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 "../common/smbdirect/smbdirect.h" 27 #include "transport_rdma.h" 28 #include "vfs.h" 29 #include "vfs_cache.h" 30 #include "misc.h" 31 32 #include "server.h" 33 #include "smb_common.h" 34 #include "../common/smb2status.h" 35 #include "ksmbd_work.h" 36 #include "mgmt/user_config.h" 37 #include "mgmt/share_config.h" 38 #include "mgmt/tree_connect.h" 39 #include "mgmt/user_session.h" 40 #include "mgmt/ksmbd_ida.h" 41 #include "ndr.h" 42 #include "transport_tcp.h" 43 44 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) 45 { 46 if (work->next_smb2_rcv_hdr_off) { 47 *req = ksmbd_req_buf_next(work); 48 *rsp = ksmbd_resp_buf_next(work); 49 } else { 50 *req = smb2_get_msg(work->request_buf); 51 *rsp = smb2_get_msg(work->response_buf); 52 } 53 } 54 55 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) 56 57 /** 58 * check_session_id() - check for valid session id in smb header 59 * @conn: connection instance 60 * @id: session id from smb header 61 * 62 * Return: 1 if valid session id, otherwise 0 63 */ 64 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) 65 { 66 struct ksmbd_session *sess; 67 68 if (id == 0 || id == -1) 69 return false; 70 71 sess = ksmbd_session_lookup_all(conn, id); 72 if (sess) { 73 ksmbd_user_session_put(sess); 74 return true; 75 } 76 pr_err("Invalid user session id: %llu\n", id); 77 return false; 78 } 79 80 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) 81 { 82 return xa_load(&sess->ksmbd_chann_list, (long)conn); 83 } 84 85 /** 86 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. 87 * @work: smb work 88 * 89 * Return: 0 if there is a tree connection matched or these are 90 * skipable commands, otherwise error 91 */ 92 int smb2_get_ksmbd_tcon(struct ksmbd_work *work) 93 { 94 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 95 unsigned int cmd = le16_to_cpu(req_hdr->Command); 96 unsigned int tree_id; 97 98 if (cmd == SMB2_TREE_CONNECT_HE || 99 cmd == SMB2_CANCEL_HE || 100 cmd == SMB2_LOGOFF_HE) { 101 ksmbd_debug(SMB, "skip to check tree connect request\n"); 102 return 0; 103 } 104 105 if (xa_empty(&work->sess->tree_conns)) { 106 ksmbd_debug(SMB, "NO tree connected\n"); 107 return -ENOENT; 108 } 109 110 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 111 112 /* 113 * If request is not the first in Compound request, 114 * Just validate tree id in header with work->tcon->id. 115 */ 116 if (work->next_smb2_rcv_hdr_off) { 117 if (!work->tcon) { 118 pr_err("The first operation in the compound does not have tcon\n"); 119 return -EINVAL; 120 } 121 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 122 pr_err("tree id(%u) is different with id(%u) in first operation\n", 123 tree_id, work->tcon->id); 124 return -EINVAL; 125 } 126 return 1; 127 } 128 129 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 130 if (!work->tcon) { 131 pr_err("Invalid tid %d\n", tree_id); 132 return -ENOENT; 133 } 134 135 return 1; 136 } 137 138 /** 139 * smb2_set_err_rsp() - set error response code on smb response 140 * @work: smb work containing response buffer 141 */ 142 void smb2_set_err_rsp(struct ksmbd_work *work) 143 { 144 struct smb2_err_rsp *err_rsp; 145 146 if (work->next_smb2_rcv_hdr_off) 147 err_rsp = ksmbd_resp_buf_next(work); 148 else 149 err_rsp = smb2_get_msg(work->response_buf); 150 151 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 152 int err; 153 154 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 155 err_rsp->ErrorContextCount = 0; 156 err_rsp->Reserved = 0; 157 err_rsp->ByteCount = 0; 158 err_rsp->ErrorData[0] = 0; 159 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, 160 __SMB2_HEADER_STRUCTURE_SIZE + 161 SMB2_ERROR_STRUCTURE_SIZE2); 162 if (err) 163 work->send_no_response = 1; 164 } 165 } 166 167 /** 168 * is_smb2_neg_cmd() - is it smb2 negotiation command 169 * @work: smb work containing smb header 170 * 171 * Return: true if smb2 negotiation command, otherwise false 172 */ 173 bool is_smb2_neg_cmd(struct ksmbd_work *work) 174 { 175 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 176 177 /* is it SMB2 header ? */ 178 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 179 return false; 180 181 /* make sure it is request not response message */ 182 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 183 return false; 184 185 if (hdr->Command != SMB2_NEGOTIATE) 186 return false; 187 188 return true; 189 } 190 191 /** 192 * is_smb2_rsp() - is it smb2 response 193 * @work: smb work containing smb response buffer 194 * 195 * Return: true if smb2 response, otherwise false 196 */ 197 bool is_smb2_rsp(struct ksmbd_work *work) 198 { 199 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); 200 201 /* is it SMB2 header ? */ 202 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 203 return false; 204 205 /* make sure it is response not request message */ 206 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 207 return false; 208 209 return true; 210 } 211 212 /** 213 * get_smb2_cmd_val() - get smb command code from smb header 214 * @work: smb work containing smb request buffer 215 * 216 * Return: smb2 request command value 217 */ 218 u16 get_smb2_cmd_val(struct ksmbd_work *work) 219 { 220 struct smb2_hdr *rcv_hdr; 221 222 if (work->next_smb2_rcv_hdr_off) 223 rcv_hdr = ksmbd_req_buf_next(work); 224 else 225 rcv_hdr = smb2_get_msg(work->request_buf); 226 return le16_to_cpu(rcv_hdr->Command); 227 } 228 229 /** 230 * set_smb2_rsp_status() - set error response code on smb2 header 231 * @work: smb work containing response buffer 232 * @err: error response code 233 */ 234 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 235 { 236 struct smb2_hdr *rsp_hdr; 237 238 rsp_hdr = smb2_get_msg(work->response_buf); 239 rsp_hdr->Status = err; 240 241 work->iov_idx = 0; 242 work->iov_cnt = 0; 243 work->next_smb2_rcv_hdr_off = 0; 244 smb2_set_err_rsp(work); 245 } 246 247 /** 248 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 249 * @work: smb work containing smb request buffer 250 * 251 * smb2 negotiate response is sent in reply of smb1 negotiate command for 252 * dialect auto-negotiation. 253 */ 254 int init_smb2_neg_rsp(struct ksmbd_work *work) 255 { 256 struct smb2_hdr *rsp_hdr; 257 struct smb2_negotiate_rsp *rsp; 258 struct ksmbd_conn *conn = work->conn; 259 int err; 260 261 rsp_hdr = smb2_get_msg(work->response_buf); 262 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 263 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 264 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 265 rsp_hdr->CreditRequest = cpu_to_le16(2); 266 rsp_hdr->Command = SMB2_NEGOTIATE; 267 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 268 rsp_hdr->NextCommand = 0; 269 rsp_hdr->MessageId = 0; 270 rsp_hdr->Id.SyncId.ProcessId = 0; 271 rsp_hdr->Id.SyncId.TreeId = 0; 272 rsp_hdr->SessionId = 0; 273 memset(rsp_hdr->Signature, 0, 16); 274 275 rsp = smb2_get_msg(work->response_buf); 276 277 WARN_ON(ksmbd_conn_good(conn)); 278 279 rsp->StructureSize = cpu_to_le16(65); 280 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 281 rsp->DialectRevision = cpu_to_le16(conn->dialect); 282 /* Not setting conn guid rsp->ServerGUID, as it 283 * not used by client for identifying connection 284 */ 285 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 286 /* Default Max Message Size till SMB2.0, 64K*/ 287 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 288 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 289 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 290 291 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 292 rsp->ServerStartTime = 0; 293 294 rsp->SecurityBufferOffset = cpu_to_le16(128); 295 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 296 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 297 le16_to_cpu(rsp->SecurityBufferOffset)); 298 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 299 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 300 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 301 err = ksmbd_iov_pin_rsp(work, rsp, 302 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); 303 if (err) 304 return err; 305 conn->use_spnego = true; 306 307 ksmbd_conn_set_need_negotiate(conn); 308 return 0; 309 } 310 311 /** 312 * smb2_set_rsp_credits() - set number of credits in response buffer 313 * @work: smb work containing smb response buffer 314 */ 315 int smb2_set_rsp_credits(struct ksmbd_work *work) 316 { 317 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 318 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 319 struct ksmbd_conn *conn = work->conn; 320 unsigned short credits_requested, aux_max; 321 unsigned short credit_charge, credits_granted = 0; 322 323 if (work->send_no_response) 324 return 0; 325 326 hdr->CreditCharge = req_hdr->CreditCharge; 327 328 if (conn->total_credits > conn->vals->max_credits) { 329 hdr->CreditRequest = 0; 330 pr_err("Total credits overflow: %d\n", conn->total_credits); 331 return -EINVAL; 332 } 333 334 credit_charge = max_t(unsigned short, 335 le16_to_cpu(req_hdr->CreditCharge), 1); 336 if (credit_charge > conn->total_credits) { 337 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 338 credit_charge, conn->total_credits); 339 return -EINVAL; 340 } 341 342 conn->total_credits -= credit_charge; 343 conn->outstanding_credits -= credit_charge; 344 credits_requested = max_t(unsigned short, 345 le16_to_cpu(req_hdr->CreditRequest), 1); 346 347 /* according to smb2.credits smbtorture, Windows server 348 * 2016 or later grant up to 8192 credits at once. 349 * 350 * TODO: Need to adjuct CreditRequest value according to 351 * current cpu load 352 */ 353 if (hdr->Command == SMB2_NEGOTIATE) 354 aux_max = 1; 355 else 356 aux_max = conn->vals->max_credits - conn->total_credits; 357 credits_granted = min_t(unsigned short, credits_requested, aux_max); 358 359 conn->total_credits += credits_granted; 360 work->credits_granted += credits_granted; 361 362 if (!req_hdr->NextCommand) { 363 /* Update CreditRequest in last request */ 364 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 365 } 366 ksmbd_debug(SMB, 367 "credits: requested[%d] granted[%d] total_granted[%d]\n", 368 credits_requested, credits_granted, 369 conn->total_credits); 370 return 0; 371 } 372 373 /** 374 * init_chained_smb2_rsp() - initialize smb2 chained response 375 * @work: smb work containing smb response buffer 376 */ 377 static void init_chained_smb2_rsp(struct ksmbd_work *work) 378 { 379 struct smb2_hdr *req = ksmbd_req_buf_next(work); 380 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 381 struct smb2_hdr *rsp_hdr; 382 struct smb2_hdr *rcv_hdr; 383 int next_hdr_offset = 0; 384 int len, new_len; 385 386 /* Len of this response = updated RFC len - offset of previous cmd 387 * in the compound rsp 388 */ 389 390 /* Storing the current local FID which may be needed by subsequent 391 * command in the compound request 392 */ 393 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 394 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 395 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 396 work->compound_sid = le64_to_cpu(rsp->SessionId); 397 } 398 399 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 400 next_hdr_offset = le32_to_cpu(req->NextCommand); 401 402 new_len = ALIGN(len, 8); 403 work->iov[work->iov_idx].iov_len += (new_len - len); 404 inc_rfc1001_len(work->response_buf, new_len - len); 405 rsp->NextCommand = cpu_to_le32(new_len); 406 407 work->next_smb2_rcv_hdr_off += next_hdr_offset; 408 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 409 work->next_smb2_rsp_hdr_off += new_len; 410 ksmbd_debug(SMB, 411 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 412 new_len, work->next_smb2_rcv_hdr_off, 413 work->next_smb2_rsp_hdr_off); 414 415 rsp_hdr = ksmbd_resp_buf_next(work); 416 rcv_hdr = ksmbd_req_buf_next(work); 417 418 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 419 ksmbd_debug(SMB, "related flag should be set\n"); 420 work->compound_fid = KSMBD_NO_FID; 421 work->compound_pfid = KSMBD_NO_FID; 422 } 423 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 424 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 425 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 426 rsp_hdr->Command = rcv_hdr->Command; 427 428 /* 429 * Message is response. We don't grant oplock yet. 430 */ 431 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 432 SMB2_FLAGS_RELATED_OPERATIONS); 433 rsp_hdr->NextCommand = 0; 434 rsp_hdr->MessageId = rcv_hdr->MessageId; 435 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 436 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 437 rsp_hdr->SessionId = rcv_hdr->SessionId; 438 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 439 } 440 441 /** 442 * is_chained_smb2_message() - check for chained command 443 * @work: smb work containing smb request buffer 444 * 445 * Return: true if chained request, otherwise false 446 */ 447 bool is_chained_smb2_message(struct ksmbd_work *work) 448 { 449 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 450 unsigned int len, next_cmd; 451 452 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 453 return false; 454 455 hdr = ksmbd_req_buf_next(work); 456 next_cmd = le32_to_cpu(hdr->NextCommand); 457 if (next_cmd > 0) { 458 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 459 __SMB2_HEADER_STRUCTURE_SIZE > 460 get_rfc1002_len(work->request_buf)) { 461 pr_err("next command(%u) offset exceeds smb msg size\n", 462 next_cmd); 463 return false; 464 } 465 466 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 467 work->response_sz) { 468 pr_err("next response offset exceeds response buffer size\n"); 469 return false; 470 } 471 472 ksmbd_debug(SMB, "got SMB2 chained command\n"); 473 init_chained_smb2_rsp(work); 474 return true; 475 } else if (work->next_smb2_rcv_hdr_off) { 476 /* 477 * This is last request in chained command, 478 * align response to 8 byte 479 */ 480 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 481 len = len - get_rfc1002_len(work->response_buf); 482 if (len) { 483 ksmbd_debug(SMB, "padding len %u\n", len); 484 work->iov[work->iov_idx].iov_len += len; 485 inc_rfc1001_len(work->response_buf, len); 486 } 487 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 488 } 489 return false; 490 } 491 492 /** 493 * init_smb2_rsp_hdr() - initialize smb2 response 494 * @work: smb work containing smb request buffer 495 * 496 * Return: 0 497 */ 498 int init_smb2_rsp_hdr(struct ksmbd_work *work) 499 { 500 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); 501 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); 502 503 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 504 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 505 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 506 rsp_hdr->Command = rcv_hdr->Command; 507 508 /* 509 * Message is response. We don't grant oplock yet. 510 */ 511 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 512 rsp_hdr->NextCommand = 0; 513 rsp_hdr->MessageId = rcv_hdr->MessageId; 514 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 515 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 516 rsp_hdr->SessionId = rcv_hdr->SessionId; 517 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 518 519 return 0; 520 } 521 522 /** 523 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 524 * @work: smb work containing smb request buffer 525 * 526 * Return: 0 on success, otherwise error 527 */ 528 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 529 { 530 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 531 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 532 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 533 size_t sz = small_sz; 534 int cmd = le16_to_cpu(hdr->Command); 535 536 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 537 sz = large_sz; 538 539 if (cmd == SMB2_QUERY_INFO_HE) { 540 struct smb2_query_info_req *req; 541 542 if (get_rfc1002_len(work->request_buf) < 543 offsetof(struct smb2_query_info_req, OutputBufferLength)) 544 return -EINVAL; 545 546 req = smb2_get_msg(work->request_buf); 547 if ((req->InfoType == SMB2_O_INFO_FILE && 548 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 549 req->FileInfoClass == FILE_ALL_INFORMATION)) || 550 req->InfoType == SMB2_O_INFO_SECURITY) 551 sz = large_sz; 552 } 553 554 /* allocate large response buf for chained commands */ 555 if (le32_to_cpu(hdr->NextCommand) > 0) 556 sz = large_sz; 557 558 work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP); 559 if (!work->response_buf) 560 return -ENOMEM; 561 562 work->response_sz = sz; 563 return 0; 564 } 565 566 /** 567 * smb2_check_user_session() - check for valid session for a user 568 * @work: smb work containing smb request buffer 569 * 570 * Return: 0 on success, otherwise error 571 */ 572 int smb2_check_user_session(struct ksmbd_work *work) 573 { 574 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 575 struct ksmbd_conn *conn = work->conn; 576 unsigned int cmd = le16_to_cpu(req_hdr->Command); 577 unsigned long long sess_id; 578 579 /* 580 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 581 * require a session id, so no need to validate user session's for 582 * these commands. 583 */ 584 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 585 cmd == SMB2_SESSION_SETUP_HE) 586 return 0; 587 588 if (!ksmbd_conn_good(conn)) 589 return -EIO; 590 591 sess_id = le64_to_cpu(req_hdr->SessionId); 592 593 /* 594 * If request is not the first in Compound request, 595 * Just validate session id in header with work->sess->id. 596 */ 597 if (work->next_smb2_rcv_hdr_off) { 598 if (!work->sess) { 599 pr_err("The first operation in the compound does not have sess\n"); 600 return -EINVAL; 601 } 602 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 603 pr_err("session id(%llu) is different with the first operation(%lld)\n", 604 sess_id, work->sess->id); 605 return -EINVAL; 606 } 607 return 1; 608 } 609 610 /* Check for validity of user session */ 611 work->sess = ksmbd_session_lookup_all(conn, sess_id); 612 if (work->sess) 613 return 1; 614 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 615 return -ENOENT; 616 } 617 618 /** 619 * smb2_get_name() - get filename string from on the wire smb format 620 * @src: source buffer 621 * @maxlen: maxlen of source string 622 * @local_nls: nls_table pointer 623 * 624 * Return: matching converted filename on success, otherwise error ptr 625 */ 626 static char * 627 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 628 { 629 char *name; 630 631 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 632 if (IS_ERR(name)) { 633 pr_err("failed to get name %ld\n", PTR_ERR(name)); 634 return name; 635 } 636 637 if (*name == '\0') { 638 kfree(name); 639 return ERR_PTR(-EINVAL); 640 } 641 642 if (*name == '\\') { 643 pr_err("not allow directory name included leading slash\n"); 644 kfree(name); 645 return ERR_PTR(-EINVAL); 646 } 647 648 ksmbd_conv_path_to_unix(name); 649 ksmbd_strip_last_slash(name); 650 return name; 651 } 652 653 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 654 { 655 struct ksmbd_conn *conn = work->conn; 656 int id; 657 658 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 659 if (id < 0) { 660 pr_err("Failed to alloc async message id\n"); 661 return id; 662 } 663 work->asynchronous = true; 664 work->async_id = id; 665 666 ksmbd_debug(SMB, 667 "Send interim Response to inform async request id : %d\n", 668 work->async_id); 669 670 work->cancel_fn = fn; 671 work->cancel_argv = arg; 672 673 if (list_empty(&work->async_request_entry)) { 674 spin_lock(&conn->request_lock); 675 list_add_tail(&work->async_request_entry, &conn->async_requests); 676 spin_unlock(&conn->request_lock); 677 } 678 679 return 0; 680 } 681 682 void release_async_work(struct ksmbd_work *work) 683 { 684 struct ksmbd_conn *conn = work->conn; 685 686 spin_lock(&conn->request_lock); 687 list_del_init(&work->async_request_entry); 688 spin_unlock(&conn->request_lock); 689 690 work->asynchronous = 0; 691 work->cancel_fn = NULL; 692 kfree(work->cancel_argv); 693 work->cancel_argv = NULL; 694 if (work->async_id) { 695 ksmbd_release_id(&conn->async_ida, work->async_id); 696 work->async_id = 0; 697 } 698 } 699 700 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 701 { 702 struct smb2_hdr *rsp_hdr; 703 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 704 705 if (!in_work) 706 return; 707 708 if (allocate_interim_rsp_buf(in_work)) { 709 pr_err("smb_allocate_rsp_buf failed!\n"); 710 ksmbd_free_work_struct(in_work); 711 return; 712 } 713 714 in_work->conn = work->conn; 715 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 716 __SMB2_HEADER_STRUCTURE_SIZE); 717 718 rsp_hdr = smb2_get_msg(in_work->response_buf); 719 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 720 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); 721 smb2_set_err_rsp(in_work); 722 rsp_hdr->Status = status; 723 724 ksmbd_conn_write(in_work); 725 ksmbd_free_work_struct(in_work); 726 } 727 728 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 729 { 730 if (S_ISDIR(mode) || S_ISREG(mode)) 731 return 0; 732 733 if (S_ISLNK(mode)) 734 return IO_REPARSE_TAG_LX_SYMLINK_LE; 735 else if (S_ISFIFO(mode)) 736 return IO_REPARSE_TAG_LX_FIFO_LE; 737 else if (S_ISSOCK(mode)) 738 return IO_REPARSE_TAG_AF_UNIX_LE; 739 else if (S_ISCHR(mode)) 740 return IO_REPARSE_TAG_LX_CHR_LE; 741 else if (S_ISBLK(mode)) 742 return IO_REPARSE_TAG_LX_BLK_LE; 743 744 return 0; 745 } 746 747 /** 748 * smb2_get_dos_mode() - get file mode in dos format from unix mode 749 * @stat: kstat containing file mode 750 * @attribute: attribute flags 751 * 752 * Return: converted dos mode 753 */ 754 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 755 { 756 int attr = 0; 757 758 if (S_ISDIR(stat->mode)) { 759 attr = FILE_ATTRIBUTE_DIRECTORY | 760 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 761 } else { 762 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 763 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 764 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 765 FILE_SUPPORTS_SPARSE_FILES)) 766 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 767 768 if (smb2_get_reparse_tag_special_file(stat->mode)) 769 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 770 } 771 772 return attr; 773 } 774 775 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 776 __le16 hash_id) 777 { 778 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 779 pneg_ctxt->DataLength = cpu_to_le16(38); 780 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 781 pneg_ctxt->Reserved = cpu_to_le32(0); 782 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 783 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 784 pneg_ctxt->HashAlgorithms = hash_id; 785 } 786 787 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 788 __le16 cipher_type) 789 { 790 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 791 pneg_ctxt->DataLength = cpu_to_le16(4); 792 pneg_ctxt->Reserved = cpu_to_le32(0); 793 pneg_ctxt->CipherCount = cpu_to_le16(1); 794 pneg_ctxt->Ciphers[0] = cipher_type; 795 } 796 797 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 798 __le16 sign_algo) 799 { 800 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 801 pneg_ctxt->DataLength = 802 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 803 - sizeof(struct smb2_neg_context)); 804 pneg_ctxt->Reserved = cpu_to_le32(0); 805 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 806 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 807 } 808 809 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 810 { 811 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 812 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 813 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 814 pneg_ctxt->Name[0] = 0x93; 815 pneg_ctxt->Name[1] = 0xAD; 816 pneg_ctxt->Name[2] = 0x25; 817 pneg_ctxt->Name[3] = 0x50; 818 pneg_ctxt->Name[4] = 0x9C; 819 pneg_ctxt->Name[5] = 0xB4; 820 pneg_ctxt->Name[6] = 0x11; 821 pneg_ctxt->Name[7] = 0xE7; 822 pneg_ctxt->Name[8] = 0xB4; 823 pneg_ctxt->Name[9] = 0x23; 824 pneg_ctxt->Name[10] = 0x83; 825 pneg_ctxt->Name[11] = 0xDE; 826 pneg_ctxt->Name[12] = 0x96; 827 pneg_ctxt->Name[13] = 0x8B; 828 pneg_ctxt->Name[14] = 0xCD; 829 pneg_ctxt->Name[15] = 0x7C; 830 } 831 832 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 833 struct smb2_negotiate_rsp *rsp) 834 { 835 char * const pneg_ctxt = (char *)rsp + 836 le32_to_cpu(rsp->NegotiateContextOffset); 837 int neg_ctxt_cnt = 1; 838 int ctxt_size; 839 840 ksmbd_debug(SMB, 841 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 842 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 843 conn->preauth_info->Preauth_HashId); 844 ctxt_size = sizeof(struct smb2_preauth_neg_context); 845 846 if (conn->cipher_type) { 847 /* Round to 8 byte boundary */ 848 ctxt_size = round_up(ctxt_size, 8); 849 ksmbd_debug(SMB, 850 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 851 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 852 (pneg_ctxt + ctxt_size), 853 conn->cipher_type); 854 neg_ctxt_cnt++; 855 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 856 } 857 858 /* compression context not yet supported */ 859 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 860 861 if (conn->posix_ext_supported) { 862 ctxt_size = round_up(ctxt_size, 8); 863 ksmbd_debug(SMB, 864 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 865 build_posix_ctxt((struct smb2_posix_neg_context *) 866 (pneg_ctxt + ctxt_size)); 867 neg_ctxt_cnt++; 868 ctxt_size += sizeof(struct smb2_posix_neg_context); 869 } 870 871 if (conn->signing_negotiated) { 872 ctxt_size = round_up(ctxt_size, 8); 873 ksmbd_debug(SMB, 874 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 875 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 876 (pneg_ctxt + ctxt_size), 877 conn->signing_algorithm); 878 neg_ctxt_cnt++; 879 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 880 } 881 882 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 883 return ctxt_size + AUTH_GSS_PADDING; 884 } 885 886 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 887 struct smb2_preauth_neg_context *pneg_ctxt, 888 int ctxt_len) 889 { 890 /* 891 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 892 * which may not be present. Only check for used HashAlgorithms[1]. 893 */ 894 if (ctxt_len < 895 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 896 return STATUS_INVALID_PARAMETER; 897 898 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 899 return STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 900 901 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 902 return STATUS_SUCCESS; 903 } 904 905 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 906 struct smb2_encryption_neg_context *pneg_ctxt, 907 int ctxt_len) 908 { 909 int cph_cnt; 910 int i, cphs_size; 911 912 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 913 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 914 return; 915 } 916 917 conn->cipher_type = 0; 918 919 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 920 cphs_size = cph_cnt * sizeof(__le16); 921 922 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 923 ctxt_len) { 924 pr_err("Invalid cipher count(%d)\n", cph_cnt); 925 return; 926 } 927 928 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 929 return; 930 931 for (i = 0; i < cph_cnt; i++) { 932 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 933 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 934 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 935 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 936 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 937 pneg_ctxt->Ciphers[i]); 938 conn->cipher_type = pneg_ctxt->Ciphers[i]; 939 break; 940 } 941 } 942 } 943 944 /** 945 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 946 * @conn: smb connection 947 * 948 * Return: true if connection should be encrypted, else false 949 */ 950 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 951 { 952 if (!conn->ops->generate_encryptionkey) 953 return false; 954 955 /* 956 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 957 * SMB 3.1.1 uses the cipher_type field. 958 */ 959 return (conn->vals->req_capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 960 conn->cipher_type; 961 } 962 963 static void decode_compress_ctxt(struct ksmbd_conn *conn, 964 struct smb2_compression_capabilities_context *pneg_ctxt) 965 { 966 conn->compress_algorithm = SMB3_COMPRESS_NONE; 967 } 968 969 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 970 struct smb2_signing_capabilities *pneg_ctxt, 971 int ctxt_len) 972 { 973 int sign_algo_cnt; 974 int i, sign_alos_size; 975 976 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 977 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 978 return; 979 } 980 981 conn->signing_negotiated = false; 982 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 983 sign_alos_size = sign_algo_cnt * sizeof(__le16); 984 985 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 986 ctxt_len) { 987 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 988 return; 989 } 990 991 for (i = 0; i < sign_algo_cnt; i++) { 992 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 993 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 994 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 995 pneg_ctxt->SigningAlgorithms[i]); 996 conn->signing_negotiated = true; 997 conn->signing_algorithm = 998 pneg_ctxt->SigningAlgorithms[i]; 999 break; 1000 } 1001 } 1002 } 1003 1004 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 1005 struct smb2_negotiate_req *req, 1006 unsigned int len_of_smb) 1007 { 1008 /* +4 is to account for the RFC1001 len field */ 1009 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1010 int i = 0, len_of_ctxts; 1011 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1012 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1013 __le32 status = STATUS_INVALID_PARAMETER; 1014 1015 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1016 if (len_of_smb <= offset) { 1017 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1018 return status; 1019 } 1020 1021 len_of_ctxts = len_of_smb - offset; 1022 1023 while (i++ < neg_ctxt_cnt) { 1024 int clen, ctxt_len; 1025 1026 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1027 break; 1028 1029 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1030 clen = le16_to_cpu(pctx->DataLength); 1031 ctxt_len = clen + sizeof(struct smb2_neg_context); 1032 1033 if (ctxt_len > len_of_ctxts) 1034 break; 1035 1036 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1037 ksmbd_debug(SMB, 1038 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1039 if (conn->preauth_info->Preauth_HashId) 1040 break; 1041 1042 status = decode_preauth_ctxt(conn, 1043 (struct smb2_preauth_neg_context *)pctx, 1044 ctxt_len); 1045 if (status != STATUS_SUCCESS) 1046 break; 1047 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1048 ksmbd_debug(SMB, 1049 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1050 if (conn->cipher_type) 1051 break; 1052 1053 decode_encrypt_ctxt(conn, 1054 (struct smb2_encryption_neg_context *)pctx, 1055 ctxt_len); 1056 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1057 ksmbd_debug(SMB, 1058 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1059 if (conn->compress_algorithm) 1060 break; 1061 1062 decode_compress_ctxt(conn, 1063 (struct smb2_compression_capabilities_context *)pctx); 1064 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1065 ksmbd_debug(SMB, 1066 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1067 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1068 ksmbd_debug(SMB, 1069 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1070 conn->posix_ext_supported = true; 1071 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1072 ksmbd_debug(SMB, 1073 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1074 1075 decode_sign_cap_ctxt(conn, 1076 (struct smb2_signing_capabilities *)pctx, 1077 ctxt_len); 1078 } 1079 1080 /* offsets must be 8 byte aligned */ 1081 offset = (ctxt_len + 7) & ~0x7; 1082 len_of_ctxts -= offset; 1083 } 1084 return status; 1085 } 1086 1087 /** 1088 * smb2_handle_negotiate() - handler for smb2 negotiate command 1089 * @work: smb work containing smb request buffer 1090 * 1091 * Return: 0 1092 */ 1093 int smb2_handle_negotiate(struct ksmbd_work *work) 1094 { 1095 struct ksmbd_conn *conn = work->conn; 1096 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); 1097 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); 1098 int rc = 0; 1099 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1100 __le32 status; 1101 1102 ksmbd_debug(SMB, "Received negotiate request\n"); 1103 conn->need_neg = false; 1104 if (ksmbd_conn_good(conn)) { 1105 pr_err("conn->tcp_status is already in CifsGood State\n"); 1106 work->send_no_response = 1; 1107 return rc; 1108 } 1109 1110 ksmbd_conn_lock(conn); 1111 smb2_buf_len = get_rfc1002_len(work->request_buf); 1112 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1113 if (smb2_neg_size > smb2_buf_len) { 1114 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1115 rc = -EINVAL; 1116 goto err_out; 1117 } 1118 1119 if (req->DialectCount == 0) { 1120 pr_err("malformed packet\n"); 1121 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1122 rc = -EINVAL; 1123 goto err_out; 1124 } 1125 1126 if (conn->dialect == SMB311_PROT_ID) { 1127 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1128 1129 if (smb2_buf_len < nego_ctxt_off) { 1130 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1131 rc = -EINVAL; 1132 goto err_out; 1133 } 1134 1135 if (smb2_neg_size > nego_ctxt_off) { 1136 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1137 rc = -EINVAL; 1138 goto err_out; 1139 } 1140 1141 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1142 nego_ctxt_off) { 1143 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1144 rc = -EINVAL; 1145 goto err_out; 1146 } 1147 } else { 1148 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1149 smb2_buf_len) { 1150 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1151 rc = -EINVAL; 1152 goto err_out; 1153 } 1154 } 1155 1156 conn->cli_cap = le32_to_cpu(req->Capabilities); 1157 switch (conn->dialect) { 1158 case SMB311_PROT_ID: 1159 conn->preauth_info = 1160 kzalloc(sizeof(struct preauth_integrity_info), 1161 KSMBD_DEFAULT_GFP); 1162 if (!conn->preauth_info) { 1163 rc = -ENOMEM; 1164 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1165 goto err_out; 1166 } 1167 1168 status = deassemble_neg_contexts(conn, req, 1169 get_rfc1002_len(work->request_buf)); 1170 if (status != STATUS_SUCCESS) { 1171 pr_err("deassemble_neg_contexts error(0x%x)\n", 1172 status); 1173 rsp->hdr.Status = status; 1174 rc = -EINVAL; 1175 kfree(conn->preauth_info); 1176 conn->preauth_info = NULL; 1177 goto err_out; 1178 } 1179 1180 rc = init_smb3_11_server(conn); 1181 if (rc < 0) { 1182 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1183 kfree(conn->preauth_info); 1184 conn->preauth_info = NULL; 1185 goto err_out; 1186 } 1187 1188 ksmbd_gen_preauth_integrity_hash(conn, 1189 work->request_buf, 1190 conn->preauth_info->Preauth_HashValue); 1191 rsp->NegotiateContextOffset = 1192 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1193 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1194 break; 1195 case SMB302_PROT_ID: 1196 init_smb3_02_server(conn); 1197 break; 1198 case SMB30_PROT_ID: 1199 init_smb3_0_server(conn); 1200 break; 1201 case SMB21_PROT_ID: 1202 init_smb2_1_server(conn); 1203 break; 1204 case SMB2X_PROT_ID: 1205 case BAD_PROT_ID: 1206 default: 1207 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1208 conn->dialect); 1209 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1210 rc = -EINVAL; 1211 goto err_out; 1212 } 1213 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 1214 1215 /* For stats */ 1216 conn->connection_type = conn->dialect; 1217 1218 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1219 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1220 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1221 1222 memcpy(conn->ClientGUID, req->ClientGUID, 1223 SMB2_CLIENT_GUID_SIZE); 1224 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1225 1226 rsp->StructureSize = cpu_to_le16(65); 1227 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1228 /* Not setting conn guid rsp->ServerGUID, as it 1229 * not used by client for identifying server 1230 */ 1231 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1232 1233 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1234 rsp->ServerStartTime = 0; 1235 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1236 le32_to_cpu(rsp->NegotiateContextOffset), 1237 le16_to_cpu(rsp->NegotiateContextCount)); 1238 1239 rsp->SecurityBufferOffset = cpu_to_le16(128); 1240 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1241 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1242 le16_to_cpu(rsp->SecurityBufferOffset)); 1243 1244 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1245 conn->use_spnego = true; 1246 1247 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1248 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1249 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1250 conn->sign = true; 1251 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1252 server_conf.enforced_signing = true; 1253 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1254 conn->sign = true; 1255 } 1256 1257 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1258 ksmbd_conn_set_need_setup(conn); 1259 1260 err_out: 1261 ksmbd_conn_unlock(conn); 1262 if (rc) 1263 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1264 1265 if (!rc) 1266 rc = ksmbd_iov_pin_rsp(work, rsp, 1267 sizeof(struct smb2_negotiate_rsp) + 1268 AUTH_GSS_LENGTH + neg_ctxt_len); 1269 if (rc < 0) 1270 smb2_set_err_rsp(work); 1271 return rc; 1272 } 1273 1274 static int alloc_preauth_hash(struct ksmbd_session *sess, 1275 struct ksmbd_conn *conn) 1276 { 1277 if (sess->Preauth_HashValue) 1278 return 0; 1279 1280 if (!conn->preauth_info) 1281 return -ENOMEM; 1282 1283 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1284 PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP); 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 = (struct challenge_message *)rsp->Buffer; 1356 memset(chgblob, 0, sizeof(struct challenge_message)); 1357 1358 if (!work->conn->use_spnego) { 1359 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1360 if (sz < 0) 1361 return -ENOMEM; 1362 1363 rsp->SecurityBufferLength = cpu_to_le16(sz); 1364 return 0; 1365 } 1366 1367 sz = sizeof(struct challenge_message); 1368 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1369 1370 neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP); 1371 if (!neg_blob) 1372 return -ENOMEM; 1373 1374 chgblob = (struct challenge_message *)neg_blob; 1375 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1376 if (sz < 0) { 1377 rc = -ENOMEM; 1378 goto out; 1379 } 1380 1381 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1382 neg_blob, sz); 1383 if (rc) { 1384 rc = -ENOMEM; 1385 goto out; 1386 } 1387 1388 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1389 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1390 1391 out: 1392 kfree(spnego_blob); 1393 kfree(neg_blob); 1394 return rc; 1395 } 1396 1397 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1398 struct smb2_sess_setup_req *req) 1399 { 1400 int sz; 1401 1402 if (conn->use_spnego && conn->mechToken) 1403 return (struct authenticate_message *)conn->mechToken; 1404 1405 sz = le16_to_cpu(req->SecurityBufferOffset); 1406 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1407 + sz); 1408 } 1409 1410 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1411 struct smb2_sess_setup_req *req) 1412 { 1413 struct authenticate_message *authblob; 1414 struct ksmbd_user *user; 1415 char *name; 1416 unsigned int name_off, name_len, secbuf_len; 1417 1418 if (conn->use_spnego && conn->mechToken) 1419 secbuf_len = conn->mechTokenLen; 1420 else 1421 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1422 if (secbuf_len < sizeof(struct authenticate_message)) { 1423 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1424 return NULL; 1425 } 1426 authblob = user_authblob(conn, req); 1427 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1428 name_len = le16_to_cpu(authblob->UserName.Length); 1429 1430 if (secbuf_len < (u64)name_off + name_len) 1431 return NULL; 1432 1433 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1434 name_len, 1435 true, 1436 conn->local_nls); 1437 if (IS_ERR(name)) { 1438 pr_err("cannot allocate memory\n"); 1439 return NULL; 1440 } 1441 1442 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1443 user = ksmbd_login_user(name); 1444 kfree(name); 1445 return user; 1446 } 1447 1448 static int ntlm_authenticate(struct ksmbd_work *work, 1449 struct smb2_sess_setup_req *req, 1450 struct smb2_sess_setup_rsp *rsp) 1451 { 1452 struct ksmbd_conn *conn = work->conn; 1453 struct ksmbd_session *sess = work->sess; 1454 struct channel *chann = NULL, *old; 1455 struct ksmbd_user *user; 1456 u64 prev_id; 1457 int sz, rc; 1458 1459 ksmbd_debug(SMB, "authenticate phase\n"); 1460 if (conn->use_spnego) { 1461 unsigned char *spnego_blob; 1462 u16 spnego_blob_len; 1463 1464 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1465 &spnego_blob_len, 1466 0); 1467 if (rc) 1468 return -ENOMEM; 1469 1470 memcpy(rsp->Buffer, 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 if (conn->use_spnego && conn->mechToken) 1512 sz = conn->mechTokenLen; 1513 else 1514 sz = le16_to_cpu(req->SecurityBufferLength); 1515 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1516 if (rc) { 1517 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1518 ksmbd_debug(SMB, "authentication failed\n"); 1519 return -EPERM; 1520 } 1521 } 1522 1523 /* 1524 * If session state is SMB2_SESSION_VALID, We can assume 1525 * that it is reauthentication. And the user/password 1526 * has been verified, so return it here. 1527 */ 1528 if (sess->state == SMB2_SESSION_VALID) { 1529 if (conn->binding) 1530 goto binding_session; 1531 return 0; 1532 } 1533 1534 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1535 (conn->sign || server_conf.enforced_signing)) || 1536 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1537 sess->sign = true; 1538 1539 if (smb3_encryption_negotiated(conn) && 1540 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1541 conn->ops->generate_encryptionkey(conn, sess); 1542 sess->enc = true; 1543 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1544 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1545 /* 1546 * signing is disable if encryption is enable 1547 * on this session 1548 */ 1549 sess->sign = false; 1550 } 1551 1552 binding_session: 1553 if (conn->dialect >= SMB30_PROT_ID) { 1554 chann = lookup_chann_list(sess, conn); 1555 if (!chann) { 1556 chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP); 1557 if (!chann) 1558 return -ENOMEM; 1559 1560 chann->conn = conn; 1561 old = xa_store(&sess->ksmbd_chann_list, (long)conn, chann, 1562 KSMBD_DEFAULT_GFP); 1563 if (xa_is_err(old)) { 1564 kfree(chann); 1565 return xa_err(old); 1566 } 1567 } 1568 } 1569 1570 if (conn->ops->generate_signingkey) { 1571 rc = conn->ops->generate_signingkey(sess, conn); 1572 if (rc) { 1573 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1574 return -EINVAL; 1575 } 1576 } 1577 1578 if (!ksmbd_conn_lookup_dialect(conn)) { 1579 pr_err("fail to verify the dialect\n"); 1580 return -ENOENT; 1581 } 1582 return 0; 1583 } 1584 1585 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1586 static int krb5_authenticate(struct ksmbd_work *work, 1587 struct smb2_sess_setup_req *req, 1588 struct smb2_sess_setup_rsp *rsp) 1589 { 1590 struct ksmbd_conn *conn = work->conn; 1591 struct ksmbd_session *sess = work->sess; 1592 char *in_blob, *out_blob; 1593 struct channel *chann = NULL, *old; 1594 u64 prev_sess_id; 1595 int in_len, out_len; 1596 int retval; 1597 1598 in_blob = (char *)&req->hdr.ProtocolId + 1599 le16_to_cpu(req->SecurityBufferOffset); 1600 in_len = le16_to_cpu(req->SecurityBufferLength); 1601 out_blob = (char *)&rsp->hdr.ProtocolId + 1602 le16_to_cpu(rsp->SecurityBufferOffset); 1603 out_len = work->response_sz - 1604 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1605 1606 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1607 out_blob, &out_len); 1608 if (retval) { 1609 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1610 return -EINVAL; 1611 } 1612 1613 /* Check previous session */ 1614 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1615 if (prev_sess_id && prev_sess_id != sess->id) 1616 destroy_previous_session(conn, sess->user, prev_sess_id); 1617 1618 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1619 1620 /* 1621 * If session state is SMB2_SESSION_VALID, We can assume 1622 * that it is reauthentication. And the user/password 1623 * has been verified, so return it here. 1624 */ 1625 if (sess->state == SMB2_SESSION_VALID) { 1626 if (conn->binding) 1627 goto binding_session; 1628 return 0; 1629 } 1630 1631 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1632 (conn->sign || server_conf.enforced_signing)) || 1633 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1634 sess->sign = true; 1635 1636 if (smb3_encryption_negotiated(conn) && 1637 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1638 conn->ops->generate_encryptionkey(conn, sess); 1639 sess->enc = true; 1640 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1641 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1642 sess->sign = false; 1643 } 1644 1645 binding_session: 1646 if (conn->dialect >= SMB30_PROT_ID) { 1647 chann = lookup_chann_list(sess, conn); 1648 if (!chann) { 1649 chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP); 1650 if (!chann) 1651 return -ENOMEM; 1652 1653 chann->conn = conn; 1654 old = xa_store(&sess->ksmbd_chann_list, (long)conn, 1655 chann, KSMBD_DEFAULT_GFP); 1656 if (xa_is_err(old)) { 1657 kfree(chann); 1658 return xa_err(old); 1659 } 1660 } 1661 } 1662 1663 if (conn->ops->generate_signingkey) { 1664 retval = conn->ops->generate_signingkey(sess, conn); 1665 if (retval) { 1666 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1667 return -EINVAL; 1668 } 1669 } 1670 1671 if (!ksmbd_conn_lookup_dialect(conn)) { 1672 pr_err("fail to verify the dialect\n"); 1673 return -ENOENT; 1674 } 1675 return 0; 1676 } 1677 #else 1678 static int krb5_authenticate(struct ksmbd_work *work, 1679 struct smb2_sess_setup_req *req, 1680 struct smb2_sess_setup_rsp *rsp) 1681 { 1682 return -EOPNOTSUPP; 1683 } 1684 #endif 1685 1686 int smb2_sess_setup(struct ksmbd_work *work) 1687 { 1688 struct ksmbd_conn *conn = work->conn; 1689 struct smb2_sess_setup_req *req; 1690 struct smb2_sess_setup_rsp *rsp; 1691 struct ksmbd_session *sess; 1692 struct negotiate_message *negblob; 1693 unsigned int negblob_len, negblob_off; 1694 int rc = 0; 1695 1696 ksmbd_debug(SMB, "Received smb2 session setup request\n"); 1697 1698 if (!ksmbd_conn_need_setup(conn) && !ksmbd_conn_good(conn)) { 1699 work->send_no_response = 1; 1700 return rc; 1701 } 1702 1703 WORK_BUFFERS(work, req, rsp); 1704 1705 rsp->StructureSize = cpu_to_le16(9); 1706 rsp->SessionFlags = 0; 1707 rsp->SecurityBufferOffset = cpu_to_le16(72); 1708 rsp->SecurityBufferLength = 0; 1709 1710 ksmbd_conn_lock(conn); 1711 if (!req->hdr.SessionId) { 1712 sess = ksmbd_smb2_session_create(); 1713 if (!sess) { 1714 rc = -ENOMEM; 1715 goto out_err; 1716 } 1717 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1718 rc = ksmbd_session_register(conn, sess); 1719 if (rc) 1720 goto out_err; 1721 1722 conn->binding = false; 1723 } else if (conn->dialect >= SMB30_PROT_ID && 1724 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1725 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1726 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1727 1728 sess = ksmbd_session_lookup_slowpath(sess_id); 1729 if (!sess) { 1730 rc = -ENOENT; 1731 goto out_err; 1732 } 1733 1734 if (conn->dialect != sess->dialect) { 1735 rc = -EINVAL; 1736 goto out_err; 1737 } 1738 1739 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1740 rc = -EINVAL; 1741 goto out_err; 1742 } 1743 1744 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1745 SMB2_CLIENT_GUID_SIZE)) { 1746 rc = -ENOENT; 1747 goto out_err; 1748 } 1749 1750 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1751 rc = -EACCES; 1752 goto out_err; 1753 } 1754 1755 if (sess->state == SMB2_SESSION_EXPIRED) { 1756 rc = -EFAULT; 1757 goto out_err; 1758 } 1759 1760 if (ksmbd_conn_need_reconnect(conn)) { 1761 rc = -EFAULT; 1762 ksmbd_user_session_put(sess); 1763 sess = NULL; 1764 goto out_err; 1765 } 1766 1767 if (is_ksmbd_session_in_connection(conn, sess_id)) { 1768 rc = -EACCES; 1769 goto out_err; 1770 } 1771 1772 if (user_guest(sess->user)) { 1773 rc = -EOPNOTSUPP; 1774 goto out_err; 1775 } 1776 1777 conn->binding = true; 1778 } else if ((conn->dialect < SMB30_PROT_ID || 1779 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1780 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1781 sess = NULL; 1782 rc = -EACCES; 1783 goto out_err; 1784 } else { 1785 sess = ksmbd_session_lookup(conn, 1786 le64_to_cpu(req->hdr.SessionId)); 1787 if (!sess) { 1788 rc = -ENOENT; 1789 goto out_err; 1790 } 1791 1792 if (sess->state == SMB2_SESSION_EXPIRED) { 1793 rc = -EFAULT; 1794 goto out_err; 1795 } 1796 1797 if (ksmbd_conn_need_reconnect(conn)) { 1798 rc = -EFAULT; 1799 ksmbd_user_session_put(sess); 1800 sess = NULL; 1801 goto out_err; 1802 } 1803 1804 conn->binding = false; 1805 } 1806 work->sess = sess; 1807 1808 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1809 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1810 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { 1811 rc = -EINVAL; 1812 goto out_err; 1813 } 1814 1815 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1816 negblob_off); 1817 1818 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1819 if (conn->mechToken) { 1820 negblob = (struct negotiate_message *)conn->mechToken; 1821 negblob_len = conn->mechTokenLen; 1822 } 1823 } 1824 1825 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1826 rc = -EINVAL; 1827 goto out_err; 1828 } 1829 1830 if (server_conf.auth_mechs & conn->auth_mechs) { 1831 rc = generate_preauth_hash(work); 1832 if (rc) 1833 goto out_err; 1834 1835 if (conn->preferred_auth_mech & 1836 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1837 rc = krb5_authenticate(work, req, rsp); 1838 if (rc) { 1839 rc = -EINVAL; 1840 goto out_err; 1841 } 1842 1843 if (!ksmbd_conn_need_reconnect(conn)) { 1844 ksmbd_conn_set_good(conn); 1845 sess->state = SMB2_SESSION_VALID; 1846 } 1847 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1848 if (negblob->MessageType == NtLmNegotiate) { 1849 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1850 if (rc) 1851 goto out_err; 1852 rsp->hdr.Status = 1853 STATUS_MORE_PROCESSING_REQUIRED; 1854 } else if (negblob->MessageType == NtLmAuthenticate) { 1855 rc = ntlm_authenticate(work, req, rsp); 1856 if (rc) 1857 goto out_err; 1858 1859 if (!ksmbd_conn_need_reconnect(conn)) { 1860 ksmbd_conn_set_good(conn); 1861 sess->state = SMB2_SESSION_VALID; 1862 } 1863 if (conn->binding) { 1864 struct preauth_session *preauth_sess; 1865 1866 preauth_sess = 1867 ksmbd_preauth_session_lookup(conn, sess->id); 1868 if (preauth_sess) { 1869 list_del(&preauth_sess->preauth_entry); 1870 kfree(preauth_sess); 1871 } 1872 } 1873 } else { 1874 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1875 le32_to_cpu(negblob->MessageType)); 1876 rc = -EINVAL; 1877 } 1878 } else { 1879 /* TODO: need one more negotiation */ 1880 pr_err("Not support the preferred authentication\n"); 1881 rc = -EINVAL; 1882 } 1883 } else { 1884 pr_err("Not support authentication\n"); 1885 rc = -EINVAL; 1886 } 1887 1888 out_err: 1889 if (rc == -EINVAL) 1890 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1891 else if (rc == -ENOENT) 1892 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1893 else if (rc == -EACCES) 1894 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1895 else if (rc == -EFAULT) 1896 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1897 else if (rc == -ENOMEM) 1898 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1899 else if (rc == -EOPNOTSUPP) 1900 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1901 else if (rc) 1902 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1903 1904 if (conn->use_spnego && conn->mechToken) { 1905 kfree(conn->mechToken); 1906 conn->mechToken = NULL; 1907 } 1908 1909 if (rc < 0) { 1910 /* 1911 * SecurityBufferOffset should be set to zero 1912 * in session setup error response. 1913 */ 1914 rsp->SecurityBufferOffset = 0; 1915 1916 if (sess) { 1917 bool try_delay = false; 1918 1919 /* 1920 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1921 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1922 * failure to make it harder to send enough random connection requests 1923 * to break into a server. 1924 */ 1925 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1926 try_delay = true; 1927 1928 sess->last_active = jiffies; 1929 sess->state = SMB2_SESSION_EXPIRED; 1930 ksmbd_user_session_put(sess); 1931 work->sess = NULL; 1932 if (try_delay) { 1933 ksmbd_conn_set_need_reconnect(conn); 1934 ssleep(5); 1935 ksmbd_conn_set_need_setup(conn); 1936 } 1937 } 1938 smb2_set_err_rsp(work); 1939 } else { 1940 unsigned int iov_len; 1941 1942 if (rsp->SecurityBufferLength) 1943 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1944 le16_to_cpu(rsp->SecurityBufferLength); 1945 else 1946 iov_len = sizeof(struct smb2_sess_setup_rsp); 1947 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1948 if (rc) 1949 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1950 } 1951 1952 ksmbd_conn_unlock(conn); 1953 return rc; 1954 } 1955 1956 /** 1957 * smb2_tree_connect() - handler for smb2 tree connect command 1958 * @work: smb work containing smb request buffer 1959 * 1960 * Return: 0 on success, otherwise error 1961 */ 1962 int smb2_tree_connect(struct ksmbd_work *work) 1963 { 1964 struct ksmbd_conn *conn = work->conn; 1965 struct smb2_tree_connect_req *req; 1966 struct smb2_tree_connect_rsp *rsp; 1967 struct ksmbd_session *sess = work->sess; 1968 char *treename = NULL, *name = NULL; 1969 struct ksmbd_tree_conn_status status; 1970 struct ksmbd_share_config *share = NULL; 1971 int rc = -EINVAL; 1972 1973 ksmbd_debug(SMB, "Received smb2 tree connect request\n"); 1974 1975 WORK_BUFFERS(work, req, rsp); 1976 1977 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), 1978 le16_to_cpu(req->PathLength), true, 1979 conn->local_nls); 1980 if (IS_ERR(treename)) { 1981 pr_err("treename is NULL\n"); 1982 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1983 goto out_err1; 1984 } 1985 1986 name = ksmbd_extract_sharename(conn->um, treename); 1987 if (IS_ERR(name)) { 1988 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1989 goto out_err1; 1990 } 1991 1992 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 1993 name, treename); 1994 1995 status = ksmbd_tree_conn_connect(work, name); 1996 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 1997 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 1998 else 1999 goto out_err1; 2000 2001 share = status.tree_conn->share_conf; 2002 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2003 ksmbd_debug(SMB, "IPC share path request\n"); 2004 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 2005 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2006 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 2007 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 2008 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2009 FILE_SYNCHRONIZE_LE; 2010 } else { 2011 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 2012 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2013 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 2014 if (test_tree_conn_flag(status.tree_conn, 2015 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2016 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 2017 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 2018 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 2019 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 2020 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2021 FILE_SYNCHRONIZE_LE; 2022 } 2023 } 2024 2025 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 2026 if (conn->posix_ext_supported) 2027 status.tree_conn->posix_extensions = true; 2028 2029 write_lock(&sess->tree_conns_lock); 2030 status.tree_conn->t_state = TREE_CONNECTED; 2031 write_unlock(&sess->tree_conns_lock); 2032 rsp->StructureSize = cpu_to_le16(16); 2033 out_err1: 2034 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share && 2035 test_share_config_flag(share, 2036 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 2037 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY; 2038 else 2039 rsp->Capabilities = 0; 2040 rsp->Reserved = 0; 2041 /* default manual caching */ 2042 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2043 2044 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2045 if (rc) 2046 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2047 2048 if (!IS_ERR(treename)) 2049 kfree(treename); 2050 if (!IS_ERR(name)) 2051 kfree(name); 2052 2053 switch (status.ret) { 2054 case KSMBD_TREE_CONN_STATUS_OK: 2055 rsp->hdr.Status = STATUS_SUCCESS; 2056 rc = 0; 2057 break; 2058 case -ESTALE: 2059 case -ENOENT: 2060 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2061 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2062 break; 2063 case -ENOMEM: 2064 case KSMBD_TREE_CONN_STATUS_NOMEM: 2065 rsp->hdr.Status = STATUS_NO_MEMORY; 2066 break; 2067 case KSMBD_TREE_CONN_STATUS_ERROR: 2068 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2069 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2070 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2071 break; 2072 case -EINVAL: 2073 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2074 break; 2075 default: 2076 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2077 } 2078 2079 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2080 smb2_set_err_rsp(work); 2081 2082 return rc; 2083 } 2084 2085 /** 2086 * smb2_create_open_flags() - convert smb open flags to unix open flags 2087 * @file_present: is file already present 2088 * @access: file access flags 2089 * @disposition: file disposition flags 2090 * @may_flags: set with MAY_ flags 2091 * @coptions: file creation options 2092 * @mode: file mode 2093 * 2094 * Return: file open flags 2095 */ 2096 static int smb2_create_open_flags(bool file_present, __le32 access, 2097 __le32 disposition, 2098 int *may_flags, 2099 __le32 coptions, 2100 umode_t mode) 2101 { 2102 int oflags = O_NONBLOCK | O_LARGEFILE; 2103 2104 if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) { 2105 access &= ~FILE_WRITE_DESIRE_ACCESS_LE; 2106 ksmbd_debug(SMB, "Discard write access to a directory\n"); 2107 } 2108 2109 if (access & FILE_READ_DESIRED_ACCESS_LE && 2110 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2111 oflags |= O_RDWR; 2112 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2113 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2114 oflags |= O_WRONLY; 2115 *may_flags = MAY_OPEN | MAY_WRITE; 2116 } else { 2117 oflags |= O_RDONLY; 2118 *may_flags = MAY_OPEN | MAY_READ; 2119 } 2120 2121 if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode)) 2122 oflags |= O_PATH; 2123 2124 if (file_present) { 2125 switch (disposition & FILE_CREATE_MASK_LE) { 2126 case FILE_OPEN_LE: 2127 case FILE_CREATE_LE: 2128 break; 2129 case FILE_SUPERSEDE_LE: 2130 case FILE_OVERWRITE_LE: 2131 case FILE_OVERWRITE_IF_LE: 2132 oflags |= O_TRUNC; 2133 break; 2134 default: 2135 break; 2136 } 2137 } else { 2138 switch (disposition & FILE_CREATE_MASK_LE) { 2139 case FILE_SUPERSEDE_LE: 2140 case FILE_CREATE_LE: 2141 case FILE_OPEN_IF_LE: 2142 case FILE_OVERWRITE_IF_LE: 2143 oflags |= O_CREAT; 2144 break; 2145 case FILE_OPEN_LE: 2146 case FILE_OVERWRITE_LE: 2147 oflags &= ~O_CREAT; 2148 break; 2149 default: 2150 break; 2151 } 2152 } 2153 2154 return oflags; 2155 } 2156 2157 /** 2158 * smb2_tree_disconnect() - handler for smb tree connect request 2159 * @work: smb work containing request buffer 2160 * 2161 * Return: 0 on success, otherwise error 2162 */ 2163 int smb2_tree_disconnect(struct ksmbd_work *work) 2164 { 2165 struct smb2_tree_disconnect_rsp *rsp; 2166 struct smb2_tree_disconnect_req *req; 2167 struct ksmbd_session *sess = work->sess; 2168 struct ksmbd_tree_connect *tcon = work->tcon; 2169 int err; 2170 2171 ksmbd_debug(SMB, "Received smb2 tree disconnect request\n"); 2172 2173 WORK_BUFFERS(work, req, rsp); 2174 2175 if (!tcon) { 2176 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2177 2178 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2179 err = -ENOENT; 2180 goto err_out; 2181 } 2182 2183 ksmbd_close_tree_conn_fds(work); 2184 2185 write_lock(&sess->tree_conns_lock); 2186 if (tcon->t_state == TREE_DISCONNECTED) { 2187 write_unlock(&sess->tree_conns_lock); 2188 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2189 err = -ENOENT; 2190 goto err_out; 2191 } 2192 2193 tcon->t_state = TREE_DISCONNECTED; 2194 write_unlock(&sess->tree_conns_lock); 2195 2196 err = ksmbd_tree_conn_disconnect(sess, tcon); 2197 if (err) { 2198 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2199 goto err_out; 2200 } 2201 2202 rsp->StructureSize = cpu_to_le16(4); 2203 err = ksmbd_iov_pin_rsp(work, rsp, 2204 sizeof(struct smb2_tree_disconnect_rsp)); 2205 if (err) { 2206 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2207 goto err_out; 2208 } 2209 2210 return 0; 2211 2212 err_out: 2213 smb2_set_err_rsp(work); 2214 return err; 2215 2216 } 2217 2218 /** 2219 * smb2_session_logoff() - handler for session log off request 2220 * @work: smb work containing request buffer 2221 * 2222 * Return: 0 on success, otherwise error 2223 */ 2224 int smb2_session_logoff(struct ksmbd_work *work) 2225 { 2226 struct ksmbd_conn *conn = work->conn; 2227 struct ksmbd_session *sess = work->sess; 2228 struct smb2_logoff_req *req; 2229 struct smb2_logoff_rsp *rsp; 2230 u64 sess_id; 2231 int err; 2232 2233 WORK_BUFFERS(work, req, rsp); 2234 2235 ksmbd_debug(SMB, "Received smb2 session logoff request\n"); 2236 2237 ksmbd_conn_lock(conn); 2238 if (!ksmbd_conn_good(conn)) { 2239 ksmbd_conn_unlock(conn); 2240 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2241 smb2_set_err_rsp(work); 2242 return -ENOENT; 2243 } 2244 sess_id = le64_to_cpu(req->hdr.SessionId); 2245 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2246 ksmbd_conn_unlock(conn); 2247 2248 ksmbd_close_session_fds(work); 2249 ksmbd_conn_wait_idle(conn); 2250 2251 if (ksmbd_tree_conn_session_logoff(sess)) { 2252 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2253 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2254 smb2_set_err_rsp(work); 2255 return -ENOENT; 2256 } 2257 2258 down_write(&conn->session_lock); 2259 sess->state = SMB2_SESSION_EXPIRED; 2260 up_write(&conn->session_lock); 2261 2262 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_SETUP); 2263 2264 rsp->StructureSize = cpu_to_le16(4); 2265 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2266 if (err) { 2267 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2268 smb2_set_err_rsp(work); 2269 return err; 2270 } 2271 return 0; 2272 } 2273 2274 /** 2275 * create_smb2_pipe() - create IPC pipe 2276 * @work: smb work containing request buffer 2277 * 2278 * Return: 0 on success, otherwise error 2279 */ 2280 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2281 { 2282 struct smb2_create_rsp *rsp; 2283 struct smb2_create_req *req; 2284 int id; 2285 int err; 2286 char *name; 2287 2288 WORK_BUFFERS(work, req, rsp); 2289 2290 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2291 1, work->conn->local_nls); 2292 if (IS_ERR(name)) { 2293 rsp->hdr.Status = STATUS_NO_MEMORY; 2294 err = PTR_ERR(name); 2295 goto out; 2296 } 2297 2298 id = ksmbd_session_rpc_open(work->sess, name); 2299 if (id < 0) { 2300 pr_err("Unable to open RPC pipe: %d\n", id); 2301 err = id; 2302 goto out; 2303 } 2304 2305 rsp->hdr.Status = STATUS_SUCCESS; 2306 rsp->StructureSize = cpu_to_le16(89); 2307 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2308 rsp->Flags = 0; 2309 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2310 2311 rsp->CreationTime = cpu_to_le64(0); 2312 rsp->LastAccessTime = cpu_to_le64(0); 2313 rsp->ChangeTime = cpu_to_le64(0); 2314 rsp->AllocationSize = cpu_to_le64(0); 2315 rsp->EndofFile = cpu_to_le64(0); 2316 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2317 rsp->Reserved2 = 0; 2318 rsp->VolatileFileId = id; 2319 rsp->PersistentFileId = 0; 2320 rsp->CreateContextsOffset = 0; 2321 rsp->CreateContextsLength = 0; 2322 2323 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2324 if (err) 2325 goto out; 2326 2327 kfree(name); 2328 return 0; 2329 2330 out: 2331 switch (err) { 2332 case -EINVAL: 2333 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2334 break; 2335 case -ENOSPC: 2336 case -ENOMEM: 2337 rsp->hdr.Status = STATUS_NO_MEMORY; 2338 break; 2339 } 2340 2341 if (!IS_ERR(name)) 2342 kfree(name); 2343 2344 smb2_set_err_rsp(work); 2345 return err; 2346 } 2347 2348 /** 2349 * smb2_set_ea() - handler for setting extended attributes using set 2350 * info command 2351 * @eabuf: set info command buffer 2352 * @buf_len: set info command buffer length 2353 * @path: dentry path for get ea 2354 * @get_write: get write access to a mount 2355 * 2356 * Return: 0 on success, otherwise error 2357 */ 2358 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2359 const struct path *path, bool get_write) 2360 { 2361 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2362 char *attr_name = NULL, *value; 2363 int rc = 0; 2364 unsigned int next = 0; 2365 2366 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2367 le16_to_cpu(eabuf->EaValueLength)) 2368 return -EINVAL; 2369 2370 attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP); 2371 if (!attr_name) 2372 return -ENOMEM; 2373 2374 do { 2375 if (!eabuf->EaNameLength) 2376 goto next; 2377 2378 ksmbd_debug(SMB, 2379 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2380 eabuf->name, eabuf->EaNameLength, 2381 le16_to_cpu(eabuf->EaValueLength), 2382 le32_to_cpu(eabuf->NextEntryOffset)); 2383 2384 if (eabuf->EaNameLength > 2385 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2386 rc = -EINVAL; 2387 break; 2388 } 2389 2390 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2391 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2392 eabuf->EaNameLength); 2393 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2394 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2395 2396 if (!eabuf->EaValueLength) { 2397 rc = ksmbd_vfs_casexattr_len(idmap, 2398 path->dentry, 2399 attr_name, 2400 XATTR_USER_PREFIX_LEN + 2401 eabuf->EaNameLength); 2402 2403 /* delete the EA only when it exits */ 2404 if (rc > 0) { 2405 rc = ksmbd_vfs_remove_xattr(idmap, 2406 path, 2407 attr_name, 2408 get_write); 2409 2410 if (rc < 0) { 2411 ksmbd_debug(SMB, 2412 "remove xattr failed(%d)\n", 2413 rc); 2414 break; 2415 } 2416 } 2417 2418 /* if the EA doesn't exist, just do nothing. */ 2419 rc = 0; 2420 } else { 2421 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2422 le16_to_cpu(eabuf->EaValueLength), 2423 0, get_write); 2424 if (rc < 0) { 2425 ksmbd_debug(SMB, 2426 "ksmbd_vfs_setxattr is failed(%d)\n", 2427 rc); 2428 break; 2429 } 2430 } 2431 2432 next: 2433 next = le32_to_cpu(eabuf->NextEntryOffset); 2434 if (next == 0 || buf_len < next) 2435 break; 2436 buf_len -= next; 2437 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2438 if (buf_len < sizeof(struct smb2_ea_info)) { 2439 rc = -EINVAL; 2440 break; 2441 } 2442 2443 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2444 le16_to_cpu(eabuf->EaValueLength)) { 2445 rc = -EINVAL; 2446 break; 2447 } 2448 } while (next != 0); 2449 2450 kfree(attr_name); 2451 return rc; 2452 } 2453 2454 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2455 struct ksmbd_file *fp, 2456 char *stream_name, int s_type) 2457 { 2458 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2459 size_t xattr_stream_size; 2460 char *xattr_stream_name; 2461 int rc; 2462 2463 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2464 &xattr_stream_name, 2465 &xattr_stream_size, 2466 s_type); 2467 if (rc) 2468 return rc; 2469 2470 fp->stream.name = xattr_stream_name; 2471 fp->stream.size = xattr_stream_size; 2472 2473 /* Check if there is stream prefix in xattr space */ 2474 rc = ksmbd_vfs_casexattr_len(idmap, 2475 path->dentry, 2476 xattr_stream_name, 2477 xattr_stream_size); 2478 if (rc >= 0) 2479 return 0; 2480 2481 if (fp->cdoption == FILE_OPEN_LE) { 2482 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2483 return -EBADF; 2484 } 2485 2486 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2487 if (rc < 0) 2488 pr_err("Failed to store XATTR stream name :%d\n", rc); 2489 return 0; 2490 } 2491 2492 static int smb2_remove_smb_xattrs(const struct path *path) 2493 { 2494 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2495 char *name, *xattr_list = NULL; 2496 ssize_t xattr_list_len; 2497 int err = 0; 2498 2499 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2500 if (xattr_list_len < 0) { 2501 goto out; 2502 } else if (!xattr_list_len) { 2503 ksmbd_debug(SMB, "empty xattr in the file\n"); 2504 goto out; 2505 } 2506 2507 for (name = xattr_list; name - xattr_list < xattr_list_len; 2508 name += strlen(name) + 1) { 2509 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2510 2511 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2512 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2513 STREAM_PREFIX_LEN)) { 2514 err = ksmbd_vfs_remove_xattr(idmap, path, 2515 name, true); 2516 if (err) 2517 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2518 name); 2519 } 2520 } 2521 out: 2522 kvfree(xattr_list); 2523 return err; 2524 } 2525 2526 static int smb2_create_truncate(const struct path *path) 2527 { 2528 int rc = vfs_truncate(path, 0); 2529 2530 if (rc) { 2531 pr_err("vfs_truncate failed, rc %d\n", rc); 2532 return rc; 2533 } 2534 2535 rc = smb2_remove_smb_xattrs(path); 2536 if (rc == -EOPNOTSUPP) 2537 rc = 0; 2538 if (rc) 2539 ksmbd_debug(SMB, 2540 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2541 rc); 2542 return rc; 2543 } 2544 2545 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2546 struct ksmbd_file *fp) 2547 { 2548 struct xattr_dos_attrib da = {0}; 2549 int rc; 2550 2551 if (!test_share_config_flag(tcon->share_conf, 2552 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2553 return; 2554 2555 da.version = 4; 2556 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2557 da.itime = da.create_time = fp->create_time; 2558 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2559 XATTR_DOSINFO_ITIME; 2560 2561 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); 2562 if (rc) 2563 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2564 } 2565 2566 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2567 const struct path *path, struct ksmbd_file *fp) 2568 { 2569 struct xattr_dos_attrib da; 2570 int rc; 2571 2572 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2573 2574 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2575 if (!test_share_config_flag(tcon->share_conf, 2576 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2577 return; 2578 2579 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2580 path->dentry, &da); 2581 if (rc > 0) { 2582 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2583 fp->create_time = da.create_time; 2584 fp->itime = da.itime; 2585 } 2586 } 2587 2588 static int smb2_creat(struct ksmbd_work *work, 2589 struct path *path, char *name, int open_flags, 2590 umode_t posix_mode, bool is_dir) 2591 { 2592 struct ksmbd_tree_connect *tcon = work->tcon; 2593 struct ksmbd_share_config *share = tcon->share_conf; 2594 umode_t mode; 2595 int rc; 2596 2597 if (!(open_flags & O_CREAT)) 2598 return -EBADF; 2599 2600 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2601 if (is_dir == true) { 2602 ksmbd_debug(SMB, "creating directory\n"); 2603 2604 mode = share_config_directory_mode(share, posix_mode); 2605 rc = ksmbd_vfs_mkdir(work, name, mode); 2606 if (rc) 2607 return rc; 2608 } else { 2609 ksmbd_debug(SMB, "creating regular file\n"); 2610 2611 mode = share_config_create_mode(share, posix_mode); 2612 rc = ksmbd_vfs_create(work, name, mode); 2613 if (rc) 2614 return rc; 2615 } 2616 2617 rc = ksmbd_vfs_kern_path(work, name, 0, path, 0); 2618 if (rc) { 2619 pr_err("cannot get linux path (%s), err = %d\n", 2620 name, rc); 2621 return rc; 2622 } 2623 return 0; 2624 } 2625 2626 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2627 struct smb2_create_req *req, 2628 const struct path *path) 2629 { 2630 struct create_context *context; 2631 struct create_sd_buf_req *sd_buf; 2632 2633 if (!req->CreateContextsOffset) 2634 return -ENOENT; 2635 2636 /* Parse SD BUFFER create contexts */ 2637 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2638 if (!context) 2639 return -ENOENT; 2640 else if (IS_ERR(context)) 2641 return PTR_ERR(context); 2642 2643 ksmbd_debug(SMB, 2644 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2645 sd_buf = (struct create_sd_buf_req *)context; 2646 if (le16_to_cpu(context->DataOffset) + 2647 le32_to_cpu(context->DataLength) < 2648 sizeof(struct create_sd_buf_req)) 2649 return -EINVAL; 2650 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2651 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2652 } 2653 2654 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2655 struct mnt_idmap *idmap, 2656 struct inode *inode) 2657 { 2658 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2659 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2660 2661 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2662 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2663 fattr->cf_mode = inode->i_mode; 2664 fattr->cf_acls = NULL; 2665 fattr->cf_dacls = NULL; 2666 2667 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2668 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2669 if (S_ISDIR(inode->i_mode)) 2670 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2671 } 2672 } 2673 2674 enum { 2675 DURABLE_RECONN_V2 = 1, 2676 DURABLE_RECONN, 2677 DURABLE_REQ_V2, 2678 DURABLE_REQ, 2679 }; 2680 2681 struct durable_info { 2682 struct ksmbd_file *fp; 2683 unsigned short int type; 2684 bool persistent; 2685 bool reconnected; 2686 unsigned int timeout; 2687 char *CreateGuid; 2688 }; 2689 2690 static int parse_durable_handle_context(struct ksmbd_work *work, 2691 struct smb2_create_req *req, 2692 struct lease_ctx_info *lc, 2693 struct durable_info *dh_info) 2694 { 2695 struct ksmbd_conn *conn = work->conn; 2696 struct create_context *context; 2697 int dh_idx, err = 0; 2698 u64 persistent_id = 0; 2699 int req_op_level; 2700 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; 2701 2702 req_op_level = req->RequestedOplockLevel; 2703 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); 2704 dh_idx++) { 2705 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); 2706 if (IS_ERR(context)) { 2707 err = PTR_ERR(context); 2708 goto out; 2709 } 2710 if (!context) 2711 continue; 2712 2713 switch (dh_idx) { 2714 case DURABLE_RECONN_V2: 2715 { 2716 struct create_durable_handle_reconnect_v2 *recon_v2; 2717 2718 if (dh_info->type == DURABLE_RECONN || 2719 dh_info->type == DURABLE_REQ_V2) { 2720 err = -EINVAL; 2721 goto out; 2722 } 2723 2724 if (le16_to_cpu(context->DataOffset) + 2725 le32_to_cpu(context->DataLength) < 2726 sizeof(struct create_durable_handle_reconnect_v2)) { 2727 err = -EINVAL; 2728 goto out; 2729 } 2730 2731 recon_v2 = (struct create_durable_handle_reconnect_v2 *)context; 2732 persistent_id = recon_v2->dcontext.Fid.PersistentFileId; 2733 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2734 if (!dh_info->fp) { 2735 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2736 err = -EBADF; 2737 goto out; 2738 } 2739 2740 if (memcmp(dh_info->fp->create_guid, recon_v2->dcontext.CreateGuid, 2741 SMB2_CREATE_GUID_SIZE)) { 2742 err = -EBADF; 2743 ksmbd_put_durable_fd(dh_info->fp); 2744 goto out; 2745 } 2746 2747 dh_info->type = dh_idx; 2748 dh_info->reconnected = true; 2749 ksmbd_debug(SMB, 2750 "reconnect v2 Persistent-id from reconnect = %llu\n", 2751 persistent_id); 2752 break; 2753 } 2754 case DURABLE_RECONN: 2755 { 2756 create_durable_reconn_t *recon; 2757 2758 if (dh_info->type == DURABLE_RECONN_V2 || 2759 dh_info->type == DURABLE_REQ_V2) { 2760 err = -EINVAL; 2761 goto out; 2762 } 2763 2764 if (le16_to_cpu(context->DataOffset) + 2765 le32_to_cpu(context->DataLength) < 2766 sizeof(create_durable_reconn_t)) { 2767 err = -EINVAL; 2768 goto out; 2769 } 2770 2771 recon = (create_durable_reconn_t *)context; 2772 persistent_id = recon->Data.Fid.PersistentFileId; 2773 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2774 if (!dh_info->fp) { 2775 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2776 err = -EBADF; 2777 goto out; 2778 } 2779 2780 dh_info->type = dh_idx; 2781 dh_info->reconnected = true; 2782 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", 2783 persistent_id); 2784 break; 2785 } 2786 case DURABLE_REQ_V2: 2787 { 2788 struct create_durable_req_v2 *durable_v2_blob; 2789 2790 if (dh_info->type == DURABLE_RECONN || 2791 dh_info->type == DURABLE_RECONN_V2) { 2792 err = -EINVAL; 2793 goto out; 2794 } 2795 2796 if (le16_to_cpu(context->DataOffset) + 2797 le32_to_cpu(context->DataLength) < 2798 sizeof(struct create_durable_req_v2)) { 2799 err = -EINVAL; 2800 goto out; 2801 } 2802 2803 durable_v2_blob = 2804 (struct create_durable_req_v2 *)context; 2805 ksmbd_debug(SMB, "Request for durable v2 open\n"); 2806 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->dcontext.CreateGuid); 2807 if (dh_info->fp) { 2808 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, 2809 SMB2_CLIENT_GUID_SIZE)) { 2810 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { 2811 err = -ENOEXEC; 2812 goto out; 2813 } 2814 2815 dh_info->fp->conn = conn; 2816 dh_info->reconnected = true; 2817 goto out; 2818 } 2819 } 2820 2821 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2822 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2823 dh_info->CreateGuid = 2824 durable_v2_blob->dcontext.CreateGuid; 2825 dh_info->persistent = 2826 le32_to_cpu(durable_v2_blob->dcontext.Flags); 2827 dh_info->timeout = 2828 le32_to_cpu(durable_v2_blob->dcontext.Timeout); 2829 dh_info->type = dh_idx; 2830 } 2831 break; 2832 } 2833 case DURABLE_REQ: 2834 if (dh_info->type == DURABLE_RECONN) 2835 goto out; 2836 if (dh_info->type == DURABLE_RECONN_V2 || 2837 dh_info->type == DURABLE_REQ_V2) { 2838 err = -EINVAL; 2839 goto out; 2840 } 2841 2842 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2843 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2844 ksmbd_debug(SMB, "Request for durable open\n"); 2845 dh_info->type = dh_idx; 2846 } 2847 } 2848 } 2849 2850 out: 2851 return err; 2852 } 2853 2854 /** 2855 * smb2_open() - handler for smb file open request 2856 * @work: smb work containing request buffer 2857 * 2858 * Return: 0 on success, otherwise error 2859 */ 2860 int smb2_open(struct ksmbd_work *work) 2861 { 2862 struct ksmbd_conn *conn = work->conn; 2863 struct ksmbd_session *sess = work->sess; 2864 struct ksmbd_tree_connect *tcon = work->tcon; 2865 struct smb2_create_req *req; 2866 struct smb2_create_rsp *rsp; 2867 struct path path; 2868 struct ksmbd_share_config *share = tcon->share_conf; 2869 struct ksmbd_file *fp = NULL; 2870 struct file *filp = NULL; 2871 struct mnt_idmap *idmap = NULL; 2872 struct kstat stat; 2873 struct create_context *context; 2874 struct lease_ctx_info *lc = NULL; 2875 struct create_ea_buf_req *ea_buf = NULL; 2876 struct oplock_info *opinfo; 2877 struct durable_info dh_info = {0}; 2878 __le32 *next_ptr = NULL; 2879 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2880 int rc = 0; 2881 int contxt_cnt = 0, query_disk_id = 0; 2882 bool maximal_access_ctxt = false, posix_ctxt = false; 2883 int s_type = 0; 2884 int next_off = 0; 2885 char *name = NULL; 2886 char *stream_name = NULL; 2887 bool file_present = false, created = false, already_permitted = false; 2888 int share_ret, need_truncate = 0; 2889 u64 time; 2890 umode_t posix_mode = 0; 2891 __le32 daccess, maximal_access = 0; 2892 int iov_len = 0; 2893 2894 ksmbd_debug(SMB, "Received smb2 create request\n"); 2895 2896 WORK_BUFFERS(work, req, rsp); 2897 2898 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2899 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2900 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2901 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2902 smb2_set_err_rsp(work); 2903 return -EINVAL; 2904 } 2905 2906 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2907 ksmbd_debug(SMB, "IPC pipe create request\n"); 2908 return create_smb2_pipe(work); 2909 } 2910 2911 if (req->CreateContextsOffset && tcon->posix_extensions) { 2912 context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); 2913 if (IS_ERR(context)) { 2914 rc = PTR_ERR(context); 2915 goto err_out2; 2916 } else if (context) { 2917 struct create_posix *posix = (struct create_posix *)context; 2918 2919 if (le16_to_cpu(context->DataOffset) + 2920 le32_to_cpu(context->DataLength) < 2921 sizeof(struct create_posix) - 4) { 2922 rc = -EINVAL; 2923 goto err_out2; 2924 } 2925 ksmbd_debug(SMB, "get posix context\n"); 2926 2927 posix_mode = le32_to_cpu(posix->Mode); 2928 posix_ctxt = true; 2929 } 2930 } 2931 2932 if (req->NameLength) { 2933 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), 2934 le16_to_cpu(req->NameLength), 2935 work->conn->local_nls); 2936 if (IS_ERR(name)) { 2937 rc = PTR_ERR(name); 2938 name = NULL; 2939 goto err_out2; 2940 } 2941 2942 ksmbd_debug(SMB, "converted name = %s\n", name); 2943 2944 if (posix_ctxt == false) { 2945 if (strchr(name, ':')) { 2946 if (!test_share_config_flag(work->tcon->share_conf, 2947 KSMBD_SHARE_FLAG_STREAMS)) { 2948 rc = -EBADF; 2949 goto err_out2; 2950 } 2951 rc = parse_stream_name(name, &stream_name, &s_type); 2952 if (rc < 0) 2953 goto err_out2; 2954 } 2955 2956 rc = ksmbd_validate_filename(name); 2957 if (rc < 0) 2958 goto err_out2; 2959 } 2960 2961 if (ksmbd_share_veto_filename(share, name)) { 2962 rc = -ENOENT; 2963 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2964 name); 2965 goto err_out2; 2966 } 2967 } else { 2968 name = kstrdup("", KSMBD_DEFAULT_GFP); 2969 if (!name) { 2970 rc = -ENOMEM; 2971 goto err_out2; 2972 } 2973 } 2974 2975 req_op_level = req->RequestedOplockLevel; 2976 2977 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && 2978 req->CreateContextsOffset) { 2979 lc = parse_lease_state(req); 2980 rc = parse_durable_handle_context(work, req, lc, &dh_info); 2981 if (rc) { 2982 ksmbd_debug(SMB, "error parsing durable handle context\n"); 2983 goto err_out2; 2984 } 2985 2986 if (dh_info.reconnected == true) { 2987 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name); 2988 if (rc) { 2989 ksmbd_put_durable_fd(dh_info.fp); 2990 goto err_out2; 2991 } 2992 2993 rc = ksmbd_reopen_durable_fd(work, dh_info.fp); 2994 if (rc) { 2995 ksmbd_put_durable_fd(dh_info.fp); 2996 goto err_out2; 2997 } 2998 2999 if (ksmbd_override_fsids(work)) { 3000 rc = -ENOMEM; 3001 ksmbd_put_durable_fd(dh_info.fp); 3002 goto err_out2; 3003 } 3004 3005 fp = dh_info.fp; 3006 file_info = FILE_OPENED; 3007 3008 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); 3009 if (rc) 3010 goto err_out2; 3011 3012 ksmbd_put_durable_fd(fp); 3013 goto reconnected_fp; 3014 } 3015 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 3016 lc = parse_lease_state(req); 3017 3018 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 3019 pr_err("Invalid impersonationlevel : 0x%x\n", 3020 le32_to_cpu(req->ImpersonationLevel)); 3021 rc = -EIO; 3022 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 3023 goto err_out2; 3024 } 3025 3026 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 3027 pr_err("Invalid create options : 0x%x\n", 3028 le32_to_cpu(req->CreateOptions)); 3029 rc = -EINVAL; 3030 goto err_out2; 3031 } else { 3032 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 3033 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 3034 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 3035 3036 if (req->CreateOptions & 3037 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 3038 FILE_RESERVE_OPFILTER_LE)) { 3039 rc = -EOPNOTSUPP; 3040 goto err_out2; 3041 } 3042 3043 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3044 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 3045 rc = -EINVAL; 3046 goto err_out2; 3047 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 3048 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 3049 } 3050 } 3051 } 3052 3053 if (le32_to_cpu(req->CreateDisposition) > 3054 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 3055 pr_err("Invalid create disposition : 0x%x\n", 3056 le32_to_cpu(req->CreateDisposition)); 3057 rc = -EINVAL; 3058 goto err_out2; 3059 } 3060 3061 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 3062 pr_err("Invalid desired access : 0x%x\n", 3063 le32_to_cpu(req->DesiredAccess)); 3064 rc = -EACCES; 3065 goto err_out2; 3066 } 3067 3068 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 3069 pr_err("Invalid file attribute : 0x%x\n", 3070 le32_to_cpu(req->FileAttributes)); 3071 rc = -EINVAL; 3072 goto err_out2; 3073 } 3074 3075 if (req->CreateContextsOffset) { 3076 /* Parse non-durable handle create contexts */ 3077 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 3078 if (IS_ERR(context)) { 3079 rc = PTR_ERR(context); 3080 goto err_out2; 3081 } else if (context) { 3082 ea_buf = (struct create_ea_buf_req *)context; 3083 if (le16_to_cpu(context->DataOffset) + 3084 le32_to_cpu(context->DataLength) < 3085 sizeof(struct create_ea_buf_req)) { 3086 rc = -EINVAL; 3087 goto err_out2; 3088 } 3089 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 3090 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3091 rc = -EACCES; 3092 goto err_out2; 3093 } 3094 } 3095 3096 context = smb2_find_context_vals(req, 3097 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 3098 if (IS_ERR(context)) { 3099 rc = PTR_ERR(context); 3100 goto err_out2; 3101 } else if (context) { 3102 ksmbd_debug(SMB, 3103 "get query maximal access context\n"); 3104 maximal_access_ctxt = 1; 3105 } 3106 3107 context = smb2_find_context_vals(req, 3108 SMB2_CREATE_TIMEWARP_REQUEST, 4); 3109 if (IS_ERR(context)) { 3110 rc = PTR_ERR(context); 3111 goto err_out2; 3112 } else if (context) { 3113 ksmbd_debug(SMB, "get timewarp context\n"); 3114 rc = -EBADF; 3115 goto err_out2; 3116 } 3117 } 3118 3119 if (ksmbd_override_fsids(work)) { 3120 rc = -ENOMEM; 3121 goto err_out2; 3122 } 3123 3124 rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, 3125 &path, 1); 3126 if (!rc) { 3127 file_present = true; 3128 3129 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 3130 /* 3131 * If file exists with under flags, return access 3132 * denied error. 3133 */ 3134 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 3135 req->CreateDisposition == FILE_OPEN_IF_LE) { 3136 rc = -EACCES; 3137 goto err_out; 3138 } 3139 3140 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3141 ksmbd_debug(SMB, 3142 "User does not have write permission\n"); 3143 rc = -EACCES; 3144 goto err_out; 3145 } 3146 } else if (d_is_symlink(path.dentry)) { 3147 rc = -EACCES; 3148 goto err_out; 3149 } 3150 3151 idmap = mnt_idmap(path.mnt); 3152 } else { 3153 if (rc != -ENOENT) 3154 goto err_out; 3155 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 3156 name, rc); 3157 rc = 0; 3158 } 3159 3160 if (stream_name) { 3161 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3162 if (s_type == DATA_STREAM) { 3163 rc = -EIO; 3164 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3165 } 3166 } else { 3167 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 3168 s_type == DATA_STREAM) { 3169 rc = -EIO; 3170 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3171 } 3172 } 3173 3174 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 3175 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 3176 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3177 rc = -EIO; 3178 } 3179 3180 if (rc < 0) 3181 goto err_out; 3182 } 3183 3184 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 3185 S_ISDIR(d_inode(path.dentry)->i_mode) && 3186 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3187 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 3188 name, req->CreateOptions); 3189 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3190 rc = -EIO; 3191 goto err_out; 3192 } 3193 3194 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 3195 !(req->CreateDisposition == FILE_CREATE_LE) && 3196 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 3197 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3198 rc = -EIO; 3199 goto err_out; 3200 } 3201 3202 if (!stream_name && file_present && 3203 req->CreateDisposition == FILE_CREATE_LE) { 3204 rc = -EEXIST; 3205 goto err_out; 3206 } 3207 3208 daccess = smb_map_generic_desired_access(req->DesiredAccess); 3209 3210 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3211 rc = smb_check_perm_dacl(conn, &path, &daccess, 3212 sess->user->uid); 3213 if (rc) 3214 goto err_out; 3215 } 3216 3217 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 3218 if (!file_present) { 3219 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 3220 } else { 3221 ksmbd_vfs_query_maximal_access(idmap, 3222 path.dentry, 3223 &daccess); 3224 already_permitted = true; 3225 } 3226 maximal_access = daccess; 3227 } 3228 3229 open_flags = smb2_create_open_flags(file_present, daccess, 3230 req->CreateDisposition, 3231 &may_flags, 3232 req->CreateOptions, 3233 file_present ? d_inode(path.dentry)->i_mode : 0); 3234 3235 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3236 if (open_flags & (O_CREAT | O_TRUNC)) { 3237 ksmbd_debug(SMB, 3238 "User does not have write permission\n"); 3239 rc = -EACCES; 3240 goto err_out; 3241 } 3242 } 3243 3244 /*create file if not present */ 3245 if (!file_present) { 3246 rc = smb2_creat(work, &path, name, open_flags, 3247 posix_mode, 3248 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 3249 if (rc) { 3250 if (rc == -ENOENT) { 3251 rc = -EIO; 3252 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 3253 } 3254 goto err_out; 3255 } 3256 3257 created = true; 3258 idmap = mnt_idmap(path.mnt); 3259 if (ea_buf) { 3260 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3261 sizeof(struct smb2_ea_info)) { 3262 rc = -EINVAL; 3263 goto err_out; 3264 } 3265 3266 rc = smb2_set_ea(&ea_buf->ea, 3267 le32_to_cpu(ea_buf->ccontext.DataLength), 3268 &path, false); 3269 if (rc == -EOPNOTSUPP) 3270 rc = 0; 3271 else if (rc) 3272 goto err_out; 3273 } 3274 } else if (!already_permitted) { 3275 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3276 * because execute(search) permission on a parent directory, 3277 * is already granted. 3278 */ 3279 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3280 rc = inode_permission(idmap, 3281 d_inode(path.dentry), 3282 may_flags); 3283 if (rc) 3284 goto err_out; 3285 3286 if ((daccess & FILE_DELETE_LE) || 3287 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3288 rc = inode_permission(idmap, 3289 d_inode(path.dentry->d_parent), 3290 MAY_EXEC | MAY_WRITE); 3291 if (rc) 3292 goto err_out; 3293 } 3294 } 3295 } 3296 3297 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3298 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3299 rc = -EBUSY; 3300 goto err_out; 3301 } 3302 3303 rc = 0; 3304 filp = dentry_open(&path, open_flags, current_cred()); 3305 if (IS_ERR(filp)) { 3306 rc = PTR_ERR(filp); 3307 pr_err("dentry open for dir failed, rc %d\n", rc); 3308 goto err_out; 3309 } 3310 3311 if (file_present) { 3312 if (!(open_flags & O_TRUNC)) 3313 file_info = FILE_OPENED; 3314 else 3315 file_info = FILE_OVERWRITTEN; 3316 3317 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3318 FILE_SUPERSEDE_LE) 3319 file_info = FILE_SUPERSEDED; 3320 } else if (open_flags & O_CREAT) { 3321 file_info = FILE_CREATED; 3322 } 3323 3324 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3325 3326 /* Obtain Volatile-ID */ 3327 fp = ksmbd_open_fd(work, filp); 3328 if (IS_ERR(fp)) { 3329 fput(filp); 3330 rc = PTR_ERR(fp); 3331 fp = NULL; 3332 goto err_out; 3333 } 3334 3335 /* Get Persistent-ID */ 3336 ksmbd_open_durable_fd(fp); 3337 if (!has_file_id(fp->persistent_id)) { 3338 rc = -ENOMEM; 3339 goto err_out; 3340 } 3341 3342 fp->cdoption = req->CreateDisposition; 3343 fp->daccess = daccess; 3344 fp->saccess = req->ShareAccess; 3345 fp->coption = req->CreateOptions; 3346 3347 /* Set default windows and posix acls if creating new file */ 3348 if (created) { 3349 int posix_acl_rc; 3350 struct inode *inode = d_inode(path.dentry); 3351 3352 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3353 &path, 3354 d_inode(path.dentry->d_parent)); 3355 if (posix_acl_rc) 3356 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3357 3358 if (test_share_config_flag(work->tcon->share_conf, 3359 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3360 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3361 sess->user->gid); 3362 } 3363 3364 if (rc) { 3365 rc = smb2_create_sd_buffer(work, req, &path); 3366 if (rc) { 3367 if (posix_acl_rc) 3368 ksmbd_vfs_set_init_posix_acl(idmap, 3369 &path); 3370 3371 if (test_share_config_flag(work->tcon->share_conf, 3372 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3373 struct smb_fattr fattr; 3374 struct smb_ntsd *pntsd; 3375 int pntsd_size, ace_num = 0; 3376 3377 ksmbd_acls_fattr(&fattr, idmap, inode); 3378 if (fattr.cf_acls) 3379 ace_num = fattr.cf_acls->a_count; 3380 if (fattr.cf_dacls) 3381 ace_num += fattr.cf_dacls->a_count; 3382 3383 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3384 sizeof(struct smb_sid) * 3 + 3385 sizeof(struct smb_acl) + 3386 sizeof(struct smb_ace) * ace_num * 2, 3387 KSMBD_DEFAULT_GFP); 3388 if (!pntsd) { 3389 posix_acl_release(fattr.cf_acls); 3390 posix_acl_release(fattr.cf_dacls); 3391 goto err_out; 3392 } 3393 3394 rc = build_sec_desc(idmap, 3395 pntsd, NULL, 0, 3396 OWNER_SECINFO | 3397 GROUP_SECINFO | 3398 DACL_SECINFO, 3399 &pntsd_size, &fattr); 3400 posix_acl_release(fattr.cf_acls); 3401 posix_acl_release(fattr.cf_dacls); 3402 if (rc) { 3403 kfree(pntsd); 3404 goto err_out; 3405 } 3406 3407 rc = ksmbd_vfs_set_sd_xattr(conn, 3408 idmap, 3409 &path, 3410 pntsd, 3411 pntsd_size, 3412 false); 3413 kfree(pntsd); 3414 if (rc) 3415 pr_err("failed to store ntacl in xattr : %d\n", 3416 rc); 3417 } 3418 } 3419 } 3420 rc = 0; 3421 } 3422 3423 if (stream_name) { 3424 rc = smb2_set_stream_name_xattr(&path, 3425 fp, 3426 stream_name, 3427 s_type); 3428 if (rc) 3429 goto err_out; 3430 file_info = FILE_CREATED; 3431 } 3432 3433 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3434 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3435 3436 fp->is_posix_ctxt = posix_ctxt; 3437 3438 /* fp should be searchable through ksmbd_inode.m_fp_list 3439 * after daccess, saccess, attrib_only, and stream are 3440 * initialized. 3441 */ 3442 down_write(&fp->f_ci->m_lock); 3443 list_add(&fp->node, &fp->f_ci->m_fp_list); 3444 up_write(&fp->f_ci->m_lock); 3445 3446 /* Check delete pending among previous fp before oplock break */ 3447 if (ksmbd_inode_pending_delete(fp)) { 3448 rc = -EBUSY; 3449 goto err_out; 3450 } 3451 3452 if (file_present || created) 3453 path_put(&path); 3454 3455 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3456 !fp->attrib_only && !stream_name) { 3457 smb_break_all_oplock(work, fp); 3458 need_truncate = 1; 3459 } 3460 3461 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3462 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3463 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3464 !(conn->vals->req_capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3465 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3466 rc = share_ret; 3467 goto err_out1; 3468 } 3469 } else { 3470 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { 3471 if (S_ISDIR(file_inode(filp)->i_mode)) { 3472 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; 3473 lc->is_dir = true; 3474 } 3475 3476 /* 3477 * Compare parent lease using parent key. If there is no 3478 * a lease that has same parent key, Send lease break 3479 * notification. 3480 */ 3481 smb_send_parent_lease_break_noti(fp, lc); 3482 3483 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3484 ksmbd_debug(SMB, 3485 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3486 name, req_op_level, lc->req_state); 3487 rc = find_same_lease_key(sess, fp->f_ci, lc); 3488 if (rc) 3489 goto err_out1; 3490 } else if (open_flags == O_RDONLY && 3491 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3492 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3493 req_op_level = SMB2_OPLOCK_LEVEL_II; 3494 3495 rc = smb_grant_oplock(work, req_op_level, 3496 fp->persistent_id, fp, 3497 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3498 lc, share_ret); 3499 if (rc < 0) 3500 goto err_out1; 3501 } 3502 3503 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3504 ksmbd_fd_set_delete_on_close(fp, file_info); 3505 3506 if (need_truncate) { 3507 rc = smb2_create_truncate(&fp->filp->f_path); 3508 if (rc) 3509 goto err_out1; 3510 } 3511 3512 if (req->CreateContextsOffset) { 3513 struct create_alloc_size_req *az_req; 3514 3515 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3516 SMB2_CREATE_ALLOCATION_SIZE, 4); 3517 if (IS_ERR(az_req)) { 3518 rc = PTR_ERR(az_req); 3519 goto err_out1; 3520 } else if (az_req) { 3521 loff_t alloc_size; 3522 int err; 3523 3524 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3525 le32_to_cpu(az_req->ccontext.DataLength) < 3526 sizeof(struct create_alloc_size_req)) { 3527 rc = -EINVAL; 3528 goto err_out1; 3529 } 3530 alloc_size = le64_to_cpu(az_req->AllocationSize); 3531 ksmbd_debug(SMB, 3532 "request smb2 create allocate size : %llu\n", 3533 alloc_size); 3534 smb_break_all_levII_oplock(work, fp, 1); 3535 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3536 alloc_size); 3537 if (err < 0) 3538 ksmbd_debug(SMB, 3539 "vfs_fallocate is failed : %d\n", 3540 err); 3541 } 3542 3543 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3544 if (IS_ERR(context)) { 3545 rc = PTR_ERR(context); 3546 goto err_out1; 3547 } else if (context) { 3548 ksmbd_debug(SMB, "get query on disk id context\n"); 3549 query_disk_id = 1; 3550 } 3551 3552 if (conn->is_aapl == false) { 3553 context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); 3554 if (IS_ERR(context)) { 3555 rc = PTR_ERR(context); 3556 goto err_out1; 3557 } else if (context) 3558 conn->is_aapl = true; 3559 } 3560 } 3561 3562 rc = ksmbd_vfs_getattr(&path, &stat); 3563 if (rc) 3564 goto err_out1; 3565 3566 if (stat.result_mask & STATX_BTIME) 3567 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3568 else 3569 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3570 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3571 fp->f_ci->m_fattr = 3572 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3573 3574 if (!created) 3575 smb2_update_xattrs(tcon, &path, fp); 3576 else 3577 smb2_new_xattrs(tcon, &path, fp); 3578 3579 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3580 3581 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { 3582 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && 3583 test_share_config_flag(work->tcon->share_conf, 3584 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 3585 fp->is_persistent = true; 3586 else 3587 fp->is_durable = true; 3588 3589 if (dh_info.type == DURABLE_REQ_V2) { 3590 memcpy(fp->create_guid, dh_info.CreateGuid, 3591 SMB2_CREATE_GUID_SIZE); 3592 if (dh_info.timeout) 3593 fp->durable_timeout = 3594 min_t(unsigned int, dh_info.timeout, 3595 DURABLE_HANDLE_MAX_TIMEOUT); 3596 else 3597 fp->durable_timeout = 60; 3598 } 3599 } 3600 3601 reconnected_fp: 3602 rsp->StructureSize = cpu_to_le16(89); 3603 rcu_read_lock(); 3604 opinfo = rcu_dereference(fp->f_opinfo); 3605 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3606 rcu_read_unlock(); 3607 rsp->Flags = 0; 3608 rsp->CreateAction = cpu_to_le32(file_info); 3609 rsp->CreationTime = cpu_to_le64(fp->create_time); 3610 time = ksmbd_UnixTimeToNT(stat.atime); 3611 rsp->LastAccessTime = cpu_to_le64(time); 3612 time = ksmbd_UnixTimeToNT(stat.mtime); 3613 rsp->LastWriteTime = cpu_to_le64(time); 3614 time = ksmbd_UnixTimeToNT(stat.ctime); 3615 rsp->ChangeTime = cpu_to_le64(time); 3616 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3617 cpu_to_le64(stat.blocks << 9); 3618 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3619 rsp->FileAttributes = fp->f_ci->m_fattr; 3620 3621 rsp->Reserved2 = 0; 3622 3623 rsp->PersistentFileId = fp->persistent_id; 3624 rsp->VolatileFileId = fp->volatile_id; 3625 3626 rsp->CreateContextsOffset = 0; 3627 rsp->CreateContextsLength = 0; 3628 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3629 3630 /* If lease is request send lease context response */ 3631 if (opinfo && opinfo->is_lease) { 3632 struct create_context *lease_ccontext; 3633 3634 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3635 name, opinfo->o_lease->state); 3636 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3637 3638 lease_ccontext = (struct create_context *)rsp->Buffer; 3639 contxt_cnt++; 3640 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3641 le32_add_cpu(&rsp->CreateContextsLength, 3642 conn->vals->create_lease_size); 3643 iov_len += conn->vals->create_lease_size; 3644 next_ptr = &lease_ccontext->Next; 3645 next_off = conn->vals->create_lease_size; 3646 } 3647 3648 if (maximal_access_ctxt) { 3649 struct create_context *mxac_ccontext; 3650 3651 if (maximal_access == 0) 3652 ksmbd_vfs_query_maximal_access(idmap, 3653 path.dentry, 3654 &maximal_access); 3655 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3656 le32_to_cpu(rsp->CreateContextsLength)); 3657 contxt_cnt++; 3658 create_mxac_rsp_buf(rsp->Buffer + 3659 le32_to_cpu(rsp->CreateContextsLength), 3660 le32_to_cpu(maximal_access)); 3661 le32_add_cpu(&rsp->CreateContextsLength, 3662 conn->vals->create_mxac_size); 3663 iov_len += conn->vals->create_mxac_size; 3664 if (next_ptr) 3665 *next_ptr = cpu_to_le32(next_off); 3666 next_ptr = &mxac_ccontext->Next; 3667 next_off = conn->vals->create_mxac_size; 3668 } 3669 3670 if (query_disk_id) { 3671 struct create_context *disk_id_ccontext; 3672 3673 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3674 le32_to_cpu(rsp->CreateContextsLength)); 3675 contxt_cnt++; 3676 create_disk_id_rsp_buf(rsp->Buffer + 3677 le32_to_cpu(rsp->CreateContextsLength), 3678 stat.ino, tcon->id); 3679 le32_add_cpu(&rsp->CreateContextsLength, 3680 conn->vals->create_disk_id_size); 3681 iov_len += conn->vals->create_disk_id_size; 3682 if (next_ptr) 3683 *next_ptr = cpu_to_le32(next_off); 3684 next_ptr = &disk_id_ccontext->Next; 3685 next_off = conn->vals->create_disk_id_size; 3686 } 3687 3688 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { 3689 struct create_context *durable_ccontext; 3690 3691 durable_ccontext = (struct create_context *)(rsp->Buffer + 3692 le32_to_cpu(rsp->CreateContextsLength)); 3693 contxt_cnt++; 3694 if (dh_info.type == DURABLE_REQ) { 3695 create_durable_rsp_buf(rsp->Buffer + 3696 le32_to_cpu(rsp->CreateContextsLength)); 3697 le32_add_cpu(&rsp->CreateContextsLength, 3698 conn->vals->create_durable_size); 3699 iov_len += conn->vals->create_durable_size; 3700 } else { 3701 create_durable_v2_rsp_buf(rsp->Buffer + 3702 le32_to_cpu(rsp->CreateContextsLength), 3703 fp); 3704 le32_add_cpu(&rsp->CreateContextsLength, 3705 conn->vals->create_durable_v2_size); 3706 iov_len += conn->vals->create_durable_v2_size; 3707 } 3708 3709 if (next_ptr) 3710 *next_ptr = cpu_to_le32(next_off); 3711 next_ptr = &durable_ccontext->Next; 3712 next_off = conn->vals->create_durable_size; 3713 } 3714 3715 if (posix_ctxt) { 3716 contxt_cnt++; 3717 create_posix_rsp_buf(rsp->Buffer + 3718 le32_to_cpu(rsp->CreateContextsLength), 3719 fp); 3720 le32_add_cpu(&rsp->CreateContextsLength, 3721 conn->vals->create_posix_size); 3722 iov_len += conn->vals->create_posix_size; 3723 if (next_ptr) 3724 *next_ptr = cpu_to_le32(next_off); 3725 } 3726 3727 if (contxt_cnt > 0) { 3728 rsp->CreateContextsOffset = 3729 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3730 } 3731 3732 err_out: 3733 if (rc && (file_present || created)) 3734 path_put(&path); 3735 3736 err_out1: 3737 ksmbd_revert_fsids(work); 3738 3739 err_out2: 3740 if (!rc) { 3741 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3742 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3743 } 3744 if (rc) { 3745 if (rc == -EINVAL) 3746 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3747 else if (rc == -EOPNOTSUPP) 3748 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3749 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3750 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3751 else if (rc == -ENOENT) 3752 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3753 else if (rc == -EPERM) 3754 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3755 else if (rc == -EBUSY) 3756 rsp->hdr.Status = STATUS_DELETE_PENDING; 3757 else if (rc == -EBADF) 3758 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3759 else if (rc == -ENOEXEC) 3760 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3761 else if (rc == -ENXIO) 3762 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3763 else if (rc == -EEXIST) 3764 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3765 else if (rc == -EMFILE) 3766 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3767 if (!rsp->hdr.Status) 3768 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3769 3770 if (fp) 3771 ksmbd_fd_put(work, fp); 3772 smb2_set_err_rsp(work); 3773 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3774 } 3775 3776 kfree(name); 3777 kfree(lc); 3778 3779 return rc; 3780 } 3781 3782 static int readdir_info_level_struct_sz(int info_level) 3783 { 3784 switch (info_level) { 3785 case FILE_FULL_DIRECTORY_INFORMATION: 3786 return sizeof(FILE_FULL_DIRECTORY_INFO); 3787 case FILE_BOTH_DIRECTORY_INFORMATION: 3788 return sizeof(FILE_BOTH_DIRECTORY_INFO); 3789 case FILE_DIRECTORY_INFORMATION: 3790 return sizeof(FILE_DIRECTORY_INFO); 3791 case FILE_NAMES_INFORMATION: 3792 return sizeof(struct file_names_info); 3793 case FILEID_FULL_DIRECTORY_INFORMATION: 3794 return sizeof(FILE_ID_FULL_DIR_INFO); 3795 case FILEID_BOTH_DIRECTORY_INFORMATION: 3796 return sizeof(struct file_id_both_directory_info); 3797 case SMB_FIND_FILE_POSIX_INFO: 3798 return sizeof(struct smb2_posix_info); 3799 default: 3800 return -EOPNOTSUPP; 3801 } 3802 } 3803 3804 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3805 { 3806 switch (info_level) { 3807 case FILE_FULL_DIRECTORY_INFORMATION: 3808 { 3809 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3810 3811 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->rptr; 3812 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3813 d_info->name = ffdinfo->FileName; 3814 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3815 return 0; 3816 } 3817 case FILE_BOTH_DIRECTORY_INFORMATION: 3818 { 3819 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3820 3821 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->rptr; 3822 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3823 d_info->name = fbdinfo->FileName; 3824 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3825 return 0; 3826 } 3827 case FILE_DIRECTORY_INFORMATION: 3828 { 3829 FILE_DIRECTORY_INFO *fdinfo; 3830 3831 fdinfo = (FILE_DIRECTORY_INFO *)d_info->rptr; 3832 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3833 d_info->name = fdinfo->FileName; 3834 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3835 return 0; 3836 } 3837 case FILE_NAMES_INFORMATION: 3838 { 3839 struct file_names_info *fninfo; 3840 3841 fninfo = (struct file_names_info *)d_info->rptr; 3842 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3843 d_info->name = fninfo->FileName; 3844 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3845 return 0; 3846 } 3847 case FILEID_FULL_DIRECTORY_INFORMATION: 3848 { 3849 FILE_ID_FULL_DIR_INFO *dinfo; 3850 3851 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->rptr; 3852 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3853 d_info->name = dinfo->FileName; 3854 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3855 return 0; 3856 } 3857 case FILEID_BOTH_DIRECTORY_INFORMATION: 3858 { 3859 struct file_id_both_directory_info *fibdinfo; 3860 3861 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3862 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3863 d_info->name = fibdinfo->FileName; 3864 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3865 return 0; 3866 } 3867 case SMB_FIND_FILE_POSIX_INFO: 3868 { 3869 struct smb2_posix_info *posix_info; 3870 3871 posix_info = (struct smb2_posix_info *)d_info->rptr; 3872 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3873 d_info->name = posix_info->name; 3874 d_info->name_len = le32_to_cpu(posix_info->name_len); 3875 return 0; 3876 } 3877 default: 3878 return -EINVAL; 3879 } 3880 } 3881 3882 /** 3883 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3884 * buffer 3885 * @conn: connection instance 3886 * @info_level: smb information level 3887 * @d_info: structure included variables for query dir 3888 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3889 * 3890 * if directory has many entries, find first can't read it fully. 3891 * find next might be called multiple times to read remaining dir entries 3892 * 3893 * Return: 0 on success, otherwise error 3894 */ 3895 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3896 struct ksmbd_dir_info *d_info, 3897 struct ksmbd_kstat *ksmbd_kstat) 3898 { 3899 int next_entry_offset = 0; 3900 char *conv_name; 3901 int conv_len; 3902 void *kstat; 3903 int struct_sz, rc = 0; 3904 3905 conv_name = ksmbd_convert_dir_info_name(d_info, 3906 conn->local_nls, 3907 &conv_len); 3908 if (!conv_name) 3909 return -ENOMEM; 3910 3911 /* Somehow the name has only terminating NULL bytes */ 3912 if (conv_len < 0) { 3913 rc = -EINVAL; 3914 goto free_conv_name; 3915 } 3916 3917 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3918 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3919 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3920 3921 if (next_entry_offset > d_info->out_buf_len) { 3922 d_info->out_buf_len = 0; 3923 rc = -ENOSPC; 3924 goto free_conv_name; 3925 } 3926 3927 kstat = d_info->wptr; 3928 if (info_level != FILE_NAMES_INFORMATION) 3929 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3930 3931 switch (info_level) { 3932 case FILE_FULL_DIRECTORY_INFORMATION: 3933 { 3934 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3935 3936 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)kstat; 3937 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3938 ffdinfo->EaSize = 3939 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3940 if (ffdinfo->EaSize) 3941 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3942 if (d_info->hide_dot_file && d_info->name[0] == '.') 3943 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3944 memcpy(ffdinfo->FileName, conv_name, conv_len); 3945 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3946 break; 3947 } 3948 case FILE_BOTH_DIRECTORY_INFORMATION: 3949 { 3950 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3951 3952 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)kstat; 3953 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3954 fbdinfo->EaSize = 3955 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3956 if (fbdinfo->EaSize) 3957 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3958 fbdinfo->ShortNameLength = 0; 3959 fbdinfo->Reserved = 0; 3960 if (d_info->hide_dot_file && d_info->name[0] == '.') 3961 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3962 memcpy(fbdinfo->FileName, conv_name, conv_len); 3963 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3964 break; 3965 } 3966 case FILE_DIRECTORY_INFORMATION: 3967 { 3968 FILE_DIRECTORY_INFO *fdinfo; 3969 3970 fdinfo = (FILE_DIRECTORY_INFO *)kstat; 3971 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3972 if (d_info->hide_dot_file && d_info->name[0] == '.') 3973 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3974 memcpy(fdinfo->FileName, conv_name, conv_len); 3975 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3976 break; 3977 } 3978 case FILE_NAMES_INFORMATION: 3979 { 3980 struct file_names_info *fninfo; 3981 3982 fninfo = (struct file_names_info *)kstat; 3983 fninfo->FileNameLength = cpu_to_le32(conv_len); 3984 memcpy(fninfo->FileName, conv_name, conv_len); 3985 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3986 break; 3987 } 3988 case FILEID_FULL_DIRECTORY_INFORMATION: 3989 { 3990 FILE_ID_FULL_DIR_INFO *dinfo; 3991 3992 dinfo = (FILE_ID_FULL_DIR_INFO *)kstat; 3993 dinfo->FileNameLength = cpu_to_le32(conv_len); 3994 dinfo->EaSize = 3995 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3996 if (dinfo->EaSize) 3997 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3998 dinfo->Reserved = 0; 3999 if (conn->is_aapl) 4000 dinfo->UniqueId = 0; 4001 else 4002 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4003 if (d_info->hide_dot_file && d_info->name[0] == '.') 4004 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4005 memcpy(dinfo->FileName, conv_name, conv_len); 4006 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4007 break; 4008 } 4009 case FILEID_BOTH_DIRECTORY_INFORMATION: 4010 { 4011 struct file_id_both_directory_info *fibdinfo; 4012 4013 fibdinfo = (struct file_id_both_directory_info *)kstat; 4014 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 4015 fibdinfo->EaSize = 4016 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4017 if (fibdinfo->EaSize) 4018 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4019 if (conn->is_aapl) 4020 fibdinfo->UniqueId = 0; 4021 else 4022 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4023 fibdinfo->ShortNameLength = 0; 4024 fibdinfo->Reserved = 0; 4025 fibdinfo->Reserved2 = cpu_to_le16(0); 4026 if (d_info->hide_dot_file && d_info->name[0] == '.') 4027 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4028 memcpy(fibdinfo->FileName, conv_name, conv_len); 4029 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4030 break; 4031 } 4032 case SMB_FIND_FILE_POSIX_INFO: 4033 { 4034 struct smb2_posix_info *posix_info; 4035 u64 time; 4036 4037 posix_info = (struct smb2_posix_info *)kstat; 4038 posix_info->Ignored = 0; 4039 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 4040 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 4041 posix_info->ChangeTime = cpu_to_le64(time); 4042 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 4043 posix_info->LastAccessTime = cpu_to_le64(time); 4044 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 4045 posix_info->LastWriteTime = cpu_to_le64(time); 4046 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 4047 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 4048 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 4049 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 4050 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 4051 switch (ksmbd_kstat->kstat->mode & S_IFMT) { 4052 case S_IFDIR: 4053 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 4054 break; 4055 case S_IFLNK: 4056 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 4057 break; 4058 case S_IFCHR: 4059 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 4060 break; 4061 case S_IFBLK: 4062 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 4063 break; 4064 case S_IFIFO: 4065 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 4066 break; 4067 case S_IFSOCK: 4068 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 4069 } 4070 4071 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 4072 posix_info->DosAttributes = 4073 S_ISDIR(ksmbd_kstat->kstat->mode) ? 4074 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 4075 if (d_info->hide_dot_file && d_info->name[0] == '.') 4076 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4077 /* 4078 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4079 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4080 * sub_auth(4 * 1(num_subauth)) + RID(4). 4081 */ 4082 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 4083 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 4084 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 4085 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 4086 memcpy(posix_info->name, conv_name, conv_len); 4087 posix_info->name_len = cpu_to_le32(conv_len); 4088 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 4089 break; 4090 } 4091 4092 } /* switch (info_level) */ 4093 4094 d_info->last_entry_offset = d_info->data_count; 4095 d_info->data_count += next_entry_offset; 4096 d_info->out_buf_len -= next_entry_offset; 4097 d_info->wptr += next_entry_offset; 4098 4099 ksmbd_debug(SMB, 4100 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 4101 info_level, d_info->out_buf_len, 4102 next_entry_offset, d_info->data_count); 4103 4104 free_conv_name: 4105 kfree(conv_name); 4106 return rc; 4107 } 4108 4109 struct smb2_query_dir_private { 4110 struct ksmbd_work *work; 4111 char *search_pattern; 4112 struct ksmbd_file *dir_fp; 4113 4114 struct ksmbd_dir_info *d_info; 4115 int info_level; 4116 }; 4117 4118 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 4119 { 4120 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 4121 struct kstat kstat; 4122 struct ksmbd_kstat ksmbd_kstat; 4123 int rc; 4124 int i; 4125 4126 for (i = 0; i < priv->d_info->num_entry; i++) { 4127 struct dentry *dent; 4128 4129 if (dentry_name(priv->d_info, priv->info_level)) 4130 return -EINVAL; 4131 4132 dent = lookup_one_unlocked(idmap, 4133 &QSTR_LEN(priv->d_info->name, 4134 priv->d_info->name_len), 4135 priv->dir_fp->filp->f_path.dentry); 4136 4137 if (IS_ERR(dent)) { 4138 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 4139 priv->d_info->name, 4140 PTR_ERR(dent)); 4141 continue; 4142 } 4143 if (unlikely(d_is_negative(dent))) { 4144 dput(dent); 4145 ksmbd_debug(SMB, "Negative dentry `%s'\n", 4146 priv->d_info->name); 4147 continue; 4148 } 4149 4150 ksmbd_kstat.kstat = &kstat; 4151 if (priv->info_level != FILE_NAMES_INFORMATION) { 4152 rc = ksmbd_vfs_fill_dentry_attrs(priv->work, 4153 idmap, 4154 dent, 4155 &ksmbd_kstat); 4156 if (rc) { 4157 dput(dent); 4158 continue; 4159 } 4160 } 4161 4162 rc = smb2_populate_readdir_entry(priv->work->conn, 4163 priv->info_level, 4164 priv->d_info, 4165 &ksmbd_kstat); 4166 dput(dent); 4167 if (rc) 4168 return rc; 4169 } 4170 return 0; 4171 } 4172 4173 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 4174 int info_level) 4175 { 4176 int struct_sz; 4177 int conv_len; 4178 int next_entry_offset; 4179 4180 struct_sz = readdir_info_level_struct_sz(info_level); 4181 if (struct_sz == -EOPNOTSUPP) 4182 return -EOPNOTSUPP; 4183 4184 conv_len = (d_info->name_len + 1) * 2; 4185 next_entry_offset = ALIGN(struct_sz + conv_len, 4186 KSMBD_DIR_INFO_ALIGNMENT); 4187 4188 if (next_entry_offset > d_info->out_buf_len) { 4189 d_info->out_buf_len = 0; 4190 return -ENOSPC; 4191 } 4192 4193 switch (info_level) { 4194 case FILE_FULL_DIRECTORY_INFORMATION: 4195 { 4196 FILE_FULL_DIRECTORY_INFO *ffdinfo; 4197 4198 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->wptr; 4199 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 4200 ffdinfo->FileName[d_info->name_len] = 0x00; 4201 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4202 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4203 break; 4204 } 4205 case FILE_BOTH_DIRECTORY_INFORMATION: 4206 { 4207 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 4208 4209 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->wptr; 4210 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 4211 fbdinfo->FileName[d_info->name_len] = 0x00; 4212 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4213 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4214 break; 4215 } 4216 case FILE_DIRECTORY_INFORMATION: 4217 { 4218 FILE_DIRECTORY_INFO *fdinfo; 4219 4220 fdinfo = (FILE_DIRECTORY_INFO *)d_info->wptr; 4221 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 4222 fdinfo->FileName[d_info->name_len] = 0x00; 4223 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4224 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4225 break; 4226 } 4227 case FILE_NAMES_INFORMATION: 4228 { 4229 struct file_names_info *fninfo; 4230 4231 fninfo = (struct file_names_info *)d_info->wptr; 4232 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 4233 fninfo->FileName[d_info->name_len] = 0x00; 4234 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 4235 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4236 break; 4237 } 4238 case FILEID_FULL_DIRECTORY_INFORMATION: 4239 { 4240 FILE_ID_FULL_DIR_INFO *dinfo; 4241 4242 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->wptr; 4243 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 4244 dinfo->FileName[d_info->name_len] = 0x00; 4245 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4246 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4247 break; 4248 } 4249 case FILEID_BOTH_DIRECTORY_INFORMATION: 4250 { 4251 struct file_id_both_directory_info *fibdinfo; 4252 4253 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 4254 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 4255 fibdinfo->FileName[d_info->name_len] = 0x00; 4256 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4257 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4258 break; 4259 } 4260 case SMB_FIND_FILE_POSIX_INFO: 4261 { 4262 struct smb2_posix_info *posix_info; 4263 4264 posix_info = (struct smb2_posix_info *)d_info->wptr; 4265 memcpy(posix_info->name, d_info->name, d_info->name_len); 4266 posix_info->name[d_info->name_len] = 0x00; 4267 posix_info->name_len = cpu_to_le32(d_info->name_len); 4268 posix_info->NextEntryOffset = 4269 cpu_to_le32(next_entry_offset); 4270 break; 4271 } 4272 } /* switch (info_level) */ 4273 4274 d_info->num_entry++; 4275 d_info->out_buf_len -= next_entry_offset; 4276 d_info->wptr += next_entry_offset; 4277 return 0; 4278 } 4279 4280 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 4281 loff_t offset, u64 ino, unsigned int d_type) 4282 { 4283 struct ksmbd_readdir_data *buf; 4284 struct smb2_query_dir_private *priv; 4285 struct ksmbd_dir_info *d_info; 4286 int rc; 4287 4288 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 4289 priv = buf->private; 4290 d_info = priv->d_info; 4291 4292 /* dot and dotdot entries are already reserved */ 4293 if (!strcmp(".", name) || !strcmp("..", name)) 4294 return true; 4295 d_info->num_scan++; 4296 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 4297 return true; 4298 if (!match_pattern(name, namlen, priv->search_pattern)) 4299 return true; 4300 4301 d_info->name = name; 4302 d_info->name_len = namlen; 4303 rc = reserve_populate_dentry(d_info, priv->info_level); 4304 if (rc) 4305 return false; 4306 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 4307 d_info->out_buf_len = 0; 4308 return true; 4309 } 4310 4311 static int verify_info_level(int info_level) 4312 { 4313 switch (info_level) { 4314 case FILE_FULL_DIRECTORY_INFORMATION: 4315 case FILE_BOTH_DIRECTORY_INFORMATION: 4316 case FILE_DIRECTORY_INFORMATION: 4317 case FILE_NAMES_INFORMATION: 4318 case FILEID_FULL_DIRECTORY_INFORMATION: 4319 case FILEID_BOTH_DIRECTORY_INFORMATION: 4320 case SMB_FIND_FILE_POSIX_INFO: 4321 break; 4322 default: 4323 return -EOPNOTSUPP; 4324 } 4325 4326 return 0; 4327 } 4328 4329 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4330 { 4331 int free_len; 4332 4333 free_len = (int)(work->response_sz - 4334 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4335 return free_len; 4336 } 4337 4338 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4339 unsigned short hdr2_len, 4340 unsigned int out_buf_len) 4341 { 4342 int free_len; 4343 4344 if (out_buf_len > work->conn->vals->max_trans_size) 4345 return -EINVAL; 4346 4347 free_len = smb2_resp_buf_len(work, hdr2_len); 4348 if (free_len < 0) 4349 return -EINVAL; 4350 4351 return min_t(int, out_buf_len, free_len); 4352 } 4353 4354 int smb2_query_dir(struct ksmbd_work *work) 4355 { 4356 struct ksmbd_conn *conn = work->conn; 4357 struct smb2_query_directory_req *req; 4358 struct smb2_query_directory_rsp *rsp; 4359 struct ksmbd_share_config *share = work->tcon->share_conf; 4360 struct ksmbd_file *dir_fp = NULL; 4361 struct ksmbd_dir_info d_info; 4362 int rc = 0; 4363 char *srch_ptr = NULL; 4364 unsigned char srch_flag; 4365 int buffer_sz; 4366 struct smb2_query_dir_private query_dir_private = {NULL, }; 4367 4368 ksmbd_debug(SMB, "Received smb2 query directory request\n"); 4369 4370 WORK_BUFFERS(work, req, rsp); 4371 4372 if (ksmbd_override_fsids(work)) { 4373 rsp->hdr.Status = STATUS_NO_MEMORY; 4374 smb2_set_err_rsp(work); 4375 return -ENOMEM; 4376 } 4377 4378 rc = verify_info_level(req->FileInformationClass); 4379 if (rc) { 4380 rc = -EFAULT; 4381 goto err_out2; 4382 } 4383 4384 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4385 if (!dir_fp) { 4386 rc = -EBADF; 4387 goto err_out2; 4388 } 4389 4390 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4391 inode_permission(file_mnt_idmap(dir_fp->filp), 4392 file_inode(dir_fp->filp), 4393 MAY_READ | MAY_EXEC)) { 4394 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4395 rc = -EACCES; 4396 goto err_out2; 4397 } 4398 4399 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4400 pr_err("can't do query dir for a file\n"); 4401 rc = -EINVAL; 4402 goto err_out2; 4403 } 4404 4405 srch_flag = req->Flags; 4406 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), 4407 le16_to_cpu(req->FileNameLength), 1, 4408 conn->local_nls); 4409 if (IS_ERR(srch_ptr)) { 4410 ksmbd_debug(SMB, "Search Pattern not found\n"); 4411 rc = -EINVAL; 4412 goto err_out2; 4413 } else { 4414 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4415 } 4416 4417 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4418 ksmbd_debug(SMB, "Restart directory scan\n"); 4419 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4420 } 4421 4422 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4423 d_info.wptr = (char *)rsp->Buffer; 4424 d_info.rptr = (char *)rsp->Buffer; 4425 d_info.out_buf_len = 4426 smb2_calc_max_out_buf_len(work, 8, 4427 le32_to_cpu(req->OutputBufferLength)); 4428 if (d_info.out_buf_len < 0) { 4429 rc = -EINVAL; 4430 goto err_out; 4431 } 4432 d_info.flags = srch_flag; 4433 4434 /* 4435 * reserve dot and dotdot entries in head of buffer 4436 * in first response 4437 */ 4438 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4439 dir_fp, &d_info, srch_ptr, 4440 smb2_populate_readdir_entry); 4441 if (rc == -ENOSPC) 4442 rc = 0; 4443 else if (rc) 4444 goto err_out; 4445 4446 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4447 d_info.hide_dot_file = true; 4448 4449 buffer_sz = d_info.out_buf_len; 4450 d_info.rptr = d_info.wptr; 4451 query_dir_private.work = work; 4452 query_dir_private.search_pattern = srch_ptr; 4453 query_dir_private.dir_fp = dir_fp; 4454 query_dir_private.d_info = &d_info; 4455 query_dir_private.info_level = req->FileInformationClass; 4456 dir_fp->readdir_data.private = &query_dir_private; 4457 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4458 again: 4459 d_info.num_scan = 0; 4460 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4461 /* 4462 * num_entry can be 0 if the directory iteration stops before reaching 4463 * the end of the directory and no file is matched with the search 4464 * pattern. 4465 */ 4466 if (rc >= 0 && !d_info.num_entry && d_info.num_scan && 4467 d_info.out_buf_len > 0) 4468 goto again; 4469 /* 4470 * req->OutputBufferLength is too small to contain even one entry. 4471 * In this case, it immediately returns OutputBufferLength 0 to client. 4472 */ 4473 if (!d_info.out_buf_len && !d_info.num_entry) 4474 goto no_buf_len; 4475 if (rc > 0 || rc == -ENOSPC) 4476 rc = 0; 4477 else if (rc) 4478 goto err_out; 4479 4480 d_info.wptr = d_info.rptr; 4481 d_info.out_buf_len = buffer_sz; 4482 rc = process_query_dir_entries(&query_dir_private); 4483 if (rc) 4484 goto err_out; 4485 4486 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4487 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4488 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4489 } else { 4490 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4491 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4492 } 4493 rsp->StructureSize = cpu_to_le16(9); 4494 rsp->OutputBufferOffset = cpu_to_le16(0); 4495 rsp->OutputBufferLength = cpu_to_le32(0); 4496 rsp->Buffer[0] = 0; 4497 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4498 offsetof(struct smb2_query_directory_rsp, Buffer) 4499 + 1); 4500 if (rc) 4501 goto err_out; 4502 } else { 4503 no_buf_len: 4504 ((FILE_DIRECTORY_INFO *) 4505 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4506 ->NextEntryOffset = 0; 4507 if (d_info.data_count >= d_info.last_entry_off_align) 4508 d_info.data_count -= d_info.last_entry_off_align; 4509 4510 rsp->StructureSize = cpu_to_le16(9); 4511 rsp->OutputBufferOffset = cpu_to_le16(72); 4512 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4513 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4514 offsetof(struct smb2_query_directory_rsp, Buffer) + 4515 d_info.data_count); 4516 if (rc) 4517 goto err_out; 4518 } 4519 4520 kfree(srch_ptr); 4521 ksmbd_fd_put(work, dir_fp); 4522 ksmbd_revert_fsids(work); 4523 return 0; 4524 4525 err_out: 4526 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4527 kfree(srch_ptr); 4528 4529 err_out2: 4530 if (rc == -EINVAL) 4531 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4532 else if (rc == -EACCES) 4533 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4534 else if (rc == -ENOENT) 4535 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4536 else if (rc == -EBADF) 4537 rsp->hdr.Status = STATUS_FILE_CLOSED; 4538 else if (rc == -ENOMEM) 4539 rsp->hdr.Status = STATUS_NO_MEMORY; 4540 else if (rc == -EFAULT) 4541 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4542 else if (rc == -EIO) 4543 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4544 if (!rsp->hdr.Status) 4545 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4546 4547 smb2_set_err_rsp(work); 4548 ksmbd_fd_put(work, dir_fp); 4549 ksmbd_revert_fsids(work); 4550 return rc; 4551 } 4552 4553 /** 4554 * buffer_check_err() - helper function to check buffer errors 4555 * @reqOutputBufferLength: max buffer length expected in command response 4556 * @rsp: query info response buffer contains output buffer length 4557 * @rsp_org: base response buffer pointer in case of chained response 4558 * 4559 * Return: 0 on success, otherwise error 4560 */ 4561 static int buffer_check_err(int reqOutputBufferLength, 4562 struct smb2_query_info_rsp *rsp, 4563 void *rsp_org) 4564 { 4565 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4566 pr_err("Invalid Buffer Size Requested\n"); 4567 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4568 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4569 return -EINVAL; 4570 } 4571 return 0; 4572 } 4573 4574 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4575 void *rsp_org) 4576 { 4577 struct smb2_file_standard_info *sinfo; 4578 4579 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4580 4581 sinfo->AllocationSize = cpu_to_le64(4096); 4582 sinfo->EndOfFile = cpu_to_le64(0); 4583 sinfo->NumberOfLinks = cpu_to_le32(1); 4584 sinfo->DeletePending = 1; 4585 sinfo->Directory = 0; 4586 rsp->OutputBufferLength = 4587 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4588 } 4589 4590 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4591 void *rsp_org) 4592 { 4593 struct smb2_file_internal_info *file_info; 4594 4595 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4596 4597 /* any unique number */ 4598 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4599 rsp->OutputBufferLength = 4600 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4601 } 4602 4603 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4604 struct smb2_query_info_req *req, 4605 struct smb2_query_info_rsp *rsp, 4606 void *rsp_org) 4607 { 4608 u64 id; 4609 int rc; 4610 4611 /* 4612 * Windows can sometime send query file info request on 4613 * pipe without opening it, checking error condition here 4614 */ 4615 id = req->VolatileFileId; 4616 4617 lockdep_assert_not_held(&sess->rpc_lock); 4618 4619 down_read(&sess->rpc_lock); 4620 if (!ksmbd_session_rpc_method(sess, id)) { 4621 up_read(&sess->rpc_lock); 4622 return -ENOENT; 4623 } 4624 up_read(&sess->rpc_lock); 4625 4626 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4627 req->FileInfoClass, req->VolatileFileId); 4628 4629 switch (req->FileInfoClass) { 4630 case FILE_STANDARD_INFORMATION: 4631 get_standard_info_pipe(rsp, rsp_org); 4632 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4633 rsp, rsp_org); 4634 break; 4635 case FILE_INTERNAL_INFORMATION: 4636 get_internal_info_pipe(rsp, id, rsp_org); 4637 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4638 rsp, rsp_org); 4639 break; 4640 default: 4641 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4642 req->FileInfoClass); 4643 rc = -EOPNOTSUPP; 4644 } 4645 return rc; 4646 } 4647 4648 /** 4649 * smb2_get_ea() - handler for smb2 get extended attribute command 4650 * @work: smb work containing query info command buffer 4651 * @fp: ksmbd_file pointer 4652 * @req: get extended attribute request 4653 * @rsp: response buffer pointer 4654 * @rsp_org: base response buffer pointer in case of chained response 4655 * 4656 * Return: 0 on success, otherwise error 4657 */ 4658 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4659 struct smb2_query_info_req *req, 4660 struct smb2_query_info_rsp *rsp, void *rsp_org) 4661 { 4662 struct smb2_ea_info *eainfo, *prev_eainfo; 4663 char *name, *ptr, *xattr_list = NULL, *buf; 4664 int rc, name_len, value_len, xattr_list_len, idx; 4665 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4666 struct smb2_ea_info_req *ea_req = NULL; 4667 const struct path *path; 4668 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4669 4670 if (!(fp->daccess & FILE_READ_EA_LE)) { 4671 pr_err("Not permitted to read ext attr : 0x%x\n", 4672 fp->daccess); 4673 return -EACCES; 4674 } 4675 4676 path = &fp->filp->f_path; 4677 /* single EA entry is requested with given user.* name */ 4678 if (req->InputBufferLength) { 4679 if (le32_to_cpu(req->InputBufferLength) <= 4680 sizeof(struct smb2_ea_info_req)) 4681 return -EINVAL; 4682 4683 ea_req = (struct smb2_ea_info_req *)((char *)req + 4684 le16_to_cpu(req->InputBufferOffset)); 4685 } else { 4686 /* need to send all EAs, if no specific EA is requested*/ 4687 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4688 ksmbd_debug(SMB, 4689 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4690 le32_to_cpu(req->Flags)); 4691 } 4692 4693 buf_free_len = 4694 smb2_calc_max_out_buf_len(work, 8, 4695 le32_to_cpu(req->OutputBufferLength)); 4696 if (buf_free_len < 0) 4697 return -EINVAL; 4698 4699 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4700 if (rc < 0) { 4701 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4702 goto out; 4703 } else if (!rc) { /* there is no EA in the file */ 4704 ksmbd_debug(SMB, "no ea data in the file\n"); 4705 goto done; 4706 } 4707 xattr_list_len = rc; 4708 4709 ptr = (char *)rsp->Buffer; 4710 eainfo = (struct smb2_ea_info *)ptr; 4711 prev_eainfo = eainfo; 4712 idx = 0; 4713 4714 while (idx < xattr_list_len) { 4715 name = xattr_list + idx; 4716 name_len = strlen(name); 4717 4718 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4719 idx += name_len + 1; 4720 4721 /* 4722 * CIFS does not support EA other than user.* namespace, 4723 * still keep the framework generic, to list other attrs 4724 * in future. 4725 */ 4726 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4727 continue; 4728 4729 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4730 STREAM_PREFIX_LEN)) 4731 continue; 4732 4733 if (req->InputBufferLength && 4734 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4735 ea_req->EaNameLength)) 4736 continue; 4737 4738 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4739 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4740 continue; 4741 4742 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4743 name_len -= XATTR_USER_PREFIX_LEN; 4744 4745 ptr = eainfo->name + name_len + 1; 4746 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4747 name_len + 1); 4748 /* bailout if xattr can't fit in buf_free_len */ 4749 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4750 name, &buf); 4751 if (value_len <= 0) { 4752 rc = -ENOENT; 4753 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4754 goto out; 4755 } 4756 4757 buf_free_len -= value_len; 4758 if (buf_free_len < 0) { 4759 kfree(buf); 4760 break; 4761 } 4762 4763 memcpy(ptr, buf, value_len); 4764 kfree(buf); 4765 4766 ptr += value_len; 4767 eainfo->Flags = 0; 4768 eainfo->EaNameLength = name_len; 4769 4770 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4771 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4772 name_len); 4773 else 4774 memcpy(eainfo->name, name, name_len); 4775 4776 eainfo->name[name_len] = '\0'; 4777 eainfo->EaValueLength = cpu_to_le16(value_len); 4778 next_offset = offsetof(struct smb2_ea_info, name) + 4779 name_len + 1 + value_len; 4780 4781 /* align next xattr entry at 4 byte bundary */ 4782 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4783 if (alignment_bytes) { 4784 memset(ptr, '\0', alignment_bytes); 4785 ptr += alignment_bytes; 4786 next_offset += alignment_bytes; 4787 buf_free_len -= alignment_bytes; 4788 } 4789 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4790 prev_eainfo = eainfo; 4791 eainfo = (struct smb2_ea_info *)ptr; 4792 rsp_data_cnt += next_offset; 4793 4794 if (req->InputBufferLength) { 4795 ksmbd_debug(SMB, "single entry requested\n"); 4796 break; 4797 } 4798 } 4799 4800 /* no more ea entries */ 4801 prev_eainfo->NextEntryOffset = 0; 4802 done: 4803 rc = 0; 4804 if (rsp_data_cnt == 0) 4805 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4806 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4807 out: 4808 kvfree(xattr_list); 4809 return rc; 4810 } 4811 4812 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4813 struct ksmbd_file *fp, void *rsp_org) 4814 { 4815 struct smb2_file_access_info *file_info; 4816 4817 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4818 file_info->AccessFlags = fp->daccess; 4819 rsp->OutputBufferLength = 4820 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4821 } 4822 4823 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4824 struct ksmbd_file *fp, void *rsp_org) 4825 { 4826 struct smb2_file_basic_info *basic_info; 4827 struct kstat stat; 4828 u64 time; 4829 int ret; 4830 4831 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4832 pr_err("no right to read the attributes : 0x%x\n", 4833 fp->daccess); 4834 return -EACCES; 4835 } 4836 4837 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4838 AT_STATX_SYNC_AS_STAT); 4839 if (ret) 4840 return ret; 4841 4842 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4843 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4844 time = ksmbd_UnixTimeToNT(stat.atime); 4845 basic_info->LastAccessTime = cpu_to_le64(time); 4846 time = ksmbd_UnixTimeToNT(stat.mtime); 4847 basic_info->LastWriteTime = cpu_to_le64(time); 4848 time = ksmbd_UnixTimeToNT(stat.ctime); 4849 basic_info->ChangeTime = cpu_to_le64(time); 4850 basic_info->Attributes = fp->f_ci->m_fattr; 4851 basic_info->Pad1 = 0; 4852 rsp->OutputBufferLength = 4853 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4854 return 0; 4855 } 4856 4857 static int get_file_standard_info(struct smb2_query_info_rsp *rsp, 4858 struct ksmbd_file *fp, void *rsp_org) 4859 { 4860 struct smb2_file_standard_info *sinfo; 4861 unsigned int delete_pending; 4862 struct kstat stat; 4863 int ret; 4864 4865 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4866 AT_STATX_SYNC_AS_STAT); 4867 if (ret) 4868 return ret; 4869 4870 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4871 delete_pending = ksmbd_inode_pending_delete(fp); 4872 4873 if (ksmbd_stream_fd(fp) == false) { 4874 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); 4875 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4876 } else { 4877 sinfo->AllocationSize = cpu_to_le64(fp->stream.size); 4878 sinfo->EndOfFile = cpu_to_le64(fp->stream.size); 4879 } 4880 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4881 sinfo->DeletePending = delete_pending; 4882 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4883 rsp->OutputBufferLength = 4884 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4885 4886 return 0; 4887 } 4888 4889 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4890 void *rsp_org) 4891 { 4892 struct smb2_file_alignment_info *file_info; 4893 4894 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4895 file_info->AlignmentRequirement = 0; 4896 rsp->OutputBufferLength = 4897 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4898 } 4899 4900 static int get_file_all_info(struct ksmbd_work *work, 4901 struct smb2_query_info_rsp *rsp, 4902 struct ksmbd_file *fp, 4903 void *rsp_org) 4904 { 4905 struct ksmbd_conn *conn = work->conn; 4906 struct smb2_file_all_info *file_info; 4907 unsigned int delete_pending; 4908 struct kstat stat; 4909 int conv_len; 4910 char *filename; 4911 u64 time; 4912 int ret; 4913 4914 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4915 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4916 fp->daccess); 4917 return -EACCES; 4918 } 4919 4920 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4921 if (IS_ERR(filename)) 4922 return PTR_ERR(filename); 4923 4924 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4925 AT_STATX_SYNC_AS_STAT); 4926 if (ret) 4927 return ret; 4928 4929 ksmbd_debug(SMB, "filename = %s\n", filename); 4930 delete_pending = ksmbd_inode_pending_delete(fp); 4931 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4932 4933 file_info->CreationTime = cpu_to_le64(fp->create_time); 4934 time = ksmbd_UnixTimeToNT(stat.atime); 4935 file_info->LastAccessTime = cpu_to_le64(time); 4936 time = ksmbd_UnixTimeToNT(stat.mtime); 4937 file_info->LastWriteTime = cpu_to_le64(time); 4938 time = ksmbd_UnixTimeToNT(stat.ctime); 4939 file_info->ChangeTime = cpu_to_le64(time); 4940 file_info->Attributes = fp->f_ci->m_fattr; 4941 file_info->Pad1 = 0; 4942 if (ksmbd_stream_fd(fp) == false) { 4943 file_info->AllocationSize = 4944 cpu_to_le64(stat.blocks << 9); 4945 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4946 } else { 4947 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 4948 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 4949 } 4950 file_info->NumberOfLinks = 4951 cpu_to_le32(get_nlink(&stat) - delete_pending); 4952 file_info->DeletePending = delete_pending; 4953 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4954 file_info->Pad2 = 0; 4955 file_info->IndexNumber = cpu_to_le64(stat.ino); 4956 file_info->EASize = 0; 4957 file_info->AccessFlags = fp->daccess; 4958 if (ksmbd_stream_fd(fp) == false) 4959 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4960 else 4961 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 4962 file_info->Mode = fp->coption; 4963 file_info->AlignmentRequirement = 0; 4964 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4965 PATH_MAX, conn->local_nls, 0); 4966 conv_len *= 2; 4967 file_info->FileNameLength = cpu_to_le32(conv_len); 4968 rsp->OutputBufferLength = 4969 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4970 kfree(filename); 4971 return 0; 4972 } 4973 4974 static void get_file_alternate_info(struct ksmbd_work *work, 4975 struct smb2_query_info_rsp *rsp, 4976 struct ksmbd_file *fp, 4977 void *rsp_org) 4978 { 4979 struct ksmbd_conn *conn = work->conn; 4980 struct smb2_file_alt_name_info *file_info; 4981 struct dentry *dentry = fp->filp->f_path.dentry; 4982 int conv_len; 4983 4984 spin_lock(&dentry->d_lock); 4985 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 4986 conv_len = ksmbd_extract_shortname(conn, 4987 dentry->d_name.name, 4988 file_info->FileName); 4989 spin_unlock(&dentry->d_lock); 4990 file_info->FileNameLength = cpu_to_le32(conv_len); 4991 rsp->OutputBufferLength = 4992 cpu_to_le32(struct_size(file_info, FileName, conv_len)); 4993 } 4994 4995 static int get_file_stream_info(struct ksmbd_work *work, 4996 struct smb2_query_info_rsp *rsp, 4997 struct ksmbd_file *fp, 4998 void *rsp_org) 4999 { 5000 struct ksmbd_conn *conn = work->conn; 5001 struct smb2_file_stream_info *file_info; 5002 char *stream_name, *xattr_list = NULL, *stream_buf; 5003 struct kstat stat; 5004 const struct path *path = &fp->filp->f_path; 5005 ssize_t xattr_list_len; 5006 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 5007 int buf_free_len; 5008 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 5009 int ret; 5010 5011 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5012 AT_STATX_SYNC_AS_STAT); 5013 if (ret) 5014 return ret; 5015 5016 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 5017 5018 buf_free_len = 5019 smb2_calc_max_out_buf_len(work, 8, 5020 le32_to_cpu(req->OutputBufferLength)); 5021 if (buf_free_len < 0) 5022 goto out; 5023 5024 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 5025 if (xattr_list_len < 0) { 5026 goto out; 5027 } else if (!xattr_list_len) { 5028 ksmbd_debug(SMB, "empty xattr in the file\n"); 5029 goto out; 5030 } 5031 5032 while (idx < xattr_list_len) { 5033 stream_name = xattr_list + idx; 5034 streamlen = strlen(stream_name); 5035 idx += streamlen + 1; 5036 5037 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 5038 5039 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 5040 STREAM_PREFIX, STREAM_PREFIX_LEN)) 5041 continue; 5042 5043 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 5044 STREAM_PREFIX_LEN); 5045 streamlen = stream_name_len; 5046 5047 /* plus : size */ 5048 streamlen += 1; 5049 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP); 5050 if (!stream_buf) 5051 break; 5052 5053 streamlen = snprintf(stream_buf, streamlen + 1, 5054 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 5055 5056 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 5057 if (next > buf_free_len) { 5058 kfree(stream_buf); 5059 break; 5060 } 5061 5062 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 5063 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5064 stream_buf, streamlen, 5065 conn->local_nls, 0); 5066 streamlen *= 2; 5067 kfree(stream_buf); 5068 file_info->StreamNameLength = cpu_to_le32(streamlen); 5069 file_info->StreamSize = cpu_to_le64(stream_name_len); 5070 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 5071 5072 nbytes += next; 5073 buf_free_len -= next; 5074 file_info->NextEntryOffset = cpu_to_le32(next); 5075 } 5076 5077 out: 5078 if (!S_ISDIR(stat.mode) && 5079 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 5080 file_info = (struct smb2_file_stream_info *) 5081 &rsp->Buffer[nbytes]; 5082 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5083 "::$DATA", 7, conn->local_nls, 0); 5084 streamlen *= 2; 5085 file_info->StreamNameLength = cpu_to_le32(streamlen); 5086 file_info->StreamSize = cpu_to_le64(stat.size); 5087 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 5088 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 5089 } 5090 5091 /* last entry offset should be 0 */ 5092 file_info->NextEntryOffset = 0; 5093 kvfree(xattr_list); 5094 5095 rsp->OutputBufferLength = cpu_to_le32(nbytes); 5096 5097 return 0; 5098 } 5099 5100 static int get_file_internal_info(struct smb2_query_info_rsp *rsp, 5101 struct ksmbd_file *fp, void *rsp_org) 5102 { 5103 struct smb2_file_internal_info *file_info; 5104 struct kstat stat; 5105 int ret; 5106 5107 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5108 AT_STATX_SYNC_AS_STAT); 5109 if (ret) 5110 return ret; 5111 5112 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 5113 file_info->IndexNumber = cpu_to_le64(stat.ino); 5114 rsp->OutputBufferLength = 5115 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 5116 5117 return 0; 5118 } 5119 5120 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 5121 struct ksmbd_file *fp, void *rsp_org) 5122 { 5123 struct smb2_file_network_open_info *file_info; 5124 struct kstat stat; 5125 u64 time; 5126 int ret; 5127 5128 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5129 pr_err("no right to read the attributes : 0x%x\n", 5130 fp->daccess); 5131 return -EACCES; 5132 } 5133 5134 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5135 AT_STATX_SYNC_AS_STAT); 5136 if (ret) 5137 return ret; 5138 5139 file_info = (struct smb2_file_network_open_info *)rsp->Buffer; 5140 5141 file_info->CreationTime = cpu_to_le64(fp->create_time); 5142 time = ksmbd_UnixTimeToNT(stat.atime); 5143 file_info->LastAccessTime = cpu_to_le64(time); 5144 time = ksmbd_UnixTimeToNT(stat.mtime); 5145 file_info->LastWriteTime = cpu_to_le64(time); 5146 time = ksmbd_UnixTimeToNT(stat.ctime); 5147 file_info->ChangeTime = cpu_to_le64(time); 5148 file_info->Attributes = fp->f_ci->m_fattr; 5149 if (ksmbd_stream_fd(fp) == false) { 5150 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5151 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5152 } else { 5153 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5154 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5155 } 5156 file_info->Reserved = cpu_to_le32(0); 5157 rsp->OutputBufferLength = 5158 cpu_to_le32(sizeof(struct smb2_file_network_open_info)); 5159 return 0; 5160 } 5161 5162 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 5163 { 5164 struct smb2_file_ea_info *file_info; 5165 5166 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 5167 file_info->EASize = 0; 5168 rsp->OutputBufferLength = 5169 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 5170 } 5171 5172 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 5173 struct ksmbd_file *fp, void *rsp_org) 5174 { 5175 struct smb2_file_pos_info *file_info; 5176 5177 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 5178 if (ksmbd_stream_fd(fp) == false) 5179 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5180 else 5181 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5182 5183 rsp->OutputBufferLength = 5184 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 5185 } 5186 5187 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 5188 struct ksmbd_file *fp, void *rsp_org) 5189 { 5190 struct smb2_file_mode_info *file_info; 5191 5192 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 5193 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 5194 rsp->OutputBufferLength = 5195 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 5196 } 5197 5198 static int get_file_compression_info(struct smb2_query_info_rsp *rsp, 5199 struct ksmbd_file *fp, void *rsp_org) 5200 { 5201 struct smb2_file_comp_info *file_info; 5202 struct kstat stat; 5203 int ret; 5204 5205 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5206 AT_STATX_SYNC_AS_STAT); 5207 if (ret) 5208 return ret; 5209 5210 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 5211 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 5212 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 5213 file_info->CompressionUnitShift = 0; 5214 file_info->ChunkShift = 0; 5215 file_info->ClusterShift = 0; 5216 memset(&file_info->Reserved[0], 0, 3); 5217 5218 rsp->OutputBufferLength = 5219 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 5220 5221 return 0; 5222 } 5223 5224 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 5225 struct ksmbd_file *fp, void *rsp_org) 5226 { 5227 struct smb2_file_attr_tag_info *file_info; 5228 5229 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5230 pr_err("no right to read the attributes : 0x%x\n", 5231 fp->daccess); 5232 return -EACCES; 5233 } 5234 5235 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 5236 file_info->FileAttributes = fp->f_ci->m_fattr; 5237 file_info->ReparseTag = 0; 5238 rsp->OutputBufferLength = 5239 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 5240 return 0; 5241 } 5242 5243 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 5244 struct ksmbd_file *fp, void *rsp_org) 5245 { 5246 struct smb311_posix_qinfo *file_info; 5247 struct inode *inode = file_inode(fp->filp); 5248 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 5249 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 5250 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 5251 struct kstat stat; 5252 u64 time; 5253 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 5254 int ret; 5255 5256 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5257 AT_STATX_SYNC_AS_STAT); 5258 if (ret) 5259 return ret; 5260 5261 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 5262 file_info->CreationTime = cpu_to_le64(fp->create_time); 5263 time = ksmbd_UnixTimeToNT(stat.atime); 5264 file_info->LastAccessTime = cpu_to_le64(time); 5265 time = ksmbd_UnixTimeToNT(stat.mtime); 5266 file_info->LastWriteTime = cpu_to_le64(time); 5267 time = ksmbd_UnixTimeToNT(stat.ctime); 5268 file_info->ChangeTime = cpu_to_le64(time); 5269 file_info->DosAttributes = fp->f_ci->m_fattr; 5270 file_info->Inode = cpu_to_le64(stat.ino); 5271 if (ksmbd_stream_fd(fp) == false) { 5272 file_info->EndOfFile = cpu_to_le64(stat.size); 5273 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5274 } else { 5275 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5276 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5277 } 5278 file_info->HardLinks = cpu_to_le32(stat.nlink); 5279 file_info->Mode = cpu_to_le32(stat.mode & 0777); 5280 switch (stat.mode & S_IFMT) { 5281 case S_IFDIR: 5282 file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 5283 break; 5284 case S_IFLNK: 5285 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 5286 break; 5287 case S_IFCHR: 5288 file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 5289 break; 5290 case S_IFBLK: 5291 file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 5292 break; 5293 case S_IFIFO: 5294 file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 5295 break; 5296 case S_IFSOCK: 5297 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 5298 } 5299 5300 file_info->DeviceId = cpu_to_le32(stat.rdev); 5301 5302 /* 5303 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 5304 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 5305 * sub_auth(4 * 1(num_subauth)) + RID(4). 5306 */ 5307 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 5308 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 5309 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 5310 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 5311 5312 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 5313 5314 return 0; 5315 } 5316 5317 static int smb2_get_info_file(struct ksmbd_work *work, 5318 struct smb2_query_info_req *req, 5319 struct smb2_query_info_rsp *rsp) 5320 { 5321 struct ksmbd_file *fp; 5322 int fileinfoclass = 0; 5323 int rc = 0; 5324 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5325 5326 if (test_share_config_flag(work->tcon->share_conf, 5327 KSMBD_SHARE_FLAG_PIPE)) { 5328 /* smb2 info file called for pipe */ 5329 return smb2_get_info_file_pipe(work->sess, req, rsp, 5330 work->response_buf); 5331 } 5332 5333 if (work->next_smb2_rcv_hdr_off) { 5334 if (!has_file_id(req->VolatileFileId)) { 5335 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5336 work->compound_fid); 5337 id = work->compound_fid; 5338 pid = work->compound_pfid; 5339 } 5340 } 5341 5342 if (!has_file_id(id)) { 5343 id = req->VolatileFileId; 5344 pid = req->PersistentFileId; 5345 } 5346 5347 fp = ksmbd_lookup_fd_slow(work, id, pid); 5348 if (!fp) 5349 return -ENOENT; 5350 5351 fileinfoclass = req->FileInfoClass; 5352 5353 switch (fileinfoclass) { 5354 case FILE_ACCESS_INFORMATION: 5355 get_file_access_info(rsp, fp, work->response_buf); 5356 break; 5357 5358 case FILE_BASIC_INFORMATION: 5359 rc = get_file_basic_info(rsp, fp, work->response_buf); 5360 break; 5361 5362 case FILE_STANDARD_INFORMATION: 5363 rc = get_file_standard_info(rsp, fp, work->response_buf); 5364 break; 5365 5366 case FILE_ALIGNMENT_INFORMATION: 5367 get_file_alignment_info(rsp, work->response_buf); 5368 break; 5369 5370 case FILE_ALL_INFORMATION: 5371 rc = get_file_all_info(work, rsp, fp, work->response_buf); 5372 break; 5373 5374 case FILE_ALTERNATE_NAME_INFORMATION: 5375 get_file_alternate_info(work, rsp, fp, work->response_buf); 5376 break; 5377 5378 case FILE_STREAM_INFORMATION: 5379 rc = get_file_stream_info(work, rsp, fp, work->response_buf); 5380 break; 5381 5382 case FILE_INTERNAL_INFORMATION: 5383 rc = get_file_internal_info(rsp, fp, work->response_buf); 5384 break; 5385 5386 case FILE_NETWORK_OPEN_INFORMATION: 5387 rc = get_file_network_open_info(rsp, fp, work->response_buf); 5388 break; 5389 5390 case FILE_EA_INFORMATION: 5391 get_file_ea_info(rsp, work->response_buf); 5392 break; 5393 5394 case FILE_FULL_EA_INFORMATION: 5395 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 5396 break; 5397 5398 case FILE_POSITION_INFORMATION: 5399 get_file_position_info(rsp, fp, work->response_buf); 5400 break; 5401 5402 case FILE_MODE_INFORMATION: 5403 get_file_mode_info(rsp, fp, work->response_buf); 5404 break; 5405 5406 case FILE_COMPRESSION_INFORMATION: 5407 rc = get_file_compression_info(rsp, fp, work->response_buf); 5408 break; 5409 5410 case FILE_ATTRIBUTE_TAG_INFORMATION: 5411 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 5412 break; 5413 case SMB_FIND_FILE_POSIX_INFO: 5414 if (!work->tcon->posix_extensions) { 5415 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5416 rc = -EOPNOTSUPP; 5417 } else { 5418 rc = find_file_posix_info(rsp, fp, work->response_buf); 5419 } 5420 break; 5421 default: 5422 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 5423 fileinfoclass); 5424 rc = -EOPNOTSUPP; 5425 } 5426 if (!rc) 5427 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5428 rsp, work->response_buf); 5429 ksmbd_fd_put(work, fp); 5430 return rc; 5431 } 5432 5433 static int smb2_get_info_filesystem(struct ksmbd_work *work, 5434 struct smb2_query_info_req *req, 5435 struct smb2_query_info_rsp *rsp) 5436 { 5437 struct ksmbd_session *sess = work->sess; 5438 struct ksmbd_conn *conn = work->conn; 5439 struct ksmbd_share_config *share = work->tcon->share_conf; 5440 int fsinfoclass = 0; 5441 struct kstatfs stfs; 5442 struct path path; 5443 int rc = 0, len; 5444 5445 if (!share->path) 5446 return -EIO; 5447 5448 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5449 if (rc) { 5450 pr_err("cannot create vfs path\n"); 5451 return -EIO; 5452 } 5453 5454 rc = vfs_statfs(&path, &stfs); 5455 if (rc) { 5456 pr_err("cannot do stat of path %s\n", share->path); 5457 path_put(&path); 5458 return -EIO; 5459 } 5460 5461 fsinfoclass = req->FileInfoClass; 5462 5463 switch (fsinfoclass) { 5464 case FS_DEVICE_INFORMATION: 5465 { 5466 FILE_SYSTEM_DEVICE_INFO *info; 5467 5468 info = (FILE_SYSTEM_DEVICE_INFO *)rsp->Buffer; 5469 5470 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); 5471 info->DeviceCharacteristics = 5472 cpu_to_le32(FILE_DEVICE_IS_MOUNTED); 5473 if (!test_tree_conn_flag(work->tcon, 5474 KSMBD_TREE_CONN_FLAG_WRITABLE)) 5475 info->DeviceCharacteristics |= 5476 cpu_to_le32(FILE_READ_ONLY_DEVICE); 5477 rsp->OutputBufferLength = cpu_to_le32(8); 5478 break; 5479 } 5480 case FS_ATTRIBUTE_INFORMATION: 5481 { 5482 FILE_SYSTEM_ATTRIBUTE_INFO *info; 5483 size_t sz; 5484 5485 info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer; 5486 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5487 FILE_PERSISTENT_ACLS | 5488 FILE_UNICODE_ON_DISK | 5489 FILE_CASE_PRESERVED_NAMES | 5490 FILE_CASE_SENSITIVE_SEARCH | 5491 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5492 5493 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5494 5495 if (test_share_config_flag(work->tcon->share_conf, 5496 KSMBD_SHARE_FLAG_STREAMS)) 5497 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5498 5499 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5500 /* 5501 * some application(potableapp) can not run on ksmbd share 5502 * because only NTFS handle security setting on windows. 5503 * So Although local fs(EXT4 or F2fs, etc) is not NTFS, 5504 * ksmbd should show share as NTFS. Later, If needed, we can add 5505 * fs type(s) parameter to change fs type user wanted. 5506 */ 5507 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5508 "NTFS", PATH_MAX, conn->local_nls, 0); 5509 len = len * 2; 5510 info->FileSystemNameLen = cpu_to_le32(len); 5511 sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len; 5512 rsp->OutputBufferLength = cpu_to_le32(sz); 5513 break; 5514 } 5515 case FS_VOLUME_INFORMATION: 5516 { 5517 struct filesystem_vol_info *info; 5518 size_t sz; 5519 unsigned int serial_crc = 0; 5520 5521 info = (struct filesystem_vol_info *)(rsp->Buffer); 5522 info->VolumeCreationTime = 0; 5523 serial_crc = crc32_le(serial_crc, share->name, 5524 strlen(share->name)); 5525 serial_crc = crc32_le(serial_crc, share->path, 5526 strlen(share->path)); 5527 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5528 strlen(ksmbd_netbios_name())); 5529 /* Taking dummy value of serial number*/ 5530 info->SerialNumber = cpu_to_le32(serial_crc); 5531 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5532 share->name, PATH_MAX, 5533 conn->local_nls, 0); 5534 len = len * 2; 5535 info->VolumeLabelSize = cpu_to_le32(len); 5536 info->Reserved = 0; 5537 sz = sizeof(struct filesystem_vol_info) + len; 5538 rsp->OutputBufferLength = cpu_to_le32(sz); 5539 break; 5540 } 5541 case FS_SIZE_INFORMATION: 5542 { 5543 FILE_SYSTEM_SIZE_INFO *info; 5544 5545 info = (FILE_SYSTEM_SIZE_INFO *)(rsp->Buffer); 5546 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5547 info->AvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); 5548 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5549 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5550 rsp->OutputBufferLength = cpu_to_le32(24); 5551 break; 5552 } 5553 case FS_FULL_SIZE_INFORMATION: 5554 { 5555 struct smb2_fs_full_size_info *info; 5556 5557 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5558 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5559 info->CallerAvailableAllocationUnits = 5560 cpu_to_le64(stfs.f_bavail); 5561 info->ActualAvailableAllocationUnits = 5562 cpu_to_le64(stfs.f_bfree); 5563 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5564 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5565 rsp->OutputBufferLength = cpu_to_le32(32); 5566 break; 5567 } 5568 case FS_OBJECT_ID_INFORMATION: 5569 { 5570 struct object_id_info *info; 5571 5572 info = (struct object_id_info *)(rsp->Buffer); 5573 5574 if (!user_guest(sess->user)) 5575 memcpy(info->objid, user_passkey(sess->user), 16); 5576 else 5577 memset(info->objid, 0, 16); 5578 5579 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5580 info->extended_info.version = cpu_to_le32(1); 5581 info->extended_info.release = cpu_to_le32(1); 5582 info->extended_info.rel_date = 0; 5583 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5584 rsp->OutputBufferLength = cpu_to_le32(64); 5585 break; 5586 } 5587 case FS_SECTOR_SIZE_INFORMATION: 5588 { 5589 struct smb3_fs_ss_info *info; 5590 unsigned int sector_size = 5591 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5592 5593 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5594 5595 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5596 info->PhysicalBytesPerSectorForAtomicity = 5597 cpu_to_le32(sector_size); 5598 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5599 info->FSEffPhysicalBytesPerSectorForAtomicity = 5600 cpu_to_le32(sector_size); 5601 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5602 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5603 info->ByteOffsetForSectorAlignment = 0; 5604 info->ByteOffsetForPartitionAlignment = 0; 5605 rsp->OutputBufferLength = cpu_to_le32(28); 5606 break; 5607 } 5608 case FS_CONTROL_INFORMATION: 5609 { 5610 /* 5611 * TODO : The current implementation is based on 5612 * test result with win7(NTFS) server. It's need to 5613 * modify this to get valid Quota values 5614 * from Linux kernel 5615 */ 5616 struct smb2_fs_control_info *info; 5617 5618 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5619 info->FreeSpaceStartFiltering = 0; 5620 info->FreeSpaceThreshold = 0; 5621 info->FreeSpaceStopFiltering = 0; 5622 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5623 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5624 info->Padding = 0; 5625 rsp->OutputBufferLength = cpu_to_le32(48); 5626 break; 5627 } 5628 case FS_POSIX_INFORMATION: 5629 { 5630 FILE_SYSTEM_POSIX_INFO *info; 5631 5632 if (!work->tcon->posix_extensions) { 5633 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5634 path_put(&path); 5635 return -EOPNOTSUPP; 5636 } else { 5637 info = (FILE_SYSTEM_POSIX_INFO *)(rsp->Buffer); 5638 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5639 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5640 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5641 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5642 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5643 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5644 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5645 rsp->OutputBufferLength = cpu_to_le32(56); 5646 } 5647 break; 5648 } 5649 default: 5650 path_put(&path); 5651 return -EOPNOTSUPP; 5652 } 5653 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5654 rsp, work->response_buf); 5655 path_put(&path); 5656 return rc; 5657 } 5658 5659 static int smb2_get_info_sec(struct ksmbd_work *work, 5660 struct smb2_query_info_req *req, 5661 struct smb2_query_info_rsp *rsp) 5662 { 5663 struct ksmbd_file *fp; 5664 struct mnt_idmap *idmap; 5665 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5666 struct smb_fattr fattr = {{0}}; 5667 struct inode *inode; 5668 __u32 secdesclen = 0; 5669 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5670 int addition_info = le32_to_cpu(req->AdditionalInformation); 5671 int rc = 0, ppntsd_size = 0; 5672 5673 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5674 PROTECTED_DACL_SECINFO | 5675 UNPROTECTED_DACL_SECINFO)) { 5676 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5677 addition_info); 5678 5679 pntsd->revision = cpu_to_le16(1); 5680 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5681 pntsd->osidoffset = 0; 5682 pntsd->gsidoffset = 0; 5683 pntsd->sacloffset = 0; 5684 pntsd->dacloffset = 0; 5685 5686 secdesclen = sizeof(struct smb_ntsd); 5687 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5688 5689 return 0; 5690 } 5691 5692 if (work->next_smb2_rcv_hdr_off) { 5693 if (!has_file_id(req->VolatileFileId)) { 5694 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5695 work->compound_fid); 5696 id = work->compound_fid; 5697 pid = work->compound_pfid; 5698 } 5699 } 5700 5701 if (!has_file_id(id)) { 5702 id = req->VolatileFileId; 5703 pid = req->PersistentFileId; 5704 } 5705 5706 fp = ksmbd_lookup_fd_slow(work, id, pid); 5707 if (!fp) 5708 return -ENOENT; 5709 5710 idmap = file_mnt_idmap(fp->filp); 5711 inode = file_inode(fp->filp); 5712 ksmbd_acls_fattr(&fattr, idmap, inode); 5713 5714 if (test_share_config_flag(work->tcon->share_conf, 5715 KSMBD_SHARE_FLAG_ACL_XATTR)) 5716 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5717 fp->filp->f_path.dentry, 5718 &ppntsd); 5719 5720 /* Check if sd buffer size exceeds response buffer size */ 5721 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5722 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5723 addition_info, &secdesclen, &fattr); 5724 posix_acl_release(fattr.cf_acls); 5725 posix_acl_release(fattr.cf_dacls); 5726 kfree(ppntsd); 5727 ksmbd_fd_put(work, fp); 5728 if (rc) 5729 return rc; 5730 5731 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5732 return 0; 5733 } 5734 5735 /** 5736 * smb2_query_info() - handler for smb2 query info command 5737 * @work: smb work containing query info request buffer 5738 * 5739 * Return: 0 on success, otherwise error 5740 */ 5741 int smb2_query_info(struct ksmbd_work *work) 5742 { 5743 struct smb2_query_info_req *req; 5744 struct smb2_query_info_rsp *rsp; 5745 int rc = 0; 5746 5747 ksmbd_debug(SMB, "Received request smb2 query info request\n"); 5748 5749 WORK_BUFFERS(work, req, rsp); 5750 5751 if (ksmbd_override_fsids(work)) { 5752 rc = -ENOMEM; 5753 goto err_out; 5754 } 5755 5756 switch (req->InfoType) { 5757 case SMB2_O_INFO_FILE: 5758 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5759 rc = smb2_get_info_file(work, req, rsp); 5760 break; 5761 case SMB2_O_INFO_FILESYSTEM: 5762 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5763 rc = smb2_get_info_filesystem(work, req, rsp); 5764 break; 5765 case SMB2_O_INFO_SECURITY: 5766 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5767 rc = smb2_get_info_sec(work, req, rsp); 5768 break; 5769 default: 5770 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5771 req->InfoType); 5772 rc = -EOPNOTSUPP; 5773 } 5774 ksmbd_revert_fsids(work); 5775 5776 if (!rc) { 5777 rsp->StructureSize = cpu_to_le16(9); 5778 rsp->OutputBufferOffset = cpu_to_le16(72); 5779 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5780 offsetof(struct smb2_query_info_rsp, Buffer) + 5781 le32_to_cpu(rsp->OutputBufferLength)); 5782 } 5783 5784 err_out: 5785 if (rc < 0) { 5786 if (rc == -EACCES) 5787 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5788 else if (rc == -ENOENT) 5789 rsp->hdr.Status = STATUS_FILE_CLOSED; 5790 else if (rc == -EIO) 5791 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5792 else if (rc == -ENOMEM) 5793 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5794 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5795 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5796 smb2_set_err_rsp(work); 5797 5798 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5799 rc); 5800 return rc; 5801 } 5802 return 0; 5803 } 5804 5805 /** 5806 * smb2_close_pipe() - handler for closing IPC pipe 5807 * @work: smb work containing close request buffer 5808 * 5809 * Return: 0 5810 */ 5811 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5812 { 5813 u64 id; 5814 struct smb2_close_req *req; 5815 struct smb2_close_rsp *rsp; 5816 5817 WORK_BUFFERS(work, req, rsp); 5818 5819 id = req->VolatileFileId; 5820 ksmbd_session_rpc_close(work->sess, id); 5821 5822 rsp->StructureSize = cpu_to_le16(60); 5823 rsp->Flags = 0; 5824 rsp->Reserved = 0; 5825 rsp->CreationTime = 0; 5826 rsp->LastAccessTime = 0; 5827 rsp->LastWriteTime = 0; 5828 rsp->ChangeTime = 0; 5829 rsp->AllocationSize = 0; 5830 rsp->EndOfFile = 0; 5831 rsp->Attributes = 0; 5832 5833 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5834 sizeof(struct smb2_close_rsp)); 5835 } 5836 5837 /** 5838 * smb2_close() - handler for smb2 close file command 5839 * @work: smb work containing close request buffer 5840 * 5841 * Return: 0 on success, otherwise error 5842 */ 5843 int smb2_close(struct ksmbd_work *work) 5844 { 5845 u64 volatile_id = KSMBD_NO_FID; 5846 u64 sess_id; 5847 struct smb2_close_req *req; 5848 struct smb2_close_rsp *rsp; 5849 struct ksmbd_conn *conn = work->conn; 5850 struct ksmbd_file *fp; 5851 u64 time; 5852 int err = 0; 5853 5854 ksmbd_debug(SMB, "Received smb2 close request\n"); 5855 5856 WORK_BUFFERS(work, req, rsp); 5857 5858 if (test_share_config_flag(work->tcon->share_conf, 5859 KSMBD_SHARE_FLAG_PIPE)) { 5860 ksmbd_debug(SMB, "IPC pipe close request\n"); 5861 return smb2_close_pipe(work); 5862 } 5863 5864 sess_id = le64_to_cpu(req->hdr.SessionId); 5865 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5866 sess_id = work->compound_sid; 5867 5868 work->compound_sid = 0; 5869 if (check_session_id(conn, sess_id)) { 5870 work->compound_sid = sess_id; 5871 } else { 5872 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5873 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5874 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5875 err = -EBADF; 5876 goto out; 5877 } 5878 5879 if (work->next_smb2_rcv_hdr_off && 5880 !has_file_id(req->VolatileFileId)) { 5881 if (!has_file_id(work->compound_fid)) { 5882 /* file already closed, return FILE_CLOSED */ 5883 ksmbd_debug(SMB, "file already closed\n"); 5884 rsp->hdr.Status = STATUS_FILE_CLOSED; 5885 err = -EBADF; 5886 goto out; 5887 } else { 5888 ksmbd_debug(SMB, 5889 "Compound request set FID = %llu:%llu\n", 5890 work->compound_fid, 5891 work->compound_pfid); 5892 volatile_id = work->compound_fid; 5893 5894 /* file closed, stored id is not valid anymore */ 5895 work->compound_fid = KSMBD_NO_FID; 5896 work->compound_pfid = KSMBD_NO_FID; 5897 } 5898 } else { 5899 volatile_id = req->VolatileFileId; 5900 } 5901 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5902 5903 rsp->StructureSize = cpu_to_le16(60); 5904 rsp->Reserved = 0; 5905 5906 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5907 struct kstat stat; 5908 int ret; 5909 5910 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5911 if (!fp) { 5912 err = -ENOENT; 5913 goto out; 5914 } 5915 5916 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5917 AT_STATX_SYNC_AS_STAT); 5918 if (ret) { 5919 ksmbd_fd_put(work, fp); 5920 goto out; 5921 } 5922 5923 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5924 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 5925 cpu_to_le64(stat.blocks << 9); 5926 rsp->EndOfFile = cpu_to_le64(stat.size); 5927 rsp->Attributes = fp->f_ci->m_fattr; 5928 rsp->CreationTime = cpu_to_le64(fp->create_time); 5929 time = ksmbd_UnixTimeToNT(stat.atime); 5930 rsp->LastAccessTime = cpu_to_le64(time); 5931 time = ksmbd_UnixTimeToNT(stat.mtime); 5932 rsp->LastWriteTime = cpu_to_le64(time); 5933 time = ksmbd_UnixTimeToNT(stat.ctime); 5934 rsp->ChangeTime = cpu_to_le64(time); 5935 ksmbd_fd_put(work, fp); 5936 } else { 5937 rsp->Flags = 0; 5938 rsp->AllocationSize = 0; 5939 rsp->EndOfFile = 0; 5940 rsp->Attributes = 0; 5941 rsp->CreationTime = 0; 5942 rsp->LastAccessTime = 0; 5943 rsp->LastWriteTime = 0; 5944 rsp->ChangeTime = 0; 5945 } 5946 5947 err = ksmbd_close_fd(work, volatile_id); 5948 out: 5949 if (!err) 5950 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 5951 sizeof(struct smb2_close_rsp)); 5952 5953 if (err) { 5954 if (rsp->hdr.Status == 0) 5955 rsp->hdr.Status = STATUS_FILE_CLOSED; 5956 smb2_set_err_rsp(work); 5957 } 5958 5959 return err; 5960 } 5961 5962 /** 5963 * smb2_echo() - handler for smb2 echo(ping) command 5964 * @work: smb work containing echo request buffer 5965 * 5966 * Return: 0 on success, otherwise error 5967 */ 5968 int smb2_echo(struct ksmbd_work *work) 5969 { 5970 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); 5971 5972 ksmbd_debug(SMB, "Received smb2 echo request\n"); 5973 5974 if (work->next_smb2_rcv_hdr_off) 5975 rsp = ksmbd_resp_buf_next(work); 5976 5977 rsp->StructureSize = cpu_to_le16(4); 5978 rsp->Reserved = 0; 5979 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 5980 } 5981 5982 static int smb2_rename(struct ksmbd_work *work, 5983 struct ksmbd_file *fp, 5984 struct smb2_file_rename_info *file_info, 5985 struct nls_table *local_nls) 5986 { 5987 struct ksmbd_share_config *share = fp->tcon->share_conf; 5988 char *new_name = NULL; 5989 int rc, flags = 0; 5990 5991 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 5992 new_name = smb2_get_name(file_info->FileName, 5993 le32_to_cpu(file_info->FileNameLength), 5994 local_nls); 5995 if (IS_ERR(new_name)) 5996 return PTR_ERR(new_name); 5997 5998 if (fp->is_posix_ctxt == false && strchr(new_name, ':')) { 5999 int s_type; 6000 char *xattr_stream_name, *stream_name = NULL; 6001 size_t xattr_stream_size; 6002 int len; 6003 6004 rc = parse_stream_name(new_name, &stream_name, &s_type); 6005 if (rc < 0) 6006 goto out; 6007 6008 len = strlen(new_name); 6009 if (len > 0 && new_name[len - 1] != '/') { 6010 pr_err("not allow base filename in rename\n"); 6011 rc = -ESHARE; 6012 goto out; 6013 } 6014 6015 rc = ksmbd_vfs_xattr_stream_name(stream_name, 6016 &xattr_stream_name, 6017 &xattr_stream_size, 6018 s_type); 6019 if (rc) 6020 goto out; 6021 6022 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 6023 &fp->filp->f_path, 6024 xattr_stream_name, 6025 NULL, 0, 0, true); 6026 if (rc < 0) { 6027 pr_err("failed to store stream name in xattr: %d\n", 6028 rc); 6029 rc = -EINVAL; 6030 goto out; 6031 } 6032 6033 goto out; 6034 } 6035 6036 ksmbd_debug(SMB, "new name %s\n", new_name); 6037 if (ksmbd_share_veto_filename(share, new_name)) { 6038 rc = -ENOENT; 6039 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 6040 goto out; 6041 } 6042 6043 if (!file_info->ReplaceIfExists) 6044 flags = RENAME_NOREPLACE; 6045 6046 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 6047 if (!rc) 6048 smb_break_all_levII_oplock(work, fp, 0); 6049 out: 6050 kfree(new_name); 6051 return rc; 6052 } 6053 6054 static int smb2_create_link(struct ksmbd_work *work, 6055 struct ksmbd_share_config *share, 6056 struct smb2_file_link_info *file_info, 6057 unsigned int buf_len, struct file *filp, 6058 struct nls_table *local_nls) 6059 { 6060 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 6061 struct path path; 6062 int rc; 6063 6064 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 6065 le32_to_cpu(file_info->FileNameLength)) 6066 return -EINVAL; 6067 6068 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 6069 pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP); 6070 if (!pathname) 6071 return -ENOMEM; 6072 6073 link_name = smb2_get_name(file_info->FileName, 6074 le32_to_cpu(file_info->FileNameLength), 6075 local_nls); 6076 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 6077 rc = -EINVAL; 6078 goto out; 6079 } 6080 6081 ksmbd_debug(SMB, "link name is %s\n", link_name); 6082 target_name = file_path(filp, pathname, PATH_MAX); 6083 if (IS_ERR(target_name)) { 6084 rc = -EINVAL; 6085 goto out; 6086 } 6087 6088 ksmbd_debug(SMB, "target name is %s\n", target_name); 6089 rc = ksmbd_vfs_kern_path_start_removing(work, link_name, LOOKUP_NO_SYMLINKS, 6090 &path, 0); 6091 if (rc) { 6092 if (rc != -ENOENT) 6093 goto out; 6094 } else { 6095 if (file_info->ReplaceIfExists) { 6096 rc = ksmbd_vfs_remove_file(work, &path); 6097 if (rc) { 6098 rc = -EINVAL; 6099 ksmbd_debug(SMB, "cannot delete %s\n", 6100 link_name); 6101 goto out; 6102 } 6103 } else { 6104 rc = -EEXIST; 6105 ksmbd_debug(SMB, "link already exists\n"); 6106 goto out; 6107 } 6108 ksmbd_vfs_kern_path_end_removing(&path); 6109 } 6110 rc = ksmbd_vfs_link(work, target_name, link_name); 6111 if (rc) 6112 rc = -EINVAL; 6113 out: 6114 6115 if (!IS_ERR(link_name)) 6116 kfree(link_name); 6117 kfree(pathname); 6118 return rc; 6119 } 6120 6121 static int set_file_basic_info(struct ksmbd_file *fp, 6122 struct smb2_file_basic_info *file_info, 6123 struct ksmbd_share_config *share) 6124 { 6125 struct iattr attrs; 6126 struct file *filp; 6127 struct inode *inode; 6128 struct mnt_idmap *idmap; 6129 int rc = 0; 6130 6131 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 6132 return -EACCES; 6133 6134 attrs.ia_valid = 0; 6135 filp = fp->filp; 6136 inode = file_inode(filp); 6137 idmap = file_mnt_idmap(filp); 6138 6139 if (file_info->CreationTime) 6140 fp->create_time = le64_to_cpu(file_info->CreationTime); 6141 6142 if (file_info->LastAccessTime) { 6143 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 6144 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 6145 } 6146 6147 if (file_info->ChangeTime) 6148 inode_set_ctime_to_ts(inode, 6149 ksmbd_NTtimeToUnix(file_info->ChangeTime)); 6150 6151 if (file_info->LastWriteTime) { 6152 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 6153 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME); 6154 } 6155 6156 if (file_info->Attributes) { 6157 if (!S_ISDIR(inode->i_mode) && 6158 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 6159 pr_err("can't change a file to a directory\n"); 6160 return -EINVAL; 6161 } 6162 6163 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 6164 fp->f_ci->m_fattr = file_info->Attributes | 6165 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 6166 } 6167 6168 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 6169 (file_info->CreationTime || file_info->Attributes)) { 6170 struct xattr_dos_attrib da = {0}; 6171 6172 da.version = 4; 6173 da.itime = fp->itime; 6174 da.create_time = fp->create_time; 6175 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 6176 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 6177 XATTR_DOSINFO_ITIME; 6178 6179 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 6180 true); 6181 if (rc) 6182 ksmbd_debug(SMB, 6183 "failed to restore file attribute in EA\n"); 6184 rc = 0; 6185 } 6186 6187 if (attrs.ia_valid) { 6188 struct dentry *dentry = filp->f_path.dentry; 6189 struct inode *inode = d_inode(dentry); 6190 6191 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 6192 return -EACCES; 6193 6194 inode_lock(inode); 6195 rc = notify_change(idmap, dentry, &attrs, NULL); 6196 inode_unlock(inode); 6197 } 6198 return rc; 6199 } 6200 6201 static int set_file_allocation_info(struct ksmbd_work *work, 6202 struct ksmbd_file *fp, 6203 struct smb2_file_alloc_info *file_alloc_info) 6204 { 6205 /* 6206 * TODO : It's working fine only when store dos attributes 6207 * is not yes. need to implement a logic which works 6208 * properly with any smb.conf option 6209 */ 6210 6211 loff_t alloc_blks; 6212 struct inode *inode; 6213 struct kstat stat; 6214 int rc; 6215 6216 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6217 return -EACCES; 6218 6219 if (ksmbd_stream_fd(fp) == true) 6220 return 0; 6221 6222 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6223 AT_STATX_SYNC_AS_STAT); 6224 if (rc) 6225 return rc; 6226 6227 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 6228 inode = file_inode(fp->filp); 6229 6230 if (alloc_blks > stat.blocks) { 6231 smb_break_all_levII_oplock(work, fp, 1); 6232 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 6233 alloc_blks * 512); 6234 if (rc && rc != -EOPNOTSUPP) { 6235 pr_err("vfs_fallocate is failed : %d\n", rc); 6236 return rc; 6237 } 6238 } else if (alloc_blks < stat.blocks) { 6239 loff_t size; 6240 6241 /* 6242 * Allocation size could be smaller than original one 6243 * which means allocated blocks in file should be 6244 * deallocated. use truncate to cut out it, but inode 6245 * size is also updated with truncate offset. 6246 * inode size is retained by backup inode size. 6247 */ 6248 size = i_size_read(inode); 6249 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 6250 if (rc) { 6251 pr_err("truncate failed!, err %d\n", rc); 6252 return rc; 6253 } 6254 if (size < alloc_blks * 512) 6255 i_size_write(inode, size); 6256 } 6257 return 0; 6258 } 6259 6260 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6261 struct smb2_file_eof_info *file_eof_info) 6262 { 6263 loff_t newsize; 6264 struct inode *inode; 6265 int rc; 6266 6267 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6268 return -EACCES; 6269 6270 newsize = le64_to_cpu(file_eof_info->EndOfFile); 6271 inode = file_inode(fp->filp); 6272 6273 /* 6274 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 6275 * on FAT32 shared device, truncate execution time is too long 6276 * and network error could cause from windows client. because 6277 * truncate of some filesystem like FAT32 fill zero data in 6278 * truncated range. 6279 */ 6280 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC && 6281 ksmbd_stream_fd(fp) == false) { 6282 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 6283 rc = ksmbd_vfs_truncate(work, fp, newsize); 6284 if (rc) { 6285 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 6286 if (rc != -EAGAIN) 6287 rc = -EBADF; 6288 return rc; 6289 } 6290 } 6291 return 0; 6292 } 6293 6294 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6295 struct smb2_file_rename_info *rename_info, 6296 unsigned int buf_len) 6297 { 6298 if (!(fp->daccess & FILE_DELETE_LE)) { 6299 pr_err("no right to delete : 0x%x\n", fp->daccess); 6300 return -EACCES; 6301 } 6302 6303 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 6304 le32_to_cpu(rename_info->FileNameLength)) 6305 return -EINVAL; 6306 6307 if (!le32_to_cpu(rename_info->FileNameLength)) 6308 return -EINVAL; 6309 6310 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 6311 } 6312 6313 static int set_file_disposition_info(struct ksmbd_file *fp, 6314 struct smb2_file_disposition_info *file_info) 6315 { 6316 struct inode *inode; 6317 6318 if (!(fp->daccess & FILE_DELETE_LE)) { 6319 pr_err("no right to delete : 0x%x\n", fp->daccess); 6320 return -EACCES; 6321 } 6322 6323 inode = file_inode(fp->filp); 6324 if (file_info->DeletePending) { 6325 if (S_ISDIR(inode->i_mode) && 6326 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 6327 return -EBUSY; 6328 ksmbd_set_inode_pending_delete(fp); 6329 } else { 6330 ksmbd_clear_inode_pending_delete(fp); 6331 } 6332 return 0; 6333 } 6334 6335 static int set_file_position_info(struct ksmbd_file *fp, 6336 struct smb2_file_pos_info *file_info) 6337 { 6338 loff_t current_byte_offset; 6339 unsigned long sector_size; 6340 struct inode *inode; 6341 6342 inode = file_inode(fp->filp); 6343 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 6344 sector_size = inode->i_sb->s_blocksize; 6345 6346 if (current_byte_offset < 0 || 6347 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 6348 current_byte_offset & (sector_size - 1))) { 6349 pr_err("CurrentByteOffset is not valid : %llu\n", 6350 current_byte_offset); 6351 return -EINVAL; 6352 } 6353 6354 if (ksmbd_stream_fd(fp) == false) 6355 fp->filp->f_pos = current_byte_offset; 6356 else { 6357 if (current_byte_offset > XATTR_SIZE_MAX) 6358 current_byte_offset = XATTR_SIZE_MAX; 6359 fp->stream.pos = current_byte_offset; 6360 } 6361 return 0; 6362 } 6363 6364 static int set_file_mode_info(struct ksmbd_file *fp, 6365 struct smb2_file_mode_info *file_info) 6366 { 6367 __le32 mode; 6368 6369 mode = file_info->Mode; 6370 6371 if ((mode & ~FILE_MODE_INFO_MASK)) { 6372 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 6373 return -EINVAL; 6374 } 6375 6376 /* 6377 * TODO : need to implement consideration for 6378 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 6379 */ 6380 ksmbd_vfs_set_fadvise(fp->filp, mode); 6381 fp->coption = mode; 6382 return 0; 6383 } 6384 6385 /** 6386 * smb2_set_info_file() - handler for smb2 set info command 6387 * @work: smb work containing set info command buffer 6388 * @fp: ksmbd_file pointer 6389 * @req: request buffer pointer 6390 * @share: ksmbd_share_config pointer 6391 * 6392 * Return: 0 on success, otherwise error 6393 */ 6394 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 6395 struct smb2_set_info_req *req, 6396 struct ksmbd_share_config *share) 6397 { 6398 unsigned int buf_len = le32_to_cpu(req->BufferLength); 6399 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); 6400 6401 switch (req->FileInfoClass) { 6402 case FILE_BASIC_INFORMATION: 6403 { 6404 if (buf_len < sizeof(struct smb2_file_basic_info)) 6405 return -EMSGSIZE; 6406 6407 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share); 6408 } 6409 case FILE_ALLOCATION_INFORMATION: 6410 { 6411 if (buf_len < sizeof(struct smb2_file_alloc_info)) 6412 return -EMSGSIZE; 6413 6414 return set_file_allocation_info(work, fp, 6415 (struct smb2_file_alloc_info *)buffer); 6416 } 6417 case FILE_END_OF_FILE_INFORMATION: 6418 { 6419 if (buf_len < sizeof(struct smb2_file_eof_info)) 6420 return -EMSGSIZE; 6421 6422 return set_end_of_file_info(work, fp, 6423 (struct smb2_file_eof_info *)buffer); 6424 } 6425 case FILE_RENAME_INFORMATION: 6426 { 6427 if (buf_len < sizeof(struct smb2_file_rename_info)) 6428 return -EMSGSIZE; 6429 6430 return set_rename_info(work, fp, 6431 (struct smb2_file_rename_info *)buffer, 6432 buf_len); 6433 } 6434 case FILE_LINK_INFORMATION: 6435 { 6436 if (buf_len < sizeof(struct smb2_file_link_info)) 6437 return -EMSGSIZE; 6438 6439 return smb2_create_link(work, work->tcon->share_conf, 6440 (struct smb2_file_link_info *)buffer, 6441 buf_len, fp->filp, 6442 work->conn->local_nls); 6443 } 6444 case FILE_DISPOSITION_INFORMATION: 6445 { 6446 if (buf_len < sizeof(struct smb2_file_disposition_info)) 6447 return -EMSGSIZE; 6448 6449 return set_file_disposition_info(fp, 6450 (struct smb2_file_disposition_info *)buffer); 6451 } 6452 case FILE_FULL_EA_INFORMATION: 6453 { 6454 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 6455 pr_err("Not permitted to write ext attr: 0x%x\n", 6456 fp->daccess); 6457 return -EACCES; 6458 } 6459 6460 if (buf_len < sizeof(struct smb2_ea_info)) 6461 return -EMSGSIZE; 6462 6463 return smb2_set_ea((struct smb2_ea_info *)buffer, 6464 buf_len, &fp->filp->f_path, true); 6465 } 6466 case FILE_POSITION_INFORMATION: 6467 { 6468 if (buf_len < sizeof(struct smb2_file_pos_info)) 6469 return -EMSGSIZE; 6470 6471 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); 6472 } 6473 case FILE_MODE_INFORMATION: 6474 { 6475 if (buf_len < sizeof(struct smb2_file_mode_info)) 6476 return -EMSGSIZE; 6477 6478 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); 6479 } 6480 } 6481 6482 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6483 return -EOPNOTSUPP; 6484 } 6485 6486 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6487 char *buffer, int buf_len) 6488 { 6489 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6490 6491 fp->saccess |= FILE_SHARE_DELETE_LE; 6492 6493 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6494 buf_len, false, true); 6495 } 6496 6497 /** 6498 * smb2_set_info() - handler for smb2 set info command handler 6499 * @work: smb work containing set info request buffer 6500 * 6501 * Return: 0 on success, otherwise error 6502 */ 6503 int smb2_set_info(struct ksmbd_work *work) 6504 { 6505 struct smb2_set_info_req *req; 6506 struct smb2_set_info_rsp *rsp; 6507 struct ksmbd_file *fp = NULL; 6508 int rc = 0; 6509 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6510 6511 ksmbd_debug(SMB, "Received smb2 set info request\n"); 6512 6513 if (work->next_smb2_rcv_hdr_off) { 6514 req = ksmbd_req_buf_next(work); 6515 rsp = ksmbd_resp_buf_next(work); 6516 if (!has_file_id(req->VolatileFileId)) { 6517 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6518 work->compound_fid); 6519 id = work->compound_fid; 6520 pid = work->compound_pfid; 6521 } 6522 } else { 6523 req = smb2_get_msg(work->request_buf); 6524 rsp = smb2_get_msg(work->response_buf); 6525 } 6526 6527 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6528 ksmbd_debug(SMB, "User does not have write permission\n"); 6529 pr_err("User does not have write permission\n"); 6530 rc = -EACCES; 6531 goto err_out; 6532 } 6533 6534 if (!has_file_id(id)) { 6535 id = req->VolatileFileId; 6536 pid = req->PersistentFileId; 6537 } 6538 6539 fp = ksmbd_lookup_fd_slow(work, id, pid); 6540 if (!fp) { 6541 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6542 rc = -ENOENT; 6543 goto err_out; 6544 } 6545 6546 switch (req->InfoType) { 6547 case SMB2_O_INFO_FILE: 6548 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6549 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6550 break; 6551 case SMB2_O_INFO_SECURITY: 6552 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6553 if (ksmbd_override_fsids(work)) { 6554 rc = -ENOMEM; 6555 goto err_out; 6556 } 6557 rc = smb2_set_info_sec(fp, 6558 le32_to_cpu(req->AdditionalInformation), 6559 (char *)req + le16_to_cpu(req->BufferOffset), 6560 le32_to_cpu(req->BufferLength)); 6561 ksmbd_revert_fsids(work); 6562 break; 6563 default: 6564 rc = -EOPNOTSUPP; 6565 } 6566 6567 if (rc < 0) 6568 goto err_out; 6569 6570 rsp->StructureSize = cpu_to_le16(2); 6571 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6572 sizeof(struct smb2_set_info_rsp)); 6573 if (rc) 6574 goto err_out; 6575 ksmbd_fd_put(work, fp); 6576 return 0; 6577 6578 err_out: 6579 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6580 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6581 else if (rc == -EINVAL) 6582 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6583 else if (rc == -EMSGSIZE) 6584 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 6585 else if (rc == -ESHARE) 6586 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6587 else if (rc == -ENOENT) 6588 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6589 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6590 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6591 else if (rc == -EAGAIN) 6592 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6593 else if (rc == -EBADF || rc == -ESTALE) 6594 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6595 else if (rc == -EEXIST) 6596 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6597 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6598 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6599 smb2_set_err_rsp(work); 6600 ksmbd_fd_put(work, fp); 6601 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6602 return rc; 6603 } 6604 6605 /** 6606 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6607 * @work: smb work containing read IPC pipe command buffer 6608 * 6609 * Return: 0 on success, otherwise error 6610 */ 6611 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6612 { 6613 int nbytes = 0, err; 6614 u64 id; 6615 struct ksmbd_rpc_command *rpc_resp; 6616 struct smb2_read_req *req; 6617 struct smb2_read_rsp *rsp; 6618 6619 WORK_BUFFERS(work, req, rsp); 6620 6621 id = req->VolatileFileId; 6622 6623 rpc_resp = ksmbd_rpc_read(work->sess, id); 6624 if (rpc_resp) { 6625 void *aux_payload_buf; 6626 6627 if (rpc_resp->flags != KSMBD_RPC_OK) { 6628 err = -EINVAL; 6629 goto out; 6630 } 6631 6632 aux_payload_buf = 6633 kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP); 6634 if (!aux_payload_buf) { 6635 err = -ENOMEM; 6636 goto out; 6637 } 6638 6639 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6640 6641 nbytes = rpc_resp->payload_sz; 6642 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6643 offsetof(struct smb2_read_rsp, Buffer), 6644 aux_payload_buf, nbytes); 6645 if (err) { 6646 kvfree(aux_payload_buf); 6647 goto out; 6648 } 6649 kvfree(rpc_resp); 6650 } else { 6651 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6652 offsetof(struct smb2_read_rsp, Buffer)); 6653 if (err) 6654 goto out; 6655 } 6656 6657 rsp->StructureSize = cpu_to_le16(17); 6658 rsp->DataOffset = 80; 6659 rsp->Reserved = 0; 6660 rsp->DataLength = cpu_to_le32(nbytes); 6661 rsp->DataRemaining = 0; 6662 rsp->Flags = 0; 6663 return 0; 6664 6665 out: 6666 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6667 smb2_set_err_rsp(work); 6668 kvfree(rpc_resp); 6669 return err; 6670 } 6671 6672 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6673 struct smbdirect_buffer_descriptor_v1 *desc, 6674 __le32 Channel, 6675 __le16 ChannelInfoLength) 6676 { 6677 unsigned int i, ch_count; 6678 6679 if (work->conn->dialect == SMB30_PROT_ID && 6680 Channel != SMB2_CHANNEL_RDMA_V1) 6681 return -EINVAL; 6682 6683 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6684 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6685 for (i = 0; i < ch_count; i++) { 6686 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6687 i, 6688 le32_to_cpu(desc[i].token), 6689 le32_to_cpu(desc[i].length)); 6690 } 6691 } 6692 if (!ch_count) 6693 return -EINVAL; 6694 6695 work->need_invalidate_rkey = 6696 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6697 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6698 work->remote_key = le32_to_cpu(desc->token); 6699 return 0; 6700 } 6701 6702 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6703 struct smb2_read_req *req, void *data_buf, 6704 size_t length) 6705 { 6706 int err; 6707 6708 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6709 (struct smbdirect_buffer_descriptor_v1 *) 6710 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6711 le16_to_cpu(req->ReadChannelInfoLength)); 6712 if (err) 6713 return err; 6714 6715 return length; 6716 } 6717 6718 /** 6719 * smb2_read() - handler for smb2 read from file 6720 * @work: smb work containing read command buffer 6721 * 6722 * Return: 0 on success, otherwise error 6723 */ 6724 int smb2_read(struct ksmbd_work *work) 6725 { 6726 struct ksmbd_conn *conn = work->conn; 6727 struct smb2_read_req *req; 6728 struct smb2_read_rsp *rsp; 6729 struct ksmbd_file *fp = NULL; 6730 loff_t offset; 6731 size_t length, mincount; 6732 ssize_t nbytes = 0, remain_bytes = 0; 6733 int err = 0; 6734 bool is_rdma_channel = false; 6735 unsigned int max_read_size = conn->vals->max_read_size; 6736 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6737 void *aux_payload_buf; 6738 6739 ksmbd_debug(SMB, "Received smb2 read request\n"); 6740 6741 if (test_share_config_flag(work->tcon->share_conf, 6742 KSMBD_SHARE_FLAG_PIPE)) { 6743 ksmbd_debug(SMB, "IPC pipe read request\n"); 6744 return smb2_read_pipe(work); 6745 } 6746 6747 if (work->next_smb2_rcv_hdr_off) { 6748 req = ksmbd_req_buf_next(work); 6749 rsp = ksmbd_resp_buf_next(work); 6750 if (!has_file_id(req->VolatileFileId)) { 6751 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6752 work->compound_fid); 6753 id = work->compound_fid; 6754 pid = work->compound_pfid; 6755 } 6756 } else { 6757 req = smb2_get_msg(work->request_buf); 6758 rsp = smb2_get_msg(work->response_buf); 6759 } 6760 6761 if (!has_file_id(id)) { 6762 id = req->VolatileFileId; 6763 pid = req->PersistentFileId; 6764 } 6765 6766 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6767 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6768 is_rdma_channel = true; 6769 max_read_size = get_smbd_max_read_write_size(work->conn->transport); 6770 if (max_read_size == 0) { 6771 err = -EINVAL; 6772 goto out; 6773 } 6774 } 6775 6776 if (is_rdma_channel == true) { 6777 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6778 6779 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6780 err = -EINVAL; 6781 goto out; 6782 } 6783 err = smb2_set_remote_key_for_rdma(work, 6784 (struct smbdirect_buffer_descriptor_v1 *) 6785 ((char *)req + ch_offset), 6786 req->Channel, 6787 req->ReadChannelInfoLength); 6788 if (err) 6789 goto out; 6790 } 6791 6792 fp = ksmbd_lookup_fd_slow(work, id, pid); 6793 if (!fp) { 6794 err = -ENOENT; 6795 goto out; 6796 } 6797 6798 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6799 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6800 err = -EACCES; 6801 goto out; 6802 } 6803 6804 offset = le64_to_cpu(req->Offset); 6805 if (offset < 0) { 6806 err = -EINVAL; 6807 goto out; 6808 } 6809 length = le32_to_cpu(req->Length); 6810 mincount = le32_to_cpu(req->MinimumCount); 6811 6812 if (length > max_read_size) { 6813 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6814 max_read_size); 6815 err = -EINVAL; 6816 goto out; 6817 } 6818 6819 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6820 fp->filp, offset, length); 6821 6822 aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP); 6823 if (!aux_payload_buf) { 6824 err = -ENOMEM; 6825 goto out; 6826 } 6827 6828 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6829 if (nbytes < 0) { 6830 kvfree(aux_payload_buf); 6831 err = nbytes; 6832 goto out; 6833 } 6834 6835 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6836 kvfree(aux_payload_buf); 6837 rsp->hdr.Status = STATUS_END_OF_FILE; 6838 smb2_set_err_rsp(work); 6839 ksmbd_fd_put(work, fp); 6840 return -ENODATA; 6841 } 6842 6843 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6844 nbytes, offset, mincount); 6845 6846 if (is_rdma_channel == true) { 6847 /* write data to the client using rdma channel */ 6848 remain_bytes = smb2_read_rdma_channel(work, req, 6849 aux_payload_buf, 6850 nbytes); 6851 kvfree(aux_payload_buf); 6852 aux_payload_buf = NULL; 6853 nbytes = 0; 6854 if (remain_bytes < 0) { 6855 err = (int)remain_bytes; 6856 goto out; 6857 } 6858 } 6859 6860 rsp->StructureSize = cpu_to_le16(17); 6861 rsp->DataOffset = 80; 6862 rsp->Reserved = 0; 6863 rsp->DataLength = cpu_to_le32(nbytes); 6864 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6865 rsp->Flags = 0; 6866 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6867 offsetof(struct smb2_read_rsp, Buffer), 6868 aux_payload_buf, nbytes); 6869 if (err) { 6870 kvfree(aux_payload_buf); 6871 goto out; 6872 } 6873 ksmbd_fd_put(work, fp); 6874 return 0; 6875 6876 out: 6877 if (err) { 6878 if (err == -EISDIR) 6879 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6880 else if (err == -EAGAIN) 6881 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6882 else if (err == -ENOENT) 6883 rsp->hdr.Status = STATUS_FILE_CLOSED; 6884 else if (err == -EACCES) 6885 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6886 else if (err == -ESHARE) 6887 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6888 else if (err == -EINVAL) 6889 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6890 else 6891 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6892 6893 smb2_set_err_rsp(work); 6894 } 6895 ksmbd_fd_put(work, fp); 6896 return err; 6897 } 6898 6899 /** 6900 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6901 * @work: smb work containing write IPC pipe command buffer 6902 * 6903 * Return: 0 on success, otherwise error 6904 */ 6905 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6906 { 6907 struct smb2_write_req *req; 6908 struct smb2_write_rsp *rsp; 6909 struct ksmbd_rpc_command *rpc_resp; 6910 u64 id = 0; 6911 int err = 0, ret = 0; 6912 char *data_buf; 6913 size_t length; 6914 6915 WORK_BUFFERS(work, req, rsp); 6916 6917 length = le32_to_cpu(req->Length); 6918 id = req->VolatileFileId; 6919 6920 if ((u64)le16_to_cpu(req->DataOffset) + length > 6921 get_rfc1002_len(work->request_buf)) { 6922 pr_err("invalid write data offset %u, smb_len %u\n", 6923 le16_to_cpu(req->DataOffset), 6924 get_rfc1002_len(work->request_buf)); 6925 err = -EINVAL; 6926 goto out; 6927 } 6928 6929 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6930 le16_to_cpu(req->DataOffset)); 6931 6932 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6933 if (rpc_resp) { 6934 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6935 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6936 kvfree(rpc_resp); 6937 smb2_set_err_rsp(work); 6938 return -EOPNOTSUPP; 6939 } 6940 if (rpc_resp->flags != KSMBD_RPC_OK) { 6941 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6942 smb2_set_err_rsp(work); 6943 kvfree(rpc_resp); 6944 return ret; 6945 } 6946 kvfree(rpc_resp); 6947 } 6948 6949 rsp->StructureSize = cpu_to_le16(17); 6950 rsp->DataOffset = 0; 6951 rsp->Reserved = 0; 6952 rsp->DataLength = cpu_to_le32(length); 6953 rsp->DataRemaining = 0; 6954 rsp->Reserved2 = 0; 6955 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6956 offsetof(struct smb2_write_rsp, Buffer)); 6957 out: 6958 if (err) { 6959 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6960 smb2_set_err_rsp(work); 6961 } 6962 6963 return err; 6964 } 6965 6966 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6967 struct smb2_write_req *req, 6968 struct ksmbd_file *fp, 6969 loff_t offset, size_t length, bool sync) 6970 { 6971 char *data_buf; 6972 int ret; 6973 ssize_t nbytes; 6974 6975 data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP); 6976 if (!data_buf) 6977 return -ENOMEM; 6978 6979 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6980 (struct smbdirect_buffer_descriptor_v1 *) 6981 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6982 le16_to_cpu(req->WriteChannelInfoLength)); 6983 if (ret < 0) { 6984 kvfree(data_buf); 6985 return ret; 6986 } 6987 6988 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 6989 kvfree(data_buf); 6990 if (ret < 0) 6991 return ret; 6992 6993 return nbytes; 6994 } 6995 6996 /** 6997 * smb2_write() - handler for smb2 write from file 6998 * @work: smb work containing write command buffer 6999 * 7000 * Return: 0 on success, otherwise error 7001 */ 7002 int smb2_write(struct ksmbd_work *work) 7003 { 7004 struct smb2_write_req *req; 7005 struct smb2_write_rsp *rsp; 7006 struct ksmbd_file *fp = NULL; 7007 loff_t offset; 7008 size_t length; 7009 ssize_t nbytes; 7010 char *data_buf; 7011 bool writethrough = false, is_rdma_channel = false; 7012 int err = 0; 7013 unsigned int max_write_size = work->conn->vals->max_write_size; 7014 7015 ksmbd_debug(SMB, "Received smb2 write request\n"); 7016 7017 WORK_BUFFERS(work, req, rsp); 7018 7019 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 7020 ksmbd_debug(SMB, "IPC pipe write request\n"); 7021 return smb2_write_pipe(work); 7022 } 7023 7024 offset = le64_to_cpu(req->Offset); 7025 if (offset < 0) 7026 return -EINVAL; 7027 length = le32_to_cpu(req->Length); 7028 7029 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 7030 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 7031 is_rdma_channel = true; 7032 max_write_size = get_smbd_max_read_write_size(work->conn->transport); 7033 if (max_write_size == 0) { 7034 err = -EINVAL; 7035 goto out; 7036 } 7037 length = le32_to_cpu(req->RemainingBytes); 7038 } 7039 7040 if (is_rdma_channel == true) { 7041 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 7042 7043 if (req->Length != 0 || req->DataOffset != 0 || 7044 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 7045 err = -EINVAL; 7046 goto out; 7047 } 7048 err = smb2_set_remote_key_for_rdma(work, 7049 (struct smbdirect_buffer_descriptor_v1 *) 7050 ((char *)req + ch_offset), 7051 req->Channel, 7052 req->WriteChannelInfoLength); 7053 if (err) 7054 goto out; 7055 } 7056 7057 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7058 ksmbd_debug(SMB, "User does not have write permission\n"); 7059 err = -EACCES; 7060 goto out; 7061 } 7062 7063 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7064 if (!fp) { 7065 err = -ENOENT; 7066 goto out; 7067 } 7068 7069 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 7070 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 7071 err = -EACCES; 7072 goto out; 7073 } 7074 7075 if (length > max_write_size) { 7076 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 7077 max_write_size); 7078 err = -EINVAL; 7079 goto out; 7080 } 7081 7082 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 7083 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 7084 writethrough = true; 7085 7086 if (is_rdma_channel == false) { 7087 if (le16_to_cpu(req->DataOffset) < 7088 offsetof(struct smb2_write_req, Buffer)) { 7089 err = -EINVAL; 7090 goto out; 7091 } 7092 7093 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7094 le16_to_cpu(req->DataOffset)); 7095 7096 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 7097 fp->filp, offset, length); 7098 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 7099 writethrough, &nbytes); 7100 if (err < 0) 7101 goto out; 7102 } else { 7103 /* read data from the client using rdma channel, and 7104 * write the data. 7105 */ 7106 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 7107 writethrough); 7108 if (nbytes < 0) { 7109 err = (int)nbytes; 7110 goto out; 7111 } 7112 } 7113 7114 rsp->StructureSize = cpu_to_le16(17); 7115 rsp->DataOffset = 0; 7116 rsp->Reserved = 0; 7117 rsp->DataLength = cpu_to_le32(nbytes); 7118 rsp->DataRemaining = 0; 7119 rsp->Reserved2 = 0; 7120 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 7121 if (err) 7122 goto out; 7123 ksmbd_fd_put(work, fp); 7124 return 0; 7125 7126 out: 7127 if (err == -EAGAIN) 7128 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7129 else if (err == -ENOSPC || err == -EFBIG) 7130 rsp->hdr.Status = STATUS_DISK_FULL; 7131 else if (err == -ENOENT) 7132 rsp->hdr.Status = STATUS_FILE_CLOSED; 7133 else if (err == -EACCES) 7134 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7135 else if (err == -ESHARE) 7136 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 7137 else if (err == -EINVAL) 7138 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7139 else 7140 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7141 7142 smb2_set_err_rsp(work); 7143 ksmbd_fd_put(work, fp); 7144 return err; 7145 } 7146 7147 /** 7148 * smb2_flush() - handler for smb2 flush file - fsync 7149 * @work: smb work containing flush command buffer 7150 * 7151 * Return: 0 on success, otherwise error 7152 */ 7153 int smb2_flush(struct ksmbd_work *work) 7154 { 7155 struct smb2_flush_req *req; 7156 struct smb2_flush_rsp *rsp; 7157 int err; 7158 7159 WORK_BUFFERS(work, req, rsp); 7160 7161 ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId); 7162 7163 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 7164 if (err) 7165 goto out; 7166 7167 rsp->StructureSize = cpu_to_le16(4); 7168 rsp->Reserved = 0; 7169 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 7170 7171 out: 7172 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7173 smb2_set_err_rsp(work); 7174 return err; 7175 } 7176 7177 /** 7178 * smb2_cancel() - handler for smb2 cancel command 7179 * @work: smb work containing cancel command buffer 7180 * 7181 * Return: 0 on success, otherwise error 7182 */ 7183 int smb2_cancel(struct ksmbd_work *work) 7184 { 7185 struct ksmbd_conn *conn = work->conn; 7186 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 7187 struct smb2_hdr *chdr; 7188 struct ksmbd_work *iter; 7189 struct list_head *command_list; 7190 7191 if (work->next_smb2_rcv_hdr_off) 7192 hdr = ksmbd_resp_buf_next(work); 7193 7194 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 7195 hdr->MessageId, hdr->Flags); 7196 7197 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 7198 command_list = &conn->async_requests; 7199 7200 spin_lock(&conn->request_lock); 7201 list_for_each_entry(iter, command_list, 7202 async_request_entry) { 7203 chdr = smb2_get_msg(iter->request_buf); 7204 7205 if (iter->async_id != 7206 le64_to_cpu(hdr->Id.AsyncId)) 7207 continue; 7208 7209 ksmbd_debug(SMB, 7210 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 7211 le64_to_cpu(hdr->Id.AsyncId), 7212 le16_to_cpu(chdr->Command)); 7213 iter->state = KSMBD_WORK_CANCELLED; 7214 if (iter->cancel_fn) 7215 iter->cancel_fn(iter->cancel_argv); 7216 break; 7217 } 7218 spin_unlock(&conn->request_lock); 7219 } else { 7220 command_list = &conn->requests; 7221 7222 spin_lock(&conn->request_lock); 7223 list_for_each_entry(iter, command_list, request_entry) { 7224 chdr = smb2_get_msg(iter->request_buf); 7225 7226 if (chdr->MessageId != hdr->MessageId || 7227 iter == work) 7228 continue; 7229 7230 ksmbd_debug(SMB, 7231 "smb2 with mid %llu cancelled command = 0x%x\n", 7232 le64_to_cpu(hdr->MessageId), 7233 le16_to_cpu(chdr->Command)); 7234 iter->state = KSMBD_WORK_CANCELLED; 7235 break; 7236 } 7237 spin_unlock(&conn->request_lock); 7238 } 7239 7240 /* For SMB2_CANCEL command itself send no response*/ 7241 work->send_no_response = 1; 7242 return 0; 7243 } 7244 7245 struct file_lock *smb_flock_init(struct file *f) 7246 { 7247 struct file_lock *fl; 7248 7249 fl = locks_alloc_lock(); 7250 if (!fl) 7251 goto out; 7252 7253 locks_init_lock(fl); 7254 7255 fl->c.flc_owner = f; 7256 fl->c.flc_pid = current->tgid; 7257 fl->c.flc_file = f; 7258 fl->c.flc_flags = FL_POSIX; 7259 fl->fl_ops = NULL; 7260 fl->fl_lmops = NULL; 7261 7262 out: 7263 return fl; 7264 } 7265 7266 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 7267 { 7268 int cmd = -EINVAL; 7269 7270 /* Checking for wrong flag combination during lock request*/ 7271 switch (flags) { 7272 case SMB2_LOCKFLAG_SHARED: 7273 ksmbd_debug(SMB, "received shared request\n"); 7274 cmd = F_SETLKW; 7275 flock->c.flc_type = F_RDLCK; 7276 flock->c.flc_flags |= FL_SLEEP; 7277 break; 7278 case SMB2_LOCKFLAG_EXCLUSIVE: 7279 ksmbd_debug(SMB, "received exclusive request\n"); 7280 cmd = F_SETLKW; 7281 flock->c.flc_type = F_WRLCK; 7282 flock->c.flc_flags |= FL_SLEEP; 7283 break; 7284 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7285 ksmbd_debug(SMB, 7286 "received shared & fail immediately request\n"); 7287 cmd = F_SETLK; 7288 flock->c.flc_type = F_RDLCK; 7289 break; 7290 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7291 ksmbd_debug(SMB, 7292 "received exclusive & fail immediately request\n"); 7293 cmd = F_SETLK; 7294 flock->c.flc_type = F_WRLCK; 7295 break; 7296 case SMB2_LOCKFLAG_UNLOCK: 7297 ksmbd_debug(SMB, "received unlock request\n"); 7298 flock->c.flc_type = F_UNLCK; 7299 cmd = F_SETLK; 7300 break; 7301 } 7302 7303 return cmd; 7304 } 7305 7306 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 7307 unsigned int cmd, int flags, 7308 struct list_head *lock_list) 7309 { 7310 struct ksmbd_lock *lock; 7311 7312 lock = kzalloc(sizeof(struct ksmbd_lock), KSMBD_DEFAULT_GFP); 7313 if (!lock) 7314 return NULL; 7315 7316 lock->cmd = cmd; 7317 lock->fl = flock; 7318 lock->start = flock->fl_start; 7319 lock->end = flock->fl_end; 7320 lock->flags = flags; 7321 if (lock->start == lock->end) 7322 lock->zero_len = 1; 7323 INIT_LIST_HEAD(&lock->clist); 7324 INIT_LIST_HEAD(&lock->flist); 7325 INIT_LIST_HEAD(&lock->llist); 7326 list_add_tail(&lock->llist, lock_list); 7327 7328 return lock; 7329 } 7330 7331 static void smb2_remove_blocked_lock(void **argv) 7332 { 7333 struct file_lock *flock = (struct file_lock *)argv[0]; 7334 7335 ksmbd_vfs_posix_lock_unblock(flock); 7336 locks_wake_up(flock); 7337 } 7338 7339 static inline bool lock_defer_pending(struct file_lock *fl) 7340 { 7341 /* check pending lock waiters */ 7342 return waitqueue_active(&fl->c.flc_wait); 7343 } 7344 7345 /** 7346 * smb2_lock() - handler for smb2 file lock command 7347 * @work: smb work containing lock command buffer 7348 * 7349 * Return: 0 on success, otherwise error 7350 */ 7351 int smb2_lock(struct ksmbd_work *work) 7352 { 7353 struct smb2_lock_req *req; 7354 struct smb2_lock_rsp *rsp; 7355 struct smb2_lock_element *lock_ele; 7356 struct ksmbd_file *fp = NULL; 7357 struct file_lock *flock = NULL; 7358 struct file *filp = NULL; 7359 int lock_count; 7360 int flags = 0; 7361 int cmd = 0; 7362 int err = -EIO, i, rc = 0; 7363 u64 lock_start, lock_length; 7364 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 7365 struct ksmbd_conn *conn; 7366 int nolock = 0; 7367 LIST_HEAD(lock_list); 7368 LIST_HEAD(rollback_list); 7369 int prior_lock = 0, bkt; 7370 7371 WORK_BUFFERS(work, req, rsp); 7372 7373 ksmbd_debug(SMB, "Received smb2 lock request\n"); 7374 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7375 if (!fp) { 7376 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 7377 err = -ENOENT; 7378 goto out2; 7379 } 7380 7381 filp = fp->filp; 7382 lock_count = le16_to_cpu(req->LockCount); 7383 lock_ele = req->locks; 7384 7385 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 7386 if (!lock_count) { 7387 err = -EINVAL; 7388 goto out2; 7389 } 7390 7391 for (i = 0; i < lock_count; i++) { 7392 flags = le32_to_cpu(lock_ele[i].Flags); 7393 7394 flock = smb_flock_init(filp); 7395 if (!flock) 7396 goto out; 7397 7398 cmd = smb2_set_flock_flags(flock, flags); 7399 7400 lock_start = le64_to_cpu(lock_ele[i].Offset); 7401 lock_length = le64_to_cpu(lock_ele[i].Length); 7402 if (lock_start > U64_MAX - lock_length) { 7403 pr_err("Invalid lock range requested\n"); 7404 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7405 locks_free_lock(flock); 7406 goto out; 7407 } 7408 7409 if (lock_start > OFFSET_MAX) 7410 flock->fl_start = OFFSET_MAX; 7411 else 7412 flock->fl_start = lock_start; 7413 7414 lock_length = le64_to_cpu(lock_ele[i].Length); 7415 if (lock_length > OFFSET_MAX - flock->fl_start) 7416 lock_length = OFFSET_MAX - flock->fl_start; 7417 7418 flock->fl_end = flock->fl_start + lock_length; 7419 7420 if (flock->fl_end < flock->fl_start) { 7421 ksmbd_debug(SMB, 7422 "the end offset(%llx) is smaller than the start offset(%llx)\n", 7423 flock->fl_end, flock->fl_start); 7424 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7425 locks_free_lock(flock); 7426 goto out; 7427 } 7428 7429 /* Check conflict locks in one request */ 7430 list_for_each_entry(cmp_lock, &lock_list, llist) { 7431 if (cmp_lock->fl->fl_start <= flock->fl_start && 7432 cmp_lock->fl->fl_end >= flock->fl_end) { 7433 if (cmp_lock->fl->c.flc_type != F_UNLCK && 7434 flock->c.flc_type != F_UNLCK) { 7435 pr_err("conflict two locks in one request\n"); 7436 err = -EINVAL; 7437 locks_free_lock(flock); 7438 goto out; 7439 } 7440 } 7441 } 7442 7443 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 7444 if (!smb_lock) { 7445 err = -EINVAL; 7446 locks_free_lock(flock); 7447 goto out; 7448 } 7449 } 7450 7451 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7452 if (smb_lock->cmd < 0) { 7453 err = -EINVAL; 7454 goto out; 7455 } 7456 7457 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 7458 err = -EINVAL; 7459 goto out; 7460 } 7461 7462 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 7463 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 7464 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 7465 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 7466 err = -EINVAL; 7467 goto out; 7468 } 7469 7470 prior_lock = smb_lock->flags; 7471 7472 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 7473 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 7474 goto no_check_cl; 7475 7476 nolock = 1; 7477 /* check locks in connection list */ 7478 down_read(&conn_list_lock); 7479 hash_for_each(conn_list, bkt, conn, hlist) { 7480 spin_lock(&conn->llist_lock); 7481 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 7482 if (file_inode(cmp_lock->fl->c.flc_file) != 7483 file_inode(smb_lock->fl->c.flc_file)) 7484 continue; 7485 7486 if (lock_is_unlock(smb_lock->fl)) { 7487 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && 7488 cmp_lock->start == smb_lock->start && 7489 cmp_lock->end == smb_lock->end && 7490 !lock_defer_pending(cmp_lock->fl)) { 7491 nolock = 0; 7492 list_del(&cmp_lock->flist); 7493 list_del(&cmp_lock->clist); 7494 spin_unlock(&conn->llist_lock); 7495 up_read(&conn_list_lock); 7496 7497 locks_free_lock(cmp_lock->fl); 7498 kfree(cmp_lock); 7499 goto out_check_cl; 7500 } 7501 continue; 7502 } 7503 7504 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { 7505 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7506 continue; 7507 } else { 7508 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7509 continue; 7510 } 7511 7512 /* check zero byte lock range */ 7513 if (cmp_lock->zero_len && !smb_lock->zero_len && 7514 cmp_lock->start > smb_lock->start && 7515 cmp_lock->start < smb_lock->end) { 7516 spin_unlock(&conn->llist_lock); 7517 up_read(&conn_list_lock); 7518 pr_err("previous lock conflict with zero byte lock range\n"); 7519 goto out; 7520 } 7521 7522 if (smb_lock->zero_len && !cmp_lock->zero_len && 7523 smb_lock->start > cmp_lock->start && 7524 smb_lock->start < cmp_lock->end) { 7525 spin_unlock(&conn->llist_lock); 7526 up_read(&conn_list_lock); 7527 pr_err("current lock conflict with zero byte lock range\n"); 7528 goto out; 7529 } 7530 7531 if (((cmp_lock->start <= smb_lock->start && 7532 cmp_lock->end > smb_lock->start) || 7533 (cmp_lock->start < smb_lock->end && 7534 cmp_lock->end >= smb_lock->end)) && 7535 !cmp_lock->zero_len && !smb_lock->zero_len) { 7536 spin_unlock(&conn->llist_lock); 7537 up_read(&conn_list_lock); 7538 pr_err("Not allow lock operation on exclusive lock range\n"); 7539 goto out; 7540 } 7541 } 7542 spin_unlock(&conn->llist_lock); 7543 } 7544 up_read(&conn_list_lock); 7545 out_check_cl: 7546 if (lock_is_unlock(smb_lock->fl) && nolock) { 7547 pr_err("Try to unlock nolocked range\n"); 7548 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7549 goto out; 7550 } 7551 7552 no_check_cl: 7553 flock = smb_lock->fl; 7554 list_del(&smb_lock->llist); 7555 7556 if (smb_lock->zero_len) { 7557 err = 0; 7558 goto skip; 7559 } 7560 retry: 7561 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7562 skip: 7563 if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) { 7564 if (!rc) { 7565 ksmbd_debug(SMB, "File unlocked\n"); 7566 } else if (rc == -ENOENT) { 7567 rsp->hdr.Status = STATUS_NOT_LOCKED; 7568 goto out; 7569 } 7570 locks_free_lock(flock); 7571 kfree(smb_lock); 7572 } else { 7573 if (rc == FILE_LOCK_DEFERRED) { 7574 void **argv; 7575 7576 ksmbd_debug(SMB, 7577 "would have to wait for getting lock\n"); 7578 list_add(&smb_lock->llist, &rollback_list); 7579 7580 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP); 7581 if (!argv) { 7582 err = -ENOMEM; 7583 goto out; 7584 } 7585 argv[0] = flock; 7586 7587 rc = setup_async_work(work, 7588 smb2_remove_blocked_lock, 7589 argv); 7590 if (rc) { 7591 kfree(argv); 7592 err = -ENOMEM; 7593 goto out; 7594 } 7595 spin_lock(&fp->f_lock); 7596 list_add(&work->fp_entry, &fp->blocked_works); 7597 spin_unlock(&fp->f_lock); 7598 7599 smb2_send_interim_resp(work, STATUS_PENDING); 7600 7601 ksmbd_vfs_posix_lock_wait(flock); 7602 7603 spin_lock(&fp->f_lock); 7604 list_del(&work->fp_entry); 7605 spin_unlock(&fp->f_lock); 7606 7607 if (work->state != KSMBD_WORK_ACTIVE) { 7608 list_del(&smb_lock->llist); 7609 locks_free_lock(flock); 7610 7611 if (work->state == KSMBD_WORK_CANCELLED) { 7612 rsp->hdr.Status = 7613 STATUS_CANCELLED; 7614 kfree(smb_lock); 7615 smb2_send_interim_resp(work, 7616 STATUS_CANCELLED); 7617 work->send_no_response = 1; 7618 goto out; 7619 } 7620 7621 rsp->hdr.Status = 7622 STATUS_RANGE_NOT_LOCKED; 7623 kfree(smb_lock); 7624 goto out2; 7625 } 7626 7627 list_del(&smb_lock->llist); 7628 release_async_work(work); 7629 goto retry; 7630 } else if (!rc) { 7631 list_add(&smb_lock->llist, &rollback_list); 7632 spin_lock(&work->conn->llist_lock); 7633 list_add_tail(&smb_lock->clist, 7634 &work->conn->lock_list); 7635 list_add_tail(&smb_lock->flist, 7636 &fp->lock_list); 7637 spin_unlock(&work->conn->llist_lock); 7638 ksmbd_debug(SMB, "successful in taking lock\n"); 7639 } else { 7640 goto out; 7641 } 7642 } 7643 } 7644 7645 if (atomic_read(&fp->f_ci->op_count) > 1) 7646 smb_break_all_oplock(work, fp); 7647 7648 rsp->StructureSize = cpu_to_le16(4); 7649 ksmbd_debug(SMB, "successful in taking lock\n"); 7650 rsp->hdr.Status = STATUS_SUCCESS; 7651 rsp->Reserved = 0; 7652 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7653 if (err) 7654 goto out; 7655 7656 ksmbd_fd_put(work, fp); 7657 return 0; 7658 7659 out: 7660 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7661 locks_free_lock(smb_lock->fl); 7662 list_del(&smb_lock->llist); 7663 kfree(smb_lock); 7664 } 7665 7666 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7667 struct file_lock *rlock = NULL; 7668 7669 rlock = smb_flock_init(filp); 7670 rlock->c.flc_type = F_UNLCK; 7671 rlock->fl_start = smb_lock->start; 7672 rlock->fl_end = smb_lock->end; 7673 7674 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7675 if (rc) 7676 pr_err("rollback unlock fail : %d\n", rc); 7677 7678 list_del(&smb_lock->llist); 7679 spin_lock(&work->conn->llist_lock); 7680 if (!list_empty(&smb_lock->flist)) 7681 list_del(&smb_lock->flist); 7682 list_del(&smb_lock->clist); 7683 spin_unlock(&work->conn->llist_lock); 7684 7685 locks_free_lock(smb_lock->fl); 7686 locks_free_lock(rlock); 7687 kfree(smb_lock); 7688 } 7689 out2: 7690 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7691 7692 if (!rsp->hdr.Status) { 7693 if (err == -EINVAL) 7694 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7695 else if (err == -ENOMEM) 7696 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7697 else if (err == -ENOENT) 7698 rsp->hdr.Status = STATUS_FILE_CLOSED; 7699 else 7700 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7701 } 7702 7703 smb2_set_err_rsp(work); 7704 ksmbd_fd_put(work, fp); 7705 return err; 7706 } 7707 7708 static int fsctl_copychunk(struct ksmbd_work *work, 7709 struct copychunk_ioctl_req *ci_req, 7710 unsigned int cnt_code, 7711 unsigned int input_count, 7712 unsigned long long volatile_id, 7713 unsigned long long persistent_id, 7714 struct smb2_ioctl_rsp *rsp) 7715 { 7716 struct copychunk_ioctl_rsp *ci_rsp; 7717 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7718 struct srv_copychunk *chunks; 7719 unsigned int i, chunk_count, chunk_count_written = 0; 7720 unsigned int chunk_size_written = 0; 7721 loff_t total_size_written = 0; 7722 int ret = 0; 7723 7724 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7725 7726 rsp->VolatileFileId = volatile_id; 7727 rsp->PersistentFileId = persistent_id; 7728 ci_rsp->ChunksWritten = 7729 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7730 ci_rsp->ChunkBytesWritten = 7731 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7732 ci_rsp->TotalBytesWritten = 7733 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7734 7735 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7736 if (chunk_count == 0) 7737 goto out; 7738 total_size_written = 0; 7739 7740 /* verify the SRV_COPYCHUNK_COPY packet */ 7741 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7742 input_count < struct_size(ci_req, Chunks, chunk_count)) { 7743 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7744 return -EINVAL; 7745 } 7746 7747 chunks = &ci_req->Chunks[0]; 7748 for (i = 0; i < chunk_count; i++) { 7749 if (le32_to_cpu(chunks[i].Length) == 0 || 7750 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7751 break; 7752 total_size_written += le32_to_cpu(chunks[i].Length); 7753 } 7754 7755 if (i < chunk_count || 7756 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7757 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7758 return -EINVAL; 7759 } 7760 7761 src_fp = ksmbd_lookup_foreign_fd(work, 7762 le64_to_cpu(ci_req->SourceKeyU64[0])); 7763 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7764 ret = -EINVAL; 7765 if (!src_fp || 7766 src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) { 7767 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7768 goto out; 7769 } 7770 7771 if (!dst_fp) { 7772 rsp->hdr.Status = STATUS_FILE_CLOSED; 7773 goto out; 7774 } 7775 7776 /* 7777 * FILE_READ_DATA should only be included in 7778 * the FSCTL_COPYCHUNK case 7779 */ 7780 if (cnt_code == FSCTL_COPYCHUNK && 7781 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7782 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7783 goto out; 7784 } 7785 7786 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7787 chunks, chunk_count, 7788 &chunk_count_written, 7789 &chunk_size_written, 7790 &total_size_written); 7791 if (ret < 0) { 7792 if (ret == -EACCES) 7793 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7794 if (ret == -EAGAIN) 7795 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7796 else if (ret == -EBADF) 7797 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7798 else if (ret == -EFBIG || ret == -ENOSPC) 7799 rsp->hdr.Status = STATUS_DISK_FULL; 7800 else if (ret == -EINVAL) 7801 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7802 else if (ret == -EISDIR) 7803 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7804 else if (ret == -E2BIG) 7805 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7806 else 7807 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7808 } 7809 7810 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7811 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7812 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7813 out: 7814 ksmbd_fd_put(work, src_fp); 7815 ksmbd_fd_put(work, dst_fp); 7816 return ret; 7817 } 7818 7819 static __be32 idev_ipv4_address(struct in_device *idev) 7820 { 7821 __be32 addr = 0; 7822 7823 struct in_ifaddr *ifa; 7824 7825 rcu_read_lock(); 7826 in_dev_for_each_ifa_rcu(ifa, idev) { 7827 if (ifa->ifa_flags & IFA_F_SECONDARY) 7828 continue; 7829 7830 addr = ifa->ifa_address; 7831 break; 7832 } 7833 rcu_read_unlock(); 7834 return addr; 7835 } 7836 7837 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7838 struct smb2_ioctl_rsp *rsp, 7839 unsigned int out_buf_len) 7840 { 7841 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7842 int nbytes = 0; 7843 struct net_device *netdev; 7844 struct sockaddr_storage_rsp *sockaddr_storage; 7845 unsigned int flags; 7846 unsigned long long speed; 7847 7848 rtnl_lock(); 7849 for_each_netdev(&init_net, netdev) { 7850 bool ipv4_set = false; 7851 7852 if (netdev->type == ARPHRD_LOOPBACK) 7853 continue; 7854 7855 if (!ksmbd_find_netdev_name_iface_list(netdev->name)) 7856 continue; 7857 7858 flags = netif_get_flags(netdev); 7859 if (!(flags & IFF_RUNNING)) 7860 continue; 7861 ipv6_retry: 7862 if (out_buf_len < 7863 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7864 rtnl_unlock(); 7865 return -ENOSPC; 7866 } 7867 7868 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7869 &rsp->Buffer[nbytes]; 7870 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7871 7872 nii_rsp->Capability = 0; 7873 if (netdev->real_num_tx_queues > 1) 7874 nii_rsp->Capability |= RSS_CAPABLE; 7875 if (ksmbd_rdma_capable_netdev(netdev)) 7876 nii_rsp->Capability |= RDMA_CAPABLE; 7877 7878 nii_rsp->Next = cpu_to_le32(152); 7879 nii_rsp->Reserved = 0; 7880 7881 if (netdev->ethtool_ops->get_link_ksettings) { 7882 struct ethtool_link_ksettings cmd; 7883 7884 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7885 speed = cmd.base.speed; 7886 } else { 7887 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7888 "speed is unknown, defaulting to 1Gb/sec"); 7889 speed = SPEED_1000; 7890 } 7891 7892 speed *= 1000000; 7893 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7894 7895 sockaddr_storage = (struct sockaddr_storage_rsp *) 7896 nii_rsp->SockAddr_Storage; 7897 memset(sockaddr_storage, 0, 128); 7898 7899 if (!ipv4_set) { 7900 struct in_device *idev; 7901 7902 sockaddr_storage->Family = INTERNETWORK; 7903 sockaddr_storage->addr4.Port = 0; 7904 7905 idev = __in_dev_get_rtnl(netdev); 7906 if (!idev) 7907 continue; 7908 sockaddr_storage->addr4.IPv4Address = 7909 idev_ipv4_address(idev); 7910 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7911 ipv4_set = true; 7912 goto ipv6_retry; 7913 } else { 7914 struct inet6_dev *idev6; 7915 struct inet6_ifaddr *ifa; 7916 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6Address; 7917 7918 sockaddr_storage->Family = INTERNETWORKV6; 7919 sockaddr_storage->addr6.Port = 0; 7920 sockaddr_storage->addr6.FlowInfo = 0; 7921 7922 idev6 = __in6_dev_get(netdev); 7923 if (!idev6) 7924 continue; 7925 7926 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7927 if (ifa->flags & (IFA_F_TENTATIVE | 7928 IFA_F_DEPRECATED)) 7929 continue; 7930 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7931 break; 7932 } 7933 sockaddr_storage->addr6.ScopeId = 0; 7934 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7935 } 7936 } 7937 rtnl_unlock(); 7938 7939 /* zero if this is last one */ 7940 if (nii_rsp) 7941 nii_rsp->Next = 0; 7942 7943 rsp->PersistentFileId = SMB2_NO_FID; 7944 rsp->VolatileFileId = SMB2_NO_FID; 7945 return nbytes; 7946 } 7947 7948 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7949 struct validate_negotiate_info_req *neg_req, 7950 struct validate_negotiate_info_rsp *neg_rsp, 7951 unsigned int in_buf_len) 7952 { 7953 int ret = 0; 7954 int dialect; 7955 7956 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7957 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7958 return -EINVAL; 7959 7960 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7961 neg_req->DialectCount); 7962 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7963 ret = -EINVAL; 7964 goto err_out; 7965 } 7966 7967 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7968 ret = -EINVAL; 7969 goto err_out; 7970 } 7971 7972 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7973 ret = -EINVAL; 7974 goto err_out; 7975 } 7976 7977 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7978 ret = -EINVAL; 7979 goto err_out; 7980 } 7981 7982 neg_rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 7983 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 7984 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 7985 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 7986 err_out: 7987 return ret; 7988 } 7989 7990 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 7991 struct file_allocated_range_buffer *qar_req, 7992 struct file_allocated_range_buffer *qar_rsp, 7993 unsigned int in_count, unsigned int *out_count) 7994 { 7995 struct ksmbd_file *fp; 7996 loff_t start, length; 7997 int ret = 0; 7998 7999 *out_count = 0; 8000 if (in_count == 0) 8001 return -EINVAL; 8002 8003 start = le64_to_cpu(qar_req->file_offset); 8004 length = le64_to_cpu(qar_req->length); 8005 8006 if (start < 0 || length < 0) 8007 return -EINVAL; 8008 8009 fp = ksmbd_lookup_fd_fast(work, id); 8010 if (!fp) 8011 return -ENOENT; 8012 8013 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 8014 qar_rsp, in_count, out_count); 8015 if (ret && ret != -E2BIG) 8016 *out_count = 0; 8017 8018 ksmbd_fd_put(work, fp); 8019 return ret; 8020 } 8021 8022 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 8023 unsigned int out_buf_len, 8024 struct smb2_ioctl_req *req, 8025 struct smb2_ioctl_rsp *rsp) 8026 { 8027 struct ksmbd_rpc_command *rpc_resp; 8028 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); 8029 int nbytes = 0; 8030 8031 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 8032 le32_to_cpu(req->InputCount)); 8033 if (rpc_resp) { 8034 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 8035 /* 8036 * set STATUS_SOME_NOT_MAPPED response 8037 * for unknown domain sid. 8038 */ 8039 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 8040 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 8041 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8042 goto out; 8043 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 8044 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8045 goto out; 8046 } 8047 8048 nbytes = rpc_resp->payload_sz; 8049 if (rpc_resp->payload_sz > out_buf_len) { 8050 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8051 nbytes = out_buf_len; 8052 } 8053 8054 if (!rpc_resp->payload_sz) { 8055 rsp->hdr.Status = 8056 STATUS_UNEXPECTED_IO_ERROR; 8057 goto out; 8058 } 8059 8060 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 8061 } 8062 out: 8063 kvfree(rpc_resp); 8064 return nbytes; 8065 } 8066 8067 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 8068 struct file_sparse *sparse) 8069 { 8070 struct ksmbd_file *fp; 8071 struct mnt_idmap *idmap; 8072 int ret = 0; 8073 __le32 old_fattr; 8074 8075 fp = ksmbd_lookup_fd_fast(work, id); 8076 if (!fp) 8077 return -ENOENT; 8078 idmap = file_mnt_idmap(fp->filp); 8079 8080 old_fattr = fp->f_ci->m_fattr; 8081 if (sparse->SetSparse) 8082 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 8083 else 8084 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 8085 8086 if (fp->f_ci->m_fattr != old_fattr && 8087 test_share_config_flag(work->tcon->share_conf, 8088 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 8089 struct xattr_dos_attrib da; 8090 8091 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 8092 fp->filp->f_path.dentry, &da); 8093 if (ret <= 0) 8094 goto out; 8095 8096 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 8097 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 8098 &fp->filp->f_path, 8099 &da, true); 8100 if (ret) 8101 fp->f_ci->m_fattr = old_fattr; 8102 } 8103 8104 out: 8105 ksmbd_fd_put(work, fp); 8106 return ret; 8107 } 8108 8109 static int fsctl_request_resume_key(struct ksmbd_work *work, 8110 struct smb2_ioctl_req *req, 8111 struct resume_key_ioctl_rsp *key_rsp) 8112 { 8113 struct ksmbd_file *fp; 8114 8115 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 8116 if (!fp) 8117 return -ENOENT; 8118 8119 memset(key_rsp, 0, sizeof(*key_rsp)); 8120 key_rsp->ResumeKeyU64[0] = req->VolatileFileId; 8121 key_rsp->ResumeKeyU64[1] = req->PersistentFileId; 8122 ksmbd_fd_put(work, fp); 8123 8124 return 0; 8125 } 8126 8127 /** 8128 * smb2_ioctl() - handler for smb2 ioctl command 8129 * @work: smb work containing ioctl command buffer 8130 * 8131 * Return: 0 on success, otherwise error 8132 */ 8133 int smb2_ioctl(struct ksmbd_work *work) 8134 { 8135 struct smb2_ioctl_req *req; 8136 struct smb2_ioctl_rsp *rsp; 8137 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 8138 u64 id = KSMBD_NO_FID; 8139 struct ksmbd_conn *conn = work->conn; 8140 int ret = 0; 8141 char *buffer; 8142 8143 ksmbd_debug(SMB, "Received smb2 ioctl request\n"); 8144 8145 if (work->next_smb2_rcv_hdr_off) { 8146 req = ksmbd_req_buf_next(work); 8147 rsp = ksmbd_resp_buf_next(work); 8148 if (!has_file_id(req->VolatileFileId)) { 8149 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 8150 work->compound_fid); 8151 id = work->compound_fid; 8152 } 8153 } else { 8154 req = smb2_get_msg(work->request_buf); 8155 rsp = smb2_get_msg(work->response_buf); 8156 } 8157 8158 if (!has_file_id(id)) 8159 id = req->VolatileFileId; 8160 8161 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 8162 ret = -EOPNOTSUPP; 8163 goto out; 8164 } 8165 8166 buffer = (char *)req + le32_to_cpu(req->InputOffset); 8167 8168 cnt_code = le32_to_cpu(req->CtlCode); 8169 ret = smb2_calc_max_out_buf_len(work, 48, 8170 le32_to_cpu(req->MaxOutputResponse)); 8171 if (ret < 0) { 8172 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8173 goto out; 8174 } 8175 out_buf_len = (unsigned int)ret; 8176 in_buf_len = le32_to_cpu(req->InputCount); 8177 8178 switch (cnt_code) { 8179 case FSCTL_DFS_GET_REFERRALS: 8180 case FSCTL_DFS_GET_REFERRALS_EX: 8181 /* Not support DFS yet */ 8182 ret = -EOPNOTSUPP; 8183 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 8184 goto out2; 8185 case FSCTL_CREATE_OR_GET_OBJECT_ID: 8186 { 8187 struct file_object_buf_type1_ioctl_rsp *obj_buf; 8188 8189 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 8190 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 8191 &rsp->Buffer[0]; 8192 8193 /* 8194 * TODO: This is dummy implementation to pass smbtorture 8195 * Need to check correct response later 8196 */ 8197 memset(obj_buf->ObjectId, 0x0, 16); 8198 memset(obj_buf->BirthVolumeId, 0x0, 16); 8199 memset(obj_buf->BirthObjectId, 0x0, 16); 8200 memset(obj_buf->DomainId, 0x0, 16); 8201 8202 break; 8203 } 8204 case FSCTL_PIPE_TRANSCEIVE: 8205 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 8206 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 8207 break; 8208 case FSCTL_VALIDATE_NEGOTIATE_INFO: 8209 if (conn->dialect < SMB30_PROT_ID) { 8210 ret = -EOPNOTSUPP; 8211 goto out; 8212 } 8213 8214 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 8215 Dialects)) { 8216 ret = -EINVAL; 8217 goto out; 8218 } 8219 8220 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 8221 ret = -EINVAL; 8222 goto out; 8223 } 8224 8225 ret = fsctl_validate_negotiate_info(conn, 8226 (struct validate_negotiate_info_req *)buffer, 8227 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 8228 in_buf_len); 8229 if (ret < 0) 8230 goto out; 8231 8232 nbytes = sizeof(struct validate_negotiate_info_rsp); 8233 rsp->PersistentFileId = SMB2_NO_FID; 8234 rsp->VolatileFileId = SMB2_NO_FID; 8235 break; 8236 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 8237 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 8238 if (ret < 0) 8239 goto out; 8240 nbytes = ret; 8241 break; 8242 case FSCTL_REQUEST_RESUME_KEY: 8243 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 8244 ret = -EINVAL; 8245 goto out; 8246 } 8247 8248 ret = fsctl_request_resume_key(work, req, 8249 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 8250 if (ret < 0) 8251 goto out; 8252 rsp->PersistentFileId = req->PersistentFileId; 8253 rsp->VolatileFileId = req->VolatileFileId; 8254 nbytes = sizeof(struct resume_key_ioctl_rsp); 8255 break; 8256 case FSCTL_COPYCHUNK: 8257 case FSCTL_COPYCHUNK_WRITE: 8258 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8259 ksmbd_debug(SMB, 8260 "User does not have write permission\n"); 8261 ret = -EACCES; 8262 goto out; 8263 } 8264 8265 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) { 8266 ret = -EINVAL; 8267 goto out; 8268 } 8269 8270 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 8271 ret = -EINVAL; 8272 goto out; 8273 } 8274 8275 nbytes = sizeof(struct copychunk_ioctl_rsp); 8276 rsp->VolatileFileId = req->VolatileFileId; 8277 rsp->PersistentFileId = req->PersistentFileId; 8278 fsctl_copychunk(work, 8279 (struct copychunk_ioctl_req *)buffer, 8280 le32_to_cpu(req->CtlCode), 8281 le32_to_cpu(req->InputCount), 8282 req->VolatileFileId, 8283 req->PersistentFileId, 8284 rsp); 8285 break; 8286 case FSCTL_SET_SPARSE: 8287 if (in_buf_len < sizeof(struct file_sparse)) { 8288 ret = -EINVAL; 8289 goto out; 8290 } 8291 8292 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); 8293 if (ret < 0) 8294 goto out; 8295 break; 8296 case FSCTL_SET_ZERO_DATA: 8297 { 8298 struct file_zero_data_information *zero_data; 8299 struct ksmbd_file *fp; 8300 loff_t off, len, bfz; 8301 8302 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8303 ksmbd_debug(SMB, 8304 "User does not have write permission\n"); 8305 ret = -EACCES; 8306 goto out; 8307 } 8308 8309 if (in_buf_len < sizeof(struct file_zero_data_information)) { 8310 ret = -EINVAL; 8311 goto out; 8312 } 8313 8314 zero_data = 8315 (struct file_zero_data_information *)buffer; 8316 8317 off = le64_to_cpu(zero_data->FileOffset); 8318 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 8319 if (off < 0 || bfz < 0 || off > bfz) { 8320 ret = -EINVAL; 8321 goto out; 8322 } 8323 8324 len = bfz - off; 8325 if (len) { 8326 fp = ksmbd_lookup_fd_fast(work, id); 8327 if (!fp) { 8328 ret = -ENOENT; 8329 goto out; 8330 } 8331 8332 ret = ksmbd_vfs_zero_data(work, fp, off, len); 8333 ksmbd_fd_put(work, fp); 8334 if (ret < 0) 8335 goto out; 8336 } 8337 break; 8338 } 8339 case FSCTL_QUERY_ALLOCATED_RANGES: 8340 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 8341 ret = -EINVAL; 8342 goto out; 8343 } 8344 8345 ret = fsctl_query_allocated_ranges(work, id, 8346 (struct file_allocated_range_buffer *)buffer, 8347 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 8348 out_buf_len / 8349 sizeof(struct file_allocated_range_buffer), &nbytes); 8350 if (ret == -E2BIG) { 8351 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8352 } else if (ret < 0) { 8353 nbytes = 0; 8354 goto out; 8355 } 8356 8357 nbytes *= sizeof(struct file_allocated_range_buffer); 8358 break; 8359 case FSCTL_GET_REPARSE_POINT: 8360 { 8361 struct reparse_data_buffer *reparse_ptr; 8362 struct ksmbd_file *fp; 8363 8364 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 8365 fp = ksmbd_lookup_fd_fast(work, id); 8366 if (!fp) { 8367 pr_err("not found fp!!\n"); 8368 ret = -ENOENT; 8369 goto out; 8370 } 8371 8372 reparse_ptr->ReparseTag = 8373 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 8374 reparse_ptr->ReparseDataLength = 0; 8375 ksmbd_fd_put(work, fp); 8376 nbytes = sizeof(struct reparse_data_buffer); 8377 break; 8378 } 8379 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 8380 { 8381 struct ksmbd_file *fp_in, *fp_out = NULL; 8382 struct duplicate_extents_to_file *dup_ext; 8383 loff_t src_off, dst_off, length, cloned; 8384 8385 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 8386 ret = -EINVAL; 8387 goto out; 8388 } 8389 8390 dup_ext = (struct duplicate_extents_to_file *)buffer; 8391 8392 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 8393 dup_ext->PersistentFileHandle); 8394 if (!fp_in) { 8395 pr_err("not found file handle in duplicate extent to file\n"); 8396 ret = -ENOENT; 8397 goto out; 8398 } 8399 8400 fp_out = ksmbd_lookup_fd_fast(work, id); 8401 if (!fp_out) { 8402 pr_err("not found fp\n"); 8403 ret = -ENOENT; 8404 goto dup_ext_out; 8405 } 8406 8407 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 8408 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 8409 length = le64_to_cpu(dup_ext->ByteCount); 8410 /* 8411 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 8412 * should fall back to vfs_copy_file_range(). This could be 8413 * beneficial when re-exporting nfs/smb mount, but note that 8414 * this can result in partial copy that returns an error status. 8415 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 8416 * fall back to vfs_copy_file_range(), should be avoided when 8417 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 8418 */ 8419 cloned = vfs_clone_file_range(fp_in->filp, src_off, 8420 fp_out->filp, dst_off, length, 0); 8421 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 8422 ret = -EOPNOTSUPP; 8423 goto dup_ext_out; 8424 } else if (cloned != length) { 8425 cloned = vfs_copy_file_range(fp_in->filp, src_off, 8426 fp_out->filp, dst_off, 8427 length, 0); 8428 if (cloned != length) { 8429 if (cloned < 0) 8430 ret = cloned; 8431 else 8432 ret = -EINVAL; 8433 } 8434 } 8435 8436 dup_ext_out: 8437 ksmbd_fd_put(work, fp_in); 8438 ksmbd_fd_put(work, fp_out); 8439 if (ret < 0) 8440 goto out; 8441 break; 8442 } 8443 default: 8444 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 8445 cnt_code); 8446 ret = -EOPNOTSUPP; 8447 goto out; 8448 } 8449 8450 rsp->CtlCode = cpu_to_le32(cnt_code); 8451 rsp->InputCount = cpu_to_le32(0); 8452 rsp->InputOffset = cpu_to_le32(112); 8453 rsp->OutputOffset = cpu_to_le32(112); 8454 rsp->OutputCount = cpu_to_le32(nbytes); 8455 rsp->StructureSize = cpu_to_le16(49); 8456 rsp->Reserved = cpu_to_le16(0); 8457 rsp->Flags = cpu_to_le32(0); 8458 rsp->Reserved2 = cpu_to_le32(0); 8459 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 8460 if (!ret) 8461 return ret; 8462 8463 out: 8464 if (ret == -EACCES) 8465 rsp->hdr.Status = STATUS_ACCESS_DENIED; 8466 else if (ret == -ENOENT) 8467 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 8468 else if (ret == -EOPNOTSUPP) 8469 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8470 else if (ret == -ENOSPC) 8471 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 8472 else if (ret < 0 || rsp->hdr.Status == 0) 8473 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8474 8475 out2: 8476 smb2_set_err_rsp(work); 8477 return ret; 8478 } 8479 8480 /** 8481 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 8482 * @work: smb work containing oplock break command buffer 8483 * 8484 * Return: 0 8485 */ 8486 static void smb20_oplock_break_ack(struct ksmbd_work *work) 8487 { 8488 struct smb2_oplock_break *req; 8489 struct smb2_oplock_break *rsp; 8490 struct ksmbd_file *fp; 8491 struct oplock_info *opinfo = NULL; 8492 __le32 err = 0; 8493 int ret = 0; 8494 u64 volatile_id, persistent_id; 8495 char req_oplevel = 0, rsp_oplevel = 0; 8496 unsigned int oplock_change_type; 8497 8498 WORK_BUFFERS(work, req, rsp); 8499 8500 volatile_id = req->VolatileFid; 8501 persistent_id = req->PersistentFid; 8502 req_oplevel = req->OplockLevel; 8503 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8504 volatile_id, persistent_id, req_oplevel); 8505 8506 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8507 if (!fp) { 8508 rsp->hdr.Status = STATUS_FILE_CLOSED; 8509 smb2_set_err_rsp(work); 8510 return; 8511 } 8512 8513 opinfo = opinfo_get(fp); 8514 if (!opinfo) { 8515 pr_err("unexpected null oplock_info\n"); 8516 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8517 smb2_set_err_rsp(work); 8518 ksmbd_fd_put(work, fp); 8519 return; 8520 } 8521 8522 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8523 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8524 goto err_out; 8525 } 8526 8527 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8528 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8529 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8530 goto err_out; 8531 } 8532 8533 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8534 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8535 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8536 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8537 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8538 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8539 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8540 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8541 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8542 oplock_change_type = OPLOCK_READ_TO_NONE; 8543 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8544 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8545 err = STATUS_INVALID_DEVICE_STATE; 8546 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8547 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8548 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8549 oplock_change_type = OPLOCK_WRITE_TO_READ; 8550 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8551 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8552 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8553 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8554 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8555 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8556 oplock_change_type = OPLOCK_READ_TO_NONE; 8557 } else { 8558 oplock_change_type = 0; 8559 } 8560 } else { 8561 oplock_change_type = 0; 8562 } 8563 8564 switch (oplock_change_type) { 8565 case OPLOCK_WRITE_TO_READ: 8566 ret = opinfo_write_to_read(opinfo); 8567 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8568 break; 8569 case OPLOCK_WRITE_TO_NONE: 8570 ret = opinfo_write_to_none(opinfo); 8571 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8572 break; 8573 case OPLOCK_READ_TO_NONE: 8574 ret = opinfo_read_to_none(opinfo); 8575 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8576 break; 8577 default: 8578 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8579 opinfo->level, rsp_oplevel); 8580 } 8581 8582 if (ret < 0) { 8583 rsp->hdr.Status = err; 8584 goto err_out; 8585 } 8586 8587 rsp->StructureSize = cpu_to_le16(24); 8588 rsp->OplockLevel = rsp_oplevel; 8589 rsp->Reserved = 0; 8590 rsp->Reserved2 = 0; 8591 rsp->VolatileFid = volatile_id; 8592 rsp->PersistentFid = persistent_id; 8593 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8594 if (ret) { 8595 err_out: 8596 smb2_set_err_rsp(work); 8597 } 8598 8599 opinfo->op_state = OPLOCK_STATE_NONE; 8600 wake_up_interruptible_all(&opinfo->oplock_q); 8601 opinfo_put(opinfo); 8602 ksmbd_fd_put(work, fp); 8603 } 8604 8605 static int check_lease_state(struct lease *lease, __le32 req_state) 8606 { 8607 if ((lease->new_state == 8608 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8609 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8610 lease->new_state = req_state; 8611 return 0; 8612 } 8613 8614 if (lease->new_state == req_state) 8615 return 0; 8616 8617 return 1; 8618 } 8619 8620 /** 8621 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8622 * @work: smb work containing lease break command buffer 8623 * 8624 * Return: 0 8625 */ 8626 static void smb21_lease_break_ack(struct ksmbd_work *work) 8627 { 8628 struct ksmbd_conn *conn = work->conn; 8629 struct smb2_lease_ack *req; 8630 struct smb2_lease_ack *rsp; 8631 struct oplock_info *opinfo; 8632 __le32 err = 0; 8633 int ret = 0; 8634 unsigned int lease_change_type; 8635 __le32 lease_state; 8636 struct lease *lease; 8637 8638 WORK_BUFFERS(work, req, rsp); 8639 8640 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8641 le32_to_cpu(req->LeaseState)); 8642 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8643 if (!opinfo) { 8644 ksmbd_debug(OPLOCK, "file not opened\n"); 8645 smb2_set_err_rsp(work); 8646 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8647 return; 8648 } 8649 lease = opinfo->o_lease; 8650 8651 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8652 pr_err("unexpected lease break state 0x%x\n", 8653 opinfo->op_state); 8654 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8655 goto err_out; 8656 } 8657 8658 if (check_lease_state(lease, req->LeaseState)) { 8659 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8660 ksmbd_debug(OPLOCK, 8661 "req lease state: 0x%x, expected state: 0x%x\n", 8662 req->LeaseState, lease->new_state); 8663 goto err_out; 8664 } 8665 8666 if (!atomic_read(&opinfo->breaking_cnt)) { 8667 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8668 goto err_out; 8669 } 8670 8671 /* check for bad lease state */ 8672 if (req->LeaseState & 8673 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8674 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8675 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8676 lease_change_type = OPLOCK_WRITE_TO_NONE; 8677 else 8678 lease_change_type = OPLOCK_READ_TO_NONE; 8679 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8680 le32_to_cpu(lease->state), 8681 le32_to_cpu(req->LeaseState)); 8682 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8683 req->LeaseState != SMB2_LEASE_NONE_LE) { 8684 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8685 lease_change_type = OPLOCK_READ_TO_NONE; 8686 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8687 le32_to_cpu(lease->state), 8688 le32_to_cpu(req->LeaseState)); 8689 } else { 8690 /* valid lease state changes */ 8691 err = STATUS_INVALID_DEVICE_STATE; 8692 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8693 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8694 lease_change_type = OPLOCK_WRITE_TO_NONE; 8695 else 8696 lease_change_type = OPLOCK_READ_TO_NONE; 8697 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8698 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8699 lease_change_type = OPLOCK_WRITE_TO_READ; 8700 else 8701 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8702 } else { 8703 lease_change_type = 0; 8704 } 8705 } 8706 8707 switch (lease_change_type) { 8708 case OPLOCK_WRITE_TO_READ: 8709 ret = opinfo_write_to_read(opinfo); 8710 break; 8711 case OPLOCK_READ_HANDLE_TO_READ: 8712 ret = opinfo_read_handle_to_read(opinfo); 8713 break; 8714 case OPLOCK_WRITE_TO_NONE: 8715 ret = opinfo_write_to_none(opinfo); 8716 break; 8717 case OPLOCK_READ_TO_NONE: 8718 ret = opinfo_read_to_none(opinfo); 8719 break; 8720 default: 8721 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8722 le32_to_cpu(lease->state), 8723 le32_to_cpu(req->LeaseState)); 8724 } 8725 8726 if (ret < 0) { 8727 rsp->hdr.Status = err; 8728 goto err_out; 8729 } 8730 8731 lease_state = lease->state; 8732 8733 rsp->StructureSize = cpu_to_le16(36); 8734 rsp->Reserved = 0; 8735 rsp->Flags = 0; 8736 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8737 rsp->LeaseState = lease_state; 8738 rsp->LeaseDuration = 0; 8739 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8740 if (ret) { 8741 err_out: 8742 smb2_set_err_rsp(work); 8743 } 8744 8745 opinfo->op_state = OPLOCK_STATE_NONE; 8746 wake_up_interruptible_all(&opinfo->oplock_q); 8747 atomic_dec(&opinfo->breaking_cnt); 8748 wake_up_interruptible_all(&opinfo->oplock_brk); 8749 opinfo_put(opinfo); 8750 } 8751 8752 /** 8753 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8754 * @work: smb work containing oplock/lease break command buffer 8755 * 8756 * Return: 0 on success, otherwise error 8757 */ 8758 int smb2_oplock_break(struct ksmbd_work *work) 8759 { 8760 struct smb2_oplock_break *req; 8761 struct smb2_oplock_break *rsp; 8762 8763 ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n"); 8764 8765 WORK_BUFFERS(work, req, rsp); 8766 8767 switch (le16_to_cpu(req->StructureSize)) { 8768 case OP_BREAK_STRUCT_SIZE_20: 8769 smb20_oplock_break_ack(work); 8770 break; 8771 case OP_BREAK_STRUCT_SIZE_21: 8772 smb21_lease_break_ack(work); 8773 break; 8774 default: 8775 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8776 le16_to_cpu(req->StructureSize)); 8777 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8778 smb2_set_err_rsp(work); 8779 return -EINVAL; 8780 } 8781 8782 return 0; 8783 } 8784 8785 /** 8786 * smb2_notify() - handler for smb2 notify request 8787 * @work: smb work containing notify command buffer 8788 * 8789 * Return: 0 on success, otherwise error 8790 */ 8791 int smb2_notify(struct ksmbd_work *work) 8792 { 8793 struct smb2_change_notify_req *req; 8794 struct smb2_change_notify_rsp *rsp; 8795 8796 ksmbd_debug(SMB, "Received smb2 notify\n"); 8797 8798 WORK_BUFFERS(work, req, rsp); 8799 8800 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8801 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8802 smb2_set_err_rsp(work); 8803 return -EIO; 8804 } 8805 8806 smb2_set_err_rsp(work); 8807 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8808 return -EOPNOTSUPP; 8809 } 8810 8811 /** 8812 * smb2_is_sign_req() - handler for checking packet signing status 8813 * @work: smb work containing notify command buffer 8814 * @command: SMB2 command id 8815 * 8816 * Return: true if packed is signed, false otherwise 8817 */ 8818 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8819 { 8820 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); 8821 8822 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8823 command != SMB2_NEGOTIATE_HE && 8824 command != SMB2_SESSION_SETUP_HE && 8825 command != SMB2_OPLOCK_BREAK_HE) 8826 return true; 8827 8828 return false; 8829 } 8830 8831 /** 8832 * smb2_check_sign_req() - handler for req packet sign processing 8833 * @work: smb work containing notify command buffer 8834 * 8835 * Return: 1 on success, 0 otherwise 8836 */ 8837 int smb2_check_sign_req(struct ksmbd_work *work) 8838 { 8839 struct smb2_hdr *hdr; 8840 char signature_req[SMB2_SIGNATURE_SIZE]; 8841 char signature[SMB2_HMACSHA256_SIZE]; 8842 struct kvec iov[1]; 8843 size_t len; 8844 8845 hdr = smb2_get_msg(work->request_buf); 8846 if (work->next_smb2_rcv_hdr_off) 8847 hdr = ksmbd_req_buf_next(work); 8848 8849 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8850 len = get_rfc1002_len(work->request_buf); 8851 else if (hdr->NextCommand) 8852 len = le32_to_cpu(hdr->NextCommand); 8853 else 8854 len = get_rfc1002_len(work->request_buf) - 8855 work->next_smb2_rcv_hdr_off; 8856 8857 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8858 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8859 8860 iov[0].iov_base = (char *)&hdr->ProtocolId; 8861 iov[0].iov_len = len; 8862 8863 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8864 signature); 8865 8866 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8867 pr_err("bad smb2 signature\n"); 8868 return 0; 8869 } 8870 8871 return 1; 8872 } 8873 8874 /** 8875 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8876 * @work: smb work containing notify command buffer 8877 * 8878 */ 8879 void smb2_set_sign_rsp(struct ksmbd_work *work) 8880 { 8881 struct smb2_hdr *hdr; 8882 char signature[SMB2_HMACSHA256_SIZE]; 8883 struct kvec *iov; 8884 int n_vec = 1; 8885 8886 hdr = ksmbd_resp_buf_curr(work); 8887 hdr->Flags |= SMB2_FLAGS_SIGNED; 8888 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8889 8890 if (hdr->Command == SMB2_READ) { 8891 iov = &work->iov[work->iov_idx - 1]; 8892 n_vec++; 8893 } else { 8894 iov = &work->iov[work->iov_idx]; 8895 } 8896 8897 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8898 signature); 8899 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8900 } 8901 8902 /** 8903 * smb3_check_sign_req() - handler for req packet sign processing 8904 * @work: smb work containing notify command buffer 8905 * 8906 * Return: 1 on success, 0 otherwise 8907 */ 8908 int smb3_check_sign_req(struct ksmbd_work *work) 8909 { 8910 struct ksmbd_conn *conn = work->conn; 8911 char *signing_key; 8912 struct smb2_hdr *hdr; 8913 struct channel *chann; 8914 char signature_req[SMB2_SIGNATURE_SIZE]; 8915 char signature[SMB2_CMACAES_SIZE]; 8916 struct kvec iov[1]; 8917 size_t len; 8918 8919 hdr = smb2_get_msg(work->request_buf); 8920 if (work->next_smb2_rcv_hdr_off) 8921 hdr = ksmbd_req_buf_next(work); 8922 8923 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8924 len = get_rfc1002_len(work->request_buf); 8925 else if (hdr->NextCommand) 8926 len = le32_to_cpu(hdr->NextCommand); 8927 else 8928 len = get_rfc1002_len(work->request_buf) - 8929 work->next_smb2_rcv_hdr_off; 8930 8931 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8932 signing_key = work->sess->smb3signingkey; 8933 } else { 8934 chann = lookup_chann_list(work->sess, conn); 8935 if (!chann) { 8936 return 0; 8937 } 8938 signing_key = chann->smb3signingkey; 8939 } 8940 8941 if (!signing_key) { 8942 pr_err("SMB3 signing key is not generated\n"); 8943 return 0; 8944 } 8945 8946 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8947 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8948 iov[0].iov_base = (char *)&hdr->ProtocolId; 8949 iov[0].iov_len = len; 8950 8951 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8952 return 0; 8953 8954 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8955 pr_err("bad smb2 signature\n"); 8956 return 0; 8957 } 8958 8959 return 1; 8960 } 8961 8962 /** 8963 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8964 * @work: smb work containing notify command buffer 8965 * 8966 */ 8967 void smb3_set_sign_rsp(struct ksmbd_work *work) 8968 { 8969 struct ksmbd_conn *conn = work->conn; 8970 struct smb2_hdr *hdr; 8971 struct channel *chann; 8972 char signature[SMB2_CMACAES_SIZE]; 8973 struct kvec *iov; 8974 int n_vec = 1; 8975 char *signing_key; 8976 8977 hdr = ksmbd_resp_buf_curr(work); 8978 8979 if (conn->binding == false && 8980 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8981 signing_key = work->sess->smb3signingkey; 8982 } else { 8983 chann = lookup_chann_list(work->sess, work->conn); 8984 if (!chann) { 8985 return; 8986 } 8987 signing_key = chann->smb3signingkey; 8988 } 8989 8990 if (!signing_key) 8991 return; 8992 8993 hdr->Flags |= SMB2_FLAGS_SIGNED; 8994 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8995 8996 if (hdr->Command == SMB2_READ) { 8997 iov = &work->iov[work->iov_idx - 1]; 8998 n_vec++; 8999 } else { 9000 iov = &work->iov[work->iov_idx]; 9001 } 9002 9003 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 9004 signature)) 9005 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9006 } 9007 9008 /** 9009 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 9010 * @work: smb work containing response buffer 9011 * 9012 */ 9013 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 9014 { 9015 struct ksmbd_conn *conn = work->conn; 9016 struct ksmbd_session *sess = work->sess; 9017 struct smb2_hdr *req, *rsp; 9018 9019 if (conn->dialect != SMB311_PROT_ID) 9020 return; 9021 9022 WORK_BUFFERS(work, req, rsp); 9023 9024 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 9025 conn->preauth_info) 9026 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9027 conn->preauth_info->Preauth_HashValue); 9028 9029 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 9030 __u8 *hash_value; 9031 9032 if (conn->binding) { 9033 struct preauth_session *preauth_sess; 9034 9035 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 9036 if (!preauth_sess) 9037 return; 9038 hash_value = preauth_sess->Preauth_HashValue; 9039 } else { 9040 hash_value = sess->Preauth_HashValue; 9041 if (!hash_value) 9042 return; 9043 } 9044 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9045 hash_value); 9046 } 9047 } 9048 9049 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 9050 { 9051 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 9052 struct smb2_hdr *hdr = smb2_get_msg(old_buf); 9053 unsigned int orig_len = get_rfc1002_len(old_buf); 9054 9055 /* tr_buf must be cleared by the caller */ 9056 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 9057 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 9058 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 9059 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 9060 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 9061 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 9062 else 9063 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 9064 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 9065 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 9066 inc_rfc1001_len(tr_buf, orig_len); 9067 } 9068 9069 int smb3_encrypt_resp(struct ksmbd_work *work) 9070 { 9071 struct kvec *iov = work->iov; 9072 int rc = -ENOMEM; 9073 void *tr_buf; 9074 9075 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP); 9076 if (!tr_buf) 9077 return rc; 9078 9079 /* fill transform header */ 9080 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 9081 9082 iov[0].iov_base = tr_buf; 9083 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9084 work->tr_buf = tr_buf; 9085 9086 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 9087 } 9088 9089 bool smb3_is_transform_hdr(void *buf) 9090 { 9091 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); 9092 9093 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 9094 } 9095 9096 int smb3_decrypt_req(struct ksmbd_work *work) 9097 { 9098 struct ksmbd_session *sess; 9099 char *buf = work->request_buf; 9100 unsigned int pdu_length = get_rfc1002_len(buf); 9101 struct kvec iov[2]; 9102 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 9103 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); 9104 int rc = 0; 9105 9106 if (pdu_length < sizeof(struct smb2_transform_hdr) || 9107 buf_data_size < sizeof(struct smb2_hdr)) { 9108 pr_err("Transform message is too small (%u)\n", 9109 pdu_length); 9110 return -ECONNABORTED; 9111 } 9112 9113 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 9114 pr_err("Transform message is broken\n"); 9115 return -ECONNABORTED; 9116 } 9117 9118 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 9119 if (!sess) { 9120 pr_err("invalid session id(%llx) in transform header\n", 9121 le64_to_cpu(tr_hdr->SessionId)); 9122 return -ECONNABORTED; 9123 } 9124 ksmbd_user_session_put(sess); 9125 9126 iov[0].iov_base = buf; 9127 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9128 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 9129 iov[1].iov_len = buf_data_size; 9130 rc = ksmbd_crypt_message(work, iov, 2, 0); 9131 if (rc) 9132 return rc; 9133 9134 memmove(buf + 4, iov[1].iov_base, buf_data_size); 9135 *(__be32 *)buf = cpu_to_be32(buf_data_size); 9136 9137 return rc; 9138 } 9139 9140 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 9141 { 9142 struct ksmbd_conn *conn = work->conn; 9143 struct ksmbd_session *sess = work->sess; 9144 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); 9145 9146 if (conn->dialect < SMB30_PROT_ID) 9147 return false; 9148 9149 if (work->next_smb2_rcv_hdr_off) 9150 rsp = ksmbd_resp_buf_next(work); 9151 9152 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 9153 sess->user && !user_guest(sess->user) && 9154 rsp->Status == STATUS_SUCCESS) 9155 return true; 9156 return false; 9157 } 9158