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 return 1;
610 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
611 return -ENOENT;
612 }
613
614 /**
615 * smb2_get_name() - get filename string from on the wire smb format
616 * @src: source buffer
617 * @maxlen: maxlen of source string
618 * @local_nls: nls_table pointer
619 *
620 * Return: matching converted filename on success, otherwise error ptr
621 */
622 static char *
smb2_get_name(const char * src,const int maxlen,struct nls_table * local_nls)623 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
624 {
625 char *name;
626
627 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
628 if (IS_ERR(name)) {
629 pr_err("failed to get name %ld\n", PTR_ERR(name));
630 return name;
631 }
632
633 if (*name == '\\') {
634 pr_err("not allow directory name included leading slash\n");
635 kfree(name);
636 return ERR_PTR(-EINVAL);
637 }
638
639 ksmbd_conv_path_to_unix(name);
640 ksmbd_strip_last_slash(name);
641 return name;
642 }
643
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)644 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
645 {
646 struct ksmbd_conn *conn = work->conn;
647 int id;
648
649 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
650 if (id < 0) {
651 pr_err("Failed to alloc async message id\n");
652 return id;
653 }
654 work->asynchronous = true;
655 work->async_id = id;
656
657 ksmbd_debug(SMB,
658 "Send interim Response to inform async request id : %d\n",
659 work->async_id);
660
661 work->cancel_fn = fn;
662 work->cancel_argv = arg;
663
664 if (list_empty(&work->async_request_entry)) {
665 spin_lock(&conn->request_lock);
666 list_add_tail(&work->async_request_entry, &conn->async_requests);
667 spin_unlock(&conn->request_lock);
668 }
669
670 return 0;
671 }
672
release_async_work(struct ksmbd_work * work)673 void release_async_work(struct ksmbd_work *work)
674 {
675 struct ksmbd_conn *conn = work->conn;
676
677 spin_lock(&conn->request_lock);
678 list_del_init(&work->async_request_entry);
679 spin_unlock(&conn->request_lock);
680
681 work->asynchronous = 0;
682 work->cancel_fn = NULL;
683 kfree(work->cancel_argv);
684 work->cancel_argv = NULL;
685 if (work->async_id) {
686 ksmbd_release_id(&conn->async_ida, work->async_id);
687 work->async_id = 0;
688 }
689 }
690
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)691 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
692 {
693 struct smb2_hdr *rsp_hdr;
694 struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
695
696 if (allocate_interim_rsp_buf(in_work)) {
697 pr_err("smb_allocate_rsp_buf failed!\n");
698 ksmbd_free_work_struct(in_work);
699 return;
700 }
701
702 in_work->conn = work->conn;
703 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
704 __SMB2_HEADER_STRUCTURE_SIZE);
705
706 rsp_hdr = smb2_get_msg(in_work->response_buf);
707 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
708 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
709 smb2_set_err_rsp(in_work);
710 rsp_hdr->Status = status;
711
712 ksmbd_conn_write(in_work);
713 ksmbd_free_work_struct(in_work);
714 }
715
smb2_get_reparse_tag_special_file(umode_t mode)716 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
717 {
718 if (S_ISDIR(mode) || S_ISREG(mode))
719 return 0;
720
721 if (S_ISLNK(mode))
722 return IO_REPARSE_TAG_LX_SYMLINK_LE;
723 else if (S_ISFIFO(mode))
724 return IO_REPARSE_TAG_LX_FIFO_LE;
725 else if (S_ISSOCK(mode))
726 return IO_REPARSE_TAG_AF_UNIX_LE;
727 else if (S_ISCHR(mode))
728 return IO_REPARSE_TAG_LX_CHR_LE;
729 else if (S_ISBLK(mode))
730 return IO_REPARSE_TAG_LX_BLK_LE;
731
732 return 0;
733 }
734
735 /**
736 * smb2_get_dos_mode() - get file mode in dos format from unix mode
737 * @stat: kstat containing file mode
738 * @attribute: attribute flags
739 *
740 * Return: converted dos mode
741 */
smb2_get_dos_mode(struct kstat * stat,int attribute)742 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
743 {
744 int attr = 0;
745
746 if (S_ISDIR(stat->mode)) {
747 attr = FILE_ATTRIBUTE_DIRECTORY |
748 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
749 } else {
750 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
751 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
752 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
753 FILE_SUPPORTS_SPARSE_FILES))
754 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
755
756 if (smb2_get_reparse_tag_special_file(stat->mode))
757 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
758 }
759
760 return attr;
761 }
762
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)763 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
764 __le16 hash_id)
765 {
766 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
767 pneg_ctxt->DataLength = cpu_to_le16(38);
768 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
769 pneg_ctxt->Reserved = cpu_to_le32(0);
770 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
771 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
772 pneg_ctxt->HashAlgorithms = hash_id;
773 }
774
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)775 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
776 __le16 cipher_type)
777 {
778 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
779 pneg_ctxt->DataLength = cpu_to_le16(4);
780 pneg_ctxt->Reserved = cpu_to_le32(0);
781 pneg_ctxt->CipherCount = cpu_to_le16(1);
782 pneg_ctxt->Ciphers[0] = cipher_type;
783 }
784
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)785 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
786 __le16 sign_algo)
787 {
788 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
789 pneg_ctxt->DataLength =
790 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
791 - sizeof(struct smb2_neg_context));
792 pneg_ctxt->Reserved = cpu_to_le32(0);
793 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
794 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
795 }
796
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)797 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
798 {
799 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
800 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
801 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
802 pneg_ctxt->Name[0] = 0x93;
803 pneg_ctxt->Name[1] = 0xAD;
804 pneg_ctxt->Name[2] = 0x25;
805 pneg_ctxt->Name[3] = 0x50;
806 pneg_ctxt->Name[4] = 0x9C;
807 pneg_ctxt->Name[5] = 0xB4;
808 pneg_ctxt->Name[6] = 0x11;
809 pneg_ctxt->Name[7] = 0xE7;
810 pneg_ctxt->Name[8] = 0xB4;
811 pneg_ctxt->Name[9] = 0x23;
812 pneg_ctxt->Name[10] = 0x83;
813 pneg_ctxt->Name[11] = 0xDE;
814 pneg_ctxt->Name[12] = 0x96;
815 pneg_ctxt->Name[13] = 0x8B;
816 pneg_ctxt->Name[14] = 0xCD;
817 pneg_ctxt->Name[15] = 0x7C;
818 }
819
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp)820 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
821 struct smb2_negotiate_rsp *rsp)
822 {
823 char * const pneg_ctxt = (char *)rsp +
824 le32_to_cpu(rsp->NegotiateContextOffset);
825 int neg_ctxt_cnt = 1;
826 int ctxt_size;
827
828 ksmbd_debug(SMB,
829 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
830 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
831 conn->preauth_info->Preauth_HashId);
832 ctxt_size = sizeof(struct smb2_preauth_neg_context);
833
834 if (conn->cipher_type) {
835 /* Round to 8 byte boundary */
836 ctxt_size = round_up(ctxt_size, 8);
837 ksmbd_debug(SMB,
838 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
839 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
840 (pneg_ctxt + ctxt_size),
841 conn->cipher_type);
842 neg_ctxt_cnt++;
843 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
844 }
845
846 /* compression context not yet supported */
847 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
848
849 if (conn->posix_ext_supported) {
850 ctxt_size = round_up(ctxt_size, 8);
851 ksmbd_debug(SMB,
852 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
853 build_posix_ctxt((struct smb2_posix_neg_context *)
854 (pneg_ctxt + ctxt_size));
855 neg_ctxt_cnt++;
856 ctxt_size += sizeof(struct smb2_posix_neg_context);
857 }
858
859 if (conn->signing_negotiated) {
860 ctxt_size = round_up(ctxt_size, 8);
861 ksmbd_debug(SMB,
862 "assemble SMB2_SIGNING_CAPABILITIES context\n");
863 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
864 (pneg_ctxt + ctxt_size),
865 conn->signing_algorithm);
866 neg_ctxt_cnt++;
867 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
868 }
869
870 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
871 return ctxt_size + AUTH_GSS_PADDING;
872 }
873
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt,int ctxt_len)874 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
875 struct smb2_preauth_neg_context *pneg_ctxt,
876 int ctxt_len)
877 {
878 /*
879 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
880 * which may not be present. Only check for used HashAlgorithms[1].
881 */
882 if (ctxt_len <
883 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
884 return STATUS_INVALID_PARAMETER;
885
886 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
887 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
888
889 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
890 return STATUS_SUCCESS;
891 }
892
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int ctxt_len)893 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
894 struct smb2_encryption_neg_context *pneg_ctxt,
895 int ctxt_len)
896 {
897 int cph_cnt;
898 int i, cphs_size;
899
900 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
901 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
902 return;
903 }
904
905 conn->cipher_type = 0;
906
907 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
908 cphs_size = cph_cnt * sizeof(__le16);
909
910 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
911 ctxt_len) {
912 pr_err("Invalid cipher count(%d)\n", cph_cnt);
913 return;
914 }
915
916 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
917 return;
918
919 for (i = 0; i < cph_cnt; i++) {
920 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
921 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
922 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
923 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
924 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
925 pneg_ctxt->Ciphers[i]);
926 conn->cipher_type = pneg_ctxt->Ciphers[i];
927 break;
928 }
929 }
930 }
931
932 /**
933 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
934 * @conn: smb connection
935 *
936 * Return: true if connection should be encrypted, else false
937 */
smb3_encryption_negotiated(struct ksmbd_conn * conn)938 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
939 {
940 if (!conn->ops->generate_encryptionkey)
941 return false;
942
943 /*
944 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
945 * SMB 3.1.1 uses the cipher_type field.
946 */
947 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
948 conn->cipher_type;
949 }
950
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)951 static void decode_compress_ctxt(struct ksmbd_conn *conn,
952 struct smb2_compression_capabilities_context *pneg_ctxt)
953 {
954 conn->compress_algorithm = SMB3_COMPRESS_NONE;
955 }
956
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int ctxt_len)957 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
958 struct smb2_signing_capabilities *pneg_ctxt,
959 int ctxt_len)
960 {
961 int sign_algo_cnt;
962 int i, sign_alos_size;
963
964 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
965 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
966 return;
967 }
968
969 conn->signing_negotiated = false;
970 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
971 sign_alos_size = sign_algo_cnt * sizeof(__le16);
972
973 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
974 ctxt_len) {
975 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
976 return;
977 }
978
979 for (i = 0; i < sign_algo_cnt; i++) {
980 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
981 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
982 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
983 pneg_ctxt->SigningAlgorithms[i]);
984 conn->signing_negotiated = true;
985 conn->signing_algorithm =
986 pneg_ctxt->SigningAlgorithms[i];
987 break;
988 }
989 }
990 }
991
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,unsigned int len_of_smb)992 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
993 struct smb2_negotiate_req *req,
994 unsigned int len_of_smb)
995 {
996 /* +4 is to account for the RFC1001 len field */
997 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
998 int i = 0, len_of_ctxts;
999 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1000 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1001 __le32 status = STATUS_INVALID_PARAMETER;
1002
1003 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1004 if (len_of_smb <= offset) {
1005 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1006 return status;
1007 }
1008
1009 len_of_ctxts = len_of_smb - offset;
1010
1011 while (i++ < neg_ctxt_cnt) {
1012 int clen, ctxt_len;
1013
1014 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1015 break;
1016
1017 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1018 clen = le16_to_cpu(pctx->DataLength);
1019 ctxt_len = clen + sizeof(struct smb2_neg_context);
1020
1021 if (ctxt_len > len_of_ctxts)
1022 break;
1023
1024 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1025 ksmbd_debug(SMB,
1026 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1027 if (conn->preauth_info->Preauth_HashId)
1028 break;
1029
1030 status = decode_preauth_ctxt(conn,
1031 (struct smb2_preauth_neg_context *)pctx,
1032 ctxt_len);
1033 if (status != STATUS_SUCCESS)
1034 break;
1035 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1036 ksmbd_debug(SMB,
1037 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1038 if (conn->cipher_type)
1039 break;
1040
1041 decode_encrypt_ctxt(conn,
1042 (struct smb2_encryption_neg_context *)pctx,
1043 ctxt_len);
1044 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1045 ksmbd_debug(SMB,
1046 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1047 if (conn->compress_algorithm)
1048 break;
1049
1050 decode_compress_ctxt(conn,
1051 (struct smb2_compression_capabilities_context *)pctx);
1052 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1053 ksmbd_debug(SMB,
1054 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1055 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1056 ksmbd_debug(SMB,
1057 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1058 conn->posix_ext_supported = true;
1059 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1060 ksmbd_debug(SMB,
1061 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1062
1063 decode_sign_cap_ctxt(conn,
1064 (struct smb2_signing_capabilities *)pctx,
1065 ctxt_len);
1066 }
1067
1068 /* offsets must be 8 byte aligned */
1069 offset = (ctxt_len + 7) & ~0x7;
1070 len_of_ctxts -= offset;
1071 }
1072 return status;
1073 }
1074
1075 /**
1076 * smb2_handle_negotiate() - handler for smb2 negotiate command
1077 * @work: smb work containing smb request buffer
1078 *
1079 * Return: 0
1080 */
smb2_handle_negotiate(struct ksmbd_work * work)1081 int smb2_handle_negotiate(struct ksmbd_work *work)
1082 {
1083 struct ksmbd_conn *conn = work->conn;
1084 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1085 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1086 int rc = 0;
1087 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1088 __le32 status;
1089
1090 ksmbd_debug(SMB, "Received negotiate request\n");
1091 conn->need_neg = false;
1092 if (ksmbd_conn_good(conn)) {
1093 pr_err("conn->tcp_status is already in CifsGood State\n");
1094 work->send_no_response = 1;
1095 return rc;
1096 }
1097
1098 smb2_buf_len = get_rfc1002_len(work->request_buf);
1099 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1100 if (smb2_neg_size > smb2_buf_len) {
1101 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1102 rc = -EINVAL;
1103 goto err_out;
1104 }
1105
1106 if (req->DialectCount == 0) {
1107 pr_err("malformed packet\n");
1108 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1109 rc = -EINVAL;
1110 goto err_out;
1111 }
1112
1113 if (conn->dialect == SMB311_PROT_ID) {
1114 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1115
1116 if (smb2_buf_len < nego_ctxt_off) {
1117 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1118 rc = -EINVAL;
1119 goto err_out;
1120 }
1121
1122 if (smb2_neg_size > nego_ctxt_off) {
1123 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1124 rc = -EINVAL;
1125 goto err_out;
1126 }
1127
1128 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1129 nego_ctxt_off) {
1130 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1131 rc = -EINVAL;
1132 goto err_out;
1133 }
1134 } else {
1135 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1136 smb2_buf_len) {
1137 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138 rc = -EINVAL;
1139 goto err_out;
1140 }
1141 }
1142
1143 conn->cli_cap = le32_to_cpu(req->Capabilities);
1144 switch (conn->dialect) {
1145 case SMB311_PROT_ID:
1146 conn->preauth_info =
1147 kzalloc(sizeof(struct preauth_integrity_info),
1148 GFP_KERNEL);
1149 if (!conn->preauth_info) {
1150 rc = -ENOMEM;
1151 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152 goto err_out;
1153 }
1154
1155 status = deassemble_neg_contexts(conn, req,
1156 get_rfc1002_len(work->request_buf));
1157 if (status != STATUS_SUCCESS) {
1158 pr_err("deassemble_neg_contexts error(0x%x)\n",
1159 status);
1160 rsp->hdr.Status = status;
1161 rc = -EINVAL;
1162 kfree(conn->preauth_info);
1163 conn->preauth_info = NULL;
1164 goto err_out;
1165 }
1166
1167 rc = init_smb3_11_server(conn);
1168 if (rc < 0) {
1169 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1170 kfree(conn->preauth_info);
1171 conn->preauth_info = NULL;
1172 goto err_out;
1173 }
1174
1175 ksmbd_gen_preauth_integrity_hash(conn,
1176 work->request_buf,
1177 conn->preauth_info->Preauth_HashValue);
1178 rsp->NegotiateContextOffset =
1179 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1180 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1181 break;
1182 case SMB302_PROT_ID:
1183 init_smb3_02_server(conn);
1184 break;
1185 case SMB30_PROT_ID:
1186 init_smb3_0_server(conn);
1187 break;
1188 case SMB21_PROT_ID:
1189 init_smb2_1_server(conn);
1190 break;
1191 case SMB2X_PROT_ID:
1192 case BAD_PROT_ID:
1193 default:
1194 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1195 conn->dialect);
1196 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1197 rc = -EINVAL;
1198 goto err_out;
1199 }
1200 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1201
1202 /* For stats */
1203 conn->connection_type = conn->dialect;
1204
1205 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1206 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1207 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1208
1209 memcpy(conn->ClientGUID, req->ClientGUID,
1210 SMB2_CLIENT_GUID_SIZE);
1211 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1212
1213 rsp->StructureSize = cpu_to_le16(65);
1214 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1215 /* Not setting conn guid rsp->ServerGUID, as it
1216 * not used by client for identifying server
1217 */
1218 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1219
1220 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1221 rsp->ServerStartTime = 0;
1222 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1223 le32_to_cpu(rsp->NegotiateContextOffset),
1224 le16_to_cpu(rsp->NegotiateContextCount));
1225
1226 rsp->SecurityBufferOffset = cpu_to_le16(128);
1227 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1228 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1229 le16_to_cpu(rsp->SecurityBufferOffset));
1230
1231 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1232 conn->use_spnego = true;
1233
1234 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1235 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1236 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1237 conn->sign = true;
1238 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1239 server_conf.enforced_signing = true;
1240 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1241 conn->sign = true;
1242 }
1243
1244 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1245 ksmbd_conn_set_need_negotiate(conn);
1246
1247 err_out:
1248 if (rc)
1249 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1250
1251 if (!rc)
1252 rc = ksmbd_iov_pin_rsp(work, rsp,
1253 sizeof(struct smb2_negotiate_rsp) +
1254 AUTH_GSS_LENGTH + neg_ctxt_len);
1255 if (rc < 0)
1256 smb2_set_err_rsp(work);
1257 return rc;
1258 }
1259
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1260 static int alloc_preauth_hash(struct ksmbd_session *sess,
1261 struct ksmbd_conn *conn)
1262 {
1263 if (sess->Preauth_HashValue)
1264 return 0;
1265
1266 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1267 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1268 if (!sess->Preauth_HashValue)
1269 return -ENOMEM;
1270
1271 return 0;
1272 }
1273
generate_preauth_hash(struct ksmbd_work * work)1274 static int generate_preauth_hash(struct ksmbd_work *work)
1275 {
1276 struct ksmbd_conn *conn = work->conn;
1277 struct ksmbd_session *sess = work->sess;
1278 u8 *preauth_hash;
1279
1280 if (conn->dialect != SMB311_PROT_ID)
1281 return 0;
1282
1283 if (conn->binding) {
1284 struct preauth_session *preauth_sess;
1285
1286 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1287 if (!preauth_sess) {
1288 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1289 if (!preauth_sess)
1290 return -ENOMEM;
1291 }
1292
1293 preauth_hash = preauth_sess->Preauth_HashValue;
1294 } else {
1295 if (!sess->Preauth_HashValue)
1296 if (alloc_preauth_hash(sess, conn))
1297 return -ENOMEM;
1298 preauth_hash = sess->Preauth_HashValue;
1299 }
1300
1301 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1302 return 0;
1303 }
1304
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1305 static int decode_negotiation_token(struct ksmbd_conn *conn,
1306 struct negotiate_message *negblob,
1307 size_t sz)
1308 {
1309 if (!conn->use_spnego)
1310 return -EINVAL;
1311
1312 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1313 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1314 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1315 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1316 conn->use_spnego = false;
1317 }
1318 }
1319 return 0;
1320 }
1321
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len,struct smb2_sess_setup_rsp * rsp)1322 static int ntlm_negotiate(struct ksmbd_work *work,
1323 struct negotiate_message *negblob,
1324 size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1325 {
1326 struct challenge_message *chgblob;
1327 unsigned char *spnego_blob = NULL;
1328 u16 spnego_blob_len;
1329 char *neg_blob;
1330 int sz, rc;
1331
1332 ksmbd_debug(SMB, "negotiate phase\n");
1333 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1334 if (rc)
1335 return rc;
1336
1337 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1338 chgblob =
1339 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1340 memset(chgblob, 0, sizeof(struct challenge_message));
1341
1342 if (!work->conn->use_spnego) {
1343 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1344 if (sz < 0)
1345 return -ENOMEM;
1346
1347 rsp->SecurityBufferLength = cpu_to_le16(sz);
1348 return 0;
1349 }
1350
1351 sz = sizeof(struct challenge_message);
1352 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1353
1354 neg_blob = kzalloc(sz, GFP_KERNEL);
1355 if (!neg_blob)
1356 return -ENOMEM;
1357
1358 chgblob = (struct challenge_message *)neg_blob;
1359 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1360 if (sz < 0) {
1361 rc = -ENOMEM;
1362 goto out;
1363 }
1364
1365 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1366 neg_blob, sz);
1367 if (rc) {
1368 rc = -ENOMEM;
1369 goto out;
1370 }
1371
1372 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1373 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1374 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1375
1376 out:
1377 kfree(spnego_blob);
1378 kfree(neg_blob);
1379 return rc;
1380 }
1381
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1382 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1383 struct smb2_sess_setup_req *req)
1384 {
1385 int sz;
1386
1387 if (conn->use_spnego && conn->mechToken)
1388 return (struct authenticate_message *)conn->mechToken;
1389
1390 sz = le16_to_cpu(req->SecurityBufferOffset);
1391 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1392 + sz);
1393 }
1394
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1395 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1396 struct smb2_sess_setup_req *req)
1397 {
1398 struct authenticate_message *authblob;
1399 struct ksmbd_user *user;
1400 char *name;
1401 unsigned int name_off, name_len, secbuf_len;
1402
1403 if (conn->use_spnego && conn->mechToken)
1404 secbuf_len = conn->mechTokenLen;
1405 else
1406 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1407 if (secbuf_len < sizeof(struct authenticate_message)) {
1408 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1409 return NULL;
1410 }
1411 authblob = user_authblob(conn, req);
1412 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1413 name_len = le16_to_cpu(authblob->UserName.Length);
1414
1415 if (secbuf_len < (u64)name_off + name_len)
1416 return NULL;
1417
1418 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1419 name_len,
1420 true,
1421 conn->local_nls);
1422 if (IS_ERR(name)) {
1423 pr_err("cannot allocate memory\n");
1424 return NULL;
1425 }
1426
1427 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1428 user = ksmbd_login_user(name);
1429 kfree(name);
1430 return user;
1431 }
1432
ntlm_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1433 static int ntlm_authenticate(struct ksmbd_work *work,
1434 struct smb2_sess_setup_req *req,
1435 struct smb2_sess_setup_rsp *rsp)
1436 {
1437 struct ksmbd_conn *conn = work->conn;
1438 struct ksmbd_session *sess = work->sess;
1439 struct channel *chann = NULL;
1440 struct ksmbd_user *user;
1441 u64 prev_id;
1442 int sz, rc;
1443
1444 ksmbd_debug(SMB, "authenticate phase\n");
1445 if (conn->use_spnego) {
1446 unsigned char *spnego_blob;
1447 u16 spnego_blob_len;
1448
1449 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1450 &spnego_blob_len,
1451 0);
1452 if (rc)
1453 return -ENOMEM;
1454
1455 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1456 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1457 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1458 kfree(spnego_blob);
1459 }
1460
1461 user = session_user(conn, req);
1462 if (!user) {
1463 ksmbd_debug(SMB, "Unknown user name or an error\n");
1464 return -EPERM;
1465 }
1466
1467 /* Check for previous session */
1468 prev_id = le64_to_cpu(req->PreviousSessionId);
1469 if (prev_id && prev_id != sess->id)
1470 destroy_previous_session(conn, user, prev_id);
1471
1472 if (sess->state == SMB2_SESSION_VALID) {
1473 /*
1474 * Reuse session if anonymous try to connect
1475 * on reauthetication.
1476 */
1477 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1478 ksmbd_free_user(user);
1479 return 0;
1480 }
1481
1482 if (!ksmbd_compare_user(sess->user, user)) {
1483 ksmbd_free_user(user);
1484 return -EPERM;
1485 }
1486 ksmbd_free_user(user);
1487 } else {
1488 sess->user = user;
1489 }
1490
1491 if (conn->binding == false && user_guest(sess->user)) {
1492 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1493 } else {
1494 struct authenticate_message *authblob;
1495
1496 authblob = user_authblob(conn, req);
1497 if (conn->use_spnego && conn->mechToken)
1498 sz = conn->mechTokenLen;
1499 else
1500 sz = le16_to_cpu(req->SecurityBufferLength);
1501 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1502 if (rc) {
1503 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1504 ksmbd_debug(SMB, "authentication failed\n");
1505 return -EPERM;
1506 }
1507 }
1508
1509 /*
1510 * If session state is SMB2_SESSION_VALID, We can assume
1511 * that it is reauthentication. And the user/password
1512 * has been verified, so return it here.
1513 */
1514 if (sess->state == SMB2_SESSION_VALID) {
1515 if (conn->binding)
1516 goto binding_session;
1517 return 0;
1518 }
1519
1520 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1521 (conn->sign || server_conf.enforced_signing)) ||
1522 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1523 sess->sign = true;
1524
1525 if (smb3_encryption_negotiated(conn) &&
1526 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1527 rc = conn->ops->generate_encryptionkey(conn, sess);
1528 if (rc) {
1529 ksmbd_debug(SMB,
1530 "SMB3 encryption key generation failed\n");
1531 return -EINVAL;
1532 }
1533 sess->enc = true;
1534 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1535 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1536 /*
1537 * signing is disable if encryption is enable
1538 * on this session
1539 */
1540 sess->sign = false;
1541 }
1542
1543 binding_session:
1544 if (conn->dialect >= SMB30_PROT_ID) {
1545 chann = lookup_chann_list(sess, conn);
1546 if (!chann) {
1547 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1548 if (!chann)
1549 return -ENOMEM;
1550
1551 chann->conn = conn;
1552 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1553 }
1554 }
1555
1556 if (conn->ops->generate_signingkey) {
1557 rc = conn->ops->generate_signingkey(sess, conn);
1558 if (rc) {
1559 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1560 return -EINVAL;
1561 }
1562 }
1563
1564 if (!ksmbd_conn_lookup_dialect(conn)) {
1565 pr_err("fail to verify the dialect\n");
1566 return -ENOENT;
1567 }
1568 return 0;
1569 }
1570
1571 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1572 static int krb5_authenticate(struct ksmbd_work *work,
1573 struct smb2_sess_setup_req *req,
1574 struct smb2_sess_setup_rsp *rsp)
1575 {
1576 struct ksmbd_conn *conn = work->conn;
1577 struct ksmbd_session *sess = work->sess;
1578 char *in_blob, *out_blob;
1579 struct channel *chann = NULL;
1580 u64 prev_sess_id;
1581 int in_len, out_len;
1582 int retval;
1583
1584 in_blob = (char *)&req->hdr.ProtocolId +
1585 le16_to_cpu(req->SecurityBufferOffset);
1586 in_len = le16_to_cpu(req->SecurityBufferLength);
1587 out_blob = (char *)&rsp->hdr.ProtocolId +
1588 le16_to_cpu(rsp->SecurityBufferOffset);
1589 out_len = work->response_sz -
1590 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1591
1592 /* Check previous session */
1593 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1594 if (prev_sess_id && prev_sess_id != sess->id)
1595 destroy_previous_session(conn, sess->user, prev_sess_id);
1596
1597 if (sess->state == SMB2_SESSION_VALID)
1598 ksmbd_free_user(sess->user);
1599
1600 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1601 out_blob, &out_len);
1602 if (retval) {
1603 ksmbd_debug(SMB, "krb5 authentication failed\n");
1604 return -EINVAL;
1605 }
1606 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1607
1608 if ((conn->sign || server_conf.enforced_signing) ||
1609 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1610 sess->sign = true;
1611
1612 if (smb3_encryption_negotiated(conn)) {
1613 retval = conn->ops->generate_encryptionkey(conn, sess);
1614 if (retval) {
1615 ksmbd_debug(SMB,
1616 "SMB3 encryption key generation failed\n");
1617 return -EINVAL;
1618 }
1619 sess->enc = true;
1620 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1621 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1622 sess->sign = false;
1623 }
1624
1625 if (conn->dialect >= SMB30_PROT_ID) {
1626 chann = lookup_chann_list(sess, conn);
1627 if (!chann) {
1628 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1629 if (!chann)
1630 return -ENOMEM;
1631
1632 chann->conn = conn;
1633 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1634 }
1635 }
1636
1637 if (conn->ops->generate_signingkey) {
1638 retval = conn->ops->generate_signingkey(sess, conn);
1639 if (retval) {
1640 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1641 return -EINVAL;
1642 }
1643 }
1644
1645 if (!ksmbd_conn_lookup_dialect(conn)) {
1646 pr_err("fail to verify the dialect\n");
1647 return -ENOENT;
1648 }
1649 return 0;
1650 }
1651 #else
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1652 static int krb5_authenticate(struct ksmbd_work *work,
1653 struct smb2_sess_setup_req *req,
1654 struct smb2_sess_setup_rsp *rsp)
1655 {
1656 return -EOPNOTSUPP;
1657 }
1658 #endif
1659
smb2_sess_setup(struct ksmbd_work * work)1660 int smb2_sess_setup(struct ksmbd_work *work)
1661 {
1662 struct ksmbd_conn *conn = work->conn;
1663 struct smb2_sess_setup_req *req;
1664 struct smb2_sess_setup_rsp *rsp;
1665 struct ksmbd_session *sess;
1666 struct negotiate_message *negblob;
1667 unsigned int negblob_len, negblob_off;
1668 int rc = 0;
1669
1670 ksmbd_debug(SMB, "Received request for session setup\n");
1671
1672 WORK_BUFFERS(work, req, rsp);
1673
1674 rsp->StructureSize = cpu_to_le16(9);
1675 rsp->SessionFlags = 0;
1676 rsp->SecurityBufferOffset = cpu_to_le16(72);
1677 rsp->SecurityBufferLength = 0;
1678
1679 ksmbd_conn_lock(conn);
1680 if (!req->hdr.SessionId) {
1681 sess = ksmbd_smb2_session_create();
1682 if (!sess) {
1683 rc = -ENOMEM;
1684 goto out_err;
1685 }
1686 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1687 rc = ksmbd_session_register(conn, sess);
1688 if (rc)
1689 goto out_err;
1690
1691 conn->binding = false;
1692 } else if (conn->dialect >= SMB30_PROT_ID &&
1693 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1694 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1695 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1696
1697 sess = ksmbd_session_lookup_slowpath(sess_id);
1698 if (!sess) {
1699 rc = -ENOENT;
1700 goto out_err;
1701 }
1702
1703 if (conn->dialect != sess->dialect) {
1704 rc = -EINVAL;
1705 goto out_err;
1706 }
1707
1708 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1709 rc = -EINVAL;
1710 goto out_err;
1711 }
1712
1713 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1714 SMB2_CLIENT_GUID_SIZE)) {
1715 rc = -ENOENT;
1716 goto out_err;
1717 }
1718
1719 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1720 rc = -EACCES;
1721 goto out_err;
1722 }
1723
1724 if (sess->state == SMB2_SESSION_EXPIRED) {
1725 rc = -EFAULT;
1726 goto out_err;
1727 }
1728
1729 if (ksmbd_conn_need_reconnect(conn)) {
1730 rc = -EFAULT;
1731 sess = NULL;
1732 goto out_err;
1733 }
1734
1735 if (ksmbd_session_lookup(conn, sess_id)) {
1736 rc = -EACCES;
1737 goto out_err;
1738 }
1739
1740 if (user_guest(sess->user)) {
1741 rc = -EOPNOTSUPP;
1742 goto out_err;
1743 }
1744
1745 conn->binding = true;
1746 } else if ((conn->dialect < SMB30_PROT_ID ||
1747 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1748 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1749 sess = NULL;
1750 rc = -EACCES;
1751 goto out_err;
1752 } else {
1753 sess = ksmbd_session_lookup(conn,
1754 le64_to_cpu(req->hdr.SessionId));
1755 if (!sess) {
1756 rc = -ENOENT;
1757 goto out_err;
1758 }
1759
1760 if (sess->state == SMB2_SESSION_EXPIRED) {
1761 rc = -EFAULT;
1762 goto out_err;
1763 }
1764
1765 if (ksmbd_conn_need_reconnect(conn)) {
1766 rc = -EFAULT;
1767 sess = NULL;
1768 goto out_err;
1769 }
1770
1771 conn->binding = false;
1772 }
1773 work->sess = sess;
1774
1775 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1776 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1777 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1778 rc = -EINVAL;
1779 goto out_err;
1780 }
1781
1782 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1783 negblob_off);
1784
1785 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1786 if (conn->mechToken) {
1787 negblob = (struct negotiate_message *)conn->mechToken;
1788 negblob_len = conn->mechTokenLen;
1789 }
1790 }
1791
1792 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1793 rc = -EINVAL;
1794 goto out_err;
1795 }
1796
1797 if (server_conf.auth_mechs & conn->auth_mechs) {
1798 rc = generate_preauth_hash(work);
1799 if (rc)
1800 goto out_err;
1801
1802 if (conn->preferred_auth_mech &
1803 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1804 rc = krb5_authenticate(work, req, rsp);
1805 if (rc) {
1806 rc = -EINVAL;
1807 goto out_err;
1808 }
1809
1810 if (!ksmbd_conn_need_reconnect(conn)) {
1811 ksmbd_conn_set_good(conn);
1812 sess->state = SMB2_SESSION_VALID;
1813 }
1814 kfree(sess->Preauth_HashValue);
1815 sess->Preauth_HashValue = NULL;
1816 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1817 if (negblob->MessageType == NtLmNegotiate) {
1818 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1819 if (rc)
1820 goto out_err;
1821 rsp->hdr.Status =
1822 STATUS_MORE_PROCESSING_REQUIRED;
1823 } else if (negblob->MessageType == NtLmAuthenticate) {
1824 rc = ntlm_authenticate(work, req, rsp);
1825 if (rc)
1826 goto out_err;
1827
1828 if (!ksmbd_conn_need_reconnect(conn)) {
1829 ksmbd_conn_set_good(conn);
1830 sess->state = SMB2_SESSION_VALID;
1831 }
1832 if (conn->binding) {
1833 struct preauth_session *preauth_sess;
1834
1835 preauth_sess =
1836 ksmbd_preauth_session_lookup(conn, sess->id);
1837 if (preauth_sess) {
1838 list_del(&preauth_sess->preauth_entry);
1839 kfree(preauth_sess);
1840 }
1841 }
1842 kfree(sess->Preauth_HashValue);
1843 sess->Preauth_HashValue = NULL;
1844 } else {
1845 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1846 le32_to_cpu(negblob->MessageType));
1847 rc = -EINVAL;
1848 }
1849 } else {
1850 /* TODO: need one more negotiation */
1851 pr_err("Not support the preferred authentication\n");
1852 rc = -EINVAL;
1853 }
1854 } else {
1855 pr_err("Not support authentication\n");
1856 rc = -EINVAL;
1857 }
1858
1859 out_err:
1860 if (rc == -EINVAL)
1861 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1862 else if (rc == -ENOENT)
1863 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1864 else if (rc == -EACCES)
1865 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1866 else if (rc == -EFAULT)
1867 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1868 else if (rc == -ENOMEM)
1869 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1870 else if (rc == -EOPNOTSUPP)
1871 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1872 else if (rc)
1873 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1874
1875 if (conn->use_spnego && conn->mechToken) {
1876 kfree(conn->mechToken);
1877 conn->mechToken = NULL;
1878 }
1879
1880 if (rc < 0) {
1881 /*
1882 * SecurityBufferOffset should be set to zero
1883 * in session setup error response.
1884 */
1885 rsp->SecurityBufferOffset = 0;
1886
1887 if (sess) {
1888 bool try_delay = false;
1889
1890 /*
1891 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1892 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1893 * failure to make it harder to send enough random connection requests
1894 * to break into a server.
1895 */
1896 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1897 try_delay = true;
1898
1899 sess->last_active = jiffies;
1900 sess->state = SMB2_SESSION_EXPIRED;
1901 if (try_delay) {
1902 ksmbd_conn_set_need_reconnect(conn);
1903 ssleep(5);
1904 ksmbd_conn_set_need_negotiate(conn);
1905 }
1906 }
1907 smb2_set_err_rsp(work);
1908 } else {
1909 unsigned int iov_len;
1910
1911 if (rsp->SecurityBufferLength)
1912 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1913 le16_to_cpu(rsp->SecurityBufferLength);
1914 else
1915 iov_len = sizeof(struct smb2_sess_setup_rsp);
1916 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1917 if (rc)
1918 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1919 }
1920
1921 ksmbd_conn_unlock(conn);
1922 return rc;
1923 }
1924
1925 /**
1926 * smb2_tree_connect() - handler for smb2 tree connect command
1927 * @work: smb work containing smb request buffer
1928 *
1929 * Return: 0 on success, otherwise error
1930 */
smb2_tree_connect(struct ksmbd_work * work)1931 int smb2_tree_connect(struct ksmbd_work *work)
1932 {
1933 struct ksmbd_conn *conn = work->conn;
1934 struct smb2_tree_connect_req *req;
1935 struct smb2_tree_connect_rsp *rsp;
1936 struct ksmbd_session *sess = work->sess;
1937 char *treename = NULL, *name = NULL;
1938 struct ksmbd_tree_conn_status status;
1939 struct ksmbd_share_config *share = NULL;
1940 int rc = -EINVAL;
1941
1942 WORK_BUFFERS(work, req, rsp);
1943
1944 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1945 le16_to_cpu(req->PathLength), true,
1946 conn->local_nls);
1947 if (IS_ERR(treename)) {
1948 pr_err("treename is NULL\n");
1949 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1950 goto out_err1;
1951 }
1952
1953 name = ksmbd_extract_sharename(conn->um, treename);
1954 if (IS_ERR(name)) {
1955 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1956 goto out_err1;
1957 }
1958
1959 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1960 name, treename);
1961
1962 status = ksmbd_tree_conn_connect(conn, sess, name);
1963 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1964 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1965 else
1966 goto out_err1;
1967
1968 share = status.tree_conn->share_conf;
1969 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1970 ksmbd_debug(SMB, "IPC share path request\n");
1971 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1972 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1973 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1974 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1975 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1976 FILE_SYNCHRONIZE_LE;
1977 } else {
1978 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1979 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1980 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1981 if (test_tree_conn_flag(status.tree_conn,
1982 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1983 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1984 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1985 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1986 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1987 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1988 FILE_SYNCHRONIZE_LE;
1989 }
1990 }
1991
1992 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1993 if (conn->posix_ext_supported)
1994 status.tree_conn->posix_extensions = true;
1995
1996 write_lock(&sess->tree_conns_lock);
1997 status.tree_conn->t_state = TREE_CONNECTED;
1998 write_unlock(&sess->tree_conns_lock);
1999 rsp->StructureSize = cpu_to_le16(16);
2000 out_err1:
2001 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
2002 test_share_config_flag(share,
2003 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2004 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2005 else
2006 rsp->Capabilities = 0;
2007 rsp->Reserved = 0;
2008 /* default manual caching */
2009 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2010
2011 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2012 if (rc)
2013 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2014
2015 if (!IS_ERR(treename))
2016 kfree(treename);
2017 if (!IS_ERR(name))
2018 kfree(name);
2019
2020 switch (status.ret) {
2021 case KSMBD_TREE_CONN_STATUS_OK:
2022 rsp->hdr.Status = STATUS_SUCCESS;
2023 rc = 0;
2024 break;
2025 case -ESTALE:
2026 case -ENOENT:
2027 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2028 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2029 break;
2030 case -ENOMEM:
2031 case KSMBD_TREE_CONN_STATUS_NOMEM:
2032 rsp->hdr.Status = STATUS_NO_MEMORY;
2033 break;
2034 case KSMBD_TREE_CONN_STATUS_ERROR:
2035 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2036 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2037 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2038 break;
2039 case -EINVAL:
2040 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2041 break;
2042 default:
2043 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2044 }
2045
2046 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2047 smb2_set_err_rsp(work);
2048
2049 return rc;
2050 }
2051
2052 /**
2053 * smb2_create_open_flags() - convert smb open flags to unix open flags
2054 * @file_present: is file already present
2055 * @access: file access flags
2056 * @disposition: file disposition flags
2057 * @may_flags: set with MAY_ flags
2058 * @is_dir: is creating open flags for directory
2059 *
2060 * Return: file open flags
2061 */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags,bool is_dir)2062 static int smb2_create_open_flags(bool file_present, __le32 access,
2063 __le32 disposition,
2064 int *may_flags,
2065 bool is_dir)
2066 {
2067 int oflags = O_NONBLOCK | O_LARGEFILE;
2068
2069 if (is_dir) {
2070 access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
2071 ksmbd_debug(SMB, "Discard write access to a directory\n");
2072 }
2073
2074 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2075 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2076 oflags |= O_RDWR;
2077 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2078 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2079 oflags |= O_WRONLY;
2080 *may_flags = MAY_OPEN | MAY_WRITE;
2081 } else {
2082 oflags |= O_RDONLY;
2083 *may_flags = MAY_OPEN | MAY_READ;
2084 }
2085
2086 if (access == FILE_READ_ATTRIBUTES_LE)
2087 oflags |= O_PATH;
2088
2089 if (file_present) {
2090 switch (disposition & FILE_CREATE_MASK_LE) {
2091 case FILE_OPEN_LE:
2092 case FILE_CREATE_LE:
2093 break;
2094 case FILE_SUPERSEDE_LE:
2095 case FILE_OVERWRITE_LE:
2096 case FILE_OVERWRITE_IF_LE:
2097 oflags |= O_TRUNC;
2098 break;
2099 default:
2100 break;
2101 }
2102 } else {
2103 switch (disposition & FILE_CREATE_MASK_LE) {
2104 case FILE_SUPERSEDE_LE:
2105 case FILE_CREATE_LE:
2106 case FILE_OPEN_IF_LE:
2107 case FILE_OVERWRITE_IF_LE:
2108 oflags |= O_CREAT;
2109 break;
2110 case FILE_OPEN_LE:
2111 case FILE_OVERWRITE_LE:
2112 oflags &= ~O_CREAT;
2113 break;
2114 default:
2115 break;
2116 }
2117 }
2118
2119 return oflags;
2120 }
2121
2122 /**
2123 * smb2_tree_disconnect() - handler for smb tree connect request
2124 * @work: smb work containing request buffer
2125 *
2126 * Return: 0
2127 */
smb2_tree_disconnect(struct ksmbd_work * work)2128 int smb2_tree_disconnect(struct ksmbd_work *work)
2129 {
2130 struct smb2_tree_disconnect_rsp *rsp;
2131 struct smb2_tree_disconnect_req *req;
2132 struct ksmbd_session *sess = work->sess;
2133 struct ksmbd_tree_connect *tcon = work->tcon;
2134 int err;
2135
2136 WORK_BUFFERS(work, req, rsp);
2137
2138 ksmbd_debug(SMB, "request\n");
2139
2140 if (!tcon) {
2141 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2142
2143 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2144 err = -ENOENT;
2145 goto err_out;
2146 }
2147
2148 ksmbd_close_tree_conn_fds(work);
2149
2150 write_lock(&sess->tree_conns_lock);
2151 if (tcon->t_state == TREE_DISCONNECTED) {
2152 write_unlock(&sess->tree_conns_lock);
2153 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2154 err = -ENOENT;
2155 goto err_out;
2156 }
2157
2158 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2159 tcon->t_state = TREE_DISCONNECTED;
2160 write_unlock(&sess->tree_conns_lock);
2161
2162 err = ksmbd_tree_conn_disconnect(sess, tcon);
2163 if (err) {
2164 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2165 goto err_out;
2166 }
2167
2168 work->tcon = NULL;
2169
2170 rsp->StructureSize = cpu_to_le16(4);
2171 err = ksmbd_iov_pin_rsp(work, rsp,
2172 sizeof(struct smb2_tree_disconnect_rsp));
2173 if (err) {
2174 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2175 goto err_out;
2176 }
2177
2178 return 0;
2179
2180 err_out:
2181 smb2_set_err_rsp(work);
2182 return err;
2183
2184 }
2185
2186 /**
2187 * smb2_session_logoff() - handler for session log off request
2188 * @work: smb work containing request buffer
2189 *
2190 * Return: 0
2191 */
smb2_session_logoff(struct ksmbd_work * work)2192 int smb2_session_logoff(struct ksmbd_work *work)
2193 {
2194 struct ksmbd_conn *conn = work->conn;
2195 struct smb2_logoff_req *req;
2196 struct smb2_logoff_rsp *rsp;
2197 struct ksmbd_session *sess;
2198 u64 sess_id;
2199 int err;
2200
2201 WORK_BUFFERS(work, req, rsp);
2202
2203 ksmbd_debug(SMB, "request\n");
2204
2205 ksmbd_conn_lock(conn);
2206 if (!ksmbd_conn_good(conn)) {
2207 ksmbd_conn_unlock(conn);
2208 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2209 smb2_set_err_rsp(work);
2210 return -ENOENT;
2211 }
2212 sess_id = le64_to_cpu(req->hdr.SessionId);
2213 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2214 ksmbd_conn_unlock(conn);
2215
2216 ksmbd_close_session_fds(work);
2217 ksmbd_conn_wait_idle(conn);
2218
2219 /*
2220 * Re-lookup session to validate if session is deleted
2221 * while waiting request complete
2222 */
2223 sess = ksmbd_session_lookup_all(conn, sess_id);
2224 if (ksmbd_tree_conn_session_logoff(sess)) {
2225 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2226 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2227 smb2_set_err_rsp(work);
2228 return -ENOENT;
2229 }
2230
2231 ksmbd_destroy_file_table(&sess->file_table);
2232 sess->state = SMB2_SESSION_EXPIRED;
2233
2234 ksmbd_free_user(sess->user);
2235 sess->user = NULL;
2236 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2237
2238 rsp->StructureSize = cpu_to_le16(4);
2239 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2240 if (err) {
2241 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2242 smb2_set_err_rsp(work);
2243 return err;
2244 }
2245 return 0;
2246 }
2247
2248 /**
2249 * create_smb2_pipe() - create IPC pipe
2250 * @work: smb work containing request buffer
2251 *
2252 * Return: 0 on success, otherwise error
2253 */
create_smb2_pipe(struct ksmbd_work * work)2254 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2255 {
2256 struct smb2_create_rsp *rsp;
2257 struct smb2_create_req *req;
2258 int id;
2259 int err;
2260 char *name;
2261
2262 WORK_BUFFERS(work, req, rsp);
2263
2264 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2265 1, work->conn->local_nls);
2266 if (IS_ERR(name)) {
2267 rsp->hdr.Status = STATUS_NO_MEMORY;
2268 err = PTR_ERR(name);
2269 goto out;
2270 }
2271
2272 id = ksmbd_session_rpc_open(work->sess, name);
2273 if (id < 0) {
2274 pr_err("Unable to open RPC pipe: %d\n", id);
2275 err = id;
2276 goto out;
2277 }
2278
2279 rsp->hdr.Status = STATUS_SUCCESS;
2280 rsp->StructureSize = cpu_to_le16(89);
2281 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2282 rsp->Flags = 0;
2283 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2284
2285 rsp->CreationTime = cpu_to_le64(0);
2286 rsp->LastAccessTime = cpu_to_le64(0);
2287 rsp->ChangeTime = cpu_to_le64(0);
2288 rsp->AllocationSize = cpu_to_le64(0);
2289 rsp->EndofFile = cpu_to_le64(0);
2290 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2291 rsp->Reserved2 = 0;
2292 rsp->VolatileFileId = id;
2293 rsp->PersistentFileId = 0;
2294 rsp->CreateContextsOffset = 0;
2295 rsp->CreateContextsLength = 0;
2296
2297 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2298 if (err)
2299 goto out;
2300
2301 kfree(name);
2302 return 0;
2303
2304 out:
2305 switch (err) {
2306 case -EINVAL:
2307 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2308 break;
2309 case -ENOSPC:
2310 case -ENOMEM:
2311 rsp->hdr.Status = STATUS_NO_MEMORY;
2312 break;
2313 }
2314
2315 if (!IS_ERR(name))
2316 kfree(name);
2317
2318 smb2_set_err_rsp(work);
2319 return err;
2320 }
2321
2322 /**
2323 * smb2_set_ea() - handler for setting extended attributes using set
2324 * info command
2325 * @eabuf: set info command buffer
2326 * @buf_len: set info command buffer length
2327 * @path: dentry path for get ea
2328 * @get_write: get write access to a mount
2329 *
2330 * Return: 0 on success, otherwise error
2331 */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2332 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2333 const struct path *path, bool get_write)
2334 {
2335 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2336 char *attr_name = NULL, *value;
2337 int rc = 0;
2338 unsigned int next = 0;
2339
2340 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2341 le16_to_cpu(eabuf->EaValueLength))
2342 return -EINVAL;
2343
2344 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2345 if (!attr_name)
2346 return -ENOMEM;
2347
2348 do {
2349 if (!eabuf->EaNameLength)
2350 goto next;
2351
2352 ksmbd_debug(SMB,
2353 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2354 eabuf->name, eabuf->EaNameLength,
2355 le16_to_cpu(eabuf->EaValueLength),
2356 le32_to_cpu(eabuf->NextEntryOffset));
2357
2358 if (eabuf->EaNameLength >
2359 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2360 rc = -EINVAL;
2361 break;
2362 }
2363
2364 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2365 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2366 eabuf->EaNameLength);
2367 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2368 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2369
2370 if (!eabuf->EaValueLength) {
2371 rc = ksmbd_vfs_casexattr_len(idmap,
2372 path->dentry,
2373 attr_name,
2374 XATTR_USER_PREFIX_LEN +
2375 eabuf->EaNameLength);
2376
2377 /* delete the EA only when it exits */
2378 if (rc > 0) {
2379 rc = ksmbd_vfs_remove_xattr(idmap,
2380 path,
2381 attr_name,
2382 get_write);
2383
2384 if (rc < 0) {
2385 ksmbd_debug(SMB,
2386 "remove xattr failed(%d)\n",
2387 rc);
2388 break;
2389 }
2390 }
2391
2392 /* if the EA doesn't exist, just do nothing. */
2393 rc = 0;
2394 } else {
2395 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2396 le16_to_cpu(eabuf->EaValueLength),
2397 0, get_write);
2398 if (rc < 0) {
2399 ksmbd_debug(SMB,
2400 "ksmbd_vfs_setxattr is failed(%d)\n",
2401 rc);
2402 break;
2403 }
2404 }
2405
2406 next:
2407 next = le32_to_cpu(eabuf->NextEntryOffset);
2408 if (next == 0 || buf_len < next)
2409 break;
2410 buf_len -= next;
2411 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2412 if (buf_len < sizeof(struct smb2_ea_info)) {
2413 rc = -EINVAL;
2414 break;
2415 }
2416
2417 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2418 le16_to_cpu(eabuf->EaValueLength)) {
2419 rc = -EINVAL;
2420 break;
2421 }
2422 } while (next != 0);
2423
2424 kfree(attr_name);
2425 return rc;
2426 }
2427
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2428 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2429 struct ksmbd_file *fp,
2430 char *stream_name, int s_type)
2431 {
2432 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2433 size_t xattr_stream_size;
2434 char *xattr_stream_name;
2435 int rc;
2436
2437 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2438 &xattr_stream_name,
2439 &xattr_stream_size,
2440 s_type);
2441 if (rc)
2442 return rc;
2443
2444 fp->stream.name = xattr_stream_name;
2445 fp->stream.size = xattr_stream_size;
2446
2447 /* Check if there is stream prefix in xattr space */
2448 rc = ksmbd_vfs_casexattr_len(idmap,
2449 path->dentry,
2450 xattr_stream_name,
2451 xattr_stream_size);
2452 if (rc >= 0)
2453 return 0;
2454
2455 if (fp->cdoption == FILE_OPEN_LE) {
2456 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2457 return -EBADF;
2458 }
2459
2460 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2461 if (rc < 0)
2462 pr_err("Failed to store XATTR stream name :%d\n", rc);
2463 return 0;
2464 }
2465
smb2_remove_smb_xattrs(const struct path * path)2466 static int smb2_remove_smb_xattrs(const struct path *path)
2467 {
2468 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2469 char *name, *xattr_list = NULL;
2470 ssize_t xattr_list_len;
2471 int err = 0;
2472
2473 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2474 if (xattr_list_len < 0) {
2475 goto out;
2476 } else if (!xattr_list_len) {
2477 ksmbd_debug(SMB, "empty xattr in the file\n");
2478 goto out;
2479 }
2480
2481 for (name = xattr_list; name - xattr_list < xattr_list_len;
2482 name += strlen(name) + 1) {
2483 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2484
2485 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2486 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2487 STREAM_PREFIX_LEN)) {
2488 err = ksmbd_vfs_remove_xattr(idmap, path,
2489 name, true);
2490 if (err)
2491 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2492 name);
2493 }
2494 }
2495 out:
2496 kvfree(xattr_list);
2497 return err;
2498 }
2499
smb2_create_truncate(const struct path * path)2500 static int smb2_create_truncate(const struct path *path)
2501 {
2502 int rc = vfs_truncate(path, 0);
2503
2504 if (rc) {
2505 pr_err("vfs_truncate failed, rc %d\n", rc);
2506 return rc;
2507 }
2508
2509 rc = smb2_remove_smb_xattrs(path);
2510 if (rc == -EOPNOTSUPP)
2511 rc = 0;
2512 if (rc)
2513 ksmbd_debug(SMB,
2514 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2515 rc);
2516 return rc;
2517 }
2518
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2519 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2520 struct ksmbd_file *fp)
2521 {
2522 struct xattr_dos_attrib da = {0};
2523 int rc;
2524
2525 if (!test_share_config_flag(tcon->share_conf,
2526 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2527 return;
2528
2529 da.version = 4;
2530 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2531 da.itime = da.create_time = fp->create_time;
2532 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2533 XATTR_DOSINFO_ITIME;
2534
2535 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2536 if (rc)
2537 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2538 }
2539
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2540 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2541 const struct path *path, struct ksmbd_file *fp)
2542 {
2543 struct xattr_dos_attrib da;
2544 int rc;
2545
2546 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2547
2548 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2549 if (!test_share_config_flag(tcon->share_conf,
2550 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2551 return;
2552
2553 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2554 path->dentry, &da);
2555 if (rc > 0) {
2556 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2557 fp->create_time = da.create_time;
2558 fp->itime = da.itime;
2559 }
2560 }
2561
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)2562 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2563 struct path *path, char *name, int open_flags,
2564 umode_t posix_mode, bool is_dir)
2565 {
2566 struct ksmbd_tree_connect *tcon = work->tcon;
2567 struct ksmbd_share_config *share = tcon->share_conf;
2568 umode_t mode;
2569 int rc;
2570
2571 if (!(open_flags & O_CREAT))
2572 return -EBADF;
2573
2574 ksmbd_debug(SMB, "file does not exist, so creating\n");
2575 if (is_dir == true) {
2576 ksmbd_debug(SMB, "creating directory\n");
2577
2578 mode = share_config_directory_mode(share, posix_mode);
2579 rc = ksmbd_vfs_mkdir(work, name, mode);
2580 if (rc)
2581 return rc;
2582 } else {
2583 ksmbd_debug(SMB, "creating regular file\n");
2584
2585 mode = share_config_create_mode(share, posix_mode);
2586 rc = ksmbd_vfs_create(work, name, mode);
2587 if (rc)
2588 return rc;
2589 }
2590
2591 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2592 if (rc) {
2593 pr_err("cannot get linux path (%s), err = %d\n",
2594 name, rc);
2595 return rc;
2596 }
2597 return 0;
2598 }
2599
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2600 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2601 struct smb2_create_req *req,
2602 const struct path *path)
2603 {
2604 struct create_context *context;
2605 struct create_sd_buf_req *sd_buf;
2606
2607 if (!req->CreateContextsOffset)
2608 return -ENOENT;
2609
2610 /* Parse SD BUFFER create contexts */
2611 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2612 if (!context)
2613 return -ENOENT;
2614 else if (IS_ERR(context))
2615 return PTR_ERR(context);
2616
2617 ksmbd_debug(SMB,
2618 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2619 sd_buf = (struct create_sd_buf_req *)context;
2620 if (le16_to_cpu(context->DataOffset) +
2621 le32_to_cpu(context->DataLength) <
2622 sizeof(struct create_sd_buf_req))
2623 return -EINVAL;
2624 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2625 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2626 }
2627
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2628 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2629 struct mnt_idmap *idmap,
2630 struct inode *inode)
2631 {
2632 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2633 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2634
2635 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2636 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2637 fattr->cf_mode = inode->i_mode;
2638 fattr->cf_acls = NULL;
2639 fattr->cf_dacls = NULL;
2640
2641 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2642 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2643 if (S_ISDIR(inode->i_mode))
2644 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2645 }
2646 }
2647
2648 enum {
2649 DURABLE_RECONN_V2 = 1,
2650 DURABLE_RECONN,
2651 DURABLE_REQ_V2,
2652 DURABLE_REQ,
2653 };
2654
2655 struct durable_info {
2656 struct ksmbd_file *fp;
2657 unsigned short int type;
2658 bool persistent;
2659 bool reconnected;
2660 unsigned int timeout;
2661 char *CreateGuid;
2662 };
2663
parse_durable_handle_context(struct ksmbd_work * work,struct smb2_create_req * req,struct lease_ctx_info * lc,struct durable_info * dh_info)2664 static int parse_durable_handle_context(struct ksmbd_work *work,
2665 struct smb2_create_req *req,
2666 struct lease_ctx_info *lc,
2667 struct durable_info *dh_info)
2668 {
2669 struct ksmbd_conn *conn = work->conn;
2670 struct create_context *context;
2671 int dh_idx, err = 0;
2672 u64 persistent_id = 0;
2673 int req_op_level;
2674 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2675
2676 req_op_level = req->RequestedOplockLevel;
2677 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2678 dh_idx++) {
2679 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2680 if (IS_ERR(context)) {
2681 err = PTR_ERR(context);
2682 goto out;
2683 }
2684 if (!context)
2685 continue;
2686
2687 switch (dh_idx) {
2688 case DURABLE_RECONN_V2:
2689 {
2690 struct create_durable_reconn_v2_req *recon_v2;
2691
2692 if (dh_info->type == DURABLE_RECONN ||
2693 dh_info->type == DURABLE_REQ_V2) {
2694 err = -EINVAL;
2695 goto out;
2696 }
2697
2698 recon_v2 = (struct create_durable_reconn_v2_req *)context;
2699 persistent_id = recon_v2->Fid.PersistentFileId;
2700 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2701 if (!dh_info->fp) {
2702 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2703 err = -EBADF;
2704 goto out;
2705 }
2706
2707 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2708 SMB2_CREATE_GUID_SIZE)) {
2709 err = -EBADF;
2710 ksmbd_put_durable_fd(dh_info->fp);
2711 goto out;
2712 }
2713
2714 dh_info->type = dh_idx;
2715 dh_info->reconnected = true;
2716 ksmbd_debug(SMB,
2717 "reconnect v2 Persistent-id from reconnect = %llu\n",
2718 persistent_id);
2719 break;
2720 }
2721 case DURABLE_RECONN:
2722 {
2723 struct create_durable_reconn_req *recon;
2724
2725 if (dh_info->type == DURABLE_RECONN_V2 ||
2726 dh_info->type == DURABLE_REQ_V2) {
2727 err = -EINVAL;
2728 goto out;
2729 }
2730
2731 recon = (struct create_durable_reconn_req *)context;
2732 persistent_id = recon->Data.Fid.PersistentFileId;
2733 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2734 if (!dh_info->fp) {
2735 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2736 err = -EBADF;
2737 goto out;
2738 }
2739
2740 dh_info->type = dh_idx;
2741 dh_info->reconnected = true;
2742 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2743 persistent_id);
2744 break;
2745 }
2746 case DURABLE_REQ_V2:
2747 {
2748 struct create_durable_req_v2 *durable_v2_blob;
2749
2750 if (dh_info->type == DURABLE_RECONN ||
2751 dh_info->type == DURABLE_RECONN_V2) {
2752 err = -EINVAL;
2753 goto out;
2754 }
2755
2756 durable_v2_blob =
2757 (struct create_durable_req_v2 *)context;
2758 ksmbd_debug(SMB, "Request for durable v2 open\n");
2759 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2760 if (dh_info->fp) {
2761 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2762 SMB2_CLIENT_GUID_SIZE)) {
2763 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2764 err = -ENOEXEC;
2765 goto out;
2766 }
2767
2768 dh_info->fp->conn = conn;
2769 dh_info->reconnected = true;
2770 goto out;
2771 }
2772 }
2773
2774 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2775 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2776 dh_info->CreateGuid =
2777 durable_v2_blob->CreateGuid;
2778 dh_info->persistent =
2779 le32_to_cpu(durable_v2_blob->Flags);
2780 dh_info->timeout =
2781 le32_to_cpu(durable_v2_blob->Timeout);
2782 dh_info->type = dh_idx;
2783 }
2784 break;
2785 }
2786 case DURABLE_REQ:
2787 if (dh_info->type == DURABLE_RECONN)
2788 goto out;
2789 if (dh_info->type == DURABLE_RECONN_V2 ||
2790 dh_info->type == DURABLE_REQ_V2) {
2791 err = -EINVAL;
2792 goto out;
2793 }
2794
2795 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2796 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2797 ksmbd_debug(SMB, "Request for durable open\n");
2798 dh_info->type = dh_idx;
2799 }
2800 }
2801 }
2802
2803 out:
2804 return err;
2805 }
2806
2807 /**
2808 * smb2_open() - handler for smb file open request
2809 * @work: smb work containing request buffer
2810 *
2811 * Return: 0 on success, otherwise error
2812 */
smb2_open(struct ksmbd_work * work)2813 int smb2_open(struct ksmbd_work *work)
2814 {
2815 struct ksmbd_conn *conn = work->conn;
2816 struct ksmbd_session *sess = work->sess;
2817 struct ksmbd_tree_connect *tcon = work->tcon;
2818 struct smb2_create_req *req;
2819 struct smb2_create_rsp *rsp;
2820 struct path path, parent_path;
2821 struct ksmbd_share_config *share = tcon->share_conf;
2822 struct ksmbd_file *fp = NULL;
2823 struct file *filp = NULL;
2824 struct mnt_idmap *idmap = NULL;
2825 struct kstat stat;
2826 struct create_context *context;
2827 struct lease_ctx_info *lc = NULL;
2828 struct create_ea_buf_req *ea_buf = NULL;
2829 struct oplock_info *opinfo;
2830 struct durable_info dh_info = {0};
2831 __le32 *next_ptr = NULL;
2832 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2833 int rc = 0;
2834 int contxt_cnt = 0, query_disk_id = 0;
2835 int maximal_access_ctxt = 0, posix_ctxt = 0;
2836 int s_type = 0;
2837 int next_off = 0;
2838 char *name = NULL;
2839 char *stream_name = NULL;
2840 bool file_present = false, created = false, already_permitted = false;
2841 int share_ret, need_truncate = 0;
2842 u64 time;
2843 umode_t posix_mode = 0;
2844 __le32 daccess, maximal_access = 0;
2845 int iov_len = 0;
2846
2847 WORK_BUFFERS(work, req, rsp);
2848
2849 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2850 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2851 ksmbd_debug(SMB, "invalid flag in chained command\n");
2852 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2853 smb2_set_err_rsp(work);
2854 return -EINVAL;
2855 }
2856
2857 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2858 ksmbd_debug(SMB, "IPC pipe create request\n");
2859 return create_smb2_pipe(work);
2860 }
2861
2862 if (req->NameLength) {
2863 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2864 le16_to_cpu(req->NameLength),
2865 work->conn->local_nls);
2866 if (IS_ERR(name)) {
2867 rc = PTR_ERR(name);
2868 name = NULL;
2869 goto err_out2;
2870 }
2871
2872 ksmbd_debug(SMB, "converted name = %s\n", name);
2873 if (strchr(name, ':')) {
2874 if (!test_share_config_flag(work->tcon->share_conf,
2875 KSMBD_SHARE_FLAG_STREAMS)) {
2876 rc = -EBADF;
2877 goto err_out2;
2878 }
2879 rc = parse_stream_name(name, &stream_name, &s_type);
2880 if (rc < 0)
2881 goto err_out2;
2882 }
2883
2884 rc = ksmbd_validate_filename(name);
2885 if (rc < 0)
2886 goto err_out2;
2887
2888 if (ksmbd_share_veto_filename(share, name)) {
2889 rc = -ENOENT;
2890 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2891 name);
2892 goto err_out2;
2893 }
2894 } else {
2895 name = kstrdup("", GFP_KERNEL);
2896 if (!name) {
2897 rc = -ENOMEM;
2898 goto err_out2;
2899 }
2900 }
2901
2902 req_op_level = req->RequestedOplockLevel;
2903
2904 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2905 req->CreateContextsOffset) {
2906 lc = parse_lease_state(req);
2907 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2908 if (rc) {
2909 ksmbd_debug(SMB, "error parsing durable handle context\n");
2910 goto err_out2;
2911 }
2912
2913 if (dh_info.reconnected == true) {
2914 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2915 if (rc) {
2916 ksmbd_put_durable_fd(dh_info.fp);
2917 goto err_out2;
2918 }
2919
2920 rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2921 if (rc) {
2922 ksmbd_put_durable_fd(dh_info.fp);
2923 goto err_out2;
2924 }
2925
2926 if (ksmbd_override_fsids(work)) {
2927 rc = -ENOMEM;
2928 ksmbd_put_durable_fd(dh_info.fp);
2929 goto err_out2;
2930 }
2931
2932 fp = dh_info.fp;
2933 file_info = FILE_OPENED;
2934
2935 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2936 if (rc)
2937 goto err_out2;
2938
2939 ksmbd_put_durable_fd(fp);
2940 goto reconnected_fp;
2941 }
2942 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2943 lc = parse_lease_state(req);
2944
2945 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2946 pr_err("Invalid impersonationlevel : 0x%x\n",
2947 le32_to_cpu(req->ImpersonationLevel));
2948 rc = -EIO;
2949 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2950 goto err_out2;
2951 }
2952
2953 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2954 pr_err("Invalid create options : 0x%x\n",
2955 le32_to_cpu(req->CreateOptions));
2956 rc = -EINVAL;
2957 goto err_out2;
2958 } else {
2959 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2960 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2961 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2962
2963 if (req->CreateOptions &
2964 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2965 FILE_RESERVE_OPFILTER_LE)) {
2966 rc = -EOPNOTSUPP;
2967 goto err_out2;
2968 }
2969
2970 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2971 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2972 rc = -EINVAL;
2973 goto err_out2;
2974 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2975 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2976 }
2977 }
2978 }
2979
2980 if (le32_to_cpu(req->CreateDisposition) >
2981 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2982 pr_err("Invalid create disposition : 0x%x\n",
2983 le32_to_cpu(req->CreateDisposition));
2984 rc = -EINVAL;
2985 goto err_out2;
2986 }
2987
2988 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2989 pr_err("Invalid desired access : 0x%x\n",
2990 le32_to_cpu(req->DesiredAccess));
2991 rc = -EACCES;
2992 goto err_out2;
2993 }
2994
2995 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2996 pr_err("Invalid file attribute : 0x%x\n",
2997 le32_to_cpu(req->FileAttributes));
2998 rc = -EINVAL;
2999 goto err_out2;
3000 }
3001
3002 if (req->CreateContextsOffset) {
3003 /* Parse non-durable handle create contexts */
3004 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
3005 if (IS_ERR(context)) {
3006 rc = PTR_ERR(context);
3007 goto err_out2;
3008 } else if (context) {
3009 ea_buf = (struct create_ea_buf_req *)context;
3010 if (le16_to_cpu(context->DataOffset) +
3011 le32_to_cpu(context->DataLength) <
3012 sizeof(struct create_ea_buf_req)) {
3013 rc = -EINVAL;
3014 goto err_out2;
3015 }
3016 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3017 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3018 rc = -EACCES;
3019 goto err_out2;
3020 }
3021 }
3022
3023 context = smb2_find_context_vals(req,
3024 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3025 if (IS_ERR(context)) {
3026 rc = PTR_ERR(context);
3027 goto err_out2;
3028 } else if (context) {
3029 ksmbd_debug(SMB,
3030 "get query maximal access context\n");
3031 maximal_access_ctxt = 1;
3032 }
3033
3034 context = smb2_find_context_vals(req,
3035 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3036 if (IS_ERR(context)) {
3037 rc = PTR_ERR(context);
3038 goto err_out2;
3039 } else if (context) {
3040 ksmbd_debug(SMB, "get timewarp context\n");
3041 rc = -EBADF;
3042 goto err_out2;
3043 }
3044
3045 if (tcon->posix_extensions) {
3046 context = smb2_find_context_vals(req,
3047 SMB2_CREATE_TAG_POSIX, 16);
3048 if (IS_ERR(context)) {
3049 rc = PTR_ERR(context);
3050 goto err_out2;
3051 } else if (context) {
3052 struct create_posix *posix =
3053 (struct create_posix *)context;
3054 if (le16_to_cpu(context->DataOffset) +
3055 le32_to_cpu(context->DataLength) <
3056 sizeof(struct create_posix) - 4) {
3057 rc = -EINVAL;
3058 goto err_out2;
3059 }
3060 ksmbd_debug(SMB, "get posix context\n");
3061
3062 posix_mode = le32_to_cpu(posix->Mode);
3063 posix_ctxt = 1;
3064 }
3065 }
3066 }
3067
3068 if (ksmbd_override_fsids(work)) {
3069 rc = -ENOMEM;
3070 goto err_out2;
3071 }
3072
3073 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3074 &parent_path, &path, 1);
3075 if (!rc) {
3076 file_present = true;
3077
3078 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3079 /*
3080 * If file exists with under flags, return access
3081 * denied error.
3082 */
3083 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3084 req->CreateDisposition == FILE_OPEN_IF_LE) {
3085 rc = -EACCES;
3086 goto err_out;
3087 }
3088
3089 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3090 ksmbd_debug(SMB,
3091 "User does not have write permission\n");
3092 rc = -EACCES;
3093 goto err_out;
3094 }
3095 } else if (d_is_symlink(path.dentry)) {
3096 rc = -EACCES;
3097 goto err_out;
3098 }
3099
3100 file_present = true;
3101 idmap = mnt_idmap(path.mnt);
3102 } else {
3103 if (rc != -ENOENT)
3104 goto err_out;
3105 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3106 name, rc);
3107 rc = 0;
3108 }
3109
3110 if (stream_name) {
3111 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3112 if (s_type == DATA_STREAM) {
3113 rc = -EIO;
3114 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3115 }
3116 } else {
3117 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3118 s_type == DATA_STREAM) {
3119 rc = -EIO;
3120 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3121 }
3122 }
3123
3124 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3125 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3126 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3127 rc = -EIO;
3128 }
3129
3130 if (rc < 0)
3131 goto err_out;
3132 }
3133
3134 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3135 S_ISDIR(d_inode(path.dentry)->i_mode) &&
3136 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3137 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3138 name, req->CreateOptions);
3139 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3140 rc = -EIO;
3141 goto err_out;
3142 }
3143
3144 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3145 !(req->CreateDisposition == FILE_CREATE_LE) &&
3146 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3147 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3148 rc = -EIO;
3149 goto err_out;
3150 }
3151
3152 if (!stream_name && file_present &&
3153 req->CreateDisposition == FILE_CREATE_LE) {
3154 rc = -EEXIST;
3155 goto err_out;
3156 }
3157
3158 daccess = smb_map_generic_desired_access(req->DesiredAccess);
3159
3160 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3161 rc = smb_check_perm_dacl(conn, &path, &daccess,
3162 sess->user->uid);
3163 if (rc)
3164 goto err_out;
3165 }
3166
3167 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3168 if (!file_present) {
3169 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3170 } else {
3171 ksmbd_vfs_query_maximal_access(idmap,
3172 path.dentry,
3173 &daccess);
3174 already_permitted = true;
3175 }
3176 maximal_access = daccess;
3177 }
3178
3179 open_flags = smb2_create_open_flags(file_present, daccess,
3180 req->CreateDisposition,
3181 &may_flags,
3182 req->CreateOptions & FILE_DIRECTORY_FILE_LE ||
3183 (file_present && S_ISDIR(d_inode(path.dentry)->i_mode)));
3184
3185 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3186 if (open_flags & (O_CREAT | O_TRUNC)) {
3187 ksmbd_debug(SMB,
3188 "User does not have write permission\n");
3189 rc = -EACCES;
3190 goto err_out;
3191 }
3192 }
3193
3194 /*create file if not present */
3195 if (!file_present) {
3196 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3197 posix_mode,
3198 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3199 if (rc) {
3200 if (rc == -ENOENT) {
3201 rc = -EIO;
3202 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3203 }
3204 goto err_out;
3205 }
3206
3207 created = true;
3208 idmap = mnt_idmap(path.mnt);
3209 if (ea_buf) {
3210 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3211 sizeof(struct smb2_ea_info)) {
3212 rc = -EINVAL;
3213 goto err_out;
3214 }
3215
3216 rc = smb2_set_ea(&ea_buf->ea,
3217 le32_to_cpu(ea_buf->ccontext.DataLength),
3218 &path, false);
3219 if (rc == -EOPNOTSUPP)
3220 rc = 0;
3221 else if (rc)
3222 goto err_out;
3223 }
3224 } else if (!already_permitted) {
3225 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3226 * because execute(search) permission on a parent directory,
3227 * is already granted.
3228 */
3229 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3230 rc = inode_permission(idmap,
3231 d_inode(path.dentry),
3232 may_flags);
3233 if (rc)
3234 goto err_out;
3235
3236 if ((daccess & FILE_DELETE_LE) ||
3237 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3238 rc = inode_permission(idmap,
3239 d_inode(path.dentry->d_parent),
3240 MAY_EXEC | MAY_WRITE);
3241 if (rc)
3242 goto err_out;
3243 }
3244 }
3245 }
3246
3247 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3248 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3249 rc = -EBUSY;
3250 goto err_out;
3251 }
3252
3253 rc = 0;
3254 filp = dentry_open(&path, open_flags, current_cred());
3255 if (IS_ERR(filp)) {
3256 rc = PTR_ERR(filp);
3257 pr_err("dentry open for dir failed, rc %d\n", rc);
3258 goto err_out;
3259 }
3260
3261 if (file_present) {
3262 if (!(open_flags & O_TRUNC))
3263 file_info = FILE_OPENED;
3264 else
3265 file_info = FILE_OVERWRITTEN;
3266
3267 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3268 FILE_SUPERSEDE_LE)
3269 file_info = FILE_SUPERSEDED;
3270 } else if (open_flags & O_CREAT) {
3271 file_info = FILE_CREATED;
3272 }
3273
3274 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3275
3276 /* Obtain Volatile-ID */
3277 fp = ksmbd_open_fd(work, filp);
3278 if (IS_ERR(fp)) {
3279 fput(filp);
3280 rc = PTR_ERR(fp);
3281 fp = NULL;
3282 goto err_out;
3283 }
3284
3285 /* Get Persistent-ID */
3286 ksmbd_open_durable_fd(fp);
3287 if (!has_file_id(fp->persistent_id)) {
3288 rc = -ENOMEM;
3289 goto err_out;
3290 }
3291
3292 fp->cdoption = req->CreateDisposition;
3293 fp->daccess = daccess;
3294 fp->saccess = req->ShareAccess;
3295 fp->coption = req->CreateOptions;
3296
3297 /* Set default windows and posix acls if creating new file */
3298 if (created) {
3299 int posix_acl_rc;
3300 struct inode *inode = d_inode(path.dentry);
3301
3302 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3303 &path,
3304 d_inode(path.dentry->d_parent));
3305 if (posix_acl_rc)
3306 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3307
3308 if (test_share_config_flag(work->tcon->share_conf,
3309 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3310 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3311 sess->user->gid);
3312 }
3313
3314 if (rc) {
3315 rc = smb2_create_sd_buffer(work, req, &path);
3316 if (rc) {
3317 if (posix_acl_rc)
3318 ksmbd_vfs_set_init_posix_acl(idmap,
3319 &path);
3320
3321 if (test_share_config_flag(work->tcon->share_conf,
3322 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3323 struct smb_fattr fattr;
3324 struct smb_ntsd *pntsd;
3325 int pntsd_size, ace_num = 0;
3326
3327 ksmbd_acls_fattr(&fattr, idmap, inode);
3328 if (fattr.cf_acls)
3329 ace_num = fattr.cf_acls->a_count;
3330 if (fattr.cf_dacls)
3331 ace_num += fattr.cf_dacls->a_count;
3332
3333 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3334 sizeof(struct smb_sid) * 3 +
3335 sizeof(struct smb_acl) +
3336 sizeof(struct smb_ace) * ace_num * 2,
3337 GFP_KERNEL);
3338 if (!pntsd) {
3339 posix_acl_release(fattr.cf_acls);
3340 posix_acl_release(fattr.cf_dacls);
3341 goto err_out;
3342 }
3343
3344 rc = build_sec_desc(idmap,
3345 pntsd, NULL, 0,
3346 OWNER_SECINFO |
3347 GROUP_SECINFO |
3348 DACL_SECINFO,
3349 &pntsd_size, &fattr);
3350 posix_acl_release(fattr.cf_acls);
3351 posix_acl_release(fattr.cf_dacls);
3352 if (rc) {
3353 kfree(pntsd);
3354 goto err_out;
3355 }
3356
3357 rc = ksmbd_vfs_set_sd_xattr(conn,
3358 idmap,
3359 &path,
3360 pntsd,
3361 pntsd_size,
3362 false);
3363 kfree(pntsd);
3364 if (rc)
3365 pr_err("failed to store ntacl in xattr : %d\n",
3366 rc);
3367 }
3368 }
3369 }
3370 rc = 0;
3371 }
3372
3373 if (stream_name) {
3374 rc = smb2_set_stream_name_xattr(&path,
3375 fp,
3376 stream_name,
3377 s_type);
3378 if (rc)
3379 goto err_out;
3380 file_info = FILE_CREATED;
3381 }
3382
3383 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3384 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3385
3386 /* fp should be searchable through ksmbd_inode.m_fp_list
3387 * after daccess, saccess, attrib_only, and stream are
3388 * initialized.
3389 */
3390 down_write(&fp->f_ci->m_lock);
3391 list_add(&fp->node, &fp->f_ci->m_fp_list);
3392 up_write(&fp->f_ci->m_lock);
3393
3394 /* Check delete pending among previous fp before oplock break */
3395 if (ksmbd_inode_pending_delete(fp)) {
3396 rc = -EBUSY;
3397 goto err_out;
3398 }
3399
3400 if (file_present || created)
3401 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3402
3403 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3404 !fp->attrib_only && !stream_name) {
3405 smb_break_all_oplock(work, fp);
3406 need_truncate = 1;
3407 }
3408
3409 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3410 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3411 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3412 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3413 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3414 rc = share_ret;
3415 goto err_out1;
3416 }
3417 } else {
3418 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {
3419 if (S_ISDIR(file_inode(filp)->i_mode)) {
3420 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3421 lc->is_dir = true;
3422 }
3423
3424 /*
3425 * Compare parent lease using parent key. If there is no
3426 * a lease that has same parent key, Send lease break
3427 * notification.
3428 */
3429 smb_send_parent_lease_break_noti(fp, lc);
3430
3431 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3432 ksmbd_debug(SMB,
3433 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3434 name, req_op_level, lc->req_state);
3435 rc = find_same_lease_key(sess, fp->f_ci, lc);
3436 if (rc)
3437 goto err_out1;
3438 } else if (open_flags == O_RDONLY &&
3439 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3440 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3441 req_op_level = SMB2_OPLOCK_LEVEL_II;
3442
3443 rc = smb_grant_oplock(work, req_op_level,
3444 fp->persistent_id, fp,
3445 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3446 lc, share_ret);
3447 if (rc < 0)
3448 goto err_out1;
3449 }
3450
3451 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3452 ksmbd_fd_set_delete_on_close(fp, file_info);
3453
3454 if (need_truncate) {
3455 rc = smb2_create_truncate(&fp->filp->f_path);
3456 if (rc)
3457 goto err_out1;
3458 }
3459
3460 if (req->CreateContextsOffset) {
3461 struct create_alloc_size_req *az_req;
3462
3463 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3464 SMB2_CREATE_ALLOCATION_SIZE, 4);
3465 if (IS_ERR(az_req)) {
3466 rc = PTR_ERR(az_req);
3467 goto err_out1;
3468 } else if (az_req) {
3469 loff_t alloc_size;
3470 int err;
3471
3472 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3473 le32_to_cpu(az_req->ccontext.DataLength) <
3474 sizeof(struct create_alloc_size_req)) {
3475 rc = -EINVAL;
3476 goto err_out1;
3477 }
3478 alloc_size = le64_to_cpu(az_req->AllocationSize);
3479 ksmbd_debug(SMB,
3480 "request smb2 create allocate size : %llu\n",
3481 alloc_size);
3482 smb_break_all_levII_oplock(work, fp, 1);
3483 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3484 alloc_size);
3485 if (err < 0)
3486 ksmbd_debug(SMB,
3487 "vfs_fallocate is failed : %d\n",
3488 err);
3489 }
3490
3491 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3492 if (IS_ERR(context)) {
3493 rc = PTR_ERR(context);
3494 goto err_out1;
3495 } else if (context) {
3496 ksmbd_debug(SMB, "get query on disk id context\n");
3497 query_disk_id = 1;
3498 }
3499 }
3500
3501 rc = ksmbd_vfs_getattr(&path, &stat);
3502 if (rc)
3503 goto err_out1;
3504
3505 if (stat.result_mask & STATX_BTIME)
3506 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3507 else
3508 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3509 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3510 fp->f_ci->m_fattr =
3511 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3512
3513 if (!created)
3514 smb2_update_xattrs(tcon, &path, fp);
3515 else
3516 smb2_new_xattrs(tcon, &path, fp);
3517
3518 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3519
3520 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3521 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3522 test_share_config_flag(work->tcon->share_conf,
3523 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3524 fp->is_persistent = true;
3525 else
3526 fp->is_durable = true;
3527
3528 if (dh_info.type == DURABLE_REQ_V2) {
3529 memcpy(fp->create_guid, dh_info.CreateGuid,
3530 SMB2_CREATE_GUID_SIZE);
3531 if (dh_info.timeout)
3532 fp->durable_timeout = min(dh_info.timeout,
3533 300000);
3534 else
3535 fp->durable_timeout = 60;
3536 }
3537 }
3538
3539 reconnected_fp:
3540 rsp->StructureSize = cpu_to_le16(89);
3541 rcu_read_lock();
3542 opinfo = rcu_dereference(fp->f_opinfo);
3543 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3544 rcu_read_unlock();
3545 rsp->Flags = 0;
3546 rsp->CreateAction = cpu_to_le32(file_info);
3547 rsp->CreationTime = cpu_to_le64(fp->create_time);
3548 time = ksmbd_UnixTimeToNT(stat.atime);
3549 rsp->LastAccessTime = cpu_to_le64(time);
3550 time = ksmbd_UnixTimeToNT(stat.mtime);
3551 rsp->LastWriteTime = cpu_to_le64(time);
3552 time = ksmbd_UnixTimeToNT(stat.ctime);
3553 rsp->ChangeTime = cpu_to_le64(time);
3554 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3555 cpu_to_le64(stat.blocks << 9);
3556 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3557 rsp->FileAttributes = fp->f_ci->m_fattr;
3558
3559 rsp->Reserved2 = 0;
3560
3561 rsp->PersistentFileId = fp->persistent_id;
3562 rsp->VolatileFileId = fp->volatile_id;
3563
3564 rsp->CreateContextsOffset = 0;
3565 rsp->CreateContextsLength = 0;
3566 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3567
3568 /* If lease is request send lease context response */
3569 if (opinfo && opinfo->is_lease) {
3570 struct create_context *lease_ccontext;
3571
3572 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3573 name, opinfo->o_lease->state);
3574 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3575
3576 lease_ccontext = (struct create_context *)rsp->Buffer;
3577 contxt_cnt++;
3578 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3579 le32_add_cpu(&rsp->CreateContextsLength,
3580 conn->vals->create_lease_size);
3581 iov_len += conn->vals->create_lease_size;
3582 next_ptr = &lease_ccontext->Next;
3583 next_off = conn->vals->create_lease_size;
3584 }
3585
3586 if (maximal_access_ctxt) {
3587 struct create_context *mxac_ccontext;
3588
3589 if (maximal_access == 0)
3590 ksmbd_vfs_query_maximal_access(idmap,
3591 path.dentry,
3592 &maximal_access);
3593 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3594 le32_to_cpu(rsp->CreateContextsLength));
3595 contxt_cnt++;
3596 create_mxac_rsp_buf(rsp->Buffer +
3597 le32_to_cpu(rsp->CreateContextsLength),
3598 le32_to_cpu(maximal_access));
3599 le32_add_cpu(&rsp->CreateContextsLength,
3600 conn->vals->create_mxac_size);
3601 iov_len += conn->vals->create_mxac_size;
3602 if (next_ptr)
3603 *next_ptr = cpu_to_le32(next_off);
3604 next_ptr = &mxac_ccontext->Next;
3605 next_off = conn->vals->create_mxac_size;
3606 }
3607
3608 if (query_disk_id) {
3609 struct create_context *disk_id_ccontext;
3610
3611 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3612 le32_to_cpu(rsp->CreateContextsLength));
3613 contxt_cnt++;
3614 create_disk_id_rsp_buf(rsp->Buffer +
3615 le32_to_cpu(rsp->CreateContextsLength),
3616 stat.ino, tcon->id);
3617 le32_add_cpu(&rsp->CreateContextsLength,
3618 conn->vals->create_disk_id_size);
3619 iov_len += conn->vals->create_disk_id_size;
3620 if (next_ptr)
3621 *next_ptr = cpu_to_le32(next_off);
3622 next_ptr = &disk_id_ccontext->Next;
3623 next_off = conn->vals->create_disk_id_size;
3624 }
3625
3626 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3627 struct create_context *durable_ccontext;
3628
3629 durable_ccontext = (struct create_context *)(rsp->Buffer +
3630 le32_to_cpu(rsp->CreateContextsLength));
3631 contxt_cnt++;
3632 if (dh_info.type == DURABLE_REQ) {
3633 create_durable_rsp_buf(rsp->Buffer +
3634 le32_to_cpu(rsp->CreateContextsLength));
3635 le32_add_cpu(&rsp->CreateContextsLength,
3636 conn->vals->create_durable_size);
3637 iov_len += conn->vals->create_durable_size;
3638 } else {
3639 create_durable_v2_rsp_buf(rsp->Buffer +
3640 le32_to_cpu(rsp->CreateContextsLength),
3641 fp);
3642 le32_add_cpu(&rsp->CreateContextsLength,
3643 conn->vals->create_durable_v2_size);
3644 iov_len += conn->vals->create_durable_v2_size;
3645 }
3646
3647 if (next_ptr)
3648 *next_ptr = cpu_to_le32(next_off);
3649 next_ptr = &durable_ccontext->Next;
3650 next_off = conn->vals->create_durable_size;
3651 }
3652
3653 if (posix_ctxt) {
3654 contxt_cnt++;
3655 create_posix_rsp_buf(rsp->Buffer +
3656 le32_to_cpu(rsp->CreateContextsLength),
3657 fp);
3658 le32_add_cpu(&rsp->CreateContextsLength,
3659 conn->vals->create_posix_size);
3660 iov_len += conn->vals->create_posix_size;
3661 if (next_ptr)
3662 *next_ptr = cpu_to_le32(next_off);
3663 }
3664
3665 if (contxt_cnt > 0) {
3666 rsp->CreateContextsOffset =
3667 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3668 }
3669
3670 err_out:
3671 if (rc && (file_present || created))
3672 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3673
3674 err_out1:
3675 ksmbd_revert_fsids(work);
3676
3677 err_out2:
3678 if (!rc) {
3679 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3680 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3681 }
3682 if (rc) {
3683 if (rc == -EINVAL)
3684 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3685 else if (rc == -EOPNOTSUPP)
3686 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3687 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3688 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3689 else if (rc == -ENOENT)
3690 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3691 else if (rc == -EPERM)
3692 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3693 else if (rc == -EBUSY)
3694 rsp->hdr.Status = STATUS_DELETE_PENDING;
3695 else if (rc == -EBADF)
3696 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3697 else if (rc == -ENOEXEC)
3698 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3699 else if (rc == -ENXIO)
3700 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3701 else if (rc == -EEXIST)
3702 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3703 else if (rc == -EMFILE)
3704 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3705 if (!rsp->hdr.Status)
3706 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3707
3708 if (fp)
3709 ksmbd_fd_put(work, fp);
3710 smb2_set_err_rsp(work);
3711 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3712 }
3713
3714 kfree(name);
3715 kfree(lc);
3716
3717 return 0;
3718 }
3719
readdir_info_level_struct_sz(int info_level)3720 static int readdir_info_level_struct_sz(int info_level)
3721 {
3722 switch (info_level) {
3723 case FILE_FULL_DIRECTORY_INFORMATION:
3724 return sizeof(struct file_full_directory_info);
3725 case FILE_BOTH_DIRECTORY_INFORMATION:
3726 return sizeof(struct file_both_directory_info);
3727 case FILE_DIRECTORY_INFORMATION:
3728 return sizeof(struct file_directory_info);
3729 case FILE_NAMES_INFORMATION:
3730 return sizeof(struct file_names_info);
3731 case FILEID_FULL_DIRECTORY_INFORMATION:
3732 return sizeof(struct file_id_full_dir_info);
3733 case FILEID_BOTH_DIRECTORY_INFORMATION:
3734 return sizeof(struct file_id_both_directory_info);
3735 case SMB_FIND_FILE_POSIX_INFO:
3736 return sizeof(struct smb2_posix_info);
3737 default:
3738 return -EOPNOTSUPP;
3739 }
3740 }
3741
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3742 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3743 {
3744 switch (info_level) {
3745 case FILE_FULL_DIRECTORY_INFORMATION:
3746 {
3747 struct file_full_directory_info *ffdinfo;
3748
3749 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3750 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3751 d_info->name = ffdinfo->FileName;
3752 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3753 return 0;
3754 }
3755 case FILE_BOTH_DIRECTORY_INFORMATION:
3756 {
3757 struct file_both_directory_info *fbdinfo;
3758
3759 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3760 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3761 d_info->name = fbdinfo->FileName;
3762 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3763 return 0;
3764 }
3765 case FILE_DIRECTORY_INFORMATION:
3766 {
3767 struct file_directory_info *fdinfo;
3768
3769 fdinfo = (struct file_directory_info *)d_info->rptr;
3770 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3771 d_info->name = fdinfo->FileName;
3772 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3773 return 0;
3774 }
3775 case FILE_NAMES_INFORMATION:
3776 {
3777 struct file_names_info *fninfo;
3778
3779 fninfo = (struct file_names_info *)d_info->rptr;
3780 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3781 d_info->name = fninfo->FileName;
3782 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3783 return 0;
3784 }
3785 case FILEID_FULL_DIRECTORY_INFORMATION:
3786 {
3787 struct file_id_full_dir_info *dinfo;
3788
3789 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3790 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3791 d_info->name = dinfo->FileName;
3792 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3793 return 0;
3794 }
3795 case FILEID_BOTH_DIRECTORY_INFORMATION:
3796 {
3797 struct file_id_both_directory_info *fibdinfo;
3798
3799 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3800 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3801 d_info->name = fibdinfo->FileName;
3802 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3803 return 0;
3804 }
3805 case SMB_FIND_FILE_POSIX_INFO:
3806 {
3807 struct smb2_posix_info *posix_info;
3808
3809 posix_info = (struct smb2_posix_info *)d_info->rptr;
3810 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3811 d_info->name = posix_info->name;
3812 d_info->name_len = le32_to_cpu(posix_info->name_len);
3813 return 0;
3814 }
3815 default:
3816 return -EINVAL;
3817 }
3818 }
3819
3820 /**
3821 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3822 * buffer
3823 * @conn: connection instance
3824 * @info_level: smb information level
3825 * @d_info: structure included variables for query dir
3826 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3827 *
3828 * if directory has many entries, find first can't read it fully.
3829 * find next might be called multiple times to read remaining dir entries
3830 *
3831 * Return: 0 on success, otherwise error
3832 */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3833 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3834 struct ksmbd_dir_info *d_info,
3835 struct ksmbd_kstat *ksmbd_kstat)
3836 {
3837 int next_entry_offset = 0;
3838 char *conv_name;
3839 int conv_len;
3840 void *kstat;
3841 int struct_sz, rc = 0;
3842
3843 conv_name = ksmbd_convert_dir_info_name(d_info,
3844 conn->local_nls,
3845 &conv_len);
3846 if (!conv_name)
3847 return -ENOMEM;
3848
3849 /* Somehow the name has only terminating NULL bytes */
3850 if (conv_len < 0) {
3851 rc = -EINVAL;
3852 goto free_conv_name;
3853 }
3854
3855 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3856 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3857 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3858
3859 if (next_entry_offset > d_info->out_buf_len) {
3860 d_info->out_buf_len = 0;
3861 rc = -ENOSPC;
3862 goto free_conv_name;
3863 }
3864
3865 kstat = d_info->wptr;
3866 if (info_level != FILE_NAMES_INFORMATION)
3867 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3868
3869 switch (info_level) {
3870 case FILE_FULL_DIRECTORY_INFORMATION:
3871 {
3872 struct file_full_directory_info *ffdinfo;
3873
3874 ffdinfo = (struct file_full_directory_info *)kstat;
3875 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3876 ffdinfo->EaSize =
3877 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3878 if (ffdinfo->EaSize)
3879 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3880 if (d_info->hide_dot_file && d_info->name[0] == '.')
3881 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3882 memcpy(ffdinfo->FileName, conv_name, conv_len);
3883 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3884 break;
3885 }
3886 case FILE_BOTH_DIRECTORY_INFORMATION:
3887 {
3888 struct file_both_directory_info *fbdinfo;
3889
3890 fbdinfo = (struct file_both_directory_info *)kstat;
3891 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3892 fbdinfo->EaSize =
3893 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3894 if (fbdinfo->EaSize)
3895 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3896 fbdinfo->ShortNameLength = 0;
3897 fbdinfo->Reserved = 0;
3898 if (d_info->hide_dot_file && d_info->name[0] == '.')
3899 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3900 memcpy(fbdinfo->FileName, conv_name, conv_len);
3901 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3902 break;
3903 }
3904 case FILE_DIRECTORY_INFORMATION:
3905 {
3906 struct file_directory_info *fdinfo;
3907
3908 fdinfo = (struct file_directory_info *)kstat;
3909 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3910 if (d_info->hide_dot_file && d_info->name[0] == '.')
3911 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3912 memcpy(fdinfo->FileName, conv_name, conv_len);
3913 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3914 break;
3915 }
3916 case FILE_NAMES_INFORMATION:
3917 {
3918 struct file_names_info *fninfo;
3919
3920 fninfo = (struct file_names_info *)kstat;
3921 fninfo->FileNameLength = cpu_to_le32(conv_len);
3922 memcpy(fninfo->FileName, conv_name, conv_len);
3923 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3924 break;
3925 }
3926 case FILEID_FULL_DIRECTORY_INFORMATION:
3927 {
3928 struct file_id_full_dir_info *dinfo;
3929
3930 dinfo = (struct file_id_full_dir_info *)kstat;
3931 dinfo->FileNameLength = cpu_to_le32(conv_len);
3932 dinfo->EaSize =
3933 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3934 if (dinfo->EaSize)
3935 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3936 dinfo->Reserved = 0;
3937 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3938 if (d_info->hide_dot_file && d_info->name[0] == '.')
3939 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3940 memcpy(dinfo->FileName, conv_name, conv_len);
3941 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3942 break;
3943 }
3944 case FILEID_BOTH_DIRECTORY_INFORMATION:
3945 {
3946 struct file_id_both_directory_info *fibdinfo;
3947
3948 fibdinfo = (struct file_id_both_directory_info *)kstat;
3949 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3950 fibdinfo->EaSize =
3951 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3952 if (fibdinfo->EaSize)
3953 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3954 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3955 fibdinfo->ShortNameLength = 0;
3956 fibdinfo->Reserved = 0;
3957 fibdinfo->Reserved2 = cpu_to_le16(0);
3958 if (d_info->hide_dot_file && d_info->name[0] == '.')
3959 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3960 memcpy(fibdinfo->FileName, conv_name, conv_len);
3961 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3962 break;
3963 }
3964 case SMB_FIND_FILE_POSIX_INFO:
3965 {
3966 struct smb2_posix_info *posix_info;
3967 u64 time;
3968
3969 posix_info = (struct smb2_posix_info *)kstat;
3970 posix_info->Ignored = 0;
3971 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3972 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3973 posix_info->ChangeTime = cpu_to_le64(time);
3974 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3975 posix_info->LastAccessTime = cpu_to_le64(time);
3976 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3977 posix_info->LastWriteTime = cpu_to_le64(time);
3978 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3979 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3980 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3981 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3982 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3983 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3984 posix_info->DosAttributes =
3985 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3986 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3987 if (d_info->hide_dot_file && d_info->name[0] == '.')
3988 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3989 /*
3990 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3991 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3992 * sub_auth(4 * 1(num_subauth)) + RID(4).
3993 */
3994 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3995 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3996 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3997 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3998 memcpy(posix_info->name, conv_name, conv_len);
3999 posix_info->name_len = cpu_to_le32(conv_len);
4000 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
4001 break;
4002 }
4003
4004 } /* switch (info_level) */
4005
4006 d_info->last_entry_offset = d_info->data_count;
4007 d_info->data_count += next_entry_offset;
4008 d_info->out_buf_len -= next_entry_offset;
4009 d_info->wptr += next_entry_offset;
4010
4011 ksmbd_debug(SMB,
4012 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4013 info_level, d_info->out_buf_len,
4014 next_entry_offset, d_info->data_count);
4015
4016 free_conv_name:
4017 kfree(conv_name);
4018 return rc;
4019 }
4020
4021 struct smb2_query_dir_private {
4022 struct ksmbd_work *work;
4023 char *search_pattern;
4024 struct ksmbd_file *dir_fp;
4025
4026 struct ksmbd_dir_info *d_info;
4027 int info_level;
4028 };
4029
lock_dir(struct ksmbd_file * dir_fp)4030 static void lock_dir(struct ksmbd_file *dir_fp)
4031 {
4032 struct dentry *dir = dir_fp->filp->f_path.dentry;
4033
4034 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4035 }
4036
unlock_dir(struct ksmbd_file * dir_fp)4037 static void unlock_dir(struct ksmbd_file *dir_fp)
4038 {
4039 struct dentry *dir = dir_fp->filp->f_path.dentry;
4040
4041 inode_unlock(d_inode(dir));
4042 }
4043
process_query_dir_entries(struct smb2_query_dir_private * priv)4044 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4045 {
4046 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
4047 struct kstat kstat;
4048 struct ksmbd_kstat ksmbd_kstat;
4049 int rc;
4050 int i;
4051
4052 for (i = 0; i < priv->d_info->num_entry; i++) {
4053 struct dentry *dent;
4054
4055 if (dentry_name(priv->d_info, priv->info_level))
4056 return -EINVAL;
4057
4058 lock_dir(priv->dir_fp);
4059 dent = lookup_one(idmap, priv->d_info->name,
4060 priv->dir_fp->filp->f_path.dentry,
4061 priv->d_info->name_len);
4062 unlock_dir(priv->dir_fp);
4063
4064 if (IS_ERR(dent)) {
4065 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4066 priv->d_info->name,
4067 PTR_ERR(dent));
4068 continue;
4069 }
4070 if (unlikely(d_is_negative(dent))) {
4071 dput(dent);
4072 ksmbd_debug(SMB, "Negative dentry `%s'\n",
4073 priv->d_info->name);
4074 continue;
4075 }
4076
4077 ksmbd_kstat.kstat = &kstat;
4078 if (priv->info_level != FILE_NAMES_INFORMATION) {
4079 rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4080 idmap,
4081 dent,
4082 &ksmbd_kstat);
4083 if (rc) {
4084 dput(dent);
4085 continue;
4086 }
4087 }
4088
4089 rc = smb2_populate_readdir_entry(priv->work->conn,
4090 priv->info_level,
4091 priv->d_info,
4092 &ksmbd_kstat);
4093 dput(dent);
4094 if (rc)
4095 return rc;
4096 }
4097 return 0;
4098 }
4099
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)4100 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4101 int info_level)
4102 {
4103 int struct_sz;
4104 int conv_len;
4105 int next_entry_offset;
4106
4107 struct_sz = readdir_info_level_struct_sz(info_level);
4108 if (struct_sz == -EOPNOTSUPP)
4109 return -EOPNOTSUPP;
4110
4111 conv_len = (d_info->name_len + 1) * 2;
4112 next_entry_offset = ALIGN(struct_sz + conv_len,
4113 KSMBD_DIR_INFO_ALIGNMENT);
4114
4115 if (next_entry_offset > d_info->out_buf_len) {
4116 d_info->out_buf_len = 0;
4117 return -ENOSPC;
4118 }
4119
4120 switch (info_level) {
4121 case FILE_FULL_DIRECTORY_INFORMATION:
4122 {
4123 struct file_full_directory_info *ffdinfo;
4124
4125 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4126 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4127 ffdinfo->FileName[d_info->name_len] = 0x00;
4128 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4129 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4130 break;
4131 }
4132 case FILE_BOTH_DIRECTORY_INFORMATION:
4133 {
4134 struct file_both_directory_info *fbdinfo;
4135
4136 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4137 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4138 fbdinfo->FileName[d_info->name_len] = 0x00;
4139 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4140 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4141 break;
4142 }
4143 case FILE_DIRECTORY_INFORMATION:
4144 {
4145 struct file_directory_info *fdinfo;
4146
4147 fdinfo = (struct file_directory_info *)d_info->wptr;
4148 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4149 fdinfo->FileName[d_info->name_len] = 0x00;
4150 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4151 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4152 break;
4153 }
4154 case FILE_NAMES_INFORMATION:
4155 {
4156 struct file_names_info *fninfo;
4157
4158 fninfo = (struct file_names_info *)d_info->wptr;
4159 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4160 fninfo->FileName[d_info->name_len] = 0x00;
4161 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4162 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4163 break;
4164 }
4165 case FILEID_FULL_DIRECTORY_INFORMATION:
4166 {
4167 struct file_id_full_dir_info *dinfo;
4168
4169 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4170 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4171 dinfo->FileName[d_info->name_len] = 0x00;
4172 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4173 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4174 break;
4175 }
4176 case FILEID_BOTH_DIRECTORY_INFORMATION:
4177 {
4178 struct file_id_both_directory_info *fibdinfo;
4179
4180 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4181 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4182 fibdinfo->FileName[d_info->name_len] = 0x00;
4183 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4184 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4185 break;
4186 }
4187 case SMB_FIND_FILE_POSIX_INFO:
4188 {
4189 struct smb2_posix_info *posix_info;
4190
4191 posix_info = (struct smb2_posix_info *)d_info->wptr;
4192 memcpy(posix_info->name, d_info->name, d_info->name_len);
4193 posix_info->name[d_info->name_len] = 0x00;
4194 posix_info->name_len = cpu_to_le32(d_info->name_len);
4195 posix_info->NextEntryOffset =
4196 cpu_to_le32(next_entry_offset);
4197 break;
4198 }
4199 } /* switch (info_level) */
4200
4201 d_info->num_entry++;
4202 d_info->out_buf_len -= next_entry_offset;
4203 d_info->wptr += next_entry_offset;
4204 return 0;
4205 }
4206
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)4207 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4208 loff_t offset, u64 ino, unsigned int d_type)
4209 {
4210 struct ksmbd_readdir_data *buf;
4211 struct smb2_query_dir_private *priv;
4212 struct ksmbd_dir_info *d_info;
4213 int rc;
4214
4215 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
4216 priv = buf->private;
4217 d_info = priv->d_info;
4218
4219 /* dot and dotdot entries are already reserved */
4220 if (!strcmp(".", name) || !strcmp("..", name))
4221 return true;
4222 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4223 return true;
4224 if (!match_pattern(name, namlen, priv->search_pattern))
4225 return true;
4226
4227 d_info->name = name;
4228 d_info->name_len = namlen;
4229 rc = reserve_populate_dentry(d_info, priv->info_level);
4230 if (rc)
4231 return false;
4232 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4233 d_info->out_buf_len = 0;
4234 return true;
4235 }
4236
verify_info_level(int info_level)4237 static int verify_info_level(int info_level)
4238 {
4239 switch (info_level) {
4240 case FILE_FULL_DIRECTORY_INFORMATION:
4241 case FILE_BOTH_DIRECTORY_INFORMATION:
4242 case FILE_DIRECTORY_INFORMATION:
4243 case FILE_NAMES_INFORMATION:
4244 case FILEID_FULL_DIRECTORY_INFORMATION:
4245 case FILEID_BOTH_DIRECTORY_INFORMATION:
4246 case SMB_FIND_FILE_POSIX_INFO:
4247 break;
4248 default:
4249 return -EOPNOTSUPP;
4250 }
4251
4252 return 0;
4253 }
4254
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4255 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4256 {
4257 int free_len;
4258
4259 free_len = (int)(work->response_sz -
4260 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4261 return free_len;
4262 }
4263
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4264 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4265 unsigned short hdr2_len,
4266 unsigned int out_buf_len)
4267 {
4268 int free_len;
4269
4270 if (out_buf_len > work->conn->vals->max_trans_size)
4271 return -EINVAL;
4272
4273 free_len = smb2_resp_buf_len(work, hdr2_len);
4274 if (free_len < 0)
4275 return -EINVAL;
4276
4277 return min_t(int, out_buf_len, free_len);
4278 }
4279
smb2_query_dir(struct ksmbd_work * work)4280 int smb2_query_dir(struct ksmbd_work *work)
4281 {
4282 struct ksmbd_conn *conn = work->conn;
4283 struct smb2_query_directory_req *req;
4284 struct smb2_query_directory_rsp *rsp;
4285 struct ksmbd_share_config *share = work->tcon->share_conf;
4286 struct ksmbd_file *dir_fp = NULL;
4287 struct ksmbd_dir_info d_info;
4288 int rc = 0;
4289 char *srch_ptr = NULL;
4290 unsigned char srch_flag;
4291 int buffer_sz;
4292 struct smb2_query_dir_private query_dir_private = {NULL, };
4293
4294 WORK_BUFFERS(work, req, rsp);
4295
4296 if (ksmbd_override_fsids(work)) {
4297 rsp->hdr.Status = STATUS_NO_MEMORY;
4298 smb2_set_err_rsp(work);
4299 return -ENOMEM;
4300 }
4301
4302 rc = verify_info_level(req->FileInformationClass);
4303 if (rc) {
4304 rc = -EFAULT;
4305 goto err_out2;
4306 }
4307
4308 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4309 if (!dir_fp) {
4310 rc = -EBADF;
4311 goto err_out2;
4312 }
4313
4314 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4315 inode_permission(file_mnt_idmap(dir_fp->filp),
4316 file_inode(dir_fp->filp),
4317 MAY_READ | MAY_EXEC)) {
4318 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4319 rc = -EACCES;
4320 goto err_out2;
4321 }
4322
4323 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4324 pr_err("can't do query dir for a file\n");
4325 rc = -EINVAL;
4326 goto err_out2;
4327 }
4328
4329 srch_flag = req->Flags;
4330 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4331 le16_to_cpu(req->FileNameLength), 1,
4332 conn->local_nls);
4333 if (IS_ERR(srch_ptr)) {
4334 ksmbd_debug(SMB, "Search Pattern not found\n");
4335 rc = -EINVAL;
4336 goto err_out2;
4337 } else {
4338 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4339 }
4340
4341 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4342 ksmbd_debug(SMB, "Restart directory scan\n");
4343 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4344 }
4345
4346 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4347 d_info.wptr = (char *)rsp->Buffer;
4348 d_info.rptr = (char *)rsp->Buffer;
4349 d_info.out_buf_len =
4350 smb2_calc_max_out_buf_len(work, 8,
4351 le32_to_cpu(req->OutputBufferLength));
4352 if (d_info.out_buf_len < 0) {
4353 rc = -EINVAL;
4354 goto err_out;
4355 }
4356 d_info.flags = srch_flag;
4357
4358 /*
4359 * reserve dot and dotdot entries in head of buffer
4360 * in first response
4361 */
4362 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4363 dir_fp, &d_info, srch_ptr,
4364 smb2_populate_readdir_entry);
4365 if (rc == -ENOSPC)
4366 rc = 0;
4367 else if (rc)
4368 goto err_out;
4369
4370 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4371 d_info.hide_dot_file = true;
4372
4373 buffer_sz = d_info.out_buf_len;
4374 d_info.rptr = d_info.wptr;
4375 query_dir_private.work = work;
4376 query_dir_private.search_pattern = srch_ptr;
4377 query_dir_private.dir_fp = dir_fp;
4378 query_dir_private.d_info = &d_info;
4379 query_dir_private.info_level = req->FileInformationClass;
4380 dir_fp->readdir_data.private = &query_dir_private;
4381 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4382
4383 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4384 /*
4385 * req->OutputBufferLength is too small to contain even one entry.
4386 * In this case, it immediately returns OutputBufferLength 0 to client.
4387 */
4388 if (!d_info.out_buf_len && !d_info.num_entry)
4389 goto no_buf_len;
4390 if (rc > 0 || rc == -ENOSPC)
4391 rc = 0;
4392 else if (rc)
4393 goto err_out;
4394
4395 d_info.wptr = d_info.rptr;
4396 d_info.out_buf_len = buffer_sz;
4397 rc = process_query_dir_entries(&query_dir_private);
4398 if (rc)
4399 goto err_out;
4400
4401 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4402 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4403 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4404 } else {
4405 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4406 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4407 }
4408 rsp->StructureSize = cpu_to_le16(9);
4409 rsp->OutputBufferOffset = cpu_to_le16(0);
4410 rsp->OutputBufferLength = cpu_to_le32(0);
4411 rsp->Buffer[0] = 0;
4412 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4413 offsetof(struct smb2_query_directory_rsp, Buffer)
4414 + 1);
4415 if (rc)
4416 goto err_out;
4417 } else {
4418 no_buf_len:
4419 ((struct file_directory_info *)
4420 ((char *)rsp->Buffer + d_info.last_entry_offset))
4421 ->NextEntryOffset = 0;
4422 if (d_info.data_count >= d_info.last_entry_off_align)
4423 d_info.data_count -= d_info.last_entry_off_align;
4424
4425 rsp->StructureSize = cpu_to_le16(9);
4426 rsp->OutputBufferOffset = cpu_to_le16(72);
4427 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4428 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4429 offsetof(struct smb2_query_directory_rsp, Buffer) +
4430 d_info.data_count);
4431 if (rc)
4432 goto err_out;
4433 }
4434
4435 kfree(srch_ptr);
4436 ksmbd_fd_put(work, dir_fp);
4437 ksmbd_revert_fsids(work);
4438 return 0;
4439
4440 err_out:
4441 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4442 kfree(srch_ptr);
4443
4444 err_out2:
4445 if (rc == -EINVAL)
4446 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4447 else if (rc == -EACCES)
4448 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4449 else if (rc == -ENOENT)
4450 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4451 else if (rc == -EBADF)
4452 rsp->hdr.Status = STATUS_FILE_CLOSED;
4453 else if (rc == -ENOMEM)
4454 rsp->hdr.Status = STATUS_NO_MEMORY;
4455 else if (rc == -EFAULT)
4456 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4457 else if (rc == -EIO)
4458 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4459 if (!rsp->hdr.Status)
4460 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4461
4462 smb2_set_err_rsp(work);
4463 ksmbd_fd_put(work, dir_fp);
4464 ksmbd_revert_fsids(work);
4465 return 0;
4466 }
4467
4468 /**
4469 * buffer_check_err() - helper function to check buffer errors
4470 * @reqOutputBufferLength: max buffer length expected in command response
4471 * @rsp: query info response buffer contains output buffer length
4472 * @rsp_org: base response buffer pointer in case of chained response
4473 *
4474 * Return: 0 on success, otherwise error
4475 */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4476 static int buffer_check_err(int reqOutputBufferLength,
4477 struct smb2_query_info_rsp *rsp,
4478 void *rsp_org)
4479 {
4480 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4481 pr_err("Invalid Buffer Size Requested\n");
4482 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4483 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4484 return -EINVAL;
4485 }
4486 return 0;
4487 }
4488
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4489 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4490 void *rsp_org)
4491 {
4492 struct smb2_file_standard_info *sinfo;
4493
4494 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4495
4496 sinfo->AllocationSize = cpu_to_le64(4096);
4497 sinfo->EndOfFile = cpu_to_le64(0);
4498 sinfo->NumberOfLinks = cpu_to_le32(1);
4499 sinfo->DeletePending = 1;
4500 sinfo->Directory = 0;
4501 rsp->OutputBufferLength =
4502 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4503 }
4504
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4505 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4506 void *rsp_org)
4507 {
4508 struct smb2_file_internal_info *file_info;
4509
4510 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4511
4512 /* any unique number */
4513 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4514 rsp->OutputBufferLength =
4515 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4516 }
4517
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4518 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4519 struct smb2_query_info_req *req,
4520 struct smb2_query_info_rsp *rsp,
4521 void *rsp_org)
4522 {
4523 u64 id;
4524 int rc;
4525
4526 /*
4527 * Windows can sometime send query file info request on
4528 * pipe without opening it, checking error condition here
4529 */
4530 id = req->VolatileFileId;
4531 if (!ksmbd_session_rpc_method(sess, id))
4532 return -ENOENT;
4533
4534 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4535 req->FileInfoClass, req->VolatileFileId);
4536
4537 switch (req->FileInfoClass) {
4538 case FILE_STANDARD_INFORMATION:
4539 get_standard_info_pipe(rsp, rsp_org);
4540 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4541 rsp, rsp_org);
4542 break;
4543 case FILE_INTERNAL_INFORMATION:
4544 get_internal_info_pipe(rsp, id, rsp_org);
4545 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4546 rsp, rsp_org);
4547 break;
4548 default:
4549 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4550 req->FileInfoClass);
4551 rc = -EOPNOTSUPP;
4552 }
4553 return rc;
4554 }
4555
4556 /**
4557 * smb2_get_ea() - handler for smb2 get extended attribute command
4558 * @work: smb work containing query info command buffer
4559 * @fp: ksmbd_file pointer
4560 * @req: get extended attribute request
4561 * @rsp: response buffer pointer
4562 * @rsp_org: base response buffer pointer in case of chained response
4563 *
4564 * Return: 0 on success, otherwise error
4565 */
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)4566 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4567 struct smb2_query_info_req *req,
4568 struct smb2_query_info_rsp *rsp, void *rsp_org)
4569 {
4570 struct smb2_ea_info *eainfo, *prev_eainfo;
4571 char *name, *ptr, *xattr_list = NULL, *buf;
4572 int rc, name_len, value_len, xattr_list_len, idx;
4573 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4574 struct smb2_ea_info_req *ea_req = NULL;
4575 const struct path *path;
4576 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4577
4578 if (!(fp->daccess & FILE_READ_EA_LE)) {
4579 pr_err("Not permitted to read ext attr : 0x%x\n",
4580 fp->daccess);
4581 return -EACCES;
4582 }
4583
4584 path = &fp->filp->f_path;
4585 /* single EA entry is requested with given user.* name */
4586 if (req->InputBufferLength) {
4587 if (le32_to_cpu(req->InputBufferLength) <
4588 sizeof(struct smb2_ea_info_req))
4589 return -EINVAL;
4590
4591 ea_req = (struct smb2_ea_info_req *)((char *)req +
4592 le16_to_cpu(req->InputBufferOffset));
4593 } else {
4594 /* need to send all EAs, if no specific EA is requested*/
4595 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4596 ksmbd_debug(SMB,
4597 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4598 le32_to_cpu(req->Flags));
4599 }
4600
4601 buf_free_len =
4602 smb2_calc_max_out_buf_len(work, 8,
4603 le32_to_cpu(req->OutputBufferLength));
4604 if (buf_free_len < 0)
4605 return -EINVAL;
4606
4607 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4608 if (rc < 0) {
4609 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4610 goto out;
4611 } else if (!rc) { /* there is no EA in the file */
4612 ksmbd_debug(SMB, "no ea data in the file\n");
4613 goto done;
4614 }
4615 xattr_list_len = rc;
4616
4617 ptr = (char *)rsp->Buffer;
4618 eainfo = (struct smb2_ea_info *)ptr;
4619 prev_eainfo = eainfo;
4620 idx = 0;
4621
4622 while (idx < xattr_list_len) {
4623 name = xattr_list + idx;
4624 name_len = strlen(name);
4625
4626 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4627 idx += name_len + 1;
4628
4629 /*
4630 * CIFS does not support EA other than user.* namespace,
4631 * still keep the framework generic, to list other attrs
4632 * in future.
4633 */
4634 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4635 continue;
4636
4637 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4638 STREAM_PREFIX_LEN))
4639 continue;
4640
4641 if (req->InputBufferLength &&
4642 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4643 ea_req->EaNameLength))
4644 continue;
4645
4646 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4647 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4648 continue;
4649
4650 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4651 name_len -= XATTR_USER_PREFIX_LEN;
4652
4653 ptr = eainfo->name + name_len + 1;
4654 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4655 name_len + 1);
4656 /* bailout if xattr can't fit in buf_free_len */
4657 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4658 name, &buf);
4659 if (value_len <= 0) {
4660 rc = -ENOENT;
4661 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4662 goto out;
4663 }
4664
4665 buf_free_len -= value_len;
4666 if (buf_free_len < 0) {
4667 kfree(buf);
4668 break;
4669 }
4670
4671 memcpy(ptr, buf, value_len);
4672 kfree(buf);
4673
4674 ptr += value_len;
4675 eainfo->Flags = 0;
4676 eainfo->EaNameLength = name_len;
4677
4678 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4679 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4680 name_len);
4681 else
4682 memcpy(eainfo->name, name, name_len);
4683
4684 eainfo->name[name_len] = '\0';
4685 eainfo->EaValueLength = cpu_to_le16(value_len);
4686 next_offset = offsetof(struct smb2_ea_info, name) +
4687 name_len + 1 + value_len;
4688
4689 /* align next xattr entry at 4 byte bundary */
4690 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4691 if (alignment_bytes) {
4692 memset(ptr, '\0', alignment_bytes);
4693 ptr += alignment_bytes;
4694 next_offset += alignment_bytes;
4695 buf_free_len -= alignment_bytes;
4696 }
4697 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4698 prev_eainfo = eainfo;
4699 eainfo = (struct smb2_ea_info *)ptr;
4700 rsp_data_cnt += next_offset;
4701
4702 if (req->InputBufferLength) {
4703 ksmbd_debug(SMB, "single entry requested\n");
4704 break;
4705 }
4706 }
4707
4708 /* no more ea entries */
4709 prev_eainfo->NextEntryOffset = 0;
4710 done:
4711 rc = 0;
4712 if (rsp_data_cnt == 0)
4713 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4714 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4715 out:
4716 kvfree(xattr_list);
4717 return rc;
4718 }
4719
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4720 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4721 struct ksmbd_file *fp, void *rsp_org)
4722 {
4723 struct smb2_file_access_info *file_info;
4724
4725 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4726 file_info->AccessFlags = fp->daccess;
4727 rsp->OutputBufferLength =
4728 cpu_to_le32(sizeof(struct smb2_file_access_info));
4729 }
4730
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4731 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4732 struct ksmbd_file *fp, void *rsp_org)
4733 {
4734 struct smb2_file_basic_info *basic_info;
4735 struct kstat stat;
4736 u64 time;
4737 int ret;
4738
4739 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4740 pr_err("no right to read the attributes : 0x%x\n",
4741 fp->daccess);
4742 return -EACCES;
4743 }
4744
4745 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4746 AT_STATX_SYNC_AS_STAT);
4747 if (ret)
4748 return ret;
4749
4750 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4751 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4752 time = ksmbd_UnixTimeToNT(stat.atime);
4753 basic_info->LastAccessTime = cpu_to_le64(time);
4754 time = ksmbd_UnixTimeToNT(stat.mtime);
4755 basic_info->LastWriteTime = cpu_to_le64(time);
4756 time = ksmbd_UnixTimeToNT(stat.ctime);
4757 basic_info->ChangeTime = cpu_to_le64(time);
4758 basic_info->Attributes = fp->f_ci->m_fattr;
4759 basic_info->Pad1 = 0;
4760 rsp->OutputBufferLength =
4761 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4762 return 0;
4763 }
4764
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4765 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4766 struct ksmbd_file *fp, void *rsp_org)
4767 {
4768 struct smb2_file_standard_info *sinfo;
4769 unsigned int delete_pending;
4770 struct kstat stat;
4771 int ret;
4772
4773 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4774 AT_STATX_SYNC_AS_STAT);
4775 if (ret)
4776 return ret;
4777
4778 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4779 delete_pending = ksmbd_inode_pending_delete(fp);
4780
4781 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4782 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4783 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4784 sinfo->DeletePending = delete_pending;
4785 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4786 rsp->OutputBufferLength =
4787 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4788
4789 return 0;
4790 }
4791
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4792 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4793 void *rsp_org)
4794 {
4795 struct smb2_file_alignment_info *file_info;
4796
4797 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4798 file_info->AlignmentRequirement = 0;
4799 rsp->OutputBufferLength =
4800 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4801 }
4802
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4803 static int get_file_all_info(struct ksmbd_work *work,
4804 struct smb2_query_info_rsp *rsp,
4805 struct ksmbd_file *fp,
4806 void *rsp_org)
4807 {
4808 struct ksmbd_conn *conn = work->conn;
4809 struct smb2_file_all_info *file_info;
4810 unsigned int delete_pending;
4811 struct kstat stat;
4812 int conv_len;
4813 char *filename;
4814 u64 time;
4815 int ret;
4816
4817 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4818 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4819 fp->daccess);
4820 return -EACCES;
4821 }
4822
4823 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4824 if (IS_ERR(filename))
4825 return PTR_ERR(filename);
4826
4827 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4828 AT_STATX_SYNC_AS_STAT);
4829 if (ret)
4830 return ret;
4831
4832 ksmbd_debug(SMB, "filename = %s\n", filename);
4833 delete_pending = ksmbd_inode_pending_delete(fp);
4834 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4835
4836 file_info->CreationTime = cpu_to_le64(fp->create_time);
4837 time = ksmbd_UnixTimeToNT(stat.atime);
4838 file_info->LastAccessTime = cpu_to_le64(time);
4839 time = ksmbd_UnixTimeToNT(stat.mtime);
4840 file_info->LastWriteTime = cpu_to_le64(time);
4841 time = ksmbd_UnixTimeToNT(stat.ctime);
4842 file_info->ChangeTime = cpu_to_le64(time);
4843 file_info->Attributes = fp->f_ci->m_fattr;
4844 file_info->Pad1 = 0;
4845 file_info->AllocationSize =
4846 cpu_to_le64(stat.blocks << 9);
4847 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4848 file_info->NumberOfLinks =
4849 cpu_to_le32(get_nlink(&stat) - delete_pending);
4850 file_info->DeletePending = delete_pending;
4851 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4852 file_info->Pad2 = 0;
4853 file_info->IndexNumber = cpu_to_le64(stat.ino);
4854 file_info->EASize = 0;
4855 file_info->AccessFlags = fp->daccess;
4856 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4857 file_info->Mode = fp->coption;
4858 file_info->AlignmentRequirement = 0;
4859 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4860 PATH_MAX, conn->local_nls, 0);
4861 conv_len *= 2;
4862 file_info->FileNameLength = cpu_to_le32(conv_len);
4863 rsp->OutputBufferLength =
4864 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4865 kfree(filename);
4866 return 0;
4867 }
4868
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4869 static void get_file_alternate_info(struct ksmbd_work *work,
4870 struct smb2_query_info_rsp *rsp,
4871 struct ksmbd_file *fp,
4872 void *rsp_org)
4873 {
4874 struct ksmbd_conn *conn = work->conn;
4875 struct smb2_file_alt_name_info *file_info;
4876 struct dentry *dentry = fp->filp->f_path.dentry;
4877 int conv_len;
4878
4879 spin_lock(&dentry->d_lock);
4880 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4881 conv_len = ksmbd_extract_shortname(conn,
4882 dentry->d_name.name,
4883 file_info->FileName);
4884 spin_unlock(&dentry->d_lock);
4885 file_info->FileNameLength = cpu_to_le32(conv_len);
4886 rsp->OutputBufferLength =
4887 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4888 }
4889
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4890 static int get_file_stream_info(struct ksmbd_work *work,
4891 struct smb2_query_info_rsp *rsp,
4892 struct ksmbd_file *fp,
4893 void *rsp_org)
4894 {
4895 struct ksmbd_conn *conn = work->conn;
4896 struct smb2_file_stream_info *file_info;
4897 char *stream_name, *xattr_list = NULL, *stream_buf;
4898 struct kstat stat;
4899 const struct path *path = &fp->filp->f_path;
4900 ssize_t xattr_list_len;
4901 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4902 int buf_free_len;
4903 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4904 int ret;
4905
4906 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4907 AT_STATX_SYNC_AS_STAT);
4908 if (ret)
4909 return ret;
4910
4911 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4912
4913 buf_free_len =
4914 smb2_calc_max_out_buf_len(work, 8,
4915 le32_to_cpu(req->OutputBufferLength));
4916 if (buf_free_len < 0)
4917 goto out;
4918
4919 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4920 if (xattr_list_len < 0) {
4921 goto out;
4922 } else if (!xattr_list_len) {
4923 ksmbd_debug(SMB, "empty xattr in the file\n");
4924 goto out;
4925 }
4926
4927 while (idx < xattr_list_len) {
4928 stream_name = xattr_list + idx;
4929 streamlen = strlen(stream_name);
4930 idx += streamlen + 1;
4931
4932 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4933
4934 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4935 STREAM_PREFIX, STREAM_PREFIX_LEN))
4936 continue;
4937
4938 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4939 STREAM_PREFIX_LEN);
4940 streamlen = stream_name_len;
4941
4942 /* plus : size */
4943 streamlen += 1;
4944 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4945 if (!stream_buf)
4946 break;
4947
4948 streamlen = snprintf(stream_buf, streamlen + 1,
4949 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4950
4951 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4952 if (next > buf_free_len) {
4953 kfree(stream_buf);
4954 break;
4955 }
4956
4957 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4958 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4959 stream_buf, streamlen,
4960 conn->local_nls, 0);
4961 streamlen *= 2;
4962 kfree(stream_buf);
4963 file_info->StreamNameLength = cpu_to_le32(streamlen);
4964 file_info->StreamSize = cpu_to_le64(stream_name_len);
4965 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4966
4967 nbytes += next;
4968 buf_free_len -= next;
4969 file_info->NextEntryOffset = cpu_to_le32(next);
4970 }
4971
4972 out:
4973 if (!S_ISDIR(stat.mode) &&
4974 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4975 file_info = (struct smb2_file_stream_info *)
4976 &rsp->Buffer[nbytes];
4977 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4978 "::$DATA", 7, conn->local_nls, 0);
4979 streamlen *= 2;
4980 file_info->StreamNameLength = cpu_to_le32(streamlen);
4981 file_info->StreamSize = cpu_to_le64(stat.size);
4982 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4983 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4984 }
4985
4986 /* last entry offset should be 0 */
4987 file_info->NextEntryOffset = 0;
4988 kvfree(xattr_list);
4989
4990 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4991
4992 return 0;
4993 }
4994
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4995 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
4996 struct ksmbd_file *fp, void *rsp_org)
4997 {
4998 struct smb2_file_internal_info *file_info;
4999 struct kstat stat;
5000 int ret;
5001
5002 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5003 AT_STATX_SYNC_AS_STAT);
5004 if (ret)
5005 return ret;
5006
5007 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
5008 file_info->IndexNumber = cpu_to_le64(stat.ino);
5009 rsp->OutputBufferLength =
5010 cpu_to_le32(sizeof(struct smb2_file_internal_info));
5011
5012 return 0;
5013 }
5014
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5015 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5016 struct ksmbd_file *fp, void *rsp_org)
5017 {
5018 struct smb2_file_ntwrk_info *file_info;
5019 struct kstat stat;
5020 u64 time;
5021 int ret;
5022
5023 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5024 pr_err("no right to read the attributes : 0x%x\n",
5025 fp->daccess);
5026 return -EACCES;
5027 }
5028
5029 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5030 AT_STATX_SYNC_AS_STAT);
5031 if (ret)
5032 return ret;
5033
5034 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5035
5036 file_info->CreationTime = cpu_to_le64(fp->create_time);
5037 time = ksmbd_UnixTimeToNT(stat.atime);
5038 file_info->LastAccessTime = cpu_to_le64(time);
5039 time = ksmbd_UnixTimeToNT(stat.mtime);
5040 file_info->LastWriteTime = cpu_to_le64(time);
5041 time = ksmbd_UnixTimeToNT(stat.ctime);
5042 file_info->ChangeTime = cpu_to_le64(time);
5043 file_info->Attributes = fp->f_ci->m_fattr;
5044 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5045 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5046 file_info->Reserved = cpu_to_le32(0);
5047 rsp->OutputBufferLength =
5048 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5049 return 0;
5050 }
5051
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)5052 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5053 {
5054 struct smb2_file_ea_info *file_info;
5055
5056 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5057 file_info->EASize = 0;
5058 rsp->OutputBufferLength =
5059 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5060 }
5061
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5062 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5063 struct ksmbd_file *fp, void *rsp_org)
5064 {
5065 struct smb2_file_pos_info *file_info;
5066
5067 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5068 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5069 rsp->OutputBufferLength =
5070 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5071 }
5072
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5073 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5074 struct ksmbd_file *fp, void *rsp_org)
5075 {
5076 struct smb2_file_mode_info *file_info;
5077
5078 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5079 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5080 rsp->OutputBufferLength =
5081 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5082 }
5083
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5084 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5085 struct ksmbd_file *fp, void *rsp_org)
5086 {
5087 struct smb2_file_comp_info *file_info;
5088 struct kstat stat;
5089 int ret;
5090
5091 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5092 AT_STATX_SYNC_AS_STAT);
5093 if (ret)
5094 return ret;
5095
5096 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5097 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5098 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5099 file_info->CompressionUnitShift = 0;
5100 file_info->ChunkShift = 0;
5101 file_info->ClusterShift = 0;
5102 memset(&file_info->Reserved[0], 0, 3);
5103
5104 rsp->OutputBufferLength =
5105 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5106
5107 return 0;
5108 }
5109
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5110 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5111 struct ksmbd_file *fp, void *rsp_org)
5112 {
5113 struct smb2_file_attr_tag_info *file_info;
5114
5115 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5116 pr_err("no right to read the attributes : 0x%x\n",
5117 fp->daccess);
5118 return -EACCES;
5119 }
5120
5121 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5122 file_info->FileAttributes = fp->f_ci->m_fattr;
5123 file_info->ReparseTag = 0;
5124 rsp->OutputBufferLength =
5125 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5126 return 0;
5127 }
5128
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5129 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5130 struct ksmbd_file *fp, void *rsp_org)
5131 {
5132 struct smb311_posix_qinfo *file_info;
5133 struct inode *inode = file_inode(fp->filp);
5134 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5135 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5136 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5137 struct kstat stat;
5138 u64 time;
5139 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5140 int ret;
5141
5142 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5143 AT_STATX_SYNC_AS_STAT);
5144 if (ret)
5145 return ret;
5146
5147 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5148 file_info->CreationTime = cpu_to_le64(fp->create_time);
5149 time = ksmbd_UnixTimeToNT(stat.atime);
5150 file_info->LastAccessTime = cpu_to_le64(time);
5151 time = ksmbd_UnixTimeToNT(stat.mtime);
5152 file_info->LastWriteTime = cpu_to_le64(time);
5153 time = ksmbd_UnixTimeToNT(stat.ctime);
5154 file_info->ChangeTime = cpu_to_le64(time);
5155 file_info->DosAttributes = fp->f_ci->m_fattr;
5156 file_info->Inode = cpu_to_le64(stat.ino);
5157 file_info->EndOfFile = cpu_to_le64(stat.size);
5158 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5159 file_info->HardLinks = cpu_to_le32(stat.nlink);
5160 file_info->Mode = cpu_to_le32(stat.mode & 0777);
5161 file_info->DeviceId = cpu_to_le32(stat.rdev);
5162
5163 /*
5164 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5165 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5166 * sub_auth(4 * 1(num_subauth)) + RID(4).
5167 */
5168 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5169 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5170 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5171 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5172
5173 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5174
5175 return 0;
5176 }
5177
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5178 static int smb2_get_info_file(struct ksmbd_work *work,
5179 struct smb2_query_info_req *req,
5180 struct smb2_query_info_rsp *rsp)
5181 {
5182 struct ksmbd_file *fp;
5183 int fileinfoclass = 0;
5184 int rc = 0;
5185 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5186
5187 if (test_share_config_flag(work->tcon->share_conf,
5188 KSMBD_SHARE_FLAG_PIPE)) {
5189 /* smb2 info file called for pipe */
5190 return smb2_get_info_file_pipe(work->sess, req, rsp,
5191 work->response_buf);
5192 }
5193
5194 if (work->next_smb2_rcv_hdr_off) {
5195 if (!has_file_id(req->VolatileFileId)) {
5196 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5197 work->compound_fid);
5198 id = work->compound_fid;
5199 pid = work->compound_pfid;
5200 }
5201 }
5202
5203 if (!has_file_id(id)) {
5204 id = req->VolatileFileId;
5205 pid = req->PersistentFileId;
5206 }
5207
5208 fp = ksmbd_lookup_fd_slow(work, id, pid);
5209 if (!fp)
5210 return -ENOENT;
5211
5212 fileinfoclass = req->FileInfoClass;
5213
5214 switch (fileinfoclass) {
5215 case FILE_ACCESS_INFORMATION:
5216 get_file_access_info(rsp, fp, work->response_buf);
5217 break;
5218
5219 case FILE_BASIC_INFORMATION:
5220 rc = get_file_basic_info(rsp, fp, work->response_buf);
5221 break;
5222
5223 case FILE_STANDARD_INFORMATION:
5224 rc = get_file_standard_info(rsp, fp, work->response_buf);
5225 break;
5226
5227 case FILE_ALIGNMENT_INFORMATION:
5228 get_file_alignment_info(rsp, work->response_buf);
5229 break;
5230
5231 case FILE_ALL_INFORMATION:
5232 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5233 break;
5234
5235 case FILE_ALTERNATE_NAME_INFORMATION:
5236 get_file_alternate_info(work, rsp, fp, work->response_buf);
5237 break;
5238
5239 case FILE_STREAM_INFORMATION:
5240 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5241 break;
5242
5243 case FILE_INTERNAL_INFORMATION:
5244 rc = get_file_internal_info(rsp, fp, work->response_buf);
5245 break;
5246
5247 case FILE_NETWORK_OPEN_INFORMATION:
5248 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5249 break;
5250
5251 case FILE_EA_INFORMATION:
5252 get_file_ea_info(rsp, work->response_buf);
5253 break;
5254
5255 case FILE_FULL_EA_INFORMATION:
5256 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5257 break;
5258
5259 case FILE_POSITION_INFORMATION:
5260 get_file_position_info(rsp, fp, work->response_buf);
5261 break;
5262
5263 case FILE_MODE_INFORMATION:
5264 get_file_mode_info(rsp, fp, work->response_buf);
5265 break;
5266
5267 case FILE_COMPRESSION_INFORMATION:
5268 rc = get_file_compression_info(rsp, fp, work->response_buf);
5269 break;
5270
5271 case FILE_ATTRIBUTE_TAG_INFORMATION:
5272 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5273 break;
5274 case SMB_FIND_FILE_POSIX_INFO:
5275 if (!work->tcon->posix_extensions) {
5276 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5277 rc = -EOPNOTSUPP;
5278 } else {
5279 rc = find_file_posix_info(rsp, fp, work->response_buf);
5280 }
5281 break;
5282 default:
5283 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5284 fileinfoclass);
5285 rc = -EOPNOTSUPP;
5286 }
5287 if (!rc)
5288 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5289 rsp, work->response_buf);
5290 ksmbd_fd_put(work, fp);
5291 return rc;
5292 }
5293
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5294 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5295 struct smb2_query_info_req *req,
5296 struct smb2_query_info_rsp *rsp)
5297 {
5298 struct ksmbd_session *sess = work->sess;
5299 struct ksmbd_conn *conn = work->conn;
5300 struct ksmbd_share_config *share = work->tcon->share_conf;
5301 int fsinfoclass = 0;
5302 struct kstatfs stfs;
5303 struct path path;
5304 int rc = 0, len;
5305
5306 if (!share->path)
5307 return -EIO;
5308
5309 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5310 if (rc) {
5311 pr_err("cannot create vfs path\n");
5312 return -EIO;
5313 }
5314
5315 rc = vfs_statfs(&path, &stfs);
5316 if (rc) {
5317 pr_err("cannot do stat of path %s\n", share->path);
5318 path_put(&path);
5319 return -EIO;
5320 }
5321
5322 fsinfoclass = req->FileInfoClass;
5323
5324 switch (fsinfoclass) {
5325 case FS_DEVICE_INFORMATION:
5326 {
5327 struct filesystem_device_info *info;
5328
5329 info = (struct filesystem_device_info *)rsp->Buffer;
5330
5331 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);
5332 info->DeviceCharacteristics =
5333 cpu_to_le32(FILE_DEVICE_IS_MOUNTED);
5334 if (!test_tree_conn_flag(work->tcon,
5335 KSMBD_TREE_CONN_FLAG_WRITABLE))
5336 info->DeviceCharacteristics |=
5337 cpu_to_le32(FILE_READ_ONLY_DEVICE);
5338 rsp->OutputBufferLength = cpu_to_le32(8);
5339 break;
5340 }
5341 case FS_ATTRIBUTE_INFORMATION:
5342 {
5343 struct filesystem_attribute_info *info;
5344 size_t sz;
5345
5346 info = (struct filesystem_attribute_info *)rsp->Buffer;
5347 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5348 FILE_PERSISTENT_ACLS |
5349 FILE_UNICODE_ON_DISK |
5350 FILE_CASE_PRESERVED_NAMES |
5351 FILE_CASE_SENSITIVE_SEARCH |
5352 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5353
5354 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5355
5356 if (test_share_config_flag(work->tcon->share_conf,
5357 KSMBD_SHARE_FLAG_STREAMS))
5358 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5359
5360 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5361 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5362 "NTFS", PATH_MAX, conn->local_nls, 0);
5363 len = len * 2;
5364 info->FileSystemNameLen = cpu_to_le32(len);
5365 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5366 rsp->OutputBufferLength = cpu_to_le32(sz);
5367 break;
5368 }
5369 case FS_VOLUME_INFORMATION:
5370 {
5371 struct filesystem_vol_info *info;
5372 size_t sz;
5373 unsigned int serial_crc = 0;
5374
5375 info = (struct filesystem_vol_info *)(rsp->Buffer);
5376 info->VolumeCreationTime = 0;
5377 serial_crc = crc32_le(serial_crc, share->name,
5378 strlen(share->name));
5379 serial_crc = crc32_le(serial_crc, share->path,
5380 strlen(share->path));
5381 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5382 strlen(ksmbd_netbios_name()));
5383 /* Taking dummy value of serial number*/
5384 info->SerialNumber = cpu_to_le32(serial_crc);
5385 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5386 share->name, PATH_MAX,
5387 conn->local_nls, 0);
5388 len = len * 2;
5389 info->VolumeLabelSize = cpu_to_le32(len);
5390 info->Reserved = 0;
5391 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5392 rsp->OutputBufferLength = cpu_to_le32(sz);
5393 break;
5394 }
5395 case FS_SIZE_INFORMATION:
5396 {
5397 struct filesystem_info *info;
5398
5399 info = (struct filesystem_info *)(rsp->Buffer);
5400 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5401 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5402 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5403 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5404 rsp->OutputBufferLength = cpu_to_le32(24);
5405 break;
5406 }
5407 case FS_FULL_SIZE_INFORMATION:
5408 {
5409 struct smb2_fs_full_size_info *info;
5410
5411 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5412 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5413 info->CallerAvailableAllocationUnits =
5414 cpu_to_le64(stfs.f_bavail);
5415 info->ActualAvailableAllocationUnits =
5416 cpu_to_le64(stfs.f_bfree);
5417 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5418 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5419 rsp->OutputBufferLength = cpu_to_le32(32);
5420 break;
5421 }
5422 case FS_OBJECT_ID_INFORMATION:
5423 {
5424 struct object_id_info *info;
5425
5426 info = (struct object_id_info *)(rsp->Buffer);
5427
5428 if (!user_guest(sess->user))
5429 memcpy(info->objid, user_passkey(sess->user), 16);
5430 else
5431 memset(info->objid, 0, 16);
5432
5433 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5434 info->extended_info.version = cpu_to_le32(1);
5435 info->extended_info.release = cpu_to_le32(1);
5436 info->extended_info.rel_date = 0;
5437 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5438 rsp->OutputBufferLength = cpu_to_le32(64);
5439 break;
5440 }
5441 case FS_SECTOR_SIZE_INFORMATION:
5442 {
5443 struct smb3_fs_ss_info *info;
5444 unsigned int sector_size =
5445 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5446
5447 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5448
5449 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5450 info->PhysicalBytesPerSectorForAtomicity =
5451 cpu_to_le32(sector_size);
5452 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5453 info->FSEffPhysicalBytesPerSectorForAtomicity =
5454 cpu_to_le32(sector_size);
5455 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5456 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5457 info->ByteOffsetForSectorAlignment = 0;
5458 info->ByteOffsetForPartitionAlignment = 0;
5459 rsp->OutputBufferLength = cpu_to_le32(28);
5460 break;
5461 }
5462 case FS_CONTROL_INFORMATION:
5463 {
5464 /*
5465 * TODO : The current implementation is based on
5466 * test result with win7(NTFS) server. It's need to
5467 * modify this to get valid Quota values
5468 * from Linux kernel
5469 */
5470 struct smb2_fs_control_info *info;
5471
5472 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5473 info->FreeSpaceStartFiltering = 0;
5474 info->FreeSpaceThreshold = 0;
5475 info->FreeSpaceStopFiltering = 0;
5476 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5477 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5478 info->Padding = 0;
5479 rsp->OutputBufferLength = cpu_to_le32(48);
5480 break;
5481 }
5482 case FS_POSIX_INFORMATION:
5483 {
5484 struct filesystem_posix_info *info;
5485
5486 if (!work->tcon->posix_extensions) {
5487 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5488 rc = -EOPNOTSUPP;
5489 } else {
5490 info = (struct filesystem_posix_info *)(rsp->Buffer);
5491 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5492 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5493 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5494 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5495 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5496 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5497 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5498 rsp->OutputBufferLength = cpu_to_le32(56);
5499 }
5500 break;
5501 }
5502 default:
5503 path_put(&path);
5504 return -EOPNOTSUPP;
5505 }
5506 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5507 rsp, work->response_buf);
5508 path_put(&path);
5509 return rc;
5510 }
5511
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5512 static int smb2_get_info_sec(struct ksmbd_work *work,
5513 struct smb2_query_info_req *req,
5514 struct smb2_query_info_rsp *rsp)
5515 {
5516 struct ksmbd_file *fp;
5517 struct mnt_idmap *idmap;
5518 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5519 struct smb_fattr fattr = {{0}};
5520 struct inode *inode;
5521 __u32 secdesclen = 0;
5522 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5523 int addition_info = le32_to_cpu(req->AdditionalInformation);
5524 int rc = 0, ppntsd_size = 0;
5525
5526 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5527 PROTECTED_DACL_SECINFO |
5528 UNPROTECTED_DACL_SECINFO)) {
5529 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5530 addition_info);
5531
5532 pntsd->revision = cpu_to_le16(1);
5533 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5534 pntsd->osidoffset = 0;
5535 pntsd->gsidoffset = 0;
5536 pntsd->sacloffset = 0;
5537 pntsd->dacloffset = 0;
5538
5539 secdesclen = sizeof(struct smb_ntsd);
5540 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5541
5542 return 0;
5543 }
5544
5545 if (work->next_smb2_rcv_hdr_off) {
5546 if (!has_file_id(req->VolatileFileId)) {
5547 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5548 work->compound_fid);
5549 id = work->compound_fid;
5550 pid = work->compound_pfid;
5551 }
5552 }
5553
5554 if (!has_file_id(id)) {
5555 id = req->VolatileFileId;
5556 pid = req->PersistentFileId;
5557 }
5558
5559 fp = ksmbd_lookup_fd_slow(work, id, pid);
5560 if (!fp)
5561 return -ENOENT;
5562
5563 idmap = file_mnt_idmap(fp->filp);
5564 inode = file_inode(fp->filp);
5565 ksmbd_acls_fattr(&fattr, idmap, inode);
5566
5567 if (test_share_config_flag(work->tcon->share_conf,
5568 KSMBD_SHARE_FLAG_ACL_XATTR))
5569 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5570 fp->filp->f_path.dentry,
5571 &ppntsd);
5572
5573 /* Check if sd buffer size exceeds response buffer size */
5574 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5575 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5576 addition_info, &secdesclen, &fattr);
5577 posix_acl_release(fattr.cf_acls);
5578 posix_acl_release(fattr.cf_dacls);
5579 kfree(ppntsd);
5580 ksmbd_fd_put(work, fp);
5581 if (rc)
5582 return rc;
5583
5584 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5585 return 0;
5586 }
5587
5588 /**
5589 * smb2_query_info() - handler for smb2 query info command
5590 * @work: smb work containing query info request buffer
5591 *
5592 * Return: 0 on success, otherwise error
5593 */
smb2_query_info(struct ksmbd_work * work)5594 int smb2_query_info(struct ksmbd_work *work)
5595 {
5596 struct smb2_query_info_req *req;
5597 struct smb2_query_info_rsp *rsp;
5598 int rc = 0;
5599
5600 WORK_BUFFERS(work, req, rsp);
5601
5602 ksmbd_debug(SMB, "GOT query info request\n");
5603
5604 switch (req->InfoType) {
5605 case SMB2_O_INFO_FILE:
5606 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5607 rc = smb2_get_info_file(work, req, rsp);
5608 break;
5609 case SMB2_O_INFO_FILESYSTEM:
5610 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5611 rc = smb2_get_info_filesystem(work, req, rsp);
5612 break;
5613 case SMB2_O_INFO_SECURITY:
5614 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5615 rc = smb2_get_info_sec(work, req, rsp);
5616 break;
5617 default:
5618 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5619 req->InfoType);
5620 rc = -EOPNOTSUPP;
5621 }
5622
5623 if (!rc) {
5624 rsp->StructureSize = cpu_to_le16(9);
5625 rsp->OutputBufferOffset = cpu_to_le16(72);
5626 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5627 offsetof(struct smb2_query_info_rsp, Buffer) +
5628 le32_to_cpu(rsp->OutputBufferLength));
5629 }
5630
5631 if (rc < 0) {
5632 if (rc == -EACCES)
5633 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5634 else if (rc == -ENOENT)
5635 rsp->hdr.Status = STATUS_FILE_CLOSED;
5636 else if (rc == -EIO)
5637 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5638 else if (rc == -ENOMEM)
5639 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5640 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5641 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5642 smb2_set_err_rsp(work);
5643
5644 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5645 rc);
5646 return rc;
5647 }
5648 return 0;
5649 }
5650
5651 /**
5652 * smb2_close_pipe() - handler for closing IPC pipe
5653 * @work: smb work containing close request buffer
5654 *
5655 * Return: 0
5656 */
smb2_close_pipe(struct ksmbd_work * work)5657 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5658 {
5659 u64 id;
5660 struct smb2_close_req *req;
5661 struct smb2_close_rsp *rsp;
5662
5663 WORK_BUFFERS(work, req, rsp);
5664
5665 id = req->VolatileFileId;
5666 ksmbd_session_rpc_close(work->sess, id);
5667
5668 rsp->StructureSize = cpu_to_le16(60);
5669 rsp->Flags = 0;
5670 rsp->Reserved = 0;
5671 rsp->CreationTime = 0;
5672 rsp->LastAccessTime = 0;
5673 rsp->LastWriteTime = 0;
5674 rsp->ChangeTime = 0;
5675 rsp->AllocationSize = 0;
5676 rsp->EndOfFile = 0;
5677 rsp->Attributes = 0;
5678
5679 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5680 sizeof(struct smb2_close_rsp));
5681 }
5682
5683 /**
5684 * smb2_close() - handler for smb2 close file command
5685 * @work: smb work containing close request buffer
5686 *
5687 * Return: 0
5688 */
smb2_close(struct ksmbd_work * work)5689 int smb2_close(struct ksmbd_work *work)
5690 {
5691 u64 volatile_id = KSMBD_NO_FID;
5692 u64 sess_id;
5693 struct smb2_close_req *req;
5694 struct smb2_close_rsp *rsp;
5695 struct ksmbd_conn *conn = work->conn;
5696 struct ksmbd_file *fp;
5697 u64 time;
5698 int err = 0;
5699
5700 WORK_BUFFERS(work, req, rsp);
5701
5702 if (test_share_config_flag(work->tcon->share_conf,
5703 KSMBD_SHARE_FLAG_PIPE)) {
5704 ksmbd_debug(SMB, "IPC pipe close request\n");
5705 return smb2_close_pipe(work);
5706 }
5707
5708 sess_id = le64_to_cpu(req->hdr.SessionId);
5709 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5710 sess_id = work->compound_sid;
5711
5712 work->compound_sid = 0;
5713 if (check_session_id(conn, sess_id)) {
5714 work->compound_sid = sess_id;
5715 } else {
5716 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5717 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5718 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5719 err = -EBADF;
5720 goto out;
5721 }
5722
5723 if (work->next_smb2_rcv_hdr_off &&
5724 !has_file_id(req->VolatileFileId)) {
5725 if (!has_file_id(work->compound_fid)) {
5726 /* file already closed, return FILE_CLOSED */
5727 ksmbd_debug(SMB, "file already closed\n");
5728 rsp->hdr.Status = STATUS_FILE_CLOSED;
5729 err = -EBADF;
5730 goto out;
5731 } else {
5732 ksmbd_debug(SMB,
5733 "Compound request set FID = %llu:%llu\n",
5734 work->compound_fid,
5735 work->compound_pfid);
5736 volatile_id = work->compound_fid;
5737
5738 /* file closed, stored id is not valid anymore */
5739 work->compound_fid = KSMBD_NO_FID;
5740 work->compound_pfid = KSMBD_NO_FID;
5741 }
5742 } else {
5743 volatile_id = req->VolatileFileId;
5744 }
5745 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5746
5747 rsp->StructureSize = cpu_to_le16(60);
5748 rsp->Reserved = 0;
5749
5750 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5751 struct kstat stat;
5752 int ret;
5753
5754 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5755 if (!fp) {
5756 err = -ENOENT;
5757 goto out;
5758 }
5759
5760 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5761 AT_STATX_SYNC_AS_STAT);
5762 if (ret) {
5763 ksmbd_fd_put(work, fp);
5764 goto out;
5765 }
5766
5767 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5768 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5769 cpu_to_le64(stat.blocks << 9);
5770 rsp->EndOfFile = cpu_to_le64(stat.size);
5771 rsp->Attributes = fp->f_ci->m_fattr;
5772 rsp->CreationTime = cpu_to_le64(fp->create_time);
5773 time = ksmbd_UnixTimeToNT(stat.atime);
5774 rsp->LastAccessTime = cpu_to_le64(time);
5775 time = ksmbd_UnixTimeToNT(stat.mtime);
5776 rsp->LastWriteTime = cpu_to_le64(time);
5777 time = ksmbd_UnixTimeToNT(stat.ctime);
5778 rsp->ChangeTime = cpu_to_le64(time);
5779 ksmbd_fd_put(work, fp);
5780 } else {
5781 rsp->Flags = 0;
5782 rsp->AllocationSize = 0;
5783 rsp->EndOfFile = 0;
5784 rsp->Attributes = 0;
5785 rsp->CreationTime = 0;
5786 rsp->LastAccessTime = 0;
5787 rsp->LastWriteTime = 0;
5788 rsp->ChangeTime = 0;
5789 }
5790
5791 err = ksmbd_close_fd(work, volatile_id);
5792 out:
5793 if (!err)
5794 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5795 sizeof(struct smb2_close_rsp));
5796
5797 if (err) {
5798 if (rsp->hdr.Status == 0)
5799 rsp->hdr.Status = STATUS_FILE_CLOSED;
5800 smb2_set_err_rsp(work);
5801 }
5802
5803 return err;
5804 }
5805
5806 /**
5807 * smb2_echo() - handler for smb2 echo(ping) command
5808 * @work: smb work containing echo request buffer
5809 *
5810 * Return: 0
5811 */
smb2_echo(struct ksmbd_work * work)5812 int smb2_echo(struct ksmbd_work *work)
5813 {
5814 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5815
5816 if (work->next_smb2_rcv_hdr_off)
5817 rsp = ksmbd_resp_buf_next(work);
5818
5819 rsp->StructureSize = cpu_to_le16(4);
5820 rsp->Reserved = 0;
5821 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5822 }
5823
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5824 static int smb2_rename(struct ksmbd_work *work,
5825 struct ksmbd_file *fp,
5826 struct smb2_file_rename_info *file_info,
5827 struct nls_table *local_nls)
5828 {
5829 struct ksmbd_share_config *share = fp->tcon->share_conf;
5830 char *new_name = NULL;
5831 int rc, flags = 0;
5832
5833 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5834 new_name = smb2_get_name(file_info->FileName,
5835 le32_to_cpu(file_info->FileNameLength),
5836 local_nls);
5837 if (IS_ERR(new_name))
5838 return PTR_ERR(new_name);
5839
5840 if (strchr(new_name, ':')) {
5841 int s_type;
5842 char *xattr_stream_name, *stream_name = NULL;
5843 size_t xattr_stream_size;
5844 int len;
5845
5846 rc = parse_stream_name(new_name, &stream_name, &s_type);
5847 if (rc < 0)
5848 goto out;
5849
5850 len = strlen(new_name);
5851 if (len > 0 && new_name[len - 1] != '/') {
5852 pr_err("not allow base filename in rename\n");
5853 rc = -ESHARE;
5854 goto out;
5855 }
5856
5857 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5858 &xattr_stream_name,
5859 &xattr_stream_size,
5860 s_type);
5861 if (rc)
5862 goto out;
5863
5864 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5865 &fp->filp->f_path,
5866 xattr_stream_name,
5867 NULL, 0, 0, true);
5868 if (rc < 0) {
5869 pr_err("failed to store stream name in xattr: %d\n",
5870 rc);
5871 rc = -EINVAL;
5872 goto out;
5873 }
5874
5875 goto out;
5876 }
5877
5878 ksmbd_debug(SMB, "new name %s\n", new_name);
5879 if (ksmbd_share_veto_filename(share, new_name)) {
5880 rc = -ENOENT;
5881 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5882 goto out;
5883 }
5884
5885 if (!file_info->ReplaceIfExists)
5886 flags = RENAME_NOREPLACE;
5887
5888 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5889 if (!rc)
5890 smb_break_all_levII_oplock(work, fp, 0);
5891 out:
5892 kfree(new_name);
5893 return rc;
5894 }
5895
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)5896 static int smb2_create_link(struct ksmbd_work *work,
5897 struct ksmbd_share_config *share,
5898 struct smb2_file_link_info *file_info,
5899 unsigned int buf_len, struct file *filp,
5900 struct nls_table *local_nls)
5901 {
5902 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5903 struct path path, parent_path;
5904 bool file_present = false;
5905 int rc;
5906
5907 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5908 le32_to_cpu(file_info->FileNameLength))
5909 return -EINVAL;
5910
5911 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5912 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5913 if (!pathname)
5914 return -ENOMEM;
5915
5916 link_name = smb2_get_name(file_info->FileName,
5917 le32_to_cpu(file_info->FileNameLength),
5918 local_nls);
5919 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5920 rc = -EINVAL;
5921 goto out;
5922 }
5923
5924 ksmbd_debug(SMB, "link name is %s\n", link_name);
5925 target_name = file_path(filp, pathname, PATH_MAX);
5926 if (IS_ERR(target_name)) {
5927 rc = -EINVAL;
5928 goto out;
5929 }
5930
5931 ksmbd_debug(SMB, "target name is %s\n", target_name);
5932 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5933 &parent_path, &path, 0);
5934 if (rc) {
5935 if (rc != -ENOENT)
5936 goto out;
5937 } else
5938 file_present = true;
5939
5940 if (file_info->ReplaceIfExists) {
5941 if (file_present) {
5942 rc = ksmbd_vfs_remove_file(work, &path);
5943 if (rc) {
5944 rc = -EINVAL;
5945 ksmbd_debug(SMB, "cannot delete %s\n",
5946 link_name);
5947 goto out;
5948 }
5949 }
5950 } else {
5951 if (file_present) {
5952 rc = -EEXIST;
5953 ksmbd_debug(SMB, "link already exists\n");
5954 goto out;
5955 }
5956 }
5957
5958 rc = ksmbd_vfs_link(work, target_name, link_name);
5959 if (rc)
5960 rc = -EINVAL;
5961 out:
5962 if (file_present)
5963 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5964
5965 if (!IS_ERR(link_name))
5966 kfree(link_name);
5967 kfree(pathname);
5968 return rc;
5969 }
5970
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)5971 static int set_file_basic_info(struct ksmbd_file *fp,
5972 struct smb2_file_basic_info *file_info,
5973 struct ksmbd_share_config *share)
5974 {
5975 struct iattr attrs;
5976 struct file *filp;
5977 struct inode *inode;
5978 struct mnt_idmap *idmap;
5979 int rc = 0;
5980
5981 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5982 return -EACCES;
5983
5984 attrs.ia_valid = 0;
5985 filp = fp->filp;
5986 inode = file_inode(filp);
5987 idmap = file_mnt_idmap(filp);
5988
5989 if (file_info->CreationTime)
5990 fp->create_time = le64_to_cpu(file_info->CreationTime);
5991
5992 if (file_info->LastAccessTime) {
5993 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5994 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5995 }
5996
5997 attrs.ia_valid |= ATTR_CTIME;
5998 if (file_info->ChangeTime)
5999 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
6000 else
6001 attrs.ia_ctime = inode_get_ctime(inode);
6002
6003 if (file_info->LastWriteTime) {
6004 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
6005 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
6006 }
6007
6008 if (file_info->Attributes) {
6009 if (!S_ISDIR(inode->i_mode) &&
6010 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
6011 pr_err("can't change a file to a directory\n");
6012 return -EINVAL;
6013 }
6014
6015 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
6016 fp->f_ci->m_fattr = file_info->Attributes |
6017 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6018 }
6019
6020 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6021 (file_info->CreationTime || file_info->Attributes)) {
6022 struct xattr_dos_attrib da = {0};
6023
6024 da.version = 4;
6025 da.itime = fp->itime;
6026 da.create_time = fp->create_time;
6027 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6028 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6029 XATTR_DOSINFO_ITIME;
6030
6031 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6032 true);
6033 if (rc)
6034 ksmbd_debug(SMB,
6035 "failed to restore file attribute in EA\n");
6036 rc = 0;
6037 }
6038
6039 if (attrs.ia_valid) {
6040 struct dentry *dentry = filp->f_path.dentry;
6041 struct inode *inode = d_inode(dentry);
6042
6043 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6044 return -EACCES;
6045
6046 inode_lock(inode);
6047 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
6048 attrs.ia_valid &= ~ATTR_CTIME;
6049 rc = notify_change(idmap, dentry, &attrs, NULL);
6050 inode_unlock(inode);
6051 }
6052 return rc;
6053 }
6054
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)6055 static int set_file_allocation_info(struct ksmbd_work *work,
6056 struct ksmbd_file *fp,
6057 struct smb2_file_alloc_info *file_alloc_info)
6058 {
6059 /*
6060 * TODO : It's working fine only when store dos attributes
6061 * is not yes. need to implement a logic which works
6062 * properly with any smb.conf option
6063 */
6064
6065 loff_t alloc_blks;
6066 struct inode *inode;
6067 struct kstat stat;
6068 int rc;
6069
6070 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6071 return -EACCES;
6072
6073 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6074 AT_STATX_SYNC_AS_STAT);
6075 if (rc)
6076 return rc;
6077
6078 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6079 inode = file_inode(fp->filp);
6080
6081 if (alloc_blks > stat.blocks) {
6082 smb_break_all_levII_oplock(work, fp, 1);
6083 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6084 alloc_blks * 512);
6085 if (rc && rc != -EOPNOTSUPP) {
6086 pr_err("vfs_fallocate is failed : %d\n", rc);
6087 return rc;
6088 }
6089 } else if (alloc_blks < stat.blocks) {
6090 loff_t size;
6091
6092 /*
6093 * Allocation size could be smaller than original one
6094 * which means allocated blocks in file should be
6095 * deallocated. use truncate to cut out it, but inode
6096 * size is also updated with truncate offset.
6097 * inode size is retained by backup inode size.
6098 */
6099 size = i_size_read(inode);
6100 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6101 if (rc) {
6102 pr_err("truncate failed!, err %d\n", rc);
6103 return rc;
6104 }
6105 if (size < alloc_blks * 512)
6106 i_size_write(inode, size);
6107 }
6108 return 0;
6109 }
6110
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)6111 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6112 struct smb2_file_eof_info *file_eof_info)
6113 {
6114 loff_t newsize;
6115 struct inode *inode;
6116 int rc;
6117
6118 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6119 return -EACCES;
6120
6121 newsize = le64_to_cpu(file_eof_info->EndOfFile);
6122 inode = file_inode(fp->filp);
6123
6124 /*
6125 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6126 * on FAT32 shared device, truncate execution time is too long
6127 * and network error could cause from windows client. because
6128 * truncate of some filesystem like FAT32 fill zero data in
6129 * truncated range.
6130 */
6131 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6132 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6133 rc = ksmbd_vfs_truncate(work, fp, newsize);
6134 if (rc) {
6135 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6136 if (rc != -EAGAIN)
6137 rc = -EBADF;
6138 return rc;
6139 }
6140 }
6141 return 0;
6142 }
6143
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)6144 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6145 struct smb2_file_rename_info *rename_info,
6146 unsigned int buf_len)
6147 {
6148 if (!(fp->daccess & FILE_DELETE_LE)) {
6149 pr_err("no right to delete : 0x%x\n", fp->daccess);
6150 return -EACCES;
6151 }
6152
6153 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6154 le32_to_cpu(rename_info->FileNameLength))
6155 return -EINVAL;
6156
6157 if (!le32_to_cpu(rename_info->FileNameLength))
6158 return -EINVAL;
6159
6160 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6161 }
6162
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)6163 static int set_file_disposition_info(struct ksmbd_file *fp,
6164 struct smb2_file_disposition_info *file_info)
6165 {
6166 struct inode *inode;
6167
6168 if (!(fp->daccess & FILE_DELETE_LE)) {
6169 pr_err("no right to delete : 0x%x\n", fp->daccess);
6170 return -EACCES;
6171 }
6172
6173 inode = file_inode(fp->filp);
6174 if (file_info->DeletePending) {
6175 if (S_ISDIR(inode->i_mode) &&
6176 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6177 return -EBUSY;
6178 ksmbd_set_inode_pending_delete(fp);
6179 } else {
6180 ksmbd_clear_inode_pending_delete(fp);
6181 }
6182 return 0;
6183 }
6184
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)6185 static int set_file_position_info(struct ksmbd_file *fp,
6186 struct smb2_file_pos_info *file_info)
6187 {
6188 loff_t current_byte_offset;
6189 unsigned long sector_size;
6190 struct inode *inode;
6191
6192 inode = file_inode(fp->filp);
6193 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6194 sector_size = inode->i_sb->s_blocksize;
6195
6196 if (current_byte_offset < 0 ||
6197 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6198 current_byte_offset & (sector_size - 1))) {
6199 pr_err("CurrentByteOffset is not valid : %llu\n",
6200 current_byte_offset);
6201 return -EINVAL;
6202 }
6203
6204 fp->filp->f_pos = current_byte_offset;
6205 return 0;
6206 }
6207
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)6208 static int set_file_mode_info(struct ksmbd_file *fp,
6209 struct smb2_file_mode_info *file_info)
6210 {
6211 __le32 mode;
6212
6213 mode = file_info->Mode;
6214
6215 if ((mode & ~FILE_MODE_INFO_MASK)) {
6216 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6217 return -EINVAL;
6218 }
6219
6220 /*
6221 * TODO : need to implement consideration for
6222 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6223 */
6224 ksmbd_vfs_set_fadvise(fp->filp, mode);
6225 fp->coption = mode;
6226 return 0;
6227 }
6228
6229 /**
6230 * smb2_set_info_file() - handler for smb2 set info command
6231 * @work: smb work containing set info command buffer
6232 * @fp: ksmbd_file pointer
6233 * @req: request buffer pointer
6234 * @share: ksmbd_share_config pointer
6235 *
6236 * Return: 0 on success, otherwise error
6237 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6238 */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)6239 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6240 struct smb2_set_info_req *req,
6241 struct ksmbd_share_config *share)
6242 {
6243 unsigned int buf_len = le32_to_cpu(req->BufferLength);
6244 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6245
6246 switch (req->FileInfoClass) {
6247 case FILE_BASIC_INFORMATION:
6248 {
6249 if (buf_len < sizeof(struct smb2_file_basic_info))
6250 return -EINVAL;
6251
6252 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6253 }
6254 case FILE_ALLOCATION_INFORMATION:
6255 {
6256 if (buf_len < sizeof(struct smb2_file_alloc_info))
6257 return -EINVAL;
6258
6259 return set_file_allocation_info(work, fp,
6260 (struct smb2_file_alloc_info *)buffer);
6261 }
6262 case FILE_END_OF_FILE_INFORMATION:
6263 {
6264 if (buf_len < sizeof(struct smb2_file_eof_info))
6265 return -EINVAL;
6266
6267 return set_end_of_file_info(work, fp,
6268 (struct smb2_file_eof_info *)buffer);
6269 }
6270 case FILE_RENAME_INFORMATION:
6271 {
6272 if (buf_len < sizeof(struct smb2_file_rename_info))
6273 return -EINVAL;
6274
6275 return set_rename_info(work, fp,
6276 (struct smb2_file_rename_info *)buffer,
6277 buf_len);
6278 }
6279 case FILE_LINK_INFORMATION:
6280 {
6281 if (buf_len < sizeof(struct smb2_file_link_info))
6282 return -EINVAL;
6283
6284 return smb2_create_link(work, work->tcon->share_conf,
6285 (struct smb2_file_link_info *)buffer,
6286 buf_len, fp->filp,
6287 work->conn->local_nls);
6288 }
6289 case FILE_DISPOSITION_INFORMATION:
6290 {
6291 if (buf_len < sizeof(struct smb2_file_disposition_info))
6292 return -EINVAL;
6293
6294 return set_file_disposition_info(fp,
6295 (struct smb2_file_disposition_info *)buffer);
6296 }
6297 case FILE_FULL_EA_INFORMATION:
6298 {
6299 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6300 pr_err("Not permitted to write ext attr: 0x%x\n",
6301 fp->daccess);
6302 return -EACCES;
6303 }
6304
6305 if (buf_len < sizeof(struct smb2_ea_info))
6306 return -EINVAL;
6307
6308 return smb2_set_ea((struct smb2_ea_info *)buffer,
6309 buf_len, &fp->filp->f_path, true);
6310 }
6311 case FILE_POSITION_INFORMATION:
6312 {
6313 if (buf_len < sizeof(struct smb2_file_pos_info))
6314 return -EINVAL;
6315
6316 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6317 }
6318 case FILE_MODE_INFORMATION:
6319 {
6320 if (buf_len < sizeof(struct smb2_file_mode_info))
6321 return -EINVAL;
6322
6323 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6324 }
6325 }
6326
6327 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6328 return -EOPNOTSUPP;
6329 }
6330
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6331 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6332 char *buffer, int buf_len)
6333 {
6334 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6335
6336 fp->saccess |= FILE_SHARE_DELETE_LE;
6337
6338 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6339 buf_len, false, true);
6340 }
6341
6342 /**
6343 * smb2_set_info() - handler for smb2 set info command handler
6344 * @work: smb work containing set info request buffer
6345 *
6346 * Return: 0 on success, otherwise error
6347 */
smb2_set_info(struct ksmbd_work * work)6348 int smb2_set_info(struct ksmbd_work *work)
6349 {
6350 struct smb2_set_info_req *req;
6351 struct smb2_set_info_rsp *rsp;
6352 struct ksmbd_file *fp = NULL;
6353 int rc = 0;
6354 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6355
6356 ksmbd_debug(SMB, "Received set info request\n");
6357
6358 if (work->next_smb2_rcv_hdr_off) {
6359 req = ksmbd_req_buf_next(work);
6360 rsp = ksmbd_resp_buf_next(work);
6361 if (!has_file_id(req->VolatileFileId)) {
6362 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6363 work->compound_fid);
6364 id = work->compound_fid;
6365 pid = work->compound_pfid;
6366 }
6367 } else {
6368 req = smb2_get_msg(work->request_buf);
6369 rsp = smb2_get_msg(work->response_buf);
6370 }
6371
6372 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6373 ksmbd_debug(SMB, "User does not have write permission\n");
6374 pr_err("User does not have write permission\n");
6375 rc = -EACCES;
6376 goto err_out;
6377 }
6378
6379 if (!has_file_id(id)) {
6380 id = req->VolatileFileId;
6381 pid = req->PersistentFileId;
6382 }
6383
6384 fp = ksmbd_lookup_fd_slow(work, id, pid);
6385 if (!fp) {
6386 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6387 rc = -ENOENT;
6388 goto err_out;
6389 }
6390
6391 switch (req->InfoType) {
6392 case SMB2_O_INFO_FILE:
6393 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6394 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6395 break;
6396 case SMB2_O_INFO_SECURITY:
6397 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6398 if (ksmbd_override_fsids(work)) {
6399 rc = -ENOMEM;
6400 goto err_out;
6401 }
6402 rc = smb2_set_info_sec(fp,
6403 le32_to_cpu(req->AdditionalInformation),
6404 (char *)req + le16_to_cpu(req->BufferOffset),
6405 le32_to_cpu(req->BufferLength));
6406 ksmbd_revert_fsids(work);
6407 break;
6408 default:
6409 rc = -EOPNOTSUPP;
6410 }
6411
6412 if (rc < 0)
6413 goto err_out;
6414
6415 rsp->StructureSize = cpu_to_le16(2);
6416 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6417 sizeof(struct smb2_set_info_rsp));
6418 if (rc)
6419 goto err_out;
6420 ksmbd_fd_put(work, fp);
6421 return 0;
6422
6423 err_out:
6424 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6425 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6426 else if (rc == -EINVAL)
6427 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6428 else if (rc == -ESHARE)
6429 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6430 else if (rc == -ENOENT)
6431 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6432 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6433 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6434 else if (rc == -EAGAIN)
6435 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6436 else if (rc == -EBADF || rc == -ESTALE)
6437 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6438 else if (rc == -EEXIST)
6439 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6440 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6441 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6442 smb2_set_err_rsp(work);
6443 ksmbd_fd_put(work, fp);
6444 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6445 return rc;
6446 }
6447
6448 /**
6449 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6450 * @work: smb work containing read IPC pipe command buffer
6451 *
6452 * Return: 0 on success, otherwise error
6453 */
smb2_read_pipe(struct ksmbd_work * work)6454 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6455 {
6456 int nbytes = 0, err;
6457 u64 id;
6458 struct ksmbd_rpc_command *rpc_resp;
6459 struct smb2_read_req *req;
6460 struct smb2_read_rsp *rsp;
6461
6462 WORK_BUFFERS(work, req, rsp);
6463
6464 id = req->VolatileFileId;
6465
6466 rpc_resp = ksmbd_rpc_read(work->sess, id);
6467 if (rpc_resp) {
6468 void *aux_payload_buf;
6469
6470 if (rpc_resp->flags != KSMBD_RPC_OK) {
6471 err = -EINVAL;
6472 goto out;
6473 }
6474
6475 aux_payload_buf =
6476 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6477 if (!aux_payload_buf) {
6478 err = -ENOMEM;
6479 goto out;
6480 }
6481
6482 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6483
6484 nbytes = rpc_resp->payload_sz;
6485 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6486 offsetof(struct smb2_read_rsp, Buffer),
6487 aux_payload_buf, nbytes);
6488 if (err) {
6489 kvfree(aux_payload_buf);
6490 goto out;
6491 }
6492 kvfree(rpc_resp);
6493 } else {
6494 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6495 offsetof(struct smb2_read_rsp, Buffer));
6496 if (err)
6497 goto out;
6498 }
6499
6500 rsp->StructureSize = cpu_to_le16(17);
6501 rsp->DataOffset = 80;
6502 rsp->Reserved = 0;
6503 rsp->DataLength = cpu_to_le32(nbytes);
6504 rsp->DataRemaining = 0;
6505 rsp->Flags = 0;
6506 return 0;
6507
6508 out:
6509 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6510 smb2_set_err_rsp(work);
6511 kvfree(rpc_resp);
6512 return err;
6513 }
6514
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6515 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6516 struct smb2_buffer_desc_v1 *desc,
6517 __le32 Channel,
6518 __le16 ChannelInfoLength)
6519 {
6520 unsigned int i, ch_count;
6521
6522 if (work->conn->dialect == SMB30_PROT_ID &&
6523 Channel != SMB2_CHANNEL_RDMA_V1)
6524 return -EINVAL;
6525
6526 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6527 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6528 for (i = 0; i < ch_count; i++) {
6529 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6530 i,
6531 le32_to_cpu(desc[i].token),
6532 le32_to_cpu(desc[i].length));
6533 }
6534 }
6535 if (!ch_count)
6536 return -EINVAL;
6537
6538 work->need_invalidate_rkey =
6539 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6540 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6541 work->remote_key = le32_to_cpu(desc->token);
6542 return 0;
6543 }
6544
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6545 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6546 struct smb2_read_req *req, void *data_buf,
6547 size_t length)
6548 {
6549 int err;
6550
6551 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6552 (struct smb2_buffer_desc_v1 *)
6553 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6554 le16_to_cpu(req->ReadChannelInfoLength));
6555 if (err)
6556 return err;
6557
6558 return length;
6559 }
6560
6561 /**
6562 * smb2_read() - handler for smb2 read from file
6563 * @work: smb work containing read command buffer
6564 *
6565 * Return: 0 on success, otherwise error
6566 */
smb2_read(struct ksmbd_work * work)6567 int smb2_read(struct ksmbd_work *work)
6568 {
6569 struct ksmbd_conn *conn = work->conn;
6570 struct smb2_read_req *req;
6571 struct smb2_read_rsp *rsp;
6572 struct ksmbd_file *fp = NULL;
6573 loff_t offset;
6574 size_t length, mincount;
6575 ssize_t nbytes = 0, remain_bytes = 0;
6576 int err = 0;
6577 bool is_rdma_channel = false;
6578 unsigned int max_read_size = conn->vals->max_read_size;
6579 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6580 void *aux_payload_buf;
6581
6582 if (test_share_config_flag(work->tcon->share_conf,
6583 KSMBD_SHARE_FLAG_PIPE)) {
6584 ksmbd_debug(SMB, "IPC pipe read request\n");
6585 return smb2_read_pipe(work);
6586 }
6587
6588 if (work->next_smb2_rcv_hdr_off) {
6589 req = ksmbd_req_buf_next(work);
6590 rsp = ksmbd_resp_buf_next(work);
6591 if (!has_file_id(req->VolatileFileId)) {
6592 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6593 work->compound_fid);
6594 id = work->compound_fid;
6595 pid = work->compound_pfid;
6596 }
6597 } else {
6598 req = smb2_get_msg(work->request_buf);
6599 rsp = smb2_get_msg(work->response_buf);
6600 }
6601
6602 if (!has_file_id(id)) {
6603 id = req->VolatileFileId;
6604 pid = req->PersistentFileId;
6605 }
6606
6607 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6608 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6609 is_rdma_channel = true;
6610 max_read_size = get_smbd_max_read_write_size();
6611 }
6612
6613 if (is_rdma_channel == true) {
6614 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6615
6616 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6617 err = -EINVAL;
6618 goto out;
6619 }
6620 err = smb2_set_remote_key_for_rdma(work,
6621 (struct smb2_buffer_desc_v1 *)
6622 ((char *)req + ch_offset),
6623 req->Channel,
6624 req->ReadChannelInfoLength);
6625 if (err)
6626 goto out;
6627 }
6628
6629 fp = ksmbd_lookup_fd_slow(work, id, pid);
6630 if (!fp) {
6631 err = -ENOENT;
6632 goto out;
6633 }
6634
6635 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6636 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6637 err = -EACCES;
6638 goto out;
6639 }
6640
6641 offset = le64_to_cpu(req->Offset);
6642 length = le32_to_cpu(req->Length);
6643 mincount = le32_to_cpu(req->MinimumCount);
6644
6645 if (length > max_read_size) {
6646 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6647 max_read_size);
6648 err = -EINVAL;
6649 goto out;
6650 }
6651
6652 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6653 fp->filp, offset, length);
6654
6655 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6656 if (!aux_payload_buf) {
6657 err = -ENOMEM;
6658 goto out;
6659 }
6660
6661 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6662 if (nbytes < 0) {
6663 err = nbytes;
6664 goto out;
6665 }
6666
6667 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6668 kvfree(aux_payload_buf);
6669 rsp->hdr.Status = STATUS_END_OF_FILE;
6670 smb2_set_err_rsp(work);
6671 ksmbd_fd_put(work, fp);
6672 return 0;
6673 }
6674
6675 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6676 nbytes, offset, mincount);
6677
6678 if (is_rdma_channel == true) {
6679 /* write data to the client using rdma channel */
6680 remain_bytes = smb2_read_rdma_channel(work, req,
6681 aux_payload_buf,
6682 nbytes);
6683 kvfree(aux_payload_buf);
6684 aux_payload_buf = NULL;
6685 nbytes = 0;
6686 if (remain_bytes < 0) {
6687 err = (int)remain_bytes;
6688 goto out;
6689 }
6690 }
6691
6692 rsp->StructureSize = cpu_to_le16(17);
6693 rsp->DataOffset = 80;
6694 rsp->Reserved = 0;
6695 rsp->DataLength = cpu_to_le32(nbytes);
6696 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6697 rsp->Flags = 0;
6698 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6699 offsetof(struct smb2_read_rsp, Buffer),
6700 aux_payload_buf, nbytes);
6701 if (err) {
6702 kvfree(aux_payload_buf);
6703 goto out;
6704 }
6705 ksmbd_fd_put(work, fp);
6706 return 0;
6707
6708 out:
6709 if (err) {
6710 if (err == -EISDIR)
6711 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6712 else if (err == -EAGAIN)
6713 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6714 else if (err == -ENOENT)
6715 rsp->hdr.Status = STATUS_FILE_CLOSED;
6716 else if (err == -EACCES)
6717 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6718 else if (err == -ESHARE)
6719 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6720 else if (err == -EINVAL)
6721 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6722 else
6723 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6724
6725 smb2_set_err_rsp(work);
6726 }
6727 ksmbd_fd_put(work, fp);
6728 return err;
6729 }
6730
6731 /**
6732 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6733 * @work: smb work containing write IPC pipe command buffer
6734 *
6735 * Return: 0 on success, otherwise error
6736 */
smb2_write_pipe(struct ksmbd_work * work)6737 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6738 {
6739 struct smb2_write_req *req;
6740 struct smb2_write_rsp *rsp;
6741 struct ksmbd_rpc_command *rpc_resp;
6742 u64 id = 0;
6743 int err = 0, ret = 0;
6744 char *data_buf;
6745 size_t length;
6746
6747 WORK_BUFFERS(work, req, rsp);
6748
6749 length = le32_to_cpu(req->Length);
6750 id = req->VolatileFileId;
6751
6752 if ((u64)le16_to_cpu(req->DataOffset) + length >
6753 get_rfc1002_len(work->request_buf)) {
6754 pr_err("invalid write data offset %u, smb_len %u\n",
6755 le16_to_cpu(req->DataOffset),
6756 get_rfc1002_len(work->request_buf));
6757 err = -EINVAL;
6758 goto out;
6759 }
6760
6761 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6762 le16_to_cpu(req->DataOffset));
6763
6764 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6765 if (rpc_resp) {
6766 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6767 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6768 kvfree(rpc_resp);
6769 smb2_set_err_rsp(work);
6770 return -EOPNOTSUPP;
6771 }
6772 if (rpc_resp->flags != KSMBD_RPC_OK) {
6773 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6774 smb2_set_err_rsp(work);
6775 kvfree(rpc_resp);
6776 return ret;
6777 }
6778 kvfree(rpc_resp);
6779 }
6780
6781 rsp->StructureSize = cpu_to_le16(17);
6782 rsp->DataOffset = 0;
6783 rsp->Reserved = 0;
6784 rsp->DataLength = cpu_to_le32(length);
6785 rsp->DataRemaining = 0;
6786 rsp->Reserved2 = 0;
6787 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6788 offsetof(struct smb2_write_rsp, Buffer));
6789 out:
6790 if (err) {
6791 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6792 smb2_set_err_rsp(work);
6793 }
6794
6795 return err;
6796 }
6797
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)6798 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6799 struct smb2_write_req *req,
6800 struct ksmbd_file *fp,
6801 loff_t offset, size_t length, bool sync)
6802 {
6803 char *data_buf;
6804 int ret;
6805 ssize_t nbytes;
6806
6807 data_buf = kvzalloc(length, GFP_KERNEL);
6808 if (!data_buf)
6809 return -ENOMEM;
6810
6811 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6812 (struct smb2_buffer_desc_v1 *)
6813 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6814 le16_to_cpu(req->WriteChannelInfoLength));
6815 if (ret < 0) {
6816 kvfree(data_buf);
6817 return ret;
6818 }
6819
6820 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6821 kvfree(data_buf);
6822 if (ret < 0)
6823 return ret;
6824
6825 return nbytes;
6826 }
6827
6828 /**
6829 * smb2_write() - handler for smb2 write from file
6830 * @work: smb work containing write command buffer
6831 *
6832 * Return: 0 on success, otherwise error
6833 */
smb2_write(struct ksmbd_work * work)6834 int smb2_write(struct ksmbd_work *work)
6835 {
6836 struct smb2_write_req *req;
6837 struct smb2_write_rsp *rsp;
6838 struct ksmbd_file *fp = NULL;
6839 loff_t offset;
6840 size_t length;
6841 ssize_t nbytes;
6842 char *data_buf;
6843 bool writethrough = false, is_rdma_channel = false;
6844 int err = 0;
6845 unsigned int max_write_size = work->conn->vals->max_write_size;
6846
6847 WORK_BUFFERS(work, req, rsp);
6848
6849 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6850 ksmbd_debug(SMB, "IPC pipe write request\n");
6851 return smb2_write_pipe(work);
6852 }
6853
6854 offset = le64_to_cpu(req->Offset);
6855 length = le32_to_cpu(req->Length);
6856
6857 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6858 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6859 is_rdma_channel = true;
6860 max_write_size = get_smbd_max_read_write_size();
6861 length = le32_to_cpu(req->RemainingBytes);
6862 }
6863
6864 if (is_rdma_channel == true) {
6865 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6866
6867 if (req->Length != 0 || req->DataOffset != 0 ||
6868 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6869 err = -EINVAL;
6870 goto out;
6871 }
6872 err = smb2_set_remote_key_for_rdma(work,
6873 (struct smb2_buffer_desc_v1 *)
6874 ((char *)req + ch_offset),
6875 req->Channel,
6876 req->WriteChannelInfoLength);
6877 if (err)
6878 goto out;
6879 }
6880
6881 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6882 ksmbd_debug(SMB, "User does not have write permission\n");
6883 err = -EACCES;
6884 goto out;
6885 }
6886
6887 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6888 if (!fp) {
6889 err = -ENOENT;
6890 goto out;
6891 }
6892
6893 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6894 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6895 err = -EACCES;
6896 goto out;
6897 }
6898
6899 if (length > max_write_size) {
6900 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6901 max_write_size);
6902 err = -EINVAL;
6903 goto out;
6904 }
6905
6906 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6907 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6908 writethrough = true;
6909
6910 if (is_rdma_channel == false) {
6911 if (le16_to_cpu(req->DataOffset) <
6912 offsetof(struct smb2_write_req, Buffer)) {
6913 err = -EINVAL;
6914 goto out;
6915 }
6916
6917 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6918 le16_to_cpu(req->DataOffset));
6919
6920 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6921 fp->filp, offset, length);
6922 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6923 writethrough, &nbytes);
6924 if (err < 0)
6925 goto out;
6926 } else {
6927 /* read data from the client using rdma channel, and
6928 * write the data.
6929 */
6930 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6931 writethrough);
6932 if (nbytes < 0) {
6933 err = (int)nbytes;
6934 goto out;
6935 }
6936 }
6937
6938 rsp->StructureSize = cpu_to_le16(17);
6939 rsp->DataOffset = 0;
6940 rsp->Reserved = 0;
6941 rsp->DataLength = cpu_to_le32(nbytes);
6942 rsp->DataRemaining = 0;
6943 rsp->Reserved2 = 0;
6944 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6945 if (err)
6946 goto out;
6947 ksmbd_fd_put(work, fp);
6948 return 0;
6949
6950 out:
6951 if (err == -EAGAIN)
6952 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6953 else if (err == -ENOSPC || err == -EFBIG)
6954 rsp->hdr.Status = STATUS_DISK_FULL;
6955 else if (err == -ENOENT)
6956 rsp->hdr.Status = STATUS_FILE_CLOSED;
6957 else if (err == -EACCES)
6958 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6959 else if (err == -ESHARE)
6960 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6961 else if (err == -EINVAL)
6962 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6963 else
6964 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6965
6966 smb2_set_err_rsp(work);
6967 ksmbd_fd_put(work, fp);
6968 return err;
6969 }
6970
6971 /**
6972 * smb2_flush() - handler for smb2 flush file - fsync
6973 * @work: smb work containing flush command buffer
6974 *
6975 * Return: 0 on success, otherwise error
6976 */
smb2_flush(struct ksmbd_work * work)6977 int smb2_flush(struct ksmbd_work *work)
6978 {
6979 struct smb2_flush_req *req;
6980 struct smb2_flush_rsp *rsp;
6981 int err;
6982
6983 WORK_BUFFERS(work, req, rsp);
6984
6985 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6986
6987 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6988 if (err)
6989 goto out;
6990
6991 rsp->StructureSize = cpu_to_le16(4);
6992 rsp->Reserved = 0;
6993 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6994
6995 out:
6996 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6997 smb2_set_err_rsp(work);
6998 return err;
6999 }
7000
7001 /**
7002 * smb2_cancel() - handler for smb2 cancel command
7003 * @work: smb work containing cancel command buffer
7004 *
7005 * Return: 0 on success, otherwise error
7006 */
smb2_cancel(struct ksmbd_work * work)7007 int smb2_cancel(struct ksmbd_work *work)
7008 {
7009 struct ksmbd_conn *conn = work->conn;
7010 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
7011 struct smb2_hdr *chdr;
7012 struct ksmbd_work *iter;
7013 struct list_head *command_list;
7014
7015 if (work->next_smb2_rcv_hdr_off)
7016 hdr = ksmbd_resp_buf_next(work);
7017
7018 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7019 hdr->MessageId, hdr->Flags);
7020
7021 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7022 command_list = &conn->async_requests;
7023
7024 spin_lock(&conn->request_lock);
7025 list_for_each_entry(iter, command_list,
7026 async_request_entry) {
7027 chdr = smb2_get_msg(iter->request_buf);
7028
7029 if (iter->async_id !=
7030 le64_to_cpu(hdr->Id.AsyncId))
7031 continue;
7032
7033 ksmbd_debug(SMB,
7034 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7035 le64_to_cpu(hdr->Id.AsyncId),
7036 le16_to_cpu(chdr->Command));
7037 iter->state = KSMBD_WORK_CANCELLED;
7038 if (iter->cancel_fn)
7039 iter->cancel_fn(iter->cancel_argv);
7040 break;
7041 }
7042 spin_unlock(&conn->request_lock);
7043 } else {
7044 command_list = &conn->requests;
7045
7046 spin_lock(&conn->request_lock);
7047 list_for_each_entry(iter, command_list, request_entry) {
7048 chdr = smb2_get_msg(iter->request_buf);
7049
7050 if (chdr->MessageId != hdr->MessageId ||
7051 iter == work)
7052 continue;
7053
7054 ksmbd_debug(SMB,
7055 "smb2 with mid %llu cancelled command = 0x%x\n",
7056 le64_to_cpu(hdr->MessageId),
7057 le16_to_cpu(chdr->Command));
7058 iter->state = KSMBD_WORK_CANCELLED;
7059 break;
7060 }
7061 spin_unlock(&conn->request_lock);
7062 }
7063
7064 /* For SMB2_CANCEL command itself send no response*/
7065 work->send_no_response = 1;
7066 return 0;
7067 }
7068
smb_flock_init(struct file * f)7069 struct file_lock *smb_flock_init(struct file *f)
7070 {
7071 struct file_lock *fl;
7072
7073 fl = locks_alloc_lock();
7074 if (!fl)
7075 goto out;
7076
7077 locks_init_lock(fl);
7078
7079 fl->fl_owner = f;
7080 fl->fl_pid = current->tgid;
7081 fl->fl_file = f;
7082 fl->fl_flags = FL_POSIX;
7083 fl->fl_ops = NULL;
7084 fl->fl_lmops = NULL;
7085
7086 out:
7087 return fl;
7088 }
7089
smb2_set_flock_flags(struct file_lock * flock,int flags)7090 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7091 {
7092 int cmd = -EINVAL;
7093
7094 /* Checking for wrong flag combination during lock request*/
7095 switch (flags) {
7096 case SMB2_LOCKFLAG_SHARED:
7097 ksmbd_debug(SMB, "received shared request\n");
7098 cmd = F_SETLKW;
7099 flock->fl_type = F_RDLCK;
7100 flock->fl_flags |= FL_SLEEP;
7101 break;
7102 case SMB2_LOCKFLAG_EXCLUSIVE:
7103 ksmbd_debug(SMB, "received exclusive request\n");
7104 cmd = F_SETLKW;
7105 flock->fl_type = F_WRLCK;
7106 flock->fl_flags |= FL_SLEEP;
7107 break;
7108 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7109 ksmbd_debug(SMB,
7110 "received shared & fail immediately request\n");
7111 cmd = F_SETLK;
7112 flock->fl_type = F_RDLCK;
7113 break;
7114 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7115 ksmbd_debug(SMB,
7116 "received exclusive & fail immediately request\n");
7117 cmd = F_SETLK;
7118 flock->fl_type = F_WRLCK;
7119 break;
7120 case SMB2_LOCKFLAG_UNLOCK:
7121 ksmbd_debug(SMB, "received unlock request\n");
7122 flock->fl_type = F_UNLCK;
7123 cmd = F_SETLK;
7124 break;
7125 }
7126
7127 return cmd;
7128 }
7129
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)7130 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7131 unsigned int cmd, int flags,
7132 struct list_head *lock_list)
7133 {
7134 struct ksmbd_lock *lock;
7135
7136 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
7137 if (!lock)
7138 return NULL;
7139
7140 lock->cmd = cmd;
7141 lock->fl = flock;
7142 lock->start = flock->fl_start;
7143 lock->end = flock->fl_end;
7144 lock->flags = flags;
7145 if (lock->start == lock->end)
7146 lock->zero_len = 1;
7147 INIT_LIST_HEAD(&lock->clist);
7148 INIT_LIST_HEAD(&lock->flist);
7149 INIT_LIST_HEAD(&lock->llist);
7150 list_add_tail(&lock->llist, lock_list);
7151
7152 return lock;
7153 }
7154
smb2_remove_blocked_lock(void ** argv)7155 static void smb2_remove_blocked_lock(void **argv)
7156 {
7157 struct file_lock *flock = (struct file_lock *)argv[0];
7158
7159 ksmbd_vfs_posix_lock_unblock(flock);
7160 wake_up(&flock->fl_wait);
7161 }
7162
lock_defer_pending(struct file_lock * fl)7163 static inline bool lock_defer_pending(struct file_lock *fl)
7164 {
7165 /* check pending lock waiters */
7166 return waitqueue_active(&fl->fl_wait);
7167 }
7168
7169 /**
7170 * smb2_lock() - handler for smb2 file lock command
7171 * @work: smb work containing lock command buffer
7172 *
7173 * Return: 0 on success, otherwise error
7174 */
smb2_lock(struct ksmbd_work * work)7175 int smb2_lock(struct ksmbd_work *work)
7176 {
7177 struct smb2_lock_req *req;
7178 struct smb2_lock_rsp *rsp;
7179 struct smb2_lock_element *lock_ele;
7180 struct ksmbd_file *fp = NULL;
7181 struct file_lock *flock = NULL;
7182 struct file *filp = NULL;
7183 int lock_count;
7184 int flags = 0;
7185 int cmd = 0;
7186 int err = -EIO, i, rc = 0;
7187 u64 lock_start, lock_length;
7188 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7189 struct ksmbd_conn *conn;
7190 int nolock = 0;
7191 LIST_HEAD(lock_list);
7192 LIST_HEAD(rollback_list);
7193 int prior_lock = 0;
7194
7195 WORK_BUFFERS(work, req, rsp);
7196
7197 ksmbd_debug(SMB, "Received lock request\n");
7198 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7199 if (!fp) {
7200 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7201 err = -ENOENT;
7202 goto out2;
7203 }
7204
7205 filp = fp->filp;
7206 lock_count = le16_to_cpu(req->LockCount);
7207 lock_ele = req->locks;
7208
7209 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7210 if (!lock_count) {
7211 err = -EINVAL;
7212 goto out2;
7213 }
7214
7215 for (i = 0; i < lock_count; i++) {
7216 flags = le32_to_cpu(lock_ele[i].Flags);
7217
7218 flock = smb_flock_init(filp);
7219 if (!flock)
7220 goto out;
7221
7222 cmd = smb2_set_flock_flags(flock, flags);
7223
7224 lock_start = le64_to_cpu(lock_ele[i].Offset);
7225 lock_length = le64_to_cpu(lock_ele[i].Length);
7226 if (lock_start > U64_MAX - lock_length) {
7227 pr_err("Invalid lock range requested\n");
7228 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7229 locks_free_lock(flock);
7230 goto out;
7231 }
7232
7233 if (lock_start > OFFSET_MAX)
7234 flock->fl_start = OFFSET_MAX;
7235 else
7236 flock->fl_start = lock_start;
7237
7238 lock_length = le64_to_cpu(lock_ele[i].Length);
7239 if (lock_length > OFFSET_MAX - flock->fl_start)
7240 lock_length = OFFSET_MAX - flock->fl_start;
7241
7242 flock->fl_end = flock->fl_start + lock_length;
7243
7244 if (flock->fl_end < flock->fl_start) {
7245 ksmbd_debug(SMB,
7246 "the end offset(%llx) is smaller than the start offset(%llx)\n",
7247 flock->fl_end, flock->fl_start);
7248 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7249 locks_free_lock(flock);
7250 goto out;
7251 }
7252
7253 /* Check conflict locks in one request */
7254 list_for_each_entry(cmp_lock, &lock_list, llist) {
7255 if (cmp_lock->fl->fl_start <= flock->fl_start &&
7256 cmp_lock->fl->fl_end >= flock->fl_end) {
7257 if (cmp_lock->fl->fl_type != F_UNLCK &&
7258 flock->fl_type != F_UNLCK) {
7259 pr_err("conflict two locks in one request\n");
7260 err = -EINVAL;
7261 locks_free_lock(flock);
7262 goto out;
7263 }
7264 }
7265 }
7266
7267 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7268 if (!smb_lock) {
7269 err = -EINVAL;
7270 locks_free_lock(flock);
7271 goto out;
7272 }
7273 }
7274
7275 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7276 if (smb_lock->cmd < 0) {
7277 err = -EINVAL;
7278 goto out;
7279 }
7280
7281 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7282 err = -EINVAL;
7283 goto out;
7284 }
7285
7286 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7287 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7288 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7289 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7290 err = -EINVAL;
7291 goto out;
7292 }
7293
7294 prior_lock = smb_lock->flags;
7295
7296 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7297 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7298 goto no_check_cl;
7299
7300 nolock = 1;
7301 /* check locks in connection list */
7302 down_read(&conn_list_lock);
7303 list_for_each_entry(conn, &conn_list, conns_list) {
7304 spin_lock(&conn->llist_lock);
7305 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7306 if (file_inode(cmp_lock->fl->fl_file) !=
7307 file_inode(smb_lock->fl->fl_file))
7308 continue;
7309
7310 if (smb_lock->fl->fl_type == F_UNLCK) {
7311 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
7312 cmp_lock->start == smb_lock->start &&
7313 cmp_lock->end == smb_lock->end &&
7314 !lock_defer_pending(cmp_lock->fl)) {
7315 nolock = 0;
7316 list_del(&cmp_lock->flist);
7317 list_del(&cmp_lock->clist);
7318 spin_unlock(&conn->llist_lock);
7319 up_read(&conn_list_lock);
7320
7321 locks_free_lock(cmp_lock->fl);
7322 kfree(cmp_lock);
7323 goto out_check_cl;
7324 }
7325 continue;
7326 }
7327
7328 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7329 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7330 continue;
7331 } else {
7332 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7333 continue;
7334 }
7335
7336 /* check zero byte lock range */
7337 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7338 cmp_lock->start > smb_lock->start &&
7339 cmp_lock->start < smb_lock->end) {
7340 spin_unlock(&conn->llist_lock);
7341 up_read(&conn_list_lock);
7342 pr_err("previous lock conflict with zero byte lock range\n");
7343 goto out;
7344 }
7345
7346 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7347 smb_lock->start > cmp_lock->start &&
7348 smb_lock->start < cmp_lock->end) {
7349 spin_unlock(&conn->llist_lock);
7350 up_read(&conn_list_lock);
7351 pr_err("current lock conflict with zero byte lock range\n");
7352 goto out;
7353 }
7354
7355 if (((cmp_lock->start <= smb_lock->start &&
7356 cmp_lock->end > smb_lock->start) ||
7357 (cmp_lock->start < smb_lock->end &&
7358 cmp_lock->end >= smb_lock->end)) &&
7359 !cmp_lock->zero_len && !smb_lock->zero_len) {
7360 spin_unlock(&conn->llist_lock);
7361 up_read(&conn_list_lock);
7362 pr_err("Not allow lock operation on exclusive lock range\n");
7363 goto out;
7364 }
7365 }
7366 spin_unlock(&conn->llist_lock);
7367 }
7368 up_read(&conn_list_lock);
7369 out_check_cl:
7370 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7371 pr_err("Try to unlock nolocked range\n");
7372 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7373 goto out;
7374 }
7375
7376 no_check_cl:
7377 if (smb_lock->zero_len) {
7378 err = 0;
7379 goto skip;
7380 }
7381
7382 flock = smb_lock->fl;
7383 list_del(&smb_lock->llist);
7384 retry:
7385 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7386 skip:
7387 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7388 if (!rc) {
7389 ksmbd_debug(SMB, "File unlocked\n");
7390 } else if (rc == -ENOENT) {
7391 rsp->hdr.Status = STATUS_NOT_LOCKED;
7392 goto out;
7393 }
7394 locks_free_lock(flock);
7395 kfree(smb_lock);
7396 } else {
7397 if (rc == FILE_LOCK_DEFERRED) {
7398 void **argv;
7399
7400 ksmbd_debug(SMB,
7401 "would have to wait for getting lock\n");
7402 list_add(&smb_lock->llist, &rollback_list);
7403
7404 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7405 if (!argv) {
7406 err = -ENOMEM;
7407 goto out;
7408 }
7409 argv[0] = flock;
7410
7411 rc = setup_async_work(work,
7412 smb2_remove_blocked_lock,
7413 argv);
7414 if (rc) {
7415 kfree(argv);
7416 err = -ENOMEM;
7417 goto out;
7418 }
7419 spin_lock(&fp->f_lock);
7420 list_add(&work->fp_entry, &fp->blocked_works);
7421 spin_unlock(&fp->f_lock);
7422
7423 smb2_send_interim_resp(work, STATUS_PENDING);
7424
7425 ksmbd_vfs_posix_lock_wait(flock);
7426
7427 spin_lock(&fp->f_lock);
7428 list_del(&work->fp_entry);
7429 spin_unlock(&fp->f_lock);
7430
7431 if (work->state != KSMBD_WORK_ACTIVE) {
7432 list_del(&smb_lock->llist);
7433 locks_free_lock(flock);
7434
7435 if (work->state == KSMBD_WORK_CANCELLED) {
7436 rsp->hdr.Status =
7437 STATUS_CANCELLED;
7438 kfree(smb_lock);
7439 smb2_send_interim_resp(work,
7440 STATUS_CANCELLED);
7441 work->send_no_response = 1;
7442 goto out;
7443 }
7444
7445 rsp->hdr.Status =
7446 STATUS_RANGE_NOT_LOCKED;
7447 kfree(smb_lock);
7448 goto out2;
7449 }
7450
7451 list_del(&smb_lock->llist);
7452 release_async_work(work);
7453 goto retry;
7454 } else if (!rc) {
7455 list_add(&smb_lock->llist, &rollback_list);
7456 spin_lock(&work->conn->llist_lock);
7457 list_add_tail(&smb_lock->clist,
7458 &work->conn->lock_list);
7459 list_add_tail(&smb_lock->flist,
7460 &fp->lock_list);
7461 spin_unlock(&work->conn->llist_lock);
7462 ksmbd_debug(SMB, "successful in taking lock\n");
7463 } else {
7464 goto out;
7465 }
7466 }
7467 }
7468
7469 if (atomic_read(&fp->f_ci->op_count) > 1)
7470 smb_break_all_oplock(work, fp);
7471
7472 rsp->StructureSize = cpu_to_le16(4);
7473 ksmbd_debug(SMB, "successful in taking lock\n");
7474 rsp->hdr.Status = STATUS_SUCCESS;
7475 rsp->Reserved = 0;
7476 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7477 if (err)
7478 goto out;
7479
7480 ksmbd_fd_put(work, fp);
7481 return 0;
7482
7483 out:
7484 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7485 locks_free_lock(smb_lock->fl);
7486 list_del(&smb_lock->llist);
7487 kfree(smb_lock);
7488 }
7489
7490 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7491 struct file_lock *rlock = NULL;
7492
7493 rlock = smb_flock_init(filp);
7494 rlock->fl_type = F_UNLCK;
7495 rlock->fl_start = smb_lock->start;
7496 rlock->fl_end = smb_lock->end;
7497
7498 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7499 if (rc)
7500 pr_err("rollback unlock fail : %d\n", rc);
7501
7502 list_del(&smb_lock->llist);
7503 spin_lock(&work->conn->llist_lock);
7504 if (!list_empty(&smb_lock->flist))
7505 list_del(&smb_lock->flist);
7506 list_del(&smb_lock->clist);
7507 spin_unlock(&work->conn->llist_lock);
7508
7509 locks_free_lock(smb_lock->fl);
7510 locks_free_lock(rlock);
7511 kfree(smb_lock);
7512 }
7513 out2:
7514 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7515
7516 if (!rsp->hdr.Status) {
7517 if (err == -EINVAL)
7518 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7519 else if (err == -ENOMEM)
7520 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7521 else if (err == -ENOENT)
7522 rsp->hdr.Status = STATUS_FILE_CLOSED;
7523 else
7524 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7525 }
7526
7527 smb2_set_err_rsp(work);
7528 ksmbd_fd_put(work, fp);
7529 return err;
7530 }
7531
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)7532 static int fsctl_copychunk(struct ksmbd_work *work,
7533 struct copychunk_ioctl_req *ci_req,
7534 unsigned int cnt_code,
7535 unsigned int input_count,
7536 unsigned long long volatile_id,
7537 unsigned long long persistent_id,
7538 struct smb2_ioctl_rsp *rsp)
7539 {
7540 struct copychunk_ioctl_rsp *ci_rsp;
7541 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7542 struct srv_copychunk *chunks;
7543 unsigned int i, chunk_count, chunk_count_written = 0;
7544 unsigned int chunk_size_written = 0;
7545 loff_t total_size_written = 0;
7546 int ret = 0;
7547
7548 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7549
7550 rsp->VolatileFileId = volatile_id;
7551 rsp->PersistentFileId = persistent_id;
7552 ci_rsp->ChunksWritten =
7553 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7554 ci_rsp->ChunkBytesWritten =
7555 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7556 ci_rsp->TotalBytesWritten =
7557 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7558
7559 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7560 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7561 if (chunk_count == 0)
7562 goto out;
7563 total_size_written = 0;
7564
7565 /* verify the SRV_COPYCHUNK_COPY packet */
7566 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7567 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7568 chunk_count * sizeof(struct srv_copychunk)) {
7569 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7570 return -EINVAL;
7571 }
7572
7573 for (i = 0; i < chunk_count; i++) {
7574 if (le32_to_cpu(chunks[i].Length) == 0 ||
7575 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7576 break;
7577 total_size_written += le32_to_cpu(chunks[i].Length);
7578 }
7579
7580 if (i < chunk_count ||
7581 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7582 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7583 return -EINVAL;
7584 }
7585
7586 src_fp = ksmbd_lookup_foreign_fd(work,
7587 le64_to_cpu(ci_req->ResumeKey[0]));
7588 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7589 ret = -EINVAL;
7590 if (!src_fp ||
7591 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7592 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7593 goto out;
7594 }
7595
7596 if (!dst_fp) {
7597 rsp->hdr.Status = STATUS_FILE_CLOSED;
7598 goto out;
7599 }
7600
7601 /*
7602 * FILE_READ_DATA should only be included in
7603 * the FSCTL_COPYCHUNK case
7604 */
7605 if (cnt_code == FSCTL_COPYCHUNK &&
7606 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7607 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7608 goto out;
7609 }
7610
7611 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7612 chunks, chunk_count,
7613 &chunk_count_written,
7614 &chunk_size_written,
7615 &total_size_written);
7616 if (ret < 0) {
7617 if (ret == -EACCES)
7618 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7619 if (ret == -EAGAIN)
7620 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7621 else if (ret == -EBADF)
7622 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7623 else if (ret == -EFBIG || ret == -ENOSPC)
7624 rsp->hdr.Status = STATUS_DISK_FULL;
7625 else if (ret == -EINVAL)
7626 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7627 else if (ret == -EISDIR)
7628 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7629 else if (ret == -E2BIG)
7630 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7631 else
7632 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7633 }
7634
7635 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7636 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7637 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7638 out:
7639 ksmbd_fd_put(work, src_fp);
7640 ksmbd_fd_put(work, dst_fp);
7641 return ret;
7642 }
7643
idev_ipv4_address(struct in_device * idev)7644 static __be32 idev_ipv4_address(struct in_device *idev)
7645 {
7646 __be32 addr = 0;
7647
7648 struct in_ifaddr *ifa;
7649
7650 rcu_read_lock();
7651 in_dev_for_each_ifa_rcu(ifa, idev) {
7652 if (ifa->ifa_flags & IFA_F_SECONDARY)
7653 continue;
7654
7655 addr = ifa->ifa_address;
7656 break;
7657 }
7658 rcu_read_unlock();
7659 return addr;
7660 }
7661
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7662 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7663 struct smb2_ioctl_rsp *rsp,
7664 unsigned int out_buf_len)
7665 {
7666 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7667 int nbytes = 0;
7668 struct net_device *netdev;
7669 struct sockaddr_storage_rsp *sockaddr_storage;
7670 unsigned int flags;
7671 unsigned long long speed;
7672
7673 rtnl_lock();
7674 for_each_netdev(&init_net, netdev) {
7675 bool ipv4_set = false;
7676
7677 if (netdev->type == ARPHRD_LOOPBACK)
7678 continue;
7679
7680 flags = dev_get_flags(netdev);
7681 if (!(flags & IFF_RUNNING))
7682 continue;
7683 ipv6_retry:
7684 if (out_buf_len <
7685 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7686 rtnl_unlock();
7687 return -ENOSPC;
7688 }
7689
7690 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7691 &rsp->Buffer[nbytes];
7692 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7693
7694 nii_rsp->Capability = 0;
7695 if (netdev->real_num_tx_queues > 1)
7696 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7697 if (ksmbd_rdma_capable_netdev(netdev))
7698 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7699
7700 nii_rsp->Next = cpu_to_le32(152);
7701 nii_rsp->Reserved = 0;
7702
7703 if (netdev->ethtool_ops->get_link_ksettings) {
7704 struct ethtool_link_ksettings cmd;
7705
7706 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7707 speed = cmd.base.speed;
7708 } else {
7709 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7710 "speed is unknown, defaulting to 1Gb/sec");
7711 speed = SPEED_1000;
7712 }
7713
7714 speed *= 1000000;
7715 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7716
7717 sockaddr_storage = (struct sockaddr_storage_rsp *)
7718 nii_rsp->SockAddr_Storage;
7719 memset(sockaddr_storage, 0, 128);
7720
7721 if (!ipv4_set) {
7722 struct in_device *idev;
7723
7724 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7725 sockaddr_storage->addr4.Port = 0;
7726
7727 idev = __in_dev_get_rtnl(netdev);
7728 if (!idev)
7729 continue;
7730 sockaddr_storage->addr4.IPv4address =
7731 idev_ipv4_address(idev);
7732 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7733 ipv4_set = true;
7734 goto ipv6_retry;
7735 } else {
7736 struct inet6_dev *idev6;
7737 struct inet6_ifaddr *ifa;
7738 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7739
7740 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7741 sockaddr_storage->addr6.Port = 0;
7742 sockaddr_storage->addr6.FlowInfo = 0;
7743
7744 idev6 = __in6_dev_get(netdev);
7745 if (!idev6)
7746 continue;
7747
7748 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7749 if (ifa->flags & (IFA_F_TENTATIVE |
7750 IFA_F_DEPRECATED))
7751 continue;
7752 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7753 break;
7754 }
7755 sockaddr_storage->addr6.ScopeId = 0;
7756 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7757 }
7758 }
7759 rtnl_unlock();
7760
7761 /* zero if this is last one */
7762 if (nii_rsp)
7763 nii_rsp->Next = 0;
7764
7765 rsp->PersistentFileId = SMB2_NO_FID;
7766 rsp->VolatileFileId = SMB2_NO_FID;
7767 return nbytes;
7768 }
7769
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)7770 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7771 struct validate_negotiate_info_req *neg_req,
7772 struct validate_negotiate_info_rsp *neg_rsp,
7773 unsigned int in_buf_len)
7774 {
7775 int ret = 0;
7776 int dialect;
7777
7778 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7779 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7780 return -EINVAL;
7781
7782 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7783 neg_req->DialectCount);
7784 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7785 ret = -EINVAL;
7786 goto err_out;
7787 }
7788
7789 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7790 ret = -EINVAL;
7791 goto err_out;
7792 }
7793
7794 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7795 ret = -EINVAL;
7796 goto err_out;
7797 }
7798
7799 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7800 ret = -EINVAL;
7801 goto err_out;
7802 }
7803
7804 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7805 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7806 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7807 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7808 err_out:
7809 return ret;
7810 }
7811
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)7812 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7813 struct file_allocated_range_buffer *qar_req,
7814 struct file_allocated_range_buffer *qar_rsp,
7815 unsigned int in_count, unsigned int *out_count)
7816 {
7817 struct ksmbd_file *fp;
7818 loff_t start, length;
7819 int ret = 0;
7820
7821 *out_count = 0;
7822 if (in_count == 0)
7823 return -EINVAL;
7824
7825 start = le64_to_cpu(qar_req->file_offset);
7826 length = le64_to_cpu(qar_req->length);
7827
7828 if (start < 0 || length < 0)
7829 return -EINVAL;
7830
7831 fp = ksmbd_lookup_fd_fast(work, id);
7832 if (!fp)
7833 return -ENOENT;
7834
7835 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7836 qar_rsp, in_count, out_count);
7837 if (ret && ret != -E2BIG)
7838 *out_count = 0;
7839
7840 ksmbd_fd_put(work, fp);
7841 return ret;
7842 }
7843
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7844 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7845 unsigned int out_buf_len,
7846 struct smb2_ioctl_req *req,
7847 struct smb2_ioctl_rsp *rsp)
7848 {
7849 struct ksmbd_rpc_command *rpc_resp;
7850 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7851 int nbytes = 0;
7852
7853 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7854 le32_to_cpu(req->InputCount));
7855 if (rpc_resp) {
7856 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7857 /*
7858 * set STATUS_SOME_NOT_MAPPED response
7859 * for unknown domain sid.
7860 */
7861 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7862 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7863 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7864 goto out;
7865 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7866 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7867 goto out;
7868 }
7869
7870 nbytes = rpc_resp->payload_sz;
7871 if (rpc_resp->payload_sz > out_buf_len) {
7872 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7873 nbytes = out_buf_len;
7874 }
7875
7876 if (!rpc_resp->payload_sz) {
7877 rsp->hdr.Status =
7878 STATUS_UNEXPECTED_IO_ERROR;
7879 goto out;
7880 }
7881
7882 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7883 }
7884 out:
7885 kvfree(rpc_resp);
7886 return nbytes;
7887 }
7888
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7889 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7890 struct file_sparse *sparse)
7891 {
7892 struct ksmbd_file *fp;
7893 struct mnt_idmap *idmap;
7894 int ret = 0;
7895 __le32 old_fattr;
7896
7897 fp = ksmbd_lookup_fd_fast(work, id);
7898 if (!fp)
7899 return -ENOENT;
7900 idmap = file_mnt_idmap(fp->filp);
7901
7902 old_fattr = fp->f_ci->m_fattr;
7903 if (sparse->SetSparse)
7904 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7905 else
7906 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7907
7908 if (fp->f_ci->m_fattr != old_fattr &&
7909 test_share_config_flag(work->tcon->share_conf,
7910 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7911 struct xattr_dos_attrib da;
7912
7913 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7914 fp->filp->f_path.dentry, &da);
7915 if (ret <= 0)
7916 goto out;
7917
7918 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7919 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7920 &fp->filp->f_path,
7921 &da, true);
7922 if (ret)
7923 fp->f_ci->m_fattr = old_fattr;
7924 }
7925
7926 out:
7927 ksmbd_fd_put(work, fp);
7928 return ret;
7929 }
7930
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)7931 static int fsctl_request_resume_key(struct ksmbd_work *work,
7932 struct smb2_ioctl_req *req,
7933 struct resume_key_ioctl_rsp *key_rsp)
7934 {
7935 struct ksmbd_file *fp;
7936
7937 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7938 if (!fp)
7939 return -ENOENT;
7940
7941 memset(key_rsp, 0, sizeof(*key_rsp));
7942 key_rsp->ResumeKey[0] = req->VolatileFileId;
7943 key_rsp->ResumeKey[1] = req->PersistentFileId;
7944 ksmbd_fd_put(work, fp);
7945
7946 return 0;
7947 }
7948
7949 /**
7950 * smb2_ioctl() - handler for smb2 ioctl command
7951 * @work: smb work containing ioctl command buffer
7952 *
7953 * Return: 0 on success, otherwise error
7954 */
smb2_ioctl(struct ksmbd_work * work)7955 int smb2_ioctl(struct ksmbd_work *work)
7956 {
7957 struct smb2_ioctl_req *req;
7958 struct smb2_ioctl_rsp *rsp;
7959 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7960 u64 id = KSMBD_NO_FID;
7961 struct ksmbd_conn *conn = work->conn;
7962 int ret = 0;
7963 char *buffer;
7964
7965 if (work->next_smb2_rcv_hdr_off) {
7966 req = ksmbd_req_buf_next(work);
7967 rsp = ksmbd_resp_buf_next(work);
7968 if (!has_file_id(req->VolatileFileId)) {
7969 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7970 work->compound_fid);
7971 id = work->compound_fid;
7972 }
7973 } else {
7974 req = smb2_get_msg(work->request_buf);
7975 rsp = smb2_get_msg(work->response_buf);
7976 }
7977
7978 if (!has_file_id(id))
7979 id = req->VolatileFileId;
7980
7981 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7982 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7983 goto out;
7984 }
7985
7986 buffer = (char *)req + le32_to_cpu(req->InputOffset);
7987
7988 cnt_code = le32_to_cpu(req->CtlCode);
7989 ret = smb2_calc_max_out_buf_len(work, 48,
7990 le32_to_cpu(req->MaxOutputResponse));
7991 if (ret < 0) {
7992 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7993 goto out;
7994 }
7995 out_buf_len = (unsigned int)ret;
7996 in_buf_len = le32_to_cpu(req->InputCount);
7997
7998 switch (cnt_code) {
7999 case FSCTL_DFS_GET_REFERRALS:
8000 case FSCTL_DFS_GET_REFERRALS_EX:
8001 /* Not support DFS yet */
8002 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
8003 goto out;
8004 case FSCTL_CREATE_OR_GET_OBJECT_ID:
8005 {
8006 struct file_object_buf_type1_ioctl_rsp *obj_buf;
8007
8008 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
8009 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
8010 &rsp->Buffer[0];
8011
8012 /*
8013 * TODO: This is dummy implementation to pass smbtorture
8014 * Need to check correct response later
8015 */
8016 memset(obj_buf->ObjectId, 0x0, 16);
8017 memset(obj_buf->BirthVolumeId, 0x0, 16);
8018 memset(obj_buf->BirthObjectId, 0x0, 16);
8019 memset(obj_buf->DomainId, 0x0, 16);
8020
8021 break;
8022 }
8023 case FSCTL_PIPE_TRANSCEIVE:
8024 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8025 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8026 break;
8027 case FSCTL_VALIDATE_NEGOTIATE_INFO:
8028 if (conn->dialect < SMB30_PROT_ID) {
8029 ret = -EOPNOTSUPP;
8030 goto out;
8031 }
8032
8033 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8034 Dialects)) {
8035 ret = -EINVAL;
8036 goto out;
8037 }
8038
8039 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8040 ret = -EINVAL;
8041 goto out;
8042 }
8043
8044 ret = fsctl_validate_negotiate_info(conn,
8045 (struct validate_negotiate_info_req *)buffer,
8046 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8047 in_buf_len);
8048 if (ret < 0)
8049 goto out;
8050
8051 nbytes = sizeof(struct validate_negotiate_info_rsp);
8052 rsp->PersistentFileId = SMB2_NO_FID;
8053 rsp->VolatileFileId = SMB2_NO_FID;
8054 break;
8055 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8056 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8057 if (ret < 0)
8058 goto out;
8059 nbytes = ret;
8060 break;
8061 case FSCTL_REQUEST_RESUME_KEY:
8062 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8063 ret = -EINVAL;
8064 goto out;
8065 }
8066
8067 ret = fsctl_request_resume_key(work, req,
8068 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8069 if (ret < 0)
8070 goto out;
8071 rsp->PersistentFileId = req->PersistentFileId;
8072 rsp->VolatileFileId = req->VolatileFileId;
8073 nbytes = sizeof(struct resume_key_ioctl_rsp);
8074 break;
8075 case FSCTL_COPYCHUNK:
8076 case FSCTL_COPYCHUNK_WRITE:
8077 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8078 ksmbd_debug(SMB,
8079 "User does not have write permission\n");
8080 ret = -EACCES;
8081 goto out;
8082 }
8083
8084 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
8085 ret = -EINVAL;
8086 goto out;
8087 }
8088
8089 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8090 ret = -EINVAL;
8091 goto out;
8092 }
8093
8094 nbytes = sizeof(struct copychunk_ioctl_rsp);
8095 rsp->VolatileFileId = req->VolatileFileId;
8096 rsp->PersistentFileId = req->PersistentFileId;
8097 fsctl_copychunk(work,
8098 (struct copychunk_ioctl_req *)buffer,
8099 le32_to_cpu(req->CtlCode),
8100 le32_to_cpu(req->InputCount),
8101 req->VolatileFileId,
8102 req->PersistentFileId,
8103 rsp);
8104 break;
8105 case FSCTL_SET_SPARSE:
8106 if (in_buf_len < sizeof(struct file_sparse)) {
8107 ret = -EINVAL;
8108 goto out;
8109 }
8110
8111 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8112 if (ret < 0)
8113 goto out;
8114 break;
8115 case FSCTL_SET_ZERO_DATA:
8116 {
8117 struct file_zero_data_information *zero_data;
8118 struct ksmbd_file *fp;
8119 loff_t off, len, bfz;
8120
8121 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8122 ksmbd_debug(SMB,
8123 "User does not have write permission\n");
8124 ret = -EACCES;
8125 goto out;
8126 }
8127
8128 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8129 ret = -EINVAL;
8130 goto out;
8131 }
8132
8133 zero_data =
8134 (struct file_zero_data_information *)buffer;
8135
8136 off = le64_to_cpu(zero_data->FileOffset);
8137 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8138 if (off < 0 || bfz < 0 || off > bfz) {
8139 ret = -EINVAL;
8140 goto out;
8141 }
8142
8143 len = bfz - off;
8144 if (len) {
8145 fp = ksmbd_lookup_fd_fast(work, id);
8146 if (!fp) {
8147 ret = -ENOENT;
8148 goto out;
8149 }
8150
8151 ret = ksmbd_vfs_zero_data(work, fp, off, len);
8152 ksmbd_fd_put(work, fp);
8153 if (ret < 0)
8154 goto out;
8155 }
8156 break;
8157 }
8158 case FSCTL_QUERY_ALLOCATED_RANGES:
8159 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8160 ret = -EINVAL;
8161 goto out;
8162 }
8163
8164 ret = fsctl_query_allocated_ranges(work, id,
8165 (struct file_allocated_range_buffer *)buffer,
8166 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8167 out_buf_len /
8168 sizeof(struct file_allocated_range_buffer), &nbytes);
8169 if (ret == -E2BIG) {
8170 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8171 } else if (ret < 0) {
8172 nbytes = 0;
8173 goto out;
8174 }
8175
8176 nbytes *= sizeof(struct file_allocated_range_buffer);
8177 break;
8178 case FSCTL_GET_REPARSE_POINT:
8179 {
8180 struct reparse_data_buffer *reparse_ptr;
8181 struct ksmbd_file *fp;
8182
8183 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8184 fp = ksmbd_lookup_fd_fast(work, id);
8185 if (!fp) {
8186 pr_err("not found fp!!\n");
8187 ret = -ENOENT;
8188 goto out;
8189 }
8190
8191 reparse_ptr->ReparseTag =
8192 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8193 reparse_ptr->ReparseDataLength = 0;
8194 ksmbd_fd_put(work, fp);
8195 nbytes = sizeof(struct reparse_data_buffer);
8196 break;
8197 }
8198 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8199 {
8200 struct ksmbd_file *fp_in, *fp_out = NULL;
8201 struct duplicate_extents_to_file *dup_ext;
8202 loff_t src_off, dst_off, length, cloned;
8203
8204 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8205 ret = -EINVAL;
8206 goto out;
8207 }
8208
8209 dup_ext = (struct duplicate_extents_to_file *)buffer;
8210
8211 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8212 dup_ext->PersistentFileHandle);
8213 if (!fp_in) {
8214 pr_err("not found file handle in duplicate extent to file\n");
8215 ret = -ENOENT;
8216 goto out;
8217 }
8218
8219 fp_out = ksmbd_lookup_fd_fast(work, id);
8220 if (!fp_out) {
8221 pr_err("not found fp\n");
8222 ret = -ENOENT;
8223 goto dup_ext_out;
8224 }
8225
8226 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8227 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8228 length = le64_to_cpu(dup_ext->ByteCount);
8229 /*
8230 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8231 * should fall back to vfs_copy_file_range(). This could be
8232 * beneficial when re-exporting nfs/smb mount, but note that
8233 * this can result in partial copy that returns an error status.
8234 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8235 * fall back to vfs_copy_file_range(), should be avoided when
8236 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8237 */
8238 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8239 fp_out->filp, dst_off, length, 0);
8240 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8241 ret = -EOPNOTSUPP;
8242 goto dup_ext_out;
8243 } else if (cloned != length) {
8244 cloned = vfs_copy_file_range(fp_in->filp, src_off,
8245 fp_out->filp, dst_off,
8246 length, 0);
8247 if (cloned != length) {
8248 if (cloned < 0)
8249 ret = cloned;
8250 else
8251 ret = -EINVAL;
8252 }
8253 }
8254
8255 dup_ext_out:
8256 ksmbd_fd_put(work, fp_in);
8257 ksmbd_fd_put(work, fp_out);
8258 if (ret < 0)
8259 goto out;
8260 break;
8261 }
8262 default:
8263 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8264 cnt_code);
8265 ret = -EOPNOTSUPP;
8266 goto out;
8267 }
8268
8269 rsp->CtlCode = cpu_to_le32(cnt_code);
8270 rsp->InputCount = cpu_to_le32(0);
8271 rsp->InputOffset = cpu_to_le32(112);
8272 rsp->OutputOffset = cpu_to_le32(112);
8273 rsp->OutputCount = cpu_to_le32(nbytes);
8274 rsp->StructureSize = cpu_to_le16(49);
8275 rsp->Reserved = cpu_to_le16(0);
8276 rsp->Flags = cpu_to_le32(0);
8277 rsp->Reserved2 = cpu_to_le32(0);
8278 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8279 if (!ret)
8280 return ret;
8281
8282 out:
8283 if (ret == -EACCES)
8284 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8285 else if (ret == -ENOENT)
8286 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8287 else if (ret == -EOPNOTSUPP)
8288 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8289 else if (ret == -ENOSPC)
8290 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8291 else if (ret < 0 || rsp->hdr.Status == 0)
8292 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8293 smb2_set_err_rsp(work);
8294 return 0;
8295 }
8296
8297 /**
8298 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8299 * @work: smb work containing oplock break command buffer
8300 *
8301 * Return: 0
8302 */
smb20_oplock_break_ack(struct ksmbd_work * work)8303 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8304 {
8305 struct smb2_oplock_break *req;
8306 struct smb2_oplock_break *rsp;
8307 struct ksmbd_file *fp;
8308 struct oplock_info *opinfo = NULL;
8309 __le32 err = 0;
8310 int ret = 0;
8311 u64 volatile_id, persistent_id;
8312 char req_oplevel = 0, rsp_oplevel = 0;
8313 unsigned int oplock_change_type;
8314
8315 WORK_BUFFERS(work, req, rsp);
8316
8317 volatile_id = req->VolatileFid;
8318 persistent_id = req->PersistentFid;
8319 req_oplevel = req->OplockLevel;
8320 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8321 volatile_id, persistent_id, req_oplevel);
8322
8323 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8324 if (!fp) {
8325 rsp->hdr.Status = STATUS_FILE_CLOSED;
8326 smb2_set_err_rsp(work);
8327 return;
8328 }
8329
8330 opinfo = opinfo_get(fp);
8331 if (!opinfo) {
8332 pr_err("unexpected null oplock_info\n");
8333 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8334 smb2_set_err_rsp(work);
8335 ksmbd_fd_put(work, fp);
8336 return;
8337 }
8338
8339 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8340 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8341 goto err_out;
8342 }
8343
8344 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8345 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8346 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8347 goto err_out;
8348 }
8349
8350 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8351 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8352 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8353 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8354 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8355 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8356 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8357 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8358 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8359 oplock_change_type = OPLOCK_READ_TO_NONE;
8360 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8361 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8362 err = STATUS_INVALID_DEVICE_STATE;
8363 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8364 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8365 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8366 oplock_change_type = OPLOCK_WRITE_TO_READ;
8367 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8368 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8369 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8370 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8371 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8372 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8373 oplock_change_type = OPLOCK_READ_TO_NONE;
8374 } else {
8375 oplock_change_type = 0;
8376 }
8377 } else {
8378 oplock_change_type = 0;
8379 }
8380
8381 switch (oplock_change_type) {
8382 case OPLOCK_WRITE_TO_READ:
8383 ret = opinfo_write_to_read(opinfo);
8384 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8385 break;
8386 case OPLOCK_WRITE_TO_NONE:
8387 ret = opinfo_write_to_none(opinfo);
8388 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8389 break;
8390 case OPLOCK_READ_TO_NONE:
8391 ret = opinfo_read_to_none(opinfo);
8392 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8393 break;
8394 default:
8395 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8396 opinfo->level, rsp_oplevel);
8397 }
8398
8399 if (ret < 0) {
8400 rsp->hdr.Status = err;
8401 goto err_out;
8402 }
8403
8404 opinfo->op_state = OPLOCK_STATE_NONE;
8405 wake_up_interruptible_all(&opinfo->oplock_q);
8406 opinfo_put(opinfo);
8407 ksmbd_fd_put(work, fp);
8408
8409 rsp->StructureSize = cpu_to_le16(24);
8410 rsp->OplockLevel = rsp_oplevel;
8411 rsp->Reserved = 0;
8412 rsp->Reserved2 = 0;
8413 rsp->VolatileFid = volatile_id;
8414 rsp->PersistentFid = persistent_id;
8415 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8416 if (!ret)
8417 return;
8418
8419 err_out:
8420 opinfo->op_state = OPLOCK_STATE_NONE;
8421 wake_up_interruptible_all(&opinfo->oplock_q);
8422
8423 opinfo_put(opinfo);
8424 ksmbd_fd_put(work, fp);
8425 smb2_set_err_rsp(work);
8426 }
8427
check_lease_state(struct lease * lease,__le32 req_state)8428 static int check_lease_state(struct lease *lease, __le32 req_state)
8429 {
8430 if ((lease->new_state ==
8431 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8432 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8433 lease->new_state = req_state;
8434 return 0;
8435 }
8436
8437 if (lease->new_state == req_state)
8438 return 0;
8439
8440 return 1;
8441 }
8442
8443 /**
8444 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8445 * @work: smb work containing lease break command buffer
8446 *
8447 * Return: 0
8448 */
smb21_lease_break_ack(struct ksmbd_work * work)8449 static void smb21_lease_break_ack(struct ksmbd_work *work)
8450 {
8451 struct ksmbd_conn *conn = work->conn;
8452 struct smb2_lease_ack *req;
8453 struct smb2_lease_ack *rsp;
8454 struct oplock_info *opinfo;
8455 __le32 err = 0;
8456 int ret = 0;
8457 unsigned int lease_change_type;
8458 __le32 lease_state;
8459 struct lease *lease;
8460
8461 WORK_BUFFERS(work, req, rsp);
8462
8463 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8464 le32_to_cpu(req->LeaseState));
8465 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8466 if (!opinfo) {
8467 ksmbd_debug(OPLOCK, "file not opened\n");
8468 smb2_set_err_rsp(work);
8469 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8470 return;
8471 }
8472 lease = opinfo->o_lease;
8473
8474 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8475 pr_err("unexpected lease break state 0x%x\n",
8476 opinfo->op_state);
8477 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8478 goto err_out;
8479 }
8480
8481 if (check_lease_state(lease, req->LeaseState)) {
8482 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8483 ksmbd_debug(OPLOCK,
8484 "req lease state: 0x%x, expected state: 0x%x\n",
8485 req->LeaseState, lease->new_state);
8486 goto err_out;
8487 }
8488
8489 if (!atomic_read(&opinfo->breaking_cnt)) {
8490 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8491 goto err_out;
8492 }
8493
8494 /* check for bad lease state */
8495 if (req->LeaseState &
8496 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8497 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8498 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8499 lease_change_type = OPLOCK_WRITE_TO_NONE;
8500 else
8501 lease_change_type = OPLOCK_READ_TO_NONE;
8502 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8503 le32_to_cpu(lease->state),
8504 le32_to_cpu(req->LeaseState));
8505 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8506 req->LeaseState != SMB2_LEASE_NONE_LE) {
8507 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8508 lease_change_type = OPLOCK_READ_TO_NONE;
8509 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8510 le32_to_cpu(lease->state),
8511 le32_to_cpu(req->LeaseState));
8512 } else {
8513 /* valid lease state changes */
8514 err = STATUS_INVALID_DEVICE_STATE;
8515 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8516 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8517 lease_change_type = OPLOCK_WRITE_TO_NONE;
8518 else
8519 lease_change_type = OPLOCK_READ_TO_NONE;
8520 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8521 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8522 lease_change_type = OPLOCK_WRITE_TO_READ;
8523 else
8524 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8525 } else {
8526 lease_change_type = 0;
8527 }
8528 }
8529
8530 switch (lease_change_type) {
8531 case OPLOCK_WRITE_TO_READ:
8532 ret = opinfo_write_to_read(opinfo);
8533 break;
8534 case OPLOCK_READ_HANDLE_TO_READ:
8535 ret = opinfo_read_handle_to_read(opinfo);
8536 break;
8537 case OPLOCK_WRITE_TO_NONE:
8538 ret = opinfo_write_to_none(opinfo);
8539 break;
8540 case OPLOCK_READ_TO_NONE:
8541 ret = opinfo_read_to_none(opinfo);
8542 break;
8543 default:
8544 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8545 le32_to_cpu(lease->state),
8546 le32_to_cpu(req->LeaseState));
8547 }
8548
8549 if (ret < 0) {
8550 rsp->hdr.Status = err;
8551 goto err_out;
8552 }
8553
8554 lease_state = lease->state;
8555 opinfo->op_state = OPLOCK_STATE_NONE;
8556 wake_up_interruptible_all(&opinfo->oplock_q);
8557 atomic_dec(&opinfo->breaking_cnt);
8558 wake_up_interruptible_all(&opinfo->oplock_brk);
8559 opinfo_put(opinfo);
8560
8561 rsp->StructureSize = cpu_to_le16(36);
8562 rsp->Reserved = 0;
8563 rsp->Flags = 0;
8564 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8565 rsp->LeaseState = lease_state;
8566 rsp->LeaseDuration = 0;
8567 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8568 if (!ret)
8569 return;
8570
8571 err_out:
8572 wake_up_interruptible_all(&opinfo->oplock_q);
8573 atomic_dec(&opinfo->breaking_cnt);
8574 wake_up_interruptible_all(&opinfo->oplock_brk);
8575
8576 opinfo_put(opinfo);
8577 smb2_set_err_rsp(work);
8578 }
8579
8580 /**
8581 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8582 * @work: smb work containing oplock/lease break command buffer
8583 *
8584 * Return: 0
8585 */
smb2_oplock_break(struct ksmbd_work * work)8586 int smb2_oplock_break(struct ksmbd_work *work)
8587 {
8588 struct smb2_oplock_break *req;
8589 struct smb2_oplock_break *rsp;
8590
8591 WORK_BUFFERS(work, req, rsp);
8592
8593 switch (le16_to_cpu(req->StructureSize)) {
8594 case OP_BREAK_STRUCT_SIZE_20:
8595 smb20_oplock_break_ack(work);
8596 break;
8597 case OP_BREAK_STRUCT_SIZE_21:
8598 smb21_lease_break_ack(work);
8599 break;
8600 default:
8601 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8602 le16_to_cpu(req->StructureSize));
8603 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8604 smb2_set_err_rsp(work);
8605 }
8606
8607 return 0;
8608 }
8609
8610 /**
8611 * smb2_notify() - handler for smb2 notify request
8612 * @work: smb work containing notify command buffer
8613 *
8614 * Return: 0
8615 */
smb2_notify(struct ksmbd_work * work)8616 int smb2_notify(struct ksmbd_work *work)
8617 {
8618 struct smb2_change_notify_req *req;
8619 struct smb2_change_notify_rsp *rsp;
8620
8621 WORK_BUFFERS(work, req, rsp);
8622
8623 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8624 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8625 smb2_set_err_rsp(work);
8626 return 0;
8627 }
8628
8629 smb2_set_err_rsp(work);
8630 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8631 return 0;
8632 }
8633
8634 /**
8635 * smb2_is_sign_req() - handler for checking packet signing status
8636 * @work: smb work containing notify command buffer
8637 * @command: SMB2 command id
8638 *
8639 * Return: true if packed is signed, false otherwise
8640 */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8641 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8642 {
8643 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8644
8645 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8646 command != SMB2_NEGOTIATE_HE &&
8647 command != SMB2_SESSION_SETUP_HE &&
8648 command != SMB2_OPLOCK_BREAK_HE)
8649 return true;
8650
8651 return false;
8652 }
8653
8654 /**
8655 * smb2_check_sign_req() - handler for req packet sign processing
8656 * @work: smb work containing notify command buffer
8657 *
8658 * Return: 1 on success, 0 otherwise
8659 */
smb2_check_sign_req(struct ksmbd_work * work)8660 int smb2_check_sign_req(struct ksmbd_work *work)
8661 {
8662 struct smb2_hdr *hdr;
8663 char signature_req[SMB2_SIGNATURE_SIZE];
8664 char signature[SMB2_HMACSHA256_SIZE];
8665 struct kvec iov[1];
8666 size_t len;
8667
8668 hdr = smb2_get_msg(work->request_buf);
8669 if (work->next_smb2_rcv_hdr_off)
8670 hdr = ksmbd_req_buf_next(work);
8671
8672 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8673 len = get_rfc1002_len(work->request_buf);
8674 else if (hdr->NextCommand)
8675 len = le32_to_cpu(hdr->NextCommand);
8676 else
8677 len = get_rfc1002_len(work->request_buf) -
8678 work->next_smb2_rcv_hdr_off;
8679
8680 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8681 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8682
8683 iov[0].iov_base = (char *)&hdr->ProtocolId;
8684 iov[0].iov_len = len;
8685
8686 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8687 signature))
8688 return 0;
8689
8690 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8691 pr_err("bad smb2 signature\n");
8692 return 0;
8693 }
8694
8695 return 1;
8696 }
8697
8698 /**
8699 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8700 * @work: smb work containing notify command buffer
8701 *
8702 */
smb2_set_sign_rsp(struct ksmbd_work * work)8703 void smb2_set_sign_rsp(struct ksmbd_work *work)
8704 {
8705 struct smb2_hdr *hdr;
8706 char signature[SMB2_HMACSHA256_SIZE];
8707 struct kvec *iov;
8708 int n_vec = 1;
8709
8710 hdr = ksmbd_resp_buf_curr(work);
8711 hdr->Flags |= SMB2_FLAGS_SIGNED;
8712 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8713
8714 if (hdr->Command == SMB2_READ) {
8715 iov = &work->iov[work->iov_idx - 1];
8716 n_vec++;
8717 } else {
8718 iov = &work->iov[work->iov_idx];
8719 }
8720
8721 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8722 signature))
8723 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8724 }
8725
8726 /**
8727 * smb3_check_sign_req() - handler for req packet sign processing
8728 * @work: smb work containing notify command buffer
8729 *
8730 * Return: 1 on success, 0 otherwise
8731 */
smb3_check_sign_req(struct ksmbd_work * work)8732 int smb3_check_sign_req(struct ksmbd_work *work)
8733 {
8734 struct ksmbd_conn *conn = work->conn;
8735 char *signing_key;
8736 struct smb2_hdr *hdr;
8737 struct channel *chann;
8738 char signature_req[SMB2_SIGNATURE_SIZE];
8739 char signature[SMB2_CMACAES_SIZE];
8740 struct kvec iov[1];
8741 size_t len;
8742
8743 hdr = smb2_get_msg(work->request_buf);
8744 if (work->next_smb2_rcv_hdr_off)
8745 hdr = ksmbd_req_buf_next(work);
8746
8747 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8748 len = get_rfc1002_len(work->request_buf);
8749 else if (hdr->NextCommand)
8750 len = le32_to_cpu(hdr->NextCommand);
8751 else
8752 len = get_rfc1002_len(work->request_buf) -
8753 work->next_smb2_rcv_hdr_off;
8754
8755 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8756 signing_key = work->sess->smb3signingkey;
8757 } else {
8758 chann = lookup_chann_list(work->sess, conn);
8759 if (!chann) {
8760 return 0;
8761 }
8762 signing_key = chann->smb3signingkey;
8763 }
8764
8765 if (!signing_key) {
8766 pr_err("SMB3 signing key is not generated\n");
8767 return 0;
8768 }
8769
8770 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8771 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8772 iov[0].iov_base = (char *)&hdr->ProtocolId;
8773 iov[0].iov_len = len;
8774
8775 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8776 return 0;
8777
8778 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8779 pr_err("bad smb2 signature\n");
8780 return 0;
8781 }
8782
8783 return 1;
8784 }
8785
8786 /**
8787 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8788 * @work: smb work containing notify command buffer
8789 *
8790 */
smb3_set_sign_rsp(struct ksmbd_work * work)8791 void smb3_set_sign_rsp(struct ksmbd_work *work)
8792 {
8793 struct ksmbd_conn *conn = work->conn;
8794 struct smb2_hdr *hdr;
8795 struct channel *chann;
8796 char signature[SMB2_CMACAES_SIZE];
8797 struct kvec *iov;
8798 int n_vec = 1;
8799 char *signing_key;
8800
8801 hdr = ksmbd_resp_buf_curr(work);
8802
8803 if (conn->binding == false &&
8804 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8805 signing_key = work->sess->smb3signingkey;
8806 } else {
8807 chann = lookup_chann_list(work->sess, work->conn);
8808 if (!chann) {
8809 return;
8810 }
8811 signing_key = chann->smb3signingkey;
8812 }
8813
8814 if (!signing_key)
8815 return;
8816
8817 hdr->Flags |= SMB2_FLAGS_SIGNED;
8818 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8819
8820 if (hdr->Command == SMB2_READ) {
8821 iov = &work->iov[work->iov_idx - 1];
8822 n_vec++;
8823 } else {
8824 iov = &work->iov[work->iov_idx];
8825 }
8826
8827 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8828 signature))
8829 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8830 }
8831
8832 /**
8833 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8834 * @work: smb work containing response buffer
8835 *
8836 */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8837 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8838 {
8839 struct ksmbd_conn *conn = work->conn;
8840 struct ksmbd_session *sess = work->sess;
8841 struct smb2_hdr *req, *rsp;
8842
8843 if (conn->dialect != SMB311_PROT_ID)
8844 return;
8845
8846 WORK_BUFFERS(work, req, rsp);
8847
8848 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8849 conn->preauth_info)
8850 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8851 conn->preauth_info->Preauth_HashValue);
8852
8853 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8854 __u8 *hash_value;
8855
8856 if (conn->binding) {
8857 struct preauth_session *preauth_sess;
8858
8859 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8860 if (!preauth_sess)
8861 return;
8862 hash_value = preauth_sess->Preauth_HashValue;
8863 } else {
8864 hash_value = sess->Preauth_HashValue;
8865 if (!hash_value)
8866 return;
8867 }
8868 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8869 hash_value);
8870 }
8871 }
8872
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8873 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8874 {
8875 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8876 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8877 unsigned int orig_len = get_rfc1002_len(old_buf);
8878
8879 /* tr_buf must be cleared by the caller */
8880 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8881 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8882 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8883 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8884 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8885 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8886 else
8887 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8888 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8889 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8890 inc_rfc1001_len(tr_buf, orig_len);
8891 }
8892
smb3_encrypt_resp(struct ksmbd_work * work)8893 int smb3_encrypt_resp(struct ksmbd_work *work)
8894 {
8895 struct kvec *iov = work->iov;
8896 int rc = -ENOMEM;
8897 void *tr_buf;
8898
8899 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8900 if (!tr_buf)
8901 return rc;
8902
8903 /* fill transform header */
8904 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8905
8906 iov[0].iov_base = tr_buf;
8907 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8908 work->tr_buf = tr_buf;
8909
8910 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8911 }
8912
smb3_is_transform_hdr(void * buf)8913 bool smb3_is_transform_hdr(void *buf)
8914 {
8915 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8916
8917 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8918 }
8919
smb3_decrypt_req(struct ksmbd_work * work)8920 int smb3_decrypt_req(struct ksmbd_work *work)
8921 {
8922 struct ksmbd_session *sess;
8923 char *buf = work->request_buf;
8924 unsigned int pdu_length = get_rfc1002_len(buf);
8925 struct kvec iov[2];
8926 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8927 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8928 int rc = 0;
8929
8930 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8931 buf_data_size < sizeof(struct smb2_hdr)) {
8932 pr_err("Transform message is too small (%u)\n",
8933 pdu_length);
8934 return -ECONNABORTED;
8935 }
8936
8937 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8938 pr_err("Transform message is broken\n");
8939 return -ECONNABORTED;
8940 }
8941
8942 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8943 if (!sess) {
8944 pr_err("invalid session id(%llx) in transform header\n",
8945 le64_to_cpu(tr_hdr->SessionId));
8946 return -ECONNABORTED;
8947 }
8948
8949 iov[0].iov_base = buf;
8950 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8951 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8952 iov[1].iov_len = buf_data_size;
8953 rc = ksmbd_crypt_message(work, iov, 2, 0);
8954 if (rc)
8955 return rc;
8956
8957 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8958 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8959
8960 return rc;
8961 }
8962
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)8963 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8964 {
8965 struct ksmbd_conn *conn = work->conn;
8966 struct ksmbd_session *sess = work->sess;
8967 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8968
8969 if (conn->dialect < SMB30_PROT_ID)
8970 return false;
8971
8972 if (work->next_smb2_rcv_hdr_off)
8973 rsp = ksmbd_resp_buf_next(work);
8974
8975 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8976 sess->user && !user_guest(sess->user) &&
8977 rsp->Status == STATUS_SUCCESS)
8978 return true;
8979 return false;
8980 }
8981