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 ksmbd_conv_path_to_unix(name);
634 ksmbd_strip_last_slash(name);
635 return name;
636 }
637
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)638 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
639 {
640 struct ksmbd_conn *conn = work->conn;
641 int id;
642
643 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
644 if (id < 0) {
645 pr_err("Failed to alloc async message id\n");
646 return id;
647 }
648 work->asynchronous = true;
649 work->async_id = id;
650
651 ksmbd_debug(SMB,
652 "Send interim Response to inform async request id : %d\n",
653 work->async_id);
654
655 work->cancel_fn = fn;
656 work->cancel_argv = arg;
657
658 if (list_empty(&work->async_request_entry)) {
659 spin_lock(&conn->request_lock);
660 list_add_tail(&work->async_request_entry, &conn->async_requests);
661 spin_unlock(&conn->request_lock);
662 }
663
664 return 0;
665 }
666
release_async_work(struct ksmbd_work * work)667 void release_async_work(struct ksmbd_work *work)
668 {
669 struct ksmbd_conn *conn = work->conn;
670
671 spin_lock(&conn->request_lock);
672 list_del_init(&work->async_request_entry);
673 spin_unlock(&conn->request_lock);
674
675 work->asynchronous = 0;
676 work->cancel_fn = NULL;
677 kfree(work->cancel_argv);
678 work->cancel_argv = NULL;
679 if (work->async_id) {
680 ksmbd_release_id(&conn->async_ida, work->async_id);
681 work->async_id = 0;
682 }
683 }
684
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)685 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
686 {
687 struct smb2_hdr *rsp_hdr;
688 struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
689
690 if (allocate_interim_rsp_buf(in_work)) {
691 pr_err("smb_allocate_rsp_buf failed!\n");
692 ksmbd_free_work_struct(in_work);
693 return;
694 }
695
696 in_work->conn = work->conn;
697 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
698 __SMB2_HEADER_STRUCTURE_SIZE);
699
700 rsp_hdr = smb2_get_msg(in_work->response_buf);
701 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
702 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
703 smb2_set_err_rsp(in_work);
704 rsp_hdr->Status = status;
705
706 ksmbd_conn_write(in_work);
707 ksmbd_free_work_struct(in_work);
708 }
709
smb2_get_reparse_tag_special_file(umode_t mode)710 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
711 {
712 if (S_ISDIR(mode) || S_ISREG(mode))
713 return 0;
714
715 if (S_ISLNK(mode))
716 return IO_REPARSE_TAG_LX_SYMLINK_LE;
717 else if (S_ISFIFO(mode))
718 return IO_REPARSE_TAG_LX_FIFO_LE;
719 else if (S_ISSOCK(mode))
720 return IO_REPARSE_TAG_AF_UNIX_LE;
721 else if (S_ISCHR(mode))
722 return IO_REPARSE_TAG_LX_CHR_LE;
723 else if (S_ISBLK(mode))
724 return IO_REPARSE_TAG_LX_BLK_LE;
725
726 return 0;
727 }
728
729 /**
730 * smb2_get_dos_mode() - get file mode in dos format from unix mode
731 * @stat: kstat containing file mode
732 * @attribute: attribute flags
733 *
734 * Return: converted dos mode
735 */
smb2_get_dos_mode(struct kstat * stat,int attribute)736 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
737 {
738 int attr = 0;
739
740 if (S_ISDIR(stat->mode)) {
741 attr = FILE_ATTRIBUTE_DIRECTORY |
742 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
743 } else {
744 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
745 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
746 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
747 FILE_SUPPORTS_SPARSE_FILES))
748 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
749
750 if (smb2_get_reparse_tag_special_file(stat->mode))
751 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
752 }
753
754 return attr;
755 }
756
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)757 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
758 __le16 hash_id)
759 {
760 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
761 pneg_ctxt->DataLength = cpu_to_le16(38);
762 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
763 pneg_ctxt->Reserved = cpu_to_le32(0);
764 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
765 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
766 pneg_ctxt->HashAlgorithms = hash_id;
767 }
768
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)769 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
770 __le16 cipher_type)
771 {
772 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
773 pneg_ctxt->DataLength = cpu_to_le16(4);
774 pneg_ctxt->Reserved = cpu_to_le32(0);
775 pneg_ctxt->CipherCount = cpu_to_le16(1);
776 pneg_ctxt->Ciphers[0] = cipher_type;
777 }
778
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)779 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
780 __le16 sign_algo)
781 {
782 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
783 pneg_ctxt->DataLength =
784 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
785 - sizeof(struct smb2_neg_context));
786 pneg_ctxt->Reserved = cpu_to_le32(0);
787 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
788 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
789 }
790
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)791 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
792 {
793 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
794 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
795 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
796 pneg_ctxt->Name[0] = 0x93;
797 pneg_ctxt->Name[1] = 0xAD;
798 pneg_ctxt->Name[2] = 0x25;
799 pneg_ctxt->Name[3] = 0x50;
800 pneg_ctxt->Name[4] = 0x9C;
801 pneg_ctxt->Name[5] = 0xB4;
802 pneg_ctxt->Name[6] = 0x11;
803 pneg_ctxt->Name[7] = 0xE7;
804 pneg_ctxt->Name[8] = 0xB4;
805 pneg_ctxt->Name[9] = 0x23;
806 pneg_ctxt->Name[10] = 0x83;
807 pneg_ctxt->Name[11] = 0xDE;
808 pneg_ctxt->Name[12] = 0x96;
809 pneg_ctxt->Name[13] = 0x8B;
810 pneg_ctxt->Name[14] = 0xCD;
811 pneg_ctxt->Name[15] = 0x7C;
812 }
813
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp)814 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
815 struct smb2_negotiate_rsp *rsp)
816 {
817 char * const pneg_ctxt = (char *)rsp +
818 le32_to_cpu(rsp->NegotiateContextOffset);
819 int neg_ctxt_cnt = 1;
820 int ctxt_size;
821
822 ksmbd_debug(SMB,
823 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
824 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
825 conn->preauth_info->Preauth_HashId);
826 ctxt_size = sizeof(struct smb2_preauth_neg_context);
827
828 if (conn->cipher_type) {
829 /* Round to 8 byte boundary */
830 ctxt_size = round_up(ctxt_size, 8);
831 ksmbd_debug(SMB,
832 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
833 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
834 (pneg_ctxt + ctxt_size),
835 conn->cipher_type);
836 neg_ctxt_cnt++;
837 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
838 }
839
840 /* compression context not yet supported */
841 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
842
843 if (conn->posix_ext_supported) {
844 ctxt_size = round_up(ctxt_size, 8);
845 ksmbd_debug(SMB,
846 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
847 build_posix_ctxt((struct smb2_posix_neg_context *)
848 (pneg_ctxt + ctxt_size));
849 neg_ctxt_cnt++;
850 ctxt_size += sizeof(struct smb2_posix_neg_context);
851 }
852
853 if (conn->signing_negotiated) {
854 ctxt_size = round_up(ctxt_size, 8);
855 ksmbd_debug(SMB,
856 "assemble SMB2_SIGNING_CAPABILITIES context\n");
857 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
858 (pneg_ctxt + ctxt_size),
859 conn->signing_algorithm);
860 neg_ctxt_cnt++;
861 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
862 }
863
864 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
865 return ctxt_size + AUTH_GSS_PADDING;
866 }
867
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt,int ctxt_len)868 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
869 struct smb2_preauth_neg_context *pneg_ctxt,
870 int ctxt_len)
871 {
872 /*
873 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
874 * which may not be present. Only check for used HashAlgorithms[1].
875 */
876 if (ctxt_len <
877 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
878 return STATUS_INVALID_PARAMETER;
879
880 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
881 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
882
883 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
884 return STATUS_SUCCESS;
885 }
886
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int ctxt_len)887 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
888 struct smb2_encryption_neg_context *pneg_ctxt,
889 int ctxt_len)
890 {
891 int cph_cnt;
892 int i, cphs_size;
893
894 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
895 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
896 return;
897 }
898
899 conn->cipher_type = 0;
900
901 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
902 cphs_size = cph_cnt * sizeof(__le16);
903
904 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
905 ctxt_len) {
906 pr_err("Invalid cipher count(%d)\n", cph_cnt);
907 return;
908 }
909
910 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
911 return;
912
913 for (i = 0; i < cph_cnt; i++) {
914 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
915 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
916 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
917 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
918 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
919 pneg_ctxt->Ciphers[i]);
920 conn->cipher_type = pneg_ctxt->Ciphers[i];
921 break;
922 }
923 }
924 }
925
926 /**
927 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
928 * @conn: smb connection
929 *
930 * Return: true if connection should be encrypted, else false
931 */
smb3_encryption_negotiated(struct ksmbd_conn * conn)932 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
933 {
934 if (!conn->ops->generate_encryptionkey)
935 return false;
936
937 /*
938 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
939 * SMB 3.1.1 uses the cipher_type field.
940 */
941 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
942 conn->cipher_type;
943 }
944
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)945 static void decode_compress_ctxt(struct ksmbd_conn *conn,
946 struct smb2_compression_capabilities_context *pneg_ctxt)
947 {
948 conn->compress_algorithm = SMB3_COMPRESS_NONE;
949 }
950
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int ctxt_len)951 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
952 struct smb2_signing_capabilities *pneg_ctxt,
953 int ctxt_len)
954 {
955 int sign_algo_cnt;
956 int i, sign_alos_size;
957
958 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
959 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
960 return;
961 }
962
963 conn->signing_negotiated = false;
964 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
965 sign_alos_size = sign_algo_cnt * sizeof(__le16);
966
967 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
968 ctxt_len) {
969 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
970 return;
971 }
972
973 for (i = 0; i < sign_algo_cnt; i++) {
974 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
975 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
976 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
977 pneg_ctxt->SigningAlgorithms[i]);
978 conn->signing_negotiated = true;
979 conn->signing_algorithm =
980 pneg_ctxt->SigningAlgorithms[i];
981 break;
982 }
983 }
984 }
985
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,unsigned int len_of_smb)986 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
987 struct smb2_negotiate_req *req,
988 unsigned int len_of_smb)
989 {
990 /* +4 is to account for the RFC1001 len field */
991 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
992 int i = 0, len_of_ctxts;
993 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
994 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
995 __le32 status = STATUS_INVALID_PARAMETER;
996
997 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
998 if (len_of_smb <= offset) {
999 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1000 return status;
1001 }
1002
1003 len_of_ctxts = len_of_smb - offset;
1004
1005 while (i++ < neg_ctxt_cnt) {
1006 int clen, ctxt_len;
1007
1008 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1009 break;
1010
1011 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1012 clen = le16_to_cpu(pctx->DataLength);
1013 ctxt_len = clen + sizeof(struct smb2_neg_context);
1014
1015 if (ctxt_len > len_of_ctxts)
1016 break;
1017
1018 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1019 ksmbd_debug(SMB,
1020 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1021 if (conn->preauth_info->Preauth_HashId)
1022 break;
1023
1024 status = decode_preauth_ctxt(conn,
1025 (struct smb2_preauth_neg_context *)pctx,
1026 ctxt_len);
1027 if (status != STATUS_SUCCESS)
1028 break;
1029 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1030 ksmbd_debug(SMB,
1031 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1032 if (conn->cipher_type)
1033 break;
1034
1035 decode_encrypt_ctxt(conn,
1036 (struct smb2_encryption_neg_context *)pctx,
1037 ctxt_len);
1038 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1039 ksmbd_debug(SMB,
1040 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1041 if (conn->compress_algorithm)
1042 break;
1043
1044 decode_compress_ctxt(conn,
1045 (struct smb2_compression_capabilities_context *)pctx);
1046 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1047 ksmbd_debug(SMB,
1048 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1049 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1050 ksmbd_debug(SMB,
1051 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1052 conn->posix_ext_supported = true;
1053 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1054 ksmbd_debug(SMB,
1055 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1056
1057 decode_sign_cap_ctxt(conn,
1058 (struct smb2_signing_capabilities *)pctx,
1059 ctxt_len);
1060 }
1061
1062 /* offsets must be 8 byte aligned */
1063 offset = (ctxt_len + 7) & ~0x7;
1064 len_of_ctxts -= offset;
1065 }
1066 return status;
1067 }
1068
1069 /**
1070 * smb2_handle_negotiate() - handler for smb2 negotiate command
1071 * @work: smb work containing smb request buffer
1072 *
1073 * Return: 0
1074 */
smb2_handle_negotiate(struct ksmbd_work * work)1075 int smb2_handle_negotiate(struct ksmbd_work *work)
1076 {
1077 struct ksmbd_conn *conn = work->conn;
1078 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1079 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1080 int rc = 0;
1081 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1082 __le32 status;
1083
1084 ksmbd_debug(SMB, "Received negotiate request\n");
1085 conn->need_neg = false;
1086 if (ksmbd_conn_good(conn)) {
1087 pr_err("conn->tcp_status is already in CifsGood State\n");
1088 work->send_no_response = 1;
1089 return rc;
1090 }
1091
1092 smb2_buf_len = get_rfc1002_len(work->request_buf);
1093 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1094 if (smb2_neg_size > smb2_buf_len) {
1095 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1096 rc = -EINVAL;
1097 goto err_out;
1098 }
1099
1100 if (req->DialectCount == 0) {
1101 pr_err("malformed packet\n");
1102 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1103 rc = -EINVAL;
1104 goto err_out;
1105 }
1106
1107 if (conn->dialect == SMB311_PROT_ID) {
1108 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1109
1110 if (smb2_buf_len < nego_ctxt_off) {
1111 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1112 rc = -EINVAL;
1113 goto err_out;
1114 }
1115
1116 if (smb2_neg_size > nego_ctxt_off) {
1117 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1118 rc = -EINVAL;
1119 goto err_out;
1120 }
1121
1122 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1123 nego_ctxt_off) {
1124 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1125 rc = -EINVAL;
1126 goto err_out;
1127 }
1128 } else {
1129 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1130 smb2_buf_len) {
1131 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132 rc = -EINVAL;
1133 goto err_out;
1134 }
1135 }
1136
1137 conn->cli_cap = le32_to_cpu(req->Capabilities);
1138 switch (conn->dialect) {
1139 case SMB311_PROT_ID:
1140 conn->preauth_info =
1141 kzalloc(sizeof(struct preauth_integrity_info),
1142 GFP_KERNEL);
1143 if (!conn->preauth_info) {
1144 rc = -ENOMEM;
1145 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1146 goto err_out;
1147 }
1148
1149 status = deassemble_neg_contexts(conn, req,
1150 get_rfc1002_len(work->request_buf));
1151 if (status != STATUS_SUCCESS) {
1152 pr_err("deassemble_neg_contexts error(0x%x)\n",
1153 status);
1154 rsp->hdr.Status = status;
1155 rc = -EINVAL;
1156 kfree(conn->preauth_info);
1157 conn->preauth_info = NULL;
1158 goto err_out;
1159 }
1160
1161 rc = init_smb3_11_server(conn);
1162 if (rc < 0) {
1163 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1164 kfree(conn->preauth_info);
1165 conn->preauth_info = NULL;
1166 goto err_out;
1167 }
1168
1169 ksmbd_gen_preauth_integrity_hash(conn,
1170 work->request_buf,
1171 conn->preauth_info->Preauth_HashValue);
1172 rsp->NegotiateContextOffset =
1173 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1174 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1175 break;
1176 case SMB302_PROT_ID:
1177 init_smb3_02_server(conn);
1178 break;
1179 case SMB30_PROT_ID:
1180 init_smb3_0_server(conn);
1181 break;
1182 case SMB21_PROT_ID:
1183 init_smb2_1_server(conn);
1184 break;
1185 case SMB2X_PROT_ID:
1186 case BAD_PROT_ID:
1187 default:
1188 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1189 conn->dialect);
1190 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1191 rc = -EINVAL;
1192 goto err_out;
1193 }
1194 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1195
1196 /* For stats */
1197 conn->connection_type = conn->dialect;
1198
1199 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1200 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1201 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1202
1203 memcpy(conn->ClientGUID, req->ClientGUID,
1204 SMB2_CLIENT_GUID_SIZE);
1205 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1206
1207 rsp->StructureSize = cpu_to_le16(65);
1208 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1209 /* Not setting conn guid rsp->ServerGUID, as it
1210 * not used by client for identifying server
1211 */
1212 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1213
1214 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1215 rsp->ServerStartTime = 0;
1216 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1217 le32_to_cpu(rsp->NegotiateContextOffset),
1218 le16_to_cpu(rsp->NegotiateContextCount));
1219
1220 rsp->SecurityBufferOffset = cpu_to_le16(128);
1221 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1222 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1223 le16_to_cpu(rsp->SecurityBufferOffset));
1224
1225 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1226 conn->use_spnego = true;
1227
1228 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1229 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1230 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1231 conn->sign = true;
1232 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1233 server_conf.enforced_signing = true;
1234 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1235 conn->sign = true;
1236 }
1237
1238 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1239 ksmbd_conn_set_need_negotiate(conn);
1240
1241 err_out:
1242 if (rc)
1243 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1244
1245 if (!rc)
1246 rc = ksmbd_iov_pin_rsp(work, rsp,
1247 sizeof(struct smb2_negotiate_rsp) +
1248 AUTH_GSS_LENGTH + neg_ctxt_len);
1249 if (rc < 0)
1250 smb2_set_err_rsp(work);
1251 return rc;
1252 }
1253
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1254 static int alloc_preauth_hash(struct ksmbd_session *sess,
1255 struct ksmbd_conn *conn)
1256 {
1257 if (sess->Preauth_HashValue)
1258 return 0;
1259
1260 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1261 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1262 if (!sess->Preauth_HashValue)
1263 return -ENOMEM;
1264
1265 return 0;
1266 }
1267
generate_preauth_hash(struct ksmbd_work * work)1268 static int generate_preauth_hash(struct ksmbd_work *work)
1269 {
1270 struct ksmbd_conn *conn = work->conn;
1271 struct ksmbd_session *sess = work->sess;
1272 u8 *preauth_hash;
1273
1274 if (conn->dialect != SMB311_PROT_ID)
1275 return 0;
1276
1277 if (conn->binding) {
1278 struct preauth_session *preauth_sess;
1279
1280 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1281 if (!preauth_sess) {
1282 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1283 if (!preauth_sess)
1284 return -ENOMEM;
1285 }
1286
1287 preauth_hash = preauth_sess->Preauth_HashValue;
1288 } else {
1289 if (!sess->Preauth_HashValue)
1290 if (alloc_preauth_hash(sess, conn))
1291 return -ENOMEM;
1292 preauth_hash = sess->Preauth_HashValue;
1293 }
1294
1295 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1296 return 0;
1297 }
1298
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1299 static int decode_negotiation_token(struct ksmbd_conn *conn,
1300 struct negotiate_message *negblob,
1301 size_t sz)
1302 {
1303 if (!conn->use_spnego)
1304 return -EINVAL;
1305
1306 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1307 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1308 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1309 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1310 conn->use_spnego = false;
1311 }
1312 }
1313 return 0;
1314 }
1315
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len,struct smb2_sess_setup_rsp * rsp)1316 static int ntlm_negotiate(struct ksmbd_work *work,
1317 struct negotiate_message *negblob,
1318 size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1319 {
1320 struct challenge_message *chgblob;
1321 unsigned char *spnego_blob = NULL;
1322 u16 spnego_blob_len;
1323 char *neg_blob;
1324 int sz, rc;
1325
1326 ksmbd_debug(SMB, "negotiate phase\n");
1327 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1328 if (rc)
1329 return rc;
1330
1331 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1332 chgblob =
1333 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1334 memset(chgblob, 0, sizeof(struct challenge_message));
1335
1336 if (!work->conn->use_spnego) {
1337 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1338 if (sz < 0)
1339 return -ENOMEM;
1340
1341 rsp->SecurityBufferLength = cpu_to_le16(sz);
1342 return 0;
1343 }
1344
1345 sz = sizeof(struct challenge_message);
1346 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1347
1348 neg_blob = kzalloc(sz, GFP_KERNEL);
1349 if (!neg_blob)
1350 return -ENOMEM;
1351
1352 chgblob = (struct challenge_message *)neg_blob;
1353 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1354 if (sz < 0) {
1355 rc = -ENOMEM;
1356 goto out;
1357 }
1358
1359 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1360 neg_blob, sz);
1361 if (rc) {
1362 rc = -ENOMEM;
1363 goto out;
1364 }
1365
1366 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1367 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1368 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1369
1370 out:
1371 kfree(spnego_blob);
1372 kfree(neg_blob);
1373 return rc;
1374 }
1375
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1376 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1377 struct smb2_sess_setup_req *req)
1378 {
1379 int sz;
1380
1381 if (conn->use_spnego && conn->mechToken)
1382 return (struct authenticate_message *)conn->mechToken;
1383
1384 sz = le16_to_cpu(req->SecurityBufferOffset);
1385 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1386 + sz);
1387 }
1388
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1389 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1390 struct smb2_sess_setup_req *req)
1391 {
1392 struct authenticate_message *authblob;
1393 struct ksmbd_user *user;
1394 char *name;
1395 unsigned int name_off, name_len, secbuf_len;
1396
1397 if (conn->use_spnego && conn->mechToken)
1398 secbuf_len = conn->mechTokenLen;
1399 else
1400 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1401 if (secbuf_len < sizeof(struct authenticate_message)) {
1402 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1403 return NULL;
1404 }
1405 authblob = user_authblob(conn, req);
1406 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1407 name_len = le16_to_cpu(authblob->UserName.Length);
1408
1409 if (secbuf_len < (u64)name_off + name_len)
1410 return NULL;
1411
1412 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1413 name_len,
1414 true,
1415 conn->local_nls);
1416 if (IS_ERR(name)) {
1417 pr_err("cannot allocate memory\n");
1418 return NULL;
1419 }
1420
1421 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1422 user = ksmbd_login_user(name);
1423 kfree(name);
1424 return user;
1425 }
1426
ntlm_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1427 static int ntlm_authenticate(struct ksmbd_work *work,
1428 struct smb2_sess_setup_req *req,
1429 struct smb2_sess_setup_rsp *rsp)
1430 {
1431 struct ksmbd_conn *conn = work->conn;
1432 struct ksmbd_session *sess = work->sess;
1433 struct channel *chann = NULL;
1434 struct ksmbd_user *user;
1435 u64 prev_id;
1436 int sz, rc;
1437
1438 ksmbd_debug(SMB, "authenticate phase\n");
1439 if (conn->use_spnego) {
1440 unsigned char *spnego_blob;
1441 u16 spnego_blob_len;
1442
1443 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1444 &spnego_blob_len,
1445 0);
1446 if (rc)
1447 return -ENOMEM;
1448
1449 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1450 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1451 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1452 kfree(spnego_blob);
1453 }
1454
1455 user = session_user(conn, req);
1456 if (!user) {
1457 ksmbd_debug(SMB, "Unknown user name or an error\n");
1458 return -EPERM;
1459 }
1460
1461 /* Check for previous session */
1462 prev_id = le64_to_cpu(req->PreviousSessionId);
1463 if (prev_id && prev_id != sess->id)
1464 destroy_previous_session(conn, user, prev_id);
1465
1466 if (sess->state == SMB2_SESSION_VALID) {
1467 /*
1468 * Reuse session if anonymous try to connect
1469 * on reauthetication.
1470 */
1471 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1472 ksmbd_free_user(user);
1473 return 0;
1474 }
1475
1476 if (!ksmbd_compare_user(sess->user, user)) {
1477 ksmbd_free_user(user);
1478 return -EPERM;
1479 }
1480 ksmbd_free_user(user);
1481 } else {
1482 sess->user = user;
1483 }
1484
1485 if (conn->binding == false && user_guest(sess->user)) {
1486 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1487 } else {
1488 struct authenticate_message *authblob;
1489
1490 authblob = user_authblob(conn, req);
1491 if (conn->use_spnego && conn->mechToken)
1492 sz = conn->mechTokenLen;
1493 else
1494 sz = le16_to_cpu(req->SecurityBufferLength);
1495 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1496 if (rc) {
1497 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1498 ksmbd_debug(SMB, "authentication failed\n");
1499 return -EPERM;
1500 }
1501 }
1502
1503 /*
1504 * If session state is SMB2_SESSION_VALID, We can assume
1505 * that it is reauthentication. And the user/password
1506 * has been verified, so return it here.
1507 */
1508 if (sess->state == SMB2_SESSION_VALID) {
1509 if (conn->binding)
1510 goto binding_session;
1511 return 0;
1512 }
1513
1514 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1515 (conn->sign || server_conf.enforced_signing)) ||
1516 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1517 sess->sign = true;
1518
1519 if (smb3_encryption_negotiated(conn) &&
1520 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1521 rc = conn->ops->generate_encryptionkey(conn, sess);
1522 if (rc) {
1523 ksmbd_debug(SMB,
1524 "SMB3 encryption key generation failed\n");
1525 return -EINVAL;
1526 }
1527 sess->enc = true;
1528 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1529 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1530 /*
1531 * signing is disable if encryption is enable
1532 * on this session
1533 */
1534 sess->sign = false;
1535 }
1536
1537 binding_session:
1538 if (conn->dialect >= SMB30_PROT_ID) {
1539 chann = lookup_chann_list(sess, conn);
1540 if (!chann) {
1541 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1542 if (!chann)
1543 return -ENOMEM;
1544
1545 chann->conn = conn;
1546 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1547 }
1548 }
1549
1550 if (conn->ops->generate_signingkey) {
1551 rc = conn->ops->generate_signingkey(sess, conn);
1552 if (rc) {
1553 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1554 return -EINVAL;
1555 }
1556 }
1557
1558 if (!ksmbd_conn_lookup_dialect(conn)) {
1559 pr_err("fail to verify the dialect\n");
1560 return -ENOENT;
1561 }
1562 return 0;
1563 }
1564
1565 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1566 static int krb5_authenticate(struct ksmbd_work *work,
1567 struct smb2_sess_setup_req *req,
1568 struct smb2_sess_setup_rsp *rsp)
1569 {
1570 struct ksmbd_conn *conn = work->conn;
1571 struct ksmbd_session *sess = work->sess;
1572 char *in_blob, *out_blob;
1573 struct channel *chann = NULL;
1574 u64 prev_sess_id;
1575 int in_len, out_len;
1576 int retval;
1577
1578 in_blob = (char *)&req->hdr.ProtocolId +
1579 le16_to_cpu(req->SecurityBufferOffset);
1580 in_len = le16_to_cpu(req->SecurityBufferLength);
1581 out_blob = (char *)&rsp->hdr.ProtocolId +
1582 le16_to_cpu(rsp->SecurityBufferOffset);
1583 out_len = work->response_sz -
1584 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1585
1586 /* Check previous session */
1587 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1588 if (prev_sess_id && prev_sess_id != sess->id)
1589 destroy_previous_session(conn, sess->user, prev_sess_id);
1590
1591 if (sess->state == SMB2_SESSION_VALID)
1592 ksmbd_free_user(sess->user);
1593
1594 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1595 out_blob, &out_len);
1596 if (retval) {
1597 ksmbd_debug(SMB, "krb5 authentication failed\n");
1598 return -EINVAL;
1599 }
1600 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1601
1602 if ((conn->sign || server_conf.enforced_signing) ||
1603 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1604 sess->sign = true;
1605
1606 if (smb3_encryption_negotiated(conn)) {
1607 retval = conn->ops->generate_encryptionkey(conn, sess);
1608 if (retval) {
1609 ksmbd_debug(SMB,
1610 "SMB3 encryption key generation failed\n");
1611 return -EINVAL;
1612 }
1613 sess->enc = true;
1614 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1615 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1616 sess->sign = false;
1617 }
1618
1619 if (conn->dialect >= SMB30_PROT_ID) {
1620 chann = lookup_chann_list(sess, conn);
1621 if (!chann) {
1622 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1623 if (!chann)
1624 return -ENOMEM;
1625
1626 chann->conn = conn;
1627 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1628 }
1629 }
1630
1631 if (conn->ops->generate_signingkey) {
1632 retval = conn->ops->generate_signingkey(sess, conn);
1633 if (retval) {
1634 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1635 return -EINVAL;
1636 }
1637 }
1638
1639 if (!ksmbd_conn_lookup_dialect(conn)) {
1640 pr_err("fail to verify the dialect\n");
1641 return -ENOENT;
1642 }
1643 return 0;
1644 }
1645 #else
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1646 static int krb5_authenticate(struct ksmbd_work *work,
1647 struct smb2_sess_setup_req *req,
1648 struct smb2_sess_setup_rsp *rsp)
1649 {
1650 return -EOPNOTSUPP;
1651 }
1652 #endif
1653
smb2_sess_setup(struct ksmbd_work * work)1654 int smb2_sess_setup(struct ksmbd_work *work)
1655 {
1656 struct ksmbd_conn *conn = work->conn;
1657 struct smb2_sess_setup_req *req;
1658 struct smb2_sess_setup_rsp *rsp;
1659 struct ksmbd_session *sess;
1660 struct negotiate_message *negblob;
1661 unsigned int negblob_len, negblob_off;
1662 int rc = 0;
1663
1664 ksmbd_debug(SMB, "Received request for session setup\n");
1665
1666 WORK_BUFFERS(work, req, rsp);
1667
1668 rsp->StructureSize = cpu_to_le16(9);
1669 rsp->SessionFlags = 0;
1670 rsp->SecurityBufferOffset = cpu_to_le16(72);
1671 rsp->SecurityBufferLength = 0;
1672
1673 ksmbd_conn_lock(conn);
1674 if (!req->hdr.SessionId) {
1675 sess = ksmbd_smb2_session_create();
1676 if (!sess) {
1677 rc = -ENOMEM;
1678 goto out_err;
1679 }
1680 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1681 rc = ksmbd_session_register(conn, sess);
1682 if (rc)
1683 goto out_err;
1684 } else if (conn->dialect >= SMB30_PROT_ID &&
1685 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1686 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1687 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1688
1689 sess = ksmbd_session_lookup_slowpath(sess_id);
1690 if (!sess) {
1691 rc = -ENOENT;
1692 goto out_err;
1693 }
1694
1695 if (conn->dialect != sess->dialect) {
1696 rc = -EINVAL;
1697 goto out_err;
1698 }
1699
1700 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1701 rc = -EINVAL;
1702 goto out_err;
1703 }
1704
1705 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1706 SMB2_CLIENT_GUID_SIZE)) {
1707 rc = -ENOENT;
1708 goto out_err;
1709 }
1710
1711 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1712 rc = -EACCES;
1713 goto out_err;
1714 }
1715
1716 if (sess->state == SMB2_SESSION_EXPIRED) {
1717 rc = -EFAULT;
1718 goto out_err;
1719 }
1720
1721 if (ksmbd_conn_need_reconnect(conn)) {
1722 rc = -EFAULT;
1723 sess = NULL;
1724 goto out_err;
1725 }
1726
1727 if (ksmbd_session_lookup(conn, sess_id)) {
1728 rc = -EACCES;
1729 goto out_err;
1730 }
1731
1732 if (user_guest(sess->user)) {
1733 rc = -EOPNOTSUPP;
1734 goto out_err;
1735 }
1736
1737 conn->binding = true;
1738 } else if ((conn->dialect < SMB30_PROT_ID ||
1739 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1740 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1741 sess = NULL;
1742 rc = -EACCES;
1743 goto out_err;
1744 } else {
1745 sess = ksmbd_session_lookup(conn,
1746 le64_to_cpu(req->hdr.SessionId));
1747 if (!sess) {
1748 rc = -ENOENT;
1749 goto out_err;
1750 }
1751
1752 if (sess->state == SMB2_SESSION_EXPIRED) {
1753 rc = -EFAULT;
1754 goto out_err;
1755 }
1756
1757 if (ksmbd_conn_need_reconnect(conn)) {
1758 rc = -EFAULT;
1759 sess = NULL;
1760 goto out_err;
1761 }
1762 }
1763 work->sess = sess;
1764
1765 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1766 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1767 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1768 rc = -EINVAL;
1769 goto out_err;
1770 }
1771
1772 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1773 negblob_off);
1774
1775 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1776 if (conn->mechToken) {
1777 negblob = (struct negotiate_message *)conn->mechToken;
1778 negblob_len = conn->mechTokenLen;
1779 }
1780 }
1781
1782 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1783 rc = -EINVAL;
1784 goto out_err;
1785 }
1786
1787 if (server_conf.auth_mechs & conn->auth_mechs) {
1788 rc = generate_preauth_hash(work);
1789 if (rc)
1790 goto out_err;
1791
1792 if (conn->preferred_auth_mech &
1793 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1794 rc = krb5_authenticate(work, req, rsp);
1795 if (rc) {
1796 rc = -EINVAL;
1797 goto out_err;
1798 }
1799
1800 if (!ksmbd_conn_need_reconnect(conn)) {
1801 ksmbd_conn_set_good(conn);
1802 sess->state = SMB2_SESSION_VALID;
1803 }
1804 kfree(sess->Preauth_HashValue);
1805 sess->Preauth_HashValue = NULL;
1806 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1807 if (negblob->MessageType == NtLmNegotiate) {
1808 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1809 if (rc)
1810 goto out_err;
1811 rsp->hdr.Status =
1812 STATUS_MORE_PROCESSING_REQUIRED;
1813 } else if (negblob->MessageType == NtLmAuthenticate) {
1814 rc = ntlm_authenticate(work, req, rsp);
1815 if (rc)
1816 goto out_err;
1817
1818 if (!ksmbd_conn_need_reconnect(conn)) {
1819 ksmbd_conn_set_good(conn);
1820 sess->state = SMB2_SESSION_VALID;
1821 }
1822 if (conn->binding) {
1823 struct preauth_session *preauth_sess;
1824
1825 preauth_sess =
1826 ksmbd_preauth_session_lookup(conn, sess->id);
1827 if (preauth_sess) {
1828 list_del(&preauth_sess->preauth_entry);
1829 kfree(preauth_sess);
1830 }
1831 }
1832 kfree(sess->Preauth_HashValue);
1833 sess->Preauth_HashValue = NULL;
1834 } else {
1835 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1836 le32_to_cpu(negblob->MessageType));
1837 rc = -EINVAL;
1838 }
1839 } else {
1840 /* TODO: need one more negotiation */
1841 pr_err("Not support the preferred authentication\n");
1842 rc = -EINVAL;
1843 }
1844 } else {
1845 pr_err("Not support authentication\n");
1846 rc = -EINVAL;
1847 }
1848
1849 out_err:
1850 if (rc == -EINVAL)
1851 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1852 else if (rc == -ENOENT)
1853 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1854 else if (rc == -EACCES)
1855 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1856 else if (rc == -EFAULT)
1857 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1858 else if (rc == -ENOMEM)
1859 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1860 else if (rc == -EOPNOTSUPP)
1861 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1862 else if (rc)
1863 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1864
1865 if (conn->use_spnego && conn->mechToken) {
1866 kfree(conn->mechToken);
1867 conn->mechToken = NULL;
1868 }
1869
1870 if (rc < 0) {
1871 /*
1872 * SecurityBufferOffset should be set to zero
1873 * in session setup error response.
1874 */
1875 rsp->SecurityBufferOffset = 0;
1876
1877 if (sess) {
1878 bool try_delay = false;
1879
1880 /*
1881 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1882 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1883 * failure to make it harder to send enough random connection requests
1884 * to break into a server.
1885 */
1886 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1887 try_delay = true;
1888
1889 sess->last_active = jiffies;
1890 sess->state = SMB2_SESSION_EXPIRED;
1891 if (try_delay) {
1892 ksmbd_conn_set_need_reconnect(conn);
1893 ssleep(5);
1894 ksmbd_conn_set_need_negotiate(conn);
1895 }
1896 }
1897 smb2_set_err_rsp(work);
1898 } else {
1899 unsigned int iov_len;
1900
1901 if (rsp->SecurityBufferLength)
1902 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1903 le16_to_cpu(rsp->SecurityBufferLength);
1904 else
1905 iov_len = sizeof(struct smb2_sess_setup_rsp);
1906 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1907 if (rc)
1908 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1909 }
1910
1911 ksmbd_conn_unlock(conn);
1912 return rc;
1913 }
1914
1915 /**
1916 * smb2_tree_connect() - handler for smb2 tree connect command
1917 * @work: smb work containing smb request buffer
1918 *
1919 * Return: 0 on success, otherwise error
1920 */
smb2_tree_connect(struct ksmbd_work * work)1921 int smb2_tree_connect(struct ksmbd_work *work)
1922 {
1923 struct ksmbd_conn *conn = work->conn;
1924 struct smb2_tree_connect_req *req;
1925 struct smb2_tree_connect_rsp *rsp;
1926 struct ksmbd_session *sess = work->sess;
1927 char *treename = NULL, *name = NULL;
1928 struct ksmbd_tree_conn_status status;
1929 struct ksmbd_share_config *share;
1930 int rc = -EINVAL;
1931
1932 WORK_BUFFERS(work, req, rsp);
1933
1934 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1935 le16_to_cpu(req->PathLength), true,
1936 conn->local_nls);
1937 if (IS_ERR(treename)) {
1938 pr_err("treename is NULL\n");
1939 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1940 goto out_err1;
1941 }
1942
1943 name = ksmbd_extract_sharename(conn->um, treename);
1944 if (IS_ERR(name)) {
1945 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1946 goto out_err1;
1947 }
1948
1949 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1950 name, treename);
1951
1952 status = ksmbd_tree_conn_connect(conn, sess, name);
1953 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1954 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1955 else
1956 goto out_err1;
1957
1958 share = status.tree_conn->share_conf;
1959 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1960 ksmbd_debug(SMB, "IPC share path request\n");
1961 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1962 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1963 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1964 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1965 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1966 FILE_SYNCHRONIZE_LE;
1967 } else {
1968 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1969 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1970 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1971 if (test_tree_conn_flag(status.tree_conn,
1972 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1973 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1974 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1975 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1976 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1977 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1978 FILE_SYNCHRONIZE_LE;
1979 }
1980 }
1981
1982 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1983 if (conn->posix_ext_supported)
1984 status.tree_conn->posix_extensions = true;
1985
1986 write_lock(&sess->tree_conns_lock);
1987 status.tree_conn->t_state = TREE_CONNECTED;
1988 write_unlock(&sess->tree_conns_lock);
1989 rsp->StructureSize = cpu_to_le16(16);
1990 out_err1:
1991 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
1992 test_share_config_flag(share,
1993 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
1994 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
1995 else
1996 rsp->Capabilities = 0;
1997 rsp->Reserved = 0;
1998 /* default manual caching */
1999 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2000
2001 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2002 if (rc)
2003 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2004
2005 if (!IS_ERR(treename))
2006 kfree(treename);
2007 if (!IS_ERR(name))
2008 kfree(name);
2009
2010 switch (status.ret) {
2011 case KSMBD_TREE_CONN_STATUS_OK:
2012 rsp->hdr.Status = STATUS_SUCCESS;
2013 rc = 0;
2014 break;
2015 case -ESTALE:
2016 case -ENOENT:
2017 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2018 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2019 break;
2020 case -ENOMEM:
2021 case KSMBD_TREE_CONN_STATUS_NOMEM:
2022 rsp->hdr.Status = STATUS_NO_MEMORY;
2023 break;
2024 case KSMBD_TREE_CONN_STATUS_ERROR:
2025 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2026 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2027 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2028 break;
2029 case -EINVAL:
2030 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2031 break;
2032 default:
2033 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2034 }
2035
2036 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2037 smb2_set_err_rsp(work);
2038
2039 return rc;
2040 }
2041
2042 /**
2043 * smb2_create_open_flags() - convert smb open flags to unix open flags
2044 * @file_present: is file already present
2045 * @access: file access flags
2046 * @disposition: file disposition flags
2047 * @may_flags: set with MAY_ flags
2048 *
2049 * Return: file open flags
2050 */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags)2051 static int smb2_create_open_flags(bool file_present, __le32 access,
2052 __le32 disposition,
2053 int *may_flags)
2054 {
2055 int oflags = O_NONBLOCK | O_LARGEFILE;
2056
2057 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2058 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2059 oflags |= O_RDWR;
2060 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2061 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2062 oflags |= O_WRONLY;
2063 *may_flags = MAY_OPEN | MAY_WRITE;
2064 } else {
2065 oflags |= O_RDONLY;
2066 *may_flags = MAY_OPEN | MAY_READ;
2067 }
2068
2069 if (access == FILE_READ_ATTRIBUTES_LE)
2070 oflags |= O_PATH;
2071
2072 if (file_present) {
2073 switch (disposition & FILE_CREATE_MASK_LE) {
2074 case FILE_OPEN_LE:
2075 case FILE_CREATE_LE:
2076 break;
2077 case FILE_SUPERSEDE_LE:
2078 case FILE_OVERWRITE_LE:
2079 case FILE_OVERWRITE_IF_LE:
2080 oflags |= O_TRUNC;
2081 break;
2082 default:
2083 break;
2084 }
2085 } else {
2086 switch (disposition & FILE_CREATE_MASK_LE) {
2087 case FILE_SUPERSEDE_LE:
2088 case FILE_CREATE_LE:
2089 case FILE_OPEN_IF_LE:
2090 case FILE_OVERWRITE_IF_LE:
2091 oflags |= O_CREAT;
2092 break;
2093 case FILE_OPEN_LE:
2094 case FILE_OVERWRITE_LE:
2095 oflags &= ~O_CREAT;
2096 break;
2097 default:
2098 break;
2099 }
2100 }
2101
2102 return oflags;
2103 }
2104
2105 /**
2106 * smb2_tree_disconnect() - handler for smb tree connect request
2107 * @work: smb work containing request buffer
2108 *
2109 * Return: 0
2110 */
smb2_tree_disconnect(struct ksmbd_work * work)2111 int smb2_tree_disconnect(struct ksmbd_work *work)
2112 {
2113 struct smb2_tree_disconnect_rsp *rsp;
2114 struct smb2_tree_disconnect_req *req;
2115 struct ksmbd_session *sess = work->sess;
2116 struct ksmbd_tree_connect *tcon = work->tcon;
2117 int err;
2118
2119 WORK_BUFFERS(work, req, rsp);
2120
2121 ksmbd_debug(SMB, "request\n");
2122
2123 if (!tcon) {
2124 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2125
2126 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2127 err = -ENOENT;
2128 goto err_out;
2129 }
2130
2131 ksmbd_close_tree_conn_fds(work);
2132
2133 write_lock(&sess->tree_conns_lock);
2134 if (tcon->t_state == TREE_DISCONNECTED) {
2135 write_unlock(&sess->tree_conns_lock);
2136 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2137 err = -ENOENT;
2138 goto err_out;
2139 }
2140
2141 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2142 tcon->t_state = TREE_DISCONNECTED;
2143 write_unlock(&sess->tree_conns_lock);
2144
2145 err = ksmbd_tree_conn_disconnect(sess, tcon);
2146 if (err) {
2147 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2148 goto err_out;
2149 }
2150
2151 work->tcon = NULL;
2152
2153 rsp->StructureSize = cpu_to_le16(4);
2154 err = ksmbd_iov_pin_rsp(work, rsp,
2155 sizeof(struct smb2_tree_disconnect_rsp));
2156 if (err) {
2157 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2158 goto err_out;
2159 }
2160
2161 return 0;
2162
2163 err_out:
2164 smb2_set_err_rsp(work);
2165 return err;
2166
2167 }
2168
2169 /**
2170 * smb2_session_logoff() - handler for session log off request
2171 * @work: smb work containing request buffer
2172 *
2173 * Return: 0
2174 */
smb2_session_logoff(struct ksmbd_work * work)2175 int smb2_session_logoff(struct ksmbd_work *work)
2176 {
2177 struct ksmbd_conn *conn = work->conn;
2178 struct smb2_logoff_req *req;
2179 struct smb2_logoff_rsp *rsp;
2180 struct ksmbd_session *sess;
2181 u64 sess_id;
2182 int err;
2183
2184 WORK_BUFFERS(work, req, rsp);
2185
2186 ksmbd_debug(SMB, "request\n");
2187
2188 ksmbd_conn_lock(conn);
2189 if (!ksmbd_conn_good(conn)) {
2190 ksmbd_conn_unlock(conn);
2191 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2192 smb2_set_err_rsp(work);
2193 return -ENOENT;
2194 }
2195 sess_id = le64_to_cpu(req->hdr.SessionId);
2196 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2197 ksmbd_conn_unlock(conn);
2198
2199 ksmbd_close_session_fds(work);
2200 ksmbd_conn_wait_idle(conn, sess_id);
2201
2202 /*
2203 * Re-lookup session to validate if session is deleted
2204 * while waiting request complete
2205 */
2206 sess = ksmbd_session_lookup_all(conn, sess_id);
2207 if (ksmbd_tree_conn_session_logoff(sess)) {
2208 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2209 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2210 smb2_set_err_rsp(work);
2211 return -ENOENT;
2212 }
2213
2214 ksmbd_destroy_file_table(&sess->file_table);
2215 sess->state = SMB2_SESSION_EXPIRED;
2216
2217 ksmbd_free_user(sess->user);
2218 sess->user = NULL;
2219 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2220
2221 rsp->StructureSize = cpu_to_le16(4);
2222 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2223 if (err) {
2224 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2225 smb2_set_err_rsp(work);
2226 return err;
2227 }
2228 return 0;
2229 }
2230
2231 /**
2232 * create_smb2_pipe() - create IPC pipe
2233 * @work: smb work containing request buffer
2234 *
2235 * Return: 0 on success, otherwise error
2236 */
create_smb2_pipe(struct ksmbd_work * work)2237 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2238 {
2239 struct smb2_create_rsp *rsp;
2240 struct smb2_create_req *req;
2241 int id;
2242 int err;
2243 char *name;
2244
2245 WORK_BUFFERS(work, req, rsp);
2246
2247 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2248 1, work->conn->local_nls);
2249 if (IS_ERR(name)) {
2250 rsp->hdr.Status = STATUS_NO_MEMORY;
2251 err = PTR_ERR(name);
2252 goto out;
2253 }
2254
2255 id = ksmbd_session_rpc_open(work->sess, name);
2256 if (id < 0) {
2257 pr_err("Unable to open RPC pipe: %d\n", id);
2258 err = id;
2259 goto out;
2260 }
2261
2262 rsp->hdr.Status = STATUS_SUCCESS;
2263 rsp->StructureSize = cpu_to_le16(89);
2264 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2265 rsp->Flags = 0;
2266 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2267
2268 rsp->CreationTime = cpu_to_le64(0);
2269 rsp->LastAccessTime = cpu_to_le64(0);
2270 rsp->ChangeTime = cpu_to_le64(0);
2271 rsp->AllocationSize = cpu_to_le64(0);
2272 rsp->EndofFile = cpu_to_le64(0);
2273 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2274 rsp->Reserved2 = 0;
2275 rsp->VolatileFileId = id;
2276 rsp->PersistentFileId = 0;
2277 rsp->CreateContextsOffset = 0;
2278 rsp->CreateContextsLength = 0;
2279
2280 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2281 if (err)
2282 goto out;
2283
2284 kfree(name);
2285 return 0;
2286
2287 out:
2288 switch (err) {
2289 case -EINVAL:
2290 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2291 break;
2292 case -ENOSPC:
2293 case -ENOMEM:
2294 rsp->hdr.Status = STATUS_NO_MEMORY;
2295 break;
2296 }
2297
2298 if (!IS_ERR(name))
2299 kfree(name);
2300
2301 smb2_set_err_rsp(work);
2302 return err;
2303 }
2304
2305 /**
2306 * smb2_set_ea() - handler for setting extended attributes using set
2307 * info command
2308 * @eabuf: set info command buffer
2309 * @buf_len: set info command buffer length
2310 * @path: dentry path for get ea
2311 * @get_write: get write access to a mount
2312 *
2313 * Return: 0 on success, otherwise error
2314 */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2315 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2316 const struct path *path, bool get_write)
2317 {
2318 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2319 char *attr_name = NULL, *value;
2320 int rc = 0;
2321 unsigned int next = 0;
2322
2323 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2324 le16_to_cpu(eabuf->EaValueLength))
2325 return -EINVAL;
2326
2327 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2328 if (!attr_name)
2329 return -ENOMEM;
2330
2331 do {
2332 if (!eabuf->EaNameLength)
2333 goto next;
2334
2335 ksmbd_debug(SMB,
2336 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2337 eabuf->name, eabuf->EaNameLength,
2338 le16_to_cpu(eabuf->EaValueLength),
2339 le32_to_cpu(eabuf->NextEntryOffset));
2340
2341 if (eabuf->EaNameLength >
2342 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2343 rc = -EINVAL;
2344 break;
2345 }
2346
2347 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2348 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2349 eabuf->EaNameLength);
2350 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2351 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2352
2353 if (!eabuf->EaValueLength) {
2354 rc = ksmbd_vfs_casexattr_len(idmap,
2355 path->dentry,
2356 attr_name,
2357 XATTR_USER_PREFIX_LEN +
2358 eabuf->EaNameLength);
2359
2360 /* delete the EA only when it exits */
2361 if (rc > 0) {
2362 rc = ksmbd_vfs_remove_xattr(idmap,
2363 path,
2364 attr_name);
2365
2366 if (rc < 0) {
2367 ksmbd_debug(SMB,
2368 "remove xattr failed(%d)\n",
2369 rc);
2370 break;
2371 }
2372 }
2373
2374 /* if the EA doesn't exist, just do nothing. */
2375 rc = 0;
2376 } else {
2377 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2378 le16_to_cpu(eabuf->EaValueLength),
2379 0, true);
2380 if (rc < 0) {
2381 ksmbd_debug(SMB,
2382 "ksmbd_vfs_setxattr is failed(%d)\n",
2383 rc);
2384 break;
2385 }
2386 }
2387
2388 next:
2389 next = le32_to_cpu(eabuf->NextEntryOffset);
2390 if (next == 0 || buf_len < next)
2391 break;
2392 buf_len -= next;
2393 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2394 if (buf_len < sizeof(struct smb2_ea_info)) {
2395 rc = -EINVAL;
2396 break;
2397 }
2398
2399 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2400 le16_to_cpu(eabuf->EaValueLength)) {
2401 rc = -EINVAL;
2402 break;
2403 }
2404 } while (next != 0);
2405
2406 kfree(attr_name);
2407 return rc;
2408 }
2409
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2410 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2411 struct ksmbd_file *fp,
2412 char *stream_name, int s_type)
2413 {
2414 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2415 size_t xattr_stream_size;
2416 char *xattr_stream_name;
2417 int rc;
2418
2419 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2420 &xattr_stream_name,
2421 &xattr_stream_size,
2422 s_type);
2423 if (rc)
2424 return rc;
2425
2426 fp->stream.name = xattr_stream_name;
2427 fp->stream.size = xattr_stream_size;
2428
2429 /* Check if there is stream prefix in xattr space */
2430 rc = ksmbd_vfs_casexattr_len(idmap,
2431 path->dentry,
2432 xattr_stream_name,
2433 xattr_stream_size);
2434 if (rc >= 0)
2435 return 0;
2436
2437 if (fp->cdoption == FILE_OPEN_LE) {
2438 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2439 return -EBADF;
2440 }
2441
2442 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2443 if (rc < 0)
2444 pr_err("Failed to store XATTR stream name :%d\n", rc);
2445 return 0;
2446 }
2447
smb2_remove_smb_xattrs(const struct path * path)2448 static int smb2_remove_smb_xattrs(const struct path *path)
2449 {
2450 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2451 char *name, *xattr_list = NULL;
2452 ssize_t xattr_list_len;
2453 int err = 0;
2454
2455 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2456 if (xattr_list_len < 0) {
2457 goto out;
2458 } else if (!xattr_list_len) {
2459 ksmbd_debug(SMB, "empty xattr in the file\n");
2460 goto out;
2461 }
2462
2463 for (name = xattr_list; name - xattr_list < xattr_list_len;
2464 name += strlen(name) + 1) {
2465 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2466
2467 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2468 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2469 STREAM_PREFIX_LEN)) {
2470 err = ksmbd_vfs_remove_xattr(idmap, path,
2471 name);
2472 if (err)
2473 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2474 name);
2475 }
2476 }
2477 out:
2478 kvfree(xattr_list);
2479 return err;
2480 }
2481
smb2_create_truncate(const struct path * path)2482 static int smb2_create_truncate(const struct path *path)
2483 {
2484 int rc = vfs_truncate(path, 0);
2485
2486 if (rc) {
2487 pr_err("vfs_truncate failed, rc %d\n", rc);
2488 return rc;
2489 }
2490
2491 rc = smb2_remove_smb_xattrs(path);
2492 if (rc == -EOPNOTSUPP)
2493 rc = 0;
2494 if (rc)
2495 ksmbd_debug(SMB,
2496 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2497 rc);
2498 return rc;
2499 }
2500
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2501 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2502 struct ksmbd_file *fp)
2503 {
2504 struct xattr_dos_attrib da = {0};
2505 int rc;
2506
2507 if (!test_share_config_flag(tcon->share_conf,
2508 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2509 return;
2510
2511 da.version = 4;
2512 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2513 da.itime = da.create_time = fp->create_time;
2514 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2515 XATTR_DOSINFO_ITIME;
2516
2517 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2518 if (rc)
2519 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2520 }
2521
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2522 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2523 const struct path *path, struct ksmbd_file *fp)
2524 {
2525 struct xattr_dos_attrib da;
2526 int rc;
2527
2528 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2529
2530 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2531 if (!test_share_config_flag(tcon->share_conf,
2532 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2533 return;
2534
2535 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2536 path->dentry, &da);
2537 if (rc > 0) {
2538 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2539 fp->create_time = da.create_time;
2540 fp->itime = da.itime;
2541 }
2542 }
2543
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)2544 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2545 struct path *path, char *name, int open_flags,
2546 umode_t posix_mode, bool is_dir)
2547 {
2548 struct ksmbd_tree_connect *tcon = work->tcon;
2549 struct ksmbd_share_config *share = tcon->share_conf;
2550 umode_t mode;
2551 int rc;
2552
2553 if (!(open_flags & O_CREAT))
2554 return -EBADF;
2555
2556 ksmbd_debug(SMB, "file does not exist, so creating\n");
2557 if (is_dir == true) {
2558 ksmbd_debug(SMB, "creating directory\n");
2559
2560 mode = share_config_directory_mode(share, posix_mode);
2561 rc = ksmbd_vfs_mkdir(work, name, mode);
2562 if (rc)
2563 return rc;
2564 } else {
2565 ksmbd_debug(SMB, "creating regular file\n");
2566
2567 mode = share_config_create_mode(share, posix_mode);
2568 rc = ksmbd_vfs_create(work, name, mode);
2569 if (rc)
2570 return rc;
2571 }
2572
2573 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2574 if (rc) {
2575 pr_err("cannot get linux path (%s), err = %d\n",
2576 name, rc);
2577 return rc;
2578 }
2579 return 0;
2580 }
2581
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2582 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2583 struct smb2_create_req *req,
2584 const struct path *path)
2585 {
2586 struct create_context *context;
2587 struct create_sd_buf_req *sd_buf;
2588
2589 if (!req->CreateContextsOffset)
2590 return -ENOENT;
2591
2592 /* Parse SD BUFFER create contexts */
2593 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2594 if (!context)
2595 return -ENOENT;
2596 else if (IS_ERR(context))
2597 return PTR_ERR(context);
2598
2599 ksmbd_debug(SMB,
2600 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2601 sd_buf = (struct create_sd_buf_req *)context;
2602 if (le16_to_cpu(context->DataOffset) +
2603 le32_to_cpu(context->DataLength) <
2604 sizeof(struct create_sd_buf_req))
2605 return -EINVAL;
2606 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2607 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2608 }
2609
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2610 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2611 struct mnt_idmap *idmap,
2612 struct inode *inode)
2613 {
2614 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2615 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2616
2617 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2618 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2619 fattr->cf_mode = inode->i_mode;
2620 fattr->cf_acls = NULL;
2621 fattr->cf_dacls = NULL;
2622
2623 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2624 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2625 if (S_ISDIR(inode->i_mode))
2626 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2627 }
2628 }
2629
2630 enum {
2631 DURABLE_RECONN_V2 = 1,
2632 DURABLE_RECONN,
2633 DURABLE_REQ_V2,
2634 DURABLE_REQ,
2635 };
2636
2637 struct durable_info {
2638 struct ksmbd_file *fp;
2639 unsigned short int type;
2640 bool persistent;
2641 bool reconnected;
2642 unsigned int timeout;
2643 char *CreateGuid;
2644 };
2645
parse_durable_handle_context(struct ksmbd_work * work,struct smb2_create_req * req,struct lease_ctx_info * lc,struct durable_info * dh_info)2646 static int parse_durable_handle_context(struct ksmbd_work *work,
2647 struct smb2_create_req *req,
2648 struct lease_ctx_info *lc,
2649 struct durable_info *dh_info)
2650 {
2651 struct ksmbd_conn *conn = work->conn;
2652 struct create_context *context;
2653 int dh_idx, err = 0;
2654 u64 persistent_id = 0;
2655 int req_op_level;
2656 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2657
2658 req_op_level = req->RequestedOplockLevel;
2659 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2660 dh_idx++) {
2661 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2662 if (IS_ERR(context)) {
2663 err = PTR_ERR(context);
2664 goto out;
2665 }
2666 if (!context)
2667 continue;
2668
2669 switch (dh_idx) {
2670 case DURABLE_RECONN_V2:
2671 {
2672 struct create_durable_reconn_v2_req *recon_v2;
2673
2674 if (dh_info->type == DURABLE_RECONN ||
2675 dh_info->type == DURABLE_REQ_V2) {
2676 err = -EINVAL;
2677 goto out;
2678 }
2679
2680 recon_v2 = (struct create_durable_reconn_v2_req *)context;
2681 persistent_id = recon_v2->Fid.PersistentFileId;
2682 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2683 if (!dh_info->fp) {
2684 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2685 err = -EBADF;
2686 goto out;
2687 }
2688
2689 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2690 SMB2_CREATE_GUID_SIZE)) {
2691 err = -EBADF;
2692 ksmbd_put_durable_fd(dh_info->fp);
2693 goto out;
2694 }
2695
2696 dh_info->type = dh_idx;
2697 dh_info->reconnected = true;
2698 ksmbd_debug(SMB,
2699 "reconnect v2 Persistent-id from reconnect = %llu\n",
2700 persistent_id);
2701 break;
2702 }
2703 case DURABLE_RECONN:
2704 {
2705 struct create_durable_reconn_req *recon;
2706
2707 if (dh_info->type == DURABLE_RECONN_V2 ||
2708 dh_info->type == DURABLE_REQ_V2) {
2709 err = -EINVAL;
2710 goto out;
2711 }
2712
2713 recon = (struct create_durable_reconn_req *)context;
2714 persistent_id = recon->Data.Fid.PersistentFileId;
2715 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2716 if (!dh_info->fp) {
2717 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2718 err = -EBADF;
2719 goto out;
2720 }
2721
2722 dh_info->type = dh_idx;
2723 dh_info->reconnected = true;
2724 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2725 persistent_id);
2726 break;
2727 }
2728 case DURABLE_REQ_V2:
2729 {
2730 struct create_durable_req_v2 *durable_v2_blob;
2731
2732 if (dh_info->type == DURABLE_RECONN ||
2733 dh_info->type == DURABLE_RECONN_V2) {
2734 err = -EINVAL;
2735 goto out;
2736 }
2737
2738 durable_v2_blob =
2739 (struct create_durable_req_v2 *)context;
2740 ksmbd_debug(SMB, "Request for durable v2 open\n");
2741 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2742 if (dh_info->fp) {
2743 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2744 SMB2_CLIENT_GUID_SIZE)) {
2745 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2746 err = -ENOEXEC;
2747 goto out;
2748 }
2749
2750 dh_info->fp->conn = conn;
2751 dh_info->reconnected = true;
2752 goto out;
2753 }
2754 }
2755
2756 if (((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2757 req_op_level == SMB2_OPLOCK_LEVEL_BATCH)) {
2758 dh_info->CreateGuid =
2759 durable_v2_blob->CreateGuid;
2760 dh_info->persistent =
2761 le32_to_cpu(durable_v2_blob->Flags);
2762 dh_info->timeout =
2763 le32_to_cpu(durable_v2_blob->Timeout);
2764 dh_info->type = dh_idx;
2765 }
2766 break;
2767 }
2768 case DURABLE_REQ:
2769 if (dh_info->type == DURABLE_RECONN)
2770 goto out;
2771 if (dh_info->type == DURABLE_RECONN_V2 ||
2772 dh_info->type == DURABLE_REQ_V2) {
2773 err = -EINVAL;
2774 goto out;
2775 }
2776
2777 if (((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2778 req_op_level == SMB2_OPLOCK_LEVEL_BATCH)) {
2779 ksmbd_debug(SMB, "Request for durable open\n");
2780 dh_info->type = dh_idx;
2781 }
2782 }
2783 }
2784
2785 out:
2786 return err;
2787 }
2788
2789 /**
2790 * smb2_open() - handler for smb file open request
2791 * @work: smb work containing request buffer
2792 *
2793 * Return: 0 on success, otherwise error
2794 */
smb2_open(struct ksmbd_work * work)2795 int smb2_open(struct ksmbd_work *work)
2796 {
2797 struct ksmbd_conn *conn = work->conn;
2798 struct ksmbd_session *sess = work->sess;
2799 struct ksmbd_tree_connect *tcon = work->tcon;
2800 struct smb2_create_req *req;
2801 struct smb2_create_rsp *rsp;
2802 struct path path, parent_path;
2803 struct ksmbd_share_config *share = tcon->share_conf;
2804 struct ksmbd_file *fp = NULL;
2805 struct file *filp = NULL;
2806 struct mnt_idmap *idmap = NULL;
2807 struct kstat stat;
2808 struct create_context *context;
2809 struct lease_ctx_info *lc = NULL;
2810 struct create_ea_buf_req *ea_buf = NULL;
2811 struct oplock_info *opinfo;
2812 struct durable_info dh_info = {0};
2813 __le32 *next_ptr = NULL;
2814 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2815 int rc = 0;
2816 int contxt_cnt = 0, query_disk_id = 0;
2817 int maximal_access_ctxt = 0, posix_ctxt = 0;
2818 int s_type = 0;
2819 int next_off = 0;
2820 char *name = NULL;
2821 char *stream_name = NULL;
2822 bool file_present = false, created = false, already_permitted = false;
2823 int share_ret, need_truncate = 0;
2824 u64 time;
2825 umode_t posix_mode = 0;
2826 __le32 daccess, maximal_access = 0;
2827 int iov_len = 0;
2828
2829 WORK_BUFFERS(work, req, rsp);
2830
2831 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2832 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2833 ksmbd_debug(SMB, "invalid flag in chained command\n");
2834 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2835 smb2_set_err_rsp(work);
2836 return -EINVAL;
2837 }
2838
2839 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2840 ksmbd_debug(SMB, "IPC pipe create request\n");
2841 return create_smb2_pipe(work);
2842 }
2843
2844 if (req->NameLength) {
2845 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2846 *(char *)req->Buffer == '\\') {
2847 pr_err("not allow directory name included leading slash\n");
2848 rc = -EINVAL;
2849 goto err_out2;
2850 }
2851
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 if (rc != -ENOMEM)
2858 rc = -ENOENT;
2859 name = NULL;
2860 goto err_out2;
2861 }
2862
2863 ksmbd_debug(SMB, "converted name = %s\n", name);
2864 if (strchr(name, ':')) {
2865 if (!test_share_config_flag(work->tcon->share_conf,
2866 KSMBD_SHARE_FLAG_STREAMS)) {
2867 rc = -EBADF;
2868 goto err_out2;
2869 }
2870 rc = parse_stream_name(name, &stream_name, &s_type);
2871 if (rc < 0)
2872 goto err_out2;
2873 }
2874
2875 rc = ksmbd_validate_filename(name);
2876 if (rc < 0)
2877 goto err_out2;
2878
2879 if (ksmbd_share_veto_filename(share, name)) {
2880 rc = -ENOENT;
2881 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2882 name);
2883 goto err_out2;
2884 }
2885 } else {
2886 name = kstrdup("", GFP_KERNEL);
2887 if (!name) {
2888 rc = -ENOMEM;
2889 goto err_out2;
2890 }
2891 }
2892
2893 req_op_level = req->RequestedOplockLevel;
2894
2895 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2896 req->CreateContextsOffset) {
2897 lc = parse_lease_state(req);
2898 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2899 if (rc) {
2900 ksmbd_debug(SMB, "error parsing durable handle context\n");
2901 goto err_out2;
2902 }
2903
2904 if (dh_info.reconnected == true) {
2905 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2906 if (rc) {
2907 ksmbd_put_durable_fd(dh_info.fp);
2908 goto err_out2;
2909 }
2910
2911 rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2912 if (rc) {
2913 ksmbd_put_durable_fd(dh_info.fp);
2914 goto err_out2;
2915 }
2916
2917 if (ksmbd_override_fsids(work)) {
2918 rc = -ENOMEM;
2919 ksmbd_put_durable_fd(dh_info.fp);
2920 goto err_out2;
2921 }
2922
2923 fp = dh_info.fp;
2924 file_info = FILE_OPENED;
2925
2926 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2927 if (rc)
2928 goto err_out2;
2929
2930 ksmbd_put_durable_fd(fp);
2931 goto reconnected_fp;
2932 }
2933 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2934 lc = parse_lease_state(req);
2935
2936 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2937 pr_err("Invalid impersonationlevel : 0x%x\n",
2938 le32_to_cpu(req->ImpersonationLevel));
2939 rc = -EIO;
2940 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2941 goto err_out2;
2942 }
2943
2944 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2945 pr_err("Invalid create options : 0x%x\n",
2946 le32_to_cpu(req->CreateOptions));
2947 rc = -EINVAL;
2948 goto err_out2;
2949 } else {
2950 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2951 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2952 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2953
2954 if (req->CreateOptions &
2955 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2956 FILE_RESERVE_OPFILTER_LE)) {
2957 rc = -EOPNOTSUPP;
2958 goto err_out2;
2959 }
2960
2961 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2962 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2963 rc = -EINVAL;
2964 goto err_out2;
2965 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2966 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2967 }
2968 }
2969 }
2970
2971 if (le32_to_cpu(req->CreateDisposition) >
2972 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2973 pr_err("Invalid create disposition : 0x%x\n",
2974 le32_to_cpu(req->CreateDisposition));
2975 rc = -EINVAL;
2976 goto err_out2;
2977 }
2978
2979 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2980 pr_err("Invalid desired access : 0x%x\n",
2981 le32_to_cpu(req->DesiredAccess));
2982 rc = -EACCES;
2983 goto err_out2;
2984 }
2985
2986 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2987 pr_err("Invalid file attribute : 0x%x\n",
2988 le32_to_cpu(req->FileAttributes));
2989 rc = -EINVAL;
2990 goto err_out2;
2991 }
2992
2993 if (req->CreateContextsOffset) {
2994 /* Parse non-durable handle create contexts */
2995 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2996 if (IS_ERR(context)) {
2997 rc = PTR_ERR(context);
2998 goto err_out2;
2999 } else if (context) {
3000 ea_buf = (struct create_ea_buf_req *)context;
3001 if (le16_to_cpu(context->DataOffset) +
3002 le32_to_cpu(context->DataLength) <
3003 sizeof(struct create_ea_buf_req)) {
3004 rc = -EINVAL;
3005 goto err_out2;
3006 }
3007 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3008 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3009 rc = -EACCES;
3010 goto err_out2;
3011 }
3012 }
3013
3014 context = smb2_find_context_vals(req,
3015 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3016 if (IS_ERR(context)) {
3017 rc = PTR_ERR(context);
3018 goto err_out2;
3019 } else if (context) {
3020 ksmbd_debug(SMB,
3021 "get query maximal access context\n");
3022 maximal_access_ctxt = 1;
3023 }
3024
3025 context = smb2_find_context_vals(req,
3026 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3027 if (IS_ERR(context)) {
3028 rc = PTR_ERR(context);
3029 goto err_out2;
3030 } else if (context) {
3031 ksmbd_debug(SMB, "get timewarp context\n");
3032 rc = -EBADF;
3033 goto err_out2;
3034 }
3035
3036 if (tcon->posix_extensions) {
3037 context = smb2_find_context_vals(req,
3038 SMB2_CREATE_TAG_POSIX, 16);
3039 if (IS_ERR(context)) {
3040 rc = PTR_ERR(context);
3041 goto err_out2;
3042 } else if (context) {
3043 struct create_posix *posix =
3044 (struct create_posix *)context;
3045 if (le16_to_cpu(context->DataOffset) +
3046 le32_to_cpu(context->DataLength) <
3047 sizeof(struct create_posix) - 4) {
3048 rc = -EINVAL;
3049 goto err_out2;
3050 }
3051 ksmbd_debug(SMB, "get posix context\n");
3052
3053 posix_mode = le32_to_cpu(posix->Mode);
3054 posix_ctxt = 1;
3055 }
3056 }
3057 }
3058
3059 if (ksmbd_override_fsids(work)) {
3060 rc = -ENOMEM;
3061 goto err_out2;
3062 }
3063
3064 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3065 &parent_path, &path, 1);
3066 if (!rc) {
3067 file_present = true;
3068
3069 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3070 /*
3071 * If file exists with under flags, return access
3072 * denied error.
3073 */
3074 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3075 req->CreateDisposition == FILE_OPEN_IF_LE) {
3076 rc = -EACCES;
3077 goto err_out;
3078 }
3079
3080 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3081 ksmbd_debug(SMB,
3082 "User does not have write permission\n");
3083 rc = -EACCES;
3084 goto err_out;
3085 }
3086 } else if (d_is_symlink(path.dentry)) {
3087 rc = -EACCES;
3088 goto err_out;
3089 }
3090
3091 file_present = true;
3092 idmap = mnt_idmap(path.mnt);
3093 } else {
3094 if (rc != -ENOENT)
3095 goto err_out;
3096 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3097 name, rc);
3098 rc = 0;
3099 }
3100
3101 if (stream_name) {
3102 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3103 if (s_type == DATA_STREAM) {
3104 rc = -EIO;
3105 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3106 }
3107 } else {
3108 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3109 s_type == DATA_STREAM) {
3110 rc = -EIO;
3111 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3112 }
3113 }
3114
3115 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3116 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3117 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3118 rc = -EIO;
3119 }
3120
3121 if (rc < 0)
3122 goto err_out;
3123 }
3124
3125 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3126 S_ISDIR(d_inode(path.dentry)->i_mode) &&
3127 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3128 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3129 name, req->CreateOptions);
3130 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3131 rc = -EIO;
3132 goto err_out;
3133 }
3134
3135 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3136 !(req->CreateDisposition == FILE_CREATE_LE) &&
3137 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3138 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3139 rc = -EIO;
3140 goto err_out;
3141 }
3142
3143 if (!stream_name && file_present &&
3144 req->CreateDisposition == FILE_CREATE_LE) {
3145 rc = -EEXIST;
3146 goto err_out;
3147 }
3148
3149 daccess = smb_map_generic_desired_access(req->DesiredAccess);
3150
3151 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3152 rc = smb_check_perm_dacl(conn, &path, &daccess,
3153 sess->user->uid);
3154 if (rc)
3155 goto err_out;
3156 }
3157
3158 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3159 if (!file_present) {
3160 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3161 } else {
3162 ksmbd_vfs_query_maximal_access(idmap,
3163 path.dentry,
3164 &daccess);
3165 already_permitted = true;
3166 }
3167 maximal_access = daccess;
3168 }
3169
3170 open_flags = smb2_create_open_flags(file_present, daccess,
3171 req->CreateDisposition,
3172 &may_flags);
3173
3174 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3175 if (open_flags & (O_CREAT | O_TRUNC)) {
3176 ksmbd_debug(SMB,
3177 "User does not have write permission\n");
3178 rc = -EACCES;
3179 goto err_out;
3180 }
3181 }
3182
3183 /*create file if not present */
3184 if (!file_present) {
3185 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3186 posix_mode,
3187 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3188 if (rc) {
3189 if (rc == -ENOENT) {
3190 rc = -EIO;
3191 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3192 }
3193 goto err_out;
3194 }
3195
3196 created = true;
3197 idmap = mnt_idmap(path.mnt);
3198 if (ea_buf) {
3199 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3200 sizeof(struct smb2_ea_info)) {
3201 rc = -EINVAL;
3202 goto err_out;
3203 }
3204
3205 rc = smb2_set_ea(&ea_buf->ea,
3206 le32_to_cpu(ea_buf->ccontext.DataLength),
3207 &path, false);
3208 if (rc == -EOPNOTSUPP)
3209 rc = 0;
3210 else if (rc)
3211 goto err_out;
3212 }
3213 } else if (!already_permitted) {
3214 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3215 * because execute(search) permission on a parent directory,
3216 * is already granted.
3217 */
3218 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3219 rc = inode_permission(idmap,
3220 d_inode(path.dentry),
3221 may_flags);
3222 if (rc)
3223 goto err_out;
3224
3225 if ((daccess & FILE_DELETE_LE) ||
3226 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3227 rc = inode_permission(idmap,
3228 d_inode(path.dentry->d_parent),
3229 MAY_EXEC | MAY_WRITE);
3230 if (rc)
3231 goto err_out;
3232 }
3233 }
3234 }
3235
3236 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3237 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3238 rc = -EBUSY;
3239 goto err_out;
3240 }
3241
3242 rc = 0;
3243 filp = dentry_open(&path, open_flags, current_cred());
3244 if (IS_ERR(filp)) {
3245 rc = PTR_ERR(filp);
3246 pr_err("dentry open for dir failed, rc %d\n", rc);
3247 goto err_out;
3248 }
3249
3250 if (file_present) {
3251 if (!(open_flags & O_TRUNC))
3252 file_info = FILE_OPENED;
3253 else
3254 file_info = FILE_OVERWRITTEN;
3255
3256 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3257 FILE_SUPERSEDE_LE)
3258 file_info = FILE_SUPERSEDED;
3259 } else if (open_flags & O_CREAT) {
3260 file_info = FILE_CREATED;
3261 }
3262
3263 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3264
3265 /* Obtain Volatile-ID */
3266 fp = ksmbd_open_fd(work, filp);
3267 if (IS_ERR(fp)) {
3268 fput(filp);
3269 rc = PTR_ERR(fp);
3270 fp = NULL;
3271 goto err_out;
3272 }
3273
3274 /* Get Persistent-ID */
3275 ksmbd_open_durable_fd(fp);
3276 if (!has_file_id(fp->persistent_id)) {
3277 rc = -ENOMEM;
3278 goto err_out;
3279 }
3280
3281 fp->cdoption = req->CreateDisposition;
3282 fp->daccess = daccess;
3283 fp->saccess = req->ShareAccess;
3284 fp->coption = req->CreateOptions;
3285
3286 /* Set default windows and posix acls if creating new file */
3287 if (created) {
3288 int posix_acl_rc;
3289 struct inode *inode = d_inode(path.dentry);
3290
3291 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3292 &path,
3293 d_inode(path.dentry->d_parent));
3294 if (posix_acl_rc)
3295 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3296
3297 if (test_share_config_flag(work->tcon->share_conf,
3298 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3299 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3300 sess->user->gid);
3301 }
3302
3303 if (rc) {
3304 rc = smb2_create_sd_buffer(work, req, &path);
3305 if (rc) {
3306 if (posix_acl_rc)
3307 ksmbd_vfs_set_init_posix_acl(idmap,
3308 &path);
3309
3310 if (test_share_config_flag(work->tcon->share_conf,
3311 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3312 struct smb_fattr fattr;
3313 struct smb_ntsd *pntsd;
3314 int pntsd_size, ace_num = 0;
3315
3316 ksmbd_acls_fattr(&fattr, idmap, inode);
3317 if (fattr.cf_acls)
3318 ace_num = fattr.cf_acls->a_count;
3319 if (fattr.cf_dacls)
3320 ace_num += fattr.cf_dacls->a_count;
3321
3322 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3323 sizeof(struct smb_sid) * 3 +
3324 sizeof(struct smb_acl) +
3325 sizeof(struct smb_ace) * ace_num * 2,
3326 GFP_KERNEL);
3327 if (!pntsd) {
3328 posix_acl_release(fattr.cf_acls);
3329 posix_acl_release(fattr.cf_dacls);
3330 goto err_out;
3331 }
3332
3333 rc = build_sec_desc(idmap,
3334 pntsd, NULL, 0,
3335 OWNER_SECINFO |
3336 GROUP_SECINFO |
3337 DACL_SECINFO,
3338 &pntsd_size, &fattr);
3339 posix_acl_release(fattr.cf_acls);
3340 posix_acl_release(fattr.cf_dacls);
3341 if (rc) {
3342 kfree(pntsd);
3343 goto err_out;
3344 }
3345
3346 rc = ksmbd_vfs_set_sd_xattr(conn,
3347 idmap,
3348 &path,
3349 pntsd,
3350 pntsd_size,
3351 false);
3352 kfree(pntsd);
3353 if (rc)
3354 pr_err("failed to store ntacl in xattr : %d\n",
3355 rc);
3356 }
3357 }
3358 }
3359 rc = 0;
3360 }
3361
3362 if (stream_name) {
3363 rc = smb2_set_stream_name_xattr(&path,
3364 fp,
3365 stream_name,
3366 s_type);
3367 if (rc)
3368 goto err_out;
3369 file_info = FILE_CREATED;
3370 }
3371
3372 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3373 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3374
3375 /* fp should be searchable through ksmbd_inode.m_fp_list
3376 * after daccess, saccess, attrib_only, and stream are
3377 * initialized.
3378 */
3379 write_lock(&fp->f_ci->m_lock);
3380 list_add(&fp->node, &fp->f_ci->m_fp_list);
3381 write_unlock(&fp->f_ci->m_lock);
3382
3383 /* Check delete pending among previous fp before oplock break */
3384 if (ksmbd_inode_pending_delete(fp)) {
3385 rc = -EBUSY;
3386 goto err_out;
3387 }
3388
3389 if (file_present || created)
3390 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3391
3392 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3393 !fp->attrib_only && !stream_name) {
3394 smb_break_all_oplock(work, fp);
3395 need_truncate = 1;
3396 }
3397
3398 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3399 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3400 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3401 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3402 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3403 rc = share_ret;
3404 goto err_out1;
3405 }
3406 } else {
3407 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3408 if (S_ISDIR(file_inode(filp)->i_mode)) {
3409 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3410 lc->is_dir = true;
3411 }
3412
3413 /*
3414 * Compare parent lease using parent key. If there is no
3415 * a lease that has same parent key, Send lease break
3416 * notification.
3417 */
3418 smb_send_parent_lease_break_noti(fp, lc);
3419
3420 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3421 ksmbd_debug(SMB,
3422 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3423 name, req_op_level, lc->req_state);
3424 rc = find_same_lease_key(sess, fp->f_ci, lc);
3425 if (rc)
3426 goto err_out1;
3427 } else if (open_flags == O_RDONLY &&
3428 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3429 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3430 req_op_level = SMB2_OPLOCK_LEVEL_II;
3431
3432 rc = smb_grant_oplock(work, req_op_level,
3433 fp->persistent_id, fp,
3434 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3435 lc, share_ret);
3436 if (rc < 0)
3437 goto err_out1;
3438 }
3439
3440 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3441 ksmbd_fd_set_delete_on_close(fp, file_info);
3442
3443 if (need_truncate) {
3444 rc = smb2_create_truncate(&fp->filp->f_path);
3445 if (rc)
3446 goto err_out1;
3447 }
3448
3449 if (req->CreateContextsOffset) {
3450 struct create_alloc_size_req *az_req;
3451
3452 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3453 SMB2_CREATE_ALLOCATION_SIZE, 4);
3454 if (IS_ERR(az_req)) {
3455 rc = PTR_ERR(az_req);
3456 goto err_out1;
3457 } else if (az_req) {
3458 loff_t alloc_size;
3459 int err;
3460
3461 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3462 le32_to_cpu(az_req->ccontext.DataLength) <
3463 sizeof(struct create_alloc_size_req)) {
3464 rc = -EINVAL;
3465 goto err_out1;
3466 }
3467 alloc_size = le64_to_cpu(az_req->AllocationSize);
3468 ksmbd_debug(SMB,
3469 "request smb2 create allocate size : %llu\n",
3470 alloc_size);
3471 smb_break_all_levII_oplock(work, fp, 1);
3472 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3473 alloc_size);
3474 if (err < 0)
3475 ksmbd_debug(SMB,
3476 "vfs_fallocate is failed : %d\n",
3477 err);
3478 }
3479
3480 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3481 if (IS_ERR(context)) {
3482 rc = PTR_ERR(context);
3483 goto err_out1;
3484 } else if (context) {
3485 ksmbd_debug(SMB, "get query on disk id context\n");
3486 query_disk_id = 1;
3487 }
3488 }
3489
3490 rc = ksmbd_vfs_getattr(&path, &stat);
3491 if (rc)
3492 goto err_out1;
3493
3494 if (stat.result_mask & STATX_BTIME)
3495 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3496 else
3497 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3498 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3499 fp->f_ci->m_fattr =
3500 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3501
3502 if (!created)
3503 smb2_update_xattrs(tcon, &path, fp);
3504 else
3505 smb2_new_xattrs(tcon, &path, fp);
3506
3507 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3508
3509 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3510 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3511 test_share_config_flag(work->tcon->share_conf,
3512 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3513 fp->is_persistent = true;
3514 else
3515 fp->is_durable = true;
3516
3517 if (dh_info.type == DURABLE_REQ_V2) {
3518 memcpy(fp->create_guid, dh_info.CreateGuid,
3519 SMB2_CREATE_GUID_SIZE);
3520 if (dh_info.timeout)
3521 fp->durable_timeout = min(dh_info.timeout,
3522 300000);
3523 else
3524 fp->durable_timeout = 60;
3525 }
3526 }
3527
3528 reconnected_fp:
3529 rsp->StructureSize = cpu_to_le16(89);
3530 rcu_read_lock();
3531 opinfo = rcu_dereference(fp->f_opinfo);
3532 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3533 rcu_read_unlock();
3534 rsp->Flags = 0;
3535 rsp->CreateAction = cpu_to_le32(file_info);
3536 rsp->CreationTime = cpu_to_le64(fp->create_time);
3537 time = ksmbd_UnixTimeToNT(stat.atime);
3538 rsp->LastAccessTime = cpu_to_le64(time);
3539 time = ksmbd_UnixTimeToNT(stat.mtime);
3540 rsp->LastWriteTime = cpu_to_le64(time);
3541 time = ksmbd_UnixTimeToNT(stat.ctime);
3542 rsp->ChangeTime = cpu_to_le64(time);
3543 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3544 cpu_to_le64(stat.blocks << 9);
3545 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3546 rsp->FileAttributes = fp->f_ci->m_fattr;
3547
3548 rsp->Reserved2 = 0;
3549
3550 rsp->PersistentFileId = fp->persistent_id;
3551 rsp->VolatileFileId = fp->volatile_id;
3552
3553 rsp->CreateContextsOffset = 0;
3554 rsp->CreateContextsLength = 0;
3555 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3556
3557 /* If lease is request send lease context response */
3558 if (opinfo && opinfo->is_lease) {
3559 struct create_context *lease_ccontext;
3560
3561 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3562 name, opinfo->o_lease->state);
3563 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3564
3565 lease_ccontext = (struct create_context *)rsp->Buffer;
3566 contxt_cnt++;
3567 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3568 le32_add_cpu(&rsp->CreateContextsLength,
3569 conn->vals->create_lease_size);
3570 iov_len += conn->vals->create_lease_size;
3571 next_ptr = &lease_ccontext->Next;
3572 next_off = conn->vals->create_lease_size;
3573 }
3574
3575 if (maximal_access_ctxt) {
3576 struct create_context *mxac_ccontext;
3577
3578 if (maximal_access == 0)
3579 ksmbd_vfs_query_maximal_access(idmap,
3580 path.dentry,
3581 &maximal_access);
3582 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3583 le32_to_cpu(rsp->CreateContextsLength));
3584 contxt_cnt++;
3585 create_mxac_rsp_buf(rsp->Buffer +
3586 le32_to_cpu(rsp->CreateContextsLength),
3587 le32_to_cpu(maximal_access));
3588 le32_add_cpu(&rsp->CreateContextsLength,
3589 conn->vals->create_mxac_size);
3590 iov_len += conn->vals->create_mxac_size;
3591 if (next_ptr)
3592 *next_ptr = cpu_to_le32(next_off);
3593 next_ptr = &mxac_ccontext->Next;
3594 next_off = conn->vals->create_mxac_size;
3595 }
3596
3597 if (query_disk_id) {
3598 struct create_context *disk_id_ccontext;
3599
3600 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3601 le32_to_cpu(rsp->CreateContextsLength));
3602 contxt_cnt++;
3603 create_disk_id_rsp_buf(rsp->Buffer +
3604 le32_to_cpu(rsp->CreateContextsLength),
3605 stat.ino, tcon->id);
3606 le32_add_cpu(&rsp->CreateContextsLength,
3607 conn->vals->create_disk_id_size);
3608 iov_len += conn->vals->create_disk_id_size;
3609 if (next_ptr)
3610 *next_ptr = cpu_to_le32(next_off);
3611 next_ptr = &disk_id_ccontext->Next;
3612 next_off = conn->vals->create_disk_id_size;
3613 }
3614
3615 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3616 struct create_context *durable_ccontext;
3617
3618 durable_ccontext = (struct create_context *)(rsp->Buffer +
3619 le32_to_cpu(rsp->CreateContextsLength));
3620 contxt_cnt++;
3621 if (dh_info.type == DURABLE_REQ) {
3622 create_durable_rsp_buf(rsp->Buffer +
3623 le32_to_cpu(rsp->CreateContextsLength));
3624 le32_add_cpu(&rsp->CreateContextsLength,
3625 conn->vals->create_durable_size);
3626 iov_len += conn->vals->create_durable_size;
3627 } else {
3628 create_durable_v2_rsp_buf(rsp->Buffer +
3629 le32_to_cpu(rsp->CreateContextsLength),
3630 fp);
3631 le32_add_cpu(&rsp->CreateContextsLength,
3632 conn->vals->create_durable_v2_size);
3633 iov_len += conn->vals->create_durable_v2_size;
3634 }
3635
3636 if (next_ptr)
3637 *next_ptr = cpu_to_le32(next_off);
3638 next_ptr = &durable_ccontext->Next;
3639 next_off = conn->vals->create_durable_size;
3640 }
3641
3642 if (posix_ctxt) {
3643 contxt_cnt++;
3644 create_posix_rsp_buf(rsp->Buffer +
3645 le32_to_cpu(rsp->CreateContextsLength),
3646 fp);
3647 le32_add_cpu(&rsp->CreateContextsLength,
3648 conn->vals->create_posix_size);
3649 iov_len += conn->vals->create_posix_size;
3650 if (next_ptr)
3651 *next_ptr = cpu_to_le32(next_off);
3652 }
3653
3654 if (contxt_cnt > 0) {
3655 rsp->CreateContextsOffset =
3656 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3657 }
3658
3659 err_out:
3660 if (rc && (file_present || created))
3661 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3662
3663 err_out1:
3664 ksmbd_revert_fsids(work);
3665
3666 err_out2:
3667 if (!rc) {
3668 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3669 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3670 }
3671 if (rc) {
3672 if (rc == -EINVAL)
3673 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3674 else if (rc == -EOPNOTSUPP)
3675 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3676 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3677 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3678 else if (rc == -ENOENT)
3679 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3680 else if (rc == -EPERM)
3681 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3682 else if (rc == -EBUSY)
3683 rsp->hdr.Status = STATUS_DELETE_PENDING;
3684 else if (rc == -EBADF)
3685 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3686 else if (rc == -ENOEXEC)
3687 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3688 else if (rc == -ENXIO)
3689 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3690 else if (rc == -EEXIST)
3691 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3692 else if (rc == -EMFILE)
3693 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3694 if (!rsp->hdr.Status)
3695 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3696
3697 if (fp)
3698 ksmbd_fd_put(work, fp);
3699 smb2_set_err_rsp(work);
3700 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3701 }
3702
3703 kfree(name);
3704 kfree(lc);
3705
3706 return 0;
3707 }
3708
readdir_info_level_struct_sz(int info_level)3709 static int readdir_info_level_struct_sz(int info_level)
3710 {
3711 switch (info_level) {
3712 case FILE_FULL_DIRECTORY_INFORMATION:
3713 return sizeof(struct file_full_directory_info);
3714 case FILE_BOTH_DIRECTORY_INFORMATION:
3715 return sizeof(struct file_both_directory_info);
3716 case FILE_DIRECTORY_INFORMATION:
3717 return sizeof(struct file_directory_info);
3718 case FILE_NAMES_INFORMATION:
3719 return sizeof(struct file_names_info);
3720 case FILEID_FULL_DIRECTORY_INFORMATION:
3721 return sizeof(struct file_id_full_dir_info);
3722 case FILEID_BOTH_DIRECTORY_INFORMATION:
3723 return sizeof(struct file_id_both_directory_info);
3724 case SMB_FIND_FILE_POSIX_INFO:
3725 return sizeof(struct smb2_posix_info);
3726 default:
3727 return -EOPNOTSUPP;
3728 }
3729 }
3730
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3731 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3732 {
3733 switch (info_level) {
3734 case FILE_FULL_DIRECTORY_INFORMATION:
3735 {
3736 struct file_full_directory_info *ffdinfo;
3737
3738 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3739 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3740 d_info->name = ffdinfo->FileName;
3741 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3742 return 0;
3743 }
3744 case FILE_BOTH_DIRECTORY_INFORMATION:
3745 {
3746 struct file_both_directory_info *fbdinfo;
3747
3748 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3749 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3750 d_info->name = fbdinfo->FileName;
3751 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3752 return 0;
3753 }
3754 case FILE_DIRECTORY_INFORMATION:
3755 {
3756 struct file_directory_info *fdinfo;
3757
3758 fdinfo = (struct file_directory_info *)d_info->rptr;
3759 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3760 d_info->name = fdinfo->FileName;
3761 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3762 return 0;
3763 }
3764 case FILE_NAMES_INFORMATION:
3765 {
3766 struct file_names_info *fninfo;
3767
3768 fninfo = (struct file_names_info *)d_info->rptr;
3769 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3770 d_info->name = fninfo->FileName;
3771 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3772 return 0;
3773 }
3774 case FILEID_FULL_DIRECTORY_INFORMATION:
3775 {
3776 struct file_id_full_dir_info *dinfo;
3777
3778 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3779 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3780 d_info->name = dinfo->FileName;
3781 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3782 return 0;
3783 }
3784 case FILEID_BOTH_DIRECTORY_INFORMATION:
3785 {
3786 struct file_id_both_directory_info *fibdinfo;
3787
3788 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3789 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3790 d_info->name = fibdinfo->FileName;
3791 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3792 return 0;
3793 }
3794 case SMB_FIND_FILE_POSIX_INFO:
3795 {
3796 struct smb2_posix_info *posix_info;
3797
3798 posix_info = (struct smb2_posix_info *)d_info->rptr;
3799 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3800 d_info->name = posix_info->name;
3801 d_info->name_len = le32_to_cpu(posix_info->name_len);
3802 return 0;
3803 }
3804 default:
3805 return -EINVAL;
3806 }
3807 }
3808
3809 /**
3810 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3811 * buffer
3812 * @conn: connection instance
3813 * @info_level: smb information level
3814 * @d_info: structure included variables for query dir
3815 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3816 *
3817 * if directory has many entries, find first can't read it fully.
3818 * find next might be called multiple times to read remaining dir entries
3819 *
3820 * Return: 0 on success, otherwise error
3821 */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3822 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3823 struct ksmbd_dir_info *d_info,
3824 struct ksmbd_kstat *ksmbd_kstat)
3825 {
3826 int next_entry_offset = 0;
3827 char *conv_name;
3828 int conv_len;
3829 void *kstat;
3830 int struct_sz, rc = 0;
3831
3832 conv_name = ksmbd_convert_dir_info_name(d_info,
3833 conn->local_nls,
3834 &conv_len);
3835 if (!conv_name)
3836 return -ENOMEM;
3837
3838 /* Somehow the name has only terminating NULL bytes */
3839 if (conv_len < 0) {
3840 rc = -EINVAL;
3841 goto free_conv_name;
3842 }
3843
3844 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3845 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3846 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3847
3848 if (next_entry_offset > d_info->out_buf_len) {
3849 d_info->out_buf_len = 0;
3850 rc = -ENOSPC;
3851 goto free_conv_name;
3852 }
3853
3854 kstat = d_info->wptr;
3855 if (info_level != FILE_NAMES_INFORMATION)
3856 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3857
3858 switch (info_level) {
3859 case FILE_FULL_DIRECTORY_INFORMATION:
3860 {
3861 struct file_full_directory_info *ffdinfo;
3862
3863 ffdinfo = (struct file_full_directory_info *)kstat;
3864 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3865 ffdinfo->EaSize =
3866 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3867 if (ffdinfo->EaSize)
3868 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3869 if (d_info->hide_dot_file && d_info->name[0] == '.')
3870 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3871 memcpy(ffdinfo->FileName, conv_name, conv_len);
3872 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3873 break;
3874 }
3875 case FILE_BOTH_DIRECTORY_INFORMATION:
3876 {
3877 struct file_both_directory_info *fbdinfo;
3878
3879 fbdinfo = (struct file_both_directory_info *)kstat;
3880 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3881 fbdinfo->EaSize =
3882 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3883 if (fbdinfo->EaSize)
3884 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3885 fbdinfo->ShortNameLength = 0;
3886 fbdinfo->Reserved = 0;
3887 if (d_info->hide_dot_file && d_info->name[0] == '.')
3888 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3889 memcpy(fbdinfo->FileName, conv_name, conv_len);
3890 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3891 break;
3892 }
3893 case FILE_DIRECTORY_INFORMATION:
3894 {
3895 struct file_directory_info *fdinfo;
3896
3897 fdinfo = (struct file_directory_info *)kstat;
3898 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3899 if (d_info->hide_dot_file && d_info->name[0] == '.')
3900 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3901 memcpy(fdinfo->FileName, conv_name, conv_len);
3902 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3903 break;
3904 }
3905 case FILE_NAMES_INFORMATION:
3906 {
3907 struct file_names_info *fninfo;
3908
3909 fninfo = (struct file_names_info *)kstat;
3910 fninfo->FileNameLength = cpu_to_le32(conv_len);
3911 memcpy(fninfo->FileName, conv_name, conv_len);
3912 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3913 break;
3914 }
3915 case FILEID_FULL_DIRECTORY_INFORMATION:
3916 {
3917 struct file_id_full_dir_info *dinfo;
3918
3919 dinfo = (struct file_id_full_dir_info *)kstat;
3920 dinfo->FileNameLength = cpu_to_le32(conv_len);
3921 dinfo->EaSize =
3922 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3923 if (dinfo->EaSize)
3924 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3925 dinfo->Reserved = 0;
3926 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3927 if (d_info->hide_dot_file && d_info->name[0] == '.')
3928 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3929 memcpy(dinfo->FileName, conv_name, conv_len);
3930 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3931 break;
3932 }
3933 case FILEID_BOTH_DIRECTORY_INFORMATION:
3934 {
3935 struct file_id_both_directory_info *fibdinfo;
3936
3937 fibdinfo = (struct file_id_both_directory_info *)kstat;
3938 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3939 fibdinfo->EaSize =
3940 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3941 if (fibdinfo->EaSize)
3942 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3943 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3944 fibdinfo->ShortNameLength = 0;
3945 fibdinfo->Reserved = 0;
3946 fibdinfo->Reserved2 = cpu_to_le16(0);
3947 if (d_info->hide_dot_file && d_info->name[0] == '.')
3948 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3949 memcpy(fibdinfo->FileName, conv_name, conv_len);
3950 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3951 break;
3952 }
3953 case SMB_FIND_FILE_POSIX_INFO:
3954 {
3955 struct smb2_posix_info *posix_info;
3956 u64 time;
3957
3958 posix_info = (struct smb2_posix_info *)kstat;
3959 posix_info->Ignored = 0;
3960 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3961 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3962 posix_info->ChangeTime = cpu_to_le64(time);
3963 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3964 posix_info->LastAccessTime = cpu_to_le64(time);
3965 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3966 posix_info->LastWriteTime = cpu_to_le64(time);
3967 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3968 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3969 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3970 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3971 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3972 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3973 posix_info->DosAttributes =
3974 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3975 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3976 if (d_info->hide_dot_file && d_info->name[0] == '.')
3977 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3978 /*
3979 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3980 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3981 * sub_auth(4 * 1(num_subauth)) + RID(4).
3982 */
3983 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3984 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3985 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3986 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3987 memcpy(posix_info->name, conv_name, conv_len);
3988 posix_info->name_len = cpu_to_le32(conv_len);
3989 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3990 break;
3991 }
3992
3993 } /* switch (info_level) */
3994
3995 d_info->last_entry_offset = d_info->data_count;
3996 d_info->data_count += next_entry_offset;
3997 d_info->out_buf_len -= next_entry_offset;
3998 d_info->wptr += next_entry_offset;
3999
4000 ksmbd_debug(SMB,
4001 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4002 info_level, d_info->out_buf_len,
4003 next_entry_offset, d_info->data_count);
4004
4005 free_conv_name:
4006 kfree(conv_name);
4007 return rc;
4008 }
4009
4010 struct smb2_query_dir_private {
4011 struct ksmbd_work *work;
4012 char *search_pattern;
4013 struct ksmbd_file *dir_fp;
4014
4015 struct ksmbd_dir_info *d_info;
4016 int info_level;
4017 };
4018
lock_dir(struct ksmbd_file * dir_fp)4019 static void lock_dir(struct ksmbd_file *dir_fp)
4020 {
4021 struct dentry *dir = dir_fp->filp->f_path.dentry;
4022
4023 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4024 }
4025
unlock_dir(struct ksmbd_file * dir_fp)4026 static void unlock_dir(struct ksmbd_file *dir_fp)
4027 {
4028 struct dentry *dir = dir_fp->filp->f_path.dentry;
4029
4030 inode_unlock(d_inode(dir));
4031 }
4032
process_query_dir_entries(struct smb2_query_dir_private * priv)4033 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4034 {
4035 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
4036 struct kstat kstat;
4037 struct ksmbd_kstat ksmbd_kstat;
4038 int rc;
4039 int i;
4040
4041 for (i = 0; i < priv->d_info->num_entry; i++) {
4042 struct dentry *dent;
4043
4044 if (dentry_name(priv->d_info, priv->info_level))
4045 return -EINVAL;
4046
4047 lock_dir(priv->dir_fp);
4048 dent = lookup_one(idmap, priv->d_info->name,
4049 priv->dir_fp->filp->f_path.dentry,
4050 priv->d_info->name_len);
4051 unlock_dir(priv->dir_fp);
4052
4053 if (IS_ERR(dent)) {
4054 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4055 priv->d_info->name,
4056 PTR_ERR(dent));
4057 continue;
4058 }
4059 if (unlikely(d_is_negative(dent))) {
4060 dput(dent);
4061 ksmbd_debug(SMB, "Negative dentry `%s'\n",
4062 priv->d_info->name);
4063 continue;
4064 }
4065
4066 ksmbd_kstat.kstat = &kstat;
4067 if (priv->info_level != FILE_NAMES_INFORMATION) {
4068 rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4069 idmap,
4070 dent,
4071 &ksmbd_kstat);
4072 if (rc) {
4073 dput(dent);
4074 continue;
4075 }
4076 }
4077
4078 rc = smb2_populate_readdir_entry(priv->work->conn,
4079 priv->info_level,
4080 priv->d_info,
4081 &ksmbd_kstat);
4082 dput(dent);
4083 if (rc)
4084 return rc;
4085 }
4086 return 0;
4087 }
4088
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)4089 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4090 int info_level)
4091 {
4092 int struct_sz;
4093 int conv_len;
4094 int next_entry_offset;
4095
4096 struct_sz = readdir_info_level_struct_sz(info_level);
4097 if (struct_sz == -EOPNOTSUPP)
4098 return -EOPNOTSUPP;
4099
4100 conv_len = (d_info->name_len + 1) * 2;
4101 next_entry_offset = ALIGN(struct_sz + conv_len,
4102 KSMBD_DIR_INFO_ALIGNMENT);
4103
4104 if (next_entry_offset > d_info->out_buf_len) {
4105 d_info->out_buf_len = 0;
4106 return -ENOSPC;
4107 }
4108
4109 switch (info_level) {
4110 case FILE_FULL_DIRECTORY_INFORMATION:
4111 {
4112 struct file_full_directory_info *ffdinfo;
4113
4114 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4115 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4116 ffdinfo->FileName[d_info->name_len] = 0x00;
4117 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4118 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4119 break;
4120 }
4121 case FILE_BOTH_DIRECTORY_INFORMATION:
4122 {
4123 struct file_both_directory_info *fbdinfo;
4124
4125 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4126 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4127 fbdinfo->FileName[d_info->name_len] = 0x00;
4128 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4129 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4130 break;
4131 }
4132 case FILE_DIRECTORY_INFORMATION:
4133 {
4134 struct file_directory_info *fdinfo;
4135
4136 fdinfo = (struct file_directory_info *)d_info->wptr;
4137 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4138 fdinfo->FileName[d_info->name_len] = 0x00;
4139 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4140 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4141 break;
4142 }
4143 case FILE_NAMES_INFORMATION:
4144 {
4145 struct file_names_info *fninfo;
4146
4147 fninfo = (struct file_names_info *)d_info->wptr;
4148 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4149 fninfo->FileName[d_info->name_len] = 0x00;
4150 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4151 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4152 break;
4153 }
4154 case FILEID_FULL_DIRECTORY_INFORMATION:
4155 {
4156 struct file_id_full_dir_info *dinfo;
4157
4158 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4159 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4160 dinfo->FileName[d_info->name_len] = 0x00;
4161 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4162 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4163 break;
4164 }
4165 case FILEID_BOTH_DIRECTORY_INFORMATION:
4166 {
4167 struct file_id_both_directory_info *fibdinfo;
4168
4169 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4170 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4171 fibdinfo->FileName[d_info->name_len] = 0x00;
4172 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4173 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4174 break;
4175 }
4176 case SMB_FIND_FILE_POSIX_INFO:
4177 {
4178 struct smb2_posix_info *posix_info;
4179
4180 posix_info = (struct smb2_posix_info *)d_info->wptr;
4181 memcpy(posix_info->name, d_info->name, d_info->name_len);
4182 posix_info->name[d_info->name_len] = 0x00;
4183 posix_info->name_len = cpu_to_le32(d_info->name_len);
4184 posix_info->NextEntryOffset =
4185 cpu_to_le32(next_entry_offset);
4186 break;
4187 }
4188 } /* switch (info_level) */
4189
4190 d_info->num_entry++;
4191 d_info->out_buf_len -= next_entry_offset;
4192 d_info->wptr += next_entry_offset;
4193 return 0;
4194 }
4195
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)4196 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4197 loff_t offset, u64 ino, unsigned int d_type)
4198 {
4199 struct ksmbd_readdir_data *buf;
4200 struct smb2_query_dir_private *priv;
4201 struct ksmbd_dir_info *d_info;
4202 int rc;
4203
4204 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
4205 priv = buf->private;
4206 d_info = priv->d_info;
4207
4208 /* dot and dotdot entries are already reserved */
4209 if (!strcmp(".", name) || !strcmp("..", name))
4210 return true;
4211 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4212 return true;
4213 if (!match_pattern(name, namlen, priv->search_pattern))
4214 return true;
4215
4216 d_info->name = name;
4217 d_info->name_len = namlen;
4218 rc = reserve_populate_dentry(d_info, priv->info_level);
4219 if (rc)
4220 return false;
4221 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4222 d_info->out_buf_len = 0;
4223 return true;
4224 }
4225
verify_info_level(int info_level)4226 static int verify_info_level(int info_level)
4227 {
4228 switch (info_level) {
4229 case FILE_FULL_DIRECTORY_INFORMATION:
4230 case FILE_BOTH_DIRECTORY_INFORMATION:
4231 case FILE_DIRECTORY_INFORMATION:
4232 case FILE_NAMES_INFORMATION:
4233 case FILEID_FULL_DIRECTORY_INFORMATION:
4234 case FILEID_BOTH_DIRECTORY_INFORMATION:
4235 case SMB_FIND_FILE_POSIX_INFO:
4236 break;
4237 default:
4238 return -EOPNOTSUPP;
4239 }
4240
4241 return 0;
4242 }
4243
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4244 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4245 {
4246 int free_len;
4247
4248 free_len = (int)(work->response_sz -
4249 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4250 return free_len;
4251 }
4252
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4253 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4254 unsigned short hdr2_len,
4255 unsigned int out_buf_len)
4256 {
4257 int free_len;
4258
4259 if (out_buf_len > work->conn->vals->max_trans_size)
4260 return -EINVAL;
4261
4262 free_len = smb2_resp_buf_len(work, hdr2_len);
4263 if (free_len < 0)
4264 return -EINVAL;
4265
4266 return min_t(int, out_buf_len, free_len);
4267 }
4268
smb2_query_dir(struct ksmbd_work * work)4269 int smb2_query_dir(struct ksmbd_work *work)
4270 {
4271 struct ksmbd_conn *conn = work->conn;
4272 struct smb2_query_directory_req *req;
4273 struct smb2_query_directory_rsp *rsp;
4274 struct ksmbd_share_config *share = work->tcon->share_conf;
4275 struct ksmbd_file *dir_fp = NULL;
4276 struct ksmbd_dir_info d_info;
4277 int rc = 0;
4278 char *srch_ptr = NULL;
4279 unsigned char srch_flag;
4280 int buffer_sz;
4281 struct smb2_query_dir_private query_dir_private = {NULL, };
4282
4283 WORK_BUFFERS(work, req, rsp);
4284
4285 if (ksmbd_override_fsids(work)) {
4286 rsp->hdr.Status = STATUS_NO_MEMORY;
4287 smb2_set_err_rsp(work);
4288 return -ENOMEM;
4289 }
4290
4291 rc = verify_info_level(req->FileInformationClass);
4292 if (rc) {
4293 rc = -EFAULT;
4294 goto err_out2;
4295 }
4296
4297 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4298 if (!dir_fp) {
4299 rc = -EBADF;
4300 goto err_out2;
4301 }
4302
4303 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4304 inode_permission(file_mnt_idmap(dir_fp->filp),
4305 file_inode(dir_fp->filp),
4306 MAY_READ | MAY_EXEC)) {
4307 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4308 rc = -EACCES;
4309 goto err_out2;
4310 }
4311
4312 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4313 pr_err("can't do query dir for a file\n");
4314 rc = -EINVAL;
4315 goto err_out2;
4316 }
4317
4318 srch_flag = req->Flags;
4319 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4320 le16_to_cpu(req->FileNameLength), 1,
4321 conn->local_nls);
4322 if (IS_ERR(srch_ptr)) {
4323 ksmbd_debug(SMB, "Search Pattern not found\n");
4324 rc = -EINVAL;
4325 goto err_out2;
4326 } else {
4327 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4328 }
4329
4330 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4331 ksmbd_debug(SMB, "Restart directory scan\n");
4332 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4333 }
4334
4335 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4336 d_info.wptr = (char *)rsp->Buffer;
4337 d_info.rptr = (char *)rsp->Buffer;
4338 d_info.out_buf_len =
4339 smb2_calc_max_out_buf_len(work, 8,
4340 le32_to_cpu(req->OutputBufferLength));
4341 if (d_info.out_buf_len < 0) {
4342 rc = -EINVAL;
4343 goto err_out;
4344 }
4345 d_info.flags = srch_flag;
4346
4347 /*
4348 * reserve dot and dotdot entries in head of buffer
4349 * in first response
4350 */
4351 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4352 dir_fp, &d_info, srch_ptr,
4353 smb2_populate_readdir_entry);
4354 if (rc == -ENOSPC)
4355 rc = 0;
4356 else if (rc)
4357 goto err_out;
4358
4359 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4360 d_info.hide_dot_file = true;
4361
4362 buffer_sz = d_info.out_buf_len;
4363 d_info.rptr = d_info.wptr;
4364 query_dir_private.work = work;
4365 query_dir_private.search_pattern = srch_ptr;
4366 query_dir_private.dir_fp = dir_fp;
4367 query_dir_private.d_info = &d_info;
4368 query_dir_private.info_level = req->FileInformationClass;
4369 dir_fp->readdir_data.private = &query_dir_private;
4370 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4371
4372 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4373 /*
4374 * req->OutputBufferLength is too small to contain even one entry.
4375 * In this case, it immediately returns OutputBufferLength 0 to client.
4376 */
4377 if (!d_info.out_buf_len && !d_info.num_entry)
4378 goto no_buf_len;
4379 if (rc > 0 || rc == -ENOSPC)
4380 rc = 0;
4381 else if (rc)
4382 goto err_out;
4383
4384 d_info.wptr = d_info.rptr;
4385 d_info.out_buf_len = buffer_sz;
4386 rc = process_query_dir_entries(&query_dir_private);
4387 if (rc)
4388 goto err_out;
4389
4390 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4391 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4392 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4393 } else {
4394 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4395 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4396 }
4397 rsp->StructureSize = cpu_to_le16(9);
4398 rsp->OutputBufferOffset = cpu_to_le16(0);
4399 rsp->OutputBufferLength = cpu_to_le32(0);
4400 rsp->Buffer[0] = 0;
4401 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4402 sizeof(struct smb2_query_directory_rsp));
4403 if (rc)
4404 goto err_out;
4405 } else {
4406 no_buf_len:
4407 ((struct file_directory_info *)
4408 ((char *)rsp->Buffer + d_info.last_entry_offset))
4409 ->NextEntryOffset = 0;
4410 if (d_info.data_count >= d_info.last_entry_off_align)
4411 d_info.data_count -= d_info.last_entry_off_align;
4412
4413 rsp->StructureSize = cpu_to_le16(9);
4414 rsp->OutputBufferOffset = cpu_to_le16(72);
4415 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4416 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4417 offsetof(struct smb2_query_directory_rsp, Buffer) +
4418 d_info.data_count);
4419 if (rc)
4420 goto err_out;
4421 }
4422
4423 kfree(srch_ptr);
4424 ksmbd_fd_put(work, dir_fp);
4425 ksmbd_revert_fsids(work);
4426 return 0;
4427
4428 err_out:
4429 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4430 kfree(srch_ptr);
4431
4432 err_out2:
4433 if (rc == -EINVAL)
4434 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4435 else if (rc == -EACCES)
4436 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4437 else if (rc == -ENOENT)
4438 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4439 else if (rc == -EBADF)
4440 rsp->hdr.Status = STATUS_FILE_CLOSED;
4441 else if (rc == -ENOMEM)
4442 rsp->hdr.Status = STATUS_NO_MEMORY;
4443 else if (rc == -EFAULT)
4444 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4445 else if (rc == -EIO)
4446 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4447 if (!rsp->hdr.Status)
4448 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4449
4450 smb2_set_err_rsp(work);
4451 ksmbd_fd_put(work, dir_fp);
4452 ksmbd_revert_fsids(work);
4453 return 0;
4454 }
4455
4456 /**
4457 * buffer_check_err() - helper function to check buffer errors
4458 * @reqOutputBufferLength: max buffer length expected in command response
4459 * @rsp: query info response buffer contains output buffer length
4460 * @rsp_org: base response buffer pointer in case of chained response
4461 *
4462 * Return: 0 on success, otherwise error
4463 */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4464 static int buffer_check_err(int reqOutputBufferLength,
4465 struct smb2_query_info_rsp *rsp,
4466 void *rsp_org)
4467 {
4468 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4469 pr_err("Invalid Buffer Size Requested\n");
4470 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4471 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4472 return -EINVAL;
4473 }
4474 return 0;
4475 }
4476
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4477 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4478 void *rsp_org)
4479 {
4480 struct smb2_file_standard_info *sinfo;
4481
4482 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4483
4484 sinfo->AllocationSize = cpu_to_le64(4096);
4485 sinfo->EndOfFile = cpu_to_le64(0);
4486 sinfo->NumberOfLinks = cpu_to_le32(1);
4487 sinfo->DeletePending = 1;
4488 sinfo->Directory = 0;
4489 rsp->OutputBufferLength =
4490 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4491 }
4492
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4493 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4494 void *rsp_org)
4495 {
4496 struct smb2_file_internal_info *file_info;
4497
4498 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4499
4500 /* any unique number */
4501 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4502 rsp->OutputBufferLength =
4503 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4504 }
4505
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4506 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4507 struct smb2_query_info_req *req,
4508 struct smb2_query_info_rsp *rsp,
4509 void *rsp_org)
4510 {
4511 u64 id;
4512 int rc;
4513
4514 /*
4515 * Windows can sometime send query file info request on
4516 * pipe without opening it, checking error condition here
4517 */
4518 id = req->VolatileFileId;
4519 if (!ksmbd_session_rpc_method(sess, id))
4520 return -ENOENT;
4521
4522 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4523 req->FileInfoClass, req->VolatileFileId);
4524
4525 switch (req->FileInfoClass) {
4526 case FILE_STANDARD_INFORMATION:
4527 get_standard_info_pipe(rsp, rsp_org);
4528 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4529 rsp, rsp_org);
4530 break;
4531 case FILE_INTERNAL_INFORMATION:
4532 get_internal_info_pipe(rsp, id, rsp_org);
4533 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4534 rsp, rsp_org);
4535 break;
4536 default:
4537 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4538 req->FileInfoClass);
4539 rc = -EOPNOTSUPP;
4540 }
4541 return rc;
4542 }
4543
4544 /**
4545 * smb2_get_ea() - handler for smb2 get extended attribute command
4546 * @work: smb work containing query info command buffer
4547 * @fp: ksmbd_file pointer
4548 * @req: get extended attribute request
4549 * @rsp: response buffer pointer
4550 * @rsp_org: base response buffer pointer in case of chained response
4551 *
4552 * Return: 0 on success, otherwise error
4553 */
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)4554 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4555 struct smb2_query_info_req *req,
4556 struct smb2_query_info_rsp *rsp, void *rsp_org)
4557 {
4558 struct smb2_ea_info *eainfo, *prev_eainfo;
4559 char *name, *ptr, *xattr_list = NULL, *buf;
4560 int rc, name_len, value_len, xattr_list_len, idx;
4561 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4562 struct smb2_ea_info_req *ea_req = NULL;
4563 const struct path *path;
4564 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4565
4566 if (!(fp->daccess & FILE_READ_EA_LE)) {
4567 pr_err("Not permitted to read ext attr : 0x%x\n",
4568 fp->daccess);
4569 return -EACCES;
4570 }
4571
4572 path = &fp->filp->f_path;
4573 /* single EA entry is requested with given user.* name */
4574 if (req->InputBufferLength) {
4575 if (le32_to_cpu(req->InputBufferLength) <
4576 sizeof(struct smb2_ea_info_req))
4577 return -EINVAL;
4578
4579 ea_req = (struct smb2_ea_info_req *)((char *)req +
4580 le16_to_cpu(req->InputBufferOffset));
4581 } else {
4582 /* need to send all EAs, if no specific EA is requested*/
4583 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4584 ksmbd_debug(SMB,
4585 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4586 le32_to_cpu(req->Flags));
4587 }
4588
4589 buf_free_len =
4590 smb2_calc_max_out_buf_len(work, 8,
4591 le32_to_cpu(req->OutputBufferLength));
4592 if (buf_free_len < 0)
4593 return -EINVAL;
4594
4595 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4596 if (rc < 0) {
4597 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4598 goto out;
4599 } else if (!rc) { /* there is no EA in the file */
4600 ksmbd_debug(SMB, "no ea data in the file\n");
4601 goto done;
4602 }
4603 xattr_list_len = rc;
4604
4605 ptr = (char *)rsp->Buffer;
4606 eainfo = (struct smb2_ea_info *)ptr;
4607 prev_eainfo = eainfo;
4608 idx = 0;
4609
4610 while (idx < xattr_list_len) {
4611 name = xattr_list + idx;
4612 name_len = strlen(name);
4613
4614 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4615 idx += name_len + 1;
4616
4617 /*
4618 * CIFS does not support EA other than user.* namespace,
4619 * still keep the framework generic, to list other attrs
4620 * in future.
4621 */
4622 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4623 continue;
4624
4625 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4626 STREAM_PREFIX_LEN))
4627 continue;
4628
4629 if (req->InputBufferLength &&
4630 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4631 ea_req->EaNameLength))
4632 continue;
4633
4634 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4635 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4636 continue;
4637
4638 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4639 name_len -= XATTR_USER_PREFIX_LEN;
4640
4641 ptr = eainfo->name + name_len + 1;
4642 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4643 name_len + 1);
4644 /* bailout if xattr can't fit in buf_free_len */
4645 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4646 name, &buf);
4647 if (value_len <= 0) {
4648 rc = -ENOENT;
4649 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4650 goto out;
4651 }
4652
4653 buf_free_len -= value_len;
4654 if (buf_free_len < 0) {
4655 kfree(buf);
4656 break;
4657 }
4658
4659 memcpy(ptr, buf, value_len);
4660 kfree(buf);
4661
4662 ptr += value_len;
4663 eainfo->Flags = 0;
4664 eainfo->EaNameLength = name_len;
4665
4666 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4667 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4668 name_len);
4669 else
4670 memcpy(eainfo->name, name, name_len);
4671
4672 eainfo->name[name_len] = '\0';
4673 eainfo->EaValueLength = cpu_to_le16(value_len);
4674 next_offset = offsetof(struct smb2_ea_info, name) +
4675 name_len + 1 + value_len;
4676
4677 /* align next xattr entry at 4 byte bundary */
4678 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4679 if (alignment_bytes) {
4680 memset(ptr, '\0', alignment_bytes);
4681 ptr += alignment_bytes;
4682 next_offset += alignment_bytes;
4683 buf_free_len -= alignment_bytes;
4684 }
4685 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4686 prev_eainfo = eainfo;
4687 eainfo = (struct smb2_ea_info *)ptr;
4688 rsp_data_cnt += next_offset;
4689
4690 if (req->InputBufferLength) {
4691 ksmbd_debug(SMB, "single entry requested\n");
4692 break;
4693 }
4694 }
4695
4696 /* no more ea entries */
4697 prev_eainfo->NextEntryOffset = 0;
4698 done:
4699 rc = 0;
4700 if (rsp_data_cnt == 0)
4701 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4702 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4703 out:
4704 kvfree(xattr_list);
4705 return rc;
4706 }
4707
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4708 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4709 struct ksmbd_file *fp, void *rsp_org)
4710 {
4711 struct smb2_file_access_info *file_info;
4712
4713 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4714 file_info->AccessFlags = fp->daccess;
4715 rsp->OutputBufferLength =
4716 cpu_to_le32(sizeof(struct smb2_file_access_info));
4717 }
4718
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4719 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4720 struct ksmbd_file *fp, void *rsp_org)
4721 {
4722 struct smb2_file_basic_info *basic_info;
4723 struct kstat stat;
4724 u64 time;
4725 int ret;
4726
4727 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4728 pr_err("no right to read the attributes : 0x%x\n",
4729 fp->daccess);
4730 return -EACCES;
4731 }
4732
4733 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4734 AT_STATX_SYNC_AS_STAT);
4735 if (ret)
4736 return ret;
4737
4738 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4739 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4740 time = ksmbd_UnixTimeToNT(stat.atime);
4741 basic_info->LastAccessTime = cpu_to_le64(time);
4742 time = ksmbd_UnixTimeToNT(stat.mtime);
4743 basic_info->LastWriteTime = cpu_to_le64(time);
4744 time = ksmbd_UnixTimeToNT(stat.ctime);
4745 basic_info->ChangeTime = cpu_to_le64(time);
4746 basic_info->Attributes = fp->f_ci->m_fattr;
4747 basic_info->Pad1 = 0;
4748 rsp->OutputBufferLength =
4749 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4750 return 0;
4751 }
4752
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4753 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4754 struct ksmbd_file *fp, void *rsp_org)
4755 {
4756 struct smb2_file_standard_info *sinfo;
4757 unsigned int delete_pending;
4758 struct kstat stat;
4759 int ret;
4760
4761 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4762 AT_STATX_SYNC_AS_STAT);
4763 if (ret)
4764 return ret;
4765
4766 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4767 delete_pending = ksmbd_inode_pending_delete(fp);
4768
4769 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4770 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4771 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4772 sinfo->DeletePending = delete_pending;
4773 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4774 rsp->OutputBufferLength =
4775 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4776
4777 return 0;
4778 }
4779
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4780 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4781 void *rsp_org)
4782 {
4783 struct smb2_file_alignment_info *file_info;
4784
4785 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4786 file_info->AlignmentRequirement = 0;
4787 rsp->OutputBufferLength =
4788 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4789 }
4790
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4791 static int get_file_all_info(struct ksmbd_work *work,
4792 struct smb2_query_info_rsp *rsp,
4793 struct ksmbd_file *fp,
4794 void *rsp_org)
4795 {
4796 struct ksmbd_conn *conn = work->conn;
4797 struct smb2_file_all_info *file_info;
4798 unsigned int delete_pending;
4799 struct kstat stat;
4800 int conv_len;
4801 char *filename;
4802 u64 time;
4803 int ret;
4804
4805 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4806 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4807 fp->daccess);
4808 return -EACCES;
4809 }
4810
4811 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4812 if (IS_ERR(filename))
4813 return PTR_ERR(filename);
4814
4815 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4816 AT_STATX_SYNC_AS_STAT);
4817 if (ret)
4818 return ret;
4819
4820 ksmbd_debug(SMB, "filename = %s\n", filename);
4821 delete_pending = ksmbd_inode_pending_delete(fp);
4822 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4823
4824 file_info->CreationTime = cpu_to_le64(fp->create_time);
4825 time = ksmbd_UnixTimeToNT(stat.atime);
4826 file_info->LastAccessTime = cpu_to_le64(time);
4827 time = ksmbd_UnixTimeToNT(stat.mtime);
4828 file_info->LastWriteTime = cpu_to_le64(time);
4829 time = ksmbd_UnixTimeToNT(stat.ctime);
4830 file_info->ChangeTime = cpu_to_le64(time);
4831 file_info->Attributes = fp->f_ci->m_fattr;
4832 file_info->Pad1 = 0;
4833 file_info->AllocationSize =
4834 cpu_to_le64(stat.blocks << 9);
4835 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4836 file_info->NumberOfLinks =
4837 cpu_to_le32(get_nlink(&stat) - delete_pending);
4838 file_info->DeletePending = delete_pending;
4839 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4840 file_info->Pad2 = 0;
4841 file_info->IndexNumber = cpu_to_le64(stat.ino);
4842 file_info->EASize = 0;
4843 file_info->AccessFlags = fp->daccess;
4844 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4845 file_info->Mode = fp->coption;
4846 file_info->AlignmentRequirement = 0;
4847 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4848 PATH_MAX, conn->local_nls, 0);
4849 conv_len *= 2;
4850 file_info->FileNameLength = cpu_to_le32(conv_len);
4851 rsp->OutputBufferLength =
4852 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4853 kfree(filename);
4854 return 0;
4855 }
4856
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4857 static void get_file_alternate_info(struct ksmbd_work *work,
4858 struct smb2_query_info_rsp *rsp,
4859 struct ksmbd_file *fp,
4860 void *rsp_org)
4861 {
4862 struct ksmbd_conn *conn = work->conn;
4863 struct smb2_file_alt_name_info *file_info;
4864 struct dentry *dentry = fp->filp->f_path.dentry;
4865 int conv_len;
4866
4867 spin_lock(&dentry->d_lock);
4868 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4869 conv_len = ksmbd_extract_shortname(conn,
4870 dentry->d_name.name,
4871 file_info->FileName);
4872 spin_unlock(&dentry->d_lock);
4873 file_info->FileNameLength = cpu_to_le32(conv_len);
4874 rsp->OutputBufferLength =
4875 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4876 }
4877
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4878 static int get_file_stream_info(struct ksmbd_work *work,
4879 struct smb2_query_info_rsp *rsp,
4880 struct ksmbd_file *fp,
4881 void *rsp_org)
4882 {
4883 struct ksmbd_conn *conn = work->conn;
4884 struct smb2_file_stream_info *file_info;
4885 char *stream_name, *xattr_list = NULL, *stream_buf;
4886 struct kstat stat;
4887 const struct path *path = &fp->filp->f_path;
4888 ssize_t xattr_list_len;
4889 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4890 int buf_free_len;
4891 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4892 int ret;
4893
4894 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4895 AT_STATX_SYNC_AS_STAT);
4896 if (ret)
4897 return ret;
4898
4899 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4900
4901 buf_free_len =
4902 smb2_calc_max_out_buf_len(work, 8,
4903 le32_to_cpu(req->OutputBufferLength));
4904 if (buf_free_len < 0)
4905 goto out;
4906
4907 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4908 if (xattr_list_len < 0) {
4909 goto out;
4910 } else if (!xattr_list_len) {
4911 ksmbd_debug(SMB, "empty xattr in the file\n");
4912 goto out;
4913 }
4914
4915 while (idx < xattr_list_len) {
4916 stream_name = xattr_list + idx;
4917 streamlen = strlen(stream_name);
4918 idx += streamlen + 1;
4919
4920 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4921
4922 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4923 STREAM_PREFIX, STREAM_PREFIX_LEN))
4924 continue;
4925
4926 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4927 STREAM_PREFIX_LEN);
4928 streamlen = stream_name_len;
4929
4930 /* plus : size */
4931 streamlen += 1;
4932 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4933 if (!stream_buf)
4934 break;
4935
4936 streamlen = snprintf(stream_buf, streamlen + 1,
4937 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4938
4939 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4940 if (next > buf_free_len) {
4941 kfree(stream_buf);
4942 break;
4943 }
4944
4945 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4946 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4947 stream_buf, streamlen,
4948 conn->local_nls, 0);
4949 streamlen *= 2;
4950 kfree(stream_buf);
4951 file_info->StreamNameLength = cpu_to_le32(streamlen);
4952 file_info->StreamSize = cpu_to_le64(stream_name_len);
4953 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4954
4955 nbytes += next;
4956 buf_free_len -= next;
4957 file_info->NextEntryOffset = cpu_to_le32(next);
4958 }
4959
4960 out:
4961 if (!S_ISDIR(stat.mode) &&
4962 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4963 file_info = (struct smb2_file_stream_info *)
4964 &rsp->Buffer[nbytes];
4965 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4966 "::$DATA", 7, conn->local_nls, 0);
4967 streamlen *= 2;
4968 file_info->StreamNameLength = cpu_to_le32(streamlen);
4969 file_info->StreamSize = cpu_to_le64(stat.size);
4970 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4971 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4972 }
4973
4974 /* last entry offset should be 0 */
4975 file_info->NextEntryOffset = 0;
4976 kvfree(xattr_list);
4977
4978 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4979
4980 return 0;
4981 }
4982
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4983 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
4984 struct ksmbd_file *fp, void *rsp_org)
4985 {
4986 struct smb2_file_internal_info *file_info;
4987 struct kstat stat;
4988 int ret;
4989
4990 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4991 AT_STATX_SYNC_AS_STAT);
4992 if (ret)
4993 return ret;
4994
4995 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4996 file_info->IndexNumber = cpu_to_le64(stat.ino);
4997 rsp->OutputBufferLength =
4998 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4999
5000 return 0;
5001 }
5002
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5003 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5004 struct ksmbd_file *fp, void *rsp_org)
5005 {
5006 struct smb2_file_ntwrk_info *file_info;
5007 struct kstat stat;
5008 u64 time;
5009 int ret;
5010
5011 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5012 pr_err("no right to read the attributes : 0x%x\n",
5013 fp->daccess);
5014 return -EACCES;
5015 }
5016
5017 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5018 AT_STATX_SYNC_AS_STAT);
5019 if (ret)
5020 return ret;
5021
5022 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5023
5024 file_info->CreationTime = cpu_to_le64(fp->create_time);
5025 time = ksmbd_UnixTimeToNT(stat.atime);
5026 file_info->LastAccessTime = cpu_to_le64(time);
5027 time = ksmbd_UnixTimeToNT(stat.mtime);
5028 file_info->LastWriteTime = cpu_to_le64(time);
5029 time = ksmbd_UnixTimeToNT(stat.ctime);
5030 file_info->ChangeTime = cpu_to_le64(time);
5031 file_info->Attributes = fp->f_ci->m_fattr;
5032 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5033 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5034 file_info->Reserved = cpu_to_le32(0);
5035 rsp->OutputBufferLength =
5036 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5037 return 0;
5038 }
5039
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)5040 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5041 {
5042 struct smb2_file_ea_info *file_info;
5043
5044 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5045 file_info->EASize = 0;
5046 rsp->OutputBufferLength =
5047 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5048 }
5049
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5050 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5051 struct ksmbd_file *fp, void *rsp_org)
5052 {
5053 struct smb2_file_pos_info *file_info;
5054
5055 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5056 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5057 rsp->OutputBufferLength =
5058 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5059 }
5060
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5061 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5062 struct ksmbd_file *fp, void *rsp_org)
5063 {
5064 struct smb2_file_mode_info *file_info;
5065
5066 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5067 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5068 rsp->OutputBufferLength =
5069 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5070 }
5071
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5072 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5073 struct ksmbd_file *fp, void *rsp_org)
5074 {
5075 struct smb2_file_comp_info *file_info;
5076 struct kstat stat;
5077 int ret;
5078
5079 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5080 AT_STATX_SYNC_AS_STAT);
5081 if (ret)
5082 return ret;
5083
5084 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5085 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5086 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5087 file_info->CompressionUnitShift = 0;
5088 file_info->ChunkShift = 0;
5089 file_info->ClusterShift = 0;
5090 memset(&file_info->Reserved[0], 0, 3);
5091
5092 rsp->OutputBufferLength =
5093 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5094
5095 return 0;
5096 }
5097
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5098 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5099 struct ksmbd_file *fp, void *rsp_org)
5100 {
5101 struct smb2_file_attr_tag_info *file_info;
5102
5103 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5104 pr_err("no right to read the attributes : 0x%x\n",
5105 fp->daccess);
5106 return -EACCES;
5107 }
5108
5109 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5110 file_info->FileAttributes = fp->f_ci->m_fattr;
5111 file_info->ReparseTag = 0;
5112 rsp->OutputBufferLength =
5113 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5114 return 0;
5115 }
5116
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5117 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5118 struct ksmbd_file *fp, void *rsp_org)
5119 {
5120 struct smb311_posix_qinfo *file_info;
5121 struct inode *inode = file_inode(fp->filp);
5122 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5123 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5124 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5125 struct kstat stat;
5126 u64 time;
5127 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5128 int ret;
5129
5130 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5131 AT_STATX_SYNC_AS_STAT);
5132 if (ret)
5133 return ret;
5134
5135 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5136 file_info->CreationTime = cpu_to_le64(fp->create_time);
5137 time = ksmbd_UnixTimeToNT(stat.atime);
5138 file_info->LastAccessTime = cpu_to_le64(time);
5139 time = ksmbd_UnixTimeToNT(stat.mtime);
5140 file_info->LastWriteTime = cpu_to_le64(time);
5141 time = ksmbd_UnixTimeToNT(stat.ctime);
5142 file_info->ChangeTime = cpu_to_le64(time);
5143 file_info->DosAttributes = fp->f_ci->m_fattr;
5144 file_info->Inode = cpu_to_le64(stat.ino);
5145 file_info->EndOfFile = cpu_to_le64(stat.size);
5146 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5147 file_info->HardLinks = cpu_to_le32(stat.nlink);
5148 file_info->Mode = cpu_to_le32(stat.mode & 0777);
5149 file_info->DeviceId = cpu_to_le32(stat.rdev);
5150
5151 /*
5152 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5153 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5154 * sub_auth(4 * 1(num_subauth)) + RID(4).
5155 */
5156 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5157 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5158 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5159 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5160
5161 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5162
5163 return 0;
5164 }
5165
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5166 static int smb2_get_info_file(struct ksmbd_work *work,
5167 struct smb2_query_info_req *req,
5168 struct smb2_query_info_rsp *rsp)
5169 {
5170 struct ksmbd_file *fp;
5171 int fileinfoclass = 0;
5172 int rc = 0;
5173 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5174
5175 if (test_share_config_flag(work->tcon->share_conf,
5176 KSMBD_SHARE_FLAG_PIPE)) {
5177 /* smb2 info file called for pipe */
5178 return smb2_get_info_file_pipe(work->sess, req, rsp,
5179 work->response_buf);
5180 }
5181
5182 if (work->next_smb2_rcv_hdr_off) {
5183 if (!has_file_id(req->VolatileFileId)) {
5184 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5185 work->compound_fid);
5186 id = work->compound_fid;
5187 pid = work->compound_pfid;
5188 }
5189 }
5190
5191 if (!has_file_id(id)) {
5192 id = req->VolatileFileId;
5193 pid = req->PersistentFileId;
5194 }
5195
5196 fp = ksmbd_lookup_fd_slow(work, id, pid);
5197 if (!fp)
5198 return -ENOENT;
5199
5200 fileinfoclass = req->FileInfoClass;
5201
5202 switch (fileinfoclass) {
5203 case FILE_ACCESS_INFORMATION:
5204 get_file_access_info(rsp, fp, work->response_buf);
5205 break;
5206
5207 case FILE_BASIC_INFORMATION:
5208 rc = get_file_basic_info(rsp, fp, work->response_buf);
5209 break;
5210
5211 case FILE_STANDARD_INFORMATION:
5212 rc = get_file_standard_info(rsp, fp, work->response_buf);
5213 break;
5214
5215 case FILE_ALIGNMENT_INFORMATION:
5216 get_file_alignment_info(rsp, work->response_buf);
5217 break;
5218
5219 case FILE_ALL_INFORMATION:
5220 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5221 break;
5222
5223 case FILE_ALTERNATE_NAME_INFORMATION:
5224 get_file_alternate_info(work, rsp, fp, work->response_buf);
5225 break;
5226
5227 case FILE_STREAM_INFORMATION:
5228 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5229 break;
5230
5231 case FILE_INTERNAL_INFORMATION:
5232 rc = get_file_internal_info(rsp, fp, work->response_buf);
5233 break;
5234
5235 case FILE_NETWORK_OPEN_INFORMATION:
5236 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5237 break;
5238
5239 case FILE_EA_INFORMATION:
5240 get_file_ea_info(rsp, work->response_buf);
5241 break;
5242
5243 case FILE_FULL_EA_INFORMATION:
5244 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5245 break;
5246
5247 case FILE_POSITION_INFORMATION:
5248 get_file_position_info(rsp, fp, work->response_buf);
5249 break;
5250
5251 case FILE_MODE_INFORMATION:
5252 get_file_mode_info(rsp, fp, work->response_buf);
5253 break;
5254
5255 case FILE_COMPRESSION_INFORMATION:
5256 rc = get_file_compression_info(rsp, fp, work->response_buf);
5257 break;
5258
5259 case FILE_ATTRIBUTE_TAG_INFORMATION:
5260 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5261 break;
5262 case SMB_FIND_FILE_POSIX_INFO:
5263 if (!work->tcon->posix_extensions) {
5264 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5265 rc = -EOPNOTSUPP;
5266 } else {
5267 rc = find_file_posix_info(rsp, fp, work->response_buf);
5268 }
5269 break;
5270 default:
5271 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5272 fileinfoclass);
5273 rc = -EOPNOTSUPP;
5274 }
5275 if (!rc)
5276 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5277 rsp, work->response_buf);
5278 ksmbd_fd_put(work, fp);
5279 return rc;
5280 }
5281
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5282 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5283 struct smb2_query_info_req *req,
5284 struct smb2_query_info_rsp *rsp)
5285 {
5286 struct ksmbd_session *sess = work->sess;
5287 struct ksmbd_conn *conn = work->conn;
5288 struct ksmbd_share_config *share = work->tcon->share_conf;
5289 int fsinfoclass = 0;
5290 struct kstatfs stfs;
5291 struct path path;
5292 int rc = 0, len;
5293
5294 if (!share->path)
5295 return -EIO;
5296
5297 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5298 if (rc) {
5299 pr_err("cannot create vfs path\n");
5300 return -EIO;
5301 }
5302
5303 rc = vfs_statfs(&path, &stfs);
5304 if (rc) {
5305 pr_err("cannot do stat of path %s\n", share->path);
5306 path_put(&path);
5307 return -EIO;
5308 }
5309
5310 fsinfoclass = req->FileInfoClass;
5311
5312 switch (fsinfoclass) {
5313 case FS_DEVICE_INFORMATION:
5314 {
5315 struct filesystem_device_info *info;
5316
5317 info = (struct filesystem_device_info *)rsp->Buffer;
5318
5319 info->DeviceType = cpu_to_le32(stfs.f_type);
5320 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5321 rsp->OutputBufferLength = cpu_to_le32(8);
5322 break;
5323 }
5324 case FS_ATTRIBUTE_INFORMATION:
5325 {
5326 struct filesystem_attribute_info *info;
5327 size_t sz;
5328
5329 info = (struct filesystem_attribute_info *)rsp->Buffer;
5330 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5331 FILE_PERSISTENT_ACLS |
5332 FILE_UNICODE_ON_DISK |
5333 FILE_CASE_PRESERVED_NAMES |
5334 FILE_CASE_SENSITIVE_SEARCH |
5335 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5336
5337 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5338
5339 if (test_share_config_flag(work->tcon->share_conf,
5340 KSMBD_SHARE_FLAG_STREAMS))
5341 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5342
5343 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5344 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5345 "NTFS", PATH_MAX, conn->local_nls, 0);
5346 len = len * 2;
5347 info->FileSystemNameLen = cpu_to_le32(len);
5348 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5349 rsp->OutputBufferLength = cpu_to_le32(sz);
5350 break;
5351 }
5352 case FS_VOLUME_INFORMATION:
5353 {
5354 struct filesystem_vol_info *info;
5355 size_t sz;
5356 unsigned int serial_crc = 0;
5357
5358 info = (struct filesystem_vol_info *)(rsp->Buffer);
5359 info->VolumeCreationTime = 0;
5360 serial_crc = crc32_le(serial_crc, share->name,
5361 strlen(share->name));
5362 serial_crc = crc32_le(serial_crc, share->path,
5363 strlen(share->path));
5364 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5365 strlen(ksmbd_netbios_name()));
5366 /* Taking dummy value of serial number*/
5367 info->SerialNumber = cpu_to_le32(serial_crc);
5368 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5369 share->name, PATH_MAX,
5370 conn->local_nls, 0);
5371 len = len * 2;
5372 info->VolumeLabelSize = cpu_to_le32(len);
5373 info->Reserved = 0;
5374 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5375 rsp->OutputBufferLength = cpu_to_le32(sz);
5376 break;
5377 }
5378 case FS_SIZE_INFORMATION:
5379 {
5380 struct filesystem_info *info;
5381
5382 info = (struct filesystem_info *)(rsp->Buffer);
5383 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5384 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5385 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5386 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5387 rsp->OutputBufferLength = cpu_to_le32(24);
5388 break;
5389 }
5390 case FS_FULL_SIZE_INFORMATION:
5391 {
5392 struct smb2_fs_full_size_info *info;
5393
5394 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5395 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5396 info->CallerAvailableAllocationUnits =
5397 cpu_to_le64(stfs.f_bavail);
5398 info->ActualAvailableAllocationUnits =
5399 cpu_to_le64(stfs.f_bfree);
5400 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5401 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5402 rsp->OutputBufferLength = cpu_to_le32(32);
5403 break;
5404 }
5405 case FS_OBJECT_ID_INFORMATION:
5406 {
5407 struct object_id_info *info;
5408
5409 info = (struct object_id_info *)(rsp->Buffer);
5410
5411 if (!user_guest(sess->user))
5412 memcpy(info->objid, user_passkey(sess->user), 16);
5413 else
5414 memset(info->objid, 0, 16);
5415
5416 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5417 info->extended_info.version = cpu_to_le32(1);
5418 info->extended_info.release = cpu_to_le32(1);
5419 info->extended_info.rel_date = 0;
5420 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5421 rsp->OutputBufferLength = cpu_to_le32(64);
5422 break;
5423 }
5424 case FS_SECTOR_SIZE_INFORMATION:
5425 {
5426 struct smb3_fs_ss_info *info;
5427 unsigned int sector_size =
5428 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5429
5430 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5431
5432 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5433 info->PhysicalBytesPerSectorForAtomicity =
5434 cpu_to_le32(sector_size);
5435 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5436 info->FSEffPhysicalBytesPerSectorForAtomicity =
5437 cpu_to_le32(sector_size);
5438 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5439 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5440 info->ByteOffsetForSectorAlignment = 0;
5441 info->ByteOffsetForPartitionAlignment = 0;
5442 rsp->OutputBufferLength = cpu_to_le32(28);
5443 break;
5444 }
5445 case FS_CONTROL_INFORMATION:
5446 {
5447 /*
5448 * TODO : The current implementation is based on
5449 * test result with win7(NTFS) server. It's need to
5450 * modify this to get valid Quota values
5451 * from Linux kernel
5452 */
5453 struct smb2_fs_control_info *info;
5454
5455 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5456 info->FreeSpaceStartFiltering = 0;
5457 info->FreeSpaceThreshold = 0;
5458 info->FreeSpaceStopFiltering = 0;
5459 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5460 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5461 info->Padding = 0;
5462 rsp->OutputBufferLength = cpu_to_le32(48);
5463 break;
5464 }
5465 case FS_POSIX_INFORMATION:
5466 {
5467 struct filesystem_posix_info *info;
5468
5469 if (!work->tcon->posix_extensions) {
5470 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5471 rc = -EOPNOTSUPP;
5472 } else {
5473 info = (struct filesystem_posix_info *)(rsp->Buffer);
5474 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5475 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5476 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5477 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5478 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5479 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5480 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5481 rsp->OutputBufferLength = cpu_to_le32(56);
5482 }
5483 break;
5484 }
5485 default:
5486 path_put(&path);
5487 return -EOPNOTSUPP;
5488 }
5489 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5490 rsp, work->response_buf);
5491 path_put(&path);
5492 return rc;
5493 }
5494
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5495 static int smb2_get_info_sec(struct ksmbd_work *work,
5496 struct smb2_query_info_req *req,
5497 struct smb2_query_info_rsp *rsp)
5498 {
5499 struct ksmbd_file *fp;
5500 struct mnt_idmap *idmap;
5501 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5502 struct smb_fattr fattr = {{0}};
5503 struct inode *inode;
5504 __u32 secdesclen = 0;
5505 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5506 int addition_info = le32_to_cpu(req->AdditionalInformation);
5507 int rc = 0, ppntsd_size = 0;
5508
5509 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5510 PROTECTED_DACL_SECINFO |
5511 UNPROTECTED_DACL_SECINFO)) {
5512 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5513 addition_info);
5514
5515 pntsd->revision = cpu_to_le16(1);
5516 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5517 pntsd->osidoffset = 0;
5518 pntsd->gsidoffset = 0;
5519 pntsd->sacloffset = 0;
5520 pntsd->dacloffset = 0;
5521
5522 secdesclen = sizeof(struct smb_ntsd);
5523 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5524
5525 return 0;
5526 }
5527
5528 if (work->next_smb2_rcv_hdr_off) {
5529 if (!has_file_id(req->VolatileFileId)) {
5530 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5531 work->compound_fid);
5532 id = work->compound_fid;
5533 pid = work->compound_pfid;
5534 }
5535 }
5536
5537 if (!has_file_id(id)) {
5538 id = req->VolatileFileId;
5539 pid = req->PersistentFileId;
5540 }
5541
5542 fp = ksmbd_lookup_fd_slow(work, id, pid);
5543 if (!fp)
5544 return -ENOENT;
5545
5546 idmap = file_mnt_idmap(fp->filp);
5547 inode = file_inode(fp->filp);
5548 ksmbd_acls_fattr(&fattr, idmap, inode);
5549
5550 if (test_share_config_flag(work->tcon->share_conf,
5551 KSMBD_SHARE_FLAG_ACL_XATTR))
5552 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5553 fp->filp->f_path.dentry,
5554 &ppntsd);
5555
5556 /* Check if sd buffer size exceeds response buffer size */
5557 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5558 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5559 addition_info, &secdesclen, &fattr);
5560 posix_acl_release(fattr.cf_acls);
5561 posix_acl_release(fattr.cf_dacls);
5562 kfree(ppntsd);
5563 ksmbd_fd_put(work, fp);
5564 if (rc)
5565 return rc;
5566
5567 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5568 return 0;
5569 }
5570
5571 /**
5572 * smb2_query_info() - handler for smb2 query info command
5573 * @work: smb work containing query info request buffer
5574 *
5575 * Return: 0 on success, otherwise error
5576 */
smb2_query_info(struct ksmbd_work * work)5577 int smb2_query_info(struct ksmbd_work *work)
5578 {
5579 struct smb2_query_info_req *req;
5580 struct smb2_query_info_rsp *rsp;
5581 int rc = 0;
5582
5583 WORK_BUFFERS(work, req, rsp);
5584
5585 ksmbd_debug(SMB, "GOT query info request\n");
5586
5587 switch (req->InfoType) {
5588 case SMB2_O_INFO_FILE:
5589 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5590 rc = smb2_get_info_file(work, req, rsp);
5591 break;
5592 case SMB2_O_INFO_FILESYSTEM:
5593 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5594 rc = smb2_get_info_filesystem(work, req, rsp);
5595 break;
5596 case SMB2_O_INFO_SECURITY:
5597 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5598 rc = smb2_get_info_sec(work, req, rsp);
5599 break;
5600 default:
5601 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5602 req->InfoType);
5603 rc = -EOPNOTSUPP;
5604 }
5605
5606 if (!rc) {
5607 rsp->StructureSize = cpu_to_le16(9);
5608 rsp->OutputBufferOffset = cpu_to_le16(72);
5609 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5610 offsetof(struct smb2_query_info_rsp, Buffer) +
5611 le32_to_cpu(rsp->OutputBufferLength));
5612 }
5613
5614 if (rc < 0) {
5615 if (rc == -EACCES)
5616 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5617 else if (rc == -ENOENT)
5618 rsp->hdr.Status = STATUS_FILE_CLOSED;
5619 else if (rc == -EIO)
5620 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5621 else if (rc == -ENOMEM)
5622 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5623 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5624 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5625 smb2_set_err_rsp(work);
5626
5627 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5628 rc);
5629 return rc;
5630 }
5631 return 0;
5632 }
5633
5634 /**
5635 * smb2_close_pipe() - handler for closing IPC pipe
5636 * @work: smb work containing close request buffer
5637 *
5638 * Return: 0
5639 */
smb2_close_pipe(struct ksmbd_work * work)5640 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5641 {
5642 u64 id;
5643 struct smb2_close_req *req;
5644 struct smb2_close_rsp *rsp;
5645
5646 WORK_BUFFERS(work, req, rsp);
5647
5648 id = req->VolatileFileId;
5649 ksmbd_session_rpc_close(work->sess, id);
5650
5651 rsp->StructureSize = cpu_to_le16(60);
5652 rsp->Flags = 0;
5653 rsp->Reserved = 0;
5654 rsp->CreationTime = 0;
5655 rsp->LastAccessTime = 0;
5656 rsp->LastWriteTime = 0;
5657 rsp->ChangeTime = 0;
5658 rsp->AllocationSize = 0;
5659 rsp->EndOfFile = 0;
5660 rsp->Attributes = 0;
5661
5662 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5663 sizeof(struct smb2_close_rsp));
5664 }
5665
5666 /**
5667 * smb2_close() - handler for smb2 close file command
5668 * @work: smb work containing close request buffer
5669 *
5670 * Return: 0
5671 */
smb2_close(struct ksmbd_work * work)5672 int smb2_close(struct ksmbd_work *work)
5673 {
5674 u64 volatile_id = KSMBD_NO_FID;
5675 u64 sess_id;
5676 struct smb2_close_req *req;
5677 struct smb2_close_rsp *rsp;
5678 struct ksmbd_conn *conn = work->conn;
5679 struct ksmbd_file *fp;
5680 u64 time;
5681 int err = 0;
5682
5683 WORK_BUFFERS(work, req, rsp);
5684
5685 if (test_share_config_flag(work->tcon->share_conf,
5686 KSMBD_SHARE_FLAG_PIPE)) {
5687 ksmbd_debug(SMB, "IPC pipe close request\n");
5688 return smb2_close_pipe(work);
5689 }
5690
5691 sess_id = le64_to_cpu(req->hdr.SessionId);
5692 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5693 sess_id = work->compound_sid;
5694
5695 work->compound_sid = 0;
5696 if (check_session_id(conn, sess_id)) {
5697 work->compound_sid = sess_id;
5698 } else {
5699 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5700 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5701 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5702 err = -EBADF;
5703 goto out;
5704 }
5705
5706 if (work->next_smb2_rcv_hdr_off &&
5707 !has_file_id(req->VolatileFileId)) {
5708 if (!has_file_id(work->compound_fid)) {
5709 /* file already closed, return FILE_CLOSED */
5710 ksmbd_debug(SMB, "file already closed\n");
5711 rsp->hdr.Status = STATUS_FILE_CLOSED;
5712 err = -EBADF;
5713 goto out;
5714 } else {
5715 ksmbd_debug(SMB,
5716 "Compound request set FID = %llu:%llu\n",
5717 work->compound_fid,
5718 work->compound_pfid);
5719 volatile_id = work->compound_fid;
5720
5721 /* file closed, stored id is not valid anymore */
5722 work->compound_fid = KSMBD_NO_FID;
5723 work->compound_pfid = KSMBD_NO_FID;
5724 }
5725 } else {
5726 volatile_id = req->VolatileFileId;
5727 }
5728 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5729
5730 rsp->StructureSize = cpu_to_le16(60);
5731 rsp->Reserved = 0;
5732
5733 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5734 struct kstat stat;
5735 int ret;
5736
5737 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5738 if (!fp) {
5739 err = -ENOENT;
5740 goto out;
5741 }
5742
5743 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5744 AT_STATX_SYNC_AS_STAT);
5745 if (ret) {
5746 ksmbd_fd_put(work, fp);
5747 goto out;
5748 }
5749
5750 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5751 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5752 cpu_to_le64(stat.blocks << 9);
5753 rsp->EndOfFile = cpu_to_le64(stat.size);
5754 rsp->Attributes = fp->f_ci->m_fattr;
5755 rsp->CreationTime = cpu_to_le64(fp->create_time);
5756 time = ksmbd_UnixTimeToNT(stat.atime);
5757 rsp->LastAccessTime = cpu_to_le64(time);
5758 time = ksmbd_UnixTimeToNT(stat.mtime);
5759 rsp->LastWriteTime = cpu_to_le64(time);
5760 time = ksmbd_UnixTimeToNT(stat.ctime);
5761 rsp->ChangeTime = cpu_to_le64(time);
5762 ksmbd_fd_put(work, fp);
5763 } else {
5764 rsp->Flags = 0;
5765 rsp->AllocationSize = 0;
5766 rsp->EndOfFile = 0;
5767 rsp->Attributes = 0;
5768 rsp->CreationTime = 0;
5769 rsp->LastAccessTime = 0;
5770 rsp->LastWriteTime = 0;
5771 rsp->ChangeTime = 0;
5772 }
5773
5774 err = ksmbd_close_fd(work, volatile_id);
5775 out:
5776 if (!err)
5777 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5778 sizeof(struct smb2_close_rsp));
5779
5780 if (err) {
5781 if (rsp->hdr.Status == 0)
5782 rsp->hdr.Status = STATUS_FILE_CLOSED;
5783 smb2_set_err_rsp(work);
5784 }
5785
5786 return err;
5787 }
5788
5789 /**
5790 * smb2_echo() - handler for smb2 echo(ping) command
5791 * @work: smb work containing echo request buffer
5792 *
5793 * Return: 0
5794 */
smb2_echo(struct ksmbd_work * work)5795 int smb2_echo(struct ksmbd_work *work)
5796 {
5797 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5798
5799 if (work->next_smb2_rcv_hdr_off)
5800 rsp = ksmbd_resp_buf_next(work);
5801
5802 rsp->StructureSize = cpu_to_le16(4);
5803 rsp->Reserved = 0;
5804 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5805 }
5806
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5807 static int smb2_rename(struct ksmbd_work *work,
5808 struct ksmbd_file *fp,
5809 struct smb2_file_rename_info *file_info,
5810 struct nls_table *local_nls)
5811 {
5812 struct ksmbd_share_config *share = fp->tcon->share_conf;
5813 char *new_name = NULL;
5814 int rc, flags = 0;
5815
5816 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5817 new_name = smb2_get_name(file_info->FileName,
5818 le32_to_cpu(file_info->FileNameLength),
5819 local_nls);
5820 if (IS_ERR(new_name))
5821 return PTR_ERR(new_name);
5822
5823 if (strchr(new_name, ':')) {
5824 int s_type;
5825 char *xattr_stream_name, *stream_name = NULL;
5826 size_t xattr_stream_size;
5827 int len;
5828
5829 rc = parse_stream_name(new_name, &stream_name, &s_type);
5830 if (rc < 0)
5831 goto out;
5832
5833 len = strlen(new_name);
5834 if (len > 0 && new_name[len - 1] != '/') {
5835 pr_err("not allow base filename in rename\n");
5836 rc = -ESHARE;
5837 goto out;
5838 }
5839
5840 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5841 &xattr_stream_name,
5842 &xattr_stream_size,
5843 s_type);
5844 if (rc)
5845 goto out;
5846
5847 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5848 &fp->filp->f_path,
5849 xattr_stream_name,
5850 NULL, 0, 0, true);
5851 if (rc < 0) {
5852 pr_err("failed to store stream name in xattr: %d\n",
5853 rc);
5854 rc = -EINVAL;
5855 goto out;
5856 }
5857
5858 goto out;
5859 }
5860
5861 ksmbd_debug(SMB, "new name %s\n", new_name);
5862 if (ksmbd_share_veto_filename(share, new_name)) {
5863 rc = -ENOENT;
5864 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5865 goto out;
5866 }
5867
5868 if (!file_info->ReplaceIfExists)
5869 flags = RENAME_NOREPLACE;
5870
5871 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5872 if (!rc)
5873 smb_break_all_levII_oplock(work, fp, 0);
5874 out:
5875 kfree(new_name);
5876 return rc;
5877 }
5878
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)5879 static int smb2_create_link(struct ksmbd_work *work,
5880 struct ksmbd_share_config *share,
5881 struct smb2_file_link_info *file_info,
5882 unsigned int buf_len, struct file *filp,
5883 struct nls_table *local_nls)
5884 {
5885 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5886 struct path path, parent_path;
5887 bool file_present = false;
5888 int rc;
5889
5890 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5891 le32_to_cpu(file_info->FileNameLength))
5892 return -EINVAL;
5893
5894 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5895 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5896 if (!pathname)
5897 return -ENOMEM;
5898
5899 link_name = smb2_get_name(file_info->FileName,
5900 le32_to_cpu(file_info->FileNameLength),
5901 local_nls);
5902 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5903 rc = -EINVAL;
5904 goto out;
5905 }
5906
5907 ksmbd_debug(SMB, "link name is %s\n", link_name);
5908 target_name = file_path(filp, pathname, PATH_MAX);
5909 if (IS_ERR(target_name)) {
5910 rc = -EINVAL;
5911 goto out;
5912 }
5913
5914 ksmbd_debug(SMB, "target name is %s\n", target_name);
5915 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5916 &parent_path, &path, 0);
5917 if (rc) {
5918 if (rc != -ENOENT)
5919 goto out;
5920 } else
5921 file_present = true;
5922
5923 if (file_info->ReplaceIfExists) {
5924 if (file_present) {
5925 rc = ksmbd_vfs_remove_file(work, &path);
5926 if (rc) {
5927 rc = -EINVAL;
5928 ksmbd_debug(SMB, "cannot delete %s\n",
5929 link_name);
5930 goto out;
5931 }
5932 }
5933 } else {
5934 if (file_present) {
5935 rc = -EEXIST;
5936 ksmbd_debug(SMB, "link already exists\n");
5937 goto out;
5938 }
5939 }
5940
5941 rc = ksmbd_vfs_link(work, target_name, link_name);
5942 if (rc)
5943 rc = -EINVAL;
5944 out:
5945 if (file_present)
5946 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5947
5948 if (!IS_ERR(link_name))
5949 kfree(link_name);
5950 kfree(pathname);
5951 return rc;
5952 }
5953
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)5954 static int set_file_basic_info(struct ksmbd_file *fp,
5955 struct smb2_file_basic_info *file_info,
5956 struct ksmbd_share_config *share)
5957 {
5958 struct iattr attrs;
5959 struct file *filp;
5960 struct inode *inode;
5961 struct mnt_idmap *idmap;
5962 int rc = 0;
5963
5964 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5965 return -EACCES;
5966
5967 attrs.ia_valid = 0;
5968 filp = fp->filp;
5969 inode = file_inode(filp);
5970 idmap = file_mnt_idmap(filp);
5971
5972 if (file_info->CreationTime)
5973 fp->create_time = le64_to_cpu(file_info->CreationTime);
5974
5975 if (file_info->LastAccessTime) {
5976 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5977 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5978 }
5979
5980 attrs.ia_valid |= ATTR_CTIME;
5981 if (file_info->ChangeTime)
5982 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5983 else
5984 attrs.ia_ctime = inode_get_ctime(inode);
5985
5986 if (file_info->LastWriteTime) {
5987 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5988 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5989 }
5990
5991 if (file_info->Attributes) {
5992 if (!S_ISDIR(inode->i_mode) &&
5993 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5994 pr_err("can't change a file to a directory\n");
5995 return -EINVAL;
5996 }
5997
5998 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5999 fp->f_ci->m_fattr = file_info->Attributes |
6000 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6001 }
6002
6003 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6004 (file_info->CreationTime || file_info->Attributes)) {
6005 struct xattr_dos_attrib da = {0};
6006
6007 da.version = 4;
6008 da.itime = fp->itime;
6009 da.create_time = fp->create_time;
6010 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6011 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6012 XATTR_DOSINFO_ITIME;
6013
6014 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6015 true);
6016 if (rc)
6017 ksmbd_debug(SMB,
6018 "failed to restore file attribute in EA\n");
6019 rc = 0;
6020 }
6021
6022 if (attrs.ia_valid) {
6023 struct dentry *dentry = filp->f_path.dentry;
6024 struct inode *inode = d_inode(dentry);
6025
6026 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6027 return -EACCES;
6028
6029 inode_lock(inode);
6030 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
6031 attrs.ia_valid &= ~ATTR_CTIME;
6032 rc = notify_change(idmap, dentry, &attrs, NULL);
6033 inode_unlock(inode);
6034 }
6035 return rc;
6036 }
6037
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)6038 static int set_file_allocation_info(struct ksmbd_work *work,
6039 struct ksmbd_file *fp,
6040 struct smb2_file_alloc_info *file_alloc_info)
6041 {
6042 /*
6043 * TODO : It's working fine only when store dos attributes
6044 * is not yes. need to implement a logic which works
6045 * properly with any smb.conf option
6046 */
6047
6048 loff_t alloc_blks;
6049 struct inode *inode;
6050 struct kstat stat;
6051 int rc;
6052
6053 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6054 return -EACCES;
6055
6056 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6057 AT_STATX_SYNC_AS_STAT);
6058 if (rc)
6059 return rc;
6060
6061 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6062 inode = file_inode(fp->filp);
6063
6064 if (alloc_blks > stat.blocks) {
6065 smb_break_all_levII_oplock(work, fp, 1);
6066 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6067 alloc_blks * 512);
6068 if (rc && rc != -EOPNOTSUPP) {
6069 pr_err("vfs_fallocate is failed : %d\n", rc);
6070 return rc;
6071 }
6072 } else if (alloc_blks < stat.blocks) {
6073 loff_t size;
6074
6075 /*
6076 * Allocation size could be smaller than original one
6077 * which means allocated blocks in file should be
6078 * deallocated. use truncate to cut out it, but inode
6079 * size is also updated with truncate offset.
6080 * inode size is retained by backup inode size.
6081 */
6082 size = i_size_read(inode);
6083 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6084 if (rc) {
6085 pr_err("truncate failed!, err %d\n", rc);
6086 return rc;
6087 }
6088 if (size < alloc_blks * 512)
6089 i_size_write(inode, size);
6090 }
6091 return 0;
6092 }
6093
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)6094 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6095 struct smb2_file_eof_info *file_eof_info)
6096 {
6097 loff_t newsize;
6098 struct inode *inode;
6099 int rc;
6100
6101 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6102 return -EACCES;
6103
6104 newsize = le64_to_cpu(file_eof_info->EndOfFile);
6105 inode = file_inode(fp->filp);
6106
6107 /*
6108 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6109 * on FAT32 shared device, truncate execution time is too long
6110 * and network error could cause from windows client. because
6111 * truncate of some filesystem like FAT32 fill zero data in
6112 * truncated range.
6113 */
6114 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6115 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6116 rc = ksmbd_vfs_truncate(work, fp, newsize);
6117 if (rc) {
6118 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6119 if (rc != -EAGAIN)
6120 rc = -EBADF;
6121 return rc;
6122 }
6123 }
6124 return 0;
6125 }
6126
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)6127 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6128 struct smb2_file_rename_info *rename_info,
6129 unsigned int buf_len)
6130 {
6131 if (!(fp->daccess & FILE_DELETE_LE)) {
6132 pr_err("no right to delete : 0x%x\n", fp->daccess);
6133 return -EACCES;
6134 }
6135
6136 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6137 le32_to_cpu(rename_info->FileNameLength))
6138 return -EINVAL;
6139
6140 if (!le32_to_cpu(rename_info->FileNameLength))
6141 return -EINVAL;
6142
6143 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6144 }
6145
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)6146 static int set_file_disposition_info(struct ksmbd_file *fp,
6147 struct smb2_file_disposition_info *file_info)
6148 {
6149 struct inode *inode;
6150
6151 if (!(fp->daccess & FILE_DELETE_LE)) {
6152 pr_err("no right to delete : 0x%x\n", fp->daccess);
6153 return -EACCES;
6154 }
6155
6156 inode = file_inode(fp->filp);
6157 if (file_info->DeletePending) {
6158 if (S_ISDIR(inode->i_mode) &&
6159 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6160 return -EBUSY;
6161 ksmbd_set_inode_pending_delete(fp);
6162 } else {
6163 ksmbd_clear_inode_pending_delete(fp);
6164 }
6165 return 0;
6166 }
6167
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)6168 static int set_file_position_info(struct ksmbd_file *fp,
6169 struct smb2_file_pos_info *file_info)
6170 {
6171 loff_t current_byte_offset;
6172 unsigned long sector_size;
6173 struct inode *inode;
6174
6175 inode = file_inode(fp->filp);
6176 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6177 sector_size = inode->i_sb->s_blocksize;
6178
6179 if (current_byte_offset < 0 ||
6180 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6181 current_byte_offset & (sector_size - 1))) {
6182 pr_err("CurrentByteOffset is not valid : %llu\n",
6183 current_byte_offset);
6184 return -EINVAL;
6185 }
6186
6187 fp->filp->f_pos = current_byte_offset;
6188 return 0;
6189 }
6190
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)6191 static int set_file_mode_info(struct ksmbd_file *fp,
6192 struct smb2_file_mode_info *file_info)
6193 {
6194 __le32 mode;
6195
6196 mode = file_info->Mode;
6197
6198 if ((mode & ~FILE_MODE_INFO_MASK)) {
6199 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6200 return -EINVAL;
6201 }
6202
6203 /*
6204 * TODO : need to implement consideration for
6205 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6206 */
6207 ksmbd_vfs_set_fadvise(fp->filp, mode);
6208 fp->coption = mode;
6209 return 0;
6210 }
6211
6212 /**
6213 * smb2_set_info_file() - handler for smb2 set info command
6214 * @work: smb work containing set info command buffer
6215 * @fp: ksmbd_file pointer
6216 * @req: request buffer pointer
6217 * @share: ksmbd_share_config pointer
6218 *
6219 * Return: 0 on success, otherwise error
6220 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6221 */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)6222 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6223 struct smb2_set_info_req *req,
6224 struct ksmbd_share_config *share)
6225 {
6226 unsigned int buf_len = le32_to_cpu(req->BufferLength);
6227 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6228
6229 switch (req->FileInfoClass) {
6230 case FILE_BASIC_INFORMATION:
6231 {
6232 if (buf_len < sizeof(struct smb2_file_basic_info))
6233 return -EINVAL;
6234
6235 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6236 }
6237 case FILE_ALLOCATION_INFORMATION:
6238 {
6239 if (buf_len < sizeof(struct smb2_file_alloc_info))
6240 return -EINVAL;
6241
6242 return set_file_allocation_info(work, fp,
6243 (struct smb2_file_alloc_info *)buffer);
6244 }
6245 case FILE_END_OF_FILE_INFORMATION:
6246 {
6247 if (buf_len < sizeof(struct smb2_file_eof_info))
6248 return -EINVAL;
6249
6250 return set_end_of_file_info(work, fp,
6251 (struct smb2_file_eof_info *)buffer);
6252 }
6253 case FILE_RENAME_INFORMATION:
6254 {
6255 if (buf_len < sizeof(struct smb2_file_rename_info))
6256 return -EINVAL;
6257
6258 return set_rename_info(work, fp,
6259 (struct smb2_file_rename_info *)buffer,
6260 buf_len);
6261 }
6262 case FILE_LINK_INFORMATION:
6263 {
6264 if (buf_len < sizeof(struct smb2_file_link_info))
6265 return -EINVAL;
6266
6267 return smb2_create_link(work, work->tcon->share_conf,
6268 (struct smb2_file_link_info *)buffer,
6269 buf_len, fp->filp,
6270 work->conn->local_nls);
6271 }
6272 case FILE_DISPOSITION_INFORMATION:
6273 {
6274 if (buf_len < sizeof(struct smb2_file_disposition_info))
6275 return -EINVAL;
6276
6277 return set_file_disposition_info(fp,
6278 (struct smb2_file_disposition_info *)buffer);
6279 }
6280 case FILE_FULL_EA_INFORMATION:
6281 {
6282 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6283 pr_err("Not permitted to write ext attr: 0x%x\n",
6284 fp->daccess);
6285 return -EACCES;
6286 }
6287
6288 if (buf_len < sizeof(struct smb2_ea_info))
6289 return -EINVAL;
6290
6291 return smb2_set_ea((struct smb2_ea_info *)buffer,
6292 buf_len, &fp->filp->f_path, true);
6293 }
6294 case FILE_POSITION_INFORMATION:
6295 {
6296 if (buf_len < sizeof(struct smb2_file_pos_info))
6297 return -EINVAL;
6298
6299 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6300 }
6301 case FILE_MODE_INFORMATION:
6302 {
6303 if (buf_len < sizeof(struct smb2_file_mode_info))
6304 return -EINVAL;
6305
6306 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6307 }
6308 }
6309
6310 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6311 return -EOPNOTSUPP;
6312 }
6313
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6314 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6315 char *buffer, int buf_len)
6316 {
6317 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6318
6319 fp->saccess |= FILE_SHARE_DELETE_LE;
6320
6321 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6322 buf_len, false, true);
6323 }
6324
6325 /**
6326 * smb2_set_info() - handler for smb2 set info command handler
6327 * @work: smb work containing set info request buffer
6328 *
6329 * Return: 0 on success, otherwise error
6330 */
smb2_set_info(struct ksmbd_work * work)6331 int smb2_set_info(struct ksmbd_work *work)
6332 {
6333 struct smb2_set_info_req *req;
6334 struct smb2_set_info_rsp *rsp;
6335 struct ksmbd_file *fp = NULL;
6336 int rc = 0;
6337 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6338
6339 ksmbd_debug(SMB, "Received set info request\n");
6340
6341 if (work->next_smb2_rcv_hdr_off) {
6342 req = ksmbd_req_buf_next(work);
6343 rsp = ksmbd_resp_buf_next(work);
6344 if (!has_file_id(req->VolatileFileId)) {
6345 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6346 work->compound_fid);
6347 id = work->compound_fid;
6348 pid = work->compound_pfid;
6349 }
6350 } else {
6351 req = smb2_get_msg(work->request_buf);
6352 rsp = smb2_get_msg(work->response_buf);
6353 }
6354
6355 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6356 ksmbd_debug(SMB, "User does not have write permission\n");
6357 pr_err("User does not have write permission\n");
6358 rc = -EACCES;
6359 goto err_out;
6360 }
6361
6362 if (!has_file_id(id)) {
6363 id = req->VolatileFileId;
6364 pid = req->PersistentFileId;
6365 }
6366
6367 fp = ksmbd_lookup_fd_slow(work, id, pid);
6368 if (!fp) {
6369 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6370 rc = -ENOENT;
6371 goto err_out;
6372 }
6373
6374 switch (req->InfoType) {
6375 case SMB2_O_INFO_FILE:
6376 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6377 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6378 break;
6379 case SMB2_O_INFO_SECURITY:
6380 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6381 if (ksmbd_override_fsids(work)) {
6382 rc = -ENOMEM;
6383 goto err_out;
6384 }
6385 rc = smb2_set_info_sec(fp,
6386 le32_to_cpu(req->AdditionalInformation),
6387 (char *)req + le16_to_cpu(req->BufferOffset),
6388 le32_to_cpu(req->BufferLength));
6389 ksmbd_revert_fsids(work);
6390 break;
6391 default:
6392 rc = -EOPNOTSUPP;
6393 }
6394
6395 if (rc < 0)
6396 goto err_out;
6397
6398 rsp->StructureSize = cpu_to_le16(2);
6399 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6400 sizeof(struct smb2_set_info_rsp));
6401 if (rc)
6402 goto err_out;
6403 ksmbd_fd_put(work, fp);
6404 return 0;
6405
6406 err_out:
6407 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6408 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6409 else if (rc == -EINVAL)
6410 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6411 else if (rc == -ESHARE)
6412 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6413 else if (rc == -ENOENT)
6414 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6415 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6416 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6417 else if (rc == -EAGAIN)
6418 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6419 else if (rc == -EBADF || rc == -ESTALE)
6420 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6421 else if (rc == -EEXIST)
6422 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6423 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6424 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6425 smb2_set_err_rsp(work);
6426 ksmbd_fd_put(work, fp);
6427 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6428 return rc;
6429 }
6430
6431 /**
6432 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6433 * @work: smb work containing read IPC pipe command buffer
6434 *
6435 * Return: 0 on success, otherwise error
6436 */
smb2_read_pipe(struct ksmbd_work * work)6437 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6438 {
6439 int nbytes = 0, err;
6440 u64 id;
6441 struct ksmbd_rpc_command *rpc_resp;
6442 struct smb2_read_req *req;
6443 struct smb2_read_rsp *rsp;
6444
6445 WORK_BUFFERS(work, req, rsp);
6446
6447 id = req->VolatileFileId;
6448
6449 rpc_resp = ksmbd_rpc_read(work->sess, id);
6450 if (rpc_resp) {
6451 void *aux_payload_buf;
6452
6453 if (rpc_resp->flags != KSMBD_RPC_OK) {
6454 err = -EINVAL;
6455 goto out;
6456 }
6457
6458 aux_payload_buf =
6459 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6460 if (!aux_payload_buf) {
6461 err = -ENOMEM;
6462 goto out;
6463 }
6464
6465 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6466
6467 nbytes = rpc_resp->payload_sz;
6468 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6469 offsetof(struct smb2_read_rsp, Buffer),
6470 aux_payload_buf, nbytes);
6471 if (err) {
6472 kvfree(aux_payload_buf);
6473 goto out;
6474 }
6475 kvfree(rpc_resp);
6476 } else {
6477 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6478 offsetof(struct smb2_read_rsp, Buffer));
6479 if (err)
6480 goto out;
6481 }
6482
6483 rsp->StructureSize = cpu_to_le16(17);
6484 rsp->DataOffset = 80;
6485 rsp->Reserved = 0;
6486 rsp->DataLength = cpu_to_le32(nbytes);
6487 rsp->DataRemaining = 0;
6488 rsp->Flags = 0;
6489 return 0;
6490
6491 out:
6492 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6493 smb2_set_err_rsp(work);
6494 kvfree(rpc_resp);
6495 return err;
6496 }
6497
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6498 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6499 struct smb2_buffer_desc_v1 *desc,
6500 __le32 Channel,
6501 __le16 ChannelInfoLength)
6502 {
6503 unsigned int i, ch_count;
6504
6505 if (work->conn->dialect == SMB30_PROT_ID &&
6506 Channel != SMB2_CHANNEL_RDMA_V1)
6507 return -EINVAL;
6508
6509 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6510 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6511 for (i = 0; i < ch_count; i++) {
6512 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6513 i,
6514 le32_to_cpu(desc[i].token),
6515 le32_to_cpu(desc[i].length));
6516 }
6517 }
6518 if (!ch_count)
6519 return -EINVAL;
6520
6521 work->need_invalidate_rkey =
6522 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6523 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6524 work->remote_key = le32_to_cpu(desc->token);
6525 return 0;
6526 }
6527
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6528 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6529 struct smb2_read_req *req, void *data_buf,
6530 size_t length)
6531 {
6532 int err;
6533
6534 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6535 (struct smb2_buffer_desc_v1 *)
6536 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6537 le16_to_cpu(req->ReadChannelInfoLength));
6538 if (err)
6539 return err;
6540
6541 return length;
6542 }
6543
6544 /**
6545 * smb2_read() - handler for smb2 read from file
6546 * @work: smb work containing read command buffer
6547 *
6548 * Return: 0 on success, otherwise error
6549 */
smb2_read(struct ksmbd_work * work)6550 int smb2_read(struct ksmbd_work *work)
6551 {
6552 struct ksmbd_conn *conn = work->conn;
6553 struct smb2_read_req *req;
6554 struct smb2_read_rsp *rsp;
6555 struct ksmbd_file *fp = NULL;
6556 loff_t offset;
6557 size_t length, mincount;
6558 ssize_t nbytes = 0, remain_bytes = 0;
6559 int err = 0;
6560 bool is_rdma_channel = false;
6561 unsigned int max_read_size = conn->vals->max_read_size;
6562 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6563 void *aux_payload_buf;
6564
6565 if (test_share_config_flag(work->tcon->share_conf,
6566 KSMBD_SHARE_FLAG_PIPE)) {
6567 ksmbd_debug(SMB, "IPC pipe read request\n");
6568 return smb2_read_pipe(work);
6569 }
6570
6571 if (work->next_smb2_rcv_hdr_off) {
6572 req = ksmbd_req_buf_next(work);
6573 rsp = ksmbd_resp_buf_next(work);
6574 if (!has_file_id(req->VolatileFileId)) {
6575 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6576 work->compound_fid);
6577 id = work->compound_fid;
6578 pid = work->compound_pfid;
6579 }
6580 } else {
6581 req = smb2_get_msg(work->request_buf);
6582 rsp = smb2_get_msg(work->response_buf);
6583 }
6584
6585 if (!has_file_id(id)) {
6586 id = req->VolatileFileId;
6587 pid = req->PersistentFileId;
6588 }
6589
6590 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6591 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6592 is_rdma_channel = true;
6593 max_read_size = get_smbd_max_read_write_size();
6594 }
6595
6596 if (is_rdma_channel == true) {
6597 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6598
6599 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6600 err = -EINVAL;
6601 goto out;
6602 }
6603 err = smb2_set_remote_key_for_rdma(work,
6604 (struct smb2_buffer_desc_v1 *)
6605 ((char *)req + ch_offset),
6606 req->Channel,
6607 req->ReadChannelInfoLength);
6608 if (err)
6609 goto out;
6610 }
6611
6612 fp = ksmbd_lookup_fd_slow(work, id, pid);
6613 if (!fp) {
6614 err = -ENOENT;
6615 goto out;
6616 }
6617
6618 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6619 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6620 err = -EACCES;
6621 goto out;
6622 }
6623
6624 offset = le64_to_cpu(req->Offset);
6625 length = le32_to_cpu(req->Length);
6626 mincount = le32_to_cpu(req->MinimumCount);
6627
6628 if (length > max_read_size) {
6629 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6630 max_read_size);
6631 err = -EINVAL;
6632 goto out;
6633 }
6634
6635 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6636 fp->filp, offset, length);
6637
6638 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6639 if (!aux_payload_buf) {
6640 err = -ENOMEM;
6641 goto out;
6642 }
6643
6644 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6645 if (nbytes < 0) {
6646 err = nbytes;
6647 goto out;
6648 }
6649
6650 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6651 kvfree(aux_payload_buf);
6652 rsp->hdr.Status = STATUS_END_OF_FILE;
6653 smb2_set_err_rsp(work);
6654 ksmbd_fd_put(work, fp);
6655 return 0;
6656 }
6657
6658 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6659 nbytes, offset, mincount);
6660
6661 if (is_rdma_channel == true) {
6662 /* write data to the client using rdma channel */
6663 remain_bytes = smb2_read_rdma_channel(work, req,
6664 aux_payload_buf,
6665 nbytes);
6666 kvfree(aux_payload_buf);
6667 aux_payload_buf = NULL;
6668 nbytes = 0;
6669 if (remain_bytes < 0) {
6670 err = (int)remain_bytes;
6671 goto out;
6672 }
6673 }
6674
6675 rsp->StructureSize = cpu_to_le16(17);
6676 rsp->DataOffset = 80;
6677 rsp->Reserved = 0;
6678 rsp->DataLength = cpu_to_le32(nbytes);
6679 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6680 rsp->Flags = 0;
6681 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6682 offsetof(struct smb2_read_rsp, Buffer),
6683 aux_payload_buf, nbytes);
6684 if (err) {
6685 kvfree(aux_payload_buf);
6686 goto out;
6687 }
6688 ksmbd_fd_put(work, fp);
6689 return 0;
6690
6691 out:
6692 if (err) {
6693 if (err == -EISDIR)
6694 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6695 else if (err == -EAGAIN)
6696 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6697 else if (err == -ENOENT)
6698 rsp->hdr.Status = STATUS_FILE_CLOSED;
6699 else if (err == -EACCES)
6700 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6701 else if (err == -ESHARE)
6702 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6703 else if (err == -EINVAL)
6704 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6705 else
6706 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6707
6708 smb2_set_err_rsp(work);
6709 }
6710 ksmbd_fd_put(work, fp);
6711 return err;
6712 }
6713
6714 /**
6715 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6716 * @work: smb work containing write IPC pipe command buffer
6717 *
6718 * Return: 0 on success, otherwise error
6719 */
smb2_write_pipe(struct ksmbd_work * work)6720 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6721 {
6722 struct smb2_write_req *req;
6723 struct smb2_write_rsp *rsp;
6724 struct ksmbd_rpc_command *rpc_resp;
6725 u64 id = 0;
6726 int err = 0, ret = 0;
6727 char *data_buf;
6728 size_t length;
6729
6730 WORK_BUFFERS(work, req, rsp);
6731
6732 length = le32_to_cpu(req->Length);
6733 id = req->VolatileFileId;
6734
6735 if ((u64)le16_to_cpu(req->DataOffset) + length >
6736 get_rfc1002_len(work->request_buf)) {
6737 pr_err("invalid write data offset %u, smb_len %u\n",
6738 le16_to_cpu(req->DataOffset),
6739 get_rfc1002_len(work->request_buf));
6740 err = -EINVAL;
6741 goto out;
6742 }
6743
6744 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6745 le16_to_cpu(req->DataOffset));
6746
6747 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6748 if (rpc_resp) {
6749 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6750 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6751 kvfree(rpc_resp);
6752 smb2_set_err_rsp(work);
6753 return -EOPNOTSUPP;
6754 }
6755 if (rpc_resp->flags != KSMBD_RPC_OK) {
6756 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6757 smb2_set_err_rsp(work);
6758 kvfree(rpc_resp);
6759 return ret;
6760 }
6761 kvfree(rpc_resp);
6762 }
6763
6764 rsp->StructureSize = cpu_to_le16(17);
6765 rsp->DataOffset = 0;
6766 rsp->Reserved = 0;
6767 rsp->DataLength = cpu_to_le32(length);
6768 rsp->DataRemaining = 0;
6769 rsp->Reserved2 = 0;
6770 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6771 offsetof(struct smb2_write_rsp, Buffer));
6772 out:
6773 if (err) {
6774 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6775 smb2_set_err_rsp(work);
6776 }
6777
6778 return err;
6779 }
6780
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)6781 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6782 struct smb2_write_req *req,
6783 struct ksmbd_file *fp,
6784 loff_t offset, size_t length, bool sync)
6785 {
6786 char *data_buf;
6787 int ret;
6788 ssize_t nbytes;
6789
6790 data_buf = kvzalloc(length, GFP_KERNEL);
6791 if (!data_buf)
6792 return -ENOMEM;
6793
6794 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6795 (struct smb2_buffer_desc_v1 *)
6796 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6797 le16_to_cpu(req->WriteChannelInfoLength));
6798 if (ret < 0) {
6799 kvfree(data_buf);
6800 return ret;
6801 }
6802
6803 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6804 kvfree(data_buf);
6805 if (ret < 0)
6806 return ret;
6807
6808 return nbytes;
6809 }
6810
6811 /**
6812 * smb2_write() - handler for smb2 write from file
6813 * @work: smb work containing write command buffer
6814 *
6815 * Return: 0 on success, otherwise error
6816 */
smb2_write(struct ksmbd_work * work)6817 int smb2_write(struct ksmbd_work *work)
6818 {
6819 struct smb2_write_req *req;
6820 struct smb2_write_rsp *rsp;
6821 struct ksmbd_file *fp = NULL;
6822 loff_t offset;
6823 size_t length;
6824 ssize_t nbytes;
6825 char *data_buf;
6826 bool writethrough = false, is_rdma_channel = false;
6827 int err = 0;
6828 unsigned int max_write_size = work->conn->vals->max_write_size;
6829
6830 WORK_BUFFERS(work, req, rsp);
6831
6832 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6833 ksmbd_debug(SMB, "IPC pipe write request\n");
6834 return smb2_write_pipe(work);
6835 }
6836
6837 offset = le64_to_cpu(req->Offset);
6838 length = le32_to_cpu(req->Length);
6839
6840 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6841 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6842 is_rdma_channel = true;
6843 max_write_size = get_smbd_max_read_write_size();
6844 length = le32_to_cpu(req->RemainingBytes);
6845 }
6846
6847 if (is_rdma_channel == true) {
6848 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6849
6850 if (req->Length != 0 || req->DataOffset != 0 ||
6851 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6852 err = -EINVAL;
6853 goto out;
6854 }
6855 err = smb2_set_remote_key_for_rdma(work,
6856 (struct smb2_buffer_desc_v1 *)
6857 ((char *)req + ch_offset),
6858 req->Channel,
6859 req->WriteChannelInfoLength);
6860 if (err)
6861 goto out;
6862 }
6863
6864 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6865 ksmbd_debug(SMB, "User does not have write permission\n");
6866 err = -EACCES;
6867 goto out;
6868 }
6869
6870 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6871 if (!fp) {
6872 err = -ENOENT;
6873 goto out;
6874 }
6875
6876 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6877 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6878 err = -EACCES;
6879 goto out;
6880 }
6881
6882 if (length > max_write_size) {
6883 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6884 max_write_size);
6885 err = -EINVAL;
6886 goto out;
6887 }
6888
6889 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6890 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6891 writethrough = true;
6892
6893 if (is_rdma_channel == false) {
6894 if (le16_to_cpu(req->DataOffset) <
6895 offsetof(struct smb2_write_req, Buffer)) {
6896 err = -EINVAL;
6897 goto out;
6898 }
6899
6900 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6901 le16_to_cpu(req->DataOffset));
6902
6903 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6904 fp->filp, offset, length);
6905 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6906 writethrough, &nbytes);
6907 if (err < 0)
6908 goto out;
6909 } else {
6910 /* read data from the client using rdma channel, and
6911 * write the data.
6912 */
6913 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6914 writethrough);
6915 if (nbytes < 0) {
6916 err = (int)nbytes;
6917 goto out;
6918 }
6919 }
6920
6921 rsp->StructureSize = cpu_to_le16(17);
6922 rsp->DataOffset = 0;
6923 rsp->Reserved = 0;
6924 rsp->DataLength = cpu_to_le32(nbytes);
6925 rsp->DataRemaining = 0;
6926 rsp->Reserved2 = 0;
6927 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6928 if (err)
6929 goto out;
6930 ksmbd_fd_put(work, fp);
6931 return 0;
6932
6933 out:
6934 if (err == -EAGAIN)
6935 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6936 else if (err == -ENOSPC || err == -EFBIG)
6937 rsp->hdr.Status = STATUS_DISK_FULL;
6938 else if (err == -ENOENT)
6939 rsp->hdr.Status = STATUS_FILE_CLOSED;
6940 else if (err == -EACCES)
6941 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6942 else if (err == -ESHARE)
6943 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6944 else if (err == -EINVAL)
6945 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6946 else
6947 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6948
6949 smb2_set_err_rsp(work);
6950 ksmbd_fd_put(work, fp);
6951 return err;
6952 }
6953
6954 /**
6955 * smb2_flush() - handler for smb2 flush file - fsync
6956 * @work: smb work containing flush command buffer
6957 *
6958 * Return: 0 on success, otherwise error
6959 */
smb2_flush(struct ksmbd_work * work)6960 int smb2_flush(struct ksmbd_work *work)
6961 {
6962 struct smb2_flush_req *req;
6963 struct smb2_flush_rsp *rsp;
6964 int err;
6965
6966 WORK_BUFFERS(work, req, rsp);
6967
6968 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6969
6970 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6971 if (err)
6972 goto out;
6973
6974 rsp->StructureSize = cpu_to_le16(4);
6975 rsp->Reserved = 0;
6976 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6977
6978 out:
6979 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6980 smb2_set_err_rsp(work);
6981 return err;
6982 }
6983
6984 /**
6985 * smb2_cancel() - handler for smb2 cancel command
6986 * @work: smb work containing cancel command buffer
6987 *
6988 * Return: 0 on success, otherwise error
6989 */
smb2_cancel(struct ksmbd_work * work)6990 int smb2_cancel(struct ksmbd_work *work)
6991 {
6992 struct ksmbd_conn *conn = work->conn;
6993 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6994 struct smb2_hdr *chdr;
6995 struct ksmbd_work *iter;
6996 struct list_head *command_list;
6997
6998 if (work->next_smb2_rcv_hdr_off)
6999 hdr = ksmbd_resp_buf_next(work);
7000
7001 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7002 hdr->MessageId, hdr->Flags);
7003
7004 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7005 command_list = &conn->async_requests;
7006
7007 spin_lock(&conn->request_lock);
7008 list_for_each_entry(iter, command_list,
7009 async_request_entry) {
7010 chdr = smb2_get_msg(iter->request_buf);
7011
7012 if (iter->async_id !=
7013 le64_to_cpu(hdr->Id.AsyncId))
7014 continue;
7015
7016 ksmbd_debug(SMB,
7017 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7018 le64_to_cpu(hdr->Id.AsyncId),
7019 le16_to_cpu(chdr->Command));
7020 iter->state = KSMBD_WORK_CANCELLED;
7021 if (iter->cancel_fn)
7022 iter->cancel_fn(iter->cancel_argv);
7023 break;
7024 }
7025 spin_unlock(&conn->request_lock);
7026 } else {
7027 command_list = &conn->requests;
7028
7029 spin_lock(&conn->request_lock);
7030 list_for_each_entry(iter, command_list, request_entry) {
7031 chdr = smb2_get_msg(iter->request_buf);
7032
7033 if (chdr->MessageId != hdr->MessageId ||
7034 iter == work)
7035 continue;
7036
7037 ksmbd_debug(SMB,
7038 "smb2 with mid %llu cancelled command = 0x%x\n",
7039 le64_to_cpu(hdr->MessageId),
7040 le16_to_cpu(chdr->Command));
7041 iter->state = KSMBD_WORK_CANCELLED;
7042 break;
7043 }
7044 spin_unlock(&conn->request_lock);
7045 }
7046
7047 /* For SMB2_CANCEL command itself send no response*/
7048 work->send_no_response = 1;
7049 return 0;
7050 }
7051
smb_flock_init(struct file * f)7052 struct file_lock *smb_flock_init(struct file *f)
7053 {
7054 struct file_lock *fl;
7055
7056 fl = locks_alloc_lock();
7057 if (!fl)
7058 goto out;
7059
7060 locks_init_lock(fl);
7061
7062 fl->fl_owner = f;
7063 fl->fl_pid = current->tgid;
7064 fl->fl_file = f;
7065 fl->fl_flags = FL_POSIX;
7066 fl->fl_ops = NULL;
7067 fl->fl_lmops = NULL;
7068
7069 out:
7070 return fl;
7071 }
7072
smb2_set_flock_flags(struct file_lock * flock,int flags)7073 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7074 {
7075 int cmd = -EINVAL;
7076
7077 /* Checking for wrong flag combination during lock request*/
7078 switch (flags) {
7079 case SMB2_LOCKFLAG_SHARED:
7080 ksmbd_debug(SMB, "received shared request\n");
7081 cmd = F_SETLKW;
7082 flock->fl_type = F_RDLCK;
7083 flock->fl_flags |= FL_SLEEP;
7084 break;
7085 case SMB2_LOCKFLAG_EXCLUSIVE:
7086 ksmbd_debug(SMB, "received exclusive request\n");
7087 cmd = F_SETLKW;
7088 flock->fl_type = F_WRLCK;
7089 flock->fl_flags |= FL_SLEEP;
7090 break;
7091 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7092 ksmbd_debug(SMB,
7093 "received shared & fail immediately request\n");
7094 cmd = F_SETLK;
7095 flock->fl_type = F_RDLCK;
7096 break;
7097 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7098 ksmbd_debug(SMB,
7099 "received exclusive & fail immediately request\n");
7100 cmd = F_SETLK;
7101 flock->fl_type = F_WRLCK;
7102 break;
7103 case SMB2_LOCKFLAG_UNLOCK:
7104 ksmbd_debug(SMB, "received unlock request\n");
7105 flock->fl_type = F_UNLCK;
7106 cmd = F_SETLK;
7107 break;
7108 }
7109
7110 return cmd;
7111 }
7112
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)7113 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7114 unsigned int cmd, int flags,
7115 struct list_head *lock_list)
7116 {
7117 struct ksmbd_lock *lock;
7118
7119 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
7120 if (!lock)
7121 return NULL;
7122
7123 lock->cmd = cmd;
7124 lock->fl = flock;
7125 lock->start = flock->fl_start;
7126 lock->end = flock->fl_end;
7127 lock->flags = flags;
7128 if (lock->start == lock->end)
7129 lock->zero_len = 1;
7130 INIT_LIST_HEAD(&lock->clist);
7131 INIT_LIST_HEAD(&lock->flist);
7132 INIT_LIST_HEAD(&lock->llist);
7133 list_add_tail(&lock->llist, lock_list);
7134
7135 return lock;
7136 }
7137
smb2_remove_blocked_lock(void ** argv)7138 static void smb2_remove_blocked_lock(void **argv)
7139 {
7140 struct file_lock *flock = (struct file_lock *)argv[0];
7141
7142 ksmbd_vfs_posix_lock_unblock(flock);
7143 wake_up(&flock->fl_wait);
7144 }
7145
lock_defer_pending(struct file_lock * fl)7146 static inline bool lock_defer_pending(struct file_lock *fl)
7147 {
7148 /* check pending lock waiters */
7149 return waitqueue_active(&fl->fl_wait);
7150 }
7151
7152 /**
7153 * smb2_lock() - handler for smb2 file lock command
7154 * @work: smb work containing lock command buffer
7155 *
7156 * Return: 0 on success, otherwise error
7157 */
smb2_lock(struct ksmbd_work * work)7158 int smb2_lock(struct ksmbd_work *work)
7159 {
7160 struct smb2_lock_req *req;
7161 struct smb2_lock_rsp *rsp;
7162 struct smb2_lock_element *lock_ele;
7163 struct ksmbd_file *fp = NULL;
7164 struct file_lock *flock = NULL;
7165 struct file *filp = NULL;
7166 int lock_count;
7167 int flags = 0;
7168 int cmd = 0;
7169 int err = -EIO, i, rc = 0;
7170 u64 lock_start, lock_length;
7171 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7172 struct ksmbd_conn *conn;
7173 int nolock = 0;
7174 LIST_HEAD(lock_list);
7175 LIST_HEAD(rollback_list);
7176 int prior_lock = 0;
7177
7178 WORK_BUFFERS(work, req, rsp);
7179
7180 ksmbd_debug(SMB, "Received lock request\n");
7181 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7182 if (!fp) {
7183 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7184 err = -ENOENT;
7185 goto out2;
7186 }
7187
7188 filp = fp->filp;
7189 lock_count = le16_to_cpu(req->LockCount);
7190 lock_ele = req->locks;
7191
7192 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7193 if (!lock_count) {
7194 err = -EINVAL;
7195 goto out2;
7196 }
7197
7198 for (i = 0; i < lock_count; i++) {
7199 flags = le32_to_cpu(lock_ele[i].Flags);
7200
7201 flock = smb_flock_init(filp);
7202 if (!flock)
7203 goto out;
7204
7205 cmd = smb2_set_flock_flags(flock, flags);
7206
7207 lock_start = le64_to_cpu(lock_ele[i].Offset);
7208 lock_length = le64_to_cpu(lock_ele[i].Length);
7209 if (lock_start > U64_MAX - lock_length) {
7210 pr_err("Invalid lock range requested\n");
7211 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7212 locks_free_lock(flock);
7213 goto out;
7214 }
7215
7216 if (lock_start > OFFSET_MAX)
7217 flock->fl_start = OFFSET_MAX;
7218 else
7219 flock->fl_start = lock_start;
7220
7221 lock_length = le64_to_cpu(lock_ele[i].Length);
7222 if (lock_length > OFFSET_MAX - flock->fl_start)
7223 lock_length = OFFSET_MAX - flock->fl_start;
7224
7225 flock->fl_end = flock->fl_start + lock_length;
7226
7227 if (flock->fl_end < flock->fl_start) {
7228 ksmbd_debug(SMB,
7229 "the end offset(%llx) is smaller than the start offset(%llx)\n",
7230 flock->fl_end, flock->fl_start);
7231 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7232 locks_free_lock(flock);
7233 goto out;
7234 }
7235
7236 /* Check conflict locks in one request */
7237 list_for_each_entry(cmp_lock, &lock_list, llist) {
7238 if (cmp_lock->fl->fl_start <= flock->fl_start &&
7239 cmp_lock->fl->fl_end >= flock->fl_end) {
7240 if (cmp_lock->fl->fl_type != F_UNLCK &&
7241 flock->fl_type != F_UNLCK) {
7242 pr_err("conflict two locks in one request\n");
7243 err = -EINVAL;
7244 locks_free_lock(flock);
7245 goto out;
7246 }
7247 }
7248 }
7249
7250 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7251 if (!smb_lock) {
7252 err = -EINVAL;
7253 locks_free_lock(flock);
7254 goto out;
7255 }
7256 }
7257
7258 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7259 if (smb_lock->cmd < 0) {
7260 err = -EINVAL;
7261 goto out;
7262 }
7263
7264 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7265 err = -EINVAL;
7266 goto out;
7267 }
7268
7269 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7270 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7271 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7272 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7273 err = -EINVAL;
7274 goto out;
7275 }
7276
7277 prior_lock = smb_lock->flags;
7278
7279 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7280 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7281 goto no_check_cl;
7282
7283 nolock = 1;
7284 /* check locks in connection list */
7285 down_read(&conn_list_lock);
7286 list_for_each_entry(conn, &conn_list, conns_list) {
7287 spin_lock(&conn->llist_lock);
7288 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7289 if (file_inode(cmp_lock->fl->fl_file) !=
7290 file_inode(smb_lock->fl->fl_file))
7291 continue;
7292
7293 if (smb_lock->fl->fl_type == F_UNLCK) {
7294 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
7295 cmp_lock->start == smb_lock->start &&
7296 cmp_lock->end == smb_lock->end &&
7297 !lock_defer_pending(cmp_lock->fl)) {
7298 nolock = 0;
7299 list_del(&cmp_lock->flist);
7300 list_del(&cmp_lock->clist);
7301 spin_unlock(&conn->llist_lock);
7302 up_read(&conn_list_lock);
7303
7304 locks_free_lock(cmp_lock->fl);
7305 kfree(cmp_lock);
7306 goto out_check_cl;
7307 }
7308 continue;
7309 }
7310
7311 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7312 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7313 continue;
7314 } else {
7315 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7316 continue;
7317 }
7318
7319 /* check zero byte lock range */
7320 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7321 cmp_lock->start > smb_lock->start &&
7322 cmp_lock->start < smb_lock->end) {
7323 spin_unlock(&conn->llist_lock);
7324 up_read(&conn_list_lock);
7325 pr_err("previous lock conflict with zero byte lock range\n");
7326 goto out;
7327 }
7328
7329 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7330 smb_lock->start > cmp_lock->start &&
7331 smb_lock->start < cmp_lock->end) {
7332 spin_unlock(&conn->llist_lock);
7333 up_read(&conn_list_lock);
7334 pr_err("current lock conflict with zero byte lock range\n");
7335 goto out;
7336 }
7337
7338 if (((cmp_lock->start <= smb_lock->start &&
7339 cmp_lock->end > smb_lock->start) ||
7340 (cmp_lock->start < smb_lock->end &&
7341 cmp_lock->end >= smb_lock->end)) &&
7342 !cmp_lock->zero_len && !smb_lock->zero_len) {
7343 spin_unlock(&conn->llist_lock);
7344 up_read(&conn_list_lock);
7345 pr_err("Not allow lock operation on exclusive lock range\n");
7346 goto out;
7347 }
7348 }
7349 spin_unlock(&conn->llist_lock);
7350 }
7351 up_read(&conn_list_lock);
7352 out_check_cl:
7353 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7354 pr_err("Try to unlock nolocked range\n");
7355 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7356 goto out;
7357 }
7358
7359 no_check_cl:
7360 if (smb_lock->zero_len) {
7361 err = 0;
7362 goto skip;
7363 }
7364
7365 flock = smb_lock->fl;
7366 list_del(&smb_lock->llist);
7367 retry:
7368 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7369 skip:
7370 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7371 if (!rc) {
7372 ksmbd_debug(SMB, "File unlocked\n");
7373 } else if (rc == -ENOENT) {
7374 rsp->hdr.Status = STATUS_NOT_LOCKED;
7375 goto out;
7376 }
7377 locks_free_lock(flock);
7378 kfree(smb_lock);
7379 } else {
7380 if (rc == FILE_LOCK_DEFERRED) {
7381 void **argv;
7382
7383 ksmbd_debug(SMB,
7384 "would have to wait for getting lock\n");
7385 list_add(&smb_lock->llist, &rollback_list);
7386
7387 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7388 if (!argv) {
7389 err = -ENOMEM;
7390 goto out;
7391 }
7392 argv[0] = flock;
7393
7394 rc = setup_async_work(work,
7395 smb2_remove_blocked_lock,
7396 argv);
7397 if (rc) {
7398 kfree(argv);
7399 err = -ENOMEM;
7400 goto out;
7401 }
7402 spin_lock(&fp->f_lock);
7403 list_add(&work->fp_entry, &fp->blocked_works);
7404 spin_unlock(&fp->f_lock);
7405
7406 smb2_send_interim_resp(work, STATUS_PENDING);
7407
7408 ksmbd_vfs_posix_lock_wait(flock);
7409
7410 spin_lock(&fp->f_lock);
7411 list_del(&work->fp_entry);
7412 spin_unlock(&fp->f_lock);
7413
7414 if (work->state != KSMBD_WORK_ACTIVE) {
7415 list_del(&smb_lock->llist);
7416 locks_free_lock(flock);
7417
7418 if (work->state == KSMBD_WORK_CANCELLED) {
7419 rsp->hdr.Status =
7420 STATUS_CANCELLED;
7421 kfree(smb_lock);
7422 smb2_send_interim_resp(work,
7423 STATUS_CANCELLED);
7424 work->send_no_response = 1;
7425 goto out;
7426 }
7427
7428 rsp->hdr.Status =
7429 STATUS_RANGE_NOT_LOCKED;
7430 kfree(smb_lock);
7431 goto out2;
7432 }
7433
7434 list_del(&smb_lock->llist);
7435 release_async_work(work);
7436 goto retry;
7437 } else if (!rc) {
7438 list_add(&smb_lock->llist, &rollback_list);
7439 spin_lock(&work->conn->llist_lock);
7440 list_add_tail(&smb_lock->clist,
7441 &work->conn->lock_list);
7442 list_add_tail(&smb_lock->flist,
7443 &fp->lock_list);
7444 spin_unlock(&work->conn->llist_lock);
7445 ksmbd_debug(SMB, "successful in taking lock\n");
7446 } else {
7447 goto out;
7448 }
7449 }
7450 }
7451
7452 if (atomic_read(&fp->f_ci->op_count) > 1)
7453 smb_break_all_oplock(work, fp);
7454
7455 rsp->StructureSize = cpu_to_le16(4);
7456 ksmbd_debug(SMB, "successful in taking lock\n");
7457 rsp->hdr.Status = STATUS_SUCCESS;
7458 rsp->Reserved = 0;
7459 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7460 if (err)
7461 goto out;
7462
7463 ksmbd_fd_put(work, fp);
7464 return 0;
7465
7466 out:
7467 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7468 locks_free_lock(smb_lock->fl);
7469 list_del(&smb_lock->llist);
7470 kfree(smb_lock);
7471 }
7472
7473 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7474 struct file_lock *rlock = NULL;
7475
7476 rlock = smb_flock_init(filp);
7477 rlock->fl_type = F_UNLCK;
7478 rlock->fl_start = smb_lock->start;
7479 rlock->fl_end = smb_lock->end;
7480
7481 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7482 if (rc)
7483 pr_err("rollback unlock fail : %d\n", rc);
7484
7485 list_del(&smb_lock->llist);
7486 spin_lock(&work->conn->llist_lock);
7487 if (!list_empty(&smb_lock->flist))
7488 list_del(&smb_lock->flist);
7489 list_del(&smb_lock->clist);
7490 spin_unlock(&work->conn->llist_lock);
7491
7492 locks_free_lock(smb_lock->fl);
7493 locks_free_lock(rlock);
7494 kfree(smb_lock);
7495 }
7496 out2:
7497 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7498
7499 if (!rsp->hdr.Status) {
7500 if (err == -EINVAL)
7501 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7502 else if (err == -ENOMEM)
7503 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7504 else if (err == -ENOENT)
7505 rsp->hdr.Status = STATUS_FILE_CLOSED;
7506 else
7507 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7508 }
7509
7510 smb2_set_err_rsp(work);
7511 ksmbd_fd_put(work, fp);
7512 return err;
7513 }
7514
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)7515 static int fsctl_copychunk(struct ksmbd_work *work,
7516 struct copychunk_ioctl_req *ci_req,
7517 unsigned int cnt_code,
7518 unsigned int input_count,
7519 unsigned long long volatile_id,
7520 unsigned long long persistent_id,
7521 struct smb2_ioctl_rsp *rsp)
7522 {
7523 struct copychunk_ioctl_rsp *ci_rsp;
7524 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7525 struct srv_copychunk *chunks;
7526 unsigned int i, chunk_count, chunk_count_written = 0;
7527 unsigned int chunk_size_written = 0;
7528 loff_t total_size_written = 0;
7529 int ret = 0;
7530
7531 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7532
7533 rsp->VolatileFileId = volatile_id;
7534 rsp->PersistentFileId = persistent_id;
7535 ci_rsp->ChunksWritten =
7536 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7537 ci_rsp->ChunkBytesWritten =
7538 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7539 ci_rsp->TotalBytesWritten =
7540 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7541
7542 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7543 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7544 if (chunk_count == 0)
7545 goto out;
7546 total_size_written = 0;
7547
7548 /* verify the SRV_COPYCHUNK_COPY packet */
7549 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7550 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7551 chunk_count * sizeof(struct srv_copychunk)) {
7552 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7553 return -EINVAL;
7554 }
7555
7556 for (i = 0; i < chunk_count; i++) {
7557 if (le32_to_cpu(chunks[i].Length) == 0 ||
7558 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7559 break;
7560 total_size_written += le32_to_cpu(chunks[i].Length);
7561 }
7562
7563 if (i < chunk_count ||
7564 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7565 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7566 return -EINVAL;
7567 }
7568
7569 src_fp = ksmbd_lookup_foreign_fd(work,
7570 le64_to_cpu(ci_req->ResumeKey[0]));
7571 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7572 ret = -EINVAL;
7573 if (!src_fp ||
7574 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7575 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7576 goto out;
7577 }
7578
7579 if (!dst_fp) {
7580 rsp->hdr.Status = STATUS_FILE_CLOSED;
7581 goto out;
7582 }
7583
7584 /*
7585 * FILE_READ_DATA should only be included in
7586 * the FSCTL_COPYCHUNK case
7587 */
7588 if (cnt_code == FSCTL_COPYCHUNK &&
7589 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7590 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7591 goto out;
7592 }
7593
7594 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7595 chunks, chunk_count,
7596 &chunk_count_written,
7597 &chunk_size_written,
7598 &total_size_written);
7599 if (ret < 0) {
7600 if (ret == -EACCES)
7601 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7602 if (ret == -EAGAIN)
7603 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7604 else if (ret == -EBADF)
7605 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7606 else if (ret == -EFBIG || ret == -ENOSPC)
7607 rsp->hdr.Status = STATUS_DISK_FULL;
7608 else if (ret == -EINVAL)
7609 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7610 else if (ret == -EISDIR)
7611 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7612 else if (ret == -E2BIG)
7613 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7614 else
7615 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7616 }
7617
7618 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7619 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7620 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7621 out:
7622 ksmbd_fd_put(work, src_fp);
7623 ksmbd_fd_put(work, dst_fp);
7624 return ret;
7625 }
7626
idev_ipv4_address(struct in_device * idev)7627 static __be32 idev_ipv4_address(struct in_device *idev)
7628 {
7629 __be32 addr = 0;
7630
7631 struct in_ifaddr *ifa;
7632
7633 rcu_read_lock();
7634 in_dev_for_each_ifa_rcu(ifa, idev) {
7635 if (ifa->ifa_flags & IFA_F_SECONDARY)
7636 continue;
7637
7638 addr = ifa->ifa_address;
7639 break;
7640 }
7641 rcu_read_unlock();
7642 return addr;
7643 }
7644
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7645 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7646 struct smb2_ioctl_rsp *rsp,
7647 unsigned int out_buf_len)
7648 {
7649 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7650 int nbytes = 0;
7651 struct net_device *netdev;
7652 struct sockaddr_storage_rsp *sockaddr_storage;
7653 unsigned int flags;
7654 unsigned long long speed;
7655
7656 rtnl_lock();
7657 for_each_netdev(&init_net, netdev) {
7658 bool ipv4_set = false;
7659
7660 if (netdev->type == ARPHRD_LOOPBACK)
7661 continue;
7662
7663 flags = dev_get_flags(netdev);
7664 if (!(flags & IFF_RUNNING))
7665 continue;
7666 ipv6_retry:
7667 if (out_buf_len <
7668 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7669 rtnl_unlock();
7670 return -ENOSPC;
7671 }
7672
7673 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7674 &rsp->Buffer[nbytes];
7675 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7676
7677 nii_rsp->Capability = 0;
7678 if (netdev->real_num_tx_queues > 1)
7679 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7680 if (ksmbd_rdma_capable_netdev(netdev))
7681 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7682
7683 nii_rsp->Next = cpu_to_le32(152);
7684 nii_rsp->Reserved = 0;
7685
7686 if (netdev->ethtool_ops->get_link_ksettings) {
7687 struct ethtool_link_ksettings cmd;
7688
7689 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7690 speed = cmd.base.speed;
7691 } else {
7692 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7693 "speed is unknown, defaulting to 1Gb/sec");
7694 speed = SPEED_1000;
7695 }
7696
7697 speed *= 1000000;
7698 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7699
7700 sockaddr_storage = (struct sockaddr_storage_rsp *)
7701 nii_rsp->SockAddr_Storage;
7702 memset(sockaddr_storage, 0, 128);
7703
7704 if (!ipv4_set) {
7705 struct in_device *idev;
7706
7707 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7708 sockaddr_storage->addr4.Port = 0;
7709
7710 idev = __in_dev_get_rtnl(netdev);
7711 if (!idev)
7712 continue;
7713 sockaddr_storage->addr4.IPv4address =
7714 idev_ipv4_address(idev);
7715 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7716 ipv4_set = true;
7717 goto ipv6_retry;
7718 } else {
7719 struct inet6_dev *idev6;
7720 struct inet6_ifaddr *ifa;
7721 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7722
7723 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7724 sockaddr_storage->addr6.Port = 0;
7725 sockaddr_storage->addr6.FlowInfo = 0;
7726
7727 idev6 = __in6_dev_get(netdev);
7728 if (!idev6)
7729 continue;
7730
7731 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7732 if (ifa->flags & (IFA_F_TENTATIVE |
7733 IFA_F_DEPRECATED))
7734 continue;
7735 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7736 break;
7737 }
7738 sockaddr_storage->addr6.ScopeId = 0;
7739 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7740 }
7741 }
7742 rtnl_unlock();
7743
7744 /* zero if this is last one */
7745 if (nii_rsp)
7746 nii_rsp->Next = 0;
7747
7748 rsp->PersistentFileId = SMB2_NO_FID;
7749 rsp->VolatileFileId = SMB2_NO_FID;
7750 return nbytes;
7751 }
7752
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)7753 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7754 struct validate_negotiate_info_req *neg_req,
7755 struct validate_negotiate_info_rsp *neg_rsp,
7756 unsigned int in_buf_len)
7757 {
7758 int ret = 0;
7759 int dialect;
7760
7761 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7762 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7763 return -EINVAL;
7764
7765 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7766 neg_req->DialectCount);
7767 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7768 ret = -EINVAL;
7769 goto err_out;
7770 }
7771
7772 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7773 ret = -EINVAL;
7774 goto err_out;
7775 }
7776
7777 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7778 ret = -EINVAL;
7779 goto err_out;
7780 }
7781
7782 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7783 ret = -EINVAL;
7784 goto err_out;
7785 }
7786
7787 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7788 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7789 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7790 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7791 err_out:
7792 return ret;
7793 }
7794
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)7795 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7796 struct file_allocated_range_buffer *qar_req,
7797 struct file_allocated_range_buffer *qar_rsp,
7798 unsigned int in_count, unsigned int *out_count)
7799 {
7800 struct ksmbd_file *fp;
7801 loff_t start, length;
7802 int ret = 0;
7803
7804 *out_count = 0;
7805 if (in_count == 0)
7806 return -EINVAL;
7807
7808 start = le64_to_cpu(qar_req->file_offset);
7809 length = le64_to_cpu(qar_req->length);
7810
7811 if (start < 0 || length < 0)
7812 return -EINVAL;
7813
7814 fp = ksmbd_lookup_fd_fast(work, id);
7815 if (!fp)
7816 return -ENOENT;
7817
7818 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7819 qar_rsp, in_count, out_count);
7820 if (ret && ret != -E2BIG)
7821 *out_count = 0;
7822
7823 ksmbd_fd_put(work, fp);
7824 return ret;
7825 }
7826
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7827 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7828 unsigned int out_buf_len,
7829 struct smb2_ioctl_req *req,
7830 struct smb2_ioctl_rsp *rsp)
7831 {
7832 struct ksmbd_rpc_command *rpc_resp;
7833 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7834 int nbytes = 0;
7835
7836 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7837 le32_to_cpu(req->InputCount));
7838 if (rpc_resp) {
7839 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7840 /*
7841 * set STATUS_SOME_NOT_MAPPED response
7842 * for unknown domain sid.
7843 */
7844 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7845 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7846 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7847 goto out;
7848 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7849 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7850 goto out;
7851 }
7852
7853 nbytes = rpc_resp->payload_sz;
7854 if (rpc_resp->payload_sz > out_buf_len) {
7855 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7856 nbytes = out_buf_len;
7857 }
7858
7859 if (!rpc_resp->payload_sz) {
7860 rsp->hdr.Status =
7861 STATUS_UNEXPECTED_IO_ERROR;
7862 goto out;
7863 }
7864
7865 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7866 }
7867 out:
7868 kvfree(rpc_resp);
7869 return nbytes;
7870 }
7871
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7872 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7873 struct file_sparse *sparse)
7874 {
7875 struct ksmbd_file *fp;
7876 struct mnt_idmap *idmap;
7877 int ret = 0;
7878 __le32 old_fattr;
7879
7880 fp = ksmbd_lookup_fd_fast(work, id);
7881 if (!fp)
7882 return -ENOENT;
7883 idmap = file_mnt_idmap(fp->filp);
7884
7885 old_fattr = fp->f_ci->m_fattr;
7886 if (sparse->SetSparse)
7887 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7888 else
7889 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7890
7891 if (fp->f_ci->m_fattr != old_fattr &&
7892 test_share_config_flag(work->tcon->share_conf,
7893 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7894 struct xattr_dos_attrib da;
7895
7896 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7897 fp->filp->f_path.dentry, &da);
7898 if (ret <= 0)
7899 goto out;
7900
7901 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7902 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7903 &fp->filp->f_path,
7904 &da, true);
7905 if (ret)
7906 fp->f_ci->m_fattr = old_fattr;
7907 }
7908
7909 out:
7910 ksmbd_fd_put(work, fp);
7911 return ret;
7912 }
7913
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)7914 static int fsctl_request_resume_key(struct ksmbd_work *work,
7915 struct smb2_ioctl_req *req,
7916 struct resume_key_ioctl_rsp *key_rsp)
7917 {
7918 struct ksmbd_file *fp;
7919
7920 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7921 if (!fp)
7922 return -ENOENT;
7923
7924 memset(key_rsp, 0, sizeof(*key_rsp));
7925 key_rsp->ResumeKey[0] = req->VolatileFileId;
7926 key_rsp->ResumeKey[1] = req->PersistentFileId;
7927 ksmbd_fd_put(work, fp);
7928
7929 return 0;
7930 }
7931
7932 /**
7933 * smb2_ioctl() - handler for smb2 ioctl command
7934 * @work: smb work containing ioctl command buffer
7935 *
7936 * Return: 0 on success, otherwise error
7937 */
smb2_ioctl(struct ksmbd_work * work)7938 int smb2_ioctl(struct ksmbd_work *work)
7939 {
7940 struct smb2_ioctl_req *req;
7941 struct smb2_ioctl_rsp *rsp;
7942 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7943 u64 id = KSMBD_NO_FID;
7944 struct ksmbd_conn *conn = work->conn;
7945 int ret = 0;
7946 char *buffer;
7947
7948 if (work->next_smb2_rcv_hdr_off) {
7949 req = ksmbd_req_buf_next(work);
7950 rsp = ksmbd_resp_buf_next(work);
7951 if (!has_file_id(req->VolatileFileId)) {
7952 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7953 work->compound_fid);
7954 id = work->compound_fid;
7955 }
7956 } else {
7957 req = smb2_get_msg(work->request_buf);
7958 rsp = smb2_get_msg(work->response_buf);
7959 }
7960
7961 if (!has_file_id(id))
7962 id = req->VolatileFileId;
7963
7964 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7965 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7966 goto out;
7967 }
7968
7969 buffer = (char *)req + le32_to_cpu(req->InputOffset);
7970
7971 cnt_code = le32_to_cpu(req->CtlCode);
7972 ret = smb2_calc_max_out_buf_len(work, 48,
7973 le32_to_cpu(req->MaxOutputResponse));
7974 if (ret < 0) {
7975 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7976 goto out;
7977 }
7978 out_buf_len = (unsigned int)ret;
7979 in_buf_len = le32_to_cpu(req->InputCount);
7980
7981 switch (cnt_code) {
7982 case FSCTL_DFS_GET_REFERRALS:
7983 case FSCTL_DFS_GET_REFERRALS_EX:
7984 /* Not support DFS yet */
7985 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7986 goto out;
7987 case FSCTL_CREATE_OR_GET_OBJECT_ID:
7988 {
7989 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7990
7991 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7992 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7993 &rsp->Buffer[0];
7994
7995 /*
7996 * TODO: This is dummy implementation to pass smbtorture
7997 * Need to check correct response later
7998 */
7999 memset(obj_buf->ObjectId, 0x0, 16);
8000 memset(obj_buf->BirthVolumeId, 0x0, 16);
8001 memset(obj_buf->BirthObjectId, 0x0, 16);
8002 memset(obj_buf->DomainId, 0x0, 16);
8003
8004 break;
8005 }
8006 case FSCTL_PIPE_TRANSCEIVE:
8007 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8008 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8009 break;
8010 case FSCTL_VALIDATE_NEGOTIATE_INFO:
8011 if (conn->dialect < SMB30_PROT_ID) {
8012 ret = -EOPNOTSUPP;
8013 goto out;
8014 }
8015
8016 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8017 Dialects)) {
8018 ret = -EINVAL;
8019 goto out;
8020 }
8021
8022 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8023 ret = -EINVAL;
8024 goto out;
8025 }
8026
8027 ret = fsctl_validate_negotiate_info(conn,
8028 (struct validate_negotiate_info_req *)buffer,
8029 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8030 in_buf_len);
8031 if (ret < 0)
8032 goto out;
8033
8034 nbytes = sizeof(struct validate_negotiate_info_rsp);
8035 rsp->PersistentFileId = SMB2_NO_FID;
8036 rsp->VolatileFileId = SMB2_NO_FID;
8037 break;
8038 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8039 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8040 if (ret < 0)
8041 goto out;
8042 nbytes = ret;
8043 break;
8044 case FSCTL_REQUEST_RESUME_KEY:
8045 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8046 ret = -EINVAL;
8047 goto out;
8048 }
8049
8050 ret = fsctl_request_resume_key(work, req,
8051 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8052 if (ret < 0)
8053 goto out;
8054 rsp->PersistentFileId = req->PersistentFileId;
8055 rsp->VolatileFileId = req->VolatileFileId;
8056 nbytes = sizeof(struct resume_key_ioctl_rsp);
8057 break;
8058 case FSCTL_COPYCHUNK:
8059 case FSCTL_COPYCHUNK_WRITE:
8060 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8061 ksmbd_debug(SMB,
8062 "User does not have write permission\n");
8063 ret = -EACCES;
8064 goto out;
8065 }
8066
8067 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
8068 ret = -EINVAL;
8069 goto out;
8070 }
8071
8072 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8073 ret = -EINVAL;
8074 goto out;
8075 }
8076
8077 nbytes = sizeof(struct copychunk_ioctl_rsp);
8078 rsp->VolatileFileId = req->VolatileFileId;
8079 rsp->PersistentFileId = req->PersistentFileId;
8080 fsctl_copychunk(work,
8081 (struct copychunk_ioctl_req *)buffer,
8082 le32_to_cpu(req->CtlCode),
8083 le32_to_cpu(req->InputCount),
8084 req->VolatileFileId,
8085 req->PersistentFileId,
8086 rsp);
8087 break;
8088 case FSCTL_SET_SPARSE:
8089 if (in_buf_len < sizeof(struct file_sparse)) {
8090 ret = -EINVAL;
8091 goto out;
8092 }
8093
8094 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8095 if (ret < 0)
8096 goto out;
8097 break;
8098 case FSCTL_SET_ZERO_DATA:
8099 {
8100 struct file_zero_data_information *zero_data;
8101 struct ksmbd_file *fp;
8102 loff_t off, len, bfz;
8103
8104 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8105 ksmbd_debug(SMB,
8106 "User does not have write permission\n");
8107 ret = -EACCES;
8108 goto out;
8109 }
8110
8111 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8112 ret = -EINVAL;
8113 goto out;
8114 }
8115
8116 zero_data =
8117 (struct file_zero_data_information *)buffer;
8118
8119 off = le64_to_cpu(zero_data->FileOffset);
8120 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8121 if (off < 0 || bfz < 0 || off > bfz) {
8122 ret = -EINVAL;
8123 goto out;
8124 }
8125
8126 len = bfz - off;
8127 if (len) {
8128 fp = ksmbd_lookup_fd_fast(work, id);
8129 if (!fp) {
8130 ret = -ENOENT;
8131 goto out;
8132 }
8133
8134 ret = ksmbd_vfs_zero_data(work, fp, off, len);
8135 ksmbd_fd_put(work, fp);
8136 if (ret < 0)
8137 goto out;
8138 }
8139 break;
8140 }
8141 case FSCTL_QUERY_ALLOCATED_RANGES:
8142 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8143 ret = -EINVAL;
8144 goto out;
8145 }
8146
8147 ret = fsctl_query_allocated_ranges(work, id,
8148 (struct file_allocated_range_buffer *)buffer,
8149 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8150 out_buf_len /
8151 sizeof(struct file_allocated_range_buffer), &nbytes);
8152 if (ret == -E2BIG) {
8153 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8154 } else if (ret < 0) {
8155 nbytes = 0;
8156 goto out;
8157 }
8158
8159 nbytes *= sizeof(struct file_allocated_range_buffer);
8160 break;
8161 case FSCTL_GET_REPARSE_POINT:
8162 {
8163 struct reparse_data_buffer *reparse_ptr;
8164 struct ksmbd_file *fp;
8165
8166 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8167 fp = ksmbd_lookup_fd_fast(work, id);
8168 if (!fp) {
8169 pr_err("not found fp!!\n");
8170 ret = -ENOENT;
8171 goto out;
8172 }
8173
8174 reparse_ptr->ReparseTag =
8175 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8176 reparse_ptr->ReparseDataLength = 0;
8177 ksmbd_fd_put(work, fp);
8178 nbytes = sizeof(struct reparse_data_buffer);
8179 break;
8180 }
8181 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8182 {
8183 struct ksmbd_file *fp_in, *fp_out = NULL;
8184 struct duplicate_extents_to_file *dup_ext;
8185 loff_t src_off, dst_off, length, cloned;
8186
8187 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8188 ret = -EINVAL;
8189 goto out;
8190 }
8191
8192 dup_ext = (struct duplicate_extents_to_file *)buffer;
8193
8194 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8195 dup_ext->PersistentFileHandle);
8196 if (!fp_in) {
8197 pr_err("not found file handle in duplicate extent to file\n");
8198 ret = -ENOENT;
8199 goto out;
8200 }
8201
8202 fp_out = ksmbd_lookup_fd_fast(work, id);
8203 if (!fp_out) {
8204 pr_err("not found fp\n");
8205 ret = -ENOENT;
8206 goto dup_ext_out;
8207 }
8208
8209 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8210 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8211 length = le64_to_cpu(dup_ext->ByteCount);
8212 /*
8213 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8214 * should fall back to vfs_copy_file_range(). This could be
8215 * beneficial when re-exporting nfs/smb mount, but note that
8216 * this can result in partial copy that returns an error status.
8217 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8218 * fall back to vfs_copy_file_range(), should be avoided when
8219 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8220 */
8221 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8222 fp_out->filp, dst_off, length, 0);
8223 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8224 ret = -EOPNOTSUPP;
8225 goto dup_ext_out;
8226 } else if (cloned != length) {
8227 cloned = vfs_copy_file_range(fp_in->filp, src_off,
8228 fp_out->filp, dst_off,
8229 length, 0);
8230 if (cloned != length) {
8231 if (cloned < 0)
8232 ret = cloned;
8233 else
8234 ret = -EINVAL;
8235 }
8236 }
8237
8238 dup_ext_out:
8239 ksmbd_fd_put(work, fp_in);
8240 ksmbd_fd_put(work, fp_out);
8241 if (ret < 0)
8242 goto out;
8243 break;
8244 }
8245 default:
8246 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8247 cnt_code);
8248 ret = -EOPNOTSUPP;
8249 goto out;
8250 }
8251
8252 rsp->CtlCode = cpu_to_le32(cnt_code);
8253 rsp->InputCount = cpu_to_le32(0);
8254 rsp->InputOffset = cpu_to_le32(112);
8255 rsp->OutputOffset = cpu_to_le32(112);
8256 rsp->OutputCount = cpu_to_le32(nbytes);
8257 rsp->StructureSize = cpu_to_le16(49);
8258 rsp->Reserved = cpu_to_le16(0);
8259 rsp->Flags = cpu_to_le32(0);
8260 rsp->Reserved2 = cpu_to_le32(0);
8261 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8262 if (!ret)
8263 return ret;
8264
8265 out:
8266 if (ret == -EACCES)
8267 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8268 else if (ret == -ENOENT)
8269 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8270 else if (ret == -EOPNOTSUPP)
8271 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8272 else if (ret == -ENOSPC)
8273 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8274 else if (ret < 0 || rsp->hdr.Status == 0)
8275 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8276 smb2_set_err_rsp(work);
8277 return 0;
8278 }
8279
8280 /**
8281 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8282 * @work: smb work containing oplock break command buffer
8283 *
8284 * Return: 0
8285 */
smb20_oplock_break_ack(struct ksmbd_work * work)8286 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8287 {
8288 struct smb2_oplock_break *req;
8289 struct smb2_oplock_break *rsp;
8290 struct ksmbd_file *fp;
8291 struct oplock_info *opinfo = NULL;
8292 __le32 err = 0;
8293 int ret = 0;
8294 u64 volatile_id, persistent_id;
8295 char req_oplevel = 0, rsp_oplevel = 0;
8296 unsigned int oplock_change_type;
8297
8298 WORK_BUFFERS(work, req, rsp);
8299
8300 volatile_id = req->VolatileFid;
8301 persistent_id = req->PersistentFid;
8302 req_oplevel = req->OplockLevel;
8303 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8304 volatile_id, persistent_id, req_oplevel);
8305
8306 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8307 if (!fp) {
8308 rsp->hdr.Status = STATUS_FILE_CLOSED;
8309 smb2_set_err_rsp(work);
8310 return;
8311 }
8312
8313 opinfo = opinfo_get(fp);
8314 if (!opinfo) {
8315 pr_err("unexpected null oplock_info\n");
8316 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8317 smb2_set_err_rsp(work);
8318 ksmbd_fd_put(work, fp);
8319 return;
8320 }
8321
8322 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8323 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8324 goto err_out;
8325 }
8326
8327 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8328 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8329 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8330 goto err_out;
8331 }
8332
8333 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8334 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8335 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8336 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8337 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8338 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8339 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8340 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8341 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8342 oplock_change_type = OPLOCK_READ_TO_NONE;
8343 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8344 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8345 err = STATUS_INVALID_DEVICE_STATE;
8346 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8347 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8348 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8349 oplock_change_type = OPLOCK_WRITE_TO_READ;
8350 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8351 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8352 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8353 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8354 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8355 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8356 oplock_change_type = OPLOCK_READ_TO_NONE;
8357 } else {
8358 oplock_change_type = 0;
8359 }
8360 } else {
8361 oplock_change_type = 0;
8362 }
8363
8364 switch (oplock_change_type) {
8365 case OPLOCK_WRITE_TO_READ:
8366 ret = opinfo_write_to_read(opinfo);
8367 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8368 break;
8369 case OPLOCK_WRITE_TO_NONE:
8370 ret = opinfo_write_to_none(opinfo);
8371 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8372 break;
8373 case OPLOCK_READ_TO_NONE:
8374 ret = opinfo_read_to_none(opinfo);
8375 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8376 break;
8377 default:
8378 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8379 opinfo->level, rsp_oplevel);
8380 }
8381
8382 if (ret < 0) {
8383 rsp->hdr.Status = err;
8384 goto err_out;
8385 }
8386
8387 opinfo->op_state = OPLOCK_STATE_NONE;
8388 wake_up_interruptible_all(&opinfo->oplock_q);
8389 opinfo_put(opinfo);
8390 ksmbd_fd_put(work, fp);
8391
8392 rsp->StructureSize = cpu_to_le16(24);
8393 rsp->OplockLevel = rsp_oplevel;
8394 rsp->Reserved = 0;
8395 rsp->Reserved2 = 0;
8396 rsp->VolatileFid = volatile_id;
8397 rsp->PersistentFid = persistent_id;
8398 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8399 if (!ret)
8400 return;
8401
8402 err_out:
8403 opinfo->op_state = OPLOCK_STATE_NONE;
8404 wake_up_interruptible_all(&opinfo->oplock_q);
8405
8406 opinfo_put(opinfo);
8407 ksmbd_fd_put(work, fp);
8408 smb2_set_err_rsp(work);
8409 }
8410
check_lease_state(struct lease * lease,__le32 req_state)8411 static int check_lease_state(struct lease *lease, __le32 req_state)
8412 {
8413 if ((lease->new_state ==
8414 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8415 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8416 lease->new_state = req_state;
8417 return 0;
8418 }
8419
8420 if (lease->new_state == req_state)
8421 return 0;
8422
8423 return 1;
8424 }
8425
8426 /**
8427 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8428 * @work: smb work containing lease break command buffer
8429 *
8430 * Return: 0
8431 */
smb21_lease_break_ack(struct ksmbd_work * work)8432 static void smb21_lease_break_ack(struct ksmbd_work *work)
8433 {
8434 struct ksmbd_conn *conn = work->conn;
8435 struct smb2_lease_ack *req;
8436 struct smb2_lease_ack *rsp;
8437 struct oplock_info *opinfo;
8438 __le32 err = 0;
8439 int ret = 0;
8440 unsigned int lease_change_type;
8441 __le32 lease_state;
8442 struct lease *lease;
8443
8444 WORK_BUFFERS(work, req, rsp);
8445
8446 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8447 le32_to_cpu(req->LeaseState));
8448 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8449 if (!opinfo) {
8450 ksmbd_debug(OPLOCK, "file not opened\n");
8451 smb2_set_err_rsp(work);
8452 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8453 return;
8454 }
8455 lease = opinfo->o_lease;
8456
8457 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8458 pr_err("unexpected lease break state 0x%x\n",
8459 opinfo->op_state);
8460 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8461 goto err_out;
8462 }
8463
8464 if (check_lease_state(lease, req->LeaseState)) {
8465 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8466 ksmbd_debug(OPLOCK,
8467 "req lease state: 0x%x, expected state: 0x%x\n",
8468 req->LeaseState, lease->new_state);
8469 goto err_out;
8470 }
8471
8472 if (!atomic_read(&opinfo->breaking_cnt)) {
8473 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8474 goto err_out;
8475 }
8476
8477 /* check for bad lease state */
8478 if (req->LeaseState &
8479 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8480 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8481 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8482 lease_change_type = OPLOCK_WRITE_TO_NONE;
8483 else
8484 lease_change_type = OPLOCK_READ_TO_NONE;
8485 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8486 le32_to_cpu(lease->state),
8487 le32_to_cpu(req->LeaseState));
8488 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8489 req->LeaseState != SMB2_LEASE_NONE_LE) {
8490 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8491 lease_change_type = OPLOCK_READ_TO_NONE;
8492 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8493 le32_to_cpu(lease->state),
8494 le32_to_cpu(req->LeaseState));
8495 } else {
8496 /* valid lease state changes */
8497 err = STATUS_INVALID_DEVICE_STATE;
8498 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8499 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8500 lease_change_type = OPLOCK_WRITE_TO_NONE;
8501 else
8502 lease_change_type = OPLOCK_READ_TO_NONE;
8503 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8504 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8505 lease_change_type = OPLOCK_WRITE_TO_READ;
8506 else
8507 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8508 } else {
8509 lease_change_type = 0;
8510 }
8511 }
8512
8513 switch (lease_change_type) {
8514 case OPLOCK_WRITE_TO_READ:
8515 ret = opinfo_write_to_read(opinfo);
8516 break;
8517 case OPLOCK_READ_HANDLE_TO_READ:
8518 ret = opinfo_read_handle_to_read(opinfo);
8519 break;
8520 case OPLOCK_WRITE_TO_NONE:
8521 ret = opinfo_write_to_none(opinfo);
8522 break;
8523 case OPLOCK_READ_TO_NONE:
8524 ret = opinfo_read_to_none(opinfo);
8525 break;
8526 default:
8527 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8528 le32_to_cpu(lease->state),
8529 le32_to_cpu(req->LeaseState));
8530 }
8531
8532 if (ret < 0) {
8533 rsp->hdr.Status = err;
8534 goto err_out;
8535 }
8536
8537 lease_state = lease->state;
8538 opinfo->op_state = OPLOCK_STATE_NONE;
8539 wake_up_interruptible_all(&opinfo->oplock_q);
8540 atomic_dec(&opinfo->breaking_cnt);
8541 wake_up_interruptible_all(&opinfo->oplock_brk);
8542 opinfo_put(opinfo);
8543
8544 rsp->StructureSize = cpu_to_le16(36);
8545 rsp->Reserved = 0;
8546 rsp->Flags = 0;
8547 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8548 rsp->LeaseState = lease_state;
8549 rsp->LeaseDuration = 0;
8550 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8551 if (!ret)
8552 return;
8553
8554 err_out:
8555 wake_up_interruptible_all(&opinfo->oplock_q);
8556 atomic_dec(&opinfo->breaking_cnt);
8557 wake_up_interruptible_all(&opinfo->oplock_brk);
8558
8559 opinfo_put(opinfo);
8560 smb2_set_err_rsp(work);
8561 }
8562
8563 /**
8564 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8565 * @work: smb work containing oplock/lease break command buffer
8566 *
8567 * Return: 0
8568 */
smb2_oplock_break(struct ksmbd_work * work)8569 int smb2_oplock_break(struct ksmbd_work *work)
8570 {
8571 struct smb2_oplock_break *req;
8572 struct smb2_oplock_break *rsp;
8573
8574 WORK_BUFFERS(work, req, rsp);
8575
8576 switch (le16_to_cpu(req->StructureSize)) {
8577 case OP_BREAK_STRUCT_SIZE_20:
8578 smb20_oplock_break_ack(work);
8579 break;
8580 case OP_BREAK_STRUCT_SIZE_21:
8581 smb21_lease_break_ack(work);
8582 break;
8583 default:
8584 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8585 le16_to_cpu(req->StructureSize));
8586 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8587 smb2_set_err_rsp(work);
8588 }
8589
8590 return 0;
8591 }
8592
8593 /**
8594 * smb2_notify() - handler for smb2 notify request
8595 * @work: smb work containing notify command buffer
8596 *
8597 * Return: 0
8598 */
smb2_notify(struct ksmbd_work * work)8599 int smb2_notify(struct ksmbd_work *work)
8600 {
8601 struct smb2_change_notify_req *req;
8602 struct smb2_change_notify_rsp *rsp;
8603
8604 WORK_BUFFERS(work, req, rsp);
8605
8606 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8607 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8608 smb2_set_err_rsp(work);
8609 return 0;
8610 }
8611
8612 smb2_set_err_rsp(work);
8613 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8614 return 0;
8615 }
8616
8617 /**
8618 * smb2_is_sign_req() - handler for checking packet signing status
8619 * @work: smb work containing notify command buffer
8620 * @command: SMB2 command id
8621 *
8622 * Return: true if packed is signed, false otherwise
8623 */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8624 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8625 {
8626 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8627
8628 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8629 command != SMB2_NEGOTIATE_HE &&
8630 command != SMB2_SESSION_SETUP_HE &&
8631 command != SMB2_OPLOCK_BREAK_HE)
8632 return true;
8633
8634 return false;
8635 }
8636
8637 /**
8638 * smb2_check_sign_req() - handler for req packet sign processing
8639 * @work: smb work containing notify command buffer
8640 *
8641 * Return: 1 on success, 0 otherwise
8642 */
smb2_check_sign_req(struct ksmbd_work * work)8643 int smb2_check_sign_req(struct ksmbd_work *work)
8644 {
8645 struct smb2_hdr *hdr;
8646 char signature_req[SMB2_SIGNATURE_SIZE];
8647 char signature[SMB2_HMACSHA256_SIZE];
8648 struct kvec iov[1];
8649 size_t len;
8650
8651 hdr = smb2_get_msg(work->request_buf);
8652 if (work->next_smb2_rcv_hdr_off)
8653 hdr = ksmbd_req_buf_next(work);
8654
8655 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8656 len = get_rfc1002_len(work->request_buf);
8657 else if (hdr->NextCommand)
8658 len = le32_to_cpu(hdr->NextCommand);
8659 else
8660 len = get_rfc1002_len(work->request_buf) -
8661 work->next_smb2_rcv_hdr_off;
8662
8663 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8664 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8665
8666 iov[0].iov_base = (char *)&hdr->ProtocolId;
8667 iov[0].iov_len = len;
8668
8669 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8670 signature))
8671 return 0;
8672
8673 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8674 pr_err("bad smb2 signature\n");
8675 return 0;
8676 }
8677
8678 return 1;
8679 }
8680
8681 /**
8682 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8683 * @work: smb work containing notify command buffer
8684 *
8685 */
smb2_set_sign_rsp(struct ksmbd_work * work)8686 void smb2_set_sign_rsp(struct ksmbd_work *work)
8687 {
8688 struct smb2_hdr *hdr;
8689 char signature[SMB2_HMACSHA256_SIZE];
8690 struct kvec *iov;
8691 int n_vec = 1;
8692
8693 hdr = ksmbd_resp_buf_curr(work);
8694 hdr->Flags |= SMB2_FLAGS_SIGNED;
8695 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8696
8697 if (hdr->Command == SMB2_READ) {
8698 iov = &work->iov[work->iov_idx - 1];
8699 n_vec++;
8700 } else {
8701 iov = &work->iov[work->iov_idx];
8702 }
8703
8704 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8705 signature))
8706 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8707 }
8708
8709 /**
8710 * smb3_check_sign_req() - handler for req packet sign processing
8711 * @work: smb work containing notify command buffer
8712 *
8713 * Return: 1 on success, 0 otherwise
8714 */
smb3_check_sign_req(struct ksmbd_work * work)8715 int smb3_check_sign_req(struct ksmbd_work *work)
8716 {
8717 struct ksmbd_conn *conn = work->conn;
8718 char *signing_key;
8719 struct smb2_hdr *hdr;
8720 struct channel *chann;
8721 char signature_req[SMB2_SIGNATURE_SIZE];
8722 char signature[SMB2_CMACAES_SIZE];
8723 struct kvec iov[1];
8724 size_t len;
8725
8726 hdr = smb2_get_msg(work->request_buf);
8727 if (work->next_smb2_rcv_hdr_off)
8728 hdr = ksmbd_req_buf_next(work);
8729
8730 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8731 len = get_rfc1002_len(work->request_buf);
8732 else if (hdr->NextCommand)
8733 len = le32_to_cpu(hdr->NextCommand);
8734 else
8735 len = get_rfc1002_len(work->request_buf) -
8736 work->next_smb2_rcv_hdr_off;
8737
8738 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8739 signing_key = work->sess->smb3signingkey;
8740 } else {
8741 chann = lookup_chann_list(work->sess, conn);
8742 if (!chann) {
8743 return 0;
8744 }
8745 signing_key = chann->smb3signingkey;
8746 }
8747
8748 if (!signing_key) {
8749 pr_err("SMB3 signing key is not generated\n");
8750 return 0;
8751 }
8752
8753 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8754 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8755 iov[0].iov_base = (char *)&hdr->ProtocolId;
8756 iov[0].iov_len = len;
8757
8758 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8759 return 0;
8760
8761 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8762 pr_err("bad smb2 signature\n");
8763 return 0;
8764 }
8765
8766 return 1;
8767 }
8768
8769 /**
8770 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8771 * @work: smb work containing notify command buffer
8772 *
8773 */
smb3_set_sign_rsp(struct ksmbd_work * work)8774 void smb3_set_sign_rsp(struct ksmbd_work *work)
8775 {
8776 struct ksmbd_conn *conn = work->conn;
8777 struct smb2_hdr *hdr;
8778 struct channel *chann;
8779 char signature[SMB2_CMACAES_SIZE];
8780 struct kvec *iov;
8781 int n_vec = 1;
8782 char *signing_key;
8783
8784 hdr = ksmbd_resp_buf_curr(work);
8785
8786 if (conn->binding == false &&
8787 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8788 signing_key = work->sess->smb3signingkey;
8789 } else {
8790 chann = lookup_chann_list(work->sess, work->conn);
8791 if (!chann) {
8792 return;
8793 }
8794 signing_key = chann->smb3signingkey;
8795 }
8796
8797 if (!signing_key)
8798 return;
8799
8800 hdr->Flags |= SMB2_FLAGS_SIGNED;
8801 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8802
8803 if (hdr->Command == SMB2_READ) {
8804 iov = &work->iov[work->iov_idx - 1];
8805 n_vec++;
8806 } else {
8807 iov = &work->iov[work->iov_idx];
8808 }
8809
8810 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8811 signature))
8812 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8813 }
8814
8815 /**
8816 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8817 * @work: smb work containing response buffer
8818 *
8819 */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8820 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8821 {
8822 struct ksmbd_conn *conn = work->conn;
8823 struct ksmbd_session *sess = work->sess;
8824 struct smb2_hdr *req, *rsp;
8825
8826 if (conn->dialect != SMB311_PROT_ID)
8827 return;
8828
8829 WORK_BUFFERS(work, req, rsp);
8830
8831 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8832 conn->preauth_info)
8833 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8834 conn->preauth_info->Preauth_HashValue);
8835
8836 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8837 __u8 *hash_value;
8838
8839 if (conn->binding) {
8840 struct preauth_session *preauth_sess;
8841
8842 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8843 if (!preauth_sess)
8844 return;
8845 hash_value = preauth_sess->Preauth_HashValue;
8846 } else {
8847 hash_value = sess->Preauth_HashValue;
8848 if (!hash_value)
8849 return;
8850 }
8851 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8852 hash_value);
8853 }
8854 }
8855
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8856 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8857 {
8858 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8859 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8860 unsigned int orig_len = get_rfc1002_len(old_buf);
8861
8862 /* tr_buf must be cleared by the caller */
8863 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8864 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8865 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8866 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8867 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8868 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8869 else
8870 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8871 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8872 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8873 inc_rfc1001_len(tr_buf, orig_len);
8874 }
8875
smb3_encrypt_resp(struct ksmbd_work * work)8876 int smb3_encrypt_resp(struct ksmbd_work *work)
8877 {
8878 struct kvec *iov = work->iov;
8879 int rc = -ENOMEM;
8880 void *tr_buf;
8881
8882 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8883 if (!tr_buf)
8884 return rc;
8885
8886 /* fill transform header */
8887 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8888
8889 iov[0].iov_base = tr_buf;
8890 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8891 work->tr_buf = tr_buf;
8892
8893 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8894 }
8895
smb3_is_transform_hdr(void * buf)8896 bool smb3_is_transform_hdr(void *buf)
8897 {
8898 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8899
8900 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8901 }
8902
smb3_decrypt_req(struct ksmbd_work * work)8903 int smb3_decrypt_req(struct ksmbd_work *work)
8904 {
8905 struct ksmbd_session *sess;
8906 char *buf = work->request_buf;
8907 unsigned int pdu_length = get_rfc1002_len(buf);
8908 struct kvec iov[2];
8909 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8910 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8911 int rc = 0;
8912
8913 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8914 buf_data_size < sizeof(struct smb2_hdr)) {
8915 pr_err("Transform message is too small (%u)\n",
8916 pdu_length);
8917 return -ECONNABORTED;
8918 }
8919
8920 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8921 pr_err("Transform message is broken\n");
8922 return -ECONNABORTED;
8923 }
8924
8925 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8926 if (!sess) {
8927 pr_err("invalid session id(%llx) in transform header\n",
8928 le64_to_cpu(tr_hdr->SessionId));
8929 return -ECONNABORTED;
8930 }
8931
8932 iov[0].iov_base = buf;
8933 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8934 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8935 iov[1].iov_len = buf_data_size;
8936 rc = ksmbd_crypt_message(work, iov, 2, 0);
8937 if (rc)
8938 return rc;
8939
8940 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8941 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8942
8943 return rc;
8944 }
8945
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)8946 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8947 {
8948 struct ksmbd_conn *conn = work->conn;
8949 struct ksmbd_session *sess = work->sess;
8950 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8951
8952 if (conn->dialect < SMB30_PROT_ID)
8953 return false;
8954
8955 if (work->next_smb2_rcv_hdr_off)
8956 rsp = ksmbd_resp_buf_next(work);
8957
8958 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8959 sess->user && !user_guest(sess->user) &&
8960 rsp->Status == STATUS_SUCCESS)
8961 return true;
8962 return false;
8963 }
8964