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 "../common/smbdirect/smbdirect.h" 28 #include "transport_rdma.h" 29 #include "vfs.h" 30 #include "vfs_cache.h" 31 #include "misc.h" 32 33 #include "server.h" 34 #include "smb_common.h" 35 #include "../common/smb2status.h" 36 #include "ksmbd_work.h" 37 #include "mgmt/user_config.h" 38 #include "mgmt/share_config.h" 39 #include "mgmt/tree_connect.h" 40 #include "mgmt/user_session.h" 41 #include "mgmt/ksmbd_ida.h" 42 #include "ndr.h" 43 #include "stats.h" 44 #include "transport_tcp.h" 45 46 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) 47 { 48 if (work->next_smb2_rcv_hdr_off) { 49 *req = ksmbd_req_buf_next(work); 50 *rsp = ksmbd_resp_buf_next(work); 51 } else { 52 *req = smb_get_msg(work->request_buf); 53 *rsp = smb_get_msg(work->response_buf); 54 } 55 } 56 57 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) 58 59 /** 60 * check_session_id() - check for valid session id in smb header 61 * @conn: connection instance 62 * @id: session id from smb header 63 * 64 * Return: 1 if valid session id, otherwise 0 65 */ 66 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) 67 { 68 struct ksmbd_session *sess; 69 70 if (id == 0 || id == -1) 71 return false; 72 73 sess = ksmbd_session_lookup_all(conn, id); 74 if (sess) { 75 ksmbd_user_session_put(sess); 76 return true; 77 } 78 pr_err("Invalid user session id: %llu\n", id); 79 return false; 80 } 81 82 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) 83 { 84 struct channel *chann; 85 86 down_read(&sess->chann_lock); 87 chann = xa_load(&sess->ksmbd_chann_list, (long)conn); 88 up_read(&sess->chann_lock); 89 90 return chann; 91 } 92 93 /** 94 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. 95 * @work: smb work 96 * 97 * Return: 0 if there is a tree connection matched or these are 98 * skipable commands, otherwise error 99 */ 100 int smb2_get_ksmbd_tcon(struct ksmbd_work *work) 101 { 102 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 103 unsigned int cmd = le16_to_cpu(req_hdr->Command); 104 unsigned int tree_id; 105 106 if (cmd == SMB2_TREE_CONNECT_HE || 107 cmd == SMB2_CANCEL_HE || 108 cmd == SMB2_LOGOFF_HE) { 109 ksmbd_debug(SMB, "skip to check tree connect request\n"); 110 return 0; 111 } 112 113 if (xa_empty(&work->sess->tree_conns)) { 114 ksmbd_debug(SMB, "NO tree connected\n"); 115 return -ENOENT; 116 } 117 118 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 119 120 /* 121 * If request is not the first in Compound request, 122 * Just validate tree id in header with work->tcon->id. 123 */ 124 if (work->next_smb2_rcv_hdr_off) { 125 if (!work->tcon) { 126 pr_err("The first operation in the compound does not have tcon\n"); 127 return -EINVAL; 128 } 129 if (work->tcon->t_state != TREE_CONNECTED) 130 return -ENOENT; 131 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 132 pr_err("tree id(%u) is different with id(%u) in first operation\n", 133 tree_id, work->tcon->id); 134 return -EINVAL; 135 } 136 return 1; 137 } 138 139 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 140 if (!work->tcon) { 141 pr_err("Invalid tid %d\n", tree_id); 142 return -ENOENT; 143 } 144 145 return 1; 146 } 147 148 /** 149 * smb2_set_err_rsp() - set error response code on smb response 150 * @work: smb work containing response buffer 151 */ 152 void smb2_set_err_rsp(struct ksmbd_work *work) 153 { 154 struct smb2_err_rsp *err_rsp; 155 156 if (work->next_smb2_rcv_hdr_off) 157 err_rsp = ksmbd_resp_buf_next(work); 158 else 159 err_rsp = smb_get_msg(work->response_buf); 160 161 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 162 int err; 163 164 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 165 err_rsp->ErrorContextCount = 0; 166 err_rsp->Reserved = 0; 167 err_rsp->ByteCount = 0; 168 err_rsp->ErrorData[0] = 0; 169 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, 170 __SMB2_HEADER_STRUCTURE_SIZE + 171 SMB2_ERROR_STRUCTURE_SIZE2); 172 if (err) 173 work->send_no_response = 1; 174 } 175 } 176 177 /** 178 * is_smb2_neg_cmd() - is it smb2 negotiation command 179 * @work: smb work containing smb header 180 * 181 * Return: true if smb2 negotiation command, otherwise false 182 */ 183 bool is_smb2_neg_cmd(struct ksmbd_work *work) 184 { 185 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 186 187 /* is it SMB2 header ? */ 188 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 189 return false; 190 191 /* make sure it is request not response message */ 192 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 193 return false; 194 195 if (hdr->Command != SMB2_NEGOTIATE) 196 return false; 197 198 return true; 199 } 200 201 /** 202 * is_smb2_rsp() - is it smb2 response 203 * @work: smb work containing smb response buffer 204 * 205 * Return: true if smb2 response, otherwise false 206 */ 207 bool is_smb2_rsp(struct ksmbd_work *work) 208 { 209 struct smb2_hdr *hdr = smb_get_msg(work->response_buf); 210 211 /* is it SMB2 header ? */ 212 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 213 return false; 214 215 /* make sure it is response not request message */ 216 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 217 return false; 218 219 return true; 220 } 221 222 /** 223 * get_smb2_cmd_val() - get smb command code from smb header 224 * @work: smb work containing smb request buffer 225 * 226 * Return: smb2 request command value 227 */ 228 u16 get_smb2_cmd_val(struct ksmbd_work *work) 229 { 230 struct smb2_hdr *rcv_hdr; 231 232 if (work->next_smb2_rcv_hdr_off) 233 rcv_hdr = ksmbd_req_buf_next(work); 234 else 235 rcv_hdr = smb_get_msg(work->request_buf); 236 return le16_to_cpu(rcv_hdr->Command); 237 } 238 239 /** 240 * set_smb2_rsp_status() - set error response code on smb2 header 241 * @work: smb work containing response buffer 242 * @err: error response code 243 */ 244 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 245 { 246 struct smb2_hdr *rsp_hdr; 247 248 rsp_hdr = smb_get_msg(work->response_buf); 249 rsp_hdr->Status = err; 250 251 work->iov_idx = 0; 252 work->iov_cnt = 0; 253 work->next_smb2_rcv_hdr_off = 0; 254 smb2_set_err_rsp(work); 255 } 256 257 /** 258 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 259 * @work: smb work containing smb request buffer 260 * 261 * smb2 negotiate response is sent in reply of smb1 negotiate command for 262 * dialect auto-negotiation. 263 */ 264 int init_smb2_neg_rsp(struct ksmbd_work *work) 265 { 266 struct smb2_hdr *rsp_hdr; 267 struct smb2_negotiate_rsp *rsp; 268 struct ksmbd_conn *conn = work->conn; 269 int err; 270 271 rsp_hdr = smb_get_msg(work->response_buf); 272 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 273 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 274 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 275 rsp_hdr->CreditRequest = cpu_to_le16(2); 276 rsp_hdr->Command = SMB2_NEGOTIATE; 277 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 278 rsp_hdr->NextCommand = 0; 279 rsp_hdr->MessageId = 0; 280 rsp_hdr->Id.SyncId.ProcessId = 0; 281 rsp_hdr->Id.SyncId.TreeId = 0; 282 rsp_hdr->SessionId = 0; 283 memset(rsp_hdr->Signature, 0, 16); 284 285 rsp = smb_get_msg(work->response_buf); 286 287 WARN_ON(ksmbd_conn_good(conn)); 288 289 rsp->StructureSize = cpu_to_le16(65); 290 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 291 rsp->DialectRevision = cpu_to_le16(conn->dialect); 292 /* Not setting conn guid rsp->ServerGUID, as it 293 * not used by client for identifying connection 294 */ 295 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 296 /* Default Max Message Size till SMB2.0, 64K*/ 297 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 298 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 299 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 300 301 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 302 rsp->ServerStartTime = 0; 303 304 rsp->SecurityBufferOffset = cpu_to_le16(128); 305 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 306 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 307 le16_to_cpu(rsp->SecurityBufferOffset)); 308 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 309 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 310 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 311 err = ksmbd_iov_pin_rsp(work, rsp, 312 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); 313 if (err) 314 return err; 315 conn->use_spnego = true; 316 317 ksmbd_conn_set_need_negotiate(conn); 318 return 0; 319 } 320 321 /** 322 * smb2_set_rsp_credits() - set number of credits in response buffer 323 * @work: smb work containing smb response buffer 324 */ 325 int smb2_set_rsp_credits(struct ksmbd_work *work) 326 { 327 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 328 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 329 struct ksmbd_conn *conn = work->conn; 330 unsigned short credits_requested, aux_max; 331 unsigned short credit_charge, credits_granted = 0; 332 333 if (work->send_no_response) 334 return 0; 335 336 hdr->CreditCharge = req_hdr->CreditCharge; 337 338 if (conn->total_credits > conn->vals->max_credits) { 339 hdr->CreditRequest = 0; 340 pr_err("Total credits overflow: %d\n", conn->total_credits); 341 return -EINVAL; 342 } 343 344 credit_charge = max_t(unsigned short, 345 le16_to_cpu(req_hdr->CreditCharge), 1); 346 if (credit_charge > conn->total_credits) { 347 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 348 credit_charge, conn->total_credits); 349 return -EINVAL; 350 } 351 352 conn->total_credits -= credit_charge; 353 conn->outstanding_credits -= credit_charge; 354 credits_requested = max_t(unsigned short, 355 le16_to_cpu(req_hdr->CreditRequest), 1); 356 357 /* according to smb2.credits smbtorture, Windows server 358 * 2016 or later grant up to 8192 credits at once. 359 * 360 * TODO: Need to adjuct CreditRequest value according to 361 * current cpu load 362 */ 363 if (hdr->Command == SMB2_NEGOTIATE) 364 aux_max = 1; 365 else 366 aux_max = conn->vals->max_credits - conn->total_credits; 367 credits_granted = min_t(unsigned short, credits_requested, aux_max); 368 369 conn->total_credits += credits_granted; 370 work->credits_granted += credits_granted; 371 372 if (!req_hdr->NextCommand) { 373 /* Update CreditRequest in last request */ 374 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 375 } 376 ksmbd_debug(SMB, 377 "credits: requested[%d] granted[%d] total_granted[%d]\n", 378 credits_requested, credits_granted, 379 conn->total_credits); 380 return 0; 381 } 382 383 /** 384 * init_chained_smb2_rsp() - initialize smb2 chained response 385 * @work: smb work containing smb response buffer 386 */ 387 static void init_chained_smb2_rsp(struct ksmbd_work *work) 388 { 389 struct smb2_hdr *req = ksmbd_req_buf_next(work); 390 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 391 struct smb2_hdr *rsp_hdr; 392 struct smb2_hdr *rcv_hdr; 393 int next_hdr_offset = 0; 394 int len, new_len; 395 396 /* Len of this response = updated RFC len - offset of previous cmd 397 * in the compound rsp 398 */ 399 400 /* Storing the current local FID which may be needed by subsequent 401 * command in the compound request 402 */ 403 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 404 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 405 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 406 work->compound_sid = le64_to_cpu(rsp->SessionId); 407 } 408 409 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 410 next_hdr_offset = le32_to_cpu(req->NextCommand); 411 412 new_len = ALIGN(len, 8); 413 work->iov[work->iov_idx].iov_len += (new_len - len); 414 inc_rfc1001_len(work->response_buf, new_len - len); 415 rsp->NextCommand = cpu_to_le32(new_len); 416 417 work->next_smb2_rcv_hdr_off += next_hdr_offset; 418 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 419 work->next_smb2_rsp_hdr_off += new_len; 420 ksmbd_debug(SMB, 421 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 422 new_len, work->next_smb2_rcv_hdr_off, 423 work->next_smb2_rsp_hdr_off); 424 425 rsp_hdr = ksmbd_resp_buf_next(work); 426 rcv_hdr = ksmbd_req_buf_next(work); 427 428 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 429 ksmbd_debug(SMB, "related flag should be set\n"); 430 work->compound_fid = KSMBD_NO_FID; 431 work->compound_pfid = KSMBD_NO_FID; 432 } 433 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 434 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 435 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 436 rsp_hdr->Command = rcv_hdr->Command; 437 438 /* 439 * Message is response. We don't grant oplock yet. 440 */ 441 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 442 SMB2_FLAGS_RELATED_OPERATIONS); 443 rsp_hdr->NextCommand = 0; 444 rsp_hdr->MessageId = rcv_hdr->MessageId; 445 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 446 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 447 rsp_hdr->SessionId = rcv_hdr->SessionId; 448 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 449 } 450 451 /** 452 * is_chained_smb2_message() - check for chained command 453 * @work: smb work containing smb request buffer 454 * 455 * Return: true if chained request, otherwise false 456 */ 457 bool is_chained_smb2_message(struct ksmbd_work *work) 458 { 459 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 460 unsigned int len, next_cmd; 461 462 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 463 return false; 464 465 hdr = ksmbd_req_buf_next(work); 466 next_cmd = le32_to_cpu(hdr->NextCommand); 467 if (next_cmd > 0) { 468 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 469 __SMB2_HEADER_STRUCTURE_SIZE > 470 get_rfc1002_len(work->request_buf)) { 471 pr_err("next command(%u) offset exceeds smb msg size\n", 472 next_cmd); 473 return false; 474 } 475 476 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 477 work->response_sz) { 478 pr_err("next response offset exceeds response buffer size\n"); 479 return false; 480 } 481 482 ksmbd_debug(SMB, "got SMB2 chained command\n"); 483 init_chained_smb2_rsp(work); 484 return true; 485 } else if (work->next_smb2_rcv_hdr_off) { 486 /* 487 * This is last request in chained command, 488 * align response to 8 byte 489 */ 490 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 491 len = len - get_rfc1002_len(work->response_buf); 492 if (len) { 493 ksmbd_debug(SMB, "padding len %u\n", len); 494 work->iov[work->iov_idx].iov_len += len; 495 inc_rfc1001_len(work->response_buf, len); 496 } 497 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 498 } 499 return false; 500 } 501 502 /** 503 * init_smb2_rsp_hdr() - initialize smb2 response 504 * @work: smb work containing smb request buffer 505 * 506 * Return: 0 507 */ 508 int init_smb2_rsp_hdr(struct ksmbd_work *work) 509 { 510 struct smb2_hdr *rsp_hdr = smb_get_msg(work->response_buf); 511 struct smb2_hdr *rcv_hdr = smb_get_msg(work->request_buf); 512 513 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 514 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 515 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 516 rsp_hdr->Command = rcv_hdr->Command; 517 518 /* 519 * Message is response. We don't grant oplock yet. 520 */ 521 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 522 rsp_hdr->NextCommand = 0; 523 rsp_hdr->MessageId = rcv_hdr->MessageId; 524 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 525 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 526 rsp_hdr->SessionId = rcv_hdr->SessionId; 527 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 528 529 return 0; 530 } 531 532 /** 533 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 534 * @work: smb work containing smb request buffer 535 * 536 * Return: 0 on success, otherwise error 537 */ 538 int smb2_allocate_rsp_buf(struct ksmbd_work *work) 539 { 540 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 541 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 542 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 543 size_t sz = small_sz; 544 int cmd = le16_to_cpu(hdr->Command); 545 546 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 547 sz = large_sz; 548 549 if (cmd == SMB2_QUERY_INFO_HE) { 550 struct smb2_query_info_req *req; 551 552 if (get_rfc1002_len(work->request_buf) < 553 offsetof(struct smb2_query_info_req, OutputBufferLength)) 554 return -EINVAL; 555 556 req = smb_get_msg(work->request_buf); 557 if ((req->InfoType == SMB2_O_INFO_FILE && 558 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 559 req->FileInfoClass == FILE_ALL_INFORMATION)) || 560 req->InfoType == SMB2_O_INFO_SECURITY) 561 sz = large_sz; 562 } 563 564 /* allocate large response buf for chained commands */ 565 if (le32_to_cpu(hdr->NextCommand) > 0) 566 sz = large_sz; 567 568 work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP); 569 if (!work->response_buf) 570 return -ENOMEM; 571 572 work->response_sz = sz; 573 return 0; 574 } 575 576 /** 577 * smb2_check_user_session() - check for valid session for a user 578 * @work: smb work containing smb request buffer 579 * 580 * Return: 0 on success, otherwise error 581 */ 582 int smb2_check_user_session(struct ksmbd_work *work) 583 { 584 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 585 struct ksmbd_conn *conn = work->conn; 586 unsigned int cmd = le16_to_cpu(req_hdr->Command); 587 unsigned long long sess_id; 588 589 /* 590 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 591 * require a session id, so no need to validate user session's for 592 * these commands. 593 */ 594 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 595 cmd == SMB2_SESSION_SETUP_HE) 596 return 0; 597 598 if (!ksmbd_conn_good(conn)) 599 return -EIO; 600 601 sess_id = le64_to_cpu(req_hdr->SessionId); 602 603 /* 604 * If request is not the first in Compound request, 605 * Just validate session id in header with work->sess->id. 606 */ 607 if (work->next_smb2_rcv_hdr_off) { 608 if (!work->sess) { 609 pr_err("The first operation in the compound does not have sess\n"); 610 return -EINVAL; 611 } 612 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 613 pr_err("session id(%llu) is different with the first operation(%lld)\n", 614 sess_id, work->sess->id); 615 return -EINVAL; 616 } 617 return 1; 618 } 619 620 /* Check for validity of user session */ 621 work->sess = ksmbd_session_lookup_all(conn, sess_id); 622 if (work->sess) 623 return 1; 624 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 625 return -ENOENT; 626 } 627 628 /** 629 * smb2_get_name() - get filename string from on the wire smb format 630 * @src: source buffer 631 * @maxlen: maxlen of source string 632 * @local_nls: nls_table pointer 633 * 634 * Return: matching converted filename on success, otherwise error ptr 635 */ 636 static char * 637 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 638 { 639 char *name; 640 641 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 642 if (IS_ERR(name)) { 643 pr_err("failed to get name %ld\n", PTR_ERR(name)); 644 return name; 645 } 646 647 if (*name == '\0') { 648 kfree(name); 649 return ERR_PTR(-EINVAL); 650 } 651 652 if (*name == '\\') { 653 pr_err("not allow directory name included leading slash\n"); 654 kfree(name); 655 return ERR_PTR(-EINVAL); 656 } 657 658 ksmbd_conv_path_to_unix(name); 659 ksmbd_strip_last_slash(name); 660 return name; 661 } 662 663 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 664 { 665 struct ksmbd_conn *conn = work->conn; 666 int id; 667 668 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 669 if (id < 0) { 670 pr_err("Failed to alloc async message id\n"); 671 return id; 672 } 673 work->asynchronous = true; 674 work->async_id = id; 675 676 ksmbd_debug(SMB, 677 "Send interim Response to inform async request id : %d\n", 678 work->async_id); 679 680 work->cancel_fn = fn; 681 work->cancel_argv = arg; 682 683 if (list_empty(&work->async_request_entry)) { 684 spin_lock(&conn->request_lock); 685 list_add_tail(&work->async_request_entry, &conn->async_requests); 686 spin_unlock(&conn->request_lock); 687 } 688 689 return 0; 690 } 691 692 void release_async_work(struct ksmbd_work *work) 693 { 694 struct ksmbd_conn *conn = work->conn; 695 696 spin_lock(&conn->request_lock); 697 list_del_init(&work->async_request_entry); 698 spin_unlock(&conn->request_lock); 699 700 work->asynchronous = 0; 701 work->cancel_fn = NULL; 702 kfree(work->cancel_argv); 703 work->cancel_argv = NULL; 704 if (work->async_id) { 705 ksmbd_release_id(&conn->async_ida, work->async_id); 706 work->async_id = 0; 707 } 708 } 709 710 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 711 { 712 struct smb2_hdr *rsp_hdr; 713 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 714 715 if (!in_work) 716 return; 717 718 if (allocate_interim_rsp_buf(in_work)) { 719 pr_err("smb_allocate_rsp_buf failed!\n"); 720 ksmbd_free_work_struct(in_work); 721 return; 722 } 723 724 in_work->conn = work->conn; 725 memcpy(smb_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 726 __SMB2_HEADER_STRUCTURE_SIZE); 727 728 rsp_hdr = smb_get_msg(in_work->response_buf); 729 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 730 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); 731 smb2_set_err_rsp(in_work); 732 rsp_hdr->Status = status; 733 734 ksmbd_conn_write(in_work); 735 ksmbd_free_work_struct(in_work); 736 } 737 738 static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 739 { 740 if (S_ISDIR(mode) || S_ISREG(mode)) 741 return 0; 742 743 if (S_ISLNK(mode)) 744 return IO_REPARSE_TAG_LX_SYMLINK_LE; 745 else if (S_ISFIFO(mode)) 746 return IO_REPARSE_TAG_LX_FIFO_LE; 747 else if (S_ISSOCK(mode)) 748 return IO_REPARSE_TAG_AF_UNIX_LE; 749 else if (S_ISCHR(mode)) 750 return IO_REPARSE_TAG_LX_CHR_LE; 751 else if (S_ISBLK(mode)) 752 return IO_REPARSE_TAG_LX_BLK_LE; 753 754 return 0; 755 } 756 757 /** 758 * smb2_get_dos_mode() - get file mode in dos format from unix mode 759 * @stat: kstat containing file mode 760 * @attribute: attribute flags 761 * 762 * Return: converted dos mode 763 */ 764 static int smb2_get_dos_mode(struct kstat *stat, int attribute) 765 { 766 int attr = 0; 767 768 if (S_ISDIR(stat->mode)) { 769 attr = FILE_ATTRIBUTE_DIRECTORY | 770 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 771 } else { 772 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 773 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 774 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 775 FILE_SUPPORTS_SPARSE_FILES)) 776 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 777 778 if (smb2_get_reparse_tag_special_file(stat->mode)) 779 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 780 } 781 782 return attr; 783 } 784 785 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 786 __le16 hash_id) 787 { 788 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 789 pneg_ctxt->DataLength = cpu_to_le16(38); 790 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 791 pneg_ctxt->Reserved = cpu_to_le32(0); 792 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 793 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 794 pneg_ctxt->HashAlgorithms = hash_id; 795 } 796 797 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 798 __le16 cipher_type) 799 { 800 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 801 pneg_ctxt->DataLength = cpu_to_le16(4); 802 pneg_ctxt->Reserved = cpu_to_le32(0); 803 pneg_ctxt->CipherCount = cpu_to_le16(1); 804 pneg_ctxt->Ciphers[0] = cipher_type; 805 } 806 807 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 808 __le16 sign_algo) 809 { 810 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 811 pneg_ctxt->DataLength = 812 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 813 - sizeof(struct smb2_neg_context)); 814 pneg_ctxt->Reserved = cpu_to_le32(0); 815 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 816 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 817 } 818 819 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 820 { 821 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 822 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 823 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 824 pneg_ctxt->Name[0] = 0x93; 825 pneg_ctxt->Name[1] = 0xAD; 826 pneg_ctxt->Name[2] = 0x25; 827 pneg_ctxt->Name[3] = 0x50; 828 pneg_ctxt->Name[4] = 0x9C; 829 pneg_ctxt->Name[5] = 0xB4; 830 pneg_ctxt->Name[6] = 0x11; 831 pneg_ctxt->Name[7] = 0xE7; 832 pneg_ctxt->Name[8] = 0xB4; 833 pneg_ctxt->Name[9] = 0x23; 834 pneg_ctxt->Name[10] = 0x83; 835 pneg_ctxt->Name[11] = 0xDE; 836 pneg_ctxt->Name[12] = 0x96; 837 pneg_ctxt->Name[13] = 0x8B; 838 pneg_ctxt->Name[14] = 0xCD; 839 pneg_ctxt->Name[15] = 0x7C; 840 } 841 842 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 843 struct smb2_negotiate_rsp *rsp) 844 { 845 char * const pneg_ctxt = (char *)rsp + 846 le32_to_cpu(rsp->NegotiateContextOffset); 847 int neg_ctxt_cnt = 1; 848 int ctxt_size; 849 850 ksmbd_debug(SMB, 851 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 852 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 853 conn->preauth_info->Preauth_HashId); 854 ctxt_size = sizeof(struct smb2_preauth_neg_context); 855 856 if (conn->cipher_type) { 857 /* Round to 8 byte boundary */ 858 ctxt_size = round_up(ctxt_size, 8); 859 ksmbd_debug(SMB, 860 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 861 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 862 (pneg_ctxt + ctxt_size), 863 conn->cipher_type); 864 neg_ctxt_cnt++; 865 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 866 } 867 868 /* compression context not yet supported */ 869 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 870 871 if (conn->posix_ext_supported) { 872 ctxt_size = round_up(ctxt_size, 8); 873 ksmbd_debug(SMB, 874 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 875 build_posix_ctxt((struct smb2_posix_neg_context *) 876 (pneg_ctxt + ctxt_size)); 877 neg_ctxt_cnt++; 878 ctxt_size += sizeof(struct smb2_posix_neg_context); 879 } 880 881 if (conn->signing_negotiated) { 882 ctxt_size = round_up(ctxt_size, 8); 883 ksmbd_debug(SMB, 884 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 885 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 886 (pneg_ctxt + ctxt_size), 887 conn->signing_algorithm); 888 neg_ctxt_cnt++; 889 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 890 } 891 892 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 893 return ctxt_size + AUTH_GSS_PADDING; 894 } 895 896 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 897 struct smb2_preauth_neg_context *pneg_ctxt, 898 int ctxt_len) 899 { 900 /* 901 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 902 * which may not be present. Only check for used HashAlgorithms[1]. 903 */ 904 if (ctxt_len < 905 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 906 return STATUS_INVALID_PARAMETER; 907 908 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 909 return STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 910 911 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 912 return STATUS_SUCCESS; 913 } 914 915 static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 916 struct smb2_encryption_neg_context *pneg_ctxt, 917 int ctxt_len) 918 { 919 int cph_cnt; 920 int i, cphs_size; 921 922 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 923 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 924 return; 925 } 926 927 conn->cipher_type = 0; 928 929 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 930 cphs_size = cph_cnt * sizeof(__le16); 931 932 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 933 ctxt_len) { 934 pr_err("Invalid cipher count(%d)\n", cph_cnt); 935 return; 936 } 937 938 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 939 return; 940 941 for (i = 0; i < cph_cnt; i++) { 942 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 943 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 944 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 945 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 946 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 947 pneg_ctxt->Ciphers[i]); 948 conn->cipher_type = pneg_ctxt->Ciphers[i]; 949 break; 950 } 951 } 952 } 953 954 /** 955 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 956 * @conn: smb connection 957 * 958 * Return: true if connection should be encrypted, else false 959 */ 960 bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 961 { 962 if (!conn->ops->generate_encryptionkey) 963 return false; 964 965 /* 966 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 967 * SMB 3.1.1 uses the cipher_type field. 968 */ 969 return (conn->vals->req_capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 970 conn->cipher_type; 971 } 972 973 static void decode_compress_ctxt(struct ksmbd_conn *conn, 974 struct smb2_compression_capabilities_context *pneg_ctxt) 975 { 976 conn->compress_algorithm = SMB3_COMPRESS_NONE; 977 } 978 979 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 980 struct smb2_signing_capabilities *pneg_ctxt, 981 int ctxt_len) 982 { 983 int sign_algo_cnt; 984 int i, sign_alos_size; 985 986 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 987 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 988 return; 989 } 990 991 conn->signing_negotiated = false; 992 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 993 sign_alos_size = sign_algo_cnt * sizeof(__le16); 994 995 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 996 ctxt_len) { 997 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 998 return; 999 } 1000 1001 for (i = 0; i < sign_algo_cnt; i++) { 1002 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 1003 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 1004 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 1005 pneg_ctxt->SigningAlgorithms[i]); 1006 conn->signing_negotiated = true; 1007 conn->signing_algorithm = 1008 pneg_ctxt->SigningAlgorithms[i]; 1009 break; 1010 } 1011 } 1012 } 1013 1014 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 1015 struct smb2_negotiate_req *req, 1016 unsigned int len_of_smb) 1017 { 1018 /* +4 is to account for the RFC1001 len field */ 1019 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1020 int i = 0, len_of_ctxts; 1021 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1022 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1023 __le32 status = STATUS_INVALID_PARAMETER; 1024 1025 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1026 if (len_of_smb <= offset) { 1027 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1028 return status; 1029 } 1030 1031 len_of_ctxts = len_of_smb - offset; 1032 1033 while (i++ < neg_ctxt_cnt) { 1034 int clen, ctxt_len; 1035 1036 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1037 break; 1038 1039 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1040 clen = le16_to_cpu(pctx->DataLength); 1041 ctxt_len = clen + sizeof(struct smb2_neg_context); 1042 1043 if (ctxt_len > len_of_ctxts) 1044 break; 1045 1046 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1047 ksmbd_debug(SMB, 1048 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1049 if (conn->preauth_info->Preauth_HashId) 1050 break; 1051 1052 status = decode_preauth_ctxt(conn, 1053 (struct smb2_preauth_neg_context *)pctx, 1054 ctxt_len); 1055 if (status != STATUS_SUCCESS) 1056 break; 1057 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1058 ksmbd_debug(SMB, 1059 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1060 if (conn->cipher_type) 1061 break; 1062 1063 decode_encrypt_ctxt(conn, 1064 (struct smb2_encryption_neg_context *)pctx, 1065 ctxt_len); 1066 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1067 ksmbd_debug(SMB, 1068 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1069 if (conn->compress_algorithm) 1070 break; 1071 1072 decode_compress_ctxt(conn, 1073 (struct smb2_compression_capabilities_context *)pctx); 1074 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1075 ksmbd_debug(SMB, 1076 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1077 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1078 ksmbd_debug(SMB, 1079 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1080 conn->posix_ext_supported = true; 1081 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1082 ksmbd_debug(SMB, 1083 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1084 1085 decode_sign_cap_ctxt(conn, 1086 (struct smb2_signing_capabilities *)pctx, 1087 ctxt_len); 1088 } 1089 1090 /* offsets must be 8 byte aligned */ 1091 offset = (ctxt_len + 7) & ~0x7; 1092 len_of_ctxts -= offset; 1093 } 1094 return status; 1095 } 1096 1097 /** 1098 * smb2_handle_negotiate() - handler for smb2 negotiate command 1099 * @work: smb work containing smb request buffer 1100 * 1101 * Return: 0 1102 */ 1103 int smb2_handle_negotiate(struct ksmbd_work *work) 1104 { 1105 struct ksmbd_conn *conn = work->conn; 1106 struct smb2_negotiate_req *req = smb_get_msg(work->request_buf); 1107 struct smb2_negotiate_rsp *rsp = smb_get_msg(work->response_buf); 1108 int rc = 0; 1109 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1110 __le32 status; 1111 1112 ksmbd_debug(SMB, "Received negotiate request\n"); 1113 conn->need_neg = false; 1114 if (ksmbd_conn_good(conn)) { 1115 pr_err("conn->tcp_status is already in CifsGood State\n"); 1116 work->send_no_response = 1; 1117 return rc; 1118 } 1119 1120 ksmbd_conn_lock(conn); 1121 smb2_buf_len = get_rfc1002_len(work->request_buf); 1122 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1123 if (smb2_neg_size > smb2_buf_len) { 1124 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1125 rc = -EINVAL; 1126 goto err_out; 1127 } 1128 1129 if (req->DialectCount == 0) { 1130 pr_err("malformed packet\n"); 1131 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1132 rc = -EINVAL; 1133 goto err_out; 1134 } 1135 1136 if (conn->dialect == SMB311_PROT_ID) { 1137 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1138 1139 if (smb2_buf_len < nego_ctxt_off) { 1140 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1141 rc = -EINVAL; 1142 goto err_out; 1143 } 1144 1145 if (smb2_neg_size > nego_ctxt_off) { 1146 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1147 rc = -EINVAL; 1148 goto err_out; 1149 } 1150 1151 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1152 nego_ctxt_off) { 1153 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1154 rc = -EINVAL; 1155 goto err_out; 1156 } 1157 } else { 1158 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1159 smb2_buf_len) { 1160 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1161 rc = -EINVAL; 1162 goto err_out; 1163 } 1164 } 1165 1166 conn->cli_cap = le32_to_cpu(req->Capabilities); 1167 switch (conn->dialect) { 1168 case SMB311_PROT_ID: 1169 conn->preauth_info = 1170 kzalloc_obj(struct preauth_integrity_info, 1171 KSMBD_DEFAULT_GFP); 1172 if (!conn->preauth_info) { 1173 rc = -ENOMEM; 1174 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1175 goto err_out; 1176 } 1177 1178 status = deassemble_neg_contexts(conn, req, 1179 get_rfc1002_len(work->request_buf)); 1180 if (status != STATUS_SUCCESS) { 1181 pr_err("deassemble_neg_contexts error(0x%x)\n", 1182 status); 1183 rsp->hdr.Status = status; 1184 rc = -EINVAL; 1185 kfree(conn->preauth_info); 1186 conn->preauth_info = NULL; 1187 goto err_out; 1188 } 1189 1190 rc = init_smb3_11_server(conn); 1191 if (rc < 0) { 1192 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1193 kfree(conn->preauth_info); 1194 conn->preauth_info = NULL; 1195 goto err_out; 1196 } 1197 1198 ksmbd_gen_preauth_integrity_hash(conn, 1199 work->request_buf, 1200 conn->preauth_info->Preauth_HashValue); 1201 rsp->NegotiateContextOffset = 1202 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1203 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1204 break; 1205 case SMB302_PROT_ID: 1206 init_smb3_02_server(conn); 1207 break; 1208 case SMB30_PROT_ID: 1209 init_smb3_0_server(conn); 1210 break; 1211 case SMB21_PROT_ID: 1212 init_smb2_1_server(conn); 1213 break; 1214 case SMB2X_PROT_ID: 1215 case BAD_PROT_ID: 1216 default: 1217 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1218 conn->dialect); 1219 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1220 rc = -EINVAL; 1221 goto err_out; 1222 } 1223 rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 1224 1225 /* For stats */ 1226 conn->connection_type = conn->dialect; 1227 1228 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1229 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1230 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1231 1232 memcpy(conn->ClientGUID, req->ClientGUID, 1233 SMB2_CLIENT_GUID_SIZE); 1234 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1235 1236 rsp->StructureSize = cpu_to_le16(65); 1237 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1238 /* Not setting conn guid rsp->ServerGUID, as it 1239 * not used by client for identifying server 1240 */ 1241 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1242 1243 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1244 rsp->ServerStartTime = 0; 1245 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1246 le32_to_cpu(rsp->NegotiateContextOffset), 1247 le16_to_cpu(rsp->NegotiateContextCount)); 1248 1249 rsp->SecurityBufferOffset = cpu_to_le16(128); 1250 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1251 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1252 le16_to_cpu(rsp->SecurityBufferOffset)); 1253 1254 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1255 conn->use_spnego = true; 1256 1257 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1258 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1259 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1260 conn->sign = true; 1261 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1262 server_conf.enforced_signing = true; 1263 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1264 conn->sign = true; 1265 } 1266 1267 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1268 ksmbd_conn_set_need_setup(conn); 1269 1270 err_out: 1271 ksmbd_conn_unlock(conn); 1272 if (rc) 1273 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1274 1275 if (!rc) 1276 rc = ksmbd_iov_pin_rsp(work, rsp, 1277 sizeof(struct smb2_negotiate_rsp) + 1278 AUTH_GSS_LENGTH + neg_ctxt_len); 1279 if (rc < 0) 1280 smb2_set_err_rsp(work); 1281 return rc; 1282 } 1283 1284 static int alloc_preauth_hash(struct ksmbd_session *sess, 1285 struct ksmbd_conn *conn) 1286 { 1287 if (sess->Preauth_HashValue) 1288 return 0; 1289 1290 if (!conn->preauth_info) 1291 return -ENOMEM; 1292 1293 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1294 PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP); 1295 if (!sess->Preauth_HashValue) 1296 return -ENOMEM; 1297 1298 return 0; 1299 } 1300 1301 static int generate_preauth_hash(struct ksmbd_work *work) 1302 { 1303 struct ksmbd_conn *conn = work->conn; 1304 struct ksmbd_session *sess = work->sess; 1305 u8 *preauth_hash; 1306 1307 if (conn->dialect != SMB311_PROT_ID) 1308 return 0; 1309 1310 if (conn->binding) { 1311 struct preauth_session *preauth_sess; 1312 1313 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1314 if (!preauth_sess) { 1315 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1316 if (!preauth_sess) 1317 return -ENOMEM; 1318 } 1319 1320 preauth_hash = preauth_sess->Preauth_HashValue; 1321 } else { 1322 if (!sess->Preauth_HashValue) 1323 if (alloc_preauth_hash(sess, conn)) 1324 return -ENOMEM; 1325 preauth_hash = sess->Preauth_HashValue; 1326 } 1327 1328 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1329 return 0; 1330 } 1331 1332 static int decode_negotiation_token(struct ksmbd_conn *conn, 1333 struct negotiate_message *negblob, 1334 size_t sz) 1335 { 1336 if (!conn->use_spnego) 1337 return -EINVAL; 1338 1339 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1340 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1341 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1342 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1343 conn->use_spnego = false; 1344 } 1345 } 1346 return 0; 1347 } 1348 1349 static int ntlm_negotiate(struct ksmbd_work *work, 1350 struct negotiate_message *negblob, 1351 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1352 { 1353 struct challenge_message *chgblob; 1354 unsigned char *spnego_blob = NULL; 1355 u16 spnego_blob_len; 1356 char *neg_blob; 1357 int sz, rc; 1358 1359 ksmbd_debug(SMB, "negotiate phase\n"); 1360 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1361 if (rc) 1362 return rc; 1363 1364 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1365 chgblob = (struct challenge_message *)rsp->Buffer; 1366 memset(chgblob, 0, sizeof(struct challenge_message)); 1367 1368 if (!work->conn->use_spnego) { 1369 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1370 if (sz < 0) 1371 return -ENOMEM; 1372 1373 rsp->SecurityBufferLength = cpu_to_le16(sz); 1374 return 0; 1375 } 1376 1377 sz = sizeof(struct challenge_message); 1378 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1379 1380 neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP); 1381 if (!neg_blob) 1382 return -ENOMEM; 1383 1384 chgblob = (struct challenge_message *)neg_blob; 1385 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1386 if (sz < 0) { 1387 rc = -ENOMEM; 1388 goto out; 1389 } 1390 1391 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1392 neg_blob, sz); 1393 if (rc) { 1394 rc = -ENOMEM; 1395 goto out; 1396 } 1397 1398 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1399 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1400 1401 out: 1402 kfree(spnego_blob); 1403 kfree(neg_blob); 1404 return rc; 1405 } 1406 1407 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1408 struct smb2_sess_setup_req *req) 1409 { 1410 int sz; 1411 1412 if (conn->use_spnego && conn->mechToken) 1413 return (struct authenticate_message *)conn->mechToken; 1414 1415 sz = le16_to_cpu(req->SecurityBufferOffset); 1416 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1417 + sz); 1418 } 1419 1420 static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1421 struct smb2_sess_setup_req *req) 1422 { 1423 struct authenticate_message *authblob; 1424 struct ksmbd_user *user; 1425 char *name; 1426 unsigned int name_off, name_len, secbuf_len; 1427 1428 if (conn->use_spnego && conn->mechToken) 1429 secbuf_len = conn->mechTokenLen; 1430 else 1431 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1432 if (secbuf_len < sizeof(struct authenticate_message)) { 1433 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1434 return NULL; 1435 } 1436 authblob = user_authblob(conn, req); 1437 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1438 name_len = le16_to_cpu(authblob->UserName.Length); 1439 1440 if (secbuf_len < (u64)name_off + name_len) 1441 return NULL; 1442 1443 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1444 name_len, 1445 true, 1446 conn->local_nls); 1447 if (IS_ERR(name)) { 1448 pr_err("cannot allocate memory\n"); 1449 return NULL; 1450 } 1451 1452 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1453 user = ksmbd_login_user(name); 1454 kfree(name); 1455 return user; 1456 } 1457 1458 static int ntlm_authenticate(struct ksmbd_work *work, 1459 struct smb2_sess_setup_req *req, 1460 struct smb2_sess_setup_rsp *rsp) 1461 { 1462 struct ksmbd_conn *conn = work->conn; 1463 struct ksmbd_session *sess = work->sess; 1464 struct channel *chann = NULL, *old; 1465 struct ksmbd_user *user; 1466 u64 prev_id; 1467 int sz, rc; 1468 1469 ksmbd_debug(SMB, "authenticate phase\n"); 1470 if (conn->use_spnego) { 1471 unsigned char *spnego_blob; 1472 u16 spnego_blob_len; 1473 1474 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1475 &spnego_blob_len, 1476 0); 1477 if (rc) 1478 return -ENOMEM; 1479 1480 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); 1481 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1482 kfree(spnego_blob); 1483 } 1484 1485 user = session_user(conn, req); 1486 if (!user) { 1487 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1488 return -EPERM; 1489 } 1490 1491 /* Check for previous session */ 1492 prev_id = le64_to_cpu(req->PreviousSessionId); 1493 if (prev_id && prev_id != sess->id) 1494 destroy_previous_session(conn, user, prev_id); 1495 1496 if (sess->state == SMB2_SESSION_VALID) { 1497 /* 1498 * Reuse session if anonymous try to connect 1499 * on reauthetication. 1500 */ 1501 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1502 ksmbd_free_user(user); 1503 return 0; 1504 } 1505 1506 if (!ksmbd_compare_user(sess->user, user)) { 1507 ksmbd_free_user(user); 1508 return -EPERM; 1509 } 1510 ksmbd_free_user(user); 1511 } else { 1512 sess->user = user; 1513 } 1514 1515 if (conn->binding == false && user_guest(sess->user)) { 1516 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1517 } else { 1518 struct authenticate_message *authblob; 1519 1520 authblob = user_authblob(conn, req); 1521 if (conn->use_spnego && conn->mechToken) 1522 sz = conn->mechTokenLen; 1523 else 1524 sz = le16_to_cpu(req->SecurityBufferLength); 1525 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1526 if (rc) { 1527 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1528 ksmbd_debug(SMB, "authentication failed\n"); 1529 return -EPERM; 1530 } 1531 } 1532 1533 /* 1534 * If session state is SMB2_SESSION_VALID, We can assume 1535 * that it is reauthentication. And the user/password 1536 * has been verified, so return it here. 1537 */ 1538 if (sess->state == SMB2_SESSION_VALID) { 1539 if (conn->binding) 1540 goto binding_session; 1541 return 0; 1542 } 1543 1544 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1545 (conn->sign || server_conf.enforced_signing)) || 1546 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1547 sess->sign = true; 1548 1549 if (smb3_encryption_negotiated(conn) && 1550 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1551 conn->ops->generate_encryptionkey(conn, sess); 1552 sess->enc = true; 1553 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1554 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1555 /* 1556 * signing is disable if encryption is enable 1557 * on this session 1558 */ 1559 sess->sign = false; 1560 } 1561 1562 binding_session: 1563 if (conn->dialect >= SMB30_PROT_ID) { 1564 chann = lookup_chann_list(sess, conn); 1565 if (!chann) { 1566 chann = kmalloc_obj(struct channel, KSMBD_DEFAULT_GFP); 1567 if (!chann) 1568 return -ENOMEM; 1569 1570 chann->conn = conn; 1571 down_write(&sess->chann_lock); 1572 old = xa_store(&sess->ksmbd_chann_list, (long)conn, chann, 1573 KSMBD_DEFAULT_GFP); 1574 up_write(&sess->chann_lock); 1575 if (xa_is_err(old)) { 1576 kfree(chann); 1577 return xa_err(old); 1578 } 1579 } 1580 } 1581 1582 if (conn->ops->generate_signingkey) { 1583 rc = conn->ops->generate_signingkey(sess, conn); 1584 if (rc) { 1585 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1586 return -EINVAL; 1587 } 1588 } 1589 1590 if (!ksmbd_conn_lookup_dialect(conn)) { 1591 pr_err("fail to verify the dialect\n"); 1592 return -ENOENT; 1593 } 1594 return 0; 1595 } 1596 1597 #ifdef CONFIG_SMB_SERVER_KERBEROS5 1598 static int krb5_authenticate(struct ksmbd_work *work, 1599 struct smb2_sess_setup_req *req, 1600 struct smb2_sess_setup_rsp *rsp) 1601 { 1602 struct ksmbd_conn *conn = work->conn; 1603 struct ksmbd_session *sess = work->sess; 1604 char *in_blob, *out_blob; 1605 struct channel *chann = NULL, *old; 1606 u64 prev_sess_id; 1607 int in_len, out_len; 1608 int retval; 1609 1610 in_blob = (char *)&req->hdr.ProtocolId + 1611 le16_to_cpu(req->SecurityBufferOffset); 1612 in_len = le16_to_cpu(req->SecurityBufferLength); 1613 out_blob = (char *)&rsp->hdr.ProtocolId + 1614 le16_to_cpu(rsp->SecurityBufferOffset); 1615 out_len = work->response_sz - 1616 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1617 1618 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1619 out_blob, &out_len); 1620 if (retval) { 1621 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1622 return -EINVAL; 1623 } 1624 1625 /* Check previous session */ 1626 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1627 if (prev_sess_id && prev_sess_id != sess->id) 1628 destroy_previous_session(conn, sess->user, prev_sess_id); 1629 1630 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1631 1632 /* 1633 * If session state is SMB2_SESSION_VALID, We can assume 1634 * that it is reauthentication. And the user/password 1635 * has been verified, so return it here. 1636 */ 1637 if (sess->state == SMB2_SESSION_VALID) { 1638 if (conn->binding) 1639 goto binding_session; 1640 return 0; 1641 } 1642 1643 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1644 (conn->sign || server_conf.enforced_signing)) || 1645 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1646 sess->sign = true; 1647 1648 if (smb3_encryption_negotiated(conn) && 1649 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1650 conn->ops->generate_encryptionkey(conn, sess); 1651 sess->enc = true; 1652 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1653 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1654 sess->sign = false; 1655 } 1656 1657 binding_session: 1658 if (conn->dialect >= SMB30_PROT_ID) { 1659 chann = lookup_chann_list(sess, conn); 1660 if (!chann) { 1661 chann = kmalloc_obj(struct channel, KSMBD_DEFAULT_GFP); 1662 if (!chann) 1663 return -ENOMEM; 1664 1665 chann->conn = conn; 1666 down_write(&sess->chann_lock); 1667 old = xa_store(&sess->ksmbd_chann_list, (long)conn, 1668 chann, KSMBD_DEFAULT_GFP); 1669 up_write(&sess->chann_lock); 1670 if (xa_is_err(old)) { 1671 kfree(chann); 1672 return xa_err(old); 1673 } 1674 } 1675 } 1676 1677 if (conn->ops->generate_signingkey) { 1678 retval = conn->ops->generate_signingkey(sess, conn); 1679 if (retval) { 1680 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1681 return -EINVAL; 1682 } 1683 } 1684 1685 if (!ksmbd_conn_lookup_dialect(conn)) { 1686 pr_err("fail to verify the dialect\n"); 1687 return -ENOENT; 1688 } 1689 return 0; 1690 } 1691 #else 1692 static int krb5_authenticate(struct ksmbd_work *work, 1693 struct smb2_sess_setup_req *req, 1694 struct smb2_sess_setup_rsp *rsp) 1695 { 1696 return -EOPNOTSUPP; 1697 } 1698 #endif 1699 1700 int smb2_sess_setup(struct ksmbd_work *work) 1701 { 1702 struct ksmbd_conn *conn = work->conn; 1703 struct smb2_sess_setup_req *req; 1704 struct smb2_sess_setup_rsp *rsp; 1705 struct ksmbd_session *sess; 1706 struct negotiate_message *negblob; 1707 unsigned int negblob_len, negblob_off; 1708 int rc = 0; 1709 1710 ksmbd_debug(SMB, "Received smb2 session setup request\n"); 1711 1712 if (!ksmbd_conn_need_setup(conn) && !ksmbd_conn_good(conn)) { 1713 work->send_no_response = 1; 1714 return rc; 1715 } 1716 1717 WORK_BUFFERS(work, req, rsp); 1718 1719 rsp->StructureSize = cpu_to_le16(9); 1720 rsp->SessionFlags = 0; 1721 rsp->SecurityBufferOffset = cpu_to_le16(72); 1722 rsp->SecurityBufferLength = 0; 1723 1724 ksmbd_conn_lock(conn); 1725 if (!req->hdr.SessionId) { 1726 sess = ksmbd_smb2_session_create(); 1727 if (!sess) { 1728 rc = -ENOMEM; 1729 goto out_err; 1730 } 1731 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1732 rc = ksmbd_session_register(conn, sess); 1733 if (rc) 1734 goto out_err; 1735 1736 conn->binding = false; 1737 } else if (conn->dialect >= SMB30_PROT_ID && 1738 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1739 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1740 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1741 1742 sess = ksmbd_session_lookup_slowpath(sess_id); 1743 if (!sess) { 1744 rc = -ENOENT; 1745 goto out_err; 1746 } 1747 1748 if (conn->dialect != sess->dialect) { 1749 rc = -EINVAL; 1750 goto out_err; 1751 } 1752 1753 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1754 rc = -EINVAL; 1755 goto out_err; 1756 } 1757 1758 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1759 SMB2_CLIENT_GUID_SIZE)) { 1760 rc = -ENOENT; 1761 goto out_err; 1762 } 1763 1764 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1765 rc = -EACCES; 1766 goto out_err; 1767 } 1768 1769 if (sess->state == SMB2_SESSION_EXPIRED) { 1770 rc = -EFAULT; 1771 goto out_err; 1772 } 1773 1774 if (ksmbd_conn_need_reconnect(conn)) { 1775 rc = -EFAULT; 1776 ksmbd_user_session_put(sess); 1777 sess = NULL; 1778 goto out_err; 1779 } 1780 1781 if (is_ksmbd_session_in_connection(conn, sess_id)) { 1782 rc = -EACCES; 1783 goto out_err; 1784 } 1785 1786 if (user_guest(sess->user)) { 1787 rc = -EOPNOTSUPP; 1788 goto out_err; 1789 } 1790 1791 conn->binding = true; 1792 } else if ((conn->dialect < SMB30_PROT_ID || 1793 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1794 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1795 sess = NULL; 1796 rc = -EACCES; 1797 goto out_err; 1798 } else { 1799 sess = ksmbd_session_lookup(conn, 1800 le64_to_cpu(req->hdr.SessionId)); 1801 if (!sess) { 1802 rc = -ENOENT; 1803 goto out_err; 1804 } 1805 1806 if (sess->state == SMB2_SESSION_EXPIRED) { 1807 rc = -EFAULT; 1808 goto out_err; 1809 } 1810 1811 if (ksmbd_conn_need_reconnect(conn)) { 1812 rc = -EFAULT; 1813 ksmbd_user_session_put(sess); 1814 sess = NULL; 1815 goto out_err; 1816 } 1817 1818 conn->binding = false; 1819 } 1820 work->sess = sess; 1821 1822 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1823 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1824 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { 1825 rc = -EINVAL; 1826 goto out_err; 1827 } 1828 1829 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1830 negblob_off); 1831 1832 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1833 if (conn->mechToken) { 1834 negblob = (struct negotiate_message *)conn->mechToken; 1835 negblob_len = conn->mechTokenLen; 1836 } 1837 } 1838 1839 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1840 rc = -EINVAL; 1841 goto out_err; 1842 } 1843 1844 if (server_conf.auth_mechs & conn->auth_mechs) { 1845 rc = generate_preauth_hash(work); 1846 if (rc) 1847 goto out_err; 1848 1849 if (conn->preferred_auth_mech & 1850 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1851 rc = krb5_authenticate(work, req, rsp); 1852 if (rc) { 1853 rc = -EINVAL; 1854 goto out_err; 1855 } 1856 1857 if (!ksmbd_conn_need_reconnect(conn)) { 1858 ksmbd_conn_set_good(conn); 1859 sess->state = SMB2_SESSION_VALID; 1860 } 1861 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1862 if (negblob->MessageType == NtLmNegotiate) { 1863 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1864 if (rc) 1865 goto out_err; 1866 rsp->hdr.Status = 1867 STATUS_MORE_PROCESSING_REQUIRED; 1868 } else if (negblob->MessageType == NtLmAuthenticate) { 1869 rc = ntlm_authenticate(work, req, rsp); 1870 if (rc) 1871 goto out_err; 1872 1873 if (!ksmbd_conn_need_reconnect(conn)) { 1874 ksmbd_conn_set_good(conn); 1875 sess->state = SMB2_SESSION_VALID; 1876 } 1877 if (conn->binding) { 1878 struct preauth_session *preauth_sess; 1879 1880 preauth_sess = 1881 ksmbd_preauth_session_lookup(conn, sess->id); 1882 if (preauth_sess) { 1883 list_del(&preauth_sess->preauth_entry); 1884 kfree(preauth_sess); 1885 } 1886 } 1887 } else { 1888 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1889 le32_to_cpu(negblob->MessageType)); 1890 rc = -EINVAL; 1891 } 1892 } else { 1893 /* TODO: need one more negotiation */ 1894 pr_err("Not support the preferred authentication\n"); 1895 rc = -EINVAL; 1896 } 1897 } else { 1898 pr_err("Not support authentication\n"); 1899 rc = -EINVAL; 1900 } 1901 1902 out_err: 1903 if (rc == -EINVAL) 1904 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1905 else if (rc == -ENOENT) 1906 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1907 else if (rc == -EACCES) 1908 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1909 else if (rc == -EFAULT) 1910 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1911 else if (rc == -ENOMEM) 1912 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1913 else if (rc == -EOPNOTSUPP) 1914 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1915 else if (rc) 1916 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1917 1918 if (conn->use_spnego && conn->mechToken) { 1919 kfree(conn->mechToken); 1920 conn->mechToken = NULL; 1921 } 1922 1923 if (rc < 0) { 1924 /* 1925 * SecurityBufferOffset should be set to zero 1926 * in session setup error response. 1927 */ 1928 rsp->SecurityBufferOffset = 0; 1929 1930 if (sess) { 1931 bool try_delay = false; 1932 1933 /* 1934 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1935 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1936 * failure to make it harder to send enough random connection requests 1937 * to break into a server. 1938 */ 1939 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1940 try_delay = true; 1941 1942 /* 1943 * For binding requests, session belongs to another 1944 * connection. Do not expire it. 1945 */ 1946 if (!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1947 sess->last_active = jiffies; 1948 sess->state = SMB2_SESSION_EXPIRED; 1949 } 1950 ksmbd_user_session_put(sess); 1951 work->sess = NULL; 1952 if (try_delay) { 1953 ksmbd_conn_set_need_reconnect(conn); 1954 ssleep(5); 1955 ksmbd_conn_set_need_setup(conn); 1956 } 1957 } 1958 smb2_set_err_rsp(work); 1959 conn->binding = false; 1960 } else { 1961 unsigned int iov_len; 1962 1963 if (rsp->SecurityBufferLength) 1964 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1965 le16_to_cpu(rsp->SecurityBufferLength); 1966 else 1967 iov_len = sizeof(struct smb2_sess_setup_rsp); 1968 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1969 if (rc) 1970 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1971 } 1972 1973 ksmbd_conn_unlock(conn); 1974 return rc; 1975 } 1976 1977 /** 1978 * smb2_tree_connect() - handler for smb2 tree connect command 1979 * @work: smb work containing smb request buffer 1980 * 1981 * Return: 0 on success, otherwise error 1982 */ 1983 int smb2_tree_connect(struct ksmbd_work *work) 1984 { 1985 struct ksmbd_conn *conn = work->conn; 1986 struct smb2_tree_connect_req *req; 1987 struct smb2_tree_connect_rsp *rsp; 1988 struct ksmbd_session *sess = work->sess; 1989 char *treename = NULL, *name = NULL; 1990 struct ksmbd_tree_conn_status status; 1991 struct ksmbd_share_config *share = NULL; 1992 int rc = -EINVAL; 1993 1994 ksmbd_debug(SMB, "Received smb2 tree connect request\n"); 1995 1996 WORK_BUFFERS(work, req, rsp); 1997 1998 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), 1999 le16_to_cpu(req->PathLength), true, 2000 conn->local_nls); 2001 if (IS_ERR(treename)) { 2002 pr_err("treename is NULL\n"); 2003 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 2004 goto out_err1; 2005 } 2006 2007 name = ksmbd_extract_sharename(conn->um, treename); 2008 if (IS_ERR(name)) { 2009 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 2010 goto out_err1; 2011 } 2012 2013 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 2014 name, treename); 2015 2016 status = ksmbd_tree_conn_connect(work, name); 2017 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 2018 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 2019 else 2020 goto out_err1; 2021 2022 share = status.tree_conn->share_conf; 2023 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2024 ksmbd_debug(SMB, "IPC share path request\n"); 2025 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 2026 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2027 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 2028 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 2029 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2030 FILE_SYNCHRONIZE_LE; 2031 } else { 2032 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 2033 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 2034 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 2035 if (test_tree_conn_flag(status.tree_conn, 2036 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2037 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 2038 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 2039 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 2040 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 2041 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 2042 FILE_SYNCHRONIZE_LE; 2043 } 2044 } 2045 2046 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 2047 if (conn->posix_ext_supported) 2048 status.tree_conn->posix_extensions = true; 2049 2050 down_write(&sess->tree_conns_lock); 2051 status.tree_conn->t_state = TREE_CONNECTED; 2052 up_write(&sess->tree_conns_lock); 2053 rsp->StructureSize = cpu_to_le16(16); 2054 out_err1: 2055 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share && 2056 test_share_config_flag(share, 2057 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 2058 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY; 2059 else 2060 rsp->Capabilities = 0; 2061 rsp->Reserved = 0; 2062 /* default manual caching */ 2063 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2064 2065 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2066 if (rc) 2067 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2068 2069 if (!IS_ERR(treename)) 2070 kfree(treename); 2071 if (!IS_ERR(name)) 2072 kfree(name); 2073 2074 switch (status.ret) { 2075 case KSMBD_TREE_CONN_STATUS_OK: 2076 rsp->hdr.Status = STATUS_SUCCESS; 2077 rc = 0; 2078 break; 2079 case -ESTALE: 2080 case -ENOENT: 2081 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2082 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2083 break; 2084 case -ENOMEM: 2085 case KSMBD_TREE_CONN_STATUS_NOMEM: 2086 rsp->hdr.Status = STATUS_NO_MEMORY; 2087 break; 2088 case KSMBD_TREE_CONN_STATUS_ERROR: 2089 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2090 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2091 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2092 break; 2093 case -EINVAL: 2094 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2095 break; 2096 default: 2097 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2098 } 2099 2100 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2101 smb2_set_err_rsp(work); 2102 2103 return rc; 2104 } 2105 2106 /** 2107 * smb2_create_open_flags() - convert smb open flags to unix open flags 2108 * @file_present: is file already present 2109 * @access: file access flags 2110 * @disposition: file disposition flags 2111 * @may_flags: set with MAY_ flags 2112 * @coptions: file creation options 2113 * @mode: file mode 2114 * 2115 * Return: file open flags 2116 */ 2117 static int smb2_create_open_flags(bool file_present, __le32 access, 2118 __le32 disposition, 2119 int *may_flags, 2120 __le32 coptions, 2121 umode_t mode) 2122 { 2123 int oflags = O_NONBLOCK | O_LARGEFILE; 2124 2125 if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) { 2126 access &= ~FILE_WRITE_DESIRE_ACCESS_LE; 2127 ksmbd_debug(SMB, "Discard write access to a directory\n"); 2128 } 2129 2130 if (access & FILE_READ_DESIRED_ACCESS_LE && 2131 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2132 oflags |= O_RDWR; 2133 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2134 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2135 oflags |= O_WRONLY; 2136 *may_flags = MAY_OPEN | MAY_WRITE; 2137 } else { 2138 oflags |= O_RDONLY; 2139 *may_flags = MAY_OPEN | MAY_READ; 2140 } 2141 2142 if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode)) 2143 oflags |= O_PATH; 2144 2145 if (file_present) { 2146 switch (disposition & FILE_CREATE_MASK_LE) { 2147 case FILE_OPEN_LE: 2148 case FILE_CREATE_LE: 2149 break; 2150 case FILE_SUPERSEDE_LE: 2151 case FILE_OVERWRITE_LE: 2152 case FILE_OVERWRITE_IF_LE: 2153 oflags |= O_TRUNC; 2154 break; 2155 default: 2156 break; 2157 } 2158 } else { 2159 switch (disposition & FILE_CREATE_MASK_LE) { 2160 case FILE_SUPERSEDE_LE: 2161 case FILE_CREATE_LE: 2162 case FILE_OPEN_IF_LE: 2163 case FILE_OVERWRITE_IF_LE: 2164 oflags |= O_CREAT; 2165 break; 2166 case FILE_OPEN_LE: 2167 case FILE_OVERWRITE_LE: 2168 oflags &= ~O_CREAT; 2169 break; 2170 default: 2171 break; 2172 } 2173 } 2174 2175 return oflags; 2176 } 2177 2178 /** 2179 * smb2_tree_disconnect() - handler for smb tree connect request 2180 * @work: smb work containing request buffer 2181 * 2182 * Return: 0 on success, otherwise error 2183 */ 2184 int smb2_tree_disconnect(struct ksmbd_work *work) 2185 { 2186 struct smb2_tree_disconnect_rsp *rsp; 2187 struct smb2_tree_disconnect_req *req; 2188 struct ksmbd_session *sess = work->sess; 2189 struct ksmbd_tree_connect *tcon = work->tcon; 2190 int err; 2191 2192 ksmbd_debug(SMB, "Received smb2 tree disconnect request\n"); 2193 2194 WORK_BUFFERS(work, req, rsp); 2195 2196 if (!tcon) { 2197 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2198 2199 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2200 err = -ENOENT; 2201 goto err_out; 2202 } 2203 2204 ksmbd_close_tree_conn_fds(work); 2205 2206 down_write(&sess->tree_conns_lock); 2207 if (tcon->t_state == TREE_DISCONNECTED) { 2208 up_write(&sess->tree_conns_lock); 2209 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2210 err = -ENOENT; 2211 goto err_out; 2212 } 2213 2214 tcon->t_state = TREE_DISCONNECTED; 2215 up_write(&sess->tree_conns_lock); 2216 2217 err = ksmbd_tree_conn_disconnect(sess, tcon); 2218 if (err) { 2219 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2220 goto err_out; 2221 } 2222 2223 rsp->StructureSize = cpu_to_le16(4); 2224 err = ksmbd_iov_pin_rsp(work, rsp, 2225 sizeof(struct smb2_tree_disconnect_rsp)); 2226 if (err) { 2227 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2228 goto err_out; 2229 } 2230 2231 return 0; 2232 2233 err_out: 2234 smb2_set_err_rsp(work); 2235 return err; 2236 2237 } 2238 2239 /** 2240 * smb2_session_logoff() - handler for session log off request 2241 * @work: smb work containing request buffer 2242 * 2243 * Return: 0 on success, otherwise error 2244 */ 2245 int smb2_session_logoff(struct ksmbd_work *work) 2246 { 2247 struct ksmbd_conn *conn = work->conn; 2248 struct ksmbd_session *sess = work->sess; 2249 struct smb2_logoff_req *req; 2250 struct smb2_logoff_rsp *rsp; 2251 u64 sess_id; 2252 int err; 2253 2254 WORK_BUFFERS(work, req, rsp); 2255 2256 ksmbd_debug(SMB, "Received smb2 session logoff request\n"); 2257 2258 ksmbd_conn_lock(conn); 2259 if (!ksmbd_conn_good(conn)) { 2260 ksmbd_conn_unlock(conn); 2261 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2262 smb2_set_err_rsp(work); 2263 return -ENOENT; 2264 } 2265 sess_id = le64_to_cpu(req->hdr.SessionId); 2266 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2267 ksmbd_conn_unlock(conn); 2268 2269 ksmbd_close_session_fds(work); 2270 ksmbd_conn_wait_idle(conn); 2271 2272 if (ksmbd_tree_conn_session_logoff(sess)) { 2273 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2274 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2275 smb2_set_err_rsp(work); 2276 return -ENOENT; 2277 } 2278 2279 down_write(&conn->session_lock); 2280 sess->state = SMB2_SESSION_EXPIRED; 2281 up_write(&conn->session_lock); 2282 2283 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_SETUP); 2284 2285 rsp->StructureSize = cpu_to_le16(4); 2286 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2287 if (err) { 2288 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2289 smb2_set_err_rsp(work); 2290 return err; 2291 } 2292 return 0; 2293 } 2294 2295 /** 2296 * create_smb2_pipe() - create IPC pipe 2297 * @work: smb work containing request buffer 2298 * 2299 * Return: 0 on success, otherwise error 2300 */ 2301 static noinline int create_smb2_pipe(struct ksmbd_work *work) 2302 { 2303 struct smb2_create_rsp *rsp; 2304 struct smb2_create_req *req; 2305 int id = -1; 2306 int err; 2307 char *name; 2308 2309 WORK_BUFFERS(work, req, rsp); 2310 2311 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2312 1, work->conn->local_nls); 2313 if (IS_ERR(name)) { 2314 rsp->hdr.Status = STATUS_NO_MEMORY; 2315 err = PTR_ERR(name); 2316 goto out; 2317 } 2318 2319 id = ksmbd_session_rpc_open(work->sess, name); 2320 if (id < 0) { 2321 pr_err("Unable to open RPC pipe: %d\n", id); 2322 err = id; 2323 goto out; 2324 } 2325 2326 rsp->hdr.Status = STATUS_SUCCESS; 2327 rsp->StructureSize = cpu_to_le16(89); 2328 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2329 rsp->Flags = 0; 2330 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2331 2332 rsp->CreationTime = cpu_to_le64(0); 2333 rsp->LastAccessTime = cpu_to_le64(0); 2334 rsp->ChangeTime = cpu_to_le64(0); 2335 rsp->AllocationSize = cpu_to_le64(0); 2336 rsp->EndofFile = cpu_to_le64(0); 2337 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2338 rsp->Reserved2 = 0; 2339 rsp->VolatileFileId = id; 2340 rsp->PersistentFileId = 0; 2341 rsp->CreateContextsOffset = 0; 2342 rsp->CreateContextsLength = 0; 2343 2344 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2345 if (err) 2346 goto out; 2347 2348 kfree(name); 2349 return 0; 2350 2351 out: 2352 switch (err) { 2353 case -EINVAL: 2354 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2355 break; 2356 case -ENOSPC: 2357 case -ENOMEM: 2358 rsp->hdr.Status = STATUS_NO_MEMORY; 2359 break; 2360 } 2361 2362 if (id >= 0) 2363 ksmbd_session_rpc_close(work->sess, id); 2364 2365 if (!IS_ERR(name)) 2366 kfree(name); 2367 2368 smb2_set_err_rsp(work); 2369 return err; 2370 } 2371 2372 /** 2373 * smb2_set_ea() - handler for setting extended attributes using set 2374 * info command 2375 * @eabuf: set info command buffer 2376 * @buf_len: set info command buffer length 2377 * @path: dentry path for get ea 2378 * @get_write: get write access to a mount 2379 * 2380 * Return: 0 on success, otherwise error 2381 */ 2382 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2383 const struct path *path, bool get_write) 2384 { 2385 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2386 char *attr_name = NULL, *value; 2387 int rc = 0; 2388 unsigned int next = 0; 2389 2390 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2391 le16_to_cpu(eabuf->EaValueLength)) 2392 return -EINVAL; 2393 2394 attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP); 2395 if (!attr_name) 2396 return -ENOMEM; 2397 2398 do { 2399 if (!eabuf->EaNameLength) 2400 goto next; 2401 2402 ksmbd_debug(SMB, 2403 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2404 eabuf->name, eabuf->EaNameLength, 2405 le16_to_cpu(eabuf->EaValueLength), 2406 le32_to_cpu(eabuf->NextEntryOffset)); 2407 2408 if (eabuf->EaNameLength > 2409 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2410 rc = -EINVAL; 2411 break; 2412 } 2413 2414 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2415 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2416 eabuf->EaNameLength); 2417 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2418 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2419 2420 if (!eabuf->EaValueLength) { 2421 rc = ksmbd_vfs_casexattr_len(idmap, 2422 path->dentry, 2423 attr_name, 2424 XATTR_USER_PREFIX_LEN + 2425 eabuf->EaNameLength); 2426 2427 /* delete the EA only when it exits */ 2428 if (rc > 0) { 2429 rc = ksmbd_vfs_remove_xattr(idmap, 2430 path, 2431 attr_name, 2432 get_write); 2433 2434 if (rc < 0) { 2435 ksmbd_debug(SMB, 2436 "remove xattr failed(%d)\n", 2437 rc); 2438 break; 2439 } 2440 } 2441 2442 /* if the EA doesn't exist, just do nothing. */ 2443 rc = 0; 2444 } else { 2445 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2446 le16_to_cpu(eabuf->EaValueLength), 2447 0, get_write); 2448 if (rc < 0) { 2449 ksmbd_debug(SMB, 2450 "ksmbd_vfs_setxattr is failed(%d)\n", 2451 rc); 2452 break; 2453 } 2454 } 2455 2456 next: 2457 next = le32_to_cpu(eabuf->NextEntryOffset); 2458 if (next == 0 || buf_len < next) 2459 break; 2460 buf_len -= next; 2461 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2462 if (buf_len < sizeof(struct smb2_ea_info)) { 2463 rc = -EINVAL; 2464 break; 2465 } 2466 2467 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + 2468 le16_to_cpu(eabuf->EaValueLength)) { 2469 rc = -EINVAL; 2470 break; 2471 } 2472 } while (next != 0); 2473 2474 kfree(attr_name); 2475 return rc; 2476 } 2477 2478 static noinline int smb2_set_stream_name_xattr(const struct path *path, 2479 struct ksmbd_file *fp, 2480 char *stream_name, int s_type) 2481 { 2482 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2483 size_t xattr_stream_size; 2484 char *xattr_stream_name; 2485 int rc; 2486 2487 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2488 &xattr_stream_name, 2489 &xattr_stream_size, 2490 s_type); 2491 if (rc) 2492 return rc; 2493 2494 fp->stream.name = xattr_stream_name; 2495 fp->stream.size = xattr_stream_size; 2496 2497 /* Check if there is stream prefix in xattr space */ 2498 rc = ksmbd_vfs_casexattr_len(idmap, 2499 path->dentry, 2500 xattr_stream_name, 2501 xattr_stream_size); 2502 if (rc >= 0) 2503 return 0; 2504 2505 if (fp->cdoption == FILE_OPEN_LE) { 2506 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2507 return -EBADF; 2508 } 2509 2510 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2511 if (rc < 0) 2512 pr_err("Failed to store XATTR stream name :%d\n", rc); 2513 return 0; 2514 } 2515 2516 static int smb2_remove_smb_xattrs(const struct path *path) 2517 { 2518 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2519 char *name, *xattr_list = NULL; 2520 ssize_t xattr_list_len; 2521 int err = 0; 2522 2523 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2524 if (xattr_list_len < 0) { 2525 goto out; 2526 } else if (!xattr_list_len) { 2527 ksmbd_debug(SMB, "empty xattr in the file\n"); 2528 goto out; 2529 } 2530 2531 for (name = xattr_list; name - xattr_list < xattr_list_len; 2532 name += strlen(name) + 1) { 2533 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2534 2535 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2536 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2537 STREAM_PREFIX_LEN)) { 2538 err = ksmbd_vfs_remove_xattr(idmap, path, 2539 name, true); 2540 if (err) 2541 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2542 name); 2543 } 2544 } 2545 out: 2546 kvfree(xattr_list); 2547 return err; 2548 } 2549 2550 static int smb2_create_truncate(const struct path *path) 2551 { 2552 int rc = vfs_truncate(path, 0); 2553 2554 if (rc) { 2555 pr_err("vfs_truncate failed, rc %d\n", rc); 2556 return rc; 2557 } 2558 2559 rc = smb2_remove_smb_xattrs(path); 2560 if (rc == -EOPNOTSUPP) 2561 rc = 0; 2562 if (rc) 2563 ksmbd_debug(SMB, 2564 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2565 rc); 2566 return rc; 2567 } 2568 2569 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2570 struct ksmbd_file *fp) 2571 { 2572 struct xattr_dos_attrib da = {0}; 2573 int rc; 2574 2575 if (!test_share_config_flag(tcon->share_conf, 2576 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2577 return; 2578 2579 da.version = 4; 2580 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2581 da.itime = da.create_time = fp->create_time; 2582 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2583 XATTR_DOSINFO_ITIME; 2584 2585 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); 2586 if (rc) 2587 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2588 } 2589 2590 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2591 const struct path *path, struct ksmbd_file *fp) 2592 { 2593 struct xattr_dos_attrib da; 2594 int rc; 2595 2596 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2597 2598 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2599 if (!test_share_config_flag(tcon->share_conf, 2600 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2601 return; 2602 2603 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2604 path->dentry, &da); 2605 if (rc > 0) { 2606 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2607 fp->create_time = da.create_time; 2608 fp->itime = da.itime; 2609 } 2610 } 2611 2612 static int smb2_creat(struct ksmbd_work *work, 2613 struct path *path, char *name, int open_flags, 2614 umode_t posix_mode, bool is_dir) 2615 { 2616 struct ksmbd_tree_connect *tcon = work->tcon; 2617 struct ksmbd_share_config *share = tcon->share_conf; 2618 umode_t mode; 2619 int rc; 2620 2621 if (!(open_flags & O_CREAT)) 2622 return -EBADF; 2623 2624 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2625 if (is_dir == true) { 2626 ksmbd_debug(SMB, "creating directory\n"); 2627 2628 mode = share_config_directory_mode(share, posix_mode); 2629 rc = ksmbd_vfs_mkdir(work, name, mode); 2630 if (rc) 2631 return rc; 2632 } else { 2633 ksmbd_debug(SMB, "creating regular file\n"); 2634 2635 mode = share_config_create_mode(share, posix_mode); 2636 rc = ksmbd_vfs_create(work, name, mode); 2637 if (rc) 2638 return rc; 2639 } 2640 2641 rc = ksmbd_vfs_kern_path(work, name, 0, path, 0); 2642 if (rc) { 2643 pr_err("cannot get linux path (%s), err = %d\n", 2644 name, rc); 2645 return rc; 2646 } 2647 return 0; 2648 } 2649 2650 static int smb2_create_sd_buffer(struct ksmbd_work *work, 2651 struct smb2_create_req *req, 2652 const struct path *path) 2653 { 2654 struct create_context *context; 2655 struct create_sd_buf_req *sd_buf; 2656 2657 if (!req->CreateContextsOffset) 2658 return -ENOENT; 2659 2660 /* Parse SD BUFFER create contexts */ 2661 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2662 if (!context) 2663 return -ENOENT; 2664 else if (IS_ERR(context)) 2665 return PTR_ERR(context); 2666 2667 ksmbd_debug(SMB, 2668 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2669 sd_buf = (struct create_sd_buf_req *)context; 2670 if (le16_to_cpu(context->DataOffset) + 2671 le32_to_cpu(context->DataLength) < 2672 sizeof(struct create_sd_buf_req)) 2673 return -EINVAL; 2674 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2675 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2676 } 2677 2678 static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2679 struct mnt_idmap *idmap, 2680 struct inode *inode) 2681 { 2682 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2683 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2684 2685 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2686 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2687 fattr->cf_mode = inode->i_mode; 2688 fattr->cf_acls = NULL; 2689 fattr->cf_dacls = NULL; 2690 2691 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2692 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2693 if (S_ISDIR(inode->i_mode)) 2694 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2695 } 2696 } 2697 2698 enum { 2699 DURABLE_RECONN_V2 = 1, 2700 DURABLE_RECONN, 2701 DURABLE_REQ_V2, 2702 DURABLE_REQ, 2703 }; 2704 2705 struct durable_info { 2706 struct ksmbd_file *fp; 2707 unsigned short int type; 2708 bool persistent; 2709 bool reconnected; 2710 unsigned int timeout; 2711 char *CreateGuid; 2712 }; 2713 2714 static int parse_durable_handle_context(struct ksmbd_work *work, 2715 struct smb2_create_req *req, 2716 struct lease_ctx_info *lc, 2717 struct durable_info *dh_info) 2718 { 2719 struct ksmbd_conn *conn = work->conn; 2720 struct create_context *context; 2721 int dh_idx, err = 0; 2722 u64 persistent_id = 0; 2723 int req_op_level; 2724 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; 2725 2726 req_op_level = req->RequestedOplockLevel; 2727 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); 2728 dh_idx++) { 2729 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); 2730 if (IS_ERR(context)) { 2731 err = PTR_ERR(context); 2732 goto out; 2733 } 2734 if (!context) 2735 continue; 2736 2737 switch (dh_idx) { 2738 case DURABLE_RECONN_V2: 2739 { 2740 struct create_durable_handle_reconnect_v2 *recon_v2; 2741 2742 if (dh_info->type == DURABLE_RECONN || 2743 dh_info->type == DURABLE_REQ_V2) { 2744 err = -EINVAL; 2745 goto out; 2746 } 2747 2748 if (le16_to_cpu(context->DataOffset) + 2749 le32_to_cpu(context->DataLength) < 2750 sizeof(struct create_durable_handle_reconnect_v2)) { 2751 err = -EINVAL; 2752 goto out; 2753 } 2754 2755 recon_v2 = (struct create_durable_handle_reconnect_v2 *)context; 2756 persistent_id = recon_v2->dcontext.Fid.PersistentFileId; 2757 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2758 if (!dh_info->fp) { 2759 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2760 err = -EBADF; 2761 goto out; 2762 } 2763 2764 if (memcmp(dh_info->fp->create_guid, recon_v2->dcontext.CreateGuid, 2765 SMB2_CREATE_GUID_SIZE)) { 2766 err = -EBADF; 2767 ksmbd_put_durable_fd(dh_info->fp); 2768 goto out; 2769 } 2770 2771 dh_info->type = dh_idx; 2772 dh_info->reconnected = true; 2773 ksmbd_debug(SMB, 2774 "reconnect v2 Persistent-id from reconnect = %llu\n", 2775 persistent_id); 2776 break; 2777 } 2778 case DURABLE_RECONN: 2779 { 2780 create_durable_reconn_t *recon; 2781 2782 if (dh_info->type == DURABLE_RECONN_V2 || 2783 dh_info->type == DURABLE_REQ_V2) { 2784 err = -EINVAL; 2785 goto out; 2786 } 2787 2788 if (le16_to_cpu(context->DataOffset) + 2789 le32_to_cpu(context->DataLength) < 2790 sizeof(create_durable_reconn_t)) { 2791 err = -EINVAL; 2792 goto out; 2793 } 2794 2795 recon = (create_durable_reconn_t *)context; 2796 persistent_id = recon->Data.Fid.PersistentFileId; 2797 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); 2798 if (!dh_info->fp) { 2799 ksmbd_debug(SMB, "Failed to get durable handle state\n"); 2800 err = -EBADF; 2801 goto out; 2802 } 2803 2804 dh_info->type = dh_idx; 2805 dh_info->reconnected = true; 2806 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", 2807 persistent_id); 2808 break; 2809 } 2810 case DURABLE_REQ_V2: 2811 { 2812 struct create_durable_req_v2 *durable_v2_blob; 2813 2814 if (dh_info->type == DURABLE_RECONN || 2815 dh_info->type == DURABLE_RECONN_V2) { 2816 err = -EINVAL; 2817 goto out; 2818 } 2819 2820 if (le16_to_cpu(context->DataOffset) + 2821 le32_to_cpu(context->DataLength) < 2822 sizeof(struct create_durable_req_v2)) { 2823 err = -EINVAL; 2824 goto out; 2825 } 2826 2827 durable_v2_blob = 2828 (struct create_durable_req_v2 *)context; 2829 ksmbd_debug(SMB, "Request for durable v2 open\n"); 2830 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->dcontext.CreateGuid); 2831 if (dh_info->fp) { 2832 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, 2833 SMB2_CLIENT_GUID_SIZE)) { 2834 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { 2835 err = -ENOEXEC; 2836 ksmbd_put_durable_fd(dh_info->fp); 2837 goto out; 2838 } 2839 2840 if (dh_info->fp->conn) { 2841 ksmbd_put_durable_fd(dh_info->fp); 2842 err = -EBADF; 2843 goto out; 2844 } 2845 dh_info->reconnected = true; 2846 goto out; 2847 } 2848 } 2849 2850 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2851 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2852 dh_info->CreateGuid = 2853 durable_v2_blob->dcontext.CreateGuid; 2854 dh_info->persistent = 2855 le32_to_cpu(durable_v2_blob->dcontext.Flags); 2856 dh_info->timeout = 2857 le32_to_cpu(durable_v2_blob->dcontext.Timeout); 2858 dh_info->type = dh_idx; 2859 } 2860 break; 2861 } 2862 case DURABLE_REQ: 2863 if (dh_info->type == DURABLE_RECONN) 2864 goto out; 2865 if (dh_info->type == DURABLE_RECONN_V2 || 2866 dh_info->type == DURABLE_REQ_V2) { 2867 err = -EINVAL; 2868 goto out; 2869 } 2870 2871 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2872 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2873 ksmbd_debug(SMB, "Request for durable open\n"); 2874 dh_info->type = dh_idx; 2875 } 2876 } 2877 } 2878 2879 out: 2880 return err; 2881 } 2882 2883 /** 2884 * smb2_open() - handler for smb file open request 2885 * @work: smb work containing request buffer 2886 * 2887 * Return: 0 on success, otherwise error 2888 */ 2889 int smb2_open(struct ksmbd_work *work) 2890 { 2891 struct ksmbd_conn *conn = work->conn; 2892 struct ksmbd_session *sess = work->sess; 2893 struct ksmbd_tree_connect *tcon = work->tcon; 2894 struct smb2_create_req *req; 2895 struct smb2_create_rsp *rsp; 2896 struct path path; 2897 struct ksmbd_share_config *share = tcon->share_conf; 2898 struct ksmbd_file *fp = NULL; 2899 struct file *filp = NULL; 2900 struct mnt_idmap *idmap = NULL; 2901 struct kstat stat; 2902 struct create_context *context; 2903 struct lease_ctx_info *lc = NULL; 2904 struct create_ea_buf_req *ea_buf = NULL; 2905 struct oplock_info *opinfo; 2906 struct durable_info dh_info = {0}; 2907 __le32 *next_ptr = NULL; 2908 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2909 int rc = 0; 2910 int contxt_cnt = 0, query_disk_id = 0; 2911 bool maximal_access_ctxt = false, posix_ctxt = false; 2912 int s_type = 0; 2913 int next_off = 0; 2914 char *name = NULL; 2915 char *stream_name = NULL; 2916 bool file_present = false, created = false, already_permitted = false; 2917 int share_ret, need_truncate = 0; 2918 u64 time; 2919 umode_t posix_mode = 0; 2920 __le32 daccess, maximal_access = 0; 2921 int iov_len = 0; 2922 2923 ksmbd_debug(SMB, "Received smb2 create request\n"); 2924 2925 WORK_BUFFERS(work, req, rsp); 2926 2927 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2928 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2929 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2930 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2931 smb2_set_err_rsp(work); 2932 return -EINVAL; 2933 } 2934 2935 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2936 ksmbd_debug(SMB, "IPC pipe create request\n"); 2937 return create_smb2_pipe(work); 2938 } 2939 2940 if (req->CreateContextsOffset && tcon->posix_extensions) { 2941 context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); 2942 if (IS_ERR(context)) { 2943 rc = PTR_ERR(context); 2944 goto err_out2; 2945 } else if (context) { 2946 struct create_posix *posix = (struct create_posix *)context; 2947 2948 if (le16_to_cpu(context->DataOffset) + 2949 le32_to_cpu(context->DataLength) < 2950 sizeof(struct create_posix) - 4) { 2951 rc = -EINVAL; 2952 goto err_out2; 2953 } 2954 ksmbd_debug(SMB, "get posix context\n"); 2955 2956 posix_mode = le32_to_cpu(posix->Mode); 2957 posix_ctxt = true; 2958 } 2959 } 2960 2961 if (req->NameLength) { 2962 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), 2963 le16_to_cpu(req->NameLength), 2964 work->conn->local_nls); 2965 if (IS_ERR(name)) { 2966 rc = PTR_ERR(name); 2967 name = NULL; 2968 goto err_out2; 2969 } 2970 2971 ksmbd_debug(SMB, "converted name = %s\n", name); 2972 2973 if (posix_ctxt == false) { 2974 if (strchr(name, ':')) { 2975 if (!test_share_config_flag(work->tcon->share_conf, 2976 KSMBD_SHARE_FLAG_STREAMS)) { 2977 rc = -EBADF; 2978 goto err_out2; 2979 } 2980 rc = parse_stream_name(name, &stream_name, &s_type); 2981 if (rc < 0) 2982 goto err_out2; 2983 } 2984 2985 rc = ksmbd_validate_filename(name); 2986 if (rc < 0) 2987 goto err_out2; 2988 } 2989 2990 if (ksmbd_share_veto_filename(share, name)) { 2991 rc = -ENOENT; 2992 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2993 name); 2994 goto err_out2; 2995 } 2996 } else { 2997 name = kstrdup("", KSMBD_DEFAULT_GFP); 2998 if (!name) { 2999 rc = -ENOMEM; 3000 goto err_out2; 3001 } 3002 } 3003 3004 req_op_level = req->RequestedOplockLevel; 3005 3006 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && 3007 req->CreateContextsOffset) { 3008 lc = parse_lease_state(req); 3009 rc = parse_durable_handle_context(work, req, lc, &dh_info); 3010 if (rc) { 3011 ksmbd_debug(SMB, "error parsing durable handle context\n"); 3012 goto err_out2; 3013 } 3014 3015 if (dh_info.reconnected == true) { 3016 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, 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, ace_num = 0; 3406 3407 ksmbd_acls_fattr(&fattr, idmap, inode); 3408 if (fattr.cf_acls) 3409 ace_num = fattr.cf_acls->a_count; 3410 if (fattr.cf_dacls) 3411 ace_num += fattr.cf_dacls->a_count; 3412 3413 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3414 sizeof(struct smb_sid) * 3 + 3415 sizeof(struct smb_acl) + 3416 sizeof(struct smb_ace) * ace_num * 2, 3417 KSMBD_DEFAULT_GFP); 3418 if (!pntsd) { 3419 posix_acl_release(fattr.cf_acls); 3420 posix_acl_release(fattr.cf_dacls); 3421 goto err_out; 3422 } 3423 3424 rc = build_sec_desc(idmap, 3425 pntsd, NULL, 0, 3426 OWNER_SECINFO | 3427 GROUP_SECINFO | 3428 DACL_SECINFO, 3429 &pntsd_size, &fattr); 3430 posix_acl_release(fattr.cf_acls); 3431 posix_acl_release(fattr.cf_dacls); 3432 if (rc) { 3433 kfree(pntsd); 3434 goto err_out; 3435 } 3436 3437 rc = ksmbd_vfs_set_sd_xattr(conn, 3438 idmap, 3439 &path, 3440 pntsd, 3441 pntsd_size, 3442 false); 3443 kfree(pntsd); 3444 if (rc) 3445 pr_err("failed to store ntacl in xattr : %d\n", 3446 rc); 3447 } 3448 } 3449 } 3450 rc = 0; 3451 } 3452 3453 if (stream_name) { 3454 rc = smb2_set_stream_name_xattr(&path, 3455 fp, 3456 stream_name, 3457 s_type); 3458 if (rc) 3459 goto err_out; 3460 file_info = FILE_CREATED; 3461 } 3462 3463 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3464 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3465 3466 fp->is_posix_ctxt = posix_ctxt; 3467 3468 /* fp should be searchable through ksmbd_inode.m_fp_list 3469 * after daccess, saccess, attrib_only, and stream are 3470 * initialized. 3471 */ 3472 down_write(&fp->f_ci->m_lock); 3473 list_add(&fp->node, &fp->f_ci->m_fp_list); 3474 up_write(&fp->f_ci->m_lock); 3475 3476 /* Check delete pending among previous fp before oplock break */ 3477 if (ksmbd_inode_pending_delete(fp)) { 3478 rc = -EBUSY; 3479 goto err_out; 3480 } 3481 3482 if (file_present || created) 3483 path_put(&path); 3484 3485 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3486 !fp->attrib_only && !stream_name) { 3487 smb_break_all_oplock(work, fp); 3488 need_truncate = 1; 3489 } 3490 3491 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3492 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3493 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3494 !(conn->vals->req_capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3495 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3496 rc = share_ret; 3497 goto err_out1; 3498 } 3499 } else { 3500 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { 3501 if (S_ISDIR(file_inode(filp)->i_mode)) { 3502 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; 3503 lc->is_dir = true; 3504 } 3505 3506 /* 3507 * Compare parent lease using parent key. If there is no 3508 * a lease that has same parent key, Send lease break 3509 * notification. 3510 */ 3511 smb_send_parent_lease_break_noti(fp, lc); 3512 3513 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3514 ksmbd_debug(SMB, 3515 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3516 name, req_op_level, lc->req_state); 3517 rc = find_same_lease_key(sess, fp->f_ci, lc); 3518 if (rc) 3519 goto err_out1; 3520 } else if (open_flags == O_RDONLY && 3521 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3522 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3523 req_op_level = SMB2_OPLOCK_LEVEL_II; 3524 3525 rc = smb_grant_oplock(work, req_op_level, 3526 fp->persistent_id, fp, 3527 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3528 lc, share_ret); 3529 if (rc < 0) 3530 goto err_out1; 3531 } 3532 3533 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3534 ksmbd_fd_set_delete_on_close(fp, file_info); 3535 3536 if (need_truncate) { 3537 rc = smb2_create_truncate(&fp->filp->f_path); 3538 if (rc) 3539 goto err_out1; 3540 } 3541 3542 if (req->CreateContextsOffset) { 3543 struct create_alloc_size_req *az_req; 3544 3545 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3546 SMB2_CREATE_ALLOCATION_SIZE, 4); 3547 if (IS_ERR(az_req)) { 3548 rc = PTR_ERR(az_req); 3549 goto err_out1; 3550 } else if (az_req) { 3551 loff_t alloc_size; 3552 int err; 3553 3554 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3555 le32_to_cpu(az_req->ccontext.DataLength) < 3556 sizeof(struct create_alloc_size_req)) { 3557 rc = -EINVAL; 3558 goto err_out1; 3559 } 3560 alloc_size = le64_to_cpu(az_req->AllocationSize); 3561 ksmbd_debug(SMB, 3562 "request smb2 create allocate size : %llu\n", 3563 alloc_size); 3564 smb_break_all_levII_oplock(work, fp, 1); 3565 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3566 alloc_size); 3567 if (err < 0) 3568 ksmbd_debug(SMB, 3569 "vfs_fallocate is failed : %d\n", 3570 err); 3571 } 3572 3573 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3574 if (IS_ERR(context)) { 3575 rc = PTR_ERR(context); 3576 goto err_out1; 3577 } else if (context) { 3578 ksmbd_debug(SMB, "get query on disk id context\n"); 3579 query_disk_id = 1; 3580 } 3581 3582 if (conn->is_aapl == false) { 3583 context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); 3584 if (IS_ERR(context)) { 3585 rc = PTR_ERR(context); 3586 goto err_out1; 3587 } else if (context) 3588 conn->is_aapl = true; 3589 } 3590 } 3591 3592 rc = ksmbd_vfs_getattr(&path, &stat); 3593 if (rc) 3594 goto err_out1; 3595 3596 if (stat.result_mask & STATX_BTIME) 3597 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3598 else 3599 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3600 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3601 fp->f_ci->m_fattr = 3602 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3603 3604 if (!created) 3605 smb2_update_xattrs(tcon, &path, fp); 3606 else 3607 smb2_new_xattrs(tcon, &path, fp); 3608 3609 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3610 3611 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { 3612 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && 3613 test_share_config_flag(work->tcon->share_conf, 3614 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 3615 fp->is_persistent = true; 3616 else 3617 fp->is_durable = true; 3618 3619 if (dh_info.type == DURABLE_REQ_V2) { 3620 memcpy(fp->create_guid, dh_info.CreateGuid, 3621 SMB2_CREATE_GUID_SIZE); 3622 if (dh_info.timeout) 3623 fp->durable_timeout = 3624 min_t(unsigned int, dh_info.timeout, 3625 DURABLE_HANDLE_MAX_TIMEOUT); 3626 else 3627 fp->durable_timeout = 60; 3628 } 3629 } 3630 3631 reconnected_fp: 3632 rsp->StructureSize = cpu_to_le16(89); 3633 opinfo = opinfo_get(fp); 3634 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3635 rsp->Flags = 0; 3636 rsp->CreateAction = cpu_to_le32(file_info); 3637 rsp->CreationTime = cpu_to_le64(fp->create_time); 3638 time = ksmbd_UnixTimeToNT(stat.atime); 3639 rsp->LastAccessTime = cpu_to_le64(time); 3640 time = ksmbd_UnixTimeToNT(stat.mtime); 3641 rsp->LastWriteTime = cpu_to_le64(time); 3642 time = ksmbd_UnixTimeToNT(stat.ctime); 3643 rsp->ChangeTime = cpu_to_le64(time); 3644 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3645 cpu_to_le64(stat.blocks << 9); 3646 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3647 rsp->FileAttributes = fp->f_ci->m_fattr; 3648 3649 rsp->Reserved2 = 0; 3650 3651 rsp->PersistentFileId = fp->persistent_id; 3652 rsp->VolatileFileId = fp->volatile_id; 3653 3654 rsp->CreateContextsOffset = 0; 3655 rsp->CreateContextsLength = 0; 3656 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3657 3658 /* If lease is request send lease context response */ 3659 if (opinfo && opinfo->is_lease) { 3660 struct create_context *lease_ccontext; 3661 3662 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3663 name, opinfo->o_lease->state); 3664 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3665 3666 lease_ccontext = (struct create_context *)rsp->Buffer; 3667 contxt_cnt++; 3668 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3669 le32_add_cpu(&rsp->CreateContextsLength, 3670 conn->vals->create_lease_size); 3671 iov_len += conn->vals->create_lease_size; 3672 next_ptr = &lease_ccontext->Next; 3673 next_off = conn->vals->create_lease_size; 3674 } 3675 opinfo_put(opinfo); 3676 3677 if (maximal_access_ctxt) { 3678 struct create_context *mxac_ccontext; 3679 3680 if (maximal_access == 0) 3681 ksmbd_vfs_query_maximal_access(idmap, 3682 path.dentry, 3683 &maximal_access); 3684 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3685 le32_to_cpu(rsp->CreateContextsLength)); 3686 contxt_cnt++; 3687 create_mxac_rsp_buf(rsp->Buffer + 3688 le32_to_cpu(rsp->CreateContextsLength), 3689 le32_to_cpu(maximal_access)); 3690 le32_add_cpu(&rsp->CreateContextsLength, 3691 conn->vals->create_mxac_size); 3692 iov_len += conn->vals->create_mxac_size; 3693 if (next_ptr) 3694 *next_ptr = cpu_to_le32(next_off); 3695 next_ptr = &mxac_ccontext->Next; 3696 next_off = conn->vals->create_mxac_size; 3697 } 3698 3699 if (query_disk_id) { 3700 struct create_context *disk_id_ccontext; 3701 3702 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3703 le32_to_cpu(rsp->CreateContextsLength)); 3704 contxt_cnt++; 3705 create_disk_id_rsp_buf(rsp->Buffer + 3706 le32_to_cpu(rsp->CreateContextsLength), 3707 stat.ino, tcon->id); 3708 le32_add_cpu(&rsp->CreateContextsLength, 3709 conn->vals->create_disk_id_size); 3710 iov_len += conn->vals->create_disk_id_size; 3711 if (next_ptr) 3712 *next_ptr = cpu_to_le32(next_off); 3713 next_ptr = &disk_id_ccontext->Next; 3714 next_off = conn->vals->create_disk_id_size; 3715 } 3716 3717 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { 3718 struct create_context *durable_ccontext; 3719 3720 durable_ccontext = (struct create_context *)(rsp->Buffer + 3721 le32_to_cpu(rsp->CreateContextsLength)); 3722 contxt_cnt++; 3723 if (dh_info.type == DURABLE_REQ) { 3724 create_durable_rsp_buf(rsp->Buffer + 3725 le32_to_cpu(rsp->CreateContextsLength)); 3726 le32_add_cpu(&rsp->CreateContextsLength, 3727 conn->vals->create_durable_size); 3728 iov_len += conn->vals->create_durable_size; 3729 } else { 3730 create_durable_v2_rsp_buf(rsp->Buffer + 3731 le32_to_cpu(rsp->CreateContextsLength), 3732 fp); 3733 le32_add_cpu(&rsp->CreateContextsLength, 3734 conn->vals->create_durable_v2_size); 3735 iov_len += conn->vals->create_durable_v2_size; 3736 } 3737 3738 if (next_ptr) 3739 *next_ptr = cpu_to_le32(next_off); 3740 next_ptr = &durable_ccontext->Next; 3741 next_off = conn->vals->create_durable_size; 3742 } 3743 3744 if (posix_ctxt) { 3745 contxt_cnt++; 3746 create_posix_rsp_buf(rsp->Buffer + 3747 le32_to_cpu(rsp->CreateContextsLength), 3748 fp); 3749 le32_add_cpu(&rsp->CreateContextsLength, 3750 conn->vals->create_posix_size); 3751 iov_len += conn->vals->create_posix_size; 3752 if (next_ptr) 3753 *next_ptr = cpu_to_le32(next_off); 3754 } 3755 3756 if (contxt_cnt > 0) { 3757 rsp->CreateContextsOffset = 3758 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3759 } 3760 3761 err_out: 3762 if (rc && (file_present || created)) 3763 path_put(&path); 3764 3765 err_out1: 3766 ksmbd_revert_fsids(work); 3767 3768 err_out2: 3769 if (!rc) { 3770 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3771 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3772 } 3773 if (rc) { 3774 if (rc == -EINVAL) 3775 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3776 else if (rc == -EOPNOTSUPP) 3777 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3778 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3779 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3780 else if (rc == -ENOENT) 3781 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3782 else if (rc == -EPERM) 3783 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3784 else if (rc == -EBUSY) 3785 rsp->hdr.Status = STATUS_DELETE_PENDING; 3786 else if (rc == -EBADF) 3787 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3788 else if (rc == -ENOEXEC) 3789 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3790 else if (rc == -ENXIO) 3791 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3792 else if (rc == -EEXIST) 3793 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3794 else if (rc == -EMFILE) 3795 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3796 if (!rsp->hdr.Status) 3797 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3798 3799 if (fp) 3800 ksmbd_fd_put(work, fp); 3801 smb2_set_err_rsp(work); 3802 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3803 } 3804 3805 kfree(name); 3806 kfree(lc); 3807 3808 return rc; 3809 } 3810 3811 static int readdir_info_level_struct_sz(int info_level) 3812 { 3813 switch (info_level) { 3814 case FILE_FULL_DIRECTORY_INFORMATION: 3815 return sizeof(FILE_FULL_DIRECTORY_INFO); 3816 case FILE_BOTH_DIRECTORY_INFORMATION: 3817 return sizeof(FILE_BOTH_DIRECTORY_INFO); 3818 case FILE_DIRECTORY_INFORMATION: 3819 return sizeof(FILE_DIRECTORY_INFO); 3820 case FILE_NAMES_INFORMATION: 3821 return sizeof(struct file_names_info); 3822 case FILEID_FULL_DIRECTORY_INFORMATION: 3823 return sizeof(FILE_ID_FULL_DIR_INFO); 3824 case FILEID_BOTH_DIRECTORY_INFORMATION: 3825 return sizeof(struct file_id_both_directory_info); 3826 case SMB_FIND_FILE_POSIX_INFO: 3827 return sizeof(struct smb2_posix_info); 3828 default: 3829 return -EOPNOTSUPP; 3830 } 3831 } 3832 3833 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3834 { 3835 switch (info_level) { 3836 case FILE_FULL_DIRECTORY_INFORMATION: 3837 { 3838 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3839 3840 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->rptr; 3841 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3842 d_info->name = ffdinfo->FileName; 3843 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3844 return 0; 3845 } 3846 case FILE_BOTH_DIRECTORY_INFORMATION: 3847 { 3848 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3849 3850 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->rptr; 3851 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3852 d_info->name = fbdinfo->FileName; 3853 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3854 return 0; 3855 } 3856 case FILE_DIRECTORY_INFORMATION: 3857 { 3858 FILE_DIRECTORY_INFO *fdinfo; 3859 3860 fdinfo = (FILE_DIRECTORY_INFO *)d_info->rptr; 3861 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3862 d_info->name = fdinfo->FileName; 3863 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3864 return 0; 3865 } 3866 case FILE_NAMES_INFORMATION: 3867 { 3868 struct file_names_info *fninfo; 3869 3870 fninfo = (struct file_names_info *)d_info->rptr; 3871 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3872 d_info->name = fninfo->FileName; 3873 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3874 return 0; 3875 } 3876 case FILEID_FULL_DIRECTORY_INFORMATION: 3877 { 3878 FILE_ID_FULL_DIR_INFO *dinfo; 3879 3880 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->rptr; 3881 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3882 d_info->name = dinfo->FileName; 3883 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3884 return 0; 3885 } 3886 case FILEID_BOTH_DIRECTORY_INFORMATION: 3887 { 3888 struct file_id_both_directory_info *fibdinfo; 3889 3890 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3891 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3892 d_info->name = fibdinfo->FileName; 3893 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3894 return 0; 3895 } 3896 case SMB_FIND_FILE_POSIX_INFO: 3897 { 3898 struct smb2_posix_info *posix_info; 3899 3900 posix_info = (struct smb2_posix_info *)d_info->rptr; 3901 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3902 d_info->name = posix_info->name; 3903 d_info->name_len = le32_to_cpu(posix_info->name_len); 3904 return 0; 3905 } 3906 default: 3907 return -EINVAL; 3908 } 3909 } 3910 3911 /** 3912 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3913 * buffer 3914 * @conn: connection instance 3915 * @info_level: smb information level 3916 * @d_info: structure included variables for query dir 3917 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3918 * 3919 * if directory has many entries, find first can't read it fully. 3920 * find next might be called multiple times to read remaining dir entries 3921 * 3922 * Return: 0 on success, otherwise error 3923 */ 3924 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3925 struct ksmbd_dir_info *d_info, 3926 struct ksmbd_kstat *ksmbd_kstat) 3927 { 3928 int next_entry_offset = 0; 3929 char *conv_name; 3930 int conv_len; 3931 void *kstat; 3932 int struct_sz, rc = 0; 3933 3934 conv_name = ksmbd_convert_dir_info_name(d_info, 3935 conn->local_nls, 3936 &conv_len); 3937 if (!conv_name) 3938 return -ENOMEM; 3939 3940 /* Somehow the name has only terminating NULL bytes */ 3941 if (conv_len < 0) { 3942 rc = -EINVAL; 3943 goto free_conv_name; 3944 } 3945 3946 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3947 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3948 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3949 3950 if (next_entry_offset > d_info->out_buf_len) { 3951 d_info->out_buf_len = 0; 3952 rc = -ENOSPC; 3953 goto free_conv_name; 3954 } 3955 3956 kstat = d_info->wptr; 3957 if (info_level != FILE_NAMES_INFORMATION) 3958 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3959 3960 switch (info_level) { 3961 case FILE_FULL_DIRECTORY_INFORMATION: 3962 { 3963 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3964 3965 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)kstat; 3966 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3967 ffdinfo->EaSize = 3968 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3969 if (ffdinfo->EaSize) 3970 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3971 if (d_info->hide_dot_file && d_info->name[0] == '.') 3972 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3973 memcpy(ffdinfo->FileName, conv_name, conv_len); 3974 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3975 break; 3976 } 3977 case FILE_BOTH_DIRECTORY_INFORMATION: 3978 { 3979 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3980 3981 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)kstat; 3982 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3983 fbdinfo->EaSize = 3984 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3985 if (fbdinfo->EaSize) 3986 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3987 fbdinfo->ShortNameLength = 0; 3988 fbdinfo->Reserved = 0; 3989 if (d_info->hide_dot_file && d_info->name[0] == '.') 3990 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3991 memcpy(fbdinfo->FileName, conv_name, conv_len); 3992 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3993 break; 3994 } 3995 case FILE_DIRECTORY_INFORMATION: 3996 { 3997 FILE_DIRECTORY_INFO *fdinfo; 3998 3999 fdinfo = (FILE_DIRECTORY_INFO *)kstat; 4000 fdinfo->FileNameLength = cpu_to_le32(conv_len); 4001 if (d_info->hide_dot_file && d_info->name[0] == '.') 4002 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4003 memcpy(fdinfo->FileName, conv_name, conv_len); 4004 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4005 break; 4006 } 4007 case FILE_NAMES_INFORMATION: 4008 { 4009 struct file_names_info *fninfo; 4010 4011 fninfo = (struct file_names_info *)kstat; 4012 fninfo->FileNameLength = cpu_to_le32(conv_len); 4013 memcpy(fninfo->FileName, conv_name, conv_len); 4014 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4015 break; 4016 } 4017 case FILEID_FULL_DIRECTORY_INFORMATION: 4018 { 4019 FILE_ID_FULL_DIR_INFO *dinfo; 4020 4021 dinfo = (FILE_ID_FULL_DIR_INFO *)kstat; 4022 dinfo->FileNameLength = cpu_to_le32(conv_len); 4023 dinfo->EaSize = 4024 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4025 if (dinfo->EaSize) 4026 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4027 dinfo->Reserved = 0; 4028 if (conn->is_aapl) 4029 dinfo->UniqueId = 0; 4030 else 4031 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4032 if (d_info->hide_dot_file && d_info->name[0] == '.') 4033 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4034 memcpy(dinfo->FileName, conv_name, conv_len); 4035 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4036 break; 4037 } 4038 case FILEID_BOTH_DIRECTORY_INFORMATION: 4039 { 4040 struct file_id_both_directory_info *fibdinfo; 4041 4042 fibdinfo = (struct file_id_both_directory_info *)kstat; 4043 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 4044 fibdinfo->EaSize = 4045 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4046 if (fibdinfo->EaSize) 4047 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4048 if (conn->is_aapl) 4049 fibdinfo->UniqueId = 0; 4050 else 4051 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4052 fibdinfo->ShortNameLength = 0; 4053 fibdinfo->Reserved = 0; 4054 fibdinfo->Reserved2 = cpu_to_le16(0); 4055 if (d_info->hide_dot_file && d_info->name[0] == '.') 4056 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4057 memcpy(fibdinfo->FileName, conv_name, conv_len); 4058 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4059 break; 4060 } 4061 case SMB_FIND_FILE_POSIX_INFO: 4062 { 4063 struct smb2_posix_info *posix_info; 4064 u64 time; 4065 4066 posix_info = (struct smb2_posix_info *)kstat; 4067 posix_info->Ignored = 0; 4068 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 4069 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 4070 posix_info->ChangeTime = cpu_to_le64(time); 4071 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 4072 posix_info->LastAccessTime = cpu_to_le64(time); 4073 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 4074 posix_info->LastWriteTime = cpu_to_le64(time); 4075 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 4076 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 4077 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 4078 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 4079 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 4080 switch (ksmbd_kstat->kstat->mode & S_IFMT) { 4081 case S_IFDIR: 4082 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 4083 break; 4084 case S_IFLNK: 4085 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 4086 break; 4087 case S_IFCHR: 4088 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 4089 break; 4090 case S_IFBLK: 4091 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 4092 break; 4093 case S_IFIFO: 4094 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 4095 break; 4096 case S_IFSOCK: 4097 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 4098 } 4099 4100 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 4101 posix_info->DosAttributes = 4102 S_ISDIR(ksmbd_kstat->kstat->mode) ? 4103 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 4104 if (d_info->hide_dot_file && d_info->name[0] == '.') 4105 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4106 /* 4107 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4108 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4109 * sub_auth(4 * 1(num_subauth)) + RID(4). 4110 */ 4111 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 4112 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 4113 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 4114 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 4115 memcpy(posix_info->name, conv_name, conv_len); 4116 posix_info->name_len = cpu_to_le32(conv_len); 4117 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 4118 break; 4119 } 4120 4121 } /* switch (info_level) */ 4122 4123 d_info->last_entry_offset = d_info->data_count; 4124 d_info->data_count += next_entry_offset; 4125 d_info->out_buf_len -= next_entry_offset; 4126 d_info->wptr += next_entry_offset; 4127 4128 ksmbd_debug(SMB, 4129 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 4130 info_level, d_info->out_buf_len, 4131 next_entry_offset, d_info->data_count); 4132 4133 free_conv_name: 4134 kfree(conv_name); 4135 return rc; 4136 } 4137 4138 struct smb2_query_dir_private { 4139 struct ksmbd_work *work; 4140 char *search_pattern; 4141 struct ksmbd_file *dir_fp; 4142 4143 struct ksmbd_dir_info *d_info; 4144 int info_level; 4145 }; 4146 4147 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 4148 { 4149 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 4150 struct kstat kstat; 4151 struct ksmbd_kstat ksmbd_kstat; 4152 int rc; 4153 int i; 4154 4155 for (i = 0; i < priv->d_info->num_entry; i++) { 4156 struct dentry *dent; 4157 4158 if (dentry_name(priv->d_info, priv->info_level)) 4159 return -EINVAL; 4160 4161 dent = lookup_one_unlocked(idmap, 4162 &QSTR_LEN(priv->d_info->name, 4163 priv->d_info->name_len), 4164 priv->dir_fp->filp->f_path.dentry); 4165 4166 if (IS_ERR(dent)) { 4167 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 4168 priv->d_info->name, 4169 PTR_ERR(dent)); 4170 continue; 4171 } 4172 if (unlikely(d_is_negative(dent))) { 4173 dput(dent); 4174 ksmbd_debug(SMB, "Negative dentry `%s'\n", 4175 priv->d_info->name); 4176 continue; 4177 } 4178 4179 ksmbd_kstat.kstat = &kstat; 4180 if (priv->info_level != FILE_NAMES_INFORMATION) { 4181 rc = ksmbd_vfs_fill_dentry_attrs(priv->work, 4182 idmap, 4183 dent, 4184 &ksmbd_kstat); 4185 if (rc) { 4186 dput(dent); 4187 continue; 4188 } 4189 } 4190 4191 rc = smb2_populate_readdir_entry(priv->work->conn, 4192 priv->info_level, 4193 priv->d_info, 4194 &ksmbd_kstat); 4195 dput(dent); 4196 if (rc) 4197 return rc; 4198 } 4199 return 0; 4200 } 4201 4202 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 4203 int info_level) 4204 { 4205 int struct_sz; 4206 int conv_len; 4207 int next_entry_offset; 4208 4209 struct_sz = readdir_info_level_struct_sz(info_level); 4210 if (struct_sz == -EOPNOTSUPP) 4211 return -EOPNOTSUPP; 4212 4213 conv_len = (d_info->name_len + 1) * 2; 4214 next_entry_offset = ALIGN(struct_sz + conv_len, 4215 KSMBD_DIR_INFO_ALIGNMENT); 4216 4217 if (next_entry_offset > d_info->out_buf_len) { 4218 d_info->out_buf_len = 0; 4219 return -ENOSPC; 4220 } 4221 4222 switch (info_level) { 4223 case FILE_FULL_DIRECTORY_INFORMATION: 4224 { 4225 FILE_FULL_DIRECTORY_INFO *ffdinfo; 4226 4227 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->wptr; 4228 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 4229 ffdinfo->FileName[d_info->name_len] = 0x00; 4230 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4231 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4232 break; 4233 } 4234 case FILE_BOTH_DIRECTORY_INFORMATION: 4235 { 4236 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 4237 4238 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->wptr; 4239 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 4240 fbdinfo->FileName[d_info->name_len] = 0x00; 4241 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4242 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4243 break; 4244 } 4245 case FILE_DIRECTORY_INFORMATION: 4246 { 4247 FILE_DIRECTORY_INFO *fdinfo; 4248 4249 fdinfo = (FILE_DIRECTORY_INFO *)d_info->wptr; 4250 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 4251 fdinfo->FileName[d_info->name_len] = 0x00; 4252 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4253 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4254 break; 4255 } 4256 case FILE_NAMES_INFORMATION: 4257 { 4258 struct file_names_info *fninfo; 4259 4260 fninfo = (struct file_names_info *)d_info->wptr; 4261 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 4262 fninfo->FileName[d_info->name_len] = 0x00; 4263 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 4264 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4265 break; 4266 } 4267 case FILEID_FULL_DIRECTORY_INFORMATION: 4268 { 4269 FILE_ID_FULL_DIR_INFO *dinfo; 4270 4271 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->wptr; 4272 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 4273 dinfo->FileName[d_info->name_len] = 0x00; 4274 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4275 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4276 break; 4277 } 4278 case FILEID_BOTH_DIRECTORY_INFORMATION: 4279 { 4280 struct file_id_both_directory_info *fibdinfo; 4281 4282 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 4283 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 4284 fibdinfo->FileName[d_info->name_len] = 0x00; 4285 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4286 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4287 break; 4288 } 4289 case SMB_FIND_FILE_POSIX_INFO: 4290 { 4291 struct smb2_posix_info *posix_info; 4292 4293 posix_info = (struct smb2_posix_info *)d_info->wptr; 4294 memcpy(posix_info->name, d_info->name, d_info->name_len); 4295 posix_info->name[d_info->name_len] = 0x00; 4296 posix_info->name_len = cpu_to_le32(d_info->name_len); 4297 posix_info->NextEntryOffset = 4298 cpu_to_le32(next_entry_offset); 4299 break; 4300 } 4301 } /* switch (info_level) */ 4302 4303 d_info->num_entry++; 4304 d_info->out_buf_len -= next_entry_offset; 4305 d_info->wptr += next_entry_offset; 4306 return 0; 4307 } 4308 4309 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 4310 loff_t offset, u64 ino, unsigned int d_type) 4311 { 4312 struct ksmbd_readdir_data *buf; 4313 struct smb2_query_dir_private *priv; 4314 struct ksmbd_dir_info *d_info; 4315 int rc; 4316 4317 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 4318 priv = buf->private; 4319 d_info = priv->d_info; 4320 4321 /* dot and dotdot entries are already reserved */ 4322 if (!strcmp(".", name) || !strcmp("..", name)) 4323 return true; 4324 d_info->num_scan++; 4325 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 4326 return true; 4327 if (!match_pattern(name, namlen, priv->search_pattern)) 4328 return true; 4329 4330 d_info->name = name; 4331 d_info->name_len = namlen; 4332 rc = reserve_populate_dentry(d_info, priv->info_level); 4333 if (rc) 4334 return false; 4335 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 4336 d_info->out_buf_len = 0; 4337 return true; 4338 } 4339 4340 static int verify_info_level(int info_level) 4341 { 4342 switch (info_level) { 4343 case FILE_FULL_DIRECTORY_INFORMATION: 4344 case FILE_BOTH_DIRECTORY_INFORMATION: 4345 case FILE_DIRECTORY_INFORMATION: 4346 case FILE_NAMES_INFORMATION: 4347 case FILEID_FULL_DIRECTORY_INFORMATION: 4348 case FILEID_BOTH_DIRECTORY_INFORMATION: 4349 case SMB_FIND_FILE_POSIX_INFO: 4350 break; 4351 default: 4352 return -EOPNOTSUPP; 4353 } 4354 4355 return 0; 4356 } 4357 4358 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4359 { 4360 int free_len; 4361 4362 free_len = (int)(work->response_sz - 4363 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4364 return free_len; 4365 } 4366 4367 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4368 unsigned short hdr2_len, 4369 unsigned int out_buf_len) 4370 { 4371 int free_len; 4372 4373 if (out_buf_len > work->conn->vals->max_trans_size) 4374 return -EINVAL; 4375 4376 free_len = smb2_resp_buf_len(work, hdr2_len); 4377 if (free_len < 0) 4378 return -EINVAL; 4379 4380 return min_t(int, out_buf_len, free_len); 4381 } 4382 4383 int smb2_query_dir(struct ksmbd_work *work) 4384 { 4385 struct ksmbd_conn *conn = work->conn; 4386 struct smb2_query_directory_req *req; 4387 struct smb2_query_directory_rsp *rsp; 4388 struct ksmbd_share_config *share = work->tcon->share_conf; 4389 struct ksmbd_file *dir_fp = NULL; 4390 struct ksmbd_dir_info d_info; 4391 int rc = 0; 4392 char *srch_ptr = NULL; 4393 unsigned char srch_flag; 4394 int buffer_sz; 4395 struct smb2_query_dir_private query_dir_private = {NULL, }; 4396 4397 ksmbd_debug(SMB, "Received smb2 query directory request\n"); 4398 4399 WORK_BUFFERS(work, req, rsp); 4400 4401 if (ksmbd_override_fsids(work)) { 4402 rsp->hdr.Status = STATUS_NO_MEMORY; 4403 smb2_set_err_rsp(work); 4404 return -ENOMEM; 4405 } 4406 4407 rc = verify_info_level(req->FileInformationClass); 4408 if (rc) { 4409 rc = -EFAULT; 4410 goto err_out2; 4411 } 4412 4413 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4414 if (!dir_fp) { 4415 rc = -EBADF; 4416 goto err_out2; 4417 } 4418 4419 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4420 inode_permission(file_mnt_idmap(dir_fp->filp), 4421 file_inode(dir_fp->filp), 4422 MAY_READ | MAY_EXEC)) { 4423 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4424 rc = -EACCES; 4425 goto err_out2; 4426 } 4427 4428 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4429 pr_err("can't do query dir for a file\n"); 4430 rc = -EINVAL; 4431 goto err_out2; 4432 } 4433 4434 srch_flag = req->Flags; 4435 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), 4436 le16_to_cpu(req->FileNameLength), 1, 4437 conn->local_nls); 4438 if (IS_ERR(srch_ptr)) { 4439 ksmbd_debug(SMB, "Search Pattern not found\n"); 4440 rc = -EINVAL; 4441 goto err_out2; 4442 } else { 4443 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4444 } 4445 4446 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4447 ksmbd_debug(SMB, "Restart directory scan\n"); 4448 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4449 } 4450 4451 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4452 d_info.wptr = (char *)rsp->Buffer; 4453 d_info.rptr = (char *)rsp->Buffer; 4454 d_info.out_buf_len = 4455 smb2_calc_max_out_buf_len(work, 4456 offsetof(struct smb2_query_directory_rsp, Buffer), 4457 le32_to_cpu(req->OutputBufferLength)); 4458 if (d_info.out_buf_len < 0) { 4459 rc = -EINVAL; 4460 goto err_out; 4461 } 4462 d_info.flags = srch_flag; 4463 4464 /* 4465 * reserve dot and dotdot entries in head of buffer 4466 * in first response 4467 */ 4468 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4469 dir_fp, &d_info, srch_ptr, 4470 smb2_populate_readdir_entry); 4471 if (rc == -ENOSPC) 4472 rc = 0; 4473 else if (rc) 4474 goto err_out; 4475 4476 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4477 d_info.hide_dot_file = true; 4478 4479 buffer_sz = d_info.out_buf_len; 4480 d_info.rptr = d_info.wptr; 4481 query_dir_private.work = work; 4482 query_dir_private.search_pattern = srch_ptr; 4483 query_dir_private.dir_fp = dir_fp; 4484 query_dir_private.d_info = &d_info; 4485 query_dir_private.info_level = req->FileInformationClass; 4486 dir_fp->readdir_data.private = &query_dir_private; 4487 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4488 again: 4489 d_info.num_scan = 0; 4490 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4491 /* 4492 * num_entry can be 0 if the directory iteration stops before reaching 4493 * the end of the directory and no file is matched with the search 4494 * pattern. 4495 */ 4496 if (rc >= 0 && !d_info.num_entry && d_info.num_scan && 4497 d_info.out_buf_len > 0) 4498 goto again; 4499 /* 4500 * req->OutputBufferLength is too small to contain even one entry. 4501 * In this case, it immediately returns OutputBufferLength 0 to client. 4502 */ 4503 if (!d_info.out_buf_len && !d_info.num_entry) 4504 goto no_buf_len; 4505 if (rc > 0 || rc == -ENOSPC) 4506 rc = 0; 4507 else if (rc) 4508 goto err_out; 4509 4510 d_info.wptr = d_info.rptr; 4511 d_info.out_buf_len = buffer_sz; 4512 rc = process_query_dir_entries(&query_dir_private); 4513 if (rc) 4514 goto err_out; 4515 4516 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4517 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4518 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4519 } else { 4520 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4521 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4522 } 4523 rsp->StructureSize = cpu_to_le16(9); 4524 rsp->OutputBufferOffset = cpu_to_le16(0); 4525 rsp->OutputBufferLength = cpu_to_le32(0); 4526 rsp->Buffer[0] = 0; 4527 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4528 offsetof(struct smb2_query_directory_rsp, Buffer) 4529 + 1); 4530 if (rc) 4531 goto err_out; 4532 } else { 4533 no_buf_len: 4534 ((FILE_DIRECTORY_INFO *) 4535 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4536 ->NextEntryOffset = 0; 4537 if (d_info.data_count >= d_info.last_entry_off_align) 4538 d_info.data_count -= d_info.last_entry_off_align; 4539 4540 rsp->StructureSize = cpu_to_le16(9); 4541 rsp->OutputBufferOffset = cpu_to_le16(72); 4542 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4543 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4544 offsetof(struct smb2_query_directory_rsp, Buffer) + 4545 d_info.data_count); 4546 if (rc) 4547 goto err_out; 4548 } 4549 4550 kfree(srch_ptr); 4551 ksmbd_fd_put(work, dir_fp); 4552 ksmbd_revert_fsids(work); 4553 return 0; 4554 4555 err_out: 4556 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4557 kfree(srch_ptr); 4558 4559 err_out2: 4560 if (rc == -EINVAL) 4561 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4562 else if (rc == -EACCES) 4563 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4564 else if (rc == -ENOENT) 4565 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4566 else if (rc == -EBADF) 4567 rsp->hdr.Status = STATUS_FILE_CLOSED; 4568 else if (rc == -ENOMEM) 4569 rsp->hdr.Status = STATUS_NO_MEMORY; 4570 else if (rc == -EFAULT) 4571 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4572 else if (rc == -EIO) 4573 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4574 if (!rsp->hdr.Status) 4575 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4576 4577 smb2_set_err_rsp(work); 4578 ksmbd_fd_put(work, dir_fp); 4579 ksmbd_revert_fsids(work); 4580 return rc; 4581 } 4582 4583 /** 4584 * buffer_check_err() - helper function to check buffer errors 4585 * @reqOutputBufferLength: max buffer length expected in command response 4586 * @rsp: query info response buffer contains output buffer length 4587 * @rsp_org: base response buffer pointer in case of chained response 4588 * 4589 * Return: 0 on success, otherwise error 4590 */ 4591 static int buffer_check_err(int reqOutputBufferLength, 4592 struct smb2_query_info_rsp *rsp, 4593 void *rsp_org) 4594 { 4595 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4596 pr_err("Invalid Buffer Size Requested\n"); 4597 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4598 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4599 return -EINVAL; 4600 } 4601 return 0; 4602 } 4603 4604 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4605 void *rsp_org) 4606 { 4607 struct smb2_file_standard_info *sinfo; 4608 4609 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4610 4611 sinfo->AllocationSize = cpu_to_le64(4096); 4612 sinfo->EndOfFile = cpu_to_le64(0); 4613 sinfo->NumberOfLinks = cpu_to_le32(1); 4614 sinfo->DeletePending = 1; 4615 sinfo->Directory = 0; 4616 rsp->OutputBufferLength = 4617 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4618 } 4619 4620 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4621 void *rsp_org) 4622 { 4623 struct smb2_file_internal_info *file_info; 4624 4625 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4626 4627 /* any unique number */ 4628 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4629 rsp->OutputBufferLength = 4630 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4631 } 4632 4633 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4634 struct smb2_query_info_req *req, 4635 struct smb2_query_info_rsp *rsp, 4636 void *rsp_org) 4637 { 4638 u64 id; 4639 int rc; 4640 4641 /* 4642 * Windows can sometime send query file info request on 4643 * pipe without opening it, checking error condition here 4644 */ 4645 id = req->VolatileFileId; 4646 4647 lockdep_assert_not_held(&sess->rpc_lock); 4648 4649 down_read(&sess->rpc_lock); 4650 if (!ksmbd_session_rpc_method(sess, id)) { 4651 up_read(&sess->rpc_lock); 4652 return -ENOENT; 4653 } 4654 up_read(&sess->rpc_lock); 4655 4656 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4657 req->FileInfoClass, req->VolatileFileId); 4658 4659 switch (req->FileInfoClass) { 4660 case FILE_STANDARD_INFORMATION: 4661 get_standard_info_pipe(rsp, rsp_org); 4662 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4663 rsp, rsp_org); 4664 break; 4665 case FILE_INTERNAL_INFORMATION: 4666 get_internal_info_pipe(rsp, id, rsp_org); 4667 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4668 rsp, rsp_org); 4669 break; 4670 default: 4671 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4672 req->FileInfoClass); 4673 rc = -EOPNOTSUPP; 4674 } 4675 return rc; 4676 } 4677 4678 /** 4679 * smb2_get_ea() - handler for smb2 get extended attribute command 4680 * @work: smb work containing query info command buffer 4681 * @fp: ksmbd_file pointer 4682 * @req: get extended attribute request 4683 * @rsp: response buffer pointer 4684 * @rsp_org: base response buffer pointer in case of chained response 4685 * 4686 * Return: 0 on success, otherwise error 4687 */ 4688 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4689 struct smb2_query_info_req *req, 4690 struct smb2_query_info_rsp *rsp, void *rsp_org) 4691 { 4692 struct smb2_ea_info *eainfo, *prev_eainfo; 4693 char *name, *ptr, *xattr_list = NULL, *buf; 4694 int rc, name_len, value_len, xattr_list_len, idx; 4695 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4696 struct smb2_ea_info_req *ea_req = NULL; 4697 const struct path *path; 4698 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4699 4700 if (!(fp->daccess & FILE_READ_EA_LE)) { 4701 pr_err("Not permitted to read ext attr : 0x%x\n", 4702 fp->daccess); 4703 return -EACCES; 4704 } 4705 4706 path = &fp->filp->f_path; 4707 /* single EA entry is requested with given user.* name */ 4708 if (req->InputBufferLength) { 4709 if (le32_to_cpu(req->InputBufferLength) <= 4710 sizeof(struct smb2_ea_info_req)) 4711 return -EINVAL; 4712 4713 ea_req = (struct smb2_ea_info_req *)((char *)req + 4714 le16_to_cpu(req->InputBufferOffset)); 4715 } else { 4716 /* need to send all EAs, if no specific EA is requested*/ 4717 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4718 ksmbd_debug(SMB, 4719 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4720 le32_to_cpu(req->Flags)); 4721 } 4722 4723 buf_free_len = 4724 smb2_calc_max_out_buf_len(work, 4725 offsetof(struct smb2_query_info_rsp, Buffer), 4726 le32_to_cpu(req->OutputBufferLength)); 4727 if (buf_free_len < 0) 4728 return -EINVAL; 4729 4730 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4731 if (rc < 0) { 4732 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4733 goto out; 4734 } else if (!rc) { /* there is no EA in the file */ 4735 ksmbd_debug(SMB, "no ea data in the file\n"); 4736 goto done; 4737 } 4738 xattr_list_len = rc; 4739 4740 ptr = (char *)rsp->Buffer; 4741 eainfo = (struct smb2_ea_info *)ptr; 4742 prev_eainfo = eainfo; 4743 idx = 0; 4744 4745 while (idx < xattr_list_len) { 4746 name = xattr_list + idx; 4747 name_len = strlen(name); 4748 4749 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4750 idx += name_len + 1; 4751 4752 /* 4753 * CIFS does not support EA other than user.* namespace, 4754 * still keep the framework generic, to list other attrs 4755 * in future. 4756 */ 4757 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4758 continue; 4759 4760 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4761 STREAM_PREFIX_LEN)) 4762 continue; 4763 4764 if (req->InputBufferLength && 4765 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4766 ea_req->EaNameLength)) 4767 continue; 4768 4769 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4770 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4771 continue; 4772 4773 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4774 name_len -= XATTR_USER_PREFIX_LEN; 4775 4776 ptr = eainfo->name + name_len + 1; 4777 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4778 name_len + 1); 4779 /* bailout if xattr can't fit in buf_free_len */ 4780 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4781 name, &buf); 4782 if (value_len <= 0) { 4783 rc = -ENOENT; 4784 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4785 goto out; 4786 } 4787 4788 buf_free_len -= value_len; 4789 if (buf_free_len < 0) { 4790 kfree(buf); 4791 break; 4792 } 4793 4794 memcpy(ptr, buf, value_len); 4795 kfree(buf); 4796 4797 ptr += value_len; 4798 eainfo->Flags = 0; 4799 eainfo->EaNameLength = name_len; 4800 4801 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4802 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4803 name_len); 4804 else 4805 memcpy(eainfo->name, name, name_len); 4806 4807 eainfo->name[name_len] = '\0'; 4808 eainfo->EaValueLength = cpu_to_le16(value_len); 4809 next_offset = offsetof(struct smb2_ea_info, name) + 4810 name_len + 1 + value_len; 4811 4812 /* align next xattr entry at 4 byte bundary */ 4813 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4814 if (alignment_bytes) { 4815 memset(ptr, '\0', alignment_bytes); 4816 ptr += alignment_bytes; 4817 next_offset += alignment_bytes; 4818 buf_free_len -= alignment_bytes; 4819 } 4820 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4821 prev_eainfo = eainfo; 4822 eainfo = (struct smb2_ea_info *)ptr; 4823 rsp_data_cnt += next_offset; 4824 4825 if (req->InputBufferLength) { 4826 ksmbd_debug(SMB, "single entry requested\n"); 4827 break; 4828 } 4829 } 4830 4831 /* no more ea entries */ 4832 prev_eainfo->NextEntryOffset = 0; 4833 done: 4834 rc = 0; 4835 if (rsp_data_cnt == 0) 4836 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4837 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4838 out: 4839 kvfree(xattr_list); 4840 return rc; 4841 } 4842 4843 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4844 struct ksmbd_file *fp, void *rsp_org) 4845 { 4846 struct smb2_file_access_info *file_info; 4847 4848 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4849 file_info->AccessFlags = fp->daccess; 4850 rsp->OutputBufferLength = 4851 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4852 } 4853 4854 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4855 struct ksmbd_file *fp, void *rsp_org) 4856 { 4857 struct smb2_file_basic_info *basic_info; 4858 struct kstat stat; 4859 u64 time; 4860 int ret; 4861 4862 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4863 pr_err("no right to read the attributes : 0x%x\n", 4864 fp->daccess); 4865 return -EACCES; 4866 } 4867 4868 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4869 AT_STATX_SYNC_AS_STAT); 4870 if (ret) 4871 return ret; 4872 4873 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4874 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4875 time = ksmbd_UnixTimeToNT(stat.atime); 4876 basic_info->LastAccessTime = cpu_to_le64(time); 4877 time = ksmbd_UnixTimeToNT(stat.mtime); 4878 basic_info->LastWriteTime = cpu_to_le64(time); 4879 time = ksmbd_UnixTimeToNT(stat.ctime); 4880 basic_info->ChangeTime = cpu_to_le64(time); 4881 basic_info->Attributes = fp->f_ci->m_fattr; 4882 basic_info->Pad1 = 0; 4883 rsp->OutputBufferLength = 4884 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4885 return 0; 4886 } 4887 4888 static int get_file_standard_info(struct smb2_query_info_rsp *rsp, 4889 struct ksmbd_file *fp, void *rsp_org) 4890 { 4891 struct smb2_file_standard_info *sinfo; 4892 unsigned int delete_pending; 4893 struct kstat stat; 4894 int ret; 4895 4896 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4897 AT_STATX_SYNC_AS_STAT); 4898 if (ret) 4899 return ret; 4900 4901 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4902 delete_pending = ksmbd_inode_pending_delete(fp); 4903 4904 if (ksmbd_stream_fd(fp) == false) { 4905 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); 4906 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4907 } else { 4908 sinfo->AllocationSize = cpu_to_le64(fp->stream.size); 4909 sinfo->EndOfFile = cpu_to_le64(fp->stream.size); 4910 } 4911 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4912 sinfo->DeletePending = delete_pending; 4913 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4914 rsp->OutputBufferLength = 4915 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4916 4917 return 0; 4918 } 4919 4920 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4921 void *rsp_org) 4922 { 4923 struct smb2_file_alignment_info *file_info; 4924 4925 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4926 file_info->AlignmentRequirement = 0; 4927 rsp->OutputBufferLength = 4928 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4929 } 4930 4931 static int get_file_all_info(struct ksmbd_work *work, 4932 struct smb2_query_info_rsp *rsp, 4933 struct ksmbd_file *fp, 4934 void *rsp_org) 4935 { 4936 struct ksmbd_conn *conn = work->conn; 4937 struct smb2_file_all_info *file_info; 4938 unsigned int delete_pending; 4939 struct kstat stat; 4940 int conv_len; 4941 char *filename; 4942 u64 time; 4943 int ret, buf_free_len, filename_len; 4944 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4945 4946 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4947 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4948 fp->daccess); 4949 return -EACCES; 4950 } 4951 4952 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4953 if (IS_ERR(filename)) 4954 return PTR_ERR(filename); 4955 4956 filename_len = strlen(filename); 4957 buf_free_len = smb2_calc_max_out_buf_len(work, 4958 offsetof(struct smb2_query_info_rsp, Buffer) + 4959 offsetof(struct smb2_file_all_info, FileName), 4960 le32_to_cpu(req->OutputBufferLength)); 4961 if (buf_free_len < (filename_len + 1) * 2) { 4962 kfree(filename); 4963 return -EINVAL; 4964 } 4965 4966 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4967 AT_STATX_SYNC_AS_STAT); 4968 if (ret) { 4969 kfree(filename); 4970 return ret; 4971 } 4972 4973 ksmbd_debug(SMB, "filename = %s\n", filename); 4974 delete_pending = ksmbd_inode_pending_delete(fp); 4975 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4976 4977 file_info->CreationTime = cpu_to_le64(fp->create_time); 4978 time = ksmbd_UnixTimeToNT(stat.atime); 4979 file_info->LastAccessTime = cpu_to_le64(time); 4980 time = ksmbd_UnixTimeToNT(stat.mtime); 4981 file_info->LastWriteTime = cpu_to_le64(time); 4982 time = ksmbd_UnixTimeToNT(stat.ctime); 4983 file_info->ChangeTime = cpu_to_le64(time); 4984 file_info->Attributes = fp->f_ci->m_fattr; 4985 file_info->Pad1 = 0; 4986 if (ksmbd_stream_fd(fp) == false) { 4987 file_info->AllocationSize = 4988 cpu_to_le64(stat.blocks << 9); 4989 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4990 } else { 4991 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 4992 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 4993 } 4994 file_info->NumberOfLinks = 4995 cpu_to_le32(get_nlink(&stat) - delete_pending); 4996 file_info->DeletePending = delete_pending; 4997 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4998 file_info->Pad2 = 0; 4999 file_info->IndexNumber = cpu_to_le64(stat.ino); 5000 file_info->EASize = 0; 5001 file_info->AccessFlags = fp->daccess; 5002 if (ksmbd_stream_fd(fp) == false) 5003 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5004 else 5005 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5006 file_info->Mode = fp->coption; 5007 file_info->AlignmentRequirement = 0; 5008 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 5009 min(filename_len, PATH_MAX), 5010 conn->local_nls, 0); 5011 conv_len *= 2; 5012 file_info->FileNameLength = cpu_to_le32(conv_len); 5013 rsp->OutputBufferLength = 5014 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 5015 kfree(filename); 5016 return 0; 5017 } 5018 5019 static void get_file_alternate_info(struct ksmbd_work *work, 5020 struct smb2_query_info_rsp *rsp, 5021 struct ksmbd_file *fp, 5022 void *rsp_org) 5023 { 5024 struct ksmbd_conn *conn = work->conn; 5025 struct smb2_file_alt_name_info *file_info; 5026 struct dentry *dentry = fp->filp->f_path.dentry; 5027 int conv_len; 5028 5029 spin_lock(&dentry->d_lock); 5030 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 5031 conv_len = ksmbd_extract_shortname(conn, 5032 dentry->d_name.name, 5033 file_info->FileName); 5034 spin_unlock(&dentry->d_lock); 5035 file_info->FileNameLength = cpu_to_le32(conv_len); 5036 rsp->OutputBufferLength = 5037 cpu_to_le32(struct_size(file_info, FileName, conv_len)); 5038 } 5039 5040 static int get_file_stream_info(struct ksmbd_work *work, 5041 struct smb2_query_info_rsp *rsp, 5042 struct ksmbd_file *fp, 5043 void *rsp_org) 5044 { 5045 struct ksmbd_conn *conn = work->conn; 5046 struct smb2_file_stream_info *file_info; 5047 char *stream_name, *xattr_list = NULL, *stream_buf; 5048 struct kstat stat; 5049 const struct path *path = &fp->filp->f_path; 5050 ssize_t xattr_list_len; 5051 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 5052 int buf_free_len; 5053 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 5054 int ret; 5055 5056 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5057 AT_STATX_SYNC_AS_STAT); 5058 if (ret) 5059 return ret; 5060 5061 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 5062 5063 buf_free_len = 5064 smb2_calc_max_out_buf_len(work, 5065 offsetof(struct smb2_query_info_rsp, Buffer), 5066 le32_to_cpu(req->OutputBufferLength)); 5067 if (buf_free_len < 0) 5068 goto out; 5069 5070 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 5071 if (xattr_list_len < 0) { 5072 goto out; 5073 } else if (!xattr_list_len) { 5074 ksmbd_debug(SMB, "empty xattr in the file\n"); 5075 goto out; 5076 } 5077 5078 while (idx < xattr_list_len) { 5079 stream_name = xattr_list + idx; 5080 streamlen = strlen(stream_name); 5081 idx += streamlen + 1; 5082 5083 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 5084 5085 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 5086 STREAM_PREFIX, STREAM_PREFIX_LEN)) 5087 continue; 5088 5089 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 5090 STREAM_PREFIX_LEN); 5091 streamlen = stream_name_len; 5092 5093 /* plus : size */ 5094 streamlen += 1; 5095 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP); 5096 if (!stream_buf) 5097 break; 5098 5099 streamlen = snprintf(stream_buf, streamlen + 1, 5100 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 5101 5102 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 5103 if (next > buf_free_len) { 5104 kfree(stream_buf); 5105 break; 5106 } 5107 5108 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 5109 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5110 stream_buf, streamlen, 5111 conn->local_nls, 0); 5112 streamlen *= 2; 5113 kfree(stream_buf); 5114 file_info->StreamNameLength = cpu_to_le32(streamlen); 5115 file_info->StreamSize = cpu_to_le64(stream_name_len); 5116 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 5117 5118 nbytes += next; 5119 buf_free_len -= next; 5120 file_info->NextEntryOffset = cpu_to_le32(next); 5121 } 5122 5123 out: 5124 if (!S_ISDIR(stat.mode) && 5125 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 5126 file_info = (struct smb2_file_stream_info *) 5127 &rsp->Buffer[nbytes]; 5128 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5129 "::$DATA", 7, conn->local_nls, 0); 5130 streamlen *= 2; 5131 file_info->StreamNameLength = cpu_to_le32(streamlen); 5132 file_info->StreamSize = cpu_to_le64(stat.size); 5133 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 5134 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 5135 } 5136 5137 /* last entry offset should be 0 */ 5138 file_info->NextEntryOffset = 0; 5139 kvfree(xattr_list); 5140 5141 rsp->OutputBufferLength = cpu_to_le32(nbytes); 5142 5143 return 0; 5144 } 5145 5146 static int get_file_internal_info(struct smb2_query_info_rsp *rsp, 5147 struct ksmbd_file *fp, void *rsp_org) 5148 { 5149 struct smb2_file_internal_info *file_info; 5150 struct kstat stat; 5151 int ret; 5152 5153 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5154 AT_STATX_SYNC_AS_STAT); 5155 if (ret) 5156 return ret; 5157 5158 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 5159 file_info->IndexNumber = cpu_to_le64(stat.ino); 5160 rsp->OutputBufferLength = 5161 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 5162 5163 return 0; 5164 } 5165 5166 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 5167 struct ksmbd_file *fp, void *rsp_org) 5168 { 5169 struct smb2_file_network_open_info *file_info; 5170 struct kstat stat; 5171 u64 time; 5172 int ret; 5173 5174 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5175 pr_err("no right to read the attributes : 0x%x\n", 5176 fp->daccess); 5177 return -EACCES; 5178 } 5179 5180 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5181 AT_STATX_SYNC_AS_STAT); 5182 if (ret) 5183 return ret; 5184 5185 file_info = (struct smb2_file_network_open_info *)rsp->Buffer; 5186 5187 file_info->CreationTime = cpu_to_le64(fp->create_time); 5188 time = ksmbd_UnixTimeToNT(stat.atime); 5189 file_info->LastAccessTime = cpu_to_le64(time); 5190 time = ksmbd_UnixTimeToNT(stat.mtime); 5191 file_info->LastWriteTime = cpu_to_le64(time); 5192 time = ksmbd_UnixTimeToNT(stat.ctime); 5193 file_info->ChangeTime = cpu_to_le64(time); 5194 file_info->Attributes = fp->f_ci->m_fattr; 5195 if (ksmbd_stream_fd(fp) == false) { 5196 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5197 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5198 } else { 5199 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5200 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5201 } 5202 file_info->Reserved = cpu_to_le32(0); 5203 rsp->OutputBufferLength = 5204 cpu_to_le32(sizeof(struct smb2_file_network_open_info)); 5205 return 0; 5206 } 5207 5208 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 5209 { 5210 struct smb2_file_ea_info *file_info; 5211 5212 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 5213 file_info->EASize = 0; 5214 rsp->OutputBufferLength = 5215 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 5216 } 5217 5218 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 5219 struct ksmbd_file *fp, void *rsp_org) 5220 { 5221 struct smb2_file_pos_info *file_info; 5222 5223 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 5224 if (ksmbd_stream_fd(fp) == false) 5225 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5226 else 5227 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5228 5229 rsp->OutputBufferLength = 5230 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 5231 } 5232 5233 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 5234 struct ksmbd_file *fp, void *rsp_org) 5235 { 5236 struct smb2_file_mode_info *file_info; 5237 5238 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 5239 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 5240 rsp->OutputBufferLength = 5241 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 5242 } 5243 5244 static int get_file_compression_info(struct smb2_query_info_rsp *rsp, 5245 struct ksmbd_file *fp, void *rsp_org) 5246 { 5247 struct smb2_file_comp_info *file_info; 5248 struct kstat stat; 5249 int ret; 5250 5251 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5252 AT_STATX_SYNC_AS_STAT); 5253 if (ret) 5254 return ret; 5255 5256 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 5257 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 5258 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 5259 file_info->CompressionUnitShift = 0; 5260 file_info->ChunkShift = 0; 5261 file_info->ClusterShift = 0; 5262 memset(&file_info->Reserved[0], 0, 3); 5263 5264 rsp->OutputBufferLength = 5265 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 5266 5267 return 0; 5268 } 5269 5270 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 5271 struct ksmbd_file *fp, void *rsp_org) 5272 { 5273 struct smb2_file_attr_tag_info *file_info; 5274 5275 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5276 pr_err("no right to read the attributes : 0x%x\n", 5277 fp->daccess); 5278 return -EACCES; 5279 } 5280 5281 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 5282 file_info->FileAttributes = fp->f_ci->m_fattr; 5283 file_info->ReparseTag = 0; 5284 rsp->OutputBufferLength = 5285 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 5286 return 0; 5287 } 5288 5289 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 5290 struct ksmbd_file *fp, void *rsp_org) 5291 { 5292 struct smb311_posix_qinfo *file_info; 5293 struct inode *inode = file_inode(fp->filp); 5294 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 5295 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 5296 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 5297 struct kstat stat; 5298 u64 time; 5299 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 5300 int ret; 5301 5302 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5303 AT_STATX_SYNC_AS_STAT); 5304 if (ret) 5305 return ret; 5306 5307 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 5308 file_info->CreationTime = cpu_to_le64(fp->create_time); 5309 time = ksmbd_UnixTimeToNT(stat.atime); 5310 file_info->LastAccessTime = cpu_to_le64(time); 5311 time = ksmbd_UnixTimeToNT(stat.mtime); 5312 file_info->LastWriteTime = cpu_to_le64(time); 5313 time = ksmbd_UnixTimeToNT(stat.ctime); 5314 file_info->ChangeTime = cpu_to_le64(time); 5315 file_info->DosAttributes = fp->f_ci->m_fattr; 5316 file_info->Inode = cpu_to_le64(stat.ino); 5317 if (ksmbd_stream_fd(fp) == false) { 5318 file_info->EndOfFile = cpu_to_le64(stat.size); 5319 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5320 } else { 5321 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5322 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5323 } 5324 file_info->HardLinks = cpu_to_le32(stat.nlink); 5325 file_info->Mode = cpu_to_le32(stat.mode & 0777); 5326 switch (stat.mode & S_IFMT) { 5327 case S_IFDIR: 5328 file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 5329 break; 5330 case S_IFLNK: 5331 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 5332 break; 5333 case S_IFCHR: 5334 file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 5335 break; 5336 case S_IFBLK: 5337 file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 5338 break; 5339 case S_IFIFO: 5340 file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 5341 break; 5342 case S_IFSOCK: 5343 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 5344 } 5345 5346 file_info->DeviceId = cpu_to_le32(stat.rdev); 5347 5348 /* 5349 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 5350 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 5351 * sub_auth(4 * 1(num_subauth)) + RID(4). 5352 */ 5353 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 5354 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 5355 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 5356 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 5357 5358 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 5359 5360 return 0; 5361 } 5362 5363 static int smb2_get_info_file(struct ksmbd_work *work, 5364 struct smb2_query_info_req *req, 5365 struct smb2_query_info_rsp *rsp) 5366 { 5367 struct ksmbd_file *fp; 5368 int fileinfoclass = 0; 5369 int rc = 0; 5370 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5371 5372 if (test_share_config_flag(work->tcon->share_conf, 5373 KSMBD_SHARE_FLAG_PIPE)) { 5374 /* smb2 info file called for pipe */ 5375 return smb2_get_info_file_pipe(work->sess, req, rsp, 5376 work->response_buf); 5377 } 5378 5379 if (work->next_smb2_rcv_hdr_off) { 5380 if (!has_file_id(req->VolatileFileId)) { 5381 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5382 work->compound_fid); 5383 id = work->compound_fid; 5384 pid = work->compound_pfid; 5385 } 5386 } 5387 5388 if (!has_file_id(id)) { 5389 id = req->VolatileFileId; 5390 pid = req->PersistentFileId; 5391 } 5392 5393 fp = ksmbd_lookup_fd_slow(work, id, pid); 5394 if (!fp) 5395 return -ENOENT; 5396 5397 fileinfoclass = req->FileInfoClass; 5398 5399 switch (fileinfoclass) { 5400 case FILE_ACCESS_INFORMATION: 5401 get_file_access_info(rsp, fp, work->response_buf); 5402 break; 5403 5404 case FILE_BASIC_INFORMATION: 5405 rc = get_file_basic_info(rsp, fp, work->response_buf); 5406 break; 5407 5408 case FILE_STANDARD_INFORMATION: 5409 rc = get_file_standard_info(rsp, fp, work->response_buf); 5410 break; 5411 5412 case FILE_ALIGNMENT_INFORMATION: 5413 get_file_alignment_info(rsp, work->response_buf); 5414 break; 5415 5416 case FILE_ALL_INFORMATION: 5417 rc = get_file_all_info(work, rsp, fp, work->response_buf); 5418 break; 5419 5420 case FILE_ALTERNATE_NAME_INFORMATION: 5421 get_file_alternate_info(work, rsp, fp, work->response_buf); 5422 break; 5423 5424 case FILE_STREAM_INFORMATION: 5425 rc = get_file_stream_info(work, rsp, fp, work->response_buf); 5426 break; 5427 5428 case FILE_INTERNAL_INFORMATION: 5429 rc = get_file_internal_info(rsp, fp, work->response_buf); 5430 break; 5431 5432 case FILE_NETWORK_OPEN_INFORMATION: 5433 rc = get_file_network_open_info(rsp, fp, work->response_buf); 5434 break; 5435 5436 case FILE_EA_INFORMATION: 5437 get_file_ea_info(rsp, work->response_buf); 5438 break; 5439 5440 case FILE_FULL_EA_INFORMATION: 5441 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 5442 break; 5443 5444 case FILE_POSITION_INFORMATION: 5445 get_file_position_info(rsp, fp, work->response_buf); 5446 break; 5447 5448 case FILE_MODE_INFORMATION: 5449 get_file_mode_info(rsp, fp, work->response_buf); 5450 break; 5451 5452 case FILE_COMPRESSION_INFORMATION: 5453 rc = get_file_compression_info(rsp, fp, work->response_buf); 5454 break; 5455 5456 case FILE_ATTRIBUTE_TAG_INFORMATION: 5457 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 5458 break; 5459 case SMB_FIND_FILE_POSIX_INFO: 5460 if (!work->tcon->posix_extensions) { 5461 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5462 rc = -EOPNOTSUPP; 5463 } else { 5464 rc = find_file_posix_info(rsp, fp, work->response_buf); 5465 } 5466 break; 5467 default: 5468 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 5469 fileinfoclass); 5470 rc = -EOPNOTSUPP; 5471 } 5472 if (!rc) 5473 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5474 rsp, work->response_buf); 5475 ksmbd_fd_put(work, fp); 5476 return rc; 5477 } 5478 5479 static int smb2_get_info_filesystem(struct ksmbd_work *work, 5480 struct smb2_query_info_req *req, 5481 struct smb2_query_info_rsp *rsp) 5482 { 5483 struct ksmbd_conn *conn = work->conn; 5484 struct ksmbd_share_config *share = work->tcon->share_conf; 5485 int fsinfoclass = 0; 5486 struct kstatfs stfs; 5487 struct path path; 5488 int rc = 0, len; 5489 5490 if (!share->path) 5491 return -EIO; 5492 5493 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5494 if (rc) { 5495 pr_err("cannot create vfs path\n"); 5496 return -EIO; 5497 } 5498 5499 rc = vfs_statfs(&path, &stfs); 5500 if (rc) { 5501 pr_err("cannot do stat of path %s\n", share->path); 5502 path_put(&path); 5503 return -EIO; 5504 } 5505 5506 fsinfoclass = req->FileInfoClass; 5507 5508 switch (fsinfoclass) { 5509 case FS_DEVICE_INFORMATION: 5510 { 5511 FILE_SYSTEM_DEVICE_INFO *info; 5512 5513 info = (FILE_SYSTEM_DEVICE_INFO *)rsp->Buffer; 5514 5515 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); 5516 info->DeviceCharacteristics = 5517 cpu_to_le32(FILE_DEVICE_IS_MOUNTED); 5518 if (!test_tree_conn_flag(work->tcon, 5519 KSMBD_TREE_CONN_FLAG_WRITABLE)) 5520 info->DeviceCharacteristics |= 5521 cpu_to_le32(FILE_READ_ONLY_DEVICE); 5522 rsp->OutputBufferLength = cpu_to_le32(8); 5523 break; 5524 } 5525 case FS_ATTRIBUTE_INFORMATION: 5526 { 5527 FILE_SYSTEM_ATTRIBUTE_INFO *info; 5528 size_t sz; 5529 5530 info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer; 5531 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5532 FILE_PERSISTENT_ACLS | 5533 FILE_UNICODE_ON_DISK | 5534 FILE_CASE_PRESERVED_NAMES | 5535 FILE_CASE_SENSITIVE_SEARCH | 5536 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5537 5538 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5539 5540 if (test_share_config_flag(work->tcon->share_conf, 5541 KSMBD_SHARE_FLAG_STREAMS)) 5542 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5543 5544 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5545 /* 5546 * some application(potableapp) can not run on ksmbd share 5547 * because only NTFS handle security setting on windows. 5548 * So Although local fs(EXT4 or F2fs, etc) is not NTFS, 5549 * ksmbd should show share as NTFS. Later, If needed, we can add 5550 * fs type(s) parameter to change fs type user wanted. 5551 */ 5552 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5553 "NTFS", PATH_MAX, conn->local_nls, 0); 5554 len = len * 2; 5555 info->FileSystemNameLen = cpu_to_le32(len); 5556 sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len; 5557 rsp->OutputBufferLength = cpu_to_le32(sz); 5558 break; 5559 } 5560 case FS_VOLUME_INFORMATION: 5561 { 5562 struct filesystem_vol_info *info; 5563 size_t sz; 5564 unsigned int serial_crc = 0; 5565 5566 info = (struct filesystem_vol_info *)(rsp->Buffer); 5567 info->VolumeCreationTime = 0; 5568 serial_crc = crc32_le(serial_crc, share->name, 5569 strlen(share->name)); 5570 serial_crc = crc32_le(serial_crc, share->path, 5571 strlen(share->path)); 5572 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5573 strlen(ksmbd_netbios_name())); 5574 /* Taking dummy value of serial number*/ 5575 info->SerialNumber = cpu_to_le32(serial_crc); 5576 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5577 share->name, PATH_MAX, 5578 conn->local_nls, 0); 5579 len = len * 2; 5580 info->VolumeLabelSize = cpu_to_le32(len); 5581 info->Reserved = 0; 5582 sz = sizeof(struct filesystem_vol_info) + len; 5583 rsp->OutputBufferLength = cpu_to_le32(sz); 5584 break; 5585 } 5586 case FS_SIZE_INFORMATION: 5587 { 5588 FILE_SYSTEM_SIZE_INFO *info; 5589 5590 info = (FILE_SYSTEM_SIZE_INFO *)(rsp->Buffer); 5591 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5592 info->AvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); 5593 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5594 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5595 rsp->OutputBufferLength = cpu_to_le32(24); 5596 break; 5597 } 5598 case FS_FULL_SIZE_INFORMATION: 5599 { 5600 struct smb2_fs_full_size_info *info; 5601 5602 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5603 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5604 info->CallerAvailableAllocationUnits = 5605 cpu_to_le64(stfs.f_bavail); 5606 info->ActualAvailableAllocationUnits = 5607 cpu_to_le64(stfs.f_bfree); 5608 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5609 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5610 rsp->OutputBufferLength = cpu_to_le32(32); 5611 break; 5612 } 5613 case FS_OBJECT_ID_INFORMATION: 5614 { 5615 struct object_id_info *info; 5616 5617 info = (struct object_id_info *)(rsp->Buffer); 5618 5619 if (path.mnt->mnt_sb->s_uuid_len == 16) 5620 memcpy(info->objid, path.mnt->mnt_sb->s_uuid.b, 5621 path.mnt->mnt_sb->s_uuid_len); 5622 else 5623 memcpy(info->objid, &stfs.f_fsid, sizeof(stfs.f_fsid)); 5624 5625 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5626 info->extended_info.version = cpu_to_le32(1); 5627 info->extended_info.release = cpu_to_le32(1); 5628 info->extended_info.rel_date = 0; 5629 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5630 rsp->OutputBufferLength = cpu_to_le32(64); 5631 break; 5632 } 5633 case FS_SECTOR_SIZE_INFORMATION: 5634 { 5635 struct smb3_fs_ss_info *info; 5636 unsigned int sector_size = 5637 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5638 5639 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5640 5641 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5642 info->PhysicalBytesPerSectorForAtomicity = 5643 cpu_to_le32(sector_size); 5644 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5645 info->FSEffPhysicalBytesPerSectorForAtomicity = 5646 cpu_to_le32(sector_size); 5647 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5648 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5649 info->ByteOffsetForSectorAlignment = 0; 5650 info->ByteOffsetForPartitionAlignment = 0; 5651 rsp->OutputBufferLength = cpu_to_le32(28); 5652 break; 5653 } 5654 case FS_CONTROL_INFORMATION: 5655 { 5656 /* 5657 * TODO : The current implementation is based on 5658 * test result with win7(NTFS) server. It's need to 5659 * modify this to get valid Quota values 5660 * from Linux kernel 5661 */ 5662 struct smb2_fs_control_info *info; 5663 5664 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5665 info->FreeSpaceStartFiltering = 0; 5666 info->FreeSpaceThreshold = 0; 5667 info->FreeSpaceStopFiltering = 0; 5668 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5669 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5670 info->Padding = 0; 5671 rsp->OutputBufferLength = cpu_to_le32(48); 5672 break; 5673 } 5674 case FS_POSIX_INFORMATION: 5675 { 5676 FILE_SYSTEM_POSIX_INFO *info; 5677 5678 if (!work->tcon->posix_extensions) { 5679 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5680 path_put(&path); 5681 return -EOPNOTSUPP; 5682 } else { 5683 info = (FILE_SYSTEM_POSIX_INFO *)(rsp->Buffer); 5684 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5685 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5686 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5687 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5688 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5689 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5690 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5691 rsp->OutputBufferLength = cpu_to_le32(56); 5692 } 5693 break; 5694 } 5695 default: 5696 path_put(&path); 5697 return -EOPNOTSUPP; 5698 } 5699 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5700 rsp, work->response_buf); 5701 path_put(&path); 5702 return rc; 5703 } 5704 5705 static int smb2_get_info_sec(struct ksmbd_work *work, 5706 struct smb2_query_info_req *req, 5707 struct smb2_query_info_rsp *rsp) 5708 { 5709 struct ksmbd_file *fp; 5710 struct mnt_idmap *idmap; 5711 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5712 struct smb_fattr fattr = {{0}}; 5713 struct inode *inode; 5714 __u32 secdesclen = 0; 5715 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5716 int addition_info = le32_to_cpu(req->AdditionalInformation); 5717 int rc = 0, ppntsd_size = 0; 5718 5719 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5720 PROTECTED_DACL_SECINFO | 5721 UNPROTECTED_DACL_SECINFO)) { 5722 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5723 addition_info); 5724 5725 pntsd->revision = cpu_to_le16(1); 5726 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5727 pntsd->osidoffset = 0; 5728 pntsd->gsidoffset = 0; 5729 pntsd->sacloffset = 0; 5730 pntsd->dacloffset = 0; 5731 5732 secdesclen = sizeof(struct smb_ntsd); 5733 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5734 5735 return 0; 5736 } 5737 5738 if (work->next_smb2_rcv_hdr_off) { 5739 if (!has_file_id(req->VolatileFileId)) { 5740 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5741 work->compound_fid); 5742 id = work->compound_fid; 5743 pid = work->compound_pfid; 5744 } 5745 } 5746 5747 if (!has_file_id(id)) { 5748 id = req->VolatileFileId; 5749 pid = req->PersistentFileId; 5750 } 5751 5752 fp = ksmbd_lookup_fd_slow(work, id, pid); 5753 if (!fp) 5754 return -ENOENT; 5755 5756 idmap = file_mnt_idmap(fp->filp); 5757 inode = file_inode(fp->filp); 5758 ksmbd_acls_fattr(&fattr, idmap, inode); 5759 5760 if (test_share_config_flag(work->tcon->share_conf, 5761 KSMBD_SHARE_FLAG_ACL_XATTR)) 5762 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5763 fp->filp->f_path.dentry, 5764 &ppntsd); 5765 5766 /* Check if sd buffer size exceeds response buffer size */ 5767 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5768 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5769 addition_info, &secdesclen, &fattr); 5770 posix_acl_release(fattr.cf_acls); 5771 posix_acl_release(fattr.cf_dacls); 5772 kfree(ppntsd); 5773 ksmbd_fd_put(work, fp); 5774 if (rc) 5775 return rc; 5776 5777 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5778 return 0; 5779 } 5780 5781 /** 5782 * smb2_query_info() - handler for smb2 query info command 5783 * @work: smb work containing query info request buffer 5784 * 5785 * Return: 0 on success, otherwise error 5786 */ 5787 int smb2_query_info(struct ksmbd_work *work) 5788 { 5789 struct smb2_query_info_req *req; 5790 struct smb2_query_info_rsp *rsp; 5791 int rc = 0; 5792 5793 ksmbd_debug(SMB, "Received request smb2 query info request\n"); 5794 5795 WORK_BUFFERS(work, req, rsp); 5796 5797 if (ksmbd_override_fsids(work)) { 5798 rc = -ENOMEM; 5799 goto err_out; 5800 } 5801 5802 switch (req->InfoType) { 5803 case SMB2_O_INFO_FILE: 5804 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5805 rc = smb2_get_info_file(work, req, rsp); 5806 break; 5807 case SMB2_O_INFO_FILESYSTEM: 5808 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5809 rc = smb2_get_info_filesystem(work, req, rsp); 5810 break; 5811 case SMB2_O_INFO_SECURITY: 5812 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5813 rc = smb2_get_info_sec(work, req, rsp); 5814 break; 5815 default: 5816 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5817 req->InfoType); 5818 rc = -EOPNOTSUPP; 5819 } 5820 ksmbd_revert_fsids(work); 5821 5822 if (!rc) { 5823 rsp->StructureSize = cpu_to_le16(9); 5824 rsp->OutputBufferOffset = cpu_to_le16(72); 5825 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5826 offsetof(struct smb2_query_info_rsp, Buffer) + 5827 le32_to_cpu(rsp->OutputBufferLength)); 5828 } 5829 5830 err_out: 5831 if (rc < 0) { 5832 if (rc == -EACCES) 5833 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5834 else if (rc == -ENOENT) 5835 rsp->hdr.Status = STATUS_FILE_CLOSED; 5836 else if (rc == -EIO) 5837 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5838 else if (rc == -ENOMEM) 5839 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5840 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5841 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5842 smb2_set_err_rsp(work); 5843 5844 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5845 rc); 5846 return rc; 5847 } 5848 return 0; 5849 } 5850 5851 /** 5852 * smb2_close_pipe() - handler for closing IPC pipe 5853 * @work: smb work containing close request buffer 5854 * 5855 * Return: 0 5856 */ 5857 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5858 { 5859 u64 id; 5860 struct smb2_close_req *req; 5861 struct smb2_close_rsp *rsp; 5862 5863 WORK_BUFFERS(work, req, rsp); 5864 5865 id = req->VolatileFileId; 5866 ksmbd_session_rpc_close(work->sess, id); 5867 5868 rsp->StructureSize = cpu_to_le16(60); 5869 rsp->Flags = 0; 5870 rsp->Reserved = 0; 5871 rsp->CreationTime = 0; 5872 rsp->LastAccessTime = 0; 5873 rsp->LastWriteTime = 0; 5874 rsp->ChangeTime = 0; 5875 rsp->AllocationSize = 0; 5876 rsp->EndOfFile = 0; 5877 rsp->Attributes = 0; 5878 5879 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5880 sizeof(struct smb2_close_rsp)); 5881 } 5882 5883 /** 5884 * smb2_close() - handler for smb2 close file command 5885 * @work: smb work containing close request buffer 5886 * 5887 * Return: 0 on success, otherwise error 5888 */ 5889 int smb2_close(struct ksmbd_work *work) 5890 { 5891 u64 volatile_id = KSMBD_NO_FID; 5892 u64 sess_id; 5893 struct smb2_close_req *req; 5894 struct smb2_close_rsp *rsp; 5895 struct ksmbd_conn *conn = work->conn; 5896 struct ksmbd_file *fp; 5897 u64 time; 5898 int err = 0; 5899 5900 ksmbd_debug(SMB, "Received smb2 close request\n"); 5901 5902 WORK_BUFFERS(work, req, rsp); 5903 5904 if (test_share_config_flag(work->tcon->share_conf, 5905 KSMBD_SHARE_FLAG_PIPE)) { 5906 ksmbd_debug(SMB, "IPC pipe close request\n"); 5907 return smb2_close_pipe(work); 5908 } 5909 5910 sess_id = le64_to_cpu(req->hdr.SessionId); 5911 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5912 sess_id = work->compound_sid; 5913 5914 work->compound_sid = 0; 5915 if (check_session_id(conn, sess_id)) { 5916 work->compound_sid = sess_id; 5917 } else { 5918 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5919 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5920 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5921 err = -EBADF; 5922 goto out; 5923 } 5924 5925 if (work->next_smb2_rcv_hdr_off && 5926 !has_file_id(req->VolatileFileId)) { 5927 if (!has_file_id(work->compound_fid)) { 5928 /* file already closed, return FILE_CLOSED */ 5929 ksmbd_debug(SMB, "file already closed\n"); 5930 rsp->hdr.Status = STATUS_FILE_CLOSED; 5931 err = -EBADF; 5932 goto out; 5933 } else { 5934 ksmbd_debug(SMB, 5935 "Compound request set FID = %llu:%llu\n", 5936 work->compound_fid, 5937 work->compound_pfid); 5938 volatile_id = work->compound_fid; 5939 5940 /* file closed, stored id is not valid anymore */ 5941 work->compound_fid = KSMBD_NO_FID; 5942 work->compound_pfid = KSMBD_NO_FID; 5943 } 5944 } else { 5945 volatile_id = req->VolatileFileId; 5946 } 5947 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5948 5949 rsp->StructureSize = cpu_to_le16(60); 5950 rsp->Reserved = 0; 5951 5952 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5953 struct kstat stat; 5954 int ret; 5955 5956 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5957 if (!fp) { 5958 err = -ENOENT; 5959 goto out; 5960 } 5961 5962 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5963 AT_STATX_SYNC_AS_STAT); 5964 if (ret) { 5965 ksmbd_fd_put(work, fp); 5966 goto out; 5967 } 5968 5969 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5970 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 5971 cpu_to_le64(stat.blocks << 9); 5972 rsp->EndOfFile = cpu_to_le64(stat.size); 5973 rsp->Attributes = fp->f_ci->m_fattr; 5974 rsp->CreationTime = cpu_to_le64(fp->create_time); 5975 time = ksmbd_UnixTimeToNT(stat.atime); 5976 rsp->LastAccessTime = cpu_to_le64(time); 5977 time = ksmbd_UnixTimeToNT(stat.mtime); 5978 rsp->LastWriteTime = cpu_to_le64(time); 5979 time = ksmbd_UnixTimeToNT(stat.ctime); 5980 rsp->ChangeTime = cpu_to_le64(time); 5981 ksmbd_fd_put(work, fp); 5982 } else { 5983 rsp->Flags = 0; 5984 rsp->AllocationSize = 0; 5985 rsp->EndOfFile = 0; 5986 rsp->Attributes = 0; 5987 rsp->CreationTime = 0; 5988 rsp->LastAccessTime = 0; 5989 rsp->LastWriteTime = 0; 5990 rsp->ChangeTime = 0; 5991 } 5992 5993 err = ksmbd_close_fd(work, volatile_id); 5994 out: 5995 if (!err) 5996 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 5997 sizeof(struct smb2_close_rsp)); 5998 5999 if (err) { 6000 if (rsp->hdr.Status == 0) 6001 rsp->hdr.Status = STATUS_FILE_CLOSED; 6002 smb2_set_err_rsp(work); 6003 } 6004 6005 return err; 6006 } 6007 6008 /** 6009 * smb2_echo() - handler for smb2 echo(ping) command 6010 * @work: smb work containing echo request buffer 6011 * 6012 * Return: 0 on success, otherwise error 6013 */ 6014 int smb2_echo(struct ksmbd_work *work) 6015 { 6016 struct smb2_echo_rsp *rsp = smb_get_msg(work->response_buf); 6017 6018 ksmbd_debug(SMB, "Received smb2 echo request\n"); 6019 6020 if (work->next_smb2_rcv_hdr_off) 6021 rsp = ksmbd_resp_buf_next(work); 6022 6023 rsp->StructureSize = cpu_to_le16(4); 6024 rsp->Reserved = 0; 6025 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 6026 } 6027 6028 static int smb2_rename(struct ksmbd_work *work, 6029 struct ksmbd_file *fp, 6030 struct smb2_file_rename_info *file_info, 6031 struct nls_table *local_nls) 6032 { 6033 struct ksmbd_share_config *share = fp->tcon->share_conf; 6034 char *new_name = NULL; 6035 int rc, flags = 0; 6036 6037 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 6038 new_name = smb2_get_name(file_info->FileName, 6039 le32_to_cpu(file_info->FileNameLength), 6040 local_nls); 6041 if (IS_ERR(new_name)) 6042 return PTR_ERR(new_name); 6043 6044 if (fp->is_posix_ctxt == false && strchr(new_name, ':')) { 6045 int s_type; 6046 char *xattr_stream_name, *stream_name = NULL; 6047 size_t xattr_stream_size; 6048 int len; 6049 6050 rc = parse_stream_name(new_name, &stream_name, &s_type); 6051 if (rc < 0) 6052 goto out; 6053 6054 len = strlen(new_name); 6055 if (len > 0 && new_name[len - 1] != '/') { 6056 pr_err("not allow base filename in rename\n"); 6057 rc = -ESHARE; 6058 goto out; 6059 } 6060 6061 rc = ksmbd_vfs_xattr_stream_name(stream_name, 6062 &xattr_stream_name, 6063 &xattr_stream_size, 6064 s_type); 6065 if (rc) 6066 goto out; 6067 6068 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 6069 &fp->filp->f_path, 6070 xattr_stream_name, 6071 NULL, 0, 0, true); 6072 if (rc < 0) { 6073 pr_err("failed to store stream name in xattr: %d\n", 6074 rc); 6075 rc = -EINVAL; 6076 goto out; 6077 } 6078 6079 goto out; 6080 } 6081 6082 ksmbd_debug(SMB, "new name %s\n", new_name); 6083 if (ksmbd_share_veto_filename(share, new_name)) { 6084 rc = -ENOENT; 6085 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 6086 goto out; 6087 } 6088 6089 if (!file_info->ReplaceIfExists) 6090 flags = RENAME_NOREPLACE; 6091 6092 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 6093 if (!rc) 6094 smb_break_all_levII_oplock(work, fp, 0); 6095 out: 6096 kfree(new_name); 6097 return rc; 6098 } 6099 6100 static int smb2_create_link(struct ksmbd_work *work, 6101 struct ksmbd_share_config *share, 6102 struct smb2_file_link_info *file_info, 6103 unsigned int buf_len, struct file *filp, 6104 struct nls_table *local_nls) 6105 { 6106 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 6107 struct path path; 6108 int rc; 6109 6110 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 6111 le32_to_cpu(file_info->FileNameLength)) 6112 return -EINVAL; 6113 6114 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 6115 pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP); 6116 if (!pathname) 6117 return -ENOMEM; 6118 6119 link_name = smb2_get_name(file_info->FileName, 6120 le32_to_cpu(file_info->FileNameLength), 6121 local_nls); 6122 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 6123 rc = -EINVAL; 6124 goto out; 6125 } 6126 6127 ksmbd_debug(SMB, "link name is %s\n", link_name); 6128 target_name = file_path(filp, pathname, PATH_MAX); 6129 if (IS_ERR(target_name)) { 6130 rc = -EINVAL; 6131 goto out; 6132 } 6133 6134 ksmbd_debug(SMB, "target name is %s\n", target_name); 6135 rc = ksmbd_vfs_kern_path_start_removing(work, link_name, LOOKUP_NO_SYMLINKS, 6136 &path, 0); 6137 if (rc) { 6138 if (rc != -ENOENT) 6139 goto out; 6140 } else { 6141 if (file_info->ReplaceIfExists) { 6142 rc = ksmbd_vfs_remove_file(work, &path); 6143 if (rc) { 6144 rc = -EINVAL; 6145 ksmbd_debug(SMB, "cannot delete %s\n", 6146 link_name); 6147 } 6148 } else { 6149 rc = -EEXIST; 6150 ksmbd_debug(SMB, "link already exists\n"); 6151 } 6152 ksmbd_vfs_kern_path_end_removing(&path); 6153 if (rc) 6154 goto out; 6155 } 6156 rc = ksmbd_vfs_link(work, target_name, link_name); 6157 if (rc) 6158 rc = -EINVAL; 6159 out: 6160 6161 if (!IS_ERR(link_name)) 6162 kfree(link_name); 6163 kfree(pathname); 6164 return rc; 6165 } 6166 6167 static int set_file_basic_info(struct ksmbd_file *fp, 6168 struct smb2_file_basic_info *file_info, 6169 struct ksmbd_share_config *share) 6170 { 6171 struct iattr attrs; 6172 struct file *filp; 6173 struct inode *inode; 6174 struct mnt_idmap *idmap; 6175 int rc = 0; 6176 6177 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 6178 return -EACCES; 6179 6180 attrs.ia_valid = 0; 6181 filp = fp->filp; 6182 inode = file_inode(filp); 6183 idmap = file_mnt_idmap(filp); 6184 6185 if (file_info->CreationTime) 6186 fp->create_time = le64_to_cpu(file_info->CreationTime); 6187 6188 if (file_info->LastAccessTime) { 6189 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 6190 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 6191 } 6192 6193 if (file_info->ChangeTime) 6194 inode_set_ctime_to_ts(inode, 6195 ksmbd_NTtimeToUnix(file_info->ChangeTime)); 6196 6197 if (file_info->LastWriteTime) { 6198 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 6199 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME); 6200 } 6201 6202 if (file_info->Attributes) { 6203 if (!S_ISDIR(inode->i_mode) && 6204 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 6205 pr_err("can't change a file to a directory\n"); 6206 return -EINVAL; 6207 } 6208 6209 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 6210 fp->f_ci->m_fattr = file_info->Attributes | 6211 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 6212 } 6213 6214 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 6215 (file_info->CreationTime || file_info->Attributes)) { 6216 struct xattr_dos_attrib da = {0}; 6217 6218 da.version = 4; 6219 da.itime = fp->itime; 6220 da.create_time = fp->create_time; 6221 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 6222 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 6223 XATTR_DOSINFO_ITIME; 6224 6225 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 6226 true); 6227 if (rc) 6228 ksmbd_debug(SMB, 6229 "failed to restore file attribute in EA\n"); 6230 rc = 0; 6231 } 6232 6233 if (attrs.ia_valid) { 6234 struct dentry *dentry = filp->f_path.dentry; 6235 struct inode *inode = d_inode(dentry); 6236 6237 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 6238 return -EACCES; 6239 6240 inode_lock(inode); 6241 rc = notify_change(idmap, dentry, &attrs, NULL); 6242 inode_unlock(inode); 6243 } 6244 return rc; 6245 } 6246 6247 static int set_file_allocation_info(struct ksmbd_work *work, 6248 struct ksmbd_file *fp, 6249 struct smb2_file_alloc_info *file_alloc_info) 6250 { 6251 /* 6252 * TODO : It's working fine only when store dos attributes 6253 * is not yes. need to implement a logic which works 6254 * properly with any smb.conf option 6255 */ 6256 6257 loff_t alloc_blks; 6258 struct inode *inode; 6259 struct kstat stat; 6260 int rc; 6261 6262 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6263 return -EACCES; 6264 6265 if (ksmbd_stream_fd(fp) == true) 6266 return 0; 6267 6268 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6269 AT_STATX_SYNC_AS_STAT); 6270 if (rc) 6271 return rc; 6272 6273 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 6274 inode = file_inode(fp->filp); 6275 6276 if (alloc_blks > stat.blocks) { 6277 smb_break_all_levII_oplock(work, fp, 1); 6278 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 6279 alloc_blks * 512); 6280 if (rc && rc != -EOPNOTSUPP) { 6281 pr_err("vfs_fallocate is failed : %d\n", rc); 6282 return rc; 6283 } 6284 } else if (alloc_blks < stat.blocks) { 6285 loff_t size; 6286 6287 /* 6288 * Allocation size could be smaller than original one 6289 * which means allocated blocks in file should be 6290 * deallocated. use truncate to cut out it, but inode 6291 * size is also updated with truncate offset. 6292 * inode size is retained by backup inode size. 6293 */ 6294 size = i_size_read(inode); 6295 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 6296 if (rc) { 6297 pr_err("truncate failed!, err %d\n", rc); 6298 return rc; 6299 } 6300 if (size < alloc_blks * 512) 6301 i_size_write(inode, size); 6302 } 6303 return 0; 6304 } 6305 6306 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6307 struct smb2_file_eof_info *file_eof_info) 6308 { 6309 loff_t newsize; 6310 struct inode *inode; 6311 int rc; 6312 6313 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6314 return -EACCES; 6315 6316 newsize = le64_to_cpu(file_eof_info->EndOfFile); 6317 inode = file_inode(fp->filp); 6318 6319 /* 6320 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 6321 * on FAT32 shared device, truncate execution time is too long 6322 * and network error could cause from windows client. because 6323 * truncate of some filesystem like FAT32 fill zero data in 6324 * truncated range. 6325 */ 6326 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC && 6327 ksmbd_stream_fd(fp) == false) { 6328 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 6329 rc = ksmbd_vfs_truncate(work, fp, newsize); 6330 if (rc) { 6331 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 6332 if (rc != -EAGAIN) 6333 rc = -EBADF; 6334 return rc; 6335 } 6336 } 6337 return 0; 6338 } 6339 6340 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6341 struct smb2_file_rename_info *rename_info, 6342 unsigned int buf_len) 6343 { 6344 if (!(fp->daccess & FILE_DELETE_LE)) { 6345 pr_err("no right to delete : 0x%x\n", fp->daccess); 6346 return -EACCES; 6347 } 6348 6349 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 6350 le32_to_cpu(rename_info->FileNameLength)) 6351 return -EINVAL; 6352 6353 if (!le32_to_cpu(rename_info->FileNameLength)) 6354 return -EINVAL; 6355 6356 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 6357 } 6358 6359 static int set_file_disposition_info(struct ksmbd_file *fp, 6360 struct smb2_file_disposition_info *file_info) 6361 { 6362 struct inode *inode; 6363 6364 if (!(fp->daccess & FILE_DELETE_LE)) { 6365 pr_err("no right to delete : 0x%x\n", fp->daccess); 6366 return -EACCES; 6367 } 6368 6369 inode = file_inode(fp->filp); 6370 if (file_info->DeletePending) { 6371 if (S_ISDIR(inode->i_mode) && 6372 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 6373 return -EBUSY; 6374 ksmbd_set_inode_pending_delete(fp); 6375 } else { 6376 ksmbd_clear_inode_pending_delete(fp); 6377 } 6378 return 0; 6379 } 6380 6381 static int set_file_position_info(struct ksmbd_file *fp, 6382 struct smb2_file_pos_info *file_info) 6383 { 6384 loff_t current_byte_offset; 6385 unsigned long sector_size; 6386 struct inode *inode; 6387 6388 inode = file_inode(fp->filp); 6389 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 6390 sector_size = inode->i_sb->s_blocksize; 6391 6392 if (current_byte_offset < 0 || 6393 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 6394 current_byte_offset & (sector_size - 1))) { 6395 pr_err("CurrentByteOffset is not valid : %llu\n", 6396 current_byte_offset); 6397 return -EINVAL; 6398 } 6399 6400 if (ksmbd_stream_fd(fp) == false) 6401 fp->filp->f_pos = current_byte_offset; 6402 else { 6403 if (current_byte_offset > XATTR_SIZE_MAX) 6404 current_byte_offset = XATTR_SIZE_MAX; 6405 fp->stream.pos = current_byte_offset; 6406 } 6407 return 0; 6408 } 6409 6410 static int set_file_mode_info(struct ksmbd_file *fp, 6411 struct smb2_file_mode_info *file_info) 6412 { 6413 __le32 mode; 6414 6415 mode = file_info->Mode; 6416 6417 if ((mode & ~FILE_MODE_INFO_MASK)) { 6418 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 6419 return -EINVAL; 6420 } 6421 6422 /* 6423 * TODO : need to implement consideration for 6424 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 6425 */ 6426 ksmbd_vfs_set_fadvise(fp->filp, mode); 6427 fp->coption = mode; 6428 return 0; 6429 } 6430 6431 /** 6432 * smb2_set_info_file() - handler for smb2 set info command 6433 * @work: smb work containing set info command buffer 6434 * @fp: ksmbd_file pointer 6435 * @req: request buffer pointer 6436 * @share: ksmbd_share_config pointer 6437 * 6438 * Return: 0 on success, otherwise error 6439 */ 6440 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 6441 struct smb2_set_info_req *req, 6442 struct ksmbd_share_config *share) 6443 { 6444 unsigned int buf_len = le32_to_cpu(req->BufferLength); 6445 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); 6446 6447 switch (req->FileInfoClass) { 6448 case FILE_BASIC_INFORMATION: 6449 { 6450 if (buf_len < sizeof(struct smb2_file_basic_info)) 6451 return -EMSGSIZE; 6452 6453 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share); 6454 } 6455 case FILE_ALLOCATION_INFORMATION: 6456 { 6457 if (buf_len < sizeof(struct smb2_file_alloc_info)) 6458 return -EMSGSIZE; 6459 6460 return set_file_allocation_info(work, fp, 6461 (struct smb2_file_alloc_info *)buffer); 6462 } 6463 case FILE_END_OF_FILE_INFORMATION: 6464 { 6465 if (buf_len < sizeof(struct smb2_file_eof_info)) 6466 return -EMSGSIZE; 6467 6468 return set_end_of_file_info(work, fp, 6469 (struct smb2_file_eof_info *)buffer); 6470 } 6471 case FILE_RENAME_INFORMATION: 6472 { 6473 if (buf_len < sizeof(struct smb2_file_rename_info)) 6474 return -EMSGSIZE; 6475 6476 return set_rename_info(work, fp, 6477 (struct smb2_file_rename_info *)buffer, 6478 buf_len); 6479 } 6480 case FILE_LINK_INFORMATION: 6481 { 6482 if (buf_len < sizeof(struct smb2_file_link_info)) 6483 return -EMSGSIZE; 6484 6485 return smb2_create_link(work, work->tcon->share_conf, 6486 (struct smb2_file_link_info *)buffer, 6487 buf_len, fp->filp, 6488 work->conn->local_nls); 6489 } 6490 case FILE_DISPOSITION_INFORMATION: 6491 { 6492 if (buf_len < sizeof(struct smb2_file_disposition_info)) 6493 return -EMSGSIZE; 6494 6495 return set_file_disposition_info(fp, 6496 (struct smb2_file_disposition_info *)buffer); 6497 } 6498 case FILE_FULL_EA_INFORMATION: 6499 { 6500 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 6501 pr_err("Not permitted to write ext attr: 0x%x\n", 6502 fp->daccess); 6503 return -EACCES; 6504 } 6505 6506 if (buf_len < sizeof(struct smb2_ea_info)) 6507 return -EMSGSIZE; 6508 6509 return smb2_set_ea((struct smb2_ea_info *)buffer, 6510 buf_len, &fp->filp->f_path, true); 6511 } 6512 case FILE_POSITION_INFORMATION: 6513 { 6514 if (buf_len < sizeof(struct smb2_file_pos_info)) 6515 return -EMSGSIZE; 6516 6517 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); 6518 } 6519 case FILE_MODE_INFORMATION: 6520 { 6521 if (buf_len < sizeof(struct smb2_file_mode_info)) 6522 return -EMSGSIZE; 6523 6524 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); 6525 } 6526 } 6527 6528 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6529 return -EOPNOTSUPP; 6530 } 6531 6532 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6533 char *buffer, int buf_len) 6534 { 6535 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6536 6537 fp->saccess |= FILE_SHARE_DELETE_LE; 6538 6539 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6540 buf_len, false, true); 6541 } 6542 6543 /** 6544 * smb2_set_info() - handler for smb2 set info command handler 6545 * @work: smb work containing set info request buffer 6546 * 6547 * Return: 0 on success, otherwise error 6548 */ 6549 int smb2_set_info(struct ksmbd_work *work) 6550 { 6551 struct smb2_set_info_req *req; 6552 struct smb2_set_info_rsp *rsp; 6553 struct ksmbd_file *fp = NULL; 6554 int rc = 0; 6555 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6556 6557 ksmbd_debug(SMB, "Received smb2 set info request\n"); 6558 6559 if (work->next_smb2_rcv_hdr_off) { 6560 req = ksmbd_req_buf_next(work); 6561 rsp = ksmbd_resp_buf_next(work); 6562 if (!has_file_id(req->VolatileFileId)) { 6563 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6564 work->compound_fid); 6565 id = work->compound_fid; 6566 pid = work->compound_pfid; 6567 } 6568 } else { 6569 req = smb_get_msg(work->request_buf); 6570 rsp = smb_get_msg(work->response_buf); 6571 } 6572 6573 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6574 ksmbd_debug(SMB, "User does not have write permission\n"); 6575 pr_err("User does not have write permission\n"); 6576 rc = -EACCES; 6577 goto err_out; 6578 } 6579 6580 if (!has_file_id(id)) { 6581 id = req->VolatileFileId; 6582 pid = req->PersistentFileId; 6583 } 6584 6585 fp = ksmbd_lookup_fd_slow(work, id, pid); 6586 if (!fp) { 6587 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6588 rc = -ENOENT; 6589 goto err_out; 6590 } 6591 6592 switch (req->InfoType) { 6593 case SMB2_O_INFO_FILE: 6594 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6595 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6596 break; 6597 case SMB2_O_INFO_SECURITY: 6598 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6599 if (ksmbd_override_fsids(work)) { 6600 rc = -ENOMEM; 6601 goto err_out; 6602 } 6603 rc = smb2_set_info_sec(fp, 6604 le32_to_cpu(req->AdditionalInformation), 6605 (char *)req + le16_to_cpu(req->BufferOffset), 6606 le32_to_cpu(req->BufferLength)); 6607 ksmbd_revert_fsids(work); 6608 break; 6609 default: 6610 rc = -EOPNOTSUPP; 6611 } 6612 6613 if (rc < 0) 6614 goto err_out; 6615 6616 rsp->StructureSize = cpu_to_le16(2); 6617 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6618 sizeof(struct smb2_set_info_rsp)); 6619 if (rc) 6620 goto err_out; 6621 ksmbd_fd_put(work, fp); 6622 return 0; 6623 6624 err_out: 6625 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6626 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6627 else if (rc == -EINVAL) 6628 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6629 else if (rc == -EMSGSIZE) 6630 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 6631 else if (rc == -ESHARE) 6632 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6633 else if (rc == -ENOENT) 6634 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6635 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6636 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6637 else if (rc == -EAGAIN) 6638 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6639 else if (rc == -EBADF || rc == -ESTALE) 6640 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6641 else if (rc == -EEXIST) 6642 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6643 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6644 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6645 smb2_set_err_rsp(work); 6646 ksmbd_fd_put(work, fp); 6647 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6648 return rc; 6649 } 6650 6651 /** 6652 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6653 * @work: smb work containing read IPC pipe command buffer 6654 * 6655 * Return: 0 on success, otherwise error 6656 */ 6657 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6658 { 6659 int nbytes = 0, err; 6660 u64 id; 6661 struct ksmbd_rpc_command *rpc_resp; 6662 struct smb2_read_req *req; 6663 struct smb2_read_rsp *rsp; 6664 6665 WORK_BUFFERS(work, req, rsp); 6666 6667 id = req->VolatileFileId; 6668 6669 rpc_resp = ksmbd_rpc_read(work->sess, id); 6670 if (rpc_resp) { 6671 void *aux_payload_buf; 6672 6673 if (rpc_resp->flags != KSMBD_RPC_OK) { 6674 err = -EINVAL; 6675 goto out; 6676 } 6677 6678 aux_payload_buf = 6679 kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP); 6680 if (!aux_payload_buf) { 6681 err = -ENOMEM; 6682 goto out; 6683 } 6684 6685 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6686 6687 nbytes = rpc_resp->payload_sz; 6688 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6689 offsetof(struct smb2_read_rsp, Buffer), 6690 aux_payload_buf, nbytes); 6691 if (err) { 6692 kvfree(aux_payload_buf); 6693 goto out; 6694 } 6695 kvfree(rpc_resp); 6696 } else { 6697 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6698 offsetof(struct smb2_read_rsp, Buffer)); 6699 if (err) 6700 goto out; 6701 } 6702 6703 rsp->StructureSize = cpu_to_le16(17); 6704 rsp->DataOffset = 80; 6705 rsp->Reserved = 0; 6706 rsp->DataLength = cpu_to_le32(nbytes); 6707 rsp->DataRemaining = 0; 6708 rsp->Flags = 0; 6709 return 0; 6710 6711 out: 6712 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6713 smb2_set_err_rsp(work); 6714 kvfree(rpc_resp); 6715 return err; 6716 } 6717 6718 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6719 struct smbdirect_buffer_descriptor_v1 *desc, 6720 __le32 Channel, 6721 __le16 ChannelInfoLength) 6722 { 6723 unsigned int i, ch_count; 6724 6725 if (work->conn->dialect == SMB30_PROT_ID && 6726 Channel != SMB2_CHANNEL_RDMA_V1) 6727 return -EINVAL; 6728 6729 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6730 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6731 for (i = 0; i < ch_count; i++) { 6732 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6733 i, 6734 le32_to_cpu(desc[i].token), 6735 le32_to_cpu(desc[i].length)); 6736 } 6737 } 6738 if (!ch_count) 6739 return -EINVAL; 6740 6741 work->need_invalidate_rkey = 6742 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6743 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6744 work->remote_key = le32_to_cpu(desc->token); 6745 return 0; 6746 } 6747 6748 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6749 struct smb2_read_req *req, void *data_buf, 6750 size_t length) 6751 { 6752 int err; 6753 6754 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6755 (struct smbdirect_buffer_descriptor_v1 *) 6756 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6757 le16_to_cpu(req->ReadChannelInfoLength)); 6758 if (err) 6759 return err; 6760 6761 return length; 6762 } 6763 6764 /** 6765 * smb2_read() - handler for smb2 read from file 6766 * @work: smb work containing read command buffer 6767 * 6768 * Return: 0 on success, otherwise error 6769 */ 6770 int smb2_read(struct ksmbd_work *work) 6771 { 6772 struct ksmbd_conn *conn = work->conn; 6773 struct smb2_read_req *req; 6774 struct smb2_read_rsp *rsp; 6775 struct ksmbd_file *fp = NULL; 6776 loff_t offset; 6777 size_t length, mincount; 6778 ssize_t nbytes = 0, remain_bytes = 0; 6779 int err = 0; 6780 bool is_rdma_channel = false; 6781 unsigned int max_read_size = conn->vals->max_read_size; 6782 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6783 void *aux_payload_buf; 6784 6785 ksmbd_debug(SMB, "Received smb2 read request\n"); 6786 6787 if (test_share_config_flag(work->tcon->share_conf, 6788 KSMBD_SHARE_FLAG_PIPE)) { 6789 ksmbd_debug(SMB, "IPC pipe read request\n"); 6790 return smb2_read_pipe(work); 6791 } 6792 6793 if (work->next_smb2_rcv_hdr_off) { 6794 req = ksmbd_req_buf_next(work); 6795 rsp = ksmbd_resp_buf_next(work); 6796 if (!has_file_id(req->VolatileFileId)) { 6797 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6798 work->compound_fid); 6799 id = work->compound_fid; 6800 pid = work->compound_pfid; 6801 } 6802 } else { 6803 req = smb_get_msg(work->request_buf); 6804 rsp = smb_get_msg(work->response_buf); 6805 } 6806 6807 if (!has_file_id(id)) { 6808 id = req->VolatileFileId; 6809 pid = req->PersistentFileId; 6810 } 6811 6812 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6813 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6814 is_rdma_channel = true; 6815 max_read_size = get_smbd_max_read_write_size(work->conn->transport); 6816 if (max_read_size == 0) { 6817 err = -EINVAL; 6818 goto out; 6819 } 6820 } 6821 6822 if (is_rdma_channel == true) { 6823 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6824 6825 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6826 err = -EINVAL; 6827 goto out; 6828 } 6829 err = smb2_set_remote_key_for_rdma(work, 6830 (struct smbdirect_buffer_descriptor_v1 *) 6831 ((char *)req + ch_offset), 6832 req->Channel, 6833 req->ReadChannelInfoLength); 6834 if (err) 6835 goto out; 6836 } 6837 6838 fp = ksmbd_lookup_fd_slow(work, id, pid); 6839 if (!fp) { 6840 err = -ENOENT; 6841 goto out; 6842 } 6843 6844 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6845 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6846 err = -EACCES; 6847 goto out; 6848 } 6849 6850 offset = le64_to_cpu(req->Offset); 6851 if (offset < 0) { 6852 err = -EINVAL; 6853 goto out; 6854 } 6855 length = le32_to_cpu(req->Length); 6856 mincount = le32_to_cpu(req->MinimumCount); 6857 6858 if (length > max_read_size) { 6859 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6860 max_read_size); 6861 err = -EINVAL; 6862 goto out; 6863 } 6864 6865 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6866 fp->filp, offset, length); 6867 6868 aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP); 6869 if (!aux_payload_buf) { 6870 err = -ENOMEM; 6871 goto out; 6872 } 6873 6874 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6875 if (nbytes < 0) { 6876 kvfree(aux_payload_buf); 6877 err = nbytes; 6878 goto out; 6879 } 6880 6881 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6882 kvfree(aux_payload_buf); 6883 rsp->hdr.Status = STATUS_END_OF_FILE; 6884 smb2_set_err_rsp(work); 6885 ksmbd_fd_put(work, fp); 6886 return -ENODATA; 6887 } 6888 6889 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6890 nbytes, offset, mincount); 6891 6892 if (is_rdma_channel == true) { 6893 /* write data to the client using rdma channel */ 6894 remain_bytes = smb2_read_rdma_channel(work, req, 6895 aux_payload_buf, 6896 nbytes); 6897 kvfree(aux_payload_buf); 6898 aux_payload_buf = NULL; 6899 nbytes = 0; 6900 if (remain_bytes < 0) { 6901 err = (int)remain_bytes; 6902 goto out; 6903 } 6904 } 6905 6906 rsp->StructureSize = cpu_to_le16(17); 6907 rsp->DataOffset = 80; 6908 rsp->Reserved = 0; 6909 rsp->DataLength = cpu_to_le32(nbytes); 6910 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6911 rsp->Flags = 0; 6912 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6913 offsetof(struct smb2_read_rsp, Buffer), 6914 aux_payload_buf, nbytes); 6915 if (err) { 6916 kvfree(aux_payload_buf); 6917 goto out; 6918 } 6919 ksmbd_fd_put(work, fp); 6920 return 0; 6921 6922 out: 6923 if (err) { 6924 if (err == -EISDIR) 6925 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6926 else if (err == -EAGAIN) 6927 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6928 else if (err == -ENOENT) 6929 rsp->hdr.Status = STATUS_FILE_CLOSED; 6930 else if (err == -EACCES) 6931 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6932 else if (err == -ESHARE) 6933 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6934 else if (err == -EINVAL) 6935 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6936 else 6937 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6938 6939 smb2_set_err_rsp(work); 6940 } 6941 ksmbd_fd_put(work, fp); 6942 return err; 6943 } 6944 6945 /** 6946 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6947 * @work: smb work containing write IPC pipe command buffer 6948 * 6949 * Return: 0 on success, otherwise error 6950 */ 6951 static noinline int smb2_write_pipe(struct ksmbd_work *work) 6952 { 6953 struct smb2_write_req *req; 6954 struct smb2_write_rsp *rsp; 6955 struct ksmbd_rpc_command *rpc_resp; 6956 u64 id = 0; 6957 int err = 0, ret = 0; 6958 char *data_buf; 6959 size_t length; 6960 6961 WORK_BUFFERS(work, req, rsp); 6962 6963 length = le32_to_cpu(req->Length); 6964 id = req->VolatileFileId; 6965 6966 if ((u64)le16_to_cpu(req->DataOffset) + length > 6967 get_rfc1002_len(work->request_buf)) { 6968 pr_err("invalid write data offset %u, smb_len %u\n", 6969 le16_to_cpu(req->DataOffset), 6970 get_rfc1002_len(work->request_buf)); 6971 err = -EINVAL; 6972 goto out; 6973 } 6974 6975 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6976 le16_to_cpu(req->DataOffset)); 6977 6978 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6979 if (rpc_resp) { 6980 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6981 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6982 kvfree(rpc_resp); 6983 smb2_set_err_rsp(work); 6984 return -EOPNOTSUPP; 6985 } 6986 if (rpc_resp->flags != KSMBD_RPC_OK) { 6987 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6988 smb2_set_err_rsp(work); 6989 kvfree(rpc_resp); 6990 return ret; 6991 } 6992 kvfree(rpc_resp); 6993 } 6994 6995 rsp->StructureSize = cpu_to_le16(17); 6996 rsp->DataOffset = 0; 6997 rsp->Reserved = 0; 6998 rsp->DataLength = cpu_to_le32(length); 6999 rsp->DataRemaining = 0; 7000 rsp->Reserved2 = 0; 7001 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 7002 offsetof(struct smb2_write_rsp, Buffer)); 7003 out: 7004 if (err) { 7005 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7006 smb2_set_err_rsp(work); 7007 } 7008 7009 return err; 7010 } 7011 7012 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 7013 struct smb2_write_req *req, 7014 struct ksmbd_file *fp, 7015 loff_t offset, size_t length, bool sync) 7016 { 7017 char *data_buf; 7018 int ret; 7019 ssize_t nbytes; 7020 7021 data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP); 7022 if (!data_buf) 7023 return -ENOMEM; 7024 7025 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 7026 (struct smbdirect_buffer_descriptor_v1 *) 7027 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 7028 le16_to_cpu(req->WriteChannelInfoLength)); 7029 if (ret < 0) { 7030 kvfree(data_buf); 7031 return ret; 7032 } 7033 7034 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 7035 kvfree(data_buf); 7036 if (ret < 0) 7037 return ret; 7038 7039 return nbytes; 7040 } 7041 7042 /** 7043 * smb2_write() - handler for smb2 write from file 7044 * @work: smb work containing write command buffer 7045 * 7046 * Return: 0 on success, otherwise error 7047 */ 7048 int smb2_write(struct ksmbd_work *work) 7049 { 7050 struct smb2_write_req *req; 7051 struct smb2_write_rsp *rsp; 7052 struct ksmbd_file *fp = NULL; 7053 loff_t offset; 7054 size_t length; 7055 ssize_t nbytes; 7056 char *data_buf; 7057 bool writethrough = false, is_rdma_channel = false; 7058 int err = 0; 7059 unsigned int max_write_size = work->conn->vals->max_write_size; 7060 7061 ksmbd_debug(SMB, "Received smb2 write request\n"); 7062 7063 WORK_BUFFERS(work, req, rsp); 7064 7065 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 7066 ksmbd_debug(SMB, "IPC pipe write request\n"); 7067 return smb2_write_pipe(work); 7068 } 7069 7070 offset = le64_to_cpu(req->Offset); 7071 if (offset < 0) 7072 return -EINVAL; 7073 length = le32_to_cpu(req->Length); 7074 7075 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 7076 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 7077 is_rdma_channel = true; 7078 max_write_size = get_smbd_max_read_write_size(work->conn->transport); 7079 if (max_write_size == 0) { 7080 err = -EINVAL; 7081 goto out; 7082 } 7083 length = le32_to_cpu(req->RemainingBytes); 7084 } 7085 7086 if (is_rdma_channel == true) { 7087 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 7088 7089 if (req->Length != 0 || req->DataOffset != 0 || 7090 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 7091 err = -EINVAL; 7092 goto out; 7093 } 7094 err = smb2_set_remote_key_for_rdma(work, 7095 (struct smbdirect_buffer_descriptor_v1 *) 7096 ((char *)req + ch_offset), 7097 req->Channel, 7098 req->WriteChannelInfoLength); 7099 if (err) 7100 goto out; 7101 } 7102 7103 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7104 ksmbd_debug(SMB, "User does not have write permission\n"); 7105 err = -EACCES; 7106 goto out; 7107 } 7108 7109 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7110 if (!fp) { 7111 err = -ENOENT; 7112 goto out; 7113 } 7114 7115 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 7116 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 7117 err = -EACCES; 7118 goto out; 7119 } 7120 7121 if (length > max_write_size) { 7122 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 7123 max_write_size); 7124 err = -EINVAL; 7125 goto out; 7126 } 7127 7128 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 7129 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 7130 writethrough = true; 7131 7132 if (is_rdma_channel == false) { 7133 if (le16_to_cpu(req->DataOffset) < 7134 offsetof(struct smb2_write_req, Buffer)) { 7135 err = -EINVAL; 7136 goto out; 7137 } 7138 7139 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7140 le16_to_cpu(req->DataOffset)); 7141 7142 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 7143 fp->filp, offset, length); 7144 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 7145 writethrough, &nbytes); 7146 if (err < 0) 7147 goto out; 7148 } else { 7149 /* read data from the client using rdma channel, and 7150 * write the data. 7151 */ 7152 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 7153 writethrough); 7154 if (nbytes < 0) { 7155 err = (int)nbytes; 7156 goto out; 7157 } 7158 } 7159 7160 rsp->StructureSize = cpu_to_le16(17); 7161 rsp->DataOffset = 0; 7162 rsp->Reserved = 0; 7163 rsp->DataLength = cpu_to_le32(nbytes); 7164 rsp->DataRemaining = 0; 7165 rsp->Reserved2 = 0; 7166 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 7167 if (err) 7168 goto out; 7169 ksmbd_fd_put(work, fp); 7170 return 0; 7171 7172 out: 7173 if (err == -EAGAIN) 7174 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7175 else if (err == -ENOSPC || err == -EFBIG) 7176 rsp->hdr.Status = STATUS_DISK_FULL; 7177 else if (err == -ENOENT) 7178 rsp->hdr.Status = STATUS_FILE_CLOSED; 7179 else if (err == -EACCES) 7180 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7181 else if (err == -ESHARE) 7182 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 7183 else if (err == -EINVAL) 7184 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7185 else 7186 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7187 7188 smb2_set_err_rsp(work); 7189 ksmbd_fd_put(work, fp); 7190 return err; 7191 } 7192 7193 /** 7194 * smb2_flush() - handler for smb2 flush file - fsync 7195 * @work: smb work containing flush command buffer 7196 * 7197 * Return: 0 on success, otherwise error 7198 */ 7199 int smb2_flush(struct ksmbd_work *work) 7200 { 7201 struct smb2_flush_req *req; 7202 struct smb2_flush_rsp *rsp; 7203 int err; 7204 7205 WORK_BUFFERS(work, req, rsp); 7206 7207 ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId); 7208 7209 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 7210 if (err) 7211 goto out; 7212 7213 rsp->StructureSize = cpu_to_le16(4); 7214 rsp->Reserved = 0; 7215 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 7216 7217 out: 7218 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7219 smb2_set_err_rsp(work); 7220 return err; 7221 } 7222 7223 /** 7224 * smb2_cancel() - handler for smb2 cancel command 7225 * @work: smb work containing cancel command buffer 7226 * 7227 * Return: 0 on success, otherwise error 7228 */ 7229 int smb2_cancel(struct ksmbd_work *work) 7230 { 7231 struct ksmbd_conn *conn = work->conn; 7232 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 7233 struct smb2_hdr *chdr; 7234 struct ksmbd_work *iter; 7235 struct list_head *command_list; 7236 7237 if (work->next_smb2_rcv_hdr_off) 7238 hdr = ksmbd_resp_buf_next(work); 7239 7240 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 7241 hdr->MessageId, hdr->Flags); 7242 7243 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 7244 command_list = &conn->async_requests; 7245 7246 spin_lock(&conn->request_lock); 7247 list_for_each_entry(iter, command_list, 7248 async_request_entry) { 7249 chdr = smb_get_msg(iter->request_buf); 7250 7251 if (iter->async_id != 7252 le64_to_cpu(hdr->Id.AsyncId)) 7253 continue; 7254 7255 ksmbd_debug(SMB, 7256 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 7257 le64_to_cpu(hdr->Id.AsyncId), 7258 le16_to_cpu(chdr->Command)); 7259 iter->state = KSMBD_WORK_CANCELLED; 7260 if (iter->cancel_fn) 7261 iter->cancel_fn(iter->cancel_argv); 7262 break; 7263 } 7264 spin_unlock(&conn->request_lock); 7265 } else { 7266 command_list = &conn->requests; 7267 7268 spin_lock(&conn->request_lock); 7269 list_for_each_entry(iter, command_list, request_entry) { 7270 chdr = smb_get_msg(iter->request_buf); 7271 7272 if (chdr->MessageId != hdr->MessageId || 7273 iter == work) 7274 continue; 7275 7276 ksmbd_debug(SMB, 7277 "smb2 with mid %llu cancelled command = 0x%x\n", 7278 le64_to_cpu(hdr->MessageId), 7279 le16_to_cpu(chdr->Command)); 7280 iter->state = KSMBD_WORK_CANCELLED; 7281 break; 7282 } 7283 spin_unlock(&conn->request_lock); 7284 } 7285 7286 /* For SMB2_CANCEL command itself send no response*/ 7287 work->send_no_response = 1; 7288 return 0; 7289 } 7290 7291 struct file_lock *smb_flock_init(struct file *f) 7292 { 7293 struct file_lock *fl; 7294 7295 fl = locks_alloc_lock(); 7296 if (!fl) 7297 goto out; 7298 7299 locks_init_lock(fl); 7300 7301 fl->c.flc_owner = f; 7302 fl->c.flc_pid = current->tgid; 7303 fl->c.flc_file = f; 7304 fl->c.flc_flags = FL_POSIX; 7305 fl->fl_ops = NULL; 7306 fl->fl_lmops = NULL; 7307 7308 out: 7309 return fl; 7310 } 7311 7312 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 7313 { 7314 int cmd = -EINVAL; 7315 7316 /* Checking for wrong flag combination during lock request*/ 7317 switch (flags) { 7318 case SMB2_LOCKFLAG_SHARED: 7319 ksmbd_debug(SMB, "received shared request\n"); 7320 cmd = F_SETLKW; 7321 flock->c.flc_type = F_RDLCK; 7322 flock->c.flc_flags |= FL_SLEEP; 7323 break; 7324 case SMB2_LOCKFLAG_EXCLUSIVE: 7325 ksmbd_debug(SMB, "received exclusive request\n"); 7326 cmd = F_SETLKW; 7327 flock->c.flc_type = F_WRLCK; 7328 flock->c.flc_flags |= FL_SLEEP; 7329 break; 7330 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7331 ksmbd_debug(SMB, 7332 "received shared & fail immediately request\n"); 7333 cmd = F_SETLK; 7334 flock->c.flc_type = F_RDLCK; 7335 break; 7336 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7337 ksmbd_debug(SMB, 7338 "received exclusive & fail immediately request\n"); 7339 cmd = F_SETLK; 7340 flock->c.flc_type = F_WRLCK; 7341 break; 7342 case SMB2_LOCKFLAG_UNLOCK: 7343 ksmbd_debug(SMB, "received unlock request\n"); 7344 flock->c.flc_type = F_UNLCK; 7345 cmd = F_SETLK; 7346 break; 7347 } 7348 7349 return cmd; 7350 } 7351 7352 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 7353 unsigned int cmd, int flags, 7354 struct list_head *lock_list) 7355 { 7356 struct ksmbd_lock *lock; 7357 7358 lock = kzalloc_obj(struct ksmbd_lock, KSMBD_DEFAULT_GFP); 7359 if (!lock) 7360 return NULL; 7361 7362 lock->cmd = cmd; 7363 lock->fl = flock; 7364 lock->start = flock->fl_start; 7365 lock->end = flock->fl_end; 7366 lock->flags = flags; 7367 if (lock->start == lock->end) 7368 lock->zero_len = 1; 7369 INIT_LIST_HEAD(&lock->clist); 7370 INIT_LIST_HEAD(&lock->flist); 7371 INIT_LIST_HEAD(&lock->llist); 7372 list_add_tail(&lock->llist, lock_list); 7373 7374 return lock; 7375 } 7376 7377 static void smb2_remove_blocked_lock(void **argv) 7378 { 7379 struct file_lock *flock = (struct file_lock *)argv[0]; 7380 7381 ksmbd_vfs_posix_lock_unblock(flock); 7382 locks_wake_up(flock); 7383 } 7384 7385 static inline bool lock_defer_pending(struct file_lock *fl) 7386 { 7387 /* check pending lock waiters */ 7388 return waitqueue_active(&fl->c.flc_wait); 7389 } 7390 7391 /** 7392 * smb2_lock() - handler for smb2 file lock command 7393 * @work: smb work containing lock command buffer 7394 * 7395 * Return: 0 on success, otherwise error 7396 */ 7397 int smb2_lock(struct ksmbd_work *work) 7398 { 7399 struct smb2_lock_req *req; 7400 struct smb2_lock_rsp *rsp; 7401 struct smb2_lock_element *lock_ele; 7402 struct ksmbd_file *fp = NULL; 7403 struct file_lock *flock = NULL; 7404 struct file *filp = NULL; 7405 int lock_count; 7406 int flags = 0; 7407 int cmd = 0; 7408 int err = -EIO, i, rc = 0; 7409 u64 lock_start, lock_length; 7410 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 7411 struct ksmbd_conn *conn; 7412 int nolock = 0; 7413 LIST_HEAD(lock_list); 7414 LIST_HEAD(rollback_list); 7415 int prior_lock = 0, bkt; 7416 7417 WORK_BUFFERS(work, req, rsp); 7418 7419 ksmbd_debug(SMB, "Received smb2 lock request\n"); 7420 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7421 if (!fp) { 7422 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 7423 err = -ENOENT; 7424 goto out2; 7425 } 7426 7427 filp = fp->filp; 7428 lock_count = le16_to_cpu(req->LockCount); 7429 lock_ele = req->locks; 7430 7431 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 7432 if (!lock_count) { 7433 err = -EINVAL; 7434 goto out2; 7435 } 7436 7437 for (i = 0; i < lock_count; i++) { 7438 flags = le32_to_cpu(lock_ele[i].Flags); 7439 7440 flock = smb_flock_init(filp); 7441 if (!flock) 7442 goto out; 7443 7444 cmd = smb2_set_flock_flags(flock, flags); 7445 7446 lock_start = le64_to_cpu(lock_ele[i].Offset); 7447 lock_length = le64_to_cpu(lock_ele[i].Length); 7448 if (lock_start > U64_MAX - lock_length) { 7449 pr_err("Invalid lock range requested\n"); 7450 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7451 locks_free_lock(flock); 7452 goto out; 7453 } 7454 7455 if (lock_start > OFFSET_MAX) 7456 flock->fl_start = OFFSET_MAX; 7457 else 7458 flock->fl_start = lock_start; 7459 7460 lock_length = le64_to_cpu(lock_ele[i].Length); 7461 if (lock_length > OFFSET_MAX - flock->fl_start) 7462 lock_length = OFFSET_MAX - flock->fl_start; 7463 7464 flock->fl_end = flock->fl_start + lock_length; 7465 7466 if (flock->fl_end < flock->fl_start) { 7467 ksmbd_debug(SMB, 7468 "the end offset(%llx) is smaller than the start offset(%llx)\n", 7469 flock->fl_end, flock->fl_start); 7470 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7471 locks_free_lock(flock); 7472 goto out; 7473 } 7474 7475 /* Check conflict locks in one request */ 7476 list_for_each_entry(cmp_lock, &lock_list, llist) { 7477 if (cmp_lock->fl->fl_start <= flock->fl_start && 7478 cmp_lock->fl->fl_end >= flock->fl_end) { 7479 if (cmp_lock->fl->c.flc_type != F_UNLCK && 7480 flock->c.flc_type != F_UNLCK) { 7481 pr_err("conflict two locks in one request\n"); 7482 err = -EINVAL; 7483 locks_free_lock(flock); 7484 goto out; 7485 } 7486 } 7487 } 7488 7489 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 7490 if (!smb_lock) { 7491 err = -EINVAL; 7492 locks_free_lock(flock); 7493 goto out; 7494 } 7495 } 7496 7497 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7498 if (smb_lock->cmd < 0) { 7499 err = -EINVAL; 7500 goto out; 7501 } 7502 7503 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 7504 err = -EINVAL; 7505 goto out; 7506 } 7507 7508 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 7509 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 7510 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 7511 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 7512 err = -EINVAL; 7513 goto out; 7514 } 7515 7516 prior_lock = smb_lock->flags; 7517 7518 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 7519 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 7520 goto no_check_cl; 7521 7522 nolock = 1; 7523 /* check locks in connection list */ 7524 down_read(&conn_list_lock); 7525 hash_for_each(conn_list, bkt, conn, hlist) { 7526 spin_lock(&conn->llist_lock); 7527 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 7528 if (file_inode(cmp_lock->fl->c.flc_file) != 7529 file_inode(smb_lock->fl->c.flc_file)) 7530 continue; 7531 7532 if (lock_is_unlock(smb_lock->fl)) { 7533 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && 7534 cmp_lock->start == smb_lock->start && 7535 cmp_lock->end == smb_lock->end && 7536 !lock_defer_pending(cmp_lock->fl)) { 7537 nolock = 0; 7538 list_del(&cmp_lock->flist); 7539 list_del(&cmp_lock->clist); 7540 spin_unlock(&conn->llist_lock); 7541 up_read(&conn_list_lock); 7542 7543 locks_free_lock(cmp_lock->fl); 7544 kfree(cmp_lock); 7545 goto out_check_cl; 7546 } 7547 continue; 7548 } 7549 7550 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { 7551 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7552 continue; 7553 } else { 7554 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7555 continue; 7556 } 7557 7558 /* check zero byte lock range */ 7559 if (cmp_lock->zero_len && !smb_lock->zero_len && 7560 cmp_lock->start > smb_lock->start && 7561 cmp_lock->start < smb_lock->end) { 7562 spin_unlock(&conn->llist_lock); 7563 up_read(&conn_list_lock); 7564 pr_err("previous lock conflict with zero byte lock range\n"); 7565 goto out; 7566 } 7567 7568 if (smb_lock->zero_len && !cmp_lock->zero_len && 7569 smb_lock->start > cmp_lock->start && 7570 smb_lock->start < cmp_lock->end) { 7571 spin_unlock(&conn->llist_lock); 7572 up_read(&conn_list_lock); 7573 pr_err("current lock conflict with zero byte lock range\n"); 7574 goto out; 7575 } 7576 7577 if (((cmp_lock->start <= smb_lock->start && 7578 cmp_lock->end > smb_lock->start) || 7579 (cmp_lock->start < smb_lock->end && 7580 cmp_lock->end >= smb_lock->end)) && 7581 !cmp_lock->zero_len && !smb_lock->zero_len) { 7582 spin_unlock(&conn->llist_lock); 7583 up_read(&conn_list_lock); 7584 pr_err("Not allow lock operation on exclusive lock range\n"); 7585 goto out; 7586 } 7587 } 7588 spin_unlock(&conn->llist_lock); 7589 } 7590 up_read(&conn_list_lock); 7591 out_check_cl: 7592 if (lock_is_unlock(smb_lock->fl) && nolock) { 7593 pr_err("Try to unlock nolocked range\n"); 7594 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7595 goto out; 7596 } 7597 7598 no_check_cl: 7599 flock = smb_lock->fl; 7600 list_del(&smb_lock->llist); 7601 7602 if (smb_lock->zero_len) { 7603 err = 0; 7604 goto skip; 7605 } 7606 retry: 7607 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7608 skip: 7609 if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) { 7610 locks_free_lock(flock); 7611 kfree(smb_lock); 7612 if (!rc) { 7613 ksmbd_debug(SMB, "File unlocked\n"); 7614 } else if (rc == -ENOENT) { 7615 rsp->hdr.Status = STATUS_NOT_LOCKED; 7616 err = rc; 7617 goto out; 7618 } 7619 } else { 7620 if (rc == FILE_LOCK_DEFERRED) { 7621 void **argv; 7622 7623 ksmbd_debug(SMB, 7624 "would have to wait for getting lock\n"); 7625 list_add(&smb_lock->llist, &rollback_list); 7626 7627 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP); 7628 if (!argv) { 7629 err = -ENOMEM; 7630 goto out; 7631 } 7632 argv[0] = flock; 7633 7634 rc = setup_async_work(work, 7635 smb2_remove_blocked_lock, 7636 argv); 7637 if (rc) { 7638 kfree(argv); 7639 err = -ENOMEM; 7640 goto out; 7641 } 7642 spin_lock(&fp->f_lock); 7643 list_add(&work->fp_entry, &fp->blocked_works); 7644 spin_unlock(&fp->f_lock); 7645 7646 smb2_send_interim_resp(work, STATUS_PENDING); 7647 7648 ksmbd_vfs_posix_lock_wait(flock); 7649 7650 spin_lock(&fp->f_lock); 7651 list_del(&work->fp_entry); 7652 spin_unlock(&fp->f_lock); 7653 7654 if (work->state != KSMBD_WORK_ACTIVE) { 7655 list_del(&smb_lock->llist); 7656 locks_free_lock(flock); 7657 7658 if (work->state == KSMBD_WORK_CANCELLED) { 7659 rsp->hdr.Status = 7660 STATUS_CANCELLED; 7661 kfree(smb_lock); 7662 smb2_send_interim_resp(work, 7663 STATUS_CANCELLED); 7664 work->send_no_response = 1; 7665 goto out; 7666 } 7667 7668 rsp->hdr.Status = 7669 STATUS_RANGE_NOT_LOCKED; 7670 kfree(smb_lock); 7671 goto out2; 7672 } 7673 7674 list_del(&smb_lock->llist); 7675 release_async_work(work); 7676 goto retry; 7677 } else if (!rc) { 7678 list_add(&smb_lock->llist, &rollback_list); 7679 spin_lock(&work->conn->llist_lock); 7680 list_add_tail(&smb_lock->clist, 7681 &work->conn->lock_list); 7682 list_add_tail(&smb_lock->flist, 7683 &fp->lock_list); 7684 spin_unlock(&work->conn->llist_lock); 7685 ksmbd_debug(SMB, "successful in taking lock\n"); 7686 } else { 7687 locks_free_lock(flock); 7688 kfree(smb_lock); 7689 err = rc; 7690 goto out; 7691 } 7692 } 7693 } 7694 7695 if (atomic_read(&fp->f_ci->op_count) > 1) 7696 smb_break_all_oplock(work, fp); 7697 7698 rsp->StructureSize = cpu_to_le16(4); 7699 ksmbd_debug(SMB, "successful in taking lock\n"); 7700 rsp->hdr.Status = STATUS_SUCCESS; 7701 rsp->Reserved = 0; 7702 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7703 if (err) 7704 goto out; 7705 7706 ksmbd_fd_put(work, fp); 7707 return 0; 7708 7709 out: 7710 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7711 locks_free_lock(smb_lock->fl); 7712 list_del(&smb_lock->llist); 7713 kfree(smb_lock); 7714 } 7715 7716 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7717 struct file_lock *rlock = NULL; 7718 7719 rlock = smb_flock_init(filp); 7720 if (rlock) { 7721 rlock->c.flc_type = F_UNLCK; 7722 rlock->fl_start = smb_lock->start; 7723 rlock->fl_end = smb_lock->end; 7724 7725 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7726 if (rc) 7727 pr_err("rollback unlock fail : %d\n", rc); 7728 } else { 7729 pr_err("rollback unlock alloc failed\n"); 7730 } 7731 7732 list_del(&smb_lock->llist); 7733 spin_lock(&work->conn->llist_lock); 7734 if (!list_empty(&smb_lock->flist)) 7735 list_del(&smb_lock->flist); 7736 list_del(&smb_lock->clist); 7737 spin_unlock(&work->conn->llist_lock); 7738 7739 locks_free_lock(smb_lock->fl); 7740 if (rlock) 7741 locks_free_lock(rlock); 7742 kfree(smb_lock); 7743 } 7744 out2: 7745 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7746 7747 if (!rsp->hdr.Status) { 7748 if (err == -EINVAL) 7749 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7750 else if (err == -ENOMEM) 7751 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7752 else if (err == -ENOENT) 7753 rsp->hdr.Status = STATUS_FILE_CLOSED; 7754 else 7755 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7756 } 7757 7758 smb2_set_err_rsp(work); 7759 ksmbd_fd_put(work, fp); 7760 return err; 7761 } 7762 7763 static int fsctl_copychunk(struct ksmbd_work *work, 7764 struct copychunk_ioctl_req *ci_req, 7765 unsigned int cnt_code, 7766 unsigned int input_count, 7767 unsigned long long volatile_id, 7768 unsigned long long persistent_id, 7769 struct smb2_ioctl_rsp *rsp) 7770 { 7771 struct copychunk_ioctl_rsp *ci_rsp; 7772 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7773 struct srv_copychunk *chunks; 7774 unsigned int i, chunk_count, chunk_count_written = 0; 7775 unsigned int chunk_size_written = 0; 7776 loff_t total_size_written = 0; 7777 int ret = 0; 7778 7779 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7780 7781 rsp->VolatileFileId = volatile_id; 7782 rsp->PersistentFileId = persistent_id; 7783 ci_rsp->ChunksWritten = 7784 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7785 ci_rsp->ChunkBytesWritten = 7786 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7787 ci_rsp->TotalBytesWritten = 7788 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7789 7790 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7791 if (chunk_count == 0) 7792 goto out; 7793 total_size_written = 0; 7794 7795 /* verify the SRV_COPYCHUNK_COPY packet */ 7796 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7797 input_count < struct_size(ci_req, Chunks, chunk_count)) { 7798 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7799 return -EINVAL; 7800 } 7801 7802 chunks = &ci_req->Chunks[0]; 7803 for (i = 0; i < chunk_count; i++) { 7804 if (le32_to_cpu(chunks[i].Length) == 0 || 7805 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7806 break; 7807 total_size_written += le32_to_cpu(chunks[i].Length); 7808 } 7809 7810 if (i < chunk_count || 7811 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7812 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7813 return -EINVAL; 7814 } 7815 7816 src_fp = ksmbd_lookup_foreign_fd(work, 7817 le64_to_cpu(ci_req->SourceKeyU64[0])); 7818 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7819 ret = -EINVAL; 7820 if (!src_fp || 7821 src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) { 7822 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7823 goto out; 7824 } 7825 7826 if (!dst_fp) { 7827 rsp->hdr.Status = STATUS_FILE_CLOSED; 7828 goto out; 7829 } 7830 7831 /* 7832 * FILE_READ_DATA should only be included in 7833 * the FSCTL_COPYCHUNK case 7834 */ 7835 if (cnt_code == FSCTL_COPYCHUNK && 7836 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7837 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7838 goto out; 7839 } 7840 7841 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7842 chunks, chunk_count, 7843 &chunk_count_written, 7844 &chunk_size_written, 7845 &total_size_written); 7846 if (ret < 0) { 7847 if (ret == -EACCES) 7848 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7849 if (ret == -EAGAIN) 7850 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7851 else if (ret == -EBADF) 7852 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7853 else if (ret == -EFBIG || ret == -ENOSPC) 7854 rsp->hdr.Status = STATUS_DISK_FULL; 7855 else if (ret == -EINVAL) 7856 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7857 else if (ret == -EISDIR) 7858 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7859 else if (ret == -E2BIG) 7860 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7861 else 7862 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7863 } 7864 7865 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7866 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7867 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7868 out: 7869 ksmbd_fd_put(work, src_fp); 7870 ksmbd_fd_put(work, dst_fp); 7871 return ret; 7872 } 7873 7874 static __be32 idev_ipv4_address(struct in_device *idev) 7875 { 7876 __be32 addr = 0; 7877 7878 struct in_ifaddr *ifa; 7879 7880 rcu_read_lock(); 7881 in_dev_for_each_ifa_rcu(ifa, idev) { 7882 if (ifa->ifa_flags & IFA_F_SECONDARY) 7883 continue; 7884 7885 addr = ifa->ifa_address; 7886 break; 7887 } 7888 rcu_read_unlock(); 7889 return addr; 7890 } 7891 7892 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7893 struct smb2_ioctl_rsp *rsp, 7894 unsigned int out_buf_len) 7895 { 7896 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7897 int nbytes = 0; 7898 struct net_device *netdev; 7899 struct sockaddr_storage_rsp *sockaddr_storage; 7900 unsigned int flags; 7901 unsigned long long speed; 7902 7903 rtnl_lock(); 7904 for_each_netdev(&init_net, netdev) { 7905 bool ipv4_set = false; 7906 7907 if (netdev->type == ARPHRD_LOOPBACK) 7908 continue; 7909 7910 if (!ksmbd_find_netdev_name_iface_list(netdev->name)) 7911 continue; 7912 7913 flags = netif_get_flags(netdev); 7914 if (!(flags & IFF_RUNNING)) 7915 continue; 7916 ipv6_retry: 7917 if (out_buf_len < 7918 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7919 rtnl_unlock(); 7920 return -ENOSPC; 7921 } 7922 7923 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7924 &rsp->Buffer[nbytes]; 7925 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7926 7927 nii_rsp->Capability = 0; 7928 if (netdev->real_num_tx_queues > 1) 7929 nii_rsp->Capability |= RSS_CAPABLE; 7930 if (ksmbd_rdma_capable_netdev(netdev)) 7931 nii_rsp->Capability |= RDMA_CAPABLE; 7932 7933 nii_rsp->Next = cpu_to_le32(152); 7934 nii_rsp->Reserved = 0; 7935 7936 if (netdev->ethtool_ops->get_link_ksettings) { 7937 struct ethtool_link_ksettings cmd; 7938 7939 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7940 speed = cmd.base.speed; 7941 } else { 7942 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7943 "speed is unknown, defaulting to 1Gb/sec"); 7944 speed = SPEED_1000; 7945 } 7946 7947 speed *= 1000000; 7948 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7949 7950 sockaddr_storage = (struct sockaddr_storage_rsp *) 7951 nii_rsp->SockAddr_Storage; 7952 memset(sockaddr_storage, 0, 128); 7953 7954 if (!ipv4_set) { 7955 struct in_device *idev; 7956 7957 sockaddr_storage->Family = INTERNETWORK; 7958 sockaddr_storage->addr4.Port = 0; 7959 7960 idev = __in_dev_get_rtnl(netdev); 7961 if (!idev) 7962 continue; 7963 sockaddr_storage->addr4.IPv4Address = 7964 idev_ipv4_address(idev); 7965 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7966 ipv4_set = true; 7967 goto ipv6_retry; 7968 } else { 7969 struct inet6_dev *idev6; 7970 struct inet6_ifaddr *ifa; 7971 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6Address; 7972 7973 sockaddr_storage->Family = INTERNETWORKV6; 7974 sockaddr_storage->addr6.Port = 0; 7975 sockaddr_storage->addr6.FlowInfo = 0; 7976 7977 idev6 = __in6_dev_get(netdev); 7978 if (!idev6) 7979 continue; 7980 7981 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7982 if (ifa->flags & (IFA_F_TENTATIVE | 7983 IFA_F_DEPRECATED)) 7984 continue; 7985 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7986 break; 7987 } 7988 sockaddr_storage->addr6.ScopeId = 0; 7989 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7990 } 7991 } 7992 rtnl_unlock(); 7993 7994 /* zero if this is last one */ 7995 if (nii_rsp) 7996 nii_rsp->Next = 0; 7997 7998 rsp->PersistentFileId = SMB2_NO_FID; 7999 rsp->VolatileFileId = SMB2_NO_FID; 8000 return nbytes; 8001 } 8002 8003 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 8004 struct validate_negotiate_info_req *neg_req, 8005 struct validate_negotiate_info_rsp *neg_rsp, 8006 unsigned int in_buf_len) 8007 { 8008 int ret = 0; 8009 int dialect; 8010 8011 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 8012 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 8013 return -EINVAL; 8014 8015 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 8016 neg_req->DialectCount); 8017 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 8018 ret = -EINVAL; 8019 goto err_out; 8020 } 8021 8022 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 8023 ret = -EINVAL; 8024 goto err_out; 8025 } 8026 8027 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 8028 ret = -EINVAL; 8029 goto err_out; 8030 } 8031 8032 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 8033 ret = -EINVAL; 8034 goto err_out; 8035 } 8036 8037 neg_rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 8038 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 8039 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 8040 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 8041 err_out: 8042 return ret; 8043 } 8044 8045 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 8046 struct file_allocated_range_buffer *qar_req, 8047 struct file_allocated_range_buffer *qar_rsp, 8048 unsigned int in_count, unsigned int *out_count) 8049 { 8050 struct ksmbd_file *fp; 8051 loff_t start, length; 8052 int ret = 0; 8053 8054 *out_count = 0; 8055 if (in_count == 0) 8056 return -EINVAL; 8057 8058 start = le64_to_cpu(qar_req->file_offset); 8059 length = le64_to_cpu(qar_req->length); 8060 8061 if (start < 0 || length < 0) 8062 return -EINVAL; 8063 8064 fp = ksmbd_lookup_fd_fast(work, id); 8065 if (!fp) 8066 return -ENOENT; 8067 8068 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 8069 qar_rsp, in_count, out_count); 8070 if (ret && ret != -E2BIG) 8071 *out_count = 0; 8072 8073 ksmbd_fd_put(work, fp); 8074 return ret; 8075 } 8076 8077 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 8078 unsigned int out_buf_len, 8079 struct smb2_ioctl_req *req, 8080 struct smb2_ioctl_rsp *rsp) 8081 { 8082 struct ksmbd_rpc_command *rpc_resp; 8083 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); 8084 int nbytes = 0; 8085 8086 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 8087 le32_to_cpu(req->InputCount)); 8088 if (rpc_resp) { 8089 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 8090 /* 8091 * set STATUS_SOME_NOT_MAPPED response 8092 * for unknown domain sid. 8093 */ 8094 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 8095 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 8096 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8097 goto out; 8098 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 8099 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8100 goto out; 8101 } 8102 8103 nbytes = rpc_resp->payload_sz; 8104 if (rpc_resp->payload_sz > out_buf_len) { 8105 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8106 nbytes = out_buf_len; 8107 } 8108 8109 if (!rpc_resp->payload_sz) { 8110 rsp->hdr.Status = 8111 STATUS_UNEXPECTED_IO_ERROR; 8112 goto out; 8113 } 8114 8115 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 8116 } 8117 out: 8118 kvfree(rpc_resp); 8119 return nbytes; 8120 } 8121 8122 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 8123 struct file_sparse *sparse) 8124 { 8125 struct ksmbd_file *fp; 8126 struct mnt_idmap *idmap; 8127 int ret = 0; 8128 __le32 old_fattr; 8129 8130 fp = ksmbd_lookup_fd_fast(work, id); 8131 if (!fp) 8132 return -ENOENT; 8133 idmap = file_mnt_idmap(fp->filp); 8134 8135 old_fattr = fp->f_ci->m_fattr; 8136 if (sparse->SetSparse) 8137 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 8138 else 8139 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 8140 8141 if (fp->f_ci->m_fattr != old_fattr && 8142 test_share_config_flag(work->tcon->share_conf, 8143 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 8144 struct xattr_dos_attrib da; 8145 8146 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 8147 fp->filp->f_path.dentry, &da); 8148 if (ret <= 0) 8149 goto out; 8150 8151 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 8152 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 8153 &fp->filp->f_path, 8154 &da, true); 8155 if (ret) 8156 fp->f_ci->m_fattr = old_fattr; 8157 } 8158 8159 out: 8160 ksmbd_fd_put(work, fp); 8161 return ret; 8162 } 8163 8164 static int fsctl_request_resume_key(struct ksmbd_work *work, 8165 struct smb2_ioctl_req *req, 8166 struct resume_key_ioctl_rsp *key_rsp) 8167 { 8168 struct ksmbd_file *fp; 8169 8170 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 8171 if (!fp) 8172 return -ENOENT; 8173 8174 memset(key_rsp, 0, sizeof(*key_rsp)); 8175 key_rsp->ResumeKeyU64[0] = req->VolatileFileId; 8176 key_rsp->ResumeKeyU64[1] = req->PersistentFileId; 8177 ksmbd_fd_put(work, fp); 8178 8179 return 0; 8180 } 8181 8182 /** 8183 * smb2_ioctl() - handler for smb2 ioctl command 8184 * @work: smb work containing ioctl command buffer 8185 * 8186 * Return: 0 on success, otherwise error 8187 */ 8188 int smb2_ioctl(struct ksmbd_work *work) 8189 { 8190 struct smb2_ioctl_req *req; 8191 struct smb2_ioctl_rsp *rsp; 8192 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 8193 u64 id = KSMBD_NO_FID; 8194 struct ksmbd_conn *conn = work->conn; 8195 int ret = 0; 8196 char *buffer; 8197 8198 ksmbd_debug(SMB, "Received smb2 ioctl request\n"); 8199 8200 if (work->next_smb2_rcv_hdr_off) { 8201 req = ksmbd_req_buf_next(work); 8202 rsp = ksmbd_resp_buf_next(work); 8203 if (!has_file_id(req->VolatileFileId)) { 8204 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 8205 work->compound_fid); 8206 id = work->compound_fid; 8207 } 8208 } else { 8209 req = smb_get_msg(work->request_buf); 8210 rsp = smb_get_msg(work->response_buf); 8211 } 8212 8213 if (!has_file_id(id)) 8214 id = req->VolatileFileId; 8215 8216 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 8217 ret = -EOPNOTSUPP; 8218 goto out; 8219 } 8220 8221 buffer = (char *)req + le32_to_cpu(req->InputOffset); 8222 8223 cnt_code = le32_to_cpu(req->CtlCode); 8224 ret = smb2_calc_max_out_buf_len(work, 8225 offsetof(struct smb2_ioctl_rsp, Buffer), 8226 le32_to_cpu(req->MaxOutputResponse)); 8227 if (ret < 0) { 8228 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8229 goto out; 8230 } 8231 out_buf_len = (unsigned int)ret; 8232 in_buf_len = le32_to_cpu(req->InputCount); 8233 8234 switch (cnt_code) { 8235 case FSCTL_DFS_GET_REFERRALS: 8236 case FSCTL_DFS_GET_REFERRALS_EX: 8237 /* Not support DFS yet */ 8238 ret = -EOPNOTSUPP; 8239 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 8240 goto out2; 8241 case FSCTL_CREATE_OR_GET_OBJECT_ID: 8242 { 8243 struct file_object_buf_type1_ioctl_rsp *obj_buf; 8244 8245 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 8246 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 8247 &rsp->Buffer[0]; 8248 8249 /* 8250 * TODO: This is dummy implementation to pass smbtorture 8251 * Need to check correct response later 8252 */ 8253 memset(obj_buf->ObjectId, 0x0, 16); 8254 memset(obj_buf->BirthVolumeId, 0x0, 16); 8255 memset(obj_buf->BirthObjectId, 0x0, 16); 8256 memset(obj_buf->DomainId, 0x0, 16); 8257 8258 break; 8259 } 8260 case FSCTL_PIPE_TRANSCEIVE: 8261 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 8262 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 8263 break; 8264 case FSCTL_VALIDATE_NEGOTIATE_INFO: 8265 if (conn->dialect < SMB30_PROT_ID) { 8266 ret = -EOPNOTSUPP; 8267 goto out; 8268 } 8269 8270 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 8271 Dialects)) { 8272 ret = -EINVAL; 8273 goto out; 8274 } 8275 8276 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 8277 ret = -EINVAL; 8278 goto out; 8279 } 8280 8281 ret = fsctl_validate_negotiate_info(conn, 8282 (struct validate_negotiate_info_req *)buffer, 8283 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 8284 in_buf_len); 8285 if (ret < 0) 8286 goto out; 8287 8288 nbytes = sizeof(struct validate_negotiate_info_rsp); 8289 rsp->PersistentFileId = SMB2_NO_FID; 8290 rsp->VolatileFileId = SMB2_NO_FID; 8291 break; 8292 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 8293 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 8294 if (ret < 0) 8295 goto out; 8296 nbytes = ret; 8297 break; 8298 case FSCTL_REQUEST_RESUME_KEY: 8299 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 8300 ret = -EINVAL; 8301 goto out; 8302 } 8303 8304 ret = fsctl_request_resume_key(work, req, 8305 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 8306 if (ret < 0) 8307 goto out; 8308 rsp->PersistentFileId = req->PersistentFileId; 8309 rsp->VolatileFileId = req->VolatileFileId; 8310 nbytes = sizeof(struct resume_key_ioctl_rsp); 8311 break; 8312 case FSCTL_COPYCHUNK: 8313 case FSCTL_COPYCHUNK_WRITE: 8314 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8315 ksmbd_debug(SMB, 8316 "User does not have write permission\n"); 8317 ret = -EACCES; 8318 goto out; 8319 } 8320 8321 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) { 8322 ret = -EINVAL; 8323 goto out; 8324 } 8325 8326 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 8327 ret = -EINVAL; 8328 goto out; 8329 } 8330 8331 nbytes = sizeof(struct copychunk_ioctl_rsp); 8332 rsp->VolatileFileId = req->VolatileFileId; 8333 rsp->PersistentFileId = req->PersistentFileId; 8334 fsctl_copychunk(work, 8335 (struct copychunk_ioctl_req *)buffer, 8336 le32_to_cpu(req->CtlCode), 8337 le32_to_cpu(req->InputCount), 8338 req->VolatileFileId, 8339 req->PersistentFileId, 8340 rsp); 8341 break; 8342 case FSCTL_SET_SPARSE: 8343 if (in_buf_len < sizeof(struct file_sparse)) { 8344 ret = -EINVAL; 8345 goto out; 8346 } 8347 8348 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); 8349 if (ret < 0) 8350 goto out; 8351 break; 8352 case FSCTL_SET_ZERO_DATA: 8353 { 8354 struct file_zero_data_information *zero_data; 8355 struct ksmbd_file *fp; 8356 loff_t off, len, bfz; 8357 8358 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8359 ksmbd_debug(SMB, 8360 "User does not have write permission\n"); 8361 ret = -EACCES; 8362 goto out; 8363 } 8364 8365 if (in_buf_len < sizeof(struct file_zero_data_information)) { 8366 ret = -EINVAL; 8367 goto out; 8368 } 8369 8370 zero_data = 8371 (struct file_zero_data_information *)buffer; 8372 8373 off = le64_to_cpu(zero_data->FileOffset); 8374 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 8375 if (off < 0 || bfz < 0 || off > bfz) { 8376 ret = -EINVAL; 8377 goto out; 8378 } 8379 8380 len = bfz - off; 8381 if (len) { 8382 fp = ksmbd_lookup_fd_fast(work, id); 8383 if (!fp) { 8384 ret = -ENOENT; 8385 goto out; 8386 } 8387 8388 ret = ksmbd_vfs_zero_data(work, fp, off, len); 8389 ksmbd_fd_put(work, fp); 8390 if (ret < 0) 8391 goto out; 8392 } 8393 break; 8394 } 8395 case FSCTL_QUERY_ALLOCATED_RANGES: 8396 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 8397 ret = -EINVAL; 8398 goto out; 8399 } 8400 8401 ret = fsctl_query_allocated_ranges(work, id, 8402 (struct file_allocated_range_buffer *)buffer, 8403 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 8404 out_buf_len / 8405 sizeof(struct file_allocated_range_buffer), &nbytes); 8406 if (ret == -E2BIG) { 8407 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8408 } else if (ret < 0) { 8409 nbytes = 0; 8410 goto out; 8411 } 8412 8413 nbytes *= sizeof(struct file_allocated_range_buffer); 8414 break; 8415 case FSCTL_GET_REPARSE_POINT: 8416 { 8417 struct reparse_data_buffer *reparse_ptr; 8418 struct ksmbd_file *fp; 8419 8420 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 8421 fp = ksmbd_lookup_fd_fast(work, id); 8422 if (!fp) { 8423 pr_err("not found fp!!\n"); 8424 ret = -ENOENT; 8425 goto out; 8426 } 8427 8428 reparse_ptr->ReparseTag = 8429 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 8430 reparse_ptr->ReparseDataLength = 0; 8431 ksmbd_fd_put(work, fp); 8432 nbytes = sizeof(struct reparse_data_buffer); 8433 break; 8434 } 8435 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 8436 { 8437 struct ksmbd_file *fp_in, *fp_out = NULL; 8438 struct duplicate_extents_to_file *dup_ext; 8439 loff_t src_off, dst_off, length, cloned; 8440 8441 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 8442 ret = -EINVAL; 8443 goto out; 8444 } 8445 8446 dup_ext = (struct duplicate_extents_to_file *)buffer; 8447 8448 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 8449 dup_ext->PersistentFileHandle); 8450 if (!fp_in) { 8451 pr_err("not found file handle in duplicate extent to file\n"); 8452 ret = -ENOENT; 8453 goto out; 8454 } 8455 8456 fp_out = ksmbd_lookup_fd_fast(work, id); 8457 if (!fp_out) { 8458 pr_err("not found fp\n"); 8459 ret = -ENOENT; 8460 goto dup_ext_out; 8461 } 8462 8463 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 8464 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 8465 length = le64_to_cpu(dup_ext->ByteCount); 8466 /* 8467 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 8468 * should fall back to vfs_copy_file_range(). This could be 8469 * beneficial when re-exporting nfs/smb mount, but note that 8470 * this can result in partial copy that returns an error status. 8471 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 8472 * fall back to vfs_copy_file_range(), should be avoided when 8473 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 8474 */ 8475 cloned = vfs_clone_file_range(fp_in->filp, src_off, 8476 fp_out->filp, dst_off, length, 0); 8477 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 8478 ret = -EOPNOTSUPP; 8479 goto dup_ext_out; 8480 } else if (cloned != length) { 8481 cloned = vfs_copy_file_range(fp_in->filp, src_off, 8482 fp_out->filp, dst_off, 8483 length, 0); 8484 if (cloned != length) { 8485 if (cloned < 0) 8486 ret = cloned; 8487 else 8488 ret = -EINVAL; 8489 } 8490 } 8491 8492 dup_ext_out: 8493 ksmbd_fd_put(work, fp_in); 8494 ksmbd_fd_put(work, fp_out); 8495 if (ret < 0) 8496 goto out; 8497 break; 8498 } 8499 default: 8500 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 8501 cnt_code); 8502 ret = -EOPNOTSUPP; 8503 goto out; 8504 } 8505 8506 rsp->CtlCode = cpu_to_le32(cnt_code); 8507 rsp->InputCount = cpu_to_le32(0); 8508 rsp->InputOffset = cpu_to_le32(112); 8509 rsp->OutputOffset = cpu_to_le32(112); 8510 rsp->OutputCount = cpu_to_le32(nbytes); 8511 rsp->StructureSize = cpu_to_le16(49); 8512 rsp->Reserved = cpu_to_le16(0); 8513 rsp->Flags = cpu_to_le32(0); 8514 rsp->Reserved2 = cpu_to_le32(0); 8515 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 8516 if (!ret) 8517 return ret; 8518 8519 out: 8520 if (ret == -EACCES) 8521 rsp->hdr.Status = STATUS_ACCESS_DENIED; 8522 else if (ret == -ENOENT) 8523 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 8524 else if (ret == -EOPNOTSUPP) 8525 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8526 else if (ret == -ENOSPC) 8527 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 8528 else if (ret < 0 || rsp->hdr.Status == 0) 8529 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8530 8531 out2: 8532 smb2_set_err_rsp(work); 8533 return ret; 8534 } 8535 8536 /** 8537 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 8538 * @work: smb work containing oplock break command buffer 8539 * 8540 * Return: 0 8541 */ 8542 static void smb20_oplock_break_ack(struct ksmbd_work *work) 8543 { 8544 struct smb2_oplock_break *req; 8545 struct smb2_oplock_break *rsp; 8546 struct ksmbd_file *fp; 8547 struct oplock_info *opinfo = NULL; 8548 __le32 err = 0; 8549 int ret = 0; 8550 u64 volatile_id, persistent_id; 8551 char req_oplevel = 0, rsp_oplevel = 0; 8552 unsigned int oplock_change_type; 8553 8554 WORK_BUFFERS(work, req, rsp); 8555 8556 volatile_id = req->VolatileFid; 8557 persistent_id = req->PersistentFid; 8558 req_oplevel = req->OplockLevel; 8559 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8560 volatile_id, persistent_id, req_oplevel); 8561 8562 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8563 if (!fp) { 8564 rsp->hdr.Status = STATUS_FILE_CLOSED; 8565 smb2_set_err_rsp(work); 8566 return; 8567 } 8568 8569 opinfo = opinfo_get(fp); 8570 if (!opinfo) { 8571 pr_err("unexpected null oplock_info\n"); 8572 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8573 smb2_set_err_rsp(work); 8574 ksmbd_fd_put(work, fp); 8575 return; 8576 } 8577 8578 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8579 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8580 goto err_out; 8581 } 8582 8583 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8584 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8585 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8586 goto err_out; 8587 } 8588 8589 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8590 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8591 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8592 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8593 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8594 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8595 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8596 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8597 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8598 oplock_change_type = OPLOCK_READ_TO_NONE; 8599 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8600 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8601 err = STATUS_INVALID_DEVICE_STATE; 8602 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8603 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8604 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8605 oplock_change_type = OPLOCK_WRITE_TO_READ; 8606 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8607 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8608 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8609 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8610 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8611 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8612 oplock_change_type = OPLOCK_READ_TO_NONE; 8613 } else { 8614 oplock_change_type = 0; 8615 } 8616 } else { 8617 oplock_change_type = 0; 8618 } 8619 8620 switch (oplock_change_type) { 8621 case OPLOCK_WRITE_TO_READ: 8622 ret = opinfo_write_to_read(opinfo); 8623 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8624 break; 8625 case OPLOCK_WRITE_TO_NONE: 8626 ret = opinfo_write_to_none(opinfo); 8627 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8628 break; 8629 case OPLOCK_READ_TO_NONE: 8630 ret = opinfo_read_to_none(opinfo); 8631 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8632 break; 8633 default: 8634 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8635 opinfo->level, rsp_oplevel); 8636 } 8637 8638 if (ret < 0) { 8639 rsp->hdr.Status = err; 8640 goto err_out; 8641 } 8642 8643 rsp->StructureSize = cpu_to_le16(24); 8644 rsp->OplockLevel = rsp_oplevel; 8645 rsp->Reserved = 0; 8646 rsp->Reserved2 = 0; 8647 rsp->VolatileFid = volatile_id; 8648 rsp->PersistentFid = persistent_id; 8649 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8650 if (ret) { 8651 err_out: 8652 smb2_set_err_rsp(work); 8653 } 8654 8655 opinfo->op_state = OPLOCK_STATE_NONE; 8656 wake_up_interruptible_all(&opinfo->oplock_q); 8657 opinfo_put(opinfo); 8658 ksmbd_fd_put(work, fp); 8659 } 8660 8661 static int check_lease_state(struct lease *lease, __le32 req_state) 8662 { 8663 if ((lease->new_state == 8664 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8665 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8666 lease->new_state = req_state; 8667 return 0; 8668 } 8669 8670 if (lease->new_state == req_state) 8671 return 0; 8672 8673 return 1; 8674 } 8675 8676 /** 8677 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8678 * @work: smb work containing lease break command buffer 8679 * 8680 * Return: 0 8681 */ 8682 static void smb21_lease_break_ack(struct ksmbd_work *work) 8683 { 8684 struct ksmbd_conn *conn = work->conn; 8685 struct smb2_lease_ack *req; 8686 struct smb2_lease_ack *rsp; 8687 struct oplock_info *opinfo; 8688 __le32 err = 0; 8689 int ret = 0; 8690 unsigned int lease_change_type; 8691 __le32 lease_state; 8692 struct lease *lease; 8693 8694 WORK_BUFFERS(work, req, rsp); 8695 8696 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8697 le32_to_cpu(req->LeaseState)); 8698 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8699 if (!opinfo) { 8700 ksmbd_debug(OPLOCK, "file not opened\n"); 8701 smb2_set_err_rsp(work); 8702 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8703 return; 8704 } 8705 lease = opinfo->o_lease; 8706 8707 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8708 pr_err("unexpected lease break state 0x%x\n", 8709 opinfo->op_state); 8710 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8711 goto err_out; 8712 } 8713 8714 if (check_lease_state(lease, req->LeaseState)) { 8715 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8716 ksmbd_debug(OPLOCK, 8717 "req lease state: 0x%x, expected state: 0x%x\n", 8718 req->LeaseState, lease->new_state); 8719 goto err_out; 8720 } 8721 8722 if (!atomic_read(&opinfo->breaking_cnt)) { 8723 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8724 goto err_out; 8725 } 8726 8727 /* check for bad lease state */ 8728 if (req->LeaseState & 8729 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8730 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8731 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8732 lease_change_type = OPLOCK_WRITE_TO_NONE; 8733 else 8734 lease_change_type = OPLOCK_READ_TO_NONE; 8735 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8736 le32_to_cpu(lease->state), 8737 le32_to_cpu(req->LeaseState)); 8738 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8739 req->LeaseState != SMB2_LEASE_NONE_LE) { 8740 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8741 lease_change_type = OPLOCK_READ_TO_NONE; 8742 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8743 le32_to_cpu(lease->state), 8744 le32_to_cpu(req->LeaseState)); 8745 } else { 8746 /* valid lease state changes */ 8747 err = STATUS_INVALID_DEVICE_STATE; 8748 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8749 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8750 lease_change_type = OPLOCK_WRITE_TO_NONE; 8751 else 8752 lease_change_type = OPLOCK_READ_TO_NONE; 8753 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8754 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8755 lease_change_type = OPLOCK_WRITE_TO_READ; 8756 else 8757 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8758 } else { 8759 lease_change_type = 0; 8760 } 8761 } 8762 8763 switch (lease_change_type) { 8764 case OPLOCK_WRITE_TO_READ: 8765 ret = opinfo_write_to_read(opinfo); 8766 break; 8767 case OPLOCK_READ_HANDLE_TO_READ: 8768 ret = opinfo_read_handle_to_read(opinfo); 8769 break; 8770 case OPLOCK_WRITE_TO_NONE: 8771 ret = opinfo_write_to_none(opinfo); 8772 break; 8773 case OPLOCK_READ_TO_NONE: 8774 ret = opinfo_read_to_none(opinfo); 8775 break; 8776 default: 8777 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8778 le32_to_cpu(lease->state), 8779 le32_to_cpu(req->LeaseState)); 8780 } 8781 8782 if (ret < 0) { 8783 rsp->hdr.Status = err; 8784 goto err_out; 8785 } 8786 8787 lease_state = lease->state; 8788 8789 rsp->StructureSize = cpu_to_le16(36); 8790 rsp->Reserved = 0; 8791 rsp->Flags = 0; 8792 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8793 rsp->LeaseState = lease_state; 8794 rsp->LeaseDuration = 0; 8795 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8796 if (ret) { 8797 err_out: 8798 smb2_set_err_rsp(work); 8799 } 8800 8801 opinfo->op_state = OPLOCK_STATE_NONE; 8802 wake_up_interruptible_all(&opinfo->oplock_q); 8803 atomic_dec(&opinfo->breaking_cnt); 8804 wake_up_interruptible_all(&opinfo->oplock_brk); 8805 opinfo_put(opinfo); 8806 } 8807 8808 /** 8809 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8810 * @work: smb work containing oplock/lease break command buffer 8811 * 8812 * Return: 0 on success, otherwise error 8813 */ 8814 int smb2_oplock_break(struct ksmbd_work *work) 8815 { 8816 struct smb2_oplock_break *req; 8817 struct smb2_oplock_break *rsp; 8818 8819 ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n"); 8820 8821 WORK_BUFFERS(work, req, rsp); 8822 8823 switch (le16_to_cpu(req->StructureSize)) { 8824 case OP_BREAK_STRUCT_SIZE_20: 8825 smb20_oplock_break_ack(work); 8826 break; 8827 case OP_BREAK_STRUCT_SIZE_21: 8828 smb21_lease_break_ack(work); 8829 break; 8830 default: 8831 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8832 le16_to_cpu(req->StructureSize)); 8833 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8834 smb2_set_err_rsp(work); 8835 return -EINVAL; 8836 } 8837 8838 return 0; 8839 } 8840 8841 /** 8842 * smb2_notify() - handler for smb2 notify request 8843 * @work: smb work containing notify command buffer 8844 * 8845 * Return: 0 on success, otherwise error 8846 */ 8847 int smb2_notify(struct ksmbd_work *work) 8848 { 8849 struct smb2_change_notify_req *req; 8850 struct smb2_change_notify_rsp *rsp; 8851 8852 ksmbd_debug(SMB, "Received smb2 notify\n"); 8853 8854 WORK_BUFFERS(work, req, rsp); 8855 8856 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8857 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8858 smb2_set_err_rsp(work); 8859 return -EIO; 8860 } 8861 8862 smb2_set_err_rsp(work); 8863 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8864 return -EOPNOTSUPP; 8865 } 8866 8867 /** 8868 * smb2_is_sign_req() - handler for checking packet signing status 8869 * @work: smb work containing notify command buffer 8870 * @command: SMB2 command id 8871 * 8872 * Return: true if packed is signed, false otherwise 8873 */ 8874 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8875 { 8876 struct smb2_hdr *rcv_hdr2 = smb_get_msg(work->request_buf); 8877 8878 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8879 command != SMB2_NEGOTIATE_HE && 8880 command != SMB2_SESSION_SETUP_HE && 8881 command != SMB2_OPLOCK_BREAK_HE) 8882 return true; 8883 8884 return false; 8885 } 8886 8887 /** 8888 * smb2_check_sign_req() - handler for req packet sign processing 8889 * @work: smb work containing notify command buffer 8890 * 8891 * Return: 1 on success, 0 otherwise 8892 */ 8893 int smb2_check_sign_req(struct ksmbd_work *work) 8894 { 8895 struct smb2_hdr *hdr; 8896 char signature_req[SMB2_SIGNATURE_SIZE]; 8897 char signature[SMB2_HMACSHA256_SIZE]; 8898 struct kvec iov[1]; 8899 size_t len; 8900 8901 hdr = smb_get_msg(work->request_buf); 8902 if (work->next_smb2_rcv_hdr_off) 8903 hdr = ksmbd_req_buf_next(work); 8904 8905 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8906 len = get_rfc1002_len(work->request_buf); 8907 else if (hdr->NextCommand) 8908 len = le32_to_cpu(hdr->NextCommand); 8909 else 8910 len = get_rfc1002_len(work->request_buf) - 8911 work->next_smb2_rcv_hdr_off; 8912 8913 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8914 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8915 8916 iov[0].iov_base = (char *)&hdr->ProtocolId; 8917 iov[0].iov_len = len; 8918 8919 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8920 signature); 8921 8922 if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8923 pr_err("bad smb2 signature\n"); 8924 return 0; 8925 } 8926 8927 return 1; 8928 } 8929 8930 /** 8931 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8932 * @work: smb work containing notify command buffer 8933 * 8934 */ 8935 void smb2_set_sign_rsp(struct ksmbd_work *work) 8936 { 8937 struct smb2_hdr *hdr; 8938 char signature[SMB2_HMACSHA256_SIZE]; 8939 struct kvec *iov; 8940 int n_vec = 1; 8941 8942 hdr = ksmbd_resp_buf_curr(work); 8943 hdr->Flags |= SMB2_FLAGS_SIGNED; 8944 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8945 8946 if (hdr->Command == SMB2_READ) { 8947 iov = &work->iov[work->iov_idx - 1]; 8948 n_vec++; 8949 } else { 8950 iov = &work->iov[work->iov_idx]; 8951 } 8952 8953 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8954 signature); 8955 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8956 } 8957 8958 /** 8959 * smb3_check_sign_req() - handler for req packet sign processing 8960 * @work: smb work containing notify command buffer 8961 * 8962 * Return: 1 on success, 0 otherwise 8963 */ 8964 int smb3_check_sign_req(struct ksmbd_work *work) 8965 { 8966 struct ksmbd_conn *conn = work->conn; 8967 char *signing_key; 8968 struct smb2_hdr *hdr; 8969 struct channel *chann; 8970 char signature_req[SMB2_SIGNATURE_SIZE]; 8971 char signature[SMB2_CMACAES_SIZE]; 8972 struct kvec iov[1]; 8973 size_t len; 8974 8975 hdr = smb_get_msg(work->request_buf); 8976 if (work->next_smb2_rcv_hdr_off) 8977 hdr = ksmbd_req_buf_next(work); 8978 8979 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8980 len = get_rfc1002_len(work->request_buf); 8981 else if (hdr->NextCommand) 8982 len = le32_to_cpu(hdr->NextCommand); 8983 else 8984 len = get_rfc1002_len(work->request_buf) - 8985 work->next_smb2_rcv_hdr_off; 8986 8987 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8988 signing_key = work->sess->smb3signingkey; 8989 } else { 8990 chann = lookup_chann_list(work->sess, conn); 8991 if (!chann) { 8992 return 0; 8993 } 8994 signing_key = chann->smb3signingkey; 8995 } 8996 8997 if (!signing_key) { 8998 pr_err("SMB3 signing key is not generated\n"); 8999 return 0; 9000 } 9001 9002 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 9003 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9004 iov[0].iov_base = (char *)&hdr->ProtocolId; 9005 iov[0].iov_len = len; 9006 9007 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 9008 return 0; 9009 9010 if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 9011 pr_err("bad smb2 signature\n"); 9012 return 0; 9013 } 9014 9015 return 1; 9016 } 9017 9018 /** 9019 * smb3_set_sign_rsp() - handler for rsp packet sign processing 9020 * @work: smb work containing notify command buffer 9021 * 9022 */ 9023 void smb3_set_sign_rsp(struct ksmbd_work *work) 9024 { 9025 struct ksmbd_conn *conn = work->conn; 9026 struct smb2_hdr *hdr; 9027 struct channel *chann; 9028 char signature[SMB2_CMACAES_SIZE]; 9029 struct kvec *iov; 9030 int n_vec = 1; 9031 char *signing_key; 9032 9033 hdr = ksmbd_resp_buf_curr(work); 9034 9035 if (conn->binding == false && 9036 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 9037 signing_key = work->sess->smb3signingkey; 9038 } else { 9039 chann = lookup_chann_list(work->sess, work->conn); 9040 if (!chann) { 9041 return; 9042 } 9043 signing_key = chann->smb3signingkey; 9044 } 9045 9046 if (!signing_key) 9047 return; 9048 9049 hdr->Flags |= SMB2_FLAGS_SIGNED; 9050 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9051 9052 if (hdr->Command == SMB2_READ) { 9053 iov = &work->iov[work->iov_idx - 1]; 9054 n_vec++; 9055 } else { 9056 iov = &work->iov[work->iov_idx]; 9057 } 9058 9059 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 9060 signature)) 9061 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9062 } 9063 9064 /** 9065 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 9066 * @work: smb work containing response buffer 9067 * 9068 */ 9069 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 9070 { 9071 struct ksmbd_conn *conn = work->conn; 9072 struct ksmbd_session *sess = work->sess; 9073 struct smb2_hdr *req, *rsp; 9074 9075 if (conn->dialect != SMB311_PROT_ID) 9076 return; 9077 9078 WORK_BUFFERS(work, req, rsp); 9079 9080 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 9081 conn->preauth_info) 9082 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9083 conn->preauth_info->Preauth_HashValue); 9084 9085 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 9086 __u8 *hash_value; 9087 9088 if (conn->binding) { 9089 struct preauth_session *preauth_sess; 9090 9091 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 9092 if (!preauth_sess) 9093 return; 9094 hash_value = preauth_sess->Preauth_HashValue; 9095 } else { 9096 hash_value = sess->Preauth_HashValue; 9097 if (!hash_value) 9098 return; 9099 } 9100 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9101 hash_value); 9102 } 9103 } 9104 9105 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 9106 { 9107 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 9108 struct smb2_hdr *hdr = smb_get_msg(old_buf); 9109 unsigned int orig_len = get_rfc1002_len(old_buf); 9110 9111 /* tr_buf must be cleared by the caller */ 9112 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 9113 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 9114 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 9115 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 9116 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 9117 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 9118 else 9119 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 9120 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 9121 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 9122 inc_rfc1001_len(tr_buf, orig_len); 9123 } 9124 9125 int smb3_encrypt_resp(struct ksmbd_work *work) 9126 { 9127 struct kvec *iov = work->iov; 9128 int rc = -ENOMEM; 9129 void *tr_buf; 9130 9131 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP); 9132 if (!tr_buf) 9133 return rc; 9134 9135 /* fill transform header */ 9136 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 9137 9138 iov[0].iov_base = tr_buf; 9139 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9140 work->tr_buf = tr_buf; 9141 9142 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 9143 } 9144 9145 bool smb3_is_transform_hdr(void *buf) 9146 { 9147 struct smb2_transform_hdr *trhdr = smb_get_msg(buf); 9148 9149 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 9150 } 9151 9152 int smb3_decrypt_req(struct ksmbd_work *work) 9153 { 9154 struct ksmbd_session *sess; 9155 char *buf = work->request_buf; 9156 unsigned int pdu_length = get_rfc1002_len(buf); 9157 struct kvec iov[2]; 9158 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 9159 struct smb2_transform_hdr *tr_hdr = smb_get_msg(buf); 9160 int rc = 0; 9161 9162 if (pdu_length < sizeof(struct smb2_transform_hdr) || 9163 buf_data_size < sizeof(struct smb2_hdr)) { 9164 pr_err("Transform message is too small (%u)\n", 9165 pdu_length); 9166 return -ECONNABORTED; 9167 } 9168 9169 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 9170 pr_err("Transform message is broken\n"); 9171 return -ECONNABORTED; 9172 } 9173 9174 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 9175 if (!sess) { 9176 pr_err("invalid session id(%llx) in transform header\n", 9177 le64_to_cpu(tr_hdr->SessionId)); 9178 return -ECONNABORTED; 9179 } 9180 ksmbd_user_session_put(sess); 9181 9182 iov[0].iov_base = buf; 9183 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9184 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 9185 iov[1].iov_len = buf_data_size; 9186 rc = ksmbd_crypt_message(work, iov, 2, 0); 9187 if (rc) 9188 return rc; 9189 9190 memmove(buf + 4, iov[1].iov_base, buf_data_size); 9191 *(__be32 *)buf = cpu_to_be32(buf_data_size); 9192 9193 return rc; 9194 } 9195 9196 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 9197 { 9198 struct ksmbd_conn *conn = work->conn; 9199 struct ksmbd_session *sess = work->sess; 9200 struct smb2_hdr *rsp = smb_get_msg(work->response_buf); 9201 9202 if (conn->dialect < SMB30_PROT_ID) 9203 return false; 9204 9205 if (work->next_smb2_rcv_hdr_off) 9206 rsp = ksmbd_resp_buf_next(work); 9207 9208 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 9209 sess->user && !user_guest(sess->user) && 9210 rsp->Status == STATUS_SUCCESS) 9211 return true; 9212 return false; 9213 } 9214