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 } else if (conn->dialect >= SMB30_PROT_ID &&
1691 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1692 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1693 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1694
1695 sess = ksmbd_session_lookup_slowpath(sess_id);
1696 if (!sess) {
1697 rc = -ENOENT;
1698 goto out_err;
1699 }
1700
1701 if (conn->dialect != sess->dialect) {
1702 rc = -EINVAL;
1703 goto out_err;
1704 }
1705
1706 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1707 rc = -EINVAL;
1708 goto out_err;
1709 }
1710
1711 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1712 SMB2_CLIENT_GUID_SIZE)) {
1713 rc = -ENOENT;
1714 goto out_err;
1715 }
1716
1717 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1718 rc = -EACCES;
1719 goto out_err;
1720 }
1721
1722 if (sess->state == SMB2_SESSION_EXPIRED) {
1723 rc = -EFAULT;
1724 goto out_err;
1725 }
1726
1727 if (ksmbd_conn_need_reconnect(conn)) {
1728 rc = -EFAULT;
1729 sess = NULL;
1730 goto out_err;
1731 }
1732
1733 if (ksmbd_session_lookup(conn, sess_id)) {
1734 rc = -EACCES;
1735 goto out_err;
1736 }
1737
1738 if (user_guest(sess->user)) {
1739 rc = -EOPNOTSUPP;
1740 goto out_err;
1741 }
1742
1743 conn->binding = true;
1744 } else if ((conn->dialect < SMB30_PROT_ID ||
1745 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1746 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1747 sess = NULL;
1748 rc = -EACCES;
1749 goto out_err;
1750 } else {
1751 sess = ksmbd_session_lookup(conn,
1752 le64_to_cpu(req->hdr.SessionId));
1753 if (!sess) {
1754 rc = -ENOENT;
1755 goto out_err;
1756 }
1757
1758 if (sess->state == SMB2_SESSION_EXPIRED) {
1759 rc = -EFAULT;
1760 goto out_err;
1761 }
1762
1763 if (ksmbd_conn_need_reconnect(conn)) {
1764 rc = -EFAULT;
1765 sess = NULL;
1766 goto out_err;
1767 }
1768 }
1769 work->sess = sess;
1770
1771 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1772 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1773 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1774 rc = -EINVAL;
1775 goto out_err;
1776 }
1777
1778 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1779 negblob_off);
1780
1781 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1782 if (conn->mechToken) {
1783 negblob = (struct negotiate_message *)conn->mechToken;
1784 negblob_len = conn->mechTokenLen;
1785 }
1786 }
1787
1788 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1789 rc = -EINVAL;
1790 goto out_err;
1791 }
1792
1793 if (server_conf.auth_mechs & conn->auth_mechs) {
1794 rc = generate_preauth_hash(work);
1795 if (rc)
1796 goto out_err;
1797
1798 if (conn->preferred_auth_mech &
1799 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1800 rc = krb5_authenticate(work, req, rsp);
1801 if (rc) {
1802 rc = -EINVAL;
1803 goto out_err;
1804 }
1805
1806 if (!ksmbd_conn_need_reconnect(conn)) {
1807 ksmbd_conn_set_good(conn);
1808 sess->state = SMB2_SESSION_VALID;
1809 }
1810 kfree(sess->Preauth_HashValue);
1811 sess->Preauth_HashValue = NULL;
1812 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1813 if (negblob->MessageType == NtLmNegotiate) {
1814 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1815 if (rc)
1816 goto out_err;
1817 rsp->hdr.Status =
1818 STATUS_MORE_PROCESSING_REQUIRED;
1819 } else if (negblob->MessageType == NtLmAuthenticate) {
1820 rc = ntlm_authenticate(work, req, rsp);
1821 if (rc)
1822 goto out_err;
1823
1824 if (!ksmbd_conn_need_reconnect(conn)) {
1825 ksmbd_conn_set_good(conn);
1826 sess->state = SMB2_SESSION_VALID;
1827 }
1828 if (conn->binding) {
1829 struct preauth_session *preauth_sess;
1830
1831 preauth_sess =
1832 ksmbd_preauth_session_lookup(conn, sess->id);
1833 if (preauth_sess) {
1834 list_del(&preauth_sess->preauth_entry);
1835 kfree(preauth_sess);
1836 }
1837 }
1838 kfree(sess->Preauth_HashValue);
1839 sess->Preauth_HashValue = NULL;
1840 } else {
1841 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1842 le32_to_cpu(negblob->MessageType));
1843 rc = -EINVAL;
1844 }
1845 } else {
1846 /* TODO: need one more negotiation */
1847 pr_err("Not support the preferred authentication\n");
1848 rc = -EINVAL;
1849 }
1850 } else {
1851 pr_err("Not support authentication\n");
1852 rc = -EINVAL;
1853 }
1854
1855 out_err:
1856 if (rc == -EINVAL)
1857 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1858 else if (rc == -ENOENT)
1859 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1860 else if (rc == -EACCES)
1861 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1862 else if (rc == -EFAULT)
1863 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1864 else if (rc == -ENOMEM)
1865 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1866 else if (rc == -EOPNOTSUPP)
1867 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1868 else if (rc)
1869 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1870
1871 if (conn->use_spnego && conn->mechToken) {
1872 kfree(conn->mechToken);
1873 conn->mechToken = NULL;
1874 }
1875
1876 if (rc < 0) {
1877 /*
1878 * SecurityBufferOffset should be set to zero
1879 * in session setup error response.
1880 */
1881 rsp->SecurityBufferOffset = 0;
1882
1883 if (sess) {
1884 bool try_delay = false;
1885
1886 /*
1887 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1888 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1889 * failure to make it harder to send enough random connection requests
1890 * to break into a server.
1891 */
1892 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1893 try_delay = true;
1894
1895 sess->last_active = jiffies;
1896 sess->state = SMB2_SESSION_EXPIRED;
1897 if (try_delay) {
1898 ksmbd_conn_set_need_reconnect(conn);
1899 ssleep(5);
1900 ksmbd_conn_set_need_negotiate(conn);
1901 }
1902 }
1903 smb2_set_err_rsp(work);
1904 } else {
1905 unsigned int iov_len;
1906
1907 if (rsp->SecurityBufferLength)
1908 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1909 le16_to_cpu(rsp->SecurityBufferLength);
1910 else
1911 iov_len = sizeof(struct smb2_sess_setup_rsp);
1912 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1913 if (rc)
1914 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1915 }
1916
1917 ksmbd_conn_unlock(conn);
1918 return rc;
1919 }
1920
1921 /**
1922 * smb2_tree_connect() - handler for smb2 tree connect command
1923 * @work: smb work containing smb request buffer
1924 *
1925 * Return: 0 on success, otherwise error
1926 */
smb2_tree_connect(struct ksmbd_work * work)1927 int smb2_tree_connect(struct ksmbd_work *work)
1928 {
1929 struct ksmbd_conn *conn = work->conn;
1930 struct smb2_tree_connect_req *req;
1931 struct smb2_tree_connect_rsp *rsp;
1932 struct ksmbd_session *sess = work->sess;
1933 char *treename = NULL, *name = NULL;
1934 struct ksmbd_tree_conn_status status;
1935 struct ksmbd_share_config *share = NULL;
1936 int rc = -EINVAL;
1937
1938 WORK_BUFFERS(work, req, rsp);
1939
1940 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1941 le16_to_cpu(req->PathLength), true,
1942 conn->local_nls);
1943 if (IS_ERR(treename)) {
1944 pr_err("treename is NULL\n");
1945 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1946 goto out_err1;
1947 }
1948
1949 name = ksmbd_extract_sharename(conn->um, treename);
1950 if (IS_ERR(name)) {
1951 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1952 goto out_err1;
1953 }
1954
1955 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1956 name, treename);
1957
1958 status = ksmbd_tree_conn_connect(conn, sess, name);
1959 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1960 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1961 else
1962 goto out_err1;
1963
1964 share = status.tree_conn->share_conf;
1965 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1966 ksmbd_debug(SMB, "IPC share path request\n");
1967 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1968 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1969 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1970 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1971 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1972 FILE_SYNCHRONIZE_LE;
1973 } else {
1974 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1975 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1976 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1977 if (test_tree_conn_flag(status.tree_conn,
1978 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1979 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1980 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1981 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1982 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1983 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1984 FILE_SYNCHRONIZE_LE;
1985 }
1986 }
1987
1988 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1989 if (conn->posix_ext_supported)
1990 status.tree_conn->posix_extensions = true;
1991
1992 write_lock(&sess->tree_conns_lock);
1993 status.tree_conn->t_state = TREE_CONNECTED;
1994 write_unlock(&sess->tree_conns_lock);
1995 rsp->StructureSize = cpu_to_le16(16);
1996 out_err1:
1997 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
1998 test_share_config_flag(share,
1999 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2000 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2001 else
2002 rsp->Capabilities = 0;
2003 rsp->Reserved = 0;
2004 /* default manual caching */
2005 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2006
2007 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2008 if (rc)
2009 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2010
2011 if (!IS_ERR(treename))
2012 kfree(treename);
2013 if (!IS_ERR(name))
2014 kfree(name);
2015
2016 switch (status.ret) {
2017 case KSMBD_TREE_CONN_STATUS_OK:
2018 rsp->hdr.Status = STATUS_SUCCESS;
2019 rc = 0;
2020 break;
2021 case -ESTALE:
2022 case -ENOENT:
2023 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2024 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2025 break;
2026 case -ENOMEM:
2027 case KSMBD_TREE_CONN_STATUS_NOMEM:
2028 rsp->hdr.Status = STATUS_NO_MEMORY;
2029 break;
2030 case KSMBD_TREE_CONN_STATUS_ERROR:
2031 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2032 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2033 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2034 break;
2035 case -EINVAL:
2036 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2037 break;
2038 default:
2039 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2040 }
2041
2042 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2043 smb2_set_err_rsp(work);
2044
2045 return rc;
2046 }
2047
2048 /**
2049 * smb2_create_open_flags() - convert smb open flags to unix open flags
2050 * @file_present: is file already present
2051 * @access: file access flags
2052 * @disposition: file disposition flags
2053 * @may_flags: set with MAY_ flags
2054 *
2055 * Return: file open flags
2056 */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags)2057 static int smb2_create_open_flags(bool file_present, __le32 access,
2058 __le32 disposition,
2059 int *may_flags)
2060 {
2061 int oflags = O_NONBLOCK | O_LARGEFILE;
2062
2063 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2064 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2065 oflags |= O_RDWR;
2066 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2067 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2068 oflags |= O_WRONLY;
2069 *may_flags = MAY_OPEN | MAY_WRITE;
2070 } else {
2071 oflags |= O_RDONLY;
2072 *may_flags = MAY_OPEN | MAY_READ;
2073 }
2074
2075 if (access == FILE_READ_ATTRIBUTES_LE)
2076 oflags |= O_PATH;
2077
2078 if (file_present) {
2079 switch (disposition & FILE_CREATE_MASK_LE) {
2080 case FILE_OPEN_LE:
2081 case FILE_CREATE_LE:
2082 break;
2083 case FILE_SUPERSEDE_LE:
2084 case FILE_OVERWRITE_LE:
2085 case FILE_OVERWRITE_IF_LE:
2086 oflags |= O_TRUNC;
2087 break;
2088 default:
2089 break;
2090 }
2091 } else {
2092 switch (disposition & FILE_CREATE_MASK_LE) {
2093 case FILE_SUPERSEDE_LE:
2094 case FILE_CREATE_LE:
2095 case FILE_OPEN_IF_LE:
2096 case FILE_OVERWRITE_IF_LE:
2097 oflags |= O_CREAT;
2098 break;
2099 case FILE_OPEN_LE:
2100 case FILE_OVERWRITE_LE:
2101 oflags &= ~O_CREAT;
2102 break;
2103 default:
2104 break;
2105 }
2106 }
2107
2108 return oflags;
2109 }
2110
2111 /**
2112 * smb2_tree_disconnect() - handler for smb tree connect request
2113 * @work: smb work containing request buffer
2114 *
2115 * Return: 0
2116 */
smb2_tree_disconnect(struct ksmbd_work * work)2117 int smb2_tree_disconnect(struct ksmbd_work *work)
2118 {
2119 struct smb2_tree_disconnect_rsp *rsp;
2120 struct smb2_tree_disconnect_req *req;
2121 struct ksmbd_session *sess = work->sess;
2122 struct ksmbd_tree_connect *tcon = work->tcon;
2123 int err;
2124
2125 WORK_BUFFERS(work, req, rsp);
2126
2127 ksmbd_debug(SMB, "request\n");
2128
2129 if (!tcon) {
2130 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2131
2132 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2133 err = -ENOENT;
2134 goto err_out;
2135 }
2136
2137 ksmbd_close_tree_conn_fds(work);
2138
2139 write_lock(&sess->tree_conns_lock);
2140 if (tcon->t_state == TREE_DISCONNECTED) {
2141 write_unlock(&sess->tree_conns_lock);
2142 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2143 err = -ENOENT;
2144 goto err_out;
2145 }
2146
2147 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2148 tcon->t_state = TREE_DISCONNECTED;
2149 write_unlock(&sess->tree_conns_lock);
2150
2151 err = ksmbd_tree_conn_disconnect(sess, tcon);
2152 if (err) {
2153 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2154 goto err_out;
2155 }
2156
2157 work->tcon = NULL;
2158
2159 rsp->StructureSize = cpu_to_le16(4);
2160 err = ksmbd_iov_pin_rsp(work, rsp,
2161 sizeof(struct smb2_tree_disconnect_rsp));
2162 if (err) {
2163 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2164 goto err_out;
2165 }
2166
2167 return 0;
2168
2169 err_out:
2170 smb2_set_err_rsp(work);
2171 return err;
2172
2173 }
2174
2175 /**
2176 * smb2_session_logoff() - handler for session log off request
2177 * @work: smb work containing request buffer
2178 *
2179 * Return: 0
2180 */
smb2_session_logoff(struct ksmbd_work * work)2181 int smb2_session_logoff(struct ksmbd_work *work)
2182 {
2183 struct ksmbd_conn *conn = work->conn;
2184 struct smb2_logoff_req *req;
2185 struct smb2_logoff_rsp *rsp;
2186 struct ksmbd_session *sess;
2187 u64 sess_id;
2188 int err;
2189
2190 WORK_BUFFERS(work, req, rsp);
2191
2192 ksmbd_debug(SMB, "request\n");
2193
2194 ksmbd_conn_lock(conn);
2195 if (!ksmbd_conn_good(conn)) {
2196 ksmbd_conn_unlock(conn);
2197 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2198 smb2_set_err_rsp(work);
2199 return -ENOENT;
2200 }
2201 sess_id = le64_to_cpu(req->hdr.SessionId);
2202 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2203 ksmbd_conn_unlock(conn);
2204
2205 ksmbd_close_session_fds(work);
2206 ksmbd_conn_wait_idle(conn, sess_id);
2207
2208 /*
2209 * Re-lookup session to validate if session is deleted
2210 * while waiting request complete
2211 */
2212 sess = ksmbd_session_lookup_all(conn, sess_id);
2213 if (ksmbd_tree_conn_session_logoff(sess)) {
2214 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2215 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2216 smb2_set_err_rsp(work);
2217 return -ENOENT;
2218 }
2219
2220 ksmbd_destroy_file_table(&sess->file_table);
2221 sess->state = SMB2_SESSION_EXPIRED;
2222
2223 ksmbd_free_user(sess->user);
2224 sess->user = NULL;
2225 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2226
2227 rsp->StructureSize = cpu_to_le16(4);
2228 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2229 if (err) {
2230 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2231 smb2_set_err_rsp(work);
2232 return err;
2233 }
2234 return 0;
2235 }
2236
2237 /**
2238 * create_smb2_pipe() - create IPC pipe
2239 * @work: smb work containing request buffer
2240 *
2241 * Return: 0 on success, otherwise error
2242 */
create_smb2_pipe(struct ksmbd_work * work)2243 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2244 {
2245 struct smb2_create_rsp *rsp;
2246 struct smb2_create_req *req;
2247 int id;
2248 int err;
2249 char *name;
2250
2251 WORK_BUFFERS(work, req, rsp);
2252
2253 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2254 1, work->conn->local_nls);
2255 if (IS_ERR(name)) {
2256 rsp->hdr.Status = STATUS_NO_MEMORY;
2257 err = PTR_ERR(name);
2258 goto out;
2259 }
2260
2261 id = ksmbd_session_rpc_open(work->sess, name);
2262 if (id < 0) {
2263 pr_err("Unable to open RPC pipe: %d\n", id);
2264 err = id;
2265 goto out;
2266 }
2267
2268 rsp->hdr.Status = STATUS_SUCCESS;
2269 rsp->StructureSize = cpu_to_le16(89);
2270 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2271 rsp->Flags = 0;
2272 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2273
2274 rsp->CreationTime = cpu_to_le64(0);
2275 rsp->LastAccessTime = cpu_to_le64(0);
2276 rsp->ChangeTime = cpu_to_le64(0);
2277 rsp->AllocationSize = cpu_to_le64(0);
2278 rsp->EndofFile = cpu_to_le64(0);
2279 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2280 rsp->Reserved2 = 0;
2281 rsp->VolatileFileId = id;
2282 rsp->PersistentFileId = 0;
2283 rsp->CreateContextsOffset = 0;
2284 rsp->CreateContextsLength = 0;
2285
2286 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2287 if (err)
2288 goto out;
2289
2290 kfree(name);
2291 return 0;
2292
2293 out:
2294 switch (err) {
2295 case -EINVAL:
2296 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2297 break;
2298 case -ENOSPC:
2299 case -ENOMEM:
2300 rsp->hdr.Status = STATUS_NO_MEMORY;
2301 break;
2302 }
2303
2304 if (!IS_ERR(name))
2305 kfree(name);
2306
2307 smb2_set_err_rsp(work);
2308 return err;
2309 }
2310
2311 /**
2312 * smb2_set_ea() - handler for setting extended attributes using set
2313 * info command
2314 * @eabuf: set info command buffer
2315 * @buf_len: set info command buffer length
2316 * @path: dentry path for get ea
2317 * @get_write: get write access to a mount
2318 *
2319 * Return: 0 on success, otherwise error
2320 */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2321 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2322 const struct path *path, bool get_write)
2323 {
2324 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2325 char *attr_name = NULL, *value;
2326 int rc = 0;
2327 unsigned int next = 0;
2328
2329 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2330 le16_to_cpu(eabuf->EaValueLength))
2331 return -EINVAL;
2332
2333 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2334 if (!attr_name)
2335 return -ENOMEM;
2336
2337 do {
2338 if (!eabuf->EaNameLength)
2339 goto next;
2340
2341 ksmbd_debug(SMB,
2342 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2343 eabuf->name, eabuf->EaNameLength,
2344 le16_to_cpu(eabuf->EaValueLength),
2345 le32_to_cpu(eabuf->NextEntryOffset));
2346
2347 if (eabuf->EaNameLength >
2348 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2349 rc = -EINVAL;
2350 break;
2351 }
2352
2353 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2354 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2355 eabuf->EaNameLength);
2356 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2357 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2358
2359 if (!eabuf->EaValueLength) {
2360 rc = ksmbd_vfs_casexattr_len(idmap,
2361 path->dentry,
2362 attr_name,
2363 XATTR_USER_PREFIX_LEN +
2364 eabuf->EaNameLength);
2365
2366 /* delete the EA only when it exits */
2367 if (rc > 0) {
2368 rc = ksmbd_vfs_remove_xattr(idmap,
2369 path,
2370 attr_name,
2371 get_write);
2372
2373 if (rc < 0) {
2374 ksmbd_debug(SMB,
2375 "remove xattr failed(%d)\n",
2376 rc);
2377 break;
2378 }
2379 }
2380
2381 /* if the EA doesn't exist, just do nothing. */
2382 rc = 0;
2383 } else {
2384 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2385 le16_to_cpu(eabuf->EaValueLength),
2386 0, get_write);
2387 if (rc < 0) {
2388 ksmbd_debug(SMB,
2389 "ksmbd_vfs_setxattr is failed(%d)\n",
2390 rc);
2391 break;
2392 }
2393 }
2394
2395 next:
2396 next = le32_to_cpu(eabuf->NextEntryOffset);
2397 if (next == 0 || buf_len < next)
2398 break;
2399 buf_len -= next;
2400 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2401 if (buf_len < sizeof(struct smb2_ea_info)) {
2402 rc = -EINVAL;
2403 break;
2404 }
2405
2406 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2407 le16_to_cpu(eabuf->EaValueLength)) {
2408 rc = -EINVAL;
2409 break;
2410 }
2411 } while (next != 0);
2412
2413 kfree(attr_name);
2414 return rc;
2415 }
2416
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2417 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2418 struct ksmbd_file *fp,
2419 char *stream_name, int s_type)
2420 {
2421 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2422 size_t xattr_stream_size;
2423 char *xattr_stream_name;
2424 int rc;
2425
2426 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2427 &xattr_stream_name,
2428 &xattr_stream_size,
2429 s_type);
2430 if (rc)
2431 return rc;
2432
2433 fp->stream.name = xattr_stream_name;
2434 fp->stream.size = xattr_stream_size;
2435
2436 /* Check if there is stream prefix in xattr space */
2437 rc = ksmbd_vfs_casexattr_len(idmap,
2438 path->dentry,
2439 xattr_stream_name,
2440 xattr_stream_size);
2441 if (rc >= 0)
2442 return 0;
2443
2444 if (fp->cdoption == FILE_OPEN_LE) {
2445 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2446 return -EBADF;
2447 }
2448
2449 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2450 if (rc < 0)
2451 pr_err("Failed to store XATTR stream name :%d\n", rc);
2452 return 0;
2453 }
2454
smb2_remove_smb_xattrs(const struct path * path)2455 static int smb2_remove_smb_xattrs(const struct path *path)
2456 {
2457 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2458 char *name, *xattr_list = NULL;
2459 ssize_t xattr_list_len;
2460 int err = 0;
2461
2462 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2463 if (xattr_list_len < 0) {
2464 goto out;
2465 } else if (!xattr_list_len) {
2466 ksmbd_debug(SMB, "empty xattr in the file\n");
2467 goto out;
2468 }
2469
2470 for (name = xattr_list; name - xattr_list < xattr_list_len;
2471 name += strlen(name) + 1) {
2472 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2473
2474 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2475 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2476 STREAM_PREFIX_LEN)) {
2477 err = ksmbd_vfs_remove_xattr(idmap, path,
2478 name, true);
2479 if (err)
2480 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2481 name);
2482 }
2483 }
2484 out:
2485 kvfree(xattr_list);
2486 return err;
2487 }
2488
smb2_create_truncate(const struct path * path)2489 static int smb2_create_truncate(const struct path *path)
2490 {
2491 int rc = vfs_truncate(path, 0);
2492
2493 if (rc) {
2494 pr_err("vfs_truncate failed, rc %d\n", rc);
2495 return rc;
2496 }
2497
2498 rc = smb2_remove_smb_xattrs(path);
2499 if (rc == -EOPNOTSUPP)
2500 rc = 0;
2501 if (rc)
2502 ksmbd_debug(SMB,
2503 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2504 rc);
2505 return rc;
2506 }
2507
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2508 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2509 struct ksmbd_file *fp)
2510 {
2511 struct xattr_dos_attrib da = {0};
2512 int rc;
2513
2514 if (!test_share_config_flag(tcon->share_conf,
2515 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2516 return;
2517
2518 da.version = 4;
2519 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2520 da.itime = da.create_time = fp->create_time;
2521 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2522 XATTR_DOSINFO_ITIME;
2523
2524 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2525 if (rc)
2526 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2527 }
2528
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2529 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2530 const struct path *path, struct ksmbd_file *fp)
2531 {
2532 struct xattr_dos_attrib da;
2533 int rc;
2534
2535 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2536
2537 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2538 if (!test_share_config_flag(tcon->share_conf,
2539 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2540 return;
2541
2542 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2543 path->dentry, &da);
2544 if (rc > 0) {
2545 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2546 fp->create_time = da.create_time;
2547 fp->itime = da.itime;
2548 }
2549 }
2550
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)2551 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2552 struct path *path, char *name, int open_flags,
2553 umode_t posix_mode, bool is_dir)
2554 {
2555 struct ksmbd_tree_connect *tcon = work->tcon;
2556 struct ksmbd_share_config *share = tcon->share_conf;
2557 umode_t mode;
2558 int rc;
2559
2560 if (!(open_flags & O_CREAT))
2561 return -EBADF;
2562
2563 ksmbd_debug(SMB, "file does not exist, so creating\n");
2564 if (is_dir == true) {
2565 ksmbd_debug(SMB, "creating directory\n");
2566
2567 mode = share_config_directory_mode(share, posix_mode);
2568 rc = ksmbd_vfs_mkdir(work, name, mode);
2569 if (rc)
2570 return rc;
2571 } else {
2572 ksmbd_debug(SMB, "creating regular file\n");
2573
2574 mode = share_config_create_mode(share, posix_mode);
2575 rc = ksmbd_vfs_create(work, name, mode);
2576 if (rc)
2577 return rc;
2578 }
2579
2580 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2581 if (rc) {
2582 pr_err("cannot get linux path (%s), err = %d\n",
2583 name, rc);
2584 return rc;
2585 }
2586 return 0;
2587 }
2588
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2589 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2590 struct smb2_create_req *req,
2591 const struct path *path)
2592 {
2593 struct create_context *context;
2594 struct create_sd_buf_req *sd_buf;
2595
2596 if (!req->CreateContextsOffset)
2597 return -ENOENT;
2598
2599 /* Parse SD BUFFER create contexts */
2600 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2601 if (!context)
2602 return -ENOENT;
2603 else if (IS_ERR(context))
2604 return PTR_ERR(context);
2605
2606 ksmbd_debug(SMB,
2607 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2608 sd_buf = (struct create_sd_buf_req *)context;
2609 if (le16_to_cpu(context->DataOffset) +
2610 le32_to_cpu(context->DataLength) <
2611 sizeof(struct create_sd_buf_req))
2612 return -EINVAL;
2613 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2614 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2615 }
2616
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2617 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2618 struct mnt_idmap *idmap,
2619 struct inode *inode)
2620 {
2621 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2622 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2623
2624 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2625 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2626 fattr->cf_mode = inode->i_mode;
2627 fattr->cf_acls = NULL;
2628 fattr->cf_dacls = NULL;
2629
2630 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2631 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2632 if (S_ISDIR(inode->i_mode))
2633 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2634 }
2635 }
2636
2637 enum {
2638 DURABLE_RECONN_V2 = 1,
2639 DURABLE_RECONN,
2640 DURABLE_REQ_V2,
2641 DURABLE_REQ,
2642 };
2643
2644 struct durable_info {
2645 struct ksmbd_file *fp;
2646 unsigned short int type;
2647 bool persistent;
2648 bool reconnected;
2649 unsigned int timeout;
2650 char *CreateGuid;
2651 };
2652
parse_durable_handle_context(struct ksmbd_work * work,struct smb2_create_req * req,struct lease_ctx_info * lc,struct durable_info * dh_info)2653 static int parse_durable_handle_context(struct ksmbd_work *work,
2654 struct smb2_create_req *req,
2655 struct lease_ctx_info *lc,
2656 struct durable_info *dh_info)
2657 {
2658 struct ksmbd_conn *conn = work->conn;
2659 struct create_context *context;
2660 int dh_idx, err = 0;
2661 u64 persistent_id = 0;
2662 int req_op_level;
2663 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2664
2665 req_op_level = req->RequestedOplockLevel;
2666 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2667 dh_idx++) {
2668 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2669 if (IS_ERR(context)) {
2670 err = PTR_ERR(context);
2671 goto out;
2672 }
2673 if (!context)
2674 continue;
2675
2676 switch (dh_idx) {
2677 case DURABLE_RECONN_V2:
2678 {
2679 struct create_durable_reconn_v2_req *recon_v2;
2680
2681 if (dh_info->type == DURABLE_RECONN ||
2682 dh_info->type == DURABLE_REQ_V2) {
2683 err = -EINVAL;
2684 goto out;
2685 }
2686
2687 recon_v2 = (struct create_durable_reconn_v2_req *)context;
2688 persistent_id = recon_v2->Fid.PersistentFileId;
2689 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2690 if (!dh_info->fp) {
2691 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2692 err = -EBADF;
2693 goto out;
2694 }
2695
2696 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2697 SMB2_CREATE_GUID_SIZE)) {
2698 err = -EBADF;
2699 ksmbd_put_durable_fd(dh_info->fp);
2700 goto out;
2701 }
2702
2703 dh_info->type = dh_idx;
2704 dh_info->reconnected = true;
2705 ksmbd_debug(SMB,
2706 "reconnect v2 Persistent-id from reconnect = %llu\n",
2707 persistent_id);
2708 break;
2709 }
2710 case DURABLE_RECONN:
2711 {
2712 struct create_durable_reconn_req *recon;
2713
2714 if (dh_info->type == DURABLE_RECONN_V2 ||
2715 dh_info->type == DURABLE_REQ_V2) {
2716 err = -EINVAL;
2717 goto out;
2718 }
2719
2720 recon = (struct create_durable_reconn_req *)context;
2721 persistent_id = recon->Data.Fid.PersistentFileId;
2722 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2723 if (!dh_info->fp) {
2724 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2725 err = -EBADF;
2726 goto out;
2727 }
2728
2729 dh_info->type = dh_idx;
2730 dh_info->reconnected = true;
2731 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2732 persistent_id);
2733 break;
2734 }
2735 case DURABLE_REQ_V2:
2736 {
2737 struct create_durable_req_v2 *durable_v2_blob;
2738
2739 if (dh_info->type == DURABLE_RECONN ||
2740 dh_info->type == DURABLE_RECONN_V2) {
2741 err = -EINVAL;
2742 goto out;
2743 }
2744
2745 durable_v2_blob =
2746 (struct create_durable_req_v2 *)context;
2747 ksmbd_debug(SMB, "Request for durable v2 open\n");
2748 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2749 if (dh_info->fp) {
2750 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2751 SMB2_CLIENT_GUID_SIZE)) {
2752 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2753 err = -ENOEXEC;
2754 goto out;
2755 }
2756
2757 dh_info->fp->conn = conn;
2758 dh_info->reconnected = true;
2759 goto out;
2760 }
2761 }
2762
2763 if (((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2764 req_op_level == SMB2_OPLOCK_LEVEL_BATCH)) {
2765 dh_info->CreateGuid =
2766 durable_v2_blob->CreateGuid;
2767 dh_info->persistent =
2768 le32_to_cpu(durable_v2_blob->Flags);
2769 dh_info->timeout =
2770 le32_to_cpu(durable_v2_blob->Timeout);
2771 dh_info->type = dh_idx;
2772 }
2773 break;
2774 }
2775 case DURABLE_REQ:
2776 if (dh_info->type == DURABLE_RECONN)
2777 goto out;
2778 if (dh_info->type == DURABLE_RECONN_V2 ||
2779 dh_info->type == DURABLE_REQ_V2) {
2780 err = -EINVAL;
2781 goto out;
2782 }
2783
2784 if (((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2785 req_op_level == SMB2_OPLOCK_LEVEL_BATCH)) {
2786 ksmbd_debug(SMB, "Request for durable open\n");
2787 dh_info->type = dh_idx;
2788 }
2789 }
2790 }
2791
2792 out:
2793 return err;
2794 }
2795
2796 /**
2797 * smb2_open() - handler for smb file open request
2798 * @work: smb work containing request buffer
2799 *
2800 * Return: 0 on success, otherwise error
2801 */
smb2_open(struct ksmbd_work * work)2802 int smb2_open(struct ksmbd_work *work)
2803 {
2804 struct ksmbd_conn *conn = work->conn;
2805 struct ksmbd_session *sess = work->sess;
2806 struct ksmbd_tree_connect *tcon = work->tcon;
2807 struct smb2_create_req *req;
2808 struct smb2_create_rsp *rsp;
2809 struct path path, parent_path;
2810 struct ksmbd_share_config *share = tcon->share_conf;
2811 struct ksmbd_file *fp = NULL;
2812 struct file *filp = NULL;
2813 struct mnt_idmap *idmap = NULL;
2814 struct kstat stat;
2815 struct create_context *context;
2816 struct lease_ctx_info *lc = NULL;
2817 struct create_ea_buf_req *ea_buf = NULL;
2818 struct oplock_info *opinfo;
2819 struct durable_info dh_info = {0};
2820 __le32 *next_ptr = NULL;
2821 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2822 int rc = 0;
2823 int contxt_cnt = 0, query_disk_id = 0;
2824 int maximal_access_ctxt = 0, posix_ctxt = 0;
2825 int s_type = 0;
2826 int next_off = 0;
2827 char *name = NULL;
2828 char *stream_name = NULL;
2829 bool file_present = false, created = false, already_permitted = false;
2830 int share_ret, need_truncate = 0;
2831 u64 time;
2832 umode_t posix_mode = 0;
2833 __le32 daccess, maximal_access = 0;
2834 int iov_len = 0;
2835
2836 WORK_BUFFERS(work, req, rsp);
2837
2838 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2839 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2840 ksmbd_debug(SMB, "invalid flag in chained command\n");
2841 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2842 smb2_set_err_rsp(work);
2843 return -EINVAL;
2844 }
2845
2846 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2847 ksmbd_debug(SMB, "IPC pipe create request\n");
2848 return create_smb2_pipe(work);
2849 }
2850
2851 if (req->NameLength) {
2852 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2853 le16_to_cpu(req->NameLength),
2854 work->conn->local_nls);
2855 if (IS_ERR(name)) {
2856 rc = PTR_ERR(name);
2857 name = NULL;
2858 goto err_out2;
2859 }
2860
2861 ksmbd_debug(SMB, "converted name = %s\n", name);
2862 if (strchr(name, ':')) {
2863 if (!test_share_config_flag(work->tcon->share_conf,
2864 KSMBD_SHARE_FLAG_STREAMS)) {
2865 rc = -EBADF;
2866 goto err_out2;
2867 }
2868 rc = parse_stream_name(name, &stream_name, &s_type);
2869 if (rc < 0)
2870 goto err_out2;
2871 }
2872
2873 rc = ksmbd_validate_filename(name);
2874 if (rc < 0)
2875 goto err_out2;
2876
2877 if (ksmbd_share_veto_filename(share, name)) {
2878 rc = -ENOENT;
2879 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2880 name);
2881 goto err_out2;
2882 }
2883 } else {
2884 name = kstrdup("", GFP_KERNEL);
2885 if (!name) {
2886 rc = -ENOMEM;
2887 goto err_out2;
2888 }
2889 }
2890
2891 req_op_level = req->RequestedOplockLevel;
2892
2893 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2894 req->CreateContextsOffset) {
2895 lc = parse_lease_state(req);
2896 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2897 if (rc) {
2898 ksmbd_debug(SMB, "error parsing durable handle context\n");
2899 goto err_out2;
2900 }
2901
2902 if (dh_info.reconnected == true) {
2903 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2904 if (rc) {
2905 ksmbd_put_durable_fd(dh_info.fp);
2906 goto err_out2;
2907 }
2908
2909 rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2910 if (rc) {
2911 ksmbd_put_durable_fd(dh_info.fp);
2912 goto err_out2;
2913 }
2914
2915 if (ksmbd_override_fsids(work)) {
2916 rc = -ENOMEM;
2917 ksmbd_put_durable_fd(dh_info.fp);
2918 goto err_out2;
2919 }
2920
2921 fp = dh_info.fp;
2922 file_info = FILE_OPENED;
2923
2924 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2925 if (rc)
2926 goto err_out2;
2927
2928 ksmbd_put_durable_fd(fp);
2929 goto reconnected_fp;
2930 }
2931 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2932 lc = parse_lease_state(req);
2933
2934 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2935 pr_err("Invalid impersonationlevel : 0x%x\n",
2936 le32_to_cpu(req->ImpersonationLevel));
2937 rc = -EIO;
2938 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2939 goto err_out2;
2940 }
2941
2942 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2943 pr_err("Invalid create options : 0x%x\n",
2944 le32_to_cpu(req->CreateOptions));
2945 rc = -EINVAL;
2946 goto err_out2;
2947 } else {
2948 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2949 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2950 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2951
2952 if (req->CreateOptions &
2953 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2954 FILE_RESERVE_OPFILTER_LE)) {
2955 rc = -EOPNOTSUPP;
2956 goto err_out2;
2957 }
2958
2959 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2960 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2961 rc = -EINVAL;
2962 goto err_out2;
2963 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2964 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2965 }
2966 }
2967 }
2968
2969 if (le32_to_cpu(req->CreateDisposition) >
2970 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2971 pr_err("Invalid create disposition : 0x%x\n",
2972 le32_to_cpu(req->CreateDisposition));
2973 rc = -EINVAL;
2974 goto err_out2;
2975 }
2976
2977 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2978 pr_err("Invalid desired access : 0x%x\n",
2979 le32_to_cpu(req->DesiredAccess));
2980 rc = -EACCES;
2981 goto err_out2;
2982 }
2983
2984 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2985 pr_err("Invalid file attribute : 0x%x\n",
2986 le32_to_cpu(req->FileAttributes));
2987 rc = -EINVAL;
2988 goto err_out2;
2989 }
2990
2991 if (req->CreateContextsOffset) {
2992 /* Parse non-durable handle create contexts */
2993 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2994 if (IS_ERR(context)) {
2995 rc = PTR_ERR(context);
2996 goto err_out2;
2997 } else if (context) {
2998 ea_buf = (struct create_ea_buf_req *)context;
2999 if (le16_to_cpu(context->DataOffset) +
3000 le32_to_cpu(context->DataLength) <
3001 sizeof(struct create_ea_buf_req)) {
3002 rc = -EINVAL;
3003 goto err_out2;
3004 }
3005 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3006 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3007 rc = -EACCES;
3008 goto err_out2;
3009 }
3010 }
3011
3012 context = smb2_find_context_vals(req,
3013 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3014 if (IS_ERR(context)) {
3015 rc = PTR_ERR(context);
3016 goto err_out2;
3017 } else if (context) {
3018 ksmbd_debug(SMB,
3019 "get query maximal access context\n");
3020 maximal_access_ctxt = 1;
3021 }
3022
3023 context = smb2_find_context_vals(req,
3024 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3025 if (IS_ERR(context)) {
3026 rc = PTR_ERR(context);
3027 goto err_out2;
3028 } else if (context) {
3029 ksmbd_debug(SMB, "get timewarp context\n");
3030 rc = -EBADF;
3031 goto err_out2;
3032 }
3033
3034 if (tcon->posix_extensions) {
3035 context = smb2_find_context_vals(req,
3036 SMB2_CREATE_TAG_POSIX, 16);
3037 if (IS_ERR(context)) {
3038 rc = PTR_ERR(context);
3039 goto err_out2;
3040 } else if (context) {
3041 struct create_posix *posix =
3042 (struct create_posix *)context;
3043 if (le16_to_cpu(context->DataOffset) +
3044 le32_to_cpu(context->DataLength) <
3045 sizeof(struct create_posix) - 4) {
3046 rc = -EINVAL;
3047 goto err_out2;
3048 }
3049 ksmbd_debug(SMB, "get posix context\n");
3050
3051 posix_mode = le32_to_cpu(posix->Mode);
3052 posix_ctxt = 1;
3053 }
3054 }
3055 }
3056
3057 if (ksmbd_override_fsids(work)) {
3058 rc = -ENOMEM;
3059 goto err_out2;
3060 }
3061
3062 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3063 &parent_path, &path, 1);
3064 if (!rc) {
3065 file_present = true;
3066
3067 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3068 /*
3069 * If file exists with under flags, return access
3070 * denied error.
3071 */
3072 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3073 req->CreateDisposition == FILE_OPEN_IF_LE) {
3074 rc = -EACCES;
3075 goto err_out;
3076 }
3077
3078 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3079 ksmbd_debug(SMB,
3080 "User does not have write permission\n");
3081 rc = -EACCES;
3082 goto err_out;
3083 }
3084 } else if (d_is_symlink(path.dentry)) {
3085 rc = -EACCES;
3086 goto err_out;
3087 }
3088
3089 file_present = true;
3090 idmap = mnt_idmap(path.mnt);
3091 } else {
3092 if (rc != -ENOENT)
3093 goto err_out;
3094 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3095 name, rc);
3096 rc = 0;
3097 }
3098
3099 if (stream_name) {
3100 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3101 if (s_type == DATA_STREAM) {
3102 rc = -EIO;
3103 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3104 }
3105 } else {
3106 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3107 s_type == DATA_STREAM) {
3108 rc = -EIO;
3109 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3110 }
3111 }
3112
3113 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3114 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3115 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3116 rc = -EIO;
3117 }
3118
3119 if (rc < 0)
3120 goto err_out;
3121 }
3122
3123 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3124 S_ISDIR(d_inode(path.dentry)->i_mode) &&
3125 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3126 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3127 name, req->CreateOptions);
3128 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3129 rc = -EIO;
3130 goto err_out;
3131 }
3132
3133 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3134 !(req->CreateDisposition == FILE_CREATE_LE) &&
3135 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3136 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3137 rc = -EIO;
3138 goto err_out;
3139 }
3140
3141 if (!stream_name && file_present &&
3142 req->CreateDisposition == FILE_CREATE_LE) {
3143 rc = -EEXIST;
3144 goto err_out;
3145 }
3146
3147 daccess = smb_map_generic_desired_access(req->DesiredAccess);
3148
3149 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3150 rc = smb_check_perm_dacl(conn, &path, &daccess,
3151 sess->user->uid);
3152 if (rc)
3153 goto err_out;
3154 }
3155
3156 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3157 if (!file_present) {
3158 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3159 } else {
3160 ksmbd_vfs_query_maximal_access(idmap,
3161 path.dentry,
3162 &daccess);
3163 already_permitted = true;
3164 }
3165 maximal_access = daccess;
3166 }
3167
3168 open_flags = smb2_create_open_flags(file_present, daccess,
3169 req->CreateDisposition,
3170 &may_flags);
3171
3172 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3173 if (open_flags & (O_CREAT | O_TRUNC)) {
3174 ksmbd_debug(SMB,
3175 "User does not have write permission\n");
3176 rc = -EACCES;
3177 goto err_out;
3178 }
3179 }
3180
3181 /*create file if not present */
3182 if (!file_present) {
3183 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3184 posix_mode,
3185 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3186 if (rc) {
3187 if (rc == -ENOENT) {
3188 rc = -EIO;
3189 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3190 }
3191 goto err_out;
3192 }
3193
3194 created = true;
3195 idmap = mnt_idmap(path.mnt);
3196 if (ea_buf) {
3197 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3198 sizeof(struct smb2_ea_info)) {
3199 rc = -EINVAL;
3200 goto err_out;
3201 }
3202
3203 rc = smb2_set_ea(&ea_buf->ea,
3204 le32_to_cpu(ea_buf->ccontext.DataLength),
3205 &path, false);
3206 if (rc == -EOPNOTSUPP)
3207 rc = 0;
3208 else if (rc)
3209 goto err_out;
3210 }
3211 } else if (!already_permitted) {
3212 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3213 * because execute(search) permission on a parent directory,
3214 * is already granted.
3215 */
3216 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3217 rc = inode_permission(idmap,
3218 d_inode(path.dentry),
3219 may_flags);
3220 if (rc)
3221 goto err_out;
3222
3223 if ((daccess & FILE_DELETE_LE) ||
3224 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3225 rc = inode_permission(idmap,
3226 d_inode(path.dentry->d_parent),
3227 MAY_EXEC | MAY_WRITE);
3228 if (rc)
3229 goto err_out;
3230 }
3231 }
3232 }
3233
3234 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3235 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3236 rc = -EBUSY;
3237 goto err_out;
3238 }
3239
3240 rc = 0;
3241 filp = dentry_open(&path, open_flags, current_cred());
3242 if (IS_ERR(filp)) {
3243 rc = PTR_ERR(filp);
3244 pr_err("dentry open for dir failed, rc %d\n", rc);
3245 goto err_out;
3246 }
3247
3248 if (file_present) {
3249 if (!(open_flags & O_TRUNC))
3250 file_info = FILE_OPENED;
3251 else
3252 file_info = FILE_OVERWRITTEN;
3253
3254 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3255 FILE_SUPERSEDE_LE)
3256 file_info = FILE_SUPERSEDED;
3257 } else if (open_flags & O_CREAT) {
3258 file_info = FILE_CREATED;
3259 }
3260
3261 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3262
3263 /* Obtain Volatile-ID */
3264 fp = ksmbd_open_fd(work, filp);
3265 if (IS_ERR(fp)) {
3266 fput(filp);
3267 rc = PTR_ERR(fp);
3268 fp = NULL;
3269 goto err_out;
3270 }
3271
3272 /* Get Persistent-ID */
3273 ksmbd_open_durable_fd(fp);
3274 if (!has_file_id(fp->persistent_id)) {
3275 rc = -ENOMEM;
3276 goto err_out;
3277 }
3278
3279 fp->cdoption = req->CreateDisposition;
3280 fp->daccess = daccess;
3281 fp->saccess = req->ShareAccess;
3282 fp->coption = req->CreateOptions;
3283
3284 /* Set default windows and posix acls if creating new file */
3285 if (created) {
3286 int posix_acl_rc;
3287 struct inode *inode = d_inode(path.dentry);
3288
3289 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3290 &path,
3291 d_inode(path.dentry->d_parent));
3292 if (posix_acl_rc)
3293 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3294
3295 if (test_share_config_flag(work->tcon->share_conf,
3296 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3297 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3298 sess->user->gid);
3299 }
3300
3301 if (rc) {
3302 rc = smb2_create_sd_buffer(work, req, &path);
3303 if (rc) {
3304 if (posix_acl_rc)
3305 ksmbd_vfs_set_init_posix_acl(idmap,
3306 &path);
3307
3308 if (test_share_config_flag(work->tcon->share_conf,
3309 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3310 struct smb_fattr fattr;
3311 struct smb_ntsd *pntsd;
3312 int pntsd_size, ace_num = 0;
3313
3314 ksmbd_acls_fattr(&fattr, idmap, inode);
3315 if (fattr.cf_acls)
3316 ace_num = fattr.cf_acls->a_count;
3317 if (fattr.cf_dacls)
3318 ace_num += fattr.cf_dacls->a_count;
3319
3320 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3321 sizeof(struct smb_sid) * 3 +
3322 sizeof(struct smb_acl) +
3323 sizeof(struct smb_ace) * ace_num * 2,
3324 GFP_KERNEL);
3325 if (!pntsd) {
3326 posix_acl_release(fattr.cf_acls);
3327 posix_acl_release(fattr.cf_dacls);
3328 goto err_out;
3329 }
3330
3331 rc = build_sec_desc(idmap,
3332 pntsd, NULL, 0,
3333 OWNER_SECINFO |
3334 GROUP_SECINFO |
3335 DACL_SECINFO,
3336 &pntsd_size, &fattr);
3337 posix_acl_release(fattr.cf_acls);
3338 posix_acl_release(fattr.cf_dacls);
3339 if (rc) {
3340 kfree(pntsd);
3341 goto err_out;
3342 }
3343
3344 rc = ksmbd_vfs_set_sd_xattr(conn,
3345 idmap,
3346 &path,
3347 pntsd,
3348 pntsd_size,
3349 false);
3350 kfree(pntsd);
3351 if (rc)
3352 pr_err("failed to store ntacl in xattr : %d\n",
3353 rc);
3354 }
3355 }
3356 }
3357 rc = 0;
3358 }
3359
3360 if (stream_name) {
3361 rc = smb2_set_stream_name_xattr(&path,
3362 fp,
3363 stream_name,
3364 s_type);
3365 if (rc)
3366 goto err_out;
3367 file_info = FILE_CREATED;
3368 }
3369
3370 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3371 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3372
3373 /* fp should be searchable through ksmbd_inode.m_fp_list
3374 * after daccess, saccess, attrib_only, and stream are
3375 * initialized.
3376 */
3377 down_write(&fp->f_ci->m_lock);
3378 list_add(&fp->node, &fp->f_ci->m_fp_list);
3379 up_write(&fp->f_ci->m_lock);
3380
3381 /* Check delete pending among previous fp before oplock break */
3382 if (ksmbd_inode_pending_delete(fp)) {
3383 rc = -EBUSY;
3384 goto err_out;
3385 }
3386
3387 if (file_present || created)
3388 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3389
3390 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3391 !fp->attrib_only && !stream_name) {
3392 smb_break_all_oplock(work, fp);
3393 need_truncate = 1;
3394 }
3395
3396 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3397 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3398 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3399 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3400 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3401 rc = share_ret;
3402 goto err_out1;
3403 }
3404 } else {
3405 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3406 if (S_ISDIR(file_inode(filp)->i_mode)) {
3407 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3408 lc->is_dir = true;
3409 }
3410
3411 /*
3412 * Compare parent lease using parent key. If there is no
3413 * a lease that has same parent key, Send lease break
3414 * notification.
3415 */
3416 smb_send_parent_lease_break_noti(fp, lc);
3417
3418 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3419 ksmbd_debug(SMB,
3420 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3421 name, req_op_level, lc->req_state);
3422 rc = find_same_lease_key(sess, fp->f_ci, lc);
3423 if (rc)
3424 goto err_out1;
3425 } else if (open_flags == O_RDONLY &&
3426 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3427 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3428 req_op_level = SMB2_OPLOCK_LEVEL_II;
3429
3430 rc = smb_grant_oplock(work, req_op_level,
3431 fp->persistent_id, fp,
3432 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3433 lc, share_ret);
3434 if (rc < 0)
3435 goto err_out1;
3436 }
3437
3438 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3439 ksmbd_fd_set_delete_on_close(fp, file_info);
3440
3441 if (need_truncate) {
3442 rc = smb2_create_truncate(&fp->filp->f_path);
3443 if (rc)
3444 goto err_out1;
3445 }
3446
3447 if (req->CreateContextsOffset) {
3448 struct create_alloc_size_req *az_req;
3449
3450 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3451 SMB2_CREATE_ALLOCATION_SIZE, 4);
3452 if (IS_ERR(az_req)) {
3453 rc = PTR_ERR(az_req);
3454 goto err_out1;
3455 } else if (az_req) {
3456 loff_t alloc_size;
3457 int err;
3458
3459 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3460 le32_to_cpu(az_req->ccontext.DataLength) <
3461 sizeof(struct create_alloc_size_req)) {
3462 rc = -EINVAL;
3463 goto err_out1;
3464 }
3465 alloc_size = le64_to_cpu(az_req->AllocationSize);
3466 ksmbd_debug(SMB,
3467 "request smb2 create allocate size : %llu\n",
3468 alloc_size);
3469 smb_break_all_levII_oplock(work, fp, 1);
3470 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3471 alloc_size);
3472 if (err < 0)
3473 ksmbd_debug(SMB,
3474 "vfs_fallocate is failed : %d\n",
3475 err);
3476 }
3477
3478 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3479 if (IS_ERR(context)) {
3480 rc = PTR_ERR(context);
3481 goto err_out1;
3482 } else if (context) {
3483 ksmbd_debug(SMB, "get query on disk id context\n");
3484 query_disk_id = 1;
3485 }
3486 }
3487
3488 rc = ksmbd_vfs_getattr(&path, &stat);
3489 if (rc)
3490 goto err_out1;
3491
3492 if (stat.result_mask & STATX_BTIME)
3493 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3494 else
3495 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3496 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3497 fp->f_ci->m_fattr =
3498 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3499
3500 if (!created)
3501 smb2_update_xattrs(tcon, &path, fp);
3502 else
3503 smb2_new_xattrs(tcon, &path, fp);
3504
3505 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3506
3507 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3508 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3509 test_share_config_flag(work->tcon->share_conf,
3510 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3511 fp->is_persistent = true;
3512 else
3513 fp->is_durable = true;
3514
3515 if (dh_info.type == DURABLE_REQ_V2) {
3516 memcpy(fp->create_guid, dh_info.CreateGuid,
3517 SMB2_CREATE_GUID_SIZE);
3518 if (dh_info.timeout)
3519 fp->durable_timeout = min(dh_info.timeout,
3520 300000);
3521 else
3522 fp->durable_timeout = 60;
3523 }
3524 }
3525
3526 reconnected_fp:
3527 rsp->StructureSize = cpu_to_le16(89);
3528 rcu_read_lock();
3529 opinfo = rcu_dereference(fp->f_opinfo);
3530 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3531 rcu_read_unlock();
3532 rsp->Flags = 0;
3533 rsp->CreateAction = cpu_to_le32(file_info);
3534 rsp->CreationTime = cpu_to_le64(fp->create_time);
3535 time = ksmbd_UnixTimeToNT(stat.atime);
3536 rsp->LastAccessTime = cpu_to_le64(time);
3537 time = ksmbd_UnixTimeToNT(stat.mtime);
3538 rsp->LastWriteTime = cpu_to_le64(time);
3539 time = ksmbd_UnixTimeToNT(stat.ctime);
3540 rsp->ChangeTime = cpu_to_le64(time);
3541 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3542 cpu_to_le64(stat.blocks << 9);
3543 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3544 rsp->FileAttributes = fp->f_ci->m_fattr;
3545
3546 rsp->Reserved2 = 0;
3547
3548 rsp->PersistentFileId = fp->persistent_id;
3549 rsp->VolatileFileId = fp->volatile_id;
3550
3551 rsp->CreateContextsOffset = 0;
3552 rsp->CreateContextsLength = 0;
3553 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3554
3555 /* If lease is request send lease context response */
3556 if (opinfo && opinfo->is_lease) {
3557 struct create_context *lease_ccontext;
3558
3559 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3560 name, opinfo->o_lease->state);
3561 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3562
3563 lease_ccontext = (struct create_context *)rsp->Buffer;
3564 contxt_cnt++;
3565 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3566 le32_add_cpu(&rsp->CreateContextsLength,
3567 conn->vals->create_lease_size);
3568 iov_len += conn->vals->create_lease_size;
3569 next_ptr = &lease_ccontext->Next;
3570 next_off = conn->vals->create_lease_size;
3571 }
3572
3573 if (maximal_access_ctxt) {
3574 struct create_context *mxac_ccontext;
3575
3576 if (maximal_access == 0)
3577 ksmbd_vfs_query_maximal_access(idmap,
3578 path.dentry,
3579 &maximal_access);
3580 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3581 le32_to_cpu(rsp->CreateContextsLength));
3582 contxt_cnt++;
3583 create_mxac_rsp_buf(rsp->Buffer +
3584 le32_to_cpu(rsp->CreateContextsLength),
3585 le32_to_cpu(maximal_access));
3586 le32_add_cpu(&rsp->CreateContextsLength,
3587 conn->vals->create_mxac_size);
3588 iov_len += conn->vals->create_mxac_size;
3589 if (next_ptr)
3590 *next_ptr = cpu_to_le32(next_off);
3591 next_ptr = &mxac_ccontext->Next;
3592 next_off = conn->vals->create_mxac_size;
3593 }
3594
3595 if (query_disk_id) {
3596 struct create_context *disk_id_ccontext;
3597
3598 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3599 le32_to_cpu(rsp->CreateContextsLength));
3600 contxt_cnt++;
3601 create_disk_id_rsp_buf(rsp->Buffer +
3602 le32_to_cpu(rsp->CreateContextsLength),
3603 stat.ino, tcon->id);
3604 le32_add_cpu(&rsp->CreateContextsLength,
3605 conn->vals->create_disk_id_size);
3606 iov_len += conn->vals->create_disk_id_size;
3607 if (next_ptr)
3608 *next_ptr = cpu_to_le32(next_off);
3609 next_ptr = &disk_id_ccontext->Next;
3610 next_off = conn->vals->create_disk_id_size;
3611 }
3612
3613 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3614 struct create_context *durable_ccontext;
3615
3616 durable_ccontext = (struct create_context *)(rsp->Buffer +
3617 le32_to_cpu(rsp->CreateContextsLength));
3618 contxt_cnt++;
3619 if (dh_info.type == DURABLE_REQ) {
3620 create_durable_rsp_buf(rsp->Buffer +
3621 le32_to_cpu(rsp->CreateContextsLength));
3622 le32_add_cpu(&rsp->CreateContextsLength,
3623 conn->vals->create_durable_size);
3624 iov_len += conn->vals->create_durable_size;
3625 } else {
3626 create_durable_v2_rsp_buf(rsp->Buffer +
3627 le32_to_cpu(rsp->CreateContextsLength),
3628 fp);
3629 le32_add_cpu(&rsp->CreateContextsLength,
3630 conn->vals->create_durable_v2_size);
3631 iov_len += conn->vals->create_durable_v2_size;
3632 }
3633
3634 if (next_ptr)
3635 *next_ptr = cpu_to_le32(next_off);
3636 next_ptr = &durable_ccontext->Next;
3637 next_off = conn->vals->create_durable_size;
3638 }
3639
3640 if (posix_ctxt) {
3641 contxt_cnt++;
3642 create_posix_rsp_buf(rsp->Buffer +
3643 le32_to_cpu(rsp->CreateContextsLength),
3644 fp);
3645 le32_add_cpu(&rsp->CreateContextsLength,
3646 conn->vals->create_posix_size);
3647 iov_len += conn->vals->create_posix_size;
3648 if (next_ptr)
3649 *next_ptr = cpu_to_le32(next_off);
3650 }
3651
3652 if (contxt_cnt > 0) {
3653 rsp->CreateContextsOffset =
3654 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3655 }
3656
3657 err_out:
3658 if (rc && (file_present || created))
3659 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3660
3661 err_out1:
3662 ksmbd_revert_fsids(work);
3663
3664 err_out2:
3665 if (!rc) {
3666 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3667 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3668 }
3669 if (rc) {
3670 if (rc == -EINVAL)
3671 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3672 else if (rc == -EOPNOTSUPP)
3673 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3674 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3675 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3676 else if (rc == -ENOENT)
3677 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3678 else if (rc == -EPERM)
3679 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3680 else if (rc == -EBUSY)
3681 rsp->hdr.Status = STATUS_DELETE_PENDING;
3682 else if (rc == -EBADF)
3683 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3684 else if (rc == -ENOEXEC)
3685 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3686 else if (rc == -ENXIO)
3687 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3688 else if (rc == -EEXIST)
3689 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3690 else if (rc == -EMFILE)
3691 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3692 if (!rsp->hdr.Status)
3693 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3694
3695 if (fp)
3696 ksmbd_fd_put(work, fp);
3697 smb2_set_err_rsp(work);
3698 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3699 }
3700
3701 kfree(name);
3702 kfree(lc);
3703
3704 return 0;
3705 }
3706
readdir_info_level_struct_sz(int info_level)3707 static int readdir_info_level_struct_sz(int info_level)
3708 {
3709 switch (info_level) {
3710 case FILE_FULL_DIRECTORY_INFORMATION:
3711 return sizeof(struct file_full_directory_info);
3712 case FILE_BOTH_DIRECTORY_INFORMATION:
3713 return sizeof(struct file_both_directory_info);
3714 case FILE_DIRECTORY_INFORMATION:
3715 return sizeof(struct file_directory_info);
3716 case FILE_NAMES_INFORMATION:
3717 return sizeof(struct file_names_info);
3718 case FILEID_FULL_DIRECTORY_INFORMATION:
3719 return sizeof(struct file_id_full_dir_info);
3720 case FILEID_BOTH_DIRECTORY_INFORMATION:
3721 return sizeof(struct file_id_both_directory_info);
3722 case SMB_FIND_FILE_POSIX_INFO:
3723 return sizeof(struct smb2_posix_info);
3724 default:
3725 return -EOPNOTSUPP;
3726 }
3727 }
3728
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3729 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3730 {
3731 switch (info_level) {
3732 case FILE_FULL_DIRECTORY_INFORMATION:
3733 {
3734 struct file_full_directory_info *ffdinfo;
3735
3736 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3737 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3738 d_info->name = ffdinfo->FileName;
3739 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3740 return 0;
3741 }
3742 case FILE_BOTH_DIRECTORY_INFORMATION:
3743 {
3744 struct file_both_directory_info *fbdinfo;
3745
3746 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3747 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3748 d_info->name = fbdinfo->FileName;
3749 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3750 return 0;
3751 }
3752 case FILE_DIRECTORY_INFORMATION:
3753 {
3754 struct file_directory_info *fdinfo;
3755
3756 fdinfo = (struct file_directory_info *)d_info->rptr;
3757 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3758 d_info->name = fdinfo->FileName;
3759 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3760 return 0;
3761 }
3762 case FILE_NAMES_INFORMATION:
3763 {
3764 struct file_names_info *fninfo;
3765
3766 fninfo = (struct file_names_info *)d_info->rptr;
3767 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3768 d_info->name = fninfo->FileName;
3769 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3770 return 0;
3771 }
3772 case FILEID_FULL_DIRECTORY_INFORMATION:
3773 {
3774 struct file_id_full_dir_info *dinfo;
3775
3776 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3777 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3778 d_info->name = dinfo->FileName;
3779 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3780 return 0;
3781 }
3782 case FILEID_BOTH_DIRECTORY_INFORMATION:
3783 {
3784 struct file_id_both_directory_info *fibdinfo;
3785
3786 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3787 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3788 d_info->name = fibdinfo->FileName;
3789 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3790 return 0;
3791 }
3792 case SMB_FIND_FILE_POSIX_INFO:
3793 {
3794 struct smb2_posix_info *posix_info;
3795
3796 posix_info = (struct smb2_posix_info *)d_info->rptr;
3797 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3798 d_info->name = posix_info->name;
3799 d_info->name_len = le32_to_cpu(posix_info->name_len);
3800 return 0;
3801 }
3802 default:
3803 return -EINVAL;
3804 }
3805 }
3806
3807 /**
3808 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3809 * buffer
3810 * @conn: connection instance
3811 * @info_level: smb information level
3812 * @d_info: structure included variables for query dir
3813 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3814 *
3815 * if directory has many entries, find first can't read it fully.
3816 * find next might be called multiple times to read remaining dir entries
3817 *
3818 * Return: 0 on success, otherwise error
3819 */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3820 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3821 struct ksmbd_dir_info *d_info,
3822 struct ksmbd_kstat *ksmbd_kstat)
3823 {
3824 int next_entry_offset = 0;
3825 char *conv_name;
3826 int conv_len;
3827 void *kstat;
3828 int struct_sz, rc = 0;
3829
3830 conv_name = ksmbd_convert_dir_info_name(d_info,
3831 conn->local_nls,
3832 &conv_len);
3833 if (!conv_name)
3834 return -ENOMEM;
3835
3836 /* Somehow the name has only terminating NULL bytes */
3837 if (conv_len < 0) {
3838 rc = -EINVAL;
3839 goto free_conv_name;
3840 }
3841
3842 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3843 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3844 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3845
3846 if (next_entry_offset > d_info->out_buf_len) {
3847 d_info->out_buf_len = 0;
3848 rc = -ENOSPC;
3849 goto free_conv_name;
3850 }
3851
3852 kstat = d_info->wptr;
3853 if (info_level != FILE_NAMES_INFORMATION)
3854 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3855
3856 switch (info_level) {
3857 case FILE_FULL_DIRECTORY_INFORMATION:
3858 {
3859 struct file_full_directory_info *ffdinfo;
3860
3861 ffdinfo = (struct file_full_directory_info *)kstat;
3862 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3863 ffdinfo->EaSize =
3864 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3865 if (ffdinfo->EaSize)
3866 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3867 if (d_info->hide_dot_file && d_info->name[0] == '.')
3868 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3869 memcpy(ffdinfo->FileName, conv_name, conv_len);
3870 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3871 break;
3872 }
3873 case FILE_BOTH_DIRECTORY_INFORMATION:
3874 {
3875 struct file_both_directory_info *fbdinfo;
3876
3877 fbdinfo = (struct file_both_directory_info *)kstat;
3878 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3879 fbdinfo->EaSize =
3880 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3881 if (fbdinfo->EaSize)
3882 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3883 fbdinfo->ShortNameLength = 0;
3884 fbdinfo->Reserved = 0;
3885 if (d_info->hide_dot_file && d_info->name[0] == '.')
3886 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3887 memcpy(fbdinfo->FileName, conv_name, conv_len);
3888 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3889 break;
3890 }
3891 case FILE_DIRECTORY_INFORMATION:
3892 {
3893 struct file_directory_info *fdinfo;
3894
3895 fdinfo = (struct file_directory_info *)kstat;
3896 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3897 if (d_info->hide_dot_file && d_info->name[0] == '.')
3898 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3899 memcpy(fdinfo->FileName, conv_name, conv_len);
3900 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3901 break;
3902 }
3903 case FILE_NAMES_INFORMATION:
3904 {
3905 struct file_names_info *fninfo;
3906
3907 fninfo = (struct file_names_info *)kstat;
3908 fninfo->FileNameLength = cpu_to_le32(conv_len);
3909 memcpy(fninfo->FileName, conv_name, conv_len);
3910 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3911 break;
3912 }
3913 case FILEID_FULL_DIRECTORY_INFORMATION:
3914 {
3915 struct file_id_full_dir_info *dinfo;
3916
3917 dinfo = (struct file_id_full_dir_info *)kstat;
3918 dinfo->FileNameLength = cpu_to_le32(conv_len);
3919 dinfo->EaSize =
3920 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3921 if (dinfo->EaSize)
3922 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3923 dinfo->Reserved = 0;
3924 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3925 if (d_info->hide_dot_file && d_info->name[0] == '.')
3926 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3927 memcpy(dinfo->FileName, conv_name, conv_len);
3928 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3929 break;
3930 }
3931 case FILEID_BOTH_DIRECTORY_INFORMATION:
3932 {
3933 struct file_id_both_directory_info *fibdinfo;
3934
3935 fibdinfo = (struct file_id_both_directory_info *)kstat;
3936 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3937 fibdinfo->EaSize =
3938 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3939 if (fibdinfo->EaSize)
3940 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3941 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3942 fibdinfo->ShortNameLength = 0;
3943 fibdinfo->Reserved = 0;
3944 fibdinfo->Reserved2 = cpu_to_le16(0);
3945 if (d_info->hide_dot_file && d_info->name[0] == '.')
3946 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3947 memcpy(fibdinfo->FileName, conv_name, conv_len);
3948 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3949 break;
3950 }
3951 case SMB_FIND_FILE_POSIX_INFO:
3952 {
3953 struct smb2_posix_info *posix_info;
3954 u64 time;
3955
3956 posix_info = (struct smb2_posix_info *)kstat;
3957 posix_info->Ignored = 0;
3958 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3959 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3960 posix_info->ChangeTime = cpu_to_le64(time);
3961 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3962 posix_info->LastAccessTime = cpu_to_le64(time);
3963 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3964 posix_info->LastWriteTime = cpu_to_le64(time);
3965 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3966 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3967 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3968 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3969 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3970 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3971 posix_info->DosAttributes =
3972 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3973 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3974 if (d_info->hide_dot_file && d_info->name[0] == '.')
3975 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3976 /*
3977 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3978 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3979 * sub_auth(4 * 1(num_subauth)) + RID(4).
3980 */
3981 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3982 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3983 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3984 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3985 memcpy(posix_info->name, conv_name, conv_len);
3986 posix_info->name_len = cpu_to_le32(conv_len);
3987 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3988 break;
3989 }
3990
3991 } /* switch (info_level) */
3992
3993 d_info->last_entry_offset = d_info->data_count;
3994 d_info->data_count += next_entry_offset;
3995 d_info->out_buf_len -= next_entry_offset;
3996 d_info->wptr += next_entry_offset;
3997
3998 ksmbd_debug(SMB,
3999 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4000 info_level, d_info->out_buf_len,
4001 next_entry_offset, d_info->data_count);
4002
4003 free_conv_name:
4004 kfree(conv_name);
4005 return rc;
4006 }
4007
4008 struct smb2_query_dir_private {
4009 struct ksmbd_work *work;
4010 char *search_pattern;
4011 struct ksmbd_file *dir_fp;
4012
4013 struct ksmbd_dir_info *d_info;
4014 int info_level;
4015 };
4016
lock_dir(struct ksmbd_file * dir_fp)4017 static void lock_dir(struct ksmbd_file *dir_fp)
4018 {
4019 struct dentry *dir = dir_fp->filp->f_path.dentry;
4020
4021 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4022 }
4023
unlock_dir(struct ksmbd_file * dir_fp)4024 static void unlock_dir(struct ksmbd_file *dir_fp)
4025 {
4026 struct dentry *dir = dir_fp->filp->f_path.dentry;
4027
4028 inode_unlock(d_inode(dir));
4029 }
4030
process_query_dir_entries(struct smb2_query_dir_private * priv)4031 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4032 {
4033 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
4034 struct kstat kstat;
4035 struct ksmbd_kstat ksmbd_kstat;
4036 int rc;
4037 int i;
4038
4039 for (i = 0; i < priv->d_info->num_entry; i++) {
4040 struct dentry *dent;
4041
4042 if (dentry_name(priv->d_info, priv->info_level))
4043 return -EINVAL;
4044
4045 lock_dir(priv->dir_fp);
4046 dent = lookup_one(idmap, priv->d_info->name,
4047 priv->dir_fp->filp->f_path.dentry,
4048 priv->d_info->name_len);
4049 unlock_dir(priv->dir_fp);
4050
4051 if (IS_ERR(dent)) {
4052 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4053 priv->d_info->name,
4054 PTR_ERR(dent));
4055 continue;
4056 }
4057 if (unlikely(d_is_negative(dent))) {
4058 dput(dent);
4059 ksmbd_debug(SMB, "Negative dentry `%s'\n",
4060 priv->d_info->name);
4061 continue;
4062 }
4063
4064 ksmbd_kstat.kstat = &kstat;
4065 if (priv->info_level != FILE_NAMES_INFORMATION) {
4066 rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4067 idmap,
4068 dent,
4069 &ksmbd_kstat);
4070 if (rc) {
4071 dput(dent);
4072 continue;
4073 }
4074 }
4075
4076 rc = smb2_populate_readdir_entry(priv->work->conn,
4077 priv->info_level,
4078 priv->d_info,
4079 &ksmbd_kstat);
4080 dput(dent);
4081 if (rc)
4082 return rc;
4083 }
4084 return 0;
4085 }
4086
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)4087 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4088 int info_level)
4089 {
4090 int struct_sz;
4091 int conv_len;
4092 int next_entry_offset;
4093
4094 struct_sz = readdir_info_level_struct_sz(info_level);
4095 if (struct_sz == -EOPNOTSUPP)
4096 return -EOPNOTSUPP;
4097
4098 conv_len = (d_info->name_len + 1) * 2;
4099 next_entry_offset = ALIGN(struct_sz + conv_len,
4100 KSMBD_DIR_INFO_ALIGNMENT);
4101
4102 if (next_entry_offset > d_info->out_buf_len) {
4103 d_info->out_buf_len = 0;
4104 return -ENOSPC;
4105 }
4106
4107 switch (info_level) {
4108 case FILE_FULL_DIRECTORY_INFORMATION:
4109 {
4110 struct file_full_directory_info *ffdinfo;
4111
4112 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4113 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4114 ffdinfo->FileName[d_info->name_len] = 0x00;
4115 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4116 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4117 break;
4118 }
4119 case FILE_BOTH_DIRECTORY_INFORMATION:
4120 {
4121 struct file_both_directory_info *fbdinfo;
4122
4123 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4124 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4125 fbdinfo->FileName[d_info->name_len] = 0x00;
4126 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4127 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4128 break;
4129 }
4130 case FILE_DIRECTORY_INFORMATION:
4131 {
4132 struct file_directory_info *fdinfo;
4133
4134 fdinfo = (struct file_directory_info *)d_info->wptr;
4135 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4136 fdinfo->FileName[d_info->name_len] = 0x00;
4137 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4138 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4139 break;
4140 }
4141 case FILE_NAMES_INFORMATION:
4142 {
4143 struct file_names_info *fninfo;
4144
4145 fninfo = (struct file_names_info *)d_info->wptr;
4146 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4147 fninfo->FileName[d_info->name_len] = 0x00;
4148 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4149 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4150 break;
4151 }
4152 case FILEID_FULL_DIRECTORY_INFORMATION:
4153 {
4154 struct file_id_full_dir_info *dinfo;
4155
4156 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4157 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4158 dinfo->FileName[d_info->name_len] = 0x00;
4159 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4160 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4161 break;
4162 }
4163 case FILEID_BOTH_DIRECTORY_INFORMATION:
4164 {
4165 struct file_id_both_directory_info *fibdinfo;
4166
4167 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4168 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4169 fibdinfo->FileName[d_info->name_len] = 0x00;
4170 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4171 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4172 break;
4173 }
4174 case SMB_FIND_FILE_POSIX_INFO:
4175 {
4176 struct smb2_posix_info *posix_info;
4177
4178 posix_info = (struct smb2_posix_info *)d_info->wptr;
4179 memcpy(posix_info->name, d_info->name, d_info->name_len);
4180 posix_info->name[d_info->name_len] = 0x00;
4181 posix_info->name_len = cpu_to_le32(d_info->name_len);
4182 posix_info->NextEntryOffset =
4183 cpu_to_le32(next_entry_offset);
4184 break;
4185 }
4186 } /* switch (info_level) */
4187
4188 d_info->num_entry++;
4189 d_info->out_buf_len -= next_entry_offset;
4190 d_info->wptr += next_entry_offset;
4191 return 0;
4192 }
4193
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)4194 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4195 loff_t offset, u64 ino, unsigned int d_type)
4196 {
4197 struct ksmbd_readdir_data *buf;
4198 struct smb2_query_dir_private *priv;
4199 struct ksmbd_dir_info *d_info;
4200 int rc;
4201
4202 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
4203 priv = buf->private;
4204 d_info = priv->d_info;
4205
4206 /* dot and dotdot entries are already reserved */
4207 if (!strcmp(".", name) || !strcmp("..", name))
4208 return true;
4209 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4210 return true;
4211 if (!match_pattern(name, namlen, priv->search_pattern))
4212 return true;
4213
4214 d_info->name = name;
4215 d_info->name_len = namlen;
4216 rc = reserve_populate_dentry(d_info, priv->info_level);
4217 if (rc)
4218 return false;
4219 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4220 d_info->out_buf_len = 0;
4221 return true;
4222 }
4223
verify_info_level(int info_level)4224 static int verify_info_level(int info_level)
4225 {
4226 switch (info_level) {
4227 case FILE_FULL_DIRECTORY_INFORMATION:
4228 case FILE_BOTH_DIRECTORY_INFORMATION:
4229 case FILE_DIRECTORY_INFORMATION:
4230 case FILE_NAMES_INFORMATION:
4231 case FILEID_FULL_DIRECTORY_INFORMATION:
4232 case FILEID_BOTH_DIRECTORY_INFORMATION:
4233 case SMB_FIND_FILE_POSIX_INFO:
4234 break;
4235 default:
4236 return -EOPNOTSUPP;
4237 }
4238
4239 return 0;
4240 }
4241
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4242 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4243 {
4244 int free_len;
4245
4246 free_len = (int)(work->response_sz -
4247 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4248 return free_len;
4249 }
4250
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4251 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4252 unsigned short hdr2_len,
4253 unsigned int out_buf_len)
4254 {
4255 int free_len;
4256
4257 if (out_buf_len > work->conn->vals->max_trans_size)
4258 return -EINVAL;
4259
4260 free_len = smb2_resp_buf_len(work, hdr2_len);
4261 if (free_len < 0)
4262 return -EINVAL;
4263
4264 return min_t(int, out_buf_len, free_len);
4265 }
4266
smb2_query_dir(struct ksmbd_work * work)4267 int smb2_query_dir(struct ksmbd_work *work)
4268 {
4269 struct ksmbd_conn *conn = work->conn;
4270 struct smb2_query_directory_req *req;
4271 struct smb2_query_directory_rsp *rsp;
4272 struct ksmbd_share_config *share = work->tcon->share_conf;
4273 struct ksmbd_file *dir_fp = NULL;
4274 struct ksmbd_dir_info d_info;
4275 int rc = 0;
4276 char *srch_ptr = NULL;
4277 unsigned char srch_flag;
4278 int buffer_sz;
4279 struct smb2_query_dir_private query_dir_private = {NULL, };
4280
4281 WORK_BUFFERS(work, req, rsp);
4282
4283 if (ksmbd_override_fsids(work)) {
4284 rsp->hdr.Status = STATUS_NO_MEMORY;
4285 smb2_set_err_rsp(work);
4286 return -ENOMEM;
4287 }
4288
4289 rc = verify_info_level(req->FileInformationClass);
4290 if (rc) {
4291 rc = -EFAULT;
4292 goto err_out2;
4293 }
4294
4295 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4296 if (!dir_fp) {
4297 rc = -EBADF;
4298 goto err_out2;
4299 }
4300
4301 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4302 inode_permission(file_mnt_idmap(dir_fp->filp),
4303 file_inode(dir_fp->filp),
4304 MAY_READ | MAY_EXEC)) {
4305 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4306 rc = -EACCES;
4307 goto err_out2;
4308 }
4309
4310 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4311 pr_err("can't do query dir for a file\n");
4312 rc = -EINVAL;
4313 goto err_out2;
4314 }
4315
4316 srch_flag = req->Flags;
4317 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4318 le16_to_cpu(req->FileNameLength), 1,
4319 conn->local_nls);
4320 if (IS_ERR(srch_ptr)) {
4321 ksmbd_debug(SMB, "Search Pattern not found\n");
4322 rc = -EINVAL;
4323 goto err_out2;
4324 } else {
4325 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4326 }
4327
4328 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4329 ksmbd_debug(SMB, "Restart directory scan\n");
4330 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4331 }
4332
4333 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4334 d_info.wptr = (char *)rsp->Buffer;
4335 d_info.rptr = (char *)rsp->Buffer;
4336 d_info.out_buf_len =
4337 smb2_calc_max_out_buf_len(work, 8,
4338 le32_to_cpu(req->OutputBufferLength));
4339 if (d_info.out_buf_len < 0) {
4340 rc = -EINVAL;
4341 goto err_out;
4342 }
4343 d_info.flags = srch_flag;
4344
4345 /*
4346 * reserve dot and dotdot entries in head of buffer
4347 * in first response
4348 */
4349 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4350 dir_fp, &d_info, srch_ptr,
4351 smb2_populate_readdir_entry);
4352 if (rc == -ENOSPC)
4353 rc = 0;
4354 else if (rc)
4355 goto err_out;
4356
4357 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4358 d_info.hide_dot_file = true;
4359
4360 buffer_sz = d_info.out_buf_len;
4361 d_info.rptr = d_info.wptr;
4362 query_dir_private.work = work;
4363 query_dir_private.search_pattern = srch_ptr;
4364 query_dir_private.dir_fp = dir_fp;
4365 query_dir_private.d_info = &d_info;
4366 query_dir_private.info_level = req->FileInformationClass;
4367 dir_fp->readdir_data.private = &query_dir_private;
4368 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4369
4370 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4371 /*
4372 * req->OutputBufferLength is too small to contain even one entry.
4373 * In this case, it immediately returns OutputBufferLength 0 to client.
4374 */
4375 if (!d_info.out_buf_len && !d_info.num_entry)
4376 goto no_buf_len;
4377 if (rc > 0 || rc == -ENOSPC)
4378 rc = 0;
4379 else if (rc)
4380 goto err_out;
4381
4382 d_info.wptr = d_info.rptr;
4383 d_info.out_buf_len = buffer_sz;
4384 rc = process_query_dir_entries(&query_dir_private);
4385 if (rc)
4386 goto err_out;
4387
4388 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4389 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4390 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4391 } else {
4392 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4393 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4394 }
4395 rsp->StructureSize = cpu_to_le16(9);
4396 rsp->OutputBufferOffset = cpu_to_le16(0);
4397 rsp->OutputBufferLength = cpu_to_le32(0);
4398 rsp->Buffer[0] = 0;
4399 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4400 sizeof(struct smb2_query_directory_rsp));
4401 if (rc)
4402 goto err_out;
4403 } else {
4404 no_buf_len:
4405 ((struct file_directory_info *)
4406 ((char *)rsp->Buffer + d_info.last_entry_offset))
4407 ->NextEntryOffset = 0;
4408 if (d_info.data_count >= d_info.last_entry_off_align)
4409 d_info.data_count -= d_info.last_entry_off_align;
4410
4411 rsp->StructureSize = cpu_to_le16(9);
4412 rsp->OutputBufferOffset = cpu_to_le16(72);
4413 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4414 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4415 offsetof(struct smb2_query_directory_rsp, Buffer) +
4416 d_info.data_count);
4417 if (rc)
4418 goto err_out;
4419 }
4420
4421 kfree(srch_ptr);
4422 ksmbd_fd_put(work, dir_fp);
4423 ksmbd_revert_fsids(work);
4424 return 0;
4425
4426 err_out:
4427 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4428 kfree(srch_ptr);
4429
4430 err_out2:
4431 if (rc == -EINVAL)
4432 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4433 else if (rc == -EACCES)
4434 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4435 else if (rc == -ENOENT)
4436 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4437 else if (rc == -EBADF)
4438 rsp->hdr.Status = STATUS_FILE_CLOSED;
4439 else if (rc == -ENOMEM)
4440 rsp->hdr.Status = STATUS_NO_MEMORY;
4441 else if (rc == -EFAULT)
4442 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4443 else if (rc == -EIO)
4444 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4445 if (!rsp->hdr.Status)
4446 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4447
4448 smb2_set_err_rsp(work);
4449 ksmbd_fd_put(work, dir_fp);
4450 ksmbd_revert_fsids(work);
4451 return 0;
4452 }
4453
4454 /**
4455 * buffer_check_err() - helper function to check buffer errors
4456 * @reqOutputBufferLength: max buffer length expected in command response
4457 * @rsp: query info response buffer contains output buffer length
4458 * @rsp_org: base response buffer pointer in case of chained response
4459 *
4460 * Return: 0 on success, otherwise error
4461 */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4462 static int buffer_check_err(int reqOutputBufferLength,
4463 struct smb2_query_info_rsp *rsp,
4464 void *rsp_org)
4465 {
4466 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4467 pr_err("Invalid Buffer Size Requested\n");
4468 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4469 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4470 return -EINVAL;
4471 }
4472 return 0;
4473 }
4474
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4475 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4476 void *rsp_org)
4477 {
4478 struct smb2_file_standard_info *sinfo;
4479
4480 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4481
4482 sinfo->AllocationSize = cpu_to_le64(4096);
4483 sinfo->EndOfFile = cpu_to_le64(0);
4484 sinfo->NumberOfLinks = cpu_to_le32(1);
4485 sinfo->DeletePending = 1;
4486 sinfo->Directory = 0;
4487 rsp->OutputBufferLength =
4488 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4489 }
4490
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4491 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4492 void *rsp_org)
4493 {
4494 struct smb2_file_internal_info *file_info;
4495
4496 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4497
4498 /* any unique number */
4499 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4500 rsp->OutputBufferLength =
4501 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4502 }
4503
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4504 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4505 struct smb2_query_info_req *req,
4506 struct smb2_query_info_rsp *rsp,
4507 void *rsp_org)
4508 {
4509 u64 id;
4510 int rc;
4511
4512 /*
4513 * Windows can sometime send query file info request on
4514 * pipe without opening it, checking error condition here
4515 */
4516 id = req->VolatileFileId;
4517 if (!ksmbd_session_rpc_method(sess, id))
4518 return -ENOENT;
4519
4520 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4521 req->FileInfoClass, req->VolatileFileId);
4522
4523 switch (req->FileInfoClass) {
4524 case FILE_STANDARD_INFORMATION:
4525 get_standard_info_pipe(rsp, rsp_org);
4526 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4527 rsp, rsp_org);
4528 break;
4529 case FILE_INTERNAL_INFORMATION:
4530 get_internal_info_pipe(rsp, id, rsp_org);
4531 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4532 rsp, rsp_org);
4533 break;
4534 default:
4535 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4536 req->FileInfoClass);
4537 rc = -EOPNOTSUPP;
4538 }
4539 return rc;
4540 }
4541
4542 /**
4543 * smb2_get_ea() - handler for smb2 get extended attribute command
4544 * @work: smb work containing query info command buffer
4545 * @fp: ksmbd_file pointer
4546 * @req: get extended attribute request
4547 * @rsp: response buffer pointer
4548 * @rsp_org: base response buffer pointer in case of chained response
4549 *
4550 * Return: 0 on success, otherwise error
4551 */
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)4552 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4553 struct smb2_query_info_req *req,
4554 struct smb2_query_info_rsp *rsp, void *rsp_org)
4555 {
4556 struct smb2_ea_info *eainfo, *prev_eainfo;
4557 char *name, *ptr, *xattr_list = NULL, *buf;
4558 int rc, name_len, value_len, xattr_list_len, idx;
4559 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4560 struct smb2_ea_info_req *ea_req = NULL;
4561 const struct path *path;
4562 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4563
4564 if (!(fp->daccess & FILE_READ_EA_LE)) {
4565 pr_err("Not permitted to read ext attr : 0x%x\n",
4566 fp->daccess);
4567 return -EACCES;
4568 }
4569
4570 path = &fp->filp->f_path;
4571 /* single EA entry is requested with given user.* name */
4572 if (req->InputBufferLength) {
4573 if (le32_to_cpu(req->InputBufferLength) <
4574 sizeof(struct smb2_ea_info_req))
4575 return -EINVAL;
4576
4577 ea_req = (struct smb2_ea_info_req *)((char *)req +
4578 le16_to_cpu(req->InputBufferOffset));
4579 } else {
4580 /* need to send all EAs, if no specific EA is requested*/
4581 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4582 ksmbd_debug(SMB,
4583 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4584 le32_to_cpu(req->Flags));
4585 }
4586
4587 buf_free_len =
4588 smb2_calc_max_out_buf_len(work, 8,
4589 le32_to_cpu(req->OutputBufferLength));
4590 if (buf_free_len < 0)
4591 return -EINVAL;
4592
4593 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4594 if (rc < 0) {
4595 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4596 goto out;
4597 } else if (!rc) { /* there is no EA in the file */
4598 ksmbd_debug(SMB, "no ea data in the file\n");
4599 goto done;
4600 }
4601 xattr_list_len = rc;
4602
4603 ptr = (char *)rsp->Buffer;
4604 eainfo = (struct smb2_ea_info *)ptr;
4605 prev_eainfo = eainfo;
4606 idx = 0;
4607
4608 while (idx < xattr_list_len) {
4609 name = xattr_list + idx;
4610 name_len = strlen(name);
4611
4612 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4613 idx += name_len + 1;
4614
4615 /*
4616 * CIFS does not support EA other than user.* namespace,
4617 * still keep the framework generic, to list other attrs
4618 * in future.
4619 */
4620 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4621 continue;
4622
4623 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4624 STREAM_PREFIX_LEN))
4625 continue;
4626
4627 if (req->InputBufferLength &&
4628 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4629 ea_req->EaNameLength))
4630 continue;
4631
4632 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4633 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4634 continue;
4635
4636 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4637 name_len -= XATTR_USER_PREFIX_LEN;
4638
4639 ptr = eainfo->name + name_len + 1;
4640 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4641 name_len + 1);
4642 /* bailout if xattr can't fit in buf_free_len */
4643 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4644 name, &buf);
4645 if (value_len <= 0) {
4646 rc = -ENOENT;
4647 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4648 goto out;
4649 }
4650
4651 buf_free_len -= value_len;
4652 if (buf_free_len < 0) {
4653 kfree(buf);
4654 break;
4655 }
4656
4657 memcpy(ptr, buf, value_len);
4658 kfree(buf);
4659
4660 ptr += value_len;
4661 eainfo->Flags = 0;
4662 eainfo->EaNameLength = name_len;
4663
4664 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4665 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4666 name_len);
4667 else
4668 memcpy(eainfo->name, name, name_len);
4669
4670 eainfo->name[name_len] = '\0';
4671 eainfo->EaValueLength = cpu_to_le16(value_len);
4672 next_offset = offsetof(struct smb2_ea_info, name) +
4673 name_len + 1 + value_len;
4674
4675 /* align next xattr entry at 4 byte bundary */
4676 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4677 if (alignment_bytes) {
4678 memset(ptr, '\0', alignment_bytes);
4679 ptr += alignment_bytes;
4680 next_offset += alignment_bytes;
4681 buf_free_len -= alignment_bytes;
4682 }
4683 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4684 prev_eainfo = eainfo;
4685 eainfo = (struct smb2_ea_info *)ptr;
4686 rsp_data_cnt += next_offset;
4687
4688 if (req->InputBufferLength) {
4689 ksmbd_debug(SMB, "single entry requested\n");
4690 break;
4691 }
4692 }
4693
4694 /* no more ea entries */
4695 prev_eainfo->NextEntryOffset = 0;
4696 done:
4697 rc = 0;
4698 if (rsp_data_cnt == 0)
4699 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4700 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4701 out:
4702 kvfree(xattr_list);
4703 return rc;
4704 }
4705
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4706 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4707 struct ksmbd_file *fp, void *rsp_org)
4708 {
4709 struct smb2_file_access_info *file_info;
4710
4711 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4712 file_info->AccessFlags = fp->daccess;
4713 rsp->OutputBufferLength =
4714 cpu_to_le32(sizeof(struct smb2_file_access_info));
4715 }
4716
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4717 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4718 struct ksmbd_file *fp, void *rsp_org)
4719 {
4720 struct smb2_file_basic_info *basic_info;
4721 struct kstat stat;
4722 u64 time;
4723 int ret;
4724
4725 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4726 pr_err("no right to read the attributes : 0x%x\n",
4727 fp->daccess);
4728 return -EACCES;
4729 }
4730
4731 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4732 AT_STATX_SYNC_AS_STAT);
4733 if (ret)
4734 return ret;
4735
4736 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4737 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4738 time = ksmbd_UnixTimeToNT(stat.atime);
4739 basic_info->LastAccessTime = cpu_to_le64(time);
4740 time = ksmbd_UnixTimeToNT(stat.mtime);
4741 basic_info->LastWriteTime = cpu_to_le64(time);
4742 time = ksmbd_UnixTimeToNT(stat.ctime);
4743 basic_info->ChangeTime = cpu_to_le64(time);
4744 basic_info->Attributes = fp->f_ci->m_fattr;
4745 basic_info->Pad1 = 0;
4746 rsp->OutputBufferLength =
4747 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4748 return 0;
4749 }
4750
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4751 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4752 struct ksmbd_file *fp, void *rsp_org)
4753 {
4754 struct smb2_file_standard_info *sinfo;
4755 unsigned int delete_pending;
4756 struct kstat stat;
4757 int ret;
4758
4759 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4760 AT_STATX_SYNC_AS_STAT);
4761 if (ret)
4762 return ret;
4763
4764 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4765 delete_pending = ksmbd_inode_pending_delete(fp);
4766
4767 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4768 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4769 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4770 sinfo->DeletePending = delete_pending;
4771 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4772 rsp->OutputBufferLength =
4773 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4774
4775 return 0;
4776 }
4777
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4778 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4779 void *rsp_org)
4780 {
4781 struct smb2_file_alignment_info *file_info;
4782
4783 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4784 file_info->AlignmentRequirement = 0;
4785 rsp->OutputBufferLength =
4786 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4787 }
4788
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4789 static int get_file_all_info(struct ksmbd_work *work,
4790 struct smb2_query_info_rsp *rsp,
4791 struct ksmbd_file *fp,
4792 void *rsp_org)
4793 {
4794 struct ksmbd_conn *conn = work->conn;
4795 struct smb2_file_all_info *file_info;
4796 unsigned int delete_pending;
4797 struct kstat stat;
4798 int conv_len;
4799 char *filename;
4800 u64 time;
4801 int ret;
4802
4803 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4804 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4805 fp->daccess);
4806 return -EACCES;
4807 }
4808
4809 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4810 if (IS_ERR(filename))
4811 return PTR_ERR(filename);
4812
4813 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4814 AT_STATX_SYNC_AS_STAT);
4815 if (ret)
4816 return ret;
4817
4818 ksmbd_debug(SMB, "filename = %s\n", filename);
4819 delete_pending = ksmbd_inode_pending_delete(fp);
4820 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4821
4822 file_info->CreationTime = cpu_to_le64(fp->create_time);
4823 time = ksmbd_UnixTimeToNT(stat.atime);
4824 file_info->LastAccessTime = cpu_to_le64(time);
4825 time = ksmbd_UnixTimeToNT(stat.mtime);
4826 file_info->LastWriteTime = cpu_to_le64(time);
4827 time = ksmbd_UnixTimeToNT(stat.ctime);
4828 file_info->ChangeTime = cpu_to_le64(time);
4829 file_info->Attributes = fp->f_ci->m_fattr;
4830 file_info->Pad1 = 0;
4831 file_info->AllocationSize =
4832 cpu_to_le64(stat.blocks << 9);
4833 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4834 file_info->NumberOfLinks =
4835 cpu_to_le32(get_nlink(&stat) - delete_pending);
4836 file_info->DeletePending = delete_pending;
4837 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4838 file_info->Pad2 = 0;
4839 file_info->IndexNumber = cpu_to_le64(stat.ino);
4840 file_info->EASize = 0;
4841 file_info->AccessFlags = fp->daccess;
4842 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4843 file_info->Mode = fp->coption;
4844 file_info->AlignmentRequirement = 0;
4845 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4846 PATH_MAX, conn->local_nls, 0);
4847 conv_len *= 2;
4848 file_info->FileNameLength = cpu_to_le32(conv_len);
4849 rsp->OutputBufferLength =
4850 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4851 kfree(filename);
4852 return 0;
4853 }
4854
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4855 static void get_file_alternate_info(struct ksmbd_work *work,
4856 struct smb2_query_info_rsp *rsp,
4857 struct ksmbd_file *fp,
4858 void *rsp_org)
4859 {
4860 struct ksmbd_conn *conn = work->conn;
4861 struct smb2_file_alt_name_info *file_info;
4862 struct dentry *dentry = fp->filp->f_path.dentry;
4863 int conv_len;
4864
4865 spin_lock(&dentry->d_lock);
4866 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4867 conv_len = ksmbd_extract_shortname(conn,
4868 dentry->d_name.name,
4869 file_info->FileName);
4870 spin_unlock(&dentry->d_lock);
4871 file_info->FileNameLength = cpu_to_le32(conv_len);
4872 rsp->OutputBufferLength =
4873 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4874 }
4875
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4876 static int get_file_stream_info(struct ksmbd_work *work,
4877 struct smb2_query_info_rsp *rsp,
4878 struct ksmbd_file *fp,
4879 void *rsp_org)
4880 {
4881 struct ksmbd_conn *conn = work->conn;
4882 struct smb2_file_stream_info *file_info;
4883 char *stream_name, *xattr_list = NULL, *stream_buf;
4884 struct kstat stat;
4885 const struct path *path = &fp->filp->f_path;
4886 ssize_t xattr_list_len;
4887 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4888 int buf_free_len;
4889 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4890 int ret;
4891
4892 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4893 AT_STATX_SYNC_AS_STAT);
4894 if (ret)
4895 return ret;
4896
4897 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4898
4899 buf_free_len =
4900 smb2_calc_max_out_buf_len(work, 8,
4901 le32_to_cpu(req->OutputBufferLength));
4902 if (buf_free_len < 0)
4903 goto out;
4904
4905 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4906 if (xattr_list_len < 0) {
4907 goto out;
4908 } else if (!xattr_list_len) {
4909 ksmbd_debug(SMB, "empty xattr in the file\n");
4910 goto out;
4911 }
4912
4913 while (idx < xattr_list_len) {
4914 stream_name = xattr_list + idx;
4915 streamlen = strlen(stream_name);
4916 idx += streamlen + 1;
4917
4918 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4919
4920 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4921 STREAM_PREFIX, STREAM_PREFIX_LEN))
4922 continue;
4923
4924 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4925 STREAM_PREFIX_LEN);
4926 streamlen = stream_name_len;
4927
4928 /* plus : size */
4929 streamlen += 1;
4930 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4931 if (!stream_buf)
4932 break;
4933
4934 streamlen = snprintf(stream_buf, streamlen + 1,
4935 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4936
4937 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4938 if (next > buf_free_len) {
4939 kfree(stream_buf);
4940 break;
4941 }
4942
4943 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4944 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4945 stream_buf, streamlen,
4946 conn->local_nls, 0);
4947 streamlen *= 2;
4948 kfree(stream_buf);
4949 file_info->StreamNameLength = cpu_to_le32(streamlen);
4950 file_info->StreamSize = cpu_to_le64(stream_name_len);
4951 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4952
4953 nbytes += next;
4954 buf_free_len -= next;
4955 file_info->NextEntryOffset = cpu_to_le32(next);
4956 }
4957
4958 out:
4959 if (!S_ISDIR(stat.mode) &&
4960 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4961 file_info = (struct smb2_file_stream_info *)
4962 &rsp->Buffer[nbytes];
4963 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4964 "::$DATA", 7, conn->local_nls, 0);
4965 streamlen *= 2;
4966 file_info->StreamNameLength = cpu_to_le32(streamlen);
4967 file_info->StreamSize = cpu_to_le64(stat.size);
4968 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4969 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4970 }
4971
4972 /* last entry offset should be 0 */
4973 file_info->NextEntryOffset = 0;
4974 kvfree(xattr_list);
4975
4976 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4977
4978 return 0;
4979 }
4980
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4981 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
4982 struct ksmbd_file *fp, void *rsp_org)
4983 {
4984 struct smb2_file_internal_info *file_info;
4985 struct kstat stat;
4986 int ret;
4987
4988 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4989 AT_STATX_SYNC_AS_STAT);
4990 if (ret)
4991 return ret;
4992
4993 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4994 file_info->IndexNumber = cpu_to_le64(stat.ino);
4995 rsp->OutputBufferLength =
4996 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4997
4998 return 0;
4999 }
5000
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5001 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5002 struct ksmbd_file *fp, void *rsp_org)
5003 {
5004 struct smb2_file_ntwrk_info *file_info;
5005 struct kstat stat;
5006 u64 time;
5007 int ret;
5008
5009 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5010 pr_err("no right to read the attributes : 0x%x\n",
5011 fp->daccess);
5012 return -EACCES;
5013 }
5014
5015 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5016 AT_STATX_SYNC_AS_STAT);
5017 if (ret)
5018 return ret;
5019
5020 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5021
5022 file_info->CreationTime = cpu_to_le64(fp->create_time);
5023 time = ksmbd_UnixTimeToNT(stat.atime);
5024 file_info->LastAccessTime = cpu_to_le64(time);
5025 time = ksmbd_UnixTimeToNT(stat.mtime);
5026 file_info->LastWriteTime = cpu_to_le64(time);
5027 time = ksmbd_UnixTimeToNT(stat.ctime);
5028 file_info->ChangeTime = cpu_to_le64(time);
5029 file_info->Attributes = fp->f_ci->m_fattr;
5030 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5031 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5032 file_info->Reserved = cpu_to_le32(0);
5033 rsp->OutputBufferLength =
5034 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5035 return 0;
5036 }
5037
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)5038 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5039 {
5040 struct smb2_file_ea_info *file_info;
5041
5042 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5043 file_info->EASize = 0;
5044 rsp->OutputBufferLength =
5045 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5046 }
5047
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5048 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5049 struct ksmbd_file *fp, void *rsp_org)
5050 {
5051 struct smb2_file_pos_info *file_info;
5052
5053 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5054 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5055 rsp->OutputBufferLength =
5056 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5057 }
5058
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5059 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5060 struct ksmbd_file *fp, void *rsp_org)
5061 {
5062 struct smb2_file_mode_info *file_info;
5063
5064 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5065 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5066 rsp->OutputBufferLength =
5067 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5068 }
5069
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5070 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5071 struct ksmbd_file *fp, void *rsp_org)
5072 {
5073 struct smb2_file_comp_info *file_info;
5074 struct kstat stat;
5075 int ret;
5076
5077 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5078 AT_STATX_SYNC_AS_STAT);
5079 if (ret)
5080 return ret;
5081
5082 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5083 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5084 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5085 file_info->CompressionUnitShift = 0;
5086 file_info->ChunkShift = 0;
5087 file_info->ClusterShift = 0;
5088 memset(&file_info->Reserved[0], 0, 3);
5089
5090 rsp->OutputBufferLength =
5091 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5092
5093 return 0;
5094 }
5095
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5096 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5097 struct ksmbd_file *fp, void *rsp_org)
5098 {
5099 struct smb2_file_attr_tag_info *file_info;
5100
5101 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5102 pr_err("no right to read the attributes : 0x%x\n",
5103 fp->daccess);
5104 return -EACCES;
5105 }
5106
5107 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5108 file_info->FileAttributes = fp->f_ci->m_fattr;
5109 file_info->ReparseTag = 0;
5110 rsp->OutputBufferLength =
5111 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5112 return 0;
5113 }
5114
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5115 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5116 struct ksmbd_file *fp, void *rsp_org)
5117 {
5118 struct smb311_posix_qinfo *file_info;
5119 struct inode *inode = file_inode(fp->filp);
5120 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5121 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5122 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5123 struct kstat stat;
5124 u64 time;
5125 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5126 int ret;
5127
5128 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5129 AT_STATX_SYNC_AS_STAT);
5130 if (ret)
5131 return ret;
5132
5133 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5134 file_info->CreationTime = cpu_to_le64(fp->create_time);
5135 time = ksmbd_UnixTimeToNT(stat.atime);
5136 file_info->LastAccessTime = cpu_to_le64(time);
5137 time = ksmbd_UnixTimeToNT(stat.mtime);
5138 file_info->LastWriteTime = cpu_to_le64(time);
5139 time = ksmbd_UnixTimeToNT(stat.ctime);
5140 file_info->ChangeTime = cpu_to_le64(time);
5141 file_info->DosAttributes = fp->f_ci->m_fattr;
5142 file_info->Inode = cpu_to_le64(stat.ino);
5143 file_info->EndOfFile = cpu_to_le64(stat.size);
5144 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5145 file_info->HardLinks = cpu_to_le32(stat.nlink);
5146 file_info->Mode = cpu_to_le32(stat.mode & 0777);
5147 file_info->DeviceId = cpu_to_le32(stat.rdev);
5148
5149 /*
5150 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5151 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5152 * sub_auth(4 * 1(num_subauth)) + RID(4).
5153 */
5154 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5155 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5156 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5157 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5158
5159 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5160
5161 return 0;
5162 }
5163
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5164 static int smb2_get_info_file(struct ksmbd_work *work,
5165 struct smb2_query_info_req *req,
5166 struct smb2_query_info_rsp *rsp)
5167 {
5168 struct ksmbd_file *fp;
5169 int fileinfoclass = 0;
5170 int rc = 0;
5171 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5172
5173 if (test_share_config_flag(work->tcon->share_conf,
5174 KSMBD_SHARE_FLAG_PIPE)) {
5175 /* smb2 info file called for pipe */
5176 return smb2_get_info_file_pipe(work->sess, req, rsp,
5177 work->response_buf);
5178 }
5179
5180 if (work->next_smb2_rcv_hdr_off) {
5181 if (!has_file_id(req->VolatileFileId)) {
5182 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5183 work->compound_fid);
5184 id = work->compound_fid;
5185 pid = work->compound_pfid;
5186 }
5187 }
5188
5189 if (!has_file_id(id)) {
5190 id = req->VolatileFileId;
5191 pid = req->PersistentFileId;
5192 }
5193
5194 fp = ksmbd_lookup_fd_slow(work, id, pid);
5195 if (!fp)
5196 return -ENOENT;
5197
5198 fileinfoclass = req->FileInfoClass;
5199
5200 switch (fileinfoclass) {
5201 case FILE_ACCESS_INFORMATION:
5202 get_file_access_info(rsp, fp, work->response_buf);
5203 break;
5204
5205 case FILE_BASIC_INFORMATION:
5206 rc = get_file_basic_info(rsp, fp, work->response_buf);
5207 break;
5208
5209 case FILE_STANDARD_INFORMATION:
5210 rc = get_file_standard_info(rsp, fp, work->response_buf);
5211 break;
5212
5213 case FILE_ALIGNMENT_INFORMATION:
5214 get_file_alignment_info(rsp, work->response_buf);
5215 break;
5216
5217 case FILE_ALL_INFORMATION:
5218 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5219 break;
5220
5221 case FILE_ALTERNATE_NAME_INFORMATION:
5222 get_file_alternate_info(work, rsp, fp, work->response_buf);
5223 break;
5224
5225 case FILE_STREAM_INFORMATION:
5226 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5227 break;
5228
5229 case FILE_INTERNAL_INFORMATION:
5230 rc = get_file_internal_info(rsp, fp, work->response_buf);
5231 break;
5232
5233 case FILE_NETWORK_OPEN_INFORMATION:
5234 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5235 break;
5236
5237 case FILE_EA_INFORMATION:
5238 get_file_ea_info(rsp, work->response_buf);
5239 break;
5240
5241 case FILE_FULL_EA_INFORMATION:
5242 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5243 break;
5244
5245 case FILE_POSITION_INFORMATION:
5246 get_file_position_info(rsp, fp, work->response_buf);
5247 break;
5248
5249 case FILE_MODE_INFORMATION:
5250 get_file_mode_info(rsp, fp, work->response_buf);
5251 break;
5252
5253 case FILE_COMPRESSION_INFORMATION:
5254 rc = get_file_compression_info(rsp, fp, work->response_buf);
5255 break;
5256
5257 case FILE_ATTRIBUTE_TAG_INFORMATION:
5258 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5259 break;
5260 case SMB_FIND_FILE_POSIX_INFO:
5261 if (!work->tcon->posix_extensions) {
5262 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5263 rc = -EOPNOTSUPP;
5264 } else {
5265 rc = find_file_posix_info(rsp, fp, work->response_buf);
5266 }
5267 break;
5268 default:
5269 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5270 fileinfoclass);
5271 rc = -EOPNOTSUPP;
5272 }
5273 if (!rc)
5274 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5275 rsp, work->response_buf);
5276 ksmbd_fd_put(work, fp);
5277 return rc;
5278 }
5279
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5280 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5281 struct smb2_query_info_req *req,
5282 struct smb2_query_info_rsp *rsp)
5283 {
5284 struct ksmbd_session *sess = work->sess;
5285 struct ksmbd_conn *conn = work->conn;
5286 struct ksmbd_share_config *share = work->tcon->share_conf;
5287 int fsinfoclass = 0;
5288 struct kstatfs stfs;
5289 struct path path;
5290 int rc = 0, len;
5291
5292 if (!share->path)
5293 return -EIO;
5294
5295 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5296 if (rc) {
5297 pr_err("cannot create vfs path\n");
5298 return -EIO;
5299 }
5300
5301 rc = vfs_statfs(&path, &stfs);
5302 if (rc) {
5303 pr_err("cannot do stat of path %s\n", share->path);
5304 path_put(&path);
5305 return -EIO;
5306 }
5307
5308 fsinfoclass = req->FileInfoClass;
5309
5310 switch (fsinfoclass) {
5311 case FS_DEVICE_INFORMATION:
5312 {
5313 struct filesystem_device_info *info;
5314
5315 info = (struct filesystem_device_info *)rsp->Buffer;
5316
5317 info->DeviceType = cpu_to_le32(stfs.f_type);
5318 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5319 rsp->OutputBufferLength = cpu_to_le32(8);
5320 break;
5321 }
5322 case FS_ATTRIBUTE_INFORMATION:
5323 {
5324 struct filesystem_attribute_info *info;
5325 size_t sz;
5326
5327 info = (struct filesystem_attribute_info *)rsp->Buffer;
5328 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5329 FILE_PERSISTENT_ACLS |
5330 FILE_UNICODE_ON_DISK |
5331 FILE_CASE_PRESERVED_NAMES |
5332 FILE_CASE_SENSITIVE_SEARCH |
5333 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5334
5335 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5336
5337 if (test_share_config_flag(work->tcon->share_conf,
5338 KSMBD_SHARE_FLAG_STREAMS))
5339 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5340
5341 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5342 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5343 "NTFS", PATH_MAX, conn->local_nls, 0);
5344 len = len * 2;
5345 info->FileSystemNameLen = cpu_to_le32(len);
5346 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5347 rsp->OutputBufferLength = cpu_to_le32(sz);
5348 break;
5349 }
5350 case FS_VOLUME_INFORMATION:
5351 {
5352 struct filesystem_vol_info *info;
5353 size_t sz;
5354 unsigned int serial_crc = 0;
5355
5356 info = (struct filesystem_vol_info *)(rsp->Buffer);
5357 info->VolumeCreationTime = 0;
5358 serial_crc = crc32_le(serial_crc, share->name,
5359 strlen(share->name));
5360 serial_crc = crc32_le(serial_crc, share->path,
5361 strlen(share->path));
5362 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5363 strlen(ksmbd_netbios_name()));
5364 /* Taking dummy value of serial number*/
5365 info->SerialNumber = cpu_to_le32(serial_crc);
5366 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5367 share->name, PATH_MAX,
5368 conn->local_nls, 0);
5369 len = len * 2;
5370 info->VolumeLabelSize = cpu_to_le32(len);
5371 info->Reserved = 0;
5372 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5373 rsp->OutputBufferLength = cpu_to_le32(sz);
5374 break;
5375 }
5376 case FS_SIZE_INFORMATION:
5377 {
5378 struct filesystem_info *info;
5379
5380 info = (struct filesystem_info *)(rsp->Buffer);
5381 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5382 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5383 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5384 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5385 rsp->OutputBufferLength = cpu_to_le32(24);
5386 break;
5387 }
5388 case FS_FULL_SIZE_INFORMATION:
5389 {
5390 struct smb2_fs_full_size_info *info;
5391
5392 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5393 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5394 info->CallerAvailableAllocationUnits =
5395 cpu_to_le64(stfs.f_bavail);
5396 info->ActualAvailableAllocationUnits =
5397 cpu_to_le64(stfs.f_bfree);
5398 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5399 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5400 rsp->OutputBufferLength = cpu_to_le32(32);
5401 break;
5402 }
5403 case FS_OBJECT_ID_INFORMATION:
5404 {
5405 struct object_id_info *info;
5406
5407 info = (struct object_id_info *)(rsp->Buffer);
5408
5409 if (!user_guest(sess->user))
5410 memcpy(info->objid, user_passkey(sess->user), 16);
5411 else
5412 memset(info->objid, 0, 16);
5413
5414 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5415 info->extended_info.version = cpu_to_le32(1);
5416 info->extended_info.release = cpu_to_le32(1);
5417 info->extended_info.rel_date = 0;
5418 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5419 rsp->OutputBufferLength = cpu_to_le32(64);
5420 break;
5421 }
5422 case FS_SECTOR_SIZE_INFORMATION:
5423 {
5424 struct smb3_fs_ss_info *info;
5425 unsigned int sector_size =
5426 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5427
5428 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5429
5430 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5431 info->PhysicalBytesPerSectorForAtomicity =
5432 cpu_to_le32(sector_size);
5433 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5434 info->FSEffPhysicalBytesPerSectorForAtomicity =
5435 cpu_to_le32(sector_size);
5436 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5437 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5438 info->ByteOffsetForSectorAlignment = 0;
5439 info->ByteOffsetForPartitionAlignment = 0;
5440 rsp->OutputBufferLength = cpu_to_le32(28);
5441 break;
5442 }
5443 case FS_CONTROL_INFORMATION:
5444 {
5445 /*
5446 * TODO : The current implementation is based on
5447 * test result with win7(NTFS) server. It's need to
5448 * modify this to get valid Quota values
5449 * from Linux kernel
5450 */
5451 struct smb2_fs_control_info *info;
5452
5453 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5454 info->FreeSpaceStartFiltering = 0;
5455 info->FreeSpaceThreshold = 0;
5456 info->FreeSpaceStopFiltering = 0;
5457 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5458 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5459 info->Padding = 0;
5460 rsp->OutputBufferLength = cpu_to_le32(48);
5461 break;
5462 }
5463 case FS_POSIX_INFORMATION:
5464 {
5465 struct filesystem_posix_info *info;
5466
5467 if (!work->tcon->posix_extensions) {
5468 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5469 rc = -EOPNOTSUPP;
5470 } else {
5471 info = (struct filesystem_posix_info *)(rsp->Buffer);
5472 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5473 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5474 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5475 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5476 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5477 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5478 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5479 rsp->OutputBufferLength = cpu_to_le32(56);
5480 }
5481 break;
5482 }
5483 default:
5484 path_put(&path);
5485 return -EOPNOTSUPP;
5486 }
5487 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5488 rsp, work->response_buf);
5489 path_put(&path);
5490 return rc;
5491 }
5492
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5493 static int smb2_get_info_sec(struct ksmbd_work *work,
5494 struct smb2_query_info_req *req,
5495 struct smb2_query_info_rsp *rsp)
5496 {
5497 struct ksmbd_file *fp;
5498 struct mnt_idmap *idmap;
5499 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5500 struct smb_fattr fattr = {{0}};
5501 struct inode *inode;
5502 __u32 secdesclen = 0;
5503 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5504 int addition_info = le32_to_cpu(req->AdditionalInformation);
5505 int rc = 0, ppntsd_size = 0;
5506
5507 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5508 PROTECTED_DACL_SECINFO |
5509 UNPROTECTED_DACL_SECINFO)) {
5510 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5511 addition_info);
5512
5513 pntsd->revision = cpu_to_le16(1);
5514 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5515 pntsd->osidoffset = 0;
5516 pntsd->gsidoffset = 0;
5517 pntsd->sacloffset = 0;
5518 pntsd->dacloffset = 0;
5519
5520 secdesclen = sizeof(struct smb_ntsd);
5521 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5522
5523 return 0;
5524 }
5525
5526 if (work->next_smb2_rcv_hdr_off) {
5527 if (!has_file_id(req->VolatileFileId)) {
5528 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5529 work->compound_fid);
5530 id = work->compound_fid;
5531 pid = work->compound_pfid;
5532 }
5533 }
5534
5535 if (!has_file_id(id)) {
5536 id = req->VolatileFileId;
5537 pid = req->PersistentFileId;
5538 }
5539
5540 fp = ksmbd_lookup_fd_slow(work, id, pid);
5541 if (!fp)
5542 return -ENOENT;
5543
5544 idmap = file_mnt_idmap(fp->filp);
5545 inode = file_inode(fp->filp);
5546 ksmbd_acls_fattr(&fattr, idmap, inode);
5547
5548 if (test_share_config_flag(work->tcon->share_conf,
5549 KSMBD_SHARE_FLAG_ACL_XATTR))
5550 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5551 fp->filp->f_path.dentry,
5552 &ppntsd);
5553
5554 /* Check if sd buffer size exceeds response buffer size */
5555 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5556 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5557 addition_info, &secdesclen, &fattr);
5558 posix_acl_release(fattr.cf_acls);
5559 posix_acl_release(fattr.cf_dacls);
5560 kfree(ppntsd);
5561 ksmbd_fd_put(work, fp);
5562 if (rc)
5563 return rc;
5564
5565 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5566 return 0;
5567 }
5568
5569 /**
5570 * smb2_query_info() - handler for smb2 query info command
5571 * @work: smb work containing query info request buffer
5572 *
5573 * Return: 0 on success, otherwise error
5574 */
smb2_query_info(struct ksmbd_work * work)5575 int smb2_query_info(struct ksmbd_work *work)
5576 {
5577 struct smb2_query_info_req *req;
5578 struct smb2_query_info_rsp *rsp;
5579 int rc = 0;
5580
5581 WORK_BUFFERS(work, req, rsp);
5582
5583 ksmbd_debug(SMB, "GOT query info request\n");
5584
5585 switch (req->InfoType) {
5586 case SMB2_O_INFO_FILE:
5587 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5588 rc = smb2_get_info_file(work, req, rsp);
5589 break;
5590 case SMB2_O_INFO_FILESYSTEM:
5591 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5592 rc = smb2_get_info_filesystem(work, req, rsp);
5593 break;
5594 case SMB2_O_INFO_SECURITY:
5595 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5596 rc = smb2_get_info_sec(work, req, rsp);
5597 break;
5598 default:
5599 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5600 req->InfoType);
5601 rc = -EOPNOTSUPP;
5602 }
5603
5604 if (!rc) {
5605 rsp->StructureSize = cpu_to_le16(9);
5606 rsp->OutputBufferOffset = cpu_to_le16(72);
5607 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5608 offsetof(struct smb2_query_info_rsp, Buffer) +
5609 le32_to_cpu(rsp->OutputBufferLength));
5610 }
5611
5612 if (rc < 0) {
5613 if (rc == -EACCES)
5614 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5615 else if (rc == -ENOENT)
5616 rsp->hdr.Status = STATUS_FILE_CLOSED;
5617 else if (rc == -EIO)
5618 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5619 else if (rc == -ENOMEM)
5620 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5621 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5622 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5623 smb2_set_err_rsp(work);
5624
5625 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5626 rc);
5627 return rc;
5628 }
5629 return 0;
5630 }
5631
5632 /**
5633 * smb2_close_pipe() - handler for closing IPC pipe
5634 * @work: smb work containing close request buffer
5635 *
5636 * Return: 0
5637 */
smb2_close_pipe(struct ksmbd_work * work)5638 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5639 {
5640 u64 id;
5641 struct smb2_close_req *req;
5642 struct smb2_close_rsp *rsp;
5643
5644 WORK_BUFFERS(work, req, rsp);
5645
5646 id = req->VolatileFileId;
5647 ksmbd_session_rpc_close(work->sess, id);
5648
5649 rsp->StructureSize = cpu_to_le16(60);
5650 rsp->Flags = 0;
5651 rsp->Reserved = 0;
5652 rsp->CreationTime = 0;
5653 rsp->LastAccessTime = 0;
5654 rsp->LastWriteTime = 0;
5655 rsp->ChangeTime = 0;
5656 rsp->AllocationSize = 0;
5657 rsp->EndOfFile = 0;
5658 rsp->Attributes = 0;
5659
5660 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5661 sizeof(struct smb2_close_rsp));
5662 }
5663
5664 /**
5665 * smb2_close() - handler for smb2 close file command
5666 * @work: smb work containing close request buffer
5667 *
5668 * Return: 0
5669 */
smb2_close(struct ksmbd_work * work)5670 int smb2_close(struct ksmbd_work *work)
5671 {
5672 u64 volatile_id = KSMBD_NO_FID;
5673 u64 sess_id;
5674 struct smb2_close_req *req;
5675 struct smb2_close_rsp *rsp;
5676 struct ksmbd_conn *conn = work->conn;
5677 struct ksmbd_file *fp;
5678 u64 time;
5679 int err = 0;
5680
5681 WORK_BUFFERS(work, req, rsp);
5682
5683 if (test_share_config_flag(work->tcon->share_conf,
5684 KSMBD_SHARE_FLAG_PIPE)) {
5685 ksmbd_debug(SMB, "IPC pipe close request\n");
5686 return smb2_close_pipe(work);
5687 }
5688
5689 sess_id = le64_to_cpu(req->hdr.SessionId);
5690 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5691 sess_id = work->compound_sid;
5692
5693 work->compound_sid = 0;
5694 if (check_session_id(conn, sess_id)) {
5695 work->compound_sid = sess_id;
5696 } else {
5697 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5698 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5699 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5700 err = -EBADF;
5701 goto out;
5702 }
5703
5704 if (work->next_smb2_rcv_hdr_off &&
5705 !has_file_id(req->VolatileFileId)) {
5706 if (!has_file_id(work->compound_fid)) {
5707 /* file already closed, return FILE_CLOSED */
5708 ksmbd_debug(SMB, "file already closed\n");
5709 rsp->hdr.Status = STATUS_FILE_CLOSED;
5710 err = -EBADF;
5711 goto out;
5712 } else {
5713 ksmbd_debug(SMB,
5714 "Compound request set FID = %llu:%llu\n",
5715 work->compound_fid,
5716 work->compound_pfid);
5717 volatile_id = work->compound_fid;
5718
5719 /* file closed, stored id is not valid anymore */
5720 work->compound_fid = KSMBD_NO_FID;
5721 work->compound_pfid = KSMBD_NO_FID;
5722 }
5723 } else {
5724 volatile_id = req->VolatileFileId;
5725 }
5726 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5727
5728 rsp->StructureSize = cpu_to_le16(60);
5729 rsp->Reserved = 0;
5730
5731 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5732 struct kstat stat;
5733 int ret;
5734
5735 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5736 if (!fp) {
5737 err = -ENOENT;
5738 goto out;
5739 }
5740
5741 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5742 AT_STATX_SYNC_AS_STAT);
5743 if (ret) {
5744 ksmbd_fd_put(work, fp);
5745 goto out;
5746 }
5747
5748 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5749 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5750 cpu_to_le64(stat.blocks << 9);
5751 rsp->EndOfFile = cpu_to_le64(stat.size);
5752 rsp->Attributes = fp->f_ci->m_fattr;
5753 rsp->CreationTime = cpu_to_le64(fp->create_time);
5754 time = ksmbd_UnixTimeToNT(stat.atime);
5755 rsp->LastAccessTime = cpu_to_le64(time);
5756 time = ksmbd_UnixTimeToNT(stat.mtime);
5757 rsp->LastWriteTime = cpu_to_le64(time);
5758 time = ksmbd_UnixTimeToNT(stat.ctime);
5759 rsp->ChangeTime = cpu_to_le64(time);
5760 ksmbd_fd_put(work, fp);
5761 } else {
5762 rsp->Flags = 0;
5763 rsp->AllocationSize = 0;
5764 rsp->EndOfFile = 0;
5765 rsp->Attributes = 0;
5766 rsp->CreationTime = 0;
5767 rsp->LastAccessTime = 0;
5768 rsp->LastWriteTime = 0;
5769 rsp->ChangeTime = 0;
5770 }
5771
5772 err = ksmbd_close_fd(work, volatile_id);
5773 out:
5774 if (!err)
5775 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5776 sizeof(struct smb2_close_rsp));
5777
5778 if (err) {
5779 if (rsp->hdr.Status == 0)
5780 rsp->hdr.Status = STATUS_FILE_CLOSED;
5781 smb2_set_err_rsp(work);
5782 }
5783
5784 return err;
5785 }
5786
5787 /**
5788 * smb2_echo() - handler for smb2 echo(ping) command
5789 * @work: smb work containing echo request buffer
5790 *
5791 * Return: 0
5792 */
smb2_echo(struct ksmbd_work * work)5793 int smb2_echo(struct ksmbd_work *work)
5794 {
5795 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5796
5797 if (work->next_smb2_rcv_hdr_off)
5798 rsp = ksmbd_resp_buf_next(work);
5799
5800 rsp->StructureSize = cpu_to_le16(4);
5801 rsp->Reserved = 0;
5802 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5803 }
5804
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5805 static int smb2_rename(struct ksmbd_work *work,
5806 struct ksmbd_file *fp,
5807 struct smb2_file_rename_info *file_info,
5808 struct nls_table *local_nls)
5809 {
5810 struct ksmbd_share_config *share = fp->tcon->share_conf;
5811 char *new_name = NULL;
5812 int rc, flags = 0;
5813
5814 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5815 new_name = smb2_get_name(file_info->FileName,
5816 le32_to_cpu(file_info->FileNameLength),
5817 local_nls);
5818 if (IS_ERR(new_name))
5819 return PTR_ERR(new_name);
5820
5821 if (strchr(new_name, ':')) {
5822 int s_type;
5823 char *xattr_stream_name, *stream_name = NULL;
5824 size_t xattr_stream_size;
5825 int len;
5826
5827 rc = parse_stream_name(new_name, &stream_name, &s_type);
5828 if (rc < 0)
5829 goto out;
5830
5831 len = strlen(new_name);
5832 if (len > 0 && new_name[len - 1] != '/') {
5833 pr_err("not allow base filename in rename\n");
5834 rc = -ESHARE;
5835 goto out;
5836 }
5837
5838 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5839 &xattr_stream_name,
5840 &xattr_stream_size,
5841 s_type);
5842 if (rc)
5843 goto out;
5844
5845 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5846 &fp->filp->f_path,
5847 xattr_stream_name,
5848 NULL, 0, 0, true);
5849 if (rc < 0) {
5850 pr_err("failed to store stream name in xattr: %d\n",
5851 rc);
5852 rc = -EINVAL;
5853 goto out;
5854 }
5855
5856 goto out;
5857 }
5858
5859 ksmbd_debug(SMB, "new name %s\n", new_name);
5860 if (ksmbd_share_veto_filename(share, new_name)) {
5861 rc = -ENOENT;
5862 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5863 goto out;
5864 }
5865
5866 if (!file_info->ReplaceIfExists)
5867 flags = RENAME_NOREPLACE;
5868
5869 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5870 if (!rc)
5871 smb_break_all_levII_oplock(work, fp, 0);
5872 out:
5873 kfree(new_name);
5874 return rc;
5875 }
5876
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)5877 static int smb2_create_link(struct ksmbd_work *work,
5878 struct ksmbd_share_config *share,
5879 struct smb2_file_link_info *file_info,
5880 unsigned int buf_len, struct file *filp,
5881 struct nls_table *local_nls)
5882 {
5883 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5884 struct path path, parent_path;
5885 bool file_present = false;
5886 int rc;
5887
5888 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5889 le32_to_cpu(file_info->FileNameLength))
5890 return -EINVAL;
5891
5892 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5893 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5894 if (!pathname)
5895 return -ENOMEM;
5896
5897 link_name = smb2_get_name(file_info->FileName,
5898 le32_to_cpu(file_info->FileNameLength),
5899 local_nls);
5900 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5901 rc = -EINVAL;
5902 goto out;
5903 }
5904
5905 ksmbd_debug(SMB, "link name is %s\n", link_name);
5906 target_name = file_path(filp, pathname, PATH_MAX);
5907 if (IS_ERR(target_name)) {
5908 rc = -EINVAL;
5909 goto out;
5910 }
5911
5912 ksmbd_debug(SMB, "target name is %s\n", target_name);
5913 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5914 &parent_path, &path, 0);
5915 if (rc) {
5916 if (rc != -ENOENT)
5917 goto out;
5918 } else
5919 file_present = true;
5920
5921 if (file_info->ReplaceIfExists) {
5922 if (file_present) {
5923 rc = ksmbd_vfs_remove_file(work, &path);
5924 if (rc) {
5925 rc = -EINVAL;
5926 ksmbd_debug(SMB, "cannot delete %s\n",
5927 link_name);
5928 goto out;
5929 }
5930 }
5931 } else {
5932 if (file_present) {
5933 rc = -EEXIST;
5934 ksmbd_debug(SMB, "link already exists\n");
5935 goto out;
5936 }
5937 }
5938
5939 rc = ksmbd_vfs_link(work, target_name, link_name);
5940 if (rc)
5941 rc = -EINVAL;
5942 out:
5943 if (file_present)
5944 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5945
5946 if (!IS_ERR(link_name))
5947 kfree(link_name);
5948 kfree(pathname);
5949 return rc;
5950 }
5951
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)5952 static int set_file_basic_info(struct ksmbd_file *fp,
5953 struct smb2_file_basic_info *file_info,
5954 struct ksmbd_share_config *share)
5955 {
5956 struct iattr attrs;
5957 struct file *filp;
5958 struct inode *inode;
5959 struct mnt_idmap *idmap;
5960 int rc = 0;
5961
5962 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5963 return -EACCES;
5964
5965 attrs.ia_valid = 0;
5966 filp = fp->filp;
5967 inode = file_inode(filp);
5968 idmap = file_mnt_idmap(filp);
5969
5970 if (file_info->CreationTime)
5971 fp->create_time = le64_to_cpu(file_info->CreationTime);
5972
5973 if (file_info->LastAccessTime) {
5974 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5975 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5976 }
5977
5978 attrs.ia_valid |= ATTR_CTIME;
5979 if (file_info->ChangeTime)
5980 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5981 else
5982 attrs.ia_ctime = inode_get_ctime(inode);
5983
5984 if (file_info->LastWriteTime) {
5985 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5986 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5987 }
5988
5989 if (file_info->Attributes) {
5990 if (!S_ISDIR(inode->i_mode) &&
5991 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5992 pr_err("can't change a file to a directory\n");
5993 return -EINVAL;
5994 }
5995
5996 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5997 fp->f_ci->m_fattr = file_info->Attributes |
5998 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5999 }
6000
6001 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6002 (file_info->CreationTime || file_info->Attributes)) {
6003 struct xattr_dos_attrib da = {0};
6004
6005 da.version = 4;
6006 da.itime = fp->itime;
6007 da.create_time = fp->create_time;
6008 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6009 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6010 XATTR_DOSINFO_ITIME;
6011
6012 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6013 true);
6014 if (rc)
6015 ksmbd_debug(SMB,
6016 "failed to restore file attribute in EA\n");
6017 rc = 0;
6018 }
6019
6020 if (attrs.ia_valid) {
6021 struct dentry *dentry = filp->f_path.dentry;
6022 struct inode *inode = d_inode(dentry);
6023
6024 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6025 return -EACCES;
6026
6027 inode_lock(inode);
6028 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
6029 attrs.ia_valid &= ~ATTR_CTIME;
6030 rc = notify_change(idmap, dentry, &attrs, NULL);
6031 inode_unlock(inode);
6032 }
6033 return rc;
6034 }
6035
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)6036 static int set_file_allocation_info(struct ksmbd_work *work,
6037 struct ksmbd_file *fp,
6038 struct smb2_file_alloc_info *file_alloc_info)
6039 {
6040 /*
6041 * TODO : It's working fine only when store dos attributes
6042 * is not yes. need to implement a logic which works
6043 * properly with any smb.conf option
6044 */
6045
6046 loff_t alloc_blks;
6047 struct inode *inode;
6048 struct kstat stat;
6049 int rc;
6050
6051 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6052 return -EACCES;
6053
6054 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6055 AT_STATX_SYNC_AS_STAT);
6056 if (rc)
6057 return rc;
6058
6059 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6060 inode = file_inode(fp->filp);
6061
6062 if (alloc_blks > stat.blocks) {
6063 smb_break_all_levII_oplock(work, fp, 1);
6064 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6065 alloc_blks * 512);
6066 if (rc && rc != -EOPNOTSUPP) {
6067 pr_err("vfs_fallocate is failed : %d\n", rc);
6068 return rc;
6069 }
6070 } else if (alloc_blks < stat.blocks) {
6071 loff_t size;
6072
6073 /*
6074 * Allocation size could be smaller than original one
6075 * which means allocated blocks in file should be
6076 * deallocated. use truncate to cut out it, but inode
6077 * size is also updated with truncate offset.
6078 * inode size is retained by backup inode size.
6079 */
6080 size = i_size_read(inode);
6081 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6082 if (rc) {
6083 pr_err("truncate failed!, err %d\n", rc);
6084 return rc;
6085 }
6086 if (size < alloc_blks * 512)
6087 i_size_write(inode, size);
6088 }
6089 return 0;
6090 }
6091
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)6092 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6093 struct smb2_file_eof_info *file_eof_info)
6094 {
6095 loff_t newsize;
6096 struct inode *inode;
6097 int rc;
6098
6099 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6100 return -EACCES;
6101
6102 newsize = le64_to_cpu(file_eof_info->EndOfFile);
6103 inode = file_inode(fp->filp);
6104
6105 /*
6106 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6107 * on FAT32 shared device, truncate execution time is too long
6108 * and network error could cause from windows client. because
6109 * truncate of some filesystem like FAT32 fill zero data in
6110 * truncated range.
6111 */
6112 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6113 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6114 rc = ksmbd_vfs_truncate(work, fp, newsize);
6115 if (rc) {
6116 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6117 if (rc != -EAGAIN)
6118 rc = -EBADF;
6119 return rc;
6120 }
6121 }
6122 return 0;
6123 }
6124
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)6125 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6126 struct smb2_file_rename_info *rename_info,
6127 unsigned int buf_len)
6128 {
6129 if (!(fp->daccess & FILE_DELETE_LE)) {
6130 pr_err("no right to delete : 0x%x\n", fp->daccess);
6131 return -EACCES;
6132 }
6133
6134 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6135 le32_to_cpu(rename_info->FileNameLength))
6136 return -EINVAL;
6137
6138 if (!le32_to_cpu(rename_info->FileNameLength))
6139 return -EINVAL;
6140
6141 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6142 }
6143
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)6144 static int set_file_disposition_info(struct ksmbd_file *fp,
6145 struct smb2_file_disposition_info *file_info)
6146 {
6147 struct inode *inode;
6148
6149 if (!(fp->daccess & FILE_DELETE_LE)) {
6150 pr_err("no right to delete : 0x%x\n", fp->daccess);
6151 return -EACCES;
6152 }
6153
6154 inode = file_inode(fp->filp);
6155 if (file_info->DeletePending) {
6156 if (S_ISDIR(inode->i_mode) &&
6157 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6158 return -EBUSY;
6159 ksmbd_set_inode_pending_delete(fp);
6160 } else {
6161 ksmbd_clear_inode_pending_delete(fp);
6162 }
6163 return 0;
6164 }
6165
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)6166 static int set_file_position_info(struct ksmbd_file *fp,
6167 struct smb2_file_pos_info *file_info)
6168 {
6169 loff_t current_byte_offset;
6170 unsigned long sector_size;
6171 struct inode *inode;
6172
6173 inode = file_inode(fp->filp);
6174 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6175 sector_size = inode->i_sb->s_blocksize;
6176
6177 if (current_byte_offset < 0 ||
6178 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6179 current_byte_offset & (sector_size - 1))) {
6180 pr_err("CurrentByteOffset is not valid : %llu\n",
6181 current_byte_offset);
6182 return -EINVAL;
6183 }
6184
6185 fp->filp->f_pos = current_byte_offset;
6186 return 0;
6187 }
6188
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)6189 static int set_file_mode_info(struct ksmbd_file *fp,
6190 struct smb2_file_mode_info *file_info)
6191 {
6192 __le32 mode;
6193
6194 mode = file_info->Mode;
6195
6196 if ((mode & ~FILE_MODE_INFO_MASK)) {
6197 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6198 return -EINVAL;
6199 }
6200
6201 /*
6202 * TODO : need to implement consideration for
6203 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6204 */
6205 ksmbd_vfs_set_fadvise(fp->filp, mode);
6206 fp->coption = mode;
6207 return 0;
6208 }
6209
6210 /**
6211 * smb2_set_info_file() - handler for smb2 set info command
6212 * @work: smb work containing set info command buffer
6213 * @fp: ksmbd_file pointer
6214 * @req: request buffer pointer
6215 * @share: ksmbd_share_config pointer
6216 *
6217 * Return: 0 on success, otherwise error
6218 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6219 */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)6220 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6221 struct smb2_set_info_req *req,
6222 struct ksmbd_share_config *share)
6223 {
6224 unsigned int buf_len = le32_to_cpu(req->BufferLength);
6225 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6226
6227 switch (req->FileInfoClass) {
6228 case FILE_BASIC_INFORMATION:
6229 {
6230 if (buf_len < sizeof(struct smb2_file_basic_info))
6231 return -EINVAL;
6232
6233 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6234 }
6235 case FILE_ALLOCATION_INFORMATION:
6236 {
6237 if (buf_len < sizeof(struct smb2_file_alloc_info))
6238 return -EINVAL;
6239
6240 return set_file_allocation_info(work, fp,
6241 (struct smb2_file_alloc_info *)buffer);
6242 }
6243 case FILE_END_OF_FILE_INFORMATION:
6244 {
6245 if (buf_len < sizeof(struct smb2_file_eof_info))
6246 return -EINVAL;
6247
6248 return set_end_of_file_info(work, fp,
6249 (struct smb2_file_eof_info *)buffer);
6250 }
6251 case FILE_RENAME_INFORMATION:
6252 {
6253 if (buf_len < sizeof(struct smb2_file_rename_info))
6254 return -EINVAL;
6255
6256 return set_rename_info(work, fp,
6257 (struct smb2_file_rename_info *)buffer,
6258 buf_len);
6259 }
6260 case FILE_LINK_INFORMATION:
6261 {
6262 if (buf_len < sizeof(struct smb2_file_link_info))
6263 return -EINVAL;
6264
6265 return smb2_create_link(work, work->tcon->share_conf,
6266 (struct smb2_file_link_info *)buffer,
6267 buf_len, fp->filp,
6268 work->conn->local_nls);
6269 }
6270 case FILE_DISPOSITION_INFORMATION:
6271 {
6272 if (buf_len < sizeof(struct smb2_file_disposition_info))
6273 return -EINVAL;
6274
6275 return set_file_disposition_info(fp,
6276 (struct smb2_file_disposition_info *)buffer);
6277 }
6278 case FILE_FULL_EA_INFORMATION:
6279 {
6280 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6281 pr_err("Not permitted to write ext attr: 0x%x\n",
6282 fp->daccess);
6283 return -EACCES;
6284 }
6285
6286 if (buf_len < sizeof(struct smb2_ea_info))
6287 return -EINVAL;
6288
6289 return smb2_set_ea((struct smb2_ea_info *)buffer,
6290 buf_len, &fp->filp->f_path, true);
6291 }
6292 case FILE_POSITION_INFORMATION:
6293 {
6294 if (buf_len < sizeof(struct smb2_file_pos_info))
6295 return -EINVAL;
6296
6297 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6298 }
6299 case FILE_MODE_INFORMATION:
6300 {
6301 if (buf_len < sizeof(struct smb2_file_mode_info))
6302 return -EINVAL;
6303
6304 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6305 }
6306 }
6307
6308 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6309 return -EOPNOTSUPP;
6310 }
6311
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6312 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6313 char *buffer, int buf_len)
6314 {
6315 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6316
6317 fp->saccess |= FILE_SHARE_DELETE_LE;
6318
6319 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6320 buf_len, false, true);
6321 }
6322
6323 /**
6324 * smb2_set_info() - handler for smb2 set info command handler
6325 * @work: smb work containing set info request buffer
6326 *
6327 * Return: 0 on success, otherwise error
6328 */
smb2_set_info(struct ksmbd_work * work)6329 int smb2_set_info(struct ksmbd_work *work)
6330 {
6331 struct smb2_set_info_req *req;
6332 struct smb2_set_info_rsp *rsp;
6333 struct ksmbd_file *fp = NULL;
6334 int rc = 0;
6335 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6336
6337 ksmbd_debug(SMB, "Received set info request\n");
6338
6339 if (work->next_smb2_rcv_hdr_off) {
6340 req = ksmbd_req_buf_next(work);
6341 rsp = ksmbd_resp_buf_next(work);
6342 if (!has_file_id(req->VolatileFileId)) {
6343 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6344 work->compound_fid);
6345 id = work->compound_fid;
6346 pid = work->compound_pfid;
6347 }
6348 } else {
6349 req = smb2_get_msg(work->request_buf);
6350 rsp = smb2_get_msg(work->response_buf);
6351 }
6352
6353 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6354 ksmbd_debug(SMB, "User does not have write permission\n");
6355 pr_err("User does not have write permission\n");
6356 rc = -EACCES;
6357 goto err_out;
6358 }
6359
6360 if (!has_file_id(id)) {
6361 id = req->VolatileFileId;
6362 pid = req->PersistentFileId;
6363 }
6364
6365 fp = ksmbd_lookup_fd_slow(work, id, pid);
6366 if (!fp) {
6367 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6368 rc = -ENOENT;
6369 goto err_out;
6370 }
6371
6372 switch (req->InfoType) {
6373 case SMB2_O_INFO_FILE:
6374 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6375 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6376 break;
6377 case SMB2_O_INFO_SECURITY:
6378 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6379 if (ksmbd_override_fsids(work)) {
6380 rc = -ENOMEM;
6381 goto err_out;
6382 }
6383 rc = smb2_set_info_sec(fp,
6384 le32_to_cpu(req->AdditionalInformation),
6385 (char *)req + le16_to_cpu(req->BufferOffset),
6386 le32_to_cpu(req->BufferLength));
6387 ksmbd_revert_fsids(work);
6388 break;
6389 default:
6390 rc = -EOPNOTSUPP;
6391 }
6392
6393 if (rc < 0)
6394 goto err_out;
6395
6396 rsp->StructureSize = cpu_to_le16(2);
6397 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6398 sizeof(struct smb2_set_info_rsp));
6399 if (rc)
6400 goto err_out;
6401 ksmbd_fd_put(work, fp);
6402 return 0;
6403
6404 err_out:
6405 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6406 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6407 else if (rc == -EINVAL)
6408 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6409 else if (rc == -ESHARE)
6410 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6411 else if (rc == -ENOENT)
6412 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6413 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6414 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6415 else if (rc == -EAGAIN)
6416 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6417 else if (rc == -EBADF || rc == -ESTALE)
6418 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6419 else if (rc == -EEXIST)
6420 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6421 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6422 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6423 smb2_set_err_rsp(work);
6424 ksmbd_fd_put(work, fp);
6425 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6426 return rc;
6427 }
6428
6429 /**
6430 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6431 * @work: smb work containing read IPC pipe command buffer
6432 *
6433 * Return: 0 on success, otherwise error
6434 */
smb2_read_pipe(struct ksmbd_work * work)6435 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6436 {
6437 int nbytes = 0, err;
6438 u64 id;
6439 struct ksmbd_rpc_command *rpc_resp;
6440 struct smb2_read_req *req;
6441 struct smb2_read_rsp *rsp;
6442
6443 WORK_BUFFERS(work, req, rsp);
6444
6445 id = req->VolatileFileId;
6446
6447 rpc_resp = ksmbd_rpc_read(work->sess, id);
6448 if (rpc_resp) {
6449 void *aux_payload_buf;
6450
6451 if (rpc_resp->flags != KSMBD_RPC_OK) {
6452 err = -EINVAL;
6453 goto out;
6454 }
6455
6456 aux_payload_buf =
6457 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6458 if (!aux_payload_buf) {
6459 err = -ENOMEM;
6460 goto out;
6461 }
6462
6463 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6464
6465 nbytes = rpc_resp->payload_sz;
6466 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6467 offsetof(struct smb2_read_rsp, Buffer),
6468 aux_payload_buf, nbytes);
6469 if (err) {
6470 kvfree(aux_payload_buf);
6471 goto out;
6472 }
6473 kvfree(rpc_resp);
6474 } else {
6475 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6476 offsetof(struct smb2_read_rsp, Buffer));
6477 if (err)
6478 goto out;
6479 }
6480
6481 rsp->StructureSize = cpu_to_le16(17);
6482 rsp->DataOffset = 80;
6483 rsp->Reserved = 0;
6484 rsp->DataLength = cpu_to_le32(nbytes);
6485 rsp->DataRemaining = 0;
6486 rsp->Flags = 0;
6487 return 0;
6488
6489 out:
6490 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6491 smb2_set_err_rsp(work);
6492 kvfree(rpc_resp);
6493 return err;
6494 }
6495
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6496 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6497 struct smb2_buffer_desc_v1 *desc,
6498 __le32 Channel,
6499 __le16 ChannelInfoLength)
6500 {
6501 unsigned int i, ch_count;
6502
6503 if (work->conn->dialect == SMB30_PROT_ID &&
6504 Channel != SMB2_CHANNEL_RDMA_V1)
6505 return -EINVAL;
6506
6507 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6508 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6509 for (i = 0; i < ch_count; i++) {
6510 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6511 i,
6512 le32_to_cpu(desc[i].token),
6513 le32_to_cpu(desc[i].length));
6514 }
6515 }
6516 if (!ch_count)
6517 return -EINVAL;
6518
6519 work->need_invalidate_rkey =
6520 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6521 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6522 work->remote_key = le32_to_cpu(desc->token);
6523 return 0;
6524 }
6525
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6526 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6527 struct smb2_read_req *req, void *data_buf,
6528 size_t length)
6529 {
6530 int err;
6531
6532 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6533 (struct smb2_buffer_desc_v1 *)
6534 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6535 le16_to_cpu(req->ReadChannelInfoLength));
6536 if (err)
6537 return err;
6538
6539 return length;
6540 }
6541
6542 /**
6543 * smb2_read() - handler for smb2 read from file
6544 * @work: smb work containing read command buffer
6545 *
6546 * Return: 0 on success, otherwise error
6547 */
smb2_read(struct ksmbd_work * work)6548 int smb2_read(struct ksmbd_work *work)
6549 {
6550 struct ksmbd_conn *conn = work->conn;
6551 struct smb2_read_req *req;
6552 struct smb2_read_rsp *rsp;
6553 struct ksmbd_file *fp = NULL;
6554 loff_t offset;
6555 size_t length, mincount;
6556 ssize_t nbytes = 0, remain_bytes = 0;
6557 int err = 0;
6558 bool is_rdma_channel = false;
6559 unsigned int max_read_size = conn->vals->max_read_size;
6560 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6561 void *aux_payload_buf;
6562
6563 if (test_share_config_flag(work->tcon->share_conf,
6564 KSMBD_SHARE_FLAG_PIPE)) {
6565 ksmbd_debug(SMB, "IPC pipe read request\n");
6566 return smb2_read_pipe(work);
6567 }
6568
6569 if (work->next_smb2_rcv_hdr_off) {
6570 req = ksmbd_req_buf_next(work);
6571 rsp = ksmbd_resp_buf_next(work);
6572 if (!has_file_id(req->VolatileFileId)) {
6573 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6574 work->compound_fid);
6575 id = work->compound_fid;
6576 pid = work->compound_pfid;
6577 }
6578 } else {
6579 req = smb2_get_msg(work->request_buf);
6580 rsp = smb2_get_msg(work->response_buf);
6581 }
6582
6583 if (!has_file_id(id)) {
6584 id = req->VolatileFileId;
6585 pid = req->PersistentFileId;
6586 }
6587
6588 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6589 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6590 is_rdma_channel = true;
6591 max_read_size = get_smbd_max_read_write_size();
6592 }
6593
6594 if (is_rdma_channel == true) {
6595 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6596
6597 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6598 err = -EINVAL;
6599 goto out;
6600 }
6601 err = smb2_set_remote_key_for_rdma(work,
6602 (struct smb2_buffer_desc_v1 *)
6603 ((char *)req + ch_offset),
6604 req->Channel,
6605 req->ReadChannelInfoLength);
6606 if (err)
6607 goto out;
6608 }
6609
6610 fp = ksmbd_lookup_fd_slow(work, id, pid);
6611 if (!fp) {
6612 err = -ENOENT;
6613 goto out;
6614 }
6615
6616 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6617 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6618 err = -EACCES;
6619 goto out;
6620 }
6621
6622 offset = le64_to_cpu(req->Offset);
6623 length = le32_to_cpu(req->Length);
6624 mincount = le32_to_cpu(req->MinimumCount);
6625
6626 if (length > max_read_size) {
6627 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6628 max_read_size);
6629 err = -EINVAL;
6630 goto out;
6631 }
6632
6633 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6634 fp->filp, offset, length);
6635
6636 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6637 if (!aux_payload_buf) {
6638 err = -ENOMEM;
6639 goto out;
6640 }
6641
6642 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6643 if (nbytes < 0) {
6644 err = nbytes;
6645 goto out;
6646 }
6647
6648 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6649 kvfree(aux_payload_buf);
6650 rsp->hdr.Status = STATUS_END_OF_FILE;
6651 smb2_set_err_rsp(work);
6652 ksmbd_fd_put(work, fp);
6653 return 0;
6654 }
6655
6656 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6657 nbytes, offset, mincount);
6658
6659 if (is_rdma_channel == true) {
6660 /* write data to the client using rdma channel */
6661 remain_bytes = smb2_read_rdma_channel(work, req,
6662 aux_payload_buf,
6663 nbytes);
6664 kvfree(aux_payload_buf);
6665 aux_payload_buf = NULL;
6666 nbytes = 0;
6667 if (remain_bytes < 0) {
6668 err = (int)remain_bytes;
6669 goto out;
6670 }
6671 }
6672
6673 rsp->StructureSize = cpu_to_le16(17);
6674 rsp->DataOffset = 80;
6675 rsp->Reserved = 0;
6676 rsp->DataLength = cpu_to_le32(nbytes);
6677 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6678 rsp->Flags = 0;
6679 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6680 offsetof(struct smb2_read_rsp, Buffer),
6681 aux_payload_buf, nbytes);
6682 if (err) {
6683 kvfree(aux_payload_buf);
6684 goto out;
6685 }
6686 ksmbd_fd_put(work, fp);
6687 return 0;
6688
6689 out:
6690 if (err) {
6691 if (err == -EISDIR)
6692 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6693 else if (err == -EAGAIN)
6694 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6695 else if (err == -ENOENT)
6696 rsp->hdr.Status = STATUS_FILE_CLOSED;
6697 else if (err == -EACCES)
6698 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6699 else if (err == -ESHARE)
6700 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6701 else if (err == -EINVAL)
6702 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6703 else
6704 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6705
6706 smb2_set_err_rsp(work);
6707 }
6708 ksmbd_fd_put(work, fp);
6709 return err;
6710 }
6711
6712 /**
6713 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6714 * @work: smb work containing write IPC pipe command buffer
6715 *
6716 * Return: 0 on success, otherwise error
6717 */
smb2_write_pipe(struct ksmbd_work * work)6718 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6719 {
6720 struct smb2_write_req *req;
6721 struct smb2_write_rsp *rsp;
6722 struct ksmbd_rpc_command *rpc_resp;
6723 u64 id = 0;
6724 int err = 0, ret = 0;
6725 char *data_buf;
6726 size_t length;
6727
6728 WORK_BUFFERS(work, req, rsp);
6729
6730 length = le32_to_cpu(req->Length);
6731 id = req->VolatileFileId;
6732
6733 if ((u64)le16_to_cpu(req->DataOffset) + length >
6734 get_rfc1002_len(work->request_buf)) {
6735 pr_err("invalid write data offset %u, smb_len %u\n",
6736 le16_to_cpu(req->DataOffset),
6737 get_rfc1002_len(work->request_buf));
6738 err = -EINVAL;
6739 goto out;
6740 }
6741
6742 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6743 le16_to_cpu(req->DataOffset));
6744
6745 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6746 if (rpc_resp) {
6747 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6748 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6749 kvfree(rpc_resp);
6750 smb2_set_err_rsp(work);
6751 return -EOPNOTSUPP;
6752 }
6753 if (rpc_resp->flags != KSMBD_RPC_OK) {
6754 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6755 smb2_set_err_rsp(work);
6756 kvfree(rpc_resp);
6757 return ret;
6758 }
6759 kvfree(rpc_resp);
6760 }
6761
6762 rsp->StructureSize = cpu_to_le16(17);
6763 rsp->DataOffset = 0;
6764 rsp->Reserved = 0;
6765 rsp->DataLength = cpu_to_le32(length);
6766 rsp->DataRemaining = 0;
6767 rsp->Reserved2 = 0;
6768 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6769 offsetof(struct smb2_write_rsp, Buffer));
6770 out:
6771 if (err) {
6772 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6773 smb2_set_err_rsp(work);
6774 }
6775
6776 return err;
6777 }
6778
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)6779 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6780 struct smb2_write_req *req,
6781 struct ksmbd_file *fp,
6782 loff_t offset, size_t length, bool sync)
6783 {
6784 char *data_buf;
6785 int ret;
6786 ssize_t nbytes;
6787
6788 data_buf = kvzalloc(length, GFP_KERNEL);
6789 if (!data_buf)
6790 return -ENOMEM;
6791
6792 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6793 (struct smb2_buffer_desc_v1 *)
6794 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6795 le16_to_cpu(req->WriteChannelInfoLength));
6796 if (ret < 0) {
6797 kvfree(data_buf);
6798 return ret;
6799 }
6800
6801 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6802 kvfree(data_buf);
6803 if (ret < 0)
6804 return ret;
6805
6806 return nbytes;
6807 }
6808
6809 /**
6810 * smb2_write() - handler for smb2 write from file
6811 * @work: smb work containing write command buffer
6812 *
6813 * Return: 0 on success, otherwise error
6814 */
smb2_write(struct ksmbd_work * work)6815 int smb2_write(struct ksmbd_work *work)
6816 {
6817 struct smb2_write_req *req;
6818 struct smb2_write_rsp *rsp;
6819 struct ksmbd_file *fp = NULL;
6820 loff_t offset;
6821 size_t length;
6822 ssize_t nbytes;
6823 char *data_buf;
6824 bool writethrough = false, is_rdma_channel = false;
6825 int err = 0;
6826 unsigned int max_write_size = work->conn->vals->max_write_size;
6827
6828 WORK_BUFFERS(work, req, rsp);
6829
6830 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6831 ksmbd_debug(SMB, "IPC pipe write request\n");
6832 return smb2_write_pipe(work);
6833 }
6834
6835 offset = le64_to_cpu(req->Offset);
6836 length = le32_to_cpu(req->Length);
6837
6838 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6839 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6840 is_rdma_channel = true;
6841 max_write_size = get_smbd_max_read_write_size();
6842 length = le32_to_cpu(req->RemainingBytes);
6843 }
6844
6845 if (is_rdma_channel == true) {
6846 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6847
6848 if (req->Length != 0 || req->DataOffset != 0 ||
6849 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6850 err = -EINVAL;
6851 goto out;
6852 }
6853 err = smb2_set_remote_key_for_rdma(work,
6854 (struct smb2_buffer_desc_v1 *)
6855 ((char *)req + ch_offset),
6856 req->Channel,
6857 req->WriteChannelInfoLength);
6858 if (err)
6859 goto out;
6860 }
6861
6862 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6863 ksmbd_debug(SMB, "User does not have write permission\n");
6864 err = -EACCES;
6865 goto out;
6866 }
6867
6868 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6869 if (!fp) {
6870 err = -ENOENT;
6871 goto out;
6872 }
6873
6874 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6875 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6876 err = -EACCES;
6877 goto out;
6878 }
6879
6880 if (length > max_write_size) {
6881 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6882 max_write_size);
6883 err = -EINVAL;
6884 goto out;
6885 }
6886
6887 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6888 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6889 writethrough = true;
6890
6891 if (is_rdma_channel == false) {
6892 if (le16_to_cpu(req->DataOffset) <
6893 offsetof(struct smb2_write_req, Buffer)) {
6894 err = -EINVAL;
6895 goto out;
6896 }
6897
6898 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6899 le16_to_cpu(req->DataOffset));
6900
6901 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6902 fp->filp, offset, length);
6903 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6904 writethrough, &nbytes);
6905 if (err < 0)
6906 goto out;
6907 } else {
6908 /* read data from the client using rdma channel, and
6909 * write the data.
6910 */
6911 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6912 writethrough);
6913 if (nbytes < 0) {
6914 err = (int)nbytes;
6915 goto out;
6916 }
6917 }
6918
6919 rsp->StructureSize = cpu_to_le16(17);
6920 rsp->DataOffset = 0;
6921 rsp->Reserved = 0;
6922 rsp->DataLength = cpu_to_le32(nbytes);
6923 rsp->DataRemaining = 0;
6924 rsp->Reserved2 = 0;
6925 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6926 if (err)
6927 goto out;
6928 ksmbd_fd_put(work, fp);
6929 return 0;
6930
6931 out:
6932 if (err == -EAGAIN)
6933 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6934 else if (err == -ENOSPC || err == -EFBIG)
6935 rsp->hdr.Status = STATUS_DISK_FULL;
6936 else if (err == -ENOENT)
6937 rsp->hdr.Status = STATUS_FILE_CLOSED;
6938 else if (err == -EACCES)
6939 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6940 else if (err == -ESHARE)
6941 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6942 else if (err == -EINVAL)
6943 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6944 else
6945 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6946
6947 smb2_set_err_rsp(work);
6948 ksmbd_fd_put(work, fp);
6949 return err;
6950 }
6951
6952 /**
6953 * smb2_flush() - handler for smb2 flush file - fsync
6954 * @work: smb work containing flush command buffer
6955 *
6956 * Return: 0 on success, otherwise error
6957 */
smb2_flush(struct ksmbd_work * work)6958 int smb2_flush(struct ksmbd_work *work)
6959 {
6960 struct smb2_flush_req *req;
6961 struct smb2_flush_rsp *rsp;
6962 int err;
6963
6964 WORK_BUFFERS(work, req, rsp);
6965
6966 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6967
6968 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6969 if (err)
6970 goto out;
6971
6972 rsp->StructureSize = cpu_to_le16(4);
6973 rsp->Reserved = 0;
6974 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6975
6976 out:
6977 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6978 smb2_set_err_rsp(work);
6979 return err;
6980 }
6981
6982 /**
6983 * smb2_cancel() - handler for smb2 cancel command
6984 * @work: smb work containing cancel command buffer
6985 *
6986 * Return: 0 on success, otherwise error
6987 */
smb2_cancel(struct ksmbd_work * work)6988 int smb2_cancel(struct ksmbd_work *work)
6989 {
6990 struct ksmbd_conn *conn = work->conn;
6991 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6992 struct smb2_hdr *chdr;
6993 struct ksmbd_work *iter;
6994 struct list_head *command_list;
6995
6996 if (work->next_smb2_rcv_hdr_off)
6997 hdr = ksmbd_resp_buf_next(work);
6998
6999 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7000 hdr->MessageId, hdr->Flags);
7001
7002 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7003 command_list = &conn->async_requests;
7004
7005 spin_lock(&conn->request_lock);
7006 list_for_each_entry(iter, command_list,
7007 async_request_entry) {
7008 chdr = smb2_get_msg(iter->request_buf);
7009
7010 if (iter->async_id !=
7011 le64_to_cpu(hdr->Id.AsyncId))
7012 continue;
7013
7014 ksmbd_debug(SMB,
7015 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7016 le64_to_cpu(hdr->Id.AsyncId),
7017 le16_to_cpu(chdr->Command));
7018 iter->state = KSMBD_WORK_CANCELLED;
7019 if (iter->cancel_fn)
7020 iter->cancel_fn(iter->cancel_argv);
7021 break;
7022 }
7023 spin_unlock(&conn->request_lock);
7024 } else {
7025 command_list = &conn->requests;
7026
7027 spin_lock(&conn->request_lock);
7028 list_for_each_entry(iter, command_list, request_entry) {
7029 chdr = smb2_get_msg(iter->request_buf);
7030
7031 if (chdr->MessageId != hdr->MessageId ||
7032 iter == work)
7033 continue;
7034
7035 ksmbd_debug(SMB,
7036 "smb2 with mid %llu cancelled command = 0x%x\n",
7037 le64_to_cpu(hdr->MessageId),
7038 le16_to_cpu(chdr->Command));
7039 iter->state = KSMBD_WORK_CANCELLED;
7040 break;
7041 }
7042 spin_unlock(&conn->request_lock);
7043 }
7044
7045 /* For SMB2_CANCEL command itself send no response*/
7046 work->send_no_response = 1;
7047 return 0;
7048 }
7049
smb_flock_init(struct file * f)7050 struct file_lock *smb_flock_init(struct file *f)
7051 {
7052 struct file_lock *fl;
7053
7054 fl = locks_alloc_lock();
7055 if (!fl)
7056 goto out;
7057
7058 locks_init_lock(fl);
7059
7060 fl->fl_owner = f;
7061 fl->fl_pid = current->tgid;
7062 fl->fl_file = f;
7063 fl->fl_flags = FL_POSIX;
7064 fl->fl_ops = NULL;
7065 fl->fl_lmops = NULL;
7066
7067 out:
7068 return fl;
7069 }
7070
smb2_set_flock_flags(struct file_lock * flock,int flags)7071 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7072 {
7073 int cmd = -EINVAL;
7074
7075 /* Checking for wrong flag combination during lock request*/
7076 switch (flags) {
7077 case SMB2_LOCKFLAG_SHARED:
7078 ksmbd_debug(SMB, "received shared request\n");
7079 cmd = F_SETLKW;
7080 flock->fl_type = F_RDLCK;
7081 flock->fl_flags |= FL_SLEEP;
7082 break;
7083 case SMB2_LOCKFLAG_EXCLUSIVE:
7084 ksmbd_debug(SMB, "received exclusive request\n");
7085 cmd = F_SETLKW;
7086 flock->fl_type = F_WRLCK;
7087 flock->fl_flags |= FL_SLEEP;
7088 break;
7089 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7090 ksmbd_debug(SMB,
7091 "received shared & fail immediately request\n");
7092 cmd = F_SETLK;
7093 flock->fl_type = F_RDLCK;
7094 break;
7095 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7096 ksmbd_debug(SMB,
7097 "received exclusive & fail immediately request\n");
7098 cmd = F_SETLK;
7099 flock->fl_type = F_WRLCK;
7100 break;
7101 case SMB2_LOCKFLAG_UNLOCK:
7102 ksmbd_debug(SMB, "received unlock request\n");
7103 flock->fl_type = F_UNLCK;
7104 cmd = F_SETLK;
7105 break;
7106 }
7107
7108 return cmd;
7109 }
7110
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)7111 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7112 unsigned int cmd, int flags,
7113 struct list_head *lock_list)
7114 {
7115 struct ksmbd_lock *lock;
7116
7117 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
7118 if (!lock)
7119 return NULL;
7120
7121 lock->cmd = cmd;
7122 lock->fl = flock;
7123 lock->start = flock->fl_start;
7124 lock->end = flock->fl_end;
7125 lock->flags = flags;
7126 if (lock->start == lock->end)
7127 lock->zero_len = 1;
7128 INIT_LIST_HEAD(&lock->clist);
7129 INIT_LIST_HEAD(&lock->flist);
7130 INIT_LIST_HEAD(&lock->llist);
7131 list_add_tail(&lock->llist, lock_list);
7132
7133 return lock;
7134 }
7135
smb2_remove_blocked_lock(void ** argv)7136 static void smb2_remove_blocked_lock(void **argv)
7137 {
7138 struct file_lock *flock = (struct file_lock *)argv[0];
7139
7140 ksmbd_vfs_posix_lock_unblock(flock);
7141 wake_up(&flock->fl_wait);
7142 }
7143
lock_defer_pending(struct file_lock * fl)7144 static inline bool lock_defer_pending(struct file_lock *fl)
7145 {
7146 /* check pending lock waiters */
7147 return waitqueue_active(&fl->fl_wait);
7148 }
7149
7150 /**
7151 * smb2_lock() - handler for smb2 file lock command
7152 * @work: smb work containing lock command buffer
7153 *
7154 * Return: 0 on success, otherwise error
7155 */
smb2_lock(struct ksmbd_work * work)7156 int smb2_lock(struct ksmbd_work *work)
7157 {
7158 struct smb2_lock_req *req;
7159 struct smb2_lock_rsp *rsp;
7160 struct smb2_lock_element *lock_ele;
7161 struct ksmbd_file *fp = NULL;
7162 struct file_lock *flock = NULL;
7163 struct file *filp = NULL;
7164 int lock_count;
7165 int flags = 0;
7166 int cmd = 0;
7167 int err = -EIO, i, rc = 0;
7168 u64 lock_start, lock_length;
7169 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7170 struct ksmbd_conn *conn;
7171 int nolock = 0;
7172 LIST_HEAD(lock_list);
7173 LIST_HEAD(rollback_list);
7174 int prior_lock = 0;
7175
7176 WORK_BUFFERS(work, req, rsp);
7177
7178 ksmbd_debug(SMB, "Received lock request\n");
7179 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7180 if (!fp) {
7181 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7182 err = -ENOENT;
7183 goto out2;
7184 }
7185
7186 filp = fp->filp;
7187 lock_count = le16_to_cpu(req->LockCount);
7188 lock_ele = req->locks;
7189
7190 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7191 if (!lock_count) {
7192 err = -EINVAL;
7193 goto out2;
7194 }
7195
7196 for (i = 0; i < lock_count; i++) {
7197 flags = le32_to_cpu(lock_ele[i].Flags);
7198
7199 flock = smb_flock_init(filp);
7200 if (!flock)
7201 goto out;
7202
7203 cmd = smb2_set_flock_flags(flock, flags);
7204
7205 lock_start = le64_to_cpu(lock_ele[i].Offset);
7206 lock_length = le64_to_cpu(lock_ele[i].Length);
7207 if (lock_start > U64_MAX - lock_length) {
7208 pr_err("Invalid lock range requested\n");
7209 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7210 locks_free_lock(flock);
7211 goto out;
7212 }
7213
7214 if (lock_start > OFFSET_MAX)
7215 flock->fl_start = OFFSET_MAX;
7216 else
7217 flock->fl_start = lock_start;
7218
7219 lock_length = le64_to_cpu(lock_ele[i].Length);
7220 if (lock_length > OFFSET_MAX - flock->fl_start)
7221 lock_length = OFFSET_MAX - flock->fl_start;
7222
7223 flock->fl_end = flock->fl_start + lock_length;
7224
7225 if (flock->fl_end < flock->fl_start) {
7226 ksmbd_debug(SMB,
7227 "the end offset(%llx) is smaller than the start offset(%llx)\n",
7228 flock->fl_end, flock->fl_start);
7229 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7230 locks_free_lock(flock);
7231 goto out;
7232 }
7233
7234 /* Check conflict locks in one request */
7235 list_for_each_entry(cmp_lock, &lock_list, llist) {
7236 if (cmp_lock->fl->fl_start <= flock->fl_start &&
7237 cmp_lock->fl->fl_end >= flock->fl_end) {
7238 if (cmp_lock->fl->fl_type != F_UNLCK &&
7239 flock->fl_type != F_UNLCK) {
7240 pr_err("conflict two locks in one request\n");
7241 err = -EINVAL;
7242 locks_free_lock(flock);
7243 goto out;
7244 }
7245 }
7246 }
7247
7248 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7249 if (!smb_lock) {
7250 err = -EINVAL;
7251 locks_free_lock(flock);
7252 goto out;
7253 }
7254 }
7255
7256 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7257 if (smb_lock->cmd < 0) {
7258 err = -EINVAL;
7259 goto out;
7260 }
7261
7262 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7263 err = -EINVAL;
7264 goto out;
7265 }
7266
7267 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7268 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7269 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7270 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7271 err = -EINVAL;
7272 goto out;
7273 }
7274
7275 prior_lock = smb_lock->flags;
7276
7277 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7278 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7279 goto no_check_cl;
7280
7281 nolock = 1;
7282 /* check locks in connection list */
7283 down_read(&conn_list_lock);
7284 list_for_each_entry(conn, &conn_list, conns_list) {
7285 spin_lock(&conn->llist_lock);
7286 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7287 if (file_inode(cmp_lock->fl->fl_file) !=
7288 file_inode(smb_lock->fl->fl_file))
7289 continue;
7290
7291 if (smb_lock->fl->fl_type == F_UNLCK) {
7292 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
7293 cmp_lock->start == smb_lock->start &&
7294 cmp_lock->end == smb_lock->end &&
7295 !lock_defer_pending(cmp_lock->fl)) {
7296 nolock = 0;
7297 list_del(&cmp_lock->flist);
7298 list_del(&cmp_lock->clist);
7299 spin_unlock(&conn->llist_lock);
7300 up_read(&conn_list_lock);
7301
7302 locks_free_lock(cmp_lock->fl);
7303 kfree(cmp_lock);
7304 goto out_check_cl;
7305 }
7306 continue;
7307 }
7308
7309 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7310 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7311 continue;
7312 } else {
7313 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7314 continue;
7315 }
7316
7317 /* check zero byte lock range */
7318 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7319 cmp_lock->start > smb_lock->start &&
7320 cmp_lock->start < smb_lock->end) {
7321 spin_unlock(&conn->llist_lock);
7322 up_read(&conn_list_lock);
7323 pr_err("previous lock conflict with zero byte lock range\n");
7324 goto out;
7325 }
7326
7327 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7328 smb_lock->start > cmp_lock->start &&
7329 smb_lock->start < cmp_lock->end) {
7330 spin_unlock(&conn->llist_lock);
7331 up_read(&conn_list_lock);
7332 pr_err("current lock conflict with zero byte lock range\n");
7333 goto out;
7334 }
7335
7336 if (((cmp_lock->start <= smb_lock->start &&
7337 cmp_lock->end > smb_lock->start) ||
7338 (cmp_lock->start < smb_lock->end &&
7339 cmp_lock->end >= smb_lock->end)) &&
7340 !cmp_lock->zero_len && !smb_lock->zero_len) {
7341 spin_unlock(&conn->llist_lock);
7342 up_read(&conn_list_lock);
7343 pr_err("Not allow lock operation on exclusive lock range\n");
7344 goto out;
7345 }
7346 }
7347 spin_unlock(&conn->llist_lock);
7348 }
7349 up_read(&conn_list_lock);
7350 out_check_cl:
7351 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7352 pr_err("Try to unlock nolocked range\n");
7353 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7354 goto out;
7355 }
7356
7357 no_check_cl:
7358 if (smb_lock->zero_len) {
7359 err = 0;
7360 goto skip;
7361 }
7362
7363 flock = smb_lock->fl;
7364 list_del(&smb_lock->llist);
7365 retry:
7366 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7367 skip:
7368 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7369 if (!rc) {
7370 ksmbd_debug(SMB, "File unlocked\n");
7371 } else if (rc == -ENOENT) {
7372 rsp->hdr.Status = STATUS_NOT_LOCKED;
7373 goto out;
7374 }
7375 locks_free_lock(flock);
7376 kfree(smb_lock);
7377 } else {
7378 if (rc == FILE_LOCK_DEFERRED) {
7379 void **argv;
7380
7381 ksmbd_debug(SMB,
7382 "would have to wait for getting lock\n");
7383 list_add(&smb_lock->llist, &rollback_list);
7384
7385 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7386 if (!argv) {
7387 err = -ENOMEM;
7388 goto out;
7389 }
7390 argv[0] = flock;
7391
7392 rc = setup_async_work(work,
7393 smb2_remove_blocked_lock,
7394 argv);
7395 if (rc) {
7396 kfree(argv);
7397 err = -ENOMEM;
7398 goto out;
7399 }
7400 spin_lock(&fp->f_lock);
7401 list_add(&work->fp_entry, &fp->blocked_works);
7402 spin_unlock(&fp->f_lock);
7403
7404 smb2_send_interim_resp(work, STATUS_PENDING);
7405
7406 ksmbd_vfs_posix_lock_wait(flock);
7407
7408 spin_lock(&fp->f_lock);
7409 list_del(&work->fp_entry);
7410 spin_unlock(&fp->f_lock);
7411
7412 if (work->state != KSMBD_WORK_ACTIVE) {
7413 list_del(&smb_lock->llist);
7414 locks_free_lock(flock);
7415
7416 if (work->state == KSMBD_WORK_CANCELLED) {
7417 rsp->hdr.Status =
7418 STATUS_CANCELLED;
7419 kfree(smb_lock);
7420 smb2_send_interim_resp(work,
7421 STATUS_CANCELLED);
7422 work->send_no_response = 1;
7423 goto out;
7424 }
7425
7426 rsp->hdr.Status =
7427 STATUS_RANGE_NOT_LOCKED;
7428 kfree(smb_lock);
7429 goto out2;
7430 }
7431
7432 list_del(&smb_lock->llist);
7433 release_async_work(work);
7434 goto retry;
7435 } else if (!rc) {
7436 list_add(&smb_lock->llist, &rollback_list);
7437 spin_lock(&work->conn->llist_lock);
7438 list_add_tail(&smb_lock->clist,
7439 &work->conn->lock_list);
7440 list_add_tail(&smb_lock->flist,
7441 &fp->lock_list);
7442 spin_unlock(&work->conn->llist_lock);
7443 ksmbd_debug(SMB, "successful in taking lock\n");
7444 } else {
7445 goto out;
7446 }
7447 }
7448 }
7449
7450 if (atomic_read(&fp->f_ci->op_count) > 1)
7451 smb_break_all_oplock(work, fp);
7452
7453 rsp->StructureSize = cpu_to_le16(4);
7454 ksmbd_debug(SMB, "successful in taking lock\n");
7455 rsp->hdr.Status = STATUS_SUCCESS;
7456 rsp->Reserved = 0;
7457 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7458 if (err)
7459 goto out;
7460
7461 ksmbd_fd_put(work, fp);
7462 return 0;
7463
7464 out:
7465 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7466 locks_free_lock(smb_lock->fl);
7467 list_del(&smb_lock->llist);
7468 kfree(smb_lock);
7469 }
7470
7471 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7472 struct file_lock *rlock = NULL;
7473
7474 rlock = smb_flock_init(filp);
7475 rlock->fl_type = F_UNLCK;
7476 rlock->fl_start = smb_lock->start;
7477 rlock->fl_end = smb_lock->end;
7478
7479 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7480 if (rc)
7481 pr_err("rollback unlock fail : %d\n", rc);
7482
7483 list_del(&smb_lock->llist);
7484 spin_lock(&work->conn->llist_lock);
7485 if (!list_empty(&smb_lock->flist))
7486 list_del(&smb_lock->flist);
7487 list_del(&smb_lock->clist);
7488 spin_unlock(&work->conn->llist_lock);
7489
7490 locks_free_lock(smb_lock->fl);
7491 locks_free_lock(rlock);
7492 kfree(smb_lock);
7493 }
7494 out2:
7495 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7496
7497 if (!rsp->hdr.Status) {
7498 if (err == -EINVAL)
7499 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7500 else if (err == -ENOMEM)
7501 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7502 else if (err == -ENOENT)
7503 rsp->hdr.Status = STATUS_FILE_CLOSED;
7504 else
7505 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7506 }
7507
7508 smb2_set_err_rsp(work);
7509 ksmbd_fd_put(work, fp);
7510 return err;
7511 }
7512
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)7513 static int fsctl_copychunk(struct ksmbd_work *work,
7514 struct copychunk_ioctl_req *ci_req,
7515 unsigned int cnt_code,
7516 unsigned int input_count,
7517 unsigned long long volatile_id,
7518 unsigned long long persistent_id,
7519 struct smb2_ioctl_rsp *rsp)
7520 {
7521 struct copychunk_ioctl_rsp *ci_rsp;
7522 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7523 struct srv_copychunk *chunks;
7524 unsigned int i, chunk_count, chunk_count_written = 0;
7525 unsigned int chunk_size_written = 0;
7526 loff_t total_size_written = 0;
7527 int ret = 0;
7528
7529 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7530
7531 rsp->VolatileFileId = volatile_id;
7532 rsp->PersistentFileId = persistent_id;
7533 ci_rsp->ChunksWritten =
7534 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7535 ci_rsp->ChunkBytesWritten =
7536 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7537 ci_rsp->TotalBytesWritten =
7538 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7539
7540 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7541 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7542 if (chunk_count == 0)
7543 goto out;
7544 total_size_written = 0;
7545
7546 /* verify the SRV_COPYCHUNK_COPY packet */
7547 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7548 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7549 chunk_count * sizeof(struct srv_copychunk)) {
7550 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7551 return -EINVAL;
7552 }
7553
7554 for (i = 0; i < chunk_count; i++) {
7555 if (le32_to_cpu(chunks[i].Length) == 0 ||
7556 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7557 break;
7558 total_size_written += le32_to_cpu(chunks[i].Length);
7559 }
7560
7561 if (i < chunk_count ||
7562 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7563 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7564 return -EINVAL;
7565 }
7566
7567 src_fp = ksmbd_lookup_foreign_fd(work,
7568 le64_to_cpu(ci_req->ResumeKey[0]));
7569 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7570 ret = -EINVAL;
7571 if (!src_fp ||
7572 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7573 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7574 goto out;
7575 }
7576
7577 if (!dst_fp) {
7578 rsp->hdr.Status = STATUS_FILE_CLOSED;
7579 goto out;
7580 }
7581
7582 /*
7583 * FILE_READ_DATA should only be included in
7584 * the FSCTL_COPYCHUNK case
7585 */
7586 if (cnt_code == FSCTL_COPYCHUNK &&
7587 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7588 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7589 goto out;
7590 }
7591
7592 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7593 chunks, chunk_count,
7594 &chunk_count_written,
7595 &chunk_size_written,
7596 &total_size_written);
7597 if (ret < 0) {
7598 if (ret == -EACCES)
7599 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7600 if (ret == -EAGAIN)
7601 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7602 else if (ret == -EBADF)
7603 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7604 else if (ret == -EFBIG || ret == -ENOSPC)
7605 rsp->hdr.Status = STATUS_DISK_FULL;
7606 else if (ret == -EINVAL)
7607 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7608 else if (ret == -EISDIR)
7609 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7610 else if (ret == -E2BIG)
7611 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7612 else
7613 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7614 }
7615
7616 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7617 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7618 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7619 out:
7620 ksmbd_fd_put(work, src_fp);
7621 ksmbd_fd_put(work, dst_fp);
7622 return ret;
7623 }
7624
idev_ipv4_address(struct in_device * idev)7625 static __be32 idev_ipv4_address(struct in_device *idev)
7626 {
7627 __be32 addr = 0;
7628
7629 struct in_ifaddr *ifa;
7630
7631 rcu_read_lock();
7632 in_dev_for_each_ifa_rcu(ifa, idev) {
7633 if (ifa->ifa_flags & IFA_F_SECONDARY)
7634 continue;
7635
7636 addr = ifa->ifa_address;
7637 break;
7638 }
7639 rcu_read_unlock();
7640 return addr;
7641 }
7642
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7643 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7644 struct smb2_ioctl_rsp *rsp,
7645 unsigned int out_buf_len)
7646 {
7647 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7648 int nbytes = 0;
7649 struct net_device *netdev;
7650 struct sockaddr_storage_rsp *sockaddr_storage;
7651 unsigned int flags;
7652 unsigned long long speed;
7653
7654 rtnl_lock();
7655 for_each_netdev(&init_net, netdev) {
7656 bool ipv4_set = false;
7657
7658 if (netdev->type == ARPHRD_LOOPBACK)
7659 continue;
7660
7661 flags = dev_get_flags(netdev);
7662 if (!(flags & IFF_RUNNING))
7663 continue;
7664 ipv6_retry:
7665 if (out_buf_len <
7666 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7667 rtnl_unlock();
7668 return -ENOSPC;
7669 }
7670
7671 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7672 &rsp->Buffer[nbytes];
7673 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7674
7675 nii_rsp->Capability = 0;
7676 if (netdev->real_num_tx_queues > 1)
7677 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7678 if (ksmbd_rdma_capable_netdev(netdev))
7679 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7680
7681 nii_rsp->Next = cpu_to_le32(152);
7682 nii_rsp->Reserved = 0;
7683
7684 if (netdev->ethtool_ops->get_link_ksettings) {
7685 struct ethtool_link_ksettings cmd;
7686
7687 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7688 speed = cmd.base.speed;
7689 } else {
7690 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7691 "speed is unknown, defaulting to 1Gb/sec");
7692 speed = SPEED_1000;
7693 }
7694
7695 speed *= 1000000;
7696 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7697
7698 sockaddr_storage = (struct sockaddr_storage_rsp *)
7699 nii_rsp->SockAddr_Storage;
7700 memset(sockaddr_storage, 0, 128);
7701
7702 if (!ipv4_set) {
7703 struct in_device *idev;
7704
7705 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7706 sockaddr_storage->addr4.Port = 0;
7707
7708 idev = __in_dev_get_rtnl(netdev);
7709 if (!idev)
7710 continue;
7711 sockaddr_storage->addr4.IPv4address =
7712 idev_ipv4_address(idev);
7713 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7714 ipv4_set = true;
7715 goto ipv6_retry;
7716 } else {
7717 struct inet6_dev *idev6;
7718 struct inet6_ifaddr *ifa;
7719 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7720
7721 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7722 sockaddr_storage->addr6.Port = 0;
7723 sockaddr_storage->addr6.FlowInfo = 0;
7724
7725 idev6 = __in6_dev_get(netdev);
7726 if (!idev6)
7727 continue;
7728
7729 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7730 if (ifa->flags & (IFA_F_TENTATIVE |
7731 IFA_F_DEPRECATED))
7732 continue;
7733 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7734 break;
7735 }
7736 sockaddr_storage->addr6.ScopeId = 0;
7737 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7738 }
7739 }
7740 rtnl_unlock();
7741
7742 /* zero if this is last one */
7743 if (nii_rsp)
7744 nii_rsp->Next = 0;
7745
7746 rsp->PersistentFileId = SMB2_NO_FID;
7747 rsp->VolatileFileId = SMB2_NO_FID;
7748 return nbytes;
7749 }
7750
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)7751 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7752 struct validate_negotiate_info_req *neg_req,
7753 struct validate_negotiate_info_rsp *neg_rsp,
7754 unsigned int in_buf_len)
7755 {
7756 int ret = 0;
7757 int dialect;
7758
7759 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7760 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7761 return -EINVAL;
7762
7763 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7764 neg_req->DialectCount);
7765 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7766 ret = -EINVAL;
7767 goto err_out;
7768 }
7769
7770 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7771 ret = -EINVAL;
7772 goto err_out;
7773 }
7774
7775 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7776 ret = -EINVAL;
7777 goto err_out;
7778 }
7779
7780 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7781 ret = -EINVAL;
7782 goto err_out;
7783 }
7784
7785 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7786 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7787 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7788 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7789 err_out:
7790 return ret;
7791 }
7792
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)7793 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7794 struct file_allocated_range_buffer *qar_req,
7795 struct file_allocated_range_buffer *qar_rsp,
7796 unsigned int in_count, unsigned int *out_count)
7797 {
7798 struct ksmbd_file *fp;
7799 loff_t start, length;
7800 int ret = 0;
7801
7802 *out_count = 0;
7803 if (in_count == 0)
7804 return -EINVAL;
7805
7806 start = le64_to_cpu(qar_req->file_offset);
7807 length = le64_to_cpu(qar_req->length);
7808
7809 if (start < 0 || length < 0)
7810 return -EINVAL;
7811
7812 fp = ksmbd_lookup_fd_fast(work, id);
7813 if (!fp)
7814 return -ENOENT;
7815
7816 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7817 qar_rsp, in_count, out_count);
7818 if (ret && ret != -E2BIG)
7819 *out_count = 0;
7820
7821 ksmbd_fd_put(work, fp);
7822 return ret;
7823 }
7824
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7825 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7826 unsigned int out_buf_len,
7827 struct smb2_ioctl_req *req,
7828 struct smb2_ioctl_rsp *rsp)
7829 {
7830 struct ksmbd_rpc_command *rpc_resp;
7831 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7832 int nbytes = 0;
7833
7834 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7835 le32_to_cpu(req->InputCount));
7836 if (rpc_resp) {
7837 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7838 /*
7839 * set STATUS_SOME_NOT_MAPPED response
7840 * for unknown domain sid.
7841 */
7842 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7843 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7844 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7845 goto out;
7846 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7847 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7848 goto out;
7849 }
7850
7851 nbytes = rpc_resp->payload_sz;
7852 if (rpc_resp->payload_sz > out_buf_len) {
7853 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7854 nbytes = out_buf_len;
7855 }
7856
7857 if (!rpc_resp->payload_sz) {
7858 rsp->hdr.Status =
7859 STATUS_UNEXPECTED_IO_ERROR;
7860 goto out;
7861 }
7862
7863 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7864 }
7865 out:
7866 kvfree(rpc_resp);
7867 return nbytes;
7868 }
7869
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7870 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7871 struct file_sparse *sparse)
7872 {
7873 struct ksmbd_file *fp;
7874 struct mnt_idmap *idmap;
7875 int ret = 0;
7876 __le32 old_fattr;
7877
7878 fp = ksmbd_lookup_fd_fast(work, id);
7879 if (!fp)
7880 return -ENOENT;
7881 idmap = file_mnt_idmap(fp->filp);
7882
7883 old_fattr = fp->f_ci->m_fattr;
7884 if (sparse->SetSparse)
7885 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7886 else
7887 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7888
7889 if (fp->f_ci->m_fattr != old_fattr &&
7890 test_share_config_flag(work->tcon->share_conf,
7891 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7892 struct xattr_dos_attrib da;
7893
7894 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7895 fp->filp->f_path.dentry, &da);
7896 if (ret <= 0)
7897 goto out;
7898
7899 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7900 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7901 &fp->filp->f_path,
7902 &da, true);
7903 if (ret)
7904 fp->f_ci->m_fattr = old_fattr;
7905 }
7906
7907 out:
7908 ksmbd_fd_put(work, fp);
7909 return ret;
7910 }
7911
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)7912 static int fsctl_request_resume_key(struct ksmbd_work *work,
7913 struct smb2_ioctl_req *req,
7914 struct resume_key_ioctl_rsp *key_rsp)
7915 {
7916 struct ksmbd_file *fp;
7917
7918 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7919 if (!fp)
7920 return -ENOENT;
7921
7922 memset(key_rsp, 0, sizeof(*key_rsp));
7923 key_rsp->ResumeKey[0] = req->VolatileFileId;
7924 key_rsp->ResumeKey[1] = req->PersistentFileId;
7925 ksmbd_fd_put(work, fp);
7926
7927 return 0;
7928 }
7929
7930 /**
7931 * smb2_ioctl() - handler for smb2 ioctl command
7932 * @work: smb work containing ioctl command buffer
7933 *
7934 * Return: 0 on success, otherwise error
7935 */
smb2_ioctl(struct ksmbd_work * work)7936 int smb2_ioctl(struct ksmbd_work *work)
7937 {
7938 struct smb2_ioctl_req *req;
7939 struct smb2_ioctl_rsp *rsp;
7940 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7941 u64 id = KSMBD_NO_FID;
7942 struct ksmbd_conn *conn = work->conn;
7943 int ret = 0;
7944 char *buffer;
7945
7946 if (work->next_smb2_rcv_hdr_off) {
7947 req = ksmbd_req_buf_next(work);
7948 rsp = ksmbd_resp_buf_next(work);
7949 if (!has_file_id(req->VolatileFileId)) {
7950 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7951 work->compound_fid);
7952 id = work->compound_fid;
7953 }
7954 } else {
7955 req = smb2_get_msg(work->request_buf);
7956 rsp = smb2_get_msg(work->response_buf);
7957 }
7958
7959 if (!has_file_id(id))
7960 id = req->VolatileFileId;
7961
7962 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7963 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7964 goto out;
7965 }
7966
7967 buffer = (char *)req + le32_to_cpu(req->InputOffset);
7968
7969 cnt_code = le32_to_cpu(req->CtlCode);
7970 ret = smb2_calc_max_out_buf_len(work, 48,
7971 le32_to_cpu(req->MaxOutputResponse));
7972 if (ret < 0) {
7973 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7974 goto out;
7975 }
7976 out_buf_len = (unsigned int)ret;
7977 in_buf_len = le32_to_cpu(req->InputCount);
7978
7979 switch (cnt_code) {
7980 case FSCTL_DFS_GET_REFERRALS:
7981 case FSCTL_DFS_GET_REFERRALS_EX:
7982 /* Not support DFS yet */
7983 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7984 goto out;
7985 case FSCTL_CREATE_OR_GET_OBJECT_ID:
7986 {
7987 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7988
7989 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7990 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7991 &rsp->Buffer[0];
7992
7993 /*
7994 * TODO: This is dummy implementation to pass smbtorture
7995 * Need to check correct response later
7996 */
7997 memset(obj_buf->ObjectId, 0x0, 16);
7998 memset(obj_buf->BirthVolumeId, 0x0, 16);
7999 memset(obj_buf->BirthObjectId, 0x0, 16);
8000 memset(obj_buf->DomainId, 0x0, 16);
8001
8002 break;
8003 }
8004 case FSCTL_PIPE_TRANSCEIVE:
8005 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8006 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8007 break;
8008 case FSCTL_VALIDATE_NEGOTIATE_INFO:
8009 if (conn->dialect < SMB30_PROT_ID) {
8010 ret = -EOPNOTSUPP;
8011 goto out;
8012 }
8013
8014 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8015 Dialects)) {
8016 ret = -EINVAL;
8017 goto out;
8018 }
8019
8020 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8021 ret = -EINVAL;
8022 goto out;
8023 }
8024
8025 ret = fsctl_validate_negotiate_info(conn,
8026 (struct validate_negotiate_info_req *)buffer,
8027 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8028 in_buf_len);
8029 if (ret < 0)
8030 goto out;
8031
8032 nbytes = sizeof(struct validate_negotiate_info_rsp);
8033 rsp->PersistentFileId = SMB2_NO_FID;
8034 rsp->VolatileFileId = SMB2_NO_FID;
8035 break;
8036 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8037 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8038 if (ret < 0)
8039 goto out;
8040 nbytes = ret;
8041 break;
8042 case FSCTL_REQUEST_RESUME_KEY:
8043 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8044 ret = -EINVAL;
8045 goto out;
8046 }
8047
8048 ret = fsctl_request_resume_key(work, req,
8049 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8050 if (ret < 0)
8051 goto out;
8052 rsp->PersistentFileId = req->PersistentFileId;
8053 rsp->VolatileFileId = req->VolatileFileId;
8054 nbytes = sizeof(struct resume_key_ioctl_rsp);
8055 break;
8056 case FSCTL_COPYCHUNK:
8057 case FSCTL_COPYCHUNK_WRITE:
8058 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8059 ksmbd_debug(SMB,
8060 "User does not have write permission\n");
8061 ret = -EACCES;
8062 goto out;
8063 }
8064
8065 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
8066 ret = -EINVAL;
8067 goto out;
8068 }
8069
8070 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8071 ret = -EINVAL;
8072 goto out;
8073 }
8074
8075 nbytes = sizeof(struct copychunk_ioctl_rsp);
8076 rsp->VolatileFileId = req->VolatileFileId;
8077 rsp->PersistentFileId = req->PersistentFileId;
8078 fsctl_copychunk(work,
8079 (struct copychunk_ioctl_req *)buffer,
8080 le32_to_cpu(req->CtlCode),
8081 le32_to_cpu(req->InputCount),
8082 req->VolatileFileId,
8083 req->PersistentFileId,
8084 rsp);
8085 break;
8086 case FSCTL_SET_SPARSE:
8087 if (in_buf_len < sizeof(struct file_sparse)) {
8088 ret = -EINVAL;
8089 goto out;
8090 }
8091
8092 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8093 if (ret < 0)
8094 goto out;
8095 break;
8096 case FSCTL_SET_ZERO_DATA:
8097 {
8098 struct file_zero_data_information *zero_data;
8099 struct ksmbd_file *fp;
8100 loff_t off, len, bfz;
8101
8102 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8103 ksmbd_debug(SMB,
8104 "User does not have write permission\n");
8105 ret = -EACCES;
8106 goto out;
8107 }
8108
8109 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8110 ret = -EINVAL;
8111 goto out;
8112 }
8113
8114 zero_data =
8115 (struct file_zero_data_information *)buffer;
8116
8117 off = le64_to_cpu(zero_data->FileOffset);
8118 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8119 if (off < 0 || bfz < 0 || off > bfz) {
8120 ret = -EINVAL;
8121 goto out;
8122 }
8123
8124 len = bfz - off;
8125 if (len) {
8126 fp = ksmbd_lookup_fd_fast(work, id);
8127 if (!fp) {
8128 ret = -ENOENT;
8129 goto out;
8130 }
8131
8132 ret = ksmbd_vfs_zero_data(work, fp, off, len);
8133 ksmbd_fd_put(work, fp);
8134 if (ret < 0)
8135 goto out;
8136 }
8137 break;
8138 }
8139 case FSCTL_QUERY_ALLOCATED_RANGES:
8140 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8141 ret = -EINVAL;
8142 goto out;
8143 }
8144
8145 ret = fsctl_query_allocated_ranges(work, id,
8146 (struct file_allocated_range_buffer *)buffer,
8147 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8148 out_buf_len /
8149 sizeof(struct file_allocated_range_buffer), &nbytes);
8150 if (ret == -E2BIG) {
8151 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8152 } else if (ret < 0) {
8153 nbytes = 0;
8154 goto out;
8155 }
8156
8157 nbytes *= sizeof(struct file_allocated_range_buffer);
8158 break;
8159 case FSCTL_GET_REPARSE_POINT:
8160 {
8161 struct reparse_data_buffer *reparse_ptr;
8162 struct ksmbd_file *fp;
8163
8164 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8165 fp = ksmbd_lookup_fd_fast(work, id);
8166 if (!fp) {
8167 pr_err("not found fp!!\n");
8168 ret = -ENOENT;
8169 goto out;
8170 }
8171
8172 reparse_ptr->ReparseTag =
8173 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8174 reparse_ptr->ReparseDataLength = 0;
8175 ksmbd_fd_put(work, fp);
8176 nbytes = sizeof(struct reparse_data_buffer);
8177 break;
8178 }
8179 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8180 {
8181 struct ksmbd_file *fp_in, *fp_out = NULL;
8182 struct duplicate_extents_to_file *dup_ext;
8183 loff_t src_off, dst_off, length, cloned;
8184
8185 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8186 ret = -EINVAL;
8187 goto out;
8188 }
8189
8190 dup_ext = (struct duplicate_extents_to_file *)buffer;
8191
8192 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8193 dup_ext->PersistentFileHandle);
8194 if (!fp_in) {
8195 pr_err("not found file handle in duplicate extent to file\n");
8196 ret = -ENOENT;
8197 goto out;
8198 }
8199
8200 fp_out = ksmbd_lookup_fd_fast(work, id);
8201 if (!fp_out) {
8202 pr_err("not found fp\n");
8203 ret = -ENOENT;
8204 goto dup_ext_out;
8205 }
8206
8207 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8208 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8209 length = le64_to_cpu(dup_ext->ByteCount);
8210 /*
8211 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8212 * should fall back to vfs_copy_file_range(). This could be
8213 * beneficial when re-exporting nfs/smb mount, but note that
8214 * this can result in partial copy that returns an error status.
8215 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8216 * fall back to vfs_copy_file_range(), should be avoided when
8217 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8218 */
8219 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8220 fp_out->filp, dst_off, length, 0);
8221 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8222 ret = -EOPNOTSUPP;
8223 goto dup_ext_out;
8224 } else if (cloned != length) {
8225 cloned = vfs_copy_file_range(fp_in->filp, src_off,
8226 fp_out->filp, dst_off,
8227 length, 0);
8228 if (cloned != length) {
8229 if (cloned < 0)
8230 ret = cloned;
8231 else
8232 ret = -EINVAL;
8233 }
8234 }
8235
8236 dup_ext_out:
8237 ksmbd_fd_put(work, fp_in);
8238 ksmbd_fd_put(work, fp_out);
8239 if (ret < 0)
8240 goto out;
8241 break;
8242 }
8243 default:
8244 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8245 cnt_code);
8246 ret = -EOPNOTSUPP;
8247 goto out;
8248 }
8249
8250 rsp->CtlCode = cpu_to_le32(cnt_code);
8251 rsp->InputCount = cpu_to_le32(0);
8252 rsp->InputOffset = cpu_to_le32(112);
8253 rsp->OutputOffset = cpu_to_le32(112);
8254 rsp->OutputCount = cpu_to_le32(nbytes);
8255 rsp->StructureSize = cpu_to_le16(49);
8256 rsp->Reserved = cpu_to_le16(0);
8257 rsp->Flags = cpu_to_le32(0);
8258 rsp->Reserved2 = cpu_to_le32(0);
8259 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8260 if (!ret)
8261 return ret;
8262
8263 out:
8264 if (ret == -EACCES)
8265 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8266 else if (ret == -ENOENT)
8267 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8268 else if (ret == -EOPNOTSUPP)
8269 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8270 else if (ret == -ENOSPC)
8271 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8272 else if (ret < 0 || rsp->hdr.Status == 0)
8273 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8274 smb2_set_err_rsp(work);
8275 return 0;
8276 }
8277
8278 /**
8279 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8280 * @work: smb work containing oplock break command buffer
8281 *
8282 * Return: 0
8283 */
smb20_oplock_break_ack(struct ksmbd_work * work)8284 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8285 {
8286 struct smb2_oplock_break *req;
8287 struct smb2_oplock_break *rsp;
8288 struct ksmbd_file *fp;
8289 struct oplock_info *opinfo = NULL;
8290 __le32 err = 0;
8291 int ret = 0;
8292 u64 volatile_id, persistent_id;
8293 char req_oplevel = 0, rsp_oplevel = 0;
8294 unsigned int oplock_change_type;
8295
8296 WORK_BUFFERS(work, req, rsp);
8297
8298 volatile_id = req->VolatileFid;
8299 persistent_id = req->PersistentFid;
8300 req_oplevel = req->OplockLevel;
8301 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8302 volatile_id, persistent_id, req_oplevel);
8303
8304 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8305 if (!fp) {
8306 rsp->hdr.Status = STATUS_FILE_CLOSED;
8307 smb2_set_err_rsp(work);
8308 return;
8309 }
8310
8311 opinfo = opinfo_get(fp);
8312 if (!opinfo) {
8313 pr_err("unexpected null oplock_info\n");
8314 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8315 smb2_set_err_rsp(work);
8316 ksmbd_fd_put(work, fp);
8317 return;
8318 }
8319
8320 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8321 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8322 goto err_out;
8323 }
8324
8325 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8326 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8327 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8328 goto err_out;
8329 }
8330
8331 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8332 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8333 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8334 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8335 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8336 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8337 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8338 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8339 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8340 oplock_change_type = OPLOCK_READ_TO_NONE;
8341 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8342 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8343 err = STATUS_INVALID_DEVICE_STATE;
8344 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8345 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8346 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8347 oplock_change_type = OPLOCK_WRITE_TO_READ;
8348 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8349 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8350 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8351 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8352 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8353 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8354 oplock_change_type = OPLOCK_READ_TO_NONE;
8355 } else {
8356 oplock_change_type = 0;
8357 }
8358 } else {
8359 oplock_change_type = 0;
8360 }
8361
8362 switch (oplock_change_type) {
8363 case OPLOCK_WRITE_TO_READ:
8364 ret = opinfo_write_to_read(opinfo);
8365 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8366 break;
8367 case OPLOCK_WRITE_TO_NONE:
8368 ret = opinfo_write_to_none(opinfo);
8369 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8370 break;
8371 case OPLOCK_READ_TO_NONE:
8372 ret = opinfo_read_to_none(opinfo);
8373 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8374 break;
8375 default:
8376 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8377 opinfo->level, rsp_oplevel);
8378 }
8379
8380 if (ret < 0) {
8381 rsp->hdr.Status = err;
8382 goto err_out;
8383 }
8384
8385 opinfo->op_state = OPLOCK_STATE_NONE;
8386 wake_up_interruptible_all(&opinfo->oplock_q);
8387 opinfo_put(opinfo);
8388 ksmbd_fd_put(work, fp);
8389
8390 rsp->StructureSize = cpu_to_le16(24);
8391 rsp->OplockLevel = rsp_oplevel;
8392 rsp->Reserved = 0;
8393 rsp->Reserved2 = 0;
8394 rsp->VolatileFid = volatile_id;
8395 rsp->PersistentFid = persistent_id;
8396 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8397 if (!ret)
8398 return;
8399
8400 err_out:
8401 opinfo->op_state = OPLOCK_STATE_NONE;
8402 wake_up_interruptible_all(&opinfo->oplock_q);
8403
8404 opinfo_put(opinfo);
8405 ksmbd_fd_put(work, fp);
8406 smb2_set_err_rsp(work);
8407 }
8408
check_lease_state(struct lease * lease,__le32 req_state)8409 static int check_lease_state(struct lease *lease, __le32 req_state)
8410 {
8411 if ((lease->new_state ==
8412 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8413 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8414 lease->new_state = req_state;
8415 return 0;
8416 }
8417
8418 if (lease->new_state == req_state)
8419 return 0;
8420
8421 return 1;
8422 }
8423
8424 /**
8425 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8426 * @work: smb work containing lease break command buffer
8427 *
8428 * Return: 0
8429 */
smb21_lease_break_ack(struct ksmbd_work * work)8430 static void smb21_lease_break_ack(struct ksmbd_work *work)
8431 {
8432 struct ksmbd_conn *conn = work->conn;
8433 struct smb2_lease_ack *req;
8434 struct smb2_lease_ack *rsp;
8435 struct oplock_info *opinfo;
8436 __le32 err = 0;
8437 int ret = 0;
8438 unsigned int lease_change_type;
8439 __le32 lease_state;
8440 struct lease *lease;
8441
8442 WORK_BUFFERS(work, req, rsp);
8443
8444 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8445 le32_to_cpu(req->LeaseState));
8446 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8447 if (!opinfo) {
8448 ksmbd_debug(OPLOCK, "file not opened\n");
8449 smb2_set_err_rsp(work);
8450 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8451 return;
8452 }
8453 lease = opinfo->o_lease;
8454
8455 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8456 pr_err("unexpected lease break state 0x%x\n",
8457 opinfo->op_state);
8458 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8459 goto err_out;
8460 }
8461
8462 if (check_lease_state(lease, req->LeaseState)) {
8463 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8464 ksmbd_debug(OPLOCK,
8465 "req lease state: 0x%x, expected state: 0x%x\n",
8466 req->LeaseState, lease->new_state);
8467 goto err_out;
8468 }
8469
8470 if (!atomic_read(&opinfo->breaking_cnt)) {
8471 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8472 goto err_out;
8473 }
8474
8475 /* check for bad lease state */
8476 if (req->LeaseState &
8477 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8478 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8479 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8480 lease_change_type = OPLOCK_WRITE_TO_NONE;
8481 else
8482 lease_change_type = OPLOCK_READ_TO_NONE;
8483 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8484 le32_to_cpu(lease->state),
8485 le32_to_cpu(req->LeaseState));
8486 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8487 req->LeaseState != SMB2_LEASE_NONE_LE) {
8488 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8489 lease_change_type = OPLOCK_READ_TO_NONE;
8490 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8491 le32_to_cpu(lease->state),
8492 le32_to_cpu(req->LeaseState));
8493 } else {
8494 /* valid lease state changes */
8495 err = STATUS_INVALID_DEVICE_STATE;
8496 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8497 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8498 lease_change_type = OPLOCK_WRITE_TO_NONE;
8499 else
8500 lease_change_type = OPLOCK_READ_TO_NONE;
8501 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8502 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8503 lease_change_type = OPLOCK_WRITE_TO_READ;
8504 else
8505 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8506 } else {
8507 lease_change_type = 0;
8508 }
8509 }
8510
8511 switch (lease_change_type) {
8512 case OPLOCK_WRITE_TO_READ:
8513 ret = opinfo_write_to_read(opinfo);
8514 break;
8515 case OPLOCK_READ_HANDLE_TO_READ:
8516 ret = opinfo_read_handle_to_read(opinfo);
8517 break;
8518 case OPLOCK_WRITE_TO_NONE:
8519 ret = opinfo_write_to_none(opinfo);
8520 break;
8521 case OPLOCK_READ_TO_NONE:
8522 ret = opinfo_read_to_none(opinfo);
8523 break;
8524 default:
8525 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8526 le32_to_cpu(lease->state),
8527 le32_to_cpu(req->LeaseState));
8528 }
8529
8530 if (ret < 0) {
8531 rsp->hdr.Status = err;
8532 goto err_out;
8533 }
8534
8535 lease_state = lease->state;
8536 opinfo->op_state = OPLOCK_STATE_NONE;
8537 wake_up_interruptible_all(&opinfo->oplock_q);
8538 atomic_dec(&opinfo->breaking_cnt);
8539 wake_up_interruptible_all(&opinfo->oplock_brk);
8540 opinfo_put(opinfo);
8541
8542 rsp->StructureSize = cpu_to_le16(36);
8543 rsp->Reserved = 0;
8544 rsp->Flags = 0;
8545 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8546 rsp->LeaseState = lease_state;
8547 rsp->LeaseDuration = 0;
8548 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8549 if (!ret)
8550 return;
8551
8552 err_out:
8553 wake_up_interruptible_all(&opinfo->oplock_q);
8554 atomic_dec(&opinfo->breaking_cnt);
8555 wake_up_interruptible_all(&opinfo->oplock_brk);
8556
8557 opinfo_put(opinfo);
8558 smb2_set_err_rsp(work);
8559 }
8560
8561 /**
8562 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8563 * @work: smb work containing oplock/lease break command buffer
8564 *
8565 * Return: 0
8566 */
smb2_oplock_break(struct ksmbd_work * work)8567 int smb2_oplock_break(struct ksmbd_work *work)
8568 {
8569 struct smb2_oplock_break *req;
8570 struct smb2_oplock_break *rsp;
8571
8572 WORK_BUFFERS(work, req, rsp);
8573
8574 switch (le16_to_cpu(req->StructureSize)) {
8575 case OP_BREAK_STRUCT_SIZE_20:
8576 smb20_oplock_break_ack(work);
8577 break;
8578 case OP_BREAK_STRUCT_SIZE_21:
8579 smb21_lease_break_ack(work);
8580 break;
8581 default:
8582 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8583 le16_to_cpu(req->StructureSize));
8584 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8585 smb2_set_err_rsp(work);
8586 }
8587
8588 return 0;
8589 }
8590
8591 /**
8592 * smb2_notify() - handler for smb2 notify request
8593 * @work: smb work containing notify command buffer
8594 *
8595 * Return: 0
8596 */
smb2_notify(struct ksmbd_work * work)8597 int smb2_notify(struct ksmbd_work *work)
8598 {
8599 struct smb2_change_notify_req *req;
8600 struct smb2_change_notify_rsp *rsp;
8601
8602 WORK_BUFFERS(work, req, rsp);
8603
8604 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8605 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8606 smb2_set_err_rsp(work);
8607 return 0;
8608 }
8609
8610 smb2_set_err_rsp(work);
8611 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8612 return 0;
8613 }
8614
8615 /**
8616 * smb2_is_sign_req() - handler for checking packet signing status
8617 * @work: smb work containing notify command buffer
8618 * @command: SMB2 command id
8619 *
8620 * Return: true if packed is signed, false otherwise
8621 */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8622 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8623 {
8624 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8625
8626 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8627 command != SMB2_NEGOTIATE_HE &&
8628 command != SMB2_SESSION_SETUP_HE &&
8629 command != SMB2_OPLOCK_BREAK_HE)
8630 return true;
8631
8632 return false;
8633 }
8634
8635 /**
8636 * smb2_check_sign_req() - handler for req packet sign processing
8637 * @work: smb work containing notify command buffer
8638 *
8639 * Return: 1 on success, 0 otherwise
8640 */
smb2_check_sign_req(struct ksmbd_work * work)8641 int smb2_check_sign_req(struct ksmbd_work *work)
8642 {
8643 struct smb2_hdr *hdr;
8644 char signature_req[SMB2_SIGNATURE_SIZE];
8645 char signature[SMB2_HMACSHA256_SIZE];
8646 struct kvec iov[1];
8647 size_t len;
8648
8649 hdr = smb2_get_msg(work->request_buf);
8650 if (work->next_smb2_rcv_hdr_off)
8651 hdr = ksmbd_req_buf_next(work);
8652
8653 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8654 len = get_rfc1002_len(work->request_buf);
8655 else if (hdr->NextCommand)
8656 len = le32_to_cpu(hdr->NextCommand);
8657 else
8658 len = get_rfc1002_len(work->request_buf) -
8659 work->next_smb2_rcv_hdr_off;
8660
8661 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8662 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8663
8664 iov[0].iov_base = (char *)&hdr->ProtocolId;
8665 iov[0].iov_len = len;
8666
8667 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8668 signature))
8669 return 0;
8670
8671 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8672 pr_err("bad smb2 signature\n");
8673 return 0;
8674 }
8675
8676 return 1;
8677 }
8678
8679 /**
8680 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8681 * @work: smb work containing notify command buffer
8682 *
8683 */
smb2_set_sign_rsp(struct ksmbd_work * work)8684 void smb2_set_sign_rsp(struct ksmbd_work *work)
8685 {
8686 struct smb2_hdr *hdr;
8687 char signature[SMB2_HMACSHA256_SIZE];
8688 struct kvec *iov;
8689 int n_vec = 1;
8690
8691 hdr = ksmbd_resp_buf_curr(work);
8692 hdr->Flags |= SMB2_FLAGS_SIGNED;
8693 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8694
8695 if (hdr->Command == SMB2_READ) {
8696 iov = &work->iov[work->iov_idx - 1];
8697 n_vec++;
8698 } else {
8699 iov = &work->iov[work->iov_idx];
8700 }
8701
8702 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8703 signature))
8704 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8705 }
8706
8707 /**
8708 * smb3_check_sign_req() - handler for req packet sign processing
8709 * @work: smb work containing notify command buffer
8710 *
8711 * Return: 1 on success, 0 otherwise
8712 */
smb3_check_sign_req(struct ksmbd_work * work)8713 int smb3_check_sign_req(struct ksmbd_work *work)
8714 {
8715 struct ksmbd_conn *conn = work->conn;
8716 char *signing_key;
8717 struct smb2_hdr *hdr;
8718 struct channel *chann;
8719 char signature_req[SMB2_SIGNATURE_SIZE];
8720 char signature[SMB2_CMACAES_SIZE];
8721 struct kvec iov[1];
8722 size_t len;
8723
8724 hdr = smb2_get_msg(work->request_buf);
8725 if (work->next_smb2_rcv_hdr_off)
8726 hdr = ksmbd_req_buf_next(work);
8727
8728 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8729 len = get_rfc1002_len(work->request_buf);
8730 else if (hdr->NextCommand)
8731 len = le32_to_cpu(hdr->NextCommand);
8732 else
8733 len = get_rfc1002_len(work->request_buf) -
8734 work->next_smb2_rcv_hdr_off;
8735
8736 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8737 signing_key = work->sess->smb3signingkey;
8738 } else {
8739 chann = lookup_chann_list(work->sess, conn);
8740 if (!chann) {
8741 return 0;
8742 }
8743 signing_key = chann->smb3signingkey;
8744 }
8745
8746 if (!signing_key) {
8747 pr_err("SMB3 signing key is not generated\n");
8748 return 0;
8749 }
8750
8751 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8752 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8753 iov[0].iov_base = (char *)&hdr->ProtocolId;
8754 iov[0].iov_len = len;
8755
8756 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8757 return 0;
8758
8759 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8760 pr_err("bad smb2 signature\n");
8761 return 0;
8762 }
8763
8764 return 1;
8765 }
8766
8767 /**
8768 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8769 * @work: smb work containing notify command buffer
8770 *
8771 */
smb3_set_sign_rsp(struct ksmbd_work * work)8772 void smb3_set_sign_rsp(struct ksmbd_work *work)
8773 {
8774 struct ksmbd_conn *conn = work->conn;
8775 struct smb2_hdr *hdr;
8776 struct channel *chann;
8777 char signature[SMB2_CMACAES_SIZE];
8778 struct kvec *iov;
8779 int n_vec = 1;
8780 char *signing_key;
8781
8782 hdr = ksmbd_resp_buf_curr(work);
8783
8784 if (conn->binding == false &&
8785 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8786 signing_key = work->sess->smb3signingkey;
8787 } else {
8788 chann = lookup_chann_list(work->sess, work->conn);
8789 if (!chann) {
8790 return;
8791 }
8792 signing_key = chann->smb3signingkey;
8793 }
8794
8795 if (!signing_key)
8796 return;
8797
8798 hdr->Flags |= SMB2_FLAGS_SIGNED;
8799 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8800
8801 if (hdr->Command == SMB2_READ) {
8802 iov = &work->iov[work->iov_idx - 1];
8803 n_vec++;
8804 } else {
8805 iov = &work->iov[work->iov_idx];
8806 }
8807
8808 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8809 signature))
8810 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8811 }
8812
8813 /**
8814 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8815 * @work: smb work containing response buffer
8816 *
8817 */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8818 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8819 {
8820 struct ksmbd_conn *conn = work->conn;
8821 struct ksmbd_session *sess = work->sess;
8822 struct smb2_hdr *req, *rsp;
8823
8824 if (conn->dialect != SMB311_PROT_ID)
8825 return;
8826
8827 WORK_BUFFERS(work, req, rsp);
8828
8829 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8830 conn->preauth_info)
8831 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8832 conn->preauth_info->Preauth_HashValue);
8833
8834 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8835 __u8 *hash_value;
8836
8837 if (conn->binding) {
8838 struct preauth_session *preauth_sess;
8839
8840 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8841 if (!preauth_sess)
8842 return;
8843 hash_value = preauth_sess->Preauth_HashValue;
8844 } else {
8845 hash_value = sess->Preauth_HashValue;
8846 if (!hash_value)
8847 return;
8848 }
8849 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8850 hash_value);
8851 }
8852 }
8853
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8854 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8855 {
8856 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8857 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8858 unsigned int orig_len = get_rfc1002_len(old_buf);
8859
8860 /* tr_buf must be cleared by the caller */
8861 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8862 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8863 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8864 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8865 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8866 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8867 else
8868 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8869 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8870 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8871 inc_rfc1001_len(tr_buf, orig_len);
8872 }
8873
smb3_encrypt_resp(struct ksmbd_work * work)8874 int smb3_encrypt_resp(struct ksmbd_work *work)
8875 {
8876 struct kvec *iov = work->iov;
8877 int rc = -ENOMEM;
8878 void *tr_buf;
8879
8880 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8881 if (!tr_buf)
8882 return rc;
8883
8884 /* fill transform header */
8885 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8886
8887 iov[0].iov_base = tr_buf;
8888 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8889 work->tr_buf = tr_buf;
8890
8891 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8892 }
8893
smb3_is_transform_hdr(void * buf)8894 bool smb3_is_transform_hdr(void *buf)
8895 {
8896 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8897
8898 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8899 }
8900
smb3_decrypt_req(struct ksmbd_work * work)8901 int smb3_decrypt_req(struct ksmbd_work *work)
8902 {
8903 struct ksmbd_session *sess;
8904 char *buf = work->request_buf;
8905 unsigned int pdu_length = get_rfc1002_len(buf);
8906 struct kvec iov[2];
8907 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8908 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8909 int rc = 0;
8910
8911 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8912 buf_data_size < sizeof(struct smb2_hdr)) {
8913 pr_err("Transform message is too small (%u)\n",
8914 pdu_length);
8915 return -ECONNABORTED;
8916 }
8917
8918 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8919 pr_err("Transform message is broken\n");
8920 return -ECONNABORTED;
8921 }
8922
8923 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8924 if (!sess) {
8925 pr_err("invalid session id(%llx) in transform header\n",
8926 le64_to_cpu(tr_hdr->SessionId));
8927 return -ECONNABORTED;
8928 }
8929
8930 iov[0].iov_base = buf;
8931 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8932 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8933 iov[1].iov_len = buf_data_size;
8934 rc = ksmbd_crypt_message(work, iov, 2, 0);
8935 if (rc)
8936 return rc;
8937
8938 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8939 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8940
8941 return rc;
8942 }
8943
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)8944 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8945 {
8946 struct ksmbd_conn *conn = work->conn;
8947 struct ksmbd_session *sess = work->sess;
8948 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8949
8950 if (conn->dialect < SMB30_PROT_ID)
8951 return false;
8952
8953 if (work->next_smb2_rcv_hdr_off)
8954 rsp = ksmbd_resp_buf_next(work);
8955
8956 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8957 sess->user && !user_guest(sess->user) &&
8958 rsp->Status == STATUS_SUCCESS)
8959 return true;
8960 return false;
8961 }
8962