1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> 4 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 5 */ 6 7 #include <linux/inetdevice.h> 8 #include <net/addrconf.h> 9 #include <linux/syscalls.h> 10 #include <linux/namei.h> 11 #include <linux/statfs.h> 12 #include <linux/ethtool.h> 13 #include <linux/falloc.h> 14 #include <linux/mount.h> 15 #include <linux/filelock.h> 16 17 #include "glob.h" 18 #include "smbfsctl.h" 19 #include "oplock.h" 20 #include "smbacl.h" 21 22 #include "auth.h" 23 #include "asn1.h" 24 #include "connection.h" 25 #include "transport_ipc.h" 26 #include "../common/smbdirect/smbdirect.h" 27 #include "transport_rdma.h" 28 #include "vfs.h" 29 #include "vfs_cache.h" 30 #include "misc.h" 31 32 #include "server.h" 33 #include "smb_common.h" 34 #include "../common/smb2status.h" 35 #include "ksmbd_work.h" 36 #include "mgmt/user_config.h" 37 #include "mgmt/share_config.h" 38 #include "mgmt/tree_connect.h" 39 #include "mgmt/user_session.h" 40 #include "mgmt/ksmbd_ida.h" 41 #include "ndr.h" 42 #include "stats.h" 43 #include "transport_tcp.h" 44 45 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) 46 { 47 if (work->next_smb2_rcv_hdr_off) { 48 *req = ksmbd_req_buf_next(work); 49 *rsp = ksmbd_resp_buf_next(work); 50 } else { 51 *req = smb_get_msg(work->request_buf); 52 *rsp = smb_get_msg(work->response_buf); 53 } 54 } 55 56 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) 57 58 /** 59 * check_session_id() - check for valid session id in smb header 60 * @conn: connection instance 61 * @id: session id from smb header 62 * 63 * Return: 1 if valid session id, otherwise 0 64 */ 65 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) 66 { 67 struct ksmbd_session *sess; 68 69 if (id == 0 || id == -1) 70 return false; 71 72 sess = ksmbd_session_lookup_all(conn, id); 73 if (sess) { 74 ksmbd_user_session_put(sess); 75 return true; 76 } 77 pr_err("Invalid user session id: %llu\n", id); 78 return false; 79 } 80 81 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) 82 { 83 struct channel *chann; 84 85 down_read(&sess->chann_lock); 86 chann = xa_load(&sess->ksmbd_chann_list, (long)conn); 87 up_read(&sess->chann_lock); 88 89 return chann; 90 } 91 92 /** 93 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. 94 * @work: smb work 95 * 96 * Return: 0 if there is a tree connection matched or these are 97 * skipable commands, otherwise error 98 */ 99 int smb2_get_ksmbd_tcon(struct ksmbd_work *work) 100 { 101 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 102 unsigned int cmd = le16_to_cpu(req_hdr->Command); 103 unsigned int tree_id; 104 105 if (cmd == SMB2_TREE_CONNECT_HE || 106 cmd == SMB2_CANCEL_HE || 107 cmd == SMB2_LOGOFF_HE) { 108 ksmbd_debug(SMB, "skip to check tree connect request\n"); 109 return 0; 110 } 111 112 if (xa_empty(&work->sess->tree_conns)) { 113 ksmbd_debug(SMB, "NO tree connected\n"); 114 return -ENOENT; 115 } 116 117 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 118 119 /* 120 * If request is not the first in Compound request, 121 * Just validate tree id in header with work->tcon->id. 122 */ 123 if (work->next_smb2_rcv_hdr_off) { 124 if (!work->tcon) { 125 pr_err("The first operation in the compound does not have tcon\n"); 126 return -EINVAL; 127 } 128 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 129 pr_err("tree id(%u) is different with id(%u) in first operation\n", 130 tree_id, work->tcon->id); 131 return -EINVAL; 132 } 133 return 1; 134 } 135 136 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 137 if (!work->tcon) { 138 pr_err("Invalid tid %d\n", tree_id); 139 return -ENOENT; 140 } 141 142 return 1; 143 } 144 145 /** 146 * smb2_set_err_rsp() - set error response code on smb response 147 * @work: smb work containing response buffer 148 */ 149 void smb2_set_err_rsp(struct ksmbd_work *work) 150 { 151 struct smb2_err_rsp *err_rsp; 152 153 if (work->next_smb2_rcv_hdr_off) 154 err_rsp = ksmbd_resp_buf_next(work); 155 else 156 err_rsp = smb_get_msg(work->response_buf); 157 158 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 159 int err; 160 161 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 162 err_rsp->ErrorContextCount = 0; 163 err_rsp->Reserved = 0; 164 err_rsp->ByteCount = 0; 165 err_rsp->ErrorData[0] = 0; 166 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, 167 __SMB2_HEADER_STRUCTURE_SIZE + 168 SMB2_ERROR_STRUCTURE_SIZE2); 169 if (err) 170 work->send_no_response = 1; 171 } 172 } 173 174 /** 175 * is_smb2_neg_cmd() - is it smb2 negotiation command 176 * @work: smb work containing smb header 177 * 178 * Return: true if smb2 negotiation command, otherwise false 179 */ 180 bool is_smb2_neg_cmd(struct ksmbd_work *work) 181 { 182 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 183 184 /* is it SMB2 header ? */ 185 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 186 return false; 187 188 /* make sure it is request not response message */ 189 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 190 return false; 191 192 if (hdr->Command != SMB2_NEGOTIATE) 193 return false; 194 195 return true; 196 } 197 198 /** 199 * is_smb2_rsp() - is it smb2 response 200 * @work: smb work containing smb response buffer 201 * 202 * Return: true if smb2 response, otherwise false 203 */ 204 bool is_smb2_rsp(struct ksmbd_work *work) 205 { 206 struct smb2_hdr *hdr = smb_get_msg(work->response_buf); 207 208 /* is it SMB2 header ? */ 209 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 210 return false; 211 212 /* make sure it is response not request message */ 213 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 214 return false; 215 216 return true; 217 } 218 219 /** 220 * get_smb2_cmd_val() - get smb command code from smb header 221 * @work: smb work containing smb request buffer 222 * 223 * Return: smb2 request command value 224 */ 225 u16 get_smb2_cmd_val(struct ksmbd_work *work) 226 { 227 struct smb2_hdr *rcv_hdr; 228 229 if (work->next_smb2_rcv_hdr_off) 230 rcv_hdr = ksmbd_req_buf_next(work); 231 else 232 rcv_hdr = smb_get_msg(work->request_buf); 233 return le16_to_cpu(rcv_hdr->Command); 234 } 235 236 /** 237 * set_smb2_rsp_status() - set error response code on smb2 header 238 * @work: smb work containing response buffer 239 * @err: error response code 240 */ 241 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 242 { 243 struct smb2_hdr *rsp_hdr; 244 245 rsp_hdr = smb_get_msg(work->response_buf); 246 rsp_hdr->Status = err; 247 248 work->iov_idx = 0; 249 work->iov_cnt = 0; 250 work->next_smb2_rcv_hdr_off = 0; 251 smb2_set_err_rsp(work); 252 } 253 254 /** 255 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 256 * @work: smb work containing smb request buffer 257 * 258 * smb2 negotiate response is sent in reply of smb1 negotiate command for 259 * dialect auto-negotiation. 260 */ 261 int init_smb2_neg_rsp(struct ksmbd_work *work) 262 { 263 struct smb2_hdr *rsp_hdr; 264 struct smb2_negotiate_rsp *rsp; 265 struct ksmbd_conn *conn = work->conn; 266 int err; 267 268 rsp_hdr = smb_get_msg(work->response_buf); 269 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 270 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 271 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 272 rsp_hdr->CreditRequest = cpu_to_le16(2); 273 rsp_hdr->Command = SMB2_NEGOTIATE; 274 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 275 rsp_hdr->NextCommand = 0; 276 rsp_hdr->MessageId = 0; 277 rsp_hdr->Id.SyncId.ProcessId = 0; 278 rsp_hdr->Id.SyncId.TreeId = 0; 279 rsp_hdr->SessionId = 0; 280 memset(rsp_hdr->Signature, 0, 16); 281 282 rsp = smb_get_msg(work->response_buf); 283 284 WARN_ON(ksmbd_conn_good(conn)); 285 286 rsp->StructureSize = cpu_to_le16(65); 287 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 288 rsp->DialectRevision = cpu_to_le16(conn->dialect); 289 /* Not setting conn guid rsp->ServerGUID, as it 290 * not used by client for identifying connection 291 */ 292 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 293 /* Default Max Message Size till SMB2.0, 64K*/ 294 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 295 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 296 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 297 298 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 299 rsp->ServerStartTime = 0; 300 301 rsp->SecurityBufferOffset = cpu_to_le16(128); 302 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 303 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 304 le16_to_cpu(rsp->SecurityBufferOffset)); 305 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 306 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 307 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 308 err = ksmbd_iov_pin_rsp(work, rsp, 309 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); 310 if (err) 311 return err; 312 conn->use_spnego = true; 313 314 ksmbd_conn_set_need_negotiate(conn); 315 return 0; 316 } 317 318 /** 319 * smb2_set_rsp_credits() - set number of credits in response buffer 320 * @work: smb work containing smb response buffer 321 */ 322 int smb2_set_rsp_credits(struct ksmbd_work *work) 323 { 324 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 325 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 326 struct ksmbd_conn *conn = work->conn; 327 unsigned short credits_requested, aux_max; 328 unsigned short credit_charge, credits_granted = 0; 329 330 if (work->send_no_response) 331 return 0; 332 333 hdr->CreditCharge = req_hdr->CreditCharge; 334 335 if (conn->total_credits > conn->vals->max_credits) { 336 hdr->CreditRequest = 0; 337 pr_err("Total credits overflow: %d\n", conn->total_credits); 338 return -EINVAL; 339 } 340 341 credit_charge = max_t(unsigned short, 342 le16_to_cpu(req_hdr->CreditCharge), 1); 343 if (credit_charge > conn->total_credits) { 344 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 345 credit_charge, conn->total_credits); 346 return -EINVAL; 347 } 348 349 conn->total_credits -= credit_charge; 350 conn->outstanding_credits -= credit_charge; 351 credits_requested = max_t(unsigned short, 352 le16_to_cpu(req_hdr->CreditRequest), 1); 353 354 /* according to smb2.credits smbtorture, Windows server 355 * 2016 or later grant up to 8192 credits at once. 356 * 357 * TODO: Need to adjuct CreditRequest value according to 358 * current cpu load 359 */ 360 if (hdr->Command == SMB2_NEGOTIATE) 361 aux_max = 1; 362 else 363 aux_max = conn->vals->max_credits - conn->total_credits; 364 credits_granted = min_t(unsigned short, credits_requested, aux_max); 365 366 conn->total_credits += credits_granted; 367 work->credits_granted += credits_granted; 368 369 if (!req_hdr->NextCommand) { 370 /* Update CreditRequest in last request */ 371 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 372 } 373 ksmbd_debug(SMB, 374 "credits: requested[%d] granted[%d] total_granted[%d]\n", 375 credits_requested, credits_granted, 376 conn->total_credits); 377 return 0; 378 } 379 380 /** 381 * init_chained_smb2_rsp() - initialize smb2 chained response 382 * @work: smb work containing smb response buffer 383 */ 384 static void init_chained_smb2_rsp(struct ksmbd_work *work) 385 { 386 struct smb2_hdr *req = ksmbd_req_buf_next(work); 387 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 388 struct smb2_hdr *rsp_hdr; 389 struct smb2_hdr *rcv_hdr; 390 int next_hdr_offset = 0; 391 int len, new_len; 392 393 /* Len of this response = updated RFC len - offset of previous cmd 394 * in the compound rsp 395 */ 396 397 /* Storing the current local FID which may be needed by subsequent 398 * command in the compound request 399 */ 400 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 401 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 402 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 403 work->compound_sid = le64_to_cpu(rsp->SessionId); 404 } 405 406 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 407 next_hdr_offset = le32_to_cpu(req->NextCommand); 408 409 new_len = ALIGN(len, 8); 410 work->iov[work->iov_idx].iov_len += (new_len - len); 411 inc_rfc1001_len(work->response_buf, new_len - len); 412 rsp->NextCommand = cpu_to_le32(new_len); 413 414 work->next_smb2_rcv_hdr_off += next_hdr_offset; 415 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 416 work->next_smb2_rsp_hdr_off += new_len; 417 ksmbd_debug(SMB, 418 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 419 new_len, work->next_smb2_rcv_hdr_off, 420 work->next_smb2_rsp_hdr_off); 421 422 rsp_hdr = ksmbd_resp_buf_next(work); 423 rcv_hdr = ksmbd_req_buf_next(work); 424 425 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 426 ksmbd_debug(SMB, "related flag should be set\n"); 427 work->compound_fid = KSMBD_NO_FID; 428 work->compound_pfid = KSMBD_NO_FID; 429 } 430 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 431 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 432 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 433 rsp_hdr->Command = rcv_hdr->Command; 434 435 /* 436 * Message is response. We don't grant oplock yet. 437 */ 438 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 439 SMB2_FLAGS_RELATED_OPERATIONS); 440 rsp_hdr->NextCommand = 0; 441 rsp_hdr->MessageId = rcv_hdr->MessageId; 442 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 443 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 444 rsp_hdr->SessionId = rcv_hdr->SessionId; 445 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 446 } 447 448 /** 449 * is_chained_smb2_message() - check for chained command 450 * @work: smb work containing smb request buffer 451 * 452 * Return: true if chained request, otherwise false 453 */ 454 bool is_chained_smb2_message(struct ksmbd_work *work) 455 { 456 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 457 unsigned int len, next_cmd; 458 459 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 460 return false; 461 462 hdr = ksmbd_req_buf_next(work); 463 next_cmd = le32_to_cpu(hdr->NextCommand); 464 if (next_cmd > 0) { 465 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 466 __SMB2_HEADER_STRUCTURE_SIZE > 467 get_rfc1002_len(work->request_buf)) { 468 pr_err("next command(%u) offset exceeds smb msg size\n", 469 next_cmd); 470 return false; 471 } 472 473 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 474 work->response_sz) { 475 pr_err("next response offset exceeds response buffer size\n"); 476 return false; 477 } 478 479 ksmbd_debug(SMB, "got SMB2 chained command\n"); 480 init_chained_smb2_rsp(work); 481 return true; 482 } else if (work->next_smb2_rcv_hdr_off) { 483 /* 484 * This is last request in chained command, 485 * align response to 8 byte 486 */ 487 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 488 len = len - get_rfc1002_len(work->response_buf); 489 if (len) { 490 ksmbd_debug(SMB, "padding len %u\n", len); 491 work->iov[work->iov_idx].iov_len += len; 492 inc_rfc1001_len(work->response_buf, len); 493 } 494 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 495 } 496 return false; 497 } 498 499 /** 500 * init_smb2_rsp_hdr() - initialize smb2 response 501 * @work: smb work containing smb request buffer 502 * 503 * Return: 0 504 */ 505 int init_smb2_rsp_hdr(struct ksmbd_work *work) 506 { 507 struct smb2_hdr *rsp_hdr = smb_get_msg(work->response_buf); 508 struct smb2_hdr *rcv_hdr = smb_get_msg(work->request_buf); 509 510 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 511 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 512 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 513 rsp_hdr->Command = rcv_hdr->Command; 514 515 /* 516 * Message is response. We don't grant oplock yet. 517 */ 518 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 519 rsp_hdr->NextCommand = 0; 520 rsp_hdr->MessageId = rcv_hdr->MessageId; 521 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 522 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 523 rsp_hdr->SessionId = rcv_hdr->SessionId; 524 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 525 526 return 0; 527 } 528 529 /** 530 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 531 * @work: smb work containing smb request buffer 532 * 533 * Return: 0 on success, otherwise error 534 */ 535 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 536 { 537 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 538 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 539 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 540 size_t sz = small_sz; 541 int cmd = le16_to_cpu(hdr->Command); 542 543 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 544 sz = large_sz; 545 546 if (cmd == SMB2_QUERY_INFO_HE) { 547 struct smb2_query_info_req *req; 548 549 if (get_rfc1002_len(work->request_buf) < 550 offsetof(struct smb2_query_info_req, OutputBufferLength)) 551 return -EINVAL; 552 553 req = smb_get_msg(work->request_buf); 554 if ((req->InfoType == SMB2_O_INFO_FILE && 555 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 556 req->FileInfoClass == FILE_ALL_INFORMATION)) || 557 req->InfoType == SMB2_O_INFO_SECURITY) 558 sz = large_sz; 559 } 560 561 /* allocate large response buf for chained commands */ 562 if (le32_to_cpu(hdr->NextCommand) > 0) 563 sz = large_sz; 564 565 work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP); 566 if (!work->response_buf) 567 return -ENOMEM; 568 569 work->response_sz = sz; 570 return 0; 571 } 572 573 /** 574 * smb2_check_user_session() - check for valid session for a user 575 * @work: smb work containing smb request buffer 576 * 577 * Return: 0 on success, otherwise error 578 */ 579 int smb2_check_user_session(struct ksmbd_work *work) 580 { 581 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 582 struct ksmbd_conn *conn = work->conn; 583 unsigned int cmd = le16_to_cpu(req_hdr->Command); 584 unsigned long long sess_id; 585 586 /* 587 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 588 * require a session id, so no need to validate user session's for 589 * these commands. 590 */ 591 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 592 cmd == SMB2_SESSION_SETUP_HE) 593 return 0; 594 595 if (!ksmbd_conn_good(conn)) 596 return -EIO; 597 598 sess_id = le64_to_cpu(req_hdr->SessionId); 599 600 /* 601 * If request is not the first in Compound request, 602 * Just validate session id in header with work->sess->id. 603 */ 604 if (work->next_smb2_rcv_hdr_off) { 605 if (!work->sess) { 606 pr_err("The first operation in the compound does not have sess\n"); 607 return -EINVAL; 608 } 609 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 610 pr_err("session id(%llu) is different with the first operation(%lld)\n", 611 sess_id, work->sess->id); 612 return -EINVAL; 613 } 614 return 1; 615 } 616 617 /* Check for validity of user session */ 618 work->sess = ksmbd_session_lookup_all(conn, sess_id); 619 if (work->sess) 620 return 1; 621 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 622 return -ENOENT; 623 } 624 625 /** 626 * smb2_get_name() - get filename string from on the wire smb format 627 * @src: source buffer 628 * @maxlen: maxlen of source string 629 * @local_nls: nls_table pointer 630 * 631 * Return: matching converted filename on success, otherwise error ptr 632 */ 633 static char * 634 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 635 { 636 char *name; 637 638 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 639 if (IS_ERR(name)) { 640 pr_err("failed to get name %ld\n", PTR_ERR(name)); 641 return name; 642 } 643 644 if (*name == '\0') { 645 kfree(name); 646 return ERR_PTR(-EINVAL); 647 } 648 649 if (*name == '\\') { 650 pr_err("not allow directory name included leading slash\n"); 651 kfree(name); 652 return ERR_PTR(-EINVAL); 653 } 654 655 ksmbd_conv_path_to_unix(name); 656 ksmbd_strip_last_slash(name); 657 return name; 658 } 659 660 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 661 { 662 struct ksmbd_conn *conn = work->conn; 663 int id; 664 665 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 666 if (id < 0) { 667 pr_err("Failed to alloc async message id\n"); 668 return id; 669 } 670 work->asynchronous = true; 671 work->async_id = id; 672 673 ksmbd_debug(SMB, 674 "Send interim Response to inform async request id : %d\n", 675 work->async_id); 676 677 work->cancel_fn = fn; 678 work->cancel_argv = arg; 679 680 if (list_empty(&work->async_request_entry)) { 681 spin_lock(&conn->request_lock); 682 list_add_tail(&work->async_request_entry, &conn->async_requests); 683 spin_unlock(&conn->request_lock); 684 } 685 686 return 0; 687 } 688 689 void release_async_work(struct ksmbd_work *work) 690 { 691 struct ksmbd_conn *conn = work->conn; 692 693 spin_lock(&conn->request_lock); 694 list_del_init(&work->async_request_entry); 695 spin_unlock(&conn->request_lock); 696 697 work->asynchronous = 0; 698 work->cancel_fn = NULL; 699 kfree(work->cancel_argv); 700 work->cancel_argv = NULL; 701 if (work->async_id) { 702 ksmbd_release_id(&conn->async_ida, work->async_id); 703 work->async_id = 0; 704 } 705 } 706 707 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 708 { 709 struct smb2_hdr *rsp_hdr; 710 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 711 712 if (!in_work) 713 return; 714 715 if (allocate_interim_rsp_buf(in_work)) { 716 pr_err("smb_allocate_rsp_buf failed!\n"); 717 ksmbd_free_work_struct(in_work); 718 return; 719 } 720 721 in_work->conn = work->conn; 722 memcpy(smb_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 723 __SMB2_HEADER_STRUCTURE_SIZE); 724 725 rsp_hdr = smb_get_msg(in_work->response_buf); 726 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 727 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); 728 smb2_set_err_rsp(in_work); 729 rsp_hdr->Status = status; 730 731 ksmbd_conn_write(in_work); 732 ksmbd_free_work_struct(in_work); 733 } 734 735 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 736 { 737 if (S_ISDIR(mode) || S_ISREG(mode)) 738 return 0; 739 740 if (S_ISLNK(mode)) 741 return IO_REPARSE_TAG_LX_SYMLINK_LE; 742 else if (S_ISFIFO(mode)) 743 return IO_REPARSE_TAG_LX_FIFO_LE; 744 else if (S_ISSOCK(mode)) 745 return IO_REPARSE_TAG_AF_UNIX_LE; 746 else if (S_ISCHR(mode)) 747 return IO_REPARSE_TAG_LX_CHR_LE; 748 else if (S_ISBLK(mode)) 749 return IO_REPARSE_TAG_LX_BLK_LE; 750 751 return 0; 752 } 753 754 /** 755 * smb2_get_dos_mode() - get file mode in dos format from unix mode 756 * @stat: kstat containing file mode 757 * @attribute: attribute flags 758 * 759 * Return: converted dos mode 760 */ 761 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 762 { 763 int attr = 0; 764 765 if (S_ISDIR(stat->mode)) { 766 attr = FILE_ATTRIBUTE_DIRECTORY | 767 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 768 } else { 769 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 770 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 771 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 772 FILE_SUPPORTS_SPARSE_FILES)) 773 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 774 775 if (smb2_get_reparse_tag_special_file(stat->mode)) 776 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 777 } 778 779 return attr; 780 } 781 782 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 783 __le16 hash_id) 784 { 785 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 786 pneg_ctxt->DataLength = cpu_to_le16(38); 787 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 788 pneg_ctxt->Reserved = cpu_to_le32(0); 789 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 790 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 791 pneg_ctxt->HashAlgorithms = hash_id; 792 } 793 794 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 795 __le16 cipher_type) 796 { 797 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 798 pneg_ctxt->DataLength = cpu_to_le16(4); 799 pneg_ctxt->Reserved = cpu_to_le32(0); 800 pneg_ctxt->CipherCount = cpu_to_le16(1); 801 pneg_ctxt->Ciphers[0] = cipher_type; 802 } 803 804 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 805 __le16 sign_algo) 806 { 807 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 808 pneg_ctxt->DataLength = 809 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 810 - sizeof(struct smb2_neg_context)); 811 pneg_ctxt->Reserved = cpu_to_le32(0); 812 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 813 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 814 } 815 816 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 817 { 818 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 819 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 820 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 821 pneg_ctxt->Name[0] = 0x93; 822 pneg_ctxt->Name[1] = 0xAD; 823 pneg_ctxt->Name[2] = 0x25; 824 pneg_ctxt->Name[3] = 0x50; 825 pneg_ctxt->Name[4] = 0x9C; 826 pneg_ctxt->Name[5] = 0xB4; 827 pneg_ctxt->Name[6] = 0x11; 828 pneg_ctxt->Name[7] = 0xE7; 829 pneg_ctxt->Name[8] = 0xB4; 830 pneg_ctxt->Name[9] = 0x23; 831 pneg_ctxt->Name[10] = 0x83; 832 pneg_ctxt->Name[11] = 0xDE; 833 pneg_ctxt->Name[12] = 0x96; 834 pneg_ctxt->Name[13] = 0x8B; 835 pneg_ctxt->Name[14] = 0xCD; 836 pneg_ctxt->Name[15] = 0x7C; 837 } 838 839 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 840 struct smb2_negotiate_rsp *rsp) 841 { 842 char * const pneg_ctxt = (char *)rsp + 843 le32_to_cpu(rsp->NegotiateContextOffset); 844 int neg_ctxt_cnt = 1; 845 int ctxt_size; 846 847 ksmbd_debug(SMB, 848 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 849 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 850 conn->preauth_info->Preauth_HashId); 851 ctxt_size = sizeof(struct smb2_preauth_neg_context); 852 853 if (conn->cipher_type) { 854 /* Round to 8 byte boundary */ 855 ctxt_size = round_up(ctxt_size, 8); 856 ksmbd_debug(SMB, 857 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 858 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 859 (pneg_ctxt + ctxt_size), 860 conn->cipher_type); 861 neg_ctxt_cnt++; 862 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 863 } 864 865 /* compression context not yet supported */ 866 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 867 868 if (conn->posix_ext_supported) { 869 ctxt_size = round_up(ctxt_size, 8); 870 ksmbd_debug(SMB, 871 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 872 build_posix_ctxt((struct smb2_posix_neg_context *) 873 (pneg_ctxt + ctxt_size)); 874 neg_ctxt_cnt++; 875 ctxt_size += sizeof(struct smb2_posix_neg_context); 876 } 877 878 if (conn->signing_negotiated) { 879 ctxt_size = round_up(ctxt_size, 8); 880 ksmbd_debug(SMB, 881 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 882 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 883 (pneg_ctxt + ctxt_size), 884 conn->signing_algorithm); 885 neg_ctxt_cnt++; 886 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 887 } 888 889 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 890 return ctxt_size + AUTH_GSS_PADDING; 891 } 892 893 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 894 struct smb2_preauth_neg_context *pneg_ctxt, 895 int ctxt_len) 896 { 897 /* 898 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 899 * which may not be present. Only check for used HashAlgorithms[1]. 900 */ 901 if (ctxt_len < 902 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 903 return STATUS_INVALID_PARAMETER; 904 905 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 906 return STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 907 908 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 909 return STATUS_SUCCESS; 910 } 911 912 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 913 struct smb2_encryption_neg_context *pneg_ctxt, 914 int ctxt_len) 915 { 916 int cph_cnt; 917 int i, cphs_size; 918 919 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 920 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 921 return; 922 } 923 924 conn->cipher_type = 0; 925 926 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 927 cphs_size = cph_cnt * sizeof(__le16); 928 929 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 930 ctxt_len) { 931 pr_err("Invalid cipher count(%d)\n", cph_cnt); 932 return; 933 } 934 935 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 936 return; 937 938 for (i = 0; i < cph_cnt; i++) { 939 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 940 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 941 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 942 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 943 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 944 pneg_ctxt->Ciphers[i]); 945 conn->cipher_type = pneg_ctxt->Ciphers[i]; 946 break; 947 } 948 } 949 } 950 951 /** 952 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 953 * @conn: smb connection 954 * 955 * Return: true if connection should be encrypted, else false 956 */ 957 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 958 { 959 if (!conn->ops->generate_encryptionkey) 960 return false; 961 962 /* 963 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 964 * SMB 3.1.1 uses the cipher_type field. 965 */ 966 return (conn->vals->req_capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 967 conn->cipher_type; 968 } 969 970 static void decode_compress_ctxt(struct ksmbd_conn *conn, 971 struct smb2_compression_capabilities_context *pneg_ctxt) 972 { 973 conn->compress_algorithm = SMB3_COMPRESS_NONE; 974 } 975 976 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 977 struct smb2_signing_capabilities *pneg_ctxt, 978 int ctxt_len) 979 { 980 int sign_algo_cnt; 981 int i, sign_alos_size; 982 983 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 984 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 985 return; 986 } 987 988 conn->signing_negotiated = false; 989 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 990 sign_alos_size = sign_algo_cnt * sizeof(__le16); 991 992 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 993 ctxt_len) { 994 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 995 return; 996 } 997 998 for (i = 0; i < sign_algo_cnt; i++) { 999 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 1000 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 1001 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 1002 pneg_ctxt->SigningAlgorithms[i]); 1003 conn->signing_negotiated = true; 1004 conn->signing_algorithm = 1005 pneg_ctxt->SigningAlgorithms[i]; 1006 break; 1007 } 1008 } 1009 } 1010 1011 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 1012 struct smb2_negotiate_req *req, 1013 unsigned int len_of_smb) 1014 { 1015 /* +4 is to account for the RFC1001 len field */ 1016 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1017 int i = 0, len_of_ctxts; 1018 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1019 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1020 __le32 status = STATUS_INVALID_PARAMETER; 1021 1022 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1023 if (len_of_smb <= offset) { 1024 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1025 return status; 1026 } 1027 1028 len_of_ctxts = len_of_smb - offset; 1029 1030 while (i++ < neg_ctxt_cnt) { 1031 int clen, ctxt_len; 1032 1033 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1034 break; 1035 1036 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1037 clen = le16_to_cpu(pctx->DataLength); 1038 ctxt_len = clen + sizeof(struct smb2_neg_context); 1039 1040 if (ctxt_len > len_of_ctxts) 1041 break; 1042 1043 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1044 ksmbd_debug(SMB, 1045 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1046 if (conn->preauth_info->Preauth_HashId) 1047 break; 1048 1049 status = decode_preauth_ctxt(conn, 1050 (struct smb2_preauth_neg_context *)pctx, 1051 ctxt_len); 1052 if (status != STATUS_SUCCESS) 1053 break; 1054 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1055 ksmbd_debug(SMB, 1056 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1057 if (conn->cipher_type) 1058 break; 1059 1060 decode_encrypt_ctxt(conn, 1061 (struct smb2_encryption_neg_context *)pctx, 1062 ctxt_len); 1063 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1064 ksmbd_debug(SMB, 1065 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1066 if (conn->compress_algorithm) 1067 break; 1068 1069 decode_compress_ctxt(conn, 1070 (struct smb2_compression_capabilities_context *)pctx); 1071 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1072 ksmbd_debug(SMB, 1073 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1074 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1075 ksmbd_debug(SMB, 1076 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1077 conn->posix_ext_supported = true; 1078 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1079 ksmbd_debug(SMB, 1080 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1081 1082 decode_sign_cap_ctxt(conn, 1083 (struct smb2_signing_capabilities *)pctx, 1084 ctxt_len); 1085 } 1086 1087 /* offsets must be 8 byte aligned */ 1088 offset = (ctxt_len + 7) & ~0x7; 1089 len_of_ctxts -= offset; 1090 } 1091 return status; 1092 } 1093 1094 /** 1095 * smb2_handle_negotiate() - handler for smb2 negotiate command 1096 * @work: smb work containing smb request buffer 1097 * 1098 * Return: 0 1099 */ 1100 int smb2_handle_negotiate(struct ksmbd_work *work) 1101 { 1102 struct ksmbd_conn *conn = work->conn; 1103 struct smb2_negotiate_req *req = smb_get_msg(work->request_buf); 1104 struct smb2_negotiate_rsp *rsp = smb_get_msg(work->response_buf); 1105 int rc = 0; 1106 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1107 __le32 status; 1108 1109 ksmbd_debug(SMB, "Received negotiate request\n"); 1110 conn->need_neg = false; 1111 if (ksmbd_conn_good(conn)) { 1112 pr_err("conn->tcp_status is already in CifsGood State\n"); 1113 work->send_no_response = 1; 1114 return rc; 1115 } 1116 1117 ksmbd_conn_lock(conn); 1118 smb2_buf_len = get_rfc1002_len(work->request_buf); 1119 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1120 if (smb2_neg_size > smb2_buf_len) { 1121 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1122 rc = -EINVAL; 1123 goto err_out; 1124 } 1125 1126 if (req->DialectCount == 0) { 1127 pr_err("malformed packet\n"); 1128 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1129 rc = -EINVAL; 1130 goto err_out; 1131 } 1132 1133 if (conn->dialect == SMB311_PROT_ID) { 1134 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1135 1136 if (smb2_buf_len < nego_ctxt_off) { 1137 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1138 rc = -EINVAL; 1139 goto err_out; 1140 } 1141 1142 if (smb2_neg_size > nego_ctxt_off) { 1143 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1144 rc = -EINVAL; 1145 goto err_out; 1146 } 1147 1148 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1149 nego_ctxt_off) { 1150 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1151 rc = -EINVAL; 1152 goto err_out; 1153 } 1154 } else { 1155 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1156 smb2_buf_len) { 1157 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1158 rc = -EINVAL; 1159 goto err_out; 1160 } 1161 } 1162 1163 conn->cli_cap = le32_to_cpu(req->Capabilities); 1164 switch (conn->dialect) { 1165 case SMB311_PROT_ID: 1166 conn->preauth_info = 1167 kzalloc(sizeof(struct preauth_integrity_info), 1168 KSMBD_DEFAULT_GFP); 1169 if (!conn->preauth_info) { 1170 rc = -ENOMEM; 1171 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1172 goto err_out; 1173 } 1174 1175 status = deassemble_neg_contexts(conn, req, 1176 get_rfc1002_len(work->request_buf)); 1177 if (status != STATUS_SUCCESS) { 1178 pr_err("deassemble_neg_contexts error(0x%x)\n", 1179 status); 1180 rsp->hdr.Status = status; 1181 rc = -EINVAL; 1182 kfree(conn->preauth_info); 1183 conn->preauth_info = NULL; 1184 goto err_out; 1185 } 1186 1187 rc = init_smb3_11_server(conn); 1188 if (rc < 0) { 1189 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1190 kfree(conn->preauth_info); 1191 conn->preauth_info = NULL; 1192 goto err_out; 1193 } 1194 1195 ksmbd_gen_preauth_integrity_hash(conn, 1196 work->request_buf, 1197 conn->preauth_info->Preauth_HashValue); 1198 rsp->NegotiateContextOffset = 1199 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1200 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1201 break; 1202 case SMB302_PROT_ID: 1203 init_smb3_02_server(conn); 1204 break; 1205 case SMB30_PROT_ID: 1206 init_smb3_0_server(conn); 1207 break; 1208 case SMB21_PROT_ID: 1209 init_smb2_1_server(conn); 1210 break; 1211 case SMB2X_PROT_ID: 1212 case BAD_PROT_ID: 1213 default: 1214 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1215 conn->dialect); 1216 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1217 rc = -EINVAL; 1218 goto err_out; 1219 } 1220 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 1221 1222 /* For stats */ 1223 conn->connection_type = conn->dialect; 1224 1225 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1226 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1227 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1228 1229 memcpy(conn->ClientGUID, req->ClientGUID, 1230 SMB2_CLIENT_GUID_SIZE); 1231 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1232 1233 rsp->StructureSize = cpu_to_le16(65); 1234 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1235 /* Not setting conn guid rsp->ServerGUID, as it 1236 * not used by client for identifying server 1237 */ 1238 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1239 1240 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1241 rsp->ServerStartTime = 0; 1242 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1243 le32_to_cpu(rsp->NegotiateContextOffset), 1244 le16_to_cpu(rsp->NegotiateContextCount)); 1245 1246 rsp->SecurityBufferOffset = cpu_to_le16(128); 1247 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1248 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1249 le16_to_cpu(rsp->SecurityBufferOffset)); 1250 1251 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1252 conn->use_spnego = true; 1253 1254 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1255 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1256 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1257 conn->sign = true; 1258 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1259 server_conf.enforced_signing = true; 1260 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1261 conn->sign = true; 1262 } 1263 1264 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1265 ksmbd_conn_set_need_setup(conn); 1266 1267 err_out: 1268 ksmbd_conn_unlock(conn); 1269 if (rc) 1270 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1271 1272 if (!rc) 1273 rc = ksmbd_iov_pin_rsp(work, rsp, 1274 sizeof(struct smb2_negotiate_rsp) + 1275 AUTH_GSS_LENGTH + neg_ctxt_len); 1276 if (rc < 0) 1277 smb2_set_err_rsp(work); 1278 return rc; 1279 } 1280 1281 static int alloc_preauth_hash(struct ksmbd_session *sess, 1282 struct ksmbd_conn *conn) 1283 { 1284 if (sess->Preauth_HashValue) 1285 return 0; 1286 1287 if (!conn->preauth_info) 1288 return -ENOMEM; 1289 1290 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1291 PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP); 1292 if (!sess->Preauth_HashValue) 1293 return -ENOMEM; 1294 1295 return 0; 1296 } 1297 1298 static int generate_preauth_hash(struct ksmbd_work *work) 1299 { 1300 struct ksmbd_conn *conn = work->conn; 1301 struct ksmbd_session *sess = work->sess; 1302 u8 *preauth_hash; 1303 1304 if (conn->dialect != SMB311_PROT_ID) 1305 return 0; 1306 1307 if (conn->binding) { 1308 struct preauth_session *preauth_sess; 1309 1310 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1311 if (!preauth_sess) { 1312 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1313 if (!preauth_sess) 1314 return -ENOMEM; 1315 } 1316 1317 preauth_hash = preauth_sess->Preauth_HashValue; 1318 } else { 1319 if (!sess->Preauth_HashValue) 1320 if (alloc_preauth_hash(sess, conn)) 1321 return -ENOMEM; 1322 preauth_hash = sess->Preauth_HashValue; 1323 } 1324 1325 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1326 return 0; 1327 } 1328 1329 static int decode_negotiation_token(struct ksmbd_conn *conn, 1330 struct negotiate_message *negblob, 1331 size_t sz) 1332 { 1333 if (!conn->use_spnego) 1334 return -EINVAL; 1335 1336 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1337 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1338 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1339 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1340 conn->use_spnego = false; 1341 } 1342 } 1343 return 0; 1344 } 1345 1346 static int ntlm_negotiate(struct ksmbd_work *work, 1347 struct negotiate_message *negblob, 1348 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1349 { 1350 struct challenge_message *chgblob; 1351 unsigned char *spnego_blob = NULL; 1352 u16 spnego_blob_len; 1353 char *neg_blob; 1354 int sz, rc; 1355 1356 ksmbd_debug(SMB, "negotiate phase\n"); 1357 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1358 if (rc) 1359 return rc; 1360 1361 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1362 chgblob = (struct challenge_message *)rsp->Buffer; 1363 memset(chgblob, 0, sizeof(struct challenge_message)); 1364 1365 if (!work->conn->use_spnego) { 1366 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1367 if (sz < 0) 1368 return -ENOMEM; 1369 1370 rsp->SecurityBufferLength = cpu_to_le16(sz); 1371 return 0; 1372 } 1373 1374 sz = sizeof(struct challenge_message); 1375 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1376 1377 neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP); 1378 if (!neg_blob) 1379 return -ENOMEM; 1380 1381 chgblob = (struct challenge_message *)neg_blob; 1382 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1383 if (sz < 0) { 1384 rc = -ENOMEM; 1385 goto out; 1386 } 1387 1388 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1389 neg_blob, sz); 1390 if (rc) { 1391 rc = -ENOMEM; 1392 goto out; 1393 } 1394 1395 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1396 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1397 1398 out: 1399 kfree(spnego_blob); 1400 kfree(neg_blob); 1401 return rc; 1402 } 1403 1404 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1405 struct smb2_sess_setup_req *req) 1406 { 1407 int sz; 1408 1409 if (conn->use_spnego && conn->mechToken) 1410 return (struct authenticate_message *)conn->mechToken; 1411 1412 sz = le16_to_cpu(req->SecurityBufferOffset); 1413 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1414 + sz); 1415 } 1416 1417 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1418 struct smb2_sess_setup_req *req) 1419 { 1420 struct authenticate_message *authblob; 1421 struct ksmbd_user *user; 1422 char *name; 1423 unsigned int name_off, name_len, secbuf_len; 1424 1425 if (conn->use_spnego && conn->mechToken) 1426 secbuf_len = conn->mechTokenLen; 1427 else 1428 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1429 if (secbuf_len < sizeof(struct authenticate_message)) { 1430 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1431 return NULL; 1432 } 1433 authblob = user_authblob(conn, req); 1434 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1435 name_len = le16_to_cpu(authblob->UserName.Length); 1436 1437 if (secbuf_len < (u64)name_off + name_len) 1438 return NULL; 1439 1440 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1441 name_len, 1442 true, 1443 conn->local_nls); 1444 if (IS_ERR(name)) { 1445 pr_err("cannot allocate memory\n"); 1446 return NULL; 1447 } 1448 1449 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1450 user = ksmbd_login_user(name); 1451 kfree(name); 1452 return user; 1453 } 1454 1455 static int ntlm_authenticate(struct ksmbd_work *work, 1456 struct smb2_sess_setup_req *req, 1457 struct smb2_sess_setup_rsp *rsp) 1458 { 1459 struct ksmbd_conn *conn = work->conn; 1460 struct ksmbd_session *sess = work->sess; 1461 struct channel *chann = NULL, *old; 1462 struct ksmbd_user *user; 1463 u64 prev_id; 1464 int sz, rc; 1465 1466 ksmbd_debug(SMB, "authenticate phase\n"); 1467 if (conn->use_spnego) { 1468 unsigned char *spnego_blob; 1469 u16 spnego_blob_len; 1470 1471 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1472 &spnego_blob_len, 1473 0); 1474 if (rc) 1475 return -ENOMEM; 1476 1477 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1478 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1479 kfree(spnego_blob); 1480 } 1481 1482 user = session_user(conn, req); 1483 if (!user) { 1484 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1485 return -EPERM; 1486 } 1487 1488 /* Check for previous session */ 1489 prev_id = le64_to_cpu(req->PreviousSessionId); 1490 if (prev_id && prev_id != sess->id) 1491 destroy_previous_session(conn, user, prev_id); 1492 1493 if (sess->state == SMB2_SESSION_VALID) { 1494 /* 1495 * Reuse session if anonymous try to connect 1496 * on reauthetication. 1497 */ 1498 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1499 ksmbd_free_user(user); 1500 return 0; 1501 } 1502 1503 if (!ksmbd_compare_user(sess->user, user)) { 1504 ksmbd_free_user(user); 1505 return -EPERM; 1506 } 1507 ksmbd_free_user(user); 1508 } else { 1509 sess->user = user; 1510 } 1511 1512 if (conn->binding == false && user_guest(sess->user)) { 1513 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1514 } else { 1515 struct authenticate_message *authblob; 1516 1517 authblob = user_authblob(conn, req); 1518 if (conn->use_spnego && conn->mechToken) 1519 sz = conn->mechTokenLen; 1520 else 1521 sz = le16_to_cpu(req->SecurityBufferLength); 1522 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1523 if (rc) { 1524 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1525 ksmbd_debug(SMB, "authentication failed\n"); 1526 return -EPERM; 1527 } 1528 } 1529 1530 /* 1531 * If session state is SMB2_SESSION_VALID, We can assume 1532 * that it is reauthentication. And the user/password 1533 * has been verified, so return it here. 1534 */ 1535 if (sess->state == SMB2_SESSION_VALID) { 1536 if (conn->binding) 1537 goto binding_session; 1538 return 0; 1539 } 1540 1541 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1542 (conn->sign || server_conf.enforced_signing)) || 1543 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1544 sess->sign = true; 1545 1546 if (smb3_encryption_negotiated(conn) && 1547 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1548 conn->ops->generate_encryptionkey(conn, sess); 1549 sess->enc = true; 1550 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1551 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1552 /* 1553 * signing is disable if encryption is enable 1554 * on this session 1555 */ 1556 sess->sign = false; 1557 } 1558 1559 binding_session: 1560 if (conn->dialect >= SMB30_PROT_ID) { 1561 chann = lookup_chann_list(sess, conn); 1562 if (!chann) { 1563 chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP); 1564 if (!chann) 1565 return -ENOMEM; 1566 1567 chann->conn = conn; 1568 down_write(&sess->chann_lock); 1569 old = xa_store(&sess->ksmbd_chann_list, (long)conn, chann, 1570 KSMBD_DEFAULT_GFP); 1571 up_write(&sess->chann_lock); 1572 if (xa_is_err(old)) { 1573 kfree(chann); 1574 return xa_err(old); 1575 } 1576 } 1577 } 1578 1579 if (conn->ops->generate_signingkey) { 1580 rc = conn->ops->generate_signingkey(sess, conn); 1581 if (rc) { 1582 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1583 return -EINVAL; 1584 } 1585 } 1586 1587 if (!ksmbd_conn_lookup_dialect(conn)) { 1588 pr_err("fail to verify the dialect\n"); 1589 return -ENOENT; 1590 } 1591 return 0; 1592 } 1593 1594 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1595 static int krb5_authenticate(struct ksmbd_work *work, 1596 struct smb2_sess_setup_req *req, 1597 struct smb2_sess_setup_rsp *rsp) 1598 { 1599 struct ksmbd_conn *conn = work->conn; 1600 struct ksmbd_session *sess = work->sess; 1601 char *in_blob, *out_blob; 1602 struct channel *chann = NULL, *old; 1603 u64 prev_sess_id; 1604 int in_len, out_len; 1605 int retval; 1606 1607 in_blob = (char *)&req->hdr.ProtocolId + 1608 le16_to_cpu(req->SecurityBufferOffset); 1609 in_len = le16_to_cpu(req->SecurityBufferLength); 1610 out_blob = (char *)&rsp->hdr.ProtocolId + 1611 le16_to_cpu(rsp->SecurityBufferOffset); 1612 out_len = work->response_sz - 1613 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1614 1615 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1616 out_blob, &out_len); 1617 if (retval) { 1618 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1619 return -EINVAL; 1620 } 1621 1622 /* Check previous session */ 1623 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1624 if (prev_sess_id && prev_sess_id != sess->id) 1625 destroy_previous_session(conn, sess->user, prev_sess_id); 1626 1627 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1628 1629 /* 1630 * If session state is SMB2_SESSION_VALID, We can assume 1631 * that it is reauthentication. And the user/password 1632 * has been verified, so return it here. 1633 */ 1634 if (sess->state == SMB2_SESSION_VALID) { 1635 if (conn->binding) 1636 goto binding_session; 1637 return 0; 1638 } 1639 1640 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1641 (conn->sign || server_conf.enforced_signing)) || 1642 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1643 sess->sign = true; 1644 1645 if (smb3_encryption_negotiated(conn) && 1646 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1647 conn->ops->generate_encryptionkey(conn, sess); 1648 sess->enc = true; 1649 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1650 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1651 sess->sign = false; 1652 } 1653 1654 binding_session: 1655 if (conn->dialect >= SMB30_PROT_ID) { 1656 chann = lookup_chann_list(sess, conn); 1657 if (!chann) { 1658 chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP); 1659 if (!chann) 1660 return -ENOMEM; 1661 1662 chann->conn = conn; 1663 down_write(&sess->chann_lock); 1664 old = xa_store(&sess->ksmbd_chann_list, (long)conn, 1665 chann, KSMBD_DEFAULT_GFP); 1666 up_write(&sess->chann_lock); 1667 if (xa_is_err(old)) { 1668 kfree(chann); 1669 return xa_err(old); 1670 } 1671 } 1672 } 1673 1674 if (conn->ops->generate_signingkey) { 1675 retval = conn->ops->generate_signingkey(sess, conn); 1676 if (retval) { 1677 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1678 return -EINVAL; 1679 } 1680 } 1681 1682 if (!ksmbd_conn_lookup_dialect(conn)) { 1683 pr_err("fail to verify the dialect\n"); 1684 return -ENOENT; 1685 } 1686 return 0; 1687 } 1688 #else 1689 static int krb5_authenticate(struct ksmbd_work *work, 1690 struct smb2_sess_setup_req *req, 1691 struct smb2_sess_setup_rsp *rsp) 1692 { 1693 return -EOPNOTSUPP; 1694 } 1695 #endif 1696 1697 int smb2_sess_setup(struct ksmbd_work *work) 1698 { 1699 struct ksmbd_conn *conn = work->conn; 1700 struct smb2_sess_setup_req *req; 1701 struct smb2_sess_setup_rsp *rsp; 1702 struct ksmbd_session *sess; 1703 struct negotiate_message *negblob; 1704 unsigned int negblob_len, negblob_off; 1705 int rc = 0; 1706 1707 ksmbd_debug(SMB, "Received smb2 session setup request\n"); 1708 1709 if (!ksmbd_conn_need_setup(conn) && !ksmbd_conn_good(conn)) { 1710 work->send_no_response = 1; 1711 return rc; 1712 } 1713 1714 WORK_BUFFERS(work, req, rsp); 1715 1716 rsp->StructureSize = cpu_to_le16(9); 1717 rsp->SessionFlags = 0; 1718 rsp->SecurityBufferOffset = cpu_to_le16(72); 1719 rsp->SecurityBufferLength = 0; 1720 1721 ksmbd_conn_lock(conn); 1722 if (!req->hdr.SessionId) { 1723 sess = ksmbd_smb2_session_create(); 1724 if (!sess) { 1725 rc = -ENOMEM; 1726 goto out_err; 1727 } 1728 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1729 rc = ksmbd_session_register(conn, sess); 1730 if (rc) 1731 goto out_err; 1732 1733 conn->binding = false; 1734 } else if (conn->dialect >= SMB30_PROT_ID && 1735 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1736 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1737 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1738 1739 sess = ksmbd_session_lookup_slowpath(sess_id); 1740 if (!sess) { 1741 rc = -ENOENT; 1742 goto out_err; 1743 } 1744 1745 if (conn->dialect != sess->dialect) { 1746 rc = -EINVAL; 1747 goto out_err; 1748 } 1749 1750 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1751 rc = -EINVAL; 1752 goto out_err; 1753 } 1754 1755 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1756 SMB2_CLIENT_GUID_SIZE)) { 1757 rc = -ENOENT; 1758 goto out_err; 1759 } 1760 1761 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1762 rc = -EACCES; 1763 goto out_err; 1764 } 1765 1766 if (sess->state == SMB2_SESSION_EXPIRED) { 1767 rc = -EFAULT; 1768 goto out_err; 1769 } 1770 1771 if (ksmbd_conn_need_reconnect(conn)) { 1772 rc = -EFAULT; 1773 ksmbd_user_session_put(sess); 1774 sess = NULL; 1775 goto out_err; 1776 } 1777 1778 if (is_ksmbd_session_in_connection(conn, sess_id)) { 1779 rc = -EACCES; 1780 goto out_err; 1781 } 1782 1783 if (user_guest(sess->user)) { 1784 rc = -EOPNOTSUPP; 1785 goto out_err; 1786 } 1787 1788 conn->binding = true; 1789 } else if ((conn->dialect < SMB30_PROT_ID || 1790 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1791 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1792 sess = NULL; 1793 rc = -EACCES; 1794 goto out_err; 1795 } else { 1796 sess = ksmbd_session_lookup(conn, 1797 le64_to_cpu(req->hdr.SessionId)); 1798 if (!sess) { 1799 rc = -ENOENT; 1800 goto out_err; 1801 } 1802 1803 if (sess->state == SMB2_SESSION_EXPIRED) { 1804 rc = -EFAULT; 1805 goto out_err; 1806 } 1807 1808 if (ksmbd_conn_need_reconnect(conn)) { 1809 rc = -EFAULT; 1810 ksmbd_user_session_put(sess); 1811 sess = NULL; 1812 goto out_err; 1813 } 1814 1815 conn->binding = false; 1816 } 1817 work->sess = sess; 1818 1819 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1820 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1821 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { 1822 rc = -EINVAL; 1823 goto out_err; 1824 } 1825 1826 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1827 negblob_off); 1828 1829 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1830 if (conn->mechToken) { 1831 negblob = (struct negotiate_message *)conn->mechToken; 1832 negblob_len = conn->mechTokenLen; 1833 } 1834 } 1835 1836 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1837 rc = -EINVAL; 1838 goto out_err; 1839 } 1840 1841 if (server_conf.auth_mechs & conn->auth_mechs) { 1842 rc = generate_preauth_hash(work); 1843 if (rc) 1844 goto out_err; 1845 1846 if (conn->preferred_auth_mech & 1847 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1848 rc = krb5_authenticate(work, req, rsp); 1849 if (rc) { 1850 rc = -EINVAL; 1851 goto out_err; 1852 } 1853 1854 if (!ksmbd_conn_need_reconnect(conn)) { 1855 ksmbd_conn_set_good(conn); 1856 sess->state = SMB2_SESSION_VALID; 1857 } 1858 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1859 if (negblob->MessageType == NtLmNegotiate) { 1860 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1861 if (rc) 1862 goto out_err; 1863 rsp->hdr.Status = 1864 STATUS_MORE_PROCESSING_REQUIRED; 1865 } else if (negblob->MessageType == NtLmAuthenticate) { 1866 rc = ntlm_authenticate(work, req, rsp); 1867 if (rc) 1868 goto out_err; 1869 1870 if (!ksmbd_conn_need_reconnect(conn)) { 1871 ksmbd_conn_set_good(conn); 1872 sess->state = SMB2_SESSION_VALID; 1873 } 1874 if (conn->binding) { 1875 struct preauth_session *preauth_sess; 1876 1877 preauth_sess = 1878 ksmbd_preauth_session_lookup(conn, sess->id); 1879 if (preauth_sess) { 1880 list_del(&preauth_sess->preauth_entry); 1881 kfree(preauth_sess); 1882 } 1883 } 1884 } else { 1885 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1886 le32_to_cpu(negblob->MessageType)); 1887 rc = -EINVAL; 1888 } 1889 } else { 1890 /* TODO: need one more negotiation */ 1891 pr_err("Not support the preferred authentication\n"); 1892 rc = -EINVAL; 1893 } 1894 } else { 1895 pr_err("Not support authentication\n"); 1896 rc = -EINVAL; 1897 } 1898 1899 out_err: 1900 if (rc == -EINVAL) 1901 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1902 else if (rc == -ENOENT) 1903 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1904 else if (rc == -EACCES) 1905 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1906 else if (rc == -EFAULT) 1907 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1908 else if (rc == -ENOMEM) 1909 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1910 else if (rc == -EOPNOTSUPP) 1911 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1912 else if (rc) 1913 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1914 1915 if (conn->use_spnego && conn->mechToken) { 1916 kfree(conn->mechToken); 1917 conn->mechToken = NULL; 1918 } 1919 1920 if (rc < 0) { 1921 /* 1922 * SecurityBufferOffset should be set to zero 1923 * in session setup error response. 1924 */ 1925 rsp->SecurityBufferOffset = 0; 1926 1927 if (sess) { 1928 bool try_delay = false; 1929 1930 /* 1931 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1932 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1933 * failure to make it harder to send enough random connection requests 1934 * to break into a server. 1935 */ 1936 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1937 try_delay = true; 1938 1939 sess->last_active = jiffies; 1940 sess->state = SMB2_SESSION_EXPIRED; 1941 ksmbd_user_session_put(sess); 1942 work->sess = NULL; 1943 if (try_delay) { 1944 ksmbd_conn_set_need_reconnect(conn); 1945 ssleep(5); 1946 ksmbd_conn_set_need_setup(conn); 1947 } 1948 } 1949 smb2_set_err_rsp(work); 1950 } else { 1951 unsigned int iov_len; 1952 1953 if (rsp->SecurityBufferLength) 1954 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1955 le16_to_cpu(rsp->SecurityBufferLength); 1956 else 1957 iov_len = sizeof(struct smb2_sess_setup_rsp); 1958 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1959 if (rc) 1960 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1961 } 1962 1963 ksmbd_conn_unlock(conn); 1964 return rc; 1965 } 1966 1967 /** 1968 * smb2_tree_connect() - handler for smb2 tree connect command 1969 * @work: smb work containing smb request buffer 1970 * 1971 * Return: 0 on success, otherwise error 1972 */ 1973 int smb2_tree_connect(struct ksmbd_work *work) 1974 { 1975 struct ksmbd_conn *conn = work->conn; 1976 struct smb2_tree_connect_req *req; 1977 struct smb2_tree_connect_rsp *rsp; 1978 struct ksmbd_session *sess = work->sess; 1979 char *treename = NULL, *name = NULL; 1980 struct ksmbd_tree_conn_status status; 1981 struct ksmbd_share_config *share = NULL; 1982 int rc = -EINVAL; 1983 1984 ksmbd_debug(SMB, "Received smb2 tree connect request\n"); 1985 1986 WORK_BUFFERS(work, req, rsp); 1987 1988 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), 1989 le16_to_cpu(req->PathLength), true, 1990 conn->local_nls); 1991 if (IS_ERR(treename)) { 1992 pr_err("treename is NULL\n"); 1993 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1994 goto out_err1; 1995 } 1996 1997 name = ksmbd_extract_sharename(conn->um, treename); 1998 if (IS_ERR(name)) { 1999 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 2000 goto out_err1; 2001 } 2002 2003 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 2004 name, treename); 2005 2006 status = ksmbd_tree_conn_connect(work, name); 2007 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 2008 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 2009 else 2010 goto out_err1; 2011 2012 share = status.tree_conn->share_conf; 2013 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2014 ksmbd_debug(SMB, "IPC share path request\n"); 2015 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 2016 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2017 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 2018 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 2019 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2020 FILE_SYNCHRONIZE_LE; 2021 } else { 2022 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 2023 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2024 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 2025 if (test_tree_conn_flag(status.tree_conn, 2026 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2027 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 2028 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 2029 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 2030 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 2031 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2032 FILE_SYNCHRONIZE_LE; 2033 } 2034 } 2035 2036 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 2037 if (conn->posix_ext_supported) 2038 status.tree_conn->posix_extensions = true; 2039 2040 down_write(&sess->tree_conns_lock); 2041 status.tree_conn->t_state = TREE_CONNECTED; 2042 up_write(&sess->tree_conns_lock); 2043 rsp->StructureSize = cpu_to_le16(16); 2044 out_err1: 2045 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share && 2046 test_share_config_flag(share, 2047 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 2048 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY; 2049 else 2050 rsp->Capabilities = 0; 2051 rsp->Reserved = 0; 2052 /* default manual caching */ 2053 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2054 2055 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2056 if (rc) 2057 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2058 2059 if (!IS_ERR(treename)) 2060 kfree(treename); 2061 if (!IS_ERR(name)) 2062 kfree(name); 2063 2064 switch (status.ret) { 2065 case KSMBD_TREE_CONN_STATUS_OK: 2066 rsp->hdr.Status = STATUS_SUCCESS; 2067 rc = 0; 2068 break; 2069 case -ESTALE: 2070 case -ENOENT: 2071 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2072 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2073 break; 2074 case -ENOMEM: 2075 case KSMBD_TREE_CONN_STATUS_NOMEM: 2076 rsp->hdr.Status = STATUS_NO_MEMORY; 2077 break; 2078 case KSMBD_TREE_CONN_STATUS_ERROR: 2079 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2080 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2081 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2082 break; 2083 case -EINVAL: 2084 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2085 break; 2086 default: 2087 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2088 } 2089 2090 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2091 smb2_set_err_rsp(work); 2092 2093 return rc; 2094 } 2095 2096 /** 2097 * smb2_create_open_flags() - convert smb open flags to unix open flags 2098 * @file_present: is file already present 2099 * @access: file access flags 2100 * @disposition: file disposition flags 2101 * @may_flags: set with MAY_ flags 2102 * @coptions: file creation options 2103 * @mode: file mode 2104 * 2105 * Return: file open flags 2106 */ 2107 static int smb2_create_open_flags(bool file_present, __le32 access, 2108 __le32 disposition, 2109 int *may_flags, 2110 __le32 coptions, 2111 umode_t mode) 2112 { 2113 int oflags = O_NONBLOCK | O_LARGEFILE; 2114 2115 if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) { 2116 access &= ~FILE_WRITE_DESIRE_ACCESS_LE; 2117 ksmbd_debug(SMB, "Discard write access to a directory\n"); 2118 } 2119 2120 if (access & FILE_READ_DESIRED_ACCESS_LE && 2121 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2122 oflags |= O_RDWR; 2123 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2124 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2125 oflags |= O_WRONLY; 2126 *may_flags = MAY_OPEN | MAY_WRITE; 2127 } else { 2128 oflags |= O_RDONLY; 2129 *may_flags = MAY_OPEN | MAY_READ; 2130 } 2131 2132 if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode)) 2133 oflags |= O_PATH; 2134 2135 if (file_present) { 2136 switch (disposition & FILE_CREATE_MASK_LE) { 2137 case FILE_OPEN_LE: 2138 case FILE_CREATE_LE: 2139 break; 2140 case FILE_SUPERSEDE_LE: 2141 case FILE_OVERWRITE_LE: 2142 case FILE_OVERWRITE_IF_LE: 2143 oflags |= O_TRUNC; 2144 break; 2145 default: 2146 break; 2147 } 2148 } else { 2149 switch (disposition & FILE_CREATE_MASK_LE) { 2150 case FILE_SUPERSEDE_LE: 2151 case FILE_CREATE_LE: 2152 case FILE_OPEN_IF_LE: 2153 case FILE_OVERWRITE_IF_LE: 2154 oflags |= O_CREAT; 2155 break; 2156 case FILE_OPEN_LE: 2157 case FILE_OVERWRITE_LE: 2158 oflags &= ~O_CREAT; 2159 break; 2160 default: 2161 break; 2162 } 2163 } 2164 2165 return oflags; 2166 } 2167 2168 /** 2169 * smb2_tree_disconnect() - handler for smb tree connect request 2170 * @work: smb work containing request buffer 2171 * 2172 * Return: 0 on success, otherwise error 2173 */ 2174 int smb2_tree_disconnect(struct ksmbd_work *work) 2175 { 2176 struct smb2_tree_disconnect_rsp *rsp; 2177 struct smb2_tree_disconnect_req *req; 2178 struct ksmbd_session *sess = work->sess; 2179 struct ksmbd_tree_connect *tcon = work->tcon; 2180 int err; 2181 2182 ksmbd_debug(SMB, "Received smb2 tree disconnect request\n"); 2183 2184 WORK_BUFFERS(work, req, rsp); 2185 2186 if (!tcon) { 2187 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2188 2189 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2190 err = -ENOENT; 2191 goto err_out; 2192 } 2193 2194 ksmbd_close_tree_conn_fds(work); 2195 2196 down_write(&sess->tree_conns_lock); 2197 if (tcon->t_state == TREE_DISCONNECTED) { 2198 up_write(&sess->tree_conns_lock); 2199 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2200 err = -ENOENT; 2201 goto err_out; 2202 } 2203 2204 tcon->t_state = TREE_DISCONNECTED; 2205 up_write(&sess->tree_conns_lock); 2206 2207 err = ksmbd_tree_conn_disconnect(sess, tcon); 2208 if (err) { 2209 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2210 goto err_out; 2211 } 2212 2213 rsp->StructureSize = cpu_to_le16(4); 2214 err = ksmbd_iov_pin_rsp(work, rsp, 2215 sizeof(struct smb2_tree_disconnect_rsp)); 2216 if (err) { 2217 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2218 goto err_out; 2219 } 2220 2221 return 0; 2222 2223 err_out: 2224 smb2_set_err_rsp(work); 2225 return err; 2226 2227 } 2228 2229 /** 2230 * smb2_session_logoff() - handler for session log off request 2231 * @work: smb work containing request buffer 2232 * 2233 * Return: 0 on success, otherwise error 2234 */ 2235 int smb2_session_logoff(struct ksmbd_work *work) 2236 { 2237 struct ksmbd_conn *conn = work->conn; 2238 struct ksmbd_session *sess = work->sess; 2239 struct smb2_logoff_req *req; 2240 struct smb2_logoff_rsp *rsp; 2241 u64 sess_id; 2242 int err; 2243 2244 WORK_BUFFERS(work, req, rsp); 2245 2246 ksmbd_debug(SMB, "Received smb2 session logoff request\n"); 2247 2248 ksmbd_conn_lock(conn); 2249 if (!ksmbd_conn_good(conn)) { 2250 ksmbd_conn_unlock(conn); 2251 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2252 smb2_set_err_rsp(work); 2253 return -ENOENT; 2254 } 2255 sess_id = le64_to_cpu(req->hdr.SessionId); 2256 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2257 ksmbd_conn_unlock(conn); 2258 2259 ksmbd_close_session_fds(work); 2260 ksmbd_conn_wait_idle(conn); 2261 2262 if (ksmbd_tree_conn_session_logoff(sess)) { 2263 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2264 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2265 smb2_set_err_rsp(work); 2266 return -ENOENT; 2267 } 2268 2269 down_write(&conn->session_lock); 2270 sess->state = SMB2_SESSION_EXPIRED; 2271 up_write(&conn->session_lock); 2272 2273 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_SETUP); 2274 2275 rsp->StructureSize = cpu_to_le16(4); 2276 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2277 if (err) { 2278 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2279 smb2_set_err_rsp(work); 2280 return err; 2281 } 2282 return 0; 2283 } 2284 2285 /** 2286 * create_smb2_pipe() - create IPC pipe 2287 * @work: smb work containing request buffer 2288 * 2289 * Return: 0 on success, otherwise error 2290 */ 2291 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2292 { 2293 struct smb2_create_rsp *rsp; 2294 struct smb2_create_req *req; 2295 int id = -1; 2296 int err; 2297 char *name; 2298 2299 WORK_BUFFERS(work, req, rsp); 2300 2301 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2302 1, work->conn->local_nls); 2303 if (IS_ERR(name)) { 2304 rsp->hdr.Status = STATUS_NO_MEMORY; 2305 err = PTR_ERR(name); 2306 goto out; 2307 } 2308 2309 id = ksmbd_session_rpc_open(work->sess, name); 2310 if (id < 0) { 2311 pr_err("Unable to open RPC pipe: %d\n", id); 2312 err = id; 2313 goto out; 2314 } 2315 2316 rsp->hdr.Status = STATUS_SUCCESS; 2317 rsp->StructureSize = cpu_to_le16(89); 2318 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2319 rsp->Flags = 0; 2320 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2321 2322 rsp->CreationTime = cpu_to_le64(0); 2323 rsp->LastAccessTime = cpu_to_le64(0); 2324 rsp->ChangeTime = cpu_to_le64(0); 2325 rsp->AllocationSize = cpu_to_le64(0); 2326 rsp->EndofFile = cpu_to_le64(0); 2327 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2328 rsp->Reserved2 = 0; 2329 rsp->VolatileFileId = id; 2330 rsp->PersistentFileId = 0; 2331 rsp->CreateContextsOffset = 0; 2332 rsp->CreateContextsLength = 0; 2333 2334 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2335 if (err) 2336 goto out; 2337 2338 kfree(name); 2339 return 0; 2340 2341 out: 2342 switch (err) { 2343 case -EINVAL: 2344 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2345 break; 2346 case -ENOSPC: 2347 case -ENOMEM: 2348 rsp->hdr.Status = STATUS_NO_MEMORY; 2349 break; 2350 } 2351 2352 if (id >= 0) 2353 ksmbd_session_rpc_close(work->sess, id); 2354 2355 if (!IS_ERR(name)) 2356 kfree(name); 2357 2358 smb2_set_err_rsp(work); 2359 return err; 2360 } 2361 2362 /** 2363 * smb2_set_ea() - handler for setting extended attributes using set 2364 * info command 2365 * @eabuf: set info command buffer 2366 * @buf_len: set info command buffer length 2367 * @path: dentry path for get ea 2368 * @get_write: get write access to a mount 2369 * 2370 * Return: 0 on success, otherwise error 2371 */ 2372 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2373 const struct path *path, bool get_write) 2374 { 2375 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2376 char *attr_name = NULL, *value; 2377 int rc = 0; 2378 unsigned int next = 0; 2379 2380 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2381 le16_to_cpu(eabuf->EaValueLength)) 2382 return -EINVAL; 2383 2384 attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP); 2385 if (!attr_name) 2386 return -ENOMEM; 2387 2388 do { 2389 if (!eabuf->EaNameLength) 2390 goto next; 2391 2392 ksmbd_debug(SMB, 2393 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2394 eabuf->name, eabuf->EaNameLength, 2395 le16_to_cpu(eabuf->EaValueLength), 2396 le32_to_cpu(eabuf->NextEntryOffset)); 2397 2398 if (eabuf->EaNameLength > 2399 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2400 rc = -EINVAL; 2401 break; 2402 } 2403 2404 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2405 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2406 eabuf->EaNameLength); 2407 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2408 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2409 2410 if (!eabuf->EaValueLength) { 2411 rc = ksmbd_vfs_casexattr_len(idmap, 2412 path->dentry, 2413 attr_name, 2414 XATTR_USER_PREFIX_LEN + 2415 eabuf->EaNameLength); 2416 2417 /* delete the EA only when it exits */ 2418 if (rc > 0) { 2419 rc = ksmbd_vfs_remove_xattr(idmap, 2420 path, 2421 attr_name, 2422 get_write); 2423 2424 if (rc < 0) { 2425 ksmbd_debug(SMB, 2426 "remove xattr failed(%d)\n", 2427 rc); 2428 break; 2429 } 2430 } 2431 2432 /* if the EA doesn't exist, just do nothing. */ 2433 rc = 0; 2434 } else { 2435 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2436 le16_to_cpu(eabuf->EaValueLength), 2437 0, get_write); 2438 if (rc < 0) { 2439 ksmbd_debug(SMB, 2440 "ksmbd_vfs_setxattr is failed(%d)\n", 2441 rc); 2442 break; 2443 } 2444 } 2445 2446 next: 2447 next = le32_to_cpu(eabuf->NextEntryOffset); 2448 if (next == 0 || buf_len < next) 2449 break; 2450 buf_len -= next; 2451 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2452 if (buf_len < sizeof(struct smb2_ea_info)) { 2453 rc = -EINVAL; 2454 break; 2455 } 2456 2457 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2458 le16_to_cpu(eabuf->EaValueLength)) { 2459 rc = -EINVAL; 2460 break; 2461 } 2462 } while (next != 0); 2463 2464 kfree(attr_name); 2465 return rc; 2466 } 2467 2468 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2469 struct ksmbd_file *fp, 2470 char *stream_name, int s_type) 2471 { 2472 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2473 size_t xattr_stream_size; 2474 char *xattr_stream_name; 2475 int rc; 2476 2477 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2478 &xattr_stream_name, 2479 &xattr_stream_size, 2480 s_type); 2481 if (rc) 2482 return rc; 2483 2484 fp->stream.name = xattr_stream_name; 2485 fp->stream.size = xattr_stream_size; 2486 2487 /* Check if there is stream prefix in xattr space */ 2488 rc = ksmbd_vfs_casexattr_len(idmap, 2489 path->dentry, 2490 xattr_stream_name, 2491 xattr_stream_size); 2492 if (rc >= 0) 2493 return 0; 2494 2495 if (fp->cdoption == FILE_OPEN_LE) { 2496 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2497 return -EBADF; 2498 } 2499 2500 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2501 if (rc < 0) 2502 pr_err("Failed to store XATTR stream name :%d\n", rc); 2503 return 0; 2504 } 2505 2506 static int smb2_remove_smb_xattrs(const struct path *path) 2507 { 2508 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2509 char *name, *xattr_list = NULL; 2510 ssize_t xattr_list_len; 2511 int err = 0; 2512 2513 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2514 if (xattr_list_len < 0) { 2515 goto out; 2516 } else if (!xattr_list_len) { 2517 ksmbd_debug(SMB, "empty xattr in the file\n"); 2518 goto out; 2519 } 2520 2521 for (name = xattr_list; name - xattr_list < xattr_list_len; 2522 name += strlen(name) + 1) { 2523 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2524 2525 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2526 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2527 STREAM_PREFIX_LEN)) { 2528 err = ksmbd_vfs_remove_xattr(idmap, path, 2529 name, true); 2530 if (err) 2531 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2532 name); 2533 } 2534 } 2535 out: 2536 kvfree(xattr_list); 2537 return err; 2538 } 2539 2540 static int smb2_create_truncate(const struct path *path) 2541 { 2542 int rc = vfs_truncate(path, 0); 2543 2544 if (rc) { 2545 pr_err("vfs_truncate failed, rc %d\n", rc); 2546 return rc; 2547 } 2548 2549 rc = smb2_remove_smb_xattrs(path); 2550 if (rc == -EOPNOTSUPP) 2551 rc = 0; 2552 if (rc) 2553 ksmbd_debug(SMB, 2554 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2555 rc); 2556 return rc; 2557 } 2558 2559 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2560 struct ksmbd_file *fp) 2561 { 2562 struct xattr_dos_attrib da = {0}; 2563 int rc; 2564 2565 if (!test_share_config_flag(tcon->share_conf, 2566 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2567 return; 2568 2569 da.version = 4; 2570 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2571 da.itime = da.create_time = fp->create_time; 2572 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2573 XATTR_DOSINFO_ITIME; 2574 2575 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); 2576 if (rc) 2577 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2578 } 2579 2580 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2581 const struct path *path, struct ksmbd_file *fp) 2582 { 2583 struct xattr_dos_attrib da; 2584 int rc; 2585 2586 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2587 2588 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2589 if (!test_share_config_flag(tcon->share_conf, 2590 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2591 return; 2592 2593 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2594 path->dentry, &da); 2595 if (rc > 0) { 2596 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2597 fp->create_time = da.create_time; 2598 fp->itime = da.itime; 2599 } 2600 } 2601 2602 static int smb2_creat(struct ksmbd_work *work, 2603 struct path *path, char *name, int open_flags, 2604 umode_t posix_mode, bool is_dir) 2605 { 2606 struct ksmbd_tree_connect *tcon = work->tcon; 2607 struct ksmbd_share_config *share = tcon->share_conf; 2608 umode_t mode; 2609 int rc; 2610 2611 if (!(open_flags & O_CREAT)) 2612 return -EBADF; 2613 2614 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2615 if (is_dir == true) { 2616 ksmbd_debug(SMB, "creating directory\n"); 2617 2618 mode = share_config_directory_mode(share, posix_mode); 2619 rc = ksmbd_vfs_mkdir(work, name, mode); 2620 if (rc) 2621 return rc; 2622 } else { 2623 ksmbd_debug(SMB, "creating regular file\n"); 2624 2625 mode = share_config_create_mode(share, posix_mode); 2626 rc = ksmbd_vfs_create(work, name, mode); 2627 if (rc) 2628 return rc; 2629 } 2630 2631 rc = ksmbd_vfs_kern_path(work, name, 0, path, 0); 2632 if (rc) { 2633 pr_err("cannot get linux path (%s), err = %d\n", 2634 name, rc); 2635 return rc; 2636 } 2637 return 0; 2638 } 2639 2640 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2641 struct smb2_create_req *req, 2642 const struct path *path) 2643 { 2644 struct create_context *context; 2645 struct create_sd_buf_req *sd_buf; 2646 2647 if (!req->CreateContextsOffset) 2648 return -ENOENT; 2649 2650 /* Parse SD BUFFER create contexts */ 2651 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2652 if (!context) 2653 return -ENOENT; 2654 else if (IS_ERR(context)) 2655 return PTR_ERR(context); 2656 2657 ksmbd_debug(SMB, 2658 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2659 sd_buf = (struct create_sd_buf_req *)context; 2660 if (le16_to_cpu(context->DataOffset) + 2661 le32_to_cpu(context->DataLength) < 2662 sizeof(struct create_sd_buf_req)) 2663 return -EINVAL; 2664 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2665 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2666 } 2667 2668 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2669 struct mnt_idmap *idmap, 2670 struct inode *inode) 2671 { 2672 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2673 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2674 2675 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2676 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2677 fattr->cf_mode = inode->i_mode; 2678 fattr->cf_acls = NULL; 2679 fattr->cf_dacls = NULL; 2680 2681 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2682 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2683 if (S_ISDIR(inode->i_mode)) 2684 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2685 } 2686 } 2687 2688 enum { 2689 DURABLE_RECONN_V2 = 1, 2690 DURABLE_RECONN, 2691 DURABLE_REQ_V2, 2692 DURABLE_REQ, 2693 }; 2694 2695 struct durable_info { 2696 struct ksmbd_file *fp; 2697 unsigned short int type; 2698 bool persistent; 2699 bool reconnected; 2700 unsigned int timeout; 2701 char *CreateGuid; 2702 }; 2703 2704 static int parse_durable_handle_context(struct ksmbd_work *work, 2705 struct smb2_create_req *req, 2706 struct lease_ctx_info *lc, 2707 struct durable_info *dh_info) 2708 { 2709 struct ksmbd_conn *conn = work->conn; 2710 struct create_context *context; 2711 int dh_idx, err = 0; 2712 u64 persistent_id = 0; 2713 int req_op_level; 2714 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; 2715 2716 req_op_level = req->RequestedOplockLevel; 2717 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); 2718 dh_idx++) { 2719 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); 2720 if (IS_ERR(context)) { 2721 err = PTR_ERR(context); 2722 goto out; 2723 } 2724 if (!context) 2725 continue; 2726 2727 switch (dh_idx) { 2728 case DURABLE_RECONN_V2: 2729 { 2730 struct create_durable_handle_reconnect_v2 *recon_v2; 2731 2732 if (dh_info->type == DURABLE_RECONN || 2733 dh_info->type == DURABLE_REQ_V2) { 2734 err = -EINVAL; 2735 goto out; 2736 } 2737 2738 if (le16_to_cpu(context->DataOffset) + 2739 le32_to_cpu(context->DataLength) < 2740 sizeof(struct create_durable_handle_reconnect_v2)) { 2741 err = -EINVAL; 2742 goto out; 2743 } 2744 2745 recon_v2 = (struct create_durable_handle_reconnect_v2 *)context; 2746 persistent_id = recon_v2->dcontext.Fid.PersistentFileId; 2747 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2748 if (!dh_info->fp) { 2749 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2750 err = -EBADF; 2751 goto out; 2752 } 2753 2754 if (memcmp(dh_info->fp->create_guid, recon_v2->dcontext.CreateGuid, 2755 SMB2_CREATE_GUID_SIZE)) { 2756 err = -EBADF; 2757 ksmbd_put_durable_fd(dh_info->fp); 2758 goto out; 2759 } 2760 2761 dh_info->type = dh_idx; 2762 dh_info->reconnected = true; 2763 ksmbd_debug(SMB, 2764 "reconnect v2 Persistent-id from reconnect = %llu\n", 2765 persistent_id); 2766 break; 2767 } 2768 case DURABLE_RECONN: 2769 { 2770 create_durable_reconn_t *recon; 2771 2772 if (dh_info->type == DURABLE_RECONN_V2 || 2773 dh_info->type == DURABLE_REQ_V2) { 2774 err = -EINVAL; 2775 goto out; 2776 } 2777 2778 if (le16_to_cpu(context->DataOffset) + 2779 le32_to_cpu(context->DataLength) < 2780 sizeof(create_durable_reconn_t)) { 2781 err = -EINVAL; 2782 goto out; 2783 } 2784 2785 recon = (create_durable_reconn_t *)context; 2786 persistent_id = recon->Data.Fid.PersistentFileId; 2787 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2788 if (!dh_info->fp) { 2789 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2790 err = -EBADF; 2791 goto out; 2792 } 2793 2794 dh_info->type = dh_idx; 2795 dh_info->reconnected = true; 2796 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", 2797 persistent_id); 2798 break; 2799 } 2800 case DURABLE_REQ_V2: 2801 { 2802 struct create_durable_req_v2 *durable_v2_blob; 2803 2804 if (dh_info->type == DURABLE_RECONN || 2805 dh_info->type == DURABLE_RECONN_V2) { 2806 err = -EINVAL; 2807 goto out; 2808 } 2809 2810 if (le16_to_cpu(context->DataOffset) + 2811 le32_to_cpu(context->DataLength) < 2812 sizeof(struct create_durable_req_v2)) { 2813 err = -EINVAL; 2814 goto out; 2815 } 2816 2817 durable_v2_blob = 2818 (struct create_durable_req_v2 *)context; 2819 ksmbd_debug(SMB, "Request for durable v2 open\n"); 2820 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->dcontext.CreateGuid); 2821 if (dh_info->fp) { 2822 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, 2823 SMB2_CLIENT_GUID_SIZE)) { 2824 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { 2825 err = -ENOEXEC; 2826 ksmbd_put_durable_fd(dh_info->fp); 2827 goto out; 2828 } 2829 2830 dh_info->fp->conn = conn; 2831 dh_info->reconnected = true; 2832 goto out; 2833 } 2834 } 2835 2836 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2837 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2838 dh_info->CreateGuid = 2839 durable_v2_blob->dcontext.CreateGuid; 2840 dh_info->persistent = 2841 le32_to_cpu(durable_v2_blob->dcontext.Flags); 2842 dh_info->timeout = 2843 le32_to_cpu(durable_v2_blob->dcontext.Timeout); 2844 dh_info->type = dh_idx; 2845 } 2846 break; 2847 } 2848 case DURABLE_REQ: 2849 if (dh_info->type == DURABLE_RECONN) 2850 goto out; 2851 if (dh_info->type == DURABLE_RECONN_V2 || 2852 dh_info->type == DURABLE_REQ_V2) { 2853 err = -EINVAL; 2854 goto out; 2855 } 2856 2857 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2858 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2859 ksmbd_debug(SMB, "Request for durable open\n"); 2860 dh_info->type = dh_idx; 2861 } 2862 } 2863 } 2864 2865 out: 2866 return err; 2867 } 2868 2869 /** 2870 * smb2_open() - handler for smb file open request 2871 * @work: smb work containing request buffer 2872 * 2873 * Return: 0 on success, otherwise error 2874 */ 2875 int smb2_open(struct ksmbd_work *work) 2876 { 2877 struct ksmbd_conn *conn = work->conn; 2878 struct ksmbd_session *sess = work->sess; 2879 struct ksmbd_tree_connect *tcon = work->tcon; 2880 struct smb2_create_req *req; 2881 struct smb2_create_rsp *rsp; 2882 struct path path; 2883 struct ksmbd_share_config *share = tcon->share_conf; 2884 struct ksmbd_file *fp = NULL; 2885 struct file *filp = NULL; 2886 struct mnt_idmap *idmap = NULL; 2887 struct kstat stat; 2888 struct create_context *context; 2889 struct lease_ctx_info *lc = NULL; 2890 struct create_ea_buf_req *ea_buf = NULL; 2891 struct oplock_info *opinfo; 2892 struct durable_info dh_info = {0}; 2893 __le32 *next_ptr = NULL; 2894 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2895 int rc = 0; 2896 int contxt_cnt = 0, query_disk_id = 0; 2897 bool maximal_access_ctxt = false, posix_ctxt = false; 2898 int s_type = 0; 2899 int next_off = 0; 2900 char *name = NULL; 2901 char *stream_name = NULL; 2902 bool file_present = false, created = false, already_permitted = false; 2903 int share_ret, need_truncate = 0; 2904 u64 time; 2905 umode_t posix_mode = 0; 2906 __le32 daccess, maximal_access = 0; 2907 int iov_len = 0; 2908 2909 ksmbd_debug(SMB, "Received smb2 create request\n"); 2910 2911 WORK_BUFFERS(work, req, rsp); 2912 2913 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2914 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2915 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2916 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2917 smb2_set_err_rsp(work); 2918 return -EINVAL; 2919 } 2920 2921 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2922 ksmbd_debug(SMB, "IPC pipe create request\n"); 2923 return create_smb2_pipe(work); 2924 } 2925 2926 if (req->CreateContextsOffset && tcon->posix_extensions) { 2927 context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); 2928 if (IS_ERR(context)) { 2929 rc = PTR_ERR(context); 2930 goto err_out2; 2931 } else if (context) { 2932 struct create_posix *posix = (struct create_posix *)context; 2933 2934 if (le16_to_cpu(context->DataOffset) + 2935 le32_to_cpu(context->DataLength) < 2936 sizeof(struct create_posix) - 4) { 2937 rc = -EINVAL; 2938 goto err_out2; 2939 } 2940 ksmbd_debug(SMB, "get posix context\n"); 2941 2942 posix_mode = le32_to_cpu(posix->Mode); 2943 posix_ctxt = true; 2944 } 2945 } 2946 2947 if (req->NameLength) { 2948 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), 2949 le16_to_cpu(req->NameLength), 2950 work->conn->local_nls); 2951 if (IS_ERR(name)) { 2952 rc = PTR_ERR(name); 2953 name = NULL; 2954 goto err_out2; 2955 } 2956 2957 ksmbd_debug(SMB, "converted name = %s\n", name); 2958 2959 if (posix_ctxt == false) { 2960 if (strchr(name, ':')) { 2961 if (!test_share_config_flag(work->tcon->share_conf, 2962 KSMBD_SHARE_FLAG_STREAMS)) { 2963 rc = -EBADF; 2964 goto err_out2; 2965 } 2966 rc = parse_stream_name(name, &stream_name, &s_type); 2967 if (rc < 0) 2968 goto err_out2; 2969 } 2970 2971 rc = ksmbd_validate_filename(name); 2972 if (rc < 0) 2973 goto err_out2; 2974 } 2975 2976 if (ksmbd_share_veto_filename(share, name)) { 2977 rc = -ENOENT; 2978 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2979 name); 2980 goto err_out2; 2981 } 2982 } else { 2983 name = kstrdup("", KSMBD_DEFAULT_GFP); 2984 if (!name) { 2985 rc = -ENOMEM; 2986 goto err_out2; 2987 } 2988 } 2989 2990 req_op_level = req->RequestedOplockLevel; 2991 2992 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && 2993 req->CreateContextsOffset) { 2994 lc = parse_lease_state(req); 2995 rc = parse_durable_handle_context(work, req, lc, &dh_info); 2996 if (rc) { 2997 ksmbd_debug(SMB, "error parsing durable handle context\n"); 2998 goto err_out2; 2999 } 3000 3001 if (dh_info.reconnected == true) { 3002 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name); 3003 if (rc) { 3004 ksmbd_put_durable_fd(dh_info.fp); 3005 goto err_out2; 3006 } 3007 3008 rc = ksmbd_reopen_durable_fd(work, dh_info.fp); 3009 if (rc) { 3010 ksmbd_put_durable_fd(dh_info.fp); 3011 goto err_out2; 3012 } 3013 3014 if (ksmbd_override_fsids(work)) { 3015 rc = -ENOMEM; 3016 ksmbd_put_durable_fd(dh_info.fp); 3017 goto err_out2; 3018 } 3019 3020 fp = dh_info.fp; 3021 file_info = FILE_OPENED; 3022 3023 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); 3024 ksmbd_put_durable_fd(fp); 3025 if (rc) 3026 goto err_out2; 3027 3028 goto reconnected_fp; 3029 } 3030 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 3031 lc = parse_lease_state(req); 3032 3033 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 3034 pr_err("Invalid impersonationlevel : 0x%x\n", 3035 le32_to_cpu(req->ImpersonationLevel)); 3036 rc = -EIO; 3037 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 3038 goto err_out2; 3039 } 3040 3041 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 3042 pr_err("Invalid create options : 0x%x\n", 3043 le32_to_cpu(req->CreateOptions)); 3044 rc = -EINVAL; 3045 goto err_out2; 3046 } else { 3047 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 3048 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 3049 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 3050 3051 if (req->CreateOptions & 3052 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 3053 FILE_RESERVE_OPFILTER_LE)) { 3054 rc = -EOPNOTSUPP; 3055 goto err_out2; 3056 } 3057 3058 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3059 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 3060 rc = -EINVAL; 3061 goto err_out2; 3062 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 3063 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 3064 } 3065 } 3066 } 3067 3068 if (le32_to_cpu(req->CreateDisposition) > 3069 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 3070 pr_err("Invalid create disposition : 0x%x\n", 3071 le32_to_cpu(req->CreateDisposition)); 3072 rc = -EINVAL; 3073 goto err_out2; 3074 } 3075 3076 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 3077 pr_err("Invalid desired access : 0x%x\n", 3078 le32_to_cpu(req->DesiredAccess)); 3079 rc = -EACCES; 3080 goto err_out2; 3081 } 3082 3083 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 3084 pr_err("Invalid file attribute : 0x%x\n", 3085 le32_to_cpu(req->FileAttributes)); 3086 rc = -EINVAL; 3087 goto err_out2; 3088 } 3089 3090 if (req->CreateContextsOffset) { 3091 /* Parse non-durable handle create contexts */ 3092 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 3093 if (IS_ERR(context)) { 3094 rc = PTR_ERR(context); 3095 goto err_out2; 3096 } else if (context) { 3097 ea_buf = (struct create_ea_buf_req *)context; 3098 if (le16_to_cpu(context->DataOffset) + 3099 le32_to_cpu(context->DataLength) < 3100 sizeof(struct create_ea_buf_req)) { 3101 rc = -EINVAL; 3102 goto err_out2; 3103 } 3104 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 3105 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3106 rc = -EACCES; 3107 goto err_out2; 3108 } 3109 } 3110 3111 context = smb2_find_context_vals(req, 3112 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 3113 if (IS_ERR(context)) { 3114 rc = PTR_ERR(context); 3115 goto err_out2; 3116 } else if (context) { 3117 ksmbd_debug(SMB, 3118 "get query maximal access context\n"); 3119 maximal_access_ctxt = 1; 3120 } 3121 3122 context = smb2_find_context_vals(req, 3123 SMB2_CREATE_TIMEWARP_REQUEST, 4); 3124 if (IS_ERR(context)) { 3125 rc = PTR_ERR(context); 3126 goto err_out2; 3127 } else if (context) { 3128 ksmbd_debug(SMB, "get timewarp context\n"); 3129 rc = -EBADF; 3130 goto err_out2; 3131 } 3132 } 3133 3134 if (ksmbd_override_fsids(work)) { 3135 rc = -ENOMEM; 3136 goto err_out2; 3137 } 3138 3139 rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, 3140 &path, 1); 3141 if (!rc) { 3142 file_present = true; 3143 3144 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 3145 /* 3146 * If file exists with under flags, return access 3147 * denied error. 3148 */ 3149 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 3150 req->CreateDisposition == FILE_OPEN_IF_LE) { 3151 rc = -EACCES; 3152 goto err_out; 3153 } 3154 3155 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3156 ksmbd_debug(SMB, 3157 "User does not have write permission\n"); 3158 rc = -EACCES; 3159 goto err_out; 3160 } 3161 } else if (d_is_symlink(path.dentry)) { 3162 rc = -EACCES; 3163 goto err_out; 3164 } 3165 3166 idmap = mnt_idmap(path.mnt); 3167 } else { 3168 if (rc != -ENOENT) 3169 goto err_out; 3170 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 3171 name, rc); 3172 rc = 0; 3173 } 3174 3175 if (stream_name) { 3176 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3177 if (s_type == DATA_STREAM) { 3178 rc = -EIO; 3179 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3180 } 3181 } else { 3182 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 3183 s_type == DATA_STREAM) { 3184 rc = -EIO; 3185 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3186 } 3187 } 3188 3189 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 3190 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 3191 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3192 rc = -EIO; 3193 } 3194 3195 if (rc < 0) 3196 goto err_out; 3197 } 3198 3199 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 3200 S_ISDIR(d_inode(path.dentry)->i_mode) && 3201 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3202 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 3203 name, req->CreateOptions); 3204 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3205 rc = -EIO; 3206 goto err_out; 3207 } 3208 3209 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 3210 !(req->CreateDisposition == FILE_CREATE_LE) && 3211 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 3212 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3213 rc = -EIO; 3214 goto err_out; 3215 } 3216 3217 if (!stream_name && file_present && 3218 req->CreateDisposition == FILE_CREATE_LE) { 3219 rc = -EEXIST; 3220 goto err_out; 3221 } 3222 3223 daccess = smb_map_generic_desired_access(req->DesiredAccess); 3224 3225 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3226 rc = smb_check_perm_dacl(conn, &path, &daccess, 3227 sess->user->uid); 3228 if (rc) 3229 goto err_out; 3230 } 3231 3232 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 3233 if (!file_present) { 3234 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 3235 } else { 3236 ksmbd_vfs_query_maximal_access(idmap, 3237 path.dentry, 3238 &daccess); 3239 already_permitted = true; 3240 } 3241 maximal_access = daccess; 3242 } 3243 3244 open_flags = smb2_create_open_flags(file_present, daccess, 3245 req->CreateDisposition, 3246 &may_flags, 3247 req->CreateOptions, 3248 file_present ? d_inode(path.dentry)->i_mode : 0); 3249 3250 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3251 if (open_flags & (O_CREAT | O_TRUNC)) { 3252 ksmbd_debug(SMB, 3253 "User does not have write permission\n"); 3254 rc = -EACCES; 3255 goto err_out; 3256 } 3257 } 3258 3259 /*create file if not present */ 3260 if (!file_present) { 3261 rc = smb2_creat(work, &path, name, open_flags, 3262 posix_mode, 3263 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 3264 if (rc) { 3265 if (rc == -ENOENT) { 3266 rc = -EIO; 3267 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 3268 } 3269 goto err_out; 3270 } 3271 3272 created = true; 3273 idmap = mnt_idmap(path.mnt); 3274 if (ea_buf) { 3275 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3276 sizeof(struct smb2_ea_info)) { 3277 rc = -EINVAL; 3278 goto err_out; 3279 } 3280 3281 rc = smb2_set_ea(&ea_buf->ea, 3282 le32_to_cpu(ea_buf->ccontext.DataLength), 3283 &path, false); 3284 if (rc == -EOPNOTSUPP) 3285 rc = 0; 3286 else if (rc) 3287 goto err_out; 3288 } 3289 } else if (!already_permitted) { 3290 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3291 * because execute(search) permission on a parent directory, 3292 * is already granted. 3293 */ 3294 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3295 rc = inode_permission(idmap, 3296 d_inode(path.dentry), 3297 may_flags); 3298 if (rc) 3299 goto err_out; 3300 3301 if ((daccess & FILE_DELETE_LE) || 3302 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3303 rc = inode_permission(idmap, 3304 d_inode(path.dentry->d_parent), 3305 MAY_EXEC | MAY_WRITE); 3306 if (rc) 3307 goto err_out; 3308 } 3309 } 3310 } 3311 3312 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3313 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3314 rc = -EBUSY; 3315 goto err_out; 3316 } 3317 3318 rc = 0; 3319 filp = dentry_open(&path, open_flags, current_cred()); 3320 if (IS_ERR(filp)) { 3321 rc = PTR_ERR(filp); 3322 pr_err("dentry open for dir failed, rc %d\n", rc); 3323 goto err_out; 3324 } 3325 3326 if (file_present) { 3327 if (!(open_flags & O_TRUNC)) 3328 file_info = FILE_OPENED; 3329 else 3330 file_info = FILE_OVERWRITTEN; 3331 3332 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3333 FILE_SUPERSEDE_LE) 3334 file_info = FILE_SUPERSEDED; 3335 } else if (open_flags & O_CREAT) { 3336 file_info = FILE_CREATED; 3337 } 3338 3339 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3340 3341 /* Obtain Volatile-ID */ 3342 fp = ksmbd_open_fd(work, filp); 3343 if (IS_ERR(fp)) { 3344 fput(filp); 3345 rc = PTR_ERR(fp); 3346 fp = NULL; 3347 goto err_out; 3348 } 3349 3350 /* Get Persistent-ID */ 3351 ksmbd_open_durable_fd(fp); 3352 if (!has_file_id(fp->persistent_id)) { 3353 rc = -ENOMEM; 3354 goto err_out; 3355 } 3356 3357 fp->cdoption = req->CreateDisposition; 3358 fp->daccess = daccess; 3359 fp->saccess = req->ShareAccess; 3360 fp->coption = req->CreateOptions; 3361 3362 /* Set default windows and posix acls if creating new file */ 3363 if (created) { 3364 int posix_acl_rc; 3365 struct inode *inode = d_inode(path.dentry); 3366 3367 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3368 &path, 3369 d_inode(path.dentry->d_parent)); 3370 if (posix_acl_rc) 3371 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3372 3373 if (test_share_config_flag(work->tcon->share_conf, 3374 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3375 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3376 sess->user->gid); 3377 } 3378 3379 if (rc) { 3380 rc = smb2_create_sd_buffer(work, req, &path); 3381 if (rc) { 3382 if (posix_acl_rc) 3383 ksmbd_vfs_set_init_posix_acl(idmap, 3384 &path); 3385 3386 if (test_share_config_flag(work->tcon->share_conf, 3387 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3388 struct smb_fattr fattr; 3389 struct smb_ntsd *pntsd; 3390 int pntsd_size, ace_num = 0; 3391 3392 ksmbd_acls_fattr(&fattr, idmap, inode); 3393 if (fattr.cf_acls) 3394 ace_num = fattr.cf_acls->a_count; 3395 if (fattr.cf_dacls) 3396 ace_num += fattr.cf_dacls->a_count; 3397 3398 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3399 sizeof(struct smb_sid) * 3 + 3400 sizeof(struct smb_acl) + 3401 sizeof(struct smb_ace) * ace_num * 2, 3402 KSMBD_DEFAULT_GFP); 3403 if (!pntsd) { 3404 posix_acl_release(fattr.cf_acls); 3405 posix_acl_release(fattr.cf_dacls); 3406 goto err_out; 3407 } 3408 3409 rc = build_sec_desc(idmap, 3410 pntsd, NULL, 0, 3411 OWNER_SECINFO | 3412 GROUP_SECINFO | 3413 DACL_SECINFO, 3414 &pntsd_size, &fattr); 3415 posix_acl_release(fattr.cf_acls); 3416 posix_acl_release(fattr.cf_dacls); 3417 if (rc) { 3418 kfree(pntsd); 3419 goto err_out; 3420 } 3421 3422 rc = ksmbd_vfs_set_sd_xattr(conn, 3423 idmap, 3424 &path, 3425 pntsd, 3426 pntsd_size, 3427 false); 3428 kfree(pntsd); 3429 if (rc) 3430 pr_err("failed to store ntacl in xattr : %d\n", 3431 rc); 3432 } 3433 } 3434 } 3435 rc = 0; 3436 } 3437 3438 if (stream_name) { 3439 rc = smb2_set_stream_name_xattr(&path, 3440 fp, 3441 stream_name, 3442 s_type); 3443 if (rc) 3444 goto err_out; 3445 file_info = FILE_CREATED; 3446 } 3447 3448 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3449 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3450 3451 fp->is_posix_ctxt = posix_ctxt; 3452 3453 /* fp should be searchable through ksmbd_inode.m_fp_list 3454 * after daccess, saccess, attrib_only, and stream are 3455 * initialized. 3456 */ 3457 down_write(&fp->f_ci->m_lock); 3458 list_add(&fp->node, &fp->f_ci->m_fp_list); 3459 up_write(&fp->f_ci->m_lock); 3460 3461 /* Check delete pending among previous fp before oplock break */ 3462 if (ksmbd_inode_pending_delete(fp)) { 3463 rc = -EBUSY; 3464 goto err_out; 3465 } 3466 3467 if (file_present || created) 3468 path_put(&path); 3469 3470 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3471 !fp->attrib_only && !stream_name) { 3472 smb_break_all_oplock(work, fp); 3473 need_truncate = 1; 3474 } 3475 3476 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3477 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3478 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3479 !(conn->vals->req_capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3480 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3481 rc = share_ret; 3482 goto err_out1; 3483 } 3484 } else { 3485 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { 3486 if (S_ISDIR(file_inode(filp)->i_mode)) { 3487 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; 3488 lc->is_dir = true; 3489 } 3490 3491 /* 3492 * Compare parent lease using parent key. If there is no 3493 * a lease that has same parent key, Send lease break 3494 * notification. 3495 */ 3496 smb_send_parent_lease_break_noti(fp, lc); 3497 3498 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3499 ksmbd_debug(SMB, 3500 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3501 name, req_op_level, lc->req_state); 3502 rc = find_same_lease_key(sess, fp->f_ci, lc); 3503 if (rc) 3504 goto err_out1; 3505 } else if (open_flags == O_RDONLY && 3506 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3507 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3508 req_op_level = SMB2_OPLOCK_LEVEL_II; 3509 3510 rc = smb_grant_oplock(work, req_op_level, 3511 fp->persistent_id, fp, 3512 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3513 lc, share_ret); 3514 if (rc < 0) 3515 goto err_out1; 3516 } 3517 3518 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3519 ksmbd_fd_set_delete_on_close(fp, file_info); 3520 3521 if (need_truncate) { 3522 rc = smb2_create_truncate(&fp->filp->f_path); 3523 if (rc) 3524 goto err_out1; 3525 } 3526 3527 if (req->CreateContextsOffset) { 3528 struct create_alloc_size_req *az_req; 3529 3530 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3531 SMB2_CREATE_ALLOCATION_SIZE, 4); 3532 if (IS_ERR(az_req)) { 3533 rc = PTR_ERR(az_req); 3534 goto err_out1; 3535 } else if (az_req) { 3536 loff_t alloc_size; 3537 int err; 3538 3539 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3540 le32_to_cpu(az_req->ccontext.DataLength) < 3541 sizeof(struct create_alloc_size_req)) { 3542 rc = -EINVAL; 3543 goto err_out1; 3544 } 3545 alloc_size = le64_to_cpu(az_req->AllocationSize); 3546 ksmbd_debug(SMB, 3547 "request smb2 create allocate size : %llu\n", 3548 alloc_size); 3549 smb_break_all_levII_oplock(work, fp, 1); 3550 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3551 alloc_size); 3552 if (err < 0) 3553 ksmbd_debug(SMB, 3554 "vfs_fallocate is failed : %d\n", 3555 err); 3556 } 3557 3558 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3559 if (IS_ERR(context)) { 3560 rc = PTR_ERR(context); 3561 goto err_out1; 3562 } else if (context) { 3563 ksmbd_debug(SMB, "get query on disk id context\n"); 3564 query_disk_id = 1; 3565 } 3566 3567 if (conn->is_aapl == false) { 3568 context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); 3569 if (IS_ERR(context)) { 3570 rc = PTR_ERR(context); 3571 goto err_out1; 3572 } else if (context) 3573 conn->is_aapl = true; 3574 } 3575 } 3576 3577 rc = ksmbd_vfs_getattr(&path, &stat); 3578 if (rc) 3579 goto err_out1; 3580 3581 if (stat.result_mask & STATX_BTIME) 3582 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3583 else 3584 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3585 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3586 fp->f_ci->m_fattr = 3587 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3588 3589 if (!created) 3590 smb2_update_xattrs(tcon, &path, fp); 3591 else 3592 smb2_new_xattrs(tcon, &path, fp); 3593 3594 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3595 3596 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { 3597 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && 3598 test_share_config_flag(work->tcon->share_conf, 3599 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 3600 fp->is_persistent = true; 3601 else 3602 fp->is_durable = true; 3603 3604 if (dh_info.type == DURABLE_REQ_V2) { 3605 memcpy(fp->create_guid, dh_info.CreateGuid, 3606 SMB2_CREATE_GUID_SIZE); 3607 if (dh_info.timeout) 3608 fp->durable_timeout = 3609 min_t(unsigned int, dh_info.timeout, 3610 DURABLE_HANDLE_MAX_TIMEOUT); 3611 else 3612 fp->durable_timeout = 60; 3613 } 3614 } 3615 3616 reconnected_fp: 3617 rsp->StructureSize = cpu_to_le16(89); 3618 rcu_read_lock(); 3619 opinfo = rcu_dereference(fp->f_opinfo); 3620 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3621 rcu_read_unlock(); 3622 rsp->Flags = 0; 3623 rsp->CreateAction = cpu_to_le32(file_info); 3624 rsp->CreationTime = cpu_to_le64(fp->create_time); 3625 time = ksmbd_UnixTimeToNT(stat.atime); 3626 rsp->LastAccessTime = cpu_to_le64(time); 3627 time = ksmbd_UnixTimeToNT(stat.mtime); 3628 rsp->LastWriteTime = cpu_to_le64(time); 3629 time = ksmbd_UnixTimeToNT(stat.ctime); 3630 rsp->ChangeTime = cpu_to_le64(time); 3631 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3632 cpu_to_le64(stat.blocks << 9); 3633 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3634 rsp->FileAttributes = fp->f_ci->m_fattr; 3635 3636 rsp->Reserved2 = 0; 3637 3638 rsp->PersistentFileId = fp->persistent_id; 3639 rsp->VolatileFileId = fp->volatile_id; 3640 3641 rsp->CreateContextsOffset = 0; 3642 rsp->CreateContextsLength = 0; 3643 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3644 3645 /* If lease is request send lease context response */ 3646 if (opinfo && opinfo->is_lease) { 3647 struct create_context *lease_ccontext; 3648 3649 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3650 name, opinfo->o_lease->state); 3651 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3652 3653 lease_ccontext = (struct create_context *)rsp->Buffer; 3654 contxt_cnt++; 3655 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3656 le32_add_cpu(&rsp->CreateContextsLength, 3657 conn->vals->create_lease_size); 3658 iov_len += conn->vals->create_lease_size; 3659 next_ptr = &lease_ccontext->Next; 3660 next_off = conn->vals->create_lease_size; 3661 } 3662 3663 if (maximal_access_ctxt) { 3664 struct create_context *mxac_ccontext; 3665 3666 if (maximal_access == 0) 3667 ksmbd_vfs_query_maximal_access(idmap, 3668 path.dentry, 3669 &maximal_access); 3670 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3671 le32_to_cpu(rsp->CreateContextsLength)); 3672 contxt_cnt++; 3673 create_mxac_rsp_buf(rsp->Buffer + 3674 le32_to_cpu(rsp->CreateContextsLength), 3675 le32_to_cpu(maximal_access)); 3676 le32_add_cpu(&rsp->CreateContextsLength, 3677 conn->vals->create_mxac_size); 3678 iov_len += conn->vals->create_mxac_size; 3679 if (next_ptr) 3680 *next_ptr = cpu_to_le32(next_off); 3681 next_ptr = &mxac_ccontext->Next; 3682 next_off = conn->vals->create_mxac_size; 3683 } 3684 3685 if (query_disk_id) { 3686 struct create_context *disk_id_ccontext; 3687 3688 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3689 le32_to_cpu(rsp->CreateContextsLength)); 3690 contxt_cnt++; 3691 create_disk_id_rsp_buf(rsp->Buffer + 3692 le32_to_cpu(rsp->CreateContextsLength), 3693 stat.ino, tcon->id); 3694 le32_add_cpu(&rsp->CreateContextsLength, 3695 conn->vals->create_disk_id_size); 3696 iov_len += conn->vals->create_disk_id_size; 3697 if (next_ptr) 3698 *next_ptr = cpu_to_le32(next_off); 3699 next_ptr = &disk_id_ccontext->Next; 3700 next_off = conn->vals->create_disk_id_size; 3701 } 3702 3703 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { 3704 struct create_context *durable_ccontext; 3705 3706 durable_ccontext = (struct create_context *)(rsp->Buffer + 3707 le32_to_cpu(rsp->CreateContextsLength)); 3708 contxt_cnt++; 3709 if (dh_info.type == DURABLE_REQ) { 3710 create_durable_rsp_buf(rsp->Buffer + 3711 le32_to_cpu(rsp->CreateContextsLength)); 3712 le32_add_cpu(&rsp->CreateContextsLength, 3713 conn->vals->create_durable_size); 3714 iov_len += conn->vals->create_durable_size; 3715 } else { 3716 create_durable_v2_rsp_buf(rsp->Buffer + 3717 le32_to_cpu(rsp->CreateContextsLength), 3718 fp); 3719 le32_add_cpu(&rsp->CreateContextsLength, 3720 conn->vals->create_durable_v2_size); 3721 iov_len += conn->vals->create_durable_v2_size; 3722 } 3723 3724 if (next_ptr) 3725 *next_ptr = cpu_to_le32(next_off); 3726 next_ptr = &durable_ccontext->Next; 3727 next_off = conn->vals->create_durable_size; 3728 } 3729 3730 if (posix_ctxt) { 3731 contxt_cnt++; 3732 create_posix_rsp_buf(rsp->Buffer + 3733 le32_to_cpu(rsp->CreateContextsLength), 3734 fp); 3735 le32_add_cpu(&rsp->CreateContextsLength, 3736 conn->vals->create_posix_size); 3737 iov_len += conn->vals->create_posix_size; 3738 if (next_ptr) 3739 *next_ptr = cpu_to_le32(next_off); 3740 } 3741 3742 if (contxt_cnt > 0) { 3743 rsp->CreateContextsOffset = 3744 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3745 } 3746 3747 err_out: 3748 if (rc && (file_present || created)) 3749 path_put(&path); 3750 3751 err_out1: 3752 ksmbd_revert_fsids(work); 3753 3754 err_out2: 3755 if (!rc) { 3756 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3757 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3758 } 3759 if (rc) { 3760 if (rc == -EINVAL) 3761 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3762 else if (rc == -EOPNOTSUPP) 3763 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3764 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3765 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3766 else if (rc == -ENOENT) 3767 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3768 else if (rc == -EPERM) 3769 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3770 else if (rc == -EBUSY) 3771 rsp->hdr.Status = STATUS_DELETE_PENDING; 3772 else if (rc == -EBADF) 3773 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3774 else if (rc == -ENOEXEC) 3775 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3776 else if (rc == -ENXIO) 3777 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3778 else if (rc == -EEXIST) 3779 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3780 else if (rc == -EMFILE) 3781 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3782 if (!rsp->hdr.Status) 3783 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3784 3785 if (fp) 3786 ksmbd_fd_put(work, fp); 3787 smb2_set_err_rsp(work); 3788 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3789 } 3790 3791 kfree(name); 3792 kfree(lc); 3793 3794 return rc; 3795 } 3796 3797 static int readdir_info_level_struct_sz(int info_level) 3798 { 3799 switch (info_level) { 3800 case FILE_FULL_DIRECTORY_INFORMATION: 3801 return sizeof(FILE_FULL_DIRECTORY_INFO); 3802 case FILE_BOTH_DIRECTORY_INFORMATION: 3803 return sizeof(FILE_BOTH_DIRECTORY_INFO); 3804 case FILE_DIRECTORY_INFORMATION: 3805 return sizeof(FILE_DIRECTORY_INFO); 3806 case FILE_NAMES_INFORMATION: 3807 return sizeof(struct file_names_info); 3808 case FILEID_FULL_DIRECTORY_INFORMATION: 3809 return sizeof(FILE_ID_FULL_DIR_INFO); 3810 case FILEID_BOTH_DIRECTORY_INFORMATION: 3811 return sizeof(struct file_id_both_directory_info); 3812 case SMB_FIND_FILE_POSIX_INFO: 3813 return sizeof(struct smb2_posix_info); 3814 default: 3815 return -EOPNOTSUPP; 3816 } 3817 } 3818 3819 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3820 { 3821 switch (info_level) { 3822 case FILE_FULL_DIRECTORY_INFORMATION: 3823 { 3824 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3825 3826 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->rptr; 3827 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3828 d_info->name = ffdinfo->FileName; 3829 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3830 return 0; 3831 } 3832 case FILE_BOTH_DIRECTORY_INFORMATION: 3833 { 3834 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3835 3836 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->rptr; 3837 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3838 d_info->name = fbdinfo->FileName; 3839 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3840 return 0; 3841 } 3842 case FILE_DIRECTORY_INFORMATION: 3843 { 3844 FILE_DIRECTORY_INFO *fdinfo; 3845 3846 fdinfo = (FILE_DIRECTORY_INFO *)d_info->rptr; 3847 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3848 d_info->name = fdinfo->FileName; 3849 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3850 return 0; 3851 } 3852 case FILE_NAMES_INFORMATION: 3853 { 3854 struct file_names_info *fninfo; 3855 3856 fninfo = (struct file_names_info *)d_info->rptr; 3857 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3858 d_info->name = fninfo->FileName; 3859 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3860 return 0; 3861 } 3862 case FILEID_FULL_DIRECTORY_INFORMATION: 3863 { 3864 FILE_ID_FULL_DIR_INFO *dinfo; 3865 3866 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->rptr; 3867 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3868 d_info->name = dinfo->FileName; 3869 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3870 return 0; 3871 } 3872 case FILEID_BOTH_DIRECTORY_INFORMATION: 3873 { 3874 struct file_id_both_directory_info *fibdinfo; 3875 3876 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3877 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3878 d_info->name = fibdinfo->FileName; 3879 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3880 return 0; 3881 } 3882 case SMB_FIND_FILE_POSIX_INFO: 3883 { 3884 struct smb2_posix_info *posix_info; 3885 3886 posix_info = (struct smb2_posix_info *)d_info->rptr; 3887 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3888 d_info->name = posix_info->name; 3889 d_info->name_len = le32_to_cpu(posix_info->name_len); 3890 return 0; 3891 } 3892 default: 3893 return -EINVAL; 3894 } 3895 } 3896 3897 /** 3898 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3899 * buffer 3900 * @conn: connection instance 3901 * @info_level: smb information level 3902 * @d_info: structure included variables for query dir 3903 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3904 * 3905 * if directory has many entries, find first can't read it fully. 3906 * find next might be called multiple times to read remaining dir entries 3907 * 3908 * Return: 0 on success, otherwise error 3909 */ 3910 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3911 struct ksmbd_dir_info *d_info, 3912 struct ksmbd_kstat *ksmbd_kstat) 3913 { 3914 int next_entry_offset = 0; 3915 char *conv_name; 3916 int conv_len; 3917 void *kstat; 3918 int struct_sz, rc = 0; 3919 3920 conv_name = ksmbd_convert_dir_info_name(d_info, 3921 conn->local_nls, 3922 &conv_len); 3923 if (!conv_name) 3924 return -ENOMEM; 3925 3926 /* Somehow the name has only terminating NULL bytes */ 3927 if (conv_len < 0) { 3928 rc = -EINVAL; 3929 goto free_conv_name; 3930 } 3931 3932 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3933 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3934 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3935 3936 if (next_entry_offset > d_info->out_buf_len) { 3937 d_info->out_buf_len = 0; 3938 rc = -ENOSPC; 3939 goto free_conv_name; 3940 } 3941 3942 kstat = d_info->wptr; 3943 if (info_level != FILE_NAMES_INFORMATION) 3944 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3945 3946 switch (info_level) { 3947 case FILE_FULL_DIRECTORY_INFORMATION: 3948 { 3949 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3950 3951 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)kstat; 3952 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3953 ffdinfo->EaSize = 3954 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3955 if (ffdinfo->EaSize) 3956 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3957 if (d_info->hide_dot_file && d_info->name[0] == '.') 3958 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3959 memcpy(ffdinfo->FileName, conv_name, conv_len); 3960 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3961 break; 3962 } 3963 case FILE_BOTH_DIRECTORY_INFORMATION: 3964 { 3965 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3966 3967 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)kstat; 3968 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3969 fbdinfo->EaSize = 3970 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3971 if (fbdinfo->EaSize) 3972 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3973 fbdinfo->ShortNameLength = 0; 3974 fbdinfo->Reserved = 0; 3975 if (d_info->hide_dot_file && d_info->name[0] == '.') 3976 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3977 memcpy(fbdinfo->FileName, conv_name, conv_len); 3978 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3979 break; 3980 } 3981 case FILE_DIRECTORY_INFORMATION: 3982 { 3983 FILE_DIRECTORY_INFO *fdinfo; 3984 3985 fdinfo = (FILE_DIRECTORY_INFO *)kstat; 3986 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3987 if (d_info->hide_dot_file && d_info->name[0] == '.') 3988 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3989 memcpy(fdinfo->FileName, conv_name, conv_len); 3990 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3991 break; 3992 } 3993 case FILE_NAMES_INFORMATION: 3994 { 3995 struct file_names_info *fninfo; 3996 3997 fninfo = (struct file_names_info *)kstat; 3998 fninfo->FileNameLength = cpu_to_le32(conv_len); 3999 memcpy(fninfo->FileName, conv_name, conv_len); 4000 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4001 break; 4002 } 4003 case FILEID_FULL_DIRECTORY_INFORMATION: 4004 { 4005 FILE_ID_FULL_DIR_INFO *dinfo; 4006 4007 dinfo = (FILE_ID_FULL_DIR_INFO *)kstat; 4008 dinfo->FileNameLength = cpu_to_le32(conv_len); 4009 dinfo->EaSize = 4010 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4011 if (dinfo->EaSize) 4012 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4013 dinfo->Reserved = 0; 4014 if (conn->is_aapl) 4015 dinfo->UniqueId = 0; 4016 else 4017 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4018 if (d_info->hide_dot_file && d_info->name[0] == '.') 4019 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4020 memcpy(dinfo->FileName, conv_name, conv_len); 4021 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4022 break; 4023 } 4024 case FILEID_BOTH_DIRECTORY_INFORMATION: 4025 { 4026 struct file_id_both_directory_info *fibdinfo; 4027 4028 fibdinfo = (struct file_id_both_directory_info *)kstat; 4029 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 4030 fibdinfo->EaSize = 4031 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4032 if (fibdinfo->EaSize) 4033 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4034 if (conn->is_aapl) 4035 fibdinfo->UniqueId = 0; 4036 else 4037 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4038 fibdinfo->ShortNameLength = 0; 4039 fibdinfo->Reserved = 0; 4040 fibdinfo->Reserved2 = cpu_to_le16(0); 4041 if (d_info->hide_dot_file && d_info->name[0] == '.') 4042 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4043 memcpy(fibdinfo->FileName, conv_name, conv_len); 4044 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4045 break; 4046 } 4047 case SMB_FIND_FILE_POSIX_INFO: 4048 { 4049 struct smb2_posix_info *posix_info; 4050 u64 time; 4051 4052 posix_info = (struct smb2_posix_info *)kstat; 4053 posix_info->Ignored = 0; 4054 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 4055 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 4056 posix_info->ChangeTime = cpu_to_le64(time); 4057 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 4058 posix_info->LastAccessTime = cpu_to_le64(time); 4059 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 4060 posix_info->LastWriteTime = cpu_to_le64(time); 4061 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 4062 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 4063 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 4064 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 4065 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 4066 switch (ksmbd_kstat->kstat->mode & S_IFMT) { 4067 case S_IFDIR: 4068 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 4069 break; 4070 case S_IFLNK: 4071 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 4072 break; 4073 case S_IFCHR: 4074 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 4075 break; 4076 case S_IFBLK: 4077 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 4078 break; 4079 case S_IFIFO: 4080 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 4081 break; 4082 case S_IFSOCK: 4083 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 4084 } 4085 4086 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 4087 posix_info->DosAttributes = 4088 S_ISDIR(ksmbd_kstat->kstat->mode) ? 4089 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 4090 if (d_info->hide_dot_file && d_info->name[0] == '.') 4091 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4092 /* 4093 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4094 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4095 * sub_auth(4 * 1(num_subauth)) + RID(4). 4096 */ 4097 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 4098 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 4099 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 4100 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 4101 memcpy(posix_info->name, conv_name, conv_len); 4102 posix_info->name_len = cpu_to_le32(conv_len); 4103 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 4104 break; 4105 } 4106 4107 } /* switch (info_level) */ 4108 4109 d_info->last_entry_offset = d_info->data_count; 4110 d_info->data_count += next_entry_offset; 4111 d_info->out_buf_len -= next_entry_offset; 4112 d_info->wptr += next_entry_offset; 4113 4114 ksmbd_debug(SMB, 4115 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 4116 info_level, d_info->out_buf_len, 4117 next_entry_offset, d_info->data_count); 4118 4119 free_conv_name: 4120 kfree(conv_name); 4121 return rc; 4122 } 4123 4124 struct smb2_query_dir_private { 4125 struct ksmbd_work *work; 4126 char *search_pattern; 4127 struct ksmbd_file *dir_fp; 4128 4129 struct ksmbd_dir_info *d_info; 4130 int info_level; 4131 }; 4132 4133 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 4134 { 4135 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 4136 struct kstat kstat; 4137 struct ksmbd_kstat ksmbd_kstat; 4138 int rc; 4139 int i; 4140 4141 for (i = 0; i < priv->d_info->num_entry; i++) { 4142 struct dentry *dent; 4143 4144 if (dentry_name(priv->d_info, priv->info_level)) 4145 return -EINVAL; 4146 4147 dent = lookup_one_unlocked(idmap, 4148 &QSTR_LEN(priv->d_info->name, 4149 priv->d_info->name_len), 4150 priv->dir_fp->filp->f_path.dentry); 4151 4152 if (IS_ERR(dent)) { 4153 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 4154 priv->d_info->name, 4155 PTR_ERR(dent)); 4156 continue; 4157 } 4158 if (unlikely(d_is_negative(dent))) { 4159 dput(dent); 4160 ksmbd_debug(SMB, "Negative dentry `%s'\n", 4161 priv->d_info->name); 4162 continue; 4163 } 4164 4165 ksmbd_kstat.kstat = &kstat; 4166 if (priv->info_level != FILE_NAMES_INFORMATION) { 4167 rc = ksmbd_vfs_fill_dentry_attrs(priv->work, 4168 idmap, 4169 dent, 4170 &ksmbd_kstat); 4171 if (rc) { 4172 dput(dent); 4173 continue; 4174 } 4175 } 4176 4177 rc = smb2_populate_readdir_entry(priv->work->conn, 4178 priv->info_level, 4179 priv->d_info, 4180 &ksmbd_kstat); 4181 dput(dent); 4182 if (rc) 4183 return rc; 4184 } 4185 return 0; 4186 } 4187 4188 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 4189 int info_level) 4190 { 4191 int struct_sz; 4192 int conv_len; 4193 int next_entry_offset; 4194 4195 struct_sz = readdir_info_level_struct_sz(info_level); 4196 if (struct_sz == -EOPNOTSUPP) 4197 return -EOPNOTSUPP; 4198 4199 conv_len = (d_info->name_len + 1) * 2; 4200 next_entry_offset = ALIGN(struct_sz + conv_len, 4201 KSMBD_DIR_INFO_ALIGNMENT); 4202 4203 if (next_entry_offset > d_info->out_buf_len) { 4204 d_info->out_buf_len = 0; 4205 return -ENOSPC; 4206 } 4207 4208 switch (info_level) { 4209 case FILE_FULL_DIRECTORY_INFORMATION: 4210 { 4211 FILE_FULL_DIRECTORY_INFO *ffdinfo; 4212 4213 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->wptr; 4214 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 4215 ffdinfo->FileName[d_info->name_len] = 0x00; 4216 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4217 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4218 break; 4219 } 4220 case FILE_BOTH_DIRECTORY_INFORMATION: 4221 { 4222 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 4223 4224 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->wptr; 4225 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 4226 fbdinfo->FileName[d_info->name_len] = 0x00; 4227 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4228 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4229 break; 4230 } 4231 case FILE_DIRECTORY_INFORMATION: 4232 { 4233 FILE_DIRECTORY_INFO *fdinfo; 4234 4235 fdinfo = (FILE_DIRECTORY_INFO *)d_info->wptr; 4236 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 4237 fdinfo->FileName[d_info->name_len] = 0x00; 4238 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4239 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4240 break; 4241 } 4242 case FILE_NAMES_INFORMATION: 4243 { 4244 struct file_names_info *fninfo; 4245 4246 fninfo = (struct file_names_info *)d_info->wptr; 4247 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 4248 fninfo->FileName[d_info->name_len] = 0x00; 4249 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 4250 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4251 break; 4252 } 4253 case FILEID_FULL_DIRECTORY_INFORMATION: 4254 { 4255 FILE_ID_FULL_DIR_INFO *dinfo; 4256 4257 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->wptr; 4258 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 4259 dinfo->FileName[d_info->name_len] = 0x00; 4260 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4261 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4262 break; 4263 } 4264 case FILEID_BOTH_DIRECTORY_INFORMATION: 4265 { 4266 struct file_id_both_directory_info *fibdinfo; 4267 4268 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 4269 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 4270 fibdinfo->FileName[d_info->name_len] = 0x00; 4271 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4272 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4273 break; 4274 } 4275 case SMB_FIND_FILE_POSIX_INFO: 4276 { 4277 struct smb2_posix_info *posix_info; 4278 4279 posix_info = (struct smb2_posix_info *)d_info->wptr; 4280 memcpy(posix_info->name, d_info->name, d_info->name_len); 4281 posix_info->name[d_info->name_len] = 0x00; 4282 posix_info->name_len = cpu_to_le32(d_info->name_len); 4283 posix_info->NextEntryOffset = 4284 cpu_to_le32(next_entry_offset); 4285 break; 4286 } 4287 } /* switch (info_level) */ 4288 4289 d_info->num_entry++; 4290 d_info->out_buf_len -= next_entry_offset; 4291 d_info->wptr += next_entry_offset; 4292 return 0; 4293 } 4294 4295 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 4296 loff_t offset, u64 ino, unsigned int d_type) 4297 { 4298 struct ksmbd_readdir_data *buf; 4299 struct smb2_query_dir_private *priv; 4300 struct ksmbd_dir_info *d_info; 4301 int rc; 4302 4303 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 4304 priv = buf->private; 4305 d_info = priv->d_info; 4306 4307 /* dot and dotdot entries are already reserved */ 4308 if (!strcmp(".", name) || !strcmp("..", name)) 4309 return true; 4310 d_info->num_scan++; 4311 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 4312 return true; 4313 if (!match_pattern(name, namlen, priv->search_pattern)) 4314 return true; 4315 4316 d_info->name = name; 4317 d_info->name_len = namlen; 4318 rc = reserve_populate_dentry(d_info, priv->info_level); 4319 if (rc) 4320 return false; 4321 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 4322 d_info->out_buf_len = 0; 4323 return true; 4324 } 4325 4326 static int verify_info_level(int info_level) 4327 { 4328 switch (info_level) { 4329 case FILE_FULL_DIRECTORY_INFORMATION: 4330 case FILE_BOTH_DIRECTORY_INFORMATION: 4331 case FILE_DIRECTORY_INFORMATION: 4332 case FILE_NAMES_INFORMATION: 4333 case FILEID_FULL_DIRECTORY_INFORMATION: 4334 case FILEID_BOTH_DIRECTORY_INFORMATION: 4335 case SMB_FIND_FILE_POSIX_INFO: 4336 break; 4337 default: 4338 return -EOPNOTSUPP; 4339 } 4340 4341 return 0; 4342 } 4343 4344 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4345 { 4346 int free_len; 4347 4348 free_len = (int)(work->response_sz - 4349 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4350 return free_len; 4351 } 4352 4353 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4354 unsigned short hdr2_len, 4355 unsigned int out_buf_len) 4356 { 4357 int free_len; 4358 4359 if (out_buf_len > work->conn->vals->max_trans_size) 4360 return -EINVAL; 4361 4362 free_len = smb2_resp_buf_len(work, hdr2_len); 4363 if (free_len < 0) 4364 return -EINVAL; 4365 4366 return min_t(int, out_buf_len, free_len); 4367 } 4368 4369 int smb2_query_dir(struct ksmbd_work *work) 4370 { 4371 struct ksmbd_conn *conn = work->conn; 4372 struct smb2_query_directory_req *req; 4373 struct smb2_query_directory_rsp *rsp; 4374 struct ksmbd_share_config *share = work->tcon->share_conf; 4375 struct ksmbd_file *dir_fp = NULL; 4376 struct ksmbd_dir_info d_info; 4377 int rc = 0; 4378 char *srch_ptr = NULL; 4379 unsigned char srch_flag; 4380 int buffer_sz; 4381 struct smb2_query_dir_private query_dir_private = {NULL, }; 4382 4383 ksmbd_debug(SMB, "Received smb2 query directory request\n"); 4384 4385 WORK_BUFFERS(work, req, rsp); 4386 4387 if (ksmbd_override_fsids(work)) { 4388 rsp->hdr.Status = STATUS_NO_MEMORY; 4389 smb2_set_err_rsp(work); 4390 return -ENOMEM; 4391 } 4392 4393 rc = verify_info_level(req->FileInformationClass); 4394 if (rc) { 4395 rc = -EFAULT; 4396 goto err_out2; 4397 } 4398 4399 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4400 if (!dir_fp) { 4401 rc = -EBADF; 4402 goto err_out2; 4403 } 4404 4405 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4406 inode_permission(file_mnt_idmap(dir_fp->filp), 4407 file_inode(dir_fp->filp), 4408 MAY_READ | MAY_EXEC)) { 4409 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4410 rc = -EACCES; 4411 goto err_out2; 4412 } 4413 4414 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4415 pr_err("can't do query dir for a file\n"); 4416 rc = -EINVAL; 4417 goto err_out2; 4418 } 4419 4420 srch_flag = req->Flags; 4421 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), 4422 le16_to_cpu(req->FileNameLength), 1, 4423 conn->local_nls); 4424 if (IS_ERR(srch_ptr)) { 4425 ksmbd_debug(SMB, "Search Pattern not found\n"); 4426 rc = -EINVAL; 4427 goto err_out2; 4428 } else { 4429 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4430 } 4431 4432 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4433 ksmbd_debug(SMB, "Restart directory scan\n"); 4434 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4435 } 4436 4437 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4438 d_info.wptr = (char *)rsp->Buffer; 4439 d_info.rptr = (char *)rsp->Buffer; 4440 d_info.out_buf_len = 4441 smb2_calc_max_out_buf_len(work, 8, 4442 le32_to_cpu(req->OutputBufferLength)); 4443 if (d_info.out_buf_len < 0) { 4444 rc = -EINVAL; 4445 goto err_out; 4446 } 4447 d_info.flags = srch_flag; 4448 4449 /* 4450 * reserve dot and dotdot entries in head of buffer 4451 * in first response 4452 */ 4453 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4454 dir_fp, &d_info, srch_ptr, 4455 smb2_populate_readdir_entry); 4456 if (rc == -ENOSPC) 4457 rc = 0; 4458 else if (rc) 4459 goto err_out; 4460 4461 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4462 d_info.hide_dot_file = true; 4463 4464 buffer_sz = d_info.out_buf_len; 4465 d_info.rptr = d_info.wptr; 4466 query_dir_private.work = work; 4467 query_dir_private.search_pattern = srch_ptr; 4468 query_dir_private.dir_fp = dir_fp; 4469 query_dir_private.d_info = &d_info; 4470 query_dir_private.info_level = req->FileInformationClass; 4471 dir_fp->readdir_data.private = &query_dir_private; 4472 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4473 again: 4474 d_info.num_scan = 0; 4475 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4476 /* 4477 * num_entry can be 0 if the directory iteration stops before reaching 4478 * the end of the directory and no file is matched with the search 4479 * pattern. 4480 */ 4481 if (rc >= 0 && !d_info.num_entry && d_info.num_scan && 4482 d_info.out_buf_len > 0) 4483 goto again; 4484 /* 4485 * req->OutputBufferLength is too small to contain even one entry. 4486 * In this case, it immediately returns OutputBufferLength 0 to client. 4487 */ 4488 if (!d_info.out_buf_len && !d_info.num_entry) 4489 goto no_buf_len; 4490 if (rc > 0 || rc == -ENOSPC) 4491 rc = 0; 4492 else if (rc) 4493 goto err_out; 4494 4495 d_info.wptr = d_info.rptr; 4496 d_info.out_buf_len = buffer_sz; 4497 rc = process_query_dir_entries(&query_dir_private); 4498 if (rc) 4499 goto err_out; 4500 4501 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4502 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4503 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4504 } else { 4505 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4506 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4507 } 4508 rsp->StructureSize = cpu_to_le16(9); 4509 rsp->OutputBufferOffset = cpu_to_le16(0); 4510 rsp->OutputBufferLength = cpu_to_le32(0); 4511 rsp->Buffer[0] = 0; 4512 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4513 offsetof(struct smb2_query_directory_rsp, Buffer) 4514 + 1); 4515 if (rc) 4516 goto err_out; 4517 } else { 4518 no_buf_len: 4519 ((FILE_DIRECTORY_INFO *) 4520 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4521 ->NextEntryOffset = 0; 4522 if (d_info.data_count >= d_info.last_entry_off_align) 4523 d_info.data_count -= d_info.last_entry_off_align; 4524 4525 rsp->StructureSize = cpu_to_le16(9); 4526 rsp->OutputBufferOffset = cpu_to_le16(72); 4527 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4528 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4529 offsetof(struct smb2_query_directory_rsp, Buffer) + 4530 d_info.data_count); 4531 if (rc) 4532 goto err_out; 4533 } 4534 4535 kfree(srch_ptr); 4536 ksmbd_fd_put(work, dir_fp); 4537 ksmbd_revert_fsids(work); 4538 return 0; 4539 4540 err_out: 4541 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4542 kfree(srch_ptr); 4543 4544 err_out2: 4545 if (rc == -EINVAL) 4546 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4547 else if (rc == -EACCES) 4548 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4549 else if (rc == -ENOENT) 4550 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4551 else if (rc == -EBADF) 4552 rsp->hdr.Status = STATUS_FILE_CLOSED; 4553 else if (rc == -ENOMEM) 4554 rsp->hdr.Status = STATUS_NO_MEMORY; 4555 else if (rc == -EFAULT) 4556 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4557 else if (rc == -EIO) 4558 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4559 if (!rsp->hdr.Status) 4560 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4561 4562 smb2_set_err_rsp(work); 4563 ksmbd_fd_put(work, dir_fp); 4564 ksmbd_revert_fsids(work); 4565 return rc; 4566 } 4567 4568 /** 4569 * buffer_check_err() - helper function to check buffer errors 4570 * @reqOutputBufferLength: max buffer length expected in command response 4571 * @rsp: query info response buffer contains output buffer length 4572 * @rsp_org: base response buffer pointer in case of chained response 4573 * 4574 * Return: 0 on success, otherwise error 4575 */ 4576 static int buffer_check_err(int reqOutputBufferLength, 4577 struct smb2_query_info_rsp *rsp, 4578 void *rsp_org) 4579 { 4580 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4581 pr_err("Invalid Buffer Size Requested\n"); 4582 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4583 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4584 return -EINVAL; 4585 } 4586 return 0; 4587 } 4588 4589 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4590 void *rsp_org) 4591 { 4592 struct smb2_file_standard_info *sinfo; 4593 4594 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4595 4596 sinfo->AllocationSize = cpu_to_le64(4096); 4597 sinfo->EndOfFile = cpu_to_le64(0); 4598 sinfo->NumberOfLinks = cpu_to_le32(1); 4599 sinfo->DeletePending = 1; 4600 sinfo->Directory = 0; 4601 rsp->OutputBufferLength = 4602 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4603 } 4604 4605 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4606 void *rsp_org) 4607 { 4608 struct smb2_file_internal_info *file_info; 4609 4610 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4611 4612 /* any unique number */ 4613 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4614 rsp->OutputBufferLength = 4615 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4616 } 4617 4618 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4619 struct smb2_query_info_req *req, 4620 struct smb2_query_info_rsp *rsp, 4621 void *rsp_org) 4622 { 4623 u64 id; 4624 int rc; 4625 4626 /* 4627 * Windows can sometime send query file info request on 4628 * pipe without opening it, checking error condition here 4629 */ 4630 id = req->VolatileFileId; 4631 4632 lockdep_assert_not_held(&sess->rpc_lock); 4633 4634 down_read(&sess->rpc_lock); 4635 if (!ksmbd_session_rpc_method(sess, id)) { 4636 up_read(&sess->rpc_lock); 4637 return -ENOENT; 4638 } 4639 up_read(&sess->rpc_lock); 4640 4641 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4642 req->FileInfoClass, req->VolatileFileId); 4643 4644 switch (req->FileInfoClass) { 4645 case FILE_STANDARD_INFORMATION: 4646 get_standard_info_pipe(rsp, rsp_org); 4647 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4648 rsp, rsp_org); 4649 break; 4650 case FILE_INTERNAL_INFORMATION: 4651 get_internal_info_pipe(rsp, id, rsp_org); 4652 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4653 rsp, rsp_org); 4654 break; 4655 default: 4656 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4657 req->FileInfoClass); 4658 rc = -EOPNOTSUPP; 4659 } 4660 return rc; 4661 } 4662 4663 /** 4664 * smb2_get_ea() - handler for smb2 get extended attribute command 4665 * @work: smb work containing query info command buffer 4666 * @fp: ksmbd_file pointer 4667 * @req: get extended attribute request 4668 * @rsp: response buffer pointer 4669 * @rsp_org: base response buffer pointer in case of chained response 4670 * 4671 * Return: 0 on success, otherwise error 4672 */ 4673 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4674 struct smb2_query_info_req *req, 4675 struct smb2_query_info_rsp *rsp, void *rsp_org) 4676 { 4677 struct smb2_ea_info *eainfo, *prev_eainfo; 4678 char *name, *ptr, *xattr_list = NULL, *buf; 4679 int rc, name_len, value_len, xattr_list_len, idx; 4680 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4681 struct smb2_ea_info_req *ea_req = NULL; 4682 const struct path *path; 4683 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4684 4685 if (!(fp->daccess & FILE_READ_EA_LE)) { 4686 pr_err("Not permitted to read ext attr : 0x%x\n", 4687 fp->daccess); 4688 return -EACCES; 4689 } 4690 4691 path = &fp->filp->f_path; 4692 /* single EA entry is requested with given user.* name */ 4693 if (req->InputBufferLength) { 4694 if (le32_to_cpu(req->InputBufferLength) <= 4695 sizeof(struct smb2_ea_info_req)) 4696 return -EINVAL; 4697 4698 ea_req = (struct smb2_ea_info_req *)((char *)req + 4699 le16_to_cpu(req->InputBufferOffset)); 4700 } else { 4701 /* need to send all EAs, if no specific EA is requested*/ 4702 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4703 ksmbd_debug(SMB, 4704 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4705 le32_to_cpu(req->Flags)); 4706 } 4707 4708 buf_free_len = 4709 smb2_calc_max_out_buf_len(work, 8, 4710 le32_to_cpu(req->OutputBufferLength)); 4711 if (buf_free_len < 0) 4712 return -EINVAL; 4713 4714 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4715 if (rc < 0) { 4716 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4717 goto out; 4718 } else if (!rc) { /* there is no EA in the file */ 4719 ksmbd_debug(SMB, "no ea data in the file\n"); 4720 goto done; 4721 } 4722 xattr_list_len = rc; 4723 4724 ptr = (char *)rsp->Buffer; 4725 eainfo = (struct smb2_ea_info *)ptr; 4726 prev_eainfo = eainfo; 4727 idx = 0; 4728 4729 while (idx < xattr_list_len) { 4730 name = xattr_list + idx; 4731 name_len = strlen(name); 4732 4733 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4734 idx += name_len + 1; 4735 4736 /* 4737 * CIFS does not support EA other than user.* namespace, 4738 * still keep the framework generic, to list other attrs 4739 * in future. 4740 */ 4741 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4742 continue; 4743 4744 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4745 STREAM_PREFIX_LEN)) 4746 continue; 4747 4748 if (req->InputBufferLength && 4749 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4750 ea_req->EaNameLength)) 4751 continue; 4752 4753 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4754 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4755 continue; 4756 4757 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4758 name_len -= XATTR_USER_PREFIX_LEN; 4759 4760 ptr = eainfo->name + name_len + 1; 4761 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4762 name_len + 1); 4763 /* bailout if xattr can't fit in buf_free_len */ 4764 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4765 name, &buf); 4766 if (value_len <= 0) { 4767 rc = -ENOENT; 4768 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4769 goto out; 4770 } 4771 4772 buf_free_len -= value_len; 4773 if (buf_free_len < 0) { 4774 kfree(buf); 4775 break; 4776 } 4777 4778 memcpy(ptr, buf, value_len); 4779 kfree(buf); 4780 4781 ptr += value_len; 4782 eainfo->Flags = 0; 4783 eainfo->EaNameLength = name_len; 4784 4785 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4786 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4787 name_len); 4788 else 4789 memcpy(eainfo->name, name, name_len); 4790 4791 eainfo->name[name_len] = '\0'; 4792 eainfo->EaValueLength = cpu_to_le16(value_len); 4793 next_offset = offsetof(struct smb2_ea_info, name) + 4794 name_len + 1 + value_len; 4795 4796 /* align next xattr entry at 4 byte bundary */ 4797 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4798 if (alignment_bytes) { 4799 memset(ptr, '\0', alignment_bytes); 4800 ptr += alignment_bytes; 4801 next_offset += alignment_bytes; 4802 buf_free_len -= alignment_bytes; 4803 } 4804 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4805 prev_eainfo = eainfo; 4806 eainfo = (struct smb2_ea_info *)ptr; 4807 rsp_data_cnt += next_offset; 4808 4809 if (req->InputBufferLength) { 4810 ksmbd_debug(SMB, "single entry requested\n"); 4811 break; 4812 } 4813 } 4814 4815 /* no more ea entries */ 4816 prev_eainfo->NextEntryOffset = 0; 4817 done: 4818 rc = 0; 4819 if (rsp_data_cnt == 0) 4820 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4821 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4822 out: 4823 kvfree(xattr_list); 4824 return rc; 4825 } 4826 4827 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4828 struct ksmbd_file *fp, void *rsp_org) 4829 { 4830 struct smb2_file_access_info *file_info; 4831 4832 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4833 file_info->AccessFlags = fp->daccess; 4834 rsp->OutputBufferLength = 4835 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4836 } 4837 4838 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4839 struct ksmbd_file *fp, void *rsp_org) 4840 { 4841 struct smb2_file_basic_info *basic_info; 4842 struct kstat stat; 4843 u64 time; 4844 int ret; 4845 4846 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4847 pr_err("no right to read the attributes : 0x%x\n", 4848 fp->daccess); 4849 return -EACCES; 4850 } 4851 4852 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4853 AT_STATX_SYNC_AS_STAT); 4854 if (ret) 4855 return ret; 4856 4857 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4858 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4859 time = ksmbd_UnixTimeToNT(stat.atime); 4860 basic_info->LastAccessTime = cpu_to_le64(time); 4861 time = ksmbd_UnixTimeToNT(stat.mtime); 4862 basic_info->LastWriteTime = cpu_to_le64(time); 4863 time = ksmbd_UnixTimeToNT(stat.ctime); 4864 basic_info->ChangeTime = cpu_to_le64(time); 4865 basic_info->Attributes = fp->f_ci->m_fattr; 4866 basic_info->Pad1 = 0; 4867 rsp->OutputBufferLength = 4868 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4869 return 0; 4870 } 4871 4872 static int get_file_standard_info(struct smb2_query_info_rsp *rsp, 4873 struct ksmbd_file *fp, void *rsp_org) 4874 { 4875 struct smb2_file_standard_info *sinfo; 4876 unsigned int delete_pending; 4877 struct kstat stat; 4878 int ret; 4879 4880 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4881 AT_STATX_SYNC_AS_STAT); 4882 if (ret) 4883 return ret; 4884 4885 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4886 delete_pending = ksmbd_inode_pending_delete(fp); 4887 4888 if (ksmbd_stream_fd(fp) == false) { 4889 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); 4890 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4891 } else { 4892 sinfo->AllocationSize = cpu_to_le64(fp->stream.size); 4893 sinfo->EndOfFile = cpu_to_le64(fp->stream.size); 4894 } 4895 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4896 sinfo->DeletePending = delete_pending; 4897 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4898 rsp->OutputBufferLength = 4899 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4900 4901 return 0; 4902 } 4903 4904 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4905 void *rsp_org) 4906 { 4907 struct smb2_file_alignment_info *file_info; 4908 4909 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4910 file_info->AlignmentRequirement = 0; 4911 rsp->OutputBufferLength = 4912 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4913 } 4914 4915 static int get_file_all_info(struct ksmbd_work *work, 4916 struct smb2_query_info_rsp *rsp, 4917 struct ksmbd_file *fp, 4918 void *rsp_org) 4919 { 4920 struct ksmbd_conn *conn = work->conn; 4921 struct smb2_file_all_info *file_info; 4922 unsigned int delete_pending; 4923 struct kstat stat; 4924 int conv_len; 4925 char *filename; 4926 u64 time; 4927 int ret; 4928 4929 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4930 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4931 fp->daccess); 4932 return -EACCES; 4933 } 4934 4935 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4936 if (IS_ERR(filename)) 4937 return PTR_ERR(filename); 4938 4939 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4940 AT_STATX_SYNC_AS_STAT); 4941 if (ret) { 4942 kfree(filename); 4943 return ret; 4944 } 4945 4946 ksmbd_debug(SMB, "filename = %s\n", filename); 4947 delete_pending = ksmbd_inode_pending_delete(fp); 4948 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4949 4950 file_info->CreationTime = cpu_to_le64(fp->create_time); 4951 time = ksmbd_UnixTimeToNT(stat.atime); 4952 file_info->LastAccessTime = cpu_to_le64(time); 4953 time = ksmbd_UnixTimeToNT(stat.mtime); 4954 file_info->LastWriteTime = cpu_to_le64(time); 4955 time = ksmbd_UnixTimeToNT(stat.ctime); 4956 file_info->ChangeTime = cpu_to_le64(time); 4957 file_info->Attributes = fp->f_ci->m_fattr; 4958 file_info->Pad1 = 0; 4959 if (ksmbd_stream_fd(fp) == false) { 4960 file_info->AllocationSize = 4961 cpu_to_le64(stat.blocks << 9); 4962 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4963 } else { 4964 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 4965 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 4966 } 4967 file_info->NumberOfLinks = 4968 cpu_to_le32(get_nlink(&stat) - delete_pending); 4969 file_info->DeletePending = delete_pending; 4970 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4971 file_info->Pad2 = 0; 4972 file_info->IndexNumber = cpu_to_le64(stat.ino); 4973 file_info->EASize = 0; 4974 file_info->AccessFlags = fp->daccess; 4975 if (ksmbd_stream_fd(fp) == false) 4976 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4977 else 4978 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 4979 file_info->Mode = fp->coption; 4980 file_info->AlignmentRequirement = 0; 4981 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4982 PATH_MAX, conn->local_nls, 0); 4983 conv_len *= 2; 4984 file_info->FileNameLength = cpu_to_le32(conv_len); 4985 rsp->OutputBufferLength = 4986 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4987 kfree(filename); 4988 return 0; 4989 } 4990 4991 static void get_file_alternate_info(struct ksmbd_work *work, 4992 struct smb2_query_info_rsp *rsp, 4993 struct ksmbd_file *fp, 4994 void *rsp_org) 4995 { 4996 struct ksmbd_conn *conn = work->conn; 4997 struct smb2_file_alt_name_info *file_info; 4998 struct dentry *dentry = fp->filp->f_path.dentry; 4999 int conv_len; 5000 5001 spin_lock(&dentry->d_lock); 5002 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 5003 conv_len = ksmbd_extract_shortname(conn, 5004 dentry->d_name.name, 5005 file_info->FileName); 5006 spin_unlock(&dentry->d_lock); 5007 file_info->FileNameLength = cpu_to_le32(conv_len); 5008 rsp->OutputBufferLength = 5009 cpu_to_le32(struct_size(file_info, FileName, conv_len)); 5010 } 5011 5012 static int get_file_stream_info(struct ksmbd_work *work, 5013 struct smb2_query_info_rsp *rsp, 5014 struct ksmbd_file *fp, 5015 void *rsp_org) 5016 { 5017 struct ksmbd_conn *conn = work->conn; 5018 struct smb2_file_stream_info *file_info; 5019 char *stream_name, *xattr_list = NULL, *stream_buf; 5020 struct kstat stat; 5021 const struct path *path = &fp->filp->f_path; 5022 ssize_t xattr_list_len; 5023 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 5024 int buf_free_len; 5025 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 5026 int ret; 5027 5028 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5029 AT_STATX_SYNC_AS_STAT); 5030 if (ret) 5031 return ret; 5032 5033 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 5034 5035 buf_free_len = 5036 smb2_calc_max_out_buf_len(work, 8, 5037 le32_to_cpu(req->OutputBufferLength)); 5038 if (buf_free_len < 0) 5039 goto out; 5040 5041 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 5042 if (xattr_list_len < 0) { 5043 goto out; 5044 } else if (!xattr_list_len) { 5045 ksmbd_debug(SMB, "empty xattr in the file\n"); 5046 goto out; 5047 } 5048 5049 while (idx < xattr_list_len) { 5050 stream_name = xattr_list + idx; 5051 streamlen = strlen(stream_name); 5052 idx += streamlen + 1; 5053 5054 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 5055 5056 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 5057 STREAM_PREFIX, STREAM_PREFIX_LEN)) 5058 continue; 5059 5060 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 5061 STREAM_PREFIX_LEN); 5062 streamlen = stream_name_len; 5063 5064 /* plus : size */ 5065 streamlen += 1; 5066 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP); 5067 if (!stream_buf) 5068 break; 5069 5070 streamlen = snprintf(stream_buf, streamlen + 1, 5071 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 5072 5073 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 5074 if (next > buf_free_len) { 5075 kfree(stream_buf); 5076 break; 5077 } 5078 5079 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 5080 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5081 stream_buf, streamlen, 5082 conn->local_nls, 0); 5083 streamlen *= 2; 5084 kfree(stream_buf); 5085 file_info->StreamNameLength = cpu_to_le32(streamlen); 5086 file_info->StreamSize = cpu_to_le64(stream_name_len); 5087 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 5088 5089 nbytes += next; 5090 buf_free_len -= next; 5091 file_info->NextEntryOffset = cpu_to_le32(next); 5092 } 5093 5094 out: 5095 if (!S_ISDIR(stat.mode) && 5096 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 5097 file_info = (struct smb2_file_stream_info *) 5098 &rsp->Buffer[nbytes]; 5099 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5100 "::$DATA", 7, conn->local_nls, 0); 5101 streamlen *= 2; 5102 file_info->StreamNameLength = cpu_to_le32(streamlen); 5103 file_info->StreamSize = cpu_to_le64(stat.size); 5104 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 5105 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 5106 } 5107 5108 /* last entry offset should be 0 */ 5109 file_info->NextEntryOffset = 0; 5110 kvfree(xattr_list); 5111 5112 rsp->OutputBufferLength = cpu_to_le32(nbytes); 5113 5114 return 0; 5115 } 5116 5117 static int get_file_internal_info(struct smb2_query_info_rsp *rsp, 5118 struct ksmbd_file *fp, void *rsp_org) 5119 { 5120 struct smb2_file_internal_info *file_info; 5121 struct kstat stat; 5122 int ret; 5123 5124 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5125 AT_STATX_SYNC_AS_STAT); 5126 if (ret) 5127 return ret; 5128 5129 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 5130 file_info->IndexNumber = cpu_to_le64(stat.ino); 5131 rsp->OutputBufferLength = 5132 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 5133 5134 return 0; 5135 } 5136 5137 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 5138 struct ksmbd_file *fp, void *rsp_org) 5139 { 5140 struct smb2_file_network_open_info *file_info; 5141 struct kstat stat; 5142 u64 time; 5143 int ret; 5144 5145 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5146 pr_err("no right to read the attributes : 0x%x\n", 5147 fp->daccess); 5148 return -EACCES; 5149 } 5150 5151 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5152 AT_STATX_SYNC_AS_STAT); 5153 if (ret) 5154 return ret; 5155 5156 file_info = (struct smb2_file_network_open_info *)rsp->Buffer; 5157 5158 file_info->CreationTime = cpu_to_le64(fp->create_time); 5159 time = ksmbd_UnixTimeToNT(stat.atime); 5160 file_info->LastAccessTime = cpu_to_le64(time); 5161 time = ksmbd_UnixTimeToNT(stat.mtime); 5162 file_info->LastWriteTime = cpu_to_le64(time); 5163 time = ksmbd_UnixTimeToNT(stat.ctime); 5164 file_info->ChangeTime = cpu_to_le64(time); 5165 file_info->Attributes = fp->f_ci->m_fattr; 5166 if (ksmbd_stream_fd(fp) == false) { 5167 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5168 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5169 } else { 5170 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5171 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5172 } 5173 file_info->Reserved = cpu_to_le32(0); 5174 rsp->OutputBufferLength = 5175 cpu_to_le32(sizeof(struct smb2_file_network_open_info)); 5176 return 0; 5177 } 5178 5179 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 5180 { 5181 struct smb2_file_ea_info *file_info; 5182 5183 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 5184 file_info->EASize = 0; 5185 rsp->OutputBufferLength = 5186 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 5187 } 5188 5189 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 5190 struct ksmbd_file *fp, void *rsp_org) 5191 { 5192 struct smb2_file_pos_info *file_info; 5193 5194 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 5195 if (ksmbd_stream_fd(fp) == false) 5196 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5197 else 5198 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5199 5200 rsp->OutputBufferLength = 5201 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 5202 } 5203 5204 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 5205 struct ksmbd_file *fp, void *rsp_org) 5206 { 5207 struct smb2_file_mode_info *file_info; 5208 5209 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 5210 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 5211 rsp->OutputBufferLength = 5212 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 5213 } 5214 5215 static int get_file_compression_info(struct smb2_query_info_rsp *rsp, 5216 struct ksmbd_file *fp, void *rsp_org) 5217 { 5218 struct smb2_file_comp_info *file_info; 5219 struct kstat stat; 5220 int ret; 5221 5222 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5223 AT_STATX_SYNC_AS_STAT); 5224 if (ret) 5225 return ret; 5226 5227 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 5228 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 5229 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 5230 file_info->CompressionUnitShift = 0; 5231 file_info->ChunkShift = 0; 5232 file_info->ClusterShift = 0; 5233 memset(&file_info->Reserved[0], 0, 3); 5234 5235 rsp->OutputBufferLength = 5236 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 5237 5238 return 0; 5239 } 5240 5241 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 5242 struct ksmbd_file *fp, void *rsp_org) 5243 { 5244 struct smb2_file_attr_tag_info *file_info; 5245 5246 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5247 pr_err("no right to read the attributes : 0x%x\n", 5248 fp->daccess); 5249 return -EACCES; 5250 } 5251 5252 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 5253 file_info->FileAttributes = fp->f_ci->m_fattr; 5254 file_info->ReparseTag = 0; 5255 rsp->OutputBufferLength = 5256 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 5257 return 0; 5258 } 5259 5260 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 5261 struct ksmbd_file *fp, void *rsp_org) 5262 { 5263 struct smb311_posix_qinfo *file_info; 5264 struct inode *inode = file_inode(fp->filp); 5265 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 5266 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 5267 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 5268 struct kstat stat; 5269 u64 time; 5270 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 5271 int ret; 5272 5273 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5274 AT_STATX_SYNC_AS_STAT); 5275 if (ret) 5276 return ret; 5277 5278 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 5279 file_info->CreationTime = cpu_to_le64(fp->create_time); 5280 time = ksmbd_UnixTimeToNT(stat.atime); 5281 file_info->LastAccessTime = cpu_to_le64(time); 5282 time = ksmbd_UnixTimeToNT(stat.mtime); 5283 file_info->LastWriteTime = cpu_to_le64(time); 5284 time = ksmbd_UnixTimeToNT(stat.ctime); 5285 file_info->ChangeTime = cpu_to_le64(time); 5286 file_info->DosAttributes = fp->f_ci->m_fattr; 5287 file_info->Inode = cpu_to_le64(stat.ino); 5288 if (ksmbd_stream_fd(fp) == false) { 5289 file_info->EndOfFile = cpu_to_le64(stat.size); 5290 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5291 } else { 5292 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5293 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5294 } 5295 file_info->HardLinks = cpu_to_le32(stat.nlink); 5296 file_info->Mode = cpu_to_le32(stat.mode & 0777); 5297 switch (stat.mode & S_IFMT) { 5298 case S_IFDIR: 5299 file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 5300 break; 5301 case S_IFLNK: 5302 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 5303 break; 5304 case S_IFCHR: 5305 file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 5306 break; 5307 case S_IFBLK: 5308 file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 5309 break; 5310 case S_IFIFO: 5311 file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 5312 break; 5313 case S_IFSOCK: 5314 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 5315 } 5316 5317 file_info->DeviceId = cpu_to_le32(stat.rdev); 5318 5319 /* 5320 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 5321 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 5322 * sub_auth(4 * 1(num_subauth)) + RID(4). 5323 */ 5324 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 5325 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 5326 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 5327 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 5328 5329 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 5330 5331 return 0; 5332 } 5333 5334 static int smb2_get_info_file(struct ksmbd_work *work, 5335 struct smb2_query_info_req *req, 5336 struct smb2_query_info_rsp *rsp) 5337 { 5338 struct ksmbd_file *fp; 5339 int fileinfoclass = 0; 5340 int rc = 0; 5341 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5342 5343 if (test_share_config_flag(work->tcon->share_conf, 5344 KSMBD_SHARE_FLAG_PIPE)) { 5345 /* smb2 info file called for pipe */ 5346 return smb2_get_info_file_pipe(work->sess, req, rsp, 5347 work->response_buf); 5348 } 5349 5350 if (work->next_smb2_rcv_hdr_off) { 5351 if (!has_file_id(req->VolatileFileId)) { 5352 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5353 work->compound_fid); 5354 id = work->compound_fid; 5355 pid = work->compound_pfid; 5356 } 5357 } 5358 5359 if (!has_file_id(id)) { 5360 id = req->VolatileFileId; 5361 pid = req->PersistentFileId; 5362 } 5363 5364 fp = ksmbd_lookup_fd_slow(work, id, pid); 5365 if (!fp) 5366 return -ENOENT; 5367 5368 fileinfoclass = req->FileInfoClass; 5369 5370 switch (fileinfoclass) { 5371 case FILE_ACCESS_INFORMATION: 5372 get_file_access_info(rsp, fp, work->response_buf); 5373 break; 5374 5375 case FILE_BASIC_INFORMATION: 5376 rc = get_file_basic_info(rsp, fp, work->response_buf); 5377 break; 5378 5379 case FILE_STANDARD_INFORMATION: 5380 rc = get_file_standard_info(rsp, fp, work->response_buf); 5381 break; 5382 5383 case FILE_ALIGNMENT_INFORMATION: 5384 get_file_alignment_info(rsp, work->response_buf); 5385 break; 5386 5387 case FILE_ALL_INFORMATION: 5388 rc = get_file_all_info(work, rsp, fp, work->response_buf); 5389 break; 5390 5391 case FILE_ALTERNATE_NAME_INFORMATION: 5392 get_file_alternate_info(work, rsp, fp, work->response_buf); 5393 break; 5394 5395 case FILE_STREAM_INFORMATION: 5396 rc = get_file_stream_info(work, rsp, fp, work->response_buf); 5397 break; 5398 5399 case FILE_INTERNAL_INFORMATION: 5400 rc = get_file_internal_info(rsp, fp, work->response_buf); 5401 break; 5402 5403 case FILE_NETWORK_OPEN_INFORMATION: 5404 rc = get_file_network_open_info(rsp, fp, work->response_buf); 5405 break; 5406 5407 case FILE_EA_INFORMATION: 5408 get_file_ea_info(rsp, work->response_buf); 5409 break; 5410 5411 case FILE_FULL_EA_INFORMATION: 5412 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 5413 break; 5414 5415 case FILE_POSITION_INFORMATION: 5416 get_file_position_info(rsp, fp, work->response_buf); 5417 break; 5418 5419 case FILE_MODE_INFORMATION: 5420 get_file_mode_info(rsp, fp, work->response_buf); 5421 break; 5422 5423 case FILE_COMPRESSION_INFORMATION: 5424 rc = get_file_compression_info(rsp, fp, work->response_buf); 5425 break; 5426 5427 case FILE_ATTRIBUTE_TAG_INFORMATION: 5428 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 5429 break; 5430 case SMB_FIND_FILE_POSIX_INFO: 5431 if (!work->tcon->posix_extensions) { 5432 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5433 rc = -EOPNOTSUPP; 5434 } else { 5435 rc = find_file_posix_info(rsp, fp, work->response_buf); 5436 } 5437 break; 5438 default: 5439 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 5440 fileinfoclass); 5441 rc = -EOPNOTSUPP; 5442 } 5443 if (!rc) 5444 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5445 rsp, work->response_buf); 5446 ksmbd_fd_put(work, fp); 5447 return rc; 5448 } 5449 5450 static int smb2_get_info_filesystem(struct ksmbd_work *work, 5451 struct smb2_query_info_req *req, 5452 struct smb2_query_info_rsp *rsp) 5453 { 5454 struct ksmbd_session *sess = work->sess; 5455 struct ksmbd_conn *conn = work->conn; 5456 struct ksmbd_share_config *share = work->tcon->share_conf; 5457 int fsinfoclass = 0; 5458 struct kstatfs stfs; 5459 struct path path; 5460 int rc = 0, len; 5461 5462 if (!share->path) 5463 return -EIO; 5464 5465 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5466 if (rc) { 5467 pr_err("cannot create vfs path\n"); 5468 return -EIO; 5469 } 5470 5471 rc = vfs_statfs(&path, &stfs); 5472 if (rc) { 5473 pr_err("cannot do stat of path %s\n", share->path); 5474 path_put(&path); 5475 return -EIO; 5476 } 5477 5478 fsinfoclass = req->FileInfoClass; 5479 5480 switch (fsinfoclass) { 5481 case FS_DEVICE_INFORMATION: 5482 { 5483 FILE_SYSTEM_DEVICE_INFO *info; 5484 5485 info = (FILE_SYSTEM_DEVICE_INFO *)rsp->Buffer; 5486 5487 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); 5488 info->DeviceCharacteristics = 5489 cpu_to_le32(FILE_DEVICE_IS_MOUNTED); 5490 if (!test_tree_conn_flag(work->tcon, 5491 KSMBD_TREE_CONN_FLAG_WRITABLE)) 5492 info->DeviceCharacteristics |= 5493 cpu_to_le32(FILE_READ_ONLY_DEVICE); 5494 rsp->OutputBufferLength = cpu_to_le32(8); 5495 break; 5496 } 5497 case FS_ATTRIBUTE_INFORMATION: 5498 { 5499 FILE_SYSTEM_ATTRIBUTE_INFO *info; 5500 size_t sz; 5501 5502 info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer; 5503 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5504 FILE_PERSISTENT_ACLS | 5505 FILE_UNICODE_ON_DISK | 5506 FILE_CASE_PRESERVED_NAMES | 5507 FILE_CASE_SENSITIVE_SEARCH | 5508 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5509 5510 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5511 5512 if (test_share_config_flag(work->tcon->share_conf, 5513 KSMBD_SHARE_FLAG_STREAMS)) 5514 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5515 5516 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5517 /* 5518 * some application(potableapp) can not run on ksmbd share 5519 * because only NTFS handle security setting on windows. 5520 * So Although local fs(EXT4 or F2fs, etc) is not NTFS, 5521 * ksmbd should show share as NTFS. Later, If needed, we can add 5522 * fs type(s) parameter to change fs type user wanted. 5523 */ 5524 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5525 "NTFS", PATH_MAX, conn->local_nls, 0); 5526 len = len * 2; 5527 info->FileSystemNameLen = cpu_to_le32(len); 5528 sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len; 5529 rsp->OutputBufferLength = cpu_to_le32(sz); 5530 break; 5531 } 5532 case FS_VOLUME_INFORMATION: 5533 { 5534 struct filesystem_vol_info *info; 5535 size_t sz; 5536 unsigned int serial_crc = 0; 5537 5538 info = (struct filesystem_vol_info *)(rsp->Buffer); 5539 info->VolumeCreationTime = 0; 5540 serial_crc = crc32_le(serial_crc, share->name, 5541 strlen(share->name)); 5542 serial_crc = crc32_le(serial_crc, share->path, 5543 strlen(share->path)); 5544 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5545 strlen(ksmbd_netbios_name())); 5546 /* Taking dummy value of serial number*/ 5547 info->SerialNumber = cpu_to_le32(serial_crc); 5548 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5549 share->name, PATH_MAX, 5550 conn->local_nls, 0); 5551 len = len * 2; 5552 info->VolumeLabelSize = cpu_to_le32(len); 5553 info->Reserved = 0; 5554 sz = sizeof(struct filesystem_vol_info) + len; 5555 rsp->OutputBufferLength = cpu_to_le32(sz); 5556 break; 5557 } 5558 case FS_SIZE_INFORMATION: 5559 { 5560 FILE_SYSTEM_SIZE_INFO *info; 5561 5562 info = (FILE_SYSTEM_SIZE_INFO *)(rsp->Buffer); 5563 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5564 info->AvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); 5565 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5566 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5567 rsp->OutputBufferLength = cpu_to_le32(24); 5568 break; 5569 } 5570 case FS_FULL_SIZE_INFORMATION: 5571 { 5572 struct smb2_fs_full_size_info *info; 5573 5574 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5575 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5576 info->CallerAvailableAllocationUnits = 5577 cpu_to_le64(stfs.f_bavail); 5578 info->ActualAvailableAllocationUnits = 5579 cpu_to_le64(stfs.f_bfree); 5580 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5581 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5582 rsp->OutputBufferLength = cpu_to_le32(32); 5583 break; 5584 } 5585 case FS_OBJECT_ID_INFORMATION: 5586 { 5587 struct object_id_info *info; 5588 5589 info = (struct object_id_info *)(rsp->Buffer); 5590 5591 if (!user_guest(sess->user)) 5592 memcpy(info->objid, user_passkey(sess->user), 16); 5593 else 5594 memset(info->objid, 0, 16); 5595 5596 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5597 info->extended_info.version = cpu_to_le32(1); 5598 info->extended_info.release = cpu_to_le32(1); 5599 info->extended_info.rel_date = 0; 5600 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5601 rsp->OutputBufferLength = cpu_to_le32(64); 5602 break; 5603 } 5604 case FS_SECTOR_SIZE_INFORMATION: 5605 { 5606 struct smb3_fs_ss_info *info; 5607 unsigned int sector_size = 5608 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5609 5610 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5611 5612 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5613 info->PhysicalBytesPerSectorForAtomicity = 5614 cpu_to_le32(sector_size); 5615 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5616 info->FSEffPhysicalBytesPerSectorForAtomicity = 5617 cpu_to_le32(sector_size); 5618 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5619 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5620 info->ByteOffsetForSectorAlignment = 0; 5621 info->ByteOffsetForPartitionAlignment = 0; 5622 rsp->OutputBufferLength = cpu_to_le32(28); 5623 break; 5624 } 5625 case FS_CONTROL_INFORMATION: 5626 { 5627 /* 5628 * TODO : The current implementation is based on 5629 * test result with win7(NTFS) server. It's need to 5630 * modify this to get valid Quota values 5631 * from Linux kernel 5632 */ 5633 struct smb2_fs_control_info *info; 5634 5635 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5636 info->FreeSpaceStartFiltering = 0; 5637 info->FreeSpaceThreshold = 0; 5638 info->FreeSpaceStopFiltering = 0; 5639 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5640 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5641 info->Padding = 0; 5642 rsp->OutputBufferLength = cpu_to_le32(48); 5643 break; 5644 } 5645 case FS_POSIX_INFORMATION: 5646 { 5647 FILE_SYSTEM_POSIX_INFO *info; 5648 5649 if (!work->tcon->posix_extensions) { 5650 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5651 path_put(&path); 5652 return -EOPNOTSUPP; 5653 } else { 5654 info = (FILE_SYSTEM_POSIX_INFO *)(rsp->Buffer); 5655 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5656 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5657 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5658 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5659 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5660 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5661 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5662 rsp->OutputBufferLength = cpu_to_le32(56); 5663 } 5664 break; 5665 } 5666 default: 5667 path_put(&path); 5668 return -EOPNOTSUPP; 5669 } 5670 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5671 rsp, work->response_buf); 5672 path_put(&path); 5673 return rc; 5674 } 5675 5676 static int smb2_get_info_sec(struct ksmbd_work *work, 5677 struct smb2_query_info_req *req, 5678 struct smb2_query_info_rsp *rsp) 5679 { 5680 struct ksmbd_file *fp; 5681 struct mnt_idmap *idmap; 5682 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5683 struct smb_fattr fattr = {{0}}; 5684 struct inode *inode; 5685 __u32 secdesclen = 0; 5686 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5687 int addition_info = le32_to_cpu(req->AdditionalInformation); 5688 int rc = 0, ppntsd_size = 0; 5689 5690 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5691 PROTECTED_DACL_SECINFO | 5692 UNPROTECTED_DACL_SECINFO)) { 5693 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5694 addition_info); 5695 5696 pntsd->revision = cpu_to_le16(1); 5697 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5698 pntsd->osidoffset = 0; 5699 pntsd->gsidoffset = 0; 5700 pntsd->sacloffset = 0; 5701 pntsd->dacloffset = 0; 5702 5703 secdesclen = sizeof(struct smb_ntsd); 5704 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5705 5706 return 0; 5707 } 5708 5709 if (work->next_smb2_rcv_hdr_off) { 5710 if (!has_file_id(req->VolatileFileId)) { 5711 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5712 work->compound_fid); 5713 id = work->compound_fid; 5714 pid = work->compound_pfid; 5715 } 5716 } 5717 5718 if (!has_file_id(id)) { 5719 id = req->VolatileFileId; 5720 pid = req->PersistentFileId; 5721 } 5722 5723 fp = ksmbd_lookup_fd_slow(work, id, pid); 5724 if (!fp) 5725 return -ENOENT; 5726 5727 idmap = file_mnt_idmap(fp->filp); 5728 inode = file_inode(fp->filp); 5729 ksmbd_acls_fattr(&fattr, idmap, inode); 5730 5731 if (test_share_config_flag(work->tcon->share_conf, 5732 KSMBD_SHARE_FLAG_ACL_XATTR)) 5733 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5734 fp->filp->f_path.dentry, 5735 &ppntsd); 5736 5737 /* Check if sd buffer size exceeds response buffer size */ 5738 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5739 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5740 addition_info, &secdesclen, &fattr); 5741 posix_acl_release(fattr.cf_acls); 5742 posix_acl_release(fattr.cf_dacls); 5743 kfree(ppntsd); 5744 ksmbd_fd_put(work, fp); 5745 if (rc) 5746 return rc; 5747 5748 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5749 return 0; 5750 } 5751 5752 /** 5753 * smb2_query_info() - handler for smb2 query info command 5754 * @work: smb work containing query info request buffer 5755 * 5756 * Return: 0 on success, otherwise error 5757 */ 5758 int smb2_query_info(struct ksmbd_work *work) 5759 { 5760 struct smb2_query_info_req *req; 5761 struct smb2_query_info_rsp *rsp; 5762 int rc = 0; 5763 5764 ksmbd_debug(SMB, "Received request smb2 query info request\n"); 5765 5766 WORK_BUFFERS(work, req, rsp); 5767 5768 if (ksmbd_override_fsids(work)) { 5769 rc = -ENOMEM; 5770 goto err_out; 5771 } 5772 5773 switch (req->InfoType) { 5774 case SMB2_O_INFO_FILE: 5775 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5776 rc = smb2_get_info_file(work, req, rsp); 5777 break; 5778 case SMB2_O_INFO_FILESYSTEM: 5779 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5780 rc = smb2_get_info_filesystem(work, req, rsp); 5781 break; 5782 case SMB2_O_INFO_SECURITY: 5783 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5784 rc = smb2_get_info_sec(work, req, rsp); 5785 break; 5786 default: 5787 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5788 req->InfoType); 5789 rc = -EOPNOTSUPP; 5790 } 5791 ksmbd_revert_fsids(work); 5792 5793 if (!rc) { 5794 rsp->StructureSize = cpu_to_le16(9); 5795 rsp->OutputBufferOffset = cpu_to_le16(72); 5796 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5797 offsetof(struct smb2_query_info_rsp, Buffer) + 5798 le32_to_cpu(rsp->OutputBufferLength)); 5799 } 5800 5801 err_out: 5802 if (rc < 0) { 5803 if (rc == -EACCES) 5804 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5805 else if (rc == -ENOENT) 5806 rsp->hdr.Status = STATUS_FILE_CLOSED; 5807 else if (rc == -EIO) 5808 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5809 else if (rc == -ENOMEM) 5810 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5811 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5812 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5813 smb2_set_err_rsp(work); 5814 5815 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5816 rc); 5817 return rc; 5818 } 5819 return 0; 5820 } 5821 5822 /** 5823 * smb2_close_pipe() - handler for closing IPC pipe 5824 * @work: smb work containing close request buffer 5825 * 5826 * Return: 0 5827 */ 5828 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5829 { 5830 u64 id; 5831 struct smb2_close_req *req; 5832 struct smb2_close_rsp *rsp; 5833 5834 WORK_BUFFERS(work, req, rsp); 5835 5836 id = req->VolatileFileId; 5837 ksmbd_session_rpc_close(work->sess, id); 5838 5839 rsp->StructureSize = cpu_to_le16(60); 5840 rsp->Flags = 0; 5841 rsp->Reserved = 0; 5842 rsp->CreationTime = 0; 5843 rsp->LastAccessTime = 0; 5844 rsp->LastWriteTime = 0; 5845 rsp->ChangeTime = 0; 5846 rsp->AllocationSize = 0; 5847 rsp->EndOfFile = 0; 5848 rsp->Attributes = 0; 5849 5850 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5851 sizeof(struct smb2_close_rsp)); 5852 } 5853 5854 /** 5855 * smb2_close() - handler for smb2 close file command 5856 * @work: smb work containing close request buffer 5857 * 5858 * Return: 0 on success, otherwise error 5859 */ 5860 int smb2_close(struct ksmbd_work *work) 5861 { 5862 u64 volatile_id = KSMBD_NO_FID; 5863 u64 sess_id; 5864 struct smb2_close_req *req; 5865 struct smb2_close_rsp *rsp; 5866 struct ksmbd_conn *conn = work->conn; 5867 struct ksmbd_file *fp; 5868 u64 time; 5869 int err = 0; 5870 5871 ksmbd_debug(SMB, "Received smb2 close request\n"); 5872 5873 WORK_BUFFERS(work, req, rsp); 5874 5875 if (test_share_config_flag(work->tcon->share_conf, 5876 KSMBD_SHARE_FLAG_PIPE)) { 5877 ksmbd_debug(SMB, "IPC pipe close request\n"); 5878 return smb2_close_pipe(work); 5879 } 5880 5881 sess_id = le64_to_cpu(req->hdr.SessionId); 5882 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5883 sess_id = work->compound_sid; 5884 5885 work->compound_sid = 0; 5886 if (check_session_id(conn, sess_id)) { 5887 work->compound_sid = sess_id; 5888 } else { 5889 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5890 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5891 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5892 err = -EBADF; 5893 goto out; 5894 } 5895 5896 if (work->next_smb2_rcv_hdr_off && 5897 !has_file_id(req->VolatileFileId)) { 5898 if (!has_file_id(work->compound_fid)) { 5899 /* file already closed, return FILE_CLOSED */ 5900 ksmbd_debug(SMB, "file already closed\n"); 5901 rsp->hdr.Status = STATUS_FILE_CLOSED; 5902 err = -EBADF; 5903 goto out; 5904 } else { 5905 ksmbd_debug(SMB, 5906 "Compound request set FID = %llu:%llu\n", 5907 work->compound_fid, 5908 work->compound_pfid); 5909 volatile_id = work->compound_fid; 5910 5911 /* file closed, stored id is not valid anymore */ 5912 work->compound_fid = KSMBD_NO_FID; 5913 work->compound_pfid = KSMBD_NO_FID; 5914 } 5915 } else { 5916 volatile_id = req->VolatileFileId; 5917 } 5918 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5919 5920 rsp->StructureSize = cpu_to_le16(60); 5921 rsp->Reserved = 0; 5922 5923 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5924 struct kstat stat; 5925 int ret; 5926 5927 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5928 if (!fp) { 5929 err = -ENOENT; 5930 goto out; 5931 } 5932 5933 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5934 AT_STATX_SYNC_AS_STAT); 5935 if (ret) { 5936 ksmbd_fd_put(work, fp); 5937 goto out; 5938 } 5939 5940 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5941 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 5942 cpu_to_le64(stat.blocks << 9); 5943 rsp->EndOfFile = cpu_to_le64(stat.size); 5944 rsp->Attributes = fp->f_ci->m_fattr; 5945 rsp->CreationTime = cpu_to_le64(fp->create_time); 5946 time = ksmbd_UnixTimeToNT(stat.atime); 5947 rsp->LastAccessTime = cpu_to_le64(time); 5948 time = ksmbd_UnixTimeToNT(stat.mtime); 5949 rsp->LastWriteTime = cpu_to_le64(time); 5950 time = ksmbd_UnixTimeToNT(stat.ctime); 5951 rsp->ChangeTime = cpu_to_le64(time); 5952 ksmbd_fd_put(work, fp); 5953 } else { 5954 rsp->Flags = 0; 5955 rsp->AllocationSize = 0; 5956 rsp->EndOfFile = 0; 5957 rsp->Attributes = 0; 5958 rsp->CreationTime = 0; 5959 rsp->LastAccessTime = 0; 5960 rsp->LastWriteTime = 0; 5961 rsp->ChangeTime = 0; 5962 } 5963 5964 err = ksmbd_close_fd(work, volatile_id); 5965 out: 5966 if (!err) 5967 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 5968 sizeof(struct smb2_close_rsp)); 5969 5970 if (err) { 5971 if (rsp->hdr.Status == 0) 5972 rsp->hdr.Status = STATUS_FILE_CLOSED; 5973 smb2_set_err_rsp(work); 5974 } 5975 5976 return err; 5977 } 5978 5979 /** 5980 * smb2_echo() - handler for smb2 echo(ping) command 5981 * @work: smb work containing echo request buffer 5982 * 5983 * Return: 0 on success, otherwise error 5984 */ 5985 int smb2_echo(struct ksmbd_work *work) 5986 { 5987 struct smb2_echo_rsp *rsp = smb_get_msg(work->response_buf); 5988 5989 ksmbd_debug(SMB, "Received smb2 echo request\n"); 5990 5991 if (work->next_smb2_rcv_hdr_off) 5992 rsp = ksmbd_resp_buf_next(work); 5993 5994 rsp->StructureSize = cpu_to_le16(4); 5995 rsp->Reserved = 0; 5996 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 5997 } 5998 5999 static int smb2_rename(struct ksmbd_work *work, 6000 struct ksmbd_file *fp, 6001 struct smb2_file_rename_info *file_info, 6002 struct nls_table *local_nls) 6003 { 6004 struct ksmbd_share_config *share = fp->tcon->share_conf; 6005 char *new_name = NULL; 6006 int rc, flags = 0; 6007 6008 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 6009 new_name = smb2_get_name(file_info->FileName, 6010 le32_to_cpu(file_info->FileNameLength), 6011 local_nls); 6012 if (IS_ERR(new_name)) 6013 return PTR_ERR(new_name); 6014 6015 if (fp->is_posix_ctxt == false && strchr(new_name, ':')) { 6016 int s_type; 6017 char *xattr_stream_name, *stream_name = NULL; 6018 size_t xattr_stream_size; 6019 int len; 6020 6021 rc = parse_stream_name(new_name, &stream_name, &s_type); 6022 if (rc < 0) 6023 goto out; 6024 6025 len = strlen(new_name); 6026 if (len > 0 && new_name[len - 1] != '/') { 6027 pr_err("not allow base filename in rename\n"); 6028 rc = -ESHARE; 6029 goto out; 6030 } 6031 6032 rc = ksmbd_vfs_xattr_stream_name(stream_name, 6033 &xattr_stream_name, 6034 &xattr_stream_size, 6035 s_type); 6036 if (rc) 6037 goto out; 6038 6039 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 6040 &fp->filp->f_path, 6041 xattr_stream_name, 6042 NULL, 0, 0, true); 6043 if (rc < 0) { 6044 pr_err("failed to store stream name in xattr: %d\n", 6045 rc); 6046 rc = -EINVAL; 6047 goto out; 6048 } 6049 6050 goto out; 6051 } 6052 6053 ksmbd_debug(SMB, "new name %s\n", new_name); 6054 if (ksmbd_share_veto_filename(share, new_name)) { 6055 rc = -ENOENT; 6056 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 6057 goto out; 6058 } 6059 6060 if (!file_info->ReplaceIfExists) 6061 flags = RENAME_NOREPLACE; 6062 6063 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 6064 if (!rc) 6065 smb_break_all_levII_oplock(work, fp, 0); 6066 out: 6067 kfree(new_name); 6068 return rc; 6069 } 6070 6071 static int smb2_create_link(struct ksmbd_work *work, 6072 struct ksmbd_share_config *share, 6073 struct smb2_file_link_info *file_info, 6074 unsigned int buf_len, struct file *filp, 6075 struct nls_table *local_nls) 6076 { 6077 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 6078 struct path path; 6079 int rc; 6080 6081 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 6082 le32_to_cpu(file_info->FileNameLength)) 6083 return -EINVAL; 6084 6085 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 6086 pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP); 6087 if (!pathname) 6088 return -ENOMEM; 6089 6090 link_name = smb2_get_name(file_info->FileName, 6091 le32_to_cpu(file_info->FileNameLength), 6092 local_nls); 6093 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 6094 rc = -EINVAL; 6095 goto out; 6096 } 6097 6098 ksmbd_debug(SMB, "link name is %s\n", link_name); 6099 target_name = file_path(filp, pathname, PATH_MAX); 6100 if (IS_ERR(target_name)) { 6101 rc = -EINVAL; 6102 goto out; 6103 } 6104 6105 ksmbd_debug(SMB, "target name is %s\n", target_name); 6106 rc = ksmbd_vfs_kern_path_start_removing(work, link_name, LOOKUP_NO_SYMLINKS, 6107 &path, 0); 6108 if (rc) { 6109 if (rc != -ENOENT) 6110 goto out; 6111 } else { 6112 if (file_info->ReplaceIfExists) { 6113 rc = ksmbd_vfs_remove_file(work, &path); 6114 if (rc) { 6115 rc = -EINVAL; 6116 ksmbd_debug(SMB, "cannot delete %s\n", 6117 link_name); 6118 goto out; 6119 } 6120 } else { 6121 rc = -EEXIST; 6122 ksmbd_debug(SMB, "link already exists\n"); 6123 goto out; 6124 } 6125 ksmbd_vfs_kern_path_end_removing(&path); 6126 } 6127 rc = ksmbd_vfs_link(work, target_name, link_name); 6128 if (rc) 6129 rc = -EINVAL; 6130 out: 6131 6132 if (!IS_ERR(link_name)) 6133 kfree(link_name); 6134 kfree(pathname); 6135 return rc; 6136 } 6137 6138 static int set_file_basic_info(struct ksmbd_file *fp, 6139 struct smb2_file_basic_info *file_info, 6140 struct ksmbd_share_config *share) 6141 { 6142 struct iattr attrs; 6143 struct file *filp; 6144 struct inode *inode; 6145 struct mnt_idmap *idmap; 6146 int rc = 0; 6147 6148 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 6149 return -EACCES; 6150 6151 attrs.ia_valid = 0; 6152 filp = fp->filp; 6153 inode = file_inode(filp); 6154 idmap = file_mnt_idmap(filp); 6155 6156 if (file_info->CreationTime) 6157 fp->create_time = le64_to_cpu(file_info->CreationTime); 6158 6159 if (file_info->LastAccessTime) { 6160 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 6161 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 6162 } 6163 6164 if (file_info->ChangeTime) 6165 inode_set_ctime_to_ts(inode, 6166 ksmbd_NTtimeToUnix(file_info->ChangeTime)); 6167 6168 if (file_info->LastWriteTime) { 6169 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 6170 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME); 6171 } 6172 6173 if (file_info->Attributes) { 6174 if (!S_ISDIR(inode->i_mode) && 6175 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 6176 pr_err("can't change a file to a directory\n"); 6177 return -EINVAL; 6178 } 6179 6180 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 6181 fp->f_ci->m_fattr = file_info->Attributes | 6182 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 6183 } 6184 6185 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 6186 (file_info->CreationTime || file_info->Attributes)) { 6187 struct xattr_dos_attrib da = {0}; 6188 6189 da.version = 4; 6190 da.itime = fp->itime; 6191 da.create_time = fp->create_time; 6192 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 6193 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 6194 XATTR_DOSINFO_ITIME; 6195 6196 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 6197 true); 6198 if (rc) 6199 ksmbd_debug(SMB, 6200 "failed to restore file attribute in EA\n"); 6201 rc = 0; 6202 } 6203 6204 if (attrs.ia_valid) { 6205 struct dentry *dentry = filp->f_path.dentry; 6206 struct inode *inode = d_inode(dentry); 6207 6208 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 6209 return -EACCES; 6210 6211 inode_lock(inode); 6212 rc = notify_change(idmap, dentry, &attrs, NULL); 6213 inode_unlock(inode); 6214 } 6215 return rc; 6216 } 6217 6218 static int set_file_allocation_info(struct ksmbd_work *work, 6219 struct ksmbd_file *fp, 6220 struct smb2_file_alloc_info *file_alloc_info) 6221 { 6222 /* 6223 * TODO : It's working fine only when store dos attributes 6224 * is not yes. need to implement a logic which works 6225 * properly with any smb.conf option 6226 */ 6227 6228 loff_t alloc_blks; 6229 struct inode *inode; 6230 struct kstat stat; 6231 int rc; 6232 6233 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6234 return -EACCES; 6235 6236 if (ksmbd_stream_fd(fp) == true) 6237 return 0; 6238 6239 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6240 AT_STATX_SYNC_AS_STAT); 6241 if (rc) 6242 return rc; 6243 6244 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 6245 inode = file_inode(fp->filp); 6246 6247 if (alloc_blks > stat.blocks) { 6248 smb_break_all_levII_oplock(work, fp, 1); 6249 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 6250 alloc_blks * 512); 6251 if (rc && rc != -EOPNOTSUPP) { 6252 pr_err("vfs_fallocate is failed : %d\n", rc); 6253 return rc; 6254 } 6255 } else if (alloc_blks < stat.blocks) { 6256 loff_t size; 6257 6258 /* 6259 * Allocation size could be smaller than original one 6260 * which means allocated blocks in file should be 6261 * deallocated. use truncate to cut out it, but inode 6262 * size is also updated with truncate offset. 6263 * inode size is retained by backup inode size. 6264 */ 6265 size = i_size_read(inode); 6266 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 6267 if (rc) { 6268 pr_err("truncate failed!, err %d\n", rc); 6269 return rc; 6270 } 6271 if (size < alloc_blks * 512) 6272 i_size_write(inode, size); 6273 } 6274 return 0; 6275 } 6276 6277 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6278 struct smb2_file_eof_info *file_eof_info) 6279 { 6280 loff_t newsize; 6281 struct inode *inode; 6282 int rc; 6283 6284 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6285 return -EACCES; 6286 6287 newsize = le64_to_cpu(file_eof_info->EndOfFile); 6288 inode = file_inode(fp->filp); 6289 6290 /* 6291 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 6292 * on FAT32 shared device, truncate execution time is too long 6293 * and network error could cause from windows client. because 6294 * truncate of some filesystem like FAT32 fill zero data in 6295 * truncated range. 6296 */ 6297 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC && 6298 ksmbd_stream_fd(fp) == false) { 6299 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 6300 rc = ksmbd_vfs_truncate(work, fp, newsize); 6301 if (rc) { 6302 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 6303 if (rc != -EAGAIN) 6304 rc = -EBADF; 6305 return rc; 6306 } 6307 } 6308 return 0; 6309 } 6310 6311 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6312 struct smb2_file_rename_info *rename_info, 6313 unsigned int buf_len) 6314 { 6315 if (!(fp->daccess & FILE_DELETE_LE)) { 6316 pr_err("no right to delete : 0x%x\n", fp->daccess); 6317 return -EACCES; 6318 } 6319 6320 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 6321 le32_to_cpu(rename_info->FileNameLength)) 6322 return -EINVAL; 6323 6324 if (!le32_to_cpu(rename_info->FileNameLength)) 6325 return -EINVAL; 6326 6327 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 6328 } 6329 6330 static int set_file_disposition_info(struct ksmbd_file *fp, 6331 struct smb2_file_disposition_info *file_info) 6332 { 6333 struct inode *inode; 6334 6335 if (!(fp->daccess & FILE_DELETE_LE)) { 6336 pr_err("no right to delete : 0x%x\n", fp->daccess); 6337 return -EACCES; 6338 } 6339 6340 inode = file_inode(fp->filp); 6341 if (file_info->DeletePending) { 6342 if (S_ISDIR(inode->i_mode) && 6343 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 6344 return -EBUSY; 6345 ksmbd_set_inode_pending_delete(fp); 6346 } else { 6347 ksmbd_clear_inode_pending_delete(fp); 6348 } 6349 return 0; 6350 } 6351 6352 static int set_file_position_info(struct ksmbd_file *fp, 6353 struct smb2_file_pos_info *file_info) 6354 { 6355 loff_t current_byte_offset; 6356 unsigned long sector_size; 6357 struct inode *inode; 6358 6359 inode = file_inode(fp->filp); 6360 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 6361 sector_size = inode->i_sb->s_blocksize; 6362 6363 if (current_byte_offset < 0 || 6364 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 6365 current_byte_offset & (sector_size - 1))) { 6366 pr_err("CurrentByteOffset is not valid : %llu\n", 6367 current_byte_offset); 6368 return -EINVAL; 6369 } 6370 6371 if (ksmbd_stream_fd(fp) == false) 6372 fp->filp->f_pos = current_byte_offset; 6373 else { 6374 if (current_byte_offset > XATTR_SIZE_MAX) 6375 current_byte_offset = XATTR_SIZE_MAX; 6376 fp->stream.pos = current_byte_offset; 6377 } 6378 return 0; 6379 } 6380 6381 static int set_file_mode_info(struct ksmbd_file *fp, 6382 struct smb2_file_mode_info *file_info) 6383 { 6384 __le32 mode; 6385 6386 mode = file_info->Mode; 6387 6388 if ((mode & ~FILE_MODE_INFO_MASK)) { 6389 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 6390 return -EINVAL; 6391 } 6392 6393 /* 6394 * TODO : need to implement consideration for 6395 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 6396 */ 6397 ksmbd_vfs_set_fadvise(fp->filp, mode); 6398 fp->coption = mode; 6399 return 0; 6400 } 6401 6402 /** 6403 * smb2_set_info_file() - handler for smb2 set info command 6404 * @work: smb work containing set info command buffer 6405 * @fp: ksmbd_file pointer 6406 * @req: request buffer pointer 6407 * @share: ksmbd_share_config pointer 6408 * 6409 * Return: 0 on success, otherwise error 6410 */ 6411 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 6412 struct smb2_set_info_req *req, 6413 struct ksmbd_share_config *share) 6414 { 6415 unsigned int buf_len = le32_to_cpu(req->BufferLength); 6416 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); 6417 6418 switch (req->FileInfoClass) { 6419 case FILE_BASIC_INFORMATION: 6420 { 6421 if (buf_len < sizeof(struct smb2_file_basic_info)) 6422 return -EMSGSIZE; 6423 6424 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share); 6425 } 6426 case FILE_ALLOCATION_INFORMATION: 6427 { 6428 if (buf_len < sizeof(struct smb2_file_alloc_info)) 6429 return -EMSGSIZE; 6430 6431 return set_file_allocation_info(work, fp, 6432 (struct smb2_file_alloc_info *)buffer); 6433 } 6434 case FILE_END_OF_FILE_INFORMATION: 6435 { 6436 if (buf_len < sizeof(struct smb2_file_eof_info)) 6437 return -EMSGSIZE; 6438 6439 return set_end_of_file_info(work, fp, 6440 (struct smb2_file_eof_info *)buffer); 6441 } 6442 case FILE_RENAME_INFORMATION: 6443 { 6444 if (buf_len < sizeof(struct smb2_file_rename_info)) 6445 return -EMSGSIZE; 6446 6447 return set_rename_info(work, fp, 6448 (struct smb2_file_rename_info *)buffer, 6449 buf_len); 6450 } 6451 case FILE_LINK_INFORMATION: 6452 { 6453 if (buf_len < sizeof(struct smb2_file_link_info)) 6454 return -EMSGSIZE; 6455 6456 return smb2_create_link(work, work->tcon->share_conf, 6457 (struct smb2_file_link_info *)buffer, 6458 buf_len, fp->filp, 6459 work->conn->local_nls); 6460 } 6461 case FILE_DISPOSITION_INFORMATION: 6462 { 6463 if (buf_len < sizeof(struct smb2_file_disposition_info)) 6464 return -EMSGSIZE; 6465 6466 return set_file_disposition_info(fp, 6467 (struct smb2_file_disposition_info *)buffer); 6468 } 6469 case FILE_FULL_EA_INFORMATION: 6470 { 6471 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 6472 pr_err("Not permitted to write ext attr: 0x%x\n", 6473 fp->daccess); 6474 return -EACCES; 6475 } 6476 6477 if (buf_len < sizeof(struct smb2_ea_info)) 6478 return -EMSGSIZE; 6479 6480 return smb2_set_ea((struct smb2_ea_info *)buffer, 6481 buf_len, &fp->filp->f_path, true); 6482 } 6483 case FILE_POSITION_INFORMATION: 6484 { 6485 if (buf_len < sizeof(struct smb2_file_pos_info)) 6486 return -EMSGSIZE; 6487 6488 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); 6489 } 6490 case FILE_MODE_INFORMATION: 6491 { 6492 if (buf_len < sizeof(struct smb2_file_mode_info)) 6493 return -EMSGSIZE; 6494 6495 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); 6496 } 6497 } 6498 6499 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6500 return -EOPNOTSUPP; 6501 } 6502 6503 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6504 char *buffer, int buf_len) 6505 { 6506 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6507 6508 fp->saccess |= FILE_SHARE_DELETE_LE; 6509 6510 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6511 buf_len, false, true); 6512 } 6513 6514 /** 6515 * smb2_set_info() - handler for smb2 set info command handler 6516 * @work: smb work containing set info request buffer 6517 * 6518 * Return: 0 on success, otherwise error 6519 */ 6520 int smb2_set_info(struct ksmbd_work *work) 6521 { 6522 struct smb2_set_info_req *req; 6523 struct smb2_set_info_rsp *rsp; 6524 struct ksmbd_file *fp = NULL; 6525 int rc = 0; 6526 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6527 6528 ksmbd_debug(SMB, "Received smb2 set info request\n"); 6529 6530 if (work->next_smb2_rcv_hdr_off) { 6531 req = ksmbd_req_buf_next(work); 6532 rsp = ksmbd_resp_buf_next(work); 6533 if (!has_file_id(req->VolatileFileId)) { 6534 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6535 work->compound_fid); 6536 id = work->compound_fid; 6537 pid = work->compound_pfid; 6538 } 6539 } else { 6540 req = smb_get_msg(work->request_buf); 6541 rsp = smb_get_msg(work->response_buf); 6542 } 6543 6544 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6545 ksmbd_debug(SMB, "User does not have write permission\n"); 6546 pr_err("User does not have write permission\n"); 6547 rc = -EACCES; 6548 goto err_out; 6549 } 6550 6551 if (!has_file_id(id)) { 6552 id = req->VolatileFileId; 6553 pid = req->PersistentFileId; 6554 } 6555 6556 fp = ksmbd_lookup_fd_slow(work, id, pid); 6557 if (!fp) { 6558 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6559 rc = -ENOENT; 6560 goto err_out; 6561 } 6562 6563 switch (req->InfoType) { 6564 case SMB2_O_INFO_FILE: 6565 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6566 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6567 break; 6568 case SMB2_O_INFO_SECURITY: 6569 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6570 if (ksmbd_override_fsids(work)) { 6571 rc = -ENOMEM; 6572 goto err_out; 6573 } 6574 rc = smb2_set_info_sec(fp, 6575 le32_to_cpu(req->AdditionalInformation), 6576 (char *)req + le16_to_cpu(req->BufferOffset), 6577 le32_to_cpu(req->BufferLength)); 6578 ksmbd_revert_fsids(work); 6579 break; 6580 default: 6581 rc = -EOPNOTSUPP; 6582 } 6583 6584 if (rc < 0) 6585 goto err_out; 6586 6587 rsp->StructureSize = cpu_to_le16(2); 6588 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6589 sizeof(struct smb2_set_info_rsp)); 6590 if (rc) 6591 goto err_out; 6592 ksmbd_fd_put(work, fp); 6593 return 0; 6594 6595 err_out: 6596 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6597 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6598 else if (rc == -EINVAL) 6599 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6600 else if (rc == -EMSGSIZE) 6601 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 6602 else if (rc == -ESHARE) 6603 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6604 else if (rc == -ENOENT) 6605 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6606 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6607 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6608 else if (rc == -EAGAIN) 6609 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6610 else if (rc == -EBADF || rc == -ESTALE) 6611 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6612 else if (rc == -EEXIST) 6613 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6614 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6615 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6616 smb2_set_err_rsp(work); 6617 ksmbd_fd_put(work, fp); 6618 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6619 return rc; 6620 } 6621 6622 /** 6623 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6624 * @work: smb work containing read IPC pipe command buffer 6625 * 6626 * Return: 0 on success, otherwise error 6627 */ 6628 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6629 { 6630 int nbytes = 0, err; 6631 u64 id; 6632 struct ksmbd_rpc_command *rpc_resp; 6633 struct smb2_read_req *req; 6634 struct smb2_read_rsp *rsp; 6635 6636 WORK_BUFFERS(work, req, rsp); 6637 6638 id = req->VolatileFileId; 6639 6640 rpc_resp = ksmbd_rpc_read(work->sess, id); 6641 if (rpc_resp) { 6642 void *aux_payload_buf; 6643 6644 if (rpc_resp->flags != KSMBD_RPC_OK) { 6645 err = -EINVAL; 6646 goto out; 6647 } 6648 6649 aux_payload_buf = 6650 kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP); 6651 if (!aux_payload_buf) { 6652 err = -ENOMEM; 6653 goto out; 6654 } 6655 6656 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6657 6658 nbytes = rpc_resp->payload_sz; 6659 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6660 offsetof(struct smb2_read_rsp, Buffer), 6661 aux_payload_buf, nbytes); 6662 if (err) { 6663 kvfree(aux_payload_buf); 6664 goto out; 6665 } 6666 kvfree(rpc_resp); 6667 } else { 6668 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6669 offsetof(struct smb2_read_rsp, Buffer)); 6670 if (err) 6671 goto out; 6672 } 6673 6674 rsp->StructureSize = cpu_to_le16(17); 6675 rsp->DataOffset = 80; 6676 rsp->Reserved = 0; 6677 rsp->DataLength = cpu_to_le32(nbytes); 6678 rsp->DataRemaining = 0; 6679 rsp->Flags = 0; 6680 return 0; 6681 6682 out: 6683 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6684 smb2_set_err_rsp(work); 6685 kvfree(rpc_resp); 6686 return err; 6687 } 6688 6689 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6690 struct smbdirect_buffer_descriptor_v1 *desc, 6691 __le32 Channel, 6692 __le16 ChannelInfoLength) 6693 { 6694 unsigned int i, ch_count; 6695 6696 if (work->conn->dialect == SMB30_PROT_ID && 6697 Channel != SMB2_CHANNEL_RDMA_V1) 6698 return -EINVAL; 6699 6700 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6701 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6702 for (i = 0; i < ch_count; i++) { 6703 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6704 i, 6705 le32_to_cpu(desc[i].token), 6706 le32_to_cpu(desc[i].length)); 6707 } 6708 } 6709 if (!ch_count) 6710 return -EINVAL; 6711 6712 work->need_invalidate_rkey = 6713 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6714 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6715 work->remote_key = le32_to_cpu(desc->token); 6716 return 0; 6717 } 6718 6719 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6720 struct smb2_read_req *req, void *data_buf, 6721 size_t length) 6722 { 6723 int err; 6724 6725 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6726 (struct smbdirect_buffer_descriptor_v1 *) 6727 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6728 le16_to_cpu(req->ReadChannelInfoLength)); 6729 if (err) 6730 return err; 6731 6732 return length; 6733 } 6734 6735 /** 6736 * smb2_read() - handler for smb2 read from file 6737 * @work: smb work containing read command buffer 6738 * 6739 * Return: 0 on success, otherwise error 6740 */ 6741 int smb2_read(struct ksmbd_work *work) 6742 { 6743 struct ksmbd_conn *conn = work->conn; 6744 struct smb2_read_req *req; 6745 struct smb2_read_rsp *rsp; 6746 struct ksmbd_file *fp = NULL; 6747 loff_t offset; 6748 size_t length, mincount; 6749 ssize_t nbytes = 0, remain_bytes = 0; 6750 int err = 0; 6751 bool is_rdma_channel = false; 6752 unsigned int max_read_size = conn->vals->max_read_size; 6753 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6754 void *aux_payload_buf; 6755 6756 ksmbd_debug(SMB, "Received smb2 read request\n"); 6757 6758 if (test_share_config_flag(work->tcon->share_conf, 6759 KSMBD_SHARE_FLAG_PIPE)) { 6760 ksmbd_debug(SMB, "IPC pipe read request\n"); 6761 return smb2_read_pipe(work); 6762 } 6763 6764 if (work->next_smb2_rcv_hdr_off) { 6765 req = ksmbd_req_buf_next(work); 6766 rsp = ksmbd_resp_buf_next(work); 6767 if (!has_file_id(req->VolatileFileId)) { 6768 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6769 work->compound_fid); 6770 id = work->compound_fid; 6771 pid = work->compound_pfid; 6772 } 6773 } else { 6774 req = smb_get_msg(work->request_buf); 6775 rsp = smb_get_msg(work->response_buf); 6776 } 6777 6778 if (!has_file_id(id)) { 6779 id = req->VolatileFileId; 6780 pid = req->PersistentFileId; 6781 } 6782 6783 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6784 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6785 is_rdma_channel = true; 6786 max_read_size = get_smbd_max_read_write_size(work->conn->transport); 6787 if (max_read_size == 0) { 6788 err = -EINVAL; 6789 goto out; 6790 } 6791 } 6792 6793 if (is_rdma_channel == true) { 6794 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6795 6796 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6797 err = -EINVAL; 6798 goto out; 6799 } 6800 err = smb2_set_remote_key_for_rdma(work, 6801 (struct smbdirect_buffer_descriptor_v1 *) 6802 ((char *)req + ch_offset), 6803 req->Channel, 6804 req->ReadChannelInfoLength); 6805 if (err) 6806 goto out; 6807 } 6808 6809 fp = ksmbd_lookup_fd_slow(work, id, pid); 6810 if (!fp) { 6811 err = -ENOENT; 6812 goto out; 6813 } 6814 6815 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6816 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6817 err = -EACCES; 6818 goto out; 6819 } 6820 6821 offset = le64_to_cpu(req->Offset); 6822 if (offset < 0) { 6823 err = -EINVAL; 6824 goto out; 6825 } 6826 length = le32_to_cpu(req->Length); 6827 mincount = le32_to_cpu(req->MinimumCount); 6828 6829 if (length > max_read_size) { 6830 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6831 max_read_size); 6832 err = -EINVAL; 6833 goto out; 6834 } 6835 6836 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6837 fp->filp, offset, length); 6838 6839 aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP); 6840 if (!aux_payload_buf) { 6841 err = -ENOMEM; 6842 goto out; 6843 } 6844 6845 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6846 if (nbytes < 0) { 6847 kvfree(aux_payload_buf); 6848 err = nbytes; 6849 goto out; 6850 } 6851 6852 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6853 kvfree(aux_payload_buf); 6854 rsp->hdr.Status = STATUS_END_OF_FILE; 6855 smb2_set_err_rsp(work); 6856 ksmbd_fd_put(work, fp); 6857 return -ENODATA; 6858 } 6859 6860 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6861 nbytes, offset, mincount); 6862 6863 if (is_rdma_channel == true) { 6864 /* write data to the client using rdma channel */ 6865 remain_bytes = smb2_read_rdma_channel(work, req, 6866 aux_payload_buf, 6867 nbytes); 6868 kvfree(aux_payload_buf); 6869 aux_payload_buf = NULL; 6870 nbytes = 0; 6871 if (remain_bytes < 0) { 6872 err = (int)remain_bytes; 6873 goto out; 6874 } 6875 } 6876 6877 rsp->StructureSize = cpu_to_le16(17); 6878 rsp->DataOffset = 80; 6879 rsp->Reserved = 0; 6880 rsp->DataLength = cpu_to_le32(nbytes); 6881 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6882 rsp->Flags = 0; 6883 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6884 offsetof(struct smb2_read_rsp, Buffer), 6885 aux_payload_buf, nbytes); 6886 if (err) { 6887 kvfree(aux_payload_buf); 6888 goto out; 6889 } 6890 ksmbd_fd_put(work, fp); 6891 return 0; 6892 6893 out: 6894 if (err) { 6895 if (err == -EISDIR) 6896 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6897 else if (err == -EAGAIN) 6898 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6899 else if (err == -ENOENT) 6900 rsp->hdr.Status = STATUS_FILE_CLOSED; 6901 else if (err == -EACCES) 6902 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6903 else if (err == -ESHARE) 6904 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6905 else if (err == -EINVAL) 6906 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6907 else 6908 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6909 6910 smb2_set_err_rsp(work); 6911 } 6912 ksmbd_fd_put(work, fp); 6913 return err; 6914 } 6915 6916 /** 6917 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6918 * @work: smb work containing write IPC pipe command buffer 6919 * 6920 * Return: 0 on success, otherwise error 6921 */ 6922 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6923 { 6924 struct smb2_write_req *req; 6925 struct smb2_write_rsp *rsp; 6926 struct ksmbd_rpc_command *rpc_resp; 6927 u64 id = 0; 6928 int err = 0, ret = 0; 6929 char *data_buf; 6930 size_t length; 6931 6932 WORK_BUFFERS(work, req, rsp); 6933 6934 length = le32_to_cpu(req->Length); 6935 id = req->VolatileFileId; 6936 6937 if ((u64)le16_to_cpu(req->DataOffset) + length > 6938 get_rfc1002_len(work->request_buf)) { 6939 pr_err("invalid write data offset %u, smb_len %u\n", 6940 le16_to_cpu(req->DataOffset), 6941 get_rfc1002_len(work->request_buf)); 6942 err = -EINVAL; 6943 goto out; 6944 } 6945 6946 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6947 le16_to_cpu(req->DataOffset)); 6948 6949 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6950 if (rpc_resp) { 6951 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6952 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6953 kvfree(rpc_resp); 6954 smb2_set_err_rsp(work); 6955 return -EOPNOTSUPP; 6956 } 6957 if (rpc_resp->flags != KSMBD_RPC_OK) { 6958 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6959 smb2_set_err_rsp(work); 6960 kvfree(rpc_resp); 6961 return ret; 6962 } 6963 kvfree(rpc_resp); 6964 } 6965 6966 rsp->StructureSize = cpu_to_le16(17); 6967 rsp->DataOffset = 0; 6968 rsp->Reserved = 0; 6969 rsp->DataLength = cpu_to_le32(length); 6970 rsp->DataRemaining = 0; 6971 rsp->Reserved2 = 0; 6972 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6973 offsetof(struct smb2_write_rsp, Buffer)); 6974 out: 6975 if (err) { 6976 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6977 smb2_set_err_rsp(work); 6978 } 6979 6980 return err; 6981 } 6982 6983 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6984 struct smb2_write_req *req, 6985 struct ksmbd_file *fp, 6986 loff_t offset, size_t length, bool sync) 6987 { 6988 char *data_buf; 6989 int ret; 6990 ssize_t nbytes; 6991 6992 data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP); 6993 if (!data_buf) 6994 return -ENOMEM; 6995 6996 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6997 (struct smbdirect_buffer_descriptor_v1 *) 6998 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6999 le16_to_cpu(req->WriteChannelInfoLength)); 7000 if (ret < 0) { 7001 kvfree(data_buf); 7002 return ret; 7003 } 7004 7005 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 7006 kvfree(data_buf); 7007 if (ret < 0) 7008 return ret; 7009 7010 return nbytes; 7011 } 7012 7013 /** 7014 * smb2_write() - handler for smb2 write from file 7015 * @work: smb work containing write command buffer 7016 * 7017 * Return: 0 on success, otherwise error 7018 */ 7019 int smb2_write(struct ksmbd_work *work) 7020 { 7021 struct smb2_write_req *req; 7022 struct smb2_write_rsp *rsp; 7023 struct ksmbd_file *fp = NULL; 7024 loff_t offset; 7025 size_t length; 7026 ssize_t nbytes; 7027 char *data_buf; 7028 bool writethrough = false, is_rdma_channel = false; 7029 int err = 0; 7030 unsigned int max_write_size = work->conn->vals->max_write_size; 7031 7032 ksmbd_debug(SMB, "Received smb2 write request\n"); 7033 7034 WORK_BUFFERS(work, req, rsp); 7035 7036 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 7037 ksmbd_debug(SMB, "IPC pipe write request\n"); 7038 return smb2_write_pipe(work); 7039 } 7040 7041 offset = le64_to_cpu(req->Offset); 7042 if (offset < 0) 7043 return -EINVAL; 7044 length = le32_to_cpu(req->Length); 7045 7046 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 7047 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 7048 is_rdma_channel = true; 7049 max_write_size = get_smbd_max_read_write_size(work->conn->transport); 7050 if (max_write_size == 0) { 7051 err = -EINVAL; 7052 goto out; 7053 } 7054 length = le32_to_cpu(req->RemainingBytes); 7055 } 7056 7057 if (is_rdma_channel == true) { 7058 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 7059 7060 if (req->Length != 0 || req->DataOffset != 0 || 7061 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 7062 err = -EINVAL; 7063 goto out; 7064 } 7065 err = smb2_set_remote_key_for_rdma(work, 7066 (struct smbdirect_buffer_descriptor_v1 *) 7067 ((char *)req + ch_offset), 7068 req->Channel, 7069 req->WriteChannelInfoLength); 7070 if (err) 7071 goto out; 7072 } 7073 7074 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7075 ksmbd_debug(SMB, "User does not have write permission\n"); 7076 err = -EACCES; 7077 goto out; 7078 } 7079 7080 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7081 if (!fp) { 7082 err = -ENOENT; 7083 goto out; 7084 } 7085 7086 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 7087 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 7088 err = -EACCES; 7089 goto out; 7090 } 7091 7092 if (length > max_write_size) { 7093 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 7094 max_write_size); 7095 err = -EINVAL; 7096 goto out; 7097 } 7098 7099 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 7100 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 7101 writethrough = true; 7102 7103 if (is_rdma_channel == false) { 7104 if (le16_to_cpu(req->DataOffset) < 7105 offsetof(struct smb2_write_req, Buffer)) { 7106 err = -EINVAL; 7107 goto out; 7108 } 7109 7110 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7111 le16_to_cpu(req->DataOffset)); 7112 7113 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 7114 fp->filp, offset, length); 7115 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 7116 writethrough, &nbytes); 7117 if (err < 0) 7118 goto out; 7119 } else { 7120 /* read data from the client using rdma channel, and 7121 * write the data. 7122 */ 7123 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 7124 writethrough); 7125 if (nbytes < 0) { 7126 err = (int)nbytes; 7127 goto out; 7128 } 7129 } 7130 7131 rsp->StructureSize = cpu_to_le16(17); 7132 rsp->DataOffset = 0; 7133 rsp->Reserved = 0; 7134 rsp->DataLength = cpu_to_le32(nbytes); 7135 rsp->DataRemaining = 0; 7136 rsp->Reserved2 = 0; 7137 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 7138 if (err) 7139 goto out; 7140 ksmbd_fd_put(work, fp); 7141 return 0; 7142 7143 out: 7144 if (err == -EAGAIN) 7145 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7146 else if (err == -ENOSPC || err == -EFBIG) 7147 rsp->hdr.Status = STATUS_DISK_FULL; 7148 else if (err == -ENOENT) 7149 rsp->hdr.Status = STATUS_FILE_CLOSED; 7150 else if (err == -EACCES) 7151 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7152 else if (err == -ESHARE) 7153 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 7154 else if (err == -EINVAL) 7155 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7156 else 7157 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7158 7159 smb2_set_err_rsp(work); 7160 ksmbd_fd_put(work, fp); 7161 return err; 7162 } 7163 7164 /** 7165 * smb2_flush() - handler for smb2 flush file - fsync 7166 * @work: smb work containing flush command buffer 7167 * 7168 * Return: 0 on success, otherwise error 7169 */ 7170 int smb2_flush(struct ksmbd_work *work) 7171 { 7172 struct smb2_flush_req *req; 7173 struct smb2_flush_rsp *rsp; 7174 int err; 7175 7176 WORK_BUFFERS(work, req, rsp); 7177 7178 ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId); 7179 7180 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 7181 if (err) 7182 goto out; 7183 7184 rsp->StructureSize = cpu_to_le16(4); 7185 rsp->Reserved = 0; 7186 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 7187 7188 out: 7189 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7190 smb2_set_err_rsp(work); 7191 return err; 7192 } 7193 7194 /** 7195 * smb2_cancel() - handler for smb2 cancel command 7196 * @work: smb work containing cancel command buffer 7197 * 7198 * Return: 0 on success, otherwise error 7199 */ 7200 int smb2_cancel(struct ksmbd_work *work) 7201 { 7202 struct ksmbd_conn *conn = work->conn; 7203 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 7204 struct smb2_hdr *chdr; 7205 struct ksmbd_work *iter; 7206 struct list_head *command_list; 7207 7208 if (work->next_smb2_rcv_hdr_off) 7209 hdr = ksmbd_resp_buf_next(work); 7210 7211 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 7212 hdr->MessageId, hdr->Flags); 7213 7214 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 7215 command_list = &conn->async_requests; 7216 7217 spin_lock(&conn->request_lock); 7218 list_for_each_entry(iter, command_list, 7219 async_request_entry) { 7220 chdr = smb_get_msg(iter->request_buf); 7221 7222 if (iter->async_id != 7223 le64_to_cpu(hdr->Id.AsyncId)) 7224 continue; 7225 7226 ksmbd_debug(SMB, 7227 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 7228 le64_to_cpu(hdr->Id.AsyncId), 7229 le16_to_cpu(chdr->Command)); 7230 iter->state = KSMBD_WORK_CANCELLED; 7231 if (iter->cancel_fn) 7232 iter->cancel_fn(iter->cancel_argv); 7233 break; 7234 } 7235 spin_unlock(&conn->request_lock); 7236 } else { 7237 command_list = &conn->requests; 7238 7239 spin_lock(&conn->request_lock); 7240 list_for_each_entry(iter, command_list, request_entry) { 7241 chdr = smb_get_msg(iter->request_buf); 7242 7243 if (chdr->MessageId != hdr->MessageId || 7244 iter == work) 7245 continue; 7246 7247 ksmbd_debug(SMB, 7248 "smb2 with mid %llu cancelled command = 0x%x\n", 7249 le64_to_cpu(hdr->MessageId), 7250 le16_to_cpu(chdr->Command)); 7251 iter->state = KSMBD_WORK_CANCELLED; 7252 break; 7253 } 7254 spin_unlock(&conn->request_lock); 7255 } 7256 7257 /* For SMB2_CANCEL command itself send no response*/ 7258 work->send_no_response = 1; 7259 return 0; 7260 } 7261 7262 struct file_lock *smb_flock_init(struct file *f) 7263 { 7264 struct file_lock *fl; 7265 7266 fl = locks_alloc_lock(); 7267 if (!fl) 7268 goto out; 7269 7270 locks_init_lock(fl); 7271 7272 fl->c.flc_owner = f; 7273 fl->c.flc_pid = current->tgid; 7274 fl->c.flc_file = f; 7275 fl->c.flc_flags = FL_POSIX; 7276 fl->fl_ops = NULL; 7277 fl->fl_lmops = NULL; 7278 7279 out: 7280 return fl; 7281 } 7282 7283 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 7284 { 7285 int cmd = -EINVAL; 7286 7287 /* Checking for wrong flag combination during lock request*/ 7288 switch (flags) { 7289 case SMB2_LOCKFLAG_SHARED: 7290 ksmbd_debug(SMB, "received shared request\n"); 7291 cmd = F_SETLKW; 7292 flock->c.flc_type = F_RDLCK; 7293 flock->c.flc_flags |= FL_SLEEP; 7294 break; 7295 case SMB2_LOCKFLAG_EXCLUSIVE: 7296 ksmbd_debug(SMB, "received exclusive request\n"); 7297 cmd = F_SETLKW; 7298 flock->c.flc_type = F_WRLCK; 7299 flock->c.flc_flags |= FL_SLEEP; 7300 break; 7301 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7302 ksmbd_debug(SMB, 7303 "received shared & fail immediately request\n"); 7304 cmd = F_SETLK; 7305 flock->c.flc_type = F_RDLCK; 7306 break; 7307 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7308 ksmbd_debug(SMB, 7309 "received exclusive & fail immediately request\n"); 7310 cmd = F_SETLK; 7311 flock->c.flc_type = F_WRLCK; 7312 break; 7313 case SMB2_LOCKFLAG_UNLOCK: 7314 ksmbd_debug(SMB, "received unlock request\n"); 7315 flock->c.flc_type = F_UNLCK; 7316 cmd = F_SETLK; 7317 break; 7318 } 7319 7320 return cmd; 7321 } 7322 7323 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 7324 unsigned int cmd, int flags, 7325 struct list_head *lock_list) 7326 { 7327 struct ksmbd_lock *lock; 7328 7329 lock = kzalloc(sizeof(struct ksmbd_lock), KSMBD_DEFAULT_GFP); 7330 if (!lock) 7331 return NULL; 7332 7333 lock->cmd = cmd; 7334 lock->fl = flock; 7335 lock->start = flock->fl_start; 7336 lock->end = flock->fl_end; 7337 lock->flags = flags; 7338 if (lock->start == lock->end) 7339 lock->zero_len = 1; 7340 INIT_LIST_HEAD(&lock->clist); 7341 INIT_LIST_HEAD(&lock->flist); 7342 INIT_LIST_HEAD(&lock->llist); 7343 list_add_tail(&lock->llist, lock_list); 7344 7345 return lock; 7346 } 7347 7348 static void smb2_remove_blocked_lock(void **argv) 7349 { 7350 struct file_lock *flock = (struct file_lock *)argv[0]; 7351 7352 ksmbd_vfs_posix_lock_unblock(flock); 7353 locks_wake_up(flock); 7354 } 7355 7356 static inline bool lock_defer_pending(struct file_lock *fl) 7357 { 7358 /* check pending lock waiters */ 7359 return waitqueue_active(&fl->c.flc_wait); 7360 } 7361 7362 /** 7363 * smb2_lock() - handler for smb2 file lock command 7364 * @work: smb work containing lock command buffer 7365 * 7366 * Return: 0 on success, otherwise error 7367 */ 7368 int smb2_lock(struct ksmbd_work *work) 7369 { 7370 struct smb2_lock_req *req; 7371 struct smb2_lock_rsp *rsp; 7372 struct smb2_lock_element *lock_ele; 7373 struct ksmbd_file *fp = NULL; 7374 struct file_lock *flock = NULL; 7375 struct file *filp = NULL; 7376 int lock_count; 7377 int flags = 0; 7378 int cmd = 0; 7379 int err = -EIO, i, rc = 0; 7380 u64 lock_start, lock_length; 7381 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 7382 struct ksmbd_conn *conn; 7383 int nolock = 0; 7384 LIST_HEAD(lock_list); 7385 LIST_HEAD(rollback_list); 7386 int prior_lock = 0, bkt; 7387 7388 WORK_BUFFERS(work, req, rsp); 7389 7390 ksmbd_debug(SMB, "Received smb2 lock request\n"); 7391 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7392 if (!fp) { 7393 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 7394 err = -ENOENT; 7395 goto out2; 7396 } 7397 7398 filp = fp->filp; 7399 lock_count = le16_to_cpu(req->LockCount); 7400 lock_ele = req->locks; 7401 7402 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 7403 if (!lock_count) { 7404 err = -EINVAL; 7405 goto out2; 7406 } 7407 7408 for (i = 0; i < lock_count; i++) { 7409 flags = le32_to_cpu(lock_ele[i].Flags); 7410 7411 flock = smb_flock_init(filp); 7412 if (!flock) 7413 goto out; 7414 7415 cmd = smb2_set_flock_flags(flock, flags); 7416 7417 lock_start = le64_to_cpu(lock_ele[i].Offset); 7418 lock_length = le64_to_cpu(lock_ele[i].Length); 7419 if (lock_start > U64_MAX - lock_length) { 7420 pr_err("Invalid lock range requested\n"); 7421 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7422 locks_free_lock(flock); 7423 goto out; 7424 } 7425 7426 if (lock_start > OFFSET_MAX) 7427 flock->fl_start = OFFSET_MAX; 7428 else 7429 flock->fl_start = lock_start; 7430 7431 lock_length = le64_to_cpu(lock_ele[i].Length); 7432 if (lock_length > OFFSET_MAX - flock->fl_start) 7433 lock_length = OFFSET_MAX - flock->fl_start; 7434 7435 flock->fl_end = flock->fl_start + lock_length; 7436 7437 if (flock->fl_end < flock->fl_start) { 7438 ksmbd_debug(SMB, 7439 "the end offset(%llx) is smaller than the start offset(%llx)\n", 7440 flock->fl_end, flock->fl_start); 7441 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7442 locks_free_lock(flock); 7443 goto out; 7444 } 7445 7446 /* Check conflict locks in one request */ 7447 list_for_each_entry(cmp_lock, &lock_list, llist) { 7448 if (cmp_lock->fl->fl_start <= flock->fl_start && 7449 cmp_lock->fl->fl_end >= flock->fl_end) { 7450 if (cmp_lock->fl->c.flc_type != F_UNLCK && 7451 flock->c.flc_type != F_UNLCK) { 7452 pr_err("conflict two locks in one request\n"); 7453 err = -EINVAL; 7454 locks_free_lock(flock); 7455 goto out; 7456 } 7457 } 7458 } 7459 7460 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 7461 if (!smb_lock) { 7462 err = -EINVAL; 7463 locks_free_lock(flock); 7464 goto out; 7465 } 7466 } 7467 7468 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7469 if (smb_lock->cmd < 0) { 7470 err = -EINVAL; 7471 goto out; 7472 } 7473 7474 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 7475 err = -EINVAL; 7476 goto out; 7477 } 7478 7479 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 7480 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 7481 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 7482 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 7483 err = -EINVAL; 7484 goto out; 7485 } 7486 7487 prior_lock = smb_lock->flags; 7488 7489 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 7490 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 7491 goto no_check_cl; 7492 7493 nolock = 1; 7494 /* check locks in connection list */ 7495 down_read(&conn_list_lock); 7496 hash_for_each(conn_list, bkt, conn, hlist) { 7497 spin_lock(&conn->llist_lock); 7498 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 7499 if (file_inode(cmp_lock->fl->c.flc_file) != 7500 file_inode(smb_lock->fl->c.flc_file)) 7501 continue; 7502 7503 if (lock_is_unlock(smb_lock->fl)) { 7504 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && 7505 cmp_lock->start == smb_lock->start && 7506 cmp_lock->end == smb_lock->end && 7507 !lock_defer_pending(cmp_lock->fl)) { 7508 nolock = 0; 7509 list_del(&cmp_lock->flist); 7510 list_del(&cmp_lock->clist); 7511 spin_unlock(&conn->llist_lock); 7512 up_read(&conn_list_lock); 7513 7514 locks_free_lock(cmp_lock->fl); 7515 kfree(cmp_lock); 7516 goto out_check_cl; 7517 } 7518 continue; 7519 } 7520 7521 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { 7522 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7523 continue; 7524 } else { 7525 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7526 continue; 7527 } 7528 7529 /* check zero byte lock range */ 7530 if (cmp_lock->zero_len && !smb_lock->zero_len && 7531 cmp_lock->start > smb_lock->start && 7532 cmp_lock->start < smb_lock->end) { 7533 spin_unlock(&conn->llist_lock); 7534 up_read(&conn_list_lock); 7535 pr_err("previous lock conflict with zero byte lock range\n"); 7536 goto out; 7537 } 7538 7539 if (smb_lock->zero_len && !cmp_lock->zero_len && 7540 smb_lock->start > cmp_lock->start && 7541 smb_lock->start < cmp_lock->end) { 7542 spin_unlock(&conn->llist_lock); 7543 up_read(&conn_list_lock); 7544 pr_err("current lock conflict with zero byte lock range\n"); 7545 goto out; 7546 } 7547 7548 if (((cmp_lock->start <= smb_lock->start && 7549 cmp_lock->end > smb_lock->start) || 7550 (cmp_lock->start < smb_lock->end && 7551 cmp_lock->end >= smb_lock->end)) && 7552 !cmp_lock->zero_len && !smb_lock->zero_len) { 7553 spin_unlock(&conn->llist_lock); 7554 up_read(&conn_list_lock); 7555 pr_err("Not allow lock operation on exclusive lock range\n"); 7556 goto out; 7557 } 7558 } 7559 spin_unlock(&conn->llist_lock); 7560 } 7561 up_read(&conn_list_lock); 7562 out_check_cl: 7563 if (lock_is_unlock(smb_lock->fl) && nolock) { 7564 pr_err("Try to unlock nolocked range\n"); 7565 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7566 goto out; 7567 } 7568 7569 no_check_cl: 7570 flock = smb_lock->fl; 7571 list_del(&smb_lock->llist); 7572 7573 if (smb_lock->zero_len) { 7574 err = 0; 7575 goto skip; 7576 } 7577 retry: 7578 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7579 skip: 7580 if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) { 7581 if (!rc) { 7582 ksmbd_debug(SMB, "File unlocked\n"); 7583 } else if (rc == -ENOENT) { 7584 rsp->hdr.Status = STATUS_NOT_LOCKED; 7585 goto out; 7586 } 7587 locks_free_lock(flock); 7588 kfree(smb_lock); 7589 } else { 7590 if (rc == FILE_LOCK_DEFERRED) { 7591 void **argv; 7592 7593 ksmbd_debug(SMB, 7594 "would have to wait for getting lock\n"); 7595 list_add(&smb_lock->llist, &rollback_list); 7596 7597 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP); 7598 if (!argv) { 7599 err = -ENOMEM; 7600 goto out; 7601 } 7602 argv[0] = flock; 7603 7604 rc = setup_async_work(work, 7605 smb2_remove_blocked_lock, 7606 argv); 7607 if (rc) { 7608 kfree(argv); 7609 err = -ENOMEM; 7610 goto out; 7611 } 7612 spin_lock(&fp->f_lock); 7613 list_add(&work->fp_entry, &fp->blocked_works); 7614 spin_unlock(&fp->f_lock); 7615 7616 smb2_send_interim_resp(work, STATUS_PENDING); 7617 7618 ksmbd_vfs_posix_lock_wait(flock); 7619 7620 spin_lock(&fp->f_lock); 7621 list_del(&work->fp_entry); 7622 spin_unlock(&fp->f_lock); 7623 7624 if (work->state != KSMBD_WORK_ACTIVE) { 7625 list_del(&smb_lock->llist); 7626 locks_free_lock(flock); 7627 7628 if (work->state == KSMBD_WORK_CANCELLED) { 7629 rsp->hdr.Status = 7630 STATUS_CANCELLED; 7631 kfree(smb_lock); 7632 smb2_send_interim_resp(work, 7633 STATUS_CANCELLED); 7634 work->send_no_response = 1; 7635 goto out; 7636 } 7637 7638 rsp->hdr.Status = 7639 STATUS_RANGE_NOT_LOCKED; 7640 kfree(smb_lock); 7641 goto out2; 7642 } 7643 7644 list_del(&smb_lock->llist); 7645 release_async_work(work); 7646 goto retry; 7647 } else if (!rc) { 7648 list_add(&smb_lock->llist, &rollback_list); 7649 spin_lock(&work->conn->llist_lock); 7650 list_add_tail(&smb_lock->clist, 7651 &work->conn->lock_list); 7652 list_add_tail(&smb_lock->flist, 7653 &fp->lock_list); 7654 spin_unlock(&work->conn->llist_lock); 7655 ksmbd_debug(SMB, "successful in taking lock\n"); 7656 } else { 7657 goto out; 7658 } 7659 } 7660 } 7661 7662 if (atomic_read(&fp->f_ci->op_count) > 1) 7663 smb_break_all_oplock(work, fp); 7664 7665 rsp->StructureSize = cpu_to_le16(4); 7666 ksmbd_debug(SMB, "successful in taking lock\n"); 7667 rsp->hdr.Status = STATUS_SUCCESS; 7668 rsp->Reserved = 0; 7669 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7670 if (err) 7671 goto out; 7672 7673 ksmbd_fd_put(work, fp); 7674 return 0; 7675 7676 out: 7677 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7678 locks_free_lock(smb_lock->fl); 7679 list_del(&smb_lock->llist); 7680 kfree(smb_lock); 7681 } 7682 7683 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7684 struct file_lock *rlock = NULL; 7685 7686 rlock = smb_flock_init(filp); 7687 rlock->c.flc_type = F_UNLCK; 7688 rlock->fl_start = smb_lock->start; 7689 rlock->fl_end = smb_lock->end; 7690 7691 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7692 if (rc) 7693 pr_err("rollback unlock fail : %d\n", rc); 7694 7695 list_del(&smb_lock->llist); 7696 spin_lock(&work->conn->llist_lock); 7697 if (!list_empty(&smb_lock->flist)) 7698 list_del(&smb_lock->flist); 7699 list_del(&smb_lock->clist); 7700 spin_unlock(&work->conn->llist_lock); 7701 7702 locks_free_lock(smb_lock->fl); 7703 locks_free_lock(rlock); 7704 kfree(smb_lock); 7705 } 7706 out2: 7707 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7708 7709 if (!rsp->hdr.Status) { 7710 if (err == -EINVAL) 7711 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7712 else if (err == -ENOMEM) 7713 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7714 else if (err == -ENOENT) 7715 rsp->hdr.Status = STATUS_FILE_CLOSED; 7716 else 7717 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7718 } 7719 7720 smb2_set_err_rsp(work); 7721 ksmbd_fd_put(work, fp); 7722 return err; 7723 } 7724 7725 static int fsctl_copychunk(struct ksmbd_work *work, 7726 struct copychunk_ioctl_req *ci_req, 7727 unsigned int cnt_code, 7728 unsigned int input_count, 7729 unsigned long long volatile_id, 7730 unsigned long long persistent_id, 7731 struct smb2_ioctl_rsp *rsp) 7732 { 7733 struct copychunk_ioctl_rsp *ci_rsp; 7734 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7735 struct srv_copychunk *chunks; 7736 unsigned int i, chunk_count, chunk_count_written = 0; 7737 unsigned int chunk_size_written = 0; 7738 loff_t total_size_written = 0; 7739 int ret = 0; 7740 7741 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7742 7743 rsp->VolatileFileId = volatile_id; 7744 rsp->PersistentFileId = persistent_id; 7745 ci_rsp->ChunksWritten = 7746 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7747 ci_rsp->ChunkBytesWritten = 7748 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7749 ci_rsp->TotalBytesWritten = 7750 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7751 7752 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7753 if (chunk_count == 0) 7754 goto out; 7755 total_size_written = 0; 7756 7757 /* verify the SRV_COPYCHUNK_COPY packet */ 7758 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7759 input_count < struct_size(ci_req, Chunks, chunk_count)) { 7760 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7761 return -EINVAL; 7762 } 7763 7764 chunks = &ci_req->Chunks[0]; 7765 for (i = 0; i < chunk_count; i++) { 7766 if (le32_to_cpu(chunks[i].Length) == 0 || 7767 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7768 break; 7769 total_size_written += le32_to_cpu(chunks[i].Length); 7770 } 7771 7772 if (i < chunk_count || 7773 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7774 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7775 return -EINVAL; 7776 } 7777 7778 src_fp = ksmbd_lookup_foreign_fd(work, 7779 le64_to_cpu(ci_req->SourceKeyU64[0])); 7780 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7781 ret = -EINVAL; 7782 if (!src_fp || 7783 src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) { 7784 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7785 goto out; 7786 } 7787 7788 if (!dst_fp) { 7789 rsp->hdr.Status = STATUS_FILE_CLOSED; 7790 goto out; 7791 } 7792 7793 /* 7794 * FILE_READ_DATA should only be included in 7795 * the FSCTL_COPYCHUNK case 7796 */ 7797 if (cnt_code == FSCTL_COPYCHUNK && 7798 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7799 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7800 goto out; 7801 } 7802 7803 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7804 chunks, chunk_count, 7805 &chunk_count_written, 7806 &chunk_size_written, 7807 &total_size_written); 7808 if (ret < 0) { 7809 if (ret == -EACCES) 7810 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7811 if (ret == -EAGAIN) 7812 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7813 else if (ret == -EBADF) 7814 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7815 else if (ret == -EFBIG || ret == -ENOSPC) 7816 rsp->hdr.Status = STATUS_DISK_FULL; 7817 else if (ret == -EINVAL) 7818 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7819 else if (ret == -EISDIR) 7820 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7821 else if (ret == -E2BIG) 7822 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7823 else 7824 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7825 } 7826 7827 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7828 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7829 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7830 out: 7831 ksmbd_fd_put(work, src_fp); 7832 ksmbd_fd_put(work, dst_fp); 7833 return ret; 7834 } 7835 7836 static __be32 idev_ipv4_address(struct in_device *idev) 7837 { 7838 __be32 addr = 0; 7839 7840 struct in_ifaddr *ifa; 7841 7842 rcu_read_lock(); 7843 in_dev_for_each_ifa_rcu(ifa, idev) { 7844 if (ifa->ifa_flags & IFA_F_SECONDARY) 7845 continue; 7846 7847 addr = ifa->ifa_address; 7848 break; 7849 } 7850 rcu_read_unlock(); 7851 return addr; 7852 } 7853 7854 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7855 struct smb2_ioctl_rsp *rsp, 7856 unsigned int out_buf_len) 7857 { 7858 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7859 int nbytes = 0; 7860 struct net_device *netdev; 7861 struct sockaddr_storage_rsp *sockaddr_storage; 7862 unsigned int flags; 7863 unsigned long long speed; 7864 7865 rtnl_lock(); 7866 for_each_netdev(&init_net, netdev) { 7867 bool ipv4_set = false; 7868 7869 if (netdev->type == ARPHRD_LOOPBACK) 7870 continue; 7871 7872 if (!ksmbd_find_netdev_name_iface_list(netdev->name)) 7873 continue; 7874 7875 flags = netif_get_flags(netdev); 7876 if (!(flags & IFF_RUNNING)) 7877 continue; 7878 ipv6_retry: 7879 if (out_buf_len < 7880 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7881 rtnl_unlock(); 7882 return -ENOSPC; 7883 } 7884 7885 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7886 &rsp->Buffer[nbytes]; 7887 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7888 7889 nii_rsp->Capability = 0; 7890 if (netdev->real_num_tx_queues > 1) 7891 nii_rsp->Capability |= RSS_CAPABLE; 7892 if (ksmbd_rdma_capable_netdev(netdev)) 7893 nii_rsp->Capability |= RDMA_CAPABLE; 7894 7895 nii_rsp->Next = cpu_to_le32(152); 7896 nii_rsp->Reserved = 0; 7897 7898 if (netdev->ethtool_ops->get_link_ksettings) { 7899 struct ethtool_link_ksettings cmd; 7900 7901 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7902 speed = cmd.base.speed; 7903 } else { 7904 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7905 "speed is unknown, defaulting to 1Gb/sec"); 7906 speed = SPEED_1000; 7907 } 7908 7909 speed *= 1000000; 7910 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7911 7912 sockaddr_storage = (struct sockaddr_storage_rsp *) 7913 nii_rsp->SockAddr_Storage; 7914 memset(sockaddr_storage, 0, 128); 7915 7916 if (!ipv4_set) { 7917 struct in_device *idev; 7918 7919 sockaddr_storage->Family = INTERNETWORK; 7920 sockaddr_storage->addr4.Port = 0; 7921 7922 idev = __in_dev_get_rtnl(netdev); 7923 if (!idev) 7924 continue; 7925 sockaddr_storage->addr4.IPv4Address = 7926 idev_ipv4_address(idev); 7927 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7928 ipv4_set = true; 7929 goto ipv6_retry; 7930 } else { 7931 struct inet6_dev *idev6; 7932 struct inet6_ifaddr *ifa; 7933 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6Address; 7934 7935 sockaddr_storage->Family = INTERNETWORKV6; 7936 sockaddr_storage->addr6.Port = 0; 7937 sockaddr_storage->addr6.FlowInfo = 0; 7938 7939 idev6 = __in6_dev_get(netdev); 7940 if (!idev6) 7941 continue; 7942 7943 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7944 if (ifa->flags & (IFA_F_TENTATIVE | 7945 IFA_F_DEPRECATED)) 7946 continue; 7947 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7948 break; 7949 } 7950 sockaddr_storage->addr6.ScopeId = 0; 7951 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7952 } 7953 } 7954 rtnl_unlock(); 7955 7956 /* zero if this is last one */ 7957 if (nii_rsp) 7958 nii_rsp->Next = 0; 7959 7960 rsp->PersistentFileId = SMB2_NO_FID; 7961 rsp->VolatileFileId = SMB2_NO_FID; 7962 return nbytes; 7963 } 7964 7965 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7966 struct validate_negotiate_info_req *neg_req, 7967 struct validate_negotiate_info_rsp *neg_rsp, 7968 unsigned int in_buf_len) 7969 { 7970 int ret = 0; 7971 int dialect; 7972 7973 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7974 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7975 return -EINVAL; 7976 7977 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7978 neg_req->DialectCount); 7979 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7980 ret = -EINVAL; 7981 goto err_out; 7982 } 7983 7984 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7985 ret = -EINVAL; 7986 goto err_out; 7987 } 7988 7989 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7990 ret = -EINVAL; 7991 goto err_out; 7992 } 7993 7994 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7995 ret = -EINVAL; 7996 goto err_out; 7997 } 7998 7999 neg_rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 8000 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 8001 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 8002 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 8003 err_out: 8004 return ret; 8005 } 8006 8007 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 8008 struct file_allocated_range_buffer *qar_req, 8009 struct file_allocated_range_buffer *qar_rsp, 8010 unsigned int in_count, unsigned int *out_count) 8011 { 8012 struct ksmbd_file *fp; 8013 loff_t start, length; 8014 int ret = 0; 8015 8016 *out_count = 0; 8017 if (in_count == 0) 8018 return -EINVAL; 8019 8020 start = le64_to_cpu(qar_req->file_offset); 8021 length = le64_to_cpu(qar_req->length); 8022 8023 if (start < 0 || length < 0) 8024 return -EINVAL; 8025 8026 fp = ksmbd_lookup_fd_fast(work, id); 8027 if (!fp) 8028 return -ENOENT; 8029 8030 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 8031 qar_rsp, in_count, out_count); 8032 if (ret && ret != -E2BIG) 8033 *out_count = 0; 8034 8035 ksmbd_fd_put(work, fp); 8036 return ret; 8037 } 8038 8039 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 8040 unsigned int out_buf_len, 8041 struct smb2_ioctl_req *req, 8042 struct smb2_ioctl_rsp *rsp) 8043 { 8044 struct ksmbd_rpc_command *rpc_resp; 8045 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); 8046 int nbytes = 0; 8047 8048 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 8049 le32_to_cpu(req->InputCount)); 8050 if (rpc_resp) { 8051 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 8052 /* 8053 * set STATUS_SOME_NOT_MAPPED response 8054 * for unknown domain sid. 8055 */ 8056 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 8057 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 8058 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8059 goto out; 8060 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 8061 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8062 goto out; 8063 } 8064 8065 nbytes = rpc_resp->payload_sz; 8066 if (rpc_resp->payload_sz > out_buf_len) { 8067 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8068 nbytes = out_buf_len; 8069 } 8070 8071 if (!rpc_resp->payload_sz) { 8072 rsp->hdr.Status = 8073 STATUS_UNEXPECTED_IO_ERROR; 8074 goto out; 8075 } 8076 8077 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 8078 } 8079 out: 8080 kvfree(rpc_resp); 8081 return nbytes; 8082 } 8083 8084 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 8085 struct file_sparse *sparse) 8086 { 8087 struct ksmbd_file *fp; 8088 struct mnt_idmap *idmap; 8089 int ret = 0; 8090 __le32 old_fattr; 8091 8092 fp = ksmbd_lookup_fd_fast(work, id); 8093 if (!fp) 8094 return -ENOENT; 8095 idmap = file_mnt_idmap(fp->filp); 8096 8097 old_fattr = fp->f_ci->m_fattr; 8098 if (sparse->SetSparse) 8099 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 8100 else 8101 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 8102 8103 if (fp->f_ci->m_fattr != old_fattr && 8104 test_share_config_flag(work->tcon->share_conf, 8105 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 8106 struct xattr_dos_attrib da; 8107 8108 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 8109 fp->filp->f_path.dentry, &da); 8110 if (ret <= 0) 8111 goto out; 8112 8113 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 8114 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 8115 &fp->filp->f_path, 8116 &da, true); 8117 if (ret) 8118 fp->f_ci->m_fattr = old_fattr; 8119 } 8120 8121 out: 8122 ksmbd_fd_put(work, fp); 8123 return ret; 8124 } 8125 8126 static int fsctl_request_resume_key(struct ksmbd_work *work, 8127 struct smb2_ioctl_req *req, 8128 struct resume_key_ioctl_rsp *key_rsp) 8129 { 8130 struct ksmbd_file *fp; 8131 8132 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 8133 if (!fp) 8134 return -ENOENT; 8135 8136 memset(key_rsp, 0, sizeof(*key_rsp)); 8137 key_rsp->ResumeKeyU64[0] = req->VolatileFileId; 8138 key_rsp->ResumeKeyU64[1] = req->PersistentFileId; 8139 ksmbd_fd_put(work, fp); 8140 8141 return 0; 8142 } 8143 8144 /** 8145 * smb2_ioctl() - handler for smb2 ioctl command 8146 * @work: smb work containing ioctl command buffer 8147 * 8148 * Return: 0 on success, otherwise error 8149 */ 8150 int smb2_ioctl(struct ksmbd_work *work) 8151 { 8152 struct smb2_ioctl_req *req; 8153 struct smb2_ioctl_rsp *rsp; 8154 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 8155 u64 id = KSMBD_NO_FID; 8156 struct ksmbd_conn *conn = work->conn; 8157 int ret = 0; 8158 char *buffer; 8159 8160 ksmbd_debug(SMB, "Received smb2 ioctl request\n"); 8161 8162 if (work->next_smb2_rcv_hdr_off) { 8163 req = ksmbd_req_buf_next(work); 8164 rsp = ksmbd_resp_buf_next(work); 8165 if (!has_file_id(req->VolatileFileId)) { 8166 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 8167 work->compound_fid); 8168 id = work->compound_fid; 8169 } 8170 } else { 8171 req = smb_get_msg(work->request_buf); 8172 rsp = smb_get_msg(work->response_buf); 8173 } 8174 8175 if (!has_file_id(id)) 8176 id = req->VolatileFileId; 8177 8178 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 8179 ret = -EOPNOTSUPP; 8180 goto out; 8181 } 8182 8183 buffer = (char *)req + le32_to_cpu(req->InputOffset); 8184 8185 cnt_code = le32_to_cpu(req->CtlCode); 8186 ret = smb2_calc_max_out_buf_len(work, 48, 8187 le32_to_cpu(req->MaxOutputResponse)); 8188 if (ret < 0) { 8189 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8190 goto out; 8191 } 8192 out_buf_len = (unsigned int)ret; 8193 in_buf_len = le32_to_cpu(req->InputCount); 8194 8195 switch (cnt_code) { 8196 case FSCTL_DFS_GET_REFERRALS: 8197 case FSCTL_DFS_GET_REFERRALS_EX: 8198 /* Not support DFS yet */ 8199 ret = -EOPNOTSUPP; 8200 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 8201 goto out2; 8202 case FSCTL_CREATE_OR_GET_OBJECT_ID: 8203 { 8204 struct file_object_buf_type1_ioctl_rsp *obj_buf; 8205 8206 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 8207 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 8208 &rsp->Buffer[0]; 8209 8210 /* 8211 * TODO: This is dummy implementation to pass smbtorture 8212 * Need to check correct response later 8213 */ 8214 memset(obj_buf->ObjectId, 0x0, 16); 8215 memset(obj_buf->BirthVolumeId, 0x0, 16); 8216 memset(obj_buf->BirthObjectId, 0x0, 16); 8217 memset(obj_buf->DomainId, 0x0, 16); 8218 8219 break; 8220 } 8221 case FSCTL_PIPE_TRANSCEIVE: 8222 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 8223 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 8224 break; 8225 case FSCTL_VALIDATE_NEGOTIATE_INFO: 8226 if (conn->dialect < SMB30_PROT_ID) { 8227 ret = -EOPNOTSUPP; 8228 goto out; 8229 } 8230 8231 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 8232 Dialects)) { 8233 ret = -EINVAL; 8234 goto out; 8235 } 8236 8237 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 8238 ret = -EINVAL; 8239 goto out; 8240 } 8241 8242 ret = fsctl_validate_negotiate_info(conn, 8243 (struct validate_negotiate_info_req *)buffer, 8244 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 8245 in_buf_len); 8246 if (ret < 0) 8247 goto out; 8248 8249 nbytes = sizeof(struct validate_negotiate_info_rsp); 8250 rsp->PersistentFileId = SMB2_NO_FID; 8251 rsp->VolatileFileId = SMB2_NO_FID; 8252 break; 8253 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 8254 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 8255 if (ret < 0) 8256 goto out; 8257 nbytes = ret; 8258 break; 8259 case FSCTL_REQUEST_RESUME_KEY: 8260 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 8261 ret = -EINVAL; 8262 goto out; 8263 } 8264 8265 ret = fsctl_request_resume_key(work, req, 8266 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 8267 if (ret < 0) 8268 goto out; 8269 rsp->PersistentFileId = req->PersistentFileId; 8270 rsp->VolatileFileId = req->VolatileFileId; 8271 nbytes = sizeof(struct resume_key_ioctl_rsp); 8272 break; 8273 case FSCTL_COPYCHUNK: 8274 case FSCTL_COPYCHUNK_WRITE: 8275 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8276 ksmbd_debug(SMB, 8277 "User does not have write permission\n"); 8278 ret = -EACCES; 8279 goto out; 8280 } 8281 8282 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) { 8283 ret = -EINVAL; 8284 goto out; 8285 } 8286 8287 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 8288 ret = -EINVAL; 8289 goto out; 8290 } 8291 8292 nbytes = sizeof(struct copychunk_ioctl_rsp); 8293 rsp->VolatileFileId = req->VolatileFileId; 8294 rsp->PersistentFileId = req->PersistentFileId; 8295 fsctl_copychunk(work, 8296 (struct copychunk_ioctl_req *)buffer, 8297 le32_to_cpu(req->CtlCode), 8298 le32_to_cpu(req->InputCount), 8299 req->VolatileFileId, 8300 req->PersistentFileId, 8301 rsp); 8302 break; 8303 case FSCTL_SET_SPARSE: 8304 if (in_buf_len < sizeof(struct file_sparse)) { 8305 ret = -EINVAL; 8306 goto out; 8307 } 8308 8309 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); 8310 if (ret < 0) 8311 goto out; 8312 break; 8313 case FSCTL_SET_ZERO_DATA: 8314 { 8315 struct file_zero_data_information *zero_data; 8316 struct ksmbd_file *fp; 8317 loff_t off, len, bfz; 8318 8319 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8320 ksmbd_debug(SMB, 8321 "User does not have write permission\n"); 8322 ret = -EACCES; 8323 goto out; 8324 } 8325 8326 if (in_buf_len < sizeof(struct file_zero_data_information)) { 8327 ret = -EINVAL; 8328 goto out; 8329 } 8330 8331 zero_data = 8332 (struct file_zero_data_information *)buffer; 8333 8334 off = le64_to_cpu(zero_data->FileOffset); 8335 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 8336 if (off < 0 || bfz < 0 || off > bfz) { 8337 ret = -EINVAL; 8338 goto out; 8339 } 8340 8341 len = bfz - off; 8342 if (len) { 8343 fp = ksmbd_lookup_fd_fast(work, id); 8344 if (!fp) { 8345 ret = -ENOENT; 8346 goto out; 8347 } 8348 8349 ret = ksmbd_vfs_zero_data(work, fp, off, len); 8350 ksmbd_fd_put(work, fp); 8351 if (ret < 0) 8352 goto out; 8353 } 8354 break; 8355 } 8356 case FSCTL_QUERY_ALLOCATED_RANGES: 8357 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 8358 ret = -EINVAL; 8359 goto out; 8360 } 8361 8362 ret = fsctl_query_allocated_ranges(work, id, 8363 (struct file_allocated_range_buffer *)buffer, 8364 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 8365 out_buf_len / 8366 sizeof(struct file_allocated_range_buffer), &nbytes); 8367 if (ret == -E2BIG) { 8368 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8369 } else if (ret < 0) { 8370 nbytes = 0; 8371 goto out; 8372 } 8373 8374 nbytes *= sizeof(struct file_allocated_range_buffer); 8375 break; 8376 case FSCTL_GET_REPARSE_POINT: 8377 { 8378 struct reparse_data_buffer *reparse_ptr; 8379 struct ksmbd_file *fp; 8380 8381 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 8382 fp = ksmbd_lookup_fd_fast(work, id); 8383 if (!fp) { 8384 pr_err("not found fp!!\n"); 8385 ret = -ENOENT; 8386 goto out; 8387 } 8388 8389 reparse_ptr->ReparseTag = 8390 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 8391 reparse_ptr->ReparseDataLength = 0; 8392 ksmbd_fd_put(work, fp); 8393 nbytes = sizeof(struct reparse_data_buffer); 8394 break; 8395 } 8396 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 8397 { 8398 struct ksmbd_file *fp_in, *fp_out = NULL; 8399 struct duplicate_extents_to_file *dup_ext; 8400 loff_t src_off, dst_off, length, cloned; 8401 8402 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 8403 ret = -EINVAL; 8404 goto out; 8405 } 8406 8407 dup_ext = (struct duplicate_extents_to_file *)buffer; 8408 8409 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 8410 dup_ext->PersistentFileHandle); 8411 if (!fp_in) { 8412 pr_err("not found file handle in duplicate extent to file\n"); 8413 ret = -ENOENT; 8414 goto out; 8415 } 8416 8417 fp_out = ksmbd_lookup_fd_fast(work, id); 8418 if (!fp_out) { 8419 pr_err("not found fp\n"); 8420 ret = -ENOENT; 8421 goto dup_ext_out; 8422 } 8423 8424 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 8425 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 8426 length = le64_to_cpu(dup_ext->ByteCount); 8427 /* 8428 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 8429 * should fall back to vfs_copy_file_range(). This could be 8430 * beneficial when re-exporting nfs/smb mount, but note that 8431 * this can result in partial copy that returns an error status. 8432 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 8433 * fall back to vfs_copy_file_range(), should be avoided when 8434 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 8435 */ 8436 cloned = vfs_clone_file_range(fp_in->filp, src_off, 8437 fp_out->filp, dst_off, length, 0); 8438 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 8439 ret = -EOPNOTSUPP; 8440 goto dup_ext_out; 8441 } else if (cloned != length) { 8442 cloned = vfs_copy_file_range(fp_in->filp, src_off, 8443 fp_out->filp, dst_off, 8444 length, 0); 8445 if (cloned != length) { 8446 if (cloned < 0) 8447 ret = cloned; 8448 else 8449 ret = -EINVAL; 8450 } 8451 } 8452 8453 dup_ext_out: 8454 ksmbd_fd_put(work, fp_in); 8455 ksmbd_fd_put(work, fp_out); 8456 if (ret < 0) 8457 goto out; 8458 break; 8459 } 8460 default: 8461 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 8462 cnt_code); 8463 ret = -EOPNOTSUPP; 8464 goto out; 8465 } 8466 8467 rsp->CtlCode = cpu_to_le32(cnt_code); 8468 rsp->InputCount = cpu_to_le32(0); 8469 rsp->InputOffset = cpu_to_le32(112); 8470 rsp->OutputOffset = cpu_to_le32(112); 8471 rsp->OutputCount = cpu_to_le32(nbytes); 8472 rsp->StructureSize = cpu_to_le16(49); 8473 rsp->Reserved = cpu_to_le16(0); 8474 rsp->Flags = cpu_to_le32(0); 8475 rsp->Reserved2 = cpu_to_le32(0); 8476 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 8477 if (!ret) 8478 return ret; 8479 8480 out: 8481 if (ret == -EACCES) 8482 rsp->hdr.Status = STATUS_ACCESS_DENIED; 8483 else if (ret == -ENOENT) 8484 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 8485 else if (ret == -EOPNOTSUPP) 8486 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8487 else if (ret == -ENOSPC) 8488 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 8489 else if (ret < 0 || rsp->hdr.Status == 0) 8490 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8491 8492 out2: 8493 smb2_set_err_rsp(work); 8494 return ret; 8495 } 8496 8497 /** 8498 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 8499 * @work: smb work containing oplock break command buffer 8500 * 8501 * Return: 0 8502 */ 8503 static void smb20_oplock_break_ack(struct ksmbd_work *work) 8504 { 8505 struct smb2_oplock_break *req; 8506 struct smb2_oplock_break *rsp; 8507 struct ksmbd_file *fp; 8508 struct oplock_info *opinfo = NULL; 8509 __le32 err = 0; 8510 int ret = 0; 8511 u64 volatile_id, persistent_id; 8512 char req_oplevel = 0, rsp_oplevel = 0; 8513 unsigned int oplock_change_type; 8514 8515 WORK_BUFFERS(work, req, rsp); 8516 8517 volatile_id = req->VolatileFid; 8518 persistent_id = req->PersistentFid; 8519 req_oplevel = req->OplockLevel; 8520 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8521 volatile_id, persistent_id, req_oplevel); 8522 8523 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8524 if (!fp) { 8525 rsp->hdr.Status = STATUS_FILE_CLOSED; 8526 smb2_set_err_rsp(work); 8527 return; 8528 } 8529 8530 opinfo = opinfo_get(fp); 8531 if (!opinfo) { 8532 pr_err("unexpected null oplock_info\n"); 8533 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8534 smb2_set_err_rsp(work); 8535 ksmbd_fd_put(work, fp); 8536 return; 8537 } 8538 8539 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8540 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8541 goto err_out; 8542 } 8543 8544 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8545 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8546 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8547 goto err_out; 8548 } 8549 8550 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8551 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8552 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8553 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8554 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8555 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8556 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8557 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8558 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8559 oplock_change_type = OPLOCK_READ_TO_NONE; 8560 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8561 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8562 err = STATUS_INVALID_DEVICE_STATE; 8563 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8564 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8565 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8566 oplock_change_type = OPLOCK_WRITE_TO_READ; 8567 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8568 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8569 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8570 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8571 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8572 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8573 oplock_change_type = OPLOCK_READ_TO_NONE; 8574 } else { 8575 oplock_change_type = 0; 8576 } 8577 } else { 8578 oplock_change_type = 0; 8579 } 8580 8581 switch (oplock_change_type) { 8582 case OPLOCK_WRITE_TO_READ: 8583 ret = opinfo_write_to_read(opinfo); 8584 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8585 break; 8586 case OPLOCK_WRITE_TO_NONE: 8587 ret = opinfo_write_to_none(opinfo); 8588 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8589 break; 8590 case OPLOCK_READ_TO_NONE: 8591 ret = opinfo_read_to_none(opinfo); 8592 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8593 break; 8594 default: 8595 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8596 opinfo->level, rsp_oplevel); 8597 } 8598 8599 if (ret < 0) { 8600 rsp->hdr.Status = err; 8601 goto err_out; 8602 } 8603 8604 rsp->StructureSize = cpu_to_le16(24); 8605 rsp->OplockLevel = rsp_oplevel; 8606 rsp->Reserved = 0; 8607 rsp->Reserved2 = 0; 8608 rsp->VolatileFid = volatile_id; 8609 rsp->PersistentFid = persistent_id; 8610 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8611 if (ret) { 8612 err_out: 8613 smb2_set_err_rsp(work); 8614 } 8615 8616 opinfo->op_state = OPLOCK_STATE_NONE; 8617 wake_up_interruptible_all(&opinfo->oplock_q); 8618 opinfo_put(opinfo); 8619 ksmbd_fd_put(work, fp); 8620 } 8621 8622 static int check_lease_state(struct lease *lease, __le32 req_state) 8623 { 8624 if ((lease->new_state == 8625 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8626 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8627 lease->new_state = req_state; 8628 return 0; 8629 } 8630 8631 if (lease->new_state == req_state) 8632 return 0; 8633 8634 return 1; 8635 } 8636 8637 /** 8638 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8639 * @work: smb work containing lease break command buffer 8640 * 8641 * Return: 0 8642 */ 8643 static void smb21_lease_break_ack(struct ksmbd_work *work) 8644 { 8645 struct ksmbd_conn *conn = work->conn; 8646 struct smb2_lease_ack *req; 8647 struct smb2_lease_ack *rsp; 8648 struct oplock_info *opinfo; 8649 __le32 err = 0; 8650 int ret = 0; 8651 unsigned int lease_change_type; 8652 __le32 lease_state; 8653 struct lease *lease; 8654 8655 WORK_BUFFERS(work, req, rsp); 8656 8657 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8658 le32_to_cpu(req->LeaseState)); 8659 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8660 if (!opinfo) { 8661 ksmbd_debug(OPLOCK, "file not opened\n"); 8662 smb2_set_err_rsp(work); 8663 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8664 return; 8665 } 8666 lease = opinfo->o_lease; 8667 8668 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8669 pr_err("unexpected lease break state 0x%x\n", 8670 opinfo->op_state); 8671 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8672 goto err_out; 8673 } 8674 8675 if (check_lease_state(lease, req->LeaseState)) { 8676 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8677 ksmbd_debug(OPLOCK, 8678 "req lease state: 0x%x, expected state: 0x%x\n", 8679 req->LeaseState, lease->new_state); 8680 goto err_out; 8681 } 8682 8683 if (!atomic_read(&opinfo->breaking_cnt)) { 8684 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8685 goto err_out; 8686 } 8687 8688 /* check for bad lease state */ 8689 if (req->LeaseState & 8690 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8691 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8692 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8693 lease_change_type = OPLOCK_WRITE_TO_NONE; 8694 else 8695 lease_change_type = OPLOCK_READ_TO_NONE; 8696 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8697 le32_to_cpu(lease->state), 8698 le32_to_cpu(req->LeaseState)); 8699 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8700 req->LeaseState != SMB2_LEASE_NONE_LE) { 8701 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8702 lease_change_type = OPLOCK_READ_TO_NONE; 8703 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8704 le32_to_cpu(lease->state), 8705 le32_to_cpu(req->LeaseState)); 8706 } else { 8707 /* valid lease state changes */ 8708 err = STATUS_INVALID_DEVICE_STATE; 8709 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8710 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8711 lease_change_type = OPLOCK_WRITE_TO_NONE; 8712 else 8713 lease_change_type = OPLOCK_READ_TO_NONE; 8714 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8715 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8716 lease_change_type = OPLOCK_WRITE_TO_READ; 8717 else 8718 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8719 } else { 8720 lease_change_type = 0; 8721 } 8722 } 8723 8724 switch (lease_change_type) { 8725 case OPLOCK_WRITE_TO_READ: 8726 ret = opinfo_write_to_read(opinfo); 8727 break; 8728 case OPLOCK_READ_HANDLE_TO_READ: 8729 ret = opinfo_read_handle_to_read(opinfo); 8730 break; 8731 case OPLOCK_WRITE_TO_NONE: 8732 ret = opinfo_write_to_none(opinfo); 8733 break; 8734 case OPLOCK_READ_TO_NONE: 8735 ret = opinfo_read_to_none(opinfo); 8736 break; 8737 default: 8738 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8739 le32_to_cpu(lease->state), 8740 le32_to_cpu(req->LeaseState)); 8741 } 8742 8743 if (ret < 0) { 8744 rsp->hdr.Status = err; 8745 goto err_out; 8746 } 8747 8748 lease_state = lease->state; 8749 8750 rsp->StructureSize = cpu_to_le16(36); 8751 rsp->Reserved = 0; 8752 rsp->Flags = 0; 8753 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8754 rsp->LeaseState = lease_state; 8755 rsp->LeaseDuration = 0; 8756 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8757 if (ret) { 8758 err_out: 8759 smb2_set_err_rsp(work); 8760 } 8761 8762 opinfo->op_state = OPLOCK_STATE_NONE; 8763 wake_up_interruptible_all(&opinfo->oplock_q); 8764 atomic_dec(&opinfo->breaking_cnt); 8765 wake_up_interruptible_all(&opinfo->oplock_brk); 8766 opinfo_put(opinfo); 8767 } 8768 8769 /** 8770 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8771 * @work: smb work containing oplock/lease break command buffer 8772 * 8773 * Return: 0 on success, otherwise error 8774 */ 8775 int smb2_oplock_break(struct ksmbd_work *work) 8776 { 8777 struct smb2_oplock_break *req; 8778 struct smb2_oplock_break *rsp; 8779 8780 ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n"); 8781 8782 WORK_BUFFERS(work, req, rsp); 8783 8784 switch (le16_to_cpu(req->StructureSize)) { 8785 case OP_BREAK_STRUCT_SIZE_20: 8786 smb20_oplock_break_ack(work); 8787 break; 8788 case OP_BREAK_STRUCT_SIZE_21: 8789 smb21_lease_break_ack(work); 8790 break; 8791 default: 8792 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8793 le16_to_cpu(req->StructureSize)); 8794 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8795 smb2_set_err_rsp(work); 8796 return -EINVAL; 8797 } 8798 8799 return 0; 8800 } 8801 8802 /** 8803 * smb2_notify() - handler for smb2 notify request 8804 * @work: smb work containing notify command buffer 8805 * 8806 * Return: 0 on success, otherwise error 8807 */ 8808 int smb2_notify(struct ksmbd_work *work) 8809 { 8810 struct smb2_change_notify_req *req; 8811 struct smb2_change_notify_rsp *rsp; 8812 8813 ksmbd_debug(SMB, "Received smb2 notify\n"); 8814 8815 WORK_BUFFERS(work, req, rsp); 8816 8817 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8818 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8819 smb2_set_err_rsp(work); 8820 return -EIO; 8821 } 8822 8823 smb2_set_err_rsp(work); 8824 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8825 return -EOPNOTSUPP; 8826 } 8827 8828 /** 8829 * smb2_is_sign_req() - handler for checking packet signing status 8830 * @work: smb work containing notify command buffer 8831 * @command: SMB2 command id 8832 * 8833 * Return: true if packed is signed, false otherwise 8834 */ 8835 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8836 { 8837 struct smb2_hdr *rcv_hdr2 = smb_get_msg(work->request_buf); 8838 8839 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8840 command != SMB2_NEGOTIATE_HE && 8841 command != SMB2_SESSION_SETUP_HE && 8842 command != SMB2_OPLOCK_BREAK_HE) 8843 return true; 8844 8845 return false; 8846 } 8847 8848 /** 8849 * smb2_check_sign_req() - handler for req packet sign processing 8850 * @work: smb work containing notify command buffer 8851 * 8852 * Return: 1 on success, 0 otherwise 8853 */ 8854 int smb2_check_sign_req(struct ksmbd_work *work) 8855 { 8856 struct smb2_hdr *hdr; 8857 char signature_req[SMB2_SIGNATURE_SIZE]; 8858 char signature[SMB2_HMACSHA256_SIZE]; 8859 struct kvec iov[1]; 8860 size_t len; 8861 8862 hdr = smb_get_msg(work->request_buf); 8863 if (work->next_smb2_rcv_hdr_off) 8864 hdr = ksmbd_req_buf_next(work); 8865 8866 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8867 len = get_rfc1002_len(work->request_buf); 8868 else if (hdr->NextCommand) 8869 len = le32_to_cpu(hdr->NextCommand); 8870 else 8871 len = get_rfc1002_len(work->request_buf) - 8872 work->next_smb2_rcv_hdr_off; 8873 8874 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8875 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8876 8877 iov[0].iov_base = (char *)&hdr->ProtocolId; 8878 iov[0].iov_len = len; 8879 8880 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8881 signature); 8882 8883 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8884 pr_err("bad smb2 signature\n"); 8885 return 0; 8886 } 8887 8888 return 1; 8889 } 8890 8891 /** 8892 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8893 * @work: smb work containing notify command buffer 8894 * 8895 */ 8896 void smb2_set_sign_rsp(struct ksmbd_work *work) 8897 { 8898 struct smb2_hdr *hdr; 8899 char signature[SMB2_HMACSHA256_SIZE]; 8900 struct kvec *iov; 8901 int n_vec = 1; 8902 8903 hdr = ksmbd_resp_buf_curr(work); 8904 hdr->Flags |= SMB2_FLAGS_SIGNED; 8905 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8906 8907 if (hdr->Command == SMB2_READ) { 8908 iov = &work->iov[work->iov_idx - 1]; 8909 n_vec++; 8910 } else { 8911 iov = &work->iov[work->iov_idx]; 8912 } 8913 8914 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8915 signature); 8916 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8917 } 8918 8919 /** 8920 * smb3_check_sign_req() - handler for req packet sign processing 8921 * @work: smb work containing notify command buffer 8922 * 8923 * Return: 1 on success, 0 otherwise 8924 */ 8925 int smb3_check_sign_req(struct ksmbd_work *work) 8926 { 8927 struct ksmbd_conn *conn = work->conn; 8928 char *signing_key; 8929 struct smb2_hdr *hdr; 8930 struct channel *chann; 8931 char signature_req[SMB2_SIGNATURE_SIZE]; 8932 char signature[SMB2_CMACAES_SIZE]; 8933 struct kvec iov[1]; 8934 size_t len; 8935 8936 hdr = smb_get_msg(work->request_buf); 8937 if (work->next_smb2_rcv_hdr_off) 8938 hdr = ksmbd_req_buf_next(work); 8939 8940 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8941 len = get_rfc1002_len(work->request_buf); 8942 else if (hdr->NextCommand) 8943 len = le32_to_cpu(hdr->NextCommand); 8944 else 8945 len = get_rfc1002_len(work->request_buf) - 8946 work->next_smb2_rcv_hdr_off; 8947 8948 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8949 signing_key = work->sess->smb3signingkey; 8950 } else { 8951 chann = lookup_chann_list(work->sess, conn); 8952 if (!chann) { 8953 return 0; 8954 } 8955 signing_key = chann->smb3signingkey; 8956 } 8957 8958 if (!signing_key) { 8959 pr_err("SMB3 signing key is not generated\n"); 8960 return 0; 8961 } 8962 8963 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8964 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8965 iov[0].iov_base = (char *)&hdr->ProtocolId; 8966 iov[0].iov_len = len; 8967 8968 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8969 return 0; 8970 8971 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8972 pr_err("bad smb2 signature\n"); 8973 return 0; 8974 } 8975 8976 return 1; 8977 } 8978 8979 /** 8980 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8981 * @work: smb work containing notify command buffer 8982 * 8983 */ 8984 void smb3_set_sign_rsp(struct ksmbd_work *work) 8985 { 8986 struct ksmbd_conn *conn = work->conn; 8987 struct smb2_hdr *hdr; 8988 struct channel *chann; 8989 char signature[SMB2_CMACAES_SIZE]; 8990 struct kvec *iov; 8991 int n_vec = 1; 8992 char *signing_key; 8993 8994 hdr = ksmbd_resp_buf_curr(work); 8995 8996 if (conn->binding == false && 8997 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8998 signing_key = work->sess->smb3signingkey; 8999 } else { 9000 chann = lookup_chann_list(work->sess, work->conn); 9001 if (!chann) { 9002 return; 9003 } 9004 signing_key = chann->smb3signingkey; 9005 } 9006 9007 if (!signing_key) 9008 return; 9009 9010 hdr->Flags |= SMB2_FLAGS_SIGNED; 9011 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9012 9013 if (hdr->Command == SMB2_READ) { 9014 iov = &work->iov[work->iov_idx - 1]; 9015 n_vec++; 9016 } else { 9017 iov = &work->iov[work->iov_idx]; 9018 } 9019 9020 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 9021 signature)) 9022 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9023 } 9024 9025 /** 9026 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 9027 * @work: smb work containing response buffer 9028 * 9029 */ 9030 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 9031 { 9032 struct ksmbd_conn *conn = work->conn; 9033 struct ksmbd_session *sess = work->sess; 9034 struct smb2_hdr *req, *rsp; 9035 9036 if (conn->dialect != SMB311_PROT_ID) 9037 return; 9038 9039 WORK_BUFFERS(work, req, rsp); 9040 9041 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 9042 conn->preauth_info) 9043 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9044 conn->preauth_info->Preauth_HashValue); 9045 9046 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 9047 __u8 *hash_value; 9048 9049 if (conn->binding) { 9050 struct preauth_session *preauth_sess; 9051 9052 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 9053 if (!preauth_sess) 9054 return; 9055 hash_value = preauth_sess->Preauth_HashValue; 9056 } else { 9057 hash_value = sess->Preauth_HashValue; 9058 if (!hash_value) 9059 return; 9060 } 9061 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9062 hash_value); 9063 } 9064 } 9065 9066 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 9067 { 9068 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 9069 struct smb2_hdr *hdr = smb_get_msg(old_buf); 9070 unsigned int orig_len = get_rfc1002_len(old_buf); 9071 9072 /* tr_buf must be cleared by the caller */ 9073 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 9074 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 9075 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 9076 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 9077 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 9078 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 9079 else 9080 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 9081 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 9082 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 9083 inc_rfc1001_len(tr_buf, orig_len); 9084 } 9085 9086 int smb3_encrypt_resp(struct ksmbd_work *work) 9087 { 9088 struct kvec *iov = work->iov; 9089 int rc = -ENOMEM; 9090 void *tr_buf; 9091 9092 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP); 9093 if (!tr_buf) 9094 return rc; 9095 9096 /* fill transform header */ 9097 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 9098 9099 iov[0].iov_base = tr_buf; 9100 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9101 work->tr_buf = tr_buf; 9102 9103 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 9104 } 9105 9106 bool smb3_is_transform_hdr(void *buf) 9107 { 9108 struct smb2_transform_hdr *trhdr = smb_get_msg(buf); 9109 9110 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 9111 } 9112 9113 int smb3_decrypt_req(struct ksmbd_work *work) 9114 { 9115 struct ksmbd_session *sess; 9116 char *buf = work->request_buf; 9117 unsigned int pdu_length = get_rfc1002_len(buf); 9118 struct kvec iov[2]; 9119 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 9120 struct smb2_transform_hdr *tr_hdr = smb_get_msg(buf); 9121 int rc = 0; 9122 9123 if (pdu_length < sizeof(struct smb2_transform_hdr) || 9124 buf_data_size < sizeof(struct smb2_hdr)) { 9125 pr_err("Transform message is too small (%u)\n", 9126 pdu_length); 9127 return -ECONNABORTED; 9128 } 9129 9130 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 9131 pr_err("Transform message is broken\n"); 9132 return -ECONNABORTED; 9133 } 9134 9135 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 9136 if (!sess) { 9137 pr_err("invalid session id(%llx) in transform header\n", 9138 le64_to_cpu(tr_hdr->SessionId)); 9139 return -ECONNABORTED; 9140 } 9141 ksmbd_user_session_put(sess); 9142 9143 iov[0].iov_base = buf; 9144 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9145 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 9146 iov[1].iov_len = buf_data_size; 9147 rc = ksmbd_crypt_message(work, iov, 2, 0); 9148 if (rc) 9149 return rc; 9150 9151 memmove(buf + 4, iov[1].iov_base, buf_data_size); 9152 *(__be32 *)buf = cpu_to_be32(buf_data_size); 9153 9154 return rc; 9155 } 9156 9157 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 9158 { 9159 struct ksmbd_conn *conn = work->conn; 9160 struct ksmbd_session *sess = work->sess; 9161 struct smb2_hdr *rsp = smb_get_msg(work->response_buf); 9162 9163 if (conn->dialect < SMB30_PROT_ID) 9164 return false; 9165 9166 if (work->next_smb2_rcv_hdr_off) 9167 rsp = ksmbd_resp_buf_next(work); 9168 9169 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 9170 sess->user && !user_guest(sess->user) && 9171 rsp->Status == STATUS_SUCCESS) 9172 return true; 9173 return false; 9174 } 9175