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 <crypto/utils.h> 8 #include <linux/inetdevice.h> 9 #include <net/addrconf.h> 10 #include <linux/syscalls.h> 11 #include <linux/namei.h> 12 #include <linux/statfs.h> 13 #include <linux/ethtool.h> 14 #include <linux/falloc.h> 15 #include <linux/mount.h> 16 #include <linux/filelock.h> 17 18 #include "glob.h" 19 #include "smbfsctl.h" 20 #include "oplock.h" 21 #include "smbacl.h" 22 23 #include "auth.h" 24 #include "asn1.h" 25 #include "connection.h" 26 #include "transport_ipc.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 (work->tcon->t_state != TREE_CONNECTED) 129 return -ENOENT; 130 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 131 pr_err("tree id(%u) is different with id(%u) in first operation\n", 132 tree_id, work->tcon->id); 133 return -EINVAL; 134 } 135 return 1; 136 } 137 138 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 139 if (!work->tcon) { 140 pr_err("Invalid tid %d\n", tree_id); 141 return -ENOENT; 142 } 143 144 return 1; 145 } 146 147 /** 148 * smb2_set_err_rsp() - set error response code on smb response 149 * @work: smb work containing response buffer 150 */ 151 void smb2_set_err_rsp(struct ksmbd_work *work) 152 { 153 struct smb2_err_rsp *err_rsp; 154 155 if (work->next_smb2_rcv_hdr_off) 156 err_rsp = ksmbd_resp_buf_next(work); 157 else 158 err_rsp = smb_get_msg(work->response_buf); 159 160 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 161 int err; 162 163 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 164 err_rsp->ErrorContextCount = 0; 165 err_rsp->Reserved = 0; 166 err_rsp->ByteCount = 0; 167 err_rsp->ErrorData[0] = 0; 168 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, 169 __SMB2_HEADER_STRUCTURE_SIZE + 170 SMB2_ERROR_STRUCTURE_SIZE2); 171 if (err) 172 work->send_no_response = 1; 173 } 174 } 175 176 /** 177 * is_smb2_neg_cmd() - is it smb2 negotiation command 178 * @work: smb work containing smb header 179 * 180 * Return: true if smb2 negotiation command, otherwise false 181 */ 182 bool is_smb2_neg_cmd(struct ksmbd_work *work) 183 { 184 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 185 186 /* is it SMB2 header ? */ 187 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 188 return false; 189 190 /* make sure it is request not response message */ 191 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 192 return false; 193 194 if (hdr->Command != SMB2_NEGOTIATE) 195 return false; 196 197 return true; 198 } 199 200 /** 201 * is_smb2_rsp() - is it smb2 response 202 * @work: smb work containing smb response buffer 203 * 204 * Return: true if smb2 response, otherwise false 205 */ 206 bool is_smb2_rsp(struct ksmbd_work *work) 207 { 208 struct smb2_hdr *hdr = smb_get_msg(work->response_buf); 209 210 /* is it SMB2 header ? */ 211 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 212 return false; 213 214 /* make sure it is response not request message */ 215 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 216 return false; 217 218 return true; 219 } 220 221 /** 222 * get_smb2_cmd_val() - get smb command code from smb header 223 * @work: smb work containing smb request buffer 224 * 225 * Return: smb2 request command value 226 */ 227 u16 get_smb2_cmd_val(struct ksmbd_work *work) 228 { 229 struct smb2_hdr *rcv_hdr; 230 231 if (work->next_smb2_rcv_hdr_off) 232 rcv_hdr = ksmbd_req_buf_next(work); 233 else 234 rcv_hdr = smb_get_msg(work->request_buf); 235 return le16_to_cpu(rcv_hdr->Command); 236 } 237 238 /** 239 * set_smb2_rsp_status() - set error response code on smb2 header 240 * @work: smb work containing response buffer 241 * @err: error response code 242 */ 243 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 244 { 245 struct smb2_hdr *rsp_hdr; 246 247 rsp_hdr = smb_get_msg(work->response_buf); 248 rsp_hdr->Status = err; 249 250 work->iov_idx = 0; 251 work->iov_cnt = 0; 252 work->next_smb2_rcv_hdr_off = 0; 253 smb2_set_err_rsp(work); 254 } 255 256 /** 257 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 258 * @work: smb work containing smb request buffer 259 * 260 * smb2 negotiate response is sent in reply of smb1 negotiate command for 261 * dialect auto-negotiation. 262 */ 263 int init_smb2_neg_rsp(struct ksmbd_work *work) 264 { 265 struct smb2_hdr *rsp_hdr; 266 struct smb2_negotiate_rsp *rsp; 267 struct ksmbd_conn *conn = work->conn; 268 int err; 269 270 rsp_hdr = smb_get_msg(work->response_buf); 271 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 272 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 273 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 274 rsp_hdr->CreditRequest = cpu_to_le16(2); 275 rsp_hdr->Command = SMB2_NEGOTIATE; 276 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 277 rsp_hdr->NextCommand = 0; 278 rsp_hdr->MessageId = 0; 279 rsp_hdr->Id.SyncId.ProcessId = 0; 280 rsp_hdr->Id.SyncId.TreeId = 0; 281 rsp_hdr->SessionId = 0; 282 memset(rsp_hdr->Signature, 0, 16); 283 284 rsp = smb_get_msg(work->response_buf); 285 286 WARN_ON(ksmbd_conn_good(conn)); 287 288 rsp->StructureSize = cpu_to_le16(65); 289 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 290 rsp->DialectRevision = cpu_to_le16(conn->dialect); 291 /* Not setting conn guid rsp->ServerGUID, as it 292 * not used by client for identifying connection 293 */ 294 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 295 /* Default Max Message Size till SMB2.0, 64K*/ 296 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 297 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 298 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 299 300 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 301 rsp->ServerStartTime = 0; 302 303 rsp->SecurityBufferOffset = cpu_to_le16(128); 304 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 305 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 306 le16_to_cpu(rsp->SecurityBufferOffset)); 307 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 308 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 309 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 310 err = ksmbd_iov_pin_rsp(work, rsp, 311 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); 312 if (err) 313 return err; 314 conn->use_spnego = true; 315 316 ksmbd_conn_set_need_negotiate(conn); 317 return 0; 318 } 319 320 /** 321 * smb2_set_rsp_credits() - set number of credits in response buffer 322 * @work: smb work containing smb response buffer 323 */ 324 int smb2_set_rsp_credits(struct ksmbd_work *work) 325 { 326 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 327 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 328 struct ksmbd_conn *conn = work->conn; 329 unsigned short credits_requested, aux_max; 330 unsigned short credit_charge, credits_granted = 0; 331 332 if (work->send_no_response) 333 return 0; 334 335 hdr->CreditCharge = req_hdr->CreditCharge; 336 337 if (conn->total_credits > conn->vals->max_credits) { 338 hdr->CreditRequest = 0; 339 pr_err("Total credits overflow: %d\n", conn->total_credits); 340 return -EINVAL; 341 } 342 343 credit_charge = max_t(unsigned short, 344 le16_to_cpu(req_hdr->CreditCharge), 1); 345 if (credit_charge > conn->total_credits) { 346 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 347 credit_charge, conn->total_credits); 348 return -EINVAL; 349 } 350 351 conn->total_credits -= credit_charge; 352 conn->outstanding_credits -= credit_charge; 353 credits_requested = max_t(unsigned short, 354 le16_to_cpu(req_hdr->CreditRequest), 1); 355 356 /* according to smb2.credits smbtorture, Windows server 357 * 2016 or later grant up to 8192 credits at once. 358 * 359 * TODO: Need to adjuct CreditRequest value according to 360 * current cpu load 361 */ 362 if (hdr->Command == SMB2_NEGOTIATE) 363 aux_max = 1; 364 else 365 aux_max = conn->vals->max_credits - conn->total_credits; 366 credits_granted = min_t(unsigned short, credits_requested, aux_max); 367 368 conn->total_credits += credits_granted; 369 work->credits_granted += credits_granted; 370 371 if (!req_hdr->NextCommand) { 372 /* Update CreditRequest in last request */ 373 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 374 } 375 ksmbd_debug(SMB, 376 "credits: requested[%d] granted[%d] total_granted[%d]\n", 377 credits_requested, credits_granted, 378 conn->total_credits); 379 return 0; 380 } 381 382 /** 383 * init_chained_smb2_rsp() - initialize smb2 chained response 384 * @work: smb work containing smb response buffer 385 */ 386 static void init_chained_smb2_rsp(struct ksmbd_work *work) 387 { 388 struct smb2_hdr *req = ksmbd_req_buf_next(work); 389 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 390 struct smb2_hdr *rsp_hdr; 391 struct smb2_hdr *rcv_hdr; 392 int next_hdr_offset = 0; 393 int len, new_len; 394 395 /* Len of this response = updated RFC len - offset of previous cmd 396 * in the compound rsp 397 */ 398 399 /* Storing the current local FID which may be needed by subsequent 400 * command in the compound request 401 */ 402 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 403 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 404 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 405 work->compound_sid = le64_to_cpu(rsp->SessionId); 406 } 407 408 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 409 next_hdr_offset = le32_to_cpu(req->NextCommand); 410 411 new_len = ALIGN(len, 8); 412 work->iov[work->iov_idx].iov_len += (new_len - len); 413 inc_rfc1001_len(work->response_buf, new_len - len); 414 rsp->NextCommand = cpu_to_le32(new_len); 415 416 work->next_smb2_rcv_hdr_off += next_hdr_offset; 417 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 418 work->next_smb2_rsp_hdr_off += new_len; 419 ksmbd_debug(SMB, 420 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 421 new_len, work->next_smb2_rcv_hdr_off, 422 work->next_smb2_rsp_hdr_off); 423 424 rsp_hdr = ksmbd_resp_buf_next(work); 425 rcv_hdr = ksmbd_req_buf_next(work); 426 427 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 428 ksmbd_debug(SMB, "related flag should be set\n"); 429 work->compound_fid = KSMBD_NO_FID; 430 work->compound_pfid = KSMBD_NO_FID; 431 } 432 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 433 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 434 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 435 rsp_hdr->Command = rcv_hdr->Command; 436 437 /* 438 * Message is response. We don't grant oplock yet. 439 */ 440 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 441 SMB2_FLAGS_RELATED_OPERATIONS); 442 rsp_hdr->NextCommand = 0; 443 rsp_hdr->MessageId = rcv_hdr->MessageId; 444 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 445 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 446 rsp_hdr->SessionId = rcv_hdr->SessionId; 447 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 448 } 449 450 /** 451 * is_chained_smb2_message() - check for chained command 452 * @work: smb work containing smb request buffer 453 * 454 * Return: true if chained request, otherwise false 455 */ 456 bool is_chained_smb2_message(struct ksmbd_work *work) 457 { 458 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 459 unsigned int len, next_cmd; 460 461 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 462 return false; 463 464 hdr = ksmbd_req_buf_next(work); 465 next_cmd = le32_to_cpu(hdr->NextCommand); 466 if (next_cmd > 0) { 467 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 468 __SMB2_HEADER_STRUCTURE_SIZE > 469 get_rfc1002_len(work->request_buf)) { 470 pr_err("next command(%u) offset exceeds smb msg size\n", 471 next_cmd); 472 return false; 473 } 474 475 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 476 work->response_sz) { 477 pr_err("next response offset exceeds response buffer size\n"); 478 return false; 479 } 480 481 ksmbd_debug(SMB, "got SMB2 chained command\n"); 482 init_chained_smb2_rsp(work); 483 return true; 484 } else if (work->next_smb2_rcv_hdr_off) { 485 /* 486 * This is last request in chained command, 487 * align response to 8 byte 488 */ 489 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 490 len = len - get_rfc1002_len(work->response_buf); 491 if (len) { 492 ksmbd_debug(SMB, "padding len %u\n", len); 493 work->iov[work->iov_idx].iov_len += len; 494 inc_rfc1001_len(work->response_buf, len); 495 } 496 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 497 } 498 return false; 499 } 500 501 /** 502 * init_smb2_rsp_hdr() - initialize smb2 response 503 * @work: smb work containing smb request buffer 504 * 505 * Return: 0 506 */ 507 int init_smb2_rsp_hdr(struct ksmbd_work *work) 508 { 509 struct smb2_hdr *rsp_hdr = smb_get_msg(work->response_buf); 510 struct smb2_hdr *rcv_hdr = smb_get_msg(work->request_buf); 511 512 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 513 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 514 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 515 rsp_hdr->Command = rcv_hdr->Command; 516 517 /* 518 * Message is response. We don't grant oplock yet. 519 */ 520 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 521 rsp_hdr->NextCommand = 0; 522 rsp_hdr->MessageId = rcv_hdr->MessageId; 523 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 524 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 525 rsp_hdr->SessionId = rcv_hdr->SessionId; 526 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 527 528 return 0; 529 } 530 531 /** 532 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 533 * @work: smb work containing smb request buffer 534 * 535 * Return: 0 on success, otherwise error 536 */ 537 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 538 { 539 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 540 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 541 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 542 size_t sz = small_sz; 543 int cmd = le16_to_cpu(hdr->Command); 544 545 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 546 sz = large_sz; 547 548 if (cmd == SMB2_QUERY_INFO_HE) { 549 struct smb2_query_info_req *req; 550 551 if (get_rfc1002_len(work->request_buf) < 552 offsetof(struct smb2_query_info_req, OutputBufferLength)) 553 return -EINVAL; 554 555 req = smb_get_msg(work->request_buf); 556 if ((req->InfoType == SMB2_O_INFO_FILE && 557 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 558 req->FileInfoClass == FILE_ALL_INFORMATION)) || 559 req->InfoType == SMB2_O_INFO_SECURITY) 560 sz = large_sz; 561 } 562 563 /* allocate large response buf for chained commands */ 564 if (le32_to_cpu(hdr->NextCommand) > 0) 565 sz = large_sz; 566 567 work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP); 568 if (!work->response_buf) 569 return -ENOMEM; 570 571 work->response_sz = sz; 572 return 0; 573 } 574 575 /** 576 * smb2_check_user_session() - check for valid session for a user 577 * @work: smb work containing smb request buffer 578 * 579 * Return: 0 on success, otherwise error 580 */ 581 int smb2_check_user_session(struct ksmbd_work *work) 582 { 583 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 584 struct ksmbd_conn *conn = work->conn; 585 unsigned int cmd = le16_to_cpu(req_hdr->Command); 586 unsigned long long sess_id; 587 588 /* 589 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 590 * require a session id, so no need to validate user session's for 591 * these commands. 592 */ 593 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 594 cmd == SMB2_SESSION_SETUP_HE) 595 return 0; 596 597 if (!ksmbd_conn_good(conn)) 598 return -EIO; 599 600 sess_id = le64_to_cpu(req_hdr->SessionId); 601 602 /* 603 * If request is not the first in Compound request, 604 * Just validate session id in header with work->sess->id. 605 */ 606 if (work->next_smb2_rcv_hdr_off) { 607 if (!work->sess) { 608 pr_err("The first operation in the compound does not have sess\n"); 609 return -EINVAL; 610 } 611 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 612 pr_err("session id(%llu) is different with the first operation(%lld)\n", 613 sess_id, work->sess->id); 614 return -EINVAL; 615 } 616 return 1; 617 } 618 619 /* Check for validity of user session */ 620 work->sess = ksmbd_session_lookup_all(conn, sess_id); 621 if (work->sess) 622 return 1; 623 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 624 return -ENOENT; 625 } 626 627 /** 628 * smb2_get_name() - get filename string from on the wire smb format 629 * @src: source buffer 630 * @maxlen: maxlen of source string 631 * @local_nls: nls_table pointer 632 * 633 * Return: matching converted filename on success, otherwise error ptr 634 */ 635 static char * 636 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 637 { 638 char *name; 639 640 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 641 if (IS_ERR(name)) { 642 pr_err("failed to get name %ld\n", PTR_ERR(name)); 643 return name; 644 } 645 646 if (*name == '\0') { 647 kfree(name); 648 return ERR_PTR(-EINVAL); 649 } 650 651 if (*name == '\\') { 652 pr_err("not allow directory name included leading slash\n"); 653 kfree(name); 654 return ERR_PTR(-EINVAL); 655 } 656 657 ksmbd_conv_path_to_unix(name); 658 ksmbd_strip_last_slash(name); 659 return name; 660 } 661 662 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 663 { 664 struct ksmbd_conn *conn = work->conn; 665 int id; 666 667 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 668 if (id < 0) { 669 pr_err("Failed to alloc async message id\n"); 670 return id; 671 } 672 work->asynchronous = true; 673 work->async_id = id; 674 675 ksmbd_debug(SMB, 676 "Send interim Response to inform async request id : %d\n", 677 work->async_id); 678 679 work->cancel_fn = fn; 680 work->cancel_argv = arg; 681 682 if (list_empty(&work->async_request_entry)) { 683 spin_lock(&conn->request_lock); 684 list_add_tail(&work->async_request_entry, &conn->async_requests); 685 spin_unlock(&conn->request_lock); 686 } 687 688 return 0; 689 } 690 691 void release_async_work(struct ksmbd_work *work) 692 { 693 struct ksmbd_conn *conn = work->conn; 694 695 spin_lock(&conn->request_lock); 696 list_del_init(&work->async_request_entry); 697 spin_unlock(&conn->request_lock); 698 699 work->asynchronous = 0; 700 work->cancel_fn = NULL; 701 kfree(work->cancel_argv); 702 work->cancel_argv = NULL; 703 if (work->async_id) { 704 ksmbd_release_id(&conn->async_ida, work->async_id); 705 work->async_id = 0; 706 } 707 } 708 709 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 710 { 711 struct smb2_hdr *rsp_hdr; 712 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 713 714 if (!in_work) 715 return; 716 717 if (allocate_interim_rsp_buf(in_work)) { 718 pr_err("smb_allocate_rsp_buf failed!\n"); 719 ksmbd_free_work_struct(in_work); 720 return; 721 } 722 723 in_work->conn = work->conn; 724 memcpy(smb_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 725 __SMB2_HEADER_STRUCTURE_SIZE); 726 727 rsp_hdr = smb_get_msg(in_work->response_buf); 728 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 729 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); 730 smb2_set_err_rsp(in_work); 731 rsp_hdr->Status = status; 732 733 ksmbd_conn_write(in_work); 734 ksmbd_free_work_struct(in_work); 735 } 736 737 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 738 { 739 if (S_ISDIR(mode) || S_ISREG(mode)) 740 return 0; 741 742 if (S_ISLNK(mode)) 743 return IO_REPARSE_TAG_LX_SYMLINK_LE; 744 else if (S_ISFIFO(mode)) 745 return IO_REPARSE_TAG_LX_FIFO_LE; 746 else if (S_ISSOCK(mode)) 747 return IO_REPARSE_TAG_AF_UNIX_LE; 748 else if (S_ISCHR(mode)) 749 return IO_REPARSE_TAG_LX_CHR_LE; 750 else if (S_ISBLK(mode)) 751 return IO_REPARSE_TAG_LX_BLK_LE; 752 753 return 0; 754 } 755 756 /** 757 * smb2_get_dos_mode() - get file mode in dos format from unix mode 758 * @stat: kstat containing file mode 759 * @attribute: attribute flags 760 * 761 * Return: converted dos mode 762 */ 763 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 764 { 765 int attr = 0; 766 767 if (S_ISDIR(stat->mode)) { 768 attr = FILE_ATTRIBUTE_DIRECTORY | 769 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 770 } else { 771 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 772 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 773 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 774 FILE_SUPPORTS_SPARSE_FILES)) 775 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 776 777 if (smb2_get_reparse_tag_special_file(stat->mode)) 778 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 779 } 780 781 return attr; 782 } 783 784 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 785 __le16 hash_id) 786 { 787 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 788 pneg_ctxt->DataLength = cpu_to_le16(38); 789 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 790 pneg_ctxt->Reserved = cpu_to_le32(0); 791 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 792 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 793 pneg_ctxt->HashAlgorithms = hash_id; 794 } 795 796 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 797 __le16 cipher_type) 798 { 799 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 800 pneg_ctxt->DataLength = cpu_to_le16(4); 801 pneg_ctxt->Reserved = cpu_to_le32(0); 802 pneg_ctxt->CipherCount = cpu_to_le16(1); 803 pneg_ctxt->Ciphers[0] = cipher_type; 804 } 805 806 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 807 __le16 sign_algo) 808 { 809 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 810 pneg_ctxt->DataLength = 811 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 812 - sizeof(struct smb2_neg_context)); 813 pneg_ctxt->Reserved = cpu_to_le32(0); 814 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 815 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 816 } 817 818 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 819 { 820 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 821 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 822 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 823 pneg_ctxt->Name[0] = 0x93; 824 pneg_ctxt->Name[1] = 0xAD; 825 pneg_ctxt->Name[2] = 0x25; 826 pneg_ctxt->Name[3] = 0x50; 827 pneg_ctxt->Name[4] = 0x9C; 828 pneg_ctxt->Name[5] = 0xB4; 829 pneg_ctxt->Name[6] = 0x11; 830 pneg_ctxt->Name[7] = 0xE7; 831 pneg_ctxt->Name[8] = 0xB4; 832 pneg_ctxt->Name[9] = 0x23; 833 pneg_ctxt->Name[10] = 0x83; 834 pneg_ctxt->Name[11] = 0xDE; 835 pneg_ctxt->Name[12] = 0x96; 836 pneg_ctxt->Name[13] = 0x8B; 837 pneg_ctxt->Name[14] = 0xCD; 838 pneg_ctxt->Name[15] = 0x7C; 839 } 840 841 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 842 struct smb2_negotiate_rsp *rsp) 843 { 844 char * const pneg_ctxt = (char *)rsp + 845 le32_to_cpu(rsp->NegotiateContextOffset); 846 int neg_ctxt_cnt = 1; 847 int ctxt_size; 848 849 ksmbd_debug(SMB, 850 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 851 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 852 conn->preauth_info->Preauth_HashId); 853 ctxt_size = sizeof(struct smb2_preauth_neg_context); 854 855 if (conn->cipher_type) { 856 /* Round to 8 byte boundary */ 857 ctxt_size = round_up(ctxt_size, 8); 858 ksmbd_debug(SMB, 859 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 860 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 861 (pneg_ctxt + ctxt_size), 862 conn->cipher_type); 863 neg_ctxt_cnt++; 864 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 865 } 866 867 /* compression context not yet supported */ 868 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 869 870 if (conn->posix_ext_supported) { 871 ctxt_size = round_up(ctxt_size, 8); 872 ksmbd_debug(SMB, 873 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 874 build_posix_ctxt((struct smb2_posix_neg_context *) 875 (pneg_ctxt + ctxt_size)); 876 neg_ctxt_cnt++; 877 ctxt_size += sizeof(struct smb2_posix_neg_context); 878 } 879 880 if (conn->signing_negotiated) { 881 ctxt_size = round_up(ctxt_size, 8); 882 ksmbd_debug(SMB, 883 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 884 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 885 (pneg_ctxt + ctxt_size), 886 conn->signing_algorithm); 887 neg_ctxt_cnt++; 888 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 889 } 890 891 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 892 return ctxt_size + AUTH_GSS_PADDING; 893 } 894 895 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 896 struct smb2_preauth_neg_context *pneg_ctxt, 897 int ctxt_len) 898 { 899 /* 900 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 901 * which may not be present. Only check for used HashAlgorithms[1]. 902 */ 903 if (ctxt_len < 904 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 905 return STATUS_INVALID_PARAMETER; 906 907 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 908 return STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 909 910 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 911 return STATUS_SUCCESS; 912 } 913 914 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 915 struct smb2_encryption_neg_context *pneg_ctxt, 916 int ctxt_len) 917 { 918 int cph_cnt; 919 int i, cphs_size; 920 921 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 922 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 923 return; 924 } 925 926 conn->cipher_type = 0; 927 928 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 929 cphs_size = cph_cnt * sizeof(__le16); 930 931 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 932 ctxt_len) { 933 pr_err("Invalid cipher count(%d)\n", cph_cnt); 934 return; 935 } 936 937 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 938 return; 939 940 for (i = 0; i < cph_cnt; i++) { 941 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 942 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 943 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 944 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 945 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 946 pneg_ctxt->Ciphers[i]); 947 conn->cipher_type = pneg_ctxt->Ciphers[i]; 948 break; 949 } 950 } 951 } 952 953 /** 954 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 955 * @conn: smb connection 956 * 957 * Return: true if connection should be encrypted, else false 958 */ 959 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 960 { 961 if (!conn->ops->generate_encryptionkey) 962 return false; 963 964 /* 965 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 966 * SMB 3.1.1 uses the cipher_type field. 967 */ 968 return (conn->vals->req_capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 969 conn->cipher_type; 970 } 971 972 static void decode_compress_ctxt(struct ksmbd_conn *conn, 973 struct smb2_compression_capabilities_context *pneg_ctxt) 974 { 975 conn->compress_algorithm = SMB3_COMPRESS_NONE; 976 } 977 978 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 979 struct smb2_signing_capabilities *pneg_ctxt, 980 int ctxt_len) 981 { 982 int sign_algo_cnt; 983 int i, sign_alos_size; 984 985 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 986 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 987 return; 988 } 989 990 conn->signing_negotiated = false; 991 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 992 sign_alos_size = sign_algo_cnt * sizeof(__le16); 993 994 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 995 ctxt_len) { 996 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 997 return; 998 } 999 1000 for (i = 0; i < sign_algo_cnt; i++) { 1001 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 1002 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 1003 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 1004 pneg_ctxt->SigningAlgorithms[i]); 1005 conn->signing_negotiated = true; 1006 conn->signing_algorithm = 1007 pneg_ctxt->SigningAlgorithms[i]; 1008 break; 1009 } 1010 } 1011 } 1012 1013 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 1014 struct smb2_negotiate_req *req, 1015 unsigned int len_of_smb) 1016 { 1017 /* +4 is to account for the RFC1001 len field */ 1018 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1019 int i = 0, len_of_ctxts; 1020 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1021 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1022 __le32 status = STATUS_INVALID_PARAMETER; 1023 1024 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1025 if (len_of_smb <= offset) { 1026 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1027 return status; 1028 } 1029 1030 len_of_ctxts = len_of_smb - offset; 1031 1032 while (i++ < neg_ctxt_cnt) { 1033 int clen, ctxt_len; 1034 1035 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1036 break; 1037 1038 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1039 clen = le16_to_cpu(pctx->DataLength); 1040 ctxt_len = clen + sizeof(struct smb2_neg_context); 1041 1042 if (ctxt_len > len_of_ctxts) 1043 break; 1044 1045 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1046 ksmbd_debug(SMB, 1047 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1048 if (conn->preauth_info->Preauth_HashId) 1049 break; 1050 1051 status = decode_preauth_ctxt(conn, 1052 (struct smb2_preauth_neg_context *)pctx, 1053 ctxt_len); 1054 if (status != STATUS_SUCCESS) 1055 break; 1056 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1057 ksmbd_debug(SMB, 1058 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1059 if (conn->cipher_type) 1060 break; 1061 1062 decode_encrypt_ctxt(conn, 1063 (struct smb2_encryption_neg_context *)pctx, 1064 ctxt_len); 1065 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1066 ksmbd_debug(SMB, 1067 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1068 if (conn->compress_algorithm) 1069 break; 1070 1071 decode_compress_ctxt(conn, 1072 (struct smb2_compression_capabilities_context *)pctx); 1073 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1074 ksmbd_debug(SMB, 1075 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1076 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1077 ksmbd_debug(SMB, 1078 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1079 conn->posix_ext_supported = true; 1080 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1081 ksmbd_debug(SMB, 1082 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1083 1084 decode_sign_cap_ctxt(conn, 1085 (struct smb2_signing_capabilities *)pctx, 1086 ctxt_len); 1087 } 1088 1089 /* offsets must be 8 byte aligned */ 1090 offset = (ctxt_len + 7) & ~0x7; 1091 len_of_ctxts -= offset; 1092 } 1093 return status; 1094 } 1095 1096 /** 1097 * smb2_handle_negotiate() - handler for smb2 negotiate command 1098 * @work: smb work containing smb request buffer 1099 * 1100 * Return: 0 1101 */ 1102 int smb2_handle_negotiate(struct ksmbd_work *work) 1103 { 1104 struct ksmbd_conn *conn = work->conn; 1105 struct smb2_negotiate_req *req = smb_get_msg(work->request_buf); 1106 struct smb2_negotiate_rsp *rsp = smb_get_msg(work->response_buf); 1107 int rc = 0; 1108 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1109 __le32 status; 1110 1111 ksmbd_debug(SMB, "Received negotiate request\n"); 1112 conn->need_neg = false; 1113 if (ksmbd_conn_good(conn)) { 1114 pr_err("conn->tcp_status is already in CifsGood State\n"); 1115 work->send_no_response = 1; 1116 return rc; 1117 } 1118 1119 ksmbd_conn_lock(conn); 1120 smb2_buf_len = get_rfc1002_len(work->request_buf); 1121 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1122 if (smb2_neg_size > smb2_buf_len) { 1123 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1124 rc = -EINVAL; 1125 goto err_out; 1126 } 1127 1128 if (req->DialectCount == 0) { 1129 pr_err("malformed packet\n"); 1130 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1131 rc = -EINVAL; 1132 goto err_out; 1133 } 1134 1135 if (conn->dialect == SMB311_PROT_ID) { 1136 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1137 1138 if (smb2_buf_len < nego_ctxt_off) { 1139 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1140 rc = -EINVAL; 1141 goto err_out; 1142 } 1143 1144 if (smb2_neg_size > nego_ctxt_off) { 1145 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1146 rc = -EINVAL; 1147 goto err_out; 1148 } 1149 1150 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1151 nego_ctxt_off) { 1152 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1153 rc = -EINVAL; 1154 goto err_out; 1155 } 1156 } else { 1157 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1158 smb2_buf_len) { 1159 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1160 rc = -EINVAL; 1161 goto err_out; 1162 } 1163 } 1164 1165 conn->cli_cap = le32_to_cpu(req->Capabilities); 1166 switch (conn->dialect) { 1167 case SMB311_PROT_ID: 1168 conn->preauth_info = 1169 kzalloc_obj(struct preauth_integrity_info, 1170 KSMBD_DEFAULT_GFP); 1171 if (!conn->preauth_info) { 1172 rc = -ENOMEM; 1173 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1174 goto err_out; 1175 } 1176 1177 status = deassemble_neg_contexts(conn, req, 1178 get_rfc1002_len(work->request_buf)); 1179 if (status != STATUS_SUCCESS) { 1180 pr_err("deassemble_neg_contexts error(0x%x)\n", 1181 status); 1182 rsp->hdr.Status = status; 1183 rc = -EINVAL; 1184 kfree(conn->preauth_info); 1185 conn->preauth_info = NULL; 1186 goto err_out; 1187 } 1188 1189 rc = init_smb3_11_server(conn); 1190 if (rc < 0) { 1191 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1192 kfree(conn->preauth_info); 1193 conn->preauth_info = NULL; 1194 goto err_out; 1195 } 1196 1197 ksmbd_gen_preauth_integrity_hash(conn, 1198 work->request_buf, 1199 conn->preauth_info->Preauth_HashValue); 1200 rsp->NegotiateContextOffset = 1201 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1202 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1203 break; 1204 case SMB302_PROT_ID: 1205 init_smb3_02_server(conn); 1206 break; 1207 case SMB30_PROT_ID: 1208 init_smb3_0_server(conn); 1209 break; 1210 case SMB21_PROT_ID: 1211 init_smb2_1_server(conn); 1212 break; 1213 case SMB2X_PROT_ID: 1214 case BAD_PROT_ID: 1215 default: 1216 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1217 conn->dialect); 1218 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1219 rc = -EINVAL; 1220 goto err_out; 1221 } 1222 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 1223 1224 /* For stats */ 1225 conn->connection_type = conn->dialect; 1226 1227 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1228 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1229 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1230 1231 memcpy(conn->ClientGUID, req->ClientGUID, 1232 SMB2_CLIENT_GUID_SIZE); 1233 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1234 1235 rsp->StructureSize = cpu_to_le16(65); 1236 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1237 /* Not setting conn guid rsp->ServerGUID, as it 1238 * not used by client for identifying server 1239 */ 1240 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1241 1242 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1243 rsp->ServerStartTime = 0; 1244 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1245 le32_to_cpu(rsp->NegotiateContextOffset), 1246 le16_to_cpu(rsp->NegotiateContextCount)); 1247 1248 rsp->SecurityBufferOffset = cpu_to_le16(128); 1249 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1250 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1251 le16_to_cpu(rsp->SecurityBufferOffset)); 1252 1253 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1254 conn->use_spnego = true; 1255 1256 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1257 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1258 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1259 conn->sign = true; 1260 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1261 server_conf.enforced_signing = true; 1262 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1263 conn->sign = true; 1264 } 1265 1266 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1267 ksmbd_conn_set_need_setup(conn); 1268 1269 err_out: 1270 ksmbd_conn_unlock(conn); 1271 if (rc) 1272 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1273 1274 if (!rc) 1275 rc = ksmbd_iov_pin_rsp(work, rsp, 1276 sizeof(struct smb2_negotiate_rsp) + 1277 AUTH_GSS_LENGTH + neg_ctxt_len); 1278 if (rc < 0) 1279 smb2_set_err_rsp(work); 1280 return rc; 1281 } 1282 1283 static int alloc_preauth_hash(struct ksmbd_session *sess, 1284 struct ksmbd_conn *conn) 1285 { 1286 if (sess->Preauth_HashValue) 1287 return 0; 1288 1289 if (!conn->preauth_info) 1290 return -ENOMEM; 1291 1292 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1293 PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP); 1294 if (!sess->Preauth_HashValue) 1295 return -ENOMEM; 1296 1297 return 0; 1298 } 1299 1300 static int generate_preauth_hash(struct ksmbd_work *work) 1301 { 1302 struct ksmbd_conn *conn = work->conn; 1303 struct ksmbd_session *sess = work->sess; 1304 u8 *preauth_hash; 1305 1306 if (conn->dialect != SMB311_PROT_ID) 1307 return 0; 1308 1309 if (conn->binding) { 1310 struct preauth_session *preauth_sess; 1311 1312 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1313 if (!preauth_sess) { 1314 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1315 if (!preauth_sess) 1316 return -ENOMEM; 1317 } 1318 1319 preauth_hash = preauth_sess->Preauth_HashValue; 1320 } else { 1321 if (!sess->Preauth_HashValue) 1322 if (alloc_preauth_hash(sess, conn)) 1323 return -ENOMEM; 1324 preauth_hash = sess->Preauth_HashValue; 1325 } 1326 1327 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1328 return 0; 1329 } 1330 1331 static int decode_negotiation_token(struct ksmbd_conn *conn, 1332 struct negotiate_message *negblob, 1333 size_t sz) 1334 { 1335 if (!conn->use_spnego) 1336 return -EINVAL; 1337 1338 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1339 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1340 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1341 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1342 conn->use_spnego = false; 1343 } 1344 } 1345 return 0; 1346 } 1347 1348 static int ntlm_negotiate(struct ksmbd_work *work, 1349 struct negotiate_message *negblob, 1350 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1351 { 1352 struct challenge_message *chgblob; 1353 unsigned char *spnego_blob = NULL; 1354 u16 spnego_blob_len; 1355 char *neg_blob; 1356 int sz, rc; 1357 1358 ksmbd_debug(SMB, "negotiate phase\n"); 1359 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1360 if (rc) 1361 return rc; 1362 1363 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1364 chgblob = (struct challenge_message *)rsp->Buffer; 1365 memset(chgblob, 0, sizeof(struct challenge_message)); 1366 1367 if (!work->conn->use_spnego) { 1368 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1369 if (sz < 0) 1370 return -ENOMEM; 1371 1372 rsp->SecurityBufferLength = cpu_to_le16(sz); 1373 return 0; 1374 } 1375 1376 sz = sizeof(struct challenge_message); 1377 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1378 1379 neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP); 1380 if (!neg_blob) 1381 return -ENOMEM; 1382 1383 chgblob = (struct challenge_message *)neg_blob; 1384 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1385 if (sz < 0) { 1386 rc = -ENOMEM; 1387 goto out; 1388 } 1389 1390 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1391 neg_blob, sz); 1392 if (rc) { 1393 rc = -ENOMEM; 1394 goto out; 1395 } 1396 1397 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1398 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1399 1400 out: 1401 kfree(spnego_blob); 1402 kfree(neg_blob); 1403 return rc; 1404 } 1405 1406 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1407 struct smb2_sess_setup_req *req) 1408 { 1409 int sz; 1410 1411 if (conn->use_spnego && conn->mechToken) 1412 return (struct authenticate_message *)conn->mechToken; 1413 1414 sz = le16_to_cpu(req->SecurityBufferOffset); 1415 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1416 + sz); 1417 } 1418 1419 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1420 struct smb2_sess_setup_req *req) 1421 { 1422 struct authenticate_message *authblob; 1423 struct ksmbd_user *user; 1424 char *name; 1425 unsigned int name_off, name_len, secbuf_len; 1426 1427 if (conn->use_spnego && conn->mechToken) 1428 secbuf_len = conn->mechTokenLen; 1429 else 1430 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1431 if (secbuf_len < sizeof(struct authenticate_message)) { 1432 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1433 return NULL; 1434 } 1435 authblob = user_authblob(conn, req); 1436 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1437 name_len = le16_to_cpu(authblob->UserName.Length); 1438 1439 if (secbuf_len < (u64)name_off + name_len) 1440 return NULL; 1441 1442 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1443 name_len, 1444 true, 1445 conn->local_nls); 1446 if (IS_ERR(name)) { 1447 pr_err("cannot allocate memory\n"); 1448 return NULL; 1449 } 1450 1451 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1452 user = ksmbd_login_user(name); 1453 kfree(name); 1454 return user; 1455 } 1456 1457 static int ntlm_authenticate(struct ksmbd_work *work, 1458 struct smb2_sess_setup_req *req, 1459 struct smb2_sess_setup_rsp *rsp) 1460 { 1461 struct ksmbd_conn *conn = work->conn; 1462 struct ksmbd_session *sess = work->sess; 1463 struct channel *chann = NULL, *old; 1464 struct ksmbd_user *user; 1465 u64 prev_id; 1466 int sz, rc; 1467 1468 ksmbd_debug(SMB, "authenticate phase\n"); 1469 if (conn->use_spnego) { 1470 unsigned char *spnego_blob; 1471 u16 spnego_blob_len; 1472 1473 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1474 &spnego_blob_len, 1475 0); 1476 if (rc) 1477 return -ENOMEM; 1478 1479 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1480 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1481 kfree(spnego_blob); 1482 } 1483 1484 user = session_user(conn, req); 1485 if (!user) { 1486 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1487 return -EPERM; 1488 } 1489 1490 /* Check for previous session */ 1491 prev_id = le64_to_cpu(req->PreviousSessionId); 1492 if (prev_id && prev_id != sess->id) 1493 destroy_previous_session(conn, user, prev_id); 1494 1495 if (sess->state == SMB2_SESSION_VALID) { 1496 /* 1497 * Reuse session if anonymous try to connect 1498 * on reauthetication. 1499 */ 1500 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1501 ksmbd_free_user(user); 1502 return 0; 1503 } 1504 1505 if (!ksmbd_compare_user(sess->user, user)) { 1506 ksmbd_free_user(user); 1507 return -EPERM; 1508 } 1509 ksmbd_free_user(user); 1510 } else { 1511 sess->user = user; 1512 } 1513 1514 if (conn->binding == false && user_guest(sess->user)) { 1515 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1516 } else { 1517 struct authenticate_message *authblob; 1518 1519 authblob = user_authblob(conn, req); 1520 if (conn->use_spnego && conn->mechToken) 1521 sz = conn->mechTokenLen; 1522 else 1523 sz = le16_to_cpu(req->SecurityBufferLength); 1524 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1525 if (rc) { 1526 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1527 ksmbd_debug(SMB, "authentication failed\n"); 1528 return -EPERM; 1529 } 1530 } 1531 1532 /* 1533 * If session state is SMB2_SESSION_VALID, We can assume 1534 * that it is reauthentication. And the user/password 1535 * has been verified, so return it here. 1536 */ 1537 if (sess->state == SMB2_SESSION_VALID) { 1538 if (conn->binding) 1539 goto binding_session; 1540 return 0; 1541 } 1542 1543 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1544 (conn->sign || server_conf.enforced_signing)) || 1545 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1546 sess->sign = true; 1547 1548 if (smb3_encryption_negotiated(conn) && 1549 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1550 conn->ops->generate_encryptionkey(conn, sess); 1551 sess->enc = true; 1552 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1553 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1554 /* 1555 * signing is disable if encryption is enable 1556 * on this session 1557 */ 1558 sess->sign = false; 1559 } 1560 1561 binding_session: 1562 if (conn->dialect >= SMB30_PROT_ID) { 1563 chann = lookup_chann_list(sess, conn); 1564 if (!chann) { 1565 chann = kmalloc_obj(struct channel, KSMBD_DEFAULT_GFP); 1566 if (!chann) 1567 return -ENOMEM; 1568 1569 chann->conn = conn; 1570 down_write(&sess->chann_lock); 1571 old = xa_store(&sess->ksmbd_chann_list, (long)conn, chann, 1572 KSMBD_DEFAULT_GFP); 1573 up_write(&sess->chann_lock); 1574 if (xa_is_err(old)) { 1575 kfree(chann); 1576 return xa_err(old); 1577 } 1578 } 1579 } 1580 1581 if (conn->ops->generate_signingkey) { 1582 rc = conn->ops->generate_signingkey(sess, conn); 1583 if (rc) { 1584 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1585 return -EINVAL; 1586 } 1587 } 1588 1589 if (!ksmbd_conn_lookup_dialect(conn)) { 1590 pr_err("fail to verify the dialect\n"); 1591 return -ENOENT; 1592 } 1593 return 0; 1594 } 1595 1596 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1597 static int krb5_authenticate(struct ksmbd_work *work, 1598 struct smb2_sess_setup_req *req, 1599 struct smb2_sess_setup_rsp *rsp) 1600 { 1601 struct ksmbd_conn *conn = work->conn; 1602 struct ksmbd_session *sess = work->sess; 1603 char *in_blob, *out_blob; 1604 struct channel *chann = NULL, *old; 1605 u64 prev_sess_id; 1606 int in_len, out_len; 1607 int retval; 1608 1609 in_blob = (char *)&req->hdr.ProtocolId + 1610 le16_to_cpu(req->SecurityBufferOffset); 1611 in_len = le16_to_cpu(req->SecurityBufferLength); 1612 out_blob = (char *)&rsp->hdr.ProtocolId + 1613 le16_to_cpu(rsp->SecurityBufferOffset); 1614 out_len = work->response_sz - 1615 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1616 1617 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1618 out_blob, &out_len); 1619 if (retval) { 1620 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1621 return -EINVAL; 1622 } 1623 1624 /* Check previous session */ 1625 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1626 if (prev_sess_id && prev_sess_id != sess->id) 1627 destroy_previous_session(conn, sess->user, prev_sess_id); 1628 1629 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1630 1631 /* 1632 * If session state is SMB2_SESSION_VALID, We can assume 1633 * that it is reauthentication. And the user/password 1634 * has been verified, so return it here. 1635 */ 1636 if (sess->state == SMB2_SESSION_VALID) { 1637 if (conn->binding) 1638 goto binding_session; 1639 return 0; 1640 } 1641 1642 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1643 (conn->sign || server_conf.enforced_signing)) || 1644 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1645 sess->sign = true; 1646 1647 if (smb3_encryption_negotiated(conn) && 1648 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1649 conn->ops->generate_encryptionkey(conn, sess); 1650 sess->enc = true; 1651 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1652 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1653 sess->sign = false; 1654 } 1655 1656 binding_session: 1657 if (conn->dialect >= SMB30_PROT_ID) { 1658 chann = lookup_chann_list(sess, conn); 1659 if (!chann) { 1660 chann = kmalloc_obj(struct channel, KSMBD_DEFAULT_GFP); 1661 if (!chann) 1662 return -ENOMEM; 1663 1664 chann->conn = conn; 1665 down_write(&sess->chann_lock); 1666 old = xa_store(&sess->ksmbd_chann_list, (long)conn, 1667 chann, KSMBD_DEFAULT_GFP); 1668 up_write(&sess->chann_lock); 1669 if (xa_is_err(old)) { 1670 kfree(chann); 1671 return xa_err(old); 1672 } 1673 } 1674 } 1675 1676 if (conn->ops->generate_signingkey) { 1677 retval = conn->ops->generate_signingkey(sess, conn); 1678 if (retval) { 1679 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1680 return -EINVAL; 1681 } 1682 } 1683 1684 if (!ksmbd_conn_lookup_dialect(conn)) { 1685 pr_err("fail to verify the dialect\n"); 1686 return -ENOENT; 1687 } 1688 return 0; 1689 } 1690 #else 1691 static int krb5_authenticate(struct ksmbd_work *work, 1692 struct smb2_sess_setup_req *req, 1693 struct smb2_sess_setup_rsp *rsp) 1694 { 1695 return -EOPNOTSUPP; 1696 } 1697 #endif 1698 1699 int smb2_sess_setup(struct ksmbd_work *work) 1700 { 1701 struct ksmbd_conn *conn = work->conn; 1702 struct smb2_sess_setup_req *req; 1703 struct smb2_sess_setup_rsp *rsp; 1704 struct ksmbd_session *sess; 1705 struct negotiate_message *negblob; 1706 unsigned int negblob_len, negblob_off; 1707 int rc = 0; 1708 1709 ksmbd_debug(SMB, "Received smb2 session setup request\n"); 1710 1711 if (!ksmbd_conn_need_setup(conn) && !ksmbd_conn_good(conn)) { 1712 work->send_no_response = 1; 1713 return rc; 1714 } 1715 1716 WORK_BUFFERS(work, req, rsp); 1717 1718 rsp->StructureSize = cpu_to_le16(9); 1719 rsp->SessionFlags = 0; 1720 rsp->SecurityBufferOffset = cpu_to_le16(72); 1721 rsp->SecurityBufferLength = 0; 1722 1723 ksmbd_conn_lock(conn); 1724 if (!req->hdr.SessionId) { 1725 sess = ksmbd_smb2_session_create(); 1726 if (!sess) { 1727 rc = -ENOMEM; 1728 goto out_err; 1729 } 1730 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1731 rc = ksmbd_session_register(conn, sess); 1732 if (rc) 1733 goto out_err; 1734 1735 conn->binding = false; 1736 } else if (conn->dialect >= SMB30_PROT_ID && 1737 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1738 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1739 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1740 1741 sess = ksmbd_session_lookup_slowpath(sess_id); 1742 if (!sess) { 1743 rc = -ENOENT; 1744 goto out_err; 1745 } 1746 1747 if (conn->dialect != sess->dialect) { 1748 rc = -EINVAL; 1749 goto out_err; 1750 } 1751 1752 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1753 rc = -EINVAL; 1754 goto out_err; 1755 } 1756 1757 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1758 SMB2_CLIENT_GUID_SIZE)) { 1759 rc = -ENOENT; 1760 goto out_err; 1761 } 1762 1763 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1764 rc = -EACCES; 1765 goto out_err; 1766 } 1767 1768 if (sess->state == SMB2_SESSION_EXPIRED) { 1769 rc = -EFAULT; 1770 goto out_err; 1771 } 1772 1773 if (ksmbd_conn_need_reconnect(conn)) { 1774 rc = -EFAULT; 1775 ksmbd_user_session_put(sess); 1776 sess = NULL; 1777 goto out_err; 1778 } 1779 1780 if (is_ksmbd_session_in_connection(conn, sess_id)) { 1781 rc = -EACCES; 1782 goto out_err; 1783 } 1784 1785 if (user_guest(sess->user)) { 1786 rc = -EOPNOTSUPP; 1787 goto out_err; 1788 } 1789 1790 conn->binding = true; 1791 } else if ((conn->dialect < SMB30_PROT_ID || 1792 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1793 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1794 sess = NULL; 1795 rc = -EACCES; 1796 goto out_err; 1797 } else { 1798 sess = ksmbd_session_lookup(conn, 1799 le64_to_cpu(req->hdr.SessionId)); 1800 if (!sess) { 1801 rc = -ENOENT; 1802 goto out_err; 1803 } 1804 1805 if (sess->state == SMB2_SESSION_EXPIRED) { 1806 rc = -EFAULT; 1807 goto out_err; 1808 } 1809 1810 if (ksmbd_conn_need_reconnect(conn)) { 1811 rc = -EFAULT; 1812 ksmbd_user_session_put(sess); 1813 sess = NULL; 1814 goto out_err; 1815 } 1816 1817 conn->binding = false; 1818 } 1819 work->sess = sess; 1820 1821 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1822 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1823 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { 1824 rc = -EINVAL; 1825 goto out_err; 1826 } 1827 1828 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1829 negblob_off); 1830 1831 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1832 if (conn->mechToken) { 1833 negblob = (struct negotiate_message *)conn->mechToken; 1834 negblob_len = conn->mechTokenLen; 1835 } 1836 } 1837 1838 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1839 rc = -EINVAL; 1840 goto out_err; 1841 } 1842 1843 if (server_conf.auth_mechs & conn->auth_mechs) { 1844 rc = generate_preauth_hash(work); 1845 if (rc) 1846 goto out_err; 1847 1848 if (conn->preferred_auth_mech & 1849 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1850 rc = krb5_authenticate(work, req, rsp); 1851 if (rc) { 1852 rc = -EINVAL; 1853 goto out_err; 1854 } 1855 1856 if (!ksmbd_conn_need_reconnect(conn)) { 1857 ksmbd_conn_set_good(conn); 1858 sess->state = SMB2_SESSION_VALID; 1859 } 1860 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1861 if (negblob->MessageType == NtLmNegotiate) { 1862 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1863 if (rc) 1864 goto out_err; 1865 rsp->hdr.Status = 1866 STATUS_MORE_PROCESSING_REQUIRED; 1867 } else if (negblob->MessageType == NtLmAuthenticate) { 1868 rc = ntlm_authenticate(work, req, rsp); 1869 if (rc) 1870 goto out_err; 1871 1872 if (!ksmbd_conn_need_reconnect(conn)) { 1873 ksmbd_conn_set_good(conn); 1874 sess->state = SMB2_SESSION_VALID; 1875 } 1876 if (conn->binding) { 1877 struct preauth_session *preauth_sess; 1878 1879 preauth_sess = 1880 ksmbd_preauth_session_lookup(conn, sess->id); 1881 if (preauth_sess) { 1882 list_del(&preauth_sess->preauth_entry); 1883 kfree(preauth_sess); 1884 } 1885 } 1886 } else { 1887 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1888 le32_to_cpu(negblob->MessageType)); 1889 rc = -EINVAL; 1890 } 1891 } else { 1892 /* TODO: need one more negotiation */ 1893 pr_err("Not support the preferred authentication\n"); 1894 rc = -EINVAL; 1895 } 1896 } else { 1897 pr_err("Not support authentication\n"); 1898 rc = -EINVAL; 1899 } 1900 1901 out_err: 1902 if (rc == -EINVAL) 1903 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1904 else if (rc == -ENOENT) 1905 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1906 else if (rc == -EACCES) 1907 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1908 else if (rc == -EFAULT) 1909 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1910 else if (rc == -ENOMEM) 1911 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1912 else if (rc == -EOPNOTSUPP) 1913 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1914 else if (rc) 1915 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1916 1917 if (conn->mechToken) { 1918 kfree(conn->mechToken); 1919 conn->mechToken = NULL; 1920 } 1921 1922 if (rc < 0) { 1923 /* 1924 * SecurityBufferOffset should be set to zero 1925 * in session setup error response. 1926 */ 1927 rsp->SecurityBufferOffset = 0; 1928 1929 if (sess) { 1930 bool try_delay = false; 1931 1932 /* 1933 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1934 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1935 * failure to make it harder to send enough random connection requests 1936 * to break into a server. 1937 */ 1938 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1939 try_delay = true; 1940 1941 /* 1942 * For binding requests, session belongs to another 1943 * connection. Do not expire it. 1944 */ 1945 if (!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1946 sess->last_active = jiffies; 1947 sess->state = SMB2_SESSION_EXPIRED; 1948 } 1949 ksmbd_user_session_put(sess); 1950 work->sess = NULL; 1951 if (try_delay) { 1952 ksmbd_conn_set_need_reconnect(conn); 1953 ssleep(5); 1954 ksmbd_conn_set_need_setup(conn); 1955 } 1956 } 1957 smb2_set_err_rsp(work); 1958 conn->binding = false; 1959 } else { 1960 unsigned int iov_len; 1961 1962 if (rsp->SecurityBufferLength) 1963 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1964 le16_to_cpu(rsp->SecurityBufferLength); 1965 else 1966 iov_len = sizeof(struct smb2_sess_setup_rsp); 1967 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1968 if (rc) 1969 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1970 } 1971 1972 ksmbd_conn_unlock(conn); 1973 return rc; 1974 } 1975 1976 /** 1977 * smb2_tree_connect() - handler for smb2 tree connect command 1978 * @work: smb work containing smb request buffer 1979 * 1980 * Return: 0 on success, otherwise error 1981 */ 1982 int smb2_tree_connect(struct ksmbd_work *work) 1983 { 1984 struct ksmbd_conn *conn = work->conn; 1985 struct smb2_tree_connect_req *req; 1986 struct smb2_tree_connect_rsp *rsp; 1987 struct ksmbd_session *sess = work->sess; 1988 char *treename = NULL, *name = NULL; 1989 struct ksmbd_tree_conn_status status; 1990 struct ksmbd_share_config *share = NULL; 1991 int rc = -EINVAL; 1992 1993 ksmbd_debug(SMB, "Received smb2 tree connect request\n"); 1994 1995 WORK_BUFFERS(work, req, rsp); 1996 1997 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), 1998 le16_to_cpu(req->PathLength), true, 1999 conn->local_nls); 2000 if (IS_ERR(treename)) { 2001 pr_err("treename is NULL\n"); 2002 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 2003 goto out_err1; 2004 } 2005 2006 name = ksmbd_extract_sharename(conn->um, treename); 2007 if (IS_ERR(name)) { 2008 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 2009 goto out_err1; 2010 } 2011 2012 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 2013 name, treename); 2014 2015 status = ksmbd_tree_conn_connect(work, name); 2016 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 2017 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 2018 else 2019 goto out_err1; 2020 2021 share = status.tree_conn->share_conf; 2022 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2023 ksmbd_debug(SMB, "IPC share path request\n"); 2024 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 2025 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2026 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 2027 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 2028 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2029 FILE_SYNCHRONIZE_LE; 2030 } else { 2031 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 2032 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2033 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 2034 if (test_tree_conn_flag(status.tree_conn, 2035 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2036 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 2037 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 2038 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 2039 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 2040 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2041 FILE_SYNCHRONIZE_LE; 2042 } 2043 } 2044 2045 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 2046 if (conn->posix_ext_supported) 2047 status.tree_conn->posix_extensions = true; 2048 2049 down_write(&sess->tree_conns_lock); 2050 status.tree_conn->t_state = TREE_CONNECTED; 2051 up_write(&sess->tree_conns_lock); 2052 rsp->StructureSize = cpu_to_le16(16); 2053 out_err1: 2054 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share && 2055 test_share_config_flag(share, 2056 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 2057 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY; 2058 else 2059 rsp->Capabilities = 0; 2060 rsp->Reserved = 0; 2061 /* default manual caching */ 2062 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2063 2064 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2065 if (rc) 2066 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2067 2068 if (!IS_ERR(treename)) 2069 kfree(treename); 2070 if (!IS_ERR(name)) 2071 kfree(name); 2072 2073 switch (status.ret) { 2074 case KSMBD_TREE_CONN_STATUS_OK: 2075 rsp->hdr.Status = STATUS_SUCCESS; 2076 rc = 0; 2077 break; 2078 case -ESTALE: 2079 case -ENOENT: 2080 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2081 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2082 break; 2083 case -ENOMEM: 2084 case KSMBD_TREE_CONN_STATUS_NOMEM: 2085 rsp->hdr.Status = STATUS_NO_MEMORY; 2086 break; 2087 case KSMBD_TREE_CONN_STATUS_ERROR: 2088 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2089 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2090 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2091 break; 2092 case -EINVAL: 2093 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2094 break; 2095 default: 2096 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2097 } 2098 2099 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2100 smb2_set_err_rsp(work); 2101 2102 return rc; 2103 } 2104 2105 /** 2106 * smb2_create_open_flags() - convert smb open flags to unix open flags 2107 * @file_present: is file already present 2108 * @access: file access flags 2109 * @disposition: file disposition flags 2110 * @may_flags: set with MAY_ flags 2111 * @coptions: file creation options 2112 * @mode: file mode 2113 * 2114 * Return: file open flags 2115 */ 2116 static int smb2_create_open_flags(bool file_present, __le32 access, 2117 __le32 disposition, 2118 int *may_flags, 2119 __le32 coptions, 2120 umode_t mode) 2121 { 2122 int oflags = O_NONBLOCK | O_LARGEFILE; 2123 2124 if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) { 2125 access &= ~FILE_WRITE_DESIRE_ACCESS_LE; 2126 ksmbd_debug(SMB, "Discard write access to a directory\n"); 2127 } 2128 2129 if (access & FILE_READ_DESIRED_ACCESS_LE && 2130 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2131 oflags |= O_RDWR; 2132 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2133 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2134 oflags |= O_WRONLY; 2135 *may_flags = MAY_OPEN | MAY_WRITE; 2136 } else { 2137 oflags |= O_RDONLY; 2138 *may_flags = MAY_OPEN | MAY_READ; 2139 } 2140 2141 if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode)) 2142 oflags |= O_PATH; 2143 2144 if (file_present) { 2145 switch (disposition & FILE_CREATE_MASK_LE) { 2146 case FILE_OPEN_LE: 2147 case FILE_CREATE_LE: 2148 break; 2149 case FILE_SUPERSEDE_LE: 2150 case FILE_OVERWRITE_LE: 2151 case FILE_OVERWRITE_IF_LE: 2152 oflags |= O_TRUNC; 2153 break; 2154 default: 2155 break; 2156 } 2157 } else { 2158 switch (disposition & FILE_CREATE_MASK_LE) { 2159 case FILE_SUPERSEDE_LE: 2160 case FILE_CREATE_LE: 2161 case FILE_OPEN_IF_LE: 2162 case FILE_OVERWRITE_IF_LE: 2163 oflags |= O_CREAT; 2164 break; 2165 case FILE_OPEN_LE: 2166 case FILE_OVERWRITE_LE: 2167 oflags &= ~O_CREAT; 2168 break; 2169 default: 2170 break; 2171 } 2172 } 2173 2174 return oflags; 2175 } 2176 2177 /** 2178 * smb2_tree_disconnect() - handler for smb tree connect request 2179 * @work: smb work containing request buffer 2180 * 2181 * Return: 0 on success, otherwise error 2182 */ 2183 int smb2_tree_disconnect(struct ksmbd_work *work) 2184 { 2185 struct smb2_tree_disconnect_rsp *rsp; 2186 struct smb2_tree_disconnect_req *req; 2187 struct ksmbd_session *sess = work->sess; 2188 struct ksmbd_tree_connect *tcon = work->tcon; 2189 int err; 2190 2191 ksmbd_debug(SMB, "Received smb2 tree disconnect request\n"); 2192 2193 WORK_BUFFERS(work, req, rsp); 2194 2195 if (!tcon) { 2196 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2197 2198 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2199 err = -ENOENT; 2200 goto err_out; 2201 } 2202 2203 ksmbd_close_tree_conn_fds(work); 2204 2205 down_write(&sess->tree_conns_lock); 2206 if (tcon->t_state == TREE_DISCONNECTED) { 2207 up_write(&sess->tree_conns_lock); 2208 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2209 err = -ENOENT; 2210 goto err_out; 2211 } 2212 2213 tcon->t_state = TREE_DISCONNECTED; 2214 up_write(&sess->tree_conns_lock); 2215 2216 err = ksmbd_tree_conn_disconnect(sess, tcon); 2217 if (err) { 2218 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2219 goto err_out; 2220 } 2221 2222 rsp->StructureSize = cpu_to_le16(4); 2223 err = ksmbd_iov_pin_rsp(work, rsp, 2224 sizeof(struct smb2_tree_disconnect_rsp)); 2225 if (err) { 2226 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2227 goto err_out; 2228 } 2229 2230 return 0; 2231 2232 err_out: 2233 smb2_set_err_rsp(work); 2234 return err; 2235 2236 } 2237 2238 /** 2239 * smb2_session_logoff() - handler for session log off request 2240 * @work: smb work containing request buffer 2241 * 2242 * Return: 0 on success, otherwise error 2243 */ 2244 int smb2_session_logoff(struct ksmbd_work *work) 2245 { 2246 struct ksmbd_conn *conn = work->conn; 2247 struct ksmbd_session *sess = work->sess; 2248 struct smb2_logoff_req *req; 2249 struct smb2_logoff_rsp *rsp; 2250 u64 sess_id; 2251 int err; 2252 2253 WORK_BUFFERS(work, req, rsp); 2254 2255 ksmbd_debug(SMB, "Received smb2 session logoff request\n"); 2256 2257 ksmbd_conn_lock(conn); 2258 if (!ksmbd_conn_good(conn)) { 2259 ksmbd_conn_unlock(conn); 2260 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2261 smb2_set_err_rsp(work); 2262 return -ENOENT; 2263 } 2264 sess_id = le64_to_cpu(req->hdr.SessionId); 2265 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2266 ksmbd_conn_unlock(conn); 2267 2268 ksmbd_close_session_fds(work); 2269 ksmbd_conn_wait_idle(conn); 2270 2271 if (ksmbd_tree_conn_session_logoff(sess)) { 2272 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2273 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2274 smb2_set_err_rsp(work); 2275 return -ENOENT; 2276 } 2277 2278 down_write(&conn->session_lock); 2279 sess->state = SMB2_SESSION_EXPIRED; 2280 up_write(&conn->session_lock); 2281 2282 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_SETUP); 2283 2284 rsp->StructureSize = cpu_to_le16(4); 2285 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2286 if (err) { 2287 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2288 smb2_set_err_rsp(work); 2289 return err; 2290 } 2291 return 0; 2292 } 2293 2294 /** 2295 * create_smb2_pipe() - create IPC pipe 2296 * @work: smb work containing request buffer 2297 * 2298 * Return: 0 on success, otherwise error 2299 */ 2300 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2301 { 2302 struct smb2_create_rsp *rsp; 2303 struct smb2_create_req *req; 2304 int id = -1; 2305 int err; 2306 char *name; 2307 2308 WORK_BUFFERS(work, req, rsp); 2309 2310 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2311 1, work->conn->local_nls); 2312 if (IS_ERR(name)) { 2313 rsp->hdr.Status = STATUS_NO_MEMORY; 2314 err = PTR_ERR(name); 2315 goto out; 2316 } 2317 2318 id = ksmbd_session_rpc_open(work->sess, name); 2319 if (id < 0) { 2320 pr_err("Unable to open RPC pipe: %d\n", id); 2321 err = id; 2322 goto out; 2323 } 2324 2325 rsp->hdr.Status = STATUS_SUCCESS; 2326 rsp->StructureSize = cpu_to_le16(89); 2327 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2328 rsp->Flags = 0; 2329 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2330 2331 rsp->CreationTime = cpu_to_le64(0); 2332 rsp->LastAccessTime = cpu_to_le64(0); 2333 rsp->ChangeTime = cpu_to_le64(0); 2334 rsp->AllocationSize = cpu_to_le64(0); 2335 rsp->EndofFile = cpu_to_le64(0); 2336 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2337 rsp->Reserved2 = 0; 2338 rsp->VolatileFileId = id; 2339 rsp->PersistentFileId = 0; 2340 rsp->CreateContextsOffset = 0; 2341 rsp->CreateContextsLength = 0; 2342 2343 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2344 if (err) 2345 goto out; 2346 2347 kfree(name); 2348 return 0; 2349 2350 out: 2351 switch (err) { 2352 case -EINVAL: 2353 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2354 break; 2355 case -ENOSPC: 2356 case -ENOMEM: 2357 rsp->hdr.Status = STATUS_NO_MEMORY; 2358 break; 2359 } 2360 2361 if (id >= 0) 2362 ksmbd_session_rpc_close(work->sess, id); 2363 2364 if (!IS_ERR(name)) 2365 kfree(name); 2366 2367 smb2_set_err_rsp(work); 2368 return err; 2369 } 2370 2371 /** 2372 * smb2_set_ea() - handler for setting extended attributes using set 2373 * info command 2374 * @eabuf: set info command buffer 2375 * @buf_len: set info command buffer length 2376 * @path: dentry path for get ea 2377 * @get_write: get write access to a mount 2378 * 2379 * Return: 0 on success, otherwise error 2380 */ 2381 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2382 const struct path *path, bool get_write) 2383 { 2384 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2385 char *attr_name = NULL, *value; 2386 int rc = 0; 2387 unsigned int next = 0; 2388 2389 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2390 le16_to_cpu(eabuf->EaValueLength)) 2391 return -EINVAL; 2392 2393 attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP); 2394 if (!attr_name) 2395 return -ENOMEM; 2396 2397 do { 2398 if (!eabuf->EaNameLength) 2399 goto next; 2400 2401 ksmbd_debug(SMB, 2402 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2403 eabuf->name, eabuf->EaNameLength, 2404 le16_to_cpu(eabuf->EaValueLength), 2405 le32_to_cpu(eabuf->NextEntryOffset)); 2406 2407 if (eabuf->EaNameLength > 2408 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2409 rc = -EINVAL; 2410 break; 2411 } 2412 2413 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2414 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2415 eabuf->EaNameLength); 2416 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2417 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2418 2419 if (!eabuf->EaValueLength) { 2420 rc = ksmbd_vfs_casexattr_len(idmap, 2421 path->dentry, 2422 attr_name, 2423 XATTR_USER_PREFIX_LEN + 2424 eabuf->EaNameLength); 2425 2426 /* delete the EA only when it exits */ 2427 if (rc > 0) { 2428 rc = ksmbd_vfs_remove_xattr(idmap, 2429 path, 2430 attr_name, 2431 get_write); 2432 2433 if (rc < 0) { 2434 ksmbd_debug(SMB, 2435 "remove xattr failed(%d)\n", 2436 rc); 2437 break; 2438 } 2439 } 2440 2441 /* if the EA doesn't exist, just do nothing. */ 2442 rc = 0; 2443 } else { 2444 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2445 le16_to_cpu(eabuf->EaValueLength), 2446 0, get_write); 2447 if (rc < 0) { 2448 ksmbd_debug(SMB, 2449 "ksmbd_vfs_setxattr is failed(%d)\n", 2450 rc); 2451 break; 2452 } 2453 } 2454 2455 next: 2456 next = le32_to_cpu(eabuf->NextEntryOffset); 2457 if (next == 0 || buf_len < next) 2458 break; 2459 buf_len -= next; 2460 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2461 if (buf_len < sizeof(struct smb2_ea_info)) { 2462 rc = -EINVAL; 2463 break; 2464 } 2465 2466 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2467 le16_to_cpu(eabuf->EaValueLength)) { 2468 rc = -EINVAL; 2469 break; 2470 } 2471 } while (next != 0); 2472 2473 kfree(attr_name); 2474 return rc; 2475 } 2476 2477 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2478 struct ksmbd_file *fp, 2479 char *stream_name, int s_type) 2480 { 2481 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2482 size_t xattr_stream_size; 2483 char *xattr_stream_name; 2484 int rc; 2485 2486 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2487 &xattr_stream_name, 2488 &xattr_stream_size, 2489 s_type); 2490 if (rc) 2491 return rc; 2492 2493 fp->stream.name = xattr_stream_name; 2494 fp->stream.size = xattr_stream_size; 2495 2496 /* Check if there is stream prefix in xattr space */ 2497 rc = ksmbd_vfs_casexattr_len(idmap, 2498 path->dentry, 2499 xattr_stream_name, 2500 xattr_stream_size); 2501 if (rc >= 0) 2502 return 0; 2503 2504 if (fp->cdoption == FILE_OPEN_LE) { 2505 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2506 return -EBADF; 2507 } 2508 2509 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2510 if (rc < 0) 2511 pr_err("Failed to store XATTR stream name :%d\n", rc); 2512 return 0; 2513 } 2514 2515 static int smb2_remove_smb_xattrs(const struct path *path) 2516 { 2517 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2518 char *name, *xattr_list = NULL; 2519 ssize_t xattr_list_len; 2520 int err = 0; 2521 2522 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2523 if (xattr_list_len < 0) { 2524 goto out; 2525 } else if (!xattr_list_len) { 2526 ksmbd_debug(SMB, "empty xattr in the file\n"); 2527 goto out; 2528 } 2529 2530 for (name = xattr_list; name - xattr_list < xattr_list_len; 2531 name += strlen(name) + 1) { 2532 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2533 2534 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2535 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2536 STREAM_PREFIX_LEN)) { 2537 err = ksmbd_vfs_remove_xattr(idmap, path, 2538 name, true); 2539 if (err) 2540 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2541 name); 2542 } 2543 } 2544 out: 2545 kvfree(xattr_list); 2546 return err; 2547 } 2548 2549 static int smb2_create_truncate(const struct path *path) 2550 { 2551 int rc = vfs_truncate(path, 0); 2552 2553 if (rc) { 2554 pr_err("vfs_truncate failed, rc %d\n", rc); 2555 return rc; 2556 } 2557 2558 rc = smb2_remove_smb_xattrs(path); 2559 if (rc == -EOPNOTSUPP) 2560 rc = 0; 2561 if (rc) 2562 ksmbd_debug(SMB, 2563 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2564 rc); 2565 return rc; 2566 } 2567 2568 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2569 struct ksmbd_file *fp) 2570 { 2571 struct xattr_dos_attrib da = {0}; 2572 int rc; 2573 2574 if (!test_share_config_flag(tcon->share_conf, 2575 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2576 return; 2577 2578 da.version = 4; 2579 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2580 da.itime = da.create_time = fp->create_time; 2581 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2582 XATTR_DOSINFO_ITIME; 2583 2584 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); 2585 if (rc) 2586 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2587 } 2588 2589 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2590 const struct path *path, struct ksmbd_file *fp) 2591 { 2592 struct xattr_dos_attrib da; 2593 int rc; 2594 2595 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2596 2597 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2598 if (!test_share_config_flag(tcon->share_conf, 2599 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2600 return; 2601 2602 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2603 path->dentry, &da); 2604 if (rc > 0) { 2605 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2606 fp->create_time = da.create_time; 2607 fp->itime = da.itime; 2608 } 2609 } 2610 2611 static int smb2_creat(struct ksmbd_work *work, 2612 struct path *path, char *name, int open_flags, 2613 umode_t posix_mode, bool is_dir) 2614 { 2615 struct ksmbd_tree_connect *tcon = work->tcon; 2616 struct ksmbd_share_config *share = tcon->share_conf; 2617 umode_t mode; 2618 int rc; 2619 2620 if (!(open_flags & O_CREAT)) 2621 return -EBADF; 2622 2623 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2624 if (is_dir == true) { 2625 ksmbd_debug(SMB, "creating directory\n"); 2626 2627 mode = share_config_directory_mode(share, posix_mode); 2628 rc = ksmbd_vfs_mkdir(work, name, mode); 2629 if (rc) 2630 return rc; 2631 } else { 2632 ksmbd_debug(SMB, "creating regular file\n"); 2633 2634 mode = share_config_create_mode(share, posix_mode); 2635 rc = ksmbd_vfs_create(work, name, mode); 2636 if (rc) 2637 return rc; 2638 } 2639 2640 rc = ksmbd_vfs_kern_path(work, name, 0, path, 0); 2641 if (rc) { 2642 pr_err("cannot get linux path (%s), err = %d\n", 2643 name, rc); 2644 return rc; 2645 } 2646 return 0; 2647 } 2648 2649 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2650 struct smb2_create_req *req, 2651 const struct path *path) 2652 { 2653 struct create_context *context; 2654 struct create_sd_buf_req *sd_buf; 2655 2656 if (!req->CreateContextsOffset) 2657 return -ENOENT; 2658 2659 /* Parse SD BUFFER create contexts */ 2660 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2661 if (!context) 2662 return -ENOENT; 2663 else if (IS_ERR(context)) 2664 return PTR_ERR(context); 2665 2666 ksmbd_debug(SMB, 2667 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2668 sd_buf = (struct create_sd_buf_req *)context; 2669 if (le16_to_cpu(context->DataOffset) + 2670 le32_to_cpu(context->DataLength) < 2671 sizeof(struct create_sd_buf_req)) 2672 return -EINVAL; 2673 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2674 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2675 } 2676 2677 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2678 struct mnt_idmap *idmap, 2679 struct inode *inode) 2680 { 2681 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2682 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2683 2684 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2685 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2686 fattr->cf_mode = inode->i_mode; 2687 fattr->cf_acls = NULL; 2688 fattr->cf_dacls = NULL; 2689 2690 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2691 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2692 if (S_ISDIR(inode->i_mode)) 2693 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2694 } 2695 } 2696 2697 enum { 2698 DURABLE_RECONN_V2 = 1, 2699 DURABLE_RECONN, 2700 DURABLE_REQ_V2, 2701 DURABLE_REQ, 2702 }; 2703 2704 struct durable_info { 2705 struct ksmbd_file *fp; 2706 unsigned short int type; 2707 bool persistent; 2708 bool reconnected; 2709 unsigned int timeout; 2710 char *CreateGuid; 2711 }; 2712 2713 static int parse_durable_handle_context(struct ksmbd_work *work, 2714 struct smb2_create_req *req, 2715 struct lease_ctx_info *lc, 2716 struct durable_info *dh_info) 2717 { 2718 struct ksmbd_conn *conn = work->conn; 2719 struct create_context *context; 2720 int dh_idx, err = 0; 2721 u64 persistent_id = 0; 2722 int req_op_level; 2723 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; 2724 2725 req_op_level = req->RequestedOplockLevel; 2726 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); 2727 dh_idx++) { 2728 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); 2729 if (IS_ERR(context)) { 2730 err = PTR_ERR(context); 2731 goto out; 2732 } 2733 if (!context) 2734 continue; 2735 2736 switch (dh_idx) { 2737 case DURABLE_RECONN_V2: 2738 { 2739 struct create_durable_handle_reconnect_v2 *recon_v2; 2740 2741 if (dh_info->type == DURABLE_RECONN || 2742 dh_info->type == DURABLE_REQ_V2) { 2743 err = -EINVAL; 2744 goto out; 2745 } 2746 2747 if (le16_to_cpu(context->DataOffset) + 2748 le32_to_cpu(context->DataLength) < 2749 sizeof(struct create_durable_handle_reconnect_v2)) { 2750 err = -EINVAL; 2751 goto out; 2752 } 2753 2754 recon_v2 = (struct create_durable_handle_reconnect_v2 *)context; 2755 persistent_id = recon_v2->dcontext.Fid.PersistentFileId; 2756 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2757 if (!dh_info->fp) { 2758 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2759 err = -EBADF; 2760 goto out; 2761 } 2762 2763 if (memcmp(dh_info->fp->create_guid, recon_v2->dcontext.CreateGuid, 2764 SMB2_CREATE_GUID_SIZE)) { 2765 err = -EBADF; 2766 ksmbd_put_durable_fd(dh_info->fp); 2767 goto out; 2768 } 2769 2770 dh_info->type = dh_idx; 2771 dh_info->reconnected = true; 2772 ksmbd_debug(SMB, 2773 "reconnect v2 Persistent-id from reconnect = %llu\n", 2774 persistent_id); 2775 break; 2776 } 2777 case DURABLE_RECONN: 2778 { 2779 create_durable_reconn_t *recon; 2780 2781 if (dh_info->type == DURABLE_RECONN_V2 || 2782 dh_info->type == DURABLE_REQ_V2) { 2783 err = -EINVAL; 2784 goto out; 2785 } 2786 2787 if (le16_to_cpu(context->DataOffset) + 2788 le32_to_cpu(context->DataLength) < 2789 sizeof(create_durable_reconn_t)) { 2790 err = -EINVAL; 2791 goto out; 2792 } 2793 2794 recon = (create_durable_reconn_t *)context; 2795 persistent_id = recon->Data.Fid.PersistentFileId; 2796 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2797 if (!dh_info->fp) { 2798 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2799 err = -EBADF; 2800 goto out; 2801 } 2802 2803 dh_info->type = dh_idx; 2804 dh_info->reconnected = true; 2805 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", 2806 persistent_id); 2807 break; 2808 } 2809 case DURABLE_REQ_V2: 2810 { 2811 struct create_durable_req_v2 *durable_v2_blob; 2812 2813 if (dh_info->type == DURABLE_RECONN || 2814 dh_info->type == DURABLE_RECONN_V2) { 2815 err = -EINVAL; 2816 goto out; 2817 } 2818 2819 if (le16_to_cpu(context->DataOffset) + 2820 le32_to_cpu(context->DataLength) < 2821 sizeof(struct create_durable_req_v2)) { 2822 err = -EINVAL; 2823 goto out; 2824 } 2825 2826 durable_v2_blob = 2827 (struct create_durable_req_v2 *)context; 2828 ksmbd_debug(SMB, "Request for durable v2 open\n"); 2829 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->dcontext.CreateGuid); 2830 if (dh_info->fp) { 2831 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, 2832 SMB2_CLIENT_GUID_SIZE)) { 2833 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { 2834 err = -ENOEXEC; 2835 ksmbd_put_durable_fd(dh_info->fp); 2836 goto out; 2837 } 2838 2839 if (dh_info->fp->conn) { 2840 ksmbd_put_durable_fd(dh_info->fp); 2841 err = -EBADF; 2842 goto out; 2843 } 2844 dh_info->reconnected = true; 2845 goto out; 2846 } 2847 } 2848 2849 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2850 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2851 dh_info->CreateGuid = 2852 durable_v2_blob->dcontext.CreateGuid; 2853 dh_info->persistent = 2854 le32_to_cpu(durable_v2_blob->dcontext.Flags); 2855 dh_info->timeout = 2856 le32_to_cpu(durable_v2_blob->dcontext.Timeout); 2857 dh_info->type = dh_idx; 2858 } 2859 break; 2860 } 2861 case DURABLE_REQ: 2862 if (dh_info->type == DURABLE_RECONN) 2863 goto out; 2864 if (dh_info->type == DURABLE_RECONN_V2 || 2865 dh_info->type == DURABLE_REQ_V2) { 2866 err = -EINVAL; 2867 goto out; 2868 } 2869 2870 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2871 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2872 ksmbd_debug(SMB, "Request for durable open\n"); 2873 dh_info->type = dh_idx; 2874 } 2875 } 2876 } 2877 2878 out: 2879 return err; 2880 } 2881 2882 /** 2883 * smb2_open() - handler for smb file open request 2884 * @work: smb work containing request buffer 2885 * 2886 * Return: 0 on success, otherwise error 2887 */ 2888 int smb2_open(struct ksmbd_work *work) 2889 { 2890 struct ksmbd_conn *conn = work->conn; 2891 struct ksmbd_session *sess = work->sess; 2892 struct ksmbd_tree_connect *tcon = work->tcon; 2893 struct smb2_create_req *req; 2894 struct smb2_create_rsp *rsp; 2895 struct path path; 2896 struct ksmbd_share_config *share = tcon->share_conf; 2897 struct ksmbd_file *fp = NULL; 2898 struct file *filp = NULL; 2899 struct mnt_idmap *idmap = NULL; 2900 struct kstat stat; 2901 struct create_context *context; 2902 struct lease_ctx_info *lc = NULL; 2903 struct create_ea_buf_req *ea_buf = NULL; 2904 struct oplock_info *opinfo; 2905 struct durable_info dh_info = {0}; 2906 __le32 *next_ptr = NULL; 2907 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2908 int rc = 0; 2909 int contxt_cnt = 0, query_disk_id = 0; 2910 bool maximal_access_ctxt = false, posix_ctxt = false; 2911 int s_type = 0; 2912 int next_off = 0; 2913 char *name = NULL; 2914 char *stream_name = NULL; 2915 bool file_present = false, created = false, already_permitted = false; 2916 int share_ret, need_truncate = 0; 2917 u64 time; 2918 umode_t posix_mode = 0; 2919 __le32 daccess, maximal_access = 0; 2920 int iov_len = 0; 2921 2922 ksmbd_debug(SMB, "Received smb2 create request\n"); 2923 2924 WORK_BUFFERS(work, req, rsp); 2925 2926 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2927 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2928 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2929 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2930 smb2_set_err_rsp(work); 2931 return -EINVAL; 2932 } 2933 2934 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2935 ksmbd_debug(SMB, "IPC pipe create request\n"); 2936 return create_smb2_pipe(work); 2937 } 2938 2939 if (req->CreateContextsOffset && tcon->posix_extensions) { 2940 context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); 2941 if (IS_ERR(context)) { 2942 rc = PTR_ERR(context); 2943 goto err_out2; 2944 } else if (context) { 2945 struct create_posix *posix = (struct create_posix *)context; 2946 2947 if (le16_to_cpu(context->DataOffset) + 2948 le32_to_cpu(context->DataLength) < 2949 sizeof(struct create_posix) - 4) { 2950 rc = -EINVAL; 2951 goto err_out2; 2952 } 2953 ksmbd_debug(SMB, "get posix context\n"); 2954 2955 posix_mode = le32_to_cpu(posix->Mode); 2956 posix_ctxt = true; 2957 } 2958 } 2959 2960 if (req->NameLength) { 2961 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), 2962 le16_to_cpu(req->NameLength), 2963 work->conn->local_nls); 2964 if (IS_ERR(name)) { 2965 rc = PTR_ERR(name); 2966 name = NULL; 2967 goto err_out2; 2968 } 2969 2970 ksmbd_debug(SMB, "converted name = %s\n", name); 2971 2972 if (posix_ctxt == false) { 2973 if (strchr(name, ':')) { 2974 if (!test_share_config_flag(work->tcon->share_conf, 2975 KSMBD_SHARE_FLAG_STREAMS)) { 2976 rc = -EBADF; 2977 goto err_out2; 2978 } 2979 rc = parse_stream_name(name, &stream_name, &s_type); 2980 if (rc < 0) 2981 goto err_out2; 2982 } 2983 2984 rc = ksmbd_validate_filename(name); 2985 if (rc < 0) 2986 goto err_out2; 2987 } 2988 2989 if (ksmbd_share_veto_filename(share, name)) { 2990 rc = -ENOENT; 2991 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2992 name); 2993 goto err_out2; 2994 } 2995 } else { 2996 name = kstrdup("", KSMBD_DEFAULT_GFP); 2997 if (!name) { 2998 rc = -ENOMEM; 2999 goto err_out2; 3000 } 3001 } 3002 3003 req_op_level = req->RequestedOplockLevel; 3004 3005 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && 3006 req->CreateContextsOffset) { 3007 lc = parse_lease_state(req); 3008 rc = parse_durable_handle_context(work, req, lc, &dh_info); 3009 if (rc) { 3010 ksmbd_debug(SMB, "error parsing durable handle context\n"); 3011 goto err_out2; 3012 } 3013 3014 if (dh_info.reconnected == true) { 3015 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, 3016 lc, sess->user, name); 3017 if (rc) { 3018 ksmbd_put_durable_fd(dh_info.fp); 3019 goto err_out2; 3020 } 3021 3022 rc = ksmbd_reopen_durable_fd(work, dh_info.fp); 3023 if (rc) { 3024 ksmbd_put_durable_fd(dh_info.fp); 3025 goto err_out2; 3026 } 3027 3028 fp = dh_info.fp; 3029 3030 if (ksmbd_override_fsids(work)) { 3031 rc = -ENOMEM; 3032 ksmbd_put_durable_fd(dh_info.fp); 3033 goto err_out2; 3034 } 3035 3036 file_info = FILE_OPENED; 3037 3038 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); 3039 ksmbd_put_durable_fd(fp); 3040 if (rc) 3041 goto err_out2; 3042 3043 goto reconnected_fp; 3044 } 3045 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 3046 lc = parse_lease_state(req); 3047 3048 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 3049 pr_err("Invalid impersonationlevel : 0x%x\n", 3050 le32_to_cpu(req->ImpersonationLevel)); 3051 rc = -EIO; 3052 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 3053 goto err_out2; 3054 } 3055 3056 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 3057 pr_err("Invalid create options : 0x%x\n", 3058 le32_to_cpu(req->CreateOptions)); 3059 rc = -EINVAL; 3060 goto err_out2; 3061 } else { 3062 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 3063 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 3064 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 3065 3066 if (req->CreateOptions & 3067 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 3068 FILE_RESERVE_OPFILTER_LE)) { 3069 rc = -EOPNOTSUPP; 3070 goto err_out2; 3071 } 3072 3073 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3074 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 3075 rc = -EINVAL; 3076 goto err_out2; 3077 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 3078 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 3079 } 3080 } 3081 } 3082 3083 if (le32_to_cpu(req->CreateDisposition) > 3084 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 3085 pr_err("Invalid create disposition : 0x%x\n", 3086 le32_to_cpu(req->CreateDisposition)); 3087 rc = -EINVAL; 3088 goto err_out2; 3089 } 3090 3091 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 3092 pr_err("Invalid desired access : 0x%x\n", 3093 le32_to_cpu(req->DesiredAccess)); 3094 rc = -EACCES; 3095 goto err_out2; 3096 } 3097 3098 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 3099 pr_err("Invalid file attribute : 0x%x\n", 3100 le32_to_cpu(req->FileAttributes)); 3101 rc = -EINVAL; 3102 goto err_out2; 3103 } 3104 3105 if (req->CreateContextsOffset) { 3106 /* Parse non-durable handle create contexts */ 3107 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 3108 if (IS_ERR(context)) { 3109 rc = PTR_ERR(context); 3110 goto err_out2; 3111 } else if (context) { 3112 ea_buf = (struct create_ea_buf_req *)context; 3113 if (le16_to_cpu(context->DataOffset) + 3114 le32_to_cpu(context->DataLength) < 3115 sizeof(struct create_ea_buf_req)) { 3116 rc = -EINVAL; 3117 goto err_out2; 3118 } 3119 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 3120 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3121 rc = -EACCES; 3122 goto err_out2; 3123 } 3124 } 3125 3126 context = smb2_find_context_vals(req, 3127 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 3128 if (IS_ERR(context)) { 3129 rc = PTR_ERR(context); 3130 goto err_out2; 3131 } else if (context) { 3132 ksmbd_debug(SMB, 3133 "get query maximal access context\n"); 3134 maximal_access_ctxt = 1; 3135 } 3136 3137 context = smb2_find_context_vals(req, 3138 SMB2_CREATE_TIMEWARP_REQUEST, 4); 3139 if (IS_ERR(context)) { 3140 rc = PTR_ERR(context); 3141 goto err_out2; 3142 } else if (context) { 3143 ksmbd_debug(SMB, "get timewarp context\n"); 3144 rc = -EBADF; 3145 goto err_out2; 3146 } 3147 } 3148 3149 if (ksmbd_override_fsids(work)) { 3150 rc = -ENOMEM; 3151 goto err_out2; 3152 } 3153 3154 rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, 3155 &path, 1); 3156 if (!rc) { 3157 file_present = true; 3158 3159 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 3160 /* 3161 * If file exists with under flags, return access 3162 * denied error. 3163 */ 3164 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 3165 req->CreateDisposition == FILE_OPEN_IF_LE) { 3166 rc = -EACCES; 3167 goto err_out; 3168 } 3169 3170 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3171 ksmbd_debug(SMB, 3172 "User does not have write permission\n"); 3173 rc = -EACCES; 3174 goto err_out; 3175 } 3176 } else if (d_is_symlink(path.dentry)) { 3177 rc = -EACCES; 3178 goto err_out; 3179 } 3180 3181 idmap = mnt_idmap(path.mnt); 3182 } else { 3183 if (rc != -ENOENT) 3184 goto err_out; 3185 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 3186 name, rc); 3187 rc = 0; 3188 } 3189 3190 if (stream_name) { 3191 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3192 if (s_type == DATA_STREAM) { 3193 rc = -EIO; 3194 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3195 } 3196 } else { 3197 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 3198 s_type == DATA_STREAM) { 3199 rc = -EIO; 3200 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3201 } 3202 } 3203 3204 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 3205 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 3206 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3207 rc = -EIO; 3208 } 3209 3210 if (rc < 0) 3211 goto err_out; 3212 } 3213 3214 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 3215 S_ISDIR(d_inode(path.dentry)->i_mode) && 3216 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3217 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 3218 name, req->CreateOptions); 3219 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3220 rc = -EIO; 3221 goto err_out; 3222 } 3223 3224 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 3225 !(req->CreateDisposition == FILE_CREATE_LE) && 3226 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 3227 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3228 rc = -EIO; 3229 goto err_out; 3230 } 3231 3232 if (!stream_name && file_present && 3233 req->CreateDisposition == FILE_CREATE_LE) { 3234 rc = -EEXIST; 3235 goto err_out; 3236 } 3237 3238 daccess = smb_map_generic_desired_access(req->DesiredAccess); 3239 3240 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3241 rc = smb_check_perm_dacl(conn, &path, &daccess, 3242 sess->user->uid); 3243 if (rc) 3244 goto err_out; 3245 } 3246 3247 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 3248 if (!file_present) { 3249 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 3250 } else { 3251 ksmbd_vfs_query_maximal_access(idmap, 3252 path.dentry, 3253 &daccess); 3254 already_permitted = true; 3255 } 3256 maximal_access = daccess; 3257 } 3258 3259 open_flags = smb2_create_open_flags(file_present, daccess, 3260 req->CreateDisposition, 3261 &may_flags, 3262 req->CreateOptions, 3263 file_present ? d_inode(path.dentry)->i_mode : 0); 3264 3265 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3266 if (open_flags & (O_CREAT | O_TRUNC)) { 3267 ksmbd_debug(SMB, 3268 "User does not have write permission\n"); 3269 rc = -EACCES; 3270 goto err_out; 3271 } 3272 } 3273 3274 /*create file if not present */ 3275 if (!file_present) { 3276 rc = smb2_creat(work, &path, name, open_flags, 3277 posix_mode, 3278 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 3279 if (rc) { 3280 if (rc == -ENOENT) { 3281 rc = -EIO; 3282 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 3283 } 3284 goto err_out; 3285 } 3286 3287 created = true; 3288 idmap = mnt_idmap(path.mnt); 3289 if (ea_buf) { 3290 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3291 sizeof(struct smb2_ea_info)) { 3292 rc = -EINVAL; 3293 goto err_out; 3294 } 3295 3296 rc = smb2_set_ea(&ea_buf->ea, 3297 le32_to_cpu(ea_buf->ccontext.DataLength), 3298 &path, false); 3299 if (rc == -EOPNOTSUPP) 3300 rc = 0; 3301 else if (rc) 3302 goto err_out; 3303 } 3304 } else if (!already_permitted) { 3305 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3306 * because execute(search) permission on a parent directory, 3307 * is already granted. 3308 */ 3309 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3310 rc = inode_permission(idmap, 3311 d_inode(path.dentry), 3312 may_flags); 3313 if (rc) 3314 goto err_out; 3315 3316 if ((daccess & FILE_DELETE_LE) || 3317 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3318 rc = inode_permission(idmap, 3319 d_inode(path.dentry->d_parent), 3320 MAY_EXEC | MAY_WRITE); 3321 if (rc) 3322 goto err_out; 3323 } 3324 } 3325 } 3326 3327 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3328 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3329 rc = -EBUSY; 3330 goto err_out; 3331 } 3332 3333 rc = 0; 3334 filp = dentry_open(&path, open_flags, current_cred()); 3335 if (IS_ERR(filp)) { 3336 rc = PTR_ERR(filp); 3337 pr_err("dentry open for dir failed, rc %d\n", rc); 3338 goto err_out; 3339 } 3340 3341 if (file_present) { 3342 if (!(open_flags & O_TRUNC)) 3343 file_info = FILE_OPENED; 3344 else 3345 file_info = FILE_OVERWRITTEN; 3346 3347 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3348 FILE_SUPERSEDE_LE) 3349 file_info = FILE_SUPERSEDED; 3350 } else if (open_flags & O_CREAT) { 3351 file_info = FILE_CREATED; 3352 } 3353 3354 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3355 3356 /* Obtain Volatile-ID */ 3357 fp = ksmbd_open_fd(work, filp); 3358 if (IS_ERR(fp)) { 3359 fput(filp); 3360 rc = PTR_ERR(fp); 3361 fp = NULL; 3362 goto err_out; 3363 } 3364 3365 /* Get Persistent-ID */ 3366 ksmbd_open_durable_fd(fp); 3367 if (!has_file_id(fp->persistent_id)) { 3368 rc = -ENOMEM; 3369 goto err_out; 3370 } 3371 3372 fp->cdoption = req->CreateDisposition; 3373 fp->daccess = daccess; 3374 fp->saccess = req->ShareAccess; 3375 fp->coption = req->CreateOptions; 3376 3377 /* Set default windows and posix acls if creating new file */ 3378 if (created) { 3379 int posix_acl_rc; 3380 struct inode *inode = d_inode(path.dentry); 3381 3382 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3383 &path, 3384 d_inode(path.dentry->d_parent)); 3385 if (posix_acl_rc) 3386 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3387 3388 if (test_share_config_flag(work->tcon->share_conf, 3389 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3390 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3391 sess->user->gid); 3392 } 3393 3394 if (rc) { 3395 rc = smb2_create_sd_buffer(work, req, &path); 3396 if (rc) { 3397 if (posix_acl_rc) 3398 ksmbd_vfs_set_init_posix_acl(idmap, 3399 &path); 3400 3401 if (test_share_config_flag(work->tcon->share_conf, 3402 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3403 struct smb_fattr fattr; 3404 struct smb_ntsd *pntsd; 3405 int pntsd_size; 3406 size_t scratch_len; 3407 3408 ksmbd_acls_fattr(&fattr, idmap, inode); 3409 scratch_len = smb_acl_sec_desc_scratch_len(&fattr, 3410 NULL, 0, 3411 OWNER_SECINFO | GROUP_SECINFO | 3412 DACL_SECINFO); 3413 if (!scratch_len || scratch_len == SIZE_MAX) { 3414 rc = -EFBIG; 3415 posix_acl_release(fattr.cf_acls); 3416 posix_acl_release(fattr.cf_dacls); 3417 goto err_out; 3418 } 3419 3420 pntsd = kvzalloc(scratch_len, KSMBD_DEFAULT_GFP); 3421 if (!pntsd) { 3422 rc = -ENOMEM; 3423 posix_acl_release(fattr.cf_acls); 3424 posix_acl_release(fattr.cf_dacls); 3425 goto err_out; 3426 } 3427 3428 rc = build_sec_desc(idmap, 3429 pntsd, NULL, 0, 3430 OWNER_SECINFO | 3431 GROUP_SECINFO | 3432 DACL_SECINFO, 3433 &pntsd_size, &fattr); 3434 posix_acl_release(fattr.cf_acls); 3435 posix_acl_release(fattr.cf_dacls); 3436 if (rc) { 3437 kvfree(pntsd); 3438 goto err_out; 3439 } 3440 3441 rc = ksmbd_vfs_set_sd_xattr(conn, 3442 idmap, 3443 &path, 3444 pntsd, 3445 pntsd_size, 3446 false); 3447 kvfree(pntsd); 3448 if (rc) 3449 pr_err("failed to store ntacl in xattr : %d\n", 3450 rc); 3451 } 3452 } 3453 } 3454 rc = 0; 3455 } 3456 3457 if (stream_name) { 3458 rc = smb2_set_stream_name_xattr(&path, 3459 fp, 3460 stream_name, 3461 s_type); 3462 if (rc) 3463 goto err_out; 3464 file_info = FILE_CREATED; 3465 } 3466 3467 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3468 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3469 3470 fp->is_posix_ctxt = posix_ctxt; 3471 3472 /* fp should be searchable through ksmbd_inode.m_fp_list 3473 * after daccess, saccess, attrib_only, and stream are 3474 * initialized. 3475 */ 3476 down_write(&fp->f_ci->m_lock); 3477 list_add(&fp->node, &fp->f_ci->m_fp_list); 3478 up_write(&fp->f_ci->m_lock); 3479 3480 /* Check delete pending among previous fp before oplock break */ 3481 if (ksmbd_inode_pending_delete(fp)) { 3482 rc = -EBUSY; 3483 goto err_out; 3484 } 3485 3486 if (file_present || created) 3487 path_put(&path); 3488 3489 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3490 !fp->attrib_only && !stream_name) { 3491 smb_break_all_oplock(work, fp); 3492 need_truncate = 1; 3493 } 3494 3495 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3496 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3497 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3498 !(conn->vals->req_capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3499 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3500 rc = share_ret; 3501 goto err_out1; 3502 } 3503 } else { 3504 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { 3505 if (S_ISDIR(file_inode(filp)->i_mode)) { 3506 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; 3507 lc->is_dir = true; 3508 } 3509 3510 /* 3511 * Compare parent lease using parent key. If there is no 3512 * a lease that has same parent key, Send lease break 3513 * notification. 3514 */ 3515 smb_send_parent_lease_break_noti(fp, lc); 3516 3517 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3518 ksmbd_debug(SMB, 3519 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3520 name, req_op_level, lc->req_state); 3521 rc = find_same_lease_key(sess, fp->f_ci, lc); 3522 if (rc) 3523 goto err_out1; 3524 } else if (open_flags == O_RDONLY && 3525 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3526 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3527 req_op_level = SMB2_OPLOCK_LEVEL_II; 3528 3529 rc = smb_grant_oplock(work, req_op_level, 3530 fp->persistent_id, fp, 3531 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3532 lc, share_ret); 3533 if (rc < 0) 3534 goto err_out1; 3535 } 3536 3537 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3538 ksmbd_fd_set_delete_on_close(fp, file_info); 3539 3540 if (need_truncate) { 3541 rc = smb2_create_truncate(&fp->filp->f_path); 3542 if (rc) 3543 goto err_out1; 3544 } 3545 3546 if (req->CreateContextsOffset) { 3547 struct create_alloc_size_req *az_req; 3548 3549 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3550 SMB2_CREATE_ALLOCATION_SIZE, 4); 3551 if (IS_ERR(az_req)) { 3552 rc = PTR_ERR(az_req); 3553 goto err_out1; 3554 } else if (az_req) { 3555 loff_t alloc_size; 3556 int err; 3557 3558 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3559 le32_to_cpu(az_req->ccontext.DataLength) < 3560 sizeof(struct create_alloc_size_req)) { 3561 rc = -EINVAL; 3562 goto err_out1; 3563 } 3564 alloc_size = le64_to_cpu(az_req->AllocationSize); 3565 ksmbd_debug(SMB, 3566 "request smb2 create allocate size : %llu\n", 3567 alloc_size); 3568 smb_break_all_levII_oplock(work, fp, 1); 3569 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3570 alloc_size); 3571 if (err < 0) 3572 ksmbd_debug(SMB, 3573 "vfs_fallocate is failed : %d\n", 3574 err); 3575 } 3576 3577 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3578 if (IS_ERR(context)) { 3579 rc = PTR_ERR(context); 3580 goto err_out1; 3581 } else if (context) { 3582 ksmbd_debug(SMB, "get query on disk id context\n"); 3583 query_disk_id = 1; 3584 } 3585 3586 if (conn->is_aapl == false) { 3587 context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); 3588 if (IS_ERR(context)) { 3589 rc = PTR_ERR(context); 3590 goto err_out1; 3591 } else if (context) 3592 conn->is_aapl = true; 3593 } 3594 } 3595 3596 rc = ksmbd_vfs_getattr(&path, &stat); 3597 if (rc) 3598 goto err_out1; 3599 3600 if (stat.result_mask & STATX_BTIME) 3601 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3602 else 3603 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3604 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3605 fp->f_ci->m_fattr = 3606 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3607 3608 if (!created) 3609 smb2_update_xattrs(tcon, &path, fp); 3610 else 3611 smb2_new_xattrs(tcon, &path, fp); 3612 3613 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3614 3615 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { 3616 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && 3617 test_share_config_flag(work->tcon->share_conf, 3618 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 3619 fp->is_persistent = true; 3620 else 3621 fp->is_durable = true; 3622 3623 if (dh_info.type == DURABLE_REQ_V2) { 3624 memcpy(fp->create_guid, dh_info.CreateGuid, 3625 SMB2_CREATE_GUID_SIZE); 3626 if (dh_info.timeout) 3627 fp->durable_timeout = 3628 min_t(unsigned int, dh_info.timeout, 3629 DURABLE_HANDLE_MAX_TIMEOUT); 3630 else 3631 fp->durable_timeout = 60; 3632 } 3633 } 3634 3635 reconnected_fp: 3636 rsp->StructureSize = cpu_to_le16(89); 3637 opinfo = opinfo_get(fp); 3638 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3639 rsp->Flags = 0; 3640 rsp->CreateAction = cpu_to_le32(file_info); 3641 rsp->CreationTime = cpu_to_le64(fp->create_time); 3642 time = ksmbd_UnixTimeToNT(stat.atime); 3643 rsp->LastAccessTime = cpu_to_le64(time); 3644 time = ksmbd_UnixTimeToNT(stat.mtime); 3645 rsp->LastWriteTime = cpu_to_le64(time); 3646 time = ksmbd_UnixTimeToNT(stat.ctime); 3647 rsp->ChangeTime = cpu_to_le64(time); 3648 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3649 cpu_to_le64(stat.blocks << 9); 3650 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3651 rsp->FileAttributes = fp->f_ci->m_fattr; 3652 3653 rsp->Reserved2 = 0; 3654 3655 rsp->PersistentFileId = fp->persistent_id; 3656 rsp->VolatileFileId = fp->volatile_id; 3657 3658 rsp->CreateContextsOffset = 0; 3659 rsp->CreateContextsLength = 0; 3660 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3661 3662 /* If lease is request send lease context response */ 3663 if (opinfo && opinfo->is_lease) { 3664 struct create_context *lease_ccontext; 3665 3666 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3667 name, opinfo->o_lease->state); 3668 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3669 3670 lease_ccontext = (struct create_context *)rsp->Buffer; 3671 contxt_cnt++; 3672 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3673 le32_add_cpu(&rsp->CreateContextsLength, 3674 conn->vals->create_lease_size); 3675 iov_len += conn->vals->create_lease_size; 3676 next_ptr = &lease_ccontext->Next; 3677 next_off = conn->vals->create_lease_size; 3678 } 3679 opinfo_put(opinfo); 3680 3681 if (maximal_access_ctxt) { 3682 struct create_context *mxac_ccontext; 3683 3684 if (maximal_access == 0) 3685 ksmbd_vfs_query_maximal_access(idmap, 3686 path.dentry, 3687 &maximal_access); 3688 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3689 le32_to_cpu(rsp->CreateContextsLength)); 3690 contxt_cnt++; 3691 create_mxac_rsp_buf(rsp->Buffer + 3692 le32_to_cpu(rsp->CreateContextsLength), 3693 le32_to_cpu(maximal_access)); 3694 le32_add_cpu(&rsp->CreateContextsLength, 3695 conn->vals->create_mxac_size); 3696 iov_len += conn->vals->create_mxac_size; 3697 if (next_ptr) 3698 *next_ptr = cpu_to_le32(next_off); 3699 next_ptr = &mxac_ccontext->Next; 3700 next_off = conn->vals->create_mxac_size; 3701 } 3702 3703 if (query_disk_id) { 3704 struct create_context *disk_id_ccontext; 3705 3706 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3707 le32_to_cpu(rsp->CreateContextsLength)); 3708 contxt_cnt++; 3709 create_disk_id_rsp_buf(rsp->Buffer + 3710 le32_to_cpu(rsp->CreateContextsLength), 3711 stat.ino, tcon->id); 3712 le32_add_cpu(&rsp->CreateContextsLength, 3713 conn->vals->create_disk_id_size); 3714 iov_len += conn->vals->create_disk_id_size; 3715 if (next_ptr) 3716 *next_ptr = cpu_to_le32(next_off); 3717 next_ptr = &disk_id_ccontext->Next; 3718 next_off = conn->vals->create_disk_id_size; 3719 } 3720 3721 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { 3722 struct create_context *durable_ccontext; 3723 3724 durable_ccontext = (struct create_context *)(rsp->Buffer + 3725 le32_to_cpu(rsp->CreateContextsLength)); 3726 contxt_cnt++; 3727 if (dh_info.type == DURABLE_REQ) { 3728 create_durable_rsp_buf(rsp->Buffer + 3729 le32_to_cpu(rsp->CreateContextsLength)); 3730 le32_add_cpu(&rsp->CreateContextsLength, 3731 conn->vals->create_durable_size); 3732 iov_len += conn->vals->create_durable_size; 3733 } else { 3734 create_durable_v2_rsp_buf(rsp->Buffer + 3735 le32_to_cpu(rsp->CreateContextsLength), 3736 fp); 3737 le32_add_cpu(&rsp->CreateContextsLength, 3738 conn->vals->create_durable_v2_size); 3739 iov_len += conn->vals->create_durable_v2_size; 3740 } 3741 3742 if (next_ptr) 3743 *next_ptr = cpu_to_le32(next_off); 3744 next_ptr = &durable_ccontext->Next; 3745 next_off = conn->vals->create_durable_size; 3746 } 3747 3748 if (posix_ctxt) { 3749 contxt_cnt++; 3750 create_posix_rsp_buf(rsp->Buffer + 3751 le32_to_cpu(rsp->CreateContextsLength), 3752 fp); 3753 le32_add_cpu(&rsp->CreateContextsLength, 3754 conn->vals->create_posix_size); 3755 iov_len += conn->vals->create_posix_size; 3756 if (next_ptr) 3757 *next_ptr = cpu_to_le32(next_off); 3758 } 3759 3760 if (contxt_cnt > 0) { 3761 rsp->CreateContextsOffset = 3762 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3763 } 3764 3765 err_out: 3766 if (rc && (file_present || created)) 3767 path_put(&path); 3768 3769 err_out1: 3770 ksmbd_revert_fsids(work); 3771 3772 err_out2: 3773 if (!rc) { 3774 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3775 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3776 } 3777 if (rc) { 3778 if (rc == -EINVAL) 3779 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3780 else if (rc == -EOPNOTSUPP) 3781 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3782 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3783 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3784 else if (rc == -ENOENT) 3785 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3786 else if (rc == -EPERM) 3787 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3788 else if (rc == -EBUSY) 3789 rsp->hdr.Status = STATUS_DELETE_PENDING; 3790 else if (rc == -EBADF) 3791 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3792 else if (rc == -ENOEXEC) 3793 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3794 else if (rc == -ENXIO) 3795 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3796 else if (rc == -EEXIST) 3797 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3798 else if (rc == -EMFILE) 3799 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3800 if (!rsp->hdr.Status) 3801 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3802 3803 if (fp) 3804 ksmbd_fd_put(work, fp); 3805 smb2_set_err_rsp(work); 3806 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3807 } 3808 3809 kfree(name); 3810 kfree(lc); 3811 3812 return rc; 3813 } 3814 3815 static int readdir_info_level_struct_sz(int info_level) 3816 { 3817 switch (info_level) { 3818 case FILE_FULL_DIRECTORY_INFORMATION: 3819 return sizeof(FILE_FULL_DIRECTORY_INFO); 3820 case FILE_BOTH_DIRECTORY_INFORMATION: 3821 return sizeof(FILE_BOTH_DIRECTORY_INFO); 3822 case FILE_DIRECTORY_INFORMATION: 3823 return sizeof(FILE_DIRECTORY_INFO); 3824 case FILE_NAMES_INFORMATION: 3825 return sizeof(struct file_names_info); 3826 case FILEID_FULL_DIRECTORY_INFORMATION: 3827 return sizeof(FILE_ID_FULL_DIR_INFO); 3828 case FILEID_BOTH_DIRECTORY_INFORMATION: 3829 return sizeof(struct file_id_both_directory_info); 3830 case SMB_FIND_FILE_POSIX_INFO: 3831 return sizeof(struct smb2_posix_info); 3832 default: 3833 return -EOPNOTSUPP; 3834 } 3835 } 3836 3837 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3838 { 3839 switch (info_level) { 3840 case FILE_FULL_DIRECTORY_INFORMATION: 3841 { 3842 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3843 3844 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->rptr; 3845 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3846 d_info->name = ffdinfo->FileName; 3847 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3848 return 0; 3849 } 3850 case FILE_BOTH_DIRECTORY_INFORMATION: 3851 { 3852 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3853 3854 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->rptr; 3855 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3856 d_info->name = fbdinfo->FileName; 3857 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3858 return 0; 3859 } 3860 case FILE_DIRECTORY_INFORMATION: 3861 { 3862 FILE_DIRECTORY_INFO *fdinfo; 3863 3864 fdinfo = (FILE_DIRECTORY_INFO *)d_info->rptr; 3865 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3866 d_info->name = fdinfo->FileName; 3867 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3868 return 0; 3869 } 3870 case FILE_NAMES_INFORMATION: 3871 { 3872 struct file_names_info *fninfo; 3873 3874 fninfo = (struct file_names_info *)d_info->rptr; 3875 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3876 d_info->name = fninfo->FileName; 3877 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3878 return 0; 3879 } 3880 case FILEID_FULL_DIRECTORY_INFORMATION: 3881 { 3882 FILE_ID_FULL_DIR_INFO *dinfo; 3883 3884 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->rptr; 3885 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3886 d_info->name = dinfo->FileName; 3887 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3888 return 0; 3889 } 3890 case FILEID_BOTH_DIRECTORY_INFORMATION: 3891 { 3892 struct file_id_both_directory_info *fibdinfo; 3893 3894 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3895 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3896 d_info->name = fibdinfo->FileName; 3897 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3898 return 0; 3899 } 3900 case SMB_FIND_FILE_POSIX_INFO: 3901 { 3902 struct smb2_posix_info *posix_info; 3903 3904 posix_info = (struct smb2_posix_info *)d_info->rptr; 3905 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3906 d_info->name = posix_info->name; 3907 d_info->name_len = le32_to_cpu(posix_info->name_len); 3908 return 0; 3909 } 3910 default: 3911 return -EINVAL; 3912 } 3913 } 3914 3915 /** 3916 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3917 * buffer 3918 * @conn: connection instance 3919 * @info_level: smb information level 3920 * @d_info: structure included variables for query dir 3921 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3922 * 3923 * if directory has many entries, find first can't read it fully. 3924 * find next might be called multiple times to read remaining dir entries 3925 * 3926 * Return: 0 on success, otherwise error 3927 */ 3928 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3929 struct ksmbd_dir_info *d_info, 3930 struct ksmbd_kstat *ksmbd_kstat) 3931 { 3932 int next_entry_offset = 0; 3933 char *conv_name; 3934 int conv_len; 3935 void *kstat; 3936 int struct_sz, rc = 0; 3937 3938 conv_name = ksmbd_convert_dir_info_name(d_info, 3939 conn->local_nls, 3940 &conv_len); 3941 if (!conv_name) 3942 return -ENOMEM; 3943 3944 /* Somehow the name has only terminating NULL bytes */ 3945 if (conv_len < 0) { 3946 rc = -EINVAL; 3947 goto free_conv_name; 3948 } 3949 3950 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3951 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3952 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3953 3954 if (next_entry_offset > d_info->out_buf_len) { 3955 d_info->out_buf_len = 0; 3956 rc = -ENOSPC; 3957 goto free_conv_name; 3958 } 3959 3960 kstat = d_info->wptr; 3961 if (info_level != FILE_NAMES_INFORMATION) 3962 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3963 3964 switch (info_level) { 3965 case FILE_FULL_DIRECTORY_INFORMATION: 3966 { 3967 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3968 3969 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)kstat; 3970 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3971 ffdinfo->EaSize = 3972 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3973 if (ffdinfo->EaSize) 3974 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3975 if (d_info->hide_dot_file && d_info->name[0] == '.') 3976 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3977 memcpy(ffdinfo->FileName, conv_name, conv_len); 3978 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3979 break; 3980 } 3981 case FILE_BOTH_DIRECTORY_INFORMATION: 3982 { 3983 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3984 3985 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)kstat; 3986 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3987 fbdinfo->EaSize = 3988 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3989 if (fbdinfo->EaSize) 3990 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3991 fbdinfo->ShortNameLength = 0; 3992 fbdinfo->Reserved = 0; 3993 if (d_info->hide_dot_file && d_info->name[0] == '.') 3994 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3995 memcpy(fbdinfo->FileName, conv_name, conv_len); 3996 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3997 break; 3998 } 3999 case FILE_DIRECTORY_INFORMATION: 4000 { 4001 FILE_DIRECTORY_INFO *fdinfo; 4002 4003 fdinfo = (FILE_DIRECTORY_INFO *)kstat; 4004 fdinfo->FileNameLength = cpu_to_le32(conv_len); 4005 if (d_info->hide_dot_file && d_info->name[0] == '.') 4006 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4007 memcpy(fdinfo->FileName, conv_name, conv_len); 4008 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4009 break; 4010 } 4011 case FILE_NAMES_INFORMATION: 4012 { 4013 struct file_names_info *fninfo; 4014 4015 fninfo = (struct file_names_info *)kstat; 4016 fninfo->FileNameLength = cpu_to_le32(conv_len); 4017 memcpy(fninfo->FileName, conv_name, conv_len); 4018 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4019 break; 4020 } 4021 case FILEID_FULL_DIRECTORY_INFORMATION: 4022 { 4023 FILE_ID_FULL_DIR_INFO *dinfo; 4024 4025 dinfo = (FILE_ID_FULL_DIR_INFO *)kstat; 4026 dinfo->FileNameLength = cpu_to_le32(conv_len); 4027 dinfo->EaSize = 4028 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4029 if (dinfo->EaSize) 4030 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4031 dinfo->Reserved = 0; 4032 if (conn->is_aapl) 4033 dinfo->UniqueId = 0; 4034 else 4035 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4036 if (d_info->hide_dot_file && d_info->name[0] == '.') 4037 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4038 memcpy(dinfo->FileName, conv_name, conv_len); 4039 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4040 break; 4041 } 4042 case FILEID_BOTH_DIRECTORY_INFORMATION: 4043 { 4044 struct file_id_both_directory_info *fibdinfo; 4045 4046 fibdinfo = (struct file_id_both_directory_info *)kstat; 4047 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 4048 fibdinfo->EaSize = 4049 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4050 if (fibdinfo->EaSize) 4051 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4052 if (conn->is_aapl) 4053 fibdinfo->UniqueId = 0; 4054 else 4055 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4056 fibdinfo->ShortNameLength = 0; 4057 fibdinfo->Reserved = 0; 4058 fibdinfo->Reserved2 = cpu_to_le16(0); 4059 if (d_info->hide_dot_file && d_info->name[0] == '.') 4060 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4061 memcpy(fibdinfo->FileName, conv_name, conv_len); 4062 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4063 break; 4064 } 4065 case SMB_FIND_FILE_POSIX_INFO: 4066 { 4067 struct smb2_posix_info *posix_info; 4068 u64 time; 4069 4070 posix_info = (struct smb2_posix_info *)kstat; 4071 posix_info->Ignored = 0; 4072 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 4073 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 4074 posix_info->ChangeTime = cpu_to_le64(time); 4075 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 4076 posix_info->LastAccessTime = cpu_to_le64(time); 4077 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 4078 posix_info->LastWriteTime = cpu_to_le64(time); 4079 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 4080 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 4081 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 4082 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 4083 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 4084 switch (ksmbd_kstat->kstat->mode & S_IFMT) { 4085 case S_IFDIR: 4086 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 4087 break; 4088 case S_IFLNK: 4089 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 4090 break; 4091 case S_IFCHR: 4092 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 4093 break; 4094 case S_IFBLK: 4095 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 4096 break; 4097 case S_IFIFO: 4098 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 4099 break; 4100 case S_IFSOCK: 4101 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 4102 } 4103 4104 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 4105 posix_info->DosAttributes = 4106 S_ISDIR(ksmbd_kstat->kstat->mode) ? 4107 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 4108 if (d_info->hide_dot_file && d_info->name[0] == '.') 4109 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4110 /* 4111 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4112 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4113 * sub_auth(4 * 1(num_subauth)) + RID(4). 4114 */ 4115 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 4116 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 4117 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 4118 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 4119 memcpy(posix_info->name, conv_name, conv_len); 4120 posix_info->name_len = cpu_to_le32(conv_len); 4121 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 4122 break; 4123 } 4124 4125 } /* switch (info_level) */ 4126 4127 d_info->last_entry_offset = d_info->data_count; 4128 d_info->data_count += next_entry_offset; 4129 d_info->out_buf_len -= next_entry_offset; 4130 d_info->wptr += next_entry_offset; 4131 4132 ksmbd_debug(SMB, 4133 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 4134 info_level, d_info->out_buf_len, 4135 next_entry_offset, d_info->data_count); 4136 4137 free_conv_name: 4138 kfree(conv_name); 4139 return rc; 4140 } 4141 4142 struct smb2_query_dir_private { 4143 struct ksmbd_work *work; 4144 char *search_pattern; 4145 struct ksmbd_file *dir_fp; 4146 4147 struct ksmbd_dir_info *d_info; 4148 int info_level; 4149 }; 4150 4151 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 4152 { 4153 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 4154 struct kstat kstat; 4155 struct ksmbd_kstat ksmbd_kstat; 4156 int rc; 4157 int i; 4158 4159 for (i = 0; i < priv->d_info->num_entry; i++) { 4160 struct dentry *dent; 4161 4162 if (dentry_name(priv->d_info, priv->info_level)) 4163 return -EINVAL; 4164 4165 dent = lookup_one_unlocked(idmap, 4166 &QSTR_LEN(priv->d_info->name, 4167 priv->d_info->name_len), 4168 priv->dir_fp->filp->f_path.dentry); 4169 4170 if (IS_ERR(dent)) { 4171 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 4172 priv->d_info->name, 4173 PTR_ERR(dent)); 4174 continue; 4175 } 4176 if (unlikely(d_is_negative(dent))) { 4177 dput(dent); 4178 ksmbd_debug(SMB, "Negative dentry `%s'\n", 4179 priv->d_info->name); 4180 continue; 4181 } 4182 4183 ksmbd_kstat.kstat = &kstat; 4184 if (priv->info_level != FILE_NAMES_INFORMATION) { 4185 rc = ksmbd_vfs_fill_dentry_attrs(priv->work, 4186 idmap, 4187 dent, 4188 &ksmbd_kstat); 4189 if (rc) { 4190 dput(dent); 4191 continue; 4192 } 4193 } 4194 4195 rc = smb2_populate_readdir_entry(priv->work->conn, 4196 priv->info_level, 4197 priv->d_info, 4198 &ksmbd_kstat); 4199 dput(dent); 4200 if (rc) 4201 return rc; 4202 } 4203 return 0; 4204 } 4205 4206 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 4207 int info_level) 4208 { 4209 int struct_sz; 4210 int conv_len; 4211 int next_entry_offset; 4212 4213 struct_sz = readdir_info_level_struct_sz(info_level); 4214 if (struct_sz == -EOPNOTSUPP) 4215 return -EOPNOTSUPP; 4216 4217 conv_len = (d_info->name_len + 1) * 2; 4218 next_entry_offset = ALIGN(struct_sz + conv_len, 4219 KSMBD_DIR_INFO_ALIGNMENT); 4220 4221 if (next_entry_offset > d_info->out_buf_len) { 4222 d_info->out_buf_len = 0; 4223 return -ENOSPC; 4224 } 4225 4226 switch (info_level) { 4227 case FILE_FULL_DIRECTORY_INFORMATION: 4228 { 4229 FILE_FULL_DIRECTORY_INFO *ffdinfo; 4230 4231 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->wptr; 4232 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 4233 ffdinfo->FileName[d_info->name_len] = 0x00; 4234 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4235 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4236 break; 4237 } 4238 case FILE_BOTH_DIRECTORY_INFORMATION: 4239 { 4240 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 4241 4242 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->wptr; 4243 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 4244 fbdinfo->FileName[d_info->name_len] = 0x00; 4245 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4246 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4247 break; 4248 } 4249 case FILE_DIRECTORY_INFORMATION: 4250 { 4251 FILE_DIRECTORY_INFO *fdinfo; 4252 4253 fdinfo = (FILE_DIRECTORY_INFO *)d_info->wptr; 4254 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 4255 fdinfo->FileName[d_info->name_len] = 0x00; 4256 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4257 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4258 break; 4259 } 4260 case FILE_NAMES_INFORMATION: 4261 { 4262 struct file_names_info *fninfo; 4263 4264 fninfo = (struct file_names_info *)d_info->wptr; 4265 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 4266 fninfo->FileName[d_info->name_len] = 0x00; 4267 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 4268 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4269 break; 4270 } 4271 case FILEID_FULL_DIRECTORY_INFORMATION: 4272 { 4273 FILE_ID_FULL_DIR_INFO *dinfo; 4274 4275 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->wptr; 4276 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 4277 dinfo->FileName[d_info->name_len] = 0x00; 4278 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4279 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4280 break; 4281 } 4282 case FILEID_BOTH_DIRECTORY_INFORMATION: 4283 { 4284 struct file_id_both_directory_info *fibdinfo; 4285 4286 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 4287 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 4288 fibdinfo->FileName[d_info->name_len] = 0x00; 4289 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4290 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4291 break; 4292 } 4293 case SMB_FIND_FILE_POSIX_INFO: 4294 { 4295 struct smb2_posix_info *posix_info; 4296 4297 posix_info = (struct smb2_posix_info *)d_info->wptr; 4298 memcpy(posix_info->name, d_info->name, d_info->name_len); 4299 posix_info->name[d_info->name_len] = 0x00; 4300 posix_info->name_len = cpu_to_le32(d_info->name_len); 4301 posix_info->NextEntryOffset = 4302 cpu_to_le32(next_entry_offset); 4303 break; 4304 } 4305 } /* switch (info_level) */ 4306 4307 d_info->num_entry++; 4308 d_info->out_buf_len -= next_entry_offset; 4309 d_info->wptr += next_entry_offset; 4310 return 0; 4311 } 4312 4313 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 4314 loff_t offset, u64 ino, unsigned int d_type) 4315 { 4316 struct ksmbd_readdir_data *buf; 4317 struct smb2_query_dir_private *priv; 4318 struct ksmbd_dir_info *d_info; 4319 int rc; 4320 4321 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 4322 priv = buf->private; 4323 d_info = priv->d_info; 4324 4325 /* dot and dotdot entries are already reserved */ 4326 if (!strcmp(".", name) || !strcmp("..", name)) 4327 return true; 4328 d_info->num_scan++; 4329 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 4330 return true; 4331 if (!match_pattern(name, namlen, priv->search_pattern)) 4332 return true; 4333 4334 d_info->name = name; 4335 d_info->name_len = namlen; 4336 rc = reserve_populate_dentry(d_info, priv->info_level); 4337 if (rc) 4338 return false; 4339 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 4340 d_info->out_buf_len = 0; 4341 return true; 4342 } 4343 4344 static int verify_info_level(int info_level) 4345 { 4346 switch (info_level) { 4347 case FILE_FULL_DIRECTORY_INFORMATION: 4348 case FILE_BOTH_DIRECTORY_INFORMATION: 4349 case FILE_DIRECTORY_INFORMATION: 4350 case FILE_NAMES_INFORMATION: 4351 case FILEID_FULL_DIRECTORY_INFORMATION: 4352 case FILEID_BOTH_DIRECTORY_INFORMATION: 4353 case SMB_FIND_FILE_POSIX_INFO: 4354 break; 4355 default: 4356 return -EOPNOTSUPP; 4357 } 4358 4359 return 0; 4360 } 4361 4362 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4363 { 4364 int free_len; 4365 4366 free_len = (int)(work->response_sz - 4367 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4368 return free_len; 4369 } 4370 4371 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4372 unsigned short hdr2_len, 4373 unsigned int out_buf_len) 4374 { 4375 int free_len; 4376 4377 if (out_buf_len > work->conn->vals->max_trans_size) 4378 return -EINVAL; 4379 4380 free_len = smb2_resp_buf_len(work, hdr2_len); 4381 if (free_len < 0) 4382 return -EINVAL; 4383 4384 return min_t(int, out_buf_len, free_len); 4385 } 4386 4387 int smb2_query_dir(struct ksmbd_work *work) 4388 { 4389 struct ksmbd_conn *conn = work->conn; 4390 struct smb2_query_directory_req *req; 4391 struct smb2_query_directory_rsp *rsp; 4392 struct ksmbd_share_config *share = work->tcon->share_conf; 4393 struct ksmbd_file *dir_fp = NULL; 4394 struct ksmbd_dir_info d_info; 4395 int rc = 0; 4396 char *srch_ptr = NULL; 4397 unsigned char srch_flag; 4398 int buffer_sz; 4399 struct smb2_query_dir_private query_dir_private = {NULL, }; 4400 4401 ksmbd_debug(SMB, "Received smb2 query directory request\n"); 4402 4403 WORK_BUFFERS(work, req, rsp); 4404 4405 if (ksmbd_override_fsids(work)) { 4406 rsp->hdr.Status = STATUS_NO_MEMORY; 4407 smb2_set_err_rsp(work); 4408 return -ENOMEM; 4409 } 4410 4411 rc = verify_info_level(req->FileInformationClass); 4412 if (rc) { 4413 rc = -EFAULT; 4414 goto err_out2; 4415 } 4416 4417 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4418 if (!dir_fp) { 4419 rc = -EBADF; 4420 goto err_out2; 4421 } 4422 4423 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4424 inode_permission(file_mnt_idmap(dir_fp->filp), 4425 file_inode(dir_fp->filp), 4426 MAY_READ | MAY_EXEC)) { 4427 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4428 rc = -EACCES; 4429 goto err_out2; 4430 } 4431 4432 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4433 pr_err("can't do query dir for a file\n"); 4434 rc = -EINVAL; 4435 goto err_out2; 4436 } 4437 4438 srch_flag = req->Flags; 4439 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), 4440 le16_to_cpu(req->FileNameLength), 1, 4441 conn->local_nls); 4442 if (IS_ERR(srch_ptr)) { 4443 ksmbd_debug(SMB, "Search Pattern not found\n"); 4444 rc = -EINVAL; 4445 goto err_out2; 4446 } else { 4447 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4448 } 4449 4450 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4451 ksmbd_debug(SMB, "Restart directory scan\n"); 4452 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4453 } 4454 4455 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4456 d_info.wptr = (char *)rsp->Buffer; 4457 d_info.rptr = (char *)rsp->Buffer; 4458 d_info.out_buf_len = 4459 smb2_calc_max_out_buf_len(work, 4460 offsetof(struct smb2_query_directory_rsp, Buffer), 4461 le32_to_cpu(req->OutputBufferLength)); 4462 if (d_info.out_buf_len < 0) { 4463 rc = -EINVAL; 4464 goto err_out; 4465 } 4466 d_info.flags = srch_flag; 4467 4468 /* 4469 * reserve dot and dotdot entries in head of buffer 4470 * in first response 4471 */ 4472 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4473 dir_fp, &d_info, srch_ptr, 4474 smb2_populate_readdir_entry); 4475 if (rc == -ENOSPC) 4476 rc = 0; 4477 else if (rc) 4478 goto err_out; 4479 4480 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4481 d_info.hide_dot_file = true; 4482 4483 buffer_sz = d_info.out_buf_len; 4484 d_info.rptr = d_info.wptr; 4485 query_dir_private.work = work; 4486 query_dir_private.search_pattern = srch_ptr; 4487 query_dir_private.dir_fp = dir_fp; 4488 query_dir_private.d_info = &d_info; 4489 query_dir_private.info_level = req->FileInformationClass; 4490 dir_fp->readdir_data.private = &query_dir_private; 4491 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4492 again: 4493 d_info.num_scan = 0; 4494 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4495 /* 4496 * num_entry can be 0 if the directory iteration stops before reaching 4497 * the end of the directory and no file is matched with the search 4498 * pattern. 4499 */ 4500 if (rc >= 0 && !d_info.num_entry && d_info.num_scan && 4501 d_info.out_buf_len > 0) 4502 goto again; 4503 /* 4504 * req->OutputBufferLength is too small to contain even one entry. 4505 * In this case, it immediately returns OutputBufferLength 0 to client. 4506 */ 4507 if (!d_info.out_buf_len && !d_info.num_entry) 4508 goto no_buf_len; 4509 if (rc > 0 || rc == -ENOSPC) 4510 rc = 0; 4511 else if (rc) 4512 goto err_out; 4513 4514 d_info.wptr = d_info.rptr; 4515 d_info.out_buf_len = buffer_sz; 4516 rc = process_query_dir_entries(&query_dir_private); 4517 if (rc) 4518 goto err_out; 4519 4520 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4521 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4522 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4523 } else { 4524 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4525 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4526 } 4527 rsp->StructureSize = cpu_to_le16(9); 4528 rsp->OutputBufferOffset = cpu_to_le16(0); 4529 rsp->OutputBufferLength = cpu_to_le32(0); 4530 rsp->Buffer[0] = 0; 4531 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4532 offsetof(struct smb2_query_directory_rsp, Buffer) 4533 + 1); 4534 if (rc) 4535 goto err_out; 4536 } else { 4537 no_buf_len: 4538 ((FILE_DIRECTORY_INFO *) 4539 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4540 ->NextEntryOffset = 0; 4541 if (d_info.data_count >= d_info.last_entry_off_align) 4542 d_info.data_count -= d_info.last_entry_off_align; 4543 4544 rsp->StructureSize = cpu_to_le16(9); 4545 rsp->OutputBufferOffset = cpu_to_le16(72); 4546 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4547 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4548 offsetof(struct smb2_query_directory_rsp, Buffer) + 4549 d_info.data_count); 4550 if (rc) 4551 goto err_out; 4552 } 4553 4554 kfree(srch_ptr); 4555 ksmbd_fd_put(work, dir_fp); 4556 ksmbd_revert_fsids(work); 4557 return 0; 4558 4559 err_out: 4560 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4561 kfree(srch_ptr); 4562 4563 err_out2: 4564 if (rc == -EINVAL) 4565 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4566 else if (rc == -EACCES) 4567 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4568 else if (rc == -ENOENT) 4569 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4570 else if (rc == -EBADF) 4571 rsp->hdr.Status = STATUS_FILE_CLOSED; 4572 else if (rc == -ENOMEM) 4573 rsp->hdr.Status = STATUS_NO_MEMORY; 4574 else if (rc == -EFAULT) 4575 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4576 else if (rc == -EIO) 4577 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4578 if (!rsp->hdr.Status) 4579 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4580 4581 smb2_set_err_rsp(work); 4582 ksmbd_fd_put(work, dir_fp); 4583 ksmbd_revert_fsids(work); 4584 return rc; 4585 } 4586 4587 /** 4588 * buffer_check_err() - helper function to check buffer errors 4589 * @reqOutputBufferLength: max buffer length expected in command response 4590 * @rsp: query info response buffer contains output buffer length 4591 * @rsp_org: base response buffer pointer in case of chained response 4592 * 4593 * Return: 0 on success, otherwise error 4594 */ 4595 static int buffer_check_err(int reqOutputBufferLength, 4596 struct smb2_query_info_rsp *rsp, 4597 void *rsp_org) 4598 { 4599 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4600 pr_err("Invalid Buffer Size Requested\n"); 4601 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4602 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4603 return -EINVAL; 4604 } 4605 return 0; 4606 } 4607 4608 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4609 void *rsp_org) 4610 { 4611 struct smb2_file_standard_info *sinfo; 4612 4613 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4614 4615 sinfo->AllocationSize = cpu_to_le64(4096); 4616 sinfo->EndOfFile = cpu_to_le64(0); 4617 sinfo->NumberOfLinks = cpu_to_le32(1); 4618 sinfo->DeletePending = 1; 4619 sinfo->Directory = 0; 4620 rsp->OutputBufferLength = 4621 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4622 } 4623 4624 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4625 void *rsp_org) 4626 { 4627 struct smb2_file_internal_info *file_info; 4628 4629 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4630 4631 /* any unique number */ 4632 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4633 rsp->OutputBufferLength = 4634 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4635 } 4636 4637 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4638 struct smb2_query_info_req *req, 4639 struct smb2_query_info_rsp *rsp, 4640 void *rsp_org) 4641 { 4642 u64 id; 4643 int rc; 4644 4645 /* 4646 * Windows can sometime send query file info request on 4647 * pipe without opening it, checking error condition here 4648 */ 4649 id = req->VolatileFileId; 4650 4651 lockdep_assert_not_held(&sess->rpc_lock); 4652 4653 down_read(&sess->rpc_lock); 4654 if (!ksmbd_session_rpc_method(sess, id)) { 4655 up_read(&sess->rpc_lock); 4656 return -ENOENT; 4657 } 4658 up_read(&sess->rpc_lock); 4659 4660 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4661 req->FileInfoClass, req->VolatileFileId); 4662 4663 switch (req->FileInfoClass) { 4664 case FILE_STANDARD_INFORMATION: 4665 get_standard_info_pipe(rsp, rsp_org); 4666 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4667 rsp, rsp_org); 4668 break; 4669 case FILE_INTERNAL_INFORMATION: 4670 get_internal_info_pipe(rsp, id, rsp_org); 4671 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4672 rsp, rsp_org); 4673 break; 4674 default: 4675 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4676 req->FileInfoClass); 4677 rc = -EOPNOTSUPP; 4678 } 4679 return rc; 4680 } 4681 4682 /** 4683 * smb2_get_ea() - handler for smb2 get extended attribute command 4684 * @work: smb work containing query info command buffer 4685 * @fp: ksmbd_file pointer 4686 * @req: get extended attribute request 4687 * @rsp: response buffer pointer 4688 * @rsp_org: base response buffer pointer in case of chained response 4689 * 4690 * Return: 0 on success, otherwise error 4691 */ 4692 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4693 struct smb2_query_info_req *req, 4694 struct smb2_query_info_rsp *rsp, void *rsp_org) 4695 { 4696 struct smb2_ea_info *eainfo, *prev_eainfo; 4697 char *name, *ptr, *xattr_list = NULL, *buf; 4698 int rc, name_len, value_len, xattr_list_len, idx; 4699 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4700 struct smb2_ea_info_req *ea_req = NULL; 4701 const struct path *path; 4702 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4703 4704 if (!(fp->daccess & FILE_READ_EA_LE)) { 4705 pr_err("Not permitted to read ext attr : 0x%x\n", 4706 fp->daccess); 4707 return -EACCES; 4708 } 4709 4710 path = &fp->filp->f_path; 4711 /* single EA entry is requested with given user.* name */ 4712 if (req->InputBufferLength) { 4713 if (le32_to_cpu(req->InputBufferLength) <= 4714 sizeof(struct smb2_ea_info_req)) 4715 return -EINVAL; 4716 4717 ea_req = (struct smb2_ea_info_req *)((char *)req + 4718 le16_to_cpu(req->InputBufferOffset)); 4719 4720 if (le32_to_cpu(req->InputBufferLength) < 4721 offsetof(struct smb2_ea_info_req, name) + 4722 ea_req->EaNameLength) 4723 return -EINVAL; 4724 } else { 4725 /* need to send all EAs, if no specific EA is requested*/ 4726 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4727 ksmbd_debug(SMB, 4728 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4729 le32_to_cpu(req->Flags)); 4730 } 4731 4732 buf_free_len = 4733 smb2_calc_max_out_buf_len(work, 4734 offsetof(struct smb2_query_info_rsp, Buffer), 4735 le32_to_cpu(req->OutputBufferLength)); 4736 if (buf_free_len < 0) 4737 return -EINVAL; 4738 4739 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4740 if (rc < 0) { 4741 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4742 goto out; 4743 } else if (!rc) { /* there is no EA in the file */ 4744 ksmbd_debug(SMB, "no ea data in the file\n"); 4745 goto done; 4746 } 4747 xattr_list_len = rc; 4748 4749 ptr = (char *)rsp->Buffer; 4750 eainfo = (struct smb2_ea_info *)ptr; 4751 prev_eainfo = eainfo; 4752 idx = 0; 4753 4754 while (idx < xattr_list_len) { 4755 name = xattr_list + idx; 4756 name_len = strlen(name); 4757 4758 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4759 idx += name_len + 1; 4760 4761 /* 4762 * CIFS does not support EA other than user.* namespace, 4763 * still keep the framework generic, to list other attrs 4764 * in future. 4765 */ 4766 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4767 continue; 4768 4769 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4770 STREAM_PREFIX_LEN)) 4771 continue; 4772 4773 if (req->InputBufferLength && 4774 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4775 ea_req->EaNameLength)) 4776 continue; 4777 4778 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4779 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4780 continue; 4781 4782 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4783 name_len -= XATTR_USER_PREFIX_LEN; 4784 4785 ptr = eainfo->name + name_len + 1; 4786 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4787 name_len + 1); 4788 /* bailout if xattr can't fit in buf_free_len */ 4789 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4790 name, &buf); 4791 if (value_len <= 0) { 4792 rc = -ENOENT; 4793 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4794 goto out; 4795 } 4796 4797 buf_free_len -= value_len; 4798 if (buf_free_len < 0) { 4799 kfree(buf); 4800 break; 4801 } 4802 4803 memcpy(ptr, buf, value_len); 4804 kfree(buf); 4805 4806 ptr += value_len; 4807 eainfo->Flags = 0; 4808 eainfo->EaNameLength = name_len; 4809 4810 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4811 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4812 name_len); 4813 else 4814 memcpy(eainfo->name, name, name_len); 4815 4816 eainfo->name[name_len] = '\0'; 4817 eainfo->EaValueLength = cpu_to_le16(value_len); 4818 next_offset = offsetof(struct smb2_ea_info, name) + 4819 name_len + 1 + value_len; 4820 4821 /* align next xattr entry at 4 byte bundary */ 4822 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4823 if (alignment_bytes) { 4824 memset(ptr, '\0', alignment_bytes); 4825 ptr += alignment_bytes; 4826 next_offset += alignment_bytes; 4827 buf_free_len -= alignment_bytes; 4828 } 4829 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4830 prev_eainfo = eainfo; 4831 eainfo = (struct smb2_ea_info *)ptr; 4832 rsp_data_cnt += next_offset; 4833 4834 if (req->InputBufferLength) { 4835 ksmbd_debug(SMB, "single entry requested\n"); 4836 break; 4837 } 4838 } 4839 4840 /* no more ea entries */ 4841 prev_eainfo->NextEntryOffset = 0; 4842 done: 4843 rc = 0; 4844 if (rsp_data_cnt == 0) 4845 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4846 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4847 out: 4848 kvfree(xattr_list); 4849 return rc; 4850 } 4851 4852 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4853 struct ksmbd_file *fp, void *rsp_org) 4854 { 4855 struct smb2_file_access_info *file_info; 4856 4857 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4858 file_info->AccessFlags = fp->daccess; 4859 rsp->OutputBufferLength = 4860 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4861 } 4862 4863 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4864 struct ksmbd_file *fp, void *rsp_org) 4865 { 4866 struct file_basic_info *basic_info; 4867 struct kstat stat; 4868 u64 time; 4869 int ret; 4870 4871 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4872 pr_err("no right to read the attributes : 0x%x\n", 4873 fp->daccess); 4874 return -EACCES; 4875 } 4876 4877 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4878 AT_STATX_SYNC_AS_STAT); 4879 if (ret) 4880 return ret; 4881 4882 basic_info = (struct file_basic_info *)rsp->Buffer; 4883 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4884 time = ksmbd_UnixTimeToNT(stat.atime); 4885 basic_info->LastAccessTime = cpu_to_le64(time); 4886 time = ksmbd_UnixTimeToNT(stat.mtime); 4887 basic_info->LastWriteTime = cpu_to_le64(time); 4888 time = ksmbd_UnixTimeToNT(stat.ctime); 4889 basic_info->ChangeTime = cpu_to_le64(time); 4890 basic_info->Attributes = fp->f_ci->m_fattr; 4891 basic_info->Pad = 0; 4892 rsp->OutputBufferLength = 4893 cpu_to_le32(sizeof(struct file_basic_info)); 4894 return 0; 4895 } 4896 4897 static int get_file_standard_info(struct smb2_query_info_rsp *rsp, 4898 struct ksmbd_file *fp, void *rsp_org) 4899 { 4900 struct smb2_file_standard_info *sinfo; 4901 unsigned int delete_pending; 4902 struct kstat stat; 4903 int ret; 4904 4905 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4906 AT_STATX_SYNC_AS_STAT); 4907 if (ret) 4908 return ret; 4909 4910 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4911 delete_pending = ksmbd_inode_pending_delete(fp); 4912 4913 if (ksmbd_stream_fd(fp) == false) { 4914 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); 4915 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4916 } else { 4917 sinfo->AllocationSize = cpu_to_le64(fp->stream.size); 4918 sinfo->EndOfFile = cpu_to_le64(fp->stream.size); 4919 } 4920 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4921 sinfo->DeletePending = delete_pending; 4922 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4923 rsp->OutputBufferLength = 4924 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4925 4926 return 0; 4927 } 4928 4929 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4930 void *rsp_org) 4931 { 4932 struct smb2_file_alignment_info *file_info; 4933 4934 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4935 file_info->AlignmentRequirement = 0; 4936 rsp->OutputBufferLength = 4937 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4938 } 4939 4940 static int get_file_all_info(struct ksmbd_work *work, 4941 struct smb2_query_info_rsp *rsp, 4942 struct ksmbd_file *fp, 4943 void *rsp_org) 4944 { 4945 struct ksmbd_conn *conn = work->conn; 4946 struct smb2_file_all_info *file_info; 4947 unsigned int delete_pending; 4948 struct kstat stat; 4949 int conv_len; 4950 char *filename; 4951 u64 time; 4952 int ret, buf_free_len, filename_len; 4953 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4954 4955 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4956 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4957 fp->daccess); 4958 return -EACCES; 4959 } 4960 4961 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4962 if (IS_ERR(filename)) 4963 return PTR_ERR(filename); 4964 4965 filename_len = strlen(filename); 4966 buf_free_len = smb2_calc_max_out_buf_len(work, 4967 offsetof(struct smb2_query_info_rsp, Buffer) + 4968 offsetof(struct smb2_file_all_info, FileName), 4969 le32_to_cpu(req->OutputBufferLength)); 4970 if (buf_free_len < (filename_len + 1) * 2) { 4971 kfree(filename); 4972 return -EINVAL; 4973 } 4974 4975 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4976 AT_STATX_SYNC_AS_STAT); 4977 if (ret) { 4978 kfree(filename); 4979 return ret; 4980 } 4981 4982 ksmbd_debug(SMB, "filename = %s\n", filename); 4983 delete_pending = ksmbd_inode_pending_delete(fp); 4984 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4985 4986 file_info->CreationTime = cpu_to_le64(fp->create_time); 4987 time = ksmbd_UnixTimeToNT(stat.atime); 4988 file_info->LastAccessTime = cpu_to_le64(time); 4989 time = ksmbd_UnixTimeToNT(stat.mtime); 4990 file_info->LastWriteTime = cpu_to_le64(time); 4991 time = ksmbd_UnixTimeToNT(stat.ctime); 4992 file_info->ChangeTime = cpu_to_le64(time); 4993 file_info->Attributes = fp->f_ci->m_fattr; 4994 file_info->Pad1 = 0; 4995 if (ksmbd_stream_fd(fp) == false) { 4996 file_info->AllocationSize = 4997 cpu_to_le64(stat.blocks << 9); 4998 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4999 } else { 5000 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5001 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5002 } 5003 file_info->NumberOfLinks = 5004 cpu_to_le32(get_nlink(&stat) - delete_pending); 5005 file_info->DeletePending = delete_pending; 5006 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 5007 file_info->Pad2 = 0; 5008 file_info->IndexNumber = cpu_to_le64(stat.ino); 5009 file_info->EASize = 0; 5010 file_info->AccessFlags = fp->daccess; 5011 if (ksmbd_stream_fd(fp) == false) 5012 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5013 else 5014 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5015 file_info->Mode = fp->coption; 5016 file_info->AlignmentRequirement = 0; 5017 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 5018 min(filename_len, PATH_MAX), 5019 conn->local_nls, 0); 5020 conv_len *= 2; 5021 file_info->FileNameLength = cpu_to_le32(conv_len); 5022 rsp->OutputBufferLength = 5023 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 5024 kfree(filename); 5025 return 0; 5026 } 5027 5028 static void get_file_alternate_info(struct ksmbd_work *work, 5029 struct smb2_query_info_rsp *rsp, 5030 struct ksmbd_file *fp, 5031 void *rsp_org) 5032 { 5033 struct ksmbd_conn *conn = work->conn; 5034 struct smb2_file_alt_name_info *file_info; 5035 struct dentry *dentry = fp->filp->f_path.dentry; 5036 int conv_len; 5037 5038 spin_lock(&dentry->d_lock); 5039 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 5040 conv_len = ksmbd_extract_shortname(conn, 5041 dentry->d_name.name, 5042 file_info->FileName); 5043 spin_unlock(&dentry->d_lock); 5044 file_info->FileNameLength = cpu_to_le32(conv_len); 5045 rsp->OutputBufferLength = 5046 cpu_to_le32(struct_size(file_info, FileName, conv_len)); 5047 } 5048 5049 static int get_file_stream_info(struct ksmbd_work *work, 5050 struct smb2_query_info_rsp *rsp, 5051 struct ksmbd_file *fp, 5052 void *rsp_org) 5053 { 5054 struct ksmbd_conn *conn = work->conn; 5055 struct smb2_file_stream_info *file_info; 5056 char *stream_name, *xattr_list = NULL, *stream_buf; 5057 struct kstat stat; 5058 const struct path *path = &fp->filp->f_path; 5059 ssize_t xattr_list_len; 5060 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 5061 int buf_free_len; 5062 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 5063 int ret; 5064 5065 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5066 AT_STATX_SYNC_AS_STAT); 5067 if (ret) 5068 return ret; 5069 5070 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 5071 5072 buf_free_len = 5073 smb2_calc_max_out_buf_len(work, 5074 offsetof(struct smb2_query_info_rsp, Buffer), 5075 le32_to_cpu(req->OutputBufferLength)); 5076 if (buf_free_len < 0) 5077 goto out; 5078 5079 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 5080 if (xattr_list_len < 0) { 5081 goto out; 5082 } else if (!xattr_list_len) { 5083 ksmbd_debug(SMB, "empty xattr in the file\n"); 5084 goto out; 5085 } 5086 5087 while (idx < xattr_list_len) { 5088 stream_name = xattr_list + idx; 5089 streamlen = strlen(stream_name); 5090 idx += streamlen + 1; 5091 5092 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 5093 5094 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 5095 STREAM_PREFIX, STREAM_PREFIX_LEN)) 5096 continue; 5097 5098 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 5099 STREAM_PREFIX_LEN); 5100 streamlen = stream_name_len; 5101 5102 /* plus : size */ 5103 streamlen += 1; 5104 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP); 5105 if (!stream_buf) 5106 break; 5107 5108 streamlen = snprintf(stream_buf, streamlen + 1, 5109 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 5110 5111 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 5112 if (next > buf_free_len) { 5113 kfree(stream_buf); 5114 break; 5115 } 5116 5117 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 5118 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5119 stream_buf, streamlen, 5120 conn->local_nls, 0); 5121 streamlen *= 2; 5122 kfree(stream_buf); 5123 file_info->StreamNameLength = cpu_to_le32(streamlen); 5124 file_info->StreamSize = cpu_to_le64(stream_name_len); 5125 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 5126 5127 nbytes += next; 5128 buf_free_len -= next; 5129 file_info->NextEntryOffset = cpu_to_le32(next); 5130 } 5131 5132 out: 5133 if (!S_ISDIR(stat.mode) && 5134 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 5135 file_info = (struct smb2_file_stream_info *) 5136 &rsp->Buffer[nbytes]; 5137 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5138 "::$DATA", 7, conn->local_nls, 0); 5139 streamlen *= 2; 5140 file_info->StreamNameLength = cpu_to_le32(streamlen); 5141 file_info->StreamSize = cpu_to_le64(stat.size); 5142 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 5143 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 5144 } 5145 5146 /* last entry offset should be 0 */ 5147 file_info->NextEntryOffset = 0; 5148 kvfree(xattr_list); 5149 5150 rsp->OutputBufferLength = cpu_to_le32(nbytes); 5151 5152 return 0; 5153 } 5154 5155 static int get_file_internal_info(struct smb2_query_info_rsp *rsp, 5156 struct ksmbd_file *fp, void *rsp_org) 5157 { 5158 struct smb2_file_internal_info *file_info; 5159 struct kstat stat; 5160 int ret; 5161 5162 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5163 AT_STATX_SYNC_AS_STAT); 5164 if (ret) 5165 return ret; 5166 5167 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 5168 file_info->IndexNumber = cpu_to_le64(stat.ino); 5169 rsp->OutputBufferLength = 5170 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 5171 5172 return 0; 5173 } 5174 5175 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 5176 struct ksmbd_file *fp, void *rsp_org) 5177 { 5178 struct smb2_file_network_open_info *file_info; 5179 struct kstat stat; 5180 u64 time; 5181 int ret; 5182 5183 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5184 pr_err("no right to read the attributes : 0x%x\n", 5185 fp->daccess); 5186 return -EACCES; 5187 } 5188 5189 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5190 AT_STATX_SYNC_AS_STAT); 5191 if (ret) 5192 return ret; 5193 5194 file_info = (struct smb2_file_network_open_info *)rsp->Buffer; 5195 5196 file_info->CreationTime = cpu_to_le64(fp->create_time); 5197 time = ksmbd_UnixTimeToNT(stat.atime); 5198 file_info->LastAccessTime = cpu_to_le64(time); 5199 time = ksmbd_UnixTimeToNT(stat.mtime); 5200 file_info->LastWriteTime = cpu_to_le64(time); 5201 time = ksmbd_UnixTimeToNT(stat.ctime); 5202 file_info->ChangeTime = cpu_to_le64(time); 5203 file_info->Attributes = fp->f_ci->m_fattr; 5204 if (ksmbd_stream_fd(fp) == false) { 5205 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5206 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5207 } else { 5208 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5209 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5210 } 5211 file_info->Reserved = cpu_to_le32(0); 5212 rsp->OutputBufferLength = 5213 cpu_to_le32(sizeof(struct smb2_file_network_open_info)); 5214 return 0; 5215 } 5216 5217 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 5218 { 5219 struct smb2_file_ea_info *file_info; 5220 5221 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 5222 file_info->EASize = 0; 5223 rsp->OutputBufferLength = 5224 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 5225 } 5226 5227 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 5228 struct ksmbd_file *fp, void *rsp_org) 5229 { 5230 struct smb2_file_pos_info *file_info; 5231 5232 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 5233 if (ksmbd_stream_fd(fp) == false) 5234 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5235 else 5236 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5237 5238 rsp->OutputBufferLength = 5239 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 5240 } 5241 5242 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 5243 struct ksmbd_file *fp, void *rsp_org) 5244 { 5245 struct smb2_file_mode_info *file_info; 5246 5247 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 5248 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 5249 rsp->OutputBufferLength = 5250 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 5251 } 5252 5253 static int get_file_compression_info(struct smb2_query_info_rsp *rsp, 5254 struct ksmbd_file *fp, void *rsp_org) 5255 { 5256 struct smb2_file_comp_info *file_info; 5257 struct kstat stat; 5258 int ret; 5259 5260 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5261 AT_STATX_SYNC_AS_STAT); 5262 if (ret) 5263 return ret; 5264 5265 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 5266 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 5267 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 5268 file_info->CompressionUnitShift = 0; 5269 file_info->ChunkShift = 0; 5270 file_info->ClusterShift = 0; 5271 memset(&file_info->Reserved[0], 0, 3); 5272 5273 rsp->OutputBufferLength = 5274 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 5275 5276 return 0; 5277 } 5278 5279 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 5280 struct ksmbd_file *fp, void *rsp_org) 5281 { 5282 struct smb2_file_attr_tag_info *file_info; 5283 5284 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5285 pr_err("no right to read the attributes : 0x%x\n", 5286 fp->daccess); 5287 return -EACCES; 5288 } 5289 5290 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 5291 file_info->FileAttributes = fp->f_ci->m_fattr; 5292 file_info->ReparseTag = 0; 5293 rsp->OutputBufferLength = 5294 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 5295 return 0; 5296 } 5297 5298 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 5299 struct ksmbd_file *fp, void *rsp_org) 5300 { 5301 struct smb311_posix_qinfo *file_info; 5302 struct inode *inode = file_inode(fp->filp); 5303 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 5304 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 5305 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 5306 struct kstat stat; 5307 u64 time; 5308 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 5309 int ret; 5310 5311 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5312 AT_STATX_SYNC_AS_STAT); 5313 if (ret) 5314 return ret; 5315 5316 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 5317 file_info->CreationTime = cpu_to_le64(fp->create_time); 5318 time = ksmbd_UnixTimeToNT(stat.atime); 5319 file_info->LastAccessTime = cpu_to_le64(time); 5320 time = ksmbd_UnixTimeToNT(stat.mtime); 5321 file_info->LastWriteTime = cpu_to_le64(time); 5322 time = ksmbd_UnixTimeToNT(stat.ctime); 5323 file_info->ChangeTime = cpu_to_le64(time); 5324 file_info->DosAttributes = fp->f_ci->m_fattr; 5325 file_info->Inode = cpu_to_le64(stat.ino); 5326 if (ksmbd_stream_fd(fp) == false) { 5327 file_info->EndOfFile = cpu_to_le64(stat.size); 5328 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5329 } else { 5330 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5331 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5332 } 5333 file_info->HardLinks = cpu_to_le32(stat.nlink); 5334 file_info->Mode = cpu_to_le32(stat.mode & 0777); 5335 switch (stat.mode & S_IFMT) { 5336 case S_IFDIR: 5337 file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 5338 break; 5339 case S_IFLNK: 5340 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 5341 break; 5342 case S_IFCHR: 5343 file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 5344 break; 5345 case S_IFBLK: 5346 file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 5347 break; 5348 case S_IFIFO: 5349 file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 5350 break; 5351 case S_IFSOCK: 5352 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 5353 } 5354 5355 file_info->DeviceId = cpu_to_le32(stat.rdev); 5356 5357 /* 5358 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 5359 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 5360 * sub_auth(4 * 1(num_subauth)) + RID(4). 5361 */ 5362 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 5363 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 5364 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 5365 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 5366 5367 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 5368 5369 return 0; 5370 } 5371 5372 static int smb2_get_info_file(struct ksmbd_work *work, 5373 struct smb2_query_info_req *req, 5374 struct smb2_query_info_rsp *rsp) 5375 { 5376 struct ksmbd_file *fp; 5377 int fileinfoclass = 0; 5378 int rc = 0; 5379 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5380 5381 if (test_share_config_flag(work->tcon->share_conf, 5382 KSMBD_SHARE_FLAG_PIPE)) { 5383 /* smb2 info file called for pipe */ 5384 rc = smb2_get_info_file_pipe(work->sess, req, rsp, 5385 work->response_buf); 5386 goto iov_pin_out; 5387 } 5388 5389 if (work->next_smb2_rcv_hdr_off) { 5390 if (!has_file_id(req->VolatileFileId)) { 5391 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5392 work->compound_fid); 5393 id = work->compound_fid; 5394 pid = work->compound_pfid; 5395 } 5396 } 5397 5398 if (!has_file_id(id)) { 5399 id = req->VolatileFileId; 5400 pid = req->PersistentFileId; 5401 } 5402 5403 fp = ksmbd_lookup_fd_slow(work, id, pid); 5404 if (!fp) 5405 return -ENOENT; 5406 5407 fileinfoclass = req->FileInfoClass; 5408 5409 switch (fileinfoclass) { 5410 case FILE_ACCESS_INFORMATION: 5411 get_file_access_info(rsp, fp, work->response_buf); 5412 break; 5413 5414 case FILE_BASIC_INFORMATION: 5415 rc = get_file_basic_info(rsp, fp, work->response_buf); 5416 break; 5417 5418 case FILE_STANDARD_INFORMATION: 5419 rc = get_file_standard_info(rsp, fp, work->response_buf); 5420 break; 5421 5422 case FILE_ALIGNMENT_INFORMATION: 5423 get_file_alignment_info(rsp, work->response_buf); 5424 break; 5425 5426 case FILE_ALL_INFORMATION: 5427 rc = get_file_all_info(work, rsp, fp, work->response_buf); 5428 break; 5429 5430 case FILE_ALTERNATE_NAME_INFORMATION: 5431 get_file_alternate_info(work, rsp, fp, work->response_buf); 5432 break; 5433 5434 case FILE_STREAM_INFORMATION: 5435 rc = get_file_stream_info(work, rsp, fp, work->response_buf); 5436 break; 5437 5438 case FILE_INTERNAL_INFORMATION: 5439 rc = get_file_internal_info(rsp, fp, work->response_buf); 5440 break; 5441 5442 case FILE_NETWORK_OPEN_INFORMATION: 5443 rc = get_file_network_open_info(rsp, fp, work->response_buf); 5444 break; 5445 5446 case FILE_EA_INFORMATION: 5447 get_file_ea_info(rsp, work->response_buf); 5448 break; 5449 5450 case FILE_FULL_EA_INFORMATION: 5451 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 5452 break; 5453 5454 case FILE_POSITION_INFORMATION: 5455 get_file_position_info(rsp, fp, work->response_buf); 5456 break; 5457 5458 case FILE_MODE_INFORMATION: 5459 get_file_mode_info(rsp, fp, work->response_buf); 5460 break; 5461 5462 case FILE_COMPRESSION_INFORMATION: 5463 rc = get_file_compression_info(rsp, fp, work->response_buf); 5464 break; 5465 5466 case FILE_ATTRIBUTE_TAG_INFORMATION: 5467 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 5468 break; 5469 case SMB_FIND_FILE_POSIX_INFO: 5470 if (!work->tcon->posix_extensions) { 5471 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5472 rc = -EOPNOTSUPP; 5473 } else { 5474 rc = find_file_posix_info(rsp, fp, work->response_buf); 5475 } 5476 break; 5477 default: 5478 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 5479 fileinfoclass); 5480 rc = -EOPNOTSUPP; 5481 } 5482 if (!rc) 5483 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5484 rsp, work->response_buf); 5485 ksmbd_fd_put(work, fp); 5486 5487 iov_pin_out: 5488 if (!rc) 5489 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5490 offsetof(struct smb2_query_info_rsp, Buffer) + 5491 le32_to_cpu(rsp->OutputBufferLength)); 5492 return rc; 5493 } 5494 5495 static int smb2_get_info_filesystem(struct ksmbd_work *work, 5496 struct smb2_query_info_req *req, 5497 struct smb2_query_info_rsp *rsp) 5498 { 5499 struct ksmbd_conn *conn = work->conn; 5500 struct ksmbd_share_config *share = work->tcon->share_conf; 5501 int fsinfoclass = 0; 5502 struct kstatfs stfs; 5503 struct path path; 5504 int rc = 0, len; 5505 5506 if (!share->path) 5507 return -EIO; 5508 5509 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5510 if (rc) { 5511 pr_err("cannot create vfs path\n"); 5512 return -EIO; 5513 } 5514 5515 rc = vfs_statfs(&path, &stfs); 5516 if (rc) { 5517 pr_err("cannot do stat of path %s\n", share->path); 5518 path_put(&path); 5519 return -EIO; 5520 } 5521 5522 fsinfoclass = req->FileInfoClass; 5523 5524 switch (fsinfoclass) { 5525 case FS_DEVICE_INFORMATION: 5526 { 5527 FILE_SYSTEM_DEVICE_INFO *info; 5528 5529 info = (FILE_SYSTEM_DEVICE_INFO *)rsp->Buffer; 5530 5531 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); 5532 info->DeviceCharacteristics = 5533 cpu_to_le32(FILE_DEVICE_IS_MOUNTED); 5534 if (!test_tree_conn_flag(work->tcon, 5535 KSMBD_TREE_CONN_FLAG_WRITABLE)) 5536 info->DeviceCharacteristics |= 5537 cpu_to_le32(FILE_READ_ONLY_DEVICE); 5538 rsp->OutputBufferLength = cpu_to_le32(8); 5539 break; 5540 } 5541 case FS_ATTRIBUTE_INFORMATION: 5542 { 5543 FILE_SYSTEM_ATTRIBUTE_INFO *info; 5544 size_t sz; 5545 5546 info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer; 5547 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5548 FILE_PERSISTENT_ACLS | 5549 FILE_UNICODE_ON_DISK | 5550 FILE_CASE_PRESERVED_NAMES | 5551 FILE_CASE_SENSITIVE_SEARCH | 5552 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5553 5554 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5555 5556 if (test_share_config_flag(work->tcon->share_conf, 5557 KSMBD_SHARE_FLAG_STREAMS)) 5558 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5559 5560 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5561 /* 5562 * some application(potableapp) can not run on ksmbd share 5563 * because only NTFS handle security setting on windows. 5564 * So Although local fs(EXT4 or F2fs, etc) is not NTFS, 5565 * ksmbd should show share as NTFS. Later, If needed, we can add 5566 * fs type(s) parameter to change fs type user wanted. 5567 */ 5568 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5569 "NTFS", PATH_MAX, conn->local_nls, 0); 5570 len = len * 2; 5571 info->FileSystemNameLen = cpu_to_le32(len); 5572 sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len; 5573 rsp->OutputBufferLength = cpu_to_le32(sz); 5574 break; 5575 } 5576 case FS_VOLUME_INFORMATION: 5577 { 5578 struct filesystem_vol_info *info; 5579 size_t sz; 5580 unsigned int serial_crc = 0; 5581 5582 info = (struct filesystem_vol_info *)(rsp->Buffer); 5583 info->VolumeCreationTime = 0; 5584 serial_crc = crc32_le(serial_crc, share->name, 5585 strlen(share->name)); 5586 serial_crc = crc32_le(serial_crc, share->path, 5587 strlen(share->path)); 5588 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5589 strlen(ksmbd_netbios_name())); 5590 /* Taking dummy value of serial number*/ 5591 info->VolumeSerialNumber = cpu_to_le32(serial_crc); 5592 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5593 share->name, PATH_MAX, 5594 conn->local_nls, 0); 5595 len = len * 2; 5596 info->VolumeLabelLength = cpu_to_le32(len); 5597 info->Reserved = 0; 5598 info->SupportsObjects = 0; 5599 sz = sizeof(struct filesystem_vol_info) + len; 5600 rsp->OutputBufferLength = cpu_to_le32(sz); 5601 break; 5602 } 5603 case FS_SIZE_INFORMATION: 5604 { 5605 FILE_SYSTEM_SIZE_INFO *info; 5606 5607 info = (FILE_SYSTEM_SIZE_INFO *)(rsp->Buffer); 5608 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5609 info->AvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); 5610 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5611 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5612 rsp->OutputBufferLength = cpu_to_le32(24); 5613 break; 5614 } 5615 case FS_FULL_SIZE_INFORMATION: 5616 { 5617 struct smb2_fs_full_size_info *info; 5618 5619 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5620 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5621 info->CallerAvailableAllocationUnits = 5622 cpu_to_le64(stfs.f_bavail); 5623 info->ActualAvailableAllocationUnits = 5624 cpu_to_le64(stfs.f_bfree); 5625 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5626 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5627 rsp->OutputBufferLength = cpu_to_le32(32); 5628 break; 5629 } 5630 case FS_OBJECT_ID_INFORMATION: 5631 { 5632 struct object_id_info *info; 5633 5634 info = (struct object_id_info *)(rsp->Buffer); 5635 5636 if (path.mnt->mnt_sb->s_uuid_len == 16) 5637 memcpy(info->objid, path.mnt->mnt_sb->s_uuid.b, 5638 path.mnt->mnt_sb->s_uuid_len); 5639 else 5640 memcpy(info->objid, &stfs.f_fsid, sizeof(stfs.f_fsid)); 5641 5642 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5643 info->extended_info.version = cpu_to_le32(1); 5644 info->extended_info.release = cpu_to_le32(1); 5645 info->extended_info.rel_date = 0; 5646 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5647 rsp->OutputBufferLength = cpu_to_le32(64); 5648 break; 5649 } 5650 case FS_SECTOR_SIZE_INFORMATION: 5651 { 5652 struct smb3_fs_ss_info *info; 5653 unsigned int sector_size = 5654 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5655 5656 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5657 5658 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5659 info->PhysicalBytesPerSectorForAtomicity = 5660 cpu_to_le32(sector_size); 5661 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5662 info->FSEffPhysicalBytesPerSectorForAtomicity = 5663 cpu_to_le32(sector_size); 5664 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5665 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5666 info->ByteOffsetForSectorAlignment = 0; 5667 info->ByteOffsetForPartitionAlignment = 0; 5668 rsp->OutputBufferLength = cpu_to_le32(28); 5669 break; 5670 } 5671 case FS_CONTROL_INFORMATION: 5672 { 5673 /* 5674 * TODO : The current implementation is based on 5675 * test result with win7(NTFS) server. It's need to 5676 * modify this to get valid Quota values 5677 * from Linux kernel 5678 */ 5679 struct smb2_fs_control_info *info; 5680 5681 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5682 info->FreeSpaceStartFiltering = 0; 5683 info->FreeSpaceThreshold = 0; 5684 info->FreeSpaceStopFiltering = 0; 5685 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5686 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5687 info->Padding = 0; 5688 rsp->OutputBufferLength = cpu_to_le32(48); 5689 break; 5690 } 5691 case FS_POSIX_INFORMATION: 5692 { 5693 FILE_SYSTEM_POSIX_INFO *info; 5694 5695 if (!work->tcon->posix_extensions) { 5696 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5697 path_put(&path); 5698 return -EOPNOTSUPP; 5699 } else { 5700 info = (FILE_SYSTEM_POSIX_INFO *)(rsp->Buffer); 5701 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5702 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5703 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5704 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5705 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5706 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5707 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5708 rsp->OutputBufferLength = cpu_to_le32(56); 5709 } 5710 break; 5711 } 5712 default: 5713 path_put(&path); 5714 return -EOPNOTSUPP; 5715 } 5716 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5717 rsp, work->response_buf); 5718 path_put(&path); 5719 5720 if (!rc) 5721 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5722 offsetof(struct smb2_query_info_rsp, Buffer) + 5723 le32_to_cpu(rsp->OutputBufferLength)); 5724 return rc; 5725 } 5726 5727 static int smb2_get_info_sec(struct ksmbd_work *work, 5728 struct smb2_query_info_req *req, 5729 struct smb2_query_info_rsp *rsp) 5730 { 5731 struct ksmbd_file *fp; 5732 struct mnt_idmap *idmap; 5733 struct smb_ntsd *pntsd = NULL, *ppntsd = NULL; 5734 struct smb_fattr fattr = {{0}}; 5735 struct inode *inode; 5736 __u32 secdesclen = 0; 5737 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5738 int addition_info = le32_to_cpu(req->AdditionalInformation); 5739 int rc = 0, ppntsd_size = 0, max_len; 5740 size_t scratch_len = 0; 5741 5742 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5743 PROTECTED_DACL_SECINFO | 5744 UNPROTECTED_DACL_SECINFO)) { 5745 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5746 addition_info); 5747 5748 pntsd = kzalloc(ALIGN(sizeof(struct smb_ntsd), 8), 5749 KSMBD_DEFAULT_GFP); 5750 if (!pntsd) 5751 return -ENOMEM; 5752 5753 pntsd->revision = cpu_to_le16(1); 5754 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5755 pntsd->osidoffset = 0; 5756 pntsd->gsidoffset = 0; 5757 pntsd->sacloffset = 0; 5758 pntsd->dacloffset = 0; 5759 5760 secdesclen = sizeof(struct smb_ntsd); 5761 goto iov_pin; 5762 } 5763 5764 if (work->next_smb2_rcv_hdr_off) { 5765 if (!has_file_id(req->VolatileFileId)) { 5766 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5767 work->compound_fid); 5768 id = work->compound_fid; 5769 pid = work->compound_pfid; 5770 } 5771 } 5772 5773 if (!has_file_id(id)) { 5774 id = req->VolatileFileId; 5775 pid = req->PersistentFileId; 5776 } 5777 5778 fp = ksmbd_lookup_fd_slow(work, id, pid); 5779 if (!fp) 5780 return -ENOENT; 5781 5782 idmap = file_mnt_idmap(fp->filp); 5783 inode = file_inode(fp->filp); 5784 ksmbd_acls_fattr(&fattr, idmap, inode); 5785 5786 if (test_share_config_flag(work->tcon->share_conf, 5787 KSMBD_SHARE_FLAG_ACL_XATTR)) 5788 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5789 fp->filp->f_path.dentry, 5790 &ppntsd); 5791 5792 /* Check if sd buffer size exceeds response buffer size */ 5793 max_len = smb2_calc_max_out_buf_len(work, 5794 offsetof(struct smb2_query_info_rsp, Buffer), 5795 le32_to_cpu(req->OutputBufferLength)); 5796 if (max_len < 0) { 5797 rc = -EINVAL; 5798 goto release_acl; 5799 } 5800 5801 scratch_len = smb_acl_sec_desc_scratch_len(&fattr, ppntsd, 5802 ppntsd_size, addition_info); 5803 if (!scratch_len || scratch_len == SIZE_MAX) { 5804 rc = -EFBIG; 5805 goto release_acl; 5806 } 5807 5808 pntsd = kvzalloc(scratch_len, KSMBD_DEFAULT_GFP); 5809 if (!pntsd) { 5810 rc = -ENOMEM; 5811 goto release_acl; 5812 } 5813 5814 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5815 addition_info, &secdesclen, &fattr); 5816 5817 release_acl: 5818 posix_acl_release(fattr.cf_acls); 5819 posix_acl_release(fattr.cf_dacls); 5820 kfree(ppntsd); 5821 ksmbd_fd_put(work, fp); 5822 5823 if (!rc && ALIGN(secdesclen, 8) > scratch_len) 5824 rc = -EFBIG; 5825 if (rc) 5826 goto err_out; 5827 5828 iov_pin: 5829 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5830 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5831 rsp, work->response_buf); 5832 if (rc) 5833 goto err_out; 5834 5835 rc = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 5836 offsetof(struct smb2_query_info_rsp, Buffer), 5837 pntsd, secdesclen); 5838 err_out: 5839 if (rc) { 5840 rsp->OutputBufferLength = 0; 5841 kvfree(pntsd); 5842 } 5843 5844 return rc; 5845 } 5846 5847 /** 5848 * smb2_query_info() - handler for smb2 query info command 5849 * @work: smb work containing query info request buffer 5850 * 5851 * Return: 0 on success, otherwise error 5852 */ 5853 int smb2_query_info(struct ksmbd_work *work) 5854 { 5855 struct smb2_query_info_req *req; 5856 struct smb2_query_info_rsp *rsp; 5857 int rc = 0; 5858 5859 ksmbd_debug(SMB, "Received request smb2 query info request\n"); 5860 5861 WORK_BUFFERS(work, req, rsp); 5862 5863 if (ksmbd_override_fsids(work)) { 5864 rc = -ENOMEM; 5865 goto err_out; 5866 } 5867 5868 rsp->StructureSize = cpu_to_le16(9); 5869 rsp->OutputBufferOffset = cpu_to_le16(72); 5870 5871 switch (req->InfoType) { 5872 case SMB2_O_INFO_FILE: 5873 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5874 rc = smb2_get_info_file(work, req, rsp); 5875 break; 5876 case SMB2_O_INFO_FILESYSTEM: 5877 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5878 rc = smb2_get_info_filesystem(work, req, rsp); 5879 break; 5880 case SMB2_O_INFO_SECURITY: 5881 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5882 rc = smb2_get_info_sec(work, req, rsp); 5883 break; 5884 default: 5885 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5886 req->InfoType); 5887 rc = -EOPNOTSUPP; 5888 } 5889 ksmbd_revert_fsids(work); 5890 5891 err_out: 5892 if (rc < 0) { 5893 if (rc == -EACCES) 5894 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5895 else if (rc == -ENOENT) 5896 rsp->hdr.Status = STATUS_FILE_CLOSED; 5897 else if (rc == -EIO) 5898 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5899 else if (rc == -ENOMEM) 5900 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5901 else if (rc == -EINVAL && rsp->hdr.Status == 0) 5902 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5903 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5904 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5905 smb2_set_err_rsp(work); 5906 5907 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5908 rc); 5909 return rc; 5910 } 5911 return 0; 5912 } 5913 5914 /** 5915 * smb2_close_pipe() - handler for closing IPC pipe 5916 * @work: smb work containing close request buffer 5917 * 5918 * Return: 0 5919 */ 5920 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5921 { 5922 u64 id; 5923 struct smb2_close_req *req; 5924 struct smb2_close_rsp *rsp; 5925 5926 WORK_BUFFERS(work, req, rsp); 5927 5928 id = req->VolatileFileId; 5929 ksmbd_session_rpc_close(work->sess, id); 5930 5931 rsp->StructureSize = cpu_to_le16(60); 5932 rsp->Flags = 0; 5933 rsp->Reserved = 0; 5934 rsp->CreationTime = 0; 5935 rsp->LastAccessTime = 0; 5936 rsp->LastWriteTime = 0; 5937 rsp->ChangeTime = 0; 5938 rsp->AllocationSize = 0; 5939 rsp->EndOfFile = 0; 5940 rsp->Attributes = 0; 5941 5942 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5943 sizeof(struct smb2_close_rsp)); 5944 } 5945 5946 /** 5947 * smb2_close() - handler for smb2 close file command 5948 * @work: smb work containing close request buffer 5949 * 5950 * Return: 0 on success, otherwise error 5951 */ 5952 int smb2_close(struct ksmbd_work *work) 5953 { 5954 u64 volatile_id = KSMBD_NO_FID; 5955 u64 sess_id; 5956 struct smb2_close_req *req; 5957 struct smb2_close_rsp *rsp; 5958 struct ksmbd_conn *conn = work->conn; 5959 struct ksmbd_file *fp; 5960 u64 time; 5961 int err = 0; 5962 5963 ksmbd_debug(SMB, "Received smb2 close request\n"); 5964 5965 WORK_BUFFERS(work, req, rsp); 5966 5967 if (test_share_config_flag(work->tcon->share_conf, 5968 KSMBD_SHARE_FLAG_PIPE)) { 5969 ksmbd_debug(SMB, "IPC pipe close request\n"); 5970 return smb2_close_pipe(work); 5971 } 5972 5973 sess_id = le64_to_cpu(req->hdr.SessionId); 5974 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5975 sess_id = work->compound_sid; 5976 5977 work->compound_sid = 0; 5978 if (check_session_id(conn, sess_id)) { 5979 work->compound_sid = sess_id; 5980 } else { 5981 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5982 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5983 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5984 err = -EBADF; 5985 goto out; 5986 } 5987 5988 if (work->next_smb2_rcv_hdr_off && 5989 !has_file_id(req->VolatileFileId)) { 5990 if (!has_file_id(work->compound_fid)) { 5991 /* file already closed, return FILE_CLOSED */ 5992 ksmbd_debug(SMB, "file already closed\n"); 5993 rsp->hdr.Status = STATUS_FILE_CLOSED; 5994 err = -EBADF; 5995 goto out; 5996 } else { 5997 ksmbd_debug(SMB, 5998 "Compound request set FID = %llu:%llu\n", 5999 work->compound_fid, 6000 work->compound_pfid); 6001 volatile_id = work->compound_fid; 6002 6003 /* file closed, stored id is not valid anymore */ 6004 work->compound_fid = KSMBD_NO_FID; 6005 work->compound_pfid = KSMBD_NO_FID; 6006 } 6007 } else { 6008 volatile_id = req->VolatileFileId; 6009 } 6010 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 6011 6012 rsp->StructureSize = cpu_to_le16(60); 6013 rsp->Reserved = 0; 6014 6015 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 6016 struct kstat stat; 6017 int ret; 6018 6019 fp = ksmbd_lookup_fd_fast(work, volatile_id); 6020 if (!fp) { 6021 err = -ENOENT; 6022 goto out; 6023 } 6024 6025 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6026 AT_STATX_SYNC_AS_STAT); 6027 if (ret) { 6028 ksmbd_fd_put(work, fp); 6029 goto out; 6030 } 6031 6032 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 6033 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 6034 cpu_to_le64(stat.blocks << 9); 6035 rsp->EndOfFile = cpu_to_le64(stat.size); 6036 rsp->Attributes = fp->f_ci->m_fattr; 6037 rsp->CreationTime = cpu_to_le64(fp->create_time); 6038 time = ksmbd_UnixTimeToNT(stat.atime); 6039 rsp->LastAccessTime = cpu_to_le64(time); 6040 time = ksmbd_UnixTimeToNT(stat.mtime); 6041 rsp->LastWriteTime = cpu_to_le64(time); 6042 time = ksmbd_UnixTimeToNT(stat.ctime); 6043 rsp->ChangeTime = cpu_to_le64(time); 6044 ksmbd_fd_put(work, fp); 6045 } else { 6046 rsp->Flags = 0; 6047 rsp->AllocationSize = 0; 6048 rsp->EndOfFile = 0; 6049 rsp->Attributes = 0; 6050 rsp->CreationTime = 0; 6051 rsp->LastAccessTime = 0; 6052 rsp->LastWriteTime = 0; 6053 rsp->ChangeTime = 0; 6054 } 6055 6056 err = ksmbd_close_fd(work, volatile_id); 6057 out: 6058 if (!err) 6059 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6060 sizeof(struct smb2_close_rsp)); 6061 6062 if (err) { 6063 if (rsp->hdr.Status == 0) 6064 rsp->hdr.Status = STATUS_FILE_CLOSED; 6065 smb2_set_err_rsp(work); 6066 } 6067 6068 return err; 6069 } 6070 6071 /** 6072 * smb2_echo() - handler for smb2 echo(ping) command 6073 * @work: smb work containing echo request buffer 6074 * 6075 * Return: 0 on success, otherwise error 6076 */ 6077 int smb2_echo(struct ksmbd_work *work) 6078 { 6079 struct smb2_echo_rsp *rsp = smb_get_msg(work->response_buf); 6080 6081 ksmbd_debug(SMB, "Received smb2 echo request\n"); 6082 6083 if (work->next_smb2_rcv_hdr_off) 6084 rsp = ksmbd_resp_buf_next(work); 6085 6086 rsp->StructureSize = cpu_to_le16(4); 6087 rsp->Reserved = 0; 6088 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 6089 } 6090 6091 static int smb2_rename(struct ksmbd_work *work, 6092 struct ksmbd_file *fp, 6093 struct smb2_file_rename_info *file_info, 6094 struct nls_table *local_nls) 6095 { 6096 struct ksmbd_share_config *share = fp->tcon->share_conf; 6097 char *new_name = NULL; 6098 int rc, flags = 0; 6099 6100 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 6101 new_name = smb2_get_name(file_info->FileName, 6102 le32_to_cpu(file_info->FileNameLength), 6103 local_nls); 6104 if (IS_ERR(new_name)) 6105 return PTR_ERR(new_name); 6106 6107 if (fp->is_posix_ctxt == false && strchr(new_name, ':')) { 6108 int s_type; 6109 char *xattr_stream_name, *stream_name = NULL; 6110 size_t xattr_stream_size; 6111 int len; 6112 6113 rc = parse_stream_name(new_name, &stream_name, &s_type); 6114 if (rc < 0) 6115 goto out; 6116 6117 len = strlen(new_name); 6118 if (len > 0 && new_name[len - 1] != '/') { 6119 pr_err("not allow base filename in rename\n"); 6120 rc = -ESHARE; 6121 goto out; 6122 } 6123 6124 rc = ksmbd_vfs_xattr_stream_name(stream_name, 6125 &xattr_stream_name, 6126 &xattr_stream_size, 6127 s_type); 6128 if (rc) 6129 goto out; 6130 6131 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 6132 &fp->filp->f_path, 6133 xattr_stream_name, 6134 NULL, 0, 0, true); 6135 if (rc < 0) { 6136 pr_err("failed to store stream name in xattr: %d\n", 6137 rc); 6138 rc = -EINVAL; 6139 goto out; 6140 } 6141 6142 goto out; 6143 } 6144 6145 ksmbd_debug(SMB, "new name %s\n", new_name); 6146 if (ksmbd_share_veto_filename(share, new_name)) { 6147 rc = -ENOENT; 6148 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 6149 goto out; 6150 } 6151 6152 if (!file_info->ReplaceIfExists) 6153 flags = RENAME_NOREPLACE; 6154 6155 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 6156 if (!rc) 6157 smb_break_all_levII_oplock(work, fp, 0); 6158 out: 6159 kfree(new_name); 6160 return rc; 6161 } 6162 6163 static int smb2_create_link(struct ksmbd_work *work, 6164 struct ksmbd_share_config *share, 6165 struct smb2_file_link_info *file_info, 6166 unsigned int buf_len, struct file *filp, 6167 struct nls_table *local_nls) 6168 { 6169 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 6170 struct path path; 6171 int rc; 6172 6173 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 6174 le32_to_cpu(file_info->FileNameLength)) 6175 return -EINVAL; 6176 6177 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 6178 pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP); 6179 if (!pathname) 6180 return -ENOMEM; 6181 6182 link_name = smb2_get_name(file_info->FileName, 6183 le32_to_cpu(file_info->FileNameLength), 6184 local_nls); 6185 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 6186 rc = -EINVAL; 6187 goto out; 6188 } 6189 6190 ksmbd_debug(SMB, "link name is %s\n", link_name); 6191 target_name = file_path(filp, pathname, PATH_MAX); 6192 if (IS_ERR(target_name)) { 6193 rc = -EINVAL; 6194 goto out; 6195 } 6196 6197 ksmbd_debug(SMB, "target name is %s\n", target_name); 6198 rc = ksmbd_vfs_kern_path_start_removing(work, link_name, LOOKUP_NO_SYMLINKS, 6199 &path, 0); 6200 if (rc) { 6201 if (rc != -ENOENT) 6202 goto out; 6203 } else { 6204 if (file_info->ReplaceIfExists) { 6205 rc = ksmbd_vfs_remove_file(work, &path); 6206 if (rc) { 6207 rc = -EINVAL; 6208 ksmbd_debug(SMB, "cannot delete %s\n", 6209 link_name); 6210 } 6211 } else { 6212 rc = -EEXIST; 6213 ksmbd_debug(SMB, "link already exists\n"); 6214 } 6215 ksmbd_vfs_kern_path_end_removing(&path); 6216 if (rc) 6217 goto out; 6218 } 6219 rc = ksmbd_vfs_link(work, target_name, link_name); 6220 if (rc) 6221 rc = -EINVAL; 6222 out: 6223 6224 if (!IS_ERR(link_name)) 6225 kfree(link_name); 6226 kfree(pathname); 6227 return rc; 6228 } 6229 6230 static int set_file_basic_info(struct ksmbd_file *fp, 6231 struct file_basic_info *file_info, 6232 struct ksmbd_share_config *share) 6233 { 6234 struct iattr attrs; 6235 struct file *filp; 6236 struct inode *inode; 6237 struct mnt_idmap *idmap; 6238 int rc = 0; 6239 6240 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 6241 return -EACCES; 6242 6243 attrs.ia_valid = 0; 6244 filp = fp->filp; 6245 inode = file_inode(filp); 6246 idmap = file_mnt_idmap(filp); 6247 6248 if (file_info->CreationTime) 6249 fp->create_time = le64_to_cpu(file_info->CreationTime); 6250 6251 if (file_info->LastAccessTime) { 6252 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 6253 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 6254 } 6255 6256 if (file_info->ChangeTime) 6257 inode_set_ctime_to_ts(inode, 6258 ksmbd_NTtimeToUnix(file_info->ChangeTime)); 6259 6260 if (file_info->LastWriteTime) { 6261 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 6262 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME); 6263 } 6264 6265 if (file_info->Attributes) { 6266 if (!S_ISDIR(inode->i_mode) && 6267 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 6268 pr_err("can't change a file to a directory\n"); 6269 return -EINVAL; 6270 } 6271 6272 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 6273 fp->f_ci->m_fattr = file_info->Attributes | 6274 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 6275 } 6276 6277 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 6278 (file_info->CreationTime || file_info->Attributes)) { 6279 struct xattr_dos_attrib da = {0}; 6280 6281 da.version = 4; 6282 da.itime = fp->itime; 6283 da.create_time = fp->create_time; 6284 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 6285 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 6286 XATTR_DOSINFO_ITIME; 6287 6288 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 6289 true); 6290 if (rc) 6291 ksmbd_debug(SMB, 6292 "failed to restore file attribute in EA\n"); 6293 rc = 0; 6294 } 6295 6296 if (attrs.ia_valid) { 6297 struct dentry *dentry = filp->f_path.dentry; 6298 struct inode *inode = d_inode(dentry); 6299 6300 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 6301 return -EACCES; 6302 6303 inode_lock(inode); 6304 rc = notify_change(idmap, dentry, &attrs, NULL); 6305 inode_unlock(inode); 6306 } 6307 return rc; 6308 } 6309 6310 static int set_file_allocation_info(struct ksmbd_work *work, 6311 struct ksmbd_file *fp, 6312 struct smb2_file_alloc_info *file_alloc_info) 6313 { 6314 /* 6315 * TODO : It's working fine only when store dos attributes 6316 * is not yes. need to implement a logic which works 6317 * properly with any smb.conf option 6318 */ 6319 6320 loff_t alloc_blks; 6321 struct inode *inode; 6322 struct kstat stat; 6323 int rc; 6324 6325 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6326 return -EACCES; 6327 6328 if (ksmbd_stream_fd(fp) == true) 6329 return 0; 6330 6331 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6332 AT_STATX_SYNC_AS_STAT); 6333 if (rc) 6334 return rc; 6335 6336 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 6337 inode = file_inode(fp->filp); 6338 6339 if (alloc_blks > stat.blocks) { 6340 smb_break_all_levII_oplock(work, fp, 1); 6341 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 6342 alloc_blks * 512); 6343 if (rc && rc != -EOPNOTSUPP) { 6344 pr_err("vfs_fallocate is failed : %d\n", rc); 6345 return rc; 6346 } 6347 } else if (alloc_blks < stat.blocks) { 6348 loff_t size; 6349 6350 /* 6351 * Allocation size could be smaller than original one 6352 * which means allocated blocks in file should be 6353 * deallocated. use truncate to cut out it, but inode 6354 * size is also updated with truncate offset. 6355 * inode size is retained by backup inode size. 6356 */ 6357 size = i_size_read(inode); 6358 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 6359 if (rc) { 6360 pr_err("truncate failed!, err %d\n", rc); 6361 return rc; 6362 } 6363 if (size < alloc_blks * 512) 6364 i_size_write(inode, size); 6365 } 6366 return 0; 6367 } 6368 6369 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6370 struct smb2_file_eof_info *file_eof_info) 6371 { 6372 loff_t newsize; 6373 struct inode *inode; 6374 int rc; 6375 6376 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6377 return -EACCES; 6378 6379 newsize = le64_to_cpu(file_eof_info->EndOfFile); 6380 inode = file_inode(fp->filp); 6381 6382 /* 6383 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 6384 * on FAT32 shared device, truncate execution time is too long 6385 * and network error could cause from windows client. because 6386 * truncate of some filesystem like FAT32 fill zero data in 6387 * truncated range. 6388 */ 6389 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC && 6390 ksmbd_stream_fd(fp) == false) { 6391 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 6392 rc = ksmbd_vfs_truncate(work, fp, newsize); 6393 if (rc) { 6394 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 6395 if (rc != -EAGAIN) 6396 rc = -EBADF; 6397 return rc; 6398 } 6399 } 6400 return 0; 6401 } 6402 6403 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6404 struct smb2_file_rename_info *rename_info, 6405 unsigned int buf_len) 6406 { 6407 if (!(fp->daccess & FILE_DELETE_LE)) { 6408 pr_err("no right to delete : 0x%x\n", fp->daccess); 6409 return -EACCES; 6410 } 6411 6412 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 6413 le32_to_cpu(rename_info->FileNameLength)) 6414 return -EINVAL; 6415 6416 if (!le32_to_cpu(rename_info->FileNameLength)) 6417 return -EINVAL; 6418 6419 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 6420 } 6421 6422 static int set_file_disposition_info(struct ksmbd_file *fp, 6423 struct smb2_file_disposition_info *file_info) 6424 { 6425 struct inode *inode; 6426 6427 if (!(fp->daccess & FILE_DELETE_LE)) { 6428 pr_err("no right to delete : 0x%x\n", fp->daccess); 6429 return -EACCES; 6430 } 6431 6432 inode = file_inode(fp->filp); 6433 if (file_info->DeletePending) { 6434 if (S_ISDIR(inode->i_mode) && 6435 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 6436 return -EBUSY; 6437 ksmbd_set_inode_pending_delete(fp); 6438 } else { 6439 ksmbd_clear_inode_pending_delete(fp); 6440 } 6441 return 0; 6442 } 6443 6444 static int set_file_position_info(struct ksmbd_file *fp, 6445 struct smb2_file_pos_info *file_info) 6446 { 6447 loff_t current_byte_offset; 6448 unsigned long sector_size; 6449 struct inode *inode; 6450 6451 inode = file_inode(fp->filp); 6452 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 6453 sector_size = inode->i_sb->s_blocksize; 6454 6455 if (current_byte_offset < 0 || 6456 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 6457 current_byte_offset & (sector_size - 1))) { 6458 pr_err("CurrentByteOffset is not valid : %llu\n", 6459 current_byte_offset); 6460 return -EINVAL; 6461 } 6462 6463 if (ksmbd_stream_fd(fp) == false) 6464 fp->filp->f_pos = current_byte_offset; 6465 else { 6466 if (current_byte_offset > XATTR_SIZE_MAX) 6467 current_byte_offset = XATTR_SIZE_MAX; 6468 fp->stream.pos = current_byte_offset; 6469 } 6470 return 0; 6471 } 6472 6473 static int set_file_mode_info(struct ksmbd_file *fp, 6474 struct smb2_file_mode_info *file_info) 6475 { 6476 __le32 mode; 6477 6478 mode = file_info->Mode; 6479 6480 if ((mode & ~FILE_MODE_INFO_MASK)) { 6481 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 6482 return -EINVAL; 6483 } 6484 6485 /* 6486 * TODO : need to implement consideration for 6487 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 6488 */ 6489 ksmbd_vfs_set_fadvise(fp->filp, mode); 6490 fp->coption = mode; 6491 return 0; 6492 } 6493 6494 /** 6495 * smb2_set_info_file() - handler for smb2 set info command 6496 * @work: smb work containing set info command buffer 6497 * @fp: ksmbd_file pointer 6498 * @req: request buffer pointer 6499 * @share: ksmbd_share_config pointer 6500 * 6501 * Return: 0 on success, otherwise error 6502 */ 6503 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 6504 struct smb2_set_info_req *req, 6505 struct ksmbd_share_config *share) 6506 { 6507 unsigned int buf_len = le32_to_cpu(req->BufferLength); 6508 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); 6509 6510 switch (req->FileInfoClass) { 6511 case FILE_BASIC_INFORMATION: 6512 { 6513 if (buf_len < sizeof(struct file_basic_info)) 6514 return -EMSGSIZE; 6515 6516 return set_file_basic_info(fp, (struct file_basic_info *)buffer, share); 6517 } 6518 case FILE_ALLOCATION_INFORMATION: 6519 { 6520 if (buf_len < sizeof(struct smb2_file_alloc_info)) 6521 return -EMSGSIZE; 6522 6523 return set_file_allocation_info(work, fp, 6524 (struct smb2_file_alloc_info *)buffer); 6525 } 6526 case FILE_END_OF_FILE_INFORMATION: 6527 { 6528 if (buf_len < sizeof(struct smb2_file_eof_info)) 6529 return -EMSGSIZE; 6530 6531 return set_end_of_file_info(work, fp, 6532 (struct smb2_file_eof_info *)buffer); 6533 } 6534 case FILE_RENAME_INFORMATION: 6535 { 6536 if (buf_len < sizeof(struct smb2_file_rename_info)) 6537 return -EMSGSIZE; 6538 6539 return set_rename_info(work, fp, 6540 (struct smb2_file_rename_info *)buffer, 6541 buf_len); 6542 } 6543 case FILE_LINK_INFORMATION: 6544 { 6545 if (buf_len < sizeof(struct smb2_file_link_info)) 6546 return -EMSGSIZE; 6547 6548 return smb2_create_link(work, work->tcon->share_conf, 6549 (struct smb2_file_link_info *)buffer, 6550 buf_len, fp->filp, 6551 work->conn->local_nls); 6552 } 6553 case FILE_DISPOSITION_INFORMATION: 6554 { 6555 if (buf_len < sizeof(struct smb2_file_disposition_info)) 6556 return -EMSGSIZE; 6557 6558 return set_file_disposition_info(fp, 6559 (struct smb2_file_disposition_info *)buffer); 6560 } 6561 case FILE_FULL_EA_INFORMATION: 6562 { 6563 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 6564 pr_err("Not permitted to write ext attr: 0x%x\n", 6565 fp->daccess); 6566 return -EACCES; 6567 } 6568 6569 if (buf_len < sizeof(struct smb2_ea_info)) 6570 return -EMSGSIZE; 6571 6572 return smb2_set_ea((struct smb2_ea_info *)buffer, 6573 buf_len, &fp->filp->f_path, true); 6574 } 6575 case FILE_POSITION_INFORMATION: 6576 { 6577 if (buf_len < sizeof(struct smb2_file_pos_info)) 6578 return -EMSGSIZE; 6579 6580 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); 6581 } 6582 case FILE_MODE_INFORMATION: 6583 { 6584 if (buf_len < sizeof(struct smb2_file_mode_info)) 6585 return -EMSGSIZE; 6586 6587 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); 6588 } 6589 } 6590 6591 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6592 return -EOPNOTSUPP; 6593 } 6594 6595 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6596 char *buffer, int buf_len) 6597 { 6598 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6599 6600 fp->saccess |= FILE_SHARE_DELETE_LE; 6601 6602 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6603 buf_len, false, true); 6604 } 6605 6606 /** 6607 * smb2_set_info() - handler for smb2 set info command handler 6608 * @work: smb work containing set info request buffer 6609 * 6610 * Return: 0 on success, otherwise error 6611 */ 6612 int smb2_set_info(struct ksmbd_work *work) 6613 { 6614 struct smb2_set_info_req *req; 6615 struct smb2_set_info_rsp *rsp; 6616 struct ksmbd_file *fp = NULL; 6617 int rc = 0; 6618 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6619 6620 ksmbd_debug(SMB, "Received smb2 set info request\n"); 6621 6622 if (work->next_smb2_rcv_hdr_off) { 6623 req = ksmbd_req_buf_next(work); 6624 rsp = ksmbd_resp_buf_next(work); 6625 if (!has_file_id(req->VolatileFileId)) { 6626 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6627 work->compound_fid); 6628 id = work->compound_fid; 6629 pid = work->compound_pfid; 6630 } 6631 } else { 6632 req = smb_get_msg(work->request_buf); 6633 rsp = smb_get_msg(work->response_buf); 6634 } 6635 6636 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6637 ksmbd_debug(SMB, "User does not have write permission\n"); 6638 pr_err("User does not have write permission\n"); 6639 rc = -EACCES; 6640 goto err_out; 6641 } 6642 6643 if (!has_file_id(id)) { 6644 id = req->VolatileFileId; 6645 pid = req->PersistentFileId; 6646 } 6647 6648 fp = ksmbd_lookup_fd_slow(work, id, pid); 6649 if (!fp) { 6650 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6651 rc = -ENOENT; 6652 goto err_out; 6653 } 6654 6655 switch (req->InfoType) { 6656 case SMB2_O_INFO_FILE: 6657 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6658 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6659 break; 6660 case SMB2_O_INFO_SECURITY: 6661 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6662 if (ksmbd_override_fsids(work)) { 6663 rc = -ENOMEM; 6664 goto err_out; 6665 } 6666 rc = smb2_set_info_sec(fp, 6667 le32_to_cpu(req->AdditionalInformation), 6668 (char *)req + le16_to_cpu(req->BufferOffset), 6669 le32_to_cpu(req->BufferLength)); 6670 ksmbd_revert_fsids(work); 6671 break; 6672 default: 6673 rc = -EOPNOTSUPP; 6674 } 6675 6676 if (rc < 0) 6677 goto err_out; 6678 6679 rsp->StructureSize = cpu_to_le16(2); 6680 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6681 sizeof(struct smb2_set_info_rsp)); 6682 if (rc) 6683 goto err_out; 6684 ksmbd_fd_put(work, fp); 6685 return 0; 6686 6687 err_out: 6688 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6689 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6690 else if (rc == -EINVAL) 6691 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6692 else if (rc == -EMSGSIZE) 6693 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 6694 else if (rc == -ESHARE) 6695 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6696 else if (rc == -ENOENT) 6697 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6698 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6699 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6700 else if (rc == -EAGAIN) 6701 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6702 else if (rc == -EBADF || rc == -ESTALE) 6703 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6704 else if (rc == -EEXIST) 6705 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6706 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6707 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6708 smb2_set_err_rsp(work); 6709 ksmbd_fd_put(work, fp); 6710 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6711 return rc; 6712 } 6713 6714 /** 6715 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6716 * @work: smb work containing read IPC pipe command buffer 6717 * 6718 * Return: 0 on success, otherwise error 6719 */ 6720 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6721 { 6722 int nbytes = 0, err; 6723 u64 id; 6724 struct ksmbd_rpc_command *rpc_resp; 6725 struct smb2_read_req *req; 6726 struct smb2_read_rsp *rsp; 6727 6728 WORK_BUFFERS(work, req, rsp); 6729 6730 id = req->VolatileFileId; 6731 6732 rpc_resp = ksmbd_rpc_read(work->sess, id); 6733 if (rpc_resp) { 6734 void *aux_payload_buf; 6735 6736 if (rpc_resp->flags != KSMBD_RPC_OK) { 6737 err = -EINVAL; 6738 goto out; 6739 } 6740 6741 aux_payload_buf = 6742 kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP); 6743 if (!aux_payload_buf) { 6744 err = -ENOMEM; 6745 goto out; 6746 } 6747 6748 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6749 6750 nbytes = rpc_resp->payload_sz; 6751 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6752 offsetof(struct smb2_read_rsp, Buffer), 6753 aux_payload_buf, nbytes); 6754 if (err) { 6755 kvfree(aux_payload_buf); 6756 goto out; 6757 } 6758 kvfree(rpc_resp); 6759 } else { 6760 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6761 offsetof(struct smb2_read_rsp, Buffer)); 6762 if (err) 6763 goto out; 6764 } 6765 6766 rsp->StructureSize = cpu_to_le16(17); 6767 rsp->DataOffset = 80; 6768 rsp->Reserved = 0; 6769 rsp->DataLength = cpu_to_le32(nbytes); 6770 rsp->DataRemaining = 0; 6771 rsp->Flags = 0; 6772 return 0; 6773 6774 out: 6775 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6776 smb2_set_err_rsp(work); 6777 kvfree(rpc_resp); 6778 return err; 6779 } 6780 6781 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6782 struct smbdirect_buffer_descriptor_v1 *desc, 6783 __le32 Channel, 6784 __le16 ChannelInfoLength) 6785 { 6786 unsigned int i, ch_count; 6787 6788 if (work->conn->dialect == SMB30_PROT_ID && 6789 Channel != SMB2_CHANNEL_RDMA_V1) 6790 return -EINVAL; 6791 6792 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6793 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6794 for (i = 0; i < ch_count; i++) { 6795 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6796 i, 6797 le32_to_cpu(desc[i].token), 6798 le32_to_cpu(desc[i].length)); 6799 } 6800 } 6801 if (!ch_count) 6802 return -EINVAL; 6803 6804 work->need_invalidate_rkey = 6805 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6806 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6807 work->remote_key = le32_to_cpu(desc->token); 6808 return 0; 6809 } 6810 6811 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6812 struct smb2_read_req *req, void *data_buf, 6813 size_t length) 6814 { 6815 int err; 6816 6817 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6818 (struct smbdirect_buffer_descriptor_v1 *) 6819 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6820 le16_to_cpu(req->ReadChannelInfoLength)); 6821 if (err) 6822 return err; 6823 6824 return length; 6825 } 6826 6827 /** 6828 * smb2_read() - handler for smb2 read from file 6829 * @work: smb work containing read command buffer 6830 * 6831 * Return: 0 on success, otherwise error 6832 */ 6833 int smb2_read(struct ksmbd_work *work) 6834 { 6835 struct ksmbd_conn *conn = work->conn; 6836 struct smb2_read_req *req; 6837 struct smb2_read_rsp *rsp; 6838 struct ksmbd_file *fp = NULL; 6839 loff_t offset; 6840 size_t length, mincount; 6841 ssize_t nbytes = 0, remain_bytes = 0; 6842 int err = 0; 6843 bool is_rdma_channel = false; 6844 unsigned int max_read_size = conn->vals->max_read_size; 6845 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6846 void *aux_payload_buf; 6847 6848 ksmbd_debug(SMB, "Received smb2 read request\n"); 6849 6850 if (test_share_config_flag(work->tcon->share_conf, 6851 KSMBD_SHARE_FLAG_PIPE)) { 6852 ksmbd_debug(SMB, "IPC pipe read request\n"); 6853 return smb2_read_pipe(work); 6854 } 6855 6856 if (work->next_smb2_rcv_hdr_off) { 6857 req = ksmbd_req_buf_next(work); 6858 rsp = ksmbd_resp_buf_next(work); 6859 if (!has_file_id(req->VolatileFileId)) { 6860 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6861 work->compound_fid); 6862 id = work->compound_fid; 6863 pid = work->compound_pfid; 6864 } 6865 } else { 6866 req = smb_get_msg(work->request_buf); 6867 rsp = smb_get_msg(work->response_buf); 6868 } 6869 6870 if (!has_file_id(id)) { 6871 id = req->VolatileFileId; 6872 pid = req->PersistentFileId; 6873 } 6874 6875 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6876 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6877 is_rdma_channel = true; 6878 max_read_size = get_smbd_max_read_write_size(work->conn->transport); 6879 if (max_read_size == 0) { 6880 err = -EINVAL; 6881 goto out; 6882 } 6883 } 6884 6885 if (is_rdma_channel == true) { 6886 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6887 6888 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6889 err = -EINVAL; 6890 goto out; 6891 } 6892 err = smb2_set_remote_key_for_rdma(work, 6893 (struct smbdirect_buffer_descriptor_v1 *) 6894 ((char *)req + ch_offset), 6895 req->Channel, 6896 req->ReadChannelInfoLength); 6897 if (err) 6898 goto out; 6899 } 6900 6901 fp = ksmbd_lookup_fd_slow(work, id, pid); 6902 if (!fp) { 6903 err = -ENOENT; 6904 goto out; 6905 } 6906 6907 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6908 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6909 err = -EACCES; 6910 goto out; 6911 } 6912 6913 offset = le64_to_cpu(req->Offset); 6914 if (offset < 0) { 6915 err = -EINVAL; 6916 goto out; 6917 } 6918 length = le32_to_cpu(req->Length); 6919 mincount = le32_to_cpu(req->MinimumCount); 6920 6921 if (length > max_read_size) { 6922 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6923 max_read_size); 6924 err = -EINVAL; 6925 goto out; 6926 } 6927 6928 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6929 fp->filp, offset, length); 6930 6931 aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP); 6932 if (!aux_payload_buf) { 6933 err = -ENOMEM; 6934 goto out; 6935 } 6936 6937 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6938 if (nbytes < 0) { 6939 kvfree(aux_payload_buf); 6940 err = nbytes; 6941 goto out; 6942 } 6943 6944 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6945 kvfree(aux_payload_buf); 6946 rsp->hdr.Status = STATUS_END_OF_FILE; 6947 smb2_set_err_rsp(work); 6948 ksmbd_fd_put(work, fp); 6949 return -ENODATA; 6950 } 6951 6952 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6953 nbytes, offset, mincount); 6954 6955 if (is_rdma_channel == true) { 6956 /* write data to the client using rdma channel */ 6957 remain_bytes = smb2_read_rdma_channel(work, req, 6958 aux_payload_buf, 6959 nbytes); 6960 kvfree(aux_payload_buf); 6961 aux_payload_buf = NULL; 6962 nbytes = 0; 6963 if (remain_bytes < 0) { 6964 err = (int)remain_bytes; 6965 goto out; 6966 } 6967 } 6968 6969 rsp->StructureSize = cpu_to_le16(17); 6970 rsp->DataOffset = 80; 6971 rsp->Reserved = 0; 6972 rsp->DataLength = cpu_to_le32(nbytes); 6973 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6974 rsp->Flags = 0; 6975 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6976 offsetof(struct smb2_read_rsp, Buffer), 6977 aux_payload_buf, nbytes); 6978 if (err) { 6979 kvfree(aux_payload_buf); 6980 goto out; 6981 } 6982 ksmbd_fd_put(work, fp); 6983 return 0; 6984 6985 out: 6986 if (err) { 6987 if (err == -EISDIR) 6988 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6989 else if (err == -EAGAIN) 6990 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6991 else if (err == -ENOENT) 6992 rsp->hdr.Status = STATUS_FILE_CLOSED; 6993 else if (err == -EACCES) 6994 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6995 else if (err == -ESHARE) 6996 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6997 else if (err == -EINVAL) 6998 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6999 else 7000 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7001 7002 smb2_set_err_rsp(work); 7003 } 7004 ksmbd_fd_put(work, fp); 7005 return err; 7006 } 7007 7008 /** 7009 * smb2_write_pipe() - handler for smb2 write on IPC pipe 7010 * @work: smb work containing write IPC pipe command buffer 7011 * 7012 * Return: 0 on success, otherwise error 7013 */ 7014 static noinline int smb2_write_pipe(struct ksmbd_work *work) 7015 { 7016 struct smb2_write_req *req; 7017 struct smb2_write_rsp *rsp; 7018 struct ksmbd_rpc_command *rpc_resp; 7019 u64 id = 0; 7020 int err = 0, ret = 0; 7021 char *data_buf; 7022 size_t length; 7023 7024 WORK_BUFFERS(work, req, rsp); 7025 7026 length = le32_to_cpu(req->Length); 7027 id = req->VolatileFileId; 7028 7029 if ((u64)le16_to_cpu(req->DataOffset) + length > 7030 get_rfc1002_len(work->request_buf)) { 7031 pr_err("invalid write data offset %u, smb_len %u\n", 7032 le16_to_cpu(req->DataOffset), 7033 get_rfc1002_len(work->request_buf)); 7034 err = -EINVAL; 7035 goto out; 7036 } 7037 7038 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7039 le16_to_cpu(req->DataOffset)); 7040 7041 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 7042 if (rpc_resp) { 7043 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7044 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7045 kvfree(rpc_resp); 7046 smb2_set_err_rsp(work); 7047 return -EOPNOTSUPP; 7048 } 7049 if (rpc_resp->flags != KSMBD_RPC_OK) { 7050 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7051 smb2_set_err_rsp(work); 7052 kvfree(rpc_resp); 7053 return ret; 7054 } 7055 kvfree(rpc_resp); 7056 } 7057 7058 rsp->StructureSize = cpu_to_le16(17); 7059 rsp->DataOffset = 0; 7060 rsp->Reserved = 0; 7061 rsp->DataLength = cpu_to_le32(length); 7062 rsp->DataRemaining = 0; 7063 rsp->Reserved2 = 0; 7064 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 7065 offsetof(struct smb2_write_rsp, Buffer)); 7066 out: 7067 if (err) { 7068 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7069 smb2_set_err_rsp(work); 7070 } 7071 7072 return err; 7073 } 7074 7075 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 7076 struct smb2_write_req *req, 7077 struct ksmbd_file *fp, 7078 loff_t offset, size_t length, bool sync) 7079 { 7080 char *data_buf; 7081 int ret; 7082 ssize_t nbytes; 7083 7084 data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP); 7085 if (!data_buf) 7086 return -ENOMEM; 7087 7088 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 7089 (struct smbdirect_buffer_descriptor_v1 *) 7090 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 7091 le16_to_cpu(req->WriteChannelInfoLength)); 7092 if (ret < 0) { 7093 kvfree(data_buf); 7094 return ret; 7095 } 7096 7097 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 7098 kvfree(data_buf); 7099 if (ret < 0) 7100 return ret; 7101 7102 return nbytes; 7103 } 7104 7105 /** 7106 * smb2_write() - handler for smb2 write from file 7107 * @work: smb work containing write command buffer 7108 * 7109 * Return: 0 on success, otherwise error 7110 */ 7111 int smb2_write(struct ksmbd_work *work) 7112 { 7113 struct smb2_write_req *req; 7114 struct smb2_write_rsp *rsp; 7115 struct ksmbd_file *fp = NULL; 7116 loff_t offset; 7117 size_t length; 7118 ssize_t nbytes; 7119 char *data_buf; 7120 bool writethrough = false, is_rdma_channel = false; 7121 int err = 0; 7122 unsigned int max_write_size = work->conn->vals->max_write_size; 7123 7124 ksmbd_debug(SMB, "Received smb2 write request\n"); 7125 7126 WORK_BUFFERS(work, req, rsp); 7127 7128 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 7129 ksmbd_debug(SMB, "IPC pipe write request\n"); 7130 return smb2_write_pipe(work); 7131 } 7132 7133 offset = le64_to_cpu(req->Offset); 7134 if (offset < 0) 7135 return -EINVAL; 7136 length = le32_to_cpu(req->Length); 7137 7138 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 7139 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 7140 is_rdma_channel = true; 7141 max_write_size = get_smbd_max_read_write_size(work->conn->transport); 7142 if (max_write_size == 0) { 7143 err = -EINVAL; 7144 goto out; 7145 } 7146 length = le32_to_cpu(req->RemainingBytes); 7147 } 7148 7149 if (is_rdma_channel == true) { 7150 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 7151 7152 if (req->Length != 0 || req->DataOffset != 0 || 7153 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 7154 err = -EINVAL; 7155 goto out; 7156 } 7157 err = smb2_set_remote_key_for_rdma(work, 7158 (struct smbdirect_buffer_descriptor_v1 *) 7159 ((char *)req + ch_offset), 7160 req->Channel, 7161 req->WriteChannelInfoLength); 7162 if (err) 7163 goto out; 7164 } 7165 7166 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7167 ksmbd_debug(SMB, "User does not have write permission\n"); 7168 err = -EACCES; 7169 goto out; 7170 } 7171 7172 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7173 if (!fp) { 7174 err = -ENOENT; 7175 goto out; 7176 } 7177 7178 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 7179 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 7180 err = -EACCES; 7181 goto out; 7182 } 7183 7184 if (length > max_write_size) { 7185 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 7186 max_write_size); 7187 err = -EINVAL; 7188 goto out; 7189 } 7190 7191 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 7192 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 7193 writethrough = true; 7194 7195 if (is_rdma_channel == false) { 7196 if (le16_to_cpu(req->DataOffset) < 7197 offsetof(struct smb2_write_req, Buffer)) { 7198 err = -EINVAL; 7199 goto out; 7200 } 7201 7202 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7203 le16_to_cpu(req->DataOffset)); 7204 7205 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 7206 fp->filp, offset, length); 7207 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 7208 writethrough, &nbytes); 7209 if (err < 0) 7210 goto out; 7211 } else { 7212 /* read data from the client using rdma channel, and 7213 * write the data. 7214 */ 7215 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 7216 writethrough); 7217 if (nbytes < 0) { 7218 err = (int)nbytes; 7219 goto out; 7220 } 7221 } 7222 7223 rsp->StructureSize = cpu_to_le16(17); 7224 rsp->DataOffset = 0; 7225 rsp->Reserved = 0; 7226 rsp->DataLength = cpu_to_le32(nbytes); 7227 rsp->DataRemaining = 0; 7228 rsp->Reserved2 = 0; 7229 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 7230 if (err) 7231 goto out; 7232 ksmbd_fd_put(work, fp); 7233 return 0; 7234 7235 out: 7236 if (err == -EAGAIN) 7237 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7238 else if (err == -ENOSPC || err == -EFBIG) 7239 rsp->hdr.Status = STATUS_DISK_FULL; 7240 else if (err == -ENOENT) 7241 rsp->hdr.Status = STATUS_FILE_CLOSED; 7242 else if (err == -EACCES) 7243 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7244 else if (err == -ESHARE) 7245 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 7246 else if (err == -EINVAL) 7247 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7248 else 7249 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7250 7251 smb2_set_err_rsp(work); 7252 ksmbd_fd_put(work, fp); 7253 return err; 7254 } 7255 7256 /** 7257 * smb2_flush() - handler for smb2 flush file - fsync 7258 * @work: smb work containing flush command buffer 7259 * 7260 * Return: 0 on success, otherwise error 7261 */ 7262 int smb2_flush(struct ksmbd_work *work) 7263 { 7264 struct smb2_flush_req *req; 7265 struct smb2_flush_rsp *rsp; 7266 int err; 7267 7268 WORK_BUFFERS(work, req, rsp); 7269 7270 ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId); 7271 7272 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 7273 if (err) 7274 goto out; 7275 7276 rsp->StructureSize = cpu_to_le16(4); 7277 rsp->Reserved = 0; 7278 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 7279 7280 out: 7281 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7282 smb2_set_err_rsp(work); 7283 return err; 7284 } 7285 7286 /** 7287 * smb2_cancel() - handler for smb2 cancel command 7288 * @work: smb work containing cancel command buffer 7289 * 7290 * Return: 0 on success, otherwise error 7291 */ 7292 int smb2_cancel(struct ksmbd_work *work) 7293 { 7294 struct ksmbd_conn *conn = work->conn; 7295 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 7296 struct smb2_hdr *chdr; 7297 struct ksmbd_work *iter; 7298 struct list_head *command_list; 7299 7300 if (work->next_smb2_rcv_hdr_off) 7301 hdr = ksmbd_resp_buf_next(work); 7302 7303 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 7304 hdr->MessageId, hdr->Flags); 7305 7306 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 7307 command_list = &conn->async_requests; 7308 7309 spin_lock(&conn->request_lock); 7310 list_for_each_entry(iter, command_list, 7311 async_request_entry) { 7312 chdr = smb_get_msg(iter->request_buf); 7313 7314 if (iter->async_id != 7315 le64_to_cpu(hdr->Id.AsyncId)) 7316 continue; 7317 7318 ksmbd_debug(SMB, 7319 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 7320 le64_to_cpu(hdr->Id.AsyncId), 7321 le16_to_cpu(chdr->Command)); 7322 iter->state = KSMBD_WORK_CANCELLED; 7323 if (iter->cancel_fn) 7324 iter->cancel_fn(iter->cancel_argv); 7325 break; 7326 } 7327 spin_unlock(&conn->request_lock); 7328 } else { 7329 command_list = &conn->requests; 7330 7331 spin_lock(&conn->request_lock); 7332 list_for_each_entry(iter, command_list, request_entry) { 7333 chdr = smb_get_msg(iter->request_buf); 7334 7335 if (chdr->MessageId != hdr->MessageId || 7336 iter == work) 7337 continue; 7338 7339 ksmbd_debug(SMB, 7340 "smb2 with mid %llu cancelled command = 0x%x\n", 7341 le64_to_cpu(hdr->MessageId), 7342 le16_to_cpu(chdr->Command)); 7343 iter->state = KSMBD_WORK_CANCELLED; 7344 break; 7345 } 7346 spin_unlock(&conn->request_lock); 7347 } 7348 7349 /* For SMB2_CANCEL command itself send no response*/ 7350 work->send_no_response = 1; 7351 return 0; 7352 } 7353 7354 struct file_lock *smb_flock_init(struct file *f) 7355 { 7356 struct file_lock *fl; 7357 7358 fl = locks_alloc_lock(); 7359 if (!fl) 7360 goto out; 7361 7362 locks_init_lock(fl); 7363 7364 fl->c.flc_owner = f; 7365 fl->c.flc_pid = current->tgid; 7366 fl->c.flc_file = f; 7367 fl->c.flc_flags = FL_POSIX; 7368 fl->fl_ops = NULL; 7369 fl->fl_lmops = NULL; 7370 7371 out: 7372 return fl; 7373 } 7374 7375 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 7376 { 7377 int cmd = -EINVAL; 7378 7379 /* Checking for wrong flag combination during lock request*/ 7380 switch (flags) { 7381 case SMB2_LOCKFLAG_SHARED: 7382 ksmbd_debug(SMB, "received shared request\n"); 7383 cmd = F_SETLKW; 7384 flock->c.flc_type = F_RDLCK; 7385 flock->c.flc_flags |= FL_SLEEP; 7386 break; 7387 case SMB2_LOCKFLAG_EXCLUSIVE: 7388 ksmbd_debug(SMB, "received exclusive request\n"); 7389 cmd = F_SETLKW; 7390 flock->c.flc_type = F_WRLCK; 7391 flock->c.flc_flags |= FL_SLEEP; 7392 break; 7393 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7394 ksmbd_debug(SMB, 7395 "received shared & fail immediately request\n"); 7396 cmd = F_SETLK; 7397 flock->c.flc_type = F_RDLCK; 7398 break; 7399 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7400 ksmbd_debug(SMB, 7401 "received exclusive & fail immediately request\n"); 7402 cmd = F_SETLK; 7403 flock->c.flc_type = F_WRLCK; 7404 break; 7405 case SMB2_LOCKFLAG_UNLOCK: 7406 ksmbd_debug(SMB, "received unlock request\n"); 7407 flock->c.flc_type = F_UNLCK; 7408 cmd = F_SETLK; 7409 break; 7410 } 7411 7412 return cmd; 7413 } 7414 7415 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 7416 unsigned int cmd, int flags, 7417 struct list_head *lock_list) 7418 { 7419 struct ksmbd_lock *lock; 7420 7421 lock = kzalloc_obj(struct ksmbd_lock, KSMBD_DEFAULT_GFP); 7422 if (!lock) 7423 return NULL; 7424 7425 lock->cmd = cmd; 7426 lock->fl = flock; 7427 lock->start = flock->fl_start; 7428 lock->end = flock->fl_end; 7429 lock->flags = flags; 7430 if (lock->start == lock->end) 7431 lock->zero_len = 1; 7432 INIT_LIST_HEAD(&lock->clist); 7433 INIT_LIST_HEAD(&lock->flist); 7434 INIT_LIST_HEAD(&lock->llist); 7435 list_add_tail(&lock->llist, lock_list); 7436 7437 return lock; 7438 } 7439 7440 static void smb2_remove_blocked_lock(void **argv) 7441 { 7442 struct file_lock *flock = (struct file_lock *)argv[0]; 7443 7444 ksmbd_vfs_posix_lock_unblock(flock); 7445 locks_wake_up(flock); 7446 } 7447 7448 static inline bool lock_defer_pending(struct file_lock *fl) 7449 { 7450 /* check pending lock waiters */ 7451 return waitqueue_active(&fl->c.flc_wait); 7452 } 7453 7454 /** 7455 * smb2_lock() - handler for smb2 file lock command 7456 * @work: smb work containing lock command buffer 7457 * 7458 * Return: 0 on success, otherwise error 7459 */ 7460 int smb2_lock(struct ksmbd_work *work) 7461 { 7462 struct smb2_lock_req *req; 7463 struct smb2_lock_rsp *rsp; 7464 struct smb2_lock_element *lock_ele; 7465 struct ksmbd_file *fp = NULL; 7466 struct file_lock *flock = NULL; 7467 struct file *filp = NULL; 7468 int lock_count; 7469 int flags = 0; 7470 int cmd = 0; 7471 int err = -EIO, i, rc = 0; 7472 u64 lock_start, lock_length; 7473 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 7474 struct ksmbd_conn *conn; 7475 int nolock = 0; 7476 LIST_HEAD(lock_list); 7477 LIST_HEAD(rollback_list); 7478 int prior_lock = 0, bkt; 7479 7480 WORK_BUFFERS(work, req, rsp); 7481 7482 ksmbd_debug(SMB, "Received smb2 lock request\n"); 7483 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7484 if (!fp) { 7485 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 7486 err = -ENOENT; 7487 goto out2; 7488 } 7489 7490 filp = fp->filp; 7491 lock_count = le16_to_cpu(req->LockCount); 7492 lock_ele = req->locks; 7493 7494 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 7495 if (!lock_count) { 7496 err = -EINVAL; 7497 goto out2; 7498 } 7499 7500 for (i = 0; i < lock_count; i++) { 7501 flags = le32_to_cpu(lock_ele[i].Flags); 7502 7503 flock = smb_flock_init(filp); 7504 if (!flock) 7505 goto out; 7506 7507 cmd = smb2_set_flock_flags(flock, flags); 7508 7509 lock_start = le64_to_cpu(lock_ele[i].Offset); 7510 lock_length = le64_to_cpu(lock_ele[i].Length); 7511 if (lock_start > U64_MAX - lock_length) { 7512 pr_err("Invalid lock range requested\n"); 7513 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7514 locks_free_lock(flock); 7515 goto out; 7516 } 7517 7518 if (lock_start > OFFSET_MAX) 7519 flock->fl_start = OFFSET_MAX; 7520 else 7521 flock->fl_start = lock_start; 7522 7523 lock_length = le64_to_cpu(lock_ele[i].Length); 7524 if (lock_length > OFFSET_MAX - flock->fl_start) 7525 lock_length = OFFSET_MAX - flock->fl_start; 7526 7527 flock->fl_end = flock->fl_start + lock_length; 7528 7529 if (flock->fl_end < flock->fl_start) { 7530 ksmbd_debug(SMB, 7531 "the end offset(%llx) is smaller than the start offset(%llx)\n", 7532 flock->fl_end, flock->fl_start); 7533 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7534 locks_free_lock(flock); 7535 goto out; 7536 } 7537 7538 /* Check conflict locks in one request */ 7539 list_for_each_entry(cmp_lock, &lock_list, llist) { 7540 if (cmp_lock->fl->fl_start <= flock->fl_start && 7541 cmp_lock->fl->fl_end >= flock->fl_end) { 7542 if (cmp_lock->fl->c.flc_type != F_UNLCK && 7543 flock->c.flc_type != F_UNLCK) { 7544 pr_err("conflict two locks in one request\n"); 7545 err = -EINVAL; 7546 locks_free_lock(flock); 7547 goto out; 7548 } 7549 } 7550 } 7551 7552 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 7553 if (!smb_lock) { 7554 err = -EINVAL; 7555 locks_free_lock(flock); 7556 goto out; 7557 } 7558 } 7559 7560 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7561 if (smb_lock->cmd < 0) { 7562 err = -EINVAL; 7563 goto out; 7564 } 7565 7566 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 7567 err = -EINVAL; 7568 goto out; 7569 } 7570 7571 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 7572 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 7573 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 7574 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 7575 err = -EINVAL; 7576 goto out; 7577 } 7578 7579 prior_lock = smb_lock->flags; 7580 7581 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 7582 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 7583 goto no_check_cl; 7584 7585 nolock = 1; 7586 /* check locks in connection list */ 7587 down_read(&conn_list_lock); 7588 hash_for_each(conn_list, bkt, conn, hlist) { 7589 spin_lock(&conn->llist_lock); 7590 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 7591 if (file_inode(cmp_lock->fl->c.flc_file) != 7592 file_inode(smb_lock->fl->c.flc_file)) 7593 continue; 7594 7595 if (lock_is_unlock(smb_lock->fl)) { 7596 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && 7597 cmp_lock->start == smb_lock->start && 7598 cmp_lock->end == smb_lock->end && 7599 !lock_defer_pending(cmp_lock->fl)) { 7600 nolock = 0; 7601 list_del(&cmp_lock->flist); 7602 list_del(&cmp_lock->clist); 7603 spin_unlock(&conn->llist_lock); 7604 up_read(&conn_list_lock); 7605 7606 locks_free_lock(cmp_lock->fl); 7607 kfree(cmp_lock); 7608 goto out_check_cl; 7609 } 7610 continue; 7611 } 7612 7613 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { 7614 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7615 continue; 7616 } else { 7617 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7618 continue; 7619 } 7620 7621 /* check zero byte lock range */ 7622 if (cmp_lock->zero_len && !smb_lock->zero_len && 7623 cmp_lock->start > smb_lock->start && 7624 cmp_lock->start < smb_lock->end) { 7625 spin_unlock(&conn->llist_lock); 7626 up_read(&conn_list_lock); 7627 pr_err("previous lock conflict with zero byte lock range\n"); 7628 goto out; 7629 } 7630 7631 if (smb_lock->zero_len && !cmp_lock->zero_len && 7632 smb_lock->start > cmp_lock->start && 7633 smb_lock->start < cmp_lock->end) { 7634 spin_unlock(&conn->llist_lock); 7635 up_read(&conn_list_lock); 7636 pr_err("current lock conflict with zero byte lock range\n"); 7637 goto out; 7638 } 7639 7640 if (((cmp_lock->start <= smb_lock->start && 7641 cmp_lock->end > smb_lock->start) || 7642 (cmp_lock->start < smb_lock->end && 7643 cmp_lock->end >= smb_lock->end)) && 7644 !cmp_lock->zero_len && !smb_lock->zero_len) { 7645 spin_unlock(&conn->llist_lock); 7646 up_read(&conn_list_lock); 7647 pr_err("Not allow lock operation on exclusive lock range\n"); 7648 goto out; 7649 } 7650 } 7651 spin_unlock(&conn->llist_lock); 7652 } 7653 up_read(&conn_list_lock); 7654 out_check_cl: 7655 if (lock_is_unlock(smb_lock->fl) && nolock) { 7656 pr_err("Try to unlock nolocked range\n"); 7657 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7658 goto out; 7659 } 7660 7661 no_check_cl: 7662 flock = smb_lock->fl; 7663 list_del(&smb_lock->llist); 7664 7665 if (smb_lock->zero_len) { 7666 err = 0; 7667 goto skip; 7668 } 7669 retry: 7670 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7671 skip: 7672 if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) { 7673 locks_free_lock(flock); 7674 kfree(smb_lock); 7675 if (!rc) { 7676 ksmbd_debug(SMB, "File unlocked\n"); 7677 } else if (rc == -ENOENT) { 7678 rsp->hdr.Status = STATUS_NOT_LOCKED; 7679 err = rc; 7680 goto out; 7681 } 7682 } else { 7683 if (rc == FILE_LOCK_DEFERRED) { 7684 void **argv; 7685 7686 ksmbd_debug(SMB, 7687 "would have to wait for getting lock\n"); 7688 list_add(&smb_lock->llist, &rollback_list); 7689 7690 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP); 7691 if (!argv) { 7692 err = -ENOMEM; 7693 goto out; 7694 } 7695 argv[0] = flock; 7696 7697 rc = setup_async_work(work, 7698 smb2_remove_blocked_lock, 7699 argv); 7700 if (rc) { 7701 kfree(argv); 7702 err = -ENOMEM; 7703 goto out; 7704 } 7705 spin_lock(&fp->f_lock); 7706 list_add(&work->fp_entry, &fp->blocked_works); 7707 spin_unlock(&fp->f_lock); 7708 7709 smb2_send_interim_resp(work, STATUS_PENDING); 7710 7711 ksmbd_vfs_posix_lock_wait(flock); 7712 7713 spin_lock(&fp->f_lock); 7714 list_del(&work->fp_entry); 7715 spin_unlock(&fp->f_lock); 7716 7717 if (work->state != KSMBD_WORK_ACTIVE) { 7718 list_del(&smb_lock->llist); 7719 locks_free_lock(flock); 7720 7721 if (work->state == KSMBD_WORK_CANCELLED) { 7722 rsp->hdr.Status = 7723 STATUS_CANCELLED; 7724 kfree(smb_lock); 7725 smb2_send_interim_resp(work, 7726 STATUS_CANCELLED); 7727 work->send_no_response = 1; 7728 goto out; 7729 } 7730 7731 rsp->hdr.Status = 7732 STATUS_RANGE_NOT_LOCKED; 7733 kfree(smb_lock); 7734 goto out2; 7735 } 7736 7737 list_del(&smb_lock->llist); 7738 release_async_work(work); 7739 goto retry; 7740 } else if (!rc) { 7741 list_add(&smb_lock->llist, &rollback_list); 7742 spin_lock(&work->conn->llist_lock); 7743 list_add_tail(&smb_lock->clist, 7744 &work->conn->lock_list); 7745 list_add_tail(&smb_lock->flist, 7746 &fp->lock_list); 7747 spin_unlock(&work->conn->llist_lock); 7748 ksmbd_debug(SMB, "successful in taking lock\n"); 7749 } else { 7750 locks_free_lock(flock); 7751 kfree(smb_lock); 7752 err = rc; 7753 goto out; 7754 } 7755 } 7756 } 7757 7758 if (atomic_read(&fp->f_ci->op_count) > 1) 7759 smb_break_all_oplock(work, fp); 7760 7761 rsp->StructureSize = cpu_to_le16(4); 7762 ksmbd_debug(SMB, "successful in taking lock\n"); 7763 rsp->hdr.Status = STATUS_SUCCESS; 7764 rsp->Reserved = 0; 7765 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7766 if (err) 7767 goto out; 7768 7769 ksmbd_fd_put(work, fp); 7770 return 0; 7771 7772 out: 7773 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7774 locks_free_lock(smb_lock->fl); 7775 list_del(&smb_lock->llist); 7776 kfree(smb_lock); 7777 } 7778 7779 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7780 struct file_lock *rlock = NULL; 7781 7782 rlock = smb_flock_init(filp); 7783 if (rlock) { 7784 rlock->c.flc_type = F_UNLCK; 7785 rlock->fl_start = smb_lock->start; 7786 rlock->fl_end = smb_lock->end; 7787 7788 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7789 if (rc) 7790 pr_err("rollback unlock fail : %d\n", rc); 7791 } else { 7792 pr_err("rollback unlock alloc failed\n"); 7793 } 7794 7795 list_del(&smb_lock->llist); 7796 spin_lock(&work->conn->llist_lock); 7797 if (!list_empty(&smb_lock->flist)) 7798 list_del(&smb_lock->flist); 7799 list_del(&smb_lock->clist); 7800 spin_unlock(&work->conn->llist_lock); 7801 7802 locks_free_lock(smb_lock->fl); 7803 if (rlock) 7804 locks_free_lock(rlock); 7805 kfree(smb_lock); 7806 } 7807 out2: 7808 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7809 7810 if (!rsp->hdr.Status) { 7811 if (err == -EINVAL) 7812 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7813 else if (err == -ENOMEM) 7814 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7815 else if (err == -ENOENT) 7816 rsp->hdr.Status = STATUS_FILE_CLOSED; 7817 else 7818 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7819 } 7820 7821 smb2_set_err_rsp(work); 7822 ksmbd_fd_put(work, fp); 7823 return err; 7824 } 7825 7826 static int fsctl_copychunk(struct ksmbd_work *work, 7827 struct copychunk_ioctl_req *ci_req, 7828 unsigned int cnt_code, 7829 unsigned int input_count, 7830 unsigned long long volatile_id, 7831 unsigned long long persistent_id, 7832 struct smb2_ioctl_rsp *rsp) 7833 { 7834 struct copychunk_ioctl_rsp *ci_rsp; 7835 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7836 struct srv_copychunk *chunks; 7837 unsigned int i, chunk_count, chunk_count_written = 0; 7838 unsigned int chunk_size_written = 0; 7839 loff_t total_size_written = 0; 7840 int ret = 0; 7841 7842 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7843 7844 rsp->VolatileFileId = volatile_id; 7845 rsp->PersistentFileId = persistent_id; 7846 ci_rsp->ChunksWritten = 7847 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7848 ci_rsp->ChunkBytesWritten = 7849 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7850 ci_rsp->TotalBytesWritten = 7851 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7852 7853 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7854 if (chunk_count == 0) 7855 goto out; 7856 total_size_written = 0; 7857 7858 /* verify the SRV_COPYCHUNK_COPY packet */ 7859 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7860 input_count < struct_size(ci_req, Chunks, chunk_count)) { 7861 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7862 return -EINVAL; 7863 } 7864 7865 chunks = &ci_req->Chunks[0]; 7866 for (i = 0; i < chunk_count; i++) { 7867 if (le32_to_cpu(chunks[i].Length) == 0 || 7868 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7869 break; 7870 total_size_written += le32_to_cpu(chunks[i].Length); 7871 } 7872 7873 if (i < chunk_count || 7874 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7875 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7876 return -EINVAL; 7877 } 7878 7879 src_fp = ksmbd_lookup_foreign_fd(work, 7880 le64_to_cpu(ci_req->SourceKeyU64[0])); 7881 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7882 ret = -EINVAL; 7883 if (!src_fp || 7884 src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) { 7885 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7886 goto out; 7887 } 7888 7889 if (!dst_fp) { 7890 rsp->hdr.Status = STATUS_FILE_CLOSED; 7891 goto out; 7892 } 7893 7894 /* 7895 * FILE_READ_DATA should only be included in 7896 * the FSCTL_COPYCHUNK case 7897 */ 7898 if (cnt_code == FSCTL_COPYCHUNK && 7899 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7900 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7901 goto out; 7902 } 7903 7904 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7905 chunks, chunk_count, 7906 &chunk_count_written, 7907 &chunk_size_written, 7908 &total_size_written); 7909 if (ret < 0) { 7910 if (ret == -EACCES) 7911 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7912 if (ret == -EAGAIN) 7913 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7914 else if (ret == -EBADF) 7915 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7916 else if (ret == -EFBIG || ret == -ENOSPC) 7917 rsp->hdr.Status = STATUS_DISK_FULL; 7918 else if (ret == -EINVAL) 7919 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7920 else if (ret == -EISDIR) 7921 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7922 else if (ret == -E2BIG) 7923 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7924 else 7925 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7926 } 7927 7928 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7929 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7930 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7931 out: 7932 ksmbd_fd_put(work, src_fp); 7933 ksmbd_fd_put(work, dst_fp); 7934 return ret; 7935 } 7936 7937 static __be32 idev_ipv4_address(struct in_device *idev) 7938 { 7939 __be32 addr = 0; 7940 7941 struct in_ifaddr *ifa; 7942 7943 rcu_read_lock(); 7944 in_dev_for_each_ifa_rcu(ifa, idev) { 7945 if (ifa->ifa_flags & IFA_F_SECONDARY) 7946 continue; 7947 7948 addr = ifa->ifa_address; 7949 break; 7950 } 7951 rcu_read_unlock(); 7952 return addr; 7953 } 7954 7955 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7956 struct smb2_ioctl_rsp *rsp, 7957 unsigned int out_buf_len) 7958 { 7959 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7960 int nbytes = 0; 7961 struct net_device *netdev; 7962 struct sockaddr_storage_rsp *sockaddr_storage; 7963 unsigned int flags; 7964 unsigned long long speed; 7965 7966 rtnl_lock(); 7967 for_each_netdev(&init_net, netdev) { 7968 bool ipv4_set = false; 7969 7970 if (netdev->type == ARPHRD_LOOPBACK) 7971 continue; 7972 7973 if (!ksmbd_find_netdev_name_iface_list(netdev->name)) 7974 continue; 7975 7976 flags = netif_get_flags(netdev); 7977 if (!(flags & IFF_RUNNING)) 7978 continue; 7979 ipv6_retry: 7980 if (out_buf_len < 7981 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7982 rtnl_unlock(); 7983 return -ENOSPC; 7984 } 7985 7986 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7987 &rsp->Buffer[nbytes]; 7988 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7989 7990 nii_rsp->Capability = 0; 7991 if (netdev->real_num_tx_queues > 1) 7992 nii_rsp->Capability |= RSS_CAPABLE; 7993 if (ksmbd_rdma_capable_netdev(netdev)) 7994 nii_rsp->Capability |= RDMA_CAPABLE; 7995 7996 nii_rsp->Next = cpu_to_le32(152); 7997 nii_rsp->Reserved = 0; 7998 7999 if (netdev->ethtool_ops->get_link_ksettings) { 8000 struct ethtool_link_ksettings cmd; 8001 8002 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 8003 speed = cmd.base.speed; 8004 } else { 8005 ksmbd_debug(SMB, "%s %s\n", netdev->name, 8006 "speed is unknown, defaulting to 1Gb/sec"); 8007 speed = SPEED_1000; 8008 } 8009 8010 speed *= 1000000; 8011 nii_rsp->LinkSpeed = cpu_to_le64(speed); 8012 8013 sockaddr_storage = (struct sockaddr_storage_rsp *) 8014 nii_rsp->SockAddr_Storage; 8015 memset(sockaddr_storage, 0, 128); 8016 8017 if (!ipv4_set) { 8018 struct in_device *idev; 8019 8020 sockaddr_storage->Family = INTERNETWORK; 8021 sockaddr_storage->addr4.Port = 0; 8022 8023 idev = __in_dev_get_rtnl(netdev); 8024 if (!idev) 8025 continue; 8026 sockaddr_storage->addr4.IPv4Address = 8027 idev_ipv4_address(idev); 8028 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 8029 ipv4_set = true; 8030 goto ipv6_retry; 8031 } else { 8032 struct inet6_dev *idev6; 8033 struct inet6_ifaddr *ifa; 8034 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6Address; 8035 8036 sockaddr_storage->Family = INTERNETWORKV6; 8037 sockaddr_storage->addr6.Port = 0; 8038 sockaddr_storage->addr6.FlowInfo = 0; 8039 8040 idev6 = __in6_dev_get(netdev); 8041 if (!idev6) 8042 continue; 8043 8044 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 8045 if (ifa->flags & (IFA_F_TENTATIVE | 8046 IFA_F_DEPRECATED)) 8047 continue; 8048 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 8049 break; 8050 } 8051 sockaddr_storage->addr6.ScopeId = 0; 8052 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 8053 } 8054 } 8055 rtnl_unlock(); 8056 8057 /* zero if this is last one */ 8058 if (nii_rsp) 8059 nii_rsp->Next = 0; 8060 8061 rsp->PersistentFileId = SMB2_NO_FID; 8062 rsp->VolatileFileId = SMB2_NO_FID; 8063 return nbytes; 8064 } 8065 8066 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 8067 struct validate_negotiate_info_req *neg_req, 8068 struct validate_negotiate_info_rsp *neg_rsp, 8069 unsigned int in_buf_len) 8070 { 8071 int ret = 0; 8072 int dialect; 8073 8074 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 8075 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 8076 return -EINVAL; 8077 8078 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 8079 neg_req->DialectCount); 8080 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 8081 ret = -EINVAL; 8082 goto err_out; 8083 } 8084 8085 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 8086 ret = -EINVAL; 8087 goto err_out; 8088 } 8089 8090 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 8091 ret = -EINVAL; 8092 goto err_out; 8093 } 8094 8095 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 8096 ret = -EINVAL; 8097 goto err_out; 8098 } 8099 8100 neg_rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 8101 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 8102 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 8103 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 8104 err_out: 8105 return ret; 8106 } 8107 8108 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 8109 struct file_allocated_range_buffer *qar_req, 8110 struct file_allocated_range_buffer *qar_rsp, 8111 unsigned int in_count, unsigned int *out_count) 8112 { 8113 struct ksmbd_file *fp; 8114 loff_t start, length; 8115 int ret = 0; 8116 8117 *out_count = 0; 8118 if (in_count == 0) 8119 return -EINVAL; 8120 8121 start = le64_to_cpu(qar_req->file_offset); 8122 length = le64_to_cpu(qar_req->length); 8123 8124 if (start < 0 || length < 0) 8125 return -EINVAL; 8126 8127 fp = ksmbd_lookup_fd_fast(work, id); 8128 if (!fp) 8129 return -ENOENT; 8130 8131 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 8132 qar_rsp, in_count, out_count); 8133 if (ret && ret != -E2BIG) 8134 *out_count = 0; 8135 8136 ksmbd_fd_put(work, fp); 8137 return ret; 8138 } 8139 8140 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 8141 unsigned int out_buf_len, 8142 struct smb2_ioctl_req *req, 8143 struct smb2_ioctl_rsp *rsp) 8144 { 8145 struct ksmbd_rpc_command *rpc_resp; 8146 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); 8147 int nbytes = 0; 8148 8149 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 8150 le32_to_cpu(req->InputCount)); 8151 if (rpc_resp) { 8152 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 8153 /* 8154 * set STATUS_SOME_NOT_MAPPED response 8155 * for unknown domain sid. 8156 */ 8157 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 8158 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 8159 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8160 goto out; 8161 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 8162 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8163 goto out; 8164 } 8165 8166 nbytes = rpc_resp->payload_sz; 8167 if (rpc_resp->payload_sz > out_buf_len) { 8168 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8169 nbytes = out_buf_len; 8170 } 8171 8172 if (!rpc_resp->payload_sz) { 8173 rsp->hdr.Status = 8174 STATUS_UNEXPECTED_IO_ERROR; 8175 goto out; 8176 } 8177 8178 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 8179 } 8180 out: 8181 kvfree(rpc_resp); 8182 return nbytes; 8183 } 8184 8185 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 8186 struct file_sparse *sparse) 8187 { 8188 struct ksmbd_file *fp; 8189 struct mnt_idmap *idmap; 8190 int ret = 0; 8191 __le32 old_fattr; 8192 8193 fp = ksmbd_lookup_fd_fast(work, id); 8194 if (!fp) 8195 return -ENOENT; 8196 idmap = file_mnt_idmap(fp->filp); 8197 8198 old_fattr = fp->f_ci->m_fattr; 8199 if (sparse->SetSparse) 8200 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 8201 else 8202 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 8203 8204 if (fp->f_ci->m_fattr != old_fattr && 8205 test_share_config_flag(work->tcon->share_conf, 8206 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 8207 struct xattr_dos_attrib da; 8208 8209 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 8210 fp->filp->f_path.dentry, &da); 8211 if (ret <= 0) 8212 goto out; 8213 8214 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 8215 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 8216 &fp->filp->f_path, 8217 &da, true); 8218 if (ret) 8219 fp->f_ci->m_fattr = old_fattr; 8220 } 8221 8222 out: 8223 ksmbd_fd_put(work, fp); 8224 return ret; 8225 } 8226 8227 static int fsctl_request_resume_key(struct ksmbd_work *work, 8228 struct smb2_ioctl_req *req, 8229 struct resume_key_ioctl_rsp *key_rsp) 8230 { 8231 struct ksmbd_file *fp; 8232 8233 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 8234 if (!fp) 8235 return -ENOENT; 8236 8237 memset(key_rsp, 0, sizeof(*key_rsp)); 8238 key_rsp->ResumeKeyU64[0] = req->VolatileFileId; 8239 key_rsp->ResumeKeyU64[1] = req->PersistentFileId; 8240 ksmbd_fd_put(work, fp); 8241 8242 return 0; 8243 } 8244 8245 /** 8246 * smb2_ioctl() - handler for smb2 ioctl command 8247 * @work: smb work containing ioctl command buffer 8248 * 8249 * Return: 0 on success, otherwise error 8250 */ 8251 int smb2_ioctl(struct ksmbd_work *work) 8252 { 8253 struct smb2_ioctl_req *req; 8254 struct smb2_ioctl_rsp *rsp; 8255 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 8256 u64 id = KSMBD_NO_FID; 8257 struct ksmbd_conn *conn = work->conn; 8258 int ret = 0; 8259 char *buffer; 8260 8261 ksmbd_debug(SMB, "Received smb2 ioctl request\n"); 8262 8263 if (work->next_smb2_rcv_hdr_off) { 8264 req = ksmbd_req_buf_next(work); 8265 rsp = ksmbd_resp_buf_next(work); 8266 if (!has_file_id(req->VolatileFileId)) { 8267 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 8268 work->compound_fid); 8269 id = work->compound_fid; 8270 } 8271 } else { 8272 req = smb_get_msg(work->request_buf); 8273 rsp = smb_get_msg(work->response_buf); 8274 } 8275 8276 if (!has_file_id(id)) 8277 id = req->VolatileFileId; 8278 8279 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 8280 ret = -EOPNOTSUPP; 8281 goto out; 8282 } 8283 8284 buffer = (char *)req + le32_to_cpu(req->InputOffset); 8285 8286 cnt_code = le32_to_cpu(req->CtlCode); 8287 ret = smb2_calc_max_out_buf_len(work, 8288 offsetof(struct smb2_ioctl_rsp, Buffer), 8289 le32_to_cpu(req->MaxOutputResponse)); 8290 if (ret < 0) { 8291 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8292 goto out; 8293 } 8294 out_buf_len = (unsigned int)ret; 8295 in_buf_len = le32_to_cpu(req->InputCount); 8296 8297 switch (cnt_code) { 8298 case FSCTL_DFS_GET_REFERRALS: 8299 case FSCTL_DFS_GET_REFERRALS_EX: 8300 /* Not support DFS yet */ 8301 ret = -EOPNOTSUPP; 8302 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 8303 goto out2; 8304 case FSCTL_CREATE_OR_GET_OBJECT_ID: 8305 { 8306 struct file_object_buf_type1_ioctl_rsp *obj_buf; 8307 8308 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 8309 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 8310 &rsp->Buffer[0]; 8311 8312 /* 8313 * TODO: This is dummy implementation to pass smbtorture 8314 * Need to check correct response later 8315 */ 8316 memset(obj_buf->ObjectId, 0x0, 16); 8317 memset(obj_buf->BirthVolumeId, 0x0, 16); 8318 memset(obj_buf->BirthObjectId, 0x0, 16); 8319 memset(obj_buf->DomainId, 0x0, 16); 8320 8321 break; 8322 } 8323 case FSCTL_PIPE_TRANSCEIVE: 8324 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 8325 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 8326 break; 8327 case FSCTL_VALIDATE_NEGOTIATE_INFO: 8328 if (conn->dialect < SMB30_PROT_ID) { 8329 ret = -EOPNOTSUPP; 8330 goto out; 8331 } 8332 8333 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 8334 Dialects)) { 8335 ret = -EINVAL; 8336 goto out; 8337 } 8338 8339 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 8340 ret = -EINVAL; 8341 goto out; 8342 } 8343 8344 ret = fsctl_validate_negotiate_info(conn, 8345 (struct validate_negotiate_info_req *)buffer, 8346 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 8347 in_buf_len); 8348 if (ret < 0) 8349 goto out; 8350 8351 nbytes = sizeof(struct validate_negotiate_info_rsp); 8352 rsp->PersistentFileId = SMB2_NO_FID; 8353 rsp->VolatileFileId = SMB2_NO_FID; 8354 break; 8355 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 8356 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 8357 if (ret < 0) 8358 goto out; 8359 nbytes = ret; 8360 break; 8361 case FSCTL_REQUEST_RESUME_KEY: 8362 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 8363 ret = -EINVAL; 8364 goto out; 8365 } 8366 8367 ret = fsctl_request_resume_key(work, req, 8368 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 8369 if (ret < 0) 8370 goto out; 8371 rsp->PersistentFileId = req->PersistentFileId; 8372 rsp->VolatileFileId = req->VolatileFileId; 8373 nbytes = sizeof(struct resume_key_ioctl_rsp); 8374 break; 8375 case FSCTL_COPYCHUNK: 8376 case FSCTL_COPYCHUNK_WRITE: 8377 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8378 ksmbd_debug(SMB, 8379 "User does not have write permission\n"); 8380 ret = -EACCES; 8381 goto out; 8382 } 8383 8384 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) { 8385 ret = -EINVAL; 8386 goto out; 8387 } 8388 8389 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 8390 ret = -EINVAL; 8391 goto out; 8392 } 8393 8394 nbytes = sizeof(struct copychunk_ioctl_rsp); 8395 rsp->VolatileFileId = req->VolatileFileId; 8396 rsp->PersistentFileId = req->PersistentFileId; 8397 fsctl_copychunk(work, 8398 (struct copychunk_ioctl_req *)buffer, 8399 le32_to_cpu(req->CtlCode), 8400 le32_to_cpu(req->InputCount), 8401 req->VolatileFileId, 8402 req->PersistentFileId, 8403 rsp); 8404 break; 8405 case FSCTL_SET_SPARSE: 8406 if (in_buf_len < sizeof(struct file_sparse)) { 8407 ret = -EINVAL; 8408 goto out; 8409 } 8410 8411 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); 8412 if (ret < 0) 8413 goto out; 8414 break; 8415 case FSCTL_SET_ZERO_DATA: 8416 { 8417 struct file_zero_data_information *zero_data; 8418 struct ksmbd_file *fp; 8419 loff_t off, len, bfz; 8420 8421 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8422 ksmbd_debug(SMB, 8423 "User does not have write permission\n"); 8424 ret = -EACCES; 8425 goto out; 8426 } 8427 8428 if (in_buf_len < sizeof(struct file_zero_data_information)) { 8429 ret = -EINVAL; 8430 goto out; 8431 } 8432 8433 zero_data = 8434 (struct file_zero_data_information *)buffer; 8435 8436 off = le64_to_cpu(zero_data->FileOffset); 8437 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 8438 if (off < 0 || bfz < 0 || off > bfz) { 8439 ret = -EINVAL; 8440 goto out; 8441 } 8442 8443 len = bfz - off; 8444 if (len) { 8445 fp = ksmbd_lookup_fd_fast(work, id); 8446 if (!fp) { 8447 ret = -ENOENT; 8448 goto out; 8449 } 8450 8451 ret = ksmbd_vfs_zero_data(work, fp, off, len); 8452 ksmbd_fd_put(work, fp); 8453 if (ret < 0) 8454 goto out; 8455 } 8456 break; 8457 } 8458 case FSCTL_QUERY_ALLOCATED_RANGES: 8459 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 8460 ret = -EINVAL; 8461 goto out; 8462 } 8463 8464 ret = fsctl_query_allocated_ranges(work, id, 8465 (struct file_allocated_range_buffer *)buffer, 8466 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 8467 out_buf_len / 8468 sizeof(struct file_allocated_range_buffer), &nbytes); 8469 if (ret == -E2BIG) { 8470 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8471 } else if (ret < 0) { 8472 nbytes = 0; 8473 goto out; 8474 } 8475 8476 nbytes *= sizeof(struct file_allocated_range_buffer); 8477 break; 8478 case FSCTL_GET_REPARSE_POINT: 8479 { 8480 struct reparse_data_buffer *reparse_ptr; 8481 struct ksmbd_file *fp; 8482 8483 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 8484 fp = ksmbd_lookup_fd_fast(work, id); 8485 if (!fp) { 8486 pr_err("not found fp!!\n"); 8487 ret = -ENOENT; 8488 goto out; 8489 } 8490 8491 reparse_ptr->ReparseTag = 8492 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 8493 reparse_ptr->ReparseDataLength = 0; 8494 ksmbd_fd_put(work, fp); 8495 nbytes = sizeof(struct reparse_data_buffer); 8496 break; 8497 } 8498 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 8499 { 8500 struct ksmbd_file *fp_in, *fp_out = NULL; 8501 struct duplicate_extents_to_file *dup_ext; 8502 loff_t src_off, dst_off, length, cloned; 8503 8504 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 8505 ret = -EINVAL; 8506 goto out; 8507 } 8508 8509 dup_ext = (struct duplicate_extents_to_file *)buffer; 8510 8511 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 8512 dup_ext->PersistentFileHandle); 8513 if (!fp_in) { 8514 pr_err("not found file handle in duplicate extent to file\n"); 8515 ret = -ENOENT; 8516 goto out; 8517 } 8518 8519 fp_out = ksmbd_lookup_fd_fast(work, id); 8520 if (!fp_out) { 8521 pr_err("not found fp\n"); 8522 ret = -ENOENT; 8523 goto dup_ext_out; 8524 } 8525 8526 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 8527 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 8528 length = le64_to_cpu(dup_ext->ByteCount); 8529 /* 8530 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 8531 * should fall back to vfs_copy_file_range(). This could be 8532 * beneficial when re-exporting nfs/smb mount, but note that 8533 * this can result in partial copy that returns an error status. 8534 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 8535 * fall back to vfs_copy_file_range(), should be avoided when 8536 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 8537 */ 8538 cloned = vfs_clone_file_range(fp_in->filp, src_off, 8539 fp_out->filp, dst_off, length, 0); 8540 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 8541 ret = -EOPNOTSUPP; 8542 goto dup_ext_out; 8543 } else if (cloned != length) { 8544 cloned = vfs_copy_file_range(fp_in->filp, src_off, 8545 fp_out->filp, dst_off, 8546 length, 0); 8547 if (cloned != length) { 8548 if (cloned < 0) 8549 ret = cloned; 8550 else 8551 ret = -EINVAL; 8552 } 8553 } 8554 8555 dup_ext_out: 8556 ksmbd_fd_put(work, fp_in); 8557 ksmbd_fd_put(work, fp_out); 8558 if (ret < 0) 8559 goto out; 8560 break; 8561 } 8562 default: 8563 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 8564 cnt_code); 8565 ret = -EOPNOTSUPP; 8566 goto out; 8567 } 8568 8569 rsp->CtlCode = cpu_to_le32(cnt_code); 8570 rsp->InputCount = cpu_to_le32(0); 8571 rsp->InputOffset = cpu_to_le32(112); 8572 rsp->OutputOffset = cpu_to_le32(112); 8573 rsp->OutputCount = cpu_to_le32(nbytes); 8574 rsp->StructureSize = cpu_to_le16(49); 8575 rsp->Reserved = cpu_to_le16(0); 8576 rsp->Flags = cpu_to_le32(0); 8577 rsp->Reserved2 = cpu_to_le32(0); 8578 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 8579 if (!ret) 8580 return ret; 8581 8582 out: 8583 if (ret == -EACCES) 8584 rsp->hdr.Status = STATUS_ACCESS_DENIED; 8585 else if (ret == -ENOENT) 8586 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 8587 else if (ret == -EOPNOTSUPP) 8588 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8589 else if (ret == -ENOSPC) 8590 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 8591 else if (ret < 0 || rsp->hdr.Status == 0) 8592 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8593 8594 out2: 8595 smb2_set_err_rsp(work); 8596 return ret; 8597 } 8598 8599 /** 8600 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 8601 * @work: smb work containing oplock break command buffer 8602 * 8603 * Return: 0 8604 */ 8605 static void smb20_oplock_break_ack(struct ksmbd_work *work) 8606 { 8607 struct smb2_oplock_break *req; 8608 struct smb2_oplock_break *rsp; 8609 struct ksmbd_file *fp; 8610 struct oplock_info *opinfo = NULL; 8611 __le32 err = 0; 8612 int ret = 0; 8613 u64 volatile_id, persistent_id; 8614 char req_oplevel = 0, rsp_oplevel = 0; 8615 unsigned int oplock_change_type; 8616 8617 WORK_BUFFERS(work, req, rsp); 8618 8619 volatile_id = req->VolatileFid; 8620 persistent_id = req->PersistentFid; 8621 req_oplevel = req->OplockLevel; 8622 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8623 volatile_id, persistent_id, req_oplevel); 8624 8625 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8626 if (!fp) { 8627 rsp->hdr.Status = STATUS_FILE_CLOSED; 8628 smb2_set_err_rsp(work); 8629 return; 8630 } 8631 8632 opinfo = opinfo_get(fp); 8633 if (!opinfo) { 8634 pr_err("unexpected null oplock_info\n"); 8635 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8636 smb2_set_err_rsp(work); 8637 ksmbd_fd_put(work, fp); 8638 return; 8639 } 8640 8641 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8642 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8643 goto err_out; 8644 } 8645 8646 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8647 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8648 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8649 goto err_out; 8650 } 8651 8652 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8653 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8654 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8655 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8656 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8657 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8658 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8659 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8660 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8661 oplock_change_type = OPLOCK_READ_TO_NONE; 8662 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8663 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8664 err = STATUS_INVALID_DEVICE_STATE; 8665 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8666 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8667 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8668 oplock_change_type = OPLOCK_WRITE_TO_READ; 8669 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8670 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8671 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8672 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8673 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8674 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8675 oplock_change_type = OPLOCK_READ_TO_NONE; 8676 } else { 8677 oplock_change_type = 0; 8678 } 8679 } else { 8680 oplock_change_type = 0; 8681 } 8682 8683 switch (oplock_change_type) { 8684 case OPLOCK_WRITE_TO_READ: 8685 ret = opinfo_write_to_read(opinfo); 8686 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8687 break; 8688 case OPLOCK_WRITE_TO_NONE: 8689 ret = opinfo_write_to_none(opinfo); 8690 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8691 break; 8692 case OPLOCK_READ_TO_NONE: 8693 ret = opinfo_read_to_none(opinfo); 8694 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8695 break; 8696 default: 8697 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8698 opinfo->level, rsp_oplevel); 8699 } 8700 8701 if (ret < 0) { 8702 rsp->hdr.Status = err; 8703 goto err_out; 8704 } 8705 8706 rsp->StructureSize = cpu_to_le16(24); 8707 rsp->OplockLevel = rsp_oplevel; 8708 rsp->Reserved = 0; 8709 rsp->Reserved2 = 0; 8710 rsp->VolatileFid = volatile_id; 8711 rsp->PersistentFid = persistent_id; 8712 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8713 if (ret) { 8714 err_out: 8715 smb2_set_err_rsp(work); 8716 } 8717 8718 opinfo->op_state = OPLOCK_STATE_NONE; 8719 wake_up_interruptible_all(&opinfo->oplock_q); 8720 opinfo_put(opinfo); 8721 ksmbd_fd_put(work, fp); 8722 } 8723 8724 static int check_lease_state(struct lease *lease, __le32 req_state) 8725 { 8726 if ((lease->new_state == 8727 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8728 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8729 lease->new_state = req_state; 8730 return 0; 8731 } 8732 8733 if (lease->new_state == req_state) 8734 return 0; 8735 8736 return 1; 8737 } 8738 8739 /** 8740 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8741 * @work: smb work containing lease break command buffer 8742 * 8743 * Return: 0 8744 */ 8745 static void smb21_lease_break_ack(struct ksmbd_work *work) 8746 { 8747 struct ksmbd_conn *conn = work->conn; 8748 struct smb2_lease_ack *req; 8749 struct smb2_lease_ack *rsp; 8750 struct oplock_info *opinfo; 8751 __le32 err = 0; 8752 int ret = 0; 8753 unsigned int lease_change_type; 8754 __le32 lease_state; 8755 struct lease *lease; 8756 8757 WORK_BUFFERS(work, req, rsp); 8758 8759 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8760 le32_to_cpu(req->LeaseState)); 8761 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8762 if (!opinfo) { 8763 ksmbd_debug(OPLOCK, "file not opened\n"); 8764 smb2_set_err_rsp(work); 8765 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8766 return; 8767 } 8768 lease = opinfo->o_lease; 8769 8770 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8771 pr_err("unexpected lease break state 0x%x\n", 8772 opinfo->op_state); 8773 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8774 goto err_out; 8775 } 8776 8777 if (check_lease_state(lease, req->LeaseState)) { 8778 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8779 ksmbd_debug(OPLOCK, 8780 "req lease state: 0x%x, expected state: 0x%x\n", 8781 req->LeaseState, lease->new_state); 8782 goto err_out; 8783 } 8784 8785 if (!atomic_read(&opinfo->breaking_cnt)) { 8786 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8787 goto err_out; 8788 } 8789 8790 /* check for bad lease state */ 8791 if (req->LeaseState & 8792 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8793 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8794 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8795 lease_change_type = OPLOCK_WRITE_TO_NONE; 8796 else 8797 lease_change_type = OPLOCK_READ_TO_NONE; 8798 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8799 le32_to_cpu(lease->state), 8800 le32_to_cpu(req->LeaseState)); 8801 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8802 req->LeaseState != SMB2_LEASE_NONE_LE) { 8803 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8804 lease_change_type = OPLOCK_READ_TO_NONE; 8805 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8806 le32_to_cpu(lease->state), 8807 le32_to_cpu(req->LeaseState)); 8808 } else { 8809 /* valid lease state changes */ 8810 err = STATUS_INVALID_DEVICE_STATE; 8811 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8812 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8813 lease_change_type = OPLOCK_WRITE_TO_NONE; 8814 else 8815 lease_change_type = OPLOCK_READ_TO_NONE; 8816 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8817 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8818 lease_change_type = OPLOCK_WRITE_TO_READ; 8819 else 8820 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8821 } else { 8822 lease_change_type = 0; 8823 } 8824 } 8825 8826 switch (lease_change_type) { 8827 case OPLOCK_WRITE_TO_READ: 8828 ret = opinfo_write_to_read(opinfo); 8829 break; 8830 case OPLOCK_READ_HANDLE_TO_READ: 8831 ret = opinfo_read_handle_to_read(opinfo); 8832 break; 8833 case OPLOCK_WRITE_TO_NONE: 8834 ret = opinfo_write_to_none(opinfo); 8835 break; 8836 case OPLOCK_READ_TO_NONE: 8837 ret = opinfo_read_to_none(opinfo); 8838 break; 8839 default: 8840 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8841 le32_to_cpu(lease->state), 8842 le32_to_cpu(req->LeaseState)); 8843 } 8844 8845 if (ret < 0) { 8846 rsp->hdr.Status = err; 8847 goto err_out; 8848 } 8849 8850 lease_state = lease->state; 8851 8852 rsp->StructureSize = cpu_to_le16(36); 8853 rsp->Reserved = 0; 8854 rsp->Flags = 0; 8855 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8856 rsp->LeaseState = lease_state; 8857 rsp->LeaseDuration = 0; 8858 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8859 if (ret) { 8860 err_out: 8861 smb2_set_err_rsp(work); 8862 } 8863 8864 opinfo->op_state = OPLOCK_STATE_NONE; 8865 wake_up_interruptible_all(&opinfo->oplock_q); 8866 atomic_dec(&opinfo->breaking_cnt); 8867 wake_up_interruptible_all(&opinfo->oplock_brk); 8868 opinfo_put(opinfo); 8869 } 8870 8871 /** 8872 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8873 * @work: smb work containing oplock/lease break command buffer 8874 * 8875 * Return: 0 on success, otherwise error 8876 */ 8877 int smb2_oplock_break(struct ksmbd_work *work) 8878 { 8879 struct smb2_oplock_break *req; 8880 struct smb2_oplock_break *rsp; 8881 8882 ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n"); 8883 8884 WORK_BUFFERS(work, req, rsp); 8885 8886 switch (le16_to_cpu(req->StructureSize)) { 8887 case OP_BREAK_STRUCT_SIZE_20: 8888 smb20_oplock_break_ack(work); 8889 break; 8890 case OP_BREAK_STRUCT_SIZE_21: 8891 smb21_lease_break_ack(work); 8892 break; 8893 default: 8894 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8895 le16_to_cpu(req->StructureSize)); 8896 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8897 smb2_set_err_rsp(work); 8898 return -EINVAL; 8899 } 8900 8901 return 0; 8902 } 8903 8904 /** 8905 * smb2_notify() - handler for smb2 notify request 8906 * @work: smb work containing notify command buffer 8907 * 8908 * Return: 0 on success, otherwise error 8909 */ 8910 int smb2_notify(struct ksmbd_work *work) 8911 { 8912 struct smb2_change_notify_req *req; 8913 struct smb2_change_notify_rsp *rsp; 8914 8915 ksmbd_debug(SMB, "Received smb2 notify\n"); 8916 8917 WORK_BUFFERS(work, req, rsp); 8918 8919 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8920 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8921 smb2_set_err_rsp(work); 8922 return -EIO; 8923 } 8924 8925 smb2_set_err_rsp(work); 8926 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8927 return -EOPNOTSUPP; 8928 } 8929 8930 /** 8931 * smb2_is_sign_req() - handler for checking packet signing status 8932 * @work: smb work containing notify command buffer 8933 * @command: SMB2 command id 8934 * 8935 * Return: true if packed is signed, false otherwise 8936 */ 8937 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8938 { 8939 struct smb2_hdr *rcv_hdr2 = smb_get_msg(work->request_buf); 8940 8941 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8942 command != SMB2_NEGOTIATE_HE && 8943 command != SMB2_SESSION_SETUP_HE && 8944 command != SMB2_OPLOCK_BREAK_HE) 8945 return true; 8946 8947 return false; 8948 } 8949 8950 /** 8951 * smb2_check_sign_req() - handler for req packet sign processing 8952 * @work: smb work containing notify command buffer 8953 * 8954 * Return: 1 on success, 0 otherwise 8955 */ 8956 int smb2_check_sign_req(struct ksmbd_work *work) 8957 { 8958 struct smb2_hdr *hdr; 8959 char signature_req[SMB2_SIGNATURE_SIZE]; 8960 char signature[SMB2_HMACSHA256_SIZE]; 8961 struct kvec iov[1]; 8962 size_t len; 8963 8964 hdr = smb_get_msg(work->request_buf); 8965 if (work->next_smb2_rcv_hdr_off) 8966 hdr = ksmbd_req_buf_next(work); 8967 8968 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8969 len = get_rfc1002_len(work->request_buf); 8970 else if (hdr->NextCommand) 8971 len = le32_to_cpu(hdr->NextCommand); 8972 else 8973 len = get_rfc1002_len(work->request_buf) - 8974 work->next_smb2_rcv_hdr_off; 8975 8976 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8977 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8978 8979 iov[0].iov_base = (char *)&hdr->ProtocolId; 8980 iov[0].iov_len = len; 8981 8982 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8983 signature); 8984 8985 if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8986 pr_err("bad smb2 signature\n"); 8987 return 0; 8988 } 8989 8990 return 1; 8991 } 8992 8993 /** 8994 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8995 * @work: smb work containing notify command buffer 8996 * 8997 */ 8998 void smb2_set_sign_rsp(struct ksmbd_work *work) 8999 { 9000 struct smb2_hdr *hdr; 9001 char signature[SMB2_HMACSHA256_SIZE]; 9002 struct kvec *iov; 9003 int n_vec = 1; 9004 9005 hdr = ksmbd_resp_buf_curr(work); 9006 hdr->Flags |= SMB2_FLAGS_SIGNED; 9007 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9008 9009 if (hdr->Command == SMB2_READ) { 9010 iov = &work->iov[work->iov_idx - 1]; 9011 n_vec++; 9012 } else { 9013 iov = &work->iov[work->iov_idx]; 9014 } 9015 9016 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 9017 signature); 9018 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9019 } 9020 9021 /** 9022 * smb3_check_sign_req() - handler for req packet sign processing 9023 * @work: smb work containing notify command buffer 9024 * 9025 * Return: 1 on success, 0 otherwise 9026 */ 9027 int smb3_check_sign_req(struct ksmbd_work *work) 9028 { 9029 struct ksmbd_conn *conn = work->conn; 9030 char *signing_key; 9031 struct smb2_hdr *hdr; 9032 struct channel *chann; 9033 char signature_req[SMB2_SIGNATURE_SIZE]; 9034 char signature[SMB2_CMACAES_SIZE]; 9035 struct kvec iov[1]; 9036 size_t len; 9037 9038 hdr = smb_get_msg(work->request_buf); 9039 if (work->next_smb2_rcv_hdr_off) 9040 hdr = ksmbd_req_buf_next(work); 9041 9042 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 9043 len = get_rfc1002_len(work->request_buf); 9044 else if (hdr->NextCommand) 9045 len = le32_to_cpu(hdr->NextCommand); 9046 else 9047 len = get_rfc1002_len(work->request_buf) - 9048 work->next_smb2_rcv_hdr_off; 9049 9050 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 9051 signing_key = work->sess->smb3signingkey; 9052 } else { 9053 chann = lookup_chann_list(work->sess, conn); 9054 if (!chann) { 9055 return 0; 9056 } 9057 signing_key = chann->smb3signingkey; 9058 } 9059 9060 if (!signing_key) { 9061 pr_err("SMB3 signing key is not generated\n"); 9062 return 0; 9063 } 9064 9065 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 9066 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9067 iov[0].iov_base = (char *)&hdr->ProtocolId; 9068 iov[0].iov_len = len; 9069 9070 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 9071 return 0; 9072 9073 if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 9074 pr_err("bad smb2 signature\n"); 9075 return 0; 9076 } 9077 9078 return 1; 9079 } 9080 9081 /** 9082 * smb3_set_sign_rsp() - handler for rsp packet sign processing 9083 * @work: smb work containing notify command buffer 9084 * 9085 */ 9086 void smb3_set_sign_rsp(struct ksmbd_work *work) 9087 { 9088 struct ksmbd_conn *conn = work->conn; 9089 struct smb2_hdr *hdr; 9090 struct channel *chann; 9091 char signature[SMB2_CMACAES_SIZE]; 9092 struct kvec *iov; 9093 int n_vec = 1; 9094 char *signing_key; 9095 9096 hdr = ksmbd_resp_buf_curr(work); 9097 9098 if (conn->binding == false && 9099 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 9100 signing_key = work->sess->smb3signingkey; 9101 } else { 9102 chann = lookup_chann_list(work->sess, work->conn); 9103 if (!chann) { 9104 return; 9105 } 9106 signing_key = chann->smb3signingkey; 9107 } 9108 9109 if (!signing_key) 9110 return; 9111 9112 hdr->Flags |= SMB2_FLAGS_SIGNED; 9113 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9114 9115 if (hdr->Command == SMB2_READ) { 9116 iov = &work->iov[work->iov_idx - 1]; 9117 n_vec++; 9118 } else { 9119 iov = &work->iov[work->iov_idx]; 9120 } 9121 9122 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 9123 signature)) 9124 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9125 } 9126 9127 /** 9128 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 9129 * @work: smb work containing response buffer 9130 * 9131 */ 9132 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 9133 { 9134 struct ksmbd_conn *conn = work->conn; 9135 struct ksmbd_session *sess = work->sess; 9136 struct smb2_hdr *req, *rsp; 9137 9138 if (conn->dialect != SMB311_PROT_ID) 9139 return; 9140 9141 WORK_BUFFERS(work, req, rsp); 9142 9143 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 9144 conn->preauth_info) 9145 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9146 conn->preauth_info->Preauth_HashValue); 9147 9148 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 9149 __u8 *hash_value; 9150 9151 if (conn->binding) { 9152 struct preauth_session *preauth_sess; 9153 9154 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 9155 if (!preauth_sess) 9156 return; 9157 hash_value = preauth_sess->Preauth_HashValue; 9158 } else { 9159 hash_value = sess->Preauth_HashValue; 9160 if (!hash_value) 9161 return; 9162 } 9163 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9164 hash_value); 9165 } 9166 } 9167 9168 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 9169 { 9170 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 9171 struct smb2_hdr *hdr = smb_get_msg(old_buf); 9172 unsigned int orig_len = get_rfc1002_len(old_buf); 9173 9174 /* tr_buf must be cleared by the caller */ 9175 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 9176 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 9177 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 9178 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 9179 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 9180 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 9181 else 9182 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 9183 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 9184 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 9185 inc_rfc1001_len(tr_buf, orig_len); 9186 } 9187 9188 int smb3_encrypt_resp(struct ksmbd_work *work) 9189 { 9190 struct kvec *iov = work->iov; 9191 int rc = -ENOMEM; 9192 void *tr_buf; 9193 9194 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP); 9195 if (!tr_buf) 9196 return rc; 9197 9198 /* fill transform header */ 9199 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 9200 9201 iov[0].iov_base = tr_buf; 9202 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9203 work->tr_buf = tr_buf; 9204 9205 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 9206 } 9207 9208 bool smb3_is_transform_hdr(void *buf) 9209 { 9210 struct smb2_transform_hdr *trhdr = smb_get_msg(buf); 9211 9212 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 9213 } 9214 9215 int smb3_decrypt_req(struct ksmbd_work *work) 9216 { 9217 struct ksmbd_session *sess; 9218 char *buf = work->request_buf; 9219 unsigned int pdu_length = get_rfc1002_len(buf); 9220 struct kvec iov[2]; 9221 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 9222 struct smb2_transform_hdr *tr_hdr = smb_get_msg(buf); 9223 int rc = 0; 9224 9225 if (pdu_length < sizeof(struct smb2_transform_hdr) || 9226 buf_data_size < sizeof(struct smb2_hdr)) { 9227 pr_err("Transform message is too small (%u)\n", 9228 pdu_length); 9229 return -ECONNABORTED; 9230 } 9231 9232 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 9233 pr_err("Transform message is broken\n"); 9234 return -ECONNABORTED; 9235 } 9236 9237 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 9238 if (!sess) { 9239 pr_err("invalid session id(%llx) in transform header\n", 9240 le64_to_cpu(tr_hdr->SessionId)); 9241 return -ECONNABORTED; 9242 } 9243 ksmbd_user_session_put(sess); 9244 9245 iov[0].iov_base = buf; 9246 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9247 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 9248 iov[1].iov_len = buf_data_size; 9249 rc = ksmbd_crypt_message(work, iov, 2, 0); 9250 if (rc) 9251 return rc; 9252 9253 memmove(buf + 4, iov[1].iov_base, buf_data_size); 9254 *(__be32 *)buf = cpu_to_be32(buf_data_size); 9255 9256 return rc; 9257 } 9258 9259 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 9260 { 9261 struct ksmbd_conn *conn = work->conn; 9262 struct ksmbd_session *sess = work->sess; 9263 struct smb2_hdr *rsp = smb_get_msg(work->response_buf); 9264 9265 if (conn->dialect < SMB30_PROT_ID) 9266 return false; 9267 9268 if (work->next_smb2_rcv_hdr_off) 9269 rsp = ksmbd_resp_buf_next(work); 9270 9271 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 9272 sess->user && !user_guest(sess->user) && 9273 rsp->Status == STATUS_SUCCESS) 9274 return true; 9275 return false; 9276 } 9277