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 -ENOMEM 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 req = smb2_get_msg(work->request_buf); 539 if ((req->InfoType == SMB2_O_INFO_FILE && 540 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 541 req->FileInfoClass == FILE_ALL_INFORMATION)) || 542 req->InfoType == SMB2_O_INFO_SECURITY) 543 sz = large_sz; 544 } 545 546 /* allocate large response buf for chained commands */ 547 if (le32_to_cpu(hdr->NextCommand) > 0) 548 sz = large_sz; 549 550 work->response_buf = kvzalloc(sz, GFP_KERNEL); 551 if (!work->response_buf) 552 return -ENOMEM; 553 554 work->response_sz = sz; 555 return 0; 556 } 557 558 /** 559 * smb2_check_user_session() - check for valid session for a user 560 * @work: smb work containing smb request buffer 561 * 562 * Return: 0 on success, otherwise error 563 */ 564 int smb2_check_user_session(struct ksmbd_work *work) 565 { 566 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 567 struct ksmbd_conn *conn = work->conn; 568 unsigned int cmd = le16_to_cpu(req_hdr->Command); 569 unsigned long long sess_id; 570 571 /* 572 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 573 * require a session id, so no need to validate user session's for 574 * these commands. 575 */ 576 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 577 cmd == SMB2_SESSION_SETUP_HE) 578 return 0; 579 580 if (!ksmbd_conn_good(conn)) 581 return -EIO; 582 583 sess_id = le64_to_cpu(req_hdr->SessionId); 584 585 /* 586 * If request is not the first in Compound request, 587 * Just validate session id in header with work->sess->id. 588 */ 589 if (work->next_smb2_rcv_hdr_off) { 590 if (!work->sess) { 591 pr_err("The first operation in the compound does not have sess\n"); 592 return -EINVAL; 593 } 594 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 595 pr_err("session id(%llu) is different with the first operation(%lld)\n", 596 sess_id, work->sess->id); 597 return -EINVAL; 598 } 599 return 1; 600 } 601 602 /* Check for validity of user session */ 603 work->sess = ksmbd_session_lookup_all(conn, sess_id); 604 if (work->sess) 605 return 1; 606 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 607 return -ENOENT; 608 } 609 610 static void destroy_previous_session(struct ksmbd_conn *conn, 611 struct ksmbd_user *user, u64 id) 612 { 613 struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id); 614 struct ksmbd_user *prev_user; 615 struct channel *chann; 616 long index; 617 618 if (!prev_sess) 619 return; 620 621 prev_user = prev_sess->user; 622 623 if (!prev_user || 624 strcmp(user->name, prev_user->name) || 625 user->passkey_sz != prev_user->passkey_sz || 626 memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) 627 return; 628 629 prev_sess->state = SMB2_SESSION_EXPIRED; 630 xa_for_each(&prev_sess->ksmbd_chann_list, index, chann) 631 ksmbd_conn_set_exiting(chann->conn); 632 } 633 634 /** 635 * smb2_get_name() - get filename string from on the wire smb format 636 * @src: source buffer 637 * @maxlen: maxlen of source string 638 * @local_nls: nls_table pointer 639 * 640 * Return: matching converted filename on success, otherwise error ptr 641 */ 642 static char * 643 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 644 { 645 char *name; 646 647 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 648 if (IS_ERR(name)) { 649 pr_err("failed to get name %ld\n", PTR_ERR(name)); 650 return name; 651 } 652 653 ksmbd_conv_path_to_unix(name); 654 ksmbd_strip_last_slash(name); 655 return name; 656 } 657 658 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 659 { 660 struct smb2_hdr *rsp_hdr; 661 struct ksmbd_conn *conn = work->conn; 662 int id; 663 664 rsp_hdr = ksmbd_resp_buf_next(work); 665 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 666 667 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 668 if (id < 0) { 669 pr_err("Failed to alloc async message id\n"); 670 return id; 671 } 672 work->asynchronous = true; 673 work->async_id = id; 674 rsp_hdr->Id.AsyncId = cpu_to_le64(id); 675 676 ksmbd_debug(SMB, 677 "Send interim Response to inform async request id : %d\n", 678 work->async_id); 679 680 work->cancel_fn = fn; 681 work->cancel_argv = arg; 682 683 if (list_empty(&work->async_request_entry)) { 684 spin_lock(&conn->request_lock); 685 list_add_tail(&work->async_request_entry, &conn->async_requests); 686 spin_unlock(&conn->request_lock); 687 } 688 689 return 0; 690 } 691 692 void release_async_work(struct ksmbd_work *work) 693 { 694 struct ksmbd_conn *conn = work->conn; 695 696 spin_lock(&conn->request_lock); 697 list_del_init(&work->async_request_entry); 698 spin_unlock(&conn->request_lock); 699 700 work->asynchronous = 0; 701 work->cancel_fn = NULL; 702 kfree(work->cancel_argv); 703 work->cancel_argv = NULL; 704 if (work->async_id) { 705 ksmbd_release_id(&conn->async_ida, work->async_id); 706 work->async_id = 0; 707 } 708 } 709 710 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 711 { 712 struct smb2_hdr *rsp_hdr; 713 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 714 715 if (allocate_interim_rsp_buf(in_work)) { 716 pr_err("smb_allocate_rsp_buf failed!\n"); 717 ksmbd_free_work_struct(in_work); 718 return; 719 } 720 721 in_work->conn = work->conn; 722 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 723 __SMB2_HEADER_STRUCTURE_SIZE); 724 725 rsp_hdr = smb2_get_msg(in_work->response_buf); 726 smb2_set_err_rsp(in_work); 727 rsp_hdr->Status = status; 728 729 ksmbd_conn_write(in_work); 730 ksmbd_free_work_struct(in_work); 731 } 732 733 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 734 { 735 if (S_ISDIR(mode) || S_ISREG(mode)) 736 return 0; 737 738 if (S_ISLNK(mode)) 739 return IO_REPARSE_TAG_LX_SYMLINK_LE; 740 else if (S_ISFIFO(mode)) 741 return IO_REPARSE_TAG_LX_FIFO_LE; 742 else if (S_ISSOCK(mode)) 743 return IO_REPARSE_TAG_AF_UNIX_LE; 744 else if (S_ISCHR(mode)) 745 return IO_REPARSE_TAG_LX_CHR_LE; 746 else if (S_ISBLK(mode)) 747 return IO_REPARSE_TAG_LX_BLK_LE; 748 749 return 0; 750 } 751 752 /** 753 * smb2_get_dos_mode() - get file mode in dos format from unix mode 754 * @stat: kstat containing file mode 755 * @attribute: attribute flags 756 * 757 * Return: converted dos mode 758 */ 759 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 760 { 761 int attr = 0; 762 763 if (S_ISDIR(stat->mode)) { 764 attr = FILE_ATTRIBUTE_DIRECTORY | 765 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 766 } else { 767 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 768 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 769 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 770 FILE_SUPPORTS_SPARSE_FILES)) 771 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 772 773 if (smb2_get_reparse_tag_special_file(stat->mode)) 774 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 775 } 776 777 return attr; 778 } 779 780 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 781 __le16 hash_id) 782 { 783 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 784 pneg_ctxt->DataLength = cpu_to_le16(38); 785 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 786 pneg_ctxt->Reserved = cpu_to_le32(0); 787 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 788 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 789 pneg_ctxt->HashAlgorithms = hash_id; 790 } 791 792 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 793 __le16 cipher_type) 794 { 795 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 796 pneg_ctxt->DataLength = cpu_to_le16(4); 797 pneg_ctxt->Reserved = cpu_to_le32(0); 798 pneg_ctxt->CipherCount = cpu_to_le16(1); 799 pneg_ctxt->Ciphers[0] = cipher_type; 800 } 801 802 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 803 __le16 sign_algo) 804 { 805 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 806 pneg_ctxt->DataLength = 807 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 808 - sizeof(struct smb2_neg_context)); 809 pneg_ctxt->Reserved = cpu_to_le32(0); 810 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 811 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 812 } 813 814 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 815 { 816 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 817 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 818 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 819 pneg_ctxt->Name[0] = 0x93; 820 pneg_ctxt->Name[1] = 0xAD; 821 pneg_ctxt->Name[2] = 0x25; 822 pneg_ctxt->Name[3] = 0x50; 823 pneg_ctxt->Name[4] = 0x9C; 824 pneg_ctxt->Name[5] = 0xB4; 825 pneg_ctxt->Name[6] = 0x11; 826 pneg_ctxt->Name[7] = 0xE7; 827 pneg_ctxt->Name[8] = 0xB4; 828 pneg_ctxt->Name[9] = 0x23; 829 pneg_ctxt->Name[10] = 0x83; 830 pneg_ctxt->Name[11] = 0xDE; 831 pneg_ctxt->Name[12] = 0x96; 832 pneg_ctxt->Name[13] = 0x8B; 833 pneg_ctxt->Name[14] = 0xCD; 834 pneg_ctxt->Name[15] = 0x7C; 835 } 836 837 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 838 struct smb2_negotiate_rsp *rsp) 839 { 840 char * const pneg_ctxt = (char *)rsp + 841 le32_to_cpu(rsp->NegotiateContextOffset); 842 int neg_ctxt_cnt = 1; 843 int ctxt_size; 844 845 ksmbd_debug(SMB, 846 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 847 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 848 conn->preauth_info->Preauth_HashId); 849 ctxt_size = sizeof(struct smb2_preauth_neg_context); 850 851 if (conn->cipher_type) { 852 /* Round to 8 byte boundary */ 853 ctxt_size = round_up(ctxt_size, 8); 854 ksmbd_debug(SMB, 855 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 856 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 857 (pneg_ctxt + ctxt_size), 858 conn->cipher_type); 859 neg_ctxt_cnt++; 860 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 861 } 862 863 /* compression context not yet supported */ 864 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 865 866 if (conn->posix_ext_supported) { 867 ctxt_size = round_up(ctxt_size, 8); 868 ksmbd_debug(SMB, 869 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 870 build_posix_ctxt((struct smb2_posix_neg_context *) 871 (pneg_ctxt + ctxt_size)); 872 neg_ctxt_cnt++; 873 ctxt_size += sizeof(struct smb2_posix_neg_context); 874 } 875 876 if (conn->signing_negotiated) { 877 ctxt_size = round_up(ctxt_size, 8); 878 ksmbd_debug(SMB, 879 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 880 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 881 (pneg_ctxt + ctxt_size), 882 conn->signing_algorithm); 883 neg_ctxt_cnt++; 884 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 885 } 886 887 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 888 return ctxt_size + AUTH_GSS_PADDING; 889 } 890 891 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 892 struct smb2_preauth_neg_context *pneg_ctxt, 893 int ctxt_len) 894 { 895 /* 896 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 897 * which may not be present. Only check for used HashAlgorithms[1]. 898 */ 899 if (ctxt_len < 900 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 901 return STATUS_INVALID_PARAMETER; 902 903 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 904 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 905 906 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 907 return STATUS_SUCCESS; 908 } 909 910 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 911 struct smb2_encryption_neg_context *pneg_ctxt, 912 int ctxt_len) 913 { 914 int cph_cnt; 915 int i, cphs_size; 916 917 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 918 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 919 return; 920 } 921 922 conn->cipher_type = 0; 923 924 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 925 cphs_size = cph_cnt * sizeof(__le16); 926 927 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 928 ctxt_len) { 929 pr_err("Invalid cipher count(%d)\n", cph_cnt); 930 return; 931 } 932 933 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 934 return; 935 936 for (i = 0; i < cph_cnt; i++) { 937 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 938 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 939 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 940 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 941 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 942 pneg_ctxt->Ciphers[i]); 943 conn->cipher_type = pneg_ctxt->Ciphers[i]; 944 break; 945 } 946 } 947 } 948 949 /** 950 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 951 * @conn: smb connection 952 * 953 * Return: true if connection should be encrypted, else false 954 */ 955 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 956 { 957 if (!conn->ops->generate_encryptionkey) 958 return false; 959 960 /* 961 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 962 * SMB 3.1.1 uses the cipher_type field. 963 */ 964 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 965 conn->cipher_type; 966 } 967 968 static void decode_compress_ctxt(struct ksmbd_conn *conn, 969 struct smb2_compression_capabilities_context *pneg_ctxt) 970 { 971 conn->compress_algorithm = SMB3_COMPRESS_NONE; 972 } 973 974 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 975 struct smb2_signing_capabilities *pneg_ctxt, 976 int ctxt_len) 977 { 978 int sign_algo_cnt; 979 int i, sign_alos_size; 980 981 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 982 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 983 return; 984 } 985 986 conn->signing_negotiated = false; 987 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 988 sign_alos_size = sign_algo_cnt * sizeof(__le16); 989 990 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 991 ctxt_len) { 992 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 993 return; 994 } 995 996 for (i = 0; i < sign_algo_cnt; i++) { 997 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 998 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 999 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 1000 pneg_ctxt->SigningAlgorithms[i]); 1001 conn->signing_negotiated = true; 1002 conn->signing_algorithm = 1003 pneg_ctxt->SigningAlgorithms[i]; 1004 break; 1005 } 1006 } 1007 } 1008 1009 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 1010 struct smb2_negotiate_req *req, 1011 unsigned int len_of_smb) 1012 { 1013 /* +4 is to account for the RFC1001 len field */ 1014 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1015 int i = 0, len_of_ctxts; 1016 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1017 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1018 __le32 status = STATUS_INVALID_PARAMETER; 1019 1020 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1021 if (len_of_smb <= offset) { 1022 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1023 return status; 1024 } 1025 1026 len_of_ctxts = len_of_smb - offset; 1027 1028 while (i++ < neg_ctxt_cnt) { 1029 int clen, ctxt_len; 1030 1031 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1032 break; 1033 1034 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1035 clen = le16_to_cpu(pctx->DataLength); 1036 ctxt_len = clen + sizeof(struct smb2_neg_context); 1037 1038 if (ctxt_len > len_of_ctxts) 1039 break; 1040 1041 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1042 ksmbd_debug(SMB, 1043 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1044 if (conn->preauth_info->Preauth_HashId) 1045 break; 1046 1047 status = decode_preauth_ctxt(conn, 1048 (struct smb2_preauth_neg_context *)pctx, 1049 ctxt_len); 1050 if (status != STATUS_SUCCESS) 1051 break; 1052 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1053 ksmbd_debug(SMB, 1054 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1055 if (conn->cipher_type) 1056 break; 1057 1058 decode_encrypt_ctxt(conn, 1059 (struct smb2_encryption_neg_context *)pctx, 1060 ctxt_len); 1061 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1062 ksmbd_debug(SMB, 1063 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1064 if (conn->compress_algorithm) 1065 break; 1066 1067 decode_compress_ctxt(conn, 1068 (struct smb2_compression_capabilities_context *)pctx); 1069 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1070 ksmbd_debug(SMB, 1071 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1072 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1073 ksmbd_debug(SMB, 1074 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1075 conn->posix_ext_supported = true; 1076 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1077 ksmbd_debug(SMB, 1078 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1079 1080 decode_sign_cap_ctxt(conn, 1081 (struct smb2_signing_capabilities *)pctx, 1082 ctxt_len); 1083 } 1084 1085 /* offsets must be 8 byte aligned */ 1086 offset = (ctxt_len + 7) & ~0x7; 1087 len_of_ctxts -= offset; 1088 } 1089 return status; 1090 } 1091 1092 /** 1093 * smb2_handle_negotiate() - handler for smb2 negotiate command 1094 * @work: smb work containing smb request buffer 1095 * 1096 * Return: 0 1097 */ 1098 int smb2_handle_negotiate(struct ksmbd_work *work) 1099 { 1100 struct ksmbd_conn *conn = work->conn; 1101 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); 1102 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); 1103 int rc = 0; 1104 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1105 __le32 status; 1106 1107 ksmbd_debug(SMB, "Received negotiate request\n"); 1108 conn->need_neg = false; 1109 if (ksmbd_conn_good(conn)) { 1110 pr_err("conn->tcp_status is already in CifsGood State\n"); 1111 work->send_no_response = 1; 1112 return rc; 1113 } 1114 1115 smb2_buf_len = get_rfc1002_len(work->request_buf); 1116 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1117 if (smb2_neg_size > smb2_buf_len) { 1118 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1119 rc = -EINVAL; 1120 goto err_out; 1121 } 1122 1123 if (req->DialectCount == 0) { 1124 pr_err("malformed packet\n"); 1125 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1126 rc = -EINVAL; 1127 goto err_out; 1128 } 1129 1130 if (conn->dialect == SMB311_PROT_ID) { 1131 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1132 1133 if (smb2_buf_len < nego_ctxt_off) { 1134 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1135 rc = -EINVAL; 1136 goto err_out; 1137 } 1138 1139 if (smb2_neg_size > nego_ctxt_off) { 1140 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1141 rc = -EINVAL; 1142 goto err_out; 1143 } 1144 1145 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1146 nego_ctxt_off) { 1147 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1148 rc = -EINVAL; 1149 goto err_out; 1150 } 1151 } else { 1152 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1153 smb2_buf_len) { 1154 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1155 rc = -EINVAL; 1156 goto err_out; 1157 } 1158 } 1159 1160 conn->cli_cap = le32_to_cpu(req->Capabilities); 1161 switch (conn->dialect) { 1162 case SMB311_PROT_ID: 1163 conn->preauth_info = 1164 kzalloc(sizeof(struct preauth_integrity_info), 1165 GFP_KERNEL); 1166 if (!conn->preauth_info) { 1167 rc = -ENOMEM; 1168 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1169 goto err_out; 1170 } 1171 1172 status = deassemble_neg_contexts(conn, req, 1173 get_rfc1002_len(work->request_buf)); 1174 if (status != STATUS_SUCCESS) { 1175 pr_err("deassemble_neg_contexts error(0x%x)\n", 1176 status); 1177 rsp->hdr.Status = status; 1178 rc = -EINVAL; 1179 kfree(conn->preauth_info); 1180 conn->preauth_info = NULL; 1181 goto err_out; 1182 } 1183 1184 rc = init_smb3_11_server(conn); 1185 if (rc < 0) { 1186 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1187 kfree(conn->preauth_info); 1188 conn->preauth_info = NULL; 1189 goto err_out; 1190 } 1191 1192 ksmbd_gen_preauth_integrity_hash(conn, 1193 work->request_buf, 1194 conn->preauth_info->Preauth_HashValue); 1195 rsp->NegotiateContextOffset = 1196 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1197 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1198 break; 1199 case SMB302_PROT_ID: 1200 init_smb3_02_server(conn); 1201 break; 1202 case SMB30_PROT_ID: 1203 init_smb3_0_server(conn); 1204 break; 1205 case SMB21_PROT_ID: 1206 init_smb2_1_server(conn); 1207 break; 1208 case SMB2X_PROT_ID: 1209 case BAD_PROT_ID: 1210 default: 1211 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1212 conn->dialect); 1213 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1214 rc = -EINVAL; 1215 goto err_out; 1216 } 1217 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 1218 1219 /* For stats */ 1220 conn->connection_type = conn->dialect; 1221 1222 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1223 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1224 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1225 1226 memcpy(conn->ClientGUID, req->ClientGUID, 1227 SMB2_CLIENT_GUID_SIZE); 1228 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1229 1230 rsp->StructureSize = cpu_to_le16(65); 1231 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1232 /* Not setting conn guid rsp->ServerGUID, as it 1233 * not used by client for identifying server 1234 */ 1235 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1236 1237 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1238 rsp->ServerStartTime = 0; 1239 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1240 le32_to_cpu(rsp->NegotiateContextOffset), 1241 le16_to_cpu(rsp->NegotiateContextCount)); 1242 1243 rsp->SecurityBufferOffset = cpu_to_le16(128); 1244 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1245 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1246 le16_to_cpu(rsp->SecurityBufferOffset)); 1247 1248 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1249 conn->use_spnego = true; 1250 1251 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1252 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1253 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1254 conn->sign = true; 1255 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1256 server_conf.enforced_signing = true; 1257 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1258 conn->sign = true; 1259 } 1260 1261 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1262 ksmbd_conn_set_need_negotiate(conn); 1263 1264 err_out: 1265 if (rc) 1266 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1267 1268 if (!rc) 1269 rc = ksmbd_iov_pin_rsp(work, rsp, 1270 sizeof(struct smb2_negotiate_rsp) + 1271 AUTH_GSS_LENGTH + neg_ctxt_len); 1272 if (rc < 0) 1273 smb2_set_err_rsp(work); 1274 return rc; 1275 } 1276 1277 static int alloc_preauth_hash(struct ksmbd_session *sess, 1278 struct ksmbd_conn *conn) 1279 { 1280 if (sess->Preauth_HashValue) 1281 return 0; 1282 1283 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1284 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); 1285 if (!sess->Preauth_HashValue) 1286 return -ENOMEM; 1287 1288 return 0; 1289 } 1290 1291 static int generate_preauth_hash(struct ksmbd_work *work) 1292 { 1293 struct ksmbd_conn *conn = work->conn; 1294 struct ksmbd_session *sess = work->sess; 1295 u8 *preauth_hash; 1296 1297 if (conn->dialect != SMB311_PROT_ID) 1298 return 0; 1299 1300 if (conn->binding) { 1301 struct preauth_session *preauth_sess; 1302 1303 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1304 if (!preauth_sess) { 1305 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1306 if (!preauth_sess) 1307 return -ENOMEM; 1308 } 1309 1310 preauth_hash = preauth_sess->Preauth_HashValue; 1311 } else { 1312 if (!sess->Preauth_HashValue) 1313 if (alloc_preauth_hash(sess, conn)) 1314 return -ENOMEM; 1315 preauth_hash = sess->Preauth_HashValue; 1316 } 1317 1318 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1319 return 0; 1320 } 1321 1322 static int decode_negotiation_token(struct ksmbd_conn *conn, 1323 struct negotiate_message *negblob, 1324 size_t sz) 1325 { 1326 if (!conn->use_spnego) 1327 return -EINVAL; 1328 1329 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1330 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1331 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1332 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1333 conn->use_spnego = false; 1334 } 1335 } 1336 return 0; 1337 } 1338 1339 static int ntlm_negotiate(struct ksmbd_work *work, 1340 struct negotiate_message *negblob, 1341 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1342 { 1343 struct challenge_message *chgblob; 1344 unsigned char *spnego_blob = NULL; 1345 u16 spnego_blob_len; 1346 char *neg_blob; 1347 int sz, rc; 1348 1349 ksmbd_debug(SMB, "negotiate phase\n"); 1350 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1351 if (rc) 1352 return rc; 1353 1354 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1355 chgblob = 1356 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); 1357 memset(chgblob, 0, sizeof(struct challenge_message)); 1358 1359 if (!work->conn->use_spnego) { 1360 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1361 if (sz < 0) 1362 return -ENOMEM; 1363 1364 rsp->SecurityBufferLength = cpu_to_le16(sz); 1365 return 0; 1366 } 1367 1368 sz = sizeof(struct challenge_message); 1369 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1370 1371 neg_blob = kzalloc(sz, GFP_KERNEL); 1372 if (!neg_blob) 1373 return -ENOMEM; 1374 1375 chgblob = (struct challenge_message *)neg_blob; 1376 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1377 if (sz < 0) { 1378 rc = -ENOMEM; 1379 goto out; 1380 } 1381 1382 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1383 neg_blob, sz); 1384 if (rc) { 1385 rc = -ENOMEM; 1386 goto out; 1387 } 1388 1389 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1390 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1391 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1392 1393 out: 1394 kfree(spnego_blob); 1395 kfree(neg_blob); 1396 return rc; 1397 } 1398 1399 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1400 struct smb2_sess_setup_req *req) 1401 { 1402 int sz; 1403 1404 if (conn->use_spnego && conn->mechToken) 1405 return (struct authenticate_message *)conn->mechToken; 1406 1407 sz = le16_to_cpu(req->SecurityBufferOffset); 1408 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1409 + sz); 1410 } 1411 1412 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1413 struct smb2_sess_setup_req *req) 1414 { 1415 struct authenticate_message *authblob; 1416 struct ksmbd_user *user; 1417 char *name; 1418 unsigned int name_off, name_len, secbuf_len; 1419 1420 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1421 if (secbuf_len < sizeof(struct authenticate_message)) { 1422 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1423 return NULL; 1424 } 1425 authblob = user_authblob(conn, req); 1426 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1427 name_len = le16_to_cpu(authblob->UserName.Length); 1428 1429 if (secbuf_len < (u64)name_off + name_len) 1430 return NULL; 1431 1432 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1433 name_len, 1434 true, 1435 conn->local_nls); 1436 if (IS_ERR(name)) { 1437 pr_err("cannot allocate memory\n"); 1438 return NULL; 1439 } 1440 1441 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1442 user = ksmbd_login_user(name); 1443 kfree(name); 1444 return user; 1445 } 1446 1447 static int ntlm_authenticate(struct ksmbd_work *work, 1448 struct smb2_sess_setup_req *req, 1449 struct smb2_sess_setup_rsp *rsp) 1450 { 1451 struct ksmbd_conn *conn = work->conn; 1452 struct ksmbd_session *sess = work->sess; 1453 struct channel *chann = NULL; 1454 struct ksmbd_user *user; 1455 u64 prev_id; 1456 int sz, rc; 1457 1458 ksmbd_debug(SMB, "authenticate phase\n"); 1459 if (conn->use_spnego) { 1460 unsigned char *spnego_blob; 1461 u16 spnego_blob_len; 1462 1463 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1464 &spnego_blob_len, 1465 0); 1466 if (rc) 1467 return -ENOMEM; 1468 1469 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1470 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1471 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1472 kfree(spnego_blob); 1473 } 1474 1475 user = session_user(conn, req); 1476 if (!user) { 1477 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1478 return -EPERM; 1479 } 1480 1481 /* Check for previous session */ 1482 prev_id = le64_to_cpu(req->PreviousSessionId); 1483 if (prev_id && prev_id != sess->id) 1484 destroy_previous_session(conn, user, prev_id); 1485 1486 if (sess->state == SMB2_SESSION_VALID) { 1487 /* 1488 * Reuse session if anonymous try to connect 1489 * on reauthetication. 1490 */ 1491 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1492 ksmbd_free_user(user); 1493 return 0; 1494 } 1495 1496 if (!ksmbd_compare_user(sess->user, user)) { 1497 ksmbd_free_user(user); 1498 return -EPERM; 1499 } 1500 ksmbd_free_user(user); 1501 } else { 1502 sess->user = user; 1503 } 1504 1505 if (conn->binding == false && user_guest(sess->user)) { 1506 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1507 } else { 1508 struct authenticate_message *authblob; 1509 1510 authblob = user_authblob(conn, req); 1511 sz = le16_to_cpu(req->SecurityBufferLength); 1512 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1513 if (rc) { 1514 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1515 ksmbd_debug(SMB, "authentication failed\n"); 1516 return -EPERM; 1517 } 1518 } 1519 1520 /* 1521 * If session state is SMB2_SESSION_VALID, We can assume 1522 * that it is reauthentication. And the user/password 1523 * has been verified, so return it here. 1524 */ 1525 if (sess->state == SMB2_SESSION_VALID) { 1526 if (conn->binding) 1527 goto binding_session; 1528 return 0; 1529 } 1530 1531 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1532 (conn->sign || server_conf.enforced_signing)) || 1533 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1534 sess->sign = true; 1535 1536 if (smb3_encryption_negotiated(conn) && 1537 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1538 rc = conn->ops->generate_encryptionkey(conn, sess); 1539 if (rc) { 1540 ksmbd_debug(SMB, 1541 "SMB3 encryption key generation failed\n"); 1542 return -EINVAL; 1543 } 1544 sess->enc = true; 1545 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1546 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1547 /* 1548 * signing is disable if encryption is enable 1549 * on this session 1550 */ 1551 sess->sign = false; 1552 } 1553 1554 binding_session: 1555 if (conn->dialect >= SMB30_PROT_ID) { 1556 chann = lookup_chann_list(sess, conn); 1557 if (!chann) { 1558 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1559 if (!chann) 1560 return -ENOMEM; 1561 1562 chann->conn = conn; 1563 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1564 } 1565 } 1566 1567 if (conn->ops->generate_signingkey) { 1568 rc = conn->ops->generate_signingkey(sess, conn); 1569 if (rc) { 1570 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1571 return -EINVAL; 1572 } 1573 } 1574 1575 if (!ksmbd_conn_lookup_dialect(conn)) { 1576 pr_err("fail to verify the dialect\n"); 1577 return -ENOENT; 1578 } 1579 return 0; 1580 } 1581 1582 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1583 static int krb5_authenticate(struct ksmbd_work *work, 1584 struct smb2_sess_setup_req *req, 1585 struct smb2_sess_setup_rsp *rsp) 1586 { 1587 struct ksmbd_conn *conn = work->conn; 1588 struct ksmbd_session *sess = work->sess; 1589 char *in_blob, *out_blob; 1590 struct channel *chann = NULL; 1591 u64 prev_sess_id; 1592 int in_len, out_len; 1593 int retval; 1594 1595 in_blob = (char *)&req->hdr.ProtocolId + 1596 le16_to_cpu(req->SecurityBufferOffset); 1597 in_len = le16_to_cpu(req->SecurityBufferLength); 1598 out_blob = (char *)&rsp->hdr.ProtocolId + 1599 le16_to_cpu(rsp->SecurityBufferOffset); 1600 out_len = work->response_sz - 1601 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1602 1603 /* Check previous session */ 1604 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1605 if (prev_sess_id && prev_sess_id != sess->id) 1606 destroy_previous_session(conn, sess->user, prev_sess_id); 1607 1608 if (sess->state == SMB2_SESSION_VALID) 1609 ksmbd_free_user(sess->user); 1610 1611 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1612 out_blob, &out_len); 1613 if (retval) { 1614 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1615 return -EINVAL; 1616 } 1617 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1618 1619 if ((conn->sign || server_conf.enforced_signing) || 1620 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1621 sess->sign = true; 1622 1623 if (smb3_encryption_negotiated(conn)) { 1624 retval = conn->ops->generate_encryptionkey(conn, sess); 1625 if (retval) { 1626 ksmbd_debug(SMB, 1627 "SMB3 encryption key generation failed\n"); 1628 return -EINVAL; 1629 } 1630 sess->enc = true; 1631 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1632 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1633 sess->sign = false; 1634 } 1635 1636 if (conn->dialect >= SMB30_PROT_ID) { 1637 chann = lookup_chann_list(sess, conn); 1638 if (!chann) { 1639 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1640 if (!chann) 1641 return -ENOMEM; 1642 1643 chann->conn = conn; 1644 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1645 } 1646 } 1647 1648 if (conn->ops->generate_signingkey) { 1649 retval = conn->ops->generate_signingkey(sess, conn); 1650 if (retval) { 1651 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1652 return -EINVAL; 1653 } 1654 } 1655 1656 if (!ksmbd_conn_lookup_dialect(conn)) { 1657 pr_err("fail to verify the dialect\n"); 1658 return -ENOENT; 1659 } 1660 return 0; 1661 } 1662 #else 1663 static int krb5_authenticate(struct ksmbd_work *work, 1664 struct smb2_sess_setup_req *req, 1665 struct smb2_sess_setup_rsp *rsp) 1666 { 1667 return -EOPNOTSUPP; 1668 } 1669 #endif 1670 1671 int smb2_sess_setup(struct ksmbd_work *work) 1672 { 1673 struct ksmbd_conn *conn = work->conn; 1674 struct smb2_sess_setup_req *req; 1675 struct smb2_sess_setup_rsp *rsp; 1676 struct ksmbd_session *sess; 1677 struct negotiate_message *negblob; 1678 unsigned int negblob_len, negblob_off; 1679 int rc = 0; 1680 1681 ksmbd_debug(SMB, "Received request for session setup\n"); 1682 1683 WORK_BUFFERS(work, req, rsp); 1684 1685 rsp->StructureSize = cpu_to_le16(9); 1686 rsp->SessionFlags = 0; 1687 rsp->SecurityBufferOffset = cpu_to_le16(72); 1688 rsp->SecurityBufferLength = 0; 1689 1690 ksmbd_conn_lock(conn); 1691 if (!req->hdr.SessionId) { 1692 sess = ksmbd_smb2_session_create(); 1693 if (!sess) { 1694 rc = -ENOMEM; 1695 goto out_err; 1696 } 1697 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1698 rc = ksmbd_session_register(conn, sess); 1699 if (rc) 1700 goto out_err; 1701 } else if (conn->dialect >= SMB30_PROT_ID && 1702 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1703 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1704 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1705 1706 sess = ksmbd_session_lookup_slowpath(sess_id); 1707 if (!sess) { 1708 rc = -ENOENT; 1709 goto out_err; 1710 } 1711 1712 if (conn->dialect != sess->dialect) { 1713 rc = -EINVAL; 1714 goto out_err; 1715 } 1716 1717 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1718 rc = -EINVAL; 1719 goto out_err; 1720 } 1721 1722 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1723 SMB2_CLIENT_GUID_SIZE)) { 1724 rc = -ENOENT; 1725 goto out_err; 1726 } 1727 1728 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1729 rc = -EACCES; 1730 goto out_err; 1731 } 1732 1733 if (sess->state == SMB2_SESSION_EXPIRED) { 1734 rc = -EFAULT; 1735 goto out_err; 1736 } 1737 1738 if (ksmbd_conn_need_reconnect(conn)) { 1739 rc = -EFAULT; 1740 sess = NULL; 1741 goto out_err; 1742 } 1743 1744 if (ksmbd_session_lookup(conn, sess_id)) { 1745 rc = -EACCES; 1746 goto out_err; 1747 } 1748 1749 if (user_guest(sess->user)) { 1750 rc = -EOPNOTSUPP; 1751 goto out_err; 1752 } 1753 1754 conn->binding = true; 1755 } else if ((conn->dialect < SMB30_PROT_ID || 1756 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1757 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1758 sess = NULL; 1759 rc = -EACCES; 1760 goto out_err; 1761 } else { 1762 sess = ksmbd_session_lookup(conn, 1763 le64_to_cpu(req->hdr.SessionId)); 1764 if (!sess) { 1765 rc = -ENOENT; 1766 goto out_err; 1767 } 1768 1769 if (sess->state == SMB2_SESSION_EXPIRED) { 1770 rc = -EFAULT; 1771 goto out_err; 1772 } 1773 1774 if (ksmbd_conn_need_reconnect(conn)) { 1775 rc = -EFAULT; 1776 sess = NULL; 1777 goto out_err; 1778 } 1779 } 1780 work->sess = sess; 1781 1782 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1783 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1784 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) || 1785 negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1786 rc = -EINVAL; 1787 goto out_err; 1788 } 1789 1790 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1791 negblob_off); 1792 1793 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1794 if (conn->mechToken) 1795 negblob = (struct negotiate_message *)conn->mechToken; 1796 } 1797 1798 if (server_conf.auth_mechs & conn->auth_mechs) { 1799 rc = generate_preauth_hash(work); 1800 if (rc) 1801 goto out_err; 1802 1803 if (conn->preferred_auth_mech & 1804 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1805 rc = krb5_authenticate(work, req, rsp); 1806 if (rc) { 1807 rc = -EINVAL; 1808 goto out_err; 1809 } 1810 1811 if (!ksmbd_conn_need_reconnect(conn)) { 1812 ksmbd_conn_set_good(conn); 1813 sess->state = SMB2_SESSION_VALID; 1814 } 1815 kfree(sess->Preauth_HashValue); 1816 sess->Preauth_HashValue = NULL; 1817 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1818 if (negblob->MessageType == NtLmNegotiate) { 1819 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1820 if (rc) 1821 goto out_err; 1822 rsp->hdr.Status = 1823 STATUS_MORE_PROCESSING_REQUIRED; 1824 } else if (negblob->MessageType == NtLmAuthenticate) { 1825 rc = ntlm_authenticate(work, req, rsp); 1826 if (rc) 1827 goto out_err; 1828 1829 if (!ksmbd_conn_need_reconnect(conn)) { 1830 ksmbd_conn_set_good(conn); 1831 sess->state = SMB2_SESSION_VALID; 1832 } 1833 if (conn->binding) { 1834 struct preauth_session *preauth_sess; 1835 1836 preauth_sess = 1837 ksmbd_preauth_session_lookup(conn, sess->id); 1838 if (preauth_sess) { 1839 list_del(&preauth_sess->preauth_entry); 1840 kfree(preauth_sess); 1841 } 1842 } 1843 kfree(sess->Preauth_HashValue); 1844 sess->Preauth_HashValue = NULL; 1845 } else { 1846 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1847 le32_to_cpu(negblob->MessageType)); 1848 rc = -EINVAL; 1849 } 1850 } else { 1851 /* TODO: need one more negotiation */ 1852 pr_err("Not support the preferred authentication\n"); 1853 rc = -EINVAL; 1854 } 1855 } else { 1856 pr_err("Not support authentication\n"); 1857 rc = -EINVAL; 1858 } 1859 1860 out_err: 1861 if (rc == -EINVAL) 1862 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1863 else if (rc == -ENOENT) 1864 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1865 else if (rc == -EACCES) 1866 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1867 else if (rc == -EFAULT) 1868 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1869 else if (rc == -ENOMEM) 1870 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1871 else if (rc == -EOPNOTSUPP) 1872 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1873 else if (rc) 1874 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1875 1876 if (conn->use_spnego && conn->mechToken) { 1877 kfree(conn->mechToken); 1878 conn->mechToken = NULL; 1879 } 1880 1881 if (rc < 0) { 1882 /* 1883 * SecurityBufferOffset should be set to zero 1884 * in session setup error response. 1885 */ 1886 rsp->SecurityBufferOffset = 0; 1887 1888 if (sess) { 1889 bool try_delay = false; 1890 1891 /* 1892 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1893 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1894 * failure to make it harder to send enough random connection requests 1895 * to break into a server. 1896 */ 1897 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1898 try_delay = true; 1899 1900 sess->last_active = jiffies; 1901 sess->state = SMB2_SESSION_EXPIRED; 1902 if (try_delay) { 1903 ksmbd_conn_set_need_reconnect(conn); 1904 ssleep(5); 1905 ksmbd_conn_set_need_negotiate(conn); 1906 } 1907 } 1908 smb2_set_err_rsp(work); 1909 } else { 1910 unsigned int iov_len; 1911 1912 if (rsp->SecurityBufferLength) 1913 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1914 le16_to_cpu(rsp->SecurityBufferLength); 1915 else 1916 iov_len = sizeof(struct smb2_sess_setup_rsp); 1917 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1918 if (rc) 1919 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1920 } 1921 1922 ksmbd_conn_unlock(conn); 1923 return rc; 1924 } 1925 1926 /** 1927 * smb2_tree_connect() - handler for smb2 tree connect command 1928 * @work: smb work containing smb request buffer 1929 * 1930 * Return: 0 on success, otherwise error 1931 */ 1932 int smb2_tree_connect(struct ksmbd_work *work) 1933 { 1934 struct ksmbd_conn *conn = work->conn; 1935 struct smb2_tree_connect_req *req; 1936 struct smb2_tree_connect_rsp *rsp; 1937 struct ksmbd_session *sess = work->sess; 1938 char *treename = NULL, *name = NULL; 1939 struct ksmbd_tree_conn_status status; 1940 struct ksmbd_share_config *share; 1941 int rc = -EINVAL; 1942 1943 WORK_BUFFERS(work, req, rsp); 1944 1945 treename = smb_strndup_from_utf16(req->Buffer, 1946 le16_to_cpu(req->PathLength), true, 1947 conn->local_nls); 1948 if (IS_ERR(treename)) { 1949 pr_err("treename is NULL\n"); 1950 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1951 goto out_err1; 1952 } 1953 1954 name = ksmbd_extract_sharename(conn->um, treename); 1955 if (IS_ERR(name)) { 1956 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1957 goto out_err1; 1958 } 1959 1960 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 1961 name, treename); 1962 1963 status = ksmbd_tree_conn_connect(conn, sess, name); 1964 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 1965 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 1966 else 1967 goto out_err1; 1968 1969 share = status.tree_conn->share_conf; 1970 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 1971 ksmbd_debug(SMB, "IPC share path request\n"); 1972 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 1973 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1974 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 1975 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 1976 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1977 FILE_SYNCHRONIZE_LE; 1978 } else { 1979 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 1980 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1981 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 1982 if (test_tree_conn_flag(status.tree_conn, 1983 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 1984 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 1985 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 1986 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 1987 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 1988 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1989 FILE_SYNCHRONIZE_LE; 1990 } 1991 } 1992 1993 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 1994 if (conn->posix_ext_supported) 1995 status.tree_conn->posix_extensions = true; 1996 1997 write_lock(&sess->tree_conns_lock); 1998 status.tree_conn->t_state = TREE_CONNECTED; 1999 write_unlock(&sess->tree_conns_lock); 2000 rsp->StructureSize = cpu_to_le16(16); 2001 out_err1: 2002 rsp->Capabilities = 0; 2003 rsp->Reserved = 0; 2004 /* default manual caching */ 2005 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2006 2007 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2008 if (rc) 2009 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2010 2011 if (!IS_ERR(treename)) 2012 kfree(treename); 2013 if (!IS_ERR(name)) 2014 kfree(name); 2015 2016 switch (status.ret) { 2017 case KSMBD_TREE_CONN_STATUS_OK: 2018 rsp->hdr.Status = STATUS_SUCCESS; 2019 rc = 0; 2020 break; 2021 case -ESTALE: 2022 case -ENOENT: 2023 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2024 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2025 break; 2026 case -ENOMEM: 2027 case KSMBD_TREE_CONN_STATUS_NOMEM: 2028 rsp->hdr.Status = STATUS_NO_MEMORY; 2029 break; 2030 case KSMBD_TREE_CONN_STATUS_ERROR: 2031 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2032 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2033 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2034 break; 2035 case -EINVAL: 2036 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2037 break; 2038 default: 2039 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2040 } 2041 2042 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2043 smb2_set_err_rsp(work); 2044 2045 return rc; 2046 } 2047 2048 /** 2049 * smb2_create_open_flags() - convert smb open flags to unix open flags 2050 * @file_present: is file already present 2051 * @access: file access flags 2052 * @disposition: file disposition flags 2053 * @may_flags: set with MAY_ flags 2054 * 2055 * Return: file open flags 2056 */ 2057 static int smb2_create_open_flags(bool file_present, __le32 access, 2058 __le32 disposition, 2059 int *may_flags) 2060 { 2061 int oflags = O_NONBLOCK | O_LARGEFILE; 2062 2063 if (access & FILE_READ_DESIRED_ACCESS_LE && 2064 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2065 oflags |= O_RDWR; 2066 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2067 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2068 oflags |= O_WRONLY; 2069 *may_flags = MAY_OPEN | MAY_WRITE; 2070 } else { 2071 oflags |= O_RDONLY; 2072 *may_flags = MAY_OPEN | MAY_READ; 2073 } 2074 2075 if (access == FILE_READ_ATTRIBUTES_LE) 2076 oflags |= O_PATH; 2077 2078 if (file_present) { 2079 switch (disposition & FILE_CREATE_MASK_LE) { 2080 case FILE_OPEN_LE: 2081 case FILE_CREATE_LE: 2082 break; 2083 case FILE_SUPERSEDE_LE: 2084 case FILE_OVERWRITE_LE: 2085 case FILE_OVERWRITE_IF_LE: 2086 oflags |= O_TRUNC; 2087 break; 2088 default: 2089 break; 2090 } 2091 } else { 2092 switch (disposition & FILE_CREATE_MASK_LE) { 2093 case FILE_SUPERSEDE_LE: 2094 case FILE_CREATE_LE: 2095 case FILE_OPEN_IF_LE: 2096 case FILE_OVERWRITE_IF_LE: 2097 oflags |= O_CREAT; 2098 break; 2099 case FILE_OPEN_LE: 2100 case FILE_OVERWRITE_LE: 2101 oflags &= ~O_CREAT; 2102 break; 2103 default: 2104 break; 2105 } 2106 } 2107 2108 return oflags; 2109 } 2110 2111 /** 2112 * smb2_tree_disconnect() - handler for smb tree connect request 2113 * @work: smb work containing request buffer 2114 * 2115 * Return: 0 2116 */ 2117 int smb2_tree_disconnect(struct ksmbd_work *work) 2118 { 2119 struct smb2_tree_disconnect_rsp *rsp; 2120 struct smb2_tree_disconnect_req *req; 2121 struct ksmbd_session *sess = work->sess; 2122 struct ksmbd_tree_connect *tcon = work->tcon; 2123 int err; 2124 2125 WORK_BUFFERS(work, req, rsp); 2126 2127 ksmbd_debug(SMB, "request\n"); 2128 2129 if (!tcon) { 2130 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2131 2132 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2133 err = -ENOENT; 2134 goto err_out; 2135 } 2136 2137 ksmbd_close_tree_conn_fds(work); 2138 2139 write_lock(&sess->tree_conns_lock); 2140 if (tcon->t_state == TREE_DISCONNECTED) { 2141 write_unlock(&sess->tree_conns_lock); 2142 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2143 err = -ENOENT; 2144 goto err_out; 2145 } 2146 2147 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount)); 2148 tcon->t_state = TREE_DISCONNECTED; 2149 write_unlock(&sess->tree_conns_lock); 2150 2151 err = ksmbd_tree_conn_disconnect(sess, tcon); 2152 if (err) { 2153 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2154 goto err_out; 2155 } 2156 2157 work->tcon = NULL; 2158 2159 rsp->StructureSize = cpu_to_le16(4); 2160 err = ksmbd_iov_pin_rsp(work, rsp, 2161 sizeof(struct smb2_tree_disconnect_rsp)); 2162 if (err) { 2163 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2164 goto err_out; 2165 } 2166 2167 return 0; 2168 2169 err_out: 2170 smb2_set_err_rsp(work); 2171 return err; 2172 2173 } 2174 2175 /** 2176 * smb2_session_logoff() - handler for session log off request 2177 * @work: smb work containing request buffer 2178 * 2179 * Return: 0 2180 */ 2181 int smb2_session_logoff(struct ksmbd_work *work) 2182 { 2183 struct ksmbd_conn *conn = work->conn; 2184 struct smb2_logoff_req *req; 2185 struct smb2_logoff_rsp *rsp; 2186 struct ksmbd_session *sess; 2187 u64 sess_id; 2188 int err; 2189 2190 WORK_BUFFERS(work, req, rsp); 2191 2192 ksmbd_debug(SMB, "request\n"); 2193 2194 ksmbd_conn_lock(conn); 2195 if (!ksmbd_conn_good(conn)) { 2196 ksmbd_conn_unlock(conn); 2197 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2198 smb2_set_err_rsp(work); 2199 return -ENOENT; 2200 } 2201 sess_id = le64_to_cpu(req->hdr.SessionId); 2202 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2203 ksmbd_conn_unlock(conn); 2204 2205 ksmbd_close_session_fds(work); 2206 ksmbd_conn_wait_idle(conn, sess_id); 2207 2208 /* 2209 * Re-lookup session to validate if session is deleted 2210 * while waiting request complete 2211 */ 2212 sess = ksmbd_session_lookup_all(conn, sess_id); 2213 if (ksmbd_tree_conn_session_logoff(sess)) { 2214 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2215 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2216 smb2_set_err_rsp(work); 2217 return -ENOENT; 2218 } 2219 2220 ksmbd_destroy_file_table(&sess->file_table); 2221 sess->state = SMB2_SESSION_EXPIRED; 2222 2223 ksmbd_free_user(sess->user); 2224 sess->user = NULL; 2225 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); 2226 2227 rsp->StructureSize = cpu_to_le16(4); 2228 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2229 if (err) { 2230 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2231 smb2_set_err_rsp(work); 2232 return err; 2233 } 2234 return 0; 2235 } 2236 2237 /** 2238 * create_smb2_pipe() - create IPC pipe 2239 * @work: smb work containing request buffer 2240 * 2241 * Return: 0 on success, otherwise error 2242 */ 2243 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2244 { 2245 struct smb2_create_rsp *rsp; 2246 struct smb2_create_req *req; 2247 int id; 2248 int err; 2249 char *name; 2250 2251 WORK_BUFFERS(work, req, rsp); 2252 2253 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2254 1, work->conn->local_nls); 2255 if (IS_ERR(name)) { 2256 rsp->hdr.Status = STATUS_NO_MEMORY; 2257 err = PTR_ERR(name); 2258 goto out; 2259 } 2260 2261 id = ksmbd_session_rpc_open(work->sess, name); 2262 if (id < 0) { 2263 pr_err("Unable to open RPC pipe: %d\n", id); 2264 err = id; 2265 goto out; 2266 } 2267 2268 rsp->hdr.Status = STATUS_SUCCESS; 2269 rsp->StructureSize = cpu_to_le16(89); 2270 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2271 rsp->Flags = 0; 2272 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2273 2274 rsp->CreationTime = cpu_to_le64(0); 2275 rsp->LastAccessTime = cpu_to_le64(0); 2276 rsp->ChangeTime = cpu_to_le64(0); 2277 rsp->AllocationSize = cpu_to_le64(0); 2278 rsp->EndofFile = cpu_to_le64(0); 2279 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2280 rsp->Reserved2 = 0; 2281 rsp->VolatileFileId = id; 2282 rsp->PersistentFileId = 0; 2283 rsp->CreateContextsOffset = 0; 2284 rsp->CreateContextsLength = 0; 2285 2286 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2287 if (err) 2288 goto out; 2289 2290 kfree(name); 2291 return 0; 2292 2293 out: 2294 switch (err) { 2295 case -EINVAL: 2296 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2297 break; 2298 case -ENOSPC: 2299 case -ENOMEM: 2300 rsp->hdr.Status = STATUS_NO_MEMORY; 2301 break; 2302 } 2303 2304 if (!IS_ERR(name)) 2305 kfree(name); 2306 2307 smb2_set_err_rsp(work); 2308 return err; 2309 } 2310 2311 /** 2312 * smb2_set_ea() - handler for setting extended attributes using set 2313 * info command 2314 * @eabuf: set info command buffer 2315 * @buf_len: set info command buffer length 2316 * @path: dentry path for get ea 2317 * 2318 * Return: 0 on success, otherwise error 2319 */ 2320 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2321 const struct path *path) 2322 { 2323 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2324 char *attr_name = NULL, *value; 2325 int rc = 0; 2326 unsigned int next = 0; 2327 2328 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2329 le16_to_cpu(eabuf->EaValueLength)) 2330 return -EINVAL; 2331 2332 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); 2333 if (!attr_name) 2334 return -ENOMEM; 2335 2336 do { 2337 if (!eabuf->EaNameLength) 2338 goto next; 2339 2340 ksmbd_debug(SMB, 2341 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2342 eabuf->name, eabuf->EaNameLength, 2343 le16_to_cpu(eabuf->EaValueLength), 2344 le32_to_cpu(eabuf->NextEntryOffset)); 2345 2346 if (eabuf->EaNameLength > 2347 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2348 rc = -EINVAL; 2349 break; 2350 } 2351 2352 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2353 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2354 eabuf->EaNameLength); 2355 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2356 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2357 2358 if (!eabuf->EaValueLength) { 2359 rc = ksmbd_vfs_casexattr_len(idmap, 2360 path->dentry, 2361 attr_name, 2362 XATTR_USER_PREFIX_LEN + 2363 eabuf->EaNameLength); 2364 2365 /* delete the EA only when it exits */ 2366 if (rc > 0) { 2367 rc = ksmbd_vfs_remove_xattr(idmap, 2368 path, 2369 attr_name); 2370 2371 if (rc < 0) { 2372 ksmbd_debug(SMB, 2373 "remove xattr failed(%d)\n", 2374 rc); 2375 break; 2376 } 2377 } 2378 2379 /* if the EA doesn't exist, just do nothing. */ 2380 rc = 0; 2381 } else { 2382 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2383 le16_to_cpu(eabuf->EaValueLength), 2384 0, true); 2385 if (rc < 0) { 2386 ksmbd_debug(SMB, 2387 "ksmbd_vfs_setxattr is failed(%d)\n", 2388 rc); 2389 break; 2390 } 2391 } 2392 2393 next: 2394 next = le32_to_cpu(eabuf->NextEntryOffset); 2395 if (next == 0 || buf_len < next) 2396 break; 2397 buf_len -= next; 2398 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2399 if (buf_len < sizeof(struct smb2_ea_info)) { 2400 rc = -EINVAL; 2401 break; 2402 } 2403 2404 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2405 le16_to_cpu(eabuf->EaValueLength)) { 2406 rc = -EINVAL; 2407 break; 2408 } 2409 } while (next != 0); 2410 2411 kfree(attr_name); 2412 return rc; 2413 } 2414 2415 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2416 struct ksmbd_file *fp, 2417 char *stream_name, int s_type) 2418 { 2419 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2420 size_t xattr_stream_size; 2421 char *xattr_stream_name; 2422 int rc; 2423 2424 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2425 &xattr_stream_name, 2426 &xattr_stream_size, 2427 s_type); 2428 if (rc) 2429 return rc; 2430 2431 fp->stream.name = xattr_stream_name; 2432 fp->stream.size = xattr_stream_size; 2433 2434 /* Check if there is stream prefix in xattr space */ 2435 rc = ksmbd_vfs_casexattr_len(idmap, 2436 path->dentry, 2437 xattr_stream_name, 2438 xattr_stream_size); 2439 if (rc >= 0) 2440 return 0; 2441 2442 if (fp->cdoption == FILE_OPEN_LE) { 2443 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2444 return -EBADF; 2445 } 2446 2447 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2448 if (rc < 0) 2449 pr_err("Failed to store XATTR stream name :%d\n", rc); 2450 return 0; 2451 } 2452 2453 static int smb2_remove_smb_xattrs(const struct path *path) 2454 { 2455 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2456 char *name, *xattr_list = NULL; 2457 ssize_t xattr_list_len; 2458 int err = 0; 2459 2460 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2461 if (xattr_list_len < 0) { 2462 goto out; 2463 } else if (!xattr_list_len) { 2464 ksmbd_debug(SMB, "empty xattr in the file\n"); 2465 goto out; 2466 } 2467 2468 for (name = xattr_list; name - xattr_list < xattr_list_len; 2469 name += strlen(name) + 1) { 2470 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2471 2472 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2473 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2474 STREAM_PREFIX_LEN)) { 2475 err = ksmbd_vfs_remove_xattr(idmap, path, 2476 name); 2477 if (err) 2478 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2479 name); 2480 } 2481 } 2482 out: 2483 kvfree(xattr_list); 2484 return err; 2485 } 2486 2487 static int smb2_create_truncate(const struct path *path) 2488 { 2489 int rc = vfs_truncate(path, 0); 2490 2491 if (rc) { 2492 pr_err("vfs_truncate failed, rc %d\n", rc); 2493 return rc; 2494 } 2495 2496 rc = smb2_remove_smb_xattrs(path); 2497 if (rc == -EOPNOTSUPP) 2498 rc = 0; 2499 if (rc) 2500 ksmbd_debug(SMB, 2501 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2502 rc); 2503 return rc; 2504 } 2505 2506 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2507 struct ksmbd_file *fp) 2508 { 2509 struct xattr_dos_attrib da = {0}; 2510 int rc; 2511 2512 if (!test_share_config_flag(tcon->share_conf, 2513 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2514 return; 2515 2516 da.version = 4; 2517 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2518 da.itime = da.create_time = fp->create_time; 2519 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2520 XATTR_DOSINFO_ITIME; 2521 2522 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, false); 2523 if (rc) 2524 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2525 } 2526 2527 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2528 const struct path *path, struct ksmbd_file *fp) 2529 { 2530 struct xattr_dos_attrib da; 2531 int rc; 2532 2533 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2534 2535 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2536 if (!test_share_config_flag(tcon->share_conf, 2537 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2538 return; 2539 2540 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2541 path->dentry, &da); 2542 if (rc > 0) { 2543 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2544 fp->create_time = da.create_time; 2545 fp->itime = da.itime; 2546 } 2547 } 2548 2549 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path, 2550 struct path *path, char *name, int open_flags, 2551 umode_t posix_mode, bool is_dir) 2552 { 2553 struct ksmbd_tree_connect *tcon = work->tcon; 2554 struct ksmbd_share_config *share = tcon->share_conf; 2555 umode_t mode; 2556 int rc; 2557 2558 if (!(open_flags & O_CREAT)) 2559 return -EBADF; 2560 2561 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2562 if (is_dir == true) { 2563 ksmbd_debug(SMB, "creating directory\n"); 2564 2565 mode = share_config_directory_mode(share, posix_mode); 2566 rc = ksmbd_vfs_mkdir(work, name, mode); 2567 if (rc) 2568 return rc; 2569 } else { 2570 ksmbd_debug(SMB, "creating regular file\n"); 2571 2572 mode = share_config_create_mode(share, posix_mode); 2573 rc = ksmbd_vfs_create(work, name, mode); 2574 if (rc) 2575 return rc; 2576 } 2577 2578 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0); 2579 if (rc) { 2580 pr_err("cannot get linux path (%s), err = %d\n", 2581 name, rc); 2582 return rc; 2583 } 2584 return 0; 2585 } 2586 2587 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2588 struct smb2_create_req *req, 2589 const struct path *path) 2590 { 2591 struct create_context *context; 2592 struct create_sd_buf_req *sd_buf; 2593 2594 if (!req->CreateContextsOffset) 2595 return -ENOENT; 2596 2597 /* Parse SD BUFFER create contexts */ 2598 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2599 if (!context) 2600 return -ENOENT; 2601 else if (IS_ERR(context)) 2602 return PTR_ERR(context); 2603 2604 ksmbd_debug(SMB, 2605 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2606 sd_buf = (struct create_sd_buf_req *)context; 2607 if (le16_to_cpu(context->DataOffset) + 2608 le32_to_cpu(context->DataLength) < 2609 sizeof(struct create_sd_buf_req)) 2610 return -EINVAL; 2611 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2612 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2613 } 2614 2615 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2616 struct mnt_idmap *idmap, 2617 struct inode *inode) 2618 { 2619 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2620 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2621 2622 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2623 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2624 fattr->cf_mode = inode->i_mode; 2625 fattr->cf_acls = NULL; 2626 fattr->cf_dacls = NULL; 2627 2628 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2629 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2630 if (S_ISDIR(inode->i_mode)) 2631 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2632 } 2633 } 2634 2635 /** 2636 * smb2_open() - handler for smb file open request 2637 * @work: smb work containing request buffer 2638 * 2639 * Return: 0 on success, otherwise error 2640 */ 2641 int smb2_open(struct ksmbd_work *work) 2642 { 2643 struct ksmbd_conn *conn = work->conn; 2644 struct ksmbd_session *sess = work->sess; 2645 struct ksmbd_tree_connect *tcon = work->tcon; 2646 struct smb2_create_req *req; 2647 struct smb2_create_rsp *rsp; 2648 struct path path, parent_path; 2649 struct ksmbd_share_config *share = tcon->share_conf; 2650 struct ksmbd_file *fp = NULL; 2651 struct file *filp = NULL; 2652 struct mnt_idmap *idmap = NULL; 2653 struct kstat stat; 2654 struct create_context *context; 2655 struct lease_ctx_info *lc = NULL; 2656 struct create_ea_buf_req *ea_buf = NULL; 2657 struct oplock_info *opinfo; 2658 __le32 *next_ptr = NULL; 2659 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2660 int rc = 0; 2661 int contxt_cnt = 0, query_disk_id = 0; 2662 int maximal_access_ctxt = 0, posix_ctxt = 0; 2663 int s_type = 0; 2664 int next_off = 0; 2665 char *name = NULL; 2666 char *stream_name = NULL; 2667 bool file_present = false, created = false, already_permitted = false; 2668 int share_ret, need_truncate = 0; 2669 u64 time; 2670 umode_t posix_mode = 0; 2671 __le32 daccess, maximal_access = 0; 2672 int iov_len = 0; 2673 2674 WORK_BUFFERS(work, req, rsp); 2675 2676 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2677 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2678 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2679 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2680 smb2_set_err_rsp(work); 2681 return -EINVAL; 2682 } 2683 2684 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2685 ksmbd_debug(SMB, "IPC pipe create request\n"); 2686 return create_smb2_pipe(work); 2687 } 2688 2689 if (req->NameLength) { 2690 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2691 *(char *)req->Buffer == '\\') { 2692 pr_err("not allow directory name included leading slash\n"); 2693 rc = -EINVAL; 2694 goto err_out1; 2695 } 2696 2697 name = smb2_get_name(req->Buffer, 2698 le16_to_cpu(req->NameLength), 2699 work->conn->local_nls); 2700 if (IS_ERR(name)) { 2701 rc = PTR_ERR(name); 2702 if (rc != -ENOMEM) 2703 rc = -ENOENT; 2704 name = NULL; 2705 goto err_out1; 2706 } 2707 2708 ksmbd_debug(SMB, "converted name = %s\n", name); 2709 if (strchr(name, ':')) { 2710 if (!test_share_config_flag(work->tcon->share_conf, 2711 KSMBD_SHARE_FLAG_STREAMS)) { 2712 rc = -EBADF; 2713 goto err_out1; 2714 } 2715 rc = parse_stream_name(name, &stream_name, &s_type); 2716 if (rc < 0) 2717 goto err_out1; 2718 } 2719 2720 rc = ksmbd_validate_filename(name); 2721 if (rc < 0) 2722 goto err_out1; 2723 2724 if (ksmbd_share_veto_filename(share, name)) { 2725 rc = -ENOENT; 2726 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2727 name); 2728 goto err_out1; 2729 } 2730 } else { 2731 name = kstrdup("", GFP_KERNEL); 2732 if (!name) { 2733 rc = -ENOMEM; 2734 goto err_out1; 2735 } 2736 } 2737 2738 req_op_level = req->RequestedOplockLevel; 2739 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 2740 lc = parse_lease_state(req); 2741 2742 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 2743 pr_err("Invalid impersonationlevel : 0x%x\n", 2744 le32_to_cpu(req->ImpersonationLevel)); 2745 rc = -EIO; 2746 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 2747 goto err_out1; 2748 } 2749 2750 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 2751 pr_err("Invalid create options : 0x%x\n", 2752 le32_to_cpu(req->CreateOptions)); 2753 rc = -EINVAL; 2754 goto err_out1; 2755 } else { 2756 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 2757 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 2758 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 2759 2760 if (req->CreateOptions & 2761 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 2762 FILE_RESERVE_OPFILTER_LE)) { 2763 rc = -EOPNOTSUPP; 2764 goto err_out1; 2765 } 2766 2767 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2768 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 2769 rc = -EINVAL; 2770 goto err_out1; 2771 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 2772 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 2773 } 2774 } 2775 } 2776 2777 if (le32_to_cpu(req->CreateDisposition) > 2778 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 2779 pr_err("Invalid create disposition : 0x%x\n", 2780 le32_to_cpu(req->CreateDisposition)); 2781 rc = -EINVAL; 2782 goto err_out1; 2783 } 2784 2785 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 2786 pr_err("Invalid desired access : 0x%x\n", 2787 le32_to_cpu(req->DesiredAccess)); 2788 rc = -EACCES; 2789 goto err_out1; 2790 } 2791 2792 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 2793 pr_err("Invalid file attribute : 0x%x\n", 2794 le32_to_cpu(req->FileAttributes)); 2795 rc = -EINVAL; 2796 goto err_out1; 2797 } 2798 2799 if (req->CreateContextsOffset) { 2800 /* Parse non-durable handle create contexts */ 2801 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 2802 if (IS_ERR(context)) { 2803 rc = PTR_ERR(context); 2804 goto err_out1; 2805 } else if (context) { 2806 ea_buf = (struct create_ea_buf_req *)context; 2807 if (le16_to_cpu(context->DataOffset) + 2808 le32_to_cpu(context->DataLength) < 2809 sizeof(struct create_ea_buf_req)) { 2810 rc = -EINVAL; 2811 goto err_out1; 2812 } 2813 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 2814 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2815 rc = -EACCES; 2816 goto err_out1; 2817 } 2818 } 2819 2820 context = smb2_find_context_vals(req, 2821 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 2822 if (IS_ERR(context)) { 2823 rc = PTR_ERR(context); 2824 goto err_out1; 2825 } else if (context) { 2826 ksmbd_debug(SMB, 2827 "get query maximal access context\n"); 2828 maximal_access_ctxt = 1; 2829 } 2830 2831 context = smb2_find_context_vals(req, 2832 SMB2_CREATE_TIMEWARP_REQUEST, 4); 2833 if (IS_ERR(context)) { 2834 rc = PTR_ERR(context); 2835 goto err_out1; 2836 } else if (context) { 2837 ksmbd_debug(SMB, "get timewarp context\n"); 2838 rc = -EBADF; 2839 goto err_out1; 2840 } 2841 2842 if (tcon->posix_extensions) { 2843 context = smb2_find_context_vals(req, 2844 SMB2_CREATE_TAG_POSIX, 16); 2845 if (IS_ERR(context)) { 2846 rc = PTR_ERR(context); 2847 goto err_out1; 2848 } else if (context) { 2849 struct create_posix *posix = 2850 (struct create_posix *)context; 2851 if (le16_to_cpu(context->DataOffset) + 2852 le32_to_cpu(context->DataLength) < 2853 sizeof(struct create_posix) - 4) { 2854 rc = -EINVAL; 2855 goto err_out1; 2856 } 2857 ksmbd_debug(SMB, "get posix context\n"); 2858 2859 posix_mode = le32_to_cpu(posix->Mode); 2860 posix_ctxt = 1; 2861 } 2862 } 2863 } 2864 2865 if (ksmbd_override_fsids(work)) { 2866 rc = -ENOMEM; 2867 goto err_out1; 2868 } 2869 2870 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, 2871 &parent_path, &path, 1); 2872 if (!rc) { 2873 file_present = true; 2874 2875 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 2876 /* 2877 * If file exists with under flags, return access 2878 * denied error. 2879 */ 2880 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 2881 req->CreateDisposition == FILE_OPEN_IF_LE) { 2882 rc = -EACCES; 2883 goto err_out; 2884 } 2885 2886 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2887 ksmbd_debug(SMB, 2888 "User does not have write permission\n"); 2889 rc = -EACCES; 2890 goto err_out; 2891 } 2892 } else if (d_is_symlink(path.dentry)) { 2893 rc = -EACCES; 2894 goto err_out; 2895 } 2896 2897 file_present = true; 2898 idmap = mnt_idmap(path.mnt); 2899 } else { 2900 if (rc != -ENOENT) 2901 goto err_out; 2902 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 2903 name, rc); 2904 rc = 0; 2905 } 2906 2907 if (stream_name) { 2908 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2909 if (s_type == DATA_STREAM) { 2910 rc = -EIO; 2911 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2912 } 2913 } else { 2914 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 2915 s_type == DATA_STREAM) { 2916 rc = -EIO; 2917 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2918 } 2919 } 2920 2921 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 2922 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 2923 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2924 rc = -EIO; 2925 } 2926 2927 if (rc < 0) 2928 goto err_out; 2929 } 2930 2931 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 2932 S_ISDIR(d_inode(path.dentry)->i_mode) && 2933 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2934 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 2935 name, req->CreateOptions); 2936 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2937 rc = -EIO; 2938 goto err_out; 2939 } 2940 2941 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2942 !(req->CreateDisposition == FILE_CREATE_LE) && 2943 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 2944 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2945 rc = -EIO; 2946 goto err_out; 2947 } 2948 2949 if (!stream_name && file_present && 2950 req->CreateDisposition == FILE_CREATE_LE) { 2951 rc = -EEXIST; 2952 goto err_out; 2953 } 2954 2955 daccess = smb_map_generic_desired_access(req->DesiredAccess); 2956 2957 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2958 rc = smb_check_perm_dacl(conn, &path, &daccess, 2959 sess->user->uid); 2960 if (rc) 2961 goto err_out; 2962 } 2963 2964 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 2965 if (!file_present) { 2966 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 2967 } else { 2968 ksmbd_vfs_query_maximal_access(idmap, 2969 path.dentry, 2970 &daccess); 2971 already_permitted = true; 2972 } 2973 maximal_access = daccess; 2974 } 2975 2976 open_flags = smb2_create_open_flags(file_present, daccess, 2977 req->CreateDisposition, 2978 &may_flags); 2979 2980 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2981 if (open_flags & O_CREAT) { 2982 ksmbd_debug(SMB, 2983 "User does not have write permission\n"); 2984 rc = -EACCES; 2985 goto err_out; 2986 } 2987 } 2988 2989 /*create file if not present */ 2990 if (!file_present) { 2991 rc = smb2_creat(work, &parent_path, &path, name, open_flags, 2992 posix_mode, 2993 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 2994 if (rc) { 2995 if (rc == -ENOENT) { 2996 rc = -EIO; 2997 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 2998 } 2999 goto err_out; 3000 } 3001 3002 created = true; 3003 idmap = mnt_idmap(path.mnt); 3004 if (ea_buf) { 3005 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3006 sizeof(struct smb2_ea_info)) { 3007 rc = -EINVAL; 3008 goto err_out; 3009 } 3010 3011 rc = smb2_set_ea(&ea_buf->ea, 3012 le32_to_cpu(ea_buf->ccontext.DataLength), 3013 &path); 3014 if (rc == -EOPNOTSUPP) 3015 rc = 0; 3016 else if (rc) 3017 goto err_out; 3018 } 3019 } else if (!already_permitted) { 3020 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3021 * because execute(search) permission on a parent directory, 3022 * is already granted. 3023 */ 3024 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3025 rc = inode_permission(idmap, 3026 d_inode(path.dentry), 3027 may_flags); 3028 if (rc) 3029 goto err_out; 3030 3031 if ((daccess & FILE_DELETE_LE) || 3032 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3033 rc = inode_permission(idmap, 3034 d_inode(path.dentry->d_parent), 3035 MAY_EXEC | MAY_WRITE); 3036 if (rc) 3037 goto err_out; 3038 } 3039 } 3040 } 3041 3042 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3043 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3044 rc = -EBUSY; 3045 goto err_out; 3046 } 3047 3048 rc = 0; 3049 filp = dentry_open(&path, open_flags, current_cred()); 3050 if (IS_ERR(filp)) { 3051 rc = PTR_ERR(filp); 3052 pr_err("dentry open for dir failed, rc %d\n", rc); 3053 goto err_out; 3054 } 3055 3056 if (file_present) { 3057 if (!(open_flags & O_TRUNC)) 3058 file_info = FILE_OPENED; 3059 else 3060 file_info = FILE_OVERWRITTEN; 3061 3062 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3063 FILE_SUPERSEDE_LE) 3064 file_info = FILE_SUPERSEDED; 3065 } else if (open_flags & O_CREAT) { 3066 file_info = FILE_CREATED; 3067 } 3068 3069 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3070 3071 /* Obtain Volatile-ID */ 3072 fp = ksmbd_open_fd(work, filp); 3073 if (IS_ERR(fp)) { 3074 fput(filp); 3075 rc = PTR_ERR(fp); 3076 fp = NULL; 3077 goto err_out; 3078 } 3079 3080 /* Get Persistent-ID */ 3081 ksmbd_open_durable_fd(fp); 3082 if (!has_file_id(fp->persistent_id)) { 3083 rc = -ENOMEM; 3084 goto err_out; 3085 } 3086 3087 fp->cdoption = req->CreateDisposition; 3088 fp->daccess = daccess; 3089 fp->saccess = req->ShareAccess; 3090 fp->coption = req->CreateOptions; 3091 3092 /* Set default windows and posix acls if creating new file */ 3093 if (created) { 3094 int posix_acl_rc; 3095 struct inode *inode = d_inode(path.dentry); 3096 3097 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3098 &path, 3099 d_inode(path.dentry->d_parent)); 3100 if (posix_acl_rc) 3101 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3102 3103 if (test_share_config_flag(work->tcon->share_conf, 3104 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3105 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3106 sess->user->gid); 3107 } 3108 3109 if (rc) { 3110 rc = smb2_create_sd_buffer(work, req, &path); 3111 if (rc) { 3112 if (posix_acl_rc) 3113 ksmbd_vfs_set_init_posix_acl(idmap, 3114 &path); 3115 3116 if (test_share_config_flag(work->tcon->share_conf, 3117 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3118 struct smb_fattr fattr; 3119 struct smb_ntsd *pntsd; 3120 int pntsd_size, ace_num = 0; 3121 3122 ksmbd_acls_fattr(&fattr, idmap, inode); 3123 if (fattr.cf_acls) 3124 ace_num = fattr.cf_acls->a_count; 3125 if (fattr.cf_dacls) 3126 ace_num += fattr.cf_dacls->a_count; 3127 3128 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3129 sizeof(struct smb_sid) * 3 + 3130 sizeof(struct smb_acl) + 3131 sizeof(struct smb_ace) * ace_num * 2, 3132 GFP_KERNEL); 3133 if (!pntsd) { 3134 posix_acl_release(fattr.cf_acls); 3135 posix_acl_release(fattr.cf_dacls); 3136 goto err_out; 3137 } 3138 3139 rc = build_sec_desc(idmap, 3140 pntsd, NULL, 0, 3141 OWNER_SECINFO | 3142 GROUP_SECINFO | 3143 DACL_SECINFO, 3144 &pntsd_size, &fattr); 3145 posix_acl_release(fattr.cf_acls); 3146 posix_acl_release(fattr.cf_dacls); 3147 if (rc) { 3148 kfree(pntsd); 3149 goto err_out; 3150 } 3151 3152 rc = ksmbd_vfs_set_sd_xattr(conn, 3153 idmap, 3154 &path, 3155 pntsd, 3156 pntsd_size, 3157 false); 3158 kfree(pntsd); 3159 if (rc) 3160 pr_err("failed to store ntacl in xattr : %d\n", 3161 rc); 3162 } 3163 } 3164 } 3165 rc = 0; 3166 } 3167 3168 if (stream_name) { 3169 rc = smb2_set_stream_name_xattr(&path, 3170 fp, 3171 stream_name, 3172 s_type); 3173 if (rc) 3174 goto err_out; 3175 file_info = FILE_CREATED; 3176 } 3177 3178 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3179 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3180 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3181 !fp->attrib_only && !stream_name) { 3182 smb_break_all_oplock(work, fp); 3183 need_truncate = 1; 3184 } 3185 3186 /* fp should be searchable through ksmbd_inode.m_fp_list 3187 * after daccess, saccess, attrib_only, and stream are 3188 * initialized. 3189 */ 3190 write_lock(&fp->f_ci->m_lock); 3191 list_add(&fp->node, &fp->f_ci->m_fp_list); 3192 write_unlock(&fp->f_ci->m_lock); 3193 3194 /* Check delete pending among previous fp before oplock break */ 3195 if (ksmbd_inode_pending_delete(fp)) { 3196 rc = -EBUSY; 3197 goto err_out; 3198 } 3199 3200 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3201 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3202 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3203 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3204 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3205 rc = share_ret; 3206 goto err_out; 3207 } 3208 } else { 3209 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) { 3210 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3211 ksmbd_debug(SMB, 3212 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3213 name, req_op_level, lc->req_state); 3214 rc = find_same_lease_key(sess, fp->f_ci, lc); 3215 if (rc) 3216 goto err_out; 3217 } else if (open_flags == O_RDONLY && 3218 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3219 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3220 req_op_level = SMB2_OPLOCK_LEVEL_II; 3221 3222 rc = smb_grant_oplock(work, req_op_level, 3223 fp->persistent_id, fp, 3224 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3225 lc, share_ret); 3226 if (rc < 0) 3227 goto err_out; 3228 } 3229 3230 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3231 ksmbd_fd_set_delete_on_close(fp, file_info); 3232 3233 if (req->CreateContextsOffset) { 3234 struct create_alloc_size_req *az_req; 3235 3236 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3237 SMB2_CREATE_ALLOCATION_SIZE, 4); 3238 if (IS_ERR(az_req)) { 3239 rc = PTR_ERR(az_req); 3240 goto err_out; 3241 } else if (az_req) { 3242 loff_t alloc_size; 3243 int err; 3244 3245 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3246 le32_to_cpu(az_req->ccontext.DataLength) < 3247 sizeof(struct create_alloc_size_req)) { 3248 rc = -EINVAL; 3249 goto err_out; 3250 } 3251 alloc_size = le64_to_cpu(az_req->AllocationSize); 3252 ksmbd_debug(SMB, 3253 "request smb2 create allocate size : %llu\n", 3254 alloc_size); 3255 smb_break_all_levII_oplock(work, fp, 1); 3256 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3257 alloc_size); 3258 if (err < 0) 3259 ksmbd_debug(SMB, 3260 "vfs_fallocate is failed : %d\n", 3261 err); 3262 } 3263 3264 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3265 if (IS_ERR(context)) { 3266 rc = PTR_ERR(context); 3267 goto err_out; 3268 } else if (context) { 3269 ksmbd_debug(SMB, "get query on disk id context\n"); 3270 query_disk_id = 1; 3271 } 3272 } 3273 3274 rc = ksmbd_vfs_getattr(&path, &stat); 3275 if (rc) 3276 goto err_out; 3277 3278 if (stat.result_mask & STATX_BTIME) 3279 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3280 else 3281 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3282 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3283 fp->f_ci->m_fattr = 3284 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3285 3286 if (!created) 3287 smb2_update_xattrs(tcon, &path, fp); 3288 else 3289 smb2_new_xattrs(tcon, &path, fp); 3290 3291 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3292 3293 rsp->StructureSize = cpu_to_le16(89); 3294 rcu_read_lock(); 3295 opinfo = rcu_dereference(fp->f_opinfo); 3296 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3297 rcu_read_unlock(); 3298 rsp->Flags = 0; 3299 rsp->CreateAction = cpu_to_le32(file_info); 3300 rsp->CreationTime = cpu_to_le64(fp->create_time); 3301 time = ksmbd_UnixTimeToNT(stat.atime); 3302 rsp->LastAccessTime = cpu_to_le64(time); 3303 time = ksmbd_UnixTimeToNT(stat.mtime); 3304 rsp->LastWriteTime = cpu_to_le64(time); 3305 time = ksmbd_UnixTimeToNT(stat.ctime); 3306 rsp->ChangeTime = cpu_to_le64(time); 3307 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3308 cpu_to_le64(stat.blocks << 9); 3309 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3310 rsp->FileAttributes = fp->f_ci->m_fattr; 3311 3312 rsp->Reserved2 = 0; 3313 3314 rsp->PersistentFileId = fp->persistent_id; 3315 rsp->VolatileFileId = fp->volatile_id; 3316 3317 rsp->CreateContextsOffset = 0; 3318 rsp->CreateContextsLength = 0; 3319 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3320 3321 /* If lease is request send lease context response */ 3322 if (opinfo && opinfo->is_lease) { 3323 struct create_context *lease_ccontext; 3324 3325 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3326 name, opinfo->o_lease->state); 3327 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3328 3329 lease_ccontext = (struct create_context *)rsp->Buffer; 3330 contxt_cnt++; 3331 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3332 le32_add_cpu(&rsp->CreateContextsLength, 3333 conn->vals->create_lease_size); 3334 iov_len += conn->vals->create_lease_size; 3335 next_ptr = &lease_ccontext->Next; 3336 next_off = conn->vals->create_lease_size; 3337 } 3338 3339 if (maximal_access_ctxt) { 3340 struct create_context *mxac_ccontext; 3341 3342 if (maximal_access == 0) 3343 ksmbd_vfs_query_maximal_access(idmap, 3344 path.dentry, 3345 &maximal_access); 3346 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3347 le32_to_cpu(rsp->CreateContextsLength)); 3348 contxt_cnt++; 3349 create_mxac_rsp_buf(rsp->Buffer + 3350 le32_to_cpu(rsp->CreateContextsLength), 3351 le32_to_cpu(maximal_access)); 3352 le32_add_cpu(&rsp->CreateContextsLength, 3353 conn->vals->create_mxac_size); 3354 iov_len += conn->vals->create_mxac_size; 3355 if (next_ptr) 3356 *next_ptr = cpu_to_le32(next_off); 3357 next_ptr = &mxac_ccontext->Next; 3358 next_off = conn->vals->create_mxac_size; 3359 } 3360 3361 if (query_disk_id) { 3362 struct create_context *disk_id_ccontext; 3363 3364 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3365 le32_to_cpu(rsp->CreateContextsLength)); 3366 contxt_cnt++; 3367 create_disk_id_rsp_buf(rsp->Buffer + 3368 le32_to_cpu(rsp->CreateContextsLength), 3369 stat.ino, tcon->id); 3370 le32_add_cpu(&rsp->CreateContextsLength, 3371 conn->vals->create_disk_id_size); 3372 iov_len += conn->vals->create_disk_id_size; 3373 if (next_ptr) 3374 *next_ptr = cpu_to_le32(next_off); 3375 next_ptr = &disk_id_ccontext->Next; 3376 next_off = conn->vals->create_disk_id_size; 3377 } 3378 3379 if (posix_ctxt) { 3380 contxt_cnt++; 3381 create_posix_rsp_buf(rsp->Buffer + 3382 le32_to_cpu(rsp->CreateContextsLength), 3383 fp); 3384 le32_add_cpu(&rsp->CreateContextsLength, 3385 conn->vals->create_posix_size); 3386 iov_len += conn->vals->create_posix_size; 3387 if (next_ptr) 3388 *next_ptr = cpu_to_le32(next_off); 3389 } 3390 3391 if (contxt_cnt > 0) { 3392 rsp->CreateContextsOffset = 3393 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3394 } 3395 3396 err_out: 3397 if (file_present || created) 3398 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 3399 3400 if (fp && need_truncate) 3401 rc = smb2_create_truncate(&fp->filp->f_path); 3402 3403 ksmbd_revert_fsids(work); 3404 err_out1: 3405 if (!rc) { 3406 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3407 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3408 } 3409 if (rc) { 3410 if (rc == -EINVAL) 3411 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3412 else if (rc == -EOPNOTSUPP) 3413 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3414 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3415 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3416 else if (rc == -ENOENT) 3417 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3418 else if (rc == -EPERM) 3419 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3420 else if (rc == -EBUSY) 3421 rsp->hdr.Status = STATUS_DELETE_PENDING; 3422 else if (rc == -EBADF) 3423 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3424 else if (rc == -ENOEXEC) 3425 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3426 else if (rc == -ENXIO) 3427 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3428 else if (rc == -EEXIST) 3429 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3430 else if (rc == -EMFILE) 3431 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3432 if (!rsp->hdr.Status) 3433 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3434 3435 if (fp) 3436 ksmbd_fd_put(work, fp); 3437 smb2_set_err_rsp(work); 3438 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3439 } 3440 3441 kfree(name); 3442 kfree(lc); 3443 3444 return 0; 3445 } 3446 3447 static int readdir_info_level_struct_sz(int info_level) 3448 { 3449 switch (info_level) { 3450 case FILE_FULL_DIRECTORY_INFORMATION: 3451 return sizeof(struct file_full_directory_info); 3452 case FILE_BOTH_DIRECTORY_INFORMATION: 3453 return sizeof(struct file_both_directory_info); 3454 case FILE_DIRECTORY_INFORMATION: 3455 return sizeof(struct file_directory_info); 3456 case FILE_NAMES_INFORMATION: 3457 return sizeof(struct file_names_info); 3458 case FILEID_FULL_DIRECTORY_INFORMATION: 3459 return sizeof(struct file_id_full_dir_info); 3460 case FILEID_BOTH_DIRECTORY_INFORMATION: 3461 return sizeof(struct file_id_both_directory_info); 3462 case SMB_FIND_FILE_POSIX_INFO: 3463 return sizeof(struct smb2_posix_info); 3464 default: 3465 return -EOPNOTSUPP; 3466 } 3467 } 3468 3469 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3470 { 3471 switch (info_level) { 3472 case FILE_FULL_DIRECTORY_INFORMATION: 3473 { 3474 struct file_full_directory_info *ffdinfo; 3475 3476 ffdinfo = (struct file_full_directory_info *)d_info->rptr; 3477 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3478 d_info->name = ffdinfo->FileName; 3479 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3480 return 0; 3481 } 3482 case FILE_BOTH_DIRECTORY_INFORMATION: 3483 { 3484 struct file_both_directory_info *fbdinfo; 3485 3486 fbdinfo = (struct file_both_directory_info *)d_info->rptr; 3487 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3488 d_info->name = fbdinfo->FileName; 3489 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3490 return 0; 3491 } 3492 case FILE_DIRECTORY_INFORMATION: 3493 { 3494 struct file_directory_info *fdinfo; 3495 3496 fdinfo = (struct file_directory_info *)d_info->rptr; 3497 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3498 d_info->name = fdinfo->FileName; 3499 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3500 return 0; 3501 } 3502 case FILE_NAMES_INFORMATION: 3503 { 3504 struct file_names_info *fninfo; 3505 3506 fninfo = (struct file_names_info *)d_info->rptr; 3507 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3508 d_info->name = fninfo->FileName; 3509 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3510 return 0; 3511 } 3512 case FILEID_FULL_DIRECTORY_INFORMATION: 3513 { 3514 struct file_id_full_dir_info *dinfo; 3515 3516 dinfo = (struct file_id_full_dir_info *)d_info->rptr; 3517 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3518 d_info->name = dinfo->FileName; 3519 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3520 return 0; 3521 } 3522 case FILEID_BOTH_DIRECTORY_INFORMATION: 3523 { 3524 struct file_id_both_directory_info *fibdinfo; 3525 3526 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3527 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3528 d_info->name = fibdinfo->FileName; 3529 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3530 return 0; 3531 } 3532 case SMB_FIND_FILE_POSIX_INFO: 3533 { 3534 struct smb2_posix_info *posix_info; 3535 3536 posix_info = (struct smb2_posix_info *)d_info->rptr; 3537 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3538 d_info->name = posix_info->name; 3539 d_info->name_len = le32_to_cpu(posix_info->name_len); 3540 return 0; 3541 } 3542 default: 3543 return -EINVAL; 3544 } 3545 } 3546 3547 /** 3548 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3549 * buffer 3550 * @conn: connection instance 3551 * @info_level: smb information level 3552 * @d_info: structure included variables for query dir 3553 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3554 * 3555 * if directory has many entries, find first can't read it fully. 3556 * find next might be called multiple times to read remaining dir entries 3557 * 3558 * Return: 0 on success, otherwise error 3559 */ 3560 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3561 struct ksmbd_dir_info *d_info, 3562 struct ksmbd_kstat *ksmbd_kstat) 3563 { 3564 int next_entry_offset = 0; 3565 char *conv_name; 3566 int conv_len; 3567 void *kstat; 3568 int struct_sz, rc = 0; 3569 3570 conv_name = ksmbd_convert_dir_info_name(d_info, 3571 conn->local_nls, 3572 &conv_len); 3573 if (!conv_name) 3574 return -ENOMEM; 3575 3576 /* Somehow the name has only terminating NULL bytes */ 3577 if (conv_len < 0) { 3578 rc = -EINVAL; 3579 goto free_conv_name; 3580 } 3581 3582 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3583 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3584 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3585 3586 if (next_entry_offset > d_info->out_buf_len) { 3587 d_info->out_buf_len = 0; 3588 rc = -ENOSPC; 3589 goto free_conv_name; 3590 } 3591 3592 kstat = d_info->wptr; 3593 if (info_level != FILE_NAMES_INFORMATION) 3594 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3595 3596 switch (info_level) { 3597 case FILE_FULL_DIRECTORY_INFORMATION: 3598 { 3599 struct file_full_directory_info *ffdinfo; 3600 3601 ffdinfo = (struct file_full_directory_info *)kstat; 3602 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3603 ffdinfo->EaSize = 3604 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3605 if (ffdinfo->EaSize) 3606 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3607 if (d_info->hide_dot_file && d_info->name[0] == '.') 3608 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3609 memcpy(ffdinfo->FileName, conv_name, conv_len); 3610 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3611 break; 3612 } 3613 case FILE_BOTH_DIRECTORY_INFORMATION: 3614 { 3615 struct file_both_directory_info *fbdinfo; 3616 3617 fbdinfo = (struct file_both_directory_info *)kstat; 3618 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3619 fbdinfo->EaSize = 3620 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3621 if (fbdinfo->EaSize) 3622 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3623 fbdinfo->ShortNameLength = 0; 3624 fbdinfo->Reserved = 0; 3625 if (d_info->hide_dot_file && d_info->name[0] == '.') 3626 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3627 memcpy(fbdinfo->FileName, conv_name, conv_len); 3628 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3629 break; 3630 } 3631 case FILE_DIRECTORY_INFORMATION: 3632 { 3633 struct file_directory_info *fdinfo; 3634 3635 fdinfo = (struct file_directory_info *)kstat; 3636 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3637 if (d_info->hide_dot_file && d_info->name[0] == '.') 3638 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3639 memcpy(fdinfo->FileName, conv_name, conv_len); 3640 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3641 break; 3642 } 3643 case FILE_NAMES_INFORMATION: 3644 { 3645 struct file_names_info *fninfo; 3646 3647 fninfo = (struct file_names_info *)kstat; 3648 fninfo->FileNameLength = cpu_to_le32(conv_len); 3649 memcpy(fninfo->FileName, conv_name, conv_len); 3650 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3651 break; 3652 } 3653 case FILEID_FULL_DIRECTORY_INFORMATION: 3654 { 3655 struct file_id_full_dir_info *dinfo; 3656 3657 dinfo = (struct file_id_full_dir_info *)kstat; 3658 dinfo->FileNameLength = cpu_to_le32(conv_len); 3659 dinfo->EaSize = 3660 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3661 if (dinfo->EaSize) 3662 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3663 dinfo->Reserved = 0; 3664 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3665 if (d_info->hide_dot_file && d_info->name[0] == '.') 3666 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3667 memcpy(dinfo->FileName, conv_name, conv_len); 3668 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3669 break; 3670 } 3671 case FILEID_BOTH_DIRECTORY_INFORMATION: 3672 { 3673 struct file_id_both_directory_info *fibdinfo; 3674 3675 fibdinfo = (struct file_id_both_directory_info *)kstat; 3676 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 3677 fibdinfo->EaSize = 3678 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3679 if (fibdinfo->EaSize) 3680 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3681 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3682 fibdinfo->ShortNameLength = 0; 3683 fibdinfo->Reserved = 0; 3684 fibdinfo->Reserved2 = cpu_to_le16(0); 3685 if (d_info->hide_dot_file && d_info->name[0] == '.') 3686 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3687 memcpy(fibdinfo->FileName, conv_name, conv_len); 3688 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3689 break; 3690 } 3691 case SMB_FIND_FILE_POSIX_INFO: 3692 { 3693 struct smb2_posix_info *posix_info; 3694 u64 time; 3695 3696 posix_info = (struct smb2_posix_info *)kstat; 3697 posix_info->Ignored = 0; 3698 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 3699 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 3700 posix_info->ChangeTime = cpu_to_le64(time); 3701 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 3702 posix_info->LastAccessTime = cpu_to_le64(time); 3703 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 3704 posix_info->LastWriteTime = cpu_to_le64(time); 3705 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 3706 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 3707 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 3708 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 3709 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 3710 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 3711 posix_info->DosAttributes = 3712 S_ISDIR(ksmbd_kstat->kstat->mode) ? 3713 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 3714 if (d_info->hide_dot_file && d_info->name[0] == '.') 3715 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3716 /* 3717 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 3718 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 3719 * sub_auth(4 * 1(num_subauth)) + RID(4). 3720 */ 3721 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 3722 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 3723 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 3724 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 3725 memcpy(posix_info->name, conv_name, conv_len); 3726 posix_info->name_len = cpu_to_le32(conv_len); 3727 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 3728 break; 3729 } 3730 3731 } /* switch (info_level) */ 3732 3733 d_info->last_entry_offset = d_info->data_count; 3734 d_info->data_count += next_entry_offset; 3735 d_info->out_buf_len -= next_entry_offset; 3736 d_info->wptr += next_entry_offset; 3737 3738 ksmbd_debug(SMB, 3739 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 3740 info_level, d_info->out_buf_len, 3741 next_entry_offset, d_info->data_count); 3742 3743 free_conv_name: 3744 kfree(conv_name); 3745 return rc; 3746 } 3747 3748 struct smb2_query_dir_private { 3749 struct ksmbd_work *work; 3750 char *search_pattern; 3751 struct ksmbd_file *dir_fp; 3752 3753 struct ksmbd_dir_info *d_info; 3754 int info_level; 3755 }; 3756 3757 static void lock_dir(struct ksmbd_file *dir_fp) 3758 { 3759 struct dentry *dir = dir_fp->filp->f_path.dentry; 3760 3761 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); 3762 } 3763 3764 static void unlock_dir(struct ksmbd_file *dir_fp) 3765 { 3766 struct dentry *dir = dir_fp->filp->f_path.dentry; 3767 3768 inode_unlock(d_inode(dir)); 3769 } 3770 3771 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 3772 { 3773 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 3774 struct kstat kstat; 3775 struct ksmbd_kstat ksmbd_kstat; 3776 int rc; 3777 int i; 3778 3779 for (i = 0; i < priv->d_info->num_entry; i++) { 3780 struct dentry *dent; 3781 3782 if (dentry_name(priv->d_info, priv->info_level)) 3783 return -EINVAL; 3784 3785 lock_dir(priv->dir_fp); 3786 dent = lookup_one(idmap, priv->d_info->name, 3787 priv->dir_fp->filp->f_path.dentry, 3788 priv->d_info->name_len); 3789 unlock_dir(priv->dir_fp); 3790 3791 if (IS_ERR(dent)) { 3792 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 3793 priv->d_info->name, 3794 PTR_ERR(dent)); 3795 continue; 3796 } 3797 if (unlikely(d_is_negative(dent))) { 3798 dput(dent); 3799 ksmbd_debug(SMB, "Negative dentry `%s'\n", 3800 priv->d_info->name); 3801 continue; 3802 } 3803 3804 ksmbd_kstat.kstat = &kstat; 3805 if (priv->info_level != FILE_NAMES_INFORMATION) 3806 ksmbd_vfs_fill_dentry_attrs(priv->work, 3807 idmap, 3808 dent, 3809 &ksmbd_kstat); 3810 3811 rc = smb2_populate_readdir_entry(priv->work->conn, 3812 priv->info_level, 3813 priv->d_info, 3814 &ksmbd_kstat); 3815 dput(dent); 3816 if (rc) 3817 return rc; 3818 } 3819 return 0; 3820 } 3821 3822 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 3823 int info_level) 3824 { 3825 int struct_sz; 3826 int conv_len; 3827 int next_entry_offset; 3828 3829 struct_sz = readdir_info_level_struct_sz(info_level); 3830 if (struct_sz == -EOPNOTSUPP) 3831 return -EOPNOTSUPP; 3832 3833 conv_len = (d_info->name_len + 1) * 2; 3834 next_entry_offset = ALIGN(struct_sz + conv_len, 3835 KSMBD_DIR_INFO_ALIGNMENT); 3836 3837 if (next_entry_offset > d_info->out_buf_len) { 3838 d_info->out_buf_len = 0; 3839 return -ENOSPC; 3840 } 3841 3842 switch (info_level) { 3843 case FILE_FULL_DIRECTORY_INFORMATION: 3844 { 3845 struct file_full_directory_info *ffdinfo; 3846 3847 ffdinfo = (struct file_full_directory_info *)d_info->wptr; 3848 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 3849 ffdinfo->FileName[d_info->name_len] = 0x00; 3850 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3851 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3852 break; 3853 } 3854 case FILE_BOTH_DIRECTORY_INFORMATION: 3855 { 3856 struct file_both_directory_info *fbdinfo; 3857 3858 fbdinfo = (struct file_both_directory_info *)d_info->wptr; 3859 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 3860 fbdinfo->FileName[d_info->name_len] = 0x00; 3861 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3862 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3863 break; 3864 } 3865 case FILE_DIRECTORY_INFORMATION: 3866 { 3867 struct file_directory_info *fdinfo; 3868 3869 fdinfo = (struct file_directory_info *)d_info->wptr; 3870 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 3871 fdinfo->FileName[d_info->name_len] = 0x00; 3872 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3873 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3874 break; 3875 } 3876 case FILE_NAMES_INFORMATION: 3877 { 3878 struct file_names_info *fninfo; 3879 3880 fninfo = (struct file_names_info *)d_info->wptr; 3881 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 3882 fninfo->FileName[d_info->name_len] = 0x00; 3883 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 3884 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3885 break; 3886 } 3887 case FILEID_FULL_DIRECTORY_INFORMATION: 3888 { 3889 struct file_id_full_dir_info *dinfo; 3890 3891 dinfo = (struct file_id_full_dir_info *)d_info->wptr; 3892 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 3893 dinfo->FileName[d_info->name_len] = 0x00; 3894 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3895 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3896 break; 3897 } 3898 case FILEID_BOTH_DIRECTORY_INFORMATION: 3899 { 3900 struct file_id_both_directory_info *fibdinfo; 3901 3902 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 3903 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 3904 fibdinfo->FileName[d_info->name_len] = 0x00; 3905 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3906 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3907 break; 3908 } 3909 case SMB_FIND_FILE_POSIX_INFO: 3910 { 3911 struct smb2_posix_info *posix_info; 3912 3913 posix_info = (struct smb2_posix_info *)d_info->wptr; 3914 memcpy(posix_info->name, d_info->name, d_info->name_len); 3915 posix_info->name[d_info->name_len] = 0x00; 3916 posix_info->name_len = cpu_to_le32(d_info->name_len); 3917 posix_info->NextEntryOffset = 3918 cpu_to_le32(next_entry_offset); 3919 break; 3920 } 3921 } /* switch (info_level) */ 3922 3923 d_info->num_entry++; 3924 d_info->out_buf_len -= next_entry_offset; 3925 d_info->wptr += next_entry_offset; 3926 return 0; 3927 } 3928 3929 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 3930 loff_t offset, u64 ino, unsigned int d_type) 3931 { 3932 struct ksmbd_readdir_data *buf; 3933 struct smb2_query_dir_private *priv; 3934 struct ksmbd_dir_info *d_info; 3935 int rc; 3936 3937 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 3938 priv = buf->private; 3939 d_info = priv->d_info; 3940 3941 /* dot and dotdot entries are already reserved */ 3942 if (!strcmp(".", name) || !strcmp("..", name)) 3943 return true; 3944 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 3945 return true; 3946 if (!match_pattern(name, namlen, priv->search_pattern)) 3947 return true; 3948 3949 d_info->name = name; 3950 d_info->name_len = namlen; 3951 rc = reserve_populate_dentry(d_info, priv->info_level); 3952 if (rc) 3953 return false; 3954 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 3955 d_info->out_buf_len = 0; 3956 return true; 3957 } 3958 3959 static int verify_info_level(int info_level) 3960 { 3961 switch (info_level) { 3962 case FILE_FULL_DIRECTORY_INFORMATION: 3963 case FILE_BOTH_DIRECTORY_INFORMATION: 3964 case FILE_DIRECTORY_INFORMATION: 3965 case FILE_NAMES_INFORMATION: 3966 case FILEID_FULL_DIRECTORY_INFORMATION: 3967 case FILEID_BOTH_DIRECTORY_INFORMATION: 3968 case SMB_FIND_FILE_POSIX_INFO: 3969 break; 3970 default: 3971 return -EOPNOTSUPP; 3972 } 3973 3974 return 0; 3975 } 3976 3977 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 3978 { 3979 int free_len; 3980 3981 free_len = (int)(work->response_sz - 3982 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 3983 return free_len; 3984 } 3985 3986 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 3987 unsigned short hdr2_len, 3988 unsigned int out_buf_len) 3989 { 3990 int free_len; 3991 3992 if (out_buf_len > work->conn->vals->max_trans_size) 3993 return -EINVAL; 3994 3995 free_len = smb2_resp_buf_len(work, hdr2_len); 3996 if (free_len < 0) 3997 return -EINVAL; 3998 3999 return min_t(int, out_buf_len, free_len); 4000 } 4001 4002 int smb2_query_dir(struct ksmbd_work *work) 4003 { 4004 struct ksmbd_conn *conn = work->conn; 4005 struct smb2_query_directory_req *req; 4006 struct smb2_query_directory_rsp *rsp; 4007 struct ksmbd_share_config *share = work->tcon->share_conf; 4008 struct ksmbd_file *dir_fp = NULL; 4009 struct ksmbd_dir_info d_info; 4010 int rc = 0; 4011 char *srch_ptr = NULL; 4012 unsigned char srch_flag; 4013 int buffer_sz; 4014 struct smb2_query_dir_private query_dir_private = {NULL, }; 4015 4016 WORK_BUFFERS(work, req, rsp); 4017 4018 if (ksmbd_override_fsids(work)) { 4019 rsp->hdr.Status = STATUS_NO_MEMORY; 4020 smb2_set_err_rsp(work); 4021 return -ENOMEM; 4022 } 4023 4024 rc = verify_info_level(req->FileInformationClass); 4025 if (rc) { 4026 rc = -EFAULT; 4027 goto err_out2; 4028 } 4029 4030 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4031 if (!dir_fp) { 4032 rc = -EBADF; 4033 goto err_out2; 4034 } 4035 4036 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4037 inode_permission(file_mnt_idmap(dir_fp->filp), 4038 file_inode(dir_fp->filp), 4039 MAY_READ | MAY_EXEC)) { 4040 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4041 rc = -EACCES; 4042 goto err_out2; 4043 } 4044 4045 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4046 pr_err("can't do query dir for a file\n"); 4047 rc = -EINVAL; 4048 goto err_out2; 4049 } 4050 4051 srch_flag = req->Flags; 4052 srch_ptr = smb_strndup_from_utf16(req->Buffer, 4053 le16_to_cpu(req->FileNameLength), 1, 4054 conn->local_nls); 4055 if (IS_ERR(srch_ptr)) { 4056 ksmbd_debug(SMB, "Search Pattern not found\n"); 4057 rc = -EINVAL; 4058 goto err_out2; 4059 } else { 4060 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4061 } 4062 4063 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4064 ksmbd_debug(SMB, "Restart directory scan\n"); 4065 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4066 } 4067 4068 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4069 d_info.wptr = (char *)rsp->Buffer; 4070 d_info.rptr = (char *)rsp->Buffer; 4071 d_info.out_buf_len = 4072 smb2_calc_max_out_buf_len(work, 8, 4073 le32_to_cpu(req->OutputBufferLength)); 4074 if (d_info.out_buf_len < 0) { 4075 rc = -EINVAL; 4076 goto err_out; 4077 } 4078 d_info.flags = srch_flag; 4079 4080 /* 4081 * reserve dot and dotdot entries in head of buffer 4082 * in first response 4083 */ 4084 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4085 dir_fp, &d_info, srch_ptr, 4086 smb2_populate_readdir_entry); 4087 if (rc == -ENOSPC) 4088 rc = 0; 4089 else if (rc) 4090 goto err_out; 4091 4092 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4093 d_info.hide_dot_file = true; 4094 4095 buffer_sz = d_info.out_buf_len; 4096 d_info.rptr = d_info.wptr; 4097 query_dir_private.work = work; 4098 query_dir_private.search_pattern = srch_ptr; 4099 query_dir_private.dir_fp = dir_fp; 4100 query_dir_private.d_info = &d_info; 4101 query_dir_private.info_level = req->FileInformationClass; 4102 dir_fp->readdir_data.private = &query_dir_private; 4103 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4104 4105 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4106 /* 4107 * req->OutputBufferLength is too small to contain even one entry. 4108 * In this case, it immediately returns OutputBufferLength 0 to client. 4109 */ 4110 if (!d_info.out_buf_len && !d_info.num_entry) 4111 goto no_buf_len; 4112 if (rc > 0 || rc == -ENOSPC) 4113 rc = 0; 4114 else if (rc) 4115 goto err_out; 4116 4117 d_info.wptr = d_info.rptr; 4118 d_info.out_buf_len = buffer_sz; 4119 rc = process_query_dir_entries(&query_dir_private); 4120 if (rc) 4121 goto err_out; 4122 4123 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4124 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4125 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4126 } else { 4127 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4128 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4129 } 4130 rsp->StructureSize = cpu_to_le16(9); 4131 rsp->OutputBufferOffset = cpu_to_le16(0); 4132 rsp->OutputBufferLength = cpu_to_le32(0); 4133 rsp->Buffer[0] = 0; 4134 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4135 sizeof(struct smb2_query_directory_rsp)); 4136 if (rc) 4137 goto err_out; 4138 } else { 4139 no_buf_len: 4140 ((struct file_directory_info *) 4141 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4142 ->NextEntryOffset = 0; 4143 if (d_info.data_count >= d_info.last_entry_off_align) 4144 d_info.data_count -= d_info.last_entry_off_align; 4145 4146 rsp->StructureSize = cpu_to_le16(9); 4147 rsp->OutputBufferOffset = cpu_to_le16(72); 4148 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4149 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4150 offsetof(struct smb2_query_directory_rsp, Buffer) + 4151 d_info.data_count); 4152 if (rc) 4153 goto err_out; 4154 } 4155 4156 kfree(srch_ptr); 4157 ksmbd_fd_put(work, dir_fp); 4158 ksmbd_revert_fsids(work); 4159 return 0; 4160 4161 err_out: 4162 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4163 kfree(srch_ptr); 4164 4165 err_out2: 4166 if (rc == -EINVAL) 4167 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4168 else if (rc == -EACCES) 4169 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4170 else if (rc == -ENOENT) 4171 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4172 else if (rc == -EBADF) 4173 rsp->hdr.Status = STATUS_FILE_CLOSED; 4174 else if (rc == -ENOMEM) 4175 rsp->hdr.Status = STATUS_NO_MEMORY; 4176 else if (rc == -EFAULT) 4177 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4178 else if (rc == -EIO) 4179 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4180 if (!rsp->hdr.Status) 4181 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4182 4183 smb2_set_err_rsp(work); 4184 ksmbd_fd_put(work, dir_fp); 4185 ksmbd_revert_fsids(work); 4186 return 0; 4187 } 4188 4189 /** 4190 * buffer_check_err() - helper function to check buffer errors 4191 * @reqOutputBufferLength: max buffer length expected in command response 4192 * @rsp: query info response buffer contains output buffer length 4193 * @rsp_org: base response buffer pointer in case of chained response 4194 * 4195 * Return: 0 on success, otherwise error 4196 */ 4197 static int buffer_check_err(int reqOutputBufferLength, 4198 struct smb2_query_info_rsp *rsp, 4199 void *rsp_org) 4200 { 4201 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4202 pr_err("Invalid Buffer Size Requested\n"); 4203 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4204 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4205 return -EINVAL; 4206 } 4207 return 0; 4208 } 4209 4210 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4211 void *rsp_org) 4212 { 4213 struct smb2_file_standard_info *sinfo; 4214 4215 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4216 4217 sinfo->AllocationSize = cpu_to_le64(4096); 4218 sinfo->EndOfFile = cpu_to_le64(0); 4219 sinfo->NumberOfLinks = cpu_to_le32(1); 4220 sinfo->DeletePending = 1; 4221 sinfo->Directory = 0; 4222 rsp->OutputBufferLength = 4223 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4224 } 4225 4226 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4227 void *rsp_org) 4228 { 4229 struct smb2_file_internal_info *file_info; 4230 4231 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4232 4233 /* any unique number */ 4234 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4235 rsp->OutputBufferLength = 4236 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4237 } 4238 4239 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4240 struct smb2_query_info_req *req, 4241 struct smb2_query_info_rsp *rsp, 4242 void *rsp_org) 4243 { 4244 u64 id; 4245 int rc; 4246 4247 /* 4248 * Windows can sometime send query file info request on 4249 * pipe without opening it, checking error condition here 4250 */ 4251 id = req->VolatileFileId; 4252 if (!ksmbd_session_rpc_method(sess, id)) 4253 return -ENOENT; 4254 4255 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4256 req->FileInfoClass, req->VolatileFileId); 4257 4258 switch (req->FileInfoClass) { 4259 case FILE_STANDARD_INFORMATION: 4260 get_standard_info_pipe(rsp, rsp_org); 4261 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4262 rsp, rsp_org); 4263 break; 4264 case FILE_INTERNAL_INFORMATION: 4265 get_internal_info_pipe(rsp, id, rsp_org); 4266 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4267 rsp, rsp_org); 4268 break; 4269 default: 4270 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4271 req->FileInfoClass); 4272 rc = -EOPNOTSUPP; 4273 } 4274 return rc; 4275 } 4276 4277 /** 4278 * smb2_get_ea() - handler for smb2 get extended attribute command 4279 * @work: smb work containing query info command buffer 4280 * @fp: ksmbd_file pointer 4281 * @req: get extended attribute request 4282 * @rsp: response buffer pointer 4283 * @rsp_org: base response buffer pointer in case of chained response 4284 * 4285 * Return: 0 on success, otherwise error 4286 */ 4287 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4288 struct smb2_query_info_req *req, 4289 struct smb2_query_info_rsp *rsp, void *rsp_org) 4290 { 4291 struct smb2_ea_info *eainfo, *prev_eainfo; 4292 char *name, *ptr, *xattr_list = NULL, *buf; 4293 int rc, name_len, value_len, xattr_list_len, idx; 4294 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4295 struct smb2_ea_info_req *ea_req = NULL; 4296 const struct path *path; 4297 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4298 4299 if (!(fp->daccess & FILE_READ_EA_LE)) { 4300 pr_err("Not permitted to read ext attr : 0x%x\n", 4301 fp->daccess); 4302 return -EACCES; 4303 } 4304 4305 path = &fp->filp->f_path; 4306 /* single EA entry is requested with given user.* name */ 4307 if (req->InputBufferLength) { 4308 if (le32_to_cpu(req->InputBufferLength) < 4309 sizeof(struct smb2_ea_info_req)) 4310 return -EINVAL; 4311 4312 ea_req = (struct smb2_ea_info_req *)req->Buffer; 4313 } else { 4314 /* need to send all EAs, if no specific EA is requested*/ 4315 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4316 ksmbd_debug(SMB, 4317 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4318 le32_to_cpu(req->Flags)); 4319 } 4320 4321 buf_free_len = 4322 smb2_calc_max_out_buf_len(work, 8, 4323 le32_to_cpu(req->OutputBufferLength)); 4324 if (buf_free_len < 0) 4325 return -EINVAL; 4326 4327 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4328 if (rc < 0) { 4329 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4330 goto out; 4331 } else if (!rc) { /* there is no EA in the file */ 4332 ksmbd_debug(SMB, "no ea data in the file\n"); 4333 goto done; 4334 } 4335 xattr_list_len = rc; 4336 4337 ptr = (char *)rsp->Buffer; 4338 eainfo = (struct smb2_ea_info *)ptr; 4339 prev_eainfo = eainfo; 4340 idx = 0; 4341 4342 while (idx < xattr_list_len) { 4343 name = xattr_list + idx; 4344 name_len = strlen(name); 4345 4346 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4347 idx += name_len + 1; 4348 4349 /* 4350 * CIFS does not support EA other than user.* namespace, 4351 * still keep the framework generic, to list other attrs 4352 * in future. 4353 */ 4354 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4355 continue; 4356 4357 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4358 STREAM_PREFIX_LEN)) 4359 continue; 4360 4361 if (req->InputBufferLength && 4362 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4363 ea_req->EaNameLength)) 4364 continue; 4365 4366 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4367 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4368 continue; 4369 4370 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4371 name_len -= XATTR_USER_PREFIX_LEN; 4372 4373 ptr = eainfo->name + name_len + 1; 4374 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4375 name_len + 1); 4376 /* bailout if xattr can't fit in buf_free_len */ 4377 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4378 name, &buf); 4379 if (value_len <= 0) { 4380 rc = -ENOENT; 4381 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4382 goto out; 4383 } 4384 4385 buf_free_len -= value_len; 4386 if (buf_free_len < 0) { 4387 kfree(buf); 4388 break; 4389 } 4390 4391 memcpy(ptr, buf, value_len); 4392 kfree(buf); 4393 4394 ptr += value_len; 4395 eainfo->Flags = 0; 4396 eainfo->EaNameLength = name_len; 4397 4398 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4399 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4400 name_len); 4401 else 4402 memcpy(eainfo->name, name, name_len); 4403 4404 eainfo->name[name_len] = '\0'; 4405 eainfo->EaValueLength = cpu_to_le16(value_len); 4406 next_offset = offsetof(struct smb2_ea_info, name) + 4407 name_len + 1 + value_len; 4408 4409 /* align next xattr entry at 4 byte bundary */ 4410 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4411 if (alignment_bytes) { 4412 memset(ptr, '\0', alignment_bytes); 4413 ptr += alignment_bytes; 4414 next_offset += alignment_bytes; 4415 buf_free_len -= alignment_bytes; 4416 } 4417 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4418 prev_eainfo = eainfo; 4419 eainfo = (struct smb2_ea_info *)ptr; 4420 rsp_data_cnt += next_offset; 4421 4422 if (req->InputBufferLength) { 4423 ksmbd_debug(SMB, "single entry requested\n"); 4424 break; 4425 } 4426 } 4427 4428 /* no more ea entries */ 4429 prev_eainfo->NextEntryOffset = 0; 4430 done: 4431 rc = 0; 4432 if (rsp_data_cnt == 0) 4433 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4434 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4435 out: 4436 kvfree(xattr_list); 4437 return rc; 4438 } 4439 4440 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4441 struct ksmbd_file *fp, void *rsp_org) 4442 { 4443 struct smb2_file_access_info *file_info; 4444 4445 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4446 file_info->AccessFlags = fp->daccess; 4447 rsp->OutputBufferLength = 4448 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4449 } 4450 4451 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4452 struct ksmbd_file *fp, void *rsp_org) 4453 { 4454 struct smb2_file_basic_info *basic_info; 4455 struct kstat stat; 4456 u64 time; 4457 4458 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4459 pr_err("no right to read the attributes : 0x%x\n", 4460 fp->daccess); 4461 return -EACCES; 4462 } 4463 4464 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4465 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4466 file_inode(fp->filp), &stat); 4467 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4468 time = ksmbd_UnixTimeToNT(stat.atime); 4469 basic_info->LastAccessTime = cpu_to_le64(time); 4470 time = ksmbd_UnixTimeToNT(stat.mtime); 4471 basic_info->LastWriteTime = cpu_to_le64(time); 4472 time = ksmbd_UnixTimeToNT(stat.ctime); 4473 basic_info->ChangeTime = cpu_to_le64(time); 4474 basic_info->Attributes = fp->f_ci->m_fattr; 4475 basic_info->Pad1 = 0; 4476 rsp->OutputBufferLength = 4477 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4478 return 0; 4479 } 4480 4481 static void get_file_standard_info(struct smb2_query_info_rsp *rsp, 4482 struct ksmbd_file *fp, void *rsp_org) 4483 { 4484 struct smb2_file_standard_info *sinfo; 4485 unsigned int delete_pending; 4486 struct inode *inode; 4487 struct kstat stat; 4488 4489 inode = file_inode(fp->filp); 4490 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat); 4491 4492 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4493 delete_pending = ksmbd_inode_pending_delete(fp); 4494 4495 sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4496 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4497 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4498 sinfo->DeletePending = delete_pending; 4499 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4500 rsp->OutputBufferLength = 4501 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4502 } 4503 4504 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4505 void *rsp_org) 4506 { 4507 struct smb2_file_alignment_info *file_info; 4508 4509 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4510 file_info->AlignmentRequirement = 0; 4511 rsp->OutputBufferLength = 4512 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4513 } 4514 4515 static int get_file_all_info(struct ksmbd_work *work, 4516 struct smb2_query_info_rsp *rsp, 4517 struct ksmbd_file *fp, 4518 void *rsp_org) 4519 { 4520 struct ksmbd_conn *conn = work->conn; 4521 struct smb2_file_all_info *file_info; 4522 unsigned int delete_pending; 4523 struct inode *inode; 4524 struct kstat stat; 4525 int conv_len; 4526 char *filename; 4527 u64 time; 4528 4529 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4530 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4531 fp->daccess); 4532 return -EACCES; 4533 } 4534 4535 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4536 if (IS_ERR(filename)) 4537 return PTR_ERR(filename); 4538 4539 inode = file_inode(fp->filp); 4540 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat); 4541 4542 ksmbd_debug(SMB, "filename = %s\n", filename); 4543 delete_pending = ksmbd_inode_pending_delete(fp); 4544 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4545 4546 file_info->CreationTime = cpu_to_le64(fp->create_time); 4547 time = ksmbd_UnixTimeToNT(stat.atime); 4548 file_info->LastAccessTime = cpu_to_le64(time); 4549 time = ksmbd_UnixTimeToNT(stat.mtime); 4550 file_info->LastWriteTime = cpu_to_le64(time); 4551 time = ksmbd_UnixTimeToNT(stat.ctime); 4552 file_info->ChangeTime = cpu_to_le64(time); 4553 file_info->Attributes = fp->f_ci->m_fattr; 4554 file_info->Pad1 = 0; 4555 file_info->AllocationSize = 4556 cpu_to_le64(inode->i_blocks << 9); 4557 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4558 file_info->NumberOfLinks = 4559 cpu_to_le32(get_nlink(&stat) - delete_pending); 4560 file_info->DeletePending = delete_pending; 4561 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4562 file_info->Pad2 = 0; 4563 file_info->IndexNumber = cpu_to_le64(stat.ino); 4564 file_info->EASize = 0; 4565 file_info->AccessFlags = fp->daccess; 4566 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4567 file_info->Mode = fp->coption; 4568 file_info->AlignmentRequirement = 0; 4569 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4570 PATH_MAX, conn->local_nls, 0); 4571 conv_len *= 2; 4572 file_info->FileNameLength = cpu_to_le32(conv_len); 4573 rsp->OutputBufferLength = 4574 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4575 kfree(filename); 4576 return 0; 4577 } 4578 4579 static void get_file_alternate_info(struct ksmbd_work *work, 4580 struct smb2_query_info_rsp *rsp, 4581 struct ksmbd_file *fp, 4582 void *rsp_org) 4583 { 4584 struct ksmbd_conn *conn = work->conn; 4585 struct smb2_file_alt_name_info *file_info; 4586 struct dentry *dentry = fp->filp->f_path.dentry; 4587 int conv_len; 4588 4589 spin_lock(&dentry->d_lock); 4590 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 4591 conv_len = ksmbd_extract_shortname(conn, 4592 dentry->d_name.name, 4593 file_info->FileName); 4594 spin_unlock(&dentry->d_lock); 4595 file_info->FileNameLength = cpu_to_le32(conv_len); 4596 rsp->OutputBufferLength = 4597 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); 4598 } 4599 4600 static void get_file_stream_info(struct ksmbd_work *work, 4601 struct smb2_query_info_rsp *rsp, 4602 struct ksmbd_file *fp, 4603 void *rsp_org) 4604 { 4605 struct ksmbd_conn *conn = work->conn; 4606 struct smb2_file_stream_info *file_info; 4607 char *stream_name, *xattr_list = NULL, *stream_buf; 4608 struct kstat stat; 4609 const struct path *path = &fp->filp->f_path; 4610 ssize_t xattr_list_len; 4611 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 4612 int buf_free_len; 4613 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4614 4615 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4616 file_inode(fp->filp), &stat); 4617 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 4618 4619 buf_free_len = 4620 smb2_calc_max_out_buf_len(work, 8, 4621 le32_to_cpu(req->OutputBufferLength)); 4622 if (buf_free_len < 0) 4623 goto out; 4624 4625 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4626 if (xattr_list_len < 0) { 4627 goto out; 4628 } else if (!xattr_list_len) { 4629 ksmbd_debug(SMB, "empty xattr in the file\n"); 4630 goto out; 4631 } 4632 4633 while (idx < xattr_list_len) { 4634 stream_name = xattr_list + idx; 4635 streamlen = strlen(stream_name); 4636 idx += streamlen + 1; 4637 4638 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 4639 4640 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 4641 STREAM_PREFIX, STREAM_PREFIX_LEN)) 4642 continue; 4643 4644 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 4645 STREAM_PREFIX_LEN); 4646 streamlen = stream_name_len; 4647 4648 /* plus : size */ 4649 streamlen += 1; 4650 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); 4651 if (!stream_buf) 4652 break; 4653 4654 streamlen = snprintf(stream_buf, streamlen + 1, 4655 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 4656 4657 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 4658 if (next > buf_free_len) { 4659 kfree(stream_buf); 4660 break; 4661 } 4662 4663 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 4664 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4665 stream_buf, streamlen, 4666 conn->local_nls, 0); 4667 streamlen *= 2; 4668 kfree(stream_buf); 4669 file_info->StreamNameLength = cpu_to_le32(streamlen); 4670 file_info->StreamSize = cpu_to_le64(stream_name_len); 4671 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 4672 4673 nbytes += next; 4674 buf_free_len -= next; 4675 file_info->NextEntryOffset = cpu_to_le32(next); 4676 } 4677 4678 out: 4679 if (!S_ISDIR(stat.mode) && 4680 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 4681 file_info = (struct smb2_file_stream_info *) 4682 &rsp->Buffer[nbytes]; 4683 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4684 "::$DATA", 7, conn->local_nls, 0); 4685 streamlen *= 2; 4686 file_info->StreamNameLength = cpu_to_le32(streamlen); 4687 file_info->StreamSize = cpu_to_le64(stat.size); 4688 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 4689 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 4690 } 4691 4692 /* last entry offset should be 0 */ 4693 file_info->NextEntryOffset = 0; 4694 kvfree(xattr_list); 4695 4696 rsp->OutputBufferLength = cpu_to_le32(nbytes); 4697 } 4698 4699 static void get_file_internal_info(struct smb2_query_info_rsp *rsp, 4700 struct ksmbd_file *fp, void *rsp_org) 4701 { 4702 struct smb2_file_internal_info *file_info; 4703 struct kstat stat; 4704 4705 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4706 file_inode(fp->filp), &stat); 4707 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4708 file_info->IndexNumber = cpu_to_le64(stat.ino); 4709 rsp->OutputBufferLength = 4710 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4711 } 4712 4713 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 4714 struct ksmbd_file *fp, void *rsp_org) 4715 { 4716 struct smb2_file_ntwrk_info *file_info; 4717 struct inode *inode; 4718 struct kstat stat; 4719 u64 time; 4720 4721 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4722 pr_err("no right to read the attributes : 0x%x\n", 4723 fp->daccess); 4724 return -EACCES; 4725 } 4726 4727 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; 4728 4729 inode = file_inode(fp->filp); 4730 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat); 4731 4732 file_info->CreationTime = cpu_to_le64(fp->create_time); 4733 time = ksmbd_UnixTimeToNT(stat.atime); 4734 file_info->LastAccessTime = cpu_to_le64(time); 4735 time = ksmbd_UnixTimeToNT(stat.mtime); 4736 file_info->LastWriteTime = cpu_to_le64(time); 4737 time = ksmbd_UnixTimeToNT(stat.ctime); 4738 file_info->ChangeTime = cpu_to_le64(time); 4739 file_info->Attributes = fp->f_ci->m_fattr; 4740 file_info->AllocationSize = 4741 cpu_to_le64(inode->i_blocks << 9); 4742 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4743 file_info->Reserved = cpu_to_le32(0); 4744 rsp->OutputBufferLength = 4745 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); 4746 return 0; 4747 } 4748 4749 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 4750 { 4751 struct smb2_file_ea_info *file_info; 4752 4753 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 4754 file_info->EASize = 0; 4755 rsp->OutputBufferLength = 4756 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 4757 } 4758 4759 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 4760 struct ksmbd_file *fp, void *rsp_org) 4761 { 4762 struct smb2_file_pos_info *file_info; 4763 4764 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 4765 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4766 rsp->OutputBufferLength = 4767 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 4768 } 4769 4770 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 4771 struct ksmbd_file *fp, void *rsp_org) 4772 { 4773 struct smb2_file_mode_info *file_info; 4774 4775 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 4776 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 4777 rsp->OutputBufferLength = 4778 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 4779 } 4780 4781 static void get_file_compression_info(struct smb2_query_info_rsp *rsp, 4782 struct ksmbd_file *fp, void *rsp_org) 4783 { 4784 struct smb2_file_comp_info *file_info; 4785 struct kstat stat; 4786 4787 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4788 file_inode(fp->filp), &stat); 4789 4790 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 4791 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 4792 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 4793 file_info->CompressionUnitShift = 0; 4794 file_info->ChunkShift = 0; 4795 file_info->ClusterShift = 0; 4796 memset(&file_info->Reserved[0], 0, 3); 4797 4798 rsp->OutputBufferLength = 4799 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 4800 } 4801 4802 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 4803 struct ksmbd_file *fp, void *rsp_org) 4804 { 4805 struct smb2_file_attr_tag_info *file_info; 4806 4807 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4808 pr_err("no right to read the attributes : 0x%x\n", 4809 fp->daccess); 4810 return -EACCES; 4811 } 4812 4813 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 4814 file_info->FileAttributes = fp->f_ci->m_fattr; 4815 file_info->ReparseTag = 0; 4816 rsp->OutputBufferLength = 4817 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 4818 return 0; 4819 } 4820 4821 static void find_file_posix_info(struct smb2_query_info_rsp *rsp, 4822 struct ksmbd_file *fp, void *rsp_org) 4823 { 4824 struct smb311_posix_qinfo *file_info; 4825 struct inode *inode = file_inode(fp->filp); 4826 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4827 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 4828 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 4829 u64 time; 4830 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 4831 4832 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 4833 file_info->CreationTime = cpu_to_le64(fp->create_time); 4834 time = ksmbd_UnixTimeToNT(inode->i_atime); 4835 file_info->LastAccessTime = cpu_to_le64(time); 4836 time = ksmbd_UnixTimeToNT(inode->i_mtime); 4837 file_info->LastWriteTime = cpu_to_le64(time); 4838 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode)); 4839 file_info->ChangeTime = cpu_to_le64(time); 4840 file_info->DosAttributes = fp->f_ci->m_fattr; 4841 file_info->Inode = cpu_to_le64(inode->i_ino); 4842 file_info->EndOfFile = cpu_to_le64(inode->i_size); 4843 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4844 file_info->HardLinks = cpu_to_le32(inode->i_nlink); 4845 file_info->Mode = cpu_to_le32(inode->i_mode & 0777); 4846 file_info->DeviceId = cpu_to_le32(inode->i_rdev); 4847 4848 /* 4849 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4850 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4851 * sub_auth(4 * 1(num_subauth)) + RID(4). 4852 */ 4853 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 4854 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 4855 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 4856 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 4857 4858 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 4859 } 4860 4861 static int smb2_get_info_file(struct ksmbd_work *work, 4862 struct smb2_query_info_req *req, 4863 struct smb2_query_info_rsp *rsp) 4864 { 4865 struct ksmbd_file *fp; 4866 int fileinfoclass = 0; 4867 int rc = 0; 4868 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 4869 4870 if (test_share_config_flag(work->tcon->share_conf, 4871 KSMBD_SHARE_FLAG_PIPE)) { 4872 /* smb2 info file called for pipe */ 4873 return smb2_get_info_file_pipe(work->sess, req, rsp, 4874 work->response_buf); 4875 } 4876 4877 if (work->next_smb2_rcv_hdr_off) { 4878 if (!has_file_id(req->VolatileFileId)) { 4879 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 4880 work->compound_fid); 4881 id = work->compound_fid; 4882 pid = work->compound_pfid; 4883 } 4884 } 4885 4886 if (!has_file_id(id)) { 4887 id = req->VolatileFileId; 4888 pid = req->PersistentFileId; 4889 } 4890 4891 fp = ksmbd_lookup_fd_slow(work, id, pid); 4892 if (!fp) 4893 return -ENOENT; 4894 4895 fileinfoclass = req->FileInfoClass; 4896 4897 switch (fileinfoclass) { 4898 case FILE_ACCESS_INFORMATION: 4899 get_file_access_info(rsp, fp, work->response_buf); 4900 break; 4901 4902 case FILE_BASIC_INFORMATION: 4903 rc = get_file_basic_info(rsp, fp, work->response_buf); 4904 break; 4905 4906 case FILE_STANDARD_INFORMATION: 4907 get_file_standard_info(rsp, fp, work->response_buf); 4908 break; 4909 4910 case FILE_ALIGNMENT_INFORMATION: 4911 get_file_alignment_info(rsp, work->response_buf); 4912 break; 4913 4914 case FILE_ALL_INFORMATION: 4915 rc = get_file_all_info(work, rsp, fp, work->response_buf); 4916 break; 4917 4918 case FILE_ALTERNATE_NAME_INFORMATION: 4919 get_file_alternate_info(work, rsp, fp, work->response_buf); 4920 break; 4921 4922 case FILE_STREAM_INFORMATION: 4923 get_file_stream_info(work, rsp, fp, work->response_buf); 4924 break; 4925 4926 case FILE_INTERNAL_INFORMATION: 4927 get_file_internal_info(rsp, fp, work->response_buf); 4928 break; 4929 4930 case FILE_NETWORK_OPEN_INFORMATION: 4931 rc = get_file_network_open_info(rsp, fp, work->response_buf); 4932 break; 4933 4934 case FILE_EA_INFORMATION: 4935 get_file_ea_info(rsp, work->response_buf); 4936 break; 4937 4938 case FILE_FULL_EA_INFORMATION: 4939 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 4940 break; 4941 4942 case FILE_POSITION_INFORMATION: 4943 get_file_position_info(rsp, fp, work->response_buf); 4944 break; 4945 4946 case FILE_MODE_INFORMATION: 4947 get_file_mode_info(rsp, fp, work->response_buf); 4948 break; 4949 4950 case FILE_COMPRESSION_INFORMATION: 4951 get_file_compression_info(rsp, fp, work->response_buf); 4952 break; 4953 4954 case FILE_ATTRIBUTE_TAG_INFORMATION: 4955 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 4956 break; 4957 case SMB_FIND_FILE_POSIX_INFO: 4958 if (!work->tcon->posix_extensions) { 4959 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 4960 rc = -EOPNOTSUPP; 4961 } else { 4962 find_file_posix_info(rsp, fp, work->response_buf); 4963 } 4964 break; 4965 default: 4966 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 4967 fileinfoclass); 4968 rc = -EOPNOTSUPP; 4969 } 4970 if (!rc) 4971 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4972 rsp, work->response_buf); 4973 ksmbd_fd_put(work, fp); 4974 return rc; 4975 } 4976 4977 static int smb2_get_info_filesystem(struct ksmbd_work *work, 4978 struct smb2_query_info_req *req, 4979 struct smb2_query_info_rsp *rsp) 4980 { 4981 struct ksmbd_session *sess = work->sess; 4982 struct ksmbd_conn *conn = work->conn; 4983 struct ksmbd_share_config *share = work->tcon->share_conf; 4984 int fsinfoclass = 0; 4985 struct kstatfs stfs; 4986 struct path path; 4987 int rc = 0, len; 4988 4989 if (!share->path) 4990 return -EIO; 4991 4992 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 4993 if (rc) { 4994 pr_err("cannot create vfs path\n"); 4995 return -EIO; 4996 } 4997 4998 rc = vfs_statfs(&path, &stfs); 4999 if (rc) { 5000 pr_err("cannot do stat of path %s\n", share->path); 5001 path_put(&path); 5002 return -EIO; 5003 } 5004 5005 fsinfoclass = req->FileInfoClass; 5006 5007 switch (fsinfoclass) { 5008 case FS_DEVICE_INFORMATION: 5009 { 5010 struct filesystem_device_info *info; 5011 5012 info = (struct filesystem_device_info *)rsp->Buffer; 5013 5014 info->DeviceType = cpu_to_le32(stfs.f_type); 5015 info->DeviceCharacteristics = cpu_to_le32(0x00000020); 5016 rsp->OutputBufferLength = cpu_to_le32(8); 5017 break; 5018 } 5019 case FS_ATTRIBUTE_INFORMATION: 5020 { 5021 struct filesystem_attribute_info *info; 5022 size_t sz; 5023 5024 info = (struct filesystem_attribute_info *)rsp->Buffer; 5025 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5026 FILE_PERSISTENT_ACLS | 5027 FILE_UNICODE_ON_DISK | 5028 FILE_CASE_PRESERVED_NAMES | 5029 FILE_CASE_SENSITIVE_SEARCH | 5030 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5031 5032 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5033 5034 if (test_share_config_flag(work->tcon->share_conf, 5035 KSMBD_SHARE_FLAG_STREAMS)) 5036 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5037 5038 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5039 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5040 "NTFS", PATH_MAX, conn->local_nls, 0); 5041 len = len * 2; 5042 info->FileSystemNameLen = cpu_to_le32(len); 5043 sz = sizeof(struct filesystem_attribute_info) - 2 + len; 5044 rsp->OutputBufferLength = cpu_to_le32(sz); 5045 break; 5046 } 5047 case FS_VOLUME_INFORMATION: 5048 { 5049 struct filesystem_vol_info *info; 5050 size_t sz; 5051 unsigned int serial_crc = 0; 5052 5053 info = (struct filesystem_vol_info *)(rsp->Buffer); 5054 info->VolumeCreationTime = 0; 5055 serial_crc = crc32_le(serial_crc, share->name, 5056 strlen(share->name)); 5057 serial_crc = crc32_le(serial_crc, share->path, 5058 strlen(share->path)); 5059 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5060 strlen(ksmbd_netbios_name())); 5061 /* Taking dummy value of serial number*/ 5062 info->SerialNumber = cpu_to_le32(serial_crc); 5063 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5064 share->name, PATH_MAX, 5065 conn->local_nls, 0); 5066 len = len * 2; 5067 info->VolumeLabelSize = cpu_to_le32(len); 5068 info->Reserved = 0; 5069 sz = sizeof(struct filesystem_vol_info) - 2 + len; 5070 rsp->OutputBufferLength = cpu_to_le32(sz); 5071 break; 5072 } 5073 case FS_SIZE_INFORMATION: 5074 { 5075 struct filesystem_info *info; 5076 5077 info = (struct filesystem_info *)(rsp->Buffer); 5078 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5079 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); 5080 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5081 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5082 rsp->OutputBufferLength = cpu_to_le32(24); 5083 break; 5084 } 5085 case FS_FULL_SIZE_INFORMATION: 5086 { 5087 struct smb2_fs_full_size_info *info; 5088 5089 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5090 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5091 info->CallerAvailableAllocationUnits = 5092 cpu_to_le64(stfs.f_bavail); 5093 info->ActualAvailableAllocationUnits = 5094 cpu_to_le64(stfs.f_bfree); 5095 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5096 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5097 rsp->OutputBufferLength = cpu_to_le32(32); 5098 break; 5099 } 5100 case FS_OBJECT_ID_INFORMATION: 5101 { 5102 struct object_id_info *info; 5103 5104 info = (struct object_id_info *)(rsp->Buffer); 5105 5106 if (!user_guest(sess->user)) 5107 memcpy(info->objid, user_passkey(sess->user), 16); 5108 else 5109 memset(info->objid, 0, 16); 5110 5111 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5112 info->extended_info.version = cpu_to_le32(1); 5113 info->extended_info.release = cpu_to_le32(1); 5114 info->extended_info.rel_date = 0; 5115 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5116 rsp->OutputBufferLength = cpu_to_le32(64); 5117 break; 5118 } 5119 case FS_SECTOR_SIZE_INFORMATION: 5120 { 5121 struct smb3_fs_ss_info *info; 5122 unsigned int sector_size = 5123 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5124 5125 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5126 5127 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5128 info->PhysicalBytesPerSectorForAtomicity = 5129 cpu_to_le32(sector_size); 5130 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5131 info->FSEffPhysicalBytesPerSectorForAtomicity = 5132 cpu_to_le32(sector_size); 5133 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5134 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5135 info->ByteOffsetForSectorAlignment = 0; 5136 info->ByteOffsetForPartitionAlignment = 0; 5137 rsp->OutputBufferLength = cpu_to_le32(28); 5138 break; 5139 } 5140 case FS_CONTROL_INFORMATION: 5141 { 5142 /* 5143 * TODO : The current implementation is based on 5144 * test result with win7(NTFS) server. It's need to 5145 * modify this to get valid Quota values 5146 * from Linux kernel 5147 */ 5148 struct smb2_fs_control_info *info; 5149 5150 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5151 info->FreeSpaceStartFiltering = 0; 5152 info->FreeSpaceThreshold = 0; 5153 info->FreeSpaceStopFiltering = 0; 5154 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5155 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5156 info->Padding = 0; 5157 rsp->OutputBufferLength = cpu_to_le32(48); 5158 break; 5159 } 5160 case FS_POSIX_INFORMATION: 5161 { 5162 struct filesystem_posix_info *info; 5163 5164 if (!work->tcon->posix_extensions) { 5165 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5166 rc = -EOPNOTSUPP; 5167 } else { 5168 info = (struct filesystem_posix_info *)(rsp->Buffer); 5169 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5170 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5171 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5172 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5173 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5174 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5175 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5176 rsp->OutputBufferLength = cpu_to_le32(56); 5177 } 5178 break; 5179 } 5180 default: 5181 path_put(&path); 5182 return -EOPNOTSUPP; 5183 } 5184 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5185 rsp, work->response_buf); 5186 path_put(&path); 5187 return rc; 5188 } 5189 5190 static int smb2_get_info_sec(struct ksmbd_work *work, 5191 struct smb2_query_info_req *req, 5192 struct smb2_query_info_rsp *rsp) 5193 { 5194 struct ksmbd_file *fp; 5195 struct mnt_idmap *idmap; 5196 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5197 struct smb_fattr fattr = {{0}}; 5198 struct inode *inode; 5199 __u32 secdesclen = 0; 5200 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5201 int addition_info = le32_to_cpu(req->AdditionalInformation); 5202 int rc = 0, ppntsd_size = 0; 5203 5204 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5205 PROTECTED_DACL_SECINFO | 5206 UNPROTECTED_DACL_SECINFO)) { 5207 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5208 addition_info); 5209 5210 pntsd->revision = cpu_to_le16(1); 5211 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5212 pntsd->osidoffset = 0; 5213 pntsd->gsidoffset = 0; 5214 pntsd->sacloffset = 0; 5215 pntsd->dacloffset = 0; 5216 5217 secdesclen = sizeof(struct smb_ntsd); 5218 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5219 5220 return 0; 5221 } 5222 5223 if (work->next_smb2_rcv_hdr_off) { 5224 if (!has_file_id(req->VolatileFileId)) { 5225 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5226 work->compound_fid); 5227 id = work->compound_fid; 5228 pid = work->compound_pfid; 5229 } 5230 } 5231 5232 if (!has_file_id(id)) { 5233 id = req->VolatileFileId; 5234 pid = req->PersistentFileId; 5235 } 5236 5237 fp = ksmbd_lookup_fd_slow(work, id, pid); 5238 if (!fp) 5239 return -ENOENT; 5240 5241 idmap = file_mnt_idmap(fp->filp); 5242 inode = file_inode(fp->filp); 5243 ksmbd_acls_fattr(&fattr, idmap, inode); 5244 5245 if (test_share_config_flag(work->tcon->share_conf, 5246 KSMBD_SHARE_FLAG_ACL_XATTR)) 5247 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5248 fp->filp->f_path.dentry, 5249 &ppntsd); 5250 5251 /* Check if sd buffer size exceeds response buffer size */ 5252 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5253 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5254 addition_info, &secdesclen, &fattr); 5255 posix_acl_release(fattr.cf_acls); 5256 posix_acl_release(fattr.cf_dacls); 5257 kfree(ppntsd); 5258 ksmbd_fd_put(work, fp); 5259 if (rc) 5260 return rc; 5261 5262 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5263 return 0; 5264 } 5265 5266 /** 5267 * smb2_query_info() - handler for smb2 query info command 5268 * @work: smb work containing query info request buffer 5269 * 5270 * Return: 0 on success, otherwise error 5271 */ 5272 int smb2_query_info(struct ksmbd_work *work) 5273 { 5274 struct smb2_query_info_req *req; 5275 struct smb2_query_info_rsp *rsp; 5276 int rc = 0; 5277 5278 WORK_BUFFERS(work, req, rsp); 5279 5280 ksmbd_debug(SMB, "GOT query info request\n"); 5281 5282 switch (req->InfoType) { 5283 case SMB2_O_INFO_FILE: 5284 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5285 rc = smb2_get_info_file(work, req, rsp); 5286 break; 5287 case SMB2_O_INFO_FILESYSTEM: 5288 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5289 rc = smb2_get_info_filesystem(work, req, rsp); 5290 break; 5291 case SMB2_O_INFO_SECURITY: 5292 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5293 rc = smb2_get_info_sec(work, req, rsp); 5294 break; 5295 default: 5296 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5297 req->InfoType); 5298 rc = -EOPNOTSUPP; 5299 } 5300 5301 if (!rc) { 5302 rsp->StructureSize = cpu_to_le16(9); 5303 rsp->OutputBufferOffset = cpu_to_le16(72); 5304 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5305 offsetof(struct smb2_query_info_rsp, Buffer) + 5306 le32_to_cpu(rsp->OutputBufferLength)); 5307 } 5308 5309 if (rc < 0) { 5310 if (rc == -EACCES) 5311 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5312 else if (rc == -ENOENT) 5313 rsp->hdr.Status = STATUS_FILE_CLOSED; 5314 else if (rc == -EIO) 5315 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5316 else if (rc == -ENOMEM) 5317 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5318 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5319 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5320 smb2_set_err_rsp(work); 5321 5322 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5323 rc); 5324 return rc; 5325 } 5326 return 0; 5327 } 5328 5329 /** 5330 * smb2_close_pipe() - handler for closing IPC pipe 5331 * @work: smb work containing close request buffer 5332 * 5333 * Return: 0 5334 */ 5335 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5336 { 5337 u64 id; 5338 struct smb2_close_req *req; 5339 struct smb2_close_rsp *rsp; 5340 5341 WORK_BUFFERS(work, req, rsp); 5342 5343 id = req->VolatileFileId; 5344 ksmbd_session_rpc_close(work->sess, id); 5345 5346 rsp->StructureSize = cpu_to_le16(60); 5347 rsp->Flags = 0; 5348 rsp->Reserved = 0; 5349 rsp->CreationTime = 0; 5350 rsp->LastAccessTime = 0; 5351 rsp->LastWriteTime = 0; 5352 rsp->ChangeTime = 0; 5353 rsp->AllocationSize = 0; 5354 rsp->EndOfFile = 0; 5355 rsp->Attributes = 0; 5356 5357 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5358 sizeof(struct smb2_close_rsp)); 5359 } 5360 5361 /** 5362 * smb2_close() - handler for smb2 close file command 5363 * @work: smb work containing close request buffer 5364 * 5365 * Return: 0 5366 */ 5367 int smb2_close(struct ksmbd_work *work) 5368 { 5369 u64 volatile_id = KSMBD_NO_FID; 5370 u64 sess_id; 5371 struct smb2_close_req *req; 5372 struct smb2_close_rsp *rsp; 5373 struct ksmbd_conn *conn = work->conn; 5374 struct ksmbd_file *fp; 5375 struct inode *inode; 5376 u64 time; 5377 int err = 0; 5378 5379 WORK_BUFFERS(work, req, rsp); 5380 5381 if (test_share_config_flag(work->tcon->share_conf, 5382 KSMBD_SHARE_FLAG_PIPE)) { 5383 ksmbd_debug(SMB, "IPC pipe close request\n"); 5384 return smb2_close_pipe(work); 5385 } 5386 5387 sess_id = le64_to_cpu(req->hdr.SessionId); 5388 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5389 sess_id = work->compound_sid; 5390 5391 work->compound_sid = 0; 5392 if (check_session_id(conn, sess_id)) { 5393 work->compound_sid = sess_id; 5394 } else { 5395 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5396 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5397 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5398 err = -EBADF; 5399 goto out; 5400 } 5401 5402 if (work->next_smb2_rcv_hdr_off && 5403 !has_file_id(req->VolatileFileId)) { 5404 if (!has_file_id(work->compound_fid)) { 5405 /* file already closed, return FILE_CLOSED */ 5406 ksmbd_debug(SMB, "file already closed\n"); 5407 rsp->hdr.Status = STATUS_FILE_CLOSED; 5408 err = -EBADF; 5409 goto out; 5410 } else { 5411 ksmbd_debug(SMB, 5412 "Compound request set FID = %llu:%llu\n", 5413 work->compound_fid, 5414 work->compound_pfid); 5415 volatile_id = work->compound_fid; 5416 5417 /* file closed, stored id is not valid anymore */ 5418 work->compound_fid = KSMBD_NO_FID; 5419 work->compound_pfid = KSMBD_NO_FID; 5420 } 5421 } else { 5422 volatile_id = req->VolatileFileId; 5423 } 5424 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5425 5426 rsp->StructureSize = cpu_to_le16(60); 5427 rsp->Reserved = 0; 5428 5429 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5430 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5431 if (!fp) { 5432 err = -ENOENT; 5433 goto out; 5434 } 5435 5436 inode = file_inode(fp->filp); 5437 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5438 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 : 5439 cpu_to_le64(inode->i_blocks << 9); 5440 rsp->EndOfFile = cpu_to_le64(inode->i_size); 5441 rsp->Attributes = fp->f_ci->m_fattr; 5442 rsp->CreationTime = cpu_to_le64(fp->create_time); 5443 time = ksmbd_UnixTimeToNT(inode->i_atime); 5444 rsp->LastAccessTime = cpu_to_le64(time); 5445 time = ksmbd_UnixTimeToNT(inode->i_mtime); 5446 rsp->LastWriteTime = cpu_to_le64(time); 5447 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode)); 5448 rsp->ChangeTime = cpu_to_le64(time); 5449 ksmbd_fd_put(work, fp); 5450 } else { 5451 rsp->Flags = 0; 5452 rsp->AllocationSize = 0; 5453 rsp->EndOfFile = 0; 5454 rsp->Attributes = 0; 5455 rsp->CreationTime = 0; 5456 rsp->LastAccessTime = 0; 5457 rsp->LastWriteTime = 0; 5458 rsp->ChangeTime = 0; 5459 } 5460 5461 err = ksmbd_close_fd(work, volatile_id); 5462 out: 5463 if (!err) 5464 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 5465 sizeof(struct smb2_close_rsp)); 5466 5467 if (err) { 5468 if (rsp->hdr.Status == 0) 5469 rsp->hdr.Status = STATUS_FILE_CLOSED; 5470 smb2_set_err_rsp(work); 5471 } 5472 5473 return err; 5474 } 5475 5476 /** 5477 * smb2_echo() - handler for smb2 echo(ping) command 5478 * @work: smb work containing echo request buffer 5479 * 5480 * Return: 0 5481 */ 5482 int smb2_echo(struct ksmbd_work *work) 5483 { 5484 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); 5485 5486 if (work->next_smb2_rcv_hdr_off) 5487 rsp = ksmbd_resp_buf_next(work); 5488 5489 rsp->StructureSize = cpu_to_le16(4); 5490 rsp->Reserved = 0; 5491 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 5492 } 5493 5494 static int smb2_rename(struct ksmbd_work *work, 5495 struct ksmbd_file *fp, 5496 struct smb2_file_rename_info *file_info, 5497 struct nls_table *local_nls) 5498 { 5499 struct ksmbd_share_config *share = fp->tcon->share_conf; 5500 char *new_name = NULL; 5501 int rc, flags = 0; 5502 5503 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 5504 new_name = smb2_get_name(file_info->FileName, 5505 le32_to_cpu(file_info->FileNameLength), 5506 local_nls); 5507 if (IS_ERR(new_name)) 5508 return PTR_ERR(new_name); 5509 5510 if (strchr(new_name, ':')) { 5511 int s_type; 5512 char *xattr_stream_name, *stream_name = NULL; 5513 size_t xattr_stream_size; 5514 int len; 5515 5516 rc = parse_stream_name(new_name, &stream_name, &s_type); 5517 if (rc < 0) 5518 goto out; 5519 5520 len = strlen(new_name); 5521 if (len > 0 && new_name[len - 1] != '/') { 5522 pr_err("not allow base filename in rename\n"); 5523 rc = -ESHARE; 5524 goto out; 5525 } 5526 5527 rc = ksmbd_vfs_xattr_stream_name(stream_name, 5528 &xattr_stream_name, 5529 &xattr_stream_size, 5530 s_type); 5531 if (rc) 5532 goto out; 5533 5534 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 5535 &fp->filp->f_path, 5536 xattr_stream_name, 5537 NULL, 0, 0, true); 5538 if (rc < 0) { 5539 pr_err("failed to store stream name in xattr: %d\n", 5540 rc); 5541 rc = -EINVAL; 5542 goto out; 5543 } 5544 5545 goto out; 5546 } 5547 5548 ksmbd_debug(SMB, "new name %s\n", new_name); 5549 if (ksmbd_share_veto_filename(share, new_name)) { 5550 rc = -ENOENT; 5551 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 5552 goto out; 5553 } 5554 5555 if (!file_info->ReplaceIfExists) 5556 flags = RENAME_NOREPLACE; 5557 5558 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 5559 out: 5560 kfree(new_name); 5561 return rc; 5562 } 5563 5564 static int smb2_create_link(struct ksmbd_work *work, 5565 struct ksmbd_share_config *share, 5566 struct smb2_file_link_info *file_info, 5567 unsigned int buf_len, struct file *filp, 5568 struct nls_table *local_nls) 5569 { 5570 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 5571 struct path path, parent_path; 5572 bool file_present = false; 5573 int rc; 5574 5575 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 5576 le32_to_cpu(file_info->FileNameLength)) 5577 return -EINVAL; 5578 5579 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 5580 pathname = kmalloc(PATH_MAX, GFP_KERNEL); 5581 if (!pathname) 5582 return -ENOMEM; 5583 5584 link_name = smb2_get_name(file_info->FileName, 5585 le32_to_cpu(file_info->FileNameLength), 5586 local_nls); 5587 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 5588 rc = -EINVAL; 5589 goto out; 5590 } 5591 5592 ksmbd_debug(SMB, "link name is %s\n", link_name); 5593 target_name = file_path(filp, pathname, PATH_MAX); 5594 if (IS_ERR(target_name)) { 5595 rc = -EINVAL; 5596 goto out; 5597 } 5598 5599 ksmbd_debug(SMB, "target name is %s\n", target_name); 5600 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, 5601 &parent_path, &path, 0); 5602 if (rc) { 5603 if (rc != -ENOENT) 5604 goto out; 5605 } else 5606 file_present = true; 5607 5608 if (file_info->ReplaceIfExists) { 5609 if (file_present) { 5610 rc = ksmbd_vfs_remove_file(work, &path); 5611 if (rc) { 5612 rc = -EINVAL; 5613 ksmbd_debug(SMB, "cannot delete %s\n", 5614 link_name); 5615 goto out; 5616 } 5617 } 5618 } else { 5619 if (file_present) { 5620 rc = -EEXIST; 5621 ksmbd_debug(SMB, "link already exists\n"); 5622 goto out; 5623 } 5624 } 5625 5626 rc = ksmbd_vfs_link(work, target_name, link_name); 5627 if (rc) 5628 rc = -EINVAL; 5629 out: 5630 if (file_present) 5631 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 5632 5633 if (!IS_ERR(link_name)) 5634 kfree(link_name); 5635 kfree(pathname); 5636 return rc; 5637 } 5638 5639 static int set_file_basic_info(struct ksmbd_file *fp, 5640 struct smb2_file_basic_info *file_info, 5641 struct ksmbd_share_config *share) 5642 { 5643 struct iattr attrs; 5644 struct file *filp; 5645 struct inode *inode; 5646 struct mnt_idmap *idmap; 5647 int rc = 0; 5648 5649 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 5650 return -EACCES; 5651 5652 attrs.ia_valid = 0; 5653 filp = fp->filp; 5654 inode = file_inode(filp); 5655 idmap = file_mnt_idmap(filp); 5656 5657 if (file_info->CreationTime) 5658 fp->create_time = le64_to_cpu(file_info->CreationTime); 5659 5660 if (file_info->LastAccessTime) { 5661 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 5662 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 5663 } 5664 5665 attrs.ia_valid |= ATTR_CTIME; 5666 if (file_info->ChangeTime) 5667 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); 5668 else 5669 attrs.ia_ctime = inode_get_ctime(inode); 5670 5671 if (file_info->LastWriteTime) { 5672 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 5673 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 5674 } 5675 5676 if (file_info->Attributes) { 5677 if (!S_ISDIR(inode->i_mode) && 5678 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 5679 pr_err("can't change a file to a directory\n"); 5680 return -EINVAL; 5681 } 5682 5683 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 5684 fp->f_ci->m_fattr = file_info->Attributes | 5685 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 5686 } 5687 5688 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 5689 (file_info->CreationTime || file_info->Attributes)) { 5690 struct xattr_dos_attrib da = {0}; 5691 5692 da.version = 4; 5693 da.itime = fp->itime; 5694 da.create_time = fp->create_time; 5695 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 5696 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 5697 XATTR_DOSINFO_ITIME; 5698 5699 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 5700 true); 5701 if (rc) 5702 ksmbd_debug(SMB, 5703 "failed to restore file attribute in EA\n"); 5704 rc = 0; 5705 } 5706 5707 if (attrs.ia_valid) { 5708 struct dentry *dentry = filp->f_path.dentry; 5709 struct inode *inode = d_inode(dentry); 5710 5711 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 5712 return -EACCES; 5713 5714 inode_lock(inode); 5715 inode_set_ctime_to_ts(inode, attrs.ia_ctime); 5716 attrs.ia_valid &= ~ATTR_CTIME; 5717 rc = notify_change(idmap, dentry, &attrs, NULL); 5718 inode_unlock(inode); 5719 } 5720 return rc; 5721 } 5722 5723 static int set_file_allocation_info(struct ksmbd_work *work, 5724 struct ksmbd_file *fp, 5725 struct smb2_file_alloc_info *file_alloc_info) 5726 { 5727 /* 5728 * TODO : It's working fine only when store dos attributes 5729 * is not yes. need to implement a logic which works 5730 * properly with any smb.conf option 5731 */ 5732 5733 loff_t alloc_blks; 5734 struct inode *inode; 5735 int rc; 5736 5737 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5738 return -EACCES; 5739 5740 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 5741 inode = file_inode(fp->filp); 5742 5743 if (alloc_blks > inode->i_blocks) { 5744 smb_break_all_levII_oplock(work, fp, 1); 5745 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 5746 alloc_blks * 512); 5747 if (rc && rc != -EOPNOTSUPP) { 5748 pr_err("vfs_fallocate is failed : %d\n", rc); 5749 return rc; 5750 } 5751 } else if (alloc_blks < inode->i_blocks) { 5752 loff_t size; 5753 5754 /* 5755 * Allocation size could be smaller than original one 5756 * which means allocated blocks in file should be 5757 * deallocated. use truncate to cut out it, but inode 5758 * size is also updated with truncate offset. 5759 * inode size is retained by backup inode size. 5760 */ 5761 size = i_size_read(inode); 5762 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 5763 if (rc) { 5764 pr_err("truncate failed!, err %d\n", rc); 5765 return rc; 5766 } 5767 if (size < alloc_blks * 512) 5768 i_size_write(inode, size); 5769 } 5770 return 0; 5771 } 5772 5773 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5774 struct smb2_file_eof_info *file_eof_info) 5775 { 5776 loff_t newsize; 5777 struct inode *inode; 5778 int rc; 5779 5780 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5781 return -EACCES; 5782 5783 newsize = le64_to_cpu(file_eof_info->EndOfFile); 5784 inode = file_inode(fp->filp); 5785 5786 /* 5787 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 5788 * on FAT32 shared device, truncate execution time is too long 5789 * and network error could cause from windows client. because 5790 * truncate of some filesystem like FAT32 fill zero data in 5791 * truncated range. 5792 */ 5793 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { 5794 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 5795 rc = ksmbd_vfs_truncate(work, fp, newsize); 5796 if (rc) { 5797 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 5798 if (rc != -EAGAIN) 5799 rc = -EBADF; 5800 return rc; 5801 } 5802 } 5803 return 0; 5804 } 5805 5806 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5807 struct smb2_file_rename_info *rename_info, 5808 unsigned int buf_len) 5809 { 5810 if (!(fp->daccess & FILE_DELETE_LE)) { 5811 pr_err("no right to delete : 0x%x\n", fp->daccess); 5812 return -EACCES; 5813 } 5814 5815 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 5816 le32_to_cpu(rename_info->FileNameLength)) 5817 return -EINVAL; 5818 5819 if (!le32_to_cpu(rename_info->FileNameLength)) 5820 return -EINVAL; 5821 5822 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 5823 } 5824 5825 static int set_file_disposition_info(struct ksmbd_file *fp, 5826 struct smb2_file_disposition_info *file_info) 5827 { 5828 struct inode *inode; 5829 5830 if (!(fp->daccess & FILE_DELETE_LE)) { 5831 pr_err("no right to delete : 0x%x\n", fp->daccess); 5832 return -EACCES; 5833 } 5834 5835 inode = file_inode(fp->filp); 5836 if (file_info->DeletePending) { 5837 if (S_ISDIR(inode->i_mode) && 5838 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 5839 return -EBUSY; 5840 ksmbd_set_inode_pending_delete(fp); 5841 } else { 5842 ksmbd_clear_inode_pending_delete(fp); 5843 } 5844 return 0; 5845 } 5846 5847 static int set_file_position_info(struct ksmbd_file *fp, 5848 struct smb2_file_pos_info *file_info) 5849 { 5850 loff_t current_byte_offset; 5851 unsigned long sector_size; 5852 struct inode *inode; 5853 5854 inode = file_inode(fp->filp); 5855 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 5856 sector_size = inode->i_sb->s_blocksize; 5857 5858 if (current_byte_offset < 0 || 5859 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 5860 current_byte_offset & (sector_size - 1))) { 5861 pr_err("CurrentByteOffset is not valid : %llu\n", 5862 current_byte_offset); 5863 return -EINVAL; 5864 } 5865 5866 fp->filp->f_pos = current_byte_offset; 5867 return 0; 5868 } 5869 5870 static int set_file_mode_info(struct ksmbd_file *fp, 5871 struct smb2_file_mode_info *file_info) 5872 { 5873 __le32 mode; 5874 5875 mode = file_info->Mode; 5876 5877 if ((mode & ~FILE_MODE_INFO_MASK)) { 5878 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 5879 return -EINVAL; 5880 } 5881 5882 /* 5883 * TODO : need to implement consideration for 5884 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 5885 */ 5886 ksmbd_vfs_set_fadvise(fp->filp, mode); 5887 fp->coption = mode; 5888 return 0; 5889 } 5890 5891 /** 5892 * smb2_set_info_file() - handler for smb2 set info command 5893 * @work: smb work containing set info command buffer 5894 * @fp: ksmbd_file pointer 5895 * @req: request buffer pointer 5896 * @share: ksmbd_share_config pointer 5897 * 5898 * Return: 0 on success, otherwise error 5899 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH 5900 */ 5901 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 5902 struct smb2_set_info_req *req, 5903 struct ksmbd_share_config *share) 5904 { 5905 unsigned int buf_len = le32_to_cpu(req->BufferLength); 5906 5907 switch (req->FileInfoClass) { 5908 case FILE_BASIC_INFORMATION: 5909 { 5910 if (buf_len < sizeof(struct smb2_file_basic_info)) 5911 return -EINVAL; 5912 5913 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share); 5914 } 5915 case FILE_ALLOCATION_INFORMATION: 5916 { 5917 if (buf_len < sizeof(struct smb2_file_alloc_info)) 5918 return -EINVAL; 5919 5920 return set_file_allocation_info(work, fp, 5921 (struct smb2_file_alloc_info *)req->Buffer); 5922 } 5923 case FILE_END_OF_FILE_INFORMATION: 5924 { 5925 if (buf_len < sizeof(struct smb2_file_eof_info)) 5926 return -EINVAL; 5927 5928 return set_end_of_file_info(work, fp, 5929 (struct smb2_file_eof_info *)req->Buffer); 5930 } 5931 case FILE_RENAME_INFORMATION: 5932 { 5933 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 5934 ksmbd_debug(SMB, 5935 "User does not have write permission\n"); 5936 return -EACCES; 5937 } 5938 5939 if (buf_len < sizeof(struct smb2_file_rename_info)) 5940 return -EINVAL; 5941 5942 return set_rename_info(work, fp, 5943 (struct smb2_file_rename_info *)req->Buffer, 5944 buf_len); 5945 } 5946 case FILE_LINK_INFORMATION: 5947 { 5948 if (buf_len < sizeof(struct smb2_file_link_info)) 5949 return -EINVAL; 5950 5951 return smb2_create_link(work, work->tcon->share_conf, 5952 (struct smb2_file_link_info *)req->Buffer, 5953 buf_len, fp->filp, 5954 work->conn->local_nls); 5955 } 5956 case FILE_DISPOSITION_INFORMATION: 5957 { 5958 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 5959 ksmbd_debug(SMB, 5960 "User does not have write permission\n"); 5961 return -EACCES; 5962 } 5963 5964 if (buf_len < sizeof(struct smb2_file_disposition_info)) 5965 return -EINVAL; 5966 5967 return set_file_disposition_info(fp, 5968 (struct smb2_file_disposition_info *)req->Buffer); 5969 } 5970 case FILE_FULL_EA_INFORMATION: 5971 { 5972 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 5973 pr_err("Not permitted to write ext attr: 0x%x\n", 5974 fp->daccess); 5975 return -EACCES; 5976 } 5977 5978 if (buf_len < sizeof(struct smb2_ea_info)) 5979 return -EINVAL; 5980 5981 return smb2_set_ea((struct smb2_ea_info *)req->Buffer, 5982 buf_len, &fp->filp->f_path); 5983 } 5984 case FILE_POSITION_INFORMATION: 5985 { 5986 if (buf_len < sizeof(struct smb2_file_pos_info)) 5987 return -EINVAL; 5988 5989 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer); 5990 } 5991 case FILE_MODE_INFORMATION: 5992 { 5993 if (buf_len < sizeof(struct smb2_file_mode_info)) 5994 return -EINVAL; 5995 5996 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer); 5997 } 5998 } 5999 6000 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6001 return -EOPNOTSUPP; 6002 } 6003 6004 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6005 char *buffer, int buf_len) 6006 { 6007 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6008 6009 fp->saccess |= FILE_SHARE_DELETE_LE; 6010 6011 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6012 buf_len, false, true); 6013 } 6014 6015 /** 6016 * smb2_set_info() - handler for smb2 set info command handler 6017 * @work: smb work containing set info request buffer 6018 * 6019 * Return: 0 on success, otherwise error 6020 */ 6021 int smb2_set_info(struct ksmbd_work *work) 6022 { 6023 struct smb2_set_info_req *req; 6024 struct smb2_set_info_rsp *rsp; 6025 struct ksmbd_file *fp; 6026 int rc = 0; 6027 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6028 6029 ksmbd_debug(SMB, "Received set info request\n"); 6030 6031 if (work->next_smb2_rcv_hdr_off) { 6032 req = ksmbd_req_buf_next(work); 6033 rsp = ksmbd_resp_buf_next(work); 6034 if (!has_file_id(req->VolatileFileId)) { 6035 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6036 work->compound_fid); 6037 id = work->compound_fid; 6038 pid = work->compound_pfid; 6039 } 6040 } else { 6041 req = smb2_get_msg(work->request_buf); 6042 rsp = smb2_get_msg(work->response_buf); 6043 } 6044 6045 if (!has_file_id(id)) { 6046 id = req->VolatileFileId; 6047 pid = req->PersistentFileId; 6048 } 6049 6050 fp = ksmbd_lookup_fd_slow(work, id, pid); 6051 if (!fp) { 6052 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6053 rc = -ENOENT; 6054 goto err_out; 6055 } 6056 6057 switch (req->InfoType) { 6058 case SMB2_O_INFO_FILE: 6059 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6060 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6061 break; 6062 case SMB2_O_INFO_SECURITY: 6063 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6064 if (ksmbd_override_fsids(work)) { 6065 rc = -ENOMEM; 6066 goto err_out; 6067 } 6068 rc = smb2_set_info_sec(fp, 6069 le32_to_cpu(req->AdditionalInformation), 6070 req->Buffer, 6071 le32_to_cpu(req->BufferLength)); 6072 ksmbd_revert_fsids(work); 6073 break; 6074 default: 6075 rc = -EOPNOTSUPP; 6076 } 6077 6078 if (rc < 0) 6079 goto err_out; 6080 6081 rsp->StructureSize = cpu_to_le16(2); 6082 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6083 sizeof(struct smb2_set_info_rsp)); 6084 if (rc) 6085 goto err_out; 6086 ksmbd_fd_put(work, fp); 6087 return 0; 6088 6089 err_out: 6090 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6091 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6092 else if (rc == -EINVAL) 6093 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6094 else if (rc == -ESHARE) 6095 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6096 else if (rc == -ENOENT) 6097 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6098 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6099 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6100 else if (rc == -EAGAIN) 6101 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6102 else if (rc == -EBADF || rc == -ESTALE) 6103 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6104 else if (rc == -EEXIST) 6105 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6106 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6107 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6108 smb2_set_err_rsp(work); 6109 ksmbd_fd_put(work, fp); 6110 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6111 return rc; 6112 } 6113 6114 /** 6115 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6116 * @work: smb work containing read IPC pipe command buffer 6117 * 6118 * Return: 0 on success, otherwise error 6119 */ 6120 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6121 { 6122 int nbytes = 0, err; 6123 u64 id; 6124 struct ksmbd_rpc_command *rpc_resp; 6125 struct smb2_read_req *req; 6126 struct smb2_read_rsp *rsp; 6127 6128 WORK_BUFFERS(work, req, rsp); 6129 6130 id = req->VolatileFileId; 6131 6132 rpc_resp = ksmbd_rpc_read(work->sess, id); 6133 if (rpc_resp) { 6134 void *aux_payload_buf; 6135 6136 if (rpc_resp->flags != KSMBD_RPC_OK) { 6137 err = -EINVAL; 6138 goto out; 6139 } 6140 6141 aux_payload_buf = 6142 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL); 6143 if (!aux_payload_buf) { 6144 err = -ENOMEM; 6145 goto out; 6146 } 6147 6148 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6149 6150 nbytes = rpc_resp->payload_sz; 6151 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6152 offsetof(struct smb2_read_rsp, Buffer), 6153 aux_payload_buf, nbytes); 6154 if (err) 6155 goto out; 6156 kvfree(rpc_resp); 6157 } else { 6158 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6159 offsetof(struct smb2_read_rsp, Buffer)); 6160 if (err) 6161 goto out; 6162 } 6163 6164 rsp->StructureSize = cpu_to_le16(17); 6165 rsp->DataOffset = 80; 6166 rsp->Reserved = 0; 6167 rsp->DataLength = cpu_to_le32(nbytes); 6168 rsp->DataRemaining = 0; 6169 rsp->Flags = 0; 6170 return 0; 6171 6172 out: 6173 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6174 smb2_set_err_rsp(work); 6175 kvfree(rpc_resp); 6176 return err; 6177 } 6178 6179 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6180 struct smb2_buffer_desc_v1 *desc, 6181 __le32 Channel, 6182 __le16 ChannelInfoLength) 6183 { 6184 unsigned int i, ch_count; 6185 6186 if (work->conn->dialect == SMB30_PROT_ID && 6187 Channel != SMB2_CHANNEL_RDMA_V1) 6188 return -EINVAL; 6189 6190 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6191 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6192 for (i = 0; i < ch_count; i++) { 6193 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6194 i, 6195 le32_to_cpu(desc[i].token), 6196 le32_to_cpu(desc[i].length)); 6197 } 6198 } 6199 if (!ch_count) 6200 return -EINVAL; 6201 6202 work->need_invalidate_rkey = 6203 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6204 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6205 work->remote_key = le32_to_cpu(desc->token); 6206 return 0; 6207 } 6208 6209 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6210 struct smb2_read_req *req, void *data_buf, 6211 size_t length) 6212 { 6213 int err; 6214 6215 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6216 (struct smb2_buffer_desc_v1 *) 6217 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6218 le16_to_cpu(req->ReadChannelInfoLength)); 6219 if (err) 6220 return err; 6221 6222 return length; 6223 } 6224 6225 /** 6226 * smb2_read() - handler for smb2 read from file 6227 * @work: smb work containing read command buffer 6228 * 6229 * Return: 0 on success, otherwise error 6230 */ 6231 int smb2_read(struct ksmbd_work *work) 6232 { 6233 struct ksmbd_conn *conn = work->conn; 6234 struct smb2_read_req *req; 6235 struct smb2_read_rsp *rsp; 6236 struct ksmbd_file *fp = NULL; 6237 loff_t offset; 6238 size_t length, mincount; 6239 ssize_t nbytes = 0, remain_bytes = 0; 6240 int err = 0; 6241 bool is_rdma_channel = false; 6242 unsigned int max_read_size = conn->vals->max_read_size; 6243 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6244 void *aux_payload_buf; 6245 6246 if (test_share_config_flag(work->tcon->share_conf, 6247 KSMBD_SHARE_FLAG_PIPE)) { 6248 ksmbd_debug(SMB, "IPC pipe read request\n"); 6249 return smb2_read_pipe(work); 6250 } 6251 6252 if (work->next_smb2_rcv_hdr_off) { 6253 req = ksmbd_req_buf_next(work); 6254 rsp = ksmbd_resp_buf_next(work); 6255 if (!has_file_id(req->VolatileFileId)) { 6256 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6257 work->compound_fid); 6258 id = work->compound_fid; 6259 pid = work->compound_pfid; 6260 } 6261 } else { 6262 req = smb2_get_msg(work->request_buf); 6263 rsp = smb2_get_msg(work->response_buf); 6264 } 6265 6266 if (!has_file_id(id)) { 6267 id = req->VolatileFileId; 6268 pid = req->PersistentFileId; 6269 } 6270 6271 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6272 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6273 is_rdma_channel = true; 6274 max_read_size = get_smbd_max_read_write_size(); 6275 } 6276 6277 if (is_rdma_channel == true) { 6278 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6279 6280 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6281 err = -EINVAL; 6282 goto out; 6283 } 6284 err = smb2_set_remote_key_for_rdma(work, 6285 (struct smb2_buffer_desc_v1 *) 6286 ((char *)req + ch_offset), 6287 req->Channel, 6288 req->ReadChannelInfoLength); 6289 if (err) 6290 goto out; 6291 } 6292 6293 fp = ksmbd_lookup_fd_slow(work, id, pid); 6294 if (!fp) { 6295 err = -ENOENT; 6296 goto out; 6297 } 6298 6299 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6300 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6301 err = -EACCES; 6302 goto out; 6303 } 6304 6305 offset = le64_to_cpu(req->Offset); 6306 length = le32_to_cpu(req->Length); 6307 mincount = le32_to_cpu(req->MinimumCount); 6308 6309 if (length > max_read_size) { 6310 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6311 max_read_size); 6312 err = -EINVAL; 6313 goto out; 6314 } 6315 6316 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6317 fp->filp, offset, length); 6318 6319 aux_payload_buf = kvzalloc(length, GFP_KERNEL); 6320 if (!aux_payload_buf) { 6321 err = -ENOMEM; 6322 goto out; 6323 } 6324 6325 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6326 if (nbytes < 0) { 6327 err = nbytes; 6328 goto out; 6329 } 6330 6331 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6332 kvfree(aux_payload_buf); 6333 rsp->hdr.Status = STATUS_END_OF_FILE; 6334 smb2_set_err_rsp(work); 6335 ksmbd_fd_put(work, fp); 6336 return 0; 6337 } 6338 6339 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6340 nbytes, offset, mincount); 6341 6342 if (is_rdma_channel == true) { 6343 /* write data to the client using rdma channel */ 6344 remain_bytes = smb2_read_rdma_channel(work, req, 6345 aux_payload_buf, 6346 nbytes); 6347 kvfree(aux_payload_buf); 6348 aux_payload_buf = NULL; 6349 nbytes = 0; 6350 if (remain_bytes < 0) { 6351 err = (int)remain_bytes; 6352 goto out; 6353 } 6354 } 6355 6356 rsp->StructureSize = cpu_to_le16(17); 6357 rsp->DataOffset = 80; 6358 rsp->Reserved = 0; 6359 rsp->DataLength = cpu_to_le32(nbytes); 6360 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6361 rsp->Flags = 0; 6362 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6363 offsetof(struct smb2_read_rsp, Buffer), 6364 aux_payload_buf, nbytes); 6365 if (err) 6366 goto out; 6367 ksmbd_fd_put(work, fp); 6368 return 0; 6369 6370 out: 6371 if (err) { 6372 if (err == -EISDIR) 6373 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6374 else if (err == -EAGAIN) 6375 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6376 else if (err == -ENOENT) 6377 rsp->hdr.Status = STATUS_FILE_CLOSED; 6378 else if (err == -EACCES) 6379 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6380 else if (err == -ESHARE) 6381 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6382 else if (err == -EINVAL) 6383 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6384 else 6385 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6386 6387 smb2_set_err_rsp(work); 6388 } 6389 ksmbd_fd_put(work, fp); 6390 return err; 6391 } 6392 6393 /** 6394 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6395 * @work: smb work containing write IPC pipe command buffer 6396 * 6397 * Return: 0 on success, otherwise error 6398 */ 6399 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6400 { 6401 struct smb2_write_req *req; 6402 struct smb2_write_rsp *rsp; 6403 struct ksmbd_rpc_command *rpc_resp; 6404 u64 id = 0; 6405 int err = 0, ret = 0; 6406 char *data_buf; 6407 size_t length; 6408 6409 WORK_BUFFERS(work, req, rsp); 6410 6411 length = le32_to_cpu(req->Length); 6412 id = req->VolatileFileId; 6413 6414 if ((u64)le16_to_cpu(req->DataOffset) + length > 6415 get_rfc1002_len(work->request_buf)) { 6416 pr_err("invalid write data offset %u, smb_len %u\n", 6417 le16_to_cpu(req->DataOffset), 6418 get_rfc1002_len(work->request_buf)); 6419 err = -EINVAL; 6420 goto out; 6421 } 6422 6423 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6424 le16_to_cpu(req->DataOffset)); 6425 6426 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6427 if (rpc_resp) { 6428 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6429 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6430 kvfree(rpc_resp); 6431 smb2_set_err_rsp(work); 6432 return -EOPNOTSUPP; 6433 } 6434 if (rpc_resp->flags != KSMBD_RPC_OK) { 6435 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6436 smb2_set_err_rsp(work); 6437 kvfree(rpc_resp); 6438 return ret; 6439 } 6440 kvfree(rpc_resp); 6441 } 6442 6443 rsp->StructureSize = cpu_to_le16(17); 6444 rsp->DataOffset = 0; 6445 rsp->Reserved = 0; 6446 rsp->DataLength = cpu_to_le32(length); 6447 rsp->DataRemaining = 0; 6448 rsp->Reserved2 = 0; 6449 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6450 offsetof(struct smb2_write_rsp, Buffer)); 6451 out: 6452 if (err) { 6453 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6454 smb2_set_err_rsp(work); 6455 } 6456 6457 return err; 6458 } 6459 6460 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6461 struct smb2_write_req *req, 6462 struct ksmbd_file *fp, 6463 loff_t offset, size_t length, bool sync) 6464 { 6465 char *data_buf; 6466 int ret; 6467 ssize_t nbytes; 6468 6469 data_buf = kvzalloc(length, GFP_KERNEL); 6470 if (!data_buf) 6471 return -ENOMEM; 6472 6473 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6474 (struct smb2_buffer_desc_v1 *) 6475 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6476 le16_to_cpu(req->WriteChannelInfoLength)); 6477 if (ret < 0) { 6478 kvfree(data_buf); 6479 return ret; 6480 } 6481 6482 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 6483 kvfree(data_buf); 6484 if (ret < 0) 6485 return ret; 6486 6487 return nbytes; 6488 } 6489 6490 /** 6491 * smb2_write() - handler for smb2 write from file 6492 * @work: smb work containing write command buffer 6493 * 6494 * Return: 0 on success, otherwise error 6495 */ 6496 int smb2_write(struct ksmbd_work *work) 6497 { 6498 struct smb2_write_req *req; 6499 struct smb2_write_rsp *rsp; 6500 struct ksmbd_file *fp = NULL; 6501 loff_t offset; 6502 size_t length; 6503 ssize_t nbytes; 6504 char *data_buf; 6505 bool writethrough = false, is_rdma_channel = false; 6506 int err = 0; 6507 unsigned int max_write_size = work->conn->vals->max_write_size; 6508 6509 WORK_BUFFERS(work, req, rsp); 6510 6511 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 6512 ksmbd_debug(SMB, "IPC pipe write request\n"); 6513 return smb2_write_pipe(work); 6514 } 6515 6516 offset = le64_to_cpu(req->Offset); 6517 length = le32_to_cpu(req->Length); 6518 6519 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 6520 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 6521 is_rdma_channel = true; 6522 max_write_size = get_smbd_max_read_write_size(); 6523 length = le32_to_cpu(req->RemainingBytes); 6524 } 6525 6526 if (is_rdma_channel == true) { 6527 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 6528 6529 if (req->Length != 0 || req->DataOffset != 0 || 6530 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 6531 err = -EINVAL; 6532 goto out; 6533 } 6534 err = smb2_set_remote_key_for_rdma(work, 6535 (struct smb2_buffer_desc_v1 *) 6536 ((char *)req + ch_offset), 6537 req->Channel, 6538 req->WriteChannelInfoLength); 6539 if (err) 6540 goto out; 6541 } 6542 6543 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6544 ksmbd_debug(SMB, "User does not have write permission\n"); 6545 err = -EACCES; 6546 goto out; 6547 } 6548 6549 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6550 if (!fp) { 6551 err = -ENOENT; 6552 goto out; 6553 } 6554 6555 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6556 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 6557 err = -EACCES; 6558 goto out; 6559 } 6560 6561 if (length > max_write_size) { 6562 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 6563 max_write_size); 6564 err = -EINVAL; 6565 goto out; 6566 } 6567 6568 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 6569 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 6570 writethrough = true; 6571 6572 if (is_rdma_channel == false) { 6573 if (le16_to_cpu(req->DataOffset) < 6574 offsetof(struct smb2_write_req, Buffer)) { 6575 err = -EINVAL; 6576 goto out; 6577 } 6578 6579 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6580 le16_to_cpu(req->DataOffset)); 6581 6582 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6583 fp->filp, offset, length); 6584 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 6585 writethrough, &nbytes); 6586 if (err < 0) 6587 goto out; 6588 } else { 6589 /* read data from the client using rdma channel, and 6590 * write the data. 6591 */ 6592 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 6593 writethrough); 6594 if (nbytes < 0) { 6595 err = (int)nbytes; 6596 goto out; 6597 } 6598 } 6599 6600 rsp->StructureSize = cpu_to_le16(17); 6601 rsp->DataOffset = 0; 6602 rsp->Reserved = 0; 6603 rsp->DataLength = cpu_to_le32(nbytes); 6604 rsp->DataRemaining = 0; 6605 rsp->Reserved2 = 0; 6606 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 6607 if (err) 6608 goto out; 6609 ksmbd_fd_put(work, fp); 6610 return 0; 6611 6612 out: 6613 if (err == -EAGAIN) 6614 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6615 else if (err == -ENOSPC || err == -EFBIG) 6616 rsp->hdr.Status = STATUS_DISK_FULL; 6617 else if (err == -ENOENT) 6618 rsp->hdr.Status = STATUS_FILE_CLOSED; 6619 else if (err == -EACCES) 6620 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6621 else if (err == -ESHARE) 6622 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6623 else if (err == -EINVAL) 6624 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6625 else 6626 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6627 6628 smb2_set_err_rsp(work); 6629 ksmbd_fd_put(work, fp); 6630 return err; 6631 } 6632 6633 /** 6634 * smb2_flush() - handler for smb2 flush file - fsync 6635 * @work: smb work containing flush command buffer 6636 * 6637 * Return: 0 on success, otherwise error 6638 */ 6639 int smb2_flush(struct ksmbd_work *work) 6640 { 6641 struct smb2_flush_req *req; 6642 struct smb2_flush_rsp *rsp; 6643 int err; 6644 6645 WORK_BUFFERS(work, req, rsp); 6646 6647 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); 6648 6649 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 6650 if (err) 6651 goto out; 6652 6653 rsp->StructureSize = cpu_to_le16(4); 6654 rsp->Reserved = 0; 6655 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 6656 6657 out: 6658 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6659 smb2_set_err_rsp(work); 6660 return err; 6661 } 6662 6663 /** 6664 * smb2_cancel() - handler for smb2 cancel command 6665 * @work: smb work containing cancel command buffer 6666 * 6667 * Return: 0 on success, otherwise error 6668 */ 6669 int smb2_cancel(struct ksmbd_work *work) 6670 { 6671 struct ksmbd_conn *conn = work->conn; 6672 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 6673 struct smb2_hdr *chdr; 6674 struct ksmbd_work *iter; 6675 struct list_head *command_list; 6676 6677 if (work->next_smb2_rcv_hdr_off) 6678 hdr = ksmbd_resp_buf_next(work); 6679 6680 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 6681 hdr->MessageId, hdr->Flags); 6682 6683 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 6684 command_list = &conn->async_requests; 6685 6686 spin_lock(&conn->request_lock); 6687 list_for_each_entry(iter, command_list, 6688 async_request_entry) { 6689 chdr = smb2_get_msg(iter->request_buf); 6690 6691 if (iter->async_id != 6692 le64_to_cpu(hdr->Id.AsyncId)) 6693 continue; 6694 6695 ksmbd_debug(SMB, 6696 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 6697 le64_to_cpu(hdr->Id.AsyncId), 6698 le16_to_cpu(chdr->Command)); 6699 iter->state = KSMBD_WORK_CANCELLED; 6700 if (iter->cancel_fn) 6701 iter->cancel_fn(iter->cancel_argv); 6702 break; 6703 } 6704 spin_unlock(&conn->request_lock); 6705 } else { 6706 command_list = &conn->requests; 6707 6708 spin_lock(&conn->request_lock); 6709 list_for_each_entry(iter, command_list, request_entry) { 6710 chdr = smb2_get_msg(iter->request_buf); 6711 6712 if (chdr->MessageId != hdr->MessageId || 6713 iter == work) 6714 continue; 6715 6716 ksmbd_debug(SMB, 6717 "smb2 with mid %llu cancelled command = 0x%x\n", 6718 le64_to_cpu(hdr->MessageId), 6719 le16_to_cpu(chdr->Command)); 6720 iter->state = KSMBD_WORK_CANCELLED; 6721 break; 6722 } 6723 spin_unlock(&conn->request_lock); 6724 } 6725 6726 /* For SMB2_CANCEL command itself send no response*/ 6727 work->send_no_response = 1; 6728 return 0; 6729 } 6730 6731 struct file_lock *smb_flock_init(struct file *f) 6732 { 6733 struct file_lock *fl; 6734 6735 fl = locks_alloc_lock(); 6736 if (!fl) 6737 goto out; 6738 6739 locks_init_lock(fl); 6740 6741 fl->fl_owner = f; 6742 fl->fl_pid = current->tgid; 6743 fl->fl_file = f; 6744 fl->fl_flags = FL_POSIX; 6745 fl->fl_ops = NULL; 6746 fl->fl_lmops = NULL; 6747 6748 out: 6749 return fl; 6750 } 6751 6752 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 6753 { 6754 int cmd = -EINVAL; 6755 6756 /* Checking for wrong flag combination during lock request*/ 6757 switch (flags) { 6758 case SMB2_LOCKFLAG_SHARED: 6759 ksmbd_debug(SMB, "received shared request\n"); 6760 cmd = F_SETLKW; 6761 flock->fl_type = F_RDLCK; 6762 flock->fl_flags |= FL_SLEEP; 6763 break; 6764 case SMB2_LOCKFLAG_EXCLUSIVE: 6765 ksmbd_debug(SMB, "received exclusive request\n"); 6766 cmd = F_SETLKW; 6767 flock->fl_type = F_WRLCK; 6768 flock->fl_flags |= FL_SLEEP; 6769 break; 6770 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6771 ksmbd_debug(SMB, 6772 "received shared & fail immediately request\n"); 6773 cmd = F_SETLK; 6774 flock->fl_type = F_RDLCK; 6775 break; 6776 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6777 ksmbd_debug(SMB, 6778 "received exclusive & fail immediately request\n"); 6779 cmd = F_SETLK; 6780 flock->fl_type = F_WRLCK; 6781 break; 6782 case SMB2_LOCKFLAG_UNLOCK: 6783 ksmbd_debug(SMB, "received unlock request\n"); 6784 flock->fl_type = F_UNLCK; 6785 cmd = F_SETLK; 6786 break; 6787 } 6788 6789 return cmd; 6790 } 6791 6792 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 6793 unsigned int cmd, int flags, 6794 struct list_head *lock_list) 6795 { 6796 struct ksmbd_lock *lock; 6797 6798 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); 6799 if (!lock) 6800 return NULL; 6801 6802 lock->cmd = cmd; 6803 lock->fl = flock; 6804 lock->start = flock->fl_start; 6805 lock->end = flock->fl_end; 6806 lock->flags = flags; 6807 if (lock->start == lock->end) 6808 lock->zero_len = 1; 6809 INIT_LIST_HEAD(&lock->clist); 6810 INIT_LIST_HEAD(&lock->flist); 6811 INIT_LIST_HEAD(&lock->llist); 6812 list_add_tail(&lock->llist, lock_list); 6813 6814 return lock; 6815 } 6816 6817 static void smb2_remove_blocked_lock(void **argv) 6818 { 6819 struct file_lock *flock = (struct file_lock *)argv[0]; 6820 6821 ksmbd_vfs_posix_lock_unblock(flock); 6822 wake_up(&flock->fl_wait); 6823 } 6824 6825 static inline bool lock_defer_pending(struct file_lock *fl) 6826 { 6827 /* check pending lock waiters */ 6828 return waitqueue_active(&fl->fl_wait); 6829 } 6830 6831 /** 6832 * smb2_lock() - handler for smb2 file lock command 6833 * @work: smb work containing lock command buffer 6834 * 6835 * Return: 0 on success, otherwise error 6836 */ 6837 int smb2_lock(struct ksmbd_work *work) 6838 { 6839 struct smb2_lock_req *req; 6840 struct smb2_lock_rsp *rsp; 6841 struct smb2_lock_element *lock_ele; 6842 struct ksmbd_file *fp = NULL; 6843 struct file_lock *flock = NULL; 6844 struct file *filp = NULL; 6845 int lock_count; 6846 int flags = 0; 6847 int cmd = 0; 6848 int err = -EIO, i, rc = 0; 6849 u64 lock_start, lock_length; 6850 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 6851 struct ksmbd_conn *conn; 6852 int nolock = 0; 6853 LIST_HEAD(lock_list); 6854 LIST_HEAD(rollback_list); 6855 int prior_lock = 0; 6856 6857 WORK_BUFFERS(work, req, rsp); 6858 6859 ksmbd_debug(SMB, "Received lock request\n"); 6860 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6861 if (!fp) { 6862 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 6863 err = -ENOENT; 6864 goto out2; 6865 } 6866 6867 filp = fp->filp; 6868 lock_count = le16_to_cpu(req->LockCount); 6869 lock_ele = req->locks; 6870 6871 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 6872 if (!lock_count) { 6873 err = -EINVAL; 6874 goto out2; 6875 } 6876 6877 for (i = 0; i < lock_count; i++) { 6878 flags = le32_to_cpu(lock_ele[i].Flags); 6879 6880 flock = smb_flock_init(filp); 6881 if (!flock) 6882 goto out; 6883 6884 cmd = smb2_set_flock_flags(flock, flags); 6885 6886 lock_start = le64_to_cpu(lock_ele[i].Offset); 6887 lock_length = le64_to_cpu(lock_ele[i].Length); 6888 if (lock_start > U64_MAX - lock_length) { 6889 pr_err("Invalid lock range requested\n"); 6890 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6891 locks_free_lock(flock); 6892 goto out; 6893 } 6894 6895 if (lock_start > OFFSET_MAX) 6896 flock->fl_start = OFFSET_MAX; 6897 else 6898 flock->fl_start = lock_start; 6899 6900 lock_length = le64_to_cpu(lock_ele[i].Length); 6901 if (lock_length > OFFSET_MAX - flock->fl_start) 6902 lock_length = OFFSET_MAX - flock->fl_start; 6903 6904 flock->fl_end = flock->fl_start + lock_length; 6905 6906 if (flock->fl_end < flock->fl_start) { 6907 ksmbd_debug(SMB, 6908 "the end offset(%llx) is smaller than the start offset(%llx)\n", 6909 flock->fl_end, flock->fl_start); 6910 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6911 locks_free_lock(flock); 6912 goto out; 6913 } 6914 6915 /* Check conflict locks in one request */ 6916 list_for_each_entry(cmp_lock, &lock_list, llist) { 6917 if (cmp_lock->fl->fl_start <= flock->fl_start && 6918 cmp_lock->fl->fl_end >= flock->fl_end) { 6919 if (cmp_lock->fl->fl_type != F_UNLCK && 6920 flock->fl_type != F_UNLCK) { 6921 pr_err("conflict two locks in one request\n"); 6922 err = -EINVAL; 6923 locks_free_lock(flock); 6924 goto out; 6925 } 6926 } 6927 } 6928 6929 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 6930 if (!smb_lock) { 6931 err = -EINVAL; 6932 locks_free_lock(flock); 6933 goto out; 6934 } 6935 } 6936 6937 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 6938 if (smb_lock->cmd < 0) { 6939 err = -EINVAL; 6940 goto out; 6941 } 6942 6943 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 6944 err = -EINVAL; 6945 goto out; 6946 } 6947 6948 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 6949 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 6950 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 6951 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 6952 err = -EINVAL; 6953 goto out; 6954 } 6955 6956 prior_lock = smb_lock->flags; 6957 6958 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 6959 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 6960 goto no_check_cl; 6961 6962 nolock = 1; 6963 /* check locks in connection list */ 6964 down_read(&conn_list_lock); 6965 list_for_each_entry(conn, &conn_list, conns_list) { 6966 spin_lock(&conn->llist_lock); 6967 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 6968 if (file_inode(cmp_lock->fl->fl_file) != 6969 file_inode(smb_lock->fl->fl_file)) 6970 continue; 6971 6972 if (smb_lock->fl->fl_type == F_UNLCK) { 6973 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file && 6974 cmp_lock->start == smb_lock->start && 6975 cmp_lock->end == smb_lock->end && 6976 !lock_defer_pending(cmp_lock->fl)) { 6977 nolock = 0; 6978 list_del(&cmp_lock->flist); 6979 list_del(&cmp_lock->clist); 6980 spin_unlock(&conn->llist_lock); 6981 up_read(&conn_list_lock); 6982 6983 locks_free_lock(cmp_lock->fl); 6984 kfree(cmp_lock); 6985 goto out_check_cl; 6986 } 6987 continue; 6988 } 6989 6990 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) { 6991 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 6992 continue; 6993 } else { 6994 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 6995 continue; 6996 } 6997 6998 /* check zero byte lock range */ 6999 if (cmp_lock->zero_len && !smb_lock->zero_len && 7000 cmp_lock->start > smb_lock->start && 7001 cmp_lock->start < smb_lock->end) { 7002 spin_unlock(&conn->llist_lock); 7003 up_read(&conn_list_lock); 7004 pr_err("previous lock conflict with zero byte lock range\n"); 7005 goto out; 7006 } 7007 7008 if (smb_lock->zero_len && !cmp_lock->zero_len && 7009 smb_lock->start > cmp_lock->start && 7010 smb_lock->start < cmp_lock->end) { 7011 spin_unlock(&conn->llist_lock); 7012 up_read(&conn_list_lock); 7013 pr_err("current lock conflict with zero byte lock range\n"); 7014 goto out; 7015 } 7016 7017 if (((cmp_lock->start <= smb_lock->start && 7018 cmp_lock->end > smb_lock->start) || 7019 (cmp_lock->start < smb_lock->end && 7020 cmp_lock->end >= smb_lock->end)) && 7021 !cmp_lock->zero_len && !smb_lock->zero_len) { 7022 spin_unlock(&conn->llist_lock); 7023 up_read(&conn_list_lock); 7024 pr_err("Not allow lock operation on exclusive lock range\n"); 7025 goto out; 7026 } 7027 } 7028 spin_unlock(&conn->llist_lock); 7029 } 7030 up_read(&conn_list_lock); 7031 out_check_cl: 7032 if (smb_lock->fl->fl_type == F_UNLCK && nolock) { 7033 pr_err("Try to unlock nolocked range\n"); 7034 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7035 goto out; 7036 } 7037 7038 no_check_cl: 7039 if (smb_lock->zero_len) { 7040 err = 0; 7041 goto skip; 7042 } 7043 7044 flock = smb_lock->fl; 7045 list_del(&smb_lock->llist); 7046 retry: 7047 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7048 skip: 7049 if (flags & SMB2_LOCKFLAG_UNLOCK) { 7050 if (!rc) { 7051 ksmbd_debug(SMB, "File unlocked\n"); 7052 } else if (rc == -ENOENT) { 7053 rsp->hdr.Status = STATUS_NOT_LOCKED; 7054 goto out; 7055 } 7056 locks_free_lock(flock); 7057 kfree(smb_lock); 7058 } else { 7059 if (rc == FILE_LOCK_DEFERRED) { 7060 void **argv; 7061 7062 ksmbd_debug(SMB, 7063 "would have to wait for getting lock\n"); 7064 list_add(&smb_lock->llist, &rollback_list); 7065 7066 argv = kmalloc(sizeof(void *), GFP_KERNEL); 7067 if (!argv) { 7068 err = -ENOMEM; 7069 goto out; 7070 } 7071 argv[0] = flock; 7072 7073 rc = setup_async_work(work, 7074 smb2_remove_blocked_lock, 7075 argv); 7076 if (rc) { 7077 kfree(argv); 7078 err = -ENOMEM; 7079 goto out; 7080 } 7081 spin_lock(&fp->f_lock); 7082 list_add(&work->fp_entry, &fp->blocked_works); 7083 spin_unlock(&fp->f_lock); 7084 7085 smb2_send_interim_resp(work, STATUS_PENDING); 7086 7087 ksmbd_vfs_posix_lock_wait(flock); 7088 7089 spin_lock(&fp->f_lock); 7090 list_del(&work->fp_entry); 7091 spin_unlock(&fp->f_lock); 7092 7093 if (work->state != KSMBD_WORK_ACTIVE) { 7094 list_del(&smb_lock->llist); 7095 locks_free_lock(flock); 7096 7097 if (work->state == KSMBD_WORK_CANCELLED) { 7098 rsp->hdr.Status = 7099 STATUS_CANCELLED; 7100 kfree(smb_lock); 7101 smb2_send_interim_resp(work, 7102 STATUS_CANCELLED); 7103 work->send_no_response = 1; 7104 goto out; 7105 } 7106 7107 rsp->hdr.Status = 7108 STATUS_RANGE_NOT_LOCKED; 7109 kfree(smb_lock); 7110 goto out2; 7111 } 7112 7113 list_del(&smb_lock->llist); 7114 release_async_work(work); 7115 goto retry; 7116 } else if (!rc) { 7117 list_add(&smb_lock->llist, &rollback_list); 7118 spin_lock(&work->conn->llist_lock); 7119 list_add_tail(&smb_lock->clist, 7120 &work->conn->lock_list); 7121 list_add_tail(&smb_lock->flist, 7122 &fp->lock_list); 7123 spin_unlock(&work->conn->llist_lock); 7124 ksmbd_debug(SMB, "successful in taking lock\n"); 7125 } else { 7126 goto out; 7127 } 7128 } 7129 } 7130 7131 if (atomic_read(&fp->f_ci->op_count) > 1) 7132 smb_break_all_oplock(work, fp); 7133 7134 rsp->StructureSize = cpu_to_le16(4); 7135 ksmbd_debug(SMB, "successful in taking lock\n"); 7136 rsp->hdr.Status = STATUS_SUCCESS; 7137 rsp->Reserved = 0; 7138 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7139 if (err) 7140 goto out; 7141 7142 ksmbd_fd_put(work, fp); 7143 return 0; 7144 7145 out: 7146 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7147 locks_free_lock(smb_lock->fl); 7148 list_del(&smb_lock->llist); 7149 kfree(smb_lock); 7150 } 7151 7152 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7153 struct file_lock *rlock = NULL; 7154 7155 rlock = smb_flock_init(filp); 7156 rlock->fl_type = F_UNLCK; 7157 rlock->fl_start = smb_lock->start; 7158 rlock->fl_end = smb_lock->end; 7159 7160 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7161 if (rc) 7162 pr_err("rollback unlock fail : %d\n", rc); 7163 7164 list_del(&smb_lock->llist); 7165 spin_lock(&work->conn->llist_lock); 7166 if (!list_empty(&smb_lock->flist)) 7167 list_del(&smb_lock->flist); 7168 list_del(&smb_lock->clist); 7169 spin_unlock(&work->conn->llist_lock); 7170 7171 locks_free_lock(smb_lock->fl); 7172 locks_free_lock(rlock); 7173 kfree(smb_lock); 7174 } 7175 out2: 7176 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7177 7178 if (!rsp->hdr.Status) { 7179 if (err == -EINVAL) 7180 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7181 else if (err == -ENOMEM) 7182 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7183 else if (err == -ENOENT) 7184 rsp->hdr.Status = STATUS_FILE_CLOSED; 7185 else 7186 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7187 } 7188 7189 smb2_set_err_rsp(work); 7190 ksmbd_fd_put(work, fp); 7191 return err; 7192 } 7193 7194 static int fsctl_copychunk(struct ksmbd_work *work, 7195 struct copychunk_ioctl_req *ci_req, 7196 unsigned int cnt_code, 7197 unsigned int input_count, 7198 unsigned long long volatile_id, 7199 unsigned long long persistent_id, 7200 struct smb2_ioctl_rsp *rsp) 7201 { 7202 struct copychunk_ioctl_rsp *ci_rsp; 7203 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7204 struct srv_copychunk *chunks; 7205 unsigned int i, chunk_count, chunk_count_written = 0; 7206 unsigned int chunk_size_written = 0; 7207 loff_t total_size_written = 0; 7208 int ret = 0; 7209 7210 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7211 7212 rsp->VolatileFileId = volatile_id; 7213 rsp->PersistentFileId = persistent_id; 7214 ci_rsp->ChunksWritten = 7215 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7216 ci_rsp->ChunkBytesWritten = 7217 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7218 ci_rsp->TotalBytesWritten = 7219 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7220 7221 chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; 7222 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7223 if (chunk_count == 0) 7224 goto out; 7225 total_size_written = 0; 7226 7227 /* verify the SRV_COPYCHUNK_COPY packet */ 7228 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7229 input_count < offsetof(struct copychunk_ioctl_req, Chunks) + 7230 chunk_count * sizeof(struct srv_copychunk)) { 7231 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7232 return -EINVAL; 7233 } 7234 7235 for (i = 0; i < chunk_count; i++) { 7236 if (le32_to_cpu(chunks[i].Length) == 0 || 7237 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7238 break; 7239 total_size_written += le32_to_cpu(chunks[i].Length); 7240 } 7241 7242 if (i < chunk_count || 7243 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7244 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7245 return -EINVAL; 7246 } 7247 7248 src_fp = ksmbd_lookup_foreign_fd(work, 7249 le64_to_cpu(ci_req->ResumeKey[0])); 7250 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7251 ret = -EINVAL; 7252 if (!src_fp || 7253 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { 7254 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7255 goto out; 7256 } 7257 7258 if (!dst_fp) { 7259 rsp->hdr.Status = STATUS_FILE_CLOSED; 7260 goto out; 7261 } 7262 7263 /* 7264 * FILE_READ_DATA should only be included in 7265 * the FSCTL_COPYCHUNK case 7266 */ 7267 if (cnt_code == FSCTL_COPYCHUNK && 7268 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7269 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7270 goto out; 7271 } 7272 7273 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7274 chunks, chunk_count, 7275 &chunk_count_written, 7276 &chunk_size_written, 7277 &total_size_written); 7278 if (ret < 0) { 7279 if (ret == -EACCES) 7280 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7281 if (ret == -EAGAIN) 7282 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7283 else if (ret == -EBADF) 7284 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7285 else if (ret == -EFBIG || ret == -ENOSPC) 7286 rsp->hdr.Status = STATUS_DISK_FULL; 7287 else if (ret == -EINVAL) 7288 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7289 else if (ret == -EISDIR) 7290 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7291 else if (ret == -E2BIG) 7292 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7293 else 7294 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7295 } 7296 7297 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7298 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7299 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7300 out: 7301 ksmbd_fd_put(work, src_fp); 7302 ksmbd_fd_put(work, dst_fp); 7303 return ret; 7304 } 7305 7306 static __be32 idev_ipv4_address(struct in_device *idev) 7307 { 7308 __be32 addr = 0; 7309 7310 struct in_ifaddr *ifa; 7311 7312 rcu_read_lock(); 7313 in_dev_for_each_ifa_rcu(ifa, idev) { 7314 if (ifa->ifa_flags & IFA_F_SECONDARY) 7315 continue; 7316 7317 addr = ifa->ifa_address; 7318 break; 7319 } 7320 rcu_read_unlock(); 7321 return addr; 7322 } 7323 7324 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7325 struct smb2_ioctl_rsp *rsp, 7326 unsigned int out_buf_len) 7327 { 7328 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7329 int nbytes = 0; 7330 struct net_device *netdev; 7331 struct sockaddr_storage_rsp *sockaddr_storage; 7332 unsigned int flags; 7333 unsigned long long speed; 7334 7335 rtnl_lock(); 7336 for_each_netdev(&init_net, netdev) { 7337 bool ipv4_set = false; 7338 7339 if (netdev->type == ARPHRD_LOOPBACK) 7340 continue; 7341 7342 flags = dev_get_flags(netdev); 7343 if (!(flags & IFF_RUNNING)) 7344 continue; 7345 ipv6_retry: 7346 if (out_buf_len < 7347 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7348 rtnl_unlock(); 7349 return -ENOSPC; 7350 } 7351 7352 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7353 &rsp->Buffer[nbytes]; 7354 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7355 7356 nii_rsp->Capability = 0; 7357 if (netdev->real_num_tx_queues > 1) 7358 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); 7359 if (ksmbd_rdma_capable_netdev(netdev)) 7360 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); 7361 7362 nii_rsp->Next = cpu_to_le32(152); 7363 nii_rsp->Reserved = 0; 7364 7365 if (netdev->ethtool_ops->get_link_ksettings) { 7366 struct ethtool_link_ksettings cmd; 7367 7368 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7369 speed = cmd.base.speed; 7370 } else { 7371 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7372 "speed is unknown, defaulting to 1Gb/sec"); 7373 speed = SPEED_1000; 7374 } 7375 7376 speed *= 1000000; 7377 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7378 7379 sockaddr_storage = (struct sockaddr_storage_rsp *) 7380 nii_rsp->SockAddr_Storage; 7381 memset(sockaddr_storage, 0, 128); 7382 7383 if (!ipv4_set) { 7384 struct in_device *idev; 7385 7386 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); 7387 sockaddr_storage->addr4.Port = 0; 7388 7389 idev = __in_dev_get_rtnl(netdev); 7390 if (!idev) 7391 continue; 7392 sockaddr_storage->addr4.IPv4address = 7393 idev_ipv4_address(idev); 7394 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7395 ipv4_set = true; 7396 goto ipv6_retry; 7397 } else { 7398 struct inet6_dev *idev6; 7399 struct inet6_ifaddr *ifa; 7400 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; 7401 7402 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); 7403 sockaddr_storage->addr6.Port = 0; 7404 sockaddr_storage->addr6.FlowInfo = 0; 7405 7406 idev6 = __in6_dev_get(netdev); 7407 if (!idev6) 7408 continue; 7409 7410 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7411 if (ifa->flags & (IFA_F_TENTATIVE | 7412 IFA_F_DEPRECATED)) 7413 continue; 7414 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7415 break; 7416 } 7417 sockaddr_storage->addr6.ScopeId = 0; 7418 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7419 } 7420 } 7421 rtnl_unlock(); 7422 7423 /* zero if this is last one */ 7424 if (nii_rsp) 7425 nii_rsp->Next = 0; 7426 7427 rsp->PersistentFileId = SMB2_NO_FID; 7428 rsp->VolatileFileId = SMB2_NO_FID; 7429 return nbytes; 7430 } 7431 7432 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7433 struct validate_negotiate_info_req *neg_req, 7434 struct validate_negotiate_info_rsp *neg_rsp, 7435 unsigned int in_buf_len) 7436 { 7437 int ret = 0; 7438 int dialect; 7439 7440 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7441 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7442 return -EINVAL; 7443 7444 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7445 neg_req->DialectCount); 7446 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7447 ret = -EINVAL; 7448 goto err_out; 7449 } 7450 7451 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7452 ret = -EINVAL; 7453 goto err_out; 7454 } 7455 7456 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7457 ret = -EINVAL; 7458 goto err_out; 7459 } 7460 7461 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7462 ret = -EINVAL; 7463 goto err_out; 7464 } 7465 7466 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 7467 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 7468 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 7469 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 7470 err_out: 7471 return ret; 7472 } 7473 7474 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 7475 struct file_allocated_range_buffer *qar_req, 7476 struct file_allocated_range_buffer *qar_rsp, 7477 unsigned int in_count, unsigned int *out_count) 7478 { 7479 struct ksmbd_file *fp; 7480 loff_t start, length; 7481 int ret = 0; 7482 7483 *out_count = 0; 7484 if (in_count == 0) 7485 return -EINVAL; 7486 7487 start = le64_to_cpu(qar_req->file_offset); 7488 length = le64_to_cpu(qar_req->length); 7489 7490 if (start < 0 || length < 0) 7491 return -EINVAL; 7492 7493 fp = ksmbd_lookup_fd_fast(work, id); 7494 if (!fp) 7495 return -ENOENT; 7496 7497 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 7498 qar_rsp, in_count, out_count); 7499 if (ret && ret != -E2BIG) 7500 *out_count = 0; 7501 7502 ksmbd_fd_put(work, fp); 7503 return ret; 7504 } 7505 7506 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 7507 unsigned int out_buf_len, 7508 struct smb2_ioctl_req *req, 7509 struct smb2_ioctl_rsp *rsp) 7510 { 7511 struct ksmbd_rpc_command *rpc_resp; 7512 char *data_buf = (char *)&req->Buffer[0]; 7513 int nbytes = 0; 7514 7515 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 7516 le32_to_cpu(req->InputCount)); 7517 if (rpc_resp) { 7518 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 7519 /* 7520 * set STATUS_SOME_NOT_MAPPED response 7521 * for unknown domain sid. 7522 */ 7523 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 7524 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7525 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7526 goto out; 7527 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 7528 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7529 goto out; 7530 } 7531 7532 nbytes = rpc_resp->payload_sz; 7533 if (rpc_resp->payload_sz > out_buf_len) { 7534 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7535 nbytes = out_buf_len; 7536 } 7537 7538 if (!rpc_resp->payload_sz) { 7539 rsp->hdr.Status = 7540 STATUS_UNEXPECTED_IO_ERROR; 7541 goto out; 7542 } 7543 7544 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 7545 } 7546 out: 7547 kvfree(rpc_resp); 7548 return nbytes; 7549 } 7550 7551 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 7552 struct file_sparse *sparse) 7553 { 7554 struct ksmbd_file *fp; 7555 struct mnt_idmap *idmap; 7556 int ret = 0; 7557 __le32 old_fattr; 7558 7559 fp = ksmbd_lookup_fd_fast(work, id); 7560 if (!fp) 7561 return -ENOENT; 7562 idmap = file_mnt_idmap(fp->filp); 7563 7564 old_fattr = fp->f_ci->m_fattr; 7565 if (sparse->SetSparse) 7566 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 7567 else 7568 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 7569 7570 if (fp->f_ci->m_fattr != old_fattr && 7571 test_share_config_flag(work->tcon->share_conf, 7572 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 7573 struct xattr_dos_attrib da; 7574 7575 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 7576 fp->filp->f_path.dentry, &da); 7577 if (ret <= 0) 7578 goto out; 7579 7580 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 7581 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 7582 &fp->filp->f_path, 7583 &da, true); 7584 if (ret) 7585 fp->f_ci->m_fattr = old_fattr; 7586 } 7587 7588 out: 7589 ksmbd_fd_put(work, fp); 7590 return ret; 7591 } 7592 7593 static int fsctl_request_resume_key(struct ksmbd_work *work, 7594 struct smb2_ioctl_req *req, 7595 struct resume_key_ioctl_rsp *key_rsp) 7596 { 7597 struct ksmbd_file *fp; 7598 7599 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7600 if (!fp) 7601 return -ENOENT; 7602 7603 memset(key_rsp, 0, sizeof(*key_rsp)); 7604 key_rsp->ResumeKey[0] = req->VolatileFileId; 7605 key_rsp->ResumeKey[1] = req->PersistentFileId; 7606 ksmbd_fd_put(work, fp); 7607 7608 return 0; 7609 } 7610 7611 /** 7612 * smb2_ioctl() - handler for smb2 ioctl command 7613 * @work: smb work containing ioctl command buffer 7614 * 7615 * Return: 0 on success, otherwise error 7616 */ 7617 int smb2_ioctl(struct ksmbd_work *work) 7618 { 7619 struct smb2_ioctl_req *req; 7620 struct smb2_ioctl_rsp *rsp; 7621 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 7622 u64 id = KSMBD_NO_FID; 7623 struct ksmbd_conn *conn = work->conn; 7624 int ret = 0; 7625 7626 if (work->next_smb2_rcv_hdr_off) { 7627 req = ksmbd_req_buf_next(work); 7628 rsp = ksmbd_resp_buf_next(work); 7629 if (!has_file_id(req->VolatileFileId)) { 7630 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 7631 work->compound_fid); 7632 id = work->compound_fid; 7633 } 7634 } else { 7635 req = smb2_get_msg(work->request_buf); 7636 rsp = smb2_get_msg(work->response_buf); 7637 } 7638 7639 if (!has_file_id(id)) 7640 id = req->VolatileFileId; 7641 7642 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 7643 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7644 goto out; 7645 } 7646 7647 cnt_code = le32_to_cpu(req->CtlCode); 7648 ret = smb2_calc_max_out_buf_len(work, 48, 7649 le32_to_cpu(req->MaxOutputResponse)); 7650 if (ret < 0) { 7651 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7652 goto out; 7653 } 7654 out_buf_len = (unsigned int)ret; 7655 in_buf_len = le32_to_cpu(req->InputCount); 7656 7657 switch (cnt_code) { 7658 case FSCTL_DFS_GET_REFERRALS: 7659 case FSCTL_DFS_GET_REFERRALS_EX: 7660 /* Not support DFS yet */ 7661 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 7662 goto out; 7663 case FSCTL_CREATE_OR_GET_OBJECT_ID: 7664 { 7665 struct file_object_buf_type1_ioctl_rsp *obj_buf; 7666 7667 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 7668 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 7669 &rsp->Buffer[0]; 7670 7671 /* 7672 * TODO: This is dummy implementation to pass smbtorture 7673 * Need to check correct response later 7674 */ 7675 memset(obj_buf->ObjectId, 0x0, 16); 7676 memset(obj_buf->BirthVolumeId, 0x0, 16); 7677 memset(obj_buf->BirthObjectId, 0x0, 16); 7678 memset(obj_buf->DomainId, 0x0, 16); 7679 7680 break; 7681 } 7682 case FSCTL_PIPE_TRANSCEIVE: 7683 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 7684 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 7685 break; 7686 case FSCTL_VALIDATE_NEGOTIATE_INFO: 7687 if (conn->dialect < SMB30_PROT_ID) { 7688 ret = -EOPNOTSUPP; 7689 goto out; 7690 } 7691 7692 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 7693 Dialects)) { 7694 ret = -EINVAL; 7695 goto out; 7696 } 7697 7698 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 7699 ret = -EINVAL; 7700 goto out; 7701 } 7702 7703 ret = fsctl_validate_negotiate_info(conn, 7704 (struct validate_negotiate_info_req *)&req->Buffer[0], 7705 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 7706 in_buf_len); 7707 if (ret < 0) 7708 goto out; 7709 7710 nbytes = sizeof(struct validate_negotiate_info_rsp); 7711 rsp->PersistentFileId = SMB2_NO_FID; 7712 rsp->VolatileFileId = SMB2_NO_FID; 7713 break; 7714 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 7715 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 7716 if (ret < 0) 7717 goto out; 7718 nbytes = ret; 7719 break; 7720 case FSCTL_REQUEST_RESUME_KEY: 7721 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 7722 ret = -EINVAL; 7723 goto out; 7724 } 7725 7726 ret = fsctl_request_resume_key(work, req, 7727 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 7728 if (ret < 0) 7729 goto out; 7730 rsp->PersistentFileId = req->PersistentFileId; 7731 rsp->VolatileFileId = req->VolatileFileId; 7732 nbytes = sizeof(struct resume_key_ioctl_rsp); 7733 break; 7734 case FSCTL_COPYCHUNK: 7735 case FSCTL_COPYCHUNK_WRITE: 7736 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7737 ksmbd_debug(SMB, 7738 "User does not have write permission\n"); 7739 ret = -EACCES; 7740 goto out; 7741 } 7742 7743 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { 7744 ret = -EINVAL; 7745 goto out; 7746 } 7747 7748 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 7749 ret = -EINVAL; 7750 goto out; 7751 } 7752 7753 nbytes = sizeof(struct copychunk_ioctl_rsp); 7754 rsp->VolatileFileId = req->VolatileFileId; 7755 rsp->PersistentFileId = req->PersistentFileId; 7756 fsctl_copychunk(work, 7757 (struct copychunk_ioctl_req *)&req->Buffer[0], 7758 le32_to_cpu(req->CtlCode), 7759 le32_to_cpu(req->InputCount), 7760 req->VolatileFileId, 7761 req->PersistentFileId, 7762 rsp); 7763 break; 7764 case FSCTL_SET_SPARSE: 7765 if (in_buf_len < sizeof(struct file_sparse)) { 7766 ret = -EINVAL; 7767 goto out; 7768 } 7769 7770 ret = fsctl_set_sparse(work, id, 7771 (struct file_sparse *)&req->Buffer[0]); 7772 if (ret < 0) 7773 goto out; 7774 break; 7775 case FSCTL_SET_ZERO_DATA: 7776 { 7777 struct file_zero_data_information *zero_data; 7778 struct ksmbd_file *fp; 7779 loff_t off, len, bfz; 7780 7781 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7782 ksmbd_debug(SMB, 7783 "User does not have write permission\n"); 7784 ret = -EACCES; 7785 goto out; 7786 } 7787 7788 if (in_buf_len < sizeof(struct file_zero_data_information)) { 7789 ret = -EINVAL; 7790 goto out; 7791 } 7792 7793 zero_data = 7794 (struct file_zero_data_information *)&req->Buffer[0]; 7795 7796 off = le64_to_cpu(zero_data->FileOffset); 7797 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 7798 if (off < 0 || bfz < 0 || off > bfz) { 7799 ret = -EINVAL; 7800 goto out; 7801 } 7802 7803 len = bfz - off; 7804 if (len) { 7805 fp = ksmbd_lookup_fd_fast(work, id); 7806 if (!fp) { 7807 ret = -ENOENT; 7808 goto out; 7809 } 7810 7811 ret = ksmbd_vfs_zero_data(work, fp, off, len); 7812 ksmbd_fd_put(work, fp); 7813 if (ret < 0) 7814 goto out; 7815 } 7816 break; 7817 } 7818 case FSCTL_QUERY_ALLOCATED_RANGES: 7819 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 7820 ret = -EINVAL; 7821 goto out; 7822 } 7823 7824 ret = fsctl_query_allocated_ranges(work, id, 7825 (struct file_allocated_range_buffer *)&req->Buffer[0], 7826 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 7827 out_buf_len / 7828 sizeof(struct file_allocated_range_buffer), &nbytes); 7829 if (ret == -E2BIG) { 7830 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7831 } else if (ret < 0) { 7832 nbytes = 0; 7833 goto out; 7834 } 7835 7836 nbytes *= sizeof(struct file_allocated_range_buffer); 7837 break; 7838 case FSCTL_GET_REPARSE_POINT: 7839 { 7840 struct reparse_data_buffer *reparse_ptr; 7841 struct ksmbd_file *fp; 7842 7843 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 7844 fp = ksmbd_lookup_fd_fast(work, id); 7845 if (!fp) { 7846 pr_err("not found fp!!\n"); 7847 ret = -ENOENT; 7848 goto out; 7849 } 7850 7851 reparse_ptr->ReparseTag = 7852 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 7853 reparse_ptr->ReparseDataLength = 0; 7854 ksmbd_fd_put(work, fp); 7855 nbytes = sizeof(struct reparse_data_buffer); 7856 break; 7857 } 7858 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 7859 { 7860 struct ksmbd_file *fp_in, *fp_out = NULL; 7861 struct duplicate_extents_to_file *dup_ext; 7862 loff_t src_off, dst_off, length, cloned; 7863 7864 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 7865 ret = -EINVAL; 7866 goto out; 7867 } 7868 7869 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0]; 7870 7871 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 7872 dup_ext->PersistentFileHandle); 7873 if (!fp_in) { 7874 pr_err("not found file handle in duplicate extent to file\n"); 7875 ret = -ENOENT; 7876 goto out; 7877 } 7878 7879 fp_out = ksmbd_lookup_fd_fast(work, id); 7880 if (!fp_out) { 7881 pr_err("not found fp\n"); 7882 ret = -ENOENT; 7883 goto dup_ext_out; 7884 } 7885 7886 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 7887 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 7888 length = le64_to_cpu(dup_ext->ByteCount); 7889 /* 7890 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 7891 * should fall back to vfs_copy_file_range(). This could be 7892 * beneficial when re-exporting nfs/smb mount, but note that 7893 * this can result in partial copy that returns an error status. 7894 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 7895 * fall back to vfs_copy_file_range(), should be avoided when 7896 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 7897 */ 7898 cloned = vfs_clone_file_range(fp_in->filp, src_off, 7899 fp_out->filp, dst_off, length, 0); 7900 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 7901 ret = -EOPNOTSUPP; 7902 goto dup_ext_out; 7903 } else if (cloned != length) { 7904 cloned = vfs_copy_file_range(fp_in->filp, src_off, 7905 fp_out->filp, dst_off, 7906 length, 0); 7907 if (cloned != length) { 7908 if (cloned < 0) 7909 ret = cloned; 7910 else 7911 ret = -EINVAL; 7912 } 7913 } 7914 7915 dup_ext_out: 7916 ksmbd_fd_put(work, fp_in); 7917 ksmbd_fd_put(work, fp_out); 7918 if (ret < 0) 7919 goto out; 7920 break; 7921 } 7922 default: 7923 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 7924 cnt_code); 7925 ret = -EOPNOTSUPP; 7926 goto out; 7927 } 7928 7929 rsp->CtlCode = cpu_to_le32(cnt_code); 7930 rsp->InputCount = cpu_to_le32(0); 7931 rsp->InputOffset = cpu_to_le32(112); 7932 rsp->OutputOffset = cpu_to_le32(112); 7933 rsp->OutputCount = cpu_to_le32(nbytes); 7934 rsp->StructureSize = cpu_to_le16(49); 7935 rsp->Reserved = cpu_to_le16(0); 7936 rsp->Flags = cpu_to_le32(0); 7937 rsp->Reserved2 = cpu_to_le32(0); 7938 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 7939 if (!ret) 7940 return ret; 7941 7942 out: 7943 if (ret == -EACCES) 7944 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7945 else if (ret == -ENOENT) 7946 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7947 else if (ret == -EOPNOTSUPP) 7948 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7949 else if (ret == -ENOSPC) 7950 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 7951 else if (ret < 0 || rsp->hdr.Status == 0) 7952 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7953 smb2_set_err_rsp(work); 7954 return 0; 7955 } 7956 7957 /** 7958 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 7959 * @work: smb work containing oplock break command buffer 7960 * 7961 * Return: 0 7962 */ 7963 static void smb20_oplock_break_ack(struct ksmbd_work *work) 7964 { 7965 struct smb2_oplock_break *req; 7966 struct smb2_oplock_break *rsp; 7967 struct ksmbd_file *fp; 7968 struct oplock_info *opinfo = NULL; 7969 __le32 err = 0; 7970 int ret = 0; 7971 u64 volatile_id, persistent_id; 7972 char req_oplevel = 0, rsp_oplevel = 0; 7973 unsigned int oplock_change_type; 7974 7975 WORK_BUFFERS(work, req, rsp); 7976 7977 volatile_id = req->VolatileFid; 7978 persistent_id = req->PersistentFid; 7979 req_oplevel = req->OplockLevel; 7980 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 7981 volatile_id, persistent_id, req_oplevel); 7982 7983 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7984 if (!fp) { 7985 rsp->hdr.Status = STATUS_FILE_CLOSED; 7986 smb2_set_err_rsp(work); 7987 return; 7988 } 7989 7990 opinfo = opinfo_get(fp); 7991 if (!opinfo) { 7992 pr_err("unexpected null oplock_info\n"); 7993 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 7994 smb2_set_err_rsp(work); 7995 ksmbd_fd_put(work, fp); 7996 return; 7997 } 7998 7999 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8000 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8001 goto err_out; 8002 } 8003 8004 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8005 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8006 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8007 goto err_out; 8008 } 8009 8010 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8011 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8012 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8013 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8014 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8015 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8016 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8017 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8018 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8019 oplock_change_type = OPLOCK_READ_TO_NONE; 8020 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8021 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8022 err = STATUS_INVALID_DEVICE_STATE; 8023 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8024 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8025 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8026 oplock_change_type = OPLOCK_WRITE_TO_READ; 8027 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8028 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8029 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8030 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8031 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8032 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8033 oplock_change_type = OPLOCK_READ_TO_NONE; 8034 } else { 8035 oplock_change_type = 0; 8036 } 8037 } else { 8038 oplock_change_type = 0; 8039 } 8040 8041 switch (oplock_change_type) { 8042 case OPLOCK_WRITE_TO_READ: 8043 ret = opinfo_write_to_read(opinfo); 8044 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8045 break; 8046 case OPLOCK_WRITE_TO_NONE: 8047 ret = opinfo_write_to_none(opinfo); 8048 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8049 break; 8050 case OPLOCK_READ_TO_NONE: 8051 ret = opinfo_read_to_none(opinfo); 8052 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8053 break; 8054 default: 8055 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8056 opinfo->level, rsp_oplevel); 8057 } 8058 8059 if (ret < 0) { 8060 rsp->hdr.Status = err; 8061 goto err_out; 8062 } 8063 8064 opinfo->op_state = OPLOCK_STATE_NONE; 8065 wake_up_interruptible_all(&opinfo->oplock_q); 8066 opinfo_put(opinfo); 8067 ksmbd_fd_put(work, fp); 8068 8069 rsp->StructureSize = cpu_to_le16(24); 8070 rsp->OplockLevel = rsp_oplevel; 8071 rsp->Reserved = 0; 8072 rsp->Reserved2 = 0; 8073 rsp->VolatileFid = volatile_id; 8074 rsp->PersistentFid = persistent_id; 8075 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8076 if (!ret) 8077 return; 8078 8079 err_out: 8080 opinfo->op_state = OPLOCK_STATE_NONE; 8081 wake_up_interruptible_all(&opinfo->oplock_q); 8082 8083 opinfo_put(opinfo); 8084 ksmbd_fd_put(work, fp); 8085 smb2_set_err_rsp(work); 8086 } 8087 8088 static int check_lease_state(struct lease *lease, __le32 req_state) 8089 { 8090 if ((lease->new_state == 8091 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8092 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8093 lease->new_state = req_state; 8094 return 0; 8095 } 8096 8097 if (lease->new_state == req_state) 8098 return 0; 8099 8100 return 1; 8101 } 8102 8103 /** 8104 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8105 * @work: smb work containing lease break command buffer 8106 * 8107 * Return: 0 8108 */ 8109 static void smb21_lease_break_ack(struct ksmbd_work *work) 8110 { 8111 struct ksmbd_conn *conn = work->conn; 8112 struct smb2_lease_ack *req; 8113 struct smb2_lease_ack *rsp; 8114 struct oplock_info *opinfo; 8115 __le32 err = 0; 8116 int ret = 0; 8117 unsigned int lease_change_type; 8118 __le32 lease_state; 8119 struct lease *lease; 8120 8121 WORK_BUFFERS(work, req, rsp); 8122 8123 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8124 le32_to_cpu(req->LeaseState)); 8125 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8126 if (!opinfo) { 8127 ksmbd_debug(OPLOCK, "file not opened\n"); 8128 smb2_set_err_rsp(work); 8129 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8130 return; 8131 } 8132 lease = opinfo->o_lease; 8133 8134 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8135 pr_err("unexpected lease break state 0x%x\n", 8136 opinfo->op_state); 8137 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8138 goto err_out; 8139 } 8140 8141 if (check_lease_state(lease, req->LeaseState)) { 8142 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8143 ksmbd_debug(OPLOCK, 8144 "req lease state: 0x%x, expected state: 0x%x\n", 8145 req->LeaseState, lease->new_state); 8146 goto err_out; 8147 } 8148 8149 if (!atomic_read(&opinfo->breaking_cnt)) { 8150 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8151 goto err_out; 8152 } 8153 8154 /* check for bad lease state */ 8155 if (req->LeaseState & 8156 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8157 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8158 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8159 lease_change_type = OPLOCK_WRITE_TO_NONE; 8160 else 8161 lease_change_type = OPLOCK_READ_TO_NONE; 8162 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8163 le32_to_cpu(lease->state), 8164 le32_to_cpu(req->LeaseState)); 8165 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8166 req->LeaseState != SMB2_LEASE_NONE_LE) { 8167 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8168 lease_change_type = OPLOCK_READ_TO_NONE; 8169 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8170 le32_to_cpu(lease->state), 8171 le32_to_cpu(req->LeaseState)); 8172 } else { 8173 /* valid lease state changes */ 8174 err = STATUS_INVALID_DEVICE_STATE; 8175 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8176 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8177 lease_change_type = OPLOCK_WRITE_TO_NONE; 8178 else 8179 lease_change_type = OPLOCK_READ_TO_NONE; 8180 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8181 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8182 lease_change_type = OPLOCK_WRITE_TO_READ; 8183 else 8184 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8185 } else { 8186 lease_change_type = 0; 8187 } 8188 } 8189 8190 switch (lease_change_type) { 8191 case OPLOCK_WRITE_TO_READ: 8192 ret = opinfo_write_to_read(opinfo); 8193 break; 8194 case OPLOCK_READ_HANDLE_TO_READ: 8195 ret = opinfo_read_handle_to_read(opinfo); 8196 break; 8197 case OPLOCK_WRITE_TO_NONE: 8198 ret = opinfo_write_to_none(opinfo); 8199 break; 8200 case OPLOCK_READ_TO_NONE: 8201 ret = opinfo_read_to_none(opinfo); 8202 break; 8203 default: 8204 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8205 le32_to_cpu(lease->state), 8206 le32_to_cpu(req->LeaseState)); 8207 } 8208 8209 lease_state = lease->state; 8210 opinfo->op_state = OPLOCK_STATE_NONE; 8211 wake_up_interruptible_all(&opinfo->oplock_q); 8212 atomic_dec(&opinfo->breaking_cnt); 8213 wake_up_interruptible_all(&opinfo->oplock_brk); 8214 opinfo_put(opinfo); 8215 8216 if (ret < 0) { 8217 rsp->hdr.Status = err; 8218 goto err_out; 8219 } 8220 8221 rsp->StructureSize = cpu_to_le16(36); 8222 rsp->Reserved = 0; 8223 rsp->Flags = 0; 8224 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8225 rsp->LeaseState = lease_state; 8226 rsp->LeaseDuration = 0; 8227 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8228 if (!ret) 8229 return; 8230 8231 err_out: 8232 opinfo->op_state = OPLOCK_STATE_NONE; 8233 wake_up_interruptible_all(&opinfo->oplock_q); 8234 atomic_dec(&opinfo->breaking_cnt); 8235 wake_up_interruptible_all(&opinfo->oplock_brk); 8236 8237 opinfo_put(opinfo); 8238 smb2_set_err_rsp(work); 8239 } 8240 8241 /** 8242 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8243 * @work: smb work containing oplock/lease break command buffer 8244 * 8245 * Return: 0 8246 */ 8247 int smb2_oplock_break(struct ksmbd_work *work) 8248 { 8249 struct smb2_oplock_break *req; 8250 struct smb2_oplock_break *rsp; 8251 8252 WORK_BUFFERS(work, req, rsp); 8253 8254 switch (le16_to_cpu(req->StructureSize)) { 8255 case OP_BREAK_STRUCT_SIZE_20: 8256 smb20_oplock_break_ack(work); 8257 break; 8258 case OP_BREAK_STRUCT_SIZE_21: 8259 smb21_lease_break_ack(work); 8260 break; 8261 default: 8262 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8263 le16_to_cpu(req->StructureSize)); 8264 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8265 smb2_set_err_rsp(work); 8266 } 8267 8268 return 0; 8269 } 8270 8271 /** 8272 * smb2_notify() - handler for smb2 notify request 8273 * @work: smb work containing notify command buffer 8274 * 8275 * Return: 0 8276 */ 8277 int smb2_notify(struct ksmbd_work *work) 8278 { 8279 struct smb2_change_notify_req *req; 8280 struct smb2_change_notify_rsp *rsp; 8281 8282 WORK_BUFFERS(work, req, rsp); 8283 8284 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8285 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8286 smb2_set_err_rsp(work); 8287 return 0; 8288 } 8289 8290 smb2_set_err_rsp(work); 8291 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8292 return 0; 8293 } 8294 8295 /** 8296 * smb2_is_sign_req() - handler for checking packet signing status 8297 * @work: smb work containing notify command buffer 8298 * @command: SMB2 command id 8299 * 8300 * Return: true if packed is signed, false otherwise 8301 */ 8302 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8303 { 8304 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); 8305 8306 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8307 command != SMB2_NEGOTIATE_HE && 8308 command != SMB2_SESSION_SETUP_HE && 8309 command != SMB2_OPLOCK_BREAK_HE) 8310 return true; 8311 8312 return false; 8313 } 8314 8315 /** 8316 * smb2_check_sign_req() - handler for req packet sign processing 8317 * @work: smb work containing notify command buffer 8318 * 8319 * Return: 1 on success, 0 otherwise 8320 */ 8321 int smb2_check_sign_req(struct ksmbd_work *work) 8322 { 8323 struct smb2_hdr *hdr; 8324 char signature_req[SMB2_SIGNATURE_SIZE]; 8325 char signature[SMB2_HMACSHA256_SIZE]; 8326 struct kvec iov[1]; 8327 size_t len; 8328 8329 hdr = smb2_get_msg(work->request_buf); 8330 if (work->next_smb2_rcv_hdr_off) 8331 hdr = ksmbd_req_buf_next(work); 8332 8333 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8334 len = get_rfc1002_len(work->request_buf); 8335 else if (hdr->NextCommand) 8336 len = le32_to_cpu(hdr->NextCommand); 8337 else 8338 len = get_rfc1002_len(work->request_buf) - 8339 work->next_smb2_rcv_hdr_off; 8340 8341 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8342 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8343 8344 iov[0].iov_base = (char *)&hdr->ProtocolId; 8345 iov[0].iov_len = len; 8346 8347 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8348 signature)) 8349 return 0; 8350 8351 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8352 pr_err("bad smb2 signature\n"); 8353 return 0; 8354 } 8355 8356 return 1; 8357 } 8358 8359 /** 8360 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8361 * @work: smb work containing notify command buffer 8362 * 8363 */ 8364 void smb2_set_sign_rsp(struct ksmbd_work *work) 8365 { 8366 struct smb2_hdr *hdr; 8367 char signature[SMB2_HMACSHA256_SIZE]; 8368 struct kvec *iov; 8369 int n_vec = 1; 8370 8371 hdr = ksmbd_resp_buf_curr(work); 8372 hdr->Flags |= SMB2_FLAGS_SIGNED; 8373 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8374 8375 if (hdr->Command == SMB2_READ) { 8376 iov = &work->iov[work->iov_idx - 1]; 8377 n_vec++; 8378 } else { 8379 iov = &work->iov[work->iov_idx]; 8380 } 8381 8382 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8383 signature)) 8384 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8385 } 8386 8387 /** 8388 * smb3_check_sign_req() - handler for req packet sign processing 8389 * @work: smb work containing notify command buffer 8390 * 8391 * Return: 1 on success, 0 otherwise 8392 */ 8393 int smb3_check_sign_req(struct ksmbd_work *work) 8394 { 8395 struct ksmbd_conn *conn = work->conn; 8396 char *signing_key; 8397 struct smb2_hdr *hdr; 8398 struct channel *chann; 8399 char signature_req[SMB2_SIGNATURE_SIZE]; 8400 char signature[SMB2_CMACAES_SIZE]; 8401 struct kvec iov[1]; 8402 size_t len; 8403 8404 hdr = smb2_get_msg(work->request_buf); 8405 if (work->next_smb2_rcv_hdr_off) 8406 hdr = ksmbd_req_buf_next(work); 8407 8408 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8409 len = get_rfc1002_len(work->request_buf); 8410 else if (hdr->NextCommand) 8411 len = le32_to_cpu(hdr->NextCommand); 8412 else 8413 len = get_rfc1002_len(work->request_buf) - 8414 work->next_smb2_rcv_hdr_off; 8415 8416 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8417 signing_key = work->sess->smb3signingkey; 8418 } else { 8419 chann = lookup_chann_list(work->sess, conn); 8420 if (!chann) { 8421 return 0; 8422 } 8423 signing_key = chann->smb3signingkey; 8424 } 8425 8426 if (!signing_key) { 8427 pr_err("SMB3 signing key is not generated\n"); 8428 return 0; 8429 } 8430 8431 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8432 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8433 iov[0].iov_base = (char *)&hdr->ProtocolId; 8434 iov[0].iov_len = len; 8435 8436 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8437 return 0; 8438 8439 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8440 pr_err("bad smb2 signature\n"); 8441 return 0; 8442 } 8443 8444 return 1; 8445 } 8446 8447 /** 8448 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8449 * @work: smb work containing notify command buffer 8450 * 8451 */ 8452 void smb3_set_sign_rsp(struct ksmbd_work *work) 8453 { 8454 struct ksmbd_conn *conn = work->conn; 8455 struct smb2_hdr *hdr; 8456 struct channel *chann; 8457 char signature[SMB2_CMACAES_SIZE]; 8458 struct kvec *iov; 8459 int n_vec = 1; 8460 char *signing_key; 8461 8462 hdr = ksmbd_resp_buf_curr(work); 8463 8464 if (conn->binding == false && 8465 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8466 signing_key = work->sess->smb3signingkey; 8467 } else { 8468 chann = lookup_chann_list(work->sess, work->conn); 8469 if (!chann) { 8470 return; 8471 } 8472 signing_key = chann->smb3signingkey; 8473 } 8474 8475 if (!signing_key) 8476 return; 8477 8478 hdr->Flags |= SMB2_FLAGS_SIGNED; 8479 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8480 8481 if (hdr->Command == SMB2_READ) { 8482 iov = &work->iov[work->iov_idx - 1]; 8483 n_vec++; 8484 } else { 8485 iov = &work->iov[work->iov_idx]; 8486 } 8487 8488 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 8489 signature)) 8490 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8491 } 8492 8493 /** 8494 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 8495 * @work: smb work containing response buffer 8496 * 8497 */ 8498 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 8499 { 8500 struct ksmbd_conn *conn = work->conn; 8501 struct ksmbd_session *sess = work->sess; 8502 struct smb2_hdr *req, *rsp; 8503 8504 if (conn->dialect != SMB311_PROT_ID) 8505 return; 8506 8507 WORK_BUFFERS(work, req, rsp); 8508 8509 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 8510 conn->preauth_info) 8511 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8512 conn->preauth_info->Preauth_HashValue); 8513 8514 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 8515 __u8 *hash_value; 8516 8517 if (conn->binding) { 8518 struct preauth_session *preauth_sess; 8519 8520 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 8521 if (!preauth_sess) 8522 return; 8523 hash_value = preauth_sess->Preauth_HashValue; 8524 } else { 8525 hash_value = sess->Preauth_HashValue; 8526 if (!hash_value) 8527 return; 8528 } 8529 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8530 hash_value); 8531 } 8532 } 8533 8534 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 8535 { 8536 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 8537 struct smb2_hdr *hdr = smb2_get_msg(old_buf); 8538 unsigned int orig_len = get_rfc1002_len(old_buf); 8539 8540 /* tr_buf must be cleared by the caller */ 8541 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 8542 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 8543 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 8544 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 8545 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 8546 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 8547 else 8548 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 8549 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 8550 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 8551 inc_rfc1001_len(tr_buf, orig_len); 8552 } 8553 8554 int smb3_encrypt_resp(struct ksmbd_work *work) 8555 { 8556 struct kvec *iov = work->iov; 8557 int rc = -ENOMEM; 8558 void *tr_buf; 8559 8560 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); 8561 if (!tr_buf) 8562 return rc; 8563 8564 /* fill transform header */ 8565 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 8566 8567 iov[0].iov_base = tr_buf; 8568 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8569 work->tr_buf = tr_buf; 8570 8571 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 8572 } 8573 8574 bool smb3_is_transform_hdr(void *buf) 8575 { 8576 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); 8577 8578 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 8579 } 8580 8581 int smb3_decrypt_req(struct ksmbd_work *work) 8582 { 8583 struct ksmbd_session *sess; 8584 char *buf = work->request_buf; 8585 unsigned int pdu_length = get_rfc1002_len(buf); 8586 struct kvec iov[2]; 8587 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 8588 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); 8589 int rc = 0; 8590 8591 if (pdu_length < sizeof(struct smb2_transform_hdr) || 8592 buf_data_size < sizeof(struct smb2_hdr)) { 8593 pr_err("Transform message is too small (%u)\n", 8594 pdu_length); 8595 return -ECONNABORTED; 8596 } 8597 8598 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 8599 pr_err("Transform message is broken\n"); 8600 return -ECONNABORTED; 8601 } 8602 8603 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 8604 if (!sess) { 8605 pr_err("invalid session id(%llx) in transform header\n", 8606 le64_to_cpu(tr_hdr->SessionId)); 8607 return -ECONNABORTED; 8608 } 8609 8610 iov[0].iov_base = buf; 8611 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8612 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 8613 iov[1].iov_len = buf_data_size; 8614 rc = ksmbd_crypt_message(work, iov, 2, 0); 8615 if (rc) 8616 return rc; 8617 8618 memmove(buf + 4, iov[1].iov_base, buf_data_size); 8619 *(__be32 *)buf = cpu_to_be32(buf_data_size); 8620 8621 return rc; 8622 } 8623 8624 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 8625 { 8626 struct ksmbd_conn *conn = work->conn; 8627 struct ksmbd_session *sess = work->sess; 8628 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); 8629 8630 if (conn->dialect < SMB30_PROT_ID) 8631 return false; 8632 8633 if (work->next_smb2_rcv_hdr_off) 8634 rsp = ksmbd_resp_buf_next(work); 8635 8636 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 8637 sess->user && !user_guest(sess->user) && 8638 rsp->Status == STATUS_SUCCESS) 8639 return true; 8640 return false; 8641 } 8642