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