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 = ksmbd_req_buf_next(work); 91 unsigned int cmd = le16_to_cpu(req_hdr->Command); 92 unsigned int tree_id; 93 94 if (cmd == SMB2_TREE_CONNECT_HE || 95 cmd == SMB2_CANCEL_HE || 96 cmd == SMB2_LOGOFF_HE) { 97 ksmbd_debug(SMB, "skip to check tree connect request\n"); 98 return 0; 99 } 100 101 if (xa_empty(&work->sess->tree_conns)) { 102 ksmbd_debug(SMB, "NO tree connected\n"); 103 return -ENOENT; 104 } 105 106 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 107 108 /* 109 * If request is not the first in Compound request, 110 * Just validate tree id in header with work->tcon->id. 111 */ 112 if (work->next_smb2_rcv_hdr_off) { 113 if (!work->tcon) { 114 pr_err("The first operation in the compound does not have tcon\n"); 115 return -EINVAL; 116 } 117 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 118 pr_err("tree id(%u) is different with id(%u) in first operation\n", 119 tree_id, work->tcon->id); 120 return -EINVAL; 121 } 122 return 1; 123 } 124 125 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 126 if (!work->tcon) { 127 pr_err("Invalid tid %d\n", tree_id); 128 return -ENOENT; 129 } 130 131 return 1; 132 } 133 134 /** 135 * smb2_set_err_rsp() - set error response code on smb response 136 * @work: smb work containing response buffer 137 */ 138 void smb2_set_err_rsp(struct ksmbd_work *work) 139 { 140 struct smb2_err_rsp *err_rsp; 141 142 if (work->next_smb2_rcv_hdr_off) 143 err_rsp = ksmbd_resp_buf_next(work); 144 else 145 err_rsp = smb2_get_msg(work->response_buf); 146 147 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 148 int err; 149 150 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 151 err_rsp->ErrorContextCount = 0; 152 err_rsp->Reserved = 0; 153 err_rsp->ByteCount = 0; 154 err_rsp->ErrorData[0] = 0; 155 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, 156 __SMB2_HEADER_STRUCTURE_SIZE + 157 SMB2_ERROR_STRUCTURE_SIZE2); 158 if (err) 159 work->send_no_response = 1; 160 } 161 } 162 163 /** 164 * is_smb2_neg_cmd() - is it smb2 negotiation command 165 * @work: smb work containing smb header 166 * 167 * Return: true if smb2 negotiation command, otherwise false 168 */ 169 bool is_smb2_neg_cmd(struct ksmbd_work *work) 170 { 171 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 172 173 /* is it SMB2 header ? */ 174 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 175 return false; 176 177 /* make sure it is request not response message */ 178 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 179 return false; 180 181 if (hdr->Command != SMB2_NEGOTIATE) 182 return false; 183 184 return true; 185 } 186 187 /** 188 * is_smb2_rsp() - is it smb2 response 189 * @work: smb work containing smb response buffer 190 * 191 * Return: true if smb2 response, otherwise false 192 */ 193 bool is_smb2_rsp(struct ksmbd_work *work) 194 { 195 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); 196 197 /* is it SMB2 header ? */ 198 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 199 return false; 200 201 /* make sure it is response not request message */ 202 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 203 return false; 204 205 return true; 206 } 207 208 /** 209 * get_smb2_cmd_val() - get smb command code from smb header 210 * @work: smb work containing smb request buffer 211 * 212 * Return: smb2 request command value 213 */ 214 u16 get_smb2_cmd_val(struct ksmbd_work *work) 215 { 216 struct smb2_hdr *rcv_hdr; 217 218 if (work->next_smb2_rcv_hdr_off) 219 rcv_hdr = ksmbd_req_buf_next(work); 220 else 221 rcv_hdr = smb2_get_msg(work->request_buf); 222 return le16_to_cpu(rcv_hdr->Command); 223 } 224 225 /** 226 * set_smb2_rsp_status() - set error response code on smb2 header 227 * @work: smb work containing response buffer 228 * @err: error response code 229 */ 230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 231 { 232 struct smb2_hdr *rsp_hdr; 233 234 rsp_hdr = smb2_get_msg(work->response_buf); 235 rsp_hdr->Status = err; 236 237 work->iov_idx = 0; 238 work->iov_cnt = 0; 239 work->next_smb2_rcv_hdr_off = 0; 240 smb2_set_err_rsp(work); 241 } 242 243 /** 244 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 245 * @work: smb work containing smb request buffer 246 * 247 * smb2 negotiate response is sent in reply of smb1 negotiate command for 248 * dialect auto-negotiation. 249 */ 250 int init_smb2_neg_rsp(struct ksmbd_work *work) 251 { 252 struct smb2_hdr *rsp_hdr; 253 struct smb2_negotiate_rsp *rsp; 254 struct ksmbd_conn *conn = work->conn; 255 int err; 256 257 rsp_hdr = smb2_get_msg(work->response_buf); 258 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 259 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 260 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 261 rsp_hdr->CreditRequest = cpu_to_le16(2); 262 rsp_hdr->Command = SMB2_NEGOTIATE; 263 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 264 rsp_hdr->NextCommand = 0; 265 rsp_hdr->MessageId = 0; 266 rsp_hdr->Id.SyncId.ProcessId = 0; 267 rsp_hdr->Id.SyncId.TreeId = 0; 268 rsp_hdr->SessionId = 0; 269 memset(rsp_hdr->Signature, 0, 16); 270 271 rsp = smb2_get_msg(work->response_buf); 272 273 WARN_ON(ksmbd_conn_good(conn)); 274 275 rsp->StructureSize = cpu_to_le16(65); 276 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 277 rsp->DialectRevision = cpu_to_le16(conn->dialect); 278 /* Not setting conn guid rsp->ServerGUID, as it 279 * not used by client for identifying connection 280 */ 281 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 282 /* Default Max Message Size till SMB2.0, 64K*/ 283 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 284 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 285 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 286 287 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 288 rsp->ServerStartTime = 0; 289 290 rsp->SecurityBufferOffset = cpu_to_le16(128); 291 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 292 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 293 le16_to_cpu(rsp->SecurityBufferOffset)); 294 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 295 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 296 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 297 err = ksmbd_iov_pin_rsp(work, rsp, 298 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); 299 if (err) 300 return err; 301 conn->use_spnego = true; 302 303 ksmbd_conn_set_need_negotiate(conn); 304 return 0; 305 } 306 307 /** 308 * smb2_set_rsp_credits() - set number of credits in response buffer 309 * @work: smb work containing smb response buffer 310 */ 311 int smb2_set_rsp_credits(struct ksmbd_work *work) 312 { 313 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 314 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 315 struct ksmbd_conn *conn = work->conn; 316 unsigned short credits_requested, aux_max; 317 unsigned short credit_charge, credits_granted = 0; 318 319 if (work->send_no_response) 320 return 0; 321 322 hdr->CreditCharge = req_hdr->CreditCharge; 323 324 if (conn->total_credits > conn->vals->max_credits) { 325 hdr->CreditRequest = 0; 326 pr_err("Total credits overflow: %d\n", conn->total_credits); 327 return -EINVAL; 328 } 329 330 credit_charge = max_t(unsigned short, 331 le16_to_cpu(req_hdr->CreditCharge), 1); 332 if (credit_charge > conn->total_credits) { 333 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 334 credit_charge, conn->total_credits); 335 return -EINVAL; 336 } 337 338 conn->total_credits -= credit_charge; 339 conn->outstanding_credits -= credit_charge; 340 credits_requested = max_t(unsigned short, 341 le16_to_cpu(req_hdr->CreditRequest), 1); 342 343 /* according to smb2.credits smbtorture, Windows server 344 * 2016 or later grant up to 8192 credits at once. 345 * 346 * TODO: Need to adjuct CreditRequest value according to 347 * current cpu load 348 */ 349 if (hdr->Command == SMB2_NEGOTIATE) 350 aux_max = 1; 351 else 352 aux_max = conn->vals->max_credits - conn->total_credits; 353 credits_granted = min_t(unsigned short, credits_requested, aux_max); 354 355 conn->total_credits += credits_granted; 356 work->credits_granted += credits_granted; 357 358 if (!req_hdr->NextCommand) { 359 /* Update CreditRequest in last request */ 360 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 361 } 362 ksmbd_debug(SMB, 363 "credits: requested[%d] granted[%d] total_granted[%d]\n", 364 credits_requested, credits_granted, 365 conn->total_credits); 366 return 0; 367 } 368 369 /** 370 * init_chained_smb2_rsp() - initialize smb2 chained response 371 * @work: smb work containing smb response buffer 372 */ 373 static void init_chained_smb2_rsp(struct ksmbd_work *work) 374 { 375 struct smb2_hdr *req = ksmbd_req_buf_next(work); 376 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 377 struct smb2_hdr *rsp_hdr; 378 struct smb2_hdr *rcv_hdr; 379 int next_hdr_offset = 0; 380 int len, new_len; 381 382 /* Len of this response = updated RFC len - offset of previous cmd 383 * in the compound rsp 384 */ 385 386 /* Storing the current local FID which may be needed by subsequent 387 * command in the compound request 388 */ 389 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 390 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 391 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 392 work->compound_sid = le64_to_cpu(rsp->SessionId); 393 } 394 395 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 396 next_hdr_offset = le32_to_cpu(req->NextCommand); 397 398 new_len = ALIGN(len, 8); 399 work->iov[work->iov_idx].iov_len += (new_len - len); 400 inc_rfc1001_len(work->response_buf, new_len - len); 401 rsp->NextCommand = cpu_to_le32(new_len); 402 403 work->next_smb2_rcv_hdr_off += next_hdr_offset; 404 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 405 work->next_smb2_rsp_hdr_off += new_len; 406 ksmbd_debug(SMB, 407 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 408 new_len, work->next_smb2_rcv_hdr_off, 409 work->next_smb2_rsp_hdr_off); 410 411 rsp_hdr = ksmbd_resp_buf_next(work); 412 rcv_hdr = ksmbd_req_buf_next(work); 413 414 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 415 ksmbd_debug(SMB, "related flag should be set\n"); 416 work->compound_fid = KSMBD_NO_FID; 417 work->compound_pfid = KSMBD_NO_FID; 418 } 419 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 420 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 421 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 422 rsp_hdr->Command = rcv_hdr->Command; 423 424 /* 425 * Message is response. We don't grant oplock yet. 426 */ 427 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 428 SMB2_FLAGS_RELATED_OPERATIONS); 429 rsp_hdr->NextCommand = 0; 430 rsp_hdr->MessageId = rcv_hdr->MessageId; 431 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 432 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 433 rsp_hdr->SessionId = rcv_hdr->SessionId; 434 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 435 } 436 437 /** 438 * is_chained_smb2_message() - check for chained command 439 * @work: smb work containing smb request buffer 440 * 441 * Return: true if chained request, otherwise false 442 */ 443 bool is_chained_smb2_message(struct ksmbd_work *work) 444 { 445 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 446 unsigned int len, next_cmd; 447 448 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 449 return false; 450 451 hdr = ksmbd_req_buf_next(work); 452 next_cmd = le32_to_cpu(hdr->NextCommand); 453 if (next_cmd > 0) { 454 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 455 __SMB2_HEADER_STRUCTURE_SIZE > 456 get_rfc1002_len(work->request_buf)) { 457 pr_err("next command(%u) offset exceeds smb msg size\n", 458 next_cmd); 459 return false; 460 } 461 462 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 463 work->response_sz) { 464 pr_err("next response offset exceeds response buffer size\n"); 465 return false; 466 } 467 468 ksmbd_debug(SMB, "got SMB2 chained command\n"); 469 init_chained_smb2_rsp(work); 470 return true; 471 } else if (work->next_smb2_rcv_hdr_off) { 472 /* 473 * This is last request in chained command, 474 * align response to 8 byte 475 */ 476 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 477 len = len - get_rfc1002_len(work->response_buf); 478 if (len) { 479 ksmbd_debug(SMB, "padding len %u\n", len); 480 work->iov[work->iov_idx].iov_len += len; 481 inc_rfc1001_len(work->response_buf, len); 482 } 483 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 484 } 485 return false; 486 } 487 488 /** 489 * init_smb2_rsp_hdr() - initialize smb2 response 490 * @work: smb work containing smb request buffer 491 * 492 * Return: 0 493 */ 494 int init_smb2_rsp_hdr(struct ksmbd_work *work) 495 { 496 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); 497 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); 498 499 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 500 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 501 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 502 rsp_hdr->Command = rcv_hdr->Command; 503 504 /* 505 * Message is response. We don't grant oplock yet. 506 */ 507 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 508 rsp_hdr->NextCommand = 0; 509 rsp_hdr->MessageId = rcv_hdr->MessageId; 510 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 511 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 512 rsp_hdr->SessionId = rcv_hdr->SessionId; 513 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 514 515 return 0; 516 } 517 518 /** 519 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 520 * @work: smb work containing smb request buffer 521 * 522 * Return: 0 on success, otherwise error 523 */ 524 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 525 { 526 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 527 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 528 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 529 size_t sz = small_sz; 530 int cmd = le16_to_cpu(hdr->Command); 531 532 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 533 sz = large_sz; 534 535 if (cmd == SMB2_QUERY_INFO_HE) { 536 struct smb2_query_info_req *req; 537 538 if (get_rfc1002_len(work->request_buf) < 539 offsetof(struct smb2_query_info_req, OutputBufferLength)) 540 return -EINVAL; 541 542 req = smb2_get_msg(work->request_buf); 543 if ((req->InfoType == SMB2_O_INFO_FILE && 544 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 545 req->FileInfoClass == FILE_ALL_INFORMATION)) || 546 req->InfoType == SMB2_O_INFO_SECURITY) 547 sz = large_sz; 548 } 549 550 /* allocate large response buf for chained commands */ 551 if (le32_to_cpu(hdr->NextCommand) > 0) 552 sz = large_sz; 553 554 work->response_buf = kvzalloc(sz, GFP_KERNEL); 555 if (!work->response_buf) 556 return -ENOMEM; 557 558 work->response_sz = sz; 559 return 0; 560 } 561 562 /** 563 * smb2_check_user_session() - check for valid session for a user 564 * @work: smb work containing smb request buffer 565 * 566 * Return: 0 on success, otherwise error 567 */ 568 int smb2_check_user_session(struct ksmbd_work *work) 569 { 570 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 571 struct ksmbd_conn *conn = work->conn; 572 unsigned int cmd = le16_to_cpu(req_hdr->Command); 573 unsigned long long sess_id; 574 575 /* 576 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 577 * require a session id, so no need to validate user session's for 578 * these commands. 579 */ 580 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 581 cmd == SMB2_SESSION_SETUP_HE) 582 return 0; 583 584 if (!ksmbd_conn_good(conn)) 585 return -EIO; 586 587 sess_id = le64_to_cpu(req_hdr->SessionId); 588 589 /* 590 * If request is not the first in Compound request, 591 * Just validate session id in header with work->sess->id. 592 */ 593 if (work->next_smb2_rcv_hdr_off) { 594 if (!work->sess) { 595 pr_err("The first operation in the compound does not have sess\n"); 596 return -EINVAL; 597 } 598 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 599 pr_err("session id(%llu) is different with the first operation(%lld)\n", 600 sess_id, work->sess->id); 601 return -EINVAL; 602 } 603 return 1; 604 } 605 606 /* Check for validity of user session */ 607 work->sess = ksmbd_session_lookup_all(conn, sess_id); 608 if (work->sess) 609 return 1; 610 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 611 return -ENOENT; 612 } 613 614 /** 615 * smb2_get_name() - get filename string from on the wire smb format 616 * @src: source buffer 617 * @maxlen: maxlen of source string 618 * @local_nls: nls_table pointer 619 * 620 * Return: matching converted filename on success, otherwise error ptr 621 */ 622 static char * 623 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 624 { 625 char *name; 626 627 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 628 if (IS_ERR(name)) { 629 pr_err("failed to get name %ld\n", PTR_ERR(name)); 630 return name; 631 } 632 633 if (*name == '\\') { 634 pr_err("not allow directory name included leading slash\n"); 635 kfree(name); 636 return ERR_PTR(-EINVAL); 637 } 638 639 ksmbd_conv_path_to_unix(name); 640 ksmbd_strip_last_slash(name); 641 return name; 642 } 643 644 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 645 { 646 struct ksmbd_conn *conn = work->conn; 647 int id; 648 649 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 650 if (id < 0) { 651 pr_err("Failed to alloc async message id\n"); 652 return id; 653 } 654 work->asynchronous = true; 655 work->async_id = id; 656 657 ksmbd_debug(SMB, 658 "Send interim Response to inform async request id : %d\n", 659 work->async_id); 660 661 work->cancel_fn = fn; 662 work->cancel_argv = arg; 663 664 if (list_empty(&work->async_request_entry)) { 665 spin_lock(&conn->request_lock); 666 list_add_tail(&work->async_request_entry, &conn->async_requests); 667 spin_unlock(&conn->request_lock); 668 } 669 670 return 0; 671 } 672 673 void release_async_work(struct ksmbd_work *work) 674 { 675 struct ksmbd_conn *conn = work->conn; 676 677 spin_lock(&conn->request_lock); 678 list_del_init(&work->async_request_entry); 679 spin_unlock(&conn->request_lock); 680 681 work->asynchronous = 0; 682 work->cancel_fn = NULL; 683 kfree(work->cancel_argv); 684 work->cancel_argv = NULL; 685 if (work->async_id) { 686 ksmbd_release_id(&conn->async_ida, work->async_id); 687 work->async_id = 0; 688 } 689 } 690 691 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 692 { 693 struct smb2_hdr *rsp_hdr; 694 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 695 696 if (allocate_interim_rsp_buf(in_work)) { 697 pr_err("smb_allocate_rsp_buf failed!\n"); 698 ksmbd_free_work_struct(in_work); 699 return; 700 } 701 702 in_work->conn = work->conn; 703 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 704 __SMB2_HEADER_STRUCTURE_SIZE); 705 706 rsp_hdr = smb2_get_msg(in_work->response_buf); 707 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 708 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); 709 smb2_set_err_rsp(in_work); 710 rsp_hdr->Status = status; 711 712 ksmbd_conn_write(in_work); 713 ksmbd_free_work_struct(in_work); 714 } 715 716 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 717 { 718 if (S_ISDIR(mode) || S_ISREG(mode)) 719 return 0; 720 721 if (S_ISLNK(mode)) 722 return IO_REPARSE_TAG_LX_SYMLINK_LE; 723 else if (S_ISFIFO(mode)) 724 return IO_REPARSE_TAG_LX_FIFO_LE; 725 else if (S_ISSOCK(mode)) 726 return IO_REPARSE_TAG_AF_UNIX_LE; 727 else if (S_ISCHR(mode)) 728 return IO_REPARSE_TAG_LX_CHR_LE; 729 else if (S_ISBLK(mode)) 730 return IO_REPARSE_TAG_LX_BLK_LE; 731 732 return 0; 733 } 734 735 /** 736 * smb2_get_dos_mode() - get file mode in dos format from unix mode 737 * @stat: kstat containing file mode 738 * @attribute: attribute flags 739 * 740 * Return: converted dos mode 741 */ 742 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 743 { 744 int attr = 0; 745 746 if (S_ISDIR(stat->mode)) { 747 attr = FILE_ATTRIBUTE_DIRECTORY | 748 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 749 } else { 750 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 751 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 752 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 753 FILE_SUPPORTS_SPARSE_FILES)) 754 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 755 756 if (smb2_get_reparse_tag_special_file(stat->mode)) 757 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 758 } 759 760 return attr; 761 } 762 763 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 764 __le16 hash_id) 765 { 766 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 767 pneg_ctxt->DataLength = cpu_to_le16(38); 768 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 769 pneg_ctxt->Reserved = cpu_to_le32(0); 770 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 771 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 772 pneg_ctxt->HashAlgorithms = hash_id; 773 } 774 775 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 776 __le16 cipher_type) 777 { 778 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 779 pneg_ctxt->DataLength = cpu_to_le16(4); 780 pneg_ctxt->Reserved = cpu_to_le32(0); 781 pneg_ctxt->CipherCount = cpu_to_le16(1); 782 pneg_ctxt->Ciphers[0] = cipher_type; 783 } 784 785 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 786 __le16 sign_algo) 787 { 788 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 789 pneg_ctxt->DataLength = 790 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 791 - sizeof(struct smb2_neg_context)); 792 pneg_ctxt->Reserved = cpu_to_le32(0); 793 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 794 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 795 } 796 797 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 798 { 799 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 800 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 801 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 802 pneg_ctxt->Name[0] = 0x93; 803 pneg_ctxt->Name[1] = 0xAD; 804 pneg_ctxt->Name[2] = 0x25; 805 pneg_ctxt->Name[3] = 0x50; 806 pneg_ctxt->Name[4] = 0x9C; 807 pneg_ctxt->Name[5] = 0xB4; 808 pneg_ctxt->Name[6] = 0x11; 809 pneg_ctxt->Name[7] = 0xE7; 810 pneg_ctxt->Name[8] = 0xB4; 811 pneg_ctxt->Name[9] = 0x23; 812 pneg_ctxt->Name[10] = 0x83; 813 pneg_ctxt->Name[11] = 0xDE; 814 pneg_ctxt->Name[12] = 0x96; 815 pneg_ctxt->Name[13] = 0x8B; 816 pneg_ctxt->Name[14] = 0xCD; 817 pneg_ctxt->Name[15] = 0x7C; 818 } 819 820 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 821 struct smb2_negotiate_rsp *rsp) 822 { 823 char * const pneg_ctxt = (char *)rsp + 824 le32_to_cpu(rsp->NegotiateContextOffset); 825 int neg_ctxt_cnt = 1; 826 int ctxt_size; 827 828 ksmbd_debug(SMB, 829 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 830 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 831 conn->preauth_info->Preauth_HashId); 832 ctxt_size = sizeof(struct smb2_preauth_neg_context); 833 834 if (conn->cipher_type) { 835 /* Round to 8 byte boundary */ 836 ctxt_size = round_up(ctxt_size, 8); 837 ksmbd_debug(SMB, 838 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 839 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 840 (pneg_ctxt + ctxt_size), 841 conn->cipher_type); 842 neg_ctxt_cnt++; 843 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 844 } 845 846 /* compression context not yet supported */ 847 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 848 849 if (conn->posix_ext_supported) { 850 ctxt_size = round_up(ctxt_size, 8); 851 ksmbd_debug(SMB, 852 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 853 build_posix_ctxt((struct smb2_posix_neg_context *) 854 (pneg_ctxt + ctxt_size)); 855 neg_ctxt_cnt++; 856 ctxt_size += sizeof(struct smb2_posix_neg_context); 857 } 858 859 if (conn->signing_negotiated) { 860 ctxt_size = round_up(ctxt_size, 8); 861 ksmbd_debug(SMB, 862 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 863 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 864 (pneg_ctxt + ctxt_size), 865 conn->signing_algorithm); 866 neg_ctxt_cnt++; 867 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 868 } 869 870 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 871 return ctxt_size + AUTH_GSS_PADDING; 872 } 873 874 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 875 struct smb2_preauth_neg_context *pneg_ctxt, 876 int ctxt_len) 877 { 878 /* 879 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 880 * which may not be present. Only check for used HashAlgorithms[1]. 881 */ 882 if (ctxt_len < 883 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 884 return STATUS_INVALID_PARAMETER; 885 886 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 887 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 888 889 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 890 return STATUS_SUCCESS; 891 } 892 893 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 894 struct smb2_encryption_neg_context *pneg_ctxt, 895 int ctxt_len) 896 { 897 int cph_cnt; 898 int i, cphs_size; 899 900 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 901 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 902 return; 903 } 904 905 conn->cipher_type = 0; 906 907 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 908 cphs_size = cph_cnt * sizeof(__le16); 909 910 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 911 ctxt_len) { 912 pr_err("Invalid cipher count(%d)\n", cph_cnt); 913 return; 914 } 915 916 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 917 return; 918 919 for (i = 0; i < cph_cnt; i++) { 920 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 921 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 922 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 923 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 924 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 925 pneg_ctxt->Ciphers[i]); 926 conn->cipher_type = pneg_ctxt->Ciphers[i]; 927 break; 928 } 929 } 930 } 931 932 /** 933 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 934 * @conn: smb connection 935 * 936 * Return: true if connection should be encrypted, else false 937 */ 938 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 939 { 940 if (!conn->ops->generate_encryptionkey) 941 return false; 942 943 /* 944 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 945 * SMB 3.1.1 uses the cipher_type field. 946 */ 947 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 948 conn->cipher_type; 949 } 950 951 static void decode_compress_ctxt(struct ksmbd_conn *conn, 952 struct smb2_compression_capabilities_context *pneg_ctxt) 953 { 954 conn->compress_algorithm = SMB3_COMPRESS_NONE; 955 } 956 957 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 958 struct smb2_signing_capabilities *pneg_ctxt, 959 int ctxt_len) 960 { 961 int sign_algo_cnt; 962 int i, sign_alos_size; 963 964 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 965 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 966 return; 967 } 968 969 conn->signing_negotiated = false; 970 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 971 sign_alos_size = sign_algo_cnt * sizeof(__le16); 972 973 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 974 ctxt_len) { 975 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 976 return; 977 } 978 979 for (i = 0; i < sign_algo_cnt; i++) { 980 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 981 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 982 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 983 pneg_ctxt->SigningAlgorithms[i]); 984 conn->signing_negotiated = true; 985 conn->signing_algorithm = 986 pneg_ctxt->SigningAlgorithms[i]; 987 break; 988 } 989 } 990 } 991 992 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 993 struct smb2_negotiate_req *req, 994 unsigned int len_of_smb) 995 { 996 /* +4 is to account for the RFC1001 len field */ 997 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 998 int i = 0, len_of_ctxts; 999 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1000 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1001 __le32 status = STATUS_INVALID_PARAMETER; 1002 1003 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1004 if (len_of_smb <= offset) { 1005 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1006 return status; 1007 } 1008 1009 len_of_ctxts = len_of_smb - offset; 1010 1011 while (i++ < neg_ctxt_cnt) { 1012 int clen, ctxt_len; 1013 1014 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1015 break; 1016 1017 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1018 clen = le16_to_cpu(pctx->DataLength); 1019 ctxt_len = clen + sizeof(struct smb2_neg_context); 1020 1021 if (ctxt_len > len_of_ctxts) 1022 break; 1023 1024 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1025 ksmbd_debug(SMB, 1026 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1027 if (conn->preauth_info->Preauth_HashId) 1028 break; 1029 1030 status = decode_preauth_ctxt(conn, 1031 (struct smb2_preauth_neg_context *)pctx, 1032 ctxt_len); 1033 if (status != STATUS_SUCCESS) 1034 break; 1035 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1036 ksmbd_debug(SMB, 1037 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1038 if (conn->cipher_type) 1039 break; 1040 1041 decode_encrypt_ctxt(conn, 1042 (struct smb2_encryption_neg_context *)pctx, 1043 ctxt_len); 1044 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1045 ksmbd_debug(SMB, 1046 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1047 if (conn->compress_algorithm) 1048 break; 1049 1050 decode_compress_ctxt(conn, 1051 (struct smb2_compression_capabilities_context *)pctx); 1052 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1053 ksmbd_debug(SMB, 1054 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1055 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1056 ksmbd_debug(SMB, 1057 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1058 conn->posix_ext_supported = true; 1059 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1060 ksmbd_debug(SMB, 1061 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1062 1063 decode_sign_cap_ctxt(conn, 1064 (struct smb2_signing_capabilities *)pctx, 1065 ctxt_len); 1066 } 1067 1068 /* offsets must be 8 byte aligned */ 1069 offset = (ctxt_len + 7) & ~0x7; 1070 len_of_ctxts -= offset; 1071 } 1072 return status; 1073 } 1074 1075 /** 1076 * smb2_handle_negotiate() - handler for smb2 negotiate command 1077 * @work: smb work containing smb request buffer 1078 * 1079 * Return: 0 1080 */ 1081 int smb2_handle_negotiate(struct ksmbd_work *work) 1082 { 1083 struct ksmbd_conn *conn = work->conn; 1084 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); 1085 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); 1086 int rc = 0; 1087 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1088 __le32 status; 1089 1090 ksmbd_debug(SMB, "Received negotiate request\n"); 1091 conn->need_neg = false; 1092 if (ksmbd_conn_good(conn)) { 1093 pr_err("conn->tcp_status is already in CifsGood State\n"); 1094 work->send_no_response = 1; 1095 return rc; 1096 } 1097 1098 smb2_buf_len = get_rfc1002_len(work->request_buf); 1099 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1100 if (smb2_neg_size > smb2_buf_len) { 1101 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1102 rc = -EINVAL; 1103 goto err_out; 1104 } 1105 1106 if (req->DialectCount == 0) { 1107 pr_err("malformed packet\n"); 1108 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1109 rc = -EINVAL; 1110 goto err_out; 1111 } 1112 1113 if (conn->dialect == SMB311_PROT_ID) { 1114 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1115 1116 if (smb2_buf_len < nego_ctxt_off) { 1117 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1118 rc = -EINVAL; 1119 goto err_out; 1120 } 1121 1122 if (smb2_neg_size > nego_ctxt_off) { 1123 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1124 rc = -EINVAL; 1125 goto err_out; 1126 } 1127 1128 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1129 nego_ctxt_off) { 1130 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1131 rc = -EINVAL; 1132 goto err_out; 1133 } 1134 } else { 1135 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1136 smb2_buf_len) { 1137 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1138 rc = -EINVAL; 1139 goto err_out; 1140 } 1141 } 1142 1143 conn->cli_cap = le32_to_cpu(req->Capabilities); 1144 switch (conn->dialect) { 1145 case SMB311_PROT_ID: 1146 conn->preauth_info = 1147 kzalloc(sizeof(struct preauth_integrity_info), 1148 GFP_KERNEL); 1149 if (!conn->preauth_info) { 1150 rc = -ENOMEM; 1151 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1152 goto err_out; 1153 } 1154 1155 status = deassemble_neg_contexts(conn, req, 1156 get_rfc1002_len(work->request_buf)); 1157 if (status != STATUS_SUCCESS) { 1158 pr_err("deassemble_neg_contexts error(0x%x)\n", 1159 status); 1160 rsp->hdr.Status = status; 1161 rc = -EINVAL; 1162 kfree(conn->preauth_info); 1163 conn->preauth_info = NULL; 1164 goto err_out; 1165 } 1166 1167 rc = init_smb3_11_server(conn); 1168 if (rc < 0) { 1169 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1170 kfree(conn->preauth_info); 1171 conn->preauth_info = NULL; 1172 goto err_out; 1173 } 1174 1175 ksmbd_gen_preauth_integrity_hash(conn, 1176 work->request_buf, 1177 conn->preauth_info->Preauth_HashValue); 1178 rsp->NegotiateContextOffset = 1179 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1180 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1181 break; 1182 case SMB302_PROT_ID: 1183 init_smb3_02_server(conn); 1184 break; 1185 case SMB30_PROT_ID: 1186 init_smb3_0_server(conn); 1187 break; 1188 case SMB21_PROT_ID: 1189 init_smb2_1_server(conn); 1190 break; 1191 case SMB2X_PROT_ID: 1192 case BAD_PROT_ID: 1193 default: 1194 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1195 conn->dialect); 1196 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1197 rc = -EINVAL; 1198 goto err_out; 1199 } 1200 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 1201 1202 /* For stats */ 1203 conn->connection_type = conn->dialect; 1204 1205 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1206 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1207 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1208 1209 memcpy(conn->ClientGUID, req->ClientGUID, 1210 SMB2_CLIENT_GUID_SIZE); 1211 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1212 1213 rsp->StructureSize = cpu_to_le16(65); 1214 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1215 /* Not setting conn guid rsp->ServerGUID, as it 1216 * not used by client for identifying server 1217 */ 1218 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1219 1220 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1221 rsp->ServerStartTime = 0; 1222 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1223 le32_to_cpu(rsp->NegotiateContextOffset), 1224 le16_to_cpu(rsp->NegotiateContextCount)); 1225 1226 rsp->SecurityBufferOffset = cpu_to_le16(128); 1227 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1228 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1229 le16_to_cpu(rsp->SecurityBufferOffset)); 1230 1231 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1232 conn->use_spnego = true; 1233 1234 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1235 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1236 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1237 conn->sign = true; 1238 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1239 server_conf.enforced_signing = true; 1240 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1241 conn->sign = true; 1242 } 1243 1244 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1245 ksmbd_conn_set_need_negotiate(conn); 1246 1247 err_out: 1248 if (rc) 1249 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1250 1251 if (!rc) 1252 rc = ksmbd_iov_pin_rsp(work, rsp, 1253 sizeof(struct smb2_negotiate_rsp) + 1254 AUTH_GSS_LENGTH + neg_ctxt_len); 1255 if (rc < 0) 1256 smb2_set_err_rsp(work); 1257 return rc; 1258 } 1259 1260 static int alloc_preauth_hash(struct ksmbd_session *sess, 1261 struct ksmbd_conn *conn) 1262 { 1263 if (sess->Preauth_HashValue) 1264 return 0; 1265 1266 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1267 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); 1268 if (!sess->Preauth_HashValue) 1269 return -ENOMEM; 1270 1271 return 0; 1272 } 1273 1274 static int generate_preauth_hash(struct ksmbd_work *work) 1275 { 1276 struct ksmbd_conn *conn = work->conn; 1277 struct ksmbd_session *sess = work->sess; 1278 u8 *preauth_hash; 1279 1280 if (conn->dialect != SMB311_PROT_ID) 1281 return 0; 1282 1283 if (conn->binding) { 1284 struct preauth_session *preauth_sess; 1285 1286 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1287 if (!preauth_sess) { 1288 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1289 if (!preauth_sess) 1290 return -ENOMEM; 1291 } 1292 1293 preauth_hash = preauth_sess->Preauth_HashValue; 1294 } else { 1295 if (!sess->Preauth_HashValue) 1296 if (alloc_preauth_hash(sess, conn)) 1297 return -ENOMEM; 1298 preauth_hash = sess->Preauth_HashValue; 1299 } 1300 1301 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1302 return 0; 1303 } 1304 1305 static int decode_negotiation_token(struct ksmbd_conn *conn, 1306 struct negotiate_message *negblob, 1307 size_t sz) 1308 { 1309 if (!conn->use_spnego) 1310 return -EINVAL; 1311 1312 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1313 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1314 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1315 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1316 conn->use_spnego = false; 1317 } 1318 } 1319 return 0; 1320 } 1321 1322 static int ntlm_negotiate(struct ksmbd_work *work, 1323 struct negotiate_message *negblob, 1324 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1325 { 1326 struct challenge_message *chgblob; 1327 unsigned char *spnego_blob = NULL; 1328 u16 spnego_blob_len; 1329 char *neg_blob; 1330 int sz, rc; 1331 1332 ksmbd_debug(SMB, "negotiate phase\n"); 1333 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1334 if (rc) 1335 return rc; 1336 1337 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1338 chgblob = 1339 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); 1340 memset(chgblob, 0, sizeof(struct challenge_message)); 1341 1342 if (!work->conn->use_spnego) { 1343 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1344 if (sz < 0) 1345 return -ENOMEM; 1346 1347 rsp->SecurityBufferLength = cpu_to_le16(sz); 1348 return 0; 1349 } 1350 1351 sz = sizeof(struct challenge_message); 1352 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1353 1354 neg_blob = kzalloc(sz, GFP_KERNEL); 1355 if (!neg_blob) 1356 return -ENOMEM; 1357 1358 chgblob = (struct challenge_message *)neg_blob; 1359 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1360 if (sz < 0) { 1361 rc = -ENOMEM; 1362 goto out; 1363 } 1364 1365 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1366 neg_blob, sz); 1367 if (rc) { 1368 rc = -ENOMEM; 1369 goto out; 1370 } 1371 1372 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1373 unsafe_memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len, 1374 /* alloc is larger than blob, see smb2_allocate_rsp_buf() */); 1375 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1376 1377 out: 1378 kfree(spnego_blob); 1379 kfree(neg_blob); 1380 return rc; 1381 } 1382 1383 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1384 struct smb2_sess_setup_req *req) 1385 { 1386 int sz; 1387 1388 if (conn->use_spnego && conn->mechToken) 1389 return (struct authenticate_message *)conn->mechToken; 1390 1391 sz = le16_to_cpu(req->SecurityBufferOffset); 1392 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1393 + sz); 1394 } 1395 1396 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1397 struct smb2_sess_setup_req *req) 1398 { 1399 struct authenticate_message *authblob; 1400 struct ksmbd_user *user; 1401 char *name; 1402 unsigned int name_off, name_len, secbuf_len; 1403 1404 if (conn->use_spnego && conn->mechToken) 1405 secbuf_len = conn->mechTokenLen; 1406 else 1407 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1408 if (secbuf_len < sizeof(struct authenticate_message)) { 1409 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1410 return NULL; 1411 } 1412 authblob = user_authblob(conn, req); 1413 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1414 name_len = le16_to_cpu(authblob->UserName.Length); 1415 1416 if (secbuf_len < (u64)name_off + name_len) 1417 return NULL; 1418 1419 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1420 name_len, 1421 true, 1422 conn->local_nls); 1423 if (IS_ERR(name)) { 1424 pr_err("cannot allocate memory\n"); 1425 return NULL; 1426 } 1427 1428 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1429 user = ksmbd_login_user(name); 1430 kfree(name); 1431 return user; 1432 } 1433 1434 static int ntlm_authenticate(struct ksmbd_work *work, 1435 struct smb2_sess_setup_req *req, 1436 struct smb2_sess_setup_rsp *rsp) 1437 { 1438 struct ksmbd_conn *conn = work->conn; 1439 struct ksmbd_session *sess = work->sess; 1440 struct channel *chann = NULL; 1441 struct ksmbd_user *user; 1442 u64 prev_id; 1443 int sz, rc; 1444 1445 ksmbd_debug(SMB, "authenticate phase\n"); 1446 if (conn->use_spnego) { 1447 unsigned char *spnego_blob; 1448 u16 spnego_blob_len; 1449 1450 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1451 &spnego_blob_len, 1452 0); 1453 if (rc) 1454 return -ENOMEM; 1455 1456 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1457 unsafe_memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, 1458 spnego_blob_len, 1459 /* alloc is larger than blob, see smb2_allocate_rsp_buf() */); 1460 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1461 kfree(spnego_blob); 1462 } 1463 1464 user = session_user(conn, req); 1465 if (!user) { 1466 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1467 return -EPERM; 1468 } 1469 1470 /* Check for previous session */ 1471 prev_id = le64_to_cpu(req->PreviousSessionId); 1472 if (prev_id && prev_id != sess->id) 1473 destroy_previous_session(conn, user, prev_id); 1474 1475 if (sess->state == SMB2_SESSION_VALID) { 1476 /* 1477 * Reuse session if anonymous try to connect 1478 * on reauthetication. 1479 */ 1480 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1481 ksmbd_free_user(user); 1482 return 0; 1483 } 1484 1485 if (!ksmbd_compare_user(sess->user, user)) { 1486 ksmbd_free_user(user); 1487 return -EPERM; 1488 } 1489 ksmbd_free_user(user); 1490 } else { 1491 sess->user = user; 1492 } 1493 1494 if (conn->binding == false && user_guest(sess->user)) { 1495 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1496 } else { 1497 struct authenticate_message *authblob; 1498 1499 authblob = user_authblob(conn, req); 1500 if (conn->use_spnego && conn->mechToken) 1501 sz = conn->mechTokenLen; 1502 else 1503 sz = le16_to_cpu(req->SecurityBufferLength); 1504 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1505 if (rc) { 1506 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1507 ksmbd_debug(SMB, "authentication failed\n"); 1508 return -EPERM; 1509 } 1510 } 1511 1512 /* 1513 * If session state is SMB2_SESSION_VALID, We can assume 1514 * that it is reauthentication. And the user/password 1515 * has been verified, so return it here. 1516 */ 1517 if (sess->state == SMB2_SESSION_VALID) { 1518 if (conn->binding) 1519 goto binding_session; 1520 return 0; 1521 } 1522 1523 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1524 (conn->sign || server_conf.enforced_signing)) || 1525 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1526 sess->sign = true; 1527 1528 if (smb3_encryption_negotiated(conn) && 1529 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1530 rc = conn->ops->generate_encryptionkey(conn, sess); 1531 if (rc) { 1532 ksmbd_debug(SMB, 1533 "SMB3 encryption key generation failed\n"); 1534 return -EINVAL; 1535 } 1536 sess->enc = true; 1537 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1538 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1539 /* 1540 * signing is disable if encryption is enable 1541 * on this session 1542 */ 1543 sess->sign = false; 1544 } 1545 1546 binding_session: 1547 if (conn->dialect >= SMB30_PROT_ID) { 1548 chann = lookup_chann_list(sess, conn); 1549 if (!chann) { 1550 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1551 if (!chann) 1552 return -ENOMEM; 1553 1554 chann->conn = conn; 1555 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1556 } 1557 } 1558 1559 if (conn->ops->generate_signingkey) { 1560 rc = conn->ops->generate_signingkey(sess, conn); 1561 if (rc) { 1562 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1563 return -EINVAL; 1564 } 1565 } 1566 1567 if (!ksmbd_conn_lookup_dialect(conn)) { 1568 pr_err("fail to verify the dialect\n"); 1569 return -ENOENT; 1570 } 1571 return 0; 1572 } 1573 1574 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1575 static int krb5_authenticate(struct ksmbd_work *work, 1576 struct smb2_sess_setup_req *req, 1577 struct smb2_sess_setup_rsp *rsp) 1578 { 1579 struct ksmbd_conn *conn = work->conn; 1580 struct ksmbd_session *sess = work->sess; 1581 char *in_blob, *out_blob; 1582 struct channel *chann = NULL; 1583 u64 prev_sess_id; 1584 int in_len, out_len; 1585 int retval; 1586 1587 in_blob = (char *)&req->hdr.ProtocolId + 1588 le16_to_cpu(req->SecurityBufferOffset); 1589 in_len = le16_to_cpu(req->SecurityBufferLength); 1590 out_blob = (char *)&rsp->hdr.ProtocolId + 1591 le16_to_cpu(rsp->SecurityBufferOffset); 1592 out_len = work->response_sz - 1593 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1594 1595 /* Check previous session */ 1596 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1597 if (prev_sess_id && prev_sess_id != sess->id) 1598 destroy_previous_session(conn, sess->user, prev_sess_id); 1599 1600 if (sess->state == SMB2_SESSION_VALID) 1601 ksmbd_free_user(sess->user); 1602 1603 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1604 out_blob, &out_len); 1605 if (retval) { 1606 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1607 return -EINVAL; 1608 } 1609 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1610 1611 if ((conn->sign || server_conf.enforced_signing) || 1612 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1613 sess->sign = true; 1614 1615 if (smb3_encryption_negotiated(conn)) { 1616 retval = conn->ops->generate_encryptionkey(conn, sess); 1617 if (retval) { 1618 ksmbd_debug(SMB, 1619 "SMB3 encryption key generation failed\n"); 1620 return -EINVAL; 1621 } 1622 sess->enc = true; 1623 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1624 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1625 sess->sign = false; 1626 } 1627 1628 if (conn->dialect >= SMB30_PROT_ID) { 1629 chann = lookup_chann_list(sess, conn); 1630 if (!chann) { 1631 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1632 if (!chann) 1633 return -ENOMEM; 1634 1635 chann->conn = conn; 1636 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1637 } 1638 } 1639 1640 if (conn->ops->generate_signingkey) { 1641 retval = conn->ops->generate_signingkey(sess, conn); 1642 if (retval) { 1643 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1644 return -EINVAL; 1645 } 1646 } 1647 1648 if (!ksmbd_conn_lookup_dialect(conn)) { 1649 pr_err("fail to verify the dialect\n"); 1650 return -ENOENT; 1651 } 1652 return 0; 1653 } 1654 #else 1655 static int krb5_authenticate(struct ksmbd_work *work, 1656 struct smb2_sess_setup_req *req, 1657 struct smb2_sess_setup_rsp *rsp) 1658 { 1659 return -EOPNOTSUPP; 1660 } 1661 #endif 1662 1663 int smb2_sess_setup(struct ksmbd_work *work) 1664 { 1665 struct ksmbd_conn *conn = work->conn; 1666 struct smb2_sess_setup_req *req; 1667 struct smb2_sess_setup_rsp *rsp; 1668 struct ksmbd_session *sess; 1669 struct negotiate_message *negblob; 1670 unsigned int negblob_len, negblob_off; 1671 int rc = 0; 1672 1673 ksmbd_debug(SMB, "Received request for session setup\n"); 1674 1675 WORK_BUFFERS(work, req, rsp); 1676 1677 rsp->StructureSize = cpu_to_le16(9); 1678 rsp->SessionFlags = 0; 1679 rsp->SecurityBufferOffset = cpu_to_le16(72); 1680 rsp->SecurityBufferLength = 0; 1681 1682 ksmbd_conn_lock(conn); 1683 if (!req->hdr.SessionId) { 1684 sess = ksmbd_smb2_session_create(); 1685 if (!sess) { 1686 rc = -ENOMEM; 1687 goto out_err; 1688 } 1689 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1690 rc = ksmbd_session_register(conn, sess); 1691 if (rc) 1692 goto out_err; 1693 } else if (conn->dialect >= SMB30_PROT_ID && 1694 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1695 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1696 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1697 1698 sess = ksmbd_session_lookup_slowpath(sess_id); 1699 if (!sess) { 1700 rc = -ENOENT; 1701 goto out_err; 1702 } 1703 1704 if (conn->dialect != sess->dialect) { 1705 rc = -EINVAL; 1706 goto out_err; 1707 } 1708 1709 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1710 rc = -EINVAL; 1711 goto out_err; 1712 } 1713 1714 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1715 SMB2_CLIENT_GUID_SIZE)) { 1716 rc = -ENOENT; 1717 goto out_err; 1718 } 1719 1720 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1721 rc = -EACCES; 1722 goto out_err; 1723 } 1724 1725 if (sess->state == SMB2_SESSION_EXPIRED) { 1726 rc = -EFAULT; 1727 goto out_err; 1728 } 1729 1730 if (ksmbd_conn_need_reconnect(conn)) { 1731 rc = -EFAULT; 1732 sess = NULL; 1733 goto out_err; 1734 } 1735 1736 if (ksmbd_session_lookup(conn, sess_id)) { 1737 rc = -EACCES; 1738 goto out_err; 1739 } 1740 1741 if (user_guest(sess->user)) { 1742 rc = -EOPNOTSUPP; 1743 goto out_err; 1744 } 1745 1746 conn->binding = true; 1747 } else if ((conn->dialect < SMB30_PROT_ID || 1748 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1749 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1750 sess = NULL; 1751 rc = -EACCES; 1752 goto out_err; 1753 } else { 1754 sess = ksmbd_session_lookup(conn, 1755 le64_to_cpu(req->hdr.SessionId)); 1756 if (!sess) { 1757 rc = -ENOENT; 1758 goto out_err; 1759 } 1760 1761 if (sess->state == SMB2_SESSION_EXPIRED) { 1762 rc = -EFAULT; 1763 goto out_err; 1764 } 1765 1766 if (ksmbd_conn_need_reconnect(conn)) { 1767 rc = -EFAULT; 1768 sess = NULL; 1769 goto out_err; 1770 } 1771 } 1772 work->sess = sess; 1773 1774 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1775 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1776 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { 1777 rc = -EINVAL; 1778 goto out_err; 1779 } 1780 1781 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1782 negblob_off); 1783 1784 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1785 if (conn->mechToken) { 1786 negblob = (struct negotiate_message *)conn->mechToken; 1787 negblob_len = conn->mechTokenLen; 1788 } 1789 } 1790 1791 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1792 rc = -EINVAL; 1793 goto out_err; 1794 } 1795 1796 if (server_conf.auth_mechs & conn->auth_mechs) { 1797 rc = generate_preauth_hash(work); 1798 if (rc) 1799 goto out_err; 1800 1801 if (conn->preferred_auth_mech & 1802 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1803 rc = krb5_authenticate(work, req, rsp); 1804 if (rc) { 1805 rc = -EINVAL; 1806 goto out_err; 1807 } 1808 1809 if (!ksmbd_conn_need_reconnect(conn)) { 1810 ksmbd_conn_set_good(conn); 1811 sess->state = SMB2_SESSION_VALID; 1812 } 1813 kfree(sess->Preauth_HashValue); 1814 sess->Preauth_HashValue = NULL; 1815 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1816 if (negblob->MessageType == NtLmNegotiate) { 1817 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1818 if (rc) 1819 goto out_err; 1820 rsp->hdr.Status = 1821 STATUS_MORE_PROCESSING_REQUIRED; 1822 } else if (negblob->MessageType == NtLmAuthenticate) { 1823 rc = ntlm_authenticate(work, req, rsp); 1824 if (rc) 1825 goto out_err; 1826 1827 if (!ksmbd_conn_need_reconnect(conn)) { 1828 ksmbd_conn_set_good(conn); 1829 sess->state = SMB2_SESSION_VALID; 1830 } 1831 if (conn->binding) { 1832 struct preauth_session *preauth_sess; 1833 1834 preauth_sess = 1835 ksmbd_preauth_session_lookup(conn, sess->id); 1836 if (preauth_sess) { 1837 list_del(&preauth_sess->preauth_entry); 1838 kfree(preauth_sess); 1839 } 1840 } 1841 kfree(sess->Preauth_HashValue); 1842 sess->Preauth_HashValue = NULL; 1843 } else { 1844 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1845 le32_to_cpu(negblob->MessageType)); 1846 rc = -EINVAL; 1847 } 1848 } else { 1849 /* TODO: need one more negotiation */ 1850 pr_err("Not support the preferred authentication\n"); 1851 rc = -EINVAL; 1852 } 1853 } else { 1854 pr_err("Not support authentication\n"); 1855 rc = -EINVAL; 1856 } 1857 1858 out_err: 1859 if (rc == -EINVAL) 1860 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1861 else if (rc == -ENOENT) 1862 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1863 else if (rc == -EACCES) 1864 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1865 else if (rc == -EFAULT) 1866 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1867 else if (rc == -ENOMEM) 1868 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1869 else if (rc == -EOPNOTSUPP) 1870 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1871 else if (rc) 1872 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1873 1874 if (conn->use_spnego && conn->mechToken) { 1875 kfree(conn->mechToken); 1876 conn->mechToken = NULL; 1877 } 1878 1879 if (rc < 0) { 1880 /* 1881 * SecurityBufferOffset should be set to zero 1882 * in session setup error response. 1883 */ 1884 rsp->SecurityBufferOffset = 0; 1885 1886 if (sess) { 1887 bool try_delay = false; 1888 1889 /* 1890 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1891 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1892 * failure to make it harder to send enough random connection requests 1893 * to break into a server. 1894 */ 1895 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1896 try_delay = true; 1897 1898 sess->last_active = jiffies; 1899 sess->state = SMB2_SESSION_EXPIRED; 1900 if (try_delay) { 1901 ksmbd_conn_set_need_reconnect(conn); 1902 ssleep(5); 1903 ksmbd_conn_set_need_negotiate(conn); 1904 } 1905 } 1906 smb2_set_err_rsp(work); 1907 } else { 1908 unsigned int iov_len; 1909 1910 if (rsp->SecurityBufferLength) 1911 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1912 le16_to_cpu(rsp->SecurityBufferLength); 1913 else 1914 iov_len = sizeof(struct smb2_sess_setup_rsp); 1915 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1916 if (rc) 1917 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1918 } 1919 1920 ksmbd_conn_unlock(conn); 1921 return rc; 1922 } 1923 1924 /** 1925 * smb2_tree_connect() - handler for smb2 tree connect command 1926 * @work: smb work containing smb request buffer 1927 * 1928 * Return: 0 on success, otherwise error 1929 */ 1930 int smb2_tree_connect(struct ksmbd_work *work) 1931 { 1932 struct ksmbd_conn *conn = work->conn; 1933 struct smb2_tree_connect_req *req; 1934 struct smb2_tree_connect_rsp *rsp; 1935 struct ksmbd_session *sess = work->sess; 1936 char *treename = NULL, *name = NULL; 1937 struct ksmbd_tree_conn_status status; 1938 struct ksmbd_share_config *share = NULL; 1939 int rc = -EINVAL; 1940 1941 WORK_BUFFERS(work, req, rsp); 1942 1943 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), 1944 le16_to_cpu(req->PathLength), true, 1945 conn->local_nls); 1946 if (IS_ERR(treename)) { 1947 pr_err("treename is NULL\n"); 1948 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1949 goto out_err1; 1950 } 1951 1952 name = ksmbd_extract_sharename(conn->um, treename); 1953 if (IS_ERR(name)) { 1954 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1955 goto out_err1; 1956 } 1957 1958 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 1959 name, treename); 1960 1961 status = ksmbd_tree_conn_connect(work, name); 1962 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 1963 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 1964 else 1965 goto out_err1; 1966 1967 share = status.tree_conn->share_conf; 1968 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 1969 ksmbd_debug(SMB, "IPC share path request\n"); 1970 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 1971 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1972 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 1973 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 1974 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1975 FILE_SYNCHRONIZE_LE; 1976 } else { 1977 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 1978 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1979 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 1980 if (test_tree_conn_flag(status.tree_conn, 1981 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 1982 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 1983 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 1984 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 1985 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 1986 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1987 FILE_SYNCHRONIZE_LE; 1988 } 1989 } 1990 1991 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 1992 if (conn->posix_ext_supported) 1993 status.tree_conn->posix_extensions = true; 1994 1995 write_lock(&sess->tree_conns_lock); 1996 status.tree_conn->t_state = TREE_CONNECTED; 1997 write_unlock(&sess->tree_conns_lock); 1998 rsp->StructureSize = cpu_to_le16(16); 1999 out_err1: 2000 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share && 2001 test_share_config_flag(share, 2002 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 2003 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY; 2004 else 2005 rsp->Capabilities = 0; 2006 rsp->Reserved = 0; 2007 /* default manual caching */ 2008 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2009 2010 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2011 if (rc) 2012 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2013 2014 if (!IS_ERR(treename)) 2015 kfree(treename); 2016 if (!IS_ERR(name)) 2017 kfree(name); 2018 2019 switch (status.ret) { 2020 case KSMBD_TREE_CONN_STATUS_OK: 2021 rsp->hdr.Status = STATUS_SUCCESS; 2022 rc = 0; 2023 break; 2024 case -ESTALE: 2025 case -ENOENT: 2026 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2027 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2028 break; 2029 case -ENOMEM: 2030 case KSMBD_TREE_CONN_STATUS_NOMEM: 2031 rsp->hdr.Status = STATUS_NO_MEMORY; 2032 break; 2033 case KSMBD_TREE_CONN_STATUS_ERROR: 2034 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2035 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2036 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2037 break; 2038 case -EINVAL: 2039 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2040 break; 2041 default: 2042 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2043 } 2044 2045 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2046 smb2_set_err_rsp(work); 2047 2048 return rc; 2049 } 2050 2051 /** 2052 * smb2_create_open_flags() - convert smb open flags to unix open flags 2053 * @file_present: is file already present 2054 * @access: file access flags 2055 * @disposition: file disposition flags 2056 * @may_flags: set with MAY_ flags 2057 * @is_dir: is creating open flags for directory 2058 * 2059 * Return: file open flags 2060 */ 2061 static int smb2_create_open_flags(bool file_present, __le32 access, 2062 __le32 disposition, 2063 int *may_flags, 2064 bool is_dir) 2065 { 2066 int oflags = O_NONBLOCK | O_LARGEFILE; 2067 2068 if (is_dir) { 2069 access &= ~FILE_WRITE_DESIRE_ACCESS_LE; 2070 ksmbd_debug(SMB, "Discard write access to a directory\n"); 2071 } 2072 2073 if (access & FILE_READ_DESIRED_ACCESS_LE && 2074 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2075 oflags |= O_RDWR; 2076 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2077 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2078 oflags |= O_WRONLY; 2079 *may_flags = MAY_OPEN | MAY_WRITE; 2080 } else { 2081 oflags |= O_RDONLY; 2082 *may_flags = MAY_OPEN | MAY_READ; 2083 } 2084 2085 if (access == FILE_READ_ATTRIBUTES_LE) 2086 oflags |= O_PATH; 2087 2088 if (file_present) { 2089 switch (disposition & FILE_CREATE_MASK_LE) { 2090 case FILE_OPEN_LE: 2091 case FILE_CREATE_LE: 2092 break; 2093 case FILE_SUPERSEDE_LE: 2094 case FILE_OVERWRITE_LE: 2095 case FILE_OVERWRITE_IF_LE: 2096 oflags |= O_TRUNC; 2097 break; 2098 default: 2099 break; 2100 } 2101 } else { 2102 switch (disposition & FILE_CREATE_MASK_LE) { 2103 case FILE_SUPERSEDE_LE: 2104 case FILE_CREATE_LE: 2105 case FILE_OPEN_IF_LE: 2106 case FILE_OVERWRITE_IF_LE: 2107 oflags |= O_CREAT; 2108 break; 2109 case FILE_OPEN_LE: 2110 case FILE_OVERWRITE_LE: 2111 oflags &= ~O_CREAT; 2112 break; 2113 default: 2114 break; 2115 } 2116 } 2117 2118 return oflags; 2119 } 2120 2121 /** 2122 * smb2_tree_disconnect() - handler for smb tree connect request 2123 * @work: smb work containing request buffer 2124 * 2125 * Return: 0 2126 */ 2127 int smb2_tree_disconnect(struct ksmbd_work *work) 2128 { 2129 struct smb2_tree_disconnect_rsp *rsp; 2130 struct smb2_tree_disconnect_req *req; 2131 struct ksmbd_session *sess = work->sess; 2132 struct ksmbd_tree_connect *tcon = work->tcon; 2133 int err; 2134 2135 WORK_BUFFERS(work, req, rsp); 2136 2137 ksmbd_debug(SMB, "request\n"); 2138 2139 if (!tcon) { 2140 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2141 2142 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2143 err = -ENOENT; 2144 goto err_out; 2145 } 2146 2147 ksmbd_close_tree_conn_fds(work); 2148 2149 write_lock(&sess->tree_conns_lock); 2150 if (tcon->t_state == TREE_DISCONNECTED) { 2151 write_unlock(&sess->tree_conns_lock); 2152 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2153 err = -ENOENT; 2154 goto err_out; 2155 } 2156 2157 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount)); 2158 tcon->t_state = TREE_DISCONNECTED; 2159 write_unlock(&sess->tree_conns_lock); 2160 2161 err = ksmbd_tree_conn_disconnect(sess, tcon); 2162 if (err) { 2163 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2164 goto err_out; 2165 } 2166 2167 work->tcon = NULL; 2168 2169 rsp->StructureSize = cpu_to_le16(4); 2170 err = ksmbd_iov_pin_rsp(work, rsp, 2171 sizeof(struct smb2_tree_disconnect_rsp)); 2172 if (err) { 2173 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2174 goto err_out; 2175 } 2176 2177 return 0; 2178 2179 err_out: 2180 smb2_set_err_rsp(work); 2181 return err; 2182 2183 } 2184 2185 /** 2186 * smb2_session_logoff() - handler for session log off request 2187 * @work: smb work containing request buffer 2188 * 2189 * Return: 0 2190 */ 2191 int smb2_session_logoff(struct ksmbd_work *work) 2192 { 2193 struct ksmbd_conn *conn = work->conn; 2194 struct smb2_logoff_req *req; 2195 struct smb2_logoff_rsp *rsp; 2196 struct ksmbd_session *sess; 2197 u64 sess_id; 2198 int err; 2199 2200 WORK_BUFFERS(work, req, rsp); 2201 2202 ksmbd_debug(SMB, "request\n"); 2203 2204 ksmbd_conn_lock(conn); 2205 if (!ksmbd_conn_good(conn)) { 2206 ksmbd_conn_unlock(conn); 2207 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2208 smb2_set_err_rsp(work); 2209 return -ENOENT; 2210 } 2211 sess_id = le64_to_cpu(req->hdr.SessionId); 2212 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2213 ksmbd_conn_unlock(conn); 2214 2215 ksmbd_close_session_fds(work); 2216 ksmbd_conn_wait_idle(conn); 2217 2218 /* 2219 * Re-lookup session to validate if session is deleted 2220 * while waiting request complete 2221 */ 2222 sess = ksmbd_session_lookup_all(conn, sess_id); 2223 if (ksmbd_tree_conn_session_logoff(sess)) { 2224 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2225 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2226 smb2_set_err_rsp(work); 2227 return -ENOENT; 2228 } 2229 2230 ksmbd_destroy_file_table(&sess->file_table); 2231 sess->state = SMB2_SESSION_EXPIRED; 2232 2233 ksmbd_free_user(sess->user); 2234 sess->user = NULL; 2235 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); 2236 2237 rsp->StructureSize = cpu_to_le16(4); 2238 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2239 if (err) { 2240 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2241 smb2_set_err_rsp(work); 2242 return err; 2243 } 2244 return 0; 2245 } 2246 2247 /** 2248 * create_smb2_pipe() - create IPC pipe 2249 * @work: smb work containing request buffer 2250 * 2251 * Return: 0 on success, otherwise error 2252 */ 2253 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2254 { 2255 struct smb2_create_rsp *rsp; 2256 struct smb2_create_req *req; 2257 int id; 2258 int err; 2259 char *name; 2260 2261 WORK_BUFFERS(work, req, rsp); 2262 2263 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2264 1, work->conn->local_nls); 2265 if (IS_ERR(name)) { 2266 rsp->hdr.Status = STATUS_NO_MEMORY; 2267 err = PTR_ERR(name); 2268 goto out; 2269 } 2270 2271 id = ksmbd_session_rpc_open(work->sess, name); 2272 if (id < 0) { 2273 pr_err("Unable to open RPC pipe: %d\n", id); 2274 err = id; 2275 goto out; 2276 } 2277 2278 rsp->hdr.Status = STATUS_SUCCESS; 2279 rsp->StructureSize = cpu_to_le16(89); 2280 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2281 rsp->Flags = 0; 2282 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2283 2284 rsp->CreationTime = cpu_to_le64(0); 2285 rsp->LastAccessTime = cpu_to_le64(0); 2286 rsp->ChangeTime = cpu_to_le64(0); 2287 rsp->AllocationSize = cpu_to_le64(0); 2288 rsp->EndofFile = cpu_to_le64(0); 2289 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2290 rsp->Reserved2 = 0; 2291 rsp->VolatileFileId = id; 2292 rsp->PersistentFileId = 0; 2293 rsp->CreateContextsOffset = 0; 2294 rsp->CreateContextsLength = 0; 2295 2296 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2297 if (err) 2298 goto out; 2299 2300 kfree(name); 2301 return 0; 2302 2303 out: 2304 switch (err) { 2305 case -EINVAL: 2306 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2307 break; 2308 case -ENOSPC: 2309 case -ENOMEM: 2310 rsp->hdr.Status = STATUS_NO_MEMORY; 2311 break; 2312 } 2313 2314 if (!IS_ERR(name)) 2315 kfree(name); 2316 2317 smb2_set_err_rsp(work); 2318 return err; 2319 } 2320 2321 /** 2322 * smb2_set_ea() - handler for setting extended attributes using set 2323 * info command 2324 * @eabuf: set info command buffer 2325 * @buf_len: set info command buffer length 2326 * @path: dentry path for get ea 2327 * @get_write: get write access to a mount 2328 * 2329 * Return: 0 on success, otherwise error 2330 */ 2331 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2332 const struct path *path, bool get_write) 2333 { 2334 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2335 char *attr_name = NULL, *value; 2336 int rc = 0; 2337 unsigned int next = 0; 2338 2339 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2340 le16_to_cpu(eabuf->EaValueLength)) 2341 return -EINVAL; 2342 2343 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); 2344 if (!attr_name) 2345 return -ENOMEM; 2346 2347 do { 2348 if (!eabuf->EaNameLength) 2349 goto next; 2350 2351 ksmbd_debug(SMB, 2352 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2353 eabuf->name, eabuf->EaNameLength, 2354 le16_to_cpu(eabuf->EaValueLength), 2355 le32_to_cpu(eabuf->NextEntryOffset)); 2356 2357 if (eabuf->EaNameLength > 2358 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2359 rc = -EINVAL; 2360 break; 2361 } 2362 2363 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2364 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2365 eabuf->EaNameLength); 2366 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2367 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2368 2369 if (!eabuf->EaValueLength) { 2370 rc = ksmbd_vfs_casexattr_len(idmap, 2371 path->dentry, 2372 attr_name, 2373 XATTR_USER_PREFIX_LEN + 2374 eabuf->EaNameLength); 2375 2376 /* delete the EA only when it exits */ 2377 if (rc > 0) { 2378 rc = ksmbd_vfs_remove_xattr(idmap, 2379 path, 2380 attr_name, 2381 get_write); 2382 2383 if (rc < 0) { 2384 ksmbd_debug(SMB, 2385 "remove xattr failed(%d)\n", 2386 rc); 2387 break; 2388 } 2389 } 2390 2391 /* if the EA doesn't exist, just do nothing. */ 2392 rc = 0; 2393 } else { 2394 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2395 le16_to_cpu(eabuf->EaValueLength), 2396 0, get_write); 2397 if (rc < 0) { 2398 ksmbd_debug(SMB, 2399 "ksmbd_vfs_setxattr is failed(%d)\n", 2400 rc); 2401 break; 2402 } 2403 } 2404 2405 next: 2406 next = le32_to_cpu(eabuf->NextEntryOffset); 2407 if (next == 0 || buf_len < next) 2408 break; 2409 buf_len -= next; 2410 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2411 if (buf_len < sizeof(struct smb2_ea_info)) { 2412 rc = -EINVAL; 2413 break; 2414 } 2415 2416 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2417 le16_to_cpu(eabuf->EaValueLength)) { 2418 rc = -EINVAL; 2419 break; 2420 } 2421 } while (next != 0); 2422 2423 kfree(attr_name); 2424 return rc; 2425 } 2426 2427 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2428 struct ksmbd_file *fp, 2429 char *stream_name, int s_type) 2430 { 2431 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2432 size_t xattr_stream_size; 2433 char *xattr_stream_name; 2434 int rc; 2435 2436 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2437 &xattr_stream_name, 2438 &xattr_stream_size, 2439 s_type); 2440 if (rc) 2441 return rc; 2442 2443 fp->stream.name = xattr_stream_name; 2444 fp->stream.size = xattr_stream_size; 2445 2446 /* Check if there is stream prefix in xattr space */ 2447 rc = ksmbd_vfs_casexattr_len(idmap, 2448 path->dentry, 2449 xattr_stream_name, 2450 xattr_stream_size); 2451 if (rc >= 0) 2452 return 0; 2453 2454 if (fp->cdoption == FILE_OPEN_LE) { 2455 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2456 return -EBADF; 2457 } 2458 2459 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2460 if (rc < 0) 2461 pr_err("Failed to store XATTR stream name :%d\n", rc); 2462 return 0; 2463 } 2464 2465 static int smb2_remove_smb_xattrs(const struct path *path) 2466 { 2467 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2468 char *name, *xattr_list = NULL; 2469 ssize_t xattr_list_len; 2470 int err = 0; 2471 2472 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2473 if (xattr_list_len < 0) { 2474 goto out; 2475 } else if (!xattr_list_len) { 2476 ksmbd_debug(SMB, "empty xattr in the file\n"); 2477 goto out; 2478 } 2479 2480 for (name = xattr_list; name - xattr_list < xattr_list_len; 2481 name += strlen(name) + 1) { 2482 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2483 2484 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2485 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2486 STREAM_PREFIX_LEN)) { 2487 err = ksmbd_vfs_remove_xattr(idmap, path, 2488 name, true); 2489 if (err) 2490 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2491 name); 2492 } 2493 } 2494 out: 2495 kvfree(xattr_list); 2496 return err; 2497 } 2498 2499 static int smb2_create_truncate(const struct path *path) 2500 { 2501 int rc = vfs_truncate(path, 0); 2502 2503 if (rc) { 2504 pr_err("vfs_truncate failed, rc %d\n", rc); 2505 return rc; 2506 } 2507 2508 rc = smb2_remove_smb_xattrs(path); 2509 if (rc == -EOPNOTSUPP) 2510 rc = 0; 2511 if (rc) 2512 ksmbd_debug(SMB, 2513 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2514 rc); 2515 return rc; 2516 } 2517 2518 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2519 struct ksmbd_file *fp) 2520 { 2521 struct xattr_dos_attrib da = {0}; 2522 int rc; 2523 2524 if (!test_share_config_flag(tcon->share_conf, 2525 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2526 return; 2527 2528 da.version = 4; 2529 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2530 da.itime = da.create_time = fp->create_time; 2531 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2532 XATTR_DOSINFO_ITIME; 2533 2534 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); 2535 if (rc) 2536 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2537 } 2538 2539 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2540 const struct path *path, struct ksmbd_file *fp) 2541 { 2542 struct xattr_dos_attrib da; 2543 int rc; 2544 2545 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2546 2547 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2548 if (!test_share_config_flag(tcon->share_conf, 2549 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2550 return; 2551 2552 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2553 path->dentry, &da); 2554 if (rc > 0) { 2555 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2556 fp->create_time = da.create_time; 2557 fp->itime = da.itime; 2558 } 2559 } 2560 2561 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path, 2562 struct path *path, char *name, int open_flags, 2563 umode_t posix_mode, bool is_dir) 2564 { 2565 struct ksmbd_tree_connect *tcon = work->tcon; 2566 struct ksmbd_share_config *share = tcon->share_conf; 2567 umode_t mode; 2568 int rc; 2569 2570 if (!(open_flags & O_CREAT)) 2571 return -EBADF; 2572 2573 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2574 if (is_dir == true) { 2575 ksmbd_debug(SMB, "creating directory\n"); 2576 2577 mode = share_config_directory_mode(share, posix_mode); 2578 rc = ksmbd_vfs_mkdir(work, name, mode); 2579 if (rc) 2580 return rc; 2581 } else { 2582 ksmbd_debug(SMB, "creating regular file\n"); 2583 2584 mode = share_config_create_mode(share, posix_mode); 2585 rc = ksmbd_vfs_create(work, name, mode); 2586 if (rc) 2587 return rc; 2588 } 2589 2590 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0); 2591 if (rc) { 2592 pr_err("cannot get linux path (%s), err = %d\n", 2593 name, rc); 2594 return rc; 2595 } 2596 return 0; 2597 } 2598 2599 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2600 struct smb2_create_req *req, 2601 const struct path *path) 2602 { 2603 struct create_context *context; 2604 struct create_sd_buf_req *sd_buf; 2605 2606 if (!req->CreateContextsOffset) 2607 return -ENOENT; 2608 2609 /* Parse SD BUFFER create contexts */ 2610 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2611 if (!context) 2612 return -ENOENT; 2613 else if (IS_ERR(context)) 2614 return PTR_ERR(context); 2615 2616 ksmbd_debug(SMB, 2617 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2618 sd_buf = (struct create_sd_buf_req *)context; 2619 if (le16_to_cpu(context->DataOffset) + 2620 le32_to_cpu(context->DataLength) < 2621 sizeof(struct create_sd_buf_req)) 2622 return -EINVAL; 2623 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2624 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2625 } 2626 2627 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2628 struct mnt_idmap *idmap, 2629 struct inode *inode) 2630 { 2631 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2632 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2633 2634 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2635 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2636 fattr->cf_mode = inode->i_mode; 2637 fattr->cf_acls = NULL; 2638 fattr->cf_dacls = NULL; 2639 2640 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2641 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2642 if (S_ISDIR(inode->i_mode)) 2643 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2644 } 2645 } 2646 2647 enum { 2648 DURABLE_RECONN_V2 = 1, 2649 DURABLE_RECONN, 2650 DURABLE_REQ_V2, 2651 DURABLE_REQ, 2652 }; 2653 2654 struct durable_info { 2655 struct ksmbd_file *fp; 2656 unsigned short int type; 2657 bool persistent; 2658 bool reconnected; 2659 unsigned int timeout; 2660 char *CreateGuid; 2661 }; 2662 2663 static int parse_durable_handle_context(struct ksmbd_work *work, 2664 struct smb2_create_req *req, 2665 struct lease_ctx_info *lc, 2666 struct durable_info *dh_info) 2667 { 2668 struct ksmbd_conn *conn = work->conn; 2669 struct create_context *context; 2670 int dh_idx, err = 0; 2671 u64 persistent_id = 0; 2672 int req_op_level; 2673 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; 2674 2675 req_op_level = req->RequestedOplockLevel; 2676 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); 2677 dh_idx++) { 2678 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); 2679 if (IS_ERR(context)) { 2680 err = PTR_ERR(context); 2681 goto out; 2682 } 2683 if (!context) 2684 continue; 2685 2686 switch (dh_idx) { 2687 case DURABLE_RECONN_V2: 2688 { 2689 struct create_durable_reconn_v2_req *recon_v2; 2690 2691 if (dh_info->type == DURABLE_RECONN || 2692 dh_info->type == DURABLE_REQ_V2) { 2693 err = -EINVAL; 2694 goto out; 2695 } 2696 2697 recon_v2 = (struct create_durable_reconn_v2_req *)context; 2698 persistent_id = recon_v2->Fid.PersistentFileId; 2699 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2700 if (!dh_info->fp) { 2701 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2702 err = -EBADF; 2703 goto out; 2704 } 2705 2706 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid, 2707 SMB2_CREATE_GUID_SIZE)) { 2708 err = -EBADF; 2709 ksmbd_put_durable_fd(dh_info->fp); 2710 goto out; 2711 } 2712 2713 dh_info->type = dh_idx; 2714 dh_info->reconnected = true; 2715 ksmbd_debug(SMB, 2716 "reconnect v2 Persistent-id from reconnect = %llu\n", 2717 persistent_id); 2718 break; 2719 } 2720 case DURABLE_RECONN: 2721 { 2722 struct create_durable_reconn_req *recon; 2723 2724 if (dh_info->type == DURABLE_RECONN_V2 || 2725 dh_info->type == DURABLE_REQ_V2) { 2726 err = -EINVAL; 2727 goto out; 2728 } 2729 2730 recon = (struct create_durable_reconn_req *)context; 2731 persistent_id = recon->Data.Fid.PersistentFileId; 2732 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2733 if (!dh_info->fp) { 2734 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2735 err = -EBADF; 2736 goto out; 2737 } 2738 2739 dh_info->type = dh_idx; 2740 dh_info->reconnected = true; 2741 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", 2742 persistent_id); 2743 break; 2744 } 2745 case DURABLE_REQ_V2: 2746 { 2747 struct create_durable_req_v2 *durable_v2_blob; 2748 2749 if (dh_info->type == DURABLE_RECONN || 2750 dh_info->type == DURABLE_RECONN_V2) { 2751 err = -EINVAL; 2752 goto out; 2753 } 2754 2755 durable_v2_blob = 2756 (struct create_durable_req_v2 *)context; 2757 ksmbd_debug(SMB, "Request for durable v2 open\n"); 2758 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid); 2759 if (dh_info->fp) { 2760 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, 2761 SMB2_CLIENT_GUID_SIZE)) { 2762 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { 2763 err = -ENOEXEC; 2764 goto out; 2765 } 2766 2767 dh_info->fp->conn = conn; 2768 dh_info->reconnected = true; 2769 goto out; 2770 } 2771 } 2772 2773 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2774 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2775 dh_info->CreateGuid = 2776 durable_v2_blob->CreateGuid; 2777 dh_info->persistent = 2778 le32_to_cpu(durable_v2_blob->Flags); 2779 dh_info->timeout = 2780 le32_to_cpu(durable_v2_blob->Timeout); 2781 dh_info->type = dh_idx; 2782 } 2783 break; 2784 } 2785 case DURABLE_REQ: 2786 if (dh_info->type == DURABLE_RECONN) 2787 goto out; 2788 if (dh_info->type == DURABLE_RECONN_V2 || 2789 dh_info->type == DURABLE_REQ_V2) { 2790 err = -EINVAL; 2791 goto out; 2792 } 2793 2794 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2795 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2796 ksmbd_debug(SMB, "Request for durable open\n"); 2797 dh_info->type = dh_idx; 2798 } 2799 } 2800 } 2801 2802 out: 2803 return err; 2804 } 2805 2806 /** 2807 * smb2_open() - handler for smb file open request 2808 * @work: smb work containing request buffer 2809 * 2810 * Return: 0 on success, otherwise error 2811 */ 2812 int smb2_open(struct ksmbd_work *work) 2813 { 2814 struct ksmbd_conn *conn = work->conn; 2815 struct ksmbd_session *sess = work->sess; 2816 struct ksmbd_tree_connect *tcon = work->tcon; 2817 struct smb2_create_req *req; 2818 struct smb2_create_rsp *rsp; 2819 struct path path, parent_path; 2820 struct ksmbd_share_config *share = tcon->share_conf; 2821 struct ksmbd_file *fp = NULL; 2822 struct file *filp = NULL; 2823 struct mnt_idmap *idmap = NULL; 2824 struct kstat stat; 2825 struct create_context *context; 2826 struct lease_ctx_info *lc = NULL; 2827 struct create_ea_buf_req *ea_buf = NULL; 2828 struct oplock_info *opinfo; 2829 struct durable_info dh_info = {0}; 2830 __le32 *next_ptr = NULL; 2831 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2832 int rc = 0; 2833 int contxt_cnt = 0, query_disk_id = 0; 2834 int maximal_access_ctxt = 0, posix_ctxt = 0; 2835 int s_type = 0; 2836 int next_off = 0; 2837 char *name = NULL; 2838 char *stream_name = NULL; 2839 bool file_present = false, created = false, already_permitted = false; 2840 int share_ret, need_truncate = 0; 2841 u64 time; 2842 umode_t posix_mode = 0; 2843 __le32 daccess, maximal_access = 0; 2844 int iov_len = 0; 2845 2846 WORK_BUFFERS(work, req, rsp); 2847 2848 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2849 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2850 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2851 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2852 smb2_set_err_rsp(work); 2853 return -EINVAL; 2854 } 2855 2856 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2857 ksmbd_debug(SMB, "IPC pipe create request\n"); 2858 return create_smb2_pipe(work); 2859 } 2860 2861 if (req->NameLength) { 2862 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), 2863 le16_to_cpu(req->NameLength), 2864 work->conn->local_nls); 2865 if (IS_ERR(name)) { 2866 rc = PTR_ERR(name); 2867 name = NULL; 2868 goto err_out2; 2869 } 2870 2871 ksmbd_debug(SMB, "converted name = %s\n", name); 2872 if (strchr(name, ':')) { 2873 if (!test_share_config_flag(work->tcon->share_conf, 2874 KSMBD_SHARE_FLAG_STREAMS)) { 2875 rc = -EBADF; 2876 goto err_out2; 2877 } 2878 rc = parse_stream_name(name, &stream_name, &s_type); 2879 if (rc < 0) 2880 goto err_out2; 2881 } 2882 2883 rc = ksmbd_validate_filename(name); 2884 if (rc < 0) 2885 goto err_out2; 2886 2887 if (ksmbd_share_veto_filename(share, name)) { 2888 rc = -ENOENT; 2889 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2890 name); 2891 goto err_out2; 2892 } 2893 } else { 2894 name = kstrdup("", GFP_KERNEL); 2895 if (!name) { 2896 rc = -ENOMEM; 2897 goto err_out2; 2898 } 2899 } 2900 2901 req_op_level = req->RequestedOplockLevel; 2902 2903 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && 2904 req->CreateContextsOffset) { 2905 lc = parse_lease_state(req); 2906 rc = parse_durable_handle_context(work, req, lc, &dh_info); 2907 if (rc) { 2908 ksmbd_debug(SMB, "error parsing durable handle context\n"); 2909 goto err_out2; 2910 } 2911 2912 if (dh_info.reconnected == true) { 2913 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name); 2914 if (rc) { 2915 ksmbd_put_durable_fd(dh_info.fp); 2916 goto err_out2; 2917 } 2918 2919 rc = ksmbd_reopen_durable_fd(work, dh_info.fp); 2920 if (rc) { 2921 ksmbd_put_durable_fd(dh_info.fp); 2922 goto err_out2; 2923 } 2924 2925 if (ksmbd_override_fsids(work)) { 2926 rc = -ENOMEM; 2927 ksmbd_put_durable_fd(dh_info.fp); 2928 goto err_out2; 2929 } 2930 2931 fp = dh_info.fp; 2932 file_info = FILE_OPENED; 2933 2934 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); 2935 if (rc) 2936 goto err_out2; 2937 2938 ksmbd_put_durable_fd(fp); 2939 goto reconnected_fp; 2940 } 2941 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 2942 lc = parse_lease_state(req); 2943 2944 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 2945 pr_err("Invalid impersonationlevel : 0x%x\n", 2946 le32_to_cpu(req->ImpersonationLevel)); 2947 rc = -EIO; 2948 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 2949 goto err_out2; 2950 } 2951 2952 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 2953 pr_err("Invalid create options : 0x%x\n", 2954 le32_to_cpu(req->CreateOptions)); 2955 rc = -EINVAL; 2956 goto err_out2; 2957 } else { 2958 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 2959 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 2960 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 2961 2962 if (req->CreateOptions & 2963 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 2964 FILE_RESERVE_OPFILTER_LE)) { 2965 rc = -EOPNOTSUPP; 2966 goto err_out2; 2967 } 2968 2969 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2970 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 2971 rc = -EINVAL; 2972 goto err_out2; 2973 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 2974 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 2975 } 2976 } 2977 } 2978 2979 if (le32_to_cpu(req->CreateDisposition) > 2980 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 2981 pr_err("Invalid create disposition : 0x%x\n", 2982 le32_to_cpu(req->CreateDisposition)); 2983 rc = -EINVAL; 2984 goto err_out2; 2985 } 2986 2987 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 2988 pr_err("Invalid desired access : 0x%x\n", 2989 le32_to_cpu(req->DesiredAccess)); 2990 rc = -EACCES; 2991 goto err_out2; 2992 } 2993 2994 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 2995 pr_err("Invalid file attribute : 0x%x\n", 2996 le32_to_cpu(req->FileAttributes)); 2997 rc = -EINVAL; 2998 goto err_out2; 2999 } 3000 3001 if (req->CreateContextsOffset) { 3002 /* Parse non-durable handle create contexts */ 3003 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 3004 if (IS_ERR(context)) { 3005 rc = PTR_ERR(context); 3006 goto err_out2; 3007 } else if (context) { 3008 ea_buf = (struct create_ea_buf_req *)context; 3009 if (le16_to_cpu(context->DataOffset) + 3010 le32_to_cpu(context->DataLength) < 3011 sizeof(struct create_ea_buf_req)) { 3012 rc = -EINVAL; 3013 goto err_out2; 3014 } 3015 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 3016 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3017 rc = -EACCES; 3018 goto err_out2; 3019 } 3020 } 3021 3022 context = smb2_find_context_vals(req, 3023 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 3024 if (IS_ERR(context)) { 3025 rc = PTR_ERR(context); 3026 goto err_out2; 3027 } else if (context) { 3028 ksmbd_debug(SMB, 3029 "get query maximal access context\n"); 3030 maximal_access_ctxt = 1; 3031 } 3032 3033 context = smb2_find_context_vals(req, 3034 SMB2_CREATE_TIMEWARP_REQUEST, 4); 3035 if (IS_ERR(context)) { 3036 rc = PTR_ERR(context); 3037 goto err_out2; 3038 } else if (context) { 3039 ksmbd_debug(SMB, "get timewarp context\n"); 3040 rc = -EBADF; 3041 goto err_out2; 3042 } 3043 3044 if (tcon->posix_extensions) { 3045 context = smb2_find_context_vals(req, 3046 SMB2_CREATE_TAG_POSIX, 16); 3047 if (IS_ERR(context)) { 3048 rc = PTR_ERR(context); 3049 goto err_out2; 3050 } else if (context) { 3051 struct create_posix *posix = 3052 (struct create_posix *)context; 3053 if (le16_to_cpu(context->DataOffset) + 3054 le32_to_cpu(context->DataLength) < 3055 sizeof(struct create_posix) - 4) { 3056 rc = -EINVAL; 3057 goto err_out2; 3058 } 3059 ksmbd_debug(SMB, "get posix context\n"); 3060 3061 posix_mode = le32_to_cpu(posix->Mode); 3062 posix_ctxt = 1; 3063 } 3064 } 3065 } 3066 3067 if (ksmbd_override_fsids(work)) { 3068 rc = -ENOMEM; 3069 goto err_out2; 3070 } 3071 3072 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, 3073 &parent_path, &path, 1); 3074 if (!rc) { 3075 file_present = true; 3076 3077 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 3078 /* 3079 * If file exists with under flags, return access 3080 * denied error. 3081 */ 3082 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 3083 req->CreateDisposition == FILE_OPEN_IF_LE) { 3084 rc = -EACCES; 3085 goto err_out; 3086 } 3087 3088 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3089 ksmbd_debug(SMB, 3090 "User does not have write permission\n"); 3091 rc = -EACCES; 3092 goto err_out; 3093 } 3094 } else if (d_is_symlink(path.dentry)) { 3095 rc = -EACCES; 3096 goto err_out; 3097 } 3098 3099 idmap = mnt_idmap(path.mnt); 3100 } else { 3101 if (rc != -ENOENT) 3102 goto err_out; 3103 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 3104 name, rc); 3105 rc = 0; 3106 } 3107 3108 if (stream_name) { 3109 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3110 if (s_type == DATA_STREAM) { 3111 rc = -EIO; 3112 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3113 } 3114 } else { 3115 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 3116 s_type == DATA_STREAM) { 3117 rc = -EIO; 3118 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3119 } 3120 } 3121 3122 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 3123 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 3124 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3125 rc = -EIO; 3126 } 3127 3128 if (rc < 0) 3129 goto err_out; 3130 } 3131 3132 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 3133 S_ISDIR(d_inode(path.dentry)->i_mode) && 3134 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3135 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 3136 name, req->CreateOptions); 3137 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3138 rc = -EIO; 3139 goto err_out; 3140 } 3141 3142 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 3143 !(req->CreateDisposition == FILE_CREATE_LE) && 3144 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 3145 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3146 rc = -EIO; 3147 goto err_out; 3148 } 3149 3150 if (!stream_name && file_present && 3151 req->CreateDisposition == FILE_CREATE_LE) { 3152 rc = -EEXIST; 3153 goto err_out; 3154 } 3155 3156 daccess = smb_map_generic_desired_access(req->DesiredAccess); 3157 3158 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3159 rc = smb_check_perm_dacl(conn, &path, &daccess, 3160 sess->user->uid); 3161 if (rc) 3162 goto err_out; 3163 } 3164 3165 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 3166 if (!file_present) { 3167 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 3168 } else { 3169 ksmbd_vfs_query_maximal_access(idmap, 3170 path.dentry, 3171 &daccess); 3172 already_permitted = true; 3173 } 3174 maximal_access = daccess; 3175 } 3176 3177 open_flags = smb2_create_open_flags(file_present, daccess, 3178 req->CreateDisposition, 3179 &may_flags, 3180 req->CreateOptions & FILE_DIRECTORY_FILE_LE || 3181 (file_present && S_ISDIR(d_inode(path.dentry)->i_mode))); 3182 3183 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3184 if (open_flags & (O_CREAT | O_TRUNC)) { 3185 ksmbd_debug(SMB, 3186 "User does not have write permission\n"); 3187 rc = -EACCES; 3188 goto err_out; 3189 } 3190 } 3191 3192 /*create file if not present */ 3193 if (!file_present) { 3194 rc = smb2_creat(work, &parent_path, &path, name, open_flags, 3195 posix_mode, 3196 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 3197 if (rc) { 3198 if (rc == -ENOENT) { 3199 rc = -EIO; 3200 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 3201 } 3202 goto err_out; 3203 } 3204 3205 created = true; 3206 idmap = mnt_idmap(path.mnt); 3207 if (ea_buf) { 3208 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3209 sizeof(struct smb2_ea_info)) { 3210 rc = -EINVAL; 3211 goto err_out; 3212 } 3213 3214 rc = smb2_set_ea(&ea_buf->ea, 3215 le32_to_cpu(ea_buf->ccontext.DataLength), 3216 &path, false); 3217 if (rc == -EOPNOTSUPP) 3218 rc = 0; 3219 else if (rc) 3220 goto err_out; 3221 } 3222 } else if (!already_permitted) { 3223 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3224 * because execute(search) permission on a parent directory, 3225 * is already granted. 3226 */ 3227 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3228 rc = inode_permission(idmap, 3229 d_inode(path.dentry), 3230 may_flags); 3231 if (rc) 3232 goto err_out; 3233 3234 if ((daccess & FILE_DELETE_LE) || 3235 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3236 rc = inode_permission(idmap, 3237 d_inode(path.dentry->d_parent), 3238 MAY_EXEC | MAY_WRITE); 3239 if (rc) 3240 goto err_out; 3241 } 3242 } 3243 } 3244 3245 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3246 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3247 rc = -EBUSY; 3248 goto err_out; 3249 } 3250 3251 rc = 0; 3252 filp = dentry_open(&path, open_flags, current_cred()); 3253 if (IS_ERR(filp)) { 3254 rc = PTR_ERR(filp); 3255 pr_err("dentry open for dir failed, rc %d\n", rc); 3256 goto err_out; 3257 } 3258 3259 if (file_present) { 3260 if (!(open_flags & O_TRUNC)) 3261 file_info = FILE_OPENED; 3262 else 3263 file_info = FILE_OVERWRITTEN; 3264 3265 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3266 FILE_SUPERSEDE_LE) 3267 file_info = FILE_SUPERSEDED; 3268 } else if (open_flags & O_CREAT) { 3269 file_info = FILE_CREATED; 3270 } 3271 3272 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3273 3274 /* Obtain Volatile-ID */ 3275 fp = ksmbd_open_fd(work, filp); 3276 if (IS_ERR(fp)) { 3277 fput(filp); 3278 rc = PTR_ERR(fp); 3279 fp = NULL; 3280 goto err_out; 3281 } 3282 3283 /* Get Persistent-ID */ 3284 ksmbd_open_durable_fd(fp); 3285 if (!has_file_id(fp->persistent_id)) { 3286 rc = -ENOMEM; 3287 goto err_out; 3288 } 3289 3290 fp->cdoption = req->CreateDisposition; 3291 fp->daccess = daccess; 3292 fp->saccess = req->ShareAccess; 3293 fp->coption = req->CreateOptions; 3294 3295 /* Set default windows and posix acls if creating new file */ 3296 if (created) { 3297 int posix_acl_rc; 3298 struct inode *inode = d_inode(path.dentry); 3299 3300 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3301 &path, 3302 d_inode(path.dentry->d_parent)); 3303 if (posix_acl_rc) 3304 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3305 3306 if (test_share_config_flag(work->tcon->share_conf, 3307 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3308 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3309 sess->user->gid); 3310 } 3311 3312 if (rc) { 3313 rc = smb2_create_sd_buffer(work, req, &path); 3314 if (rc) { 3315 if (posix_acl_rc) 3316 ksmbd_vfs_set_init_posix_acl(idmap, 3317 &path); 3318 3319 if (test_share_config_flag(work->tcon->share_conf, 3320 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3321 struct smb_fattr fattr; 3322 struct smb_ntsd *pntsd; 3323 int pntsd_size, ace_num = 0; 3324 3325 ksmbd_acls_fattr(&fattr, idmap, inode); 3326 if (fattr.cf_acls) 3327 ace_num = fattr.cf_acls->a_count; 3328 if (fattr.cf_dacls) 3329 ace_num += fattr.cf_dacls->a_count; 3330 3331 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3332 sizeof(struct smb_sid) * 3 + 3333 sizeof(struct smb_acl) + 3334 sizeof(struct smb_ace) * ace_num * 2, 3335 GFP_KERNEL); 3336 if (!pntsd) { 3337 posix_acl_release(fattr.cf_acls); 3338 posix_acl_release(fattr.cf_dacls); 3339 goto err_out; 3340 } 3341 3342 rc = build_sec_desc(idmap, 3343 pntsd, NULL, 0, 3344 OWNER_SECINFO | 3345 GROUP_SECINFO | 3346 DACL_SECINFO, 3347 &pntsd_size, &fattr); 3348 posix_acl_release(fattr.cf_acls); 3349 posix_acl_release(fattr.cf_dacls); 3350 if (rc) { 3351 kfree(pntsd); 3352 goto err_out; 3353 } 3354 3355 rc = ksmbd_vfs_set_sd_xattr(conn, 3356 idmap, 3357 &path, 3358 pntsd, 3359 pntsd_size, 3360 false); 3361 kfree(pntsd); 3362 if (rc) 3363 pr_err("failed to store ntacl in xattr : %d\n", 3364 rc); 3365 } 3366 } 3367 } 3368 rc = 0; 3369 } 3370 3371 if (stream_name) { 3372 rc = smb2_set_stream_name_xattr(&path, 3373 fp, 3374 stream_name, 3375 s_type); 3376 if (rc) 3377 goto err_out; 3378 file_info = FILE_CREATED; 3379 } 3380 3381 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3382 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3383 3384 /* fp should be searchable through ksmbd_inode.m_fp_list 3385 * after daccess, saccess, attrib_only, and stream are 3386 * initialized. 3387 */ 3388 down_write(&fp->f_ci->m_lock); 3389 list_add(&fp->node, &fp->f_ci->m_fp_list); 3390 up_write(&fp->f_ci->m_lock); 3391 3392 /* Check delete pending among previous fp before oplock break */ 3393 if (ksmbd_inode_pending_delete(fp)) { 3394 rc = -EBUSY; 3395 goto err_out; 3396 } 3397 3398 if (file_present || created) 3399 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 3400 3401 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3402 !fp->attrib_only && !stream_name) { 3403 smb_break_all_oplock(work, fp); 3404 need_truncate = 1; 3405 } 3406 3407 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3408 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3409 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3410 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3411 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3412 rc = share_ret; 3413 goto err_out1; 3414 } 3415 } else { 3416 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { 3417 if (S_ISDIR(file_inode(filp)->i_mode)) { 3418 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; 3419 lc->is_dir = true; 3420 } 3421 3422 /* 3423 * Compare parent lease using parent key. If there is no 3424 * a lease that has same parent key, Send lease break 3425 * notification. 3426 */ 3427 smb_send_parent_lease_break_noti(fp, lc); 3428 3429 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3430 ksmbd_debug(SMB, 3431 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3432 name, req_op_level, lc->req_state); 3433 rc = find_same_lease_key(sess, fp->f_ci, lc); 3434 if (rc) 3435 goto err_out1; 3436 } else if (open_flags == O_RDONLY && 3437 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3438 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3439 req_op_level = SMB2_OPLOCK_LEVEL_II; 3440 3441 rc = smb_grant_oplock(work, req_op_level, 3442 fp->persistent_id, fp, 3443 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3444 lc, share_ret); 3445 if (rc < 0) 3446 goto err_out1; 3447 } 3448 3449 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3450 ksmbd_fd_set_delete_on_close(fp, file_info); 3451 3452 if (need_truncate) { 3453 rc = smb2_create_truncate(&fp->filp->f_path); 3454 if (rc) 3455 goto err_out1; 3456 } 3457 3458 if (req->CreateContextsOffset) { 3459 struct create_alloc_size_req *az_req; 3460 3461 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3462 SMB2_CREATE_ALLOCATION_SIZE, 4); 3463 if (IS_ERR(az_req)) { 3464 rc = PTR_ERR(az_req); 3465 goto err_out1; 3466 } else if (az_req) { 3467 loff_t alloc_size; 3468 int err; 3469 3470 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3471 le32_to_cpu(az_req->ccontext.DataLength) < 3472 sizeof(struct create_alloc_size_req)) { 3473 rc = -EINVAL; 3474 goto err_out1; 3475 } 3476 alloc_size = le64_to_cpu(az_req->AllocationSize); 3477 ksmbd_debug(SMB, 3478 "request smb2 create allocate size : %llu\n", 3479 alloc_size); 3480 smb_break_all_levII_oplock(work, fp, 1); 3481 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3482 alloc_size); 3483 if (err < 0) 3484 ksmbd_debug(SMB, 3485 "vfs_fallocate is failed : %d\n", 3486 err); 3487 } 3488 3489 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3490 if (IS_ERR(context)) { 3491 rc = PTR_ERR(context); 3492 goto err_out1; 3493 } else if (context) { 3494 ksmbd_debug(SMB, "get query on disk id context\n"); 3495 query_disk_id = 1; 3496 } 3497 } 3498 3499 rc = ksmbd_vfs_getattr(&path, &stat); 3500 if (rc) 3501 goto err_out1; 3502 3503 if (stat.result_mask & STATX_BTIME) 3504 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3505 else 3506 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3507 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3508 fp->f_ci->m_fattr = 3509 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3510 3511 if (!created) 3512 smb2_update_xattrs(tcon, &path, fp); 3513 else 3514 smb2_new_xattrs(tcon, &path, fp); 3515 3516 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3517 3518 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { 3519 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && 3520 test_share_config_flag(work->tcon->share_conf, 3521 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 3522 fp->is_persistent = true; 3523 else 3524 fp->is_durable = true; 3525 3526 if (dh_info.type == DURABLE_REQ_V2) { 3527 memcpy(fp->create_guid, dh_info.CreateGuid, 3528 SMB2_CREATE_GUID_SIZE); 3529 if (dh_info.timeout) 3530 fp->durable_timeout = min(dh_info.timeout, 3531 DURABLE_HANDLE_MAX_TIMEOUT); 3532 else 3533 fp->durable_timeout = 60; 3534 } 3535 } 3536 3537 reconnected_fp: 3538 rsp->StructureSize = cpu_to_le16(89); 3539 rcu_read_lock(); 3540 opinfo = rcu_dereference(fp->f_opinfo); 3541 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3542 rcu_read_unlock(); 3543 rsp->Flags = 0; 3544 rsp->CreateAction = cpu_to_le32(file_info); 3545 rsp->CreationTime = cpu_to_le64(fp->create_time); 3546 time = ksmbd_UnixTimeToNT(stat.atime); 3547 rsp->LastAccessTime = cpu_to_le64(time); 3548 time = ksmbd_UnixTimeToNT(stat.mtime); 3549 rsp->LastWriteTime = cpu_to_le64(time); 3550 time = ksmbd_UnixTimeToNT(stat.ctime); 3551 rsp->ChangeTime = cpu_to_le64(time); 3552 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3553 cpu_to_le64(stat.blocks << 9); 3554 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3555 rsp->FileAttributes = fp->f_ci->m_fattr; 3556 3557 rsp->Reserved2 = 0; 3558 3559 rsp->PersistentFileId = fp->persistent_id; 3560 rsp->VolatileFileId = fp->volatile_id; 3561 3562 rsp->CreateContextsOffset = 0; 3563 rsp->CreateContextsLength = 0; 3564 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3565 3566 /* If lease is request send lease context response */ 3567 if (opinfo && opinfo->is_lease) { 3568 struct create_context *lease_ccontext; 3569 3570 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3571 name, opinfo->o_lease->state); 3572 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3573 3574 lease_ccontext = (struct create_context *)rsp->Buffer; 3575 contxt_cnt++; 3576 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3577 le32_add_cpu(&rsp->CreateContextsLength, 3578 conn->vals->create_lease_size); 3579 iov_len += conn->vals->create_lease_size; 3580 next_ptr = &lease_ccontext->Next; 3581 next_off = conn->vals->create_lease_size; 3582 } 3583 3584 if (maximal_access_ctxt) { 3585 struct create_context *mxac_ccontext; 3586 3587 if (maximal_access == 0) 3588 ksmbd_vfs_query_maximal_access(idmap, 3589 path.dentry, 3590 &maximal_access); 3591 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3592 le32_to_cpu(rsp->CreateContextsLength)); 3593 contxt_cnt++; 3594 create_mxac_rsp_buf(rsp->Buffer + 3595 le32_to_cpu(rsp->CreateContextsLength), 3596 le32_to_cpu(maximal_access)); 3597 le32_add_cpu(&rsp->CreateContextsLength, 3598 conn->vals->create_mxac_size); 3599 iov_len += conn->vals->create_mxac_size; 3600 if (next_ptr) 3601 *next_ptr = cpu_to_le32(next_off); 3602 next_ptr = &mxac_ccontext->Next; 3603 next_off = conn->vals->create_mxac_size; 3604 } 3605 3606 if (query_disk_id) { 3607 struct create_context *disk_id_ccontext; 3608 3609 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3610 le32_to_cpu(rsp->CreateContextsLength)); 3611 contxt_cnt++; 3612 create_disk_id_rsp_buf(rsp->Buffer + 3613 le32_to_cpu(rsp->CreateContextsLength), 3614 stat.ino, tcon->id); 3615 le32_add_cpu(&rsp->CreateContextsLength, 3616 conn->vals->create_disk_id_size); 3617 iov_len += conn->vals->create_disk_id_size; 3618 if (next_ptr) 3619 *next_ptr = cpu_to_le32(next_off); 3620 next_ptr = &disk_id_ccontext->Next; 3621 next_off = conn->vals->create_disk_id_size; 3622 } 3623 3624 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { 3625 struct create_context *durable_ccontext; 3626 3627 durable_ccontext = (struct create_context *)(rsp->Buffer + 3628 le32_to_cpu(rsp->CreateContextsLength)); 3629 contxt_cnt++; 3630 if (dh_info.type == DURABLE_REQ) { 3631 create_durable_rsp_buf(rsp->Buffer + 3632 le32_to_cpu(rsp->CreateContextsLength)); 3633 le32_add_cpu(&rsp->CreateContextsLength, 3634 conn->vals->create_durable_size); 3635 iov_len += conn->vals->create_durable_size; 3636 } else { 3637 create_durable_v2_rsp_buf(rsp->Buffer + 3638 le32_to_cpu(rsp->CreateContextsLength), 3639 fp); 3640 le32_add_cpu(&rsp->CreateContextsLength, 3641 conn->vals->create_durable_v2_size); 3642 iov_len += conn->vals->create_durable_v2_size; 3643 } 3644 3645 if (next_ptr) 3646 *next_ptr = cpu_to_le32(next_off); 3647 next_ptr = &durable_ccontext->Next; 3648 next_off = conn->vals->create_durable_size; 3649 } 3650 3651 if (posix_ctxt) { 3652 contxt_cnt++; 3653 create_posix_rsp_buf(rsp->Buffer + 3654 le32_to_cpu(rsp->CreateContextsLength), 3655 fp); 3656 le32_add_cpu(&rsp->CreateContextsLength, 3657 conn->vals->create_posix_size); 3658 iov_len += conn->vals->create_posix_size; 3659 if (next_ptr) 3660 *next_ptr = cpu_to_le32(next_off); 3661 } 3662 3663 if (contxt_cnt > 0) { 3664 rsp->CreateContextsOffset = 3665 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3666 } 3667 3668 err_out: 3669 if (rc && (file_present || created)) 3670 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 3671 3672 err_out1: 3673 ksmbd_revert_fsids(work); 3674 3675 err_out2: 3676 if (!rc) { 3677 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3678 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3679 } 3680 if (rc) { 3681 if (rc == -EINVAL) 3682 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3683 else if (rc == -EOPNOTSUPP) 3684 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3685 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3686 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3687 else if (rc == -ENOENT) 3688 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3689 else if (rc == -EPERM) 3690 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3691 else if (rc == -EBUSY) 3692 rsp->hdr.Status = STATUS_DELETE_PENDING; 3693 else if (rc == -EBADF) 3694 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3695 else if (rc == -ENOEXEC) 3696 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3697 else if (rc == -ENXIO) 3698 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3699 else if (rc == -EEXIST) 3700 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3701 else if (rc == -EMFILE) 3702 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3703 if (!rsp->hdr.Status) 3704 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3705 3706 if (fp) 3707 ksmbd_fd_put(work, fp); 3708 smb2_set_err_rsp(work); 3709 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3710 } 3711 3712 kfree(name); 3713 kfree(lc); 3714 3715 return rc; 3716 } 3717 3718 static int readdir_info_level_struct_sz(int info_level) 3719 { 3720 switch (info_level) { 3721 case FILE_FULL_DIRECTORY_INFORMATION: 3722 return sizeof(struct file_full_directory_info); 3723 case FILE_BOTH_DIRECTORY_INFORMATION: 3724 return sizeof(struct file_both_directory_info); 3725 case FILE_DIRECTORY_INFORMATION: 3726 return sizeof(struct file_directory_info); 3727 case FILE_NAMES_INFORMATION: 3728 return sizeof(struct file_names_info); 3729 case FILEID_FULL_DIRECTORY_INFORMATION: 3730 return sizeof(struct file_id_full_dir_info); 3731 case FILEID_BOTH_DIRECTORY_INFORMATION: 3732 return sizeof(struct file_id_both_directory_info); 3733 case SMB_FIND_FILE_POSIX_INFO: 3734 return sizeof(struct smb2_posix_info); 3735 default: 3736 return -EOPNOTSUPP; 3737 } 3738 } 3739 3740 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3741 { 3742 switch (info_level) { 3743 case FILE_FULL_DIRECTORY_INFORMATION: 3744 { 3745 struct file_full_directory_info *ffdinfo; 3746 3747 ffdinfo = (struct file_full_directory_info *)d_info->rptr; 3748 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3749 d_info->name = ffdinfo->FileName; 3750 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3751 return 0; 3752 } 3753 case FILE_BOTH_DIRECTORY_INFORMATION: 3754 { 3755 struct file_both_directory_info *fbdinfo; 3756 3757 fbdinfo = (struct file_both_directory_info *)d_info->rptr; 3758 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3759 d_info->name = fbdinfo->FileName; 3760 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3761 return 0; 3762 } 3763 case FILE_DIRECTORY_INFORMATION: 3764 { 3765 struct file_directory_info *fdinfo; 3766 3767 fdinfo = (struct file_directory_info *)d_info->rptr; 3768 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3769 d_info->name = fdinfo->FileName; 3770 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3771 return 0; 3772 } 3773 case FILE_NAMES_INFORMATION: 3774 { 3775 struct file_names_info *fninfo; 3776 3777 fninfo = (struct file_names_info *)d_info->rptr; 3778 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3779 d_info->name = fninfo->FileName; 3780 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3781 return 0; 3782 } 3783 case FILEID_FULL_DIRECTORY_INFORMATION: 3784 { 3785 struct file_id_full_dir_info *dinfo; 3786 3787 dinfo = (struct file_id_full_dir_info *)d_info->rptr; 3788 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3789 d_info->name = dinfo->FileName; 3790 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3791 return 0; 3792 } 3793 case FILEID_BOTH_DIRECTORY_INFORMATION: 3794 { 3795 struct file_id_both_directory_info *fibdinfo; 3796 3797 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3798 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3799 d_info->name = fibdinfo->FileName; 3800 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3801 return 0; 3802 } 3803 case SMB_FIND_FILE_POSIX_INFO: 3804 { 3805 struct smb2_posix_info *posix_info; 3806 3807 posix_info = (struct smb2_posix_info *)d_info->rptr; 3808 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3809 d_info->name = posix_info->name; 3810 d_info->name_len = le32_to_cpu(posix_info->name_len); 3811 return 0; 3812 } 3813 default: 3814 return -EINVAL; 3815 } 3816 } 3817 3818 /** 3819 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3820 * buffer 3821 * @conn: connection instance 3822 * @info_level: smb information level 3823 * @d_info: structure included variables for query dir 3824 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3825 * 3826 * if directory has many entries, find first can't read it fully. 3827 * find next might be called multiple times to read remaining dir entries 3828 * 3829 * Return: 0 on success, otherwise error 3830 */ 3831 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3832 struct ksmbd_dir_info *d_info, 3833 struct ksmbd_kstat *ksmbd_kstat) 3834 { 3835 int next_entry_offset = 0; 3836 char *conv_name; 3837 int conv_len; 3838 void *kstat; 3839 int struct_sz, rc = 0; 3840 3841 conv_name = ksmbd_convert_dir_info_name(d_info, 3842 conn->local_nls, 3843 &conv_len); 3844 if (!conv_name) 3845 return -ENOMEM; 3846 3847 /* Somehow the name has only terminating NULL bytes */ 3848 if (conv_len < 0) { 3849 rc = -EINVAL; 3850 goto free_conv_name; 3851 } 3852 3853 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3854 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3855 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3856 3857 if (next_entry_offset > d_info->out_buf_len) { 3858 d_info->out_buf_len = 0; 3859 rc = -ENOSPC; 3860 goto free_conv_name; 3861 } 3862 3863 kstat = d_info->wptr; 3864 if (info_level != FILE_NAMES_INFORMATION) 3865 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3866 3867 switch (info_level) { 3868 case FILE_FULL_DIRECTORY_INFORMATION: 3869 { 3870 struct file_full_directory_info *ffdinfo; 3871 3872 ffdinfo = (struct file_full_directory_info *)kstat; 3873 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3874 ffdinfo->EaSize = 3875 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3876 if (ffdinfo->EaSize) 3877 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3878 if (d_info->hide_dot_file && d_info->name[0] == '.') 3879 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3880 memcpy(ffdinfo->FileName, conv_name, conv_len); 3881 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3882 break; 3883 } 3884 case FILE_BOTH_DIRECTORY_INFORMATION: 3885 { 3886 struct file_both_directory_info *fbdinfo; 3887 3888 fbdinfo = (struct file_both_directory_info *)kstat; 3889 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3890 fbdinfo->EaSize = 3891 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3892 if (fbdinfo->EaSize) 3893 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3894 fbdinfo->ShortNameLength = 0; 3895 fbdinfo->Reserved = 0; 3896 if (d_info->hide_dot_file && d_info->name[0] == '.') 3897 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3898 memcpy(fbdinfo->FileName, conv_name, conv_len); 3899 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3900 break; 3901 } 3902 case FILE_DIRECTORY_INFORMATION: 3903 { 3904 struct file_directory_info *fdinfo; 3905 3906 fdinfo = (struct file_directory_info *)kstat; 3907 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3908 if (d_info->hide_dot_file && d_info->name[0] == '.') 3909 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3910 memcpy(fdinfo->FileName, conv_name, conv_len); 3911 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3912 break; 3913 } 3914 case FILE_NAMES_INFORMATION: 3915 { 3916 struct file_names_info *fninfo; 3917 3918 fninfo = (struct file_names_info *)kstat; 3919 fninfo->FileNameLength = cpu_to_le32(conv_len); 3920 memcpy(fninfo->FileName, conv_name, conv_len); 3921 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3922 break; 3923 } 3924 case FILEID_FULL_DIRECTORY_INFORMATION: 3925 { 3926 struct file_id_full_dir_info *dinfo; 3927 3928 dinfo = (struct file_id_full_dir_info *)kstat; 3929 dinfo->FileNameLength = cpu_to_le32(conv_len); 3930 dinfo->EaSize = 3931 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3932 if (dinfo->EaSize) 3933 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3934 dinfo->Reserved = 0; 3935 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3936 if (d_info->hide_dot_file && d_info->name[0] == '.') 3937 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3938 memcpy(dinfo->FileName, conv_name, conv_len); 3939 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3940 break; 3941 } 3942 case FILEID_BOTH_DIRECTORY_INFORMATION: 3943 { 3944 struct file_id_both_directory_info *fibdinfo; 3945 3946 fibdinfo = (struct file_id_both_directory_info *)kstat; 3947 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 3948 fibdinfo->EaSize = 3949 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3950 if (fibdinfo->EaSize) 3951 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3952 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3953 fibdinfo->ShortNameLength = 0; 3954 fibdinfo->Reserved = 0; 3955 fibdinfo->Reserved2 = cpu_to_le16(0); 3956 if (d_info->hide_dot_file && d_info->name[0] == '.') 3957 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3958 memcpy(fibdinfo->FileName, conv_name, conv_len); 3959 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3960 break; 3961 } 3962 case SMB_FIND_FILE_POSIX_INFO: 3963 { 3964 struct smb2_posix_info *posix_info; 3965 u64 time; 3966 3967 posix_info = (struct smb2_posix_info *)kstat; 3968 posix_info->Ignored = 0; 3969 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 3970 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 3971 posix_info->ChangeTime = cpu_to_le64(time); 3972 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 3973 posix_info->LastAccessTime = cpu_to_le64(time); 3974 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 3975 posix_info->LastWriteTime = cpu_to_le64(time); 3976 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 3977 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 3978 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 3979 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 3980 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 3981 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 3982 posix_info->DosAttributes = 3983 S_ISDIR(ksmbd_kstat->kstat->mode) ? 3984 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 3985 if (d_info->hide_dot_file && d_info->name[0] == '.') 3986 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3987 /* 3988 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 3989 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 3990 * sub_auth(4 * 1(num_subauth)) + RID(4). 3991 */ 3992 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 3993 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 3994 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 3995 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 3996 memcpy(posix_info->name, conv_name, conv_len); 3997 posix_info->name_len = cpu_to_le32(conv_len); 3998 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 3999 break; 4000 } 4001 4002 } /* switch (info_level) */ 4003 4004 d_info->last_entry_offset = d_info->data_count; 4005 d_info->data_count += next_entry_offset; 4006 d_info->out_buf_len -= next_entry_offset; 4007 d_info->wptr += next_entry_offset; 4008 4009 ksmbd_debug(SMB, 4010 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 4011 info_level, d_info->out_buf_len, 4012 next_entry_offset, d_info->data_count); 4013 4014 free_conv_name: 4015 kfree(conv_name); 4016 return rc; 4017 } 4018 4019 struct smb2_query_dir_private { 4020 struct ksmbd_work *work; 4021 char *search_pattern; 4022 struct ksmbd_file *dir_fp; 4023 4024 struct ksmbd_dir_info *d_info; 4025 int info_level; 4026 }; 4027 4028 static void lock_dir(struct ksmbd_file *dir_fp) 4029 { 4030 struct dentry *dir = dir_fp->filp->f_path.dentry; 4031 4032 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); 4033 } 4034 4035 static void unlock_dir(struct ksmbd_file *dir_fp) 4036 { 4037 struct dentry *dir = dir_fp->filp->f_path.dentry; 4038 4039 inode_unlock(d_inode(dir)); 4040 } 4041 4042 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 4043 { 4044 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 4045 struct kstat kstat; 4046 struct ksmbd_kstat ksmbd_kstat; 4047 int rc; 4048 int i; 4049 4050 for (i = 0; i < priv->d_info->num_entry; i++) { 4051 struct dentry *dent; 4052 4053 if (dentry_name(priv->d_info, priv->info_level)) 4054 return -EINVAL; 4055 4056 lock_dir(priv->dir_fp); 4057 dent = lookup_one(idmap, priv->d_info->name, 4058 priv->dir_fp->filp->f_path.dentry, 4059 priv->d_info->name_len); 4060 unlock_dir(priv->dir_fp); 4061 4062 if (IS_ERR(dent)) { 4063 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 4064 priv->d_info->name, 4065 PTR_ERR(dent)); 4066 continue; 4067 } 4068 if (unlikely(d_is_negative(dent))) { 4069 dput(dent); 4070 ksmbd_debug(SMB, "Negative dentry `%s'\n", 4071 priv->d_info->name); 4072 continue; 4073 } 4074 4075 ksmbd_kstat.kstat = &kstat; 4076 if (priv->info_level != FILE_NAMES_INFORMATION) { 4077 rc = ksmbd_vfs_fill_dentry_attrs(priv->work, 4078 idmap, 4079 dent, 4080 &ksmbd_kstat); 4081 if (rc) { 4082 dput(dent); 4083 continue; 4084 } 4085 } 4086 4087 rc = smb2_populate_readdir_entry(priv->work->conn, 4088 priv->info_level, 4089 priv->d_info, 4090 &ksmbd_kstat); 4091 dput(dent); 4092 if (rc) 4093 return rc; 4094 } 4095 return 0; 4096 } 4097 4098 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 4099 int info_level) 4100 { 4101 int struct_sz; 4102 int conv_len; 4103 int next_entry_offset; 4104 4105 struct_sz = readdir_info_level_struct_sz(info_level); 4106 if (struct_sz == -EOPNOTSUPP) 4107 return -EOPNOTSUPP; 4108 4109 conv_len = (d_info->name_len + 1) * 2; 4110 next_entry_offset = ALIGN(struct_sz + conv_len, 4111 KSMBD_DIR_INFO_ALIGNMENT); 4112 4113 if (next_entry_offset > d_info->out_buf_len) { 4114 d_info->out_buf_len = 0; 4115 return -ENOSPC; 4116 } 4117 4118 switch (info_level) { 4119 case FILE_FULL_DIRECTORY_INFORMATION: 4120 { 4121 struct file_full_directory_info *ffdinfo; 4122 4123 ffdinfo = (struct file_full_directory_info *)d_info->wptr; 4124 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 4125 ffdinfo->FileName[d_info->name_len] = 0x00; 4126 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4127 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4128 break; 4129 } 4130 case FILE_BOTH_DIRECTORY_INFORMATION: 4131 { 4132 struct file_both_directory_info *fbdinfo; 4133 4134 fbdinfo = (struct file_both_directory_info *)d_info->wptr; 4135 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 4136 fbdinfo->FileName[d_info->name_len] = 0x00; 4137 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4138 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4139 break; 4140 } 4141 case FILE_DIRECTORY_INFORMATION: 4142 { 4143 struct file_directory_info *fdinfo; 4144 4145 fdinfo = (struct file_directory_info *)d_info->wptr; 4146 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 4147 fdinfo->FileName[d_info->name_len] = 0x00; 4148 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4149 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4150 break; 4151 } 4152 case FILE_NAMES_INFORMATION: 4153 { 4154 struct file_names_info *fninfo; 4155 4156 fninfo = (struct file_names_info *)d_info->wptr; 4157 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 4158 fninfo->FileName[d_info->name_len] = 0x00; 4159 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 4160 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4161 break; 4162 } 4163 case FILEID_FULL_DIRECTORY_INFORMATION: 4164 { 4165 struct file_id_full_dir_info *dinfo; 4166 4167 dinfo = (struct file_id_full_dir_info *)d_info->wptr; 4168 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 4169 dinfo->FileName[d_info->name_len] = 0x00; 4170 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4171 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4172 break; 4173 } 4174 case FILEID_BOTH_DIRECTORY_INFORMATION: 4175 { 4176 struct file_id_both_directory_info *fibdinfo; 4177 4178 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 4179 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 4180 fibdinfo->FileName[d_info->name_len] = 0x00; 4181 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4182 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4183 break; 4184 } 4185 case SMB_FIND_FILE_POSIX_INFO: 4186 { 4187 struct smb2_posix_info *posix_info; 4188 4189 posix_info = (struct smb2_posix_info *)d_info->wptr; 4190 memcpy(posix_info->name, d_info->name, d_info->name_len); 4191 posix_info->name[d_info->name_len] = 0x00; 4192 posix_info->name_len = cpu_to_le32(d_info->name_len); 4193 posix_info->NextEntryOffset = 4194 cpu_to_le32(next_entry_offset); 4195 break; 4196 } 4197 } /* switch (info_level) */ 4198 4199 d_info->num_entry++; 4200 d_info->out_buf_len -= next_entry_offset; 4201 d_info->wptr += next_entry_offset; 4202 return 0; 4203 } 4204 4205 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 4206 loff_t offset, u64 ino, unsigned int d_type) 4207 { 4208 struct ksmbd_readdir_data *buf; 4209 struct smb2_query_dir_private *priv; 4210 struct ksmbd_dir_info *d_info; 4211 int rc; 4212 4213 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 4214 priv = buf->private; 4215 d_info = priv->d_info; 4216 4217 /* dot and dotdot entries are already reserved */ 4218 if (!strcmp(".", name) || !strcmp("..", name)) 4219 return true; 4220 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 4221 return true; 4222 if (!match_pattern(name, namlen, priv->search_pattern)) 4223 return true; 4224 4225 d_info->name = name; 4226 d_info->name_len = namlen; 4227 rc = reserve_populate_dentry(d_info, priv->info_level); 4228 if (rc) 4229 return false; 4230 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 4231 d_info->out_buf_len = 0; 4232 return true; 4233 } 4234 4235 static int verify_info_level(int info_level) 4236 { 4237 switch (info_level) { 4238 case FILE_FULL_DIRECTORY_INFORMATION: 4239 case FILE_BOTH_DIRECTORY_INFORMATION: 4240 case FILE_DIRECTORY_INFORMATION: 4241 case FILE_NAMES_INFORMATION: 4242 case FILEID_FULL_DIRECTORY_INFORMATION: 4243 case FILEID_BOTH_DIRECTORY_INFORMATION: 4244 case SMB_FIND_FILE_POSIX_INFO: 4245 break; 4246 default: 4247 return -EOPNOTSUPP; 4248 } 4249 4250 return 0; 4251 } 4252 4253 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4254 { 4255 int free_len; 4256 4257 free_len = (int)(work->response_sz - 4258 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4259 return free_len; 4260 } 4261 4262 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4263 unsigned short hdr2_len, 4264 unsigned int out_buf_len) 4265 { 4266 int free_len; 4267 4268 if (out_buf_len > work->conn->vals->max_trans_size) 4269 return -EINVAL; 4270 4271 free_len = smb2_resp_buf_len(work, hdr2_len); 4272 if (free_len < 0) 4273 return -EINVAL; 4274 4275 return min_t(int, out_buf_len, free_len); 4276 } 4277 4278 int smb2_query_dir(struct ksmbd_work *work) 4279 { 4280 struct ksmbd_conn *conn = work->conn; 4281 struct smb2_query_directory_req *req; 4282 struct smb2_query_directory_rsp *rsp; 4283 struct ksmbd_share_config *share = work->tcon->share_conf; 4284 struct ksmbd_file *dir_fp = NULL; 4285 struct ksmbd_dir_info d_info; 4286 int rc = 0; 4287 char *srch_ptr = NULL; 4288 unsigned char srch_flag; 4289 int buffer_sz; 4290 struct smb2_query_dir_private query_dir_private = {NULL, }; 4291 4292 WORK_BUFFERS(work, req, rsp); 4293 4294 if (ksmbd_override_fsids(work)) { 4295 rsp->hdr.Status = STATUS_NO_MEMORY; 4296 smb2_set_err_rsp(work); 4297 return -ENOMEM; 4298 } 4299 4300 rc = verify_info_level(req->FileInformationClass); 4301 if (rc) { 4302 rc = -EFAULT; 4303 goto err_out2; 4304 } 4305 4306 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4307 if (!dir_fp) { 4308 rc = -EBADF; 4309 goto err_out2; 4310 } 4311 4312 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4313 inode_permission(file_mnt_idmap(dir_fp->filp), 4314 file_inode(dir_fp->filp), 4315 MAY_READ | MAY_EXEC)) { 4316 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4317 rc = -EACCES; 4318 goto err_out2; 4319 } 4320 4321 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4322 pr_err("can't do query dir for a file\n"); 4323 rc = -EINVAL; 4324 goto err_out2; 4325 } 4326 4327 srch_flag = req->Flags; 4328 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), 4329 le16_to_cpu(req->FileNameLength), 1, 4330 conn->local_nls); 4331 if (IS_ERR(srch_ptr)) { 4332 ksmbd_debug(SMB, "Search Pattern not found\n"); 4333 rc = -EINVAL; 4334 goto err_out2; 4335 } else { 4336 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4337 } 4338 4339 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4340 ksmbd_debug(SMB, "Restart directory scan\n"); 4341 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4342 } 4343 4344 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4345 d_info.wptr = (char *)rsp->Buffer; 4346 d_info.rptr = (char *)rsp->Buffer; 4347 d_info.out_buf_len = 4348 smb2_calc_max_out_buf_len(work, 8, 4349 le32_to_cpu(req->OutputBufferLength)); 4350 if (d_info.out_buf_len < 0) { 4351 rc = -EINVAL; 4352 goto err_out; 4353 } 4354 d_info.flags = srch_flag; 4355 4356 /* 4357 * reserve dot and dotdot entries in head of buffer 4358 * in first response 4359 */ 4360 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4361 dir_fp, &d_info, srch_ptr, 4362 smb2_populate_readdir_entry); 4363 if (rc == -ENOSPC) 4364 rc = 0; 4365 else if (rc) 4366 goto err_out; 4367 4368 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4369 d_info.hide_dot_file = true; 4370 4371 buffer_sz = d_info.out_buf_len; 4372 d_info.rptr = d_info.wptr; 4373 query_dir_private.work = work; 4374 query_dir_private.search_pattern = srch_ptr; 4375 query_dir_private.dir_fp = dir_fp; 4376 query_dir_private.d_info = &d_info; 4377 query_dir_private.info_level = req->FileInformationClass; 4378 dir_fp->readdir_data.private = &query_dir_private; 4379 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4380 4381 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4382 /* 4383 * req->OutputBufferLength is too small to contain even one entry. 4384 * In this case, it immediately returns OutputBufferLength 0 to client. 4385 */ 4386 if (!d_info.out_buf_len && !d_info.num_entry) 4387 goto no_buf_len; 4388 if (rc > 0 || rc == -ENOSPC) 4389 rc = 0; 4390 else if (rc) 4391 goto err_out; 4392 4393 d_info.wptr = d_info.rptr; 4394 d_info.out_buf_len = buffer_sz; 4395 rc = process_query_dir_entries(&query_dir_private); 4396 if (rc) 4397 goto err_out; 4398 4399 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4400 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4401 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4402 } else { 4403 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4404 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4405 } 4406 rsp->StructureSize = cpu_to_le16(9); 4407 rsp->OutputBufferOffset = cpu_to_le16(0); 4408 rsp->OutputBufferLength = cpu_to_le32(0); 4409 rsp->Buffer[0] = 0; 4410 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4411 offsetof(struct smb2_query_directory_rsp, Buffer) 4412 + 1); 4413 if (rc) 4414 goto err_out; 4415 } else { 4416 no_buf_len: 4417 ((struct file_directory_info *) 4418 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4419 ->NextEntryOffset = 0; 4420 if (d_info.data_count >= d_info.last_entry_off_align) 4421 d_info.data_count -= d_info.last_entry_off_align; 4422 4423 rsp->StructureSize = cpu_to_le16(9); 4424 rsp->OutputBufferOffset = cpu_to_le16(72); 4425 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4426 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4427 offsetof(struct smb2_query_directory_rsp, Buffer) + 4428 d_info.data_count); 4429 if (rc) 4430 goto err_out; 4431 } 4432 4433 kfree(srch_ptr); 4434 ksmbd_fd_put(work, dir_fp); 4435 ksmbd_revert_fsids(work); 4436 return 0; 4437 4438 err_out: 4439 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4440 kfree(srch_ptr); 4441 4442 err_out2: 4443 if (rc == -EINVAL) 4444 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4445 else if (rc == -EACCES) 4446 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4447 else if (rc == -ENOENT) 4448 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4449 else if (rc == -EBADF) 4450 rsp->hdr.Status = STATUS_FILE_CLOSED; 4451 else if (rc == -ENOMEM) 4452 rsp->hdr.Status = STATUS_NO_MEMORY; 4453 else if (rc == -EFAULT) 4454 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4455 else if (rc == -EIO) 4456 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4457 if (!rsp->hdr.Status) 4458 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4459 4460 smb2_set_err_rsp(work); 4461 ksmbd_fd_put(work, dir_fp); 4462 ksmbd_revert_fsids(work); 4463 return 0; 4464 } 4465 4466 /** 4467 * buffer_check_err() - helper function to check buffer errors 4468 * @reqOutputBufferLength: max buffer length expected in command response 4469 * @rsp: query info response buffer contains output buffer length 4470 * @rsp_org: base response buffer pointer in case of chained response 4471 * 4472 * Return: 0 on success, otherwise error 4473 */ 4474 static int buffer_check_err(int reqOutputBufferLength, 4475 struct smb2_query_info_rsp *rsp, 4476 void *rsp_org) 4477 { 4478 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4479 pr_err("Invalid Buffer Size Requested\n"); 4480 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4481 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4482 return -EINVAL; 4483 } 4484 return 0; 4485 } 4486 4487 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4488 void *rsp_org) 4489 { 4490 struct smb2_file_standard_info *sinfo; 4491 4492 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4493 4494 sinfo->AllocationSize = cpu_to_le64(4096); 4495 sinfo->EndOfFile = cpu_to_le64(0); 4496 sinfo->NumberOfLinks = cpu_to_le32(1); 4497 sinfo->DeletePending = 1; 4498 sinfo->Directory = 0; 4499 rsp->OutputBufferLength = 4500 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4501 } 4502 4503 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4504 void *rsp_org) 4505 { 4506 struct smb2_file_internal_info *file_info; 4507 4508 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4509 4510 /* any unique number */ 4511 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4512 rsp->OutputBufferLength = 4513 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4514 } 4515 4516 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4517 struct smb2_query_info_req *req, 4518 struct smb2_query_info_rsp *rsp, 4519 void *rsp_org) 4520 { 4521 u64 id; 4522 int rc; 4523 4524 /* 4525 * Windows can sometime send query file info request on 4526 * pipe without opening it, checking error condition here 4527 */ 4528 id = req->VolatileFileId; 4529 if (!ksmbd_session_rpc_method(sess, id)) 4530 return -ENOENT; 4531 4532 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4533 req->FileInfoClass, req->VolatileFileId); 4534 4535 switch (req->FileInfoClass) { 4536 case FILE_STANDARD_INFORMATION: 4537 get_standard_info_pipe(rsp, rsp_org); 4538 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4539 rsp, rsp_org); 4540 break; 4541 case FILE_INTERNAL_INFORMATION: 4542 get_internal_info_pipe(rsp, id, rsp_org); 4543 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4544 rsp, rsp_org); 4545 break; 4546 default: 4547 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4548 req->FileInfoClass); 4549 rc = -EOPNOTSUPP; 4550 } 4551 return rc; 4552 } 4553 4554 /** 4555 * smb2_get_ea() - handler for smb2 get extended attribute command 4556 * @work: smb work containing query info command buffer 4557 * @fp: ksmbd_file pointer 4558 * @req: get extended attribute request 4559 * @rsp: response buffer pointer 4560 * @rsp_org: base response buffer pointer in case of chained response 4561 * 4562 * Return: 0 on success, otherwise error 4563 */ 4564 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4565 struct smb2_query_info_req *req, 4566 struct smb2_query_info_rsp *rsp, void *rsp_org) 4567 { 4568 struct smb2_ea_info *eainfo, *prev_eainfo; 4569 char *name, *ptr, *xattr_list = NULL, *buf; 4570 int rc, name_len, value_len, xattr_list_len, idx; 4571 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4572 struct smb2_ea_info_req *ea_req = NULL; 4573 const struct path *path; 4574 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4575 4576 if (!(fp->daccess & FILE_READ_EA_LE)) { 4577 pr_err("Not permitted to read ext attr : 0x%x\n", 4578 fp->daccess); 4579 return -EACCES; 4580 } 4581 4582 path = &fp->filp->f_path; 4583 /* single EA entry is requested with given user.* name */ 4584 if (req->InputBufferLength) { 4585 if (le32_to_cpu(req->InputBufferLength) < 4586 sizeof(struct smb2_ea_info_req)) 4587 return -EINVAL; 4588 4589 ea_req = (struct smb2_ea_info_req *)((char *)req + 4590 le16_to_cpu(req->InputBufferOffset)); 4591 } else { 4592 /* need to send all EAs, if no specific EA is requested*/ 4593 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4594 ksmbd_debug(SMB, 4595 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4596 le32_to_cpu(req->Flags)); 4597 } 4598 4599 buf_free_len = 4600 smb2_calc_max_out_buf_len(work, 8, 4601 le32_to_cpu(req->OutputBufferLength)); 4602 if (buf_free_len < 0) 4603 return -EINVAL; 4604 4605 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4606 if (rc < 0) { 4607 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4608 goto out; 4609 } else if (!rc) { /* there is no EA in the file */ 4610 ksmbd_debug(SMB, "no ea data in the file\n"); 4611 goto done; 4612 } 4613 xattr_list_len = rc; 4614 4615 ptr = (char *)rsp->Buffer; 4616 eainfo = (struct smb2_ea_info *)ptr; 4617 prev_eainfo = eainfo; 4618 idx = 0; 4619 4620 while (idx < xattr_list_len) { 4621 name = xattr_list + idx; 4622 name_len = strlen(name); 4623 4624 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4625 idx += name_len + 1; 4626 4627 /* 4628 * CIFS does not support EA other than user.* namespace, 4629 * still keep the framework generic, to list other attrs 4630 * in future. 4631 */ 4632 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4633 continue; 4634 4635 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4636 STREAM_PREFIX_LEN)) 4637 continue; 4638 4639 if (req->InputBufferLength && 4640 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4641 ea_req->EaNameLength)) 4642 continue; 4643 4644 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4645 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4646 continue; 4647 4648 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4649 name_len -= XATTR_USER_PREFIX_LEN; 4650 4651 ptr = eainfo->name + name_len + 1; 4652 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4653 name_len + 1); 4654 /* bailout if xattr can't fit in buf_free_len */ 4655 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4656 name, &buf); 4657 if (value_len <= 0) { 4658 rc = -ENOENT; 4659 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4660 goto out; 4661 } 4662 4663 buf_free_len -= value_len; 4664 if (buf_free_len < 0) { 4665 kfree(buf); 4666 break; 4667 } 4668 4669 memcpy(ptr, buf, value_len); 4670 kfree(buf); 4671 4672 ptr += value_len; 4673 eainfo->Flags = 0; 4674 eainfo->EaNameLength = name_len; 4675 4676 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4677 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4678 name_len); 4679 else 4680 memcpy(eainfo->name, name, name_len); 4681 4682 eainfo->name[name_len] = '\0'; 4683 eainfo->EaValueLength = cpu_to_le16(value_len); 4684 next_offset = offsetof(struct smb2_ea_info, name) + 4685 name_len + 1 + value_len; 4686 4687 /* align next xattr entry at 4 byte bundary */ 4688 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4689 if (alignment_bytes) { 4690 memset(ptr, '\0', alignment_bytes); 4691 ptr += alignment_bytes; 4692 next_offset += alignment_bytes; 4693 buf_free_len -= alignment_bytes; 4694 } 4695 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4696 prev_eainfo = eainfo; 4697 eainfo = (struct smb2_ea_info *)ptr; 4698 rsp_data_cnt += next_offset; 4699 4700 if (req->InputBufferLength) { 4701 ksmbd_debug(SMB, "single entry requested\n"); 4702 break; 4703 } 4704 } 4705 4706 /* no more ea entries */ 4707 prev_eainfo->NextEntryOffset = 0; 4708 done: 4709 rc = 0; 4710 if (rsp_data_cnt == 0) 4711 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4712 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4713 out: 4714 kvfree(xattr_list); 4715 return rc; 4716 } 4717 4718 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4719 struct ksmbd_file *fp, void *rsp_org) 4720 { 4721 struct smb2_file_access_info *file_info; 4722 4723 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4724 file_info->AccessFlags = fp->daccess; 4725 rsp->OutputBufferLength = 4726 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4727 } 4728 4729 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4730 struct ksmbd_file *fp, void *rsp_org) 4731 { 4732 struct smb2_file_basic_info *basic_info; 4733 struct kstat stat; 4734 u64 time; 4735 int ret; 4736 4737 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4738 pr_err("no right to read the attributes : 0x%x\n", 4739 fp->daccess); 4740 return -EACCES; 4741 } 4742 4743 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4744 AT_STATX_SYNC_AS_STAT); 4745 if (ret) 4746 return ret; 4747 4748 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4749 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4750 time = ksmbd_UnixTimeToNT(stat.atime); 4751 basic_info->LastAccessTime = cpu_to_le64(time); 4752 time = ksmbd_UnixTimeToNT(stat.mtime); 4753 basic_info->LastWriteTime = cpu_to_le64(time); 4754 time = ksmbd_UnixTimeToNT(stat.ctime); 4755 basic_info->ChangeTime = cpu_to_le64(time); 4756 basic_info->Attributes = fp->f_ci->m_fattr; 4757 basic_info->Pad1 = 0; 4758 rsp->OutputBufferLength = 4759 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4760 return 0; 4761 } 4762 4763 static int get_file_standard_info(struct smb2_query_info_rsp *rsp, 4764 struct ksmbd_file *fp, void *rsp_org) 4765 { 4766 struct smb2_file_standard_info *sinfo; 4767 unsigned int delete_pending; 4768 struct kstat stat; 4769 int ret; 4770 4771 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4772 AT_STATX_SYNC_AS_STAT); 4773 if (ret) 4774 return ret; 4775 4776 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4777 delete_pending = ksmbd_inode_pending_delete(fp); 4778 4779 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); 4780 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4781 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4782 sinfo->DeletePending = delete_pending; 4783 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4784 rsp->OutputBufferLength = 4785 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4786 4787 return 0; 4788 } 4789 4790 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4791 void *rsp_org) 4792 { 4793 struct smb2_file_alignment_info *file_info; 4794 4795 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4796 file_info->AlignmentRequirement = 0; 4797 rsp->OutputBufferLength = 4798 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4799 } 4800 4801 static int get_file_all_info(struct ksmbd_work *work, 4802 struct smb2_query_info_rsp *rsp, 4803 struct ksmbd_file *fp, 4804 void *rsp_org) 4805 { 4806 struct ksmbd_conn *conn = work->conn; 4807 struct smb2_file_all_info *file_info; 4808 unsigned int delete_pending; 4809 struct kstat stat; 4810 int conv_len; 4811 char *filename; 4812 u64 time; 4813 int ret; 4814 4815 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4816 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4817 fp->daccess); 4818 return -EACCES; 4819 } 4820 4821 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4822 if (IS_ERR(filename)) 4823 return PTR_ERR(filename); 4824 4825 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4826 AT_STATX_SYNC_AS_STAT); 4827 if (ret) 4828 return ret; 4829 4830 ksmbd_debug(SMB, "filename = %s\n", filename); 4831 delete_pending = ksmbd_inode_pending_delete(fp); 4832 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4833 4834 file_info->CreationTime = cpu_to_le64(fp->create_time); 4835 time = ksmbd_UnixTimeToNT(stat.atime); 4836 file_info->LastAccessTime = cpu_to_le64(time); 4837 time = ksmbd_UnixTimeToNT(stat.mtime); 4838 file_info->LastWriteTime = cpu_to_le64(time); 4839 time = ksmbd_UnixTimeToNT(stat.ctime); 4840 file_info->ChangeTime = cpu_to_le64(time); 4841 file_info->Attributes = fp->f_ci->m_fattr; 4842 file_info->Pad1 = 0; 4843 file_info->AllocationSize = 4844 cpu_to_le64(stat.blocks << 9); 4845 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4846 file_info->NumberOfLinks = 4847 cpu_to_le32(get_nlink(&stat) - delete_pending); 4848 file_info->DeletePending = delete_pending; 4849 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4850 file_info->Pad2 = 0; 4851 file_info->IndexNumber = cpu_to_le64(stat.ino); 4852 file_info->EASize = 0; 4853 file_info->AccessFlags = fp->daccess; 4854 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4855 file_info->Mode = fp->coption; 4856 file_info->AlignmentRequirement = 0; 4857 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4858 PATH_MAX, conn->local_nls, 0); 4859 conv_len *= 2; 4860 file_info->FileNameLength = cpu_to_le32(conv_len); 4861 rsp->OutputBufferLength = 4862 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4863 kfree(filename); 4864 return 0; 4865 } 4866 4867 static void get_file_alternate_info(struct ksmbd_work *work, 4868 struct smb2_query_info_rsp *rsp, 4869 struct ksmbd_file *fp, 4870 void *rsp_org) 4871 { 4872 struct ksmbd_conn *conn = work->conn; 4873 struct smb2_file_alt_name_info *file_info; 4874 struct dentry *dentry = fp->filp->f_path.dentry; 4875 int conv_len; 4876 4877 spin_lock(&dentry->d_lock); 4878 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 4879 conv_len = ksmbd_extract_shortname(conn, 4880 dentry->d_name.name, 4881 file_info->FileName); 4882 spin_unlock(&dentry->d_lock); 4883 file_info->FileNameLength = cpu_to_le32(conv_len); 4884 rsp->OutputBufferLength = 4885 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); 4886 } 4887 4888 static int get_file_stream_info(struct ksmbd_work *work, 4889 struct smb2_query_info_rsp *rsp, 4890 struct ksmbd_file *fp, 4891 void *rsp_org) 4892 { 4893 struct ksmbd_conn *conn = work->conn; 4894 struct smb2_file_stream_info *file_info; 4895 char *stream_name, *xattr_list = NULL, *stream_buf; 4896 struct kstat stat; 4897 const struct path *path = &fp->filp->f_path; 4898 ssize_t xattr_list_len; 4899 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 4900 int buf_free_len; 4901 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4902 int ret; 4903 4904 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4905 AT_STATX_SYNC_AS_STAT); 4906 if (ret) 4907 return ret; 4908 4909 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 4910 4911 buf_free_len = 4912 smb2_calc_max_out_buf_len(work, 8, 4913 le32_to_cpu(req->OutputBufferLength)); 4914 if (buf_free_len < 0) 4915 goto out; 4916 4917 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4918 if (xattr_list_len < 0) { 4919 goto out; 4920 } else if (!xattr_list_len) { 4921 ksmbd_debug(SMB, "empty xattr in the file\n"); 4922 goto out; 4923 } 4924 4925 while (idx < xattr_list_len) { 4926 stream_name = xattr_list + idx; 4927 streamlen = strlen(stream_name); 4928 idx += streamlen + 1; 4929 4930 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 4931 4932 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 4933 STREAM_PREFIX, STREAM_PREFIX_LEN)) 4934 continue; 4935 4936 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 4937 STREAM_PREFIX_LEN); 4938 streamlen = stream_name_len; 4939 4940 /* plus : size */ 4941 streamlen += 1; 4942 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); 4943 if (!stream_buf) 4944 break; 4945 4946 streamlen = snprintf(stream_buf, streamlen + 1, 4947 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 4948 4949 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 4950 if (next > buf_free_len) { 4951 kfree(stream_buf); 4952 break; 4953 } 4954 4955 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 4956 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4957 stream_buf, streamlen, 4958 conn->local_nls, 0); 4959 streamlen *= 2; 4960 kfree(stream_buf); 4961 file_info->StreamNameLength = cpu_to_le32(streamlen); 4962 file_info->StreamSize = cpu_to_le64(stream_name_len); 4963 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 4964 4965 nbytes += next; 4966 buf_free_len -= next; 4967 file_info->NextEntryOffset = cpu_to_le32(next); 4968 } 4969 4970 out: 4971 if (!S_ISDIR(stat.mode) && 4972 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 4973 file_info = (struct smb2_file_stream_info *) 4974 &rsp->Buffer[nbytes]; 4975 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4976 "::$DATA", 7, conn->local_nls, 0); 4977 streamlen *= 2; 4978 file_info->StreamNameLength = cpu_to_le32(streamlen); 4979 file_info->StreamSize = cpu_to_le64(stat.size); 4980 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 4981 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 4982 } 4983 4984 /* last entry offset should be 0 */ 4985 file_info->NextEntryOffset = 0; 4986 kvfree(xattr_list); 4987 4988 rsp->OutputBufferLength = cpu_to_le32(nbytes); 4989 4990 return 0; 4991 } 4992 4993 static int get_file_internal_info(struct smb2_query_info_rsp *rsp, 4994 struct ksmbd_file *fp, void *rsp_org) 4995 { 4996 struct smb2_file_internal_info *file_info; 4997 struct kstat stat; 4998 int ret; 4999 5000 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5001 AT_STATX_SYNC_AS_STAT); 5002 if (ret) 5003 return ret; 5004 5005 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 5006 file_info->IndexNumber = cpu_to_le64(stat.ino); 5007 rsp->OutputBufferLength = 5008 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 5009 5010 return 0; 5011 } 5012 5013 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 5014 struct ksmbd_file *fp, void *rsp_org) 5015 { 5016 struct smb2_file_ntwrk_info *file_info; 5017 struct kstat stat; 5018 u64 time; 5019 int ret; 5020 5021 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5022 pr_err("no right to read the attributes : 0x%x\n", 5023 fp->daccess); 5024 return -EACCES; 5025 } 5026 5027 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5028 AT_STATX_SYNC_AS_STAT); 5029 if (ret) 5030 return ret; 5031 5032 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; 5033 5034 file_info->CreationTime = cpu_to_le64(fp->create_time); 5035 time = ksmbd_UnixTimeToNT(stat.atime); 5036 file_info->LastAccessTime = cpu_to_le64(time); 5037 time = ksmbd_UnixTimeToNT(stat.mtime); 5038 file_info->LastWriteTime = cpu_to_le64(time); 5039 time = ksmbd_UnixTimeToNT(stat.ctime); 5040 file_info->ChangeTime = cpu_to_le64(time); 5041 file_info->Attributes = fp->f_ci->m_fattr; 5042 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5043 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5044 file_info->Reserved = cpu_to_le32(0); 5045 rsp->OutputBufferLength = 5046 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); 5047 return 0; 5048 } 5049 5050 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 5051 { 5052 struct smb2_file_ea_info *file_info; 5053 5054 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 5055 file_info->EASize = 0; 5056 rsp->OutputBufferLength = 5057 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 5058 } 5059 5060 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 5061 struct ksmbd_file *fp, void *rsp_org) 5062 { 5063 struct smb2_file_pos_info *file_info; 5064 5065 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 5066 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5067 rsp->OutputBufferLength = 5068 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 5069 } 5070 5071 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 5072 struct ksmbd_file *fp, void *rsp_org) 5073 { 5074 struct smb2_file_mode_info *file_info; 5075 5076 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 5077 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 5078 rsp->OutputBufferLength = 5079 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 5080 } 5081 5082 static int get_file_compression_info(struct smb2_query_info_rsp *rsp, 5083 struct ksmbd_file *fp, void *rsp_org) 5084 { 5085 struct smb2_file_comp_info *file_info; 5086 struct kstat stat; 5087 int ret; 5088 5089 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5090 AT_STATX_SYNC_AS_STAT); 5091 if (ret) 5092 return ret; 5093 5094 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 5095 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 5096 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 5097 file_info->CompressionUnitShift = 0; 5098 file_info->ChunkShift = 0; 5099 file_info->ClusterShift = 0; 5100 memset(&file_info->Reserved[0], 0, 3); 5101 5102 rsp->OutputBufferLength = 5103 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 5104 5105 return 0; 5106 } 5107 5108 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 5109 struct ksmbd_file *fp, void *rsp_org) 5110 { 5111 struct smb2_file_attr_tag_info *file_info; 5112 5113 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5114 pr_err("no right to read the attributes : 0x%x\n", 5115 fp->daccess); 5116 return -EACCES; 5117 } 5118 5119 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 5120 file_info->FileAttributes = fp->f_ci->m_fattr; 5121 file_info->ReparseTag = 0; 5122 rsp->OutputBufferLength = 5123 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 5124 return 0; 5125 } 5126 5127 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 5128 struct ksmbd_file *fp, void *rsp_org) 5129 { 5130 struct smb311_posix_qinfo *file_info; 5131 struct inode *inode = file_inode(fp->filp); 5132 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 5133 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 5134 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 5135 struct kstat stat; 5136 u64 time; 5137 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 5138 int ret; 5139 5140 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5141 AT_STATX_SYNC_AS_STAT); 5142 if (ret) 5143 return ret; 5144 5145 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 5146 file_info->CreationTime = cpu_to_le64(fp->create_time); 5147 time = ksmbd_UnixTimeToNT(stat.atime); 5148 file_info->LastAccessTime = cpu_to_le64(time); 5149 time = ksmbd_UnixTimeToNT(stat.mtime); 5150 file_info->LastWriteTime = cpu_to_le64(time); 5151 time = ksmbd_UnixTimeToNT(stat.ctime); 5152 file_info->ChangeTime = cpu_to_le64(time); 5153 file_info->DosAttributes = fp->f_ci->m_fattr; 5154 file_info->Inode = cpu_to_le64(stat.ino); 5155 file_info->EndOfFile = cpu_to_le64(stat.size); 5156 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5157 file_info->HardLinks = cpu_to_le32(stat.nlink); 5158 file_info->Mode = cpu_to_le32(stat.mode & 0777); 5159 file_info->DeviceId = cpu_to_le32(stat.rdev); 5160 5161 /* 5162 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 5163 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 5164 * sub_auth(4 * 1(num_subauth)) + RID(4). 5165 */ 5166 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 5167 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 5168 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 5169 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 5170 5171 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 5172 5173 return 0; 5174 } 5175 5176 static int smb2_get_info_file(struct ksmbd_work *work, 5177 struct smb2_query_info_req *req, 5178 struct smb2_query_info_rsp *rsp) 5179 { 5180 struct ksmbd_file *fp; 5181 int fileinfoclass = 0; 5182 int rc = 0; 5183 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5184 5185 if (test_share_config_flag(work->tcon->share_conf, 5186 KSMBD_SHARE_FLAG_PIPE)) { 5187 /* smb2 info file called for pipe */ 5188 return smb2_get_info_file_pipe(work->sess, req, rsp, 5189 work->response_buf); 5190 } 5191 5192 if (work->next_smb2_rcv_hdr_off) { 5193 if (!has_file_id(req->VolatileFileId)) { 5194 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5195 work->compound_fid); 5196 id = work->compound_fid; 5197 pid = work->compound_pfid; 5198 } 5199 } 5200 5201 if (!has_file_id(id)) { 5202 id = req->VolatileFileId; 5203 pid = req->PersistentFileId; 5204 } 5205 5206 fp = ksmbd_lookup_fd_slow(work, id, pid); 5207 if (!fp) 5208 return -ENOENT; 5209 5210 fileinfoclass = req->FileInfoClass; 5211 5212 switch (fileinfoclass) { 5213 case FILE_ACCESS_INFORMATION: 5214 get_file_access_info(rsp, fp, work->response_buf); 5215 break; 5216 5217 case FILE_BASIC_INFORMATION: 5218 rc = get_file_basic_info(rsp, fp, work->response_buf); 5219 break; 5220 5221 case FILE_STANDARD_INFORMATION: 5222 rc = get_file_standard_info(rsp, fp, work->response_buf); 5223 break; 5224 5225 case FILE_ALIGNMENT_INFORMATION: 5226 get_file_alignment_info(rsp, work->response_buf); 5227 break; 5228 5229 case FILE_ALL_INFORMATION: 5230 rc = get_file_all_info(work, rsp, fp, work->response_buf); 5231 break; 5232 5233 case FILE_ALTERNATE_NAME_INFORMATION: 5234 get_file_alternate_info(work, rsp, fp, work->response_buf); 5235 break; 5236 5237 case FILE_STREAM_INFORMATION: 5238 rc = get_file_stream_info(work, rsp, fp, work->response_buf); 5239 break; 5240 5241 case FILE_INTERNAL_INFORMATION: 5242 rc = get_file_internal_info(rsp, fp, work->response_buf); 5243 break; 5244 5245 case FILE_NETWORK_OPEN_INFORMATION: 5246 rc = get_file_network_open_info(rsp, fp, work->response_buf); 5247 break; 5248 5249 case FILE_EA_INFORMATION: 5250 get_file_ea_info(rsp, work->response_buf); 5251 break; 5252 5253 case FILE_FULL_EA_INFORMATION: 5254 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 5255 break; 5256 5257 case FILE_POSITION_INFORMATION: 5258 get_file_position_info(rsp, fp, work->response_buf); 5259 break; 5260 5261 case FILE_MODE_INFORMATION: 5262 get_file_mode_info(rsp, fp, work->response_buf); 5263 break; 5264 5265 case FILE_COMPRESSION_INFORMATION: 5266 rc = get_file_compression_info(rsp, fp, work->response_buf); 5267 break; 5268 5269 case FILE_ATTRIBUTE_TAG_INFORMATION: 5270 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 5271 break; 5272 case SMB_FIND_FILE_POSIX_INFO: 5273 if (!work->tcon->posix_extensions) { 5274 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5275 rc = -EOPNOTSUPP; 5276 } else { 5277 rc = find_file_posix_info(rsp, fp, work->response_buf); 5278 } 5279 break; 5280 default: 5281 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 5282 fileinfoclass); 5283 rc = -EOPNOTSUPP; 5284 } 5285 if (!rc) 5286 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5287 rsp, work->response_buf); 5288 ksmbd_fd_put(work, fp); 5289 return rc; 5290 } 5291 5292 static int smb2_get_info_filesystem(struct ksmbd_work *work, 5293 struct smb2_query_info_req *req, 5294 struct smb2_query_info_rsp *rsp) 5295 { 5296 struct ksmbd_session *sess = work->sess; 5297 struct ksmbd_conn *conn = work->conn; 5298 struct ksmbd_share_config *share = work->tcon->share_conf; 5299 int fsinfoclass = 0; 5300 struct kstatfs stfs; 5301 struct path path; 5302 int rc = 0, len; 5303 5304 if (!share->path) 5305 return -EIO; 5306 5307 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5308 if (rc) { 5309 pr_err("cannot create vfs path\n"); 5310 return -EIO; 5311 } 5312 5313 rc = vfs_statfs(&path, &stfs); 5314 if (rc) { 5315 pr_err("cannot do stat of path %s\n", share->path); 5316 path_put(&path); 5317 return -EIO; 5318 } 5319 5320 fsinfoclass = req->FileInfoClass; 5321 5322 switch (fsinfoclass) { 5323 case FS_DEVICE_INFORMATION: 5324 { 5325 struct filesystem_device_info *info; 5326 5327 info = (struct filesystem_device_info *)rsp->Buffer; 5328 5329 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); 5330 info->DeviceCharacteristics = 5331 cpu_to_le32(FILE_DEVICE_IS_MOUNTED); 5332 if (!test_tree_conn_flag(work->tcon, 5333 KSMBD_TREE_CONN_FLAG_WRITABLE)) 5334 info->DeviceCharacteristics |= 5335 cpu_to_le32(FILE_READ_ONLY_DEVICE); 5336 rsp->OutputBufferLength = cpu_to_le32(8); 5337 break; 5338 } 5339 case FS_ATTRIBUTE_INFORMATION: 5340 { 5341 struct filesystem_attribute_info *info; 5342 size_t sz; 5343 5344 info = (struct filesystem_attribute_info *)rsp->Buffer; 5345 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5346 FILE_PERSISTENT_ACLS | 5347 FILE_UNICODE_ON_DISK | 5348 FILE_CASE_PRESERVED_NAMES | 5349 FILE_CASE_SENSITIVE_SEARCH | 5350 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5351 5352 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5353 5354 if (test_share_config_flag(work->tcon->share_conf, 5355 KSMBD_SHARE_FLAG_STREAMS)) 5356 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5357 5358 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5359 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5360 "NTFS", PATH_MAX, conn->local_nls, 0); 5361 len = len * 2; 5362 info->FileSystemNameLen = cpu_to_le32(len); 5363 sz = sizeof(struct filesystem_attribute_info) + len; 5364 rsp->OutputBufferLength = cpu_to_le32(sz); 5365 break; 5366 } 5367 case FS_VOLUME_INFORMATION: 5368 { 5369 struct filesystem_vol_info *info; 5370 size_t sz; 5371 unsigned int serial_crc = 0; 5372 5373 info = (struct filesystem_vol_info *)(rsp->Buffer); 5374 info->VolumeCreationTime = 0; 5375 serial_crc = crc32_le(serial_crc, share->name, 5376 strlen(share->name)); 5377 serial_crc = crc32_le(serial_crc, share->path, 5378 strlen(share->path)); 5379 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5380 strlen(ksmbd_netbios_name())); 5381 /* Taking dummy value of serial number*/ 5382 info->SerialNumber = cpu_to_le32(serial_crc); 5383 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5384 share->name, PATH_MAX, 5385 conn->local_nls, 0); 5386 len = len * 2; 5387 info->VolumeLabelSize = cpu_to_le32(len); 5388 info->Reserved = 0; 5389 sz = sizeof(struct filesystem_vol_info) + len; 5390 rsp->OutputBufferLength = cpu_to_le32(sz); 5391 break; 5392 } 5393 case FS_SIZE_INFORMATION: 5394 { 5395 struct filesystem_info *info; 5396 5397 info = (struct filesystem_info *)(rsp->Buffer); 5398 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5399 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); 5400 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5401 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5402 rsp->OutputBufferLength = cpu_to_le32(24); 5403 break; 5404 } 5405 case FS_FULL_SIZE_INFORMATION: 5406 { 5407 struct smb2_fs_full_size_info *info; 5408 5409 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5410 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5411 info->CallerAvailableAllocationUnits = 5412 cpu_to_le64(stfs.f_bavail); 5413 info->ActualAvailableAllocationUnits = 5414 cpu_to_le64(stfs.f_bfree); 5415 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5416 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5417 rsp->OutputBufferLength = cpu_to_le32(32); 5418 break; 5419 } 5420 case FS_OBJECT_ID_INFORMATION: 5421 { 5422 struct object_id_info *info; 5423 5424 info = (struct object_id_info *)(rsp->Buffer); 5425 5426 if (!user_guest(sess->user)) 5427 memcpy(info->objid, user_passkey(sess->user), 16); 5428 else 5429 memset(info->objid, 0, 16); 5430 5431 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5432 info->extended_info.version = cpu_to_le32(1); 5433 info->extended_info.release = cpu_to_le32(1); 5434 info->extended_info.rel_date = 0; 5435 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5436 rsp->OutputBufferLength = cpu_to_le32(64); 5437 break; 5438 } 5439 case FS_SECTOR_SIZE_INFORMATION: 5440 { 5441 struct smb3_fs_ss_info *info; 5442 unsigned int sector_size = 5443 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5444 5445 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5446 5447 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5448 info->PhysicalBytesPerSectorForAtomicity = 5449 cpu_to_le32(sector_size); 5450 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5451 info->FSEffPhysicalBytesPerSectorForAtomicity = 5452 cpu_to_le32(sector_size); 5453 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5454 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5455 info->ByteOffsetForSectorAlignment = 0; 5456 info->ByteOffsetForPartitionAlignment = 0; 5457 rsp->OutputBufferLength = cpu_to_le32(28); 5458 break; 5459 } 5460 case FS_CONTROL_INFORMATION: 5461 { 5462 /* 5463 * TODO : The current implementation is based on 5464 * test result with win7(NTFS) server. It's need to 5465 * modify this to get valid Quota values 5466 * from Linux kernel 5467 */ 5468 struct smb2_fs_control_info *info; 5469 5470 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5471 info->FreeSpaceStartFiltering = 0; 5472 info->FreeSpaceThreshold = 0; 5473 info->FreeSpaceStopFiltering = 0; 5474 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5475 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5476 info->Padding = 0; 5477 rsp->OutputBufferLength = cpu_to_le32(48); 5478 break; 5479 } 5480 case FS_POSIX_INFORMATION: 5481 { 5482 struct filesystem_posix_info *info; 5483 5484 if (!work->tcon->posix_extensions) { 5485 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5486 rc = -EOPNOTSUPP; 5487 } else { 5488 info = (struct filesystem_posix_info *)(rsp->Buffer); 5489 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5490 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5491 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5492 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5493 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5494 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5495 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5496 rsp->OutputBufferLength = cpu_to_le32(56); 5497 } 5498 break; 5499 } 5500 default: 5501 path_put(&path); 5502 return -EOPNOTSUPP; 5503 } 5504 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5505 rsp, work->response_buf); 5506 path_put(&path); 5507 return rc; 5508 } 5509 5510 static int smb2_get_info_sec(struct ksmbd_work *work, 5511 struct smb2_query_info_req *req, 5512 struct smb2_query_info_rsp *rsp) 5513 { 5514 struct ksmbd_file *fp; 5515 struct mnt_idmap *idmap; 5516 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5517 struct smb_fattr fattr = {{0}}; 5518 struct inode *inode; 5519 __u32 secdesclen = 0; 5520 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5521 int addition_info = le32_to_cpu(req->AdditionalInformation); 5522 int rc = 0, ppntsd_size = 0; 5523 5524 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5525 PROTECTED_DACL_SECINFO | 5526 UNPROTECTED_DACL_SECINFO)) { 5527 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5528 addition_info); 5529 5530 pntsd->revision = cpu_to_le16(1); 5531 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5532 pntsd->osidoffset = 0; 5533 pntsd->gsidoffset = 0; 5534 pntsd->sacloffset = 0; 5535 pntsd->dacloffset = 0; 5536 5537 secdesclen = sizeof(struct smb_ntsd); 5538 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5539 5540 return 0; 5541 } 5542 5543 if (work->next_smb2_rcv_hdr_off) { 5544 if (!has_file_id(req->VolatileFileId)) { 5545 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5546 work->compound_fid); 5547 id = work->compound_fid; 5548 pid = work->compound_pfid; 5549 } 5550 } 5551 5552 if (!has_file_id(id)) { 5553 id = req->VolatileFileId; 5554 pid = req->PersistentFileId; 5555 } 5556 5557 fp = ksmbd_lookup_fd_slow(work, id, pid); 5558 if (!fp) 5559 return -ENOENT; 5560 5561 idmap = file_mnt_idmap(fp->filp); 5562 inode = file_inode(fp->filp); 5563 ksmbd_acls_fattr(&fattr, idmap, inode); 5564 5565 if (test_share_config_flag(work->tcon->share_conf, 5566 KSMBD_SHARE_FLAG_ACL_XATTR)) 5567 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5568 fp->filp->f_path.dentry, 5569 &ppntsd); 5570 5571 /* Check if sd buffer size exceeds response buffer size */ 5572 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5573 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5574 addition_info, &secdesclen, &fattr); 5575 posix_acl_release(fattr.cf_acls); 5576 posix_acl_release(fattr.cf_dacls); 5577 kfree(ppntsd); 5578 ksmbd_fd_put(work, fp); 5579 if (rc) 5580 return rc; 5581 5582 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5583 return 0; 5584 } 5585 5586 /** 5587 * smb2_query_info() - handler for smb2 query info command 5588 * @work: smb work containing query info request buffer 5589 * 5590 * Return: 0 on success, otherwise error 5591 */ 5592 int smb2_query_info(struct ksmbd_work *work) 5593 { 5594 struct smb2_query_info_req *req; 5595 struct smb2_query_info_rsp *rsp; 5596 int rc = 0; 5597 5598 WORK_BUFFERS(work, req, rsp); 5599 5600 ksmbd_debug(SMB, "GOT query info request\n"); 5601 5602 if (ksmbd_override_fsids(work)) { 5603 rc = -ENOMEM; 5604 goto err_out; 5605 } 5606 5607 switch (req->InfoType) { 5608 case SMB2_O_INFO_FILE: 5609 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5610 rc = smb2_get_info_file(work, req, rsp); 5611 break; 5612 case SMB2_O_INFO_FILESYSTEM: 5613 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5614 rc = smb2_get_info_filesystem(work, req, rsp); 5615 break; 5616 case SMB2_O_INFO_SECURITY: 5617 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5618 rc = smb2_get_info_sec(work, req, rsp); 5619 break; 5620 default: 5621 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5622 req->InfoType); 5623 rc = -EOPNOTSUPP; 5624 } 5625 ksmbd_revert_fsids(work); 5626 5627 if (!rc) { 5628 rsp->StructureSize = cpu_to_le16(9); 5629 rsp->OutputBufferOffset = cpu_to_le16(72); 5630 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5631 offsetof(struct smb2_query_info_rsp, Buffer) + 5632 le32_to_cpu(rsp->OutputBufferLength)); 5633 } 5634 5635 err_out: 5636 if (rc < 0) { 5637 if (rc == -EACCES) 5638 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5639 else if (rc == -ENOENT) 5640 rsp->hdr.Status = STATUS_FILE_CLOSED; 5641 else if (rc == -EIO) 5642 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5643 else if (rc == -ENOMEM) 5644 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5645 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5646 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5647 smb2_set_err_rsp(work); 5648 5649 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5650 rc); 5651 return rc; 5652 } 5653 return 0; 5654 } 5655 5656 /** 5657 * smb2_close_pipe() - handler for closing IPC pipe 5658 * @work: smb work containing close request buffer 5659 * 5660 * Return: 0 5661 */ 5662 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5663 { 5664 u64 id; 5665 struct smb2_close_req *req; 5666 struct smb2_close_rsp *rsp; 5667 5668 WORK_BUFFERS(work, req, rsp); 5669 5670 id = req->VolatileFileId; 5671 ksmbd_session_rpc_close(work->sess, id); 5672 5673 rsp->StructureSize = cpu_to_le16(60); 5674 rsp->Flags = 0; 5675 rsp->Reserved = 0; 5676 rsp->CreationTime = 0; 5677 rsp->LastAccessTime = 0; 5678 rsp->LastWriteTime = 0; 5679 rsp->ChangeTime = 0; 5680 rsp->AllocationSize = 0; 5681 rsp->EndOfFile = 0; 5682 rsp->Attributes = 0; 5683 5684 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5685 sizeof(struct smb2_close_rsp)); 5686 } 5687 5688 /** 5689 * smb2_close() - handler for smb2 close file command 5690 * @work: smb work containing close request buffer 5691 * 5692 * Return: 0 5693 */ 5694 int smb2_close(struct ksmbd_work *work) 5695 { 5696 u64 volatile_id = KSMBD_NO_FID; 5697 u64 sess_id; 5698 struct smb2_close_req *req; 5699 struct smb2_close_rsp *rsp; 5700 struct ksmbd_conn *conn = work->conn; 5701 struct ksmbd_file *fp; 5702 u64 time; 5703 int err = 0; 5704 5705 WORK_BUFFERS(work, req, rsp); 5706 5707 if (test_share_config_flag(work->tcon->share_conf, 5708 KSMBD_SHARE_FLAG_PIPE)) { 5709 ksmbd_debug(SMB, "IPC pipe close request\n"); 5710 return smb2_close_pipe(work); 5711 } 5712 5713 sess_id = le64_to_cpu(req->hdr.SessionId); 5714 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5715 sess_id = work->compound_sid; 5716 5717 work->compound_sid = 0; 5718 if (check_session_id(conn, sess_id)) { 5719 work->compound_sid = sess_id; 5720 } else { 5721 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5722 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5723 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5724 err = -EBADF; 5725 goto out; 5726 } 5727 5728 if (work->next_smb2_rcv_hdr_off && 5729 !has_file_id(req->VolatileFileId)) { 5730 if (!has_file_id(work->compound_fid)) { 5731 /* file already closed, return FILE_CLOSED */ 5732 ksmbd_debug(SMB, "file already closed\n"); 5733 rsp->hdr.Status = STATUS_FILE_CLOSED; 5734 err = -EBADF; 5735 goto out; 5736 } else { 5737 ksmbd_debug(SMB, 5738 "Compound request set FID = %llu:%llu\n", 5739 work->compound_fid, 5740 work->compound_pfid); 5741 volatile_id = work->compound_fid; 5742 5743 /* file closed, stored id is not valid anymore */ 5744 work->compound_fid = KSMBD_NO_FID; 5745 work->compound_pfid = KSMBD_NO_FID; 5746 } 5747 } else { 5748 volatile_id = req->VolatileFileId; 5749 } 5750 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5751 5752 rsp->StructureSize = cpu_to_le16(60); 5753 rsp->Reserved = 0; 5754 5755 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5756 struct kstat stat; 5757 int ret; 5758 5759 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5760 if (!fp) { 5761 err = -ENOENT; 5762 goto out; 5763 } 5764 5765 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5766 AT_STATX_SYNC_AS_STAT); 5767 if (ret) { 5768 ksmbd_fd_put(work, fp); 5769 goto out; 5770 } 5771 5772 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5773 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 5774 cpu_to_le64(stat.blocks << 9); 5775 rsp->EndOfFile = cpu_to_le64(stat.size); 5776 rsp->Attributes = fp->f_ci->m_fattr; 5777 rsp->CreationTime = cpu_to_le64(fp->create_time); 5778 time = ksmbd_UnixTimeToNT(stat.atime); 5779 rsp->LastAccessTime = cpu_to_le64(time); 5780 time = ksmbd_UnixTimeToNT(stat.mtime); 5781 rsp->LastWriteTime = cpu_to_le64(time); 5782 time = ksmbd_UnixTimeToNT(stat.ctime); 5783 rsp->ChangeTime = cpu_to_le64(time); 5784 ksmbd_fd_put(work, fp); 5785 } else { 5786 rsp->Flags = 0; 5787 rsp->AllocationSize = 0; 5788 rsp->EndOfFile = 0; 5789 rsp->Attributes = 0; 5790 rsp->CreationTime = 0; 5791 rsp->LastAccessTime = 0; 5792 rsp->LastWriteTime = 0; 5793 rsp->ChangeTime = 0; 5794 } 5795 5796 err = ksmbd_close_fd(work, volatile_id); 5797 out: 5798 if (!err) 5799 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 5800 sizeof(struct smb2_close_rsp)); 5801 5802 if (err) { 5803 if (rsp->hdr.Status == 0) 5804 rsp->hdr.Status = STATUS_FILE_CLOSED; 5805 smb2_set_err_rsp(work); 5806 } 5807 5808 return err; 5809 } 5810 5811 /** 5812 * smb2_echo() - handler for smb2 echo(ping) command 5813 * @work: smb work containing echo request buffer 5814 * 5815 * Return: 0 5816 */ 5817 int smb2_echo(struct ksmbd_work *work) 5818 { 5819 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); 5820 5821 if (work->next_smb2_rcv_hdr_off) 5822 rsp = ksmbd_resp_buf_next(work); 5823 5824 rsp->StructureSize = cpu_to_le16(4); 5825 rsp->Reserved = 0; 5826 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 5827 } 5828 5829 static int smb2_rename(struct ksmbd_work *work, 5830 struct ksmbd_file *fp, 5831 struct smb2_file_rename_info *file_info, 5832 struct nls_table *local_nls) 5833 { 5834 struct ksmbd_share_config *share = fp->tcon->share_conf; 5835 char *new_name = NULL; 5836 int rc, flags = 0; 5837 5838 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 5839 new_name = smb2_get_name(file_info->FileName, 5840 le32_to_cpu(file_info->FileNameLength), 5841 local_nls); 5842 if (IS_ERR(new_name)) 5843 return PTR_ERR(new_name); 5844 5845 if (strchr(new_name, ':')) { 5846 int s_type; 5847 char *xattr_stream_name, *stream_name = NULL; 5848 size_t xattr_stream_size; 5849 int len; 5850 5851 rc = parse_stream_name(new_name, &stream_name, &s_type); 5852 if (rc < 0) 5853 goto out; 5854 5855 len = strlen(new_name); 5856 if (len > 0 && new_name[len - 1] != '/') { 5857 pr_err("not allow base filename in rename\n"); 5858 rc = -ESHARE; 5859 goto out; 5860 } 5861 5862 rc = ksmbd_vfs_xattr_stream_name(stream_name, 5863 &xattr_stream_name, 5864 &xattr_stream_size, 5865 s_type); 5866 if (rc) 5867 goto out; 5868 5869 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 5870 &fp->filp->f_path, 5871 xattr_stream_name, 5872 NULL, 0, 0, true); 5873 if (rc < 0) { 5874 pr_err("failed to store stream name in xattr: %d\n", 5875 rc); 5876 rc = -EINVAL; 5877 goto out; 5878 } 5879 5880 goto out; 5881 } 5882 5883 ksmbd_debug(SMB, "new name %s\n", new_name); 5884 if (ksmbd_share_veto_filename(share, new_name)) { 5885 rc = -ENOENT; 5886 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 5887 goto out; 5888 } 5889 5890 if (!file_info->ReplaceIfExists) 5891 flags = RENAME_NOREPLACE; 5892 5893 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 5894 if (!rc) 5895 smb_break_all_levII_oplock(work, fp, 0); 5896 out: 5897 kfree(new_name); 5898 return rc; 5899 } 5900 5901 static int smb2_create_link(struct ksmbd_work *work, 5902 struct ksmbd_share_config *share, 5903 struct smb2_file_link_info *file_info, 5904 unsigned int buf_len, struct file *filp, 5905 struct nls_table *local_nls) 5906 { 5907 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 5908 struct path path, parent_path; 5909 bool file_present = false; 5910 int rc; 5911 5912 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 5913 le32_to_cpu(file_info->FileNameLength)) 5914 return -EINVAL; 5915 5916 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 5917 pathname = kmalloc(PATH_MAX, GFP_KERNEL); 5918 if (!pathname) 5919 return -ENOMEM; 5920 5921 link_name = smb2_get_name(file_info->FileName, 5922 le32_to_cpu(file_info->FileNameLength), 5923 local_nls); 5924 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 5925 rc = -EINVAL; 5926 goto out; 5927 } 5928 5929 ksmbd_debug(SMB, "link name is %s\n", link_name); 5930 target_name = file_path(filp, pathname, PATH_MAX); 5931 if (IS_ERR(target_name)) { 5932 rc = -EINVAL; 5933 goto out; 5934 } 5935 5936 ksmbd_debug(SMB, "target name is %s\n", target_name); 5937 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, 5938 &parent_path, &path, 0); 5939 if (rc) { 5940 if (rc != -ENOENT) 5941 goto out; 5942 } else 5943 file_present = true; 5944 5945 if (file_info->ReplaceIfExists) { 5946 if (file_present) { 5947 rc = ksmbd_vfs_remove_file(work, &path); 5948 if (rc) { 5949 rc = -EINVAL; 5950 ksmbd_debug(SMB, "cannot delete %s\n", 5951 link_name); 5952 goto out; 5953 } 5954 } 5955 } else { 5956 if (file_present) { 5957 rc = -EEXIST; 5958 ksmbd_debug(SMB, "link already exists\n"); 5959 goto out; 5960 } 5961 } 5962 5963 rc = ksmbd_vfs_link(work, target_name, link_name); 5964 if (rc) 5965 rc = -EINVAL; 5966 out: 5967 if (file_present) 5968 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 5969 5970 if (!IS_ERR(link_name)) 5971 kfree(link_name); 5972 kfree(pathname); 5973 return rc; 5974 } 5975 5976 static int set_file_basic_info(struct ksmbd_file *fp, 5977 struct smb2_file_basic_info *file_info, 5978 struct ksmbd_share_config *share) 5979 { 5980 struct iattr attrs; 5981 struct file *filp; 5982 struct inode *inode; 5983 struct mnt_idmap *idmap; 5984 int rc = 0; 5985 5986 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 5987 return -EACCES; 5988 5989 attrs.ia_valid = 0; 5990 filp = fp->filp; 5991 inode = file_inode(filp); 5992 idmap = file_mnt_idmap(filp); 5993 5994 if (file_info->CreationTime) 5995 fp->create_time = le64_to_cpu(file_info->CreationTime); 5996 5997 if (file_info->LastAccessTime) { 5998 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 5999 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 6000 } 6001 6002 attrs.ia_valid |= ATTR_CTIME; 6003 if (file_info->ChangeTime) 6004 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); 6005 else 6006 attrs.ia_ctime = inode_get_ctime(inode); 6007 6008 if (file_info->LastWriteTime) { 6009 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 6010 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 6011 } 6012 6013 if (file_info->Attributes) { 6014 if (!S_ISDIR(inode->i_mode) && 6015 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 6016 pr_err("can't change a file to a directory\n"); 6017 return -EINVAL; 6018 } 6019 6020 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 6021 fp->f_ci->m_fattr = file_info->Attributes | 6022 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 6023 } 6024 6025 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 6026 (file_info->CreationTime || file_info->Attributes)) { 6027 struct xattr_dos_attrib da = {0}; 6028 6029 da.version = 4; 6030 da.itime = fp->itime; 6031 da.create_time = fp->create_time; 6032 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 6033 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 6034 XATTR_DOSINFO_ITIME; 6035 6036 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 6037 true); 6038 if (rc) 6039 ksmbd_debug(SMB, 6040 "failed to restore file attribute in EA\n"); 6041 rc = 0; 6042 } 6043 6044 if (attrs.ia_valid) { 6045 struct dentry *dentry = filp->f_path.dentry; 6046 struct inode *inode = d_inode(dentry); 6047 6048 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 6049 return -EACCES; 6050 6051 inode_lock(inode); 6052 inode_set_ctime_to_ts(inode, attrs.ia_ctime); 6053 attrs.ia_valid &= ~ATTR_CTIME; 6054 rc = notify_change(idmap, dentry, &attrs, NULL); 6055 inode_unlock(inode); 6056 } 6057 return rc; 6058 } 6059 6060 static int set_file_allocation_info(struct ksmbd_work *work, 6061 struct ksmbd_file *fp, 6062 struct smb2_file_alloc_info *file_alloc_info) 6063 { 6064 /* 6065 * TODO : It's working fine only when store dos attributes 6066 * is not yes. need to implement a logic which works 6067 * properly with any smb.conf option 6068 */ 6069 6070 loff_t alloc_blks; 6071 struct inode *inode; 6072 struct kstat stat; 6073 int rc; 6074 6075 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6076 return -EACCES; 6077 6078 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6079 AT_STATX_SYNC_AS_STAT); 6080 if (rc) 6081 return rc; 6082 6083 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 6084 inode = file_inode(fp->filp); 6085 6086 if (alloc_blks > stat.blocks) { 6087 smb_break_all_levII_oplock(work, fp, 1); 6088 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 6089 alloc_blks * 512); 6090 if (rc && rc != -EOPNOTSUPP) { 6091 pr_err("vfs_fallocate is failed : %d\n", rc); 6092 return rc; 6093 } 6094 } else if (alloc_blks < stat.blocks) { 6095 loff_t size; 6096 6097 /* 6098 * Allocation size could be smaller than original one 6099 * which means allocated blocks in file should be 6100 * deallocated. use truncate to cut out it, but inode 6101 * size is also updated with truncate offset. 6102 * inode size is retained by backup inode size. 6103 */ 6104 size = i_size_read(inode); 6105 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 6106 if (rc) { 6107 pr_err("truncate failed!, err %d\n", rc); 6108 return rc; 6109 } 6110 if (size < alloc_blks * 512) 6111 i_size_write(inode, size); 6112 } 6113 return 0; 6114 } 6115 6116 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6117 struct smb2_file_eof_info *file_eof_info) 6118 { 6119 loff_t newsize; 6120 struct inode *inode; 6121 int rc; 6122 6123 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6124 return -EACCES; 6125 6126 newsize = le64_to_cpu(file_eof_info->EndOfFile); 6127 inode = file_inode(fp->filp); 6128 6129 /* 6130 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 6131 * on FAT32 shared device, truncate execution time is too long 6132 * and network error could cause from windows client. because 6133 * truncate of some filesystem like FAT32 fill zero data in 6134 * truncated range. 6135 */ 6136 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { 6137 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 6138 rc = ksmbd_vfs_truncate(work, fp, newsize); 6139 if (rc) { 6140 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 6141 if (rc != -EAGAIN) 6142 rc = -EBADF; 6143 return rc; 6144 } 6145 } 6146 return 0; 6147 } 6148 6149 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6150 struct smb2_file_rename_info *rename_info, 6151 unsigned int buf_len) 6152 { 6153 if (!(fp->daccess & FILE_DELETE_LE)) { 6154 pr_err("no right to delete : 0x%x\n", fp->daccess); 6155 return -EACCES; 6156 } 6157 6158 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 6159 le32_to_cpu(rename_info->FileNameLength)) 6160 return -EINVAL; 6161 6162 if (!le32_to_cpu(rename_info->FileNameLength)) 6163 return -EINVAL; 6164 6165 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 6166 } 6167 6168 static int set_file_disposition_info(struct ksmbd_file *fp, 6169 struct smb2_file_disposition_info *file_info) 6170 { 6171 struct inode *inode; 6172 6173 if (!(fp->daccess & FILE_DELETE_LE)) { 6174 pr_err("no right to delete : 0x%x\n", fp->daccess); 6175 return -EACCES; 6176 } 6177 6178 inode = file_inode(fp->filp); 6179 if (file_info->DeletePending) { 6180 if (S_ISDIR(inode->i_mode) && 6181 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 6182 return -EBUSY; 6183 ksmbd_set_inode_pending_delete(fp); 6184 } else { 6185 ksmbd_clear_inode_pending_delete(fp); 6186 } 6187 return 0; 6188 } 6189 6190 static int set_file_position_info(struct ksmbd_file *fp, 6191 struct smb2_file_pos_info *file_info) 6192 { 6193 loff_t current_byte_offset; 6194 unsigned long sector_size; 6195 struct inode *inode; 6196 6197 inode = file_inode(fp->filp); 6198 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 6199 sector_size = inode->i_sb->s_blocksize; 6200 6201 if (current_byte_offset < 0 || 6202 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 6203 current_byte_offset & (sector_size - 1))) { 6204 pr_err("CurrentByteOffset is not valid : %llu\n", 6205 current_byte_offset); 6206 return -EINVAL; 6207 } 6208 6209 fp->filp->f_pos = current_byte_offset; 6210 return 0; 6211 } 6212 6213 static int set_file_mode_info(struct ksmbd_file *fp, 6214 struct smb2_file_mode_info *file_info) 6215 { 6216 __le32 mode; 6217 6218 mode = file_info->Mode; 6219 6220 if ((mode & ~FILE_MODE_INFO_MASK)) { 6221 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 6222 return -EINVAL; 6223 } 6224 6225 /* 6226 * TODO : need to implement consideration for 6227 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 6228 */ 6229 ksmbd_vfs_set_fadvise(fp->filp, mode); 6230 fp->coption = mode; 6231 return 0; 6232 } 6233 6234 /** 6235 * smb2_set_info_file() - handler for smb2 set info command 6236 * @work: smb work containing set info command buffer 6237 * @fp: ksmbd_file pointer 6238 * @req: request buffer pointer 6239 * @share: ksmbd_share_config pointer 6240 * 6241 * Return: 0 on success, otherwise error 6242 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH 6243 */ 6244 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 6245 struct smb2_set_info_req *req, 6246 struct ksmbd_share_config *share) 6247 { 6248 unsigned int buf_len = le32_to_cpu(req->BufferLength); 6249 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); 6250 6251 switch (req->FileInfoClass) { 6252 case FILE_BASIC_INFORMATION: 6253 { 6254 if (buf_len < sizeof(struct smb2_file_basic_info)) 6255 return -EINVAL; 6256 6257 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share); 6258 } 6259 case FILE_ALLOCATION_INFORMATION: 6260 { 6261 if (buf_len < sizeof(struct smb2_file_alloc_info)) 6262 return -EINVAL; 6263 6264 return set_file_allocation_info(work, fp, 6265 (struct smb2_file_alloc_info *)buffer); 6266 } 6267 case FILE_END_OF_FILE_INFORMATION: 6268 { 6269 if (buf_len < sizeof(struct smb2_file_eof_info)) 6270 return -EINVAL; 6271 6272 return set_end_of_file_info(work, fp, 6273 (struct smb2_file_eof_info *)buffer); 6274 } 6275 case FILE_RENAME_INFORMATION: 6276 { 6277 if (buf_len < sizeof(struct smb2_file_rename_info)) 6278 return -EINVAL; 6279 6280 return set_rename_info(work, fp, 6281 (struct smb2_file_rename_info *)buffer, 6282 buf_len); 6283 } 6284 case FILE_LINK_INFORMATION: 6285 { 6286 if (buf_len < sizeof(struct smb2_file_link_info)) 6287 return -EINVAL; 6288 6289 return smb2_create_link(work, work->tcon->share_conf, 6290 (struct smb2_file_link_info *)buffer, 6291 buf_len, fp->filp, 6292 work->conn->local_nls); 6293 } 6294 case FILE_DISPOSITION_INFORMATION: 6295 { 6296 if (buf_len < sizeof(struct smb2_file_disposition_info)) 6297 return -EINVAL; 6298 6299 return set_file_disposition_info(fp, 6300 (struct smb2_file_disposition_info *)buffer); 6301 } 6302 case FILE_FULL_EA_INFORMATION: 6303 { 6304 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 6305 pr_err("Not permitted to write ext attr: 0x%x\n", 6306 fp->daccess); 6307 return -EACCES; 6308 } 6309 6310 if (buf_len < sizeof(struct smb2_ea_info)) 6311 return -EINVAL; 6312 6313 return smb2_set_ea((struct smb2_ea_info *)buffer, 6314 buf_len, &fp->filp->f_path, true); 6315 } 6316 case FILE_POSITION_INFORMATION: 6317 { 6318 if (buf_len < sizeof(struct smb2_file_pos_info)) 6319 return -EINVAL; 6320 6321 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); 6322 } 6323 case FILE_MODE_INFORMATION: 6324 { 6325 if (buf_len < sizeof(struct smb2_file_mode_info)) 6326 return -EINVAL; 6327 6328 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); 6329 } 6330 } 6331 6332 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6333 return -EOPNOTSUPP; 6334 } 6335 6336 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6337 char *buffer, int buf_len) 6338 { 6339 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6340 6341 fp->saccess |= FILE_SHARE_DELETE_LE; 6342 6343 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6344 buf_len, false, true); 6345 } 6346 6347 /** 6348 * smb2_set_info() - handler for smb2 set info command handler 6349 * @work: smb work containing set info request buffer 6350 * 6351 * Return: 0 on success, otherwise error 6352 */ 6353 int smb2_set_info(struct ksmbd_work *work) 6354 { 6355 struct smb2_set_info_req *req; 6356 struct smb2_set_info_rsp *rsp; 6357 struct ksmbd_file *fp = NULL; 6358 int rc = 0; 6359 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6360 6361 ksmbd_debug(SMB, "Received set info request\n"); 6362 6363 if (work->next_smb2_rcv_hdr_off) { 6364 req = ksmbd_req_buf_next(work); 6365 rsp = ksmbd_resp_buf_next(work); 6366 if (!has_file_id(req->VolatileFileId)) { 6367 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6368 work->compound_fid); 6369 id = work->compound_fid; 6370 pid = work->compound_pfid; 6371 } 6372 } else { 6373 req = smb2_get_msg(work->request_buf); 6374 rsp = smb2_get_msg(work->response_buf); 6375 } 6376 6377 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6378 ksmbd_debug(SMB, "User does not have write permission\n"); 6379 pr_err("User does not have write permission\n"); 6380 rc = -EACCES; 6381 goto err_out; 6382 } 6383 6384 if (!has_file_id(id)) { 6385 id = req->VolatileFileId; 6386 pid = req->PersistentFileId; 6387 } 6388 6389 fp = ksmbd_lookup_fd_slow(work, id, pid); 6390 if (!fp) { 6391 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6392 rc = -ENOENT; 6393 goto err_out; 6394 } 6395 6396 switch (req->InfoType) { 6397 case SMB2_O_INFO_FILE: 6398 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6399 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6400 break; 6401 case SMB2_O_INFO_SECURITY: 6402 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6403 if (ksmbd_override_fsids(work)) { 6404 rc = -ENOMEM; 6405 goto err_out; 6406 } 6407 rc = smb2_set_info_sec(fp, 6408 le32_to_cpu(req->AdditionalInformation), 6409 (char *)req + le16_to_cpu(req->BufferOffset), 6410 le32_to_cpu(req->BufferLength)); 6411 ksmbd_revert_fsids(work); 6412 break; 6413 default: 6414 rc = -EOPNOTSUPP; 6415 } 6416 6417 if (rc < 0) 6418 goto err_out; 6419 6420 rsp->StructureSize = cpu_to_le16(2); 6421 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6422 sizeof(struct smb2_set_info_rsp)); 6423 if (rc) 6424 goto err_out; 6425 ksmbd_fd_put(work, fp); 6426 return 0; 6427 6428 err_out: 6429 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6430 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6431 else if (rc == -EINVAL) 6432 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6433 else if (rc == -ESHARE) 6434 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6435 else if (rc == -ENOENT) 6436 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6437 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6438 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6439 else if (rc == -EAGAIN) 6440 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6441 else if (rc == -EBADF || rc == -ESTALE) 6442 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6443 else if (rc == -EEXIST) 6444 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6445 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6446 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6447 smb2_set_err_rsp(work); 6448 ksmbd_fd_put(work, fp); 6449 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6450 return rc; 6451 } 6452 6453 /** 6454 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6455 * @work: smb work containing read IPC pipe command buffer 6456 * 6457 * Return: 0 on success, otherwise error 6458 */ 6459 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6460 { 6461 int nbytes = 0, err; 6462 u64 id; 6463 struct ksmbd_rpc_command *rpc_resp; 6464 struct smb2_read_req *req; 6465 struct smb2_read_rsp *rsp; 6466 6467 WORK_BUFFERS(work, req, rsp); 6468 6469 id = req->VolatileFileId; 6470 6471 rpc_resp = ksmbd_rpc_read(work->sess, id); 6472 if (rpc_resp) { 6473 void *aux_payload_buf; 6474 6475 if (rpc_resp->flags != KSMBD_RPC_OK) { 6476 err = -EINVAL; 6477 goto out; 6478 } 6479 6480 aux_payload_buf = 6481 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL); 6482 if (!aux_payload_buf) { 6483 err = -ENOMEM; 6484 goto out; 6485 } 6486 6487 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6488 6489 nbytes = rpc_resp->payload_sz; 6490 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6491 offsetof(struct smb2_read_rsp, Buffer), 6492 aux_payload_buf, nbytes); 6493 if (err) { 6494 kvfree(aux_payload_buf); 6495 goto out; 6496 } 6497 kvfree(rpc_resp); 6498 } else { 6499 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6500 offsetof(struct smb2_read_rsp, Buffer)); 6501 if (err) 6502 goto out; 6503 } 6504 6505 rsp->StructureSize = cpu_to_le16(17); 6506 rsp->DataOffset = 80; 6507 rsp->Reserved = 0; 6508 rsp->DataLength = cpu_to_le32(nbytes); 6509 rsp->DataRemaining = 0; 6510 rsp->Flags = 0; 6511 return 0; 6512 6513 out: 6514 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6515 smb2_set_err_rsp(work); 6516 kvfree(rpc_resp); 6517 return err; 6518 } 6519 6520 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6521 struct smb2_buffer_desc_v1 *desc, 6522 __le32 Channel, 6523 __le16 ChannelInfoLength) 6524 { 6525 unsigned int i, ch_count; 6526 6527 if (work->conn->dialect == SMB30_PROT_ID && 6528 Channel != SMB2_CHANNEL_RDMA_V1) 6529 return -EINVAL; 6530 6531 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6532 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6533 for (i = 0; i < ch_count; i++) { 6534 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6535 i, 6536 le32_to_cpu(desc[i].token), 6537 le32_to_cpu(desc[i].length)); 6538 } 6539 } 6540 if (!ch_count) 6541 return -EINVAL; 6542 6543 work->need_invalidate_rkey = 6544 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6545 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6546 work->remote_key = le32_to_cpu(desc->token); 6547 return 0; 6548 } 6549 6550 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6551 struct smb2_read_req *req, void *data_buf, 6552 size_t length) 6553 { 6554 int err; 6555 6556 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6557 (struct smb2_buffer_desc_v1 *) 6558 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6559 le16_to_cpu(req->ReadChannelInfoLength)); 6560 if (err) 6561 return err; 6562 6563 return length; 6564 } 6565 6566 /** 6567 * smb2_read() - handler for smb2 read from file 6568 * @work: smb work containing read command buffer 6569 * 6570 * Return: 0 on success, otherwise error 6571 */ 6572 int smb2_read(struct ksmbd_work *work) 6573 { 6574 struct ksmbd_conn *conn = work->conn; 6575 struct smb2_read_req *req; 6576 struct smb2_read_rsp *rsp; 6577 struct ksmbd_file *fp = NULL; 6578 loff_t offset; 6579 size_t length, mincount; 6580 ssize_t nbytes = 0, remain_bytes = 0; 6581 int err = 0; 6582 bool is_rdma_channel = false; 6583 unsigned int max_read_size = conn->vals->max_read_size; 6584 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6585 void *aux_payload_buf; 6586 6587 if (test_share_config_flag(work->tcon->share_conf, 6588 KSMBD_SHARE_FLAG_PIPE)) { 6589 ksmbd_debug(SMB, "IPC pipe read request\n"); 6590 return smb2_read_pipe(work); 6591 } 6592 6593 if (work->next_smb2_rcv_hdr_off) { 6594 req = ksmbd_req_buf_next(work); 6595 rsp = ksmbd_resp_buf_next(work); 6596 if (!has_file_id(req->VolatileFileId)) { 6597 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6598 work->compound_fid); 6599 id = work->compound_fid; 6600 pid = work->compound_pfid; 6601 } 6602 } else { 6603 req = smb2_get_msg(work->request_buf); 6604 rsp = smb2_get_msg(work->response_buf); 6605 } 6606 6607 if (!has_file_id(id)) { 6608 id = req->VolatileFileId; 6609 pid = req->PersistentFileId; 6610 } 6611 6612 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6613 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6614 is_rdma_channel = true; 6615 max_read_size = get_smbd_max_read_write_size(); 6616 } 6617 6618 if (is_rdma_channel == true) { 6619 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6620 6621 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6622 err = -EINVAL; 6623 goto out; 6624 } 6625 err = smb2_set_remote_key_for_rdma(work, 6626 (struct smb2_buffer_desc_v1 *) 6627 ((char *)req + ch_offset), 6628 req->Channel, 6629 req->ReadChannelInfoLength); 6630 if (err) 6631 goto out; 6632 } 6633 6634 fp = ksmbd_lookup_fd_slow(work, id, pid); 6635 if (!fp) { 6636 err = -ENOENT; 6637 goto out; 6638 } 6639 6640 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6641 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6642 err = -EACCES; 6643 goto out; 6644 } 6645 6646 offset = le64_to_cpu(req->Offset); 6647 length = le32_to_cpu(req->Length); 6648 mincount = le32_to_cpu(req->MinimumCount); 6649 6650 if (length > max_read_size) { 6651 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6652 max_read_size); 6653 err = -EINVAL; 6654 goto out; 6655 } 6656 6657 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6658 fp->filp, offset, length); 6659 6660 aux_payload_buf = kvzalloc(length, GFP_KERNEL); 6661 if (!aux_payload_buf) { 6662 err = -ENOMEM; 6663 goto out; 6664 } 6665 6666 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6667 if (nbytes < 0) { 6668 err = nbytes; 6669 goto out; 6670 } 6671 6672 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6673 kvfree(aux_payload_buf); 6674 rsp->hdr.Status = STATUS_END_OF_FILE; 6675 smb2_set_err_rsp(work); 6676 ksmbd_fd_put(work, fp); 6677 return 0; 6678 } 6679 6680 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6681 nbytes, offset, mincount); 6682 6683 if (is_rdma_channel == true) { 6684 /* write data to the client using rdma channel */ 6685 remain_bytes = smb2_read_rdma_channel(work, req, 6686 aux_payload_buf, 6687 nbytes); 6688 kvfree(aux_payload_buf); 6689 aux_payload_buf = NULL; 6690 nbytes = 0; 6691 if (remain_bytes < 0) { 6692 err = (int)remain_bytes; 6693 goto out; 6694 } 6695 } 6696 6697 rsp->StructureSize = cpu_to_le16(17); 6698 rsp->DataOffset = 80; 6699 rsp->Reserved = 0; 6700 rsp->DataLength = cpu_to_le32(nbytes); 6701 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6702 rsp->Flags = 0; 6703 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6704 offsetof(struct smb2_read_rsp, Buffer), 6705 aux_payload_buf, nbytes); 6706 if (err) { 6707 kvfree(aux_payload_buf); 6708 goto out; 6709 } 6710 ksmbd_fd_put(work, fp); 6711 return 0; 6712 6713 out: 6714 if (err) { 6715 if (err == -EISDIR) 6716 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6717 else if (err == -EAGAIN) 6718 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6719 else if (err == -ENOENT) 6720 rsp->hdr.Status = STATUS_FILE_CLOSED; 6721 else if (err == -EACCES) 6722 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6723 else if (err == -ESHARE) 6724 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6725 else if (err == -EINVAL) 6726 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6727 else 6728 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6729 6730 smb2_set_err_rsp(work); 6731 } 6732 ksmbd_fd_put(work, fp); 6733 return err; 6734 } 6735 6736 /** 6737 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6738 * @work: smb work containing write IPC pipe command buffer 6739 * 6740 * Return: 0 on success, otherwise error 6741 */ 6742 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6743 { 6744 struct smb2_write_req *req; 6745 struct smb2_write_rsp *rsp; 6746 struct ksmbd_rpc_command *rpc_resp; 6747 u64 id = 0; 6748 int err = 0, ret = 0; 6749 char *data_buf; 6750 size_t length; 6751 6752 WORK_BUFFERS(work, req, rsp); 6753 6754 length = le32_to_cpu(req->Length); 6755 id = req->VolatileFileId; 6756 6757 if ((u64)le16_to_cpu(req->DataOffset) + length > 6758 get_rfc1002_len(work->request_buf)) { 6759 pr_err("invalid write data offset %u, smb_len %u\n", 6760 le16_to_cpu(req->DataOffset), 6761 get_rfc1002_len(work->request_buf)); 6762 err = -EINVAL; 6763 goto out; 6764 } 6765 6766 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6767 le16_to_cpu(req->DataOffset)); 6768 6769 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6770 if (rpc_resp) { 6771 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6772 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6773 kvfree(rpc_resp); 6774 smb2_set_err_rsp(work); 6775 return -EOPNOTSUPP; 6776 } 6777 if (rpc_resp->flags != KSMBD_RPC_OK) { 6778 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6779 smb2_set_err_rsp(work); 6780 kvfree(rpc_resp); 6781 return ret; 6782 } 6783 kvfree(rpc_resp); 6784 } 6785 6786 rsp->StructureSize = cpu_to_le16(17); 6787 rsp->DataOffset = 0; 6788 rsp->Reserved = 0; 6789 rsp->DataLength = cpu_to_le32(length); 6790 rsp->DataRemaining = 0; 6791 rsp->Reserved2 = 0; 6792 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6793 offsetof(struct smb2_write_rsp, Buffer)); 6794 out: 6795 if (err) { 6796 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6797 smb2_set_err_rsp(work); 6798 } 6799 6800 return err; 6801 } 6802 6803 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6804 struct smb2_write_req *req, 6805 struct ksmbd_file *fp, 6806 loff_t offset, size_t length, bool sync) 6807 { 6808 char *data_buf; 6809 int ret; 6810 ssize_t nbytes; 6811 6812 data_buf = kvzalloc(length, GFP_KERNEL); 6813 if (!data_buf) 6814 return -ENOMEM; 6815 6816 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6817 (struct smb2_buffer_desc_v1 *) 6818 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6819 le16_to_cpu(req->WriteChannelInfoLength)); 6820 if (ret < 0) { 6821 kvfree(data_buf); 6822 return ret; 6823 } 6824 6825 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 6826 kvfree(data_buf); 6827 if (ret < 0) 6828 return ret; 6829 6830 return nbytes; 6831 } 6832 6833 /** 6834 * smb2_write() - handler for smb2 write from file 6835 * @work: smb work containing write command buffer 6836 * 6837 * Return: 0 on success, otherwise error 6838 */ 6839 int smb2_write(struct ksmbd_work *work) 6840 { 6841 struct smb2_write_req *req; 6842 struct smb2_write_rsp *rsp; 6843 struct ksmbd_file *fp = NULL; 6844 loff_t offset; 6845 size_t length; 6846 ssize_t nbytes; 6847 char *data_buf; 6848 bool writethrough = false, is_rdma_channel = false; 6849 int err = 0; 6850 unsigned int max_write_size = work->conn->vals->max_write_size; 6851 6852 WORK_BUFFERS(work, req, rsp); 6853 6854 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 6855 ksmbd_debug(SMB, "IPC pipe write request\n"); 6856 return smb2_write_pipe(work); 6857 } 6858 6859 offset = le64_to_cpu(req->Offset); 6860 length = le32_to_cpu(req->Length); 6861 6862 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 6863 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 6864 is_rdma_channel = true; 6865 max_write_size = get_smbd_max_read_write_size(); 6866 length = le32_to_cpu(req->RemainingBytes); 6867 } 6868 6869 if (is_rdma_channel == true) { 6870 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 6871 6872 if (req->Length != 0 || req->DataOffset != 0 || 6873 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 6874 err = -EINVAL; 6875 goto out; 6876 } 6877 err = smb2_set_remote_key_for_rdma(work, 6878 (struct smb2_buffer_desc_v1 *) 6879 ((char *)req + ch_offset), 6880 req->Channel, 6881 req->WriteChannelInfoLength); 6882 if (err) 6883 goto out; 6884 } 6885 6886 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6887 ksmbd_debug(SMB, "User does not have write permission\n"); 6888 err = -EACCES; 6889 goto out; 6890 } 6891 6892 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6893 if (!fp) { 6894 err = -ENOENT; 6895 goto out; 6896 } 6897 6898 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6899 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 6900 err = -EACCES; 6901 goto out; 6902 } 6903 6904 if (length > max_write_size) { 6905 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 6906 max_write_size); 6907 err = -EINVAL; 6908 goto out; 6909 } 6910 6911 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 6912 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 6913 writethrough = true; 6914 6915 if (is_rdma_channel == false) { 6916 if (le16_to_cpu(req->DataOffset) < 6917 offsetof(struct smb2_write_req, Buffer)) { 6918 err = -EINVAL; 6919 goto out; 6920 } 6921 6922 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6923 le16_to_cpu(req->DataOffset)); 6924 6925 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6926 fp->filp, offset, length); 6927 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 6928 writethrough, &nbytes); 6929 if (err < 0) 6930 goto out; 6931 } else { 6932 /* read data from the client using rdma channel, and 6933 * write the data. 6934 */ 6935 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 6936 writethrough); 6937 if (nbytes < 0) { 6938 err = (int)nbytes; 6939 goto out; 6940 } 6941 } 6942 6943 rsp->StructureSize = cpu_to_le16(17); 6944 rsp->DataOffset = 0; 6945 rsp->Reserved = 0; 6946 rsp->DataLength = cpu_to_le32(nbytes); 6947 rsp->DataRemaining = 0; 6948 rsp->Reserved2 = 0; 6949 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 6950 if (err) 6951 goto out; 6952 ksmbd_fd_put(work, fp); 6953 return 0; 6954 6955 out: 6956 if (err == -EAGAIN) 6957 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6958 else if (err == -ENOSPC || err == -EFBIG) 6959 rsp->hdr.Status = STATUS_DISK_FULL; 6960 else if (err == -ENOENT) 6961 rsp->hdr.Status = STATUS_FILE_CLOSED; 6962 else if (err == -EACCES) 6963 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6964 else if (err == -ESHARE) 6965 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6966 else if (err == -EINVAL) 6967 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6968 else 6969 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6970 6971 smb2_set_err_rsp(work); 6972 ksmbd_fd_put(work, fp); 6973 return err; 6974 } 6975 6976 /** 6977 * smb2_flush() - handler for smb2 flush file - fsync 6978 * @work: smb work containing flush command buffer 6979 * 6980 * Return: 0 on success, otherwise error 6981 */ 6982 int smb2_flush(struct ksmbd_work *work) 6983 { 6984 struct smb2_flush_req *req; 6985 struct smb2_flush_rsp *rsp; 6986 int err; 6987 6988 WORK_BUFFERS(work, req, rsp); 6989 6990 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); 6991 6992 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 6993 if (err) 6994 goto out; 6995 6996 rsp->StructureSize = cpu_to_le16(4); 6997 rsp->Reserved = 0; 6998 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 6999 7000 out: 7001 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7002 smb2_set_err_rsp(work); 7003 return err; 7004 } 7005 7006 /** 7007 * smb2_cancel() - handler for smb2 cancel command 7008 * @work: smb work containing cancel command buffer 7009 * 7010 * Return: 0 on success, otherwise error 7011 */ 7012 int smb2_cancel(struct ksmbd_work *work) 7013 { 7014 struct ksmbd_conn *conn = work->conn; 7015 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 7016 struct smb2_hdr *chdr; 7017 struct ksmbd_work *iter; 7018 struct list_head *command_list; 7019 7020 if (work->next_smb2_rcv_hdr_off) 7021 hdr = ksmbd_resp_buf_next(work); 7022 7023 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 7024 hdr->MessageId, hdr->Flags); 7025 7026 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 7027 command_list = &conn->async_requests; 7028 7029 spin_lock(&conn->request_lock); 7030 list_for_each_entry(iter, command_list, 7031 async_request_entry) { 7032 chdr = smb2_get_msg(iter->request_buf); 7033 7034 if (iter->async_id != 7035 le64_to_cpu(hdr->Id.AsyncId)) 7036 continue; 7037 7038 ksmbd_debug(SMB, 7039 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 7040 le64_to_cpu(hdr->Id.AsyncId), 7041 le16_to_cpu(chdr->Command)); 7042 iter->state = KSMBD_WORK_CANCELLED; 7043 if (iter->cancel_fn) 7044 iter->cancel_fn(iter->cancel_argv); 7045 break; 7046 } 7047 spin_unlock(&conn->request_lock); 7048 } else { 7049 command_list = &conn->requests; 7050 7051 spin_lock(&conn->request_lock); 7052 list_for_each_entry(iter, command_list, request_entry) { 7053 chdr = smb2_get_msg(iter->request_buf); 7054 7055 if (chdr->MessageId != hdr->MessageId || 7056 iter == work) 7057 continue; 7058 7059 ksmbd_debug(SMB, 7060 "smb2 with mid %llu cancelled command = 0x%x\n", 7061 le64_to_cpu(hdr->MessageId), 7062 le16_to_cpu(chdr->Command)); 7063 iter->state = KSMBD_WORK_CANCELLED; 7064 break; 7065 } 7066 spin_unlock(&conn->request_lock); 7067 } 7068 7069 /* For SMB2_CANCEL command itself send no response*/ 7070 work->send_no_response = 1; 7071 return 0; 7072 } 7073 7074 struct file_lock *smb_flock_init(struct file *f) 7075 { 7076 struct file_lock *fl; 7077 7078 fl = locks_alloc_lock(); 7079 if (!fl) 7080 goto out; 7081 7082 locks_init_lock(fl); 7083 7084 fl->c.flc_owner = f; 7085 fl->c.flc_pid = current->tgid; 7086 fl->c.flc_file = f; 7087 fl->c.flc_flags = FL_POSIX; 7088 fl->fl_ops = NULL; 7089 fl->fl_lmops = NULL; 7090 7091 out: 7092 return fl; 7093 } 7094 7095 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 7096 { 7097 int cmd = -EINVAL; 7098 7099 /* Checking for wrong flag combination during lock request*/ 7100 switch (flags) { 7101 case SMB2_LOCKFLAG_SHARED: 7102 ksmbd_debug(SMB, "received shared request\n"); 7103 cmd = F_SETLKW; 7104 flock->c.flc_type = F_RDLCK; 7105 flock->c.flc_flags |= FL_SLEEP; 7106 break; 7107 case SMB2_LOCKFLAG_EXCLUSIVE: 7108 ksmbd_debug(SMB, "received exclusive request\n"); 7109 cmd = F_SETLKW; 7110 flock->c.flc_type = F_WRLCK; 7111 flock->c.flc_flags |= FL_SLEEP; 7112 break; 7113 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7114 ksmbd_debug(SMB, 7115 "received shared & fail immediately request\n"); 7116 cmd = F_SETLK; 7117 flock->c.flc_type = F_RDLCK; 7118 break; 7119 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7120 ksmbd_debug(SMB, 7121 "received exclusive & fail immediately request\n"); 7122 cmd = F_SETLK; 7123 flock->c.flc_type = F_WRLCK; 7124 break; 7125 case SMB2_LOCKFLAG_UNLOCK: 7126 ksmbd_debug(SMB, "received unlock request\n"); 7127 flock->c.flc_type = F_UNLCK; 7128 cmd = F_SETLK; 7129 break; 7130 } 7131 7132 return cmd; 7133 } 7134 7135 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 7136 unsigned int cmd, int flags, 7137 struct list_head *lock_list) 7138 { 7139 struct ksmbd_lock *lock; 7140 7141 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); 7142 if (!lock) 7143 return NULL; 7144 7145 lock->cmd = cmd; 7146 lock->fl = flock; 7147 lock->start = flock->fl_start; 7148 lock->end = flock->fl_end; 7149 lock->flags = flags; 7150 if (lock->start == lock->end) 7151 lock->zero_len = 1; 7152 INIT_LIST_HEAD(&lock->clist); 7153 INIT_LIST_HEAD(&lock->flist); 7154 INIT_LIST_HEAD(&lock->llist); 7155 list_add_tail(&lock->llist, lock_list); 7156 7157 return lock; 7158 } 7159 7160 static void smb2_remove_blocked_lock(void **argv) 7161 { 7162 struct file_lock *flock = (struct file_lock *)argv[0]; 7163 7164 ksmbd_vfs_posix_lock_unblock(flock); 7165 locks_wake_up(flock); 7166 } 7167 7168 static inline bool lock_defer_pending(struct file_lock *fl) 7169 { 7170 /* check pending lock waiters */ 7171 return waitqueue_active(&fl->c.flc_wait); 7172 } 7173 7174 /** 7175 * smb2_lock() - handler for smb2 file lock command 7176 * @work: smb work containing lock command buffer 7177 * 7178 * Return: 0 on success, otherwise error 7179 */ 7180 int smb2_lock(struct ksmbd_work *work) 7181 { 7182 struct smb2_lock_req *req; 7183 struct smb2_lock_rsp *rsp; 7184 struct smb2_lock_element *lock_ele; 7185 struct ksmbd_file *fp = NULL; 7186 struct file_lock *flock = NULL; 7187 struct file *filp = NULL; 7188 int lock_count; 7189 int flags = 0; 7190 int cmd = 0; 7191 int err = -EIO, i, rc = 0; 7192 u64 lock_start, lock_length; 7193 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 7194 struct ksmbd_conn *conn; 7195 int nolock = 0; 7196 LIST_HEAD(lock_list); 7197 LIST_HEAD(rollback_list); 7198 int prior_lock = 0; 7199 7200 WORK_BUFFERS(work, req, rsp); 7201 7202 ksmbd_debug(SMB, "Received lock request\n"); 7203 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7204 if (!fp) { 7205 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 7206 err = -ENOENT; 7207 goto out2; 7208 } 7209 7210 filp = fp->filp; 7211 lock_count = le16_to_cpu(req->LockCount); 7212 lock_ele = req->locks; 7213 7214 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 7215 if (!lock_count) { 7216 err = -EINVAL; 7217 goto out2; 7218 } 7219 7220 for (i = 0; i < lock_count; i++) { 7221 flags = le32_to_cpu(lock_ele[i].Flags); 7222 7223 flock = smb_flock_init(filp); 7224 if (!flock) 7225 goto out; 7226 7227 cmd = smb2_set_flock_flags(flock, flags); 7228 7229 lock_start = le64_to_cpu(lock_ele[i].Offset); 7230 lock_length = le64_to_cpu(lock_ele[i].Length); 7231 if (lock_start > U64_MAX - lock_length) { 7232 pr_err("Invalid lock range requested\n"); 7233 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7234 locks_free_lock(flock); 7235 goto out; 7236 } 7237 7238 if (lock_start > OFFSET_MAX) 7239 flock->fl_start = OFFSET_MAX; 7240 else 7241 flock->fl_start = lock_start; 7242 7243 lock_length = le64_to_cpu(lock_ele[i].Length); 7244 if (lock_length > OFFSET_MAX - flock->fl_start) 7245 lock_length = OFFSET_MAX - flock->fl_start; 7246 7247 flock->fl_end = flock->fl_start + lock_length; 7248 7249 if (flock->fl_end < flock->fl_start) { 7250 ksmbd_debug(SMB, 7251 "the end offset(%llx) is smaller than the start offset(%llx)\n", 7252 flock->fl_end, flock->fl_start); 7253 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7254 locks_free_lock(flock); 7255 goto out; 7256 } 7257 7258 /* Check conflict locks in one request */ 7259 list_for_each_entry(cmp_lock, &lock_list, llist) { 7260 if (cmp_lock->fl->fl_start <= flock->fl_start && 7261 cmp_lock->fl->fl_end >= flock->fl_end) { 7262 if (cmp_lock->fl->c.flc_type != F_UNLCK && 7263 flock->c.flc_type != F_UNLCK) { 7264 pr_err("conflict two locks in one request\n"); 7265 err = -EINVAL; 7266 locks_free_lock(flock); 7267 goto out; 7268 } 7269 } 7270 } 7271 7272 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 7273 if (!smb_lock) { 7274 err = -EINVAL; 7275 locks_free_lock(flock); 7276 goto out; 7277 } 7278 } 7279 7280 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7281 if (smb_lock->cmd < 0) { 7282 err = -EINVAL; 7283 goto out; 7284 } 7285 7286 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 7287 err = -EINVAL; 7288 goto out; 7289 } 7290 7291 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 7292 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 7293 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 7294 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 7295 err = -EINVAL; 7296 goto out; 7297 } 7298 7299 prior_lock = smb_lock->flags; 7300 7301 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 7302 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 7303 goto no_check_cl; 7304 7305 nolock = 1; 7306 /* check locks in connection list */ 7307 down_read(&conn_list_lock); 7308 list_for_each_entry(conn, &conn_list, conns_list) { 7309 spin_lock(&conn->llist_lock); 7310 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 7311 if (file_inode(cmp_lock->fl->c.flc_file) != 7312 file_inode(smb_lock->fl->c.flc_file)) 7313 continue; 7314 7315 if (lock_is_unlock(smb_lock->fl)) { 7316 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && 7317 cmp_lock->start == smb_lock->start && 7318 cmp_lock->end == smb_lock->end && 7319 !lock_defer_pending(cmp_lock->fl)) { 7320 nolock = 0; 7321 list_del(&cmp_lock->flist); 7322 list_del(&cmp_lock->clist); 7323 spin_unlock(&conn->llist_lock); 7324 up_read(&conn_list_lock); 7325 7326 locks_free_lock(cmp_lock->fl); 7327 kfree(cmp_lock); 7328 goto out_check_cl; 7329 } 7330 continue; 7331 } 7332 7333 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { 7334 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7335 continue; 7336 } else { 7337 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7338 continue; 7339 } 7340 7341 /* check zero byte lock range */ 7342 if (cmp_lock->zero_len && !smb_lock->zero_len && 7343 cmp_lock->start > smb_lock->start && 7344 cmp_lock->start < smb_lock->end) { 7345 spin_unlock(&conn->llist_lock); 7346 up_read(&conn_list_lock); 7347 pr_err("previous lock conflict with zero byte lock range\n"); 7348 goto out; 7349 } 7350 7351 if (smb_lock->zero_len && !cmp_lock->zero_len && 7352 smb_lock->start > cmp_lock->start && 7353 smb_lock->start < cmp_lock->end) { 7354 spin_unlock(&conn->llist_lock); 7355 up_read(&conn_list_lock); 7356 pr_err("current lock conflict with zero byte lock range\n"); 7357 goto out; 7358 } 7359 7360 if (((cmp_lock->start <= smb_lock->start && 7361 cmp_lock->end > smb_lock->start) || 7362 (cmp_lock->start < smb_lock->end && 7363 cmp_lock->end >= smb_lock->end)) && 7364 !cmp_lock->zero_len && !smb_lock->zero_len) { 7365 spin_unlock(&conn->llist_lock); 7366 up_read(&conn_list_lock); 7367 pr_err("Not allow lock operation on exclusive lock range\n"); 7368 goto out; 7369 } 7370 } 7371 spin_unlock(&conn->llist_lock); 7372 } 7373 up_read(&conn_list_lock); 7374 out_check_cl: 7375 if (lock_is_unlock(smb_lock->fl) && nolock) { 7376 pr_err("Try to unlock nolocked range\n"); 7377 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7378 goto out; 7379 } 7380 7381 no_check_cl: 7382 if (smb_lock->zero_len) { 7383 err = 0; 7384 goto skip; 7385 } 7386 7387 flock = smb_lock->fl; 7388 list_del(&smb_lock->llist); 7389 retry: 7390 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7391 skip: 7392 if (flags & SMB2_LOCKFLAG_UNLOCK) { 7393 if (!rc) { 7394 ksmbd_debug(SMB, "File unlocked\n"); 7395 } else if (rc == -ENOENT) { 7396 rsp->hdr.Status = STATUS_NOT_LOCKED; 7397 goto out; 7398 } 7399 locks_free_lock(flock); 7400 kfree(smb_lock); 7401 } else { 7402 if (rc == FILE_LOCK_DEFERRED) { 7403 void **argv; 7404 7405 ksmbd_debug(SMB, 7406 "would have to wait for getting lock\n"); 7407 list_add(&smb_lock->llist, &rollback_list); 7408 7409 argv = kmalloc(sizeof(void *), GFP_KERNEL); 7410 if (!argv) { 7411 err = -ENOMEM; 7412 goto out; 7413 } 7414 argv[0] = flock; 7415 7416 rc = setup_async_work(work, 7417 smb2_remove_blocked_lock, 7418 argv); 7419 if (rc) { 7420 kfree(argv); 7421 err = -ENOMEM; 7422 goto out; 7423 } 7424 spin_lock(&fp->f_lock); 7425 list_add(&work->fp_entry, &fp->blocked_works); 7426 spin_unlock(&fp->f_lock); 7427 7428 smb2_send_interim_resp(work, STATUS_PENDING); 7429 7430 ksmbd_vfs_posix_lock_wait(flock); 7431 7432 spin_lock(&fp->f_lock); 7433 list_del(&work->fp_entry); 7434 spin_unlock(&fp->f_lock); 7435 7436 if (work->state != KSMBD_WORK_ACTIVE) { 7437 list_del(&smb_lock->llist); 7438 locks_free_lock(flock); 7439 7440 if (work->state == KSMBD_WORK_CANCELLED) { 7441 rsp->hdr.Status = 7442 STATUS_CANCELLED; 7443 kfree(smb_lock); 7444 smb2_send_interim_resp(work, 7445 STATUS_CANCELLED); 7446 work->send_no_response = 1; 7447 goto out; 7448 } 7449 7450 rsp->hdr.Status = 7451 STATUS_RANGE_NOT_LOCKED; 7452 kfree(smb_lock); 7453 goto out2; 7454 } 7455 7456 list_del(&smb_lock->llist); 7457 release_async_work(work); 7458 goto retry; 7459 } else if (!rc) { 7460 list_add(&smb_lock->llist, &rollback_list); 7461 spin_lock(&work->conn->llist_lock); 7462 list_add_tail(&smb_lock->clist, 7463 &work->conn->lock_list); 7464 list_add_tail(&smb_lock->flist, 7465 &fp->lock_list); 7466 spin_unlock(&work->conn->llist_lock); 7467 ksmbd_debug(SMB, "successful in taking lock\n"); 7468 } else { 7469 goto out; 7470 } 7471 } 7472 } 7473 7474 if (atomic_read(&fp->f_ci->op_count) > 1) 7475 smb_break_all_oplock(work, fp); 7476 7477 rsp->StructureSize = cpu_to_le16(4); 7478 ksmbd_debug(SMB, "successful in taking lock\n"); 7479 rsp->hdr.Status = STATUS_SUCCESS; 7480 rsp->Reserved = 0; 7481 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7482 if (err) 7483 goto out; 7484 7485 ksmbd_fd_put(work, fp); 7486 return 0; 7487 7488 out: 7489 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7490 locks_free_lock(smb_lock->fl); 7491 list_del(&smb_lock->llist); 7492 kfree(smb_lock); 7493 } 7494 7495 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7496 struct file_lock *rlock = NULL; 7497 7498 rlock = smb_flock_init(filp); 7499 rlock->c.flc_type = F_UNLCK; 7500 rlock->fl_start = smb_lock->start; 7501 rlock->fl_end = smb_lock->end; 7502 7503 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7504 if (rc) 7505 pr_err("rollback unlock fail : %d\n", rc); 7506 7507 list_del(&smb_lock->llist); 7508 spin_lock(&work->conn->llist_lock); 7509 if (!list_empty(&smb_lock->flist)) 7510 list_del(&smb_lock->flist); 7511 list_del(&smb_lock->clist); 7512 spin_unlock(&work->conn->llist_lock); 7513 7514 locks_free_lock(smb_lock->fl); 7515 locks_free_lock(rlock); 7516 kfree(smb_lock); 7517 } 7518 out2: 7519 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7520 7521 if (!rsp->hdr.Status) { 7522 if (err == -EINVAL) 7523 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7524 else if (err == -ENOMEM) 7525 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7526 else if (err == -ENOENT) 7527 rsp->hdr.Status = STATUS_FILE_CLOSED; 7528 else 7529 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7530 } 7531 7532 smb2_set_err_rsp(work); 7533 ksmbd_fd_put(work, fp); 7534 return err; 7535 } 7536 7537 static int fsctl_copychunk(struct ksmbd_work *work, 7538 struct copychunk_ioctl_req *ci_req, 7539 unsigned int cnt_code, 7540 unsigned int input_count, 7541 unsigned long long volatile_id, 7542 unsigned long long persistent_id, 7543 struct smb2_ioctl_rsp *rsp) 7544 { 7545 struct copychunk_ioctl_rsp *ci_rsp; 7546 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7547 struct srv_copychunk *chunks; 7548 unsigned int i, chunk_count, chunk_count_written = 0; 7549 unsigned int chunk_size_written = 0; 7550 loff_t total_size_written = 0; 7551 int ret = 0; 7552 7553 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7554 7555 rsp->VolatileFileId = volatile_id; 7556 rsp->PersistentFileId = persistent_id; 7557 ci_rsp->ChunksWritten = 7558 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7559 ci_rsp->ChunkBytesWritten = 7560 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7561 ci_rsp->TotalBytesWritten = 7562 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7563 7564 chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; 7565 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7566 if (chunk_count == 0) 7567 goto out; 7568 total_size_written = 0; 7569 7570 /* verify the SRV_COPYCHUNK_COPY packet */ 7571 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7572 input_count < offsetof(struct copychunk_ioctl_req, Chunks) + 7573 chunk_count * sizeof(struct srv_copychunk)) { 7574 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7575 return -EINVAL; 7576 } 7577 7578 for (i = 0; i < chunk_count; i++) { 7579 if (le32_to_cpu(chunks[i].Length) == 0 || 7580 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7581 break; 7582 total_size_written += le32_to_cpu(chunks[i].Length); 7583 } 7584 7585 if (i < chunk_count || 7586 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7587 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7588 return -EINVAL; 7589 } 7590 7591 src_fp = ksmbd_lookup_foreign_fd(work, 7592 le64_to_cpu(ci_req->ResumeKey[0])); 7593 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7594 ret = -EINVAL; 7595 if (!src_fp || 7596 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { 7597 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7598 goto out; 7599 } 7600 7601 if (!dst_fp) { 7602 rsp->hdr.Status = STATUS_FILE_CLOSED; 7603 goto out; 7604 } 7605 7606 /* 7607 * FILE_READ_DATA should only be included in 7608 * the FSCTL_COPYCHUNK case 7609 */ 7610 if (cnt_code == FSCTL_COPYCHUNK && 7611 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7612 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7613 goto out; 7614 } 7615 7616 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7617 chunks, chunk_count, 7618 &chunk_count_written, 7619 &chunk_size_written, 7620 &total_size_written); 7621 if (ret < 0) { 7622 if (ret == -EACCES) 7623 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7624 if (ret == -EAGAIN) 7625 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7626 else if (ret == -EBADF) 7627 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7628 else if (ret == -EFBIG || ret == -ENOSPC) 7629 rsp->hdr.Status = STATUS_DISK_FULL; 7630 else if (ret == -EINVAL) 7631 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7632 else if (ret == -EISDIR) 7633 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7634 else if (ret == -E2BIG) 7635 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7636 else 7637 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7638 } 7639 7640 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7641 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7642 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7643 out: 7644 ksmbd_fd_put(work, src_fp); 7645 ksmbd_fd_put(work, dst_fp); 7646 return ret; 7647 } 7648 7649 static __be32 idev_ipv4_address(struct in_device *idev) 7650 { 7651 __be32 addr = 0; 7652 7653 struct in_ifaddr *ifa; 7654 7655 rcu_read_lock(); 7656 in_dev_for_each_ifa_rcu(ifa, idev) { 7657 if (ifa->ifa_flags & IFA_F_SECONDARY) 7658 continue; 7659 7660 addr = ifa->ifa_address; 7661 break; 7662 } 7663 rcu_read_unlock(); 7664 return addr; 7665 } 7666 7667 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7668 struct smb2_ioctl_rsp *rsp, 7669 unsigned int out_buf_len) 7670 { 7671 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7672 int nbytes = 0; 7673 struct net_device *netdev; 7674 struct sockaddr_storage_rsp *sockaddr_storage; 7675 unsigned int flags; 7676 unsigned long long speed; 7677 7678 rtnl_lock(); 7679 for_each_netdev(&init_net, netdev) { 7680 bool ipv4_set = false; 7681 7682 if (netdev->type == ARPHRD_LOOPBACK) 7683 continue; 7684 7685 flags = dev_get_flags(netdev); 7686 if (!(flags & IFF_RUNNING)) 7687 continue; 7688 ipv6_retry: 7689 if (out_buf_len < 7690 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7691 rtnl_unlock(); 7692 return -ENOSPC; 7693 } 7694 7695 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7696 &rsp->Buffer[nbytes]; 7697 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7698 7699 nii_rsp->Capability = 0; 7700 if (netdev->real_num_tx_queues > 1) 7701 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); 7702 if (ksmbd_rdma_capable_netdev(netdev)) 7703 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); 7704 7705 nii_rsp->Next = cpu_to_le32(152); 7706 nii_rsp->Reserved = 0; 7707 7708 if (netdev->ethtool_ops->get_link_ksettings) { 7709 struct ethtool_link_ksettings cmd; 7710 7711 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7712 speed = cmd.base.speed; 7713 } else { 7714 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7715 "speed is unknown, defaulting to 1Gb/sec"); 7716 speed = SPEED_1000; 7717 } 7718 7719 speed *= 1000000; 7720 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7721 7722 sockaddr_storage = (struct sockaddr_storage_rsp *) 7723 nii_rsp->SockAddr_Storage; 7724 memset(sockaddr_storage, 0, 128); 7725 7726 if (!ipv4_set) { 7727 struct in_device *idev; 7728 7729 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); 7730 sockaddr_storage->addr4.Port = 0; 7731 7732 idev = __in_dev_get_rtnl(netdev); 7733 if (!idev) 7734 continue; 7735 sockaddr_storage->addr4.IPv4address = 7736 idev_ipv4_address(idev); 7737 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7738 ipv4_set = true; 7739 goto ipv6_retry; 7740 } else { 7741 struct inet6_dev *idev6; 7742 struct inet6_ifaddr *ifa; 7743 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; 7744 7745 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); 7746 sockaddr_storage->addr6.Port = 0; 7747 sockaddr_storage->addr6.FlowInfo = 0; 7748 7749 idev6 = __in6_dev_get(netdev); 7750 if (!idev6) 7751 continue; 7752 7753 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7754 if (ifa->flags & (IFA_F_TENTATIVE | 7755 IFA_F_DEPRECATED)) 7756 continue; 7757 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7758 break; 7759 } 7760 sockaddr_storage->addr6.ScopeId = 0; 7761 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7762 } 7763 } 7764 rtnl_unlock(); 7765 7766 /* zero if this is last one */ 7767 if (nii_rsp) 7768 nii_rsp->Next = 0; 7769 7770 rsp->PersistentFileId = SMB2_NO_FID; 7771 rsp->VolatileFileId = SMB2_NO_FID; 7772 return nbytes; 7773 } 7774 7775 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7776 struct validate_negotiate_info_req *neg_req, 7777 struct validate_negotiate_info_rsp *neg_rsp, 7778 unsigned int in_buf_len) 7779 { 7780 int ret = 0; 7781 int dialect; 7782 7783 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7784 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7785 return -EINVAL; 7786 7787 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7788 neg_req->DialectCount); 7789 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7790 ret = -EINVAL; 7791 goto err_out; 7792 } 7793 7794 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7795 ret = -EINVAL; 7796 goto err_out; 7797 } 7798 7799 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7800 ret = -EINVAL; 7801 goto err_out; 7802 } 7803 7804 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7805 ret = -EINVAL; 7806 goto err_out; 7807 } 7808 7809 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 7810 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 7811 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 7812 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 7813 err_out: 7814 return ret; 7815 } 7816 7817 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 7818 struct file_allocated_range_buffer *qar_req, 7819 struct file_allocated_range_buffer *qar_rsp, 7820 unsigned int in_count, unsigned int *out_count) 7821 { 7822 struct ksmbd_file *fp; 7823 loff_t start, length; 7824 int ret = 0; 7825 7826 *out_count = 0; 7827 if (in_count == 0) 7828 return -EINVAL; 7829 7830 start = le64_to_cpu(qar_req->file_offset); 7831 length = le64_to_cpu(qar_req->length); 7832 7833 if (start < 0 || length < 0) 7834 return -EINVAL; 7835 7836 fp = ksmbd_lookup_fd_fast(work, id); 7837 if (!fp) 7838 return -ENOENT; 7839 7840 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 7841 qar_rsp, in_count, out_count); 7842 if (ret && ret != -E2BIG) 7843 *out_count = 0; 7844 7845 ksmbd_fd_put(work, fp); 7846 return ret; 7847 } 7848 7849 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 7850 unsigned int out_buf_len, 7851 struct smb2_ioctl_req *req, 7852 struct smb2_ioctl_rsp *rsp) 7853 { 7854 struct ksmbd_rpc_command *rpc_resp; 7855 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); 7856 int nbytes = 0; 7857 7858 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 7859 le32_to_cpu(req->InputCount)); 7860 if (rpc_resp) { 7861 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 7862 /* 7863 * set STATUS_SOME_NOT_MAPPED response 7864 * for unknown domain sid. 7865 */ 7866 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 7867 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7868 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7869 goto out; 7870 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 7871 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7872 goto out; 7873 } 7874 7875 nbytes = rpc_resp->payload_sz; 7876 if (rpc_resp->payload_sz > out_buf_len) { 7877 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7878 nbytes = out_buf_len; 7879 } 7880 7881 if (!rpc_resp->payload_sz) { 7882 rsp->hdr.Status = 7883 STATUS_UNEXPECTED_IO_ERROR; 7884 goto out; 7885 } 7886 7887 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 7888 } 7889 out: 7890 kvfree(rpc_resp); 7891 return nbytes; 7892 } 7893 7894 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 7895 struct file_sparse *sparse) 7896 { 7897 struct ksmbd_file *fp; 7898 struct mnt_idmap *idmap; 7899 int ret = 0; 7900 __le32 old_fattr; 7901 7902 fp = ksmbd_lookup_fd_fast(work, id); 7903 if (!fp) 7904 return -ENOENT; 7905 idmap = file_mnt_idmap(fp->filp); 7906 7907 old_fattr = fp->f_ci->m_fattr; 7908 if (sparse->SetSparse) 7909 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 7910 else 7911 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 7912 7913 if (fp->f_ci->m_fattr != old_fattr && 7914 test_share_config_flag(work->tcon->share_conf, 7915 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 7916 struct xattr_dos_attrib da; 7917 7918 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 7919 fp->filp->f_path.dentry, &da); 7920 if (ret <= 0) 7921 goto out; 7922 7923 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 7924 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 7925 &fp->filp->f_path, 7926 &da, true); 7927 if (ret) 7928 fp->f_ci->m_fattr = old_fattr; 7929 } 7930 7931 out: 7932 ksmbd_fd_put(work, fp); 7933 return ret; 7934 } 7935 7936 static int fsctl_request_resume_key(struct ksmbd_work *work, 7937 struct smb2_ioctl_req *req, 7938 struct resume_key_ioctl_rsp *key_rsp) 7939 { 7940 struct ksmbd_file *fp; 7941 7942 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7943 if (!fp) 7944 return -ENOENT; 7945 7946 memset(key_rsp, 0, sizeof(*key_rsp)); 7947 key_rsp->ResumeKey[0] = req->VolatileFileId; 7948 key_rsp->ResumeKey[1] = req->PersistentFileId; 7949 ksmbd_fd_put(work, fp); 7950 7951 return 0; 7952 } 7953 7954 /** 7955 * smb2_ioctl() - handler for smb2 ioctl command 7956 * @work: smb work containing ioctl command buffer 7957 * 7958 * Return: 0 on success, otherwise error 7959 */ 7960 int smb2_ioctl(struct ksmbd_work *work) 7961 { 7962 struct smb2_ioctl_req *req; 7963 struct smb2_ioctl_rsp *rsp; 7964 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 7965 u64 id = KSMBD_NO_FID; 7966 struct ksmbd_conn *conn = work->conn; 7967 int ret = 0; 7968 char *buffer; 7969 7970 if (work->next_smb2_rcv_hdr_off) { 7971 req = ksmbd_req_buf_next(work); 7972 rsp = ksmbd_resp_buf_next(work); 7973 if (!has_file_id(req->VolatileFileId)) { 7974 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 7975 work->compound_fid); 7976 id = work->compound_fid; 7977 } 7978 } else { 7979 req = smb2_get_msg(work->request_buf); 7980 rsp = smb2_get_msg(work->response_buf); 7981 } 7982 7983 if (!has_file_id(id)) 7984 id = req->VolatileFileId; 7985 7986 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 7987 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7988 goto out; 7989 } 7990 7991 buffer = (char *)req + le32_to_cpu(req->InputOffset); 7992 7993 cnt_code = le32_to_cpu(req->CtlCode); 7994 ret = smb2_calc_max_out_buf_len(work, 48, 7995 le32_to_cpu(req->MaxOutputResponse)); 7996 if (ret < 0) { 7997 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7998 goto out; 7999 } 8000 out_buf_len = (unsigned int)ret; 8001 in_buf_len = le32_to_cpu(req->InputCount); 8002 8003 switch (cnt_code) { 8004 case FSCTL_DFS_GET_REFERRALS: 8005 case FSCTL_DFS_GET_REFERRALS_EX: 8006 /* Not support DFS yet */ 8007 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 8008 goto out; 8009 case FSCTL_CREATE_OR_GET_OBJECT_ID: 8010 { 8011 struct file_object_buf_type1_ioctl_rsp *obj_buf; 8012 8013 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 8014 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 8015 &rsp->Buffer[0]; 8016 8017 /* 8018 * TODO: This is dummy implementation to pass smbtorture 8019 * Need to check correct response later 8020 */ 8021 memset(obj_buf->ObjectId, 0x0, 16); 8022 memset(obj_buf->BirthVolumeId, 0x0, 16); 8023 memset(obj_buf->BirthObjectId, 0x0, 16); 8024 memset(obj_buf->DomainId, 0x0, 16); 8025 8026 break; 8027 } 8028 case FSCTL_PIPE_TRANSCEIVE: 8029 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 8030 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 8031 break; 8032 case FSCTL_VALIDATE_NEGOTIATE_INFO: 8033 if (conn->dialect < SMB30_PROT_ID) { 8034 ret = -EOPNOTSUPP; 8035 goto out; 8036 } 8037 8038 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 8039 Dialects)) { 8040 ret = -EINVAL; 8041 goto out; 8042 } 8043 8044 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 8045 ret = -EINVAL; 8046 goto out; 8047 } 8048 8049 ret = fsctl_validate_negotiate_info(conn, 8050 (struct validate_negotiate_info_req *)buffer, 8051 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 8052 in_buf_len); 8053 if (ret < 0) 8054 goto out; 8055 8056 nbytes = sizeof(struct validate_negotiate_info_rsp); 8057 rsp->PersistentFileId = SMB2_NO_FID; 8058 rsp->VolatileFileId = SMB2_NO_FID; 8059 break; 8060 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 8061 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 8062 if (ret < 0) 8063 goto out; 8064 nbytes = ret; 8065 break; 8066 case FSCTL_REQUEST_RESUME_KEY: 8067 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 8068 ret = -EINVAL; 8069 goto out; 8070 } 8071 8072 ret = fsctl_request_resume_key(work, req, 8073 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 8074 if (ret < 0) 8075 goto out; 8076 rsp->PersistentFileId = req->PersistentFileId; 8077 rsp->VolatileFileId = req->VolatileFileId; 8078 nbytes = sizeof(struct resume_key_ioctl_rsp); 8079 break; 8080 case FSCTL_COPYCHUNK: 8081 case FSCTL_COPYCHUNK_WRITE: 8082 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8083 ksmbd_debug(SMB, 8084 "User does not have write permission\n"); 8085 ret = -EACCES; 8086 goto out; 8087 } 8088 8089 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { 8090 ret = -EINVAL; 8091 goto out; 8092 } 8093 8094 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 8095 ret = -EINVAL; 8096 goto out; 8097 } 8098 8099 nbytes = sizeof(struct copychunk_ioctl_rsp); 8100 rsp->VolatileFileId = req->VolatileFileId; 8101 rsp->PersistentFileId = req->PersistentFileId; 8102 fsctl_copychunk(work, 8103 (struct copychunk_ioctl_req *)buffer, 8104 le32_to_cpu(req->CtlCode), 8105 le32_to_cpu(req->InputCount), 8106 req->VolatileFileId, 8107 req->PersistentFileId, 8108 rsp); 8109 break; 8110 case FSCTL_SET_SPARSE: 8111 if (in_buf_len < sizeof(struct file_sparse)) { 8112 ret = -EINVAL; 8113 goto out; 8114 } 8115 8116 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); 8117 if (ret < 0) 8118 goto out; 8119 break; 8120 case FSCTL_SET_ZERO_DATA: 8121 { 8122 struct file_zero_data_information *zero_data; 8123 struct ksmbd_file *fp; 8124 loff_t off, len, bfz; 8125 8126 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8127 ksmbd_debug(SMB, 8128 "User does not have write permission\n"); 8129 ret = -EACCES; 8130 goto out; 8131 } 8132 8133 if (in_buf_len < sizeof(struct file_zero_data_information)) { 8134 ret = -EINVAL; 8135 goto out; 8136 } 8137 8138 zero_data = 8139 (struct file_zero_data_information *)buffer; 8140 8141 off = le64_to_cpu(zero_data->FileOffset); 8142 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 8143 if (off < 0 || bfz < 0 || off > bfz) { 8144 ret = -EINVAL; 8145 goto out; 8146 } 8147 8148 len = bfz - off; 8149 if (len) { 8150 fp = ksmbd_lookup_fd_fast(work, id); 8151 if (!fp) { 8152 ret = -ENOENT; 8153 goto out; 8154 } 8155 8156 ret = ksmbd_vfs_zero_data(work, fp, off, len); 8157 ksmbd_fd_put(work, fp); 8158 if (ret < 0) 8159 goto out; 8160 } 8161 break; 8162 } 8163 case FSCTL_QUERY_ALLOCATED_RANGES: 8164 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 8165 ret = -EINVAL; 8166 goto out; 8167 } 8168 8169 ret = fsctl_query_allocated_ranges(work, id, 8170 (struct file_allocated_range_buffer *)buffer, 8171 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 8172 out_buf_len / 8173 sizeof(struct file_allocated_range_buffer), &nbytes); 8174 if (ret == -E2BIG) { 8175 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8176 } else if (ret < 0) { 8177 nbytes = 0; 8178 goto out; 8179 } 8180 8181 nbytes *= sizeof(struct file_allocated_range_buffer); 8182 break; 8183 case FSCTL_GET_REPARSE_POINT: 8184 { 8185 struct reparse_data_buffer *reparse_ptr; 8186 struct ksmbd_file *fp; 8187 8188 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 8189 fp = ksmbd_lookup_fd_fast(work, id); 8190 if (!fp) { 8191 pr_err("not found fp!!\n"); 8192 ret = -ENOENT; 8193 goto out; 8194 } 8195 8196 reparse_ptr->ReparseTag = 8197 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 8198 reparse_ptr->ReparseDataLength = 0; 8199 ksmbd_fd_put(work, fp); 8200 nbytes = sizeof(struct reparse_data_buffer); 8201 break; 8202 } 8203 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 8204 { 8205 struct ksmbd_file *fp_in, *fp_out = NULL; 8206 struct duplicate_extents_to_file *dup_ext; 8207 loff_t src_off, dst_off, length, cloned; 8208 8209 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 8210 ret = -EINVAL; 8211 goto out; 8212 } 8213 8214 dup_ext = (struct duplicate_extents_to_file *)buffer; 8215 8216 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 8217 dup_ext->PersistentFileHandle); 8218 if (!fp_in) { 8219 pr_err("not found file handle in duplicate extent to file\n"); 8220 ret = -ENOENT; 8221 goto out; 8222 } 8223 8224 fp_out = ksmbd_lookup_fd_fast(work, id); 8225 if (!fp_out) { 8226 pr_err("not found fp\n"); 8227 ret = -ENOENT; 8228 goto dup_ext_out; 8229 } 8230 8231 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 8232 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 8233 length = le64_to_cpu(dup_ext->ByteCount); 8234 /* 8235 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 8236 * should fall back to vfs_copy_file_range(). This could be 8237 * beneficial when re-exporting nfs/smb mount, but note that 8238 * this can result in partial copy that returns an error status. 8239 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 8240 * fall back to vfs_copy_file_range(), should be avoided when 8241 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 8242 */ 8243 cloned = vfs_clone_file_range(fp_in->filp, src_off, 8244 fp_out->filp, dst_off, length, 0); 8245 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 8246 ret = -EOPNOTSUPP; 8247 goto dup_ext_out; 8248 } else if (cloned != length) { 8249 cloned = vfs_copy_file_range(fp_in->filp, src_off, 8250 fp_out->filp, dst_off, 8251 length, 0); 8252 if (cloned != length) { 8253 if (cloned < 0) 8254 ret = cloned; 8255 else 8256 ret = -EINVAL; 8257 } 8258 } 8259 8260 dup_ext_out: 8261 ksmbd_fd_put(work, fp_in); 8262 ksmbd_fd_put(work, fp_out); 8263 if (ret < 0) 8264 goto out; 8265 break; 8266 } 8267 default: 8268 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 8269 cnt_code); 8270 ret = -EOPNOTSUPP; 8271 goto out; 8272 } 8273 8274 rsp->CtlCode = cpu_to_le32(cnt_code); 8275 rsp->InputCount = cpu_to_le32(0); 8276 rsp->InputOffset = cpu_to_le32(112); 8277 rsp->OutputOffset = cpu_to_le32(112); 8278 rsp->OutputCount = cpu_to_le32(nbytes); 8279 rsp->StructureSize = cpu_to_le16(49); 8280 rsp->Reserved = cpu_to_le16(0); 8281 rsp->Flags = cpu_to_le32(0); 8282 rsp->Reserved2 = cpu_to_le32(0); 8283 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 8284 if (!ret) 8285 return ret; 8286 8287 out: 8288 if (ret == -EACCES) 8289 rsp->hdr.Status = STATUS_ACCESS_DENIED; 8290 else if (ret == -ENOENT) 8291 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 8292 else if (ret == -EOPNOTSUPP) 8293 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8294 else if (ret == -ENOSPC) 8295 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 8296 else if (ret < 0 || rsp->hdr.Status == 0) 8297 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8298 smb2_set_err_rsp(work); 8299 return 0; 8300 } 8301 8302 /** 8303 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 8304 * @work: smb work containing oplock break command buffer 8305 * 8306 * Return: 0 8307 */ 8308 static void smb20_oplock_break_ack(struct ksmbd_work *work) 8309 { 8310 struct smb2_oplock_break *req; 8311 struct smb2_oplock_break *rsp; 8312 struct ksmbd_file *fp; 8313 struct oplock_info *opinfo = NULL; 8314 __le32 err = 0; 8315 int ret = 0; 8316 u64 volatile_id, persistent_id; 8317 char req_oplevel = 0, rsp_oplevel = 0; 8318 unsigned int oplock_change_type; 8319 8320 WORK_BUFFERS(work, req, rsp); 8321 8322 volatile_id = req->VolatileFid; 8323 persistent_id = req->PersistentFid; 8324 req_oplevel = req->OplockLevel; 8325 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8326 volatile_id, persistent_id, req_oplevel); 8327 8328 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8329 if (!fp) { 8330 rsp->hdr.Status = STATUS_FILE_CLOSED; 8331 smb2_set_err_rsp(work); 8332 return; 8333 } 8334 8335 opinfo = opinfo_get(fp); 8336 if (!opinfo) { 8337 pr_err("unexpected null oplock_info\n"); 8338 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8339 smb2_set_err_rsp(work); 8340 ksmbd_fd_put(work, fp); 8341 return; 8342 } 8343 8344 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8345 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8346 goto err_out; 8347 } 8348 8349 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8350 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8351 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8352 goto err_out; 8353 } 8354 8355 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8356 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8357 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8358 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8359 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8360 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8361 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8362 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8363 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8364 oplock_change_type = OPLOCK_READ_TO_NONE; 8365 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8366 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8367 err = STATUS_INVALID_DEVICE_STATE; 8368 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8369 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8370 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8371 oplock_change_type = OPLOCK_WRITE_TO_READ; 8372 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8373 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8374 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8375 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8376 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8377 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8378 oplock_change_type = OPLOCK_READ_TO_NONE; 8379 } else { 8380 oplock_change_type = 0; 8381 } 8382 } else { 8383 oplock_change_type = 0; 8384 } 8385 8386 switch (oplock_change_type) { 8387 case OPLOCK_WRITE_TO_READ: 8388 ret = opinfo_write_to_read(opinfo); 8389 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8390 break; 8391 case OPLOCK_WRITE_TO_NONE: 8392 ret = opinfo_write_to_none(opinfo); 8393 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8394 break; 8395 case OPLOCK_READ_TO_NONE: 8396 ret = opinfo_read_to_none(opinfo); 8397 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8398 break; 8399 default: 8400 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8401 opinfo->level, rsp_oplevel); 8402 } 8403 8404 if (ret < 0) { 8405 rsp->hdr.Status = err; 8406 goto err_out; 8407 } 8408 8409 opinfo->op_state = OPLOCK_STATE_NONE; 8410 wake_up_interruptible_all(&opinfo->oplock_q); 8411 opinfo_put(opinfo); 8412 ksmbd_fd_put(work, fp); 8413 8414 rsp->StructureSize = cpu_to_le16(24); 8415 rsp->OplockLevel = rsp_oplevel; 8416 rsp->Reserved = 0; 8417 rsp->Reserved2 = 0; 8418 rsp->VolatileFid = volatile_id; 8419 rsp->PersistentFid = persistent_id; 8420 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8421 if (!ret) 8422 return; 8423 8424 err_out: 8425 opinfo->op_state = OPLOCK_STATE_NONE; 8426 wake_up_interruptible_all(&opinfo->oplock_q); 8427 8428 opinfo_put(opinfo); 8429 ksmbd_fd_put(work, fp); 8430 smb2_set_err_rsp(work); 8431 } 8432 8433 static int check_lease_state(struct lease *lease, __le32 req_state) 8434 { 8435 if ((lease->new_state == 8436 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8437 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8438 lease->new_state = req_state; 8439 return 0; 8440 } 8441 8442 if (lease->new_state == req_state) 8443 return 0; 8444 8445 return 1; 8446 } 8447 8448 /** 8449 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8450 * @work: smb work containing lease break command buffer 8451 * 8452 * Return: 0 8453 */ 8454 static void smb21_lease_break_ack(struct ksmbd_work *work) 8455 { 8456 struct ksmbd_conn *conn = work->conn; 8457 struct smb2_lease_ack *req; 8458 struct smb2_lease_ack *rsp; 8459 struct oplock_info *opinfo; 8460 __le32 err = 0; 8461 int ret = 0; 8462 unsigned int lease_change_type; 8463 __le32 lease_state; 8464 struct lease *lease; 8465 8466 WORK_BUFFERS(work, req, rsp); 8467 8468 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8469 le32_to_cpu(req->LeaseState)); 8470 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8471 if (!opinfo) { 8472 ksmbd_debug(OPLOCK, "file not opened\n"); 8473 smb2_set_err_rsp(work); 8474 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8475 return; 8476 } 8477 lease = opinfo->o_lease; 8478 8479 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8480 pr_err("unexpected lease break state 0x%x\n", 8481 opinfo->op_state); 8482 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8483 goto err_out; 8484 } 8485 8486 if (check_lease_state(lease, req->LeaseState)) { 8487 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8488 ksmbd_debug(OPLOCK, 8489 "req lease state: 0x%x, expected state: 0x%x\n", 8490 req->LeaseState, lease->new_state); 8491 goto err_out; 8492 } 8493 8494 if (!atomic_read(&opinfo->breaking_cnt)) { 8495 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8496 goto err_out; 8497 } 8498 8499 /* check for bad lease state */ 8500 if (req->LeaseState & 8501 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8502 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8503 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8504 lease_change_type = OPLOCK_WRITE_TO_NONE; 8505 else 8506 lease_change_type = OPLOCK_READ_TO_NONE; 8507 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8508 le32_to_cpu(lease->state), 8509 le32_to_cpu(req->LeaseState)); 8510 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8511 req->LeaseState != SMB2_LEASE_NONE_LE) { 8512 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8513 lease_change_type = OPLOCK_READ_TO_NONE; 8514 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8515 le32_to_cpu(lease->state), 8516 le32_to_cpu(req->LeaseState)); 8517 } else { 8518 /* valid lease state changes */ 8519 err = STATUS_INVALID_DEVICE_STATE; 8520 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8521 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8522 lease_change_type = OPLOCK_WRITE_TO_NONE; 8523 else 8524 lease_change_type = OPLOCK_READ_TO_NONE; 8525 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8526 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8527 lease_change_type = OPLOCK_WRITE_TO_READ; 8528 else 8529 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8530 } else { 8531 lease_change_type = 0; 8532 } 8533 } 8534 8535 switch (lease_change_type) { 8536 case OPLOCK_WRITE_TO_READ: 8537 ret = opinfo_write_to_read(opinfo); 8538 break; 8539 case OPLOCK_READ_HANDLE_TO_READ: 8540 ret = opinfo_read_handle_to_read(opinfo); 8541 break; 8542 case OPLOCK_WRITE_TO_NONE: 8543 ret = opinfo_write_to_none(opinfo); 8544 break; 8545 case OPLOCK_READ_TO_NONE: 8546 ret = opinfo_read_to_none(opinfo); 8547 break; 8548 default: 8549 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8550 le32_to_cpu(lease->state), 8551 le32_to_cpu(req->LeaseState)); 8552 } 8553 8554 if (ret < 0) { 8555 rsp->hdr.Status = err; 8556 goto err_out; 8557 } 8558 8559 lease_state = lease->state; 8560 opinfo->op_state = OPLOCK_STATE_NONE; 8561 wake_up_interruptible_all(&opinfo->oplock_q); 8562 atomic_dec(&opinfo->breaking_cnt); 8563 wake_up_interruptible_all(&opinfo->oplock_brk); 8564 opinfo_put(opinfo); 8565 8566 rsp->StructureSize = cpu_to_le16(36); 8567 rsp->Reserved = 0; 8568 rsp->Flags = 0; 8569 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8570 rsp->LeaseState = lease_state; 8571 rsp->LeaseDuration = 0; 8572 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8573 if (!ret) 8574 return; 8575 8576 err_out: 8577 wake_up_interruptible_all(&opinfo->oplock_q); 8578 atomic_dec(&opinfo->breaking_cnt); 8579 wake_up_interruptible_all(&opinfo->oplock_brk); 8580 8581 opinfo_put(opinfo); 8582 smb2_set_err_rsp(work); 8583 } 8584 8585 /** 8586 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8587 * @work: smb work containing oplock/lease break command buffer 8588 * 8589 * Return: 0 8590 */ 8591 int smb2_oplock_break(struct ksmbd_work *work) 8592 { 8593 struct smb2_oplock_break *req; 8594 struct smb2_oplock_break *rsp; 8595 8596 WORK_BUFFERS(work, req, rsp); 8597 8598 switch (le16_to_cpu(req->StructureSize)) { 8599 case OP_BREAK_STRUCT_SIZE_20: 8600 smb20_oplock_break_ack(work); 8601 break; 8602 case OP_BREAK_STRUCT_SIZE_21: 8603 smb21_lease_break_ack(work); 8604 break; 8605 default: 8606 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8607 le16_to_cpu(req->StructureSize)); 8608 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8609 smb2_set_err_rsp(work); 8610 } 8611 8612 return 0; 8613 } 8614 8615 /** 8616 * smb2_notify() - handler for smb2 notify request 8617 * @work: smb work containing notify command buffer 8618 * 8619 * Return: 0 8620 */ 8621 int smb2_notify(struct ksmbd_work *work) 8622 { 8623 struct smb2_change_notify_req *req; 8624 struct smb2_change_notify_rsp *rsp; 8625 8626 WORK_BUFFERS(work, req, rsp); 8627 8628 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8629 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8630 smb2_set_err_rsp(work); 8631 return 0; 8632 } 8633 8634 smb2_set_err_rsp(work); 8635 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8636 return 0; 8637 } 8638 8639 /** 8640 * smb2_is_sign_req() - handler for checking packet signing status 8641 * @work: smb work containing notify command buffer 8642 * @command: SMB2 command id 8643 * 8644 * Return: true if packed is signed, false otherwise 8645 */ 8646 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8647 { 8648 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); 8649 8650 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8651 command != SMB2_NEGOTIATE_HE && 8652 command != SMB2_SESSION_SETUP_HE && 8653 command != SMB2_OPLOCK_BREAK_HE) 8654 return true; 8655 8656 return false; 8657 } 8658 8659 /** 8660 * smb2_check_sign_req() - handler for req packet sign processing 8661 * @work: smb work containing notify command buffer 8662 * 8663 * Return: 1 on success, 0 otherwise 8664 */ 8665 int smb2_check_sign_req(struct ksmbd_work *work) 8666 { 8667 struct smb2_hdr *hdr; 8668 char signature_req[SMB2_SIGNATURE_SIZE]; 8669 char signature[SMB2_HMACSHA256_SIZE]; 8670 struct kvec iov[1]; 8671 size_t len; 8672 8673 hdr = smb2_get_msg(work->request_buf); 8674 if (work->next_smb2_rcv_hdr_off) 8675 hdr = ksmbd_req_buf_next(work); 8676 8677 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8678 len = get_rfc1002_len(work->request_buf); 8679 else if (hdr->NextCommand) 8680 len = le32_to_cpu(hdr->NextCommand); 8681 else 8682 len = get_rfc1002_len(work->request_buf) - 8683 work->next_smb2_rcv_hdr_off; 8684 8685 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8686 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8687 8688 iov[0].iov_base = (char *)&hdr->ProtocolId; 8689 iov[0].iov_len = len; 8690 8691 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8692 signature)) 8693 return 0; 8694 8695 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8696 pr_err("bad smb2 signature\n"); 8697 return 0; 8698 } 8699 8700 return 1; 8701 } 8702 8703 /** 8704 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8705 * @work: smb work containing notify command buffer 8706 * 8707 */ 8708 void smb2_set_sign_rsp(struct ksmbd_work *work) 8709 { 8710 struct smb2_hdr *hdr; 8711 char signature[SMB2_HMACSHA256_SIZE]; 8712 struct kvec *iov; 8713 int n_vec = 1; 8714 8715 hdr = ksmbd_resp_buf_curr(work); 8716 hdr->Flags |= SMB2_FLAGS_SIGNED; 8717 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8718 8719 if (hdr->Command == SMB2_READ) { 8720 iov = &work->iov[work->iov_idx - 1]; 8721 n_vec++; 8722 } else { 8723 iov = &work->iov[work->iov_idx]; 8724 } 8725 8726 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8727 signature)) 8728 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8729 } 8730 8731 /** 8732 * smb3_check_sign_req() - handler for req packet sign processing 8733 * @work: smb work containing notify command buffer 8734 * 8735 * Return: 1 on success, 0 otherwise 8736 */ 8737 int smb3_check_sign_req(struct ksmbd_work *work) 8738 { 8739 struct ksmbd_conn *conn = work->conn; 8740 char *signing_key; 8741 struct smb2_hdr *hdr; 8742 struct channel *chann; 8743 char signature_req[SMB2_SIGNATURE_SIZE]; 8744 char signature[SMB2_CMACAES_SIZE]; 8745 struct kvec iov[1]; 8746 size_t len; 8747 8748 hdr = smb2_get_msg(work->request_buf); 8749 if (work->next_smb2_rcv_hdr_off) 8750 hdr = ksmbd_req_buf_next(work); 8751 8752 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8753 len = get_rfc1002_len(work->request_buf); 8754 else if (hdr->NextCommand) 8755 len = le32_to_cpu(hdr->NextCommand); 8756 else 8757 len = get_rfc1002_len(work->request_buf) - 8758 work->next_smb2_rcv_hdr_off; 8759 8760 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8761 signing_key = work->sess->smb3signingkey; 8762 } else { 8763 chann = lookup_chann_list(work->sess, conn); 8764 if (!chann) { 8765 return 0; 8766 } 8767 signing_key = chann->smb3signingkey; 8768 } 8769 8770 if (!signing_key) { 8771 pr_err("SMB3 signing key is not generated\n"); 8772 return 0; 8773 } 8774 8775 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8776 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8777 iov[0].iov_base = (char *)&hdr->ProtocolId; 8778 iov[0].iov_len = len; 8779 8780 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8781 return 0; 8782 8783 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8784 pr_err("bad smb2 signature\n"); 8785 return 0; 8786 } 8787 8788 return 1; 8789 } 8790 8791 /** 8792 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8793 * @work: smb work containing notify command buffer 8794 * 8795 */ 8796 void smb3_set_sign_rsp(struct ksmbd_work *work) 8797 { 8798 struct ksmbd_conn *conn = work->conn; 8799 struct smb2_hdr *hdr; 8800 struct channel *chann; 8801 char signature[SMB2_CMACAES_SIZE]; 8802 struct kvec *iov; 8803 int n_vec = 1; 8804 char *signing_key; 8805 8806 hdr = ksmbd_resp_buf_curr(work); 8807 8808 if (conn->binding == false && 8809 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8810 signing_key = work->sess->smb3signingkey; 8811 } else { 8812 chann = lookup_chann_list(work->sess, work->conn); 8813 if (!chann) { 8814 return; 8815 } 8816 signing_key = chann->smb3signingkey; 8817 } 8818 8819 if (!signing_key) 8820 return; 8821 8822 hdr->Flags |= SMB2_FLAGS_SIGNED; 8823 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8824 8825 if (hdr->Command == SMB2_READ) { 8826 iov = &work->iov[work->iov_idx - 1]; 8827 n_vec++; 8828 } else { 8829 iov = &work->iov[work->iov_idx]; 8830 } 8831 8832 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 8833 signature)) 8834 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8835 } 8836 8837 /** 8838 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 8839 * @work: smb work containing response buffer 8840 * 8841 */ 8842 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 8843 { 8844 struct ksmbd_conn *conn = work->conn; 8845 struct ksmbd_session *sess = work->sess; 8846 struct smb2_hdr *req, *rsp; 8847 8848 if (conn->dialect != SMB311_PROT_ID) 8849 return; 8850 8851 WORK_BUFFERS(work, req, rsp); 8852 8853 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 8854 conn->preauth_info) 8855 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8856 conn->preauth_info->Preauth_HashValue); 8857 8858 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 8859 __u8 *hash_value; 8860 8861 if (conn->binding) { 8862 struct preauth_session *preauth_sess; 8863 8864 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 8865 if (!preauth_sess) 8866 return; 8867 hash_value = preauth_sess->Preauth_HashValue; 8868 } else { 8869 hash_value = sess->Preauth_HashValue; 8870 if (!hash_value) 8871 return; 8872 } 8873 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8874 hash_value); 8875 } 8876 } 8877 8878 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 8879 { 8880 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 8881 struct smb2_hdr *hdr = smb2_get_msg(old_buf); 8882 unsigned int orig_len = get_rfc1002_len(old_buf); 8883 8884 /* tr_buf must be cleared by the caller */ 8885 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 8886 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 8887 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 8888 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 8889 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 8890 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 8891 else 8892 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 8893 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 8894 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 8895 inc_rfc1001_len(tr_buf, orig_len); 8896 } 8897 8898 int smb3_encrypt_resp(struct ksmbd_work *work) 8899 { 8900 struct kvec *iov = work->iov; 8901 int rc = -ENOMEM; 8902 void *tr_buf; 8903 8904 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); 8905 if (!tr_buf) 8906 return rc; 8907 8908 /* fill transform header */ 8909 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 8910 8911 iov[0].iov_base = tr_buf; 8912 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8913 work->tr_buf = tr_buf; 8914 8915 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 8916 } 8917 8918 bool smb3_is_transform_hdr(void *buf) 8919 { 8920 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); 8921 8922 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 8923 } 8924 8925 int smb3_decrypt_req(struct ksmbd_work *work) 8926 { 8927 struct ksmbd_session *sess; 8928 char *buf = work->request_buf; 8929 unsigned int pdu_length = get_rfc1002_len(buf); 8930 struct kvec iov[2]; 8931 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 8932 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); 8933 int rc = 0; 8934 8935 if (pdu_length < sizeof(struct smb2_transform_hdr) || 8936 buf_data_size < sizeof(struct smb2_hdr)) { 8937 pr_err("Transform message is too small (%u)\n", 8938 pdu_length); 8939 return -ECONNABORTED; 8940 } 8941 8942 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 8943 pr_err("Transform message is broken\n"); 8944 return -ECONNABORTED; 8945 } 8946 8947 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 8948 if (!sess) { 8949 pr_err("invalid session id(%llx) in transform header\n", 8950 le64_to_cpu(tr_hdr->SessionId)); 8951 return -ECONNABORTED; 8952 } 8953 8954 iov[0].iov_base = buf; 8955 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8956 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 8957 iov[1].iov_len = buf_data_size; 8958 rc = ksmbd_crypt_message(work, iov, 2, 0); 8959 if (rc) 8960 return rc; 8961 8962 memmove(buf + 4, iov[1].iov_base, buf_data_size); 8963 *(__be32 *)buf = cpu_to_be32(buf_data_size); 8964 8965 return rc; 8966 } 8967 8968 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 8969 { 8970 struct ksmbd_conn *conn = work->conn; 8971 struct ksmbd_session *sess = work->sess; 8972 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); 8973 8974 if (conn->dialect < SMB30_PROT_ID) 8975 return false; 8976 8977 if (work->next_smb2_rcv_hdr_off) 8978 rsp = ksmbd_resp_buf_next(work); 8979 8980 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 8981 sess->user && !user_guest(sess->user) && 8982 rsp->Status == STATUS_SUCCESS) 8983 return true; 8984 return false; 8985 } 8986