1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> 4 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 5 */ 6 7 #include <linux/inetdevice.h> 8 #include <net/addrconf.h> 9 #include <linux/syscalls.h> 10 #include <linux/namei.h> 11 #include <linux/statfs.h> 12 #include <linux/ethtool.h> 13 #include <linux/falloc.h> 14 #include <linux/mount.h> 15 #include <linux/filelock.h> 16 17 #include "glob.h" 18 #include "smbfsctl.h" 19 #include "oplock.h" 20 #include "smbacl.h" 21 22 #include "auth.h" 23 #include "asn1.h" 24 #include "connection.h" 25 #include "transport_ipc.h" 26 #include "transport_rdma.h" 27 #include "vfs.h" 28 #include "vfs_cache.h" 29 #include "misc.h" 30 31 #include "server.h" 32 #include "smb_common.h" 33 #include "smbstatus.h" 34 #include "ksmbd_work.h" 35 #include "mgmt/user_config.h" 36 #include "mgmt/share_config.h" 37 #include "mgmt/tree_connect.h" 38 #include "mgmt/user_session.h" 39 #include "mgmt/ksmbd_ida.h" 40 #include "ndr.h" 41 42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) 43 { 44 if (work->next_smb2_rcv_hdr_off) { 45 *req = ksmbd_req_buf_next(work); 46 *rsp = ksmbd_resp_buf_next(work); 47 } else { 48 *req = smb2_get_msg(work->request_buf); 49 *rsp = smb2_get_msg(work->response_buf); 50 } 51 } 52 53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) 54 55 /** 56 * check_session_id() - check for valid session id in smb header 57 * @conn: connection instance 58 * @id: session id from smb header 59 * 60 * Return: 1 if valid session id, otherwise 0 61 */ 62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) 63 { 64 struct ksmbd_session *sess; 65 66 if (id == 0 || id == -1) 67 return false; 68 69 sess = ksmbd_session_lookup_all(conn, id); 70 if (sess) 71 return true; 72 pr_err("Invalid user session id: %llu\n", id); 73 return false; 74 } 75 76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) 77 { 78 return xa_load(&sess->ksmbd_chann_list, (long)conn); 79 } 80 81 /** 82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. 83 * @work: smb work 84 * 85 * Return: 0 if there is a tree connection matched or these are 86 * skipable commands, otherwise error 87 */ 88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work) 89 { 90 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 91 unsigned int cmd = le16_to_cpu(req_hdr->Command); 92 unsigned int tree_id; 93 94 if (cmd == SMB2_TREE_CONNECT_HE || 95 cmd == SMB2_CANCEL_HE || 96 cmd == SMB2_LOGOFF_HE) { 97 ksmbd_debug(SMB, "skip to check tree connect request\n"); 98 return 0; 99 } 100 101 if (xa_empty(&work->sess->tree_conns)) { 102 ksmbd_debug(SMB, "NO tree connected\n"); 103 return -ENOENT; 104 } 105 106 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 107 108 /* 109 * If request is not the first in Compound request, 110 * Just validate tree id in header with work->tcon->id. 111 */ 112 if (work->next_smb2_rcv_hdr_off) { 113 if (!work->tcon) { 114 pr_err("The first operation in the compound does not have tcon\n"); 115 return -EINVAL; 116 } 117 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 118 pr_err("tree id(%u) is different with id(%u) in first operation\n", 119 tree_id, work->tcon->id); 120 return -EINVAL; 121 } 122 return 1; 123 } 124 125 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 126 if (!work->tcon) { 127 pr_err("Invalid tid %d\n", tree_id); 128 return -ENOENT; 129 } 130 131 return 1; 132 } 133 134 /** 135 * smb2_set_err_rsp() - set error response code on smb response 136 * @work: smb work containing response buffer 137 */ 138 void smb2_set_err_rsp(struct ksmbd_work *work) 139 { 140 struct smb2_err_rsp *err_rsp; 141 142 if (work->next_smb2_rcv_hdr_off) 143 err_rsp = ksmbd_resp_buf_next(work); 144 else 145 err_rsp = smb2_get_msg(work->response_buf); 146 147 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 148 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 149 err_rsp->ErrorContextCount = 0; 150 err_rsp->Reserved = 0; 151 err_rsp->ByteCount = 0; 152 err_rsp->ErrorData[0] = 0; 153 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2); 154 } 155 } 156 157 /** 158 * is_smb2_neg_cmd() - is it smb2 negotiation command 159 * @work: smb work containing smb header 160 * 161 * Return: true if smb2 negotiation command, otherwise false 162 */ 163 bool is_smb2_neg_cmd(struct ksmbd_work *work) 164 { 165 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 166 167 /* is it SMB2 header ? */ 168 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 169 return false; 170 171 /* make sure it is request not response message */ 172 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 173 return false; 174 175 if (hdr->Command != SMB2_NEGOTIATE) 176 return false; 177 178 return true; 179 } 180 181 /** 182 * is_smb2_rsp() - is it smb2 response 183 * @work: smb work containing smb response buffer 184 * 185 * Return: true if smb2 response, otherwise false 186 */ 187 bool is_smb2_rsp(struct ksmbd_work *work) 188 { 189 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); 190 191 /* is it SMB2 header ? */ 192 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 193 return false; 194 195 /* make sure it is response not request message */ 196 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 197 return false; 198 199 return true; 200 } 201 202 /** 203 * get_smb2_cmd_val() - get smb command code from smb header 204 * @work: smb work containing smb request buffer 205 * 206 * Return: smb2 request command value 207 */ 208 u16 get_smb2_cmd_val(struct ksmbd_work *work) 209 { 210 struct smb2_hdr *rcv_hdr; 211 212 if (work->next_smb2_rcv_hdr_off) 213 rcv_hdr = ksmbd_req_buf_next(work); 214 else 215 rcv_hdr = smb2_get_msg(work->request_buf); 216 return le16_to_cpu(rcv_hdr->Command); 217 } 218 219 /** 220 * set_smb2_rsp_status() - set error response code on smb2 header 221 * @work: smb work containing response buffer 222 * @err: error response code 223 */ 224 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 225 { 226 struct smb2_hdr *rsp_hdr; 227 228 if (work->next_smb2_rcv_hdr_off) 229 rsp_hdr = ksmbd_resp_buf_next(work); 230 else 231 rsp_hdr = smb2_get_msg(work->response_buf); 232 rsp_hdr->Status = err; 233 smb2_set_err_rsp(work); 234 } 235 236 /** 237 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 238 * @work: smb work containing smb request buffer 239 * 240 * smb2 negotiate response is sent in reply of smb1 negotiate command for 241 * dialect auto-negotiation. 242 */ 243 int init_smb2_neg_rsp(struct ksmbd_work *work) 244 { 245 struct smb2_hdr *rsp_hdr; 246 struct smb2_negotiate_rsp *rsp; 247 struct ksmbd_conn *conn = work->conn; 248 249 *(__be32 *)work->response_buf = 250 cpu_to_be32(conn->vals->header_size); 251 252 rsp_hdr = smb2_get_msg(work->response_buf); 253 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 254 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 255 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 256 rsp_hdr->CreditRequest = cpu_to_le16(2); 257 rsp_hdr->Command = SMB2_NEGOTIATE; 258 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 259 rsp_hdr->NextCommand = 0; 260 rsp_hdr->MessageId = 0; 261 rsp_hdr->Id.SyncId.ProcessId = 0; 262 rsp_hdr->Id.SyncId.TreeId = 0; 263 rsp_hdr->SessionId = 0; 264 memset(rsp_hdr->Signature, 0, 16); 265 266 rsp = smb2_get_msg(work->response_buf); 267 268 WARN_ON(ksmbd_conn_good(conn)); 269 270 rsp->StructureSize = cpu_to_le16(65); 271 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 272 rsp->DialectRevision = cpu_to_le16(conn->dialect); 273 /* Not setting conn guid rsp->ServerGUID, as it 274 * not used by client for identifying connection 275 */ 276 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 277 /* Default Max Message Size till SMB2.0, 64K*/ 278 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 279 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 280 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 281 282 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 283 rsp->ServerStartTime = 0; 284 285 rsp->SecurityBufferOffset = cpu_to_le16(128); 286 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 287 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 288 le16_to_cpu(rsp->SecurityBufferOffset)); 289 inc_rfc1001_len(work->response_buf, 290 sizeof(struct smb2_negotiate_rsp) - 291 sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH); 292 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 293 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 294 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 295 conn->use_spnego = true; 296 297 ksmbd_conn_set_need_negotiate(conn); 298 return 0; 299 } 300 301 /** 302 * smb2_set_rsp_credits() - set number of credits in response buffer 303 * @work: smb work containing smb response buffer 304 */ 305 int smb2_set_rsp_credits(struct ksmbd_work *work) 306 { 307 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 308 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 309 struct ksmbd_conn *conn = work->conn; 310 unsigned short credits_requested, aux_max; 311 unsigned short credit_charge, credits_granted = 0; 312 313 if (work->send_no_response) 314 return 0; 315 316 hdr->CreditCharge = req_hdr->CreditCharge; 317 318 if (conn->total_credits > conn->vals->max_credits) { 319 hdr->CreditRequest = 0; 320 pr_err("Total credits overflow: %d\n", conn->total_credits); 321 return -EINVAL; 322 } 323 324 credit_charge = max_t(unsigned short, 325 le16_to_cpu(req_hdr->CreditCharge), 1); 326 if (credit_charge > conn->total_credits) { 327 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 328 credit_charge, conn->total_credits); 329 return -EINVAL; 330 } 331 332 conn->total_credits -= credit_charge; 333 conn->outstanding_credits -= credit_charge; 334 credits_requested = max_t(unsigned short, 335 le16_to_cpu(req_hdr->CreditRequest), 1); 336 337 /* according to smb2.credits smbtorture, Windows server 338 * 2016 or later grant up to 8192 credits at once. 339 * 340 * TODO: Need to adjuct CreditRequest value according to 341 * current cpu load 342 */ 343 if (hdr->Command == SMB2_NEGOTIATE) 344 aux_max = 1; 345 else 346 aux_max = conn->vals->max_credits - conn->total_credits; 347 credits_granted = min_t(unsigned short, credits_requested, aux_max); 348 349 conn->total_credits += credits_granted; 350 work->credits_granted += credits_granted; 351 352 if (!req_hdr->NextCommand) { 353 /* Update CreditRequest in last request */ 354 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 355 } 356 ksmbd_debug(SMB, 357 "credits: requested[%d] granted[%d] total_granted[%d]\n", 358 credits_requested, credits_granted, 359 conn->total_credits); 360 return 0; 361 } 362 363 /** 364 * init_chained_smb2_rsp() - initialize smb2 chained response 365 * @work: smb work containing smb response buffer 366 */ 367 static void init_chained_smb2_rsp(struct ksmbd_work *work) 368 { 369 struct smb2_hdr *req = ksmbd_req_buf_next(work); 370 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 371 struct smb2_hdr *rsp_hdr; 372 struct smb2_hdr *rcv_hdr; 373 int next_hdr_offset = 0; 374 int len, new_len; 375 376 /* Len of this response = updated RFC len - offset of previous cmd 377 * in the compound rsp 378 */ 379 380 /* Storing the current local FID which may be needed by subsequent 381 * command in the compound request 382 */ 383 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 384 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 385 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 386 work->compound_sid = le64_to_cpu(rsp->SessionId); 387 } 388 389 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 390 next_hdr_offset = le32_to_cpu(req->NextCommand); 391 392 new_len = ALIGN(len, 8); 393 inc_rfc1001_len(work->response_buf, 394 sizeof(struct smb2_hdr) + new_len - len); 395 rsp->NextCommand = cpu_to_le32(new_len); 396 397 work->next_smb2_rcv_hdr_off += next_hdr_offset; 398 work->next_smb2_rsp_hdr_off += new_len; 399 ksmbd_debug(SMB, 400 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 401 new_len, work->next_smb2_rcv_hdr_off, 402 work->next_smb2_rsp_hdr_off); 403 404 rsp_hdr = ksmbd_resp_buf_next(work); 405 rcv_hdr = ksmbd_req_buf_next(work); 406 407 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 408 ksmbd_debug(SMB, "related flag should be set\n"); 409 work->compound_fid = KSMBD_NO_FID; 410 work->compound_pfid = KSMBD_NO_FID; 411 } 412 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 413 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 414 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 415 rsp_hdr->Command = rcv_hdr->Command; 416 417 /* 418 * Message is response. We don't grant oplock yet. 419 */ 420 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 421 SMB2_FLAGS_RELATED_OPERATIONS); 422 rsp_hdr->NextCommand = 0; 423 rsp_hdr->MessageId = rcv_hdr->MessageId; 424 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 425 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 426 rsp_hdr->SessionId = rcv_hdr->SessionId; 427 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 428 } 429 430 /** 431 * is_chained_smb2_message() - check for chained command 432 * @work: smb work containing smb request buffer 433 * 434 * Return: true if chained request, otherwise false 435 */ 436 bool is_chained_smb2_message(struct ksmbd_work *work) 437 { 438 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 439 unsigned int len, next_cmd; 440 441 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 442 return false; 443 444 hdr = ksmbd_req_buf_next(work); 445 next_cmd = le32_to_cpu(hdr->NextCommand); 446 if (next_cmd > 0) { 447 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 448 __SMB2_HEADER_STRUCTURE_SIZE > 449 get_rfc1002_len(work->request_buf)) { 450 pr_err("next command(%u) offset exceeds smb msg size\n", 451 next_cmd); 452 return false; 453 } 454 455 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 456 work->response_sz) { 457 pr_err("next response offset exceeds response buffer size\n"); 458 return false; 459 } 460 461 ksmbd_debug(SMB, "got SMB2 chained command\n"); 462 init_chained_smb2_rsp(work); 463 return true; 464 } else if (work->next_smb2_rcv_hdr_off) { 465 /* 466 * This is last request in chained command, 467 * align response to 8 byte 468 */ 469 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 470 len = len - get_rfc1002_len(work->response_buf); 471 if (len) { 472 ksmbd_debug(SMB, "padding len %u\n", len); 473 inc_rfc1001_len(work->response_buf, len); 474 if (work->aux_payload_sz) 475 work->aux_payload_sz += len; 476 } 477 } 478 return false; 479 } 480 481 /** 482 * init_smb2_rsp_hdr() - initialize smb2 response 483 * @work: smb work containing smb request buffer 484 * 485 * Return: 0 486 */ 487 int init_smb2_rsp_hdr(struct ksmbd_work *work) 488 { 489 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); 490 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); 491 struct ksmbd_conn *conn = work->conn; 492 493 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 494 *(__be32 *)work->response_buf = 495 cpu_to_be32(conn->vals->header_size); 496 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 497 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 498 rsp_hdr->Command = rcv_hdr->Command; 499 500 /* 501 * Message is response. We don't grant oplock yet. 502 */ 503 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 504 rsp_hdr->NextCommand = 0; 505 rsp_hdr->MessageId = rcv_hdr->MessageId; 506 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 507 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 508 rsp_hdr->SessionId = rcv_hdr->SessionId; 509 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 510 511 return 0; 512 } 513 514 /** 515 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 516 * @work: smb work containing smb request buffer 517 * 518 * Return: 0 on success, otherwise -ENOMEM 519 */ 520 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 521 { 522 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 523 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 524 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 525 size_t sz = small_sz; 526 int cmd = le16_to_cpu(hdr->Command); 527 528 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 529 sz = large_sz; 530 531 if (cmd == SMB2_QUERY_INFO_HE) { 532 struct smb2_query_info_req *req; 533 534 req = smb2_get_msg(work->request_buf); 535 if ((req->InfoType == SMB2_O_INFO_FILE && 536 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 537 req->FileInfoClass == FILE_ALL_INFORMATION)) || 538 req->InfoType == SMB2_O_INFO_SECURITY) 539 sz = large_sz; 540 } 541 542 /* allocate large response buf for chained commands */ 543 if (le32_to_cpu(hdr->NextCommand) > 0) 544 sz = large_sz; 545 546 work->response_buf = kvzalloc(sz, GFP_KERNEL); 547 if (!work->response_buf) 548 return -ENOMEM; 549 550 work->response_sz = sz; 551 return 0; 552 } 553 554 /** 555 * smb2_check_user_session() - check for valid session for a user 556 * @work: smb work containing smb request buffer 557 * 558 * Return: 0 on success, otherwise error 559 */ 560 int smb2_check_user_session(struct ksmbd_work *work) 561 { 562 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 563 struct ksmbd_conn *conn = work->conn; 564 unsigned int cmd = le16_to_cpu(req_hdr->Command); 565 unsigned long long sess_id; 566 567 /* 568 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 569 * require a session id, so no need to validate user session's for 570 * these commands. 571 */ 572 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 573 cmd == SMB2_SESSION_SETUP_HE) 574 return 0; 575 576 if (!ksmbd_conn_good(conn)) 577 return -EIO; 578 579 sess_id = le64_to_cpu(req_hdr->SessionId); 580 581 /* 582 * If request is not the first in Compound request, 583 * Just validate session id in header with work->sess->id. 584 */ 585 if (work->next_smb2_rcv_hdr_off) { 586 if (!work->sess) { 587 pr_err("The first operation in the compound does not have sess\n"); 588 return -EINVAL; 589 } 590 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 591 pr_err("session id(%llu) is different with the first operation(%lld)\n", 592 sess_id, work->sess->id); 593 return -EINVAL; 594 } 595 return 1; 596 } 597 598 /* Check for validity of user session */ 599 work->sess = ksmbd_session_lookup_all(conn, sess_id); 600 if (work->sess) 601 return 1; 602 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 603 return -ENOENT; 604 } 605 606 static void destroy_previous_session(struct ksmbd_conn *conn, 607 struct ksmbd_user *user, u64 id) 608 { 609 struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id); 610 struct ksmbd_user *prev_user; 611 struct channel *chann; 612 long index; 613 614 if (!prev_sess) 615 return; 616 617 prev_user = prev_sess->user; 618 619 if (!prev_user || 620 strcmp(user->name, prev_user->name) || 621 user->passkey_sz != prev_user->passkey_sz || 622 memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) 623 return; 624 625 prev_sess->state = SMB2_SESSION_EXPIRED; 626 xa_for_each(&prev_sess->ksmbd_chann_list, index, chann) 627 ksmbd_conn_set_exiting(chann->conn); 628 } 629 630 /** 631 * smb2_get_name() - get filename string from on the wire smb format 632 * @src: source buffer 633 * @maxlen: maxlen of source string 634 * @local_nls: nls_table pointer 635 * 636 * Return: matching converted filename on success, otherwise error ptr 637 */ 638 static char * 639 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 640 { 641 char *name; 642 643 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 644 if (IS_ERR(name)) { 645 pr_err("failed to get name %ld\n", PTR_ERR(name)); 646 return name; 647 } 648 649 ksmbd_conv_path_to_unix(name); 650 ksmbd_strip_last_slash(name); 651 return name; 652 } 653 654 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 655 { 656 struct smb2_hdr *rsp_hdr; 657 struct ksmbd_conn *conn = work->conn; 658 int id; 659 660 rsp_hdr = smb2_get_msg(work->response_buf); 661 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 662 663 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 664 if (id < 0) { 665 pr_err("Failed to alloc async message id\n"); 666 return id; 667 } 668 work->asynchronous = true; 669 work->async_id = id; 670 rsp_hdr->Id.AsyncId = cpu_to_le64(id); 671 672 ksmbd_debug(SMB, 673 "Send interim Response to inform async request id : %d\n", 674 work->async_id); 675 676 work->cancel_fn = fn; 677 work->cancel_argv = arg; 678 679 if (list_empty(&work->async_request_entry)) { 680 spin_lock(&conn->request_lock); 681 list_add_tail(&work->async_request_entry, &conn->async_requests); 682 spin_unlock(&conn->request_lock); 683 } 684 685 return 0; 686 } 687 688 void release_async_work(struct ksmbd_work *work) 689 { 690 struct ksmbd_conn *conn = work->conn; 691 692 spin_lock(&conn->request_lock); 693 list_del_init(&work->async_request_entry); 694 spin_unlock(&conn->request_lock); 695 696 work->asynchronous = 0; 697 work->cancel_fn = NULL; 698 kfree(work->cancel_argv); 699 work->cancel_argv = NULL; 700 if (work->async_id) { 701 ksmbd_release_id(&conn->async_ida, work->async_id); 702 work->async_id = 0; 703 } 704 } 705 706 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 707 { 708 struct smb2_hdr *rsp_hdr; 709 710 rsp_hdr = smb2_get_msg(work->response_buf); 711 smb2_set_err_rsp(work); 712 rsp_hdr->Status = status; 713 714 work->multiRsp = 1; 715 ksmbd_conn_write(work); 716 rsp_hdr->Status = 0; 717 work->multiRsp = 0; 718 } 719 720 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 721 { 722 if (S_ISDIR(mode) || S_ISREG(mode)) 723 return 0; 724 725 if (S_ISLNK(mode)) 726 return IO_REPARSE_TAG_LX_SYMLINK_LE; 727 else if (S_ISFIFO(mode)) 728 return IO_REPARSE_TAG_LX_FIFO_LE; 729 else if (S_ISSOCK(mode)) 730 return IO_REPARSE_TAG_AF_UNIX_LE; 731 else if (S_ISCHR(mode)) 732 return IO_REPARSE_TAG_LX_CHR_LE; 733 else if (S_ISBLK(mode)) 734 return IO_REPARSE_TAG_LX_BLK_LE; 735 736 return 0; 737 } 738 739 /** 740 * smb2_get_dos_mode() - get file mode in dos format from unix mode 741 * @stat: kstat containing file mode 742 * @attribute: attribute flags 743 * 744 * Return: converted dos mode 745 */ 746 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 747 { 748 int attr = 0; 749 750 if (S_ISDIR(stat->mode)) { 751 attr = FILE_ATTRIBUTE_DIRECTORY | 752 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 753 } else { 754 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 755 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 756 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 757 FILE_SUPPORTS_SPARSE_FILES)) 758 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 759 760 if (smb2_get_reparse_tag_special_file(stat->mode)) 761 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 762 } 763 764 return attr; 765 } 766 767 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 768 __le16 hash_id) 769 { 770 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 771 pneg_ctxt->DataLength = cpu_to_le16(38); 772 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 773 pneg_ctxt->Reserved = cpu_to_le32(0); 774 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 775 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 776 pneg_ctxt->HashAlgorithms = hash_id; 777 } 778 779 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 780 __le16 cipher_type) 781 { 782 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 783 pneg_ctxt->DataLength = cpu_to_le16(4); 784 pneg_ctxt->Reserved = cpu_to_le32(0); 785 pneg_ctxt->CipherCount = cpu_to_le16(1); 786 pneg_ctxt->Ciphers[0] = cipher_type; 787 } 788 789 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 790 __le16 sign_algo) 791 { 792 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 793 pneg_ctxt->DataLength = 794 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 795 - sizeof(struct smb2_neg_context)); 796 pneg_ctxt->Reserved = cpu_to_le32(0); 797 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 798 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 799 } 800 801 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 802 { 803 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 804 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 805 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 806 pneg_ctxt->Name[0] = 0x93; 807 pneg_ctxt->Name[1] = 0xAD; 808 pneg_ctxt->Name[2] = 0x25; 809 pneg_ctxt->Name[3] = 0x50; 810 pneg_ctxt->Name[4] = 0x9C; 811 pneg_ctxt->Name[5] = 0xB4; 812 pneg_ctxt->Name[6] = 0x11; 813 pneg_ctxt->Name[7] = 0xE7; 814 pneg_ctxt->Name[8] = 0xB4; 815 pneg_ctxt->Name[9] = 0x23; 816 pneg_ctxt->Name[10] = 0x83; 817 pneg_ctxt->Name[11] = 0xDE; 818 pneg_ctxt->Name[12] = 0x96; 819 pneg_ctxt->Name[13] = 0x8B; 820 pneg_ctxt->Name[14] = 0xCD; 821 pneg_ctxt->Name[15] = 0x7C; 822 } 823 824 static void assemble_neg_contexts(struct ksmbd_conn *conn, 825 struct smb2_negotiate_rsp *rsp, 826 void *smb2_buf_len) 827 { 828 char * const pneg_ctxt = (char *)rsp + 829 le32_to_cpu(rsp->NegotiateContextOffset); 830 int neg_ctxt_cnt = 1; 831 int ctxt_size; 832 833 ksmbd_debug(SMB, 834 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 835 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 836 conn->preauth_info->Preauth_HashId); 837 inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING); 838 ctxt_size = sizeof(struct smb2_preauth_neg_context); 839 840 if (conn->cipher_type) { 841 /* Round to 8 byte boundary */ 842 ctxt_size = round_up(ctxt_size, 8); 843 ksmbd_debug(SMB, 844 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 845 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 846 (pneg_ctxt + ctxt_size), 847 conn->cipher_type); 848 neg_ctxt_cnt++; 849 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 850 } 851 852 /* compression context not yet supported */ 853 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 854 855 if (conn->posix_ext_supported) { 856 ctxt_size = round_up(ctxt_size, 8); 857 ksmbd_debug(SMB, 858 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 859 build_posix_ctxt((struct smb2_posix_neg_context *) 860 (pneg_ctxt + ctxt_size)); 861 neg_ctxt_cnt++; 862 ctxt_size += sizeof(struct smb2_posix_neg_context); 863 } 864 865 if (conn->signing_negotiated) { 866 ctxt_size = round_up(ctxt_size, 8); 867 ksmbd_debug(SMB, 868 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 869 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 870 (pneg_ctxt + ctxt_size), 871 conn->signing_algorithm); 872 neg_ctxt_cnt++; 873 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 874 } 875 876 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 877 inc_rfc1001_len(smb2_buf_len, ctxt_size); 878 } 879 880 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 881 struct smb2_preauth_neg_context *pneg_ctxt, 882 int ctxt_len) 883 { 884 /* 885 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 886 * which may not be present. Only check for used HashAlgorithms[1]. 887 */ 888 if (ctxt_len < 889 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 890 return STATUS_INVALID_PARAMETER; 891 892 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 893 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 894 895 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 896 return STATUS_SUCCESS; 897 } 898 899 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 900 struct smb2_encryption_neg_context *pneg_ctxt, 901 int ctxt_len) 902 { 903 int cph_cnt; 904 int i, cphs_size; 905 906 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 907 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 908 return; 909 } 910 911 conn->cipher_type = 0; 912 913 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 914 cphs_size = cph_cnt * sizeof(__le16); 915 916 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 917 ctxt_len) { 918 pr_err("Invalid cipher count(%d)\n", cph_cnt); 919 return; 920 } 921 922 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 923 return; 924 925 for (i = 0; i < cph_cnt; i++) { 926 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 927 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 928 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 929 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 930 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 931 pneg_ctxt->Ciphers[i]); 932 conn->cipher_type = pneg_ctxt->Ciphers[i]; 933 break; 934 } 935 } 936 } 937 938 /** 939 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 940 * @conn: smb connection 941 * 942 * Return: true if connection should be encrypted, else false 943 */ 944 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 945 { 946 if (!conn->ops->generate_encryptionkey) 947 return false; 948 949 /* 950 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 951 * SMB 3.1.1 uses the cipher_type field. 952 */ 953 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 954 conn->cipher_type; 955 } 956 957 static void decode_compress_ctxt(struct ksmbd_conn *conn, 958 struct smb2_compression_capabilities_context *pneg_ctxt) 959 { 960 conn->compress_algorithm = SMB3_COMPRESS_NONE; 961 } 962 963 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 964 struct smb2_signing_capabilities *pneg_ctxt, 965 int ctxt_len) 966 { 967 int sign_algo_cnt; 968 int i, sign_alos_size; 969 970 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 971 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 972 return; 973 } 974 975 conn->signing_negotiated = false; 976 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 977 sign_alos_size = sign_algo_cnt * sizeof(__le16); 978 979 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 980 ctxt_len) { 981 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 982 return; 983 } 984 985 for (i = 0; i < sign_algo_cnt; i++) { 986 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 987 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 988 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 989 pneg_ctxt->SigningAlgorithms[i]); 990 conn->signing_negotiated = true; 991 conn->signing_algorithm = 992 pneg_ctxt->SigningAlgorithms[i]; 993 break; 994 } 995 } 996 } 997 998 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 999 struct smb2_negotiate_req *req, 1000 unsigned int len_of_smb) 1001 { 1002 /* +4 is to account for the RFC1001 len field */ 1003 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1004 int i = 0, len_of_ctxts; 1005 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1006 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1007 __le32 status = STATUS_INVALID_PARAMETER; 1008 1009 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1010 if (len_of_smb <= offset) { 1011 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1012 return status; 1013 } 1014 1015 len_of_ctxts = len_of_smb - offset; 1016 1017 while (i++ < neg_ctxt_cnt) { 1018 int clen, ctxt_len; 1019 1020 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1021 break; 1022 1023 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1024 clen = le16_to_cpu(pctx->DataLength); 1025 ctxt_len = clen + sizeof(struct smb2_neg_context); 1026 1027 if (ctxt_len > len_of_ctxts) 1028 break; 1029 1030 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1031 ksmbd_debug(SMB, 1032 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1033 if (conn->preauth_info->Preauth_HashId) 1034 break; 1035 1036 status = decode_preauth_ctxt(conn, 1037 (struct smb2_preauth_neg_context *)pctx, 1038 ctxt_len); 1039 if (status != STATUS_SUCCESS) 1040 break; 1041 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1042 ksmbd_debug(SMB, 1043 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1044 if (conn->cipher_type) 1045 break; 1046 1047 decode_encrypt_ctxt(conn, 1048 (struct smb2_encryption_neg_context *)pctx, 1049 ctxt_len); 1050 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1051 ksmbd_debug(SMB, 1052 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1053 if (conn->compress_algorithm) 1054 break; 1055 1056 decode_compress_ctxt(conn, 1057 (struct smb2_compression_capabilities_context *)pctx); 1058 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1059 ksmbd_debug(SMB, 1060 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1061 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1062 ksmbd_debug(SMB, 1063 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1064 conn->posix_ext_supported = true; 1065 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1066 ksmbd_debug(SMB, 1067 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1068 1069 decode_sign_cap_ctxt(conn, 1070 (struct smb2_signing_capabilities *)pctx, 1071 ctxt_len); 1072 } 1073 1074 /* offsets must be 8 byte aligned */ 1075 offset = (ctxt_len + 7) & ~0x7; 1076 len_of_ctxts -= offset; 1077 } 1078 return status; 1079 } 1080 1081 /** 1082 * smb2_handle_negotiate() - handler for smb2 negotiate command 1083 * @work: smb work containing smb request buffer 1084 * 1085 * Return: 0 1086 */ 1087 int smb2_handle_negotiate(struct ksmbd_work *work) 1088 { 1089 struct ksmbd_conn *conn = work->conn; 1090 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); 1091 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); 1092 int rc = 0; 1093 unsigned int smb2_buf_len, smb2_neg_size; 1094 __le32 status; 1095 1096 ksmbd_debug(SMB, "Received negotiate request\n"); 1097 conn->need_neg = false; 1098 if (ksmbd_conn_good(conn)) { 1099 pr_err("conn->tcp_status is already in CifsGood State\n"); 1100 work->send_no_response = 1; 1101 return rc; 1102 } 1103 1104 smb2_buf_len = get_rfc1002_len(work->request_buf); 1105 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1106 if (smb2_neg_size > smb2_buf_len) { 1107 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1108 rc = -EINVAL; 1109 goto err_out; 1110 } 1111 1112 if (req->DialectCount == 0) { 1113 pr_err("malformed packet\n"); 1114 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1115 rc = -EINVAL; 1116 goto err_out; 1117 } 1118 1119 if (conn->dialect == SMB311_PROT_ID) { 1120 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1121 1122 if (smb2_buf_len < nego_ctxt_off) { 1123 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1124 rc = -EINVAL; 1125 goto err_out; 1126 } 1127 1128 if (smb2_neg_size > nego_ctxt_off) { 1129 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1130 rc = -EINVAL; 1131 goto err_out; 1132 } 1133 1134 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1135 nego_ctxt_off) { 1136 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1137 rc = -EINVAL; 1138 goto err_out; 1139 } 1140 } else { 1141 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1142 smb2_buf_len) { 1143 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1144 rc = -EINVAL; 1145 goto err_out; 1146 } 1147 } 1148 1149 conn->cli_cap = le32_to_cpu(req->Capabilities); 1150 switch (conn->dialect) { 1151 case SMB311_PROT_ID: 1152 conn->preauth_info = 1153 kzalloc(sizeof(struct preauth_integrity_info), 1154 GFP_KERNEL); 1155 if (!conn->preauth_info) { 1156 rc = -ENOMEM; 1157 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1158 goto err_out; 1159 } 1160 1161 status = deassemble_neg_contexts(conn, req, 1162 get_rfc1002_len(work->request_buf)); 1163 if (status != STATUS_SUCCESS) { 1164 pr_err("deassemble_neg_contexts error(0x%x)\n", 1165 status); 1166 rsp->hdr.Status = status; 1167 rc = -EINVAL; 1168 kfree(conn->preauth_info); 1169 conn->preauth_info = NULL; 1170 goto err_out; 1171 } 1172 1173 rc = init_smb3_11_server(conn); 1174 if (rc < 0) { 1175 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1176 kfree(conn->preauth_info); 1177 conn->preauth_info = NULL; 1178 goto err_out; 1179 } 1180 1181 ksmbd_gen_preauth_integrity_hash(conn, 1182 work->request_buf, 1183 conn->preauth_info->Preauth_HashValue); 1184 rsp->NegotiateContextOffset = 1185 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1186 assemble_neg_contexts(conn, rsp, work->response_buf); 1187 break; 1188 case SMB302_PROT_ID: 1189 init_smb3_02_server(conn); 1190 break; 1191 case SMB30_PROT_ID: 1192 init_smb3_0_server(conn); 1193 break; 1194 case SMB21_PROT_ID: 1195 init_smb2_1_server(conn); 1196 break; 1197 case SMB2X_PROT_ID: 1198 case BAD_PROT_ID: 1199 default: 1200 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1201 conn->dialect); 1202 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1203 rc = -EINVAL; 1204 goto err_out; 1205 } 1206 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 1207 1208 /* For stats */ 1209 conn->connection_type = conn->dialect; 1210 1211 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1212 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1213 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1214 1215 memcpy(conn->ClientGUID, req->ClientGUID, 1216 SMB2_CLIENT_GUID_SIZE); 1217 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1218 1219 rsp->StructureSize = cpu_to_le16(65); 1220 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1221 /* Not setting conn guid rsp->ServerGUID, as it 1222 * not used by client for identifying server 1223 */ 1224 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1225 1226 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1227 rsp->ServerStartTime = 0; 1228 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1229 le32_to_cpu(rsp->NegotiateContextOffset), 1230 le16_to_cpu(rsp->NegotiateContextCount)); 1231 1232 rsp->SecurityBufferOffset = cpu_to_le16(128); 1233 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1234 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1235 le16_to_cpu(rsp->SecurityBufferOffset)); 1236 inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) - 1237 sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH); 1238 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1239 conn->use_spnego = true; 1240 1241 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1242 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1243 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1244 conn->sign = true; 1245 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1246 server_conf.enforced_signing = true; 1247 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1248 conn->sign = true; 1249 } 1250 1251 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1252 ksmbd_conn_set_need_negotiate(conn); 1253 1254 err_out: 1255 if (rc < 0) 1256 smb2_set_err_rsp(work); 1257 1258 return rc; 1259 } 1260 1261 static int alloc_preauth_hash(struct ksmbd_session *sess, 1262 struct ksmbd_conn *conn) 1263 { 1264 if (sess->Preauth_HashValue) 1265 return 0; 1266 1267 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1268 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); 1269 if (!sess->Preauth_HashValue) 1270 return -ENOMEM; 1271 1272 return 0; 1273 } 1274 1275 static int generate_preauth_hash(struct ksmbd_work *work) 1276 { 1277 struct ksmbd_conn *conn = work->conn; 1278 struct ksmbd_session *sess = work->sess; 1279 u8 *preauth_hash; 1280 1281 if (conn->dialect != SMB311_PROT_ID) 1282 return 0; 1283 1284 if (conn->binding) { 1285 struct preauth_session *preauth_sess; 1286 1287 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1288 if (!preauth_sess) { 1289 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1290 if (!preauth_sess) 1291 return -ENOMEM; 1292 } 1293 1294 preauth_hash = preauth_sess->Preauth_HashValue; 1295 } else { 1296 if (!sess->Preauth_HashValue) 1297 if (alloc_preauth_hash(sess, conn)) 1298 return -ENOMEM; 1299 preauth_hash = sess->Preauth_HashValue; 1300 } 1301 1302 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1303 return 0; 1304 } 1305 1306 static int decode_negotiation_token(struct ksmbd_conn *conn, 1307 struct negotiate_message *negblob, 1308 size_t sz) 1309 { 1310 if (!conn->use_spnego) 1311 return -EINVAL; 1312 1313 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1314 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1315 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1316 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1317 conn->use_spnego = false; 1318 } 1319 } 1320 return 0; 1321 } 1322 1323 static int ntlm_negotiate(struct ksmbd_work *work, 1324 struct negotiate_message *negblob, 1325 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1326 { 1327 struct challenge_message *chgblob; 1328 unsigned char *spnego_blob = NULL; 1329 u16 spnego_blob_len; 1330 char *neg_blob; 1331 int sz, rc; 1332 1333 ksmbd_debug(SMB, "negotiate phase\n"); 1334 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1335 if (rc) 1336 return rc; 1337 1338 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1339 chgblob = 1340 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); 1341 memset(chgblob, 0, sizeof(struct challenge_message)); 1342 1343 if (!work->conn->use_spnego) { 1344 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1345 if (sz < 0) 1346 return -ENOMEM; 1347 1348 rsp->SecurityBufferLength = cpu_to_le16(sz); 1349 return 0; 1350 } 1351 1352 sz = sizeof(struct challenge_message); 1353 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1354 1355 neg_blob = kzalloc(sz, GFP_KERNEL); 1356 if (!neg_blob) 1357 return -ENOMEM; 1358 1359 chgblob = (struct challenge_message *)neg_blob; 1360 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1361 if (sz < 0) { 1362 rc = -ENOMEM; 1363 goto out; 1364 } 1365 1366 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1367 neg_blob, sz); 1368 if (rc) { 1369 rc = -ENOMEM; 1370 goto out; 1371 } 1372 1373 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1374 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1375 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1376 1377 out: 1378 kfree(spnego_blob); 1379 kfree(neg_blob); 1380 return rc; 1381 } 1382 1383 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1384 struct smb2_sess_setup_req *req) 1385 { 1386 int sz; 1387 1388 if (conn->use_spnego && conn->mechToken) 1389 return (struct authenticate_message *)conn->mechToken; 1390 1391 sz = le16_to_cpu(req->SecurityBufferOffset); 1392 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1393 + sz); 1394 } 1395 1396 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1397 struct smb2_sess_setup_req *req) 1398 { 1399 struct authenticate_message *authblob; 1400 struct ksmbd_user *user; 1401 char *name; 1402 unsigned int name_off, name_len, secbuf_len; 1403 1404 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1405 if (secbuf_len < sizeof(struct authenticate_message)) { 1406 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1407 return NULL; 1408 } 1409 authblob = user_authblob(conn, req); 1410 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1411 name_len = le16_to_cpu(authblob->UserName.Length); 1412 1413 if (secbuf_len < (u64)name_off + name_len) 1414 return NULL; 1415 1416 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1417 name_len, 1418 true, 1419 conn->local_nls); 1420 if (IS_ERR(name)) { 1421 pr_err("cannot allocate memory\n"); 1422 return NULL; 1423 } 1424 1425 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1426 user = ksmbd_login_user(name); 1427 kfree(name); 1428 return user; 1429 } 1430 1431 static int ntlm_authenticate(struct ksmbd_work *work, 1432 struct smb2_sess_setup_req *req, 1433 struct smb2_sess_setup_rsp *rsp) 1434 { 1435 struct ksmbd_conn *conn = work->conn; 1436 struct ksmbd_session *sess = work->sess; 1437 struct channel *chann = NULL; 1438 struct ksmbd_user *user; 1439 u64 prev_id; 1440 int sz, rc; 1441 1442 ksmbd_debug(SMB, "authenticate phase\n"); 1443 if (conn->use_spnego) { 1444 unsigned char *spnego_blob; 1445 u16 spnego_blob_len; 1446 1447 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1448 &spnego_blob_len, 1449 0); 1450 if (rc) 1451 return -ENOMEM; 1452 1453 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1454 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1455 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1456 kfree(spnego_blob); 1457 inc_rfc1001_len(work->response_buf, spnego_blob_len - 1); 1458 } 1459 1460 user = session_user(conn, req); 1461 if (!user) { 1462 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1463 return -EPERM; 1464 } 1465 1466 /* Check for previous session */ 1467 prev_id = le64_to_cpu(req->PreviousSessionId); 1468 if (prev_id && prev_id != sess->id) 1469 destroy_previous_session(conn, user, prev_id); 1470 1471 if (sess->state == SMB2_SESSION_VALID) { 1472 /* 1473 * Reuse session if anonymous try to connect 1474 * on reauthetication. 1475 */ 1476 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1477 ksmbd_free_user(user); 1478 return 0; 1479 } 1480 1481 if (!ksmbd_compare_user(sess->user, user)) { 1482 ksmbd_free_user(user); 1483 return -EPERM; 1484 } 1485 ksmbd_free_user(user); 1486 } else { 1487 sess->user = user; 1488 } 1489 1490 if (conn->binding == false && user_guest(sess->user)) { 1491 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1492 } else { 1493 struct authenticate_message *authblob; 1494 1495 authblob = user_authblob(conn, req); 1496 sz = le16_to_cpu(req->SecurityBufferLength); 1497 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1498 if (rc) { 1499 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1500 ksmbd_debug(SMB, "authentication failed\n"); 1501 return -EPERM; 1502 } 1503 } 1504 1505 /* 1506 * If session state is SMB2_SESSION_VALID, We can assume 1507 * that it is reauthentication. And the user/password 1508 * has been verified, so return it here. 1509 */ 1510 if (sess->state == SMB2_SESSION_VALID) { 1511 if (conn->binding) 1512 goto binding_session; 1513 return 0; 1514 } 1515 1516 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1517 (conn->sign || server_conf.enforced_signing)) || 1518 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1519 sess->sign = true; 1520 1521 if (smb3_encryption_negotiated(conn) && 1522 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1523 rc = conn->ops->generate_encryptionkey(conn, sess); 1524 if (rc) { 1525 ksmbd_debug(SMB, 1526 "SMB3 encryption key generation failed\n"); 1527 return -EINVAL; 1528 } 1529 sess->enc = true; 1530 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1531 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1532 /* 1533 * signing is disable if encryption is enable 1534 * on this session 1535 */ 1536 sess->sign = false; 1537 } 1538 1539 binding_session: 1540 if (conn->dialect >= SMB30_PROT_ID) { 1541 chann = lookup_chann_list(sess, conn); 1542 if (!chann) { 1543 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1544 if (!chann) 1545 return -ENOMEM; 1546 1547 chann->conn = conn; 1548 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1549 } 1550 } 1551 1552 if (conn->ops->generate_signingkey) { 1553 rc = conn->ops->generate_signingkey(sess, conn); 1554 if (rc) { 1555 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1556 return -EINVAL; 1557 } 1558 } 1559 1560 if (!ksmbd_conn_lookup_dialect(conn)) { 1561 pr_err("fail to verify the dialect\n"); 1562 return -ENOENT; 1563 } 1564 return 0; 1565 } 1566 1567 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1568 static int krb5_authenticate(struct ksmbd_work *work, 1569 struct smb2_sess_setup_req *req, 1570 struct smb2_sess_setup_rsp *rsp) 1571 { 1572 struct ksmbd_conn *conn = work->conn; 1573 struct ksmbd_session *sess = work->sess; 1574 char *in_blob, *out_blob; 1575 struct channel *chann = NULL; 1576 u64 prev_sess_id; 1577 int in_len, out_len; 1578 int retval; 1579 1580 in_blob = (char *)&req->hdr.ProtocolId + 1581 le16_to_cpu(req->SecurityBufferOffset); 1582 in_len = le16_to_cpu(req->SecurityBufferLength); 1583 out_blob = (char *)&rsp->hdr.ProtocolId + 1584 le16_to_cpu(rsp->SecurityBufferOffset); 1585 out_len = work->response_sz - 1586 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1587 1588 /* Check previous session */ 1589 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1590 if (prev_sess_id && prev_sess_id != sess->id) 1591 destroy_previous_session(conn, sess->user, prev_sess_id); 1592 1593 if (sess->state == SMB2_SESSION_VALID) 1594 ksmbd_free_user(sess->user); 1595 1596 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1597 out_blob, &out_len); 1598 if (retval) { 1599 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1600 return -EINVAL; 1601 } 1602 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1603 inc_rfc1001_len(work->response_buf, out_len - 1); 1604 1605 if ((conn->sign || server_conf.enforced_signing) || 1606 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1607 sess->sign = true; 1608 1609 if (smb3_encryption_negotiated(conn)) { 1610 retval = conn->ops->generate_encryptionkey(conn, sess); 1611 if (retval) { 1612 ksmbd_debug(SMB, 1613 "SMB3 encryption key generation failed\n"); 1614 return -EINVAL; 1615 } 1616 sess->enc = true; 1617 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1618 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1619 sess->sign = false; 1620 } 1621 1622 if (conn->dialect >= SMB30_PROT_ID) { 1623 chann = lookup_chann_list(sess, conn); 1624 if (!chann) { 1625 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1626 if (!chann) 1627 return -ENOMEM; 1628 1629 chann->conn = conn; 1630 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1631 } 1632 } 1633 1634 if (conn->ops->generate_signingkey) { 1635 retval = conn->ops->generate_signingkey(sess, conn); 1636 if (retval) { 1637 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1638 return -EINVAL; 1639 } 1640 } 1641 1642 if (!ksmbd_conn_lookup_dialect(conn)) { 1643 pr_err("fail to verify the dialect\n"); 1644 return -ENOENT; 1645 } 1646 return 0; 1647 } 1648 #else 1649 static int krb5_authenticate(struct ksmbd_work *work, 1650 struct smb2_sess_setup_req *req, 1651 struct smb2_sess_setup_rsp *rsp) 1652 { 1653 return -EOPNOTSUPP; 1654 } 1655 #endif 1656 1657 int smb2_sess_setup(struct ksmbd_work *work) 1658 { 1659 struct ksmbd_conn *conn = work->conn; 1660 struct smb2_sess_setup_req *req; 1661 struct smb2_sess_setup_rsp *rsp; 1662 struct ksmbd_session *sess; 1663 struct negotiate_message *negblob; 1664 unsigned int negblob_len, negblob_off; 1665 int rc = 0; 1666 1667 ksmbd_debug(SMB, "Received request for session setup\n"); 1668 1669 WORK_BUFFERS(work, req, rsp); 1670 1671 rsp->StructureSize = cpu_to_le16(9); 1672 rsp->SessionFlags = 0; 1673 rsp->SecurityBufferOffset = cpu_to_le16(72); 1674 rsp->SecurityBufferLength = 0; 1675 inc_rfc1001_len(work->response_buf, 9); 1676 1677 ksmbd_conn_lock(conn); 1678 if (!req->hdr.SessionId) { 1679 sess = ksmbd_smb2_session_create(); 1680 if (!sess) { 1681 rc = -ENOMEM; 1682 goto out_err; 1683 } 1684 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1685 rc = ksmbd_session_register(conn, sess); 1686 if (rc) 1687 goto out_err; 1688 } else if (conn->dialect >= SMB30_PROT_ID && 1689 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1690 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1691 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1692 1693 sess = ksmbd_session_lookup_slowpath(sess_id); 1694 if (!sess) { 1695 rc = -ENOENT; 1696 goto out_err; 1697 } 1698 1699 if (conn->dialect != sess->dialect) { 1700 rc = -EINVAL; 1701 goto out_err; 1702 } 1703 1704 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1705 rc = -EINVAL; 1706 goto out_err; 1707 } 1708 1709 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1710 SMB2_CLIENT_GUID_SIZE)) { 1711 rc = -ENOENT; 1712 goto out_err; 1713 } 1714 1715 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1716 rc = -EACCES; 1717 goto out_err; 1718 } 1719 1720 if (sess->state == SMB2_SESSION_EXPIRED) { 1721 rc = -EFAULT; 1722 goto out_err; 1723 } 1724 1725 if (ksmbd_conn_need_reconnect(conn)) { 1726 rc = -EFAULT; 1727 sess = NULL; 1728 goto out_err; 1729 } 1730 1731 if (ksmbd_session_lookup(conn, sess_id)) { 1732 rc = -EACCES; 1733 goto out_err; 1734 } 1735 1736 if (user_guest(sess->user)) { 1737 rc = -EOPNOTSUPP; 1738 goto out_err; 1739 } 1740 1741 conn->binding = true; 1742 } else if ((conn->dialect < SMB30_PROT_ID || 1743 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1744 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1745 sess = NULL; 1746 rc = -EACCES; 1747 goto out_err; 1748 } else { 1749 sess = ksmbd_session_lookup(conn, 1750 le64_to_cpu(req->hdr.SessionId)); 1751 if (!sess) { 1752 rc = -ENOENT; 1753 goto out_err; 1754 } 1755 1756 if (sess->state == SMB2_SESSION_EXPIRED) { 1757 rc = -EFAULT; 1758 goto out_err; 1759 } 1760 1761 if (ksmbd_conn_need_reconnect(conn)) { 1762 rc = -EFAULT; 1763 sess = NULL; 1764 goto out_err; 1765 } 1766 } 1767 work->sess = sess; 1768 1769 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1770 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1771 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) || 1772 negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1773 rc = -EINVAL; 1774 goto out_err; 1775 } 1776 1777 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1778 negblob_off); 1779 1780 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1781 if (conn->mechToken) 1782 negblob = (struct negotiate_message *)conn->mechToken; 1783 } 1784 1785 if (server_conf.auth_mechs & conn->auth_mechs) { 1786 rc = generate_preauth_hash(work); 1787 if (rc) 1788 goto out_err; 1789 1790 if (conn->preferred_auth_mech & 1791 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1792 rc = krb5_authenticate(work, req, rsp); 1793 if (rc) { 1794 rc = -EINVAL; 1795 goto out_err; 1796 } 1797 1798 if (!ksmbd_conn_need_reconnect(conn)) { 1799 ksmbd_conn_set_good(conn); 1800 sess->state = SMB2_SESSION_VALID; 1801 } 1802 kfree(sess->Preauth_HashValue); 1803 sess->Preauth_HashValue = NULL; 1804 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1805 if (negblob->MessageType == NtLmNegotiate) { 1806 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1807 if (rc) 1808 goto out_err; 1809 rsp->hdr.Status = 1810 STATUS_MORE_PROCESSING_REQUIRED; 1811 /* 1812 * Note: here total size -1 is done as an 1813 * adjustment for 0 size blob 1814 */ 1815 inc_rfc1001_len(work->response_buf, 1816 le16_to_cpu(rsp->SecurityBufferLength) - 1); 1817 1818 } else if (negblob->MessageType == NtLmAuthenticate) { 1819 rc = ntlm_authenticate(work, req, rsp); 1820 if (rc) 1821 goto out_err; 1822 1823 if (!ksmbd_conn_need_reconnect(conn)) { 1824 ksmbd_conn_set_good(conn); 1825 sess->state = SMB2_SESSION_VALID; 1826 } 1827 if (conn->binding) { 1828 struct preauth_session *preauth_sess; 1829 1830 preauth_sess = 1831 ksmbd_preauth_session_lookup(conn, sess->id); 1832 if (preauth_sess) { 1833 list_del(&preauth_sess->preauth_entry); 1834 kfree(preauth_sess); 1835 } 1836 } 1837 kfree(sess->Preauth_HashValue); 1838 sess->Preauth_HashValue = NULL; 1839 } else { 1840 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1841 le32_to_cpu(negblob->MessageType)); 1842 rc = -EINVAL; 1843 } 1844 } else { 1845 /* TODO: need one more negotiation */ 1846 pr_err("Not support the preferred authentication\n"); 1847 rc = -EINVAL; 1848 } 1849 } else { 1850 pr_err("Not support authentication\n"); 1851 rc = -EINVAL; 1852 } 1853 1854 out_err: 1855 if (rc == -EINVAL) 1856 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1857 else if (rc == -ENOENT) 1858 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1859 else if (rc == -EACCES) 1860 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1861 else if (rc == -EFAULT) 1862 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1863 else if (rc == -ENOMEM) 1864 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1865 else if (rc == -EOPNOTSUPP) 1866 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1867 else if (rc) 1868 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1869 1870 if (conn->use_spnego && conn->mechToken) { 1871 kfree(conn->mechToken); 1872 conn->mechToken = NULL; 1873 } 1874 1875 if (rc < 0) { 1876 /* 1877 * SecurityBufferOffset should be set to zero 1878 * in session setup error response. 1879 */ 1880 rsp->SecurityBufferOffset = 0; 1881 1882 if (sess) { 1883 bool try_delay = false; 1884 1885 /* 1886 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1887 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1888 * failure to make it harder to send enough random connection requests 1889 * to break into a server. 1890 */ 1891 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1892 try_delay = true; 1893 1894 sess->last_active = jiffies; 1895 sess->state = SMB2_SESSION_EXPIRED; 1896 if (try_delay) { 1897 ksmbd_conn_set_need_reconnect(conn); 1898 ssleep(5); 1899 ksmbd_conn_set_need_negotiate(conn); 1900 } 1901 } 1902 } 1903 1904 ksmbd_conn_unlock(conn); 1905 return rc; 1906 } 1907 1908 /** 1909 * smb2_tree_connect() - handler for smb2 tree connect command 1910 * @work: smb work containing smb request buffer 1911 * 1912 * Return: 0 on success, otherwise error 1913 */ 1914 int smb2_tree_connect(struct ksmbd_work *work) 1915 { 1916 struct ksmbd_conn *conn = work->conn; 1917 struct smb2_tree_connect_req *req; 1918 struct smb2_tree_connect_rsp *rsp; 1919 struct ksmbd_session *sess = work->sess; 1920 char *treename = NULL, *name = NULL; 1921 struct ksmbd_tree_conn_status status; 1922 struct ksmbd_share_config *share; 1923 int rc = -EINVAL; 1924 1925 WORK_BUFFERS(work, req, rsp); 1926 1927 treename = smb_strndup_from_utf16(req->Buffer, 1928 le16_to_cpu(req->PathLength), true, 1929 conn->local_nls); 1930 if (IS_ERR(treename)) { 1931 pr_err("treename is NULL\n"); 1932 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1933 goto out_err1; 1934 } 1935 1936 name = ksmbd_extract_sharename(conn->um, treename); 1937 if (IS_ERR(name)) { 1938 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1939 goto out_err1; 1940 } 1941 1942 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 1943 name, treename); 1944 1945 status = ksmbd_tree_conn_connect(conn, sess, name); 1946 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 1947 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 1948 else 1949 goto out_err1; 1950 1951 share = status.tree_conn->share_conf; 1952 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 1953 ksmbd_debug(SMB, "IPC share path request\n"); 1954 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 1955 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1956 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 1957 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 1958 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1959 FILE_SYNCHRONIZE_LE; 1960 } else { 1961 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 1962 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1963 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 1964 if (test_tree_conn_flag(status.tree_conn, 1965 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 1966 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 1967 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 1968 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 1969 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 1970 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1971 FILE_SYNCHRONIZE_LE; 1972 } 1973 } 1974 1975 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 1976 if (conn->posix_ext_supported) 1977 status.tree_conn->posix_extensions = true; 1978 1979 rsp->StructureSize = cpu_to_le16(16); 1980 inc_rfc1001_len(work->response_buf, 16); 1981 out_err1: 1982 rsp->Capabilities = 0; 1983 rsp->Reserved = 0; 1984 /* default manual caching */ 1985 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 1986 1987 if (!IS_ERR(treename)) 1988 kfree(treename); 1989 if (!IS_ERR(name)) 1990 kfree(name); 1991 1992 switch (status.ret) { 1993 case KSMBD_TREE_CONN_STATUS_OK: 1994 rsp->hdr.Status = STATUS_SUCCESS; 1995 rc = 0; 1996 break; 1997 case -ESTALE: 1998 case -ENOENT: 1999 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2000 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2001 break; 2002 case -ENOMEM: 2003 case KSMBD_TREE_CONN_STATUS_NOMEM: 2004 rsp->hdr.Status = STATUS_NO_MEMORY; 2005 break; 2006 case KSMBD_TREE_CONN_STATUS_ERROR: 2007 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2008 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2009 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2010 break; 2011 case -EINVAL: 2012 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2013 break; 2014 default: 2015 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2016 } 2017 2018 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2019 smb2_set_err_rsp(work); 2020 2021 return rc; 2022 } 2023 2024 /** 2025 * smb2_create_open_flags() - convert smb open flags to unix open flags 2026 * @file_present: is file already present 2027 * @access: file access flags 2028 * @disposition: file disposition flags 2029 * @may_flags: set with MAY_ flags 2030 * 2031 * Return: file open flags 2032 */ 2033 static int smb2_create_open_flags(bool file_present, __le32 access, 2034 __le32 disposition, 2035 int *may_flags) 2036 { 2037 int oflags = O_NONBLOCK | O_LARGEFILE; 2038 2039 if (access & FILE_READ_DESIRED_ACCESS_LE && 2040 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2041 oflags |= O_RDWR; 2042 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2043 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2044 oflags |= O_WRONLY; 2045 *may_flags = MAY_OPEN | MAY_WRITE; 2046 } else { 2047 oflags |= O_RDONLY; 2048 *may_flags = MAY_OPEN | MAY_READ; 2049 } 2050 2051 if (access == FILE_READ_ATTRIBUTES_LE) 2052 oflags |= O_PATH; 2053 2054 if (file_present) { 2055 switch (disposition & FILE_CREATE_MASK_LE) { 2056 case FILE_OPEN_LE: 2057 case FILE_CREATE_LE: 2058 break; 2059 case FILE_SUPERSEDE_LE: 2060 case FILE_OVERWRITE_LE: 2061 case FILE_OVERWRITE_IF_LE: 2062 oflags |= O_TRUNC; 2063 break; 2064 default: 2065 break; 2066 } 2067 } else { 2068 switch (disposition & FILE_CREATE_MASK_LE) { 2069 case FILE_SUPERSEDE_LE: 2070 case FILE_CREATE_LE: 2071 case FILE_OPEN_IF_LE: 2072 case FILE_OVERWRITE_IF_LE: 2073 oflags |= O_CREAT; 2074 break; 2075 case FILE_OPEN_LE: 2076 case FILE_OVERWRITE_LE: 2077 oflags &= ~O_CREAT; 2078 break; 2079 default: 2080 break; 2081 } 2082 } 2083 2084 return oflags; 2085 } 2086 2087 /** 2088 * smb2_tree_disconnect() - handler for smb tree connect request 2089 * @work: smb work containing request buffer 2090 * 2091 * Return: 0 2092 */ 2093 int smb2_tree_disconnect(struct ksmbd_work *work) 2094 { 2095 struct smb2_tree_disconnect_rsp *rsp; 2096 struct smb2_tree_disconnect_req *req; 2097 struct ksmbd_session *sess = work->sess; 2098 struct ksmbd_tree_connect *tcon = work->tcon; 2099 2100 WORK_BUFFERS(work, req, rsp); 2101 2102 rsp->StructureSize = cpu_to_le16(4); 2103 inc_rfc1001_len(work->response_buf, 4); 2104 2105 ksmbd_debug(SMB, "request\n"); 2106 2107 if (!tcon || test_and_set_bit(TREE_CONN_EXPIRE, &tcon->status)) { 2108 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2109 2110 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2111 smb2_set_err_rsp(work); 2112 return 0; 2113 } 2114 2115 ksmbd_close_tree_conn_fds(work); 2116 ksmbd_tree_conn_disconnect(sess, tcon); 2117 work->tcon = NULL; 2118 return 0; 2119 } 2120 2121 /** 2122 * smb2_session_logoff() - handler for session log off request 2123 * @work: smb work containing request buffer 2124 * 2125 * Return: 0 2126 */ 2127 int smb2_session_logoff(struct ksmbd_work *work) 2128 { 2129 struct ksmbd_conn *conn = work->conn; 2130 struct smb2_logoff_req *req; 2131 struct smb2_logoff_rsp *rsp; 2132 struct ksmbd_session *sess; 2133 u64 sess_id; 2134 2135 WORK_BUFFERS(work, req, rsp); 2136 2137 sess_id = le64_to_cpu(req->hdr.SessionId); 2138 2139 rsp->StructureSize = cpu_to_le16(4); 2140 inc_rfc1001_len(work->response_buf, 4); 2141 2142 ksmbd_debug(SMB, "request\n"); 2143 2144 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2145 ksmbd_close_session_fds(work); 2146 ksmbd_conn_wait_idle(conn, sess_id); 2147 2148 /* 2149 * Re-lookup session to validate if session is deleted 2150 * while waiting request complete 2151 */ 2152 sess = ksmbd_session_lookup_all(conn, sess_id); 2153 if (ksmbd_tree_conn_session_logoff(sess)) { 2154 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2155 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2156 smb2_set_err_rsp(work); 2157 return 0; 2158 } 2159 2160 ksmbd_destroy_file_table(&sess->file_table); 2161 sess->state = SMB2_SESSION_EXPIRED; 2162 2163 ksmbd_free_user(sess->user); 2164 sess->user = NULL; 2165 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); 2166 return 0; 2167 } 2168 2169 /** 2170 * create_smb2_pipe() - create IPC pipe 2171 * @work: smb work containing request buffer 2172 * 2173 * Return: 0 on success, otherwise error 2174 */ 2175 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2176 { 2177 struct smb2_create_rsp *rsp; 2178 struct smb2_create_req *req; 2179 int id; 2180 int err; 2181 char *name; 2182 2183 WORK_BUFFERS(work, req, rsp); 2184 2185 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2186 1, work->conn->local_nls); 2187 if (IS_ERR(name)) { 2188 rsp->hdr.Status = STATUS_NO_MEMORY; 2189 err = PTR_ERR(name); 2190 goto out; 2191 } 2192 2193 id = ksmbd_session_rpc_open(work->sess, name); 2194 if (id < 0) { 2195 pr_err("Unable to open RPC pipe: %d\n", id); 2196 err = id; 2197 goto out; 2198 } 2199 2200 rsp->hdr.Status = STATUS_SUCCESS; 2201 rsp->StructureSize = cpu_to_le16(89); 2202 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2203 rsp->Flags = 0; 2204 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2205 2206 rsp->CreationTime = cpu_to_le64(0); 2207 rsp->LastAccessTime = cpu_to_le64(0); 2208 rsp->ChangeTime = cpu_to_le64(0); 2209 rsp->AllocationSize = cpu_to_le64(0); 2210 rsp->EndofFile = cpu_to_le64(0); 2211 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2212 rsp->Reserved2 = 0; 2213 rsp->VolatileFileId = id; 2214 rsp->PersistentFileId = 0; 2215 rsp->CreateContextsOffset = 0; 2216 rsp->CreateContextsLength = 0; 2217 2218 inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/ 2219 kfree(name); 2220 return 0; 2221 2222 out: 2223 switch (err) { 2224 case -EINVAL: 2225 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2226 break; 2227 case -ENOSPC: 2228 case -ENOMEM: 2229 rsp->hdr.Status = STATUS_NO_MEMORY; 2230 break; 2231 } 2232 2233 if (!IS_ERR(name)) 2234 kfree(name); 2235 2236 smb2_set_err_rsp(work); 2237 return err; 2238 } 2239 2240 /** 2241 * smb2_set_ea() - handler for setting extended attributes using set 2242 * info command 2243 * @eabuf: set info command buffer 2244 * @buf_len: set info command buffer length 2245 * @path: dentry path for get ea 2246 * 2247 * Return: 0 on success, otherwise error 2248 */ 2249 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2250 const struct path *path) 2251 { 2252 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2253 char *attr_name = NULL, *value; 2254 int rc = 0; 2255 unsigned int next = 0; 2256 2257 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2258 le16_to_cpu(eabuf->EaValueLength)) 2259 return -EINVAL; 2260 2261 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); 2262 if (!attr_name) 2263 return -ENOMEM; 2264 2265 do { 2266 if (!eabuf->EaNameLength) 2267 goto next; 2268 2269 ksmbd_debug(SMB, 2270 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2271 eabuf->name, eabuf->EaNameLength, 2272 le16_to_cpu(eabuf->EaValueLength), 2273 le32_to_cpu(eabuf->NextEntryOffset)); 2274 2275 if (eabuf->EaNameLength > 2276 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2277 rc = -EINVAL; 2278 break; 2279 } 2280 2281 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2282 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2283 eabuf->EaNameLength); 2284 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2285 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2286 2287 if (!eabuf->EaValueLength) { 2288 rc = ksmbd_vfs_casexattr_len(idmap, 2289 path->dentry, 2290 attr_name, 2291 XATTR_USER_PREFIX_LEN + 2292 eabuf->EaNameLength); 2293 2294 /* delete the EA only when it exits */ 2295 if (rc > 0) { 2296 rc = ksmbd_vfs_remove_xattr(idmap, 2297 path, 2298 attr_name); 2299 2300 if (rc < 0) { 2301 ksmbd_debug(SMB, 2302 "remove xattr failed(%d)\n", 2303 rc); 2304 break; 2305 } 2306 } 2307 2308 /* if the EA doesn't exist, just do nothing. */ 2309 rc = 0; 2310 } else { 2311 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2312 le16_to_cpu(eabuf->EaValueLength), 0); 2313 if (rc < 0) { 2314 ksmbd_debug(SMB, 2315 "ksmbd_vfs_setxattr is failed(%d)\n", 2316 rc); 2317 break; 2318 } 2319 } 2320 2321 next: 2322 next = le32_to_cpu(eabuf->NextEntryOffset); 2323 if (next == 0 || buf_len < next) 2324 break; 2325 buf_len -= next; 2326 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2327 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength)) 2328 break; 2329 2330 } while (next != 0); 2331 2332 kfree(attr_name); 2333 return rc; 2334 } 2335 2336 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2337 struct ksmbd_file *fp, 2338 char *stream_name, int s_type) 2339 { 2340 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2341 size_t xattr_stream_size; 2342 char *xattr_stream_name; 2343 int rc; 2344 2345 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2346 &xattr_stream_name, 2347 &xattr_stream_size, 2348 s_type); 2349 if (rc) 2350 return rc; 2351 2352 fp->stream.name = xattr_stream_name; 2353 fp->stream.size = xattr_stream_size; 2354 2355 /* Check if there is stream prefix in xattr space */ 2356 rc = ksmbd_vfs_casexattr_len(idmap, 2357 path->dentry, 2358 xattr_stream_name, 2359 xattr_stream_size); 2360 if (rc >= 0) 2361 return 0; 2362 2363 if (fp->cdoption == FILE_OPEN_LE) { 2364 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2365 return -EBADF; 2366 } 2367 2368 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0); 2369 if (rc < 0) 2370 pr_err("Failed to store XATTR stream name :%d\n", rc); 2371 return 0; 2372 } 2373 2374 static int smb2_remove_smb_xattrs(const struct path *path) 2375 { 2376 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2377 char *name, *xattr_list = NULL; 2378 ssize_t xattr_list_len; 2379 int err = 0; 2380 2381 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2382 if (xattr_list_len < 0) { 2383 goto out; 2384 } else if (!xattr_list_len) { 2385 ksmbd_debug(SMB, "empty xattr in the file\n"); 2386 goto out; 2387 } 2388 2389 for (name = xattr_list; name - xattr_list < xattr_list_len; 2390 name += strlen(name) + 1) { 2391 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2392 2393 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2394 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2395 STREAM_PREFIX_LEN)) { 2396 err = ksmbd_vfs_remove_xattr(idmap, path, 2397 name); 2398 if (err) 2399 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2400 name); 2401 } 2402 } 2403 out: 2404 kvfree(xattr_list); 2405 return err; 2406 } 2407 2408 static int smb2_create_truncate(const struct path *path) 2409 { 2410 int rc = vfs_truncate(path, 0); 2411 2412 if (rc) { 2413 pr_err("vfs_truncate failed, rc %d\n", rc); 2414 return rc; 2415 } 2416 2417 rc = smb2_remove_smb_xattrs(path); 2418 if (rc == -EOPNOTSUPP) 2419 rc = 0; 2420 if (rc) 2421 ksmbd_debug(SMB, 2422 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2423 rc); 2424 return rc; 2425 } 2426 2427 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2428 struct ksmbd_file *fp) 2429 { 2430 struct xattr_dos_attrib da = {0}; 2431 int rc; 2432 2433 if (!test_share_config_flag(tcon->share_conf, 2434 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2435 return; 2436 2437 da.version = 4; 2438 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2439 da.itime = da.create_time = fp->create_time; 2440 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2441 XATTR_DOSINFO_ITIME; 2442 2443 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da); 2444 if (rc) 2445 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2446 } 2447 2448 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2449 const struct path *path, struct ksmbd_file *fp) 2450 { 2451 struct xattr_dos_attrib da; 2452 int rc; 2453 2454 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2455 2456 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2457 if (!test_share_config_flag(tcon->share_conf, 2458 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2459 return; 2460 2461 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2462 path->dentry, &da); 2463 if (rc > 0) { 2464 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2465 fp->create_time = da.create_time; 2466 fp->itime = da.itime; 2467 } 2468 } 2469 2470 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path, 2471 struct path *path, char *name, int open_flags, 2472 umode_t posix_mode, bool is_dir) 2473 { 2474 struct ksmbd_tree_connect *tcon = work->tcon; 2475 struct ksmbd_share_config *share = tcon->share_conf; 2476 umode_t mode; 2477 int rc; 2478 2479 if (!(open_flags & O_CREAT)) 2480 return -EBADF; 2481 2482 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2483 if (is_dir == true) { 2484 ksmbd_debug(SMB, "creating directory\n"); 2485 2486 mode = share_config_directory_mode(share, posix_mode); 2487 rc = ksmbd_vfs_mkdir(work, name, mode); 2488 if (rc) 2489 return rc; 2490 } else { 2491 ksmbd_debug(SMB, "creating regular file\n"); 2492 2493 mode = share_config_create_mode(share, posix_mode); 2494 rc = ksmbd_vfs_create(work, name, mode); 2495 if (rc) 2496 return rc; 2497 } 2498 2499 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0); 2500 if (rc) { 2501 pr_err("cannot get linux path (%s), err = %d\n", 2502 name, rc); 2503 return rc; 2504 } 2505 return 0; 2506 } 2507 2508 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2509 struct smb2_create_req *req, 2510 const struct path *path) 2511 { 2512 struct create_context *context; 2513 struct create_sd_buf_req *sd_buf; 2514 2515 if (!req->CreateContextsOffset) 2516 return -ENOENT; 2517 2518 /* Parse SD BUFFER create contexts */ 2519 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2520 if (!context) 2521 return -ENOENT; 2522 else if (IS_ERR(context)) 2523 return PTR_ERR(context); 2524 2525 ksmbd_debug(SMB, 2526 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2527 sd_buf = (struct create_sd_buf_req *)context; 2528 if (le16_to_cpu(context->DataOffset) + 2529 le32_to_cpu(context->DataLength) < 2530 sizeof(struct create_sd_buf_req)) 2531 return -EINVAL; 2532 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2533 le32_to_cpu(sd_buf->ccontext.DataLength), true); 2534 } 2535 2536 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2537 struct mnt_idmap *idmap, 2538 struct inode *inode) 2539 { 2540 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2541 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2542 2543 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2544 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2545 fattr->cf_mode = inode->i_mode; 2546 fattr->cf_acls = NULL; 2547 fattr->cf_dacls = NULL; 2548 2549 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2550 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2551 if (S_ISDIR(inode->i_mode)) 2552 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2553 } 2554 } 2555 2556 /** 2557 * smb2_open() - handler for smb file open request 2558 * @work: smb work containing request buffer 2559 * 2560 * Return: 0 on success, otherwise error 2561 */ 2562 int smb2_open(struct ksmbd_work *work) 2563 { 2564 struct ksmbd_conn *conn = work->conn; 2565 struct ksmbd_session *sess = work->sess; 2566 struct ksmbd_tree_connect *tcon = work->tcon; 2567 struct smb2_create_req *req; 2568 struct smb2_create_rsp *rsp; 2569 struct path path, parent_path; 2570 struct ksmbd_share_config *share = tcon->share_conf; 2571 struct ksmbd_file *fp = NULL; 2572 struct file *filp = NULL; 2573 struct mnt_idmap *idmap = NULL; 2574 struct kstat stat; 2575 struct create_context *context; 2576 struct lease_ctx_info *lc = NULL; 2577 struct create_ea_buf_req *ea_buf = NULL; 2578 struct oplock_info *opinfo; 2579 __le32 *next_ptr = NULL; 2580 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2581 int rc = 0; 2582 int contxt_cnt = 0, query_disk_id = 0; 2583 int maximal_access_ctxt = 0, posix_ctxt = 0; 2584 int s_type = 0; 2585 int next_off = 0; 2586 char *name = NULL; 2587 char *stream_name = NULL; 2588 bool file_present = false, created = false, already_permitted = false; 2589 int share_ret, need_truncate = 0; 2590 u64 time; 2591 umode_t posix_mode = 0; 2592 __le32 daccess, maximal_access = 0; 2593 2594 WORK_BUFFERS(work, req, rsp); 2595 2596 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2597 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2598 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2599 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2600 smb2_set_err_rsp(work); 2601 return -EINVAL; 2602 } 2603 2604 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2605 ksmbd_debug(SMB, "IPC pipe create request\n"); 2606 return create_smb2_pipe(work); 2607 } 2608 2609 if (req->NameLength) { 2610 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2611 *(char *)req->Buffer == '\\') { 2612 pr_err("not allow directory name included leading slash\n"); 2613 rc = -EINVAL; 2614 goto err_out1; 2615 } 2616 2617 name = smb2_get_name(req->Buffer, 2618 le16_to_cpu(req->NameLength), 2619 work->conn->local_nls); 2620 if (IS_ERR(name)) { 2621 rc = PTR_ERR(name); 2622 if (rc != -ENOMEM) 2623 rc = -ENOENT; 2624 name = NULL; 2625 goto err_out1; 2626 } 2627 2628 ksmbd_debug(SMB, "converted name = %s\n", name); 2629 if (strchr(name, ':')) { 2630 if (!test_share_config_flag(work->tcon->share_conf, 2631 KSMBD_SHARE_FLAG_STREAMS)) { 2632 rc = -EBADF; 2633 goto err_out1; 2634 } 2635 rc = parse_stream_name(name, &stream_name, &s_type); 2636 if (rc < 0) 2637 goto err_out1; 2638 } 2639 2640 rc = ksmbd_validate_filename(name); 2641 if (rc < 0) 2642 goto err_out1; 2643 2644 if (ksmbd_share_veto_filename(share, name)) { 2645 rc = -ENOENT; 2646 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2647 name); 2648 goto err_out1; 2649 } 2650 } else { 2651 name = kstrdup("", GFP_KERNEL); 2652 if (!name) { 2653 rc = -ENOMEM; 2654 goto err_out1; 2655 } 2656 } 2657 2658 req_op_level = req->RequestedOplockLevel; 2659 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 2660 lc = parse_lease_state(req); 2661 2662 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 2663 pr_err("Invalid impersonationlevel : 0x%x\n", 2664 le32_to_cpu(req->ImpersonationLevel)); 2665 rc = -EIO; 2666 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 2667 goto err_out1; 2668 } 2669 2670 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 2671 pr_err("Invalid create options : 0x%x\n", 2672 le32_to_cpu(req->CreateOptions)); 2673 rc = -EINVAL; 2674 goto err_out1; 2675 } else { 2676 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 2677 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 2678 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 2679 2680 if (req->CreateOptions & 2681 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 2682 FILE_RESERVE_OPFILTER_LE)) { 2683 rc = -EOPNOTSUPP; 2684 goto err_out1; 2685 } 2686 2687 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2688 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 2689 rc = -EINVAL; 2690 goto err_out1; 2691 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 2692 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 2693 } 2694 } 2695 } 2696 2697 if (le32_to_cpu(req->CreateDisposition) > 2698 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 2699 pr_err("Invalid create disposition : 0x%x\n", 2700 le32_to_cpu(req->CreateDisposition)); 2701 rc = -EINVAL; 2702 goto err_out1; 2703 } 2704 2705 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 2706 pr_err("Invalid desired access : 0x%x\n", 2707 le32_to_cpu(req->DesiredAccess)); 2708 rc = -EACCES; 2709 goto err_out1; 2710 } 2711 2712 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 2713 pr_err("Invalid file attribute : 0x%x\n", 2714 le32_to_cpu(req->FileAttributes)); 2715 rc = -EINVAL; 2716 goto err_out1; 2717 } 2718 2719 if (req->CreateContextsOffset) { 2720 /* Parse non-durable handle create contexts */ 2721 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 2722 if (IS_ERR(context)) { 2723 rc = PTR_ERR(context); 2724 goto err_out1; 2725 } else if (context) { 2726 ea_buf = (struct create_ea_buf_req *)context; 2727 if (le16_to_cpu(context->DataOffset) + 2728 le32_to_cpu(context->DataLength) < 2729 sizeof(struct create_ea_buf_req)) { 2730 rc = -EINVAL; 2731 goto err_out1; 2732 } 2733 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 2734 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2735 rc = -EACCES; 2736 goto err_out1; 2737 } 2738 } 2739 2740 context = smb2_find_context_vals(req, 2741 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 2742 if (IS_ERR(context)) { 2743 rc = PTR_ERR(context); 2744 goto err_out1; 2745 } else if (context) { 2746 ksmbd_debug(SMB, 2747 "get query maximal access context\n"); 2748 maximal_access_ctxt = 1; 2749 } 2750 2751 context = smb2_find_context_vals(req, 2752 SMB2_CREATE_TIMEWARP_REQUEST, 4); 2753 if (IS_ERR(context)) { 2754 rc = PTR_ERR(context); 2755 goto err_out1; 2756 } else if (context) { 2757 ksmbd_debug(SMB, "get timewarp context\n"); 2758 rc = -EBADF; 2759 goto err_out1; 2760 } 2761 2762 if (tcon->posix_extensions) { 2763 context = smb2_find_context_vals(req, 2764 SMB2_CREATE_TAG_POSIX, 16); 2765 if (IS_ERR(context)) { 2766 rc = PTR_ERR(context); 2767 goto err_out1; 2768 } else if (context) { 2769 struct create_posix *posix = 2770 (struct create_posix *)context; 2771 if (le16_to_cpu(context->DataOffset) + 2772 le32_to_cpu(context->DataLength) < 2773 sizeof(struct create_posix) - 4) { 2774 rc = -EINVAL; 2775 goto err_out1; 2776 } 2777 ksmbd_debug(SMB, "get posix context\n"); 2778 2779 posix_mode = le32_to_cpu(posix->Mode); 2780 posix_ctxt = 1; 2781 } 2782 } 2783 } 2784 2785 if (ksmbd_override_fsids(work)) { 2786 rc = -ENOMEM; 2787 goto err_out1; 2788 } 2789 2790 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, 2791 &parent_path, &path, 1); 2792 if (!rc) { 2793 file_present = true; 2794 2795 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 2796 /* 2797 * If file exists with under flags, return access 2798 * denied error. 2799 */ 2800 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 2801 req->CreateDisposition == FILE_OPEN_IF_LE) { 2802 rc = -EACCES; 2803 goto err_out; 2804 } 2805 2806 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2807 ksmbd_debug(SMB, 2808 "User does not have write permission\n"); 2809 rc = -EACCES; 2810 goto err_out; 2811 } 2812 } else if (d_is_symlink(path.dentry)) { 2813 rc = -EACCES; 2814 goto err_out; 2815 } 2816 2817 file_present = true; 2818 idmap = mnt_idmap(path.mnt); 2819 } else { 2820 if (rc != -ENOENT) 2821 goto err_out; 2822 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 2823 name, rc); 2824 rc = 0; 2825 } 2826 2827 if (stream_name) { 2828 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2829 if (s_type == DATA_STREAM) { 2830 rc = -EIO; 2831 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2832 } 2833 } else { 2834 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 2835 s_type == DATA_STREAM) { 2836 rc = -EIO; 2837 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2838 } 2839 } 2840 2841 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 2842 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 2843 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2844 rc = -EIO; 2845 } 2846 2847 if (rc < 0) 2848 goto err_out; 2849 } 2850 2851 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 2852 S_ISDIR(d_inode(path.dentry)->i_mode) && 2853 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2854 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 2855 name, req->CreateOptions); 2856 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2857 rc = -EIO; 2858 goto err_out; 2859 } 2860 2861 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2862 !(req->CreateDisposition == FILE_CREATE_LE) && 2863 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 2864 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2865 rc = -EIO; 2866 goto err_out; 2867 } 2868 2869 if (!stream_name && file_present && 2870 req->CreateDisposition == FILE_CREATE_LE) { 2871 rc = -EEXIST; 2872 goto err_out; 2873 } 2874 2875 daccess = smb_map_generic_desired_access(req->DesiredAccess); 2876 2877 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2878 rc = smb_check_perm_dacl(conn, &path, &daccess, 2879 sess->user->uid); 2880 if (rc) 2881 goto err_out; 2882 } 2883 2884 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 2885 if (!file_present) { 2886 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 2887 } else { 2888 ksmbd_vfs_query_maximal_access(idmap, 2889 path.dentry, 2890 &daccess); 2891 already_permitted = true; 2892 } 2893 maximal_access = daccess; 2894 } 2895 2896 open_flags = smb2_create_open_flags(file_present, daccess, 2897 req->CreateDisposition, 2898 &may_flags); 2899 2900 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2901 if (open_flags & O_CREAT) { 2902 ksmbd_debug(SMB, 2903 "User does not have write permission\n"); 2904 rc = -EACCES; 2905 goto err_out; 2906 } 2907 } 2908 2909 /*create file if not present */ 2910 if (!file_present) { 2911 rc = smb2_creat(work, &parent_path, &path, name, open_flags, 2912 posix_mode, 2913 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 2914 if (rc) { 2915 if (rc == -ENOENT) { 2916 rc = -EIO; 2917 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 2918 } 2919 goto err_out; 2920 } 2921 2922 created = true; 2923 idmap = mnt_idmap(path.mnt); 2924 if (ea_buf) { 2925 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 2926 sizeof(struct smb2_ea_info)) { 2927 rc = -EINVAL; 2928 goto err_out; 2929 } 2930 2931 rc = smb2_set_ea(&ea_buf->ea, 2932 le32_to_cpu(ea_buf->ccontext.DataLength), 2933 &path); 2934 if (rc == -EOPNOTSUPP) 2935 rc = 0; 2936 else if (rc) 2937 goto err_out; 2938 } 2939 } else if (!already_permitted) { 2940 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 2941 * because execute(search) permission on a parent directory, 2942 * is already granted. 2943 */ 2944 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 2945 rc = inode_permission(idmap, 2946 d_inode(path.dentry), 2947 may_flags); 2948 if (rc) 2949 goto err_out; 2950 2951 if ((daccess & FILE_DELETE_LE) || 2952 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2953 rc = inode_permission(idmap, 2954 d_inode(path.dentry->d_parent), 2955 MAY_EXEC | MAY_WRITE); 2956 if (rc) 2957 goto err_out; 2958 } 2959 } 2960 } 2961 2962 rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent)); 2963 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 2964 rc = -EBUSY; 2965 goto err_out; 2966 } 2967 2968 rc = 0; 2969 filp = dentry_open(&path, open_flags, current_cred()); 2970 if (IS_ERR(filp)) { 2971 rc = PTR_ERR(filp); 2972 pr_err("dentry open for dir failed, rc %d\n", rc); 2973 goto err_out; 2974 } 2975 2976 if (file_present) { 2977 if (!(open_flags & O_TRUNC)) 2978 file_info = FILE_OPENED; 2979 else 2980 file_info = FILE_OVERWRITTEN; 2981 2982 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 2983 FILE_SUPERSEDE_LE) 2984 file_info = FILE_SUPERSEDED; 2985 } else if (open_flags & O_CREAT) { 2986 file_info = FILE_CREATED; 2987 } 2988 2989 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 2990 2991 /* Obtain Volatile-ID */ 2992 fp = ksmbd_open_fd(work, filp); 2993 if (IS_ERR(fp)) { 2994 fput(filp); 2995 rc = PTR_ERR(fp); 2996 fp = NULL; 2997 goto err_out; 2998 } 2999 3000 /* Get Persistent-ID */ 3001 ksmbd_open_durable_fd(fp); 3002 if (!has_file_id(fp->persistent_id)) { 3003 rc = -ENOMEM; 3004 goto err_out; 3005 } 3006 3007 fp->cdoption = req->CreateDisposition; 3008 fp->daccess = daccess; 3009 fp->saccess = req->ShareAccess; 3010 fp->coption = req->CreateOptions; 3011 3012 /* Set default windows and posix acls if creating new file */ 3013 if (created) { 3014 int posix_acl_rc; 3015 struct inode *inode = d_inode(path.dentry); 3016 3017 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3018 &path, 3019 d_inode(path.dentry->d_parent)); 3020 if (posix_acl_rc) 3021 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3022 3023 if (test_share_config_flag(work->tcon->share_conf, 3024 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3025 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3026 sess->user->gid); 3027 } 3028 3029 if (rc) { 3030 rc = smb2_create_sd_buffer(work, req, &path); 3031 if (rc) { 3032 if (posix_acl_rc) 3033 ksmbd_vfs_set_init_posix_acl(idmap, 3034 &path); 3035 3036 if (test_share_config_flag(work->tcon->share_conf, 3037 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3038 struct smb_fattr fattr; 3039 struct smb_ntsd *pntsd; 3040 int pntsd_size, ace_num = 0; 3041 3042 ksmbd_acls_fattr(&fattr, idmap, inode); 3043 if (fattr.cf_acls) 3044 ace_num = fattr.cf_acls->a_count; 3045 if (fattr.cf_dacls) 3046 ace_num += fattr.cf_dacls->a_count; 3047 3048 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3049 sizeof(struct smb_sid) * 3 + 3050 sizeof(struct smb_acl) + 3051 sizeof(struct smb_ace) * ace_num * 2, 3052 GFP_KERNEL); 3053 if (!pntsd) { 3054 posix_acl_release(fattr.cf_acls); 3055 posix_acl_release(fattr.cf_dacls); 3056 goto err_out; 3057 } 3058 3059 rc = build_sec_desc(idmap, 3060 pntsd, NULL, 0, 3061 OWNER_SECINFO | 3062 GROUP_SECINFO | 3063 DACL_SECINFO, 3064 &pntsd_size, &fattr); 3065 posix_acl_release(fattr.cf_acls); 3066 posix_acl_release(fattr.cf_dacls); 3067 if (rc) { 3068 kfree(pntsd); 3069 goto err_out; 3070 } 3071 3072 rc = ksmbd_vfs_set_sd_xattr(conn, 3073 idmap, 3074 &path, 3075 pntsd, 3076 pntsd_size); 3077 kfree(pntsd); 3078 if (rc) 3079 pr_err("failed to store ntacl in xattr : %d\n", 3080 rc); 3081 } 3082 } 3083 } 3084 rc = 0; 3085 } 3086 3087 if (stream_name) { 3088 rc = smb2_set_stream_name_xattr(&path, 3089 fp, 3090 stream_name, 3091 s_type); 3092 if (rc) 3093 goto err_out; 3094 file_info = FILE_CREATED; 3095 } 3096 3097 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3098 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3099 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3100 !fp->attrib_only && !stream_name) { 3101 smb_break_all_oplock(work, fp); 3102 need_truncate = 1; 3103 } 3104 3105 /* fp should be searchable through ksmbd_inode.m_fp_list 3106 * after daccess, saccess, attrib_only, and stream are 3107 * initialized. 3108 */ 3109 write_lock(&fp->f_ci->m_lock); 3110 list_add(&fp->node, &fp->f_ci->m_fp_list); 3111 write_unlock(&fp->f_ci->m_lock); 3112 3113 /* Check delete pending among previous fp before oplock break */ 3114 if (ksmbd_inode_pending_delete(fp)) { 3115 rc = -EBUSY; 3116 goto err_out; 3117 } 3118 3119 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3120 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3121 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3122 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3123 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3124 rc = share_ret; 3125 goto err_out; 3126 } 3127 } else { 3128 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) { 3129 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3130 ksmbd_debug(SMB, 3131 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3132 name, req_op_level, lc->req_state); 3133 rc = find_same_lease_key(sess, fp->f_ci, lc); 3134 if (rc) 3135 goto err_out; 3136 } else if (open_flags == O_RDONLY && 3137 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3138 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3139 req_op_level = SMB2_OPLOCK_LEVEL_II; 3140 3141 rc = smb_grant_oplock(work, req_op_level, 3142 fp->persistent_id, fp, 3143 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3144 lc, share_ret); 3145 if (rc < 0) 3146 goto err_out; 3147 } 3148 3149 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3150 ksmbd_fd_set_delete_on_close(fp, file_info); 3151 3152 if (need_truncate) { 3153 rc = smb2_create_truncate(&path); 3154 if (rc) 3155 goto err_out; 3156 } 3157 3158 if (req->CreateContextsOffset) { 3159 struct create_alloc_size_req *az_req; 3160 3161 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3162 SMB2_CREATE_ALLOCATION_SIZE, 4); 3163 if (IS_ERR(az_req)) { 3164 rc = PTR_ERR(az_req); 3165 goto err_out; 3166 } else if (az_req) { 3167 loff_t alloc_size; 3168 int err; 3169 3170 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3171 le32_to_cpu(az_req->ccontext.DataLength) < 3172 sizeof(struct create_alloc_size_req)) { 3173 rc = -EINVAL; 3174 goto err_out; 3175 } 3176 alloc_size = le64_to_cpu(az_req->AllocationSize); 3177 ksmbd_debug(SMB, 3178 "request smb2 create allocate size : %llu\n", 3179 alloc_size); 3180 smb_break_all_levII_oplock(work, fp, 1); 3181 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3182 alloc_size); 3183 if (err < 0) 3184 ksmbd_debug(SMB, 3185 "vfs_fallocate is failed : %d\n", 3186 err); 3187 } 3188 3189 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3190 if (IS_ERR(context)) { 3191 rc = PTR_ERR(context); 3192 goto err_out; 3193 } else if (context) { 3194 ksmbd_debug(SMB, "get query on disk id context\n"); 3195 query_disk_id = 1; 3196 } 3197 } 3198 3199 rc = ksmbd_vfs_getattr(&path, &stat); 3200 if (rc) 3201 goto err_out; 3202 3203 if (stat.result_mask & STATX_BTIME) 3204 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3205 else 3206 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3207 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3208 fp->f_ci->m_fattr = 3209 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3210 3211 if (!created) 3212 smb2_update_xattrs(tcon, &path, fp); 3213 else 3214 smb2_new_xattrs(tcon, &path, fp); 3215 3216 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3217 3218 rsp->StructureSize = cpu_to_le16(89); 3219 rcu_read_lock(); 3220 opinfo = rcu_dereference(fp->f_opinfo); 3221 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3222 rcu_read_unlock(); 3223 rsp->Flags = 0; 3224 rsp->CreateAction = cpu_to_le32(file_info); 3225 rsp->CreationTime = cpu_to_le64(fp->create_time); 3226 time = ksmbd_UnixTimeToNT(stat.atime); 3227 rsp->LastAccessTime = cpu_to_le64(time); 3228 time = ksmbd_UnixTimeToNT(stat.mtime); 3229 rsp->LastWriteTime = cpu_to_le64(time); 3230 time = ksmbd_UnixTimeToNT(stat.ctime); 3231 rsp->ChangeTime = cpu_to_le64(time); 3232 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3233 cpu_to_le64(stat.blocks << 9); 3234 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3235 rsp->FileAttributes = fp->f_ci->m_fattr; 3236 3237 rsp->Reserved2 = 0; 3238 3239 rsp->PersistentFileId = fp->persistent_id; 3240 rsp->VolatileFileId = fp->volatile_id; 3241 3242 rsp->CreateContextsOffset = 0; 3243 rsp->CreateContextsLength = 0; 3244 inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/ 3245 3246 /* If lease is request send lease context response */ 3247 if (opinfo && opinfo->is_lease) { 3248 struct create_context *lease_ccontext; 3249 3250 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3251 name, opinfo->o_lease->state); 3252 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3253 3254 lease_ccontext = (struct create_context *)rsp->Buffer; 3255 contxt_cnt++; 3256 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3257 le32_add_cpu(&rsp->CreateContextsLength, 3258 conn->vals->create_lease_size); 3259 inc_rfc1001_len(work->response_buf, 3260 conn->vals->create_lease_size); 3261 next_ptr = &lease_ccontext->Next; 3262 next_off = conn->vals->create_lease_size; 3263 } 3264 3265 if (maximal_access_ctxt) { 3266 struct create_context *mxac_ccontext; 3267 3268 if (maximal_access == 0) 3269 ksmbd_vfs_query_maximal_access(idmap, 3270 path.dentry, 3271 &maximal_access); 3272 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3273 le32_to_cpu(rsp->CreateContextsLength)); 3274 contxt_cnt++; 3275 create_mxac_rsp_buf(rsp->Buffer + 3276 le32_to_cpu(rsp->CreateContextsLength), 3277 le32_to_cpu(maximal_access)); 3278 le32_add_cpu(&rsp->CreateContextsLength, 3279 conn->vals->create_mxac_size); 3280 inc_rfc1001_len(work->response_buf, 3281 conn->vals->create_mxac_size); 3282 if (next_ptr) 3283 *next_ptr = cpu_to_le32(next_off); 3284 next_ptr = &mxac_ccontext->Next; 3285 next_off = conn->vals->create_mxac_size; 3286 } 3287 3288 if (query_disk_id) { 3289 struct create_context *disk_id_ccontext; 3290 3291 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3292 le32_to_cpu(rsp->CreateContextsLength)); 3293 contxt_cnt++; 3294 create_disk_id_rsp_buf(rsp->Buffer + 3295 le32_to_cpu(rsp->CreateContextsLength), 3296 stat.ino, tcon->id); 3297 le32_add_cpu(&rsp->CreateContextsLength, 3298 conn->vals->create_disk_id_size); 3299 inc_rfc1001_len(work->response_buf, 3300 conn->vals->create_disk_id_size); 3301 if (next_ptr) 3302 *next_ptr = cpu_to_le32(next_off); 3303 next_ptr = &disk_id_ccontext->Next; 3304 next_off = conn->vals->create_disk_id_size; 3305 } 3306 3307 if (posix_ctxt) { 3308 contxt_cnt++; 3309 create_posix_rsp_buf(rsp->Buffer + 3310 le32_to_cpu(rsp->CreateContextsLength), 3311 fp); 3312 le32_add_cpu(&rsp->CreateContextsLength, 3313 conn->vals->create_posix_size); 3314 inc_rfc1001_len(work->response_buf, 3315 conn->vals->create_posix_size); 3316 if (next_ptr) 3317 *next_ptr = cpu_to_le32(next_off); 3318 } 3319 3320 if (contxt_cnt > 0) { 3321 rsp->CreateContextsOffset = 3322 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3323 } 3324 3325 err_out: 3326 if (file_present || created) { 3327 inode_unlock(d_inode(parent_path.dentry)); 3328 path_put(&path); 3329 path_put(&parent_path); 3330 } 3331 ksmbd_revert_fsids(work); 3332 err_out1: 3333 3334 if (rc) { 3335 if (rc == -EINVAL) 3336 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3337 else if (rc == -EOPNOTSUPP) 3338 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3339 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3340 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3341 else if (rc == -ENOENT) 3342 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3343 else if (rc == -EPERM) 3344 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3345 else if (rc == -EBUSY) 3346 rsp->hdr.Status = STATUS_DELETE_PENDING; 3347 else if (rc == -EBADF) 3348 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3349 else if (rc == -ENOEXEC) 3350 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3351 else if (rc == -ENXIO) 3352 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3353 else if (rc == -EEXIST) 3354 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3355 else if (rc == -EMFILE) 3356 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3357 if (!rsp->hdr.Status) 3358 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3359 3360 if (fp) 3361 ksmbd_fd_put(work, fp); 3362 smb2_set_err_rsp(work); 3363 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3364 } 3365 3366 kfree(name); 3367 kfree(lc); 3368 3369 return 0; 3370 } 3371 3372 static int readdir_info_level_struct_sz(int info_level) 3373 { 3374 switch (info_level) { 3375 case FILE_FULL_DIRECTORY_INFORMATION: 3376 return sizeof(struct file_full_directory_info); 3377 case FILE_BOTH_DIRECTORY_INFORMATION: 3378 return sizeof(struct file_both_directory_info); 3379 case FILE_DIRECTORY_INFORMATION: 3380 return sizeof(struct file_directory_info); 3381 case FILE_NAMES_INFORMATION: 3382 return sizeof(struct file_names_info); 3383 case FILEID_FULL_DIRECTORY_INFORMATION: 3384 return sizeof(struct file_id_full_dir_info); 3385 case FILEID_BOTH_DIRECTORY_INFORMATION: 3386 return sizeof(struct file_id_both_directory_info); 3387 case SMB_FIND_FILE_POSIX_INFO: 3388 return sizeof(struct smb2_posix_info); 3389 default: 3390 return -EOPNOTSUPP; 3391 } 3392 } 3393 3394 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3395 { 3396 switch (info_level) { 3397 case FILE_FULL_DIRECTORY_INFORMATION: 3398 { 3399 struct file_full_directory_info *ffdinfo; 3400 3401 ffdinfo = (struct file_full_directory_info *)d_info->rptr; 3402 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3403 d_info->name = ffdinfo->FileName; 3404 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3405 return 0; 3406 } 3407 case FILE_BOTH_DIRECTORY_INFORMATION: 3408 { 3409 struct file_both_directory_info *fbdinfo; 3410 3411 fbdinfo = (struct file_both_directory_info *)d_info->rptr; 3412 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3413 d_info->name = fbdinfo->FileName; 3414 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3415 return 0; 3416 } 3417 case FILE_DIRECTORY_INFORMATION: 3418 { 3419 struct file_directory_info *fdinfo; 3420 3421 fdinfo = (struct file_directory_info *)d_info->rptr; 3422 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3423 d_info->name = fdinfo->FileName; 3424 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3425 return 0; 3426 } 3427 case FILE_NAMES_INFORMATION: 3428 { 3429 struct file_names_info *fninfo; 3430 3431 fninfo = (struct file_names_info *)d_info->rptr; 3432 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3433 d_info->name = fninfo->FileName; 3434 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3435 return 0; 3436 } 3437 case FILEID_FULL_DIRECTORY_INFORMATION: 3438 { 3439 struct file_id_full_dir_info *dinfo; 3440 3441 dinfo = (struct file_id_full_dir_info *)d_info->rptr; 3442 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3443 d_info->name = dinfo->FileName; 3444 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3445 return 0; 3446 } 3447 case FILEID_BOTH_DIRECTORY_INFORMATION: 3448 { 3449 struct file_id_both_directory_info *fibdinfo; 3450 3451 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3452 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3453 d_info->name = fibdinfo->FileName; 3454 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3455 return 0; 3456 } 3457 case SMB_FIND_FILE_POSIX_INFO: 3458 { 3459 struct smb2_posix_info *posix_info; 3460 3461 posix_info = (struct smb2_posix_info *)d_info->rptr; 3462 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3463 d_info->name = posix_info->name; 3464 d_info->name_len = le32_to_cpu(posix_info->name_len); 3465 return 0; 3466 } 3467 default: 3468 return -EINVAL; 3469 } 3470 } 3471 3472 /** 3473 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3474 * buffer 3475 * @conn: connection instance 3476 * @info_level: smb information level 3477 * @d_info: structure included variables for query dir 3478 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3479 * 3480 * if directory has many entries, find first can't read it fully. 3481 * find next might be called multiple times to read remaining dir entries 3482 * 3483 * Return: 0 on success, otherwise error 3484 */ 3485 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3486 struct ksmbd_dir_info *d_info, 3487 struct ksmbd_kstat *ksmbd_kstat) 3488 { 3489 int next_entry_offset = 0; 3490 char *conv_name; 3491 int conv_len; 3492 void *kstat; 3493 int struct_sz, rc = 0; 3494 3495 conv_name = ksmbd_convert_dir_info_name(d_info, 3496 conn->local_nls, 3497 &conv_len); 3498 if (!conv_name) 3499 return -ENOMEM; 3500 3501 /* Somehow the name has only terminating NULL bytes */ 3502 if (conv_len < 0) { 3503 rc = -EINVAL; 3504 goto free_conv_name; 3505 } 3506 3507 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3508 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3509 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3510 3511 if (next_entry_offset > d_info->out_buf_len) { 3512 d_info->out_buf_len = 0; 3513 rc = -ENOSPC; 3514 goto free_conv_name; 3515 } 3516 3517 kstat = d_info->wptr; 3518 if (info_level != FILE_NAMES_INFORMATION) 3519 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3520 3521 switch (info_level) { 3522 case FILE_FULL_DIRECTORY_INFORMATION: 3523 { 3524 struct file_full_directory_info *ffdinfo; 3525 3526 ffdinfo = (struct file_full_directory_info *)kstat; 3527 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3528 ffdinfo->EaSize = 3529 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3530 if (ffdinfo->EaSize) 3531 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3532 if (d_info->hide_dot_file && d_info->name[0] == '.') 3533 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3534 memcpy(ffdinfo->FileName, conv_name, conv_len); 3535 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3536 break; 3537 } 3538 case FILE_BOTH_DIRECTORY_INFORMATION: 3539 { 3540 struct file_both_directory_info *fbdinfo; 3541 3542 fbdinfo = (struct file_both_directory_info *)kstat; 3543 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3544 fbdinfo->EaSize = 3545 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3546 if (fbdinfo->EaSize) 3547 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3548 fbdinfo->ShortNameLength = 0; 3549 fbdinfo->Reserved = 0; 3550 if (d_info->hide_dot_file && d_info->name[0] == '.') 3551 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3552 memcpy(fbdinfo->FileName, conv_name, conv_len); 3553 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3554 break; 3555 } 3556 case FILE_DIRECTORY_INFORMATION: 3557 { 3558 struct file_directory_info *fdinfo; 3559 3560 fdinfo = (struct file_directory_info *)kstat; 3561 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3562 if (d_info->hide_dot_file && d_info->name[0] == '.') 3563 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3564 memcpy(fdinfo->FileName, conv_name, conv_len); 3565 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3566 break; 3567 } 3568 case FILE_NAMES_INFORMATION: 3569 { 3570 struct file_names_info *fninfo; 3571 3572 fninfo = (struct file_names_info *)kstat; 3573 fninfo->FileNameLength = cpu_to_le32(conv_len); 3574 memcpy(fninfo->FileName, conv_name, conv_len); 3575 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3576 break; 3577 } 3578 case FILEID_FULL_DIRECTORY_INFORMATION: 3579 { 3580 struct file_id_full_dir_info *dinfo; 3581 3582 dinfo = (struct file_id_full_dir_info *)kstat; 3583 dinfo->FileNameLength = cpu_to_le32(conv_len); 3584 dinfo->EaSize = 3585 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3586 if (dinfo->EaSize) 3587 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3588 dinfo->Reserved = 0; 3589 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3590 if (d_info->hide_dot_file && d_info->name[0] == '.') 3591 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3592 memcpy(dinfo->FileName, conv_name, conv_len); 3593 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3594 break; 3595 } 3596 case FILEID_BOTH_DIRECTORY_INFORMATION: 3597 { 3598 struct file_id_both_directory_info *fibdinfo; 3599 3600 fibdinfo = (struct file_id_both_directory_info *)kstat; 3601 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 3602 fibdinfo->EaSize = 3603 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3604 if (fibdinfo->EaSize) 3605 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3606 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3607 fibdinfo->ShortNameLength = 0; 3608 fibdinfo->Reserved = 0; 3609 fibdinfo->Reserved2 = cpu_to_le16(0); 3610 if (d_info->hide_dot_file && d_info->name[0] == '.') 3611 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3612 memcpy(fibdinfo->FileName, conv_name, conv_len); 3613 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3614 break; 3615 } 3616 case SMB_FIND_FILE_POSIX_INFO: 3617 { 3618 struct smb2_posix_info *posix_info; 3619 u64 time; 3620 3621 posix_info = (struct smb2_posix_info *)kstat; 3622 posix_info->Ignored = 0; 3623 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 3624 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 3625 posix_info->ChangeTime = cpu_to_le64(time); 3626 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 3627 posix_info->LastAccessTime = cpu_to_le64(time); 3628 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 3629 posix_info->LastWriteTime = cpu_to_le64(time); 3630 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 3631 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 3632 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 3633 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 3634 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 3635 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 3636 posix_info->DosAttributes = 3637 S_ISDIR(ksmbd_kstat->kstat->mode) ? 3638 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 3639 if (d_info->hide_dot_file && d_info->name[0] == '.') 3640 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3641 /* 3642 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 3643 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 3644 * sub_auth(4 * 1(num_subauth)) + RID(4). 3645 */ 3646 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 3647 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 3648 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 3649 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 3650 memcpy(posix_info->name, conv_name, conv_len); 3651 posix_info->name_len = cpu_to_le32(conv_len); 3652 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 3653 break; 3654 } 3655 3656 } /* switch (info_level) */ 3657 3658 d_info->last_entry_offset = d_info->data_count; 3659 d_info->data_count += next_entry_offset; 3660 d_info->out_buf_len -= next_entry_offset; 3661 d_info->wptr += next_entry_offset; 3662 3663 ksmbd_debug(SMB, 3664 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 3665 info_level, d_info->out_buf_len, 3666 next_entry_offset, d_info->data_count); 3667 3668 free_conv_name: 3669 kfree(conv_name); 3670 return rc; 3671 } 3672 3673 struct smb2_query_dir_private { 3674 struct ksmbd_work *work; 3675 char *search_pattern; 3676 struct ksmbd_file *dir_fp; 3677 3678 struct ksmbd_dir_info *d_info; 3679 int info_level; 3680 }; 3681 3682 static void lock_dir(struct ksmbd_file *dir_fp) 3683 { 3684 struct dentry *dir = dir_fp->filp->f_path.dentry; 3685 3686 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); 3687 } 3688 3689 static void unlock_dir(struct ksmbd_file *dir_fp) 3690 { 3691 struct dentry *dir = dir_fp->filp->f_path.dentry; 3692 3693 inode_unlock(d_inode(dir)); 3694 } 3695 3696 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 3697 { 3698 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 3699 struct kstat kstat; 3700 struct ksmbd_kstat ksmbd_kstat; 3701 int rc; 3702 int i; 3703 3704 for (i = 0; i < priv->d_info->num_entry; i++) { 3705 struct dentry *dent; 3706 3707 if (dentry_name(priv->d_info, priv->info_level)) 3708 return -EINVAL; 3709 3710 lock_dir(priv->dir_fp); 3711 dent = lookup_one(idmap, priv->d_info->name, 3712 priv->dir_fp->filp->f_path.dentry, 3713 priv->d_info->name_len); 3714 unlock_dir(priv->dir_fp); 3715 3716 if (IS_ERR(dent)) { 3717 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 3718 priv->d_info->name, 3719 PTR_ERR(dent)); 3720 continue; 3721 } 3722 if (unlikely(d_is_negative(dent))) { 3723 dput(dent); 3724 ksmbd_debug(SMB, "Negative dentry `%s'\n", 3725 priv->d_info->name); 3726 continue; 3727 } 3728 3729 ksmbd_kstat.kstat = &kstat; 3730 if (priv->info_level != FILE_NAMES_INFORMATION) 3731 ksmbd_vfs_fill_dentry_attrs(priv->work, 3732 idmap, 3733 dent, 3734 &ksmbd_kstat); 3735 3736 rc = smb2_populate_readdir_entry(priv->work->conn, 3737 priv->info_level, 3738 priv->d_info, 3739 &ksmbd_kstat); 3740 dput(dent); 3741 if (rc) 3742 return rc; 3743 } 3744 return 0; 3745 } 3746 3747 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 3748 int info_level) 3749 { 3750 int struct_sz; 3751 int conv_len; 3752 int next_entry_offset; 3753 3754 struct_sz = readdir_info_level_struct_sz(info_level); 3755 if (struct_sz == -EOPNOTSUPP) 3756 return -EOPNOTSUPP; 3757 3758 conv_len = (d_info->name_len + 1) * 2; 3759 next_entry_offset = ALIGN(struct_sz + conv_len, 3760 KSMBD_DIR_INFO_ALIGNMENT); 3761 3762 if (next_entry_offset > d_info->out_buf_len) { 3763 d_info->out_buf_len = 0; 3764 return -ENOSPC; 3765 } 3766 3767 switch (info_level) { 3768 case FILE_FULL_DIRECTORY_INFORMATION: 3769 { 3770 struct file_full_directory_info *ffdinfo; 3771 3772 ffdinfo = (struct file_full_directory_info *)d_info->wptr; 3773 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 3774 ffdinfo->FileName[d_info->name_len] = 0x00; 3775 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3776 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3777 break; 3778 } 3779 case FILE_BOTH_DIRECTORY_INFORMATION: 3780 { 3781 struct file_both_directory_info *fbdinfo; 3782 3783 fbdinfo = (struct file_both_directory_info *)d_info->wptr; 3784 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 3785 fbdinfo->FileName[d_info->name_len] = 0x00; 3786 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3787 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3788 break; 3789 } 3790 case FILE_DIRECTORY_INFORMATION: 3791 { 3792 struct file_directory_info *fdinfo; 3793 3794 fdinfo = (struct file_directory_info *)d_info->wptr; 3795 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 3796 fdinfo->FileName[d_info->name_len] = 0x00; 3797 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3798 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3799 break; 3800 } 3801 case FILE_NAMES_INFORMATION: 3802 { 3803 struct file_names_info *fninfo; 3804 3805 fninfo = (struct file_names_info *)d_info->wptr; 3806 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 3807 fninfo->FileName[d_info->name_len] = 0x00; 3808 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 3809 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3810 break; 3811 } 3812 case FILEID_FULL_DIRECTORY_INFORMATION: 3813 { 3814 struct file_id_full_dir_info *dinfo; 3815 3816 dinfo = (struct file_id_full_dir_info *)d_info->wptr; 3817 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 3818 dinfo->FileName[d_info->name_len] = 0x00; 3819 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3820 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3821 break; 3822 } 3823 case FILEID_BOTH_DIRECTORY_INFORMATION: 3824 { 3825 struct file_id_both_directory_info *fibdinfo; 3826 3827 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 3828 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 3829 fibdinfo->FileName[d_info->name_len] = 0x00; 3830 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3831 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3832 break; 3833 } 3834 case SMB_FIND_FILE_POSIX_INFO: 3835 { 3836 struct smb2_posix_info *posix_info; 3837 3838 posix_info = (struct smb2_posix_info *)d_info->wptr; 3839 memcpy(posix_info->name, d_info->name, d_info->name_len); 3840 posix_info->name[d_info->name_len] = 0x00; 3841 posix_info->name_len = cpu_to_le32(d_info->name_len); 3842 posix_info->NextEntryOffset = 3843 cpu_to_le32(next_entry_offset); 3844 break; 3845 } 3846 } /* switch (info_level) */ 3847 3848 d_info->num_entry++; 3849 d_info->out_buf_len -= next_entry_offset; 3850 d_info->wptr += next_entry_offset; 3851 return 0; 3852 } 3853 3854 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 3855 loff_t offset, u64 ino, unsigned int d_type) 3856 { 3857 struct ksmbd_readdir_data *buf; 3858 struct smb2_query_dir_private *priv; 3859 struct ksmbd_dir_info *d_info; 3860 int rc; 3861 3862 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 3863 priv = buf->private; 3864 d_info = priv->d_info; 3865 3866 /* dot and dotdot entries are already reserved */ 3867 if (!strcmp(".", name) || !strcmp("..", name)) 3868 return true; 3869 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 3870 return true; 3871 if (!match_pattern(name, namlen, priv->search_pattern)) 3872 return true; 3873 3874 d_info->name = name; 3875 d_info->name_len = namlen; 3876 rc = reserve_populate_dentry(d_info, priv->info_level); 3877 if (rc) 3878 return false; 3879 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 3880 d_info->out_buf_len = 0; 3881 return true; 3882 } 3883 3884 static int verify_info_level(int info_level) 3885 { 3886 switch (info_level) { 3887 case FILE_FULL_DIRECTORY_INFORMATION: 3888 case FILE_BOTH_DIRECTORY_INFORMATION: 3889 case FILE_DIRECTORY_INFORMATION: 3890 case FILE_NAMES_INFORMATION: 3891 case FILEID_FULL_DIRECTORY_INFORMATION: 3892 case FILEID_BOTH_DIRECTORY_INFORMATION: 3893 case SMB_FIND_FILE_POSIX_INFO: 3894 break; 3895 default: 3896 return -EOPNOTSUPP; 3897 } 3898 3899 return 0; 3900 } 3901 3902 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 3903 { 3904 int free_len; 3905 3906 free_len = (int)(work->response_sz - 3907 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 3908 return free_len; 3909 } 3910 3911 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 3912 unsigned short hdr2_len, 3913 unsigned int out_buf_len) 3914 { 3915 int free_len; 3916 3917 if (out_buf_len > work->conn->vals->max_trans_size) 3918 return -EINVAL; 3919 3920 free_len = smb2_resp_buf_len(work, hdr2_len); 3921 if (free_len < 0) 3922 return -EINVAL; 3923 3924 return min_t(int, out_buf_len, free_len); 3925 } 3926 3927 int smb2_query_dir(struct ksmbd_work *work) 3928 { 3929 struct ksmbd_conn *conn = work->conn; 3930 struct smb2_query_directory_req *req; 3931 struct smb2_query_directory_rsp *rsp; 3932 struct ksmbd_share_config *share = work->tcon->share_conf; 3933 struct ksmbd_file *dir_fp = NULL; 3934 struct ksmbd_dir_info d_info; 3935 int rc = 0; 3936 char *srch_ptr = NULL; 3937 unsigned char srch_flag; 3938 int buffer_sz; 3939 struct smb2_query_dir_private query_dir_private = {NULL, }; 3940 3941 WORK_BUFFERS(work, req, rsp); 3942 3943 if (ksmbd_override_fsids(work)) { 3944 rsp->hdr.Status = STATUS_NO_MEMORY; 3945 smb2_set_err_rsp(work); 3946 return -ENOMEM; 3947 } 3948 3949 rc = verify_info_level(req->FileInformationClass); 3950 if (rc) { 3951 rc = -EFAULT; 3952 goto err_out2; 3953 } 3954 3955 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 3956 if (!dir_fp) { 3957 rc = -EBADF; 3958 goto err_out2; 3959 } 3960 3961 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 3962 inode_permission(file_mnt_idmap(dir_fp->filp), 3963 file_inode(dir_fp->filp), 3964 MAY_READ | MAY_EXEC)) { 3965 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 3966 rc = -EACCES; 3967 goto err_out2; 3968 } 3969 3970 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 3971 pr_err("can't do query dir for a file\n"); 3972 rc = -EINVAL; 3973 goto err_out2; 3974 } 3975 3976 srch_flag = req->Flags; 3977 srch_ptr = smb_strndup_from_utf16(req->Buffer, 3978 le16_to_cpu(req->FileNameLength), 1, 3979 conn->local_nls); 3980 if (IS_ERR(srch_ptr)) { 3981 ksmbd_debug(SMB, "Search Pattern not found\n"); 3982 rc = -EINVAL; 3983 goto err_out2; 3984 } else { 3985 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 3986 } 3987 3988 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 3989 ksmbd_debug(SMB, "Restart directory scan\n"); 3990 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 3991 } 3992 3993 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 3994 d_info.wptr = (char *)rsp->Buffer; 3995 d_info.rptr = (char *)rsp->Buffer; 3996 d_info.out_buf_len = 3997 smb2_calc_max_out_buf_len(work, 8, 3998 le32_to_cpu(req->OutputBufferLength)); 3999 if (d_info.out_buf_len < 0) { 4000 rc = -EINVAL; 4001 goto err_out; 4002 } 4003 d_info.flags = srch_flag; 4004 4005 /* 4006 * reserve dot and dotdot entries in head of buffer 4007 * in first response 4008 */ 4009 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4010 dir_fp, &d_info, srch_ptr, 4011 smb2_populate_readdir_entry); 4012 if (rc == -ENOSPC) 4013 rc = 0; 4014 else if (rc) 4015 goto err_out; 4016 4017 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4018 d_info.hide_dot_file = true; 4019 4020 buffer_sz = d_info.out_buf_len; 4021 d_info.rptr = d_info.wptr; 4022 query_dir_private.work = work; 4023 query_dir_private.search_pattern = srch_ptr; 4024 query_dir_private.dir_fp = dir_fp; 4025 query_dir_private.d_info = &d_info; 4026 query_dir_private.info_level = req->FileInformationClass; 4027 dir_fp->readdir_data.private = &query_dir_private; 4028 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4029 4030 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4031 /* 4032 * req->OutputBufferLength is too small to contain even one entry. 4033 * In this case, it immediately returns OutputBufferLength 0 to client. 4034 */ 4035 if (!d_info.out_buf_len && !d_info.num_entry) 4036 goto no_buf_len; 4037 if (rc > 0 || rc == -ENOSPC) 4038 rc = 0; 4039 else if (rc) 4040 goto err_out; 4041 4042 d_info.wptr = d_info.rptr; 4043 d_info.out_buf_len = buffer_sz; 4044 rc = process_query_dir_entries(&query_dir_private); 4045 if (rc) 4046 goto err_out; 4047 4048 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4049 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4050 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4051 } else { 4052 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4053 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4054 } 4055 rsp->StructureSize = cpu_to_le16(9); 4056 rsp->OutputBufferOffset = cpu_to_le16(0); 4057 rsp->OutputBufferLength = cpu_to_le32(0); 4058 rsp->Buffer[0] = 0; 4059 inc_rfc1001_len(work->response_buf, 9); 4060 } else { 4061 no_buf_len: 4062 ((struct file_directory_info *) 4063 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4064 ->NextEntryOffset = 0; 4065 if (d_info.data_count >= d_info.last_entry_off_align) 4066 d_info.data_count -= d_info.last_entry_off_align; 4067 4068 rsp->StructureSize = cpu_to_le16(9); 4069 rsp->OutputBufferOffset = cpu_to_le16(72); 4070 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4071 inc_rfc1001_len(work->response_buf, 8 + d_info.data_count); 4072 } 4073 4074 kfree(srch_ptr); 4075 ksmbd_fd_put(work, dir_fp); 4076 ksmbd_revert_fsids(work); 4077 return 0; 4078 4079 err_out: 4080 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4081 kfree(srch_ptr); 4082 4083 err_out2: 4084 if (rc == -EINVAL) 4085 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4086 else if (rc == -EACCES) 4087 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4088 else if (rc == -ENOENT) 4089 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4090 else if (rc == -EBADF) 4091 rsp->hdr.Status = STATUS_FILE_CLOSED; 4092 else if (rc == -ENOMEM) 4093 rsp->hdr.Status = STATUS_NO_MEMORY; 4094 else if (rc == -EFAULT) 4095 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4096 else if (rc == -EIO) 4097 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4098 if (!rsp->hdr.Status) 4099 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4100 4101 smb2_set_err_rsp(work); 4102 ksmbd_fd_put(work, dir_fp); 4103 ksmbd_revert_fsids(work); 4104 return 0; 4105 } 4106 4107 /** 4108 * buffer_check_err() - helper function to check buffer errors 4109 * @reqOutputBufferLength: max buffer length expected in command response 4110 * @rsp: query info response buffer contains output buffer length 4111 * @rsp_org: base response buffer pointer in case of chained response 4112 * @infoclass_size: query info class response buffer size 4113 * 4114 * Return: 0 on success, otherwise error 4115 */ 4116 static int buffer_check_err(int reqOutputBufferLength, 4117 struct smb2_query_info_rsp *rsp, 4118 void *rsp_org, int infoclass_size) 4119 { 4120 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4121 if (reqOutputBufferLength < infoclass_size) { 4122 pr_err("Invalid Buffer Size Requested\n"); 4123 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4124 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4125 return -EINVAL; 4126 } 4127 4128 ksmbd_debug(SMB, "Buffer Overflow\n"); 4129 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 4130 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) + 4131 reqOutputBufferLength); 4132 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength); 4133 } 4134 return 0; 4135 } 4136 4137 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4138 void *rsp_org) 4139 { 4140 struct smb2_file_standard_info *sinfo; 4141 4142 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4143 4144 sinfo->AllocationSize = cpu_to_le64(4096); 4145 sinfo->EndOfFile = cpu_to_le64(0); 4146 sinfo->NumberOfLinks = cpu_to_le32(1); 4147 sinfo->DeletePending = 1; 4148 sinfo->Directory = 0; 4149 rsp->OutputBufferLength = 4150 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4151 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info)); 4152 } 4153 4154 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4155 void *rsp_org) 4156 { 4157 struct smb2_file_internal_info *file_info; 4158 4159 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4160 4161 /* any unique number */ 4162 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4163 rsp->OutputBufferLength = 4164 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4165 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info)); 4166 } 4167 4168 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4169 struct smb2_query_info_req *req, 4170 struct smb2_query_info_rsp *rsp, 4171 void *rsp_org) 4172 { 4173 u64 id; 4174 int rc; 4175 4176 /* 4177 * Windows can sometime send query file info request on 4178 * pipe without opening it, checking error condition here 4179 */ 4180 id = req->VolatileFileId; 4181 if (!ksmbd_session_rpc_method(sess, id)) 4182 return -ENOENT; 4183 4184 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4185 req->FileInfoClass, req->VolatileFileId); 4186 4187 switch (req->FileInfoClass) { 4188 case FILE_STANDARD_INFORMATION: 4189 get_standard_info_pipe(rsp, rsp_org); 4190 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4191 rsp, rsp_org, 4192 FILE_STANDARD_INFORMATION_SIZE); 4193 break; 4194 case FILE_INTERNAL_INFORMATION: 4195 get_internal_info_pipe(rsp, id, rsp_org); 4196 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4197 rsp, rsp_org, 4198 FILE_INTERNAL_INFORMATION_SIZE); 4199 break; 4200 default: 4201 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4202 req->FileInfoClass); 4203 rc = -EOPNOTSUPP; 4204 } 4205 return rc; 4206 } 4207 4208 /** 4209 * smb2_get_ea() - handler for smb2 get extended attribute command 4210 * @work: smb work containing query info command buffer 4211 * @fp: ksmbd_file pointer 4212 * @req: get extended attribute request 4213 * @rsp: response buffer pointer 4214 * @rsp_org: base response buffer pointer in case of chained response 4215 * 4216 * Return: 0 on success, otherwise error 4217 */ 4218 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4219 struct smb2_query_info_req *req, 4220 struct smb2_query_info_rsp *rsp, void *rsp_org) 4221 { 4222 struct smb2_ea_info *eainfo, *prev_eainfo; 4223 char *name, *ptr, *xattr_list = NULL, *buf; 4224 int rc, name_len, value_len, xattr_list_len, idx; 4225 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4226 struct smb2_ea_info_req *ea_req = NULL; 4227 const struct path *path; 4228 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4229 4230 if (!(fp->daccess & FILE_READ_EA_LE)) { 4231 pr_err("Not permitted to read ext attr : 0x%x\n", 4232 fp->daccess); 4233 return -EACCES; 4234 } 4235 4236 path = &fp->filp->f_path; 4237 /* single EA entry is requested with given user.* name */ 4238 if (req->InputBufferLength) { 4239 if (le32_to_cpu(req->InputBufferLength) < 4240 sizeof(struct smb2_ea_info_req)) 4241 return -EINVAL; 4242 4243 ea_req = (struct smb2_ea_info_req *)req->Buffer; 4244 } else { 4245 /* need to send all EAs, if no specific EA is requested*/ 4246 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4247 ksmbd_debug(SMB, 4248 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4249 le32_to_cpu(req->Flags)); 4250 } 4251 4252 buf_free_len = 4253 smb2_calc_max_out_buf_len(work, 8, 4254 le32_to_cpu(req->OutputBufferLength)); 4255 if (buf_free_len < 0) 4256 return -EINVAL; 4257 4258 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4259 if (rc < 0) { 4260 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4261 goto out; 4262 } else if (!rc) { /* there is no EA in the file */ 4263 ksmbd_debug(SMB, "no ea data in the file\n"); 4264 goto done; 4265 } 4266 xattr_list_len = rc; 4267 4268 ptr = (char *)rsp->Buffer; 4269 eainfo = (struct smb2_ea_info *)ptr; 4270 prev_eainfo = eainfo; 4271 idx = 0; 4272 4273 while (idx < xattr_list_len) { 4274 name = xattr_list + idx; 4275 name_len = strlen(name); 4276 4277 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4278 idx += name_len + 1; 4279 4280 /* 4281 * CIFS does not support EA other than user.* namespace, 4282 * still keep the framework generic, to list other attrs 4283 * in future. 4284 */ 4285 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4286 continue; 4287 4288 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4289 STREAM_PREFIX_LEN)) 4290 continue; 4291 4292 if (req->InputBufferLength && 4293 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4294 ea_req->EaNameLength)) 4295 continue; 4296 4297 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4298 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4299 continue; 4300 4301 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4302 name_len -= XATTR_USER_PREFIX_LEN; 4303 4304 ptr = (char *)(&eainfo->name + name_len + 1); 4305 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4306 name_len + 1); 4307 /* bailout if xattr can't fit in buf_free_len */ 4308 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4309 name, &buf); 4310 if (value_len <= 0) { 4311 rc = -ENOENT; 4312 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4313 goto out; 4314 } 4315 4316 buf_free_len -= value_len; 4317 if (buf_free_len < 0) { 4318 kfree(buf); 4319 break; 4320 } 4321 4322 memcpy(ptr, buf, value_len); 4323 kfree(buf); 4324 4325 ptr += value_len; 4326 eainfo->Flags = 0; 4327 eainfo->EaNameLength = name_len; 4328 4329 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4330 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4331 name_len); 4332 else 4333 memcpy(eainfo->name, name, name_len); 4334 4335 eainfo->name[name_len] = '\0'; 4336 eainfo->EaValueLength = cpu_to_le16(value_len); 4337 next_offset = offsetof(struct smb2_ea_info, name) + 4338 name_len + 1 + value_len; 4339 4340 /* align next xattr entry at 4 byte bundary */ 4341 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4342 if (alignment_bytes) { 4343 memset(ptr, '\0', alignment_bytes); 4344 ptr += alignment_bytes; 4345 next_offset += alignment_bytes; 4346 buf_free_len -= alignment_bytes; 4347 } 4348 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4349 prev_eainfo = eainfo; 4350 eainfo = (struct smb2_ea_info *)ptr; 4351 rsp_data_cnt += next_offset; 4352 4353 if (req->InputBufferLength) { 4354 ksmbd_debug(SMB, "single entry requested\n"); 4355 break; 4356 } 4357 } 4358 4359 /* no more ea entries */ 4360 prev_eainfo->NextEntryOffset = 0; 4361 done: 4362 rc = 0; 4363 if (rsp_data_cnt == 0) 4364 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4365 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4366 inc_rfc1001_len(rsp_org, rsp_data_cnt); 4367 out: 4368 kvfree(xattr_list); 4369 return rc; 4370 } 4371 4372 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4373 struct ksmbd_file *fp, void *rsp_org) 4374 { 4375 struct smb2_file_access_info *file_info; 4376 4377 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4378 file_info->AccessFlags = fp->daccess; 4379 rsp->OutputBufferLength = 4380 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4381 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info)); 4382 } 4383 4384 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4385 struct ksmbd_file *fp, void *rsp_org) 4386 { 4387 struct smb2_file_basic_info *basic_info; 4388 struct kstat stat; 4389 u64 time; 4390 4391 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4392 pr_err("no right to read the attributes : 0x%x\n", 4393 fp->daccess); 4394 return -EACCES; 4395 } 4396 4397 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4398 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4399 &stat); 4400 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4401 time = ksmbd_UnixTimeToNT(stat.atime); 4402 basic_info->LastAccessTime = cpu_to_le64(time); 4403 time = ksmbd_UnixTimeToNT(stat.mtime); 4404 basic_info->LastWriteTime = cpu_to_le64(time); 4405 time = ksmbd_UnixTimeToNT(stat.ctime); 4406 basic_info->ChangeTime = cpu_to_le64(time); 4407 basic_info->Attributes = fp->f_ci->m_fattr; 4408 basic_info->Pad1 = 0; 4409 rsp->OutputBufferLength = 4410 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4411 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info)); 4412 return 0; 4413 } 4414 4415 static void get_file_standard_info(struct smb2_query_info_rsp *rsp, 4416 struct ksmbd_file *fp, void *rsp_org) 4417 { 4418 struct smb2_file_standard_info *sinfo; 4419 unsigned int delete_pending; 4420 struct inode *inode; 4421 struct kstat stat; 4422 4423 inode = file_inode(fp->filp); 4424 generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); 4425 4426 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4427 delete_pending = ksmbd_inode_pending_delete(fp); 4428 4429 sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4430 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4431 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4432 sinfo->DeletePending = delete_pending; 4433 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4434 rsp->OutputBufferLength = 4435 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4436 inc_rfc1001_len(rsp_org, 4437 sizeof(struct smb2_file_standard_info)); 4438 } 4439 4440 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4441 void *rsp_org) 4442 { 4443 struct smb2_file_alignment_info *file_info; 4444 4445 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4446 file_info->AlignmentRequirement = 0; 4447 rsp->OutputBufferLength = 4448 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4449 inc_rfc1001_len(rsp_org, 4450 sizeof(struct smb2_file_alignment_info)); 4451 } 4452 4453 static int get_file_all_info(struct ksmbd_work *work, 4454 struct smb2_query_info_rsp *rsp, 4455 struct ksmbd_file *fp, 4456 void *rsp_org) 4457 { 4458 struct ksmbd_conn *conn = work->conn; 4459 struct smb2_file_all_info *file_info; 4460 unsigned int delete_pending; 4461 struct inode *inode; 4462 struct kstat stat; 4463 int conv_len; 4464 char *filename; 4465 u64 time; 4466 4467 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4468 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4469 fp->daccess); 4470 return -EACCES; 4471 } 4472 4473 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4474 if (IS_ERR(filename)) 4475 return PTR_ERR(filename); 4476 4477 inode = file_inode(fp->filp); 4478 generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); 4479 4480 ksmbd_debug(SMB, "filename = %s\n", filename); 4481 delete_pending = ksmbd_inode_pending_delete(fp); 4482 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4483 4484 file_info->CreationTime = cpu_to_le64(fp->create_time); 4485 time = ksmbd_UnixTimeToNT(stat.atime); 4486 file_info->LastAccessTime = cpu_to_le64(time); 4487 time = ksmbd_UnixTimeToNT(stat.mtime); 4488 file_info->LastWriteTime = cpu_to_le64(time); 4489 time = ksmbd_UnixTimeToNT(stat.ctime); 4490 file_info->ChangeTime = cpu_to_le64(time); 4491 file_info->Attributes = fp->f_ci->m_fattr; 4492 file_info->Pad1 = 0; 4493 file_info->AllocationSize = 4494 cpu_to_le64(inode->i_blocks << 9); 4495 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4496 file_info->NumberOfLinks = 4497 cpu_to_le32(get_nlink(&stat) - delete_pending); 4498 file_info->DeletePending = delete_pending; 4499 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4500 file_info->Pad2 = 0; 4501 file_info->IndexNumber = cpu_to_le64(stat.ino); 4502 file_info->EASize = 0; 4503 file_info->AccessFlags = fp->daccess; 4504 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4505 file_info->Mode = fp->coption; 4506 file_info->AlignmentRequirement = 0; 4507 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4508 PATH_MAX, conn->local_nls, 0); 4509 conv_len *= 2; 4510 file_info->FileNameLength = cpu_to_le32(conv_len); 4511 rsp->OutputBufferLength = 4512 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4513 kfree(filename); 4514 inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength)); 4515 return 0; 4516 } 4517 4518 static void get_file_alternate_info(struct ksmbd_work *work, 4519 struct smb2_query_info_rsp *rsp, 4520 struct ksmbd_file *fp, 4521 void *rsp_org) 4522 { 4523 struct ksmbd_conn *conn = work->conn; 4524 struct smb2_file_alt_name_info *file_info; 4525 struct dentry *dentry = fp->filp->f_path.dentry; 4526 int conv_len; 4527 4528 spin_lock(&dentry->d_lock); 4529 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 4530 conv_len = ksmbd_extract_shortname(conn, 4531 dentry->d_name.name, 4532 file_info->FileName); 4533 spin_unlock(&dentry->d_lock); 4534 file_info->FileNameLength = cpu_to_le32(conv_len); 4535 rsp->OutputBufferLength = 4536 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); 4537 inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength)); 4538 } 4539 4540 static void get_file_stream_info(struct ksmbd_work *work, 4541 struct smb2_query_info_rsp *rsp, 4542 struct ksmbd_file *fp, 4543 void *rsp_org) 4544 { 4545 struct ksmbd_conn *conn = work->conn; 4546 struct smb2_file_stream_info *file_info; 4547 char *stream_name, *xattr_list = NULL, *stream_buf; 4548 struct kstat stat; 4549 const struct path *path = &fp->filp->f_path; 4550 ssize_t xattr_list_len; 4551 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 4552 int buf_free_len; 4553 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4554 4555 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4556 &stat); 4557 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 4558 4559 buf_free_len = 4560 smb2_calc_max_out_buf_len(work, 8, 4561 le32_to_cpu(req->OutputBufferLength)); 4562 if (buf_free_len < 0) 4563 goto out; 4564 4565 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4566 if (xattr_list_len < 0) { 4567 goto out; 4568 } else if (!xattr_list_len) { 4569 ksmbd_debug(SMB, "empty xattr in the file\n"); 4570 goto out; 4571 } 4572 4573 while (idx < xattr_list_len) { 4574 stream_name = xattr_list + idx; 4575 streamlen = strlen(stream_name); 4576 idx += streamlen + 1; 4577 4578 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 4579 4580 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 4581 STREAM_PREFIX, STREAM_PREFIX_LEN)) 4582 continue; 4583 4584 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 4585 STREAM_PREFIX_LEN); 4586 streamlen = stream_name_len; 4587 4588 /* plus : size */ 4589 streamlen += 1; 4590 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); 4591 if (!stream_buf) 4592 break; 4593 4594 streamlen = snprintf(stream_buf, streamlen + 1, 4595 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 4596 4597 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 4598 if (next > buf_free_len) { 4599 kfree(stream_buf); 4600 break; 4601 } 4602 4603 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 4604 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4605 stream_buf, streamlen, 4606 conn->local_nls, 0); 4607 streamlen *= 2; 4608 kfree(stream_buf); 4609 file_info->StreamNameLength = cpu_to_le32(streamlen); 4610 file_info->StreamSize = cpu_to_le64(stream_name_len); 4611 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 4612 4613 nbytes += next; 4614 buf_free_len -= next; 4615 file_info->NextEntryOffset = cpu_to_le32(next); 4616 } 4617 4618 out: 4619 if (!S_ISDIR(stat.mode) && 4620 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 4621 file_info = (struct smb2_file_stream_info *) 4622 &rsp->Buffer[nbytes]; 4623 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4624 "::$DATA", 7, conn->local_nls, 0); 4625 streamlen *= 2; 4626 file_info->StreamNameLength = cpu_to_le32(streamlen); 4627 file_info->StreamSize = cpu_to_le64(stat.size); 4628 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 4629 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 4630 } 4631 4632 /* last entry offset should be 0 */ 4633 file_info->NextEntryOffset = 0; 4634 kvfree(xattr_list); 4635 4636 rsp->OutputBufferLength = cpu_to_le32(nbytes); 4637 inc_rfc1001_len(rsp_org, nbytes); 4638 } 4639 4640 static void get_file_internal_info(struct smb2_query_info_rsp *rsp, 4641 struct ksmbd_file *fp, void *rsp_org) 4642 { 4643 struct smb2_file_internal_info *file_info; 4644 struct kstat stat; 4645 4646 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4647 &stat); 4648 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4649 file_info->IndexNumber = cpu_to_le64(stat.ino); 4650 rsp->OutputBufferLength = 4651 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4652 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info)); 4653 } 4654 4655 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 4656 struct ksmbd_file *fp, void *rsp_org) 4657 { 4658 struct smb2_file_ntwrk_info *file_info; 4659 struct inode *inode; 4660 struct kstat stat; 4661 u64 time; 4662 4663 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4664 pr_err("no right to read the attributes : 0x%x\n", 4665 fp->daccess); 4666 return -EACCES; 4667 } 4668 4669 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; 4670 4671 inode = file_inode(fp->filp); 4672 generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); 4673 4674 file_info->CreationTime = cpu_to_le64(fp->create_time); 4675 time = ksmbd_UnixTimeToNT(stat.atime); 4676 file_info->LastAccessTime = cpu_to_le64(time); 4677 time = ksmbd_UnixTimeToNT(stat.mtime); 4678 file_info->LastWriteTime = cpu_to_le64(time); 4679 time = ksmbd_UnixTimeToNT(stat.ctime); 4680 file_info->ChangeTime = cpu_to_le64(time); 4681 file_info->Attributes = fp->f_ci->m_fattr; 4682 file_info->AllocationSize = 4683 cpu_to_le64(inode->i_blocks << 9); 4684 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4685 file_info->Reserved = cpu_to_le32(0); 4686 rsp->OutputBufferLength = 4687 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); 4688 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info)); 4689 return 0; 4690 } 4691 4692 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 4693 { 4694 struct smb2_file_ea_info *file_info; 4695 4696 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 4697 file_info->EASize = 0; 4698 rsp->OutputBufferLength = 4699 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 4700 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info)); 4701 } 4702 4703 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 4704 struct ksmbd_file *fp, void *rsp_org) 4705 { 4706 struct smb2_file_pos_info *file_info; 4707 4708 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 4709 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4710 rsp->OutputBufferLength = 4711 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 4712 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info)); 4713 } 4714 4715 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 4716 struct ksmbd_file *fp, void *rsp_org) 4717 { 4718 struct smb2_file_mode_info *file_info; 4719 4720 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 4721 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 4722 rsp->OutputBufferLength = 4723 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 4724 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info)); 4725 } 4726 4727 static void get_file_compression_info(struct smb2_query_info_rsp *rsp, 4728 struct ksmbd_file *fp, void *rsp_org) 4729 { 4730 struct smb2_file_comp_info *file_info; 4731 struct kstat stat; 4732 4733 generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), 4734 &stat); 4735 4736 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 4737 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 4738 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 4739 file_info->CompressionUnitShift = 0; 4740 file_info->ChunkShift = 0; 4741 file_info->ClusterShift = 0; 4742 memset(&file_info->Reserved[0], 0, 3); 4743 4744 rsp->OutputBufferLength = 4745 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 4746 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info)); 4747 } 4748 4749 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 4750 struct ksmbd_file *fp, void *rsp_org) 4751 { 4752 struct smb2_file_attr_tag_info *file_info; 4753 4754 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4755 pr_err("no right to read the attributes : 0x%x\n", 4756 fp->daccess); 4757 return -EACCES; 4758 } 4759 4760 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 4761 file_info->FileAttributes = fp->f_ci->m_fattr; 4762 file_info->ReparseTag = 0; 4763 rsp->OutputBufferLength = 4764 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 4765 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info)); 4766 return 0; 4767 } 4768 4769 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 4770 struct ksmbd_file *fp, void *rsp_org) 4771 { 4772 struct smb311_posix_qinfo *file_info; 4773 struct inode *inode = file_inode(fp->filp); 4774 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4775 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 4776 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 4777 u64 time; 4778 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 4779 4780 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 4781 file_info->CreationTime = cpu_to_le64(fp->create_time); 4782 time = ksmbd_UnixTimeToNT(inode->i_atime); 4783 file_info->LastAccessTime = cpu_to_le64(time); 4784 time = ksmbd_UnixTimeToNT(inode->i_mtime); 4785 file_info->LastWriteTime = cpu_to_le64(time); 4786 time = ksmbd_UnixTimeToNT(inode->i_ctime); 4787 file_info->ChangeTime = cpu_to_le64(time); 4788 file_info->DosAttributes = fp->f_ci->m_fattr; 4789 file_info->Inode = cpu_to_le64(inode->i_ino); 4790 file_info->EndOfFile = cpu_to_le64(inode->i_size); 4791 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4792 file_info->HardLinks = cpu_to_le32(inode->i_nlink); 4793 file_info->Mode = cpu_to_le32(inode->i_mode & 0777); 4794 file_info->DeviceId = cpu_to_le32(inode->i_rdev); 4795 4796 /* 4797 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4798 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4799 * sub_auth(4 * 1(num_subauth)) + RID(4). 4800 */ 4801 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 4802 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 4803 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 4804 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 4805 4806 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 4807 inc_rfc1001_len(rsp_org, out_buf_len); 4808 return out_buf_len; 4809 } 4810 4811 static int smb2_get_info_file(struct ksmbd_work *work, 4812 struct smb2_query_info_req *req, 4813 struct smb2_query_info_rsp *rsp) 4814 { 4815 struct ksmbd_file *fp; 4816 int fileinfoclass = 0; 4817 int rc = 0; 4818 int file_infoclass_size; 4819 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 4820 4821 if (test_share_config_flag(work->tcon->share_conf, 4822 KSMBD_SHARE_FLAG_PIPE)) { 4823 /* smb2 info file called for pipe */ 4824 return smb2_get_info_file_pipe(work->sess, req, rsp, 4825 work->response_buf); 4826 } 4827 4828 if (work->next_smb2_rcv_hdr_off) { 4829 if (!has_file_id(req->VolatileFileId)) { 4830 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 4831 work->compound_fid); 4832 id = work->compound_fid; 4833 pid = work->compound_pfid; 4834 } 4835 } 4836 4837 if (!has_file_id(id)) { 4838 id = req->VolatileFileId; 4839 pid = req->PersistentFileId; 4840 } 4841 4842 fp = ksmbd_lookup_fd_slow(work, id, pid); 4843 if (!fp) 4844 return -ENOENT; 4845 4846 fileinfoclass = req->FileInfoClass; 4847 4848 switch (fileinfoclass) { 4849 case FILE_ACCESS_INFORMATION: 4850 get_file_access_info(rsp, fp, work->response_buf); 4851 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE; 4852 break; 4853 4854 case FILE_BASIC_INFORMATION: 4855 rc = get_file_basic_info(rsp, fp, work->response_buf); 4856 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE; 4857 break; 4858 4859 case FILE_STANDARD_INFORMATION: 4860 get_file_standard_info(rsp, fp, work->response_buf); 4861 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE; 4862 break; 4863 4864 case FILE_ALIGNMENT_INFORMATION: 4865 get_file_alignment_info(rsp, work->response_buf); 4866 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE; 4867 break; 4868 4869 case FILE_ALL_INFORMATION: 4870 rc = get_file_all_info(work, rsp, fp, work->response_buf); 4871 file_infoclass_size = FILE_ALL_INFORMATION_SIZE; 4872 break; 4873 4874 case FILE_ALTERNATE_NAME_INFORMATION: 4875 get_file_alternate_info(work, rsp, fp, work->response_buf); 4876 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE; 4877 break; 4878 4879 case FILE_STREAM_INFORMATION: 4880 get_file_stream_info(work, rsp, fp, work->response_buf); 4881 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE; 4882 break; 4883 4884 case FILE_INTERNAL_INFORMATION: 4885 get_file_internal_info(rsp, fp, work->response_buf); 4886 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE; 4887 break; 4888 4889 case FILE_NETWORK_OPEN_INFORMATION: 4890 rc = get_file_network_open_info(rsp, fp, work->response_buf); 4891 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE; 4892 break; 4893 4894 case FILE_EA_INFORMATION: 4895 get_file_ea_info(rsp, work->response_buf); 4896 file_infoclass_size = FILE_EA_INFORMATION_SIZE; 4897 break; 4898 4899 case FILE_FULL_EA_INFORMATION: 4900 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 4901 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE; 4902 break; 4903 4904 case FILE_POSITION_INFORMATION: 4905 get_file_position_info(rsp, fp, work->response_buf); 4906 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE; 4907 break; 4908 4909 case FILE_MODE_INFORMATION: 4910 get_file_mode_info(rsp, fp, work->response_buf); 4911 file_infoclass_size = FILE_MODE_INFORMATION_SIZE; 4912 break; 4913 4914 case FILE_COMPRESSION_INFORMATION: 4915 get_file_compression_info(rsp, fp, work->response_buf); 4916 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE; 4917 break; 4918 4919 case FILE_ATTRIBUTE_TAG_INFORMATION: 4920 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 4921 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE; 4922 break; 4923 case SMB_FIND_FILE_POSIX_INFO: 4924 if (!work->tcon->posix_extensions) { 4925 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 4926 rc = -EOPNOTSUPP; 4927 } else { 4928 file_infoclass_size = find_file_posix_info(rsp, fp, 4929 work->response_buf); 4930 } 4931 break; 4932 default: 4933 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 4934 fileinfoclass); 4935 rc = -EOPNOTSUPP; 4936 } 4937 if (!rc) 4938 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4939 rsp, work->response_buf, 4940 file_infoclass_size); 4941 ksmbd_fd_put(work, fp); 4942 return rc; 4943 } 4944 4945 static int smb2_get_info_filesystem(struct ksmbd_work *work, 4946 struct smb2_query_info_req *req, 4947 struct smb2_query_info_rsp *rsp) 4948 { 4949 struct ksmbd_session *sess = work->sess; 4950 struct ksmbd_conn *conn = work->conn; 4951 struct ksmbd_share_config *share = work->tcon->share_conf; 4952 int fsinfoclass = 0; 4953 struct kstatfs stfs; 4954 struct path path; 4955 int rc = 0, len; 4956 int fs_infoclass_size = 0; 4957 4958 if (!share->path) 4959 return -EIO; 4960 4961 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 4962 if (rc) { 4963 pr_err("cannot create vfs path\n"); 4964 return -EIO; 4965 } 4966 4967 rc = vfs_statfs(&path, &stfs); 4968 if (rc) { 4969 pr_err("cannot do stat of path %s\n", share->path); 4970 path_put(&path); 4971 return -EIO; 4972 } 4973 4974 fsinfoclass = req->FileInfoClass; 4975 4976 switch (fsinfoclass) { 4977 case FS_DEVICE_INFORMATION: 4978 { 4979 struct filesystem_device_info *info; 4980 4981 info = (struct filesystem_device_info *)rsp->Buffer; 4982 4983 info->DeviceType = cpu_to_le32(stfs.f_type); 4984 info->DeviceCharacteristics = cpu_to_le32(0x00000020); 4985 rsp->OutputBufferLength = cpu_to_le32(8); 4986 inc_rfc1001_len(work->response_buf, 8); 4987 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE; 4988 break; 4989 } 4990 case FS_ATTRIBUTE_INFORMATION: 4991 { 4992 struct filesystem_attribute_info *info; 4993 size_t sz; 4994 4995 info = (struct filesystem_attribute_info *)rsp->Buffer; 4996 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 4997 FILE_PERSISTENT_ACLS | 4998 FILE_UNICODE_ON_DISK | 4999 FILE_CASE_PRESERVED_NAMES | 5000 FILE_CASE_SENSITIVE_SEARCH | 5001 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5002 5003 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5004 5005 if (test_share_config_flag(work->tcon->share_conf, 5006 KSMBD_SHARE_FLAG_STREAMS)) 5007 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5008 5009 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5010 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5011 "NTFS", PATH_MAX, conn->local_nls, 0); 5012 len = len * 2; 5013 info->FileSystemNameLen = cpu_to_le32(len); 5014 sz = sizeof(struct filesystem_attribute_info) - 2 + len; 5015 rsp->OutputBufferLength = cpu_to_le32(sz); 5016 inc_rfc1001_len(work->response_buf, sz); 5017 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE; 5018 break; 5019 } 5020 case FS_VOLUME_INFORMATION: 5021 { 5022 struct filesystem_vol_info *info; 5023 size_t sz; 5024 unsigned int serial_crc = 0; 5025 5026 info = (struct filesystem_vol_info *)(rsp->Buffer); 5027 info->VolumeCreationTime = 0; 5028 serial_crc = crc32_le(serial_crc, share->name, 5029 strlen(share->name)); 5030 serial_crc = crc32_le(serial_crc, share->path, 5031 strlen(share->path)); 5032 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5033 strlen(ksmbd_netbios_name())); 5034 /* Taking dummy value of serial number*/ 5035 info->SerialNumber = cpu_to_le32(serial_crc); 5036 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5037 share->name, PATH_MAX, 5038 conn->local_nls, 0); 5039 len = len * 2; 5040 info->VolumeLabelSize = cpu_to_le32(len); 5041 info->Reserved = 0; 5042 sz = sizeof(struct filesystem_vol_info) - 2 + len; 5043 rsp->OutputBufferLength = cpu_to_le32(sz); 5044 inc_rfc1001_len(work->response_buf, sz); 5045 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE; 5046 break; 5047 } 5048 case FS_SIZE_INFORMATION: 5049 { 5050 struct filesystem_info *info; 5051 5052 info = (struct filesystem_info *)(rsp->Buffer); 5053 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5054 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); 5055 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5056 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5057 rsp->OutputBufferLength = cpu_to_le32(24); 5058 inc_rfc1001_len(work->response_buf, 24); 5059 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE; 5060 break; 5061 } 5062 case FS_FULL_SIZE_INFORMATION: 5063 { 5064 struct smb2_fs_full_size_info *info; 5065 5066 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5067 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5068 info->CallerAvailableAllocationUnits = 5069 cpu_to_le64(stfs.f_bavail); 5070 info->ActualAvailableAllocationUnits = 5071 cpu_to_le64(stfs.f_bfree); 5072 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5073 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5074 rsp->OutputBufferLength = cpu_to_le32(32); 5075 inc_rfc1001_len(work->response_buf, 32); 5076 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE; 5077 break; 5078 } 5079 case FS_OBJECT_ID_INFORMATION: 5080 { 5081 struct object_id_info *info; 5082 5083 info = (struct object_id_info *)(rsp->Buffer); 5084 5085 if (!user_guest(sess->user)) 5086 memcpy(info->objid, user_passkey(sess->user), 16); 5087 else 5088 memset(info->objid, 0, 16); 5089 5090 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5091 info->extended_info.version = cpu_to_le32(1); 5092 info->extended_info.release = cpu_to_le32(1); 5093 info->extended_info.rel_date = 0; 5094 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5095 rsp->OutputBufferLength = cpu_to_le32(64); 5096 inc_rfc1001_len(work->response_buf, 64); 5097 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE; 5098 break; 5099 } 5100 case FS_SECTOR_SIZE_INFORMATION: 5101 { 5102 struct smb3_fs_ss_info *info; 5103 unsigned int sector_size = 5104 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5105 5106 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5107 5108 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5109 info->PhysicalBytesPerSectorForAtomicity = 5110 cpu_to_le32(sector_size); 5111 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5112 info->FSEffPhysicalBytesPerSectorForAtomicity = 5113 cpu_to_le32(sector_size); 5114 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5115 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5116 info->ByteOffsetForSectorAlignment = 0; 5117 info->ByteOffsetForPartitionAlignment = 0; 5118 rsp->OutputBufferLength = cpu_to_le32(28); 5119 inc_rfc1001_len(work->response_buf, 28); 5120 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE; 5121 break; 5122 } 5123 case FS_CONTROL_INFORMATION: 5124 { 5125 /* 5126 * TODO : The current implementation is based on 5127 * test result with win7(NTFS) server. It's need to 5128 * modify this to get valid Quota values 5129 * from Linux kernel 5130 */ 5131 struct smb2_fs_control_info *info; 5132 5133 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5134 info->FreeSpaceStartFiltering = 0; 5135 info->FreeSpaceThreshold = 0; 5136 info->FreeSpaceStopFiltering = 0; 5137 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5138 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5139 info->Padding = 0; 5140 rsp->OutputBufferLength = cpu_to_le32(48); 5141 inc_rfc1001_len(work->response_buf, 48); 5142 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE; 5143 break; 5144 } 5145 case FS_POSIX_INFORMATION: 5146 { 5147 struct filesystem_posix_info *info; 5148 5149 if (!work->tcon->posix_extensions) { 5150 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5151 rc = -EOPNOTSUPP; 5152 } else { 5153 info = (struct filesystem_posix_info *)(rsp->Buffer); 5154 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5155 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5156 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5157 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5158 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5159 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5160 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5161 rsp->OutputBufferLength = cpu_to_le32(56); 5162 inc_rfc1001_len(work->response_buf, 56); 5163 fs_infoclass_size = FS_POSIX_INFORMATION_SIZE; 5164 } 5165 break; 5166 } 5167 default: 5168 path_put(&path); 5169 return -EOPNOTSUPP; 5170 } 5171 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5172 rsp, work->response_buf, 5173 fs_infoclass_size); 5174 path_put(&path); 5175 return rc; 5176 } 5177 5178 static int smb2_get_info_sec(struct ksmbd_work *work, 5179 struct smb2_query_info_req *req, 5180 struct smb2_query_info_rsp *rsp) 5181 { 5182 struct ksmbd_file *fp; 5183 struct mnt_idmap *idmap; 5184 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5185 struct smb_fattr fattr = {{0}}; 5186 struct inode *inode; 5187 __u32 secdesclen = 0; 5188 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5189 int addition_info = le32_to_cpu(req->AdditionalInformation); 5190 int rc = 0, ppntsd_size = 0; 5191 5192 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5193 PROTECTED_DACL_SECINFO | 5194 UNPROTECTED_DACL_SECINFO)) { 5195 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5196 addition_info); 5197 5198 pntsd->revision = cpu_to_le16(1); 5199 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5200 pntsd->osidoffset = 0; 5201 pntsd->gsidoffset = 0; 5202 pntsd->sacloffset = 0; 5203 pntsd->dacloffset = 0; 5204 5205 secdesclen = sizeof(struct smb_ntsd); 5206 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5207 inc_rfc1001_len(work->response_buf, secdesclen); 5208 5209 return 0; 5210 } 5211 5212 if (work->next_smb2_rcv_hdr_off) { 5213 if (!has_file_id(req->VolatileFileId)) { 5214 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5215 work->compound_fid); 5216 id = work->compound_fid; 5217 pid = work->compound_pfid; 5218 } 5219 } 5220 5221 if (!has_file_id(id)) { 5222 id = req->VolatileFileId; 5223 pid = req->PersistentFileId; 5224 } 5225 5226 fp = ksmbd_lookup_fd_slow(work, id, pid); 5227 if (!fp) 5228 return -ENOENT; 5229 5230 idmap = file_mnt_idmap(fp->filp); 5231 inode = file_inode(fp->filp); 5232 ksmbd_acls_fattr(&fattr, idmap, inode); 5233 5234 if (test_share_config_flag(work->tcon->share_conf, 5235 KSMBD_SHARE_FLAG_ACL_XATTR)) 5236 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5237 fp->filp->f_path.dentry, 5238 &ppntsd); 5239 5240 /* Check if sd buffer size exceeds response buffer size */ 5241 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5242 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5243 addition_info, &secdesclen, &fattr); 5244 posix_acl_release(fattr.cf_acls); 5245 posix_acl_release(fattr.cf_dacls); 5246 kfree(ppntsd); 5247 ksmbd_fd_put(work, fp); 5248 if (rc) 5249 return rc; 5250 5251 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5252 inc_rfc1001_len(work->response_buf, secdesclen); 5253 return 0; 5254 } 5255 5256 /** 5257 * smb2_query_info() - handler for smb2 query info command 5258 * @work: smb work containing query info request buffer 5259 * 5260 * Return: 0 on success, otherwise error 5261 */ 5262 int smb2_query_info(struct ksmbd_work *work) 5263 { 5264 struct smb2_query_info_req *req; 5265 struct smb2_query_info_rsp *rsp; 5266 int rc = 0; 5267 5268 WORK_BUFFERS(work, req, rsp); 5269 5270 ksmbd_debug(SMB, "GOT query info request\n"); 5271 5272 switch (req->InfoType) { 5273 case SMB2_O_INFO_FILE: 5274 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5275 rc = smb2_get_info_file(work, req, rsp); 5276 break; 5277 case SMB2_O_INFO_FILESYSTEM: 5278 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5279 rc = smb2_get_info_filesystem(work, req, rsp); 5280 break; 5281 case SMB2_O_INFO_SECURITY: 5282 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5283 rc = smb2_get_info_sec(work, req, rsp); 5284 break; 5285 default: 5286 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5287 req->InfoType); 5288 rc = -EOPNOTSUPP; 5289 } 5290 5291 if (rc < 0) { 5292 if (rc == -EACCES) 5293 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5294 else if (rc == -ENOENT) 5295 rsp->hdr.Status = STATUS_FILE_CLOSED; 5296 else if (rc == -EIO) 5297 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5298 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5299 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5300 smb2_set_err_rsp(work); 5301 5302 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5303 rc); 5304 return rc; 5305 } 5306 rsp->StructureSize = cpu_to_le16(9); 5307 rsp->OutputBufferOffset = cpu_to_le16(72); 5308 inc_rfc1001_len(work->response_buf, 8); 5309 return 0; 5310 } 5311 5312 /** 5313 * smb2_close_pipe() - handler for closing IPC pipe 5314 * @work: smb work containing close request buffer 5315 * 5316 * Return: 0 5317 */ 5318 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5319 { 5320 u64 id; 5321 struct smb2_close_req *req; 5322 struct smb2_close_rsp *rsp; 5323 5324 WORK_BUFFERS(work, req, rsp); 5325 5326 id = req->VolatileFileId; 5327 ksmbd_session_rpc_close(work->sess, id); 5328 5329 rsp->StructureSize = cpu_to_le16(60); 5330 rsp->Flags = 0; 5331 rsp->Reserved = 0; 5332 rsp->CreationTime = 0; 5333 rsp->LastAccessTime = 0; 5334 rsp->LastWriteTime = 0; 5335 rsp->ChangeTime = 0; 5336 rsp->AllocationSize = 0; 5337 rsp->EndOfFile = 0; 5338 rsp->Attributes = 0; 5339 inc_rfc1001_len(work->response_buf, 60); 5340 return 0; 5341 } 5342 5343 /** 5344 * smb2_close() - handler for smb2 close file command 5345 * @work: smb work containing close request buffer 5346 * 5347 * Return: 0 5348 */ 5349 int smb2_close(struct ksmbd_work *work) 5350 { 5351 u64 volatile_id = KSMBD_NO_FID; 5352 u64 sess_id; 5353 struct smb2_close_req *req; 5354 struct smb2_close_rsp *rsp; 5355 struct ksmbd_conn *conn = work->conn; 5356 struct ksmbd_file *fp; 5357 struct inode *inode; 5358 u64 time; 5359 int err = 0; 5360 5361 WORK_BUFFERS(work, req, rsp); 5362 5363 if (test_share_config_flag(work->tcon->share_conf, 5364 KSMBD_SHARE_FLAG_PIPE)) { 5365 ksmbd_debug(SMB, "IPC pipe close request\n"); 5366 return smb2_close_pipe(work); 5367 } 5368 5369 sess_id = le64_to_cpu(req->hdr.SessionId); 5370 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5371 sess_id = work->compound_sid; 5372 5373 work->compound_sid = 0; 5374 if (check_session_id(conn, sess_id)) { 5375 work->compound_sid = sess_id; 5376 } else { 5377 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5378 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5379 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5380 err = -EBADF; 5381 goto out; 5382 } 5383 5384 if (work->next_smb2_rcv_hdr_off && 5385 !has_file_id(req->VolatileFileId)) { 5386 if (!has_file_id(work->compound_fid)) { 5387 /* file already closed, return FILE_CLOSED */ 5388 ksmbd_debug(SMB, "file already closed\n"); 5389 rsp->hdr.Status = STATUS_FILE_CLOSED; 5390 err = -EBADF; 5391 goto out; 5392 } else { 5393 ksmbd_debug(SMB, 5394 "Compound request set FID = %llu:%llu\n", 5395 work->compound_fid, 5396 work->compound_pfid); 5397 volatile_id = work->compound_fid; 5398 5399 /* file closed, stored id is not valid anymore */ 5400 work->compound_fid = KSMBD_NO_FID; 5401 work->compound_pfid = KSMBD_NO_FID; 5402 } 5403 } else { 5404 volatile_id = req->VolatileFileId; 5405 } 5406 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5407 5408 rsp->StructureSize = cpu_to_le16(60); 5409 rsp->Reserved = 0; 5410 5411 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5412 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5413 if (!fp) { 5414 err = -ENOENT; 5415 goto out; 5416 } 5417 5418 inode = file_inode(fp->filp); 5419 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5420 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 : 5421 cpu_to_le64(inode->i_blocks << 9); 5422 rsp->EndOfFile = cpu_to_le64(inode->i_size); 5423 rsp->Attributes = fp->f_ci->m_fattr; 5424 rsp->CreationTime = cpu_to_le64(fp->create_time); 5425 time = ksmbd_UnixTimeToNT(inode->i_atime); 5426 rsp->LastAccessTime = cpu_to_le64(time); 5427 time = ksmbd_UnixTimeToNT(inode->i_mtime); 5428 rsp->LastWriteTime = cpu_to_le64(time); 5429 time = ksmbd_UnixTimeToNT(inode->i_ctime); 5430 rsp->ChangeTime = cpu_to_le64(time); 5431 ksmbd_fd_put(work, fp); 5432 } else { 5433 rsp->Flags = 0; 5434 rsp->AllocationSize = 0; 5435 rsp->EndOfFile = 0; 5436 rsp->Attributes = 0; 5437 rsp->CreationTime = 0; 5438 rsp->LastAccessTime = 0; 5439 rsp->LastWriteTime = 0; 5440 rsp->ChangeTime = 0; 5441 } 5442 5443 err = ksmbd_close_fd(work, volatile_id); 5444 out: 5445 if (err) { 5446 if (rsp->hdr.Status == 0) 5447 rsp->hdr.Status = STATUS_FILE_CLOSED; 5448 smb2_set_err_rsp(work); 5449 } else { 5450 inc_rfc1001_len(work->response_buf, 60); 5451 } 5452 5453 return 0; 5454 } 5455 5456 /** 5457 * smb2_echo() - handler for smb2 echo(ping) command 5458 * @work: smb work containing echo request buffer 5459 * 5460 * Return: 0 5461 */ 5462 int smb2_echo(struct ksmbd_work *work) 5463 { 5464 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); 5465 5466 if (work->next_smb2_rcv_hdr_off) 5467 rsp = ksmbd_resp_buf_next(work); 5468 5469 rsp->StructureSize = cpu_to_le16(4); 5470 rsp->Reserved = 0; 5471 inc_rfc1001_len(work->response_buf, 4); 5472 return 0; 5473 } 5474 5475 static int smb2_rename(struct ksmbd_work *work, 5476 struct ksmbd_file *fp, 5477 struct smb2_file_rename_info *file_info, 5478 struct nls_table *local_nls) 5479 { 5480 struct ksmbd_share_config *share = fp->tcon->share_conf; 5481 char *new_name = NULL; 5482 int rc, flags = 0; 5483 5484 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 5485 new_name = smb2_get_name(file_info->FileName, 5486 le32_to_cpu(file_info->FileNameLength), 5487 local_nls); 5488 if (IS_ERR(new_name)) 5489 return PTR_ERR(new_name); 5490 5491 if (strchr(new_name, ':')) { 5492 int s_type; 5493 char *xattr_stream_name, *stream_name = NULL; 5494 size_t xattr_stream_size; 5495 int len; 5496 5497 rc = parse_stream_name(new_name, &stream_name, &s_type); 5498 if (rc < 0) 5499 goto out; 5500 5501 len = strlen(new_name); 5502 if (len > 0 && new_name[len - 1] != '/') { 5503 pr_err("not allow base filename in rename\n"); 5504 rc = -ESHARE; 5505 goto out; 5506 } 5507 5508 rc = ksmbd_vfs_xattr_stream_name(stream_name, 5509 &xattr_stream_name, 5510 &xattr_stream_size, 5511 s_type); 5512 if (rc) 5513 goto out; 5514 5515 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 5516 &fp->filp->f_path, 5517 xattr_stream_name, 5518 NULL, 0, 0); 5519 if (rc < 0) { 5520 pr_err("failed to store stream name in xattr: %d\n", 5521 rc); 5522 rc = -EINVAL; 5523 goto out; 5524 } 5525 5526 goto out; 5527 } 5528 5529 ksmbd_debug(SMB, "new name %s\n", new_name); 5530 if (ksmbd_share_veto_filename(share, new_name)) { 5531 rc = -ENOENT; 5532 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 5533 goto out; 5534 } 5535 5536 if (!file_info->ReplaceIfExists) 5537 flags = RENAME_NOREPLACE; 5538 5539 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 5540 out: 5541 kfree(new_name); 5542 return rc; 5543 } 5544 5545 static int smb2_create_link(struct ksmbd_work *work, 5546 struct ksmbd_share_config *share, 5547 struct smb2_file_link_info *file_info, 5548 unsigned int buf_len, struct file *filp, 5549 struct nls_table *local_nls) 5550 { 5551 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 5552 struct path path, parent_path; 5553 bool file_present = false; 5554 int rc; 5555 5556 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 5557 le32_to_cpu(file_info->FileNameLength)) 5558 return -EINVAL; 5559 5560 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 5561 pathname = kmalloc(PATH_MAX, GFP_KERNEL); 5562 if (!pathname) 5563 return -ENOMEM; 5564 5565 link_name = smb2_get_name(file_info->FileName, 5566 le32_to_cpu(file_info->FileNameLength), 5567 local_nls); 5568 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 5569 rc = -EINVAL; 5570 goto out; 5571 } 5572 5573 ksmbd_debug(SMB, "link name is %s\n", link_name); 5574 target_name = file_path(filp, pathname, PATH_MAX); 5575 if (IS_ERR(target_name)) { 5576 rc = -EINVAL; 5577 goto out; 5578 } 5579 5580 ksmbd_debug(SMB, "target name is %s\n", target_name); 5581 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, 5582 &parent_path, &path, 0); 5583 if (rc) { 5584 if (rc != -ENOENT) 5585 goto out; 5586 } else 5587 file_present = true; 5588 5589 if (file_info->ReplaceIfExists) { 5590 if (file_present) { 5591 rc = ksmbd_vfs_remove_file(work, &path); 5592 if (rc) { 5593 rc = -EINVAL; 5594 ksmbd_debug(SMB, "cannot delete %s\n", 5595 link_name); 5596 goto out; 5597 } 5598 } 5599 } else { 5600 if (file_present) { 5601 rc = -EEXIST; 5602 ksmbd_debug(SMB, "link already exists\n"); 5603 goto out; 5604 } 5605 } 5606 5607 rc = ksmbd_vfs_link(work, target_name, link_name); 5608 if (rc) 5609 rc = -EINVAL; 5610 out: 5611 if (file_present) { 5612 inode_unlock(d_inode(parent_path.dentry)); 5613 path_put(&path); 5614 path_put(&parent_path); 5615 } 5616 if (!IS_ERR(link_name)) 5617 kfree(link_name); 5618 kfree(pathname); 5619 return rc; 5620 } 5621 5622 static int set_file_basic_info(struct ksmbd_file *fp, 5623 struct smb2_file_basic_info *file_info, 5624 struct ksmbd_share_config *share) 5625 { 5626 struct iattr attrs; 5627 struct file *filp; 5628 struct inode *inode; 5629 struct mnt_idmap *idmap; 5630 int rc = 0; 5631 5632 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 5633 return -EACCES; 5634 5635 attrs.ia_valid = 0; 5636 filp = fp->filp; 5637 inode = file_inode(filp); 5638 idmap = file_mnt_idmap(filp); 5639 5640 if (file_info->CreationTime) 5641 fp->create_time = le64_to_cpu(file_info->CreationTime); 5642 5643 if (file_info->LastAccessTime) { 5644 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 5645 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 5646 } 5647 5648 attrs.ia_valid |= ATTR_CTIME; 5649 if (file_info->ChangeTime) 5650 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); 5651 else 5652 attrs.ia_ctime = inode->i_ctime; 5653 5654 if (file_info->LastWriteTime) { 5655 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 5656 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 5657 } 5658 5659 if (file_info->Attributes) { 5660 if (!S_ISDIR(inode->i_mode) && 5661 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 5662 pr_err("can't change a file to a directory\n"); 5663 return -EINVAL; 5664 } 5665 5666 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 5667 fp->f_ci->m_fattr = file_info->Attributes | 5668 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 5669 } 5670 5671 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 5672 (file_info->CreationTime || file_info->Attributes)) { 5673 struct xattr_dos_attrib da = {0}; 5674 5675 da.version = 4; 5676 da.itime = fp->itime; 5677 da.create_time = fp->create_time; 5678 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 5679 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 5680 XATTR_DOSINFO_ITIME; 5681 5682 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da); 5683 if (rc) 5684 ksmbd_debug(SMB, 5685 "failed to restore file attribute in EA\n"); 5686 rc = 0; 5687 } 5688 5689 if (attrs.ia_valid) { 5690 struct dentry *dentry = filp->f_path.dentry; 5691 struct inode *inode = d_inode(dentry); 5692 5693 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 5694 return -EACCES; 5695 5696 inode_lock(inode); 5697 inode->i_ctime = attrs.ia_ctime; 5698 attrs.ia_valid &= ~ATTR_CTIME; 5699 rc = notify_change(idmap, dentry, &attrs, NULL); 5700 inode_unlock(inode); 5701 } 5702 return rc; 5703 } 5704 5705 static int set_file_allocation_info(struct ksmbd_work *work, 5706 struct ksmbd_file *fp, 5707 struct smb2_file_alloc_info *file_alloc_info) 5708 { 5709 /* 5710 * TODO : It's working fine only when store dos attributes 5711 * is not yes. need to implement a logic which works 5712 * properly with any smb.conf option 5713 */ 5714 5715 loff_t alloc_blks; 5716 struct inode *inode; 5717 int rc; 5718 5719 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5720 return -EACCES; 5721 5722 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 5723 inode = file_inode(fp->filp); 5724 5725 if (alloc_blks > inode->i_blocks) { 5726 smb_break_all_levII_oplock(work, fp, 1); 5727 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 5728 alloc_blks * 512); 5729 if (rc && rc != -EOPNOTSUPP) { 5730 pr_err("vfs_fallocate is failed : %d\n", rc); 5731 return rc; 5732 } 5733 } else if (alloc_blks < inode->i_blocks) { 5734 loff_t size; 5735 5736 /* 5737 * Allocation size could be smaller than original one 5738 * which means allocated blocks in file should be 5739 * deallocated. use truncate to cut out it, but inode 5740 * size is also updated with truncate offset. 5741 * inode size is retained by backup inode size. 5742 */ 5743 size = i_size_read(inode); 5744 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 5745 if (rc) { 5746 pr_err("truncate failed!, err %d\n", rc); 5747 return rc; 5748 } 5749 if (size < alloc_blks * 512) 5750 i_size_write(inode, size); 5751 } 5752 return 0; 5753 } 5754 5755 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5756 struct smb2_file_eof_info *file_eof_info) 5757 { 5758 loff_t newsize; 5759 struct inode *inode; 5760 int rc; 5761 5762 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5763 return -EACCES; 5764 5765 newsize = le64_to_cpu(file_eof_info->EndOfFile); 5766 inode = file_inode(fp->filp); 5767 5768 /* 5769 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 5770 * on FAT32 shared device, truncate execution time is too long 5771 * and network error could cause from windows client. because 5772 * truncate of some filesystem like FAT32 fill zero data in 5773 * truncated range. 5774 */ 5775 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { 5776 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 5777 rc = ksmbd_vfs_truncate(work, fp, newsize); 5778 if (rc) { 5779 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 5780 if (rc != -EAGAIN) 5781 rc = -EBADF; 5782 return rc; 5783 } 5784 } 5785 return 0; 5786 } 5787 5788 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5789 struct smb2_file_rename_info *rename_info, 5790 unsigned int buf_len) 5791 { 5792 if (!(fp->daccess & FILE_DELETE_LE)) { 5793 pr_err("no right to delete : 0x%x\n", fp->daccess); 5794 return -EACCES; 5795 } 5796 5797 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 5798 le32_to_cpu(rename_info->FileNameLength)) 5799 return -EINVAL; 5800 5801 if (!le32_to_cpu(rename_info->FileNameLength)) 5802 return -EINVAL; 5803 5804 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 5805 } 5806 5807 static int set_file_disposition_info(struct ksmbd_file *fp, 5808 struct smb2_file_disposition_info *file_info) 5809 { 5810 struct inode *inode; 5811 5812 if (!(fp->daccess & FILE_DELETE_LE)) { 5813 pr_err("no right to delete : 0x%x\n", fp->daccess); 5814 return -EACCES; 5815 } 5816 5817 inode = file_inode(fp->filp); 5818 if (file_info->DeletePending) { 5819 if (S_ISDIR(inode->i_mode) && 5820 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 5821 return -EBUSY; 5822 ksmbd_set_inode_pending_delete(fp); 5823 } else { 5824 ksmbd_clear_inode_pending_delete(fp); 5825 } 5826 return 0; 5827 } 5828 5829 static int set_file_position_info(struct ksmbd_file *fp, 5830 struct smb2_file_pos_info *file_info) 5831 { 5832 loff_t current_byte_offset; 5833 unsigned long sector_size; 5834 struct inode *inode; 5835 5836 inode = file_inode(fp->filp); 5837 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 5838 sector_size = inode->i_sb->s_blocksize; 5839 5840 if (current_byte_offset < 0 || 5841 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 5842 current_byte_offset & (sector_size - 1))) { 5843 pr_err("CurrentByteOffset is not valid : %llu\n", 5844 current_byte_offset); 5845 return -EINVAL; 5846 } 5847 5848 fp->filp->f_pos = current_byte_offset; 5849 return 0; 5850 } 5851 5852 static int set_file_mode_info(struct ksmbd_file *fp, 5853 struct smb2_file_mode_info *file_info) 5854 { 5855 __le32 mode; 5856 5857 mode = file_info->Mode; 5858 5859 if ((mode & ~FILE_MODE_INFO_MASK)) { 5860 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 5861 return -EINVAL; 5862 } 5863 5864 /* 5865 * TODO : need to implement consideration for 5866 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 5867 */ 5868 ksmbd_vfs_set_fadvise(fp->filp, mode); 5869 fp->coption = mode; 5870 return 0; 5871 } 5872 5873 /** 5874 * smb2_set_info_file() - handler for smb2 set info command 5875 * @work: smb work containing set info command buffer 5876 * @fp: ksmbd_file pointer 5877 * @req: request buffer pointer 5878 * @share: ksmbd_share_config pointer 5879 * 5880 * Return: 0 on success, otherwise error 5881 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH 5882 */ 5883 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 5884 struct smb2_set_info_req *req, 5885 struct ksmbd_share_config *share) 5886 { 5887 unsigned int buf_len = le32_to_cpu(req->BufferLength); 5888 5889 switch (req->FileInfoClass) { 5890 case FILE_BASIC_INFORMATION: 5891 { 5892 if (buf_len < sizeof(struct smb2_file_basic_info)) 5893 return -EINVAL; 5894 5895 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share); 5896 } 5897 case FILE_ALLOCATION_INFORMATION: 5898 { 5899 if (buf_len < sizeof(struct smb2_file_alloc_info)) 5900 return -EINVAL; 5901 5902 return set_file_allocation_info(work, fp, 5903 (struct smb2_file_alloc_info *)req->Buffer); 5904 } 5905 case FILE_END_OF_FILE_INFORMATION: 5906 { 5907 if (buf_len < sizeof(struct smb2_file_eof_info)) 5908 return -EINVAL; 5909 5910 return set_end_of_file_info(work, fp, 5911 (struct smb2_file_eof_info *)req->Buffer); 5912 } 5913 case FILE_RENAME_INFORMATION: 5914 { 5915 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 5916 ksmbd_debug(SMB, 5917 "User does not have write permission\n"); 5918 return -EACCES; 5919 } 5920 5921 if (buf_len < sizeof(struct smb2_file_rename_info)) 5922 return -EINVAL; 5923 5924 return set_rename_info(work, fp, 5925 (struct smb2_file_rename_info *)req->Buffer, 5926 buf_len); 5927 } 5928 case FILE_LINK_INFORMATION: 5929 { 5930 if (buf_len < sizeof(struct smb2_file_link_info)) 5931 return -EINVAL; 5932 5933 return smb2_create_link(work, work->tcon->share_conf, 5934 (struct smb2_file_link_info *)req->Buffer, 5935 buf_len, fp->filp, 5936 work->conn->local_nls); 5937 } 5938 case FILE_DISPOSITION_INFORMATION: 5939 { 5940 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 5941 ksmbd_debug(SMB, 5942 "User does not have write permission\n"); 5943 return -EACCES; 5944 } 5945 5946 if (buf_len < sizeof(struct smb2_file_disposition_info)) 5947 return -EINVAL; 5948 5949 return set_file_disposition_info(fp, 5950 (struct smb2_file_disposition_info *)req->Buffer); 5951 } 5952 case FILE_FULL_EA_INFORMATION: 5953 { 5954 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 5955 pr_err("Not permitted to write ext attr: 0x%x\n", 5956 fp->daccess); 5957 return -EACCES; 5958 } 5959 5960 if (buf_len < sizeof(struct smb2_ea_info)) 5961 return -EINVAL; 5962 5963 return smb2_set_ea((struct smb2_ea_info *)req->Buffer, 5964 buf_len, &fp->filp->f_path); 5965 } 5966 case FILE_POSITION_INFORMATION: 5967 { 5968 if (buf_len < sizeof(struct smb2_file_pos_info)) 5969 return -EINVAL; 5970 5971 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer); 5972 } 5973 case FILE_MODE_INFORMATION: 5974 { 5975 if (buf_len < sizeof(struct smb2_file_mode_info)) 5976 return -EINVAL; 5977 5978 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer); 5979 } 5980 } 5981 5982 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 5983 return -EOPNOTSUPP; 5984 } 5985 5986 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 5987 char *buffer, int buf_len) 5988 { 5989 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 5990 5991 fp->saccess |= FILE_SHARE_DELETE_LE; 5992 5993 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 5994 buf_len, false); 5995 } 5996 5997 /** 5998 * smb2_set_info() - handler for smb2 set info command handler 5999 * @work: smb work containing set info request buffer 6000 * 6001 * Return: 0 on success, otherwise error 6002 */ 6003 int smb2_set_info(struct ksmbd_work *work) 6004 { 6005 struct smb2_set_info_req *req; 6006 struct smb2_set_info_rsp *rsp; 6007 struct ksmbd_file *fp; 6008 int rc = 0; 6009 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6010 6011 ksmbd_debug(SMB, "Received set info request\n"); 6012 6013 if (work->next_smb2_rcv_hdr_off) { 6014 req = ksmbd_req_buf_next(work); 6015 rsp = ksmbd_resp_buf_next(work); 6016 if (!has_file_id(req->VolatileFileId)) { 6017 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6018 work->compound_fid); 6019 id = work->compound_fid; 6020 pid = work->compound_pfid; 6021 } 6022 } else { 6023 req = smb2_get_msg(work->request_buf); 6024 rsp = smb2_get_msg(work->response_buf); 6025 } 6026 6027 if (!has_file_id(id)) { 6028 id = req->VolatileFileId; 6029 pid = req->PersistentFileId; 6030 } 6031 6032 fp = ksmbd_lookup_fd_slow(work, id, pid); 6033 if (!fp) { 6034 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6035 rc = -ENOENT; 6036 goto err_out; 6037 } 6038 6039 switch (req->InfoType) { 6040 case SMB2_O_INFO_FILE: 6041 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6042 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6043 break; 6044 case SMB2_O_INFO_SECURITY: 6045 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6046 if (ksmbd_override_fsids(work)) { 6047 rc = -ENOMEM; 6048 goto err_out; 6049 } 6050 rc = smb2_set_info_sec(fp, 6051 le32_to_cpu(req->AdditionalInformation), 6052 req->Buffer, 6053 le32_to_cpu(req->BufferLength)); 6054 ksmbd_revert_fsids(work); 6055 break; 6056 default: 6057 rc = -EOPNOTSUPP; 6058 } 6059 6060 if (rc < 0) 6061 goto err_out; 6062 6063 rsp->StructureSize = cpu_to_le16(2); 6064 inc_rfc1001_len(work->response_buf, 2); 6065 ksmbd_fd_put(work, fp); 6066 return 0; 6067 6068 err_out: 6069 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6070 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6071 else if (rc == -EINVAL) 6072 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6073 else if (rc == -ESHARE) 6074 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6075 else if (rc == -ENOENT) 6076 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6077 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6078 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6079 else if (rc == -EAGAIN) 6080 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6081 else if (rc == -EBADF || rc == -ESTALE) 6082 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6083 else if (rc == -EEXIST) 6084 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6085 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6086 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6087 smb2_set_err_rsp(work); 6088 ksmbd_fd_put(work, fp); 6089 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6090 return rc; 6091 } 6092 6093 /** 6094 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6095 * @work: smb work containing read IPC pipe command buffer 6096 * 6097 * Return: 0 on success, otherwise error 6098 */ 6099 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6100 { 6101 int nbytes = 0, err; 6102 u64 id; 6103 struct ksmbd_rpc_command *rpc_resp; 6104 struct smb2_read_req *req; 6105 struct smb2_read_rsp *rsp; 6106 6107 WORK_BUFFERS(work, req, rsp); 6108 6109 id = req->VolatileFileId; 6110 6111 inc_rfc1001_len(work->response_buf, 16); 6112 rpc_resp = ksmbd_rpc_read(work->sess, id); 6113 if (rpc_resp) { 6114 if (rpc_resp->flags != KSMBD_RPC_OK) { 6115 err = -EINVAL; 6116 goto out; 6117 } 6118 6119 work->aux_payload_buf = 6120 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL); 6121 if (!work->aux_payload_buf) { 6122 err = -ENOMEM; 6123 goto out; 6124 } 6125 6126 memcpy(work->aux_payload_buf, rpc_resp->payload, 6127 rpc_resp->payload_sz); 6128 6129 nbytes = rpc_resp->payload_sz; 6130 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4; 6131 work->aux_payload_sz = nbytes; 6132 kvfree(rpc_resp); 6133 } 6134 6135 rsp->StructureSize = cpu_to_le16(17); 6136 rsp->DataOffset = 80; 6137 rsp->Reserved = 0; 6138 rsp->DataLength = cpu_to_le32(nbytes); 6139 rsp->DataRemaining = 0; 6140 rsp->Flags = 0; 6141 inc_rfc1001_len(work->response_buf, nbytes); 6142 return 0; 6143 6144 out: 6145 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6146 smb2_set_err_rsp(work); 6147 kvfree(rpc_resp); 6148 return err; 6149 } 6150 6151 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6152 struct smb2_buffer_desc_v1 *desc, 6153 __le32 Channel, 6154 __le16 ChannelInfoLength) 6155 { 6156 unsigned int i, ch_count; 6157 6158 if (work->conn->dialect == SMB30_PROT_ID && 6159 Channel != SMB2_CHANNEL_RDMA_V1) 6160 return -EINVAL; 6161 6162 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6163 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6164 for (i = 0; i < ch_count; i++) { 6165 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6166 i, 6167 le32_to_cpu(desc[i].token), 6168 le32_to_cpu(desc[i].length)); 6169 } 6170 } 6171 if (!ch_count) 6172 return -EINVAL; 6173 6174 work->need_invalidate_rkey = 6175 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6176 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6177 work->remote_key = le32_to_cpu(desc->token); 6178 return 0; 6179 } 6180 6181 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6182 struct smb2_read_req *req, void *data_buf, 6183 size_t length) 6184 { 6185 int err; 6186 6187 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6188 (struct smb2_buffer_desc_v1 *) 6189 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6190 le16_to_cpu(req->ReadChannelInfoLength)); 6191 if (err) 6192 return err; 6193 6194 return length; 6195 } 6196 6197 /** 6198 * smb2_read() - handler for smb2 read from file 6199 * @work: smb work containing read command buffer 6200 * 6201 * Return: 0 on success, otherwise error 6202 */ 6203 int smb2_read(struct ksmbd_work *work) 6204 { 6205 struct ksmbd_conn *conn = work->conn; 6206 struct smb2_read_req *req; 6207 struct smb2_read_rsp *rsp; 6208 struct ksmbd_file *fp = NULL; 6209 loff_t offset; 6210 size_t length, mincount; 6211 ssize_t nbytes = 0, remain_bytes = 0; 6212 int err = 0; 6213 bool is_rdma_channel = false; 6214 unsigned int max_read_size = conn->vals->max_read_size; 6215 6216 WORK_BUFFERS(work, req, rsp); 6217 if (work->next_smb2_rcv_hdr_off) { 6218 work->send_no_response = 1; 6219 err = -EOPNOTSUPP; 6220 goto out; 6221 } 6222 6223 if (test_share_config_flag(work->tcon->share_conf, 6224 KSMBD_SHARE_FLAG_PIPE)) { 6225 ksmbd_debug(SMB, "IPC pipe read request\n"); 6226 return smb2_read_pipe(work); 6227 } 6228 6229 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6230 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6231 is_rdma_channel = true; 6232 max_read_size = get_smbd_max_read_write_size(); 6233 } 6234 6235 if (is_rdma_channel == true) { 6236 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6237 6238 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6239 err = -EINVAL; 6240 goto out; 6241 } 6242 err = smb2_set_remote_key_for_rdma(work, 6243 (struct smb2_buffer_desc_v1 *) 6244 ((char *)req + ch_offset), 6245 req->Channel, 6246 req->ReadChannelInfoLength); 6247 if (err) 6248 goto out; 6249 } 6250 6251 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6252 if (!fp) { 6253 err = -ENOENT; 6254 goto out; 6255 } 6256 6257 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6258 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6259 err = -EACCES; 6260 goto out; 6261 } 6262 6263 offset = le64_to_cpu(req->Offset); 6264 length = le32_to_cpu(req->Length); 6265 mincount = le32_to_cpu(req->MinimumCount); 6266 6267 if (length > max_read_size) { 6268 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6269 max_read_size); 6270 err = -EINVAL; 6271 goto out; 6272 } 6273 6274 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6275 fp->filp, offset, length); 6276 6277 work->aux_payload_buf = kvzalloc(length, GFP_KERNEL); 6278 if (!work->aux_payload_buf) { 6279 err = -ENOMEM; 6280 goto out; 6281 } 6282 6283 nbytes = ksmbd_vfs_read(work, fp, length, &offset); 6284 if (nbytes < 0) { 6285 err = nbytes; 6286 goto out; 6287 } 6288 6289 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6290 kvfree(work->aux_payload_buf); 6291 work->aux_payload_buf = NULL; 6292 rsp->hdr.Status = STATUS_END_OF_FILE; 6293 smb2_set_err_rsp(work); 6294 ksmbd_fd_put(work, fp); 6295 return 0; 6296 } 6297 6298 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6299 nbytes, offset, mincount); 6300 6301 if (is_rdma_channel == true) { 6302 /* write data to the client using rdma channel */ 6303 remain_bytes = smb2_read_rdma_channel(work, req, 6304 work->aux_payload_buf, 6305 nbytes); 6306 kvfree(work->aux_payload_buf); 6307 work->aux_payload_buf = NULL; 6308 6309 nbytes = 0; 6310 if (remain_bytes < 0) { 6311 err = (int)remain_bytes; 6312 goto out; 6313 } 6314 } 6315 6316 rsp->StructureSize = cpu_to_le16(17); 6317 rsp->DataOffset = 80; 6318 rsp->Reserved = 0; 6319 rsp->DataLength = cpu_to_le32(nbytes); 6320 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6321 rsp->Flags = 0; 6322 inc_rfc1001_len(work->response_buf, 16); 6323 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4; 6324 work->aux_payload_sz = nbytes; 6325 inc_rfc1001_len(work->response_buf, nbytes); 6326 ksmbd_fd_put(work, fp); 6327 return 0; 6328 6329 out: 6330 if (err) { 6331 if (err == -EISDIR) 6332 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6333 else if (err == -EAGAIN) 6334 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6335 else if (err == -ENOENT) 6336 rsp->hdr.Status = STATUS_FILE_CLOSED; 6337 else if (err == -EACCES) 6338 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6339 else if (err == -ESHARE) 6340 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6341 else if (err == -EINVAL) 6342 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6343 else 6344 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6345 6346 smb2_set_err_rsp(work); 6347 } 6348 ksmbd_fd_put(work, fp); 6349 return err; 6350 } 6351 6352 /** 6353 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6354 * @work: smb work containing write IPC pipe command buffer 6355 * 6356 * Return: 0 on success, otherwise error 6357 */ 6358 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6359 { 6360 struct smb2_write_req *req; 6361 struct smb2_write_rsp *rsp; 6362 struct ksmbd_rpc_command *rpc_resp; 6363 u64 id = 0; 6364 int err = 0, ret = 0; 6365 char *data_buf; 6366 size_t length; 6367 6368 WORK_BUFFERS(work, req, rsp); 6369 6370 length = le32_to_cpu(req->Length); 6371 id = req->VolatileFileId; 6372 6373 if ((u64)le16_to_cpu(req->DataOffset) + length > 6374 get_rfc1002_len(work->request_buf)) { 6375 pr_err("invalid write data offset %u, smb_len %u\n", 6376 le16_to_cpu(req->DataOffset), 6377 get_rfc1002_len(work->request_buf)); 6378 err = -EINVAL; 6379 goto out; 6380 } 6381 6382 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6383 le16_to_cpu(req->DataOffset)); 6384 6385 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6386 if (rpc_resp) { 6387 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6388 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6389 kvfree(rpc_resp); 6390 smb2_set_err_rsp(work); 6391 return -EOPNOTSUPP; 6392 } 6393 if (rpc_resp->flags != KSMBD_RPC_OK) { 6394 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6395 smb2_set_err_rsp(work); 6396 kvfree(rpc_resp); 6397 return ret; 6398 } 6399 kvfree(rpc_resp); 6400 } 6401 6402 rsp->StructureSize = cpu_to_le16(17); 6403 rsp->DataOffset = 0; 6404 rsp->Reserved = 0; 6405 rsp->DataLength = cpu_to_le32(length); 6406 rsp->DataRemaining = 0; 6407 rsp->Reserved2 = 0; 6408 inc_rfc1001_len(work->response_buf, 16); 6409 return 0; 6410 out: 6411 if (err) { 6412 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6413 smb2_set_err_rsp(work); 6414 } 6415 6416 return err; 6417 } 6418 6419 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6420 struct smb2_write_req *req, 6421 struct ksmbd_file *fp, 6422 loff_t offset, size_t length, bool sync) 6423 { 6424 char *data_buf; 6425 int ret; 6426 ssize_t nbytes; 6427 6428 data_buf = kvzalloc(length, GFP_KERNEL); 6429 if (!data_buf) 6430 return -ENOMEM; 6431 6432 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6433 (struct smb2_buffer_desc_v1 *) 6434 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6435 le16_to_cpu(req->WriteChannelInfoLength)); 6436 if (ret < 0) { 6437 kvfree(data_buf); 6438 return ret; 6439 } 6440 6441 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 6442 kvfree(data_buf); 6443 if (ret < 0) 6444 return ret; 6445 6446 return nbytes; 6447 } 6448 6449 /** 6450 * smb2_write() - handler for smb2 write from file 6451 * @work: smb work containing write command buffer 6452 * 6453 * Return: 0 on success, otherwise error 6454 */ 6455 int smb2_write(struct ksmbd_work *work) 6456 { 6457 struct smb2_write_req *req; 6458 struct smb2_write_rsp *rsp; 6459 struct ksmbd_file *fp = NULL; 6460 loff_t offset; 6461 size_t length; 6462 ssize_t nbytes; 6463 char *data_buf; 6464 bool writethrough = false, is_rdma_channel = false; 6465 int err = 0; 6466 unsigned int max_write_size = work->conn->vals->max_write_size; 6467 6468 WORK_BUFFERS(work, req, rsp); 6469 6470 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 6471 ksmbd_debug(SMB, "IPC pipe write request\n"); 6472 return smb2_write_pipe(work); 6473 } 6474 6475 offset = le64_to_cpu(req->Offset); 6476 length = le32_to_cpu(req->Length); 6477 6478 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 6479 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 6480 is_rdma_channel = true; 6481 max_write_size = get_smbd_max_read_write_size(); 6482 length = le32_to_cpu(req->RemainingBytes); 6483 } 6484 6485 if (is_rdma_channel == true) { 6486 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 6487 6488 if (req->Length != 0 || req->DataOffset != 0 || 6489 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 6490 err = -EINVAL; 6491 goto out; 6492 } 6493 err = smb2_set_remote_key_for_rdma(work, 6494 (struct smb2_buffer_desc_v1 *) 6495 ((char *)req + ch_offset), 6496 req->Channel, 6497 req->WriteChannelInfoLength); 6498 if (err) 6499 goto out; 6500 } 6501 6502 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6503 ksmbd_debug(SMB, "User does not have write permission\n"); 6504 err = -EACCES; 6505 goto out; 6506 } 6507 6508 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6509 if (!fp) { 6510 err = -ENOENT; 6511 goto out; 6512 } 6513 6514 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6515 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 6516 err = -EACCES; 6517 goto out; 6518 } 6519 6520 if (length > max_write_size) { 6521 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 6522 max_write_size); 6523 err = -EINVAL; 6524 goto out; 6525 } 6526 6527 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 6528 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 6529 writethrough = true; 6530 6531 if (is_rdma_channel == false) { 6532 if (le16_to_cpu(req->DataOffset) < 6533 offsetof(struct smb2_write_req, Buffer)) { 6534 err = -EINVAL; 6535 goto out; 6536 } 6537 6538 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6539 le16_to_cpu(req->DataOffset)); 6540 6541 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6542 fp->filp, offset, length); 6543 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 6544 writethrough, &nbytes); 6545 if (err < 0) 6546 goto out; 6547 } else { 6548 /* read data from the client using rdma channel, and 6549 * write the data. 6550 */ 6551 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 6552 writethrough); 6553 if (nbytes < 0) { 6554 err = (int)nbytes; 6555 goto out; 6556 } 6557 } 6558 6559 rsp->StructureSize = cpu_to_le16(17); 6560 rsp->DataOffset = 0; 6561 rsp->Reserved = 0; 6562 rsp->DataLength = cpu_to_le32(nbytes); 6563 rsp->DataRemaining = 0; 6564 rsp->Reserved2 = 0; 6565 inc_rfc1001_len(work->response_buf, 16); 6566 ksmbd_fd_put(work, fp); 6567 return 0; 6568 6569 out: 6570 if (err == -EAGAIN) 6571 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6572 else if (err == -ENOSPC || err == -EFBIG) 6573 rsp->hdr.Status = STATUS_DISK_FULL; 6574 else if (err == -ENOENT) 6575 rsp->hdr.Status = STATUS_FILE_CLOSED; 6576 else if (err == -EACCES) 6577 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6578 else if (err == -ESHARE) 6579 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6580 else if (err == -EINVAL) 6581 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6582 else 6583 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6584 6585 smb2_set_err_rsp(work); 6586 ksmbd_fd_put(work, fp); 6587 return err; 6588 } 6589 6590 /** 6591 * smb2_flush() - handler for smb2 flush file - fsync 6592 * @work: smb work containing flush command buffer 6593 * 6594 * Return: 0 on success, otherwise error 6595 */ 6596 int smb2_flush(struct ksmbd_work *work) 6597 { 6598 struct smb2_flush_req *req; 6599 struct smb2_flush_rsp *rsp; 6600 int err; 6601 6602 WORK_BUFFERS(work, req, rsp); 6603 6604 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); 6605 6606 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 6607 if (err) 6608 goto out; 6609 6610 rsp->StructureSize = cpu_to_le16(4); 6611 rsp->Reserved = 0; 6612 inc_rfc1001_len(work->response_buf, 4); 6613 return 0; 6614 6615 out: 6616 if (err) { 6617 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6618 smb2_set_err_rsp(work); 6619 } 6620 6621 return err; 6622 } 6623 6624 /** 6625 * smb2_cancel() - handler for smb2 cancel command 6626 * @work: smb work containing cancel command buffer 6627 * 6628 * Return: 0 on success, otherwise error 6629 */ 6630 int smb2_cancel(struct ksmbd_work *work) 6631 { 6632 struct ksmbd_conn *conn = work->conn; 6633 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 6634 struct smb2_hdr *chdr; 6635 struct ksmbd_work *iter; 6636 struct list_head *command_list; 6637 6638 if (work->next_smb2_rcv_hdr_off) 6639 hdr = ksmbd_resp_buf_next(work); 6640 6641 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 6642 hdr->MessageId, hdr->Flags); 6643 6644 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 6645 command_list = &conn->async_requests; 6646 6647 spin_lock(&conn->request_lock); 6648 list_for_each_entry(iter, command_list, 6649 async_request_entry) { 6650 chdr = smb2_get_msg(iter->request_buf); 6651 6652 if (iter->async_id != 6653 le64_to_cpu(hdr->Id.AsyncId)) 6654 continue; 6655 6656 ksmbd_debug(SMB, 6657 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 6658 le64_to_cpu(hdr->Id.AsyncId), 6659 le16_to_cpu(chdr->Command)); 6660 iter->state = KSMBD_WORK_CANCELLED; 6661 if (iter->cancel_fn) 6662 iter->cancel_fn(iter->cancel_argv); 6663 break; 6664 } 6665 spin_unlock(&conn->request_lock); 6666 } else { 6667 command_list = &conn->requests; 6668 6669 spin_lock(&conn->request_lock); 6670 list_for_each_entry(iter, command_list, request_entry) { 6671 chdr = smb2_get_msg(iter->request_buf); 6672 6673 if (chdr->MessageId != hdr->MessageId || 6674 iter == work) 6675 continue; 6676 6677 ksmbd_debug(SMB, 6678 "smb2 with mid %llu cancelled command = 0x%x\n", 6679 le64_to_cpu(hdr->MessageId), 6680 le16_to_cpu(chdr->Command)); 6681 iter->state = KSMBD_WORK_CANCELLED; 6682 break; 6683 } 6684 spin_unlock(&conn->request_lock); 6685 } 6686 6687 /* For SMB2_CANCEL command itself send no response*/ 6688 work->send_no_response = 1; 6689 return 0; 6690 } 6691 6692 struct file_lock *smb_flock_init(struct file *f) 6693 { 6694 struct file_lock *fl; 6695 6696 fl = locks_alloc_lock(); 6697 if (!fl) 6698 goto out; 6699 6700 locks_init_lock(fl); 6701 6702 fl->fl_owner = f; 6703 fl->fl_pid = current->tgid; 6704 fl->fl_file = f; 6705 fl->fl_flags = FL_POSIX; 6706 fl->fl_ops = NULL; 6707 fl->fl_lmops = NULL; 6708 6709 out: 6710 return fl; 6711 } 6712 6713 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 6714 { 6715 int cmd = -EINVAL; 6716 6717 /* Checking for wrong flag combination during lock request*/ 6718 switch (flags) { 6719 case SMB2_LOCKFLAG_SHARED: 6720 ksmbd_debug(SMB, "received shared request\n"); 6721 cmd = F_SETLKW; 6722 flock->fl_type = F_RDLCK; 6723 flock->fl_flags |= FL_SLEEP; 6724 break; 6725 case SMB2_LOCKFLAG_EXCLUSIVE: 6726 ksmbd_debug(SMB, "received exclusive request\n"); 6727 cmd = F_SETLKW; 6728 flock->fl_type = F_WRLCK; 6729 flock->fl_flags |= FL_SLEEP; 6730 break; 6731 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6732 ksmbd_debug(SMB, 6733 "received shared & fail immediately request\n"); 6734 cmd = F_SETLK; 6735 flock->fl_type = F_RDLCK; 6736 break; 6737 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6738 ksmbd_debug(SMB, 6739 "received exclusive & fail immediately request\n"); 6740 cmd = F_SETLK; 6741 flock->fl_type = F_WRLCK; 6742 break; 6743 case SMB2_LOCKFLAG_UNLOCK: 6744 ksmbd_debug(SMB, "received unlock request\n"); 6745 flock->fl_type = F_UNLCK; 6746 cmd = F_SETLK; 6747 break; 6748 } 6749 6750 return cmd; 6751 } 6752 6753 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 6754 unsigned int cmd, int flags, 6755 struct list_head *lock_list) 6756 { 6757 struct ksmbd_lock *lock; 6758 6759 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); 6760 if (!lock) 6761 return NULL; 6762 6763 lock->cmd = cmd; 6764 lock->fl = flock; 6765 lock->start = flock->fl_start; 6766 lock->end = flock->fl_end; 6767 lock->flags = flags; 6768 if (lock->start == lock->end) 6769 lock->zero_len = 1; 6770 INIT_LIST_HEAD(&lock->clist); 6771 INIT_LIST_HEAD(&lock->flist); 6772 INIT_LIST_HEAD(&lock->llist); 6773 list_add_tail(&lock->llist, lock_list); 6774 6775 return lock; 6776 } 6777 6778 static void smb2_remove_blocked_lock(void **argv) 6779 { 6780 struct file_lock *flock = (struct file_lock *)argv[0]; 6781 6782 ksmbd_vfs_posix_lock_unblock(flock); 6783 wake_up(&flock->fl_wait); 6784 } 6785 6786 static inline bool lock_defer_pending(struct file_lock *fl) 6787 { 6788 /* check pending lock waiters */ 6789 return waitqueue_active(&fl->fl_wait); 6790 } 6791 6792 /** 6793 * smb2_lock() - handler for smb2 file lock command 6794 * @work: smb work containing lock command buffer 6795 * 6796 * Return: 0 on success, otherwise error 6797 */ 6798 int smb2_lock(struct ksmbd_work *work) 6799 { 6800 struct smb2_lock_req *req; 6801 struct smb2_lock_rsp *rsp; 6802 struct smb2_lock_element *lock_ele; 6803 struct ksmbd_file *fp = NULL; 6804 struct file_lock *flock = NULL; 6805 struct file *filp = NULL; 6806 int lock_count; 6807 int flags = 0; 6808 int cmd = 0; 6809 int err = -EIO, i, rc = 0; 6810 u64 lock_start, lock_length; 6811 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 6812 struct ksmbd_conn *conn; 6813 int nolock = 0; 6814 LIST_HEAD(lock_list); 6815 LIST_HEAD(rollback_list); 6816 int prior_lock = 0; 6817 6818 WORK_BUFFERS(work, req, rsp); 6819 6820 ksmbd_debug(SMB, "Received lock request\n"); 6821 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6822 if (!fp) { 6823 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 6824 err = -ENOENT; 6825 goto out2; 6826 } 6827 6828 filp = fp->filp; 6829 lock_count = le16_to_cpu(req->LockCount); 6830 lock_ele = req->locks; 6831 6832 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 6833 if (!lock_count) { 6834 err = -EINVAL; 6835 goto out2; 6836 } 6837 6838 for (i = 0; i < lock_count; i++) { 6839 flags = le32_to_cpu(lock_ele[i].Flags); 6840 6841 flock = smb_flock_init(filp); 6842 if (!flock) 6843 goto out; 6844 6845 cmd = smb2_set_flock_flags(flock, flags); 6846 6847 lock_start = le64_to_cpu(lock_ele[i].Offset); 6848 lock_length = le64_to_cpu(lock_ele[i].Length); 6849 if (lock_start > U64_MAX - lock_length) { 6850 pr_err("Invalid lock range requested\n"); 6851 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6852 locks_free_lock(flock); 6853 goto out; 6854 } 6855 6856 if (lock_start > OFFSET_MAX) 6857 flock->fl_start = OFFSET_MAX; 6858 else 6859 flock->fl_start = lock_start; 6860 6861 lock_length = le64_to_cpu(lock_ele[i].Length); 6862 if (lock_length > OFFSET_MAX - flock->fl_start) 6863 lock_length = OFFSET_MAX - flock->fl_start; 6864 6865 flock->fl_end = flock->fl_start + lock_length; 6866 6867 if (flock->fl_end < flock->fl_start) { 6868 ksmbd_debug(SMB, 6869 "the end offset(%llx) is smaller than the start offset(%llx)\n", 6870 flock->fl_end, flock->fl_start); 6871 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6872 locks_free_lock(flock); 6873 goto out; 6874 } 6875 6876 /* Check conflict locks in one request */ 6877 list_for_each_entry(cmp_lock, &lock_list, llist) { 6878 if (cmp_lock->fl->fl_start <= flock->fl_start && 6879 cmp_lock->fl->fl_end >= flock->fl_end) { 6880 if (cmp_lock->fl->fl_type != F_UNLCK && 6881 flock->fl_type != F_UNLCK) { 6882 pr_err("conflict two locks in one request\n"); 6883 err = -EINVAL; 6884 locks_free_lock(flock); 6885 goto out; 6886 } 6887 } 6888 } 6889 6890 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 6891 if (!smb_lock) { 6892 err = -EINVAL; 6893 locks_free_lock(flock); 6894 goto out; 6895 } 6896 } 6897 6898 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 6899 if (smb_lock->cmd < 0) { 6900 err = -EINVAL; 6901 goto out; 6902 } 6903 6904 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 6905 err = -EINVAL; 6906 goto out; 6907 } 6908 6909 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 6910 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 6911 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 6912 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 6913 err = -EINVAL; 6914 goto out; 6915 } 6916 6917 prior_lock = smb_lock->flags; 6918 6919 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 6920 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 6921 goto no_check_cl; 6922 6923 nolock = 1; 6924 /* check locks in connection list */ 6925 down_read(&conn_list_lock); 6926 list_for_each_entry(conn, &conn_list, conns_list) { 6927 spin_lock(&conn->llist_lock); 6928 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 6929 if (file_inode(cmp_lock->fl->fl_file) != 6930 file_inode(smb_lock->fl->fl_file)) 6931 continue; 6932 6933 if (smb_lock->fl->fl_type == F_UNLCK) { 6934 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file && 6935 cmp_lock->start == smb_lock->start && 6936 cmp_lock->end == smb_lock->end && 6937 !lock_defer_pending(cmp_lock->fl)) { 6938 nolock = 0; 6939 list_del(&cmp_lock->flist); 6940 list_del(&cmp_lock->clist); 6941 spin_unlock(&conn->llist_lock); 6942 up_read(&conn_list_lock); 6943 6944 locks_free_lock(cmp_lock->fl); 6945 kfree(cmp_lock); 6946 goto out_check_cl; 6947 } 6948 continue; 6949 } 6950 6951 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) { 6952 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 6953 continue; 6954 } else { 6955 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 6956 continue; 6957 } 6958 6959 /* check zero byte lock range */ 6960 if (cmp_lock->zero_len && !smb_lock->zero_len && 6961 cmp_lock->start > smb_lock->start && 6962 cmp_lock->start < smb_lock->end) { 6963 spin_unlock(&conn->llist_lock); 6964 up_read(&conn_list_lock); 6965 pr_err("previous lock conflict with zero byte lock range\n"); 6966 goto out; 6967 } 6968 6969 if (smb_lock->zero_len && !cmp_lock->zero_len && 6970 smb_lock->start > cmp_lock->start && 6971 smb_lock->start < cmp_lock->end) { 6972 spin_unlock(&conn->llist_lock); 6973 up_read(&conn_list_lock); 6974 pr_err("current lock conflict with zero byte lock range\n"); 6975 goto out; 6976 } 6977 6978 if (((cmp_lock->start <= smb_lock->start && 6979 cmp_lock->end > smb_lock->start) || 6980 (cmp_lock->start < smb_lock->end && 6981 cmp_lock->end >= smb_lock->end)) && 6982 !cmp_lock->zero_len && !smb_lock->zero_len) { 6983 spin_unlock(&conn->llist_lock); 6984 up_read(&conn_list_lock); 6985 pr_err("Not allow lock operation on exclusive lock range\n"); 6986 goto out; 6987 } 6988 } 6989 spin_unlock(&conn->llist_lock); 6990 } 6991 up_read(&conn_list_lock); 6992 out_check_cl: 6993 if (smb_lock->fl->fl_type == F_UNLCK && nolock) { 6994 pr_err("Try to unlock nolocked range\n"); 6995 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 6996 goto out; 6997 } 6998 6999 no_check_cl: 7000 if (smb_lock->zero_len) { 7001 err = 0; 7002 goto skip; 7003 } 7004 7005 flock = smb_lock->fl; 7006 list_del(&smb_lock->llist); 7007 retry: 7008 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7009 skip: 7010 if (flags & SMB2_LOCKFLAG_UNLOCK) { 7011 if (!rc) { 7012 ksmbd_debug(SMB, "File unlocked\n"); 7013 } else if (rc == -ENOENT) { 7014 rsp->hdr.Status = STATUS_NOT_LOCKED; 7015 goto out; 7016 } 7017 locks_free_lock(flock); 7018 kfree(smb_lock); 7019 } else { 7020 if (rc == FILE_LOCK_DEFERRED) { 7021 void **argv; 7022 7023 ksmbd_debug(SMB, 7024 "would have to wait for getting lock\n"); 7025 spin_lock(&work->conn->llist_lock); 7026 list_add_tail(&smb_lock->clist, 7027 &work->conn->lock_list); 7028 spin_unlock(&work->conn->llist_lock); 7029 list_add(&smb_lock->llist, &rollback_list); 7030 7031 argv = kmalloc(sizeof(void *), GFP_KERNEL); 7032 if (!argv) { 7033 err = -ENOMEM; 7034 goto out; 7035 } 7036 argv[0] = flock; 7037 7038 rc = setup_async_work(work, 7039 smb2_remove_blocked_lock, 7040 argv); 7041 if (rc) { 7042 err = -ENOMEM; 7043 goto out; 7044 } 7045 spin_lock(&fp->f_lock); 7046 list_add(&work->fp_entry, &fp->blocked_works); 7047 spin_unlock(&fp->f_lock); 7048 7049 smb2_send_interim_resp(work, STATUS_PENDING); 7050 7051 ksmbd_vfs_posix_lock_wait(flock); 7052 7053 spin_lock(&fp->f_lock); 7054 list_del(&work->fp_entry); 7055 spin_unlock(&fp->f_lock); 7056 7057 if (work->state != KSMBD_WORK_ACTIVE) { 7058 list_del(&smb_lock->llist); 7059 spin_lock(&work->conn->llist_lock); 7060 list_del(&smb_lock->clist); 7061 spin_unlock(&work->conn->llist_lock); 7062 locks_free_lock(flock); 7063 7064 if (work->state == KSMBD_WORK_CANCELLED) { 7065 rsp->hdr.Status = 7066 STATUS_CANCELLED; 7067 kfree(smb_lock); 7068 smb2_send_interim_resp(work, 7069 STATUS_CANCELLED); 7070 work->send_no_response = 1; 7071 goto out; 7072 } 7073 7074 init_smb2_rsp_hdr(work); 7075 smb2_set_err_rsp(work); 7076 rsp->hdr.Status = 7077 STATUS_RANGE_NOT_LOCKED; 7078 kfree(smb_lock); 7079 goto out2; 7080 } 7081 7082 list_del(&smb_lock->llist); 7083 spin_lock(&work->conn->llist_lock); 7084 list_del(&smb_lock->clist); 7085 spin_unlock(&work->conn->llist_lock); 7086 release_async_work(work); 7087 goto retry; 7088 } else if (!rc) { 7089 spin_lock(&work->conn->llist_lock); 7090 list_add_tail(&smb_lock->clist, 7091 &work->conn->lock_list); 7092 list_add_tail(&smb_lock->flist, 7093 &fp->lock_list); 7094 spin_unlock(&work->conn->llist_lock); 7095 list_add(&smb_lock->llist, &rollback_list); 7096 ksmbd_debug(SMB, "successful in taking lock\n"); 7097 } else { 7098 goto out; 7099 } 7100 } 7101 } 7102 7103 if (atomic_read(&fp->f_ci->op_count) > 1) 7104 smb_break_all_oplock(work, fp); 7105 7106 rsp->StructureSize = cpu_to_le16(4); 7107 ksmbd_debug(SMB, "successful in taking lock\n"); 7108 rsp->hdr.Status = STATUS_SUCCESS; 7109 rsp->Reserved = 0; 7110 inc_rfc1001_len(work->response_buf, 4); 7111 ksmbd_fd_put(work, fp); 7112 return 0; 7113 7114 out: 7115 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7116 locks_free_lock(smb_lock->fl); 7117 list_del(&smb_lock->llist); 7118 kfree(smb_lock); 7119 } 7120 7121 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7122 struct file_lock *rlock = NULL; 7123 7124 rlock = smb_flock_init(filp); 7125 rlock->fl_type = F_UNLCK; 7126 rlock->fl_start = smb_lock->start; 7127 rlock->fl_end = smb_lock->end; 7128 7129 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7130 if (rc) 7131 pr_err("rollback unlock fail : %d\n", rc); 7132 7133 list_del(&smb_lock->llist); 7134 spin_lock(&work->conn->llist_lock); 7135 if (!list_empty(&smb_lock->flist)) 7136 list_del(&smb_lock->flist); 7137 list_del(&smb_lock->clist); 7138 spin_unlock(&work->conn->llist_lock); 7139 7140 locks_free_lock(smb_lock->fl); 7141 locks_free_lock(rlock); 7142 kfree(smb_lock); 7143 } 7144 out2: 7145 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7146 7147 if (!rsp->hdr.Status) { 7148 if (err == -EINVAL) 7149 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7150 else if (err == -ENOMEM) 7151 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7152 else if (err == -ENOENT) 7153 rsp->hdr.Status = STATUS_FILE_CLOSED; 7154 else 7155 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7156 } 7157 7158 smb2_set_err_rsp(work); 7159 ksmbd_fd_put(work, fp); 7160 return err; 7161 } 7162 7163 static int fsctl_copychunk(struct ksmbd_work *work, 7164 struct copychunk_ioctl_req *ci_req, 7165 unsigned int cnt_code, 7166 unsigned int input_count, 7167 unsigned long long volatile_id, 7168 unsigned long long persistent_id, 7169 struct smb2_ioctl_rsp *rsp) 7170 { 7171 struct copychunk_ioctl_rsp *ci_rsp; 7172 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7173 struct srv_copychunk *chunks; 7174 unsigned int i, chunk_count, chunk_count_written = 0; 7175 unsigned int chunk_size_written = 0; 7176 loff_t total_size_written = 0; 7177 int ret = 0; 7178 7179 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7180 7181 rsp->VolatileFileId = volatile_id; 7182 rsp->PersistentFileId = persistent_id; 7183 ci_rsp->ChunksWritten = 7184 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7185 ci_rsp->ChunkBytesWritten = 7186 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7187 ci_rsp->TotalBytesWritten = 7188 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7189 7190 chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; 7191 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7192 if (chunk_count == 0) 7193 goto out; 7194 total_size_written = 0; 7195 7196 /* verify the SRV_COPYCHUNK_COPY packet */ 7197 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7198 input_count < offsetof(struct copychunk_ioctl_req, Chunks) + 7199 chunk_count * sizeof(struct srv_copychunk)) { 7200 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7201 return -EINVAL; 7202 } 7203 7204 for (i = 0; i < chunk_count; i++) { 7205 if (le32_to_cpu(chunks[i].Length) == 0 || 7206 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7207 break; 7208 total_size_written += le32_to_cpu(chunks[i].Length); 7209 } 7210 7211 if (i < chunk_count || 7212 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7213 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7214 return -EINVAL; 7215 } 7216 7217 src_fp = ksmbd_lookup_foreign_fd(work, 7218 le64_to_cpu(ci_req->ResumeKey[0])); 7219 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7220 ret = -EINVAL; 7221 if (!src_fp || 7222 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { 7223 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7224 goto out; 7225 } 7226 7227 if (!dst_fp) { 7228 rsp->hdr.Status = STATUS_FILE_CLOSED; 7229 goto out; 7230 } 7231 7232 /* 7233 * FILE_READ_DATA should only be included in 7234 * the FSCTL_COPYCHUNK case 7235 */ 7236 if (cnt_code == FSCTL_COPYCHUNK && 7237 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7238 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7239 goto out; 7240 } 7241 7242 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7243 chunks, chunk_count, 7244 &chunk_count_written, 7245 &chunk_size_written, 7246 &total_size_written); 7247 if (ret < 0) { 7248 if (ret == -EACCES) 7249 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7250 if (ret == -EAGAIN) 7251 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7252 else if (ret == -EBADF) 7253 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7254 else if (ret == -EFBIG || ret == -ENOSPC) 7255 rsp->hdr.Status = STATUS_DISK_FULL; 7256 else if (ret == -EINVAL) 7257 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7258 else if (ret == -EISDIR) 7259 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7260 else if (ret == -E2BIG) 7261 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7262 else 7263 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7264 } 7265 7266 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7267 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7268 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7269 out: 7270 ksmbd_fd_put(work, src_fp); 7271 ksmbd_fd_put(work, dst_fp); 7272 return ret; 7273 } 7274 7275 static __be32 idev_ipv4_address(struct in_device *idev) 7276 { 7277 __be32 addr = 0; 7278 7279 struct in_ifaddr *ifa; 7280 7281 rcu_read_lock(); 7282 in_dev_for_each_ifa_rcu(ifa, idev) { 7283 if (ifa->ifa_flags & IFA_F_SECONDARY) 7284 continue; 7285 7286 addr = ifa->ifa_address; 7287 break; 7288 } 7289 rcu_read_unlock(); 7290 return addr; 7291 } 7292 7293 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7294 struct smb2_ioctl_rsp *rsp, 7295 unsigned int out_buf_len) 7296 { 7297 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7298 int nbytes = 0; 7299 struct net_device *netdev; 7300 struct sockaddr_storage_rsp *sockaddr_storage; 7301 unsigned int flags; 7302 unsigned long long speed; 7303 7304 rtnl_lock(); 7305 for_each_netdev(&init_net, netdev) { 7306 bool ipv4_set = false; 7307 7308 if (netdev->type == ARPHRD_LOOPBACK) 7309 continue; 7310 7311 flags = dev_get_flags(netdev); 7312 if (!(flags & IFF_RUNNING)) 7313 continue; 7314 ipv6_retry: 7315 if (out_buf_len < 7316 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7317 rtnl_unlock(); 7318 return -ENOSPC; 7319 } 7320 7321 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7322 &rsp->Buffer[nbytes]; 7323 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7324 7325 nii_rsp->Capability = 0; 7326 if (netdev->real_num_tx_queues > 1) 7327 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); 7328 if (ksmbd_rdma_capable_netdev(netdev)) 7329 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); 7330 7331 nii_rsp->Next = cpu_to_le32(152); 7332 nii_rsp->Reserved = 0; 7333 7334 if (netdev->ethtool_ops->get_link_ksettings) { 7335 struct ethtool_link_ksettings cmd; 7336 7337 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7338 speed = cmd.base.speed; 7339 } else { 7340 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7341 "speed is unknown, defaulting to 1Gb/sec"); 7342 speed = SPEED_1000; 7343 } 7344 7345 speed *= 1000000; 7346 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7347 7348 sockaddr_storage = (struct sockaddr_storage_rsp *) 7349 nii_rsp->SockAddr_Storage; 7350 memset(sockaddr_storage, 0, 128); 7351 7352 if (!ipv4_set) { 7353 struct in_device *idev; 7354 7355 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); 7356 sockaddr_storage->addr4.Port = 0; 7357 7358 idev = __in_dev_get_rtnl(netdev); 7359 if (!idev) 7360 continue; 7361 sockaddr_storage->addr4.IPv4address = 7362 idev_ipv4_address(idev); 7363 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7364 ipv4_set = true; 7365 goto ipv6_retry; 7366 } else { 7367 struct inet6_dev *idev6; 7368 struct inet6_ifaddr *ifa; 7369 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; 7370 7371 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); 7372 sockaddr_storage->addr6.Port = 0; 7373 sockaddr_storage->addr6.FlowInfo = 0; 7374 7375 idev6 = __in6_dev_get(netdev); 7376 if (!idev6) 7377 continue; 7378 7379 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7380 if (ifa->flags & (IFA_F_TENTATIVE | 7381 IFA_F_DEPRECATED)) 7382 continue; 7383 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7384 break; 7385 } 7386 sockaddr_storage->addr6.ScopeId = 0; 7387 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7388 } 7389 } 7390 rtnl_unlock(); 7391 7392 /* zero if this is last one */ 7393 if (nii_rsp) 7394 nii_rsp->Next = 0; 7395 7396 rsp->PersistentFileId = SMB2_NO_FID; 7397 rsp->VolatileFileId = SMB2_NO_FID; 7398 return nbytes; 7399 } 7400 7401 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7402 struct validate_negotiate_info_req *neg_req, 7403 struct validate_negotiate_info_rsp *neg_rsp, 7404 unsigned int in_buf_len) 7405 { 7406 int ret = 0; 7407 int dialect; 7408 7409 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7410 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7411 return -EINVAL; 7412 7413 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7414 neg_req->DialectCount); 7415 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7416 ret = -EINVAL; 7417 goto err_out; 7418 } 7419 7420 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7421 ret = -EINVAL; 7422 goto err_out; 7423 } 7424 7425 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7426 ret = -EINVAL; 7427 goto err_out; 7428 } 7429 7430 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7431 ret = -EINVAL; 7432 goto err_out; 7433 } 7434 7435 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 7436 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 7437 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 7438 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 7439 err_out: 7440 return ret; 7441 } 7442 7443 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 7444 struct file_allocated_range_buffer *qar_req, 7445 struct file_allocated_range_buffer *qar_rsp, 7446 unsigned int in_count, unsigned int *out_count) 7447 { 7448 struct ksmbd_file *fp; 7449 loff_t start, length; 7450 int ret = 0; 7451 7452 *out_count = 0; 7453 if (in_count == 0) 7454 return -EINVAL; 7455 7456 start = le64_to_cpu(qar_req->file_offset); 7457 length = le64_to_cpu(qar_req->length); 7458 7459 if (start < 0 || length < 0) 7460 return -EINVAL; 7461 7462 fp = ksmbd_lookup_fd_fast(work, id); 7463 if (!fp) 7464 return -ENOENT; 7465 7466 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 7467 qar_rsp, in_count, out_count); 7468 if (ret && ret != -E2BIG) 7469 *out_count = 0; 7470 7471 ksmbd_fd_put(work, fp); 7472 return ret; 7473 } 7474 7475 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 7476 unsigned int out_buf_len, 7477 struct smb2_ioctl_req *req, 7478 struct smb2_ioctl_rsp *rsp) 7479 { 7480 struct ksmbd_rpc_command *rpc_resp; 7481 char *data_buf = (char *)&req->Buffer[0]; 7482 int nbytes = 0; 7483 7484 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 7485 le32_to_cpu(req->InputCount)); 7486 if (rpc_resp) { 7487 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 7488 /* 7489 * set STATUS_SOME_NOT_MAPPED response 7490 * for unknown domain sid. 7491 */ 7492 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 7493 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7494 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7495 goto out; 7496 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 7497 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7498 goto out; 7499 } 7500 7501 nbytes = rpc_resp->payload_sz; 7502 if (rpc_resp->payload_sz > out_buf_len) { 7503 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7504 nbytes = out_buf_len; 7505 } 7506 7507 if (!rpc_resp->payload_sz) { 7508 rsp->hdr.Status = 7509 STATUS_UNEXPECTED_IO_ERROR; 7510 goto out; 7511 } 7512 7513 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 7514 } 7515 out: 7516 kvfree(rpc_resp); 7517 return nbytes; 7518 } 7519 7520 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 7521 struct file_sparse *sparse) 7522 { 7523 struct ksmbd_file *fp; 7524 struct mnt_idmap *idmap; 7525 int ret = 0; 7526 __le32 old_fattr; 7527 7528 fp = ksmbd_lookup_fd_fast(work, id); 7529 if (!fp) 7530 return -ENOENT; 7531 idmap = file_mnt_idmap(fp->filp); 7532 7533 old_fattr = fp->f_ci->m_fattr; 7534 if (sparse->SetSparse) 7535 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 7536 else 7537 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 7538 7539 if (fp->f_ci->m_fattr != old_fattr && 7540 test_share_config_flag(work->tcon->share_conf, 7541 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 7542 struct xattr_dos_attrib da; 7543 7544 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 7545 fp->filp->f_path.dentry, &da); 7546 if (ret <= 0) 7547 goto out; 7548 7549 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 7550 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 7551 &fp->filp->f_path, &da); 7552 if (ret) 7553 fp->f_ci->m_fattr = old_fattr; 7554 } 7555 7556 out: 7557 ksmbd_fd_put(work, fp); 7558 return ret; 7559 } 7560 7561 static int fsctl_request_resume_key(struct ksmbd_work *work, 7562 struct smb2_ioctl_req *req, 7563 struct resume_key_ioctl_rsp *key_rsp) 7564 { 7565 struct ksmbd_file *fp; 7566 7567 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7568 if (!fp) 7569 return -ENOENT; 7570 7571 memset(key_rsp, 0, sizeof(*key_rsp)); 7572 key_rsp->ResumeKey[0] = req->VolatileFileId; 7573 key_rsp->ResumeKey[1] = req->PersistentFileId; 7574 ksmbd_fd_put(work, fp); 7575 7576 return 0; 7577 } 7578 7579 /** 7580 * smb2_ioctl() - handler for smb2 ioctl command 7581 * @work: smb work containing ioctl command buffer 7582 * 7583 * Return: 0 on success, otherwise error 7584 */ 7585 int smb2_ioctl(struct ksmbd_work *work) 7586 { 7587 struct smb2_ioctl_req *req; 7588 struct smb2_ioctl_rsp *rsp; 7589 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 7590 u64 id = KSMBD_NO_FID; 7591 struct ksmbd_conn *conn = work->conn; 7592 int ret = 0; 7593 7594 if (work->next_smb2_rcv_hdr_off) { 7595 req = ksmbd_req_buf_next(work); 7596 rsp = ksmbd_resp_buf_next(work); 7597 if (!has_file_id(req->VolatileFileId)) { 7598 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 7599 work->compound_fid); 7600 id = work->compound_fid; 7601 } 7602 } else { 7603 req = smb2_get_msg(work->request_buf); 7604 rsp = smb2_get_msg(work->response_buf); 7605 } 7606 7607 if (!has_file_id(id)) 7608 id = req->VolatileFileId; 7609 7610 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 7611 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7612 goto out; 7613 } 7614 7615 cnt_code = le32_to_cpu(req->CtlCode); 7616 ret = smb2_calc_max_out_buf_len(work, 48, 7617 le32_to_cpu(req->MaxOutputResponse)); 7618 if (ret < 0) { 7619 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7620 goto out; 7621 } 7622 out_buf_len = (unsigned int)ret; 7623 in_buf_len = le32_to_cpu(req->InputCount); 7624 7625 switch (cnt_code) { 7626 case FSCTL_DFS_GET_REFERRALS: 7627 case FSCTL_DFS_GET_REFERRALS_EX: 7628 /* Not support DFS yet */ 7629 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 7630 goto out; 7631 case FSCTL_CREATE_OR_GET_OBJECT_ID: 7632 { 7633 struct file_object_buf_type1_ioctl_rsp *obj_buf; 7634 7635 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 7636 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 7637 &rsp->Buffer[0]; 7638 7639 /* 7640 * TODO: This is dummy implementation to pass smbtorture 7641 * Need to check correct response later 7642 */ 7643 memset(obj_buf->ObjectId, 0x0, 16); 7644 memset(obj_buf->BirthVolumeId, 0x0, 16); 7645 memset(obj_buf->BirthObjectId, 0x0, 16); 7646 memset(obj_buf->DomainId, 0x0, 16); 7647 7648 break; 7649 } 7650 case FSCTL_PIPE_TRANSCEIVE: 7651 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 7652 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 7653 break; 7654 case FSCTL_VALIDATE_NEGOTIATE_INFO: 7655 if (conn->dialect < SMB30_PROT_ID) { 7656 ret = -EOPNOTSUPP; 7657 goto out; 7658 } 7659 7660 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 7661 Dialects)) { 7662 ret = -EINVAL; 7663 goto out; 7664 } 7665 7666 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 7667 ret = -EINVAL; 7668 goto out; 7669 } 7670 7671 ret = fsctl_validate_negotiate_info(conn, 7672 (struct validate_negotiate_info_req *)&req->Buffer[0], 7673 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 7674 in_buf_len); 7675 if (ret < 0) 7676 goto out; 7677 7678 nbytes = sizeof(struct validate_negotiate_info_rsp); 7679 rsp->PersistentFileId = SMB2_NO_FID; 7680 rsp->VolatileFileId = SMB2_NO_FID; 7681 break; 7682 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 7683 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 7684 if (ret < 0) 7685 goto out; 7686 nbytes = ret; 7687 break; 7688 case FSCTL_REQUEST_RESUME_KEY: 7689 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 7690 ret = -EINVAL; 7691 goto out; 7692 } 7693 7694 ret = fsctl_request_resume_key(work, req, 7695 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 7696 if (ret < 0) 7697 goto out; 7698 rsp->PersistentFileId = req->PersistentFileId; 7699 rsp->VolatileFileId = req->VolatileFileId; 7700 nbytes = sizeof(struct resume_key_ioctl_rsp); 7701 break; 7702 case FSCTL_COPYCHUNK: 7703 case FSCTL_COPYCHUNK_WRITE: 7704 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7705 ksmbd_debug(SMB, 7706 "User does not have write permission\n"); 7707 ret = -EACCES; 7708 goto out; 7709 } 7710 7711 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { 7712 ret = -EINVAL; 7713 goto out; 7714 } 7715 7716 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 7717 ret = -EINVAL; 7718 goto out; 7719 } 7720 7721 nbytes = sizeof(struct copychunk_ioctl_rsp); 7722 rsp->VolatileFileId = req->VolatileFileId; 7723 rsp->PersistentFileId = req->PersistentFileId; 7724 fsctl_copychunk(work, 7725 (struct copychunk_ioctl_req *)&req->Buffer[0], 7726 le32_to_cpu(req->CtlCode), 7727 le32_to_cpu(req->InputCount), 7728 req->VolatileFileId, 7729 req->PersistentFileId, 7730 rsp); 7731 break; 7732 case FSCTL_SET_SPARSE: 7733 if (in_buf_len < sizeof(struct file_sparse)) { 7734 ret = -EINVAL; 7735 goto out; 7736 } 7737 7738 ret = fsctl_set_sparse(work, id, 7739 (struct file_sparse *)&req->Buffer[0]); 7740 if (ret < 0) 7741 goto out; 7742 break; 7743 case FSCTL_SET_ZERO_DATA: 7744 { 7745 struct file_zero_data_information *zero_data; 7746 struct ksmbd_file *fp; 7747 loff_t off, len, bfz; 7748 7749 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7750 ksmbd_debug(SMB, 7751 "User does not have write permission\n"); 7752 ret = -EACCES; 7753 goto out; 7754 } 7755 7756 if (in_buf_len < sizeof(struct file_zero_data_information)) { 7757 ret = -EINVAL; 7758 goto out; 7759 } 7760 7761 zero_data = 7762 (struct file_zero_data_information *)&req->Buffer[0]; 7763 7764 off = le64_to_cpu(zero_data->FileOffset); 7765 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 7766 if (off < 0 || bfz < 0 || off > bfz) { 7767 ret = -EINVAL; 7768 goto out; 7769 } 7770 7771 len = bfz - off; 7772 if (len) { 7773 fp = ksmbd_lookup_fd_fast(work, id); 7774 if (!fp) { 7775 ret = -ENOENT; 7776 goto out; 7777 } 7778 7779 ret = ksmbd_vfs_zero_data(work, fp, off, len); 7780 ksmbd_fd_put(work, fp); 7781 if (ret < 0) 7782 goto out; 7783 } 7784 break; 7785 } 7786 case FSCTL_QUERY_ALLOCATED_RANGES: 7787 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 7788 ret = -EINVAL; 7789 goto out; 7790 } 7791 7792 ret = fsctl_query_allocated_ranges(work, id, 7793 (struct file_allocated_range_buffer *)&req->Buffer[0], 7794 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 7795 out_buf_len / 7796 sizeof(struct file_allocated_range_buffer), &nbytes); 7797 if (ret == -E2BIG) { 7798 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7799 } else if (ret < 0) { 7800 nbytes = 0; 7801 goto out; 7802 } 7803 7804 nbytes *= sizeof(struct file_allocated_range_buffer); 7805 break; 7806 case FSCTL_GET_REPARSE_POINT: 7807 { 7808 struct reparse_data_buffer *reparse_ptr; 7809 struct ksmbd_file *fp; 7810 7811 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 7812 fp = ksmbd_lookup_fd_fast(work, id); 7813 if (!fp) { 7814 pr_err("not found fp!!\n"); 7815 ret = -ENOENT; 7816 goto out; 7817 } 7818 7819 reparse_ptr->ReparseTag = 7820 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 7821 reparse_ptr->ReparseDataLength = 0; 7822 ksmbd_fd_put(work, fp); 7823 nbytes = sizeof(struct reparse_data_buffer); 7824 break; 7825 } 7826 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 7827 { 7828 struct ksmbd_file *fp_in, *fp_out = NULL; 7829 struct duplicate_extents_to_file *dup_ext; 7830 loff_t src_off, dst_off, length, cloned; 7831 7832 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 7833 ret = -EINVAL; 7834 goto out; 7835 } 7836 7837 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0]; 7838 7839 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 7840 dup_ext->PersistentFileHandle); 7841 if (!fp_in) { 7842 pr_err("not found file handle in duplicate extent to file\n"); 7843 ret = -ENOENT; 7844 goto out; 7845 } 7846 7847 fp_out = ksmbd_lookup_fd_fast(work, id); 7848 if (!fp_out) { 7849 pr_err("not found fp\n"); 7850 ret = -ENOENT; 7851 goto dup_ext_out; 7852 } 7853 7854 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 7855 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 7856 length = le64_to_cpu(dup_ext->ByteCount); 7857 /* 7858 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 7859 * should fall back to vfs_copy_file_range(). This could be 7860 * beneficial when re-exporting nfs/smb mount, but note that 7861 * this can result in partial copy that returns an error status. 7862 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 7863 * fall back to vfs_copy_file_range(), should be avoided when 7864 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 7865 */ 7866 cloned = vfs_clone_file_range(fp_in->filp, src_off, 7867 fp_out->filp, dst_off, length, 0); 7868 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 7869 ret = -EOPNOTSUPP; 7870 goto dup_ext_out; 7871 } else if (cloned != length) { 7872 cloned = vfs_copy_file_range(fp_in->filp, src_off, 7873 fp_out->filp, dst_off, 7874 length, 0); 7875 if (cloned != length) { 7876 if (cloned < 0) 7877 ret = cloned; 7878 else 7879 ret = -EINVAL; 7880 } 7881 } 7882 7883 dup_ext_out: 7884 ksmbd_fd_put(work, fp_in); 7885 ksmbd_fd_put(work, fp_out); 7886 if (ret < 0) 7887 goto out; 7888 break; 7889 } 7890 default: 7891 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 7892 cnt_code); 7893 ret = -EOPNOTSUPP; 7894 goto out; 7895 } 7896 7897 rsp->CtlCode = cpu_to_le32(cnt_code); 7898 rsp->InputCount = cpu_to_le32(0); 7899 rsp->InputOffset = cpu_to_le32(112); 7900 rsp->OutputOffset = cpu_to_le32(112); 7901 rsp->OutputCount = cpu_to_le32(nbytes); 7902 rsp->StructureSize = cpu_to_le16(49); 7903 rsp->Reserved = cpu_to_le16(0); 7904 rsp->Flags = cpu_to_le32(0); 7905 rsp->Reserved2 = cpu_to_le32(0); 7906 inc_rfc1001_len(work->response_buf, 48 + nbytes); 7907 7908 return 0; 7909 7910 out: 7911 if (ret == -EACCES) 7912 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7913 else if (ret == -ENOENT) 7914 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7915 else if (ret == -EOPNOTSUPP) 7916 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7917 else if (ret == -ENOSPC) 7918 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 7919 else if (ret < 0 || rsp->hdr.Status == 0) 7920 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7921 smb2_set_err_rsp(work); 7922 return 0; 7923 } 7924 7925 /** 7926 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 7927 * @work: smb work containing oplock break command buffer 7928 * 7929 * Return: 0 7930 */ 7931 static void smb20_oplock_break_ack(struct ksmbd_work *work) 7932 { 7933 struct smb2_oplock_break *req; 7934 struct smb2_oplock_break *rsp; 7935 struct ksmbd_file *fp; 7936 struct oplock_info *opinfo = NULL; 7937 __le32 err = 0; 7938 int ret = 0; 7939 u64 volatile_id, persistent_id; 7940 char req_oplevel = 0, rsp_oplevel = 0; 7941 unsigned int oplock_change_type; 7942 7943 WORK_BUFFERS(work, req, rsp); 7944 7945 volatile_id = req->VolatileFid; 7946 persistent_id = req->PersistentFid; 7947 req_oplevel = req->OplockLevel; 7948 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 7949 volatile_id, persistent_id, req_oplevel); 7950 7951 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7952 if (!fp) { 7953 rsp->hdr.Status = STATUS_FILE_CLOSED; 7954 smb2_set_err_rsp(work); 7955 return; 7956 } 7957 7958 opinfo = opinfo_get(fp); 7959 if (!opinfo) { 7960 pr_err("unexpected null oplock_info\n"); 7961 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 7962 smb2_set_err_rsp(work); 7963 ksmbd_fd_put(work, fp); 7964 return; 7965 } 7966 7967 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 7968 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 7969 goto err_out; 7970 } 7971 7972 if (opinfo->op_state == OPLOCK_STATE_NONE) { 7973 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 7974 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 7975 goto err_out; 7976 } 7977 7978 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 7979 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 7980 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 7981 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 7982 err = STATUS_INVALID_OPLOCK_PROTOCOL; 7983 oplock_change_type = OPLOCK_WRITE_TO_NONE; 7984 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 7985 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 7986 err = STATUS_INVALID_OPLOCK_PROTOCOL; 7987 oplock_change_type = OPLOCK_READ_TO_NONE; 7988 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 7989 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 7990 err = STATUS_INVALID_DEVICE_STATE; 7991 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 7992 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 7993 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 7994 oplock_change_type = OPLOCK_WRITE_TO_READ; 7995 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 7996 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 7997 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 7998 oplock_change_type = OPLOCK_WRITE_TO_NONE; 7999 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8000 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8001 oplock_change_type = OPLOCK_READ_TO_NONE; 8002 } else { 8003 oplock_change_type = 0; 8004 } 8005 } else { 8006 oplock_change_type = 0; 8007 } 8008 8009 switch (oplock_change_type) { 8010 case OPLOCK_WRITE_TO_READ: 8011 ret = opinfo_write_to_read(opinfo); 8012 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8013 break; 8014 case OPLOCK_WRITE_TO_NONE: 8015 ret = opinfo_write_to_none(opinfo); 8016 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8017 break; 8018 case OPLOCK_READ_TO_NONE: 8019 ret = opinfo_read_to_none(opinfo); 8020 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8021 break; 8022 default: 8023 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8024 opinfo->level, rsp_oplevel); 8025 } 8026 8027 if (ret < 0) { 8028 rsp->hdr.Status = err; 8029 goto err_out; 8030 } 8031 8032 opinfo_put(opinfo); 8033 ksmbd_fd_put(work, fp); 8034 opinfo->op_state = OPLOCK_STATE_NONE; 8035 wake_up_interruptible_all(&opinfo->oplock_q); 8036 8037 rsp->StructureSize = cpu_to_le16(24); 8038 rsp->OplockLevel = rsp_oplevel; 8039 rsp->Reserved = 0; 8040 rsp->Reserved2 = 0; 8041 rsp->VolatileFid = volatile_id; 8042 rsp->PersistentFid = persistent_id; 8043 inc_rfc1001_len(work->response_buf, 24); 8044 return; 8045 8046 err_out: 8047 opinfo->op_state = OPLOCK_STATE_NONE; 8048 wake_up_interruptible_all(&opinfo->oplock_q); 8049 8050 opinfo_put(opinfo); 8051 ksmbd_fd_put(work, fp); 8052 smb2_set_err_rsp(work); 8053 } 8054 8055 static int check_lease_state(struct lease *lease, __le32 req_state) 8056 { 8057 if ((lease->new_state == 8058 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8059 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8060 lease->new_state = req_state; 8061 return 0; 8062 } 8063 8064 if (lease->new_state == req_state) 8065 return 0; 8066 8067 return 1; 8068 } 8069 8070 /** 8071 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8072 * @work: smb work containing lease break command buffer 8073 * 8074 * Return: 0 8075 */ 8076 static void smb21_lease_break_ack(struct ksmbd_work *work) 8077 { 8078 struct ksmbd_conn *conn = work->conn; 8079 struct smb2_lease_ack *req; 8080 struct smb2_lease_ack *rsp; 8081 struct oplock_info *opinfo; 8082 __le32 err = 0; 8083 int ret = 0; 8084 unsigned int lease_change_type; 8085 __le32 lease_state; 8086 struct lease *lease; 8087 8088 WORK_BUFFERS(work, req, rsp); 8089 8090 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8091 le32_to_cpu(req->LeaseState)); 8092 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8093 if (!opinfo) { 8094 ksmbd_debug(OPLOCK, "file not opened\n"); 8095 smb2_set_err_rsp(work); 8096 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8097 return; 8098 } 8099 lease = opinfo->o_lease; 8100 8101 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8102 pr_err("unexpected lease break state 0x%x\n", 8103 opinfo->op_state); 8104 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8105 goto err_out; 8106 } 8107 8108 if (check_lease_state(lease, req->LeaseState)) { 8109 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8110 ksmbd_debug(OPLOCK, 8111 "req lease state: 0x%x, expected state: 0x%x\n", 8112 req->LeaseState, lease->new_state); 8113 goto err_out; 8114 } 8115 8116 if (!atomic_read(&opinfo->breaking_cnt)) { 8117 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8118 goto err_out; 8119 } 8120 8121 /* check for bad lease state */ 8122 if (req->LeaseState & 8123 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8124 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8125 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8126 lease_change_type = OPLOCK_WRITE_TO_NONE; 8127 else 8128 lease_change_type = OPLOCK_READ_TO_NONE; 8129 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8130 le32_to_cpu(lease->state), 8131 le32_to_cpu(req->LeaseState)); 8132 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8133 req->LeaseState != SMB2_LEASE_NONE_LE) { 8134 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8135 lease_change_type = OPLOCK_READ_TO_NONE; 8136 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8137 le32_to_cpu(lease->state), 8138 le32_to_cpu(req->LeaseState)); 8139 } else { 8140 /* valid lease state changes */ 8141 err = STATUS_INVALID_DEVICE_STATE; 8142 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8143 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8144 lease_change_type = OPLOCK_WRITE_TO_NONE; 8145 else 8146 lease_change_type = OPLOCK_READ_TO_NONE; 8147 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8148 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8149 lease_change_type = OPLOCK_WRITE_TO_READ; 8150 else 8151 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8152 } else { 8153 lease_change_type = 0; 8154 } 8155 } 8156 8157 switch (lease_change_type) { 8158 case OPLOCK_WRITE_TO_READ: 8159 ret = opinfo_write_to_read(opinfo); 8160 break; 8161 case OPLOCK_READ_HANDLE_TO_READ: 8162 ret = opinfo_read_handle_to_read(opinfo); 8163 break; 8164 case OPLOCK_WRITE_TO_NONE: 8165 ret = opinfo_write_to_none(opinfo); 8166 break; 8167 case OPLOCK_READ_TO_NONE: 8168 ret = opinfo_read_to_none(opinfo); 8169 break; 8170 default: 8171 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8172 le32_to_cpu(lease->state), 8173 le32_to_cpu(req->LeaseState)); 8174 } 8175 8176 lease_state = lease->state; 8177 opinfo->op_state = OPLOCK_STATE_NONE; 8178 wake_up_interruptible_all(&opinfo->oplock_q); 8179 atomic_dec(&opinfo->breaking_cnt); 8180 wake_up_interruptible_all(&opinfo->oplock_brk); 8181 opinfo_put(opinfo); 8182 8183 if (ret < 0) { 8184 rsp->hdr.Status = err; 8185 goto err_out; 8186 } 8187 8188 rsp->StructureSize = cpu_to_le16(36); 8189 rsp->Reserved = 0; 8190 rsp->Flags = 0; 8191 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8192 rsp->LeaseState = lease_state; 8193 rsp->LeaseDuration = 0; 8194 inc_rfc1001_len(work->response_buf, 36); 8195 return; 8196 8197 err_out: 8198 opinfo->op_state = OPLOCK_STATE_NONE; 8199 wake_up_interruptible_all(&opinfo->oplock_q); 8200 atomic_dec(&opinfo->breaking_cnt); 8201 wake_up_interruptible_all(&opinfo->oplock_brk); 8202 8203 opinfo_put(opinfo); 8204 smb2_set_err_rsp(work); 8205 } 8206 8207 /** 8208 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8209 * @work: smb work containing oplock/lease break command buffer 8210 * 8211 * Return: 0 8212 */ 8213 int smb2_oplock_break(struct ksmbd_work *work) 8214 { 8215 struct smb2_oplock_break *req; 8216 struct smb2_oplock_break *rsp; 8217 8218 WORK_BUFFERS(work, req, rsp); 8219 8220 switch (le16_to_cpu(req->StructureSize)) { 8221 case OP_BREAK_STRUCT_SIZE_20: 8222 smb20_oplock_break_ack(work); 8223 break; 8224 case OP_BREAK_STRUCT_SIZE_21: 8225 smb21_lease_break_ack(work); 8226 break; 8227 default: 8228 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8229 le16_to_cpu(req->StructureSize)); 8230 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8231 smb2_set_err_rsp(work); 8232 } 8233 8234 return 0; 8235 } 8236 8237 /** 8238 * smb2_notify() - handler for smb2 notify request 8239 * @work: smb work containing notify command buffer 8240 * 8241 * Return: 0 8242 */ 8243 int smb2_notify(struct ksmbd_work *work) 8244 { 8245 struct smb2_change_notify_req *req; 8246 struct smb2_change_notify_rsp *rsp; 8247 8248 WORK_BUFFERS(work, req, rsp); 8249 8250 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8251 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8252 smb2_set_err_rsp(work); 8253 return 0; 8254 } 8255 8256 smb2_set_err_rsp(work); 8257 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8258 return 0; 8259 } 8260 8261 /** 8262 * smb2_is_sign_req() - handler for checking packet signing status 8263 * @work: smb work containing notify command buffer 8264 * @command: SMB2 command id 8265 * 8266 * Return: true if packed is signed, false otherwise 8267 */ 8268 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8269 { 8270 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); 8271 8272 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8273 command != SMB2_NEGOTIATE_HE && 8274 command != SMB2_SESSION_SETUP_HE && 8275 command != SMB2_OPLOCK_BREAK_HE) 8276 return true; 8277 8278 return false; 8279 } 8280 8281 /** 8282 * smb2_check_sign_req() - handler for req packet sign processing 8283 * @work: smb work containing notify command buffer 8284 * 8285 * Return: 1 on success, 0 otherwise 8286 */ 8287 int smb2_check_sign_req(struct ksmbd_work *work) 8288 { 8289 struct smb2_hdr *hdr; 8290 char signature_req[SMB2_SIGNATURE_SIZE]; 8291 char signature[SMB2_HMACSHA256_SIZE]; 8292 struct kvec iov[1]; 8293 size_t len; 8294 8295 hdr = smb2_get_msg(work->request_buf); 8296 if (work->next_smb2_rcv_hdr_off) 8297 hdr = ksmbd_req_buf_next(work); 8298 8299 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8300 len = get_rfc1002_len(work->request_buf); 8301 else if (hdr->NextCommand) 8302 len = le32_to_cpu(hdr->NextCommand); 8303 else 8304 len = get_rfc1002_len(work->request_buf) - 8305 work->next_smb2_rcv_hdr_off; 8306 8307 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8308 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8309 8310 iov[0].iov_base = (char *)&hdr->ProtocolId; 8311 iov[0].iov_len = len; 8312 8313 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8314 signature)) 8315 return 0; 8316 8317 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8318 pr_err("bad smb2 signature\n"); 8319 return 0; 8320 } 8321 8322 return 1; 8323 } 8324 8325 /** 8326 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8327 * @work: smb work containing notify command buffer 8328 * 8329 */ 8330 void smb2_set_sign_rsp(struct ksmbd_work *work) 8331 { 8332 struct smb2_hdr *hdr; 8333 struct smb2_hdr *req_hdr; 8334 char signature[SMB2_HMACSHA256_SIZE]; 8335 struct kvec iov[2]; 8336 size_t len; 8337 int n_vec = 1; 8338 8339 hdr = smb2_get_msg(work->response_buf); 8340 if (work->next_smb2_rsp_hdr_off) 8341 hdr = ksmbd_resp_buf_next(work); 8342 8343 req_hdr = ksmbd_req_buf_next(work); 8344 8345 if (!work->next_smb2_rsp_hdr_off) { 8346 len = get_rfc1002_len(work->response_buf); 8347 if (req_hdr->NextCommand) 8348 len = ALIGN(len, 8); 8349 } else { 8350 len = get_rfc1002_len(work->response_buf) - 8351 work->next_smb2_rsp_hdr_off; 8352 len = ALIGN(len, 8); 8353 } 8354 8355 if (req_hdr->NextCommand) 8356 hdr->NextCommand = cpu_to_le32(len); 8357 8358 hdr->Flags |= SMB2_FLAGS_SIGNED; 8359 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8360 8361 iov[0].iov_base = (char *)&hdr->ProtocolId; 8362 iov[0].iov_len = len; 8363 8364 if (work->aux_payload_sz) { 8365 iov[0].iov_len -= work->aux_payload_sz; 8366 8367 iov[1].iov_base = work->aux_payload_buf; 8368 iov[1].iov_len = work->aux_payload_sz; 8369 n_vec++; 8370 } 8371 8372 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8373 signature)) 8374 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8375 } 8376 8377 /** 8378 * smb3_check_sign_req() - handler for req packet sign processing 8379 * @work: smb work containing notify command buffer 8380 * 8381 * Return: 1 on success, 0 otherwise 8382 */ 8383 int smb3_check_sign_req(struct ksmbd_work *work) 8384 { 8385 struct ksmbd_conn *conn = work->conn; 8386 char *signing_key; 8387 struct smb2_hdr *hdr; 8388 struct channel *chann; 8389 char signature_req[SMB2_SIGNATURE_SIZE]; 8390 char signature[SMB2_CMACAES_SIZE]; 8391 struct kvec iov[1]; 8392 size_t len; 8393 8394 hdr = smb2_get_msg(work->request_buf); 8395 if (work->next_smb2_rcv_hdr_off) 8396 hdr = ksmbd_req_buf_next(work); 8397 8398 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8399 len = get_rfc1002_len(work->request_buf); 8400 else if (hdr->NextCommand) 8401 len = le32_to_cpu(hdr->NextCommand); 8402 else 8403 len = get_rfc1002_len(work->request_buf) - 8404 work->next_smb2_rcv_hdr_off; 8405 8406 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8407 signing_key = work->sess->smb3signingkey; 8408 } else { 8409 chann = lookup_chann_list(work->sess, conn); 8410 if (!chann) { 8411 return 0; 8412 } 8413 signing_key = chann->smb3signingkey; 8414 } 8415 8416 if (!signing_key) { 8417 pr_err("SMB3 signing key is not generated\n"); 8418 return 0; 8419 } 8420 8421 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8422 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8423 iov[0].iov_base = (char *)&hdr->ProtocolId; 8424 iov[0].iov_len = len; 8425 8426 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8427 return 0; 8428 8429 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8430 pr_err("bad smb2 signature\n"); 8431 return 0; 8432 } 8433 8434 return 1; 8435 } 8436 8437 /** 8438 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8439 * @work: smb work containing notify command buffer 8440 * 8441 */ 8442 void smb3_set_sign_rsp(struct ksmbd_work *work) 8443 { 8444 struct ksmbd_conn *conn = work->conn; 8445 struct smb2_hdr *req_hdr, *hdr; 8446 struct channel *chann; 8447 char signature[SMB2_CMACAES_SIZE]; 8448 struct kvec iov[2]; 8449 int n_vec = 1; 8450 size_t len; 8451 char *signing_key; 8452 8453 hdr = smb2_get_msg(work->response_buf); 8454 if (work->next_smb2_rsp_hdr_off) 8455 hdr = ksmbd_resp_buf_next(work); 8456 8457 req_hdr = ksmbd_req_buf_next(work); 8458 8459 if (!work->next_smb2_rsp_hdr_off) { 8460 len = get_rfc1002_len(work->response_buf); 8461 if (req_hdr->NextCommand) 8462 len = ALIGN(len, 8); 8463 } else { 8464 len = get_rfc1002_len(work->response_buf) - 8465 work->next_smb2_rsp_hdr_off; 8466 len = ALIGN(len, 8); 8467 } 8468 8469 if (conn->binding == false && 8470 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8471 signing_key = work->sess->smb3signingkey; 8472 } else { 8473 chann = lookup_chann_list(work->sess, work->conn); 8474 if (!chann) { 8475 return; 8476 } 8477 signing_key = chann->smb3signingkey; 8478 } 8479 8480 if (!signing_key) 8481 return; 8482 8483 if (req_hdr->NextCommand) 8484 hdr->NextCommand = cpu_to_le32(len); 8485 8486 hdr->Flags |= SMB2_FLAGS_SIGNED; 8487 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8488 iov[0].iov_base = (char *)&hdr->ProtocolId; 8489 iov[0].iov_len = len; 8490 if (work->aux_payload_sz) { 8491 iov[0].iov_len -= work->aux_payload_sz; 8492 iov[1].iov_base = work->aux_payload_buf; 8493 iov[1].iov_len = work->aux_payload_sz; 8494 n_vec++; 8495 } 8496 8497 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature)) 8498 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8499 } 8500 8501 /** 8502 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 8503 * @work: smb work containing response buffer 8504 * 8505 */ 8506 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 8507 { 8508 struct ksmbd_conn *conn = work->conn; 8509 struct ksmbd_session *sess = work->sess; 8510 struct smb2_hdr *req, *rsp; 8511 8512 if (conn->dialect != SMB311_PROT_ID) 8513 return; 8514 8515 WORK_BUFFERS(work, req, rsp); 8516 8517 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 8518 conn->preauth_info) 8519 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8520 conn->preauth_info->Preauth_HashValue); 8521 8522 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 8523 __u8 *hash_value; 8524 8525 if (conn->binding) { 8526 struct preauth_session *preauth_sess; 8527 8528 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 8529 if (!preauth_sess) 8530 return; 8531 hash_value = preauth_sess->Preauth_HashValue; 8532 } else { 8533 hash_value = sess->Preauth_HashValue; 8534 if (!hash_value) 8535 return; 8536 } 8537 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8538 hash_value); 8539 } 8540 } 8541 8542 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 8543 { 8544 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 8545 struct smb2_hdr *hdr = smb2_get_msg(old_buf); 8546 unsigned int orig_len = get_rfc1002_len(old_buf); 8547 8548 /* tr_buf must be cleared by the caller */ 8549 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 8550 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 8551 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 8552 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 8553 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 8554 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 8555 else 8556 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 8557 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 8558 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 8559 inc_rfc1001_len(tr_buf, orig_len); 8560 } 8561 8562 int smb3_encrypt_resp(struct ksmbd_work *work) 8563 { 8564 char *buf = work->response_buf; 8565 struct kvec iov[3]; 8566 int rc = -ENOMEM; 8567 int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0); 8568 8569 if (ARRAY_SIZE(iov) < rq_nvec) 8570 return -ENOMEM; 8571 8572 work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); 8573 if (!work->tr_buf) 8574 return rc; 8575 8576 /* fill transform header */ 8577 fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type); 8578 8579 iov[0].iov_base = work->tr_buf; 8580 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8581 buf_size += iov[0].iov_len - 4; 8582 8583 iov[1].iov_base = buf + 4; 8584 iov[1].iov_len = get_rfc1002_len(buf); 8585 if (work->aux_payload_sz) { 8586 iov[1].iov_len = work->resp_hdr_sz - 4; 8587 8588 iov[2].iov_base = work->aux_payload_buf; 8589 iov[2].iov_len = work->aux_payload_sz; 8590 buf_size += iov[2].iov_len; 8591 } 8592 buf_size += iov[1].iov_len; 8593 work->resp_hdr_sz = iov[1].iov_len; 8594 8595 rc = ksmbd_crypt_message(work, iov, rq_nvec, 1); 8596 if (rc) 8597 return rc; 8598 8599 memmove(buf, iov[1].iov_base, iov[1].iov_len); 8600 *(__be32 *)work->tr_buf = cpu_to_be32(buf_size); 8601 8602 return rc; 8603 } 8604 8605 bool smb3_is_transform_hdr(void *buf) 8606 { 8607 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); 8608 8609 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 8610 } 8611 8612 int smb3_decrypt_req(struct ksmbd_work *work) 8613 { 8614 struct ksmbd_session *sess; 8615 char *buf = work->request_buf; 8616 unsigned int pdu_length = get_rfc1002_len(buf); 8617 struct kvec iov[2]; 8618 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 8619 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); 8620 int rc = 0; 8621 8622 if (pdu_length < sizeof(struct smb2_transform_hdr) || 8623 buf_data_size < sizeof(struct smb2_hdr)) { 8624 pr_err("Transform message is too small (%u)\n", 8625 pdu_length); 8626 return -ECONNABORTED; 8627 } 8628 8629 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 8630 pr_err("Transform message is broken\n"); 8631 return -ECONNABORTED; 8632 } 8633 8634 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 8635 if (!sess) { 8636 pr_err("invalid session id(%llx) in transform header\n", 8637 le64_to_cpu(tr_hdr->SessionId)); 8638 return -ECONNABORTED; 8639 } 8640 8641 iov[0].iov_base = buf; 8642 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8643 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 8644 iov[1].iov_len = buf_data_size; 8645 rc = ksmbd_crypt_message(work, iov, 2, 0); 8646 if (rc) 8647 return rc; 8648 8649 memmove(buf + 4, iov[1].iov_base, buf_data_size); 8650 *(__be32 *)buf = cpu_to_be32(buf_data_size); 8651 8652 return rc; 8653 } 8654 8655 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 8656 { 8657 struct ksmbd_conn *conn = work->conn; 8658 struct ksmbd_session *sess = work->sess; 8659 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); 8660 8661 if (conn->dialect < SMB30_PROT_ID) 8662 return false; 8663 8664 if (work->next_smb2_rcv_hdr_off) 8665 rsp = ksmbd_resp_buf_next(work); 8666 8667 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 8668 sess->user && !user_guest(sess->user) && 8669 rsp->Status == STATUS_SUCCESS) 8670 return true; 8671 return false; 8672 } 8673