xref: /linux/fs/smb/server/smb2pdu.c (revision 1238f0af13495e14e1f40d011b9b7b414bf387fe)
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 "../common/smb2status.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 #include "transport_tcp.h"
42 
__wbuf(struct ksmbd_work * work,void ** req,void ** rsp)43 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
44 {
45 	if (work->next_smb2_rcv_hdr_off) {
46 		*req = ksmbd_req_buf_next(work);
47 		*rsp = ksmbd_resp_buf_next(work);
48 	} else {
49 		*req = smb2_get_msg(work->request_buf);
50 		*rsp = smb2_get_msg(work->response_buf);
51 	}
52 }
53 
54 #define WORK_BUFFERS(w, rq, rs)	__wbuf((w), (void **)&(rq), (void **)&(rs))
55 
56 /**
57  * check_session_id() - check for valid session id in smb header
58  * @conn:	connection instance
59  * @id:		session id from smb header
60  *
61  * Return:      1 if valid session id, otherwise 0
62  */
check_session_id(struct ksmbd_conn * conn,u64 id)63 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
64 {
65 	struct ksmbd_session *sess;
66 
67 	if (id == 0 || id == -1)
68 		return false;
69 
70 	sess = ksmbd_session_lookup_all(conn, id);
71 	if (sess) {
72 		ksmbd_user_session_put(sess);
73 		return true;
74 	}
75 	pr_err("Invalid user session id: %llu\n", id);
76 	return false;
77 }
78 
lookup_chann_list(struct ksmbd_session * sess,struct ksmbd_conn * conn)79 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
80 {
81 	return xa_load(&sess->ksmbd_chann_list, (long)conn);
82 }
83 
84 /**
85  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
86  * @work:	smb work
87  *
88  * Return:	0 if there is a tree connection matched or these are
89  *		skipable commands, otherwise error
90  */
smb2_get_ksmbd_tcon(struct ksmbd_work * work)91 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
92 {
93 	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
94 	unsigned int cmd = le16_to_cpu(req_hdr->Command);
95 	unsigned int tree_id;
96 
97 	if (cmd == SMB2_TREE_CONNECT_HE ||
98 	    cmd ==  SMB2_CANCEL_HE ||
99 	    cmd ==  SMB2_LOGOFF_HE) {
100 		ksmbd_debug(SMB, "skip to check tree connect request\n");
101 		return 0;
102 	}
103 
104 	if (xa_empty(&work->sess->tree_conns)) {
105 		ksmbd_debug(SMB, "NO tree connected\n");
106 		return -ENOENT;
107 	}
108 
109 	tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
110 
111 	/*
112 	 * If request is not the first in Compound request,
113 	 * Just validate tree id in header with work->tcon->id.
114 	 */
115 	if (work->next_smb2_rcv_hdr_off) {
116 		if (!work->tcon) {
117 			pr_err("The first operation in the compound does not have tcon\n");
118 			return -EINVAL;
119 		}
120 		if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
121 			pr_err("tree id(%u) is different with id(%u) in first operation\n",
122 					tree_id, work->tcon->id);
123 			return -EINVAL;
124 		}
125 		return 1;
126 	}
127 
128 	work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
129 	if (!work->tcon) {
130 		pr_err("Invalid tid %d\n", tree_id);
131 		return -ENOENT;
132 	}
133 
134 	return 1;
135 }
136 
137 /**
138  * smb2_set_err_rsp() - set error response code on smb response
139  * @work:	smb work containing response buffer
140  */
smb2_set_err_rsp(struct ksmbd_work * work)141 void smb2_set_err_rsp(struct ksmbd_work *work)
142 {
143 	struct smb2_err_rsp *err_rsp;
144 
145 	if (work->next_smb2_rcv_hdr_off)
146 		err_rsp = ksmbd_resp_buf_next(work);
147 	else
148 		err_rsp = smb2_get_msg(work->response_buf);
149 
150 	if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
151 		int err;
152 
153 		err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
154 		err_rsp->ErrorContextCount = 0;
155 		err_rsp->Reserved = 0;
156 		err_rsp->ByteCount = 0;
157 		err_rsp->ErrorData[0] = 0;
158 		err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
159 					__SMB2_HEADER_STRUCTURE_SIZE +
160 						SMB2_ERROR_STRUCTURE_SIZE2);
161 		if (err)
162 			work->send_no_response = 1;
163 	}
164 }
165 
166 /**
167  * is_smb2_neg_cmd() - is it smb2 negotiation command
168  * @work:	smb work containing smb header
169  *
170  * Return:      true if smb2 negotiation command, otherwise false
171  */
is_smb2_neg_cmd(struct ksmbd_work * work)172 bool is_smb2_neg_cmd(struct ksmbd_work *work)
173 {
174 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
175 
176 	/* is it SMB2 header ? */
177 	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
178 		return false;
179 
180 	/* make sure it is request not response message */
181 	if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
182 		return false;
183 
184 	if (hdr->Command != SMB2_NEGOTIATE)
185 		return false;
186 
187 	return true;
188 }
189 
190 /**
191  * is_smb2_rsp() - is it smb2 response
192  * @work:	smb work containing smb response buffer
193  *
194  * Return:      true if smb2 response, otherwise false
195  */
is_smb2_rsp(struct ksmbd_work * work)196 bool is_smb2_rsp(struct ksmbd_work *work)
197 {
198 	struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
199 
200 	/* is it SMB2 header ? */
201 	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
202 		return false;
203 
204 	/* make sure it is response not request message */
205 	if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
206 		return false;
207 
208 	return true;
209 }
210 
211 /**
212  * get_smb2_cmd_val() - get smb command code from smb header
213  * @work:	smb work containing smb request buffer
214  *
215  * Return:      smb2 request command value
216  */
get_smb2_cmd_val(struct ksmbd_work * work)217 u16 get_smb2_cmd_val(struct ksmbd_work *work)
218 {
219 	struct smb2_hdr *rcv_hdr;
220 
221 	if (work->next_smb2_rcv_hdr_off)
222 		rcv_hdr = ksmbd_req_buf_next(work);
223 	else
224 		rcv_hdr = smb2_get_msg(work->request_buf);
225 	return le16_to_cpu(rcv_hdr->Command);
226 }
227 
228 /**
229  * set_smb2_rsp_status() - set error response code on smb2 header
230  * @work:	smb work containing response buffer
231  * @err:	error response code
232  */
set_smb2_rsp_status(struct ksmbd_work * work,__le32 err)233 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
234 {
235 	struct smb2_hdr *rsp_hdr;
236 
237 	rsp_hdr = smb2_get_msg(work->response_buf);
238 	rsp_hdr->Status = err;
239 
240 	work->iov_idx = 0;
241 	work->iov_cnt = 0;
242 	work->next_smb2_rcv_hdr_off = 0;
243 	smb2_set_err_rsp(work);
244 }
245 
246 /**
247  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
248  * @work:	smb work containing smb request buffer
249  *
250  * smb2 negotiate response is sent in reply of smb1 negotiate command for
251  * dialect auto-negotiation.
252  */
init_smb2_neg_rsp(struct ksmbd_work * work)253 int init_smb2_neg_rsp(struct ksmbd_work *work)
254 {
255 	struct smb2_hdr *rsp_hdr;
256 	struct smb2_negotiate_rsp *rsp;
257 	struct ksmbd_conn *conn = work->conn;
258 	int err;
259 
260 	rsp_hdr = smb2_get_msg(work->response_buf);
261 	memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
262 	rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
263 	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
264 	rsp_hdr->CreditRequest = cpu_to_le16(2);
265 	rsp_hdr->Command = SMB2_NEGOTIATE;
266 	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
267 	rsp_hdr->NextCommand = 0;
268 	rsp_hdr->MessageId = 0;
269 	rsp_hdr->Id.SyncId.ProcessId = 0;
270 	rsp_hdr->Id.SyncId.TreeId = 0;
271 	rsp_hdr->SessionId = 0;
272 	memset(rsp_hdr->Signature, 0, 16);
273 
274 	rsp = smb2_get_msg(work->response_buf);
275 
276 	WARN_ON(ksmbd_conn_good(conn));
277 
278 	rsp->StructureSize = cpu_to_le16(65);
279 	ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
280 	rsp->DialectRevision = cpu_to_le16(conn->dialect);
281 	/* Not setting conn guid rsp->ServerGUID, as it
282 	 * not used by client for identifying connection
283 	 */
284 	rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
285 	/* Default Max Message Size till SMB2.0, 64K*/
286 	rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
287 	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
288 	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
289 
290 	rsp->SystemTime = cpu_to_le64(ksmbd_systime());
291 	rsp->ServerStartTime = 0;
292 
293 	rsp->SecurityBufferOffset = cpu_to_le16(128);
294 	rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
295 	ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
296 		le16_to_cpu(rsp->SecurityBufferOffset));
297 	rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
298 	if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
299 		rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
300 	err = ksmbd_iov_pin_rsp(work, rsp,
301 				sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
302 	if (err)
303 		return err;
304 	conn->use_spnego = true;
305 
306 	ksmbd_conn_set_need_negotiate(conn);
307 	return 0;
308 }
309 
310 /**
311  * smb2_set_rsp_credits() - set number of credits in response buffer
312  * @work:	smb work containing smb response buffer
313  */
smb2_set_rsp_credits(struct ksmbd_work * work)314 int smb2_set_rsp_credits(struct ksmbd_work *work)
315 {
316 	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
317 	struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
318 	struct ksmbd_conn *conn = work->conn;
319 	unsigned short credits_requested, aux_max;
320 	unsigned short credit_charge, credits_granted = 0;
321 
322 	if (work->send_no_response)
323 		return 0;
324 
325 	hdr->CreditCharge = req_hdr->CreditCharge;
326 
327 	if (conn->total_credits > conn->vals->max_credits) {
328 		hdr->CreditRequest = 0;
329 		pr_err("Total credits overflow: %d\n", conn->total_credits);
330 		return -EINVAL;
331 	}
332 
333 	credit_charge = max_t(unsigned short,
334 			      le16_to_cpu(req_hdr->CreditCharge), 1);
335 	if (credit_charge > conn->total_credits) {
336 		ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
337 			    credit_charge, conn->total_credits);
338 		return -EINVAL;
339 	}
340 
341 	conn->total_credits -= credit_charge;
342 	conn->outstanding_credits -= credit_charge;
343 	credits_requested = max_t(unsigned short,
344 				  le16_to_cpu(req_hdr->CreditRequest), 1);
345 
346 	/* according to smb2.credits smbtorture, Windows server
347 	 * 2016 or later grant up to 8192 credits at once.
348 	 *
349 	 * TODO: Need to adjuct CreditRequest value according to
350 	 * current cpu load
351 	 */
352 	if (hdr->Command == SMB2_NEGOTIATE)
353 		aux_max = 1;
354 	else
355 		aux_max = conn->vals->max_credits - conn->total_credits;
356 	credits_granted = min_t(unsigned short, credits_requested, aux_max);
357 
358 	conn->total_credits += credits_granted;
359 	work->credits_granted += credits_granted;
360 
361 	if (!req_hdr->NextCommand) {
362 		/* Update CreditRequest in last request */
363 		hdr->CreditRequest = cpu_to_le16(work->credits_granted);
364 	}
365 	ksmbd_debug(SMB,
366 		    "credits: requested[%d] granted[%d] total_granted[%d]\n",
367 		    credits_requested, credits_granted,
368 		    conn->total_credits);
369 	return 0;
370 }
371 
372 /**
373  * init_chained_smb2_rsp() - initialize smb2 chained response
374  * @work:	smb work containing smb response buffer
375  */
init_chained_smb2_rsp(struct ksmbd_work * work)376 static void init_chained_smb2_rsp(struct ksmbd_work *work)
377 {
378 	struct smb2_hdr *req = ksmbd_req_buf_next(work);
379 	struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
380 	struct smb2_hdr *rsp_hdr;
381 	struct smb2_hdr *rcv_hdr;
382 	int next_hdr_offset = 0;
383 	int len, new_len;
384 
385 	/* Len of this response = updated RFC len - offset of previous cmd
386 	 * in the compound rsp
387 	 */
388 
389 	/* Storing the current local FID which may be needed by subsequent
390 	 * command in the compound request
391 	 */
392 	if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
393 		work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
394 		work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
395 		work->compound_sid = le64_to_cpu(rsp->SessionId);
396 	}
397 
398 	len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
399 	next_hdr_offset = le32_to_cpu(req->NextCommand);
400 
401 	new_len = ALIGN(len, 8);
402 	work->iov[work->iov_idx].iov_len += (new_len - len);
403 	inc_rfc1001_len(work->response_buf, new_len - len);
404 	rsp->NextCommand = cpu_to_le32(new_len);
405 
406 	work->next_smb2_rcv_hdr_off += next_hdr_offset;
407 	work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
408 	work->next_smb2_rsp_hdr_off += new_len;
409 	ksmbd_debug(SMB,
410 		    "Compound req new_len = %d rcv off = %d rsp off = %d\n",
411 		    new_len, work->next_smb2_rcv_hdr_off,
412 		    work->next_smb2_rsp_hdr_off);
413 
414 	rsp_hdr = ksmbd_resp_buf_next(work);
415 	rcv_hdr = ksmbd_req_buf_next(work);
416 
417 	if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
418 		ksmbd_debug(SMB, "related flag should be set\n");
419 		work->compound_fid = KSMBD_NO_FID;
420 		work->compound_pfid = KSMBD_NO_FID;
421 	}
422 	memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
423 	rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
424 	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
425 	rsp_hdr->Command = rcv_hdr->Command;
426 
427 	/*
428 	 * Message is response. We don't grant oplock yet.
429 	 */
430 	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
431 				SMB2_FLAGS_RELATED_OPERATIONS);
432 	rsp_hdr->NextCommand = 0;
433 	rsp_hdr->MessageId = rcv_hdr->MessageId;
434 	rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
435 	rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
436 	rsp_hdr->SessionId = rcv_hdr->SessionId;
437 	memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
438 }
439 
440 /**
441  * is_chained_smb2_message() - check for chained command
442  * @work:	smb work containing smb request buffer
443  *
444  * Return:      true if chained request, otherwise false
445  */
is_chained_smb2_message(struct ksmbd_work * work)446 bool is_chained_smb2_message(struct ksmbd_work *work)
447 {
448 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
449 	unsigned int len, next_cmd;
450 
451 	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
452 		return false;
453 
454 	hdr = ksmbd_req_buf_next(work);
455 	next_cmd = le32_to_cpu(hdr->NextCommand);
456 	if (next_cmd > 0) {
457 		if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
458 			__SMB2_HEADER_STRUCTURE_SIZE >
459 		    get_rfc1002_len(work->request_buf)) {
460 			pr_err("next command(%u) offset exceeds smb msg size\n",
461 			       next_cmd);
462 			return false;
463 		}
464 
465 		if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
466 		    work->response_sz) {
467 			pr_err("next response offset exceeds response buffer size\n");
468 			return false;
469 		}
470 
471 		ksmbd_debug(SMB, "got SMB2 chained command\n");
472 		init_chained_smb2_rsp(work);
473 		return true;
474 	} else if (work->next_smb2_rcv_hdr_off) {
475 		/*
476 		 * This is last request in chained command,
477 		 * align response to 8 byte
478 		 */
479 		len = ALIGN(get_rfc1002_len(work->response_buf), 8);
480 		len = len - get_rfc1002_len(work->response_buf);
481 		if (len) {
482 			ksmbd_debug(SMB, "padding len %u\n", len);
483 			work->iov[work->iov_idx].iov_len += len;
484 			inc_rfc1001_len(work->response_buf, len);
485 		}
486 		work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
487 	}
488 	return false;
489 }
490 
491 /**
492  * init_smb2_rsp_hdr() - initialize smb2 response
493  * @work:	smb work containing smb request buffer
494  *
495  * Return:      0
496  */
init_smb2_rsp_hdr(struct ksmbd_work * work)497 int init_smb2_rsp_hdr(struct ksmbd_work *work)
498 {
499 	struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
500 	struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
501 
502 	memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
503 	rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
504 	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
505 	rsp_hdr->Command = rcv_hdr->Command;
506 
507 	/*
508 	 * Message is response. We don't grant oplock yet.
509 	 */
510 	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
511 	rsp_hdr->NextCommand = 0;
512 	rsp_hdr->MessageId = rcv_hdr->MessageId;
513 	rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
514 	rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
515 	rsp_hdr->SessionId = rcv_hdr->SessionId;
516 	memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
517 
518 	return 0;
519 }
520 
521 /**
522  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
523  * @work:	smb work containing smb request buffer
524  *
525  * Return:      0 on success, otherwise error
526  */
smb2_allocate_rsp_buf(struct ksmbd_work * work)527 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
528 {
529 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
530 	size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
531 	size_t large_sz = small_sz + work->conn->vals->max_trans_size;
532 	size_t sz = small_sz;
533 	int cmd = le16_to_cpu(hdr->Command);
534 
535 	if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
536 		sz = large_sz;
537 
538 	if (cmd == SMB2_QUERY_INFO_HE) {
539 		struct smb2_query_info_req *req;
540 
541 		if (get_rfc1002_len(work->request_buf) <
542 		    offsetof(struct smb2_query_info_req, OutputBufferLength))
543 			return -EINVAL;
544 
545 		req = smb2_get_msg(work->request_buf);
546 		if ((req->InfoType == SMB2_O_INFO_FILE &&
547 		     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
548 		     req->FileInfoClass == FILE_ALL_INFORMATION)) ||
549 		    req->InfoType == SMB2_O_INFO_SECURITY)
550 			sz = large_sz;
551 	}
552 
553 	/* allocate large response buf for chained commands */
554 	if (le32_to_cpu(hdr->NextCommand) > 0)
555 		sz = large_sz;
556 
557 	work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP);
558 	if (!work->response_buf)
559 		return -ENOMEM;
560 
561 	work->response_sz = sz;
562 	return 0;
563 }
564 
565 /**
566  * smb2_check_user_session() - check for valid session for a user
567  * @work:	smb work containing smb request buffer
568  *
569  * Return:      0 on success, otherwise error
570  */
smb2_check_user_session(struct ksmbd_work * work)571 int smb2_check_user_session(struct ksmbd_work *work)
572 {
573 	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
574 	struct ksmbd_conn *conn = work->conn;
575 	unsigned int cmd = le16_to_cpu(req_hdr->Command);
576 	unsigned long long sess_id;
577 
578 	/*
579 	 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
580 	 * require a session id, so no need to validate user session's for
581 	 * these commands.
582 	 */
583 	if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
584 	    cmd == SMB2_SESSION_SETUP_HE)
585 		return 0;
586 
587 	if (!ksmbd_conn_good(conn))
588 		return -EIO;
589 
590 	sess_id = le64_to_cpu(req_hdr->SessionId);
591 
592 	/*
593 	 * If request is not the first in Compound request,
594 	 * Just validate session id in header with work->sess->id.
595 	 */
596 	if (work->next_smb2_rcv_hdr_off) {
597 		if (!work->sess) {
598 			pr_err("The first operation in the compound does not have sess\n");
599 			return -EINVAL;
600 		}
601 		if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
602 			pr_err("session id(%llu) is different with the first operation(%lld)\n",
603 					sess_id, work->sess->id);
604 			return -EINVAL;
605 		}
606 		return 1;
607 	}
608 
609 	/* Check for validity of user session */
610 	work->sess = ksmbd_session_lookup_all(conn, sess_id);
611 	if (work->sess)
612 		return 1;
613 	ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
614 	return -ENOENT;
615 }
616 
617 /**
618  * smb2_get_name() - get filename string from on the wire smb format
619  * @src:	source buffer
620  * @maxlen:	maxlen of source string
621  * @local_nls:	nls_table pointer
622  *
623  * Return:      matching converted filename on success, otherwise error ptr
624  */
625 static char *
smb2_get_name(const char * src,const int maxlen,struct nls_table * local_nls)626 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
627 {
628 	char *name;
629 
630 	name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
631 	if (IS_ERR(name)) {
632 		pr_err("failed to get name %ld\n", PTR_ERR(name));
633 		return name;
634 	}
635 
636 	if (*name == '\\') {
637 		pr_err("not allow directory name included leading slash\n");
638 		kfree(name);
639 		return ERR_PTR(-EINVAL);
640 	}
641 
642 	ksmbd_conv_path_to_unix(name);
643 	ksmbd_strip_last_slash(name);
644 	return name;
645 }
646 
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)647 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
648 {
649 	struct ksmbd_conn *conn = work->conn;
650 	int id;
651 
652 	id = ksmbd_acquire_async_msg_id(&conn->async_ida);
653 	if (id < 0) {
654 		pr_err("Failed to alloc async message id\n");
655 		return id;
656 	}
657 	work->asynchronous = true;
658 	work->async_id = id;
659 
660 	ksmbd_debug(SMB,
661 		    "Send interim Response to inform async request id : %d\n",
662 		    work->async_id);
663 
664 	work->cancel_fn = fn;
665 	work->cancel_argv = arg;
666 
667 	if (list_empty(&work->async_request_entry)) {
668 		spin_lock(&conn->request_lock);
669 		list_add_tail(&work->async_request_entry, &conn->async_requests);
670 		spin_unlock(&conn->request_lock);
671 	}
672 
673 	return 0;
674 }
675 
release_async_work(struct ksmbd_work * work)676 void release_async_work(struct ksmbd_work *work)
677 {
678 	struct ksmbd_conn *conn = work->conn;
679 
680 	spin_lock(&conn->request_lock);
681 	list_del_init(&work->async_request_entry);
682 	spin_unlock(&conn->request_lock);
683 
684 	work->asynchronous = 0;
685 	work->cancel_fn = NULL;
686 	kfree(work->cancel_argv);
687 	work->cancel_argv = NULL;
688 	if (work->async_id) {
689 		ksmbd_release_id(&conn->async_ida, work->async_id);
690 		work->async_id = 0;
691 	}
692 }
693 
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)694 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
695 {
696 	struct smb2_hdr *rsp_hdr;
697 	struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
698 
699 	if (!in_work)
700 		return;
701 
702 	if (allocate_interim_rsp_buf(in_work)) {
703 		pr_err("smb_allocate_rsp_buf failed!\n");
704 		ksmbd_free_work_struct(in_work);
705 		return;
706 	}
707 
708 	in_work->conn = work->conn;
709 	memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
710 	       __SMB2_HEADER_STRUCTURE_SIZE);
711 
712 	rsp_hdr = smb2_get_msg(in_work->response_buf);
713 	rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
714 	rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
715 	smb2_set_err_rsp(in_work);
716 	rsp_hdr->Status = status;
717 
718 	ksmbd_conn_write(in_work);
719 	ksmbd_free_work_struct(in_work);
720 }
721 
smb2_get_reparse_tag_special_file(umode_t mode)722 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
723 {
724 	if (S_ISDIR(mode) || S_ISREG(mode))
725 		return 0;
726 
727 	if (S_ISLNK(mode))
728 		return IO_REPARSE_TAG_LX_SYMLINK_LE;
729 	else if (S_ISFIFO(mode))
730 		return IO_REPARSE_TAG_LX_FIFO_LE;
731 	else if (S_ISSOCK(mode))
732 		return IO_REPARSE_TAG_AF_UNIX_LE;
733 	else if (S_ISCHR(mode))
734 		return IO_REPARSE_TAG_LX_CHR_LE;
735 	else if (S_ISBLK(mode))
736 		return IO_REPARSE_TAG_LX_BLK_LE;
737 
738 	return 0;
739 }
740 
741 /**
742  * smb2_get_dos_mode() - get file mode in dos format from unix mode
743  * @stat:	kstat containing file mode
744  * @attribute:	attribute flags
745  *
746  * Return:      converted dos mode
747  */
smb2_get_dos_mode(struct kstat * stat,int attribute)748 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
749 {
750 	int attr = 0;
751 
752 	if (S_ISDIR(stat->mode)) {
753 		attr = FILE_ATTRIBUTE_DIRECTORY |
754 			(attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
755 	} else {
756 		attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
757 		attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
758 		if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
759 				FILE_SUPPORTS_SPARSE_FILES))
760 			attr |= FILE_ATTRIBUTE_SPARSE_FILE;
761 
762 		if (smb2_get_reparse_tag_special_file(stat->mode))
763 			attr |= FILE_ATTRIBUTE_REPARSE_POINT;
764 	}
765 
766 	return attr;
767 }
768 
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)769 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
770 			       __le16 hash_id)
771 {
772 	pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
773 	pneg_ctxt->DataLength = cpu_to_le16(38);
774 	pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
775 	pneg_ctxt->Reserved = cpu_to_le32(0);
776 	pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
777 	get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
778 	pneg_ctxt->HashAlgorithms = hash_id;
779 }
780 
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)781 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
782 			       __le16 cipher_type)
783 {
784 	pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
785 	pneg_ctxt->DataLength = cpu_to_le16(4);
786 	pneg_ctxt->Reserved = cpu_to_le32(0);
787 	pneg_ctxt->CipherCount = cpu_to_le16(1);
788 	pneg_ctxt->Ciphers[0] = cipher_type;
789 }
790 
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)791 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
792 				__le16 sign_algo)
793 {
794 	pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
795 	pneg_ctxt->DataLength =
796 		cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
797 			- sizeof(struct smb2_neg_context));
798 	pneg_ctxt->Reserved = cpu_to_le32(0);
799 	pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
800 	pneg_ctxt->SigningAlgorithms[0] = sign_algo;
801 }
802 
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)803 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
804 {
805 	pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
806 	pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
807 	/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
808 	pneg_ctxt->Name[0] = 0x93;
809 	pneg_ctxt->Name[1] = 0xAD;
810 	pneg_ctxt->Name[2] = 0x25;
811 	pneg_ctxt->Name[3] = 0x50;
812 	pneg_ctxt->Name[4] = 0x9C;
813 	pneg_ctxt->Name[5] = 0xB4;
814 	pneg_ctxt->Name[6] = 0x11;
815 	pneg_ctxt->Name[7] = 0xE7;
816 	pneg_ctxt->Name[8] = 0xB4;
817 	pneg_ctxt->Name[9] = 0x23;
818 	pneg_ctxt->Name[10] = 0x83;
819 	pneg_ctxt->Name[11] = 0xDE;
820 	pneg_ctxt->Name[12] = 0x96;
821 	pneg_ctxt->Name[13] = 0x8B;
822 	pneg_ctxt->Name[14] = 0xCD;
823 	pneg_ctxt->Name[15] = 0x7C;
824 }
825 
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp)826 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
827 				  struct smb2_negotiate_rsp *rsp)
828 {
829 	char * const pneg_ctxt = (char *)rsp +
830 			le32_to_cpu(rsp->NegotiateContextOffset);
831 	int neg_ctxt_cnt = 1;
832 	int ctxt_size;
833 
834 	ksmbd_debug(SMB,
835 		    "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
836 	build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
837 			   conn->preauth_info->Preauth_HashId);
838 	ctxt_size = sizeof(struct smb2_preauth_neg_context);
839 
840 	if (conn->cipher_type) {
841 		/* Round to 8 byte boundary */
842 		ctxt_size = round_up(ctxt_size, 8);
843 		ksmbd_debug(SMB,
844 			    "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
845 		build_encrypt_ctxt((struct smb2_encryption_neg_context *)
846 				   (pneg_ctxt + ctxt_size),
847 				   conn->cipher_type);
848 		neg_ctxt_cnt++;
849 		ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
850 	}
851 
852 	/* compression context not yet supported */
853 	WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
854 
855 	if (conn->posix_ext_supported) {
856 		ctxt_size = round_up(ctxt_size, 8);
857 		ksmbd_debug(SMB,
858 			    "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
859 		build_posix_ctxt((struct smb2_posix_neg_context *)
860 				 (pneg_ctxt + ctxt_size));
861 		neg_ctxt_cnt++;
862 		ctxt_size += sizeof(struct smb2_posix_neg_context);
863 	}
864 
865 	if (conn->signing_negotiated) {
866 		ctxt_size = round_up(ctxt_size, 8);
867 		ksmbd_debug(SMB,
868 			    "assemble SMB2_SIGNING_CAPABILITIES context\n");
869 		build_sign_cap_ctxt((struct smb2_signing_capabilities *)
870 				    (pneg_ctxt + ctxt_size),
871 				    conn->signing_algorithm);
872 		neg_ctxt_cnt++;
873 		ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
874 	}
875 
876 	rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
877 	return ctxt_size + AUTH_GSS_PADDING;
878 }
879 
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt,int ctxt_len)880 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
881 				  struct smb2_preauth_neg_context *pneg_ctxt,
882 				  int ctxt_len)
883 {
884 	/*
885 	 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
886 	 * which may not be present. Only check for used HashAlgorithms[1].
887 	 */
888 	if (ctxt_len <
889 	    sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
890 		return STATUS_INVALID_PARAMETER;
891 
892 	if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
893 		return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
894 
895 	conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
896 	return STATUS_SUCCESS;
897 }
898 
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int ctxt_len)899 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
900 				struct smb2_encryption_neg_context *pneg_ctxt,
901 				int ctxt_len)
902 {
903 	int cph_cnt;
904 	int i, cphs_size;
905 
906 	if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
907 		pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
908 		return;
909 	}
910 
911 	conn->cipher_type = 0;
912 
913 	cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
914 	cphs_size = cph_cnt * sizeof(__le16);
915 
916 	if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
917 	    ctxt_len) {
918 		pr_err("Invalid cipher count(%d)\n", cph_cnt);
919 		return;
920 	}
921 
922 	if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
923 		return;
924 
925 	for (i = 0; i < cph_cnt; i++) {
926 		if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
927 		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
928 		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
929 		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
930 			ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
931 				    pneg_ctxt->Ciphers[i]);
932 			conn->cipher_type = pneg_ctxt->Ciphers[i];
933 			break;
934 		}
935 	}
936 }
937 
938 /**
939  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
940  * @conn:	smb connection
941  *
942  * Return:	true if connection should be encrypted, else false
943  */
smb3_encryption_negotiated(struct ksmbd_conn * conn)944 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
945 {
946 	if (!conn->ops->generate_encryptionkey)
947 		return false;
948 
949 	/*
950 	 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
951 	 * SMB 3.1.1 uses the cipher_type field.
952 	 */
953 	return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
954 	    conn->cipher_type;
955 }
956 
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)957 static void decode_compress_ctxt(struct ksmbd_conn *conn,
958 				 struct smb2_compression_capabilities_context *pneg_ctxt)
959 {
960 	conn->compress_algorithm = SMB3_COMPRESS_NONE;
961 }
962 
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int ctxt_len)963 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
964 				 struct smb2_signing_capabilities *pneg_ctxt,
965 				 int ctxt_len)
966 {
967 	int sign_algo_cnt;
968 	int i, sign_alos_size;
969 
970 	if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
971 		pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
972 		return;
973 	}
974 
975 	conn->signing_negotiated = false;
976 	sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
977 	sign_alos_size = sign_algo_cnt * sizeof(__le16);
978 
979 	if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
980 	    ctxt_len) {
981 		pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
982 		return;
983 	}
984 
985 	for (i = 0; i < sign_algo_cnt; i++) {
986 		if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
987 		    pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
988 			ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
989 				    pneg_ctxt->SigningAlgorithms[i]);
990 			conn->signing_negotiated = true;
991 			conn->signing_algorithm =
992 				pneg_ctxt->SigningAlgorithms[i];
993 			break;
994 		}
995 	}
996 }
997 
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,unsigned int len_of_smb)998 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
999 				      struct smb2_negotiate_req *req,
1000 				      unsigned int len_of_smb)
1001 {
1002 	/* +4 is to account for the RFC1001 len field */
1003 	struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1004 	int i = 0, len_of_ctxts;
1005 	unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1006 	unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1007 	__le32 status = STATUS_INVALID_PARAMETER;
1008 
1009 	ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1010 	if (len_of_smb <= offset) {
1011 		ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1012 		return status;
1013 	}
1014 
1015 	len_of_ctxts = len_of_smb - offset;
1016 
1017 	while (i++ < neg_ctxt_cnt) {
1018 		int clen, ctxt_len;
1019 
1020 		if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1021 			break;
1022 
1023 		pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1024 		clen = le16_to_cpu(pctx->DataLength);
1025 		ctxt_len = clen + sizeof(struct smb2_neg_context);
1026 
1027 		if (ctxt_len > len_of_ctxts)
1028 			break;
1029 
1030 		if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1031 			ksmbd_debug(SMB,
1032 				    "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1033 			if (conn->preauth_info->Preauth_HashId)
1034 				break;
1035 
1036 			status = decode_preauth_ctxt(conn,
1037 						     (struct smb2_preauth_neg_context *)pctx,
1038 						     ctxt_len);
1039 			if (status != STATUS_SUCCESS)
1040 				break;
1041 		} else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1042 			ksmbd_debug(SMB,
1043 				    "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1044 			if (conn->cipher_type)
1045 				break;
1046 
1047 			decode_encrypt_ctxt(conn,
1048 					    (struct smb2_encryption_neg_context *)pctx,
1049 					    ctxt_len);
1050 		} else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1051 			ksmbd_debug(SMB,
1052 				    "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1053 			if (conn->compress_algorithm)
1054 				break;
1055 
1056 			decode_compress_ctxt(conn,
1057 					     (struct smb2_compression_capabilities_context *)pctx);
1058 		} else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1059 			ksmbd_debug(SMB,
1060 				    "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1061 		} else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1062 			ksmbd_debug(SMB,
1063 				    "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1064 			conn->posix_ext_supported = true;
1065 		} else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1066 			ksmbd_debug(SMB,
1067 				    "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1068 
1069 			decode_sign_cap_ctxt(conn,
1070 					     (struct smb2_signing_capabilities *)pctx,
1071 					     ctxt_len);
1072 		}
1073 
1074 		/* offsets must be 8 byte aligned */
1075 		offset = (ctxt_len + 7) & ~0x7;
1076 		len_of_ctxts -= offset;
1077 	}
1078 	return status;
1079 }
1080 
1081 /**
1082  * smb2_handle_negotiate() - handler for smb2 negotiate command
1083  * @work:	smb work containing smb request buffer
1084  *
1085  * Return:      0
1086  */
smb2_handle_negotiate(struct ksmbd_work * work)1087 int smb2_handle_negotiate(struct ksmbd_work *work)
1088 {
1089 	struct ksmbd_conn *conn = work->conn;
1090 	struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1091 	struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1092 	int rc = 0;
1093 	unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1094 	__le32 status;
1095 
1096 	ksmbd_debug(SMB, "Received negotiate request\n");
1097 	conn->need_neg = false;
1098 	if (ksmbd_conn_good(conn)) {
1099 		pr_err("conn->tcp_status is already in CifsGood State\n");
1100 		work->send_no_response = 1;
1101 		return rc;
1102 	}
1103 
1104 	ksmbd_conn_lock(conn);
1105 	smb2_buf_len = get_rfc1002_len(work->request_buf);
1106 	smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1107 	if (smb2_neg_size > smb2_buf_len) {
1108 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1109 		rc = -EINVAL;
1110 		goto err_out;
1111 	}
1112 
1113 	if (req->DialectCount == 0) {
1114 		pr_err("malformed packet\n");
1115 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1116 		rc = -EINVAL;
1117 		goto err_out;
1118 	}
1119 
1120 	if (conn->dialect == SMB311_PROT_ID) {
1121 		unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1122 
1123 		if (smb2_buf_len < nego_ctxt_off) {
1124 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1125 			rc = -EINVAL;
1126 			goto err_out;
1127 		}
1128 
1129 		if (smb2_neg_size > nego_ctxt_off) {
1130 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1131 			rc = -EINVAL;
1132 			goto err_out;
1133 		}
1134 
1135 		if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1136 		    nego_ctxt_off) {
1137 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138 			rc = -EINVAL;
1139 			goto err_out;
1140 		}
1141 	} else {
1142 		if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1143 		    smb2_buf_len) {
1144 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1145 			rc = -EINVAL;
1146 			goto err_out;
1147 		}
1148 	}
1149 
1150 	conn->cli_cap = le32_to_cpu(req->Capabilities);
1151 	switch (conn->dialect) {
1152 	case SMB311_PROT_ID:
1153 		conn->preauth_info =
1154 			kzalloc(sizeof(struct preauth_integrity_info),
1155 				KSMBD_DEFAULT_GFP);
1156 		if (!conn->preauth_info) {
1157 			rc = -ENOMEM;
1158 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1159 			goto err_out;
1160 		}
1161 
1162 		status = deassemble_neg_contexts(conn, req,
1163 						 get_rfc1002_len(work->request_buf));
1164 		if (status != STATUS_SUCCESS) {
1165 			pr_err("deassemble_neg_contexts error(0x%x)\n",
1166 			       status);
1167 			rsp->hdr.Status = status;
1168 			rc = -EINVAL;
1169 			kfree(conn->preauth_info);
1170 			conn->preauth_info = NULL;
1171 			goto err_out;
1172 		}
1173 
1174 		rc = init_smb3_11_server(conn);
1175 		if (rc < 0) {
1176 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1177 			kfree(conn->preauth_info);
1178 			conn->preauth_info = NULL;
1179 			goto err_out;
1180 		}
1181 
1182 		ksmbd_gen_preauth_integrity_hash(conn,
1183 						 work->request_buf,
1184 						 conn->preauth_info->Preauth_HashValue);
1185 		rsp->NegotiateContextOffset =
1186 				cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1187 		neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1188 		break;
1189 	case SMB302_PROT_ID:
1190 		init_smb3_02_server(conn);
1191 		break;
1192 	case SMB30_PROT_ID:
1193 		init_smb3_0_server(conn);
1194 		break;
1195 	case SMB21_PROT_ID:
1196 		init_smb2_1_server(conn);
1197 		break;
1198 	case SMB2X_PROT_ID:
1199 	case BAD_PROT_ID:
1200 	default:
1201 		ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1202 			    conn->dialect);
1203 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1204 		rc = -EINVAL;
1205 		goto err_out;
1206 	}
1207 	rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1208 
1209 	/* For stats */
1210 	conn->connection_type = conn->dialect;
1211 
1212 	rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1213 	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1214 	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1215 
1216 	memcpy(conn->ClientGUID, req->ClientGUID,
1217 			SMB2_CLIENT_GUID_SIZE);
1218 	conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1219 
1220 	rsp->StructureSize = cpu_to_le16(65);
1221 	rsp->DialectRevision = cpu_to_le16(conn->dialect);
1222 	/* Not setting conn guid rsp->ServerGUID, as it
1223 	 * not used by client for identifying server
1224 	 */
1225 	memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1226 
1227 	rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1228 	rsp->ServerStartTime = 0;
1229 	ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1230 		    le32_to_cpu(rsp->NegotiateContextOffset),
1231 		    le16_to_cpu(rsp->NegotiateContextCount));
1232 
1233 	rsp->SecurityBufferOffset = cpu_to_le16(128);
1234 	rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1235 	ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1236 				  le16_to_cpu(rsp->SecurityBufferOffset));
1237 
1238 	rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1239 	conn->use_spnego = true;
1240 
1241 	if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1242 	     server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1243 	    req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1244 		conn->sign = true;
1245 	else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1246 		server_conf.enforced_signing = true;
1247 		rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1248 		conn->sign = true;
1249 	}
1250 
1251 	conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1252 	ksmbd_conn_set_need_negotiate(conn);
1253 
1254 err_out:
1255 	ksmbd_conn_unlock(conn);
1256 	if (rc)
1257 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1258 
1259 	if (!rc)
1260 		rc = ksmbd_iov_pin_rsp(work, rsp,
1261 				       sizeof(struct smb2_negotiate_rsp) +
1262 					AUTH_GSS_LENGTH + neg_ctxt_len);
1263 	if (rc < 0)
1264 		smb2_set_err_rsp(work);
1265 	return rc;
1266 }
1267 
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1268 static int alloc_preauth_hash(struct ksmbd_session *sess,
1269 			      struct ksmbd_conn *conn)
1270 {
1271 	if (sess->Preauth_HashValue)
1272 		return 0;
1273 
1274 	sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1275 					  PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP);
1276 	if (!sess->Preauth_HashValue)
1277 		return -ENOMEM;
1278 
1279 	return 0;
1280 }
1281 
generate_preauth_hash(struct ksmbd_work * work)1282 static int generate_preauth_hash(struct ksmbd_work *work)
1283 {
1284 	struct ksmbd_conn *conn = work->conn;
1285 	struct ksmbd_session *sess = work->sess;
1286 	u8 *preauth_hash;
1287 
1288 	if (conn->dialect != SMB311_PROT_ID)
1289 		return 0;
1290 
1291 	if (conn->binding) {
1292 		struct preauth_session *preauth_sess;
1293 
1294 		preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1295 		if (!preauth_sess) {
1296 			preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1297 			if (!preauth_sess)
1298 				return -ENOMEM;
1299 		}
1300 
1301 		preauth_hash = preauth_sess->Preauth_HashValue;
1302 	} else {
1303 		if (!sess->Preauth_HashValue)
1304 			if (alloc_preauth_hash(sess, conn))
1305 				return -ENOMEM;
1306 		preauth_hash = sess->Preauth_HashValue;
1307 	}
1308 
1309 	ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1310 	return 0;
1311 }
1312 
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1313 static int decode_negotiation_token(struct ksmbd_conn *conn,
1314 				    struct negotiate_message *negblob,
1315 				    size_t sz)
1316 {
1317 	if (!conn->use_spnego)
1318 		return -EINVAL;
1319 
1320 	if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1321 		if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1322 			conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1323 			conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1324 			conn->use_spnego = false;
1325 		}
1326 	}
1327 	return 0;
1328 }
1329 
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len,struct smb2_sess_setup_rsp * rsp)1330 static int ntlm_negotiate(struct ksmbd_work *work,
1331 			  struct negotiate_message *negblob,
1332 			  size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1333 {
1334 	struct challenge_message *chgblob;
1335 	unsigned char *spnego_blob = NULL;
1336 	u16 spnego_blob_len;
1337 	char *neg_blob;
1338 	int sz, rc;
1339 
1340 	ksmbd_debug(SMB, "negotiate phase\n");
1341 	rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1342 	if (rc)
1343 		return rc;
1344 
1345 	sz = le16_to_cpu(rsp->SecurityBufferOffset);
1346 	chgblob = (struct challenge_message *)rsp->Buffer;
1347 	memset(chgblob, 0, sizeof(struct challenge_message));
1348 
1349 	if (!work->conn->use_spnego) {
1350 		sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1351 		if (sz < 0)
1352 			return -ENOMEM;
1353 
1354 		rsp->SecurityBufferLength = cpu_to_le16(sz);
1355 		return 0;
1356 	}
1357 
1358 	sz = sizeof(struct challenge_message);
1359 	sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1360 
1361 	neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP);
1362 	if (!neg_blob)
1363 		return -ENOMEM;
1364 
1365 	chgblob = (struct challenge_message *)neg_blob;
1366 	sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1367 	if (sz < 0) {
1368 		rc = -ENOMEM;
1369 		goto out;
1370 	}
1371 
1372 	rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1373 					   neg_blob, sz);
1374 	if (rc) {
1375 		rc = -ENOMEM;
1376 		goto out;
1377 	}
1378 
1379 	memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1380 	rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1381 
1382 out:
1383 	kfree(spnego_blob);
1384 	kfree(neg_blob);
1385 	return rc;
1386 }
1387 
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1388 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1389 						  struct smb2_sess_setup_req *req)
1390 {
1391 	int sz;
1392 
1393 	if (conn->use_spnego && conn->mechToken)
1394 		return (struct authenticate_message *)conn->mechToken;
1395 
1396 	sz = le16_to_cpu(req->SecurityBufferOffset);
1397 	return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1398 					       + sz);
1399 }
1400 
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1401 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1402 				       struct smb2_sess_setup_req *req)
1403 {
1404 	struct authenticate_message *authblob;
1405 	struct ksmbd_user *user;
1406 	char *name;
1407 	unsigned int name_off, name_len, secbuf_len;
1408 
1409 	if (conn->use_spnego && conn->mechToken)
1410 		secbuf_len = conn->mechTokenLen;
1411 	else
1412 		secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1413 	if (secbuf_len < sizeof(struct authenticate_message)) {
1414 		ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1415 		return NULL;
1416 	}
1417 	authblob = user_authblob(conn, req);
1418 	name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1419 	name_len = le16_to_cpu(authblob->UserName.Length);
1420 
1421 	if (secbuf_len < (u64)name_off + name_len)
1422 		return NULL;
1423 
1424 	name = smb_strndup_from_utf16((const char *)authblob + name_off,
1425 				      name_len,
1426 				      true,
1427 				      conn->local_nls);
1428 	if (IS_ERR(name)) {
1429 		pr_err("cannot allocate memory\n");
1430 		return NULL;
1431 	}
1432 
1433 	ksmbd_debug(SMB, "session setup request for user %s\n", name);
1434 	user = ksmbd_login_user(name);
1435 	kfree(name);
1436 	return user;
1437 }
1438 
ntlm_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1439 static int ntlm_authenticate(struct ksmbd_work *work,
1440 			     struct smb2_sess_setup_req *req,
1441 			     struct smb2_sess_setup_rsp *rsp)
1442 {
1443 	struct ksmbd_conn *conn = work->conn;
1444 	struct ksmbd_session *sess = work->sess;
1445 	struct channel *chann = NULL;
1446 	struct ksmbd_user *user;
1447 	u64 prev_id;
1448 	int sz, rc;
1449 
1450 	ksmbd_debug(SMB, "authenticate phase\n");
1451 	if (conn->use_spnego) {
1452 		unsigned char *spnego_blob;
1453 		u16 spnego_blob_len;
1454 
1455 		rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1456 						    &spnego_blob_len,
1457 						    0);
1458 		if (rc)
1459 			return -ENOMEM;
1460 
1461 		memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1462 		rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1463 		kfree(spnego_blob);
1464 	}
1465 
1466 	user = session_user(conn, req);
1467 	if (!user) {
1468 		ksmbd_debug(SMB, "Unknown user name or an error\n");
1469 		return -EPERM;
1470 	}
1471 
1472 	/* Check for previous session */
1473 	prev_id = le64_to_cpu(req->PreviousSessionId);
1474 	if (prev_id && prev_id != sess->id)
1475 		destroy_previous_session(conn, user, prev_id);
1476 
1477 	if (sess->state == SMB2_SESSION_VALID) {
1478 		/*
1479 		 * Reuse session if anonymous try to connect
1480 		 * on reauthetication.
1481 		 */
1482 		if (conn->binding == false && ksmbd_anonymous_user(user)) {
1483 			ksmbd_free_user(user);
1484 			return 0;
1485 		}
1486 
1487 		if (!ksmbd_compare_user(sess->user, user)) {
1488 			ksmbd_free_user(user);
1489 			return -EPERM;
1490 		}
1491 		ksmbd_free_user(user);
1492 	} else {
1493 		sess->user = user;
1494 	}
1495 
1496 	if (conn->binding == false && user_guest(sess->user)) {
1497 		rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1498 	} else {
1499 		struct authenticate_message *authblob;
1500 
1501 		authblob = user_authblob(conn, req);
1502 		if (conn->use_spnego && conn->mechToken)
1503 			sz = conn->mechTokenLen;
1504 		else
1505 			sz = le16_to_cpu(req->SecurityBufferLength);
1506 		rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1507 		if (rc) {
1508 			set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1509 			ksmbd_debug(SMB, "authentication failed\n");
1510 			return -EPERM;
1511 		}
1512 	}
1513 
1514 	/*
1515 	 * If session state is SMB2_SESSION_VALID, We can assume
1516 	 * that it is reauthentication. And the user/password
1517 	 * has been verified, so return it here.
1518 	 */
1519 	if (sess->state == SMB2_SESSION_VALID) {
1520 		if (conn->binding)
1521 			goto binding_session;
1522 		return 0;
1523 	}
1524 
1525 	if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1526 	     (conn->sign || server_conf.enforced_signing)) ||
1527 	    (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1528 		sess->sign = true;
1529 
1530 	if (smb3_encryption_negotiated(conn) &&
1531 			!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1532 		rc = conn->ops->generate_encryptionkey(conn, sess);
1533 		if (rc) {
1534 			ksmbd_debug(SMB,
1535 					"SMB3 encryption key generation failed\n");
1536 			return -EINVAL;
1537 		}
1538 		sess->enc = true;
1539 		if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1540 			rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1541 		/*
1542 		 * signing is disable if encryption is enable
1543 		 * on this session
1544 		 */
1545 		sess->sign = false;
1546 	}
1547 
1548 binding_session:
1549 	if (conn->dialect >= SMB30_PROT_ID) {
1550 		chann = lookup_chann_list(sess, conn);
1551 		if (!chann) {
1552 			chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP);
1553 			if (!chann)
1554 				return -ENOMEM;
1555 
1556 			chann->conn = conn;
1557 			xa_store(&sess->ksmbd_chann_list, (long)conn, chann, KSMBD_DEFAULT_GFP);
1558 		}
1559 	}
1560 
1561 	if (conn->ops->generate_signingkey) {
1562 		rc = conn->ops->generate_signingkey(sess, conn);
1563 		if (rc) {
1564 			ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1565 			return -EINVAL;
1566 		}
1567 	}
1568 
1569 	if (!ksmbd_conn_lookup_dialect(conn)) {
1570 		pr_err("fail to verify the dialect\n");
1571 		return -ENOENT;
1572 	}
1573 	return 0;
1574 }
1575 
1576 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1577 static int krb5_authenticate(struct ksmbd_work *work,
1578 			     struct smb2_sess_setup_req *req,
1579 			     struct smb2_sess_setup_rsp *rsp)
1580 {
1581 	struct ksmbd_conn *conn = work->conn;
1582 	struct ksmbd_session *sess = work->sess;
1583 	char *in_blob, *out_blob;
1584 	struct channel *chann = NULL;
1585 	u64 prev_sess_id;
1586 	int in_len, out_len;
1587 	int retval;
1588 
1589 	in_blob = (char *)&req->hdr.ProtocolId +
1590 		le16_to_cpu(req->SecurityBufferOffset);
1591 	in_len = le16_to_cpu(req->SecurityBufferLength);
1592 	out_blob = (char *)&rsp->hdr.ProtocolId +
1593 		le16_to_cpu(rsp->SecurityBufferOffset);
1594 	out_len = work->response_sz -
1595 		(le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1596 
1597 	/* Check previous session */
1598 	prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1599 	if (prev_sess_id && prev_sess_id != sess->id)
1600 		destroy_previous_session(conn, sess->user, prev_sess_id);
1601 
1602 	if (sess->state == SMB2_SESSION_VALID)
1603 		ksmbd_free_user(sess->user);
1604 
1605 	retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1606 					 out_blob, &out_len);
1607 	if (retval) {
1608 		ksmbd_debug(SMB, "krb5 authentication failed\n");
1609 		return -EINVAL;
1610 	}
1611 	rsp->SecurityBufferLength = cpu_to_le16(out_len);
1612 
1613 	if ((conn->sign || server_conf.enforced_signing) ||
1614 	    (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1615 		sess->sign = true;
1616 
1617 	if (smb3_encryption_negotiated(conn)) {
1618 		retval = conn->ops->generate_encryptionkey(conn, sess);
1619 		if (retval) {
1620 			ksmbd_debug(SMB,
1621 				    "SMB3 encryption key generation failed\n");
1622 			return -EINVAL;
1623 		}
1624 		sess->enc = true;
1625 		if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1626 			rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1627 		sess->sign = false;
1628 	}
1629 
1630 	if (conn->dialect >= SMB30_PROT_ID) {
1631 		chann = lookup_chann_list(sess, conn);
1632 		if (!chann) {
1633 			chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP);
1634 			if (!chann)
1635 				return -ENOMEM;
1636 
1637 			chann->conn = conn;
1638 			xa_store(&sess->ksmbd_chann_list, (long)conn, chann, KSMBD_DEFAULT_GFP);
1639 		}
1640 	}
1641 
1642 	if (conn->ops->generate_signingkey) {
1643 		retval = conn->ops->generate_signingkey(sess, conn);
1644 		if (retval) {
1645 			ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1646 			return -EINVAL;
1647 		}
1648 	}
1649 
1650 	if (!ksmbd_conn_lookup_dialect(conn)) {
1651 		pr_err("fail to verify the dialect\n");
1652 		return -ENOENT;
1653 	}
1654 	return 0;
1655 }
1656 #else
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1657 static int krb5_authenticate(struct ksmbd_work *work,
1658 			     struct smb2_sess_setup_req *req,
1659 			     struct smb2_sess_setup_rsp *rsp)
1660 {
1661 	return -EOPNOTSUPP;
1662 }
1663 #endif
1664 
smb2_sess_setup(struct ksmbd_work * work)1665 int smb2_sess_setup(struct ksmbd_work *work)
1666 {
1667 	struct ksmbd_conn *conn = work->conn;
1668 	struct smb2_sess_setup_req *req;
1669 	struct smb2_sess_setup_rsp *rsp;
1670 	struct ksmbd_session *sess;
1671 	struct negotiate_message *negblob;
1672 	unsigned int negblob_len, negblob_off;
1673 	int rc = 0;
1674 
1675 	ksmbd_debug(SMB, "Received smb2 session setup request\n");
1676 
1677 	WORK_BUFFERS(work, req, rsp);
1678 
1679 	rsp->StructureSize = cpu_to_le16(9);
1680 	rsp->SessionFlags = 0;
1681 	rsp->SecurityBufferOffset = cpu_to_le16(72);
1682 	rsp->SecurityBufferLength = 0;
1683 
1684 	ksmbd_conn_lock(conn);
1685 	if (!req->hdr.SessionId) {
1686 		sess = ksmbd_smb2_session_create();
1687 		if (!sess) {
1688 			rc = -ENOMEM;
1689 			goto out_err;
1690 		}
1691 		rsp->hdr.SessionId = cpu_to_le64(sess->id);
1692 		rc = ksmbd_session_register(conn, sess);
1693 		if (rc)
1694 			goto out_err;
1695 
1696 		conn->binding = false;
1697 	} else if (conn->dialect >= SMB30_PROT_ID &&
1698 		   (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1699 		   req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1700 		u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1701 
1702 		sess = ksmbd_session_lookup_slowpath(sess_id);
1703 		if (!sess) {
1704 			rc = -ENOENT;
1705 			goto out_err;
1706 		}
1707 
1708 		if (conn->dialect != sess->dialect) {
1709 			rc = -EINVAL;
1710 			ksmbd_user_session_put(sess);
1711 			goto out_err;
1712 		}
1713 
1714 		if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1715 			rc = -EINVAL;
1716 			ksmbd_user_session_put(sess);
1717 			goto out_err;
1718 		}
1719 
1720 		if (strncmp(conn->ClientGUID, sess->ClientGUID,
1721 			    SMB2_CLIENT_GUID_SIZE)) {
1722 			rc = -ENOENT;
1723 			ksmbd_user_session_put(sess);
1724 			goto out_err;
1725 		}
1726 
1727 		if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1728 			rc = -EACCES;
1729 			ksmbd_user_session_put(sess);
1730 			goto out_err;
1731 		}
1732 
1733 		if (sess->state == SMB2_SESSION_EXPIRED) {
1734 			rc = -EFAULT;
1735 			ksmbd_user_session_put(sess);
1736 			goto out_err;
1737 		}
1738 		ksmbd_user_session_put(sess);
1739 
1740 		if (ksmbd_conn_need_reconnect(conn)) {
1741 			rc = -EFAULT;
1742 			sess = NULL;
1743 			goto out_err;
1744 		}
1745 
1746 		sess = ksmbd_session_lookup(conn, sess_id);
1747 		if (!sess) {
1748 			rc = -EACCES;
1749 			goto out_err;
1750 		}
1751 
1752 		if (user_guest(sess->user)) {
1753 			rc = -EOPNOTSUPP;
1754 			goto out_err;
1755 		}
1756 
1757 		conn->binding = true;
1758 	} else if ((conn->dialect < SMB30_PROT_ID ||
1759 		    server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1760 		   (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1761 		sess = NULL;
1762 		rc = -EACCES;
1763 		goto out_err;
1764 	} else {
1765 		sess = ksmbd_session_lookup(conn,
1766 					    le64_to_cpu(req->hdr.SessionId));
1767 		if (!sess) {
1768 			rc = -ENOENT;
1769 			goto out_err;
1770 		}
1771 
1772 		if (sess->state == SMB2_SESSION_EXPIRED) {
1773 			rc = -EFAULT;
1774 			goto out_err;
1775 		}
1776 
1777 		if (ksmbd_conn_need_reconnect(conn)) {
1778 			rc = -EFAULT;
1779 			sess = NULL;
1780 			goto out_err;
1781 		}
1782 
1783 		conn->binding = false;
1784 	}
1785 	work->sess = sess;
1786 
1787 	negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1788 	negblob_len = le16_to_cpu(req->SecurityBufferLength);
1789 	if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1790 		rc = -EINVAL;
1791 		goto out_err;
1792 	}
1793 
1794 	negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1795 			negblob_off);
1796 
1797 	if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1798 		if (conn->mechToken) {
1799 			negblob = (struct negotiate_message *)conn->mechToken;
1800 			negblob_len = conn->mechTokenLen;
1801 		}
1802 	}
1803 
1804 	if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1805 		rc = -EINVAL;
1806 		goto out_err;
1807 	}
1808 
1809 	if (server_conf.auth_mechs & conn->auth_mechs) {
1810 		rc = generate_preauth_hash(work);
1811 		if (rc)
1812 			goto out_err;
1813 
1814 		if (conn->preferred_auth_mech &
1815 				(KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1816 			rc = krb5_authenticate(work, req, rsp);
1817 			if (rc) {
1818 				rc = -EINVAL;
1819 				goto out_err;
1820 			}
1821 
1822 			if (!ksmbd_conn_need_reconnect(conn)) {
1823 				ksmbd_conn_set_good(conn);
1824 				sess->state = SMB2_SESSION_VALID;
1825 			}
1826 			kfree(sess->Preauth_HashValue);
1827 			sess->Preauth_HashValue = NULL;
1828 		} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1829 			if (negblob->MessageType == NtLmNegotiate) {
1830 				rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1831 				if (rc)
1832 					goto out_err;
1833 				rsp->hdr.Status =
1834 					STATUS_MORE_PROCESSING_REQUIRED;
1835 			} else if (negblob->MessageType == NtLmAuthenticate) {
1836 				rc = ntlm_authenticate(work, req, rsp);
1837 				if (rc)
1838 					goto out_err;
1839 
1840 				if (!ksmbd_conn_need_reconnect(conn)) {
1841 					ksmbd_conn_set_good(conn);
1842 					sess->state = SMB2_SESSION_VALID;
1843 				}
1844 				if (conn->binding) {
1845 					struct preauth_session *preauth_sess;
1846 
1847 					preauth_sess =
1848 						ksmbd_preauth_session_lookup(conn, sess->id);
1849 					if (preauth_sess) {
1850 						list_del(&preauth_sess->preauth_entry);
1851 						kfree(preauth_sess);
1852 					}
1853 				}
1854 				kfree(sess->Preauth_HashValue);
1855 				sess->Preauth_HashValue = NULL;
1856 			} else {
1857 				pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1858 						le32_to_cpu(negblob->MessageType));
1859 				rc = -EINVAL;
1860 			}
1861 		} else {
1862 			/* TODO: need one more negotiation */
1863 			pr_err("Not support the preferred authentication\n");
1864 			rc = -EINVAL;
1865 		}
1866 	} else {
1867 		pr_err("Not support authentication\n");
1868 		rc = -EINVAL;
1869 	}
1870 
1871 out_err:
1872 	if (rc == -EINVAL)
1873 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1874 	else if (rc == -ENOENT)
1875 		rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1876 	else if (rc == -EACCES)
1877 		rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1878 	else if (rc == -EFAULT)
1879 		rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1880 	else if (rc == -ENOMEM)
1881 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1882 	else if (rc == -EOPNOTSUPP)
1883 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1884 	else if (rc)
1885 		rsp->hdr.Status = STATUS_LOGON_FAILURE;
1886 
1887 	if (conn->use_spnego && conn->mechToken) {
1888 		kfree(conn->mechToken);
1889 		conn->mechToken = NULL;
1890 	}
1891 
1892 	if (rc < 0) {
1893 		/*
1894 		 * SecurityBufferOffset should be set to zero
1895 		 * in session setup error response.
1896 		 */
1897 		rsp->SecurityBufferOffset = 0;
1898 
1899 		if (sess) {
1900 			bool try_delay = false;
1901 
1902 			/*
1903 			 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1904 			 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1905 			 * failure to make it harder to send enough random connection requests
1906 			 * to break into a server.
1907 			 */
1908 			if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1909 				try_delay = true;
1910 
1911 			sess->last_active = jiffies;
1912 			sess->state = SMB2_SESSION_EXPIRED;
1913 			if (try_delay) {
1914 				ksmbd_conn_set_need_reconnect(conn);
1915 				ssleep(5);
1916 				ksmbd_conn_set_need_negotiate(conn);
1917 			}
1918 		}
1919 		smb2_set_err_rsp(work);
1920 	} else {
1921 		unsigned int iov_len;
1922 
1923 		if (rsp->SecurityBufferLength)
1924 			iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1925 				le16_to_cpu(rsp->SecurityBufferLength);
1926 		else
1927 			iov_len = sizeof(struct smb2_sess_setup_rsp);
1928 		rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1929 		if (rc)
1930 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1931 	}
1932 
1933 	ksmbd_conn_unlock(conn);
1934 	return rc;
1935 }
1936 
1937 /**
1938  * smb2_tree_connect() - handler for smb2 tree connect command
1939  * @work:	smb work containing smb request buffer
1940  *
1941  * Return:      0 on success, otherwise error
1942  */
smb2_tree_connect(struct ksmbd_work * work)1943 int smb2_tree_connect(struct ksmbd_work *work)
1944 {
1945 	struct ksmbd_conn *conn = work->conn;
1946 	struct smb2_tree_connect_req *req;
1947 	struct smb2_tree_connect_rsp *rsp;
1948 	struct ksmbd_session *sess = work->sess;
1949 	char *treename = NULL, *name = NULL;
1950 	struct ksmbd_tree_conn_status status;
1951 	struct ksmbd_share_config *share = NULL;
1952 	int rc = -EINVAL;
1953 
1954 	ksmbd_debug(SMB, "Received smb2 tree connect request\n");
1955 
1956 	WORK_BUFFERS(work, req, rsp);
1957 
1958 	treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1959 					  le16_to_cpu(req->PathLength), true,
1960 					  conn->local_nls);
1961 	if (IS_ERR(treename)) {
1962 		pr_err("treename is NULL\n");
1963 		status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1964 		goto out_err1;
1965 	}
1966 
1967 	name = ksmbd_extract_sharename(conn->um, treename);
1968 	if (IS_ERR(name)) {
1969 		status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1970 		goto out_err1;
1971 	}
1972 
1973 	ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1974 		    name, treename);
1975 
1976 	status = ksmbd_tree_conn_connect(work, name);
1977 	if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1978 		rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1979 	else
1980 		goto out_err1;
1981 
1982 	share = status.tree_conn->share_conf;
1983 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1984 		ksmbd_debug(SMB, "IPC share path request\n");
1985 		rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1986 		rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1987 			FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1988 			FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1989 			FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1990 			FILE_SYNCHRONIZE_LE;
1991 	} else {
1992 		rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1993 		rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1994 			FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1995 		if (test_tree_conn_flag(status.tree_conn,
1996 					KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1997 			rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1998 				FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1999 				FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
2000 				FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
2001 				FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
2002 				FILE_SYNCHRONIZE_LE;
2003 		}
2004 	}
2005 
2006 	status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
2007 	if (conn->posix_ext_supported)
2008 		status.tree_conn->posix_extensions = true;
2009 
2010 	write_lock(&sess->tree_conns_lock);
2011 	status.tree_conn->t_state = TREE_CONNECTED;
2012 	write_unlock(&sess->tree_conns_lock);
2013 	rsp->StructureSize = cpu_to_le16(16);
2014 out_err1:
2015 	if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
2016 	    test_share_config_flag(share,
2017 				   KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2018 		rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2019 	else
2020 		rsp->Capabilities = 0;
2021 	rsp->Reserved = 0;
2022 	/* default manual caching */
2023 	rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2024 
2025 	rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2026 	if (rc)
2027 		status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2028 
2029 	if (!IS_ERR(treename))
2030 		kfree(treename);
2031 	if (!IS_ERR(name))
2032 		kfree(name);
2033 
2034 	switch (status.ret) {
2035 	case KSMBD_TREE_CONN_STATUS_OK:
2036 		rsp->hdr.Status = STATUS_SUCCESS;
2037 		rc = 0;
2038 		break;
2039 	case -ESTALE:
2040 	case -ENOENT:
2041 	case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2042 		rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2043 		break;
2044 	case -ENOMEM:
2045 	case KSMBD_TREE_CONN_STATUS_NOMEM:
2046 		rsp->hdr.Status = STATUS_NO_MEMORY;
2047 		break;
2048 	case KSMBD_TREE_CONN_STATUS_ERROR:
2049 	case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2050 	case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2051 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
2052 		break;
2053 	case -EINVAL:
2054 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2055 		break;
2056 	default:
2057 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
2058 	}
2059 
2060 	if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2061 		smb2_set_err_rsp(work);
2062 
2063 	return rc;
2064 }
2065 
2066 /**
2067  * smb2_create_open_flags() - convert smb open flags to unix open flags
2068  * @file_present:	is file already present
2069  * @access:		file access flags
2070  * @disposition:	file disposition flags
2071  * @may_flags:		set with MAY_ flags
2072  * @coptions:		file creation options
2073  * @mode:		file mode
2074  *
2075  * Return:      file open flags
2076  */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags,__le32 coptions,umode_t mode)2077 static int smb2_create_open_flags(bool file_present, __le32 access,
2078 				  __le32 disposition,
2079 				  int *may_flags,
2080 				  __le32 coptions,
2081 				  umode_t mode)
2082 {
2083 	int oflags = O_NONBLOCK | O_LARGEFILE;
2084 
2085 	if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) {
2086 		access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
2087 		ksmbd_debug(SMB, "Discard write access to a directory\n");
2088 	}
2089 
2090 	if (access & FILE_READ_DESIRED_ACCESS_LE &&
2091 	    access & FILE_WRITE_DESIRE_ACCESS_LE) {
2092 		oflags |= O_RDWR;
2093 		*may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2094 	} else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2095 		oflags |= O_WRONLY;
2096 		*may_flags = MAY_OPEN | MAY_WRITE;
2097 	} else {
2098 		oflags |= O_RDONLY;
2099 		*may_flags = MAY_OPEN | MAY_READ;
2100 	}
2101 
2102 	if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode))
2103 		oflags |= O_PATH;
2104 
2105 	if (file_present) {
2106 		switch (disposition & FILE_CREATE_MASK_LE) {
2107 		case FILE_OPEN_LE:
2108 		case FILE_CREATE_LE:
2109 			break;
2110 		case FILE_SUPERSEDE_LE:
2111 		case FILE_OVERWRITE_LE:
2112 		case FILE_OVERWRITE_IF_LE:
2113 			oflags |= O_TRUNC;
2114 			break;
2115 		default:
2116 			break;
2117 		}
2118 	} else {
2119 		switch (disposition & FILE_CREATE_MASK_LE) {
2120 		case FILE_SUPERSEDE_LE:
2121 		case FILE_CREATE_LE:
2122 		case FILE_OPEN_IF_LE:
2123 		case FILE_OVERWRITE_IF_LE:
2124 			oflags |= O_CREAT;
2125 			break;
2126 		case FILE_OPEN_LE:
2127 		case FILE_OVERWRITE_LE:
2128 			oflags &= ~O_CREAT;
2129 			break;
2130 		default:
2131 			break;
2132 		}
2133 	}
2134 
2135 	return oflags;
2136 }
2137 
2138 /**
2139  * smb2_tree_disconnect() - handler for smb tree connect request
2140  * @work:	smb work containing request buffer
2141  *
2142  * Return:      0
2143  */
smb2_tree_disconnect(struct ksmbd_work * work)2144 int smb2_tree_disconnect(struct ksmbd_work *work)
2145 {
2146 	struct smb2_tree_disconnect_rsp *rsp;
2147 	struct smb2_tree_disconnect_req *req;
2148 	struct ksmbd_session *sess = work->sess;
2149 	struct ksmbd_tree_connect *tcon = work->tcon;
2150 	int err;
2151 
2152 	ksmbd_debug(SMB, "Received smb2 tree disconnect request\n");
2153 
2154 	WORK_BUFFERS(work, req, rsp);
2155 
2156 	if (!tcon) {
2157 		ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2158 
2159 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2160 		err = -ENOENT;
2161 		goto err_out;
2162 	}
2163 
2164 	ksmbd_close_tree_conn_fds(work);
2165 
2166 	write_lock(&sess->tree_conns_lock);
2167 	if (tcon->t_state == TREE_DISCONNECTED) {
2168 		write_unlock(&sess->tree_conns_lock);
2169 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2170 		err = -ENOENT;
2171 		goto err_out;
2172 	}
2173 
2174 	WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2175 	tcon->t_state = TREE_DISCONNECTED;
2176 	write_unlock(&sess->tree_conns_lock);
2177 
2178 	err = ksmbd_tree_conn_disconnect(sess, tcon);
2179 	if (err) {
2180 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2181 		goto err_out;
2182 	}
2183 
2184 	work->tcon = NULL;
2185 
2186 	rsp->StructureSize = cpu_to_le16(4);
2187 	err = ksmbd_iov_pin_rsp(work, rsp,
2188 				sizeof(struct smb2_tree_disconnect_rsp));
2189 	if (err) {
2190 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2191 		goto err_out;
2192 	}
2193 
2194 	return 0;
2195 
2196 err_out:
2197 	smb2_set_err_rsp(work);
2198 	return err;
2199 
2200 }
2201 
2202 /**
2203  * smb2_session_logoff() - handler for session log off request
2204  * @work:	smb work containing request buffer
2205  *
2206  * Return:      0
2207  */
smb2_session_logoff(struct ksmbd_work * work)2208 int smb2_session_logoff(struct ksmbd_work *work)
2209 {
2210 	struct ksmbd_conn *conn = work->conn;
2211 	struct ksmbd_session *sess = work->sess;
2212 	struct smb2_logoff_req *req;
2213 	struct smb2_logoff_rsp *rsp;
2214 	u64 sess_id;
2215 	int err;
2216 
2217 	WORK_BUFFERS(work, req, rsp);
2218 
2219 	ksmbd_debug(SMB, "Received smb2 session logoff request\n");
2220 
2221 	ksmbd_conn_lock(conn);
2222 	if (!ksmbd_conn_good(conn)) {
2223 		ksmbd_conn_unlock(conn);
2224 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2225 		smb2_set_err_rsp(work);
2226 		return -ENOENT;
2227 	}
2228 	sess_id = le64_to_cpu(req->hdr.SessionId);
2229 	ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2230 	ksmbd_conn_unlock(conn);
2231 
2232 	ksmbd_close_session_fds(work);
2233 	ksmbd_conn_wait_idle(conn);
2234 
2235 	if (ksmbd_tree_conn_session_logoff(sess)) {
2236 		ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2237 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2238 		smb2_set_err_rsp(work);
2239 		return -ENOENT;
2240 	}
2241 
2242 	ksmbd_destroy_file_table(&sess->file_table);
2243 	down_write(&conn->session_lock);
2244 	sess->state = SMB2_SESSION_EXPIRED;
2245 	up_write(&conn->session_lock);
2246 
2247 	ksmbd_free_user(sess->user);
2248 	sess->user = NULL;
2249 	ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2250 
2251 	rsp->StructureSize = cpu_to_le16(4);
2252 	err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2253 	if (err) {
2254 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2255 		smb2_set_err_rsp(work);
2256 		return err;
2257 	}
2258 	return 0;
2259 }
2260 
2261 /**
2262  * create_smb2_pipe() - create IPC pipe
2263  * @work:	smb work containing request buffer
2264  *
2265  * Return:      0 on success, otherwise error
2266  */
create_smb2_pipe(struct ksmbd_work * work)2267 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2268 {
2269 	struct smb2_create_rsp *rsp;
2270 	struct smb2_create_req *req;
2271 	int id;
2272 	int err;
2273 	char *name;
2274 
2275 	WORK_BUFFERS(work, req, rsp);
2276 
2277 	name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2278 				      1, work->conn->local_nls);
2279 	if (IS_ERR(name)) {
2280 		rsp->hdr.Status = STATUS_NO_MEMORY;
2281 		err = PTR_ERR(name);
2282 		goto out;
2283 	}
2284 
2285 	id = ksmbd_session_rpc_open(work->sess, name);
2286 	if (id < 0) {
2287 		pr_err("Unable to open RPC pipe: %d\n", id);
2288 		err = id;
2289 		goto out;
2290 	}
2291 
2292 	rsp->hdr.Status = STATUS_SUCCESS;
2293 	rsp->StructureSize = cpu_to_le16(89);
2294 	rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2295 	rsp->Flags = 0;
2296 	rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2297 
2298 	rsp->CreationTime = cpu_to_le64(0);
2299 	rsp->LastAccessTime = cpu_to_le64(0);
2300 	rsp->ChangeTime = cpu_to_le64(0);
2301 	rsp->AllocationSize = cpu_to_le64(0);
2302 	rsp->EndofFile = cpu_to_le64(0);
2303 	rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2304 	rsp->Reserved2 = 0;
2305 	rsp->VolatileFileId = id;
2306 	rsp->PersistentFileId = 0;
2307 	rsp->CreateContextsOffset = 0;
2308 	rsp->CreateContextsLength = 0;
2309 
2310 	err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2311 	if (err)
2312 		goto out;
2313 
2314 	kfree(name);
2315 	return 0;
2316 
2317 out:
2318 	switch (err) {
2319 	case -EINVAL:
2320 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2321 		break;
2322 	case -ENOSPC:
2323 	case -ENOMEM:
2324 		rsp->hdr.Status = STATUS_NO_MEMORY;
2325 		break;
2326 	}
2327 
2328 	if (!IS_ERR(name))
2329 		kfree(name);
2330 
2331 	smb2_set_err_rsp(work);
2332 	return err;
2333 }
2334 
2335 /**
2336  * smb2_set_ea() - handler for setting extended attributes using set
2337  *		info command
2338  * @eabuf:	set info command buffer
2339  * @buf_len:	set info command buffer length
2340  * @path:	dentry path for get ea
2341  * @get_write:	get write access to a mount
2342  *
2343  * Return:	0 on success, otherwise error
2344  */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2345 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2346 		       const struct path *path, bool get_write)
2347 {
2348 	struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2349 	char *attr_name = NULL, *value;
2350 	int rc = 0;
2351 	unsigned int next = 0;
2352 
2353 	if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2354 			le16_to_cpu(eabuf->EaValueLength))
2355 		return -EINVAL;
2356 
2357 	attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP);
2358 	if (!attr_name)
2359 		return -ENOMEM;
2360 
2361 	do {
2362 		if (!eabuf->EaNameLength)
2363 			goto next;
2364 
2365 		ksmbd_debug(SMB,
2366 			    "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2367 			    eabuf->name, eabuf->EaNameLength,
2368 			    le16_to_cpu(eabuf->EaValueLength),
2369 			    le32_to_cpu(eabuf->NextEntryOffset));
2370 
2371 		if (eabuf->EaNameLength >
2372 		    (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2373 			rc = -EINVAL;
2374 			break;
2375 		}
2376 
2377 		memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2378 		memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2379 		       eabuf->EaNameLength);
2380 		attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2381 		value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2382 
2383 		if (!eabuf->EaValueLength) {
2384 			rc = ksmbd_vfs_casexattr_len(idmap,
2385 						     path->dentry,
2386 						     attr_name,
2387 						     XATTR_USER_PREFIX_LEN +
2388 						     eabuf->EaNameLength);
2389 
2390 			/* delete the EA only when it exits */
2391 			if (rc > 0) {
2392 				rc = ksmbd_vfs_remove_xattr(idmap,
2393 							    path,
2394 							    attr_name,
2395 							    get_write);
2396 
2397 				if (rc < 0) {
2398 					ksmbd_debug(SMB,
2399 						    "remove xattr failed(%d)\n",
2400 						    rc);
2401 					break;
2402 				}
2403 			}
2404 
2405 			/* if the EA doesn't exist, just do nothing. */
2406 			rc = 0;
2407 		} else {
2408 			rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2409 						le16_to_cpu(eabuf->EaValueLength),
2410 						0, get_write);
2411 			if (rc < 0) {
2412 				ksmbd_debug(SMB,
2413 					    "ksmbd_vfs_setxattr is failed(%d)\n",
2414 					    rc);
2415 				break;
2416 			}
2417 		}
2418 
2419 next:
2420 		next = le32_to_cpu(eabuf->NextEntryOffset);
2421 		if (next == 0 || buf_len < next)
2422 			break;
2423 		buf_len -= next;
2424 		eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2425 		if (buf_len < sizeof(struct smb2_ea_info)) {
2426 			rc = -EINVAL;
2427 			break;
2428 		}
2429 
2430 		if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2431 				le16_to_cpu(eabuf->EaValueLength)) {
2432 			rc = -EINVAL;
2433 			break;
2434 		}
2435 	} while (next != 0);
2436 
2437 	kfree(attr_name);
2438 	return rc;
2439 }
2440 
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2441 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2442 					       struct ksmbd_file *fp,
2443 					       char *stream_name, int s_type)
2444 {
2445 	struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2446 	size_t xattr_stream_size;
2447 	char *xattr_stream_name;
2448 	int rc;
2449 
2450 	rc = ksmbd_vfs_xattr_stream_name(stream_name,
2451 					 &xattr_stream_name,
2452 					 &xattr_stream_size,
2453 					 s_type);
2454 	if (rc)
2455 		return rc;
2456 
2457 	fp->stream.name = xattr_stream_name;
2458 	fp->stream.size = xattr_stream_size;
2459 
2460 	/* Check if there is stream prefix in xattr space */
2461 	rc = ksmbd_vfs_casexattr_len(idmap,
2462 				     path->dentry,
2463 				     xattr_stream_name,
2464 				     xattr_stream_size);
2465 	if (rc >= 0)
2466 		return 0;
2467 
2468 	if (fp->cdoption == FILE_OPEN_LE) {
2469 		ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2470 		return -EBADF;
2471 	}
2472 
2473 	rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2474 	if (rc < 0)
2475 		pr_err("Failed to store XATTR stream name :%d\n", rc);
2476 	return 0;
2477 }
2478 
smb2_remove_smb_xattrs(const struct path * path)2479 static int smb2_remove_smb_xattrs(const struct path *path)
2480 {
2481 	struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2482 	char *name, *xattr_list = NULL;
2483 	ssize_t xattr_list_len;
2484 	int err = 0;
2485 
2486 	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2487 	if (xattr_list_len < 0) {
2488 		goto out;
2489 	} else if (!xattr_list_len) {
2490 		ksmbd_debug(SMB, "empty xattr in the file\n");
2491 		goto out;
2492 	}
2493 
2494 	for (name = xattr_list; name - xattr_list < xattr_list_len;
2495 			name += strlen(name) + 1) {
2496 		ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2497 
2498 		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2499 		    !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2500 			     STREAM_PREFIX_LEN)) {
2501 			err = ksmbd_vfs_remove_xattr(idmap, path,
2502 						     name, true);
2503 			if (err)
2504 				ksmbd_debug(SMB, "remove xattr failed : %s\n",
2505 					    name);
2506 		}
2507 	}
2508 out:
2509 	kvfree(xattr_list);
2510 	return err;
2511 }
2512 
smb2_create_truncate(const struct path * path)2513 static int smb2_create_truncate(const struct path *path)
2514 {
2515 	int rc = vfs_truncate(path, 0);
2516 
2517 	if (rc) {
2518 		pr_err("vfs_truncate failed, rc %d\n", rc);
2519 		return rc;
2520 	}
2521 
2522 	rc = smb2_remove_smb_xattrs(path);
2523 	if (rc == -EOPNOTSUPP)
2524 		rc = 0;
2525 	if (rc)
2526 		ksmbd_debug(SMB,
2527 			    "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2528 			    rc);
2529 	return rc;
2530 }
2531 
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2532 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2533 			    struct ksmbd_file *fp)
2534 {
2535 	struct xattr_dos_attrib da = {0};
2536 	int rc;
2537 
2538 	if (!test_share_config_flag(tcon->share_conf,
2539 				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2540 		return;
2541 
2542 	da.version = 4;
2543 	da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2544 	da.itime = da.create_time = fp->create_time;
2545 	da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2546 		XATTR_DOSINFO_ITIME;
2547 
2548 	rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2549 	if (rc)
2550 		ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2551 }
2552 
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2553 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2554 			       const struct path *path, struct ksmbd_file *fp)
2555 {
2556 	struct xattr_dos_attrib da;
2557 	int rc;
2558 
2559 	fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2560 
2561 	/* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2562 	if (!test_share_config_flag(tcon->share_conf,
2563 				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2564 		return;
2565 
2566 	rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2567 					    path->dentry, &da);
2568 	if (rc > 0) {
2569 		fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2570 		fp->create_time = da.create_time;
2571 		fp->itime = da.itime;
2572 	}
2573 }
2574 
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)2575 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2576 		      struct path *path, char *name, int open_flags,
2577 		      umode_t posix_mode, bool is_dir)
2578 {
2579 	struct ksmbd_tree_connect *tcon = work->tcon;
2580 	struct ksmbd_share_config *share = tcon->share_conf;
2581 	umode_t mode;
2582 	int rc;
2583 
2584 	if (!(open_flags & O_CREAT))
2585 		return -EBADF;
2586 
2587 	ksmbd_debug(SMB, "file does not exist, so creating\n");
2588 	if (is_dir == true) {
2589 		ksmbd_debug(SMB, "creating directory\n");
2590 
2591 		mode = share_config_directory_mode(share, posix_mode);
2592 		rc = ksmbd_vfs_mkdir(work, name, mode);
2593 		if (rc)
2594 			return rc;
2595 	} else {
2596 		ksmbd_debug(SMB, "creating regular file\n");
2597 
2598 		mode = share_config_create_mode(share, posix_mode);
2599 		rc = ksmbd_vfs_create(work, name, mode);
2600 		if (rc)
2601 			return rc;
2602 	}
2603 
2604 	rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2605 	if (rc) {
2606 		pr_err("cannot get linux path (%s), err = %d\n",
2607 		       name, rc);
2608 		return rc;
2609 	}
2610 	return 0;
2611 }
2612 
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2613 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2614 				 struct smb2_create_req *req,
2615 				 const struct path *path)
2616 {
2617 	struct create_context *context;
2618 	struct create_sd_buf_req *sd_buf;
2619 
2620 	if (!req->CreateContextsOffset)
2621 		return -ENOENT;
2622 
2623 	/* Parse SD BUFFER create contexts */
2624 	context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2625 	if (!context)
2626 		return -ENOENT;
2627 	else if (IS_ERR(context))
2628 		return PTR_ERR(context);
2629 
2630 	ksmbd_debug(SMB,
2631 		    "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2632 	sd_buf = (struct create_sd_buf_req *)context;
2633 	if (le16_to_cpu(context->DataOffset) +
2634 	    le32_to_cpu(context->DataLength) <
2635 	    sizeof(struct create_sd_buf_req))
2636 		return -EINVAL;
2637 	return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2638 			    le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2639 }
2640 
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2641 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2642 			     struct mnt_idmap *idmap,
2643 			     struct inode *inode)
2644 {
2645 	vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2646 	vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2647 
2648 	fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2649 	fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2650 	fattr->cf_mode = inode->i_mode;
2651 	fattr->cf_acls = NULL;
2652 	fattr->cf_dacls = NULL;
2653 
2654 	if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2655 		fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2656 		if (S_ISDIR(inode->i_mode))
2657 			fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2658 	}
2659 }
2660 
2661 enum {
2662 	DURABLE_RECONN_V2 = 1,
2663 	DURABLE_RECONN,
2664 	DURABLE_REQ_V2,
2665 	DURABLE_REQ,
2666 };
2667 
2668 struct durable_info {
2669 	struct ksmbd_file *fp;
2670 	unsigned short int type;
2671 	bool persistent;
2672 	bool reconnected;
2673 	unsigned int timeout;
2674 	char *CreateGuid;
2675 };
2676 
parse_durable_handle_context(struct ksmbd_work * work,struct smb2_create_req * req,struct lease_ctx_info * lc,struct durable_info * dh_info)2677 static int parse_durable_handle_context(struct ksmbd_work *work,
2678 					struct smb2_create_req *req,
2679 					struct lease_ctx_info *lc,
2680 					struct durable_info *dh_info)
2681 {
2682 	struct ksmbd_conn *conn = work->conn;
2683 	struct create_context *context;
2684 	int dh_idx, err = 0;
2685 	u64 persistent_id = 0;
2686 	int req_op_level;
2687 	static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2688 
2689 	req_op_level = req->RequestedOplockLevel;
2690 	for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2691 	     dh_idx++) {
2692 		context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2693 		if (IS_ERR(context)) {
2694 			err = PTR_ERR(context);
2695 			goto out;
2696 		}
2697 		if (!context)
2698 			continue;
2699 
2700 		switch (dh_idx) {
2701 		case DURABLE_RECONN_V2:
2702 		{
2703 			struct create_durable_reconn_v2_req *recon_v2;
2704 
2705 			if (dh_info->type == DURABLE_RECONN ||
2706 			    dh_info->type == DURABLE_REQ_V2) {
2707 				err = -EINVAL;
2708 				goto out;
2709 			}
2710 
2711 			recon_v2 = (struct create_durable_reconn_v2_req *)context;
2712 			persistent_id = recon_v2->Fid.PersistentFileId;
2713 			dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2714 			if (!dh_info->fp) {
2715 				ksmbd_debug(SMB, "Failed to get durable handle state\n");
2716 				err = -EBADF;
2717 				goto out;
2718 			}
2719 
2720 			if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2721 				   SMB2_CREATE_GUID_SIZE)) {
2722 				err = -EBADF;
2723 				ksmbd_put_durable_fd(dh_info->fp);
2724 				goto out;
2725 			}
2726 
2727 			dh_info->type = dh_idx;
2728 			dh_info->reconnected = true;
2729 			ksmbd_debug(SMB,
2730 				"reconnect v2 Persistent-id from reconnect = %llu\n",
2731 					persistent_id);
2732 			break;
2733 		}
2734 		case DURABLE_RECONN:
2735 		{
2736 			struct create_durable_reconn_req *recon;
2737 
2738 			if (dh_info->type == DURABLE_RECONN_V2 ||
2739 			    dh_info->type == DURABLE_REQ_V2) {
2740 				err = -EINVAL;
2741 				goto out;
2742 			}
2743 
2744 			recon = (struct create_durable_reconn_req *)context;
2745 			persistent_id = recon->Data.Fid.PersistentFileId;
2746 			dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2747 			if (!dh_info->fp) {
2748 				ksmbd_debug(SMB, "Failed to get durable handle state\n");
2749 				err = -EBADF;
2750 				goto out;
2751 			}
2752 
2753 			dh_info->type = dh_idx;
2754 			dh_info->reconnected = true;
2755 			ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2756 				    persistent_id);
2757 			break;
2758 		}
2759 		case DURABLE_REQ_V2:
2760 		{
2761 			struct create_durable_req_v2 *durable_v2_blob;
2762 
2763 			if (dh_info->type == DURABLE_RECONN ||
2764 			    dh_info->type == DURABLE_RECONN_V2) {
2765 				err = -EINVAL;
2766 				goto out;
2767 			}
2768 
2769 			durable_v2_blob =
2770 				(struct create_durable_req_v2 *)context;
2771 			ksmbd_debug(SMB, "Request for durable v2 open\n");
2772 			dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2773 			if (dh_info->fp) {
2774 				if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2775 					    SMB2_CLIENT_GUID_SIZE)) {
2776 					if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2777 						err = -ENOEXEC;
2778 						goto out;
2779 					}
2780 
2781 					dh_info->fp->conn = conn;
2782 					dh_info->reconnected = true;
2783 					goto out;
2784 				}
2785 			}
2786 
2787 			if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2788 			    req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2789 				dh_info->CreateGuid =
2790 					durable_v2_blob->CreateGuid;
2791 				dh_info->persistent =
2792 					le32_to_cpu(durable_v2_blob->Flags);
2793 				dh_info->timeout =
2794 					le32_to_cpu(durable_v2_blob->Timeout);
2795 				dh_info->type = dh_idx;
2796 			}
2797 			break;
2798 		}
2799 		case DURABLE_REQ:
2800 			if (dh_info->type == DURABLE_RECONN)
2801 				goto out;
2802 			if (dh_info->type == DURABLE_RECONN_V2 ||
2803 			    dh_info->type == DURABLE_REQ_V2) {
2804 				err = -EINVAL;
2805 				goto out;
2806 			}
2807 
2808 			if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2809 			    req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2810 				ksmbd_debug(SMB, "Request for durable open\n");
2811 				dh_info->type = dh_idx;
2812 			}
2813 		}
2814 	}
2815 
2816 out:
2817 	return err;
2818 }
2819 
2820 /**
2821  * smb2_open() - handler for smb file open request
2822  * @work:	smb work containing request buffer
2823  *
2824  * Return:      0 on success, otherwise error
2825  */
smb2_open(struct ksmbd_work * work)2826 int smb2_open(struct ksmbd_work *work)
2827 {
2828 	struct ksmbd_conn *conn = work->conn;
2829 	struct ksmbd_session *sess = work->sess;
2830 	struct ksmbd_tree_connect *tcon = work->tcon;
2831 	struct smb2_create_req *req;
2832 	struct smb2_create_rsp *rsp;
2833 	struct path path, parent_path;
2834 	struct ksmbd_share_config *share = tcon->share_conf;
2835 	struct ksmbd_file *fp = NULL;
2836 	struct file *filp = NULL;
2837 	struct mnt_idmap *idmap = NULL;
2838 	struct kstat stat;
2839 	struct create_context *context;
2840 	struct lease_ctx_info *lc = NULL;
2841 	struct create_ea_buf_req *ea_buf = NULL;
2842 	struct oplock_info *opinfo;
2843 	struct durable_info dh_info = {0};
2844 	__le32 *next_ptr = NULL;
2845 	int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2846 	int rc = 0;
2847 	int contxt_cnt = 0, query_disk_id = 0;
2848 	int maximal_access_ctxt = 0, posix_ctxt = 0;
2849 	int s_type = 0;
2850 	int next_off = 0;
2851 	char *name = NULL;
2852 	char *stream_name = NULL;
2853 	bool file_present = false, created = false, already_permitted = false;
2854 	int share_ret, need_truncate = 0;
2855 	u64 time;
2856 	umode_t posix_mode = 0;
2857 	__le32 daccess, maximal_access = 0;
2858 	int iov_len = 0;
2859 
2860 	ksmbd_debug(SMB, "Received smb2 create request\n");
2861 
2862 	WORK_BUFFERS(work, req, rsp);
2863 
2864 	if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2865 	    (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2866 		ksmbd_debug(SMB, "invalid flag in chained command\n");
2867 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2868 		smb2_set_err_rsp(work);
2869 		return -EINVAL;
2870 	}
2871 
2872 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2873 		ksmbd_debug(SMB, "IPC pipe create request\n");
2874 		return create_smb2_pipe(work);
2875 	}
2876 
2877 	if (req->NameLength) {
2878 		name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2879 				     le16_to_cpu(req->NameLength),
2880 				     work->conn->local_nls);
2881 		if (IS_ERR(name)) {
2882 			rc = PTR_ERR(name);
2883 			name = NULL;
2884 			goto err_out2;
2885 		}
2886 
2887 		ksmbd_debug(SMB, "converted name = %s\n", name);
2888 		if (strchr(name, ':')) {
2889 			if (!test_share_config_flag(work->tcon->share_conf,
2890 						    KSMBD_SHARE_FLAG_STREAMS)) {
2891 				rc = -EBADF;
2892 				goto err_out2;
2893 			}
2894 			rc = parse_stream_name(name, &stream_name, &s_type);
2895 			if (rc < 0)
2896 				goto err_out2;
2897 		}
2898 
2899 		rc = ksmbd_validate_filename(name);
2900 		if (rc < 0)
2901 			goto err_out2;
2902 
2903 		if (ksmbd_share_veto_filename(share, name)) {
2904 			rc = -ENOENT;
2905 			ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2906 				    name);
2907 			goto err_out2;
2908 		}
2909 	} else {
2910 		name = kstrdup("", KSMBD_DEFAULT_GFP);
2911 		if (!name) {
2912 			rc = -ENOMEM;
2913 			goto err_out2;
2914 		}
2915 	}
2916 
2917 	req_op_level = req->RequestedOplockLevel;
2918 
2919 	if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2920 	    req->CreateContextsOffset) {
2921 		lc = parse_lease_state(req);
2922 		rc = parse_durable_handle_context(work, req, lc, &dh_info);
2923 		if (rc) {
2924 			ksmbd_debug(SMB, "error parsing durable handle context\n");
2925 			goto err_out2;
2926 		}
2927 
2928 		if (dh_info.reconnected == true) {
2929 			rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2930 			if (rc) {
2931 				ksmbd_put_durable_fd(dh_info.fp);
2932 				goto err_out2;
2933 			}
2934 
2935 			rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2936 			if (rc) {
2937 				ksmbd_put_durable_fd(dh_info.fp);
2938 				goto err_out2;
2939 			}
2940 
2941 			if (ksmbd_override_fsids(work)) {
2942 				rc = -ENOMEM;
2943 				ksmbd_put_durable_fd(dh_info.fp);
2944 				goto err_out2;
2945 			}
2946 
2947 			fp = dh_info.fp;
2948 			file_info = FILE_OPENED;
2949 
2950 			rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2951 			if (rc)
2952 				goto err_out2;
2953 
2954 			ksmbd_put_durable_fd(fp);
2955 			goto reconnected_fp;
2956 		}
2957 	} else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2958 		lc = parse_lease_state(req);
2959 
2960 	if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2961 		pr_err("Invalid impersonationlevel : 0x%x\n",
2962 		       le32_to_cpu(req->ImpersonationLevel));
2963 		rc = -EIO;
2964 		rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2965 		goto err_out2;
2966 	}
2967 
2968 	if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2969 		pr_err("Invalid create options : 0x%x\n",
2970 		       le32_to_cpu(req->CreateOptions));
2971 		rc = -EINVAL;
2972 		goto err_out2;
2973 	} else {
2974 		if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2975 		    req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2976 			req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2977 
2978 		if (req->CreateOptions &
2979 		    (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2980 		     FILE_RESERVE_OPFILTER_LE)) {
2981 			rc = -EOPNOTSUPP;
2982 			goto err_out2;
2983 		}
2984 
2985 		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2986 			if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2987 				rc = -EINVAL;
2988 				goto err_out2;
2989 			} else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2990 				req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2991 			}
2992 		}
2993 	}
2994 
2995 	if (le32_to_cpu(req->CreateDisposition) >
2996 	    le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2997 		pr_err("Invalid create disposition : 0x%x\n",
2998 		       le32_to_cpu(req->CreateDisposition));
2999 		rc = -EINVAL;
3000 		goto err_out2;
3001 	}
3002 
3003 	if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
3004 		pr_err("Invalid desired access : 0x%x\n",
3005 		       le32_to_cpu(req->DesiredAccess));
3006 		rc = -EACCES;
3007 		goto err_out2;
3008 	}
3009 
3010 	if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
3011 		pr_err("Invalid file attribute : 0x%x\n",
3012 		       le32_to_cpu(req->FileAttributes));
3013 		rc = -EINVAL;
3014 		goto err_out2;
3015 	}
3016 
3017 	if (req->CreateContextsOffset) {
3018 		/* Parse non-durable handle create contexts */
3019 		context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
3020 		if (IS_ERR(context)) {
3021 			rc = PTR_ERR(context);
3022 			goto err_out2;
3023 		} else if (context) {
3024 			ea_buf = (struct create_ea_buf_req *)context;
3025 			if (le16_to_cpu(context->DataOffset) +
3026 			    le32_to_cpu(context->DataLength) <
3027 			    sizeof(struct create_ea_buf_req)) {
3028 				rc = -EINVAL;
3029 				goto err_out2;
3030 			}
3031 			if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3032 				rsp->hdr.Status = STATUS_ACCESS_DENIED;
3033 				rc = -EACCES;
3034 				goto err_out2;
3035 			}
3036 		}
3037 
3038 		context = smb2_find_context_vals(req,
3039 						 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3040 		if (IS_ERR(context)) {
3041 			rc = PTR_ERR(context);
3042 			goto err_out2;
3043 		} else if (context) {
3044 			ksmbd_debug(SMB,
3045 				    "get query maximal access context\n");
3046 			maximal_access_ctxt = 1;
3047 		}
3048 
3049 		context = smb2_find_context_vals(req,
3050 						 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3051 		if (IS_ERR(context)) {
3052 			rc = PTR_ERR(context);
3053 			goto err_out2;
3054 		} else if (context) {
3055 			ksmbd_debug(SMB, "get timewarp context\n");
3056 			rc = -EBADF;
3057 			goto err_out2;
3058 		}
3059 
3060 		if (tcon->posix_extensions) {
3061 			context = smb2_find_context_vals(req,
3062 							 SMB2_CREATE_TAG_POSIX, 16);
3063 			if (IS_ERR(context)) {
3064 				rc = PTR_ERR(context);
3065 				goto err_out2;
3066 			} else if (context) {
3067 				struct create_posix *posix =
3068 					(struct create_posix *)context;
3069 				if (le16_to_cpu(context->DataOffset) +
3070 				    le32_to_cpu(context->DataLength) <
3071 				    sizeof(struct create_posix) - 4) {
3072 					rc = -EINVAL;
3073 					goto err_out2;
3074 				}
3075 				ksmbd_debug(SMB, "get posix context\n");
3076 
3077 				posix_mode = le32_to_cpu(posix->Mode);
3078 				posix_ctxt = 1;
3079 			}
3080 		}
3081 	}
3082 
3083 	if (ksmbd_override_fsids(work)) {
3084 		rc = -ENOMEM;
3085 		goto err_out2;
3086 	}
3087 
3088 	rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3089 					&parent_path, &path, 1);
3090 	if (!rc) {
3091 		file_present = true;
3092 
3093 		if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3094 			/*
3095 			 * If file exists with under flags, return access
3096 			 * denied error.
3097 			 */
3098 			if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3099 			    req->CreateDisposition == FILE_OPEN_IF_LE) {
3100 				rc = -EACCES;
3101 				goto err_out;
3102 			}
3103 
3104 			if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3105 				ksmbd_debug(SMB,
3106 					    "User does not have write permission\n");
3107 				rc = -EACCES;
3108 				goto err_out;
3109 			}
3110 		} else if (d_is_symlink(path.dentry)) {
3111 			rc = -EACCES;
3112 			goto err_out;
3113 		}
3114 
3115 		idmap = mnt_idmap(path.mnt);
3116 	} else {
3117 		if (rc != -ENOENT)
3118 			goto err_out;
3119 		ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3120 			    name, rc);
3121 		rc = 0;
3122 	}
3123 
3124 	if (stream_name) {
3125 		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3126 			if (s_type == DATA_STREAM) {
3127 				rc = -EIO;
3128 				rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3129 			}
3130 		} else {
3131 			if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3132 			    s_type == DATA_STREAM) {
3133 				rc = -EIO;
3134 				rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3135 			}
3136 		}
3137 
3138 		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3139 		    req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3140 			rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3141 			rc = -EIO;
3142 		}
3143 
3144 		if (rc < 0)
3145 			goto err_out;
3146 	}
3147 
3148 	if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3149 	    S_ISDIR(d_inode(path.dentry)->i_mode) &&
3150 	    !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3151 		ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3152 			    name, req->CreateOptions);
3153 		rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3154 		rc = -EIO;
3155 		goto err_out;
3156 	}
3157 
3158 	if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3159 	    !(req->CreateDisposition == FILE_CREATE_LE) &&
3160 	    !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3161 		rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3162 		rc = -EIO;
3163 		goto err_out;
3164 	}
3165 
3166 	if (!stream_name && file_present &&
3167 	    req->CreateDisposition == FILE_CREATE_LE) {
3168 		rc = -EEXIST;
3169 		goto err_out;
3170 	}
3171 
3172 	daccess = smb_map_generic_desired_access(req->DesiredAccess);
3173 
3174 	if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3175 		rc = smb_check_perm_dacl(conn, &path, &daccess,
3176 					 sess->user->uid);
3177 		if (rc)
3178 			goto err_out;
3179 	}
3180 
3181 	if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3182 		if (!file_present) {
3183 			daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3184 		} else {
3185 			ksmbd_vfs_query_maximal_access(idmap,
3186 							    path.dentry,
3187 							    &daccess);
3188 			already_permitted = true;
3189 		}
3190 		maximal_access = daccess;
3191 	}
3192 
3193 	open_flags = smb2_create_open_flags(file_present, daccess,
3194 					    req->CreateDisposition,
3195 					    &may_flags,
3196 					    req->CreateOptions,
3197 					    file_present ? d_inode(path.dentry)->i_mode : 0);
3198 
3199 	if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3200 		if (open_flags & (O_CREAT | O_TRUNC)) {
3201 			ksmbd_debug(SMB,
3202 				    "User does not have write permission\n");
3203 			rc = -EACCES;
3204 			goto err_out;
3205 		}
3206 	}
3207 
3208 	/*create file if not present */
3209 	if (!file_present) {
3210 		rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3211 				posix_mode,
3212 				req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3213 		if (rc) {
3214 			if (rc == -ENOENT) {
3215 				rc = -EIO;
3216 				rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3217 			}
3218 			goto err_out;
3219 		}
3220 
3221 		created = true;
3222 		idmap = mnt_idmap(path.mnt);
3223 		if (ea_buf) {
3224 			if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3225 			    sizeof(struct smb2_ea_info)) {
3226 				rc = -EINVAL;
3227 				goto err_out;
3228 			}
3229 
3230 			rc = smb2_set_ea(&ea_buf->ea,
3231 					 le32_to_cpu(ea_buf->ccontext.DataLength),
3232 					 &path, false);
3233 			if (rc == -EOPNOTSUPP)
3234 				rc = 0;
3235 			else if (rc)
3236 				goto err_out;
3237 		}
3238 	} else if (!already_permitted) {
3239 		/* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3240 		 * because execute(search) permission on a parent directory,
3241 		 * is already granted.
3242 		 */
3243 		if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3244 			rc = inode_permission(idmap,
3245 					      d_inode(path.dentry),
3246 					      may_flags);
3247 			if (rc)
3248 				goto err_out;
3249 
3250 			if ((daccess & FILE_DELETE_LE) ||
3251 			    (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3252 				rc = inode_permission(idmap,
3253 						      d_inode(path.dentry->d_parent),
3254 						      MAY_EXEC | MAY_WRITE);
3255 				if (rc)
3256 					goto err_out;
3257 			}
3258 		}
3259 	}
3260 
3261 	rc = ksmbd_query_inode_status(path.dentry->d_parent);
3262 	if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3263 		rc = -EBUSY;
3264 		goto err_out;
3265 	}
3266 
3267 	rc = 0;
3268 	filp = dentry_open(&path, open_flags, current_cred());
3269 	if (IS_ERR(filp)) {
3270 		rc = PTR_ERR(filp);
3271 		pr_err("dentry open for dir failed, rc %d\n", rc);
3272 		goto err_out;
3273 	}
3274 
3275 	if (file_present) {
3276 		if (!(open_flags & O_TRUNC))
3277 			file_info = FILE_OPENED;
3278 		else
3279 			file_info = FILE_OVERWRITTEN;
3280 
3281 		if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3282 		    FILE_SUPERSEDE_LE)
3283 			file_info = FILE_SUPERSEDED;
3284 	} else if (open_flags & O_CREAT) {
3285 		file_info = FILE_CREATED;
3286 	}
3287 
3288 	ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3289 
3290 	/* Obtain Volatile-ID */
3291 	fp = ksmbd_open_fd(work, filp);
3292 	if (IS_ERR(fp)) {
3293 		fput(filp);
3294 		rc = PTR_ERR(fp);
3295 		fp = NULL;
3296 		goto err_out;
3297 	}
3298 
3299 	/* Get Persistent-ID */
3300 	ksmbd_open_durable_fd(fp);
3301 	if (!has_file_id(fp->persistent_id)) {
3302 		rc = -ENOMEM;
3303 		goto err_out;
3304 	}
3305 
3306 	fp->cdoption = req->CreateDisposition;
3307 	fp->daccess = daccess;
3308 	fp->saccess = req->ShareAccess;
3309 	fp->coption = req->CreateOptions;
3310 
3311 	/* Set default windows and posix acls if creating new file */
3312 	if (created) {
3313 		int posix_acl_rc;
3314 		struct inode *inode = d_inode(path.dentry);
3315 
3316 		posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3317 							   &path,
3318 							   d_inode(path.dentry->d_parent));
3319 		if (posix_acl_rc)
3320 			ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3321 
3322 		if (test_share_config_flag(work->tcon->share_conf,
3323 					   KSMBD_SHARE_FLAG_ACL_XATTR)) {
3324 			rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3325 					      sess->user->gid);
3326 		}
3327 
3328 		if (rc) {
3329 			rc = smb2_create_sd_buffer(work, req, &path);
3330 			if (rc) {
3331 				if (posix_acl_rc)
3332 					ksmbd_vfs_set_init_posix_acl(idmap,
3333 								     &path);
3334 
3335 				if (test_share_config_flag(work->tcon->share_conf,
3336 							   KSMBD_SHARE_FLAG_ACL_XATTR)) {
3337 					struct smb_fattr fattr;
3338 					struct smb_ntsd *pntsd;
3339 					int pntsd_size, ace_num = 0;
3340 
3341 					ksmbd_acls_fattr(&fattr, idmap, inode);
3342 					if (fattr.cf_acls)
3343 						ace_num = fattr.cf_acls->a_count;
3344 					if (fattr.cf_dacls)
3345 						ace_num += fattr.cf_dacls->a_count;
3346 
3347 					pntsd = kmalloc(sizeof(struct smb_ntsd) +
3348 							sizeof(struct smb_sid) * 3 +
3349 							sizeof(struct smb_acl) +
3350 							sizeof(struct smb_ace) * ace_num * 2,
3351 							KSMBD_DEFAULT_GFP);
3352 					if (!pntsd) {
3353 						posix_acl_release(fattr.cf_acls);
3354 						posix_acl_release(fattr.cf_dacls);
3355 						goto err_out;
3356 					}
3357 
3358 					rc = build_sec_desc(idmap,
3359 							    pntsd, NULL, 0,
3360 							    OWNER_SECINFO |
3361 							    GROUP_SECINFO |
3362 							    DACL_SECINFO,
3363 							    &pntsd_size, &fattr);
3364 					posix_acl_release(fattr.cf_acls);
3365 					posix_acl_release(fattr.cf_dacls);
3366 					if (rc) {
3367 						kfree(pntsd);
3368 						goto err_out;
3369 					}
3370 
3371 					rc = ksmbd_vfs_set_sd_xattr(conn,
3372 								    idmap,
3373 								    &path,
3374 								    pntsd,
3375 								    pntsd_size,
3376 								    false);
3377 					kfree(pntsd);
3378 					if (rc)
3379 						pr_err("failed to store ntacl in xattr : %d\n",
3380 						       rc);
3381 				}
3382 			}
3383 		}
3384 		rc = 0;
3385 	}
3386 
3387 	if (stream_name) {
3388 		rc = smb2_set_stream_name_xattr(&path,
3389 						fp,
3390 						stream_name,
3391 						s_type);
3392 		if (rc)
3393 			goto err_out;
3394 		file_info = FILE_CREATED;
3395 	}
3396 
3397 	fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3398 			FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3399 
3400 	/* fp should be searchable through ksmbd_inode.m_fp_list
3401 	 * after daccess, saccess, attrib_only, and stream are
3402 	 * initialized.
3403 	 */
3404 	down_write(&fp->f_ci->m_lock);
3405 	list_add(&fp->node, &fp->f_ci->m_fp_list);
3406 	up_write(&fp->f_ci->m_lock);
3407 
3408 	/* Check delete pending among previous fp before oplock break */
3409 	if (ksmbd_inode_pending_delete(fp)) {
3410 		rc = -EBUSY;
3411 		goto err_out;
3412 	}
3413 
3414 	if (file_present || created)
3415 		ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3416 
3417 	if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3418 	    !fp->attrib_only && !stream_name) {
3419 		smb_break_all_oplock(work, fp);
3420 		need_truncate = 1;
3421 	}
3422 
3423 	share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3424 	if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3425 	    (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3426 	     !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3427 		if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3428 			rc = share_ret;
3429 			goto err_out1;
3430 		}
3431 	} else {
3432 		if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {
3433 			if (S_ISDIR(file_inode(filp)->i_mode)) {
3434 				lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3435 				lc->is_dir = true;
3436 			}
3437 
3438 			/*
3439 			 * Compare parent lease using parent key. If there is no
3440 			 * a lease that has same parent key, Send lease break
3441 			 * notification.
3442 			 */
3443 			smb_send_parent_lease_break_noti(fp, lc);
3444 
3445 			req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3446 			ksmbd_debug(SMB,
3447 				    "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3448 				    name, req_op_level, lc->req_state);
3449 			rc = find_same_lease_key(sess, fp->f_ci, lc);
3450 			if (rc)
3451 				goto err_out1;
3452 		} else if (open_flags == O_RDONLY &&
3453 			   (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3454 			    req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3455 			req_op_level = SMB2_OPLOCK_LEVEL_II;
3456 
3457 		rc = smb_grant_oplock(work, req_op_level,
3458 				      fp->persistent_id, fp,
3459 				      le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3460 				      lc, share_ret);
3461 		if (rc < 0)
3462 			goto err_out1;
3463 	}
3464 
3465 	if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3466 		ksmbd_fd_set_delete_on_close(fp, file_info);
3467 
3468 	if (need_truncate) {
3469 		rc = smb2_create_truncate(&fp->filp->f_path);
3470 		if (rc)
3471 			goto err_out1;
3472 	}
3473 
3474 	if (req->CreateContextsOffset) {
3475 		struct create_alloc_size_req *az_req;
3476 
3477 		az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3478 					SMB2_CREATE_ALLOCATION_SIZE, 4);
3479 		if (IS_ERR(az_req)) {
3480 			rc = PTR_ERR(az_req);
3481 			goto err_out1;
3482 		} else if (az_req) {
3483 			loff_t alloc_size;
3484 			int err;
3485 
3486 			if (le16_to_cpu(az_req->ccontext.DataOffset) +
3487 			    le32_to_cpu(az_req->ccontext.DataLength) <
3488 			    sizeof(struct create_alloc_size_req)) {
3489 				rc = -EINVAL;
3490 				goto err_out1;
3491 			}
3492 			alloc_size = le64_to_cpu(az_req->AllocationSize);
3493 			ksmbd_debug(SMB,
3494 				    "request smb2 create allocate size : %llu\n",
3495 				    alloc_size);
3496 			smb_break_all_levII_oplock(work, fp, 1);
3497 			err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3498 					    alloc_size);
3499 			if (err < 0)
3500 				ksmbd_debug(SMB,
3501 					    "vfs_fallocate is failed : %d\n",
3502 					    err);
3503 		}
3504 
3505 		context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3506 		if (IS_ERR(context)) {
3507 			rc = PTR_ERR(context);
3508 			goto err_out1;
3509 		} else if (context) {
3510 			ksmbd_debug(SMB, "get query on disk id context\n");
3511 			query_disk_id = 1;
3512 		}
3513 	}
3514 
3515 	rc = ksmbd_vfs_getattr(&path, &stat);
3516 	if (rc)
3517 		goto err_out1;
3518 
3519 	if (stat.result_mask & STATX_BTIME)
3520 		fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3521 	else
3522 		fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3523 	if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3524 		fp->f_ci->m_fattr =
3525 			cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3526 
3527 	if (!created)
3528 		smb2_update_xattrs(tcon, &path, fp);
3529 	else
3530 		smb2_new_xattrs(tcon, &path, fp);
3531 
3532 	memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3533 
3534 	if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3535 		if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3536 		    test_share_config_flag(work->tcon->share_conf,
3537 					   KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3538 			fp->is_persistent = true;
3539 		else
3540 			fp->is_durable = true;
3541 
3542 		if (dh_info.type == DURABLE_REQ_V2) {
3543 			memcpy(fp->create_guid, dh_info.CreateGuid,
3544 					SMB2_CREATE_GUID_SIZE);
3545 			if (dh_info.timeout)
3546 				fp->durable_timeout =
3547 					min_t(unsigned int, dh_info.timeout,
3548 					      DURABLE_HANDLE_MAX_TIMEOUT);
3549 			else
3550 				fp->durable_timeout = 60;
3551 		}
3552 	}
3553 
3554 reconnected_fp:
3555 	rsp->StructureSize = cpu_to_le16(89);
3556 	rcu_read_lock();
3557 	opinfo = rcu_dereference(fp->f_opinfo);
3558 	rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3559 	rcu_read_unlock();
3560 	rsp->Flags = 0;
3561 	rsp->CreateAction = cpu_to_le32(file_info);
3562 	rsp->CreationTime = cpu_to_le64(fp->create_time);
3563 	time = ksmbd_UnixTimeToNT(stat.atime);
3564 	rsp->LastAccessTime = cpu_to_le64(time);
3565 	time = ksmbd_UnixTimeToNT(stat.mtime);
3566 	rsp->LastWriteTime = cpu_to_le64(time);
3567 	time = ksmbd_UnixTimeToNT(stat.ctime);
3568 	rsp->ChangeTime = cpu_to_le64(time);
3569 	rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3570 		cpu_to_le64(stat.blocks << 9);
3571 	rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3572 	rsp->FileAttributes = fp->f_ci->m_fattr;
3573 
3574 	rsp->Reserved2 = 0;
3575 
3576 	rsp->PersistentFileId = fp->persistent_id;
3577 	rsp->VolatileFileId = fp->volatile_id;
3578 
3579 	rsp->CreateContextsOffset = 0;
3580 	rsp->CreateContextsLength = 0;
3581 	iov_len = offsetof(struct smb2_create_rsp, Buffer);
3582 
3583 	/* If lease is request send lease context response */
3584 	if (opinfo && opinfo->is_lease) {
3585 		struct create_context *lease_ccontext;
3586 
3587 		ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3588 			    name, opinfo->o_lease->state);
3589 		rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3590 
3591 		lease_ccontext = (struct create_context *)rsp->Buffer;
3592 		contxt_cnt++;
3593 		create_lease_buf(rsp->Buffer, opinfo->o_lease);
3594 		le32_add_cpu(&rsp->CreateContextsLength,
3595 			     conn->vals->create_lease_size);
3596 		iov_len += conn->vals->create_lease_size;
3597 		next_ptr = &lease_ccontext->Next;
3598 		next_off = conn->vals->create_lease_size;
3599 	}
3600 
3601 	if (maximal_access_ctxt) {
3602 		struct create_context *mxac_ccontext;
3603 
3604 		if (maximal_access == 0)
3605 			ksmbd_vfs_query_maximal_access(idmap,
3606 						       path.dentry,
3607 						       &maximal_access);
3608 		mxac_ccontext = (struct create_context *)(rsp->Buffer +
3609 				le32_to_cpu(rsp->CreateContextsLength));
3610 		contxt_cnt++;
3611 		create_mxac_rsp_buf(rsp->Buffer +
3612 				le32_to_cpu(rsp->CreateContextsLength),
3613 				le32_to_cpu(maximal_access));
3614 		le32_add_cpu(&rsp->CreateContextsLength,
3615 			     conn->vals->create_mxac_size);
3616 		iov_len += conn->vals->create_mxac_size;
3617 		if (next_ptr)
3618 			*next_ptr = cpu_to_le32(next_off);
3619 		next_ptr = &mxac_ccontext->Next;
3620 		next_off = conn->vals->create_mxac_size;
3621 	}
3622 
3623 	if (query_disk_id) {
3624 		struct create_context *disk_id_ccontext;
3625 
3626 		disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3627 				le32_to_cpu(rsp->CreateContextsLength));
3628 		contxt_cnt++;
3629 		create_disk_id_rsp_buf(rsp->Buffer +
3630 				le32_to_cpu(rsp->CreateContextsLength),
3631 				stat.ino, tcon->id);
3632 		le32_add_cpu(&rsp->CreateContextsLength,
3633 			     conn->vals->create_disk_id_size);
3634 		iov_len += conn->vals->create_disk_id_size;
3635 		if (next_ptr)
3636 			*next_ptr = cpu_to_le32(next_off);
3637 		next_ptr = &disk_id_ccontext->Next;
3638 		next_off = conn->vals->create_disk_id_size;
3639 	}
3640 
3641 	if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3642 		struct create_context *durable_ccontext;
3643 
3644 		durable_ccontext = (struct create_context *)(rsp->Buffer +
3645 				le32_to_cpu(rsp->CreateContextsLength));
3646 		contxt_cnt++;
3647 		if (dh_info.type == DURABLE_REQ) {
3648 			create_durable_rsp_buf(rsp->Buffer +
3649 					le32_to_cpu(rsp->CreateContextsLength));
3650 			le32_add_cpu(&rsp->CreateContextsLength,
3651 					conn->vals->create_durable_size);
3652 			iov_len += conn->vals->create_durable_size;
3653 		} else {
3654 			create_durable_v2_rsp_buf(rsp->Buffer +
3655 					le32_to_cpu(rsp->CreateContextsLength),
3656 					fp);
3657 			le32_add_cpu(&rsp->CreateContextsLength,
3658 					conn->vals->create_durable_v2_size);
3659 			iov_len += conn->vals->create_durable_v2_size;
3660 		}
3661 
3662 		if (next_ptr)
3663 			*next_ptr = cpu_to_le32(next_off);
3664 		next_ptr = &durable_ccontext->Next;
3665 		next_off = conn->vals->create_durable_size;
3666 	}
3667 
3668 	if (posix_ctxt) {
3669 		contxt_cnt++;
3670 		create_posix_rsp_buf(rsp->Buffer +
3671 				le32_to_cpu(rsp->CreateContextsLength),
3672 				fp);
3673 		le32_add_cpu(&rsp->CreateContextsLength,
3674 			     conn->vals->create_posix_size);
3675 		iov_len += conn->vals->create_posix_size;
3676 		if (next_ptr)
3677 			*next_ptr = cpu_to_le32(next_off);
3678 	}
3679 
3680 	if (contxt_cnt > 0) {
3681 		rsp->CreateContextsOffset =
3682 			cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3683 	}
3684 
3685 err_out:
3686 	if (rc && (file_present || created))
3687 		ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3688 
3689 err_out1:
3690 	ksmbd_revert_fsids(work);
3691 
3692 err_out2:
3693 	if (!rc) {
3694 		ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3695 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3696 	}
3697 	if (rc) {
3698 		if (rc == -EINVAL)
3699 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3700 		else if (rc == -EOPNOTSUPP)
3701 			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3702 		else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3703 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
3704 		else if (rc == -ENOENT)
3705 			rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3706 		else if (rc == -EPERM)
3707 			rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3708 		else if (rc == -EBUSY)
3709 			rsp->hdr.Status = STATUS_DELETE_PENDING;
3710 		else if (rc == -EBADF)
3711 			rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3712 		else if (rc == -ENOEXEC)
3713 			rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3714 		else if (rc == -ENXIO)
3715 			rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3716 		else if (rc == -EEXIST)
3717 			rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3718 		else if (rc == -EMFILE)
3719 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3720 		if (!rsp->hdr.Status)
3721 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3722 
3723 		if (fp)
3724 			ksmbd_fd_put(work, fp);
3725 		smb2_set_err_rsp(work);
3726 		ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3727 	}
3728 
3729 	kfree(name);
3730 	kfree(lc);
3731 
3732 	return rc;
3733 }
3734 
readdir_info_level_struct_sz(int info_level)3735 static int readdir_info_level_struct_sz(int info_level)
3736 {
3737 	switch (info_level) {
3738 	case FILE_FULL_DIRECTORY_INFORMATION:
3739 		return sizeof(struct file_full_directory_info);
3740 	case FILE_BOTH_DIRECTORY_INFORMATION:
3741 		return sizeof(struct file_both_directory_info);
3742 	case FILE_DIRECTORY_INFORMATION:
3743 		return sizeof(struct file_directory_info);
3744 	case FILE_NAMES_INFORMATION:
3745 		return sizeof(struct file_names_info);
3746 	case FILEID_FULL_DIRECTORY_INFORMATION:
3747 		return sizeof(struct file_id_full_dir_info);
3748 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3749 		return sizeof(struct file_id_both_directory_info);
3750 	case SMB_FIND_FILE_POSIX_INFO:
3751 		return sizeof(struct smb2_posix_info);
3752 	default:
3753 		return -EOPNOTSUPP;
3754 	}
3755 }
3756 
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3757 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3758 {
3759 	switch (info_level) {
3760 	case FILE_FULL_DIRECTORY_INFORMATION:
3761 	{
3762 		struct file_full_directory_info *ffdinfo;
3763 
3764 		ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3765 		d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3766 		d_info->name = ffdinfo->FileName;
3767 		d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3768 		return 0;
3769 	}
3770 	case FILE_BOTH_DIRECTORY_INFORMATION:
3771 	{
3772 		struct file_both_directory_info *fbdinfo;
3773 
3774 		fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3775 		d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3776 		d_info->name = fbdinfo->FileName;
3777 		d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3778 		return 0;
3779 	}
3780 	case FILE_DIRECTORY_INFORMATION:
3781 	{
3782 		struct file_directory_info *fdinfo;
3783 
3784 		fdinfo = (struct file_directory_info *)d_info->rptr;
3785 		d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3786 		d_info->name = fdinfo->FileName;
3787 		d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3788 		return 0;
3789 	}
3790 	case FILE_NAMES_INFORMATION:
3791 	{
3792 		struct file_names_info *fninfo;
3793 
3794 		fninfo = (struct file_names_info *)d_info->rptr;
3795 		d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3796 		d_info->name = fninfo->FileName;
3797 		d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3798 		return 0;
3799 	}
3800 	case FILEID_FULL_DIRECTORY_INFORMATION:
3801 	{
3802 		struct file_id_full_dir_info *dinfo;
3803 
3804 		dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3805 		d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3806 		d_info->name = dinfo->FileName;
3807 		d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3808 		return 0;
3809 	}
3810 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3811 	{
3812 		struct file_id_both_directory_info *fibdinfo;
3813 
3814 		fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3815 		d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3816 		d_info->name = fibdinfo->FileName;
3817 		d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3818 		return 0;
3819 	}
3820 	case SMB_FIND_FILE_POSIX_INFO:
3821 	{
3822 		struct smb2_posix_info *posix_info;
3823 
3824 		posix_info = (struct smb2_posix_info *)d_info->rptr;
3825 		d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3826 		d_info->name = posix_info->name;
3827 		d_info->name_len = le32_to_cpu(posix_info->name_len);
3828 		return 0;
3829 	}
3830 	default:
3831 		return -EINVAL;
3832 	}
3833 }
3834 
3835 /**
3836  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3837  * buffer
3838  * @conn:	connection instance
3839  * @info_level:	smb information level
3840  * @d_info:	structure included variables for query dir
3841  * @ksmbd_kstat:	ksmbd wrapper of dirent stat information
3842  *
3843  * if directory has many entries, find first can't read it fully.
3844  * find next might be called multiple times to read remaining dir entries
3845  *
3846  * Return:	0 on success, otherwise error
3847  */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3848 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3849 				       struct ksmbd_dir_info *d_info,
3850 				       struct ksmbd_kstat *ksmbd_kstat)
3851 {
3852 	int next_entry_offset = 0;
3853 	char *conv_name;
3854 	int conv_len;
3855 	void *kstat;
3856 	int struct_sz, rc = 0;
3857 
3858 	conv_name = ksmbd_convert_dir_info_name(d_info,
3859 						conn->local_nls,
3860 						&conv_len);
3861 	if (!conv_name)
3862 		return -ENOMEM;
3863 
3864 	/* Somehow the name has only terminating NULL bytes */
3865 	if (conv_len < 0) {
3866 		rc = -EINVAL;
3867 		goto free_conv_name;
3868 	}
3869 
3870 	struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3871 	next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3872 	d_info->last_entry_off_align = next_entry_offset - struct_sz;
3873 
3874 	if (next_entry_offset > d_info->out_buf_len) {
3875 		d_info->out_buf_len = 0;
3876 		rc = -ENOSPC;
3877 		goto free_conv_name;
3878 	}
3879 
3880 	kstat = d_info->wptr;
3881 	if (info_level != FILE_NAMES_INFORMATION)
3882 		kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3883 
3884 	switch (info_level) {
3885 	case FILE_FULL_DIRECTORY_INFORMATION:
3886 	{
3887 		struct file_full_directory_info *ffdinfo;
3888 
3889 		ffdinfo = (struct file_full_directory_info *)kstat;
3890 		ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3891 		ffdinfo->EaSize =
3892 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3893 		if (ffdinfo->EaSize)
3894 			ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3895 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3896 			ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3897 		memcpy(ffdinfo->FileName, conv_name, conv_len);
3898 		ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3899 		break;
3900 	}
3901 	case FILE_BOTH_DIRECTORY_INFORMATION:
3902 	{
3903 		struct file_both_directory_info *fbdinfo;
3904 
3905 		fbdinfo = (struct file_both_directory_info *)kstat;
3906 		fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3907 		fbdinfo->EaSize =
3908 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3909 		if (fbdinfo->EaSize)
3910 			fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3911 		fbdinfo->ShortNameLength = 0;
3912 		fbdinfo->Reserved = 0;
3913 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3914 			fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3915 		memcpy(fbdinfo->FileName, conv_name, conv_len);
3916 		fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3917 		break;
3918 	}
3919 	case FILE_DIRECTORY_INFORMATION:
3920 	{
3921 		struct file_directory_info *fdinfo;
3922 
3923 		fdinfo = (struct file_directory_info *)kstat;
3924 		fdinfo->FileNameLength = cpu_to_le32(conv_len);
3925 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3926 			fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3927 		memcpy(fdinfo->FileName, conv_name, conv_len);
3928 		fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3929 		break;
3930 	}
3931 	case FILE_NAMES_INFORMATION:
3932 	{
3933 		struct file_names_info *fninfo;
3934 
3935 		fninfo = (struct file_names_info *)kstat;
3936 		fninfo->FileNameLength = cpu_to_le32(conv_len);
3937 		memcpy(fninfo->FileName, conv_name, conv_len);
3938 		fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3939 		break;
3940 	}
3941 	case FILEID_FULL_DIRECTORY_INFORMATION:
3942 	{
3943 		struct file_id_full_dir_info *dinfo;
3944 
3945 		dinfo = (struct file_id_full_dir_info *)kstat;
3946 		dinfo->FileNameLength = cpu_to_le32(conv_len);
3947 		dinfo->EaSize =
3948 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3949 		if (dinfo->EaSize)
3950 			dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3951 		dinfo->Reserved = 0;
3952 		dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3953 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3954 			dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3955 		memcpy(dinfo->FileName, conv_name, conv_len);
3956 		dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3957 		break;
3958 	}
3959 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3960 	{
3961 		struct file_id_both_directory_info *fibdinfo;
3962 
3963 		fibdinfo = (struct file_id_both_directory_info *)kstat;
3964 		fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3965 		fibdinfo->EaSize =
3966 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3967 		if (fibdinfo->EaSize)
3968 			fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3969 		fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3970 		fibdinfo->ShortNameLength = 0;
3971 		fibdinfo->Reserved = 0;
3972 		fibdinfo->Reserved2 = cpu_to_le16(0);
3973 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3974 			fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3975 		memcpy(fibdinfo->FileName, conv_name, conv_len);
3976 		fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3977 		break;
3978 	}
3979 	case SMB_FIND_FILE_POSIX_INFO:
3980 	{
3981 		struct smb2_posix_info *posix_info;
3982 		u64 time;
3983 
3984 		posix_info = (struct smb2_posix_info *)kstat;
3985 		posix_info->Ignored = 0;
3986 		posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3987 		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3988 		posix_info->ChangeTime = cpu_to_le64(time);
3989 		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3990 		posix_info->LastAccessTime = cpu_to_le64(time);
3991 		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3992 		posix_info->LastWriteTime = cpu_to_le64(time);
3993 		posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3994 		posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3995 		posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3996 		posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3997 		posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3998 		switch (ksmbd_kstat->kstat->mode & S_IFMT) {
3999 		case S_IFDIR:
4000 			posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT);
4001 			break;
4002 		case S_IFLNK:
4003 			posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT);
4004 			break;
4005 		case S_IFCHR:
4006 			posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT);
4007 			break;
4008 		case S_IFBLK:
4009 			posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT);
4010 			break;
4011 		case S_IFIFO:
4012 			posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT);
4013 			break;
4014 		case S_IFSOCK:
4015 			posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT);
4016 		}
4017 
4018 		posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
4019 		posix_info->DosAttributes =
4020 			S_ISDIR(ksmbd_kstat->kstat->mode) ?
4021 				FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
4022 		if (d_info->hide_dot_file && d_info->name[0] == '.')
4023 			posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
4024 		/*
4025 		 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4026 		 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4027 		 *		  sub_auth(4 * 1(num_subauth)) + RID(4).
4028 		 */
4029 		id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
4030 			  SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
4031 		id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
4032 			  SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
4033 		memcpy(posix_info->name, conv_name, conv_len);
4034 		posix_info->name_len = cpu_to_le32(conv_len);
4035 		posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
4036 		break;
4037 	}
4038 
4039 	} /* switch (info_level) */
4040 
4041 	d_info->last_entry_offset = d_info->data_count;
4042 	d_info->data_count += next_entry_offset;
4043 	d_info->out_buf_len -= next_entry_offset;
4044 	d_info->wptr += next_entry_offset;
4045 
4046 	ksmbd_debug(SMB,
4047 		    "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4048 		    info_level, d_info->out_buf_len,
4049 		    next_entry_offset, d_info->data_count);
4050 
4051 free_conv_name:
4052 	kfree(conv_name);
4053 	return rc;
4054 }
4055 
4056 struct smb2_query_dir_private {
4057 	struct ksmbd_work	*work;
4058 	char			*search_pattern;
4059 	struct ksmbd_file	*dir_fp;
4060 
4061 	struct ksmbd_dir_info	*d_info;
4062 	int			info_level;
4063 };
4064 
lock_dir(struct ksmbd_file * dir_fp)4065 static void lock_dir(struct ksmbd_file *dir_fp)
4066 {
4067 	struct dentry *dir = dir_fp->filp->f_path.dentry;
4068 
4069 	inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4070 }
4071 
unlock_dir(struct ksmbd_file * dir_fp)4072 static void unlock_dir(struct ksmbd_file *dir_fp)
4073 {
4074 	struct dentry *dir = dir_fp->filp->f_path.dentry;
4075 
4076 	inode_unlock(d_inode(dir));
4077 }
4078 
process_query_dir_entries(struct smb2_query_dir_private * priv)4079 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4080 {
4081 	struct mnt_idmap	*idmap = file_mnt_idmap(priv->dir_fp->filp);
4082 	struct kstat		kstat;
4083 	struct ksmbd_kstat	ksmbd_kstat;
4084 	int			rc;
4085 	int			i;
4086 
4087 	for (i = 0; i < priv->d_info->num_entry; i++) {
4088 		struct dentry *dent;
4089 
4090 		if (dentry_name(priv->d_info, priv->info_level))
4091 			return -EINVAL;
4092 
4093 		lock_dir(priv->dir_fp);
4094 		dent = lookup_one(idmap, priv->d_info->name,
4095 				  priv->dir_fp->filp->f_path.dentry,
4096 				  priv->d_info->name_len);
4097 		unlock_dir(priv->dir_fp);
4098 
4099 		if (IS_ERR(dent)) {
4100 			ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4101 				    priv->d_info->name,
4102 				    PTR_ERR(dent));
4103 			continue;
4104 		}
4105 		if (unlikely(d_is_negative(dent))) {
4106 			dput(dent);
4107 			ksmbd_debug(SMB, "Negative dentry `%s'\n",
4108 				    priv->d_info->name);
4109 			continue;
4110 		}
4111 
4112 		ksmbd_kstat.kstat = &kstat;
4113 		if (priv->info_level != FILE_NAMES_INFORMATION) {
4114 			rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4115 							 idmap,
4116 							 dent,
4117 							 &ksmbd_kstat);
4118 			if (rc) {
4119 				dput(dent);
4120 				continue;
4121 			}
4122 		}
4123 
4124 		rc = smb2_populate_readdir_entry(priv->work->conn,
4125 						 priv->info_level,
4126 						 priv->d_info,
4127 						 &ksmbd_kstat);
4128 		dput(dent);
4129 		if (rc)
4130 			return rc;
4131 	}
4132 	return 0;
4133 }
4134 
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)4135 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4136 				   int info_level)
4137 {
4138 	int struct_sz;
4139 	int conv_len;
4140 	int next_entry_offset;
4141 
4142 	struct_sz = readdir_info_level_struct_sz(info_level);
4143 	if (struct_sz == -EOPNOTSUPP)
4144 		return -EOPNOTSUPP;
4145 
4146 	conv_len = (d_info->name_len + 1) * 2;
4147 	next_entry_offset = ALIGN(struct_sz + conv_len,
4148 				  KSMBD_DIR_INFO_ALIGNMENT);
4149 
4150 	if (next_entry_offset > d_info->out_buf_len) {
4151 		d_info->out_buf_len = 0;
4152 		return -ENOSPC;
4153 	}
4154 
4155 	switch (info_level) {
4156 	case FILE_FULL_DIRECTORY_INFORMATION:
4157 	{
4158 		struct file_full_directory_info *ffdinfo;
4159 
4160 		ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4161 		memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4162 		ffdinfo->FileName[d_info->name_len] = 0x00;
4163 		ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4164 		ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4165 		break;
4166 	}
4167 	case FILE_BOTH_DIRECTORY_INFORMATION:
4168 	{
4169 		struct file_both_directory_info *fbdinfo;
4170 
4171 		fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4172 		memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4173 		fbdinfo->FileName[d_info->name_len] = 0x00;
4174 		fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4175 		fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4176 		break;
4177 	}
4178 	case FILE_DIRECTORY_INFORMATION:
4179 	{
4180 		struct file_directory_info *fdinfo;
4181 
4182 		fdinfo = (struct file_directory_info *)d_info->wptr;
4183 		memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4184 		fdinfo->FileName[d_info->name_len] = 0x00;
4185 		fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4186 		fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4187 		break;
4188 	}
4189 	case FILE_NAMES_INFORMATION:
4190 	{
4191 		struct file_names_info *fninfo;
4192 
4193 		fninfo = (struct file_names_info *)d_info->wptr;
4194 		memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4195 		fninfo->FileName[d_info->name_len] = 0x00;
4196 		fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4197 		fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4198 		break;
4199 	}
4200 	case FILEID_FULL_DIRECTORY_INFORMATION:
4201 	{
4202 		struct file_id_full_dir_info *dinfo;
4203 
4204 		dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4205 		memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4206 		dinfo->FileName[d_info->name_len] = 0x00;
4207 		dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4208 		dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4209 		break;
4210 	}
4211 	case FILEID_BOTH_DIRECTORY_INFORMATION:
4212 	{
4213 		struct file_id_both_directory_info *fibdinfo;
4214 
4215 		fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4216 		memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4217 		fibdinfo->FileName[d_info->name_len] = 0x00;
4218 		fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4219 		fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4220 		break;
4221 	}
4222 	case SMB_FIND_FILE_POSIX_INFO:
4223 	{
4224 		struct smb2_posix_info *posix_info;
4225 
4226 		posix_info = (struct smb2_posix_info *)d_info->wptr;
4227 		memcpy(posix_info->name, d_info->name, d_info->name_len);
4228 		posix_info->name[d_info->name_len] = 0x00;
4229 		posix_info->name_len = cpu_to_le32(d_info->name_len);
4230 		posix_info->NextEntryOffset =
4231 			cpu_to_le32(next_entry_offset);
4232 		break;
4233 	}
4234 	} /* switch (info_level) */
4235 
4236 	d_info->num_entry++;
4237 	d_info->out_buf_len -= next_entry_offset;
4238 	d_info->wptr += next_entry_offset;
4239 	return 0;
4240 }
4241 
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)4242 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4243 		       loff_t offset, u64 ino, unsigned int d_type)
4244 {
4245 	struct ksmbd_readdir_data	*buf;
4246 	struct smb2_query_dir_private	*priv;
4247 	struct ksmbd_dir_info		*d_info;
4248 	int				rc;
4249 
4250 	buf	= container_of(ctx, struct ksmbd_readdir_data, ctx);
4251 	priv	= buf->private;
4252 	d_info	= priv->d_info;
4253 
4254 	/* dot and dotdot entries are already reserved */
4255 	if (!strcmp(".", name) || !strcmp("..", name))
4256 		return true;
4257 	d_info->num_scan++;
4258 	if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4259 		return true;
4260 	if (!match_pattern(name, namlen, priv->search_pattern))
4261 		return true;
4262 
4263 	d_info->name		= name;
4264 	d_info->name_len	= namlen;
4265 	rc = reserve_populate_dentry(d_info, priv->info_level);
4266 	if (rc)
4267 		return false;
4268 	if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4269 		d_info->out_buf_len = 0;
4270 	return true;
4271 }
4272 
verify_info_level(int info_level)4273 static int verify_info_level(int info_level)
4274 {
4275 	switch (info_level) {
4276 	case FILE_FULL_DIRECTORY_INFORMATION:
4277 	case FILE_BOTH_DIRECTORY_INFORMATION:
4278 	case FILE_DIRECTORY_INFORMATION:
4279 	case FILE_NAMES_INFORMATION:
4280 	case FILEID_FULL_DIRECTORY_INFORMATION:
4281 	case FILEID_BOTH_DIRECTORY_INFORMATION:
4282 	case SMB_FIND_FILE_POSIX_INFO:
4283 		break;
4284 	default:
4285 		return -EOPNOTSUPP;
4286 	}
4287 
4288 	return 0;
4289 }
4290 
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4291 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4292 {
4293 	int free_len;
4294 
4295 	free_len = (int)(work->response_sz -
4296 		(get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4297 	return free_len;
4298 }
4299 
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4300 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4301 				     unsigned short hdr2_len,
4302 				     unsigned int out_buf_len)
4303 {
4304 	int free_len;
4305 
4306 	if (out_buf_len > work->conn->vals->max_trans_size)
4307 		return -EINVAL;
4308 
4309 	free_len = smb2_resp_buf_len(work, hdr2_len);
4310 	if (free_len < 0)
4311 		return -EINVAL;
4312 
4313 	return min_t(int, out_buf_len, free_len);
4314 }
4315 
smb2_query_dir(struct ksmbd_work * work)4316 int smb2_query_dir(struct ksmbd_work *work)
4317 {
4318 	struct ksmbd_conn *conn = work->conn;
4319 	struct smb2_query_directory_req *req;
4320 	struct smb2_query_directory_rsp *rsp;
4321 	struct ksmbd_share_config *share = work->tcon->share_conf;
4322 	struct ksmbd_file *dir_fp = NULL;
4323 	struct ksmbd_dir_info d_info;
4324 	int rc = 0;
4325 	char *srch_ptr = NULL;
4326 	unsigned char srch_flag;
4327 	int buffer_sz;
4328 	struct smb2_query_dir_private query_dir_private = {NULL, };
4329 
4330 	ksmbd_debug(SMB, "Received smb2 query directory request\n");
4331 
4332 	WORK_BUFFERS(work, req, rsp);
4333 
4334 	if (ksmbd_override_fsids(work)) {
4335 		rsp->hdr.Status = STATUS_NO_MEMORY;
4336 		smb2_set_err_rsp(work);
4337 		return -ENOMEM;
4338 	}
4339 
4340 	rc = verify_info_level(req->FileInformationClass);
4341 	if (rc) {
4342 		rc = -EFAULT;
4343 		goto err_out2;
4344 	}
4345 
4346 	dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4347 	if (!dir_fp) {
4348 		rc = -EBADF;
4349 		goto err_out2;
4350 	}
4351 
4352 	if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4353 	    inode_permission(file_mnt_idmap(dir_fp->filp),
4354 			     file_inode(dir_fp->filp),
4355 			     MAY_READ | MAY_EXEC)) {
4356 		pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4357 		rc = -EACCES;
4358 		goto err_out2;
4359 	}
4360 
4361 	if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4362 		pr_err("can't do query dir for a file\n");
4363 		rc = -EINVAL;
4364 		goto err_out2;
4365 	}
4366 
4367 	srch_flag = req->Flags;
4368 	srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4369 					  le16_to_cpu(req->FileNameLength), 1,
4370 					  conn->local_nls);
4371 	if (IS_ERR(srch_ptr)) {
4372 		ksmbd_debug(SMB, "Search Pattern not found\n");
4373 		rc = -EINVAL;
4374 		goto err_out2;
4375 	} else {
4376 		ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4377 	}
4378 
4379 	if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4380 		ksmbd_debug(SMB, "Restart directory scan\n");
4381 		generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4382 	}
4383 
4384 	memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4385 	d_info.wptr = (char *)rsp->Buffer;
4386 	d_info.rptr = (char *)rsp->Buffer;
4387 	d_info.out_buf_len =
4388 		smb2_calc_max_out_buf_len(work, 8,
4389 					  le32_to_cpu(req->OutputBufferLength));
4390 	if (d_info.out_buf_len < 0) {
4391 		rc = -EINVAL;
4392 		goto err_out;
4393 	}
4394 	d_info.flags = srch_flag;
4395 
4396 	/*
4397 	 * reserve dot and dotdot entries in head of buffer
4398 	 * in first response
4399 	 */
4400 	rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4401 					       dir_fp, &d_info, srch_ptr,
4402 					       smb2_populate_readdir_entry);
4403 	if (rc == -ENOSPC)
4404 		rc = 0;
4405 	else if (rc)
4406 		goto err_out;
4407 
4408 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4409 		d_info.hide_dot_file = true;
4410 
4411 	buffer_sz				= d_info.out_buf_len;
4412 	d_info.rptr				= d_info.wptr;
4413 	query_dir_private.work			= work;
4414 	query_dir_private.search_pattern	= srch_ptr;
4415 	query_dir_private.dir_fp		= dir_fp;
4416 	query_dir_private.d_info		= &d_info;
4417 	query_dir_private.info_level		= req->FileInformationClass;
4418 	dir_fp->readdir_data.private		= &query_dir_private;
4419 	set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4420 again:
4421 	d_info.num_scan = 0;
4422 	rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4423 	/*
4424 	 * num_entry can be 0 if the directory iteration stops before reaching
4425 	 * the end of the directory and no file is matched with the search
4426 	 * pattern.
4427 	 */
4428 	if (rc >= 0 && !d_info.num_entry && d_info.num_scan &&
4429 	    d_info.out_buf_len > 0)
4430 		goto again;
4431 	/*
4432 	 * req->OutputBufferLength is too small to contain even one entry.
4433 	 * In this case, it immediately returns OutputBufferLength 0 to client.
4434 	 */
4435 	if (!d_info.out_buf_len && !d_info.num_entry)
4436 		goto no_buf_len;
4437 	if (rc > 0 || rc == -ENOSPC)
4438 		rc = 0;
4439 	else if (rc)
4440 		goto err_out;
4441 
4442 	d_info.wptr = d_info.rptr;
4443 	d_info.out_buf_len = buffer_sz;
4444 	rc = process_query_dir_entries(&query_dir_private);
4445 	if (rc)
4446 		goto err_out;
4447 
4448 	if (!d_info.data_count && d_info.out_buf_len >= 0) {
4449 		if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4450 			rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4451 		} else {
4452 			dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4453 			rsp->hdr.Status = STATUS_NO_MORE_FILES;
4454 		}
4455 		rsp->StructureSize = cpu_to_le16(9);
4456 		rsp->OutputBufferOffset = cpu_to_le16(0);
4457 		rsp->OutputBufferLength = cpu_to_le32(0);
4458 		rsp->Buffer[0] = 0;
4459 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4460 				       offsetof(struct smb2_query_directory_rsp, Buffer)
4461 				       + 1);
4462 		if (rc)
4463 			goto err_out;
4464 	} else {
4465 no_buf_len:
4466 		((struct file_directory_info *)
4467 		((char *)rsp->Buffer + d_info.last_entry_offset))
4468 		->NextEntryOffset = 0;
4469 		if (d_info.data_count >= d_info.last_entry_off_align)
4470 			d_info.data_count -= d_info.last_entry_off_align;
4471 
4472 		rsp->StructureSize = cpu_to_le16(9);
4473 		rsp->OutputBufferOffset = cpu_to_le16(72);
4474 		rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4475 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4476 				       offsetof(struct smb2_query_directory_rsp, Buffer) +
4477 				       d_info.data_count);
4478 		if (rc)
4479 			goto err_out;
4480 	}
4481 
4482 	kfree(srch_ptr);
4483 	ksmbd_fd_put(work, dir_fp);
4484 	ksmbd_revert_fsids(work);
4485 	return 0;
4486 
4487 err_out:
4488 	pr_err("error while processing smb2 query dir rc = %d\n", rc);
4489 	kfree(srch_ptr);
4490 
4491 err_out2:
4492 	if (rc == -EINVAL)
4493 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4494 	else if (rc == -EACCES)
4495 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
4496 	else if (rc == -ENOENT)
4497 		rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4498 	else if (rc == -EBADF)
4499 		rsp->hdr.Status = STATUS_FILE_CLOSED;
4500 	else if (rc == -ENOMEM)
4501 		rsp->hdr.Status = STATUS_NO_MEMORY;
4502 	else if (rc == -EFAULT)
4503 		rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4504 	else if (rc == -EIO)
4505 		rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4506 	if (!rsp->hdr.Status)
4507 		rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4508 
4509 	smb2_set_err_rsp(work);
4510 	ksmbd_fd_put(work, dir_fp);
4511 	ksmbd_revert_fsids(work);
4512 	return 0;
4513 }
4514 
4515 /**
4516  * buffer_check_err() - helper function to check buffer errors
4517  * @reqOutputBufferLength:	max buffer length expected in command response
4518  * @rsp:		query info response buffer contains output buffer length
4519  * @rsp_org:		base response buffer pointer in case of chained response
4520  *
4521  * Return:	0 on success, otherwise error
4522  */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4523 static int buffer_check_err(int reqOutputBufferLength,
4524 			    struct smb2_query_info_rsp *rsp,
4525 			    void *rsp_org)
4526 {
4527 	if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4528 		pr_err("Invalid Buffer Size Requested\n");
4529 		rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4530 		*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4531 		return -EINVAL;
4532 	}
4533 	return 0;
4534 }
4535 
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4536 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4537 				   void *rsp_org)
4538 {
4539 	struct smb2_file_standard_info *sinfo;
4540 
4541 	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4542 
4543 	sinfo->AllocationSize = cpu_to_le64(4096);
4544 	sinfo->EndOfFile = cpu_to_le64(0);
4545 	sinfo->NumberOfLinks = cpu_to_le32(1);
4546 	sinfo->DeletePending = 1;
4547 	sinfo->Directory = 0;
4548 	rsp->OutputBufferLength =
4549 		cpu_to_le32(sizeof(struct smb2_file_standard_info));
4550 }
4551 
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4552 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4553 				   void *rsp_org)
4554 {
4555 	struct smb2_file_internal_info *file_info;
4556 
4557 	file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4558 
4559 	/* any unique number */
4560 	file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4561 	rsp->OutputBufferLength =
4562 		cpu_to_le32(sizeof(struct smb2_file_internal_info));
4563 }
4564 
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4565 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4566 				   struct smb2_query_info_req *req,
4567 				   struct smb2_query_info_rsp *rsp,
4568 				   void *rsp_org)
4569 {
4570 	u64 id;
4571 	int rc;
4572 
4573 	/*
4574 	 * Windows can sometime send query file info request on
4575 	 * pipe without opening it, checking error condition here
4576 	 */
4577 	id = req->VolatileFileId;
4578 	if (!ksmbd_session_rpc_method(sess, id))
4579 		return -ENOENT;
4580 
4581 	ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4582 		    req->FileInfoClass, req->VolatileFileId);
4583 
4584 	switch (req->FileInfoClass) {
4585 	case FILE_STANDARD_INFORMATION:
4586 		get_standard_info_pipe(rsp, rsp_org);
4587 		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4588 				      rsp, rsp_org);
4589 		break;
4590 	case FILE_INTERNAL_INFORMATION:
4591 		get_internal_info_pipe(rsp, id, rsp_org);
4592 		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4593 				      rsp, rsp_org);
4594 		break;
4595 	default:
4596 		ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4597 			    req->FileInfoClass);
4598 		rc = -EOPNOTSUPP;
4599 	}
4600 	return rc;
4601 }
4602 
4603 /**
4604  * smb2_get_ea() - handler for smb2 get extended attribute command
4605  * @work:	smb work containing query info command buffer
4606  * @fp:		ksmbd_file pointer
4607  * @req:	get extended attribute request
4608  * @rsp:	response buffer pointer
4609  * @rsp_org:	base response buffer pointer in case of chained response
4610  *
4611  * Return:	0 on success, otherwise error
4612  */
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)4613 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4614 		       struct smb2_query_info_req *req,
4615 		       struct smb2_query_info_rsp *rsp, void *rsp_org)
4616 {
4617 	struct smb2_ea_info *eainfo, *prev_eainfo;
4618 	char *name, *ptr, *xattr_list = NULL, *buf;
4619 	int rc, name_len, value_len, xattr_list_len, idx;
4620 	ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4621 	struct smb2_ea_info_req *ea_req = NULL;
4622 	const struct path *path;
4623 	struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4624 
4625 	if (!(fp->daccess & FILE_READ_EA_LE)) {
4626 		pr_err("Not permitted to read ext attr : 0x%x\n",
4627 		       fp->daccess);
4628 		return -EACCES;
4629 	}
4630 
4631 	path = &fp->filp->f_path;
4632 	/* single EA entry is requested with given user.* name */
4633 	if (req->InputBufferLength) {
4634 		if (le32_to_cpu(req->InputBufferLength) <=
4635 		    sizeof(struct smb2_ea_info_req))
4636 			return -EINVAL;
4637 
4638 		ea_req = (struct smb2_ea_info_req *)((char *)req +
4639 						     le16_to_cpu(req->InputBufferOffset));
4640 	} else {
4641 		/* need to send all EAs, if no specific EA is requested*/
4642 		if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4643 			ksmbd_debug(SMB,
4644 				    "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4645 				    le32_to_cpu(req->Flags));
4646 	}
4647 
4648 	buf_free_len =
4649 		smb2_calc_max_out_buf_len(work, 8,
4650 					  le32_to_cpu(req->OutputBufferLength));
4651 	if (buf_free_len < 0)
4652 		return -EINVAL;
4653 
4654 	rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4655 	if (rc < 0) {
4656 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
4657 		goto out;
4658 	} else if (!rc) { /* there is no EA in the file */
4659 		ksmbd_debug(SMB, "no ea data in the file\n");
4660 		goto done;
4661 	}
4662 	xattr_list_len = rc;
4663 
4664 	ptr = (char *)rsp->Buffer;
4665 	eainfo = (struct smb2_ea_info *)ptr;
4666 	prev_eainfo = eainfo;
4667 	idx = 0;
4668 
4669 	while (idx < xattr_list_len) {
4670 		name = xattr_list + idx;
4671 		name_len = strlen(name);
4672 
4673 		ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4674 		idx += name_len + 1;
4675 
4676 		/*
4677 		 * CIFS does not support EA other than user.* namespace,
4678 		 * still keep the framework generic, to list other attrs
4679 		 * in future.
4680 		 */
4681 		if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4682 			continue;
4683 
4684 		if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4685 			     STREAM_PREFIX_LEN))
4686 			continue;
4687 
4688 		if (req->InputBufferLength &&
4689 		    strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4690 			    ea_req->EaNameLength))
4691 			continue;
4692 
4693 		if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4694 			     DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4695 			continue;
4696 
4697 		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4698 			name_len -= XATTR_USER_PREFIX_LEN;
4699 
4700 		ptr = eainfo->name + name_len + 1;
4701 		buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4702 				name_len + 1);
4703 		/* bailout if xattr can't fit in buf_free_len */
4704 		value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4705 					       name, &buf);
4706 		if (value_len <= 0) {
4707 			rc = -ENOENT;
4708 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
4709 			goto out;
4710 		}
4711 
4712 		buf_free_len -= value_len;
4713 		if (buf_free_len < 0) {
4714 			kfree(buf);
4715 			break;
4716 		}
4717 
4718 		memcpy(ptr, buf, value_len);
4719 		kfree(buf);
4720 
4721 		ptr += value_len;
4722 		eainfo->Flags = 0;
4723 		eainfo->EaNameLength = name_len;
4724 
4725 		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4726 			memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4727 			       name_len);
4728 		else
4729 			memcpy(eainfo->name, name, name_len);
4730 
4731 		eainfo->name[name_len] = '\0';
4732 		eainfo->EaValueLength = cpu_to_le16(value_len);
4733 		next_offset = offsetof(struct smb2_ea_info, name) +
4734 			name_len + 1 + value_len;
4735 
4736 		/* align next xattr entry at 4 byte bundary */
4737 		alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4738 		if (alignment_bytes) {
4739 			memset(ptr, '\0', alignment_bytes);
4740 			ptr += alignment_bytes;
4741 			next_offset += alignment_bytes;
4742 			buf_free_len -= alignment_bytes;
4743 		}
4744 		eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4745 		prev_eainfo = eainfo;
4746 		eainfo = (struct smb2_ea_info *)ptr;
4747 		rsp_data_cnt += next_offset;
4748 
4749 		if (req->InputBufferLength) {
4750 			ksmbd_debug(SMB, "single entry requested\n");
4751 			break;
4752 		}
4753 	}
4754 
4755 	/* no more ea entries */
4756 	prev_eainfo->NextEntryOffset = 0;
4757 done:
4758 	rc = 0;
4759 	if (rsp_data_cnt == 0)
4760 		rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4761 	rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4762 out:
4763 	kvfree(xattr_list);
4764 	return rc;
4765 }
4766 
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4767 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4768 				 struct ksmbd_file *fp, void *rsp_org)
4769 {
4770 	struct smb2_file_access_info *file_info;
4771 
4772 	file_info = (struct smb2_file_access_info *)rsp->Buffer;
4773 	file_info->AccessFlags = fp->daccess;
4774 	rsp->OutputBufferLength =
4775 		cpu_to_le32(sizeof(struct smb2_file_access_info));
4776 }
4777 
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4778 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4779 			       struct ksmbd_file *fp, void *rsp_org)
4780 {
4781 	struct smb2_file_basic_info *basic_info;
4782 	struct kstat stat;
4783 	u64 time;
4784 	int ret;
4785 
4786 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4787 		pr_err("no right to read the attributes : 0x%x\n",
4788 		       fp->daccess);
4789 		return -EACCES;
4790 	}
4791 
4792 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4793 			  AT_STATX_SYNC_AS_STAT);
4794 	if (ret)
4795 		return ret;
4796 
4797 	basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4798 	basic_info->CreationTime = cpu_to_le64(fp->create_time);
4799 	time = ksmbd_UnixTimeToNT(stat.atime);
4800 	basic_info->LastAccessTime = cpu_to_le64(time);
4801 	time = ksmbd_UnixTimeToNT(stat.mtime);
4802 	basic_info->LastWriteTime = cpu_to_le64(time);
4803 	time = ksmbd_UnixTimeToNT(stat.ctime);
4804 	basic_info->ChangeTime = cpu_to_le64(time);
4805 	basic_info->Attributes = fp->f_ci->m_fattr;
4806 	basic_info->Pad1 = 0;
4807 	rsp->OutputBufferLength =
4808 		cpu_to_le32(sizeof(struct smb2_file_basic_info));
4809 	return 0;
4810 }
4811 
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4812 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4813 				  struct ksmbd_file *fp, void *rsp_org)
4814 {
4815 	struct smb2_file_standard_info *sinfo;
4816 	unsigned int delete_pending;
4817 	struct kstat stat;
4818 	int ret;
4819 
4820 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4821 			  AT_STATX_SYNC_AS_STAT);
4822 	if (ret)
4823 		return ret;
4824 
4825 	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4826 	delete_pending = ksmbd_inode_pending_delete(fp);
4827 
4828 	sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4829 	sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4830 	sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4831 	sinfo->DeletePending = delete_pending;
4832 	sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4833 	rsp->OutputBufferLength =
4834 		cpu_to_le32(sizeof(struct smb2_file_standard_info));
4835 
4836 	return 0;
4837 }
4838 
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4839 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4840 				    void *rsp_org)
4841 {
4842 	struct smb2_file_alignment_info *file_info;
4843 
4844 	file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4845 	file_info->AlignmentRequirement = 0;
4846 	rsp->OutputBufferLength =
4847 		cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4848 }
4849 
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4850 static int get_file_all_info(struct ksmbd_work *work,
4851 			     struct smb2_query_info_rsp *rsp,
4852 			     struct ksmbd_file *fp,
4853 			     void *rsp_org)
4854 {
4855 	struct ksmbd_conn *conn = work->conn;
4856 	struct smb2_file_all_info *file_info;
4857 	unsigned int delete_pending;
4858 	struct kstat stat;
4859 	int conv_len;
4860 	char *filename;
4861 	u64 time;
4862 	int ret;
4863 
4864 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4865 		ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4866 			    fp->daccess);
4867 		return -EACCES;
4868 	}
4869 
4870 	filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4871 	if (IS_ERR(filename))
4872 		return PTR_ERR(filename);
4873 
4874 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4875 			  AT_STATX_SYNC_AS_STAT);
4876 	if (ret)
4877 		return ret;
4878 
4879 	ksmbd_debug(SMB, "filename = %s\n", filename);
4880 	delete_pending = ksmbd_inode_pending_delete(fp);
4881 	file_info = (struct smb2_file_all_info *)rsp->Buffer;
4882 
4883 	file_info->CreationTime = cpu_to_le64(fp->create_time);
4884 	time = ksmbd_UnixTimeToNT(stat.atime);
4885 	file_info->LastAccessTime = cpu_to_le64(time);
4886 	time = ksmbd_UnixTimeToNT(stat.mtime);
4887 	file_info->LastWriteTime = cpu_to_le64(time);
4888 	time = ksmbd_UnixTimeToNT(stat.ctime);
4889 	file_info->ChangeTime = cpu_to_le64(time);
4890 	file_info->Attributes = fp->f_ci->m_fattr;
4891 	file_info->Pad1 = 0;
4892 	file_info->AllocationSize =
4893 		cpu_to_le64(stat.blocks << 9);
4894 	file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4895 	file_info->NumberOfLinks =
4896 			cpu_to_le32(get_nlink(&stat) - delete_pending);
4897 	file_info->DeletePending = delete_pending;
4898 	file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4899 	file_info->Pad2 = 0;
4900 	file_info->IndexNumber = cpu_to_le64(stat.ino);
4901 	file_info->EASize = 0;
4902 	file_info->AccessFlags = fp->daccess;
4903 	file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4904 	file_info->Mode = fp->coption;
4905 	file_info->AlignmentRequirement = 0;
4906 	conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4907 				     PATH_MAX, conn->local_nls, 0);
4908 	conv_len *= 2;
4909 	file_info->FileNameLength = cpu_to_le32(conv_len);
4910 	rsp->OutputBufferLength =
4911 		cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4912 	kfree(filename);
4913 	return 0;
4914 }
4915 
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4916 static void get_file_alternate_info(struct ksmbd_work *work,
4917 				    struct smb2_query_info_rsp *rsp,
4918 				    struct ksmbd_file *fp,
4919 				    void *rsp_org)
4920 {
4921 	struct ksmbd_conn *conn = work->conn;
4922 	struct smb2_file_alt_name_info *file_info;
4923 	struct dentry *dentry = fp->filp->f_path.dentry;
4924 	int conv_len;
4925 
4926 	spin_lock(&dentry->d_lock);
4927 	file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4928 	conv_len = ksmbd_extract_shortname(conn,
4929 					   dentry->d_name.name,
4930 					   file_info->FileName);
4931 	spin_unlock(&dentry->d_lock);
4932 	file_info->FileNameLength = cpu_to_le32(conv_len);
4933 	rsp->OutputBufferLength =
4934 		cpu_to_le32(struct_size(file_info, FileName, conv_len));
4935 }
4936 
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4937 static int get_file_stream_info(struct ksmbd_work *work,
4938 				struct smb2_query_info_rsp *rsp,
4939 				struct ksmbd_file *fp,
4940 				void *rsp_org)
4941 {
4942 	struct ksmbd_conn *conn = work->conn;
4943 	struct smb2_file_stream_info *file_info;
4944 	char *stream_name, *xattr_list = NULL, *stream_buf;
4945 	struct kstat stat;
4946 	const struct path *path = &fp->filp->f_path;
4947 	ssize_t xattr_list_len;
4948 	int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4949 	int buf_free_len;
4950 	struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4951 	int ret;
4952 
4953 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4954 			  AT_STATX_SYNC_AS_STAT);
4955 	if (ret)
4956 		return ret;
4957 
4958 	file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4959 
4960 	buf_free_len =
4961 		smb2_calc_max_out_buf_len(work, 8,
4962 					  le32_to_cpu(req->OutputBufferLength));
4963 	if (buf_free_len < 0)
4964 		goto out;
4965 
4966 	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4967 	if (xattr_list_len < 0) {
4968 		goto out;
4969 	} else if (!xattr_list_len) {
4970 		ksmbd_debug(SMB, "empty xattr in the file\n");
4971 		goto out;
4972 	}
4973 
4974 	while (idx < xattr_list_len) {
4975 		stream_name = xattr_list + idx;
4976 		streamlen = strlen(stream_name);
4977 		idx += streamlen + 1;
4978 
4979 		ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4980 
4981 		if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4982 			    STREAM_PREFIX, STREAM_PREFIX_LEN))
4983 			continue;
4984 
4985 		stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4986 				STREAM_PREFIX_LEN);
4987 		streamlen = stream_name_len;
4988 
4989 		/* plus : size */
4990 		streamlen += 1;
4991 		stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP);
4992 		if (!stream_buf)
4993 			break;
4994 
4995 		streamlen = snprintf(stream_buf, streamlen + 1,
4996 				     ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4997 
4998 		next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4999 		if (next > buf_free_len) {
5000 			kfree(stream_buf);
5001 			break;
5002 		}
5003 
5004 		file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
5005 		streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
5006 					       stream_buf, streamlen,
5007 					       conn->local_nls, 0);
5008 		streamlen *= 2;
5009 		kfree(stream_buf);
5010 		file_info->StreamNameLength = cpu_to_le32(streamlen);
5011 		file_info->StreamSize = cpu_to_le64(stream_name_len);
5012 		file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
5013 
5014 		nbytes += next;
5015 		buf_free_len -= next;
5016 		file_info->NextEntryOffset = cpu_to_le32(next);
5017 	}
5018 
5019 out:
5020 	if (!S_ISDIR(stat.mode) &&
5021 	    buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
5022 		file_info = (struct smb2_file_stream_info *)
5023 			&rsp->Buffer[nbytes];
5024 		streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
5025 					      "::$DATA", 7, conn->local_nls, 0);
5026 		streamlen *= 2;
5027 		file_info->StreamNameLength = cpu_to_le32(streamlen);
5028 		file_info->StreamSize = cpu_to_le64(stat.size);
5029 		file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
5030 		nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
5031 	}
5032 
5033 	/* last entry offset should be 0 */
5034 	file_info->NextEntryOffset = 0;
5035 	kvfree(xattr_list);
5036 
5037 	rsp->OutputBufferLength = cpu_to_le32(nbytes);
5038 
5039 	return 0;
5040 }
5041 
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5042 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
5043 				  struct ksmbd_file *fp, void *rsp_org)
5044 {
5045 	struct smb2_file_internal_info *file_info;
5046 	struct kstat stat;
5047 	int ret;
5048 
5049 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5050 			  AT_STATX_SYNC_AS_STAT);
5051 	if (ret)
5052 		return ret;
5053 
5054 	file_info = (struct smb2_file_internal_info *)rsp->Buffer;
5055 	file_info->IndexNumber = cpu_to_le64(stat.ino);
5056 	rsp->OutputBufferLength =
5057 		cpu_to_le32(sizeof(struct smb2_file_internal_info));
5058 
5059 	return 0;
5060 }
5061 
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5062 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5063 				      struct ksmbd_file *fp, void *rsp_org)
5064 {
5065 	struct smb2_file_ntwrk_info *file_info;
5066 	struct kstat stat;
5067 	u64 time;
5068 	int ret;
5069 
5070 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5071 		pr_err("no right to read the attributes : 0x%x\n",
5072 		       fp->daccess);
5073 		return -EACCES;
5074 	}
5075 
5076 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5077 			  AT_STATX_SYNC_AS_STAT);
5078 	if (ret)
5079 		return ret;
5080 
5081 	file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5082 
5083 	file_info->CreationTime = cpu_to_le64(fp->create_time);
5084 	time = ksmbd_UnixTimeToNT(stat.atime);
5085 	file_info->LastAccessTime = cpu_to_le64(time);
5086 	time = ksmbd_UnixTimeToNT(stat.mtime);
5087 	file_info->LastWriteTime = cpu_to_le64(time);
5088 	time = ksmbd_UnixTimeToNT(stat.ctime);
5089 	file_info->ChangeTime = cpu_to_le64(time);
5090 	file_info->Attributes = fp->f_ci->m_fattr;
5091 	file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5092 	file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5093 	file_info->Reserved = cpu_to_le32(0);
5094 	rsp->OutputBufferLength =
5095 		cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5096 	return 0;
5097 }
5098 
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)5099 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5100 {
5101 	struct smb2_file_ea_info *file_info;
5102 
5103 	file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5104 	file_info->EASize = 0;
5105 	rsp->OutputBufferLength =
5106 		cpu_to_le32(sizeof(struct smb2_file_ea_info));
5107 }
5108 
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5109 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5110 				   struct ksmbd_file *fp, void *rsp_org)
5111 {
5112 	struct smb2_file_pos_info *file_info;
5113 
5114 	file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5115 	file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5116 	rsp->OutputBufferLength =
5117 		cpu_to_le32(sizeof(struct smb2_file_pos_info));
5118 }
5119 
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5120 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5121 			       struct ksmbd_file *fp, void *rsp_org)
5122 {
5123 	struct smb2_file_mode_info *file_info;
5124 
5125 	file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5126 	file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5127 	rsp->OutputBufferLength =
5128 		cpu_to_le32(sizeof(struct smb2_file_mode_info));
5129 }
5130 
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5131 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5132 				     struct ksmbd_file *fp, void *rsp_org)
5133 {
5134 	struct smb2_file_comp_info *file_info;
5135 	struct kstat stat;
5136 	int ret;
5137 
5138 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5139 			  AT_STATX_SYNC_AS_STAT);
5140 	if (ret)
5141 		return ret;
5142 
5143 	file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5144 	file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5145 	file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5146 	file_info->CompressionUnitShift = 0;
5147 	file_info->ChunkShift = 0;
5148 	file_info->ClusterShift = 0;
5149 	memset(&file_info->Reserved[0], 0, 3);
5150 
5151 	rsp->OutputBufferLength =
5152 		cpu_to_le32(sizeof(struct smb2_file_comp_info));
5153 
5154 	return 0;
5155 }
5156 
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5157 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5158 				       struct ksmbd_file *fp, void *rsp_org)
5159 {
5160 	struct smb2_file_attr_tag_info *file_info;
5161 
5162 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5163 		pr_err("no right to read the attributes : 0x%x\n",
5164 		       fp->daccess);
5165 		return -EACCES;
5166 	}
5167 
5168 	file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5169 	file_info->FileAttributes = fp->f_ci->m_fattr;
5170 	file_info->ReparseTag = 0;
5171 	rsp->OutputBufferLength =
5172 		cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5173 	return 0;
5174 }
5175 
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5176 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5177 				struct ksmbd_file *fp, void *rsp_org)
5178 {
5179 	struct smb311_posix_qinfo *file_info;
5180 	struct inode *inode = file_inode(fp->filp);
5181 	struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5182 	vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5183 	vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5184 	struct kstat stat;
5185 	u64 time;
5186 	int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5187 	int ret;
5188 
5189 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5190 			  AT_STATX_SYNC_AS_STAT);
5191 	if (ret)
5192 		return ret;
5193 
5194 	file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5195 	file_info->CreationTime = cpu_to_le64(fp->create_time);
5196 	time = ksmbd_UnixTimeToNT(stat.atime);
5197 	file_info->LastAccessTime = cpu_to_le64(time);
5198 	time = ksmbd_UnixTimeToNT(stat.mtime);
5199 	file_info->LastWriteTime = cpu_to_le64(time);
5200 	time = ksmbd_UnixTimeToNT(stat.ctime);
5201 	file_info->ChangeTime = cpu_to_le64(time);
5202 	file_info->DosAttributes = fp->f_ci->m_fattr;
5203 	file_info->Inode = cpu_to_le64(stat.ino);
5204 	file_info->EndOfFile = cpu_to_le64(stat.size);
5205 	file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5206 	file_info->HardLinks = cpu_to_le32(stat.nlink);
5207 	file_info->Mode = cpu_to_le32(stat.mode & 0777);
5208 	switch (stat.mode & S_IFMT) {
5209 	case S_IFDIR:
5210 		file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT);
5211 		break;
5212 	case S_IFLNK:
5213 		file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT);
5214 		break;
5215 	case S_IFCHR:
5216 		file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT);
5217 		break;
5218 	case S_IFBLK:
5219 		file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT);
5220 		break;
5221 	case S_IFIFO:
5222 		file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT);
5223 		break;
5224 	case S_IFSOCK:
5225 		file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT);
5226 	}
5227 
5228 	file_info->DeviceId = cpu_to_le32(stat.rdev);
5229 
5230 	/*
5231 	 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5232 	 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5233 	 *		  sub_auth(4 * 1(num_subauth)) + RID(4).
5234 	 */
5235 	id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5236 		  SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5237 	id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5238 		  SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5239 
5240 	rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5241 
5242 	return 0;
5243 }
5244 
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5245 static int smb2_get_info_file(struct ksmbd_work *work,
5246 			      struct smb2_query_info_req *req,
5247 			      struct smb2_query_info_rsp *rsp)
5248 {
5249 	struct ksmbd_file *fp;
5250 	int fileinfoclass = 0;
5251 	int rc = 0;
5252 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5253 
5254 	if (test_share_config_flag(work->tcon->share_conf,
5255 				   KSMBD_SHARE_FLAG_PIPE)) {
5256 		/* smb2 info file called for pipe */
5257 		return smb2_get_info_file_pipe(work->sess, req, rsp,
5258 					       work->response_buf);
5259 	}
5260 
5261 	if (work->next_smb2_rcv_hdr_off) {
5262 		if (!has_file_id(req->VolatileFileId)) {
5263 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5264 				    work->compound_fid);
5265 			id = work->compound_fid;
5266 			pid = work->compound_pfid;
5267 		}
5268 	}
5269 
5270 	if (!has_file_id(id)) {
5271 		id = req->VolatileFileId;
5272 		pid = req->PersistentFileId;
5273 	}
5274 
5275 	fp = ksmbd_lookup_fd_slow(work, id, pid);
5276 	if (!fp)
5277 		return -ENOENT;
5278 
5279 	fileinfoclass = req->FileInfoClass;
5280 
5281 	switch (fileinfoclass) {
5282 	case FILE_ACCESS_INFORMATION:
5283 		get_file_access_info(rsp, fp, work->response_buf);
5284 		break;
5285 
5286 	case FILE_BASIC_INFORMATION:
5287 		rc = get_file_basic_info(rsp, fp, work->response_buf);
5288 		break;
5289 
5290 	case FILE_STANDARD_INFORMATION:
5291 		rc = get_file_standard_info(rsp, fp, work->response_buf);
5292 		break;
5293 
5294 	case FILE_ALIGNMENT_INFORMATION:
5295 		get_file_alignment_info(rsp, work->response_buf);
5296 		break;
5297 
5298 	case FILE_ALL_INFORMATION:
5299 		rc = get_file_all_info(work, rsp, fp, work->response_buf);
5300 		break;
5301 
5302 	case FILE_ALTERNATE_NAME_INFORMATION:
5303 		get_file_alternate_info(work, rsp, fp, work->response_buf);
5304 		break;
5305 
5306 	case FILE_STREAM_INFORMATION:
5307 		rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5308 		break;
5309 
5310 	case FILE_INTERNAL_INFORMATION:
5311 		rc = get_file_internal_info(rsp, fp, work->response_buf);
5312 		break;
5313 
5314 	case FILE_NETWORK_OPEN_INFORMATION:
5315 		rc = get_file_network_open_info(rsp, fp, work->response_buf);
5316 		break;
5317 
5318 	case FILE_EA_INFORMATION:
5319 		get_file_ea_info(rsp, work->response_buf);
5320 		break;
5321 
5322 	case FILE_FULL_EA_INFORMATION:
5323 		rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5324 		break;
5325 
5326 	case FILE_POSITION_INFORMATION:
5327 		get_file_position_info(rsp, fp, work->response_buf);
5328 		break;
5329 
5330 	case FILE_MODE_INFORMATION:
5331 		get_file_mode_info(rsp, fp, work->response_buf);
5332 		break;
5333 
5334 	case FILE_COMPRESSION_INFORMATION:
5335 		rc = get_file_compression_info(rsp, fp, work->response_buf);
5336 		break;
5337 
5338 	case FILE_ATTRIBUTE_TAG_INFORMATION:
5339 		rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5340 		break;
5341 	case SMB_FIND_FILE_POSIX_INFO:
5342 		if (!work->tcon->posix_extensions) {
5343 			pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5344 			rc = -EOPNOTSUPP;
5345 		} else {
5346 			rc = find_file_posix_info(rsp, fp, work->response_buf);
5347 		}
5348 		break;
5349 	default:
5350 		ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5351 			    fileinfoclass);
5352 		rc = -EOPNOTSUPP;
5353 	}
5354 	if (!rc)
5355 		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5356 				      rsp, work->response_buf);
5357 	ksmbd_fd_put(work, fp);
5358 	return rc;
5359 }
5360 
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5361 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5362 				    struct smb2_query_info_req *req,
5363 				    struct smb2_query_info_rsp *rsp)
5364 {
5365 	struct ksmbd_session *sess = work->sess;
5366 	struct ksmbd_conn *conn = work->conn;
5367 	struct ksmbd_share_config *share = work->tcon->share_conf;
5368 	int fsinfoclass = 0;
5369 	struct kstatfs stfs;
5370 	struct path path;
5371 	int rc = 0, len;
5372 
5373 	if (!share->path)
5374 		return -EIO;
5375 
5376 	rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5377 	if (rc) {
5378 		pr_err("cannot create vfs path\n");
5379 		return -EIO;
5380 	}
5381 
5382 	rc = vfs_statfs(&path, &stfs);
5383 	if (rc) {
5384 		pr_err("cannot do stat of path %s\n", share->path);
5385 		path_put(&path);
5386 		return -EIO;
5387 	}
5388 
5389 	fsinfoclass = req->FileInfoClass;
5390 
5391 	switch (fsinfoclass) {
5392 	case FS_DEVICE_INFORMATION:
5393 	{
5394 		struct filesystem_device_info *info;
5395 
5396 		info = (struct filesystem_device_info *)rsp->Buffer;
5397 
5398 		info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);
5399 		info->DeviceCharacteristics =
5400 			cpu_to_le32(FILE_DEVICE_IS_MOUNTED);
5401 		if (!test_tree_conn_flag(work->tcon,
5402 					 KSMBD_TREE_CONN_FLAG_WRITABLE))
5403 			info->DeviceCharacteristics |=
5404 				cpu_to_le32(FILE_READ_ONLY_DEVICE);
5405 		rsp->OutputBufferLength = cpu_to_le32(8);
5406 		break;
5407 	}
5408 	case FS_ATTRIBUTE_INFORMATION:
5409 	{
5410 		struct filesystem_attribute_info *info;
5411 		size_t sz;
5412 
5413 		info = (struct filesystem_attribute_info *)rsp->Buffer;
5414 		info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5415 					       FILE_PERSISTENT_ACLS |
5416 					       FILE_UNICODE_ON_DISK |
5417 					       FILE_CASE_PRESERVED_NAMES |
5418 					       FILE_CASE_SENSITIVE_SEARCH |
5419 					       FILE_SUPPORTS_BLOCK_REFCOUNTING);
5420 
5421 		info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5422 
5423 		if (test_share_config_flag(work->tcon->share_conf,
5424 		    KSMBD_SHARE_FLAG_STREAMS))
5425 			info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5426 
5427 		info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5428 		len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5429 					"NTFS", PATH_MAX, conn->local_nls, 0);
5430 		len = len * 2;
5431 		info->FileSystemNameLen = cpu_to_le32(len);
5432 		sz = sizeof(struct filesystem_attribute_info) + len;
5433 		rsp->OutputBufferLength = cpu_to_le32(sz);
5434 		break;
5435 	}
5436 	case FS_VOLUME_INFORMATION:
5437 	{
5438 		struct filesystem_vol_info *info;
5439 		size_t sz;
5440 		unsigned int serial_crc = 0;
5441 
5442 		info = (struct filesystem_vol_info *)(rsp->Buffer);
5443 		info->VolumeCreationTime = 0;
5444 		serial_crc = crc32_le(serial_crc, share->name,
5445 				      strlen(share->name));
5446 		serial_crc = crc32_le(serial_crc, share->path,
5447 				      strlen(share->path));
5448 		serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5449 				      strlen(ksmbd_netbios_name()));
5450 		/* Taking dummy value of serial number*/
5451 		info->SerialNumber = cpu_to_le32(serial_crc);
5452 		len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5453 					share->name, PATH_MAX,
5454 					conn->local_nls, 0);
5455 		len = len * 2;
5456 		info->VolumeLabelSize = cpu_to_le32(len);
5457 		info->Reserved = 0;
5458 		sz = sizeof(struct filesystem_vol_info) + len;
5459 		rsp->OutputBufferLength = cpu_to_le32(sz);
5460 		break;
5461 	}
5462 	case FS_SIZE_INFORMATION:
5463 	{
5464 		struct filesystem_info *info;
5465 
5466 		info = (struct filesystem_info *)(rsp->Buffer);
5467 		info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5468 		info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5469 		info->SectorsPerAllocationUnit = cpu_to_le32(1);
5470 		info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5471 		rsp->OutputBufferLength = cpu_to_le32(24);
5472 		break;
5473 	}
5474 	case FS_FULL_SIZE_INFORMATION:
5475 	{
5476 		struct smb2_fs_full_size_info *info;
5477 
5478 		info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5479 		info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5480 		info->CallerAvailableAllocationUnits =
5481 					cpu_to_le64(stfs.f_bavail);
5482 		info->ActualAvailableAllocationUnits =
5483 					cpu_to_le64(stfs.f_bfree);
5484 		info->SectorsPerAllocationUnit = cpu_to_le32(1);
5485 		info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5486 		rsp->OutputBufferLength = cpu_to_le32(32);
5487 		break;
5488 	}
5489 	case FS_OBJECT_ID_INFORMATION:
5490 	{
5491 		struct object_id_info *info;
5492 
5493 		info = (struct object_id_info *)(rsp->Buffer);
5494 
5495 		if (!user_guest(sess->user))
5496 			memcpy(info->objid, user_passkey(sess->user), 16);
5497 		else
5498 			memset(info->objid, 0, 16);
5499 
5500 		info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5501 		info->extended_info.version = cpu_to_le32(1);
5502 		info->extended_info.release = cpu_to_le32(1);
5503 		info->extended_info.rel_date = 0;
5504 		memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5505 		rsp->OutputBufferLength = cpu_to_le32(64);
5506 		break;
5507 	}
5508 	case FS_SECTOR_SIZE_INFORMATION:
5509 	{
5510 		struct smb3_fs_ss_info *info;
5511 		unsigned int sector_size =
5512 			min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5513 
5514 		info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5515 
5516 		info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5517 		info->PhysicalBytesPerSectorForAtomicity =
5518 				cpu_to_le32(sector_size);
5519 		info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5520 		info->FSEffPhysicalBytesPerSectorForAtomicity =
5521 				cpu_to_le32(sector_size);
5522 		info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5523 				    SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5524 		info->ByteOffsetForSectorAlignment = 0;
5525 		info->ByteOffsetForPartitionAlignment = 0;
5526 		rsp->OutputBufferLength = cpu_to_le32(28);
5527 		break;
5528 	}
5529 	case FS_CONTROL_INFORMATION:
5530 	{
5531 		/*
5532 		 * TODO : The current implementation is based on
5533 		 * test result with win7(NTFS) server. It's need to
5534 		 * modify this to get valid Quota values
5535 		 * from Linux kernel
5536 		 */
5537 		struct smb2_fs_control_info *info;
5538 
5539 		info = (struct smb2_fs_control_info *)(rsp->Buffer);
5540 		info->FreeSpaceStartFiltering = 0;
5541 		info->FreeSpaceThreshold = 0;
5542 		info->FreeSpaceStopFiltering = 0;
5543 		info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5544 		info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5545 		info->Padding = 0;
5546 		rsp->OutputBufferLength = cpu_to_le32(48);
5547 		break;
5548 	}
5549 	case FS_POSIX_INFORMATION:
5550 	{
5551 		struct filesystem_posix_info *info;
5552 
5553 		if (!work->tcon->posix_extensions) {
5554 			pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5555 			rc = -EOPNOTSUPP;
5556 		} else {
5557 			info = (struct filesystem_posix_info *)(rsp->Buffer);
5558 			info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5559 			info->BlockSize = cpu_to_le32(stfs.f_bsize);
5560 			info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5561 			info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5562 			info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5563 			info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5564 			info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5565 			rsp->OutputBufferLength = cpu_to_le32(56);
5566 		}
5567 		break;
5568 	}
5569 	default:
5570 		path_put(&path);
5571 		return -EOPNOTSUPP;
5572 	}
5573 	rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5574 			      rsp, work->response_buf);
5575 	path_put(&path);
5576 	return rc;
5577 }
5578 
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5579 static int smb2_get_info_sec(struct ksmbd_work *work,
5580 			     struct smb2_query_info_req *req,
5581 			     struct smb2_query_info_rsp *rsp)
5582 {
5583 	struct ksmbd_file *fp;
5584 	struct mnt_idmap *idmap;
5585 	struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5586 	struct smb_fattr fattr = {{0}};
5587 	struct inode *inode;
5588 	__u32 secdesclen = 0;
5589 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5590 	int addition_info = le32_to_cpu(req->AdditionalInformation);
5591 	int rc = 0, ppntsd_size = 0;
5592 
5593 	if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5594 			      PROTECTED_DACL_SECINFO |
5595 			      UNPROTECTED_DACL_SECINFO)) {
5596 		ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5597 		       addition_info);
5598 
5599 		pntsd->revision = cpu_to_le16(1);
5600 		pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5601 		pntsd->osidoffset = 0;
5602 		pntsd->gsidoffset = 0;
5603 		pntsd->sacloffset = 0;
5604 		pntsd->dacloffset = 0;
5605 
5606 		secdesclen = sizeof(struct smb_ntsd);
5607 		rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5608 
5609 		return 0;
5610 	}
5611 
5612 	if (work->next_smb2_rcv_hdr_off) {
5613 		if (!has_file_id(req->VolatileFileId)) {
5614 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5615 				    work->compound_fid);
5616 			id = work->compound_fid;
5617 			pid = work->compound_pfid;
5618 		}
5619 	}
5620 
5621 	if (!has_file_id(id)) {
5622 		id = req->VolatileFileId;
5623 		pid = req->PersistentFileId;
5624 	}
5625 
5626 	fp = ksmbd_lookup_fd_slow(work, id, pid);
5627 	if (!fp)
5628 		return -ENOENT;
5629 
5630 	idmap = file_mnt_idmap(fp->filp);
5631 	inode = file_inode(fp->filp);
5632 	ksmbd_acls_fattr(&fattr, idmap, inode);
5633 
5634 	if (test_share_config_flag(work->tcon->share_conf,
5635 				   KSMBD_SHARE_FLAG_ACL_XATTR))
5636 		ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5637 						     fp->filp->f_path.dentry,
5638 						     &ppntsd);
5639 
5640 	/* Check if sd buffer size exceeds response buffer size */
5641 	if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5642 		rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5643 				    addition_info, &secdesclen, &fattr);
5644 	posix_acl_release(fattr.cf_acls);
5645 	posix_acl_release(fattr.cf_dacls);
5646 	kfree(ppntsd);
5647 	ksmbd_fd_put(work, fp);
5648 	if (rc)
5649 		return rc;
5650 
5651 	rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5652 	return 0;
5653 }
5654 
5655 /**
5656  * smb2_query_info() - handler for smb2 query info command
5657  * @work:	smb work containing query info request buffer
5658  *
5659  * Return:	0 on success, otherwise error
5660  */
smb2_query_info(struct ksmbd_work * work)5661 int smb2_query_info(struct ksmbd_work *work)
5662 {
5663 	struct smb2_query_info_req *req;
5664 	struct smb2_query_info_rsp *rsp;
5665 	int rc = 0;
5666 
5667 	ksmbd_debug(SMB, "Received request smb2 query info request\n");
5668 
5669 	WORK_BUFFERS(work, req, rsp);
5670 
5671 	if (ksmbd_override_fsids(work)) {
5672 		rc = -ENOMEM;
5673 		goto err_out;
5674 	}
5675 
5676 	switch (req->InfoType) {
5677 	case SMB2_O_INFO_FILE:
5678 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5679 		rc = smb2_get_info_file(work, req, rsp);
5680 		break;
5681 	case SMB2_O_INFO_FILESYSTEM:
5682 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5683 		rc = smb2_get_info_filesystem(work, req, rsp);
5684 		break;
5685 	case SMB2_O_INFO_SECURITY:
5686 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5687 		rc = smb2_get_info_sec(work, req, rsp);
5688 		break;
5689 	default:
5690 		ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5691 			    req->InfoType);
5692 		rc = -EOPNOTSUPP;
5693 	}
5694 	ksmbd_revert_fsids(work);
5695 
5696 	if (!rc) {
5697 		rsp->StructureSize = cpu_to_le16(9);
5698 		rsp->OutputBufferOffset = cpu_to_le16(72);
5699 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5700 				       offsetof(struct smb2_query_info_rsp, Buffer) +
5701 					le32_to_cpu(rsp->OutputBufferLength));
5702 	}
5703 
5704 err_out:
5705 	if (rc < 0) {
5706 		if (rc == -EACCES)
5707 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
5708 		else if (rc == -ENOENT)
5709 			rsp->hdr.Status = STATUS_FILE_CLOSED;
5710 		else if (rc == -EIO)
5711 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5712 		else if (rc == -ENOMEM)
5713 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5714 		else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5715 			rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5716 		smb2_set_err_rsp(work);
5717 
5718 		ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5719 			    rc);
5720 		return rc;
5721 	}
5722 	return 0;
5723 }
5724 
5725 /**
5726  * smb2_close_pipe() - handler for closing IPC pipe
5727  * @work:	smb work containing close request buffer
5728  *
5729  * Return:	0
5730  */
smb2_close_pipe(struct ksmbd_work * work)5731 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5732 {
5733 	u64 id;
5734 	struct smb2_close_req *req;
5735 	struct smb2_close_rsp *rsp;
5736 
5737 	WORK_BUFFERS(work, req, rsp);
5738 
5739 	id = req->VolatileFileId;
5740 	ksmbd_session_rpc_close(work->sess, id);
5741 
5742 	rsp->StructureSize = cpu_to_le16(60);
5743 	rsp->Flags = 0;
5744 	rsp->Reserved = 0;
5745 	rsp->CreationTime = 0;
5746 	rsp->LastAccessTime = 0;
5747 	rsp->LastWriteTime = 0;
5748 	rsp->ChangeTime = 0;
5749 	rsp->AllocationSize = 0;
5750 	rsp->EndOfFile = 0;
5751 	rsp->Attributes = 0;
5752 
5753 	return ksmbd_iov_pin_rsp(work, (void *)rsp,
5754 				 sizeof(struct smb2_close_rsp));
5755 }
5756 
5757 /**
5758  * smb2_close() - handler for smb2 close file command
5759  * @work:	smb work containing close request buffer
5760  *
5761  * Return:	0
5762  */
smb2_close(struct ksmbd_work * work)5763 int smb2_close(struct ksmbd_work *work)
5764 {
5765 	u64 volatile_id = KSMBD_NO_FID;
5766 	u64 sess_id;
5767 	struct smb2_close_req *req;
5768 	struct smb2_close_rsp *rsp;
5769 	struct ksmbd_conn *conn = work->conn;
5770 	struct ksmbd_file *fp;
5771 	u64 time;
5772 	int err = 0;
5773 
5774 	ksmbd_debug(SMB, "Received smb2 close request\n");
5775 
5776 	WORK_BUFFERS(work, req, rsp);
5777 
5778 	if (test_share_config_flag(work->tcon->share_conf,
5779 				   KSMBD_SHARE_FLAG_PIPE)) {
5780 		ksmbd_debug(SMB, "IPC pipe close request\n");
5781 		return smb2_close_pipe(work);
5782 	}
5783 
5784 	sess_id = le64_to_cpu(req->hdr.SessionId);
5785 	if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5786 		sess_id = work->compound_sid;
5787 
5788 	work->compound_sid = 0;
5789 	if (check_session_id(conn, sess_id)) {
5790 		work->compound_sid = sess_id;
5791 	} else {
5792 		rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5793 		if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5794 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5795 		err = -EBADF;
5796 		goto out;
5797 	}
5798 
5799 	if (work->next_smb2_rcv_hdr_off &&
5800 	    !has_file_id(req->VolatileFileId)) {
5801 		if (!has_file_id(work->compound_fid)) {
5802 			/* file already closed, return FILE_CLOSED */
5803 			ksmbd_debug(SMB, "file already closed\n");
5804 			rsp->hdr.Status = STATUS_FILE_CLOSED;
5805 			err = -EBADF;
5806 			goto out;
5807 		} else {
5808 			ksmbd_debug(SMB,
5809 				    "Compound request set FID = %llu:%llu\n",
5810 				    work->compound_fid,
5811 				    work->compound_pfid);
5812 			volatile_id = work->compound_fid;
5813 
5814 			/* file closed, stored id is not valid anymore */
5815 			work->compound_fid = KSMBD_NO_FID;
5816 			work->compound_pfid = KSMBD_NO_FID;
5817 		}
5818 	} else {
5819 		volatile_id = req->VolatileFileId;
5820 	}
5821 	ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5822 
5823 	rsp->StructureSize = cpu_to_le16(60);
5824 	rsp->Reserved = 0;
5825 
5826 	if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5827 		struct kstat stat;
5828 		int ret;
5829 
5830 		fp = ksmbd_lookup_fd_fast(work, volatile_id);
5831 		if (!fp) {
5832 			err = -ENOENT;
5833 			goto out;
5834 		}
5835 
5836 		ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5837 				  AT_STATX_SYNC_AS_STAT);
5838 		if (ret) {
5839 			ksmbd_fd_put(work, fp);
5840 			goto out;
5841 		}
5842 
5843 		rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5844 		rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5845 			cpu_to_le64(stat.blocks << 9);
5846 		rsp->EndOfFile = cpu_to_le64(stat.size);
5847 		rsp->Attributes = fp->f_ci->m_fattr;
5848 		rsp->CreationTime = cpu_to_le64(fp->create_time);
5849 		time = ksmbd_UnixTimeToNT(stat.atime);
5850 		rsp->LastAccessTime = cpu_to_le64(time);
5851 		time = ksmbd_UnixTimeToNT(stat.mtime);
5852 		rsp->LastWriteTime = cpu_to_le64(time);
5853 		time = ksmbd_UnixTimeToNT(stat.ctime);
5854 		rsp->ChangeTime = cpu_to_le64(time);
5855 		ksmbd_fd_put(work, fp);
5856 	} else {
5857 		rsp->Flags = 0;
5858 		rsp->AllocationSize = 0;
5859 		rsp->EndOfFile = 0;
5860 		rsp->Attributes = 0;
5861 		rsp->CreationTime = 0;
5862 		rsp->LastAccessTime = 0;
5863 		rsp->LastWriteTime = 0;
5864 		rsp->ChangeTime = 0;
5865 	}
5866 
5867 	err = ksmbd_close_fd(work, volatile_id);
5868 out:
5869 	if (!err)
5870 		err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5871 					sizeof(struct smb2_close_rsp));
5872 
5873 	if (err) {
5874 		if (rsp->hdr.Status == 0)
5875 			rsp->hdr.Status = STATUS_FILE_CLOSED;
5876 		smb2_set_err_rsp(work);
5877 	}
5878 
5879 	return err;
5880 }
5881 
5882 /**
5883  * smb2_echo() - handler for smb2 echo(ping) command
5884  * @work:	smb work containing echo request buffer
5885  *
5886  * Return:	0
5887  */
smb2_echo(struct ksmbd_work * work)5888 int smb2_echo(struct ksmbd_work *work)
5889 {
5890 	struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5891 
5892 	ksmbd_debug(SMB, "Received smb2 echo request\n");
5893 
5894 	if (work->next_smb2_rcv_hdr_off)
5895 		rsp = ksmbd_resp_buf_next(work);
5896 
5897 	rsp->StructureSize = cpu_to_le16(4);
5898 	rsp->Reserved = 0;
5899 	return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5900 }
5901 
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5902 static int smb2_rename(struct ksmbd_work *work,
5903 		       struct ksmbd_file *fp,
5904 		       struct smb2_file_rename_info *file_info,
5905 		       struct nls_table *local_nls)
5906 {
5907 	struct ksmbd_share_config *share = fp->tcon->share_conf;
5908 	char *new_name = NULL;
5909 	int rc, flags = 0;
5910 
5911 	ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5912 	new_name = smb2_get_name(file_info->FileName,
5913 				 le32_to_cpu(file_info->FileNameLength),
5914 				 local_nls);
5915 	if (IS_ERR(new_name))
5916 		return PTR_ERR(new_name);
5917 
5918 	if (strchr(new_name, ':')) {
5919 		int s_type;
5920 		char *xattr_stream_name, *stream_name = NULL;
5921 		size_t xattr_stream_size;
5922 		int len;
5923 
5924 		rc = parse_stream_name(new_name, &stream_name, &s_type);
5925 		if (rc < 0)
5926 			goto out;
5927 
5928 		len = strlen(new_name);
5929 		if (len > 0 && new_name[len - 1] != '/') {
5930 			pr_err("not allow base filename in rename\n");
5931 			rc = -ESHARE;
5932 			goto out;
5933 		}
5934 
5935 		rc = ksmbd_vfs_xattr_stream_name(stream_name,
5936 						 &xattr_stream_name,
5937 						 &xattr_stream_size,
5938 						 s_type);
5939 		if (rc)
5940 			goto out;
5941 
5942 		rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5943 					&fp->filp->f_path,
5944 					xattr_stream_name,
5945 					NULL, 0, 0, true);
5946 		if (rc < 0) {
5947 			pr_err("failed to store stream name in xattr: %d\n",
5948 			       rc);
5949 			rc = -EINVAL;
5950 			goto out;
5951 		}
5952 
5953 		goto out;
5954 	}
5955 
5956 	ksmbd_debug(SMB, "new name %s\n", new_name);
5957 	if (ksmbd_share_veto_filename(share, new_name)) {
5958 		rc = -ENOENT;
5959 		ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5960 		goto out;
5961 	}
5962 
5963 	if (!file_info->ReplaceIfExists)
5964 		flags = RENAME_NOREPLACE;
5965 
5966 	rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5967 	if (!rc)
5968 		smb_break_all_levII_oplock(work, fp, 0);
5969 out:
5970 	kfree(new_name);
5971 	return rc;
5972 }
5973 
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)5974 static int smb2_create_link(struct ksmbd_work *work,
5975 			    struct ksmbd_share_config *share,
5976 			    struct smb2_file_link_info *file_info,
5977 			    unsigned int buf_len, struct file *filp,
5978 			    struct nls_table *local_nls)
5979 {
5980 	char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5981 	struct path path, parent_path;
5982 	bool file_present = false;
5983 	int rc;
5984 
5985 	if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5986 			le32_to_cpu(file_info->FileNameLength))
5987 		return -EINVAL;
5988 
5989 	ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5990 	pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP);
5991 	if (!pathname)
5992 		return -ENOMEM;
5993 
5994 	link_name = smb2_get_name(file_info->FileName,
5995 				  le32_to_cpu(file_info->FileNameLength),
5996 				  local_nls);
5997 	if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5998 		rc = -EINVAL;
5999 		goto out;
6000 	}
6001 
6002 	ksmbd_debug(SMB, "link name is %s\n", link_name);
6003 	target_name = file_path(filp, pathname, PATH_MAX);
6004 	if (IS_ERR(target_name)) {
6005 		rc = -EINVAL;
6006 		goto out;
6007 	}
6008 
6009 	ksmbd_debug(SMB, "target name is %s\n", target_name);
6010 	rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
6011 					&parent_path, &path, 0);
6012 	if (rc) {
6013 		if (rc != -ENOENT)
6014 			goto out;
6015 	} else
6016 		file_present = true;
6017 
6018 	if (file_info->ReplaceIfExists) {
6019 		if (file_present) {
6020 			rc = ksmbd_vfs_remove_file(work, &path);
6021 			if (rc) {
6022 				rc = -EINVAL;
6023 				ksmbd_debug(SMB, "cannot delete %s\n",
6024 					    link_name);
6025 				goto out;
6026 			}
6027 		}
6028 	} else {
6029 		if (file_present) {
6030 			rc = -EEXIST;
6031 			ksmbd_debug(SMB, "link already exists\n");
6032 			goto out;
6033 		}
6034 	}
6035 
6036 	rc = ksmbd_vfs_link(work, target_name, link_name);
6037 	if (rc)
6038 		rc = -EINVAL;
6039 out:
6040 	if (file_present)
6041 		ksmbd_vfs_kern_path_unlock(&parent_path, &path);
6042 
6043 	if (!IS_ERR(link_name))
6044 		kfree(link_name);
6045 	kfree(pathname);
6046 	return rc;
6047 }
6048 
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)6049 static int set_file_basic_info(struct ksmbd_file *fp,
6050 			       struct smb2_file_basic_info *file_info,
6051 			       struct ksmbd_share_config *share)
6052 {
6053 	struct iattr attrs;
6054 	struct file *filp;
6055 	struct inode *inode;
6056 	struct mnt_idmap *idmap;
6057 	int rc = 0;
6058 
6059 	if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
6060 		return -EACCES;
6061 
6062 	attrs.ia_valid = 0;
6063 	filp = fp->filp;
6064 	inode = file_inode(filp);
6065 	idmap = file_mnt_idmap(filp);
6066 
6067 	if (file_info->CreationTime)
6068 		fp->create_time = le64_to_cpu(file_info->CreationTime);
6069 
6070 	if (file_info->LastAccessTime) {
6071 		attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
6072 		attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
6073 	}
6074 
6075 	if (file_info->ChangeTime)
6076 		inode_set_ctime_to_ts(inode,
6077 				ksmbd_NTtimeToUnix(file_info->ChangeTime));
6078 
6079 	if (file_info->LastWriteTime) {
6080 		attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
6081 		attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME);
6082 	}
6083 
6084 	if (file_info->Attributes) {
6085 		if (!S_ISDIR(inode->i_mode) &&
6086 		    file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
6087 			pr_err("can't change a file to a directory\n");
6088 			return -EINVAL;
6089 		}
6090 
6091 		if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
6092 			fp->f_ci->m_fattr = file_info->Attributes |
6093 				(fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6094 	}
6095 
6096 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6097 	    (file_info->CreationTime || file_info->Attributes)) {
6098 		struct xattr_dos_attrib da = {0};
6099 
6100 		da.version = 4;
6101 		da.itime = fp->itime;
6102 		da.create_time = fp->create_time;
6103 		da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6104 		da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6105 			XATTR_DOSINFO_ITIME;
6106 
6107 		rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6108 				true);
6109 		if (rc)
6110 			ksmbd_debug(SMB,
6111 				    "failed to restore file attribute in EA\n");
6112 		rc = 0;
6113 	}
6114 
6115 	if (attrs.ia_valid) {
6116 		struct dentry *dentry = filp->f_path.dentry;
6117 		struct inode *inode = d_inode(dentry);
6118 
6119 		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6120 			return -EACCES;
6121 
6122 		inode_lock(inode);
6123 		rc = notify_change(idmap, dentry, &attrs, NULL);
6124 		inode_unlock(inode);
6125 	}
6126 	return rc;
6127 }
6128 
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)6129 static int set_file_allocation_info(struct ksmbd_work *work,
6130 				    struct ksmbd_file *fp,
6131 				    struct smb2_file_alloc_info *file_alloc_info)
6132 {
6133 	/*
6134 	 * TODO : It's working fine only when store dos attributes
6135 	 * is not yes. need to implement a logic which works
6136 	 * properly with any smb.conf option
6137 	 */
6138 
6139 	loff_t alloc_blks;
6140 	struct inode *inode;
6141 	struct kstat stat;
6142 	int rc;
6143 
6144 	if (!(fp->daccess & FILE_WRITE_DATA_LE))
6145 		return -EACCES;
6146 
6147 	rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6148 			 AT_STATX_SYNC_AS_STAT);
6149 	if (rc)
6150 		return rc;
6151 
6152 	alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6153 	inode = file_inode(fp->filp);
6154 
6155 	if (alloc_blks > stat.blocks) {
6156 		smb_break_all_levII_oplock(work, fp, 1);
6157 		rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6158 				   alloc_blks * 512);
6159 		if (rc && rc != -EOPNOTSUPP) {
6160 			pr_err("vfs_fallocate is failed : %d\n", rc);
6161 			return rc;
6162 		}
6163 	} else if (alloc_blks < stat.blocks) {
6164 		loff_t size;
6165 
6166 		/*
6167 		 * Allocation size could be smaller than original one
6168 		 * which means allocated blocks in file should be
6169 		 * deallocated. use truncate to cut out it, but inode
6170 		 * size is also updated with truncate offset.
6171 		 * inode size is retained by backup inode size.
6172 		 */
6173 		size = i_size_read(inode);
6174 		rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6175 		if (rc) {
6176 			pr_err("truncate failed!, err %d\n", rc);
6177 			return rc;
6178 		}
6179 		if (size < alloc_blks * 512)
6180 			i_size_write(inode, size);
6181 	}
6182 	return 0;
6183 }
6184 
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)6185 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6186 				struct smb2_file_eof_info *file_eof_info)
6187 {
6188 	loff_t newsize;
6189 	struct inode *inode;
6190 	int rc;
6191 
6192 	if (!(fp->daccess & FILE_WRITE_DATA_LE))
6193 		return -EACCES;
6194 
6195 	newsize = le64_to_cpu(file_eof_info->EndOfFile);
6196 	inode = file_inode(fp->filp);
6197 
6198 	/*
6199 	 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6200 	 * on FAT32 shared device, truncate execution time is too long
6201 	 * and network error could cause from windows client. because
6202 	 * truncate of some filesystem like FAT32 fill zero data in
6203 	 * truncated range.
6204 	 */
6205 	if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6206 		ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6207 		rc = ksmbd_vfs_truncate(work, fp, newsize);
6208 		if (rc) {
6209 			ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6210 			if (rc != -EAGAIN)
6211 				rc = -EBADF;
6212 			return rc;
6213 		}
6214 	}
6215 	return 0;
6216 }
6217 
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)6218 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6219 			   struct smb2_file_rename_info *rename_info,
6220 			   unsigned int buf_len)
6221 {
6222 	if (!(fp->daccess & FILE_DELETE_LE)) {
6223 		pr_err("no right to delete : 0x%x\n", fp->daccess);
6224 		return -EACCES;
6225 	}
6226 
6227 	if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6228 			le32_to_cpu(rename_info->FileNameLength))
6229 		return -EINVAL;
6230 
6231 	if (!le32_to_cpu(rename_info->FileNameLength))
6232 		return -EINVAL;
6233 
6234 	return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6235 }
6236 
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)6237 static int set_file_disposition_info(struct ksmbd_file *fp,
6238 				     struct smb2_file_disposition_info *file_info)
6239 {
6240 	struct inode *inode;
6241 
6242 	if (!(fp->daccess & FILE_DELETE_LE)) {
6243 		pr_err("no right to delete : 0x%x\n", fp->daccess);
6244 		return -EACCES;
6245 	}
6246 
6247 	inode = file_inode(fp->filp);
6248 	if (file_info->DeletePending) {
6249 		if (S_ISDIR(inode->i_mode) &&
6250 		    ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6251 			return -EBUSY;
6252 		ksmbd_set_inode_pending_delete(fp);
6253 	} else {
6254 		ksmbd_clear_inode_pending_delete(fp);
6255 	}
6256 	return 0;
6257 }
6258 
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)6259 static int set_file_position_info(struct ksmbd_file *fp,
6260 				  struct smb2_file_pos_info *file_info)
6261 {
6262 	loff_t current_byte_offset;
6263 	unsigned long sector_size;
6264 	struct inode *inode;
6265 
6266 	inode = file_inode(fp->filp);
6267 	current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6268 	sector_size = inode->i_sb->s_blocksize;
6269 
6270 	if (current_byte_offset < 0 ||
6271 	    (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6272 	     current_byte_offset & (sector_size - 1))) {
6273 		pr_err("CurrentByteOffset is not valid : %llu\n",
6274 		       current_byte_offset);
6275 		return -EINVAL;
6276 	}
6277 
6278 	fp->filp->f_pos = current_byte_offset;
6279 	return 0;
6280 }
6281 
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)6282 static int set_file_mode_info(struct ksmbd_file *fp,
6283 			      struct smb2_file_mode_info *file_info)
6284 {
6285 	__le32 mode;
6286 
6287 	mode = file_info->Mode;
6288 
6289 	if ((mode & ~FILE_MODE_INFO_MASK)) {
6290 		pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6291 		return -EINVAL;
6292 	}
6293 
6294 	/*
6295 	 * TODO : need to implement consideration for
6296 	 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6297 	 */
6298 	ksmbd_vfs_set_fadvise(fp->filp, mode);
6299 	fp->coption = mode;
6300 	return 0;
6301 }
6302 
6303 /**
6304  * smb2_set_info_file() - handler for smb2 set info command
6305  * @work:	smb work containing set info command buffer
6306  * @fp:		ksmbd_file pointer
6307  * @req:	request buffer pointer
6308  * @share:	ksmbd_share_config pointer
6309  *
6310  * Return:	0 on success, otherwise error
6311  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6312  */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)6313 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6314 			      struct smb2_set_info_req *req,
6315 			      struct ksmbd_share_config *share)
6316 {
6317 	unsigned int buf_len = le32_to_cpu(req->BufferLength);
6318 	char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6319 
6320 	switch (req->FileInfoClass) {
6321 	case FILE_BASIC_INFORMATION:
6322 	{
6323 		if (buf_len < sizeof(struct smb2_file_basic_info))
6324 			return -EINVAL;
6325 
6326 		return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6327 	}
6328 	case FILE_ALLOCATION_INFORMATION:
6329 	{
6330 		if (buf_len < sizeof(struct smb2_file_alloc_info))
6331 			return -EINVAL;
6332 
6333 		return set_file_allocation_info(work, fp,
6334 						(struct smb2_file_alloc_info *)buffer);
6335 	}
6336 	case FILE_END_OF_FILE_INFORMATION:
6337 	{
6338 		if (buf_len < sizeof(struct smb2_file_eof_info))
6339 			return -EINVAL;
6340 
6341 		return set_end_of_file_info(work, fp,
6342 					    (struct smb2_file_eof_info *)buffer);
6343 	}
6344 	case FILE_RENAME_INFORMATION:
6345 	{
6346 		if (buf_len < sizeof(struct smb2_file_rename_info))
6347 			return -EINVAL;
6348 
6349 		return set_rename_info(work, fp,
6350 				       (struct smb2_file_rename_info *)buffer,
6351 				       buf_len);
6352 	}
6353 	case FILE_LINK_INFORMATION:
6354 	{
6355 		if (buf_len < sizeof(struct smb2_file_link_info))
6356 			return -EINVAL;
6357 
6358 		return smb2_create_link(work, work->tcon->share_conf,
6359 					(struct smb2_file_link_info *)buffer,
6360 					buf_len, fp->filp,
6361 					work->conn->local_nls);
6362 	}
6363 	case FILE_DISPOSITION_INFORMATION:
6364 	{
6365 		if (buf_len < sizeof(struct smb2_file_disposition_info))
6366 			return -EINVAL;
6367 
6368 		return set_file_disposition_info(fp,
6369 						 (struct smb2_file_disposition_info *)buffer);
6370 	}
6371 	case FILE_FULL_EA_INFORMATION:
6372 	{
6373 		if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6374 			pr_err("Not permitted to write ext  attr: 0x%x\n",
6375 			       fp->daccess);
6376 			return -EACCES;
6377 		}
6378 
6379 		if (buf_len < sizeof(struct smb2_ea_info))
6380 			return -EINVAL;
6381 
6382 		return smb2_set_ea((struct smb2_ea_info *)buffer,
6383 				   buf_len, &fp->filp->f_path, true);
6384 	}
6385 	case FILE_POSITION_INFORMATION:
6386 	{
6387 		if (buf_len < sizeof(struct smb2_file_pos_info))
6388 			return -EINVAL;
6389 
6390 		return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6391 	}
6392 	case FILE_MODE_INFORMATION:
6393 	{
6394 		if (buf_len < sizeof(struct smb2_file_mode_info))
6395 			return -EINVAL;
6396 
6397 		return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6398 	}
6399 	}
6400 
6401 	pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6402 	return -EOPNOTSUPP;
6403 }
6404 
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6405 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6406 			     char *buffer, int buf_len)
6407 {
6408 	struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6409 
6410 	fp->saccess |= FILE_SHARE_DELETE_LE;
6411 
6412 	return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6413 			buf_len, false, true);
6414 }
6415 
6416 /**
6417  * smb2_set_info() - handler for smb2 set info command handler
6418  * @work:	smb work containing set info request buffer
6419  *
6420  * Return:	0 on success, otherwise error
6421  */
smb2_set_info(struct ksmbd_work * work)6422 int smb2_set_info(struct ksmbd_work *work)
6423 {
6424 	struct smb2_set_info_req *req;
6425 	struct smb2_set_info_rsp *rsp;
6426 	struct ksmbd_file *fp = NULL;
6427 	int rc = 0;
6428 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6429 
6430 	ksmbd_debug(SMB, "Received smb2 set info request\n");
6431 
6432 	if (work->next_smb2_rcv_hdr_off) {
6433 		req = ksmbd_req_buf_next(work);
6434 		rsp = ksmbd_resp_buf_next(work);
6435 		if (!has_file_id(req->VolatileFileId)) {
6436 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6437 				    work->compound_fid);
6438 			id = work->compound_fid;
6439 			pid = work->compound_pfid;
6440 		}
6441 	} else {
6442 		req = smb2_get_msg(work->request_buf);
6443 		rsp = smb2_get_msg(work->response_buf);
6444 	}
6445 
6446 	if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6447 		ksmbd_debug(SMB, "User does not have write permission\n");
6448 		pr_err("User does not have write permission\n");
6449 		rc = -EACCES;
6450 		goto err_out;
6451 	}
6452 
6453 	if (!has_file_id(id)) {
6454 		id = req->VolatileFileId;
6455 		pid = req->PersistentFileId;
6456 	}
6457 
6458 	fp = ksmbd_lookup_fd_slow(work, id, pid);
6459 	if (!fp) {
6460 		ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6461 		rc = -ENOENT;
6462 		goto err_out;
6463 	}
6464 
6465 	switch (req->InfoType) {
6466 	case SMB2_O_INFO_FILE:
6467 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6468 		rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6469 		break;
6470 	case SMB2_O_INFO_SECURITY:
6471 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6472 		if (ksmbd_override_fsids(work)) {
6473 			rc = -ENOMEM;
6474 			goto err_out;
6475 		}
6476 		rc = smb2_set_info_sec(fp,
6477 				       le32_to_cpu(req->AdditionalInformation),
6478 				       (char *)req + le16_to_cpu(req->BufferOffset),
6479 				       le32_to_cpu(req->BufferLength));
6480 		ksmbd_revert_fsids(work);
6481 		break;
6482 	default:
6483 		rc = -EOPNOTSUPP;
6484 	}
6485 
6486 	if (rc < 0)
6487 		goto err_out;
6488 
6489 	rsp->StructureSize = cpu_to_le16(2);
6490 	rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6491 			       sizeof(struct smb2_set_info_rsp));
6492 	if (rc)
6493 		goto err_out;
6494 	ksmbd_fd_put(work, fp);
6495 	return 0;
6496 
6497 err_out:
6498 	if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6499 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
6500 	else if (rc == -EINVAL)
6501 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6502 	else if (rc == -ESHARE)
6503 		rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6504 	else if (rc == -ENOENT)
6505 		rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6506 	else if (rc == -EBUSY || rc == -ENOTEMPTY)
6507 		rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6508 	else if (rc == -EAGAIN)
6509 		rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6510 	else if (rc == -EBADF || rc == -ESTALE)
6511 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
6512 	else if (rc == -EEXIST)
6513 		rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6514 	else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6515 		rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6516 	smb2_set_err_rsp(work);
6517 	ksmbd_fd_put(work, fp);
6518 	ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6519 	return rc;
6520 }
6521 
6522 /**
6523  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6524  * @work:	smb work containing read IPC pipe command buffer
6525  *
6526  * Return:	0 on success, otherwise error
6527  */
smb2_read_pipe(struct ksmbd_work * work)6528 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6529 {
6530 	int nbytes = 0, err;
6531 	u64 id;
6532 	struct ksmbd_rpc_command *rpc_resp;
6533 	struct smb2_read_req *req;
6534 	struct smb2_read_rsp *rsp;
6535 
6536 	WORK_BUFFERS(work, req, rsp);
6537 
6538 	id = req->VolatileFileId;
6539 
6540 	rpc_resp = ksmbd_rpc_read(work->sess, id);
6541 	if (rpc_resp) {
6542 		void *aux_payload_buf;
6543 
6544 		if (rpc_resp->flags != KSMBD_RPC_OK) {
6545 			err = -EINVAL;
6546 			goto out;
6547 		}
6548 
6549 		aux_payload_buf =
6550 			kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP);
6551 		if (!aux_payload_buf) {
6552 			err = -ENOMEM;
6553 			goto out;
6554 		}
6555 
6556 		memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6557 
6558 		nbytes = rpc_resp->payload_sz;
6559 		err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6560 					     offsetof(struct smb2_read_rsp, Buffer),
6561 					     aux_payload_buf, nbytes);
6562 		if (err) {
6563 			kvfree(aux_payload_buf);
6564 			goto out;
6565 		}
6566 		kvfree(rpc_resp);
6567 	} else {
6568 		err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6569 					offsetof(struct smb2_read_rsp, Buffer));
6570 		if (err)
6571 			goto out;
6572 	}
6573 
6574 	rsp->StructureSize = cpu_to_le16(17);
6575 	rsp->DataOffset = 80;
6576 	rsp->Reserved = 0;
6577 	rsp->DataLength = cpu_to_le32(nbytes);
6578 	rsp->DataRemaining = 0;
6579 	rsp->Flags = 0;
6580 	return 0;
6581 
6582 out:
6583 	rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6584 	smb2_set_err_rsp(work);
6585 	kvfree(rpc_resp);
6586 	return err;
6587 }
6588 
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6589 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6590 					struct smb2_buffer_desc_v1 *desc,
6591 					__le32 Channel,
6592 					__le16 ChannelInfoLength)
6593 {
6594 	unsigned int i, ch_count;
6595 
6596 	if (work->conn->dialect == SMB30_PROT_ID &&
6597 	    Channel != SMB2_CHANNEL_RDMA_V1)
6598 		return -EINVAL;
6599 
6600 	ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6601 	if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6602 		for (i = 0; i < ch_count; i++) {
6603 			pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6604 				i,
6605 				le32_to_cpu(desc[i].token),
6606 				le32_to_cpu(desc[i].length));
6607 		}
6608 	}
6609 	if (!ch_count)
6610 		return -EINVAL;
6611 
6612 	work->need_invalidate_rkey =
6613 		(Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6614 	if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6615 		work->remote_key = le32_to_cpu(desc->token);
6616 	return 0;
6617 }
6618 
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6619 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6620 				      struct smb2_read_req *req, void *data_buf,
6621 				      size_t length)
6622 {
6623 	int err;
6624 
6625 	err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6626 				    (struct smb2_buffer_desc_v1 *)
6627 				    ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6628 				    le16_to_cpu(req->ReadChannelInfoLength));
6629 	if (err)
6630 		return err;
6631 
6632 	return length;
6633 }
6634 
6635 /**
6636  * smb2_read() - handler for smb2 read from file
6637  * @work:	smb work containing read command buffer
6638  *
6639  * Return:	0 on success, otherwise error
6640  */
smb2_read(struct ksmbd_work * work)6641 int smb2_read(struct ksmbd_work *work)
6642 {
6643 	struct ksmbd_conn *conn = work->conn;
6644 	struct smb2_read_req *req;
6645 	struct smb2_read_rsp *rsp;
6646 	struct ksmbd_file *fp = NULL;
6647 	loff_t offset;
6648 	size_t length, mincount;
6649 	ssize_t nbytes = 0, remain_bytes = 0;
6650 	int err = 0;
6651 	bool is_rdma_channel = false;
6652 	unsigned int max_read_size = conn->vals->max_read_size;
6653 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6654 	void *aux_payload_buf;
6655 
6656 	ksmbd_debug(SMB, "Received smb2 read request\n");
6657 
6658 	if (test_share_config_flag(work->tcon->share_conf,
6659 				   KSMBD_SHARE_FLAG_PIPE)) {
6660 		ksmbd_debug(SMB, "IPC pipe read request\n");
6661 		return smb2_read_pipe(work);
6662 	}
6663 
6664 	if (work->next_smb2_rcv_hdr_off) {
6665 		req = ksmbd_req_buf_next(work);
6666 		rsp = ksmbd_resp_buf_next(work);
6667 		if (!has_file_id(req->VolatileFileId)) {
6668 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6669 					work->compound_fid);
6670 			id = work->compound_fid;
6671 			pid = work->compound_pfid;
6672 		}
6673 	} else {
6674 		req = smb2_get_msg(work->request_buf);
6675 		rsp = smb2_get_msg(work->response_buf);
6676 	}
6677 
6678 	if (!has_file_id(id)) {
6679 		id = req->VolatileFileId;
6680 		pid = req->PersistentFileId;
6681 	}
6682 
6683 	if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6684 	    req->Channel == SMB2_CHANNEL_RDMA_V1) {
6685 		is_rdma_channel = true;
6686 		max_read_size = get_smbd_max_read_write_size();
6687 	}
6688 
6689 	if (is_rdma_channel == true) {
6690 		unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6691 
6692 		if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6693 			err = -EINVAL;
6694 			goto out;
6695 		}
6696 		err = smb2_set_remote_key_for_rdma(work,
6697 						   (struct smb2_buffer_desc_v1 *)
6698 						   ((char *)req + ch_offset),
6699 						   req->Channel,
6700 						   req->ReadChannelInfoLength);
6701 		if (err)
6702 			goto out;
6703 	}
6704 
6705 	fp = ksmbd_lookup_fd_slow(work, id, pid);
6706 	if (!fp) {
6707 		err = -ENOENT;
6708 		goto out;
6709 	}
6710 
6711 	if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6712 		pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6713 		err = -EACCES;
6714 		goto out;
6715 	}
6716 
6717 	offset = le64_to_cpu(req->Offset);
6718 	if (offset < 0) {
6719 		err = -EINVAL;
6720 		goto out;
6721 	}
6722 	length = le32_to_cpu(req->Length);
6723 	mincount = le32_to_cpu(req->MinimumCount);
6724 
6725 	if (length > max_read_size) {
6726 		ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6727 			    max_read_size);
6728 		err = -EINVAL;
6729 		goto out;
6730 	}
6731 
6732 	ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6733 		    fp->filp, offset, length);
6734 
6735 	aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP);
6736 	if (!aux_payload_buf) {
6737 		err = -ENOMEM;
6738 		goto out;
6739 	}
6740 
6741 	nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6742 	if (nbytes < 0) {
6743 		err = nbytes;
6744 		goto out;
6745 	}
6746 
6747 	if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6748 		kvfree(aux_payload_buf);
6749 		rsp->hdr.Status = STATUS_END_OF_FILE;
6750 		smb2_set_err_rsp(work);
6751 		ksmbd_fd_put(work, fp);
6752 		return 0;
6753 	}
6754 
6755 	ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6756 		    nbytes, offset, mincount);
6757 
6758 	if (is_rdma_channel == true) {
6759 		/* write data to the client using rdma channel */
6760 		remain_bytes = smb2_read_rdma_channel(work, req,
6761 						      aux_payload_buf,
6762 						      nbytes);
6763 		kvfree(aux_payload_buf);
6764 		aux_payload_buf = NULL;
6765 		nbytes = 0;
6766 		if (remain_bytes < 0) {
6767 			err = (int)remain_bytes;
6768 			goto out;
6769 		}
6770 	}
6771 
6772 	rsp->StructureSize = cpu_to_le16(17);
6773 	rsp->DataOffset = 80;
6774 	rsp->Reserved = 0;
6775 	rsp->DataLength = cpu_to_le32(nbytes);
6776 	rsp->DataRemaining = cpu_to_le32(remain_bytes);
6777 	rsp->Flags = 0;
6778 	err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6779 				     offsetof(struct smb2_read_rsp, Buffer),
6780 				     aux_payload_buf, nbytes);
6781 	if (err) {
6782 		kvfree(aux_payload_buf);
6783 		goto out;
6784 	}
6785 	ksmbd_fd_put(work, fp);
6786 	return 0;
6787 
6788 out:
6789 	if (err) {
6790 		if (err == -EISDIR)
6791 			rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6792 		else if (err == -EAGAIN)
6793 			rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6794 		else if (err == -ENOENT)
6795 			rsp->hdr.Status = STATUS_FILE_CLOSED;
6796 		else if (err == -EACCES)
6797 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
6798 		else if (err == -ESHARE)
6799 			rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6800 		else if (err == -EINVAL)
6801 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6802 		else
6803 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
6804 
6805 		smb2_set_err_rsp(work);
6806 	}
6807 	ksmbd_fd_put(work, fp);
6808 	return err;
6809 }
6810 
6811 /**
6812  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6813  * @work:	smb work containing write IPC pipe command buffer
6814  *
6815  * Return:	0 on success, otherwise error
6816  */
smb2_write_pipe(struct ksmbd_work * work)6817 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6818 {
6819 	struct smb2_write_req *req;
6820 	struct smb2_write_rsp *rsp;
6821 	struct ksmbd_rpc_command *rpc_resp;
6822 	u64 id = 0;
6823 	int err = 0, ret = 0;
6824 	char *data_buf;
6825 	size_t length;
6826 
6827 	WORK_BUFFERS(work, req, rsp);
6828 
6829 	length = le32_to_cpu(req->Length);
6830 	id = req->VolatileFileId;
6831 
6832 	if ((u64)le16_to_cpu(req->DataOffset) + length >
6833 	    get_rfc1002_len(work->request_buf)) {
6834 		pr_err("invalid write data offset %u, smb_len %u\n",
6835 		       le16_to_cpu(req->DataOffset),
6836 		       get_rfc1002_len(work->request_buf));
6837 		err = -EINVAL;
6838 		goto out;
6839 	}
6840 
6841 	data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6842 			   le16_to_cpu(req->DataOffset));
6843 
6844 	rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6845 	if (rpc_resp) {
6846 		if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6847 			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6848 			kvfree(rpc_resp);
6849 			smb2_set_err_rsp(work);
6850 			return -EOPNOTSUPP;
6851 		}
6852 		if (rpc_resp->flags != KSMBD_RPC_OK) {
6853 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
6854 			smb2_set_err_rsp(work);
6855 			kvfree(rpc_resp);
6856 			return ret;
6857 		}
6858 		kvfree(rpc_resp);
6859 	}
6860 
6861 	rsp->StructureSize = cpu_to_le16(17);
6862 	rsp->DataOffset = 0;
6863 	rsp->Reserved = 0;
6864 	rsp->DataLength = cpu_to_le32(length);
6865 	rsp->DataRemaining = 0;
6866 	rsp->Reserved2 = 0;
6867 	err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6868 				offsetof(struct smb2_write_rsp, Buffer));
6869 out:
6870 	if (err) {
6871 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
6872 		smb2_set_err_rsp(work);
6873 	}
6874 
6875 	return err;
6876 }
6877 
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)6878 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6879 				       struct smb2_write_req *req,
6880 				       struct ksmbd_file *fp,
6881 				       loff_t offset, size_t length, bool sync)
6882 {
6883 	char *data_buf;
6884 	int ret;
6885 	ssize_t nbytes;
6886 
6887 	data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP);
6888 	if (!data_buf)
6889 		return -ENOMEM;
6890 
6891 	ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6892 				   (struct smb2_buffer_desc_v1 *)
6893 				   ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6894 				   le16_to_cpu(req->WriteChannelInfoLength));
6895 	if (ret < 0) {
6896 		kvfree(data_buf);
6897 		return ret;
6898 	}
6899 
6900 	ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6901 	kvfree(data_buf);
6902 	if (ret < 0)
6903 		return ret;
6904 
6905 	return nbytes;
6906 }
6907 
6908 /**
6909  * smb2_write() - handler for smb2 write from file
6910  * @work:	smb work containing write command buffer
6911  *
6912  * Return:	0 on success, otherwise error
6913  */
smb2_write(struct ksmbd_work * work)6914 int smb2_write(struct ksmbd_work *work)
6915 {
6916 	struct smb2_write_req *req;
6917 	struct smb2_write_rsp *rsp;
6918 	struct ksmbd_file *fp = NULL;
6919 	loff_t offset;
6920 	size_t length;
6921 	ssize_t nbytes;
6922 	char *data_buf;
6923 	bool writethrough = false, is_rdma_channel = false;
6924 	int err = 0;
6925 	unsigned int max_write_size = work->conn->vals->max_write_size;
6926 
6927 	ksmbd_debug(SMB, "Received smb2 write request\n");
6928 
6929 	WORK_BUFFERS(work, req, rsp);
6930 
6931 	if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6932 		ksmbd_debug(SMB, "IPC pipe write request\n");
6933 		return smb2_write_pipe(work);
6934 	}
6935 
6936 	offset = le64_to_cpu(req->Offset);
6937 	if (offset < 0)
6938 		return -EINVAL;
6939 	length = le32_to_cpu(req->Length);
6940 
6941 	if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6942 	    req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6943 		is_rdma_channel = true;
6944 		max_write_size = get_smbd_max_read_write_size();
6945 		length = le32_to_cpu(req->RemainingBytes);
6946 	}
6947 
6948 	if (is_rdma_channel == true) {
6949 		unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6950 
6951 		if (req->Length != 0 || req->DataOffset != 0 ||
6952 		    ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6953 			err = -EINVAL;
6954 			goto out;
6955 		}
6956 		err = smb2_set_remote_key_for_rdma(work,
6957 						   (struct smb2_buffer_desc_v1 *)
6958 						   ((char *)req + ch_offset),
6959 						   req->Channel,
6960 						   req->WriteChannelInfoLength);
6961 		if (err)
6962 			goto out;
6963 	}
6964 
6965 	if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6966 		ksmbd_debug(SMB, "User does not have write permission\n");
6967 		err = -EACCES;
6968 		goto out;
6969 	}
6970 
6971 	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6972 	if (!fp) {
6973 		err = -ENOENT;
6974 		goto out;
6975 	}
6976 
6977 	if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6978 		pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6979 		err = -EACCES;
6980 		goto out;
6981 	}
6982 
6983 	if (length > max_write_size) {
6984 		ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6985 			    max_write_size);
6986 		err = -EINVAL;
6987 		goto out;
6988 	}
6989 
6990 	ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6991 	if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6992 		writethrough = true;
6993 
6994 	if (is_rdma_channel == false) {
6995 		if (le16_to_cpu(req->DataOffset) <
6996 		    offsetof(struct smb2_write_req, Buffer)) {
6997 			err = -EINVAL;
6998 			goto out;
6999 		}
7000 
7001 		data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
7002 				    le16_to_cpu(req->DataOffset));
7003 
7004 		ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
7005 			    fp->filp, offset, length);
7006 		err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
7007 				      writethrough, &nbytes);
7008 		if (err < 0)
7009 			goto out;
7010 	} else {
7011 		/* read data from the client using rdma channel, and
7012 		 * write the data.
7013 		 */
7014 		nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
7015 						 writethrough);
7016 		if (nbytes < 0) {
7017 			err = (int)nbytes;
7018 			goto out;
7019 		}
7020 	}
7021 
7022 	rsp->StructureSize = cpu_to_le16(17);
7023 	rsp->DataOffset = 0;
7024 	rsp->Reserved = 0;
7025 	rsp->DataLength = cpu_to_le32(nbytes);
7026 	rsp->DataRemaining = 0;
7027 	rsp->Reserved2 = 0;
7028 	err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
7029 	if (err)
7030 		goto out;
7031 	ksmbd_fd_put(work, fp);
7032 	return 0;
7033 
7034 out:
7035 	if (err == -EAGAIN)
7036 		rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7037 	else if (err == -ENOSPC || err == -EFBIG)
7038 		rsp->hdr.Status = STATUS_DISK_FULL;
7039 	else if (err == -ENOENT)
7040 		rsp->hdr.Status = STATUS_FILE_CLOSED;
7041 	else if (err == -EACCES)
7042 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
7043 	else if (err == -ESHARE)
7044 		rsp->hdr.Status = STATUS_SHARING_VIOLATION;
7045 	else if (err == -EINVAL)
7046 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7047 	else
7048 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
7049 
7050 	smb2_set_err_rsp(work);
7051 	ksmbd_fd_put(work, fp);
7052 	return err;
7053 }
7054 
7055 /**
7056  * smb2_flush() - handler for smb2 flush file - fsync
7057  * @work:	smb work containing flush command buffer
7058  *
7059  * Return:	0 on success, otherwise error
7060  */
smb2_flush(struct ksmbd_work * work)7061 int smb2_flush(struct ksmbd_work *work)
7062 {
7063 	struct smb2_flush_req *req;
7064 	struct smb2_flush_rsp *rsp;
7065 	int err;
7066 
7067 	WORK_BUFFERS(work, req, rsp);
7068 
7069 	ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId);
7070 
7071 	err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
7072 	if (err)
7073 		goto out;
7074 
7075 	rsp->StructureSize = cpu_to_le16(4);
7076 	rsp->Reserved = 0;
7077 	return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
7078 
7079 out:
7080 	rsp->hdr.Status = STATUS_INVALID_HANDLE;
7081 	smb2_set_err_rsp(work);
7082 	return err;
7083 }
7084 
7085 /**
7086  * smb2_cancel() - handler for smb2 cancel command
7087  * @work:	smb work containing cancel command buffer
7088  *
7089  * Return:	0 on success, otherwise error
7090  */
smb2_cancel(struct ksmbd_work * work)7091 int smb2_cancel(struct ksmbd_work *work)
7092 {
7093 	struct ksmbd_conn *conn = work->conn;
7094 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
7095 	struct smb2_hdr *chdr;
7096 	struct ksmbd_work *iter;
7097 	struct list_head *command_list;
7098 
7099 	if (work->next_smb2_rcv_hdr_off)
7100 		hdr = ksmbd_resp_buf_next(work);
7101 
7102 	ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7103 		    hdr->MessageId, hdr->Flags);
7104 
7105 	if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7106 		command_list = &conn->async_requests;
7107 
7108 		spin_lock(&conn->request_lock);
7109 		list_for_each_entry(iter, command_list,
7110 				    async_request_entry) {
7111 			chdr = smb2_get_msg(iter->request_buf);
7112 
7113 			if (iter->async_id !=
7114 			    le64_to_cpu(hdr->Id.AsyncId))
7115 				continue;
7116 
7117 			ksmbd_debug(SMB,
7118 				    "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7119 				    le64_to_cpu(hdr->Id.AsyncId),
7120 				    le16_to_cpu(chdr->Command));
7121 			iter->state = KSMBD_WORK_CANCELLED;
7122 			if (iter->cancel_fn)
7123 				iter->cancel_fn(iter->cancel_argv);
7124 			break;
7125 		}
7126 		spin_unlock(&conn->request_lock);
7127 	} else {
7128 		command_list = &conn->requests;
7129 
7130 		spin_lock(&conn->request_lock);
7131 		list_for_each_entry(iter, command_list, request_entry) {
7132 			chdr = smb2_get_msg(iter->request_buf);
7133 
7134 			if (chdr->MessageId != hdr->MessageId ||
7135 			    iter == work)
7136 				continue;
7137 
7138 			ksmbd_debug(SMB,
7139 				    "smb2 with mid %llu cancelled command = 0x%x\n",
7140 				    le64_to_cpu(hdr->MessageId),
7141 				    le16_to_cpu(chdr->Command));
7142 			iter->state = KSMBD_WORK_CANCELLED;
7143 			break;
7144 		}
7145 		spin_unlock(&conn->request_lock);
7146 	}
7147 
7148 	/* For SMB2_CANCEL command itself send no response*/
7149 	work->send_no_response = 1;
7150 	return 0;
7151 }
7152 
smb_flock_init(struct file * f)7153 struct file_lock *smb_flock_init(struct file *f)
7154 {
7155 	struct file_lock *fl;
7156 
7157 	fl = locks_alloc_lock();
7158 	if (!fl)
7159 		goto out;
7160 
7161 	locks_init_lock(fl);
7162 
7163 	fl->c.flc_owner = f;
7164 	fl->c.flc_pid = current->tgid;
7165 	fl->c.flc_file = f;
7166 	fl->c.flc_flags = FL_POSIX;
7167 	fl->fl_ops = NULL;
7168 	fl->fl_lmops = NULL;
7169 
7170 out:
7171 	return fl;
7172 }
7173 
smb2_set_flock_flags(struct file_lock * flock,int flags)7174 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7175 {
7176 	int cmd = -EINVAL;
7177 
7178 	/* Checking for wrong flag combination during lock request*/
7179 	switch (flags) {
7180 	case SMB2_LOCKFLAG_SHARED:
7181 		ksmbd_debug(SMB, "received shared request\n");
7182 		cmd = F_SETLKW;
7183 		flock->c.flc_type = F_RDLCK;
7184 		flock->c.flc_flags |= FL_SLEEP;
7185 		break;
7186 	case SMB2_LOCKFLAG_EXCLUSIVE:
7187 		ksmbd_debug(SMB, "received exclusive request\n");
7188 		cmd = F_SETLKW;
7189 		flock->c.flc_type = F_WRLCK;
7190 		flock->c.flc_flags |= FL_SLEEP;
7191 		break;
7192 	case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7193 		ksmbd_debug(SMB,
7194 			    "received shared & fail immediately request\n");
7195 		cmd = F_SETLK;
7196 		flock->c.flc_type = F_RDLCK;
7197 		break;
7198 	case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7199 		ksmbd_debug(SMB,
7200 			    "received exclusive & fail immediately request\n");
7201 		cmd = F_SETLK;
7202 		flock->c.flc_type = F_WRLCK;
7203 		break;
7204 	case SMB2_LOCKFLAG_UNLOCK:
7205 		ksmbd_debug(SMB, "received unlock request\n");
7206 		flock->c.flc_type = F_UNLCK;
7207 		cmd = F_SETLK;
7208 		break;
7209 	}
7210 
7211 	return cmd;
7212 }
7213 
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)7214 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7215 					 unsigned int cmd, int flags,
7216 					 struct list_head *lock_list)
7217 {
7218 	struct ksmbd_lock *lock;
7219 
7220 	lock = kzalloc(sizeof(struct ksmbd_lock), KSMBD_DEFAULT_GFP);
7221 	if (!lock)
7222 		return NULL;
7223 
7224 	lock->cmd = cmd;
7225 	lock->fl = flock;
7226 	lock->start = flock->fl_start;
7227 	lock->end = flock->fl_end;
7228 	lock->flags = flags;
7229 	if (lock->start == lock->end)
7230 		lock->zero_len = 1;
7231 	INIT_LIST_HEAD(&lock->clist);
7232 	INIT_LIST_HEAD(&lock->flist);
7233 	INIT_LIST_HEAD(&lock->llist);
7234 	list_add_tail(&lock->llist, lock_list);
7235 
7236 	return lock;
7237 }
7238 
smb2_remove_blocked_lock(void ** argv)7239 static void smb2_remove_blocked_lock(void **argv)
7240 {
7241 	struct file_lock *flock = (struct file_lock *)argv[0];
7242 
7243 	ksmbd_vfs_posix_lock_unblock(flock);
7244 	locks_wake_up(flock);
7245 }
7246 
lock_defer_pending(struct file_lock * fl)7247 static inline bool lock_defer_pending(struct file_lock *fl)
7248 {
7249 	/* check pending lock waiters */
7250 	return waitqueue_active(&fl->c.flc_wait);
7251 }
7252 
7253 /**
7254  * smb2_lock() - handler for smb2 file lock command
7255  * @work:	smb work containing lock command buffer
7256  *
7257  * Return:	0 on success, otherwise error
7258  */
smb2_lock(struct ksmbd_work * work)7259 int smb2_lock(struct ksmbd_work *work)
7260 {
7261 	struct smb2_lock_req *req;
7262 	struct smb2_lock_rsp *rsp;
7263 	struct smb2_lock_element *lock_ele;
7264 	struct ksmbd_file *fp = NULL;
7265 	struct file_lock *flock = NULL;
7266 	struct file *filp = NULL;
7267 	int lock_count;
7268 	int flags = 0;
7269 	int cmd = 0;
7270 	int err = -EIO, i, rc = 0;
7271 	u64 lock_start, lock_length;
7272 	struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7273 	struct ksmbd_conn *conn;
7274 	int nolock = 0;
7275 	LIST_HEAD(lock_list);
7276 	LIST_HEAD(rollback_list);
7277 	int prior_lock = 0;
7278 
7279 	WORK_BUFFERS(work, req, rsp);
7280 
7281 	ksmbd_debug(SMB, "Received smb2 lock request\n");
7282 	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7283 	if (!fp) {
7284 		ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7285 		err = -ENOENT;
7286 		goto out2;
7287 	}
7288 
7289 	filp = fp->filp;
7290 	lock_count = le16_to_cpu(req->LockCount);
7291 	lock_ele = req->locks;
7292 
7293 	ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7294 	if (!lock_count) {
7295 		err = -EINVAL;
7296 		goto out2;
7297 	}
7298 
7299 	for (i = 0; i < lock_count; i++) {
7300 		flags = le32_to_cpu(lock_ele[i].Flags);
7301 
7302 		flock = smb_flock_init(filp);
7303 		if (!flock)
7304 			goto out;
7305 
7306 		cmd = smb2_set_flock_flags(flock, flags);
7307 
7308 		lock_start = le64_to_cpu(lock_ele[i].Offset);
7309 		lock_length = le64_to_cpu(lock_ele[i].Length);
7310 		if (lock_start > U64_MAX - lock_length) {
7311 			pr_err("Invalid lock range requested\n");
7312 			rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7313 			locks_free_lock(flock);
7314 			goto out;
7315 		}
7316 
7317 		if (lock_start > OFFSET_MAX)
7318 			flock->fl_start = OFFSET_MAX;
7319 		else
7320 			flock->fl_start = lock_start;
7321 
7322 		lock_length = le64_to_cpu(lock_ele[i].Length);
7323 		if (lock_length > OFFSET_MAX - flock->fl_start)
7324 			lock_length = OFFSET_MAX - flock->fl_start;
7325 
7326 		flock->fl_end = flock->fl_start + lock_length;
7327 
7328 		if (flock->fl_end < flock->fl_start) {
7329 			ksmbd_debug(SMB,
7330 				    "the end offset(%llx) is smaller than the start offset(%llx)\n",
7331 				    flock->fl_end, flock->fl_start);
7332 			rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7333 			locks_free_lock(flock);
7334 			goto out;
7335 		}
7336 
7337 		/* Check conflict locks in one request */
7338 		list_for_each_entry(cmp_lock, &lock_list, llist) {
7339 			if (cmp_lock->fl->fl_start <= flock->fl_start &&
7340 			    cmp_lock->fl->fl_end >= flock->fl_end) {
7341 				if (cmp_lock->fl->c.flc_type != F_UNLCK &&
7342 				    flock->c.flc_type != F_UNLCK) {
7343 					pr_err("conflict two locks in one request\n");
7344 					err = -EINVAL;
7345 					locks_free_lock(flock);
7346 					goto out;
7347 				}
7348 			}
7349 		}
7350 
7351 		smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7352 		if (!smb_lock) {
7353 			err = -EINVAL;
7354 			locks_free_lock(flock);
7355 			goto out;
7356 		}
7357 	}
7358 
7359 	list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7360 		if (smb_lock->cmd < 0) {
7361 			err = -EINVAL;
7362 			goto out;
7363 		}
7364 
7365 		if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7366 			err = -EINVAL;
7367 			goto out;
7368 		}
7369 
7370 		if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7371 		     smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7372 		    (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7373 		     !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7374 			err = -EINVAL;
7375 			goto out;
7376 		}
7377 
7378 		prior_lock = smb_lock->flags;
7379 
7380 		if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7381 		    !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7382 			goto no_check_cl;
7383 
7384 		nolock = 1;
7385 		/* check locks in connection list */
7386 		down_read(&conn_list_lock);
7387 		list_for_each_entry(conn, &conn_list, conns_list) {
7388 			spin_lock(&conn->llist_lock);
7389 			list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7390 				if (file_inode(cmp_lock->fl->c.flc_file) !=
7391 				    file_inode(smb_lock->fl->c.flc_file))
7392 					continue;
7393 
7394 				if (lock_is_unlock(smb_lock->fl)) {
7395 					if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&
7396 					    cmp_lock->start == smb_lock->start &&
7397 					    cmp_lock->end == smb_lock->end &&
7398 					    !lock_defer_pending(cmp_lock->fl)) {
7399 						nolock = 0;
7400 						list_del(&cmp_lock->flist);
7401 						list_del(&cmp_lock->clist);
7402 						spin_unlock(&conn->llist_lock);
7403 						up_read(&conn_list_lock);
7404 
7405 						locks_free_lock(cmp_lock->fl);
7406 						kfree(cmp_lock);
7407 						goto out_check_cl;
7408 					}
7409 					continue;
7410 				}
7411 
7412 				if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {
7413 					if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7414 						continue;
7415 				} else {
7416 					if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7417 						continue;
7418 				}
7419 
7420 				/* check zero byte lock range */
7421 				if (cmp_lock->zero_len && !smb_lock->zero_len &&
7422 				    cmp_lock->start > smb_lock->start &&
7423 				    cmp_lock->start < smb_lock->end) {
7424 					spin_unlock(&conn->llist_lock);
7425 					up_read(&conn_list_lock);
7426 					pr_err("previous lock conflict with zero byte lock range\n");
7427 					goto out;
7428 				}
7429 
7430 				if (smb_lock->zero_len && !cmp_lock->zero_len &&
7431 				    smb_lock->start > cmp_lock->start &&
7432 				    smb_lock->start < cmp_lock->end) {
7433 					spin_unlock(&conn->llist_lock);
7434 					up_read(&conn_list_lock);
7435 					pr_err("current lock conflict with zero byte lock range\n");
7436 					goto out;
7437 				}
7438 
7439 				if (((cmp_lock->start <= smb_lock->start &&
7440 				      cmp_lock->end > smb_lock->start) ||
7441 				     (cmp_lock->start < smb_lock->end &&
7442 				      cmp_lock->end >= smb_lock->end)) &&
7443 				    !cmp_lock->zero_len && !smb_lock->zero_len) {
7444 					spin_unlock(&conn->llist_lock);
7445 					up_read(&conn_list_lock);
7446 					pr_err("Not allow lock operation on exclusive lock range\n");
7447 					goto out;
7448 				}
7449 			}
7450 			spin_unlock(&conn->llist_lock);
7451 		}
7452 		up_read(&conn_list_lock);
7453 out_check_cl:
7454 		if (lock_is_unlock(smb_lock->fl) && nolock) {
7455 			pr_err("Try to unlock nolocked range\n");
7456 			rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7457 			goto out;
7458 		}
7459 
7460 no_check_cl:
7461 		flock = smb_lock->fl;
7462 		list_del(&smb_lock->llist);
7463 
7464 		if (smb_lock->zero_len) {
7465 			err = 0;
7466 			goto skip;
7467 		}
7468 retry:
7469 		rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7470 skip:
7471 		if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) {
7472 			if (!rc) {
7473 				ksmbd_debug(SMB, "File unlocked\n");
7474 			} else if (rc == -ENOENT) {
7475 				rsp->hdr.Status = STATUS_NOT_LOCKED;
7476 				goto out;
7477 			}
7478 			locks_free_lock(flock);
7479 			kfree(smb_lock);
7480 		} else {
7481 			if (rc == FILE_LOCK_DEFERRED) {
7482 				void **argv;
7483 
7484 				ksmbd_debug(SMB,
7485 					    "would have to wait for getting lock\n");
7486 				list_add(&smb_lock->llist, &rollback_list);
7487 
7488 				argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP);
7489 				if (!argv) {
7490 					err = -ENOMEM;
7491 					goto out;
7492 				}
7493 				argv[0] = flock;
7494 
7495 				rc = setup_async_work(work,
7496 						      smb2_remove_blocked_lock,
7497 						      argv);
7498 				if (rc) {
7499 					kfree(argv);
7500 					err = -ENOMEM;
7501 					goto out;
7502 				}
7503 				spin_lock(&fp->f_lock);
7504 				list_add(&work->fp_entry, &fp->blocked_works);
7505 				spin_unlock(&fp->f_lock);
7506 
7507 				smb2_send_interim_resp(work, STATUS_PENDING);
7508 
7509 				ksmbd_vfs_posix_lock_wait(flock);
7510 
7511 				spin_lock(&fp->f_lock);
7512 				list_del(&work->fp_entry);
7513 				spin_unlock(&fp->f_lock);
7514 
7515 				if (work->state != KSMBD_WORK_ACTIVE) {
7516 					list_del(&smb_lock->llist);
7517 					locks_free_lock(flock);
7518 
7519 					if (work->state == KSMBD_WORK_CANCELLED) {
7520 						rsp->hdr.Status =
7521 							STATUS_CANCELLED;
7522 						kfree(smb_lock);
7523 						smb2_send_interim_resp(work,
7524 								       STATUS_CANCELLED);
7525 						work->send_no_response = 1;
7526 						goto out;
7527 					}
7528 
7529 					rsp->hdr.Status =
7530 						STATUS_RANGE_NOT_LOCKED;
7531 					kfree(smb_lock);
7532 					goto out2;
7533 				}
7534 
7535 				list_del(&smb_lock->llist);
7536 				release_async_work(work);
7537 				goto retry;
7538 			} else if (!rc) {
7539 				list_add(&smb_lock->llist, &rollback_list);
7540 				spin_lock(&work->conn->llist_lock);
7541 				list_add_tail(&smb_lock->clist,
7542 					      &work->conn->lock_list);
7543 				list_add_tail(&smb_lock->flist,
7544 					      &fp->lock_list);
7545 				spin_unlock(&work->conn->llist_lock);
7546 				ksmbd_debug(SMB, "successful in taking lock\n");
7547 			} else {
7548 				goto out;
7549 			}
7550 		}
7551 	}
7552 
7553 	if (atomic_read(&fp->f_ci->op_count) > 1)
7554 		smb_break_all_oplock(work, fp);
7555 
7556 	rsp->StructureSize = cpu_to_le16(4);
7557 	ksmbd_debug(SMB, "successful in taking lock\n");
7558 	rsp->hdr.Status = STATUS_SUCCESS;
7559 	rsp->Reserved = 0;
7560 	err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7561 	if (err)
7562 		goto out;
7563 
7564 	ksmbd_fd_put(work, fp);
7565 	return 0;
7566 
7567 out:
7568 	list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7569 		locks_free_lock(smb_lock->fl);
7570 		list_del(&smb_lock->llist);
7571 		kfree(smb_lock);
7572 	}
7573 
7574 	list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7575 		struct file_lock *rlock = NULL;
7576 
7577 		rlock = smb_flock_init(filp);
7578 		rlock->c.flc_type = F_UNLCK;
7579 		rlock->fl_start = smb_lock->start;
7580 		rlock->fl_end = smb_lock->end;
7581 
7582 		rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7583 		if (rc)
7584 			pr_err("rollback unlock fail : %d\n", rc);
7585 
7586 		list_del(&smb_lock->llist);
7587 		spin_lock(&work->conn->llist_lock);
7588 		if (!list_empty(&smb_lock->flist))
7589 			list_del(&smb_lock->flist);
7590 		list_del(&smb_lock->clist);
7591 		spin_unlock(&work->conn->llist_lock);
7592 
7593 		locks_free_lock(smb_lock->fl);
7594 		locks_free_lock(rlock);
7595 		kfree(smb_lock);
7596 	}
7597 out2:
7598 	ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7599 
7600 	if (!rsp->hdr.Status) {
7601 		if (err == -EINVAL)
7602 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7603 		else if (err == -ENOMEM)
7604 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7605 		else if (err == -ENOENT)
7606 			rsp->hdr.Status = STATUS_FILE_CLOSED;
7607 		else
7608 			rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7609 	}
7610 
7611 	smb2_set_err_rsp(work);
7612 	ksmbd_fd_put(work, fp);
7613 	return err;
7614 }
7615 
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)7616 static int fsctl_copychunk(struct ksmbd_work *work,
7617 			   struct copychunk_ioctl_req *ci_req,
7618 			   unsigned int cnt_code,
7619 			   unsigned int input_count,
7620 			   unsigned long long volatile_id,
7621 			   unsigned long long persistent_id,
7622 			   struct smb2_ioctl_rsp *rsp)
7623 {
7624 	struct copychunk_ioctl_rsp *ci_rsp;
7625 	struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7626 	struct srv_copychunk *chunks;
7627 	unsigned int i, chunk_count, chunk_count_written = 0;
7628 	unsigned int chunk_size_written = 0;
7629 	loff_t total_size_written = 0;
7630 	int ret = 0;
7631 
7632 	ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7633 
7634 	rsp->VolatileFileId = volatile_id;
7635 	rsp->PersistentFileId = persistent_id;
7636 	ci_rsp->ChunksWritten =
7637 		cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7638 	ci_rsp->ChunkBytesWritten =
7639 		cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7640 	ci_rsp->TotalBytesWritten =
7641 		cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7642 
7643 	chunk_count = le32_to_cpu(ci_req->ChunkCount);
7644 	if (chunk_count == 0)
7645 		goto out;
7646 	total_size_written = 0;
7647 
7648 	/* verify the SRV_COPYCHUNK_COPY packet */
7649 	if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7650 	    input_count < struct_size(ci_req, Chunks, chunk_count)) {
7651 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7652 		return -EINVAL;
7653 	}
7654 
7655 	chunks = &ci_req->Chunks[0];
7656 	for (i = 0; i < chunk_count; i++) {
7657 		if (le32_to_cpu(chunks[i].Length) == 0 ||
7658 		    le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7659 			break;
7660 		total_size_written += le32_to_cpu(chunks[i].Length);
7661 	}
7662 
7663 	if (i < chunk_count ||
7664 	    total_size_written > ksmbd_server_side_copy_max_total_size()) {
7665 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7666 		return -EINVAL;
7667 	}
7668 
7669 	src_fp = ksmbd_lookup_foreign_fd(work,
7670 					 le64_to_cpu(ci_req->ResumeKey[0]));
7671 	dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7672 	ret = -EINVAL;
7673 	if (!src_fp ||
7674 	    src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7675 		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7676 		goto out;
7677 	}
7678 
7679 	if (!dst_fp) {
7680 		rsp->hdr.Status = STATUS_FILE_CLOSED;
7681 		goto out;
7682 	}
7683 
7684 	/*
7685 	 * FILE_READ_DATA should only be included in
7686 	 * the FSCTL_COPYCHUNK case
7687 	 */
7688 	if (cnt_code == FSCTL_COPYCHUNK &&
7689 	    !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7690 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
7691 		goto out;
7692 	}
7693 
7694 	ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7695 					 chunks, chunk_count,
7696 					 &chunk_count_written,
7697 					 &chunk_size_written,
7698 					 &total_size_written);
7699 	if (ret < 0) {
7700 		if (ret == -EACCES)
7701 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
7702 		if (ret == -EAGAIN)
7703 			rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7704 		else if (ret == -EBADF)
7705 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
7706 		else if (ret == -EFBIG || ret == -ENOSPC)
7707 			rsp->hdr.Status = STATUS_DISK_FULL;
7708 		else if (ret == -EINVAL)
7709 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7710 		else if (ret == -EISDIR)
7711 			rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7712 		else if (ret == -E2BIG)
7713 			rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7714 		else
7715 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7716 	}
7717 
7718 	ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7719 	ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7720 	ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7721 out:
7722 	ksmbd_fd_put(work, src_fp);
7723 	ksmbd_fd_put(work, dst_fp);
7724 	return ret;
7725 }
7726 
idev_ipv4_address(struct in_device * idev)7727 static __be32 idev_ipv4_address(struct in_device *idev)
7728 {
7729 	__be32 addr = 0;
7730 
7731 	struct in_ifaddr *ifa;
7732 
7733 	rcu_read_lock();
7734 	in_dev_for_each_ifa_rcu(ifa, idev) {
7735 		if (ifa->ifa_flags & IFA_F_SECONDARY)
7736 			continue;
7737 
7738 		addr = ifa->ifa_address;
7739 		break;
7740 	}
7741 	rcu_read_unlock();
7742 	return addr;
7743 }
7744 
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7745 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7746 					struct smb2_ioctl_rsp *rsp,
7747 					unsigned int out_buf_len)
7748 {
7749 	struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7750 	int nbytes = 0;
7751 	struct net_device *netdev;
7752 	struct sockaddr_storage_rsp *sockaddr_storage;
7753 	unsigned int flags;
7754 	unsigned long long speed;
7755 
7756 	rtnl_lock();
7757 	for_each_netdev(&init_net, netdev) {
7758 		bool ipv4_set = false;
7759 
7760 		if (netdev->type == ARPHRD_LOOPBACK)
7761 			continue;
7762 
7763 		if (!ksmbd_find_netdev_name_iface_list(netdev->name))
7764 			continue;
7765 
7766 		flags = dev_get_flags(netdev);
7767 		if (!(flags & IFF_RUNNING))
7768 			continue;
7769 ipv6_retry:
7770 		if (out_buf_len <
7771 		    nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7772 			rtnl_unlock();
7773 			return -ENOSPC;
7774 		}
7775 
7776 		nii_rsp = (struct network_interface_info_ioctl_rsp *)
7777 				&rsp->Buffer[nbytes];
7778 		nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7779 
7780 		nii_rsp->Capability = 0;
7781 		if (netdev->real_num_tx_queues > 1)
7782 			nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7783 		if (ksmbd_rdma_capable_netdev(netdev))
7784 			nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7785 
7786 		nii_rsp->Next = cpu_to_le32(152);
7787 		nii_rsp->Reserved = 0;
7788 
7789 		if (netdev->ethtool_ops->get_link_ksettings) {
7790 			struct ethtool_link_ksettings cmd;
7791 
7792 			netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7793 			speed = cmd.base.speed;
7794 		} else {
7795 			ksmbd_debug(SMB, "%s %s\n", netdev->name,
7796 				    "speed is unknown, defaulting to 1Gb/sec");
7797 			speed = SPEED_1000;
7798 		}
7799 
7800 		speed *= 1000000;
7801 		nii_rsp->LinkSpeed = cpu_to_le64(speed);
7802 
7803 		sockaddr_storage = (struct sockaddr_storage_rsp *)
7804 					nii_rsp->SockAddr_Storage;
7805 		memset(sockaddr_storage, 0, 128);
7806 
7807 		if (!ipv4_set) {
7808 			struct in_device *idev;
7809 
7810 			sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7811 			sockaddr_storage->addr4.Port = 0;
7812 
7813 			idev = __in_dev_get_rtnl(netdev);
7814 			if (!idev)
7815 				continue;
7816 			sockaddr_storage->addr4.IPv4address =
7817 						idev_ipv4_address(idev);
7818 			nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7819 			ipv4_set = true;
7820 			goto ipv6_retry;
7821 		} else {
7822 			struct inet6_dev *idev6;
7823 			struct inet6_ifaddr *ifa;
7824 			__u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7825 
7826 			sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7827 			sockaddr_storage->addr6.Port = 0;
7828 			sockaddr_storage->addr6.FlowInfo = 0;
7829 
7830 			idev6 = __in6_dev_get(netdev);
7831 			if (!idev6)
7832 				continue;
7833 
7834 			list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7835 				if (ifa->flags & (IFA_F_TENTATIVE |
7836 							IFA_F_DEPRECATED))
7837 					continue;
7838 				memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7839 				break;
7840 			}
7841 			sockaddr_storage->addr6.ScopeId = 0;
7842 			nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7843 		}
7844 	}
7845 	rtnl_unlock();
7846 
7847 	/* zero if this is last one */
7848 	if (nii_rsp)
7849 		nii_rsp->Next = 0;
7850 
7851 	rsp->PersistentFileId = SMB2_NO_FID;
7852 	rsp->VolatileFileId = SMB2_NO_FID;
7853 	return nbytes;
7854 }
7855 
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)7856 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7857 					 struct validate_negotiate_info_req *neg_req,
7858 					 struct validate_negotiate_info_rsp *neg_rsp,
7859 					 unsigned int in_buf_len)
7860 {
7861 	int ret = 0;
7862 	int dialect;
7863 
7864 	if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7865 			le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7866 		return -EINVAL;
7867 
7868 	dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7869 					     neg_req->DialectCount);
7870 	if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7871 		ret = -EINVAL;
7872 		goto err_out;
7873 	}
7874 
7875 	if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7876 		ret = -EINVAL;
7877 		goto err_out;
7878 	}
7879 
7880 	if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7881 		ret = -EINVAL;
7882 		goto err_out;
7883 	}
7884 
7885 	if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7886 		ret = -EINVAL;
7887 		goto err_out;
7888 	}
7889 
7890 	neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7891 	memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7892 	neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7893 	neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7894 err_out:
7895 	return ret;
7896 }
7897 
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)7898 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7899 					struct file_allocated_range_buffer *qar_req,
7900 					struct file_allocated_range_buffer *qar_rsp,
7901 					unsigned int in_count, unsigned int *out_count)
7902 {
7903 	struct ksmbd_file *fp;
7904 	loff_t start, length;
7905 	int ret = 0;
7906 
7907 	*out_count = 0;
7908 	if (in_count == 0)
7909 		return -EINVAL;
7910 
7911 	start = le64_to_cpu(qar_req->file_offset);
7912 	length = le64_to_cpu(qar_req->length);
7913 
7914 	if (start < 0 || length < 0)
7915 		return -EINVAL;
7916 
7917 	fp = ksmbd_lookup_fd_fast(work, id);
7918 	if (!fp)
7919 		return -ENOENT;
7920 
7921 	ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7922 				   qar_rsp, in_count, out_count);
7923 	if (ret && ret != -E2BIG)
7924 		*out_count = 0;
7925 
7926 	ksmbd_fd_put(work, fp);
7927 	return ret;
7928 }
7929 
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7930 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7931 				 unsigned int out_buf_len,
7932 				 struct smb2_ioctl_req *req,
7933 				 struct smb2_ioctl_rsp *rsp)
7934 {
7935 	struct ksmbd_rpc_command *rpc_resp;
7936 	char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7937 	int nbytes = 0;
7938 
7939 	rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7940 				   le32_to_cpu(req->InputCount));
7941 	if (rpc_resp) {
7942 		if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7943 			/*
7944 			 * set STATUS_SOME_NOT_MAPPED response
7945 			 * for unknown domain sid.
7946 			 */
7947 			rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7948 		} else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7949 			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7950 			goto out;
7951 		} else if (rpc_resp->flags != KSMBD_RPC_OK) {
7952 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7953 			goto out;
7954 		}
7955 
7956 		nbytes = rpc_resp->payload_sz;
7957 		if (rpc_resp->payload_sz > out_buf_len) {
7958 			rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7959 			nbytes = out_buf_len;
7960 		}
7961 
7962 		if (!rpc_resp->payload_sz) {
7963 			rsp->hdr.Status =
7964 				STATUS_UNEXPECTED_IO_ERROR;
7965 			goto out;
7966 		}
7967 
7968 		memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7969 	}
7970 out:
7971 	kvfree(rpc_resp);
7972 	return nbytes;
7973 }
7974 
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7975 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7976 				   struct file_sparse *sparse)
7977 {
7978 	struct ksmbd_file *fp;
7979 	struct mnt_idmap *idmap;
7980 	int ret = 0;
7981 	__le32 old_fattr;
7982 
7983 	fp = ksmbd_lookup_fd_fast(work, id);
7984 	if (!fp)
7985 		return -ENOENT;
7986 	idmap = file_mnt_idmap(fp->filp);
7987 
7988 	old_fattr = fp->f_ci->m_fattr;
7989 	if (sparse->SetSparse)
7990 		fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7991 	else
7992 		fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7993 
7994 	if (fp->f_ci->m_fattr != old_fattr &&
7995 	    test_share_config_flag(work->tcon->share_conf,
7996 				   KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7997 		struct xattr_dos_attrib da;
7998 
7999 		ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
8000 						     fp->filp->f_path.dentry, &da);
8001 		if (ret <= 0)
8002 			goto out;
8003 
8004 		da.attr = le32_to_cpu(fp->f_ci->m_fattr);
8005 		ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
8006 						     &fp->filp->f_path,
8007 						     &da, true);
8008 		if (ret)
8009 			fp->f_ci->m_fattr = old_fattr;
8010 	}
8011 
8012 out:
8013 	ksmbd_fd_put(work, fp);
8014 	return ret;
8015 }
8016 
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)8017 static int fsctl_request_resume_key(struct ksmbd_work *work,
8018 				    struct smb2_ioctl_req *req,
8019 				    struct resume_key_ioctl_rsp *key_rsp)
8020 {
8021 	struct ksmbd_file *fp;
8022 
8023 	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
8024 	if (!fp)
8025 		return -ENOENT;
8026 
8027 	memset(key_rsp, 0, sizeof(*key_rsp));
8028 	key_rsp->ResumeKey[0] = req->VolatileFileId;
8029 	key_rsp->ResumeKey[1] = req->PersistentFileId;
8030 	ksmbd_fd_put(work, fp);
8031 
8032 	return 0;
8033 }
8034 
8035 /**
8036  * smb2_ioctl() - handler for smb2 ioctl command
8037  * @work:	smb work containing ioctl command buffer
8038  *
8039  * Return:	0 on success, otherwise error
8040  */
smb2_ioctl(struct ksmbd_work * work)8041 int smb2_ioctl(struct ksmbd_work *work)
8042 {
8043 	struct smb2_ioctl_req *req;
8044 	struct smb2_ioctl_rsp *rsp;
8045 	unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
8046 	u64 id = KSMBD_NO_FID;
8047 	struct ksmbd_conn *conn = work->conn;
8048 	int ret = 0;
8049 	char *buffer;
8050 
8051 	ksmbd_debug(SMB, "Received smb2 ioctl request\n");
8052 
8053 	if (work->next_smb2_rcv_hdr_off) {
8054 		req = ksmbd_req_buf_next(work);
8055 		rsp = ksmbd_resp_buf_next(work);
8056 		if (!has_file_id(req->VolatileFileId)) {
8057 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
8058 				    work->compound_fid);
8059 			id = work->compound_fid;
8060 		}
8061 	} else {
8062 		req = smb2_get_msg(work->request_buf);
8063 		rsp = smb2_get_msg(work->response_buf);
8064 	}
8065 
8066 	if (!has_file_id(id))
8067 		id = req->VolatileFileId;
8068 
8069 	if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
8070 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8071 		goto out;
8072 	}
8073 
8074 	buffer = (char *)req + le32_to_cpu(req->InputOffset);
8075 
8076 	cnt_code = le32_to_cpu(req->CtlCode);
8077 	ret = smb2_calc_max_out_buf_len(work, 48,
8078 					le32_to_cpu(req->MaxOutputResponse));
8079 	if (ret < 0) {
8080 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8081 		goto out;
8082 	}
8083 	out_buf_len = (unsigned int)ret;
8084 	in_buf_len = le32_to_cpu(req->InputCount);
8085 
8086 	switch (cnt_code) {
8087 	case FSCTL_DFS_GET_REFERRALS:
8088 	case FSCTL_DFS_GET_REFERRALS_EX:
8089 		/* Not support DFS yet */
8090 		rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
8091 		goto out;
8092 	case FSCTL_CREATE_OR_GET_OBJECT_ID:
8093 	{
8094 		struct file_object_buf_type1_ioctl_rsp *obj_buf;
8095 
8096 		nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
8097 		obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
8098 			&rsp->Buffer[0];
8099 
8100 		/*
8101 		 * TODO: This is dummy implementation to pass smbtorture
8102 		 * Need to check correct response later
8103 		 */
8104 		memset(obj_buf->ObjectId, 0x0, 16);
8105 		memset(obj_buf->BirthVolumeId, 0x0, 16);
8106 		memset(obj_buf->BirthObjectId, 0x0, 16);
8107 		memset(obj_buf->DomainId, 0x0, 16);
8108 
8109 		break;
8110 	}
8111 	case FSCTL_PIPE_TRANSCEIVE:
8112 		out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8113 		nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8114 		break;
8115 	case FSCTL_VALIDATE_NEGOTIATE_INFO:
8116 		if (conn->dialect < SMB30_PROT_ID) {
8117 			ret = -EOPNOTSUPP;
8118 			goto out;
8119 		}
8120 
8121 		if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8122 					  Dialects)) {
8123 			ret = -EINVAL;
8124 			goto out;
8125 		}
8126 
8127 		if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8128 			ret = -EINVAL;
8129 			goto out;
8130 		}
8131 
8132 		ret = fsctl_validate_negotiate_info(conn,
8133 			(struct validate_negotiate_info_req *)buffer,
8134 			(struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8135 			in_buf_len);
8136 		if (ret < 0)
8137 			goto out;
8138 
8139 		nbytes = sizeof(struct validate_negotiate_info_rsp);
8140 		rsp->PersistentFileId = SMB2_NO_FID;
8141 		rsp->VolatileFileId = SMB2_NO_FID;
8142 		break;
8143 	case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8144 		ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8145 		if (ret < 0)
8146 			goto out;
8147 		nbytes = ret;
8148 		break;
8149 	case FSCTL_REQUEST_RESUME_KEY:
8150 		if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8151 			ret = -EINVAL;
8152 			goto out;
8153 		}
8154 
8155 		ret = fsctl_request_resume_key(work, req,
8156 					       (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8157 		if (ret < 0)
8158 			goto out;
8159 		rsp->PersistentFileId = req->PersistentFileId;
8160 		rsp->VolatileFileId = req->VolatileFileId;
8161 		nbytes = sizeof(struct resume_key_ioctl_rsp);
8162 		break;
8163 	case FSCTL_COPYCHUNK:
8164 	case FSCTL_COPYCHUNK_WRITE:
8165 		if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8166 			ksmbd_debug(SMB,
8167 				    "User does not have write permission\n");
8168 			ret = -EACCES;
8169 			goto out;
8170 		}
8171 
8172 		if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) {
8173 			ret = -EINVAL;
8174 			goto out;
8175 		}
8176 
8177 		if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8178 			ret = -EINVAL;
8179 			goto out;
8180 		}
8181 
8182 		nbytes = sizeof(struct copychunk_ioctl_rsp);
8183 		rsp->VolatileFileId = req->VolatileFileId;
8184 		rsp->PersistentFileId = req->PersistentFileId;
8185 		fsctl_copychunk(work,
8186 				(struct copychunk_ioctl_req *)buffer,
8187 				le32_to_cpu(req->CtlCode),
8188 				le32_to_cpu(req->InputCount),
8189 				req->VolatileFileId,
8190 				req->PersistentFileId,
8191 				rsp);
8192 		break;
8193 	case FSCTL_SET_SPARSE:
8194 		if (in_buf_len < sizeof(struct file_sparse)) {
8195 			ret = -EINVAL;
8196 			goto out;
8197 		}
8198 
8199 		ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8200 		if (ret < 0)
8201 			goto out;
8202 		break;
8203 	case FSCTL_SET_ZERO_DATA:
8204 	{
8205 		struct file_zero_data_information *zero_data;
8206 		struct ksmbd_file *fp;
8207 		loff_t off, len, bfz;
8208 
8209 		if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8210 			ksmbd_debug(SMB,
8211 				    "User does not have write permission\n");
8212 			ret = -EACCES;
8213 			goto out;
8214 		}
8215 
8216 		if (in_buf_len < sizeof(struct file_zero_data_information)) {
8217 			ret = -EINVAL;
8218 			goto out;
8219 		}
8220 
8221 		zero_data =
8222 			(struct file_zero_data_information *)buffer;
8223 
8224 		off = le64_to_cpu(zero_data->FileOffset);
8225 		bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8226 		if (off < 0 || bfz < 0 || off > bfz) {
8227 			ret = -EINVAL;
8228 			goto out;
8229 		}
8230 
8231 		len = bfz - off;
8232 		if (len) {
8233 			fp = ksmbd_lookup_fd_fast(work, id);
8234 			if (!fp) {
8235 				ret = -ENOENT;
8236 				goto out;
8237 			}
8238 
8239 			ret = ksmbd_vfs_zero_data(work, fp, off, len);
8240 			ksmbd_fd_put(work, fp);
8241 			if (ret < 0)
8242 				goto out;
8243 		}
8244 		break;
8245 	}
8246 	case FSCTL_QUERY_ALLOCATED_RANGES:
8247 		if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8248 			ret = -EINVAL;
8249 			goto out;
8250 		}
8251 
8252 		ret = fsctl_query_allocated_ranges(work, id,
8253 			(struct file_allocated_range_buffer *)buffer,
8254 			(struct file_allocated_range_buffer *)&rsp->Buffer[0],
8255 			out_buf_len /
8256 			sizeof(struct file_allocated_range_buffer), &nbytes);
8257 		if (ret == -E2BIG) {
8258 			rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8259 		} else if (ret < 0) {
8260 			nbytes = 0;
8261 			goto out;
8262 		}
8263 
8264 		nbytes *= sizeof(struct file_allocated_range_buffer);
8265 		break;
8266 	case FSCTL_GET_REPARSE_POINT:
8267 	{
8268 		struct reparse_data_buffer *reparse_ptr;
8269 		struct ksmbd_file *fp;
8270 
8271 		reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8272 		fp = ksmbd_lookup_fd_fast(work, id);
8273 		if (!fp) {
8274 			pr_err("not found fp!!\n");
8275 			ret = -ENOENT;
8276 			goto out;
8277 		}
8278 
8279 		reparse_ptr->ReparseTag =
8280 			smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8281 		reparse_ptr->ReparseDataLength = 0;
8282 		ksmbd_fd_put(work, fp);
8283 		nbytes = sizeof(struct reparse_data_buffer);
8284 		break;
8285 	}
8286 	case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8287 	{
8288 		struct ksmbd_file *fp_in, *fp_out = NULL;
8289 		struct duplicate_extents_to_file *dup_ext;
8290 		loff_t src_off, dst_off, length, cloned;
8291 
8292 		if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8293 			ret = -EINVAL;
8294 			goto out;
8295 		}
8296 
8297 		dup_ext = (struct duplicate_extents_to_file *)buffer;
8298 
8299 		fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8300 					     dup_ext->PersistentFileHandle);
8301 		if (!fp_in) {
8302 			pr_err("not found file handle in duplicate extent to file\n");
8303 			ret = -ENOENT;
8304 			goto out;
8305 		}
8306 
8307 		fp_out = ksmbd_lookup_fd_fast(work, id);
8308 		if (!fp_out) {
8309 			pr_err("not found fp\n");
8310 			ret = -ENOENT;
8311 			goto dup_ext_out;
8312 		}
8313 
8314 		src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8315 		dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8316 		length = le64_to_cpu(dup_ext->ByteCount);
8317 		/*
8318 		 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8319 		 * should fall back to vfs_copy_file_range().  This could be
8320 		 * beneficial when re-exporting nfs/smb mount, but note that
8321 		 * this can result in partial copy that returns an error status.
8322 		 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8323 		 * fall back to vfs_copy_file_range(), should be avoided when
8324 		 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8325 		 */
8326 		cloned = vfs_clone_file_range(fp_in->filp, src_off,
8327 					      fp_out->filp, dst_off, length, 0);
8328 		if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8329 			ret = -EOPNOTSUPP;
8330 			goto dup_ext_out;
8331 		} else if (cloned != length) {
8332 			cloned = vfs_copy_file_range(fp_in->filp, src_off,
8333 						     fp_out->filp, dst_off,
8334 						     length, 0);
8335 			if (cloned != length) {
8336 				if (cloned < 0)
8337 					ret = cloned;
8338 				else
8339 					ret = -EINVAL;
8340 			}
8341 		}
8342 
8343 dup_ext_out:
8344 		ksmbd_fd_put(work, fp_in);
8345 		ksmbd_fd_put(work, fp_out);
8346 		if (ret < 0)
8347 			goto out;
8348 		break;
8349 	}
8350 	default:
8351 		ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8352 			    cnt_code);
8353 		ret = -EOPNOTSUPP;
8354 		goto out;
8355 	}
8356 
8357 	rsp->CtlCode = cpu_to_le32(cnt_code);
8358 	rsp->InputCount = cpu_to_le32(0);
8359 	rsp->InputOffset = cpu_to_le32(112);
8360 	rsp->OutputOffset = cpu_to_le32(112);
8361 	rsp->OutputCount = cpu_to_le32(nbytes);
8362 	rsp->StructureSize = cpu_to_le16(49);
8363 	rsp->Reserved = cpu_to_le16(0);
8364 	rsp->Flags = cpu_to_le32(0);
8365 	rsp->Reserved2 = cpu_to_le32(0);
8366 	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8367 	if (!ret)
8368 		return ret;
8369 
8370 out:
8371 	if (ret == -EACCES)
8372 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
8373 	else if (ret == -ENOENT)
8374 		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8375 	else if (ret == -EOPNOTSUPP)
8376 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8377 	else if (ret == -ENOSPC)
8378 		rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8379 	else if (ret < 0 || rsp->hdr.Status == 0)
8380 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8381 	smb2_set_err_rsp(work);
8382 	return 0;
8383 }
8384 
8385 /**
8386  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8387  * @work:	smb work containing oplock break command buffer
8388  *
8389  * Return:	0
8390  */
smb20_oplock_break_ack(struct ksmbd_work * work)8391 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8392 {
8393 	struct smb2_oplock_break *req;
8394 	struct smb2_oplock_break *rsp;
8395 	struct ksmbd_file *fp;
8396 	struct oplock_info *opinfo = NULL;
8397 	__le32 err = 0;
8398 	int ret = 0;
8399 	u64 volatile_id, persistent_id;
8400 	char req_oplevel = 0, rsp_oplevel = 0;
8401 	unsigned int oplock_change_type;
8402 
8403 	WORK_BUFFERS(work, req, rsp);
8404 
8405 	volatile_id = req->VolatileFid;
8406 	persistent_id = req->PersistentFid;
8407 	req_oplevel = req->OplockLevel;
8408 	ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8409 		    volatile_id, persistent_id, req_oplevel);
8410 
8411 	fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8412 	if (!fp) {
8413 		rsp->hdr.Status = STATUS_FILE_CLOSED;
8414 		smb2_set_err_rsp(work);
8415 		return;
8416 	}
8417 
8418 	opinfo = opinfo_get(fp);
8419 	if (!opinfo) {
8420 		pr_err("unexpected null oplock_info\n");
8421 		rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8422 		smb2_set_err_rsp(work);
8423 		ksmbd_fd_put(work, fp);
8424 		return;
8425 	}
8426 
8427 	if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8428 		rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8429 		goto err_out;
8430 	}
8431 
8432 	if (opinfo->op_state == OPLOCK_STATE_NONE) {
8433 		ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8434 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8435 		goto err_out;
8436 	}
8437 
8438 	if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8439 	     opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8440 	    (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8441 	     req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8442 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8443 		oplock_change_type = OPLOCK_WRITE_TO_NONE;
8444 	} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8445 		   req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8446 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8447 		oplock_change_type = OPLOCK_READ_TO_NONE;
8448 	} else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8449 		   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8450 		err = STATUS_INVALID_DEVICE_STATE;
8451 		if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8452 		     opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8453 		    req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8454 			oplock_change_type = OPLOCK_WRITE_TO_READ;
8455 		} else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8456 			    opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8457 			   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8458 			oplock_change_type = OPLOCK_WRITE_TO_NONE;
8459 		} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8460 			   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8461 			oplock_change_type = OPLOCK_READ_TO_NONE;
8462 		} else {
8463 			oplock_change_type = 0;
8464 		}
8465 	} else {
8466 		oplock_change_type = 0;
8467 	}
8468 
8469 	switch (oplock_change_type) {
8470 	case OPLOCK_WRITE_TO_READ:
8471 		ret = opinfo_write_to_read(opinfo);
8472 		rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8473 		break;
8474 	case OPLOCK_WRITE_TO_NONE:
8475 		ret = opinfo_write_to_none(opinfo);
8476 		rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8477 		break;
8478 	case OPLOCK_READ_TO_NONE:
8479 		ret = opinfo_read_to_none(opinfo);
8480 		rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8481 		break;
8482 	default:
8483 		pr_err("unknown oplock change 0x%x -> 0x%x\n",
8484 		       opinfo->level, rsp_oplevel);
8485 	}
8486 
8487 	if (ret < 0) {
8488 		rsp->hdr.Status = err;
8489 		goto err_out;
8490 	}
8491 
8492 	opinfo->op_state = OPLOCK_STATE_NONE;
8493 	wake_up_interruptible_all(&opinfo->oplock_q);
8494 	opinfo_put(opinfo);
8495 	ksmbd_fd_put(work, fp);
8496 
8497 	rsp->StructureSize = cpu_to_le16(24);
8498 	rsp->OplockLevel = rsp_oplevel;
8499 	rsp->Reserved = 0;
8500 	rsp->Reserved2 = 0;
8501 	rsp->VolatileFid = volatile_id;
8502 	rsp->PersistentFid = persistent_id;
8503 	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8504 	if (!ret)
8505 		return;
8506 
8507 err_out:
8508 	opinfo->op_state = OPLOCK_STATE_NONE;
8509 	wake_up_interruptible_all(&opinfo->oplock_q);
8510 
8511 	opinfo_put(opinfo);
8512 	ksmbd_fd_put(work, fp);
8513 	smb2_set_err_rsp(work);
8514 }
8515 
check_lease_state(struct lease * lease,__le32 req_state)8516 static int check_lease_state(struct lease *lease, __le32 req_state)
8517 {
8518 	if ((lease->new_state ==
8519 	     (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8520 	    !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8521 		lease->new_state = req_state;
8522 		return 0;
8523 	}
8524 
8525 	if (lease->new_state == req_state)
8526 		return 0;
8527 
8528 	return 1;
8529 }
8530 
8531 /**
8532  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8533  * @work:	smb work containing lease break command buffer
8534  *
8535  * Return:	0
8536  */
smb21_lease_break_ack(struct ksmbd_work * work)8537 static void smb21_lease_break_ack(struct ksmbd_work *work)
8538 {
8539 	struct ksmbd_conn *conn = work->conn;
8540 	struct smb2_lease_ack *req;
8541 	struct smb2_lease_ack *rsp;
8542 	struct oplock_info *opinfo;
8543 	__le32 err = 0;
8544 	int ret = 0;
8545 	unsigned int lease_change_type;
8546 	__le32 lease_state;
8547 	struct lease *lease;
8548 
8549 	WORK_BUFFERS(work, req, rsp);
8550 
8551 	ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8552 		    le32_to_cpu(req->LeaseState));
8553 	opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8554 	if (!opinfo) {
8555 		ksmbd_debug(OPLOCK, "file not opened\n");
8556 		smb2_set_err_rsp(work);
8557 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8558 		return;
8559 	}
8560 	lease = opinfo->o_lease;
8561 
8562 	if (opinfo->op_state == OPLOCK_STATE_NONE) {
8563 		pr_err("unexpected lease break state 0x%x\n",
8564 		       opinfo->op_state);
8565 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8566 		goto err_out;
8567 	}
8568 
8569 	if (check_lease_state(lease, req->LeaseState)) {
8570 		rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8571 		ksmbd_debug(OPLOCK,
8572 			    "req lease state: 0x%x, expected state: 0x%x\n",
8573 			    req->LeaseState, lease->new_state);
8574 		goto err_out;
8575 	}
8576 
8577 	if (!atomic_read(&opinfo->breaking_cnt)) {
8578 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8579 		goto err_out;
8580 	}
8581 
8582 	/* check for bad lease state */
8583 	if (req->LeaseState &
8584 	    (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8585 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8586 		if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8587 			lease_change_type = OPLOCK_WRITE_TO_NONE;
8588 		else
8589 			lease_change_type = OPLOCK_READ_TO_NONE;
8590 		ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8591 			    le32_to_cpu(lease->state),
8592 			    le32_to_cpu(req->LeaseState));
8593 	} else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8594 		   req->LeaseState != SMB2_LEASE_NONE_LE) {
8595 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8596 		lease_change_type = OPLOCK_READ_TO_NONE;
8597 		ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8598 			    le32_to_cpu(lease->state),
8599 			    le32_to_cpu(req->LeaseState));
8600 	} else {
8601 		/* valid lease state changes */
8602 		err = STATUS_INVALID_DEVICE_STATE;
8603 		if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8604 			if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8605 				lease_change_type = OPLOCK_WRITE_TO_NONE;
8606 			else
8607 				lease_change_type = OPLOCK_READ_TO_NONE;
8608 		} else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8609 			if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8610 				lease_change_type = OPLOCK_WRITE_TO_READ;
8611 			else
8612 				lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8613 		} else {
8614 			lease_change_type = 0;
8615 		}
8616 	}
8617 
8618 	switch (lease_change_type) {
8619 	case OPLOCK_WRITE_TO_READ:
8620 		ret = opinfo_write_to_read(opinfo);
8621 		break;
8622 	case OPLOCK_READ_HANDLE_TO_READ:
8623 		ret = opinfo_read_handle_to_read(opinfo);
8624 		break;
8625 	case OPLOCK_WRITE_TO_NONE:
8626 		ret = opinfo_write_to_none(opinfo);
8627 		break;
8628 	case OPLOCK_READ_TO_NONE:
8629 		ret = opinfo_read_to_none(opinfo);
8630 		break;
8631 	default:
8632 		ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8633 			    le32_to_cpu(lease->state),
8634 			    le32_to_cpu(req->LeaseState));
8635 	}
8636 
8637 	if (ret < 0) {
8638 		rsp->hdr.Status = err;
8639 		goto err_out;
8640 	}
8641 
8642 	lease_state = lease->state;
8643 	opinfo->op_state = OPLOCK_STATE_NONE;
8644 	wake_up_interruptible_all(&opinfo->oplock_q);
8645 	atomic_dec(&opinfo->breaking_cnt);
8646 	wake_up_interruptible_all(&opinfo->oplock_brk);
8647 	opinfo_put(opinfo);
8648 
8649 	rsp->StructureSize = cpu_to_le16(36);
8650 	rsp->Reserved = 0;
8651 	rsp->Flags = 0;
8652 	memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8653 	rsp->LeaseState = lease_state;
8654 	rsp->LeaseDuration = 0;
8655 	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8656 	if (!ret)
8657 		return;
8658 
8659 err_out:
8660 	wake_up_interruptible_all(&opinfo->oplock_q);
8661 	atomic_dec(&opinfo->breaking_cnt);
8662 	wake_up_interruptible_all(&opinfo->oplock_brk);
8663 
8664 	opinfo_put(opinfo);
8665 	smb2_set_err_rsp(work);
8666 }
8667 
8668 /**
8669  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8670  * @work:	smb work containing oplock/lease break command buffer
8671  *
8672  * Return:	0
8673  */
smb2_oplock_break(struct ksmbd_work * work)8674 int smb2_oplock_break(struct ksmbd_work *work)
8675 {
8676 	struct smb2_oplock_break *req;
8677 	struct smb2_oplock_break *rsp;
8678 
8679 	ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n");
8680 
8681 	WORK_BUFFERS(work, req, rsp);
8682 
8683 	switch (le16_to_cpu(req->StructureSize)) {
8684 	case OP_BREAK_STRUCT_SIZE_20:
8685 		smb20_oplock_break_ack(work);
8686 		break;
8687 	case OP_BREAK_STRUCT_SIZE_21:
8688 		smb21_lease_break_ack(work);
8689 		break;
8690 	default:
8691 		ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8692 			    le16_to_cpu(req->StructureSize));
8693 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8694 		smb2_set_err_rsp(work);
8695 	}
8696 
8697 	return 0;
8698 }
8699 
8700 /**
8701  * smb2_notify() - handler for smb2 notify request
8702  * @work:   smb work containing notify command buffer
8703  *
8704  * Return:      0
8705  */
smb2_notify(struct ksmbd_work * work)8706 int smb2_notify(struct ksmbd_work *work)
8707 {
8708 	struct smb2_change_notify_req *req;
8709 	struct smb2_change_notify_rsp *rsp;
8710 
8711 	ksmbd_debug(SMB, "Received smb2 notify\n");
8712 
8713 	WORK_BUFFERS(work, req, rsp);
8714 
8715 	if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8716 		rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8717 		smb2_set_err_rsp(work);
8718 		return 0;
8719 	}
8720 
8721 	smb2_set_err_rsp(work);
8722 	rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8723 	return 0;
8724 }
8725 
8726 /**
8727  * smb2_is_sign_req() - handler for checking packet signing status
8728  * @work:	smb work containing notify command buffer
8729  * @command:	SMB2 command id
8730  *
8731  * Return:	true if packed is signed, false otherwise
8732  */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8733 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8734 {
8735 	struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8736 
8737 	if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8738 	    command != SMB2_NEGOTIATE_HE &&
8739 	    command != SMB2_SESSION_SETUP_HE &&
8740 	    command != SMB2_OPLOCK_BREAK_HE)
8741 		return true;
8742 
8743 	return false;
8744 }
8745 
8746 /**
8747  * smb2_check_sign_req() - handler for req packet sign processing
8748  * @work:   smb work containing notify command buffer
8749  *
8750  * Return:	1 on success, 0 otherwise
8751  */
smb2_check_sign_req(struct ksmbd_work * work)8752 int smb2_check_sign_req(struct ksmbd_work *work)
8753 {
8754 	struct smb2_hdr *hdr;
8755 	char signature_req[SMB2_SIGNATURE_SIZE];
8756 	char signature[SMB2_HMACSHA256_SIZE];
8757 	struct kvec iov[1];
8758 	size_t len;
8759 
8760 	hdr = smb2_get_msg(work->request_buf);
8761 	if (work->next_smb2_rcv_hdr_off)
8762 		hdr = ksmbd_req_buf_next(work);
8763 
8764 	if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8765 		len = get_rfc1002_len(work->request_buf);
8766 	else if (hdr->NextCommand)
8767 		len = le32_to_cpu(hdr->NextCommand);
8768 	else
8769 		len = get_rfc1002_len(work->request_buf) -
8770 			work->next_smb2_rcv_hdr_off;
8771 
8772 	memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8773 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8774 
8775 	iov[0].iov_base = (char *)&hdr->ProtocolId;
8776 	iov[0].iov_len = len;
8777 
8778 	if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8779 				signature))
8780 		return 0;
8781 
8782 	if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8783 		pr_err("bad smb2 signature\n");
8784 		return 0;
8785 	}
8786 
8787 	return 1;
8788 }
8789 
8790 /**
8791  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8792  * @work:   smb work containing notify command buffer
8793  *
8794  */
smb2_set_sign_rsp(struct ksmbd_work * work)8795 void smb2_set_sign_rsp(struct ksmbd_work *work)
8796 {
8797 	struct smb2_hdr *hdr;
8798 	char signature[SMB2_HMACSHA256_SIZE];
8799 	struct kvec *iov;
8800 	int n_vec = 1;
8801 
8802 	hdr = ksmbd_resp_buf_curr(work);
8803 	hdr->Flags |= SMB2_FLAGS_SIGNED;
8804 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8805 
8806 	if (hdr->Command == SMB2_READ) {
8807 		iov = &work->iov[work->iov_idx - 1];
8808 		n_vec++;
8809 	} else {
8810 		iov = &work->iov[work->iov_idx];
8811 	}
8812 
8813 	if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8814 				 signature))
8815 		memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8816 }
8817 
8818 /**
8819  * smb3_check_sign_req() - handler for req packet sign processing
8820  * @work:   smb work containing notify command buffer
8821  *
8822  * Return:	1 on success, 0 otherwise
8823  */
smb3_check_sign_req(struct ksmbd_work * work)8824 int smb3_check_sign_req(struct ksmbd_work *work)
8825 {
8826 	struct ksmbd_conn *conn = work->conn;
8827 	char *signing_key;
8828 	struct smb2_hdr *hdr;
8829 	struct channel *chann;
8830 	char signature_req[SMB2_SIGNATURE_SIZE];
8831 	char signature[SMB2_CMACAES_SIZE];
8832 	struct kvec iov[1];
8833 	size_t len;
8834 
8835 	hdr = smb2_get_msg(work->request_buf);
8836 	if (work->next_smb2_rcv_hdr_off)
8837 		hdr = ksmbd_req_buf_next(work);
8838 
8839 	if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8840 		len = get_rfc1002_len(work->request_buf);
8841 	else if (hdr->NextCommand)
8842 		len = le32_to_cpu(hdr->NextCommand);
8843 	else
8844 		len = get_rfc1002_len(work->request_buf) -
8845 			work->next_smb2_rcv_hdr_off;
8846 
8847 	if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8848 		signing_key = work->sess->smb3signingkey;
8849 	} else {
8850 		chann = lookup_chann_list(work->sess, conn);
8851 		if (!chann) {
8852 			return 0;
8853 		}
8854 		signing_key = chann->smb3signingkey;
8855 	}
8856 
8857 	if (!signing_key) {
8858 		pr_err("SMB3 signing key is not generated\n");
8859 		return 0;
8860 	}
8861 
8862 	memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8863 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8864 	iov[0].iov_base = (char *)&hdr->ProtocolId;
8865 	iov[0].iov_len = len;
8866 
8867 	if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8868 		return 0;
8869 
8870 	if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8871 		pr_err("bad smb2 signature\n");
8872 		return 0;
8873 	}
8874 
8875 	return 1;
8876 }
8877 
8878 /**
8879  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8880  * @work:   smb work containing notify command buffer
8881  *
8882  */
smb3_set_sign_rsp(struct ksmbd_work * work)8883 void smb3_set_sign_rsp(struct ksmbd_work *work)
8884 {
8885 	struct ksmbd_conn *conn = work->conn;
8886 	struct smb2_hdr *hdr;
8887 	struct channel *chann;
8888 	char signature[SMB2_CMACAES_SIZE];
8889 	struct kvec *iov;
8890 	int n_vec = 1;
8891 	char *signing_key;
8892 
8893 	hdr = ksmbd_resp_buf_curr(work);
8894 
8895 	if (conn->binding == false &&
8896 	    le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8897 		signing_key = work->sess->smb3signingkey;
8898 	} else {
8899 		chann = lookup_chann_list(work->sess, work->conn);
8900 		if (!chann) {
8901 			return;
8902 		}
8903 		signing_key = chann->smb3signingkey;
8904 	}
8905 
8906 	if (!signing_key)
8907 		return;
8908 
8909 	hdr->Flags |= SMB2_FLAGS_SIGNED;
8910 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8911 
8912 	if (hdr->Command == SMB2_READ) {
8913 		iov = &work->iov[work->iov_idx - 1];
8914 		n_vec++;
8915 	} else {
8916 		iov = &work->iov[work->iov_idx];
8917 	}
8918 
8919 	if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8920 				 signature))
8921 		memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8922 }
8923 
8924 /**
8925  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8926  * @work:   smb work containing response buffer
8927  *
8928  */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8929 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8930 {
8931 	struct ksmbd_conn *conn = work->conn;
8932 	struct ksmbd_session *sess = work->sess;
8933 	struct smb2_hdr *req, *rsp;
8934 
8935 	if (conn->dialect != SMB311_PROT_ID)
8936 		return;
8937 
8938 	WORK_BUFFERS(work, req, rsp);
8939 
8940 	if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8941 	    conn->preauth_info)
8942 		ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8943 						 conn->preauth_info->Preauth_HashValue);
8944 
8945 	if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8946 		__u8 *hash_value;
8947 
8948 		if (conn->binding) {
8949 			struct preauth_session *preauth_sess;
8950 
8951 			preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8952 			if (!preauth_sess)
8953 				return;
8954 			hash_value = preauth_sess->Preauth_HashValue;
8955 		} else {
8956 			hash_value = sess->Preauth_HashValue;
8957 			if (!hash_value)
8958 				return;
8959 		}
8960 		ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8961 						 hash_value);
8962 	}
8963 }
8964 
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8965 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8966 {
8967 	struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8968 	struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8969 	unsigned int orig_len = get_rfc1002_len(old_buf);
8970 
8971 	/* tr_buf must be cleared by the caller */
8972 	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8973 	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8974 	tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8975 	if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8976 	    cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8977 		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8978 	else
8979 		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8980 	memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8981 	inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8982 	inc_rfc1001_len(tr_buf, orig_len);
8983 }
8984 
smb3_encrypt_resp(struct ksmbd_work * work)8985 int smb3_encrypt_resp(struct ksmbd_work *work)
8986 {
8987 	struct kvec *iov = work->iov;
8988 	int rc = -ENOMEM;
8989 	void *tr_buf;
8990 
8991 	tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP);
8992 	if (!tr_buf)
8993 		return rc;
8994 
8995 	/* fill transform header */
8996 	fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8997 
8998 	iov[0].iov_base = tr_buf;
8999 	iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
9000 	work->tr_buf = tr_buf;
9001 
9002 	return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
9003 }
9004 
smb3_is_transform_hdr(void * buf)9005 bool smb3_is_transform_hdr(void *buf)
9006 {
9007 	struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
9008 
9009 	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
9010 }
9011 
smb3_decrypt_req(struct ksmbd_work * work)9012 int smb3_decrypt_req(struct ksmbd_work *work)
9013 {
9014 	struct ksmbd_session *sess;
9015 	char *buf = work->request_buf;
9016 	unsigned int pdu_length = get_rfc1002_len(buf);
9017 	struct kvec iov[2];
9018 	int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
9019 	struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
9020 	int rc = 0;
9021 
9022 	if (pdu_length < sizeof(struct smb2_transform_hdr) ||
9023 	    buf_data_size < sizeof(struct smb2_hdr)) {
9024 		pr_err("Transform message is too small (%u)\n",
9025 		       pdu_length);
9026 		return -ECONNABORTED;
9027 	}
9028 
9029 	if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
9030 		pr_err("Transform message is broken\n");
9031 		return -ECONNABORTED;
9032 	}
9033 
9034 	sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
9035 	if (!sess) {
9036 		pr_err("invalid session id(%llx) in transform header\n",
9037 		       le64_to_cpu(tr_hdr->SessionId));
9038 		return -ECONNABORTED;
9039 	}
9040 	ksmbd_user_session_put(sess);
9041 
9042 	iov[0].iov_base = buf;
9043 	iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
9044 	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
9045 	iov[1].iov_len = buf_data_size;
9046 	rc = ksmbd_crypt_message(work, iov, 2, 0);
9047 	if (rc)
9048 		return rc;
9049 
9050 	memmove(buf + 4, iov[1].iov_base, buf_data_size);
9051 	*(__be32 *)buf = cpu_to_be32(buf_data_size);
9052 
9053 	return rc;
9054 }
9055 
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)9056 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
9057 {
9058 	struct ksmbd_conn *conn = work->conn;
9059 	struct ksmbd_session *sess = work->sess;
9060 	struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
9061 
9062 	if (conn->dialect < SMB30_PROT_ID)
9063 		return false;
9064 
9065 	if (work->next_smb2_rcv_hdr_off)
9066 		rsp = ksmbd_resp_buf_next(work);
9067 
9068 	if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
9069 	    sess->user && !user_guest(sess->user) &&
9070 	    rsp->Status == STATUS_SUCCESS)
9071 		return true;
9072 	return false;
9073 }
9074