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