1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> 4 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 5 */ 6 7 #include <linux/inetdevice.h> 8 #include <net/addrconf.h> 9 #include <linux/syscalls.h> 10 #include <linux/namei.h> 11 #include <linux/statfs.h> 12 #include <linux/ethtool.h> 13 #include <linux/falloc.h> 14 #include <linux/mount.h> 15 #include <linux/filelock.h> 16 17 #include "glob.h" 18 #include "smbfsctl.h" 19 #include "oplock.h" 20 #include "smbacl.h" 21 22 #include "auth.h" 23 #include "asn1.h" 24 #include "connection.h" 25 #include "transport_ipc.h" 26 #include "transport_rdma.h" 27 #include "vfs.h" 28 #include "vfs_cache.h" 29 #include "misc.h" 30 31 #include "server.h" 32 #include "smb_common.h" 33 #include "smbstatus.h" 34 #include "ksmbd_work.h" 35 #include "mgmt/user_config.h" 36 #include "mgmt/share_config.h" 37 #include "mgmt/tree_connect.h" 38 #include "mgmt/user_session.h" 39 #include "mgmt/ksmbd_ida.h" 40 #include "ndr.h" 41 42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) 43 { 44 if (work->next_smb2_rcv_hdr_off) { 45 *req = ksmbd_req_buf_next(work); 46 *rsp = ksmbd_resp_buf_next(work); 47 } else { 48 *req = smb2_get_msg(work->request_buf); 49 *rsp = smb2_get_msg(work->response_buf); 50 } 51 } 52 53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) 54 55 /** 56 * check_session_id() - check for valid session id in smb header 57 * @conn: connection instance 58 * @id: session id from smb header 59 * 60 * Return: 1 if valid session id, otherwise 0 61 */ 62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) 63 { 64 struct ksmbd_session *sess; 65 66 if (id == 0 || id == -1) 67 return false; 68 69 sess = ksmbd_session_lookup_all(conn, id); 70 if (sess) 71 return true; 72 pr_err("Invalid user session id: %llu\n", id); 73 return false; 74 } 75 76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) 77 { 78 return xa_load(&sess->ksmbd_chann_list, (long)conn); 79 } 80 81 /** 82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. 83 * @work: smb work 84 * 85 * Return: 0 if there is a tree connection matched or these are 86 * skipable commands, otherwise error 87 */ 88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work) 89 { 90 struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf); 91 unsigned int cmd = le16_to_cpu(req_hdr->Command); 92 int tree_id; 93 94 work->tcon = NULL; 95 if (cmd == SMB2_TREE_CONNECT_HE || 96 cmd == SMB2_CANCEL_HE || 97 cmd == SMB2_LOGOFF_HE) { 98 ksmbd_debug(SMB, "skip to check tree connect request\n"); 99 return 0; 100 } 101 102 if (xa_empty(&work->sess->tree_conns)) { 103 ksmbd_debug(SMB, "NO tree connected\n"); 104 return -ENOENT; 105 } 106 107 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 108 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 109 if (!work->tcon) { 110 pr_err("Invalid tid %d\n", tree_id); 111 return -EINVAL; 112 } 113 114 return 1; 115 } 116 117 /** 118 * smb2_set_err_rsp() - set error response code on smb response 119 * @work: smb work containing response buffer 120 */ 121 void smb2_set_err_rsp(struct ksmbd_work *work) 122 { 123 struct smb2_err_rsp *err_rsp; 124 125 if (work->next_smb2_rcv_hdr_off) 126 err_rsp = ksmbd_resp_buf_next(work); 127 else 128 err_rsp = smb2_get_msg(work->response_buf); 129 130 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 131 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 132 err_rsp->ErrorContextCount = 0; 133 err_rsp->Reserved = 0; 134 err_rsp->ByteCount = 0; 135 err_rsp->ErrorData[0] = 0; 136 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2); 137 } 138 } 139 140 /** 141 * is_smb2_neg_cmd() - is it smb2 negotiation command 142 * @work: smb work containing smb header 143 * 144 * Return: true if smb2 negotiation command, otherwise false 145 */ 146 bool is_smb2_neg_cmd(struct ksmbd_work *work) 147 { 148 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 149 150 /* is it SMB2 header ? */ 151 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 152 return false; 153 154 /* make sure it is request not response message */ 155 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 156 return false; 157 158 if (hdr->Command != SMB2_NEGOTIATE) 159 return false; 160 161 return true; 162 } 163 164 /** 165 * is_smb2_rsp() - is it smb2 response 166 * @work: smb work containing smb response buffer 167 * 168 * Return: true if smb2 response, otherwise false 169 */ 170 bool is_smb2_rsp(struct ksmbd_work *work) 171 { 172 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); 173 174 /* is it SMB2 header ? */ 175 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 176 return false; 177 178 /* make sure it is response not request message */ 179 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 180 return false; 181 182 return true; 183 } 184 185 /** 186 * get_smb2_cmd_val() - get smb command code from smb header 187 * @work: smb work containing smb request buffer 188 * 189 * Return: smb2 request command value 190 */ 191 u16 get_smb2_cmd_val(struct ksmbd_work *work) 192 { 193 struct smb2_hdr *rcv_hdr; 194 195 if (work->next_smb2_rcv_hdr_off) 196 rcv_hdr = ksmbd_req_buf_next(work); 197 else 198 rcv_hdr = smb2_get_msg(work->request_buf); 199 return le16_to_cpu(rcv_hdr->Command); 200 } 201 202 /** 203 * set_smb2_rsp_status() - set error response code on smb2 header 204 * @work: smb work containing response buffer 205 * @err: error response code 206 */ 207 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 208 { 209 struct smb2_hdr *rsp_hdr; 210 211 if (work->next_smb2_rcv_hdr_off) 212 rsp_hdr = ksmbd_resp_buf_next(work); 213 else 214 rsp_hdr = smb2_get_msg(work->response_buf); 215 rsp_hdr->Status = err; 216 smb2_set_err_rsp(work); 217 } 218 219 /** 220 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 221 * @work: smb work containing smb request buffer 222 * 223 * smb2 negotiate response is sent in reply of smb1 negotiate command for 224 * dialect auto-negotiation. 225 */ 226 int init_smb2_neg_rsp(struct ksmbd_work *work) 227 { 228 struct smb2_hdr *rsp_hdr; 229 struct smb2_negotiate_rsp *rsp; 230 struct ksmbd_conn *conn = work->conn; 231 232 *(__be32 *)work->response_buf = 233 cpu_to_be32(conn->vals->header_size); 234 235 rsp_hdr = smb2_get_msg(work->response_buf); 236 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 237 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 238 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 239 rsp_hdr->CreditRequest = cpu_to_le16(2); 240 rsp_hdr->Command = SMB2_NEGOTIATE; 241 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 242 rsp_hdr->NextCommand = 0; 243 rsp_hdr->MessageId = 0; 244 rsp_hdr->Id.SyncId.ProcessId = 0; 245 rsp_hdr->Id.SyncId.TreeId = 0; 246 rsp_hdr->SessionId = 0; 247 memset(rsp_hdr->Signature, 0, 16); 248 249 rsp = smb2_get_msg(work->response_buf); 250 251 WARN_ON(ksmbd_conn_good(conn)); 252 253 rsp->StructureSize = cpu_to_le16(65); 254 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 255 rsp->DialectRevision = cpu_to_le16(conn->dialect); 256 /* Not setting conn guid rsp->ServerGUID, as it 257 * not used by client for identifying connection 258 */ 259 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 260 /* Default Max Message Size till SMB2.0, 64K*/ 261 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 262 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 263 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 264 265 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 266 rsp->ServerStartTime = 0; 267 268 rsp->SecurityBufferOffset = cpu_to_le16(128); 269 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 270 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 271 le16_to_cpu(rsp->SecurityBufferOffset)); 272 inc_rfc1001_len(work->response_buf, 273 sizeof(struct smb2_negotiate_rsp) - 274 sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH); 275 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 276 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 277 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 278 conn->use_spnego = true; 279 280 ksmbd_conn_set_need_negotiate(conn); 281 return 0; 282 } 283 284 /** 285 * smb2_set_rsp_credits() - set number of credits in response buffer 286 * @work: smb work containing smb response buffer 287 */ 288 int smb2_set_rsp_credits(struct ksmbd_work *work) 289 { 290 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 291 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 292 struct ksmbd_conn *conn = work->conn; 293 unsigned short credits_requested, aux_max; 294 unsigned short credit_charge, credits_granted = 0; 295 296 if (work->send_no_response) 297 return 0; 298 299 hdr->CreditCharge = req_hdr->CreditCharge; 300 301 if (conn->total_credits > conn->vals->max_credits) { 302 hdr->CreditRequest = 0; 303 pr_err("Total credits overflow: %d\n", conn->total_credits); 304 return -EINVAL; 305 } 306 307 credit_charge = max_t(unsigned short, 308 le16_to_cpu(req_hdr->CreditCharge), 1); 309 if (credit_charge > conn->total_credits) { 310 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 311 credit_charge, conn->total_credits); 312 return -EINVAL; 313 } 314 315 conn->total_credits -= credit_charge; 316 conn->outstanding_credits -= credit_charge; 317 credits_requested = max_t(unsigned short, 318 le16_to_cpu(req_hdr->CreditRequest), 1); 319 320 /* according to smb2.credits smbtorture, Windows server 321 * 2016 or later grant up to 8192 credits at once. 322 * 323 * TODO: Need to adjuct CreditRequest value according to 324 * current cpu load 325 */ 326 if (hdr->Command == SMB2_NEGOTIATE) 327 aux_max = 1; 328 else 329 aux_max = conn->vals->max_credits - credit_charge; 330 credits_granted = min_t(unsigned short, credits_requested, aux_max); 331 332 if (conn->vals->max_credits - conn->total_credits < credits_granted) 333 credits_granted = conn->vals->max_credits - 334 conn->total_credits; 335 336 conn->total_credits += credits_granted; 337 work->credits_granted += credits_granted; 338 339 if (!req_hdr->NextCommand) { 340 /* Update CreditRequest in last request */ 341 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 342 } 343 ksmbd_debug(SMB, 344 "credits: requested[%d] granted[%d] total_granted[%d]\n", 345 credits_requested, credits_granted, 346 conn->total_credits); 347 return 0; 348 } 349 350 /** 351 * init_chained_smb2_rsp() - initialize smb2 chained response 352 * @work: smb work containing smb response buffer 353 */ 354 static void init_chained_smb2_rsp(struct ksmbd_work *work) 355 { 356 struct smb2_hdr *req = ksmbd_req_buf_next(work); 357 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 358 struct smb2_hdr *rsp_hdr; 359 struct smb2_hdr *rcv_hdr; 360 int next_hdr_offset = 0; 361 int len, new_len; 362 363 /* Len of this response = updated RFC len - offset of previous cmd 364 * in the compound rsp 365 */ 366 367 /* Storing the current local FID which may be needed by subsequent 368 * command in the compound request 369 */ 370 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 371 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 372 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 373 work->compound_sid = le64_to_cpu(rsp->SessionId); 374 } 375 376 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 377 next_hdr_offset = le32_to_cpu(req->NextCommand); 378 379 new_len = ALIGN(len, 8); 380 inc_rfc1001_len(work->response_buf, 381 sizeof(struct smb2_hdr) + new_len - len); 382 rsp->NextCommand = cpu_to_le32(new_len); 383 384 work->next_smb2_rcv_hdr_off += next_hdr_offset; 385 work->next_smb2_rsp_hdr_off += new_len; 386 ksmbd_debug(SMB, 387 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 388 new_len, work->next_smb2_rcv_hdr_off, 389 work->next_smb2_rsp_hdr_off); 390 391 rsp_hdr = ksmbd_resp_buf_next(work); 392 rcv_hdr = ksmbd_req_buf_next(work); 393 394 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 395 ksmbd_debug(SMB, "related flag should be set\n"); 396 work->compound_fid = KSMBD_NO_FID; 397 work->compound_pfid = KSMBD_NO_FID; 398 } 399 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 400 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 401 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 402 rsp_hdr->Command = rcv_hdr->Command; 403 404 /* 405 * Message is response. We don't grant oplock yet. 406 */ 407 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 408 SMB2_FLAGS_RELATED_OPERATIONS); 409 rsp_hdr->NextCommand = 0; 410 rsp_hdr->MessageId = rcv_hdr->MessageId; 411 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 412 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 413 rsp_hdr->SessionId = rcv_hdr->SessionId; 414 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 415 } 416 417 /** 418 * is_chained_smb2_message() - check for chained command 419 * @work: smb work containing smb request buffer 420 * 421 * Return: true if chained request, otherwise false 422 */ 423 bool is_chained_smb2_message(struct ksmbd_work *work) 424 { 425 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 426 unsigned int len, next_cmd; 427 428 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 429 return false; 430 431 hdr = ksmbd_req_buf_next(work); 432 next_cmd = le32_to_cpu(hdr->NextCommand); 433 if (next_cmd > 0) { 434 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 435 __SMB2_HEADER_STRUCTURE_SIZE > 436 get_rfc1002_len(work->request_buf)) { 437 pr_err("next command(%u) offset exceeds smb msg size\n", 438 next_cmd); 439 return false; 440 } 441 442 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 443 work->response_sz) { 444 pr_err("next response offset exceeds response buffer size\n"); 445 return false; 446 } 447 448 ksmbd_debug(SMB, "got SMB2 chained command\n"); 449 init_chained_smb2_rsp(work); 450 return true; 451 } else if (work->next_smb2_rcv_hdr_off) { 452 /* 453 * This is last request in chained command, 454 * align response to 8 byte 455 */ 456 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 457 len = len - get_rfc1002_len(work->response_buf); 458 if (len) { 459 ksmbd_debug(SMB, "padding len %u\n", len); 460 inc_rfc1001_len(work->response_buf, len); 461 if (work->aux_payload_sz) 462 work->aux_payload_sz += len; 463 } 464 } 465 return false; 466 } 467 468 /** 469 * init_smb2_rsp_hdr() - initialize smb2 response 470 * @work: smb work containing smb request buffer 471 * 472 * Return: 0 473 */ 474 int init_smb2_rsp_hdr(struct ksmbd_work *work) 475 { 476 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); 477 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); 478 struct ksmbd_conn *conn = work->conn; 479 480 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 481 *(__be32 *)work->response_buf = 482 cpu_to_be32(conn->vals->header_size); 483 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 484 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 485 rsp_hdr->Command = rcv_hdr->Command; 486 487 /* 488 * Message is response. We don't grant oplock yet. 489 */ 490 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 491 rsp_hdr->NextCommand = 0; 492 rsp_hdr->MessageId = rcv_hdr->MessageId; 493 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 494 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 495 rsp_hdr->SessionId = rcv_hdr->SessionId; 496 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 497 498 return 0; 499 } 500 501 /** 502 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 503 * @work: smb work containing smb request buffer 504 * 505 * Return: 0 on success, otherwise -ENOMEM 506 */ 507 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 508 { 509 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 510 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 511 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 512 size_t sz = small_sz; 513 int cmd = le16_to_cpu(hdr->Command); 514 515 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 516 sz = large_sz; 517 518 if (cmd == SMB2_QUERY_INFO_HE) { 519 struct smb2_query_info_req *req; 520 521 req = smb2_get_msg(work->request_buf); 522 if ((req->InfoType == SMB2_O_INFO_FILE && 523 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 524 req->FileInfoClass == FILE_ALL_INFORMATION)) || 525 req->InfoType == SMB2_O_INFO_SECURITY) 526 sz = large_sz; 527 } 528 529 /* allocate large response buf for chained commands */ 530 if (le32_to_cpu(hdr->NextCommand) > 0) 531 sz = large_sz; 532 533 work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO); 534 if (!work->response_buf) 535 return -ENOMEM; 536 537 work->response_sz = sz; 538 return 0; 539 } 540 541 /** 542 * smb2_check_user_session() - check for valid session for a user 543 * @work: smb work containing smb request buffer 544 * 545 * Return: 0 on success, otherwise error 546 */ 547 int smb2_check_user_session(struct ksmbd_work *work) 548 { 549 struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf); 550 struct ksmbd_conn *conn = work->conn; 551 unsigned int cmd = conn->ops->get_cmd_val(work); 552 unsigned long long sess_id; 553 554 work->sess = NULL; 555 /* 556 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 557 * require a session id, so no need to validate user session's for 558 * these commands. 559 */ 560 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 561 cmd == SMB2_SESSION_SETUP_HE) 562 return 0; 563 564 if (!ksmbd_conn_good(conn)) 565 return -EINVAL; 566 567 sess_id = le64_to_cpu(req_hdr->SessionId); 568 /* Check for validity of user session */ 569 work->sess = ksmbd_session_lookup_all(conn, sess_id); 570 if (work->sess) 571 return 1; 572 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 573 return -EINVAL; 574 } 575 576 static void destroy_previous_session(struct ksmbd_conn *conn, 577 struct ksmbd_user *user, u64 id) 578 { 579 struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id); 580 struct ksmbd_user *prev_user; 581 struct channel *chann; 582 long index; 583 584 if (!prev_sess) 585 return; 586 587 prev_user = prev_sess->user; 588 589 if (!prev_user || 590 strcmp(user->name, prev_user->name) || 591 user->passkey_sz != prev_user->passkey_sz || 592 memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) 593 return; 594 595 prev_sess->state = SMB2_SESSION_EXPIRED; 596 xa_for_each(&prev_sess->ksmbd_chann_list, index, chann) 597 ksmbd_conn_set_exiting(chann->conn); 598 } 599 600 /** 601 * smb2_get_name() - get filename string from on the wire smb format 602 * @src: source buffer 603 * @maxlen: maxlen of source string 604 * @local_nls: nls_table pointer 605 * 606 * Return: matching converted filename on success, otherwise error ptr 607 */ 608 static char * 609 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 610 { 611 char *name; 612 613 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 614 if (IS_ERR(name)) { 615 pr_err("failed to get name %ld\n", PTR_ERR(name)); 616 return name; 617 } 618 619 ksmbd_conv_path_to_unix(name); 620 ksmbd_strip_last_slash(name); 621 return name; 622 } 623 624 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 625 { 626 struct smb2_hdr *rsp_hdr; 627 struct ksmbd_conn *conn = work->conn; 628 int id; 629 630 rsp_hdr = smb2_get_msg(work->response_buf); 631 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 632 633 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 634 if (id < 0) { 635 pr_err("Failed to alloc async message id\n"); 636 return id; 637 } 638 work->asynchronous = true; 639 work->async_id = id; 640 rsp_hdr->Id.AsyncId = cpu_to_le64(id); 641 642 ksmbd_debug(SMB, 643 "Send interim Response to inform async request id : %d\n", 644 work->async_id); 645 646 work->cancel_fn = fn; 647 work->cancel_argv = arg; 648 649 if (list_empty(&work->async_request_entry)) { 650 spin_lock(&conn->request_lock); 651 list_add_tail(&work->async_request_entry, &conn->async_requests); 652 spin_unlock(&conn->request_lock); 653 } 654 655 return 0; 656 } 657 658 void release_async_work(struct ksmbd_work *work) 659 { 660 struct ksmbd_conn *conn = work->conn; 661 662 spin_lock(&conn->request_lock); 663 list_del_init(&work->async_request_entry); 664 spin_unlock(&conn->request_lock); 665 666 work->asynchronous = 0; 667 work->cancel_fn = NULL; 668 kfree(work->cancel_argv); 669 work->cancel_argv = NULL; 670 if (work->async_id) { 671 ksmbd_release_id(&conn->async_ida, work->async_id); 672 work->async_id = 0; 673 } 674 } 675 676 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 677 { 678 struct smb2_hdr *rsp_hdr; 679 680 rsp_hdr = smb2_get_msg(work->response_buf); 681 smb2_set_err_rsp(work); 682 rsp_hdr->Status = status; 683 684 work->multiRsp = 1; 685 ksmbd_conn_write(work); 686 rsp_hdr->Status = 0; 687 work->multiRsp = 0; 688 } 689 690 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 691 { 692 if (S_ISDIR(mode) || S_ISREG(mode)) 693 return 0; 694 695 if (S_ISLNK(mode)) 696 return IO_REPARSE_TAG_LX_SYMLINK_LE; 697 else if (S_ISFIFO(mode)) 698 return IO_REPARSE_TAG_LX_FIFO_LE; 699 else if (S_ISSOCK(mode)) 700 return IO_REPARSE_TAG_AF_UNIX_LE; 701 else if (S_ISCHR(mode)) 702 return IO_REPARSE_TAG_LX_CHR_LE; 703 else if (S_ISBLK(mode)) 704 return IO_REPARSE_TAG_LX_BLK_LE; 705 706 return 0; 707 } 708 709 /** 710 * smb2_get_dos_mode() - get file mode in dos format from unix mode 711 * @stat: kstat containing file mode 712 * @attribute: attribute flags 713 * 714 * Return: converted dos mode 715 */ 716 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 717 { 718 int attr = 0; 719 720 if (S_ISDIR(stat->mode)) { 721 attr = FILE_ATTRIBUTE_DIRECTORY | 722 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 723 } else { 724 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 725 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 726 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 727 FILE_SUPPORTS_SPARSE_FILES)) 728 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 729 730 if (smb2_get_reparse_tag_special_file(stat->mode)) 731 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 732 } 733 734 return attr; 735 } 736 737 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 738 __le16 hash_id) 739 { 740 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 741 pneg_ctxt->DataLength = cpu_to_le16(38); 742 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 743 pneg_ctxt->Reserved = cpu_to_le32(0); 744 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 745 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 746 pneg_ctxt->HashAlgorithms = hash_id; 747 } 748 749 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 750 __le16 cipher_type) 751 { 752 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 753 pneg_ctxt->DataLength = cpu_to_le16(4); 754 pneg_ctxt->Reserved = cpu_to_le32(0); 755 pneg_ctxt->CipherCount = cpu_to_le16(1); 756 pneg_ctxt->Ciphers[0] = cipher_type; 757 } 758 759 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 760 __le16 sign_algo) 761 { 762 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 763 pneg_ctxt->DataLength = 764 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 765 - sizeof(struct smb2_neg_context)); 766 pneg_ctxt->Reserved = cpu_to_le32(0); 767 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 768 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 769 } 770 771 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 772 { 773 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 774 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 775 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 776 pneg_ctxt->Name[0] = 0x93; 777 pneg_ctxt->Name[1] = 0xAD; 778 pneg_ctxt->Name[2] = 0x25; 779 pneg_ctxt->Name[3] = 0x50; 780 pneg_ctxt->Name[4] = 0x9C; 781 pneg_ctxt->Name[5] = 0xB4; 782 pneg_ctxt->Name[6] = 0x11; 783 pneg_ctxt->Name[7] = 0xE7; 784 pneg_ctxt->Name[8] = 0xB4; 785 pneg_ctxt->Name[9] = 0x23; 786 pneg_ctxt->Name[10] = 0x83; 787 pneg_ctxt->Name[11] = 0xDE; 788 pneg_ctxt->Name[12] = 0x96; 789 pneg_ctxt->Name[13] = 0x8B; 790 pneg_ctxt->Name[14] = 0xCD; 791 pneg_ctxt->Name[15] = 0x7C; 792 } 793 794 static void assemble_neg_contexts(struct ksmbd_conn *conn, 795 struct smb2_negotiate_rsp *rsp, 796 void *smb2_buf_len) 797 { 798 char * const pneg_ctxt = (char *)rsp + 799 le32_to_cpu(rsp->NegotiateContextOffset); 800 int neg_ctxt_cnt = 1; 801 int ctxt_size; 802 803 ksmbd_debug(SMB, 804 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 805 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 806 conn->preauth_info->Preauth_HashId); 807 inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING); 808 ctxt_size = sizeof(struct smb2_preauth_neg_context); 809 810 if (conn->cipher_type) { 811 /* Round to 8 byte boundary */ 812 ctxt_size = round_up(ctxt_size, 8); 813 ksmbd_debug(SMB, 814 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 815 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 816 (pneg_ctxt + ctxt_size), 817 conn->cipher_type); 818 neg_ctxt_cnt++; 819 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 820 } 821 822 /* compression context not yet supported */ 823 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 824 825 if (conn->posix_ext_supported) { 826 ctxt_size = round_up(ctxt_size, 8); 827 ksmbd_debug(SMB, 828 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 829 build_posix_ctxt((struct smb2_posix_neg_context *) 830 (pneg_ctxt + ctxt_size)); 831 neg_ctxt_cnt++; 832 ctxt_size += sizeof(struct smb2_posix_neg_context); 833 } 834 835 if (conn->signing_negotiated) { 836 ctxt_size = round_up(ctxt_size, 8); 837 ksmbd_debug(SMB, 838 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 839 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 840 (pneg_ctxt + ctxt_size), 841 conn->signing_algorithm); 842 neg_ctxt_cnt++; 843 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 844 } 845 846 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 847 inc_rfc1001_len(smb2_buf_len, ctxt_size); 848 } 849 850 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 851 struct smb2_preauth_neg_context *pneg_ctxt, 852 int len_of_ctxts) 853 { 854 /* 855 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 856 * which may not be present. Only check for used HashAlgorithms[1]. 857 */ 858 if (len_of_ctxts < MIN_PREAUTH_CTXT_DATA_LEN) 859 return STATUS_INVALID_PARAMETER; 860 861 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 862 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 863 864 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 865 return STATUS_SUCCESS; 866 } 867 868 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 869 struct smb2_encryption_neg_context *pneg_ctxt, 870 int len_of_ctxts) 871 { 872 int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 873 int i, cphs_size = cph_cnt * sizeof(__le16); 874 875 conn->cipher_type = 0; 876 877 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 878 len_of_ctxts) { 879 pr_err("Invalid cipher count(%d)\n", cph_cnt); 880 return; 881 } 882 883 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 884 return; 885 886 for (i = 0; i < cph_cnt; i++) { 887 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 888 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 889 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 890 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 891 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 892 pneg_ctxt->Ciphers[i]); 893 conn->cipher_type = pneg_ctxt->Ciphers[i]; 894 break; 895 } 896 } 897 } 898 899 /** 900 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 901 * @conn: smb connection 902 * 903 * Return: true if connection should be encrypted, else false 904 */ 905 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 906 { 907 if (!conn->ops->generate_encryptionkey) 908 return false; 909 910 /* 911 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 912 * SMB 3.1.1 uses the cipher_type field. 913 */ 914 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 915 conn->cipher_type; 916 } 917 918 static void decode_compress_ctxt(struct ksmbd_conn *conn, 919 struct smb2_compression_capabilities_context *pneg_ctxt) 920 { 921 conn->compress_algorithm = SMB3_COMPRESS_NONE; 922 } 923 924 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 925 struct smb2_signing_capabilities *pneg_ctxt, 926 int len_of_ctxts) 927 { 928 int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 929 int i, sign_alos_size = sign_algo_cnt * sizeof(__le16); 930 931 conn->signing_negotiated = false; 932 933 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 934 len_of_ctxts) { 935 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 936 return; 937 } 938 939 for (i = 0; i < sign_algo_cnt; i++) { 940 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 941 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 942 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 943 pneg_ctxt->SigningAlgorithms[i]); 944 conn->signing_negotiated = true; 945 conn->signing_algorithm = 946 pneg_ctxt->SigningAlgorithms[i]; 947 break; 948 } 949 } 950 } 951 952 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 953 struct smb2_negotiate_req *req, 954 int len_of_smb) 955 { 956 /* +4 is to account for the RFC1001 len field */ 957 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 958 int i = 0, len_of_ctxts; 959 int offset = le32_to_cpu(req->NegotiateContextOffset); 960 int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 961 __le32 status = STATUS_INVALID_PARAMETER; 962 963 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 964 if (len_of_smb <= offset) { 965 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 966 return status; 967 } 968 969 len_of_ctxts = len_of_smb - offset; 970 971 while (i++ < neg_ctxt_cnt) { 972 int clen; 973 974 /* check that offset is not beyond end of SMB */ 975 if (len_of_ctxts == 0) 976 break; 977 978 if (len_of_ctxts < sizeof(struct smb2_neg_context)) 979 break; 980 981 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 982 clen = le16_to_cpu(pctx->DataLength); 983 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts) 984 break; 985 986 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 987 ksmbd_debug(SMB, 988 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 989 if (conn->preauth_info->Preauth_HashId) 990 break; 991 992 status = decode_preauth_ctxt(conn, 993 (struct smb2_preauth_neg_context *)pctx, 994 len_of_ctxts); 995 if (status != STATUS_SUCCESS) 996 break; 997 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 998 ksmbd_debug(SMB, 999 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1000 if (conn->cipher_type) 1001 break; 1002 1003 decode_encrypt_ctxt(conn, 1004 (struct smb2_encryption_neg_context *)pctx, 1005 len_of_ctxts); 1006 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1007 ksmbd_debug(SMB, 1008 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1009 if (conn->compress_algorithm) 1010 break; 1011 1012 decode_compress_ctxt(conn, 1013 (struct smb2_compression_capabilities_context *)pctx); 1014 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1015 ksmbd_debug(SMB, 1016 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1017 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1018 ksmbd_debug(SMB, 1019 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1020 conn->posix_ext_supported = true; 1021 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1022 ksmbd_debug(SMB, 1023 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1024 decode_sign_cap_ctxt(conn, 1025 (struct smb2_signing_capabilities *)pctx, 1026 len_of_ctxts); 1027 } 1028 1029 /* offsets must be 8 byte aligned */ 1030 clen = (clen + 7) & ~0x7; 1031 offset = clen + sizeof(struct smb2_neg_context); 1032 len_of_ctxts -= clen + sizeof(struct smb2_neg_context); 1033 } 1034 return status; 1035 } 1036 1037 /** 1038 * smb2_handle_negotiate() - handler for smb2 negotiate command 1039 * @work: smb work containing smb request buffer 1040 * 1041 * Return: 0 1042 */ 1043 int smb2_handle_negotiate(struct ksmbd_work *work) 1044 { 1045 struct ksmbd_conn *conn = work->conn; 1046 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); 1047 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); 1048 int rc = 0; 1049 unsigned int smb2_buf_len, smb2_neg_size; 1050 __le32 status; 1051 1052 ksmbd_debug(SMB, "Received negotiate request\n"); 1053 conn->need_neg = false; 1054 if (ksmbd_conn_good(conn)) { 1055 pr_err("conn->tcp_status is already in CifsGood State\n"); 1056 work->send_no_response = 1; 1057 return rc; 1058 } 1059 1060 if (req->DialectCount == 0) { 1061 pr_err("malformed packet\n"); 1062 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1063 rc = -EINVAL; 1064 goto err_out; 1065 } 1066 1067 smb2_buf_len = get_rfc1002_len(work->request_buf); 1068 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1069 if (smb2_neg_size > smb2_buf_len) { 1070 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1071 rc = -EINVAL; 1072 goto err_out; 1073 } 1074 1075 if (conn->dialect == SMB311_PROT_ID) { 1076 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1077 1078 if (smb2_buf_len < nego_ctxt_off) { 1079 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1080 rc = -EINVAL; 1081 goto err_out; 1082 } 1083 1084 if (smb2_neg_size > nego_ctxt_off) { 1085 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1086 rc = -EINVAL; 1087 goto err_out; 1088 } 1089 1090 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1091 nego_ctxt_off) { 1092 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1093 rc = -EINVAL; 1094 goto err_out; 1095 } 1096 } else { 1097 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1098 smb2_buf_len) { 1099 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1100 rc = -EINVAL; 1101 goto err_out; 1102 } 1103 } 1104 1105 conn->cli_cap = le32_to_cpu(req->Capabilities); 1106 switch (conn->dialect) { 1107 case SMB311_PROT_ID: 1108 conn->preauth_info = 1109 kzalloc(sizeof(struct preauth_integrity_info), 1110 GFP_KERNEL); 1111 if (!conn->preauth_info) { 1112 rc = -ENOMEM; 1113 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1114 goto err_out; 1115 } 1116 1117 status = deassemble_neg_contexts(conn, req, 1118 get_rfc1002_len(work->request_buf)); 1119 if (status != STATUS_SUCCESS) { 1120 pr_err("deassemble_neg_contexts error(0x%x)\n", 1121 status); 1122 rsp->hdr.Status = status; 1123 rc = -EINVAL; 1124 kfree(conn->preauth_info); 1125 conn->preauth_info = NULL; 1126 goto err_out; 1127 } 1128 1129 rc = init_smb3_11_server(conn); 1130 if (rc < 0) { 1131 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1132 kfree(conn->preauth_info); 1133 conn->preauth_info = NULL; 1134 goto err_out; 1135 } 1136 1137 ksmbd_gen_preauth_integrity_hash(conn, 1138 work->request_buf, 1139 conn->preauth_info->Preauth_HashValue); 1140 rsp->NegotiateContextOffset = 1141 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1142 assemble_neg_contexts(conn, rsp, work->response_buf); 1143 break; 1144 case SMB302_PROT_ID: 1145 init_smb3_02_server(conn); 1146 break; 1147 case SMB30_PROT_ID: 1148 init_smb3_0_server(conn); 1149 break; 1150 case SMB21_PROT_ID: 1151 init_smb2_1_server(conn); 1152 break; 1153 case SMB2X_PROT_ID: 1154 case BAD_PROT_ID: 1155 default: 1156 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1157 conn->dialect); 1158 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1159 rc = -EINVAL; 1160 goto err_out; 1161 } 1162 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 1163 1164 /* For stats */ 1165 conn->connection_type = conn->dialect; 1166 1167 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1168 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1169 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1170 1171 memcpy(conn->ClientGUID, req->ClientGUID, 1172 SMB2_CLIENT_GUID_SIZE); 1173 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1174 1175 rsp->StructureSize = cpu_to_le16(65); 1176 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1177 /* Not setting conn guid rsp->ServerGUID, as it 1178 * not used by client for identifying server 1179 */ 1180 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1181 1182 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1183 rsp->ServerStartTime = 0; 1184 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1185 le32_to_cpu(rsp->NegotiateContextOffset), 1186 le16_to_cpu(rsp->NegotiateContextCount)); 1187 1188 rsp->SecurityBufferOffset = cpu_to_le16(128); 1189 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1190 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1191 le16_to_cpu(rsp->SecurityBufferOffset)); 1192 inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) - 1193 sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH); 1194 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1195 conn->use_spnego = true; 1196 1197 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1198 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1199 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1200 conn->sign = true; 1201 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1202 server_conf.enforced_signing = true; 1203 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1204 conn->sign = true; 1205 } 1206 1207 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1208 ksmbd_conn_set_need_negotiate(conn); 1209 1210 err_out: 1211 if (rc < 0) 1212 smb2_set_err_rsp(work); 1213 1214 return rc; 1215 } 1216 1217 static int alloc_preauth_hash(struct ksmbd_session *sess, 1218 struct ksmbd_conn *conn) 1219 { 1220 if (sess->Preauth_HashValue) 1221 return 0; 1222 1223 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1224 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); 1225 if (!sess->Preauth_HashValue) 1226 return -ENOMEM; 1227 1228 return 0; 1229 } 1230 1231 static int generate_preauth_hash(struct ksmbd_work *work) 1232 { 1233 struct ksmbd_conn *conn = work->conn; 1234 struct ksmbd_session *sess = work->sess; 1235 u8 *preauth_hash; 1236 1237 if (conn->dialect != SMB311_PROT_ID) 1238 return 0; 1239 1240 if (conn->binding) { 1241 struct preauth_session *preauth_sess; 1242 1243 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1244 if (!preauth_sess) { 1245 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1246 if (!preauth_sess) 1247 return -ENOMEM; 1248 } 1249 1250 preauth_hash = preauth_sess->Preauth_HashValue; 1251 } else { 1252 if (!sess->Preauth_HashValue) 1253 if (alloc_preauth_hash(sess, conn)) 1254 return -ENOMEM; 1255 preauth_hash = sess->Preauth_HashValue; 1256 } 1257 1258 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1259 return 0; 1260 } 1261 1262 static int decode_negotiation_token(struct ksmbd_conn *conn, 1263 struct negotiate_message *negblob, 1264 size_t sz) 1265 { 1266 if (!conn->use_spnego) 1267 return -EINVAL; 1268 1269 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1270 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1271 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1272 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1273 conn->use_spnego = false; 1274 } 1275 } 1276 return 0; 1277 } 1278 1279 static int ntlm_negotiate(struct ksmbd_work *work, 1280 struct negotiate_message *negblob, 1281 size_t negblob_len) 1282 { 1283 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); 1284 struct challenge_message *chgblob; 1285 unsigned char *spnego_blob = NULL; 1286 u16 spnego_blob_len; 1287 char *neg_blob; 1288 int sz, rc; 1289 1290 ksmbd_debug(SMB, "negotiate phase\n"); 1291 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1292 if (rc) 1293 return rc; 1294 1295 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1296 chgblob = 1297 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); 1298 memset(chgblob, 0, sizeof(struct challenge_message)); 1299 1300 if (!work->conn->use_spnego) { 1301 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1302 if (sz < 0) 1303 return -ENOMEM; 1304 1305 rsp->SecurityBufferLength = cpu_to_le16(sz); 1306 return 0; 1307 } 1308 1309 sz = sizeof(struct challenge_message); 1310 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1311 1312 neg_blob = kzalloc(sz, GFP_KERNEL); 1313 if (!neg_blob) 1314 return -ENOMEM; 1315 1316 chgblob = (struct challenge_message *)neg_blob; 1317 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1318 if (sz < 0) { 1319 rc = -ENOMEM; 1320 goto out; 1321 } 1322 1323 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1324 neg_blob, sz); 1325 if (rc) { 1326 rc = -ENOMEM; 1327 goto out; 1328 } 1329 1330 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1331 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1332 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1333 1334 out: 1335 kfree(spnego_blob); 1336 kfree(neg_blob); 1337 return rc; 1338 } 1339 1340 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1341 struct smb2_sess_setup_req *req) 1342 { 1343 int sz; 1344 1345 if (conn->use_spnego && conn->mechToken) 1346 return (struct authenticate_message *)conn->mechToken; 1347 1348 sz = le16_to_cpu(req->SecurityBufferOffset); 1349 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1350 + sz); 1351 } 1352 1353 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1354 struct smb2_sess_setup_req *req) 1355 { 1356 struct authenticate_message *authblob; 1357 struct ksmbd_user *user; 1358 char *name; 1359 unsigned int name_off, name_len, secbuf_len; 1360 1361 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1362 if (secbuf_len < sizeof(struct authenticate_message)) { 1363 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1364 return NULL; 1365 } 1366 authblob = user_authblob(conn, req); 1367 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1368 name_len = le16_to_cpu(authblob->UserName.Length); 1369 1370 if (secbuf_len < (u64)name_off + name_len) 1371 return NULL; 1372 1373 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1374 name_len, 1375 true, 1376 conn->local_nls); 1377 if (IS_ERR(name)) { 1378 pr_err("cannot allocate memory\n"); 1379 return NULL; 1380 } 1381 1382 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1383 user = ksmbd_login_user(name); 1384 kfree(name); 1385 return user; 1386 } 1387 1388 static int ntlm_authenticate(struct ksmbd_work *work) 1389 { 1390 struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf); 1391 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); 1392 struct ksmbd_conn *conn = work->conn; 1393 struct ksmbd_session *sess = work->sess; 1394 struct channel *chann = NULL; 1395 struct ksmbd_user *user; 1396 u64 prev_id; 1397 int sz, rc; 1398 1399 ksmbd_debug(SMB, "authenticate phase\n"); 1400 if (conn->use_spnego) { 1401 unsigned char *spnego_blob; 1402 u16 spnego_blob_len; 1403 1404 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1405 &spnego_blob_len, 1406 0); 1407 if (rc) 1408 return -ENOMEM; 1409 1410 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1411 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1412 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1413 kfree(spnego_blob); 1414 inc_rfc1001_len(work->response_buf, spnego_blob_len - 1); 1415 } 1416 1417 user = session_user(conn, req); 1418 if (!user) { 1419 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1420 return -EPERM; 1421 } 1422 1423 /* Check for previous session */ 1424 prev_id = le64_to_cpu(req->PreviousSessionId); 1425 if (prev_id && prev_id != sess->id) 1426 destroy_previous_session(conn, user, prev_id); 1427 1428 if (sess->state == SMB2_SESSION_VALID) { 1429 /* 1430 * Reuse session if anonymous try to connect 1431 * on reauthetication. 1432 */ 1433 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1434 ksmbd_free_user(user); 1435 return 0; 1436 } 1437 1438 if (!ksmbd_compare_user(sess->user, user)) { 1439 ksmbd_free_user(user); 1440 return -EPERM; 1441 } 1442 ksmbd_free_user(user); 1443 } else { 1444 sess->user = user; 1445 } 1446 1447 if (conn->binding == false && user_guest(sess->user)) { 1448 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1449 } else { 1450 struct authenticate_message *authblob; 1451 1452 authblob = user_authblob(conn, req); 1453 sz = le16_to_cpu(req->SecurityBufferLength); 1454 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1455 if (rc) { 1456 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1457 ksmbd_debug(SMB, "authentication failed\n"); 1458 return -EPERM; 1459 } 1460 } 1461 1462 /* 1463 * If session state is SMB2_SESSION_VALID, We can assume 1464 * that it is reauthentication. And the user/password 1465 * has been verified, so return it here. 1466 */ 1467 if (sess->state == SMB2_SESSION_VALID) { 1468 if (conn->binding) 1469 goto binding_session; 1470 return 0; 1471 } 1472 1473 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1474 (conn->sign || server_conf.enforced_signing)) || 1475 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1476 sess->sign = true; 1477 1478 if (smb3_encryption_negotiated(conn) && 1479 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1480 rc = conn->ops->generate_encryptionkey(conn, sess); 1481 if (rc) { 1482 ksmbd_debug(SMB, 1483 "SMB3 encryption key generation failed\n"); 1484 return -EINVAL; 1485 } 1486 sess->enc = true; 1487 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1488 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1489 /* 1490 * signing is disable if encryption is enable 1491 * on this session 1492 */ 1493 sess->sign = false; 1494 } 1495 1496 binding_session: 1497 if (conn->dialect >= SMB30_PROT_ID) { 1498 chann = lookup_chann_list(sess, conn); 1499 if (!chann) { 1500 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1501 if (!chann) 1502 return -ENOMEM; 1503 1504 chann->conn = conn; 1505 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1506 } 1507 } 1508 1509 if (conn->ops->generate_signingkey) { 1510 rc = conn->ops->generate_signingkey(sess, conn); 1511 if (rc) { 1512 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1513 return -EINVAL; 1514 } 1515 } 1516 1517 if (!ksmbd_conn_lookup_dialect(conn)) { 1518 pr_err("fail to verify the dialect\n"); 1519 return -ENOENT; 1520 } 1521 return 0; 1522 } 1523 1524 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1525 static int krb5_authenticate(struct ksmbd_work *work) 1526 { 1527 struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf); 1528 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); 1529 struct ksmbd_conn *conn = work->conn; 1530 struct ksmbd_session *sess = work->sess; 1531 char *in_blob, *out_blob; 1532 struct channel *chann = NULL; 1533 u64 prev_sess_id; 1534 int in_len, out_len; 1535 int retval; 1536 1537 in_blob = (char *)&req->hdr.ProtocolId + 1538 le16_to_cpu(req->SecurityBufferOffset); 1539 in_len = le16_to_cpu(req->SecurityBufferLength); 1540 out_blob = (char *)&rsp->hdr.ProtocolId + 1541 le16_to_cpu(rsp->SecurityBufferOffset); 1542 out_len = work->response_sz - 1543 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1544 1545 /* Check previous session */ 1546 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1547 if (prev_sess_id && prev_sess_id != sess->id) 1548 destroy_previous_session(conn, sess->user, prev_sess_id); 1549 1550 if (sess->state == SMB2_SESSION_VALID) 1551 ksmbd_free_user(sess->user); 1552 1553 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1554 out_blob, &out_len); 1555 if (retval) { 1556 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1557 return -EINVAL; 1558 } 1559 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1560 inc_rfc1001_len(work->response_buf, out_len - 1); 1561 1562 if ((conn->sign || server_conf.enforced_signing) || 1563 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1564 sess->sign = true; 1565 1566 if (smb3_encryption_negotiated(conn)) { 1567 retval = conn->ops->generate_encryptionkey(conn, sess); 1568 if (retval) { 1569 ksmbd_debug(SMB, 1570 "SMB3 encryption key generation failed\n"); 1571 return -EINVAL; 1572 } 1573 sess->enc = true; 1574 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1575 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1576 sess->sign = false; 1577 } 1578 1579 if (conn->dialect >= SMB30_PROT_ID) { 1580 chann = lookup_chann_list(sess, conn); 1581 if (!chann) { 1582 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1583 if (!chann) 1584 return -ENOMEM; 1585 1586 chann->conn = conn; 1587 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1588 } 1589 } 1590 1591 if (conn->ops->generate_signingkey) { 1592 retval = conn->ops->generate_signingkey(sess, conn); 1593 if (retval) { 1594 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1595 return -EINVAL; 1596 } 1597 } 1598 1599 if (!ksmbd_conn_lookup_dialect(conn)) { 1600 pr_err("fail to verify the dialect\n"); 1601 return -ENOENT; 1602 } 1603 return 0; 1604 } 1605 #else 1606 static int krb5_authenticate(struct ksmbd_work *work) 1607 { 1608 return -EOPNOTSUPP; 1609 } 1610 #endif 1611 1612 int smb2_sess_setup(struct ksmbd_work *work) 1613 { 1614 struct ksmbd_conn *conn = work->conn; 1615 struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf); 1616 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); 1617 struct ksmbd_session *sess; 1618 struct negotiate_message *negblob; 1619 unsigned int negblob_len, negblob_off; 1620 int rc = 0; 1621 1622 ksmbd_debug(SMB, "Received request for session setup\n"); 1623 1624 rsp->StructureSize = cpu_to_le16(9); 1625 rsp->SessionFlags = 0; 1626 rsp->SecurityBufferOffset = cpu_to_le16(72); 1627 rsp->SecurityBufferLength = 0; 1628 inc_rfc1001_len(work->response_buf, 9); 1629 1630 ksmbd_conn_lock(conn); 1631 if (!req->hdr.SessionId) { 1632 sess = ksmbd_smb2_session_create(); 1633 if (!sess) { 1634 rc = -ENOMEM; 1635 goto out_err; 1636 } 1637 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1638 rc = ksmbd_session_register(conn, sess); 1639 if (rc) 1640 goto out_err; 1641 } else if (conn->dialect >= SMB30_PROT_ID && 1642 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1643 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1644 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1645 1646 sess = ksmbd_session_lookup_slowpath(sess_id); 1647 if (!sess) { 1648 rc = -ENOENT; 1649 goto out_err; 1650 } 1651 1652 if (conn->dialect != sess->dialect) { 1653 rc = -EINVAL; 1654 goto out_err; 1655 } 1656 1657 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1658 rc = -EINVAL; 1659 goto out_err; 1660 } 1661 1662 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1663 SMB2_CLIENT_GUID_SIZE)) { 1664 rc = -ENOENT; 1665 goto out_err; 1666 } 1667 1668 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1669 rc = -EACCES; 1670 goto out_err; 1671 } 1672 1673 if (sess->state == SMB2_SESSION_EXPIRED) { 1674 rc = -EFAULT; 1675 goto out_err; 1676 } 1677 1678 if (ksmbd_conn_need_reconnect(conn)) { 1679 rc = -EFAULT; 1680 sess = NULL; 1681 goto out_err; 1682 } 1683 1684 if (ksmbd_session_lookup(conn, sess_id)) { 1685 rc = -EACCES; 1686 goto out_err; 1687 } 1688 1689 if (user_guest(sess->user)) { 1690 rc = -EOPNOTSUPP; 1691 goto out_err; 1692 } 1693 1694 conn->binding = true; 1695 } else if ((conn->dialect < SMB30_PROT_ID || 1696 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1697 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1698 sess = NULL; 1699 rc = -EACCES; 1700 goto out_err; 1701 } else { 1702 sess = ksmbd_session_lookup(conn, 1703 le64_to_cpu(req->hdr.SessionId)); 1704 if (!sess) { 1705 rc = -ENOENT; 1706 goto out_err; 1707 } 1708 1709 if (sess->state == SMB2_SESSION_EXPIRED) { 1710 rc = -EFAULT; 1711 goto out_err; 1712 } 1713 1714 if (ksmbd_conn_need_reconnect(conn)) { 1715 rc = -EFAULT; 1716 sess = NULL; 1717 goto out_err; 1718 } 1719 } 1720 work->sess = sess; 1721 1722 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1723 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1724 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) || 1725 negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1726 rc = -EINVAL; 1727 goto out_err; 1728 } 1729 1730 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1731 negblob_off); 1732 1733 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1734 if (conn->mechToken) 1735 negblob = (struct negotiate_message *)conn->mechToken; 1736 } 1737 1738 if (server_conf.auth_mechs & conn->auth_mechs) { 1739 rc = generate_preauth_hash(work); 1740 if (rc) 1741 goto out_err; 1742 1743 if (conn->preferred_auth_mech & 1744 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1745 rc = krb5_authenticate(work); 1746 if (rc) { 1747 rc = -EINVAL; 1748 goto out_err; 1749 } 1750 1751 if (!ksmbd_conn_need_reconnect(conn)) { 1752 ksmbd_conn_set_good(conn); 1753 sess->state = SMB2_SESSION_VALID; 1754 } 1755 kfree(sess->Preauth_HashValue); 1756 sess->Preauth_HashValue = NULL; 1757 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1758 if (negblob->MessageType == NtLmNegotiate) { 1759 rc = ntlm_negotiate(work, negblob, negblob_len); 1760 if (rc) 1761 goto out_err; 1762 rsp->hdr.Status = 1763 STATUS_MORE_PROCESSING_REQUIRED; 1764 /* 1765 * Note: here total size -1 is done as an 1766 * adjustment for 0 size blob 1767 */ 1768 inc_rfc1001_len(work->response_buf, 1769 le16_to_cpu(rsp->SecurityBufferLength) - 1); 1770 1771 } else if (negblob->MessageType == NtLmAuthenticate) { 1772 rc = ntlm_authenticate(work); 1773 if (rc) 1774 goto out_err; 1775 1776 if (!ksmbd_conn_need_reconnect(conn)) { 1777 ksmbd_conn_set_good(conn); 1778 sess->state = SMB2_SESSION_VALID; 1779 } 1780 if (conn->binding) { 1781 struct preauth_session *preauth_sess; 1782 1783 preauth_sess = 1784 ksmbd_preauth_session_lookup(conn, sess->id); 1785 if (preauth_sess) { 1786 list_del(&preauth_sess->preauth_entry); 1787 kfree(preauth_sess); 1788 } 1789 } 1790 kfree(sess->Preauth_HashValue); 1791 sess->Preauth_HashValue = NULL; 1792 } else { 1793 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1794 le32_to_cpu(negblob->MessageType)); 1795 rc = -EINVAL; 1796 } 1797 } else { 1798 /* TODO: need one more negotiation */ 1799 pr_err("Not support the preferred authentication\n"); 1800 rc = -EINVAL; 1801 } 1802 } else { 1803 pr_err("Not support authentication\n"); 1804 rc = -EINVAL; 1805 } 1806 1807 out_err: 1808 if (rc == -EINVAL) 1809 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1810 else if (rc == -ENOENT) 1811 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1812 else if (rc == -EACCES) 1813 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1814 else if (rc == -EFAULT) 1815 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1816 else if (rc == -ENOMEM) 1817 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1818 else if (rc == -EOPNOTSUPP) 1819 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1820 else if (rc) 1821 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1822 1823 if (conn->use_spnego && conn->mechToken) { 1824 kfree(conn->mechToken); 1825 conn->mechToken = NULL; 1826 } 1827 1828 if (rc < 0) { 1829 /* 1830 * SecurityBufferOffset should be set to zero 1831 * in session setup error response. 1832 */ 1833 rsp->SecurityBufferOffset = 0; 1834 1835 if (sess) { 1836 bool try_delay = false; 1837 1838 /* 1839 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1840 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1841 * failure to make it harder to send enough random connection requests 1842 * to break into a server. 1843 */ 1844 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1845 try_delay = true; 1846 1847 sess->last_active = jiffies; 1848 sess->state = SMB2_SESSION_EXPIRED; 1849 if (try_delay) { 1850 ksmbd_conn_set_need_reconnect(conn); 1851 ssleep(5); 1852 ksmbd_conn_set_need_negotiate(conn); 1853 } 1854 } 1855 } 1856 1857 ksmbd_conn_unlock(conn); 1858 return rc; 1859 } 1860 1861 /** 1862 * smb2_tree_connect() - handler for smb2 tree connect command 1863 * @work: smb work containing smb request buffer 1864 * 1865 * Return: 0 on success, otherwise error 1866 */ 1867 int smb2_tree_connect(struct ksmbd_work *work) 1868 { 1869 struct ksmbd_conn *conn = work->conn; 1870 struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf); 1871 struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf); 1872 struct ksmbd_session *sess = work->sess; 1873 char *treename = NULL, *name = NULL; 1874 struct ksmbd_tree_conn_status status; 1875 struct ksmbd_share_config *share; 1876 int rc = -EINVAL; 1877 1878 treename = smb_strndup_from_utf16(req->Buffer, 1879 le16_to_cpu(req->PathLength), true, 1880 conn->local_nls); 1881 if (IS_ERR(treename)) { 1882 pr_err("treename is NULL\n"); 1883 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1884 goto out_err1; 1885 } 1886 1887 name = ksmbd_extract_sharename(conn->um, treename); 1888 if (IS_ERR(name)) { 1889 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1890 goto out_err1; 1891 } 1892 1893 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 1894 name, treename); 1895 1896 status = ksmbd_tree_conn_connect(conn, sess, name); 1897 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 1898 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 1899 else 1900 goto out_err1; 1901 1902 share = status.tree_conn->share_conf; 1903 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 1904 ksmbd_debug(SMB, "IPC share path request\n"); 1905 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 1906 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1907 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 1908 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 1909 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1910 FILE_SYNCHRONIZE_LE; 1911 } else { 1912 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 1913 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1914 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 1915 if (test_tree_conn_flag(status.tree_conn, 1916 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 1917 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 1918 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 1919 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 1920 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 1921 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1922 FILE_SYNCHRONIZE_LE; 1923 } 1924 } 1925 1926 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 1927 if (conn->posix_ext_supported) 1928 status.tree_conn->posix_extensions = true; 1929 1930 rsp->StructureSize = cpu_to_le16(16); 1931 inc_rfc1001_len(work->response_buf, 16); 1932 out_err1: 1933 rsp->Capabilities = 0; 1934 rsp->Reserved = 0; 1935 /* default manual caching */ 1936 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 1937 1938 if (!IS_ERR(treename)) 1939 kfree(treename); 1940 if (!IS_ERR(name)) 1941 kfree(name); 1942 1943 switch (status.ret) { 1944 case KSMBD_TREE_CONN_STATUS_OK: 1945 rsp->hdr.Status = STATUS_SUCCESS; 1946 rc = 0; 1947 break; 1948 case -ESTALE: 1949 case -ENOENT: 1950 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 1951 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 1952 break; 1953 case -ENOMEM: 1954 case KSMBD_TREE_CONN_STATUS_NOMEM: 1955 rsp->hdr.Status = STATUS_NO_MEMORY; 1956 break; 1957 case KSMBD_TREE_CONN_STATUS_ERROR: 1958 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 1959 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 1960 rsp->hdr.Status = STATUS_ACCESS_DENIED; 1961 break; 1962 case -EINVAL: 1963 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1964 break; 1965 default: 1966 rsp->hdr.Status = STATUS_ACCESS_DENIED; 1967 } 1968 1969 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 1970 smb2_set_err_rsp(work); 1971 1972 return rc; 1973 } 1974 1975 /** 1976 * smb2_create_open_flags() - convert smb open flags to unix open flags 1977 * @file_present: is file already present 1978 * @access: file access flags 1979 * @disposition: file disposition flags 1980 * @may_flags: set with MAY_ flags 1981 * 1982 * Return: file open flags 1983 */ 1984 static int smb2_create_open_flags(bool file_present, __le32 access, 1985 __le32 disposition, 1986 int *may_flags) 1987 { 1988 int oflags = O_NONBLOCK | O_LARGEFILE; 1989 1990 if (access & FILE_READ_DESIRED_ACCESS_LE && 1991 access & FILE_WRITE_DESIRE_ACCESS_LE) { 1992 oflags |= O_RDWR; 1993 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 1994 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 1995 oflags |= O_WRONLY; 1996 *may_flags = MAY_OPEN | MAY_WRITE; 1997 } else { 1998 oflags |= O_RDONLY; 1999 *may_flags = MAY_OPEN | MAY_READ; 2000 } 2001 2002 if (access == FILE_READ_ATTRIBUTES_LE) 2003 oflags |= O_PATH; 2004 2005 if (file_present) { 2006 switch (disposition & FILE_CREATE_MASK_LE) { 2007 case FILE_OPEN_LE: 2008 case FILE_CREATE_LE: 2009 break; 2010 case FILE_SUPERSEDE_LE: 2011 case FILE_OVERWRITE_LE: 2012 case FILE_OVERWRITE_IF_LE: 2013 oflags |= O_TRUNC; 2014 break; 2015 default: 2016 break; 2017 } 2018 } else { 2019 switch (disposition & FILE_CREATE_MASK_LE) { 2020 case FILE_SUPERSEDE_LE: 2021 case FILE_CREATE_LE: 2022 case FILE_OPEN_IF_LE: 2023 case FILE_OVERWRITE_IF_LE: 2024 oflags |= O_CREAT; 2025 break; 2026 case FILE_OPEN_LE: 2027 case FILE_OVERWRITE_LE: 2028 oflags &= ~O_CREAT; 2029 break; 2030 default: 2031 break; 2032 } 2033 } 2034 2035 return oflags; 2036 } 2037 2038 /** 2039 * smb2_tree_disconnect() - handler for smb tree connect request 2040 * @work: smb work containing request buffer 2041 * 2042 * Return: 0 2043 */ 2044 int smb2_tree_disconnect(struct ksmbd_work *work) 2045 { 2046 struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf); 2047 struct ksmbd_session *sess = work->sess; 2048 struct ksmbd_tree_connect *tcon = work->tcon; 2049 2050 rsp->StructureSize = cpu_to_le16(4); 2051 inc_rfc1001_len(work->response_buf, 4); 2052 2053 ksmbd_debug(SMB, "request\n"); 2054 2055 if (!tcon || test_and_set_bit(TREE_CONN_EXPIRE, &tcon->status)) { 2056 struct smb2_tree_disconnect_req *req = 2057 smb2_get_msg(work->request_buf); 2058 2059 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2060 2061 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2062 smb2_set_err_rsp(work); 2063 return 0; 2064 } 2065 2066 ksmbd_close_tree_conn_fds(work); 2067 ksmbd_tree_conn_disconnect(sess, tcon); 2068 work->tcon = NULL; 2069 return 0; 2070 } 2071 2072 /** 2073 * smb2_session_logoff() - handler for session log off request 2074 * @work: smb work containing request buffer 2075 * 2076 * Return: 0 2077 */ 2078 int smb2_session_logoff(struct ksmbd_work *work) 2079 { 2080 struct ksmbd_conn *conn = work->conn; 2081 struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf); 2082 struct ksmbd_session *sess; 2083 struct smb2_logoff_req *req = smb2_get_msg(work->request_buf); 2084 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 2085 2086 rsp->StructureSize = cpu_to_le16(4); 2087 inc_rfc1001_len(work->response_buf, 4); 2088 2089 ksmbd_debug(SMB, "request\n"); 2090 2091 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2092 ksmbd_close_session_fds(work); 2093 ksmbd_conn_wait_idle(conn, sess_id); 2094 2095 /* 2096 * Re-lookup session to validate if session is deleted 2097 * while waiting request complete 2098 */ 2099 sess = ksmbd_session_lookup_all(conn, sess_id); 2100 if (ksmbd_tree_conn_session_logoff(sess)) { 2101 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2102 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2103 smb2_set_err_rsp(work); 2104 return 0; 2105 } 2106 2107 ksmbd_destroy_file_table(&sess->file_table); 2108 sess->state = SMB2_SESSION_EXPIRED; 2109 2110 ksmbd_free_user(sess->user); 2111 sess->user = NULL; 2112 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); 2113 return 0; 2114 } 2115 2116 /** 2117 * create_smb2_pipe() - create IPC pipe 2118 * @work: smb work containing request buffer 2119 * 2120 * Return: 0 on success, otherwise error 2121 */ 2122 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2123 { 2124 struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf); 2125 struct smb2_create_req *req = smb2_get_msg(work->request_buf); 2126 int id; 2127 int err; 2128 char *name; 2129 2130 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2131 1, work->conn->local_nls); 2132 if (IS_ERR(name)) { 2133 rsp->hdr.Status = STATUS_NO_MEMORY; 2134 err = PTR_ERR(name); 2135 goto out; 2136 } 2137 2138 id = ksmbd_session_rpc_open(work->sess, name); 2139 if (id < 0) { 2140 pr_err("Unable to open RPC pipe: %d\n", id); 2141 err = id; 2142 goto out; 2143 } 2144 2145 rsp->hdr.Status = STATUS_SUCCESS; 2146 rsp->StructureSize = cpu_to_le16(89); 2147 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2148 rsp->Flags = 0; 2149 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2150 2151 rsp->CreationTime = cpu_to_le64(0); 2152 rsp->LastAccessTime = cpu_to_le64(0); 2153 rsp->ChangeTime = cpu_to_le64(0); 2154 rsp->AllocationSize = cpu_to_le64(0); 2155 rsp->EndofFile = cpu_to_le64(0); 2156 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2157 rsp->Reserved2 = 0; 2158 rsp->VolatileFileId = id; 2159 rsp->PersistentFileId = 0; 2160 rsp->CreateContextsOffset = 0; 2161 rsp->CreateContextsLength = 0; 2162 2163 inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/ 2164 kfree(name); 2165 return 0; 2166 2167 out: 2168 switch (err) { 2169 case -EINVAL: 2170 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2171 break; 2172 case -ENOSPC: 2173 case -ENOMEM: 2174 rsp->hdr.Status = STATUS_NO_MEMORY; 2175 break; 2176 } 2177 2178 if (!IS_ERR(name)) 2179 kfree(name); 2180 2181 smb2_set_err_rsp(work); 2182 return err; 2183 } 2184 2185 /** 2186 * smb2_set_ea() - handler for setting extended attributes using set 2187 * info command 2188 * @eabuf: set info command buffer 2189 * @buf_len: set info command buffer length 2190 * @path: dentry path for get ea 2191 * 2192 * Return: 0 on success, otherwise error 2193 */ 2194 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2195 const struct path *path) 2196 { 2197 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2198 char *attr_name = NULL, *value; 2199 int rc = 0; 2200 unsigned int next = 0; 2201 2202 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2203 le16_to_cpu(eabuf->EaValueLength)) 2204 return -EINVAL; 2205 2206 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); 2207 if (!attr_name) 2208 return -ENOMEM; 2209 2210 do { 2211 if (!eabuf->EaNameLength) 2212 goto next; 2213 2214 ksmbd_debug(SMB, 2215 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2216 eabuf->name, eabuf->EaNameLength, 2217 le16_to_cpu(eabuf->EaValueLength), 2218 le32_to_cpu(eabuf->NextEntryOffset)); 2219 2220 if (eabuf->EaNameLength > 2221 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2222 rc = -EINVAL; 2223 break; 2224 } 2225 2226 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2227 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2228 eabuf->EaNameLength); 2229 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2230 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2231 2232 if (!eabuf->EaValueLength) { 2233 rc = ksmbd_vfs_casexattr_len(idmap, 2234 path->dentry, 2235 attr_name, 2236 XATTR_USER_PREFIX_LEN + 2237 eabuf->EaNameLength); 2238 2239 /* delete the EA only when it exits */ 2240 if (rc > 0) { 2241 rc = ksmbd_vfs_remove_xattr(idmap, 2242 path->dentry, 2243 attr_name); 2244 2245 if (rc < 0) { 2246 ksmbd_debug(SMB, 2247 "remove xattr failed(%d)\n", 2248 rc); 2249 break; 2250 } 2251 } 2252 2253 /* if the EA doesn't exist, just do nothing. */ 2254 rc = 0; 2255 } else { 2256 rc = ksmbd_vfs_setxattr(idmap, 2257 path->dentry, attr_name, value, 2258 le16_to_cpu(eabuf->EaValueLength), 0); 2259 if (rc < 0) { 2260 ksmbd_debug(SMB, 2261 "ksmbd_vfs_setxattr is failed(%d)\n", 2262 rc); 2263 break; 2264 } 2265 } 2266 2267 next: 2268 next = le32_to_cpu(eabuf->NextEntryOffset); 2269 if (next == 0 || buf_len < next) 2270 break; 2271 buf_len -= next; 2272 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2273 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength)) 2274 break; 2275 2276 } while (next != 0); 2277 2278 kfree(attr_name); 2279 return rc; 2280 } 2281 2282 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2283 struct ksmbd_file *fp, 2284 char *stream_name, int s_type) 2285 { 2286 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2287 size_t xattr_stream_size; 2288 char *xattr_stream_name; 2289 int rc; 2290 2291 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2292 &xattr_stream_name, 2293 &xattr_stream_size, 2294 s_type); 2295 if (rc) 2296 return rc; 2297 2298 fp->stream.name = xattr_stream_name; 2299 fp->stream.size = xattr_stream_size; 2300 2301 /* Check if there is stream prefix in xattr space */ 2302 rc = ksmbd_vfs_casexattr_len(idmap, 2303 path->dentry, 2304 xattr_stream_name, 2305 xattr_stream_size); 2306 if (rc >= 0) 2307 return 0; 2308 2309 if (fp->cdoption == FILE_OPEN_LE) { 2310 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2311 return -EBADF; 2312 } 2313 2314 rc = ksmbd_vfs_setxattr(idmap, path->dentry, 2315 xattr_stream_name, NULL, 0, 0); 2316 if (rc < 0) 2317 pr_err("Failed to store XATTR stream name :%d\n", rc); 2318 return 0; 2319 } 2320 2321 static int smb2_remove_smb_xattrs(const struct path *path) 2322 { 2323 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2324 char *name, *xattr_list = NULL; 2325 ssize_t xattr_list_len; 2326 int err = 0; 2327 2328 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2329 if (xattr_list_len < 0) { 2330 goto out; 2331 } else if (!xattr_list_len) { 2332 ksmbd_debug(SMB, "empty xattr in the file\n"); 2333 goto out; 2334 } 2335 2336 for (name = xattr_list; name - xattr_list < xattr_list_len; 2337 name += strlen(name) + 1) { 2338 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2339 2340 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2341 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2342 STREAM_PREFIX_LEN)) { 2343 err = ksmbd_vfs_remove_xattr(idmap, path->dentry, 2344 name); 2345 if (err) 2346 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2347 name); 2348 } 2349 } 2350 out: 2351 kvfree(xattr_list); 2352 return err; 2353 } 2354 2355 static int smb2_create_truncate(const struct path *path) 2356 { 2357 int rc = vfs_truncate(path, 0); 2358 2359 if (rc) { 2360 pr_err("vfs_truncate failed, rc %d\n", rc); 2361 return rc; 2362 } 2363 2364 rc = smb2_remove_smb_xattrs(path); 2365 if (rc == -EOPNOTSUPP) 2366 rc = 0; 2367 if (rc) 2368 ksmbd_debug(SMB, 2369 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2370 rc); 2371 return rc; 2372 } 2373 2374 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2375 struct ksmbd_file *fp) 2376 { 2377 struct xattr_dos_attrib da = {0}; 2378 int rc; 2379 2380 if (!test_share_config_flag(tcon->share_conf, 2381 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2382 return; 2383 2384 da.version = 4; 2385 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2386 da.itime = da.create_time = fp->create_time; 2387 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2388 XATTR_DOSINFO_ITIME; 2389 2390 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), 2391 path->dentry, &da); 2392 if (rc) 2393 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2394 } 2395 2396 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2397 const struct path *path, struct ksmbd_file *fp) 2398 { 2399 struct xattr_dos_attrib da; 2400 int rc; 2401 2402 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2403 2404 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2405 if (!test_share_config_flag(tcon->share_conf, 2406 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2407 return; 2408 2409 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2410 path->dentry, &da); 2411 if (rc > 0) { 2412 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2413 fp->create_time = da.create_time; 2414 fp->itime = da.itime; 2415 } 2416 } 2417 2418 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name, 2419 int open_flags, umode_t posix_mode, bool is_dir) 2420 { 2421 struct ksmbd_tree_connect *tcon = work->tcon; 2422 struct ksmbd_share_config *share = tcon->share_conf; 2423 umode_t mode; 2424 int rc; 2425 2426 if (!(open_flags & O_CREAT)) 2427 return -EBADF; 2428 2429 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2430 if (is_dir == true) { 2431 ksmbd_debug(SMB, "creating directory\n"); 2432 2433 mode = share_config_directory_mode(share, posix_mode); 2434 rc = ksmbd_vfs_mkdir(work, name, mode); 2435 if (rc) 2436 return rc; 2437 } else { 2438 ksmbd_debug(SMB, "creating regular file\n"); 2439 2440 mode = share_config_create_mode(share, posix_mode); 2441 rc = ksmbd_vfs_create(work, name, mode); 2442 if (rc) 2443 return rc; 2444 } 2445 2446 rc = ksmbd_vfs_kern_path_locked(work, name, 0, path, 0); 2447 if (rc) { 2448 pr_err("cannot get linux path (%s), err = %d\n", 2449 name, rc); 2450 return rc; 2451 } 2452 return 0; 2453 } 2454 2455 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2456 struct smb2_create_req *req, 2457 const struct path *path) 2458 { 2459 struct create_context *context; 2460 struct create_sd_buf_req *sd_buf; 2461 2462 if (!req->CreateContextsOffset) 2463 return -ENOENT; 2464 2465 /* Parse SD BUFFER create contexts */ 2466 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2467 if (!context) 2468 return -ENOENT; 2469 else if (IS_ERR(context)) 2470 return PTR_ERR(context); 2471 2472 ksmbd_debug(SMB, 2473 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2474 sd_buf = (struct create_sd_buf_req *)context; 2475 if (le16_to_cpu(context->DataOffset) + 2476 le32_to_cpu(context->DataLength) < 2477 sizeof(struct create_sd_buf_req)) 2478 return -EINVAL; 2479 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2480 le32_to_cpu(sd_buf->ccontext.DataLength), true); 2481 } 2482 2483 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2484 struct mnt_idmap *idmap, 2485 struct inode *inode) 2486 { 2487 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2488 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2489 2490 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2491 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2492 fattr->cf_mode = inode->i_mode; 2493 fattr->cf_acls = NULL; 2494 fattr->cf_dacls = NULL; 2495 2496 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2497 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2498 if (S_ISDIR(inode->i_mode)) 2499 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2500 } 2501 } 2502 2503 /** 2504 * smb2_open() - handler for smb file open request 2505 * @work: smb work containing request buffer 2506 * 2507 * Return: 0 on success, otherwise error 2508 */ 2509 int smb2_open(struct ksmbd_work *work) 2510 { 2511 struct ksmbd_conn *conn = work->conn; 2512 struct ksmbd_session *sess = work->sess; 2513 struct ksmbd_tree_connect *tcon = work->tcon; 2514 struct smb2_create_req *req; 2515 struct smb2_create_rsp *rsp; 2516 struct path path; 2517 struct ksmbd_share_config *share = tcon->share_conf; 2518 struct ksmbd_file *fp = NULL; 2519 struct file *filp = NULL; 2520 struct mnt_idmap *idmap = NULL; 2521 struct kstat stat; 2522 struct create_context *context; 2523 struct lease_ctx_info *lc = NULL; 2524 struct create_ea_buf_req *ea_buf = NULL; 2525 struct oplock_info *opinfo; 2526 __le32 *next_ptr = NULL; 2527 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2528 int rc = 0; 2529 int contxt_cnt = 0, query_disk_id = 0; 2530 int maximal_access_ctxt = 0, posix_ctxt = 0; 2531 int s_type = 0; 2532 int next_off = 0; 2533 char *name = NULL; 2534 char *stream_name = NULL; 2535 bool file_present = false, created = false, already_permitted = false; 2536 int share_ret, need_truncate = 0; 2537 u64 time; 2538 umode_t posix_mode = 0; 2539 __le32 daccess, maximal_access = 0; 2540 2541 WORK_BUFFERS(work, req, rsp); 2542 2543 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2544 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2545 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2546 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2547 smb2_set_err_rsp(work); 2548 return -EINVAL; 2549 } 2550 2551 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2552 ksmbd_debug(SMB, "IPC pipe create request\n"); 2553 return create_smb2_pipe(work); 2554 } 2555 2556 if (req->NameLength) { 2557 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2558 *(char *)req->Buffer == '\\') { 2559 pr_err("not allow directory name included leading slash\n"); 2560 rc = -EINVAL; 2561 goto err_out1; 2562 } 2563 2564 name = smb2_get_name(req->Buffer, 2565 le16_to_cpu(req->NameLength), 2566 work->conn->local_nls); 2567 if (IS_ERR(name)) { 2568 rc = PTR_ERR(name); 2569 if (rc != -ENOMEM) 2570 rc = -ENOENT; 2571 name = NULL; 2572 goto err_out1; 2573 } 2574 2575 ksmbd_debug(SMB, "converted name = %s\n", name); 2576 if (strchr(name, ':')) { 2577 if (!test_share_config_flag(work->tcon->share_conf, 2578 KSMBD_SHARE_FLAG_STREAMS)) { 2579 rc = -EBADF; 2580 goto err_out1; 2581 } 2582 rc = parse_stream_name(name, &stream_name, &s_type); 2583 if (rc < 0) 2584 goto err_out1; 2585 } 2586 2587 rc = ksmbd_validate_filename(name); 2588 if (rc < 0) 2589 goto err_out1; 2590 2591 if (ksmbd_share_veto_filename(share, name)) { 2592 rc = -ENOENT; 2593 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2594 name); 2595 goto err_out1; 2596 } 2597 } else { 2598 name = kstrdup("", GFP_KERNEL); 2599 if (!name) { 2600 rc = -ENOMEM; 2601 goto err_out1; 2602 } 2603 } 2604 2605 req_op_level = req->RequestedOplockLevel; 2606 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 2607 lc = parse_lease_state(req); 2608 2609 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 2610 pr_err("Invalid impersonationlevel : 0x%x\n", 2611 le32_to_cpu(req->ImpersonationLevel)); 2612 rc = -EIO; 2613 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 2614 goto err_out1; 2615 } 2616 2617 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 2618 pr_err("Invalid create options : 0x%x\n", 2619 le32_to_cpu(req->CreateOptions)); 2620 rc = -EINVAL; 2621 goto err_out1; 2622 } else { 2623 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 2624 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 2625 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 2626 2627 if (req->CreateOptions & 2628 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 2629 FILE_RESERVE_OPFILTER_LE)) { 2630 rc = -EOPNOTSUPP; 2631 goto err_out1; 2632 } 2633 2634 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2635 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 2636 rc = -EINVAL; 2637 goto err_out1; 2638 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 2639 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 2640 } 2641 } 2642 } 2643 2644 if (le32_to_cpu(req->CreateDisposition) > 2645 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 2646 pr_err("Invalid create disposition : 0x%x\n", 2647 le32_to_cpu(req->CreateDisposition)); 2648 rc = -EINVAL; 2649 goto err_out1; 2650 } 2651 2652 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 2653 pr_err("Invalid desired access : 0x%x\n", 2654 le32_to_cpu(req->DesiredAccess)); 2655 rc = -EACCES; 2656 goto err_out1; 2657 } 2658 2659 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 2660 pr_err("Invalid file attribute : 0x%x\n", 2661 le32_to_cpu(req->FileAttributes)); 2662 rc = -EINVAL; 2663 goto err_out1; 2664 } 2665 2666 if (req->CreateContextsOffset) { 2667 /* Parse non-durable handle create contexts */ 2668 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 2669 if (IS_ERR(context)) { 2670 rc = PTR_ERR(context); 2671 goto err_out1; 2672 } else if (context) { 2673 ea_buf = (struct create_ea_buf_req *)context; 2674 if (le16_to_cpu(context->DataOffset) + 2675 le32_to_cpu(context->DataLength) < 2676 sizeof(struct create_ea_buf_req)) { 2677 rc = -EINVAL; 2678 goto err_out1; 2679 } 2680 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 2681 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2682 rc = -EACCES; 2683 goto err_out1; 2684 } 2685 } 2686 2687 context = smb2_find_context_vals(req, 2688 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 2689 if (IS_ERR(context)) { 2690 rc = PTR_ERR(context); 2691 goto err_out1; 2692 } else if (context) { 2693 ksmbd_debug(SMB, 2694 "get query maximal access context\n"); 2695 maximal_access_ctxt = 1; 2696 } 2697 2698 context = smb2_find_context_vals(req, 2699 SMB2_CREATE_TIMEWARP_REQUEST, 4); 2700 if (IS_ERR(context)) { 2701 rc = PTR_ERR(context); 2702 goto err_out1; 2703 } else if (context) { 2704 ksmbd_debug(SMB, "get timewarp context\n"); 2705 rc = -EBADF; 2706 goto err_out1; 2707 } 2708 2709 if (tcon->posix_extensions) { 2710 context = smb2_find_context_vals(req, 2711 SMB2_CREATE_TAG_POSIX, 16); 2712 if (IS_ERR(context)) { 2713 rc = PTR_ERR(context); 2714 goto err_out1; 2715 } else if (context) { 2716 struct create_posix *posix = 2717 (struct create_posix *)context; 2718 if (le16_to_cpu(context->DataOffset) + 2719 le32_to_cpu(context->DataLength) < 2720 sizeof(struct create_posix) - 4) { 2721 rc = -EINVAL; 2722 goto err_out1; 2723 } 2724 ksmbd_debug(SMB, "get posix context\n"); 2725 2726 posix_mode = le32_to_cpu(posix->Mode); 2727 posix_ctxt = 1; 2728 } 2729 } 2730 } 2731 2732 if (ksmbd_override_fsids(work)) { 2733 rc = -ENOMEM; 2734 goto err_out1; 2735 } 2736 2737 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, &path, 1); 2738 if (!rc) { 2739 file_present = true; 2740 2741 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 2742 /* 2743 * If file exists with under flags, return access 2744 * denied error. 2745 */ 2746 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 2747 req->CreateDisposition == FILE_OPEN_IF_LE) { 2748 rc = -EACCES; 2749 goto err_out; 2750 } 2751 2752 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2753 ksmbd_debug(SMB, 2754 "User does not have write permission\n"); 2755 rc = -EACCES; 2756 goto err_out; 2757 } 2758 } else if (d_is_symlink(path.dentry)) { 2759 rc = -EACCES; 2760 goto err_out; 2761 } 2762 2763 file_present = true; 2764 idmap = mnt_idmap(path.mnt); 2765 } else { 2766 if (rc != -ENOENT) 2767 goto err_out; 2768 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 2769 name, rc); 2770 rc = 0; 2771 } 2772 2773 if (stream_name) { 2774 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2775 if (s_type == DATA_STREAM) { 2776 rc = -EIO; 2777 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2778 } 2779 } else { 2780 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 2781 s_type == DATA_STREAM) { 2782 rc = -EIO; 2783 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2784 } 2785 } 2786 2787 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 2788 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 2789 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2790 rc = -EIO; 2791 } 2792 2793 if (rc < 0) 2794 goto err_out; 2795 } 2796 2797 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 2798 S_ISDIR(d_inode(path.dentry)->i_mode) && 2799 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2800 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 2801 name, req->CreateOptions); 2802 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2803 rc = -EIO; 2804 goto err_out; 2805 } 2806 2807 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2808 !(req->CreateDisposition == FILE_CREATE_LE) && 2809 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 2810 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2811 rc = -EIO; 2812 goto err_out; 2813 } 2814 2815 if (!stream_name && file_present && 2816 req->CreateDisposition == FILE_CREATE_LE) { 2817 rc = -EEXIST; 2818 goto err_out; 2819 } 2820 2821 daccess = smb_map_generic_desired_access(req->DesiredAccess); 2822 2823 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2824 rc = smb_check_perm_dacl(conn, &path, &daccess, 2825 sess->user->uid); 2826 if (rc) 2827 goto err_out; 2828 } 2829 2830 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 2831 if (!file_present) { 2832 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 2833 } else { 2834 rc = ksmbd_vfs_query_maximal_access(idmap, 2835 path.dentry, 2836 &daccess); 2837 if (rc) 2838 goto err_out; 2839 already_permitted = true; 2840 } 2841 maximal_access = daccess; 2842 } 2843 2844 open_flags = smb2_create_open_flags(file_present, daccess, 2845 req->CreateDisposition, 2846 &may_flags); 2847 2848 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2849 if (open_flags & O_CREAT) { 2850 ksmbd_debug(SMB, 2851 "User does not have write permission\n"); 2852 rc = -EACCES; 2853 goto err_out; 2854 } 2855 } 2856 2857 /*create file if not present */ 2858 if (!file_present) { 2859 rc = smb2_creat(work, &path, name, open_flags, posix_mode, 2860 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 2861 if (rc) { 2862 if (rc == -ENOENT) { 2863 rc = -EIO; 2864 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 2865 } 2866 goto err_out; 2867 } 2868 2869 created = true; 2870 idmap = mnt_idmap(path.mnt); 2871 if (ea_buf) { 2872 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 2873 sizeof(struct smb2_ea_info)) { 2874 rc = -EINVAL; 2875 goto err_out; 2876 } 2877 2878 rc = smb2_set_ea(&ea_buf->ea, 2879 le32_to_cpu(ea_buf->ccontext.DataLength), 2880 &path); 2881 if (rc == -EOPNOTSUPP) 2882 rc = 0; 2883 else if (rc) 2884 goto err_out; 2885 } 2886 } else if (!already_permitted) { 2887 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 2888 * because execute(search) permission on a parent directory, 2889 * is already granted. 2890 */ 2891 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 2892 rc = inode_permission(idmap, 2893 d_inode(path.dentry), 2894 may_flags); 2895 if (rc) 2896 goto err_out; 2897 2898 if ((daccess & FILE_DELETE_LE) || 2899 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2900 rc = inode_permission(idmap, 2901 d_inode(path.dentry->d_parent), 2902 MAY_EXEC | MAY_WRITE); 2903 if (rc) 2904 goto err_out; 2905 } 2906 } 2907 } 2908 2909 rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent)); 2910 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 2911 rc = -EBUSY; 2912 goto err_out; 2913 } 2914 2915 rc = 0; 2916 filp = dentry_open(&path, open_flags, current_cred()); 2917 if (IS_ERR(filp)) { 2918 rc = PTR_ERR(filp); 2919 pr_err("dentry open for dir failed, rc %d\n", rc); 2920 goto err_out; 2921 } 2922 2923 if (file_present) { 2924 if (!(open_flags & O_TRUNC)) 2925 file_info = FILE_OPENED; 2926 else 2927 file_info = FILE_OVERWRITTEN; 2928 2929 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 2930 FILE_SUPERSEDE_LE) 2931 file_info = FILE_SUPERSEDED; 2932 } else if (open_flags & O_CREAT) { 2933 file_info = FILE_CREATED; 2934 } 2935 2936 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 2937 2938 /* Obtain Volatile-ID */ 2939 fp = ksmbd_open_fd(work, filp); 2940 if (IS_ERR(fp)) { 2941 fput(filp); 2942 rc = PTR_ERR(fp); 2943 fp = NULL; 2944 goto err_out; 2945 } 2946 2947 /* Get Persistent-ID */ 2948 ksmbd_open_durable_fd(fp); 2949 if (!has_file_id(fp->persistent_id)) { 2950 rc = -ENOMEM; 2951 goto err_out; 2952 } 2953 2954 fp->cdoption = req->CreateDisposition; 2955 fp->daccess = daccess; 2956 fp->saccess = req->ShareAccess; 2957 fp->coption = req->CreateOptions; 2958 2959 /* Set default windows and posix acls if creating new file */ 2960 if (created) { 2961 int posix_acl_rc; 2962 struct inode *inode = d_inode(path.dentry); 2963 2964 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 2965 path.dentry, 2966 d_inode(path.dentry->d_parent)); 2967 if (posix_acl_rc) 2968 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 2969 2970 if (test_share_config_flag(work->tcon->share_conf, 2971 KSMBD_SHARE_FLAG_ACL_XATTR)) { 2972 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 2973 sess->user->gid); 2974 } 2975 2976 if (rc) { 2977 rc = smb2_create_sd_buffer(work, req, &path); 2978 if (rc) { 2979 if (posix_acl_rc) 2980 ksmbd_vfs_set_init_posix_acl(idmap, 2981 path.dentry); 2982 2983 if (test_share_config_flag(work->tcon->share_conf, 2984 KSMBD_SHARE_FLAG_ACL_XATTR)) { 2985 struct smb_fattr fattr; 2986 struct smb_ntsd *pntsd; 2987 int pntsd_size, ace_num = 0; 2988 2989 ksmbd_acls_fattr(&fattr, idmap, inode); 2990 if (fattr.cf_acls) 2991 ace_num = fattr.cf_acls->a_count; 2992 if (fattr.cf_dacls) 2993 ace_num += fattr.cf_dacls->a_count; 2994 2995 pntsd = kmalloc(sizeof(struct smb_ntsd) + 2996 sizeof(struct smb_sid) * 3 + 2997 sizeof(struct smb_acl) + 2998 sizeof(struct smb_ace) * ace_num * 2, 2999 GFP_KERNEL); 3000 if (!pntsd) { 3001 posix_acl_release(fattr.cf_acls); 3002 posix_acl_release(fattr.cf_dacls); 3003 goto err_out; 3004 } 3005 3006 rc = build_sec_desc(idmap, 3007 pntsd, NULL, 0, 3008 OWNER_SECINFO | 3009 GROUP_SECINFO | 3010 DACL_SECINFO, 3011 &pntsd_size, &fattr); 3012 posix_acl_release(fattr.cf_acls); 3013 posix_acl_release(fattr.cf_dacls); 3014 if (rc) { 3015 kfree(pntsd); 3016 goto err_out; 3017 } 3018 3019 rc = ksmbd_vfs_set_sd_xattr(conn, 3020 idmap, 3021 path.dentry, 3022 pntsd, 3023 pntsd_size); 3024 kfree(pntsd); 3025 if (rc) 3026 pr_err("failed to store ntacl in xattr : %d\n", 3027 rc); 3028 } 3029 } 3030 } 3031 rc = 0; 3032 } 3033 3034 if (stream_name) { 3035 rc = smb2_set_stream_name_xattr(&path, 3036 fp, 3037 stream_name, 3038 s_type); 3039 if (rc) 3040 goto err_out; 3041 file_info = FILE_CREATED; 3042 } 3043 3044 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3045 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3046 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3047 !fp->attrib_only && !stream_name) { 3048 smb_break_all_oplock(work, fp); 3049 need_truncate = 1; 3050 } 3051 3052 /* fp should be searchable through ksmbd_inode.m_fp_list 3053 * after daccess, saccess, attrib_only, and stream are 3054 * initialized. 3055 */ 3056 write_lock(&fp->f_ci->m_lock); 3057 list_add(&fp->node, &fp->f_ci->m_fp_list); 3058 write_unlock(&fp->f_ci->m_lock); 3059 3060 /* Check delete pending among previous fp before oplock break */ 3061 if (ksmbd_inode_pending_delete(fp)) { 3062 rc = -EBUSY; 3063 goto err_out; 3064 } 3065 3066 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3067 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3068 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3069 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3070 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3071 rc = share_ret; 3072 goto err_out; 3073 } 3074 } else { 3075 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) { 3076 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3077 ksmbd_debug(SMB, 3078 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3079 name, req_op_level, lc->req_state); 3080 rc = find_same_lease_key(sess, fp->f_ci, lc); 3081 if (rc) 3082 goto err_out; 3083 } else if (open_flags == O_RDONLY && 3084 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3085 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3086 req_op_level = SMB2_OPLOCK_LEVEL_II; 3087 3088 rc = smb_grant_oplock(work, req_op_level, 3089 fp->persistent_id, fp, 3090 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3091 lc, share_ret); 3092 if (rc < 0) 3093 goto err_out; 3094 } 3095 3096 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3097 ksmbd_fd_set_delete_on_close(fp, file_info); 3098 3099 if (need_truncate) { 3100 rc = smb2_create_truncate(&path); 3101 if (rc) 3102 goto err_out; 3103 } 3104 3105 if (req->CreateContextsOffset) { 3106 struct create_alloc_size_req *az_req; 3107 3108 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3109 SMB2_CREATE_ALLOCATION_SIZE, 4); 3110 if (IS_ERR(az_req)) { 3111 rc = PTR_ERR(az_req); 3112 goto err_out; 3113 } else if (az_req) { 3114 loff_t alloc_size; 3115 int err; 3116 3117 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3118 le32_to_cpu(az_req->ccontext.DataLength) < 3119 sizeof(struct create_alloc_size_req)) { 3120 rc = -EINVAL; 3121 goto err_out; 3122 } 3123 alloc_size = le64_to_cpu(az_req->AllocationSize); 3124 ksmbd_debug(SMB, 3125 "request smb2 create allocate size : %llu\n", 3126 alloc_size); 3127 smb_break_all_levII_oplock(work, fp, 1); 3128 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3129 alloc_size); 3130 if (err < 0) 3131 ksmbd_debug(SMB, 3132 "vfs_fallocate is failed : %d\n", 3133 err); 3134 } 3135 3136 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3137 if (IS_ERR(context)) { 3138 rc = PTR_ERR(context); 3139 goto err_out; 3140 } else if (context) { 3141 ksmbd_debug(SMB, "get query on disk id context\n"); 3142 query_disk_id = 1; 3143 } 3144 } 3145 3146 rc = ksmbd_vfs_getattr(&path, &stat); 3147 if (rc) 3148 goto err_out; 3149 3150 if (stat.result_mask & STATX_BTIME) 3151 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3152 else 3153 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3154 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3155 fp->f_ci->m_fattr = 3156 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3157 3158 if (!created) 3159 smb2_update_xattrs(tcon, &path, fp); 3160 else 3161 smb2_new_xattrs(tcon, &path, fp); 3162 3163 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3164 3165 rsp->StructureSize = cpu_to_le16(89); 3166 rcu_read_lock(); 3167 opinfo = rcu_dereference(fp->f_opinfo); 3168 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3169 rcu_read_unlock(); 3170 rsp->Flags = 0; 3171 rsp->CreateAction = cpu_to_le32(file_info); 3172 rsp->CreationTime = cpu_to_le64(fp->create_time); 3173 time = ksmbd_UnixTimeToNT(stat.atime); 3174 rsp->LastAccessTime = cpu_to_le64(time); 3175 time = ksmbd_UnixTimeToNT(stat.mtime); 3176 rsp->LastWriteTime = cpu_to_le64(time); 3177 time = ksmbd_UnixTimeToNT(stat.ctime); 3178 rsp->ChangeTime = cpu_to_le64(time); 3179 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3180 cpu_to_le64(stat.blocks << 9); 3181 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3182 rsp->FileAttributes = fp->f_ci->m_fattr; 3183 3184 rsp->Reserved2 = 0; 3185 3186 rsp->PersistentFileId = fp->persistent_id; 3187 rsp->VolatileFileId = fp->volatile_id; 3188 3189 rsp->CreateContextsOffset = 0; 3190 rsp->CreateContextsLength = 0; 3191 inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/ 3192 3193 /* If lease is request send lease context response */ 3194 if (opinfo && opinfo->is_lease) { 3195 struct create_context *lease_ccontext; 3196 3197 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3198 name, opinfo->o_lease->state); 3199 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3200 3201 lease_ccontext = (struct create_context *)rsp->Buffer; 3202 contxt_cnt++; 3203 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3204 le32_add_cpu(&rsp->CreateContextsLength, 3205 conn->vals->create_lease_size); 3206 inc_rfc1001_len(work->response_buf, 3207 conn->vals->create_lease_size); 3208 next_ptr = &lease_ccontext->Next; 3209 next_off = conn->vals->create_lease_size; 3210 } 3211 3212 if (maximal_access_ctxt) { 3213 struct create_context *mxac_ccontext; 3214 3215 if (maximal_access == 0) 3216 ksmbd_vfs_query_maximal_access(idmap, 3217 path.dentry, 3218 &maximal_access); 3219 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3220 le32_to_cpu(rsp->CreateContextsLength)); 3221 contxt_cnt++; 3222 create_mxac_rsp_buf(rsp->Buffer + 3223 le32_to_cpu(rsp->CreateContextsLength), 3224 le32_to_cpu(maximal_access)); 3225 le32_add_cpu(&rsp->CreateContextsLength, 3226 conn->vals->create_mxac_size); 3227 inc_rfc1001_len(work->response_buf, 3228 conn->vals->create_mxac_size); 3229 if (next_ptr) 3230 *next_ptr = cpu_to_le32(next_off); 3231 next_ptr = &mxac_ccontext->Next; 3232 next_off = conn->vals->create_mxac_size; 3233 } 3234 3235 if (query_disk_id) { 3236 struct create_context *disk_id_ccontext; 3237 3238 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3239 le32_to_cpu(rsp->CreateContextsLength)); 3240 contxt_cnt++; 3241 create_disk_id_rsp_buf(rsp->Buffer + 3242 le32_to_cpu(rsp->CreateContextsLength), 3243 stat.ino, tcon->id); 3244 le32_add_cpu(&rsp->CreateContextsLength, 3245 conn->vals->create_disk_id_size); 3246 inc_rfc1001_len(work->response_buf, 3247 conn->vals->create_disk_id_size); 3248 if (next_ptr) 3249 *next_ptr = cpu_to_le32(next_off); 3250 next_ptr = &disk_id_ccontext->Next; 3251 next_off = conn->vals->create_disk_id_size; 3252 } 3253 3254 if (posix_ctxt) { 3255 contxt_cnt++; 3256 create_posix_rsp_buf(rsp->Buffer + 3257 le32_to_cpu(rsp->CreateContextsLength), 3258 fp); 3259 le32_add_cpu(&rsp->CreateContextsLength, 3260 conn->vals->create_posix_size); 3261 inc_rfc1001_len(work->response_buf, 3262 conn->vals->create_posix_size); 3263 if (next_ptr) 3264 *next_ptr = cpu_to_le32(next_off); 3265 } 3266 3267 if (contxt_cnt > 0) { 3268 rsp->CreateContextsOffset = 3269 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3270 } 3271 3272 err_out: 3273 if (file_present || created) { 3274 inode_unlock(d_inode(path.dentry->d_parent)); 3275 dput(path.dentry); 3276 } 3277 ksmbd_revert_fsids(work); 3278 err_out1: 3279 3280 if (rc) { 3281 if (rc == -EINVAL) 3282 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3283 else if (rc == -EOPNOTSUPP) 3284 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3285 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3286 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3287 else if (rc == -ENOENT) 3288 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3289 else if (rc == -EPERM) 3290 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3291 else if (rc == -EBUSY) 3292 rsp->hdr.Status = STATUS_DELETE_PENDING; 3293 else if (rc == -EBADF) 3294 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3295 else if (rc == -ENOEXEC) 3296 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3297 else if (rc == -ENXIO) 3298 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3299 else if (rc == -EEXIST) 3300 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3301 else if (rc == -EMFILE) 3302 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3303 if (!rsp->hdr.Status) 3304 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3305 3306 if (fp) 3307 ksmbd_fd_put(work, fp); 3308 smb2_set_err_rsp(work); 3309 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3310 } 3311 3312 kfree(name); 3313 kfree(lc); 3314 3315 return 0; 3316 } 3317 3318 static int readdir_info_level_struct_sz(int info_level) 3319 { 3320 switch (info_level) { 3321 case FILE_FULL_DIRECTORY_INFORMATION: 3322 return sizeof(struct file_full_directory_info); 3323 case FILE_BOTH_DIRECTORY_INFORMATION: 3324 return sizeof(struct file_both_directory_info); 3325 case FILE_DIRECTORY_INFORMATION: 3326 return sizeof(struct file_directory_info); 3327 case FILE_NAMES_INFORMATION: 3328 return sizeof(struct file_names_info); 3329 case FILEID_FULL_DIRECTORY_INFORMATION: 3330 return sizeof(struct file_id_full_dir_info); 3331 case FILEID_BOTH_DIRECTORY_INFORMATION: 3332 return sizeof(struct file_id_both_directory_info); 3333 case SMB_FIND_FILE_POSIX_INFO: 3334 return sizeof(struct smb2_posix_info); 3335 default: 3336 return -EOPNOTSUPP; 3337 } 3338 } 3339 3340 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3341 { 3342 switch (info_level) { 3343 case FILE_FULL_DIRECTORY_INFORMATION: 3344 { 3345 struct file_full_directory_info *ffdinfo; 3346 3347 ffdinfo = (struct file_full_directory_info *)d_info->rptr; 3348 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3349 d_info->name = ffdinfo->FileName; 3350 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3351 return 0; 3352 } 3353 case FILE_BOTH_DIRECTORY_INFORMATION: 3354 { 3355 struct file_both_directory_info *fbdinfo; 3356 3357 fbdinfo = (struct file_both_directory_info *)d_info->rptr; 3358 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3359 d_info->name = fbdinfo->FileName; 3360 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3361 return 0; 3362 } 3363 case FILE_DIRECTORY_INFORMATION: 3364 { 3365 struct file_directory_info *fdinfo; 3366 3367 fdinfo = (struct file_directory_info *)d_info->rptr; 3368 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3369 d_info->name = fdinfo->FileName; 3370 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3371 return 0; 3372 } 3373 case FILE_NAMES_INFORMATION: 3374 { 3375 struct file_names_info *fninfo; 3376 3377 fninfo = (struct file_names_info *)d_info->rptr; 3378 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3379 d_info->name = fninfo->FileName; 3380 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3381 return 0; 3382 } 3383 case FILEID_FULL_DIRECTORY_INFORMATION: 3384 { 3385 struct file_id_full_dir_info *dinfo; 3386 3387 dinfo = (struct file_id_full_dir_info *)d_info->rptr; 3388 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3389 d_info->name = dinfo->FileName; 3390 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3391 return 0; 3392 } 3393 case FILEID_BOTH_DIRECTORY_INFORMATION: 3394 { 3395 struct file_id_both_directory_info *fibdinfo; 3396 3397 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3398 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3399 d_info->name = fibdinfo->FileName; 3400 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3401 return 0; 3402 } 3403 case SMB_FIND_FILE_POSIX_INFO: 3404 { 3405 struct smb2_posix_info *posix_info; 3406 3407 posix_info = (struct smb2_posix_info *)d_info->rptr; 3408 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3409 d_info->name = posix_info->name; 3410 d_info->name_len = le32_to_cpu(posix_info->name_len); 3411 return 0; 3412 } 3413 default: 3414 return -EINVAL; 3415 } 3416 } 3417 3418 /** 3419 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3420 * buffer 3421 * @conn: connection instance 3422 * @info_level: smb information level 3423 * @d_info: structure included variables for query dir 3424 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3425 * 3426 * if directory has many entries, find first can't read it fully. 3427 * find next might be called multiple times to read remaining dir entries 3428 * 3429 * Return: 0 on success, otherwise error 3430 */ 3431 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3432 struct ksmbd_dir_info *d_info, 3433 struct ksmbd_kstat *ksmbd_kstat) 3434 { 3435 int next_entry_offset = 0; 3436 char *conv_name; 3437 int conv_len; 3438 void *kstat; 3439 int struct_sz, rc = 0; 3440 3441 conv_name = ksmbd_convert_dir_info_name(d_info, 3442 conn->local_nls, 3443 &conv_len); 3444 if (!conv_name) 3445 return -ENOMEM; 3446 3447 /* Somehow the name has only terminating NULL bytes */ 3448 if (conv_len < 0) { 3449 rc = -EINVAL; 3450 goto free_conv_name; 3451 } 3452 3453 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3454 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3455 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3456 3457 if (next_entry_offset > d_info->out_buf_len) { 3458 d_info->out_buf_len = 0; 3459 rc = -ENOSPC; 3460 goto free_conv_name; 3461 } 3462 3463 kstat = d_info->wptr; 3464 if (info_level != FILE_NAMES_INFORMATION) 3465 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3466 3467 switch (info_level) { 3468 case FILE_FULL_DIRECTORY_INFORMATION: 3469 { 3470 struct file_full_directory_info *ffdinfo; 3471 3472 ffdinfo = (struct file_full_directory_info *)kstat; 3473 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3474 ffdinfo->EaSize = 3475 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3476 if (ffdinfo->EaSize) 3477 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3478 if (d_info->hide_dot_file && d_info->name[0] == '.') 3479 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3480 memcpy(ffdinfo->FileName, conv_name, conv_len); 3481 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3482 break; 3483 } 3484 case FILE_BOTH_DIRECTORY_INFORMATION: 3485 { 3486 struct file_both_directory_info *fbdinfo; 3487 3488 fbdinfo = (struct file_both_directory_info *)kstat; 3489 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3490 fbdinfo->EaSize = 3491 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3492 if (fbdinfo->EaSize) 3493 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3494 fbdinfo->ShortNameLength = 0; 3495 fbdinfo->Reserved = 0; 3496 if (d_info->hide_dot_file && d_info->name[0] == '.') 3497 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3498 memcpy(fbdinfo->FileName, conv_name, conv_len); 3499 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3500 break; 3501 } 3502 case FILE_DIRECTORY_INFORMATION: 3503 { 3504 struct file_directory_info *fdinfo; 3505 3506 fdinfo = (struct file_directory_info *)kstat; 3507 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3508 if (d_info->hide_dot_file && d_info->name[0] == '.') 3509 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3510 memcpy(fdinfo->FileName, conv_name, conv_len); 3511 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3512 break; 3513 } 3514 case FILE_NAMES_INFORMATION: 3515 { 3516 struct file_names_info *fninfo; 3517 3518 fninfo = (struct file_names_info *)kstat; 3519 fninfo->FileNameLength = cpu_to_le32(conv_len); 3520 memcpy(fninfo->FileName, conv_name, conv_len); 3521 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3522 break; 3523 } 3524 case FILEID_FULL_DIRECTORY_INFORMATION: 3525 { 3526 struct file_id_full_dir_info *dinfo; 3527 3528 dinfo = (struct file_id_full_dir_info *)kstat; 3529 dinfo->FileNameLength = cpu_to_le32(conv_len); 3530 dinfo->EaSize = 3531 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3532 if (dinfo->EaSize) 3533 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3534 dinfo->Reserved = 0; 3535 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3536 if (d_info->hide_dot_file && d_info->name[0] == '.') 3537 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3538 memcpy(dinfo->FileName, conv_name, conv_len); 3539 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3540 break; 3541 } 3542 case FILEID_BOTH_DIRECTORY_INFORMATION: 3543 { 3544 struct file_id_both_directory_info *fibdinfo; 3545 3546 fibdinfo = (struct file_id_both_directory_info *)kstat; 3547 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 3548 fibdinfo->EaSize = 3549 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3550 if (fibdinfo->EaSize) 3551 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3552 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3553 fibdinfo->ShortNameLength = 0; 3554 fibdinfo->Reserved = 0; 3555 fibdinfo->Reserved2 = cpu_to_le16(0); 3556 if (d_info->hide_dot_file && d_info->name[0] == '.') 3557 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3558 memcpy(fibdinfo->FileName, conv_name, conv_len); 3559 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3560 break; 3561 } 3562 case SMB_FIND_FILE_POSIX_INFO: 3563 { 3564 struct smb2_posix_info *posix_info; 3565 u64 time; 3566 3567 posix_info = (struct smb2_posix_info *)kstat; 3568 posix_info->Ignored = 0; 3569 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 3570 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 3571 posix_info->ChangeTime = cpu_to_le64(time); 3572 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 3573 posix_info->LastAccessTime = cpu_to_le64(time); 3574 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 3575 posix_info->LastWriteTime = cpu_to_le64(time); 3576 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 3577 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 3578 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 3579 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 3580 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 3581 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 3582 posix_info->DosAttributes = 3583 S_ISDIR(ksmbd_kstat->kstat->mode) ? 3584 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 3585 if (d_info->hide_dot_file && d_info->name[0] == '.') 3586 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3587 /* 3588 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 3589 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 3590 * sub_auth(4 * 1(num_subauth)) + RID(4). 3591 */ 3592 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 3593 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 3594 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 3595 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 3596 memcpy(posix_info->name, conv_name, conv_len); 3597 posix_info->name_len = cpu_to_le32(conv_len); 3598 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 3599 break; 3600 } 3601 3602 } /* switch (info_level) */ 3603 3604 d_info->last_entry_offset = d_info->data_count; 3605 d_info->data_count += next_entry_offset; 3606 d_info->out_buf_len -= next_entry_offset; 3607 d_info->wptr += next_entry_offset; 3608 3609 ksmbd_debug(SMB, 3610 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 3611 info_level, d_info->out_buf_len, 3612 next_entry_offset, d_info->data_count); 3613 3614 free_conv_name: 3615 kfree(conv_name); 3616 return rc; 3617 } 3618 3619 struct smb2_query_dir_private { 3620 struct ksmbd_work *work; 3621 char *search_pattern; 3622 struct ksmbd_file *dir_fp; 3623 3624 struct ksmbd_dir_info *d_info; 3625 int info_level; 3626 }; 3627 3628 static void lock_dir(struct ksmbd_file *dir_fp) 3629 { 3630 struct dentry *dir = dir_fp->filp->f_path.dentry; 3631 3632 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); 3633 } 3634 3635 static void unlock_dir(struct ksmbd_file *dir_fp) 3636 { 3637 struct dentry *dir = dir_fp->filp->f_path.dentry; 3638 3639 inode_unlock(d_inode(dir)); 3640 } 3641 3642 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 3643 { 3644 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 3645 struct kstat kstat; 3646 struct ksmbd_kstat ksmbd_kstat; 3647 int rc; 3648 int i; 3649 3650 for (i = 0; i < priv->d_info->num_entry; i++) { 3651 struct dentry *dent; 3652 3653 if (dentry_name(priv->d_info, priv->info_level)) 3654 return -EINVAL; 3655 3656 lock_dir(priv->dir_fp); 3657 dent = lookup_one(idmap, priv->d_info->name, 3658 priv->dir_fp->filp->f_path.dentry, 3659 priv->d_info->name_len); 3660 unlock_dir(priv->dir_fp); 3661 3662 if (IS_ERR(dent)) { 3663 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 3664 priv->d_info->name, 3665 PTR_ERR(dent)); 3666 continue; 3667 } 3668 if (unlikely(d_is_negative(dent))) { 3669 dput(dent); 3670 ksmbd_debug(SMB, "Negative dentry `%s'\n", 3671 priv->d_info->name); 3672 continue; 3673 } 3674 3675 ksmbd_kstat.kstat = &kstat; 3676 if (priv->info_level != FILE_NAMES_INFORMATION) 3677 ksmbd_vfs_fill_dentry_attrs(priv->work, 3678 idmap, 3679 dent, 3680 &ksmbd_kstat); 3681 3682 rc = smb2_populate_readdir_entry(priv->work->conn, 3683 priv->info_level, 3684 priv->d_info, 3685 &ksmbd_kstat); 3686 dput(dent); 3687 if (rc) 3688 return rc; 3689 } 3690 return 0; 3691 } 3692 3693 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 3694 int info_level) 3695 { 3696 int struct_sz; 3697 int conv_len; 3698 int next_entry_offset; 3699 3700 struct_sz = readdir_info_level_struct_sz(info_level); 3701 if (struct_sz == -EOPNOTSUPP) 3702 return -EOPNOTSUPP; 3703 3704 conv_len = (d_info->name_len + 1) * 2; 3705 next_entry_offset = ALIGN(struct_sz + conv_len, 3706 KSMBD_DIR_INFO_ALIGNMENT); 3707 3708 if (next_entry_offset > d_info->out_buf_len) { 3709 d_info->out_buf_len = 0; 3710 return -ENOSPC; 3711 } 3712 3713 switch (info_level) { 3714 case FILE_FULL_DIRECTORY_INFORMATION: 3715 { 3716 struct file_full_directory_info *ffdinfo; 3717 3718 ffdinfo = (struct file_full_directory_info *)d_info->wptr; 3719 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 3720 ffdinfo->FileName[d_info->name_len] = 0x00; 3721 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3722 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3723 break; 3724 } 3725 case FILE_BOTH_DIRECTORY_INFORMATION: 3726 { 3727 struct file_both_directory_info *fbdinfo; 3728 3729 fbdinfo = (struct file_both_directory_info *)d_info->wptr; 3730 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 3731 fbdinfo->FileName[d_info->name_len] = 0x00; 3732 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3733 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3734 break; 3735 } 3736 case FILE_DIRECTORY_INFORMATION: 3737 { 3738 struct file_directory_info *fdinfo; 3739 3740 fdinfo = (struct file_directory_info *)d_info->wptr; 3741 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 3742 fdinfo->FileName[d_info->name_len] = 0x00; 3743 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3744 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3745 break; 3746 } 3747 case FILE_NAMES_INFORMATION: 3748 { 3749 struct file_names_info *fninfo; 3750 3751 fninfo = (struct file_names_info *)d_info->wptr; 3752 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 3753 fninfo->FileName[d_info->name_len] = 0x00; 3754 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 3755 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3756 break; 3757 } 3758 case FILEID_FULL_DIRECTORY_INFORMATION: 3759 { 3760 struct file_id_full_dir_info *dinfo; 3761 3762 dinfo = (struct file_id_full_dir_info *)d_info->wptr; 3763 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 3764 dinfo->FileName[d_info->name_len] = 0x00; 3765 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3766 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3767 break; 3768 } 3769 case FILEID_BOTH_DIRECTORY_INFORMATION: 3770 { 3771 struct file_id_both_directory_info *fibdinfo; 3772 3773 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 3774 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 3775 fibdinfo->FileName[d_info->name_len] = 0x00; 3776 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3777 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3778 break; 3779 } 3780 case SMB_FIND_FILE_POSIX_INFO: 3781 { 3782 struct smb2_posix_info *posix_info; 3783 3784 posix_info = (struct smb2_posix_info *)d_info->wptr; 3785 memcpy(posix_info->name, d_info->name, d_info->name_len); 3786 posix_info->name[d_info->name_len] = 0x00; 3787 posix_info->name_len = cpu_to_le32(d_info->name_len); 3788 posix_info->NextEntryOffset = 3789 cpu_to_le32(next_entry_offset); 3790 break; 3791 } 3792 } /* switch (info_level) */ 3793 3794 d_info->num_entry++; 3795 d_info->out_buf_len -= next_entry_offset; 3796 d_info->wptr += next_entry_offset; 3797 return 0; 3798 } 3799 3800 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 3801 loff_t offset, u64 ino, unsigned int d_type) 3802 { 3803 struct ksmbd_readdir_data *buf; 3804 struct smb2_query_dir_private *priv; 3805 struct ksmbd_dir_info *d_info; 3806 int rc; 3807 3808 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 3809 priv = buf->private; 3810 d_info = priv->d_info; 3811 3812 /* dot and dotdot entries are already reserved */ 3813 if (!strcmp(".", name) || !strcmp("..", name)) 3814 return true; 3815 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 3816 return true; 3817 if (!match_pattern(name, namlen, priv->search_pattern)) 3818 return true; 3819 3820 d_info->name = name; 3821 d_info->name_len = namlen; 3822 rc = reserve_populate_dentry(d_info, priv->info_level); 3823 if (rc) 3824 return false; 3825 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 3826 d_info->out_buf_len = 0; 3827 return true; 3828 } 3829 3830 static int verify_info_level(int info_level) 3831 { 3832 switch (info_level) { 3833 case FILE_FULL_DIRECTORY_INFORMATION: 3834 case FILE_BOTH_DIRECTORY_INFORMATION: 3835 case FILE_DIRECTORY_INFORMATION: 3836 case FILE_NAMES_INFORMATION: 3837 case FILEID_FULL_DIRECTORY_INFORMATION: 3838 case FILEID_BOTH_DIRECTORY_INFORMATION: 3839 case SMB_FIND_FILE_POSIX_INFO: 3840 break; 3841 default: 3842 return -EOPNOTSUPP; 3843 } 3844 3845 return 0; 3846 } 3847 3848 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 3849 { 3850 int free_len; 3851 3852 free_len = (int)(work->response_sz - 3853 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 3854 return free_len; 3855 } 3856 3857 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 3858 unsigned short hdr2_len, 3859 unsigned int out_buf_len) 3860 { 3861 int free_len; 3862 3863 if (out_buf_len > work->conn->vals->max_trans_size) 3864 return -EINVAL; 3865 3866 free_len = smb2_resp_buf_len(work, hdr2_len); 3867 if (free_len < 0) 3868 return -EINVAL; 3869 3870 return min_t(int, out_buf_len, free_len); 3871 } 3872 3873 int smb2_query_dir(struct ksmbd_work *work) 3874 { 3875 struct ksmbd_conn *conn = work->conn; 3876 struct smb2_query_directory_req *req; 3877 struct smb2_query_directory_rsp *rsp; 3878 struct ksmbd_share_config *share = work->tcon->share_conf; 3879 struct ksmbd_file *dir_fp = NULL; 3880 struct ksmbd_dir_info d_info; 3881 int rc = 0; 3882 char *srch_ptr = NULL; 3883 unsigned char srch_flag; 3884 int buffer_sz; 3885 struct smb2_query_dir_private query_dir_private = {NULL, }; 3886 3887 WORK_BUFFERS(work, req, rsp); 3888 3889 if (ksmbd_override_fsids(work)) { 3890 rsp->hdr.Status = STATUS_NO_MEMORY; 3891 smb2_set_err_rsp(work); 3892 return -ENOMEM; 3893 } 3894 3895 rc = verify_info_level(req->FileInformationClass); 3896 if (rc) { 3897 rc = -EFAULT; 3898 goto err_out2; 3899 } 3900 3901 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 3902 if (!dir_fp) { 3903 rc = -EBADF; 3904 goto err_out2; 3905 } 3906 3907 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 3908 inode_permission(file_mnt_idmap(dir_fp->filp), 3909 file_inode(dir_fp->filp), 3910 MAY_READ | MAY_EXEC)) { 3911 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 3912 rc = -EACCES; 3913 goto err_out2; 3914 } 3915 3916 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 3917 pr_err("can't do query dir for a file\n"); 3918 rc = -EINVAL; 3919 goto err_out2; 3920 } 3921 3922 srch_flag = req->Flags; 3923 srch_ptr = smb_strndup_from_utf16(req->Buffer, 3924 le16_to_cpu(req->FileNameLength), 1, 3925 conn->local_nls); 3926 if (IS_ERR(srch_ptr)) { 3927 ksmbd_debug(SMB, "Search Pattern not found\n"); 3928 rc = -EINVAL; 3929 goto err_out2; 3930 } else { 3931 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 3932 } 3933 3934 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 3935 ksmbd_debug(SMB, "Restart directory scan\n"); 3936 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 3937 } 3938 3939 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 3940 d_info.wptr = (char *)rsp->Buffer; 3941 d_info.rptr = (char *)rsp->Buffer; 3942 d_info.out_buf_len = 3943 smb2_calc_max_out_buf_len(work, 8, 3944 le32_to_cpu(req->OutputBufferLength)); 3945 if (d_info.out_buf_len < 0) { 3946 rc = -EINVAL; 3947 goto err_out; 3948 } 3949 d_info.flags = srch_flag; 3950 3951 /* 3952 * reserve dot and dotdot entries in head of buffer 3953 * in first response 3954 */ 3955 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 3956 dir_fp, &d_info, srch_ptr, 3957 smb2_populate_readdir_entry); 3958 if (rc == -ENOSPC) 3959 rc = 0; 3960 else if (rc) 3961 goto err_out; 3962 3963 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 3964 d_info.hide_dot_file = true; 3965 3966 buffer_sz = d_info.out_buf_len; 3967 d_info.rptr = d_info.wptr; 3968 query_dir_private.work = work; 3969 query_dir_private.search_pattern = srch_ptr; 3970 query_dir_private.dir_fp = dir_fp; 3971 query_dir_private.d_info = &d_info; 3972 query_dir_private.info_level = req->FileInformationClass; 3973 dir_fp->readdir_data.private = &query_dir_private; 3974 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 3975 3976 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 3977 /* 3978 * req->OutputBufferLength is too small to contain even one entry. 3979 * In this case, it immediately returns OutputBufferLength 0 to client. 3980 */ 3981 if (!d_info.out_buf_len && !d_info.num_entry) 3982 goto no_buf_len; 3983 if (rc > 0 || rc == -ENOSPC) 3984 rc = 0; 3985 else if (rc) 3986 goto err_out; 3987 3988 d_info.wptr = d_info.rptr; 3989 d_info.out_buf_len = buffer_sz; 3990 rc = process_query_dir_entries(&query_dir_private); 3991 if (rc) 3992 goto err_out; 3993 3994 if (!d_info.data_count && d_info.out_buf_len >= 0) { 3995 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 3996 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 3997 } else { 3998 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 3999 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4000 } 4001 rsp->StructureSize = cpu_to_le16(9); 4002 rsp->OutputBufferOffset = cpu_to_le16(0); 4003 rsp->OutputBufferLength = cpu_to_le32(0); 4004 rsp->Buffer[0] = 0; 4005 inc_rfc1001_len(work->response_buf, 9); 4006 } else { 4007 no_buf_len: 4008 ((struct file_directory_info *) 4009 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4010 ->NextEntryOffset = 0; 4011 if (d_info.data_count >= d_info.last_entry_off_align) 4012 d_info.data_count -= d_info.last_entry_off_align; 4013 4014 rsp->StructureSize = cpu_to_le16(9); 4015 rsp->OutputBufferOffset = cpu_to_le16(72); 4016 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4017 inc_rfc1001_len(work->response_buf, 8 + d_info.data_count); 4018 } 4019 4020 kfree(srch_ptr); 4021 ksmbd_fd_put(work, dir_fp); 4022 ksmbd_revert_fsids(work); 4023 return 0; 4024 4025 err_out: 4026 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4027 kfree(srch_ptr); 4028 4029 err_out2: 4030 if (rc == -EINVAL) 4031 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4032 else if (rc == -EACCES) 4033 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4034 else if (rc == -ENOENT) 4035 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4036 else if (rc == -EBADF) 4037 rsp->hdr.Status = STATUS_FILE_CLOSED; 4038 else if (rc == -ENOMEM) 4039 rsp->hdr.Status = STATUS_NO_MEMORY; 4040 else if (rc == -EFAULT) 4041 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4042 else if (rc == -EIO) 4043 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4044 if (!rsp->hdr.Status) 4045 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4046 4047 smb2_set_err_rsp(work); 4048 ksmbd_fd_put(work, dir_fp); 4049 ksmbd_revert_fsids(work); 4050 return 0; 4051 } 4052 4053 /** 4054 * buffer_check_err() - helper function to check buffer errors 4055 * @reqOutputBufferLength: max buffer length expected in command response 4056 * @rsp: query info response buffer contains output buffer length 4057 * @rsp_org: base response buffer pointer in case of chained response 4058 * @infoclass_size: query info class response buffer size 4059 * 4060 * Return: 0 on success, otherwise error 4061 */ 4062 static int buffer_check_err(int reqOutputBufferLength, 4063 struct smb2_query_info_rsp *rsp, 4064 void *rsp_org, int infoclass_size) 4065 { 4066 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4067 if (reqOutputBufferLength < infoclass_size) { 4068 pr_err("Invalid Buffer Size Requested\n"); 4069 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4070 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4071 return -EINVAL; 4072 } 4073 4074 ksmbd_debug(SMB, "Buffer Overflow\n"); 4075 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 4076 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) + 4077 reqOutputBufferLength); 4078 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength); 4079 } 4080 return 0; 4081 } 4082 4083 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4084 void *rsp_org) 4085 { 4086 struct smb2_file_standard_info *sinfo; 4087 4088 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4089 4090 sinfo->AllocationSize = cpu_to_le64(4096); 4091 sinfo->EndOfFile = cpu_to_le64(0); 4092 sinfo->NumberOfLinks = cpu_to_le32(1); 4093 sinfo->DeletePending = 1; 4094 sinfo->Directory = 0; 4095 rsp->OutputBufferLength = 4096 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4097 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info)); 4098 } 4099 4100 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4101 void *rsp_org) 4102 { 4103 struct smb2_file_internal_info *file_info; 4104 4105 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4106 4107 /* any unique number */ 4108 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4109 rsp->OutputBufferLength = 4110 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4111 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info)); 4112 } 4113 4114 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4115 struct smb2_query_info_req *req, 4116 struct smb2_query_info_rsp *rsp, 4117 void *rsp_org) 4118 { 4119 u64 id; 4120 int rc; 4121 4122 /* 4123 * Windows can sometime send query file info request on 4124 * pipe without opening it, checking error condition here 4125 */ 4126 id = req->VolatileFileId; 4127 if (!ksmbd_session_rpc_method(sess, id)) 4128 return -ENOENT; 4129 4130 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4131 req->FileInfoClass, req->VolatileFileId); 4132 4133 switch (req->FileInfoClass) { 4134 case FILE_STANDARD_INFORMATION: 4135 get_standard_info_pipe(rsp, rsp_org); 4136 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4137 rsp, rsp_org, 4138 FILE_STANDARD_INFORMATION_SIZE); 4139 break; 4140 case FILE_INTERNAL_INFORMATION: 4141 get_internal_info_pipe(rsp, id, rsp_org); 4142 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4143 rsp, rsp_org, 4144 FILE_INTERNAL_INFORMATION_SIZE); 4145 break; 4146 default: 4147 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4148 req->FileInfoClass); 4149 rc = -EOPNOTSUPP; 4150 } 4151 return rc; 4152 } 4153 4154 /** 4155 * smb2_get_ea() - handler for smb2 get extended attribute command 4156 * @work: smb work containing query info command buffer 4157 * @fp: ksmbd_file pointer 4158 * @req: get extended attribute request 4159 * @rsp: response buffer pointer 4160 * @rsp_org: base response buffer pointer in case of chained response 4161 * 4162 * Return: 0 on success, otherwise error 4163 */ 4164 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4165 struct smb2_query_info_req *req, 4166 struct smb2_query_info_rsp *rsp, void *rsp_org) 4167 { 4168 struct smb2_ea_info *eainfo, *prev_eainfo; 4169 char *name, *ptr, *xattr_list = NULL, *buf; 4170 int rc, name_len, value_len, xattr_list_len, idx; 4171 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4172 struct smb2_ea_info_req *ea_req = NULL; 4173 const struct path *path; 4174 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4175 4176 if (!(fp->daccess & FILE_READ_EA_LE)) { 4177 pr_err("Not permitted to read ext attr : 0x%x\n", 4178 fp->daccess); 4179 return -EACCES; 4180 } 4181 4182 path = &fp->filp->f_path; 4183 /* single EA entry is requested with given user.* name */ 4184 if (req->InputBufferLength) { 4185 if (le32_to_cpu(req->InputBufferLength) < 4186 sizeof(struct smb2_ea_info_req)) 4187 return -EINVAL; 4188 4189 ea_req = (struct smb2_ea_info_req *)req->Buffer; 4190 } else { 4191 /* need to send all EAs, if no specific EA is requested*/ 4192 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4193 ksmbd_debug(SMB, 4194 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4195 le32_to_cpu(req->Flags)); 4196 } 4197 4198 buf_free_len = 4199 smb2_calc_max_out_buf_len(work, 8, 4200 le32_to_cpu(req->OutputBufferLength)); 4201 if (buf_free_len < 0) 4202 return -EINVAL; 4203 4204 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4205 if (rc < 0) { 4206 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4207 goto out; 4208 } else if (!rc) { /* there is no EA in the file */ 4209 ksmbd_debug(SMB, "no ea data in the file\n"); 4210 goto done; 4211 } 4212 xattr_list_len = rc; 4213 4214 ptr = (char *)rsp->Buffer; 4215 eainfo = (struct smb2_ea_info *)ptr; 4216 prev_eainfo = eainfo; 4217 idx = 0; 4218 4219 while (idx < xattr_list_len) { 4220 name = xattr_list + idx; 4221 name_len = strlen(name); 4222 4223 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4224 idx += name_len + 1; 4225 4226 /* 4227 * CIFS does not support EA other than user.* namespace, 4228 * still keep the framework generic, to list other attrs 4229 * in future. 4230 */ 4231 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4232 continue; 4233 4234 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4235 STREAM_PREFIX_LEN)) 4236 continue; 4237 4238 if (req->InputBufferLength && 4239 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4240 ea_req->EaNameLength)) 4241 continue; 4242 4243 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4244 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4245 continue; 4246 4247 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4248 name_len -= XATTR_USER_PREFIX_LEN; 4249 4250 ptr = (char *)(&eainfo->name + name_len + 1); 4251 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4252 name_len + 1); 4253 /* bailout if xattr can't fit in buf_free_len */ 4254 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4255 name, &buf); 4256 if (value_len <= 0) { 4257 rc = -ENOENT; 4258 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4259 goto out; 4260 } 4261 4262 buf_free_len -= value_len; 4263 if (buf_free_len < 0) { 4264 kfree(buf); 4265 break; 4266 } 4267 4268 memcpy(ptr, buf, value_len); 4269 kfree(buf); 4270 4271 ptr += value_len; 4272 eainfo->Flags = 0; 4273 eainfo->EaNameLength = name_len; 4274 4275 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4276 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4277 name_len); 4278 else 4279 memcpy(eainfo->name, name, name_len); 4280 4281 eainfo->name[name_len] = '\0'; 4282 eainfo->EaValueLength = cpu_to_le16(value_len); 4283 next_offset = offsetof(struct smb2_ea_info, name) + 4284 name_len + 1 + value_len; 4285 4286 /* align next xattr entry at 4 byte bundary */ 4287 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4288 if (alignment_bytes) { 4289 memset(ptr, '\0', alignment_bytes); 4290 ptr += alignment_bytes; 4291 next_offset += alignment_bytes; 4292 buf_free_len -= alignment_bytes; 4293 } 4294 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4295 prev_eainfo = eainfo; 4296 eainfo = (struct smb2_ea_info *)ptr; 4297 rsp_data_cnt += next_offset; 4298 4299 if (req->InputBufferLength) { 4300 ksmbd_debug(SMB, "single entry requested\n"); 4301 break; 4302 } 4303 } 4304 4305 /* no more ea entries */ 4306 prev_eainfo->NextEntryOffset = 0; 4307 done: 4308 rc = 0; 4309 if (rsp_data_cnt == 0) 4310 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4311 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4312 inc_rfc1001_len(rsp_org, rsp_data_cnt); 4313 out: 4314 kvfree(xattr_list); 4315 return rc; 4316 } 4317 4318 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4319 struct ksmbd_file *fp, void *rsp_org) 4320 { 4321 struct smb2_file_access_info *file_info; 4322 4323 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4324 file_info->AccessFlags = fp->daccess; 4325 rsp->OutputBufferLength = 4326 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4327 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info)); 4328 } 4329 4330 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4331 struct ksmbd_file *fp, void *rsp_org) 4332 { 4333 struct smb2_file_basic_info *basic_info; 4334 struct kstat stat; 4335 u64 time; 4336 4337 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4338 pr_err("no right to read the attributes : 0x%x\n", 4339 fp->daccess); 4340 return -EACCES; 4341 } 4342 4343 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4344 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4345 &stat); 4346 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4347 time = ksmbd_UnixTimeToNT(stat.atime); 4348 basic_info->LastAccessTime = cpu_to_le64(time); 4349 time = ksmbd_UnixTimeToNT(stat.mtime); 4350 basic_info->LastWriteTime = cpu_to_le64(time); 4351 time = ksmbd_UnixTimeToNT(stat.ctime); 4352 basic_info->ChangeTime = cpu_to_le64(time); 4353 basic_info->Attributes = fp->f_ci->m_fattr; 4354 basic_info->Pad1 = 0; 4355 rsp->OutputBufferLength = 4356 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4357 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info)); 4358 return 0; 4359 } 4360 4361 static unsigned long long get_allocation_size(struct inode *inode, 4362 struct kstat *stat) 4363 { 4364 unsigned long long alloc_size = 0; 4365 4366 if (!S_ISDIR(stat->mode)) { 4367 if ((inode->i_blocks << 9) <= stat->size) 4368 alloc_size = stat->size; 4369 else 4370 alloc_size = inode->i_blocks << 9; 4371 } 4372 4373 return alloc_size; 4374 } 4375 4376 static void get_file_standard_info(struct smb2_query_info_rsp *rsp, 4377 struct ksmbd_file *fp, void *rsp_org) 4378 { 4379 struct smb2_file_standard_info *sinfo; 4380 unsigned int delete_pending; 4381 struct inode *inode; 4382 struct kstat stat; 4383 4384 inode = file_inode(fp->filp); 4385 generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); 4386 4387 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4388 delete_pending = ksmbd_inode_pending_delete(fp); 4389 4390 sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat)); 4391 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4392 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4393 sinfo->DeletePending = delete_pending; 4394 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4395 rsp->OutputBufferLength = 4396 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4397 inc_rfc1001_len(rsp_org, 4398 sizeof(struct smb2_file_standard_info)); 4399 } 4400 4401 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4402 void *rsp_org) 4403 { 4404 struct smb2_file_alignment_info *file_info; 4405 4406 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4407 file_info->AlignmentRequirement = 0; 4408 rsp->OutputBufferLength = 4409 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4410 inc_rfc1001_len(rsp_org, 4411 sizeof(struct smb2_file_alignment_info)); 4412 } 4413 4414 static int get_file_all_info(struct ksmbd_work *work, 4415 struct smb2_query_info_rsp *rsp, 4416 struct ksmbd_file *fp, 4417 void *rsp_org) 4418 { 4419 struct ksmbd_conn *conn = work->conn; 4420 struct smb2_file_all_info *file_info; 4421 unsigned int delete_pending; 4422 struct inode *inode; 4423 struct kstat stat; 4424 int conv_len; 4425 char *filename; 4426 u64 time; 4427 4428 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4429 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4430 fp->daccess); 4431 return -EACCES; 4432 } 4433 4434 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4435 if (IS_ERR(filename)) 4436 return PTR_ERR(filename); 4437 4438 inode = file_inode(fp->filp); 4439 generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); 4440 4441 ksmbd_debug(SMB, "filename = %s\n", filename); 4442 delete_pending = ksmbd_inode_pending_delete(fp); 4443 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4444 4445 file_info->CreationTime = cpu_to_le64(fp->create_time); 4446 time = ksmbd_UnixTimeToNT(stat.atime); 4447 file_info->LastAccessTime = cpu_to_le64(time); 4448 time = ksmbd_UnixTimeToNT(stat.mtime); 4449 file_info->LastWriteTime = cpu_to_le64(time); 4450 time = ksmbd_UnixTimeToNT(stat.ctime); 4451 file_info->ChangeTime = cpu_to_le64(time); 4452 file_info->Attributes = fp->f_ci->m_fattr; 4453 file_info->Pad1 = 0; 4454 file_info->AllocationSize = 4455 cpu_to_le64(get_allocation_size(inode, &stat)); 4456 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4457 file_info->NumberOfLinks = 4458 cpu_to_le32(get_nlink(&stat) - delete_pending); 4459 file_info->DeletePending = delete_pending; 4460 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4461 file_info->Pad2 = 0; 4462 file_info->IndexNumber = cpu_to_le64(stat.ino); 4463 file_info->EASize = 0; 4464 file_info->AccessFlags = fp->daccess; 4465 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4466 file_info->Mode = fp->coption; 4467 file_info->AlignmentRequirement = 0; 4468 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4469 PATH_MAX, conn->local_nls, 0); 4470 conv_len *= 2; 4471 file_info->FileNameLength = cpu_to_le32(conv_len); 4472 rsp->OutputBufferLength = 4473 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4474 kfree(filename); 4475 inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength)); 4476 return 0; 4477 } 4478 4479 static void get_file_alternate_info(struct ksmbd_work *work, 4480 struct smb2_query_info_rsp *rsp, 4481 struct ksmbd_file *fp, 4482 void *rsp_org) 4483 { 4484 struct ksmbd_conn *conn = work->conn; 4485 struct smb2_file_alt_name_info *file_info; 4486 struct dentry *dentry = fp->filp->f_path.dentry; 4487 int conv_len; 4488 4489 spin_lock(&dentry->d_lock); 4490 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 4491 conv_len = ksmbd_extract_shortname(conn, 4492 dentry->d_name.name, 4493 file_info->FileName); 4494 spin_unlock(&dentry->d_lock); 4495 file_info->FileNameLength = cpu_to_le32(conv_len); 4496 rsp->OutputBufferLength = 4497 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); 4498 inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength)); 4499 } 4500 4501 static void get_file_stream_info(struct ksmbd_work *work, 4502 struct smb2_query_info_rsp *rsp, 4503 struct ksmbd_file *fp, 4504 void *rsp_org) 4505 { 4506 struct ksmbd_conn *conn = work->conn; 4507 struct smb2_file_stream_info *file_info; 4508 char *stream_name, *xattr_list = NULL, *stream_buf; 4509 struct kstat stat; 4510 const struct path *path = &fp->filp->f_path; 4511 ssize_t xattr_list_len; 4512 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 4513 int buf_free_len; 4514 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4515 4516 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4517 &stat); 4518 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 4519 4520 buf_free_len = 4521 smb2_calc_max_out_buf_len(work, 8, 4522 le32_to_cpu(req->OutputBufferLength)); 4523 if (buf_free_len < 0) 4524 goto out; 4525 4526 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4527 if (xattr_list_len < 0) { 4528 goto out; 4529 } else if (!xattr_list_len) { 4530 ksmbd_debug(SMB, "empty xattr in the file\n"); 4531 goto out; 4532 } 4533 4534 while (idx < xattr_list_len) { 4535 stream_name = xattr_list + idx; 4536 streamlen = strlen(stream_name); 4537 idx += streamlen + 1; 4538 4539 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 4540 4541 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 4542 STREAM_PREFIX, STREAM_PREFIX_LEN)) 4543 continue; 4544 4545 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 4546 STREAM_PREFIX_LEN); 4547 streamlen = stream_name_len; 4548 4549 /* plus : size */ 4550 streamlen += 1; 4551 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); 4552 if (!stream_buf) 4553 break; 4554 4555 streamlen = snprintf(stream_buf, streamlen + 1, 4556 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 4557 4558 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 4559 if (next > buf_free_len) { 4560 kfree(stream_buf); 4561 break; 4562 } 4563 4564 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 4565 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4566 stream_buf, streamlen, 4567 conn->local_nls, 0); 4568 streamlen *= 2; 4569 kfree(stream_buf); 4570 file_info->StreamNameLength = cpu_to_le32(streamlen); 4571 file_info->StreamSize = cpu_to_le64(stream_name_len); 4572 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 4573 4574 nbytes += next; 4575 buf_free_len -= next; 4576 file_info->NextEntryOffset = cpu_to_le32(next); 4577 } 4578 4579 out: 4580 if (!S_ISDIR(stat.mode) && 4581 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 4582 file_info = (struct smb2_file_stream_info *) 4583 &rsp->Buffer[nbytes]; 4584 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4585 "::$DATA", 7, conn->local_nls, 0); 4586 streamlen *= 2; 4587 file_info->StreamNameLength = cpu_to_le32(streamlen); 4588 file_info->StreamSize = cpu_to_le64(stat.size); 4589 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 4590 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 4591 } 4592 4593 /* last entry offset should be 0 */ 4594 file_info->NextEntryOffset = 0; 4595 kvfree(xattr_list); 4596 4597 rsp->OutputBufferLength = cpu_to_le32(nbytes); 4598 inc_rfc1001_len(rsp_org, nbytes); 4599 } 4600 4601 static void get_file_internal_info(struct smb2_query_info_rsp *rsp, 4602 struct ksmbd_file *fp, void *rsp_org) 4603 { 4604 struct smb2_file_internal_info *file_info; 4605 struct kstat stat; 4606 4607 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4608 &stat); 4609 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4610 file_info->IndexNumber = cpu_to_le64(stat.ino); 4611 rsp->OutputBufferLength = 4612 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4613 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info)); 4614 } 4615 4616 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 4617 struct ksmbd_file *fp, void *rsp_org) 4618 { 4619 struct smb2_file_ntwrk_info *file_info; 4620 struct inode *inode; 4621 struct kstat stat; 4622 u64 time; 4623 4624 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4625 pr_err("no right to read the attributes : 0x%x\n", 4626 fp->daccess); 4627 return -EACCES; 4628 } 4629 4630 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; 4631 4632 inode = file_inode(fp->filp); 4633 generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); 4634 4635 file_info->CreationTime = cpu_to_le64(fp->create_time); 4636 time = ksmbd_UnixTimeToNT(stat.atime); 4637 file_info->LastAccessTime = cpu_to_le64(time); 4638 time = ksmbd_UnixTimeToNT(stat.mtime); 4639 file_info->LastWriteTime = cpu_to_le64(time); 4640 time = ksmbd_UnixTimeToNT(stat.ctime); 4641 file_info->ChangeTime = cpu_to_le64(time); 4642 file_info->Attributes = fp->f_ci->m_fattr; 4643 file_info->AllocationSize = 4644 cpu_to_le64(get_allocation_size(inode, &stat)); 4645 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4646 file_info->Reserved = cpu_to_le32(0); 4647 rsp->OutputBufferLength = 4648 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); 4649 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info)); 4650 return 0; 4651 } 4652 4653 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 4654 { 4655 struct smb2_file_ea_info *file_info; 4656 4657 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 4658 file_info->EASize = 0; 4659 rsp->OutputBufferLength = 4660 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 4661 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info)); 4662 } 4663 4664 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 4665 struct ksmbd_file *fp, void *rsp_org) 4666 { 4667 struct smb2_file_pos_info *file_info; 4668 4669 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 4670 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4671 rsp->OutputBufferLength = 4672 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 4673 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info)); 4674 } 4675 4676 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 4677 struct ksmbd_file *fp, void *rsp_org) 4678 { 4679 struct smb2_file_mode_info *file_info; 4680 4681 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 4682 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 4683 rsp->OutputBufferLength = 4684 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 4685 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info)); 4686 } 4687 4688 static void get_file_compression_info(struct smb2_query_info_rsp *rsp, 4689 struct ksmbd_file *fp, void *rsp_org) 4690 { 4691 struct smb2_file_comp_info *file_info; 4692 struct kstat stat; 4693 4694 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4695 &stat); 4696 4697 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 4698 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 4699 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 4700 file_info->CompressionUnitShift = 0; 4701 file_info->ChunkShift = 0; 4702 file_info->ClusterShift = 0; 4703 memset(&file_info->Reserved[0], 0, 3); 4704 4705 rsp->OutputBufferLength = 4706 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 4707 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info)); 4708 } 4709 4710 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 4711 struct ksmbd_file *fp, void *rsp_org) 4712 { 4713 struct smb2_file_attr_tag_info *file_info; 4714 4715 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4716 pr_err("no right to read the attributes : 0x%x\n", 4717 fp->daccess); 4718 return -EACCES; 4719 } 4720 4721 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 4722 file_info->FileAttributes = fp->f_ci->m_fattr; 4723 file_info->ReparseTag = 0; 4724 rsp->OutputBufferLength = 4725 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 4726 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info)); 4727 return 0; 4728 } 4729 4730 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 4731 struct ksmbd_file *fp, void *rsp_org) 4732 { 4733 struct smb311_posix_qinfo *file_info; 4734 struct inode *inode = file_inode(fp->filp); 4735 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4736 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 4737 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 4738 u64 time; 4739 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 4740 4741 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 4742 file_info->CreationTime = cpu_to_le64(fp->create_time); 4743 time = ksmbd_UnixTimeToNT(inode->i_atime); 4744 file_info->LastAccessTime = cpu_to_le64(time); 4745 time = ksmbd_UnixTimeToNT(inode->i_mtime); 4746 file_info->LastWriteTime = cpu_to_le64(time); 4747 time = ksmbd_UnixTimeToNT(inode->i_ctime); 4748 file_info->ChangeTime = cpu_to_le64(time); 4749 file_info->DosAttributes = fp->f_ci->m_fattr; 4750 file_info->Inode = cpu_to_le64(inode->i_ino); 4751 file_info->EndOfFile = cpu_to_le64(inode->i_size); 4752 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4753 file_info->HardLinks = cpu_to_le32(inode->i_nlink); 4754 file_info->Mode = cpu_to_le32(inode->i_mode & 0777); 4755 file_info->DeviceId = cpu_to_le32(inode->i_rdev); 4756 4757 /* 4758 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4759 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4760 * sub_auth(4 * 1(num_subauth)) + RID(4). 4761 */ 4762 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 4763 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 4764 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 4765 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 4766 4767 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 4768 inc_rfc1001_len(rsp_org, out_buf_len); 4769 return out_buf_len; 4770 } 4771 4772 static int smb2_get_info_file(struct ksmbd_work *work, 4773 struct smb2_query_info_req *req, 4774 struct smb2_query_info_rsp *rsp) 4775 { 4776 struct ksmbd_file *fp; 4777 int fileinfoclass = 0; 4778 int rc = 0; 4779 int file_infoclass_size; 4780 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 4781 4782 if (test_share_config_flag(work->tcon->share_conf, 4783 KSMBD_SHARE_FLAG_PIPE)) { 4784 /* smb2 info file called for pipe */ 4785 return smb2_get_info_file_pipe(work->sess, req, rsp, 4786 work->response_buf); 4787 } 4788 4789 if (work->next_smb2_rcv_hdr_off) { 4790 if (!has_file_id(req->VolatileFileId)) { 4791 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 4792 work->compound_fid); 4793 id = work->compound_fid; 4794 pid = work->compound_pfid; 4795 } 4796 } 4797 4798 if (!has_file_id(id)) { 4799 id = req->VolatileFileId; 4800 pid = req->PersistentFileId; 4801 } 4802 4803 fp = ksmbd_lookup_fd_slow(work, id, pid); 4804 if (!fp) 4805 return -ENOENT; 4806 4807 fileinfoclass = req->FileInfoClass; 4808 4809 switch (fileinfoclass) { 4810 case FILE_ACCESS_INFORMATION: 4811 get_file_access_info(rsp, fp, work->response_buf); 4812 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE; 4813 break; 4814 4815 case FILE_BASIC_INFORMATION: 4816 rc = get_file_basic_info(rsp, fp, work->response_buf); 4817 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE; 4818 break; 4819 4820 case FILE_STANDARD_INFORMATION: 4821 get_file_standard_info(rsp, fp, work->response_buf); 4822 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE; 4823 break; 4824 4825 case FILE_ALIGNMENT_INFORMATION: 4826 get_file_alignment_info(rsp, work->response_buf); 4827 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE; 4828 break; 4829 4830 case FILE_ALL_INFORMATION: 4831 rc = get_file_all_info(work, rsp, fp, work->response_buf); 4832 file_infoclass_size = FILE_ALL_INFORMATION_SIZE; 4833 break; 4834 4835 case FILE_ALTERNATE_NAME_INFORMATION: 4836 get_file_alternate_info(work, rsp, fp, work->response_buf); 4837 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE; 4838 break; 4839 4840 case FILE_STREAM_INFORMATION: 4841 get_file_stream_info(work, rsp, fp, work->response_buf); 4842 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE; 4843 break; 4844 4845 case FILE_INTERNAL_INFORMATION: 4846 get_file_internal_info(rsp, fp, work->response_buf); 4847 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE; 4848 break; 4849 4850 case FILE_NETWORK_OPEN_INFORMATION: 4851 rc = get_file_network_open_info(rsp, fp, work->response_buf); 4852 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE; 4853 break; 4854 4855 case FILE_EA_INFORMATION: 4856 get_file_ea_info(rsp, work->response_buf); 4857 file_infoclass_size = FILE_EA_INFORMATION_SIZE; 4858 break; 4859 4860 case FILE_FULL_EA_INFORMATION: 4861 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 4862 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE; 4863 break; 4864 4865 case FILE_POSITION_INFORMATION: 4866 get_file_position_info(rsp, fp, work->response_buf); 4867 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE; 4868 break; 4869 4870 case FILE_MODE_INFORMATION: 4871 get_file_mode_info(rsp, fp, work->response_buf); 4872 file_infoclass_size = FILE_MODE_INFORMATION_SIZE; 4873 break; 4874 4875 case FILE_COMPRESSION_INFORMATION: 4876 get_file_compression_info(rsp, fp, work->response_buf); 4877 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE; 4878 break; 4879 4880 case FILE_ATTRIBUTE_TAG_INFORMATION: 4881 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 4882 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE; 4883 break; 4884 case SMB_FIND_FILE_POSIX_INFO: 4885 if (!work->tcon->posix_extensions) { 4886 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 4887 rc = -EOPNOTSUPP; 4888 } else { 4889 file_infoclass_size = find_file_posix_info(rsp, fp, 4890 work->response_buf); 4891 } 4892 break; 4893 default: 4894 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 4895 fileinfoclass); 4896 rc = -EOPNOTSUPP; 4897 } 4898 if (!rc) 4899 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4900 rsp, work->response_buf, 4901 file_infoclass_size); 4902 ksmbd_fd_put(work, fp); 4903 return rc; 4904 } 4905 4906 static int smb2_get_info_filesystem(struct ksmbd_work *work, 4907 struct smb2_query_info_req *req, 4908 struct smb2_query_info_rsp *rsp) 4909 { 4910 struct ksmbd_session *sess = work->sess; 4911 struct ksmbd_conn *conn = work->conn; 4912 struct ksmbd_share_config *share = work->tcon->share_conf; 4913 int fsinfoclass = 0; 4914 struct kstatfs stfs; 4915 struct path path; 4916 int rc = 0, len; 4917 int fs_infoclass_size = 0; 4918 4919 if (!share->path) 4920 return -EIO; 4921 4922 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 4923 if (rc) { 4924 pr_err("cannot create vfs path\n"); 4925 return -EIO; 4926 } 4927 4928 rc = vfs_statfs(&path, &stfs); 4929 if (rc) { 4930 pr_err("cannot do stat of path %s\n", share->path); 4931 path_put(&path); 4932 return -EIO; 4933 } 4934 4935 fsinfoclass = req->FileInfoClass; 4936 4937 switch (fsinfoclass) { 4938 case FS_DEVICE_INFORMATION: 4939 { 4940 struct filesystem_device_info *info; 4941 4942 info = (struct filesystem_device_info *)rsp->Buffer; 4943 4944 info->DeviceType = cpu_to_le32(stfs.f_type); 4945 info->DeviceCharacteristics = cpu_to_le32(0x00000020); 4946 rsp->OutputBufferLength = cpu_to_le32(8); 4947 inc_rfc1001_len(work->response_buf, 8); 4948 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE; 4949 break; 4950 } 4951 case FS_ATTRIBUTE_INFORMATION: 4952 { 4953 struct filesystem_attribute_info *info; 4954 size_t sz; 4955 4956 info = (struct filesystem_attribute_info *)rsp->Buffer; 4957 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 4958 FILE_PERSISTENT_ACLS | 4959 FILE_UNICODE_ON_DISK | 4960 FILE_CASE_PRESERVED_NAMES | 4961 FILE_CASE_SENSITIVE_SEARCH | 4962 FILE_SUPPORTS_BLOCK_REFCOUNTING); 4963 4964 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 4965 4966 if (test_share_config_flag(work->tcon->share_conf, 4967 KSMBD_SHARE_FLAG_STREAMS)) 4968 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 4969 4970 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 4971 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 4972 "NTFS", PATH_MAX, conn->local_nls, 0); 4973 len = len * 2; 4974 info->FileSystemNameLen = cpu_to_le32(len); 4975 sz = sizeof(struct filesystem_attribute_info) - 2 + len; 4976 rsp->OutputBufferLength = cpu_to_le32(sz); 4977 inc_rfc1001_len(work->response_buf, sz); 4978 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE; 4979 break; 4980 } 4981 case FS_VOLUME_INFORMATION: 4982 { 4983 struct filesystem_vol_info *info; 4984 size_t sz; 4985 unsigned int serial_crc = 0; 4986 4987 info = (struct filesystem_vol_info *)(rsp->Buffer); 4988 info->VolumeCreationTime = 0; 4989 serial_crc = crc32_le(serial_crc, share->name, 4990 strlen(share->name)); 4991 serial_crc = crc32_le(serial_crc, share->path, 4992 strlen(share->path)); 4993 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 4994 strlen(ksmbd_netbios_name())); 4995 /* Taking dummy value of serial number*/ 4996 info->SerialNumber = cpu_to_le32(serial_crc); 4997 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 4998 share->name, PATH_MAX, 4999 conn->local_nls, 0); 5000 len = len * 2; 5001 info->VolumeLabelSize = cpu_to_le32(len); 5002 info->Reserved = 0; 5003 sz = sizeof(struct filesystem_vol_info) - 2 + len; 5004 rsp->OutputBufferLength = cpu_to_le32(sz); 5005 inc_rfc1001_len(work->response_buf, sz); 5006 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE; 5007 break; 5008 } 5009 case FS_SIZE_INFORMATION: 5010 { 5011 struct filesystem_info *info; 5012 5013 info = (struct filesystem_info *)(rsp->Buffer); 5014 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5015 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); 5016 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5017 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5018 rsp->OutputBufferLength = cpu_to_le32(24); 5019 inc_rfc1001_len(work->response_buf, 24); 5020 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE; 5021 break; 5022 } 5023 case FS_FULL_SIZE_INFORMATION: 5024 { 5025 struct smb2_fs_full_size_info *info; 5026 5027 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5028 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5029 info->CallerAvailableAllocationUnits = 5030 cpu_to_le64(stfs.f_bavail); 5031 info->ActualAvailableAllocationUnits = 5032 cpu_to_le64(stfs.f_bfree); 5033 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5034 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5035 rsp->OutputBufferLength = cpu_to_le32(32); 5036 inc_rfc1001_len(work->response_buf, 32); 5037 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE; 5038 break; 5039 } 5040 case FS_OBJECT_ID_INFORMATION: 5041 { 5042 struct object_id_info *info; 5043 5044 info = (struct object_id_info *)(rsp->Buffer); 5045 5046 if (!user_guest(sess->user)) 5047 memcpy(info->objid, user_passkey(sess->user), 16); 5048 else 5049 memset(info->objid, 0, 16); 5050 5051 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5052 info->extended_info.version = cpu_to_le32(1); 5053 info->extended_info.release = cpu_to_le32(1); 5054 info->extended_info.rel_date = 0; 5055 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5056 rsp->OutputBufferLength = cpu_to_le32(64); 5057 inc_rfc1001_len(work->response_buf, 64); 5058 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE; 5059 break; 5060 } 5061 case FS_SECTOR_SIZE_INFORMATION: 5062 { 5063 struct smb3_fs_ss_info *info; 5064 unsigned int sector_size = 5065 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5066 5067 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5068 5069 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5070 info->PhysicalBytesPerSectorForAtomicity = 5071 cpu_to_le32(sector_size); 5072 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5073 info->FSEffPhysicalBytesPerSectorForAtomicity = 5074 cpu_to_le32(sector_size); 5075 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5076 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5077 info->ByteOffsetForSectorAlignment = 0; 5078 info->ByteOffsetForPartitionAlignment = 0; 5079 rsp->OutputBufferLength = cpu_to_le32(28); 5080 inc_rfc1001_len(work->response_buf, 28); 5081 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE; 5082 break; 5083 } 5084 case FS_CONTROL_INFORMATION: 5085 { 5086 /* 5087 * TODO : The current implementation is based on 5088 * test result with win7(NTFS) server. It's need to 5089 * modify this to get valid Quota values 5090 * from Linux kernel 5091 */ 5092 struct smb2_fs_control_info *info; 5093 5094 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5095 info->FreeSpaceStartFiltering = 0; 5096 info->FreeSpaceThreshold = 0; 5097 info->FreeSpaceStopFiltering = 0; 5098 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5099 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5100 info->Padding = 0; 5101 rsp->OutputBufferLength = cpu_to_le32(48); 5102 inc_rfc1001_len(work->response_buf, 48); 5103 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE; 5104 break; 5105 } 5106 case FS_POSIX_INFORMATION: 5107 { 5108 struct filesystem_posix_info *info; 5109 5110 if (!work->tcon->posix_extensions) { 5111 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5112 rc = -EOPNOTSUPP; 5113 } else { 5114 info = (struct filesystem_posix_info *)(rsp->Buffer); 5115 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5116 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5117 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5118 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5119 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5120 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5121 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5122 rsp->OutputBufferLength = cpu_to_le32(56); 5123 inc_rfc1001_len(work->response_buf, 56); 5124 fs_infoclass_size = FS_POSIX_INFORMATION_SIZE; 5125 } 5126 break; 5127 } 5128 default: 5129 path_put(&path); 5130 return -EOPNOTSUPP; 5131 } 5132 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5133 rsp, work->response_buf, 5134 fs_infoclass_size); 5135 path_put(&path); 5136 return rc; 5137 } 5138 5139 static int smb2_get_info_sec(struct ksmbd_work *work, 5140 struct smb2_query_info_req *req, 5141 struct smb2_query_info_rsp *rsp) 5142 { 5143 struct ksmbd_file *fp; 5144 struct mnt_idmap *idmap; 5145 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5146 struct smb_fattr fattr = {{0}}; 5147 struct inode *inode; 5148 __u32 secdesclen = 0; 5149 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5150 int addition_info = le32_to_cpu(req->AdditionalInformation); 5151 int rc = 0, ppntsd_size = 0; 5152 5153 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5154 PROTECTED_DACL_SECINFO | 5155 UNPROTECTED_DACL_SECINFO)) { 5156 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5157 addition_info); 5158 5159 pntsd->revision = cpu_to_le16(1); 5160 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5161 pntsd->osidoffset = 0; 5162 pntsd->gsidoffset = 0; 5163 pntsd->sacloffset = 0; 5164 pntsd->dacloffset = 0; 5165 5166 secdesclen = sizeof(struct smb_ntsd); 5167 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5168 inc_rfc1001_len(work->response_buf, secdesclen); 5169 5170 return 0; 5171 } 5172 5173 if (work->next_smb2_rcv_hdr_off) { 5174 if (!has_file_id(req->VolatileFileId)) { 5175 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5176 work->compound_fid); 5177 id = work->compound_fid; 5178 pid = work->compound_pfid; 5179 } 5180 } 5181 5182 if (!has_file_id(id)) { 5183 id = req->VolatileFileId; 5184 pid = req->PersistentFileId; 5185 } 5186 5187 fp = ksmbd_lookup_fd_slow(work, id, pid); 5188 if (!fp) 5189 return -ENOENT; 5190 5191 idmap = file_mnt_idmap(fp->filp); 5192 inode = file_inode(fp->filp); 5193 ksmbd_acls_fattr(&fattr, idmap, inode); 5194 5195 if (test_share_config_flag(work->tcon->share_conf, 5196 KSMBD_SHARE_FLAG_ACL_XATTR)) 5197 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5198 fp->filp->f_path.dentry, 5199 &ppntsd); 5200 5201 /* Check if sd buffer size exceeds response buffer size */ 5202 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5203 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5204 addition_info, &secdesclen, &fattr); 5205 posix_acl_release(fattr.cf_acls); 5206 posix_acl_release(fattr.cf_dacls); 5207 kfree(ppntsd); 5208 ksmbd_fd_put(work, fp); 5209 if (rc) 5210 return rc; 5211 5212 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5213 inc_rfc1001_len(work->response_buf, secdesclen); 5214 return 0; 5215 } 5216 5217 /** 5218 * smb2_query_info() - handler for smb2 query info command 5219 * @work: smb work containing query info request buffer 5220 * 5221 * Return: 0 on success, otherwise error 5222 */ 5223 int smb2_query_info(struct ksmbd_work *work) 5224 { 5225 struct smb2_query_info_req *req; 5226 struct smb2_query_info_rsp *rsp; 5227 int rc = 0; 5228 5229 WORK_BUFFERS(work, req, rsp); 5230 5231 ksmbd_debug(SMB, "GOT query info request\n"); 5232 5233 switch (req->InfoType) { 5234 case SMB2_O_INFO_FILE: 5235 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5236 rc = smb2_get_info_file(work, req, rsp); 5237 break; 5238 case SMB2_O_INFO_FILESYSTEM: 5239 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5240 rc = smb2_get_info_filesystem(work, req, rsp); 5241 break; 5242 case SMB2_O_INFO_SECURITY: 5243 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5244 rc = smb2_get_info_sec(work, req, rsp); 5245 break; 5246 default: 5247 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5248 req->InfoType); 5249 rc = -EOPNOTSUPP; 5250 } 5251 5252 if (rc < 0) { 5253 if (rc == -EACCES) 5254 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5255 else if (rc == -ENOENT) 5256 rsp->hdr.Status = STATUS_FILE_CLOSED; 5257 else if (rc == -EIO) 5258 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5259 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5260 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5261 smb2_set_err_rsp(work); 5262 5263 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5264 rc); 5265 return rc; 5266 } 5267 rsp->StructureSize = cpu_to_le16(9); 5268 rsp->OutputBufferOffset = cpu_to_le16(72); 5269 inc_rfc1001_len(work->response_buf, 8); 5270 return 0; 5271 } 5272 5273 /** 5274 * smb2_close_pipe() - handler for closing IPC pipe 5275 * @work: smb work containing close request buffer 5276 * 5277 * Return: 0 5278 */ 5279 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5280 { 5281 u64 id; 5282 struct smb2_close_req *req = smb2_get_msg(work->request_buf); 5283 struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf); 5284 5285 id = req->VolatileFileId; 5286 ksmbd_session_rpc_close(work->sess, id); 5287 5288 rsp->StructureSize = cpu_to_le16(60); 5289 rsp->Flags = 0; 5290 rsp->Reserved = 0; 5291 rsp->CreationTime = 0; 5292 rsp->LastAccessTime = 0; 5293 rsp->LastWriteTime = 0; 5294 rsp->ChangeTime = 0; 5295 rsp->AllocationSize = 0; 5296 rsp->EndOfFile = 0; 5297 rsp->Attributes = 0; 5298 inc_rfc1001_len(work->response_buf, 60); 5299 return 0; 5300 } 5301 5302 /** 5303 * smb2_close() - handler for smb2 close file command 5304 * @work: smb work containing close request buffer 5305 * 5306 * Return: 0 5307 */ 5308 int smb2_close(struct ksmbd_work *work) 5309 { 5310 u64 volatile_id = KSMBD_NO_FID; 5311 u64 sess_id; 5312 struct smb2_close_req *req; 5313 struct smb2_close_rsp *rsp; 5314 struct ksmbd_conn *conn = work->conn; 5315 struct ksmbd_file *fp; 5316 struct inode *inode; 5317 u64 time; 5318 int err = 0; 5319 5320 WORK_BUFFERS(work, req, rsp); 5321 5322 if (test_share_config_flag(work->tcon->share_conf, 5323 KSMBD_SHARE_FLAG_PIPE)) { 5324 ksmbd_debug(SMB, "IPC pipe close request\n"); 5325 return smb2_close_pipe(work); 5326 } 5327 5328 sess_id = le64_to_cpu(req->hdr.SessionId); 5329 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5330 sess_id = work->compound_sid; 5331 5332 work->compound_sid = 0; 5333 if (check_session_id(conn, sess_id)) { 5334 work->compound_sid = sess_id; 5335 } else { 5336 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5337 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5338 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5339 err = -EBADF; 5340 goto out; 5341 } 5342 5343 if (work->next_smb2_rcv_hdr_off && 5344 !has_file_id(req->VolatileFileId)) { 5345 if (!has_file_id(work->compound_fid)) { 5346 /* file already closed, return FILE_CLOSED */ 5347 ksmbd_debug(SMB, "file already closed\n"); 5348 rsp->hdr.Status = STATUS_FILE_CLOSED; 5349 err = -EBADF; 5350 goto out; 5351 } else { 5352 ksmbd_debug(SMB, 5353 "Compound request set FID = %llu:%llu\n", 5354 work->compound_fid, 5355 work->compound_pfid); 5356 volatile_id = work->compound_fid; 5357 5358 /* file closed, stored id is not valid anymore */ 5359 work->compound_fid = KSMBD_NO_FID; 5360 work->compound_pfid = KSMBD_NO_FID; 5361 } 5362 } else { 5363 volatile_id = req->VolatileFileId; 5364 } 5365 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5366 5367 rsp->StructureSize = cpu_to_le16(60); 5368 rsp->Reserved = 0; 5369 5370 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5371 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5372 if (!fp) { 5373 err = -ENOENT; 5374 goto out; 5375 } 5376 5377 inode = file_inode(fp->filp); 5378 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5379 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 : 5380 cpu_to_le64(inode->i_blocks << 9); 5381 rsp->EndOfFile = cpu_to_le64(inode->i_size); 5382 rsp->Attributes = fp->f_ci->m_fattr; 5383 rsp->CreationTime = cpu_to_le64(fp->create_time); 5384 time = ksmbd_UnixTimeToNT(inode->i_atime); 5385 rsp->LastAccessTime = cpu_to_le64(time); 5386 time = ksmbd_UnixTimeToNT(inode->i_mtime); 5387 rsp->LastWriteTime = cpu_to_le64(time); 5388 time = ksmbd_UnixTimeToNT(inode->i_ctime); 5389 rsp->ChangeTime = cpu_to_le64(time); 5390 ksmbd_fd_put(work, fp); 5391 } else { 5392 rsp->Flags = 0; 5393 rsp->AllocationSize = 0; 5394 rsp->EndOfFile = 0; 5395 rsp->Attributes = 0; 5396 rsp->CreationTime = 0; 5397 rsp->LastAccessTime = 0; 5398 rsp->LastWriteTime = 0; 5399 rsp->ChangeTime = 0; 5400 } 5401 5402 err = ksmbd_close_fd(work, volatile_id); 5403 out: 5404 if (err) { 5405 if (rsp->hdr.Status == 0) 5406 rsp->hdr.Status = STATUS_FILE_CLOSED; 5407 smb2_set_err_rsp(work); 5408 } else { 5409 inc_rfc1001_len(work->response_buf, 60); 5410 } 5411 5412 return 0; 5413 } 5414 5415 /** 5416 * smb2_echo() - handler for smb2 echo(ping) command 5417 * @work: smb work containing echo request buffer 5418 * 5419 * Return: 0 5420 */ 5421 int smb2_echo(struct ksmbd_work *work) 5422 { 5423 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); 5424 5425 rsp->StructureSize = cpu_to_le16(4); 5426 rsp->Reserved = 0; 5427 inc_rfc1001_len(work->response_buf, 4); 5428 return 0; 5429 } 5430 5431 static int smb2_rename(struct ksmbd_work *work, 5432 struct ksmbd_file *fp, 5433 struct smb2_file_rename_info *file_info, 5434 struct nls_table *local_nls) 5435 { 5436 struct ksmbd_share_config *share = fp->tcon->share_conf; 5437 char *new_name = NULL; 5438 int rc, flags = 0; 5439 5440 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 5441 new_name = smb2_get_name(file_info->FileName, 5442 le32_to_cpu(file_info->FileNameLength), 5443 local_nls); 5444 if (IS_ERR(new_name)) 5445 return PTR_ERR(new_name); 5446 5447 if (strchr(new_name, ':')) { 5448 int s_type; 5449 char *xattr_stream_name, *stream_name = NULL; 5450 size_t xattr_stream_size; 5451 int len; 5452 5453 rc = parse_stream_name(new_name, &stream_name, &s_type); 5454 if (rc < 0) 5455 goto out; 5456 5457 len = strlen(new_name); 5458 if (len > 0 && new_name[len - 1] != '/') { 5459 pr_err("not allow base filename in rename\n"); 5460 rc = -ESHARE; 5461 goto out; 5462 } 5463 5464 rc = ksmbd_vfs_xattr_stream_name(stream_name, 5465 &xattr_stream_name, 5466 &xattr_stream_size, 5467 s_type); 5468 if (rc) 5469 goto out; 5470 5471 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 5472 fp->filp->f_path.dentry, 5473 xattr_stream_name, 5474 NULL, 0, 0); 5475 if (rc < 0) { 5476 pr_err("failed to store stream name in xattr: %d\n", 5477 rc); 5478 rc = -EINVAL; 5479 goto out; 5480 } 5481 5482 goto out; 5483 } 5484 5485 ksmbd_debug(SMB, "new name %s\n", new_name); 5486 if (ksmbd_share_veto_filename(share, new_name)) { 5487 rc = -ENOENT; 5488 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 5489 goto out; 5490 } 5491 5492 if (!file_info->ReplaceIfExists) 5493 flags = RENAME_NOREPLACE; 5494 5495 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 5496 out: 5497 kfree(new_name); 5498 return rc; 5499 } 5500 5501 static int smb2_create_link(struct ksmbd_work *work, 5502 struct ksmbd_share_config *share, 5503 struct smb2_file_link_info *file_info, 5504 unsigned int buf_len, struct file *filp, 5505 struct nls_table *local_nls) 5506 { 5507 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 5508 struct path path; 5509 bool file_present = true; 5510 int rc; 5511 5512 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 5513 le32_to_cpu(file_info->FileNameLength)) 5514 return -EINVAL; 5515 5516 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 5517 pathname = kmalloc(PATH_MAX, GFP_KERNEL); 5518 if (!pathname) 5519 return -ENOMEM; 5520 5521 link_name = smb2_get_name(file_info->FileName, 5522 le32_to_cpu(file_info->FileNameLength), 5523 local_nls); 5524 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 5525 rc = -EINVAL; 5526 goto out; 5527 } 5528 5529 ksmbd_debug(SMB, "link name is %s\n", link_name); 5530 target_name = file_path(filp, pathname, PATH_MAX); 5531 if (IS_ERR(target_name)) { 5532 rc = -EINVAL; 5533 goto out; 5534 } 5535 5536 ksmbd_debug(SMB, "target name is %s\n", target_name); 5537 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, 5538 &path, 0); 5539 if (rc) { 5540 if (rc != -ENOENT) 5541 goto out; 5542 file_present = false; 5543 } 5544 5545 if (file_info->ReplaceIfExists) { 5546 if (file_present) { 5547 rc = ksmbd_vfs_remove_file(work, &path); 5548 if (rc) { 5549 rc = -EINVAL; 5550 ksmbd_debug(SMB, "cannot delete %s\n", 5551 link_name); 5552 goto out; 5553 } 5554 } 5555 } else { 5556 if (file_present) { 5557 rc = -EEXIST; 5558 ksmbd_debug(SMB, "link already exists\n"); 5559 goto out; 5560 } 5561 } 5562 5563 rc = ksmbd_vfs_link(work, target_name, link_name); 5564 if (rc) 5565 rc = -EINVAL; 5566 out: 5567 if (file_present) { 5568 inode_unlock(d_inode(path.dentry->d_parent)); 5569 path_put(&path); 5570 } 5571 if (!IS_ERR(link_name)) 5572 kfree(link_name); 5573 kfree(pathname); 5574 return rc; 5575 } 5576 5577 static int set_file_basic_info(struct ksmbd_file *fp, 5578 struct smb2_file_basic_info *file_info, 5579 struct ksmbd_share_config *share) 5580 { 5581 struct iattr attrs; 5582 struct file *filp; 5583 struct inode *inode; 5584 struct mnt_idmap *idmap; 5585 int rc = 0; 5586 5587 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 5588 return -EACCES; 5589 5590 attrs.ia_valid = 0; 5591 filp = fp->filp; 5592 inode = file_inode(filp); 5593 idmap = file_mnt_idmap(filp); 5594 5595 if (file_info->CreationTime) 5596 fp->create_time = le64_to_cpu(file_info->CreationTime); 5597 5598 if (file_info->LastAccessTime) { 5599 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 5600 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 5601 } 5602 5603 attrs.ia_valid |= ATTR_CTIME; 5604 if (file_info->ChangeTime) 5605 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); 5606 else 5607 attrs.ia_ctime = inode->i_ctime; 5608 5609 if (file_info->LastWriteTime) { 5610 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 5611 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 5612 } 5613 5614 if (file_info->Attributes) { 5615 if (!S_ISDIR(inode->i_mode) && 5616 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 5617 pr_err("can't change a file to a directory\n"); 5618 return -EINVAL; 5619 } 5620 5621 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 5622 fp->f_ci->m_fattr = file_info->Attributes | 5623 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 5624 } 5625 5626 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 5627 (file_info->CreationTime || file_info->Attributes)) { 5628 struct xattr_dos_attrib da = {0}; 5629 5630 da.version = 4; 5631 da.itime = fp->itime; 5632 da.create_time = fp->create_time; 5633 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 5634 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 5635 XATTR_DOSINFO_ITIME; 5636 5637 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, 5638 filp->f_path.dentry, &da); 5639 if (rc) 5640 ksmbd_debug(SMB, 5641 "failed to restore file attribute in EA\n"); 5642 rc = 0; 5643 } 5644 5645 if (attrs.ia_valid) { 5646 struct dentry *dentry = filp->f_path.dentry; 5647 struct inode *inode = d_inode(dentry); 5648 5649 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 5650 return -EACCES; 5651 5652 inode_lock(inode); 5653 inode->i_ctime = attrs.ia_ctime; 5654 attrs.ia_valid &= ~ATTR_CTIME; 5655 rc = notify_change(idmap, dentry, &attrs, NULL); 5656 inode_unlock(inode); 5657 } 5658 return rc; 5659 } 5660 5661 static int set_file_allocation_info(struct ksmbd_work *work, 5662 struct ksmbd_file *fp, 5663 struct smb2_file_alloc_info *file_alloc_info) 5664 { 5665 /* 5666 * TODO : It's working fine only when store dos attributes 5667 * is not yes. need to implement a logic which works 5668 * properly with any smb.conf option 5669 */ 5670 5671 loff_t alloc_blks; 5672 struct inode *inode; 5673 int rc; 5674 5675 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5676 return -EACCES; 5677 5678 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 5679 inode = file_inode(fp->filp); 5680 5681 if (alloc_blks > inode->i_blocks) { 5682 smb_break_all_levII_oplock(work, fp, 1); 5683 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 5684 alloc_blks * 512); 5685 if (rc && rc != -EOPNOTSUPP) { 5686 pr_err("vfs_fallocate is failed : %d\n", rc); 5687 return rc; 5688 } 5689 } else if (alloc_blks < inode->i_blocks) { 5690 loff_t size; 5691 5692 /* 5693 * Allocation size could be smaller than original one 5694 * which means allocated blocks in file should be 5695 * deallocated. use truncate to cut out it, but inode 5696 * size is also updated with truncate offset. 5697 * inode size is retained by backup inode size. 5698 */ 5699 size = i_size_read(inode); 5700 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 5701 if (rc) { 5702 pr_err("truncate failed!, err %d\n", rc); 5703 return rc; 5704 } 5705 if (size < alloc_blks * 512) 5706 i_size_write(inode, size); 5707 } 5708 return 0; 5709 } 5710 5711 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5712 struct smb2_file_eof_info *file_eof_info) 5713 { 5714 loff_t newsize; 5715 struct inode *inode; 5716 int rc; 5717 5718 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5719 return -EACCES; 5720 5721 newsize = le64_to_cpu(file_eof_info->EndOfFile); 5722 inode = file_inode(fp->filp); 5723 5724 /* 5725 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 5726 * on FAT32 shared device, truncate execution time is too long 5727 * and network error could cause from windows client. because 5728 * truncate of some filesystem like FAT32 fill zero data in 5729 * truncated range. 5730 */ 5731 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { 5732 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 5733 rc = ksmbd_vfs_truncate(work, fp, newsize); 5734 if (rc) { 5735 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 5736 if (rc != -EAGAIN) 5737 rc = -EBADF; 5738 return rc; 5739 } 5740 } 5741 return 0; 5742 } 5743 5744 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5745 struct smb2_file_rename_info *rename_info, 5746 unsigned int buf_len) 5747 { 5748 if (!(fp->daccess & FILE_DELETE_LE)) { 5749 pr_err("no right to delete : 0x%x\n", fp->daccess); 5750 return -EACCES; 5751 } 5752 5753 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 5754 le32_to_cpu(rename_info->FileNameLength)) 5755 return -EINVAL; 5756 5757 if (!le32_to_cpu(rename_info->FileNameLength)) 5758 return -EINVAL; 5759 5760 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 5761 } 5762 5763 static int set_file_disposition_info(struct ksmbd_file *fp, 5764 struct smb2_file_disposition_info *file_info) 5765 { 5766 struct inode *inode; 5767 5768 if (!(fp->daccess & FILE_DELETE_LE)) { 5769 pr_err("no right to delete : 0x%x\n", fp->daccess); 5770 return -EACCES; 5771 } 5772 5773 inode = file_inode(fp->filp); 5774 if (file_info->DeletePending) { 5775 if (S_ISDIR(inode->i_mode) && 5776 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 5777 return -EBUSY; 5778 ksmbd_set_inode_pending_delete(fp); 5779 } else { 5780 ksmbd_clear_inode_pending_delete(fp); 5781 } 5782 return 0; 5783 } 5784 5785 static int set_file_position_info(struct ksmbd_file *fp, 5786 struct smb2_file_pos_info *file_info) 5787 { 5788 loff_t current_byte_offset; 5789 unsigned long sector_size; 5790 struct inode *inode; 5791 5792 inode = file_inode(fp->filp); 5793 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 5794 sector_size = inode->i_sb->s_blocksize; 5795 5796 if (current_byte_offset < 0 || 5797 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 5798 current_byte_offset & (sector_size - 1))) { 5799 pr_err("CurrentByteOffset is not valid : %llu\n", 5800 current_byte_offset); 5801 return -EINVAL; 5802 } 5803 5804 fp->filp->f_pos = current_byte_offset; 5805 return 0; 5806 } 5807 5808 static int set_file_mode_info(struct ksmbd_file *fp, 5809 struct smb2_file_mode_info *file_info) 5810 { 5811 __le32 mode; 5812 5813 mode = file_info->Mode; 5814 5815 if ((mode & ~FILE_MODE_INFO_MASK)) { 5816 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 5817 return -EINVAL; 5818 } 5819 5820 /* 5821 * TODO : need to implement consideration for 5822 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 5823 */ 5824 ksmbd_vfs_set_fadvise(fp->filp, mode); 5825 fp->coption = mode; 5826 return 0; 5827 } 5828 5829 /** 5830 * smb2_set_info_file() - handler for smb2 set info command 5831 * @work: smb work containing set info command buffer 5832 * @fp: ksmbd_file pointer 5833 * @req: request buffer pointer 5834 * @share: ksmbd_share_config pointer 5835 * 5836 * Return: 0 on success, otherwise error 5837 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH 5838 */ 5839 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 5840 struct smb2_set_info_req *req, 5841 struct ksmbd_share_config *share) 5842 { 5843 unsigned int buf_len = le32_to_cpu(req->BufferLength); 5844 5845 switch (req->FileInfoClass) { 5846 case FILE_BASIC_INFORMATION: 5847 { 5848 if (buf_len < sizeof(struct smb2_file_basic_info)) 5849 return -EINVAL; 5850 5851 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share); 5852 } 5853 case FILE_ALLOCATION_INFORMATION: 5854 { 5855 if (buf_len < sizeof(struct smb2_file_alloc_info)) 5856 return -EINVAL; 5857 5858 return set_file_allocation_info(work, fp, 5859 (struct smb2_file_alloc_info *)req->Buffer); 5860 } 5861 case FILE_END_OF_FILE_INFORMATION: 5862 { 5863 if (buf_len < sizeof(struct smb2_file_eof_info)) 5864 return -EINVAL; 5865 5866 return set_end_of_file_info(work, fp, 5867 (struct smb2_file_eof_info *)req->Buffer); 5868 } 5869 case FILE_RENAME_INFORMATION: 5870 { 5871 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 5872 ksmbd_debug(SMB, 5873 "User does not have write permission\n"); 5874 return -EACCES; 5875 } 5876 5877 if (buf_len < sizeof(struct smb2_file_rename_info)) 5878 return -EINVAL; 5879 5880 return set_rename_info(work, fp, 5881 (struct smb2_file_rename_info *)req->Buffer, 5882 buf_len); 5883 } 5884 case FILE_LINK_INFORMATION: 5885 { 5886 if (buf_len < sizeof(struct smb2_file_link_info)) 5887 return -EINVAL; 5888 5889 return smb2_create_link(work, work->tcon->share_conf, 5890 (struct smb2_file_link_info *)req->Buffer, 5891 buf_len, fp->filp, 5892 work->conn->local_nls); 5893 } 5894 case FILE_DISPOSITION_INFORMATION: 5895 { 5896 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 5897 ksmbd_debug(SMB, 5898 "User does not have write permission\n"); 5899 return -EACCES; 5900 } 5901 5902 if (buf_len < sizeof(struct smb2_file_disposition_info)) 5903 return -EINVAL; 5904 5905 return set_file_disposition_info(fp, 5906 (struct smb2_file_disposition_info *)req->Buffer); 5907 } 5908 case FILE_FULL_EA_INFORMATION: 5909 { 5910 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 5911 pr_err("Not permitted to write ext attr: 0x%x\n", 5912 fp->daccess); 5913 return -EACCES; 5914 } 5915 5916 if (buf_len < sizeof(struct smb2_ea_info)) 5917 return -EINVAL; 5918 5919 return smb2_set_ea((struct smb2_ea_info *)req->Buffer, 5920 buf_len, &fp->filp->f_path); 5921 } 5922 case FILE_POSITION_INFORMATION: 5923 { 5924 if (buf_len < sizeof(struct smb2_file_pos_info)) 5925 return -EINVAL; 5926 5927 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer); 5928 } 5929 case FILE_MODE_INFORMATION: 5930 { 5931 if (buf_len < sizeof(struct smb2_file_mode_info)) 5932 return -EINVAL; 5933 5934 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer); 5935 } 5936 } 5937 5938 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 5939 return -EOPNOTSUPP; 5940 } 5941 5942 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 5943 char *buffer, int buf_len) 5944 { 5945 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 5946 5947 fp->saccess |= FILE_SHARE_DELETE_LE; 5948 5949 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 5950 buf_len, false); 5951 } 5952 5953 /** 5954 * smb2_set_info() - handler for smb2 set info command handler 5955 * @work: smb work containing set info request buffer 5956 * 5957 * Return: 0 on success, otherwise error 5958 */ 5959 int smb2_set_info(struct ksmbd_work *work) 5960 { 5961 struct smb2_set_info_req *req; 5962 struct smb2_set_info_rsp *rsp; 5963 struct ksmbd_file *fp; 5964 int rc = 0; 5965 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5966 5967 ksmbd_debug(SMB, "Received set info request\n"); 5968 5969 if (work->next_smb2_rcv_hdr_off) { 5970 req = ksmbd_req_buf_next(work); 5971 rsp = ksmbd_resp_buf_next(work); 5972 if (!has_file_id(req->VolatileFileId)) { 5973 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5974 work->compound_fid); 5975 id = work->compound_fid; 5976 pid = work->compound_pfid; 5977 } 5978 } else { 5979 req = smb2_get_msg(work->request_buf); 5980 rsp = smb2_get_msg(work->response_buf); 5981 } 5982 5983 if (!has_file_id(id)) { 5984 id = req->VolatileFileId; 5985 pid = req->PersistentFileId; 5986 } 5987 5988 fp = ksmbd_lookup_fd_slow(work, id, pid); 5989 if (!fp) { 5990 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 5991 rc = -ENOENT; 5992 goto err_out; 5993 } 5994 5995 switch (req->InfoType) { 5996 case SMB2_O_INFO_FILE: 5997 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5998 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 5999 break; 6000 case SMB2_O_INFO_SECURITY: 6001 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6002 if (ksmbd_override_fsids(work)) { 6003 rc = -ENOMEM; 6004 goto err_out; 6005 } 6006 rc = smb2_set_info_sec(fp, 6007 le32_to_cpu(req->AdditionalInformation), 6008 req->Buffer, 6009 le32_to_cpu(req->BufferLength)); 6010 ksmbd_revert_fsids(work); 6011 break; 6012 default: 6013 rc = -EOPNOTSUPP; 6014 } 6015 6016 if (rc < 0) 6017 goto err_out; 6018 6019 rsp->StructureSize = cpu_to_le16(2); 6020 inc_rfc1001_len(work->response_buf, 2); 6021 ksmbd_fd_put(work, fp); 6022 return 0; 6023 6024 err_out: 6025 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6026 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6027 else if (rc == -EINVAL) 6028 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6029 else if (rc == -ESHARE) 6030 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6031 else if (rc == -ENOENT) 6032 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6033 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6034 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6035 else if (rc == -EAGAIN) 6036 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6037 else if (rc == -EBADF || rc == -ESTALE) 6038 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6039 else if (rc == -EEXIST) 6040 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6041 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6042 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6043 smb2_set_err_rsp(work); 6044 ksmbd_fd_put(work, fp); 6045 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6046 return rc; 6047 } 6048 6049 /** 6050 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6051 * @work: smb work containing read IPC pipe command buffer 6052 * 6053 * Return: 0 on success, otherwise error 6054 */ 6055 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6056 { 6057 int nbytes = 0, err; 6058 u64 id; 6059 struct ksmbd_rpc_command *rpc_resp; 6060 struct smb2_read_req *req = smb2_get_msg(work->request_buf); 6061 struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf); 6062 6063 id = req->VolatileFileId; 6064 6065 inc_rfc1001_len(work->response_buf, 16); 6066 rpc_resp = ksmbd_rpc_read(work->sess, id); 6067 if (rpc_resp) { 6068 if (rpc_resp->flags != KSMBD_RPC_OK) { 6069 err = -EINVAL; 6070 goto out; 6071 } 6072 6073 work->aux_payload_buf = 6074 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO); 6075 if (!work->aux_payload_buf) { 6076 err = -ENOMEM; 6077 goto out; 6078 } 6079 6080 memcpy(work->aux_payload_buf, rpc_resp->payload, 6081 rpc_resp->payload_sz); 6082 6083 nbytes = rpc_resp->payload_sz; 6084 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4; 6085 work->aux_payload_sz = nbytes; 6086 kvfree(rpc_resp); 6087 } 6088 6089 rsp->StructureSize = cpu_to_le16(17); 6090 rsp->DataOffset = 80; 6091 rsp->Reserved = 0; 6092 rsp->DataLength = cpu_to_le32(nbytes); 6093 rsp->DataRemaining = 0; 6094 rsp->Flags = 0; 6095 inc_rfc1001_len(work->response_buf, nbytes); 6096 return 0; 6097 6098 out: 6099 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6100 smb2_set_err_rsp(work); 6101 kvfree(rpc_resp); 6102 return err; 6103 } 6104 6105 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6106 struct smb2_buffer_desc_v1 *desc, 6107 __le32 Channel, 6108 __le16 ChannelInfoLength) 6109 { 6110 unsigned int i, ch_count; 6111 6112 if (work->conn->dialect == SMB30_PROT_ID && 6113 Channel != SMB2_CHANNEL_RDMA_V1) 6114 return -EINVAL; 6115 6116 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6117 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6118 for (i = 0; i < ch_count; i++) { 6119 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6120 i, 6121 le32_to_cpu(desc[i].token), 6122 le32_to_cpu(desc[i].length)); 6123 } 6124 } 6125 if (!ch_count) 6126 return -EINVAL; 6127 6128 work->need_invalidate_rkey = 6129 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6130 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6131 work->remote_key = le32_to_cpu(desc->token); 6132 return 0; 6133 } 6134 6135 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6136 struct smb2_read_req *req, void *data_buf, 6137 size_t length) 6138 { 6139 int err; 6140 6141 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6142 (struct smb2_buffer_desc_v1 *) 6143 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6144 le16_to_cpu(req->ReadChannelInfoLength)); 6145 if (err) 6146 return err; 6147 6148 return length; 6149 } 6150 6151 /** 6152 * smb2_read() - handler for smb2 read from file 6153 * @work: smb work containing read command buffer 6154 * 6155 * Return: 0 on success, otherwise error 6156 */ 6157 int smb2_read(struct ksmbd_work *work) 6158 { 6159 struct ksmbd_conn *conn = work->conn; 6160 struct smb2_read_req *req; 6161 struct smb2_read_rsp *rsp; 6162 struct ksmbd_file *fp = NULL; 6163 loff_t offset; 6164 size_t length, mincount; 6165 ssize_t nbytes = 0, remain_bytes = 0; 6166 int err = 0; 6167 bool is_rdma_channel = false; 6168 unsigned int max_read_size = conn->vals->max_read_size; 6169 6170 WORK_BUFFERS(work, req, rsp); 6171 6172 if (test_share_config_flag(work->tcon->share_conf, 6173 KSMBD_SHARE_FLAG_PIPE)) { 6174 ksmbd_debug(SMB, "IPC pipe read request\n"); 6175 return smb2_read_pipe(work); 6176 } 6177 6178 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6179 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6180 is_rdma_channel = true; 6181 max_read_size = get_smbd_max_read_write_size(); 6182 } 6183 6184 if (is_rdma_channel == true) { 6185 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6186 6187 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6188 err = -EINVAL; 6189 goto out; 6190 } 6191 err = smb2_set_remote_key_for_rdma(work, 6192 (struct smb2_buffer_desc_v1 *) 6193 ((char *)req + ch_offset), 6194 req->Channel, 6195 req->ReadChannelInfoLength); 6196 if (err) 6197 goto out; 6198 } 6199 6200 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6201 if (!fp) { 6202 err = -ENOENT; 6203 goto out; 6204 } 6205 6206 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6207 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6208 err = -EACCES; 6209 goto out; 6210 } 6211 6212 offset = le64_to_cpu(req->Offset); 6213 length = le32_to_cpu(req->Length); 6214 mincount = le32_to_cpu(req->MinimumCount); 6215 6216 if (length > max_read_size) { 6217 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6218 max_read_size); 6219 err = -EINVAL; 6220 goto out; 6221 } 6222 6223 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6224 fp->filp, offset, length); 6225 6226 work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO); 6227 if (!work->aux_payload_buf) { 6228 err = -ENOMEM; 6229 goto out; 6230 } 6231 6232 nbytes = ksmbd_vfs_read(work, fp, length, &offset); 6233 if (nbytes < 0) { 6234 err = nbytes; 6235 goto out; 6236 } 6237 6238 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6239 kvfree(work->aux_payload_buf); 6240 work->aux_payload_buf = NULL; 6241 rsp->hdr.Status = STATUS_END_OF_FILE; 6242 smb2_set_err_rsp(work); 6243 ksmbd_fd_put(work, fp); 6244 return 0; 6245 } 6246 6247 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6248 nbytes, offset, mincount); 6249 6250 if (is_rdma_channel == true) { 6251 /* write data to the client using rdma channel */ 6252 remain_bytes = smb2_read_rdma_channel(work, req, 6253 work->aux_payload_buf, 6254 nbytes); 6255 kvfree(work->aux_payload_buf); 6256 work->aux_payload_buf = NULL; 6257 6258 nbytes = 0; 6259 if (remain_bytes < 0) { 6260 err = (int)remain_bytes; 6261 goto out; 6262 } 6263 } 6264 6265 rsp->StructureSize = cpu_to_le16(17); 6266 rsp->DataOffset = 80; 6267 rsp->Reserved = 0; 6268 rsp->DataLength = cpu_to_le32(nbytes); 6269 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6270 rsp->Flags = 0; 6271 inc_rfc1001_len(work->response_buf, 16); 6272 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4; 6273 work->aux_payload_sz = nbytes; 6274 inc_rfc1001_len(work->response_buf, nbytes); 6275 ksmbd_fd_put(work, fp); 6276 return 0; 6277 6278 out: 6279 if (err) { 6280 if (err == -EISDIR) 6281 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6282 else if (err == -EAGAIN) 6283 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6284 else if (err == -ENOENT) 6285 rsp->hdr.Status = STATUS_FILE_CLOSED; 6286 else if (err == -EACCES) 6287 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6288 else if (err == -ESHARE) 6289 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6290 else if (err == -EINVAL) 6291 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6292 else 6293 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6294 6295 smb2_set_err_rsp(work); 6296 } 6297 ksmbd_fd_put(work, fp); 6298 return err; 6299 } 6300 6301 /** 6302 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6303 * @work: smb work containing write IPC pipe command buffer 6304 * 6305 * Return: 0 on success, otherwise error 6306 */ 6307 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6308 { 6309 struct smb2_write_req *req = smb2_get_msg(work->request_buf); 6310 struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf); 6311 struct ksmbd_rpc_command *rpc_resp; 6312 u64 id = 0; 6313 int err = 0, ret = 0; 6314 char *data_buf; 6315 size_t length; 6316 6317 length = le32_to_cpu(req->Length); 6318 id = req->VolatileFileId; 6319 6320 if ((u64)le16_to_cpu(req->DataOffset) + length > 6321 get_rfc1002_len(work->request_buf)) { 6322 pr_err("invalid write data offset %u, smb_len %u\n", 6323 le16_to_cpu(req->DataOffset), 6324 get_rfc1002_len(work->request_buf)); 6325 err = -EINVAL; 6326 goto out; 6327 } 6328 6329 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6330 le16_to_cpu(req->DataOffset)); 6331 6332 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6333 if (rpc_resp) { 6334 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6335 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6336 kvfree(rpc_resp); 6337 smb2_set_err_rsp(work); 6338 return -EOPNOTSUPP; 6339 } 6340 if (rpc_resp->flags != KSMBD_RPC_OK) { 6341 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6342 smb2_set_err_rsp(work); 6343 kvfree(rpc_resp); 6344 return ret; 6345 } 6346 kvfree(rpc_resp); 6347 } 6348 6349 rsp->StructureSize = cpu_to_le16(17); 6350 rsp->DataOffset = 0; 6351 rsp->Reserved = 0; 6352 rsp->DataLength = cpu_to_le32(length); 6353 rsp->DataRemaining = 0; 6354 rsp->Reserved2 = 0; 6355 inc_rfc1001_len(work->response_buf, 16); 6356 return 0; 6357 out: 6358 if (err) { 6359 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6360 smb2_set_err_rsp(work); 6361 } 6362 6363 return err; 6364 } 6365 6366 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6367 struct smb2_write_req *req, 6368 struct ksmbd_file *fp, 6369 loff_t offset, size_t length, bool sync) 6370 { 6371 char *data_buf; 6372 int ret; 6373 ssize_t nbytes; 6374 6375 data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO); 6376 if (!data_buf) 6377 return -ENOMEM; 6378 6379 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6380 (struct smb2_buffer_desc_v1 *) 6381 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6382 le16_to_cpu(req->WriteChannelInfoLength)); 6383 if (ret < 0) { 6384 kvfree(data_buf); 6385 return ret; 6386 } 6387 6388 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 6389 kvfree(data_buf); 6390 if (ret < 0) 6391 return ret; 6392 6393 return nbytes; 6394 } 6395 6396 /** 6397 * smb2_write() - handler for smb2 write from file 6398 * @work: smb work containing write command buffer 6399 * 6400 * Return: 0 on success, otherwise error 6401 */ 6402 int smb2_write(struct ksmbd_work *work) 6403 { 6404 struct smb2_write_req *req; 6405 struct smb2_write_rsp *rsp; 6406 struct ksmbd_file *fp = NULL; 6407 loff_t offset; 6408 size_t length; 6409 ssize_t nbytes; 6410 char *data_buf; 6411 bool writethrough = false, is_rdma_channel = false; 6412 int err = 0; 6413 unsigned int max_write_size = work->conn->vals->max_write_size; 6414 6415 WORK_BUFFERS(work, req, rsp); 6416 6417 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 6418 ksmbd_debug(SMB, "IPC pipe write request\n"); 6419 return smb2_write_pipe(work); 6420 } 6421 6422 offset = le64_to_cpu(req->Offset); 6423 length = le32_to_cpu(req->Length); 6424 6425 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 6426 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 6427 is_rdma_channel = true; 6428 max_write_size = get_smbd_max_read_write_size(); 6429 length = le32_to_cpu(req->RemainingBytes); 6430 } 6431 6432 if (is_rdma_channel == true) { 6433 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 6434 6435 if (req->Length != 0 || req->DataOffset != 0 || 6436 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 6437 err = -EINVAL; 6438 goto out; 6439 } 6440 err = smb2_set_remote_key_for_rdma(work, 6441 (struct smb2_buffer_desc_v1 *) 6442 ((char *)req + ch_offset), 6443 req->Channel, 6444 req->WriteChannelInfoLength); 6445 if (err) 6446 goto out; 6447 } 6448 6449 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6450 ksmbd_debug(SMB, "User does not have write permission\n"); 6451 err = -EACCES; 6452 goto out; 6453 } 6454 6455 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6456 if (!fp) { 6457 err = -ENOENT; 6458 goto out; 6459 } 6460 6461 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6462 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 6463 err = -EACCES; 6464 goto out; 6465 } 6466 6467 if (length > max_write_size) { 6468 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 6469 max_write_size); 6470 err = -EINVAL; 6471 goto out; 6472 } 6473 6474 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 6475 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 6476 writethrough = true; 6477 6478 if (is_rdma_channel == false) { 6479 if (le16_to_cpu(req->DataOffset) < 6480 offsetof(struct smb2_write_req, Buffer)) { 6481 err = -EINVAL; 6482 goto out; 6483 } 6484 6485 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6486 le16_to_cpu(req->DataOffset)); 6487 6488 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6489 fp->filp, offset, length); 6490 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 6491 writethrough, &nbytes); 6492 if (err < 0) 6493 goto out; 6494 } else { 6495 /* read data from the client using rdma channel, and 6496 * write the data. 6497 */ 6498 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 6499 writethrough); 6500 if (nbytes < 0) { 6501 err = (int)nbytes; 6502 goto out; 6503 } 6504 } 6505 6506 rsp->StructureSize = cpu_to_le16(17); 6507 rsp->DataOffset = 0; 6508 rsp->Reserved = 0; 6509 rsp->DataLength = cpu_to_le32(nbytes); 6510 rsp->DataRemaining = 0; 6511 rsp->Reserved2 = 0; 6512 inc_rfc1001_len(work->response_buf, 16); 6513 ksmbd_fd_put(work, fp); 6514 return 0; 6515 6516 out: 6517 if (err == -EAGAIN) 6518 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6519 else if (err == -ENOSPC || err == -EFBIG) 6520 rsp->hdr.Status = STATUS_DISK_FULL; 6521 else if (err == -ENOENT) 6522 rsp->hdr.Status = STATUS_FILE_CLOSED; 6523 else if (err == -EACCES) 6524 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6525 else if (err == -ESHARE) 6526 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6527 else if (err == -EINVAL) 6528 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6529 else 6530 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6531 6532 smb2_set_err_rsp(work); 6533 ksmbd_fd_put(work, fp); 6534 return err; 6535 } 6536 6537 /** 6538 * smb2_flush() - handler for smb2 flush file - fsync 6539 * @work: smb work containing flush command buffer 6540 * 6541 * Return: 0 on success, otherwise error 6542 */ 6543 int smb2_flush(struct ksmbd_work *work) 6544 { 6545 struct smb2_flush_req *req; 6546 struct smb2_flush_rsp *rsp; 6547 int err; 6548 6549 WORK_BUFFERS(work, req, rsp); 6550 6551 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); 6552 6553 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 6554 if (err) 6555 goto out; 6556 6557 rsp->StructureSize = cpu_to_le16(4); 6558 rsp->Reserved = 0; 6559 inc_rfc1001_len(work->response_buf, 4); 6560 return 0; 6561 6562 out: 6563 if (err) { 6564 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6565 smb2_set_err_rsp(work); 6566 } 6567 6568 return err; 6569 } 6570 6571 /** 6572 * smb2_cancel() - handler for smb2 cancel command 6573 * @work: smb work containing cancel command buffer 6574 * 6575 * Return: 0 on success, otherwise error 6576 */ 6577 int smb2_cancel(struct ksmbd_work *work) 6578 { 6579 struct ksmbd_conn *conn = work->conn; 6580 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 6581 struct smb2_hdr *chdr; 6582 struct ksmbd_work *iter; 6583 struct list_head *command_list; 6584 6585 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 6586 hdr->MessageId, hdr->Flags); 6587 6588 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 6589 command_list = &conn->async_requests; 6590 6591 spin_lock(&conn->request_lock); 6592 list_for_each_entry(iter, command_list, 6593 async_request_entry) { 6594 chdr = smb2_get_msg(iter->request_buf); 6595 6596 if (iter->async_id != 6597 le64_to_cpu(hdr->Id.AsyncId)) 6598 continue; 6599 6600 ksmbd_debug(SMB, 6601 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 6602 le64_to_cpu(hdr->Id.AsyncId), 6603 le16_to_cpu(chdr->Command)); 6604 iter->state = KSMBD_WORK_CANCELLED; 6605 if (iter->cancel_fn) 6606 iter->cancel_fn(iter->cancel_argv); 6607 break; 6608 } 6609 spin_unlock(&conn->request_lock); 6610 } else { 6611 command_list = &conn->requests; 6612 6613 spin_lock(&conn->request_lock); 6614 list_for_each_entry(iter, command_list, request_entry) { 6615 chdr = smb2_get_msg(iter->request_buf); 6616 6617 if (chdr->MessageId != hdr->MessageId || 6618 iter == work) 6619 continue; 6620 6621 ksmbd_debug(SMB, 6622 "smb2 with mid %llu cancelled command = 0x%x\n", 6623 le64_to_cpu(hdr->MessageId), 6624 le16_to_cpu(chdr->Command)); 6625 iter->state = KSMBD_WORK_CANCELLED; 6626 break; 6627 } 6628 spin_unlock(&conn->request_lock); 6629 } 6630 6631 /* For SMB2_CANCEL command itself send no response*/ 6632 work->send_no_response = 1; 6633 return 0; 6634 } 6635 6636 struct file_lock *smb_flock_init(struct file *f) 6637 { 6638 struct file_lock *fl; 6639 6640 fl = locks_alloc_lock(); 6641 if (!fl) 6642 goto out; 6643 6644 locks_init_lock(fl); 6645 6646 fl->fl_owner = f; 6647 fl->fl_pid = current->tgid; 6648 fl->fl_file = f; 6649 fl->fl_flags = FL_POSIX; 6650 fl->fl_ops = NULL; 6651 fl->fl_lmops = NULL; 6652 6653 out: 6654 return fl; 6655 } 6656 6657 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 6658 { 6659 int cmd = -EINVAL; 6660 6661 /* Checking for wrong flag combination during lock request*/ 6662 switch (flags) { 6663 case SMB2_LOCKFLAG_SHARED: 6664 ksmbd_debug(SMB, "received shared request\n"); 6665 cmd = F_SETLKW; 6666 flock->fl_type = F_RDLCK; 6667 flock->fl_flags |= FL_SLEEP; 6668 break; 6669 case SMB2_LOCKFLAG_EXCLUSIVE: 6670 ksmbd_debug(SMB, "received exclusive request\n"); 6671 cmd = F_SETLKW; 6672 flock->fl_type = F_WRLCK; 6673 flock->fl_flags |= FL_SLEEP; 6674 break; 6675 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6676 ksmbd_debug(SMB, 6677 "received shared & fail immediately request\n"); 6678 cmd = F_SETLK; 6679 flock->fl_type = F_RDLCK; 6680 break; 6681 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6682 ksmbd_debug(SMB, 6683 "received exclusive & fail immediately request\n"); 6684 cmd = F_SETLK; 6685 flock->fl_type = F_WRLCK; 6686 break; 6687 case SMB2_LOCKFLAG_UNLOCK: 6688 ksmbd_debug(SMB, "received unlock request\n"); 6689 flock->fl_type = F_UNLCK; 6690 cmd = F_SETLK; 6691 break; 6692 } 6693 6694 return cmd; 6695 } 6696 6697 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 6698 unsigned int cmd, int flags, 6699 struct list_head *lock_list) 6700 { 6701 struct ksmbd_lock *lock; 6702 6703 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); 6704 if (!lock) 6705 return NULL; 6706 6707 lock->cmd = cmd; 6708 lock->fl = flock; 6709 lock->start = flock->fl_start; 6710 lock->end = flock->fl_end; 6711 lock->flags = flags; 6712 if (lock->start == lock->end) 6713 lock->zero_len = 1; 6714 INIT_LIST_HEAD(&lock->clist); 6715 INIT_LIST_HEAD(&lock->flist); 6716 INIT_LIST_HEAD(&lock->llist); 6717 list_add_tail(&lock->llist, lock_list); 6718 6719 return lock; 6720 } 6721 6722 static void smb2_remove_blocked_lock(void **argv) 6723 { 6724 struct file_lock *flock = (struct file_lock *)argv[0]; 6725 6726 ksmbd_vfs_posix_lock_unblock(flock); 6727 wake_up(&flock->fl_wait); 6728 } 6729 6730 static inline bool lock_defer_pending(struct file_lock *fl) 6731 { 6732 /* check pending lock waiters */ 6733 return waitqueue_active(&fl->fl_wait); 6734 } 6735 6736 /** 6737 * smb2_lock() - handler for smb2 file lock command 6738 * @work: smb work containing lock command buffer 6739 * 6740 * Return: 0 on success, otherwise error 6741 */ 6742 int smb2_lock(struct ksmbd_work *work) 6743 { 6744 struct smb2_lock_req *req = smb2_get_msg(work->request_buf); 6745 struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf); 6746 struct smb2_lock_element *lock_ele; 6747 struct ksmbd_file *fp = NULL; 6748 struct file_lock *flock = NULL; 6749 struct file *filp = NULL; 6750 int lock_count; 6751 int flags = 0; 6752 int cmd = 0; 6753 int err = -EIO, i, rc = 0; 6754 u64 lock_start, lock_length; 6755 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 6756 struct ksmbd_conn *conn; 6757 int nolock = 0; 6758 LIST_HEAD(lock_list); 6759 LIST_HEAD(rollback_list); 6760 int prior_lock = 0; 6761 6762 ksmbd_debug(SMB, "Received lock request\n"); 6763 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6764 if (!fp) { 6765 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 6766 err = -ENOENT; 6767 goto out2; 6768 } 6769 6770 filp = fp->filp; 6771 lock_count = le16_to_cpu(req->LockCount); 6772 lock_ele = req->locks; 6773 6774 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 6775 if (!lock_count) { 6776 err = -EINVAL; 6777 goto out2; 6778 } 6779 6780 for (i = 0; i < lock_count; i++) { 6781 flags = le32_to_cpu(lock_ele[i].Flags); 6782 6783 flock = smb_flock_init(filp); 6784 if (!flock) 6785 goto out; 6786 6787 cmd = smb2_set_flock_flags(flock, flags); 6788 6789 lock_start = le64_to_cpu(lock_ele[i].Offset); 6790 lock_length = le64_to_cpu(lock_ele[i].Length); 6791 if (lock_start > U64_MAX - lock_length) { 6792 pr_err("Invalid lock range requested\n"); 6793 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6794 locks_free_lock(flock); 6795 goto out; 6796 } 6797 6798 if (lock_start > OFFSET_MAX) 6799 flock->fl_start = OFFSET_MAX; 6800 else 6801 flock->fl_start = lock_start; 6802 6803 lock_length = le64_to_cpu(lock_ele[i].Length); 6804 if (lock_length > OFFSET_MAX - flock->fl_start) 6805 lock_length = OFFSET_MAX - flock->fl_start; 6806 6807 flock->fl_end = flock->fl_start + lock_length; 6808 6809 if (flock->fl_end < flock->fl_start) { 6810 ksmbd_debug(SMB, 6811 "the end offset(%llx) is smaller than the start offset(%llx)\n", 6812 flock->fl_end, flock->fl_start); 6813 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6814 locks_free_lock(flock); 6815 goto out; 6816 } 6817 6818 /* Check conflict locks in one request */ 6819 list_for_each_entry(cmp_lock, &lock_list, llist) { 6820 if (cmp_lock->fl->fl_start <= flock->fl_start && 6821 cmp_lock->fl->fl_end >= flock->fl_end) { 6822 if (cmp_lock->fl->fl_type != F_UNLCK && 6823 flock->fl_type != F_UNLCK) { 6824 pr_err("conflict two locks in one request\n"); 6825 err = -EINVAL; 6826 locks_free_lock(flock); 6827 goto out; 6828 } 6829 } 6830 } 6831 6832 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 6833 if (!smb_lock) { 6834 err = -EINVAL; 6835 locks_free_lock(flock); 6836 goto out; 6837 } 6838 } 6839 6840 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 6841 if (smb_lock->cmd < 0) { 6842 err = -EINVAL; 6843 goto out; 6844 } 6845 6846 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 6847 err = -EINVAL; 6848 goto out; 6849 } 6850 6851 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 6852 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 6853 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 6854 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 6855 err = -EINVAL; 6856 goto out; 6857 } 6858 6859 prior_lock = smb_lock->flags; 6860 6861 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 6862 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 6863 goto no_check_cl; 6864 6865 nolock = 1; 6866 /* check locks in connection list */ 6867 down_read(&conn_list_lock); 6868 list_for_each_entry(conn, &conn_list, conns_list) { 6869 spin_lock(&conn->llist_lock); 6870 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 6871 if (file_inode(cmp_lock->fl->fl_file) != 6872 file_inode(smb_lock->fl->fl_file)) 6873 continue; 6874 6875 if (smb_lock->fl->fl_type == F_UNLCK) { 6876 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file && 6877 cmp_lock->start == smb_lock->start && 6878 cmp_lock->end == smb_lock->end && 6879 !lock_defer_pending(cmp_lock->fl)) { 6880 nolock = 0; 6881 list_del(&cmp_lock->flist); 6882 list_del(&cmp_lock->clist); 6883 spin_unlock(&conn->llist_lock); 6884 up_read(&conn_list_lock); 6885 6886 locks_free_lock(cmp_lock->fl); 6887 kfree(cmp_lock); 6888 goto out_check_cl; 6889 } 6890 continue; 6891 } 6892 6893 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) { 6894 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 6895 continue; 6896 } else { 6897 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 6898 continue; 6899 } 6900 6901 /* check zero byte lock range */ 6902 if (cmp_lock->zero_len && !smb_lock->zero_len && 6903 cmp_lock->start > smb_lock->start && 6904 cmp_lock->start < smb_lock->end) { 6905 spin_unlock(&conn->llist_lock); 6906 up_read(&conn_list_lock); 6907 pr_err("previous lock conflict with zero byte lock range\n"); 6908 goto out; 6909 } 6910 6911 if (smb_lock->zero_len && !cmp_lock->zero_len && 6912 smb_lock->start > cmp_lock->start && 6913 smb_lock->start < cmp_lock->end) { 6914 spin_unlock(&conn->llist_lock); 6915 up_read(&conn_list_lock); 6916 pr_err("current lock conflict with zero byte lock range\n"); 6917 goto out; 6918 } 6919 6920 if (((cmp_lock->start <= smb_lock->start && 6921 cmp_lock->end > smb_lock->start) || 6922 (cmp_lock->start < smb_lock->end && 6923 cmp_lock->end >= smb_lock->end)) && 6924 !cmp_lock->zero_len && !smb_lock->zero_len) { 6925 spin_unlock(&conn->llist_lock); 6926 up_read(&conn_list_lock); 6927 pr_err("Not allow lock operation on exclusive lock range\n"); 6928 goto out; 6929 } 6930 } 6931 spin_unlock(&conn->llist_lock); 6932 } 6933 up_read(&conn_list_lock); 6934 out_check_cl: 6935 if (smb_lock->fl->fl_type == F_UNLCK && nolock) { 6936 pr_err("Try to unlock nolocked range\n"); 6937 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 6938 goto out; 6939 } 6940 6941 no_check_cl: 6942 if (smb_lock->zero_len) { 6943 err = 0; 6944 goto skip; 6945 } 6946 6947 flock = smb_lock->fl; 6948 list_del(&smb_lock->llist); 6949 retry: 6950 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 6951 skip: 6952 if (flags & SMB2_LOCKFLAG_UNLOCK) { 6953 if (!rc) { 6954 ksmbd_debug(SMB, "File unlocked\n"); 6955 } else if (rc == -ENOENT) { 6956 rsp->hdr.Status = STATUS_NOT_LOCKED; 6957 goto out; 6958 } 6959 locks_free_lock(flock); 6960 kfree(smb_lock); 6961 } else { 6962 if (rc == FILE_LOCK_DEFERRED) { 6963 void **argv; 6964 6965 ksmbd_debug(SMB, 6966 "would have to wait for getting lock\n"); 6967 spin_lock(&work->conn->llist_lock); 6968 list_add_tail(&smb_lock->clist, 6969 &work->conn->lock_list); 6970 spin_unlock(&work->conn->llist_lock); 6971 list_add(&smb_lock->llist, &rollback_list); 6972 6973 argv = kmalloc(sizeof(void *), GFP_KERNEL); 6974 if (!argv) { 6975 err = -ENOMEM; 6976 goto out; 6977 } 6978 argv[0] = flock; 6979 6980 rc = setup_async_work(work, 6981 smb2_remove_blocked_lock, 6982 argv); 6983 if (rc) { 6984 err = -ENOMEM; 6985 goto out; 6986 } 6987 spin_lock(&fp->f_lock); 6988 list_add(&work->fp_entry, &fp->blocked_works); 6989 spin_unlock(&fp->f_lock); 6990 6991 smb2_send_interim_resp(work, STATUS_PENDING); 6992 6993 ksmbd_vfs_posix_lock_wait(flock); 6994 6995 spin_lock(&fp->f_lock); 6996 list_del(&work->fp_entry); 6997 spin_unlock(&fp->f_lock); 6998 6999 if (work->state != KSMBD_WORK_ACTIVE) { 7000 list_del(&smb_lock->llist); 7001 spin_lock(&work->conn->llist_lock); 7002 list_del(&smb_lock->clist); 7003 spin_unlock(&work->conn->llist_lock); 7004 locks_free_lock(flock); 7005 7006 if (work->state == KSMBD_WORK_CANCELLED) { 7007 rsp->hdr.Status = 7008 STATUS_CANCELLED; 7009 kfree(smb_lock); 7010 smb2_send_interim_resp(work, 7011 STATUS_CANCELLED); 7012 work->send_no_response = 1; 7013 goto out; 7014 } 7015 7016 init_smb2_rsp_hdr(work); 7017 smb2_set_err_rsp(work); 7018 rsp->hdr.Status = 7019 STATUS_RANGE_NOT_LOCKED; 7020 kfree(smb_lock); 7021 goto out2; 7022 } 7023 7024 list_del(&smb_lock->llist); 7025 spin_lock(&work->conn->llist_lock); 7026 list_del(&smb_lock->clist); 7027 spin_unlock(&work->conn->llist_lock); 7028 release_async_work(work); 7029 goto retry; 7030 } else if (!rc) { 7031 spin_lock(&work->conn->llist_lock); 7032 list_add_tail(&smb_lock->clist, 7033 &work->conn->lock_list); 7034 list_add_tail(&smb_lock->flist, 7035 &fp->lock_list); 7036 spin_unlock(&work->conn->llist_lock); 7037 list_add(&smb_lock->llist, &rollback_list); 7038 ksmbd_debug(SMB, "successful in taking lock\n"); 7039 } else { 7040 goto out; 7041 } 7042 } 7043 } 7044 7045 if (atomic_read(&fp->f_ci->op_count) > 1) 7046 smb_break_all_oplock(work, fp); 7047 7048 rsp->StructureSize = cpu_to_le16(4); 7049 ksmbd_debug(SMB, "successful in taking lock\n"); 7050 rsp->hdr.Status = STATUS_SUCCESS; 7051 rsp->Reserved = 0; 7052 inc_rfc1001_len(work->response_buf, 4); 7053 ksmbd_fd_put(work, fp); 7054 return 0; 7055 7056 out: 7057 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7058 locks_free_lock(smb_lock->fl); 7059 list_del(&smb_lock->llist); 7060 kfree(smb_lock); 7061 } 7062 7063 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7064 struct file_lock *rlock = NULL; 7065 7066 rlock = smb_flock_init(filp); 7067 rlock->fl_type = F_UNLCK; 7068 rlock->fl_start = smb_lock->start; 7069 rlock->fl_end = smb_lock->end; 7070 7071 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7072 if (rc) 7073 pr_err("rollback unlock fail : %d\n", rc); 7074 7075 list_del(&smb_lock->llist); 7076 spin_lock(&work->conn->llist_lock); 7077 if (!list_empty(&smb_lock->flist)) 7078 list_del(&smb_lock->flist); 7079 list_del(&smb_lock->clist); 7080 spin_unlock(&work->conn->llist_lock); 7081 7082 locks_free_lock(smb_lock->fl); 7083 locks_free_lock(rlock); 7084 kfree(smb_lock); 7085 } 7086 out2: 7087 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7088 7089 if (!rsp->hdr.Status) { 7090 if (err == -EINVAL) 7091 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7092 else if (err == -ENOMEM) 7093 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7094 else if (err == -ENOENT) 7095 rsp->hdr.Status = STATUS_FILE_CLOSED; 7096 else 7097 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7098 } 7099 7100 smb2_set_err_rsp(work); 7101 ksmbd_fd_put(work, fp); 7102 return err; 7103 } 7104 7105 static int fsctl_copychunk(struct ksmbd_work *work, 7106 struct copychunk_ioctl_req *ci_req, 7107 unsigned int cnt_code, 7108 unsigned int input_count, 7109 unsigned long long volatile_id, 7110 unsigned long long persistent_id, 7111 struct smb2_ioctl_rsp *rsp) 7112 { 7113 struct copychunk_ioctl_rsp *ci_rsp; 7114 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7115 struct srv_copychunk *chunks; 7116 unsigned int i, chunk_count, chunk_count_written = 0; 7117 unsigned int chunk_size_written = 0; 7118 loff_t total_size_written = 0; 7119 int ret = 0; 7120 7121 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7122 7123 rsp->VolatileFileId = volatile_id; 7124 rsp->PersistentFileId = persistent_id; 7125 ci_rsp->ChunksWritten = 7126 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7127 ci_rsp->ChunkBytesWritten = 7128 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7129 ci_rsp->TotalBytesWritten = 7130 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7131 7132 chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; 7133 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7134 if (chunk_count == 0) 7135 goto out; 7136 total_size_written = 0; 7137 7138 /* verify the SRV_COPYCHUNK_COPY packet */ 7139 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7140 input_count < offsetof(struct copychunk_ioctl_req, Chunks) + 7141 chunk_count * sizeof(struct srv_copychunk)) { 7142 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7143 return -EINVAL; 7144 } 7145 7146 for (i = 0; i < chunk_count; i++) { 7147 if (le32_to_cpu(chunks[i].Length) == 0 || 7148 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7149 break; 7150 total_size_written += le32_to_cpu(chunks[i].Length); 7151 } 7152 7153 if (i < chunk_count || 7154 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7155 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7156 return -EINVAL; 7157 } 7158 7159 src_fp = ksmbd_lookup_foreign_fd(work, 7160 le64_to_cpu(ci_req->ResumeKey[0])); 7161 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7162 ret = -EINVAL; 7163 if (!src_fp || 7164 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { 7165 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7166 goto out; 7167 } 7168 7169 if (!dst_fp) { 7170 rsp->hdr.Status = STATUS_FILE_CLOSED; 7171 goto out; 7172 } 7173 7174 /* 7175 * FILE_READ_DATA should only be included in 7176 * the FSCTL_COPYCHUNK case 7177 */ 7178 if (cnt_code == FSCTL_COPYCHUNK && 7179 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7180 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7181 goto out; 7182 } 7183 7184 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7185 chunks, chunk_count, 7186 &chunk_count_written, 7187 &chunk_size_written, 7188 &total_size_written); 7189 if (ret < 0) { 7190 if (ret == -EACCES) 7191 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7192 if (ret == -EAGAIN) 7193 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7194 else if (ret == -EBADF) 7195 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7196 else if (ret == -EFBIG || ret == -ENOSPC) 7197 rsp->hdr.Status = STATUS_DISK_FULL; 7198 else if (ret == -EINVAL) 7199 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7200 else if (ret == -EISDIR) 7201 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7202 else if (ret == -E2BIG) 7203 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7204 else 7205 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7206 } 7207 7208 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7209 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7210 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7211 out: 7212 ksmbd_fd_put(work, src_fp); 7213 ksmbd_fd_put(work, dst_fp); 7214 return ret; 7215 } 7216 7217 static __be32 idev_ipv4_address(struct in_device *idev) 7218 { 7219 __be32 addr = 0; 7220 7221 struct in_ifaddr *ifa; 7222 7223 rcu_read_lock(); 7224 in_dev_for_each_ifa_rcu(ifa, idev) { 7225 if (ifa->ifa_flags & IFA_F_SECONDARY) 7226 continue; 7227 7228 addr = ifa->ifa_address; 7229 break; 7230 } 7231 rcu_read_unlock(); 7232 return addr; 7233 } 7234 7235 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7236 struct smb2_ioctl_rsp *rsp, 7237 unsigned int out_buf_len) 7238 { 7239 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7240 int nbytes = 0; 7241 struct net_device *netdev; 7242 struct sockaddr_storage_rsp *sockaddr_storage; 7243 unsigned int flags; 7244 unsigned long long speed; 7245 7246 rtnl_lock(); 7247 for_each_netdev(&init_net, netdev) { 7248 bool ipv4_set = false; 7249 7250 if (netdev->type == ARPHRD_LOOPBACK) 7251 continue; 7252 7253 flags = dev_get_flags(netdev); 7254 if (!(flags & IFF_RUNNING)) 7255 continue; 7256 ipv6_retry: 7257 if (out_buf_len < 7258 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7259 rtnl_unlock(); 7260 return -ENOSPC; 7261 } 7262 7263 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7264 &rsp->Buffer[nbytes]; 7265 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7266 7267 nii_rsp->Capability = 0; 7268 if (netdev->real_num_tx_queues > 1) 7269 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); 7270 if (ksmbd_rdma_capable_netdev(netdev)) 7271 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); 7272 7273 nii_rsp->Next = cpu_to_le32(152); 7274 nii_rsp->Reserved = 0; 7275 7276 if (netdev->ethtool_ops->get_link_ksettings) { 7277 struct ethtool_link_ksettings cmd; 7278 7279 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7280 speed = cmd.base.speed; 7281 } else { 7282 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7283 "speed is unknown, defaulting to 1Gb/sec"); 7284 speed = SPEED_1000; 7285 } 7286 7287 speed *= 1000000; 7288 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7289 7290 sockaddr_storage = (struct sockaddr_storage_rsp *) 7291 nii_rsp->SockAddr_Storage; 7292 memset(sockaddr_storage, 0, 128); 7293 7294 if (!ipv4_set) { 7295 struct in_device *idev; 7296 7297 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); 7298 sockaddr_storage->addr4.Port = 0; 7299 7300 idev = __in_dev_get_rtnl(netdev); 7301 if (!idev) 7302 continue; 7303 sockaddr_storage->addr4.IPv4address = 7304 idev_ipv4_address(idev); 7305 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7306 ipv4_set = true; 7307 goto ipv6_retry; 7308 } else { 7309 struct inet6_dev *idev6; 7310 struct inet6_ifaddr *ifa; 7311 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; 7312 7313 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); 7314 sockaddr_storage->addr6.Port = 0; 7315 sockaddr_storage->addr6.FlowInfo = 0; 7316 7317 idev6 = __in6_dev_get(netdev); 7318 if (!idev6) 7319 continue; 7320 7321 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7322 if (ifa->flags & (IFA_F_TENTATIVE | 7323 IFA_F_DEPRECATED)) 7324 continue; 7325 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7326 break; 7327 } 7328 sockaddr_storage->addr6.ScopeId = 0; 7329 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7330 } 7331 } 7332 rtnl_unlock(); 7333 7334 /* zero if this is last one */ 7335 if (nii_rsp) 7336 nii_rsp->Next = 0; 7337 7338 rsp->PersistentFileId = SMB2_NO_FID; 7339 rsp->VolatileFileId = SMB2_NO_FID; 7340 return nbytes; 7341 } 7342 7343 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7344 struct validate_negotiate_info_req *neg_req, 7345 struct validate_negotiate_info_rsp *neg_rsp, 7346 unsigned int in_buf_len) 7347 { 7348 int ret = 0; 7349 int dialect; 7350 7351 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7352 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7353 return -EINVAL; 7354 7355 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7356 neg_req->DialectCount); 7357 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7358 ret = -EINVAL; 7359 goto err_out; 7360 } 7361 7362 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7363 ret = -EINVAL; 7364 goto err_out; 7365 } 7366 7367 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7368 ret = -EINVAL; 7369 goto err_out; 7370 } 7371 7372 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7373 ret = -EINVAL; 7374 goto err_out; 7375 } 7376 7377 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 7378 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 7379 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 7380 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 7381 err_out: 7382 return ret; 7383 } 7384 7385 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 7386 struct file_allocated_range_buffer *qar_req, 7387 struct file_allocated_range_buffer *qar_rsp, 7388 unsigned int in_count, unsigned int *out_count) 7389 { 7390 struct ksmbd_file *fp; 7391 loff_t start, length; 7392 int ret = 0; 7393 7394 *out_count = 0; 7395 if (in_count == 0) 7396 return -EINVAL; 7397 7398 start = le64_to_cpu(qar_req->file_offset); 7399 length = le64_to_cpu(qar_req->length); 7400 7401 if (start < 0 || length < 0) 7402 return -EINVAL; 7403 7404 fp = ksmbd_lookup_fd_fast(work, id); 7405 if (!fp) 7406 return -ENOENT; 7407 7408 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 7409 qar_rsp, in_count, out_count); 7410 if (ret && ret != -E2BIG) 7411 *out_count = 0; 7412 7413 ksmbd_fd_put(work, fp); 7414 return ret; 7415 } 7416 7417 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 7418 unsigned int out_buf_len, 7419 struct smb2_ioctl_req *req, 7420 struct smb2_ioctl_rsp *rsp) 7421 { 7422 struct ksmbd_rpc_command *rpc_resp; 7423 char *data_buf = (char *)&req->Buffer[0]; 7424 int nbytes = 0; 7425 7426 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 7427 le32_to_cpu(req->InputCount)); 7428 if (rpc_resp) { 7429 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 7430 /* 7431 * set STATUS_SOME_NOT_MAPPED response 7432 * for unknown domain sid. 7433 */ 7434 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 7435 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7436 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7437 goto out; 7438 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 7439 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7440 goto out; 7441 } 7442 7443 nbytes = rpc_resp->payload_sz; 7444 if (rpc_resp->payload_sz > out_buf_len) { 7445 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7446 nbytes = out_buf_len; 7447 } 7448 7449 if (!rpc_resp->payload_sz) { 7450 rsp->hdr.Status = 7451 STATUS_UNEXPECTED_IO_ERROR; 7452 goto out; 7453 } 7454 7455 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 7456 } 7457 out: 7458 kvfree(rpc_resp); 7459 return nbytes; 7460 } 7461 7462 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 7463 struct file_sparse *sparse) 7464 { 7465 struct ksmbd_file *fp; 7466 struct mnt_idmap *idmap; 7467 int ret = 0; 7468 __le32 old_fattr; 7469 7470 fp = ksmbd_lookup_fd_fast(work, id); 7471 if (!fp) 7472 return -ENOENT; 7473 idmap = file_mnt_idmap(fp->filp); 7474 7475 old_fattr = fp->f_ci->m_fattr; 7476 if (sparse->SetSparse) 7477 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 7478 else 7479 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 7480 7481 if (fp->f_ci->m_fattr != old_fattr && 7482 test_share_config_flag(work->tcon->share_conf, 7483 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 7484 struct xattr_dos_attrib da; 7485 7486 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 7487 fp->filp->f_path.dentry, &da); 7488 if (ret <= 0) 7489 goto out; 7490 7491 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 7492 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 7493 fp->filp->f_path.dentry, &da); 7494 if (ret) 7495 fp->f_ci->m_fattr = old_fattr; 7496 } 7497 7498 out: 7499 ksmbd_fd_put(work, fp); 7500 return ret; 7501 } 7502 7503 static int fsctl_request_resume_key(struct ksmbd_work *work, 7504 struct smb2_ioctl_req *req, 7505 struct resume_key_ioctl_rsp *key_rsp) 7506 { 7507 struct ksmbd_file *fp; 7508 7509 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7510 if (!fp) 7511 return -ENOENT; 7512 7513 memset(key_rsp, 0, sizeof(*key_rsp)); 7514 key_rsp->ResumeKey[0] = req->VolatileFileId; 7515 key_rsp->ResumeKey[1] = req->PersistentFileId; 7516 ksmbd_fd_put(work, fp); 7517 7518 return 0; 7519 } 7520 7521 /** 7522 * smb2_ioctl() - handler for smb2 ioctl command 7523 * @work: smb work containing ioctl command buffer 7524 * 7525 * Return: 0 on success, otherwise error 7526 */ 7527 int smb2_ioctl(struct ksmbd_work *work) 7528 { 7529 struct smb2_ioctl_req *req; 7530 struct smb2_ioctl_rsp *rsp; 7531 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 7532 u64 id = KSMBD_NO_FID; 7533 struct ksmbd_conn *conn = work->conn; 7534 int ret = 0; 7535 7536 if (work->next_smb2_rcv_hdr_off) { 7537 req = ksmbd_req_buf_next(work); 7538 rsp = ksmbd_resp_buf_next(work); 7539 if (!has_file_id(req->VolatileFileId)) { 7540 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 7541 work->compound_fid); 7542 id = work->compound_fid; 7543 } 7544 } else { 7545 req = smb2_get_msg(work->request_buf); 7546 rsp = smb2_get_msg(work->response_buf); 7547 } 7548 7549 if (!has_file_id(id)) 7550 id = req->VolatileFileId; 7551 7552 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 7553 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7554 goto out; 7555 } 7556 7557 cnt_code = le32_to_cpu(req->CtlCode); 7558 ret = smb2_calc_max_out_buf_len(work, 48, 7559 le32_to_cpu(req->MaxOutputResponse)); 7560 if (ret < 0) { 7561 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7562 goto out; 7563 } 7564 out_buf_len = (unsigned int)ret; 7565 in_buf_len = le32_to_cpu(req->InputCount); 7566 7567 switch (cnt_code) { 7568 case FSCTL_DFS_GET_REFERRALS: 7569 case FSCTL_DFS_GET_REFERRALS_EX: 7570 /* Not support DFS yet */ 7571 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 7572 goto out; 7573 case FSCTL_CREATE_OR_GET_OBJECT_ID: 7574 { 7575 struct file_object_buf_type1_ioctl_rsp *obj_buf; 7576 7577 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 7578 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 7579 &rsp->Buffer[0]; 7580 7581 /* 7582 * TODO: This is dummy implementation to pass smbtorture 7583 * Need to check correct response later 7584 */ 7585 memset(obj_buf->ObjectId, 0x0, 16); 7586 memset(obj_buf->BirthVolumeId, 0x0, 16); 7587 memset(obj_buf->BirthObjectId, 0x0, 16); 7588 memset(obj_buf->DomainId, 0x0, 16); 7589 7590 break; 7591 } 7592 case FSCTL_PIPE_TRANSCEIVE: 7593 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 7594 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 7595 break; 7596 case FSCTL_VALIDATE_NEGOTIATE_INFO: 7597 if (conn->dialect < SMB30_PROT_ID) { 7598 ret = -EOPNOTSUPP; 7599 goto out; 7600 } 7601 7602 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 7603 Dialects)) { 7604 ret = -EINVAL; 7605 goto out; 7606 } 7607 7608 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 7609 ret = -EINVAL; 7610 goto out; 7611 } 7612 7613 ret = fsctl_validate_negotiate_info(conn, 7614 (struct validate_negotiate_info_req *)&req->Buffer[0], 7615 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 7616 in_buf_len); 7617 if (ret < 0) 7618 goto out; 7619 7620 nbytes = sizeof(struct validate_negotiate_info_rsp); 7621 rsp->PersistentFileId = SMB2_NO_FID; 7622 rsp->VolatileFileId = SMB2_NO_FID; 7623 break; 7624 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 7625 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 7626 if (ret < 0) 7627 goto out; 7628 nbytes = ret; 7629 break; 7630 case FSCTL_REQUEST_RESUME_KEY: 7631 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 7632 ret = -EINVAL; 7633 goto out; 7634 } 7635 7636 ret = fsctl_request_resume_key(work, req, 7637 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 7638 if (ret < 0) 7639 goto out; 7640 rsp->PersistentFileId = req->PersistentFileId; 7641 rsp->VolatileFileId = req->VolatileFileId; 7642 nbytes = sizeof(struct resume_key_ioctl_rsp); 7643 break; 7644 case FSCTL_COPYCHUNK: 7645 case FSCTL_COPYCHUNK_WRITE: 7646 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7647 ksmbd_debug(SMB, 7648 "User does not have write permission\n"); 7649 ret = -EACCES; 7650 goto out; 7651 } 7652 7653 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { 7654 ret = -EINVAL; 7655 goto out; 7656 } 7657 7658 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 7659 ret = -EINVAL; 7660 goto out; 7661 } 7662 7663 nbytes = sizeof(struct copychunk_ioctl_rsp); 7664 rsp->VolatileFileId = req->VolatileFileId; 7665 rsp->PersistentFileId = req->PersistentFileId; 7666 fsctl_copychunk(work, 7667 (struct copychunk_ioctl_req *)&req->Buffer[0], 7668 le32_to_cpu(req->CtlCode), 7669 le32_to_cpu(req->InputCount), 7670 req->VolatileFileId, 7671 req->PersistentFileId, 7672 rsp); 7673 break; 7674 case FSCTL_SET_SPARSE: 7675 if (in_buf_len < sizeof(struct file_sparse)) { 7676 ret = -EINVAL; 7677 goto out; 7678 } 7679 7680 ret = fsctl_set_sparse(work, id, 7681 (struct file_sparse *)&req->Buffer[0]); 7682 if (ret < 0) 7683 goto out; 7684 break; 7685 case FSCTL_SET_ZERO_DATA: 7686 { 7687 struct file_zero_data_information *zero_data; 7688 struct ksmbd_file *fp; 7689 loff_t off, len, bfz; 7690 7691 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7692 ksmbd_debug(SMB, 7693 "User does not have write permission\n"); 7694 ret = -EACCES; 7695 goto out; 7696 } 7697 7698 if (in_buf_len < sizeof(struct file_zero_data_information)) { 7699 ret = -EINVAL; 7700 goto out; 7701 } 7702 7703 zero_data = 7704 (struct file_zero_data_information *)&req->Buffer[0]; 7705 7706 off = le64_to_cpu(zero_data->FileOffset); 7707 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 7708 if (off < 0 || bfz < 0 || off > bfz) { 7709 ret = -EINVAL; 7710 goto out; 7711 } 7712 7713 len = bfz - off; 7714 if (len) { 7715 fp = ksmbd_lookup_fd_fast(work, id); 7716 if (!fp) { 7717 ret = -ENOENT; 7718 goto out; 7719 } 7720 7721 ret = ksmbd_vfs_zero_data(work, fp, off, len); 7722 ksmbd_fd_put(work, fp); 7723 if (ret < 0) 7724 goto out; 7725 } 7726 break; 7727 } 7728 case FSCTL_QUERY_ALLOCATED_RANGES: 7729 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 7730 ret = -EINVAL; 7731 goto out; 7732 } 7733 7734 ret = fsctl_query_allocated_ranges(work, id, 7735 (struct file_allocated_range_buffer *)&req->Buffer[0], 7736 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 7737 out_buf_len / 7738 sizeof(struct file_allocated_range_buffer), &nbytes); 7739 if (ret == -E2BIG) { 7740 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7741 } else if (ret < 0) { 7742 nbytes = 0; 7743 goto out; 7744 } 7745 7746 nbytes *= sizeof(struct file_allocated_range_buffer); 7747 break; 7748 case FSCTL_GET_REPARSE_POINT: 7749 { 7750 struct reparse_data_buffer *reparse_ptr; 7751 struct ksmbd_file *fp; 7752 7753 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 7754 fp = ksmbd_lookup_fd_fast(work, id); 7755 if (!fp) { 7756 pr_err("not found fp!!\n"); 7757 ret = -ENOENT; 7758 goto out; 7759 } 7760 7761 reparse_ptr->ReparseTag = 7762 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 7763 reparse_ptr->ReparseDataLength = 0; 7764 ksmbd_fd_put(work, fp); 7765 nbytes = sizeof(struct reparse_data_buffer); 7766 break; 7767 } 7768 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 7769 { 7770 struct ksmbd_file *fp_in, *fp_out = NULL; 7771 struct duplicate_extents_to_file *dup_ext; 7772 loff_t src_off, dst_off, length, cloned; 7773 7774 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 7775 ret = -EINVAL; 7776 goto out; 7777 } 7778 7779 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0]; 7780 7781 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 7782 dup_ext->PersistentFileHandle); 7783 if (!fp_in) { 7784 pr_err("not found file handle in duplicate extent to file\n"); 7785 ret = -ENOENT; 7786 goto out; 7787 } 7788 7789 fp_out = ksmbd_lookup_fd_fast(work, id); 7790 if (!fp_out) { 7791 pr_err("not found fp\n"); 7792 ret = -ENOENT; 7793 goto dup_ext_out; 7794 } 7795 7796 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 7797 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 7798 length = le64_to_cpu(dup_ext->ByteCount); 7799 /* 7800 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 7801 * should fall back to vfs_copy_file_range(). This could be 7802 * beneficial when re-exporting nfs/smb mount, but note that 7803 * this can result in partial copy that returns an error status. 7804 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 7805 * fall back to vfs_copy_file_range(), should be avoided when 7806 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 7807 */ 7808 cloned = vfs_clone_file_range(fp_in->filp, src_off, 7809 fp_out->filp, dst_off, length, 0); 7810 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 7811 ret = -EOPNOTSUPP; 7812 goto dup_ext_out; 7813 } else if (cloned != length) { 7814 cloned = vfs_copy_file_range(fp_in->filp, src_off, 7815 fp_out->filp, dst_off, 7816 length, 0); 7817 if (cloned != length) { 7818 if (cloned < 0) 7819 ret = cloned; 7820 else 7821 ret = -EINVAL; 7822 } 7823 } 7824 7825 dup_ext_out: 7826 ksmbd_fd_put(work, fp_in); 7827 ksmbd_fd_put(work, fp_out); 7828 if (ret < 0) 7829 goto out; 7830 break; 7831 } 7832 default: 7833 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 7834 cnt_code); 7835 ret = -EOPNOTSUPP; 7836 goto out; 7837 } 7838 7839 rsp->CtlCode = cpu_to_le32(cnt_code); 7840 rsp->InputCount = cpu_to_le32(0); 7841 rsp->InputOffset = cpu_to_le32(112); 7842 rsp->OutputOffset = cpu_to_le32(112); 7843 rsp->OutputCount = cpu_to_le32(nbytes); 7844 rsp->StructureSize = cpu_to_le16(49); 7845 rsp->Reserved = cpu_to_le16(0); 7846 rsp->Flags = cpu_to_le32(0); 7847 rsp->Reserved2 = cpu_to_le32(0); 7848 inc_rfc1001_len(work->response_buf, 48 + nbytes); 7849 7850 return 0; 7851 7852 out: 7853 if (ret == -EACCES) 7854 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7855 else if (ret == -ENOENT) 7856 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7857 else if (ret == -EOPNOTSUPP) 7858 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7859 else if (ret == -ENOSPC) 7860 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 7861 else if (ret < 0 || rsp->hdr.Status == 0) 7862 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7863 smb2_set_err_rsp(work); 7864 return 0; 7865 } 7866 7867 /** 7868 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 7869 * @work: smb work containing oplock break command buffer 7870 * 7871 * Return: 0 7872 */ 7873 static void smb20_oplock_break_ack(struct ksmbd_work *work) 7874 { 7875 struct smb2_oplock_break *req = smb2_get_msg(work->request_buf); 7876 struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf); 7877 struct ksmbd_file *fp; 7878 struct oplock_info *opinfo = NULL; 7879 __le32 err = 0; 7880 int ret = 0; 7881 u64 volatile_id, persistent_id; 7882 char req_oplevel = 0, rsp_oplevel = 0; 7883 unsigned int oplock_change_type; 7884 7885 volatile_id = req->VolatileFid; 7886 persistent_id = req->PersistentFid; 7887 req_oplevel = req->OplockLevel; 7888 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 7889 volatile_id, persistent_id, req_oplevel); 7890 7891 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7892 if (!fp) { 7893 rsp->hdr.Status = STATUS_FILE_CLOSED; 7894 smb2_set_err_rsp(work); 7895 return; 7896 } 7897 7898 opinfo = opinfo_get(fp); 7899 if (!opinfo) { 7900 pr_err("unexpected null oplock_info\n"); 7901 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 7902 smb2_set_err_rsp(work); 7903 ksmbd_fd_put(work, fp); 7904 return; 7905 } 7906 7907 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 7908 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 7909 goto err_out; 7910 } 7911 7912 if (opinfo->op_state == OPLOCK_STATE_NONE) { 7913 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 7914 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 7915 goto err_out; 7916 } 7917 7918 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 7919 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 7920 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 7921 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 7922 err = STATUS_INVALID_OPLOCK_PROTOCOL; 7923 oplock_change_type = OPLOCK_WRITE_TO_NONE; 7924 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 7925 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 7926 err = STATUS_INVALID_OPLOCK_PROTOCOL; 7927 oplock_change_type = OPLOCK_READ_TO_NONE; 7928 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 7929 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 7930 err = STATUS_INVALID_DEVICE_STATE; 7931 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 7932 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 7933 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 7934 oplock_change_type = OPLOCK_WRITE_TO_READ; 7935 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 7936 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 7937 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 7938 oplock_change_type = OPLOCK_WRITE_TO_NONE; 7939 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 7940 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 7941 oplock_change_type = OPLOCK_READ_TO_NONE; 7942 } else { 7943 oplock_change_type = 0; 7944 } 7945 } else { 7946 oplock_change_type = 0; 7947 } 7948 7949 switch (oplock_change_type) { 7950 case OPLOCK_WRITE_TO_READ: 7951 ret = opinfo_write_to_read(opinfo); 7952 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 7953 break; 7954 case OPLOCK_WRITE_TO_NONE: 7955 ret = opinfo_write_to_none(opinfo); 7956 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 7957 break; 7958 case OPLOCK_READ_TO_NONE: 7959 ret = opinfo_read_to_none(opinfo); 7960 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 7961 break; 7962 default: 7963 pr_err("unknown oplock change 0x%x -> 0x%x\n", 7964 opinfo->level, rsp_oplevel); 7965 } 7966 7967 if (ret < 0) { 7968 rsp->hdr.Status = err; 7969 goto err_out; 7970 } 7971 7972 opinfo_put(opinfo); 7973 ksmbd_fd_put(work, fp); 7974 opinfo->op_state = OPLOCK_STATE_NONE; 7975 wake_up_interruptible_all(&opinfo->oplock_q); 7976 7977 rsp->StructureSize = cpu_to_le16(24); 7978 rsp->OplockLevel = rsp_oplevel; 7979 rsp->Reserved = 0; 7980 rsp->Reserved2 = 0; 7981 rsp->VolatileFid = volatile_id; 7982 rsp->PersistentFid = persistent_id; 7983 inc_rfc1001_len(work->response_buf, 24); 7984 return; 7985 7986 err_out: 7987 opinfo->op_state = OPLOCK_STATE_NONE; 7988 wake_up_interruptible_all(&opinfo->oplock_q); 7989 7990 opinfo_put(opinfo); 7991 ksmbd_fd_put(work, fp); 7992 smb2_set_err_rsp(work); 7993 } 7994 7995 static int check_lease_state(struct lease *lease, __le32 req_state) 7996 { 7997 if ((lease->new_state == 7998 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 7999 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8000 lease->new_state = req_state; 8001 return 0; 8002 } 8003 8004 if (lease->new_state == req_state) 8005 return 0; 8006 8007 return 1; 8008 } 8009 8010 /** 8011 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8012 * @work: smb work containing lease break command buffer 8013 * 8014 * Return: 0 8015 */ 8016 static void smb21_lease_break_ack(struct ksmbd_work *work) 8017 { 8018 struct ksmbd_conn *conn = work->conn; 8019 struct smb2_lease_ack *req = smb2_get_msg(work->request_buf); 8020 struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf); 8021 struct oplock_info *opinfo; 8022 __le32 err = 0; 8023 int ret = 0; 8024 unsigned int lease_change_type; 8025 __le32 lease_state; 8026 struct lease *lease; 8027 8028 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8029 le32_to_cpu(req->LeaseState)); 8030 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8031 if (!opinfo) { 8032 ksmbd_debug(OPLOCK, "file not opened\n"); 8033 smb2_set_err_rsp(work); 8034 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8035 return; 8036 } 8037 lease = opinfo->o_lease; 8038 8039 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8040 pr_err("unexpected lease break state 0x%x\n", 8041 opinfo->op_state); 8042 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8043 goto err_out; 8044 } 8045 8046 if (check_lease_state(lease, req->LeaseState)) { 8047 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8048 ksmbd_debug(OPLOCK, 8049 "req lease state: 0x%x, expected state: 0x%x\n", 8050 req->LeaseState, lease->new_state); 8051 goto err_out; 8052 } 8053 8054 if (!atomic_read(&opinfo->breaking_cnt)) { 8055 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8056 goto err_out; 8057 } 8058 8059 /* check for bad lease state */ 8060 if (req->LeaseState & 8061 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8062 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8063 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8064 lease_change_type = OPLOCK_WRITE_TO_NONE; 8065 else 8066 lease_change_type = OPLOCK_READ_TO_NONE; 8067 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8068 le32_to_cpu(lease->state), 8069 le32_to_cpu(req->LeaseState)); 8070 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8071 req->LeaseState != SMB2_LEASE_NONE_LE) { 8072 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8073 lease_change_type = OPLOCK_READ_TO_NONE; 8074 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8075 le32_to_cpu(lease->state), 8076 le32_to_cpu(req->LeaseState)); 8077 } else { 8078 /* valid lease state changes */ 8079 err = STATUS_INVALID_DEVICE_STATE; 8080 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8081 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8082 lease_change_type = OPLOCK_WRITE_TO_NONE; 8083 else 8084 lease_change_type = OPLOCK_READ_TO_NONE; 8085 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8086 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8087 lease_change_type = OPLOCK_WRITE_TO_READ; 8088 else 8089 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8090 } else { 8091 lease_change_type = 0; 8092 } 8093 } 8094 8095 switch (lease_change_type) { 8096 case OPLOCK_WRITE_TO_READ: 8097 ret = opinfo_write_to_read(opinfo); 8098 break; 8099 case OPLOCK_READ_HANDLE_TO_READ: 8100 ret = opinfo_read_handle_to_read(opinfo); 8101 break; 8102 case OPLOCK_WRITE_TO_NONE: 8103 ret = opinfo_write_to_none(opinfo); 8104 break; 8105 case OPLOCK_READ_TO_NONE: 8106 ret = opinfo_read_to_none(opinfo); 8107 break; 8108 default: 8109 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8110 le32_to_cpu(lease->state), 8111 le32_to_cpu(req->LeaseState)); 8112 } 8113 8114 lease_state = lease->state; 8115 opinfo->op_state = OPLOCK_STATE_NONE; 8116 wake_up_interruptible_all(&opinfo->oplock_q); 8117 atomic_dec(&opinfo->breaking_cnt); 8118 wake_up_interruptible_all(&opinfo->oplock_brk); 8119 opinfo_put(opinfo); 8120 8121 if (ret < 0) { 8122 rsp->hdr.Status = err; 8123 goto err_out; 8124 } 8125 8126 rsp->StructureSize = cpu_to_le16(36); 8127 rsp->Reserved = 0; 8128 rsp->Flags = 0; 8129 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8130 rsp->LeaseState = lease_state; 8131 rsp->LeaseDuration = 0; 8132 inc_rfc1001_len(work->response_buf, 36); 8133 return; 8134 8135 err_out: 8136 opinfo->op_state = OPLOCK_STATE_NONE; 8137 wake_up_interruptible_all(&opinfo->oplock_q); 8138 atomic_dec(&opinfo->breaking_cnt); 8139 wake_up_interruptible_all(&opinfo->oplock_brk); 8140 8141 opinfo_put(opinfo); 8142 smb2_set_err_rsp(work); 8143 } 8144 8145 /** 8146 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8147 * @work: smb work containing oplock/lease break command buffer 8148 * 8149 * Return: 0 8150 */ 8151 int smb2_oplock_break(struct ksmbd_work *work) 8152 { 8153 struct smb2_oplock_break *req = smb2_get_msg(work->request_buf); 8154 struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf); 8155 8156 switch (le16_to_cpu(req->StructureSize)) { 8157 case OP_BREAK_STRUCT_SIZE_20: 8158 smb20_oplock_break_ack(work); 8159 break; 8160 case OP_BREAK_STRUCT_SIZE_21: 8161 smb21_lease_break_ack(work); 8162 break; 8163 default: 8164 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8165 le16_to_cpu(req->StructureSize)); 8166 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8167 smb2_set_err_rsp(work); 8168 } 8169 8170 return 0; 8171 } 8172 8173 /** 8174 * smb2_notify() - handler for smb2 notify request 8175 * @work: smb work containing notify command buffer 8176 * 8177 * Return: 0 8178 */ 8179 int smb2_notify(struct ksmbd_work *work) 8180 { 8181 struct smb2_change_notify_req *req; 8182 struct smb2_change_notify_rsp *rsp; 8183 8184 WORK_BUFFERS(work, req, rsp); 8185 8186 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8187 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8188 smb2_set_err_rsp(work); 8189 return 0; 8190 } 8191 8192 smb2_set_err_rsp(work); 8193 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8194 return 0; 8195 } 8196 8197 /** 8198 * smb2_is_sign_req() - handler for checking packet signing status 8199 * @work: smb work containing notify command buffer 8200 * @command: SMB2 command id 8201 * 8202 * Return: true if packed is signed, false otherwise 8203 */ 8204 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8205 { 8206 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); 8207 8208 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8209 command != SMB2_NEGOTIATE_HE && 8210 command != SMB2_SESSION_SETUP_HE && 8211 command != SMB2_OPLOCK_BREAK_HE) 8212 return true; 8213 8214 return false; 8215 } 8216 8217 /** 8218 * smb2_check_sign_req() - handler for req packet sign processing 8219 * @work: smb work containing notify command buffer 8220 * 8221 * Return: 1 on success, 0 otherwise 8222 */ 8223 int smb2_check_sign_req(struct ksmbd_work *work) 8224 { 8225 struct smb2_hdr *hdr; 8226 char signature_req[SMB2_SIGNATURE_SIZE]; 8227 char signature[SMB2_HMACSHA256_SIZE]; 8228 struct kvec iov[1]; 8229 size_t len; 8230 8231 hdr = smb2_get_msg(work->request_buf); 8232 if (work->next_smb2_rcv_hdr_off) 8233 hdr = ksmbd_req_buf_next(work); 8234 8235 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8236 len = get_rfc1002_len(work->request_buf); 8237 else if (hdr->NextCommand) 8238 len = le32_to_cpu(hdr->NextCommand); 8239 else 8240 len = get_rfc1002_len(work->request_buf) - 8241 work->next_smb2_rcv_hdr_off; 8242 8243 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8244 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8245 8246 iov[0].iov_base = (char *)&hdr->ProtocolId; 8247 iov[0].iov_len = len; 8248 8249 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8250 signature)) 8251 return 0; 8252 8253 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8254 pr_err("bad smb2 signature\n"); 8255 return 0; 8256 } 8257 8258 return 1; 8259 } 8260 8261 /** 8262 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8263 * @work: smb work containing notify command buffer 8264 * 8265 */ 8266 void smb2_set_sign_rsp(struct ksmbd_work *work) 8267 { 8268 struct smb2_hdr *hdr; 8269 struct smb2_hdr *req_hdr; 8270 char signature[SMB2_HMACSHA256_SIZE]; 8271 struct kvec iov[2]; 8272 size_t len; 8273 int n_vec = 1; 8274 8275 hdr = smb2_get_msg(work->response_buf); 8276 if (work->next_smb2_rsp_hdr_off) 8277 hdr = ksmbd_resp_buf_next(work); 8278 8279 req_hdr = ksmbd_req_buf_next(work); 8280 8281 if (!work->next_smb2_rsp_hdr_off) { 8282 len = get_rfc1002_len(work->response_buf); 8283 if (req_hdr->NextCommand) 8284 len = ALIGN(len, 8); 8285 } else { 8286 len = get_rfc1002_len(work->response_buf) - 8287 work->next_smb2_rsp_hdr_off; 8288 len = ALIGN(len, 8); 8289 } 8290 8291 if (req_hdr->NextCommand) 8292 hdr->NextCommand = cpu_to_le32(len); 8293 8294 hdr->Flags |= SMB2_FLAGS_SIGNED; 8295 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8296 8297 iov[0].iov_base = (char *)&hdr->ProtocolId; 8298 iov[0].iov_len = len; 8299 8300 if (work->aux_payload_sz) { 8301 iov[0].iov_len -= work->aux_payload_sz; 8302 8303 iov[1].iov_base = work->aux_payload_buf; 8304 iov[1].iov_len = work->aux_payload_sz; 8305 n_vec++; 8306 } 8307 8308 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8309 signature)) 8310 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8311 } 8312 8313 /** 8314 * smb3_check_sign_req() - handler for req packet sign processing 8315 * @work: smb work containing notify command buffer 8316 * 8317 * Return: 1 on success, 0 otherwise 8318 */ 8319 int smb3_check_sign_req(struct ksmbd_work *work) 8320 { 8321 struct ksmbd_conn *conn = work->conn; 8322 char *signing_key; 8323 struct smb2_hdr *hdr; 8324 struct channel *chann; 8325 char signature_req[SMB2_SIGNATURE_SIZE]; 8326 char signature[SMB2_CMACAES_SIZE]; 8327 struct kvec iov[1]; 8328 size_t len; 8329 8330 hdr = smb2_get_msg(work->request_buf); 8331 if (work->next_smb2_rcv_hdr_off) 8332 hdr = ksmbd_req_buf_next(work); 8333 8334 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8335 len = get_rfc1002_len(work->request_buf); 8336 else if (hdr->NextCommand) 8337 len = le32_to_cpu(hdr->NextCommand); 8338 else 8339 len = get_rfc1002_len(work->request_buf) - 8340 work->next_smb2_rcv_hdr_off; 8341 8342 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8343 signing_key = work->sess->smb3signingkey; 8344 } else { 8345 chann = lookup_chann_list(work->sess, conn); 8346 if (!chann) { 8347 return 0; 8348 } 8349 signing_key = chann->smb3signingkey; 8350 } 8351 8352 if (!signing_key) { 8353 pr_err("SMB3 signing key is not generated\n"); 8354 return 0; 8355 } 8356 8357 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8358 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8359 iov[0].iov_base = (char *)&hdr->ProtocolId; 8360 iov[0].iov_len = len; 8361 8362 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8363 return 0; 8364 8365 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8366 pr_err("bad smb2 signature\n"); 8367 return 0; 8368 } 8369 8370 return 1; 8371 } 8372 8373 /** 8374 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8375 * @work: smb work containing notify command buffer 8376 * 8377 */ 8378 void smb3_set_sign_rsp(struct ksmbd_work *work) 8379 { 8380 struct ksmbd_conn *conn = work->conn; 8381 struct smb2_hdr *req_hdr, *hdr; 8382 struct channel *chann; 8383 char signature[SMB2_CMACAES_SIZE]; 8384 struct kvec iov[2]; 8385 int n_vec = 1; 8386 size_t len; 8387 char *signing_key; 8388 8389 hdr = smb2_get_msg(work->response_buf); 8390 if (work->next_smb2_rsp_hdr_off) 8391 hdr = ksmbd_resp_buf_next(work); 8392 8393 req_hdr = ksmbd_req_buf_next(work); 8394 8395 if (!work->next_smb2_rsp_hdr_off) { 8396 len = get_rfc1002_len(work->response_buf); 8397 if (req_hdr->NextCommand) 8398 len = ALIGN(len, 8); 8399 } else { 8400 len = get_rfc1002_len(work->response_buf) - 8401 work->next_smb2_rsp_hdr_off; 8402 len = ALIGN(len, 8); 8403 } 8404 8405 if (conn->binding == false && 8406 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8407 signing_key = work->sess->smb3signingkey; 8408 } else { 8409 chann = lookup_chann_list(work->sess, work->conn); 8410 if (!chann) { 8411 return; 8412 } 8413 signing_key = chann->smb3signingkey; 8414 } 8415 8416 if (!signing_key) 8417 return; 8418 8419 if (req_hdr->NextCommand) 8420 hdr->NextCommand = cpu_to_le32(len); 8421 8422 hdr->Flags |= SMB2_FLAGS_SIGNED; 8423 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8424 iov[0].iov_base = (char *)&hdr->ProtocolId; 8425 iov[0].iov_len = len; 8426 if (work->aux_payload_sz) { 8427 iov[0].iov_len -= work->aux_payload_sz; 8428 iov[1].iov_base = work->aux_payload_buf; 8429 iov[1].iov_len = work->aux_payload_sz; 8430 n_vec++; 8431 } 8432 8433 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature)) 8434 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8435 } 8436 8437 /** 8438 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 8439 * @work: smb work containing response buffer 8440 * 8441 */ 8442 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 8443 { 8444 struct ksmbd_conn *conn = work->conn; 8445 struct ksmbd_session *sess = work->sess; 8446 struct smb2_hdr *req, *rsp; 8447 8448 if (conn->dialect != SMB311_PROT_ID) 8449 return; 8450 8451 WORK_BUFFERS(work, req, rsp); 8452 8453 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 8454 conn->preauth_info) 8455 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8456 conn->preauth_info->Preauth_HashValue); 8457 8458 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 8459 __u8 *hash_value; 8460 8461 if (conn->binding) { 8462 struct preauth_session *preauth_sess; 8463 8464 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 8465 if (!preauth_sess) 8466 return; 8467 hash_value = preauth_sess->Preauth_HashValue; 8468 } else { 8469 hash_value = sess->Preauth_HashValue; 8470 if (!hash_value) 8471 return; 8472 } 8473 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8474 hash_value); 8475 } 8476 } 8477 8478 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 8479 { 8480 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 8481 struct smb2_hdr *hdr = smb2_get_msg(old_buf); 8482 unsigned int orig_len = get_rfc1002_len(old_buf); 8483 8484 /* tr_buf must be cleared by the caller */ 8485 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 8486 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 8487 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 8488 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 8489 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 8490 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 8491 else 8492 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 8493 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 8494 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 8495 inc_rfc1001_len(tr_buf, orig_len); 8496 } 8497 8498 int smb3_encrypt_resp(struct ksmbd_work *work) 8499 { 8500 char *buf = work->response_buf; 8501 struct kvec iov[3]; 8502 int rc = -ENOMEM; 8503 int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0); 8504 8505 if (ARRAY_SIZE(iov) < rq_nvec) 8506 return -ENOMEM; 8507 8508 work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); 8509 if (!work->tr_buf) 8510 return rc; 8511 8512 /* fill transform header */ 8513 fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type); 8514 8515 iov[0].iov_base = work->tr_buf; 8516 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8517 buf_size += iov[0].iov_len - 4; 8518 8519 iov[1].iov_base = buf + 4; 8520 iov[1].iov_len = get_rfc1002_len(buf); 8521 if (work->aux_payload_sz) { 8522 iov[1].iov_len = work->resp_hdr_sz - 4; 8523 8524 iov[2].iov_base = work->aux_payload_buf; 8525 iov[2].iov_len = work->aux_payload_sz; 8526 buf_size += iov[2].iov_len; 8527 } 8528 buf_size += iov[1].iov_len; 8529 work->resp_hdr_sz = iov[1].iov_len; 8530 8531 rc = ksmbd_crypt_message(work, iov, rq_nvec, 1); 8532 if (rc) 8533 return rc; 8534 8535 memmove(buf, iov[1].iov_base, iov[1].iov_len); 8536 *(__be32 *)work->tr_buf = cpu_to_be32(buf_size); 8537 8538 return rc; 8539 } 8540 8541 bool smb3_is_transform_hdr(void *buf) 8542 { 8543 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); 8544 8545 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 8546 } 8547 8548 int smb3_decrypt_req(struct ksmbd_work *work) 8549 { 8550 struct ksmbd_session *sess; 8551 char *buf = work->request_buf; 8552 unsigned int pdu_length = get_rfc1002_len(buf); 8553 struct kvec iov[2]; 8554 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 8555 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); 8556 int rc = 0; 8557 8558 if (buf_data_size < sizeof(struct smb2_hdr)) { 8559 pr_err("Transform message is too small (%u)\n", 8560 pdu_length); 8561 return -ECONNABORTED; 8562 } 8563 8564 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 8565 pr_err("Transform message is broken\n"); 8566 return -ECONNABORTED; 8567 } 8568 8569 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 8570 if (!sess) { 8571 pr_err("invalid session id(%llx) in transform header\n", 8572 le64_to_cpu(tr_hdr->SessionId)); 8573 return -ECONNABORTED; 8574 } 8575 8576 iov[0].iov_base = buf; 8577 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8578 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 8579 iov[1].iov_len = buf_data_size; 8580 rc = ksmbd_crypt_message(work, iov, 2, 0); 8581 if (rc) 8582 return rc; 8583 8584 memmove(buf + 4, iov[1].iov_base, buf_data_size); 8585 *(__be32 *)buf = cpu_to_be32(buf_data_size); 8586 8587 return rc; 8588 } 8589 8590 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 8591 { 8592 struct ksmbd_conn *conn = work->conn; 8593 struct ksmbd_session *sess = work->sess; 8594 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); 8595 8596 if (conn->dialect < SMB30_PROT_ID) 8597 return false; 8598 8599 if (work->next_smb2_rcv_hdr_off) 8600 rsp = ksmbd_resp_buf_next(work); 8601 8602 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 8603 sess->user && !user_guest(sess->user) && 8604 rsp->Status == STATUS_SUCCESS) 8605 return true; 8606 return false; 8607 } 8608