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 #include <linux/fileattr.h> 18 19 #include "glob.h" 20 #include "smbfsctl.h" 21 #include "oplock.h" 22 #include "smbacl.h" 23 24 #include "auth.h" 25 #include "asn1.h" 26 #include "connection.h" 27 #include "transport_ipc.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->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 ksmbd_put_durable_fd(dh_info->fp); 2849 dh_info->fp = NULL; 2850 } 2851 2852 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2853 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2854 dh_info->CreateGuid = 2855 durable_v2_blob->dcontext.CreateGuid; 2856 dh_info->persistent = 2857 le32_to_cpu(durable_v2_blob->dcontext.Flags); 2858 dh_info->timeout = 2859 le32_to_cpu(durable_v2_blob->dcontext.Timeout); 2860 dh_info->type = dh_idx; 2861 } 2862 break; 2863 } 2864 case DURABLE_REQ: 2865 if (dh_info->type == DURABLE_RECONN) 2866 goto out; 2867 if (dh_info->type == DURABLE_RECONN_V2 || 2868 dh_info->type == DURABLE_REQ_V2) { 2869 err = -EINVAL; 2870 goto out; 2871 } 2872 2873 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || 2874 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { 2875 ksmbd_debug(SMB, "Request for durable open\n"); 2876 dh_info->type = dh_idx; 2877 } 2878 } 2879 } 2880 2881 out: 2882 return err; 2883 } 2884 2885 /** 2886 * smb2_open() - handler for smb file open request 2887 * @work: smb work containing request buffer 2888 * 2889 * Return: 0 on success, otherwise error 2890 */ 2891 int smb2_open(struct ksmbd_work *work) 2892 { 2893 struct ksmbd_conn *conn = work->conn; 2894 struct ksmbd_session *sess = work->sess; 2895 struct ksmbd_tree_connect *tcon = work->tcon; 2896 struct smb2_create_req *req; 2897 struct smb2_create_rsp *rsp; 2898 struct path path; 2899 struct ksmbd_share_config *share = tcon->share_conf; 2900 struct ksmbd_file *fp = NULL; 2901 struct file *filp = NULL; 2902 struct mnt_idmap *idmap = NULL; 2903 struct kstat stat; 2904 struct create_context *context; 2905 struct lease_ctx_info *lc = NULL; 2906 struct create_ea_buf_req *ea_buf = NULL; 2907 struct oplock_info *opinfo; 2908 struct durable_info dh_info = {0}; 2909 __le32 *next_ptr = NULL; 2910 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2911 int rc = 0; 2912 int contxt_cnt = 0, query_disk_id = 0; 2913 bool maximal_access_ctxt = false, posix_ctxt = false; 2914 int s_type = 0; 2915 int next_off = 0; 2916 char *name = NULL; 2917 char *stream_name = NULL; 2918 bool file_present = false, created = false, already_permitted = false; 2919 int share_ret, need_truncate = 0; 2920 u64 time; 2921 umode_t posix_mode = 0; 2922 __le32 daccess, maximal_access = 0; 2923 int iov_len = 0; 2924 2925 ksmbd_debug(SMB, "Received smb2 create request\n"); 2926 2927 WORK_BUFFERS(work, req, rsp); 2928 2929 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2930 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2931 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2932 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2933 smb2_set_err_rsp(work); 2934 return -EINVAL; 2935 } 2936 2937 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2938 ksmbd_debug(SMB, "IPC pipe create request\n"); 2939 return create_smb2_pipe(work); 2940 } 2941 2942 if (req->CreateContextsOffset && tcon->posix_extensions) { 2943 context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); 2944 if (IS_ERR(context)) { 2945 rc = PTR_ERR(context); 2946 goto err_out2; 2947 } else if (context) { 2948 struct create_posix *posix = (struct create_posix *)context; 2949 2950 if (le16_to_cpu(context->DataOffset) + 2951 le32_to_cpu(context->DataLength) < 2952 sizeof(struct create_posix) - 4) { 2953 rc = -EINVAL; 2954 goto err_out2; 2955 } 2956 ksmbd_debug(SMB, "get posix context\n"); 2957 2958 posix_mode = le32_to_cpu(posix->Mode); 2959 posix_ctxt = true; 2960 } 2961 } 2962 2963 if (req->NameLength) { 2964 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), 2965 le16_to_cpu(req->NameLength), 2966 work->conn->local_nls); 2967 if (IS_ERR(name)) { 2968 rc = PTR_ERR(name); 2969 name = NULL; 2970 goto err_out2; 2971 } 2972 2973 ksmbd_debug(SMB, "converted name = %s\n", name); 2974 2975 if (posix_ctxt == false) { 2976 if (strchr(name, ':')) { 2977 if (!test_share_config_flag(work->tcon->share_conf, 2978 KSMBD_SHARE_FLAG_STREAMS)) { 2979 rc = -EBADF; 2980 goto err_out2; 2981 } 2982 rc = parse_stream_name(name, &stream_name, &s_type); 2983 if (rc < 0) 2984 goto err_out2; 2985 } 2986 2987 rc = ksmbd_validate_filename(name); 2988 if (rc < 0) 2989 goto err_out2; 2990 } 2991 2992 if (ksmbd_share_veto_filename(share, name)) { 2993 rc = -ENOENT; 2994 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2995 name); 2996 goto err_out2; 2997 } 2998 } else { 2999 name = kstrdup("", KSMBD_DEFAULT_GFP); 3000 if (!name) { 3001 rc = -ENOMEM; 3002 goto err_out2; 3003 } 3004 } 3005 3006 req_op_level = req->RequestedOplockLevel; 3007 3008 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && 3009 req->CreateContextsOffset) { 3010 lc = parse_lease_state(req); 3011 rc = parse_durable_handle_context(work, req, lc, &dh_info); 3012 if (rc) { 3013 ksmbd_debug(SMB, "error parsing durable handle context\n"); 3014 goto err_out2; 3015 } 3016 3017 if (dh_info.reconnected == true) { 3018 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, 3019 lc, sess->user, name); 3020 if (rc) 3021 goto err_out2; 3022 3023 rc = ksmbd_reopen_durable_fd(work, dh_info.fp); 3024 if (rc) 3025 goto err_out2; 3026 3027 fp = dh_info.fp; 3028 3029 if (ksmbd_override_fsids(work)) { 3030 rc = -ENOMEM; 3031 goto err_out2; 3032 } 3033 3034 file_info = FILE_OPENED; 3035 3036 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); 3037 if (rc) 3038 goto err_out2; 3039 3040 goto reconnected_fp; 3041 } 3042 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 3043 lc = parse_lease_state(req); 3044 3045 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 3046 pr_err("Invalid impersonationlevel : 0x%x\n", 3047 le32_to_cpu(req->ImpersonationLevel)); 3048 rc = -EIO; 3049 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 3050 goto err_out2; 3051 } 3052 3053 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 3054 pr_err("Invalid create options : 0x%x\n", 3055 le32_to_cpu(req->CreateOptions)); 3056 rc = -EINVAL; 3057 goto err_out2; 3058 } else { 3059 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 3060 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 3061 req->CreateOptions &= ~FILE_SEQUENTIAL_ONLY_LE; 3062 3063 if (req->CreateOptions & 3064 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 3065 FILE_RESERVE_OPFILTER_LE)) { 3066 rc = -EOPNOTSUPP; 3067 goto err_out2; 3068 } 3069 3070 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3071 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 3072 rc = -EINVAL; 3073 goto err_out2; 3074 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 3075 req->CreateOptions &= ~FILE_NO_COMPRESSION_LE; 3076 } 3077 } 3078 } 3079 3080 if (le32_to_cpu(req->CreateDisposition) > 3081 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 3082 pr_err("Invalid create disposition : 0x%x\n", 3083 le32_to_cpu(req->CreateDisposition)); 3084 rc = -EINVAL; 3085 goto err_out2; 3086 } 3087 3088 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 3089 pr_err("Invalid desired access : 0x%x\n", 3090 le32_to_cpu(req->DesiredAccess)); 3091 rc = -EACCES; 3092 goto err_out2; 3093 } 3094 3095 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 3096 pr_err("Invalid file attribute : 0x%x\n", 3097 le32_to_cpu(req->FileAttributes)); 3098 rc = -EINVAL; 3099 goto err_out2; 3100 } 3101 3102 if (req->CreateContextsOffset) { 3103 /* Parse non-durable handle create contexts */ 3104 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 3105 if (IS_ERR(context)) { 3106 rc = PTR_ERR(context); 3107 goto err_out2; 3108 } else if (context) { 3109 ea_buf = (struct create_ea_buf_req *)context; 3110 if (le16_to_cpu(context->DataOffset) + 3111 le32_to_cpu(context->DataLength) < 3112 sizeof(struct create_ea_buf_req)) { 3113 rc = -EINVAL; 3114 goto err_out2; 3115 } 3116 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 3117 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3118 rc = -EACCES; 3119 goto err_out2; 3120 } 3121 } 3122 3123 context = smb2_find_context_vals(req, 3124 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 3125 if (IS_ERR(context)) { 3126 rc = PTR_ERR(context); 3127 goto err_out2; 3128 } else if (context) { 3129 ksmbd_debug(SMB, 3130 "get query maximal access context\n"); 3131 maximal_access_ctxt = 1; 3132 } 3133 3134 context = smb2_find_context_vals(req, 3135 SMB2_CREATE_TIMEWARP_REQUEST, 4); 3136 if (IS_ERR(context)) { 3137 rc = PTR_ERR(context); 3138 goto err_out2; 3139 } else if (context) { 3140 ksmbd_debug(SMB, "get timewarp context\n"); 3141 rc = -EBADF; 3142 goto err_out2; 3143 } 3144 } 3145 3146 if (ksmbd_override_fsids(work)) { 3147 rc = -ENOMEM; 3148 goto err_out2; 3149 } 3150 3151 rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, 3152 &path, 1); 3153 if (!rc) { 3154 file_present = true; 3155 3156 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 3157 /* 3158 * If file exists with under flags, return access 3159 * denied error. 3160 */ 3161 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 3162 req->CreateDisposition == FILE_OPEN_IF_LE) { 3163 rc = -EACCES; 3164 goto err_out; 3165 } 3166 3167 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3168 ksmbd_debug(SMB, 3169 "User does not have write permission\n"); 3170 rc = -EACCES; 3171 goto err_out; 3172 } 3173 } else if (d_is_symlink(path.dentry)) { 3174 rc = -EACCES; 3175 goto err_out; 3176 } 3177 3178 idmap = mnt_idmap(path.mnt); 3179 } else { 3180 if (rc != -ENOENT) 3181 goto err_out; 3182 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 3183 name, rc); 3184 rc = 0; 3185 } 3186 3187 if (stream_name) { 3188 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 3189 if (s_type == DATA_STREAM) { 3190 rc = -EIO; 3191 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3192 } 3193 } else { 3194 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 3195 s_type == DATA_STREAM) { 3196 rc = -EIO; 3197 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3198 } 3199 } 3200 3201 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 3202 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 3203 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3204 rc = -EIO; 3205 } 3206 3207 if (rc < 0) 3208 goto err_out; 3209 } 3210 3211 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 3212 S_ISDIR(d_inode(path.dentry)->i_mode) && 3213 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3214 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 3215 name, req->CreateOptions); 3216 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 3217 rc = -EIO; 3218 goto err_out; 3219 } 3220 3221 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 3222 !(req->CreateDisposition == FILE_CREATE_LE) && 3223 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 3224 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 3225 rc = -EIO; 3226 goto err_out; 3227 } 3228 3229 if (!stream_name && file_present && 3230 req->CreateDisposition == FILE_CREATE_LE) { 3231 rc = -EEXIST; 3232 goto err_out; 3233 } 3234 3235 daccess = smb_map_generic_desired_access(req->DesiredAccess); 3236 3237 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3238 rc = smb_check_perm_dacl(conn, &path, &daccess, 3239 sess->user->uid); 3240 if (rc) 3241 goto err_out; 3242 } 3243 3244 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 3245 if (!file_present) { 3246 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 3247 } else { 3248 ksmbd_vfs_query_maximal_access(idmap, 3249 path.dentry, 3250 &daccess); 3251 already_permitted = true; 3252 } 3253 maximal_access = daccess; 3254 } 3255 3256 open_flags = smb2_create_open_flags(file_present, daccess, 3257 req->CreateDisposition, 3258 &may_flags, 3259 req->CreateOptions, 3260 file_present ? d_inode(path.dentry)->i_mode : 0); 3261 3262 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 3263 if (open_flags & (O_CREAT | O_TRUNC)) { 3264 ksmbd_debug(SMB, 3265 "User does not have write permission\n"); 3266 rc = -EACCES; 3267 goto err_out; 3268 } 3269 } 3270 3271 /*create file if not present */ 3272 if (!file_present) { 3273 rc = smb2_creat(work, &path, name, open_flags, 3274 posix_mode, 3275 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 3276 if (rc) { 3277 if (rc == -ENOENT) { 3278 rc = -EIO; 3279 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 3280 } 3281 goto err_out; 3282 } 3283 3284 created = true; 3285 idmap = mnt_idmap(path.mnt); 3286 if (ea_buf) { 3287 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3288 sizeof(struct smb2_ea_info)) { 3289 rc = -EINVAL; 3290 goto err_out; 3291 } 3292 3293 rc = smb2_set_ea(&ea_buf->ea, 3294 le32_to_cpu(ea_buf->ccontext.DataLength), 3295 &path, false); 3296 if (rc == -EOPNOTSUPP) 3297 rc = 0; 3298 else if (rc) 3299 goto err_out; 3300 } 3301 } else if (!already_permitted) { 3302 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3303 * because execute(search) permission on a parent directory, 3304 * is already granted. 3305 */ 3306 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3307 rc = inode_permission(idmap, 3308 d_inode(path.dentry), 3309 may_flags); 3310 if (rc) 3311 goto err_out; 3312 3313 if ((daccess & FILE_DELETE_LE) || 3314 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3315 rc = inode_permission(idmap, 3316 d_inode(path.dentry->d_parent), 3317 MAY_EXEC | MAY_WRITE); 3318 if (rc) 3319 goto err_out; 3320 } 3321 } 3322 } 3323 3324 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3325 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3326 rc = -EBUSY; 3327 goto err_out; 3328 } 3329 3330 rc = 0; 3331 filp = dentry_open(&path, open_flags, current_cred()); 3332 if (IS_ERR(filp)) { 3333 rc = PTR_ERR(filp); 3334 pr_err("dentry open for dir failed, rc %d\n", rc); 3335 goto err_out; 3336 } 3337 3338 if (file_present) { 3339 if (!(open_flags & O_TRUNC)) 3340 file_info = FILE_OPENED; 3341 else 3342 file_info = FILE_OVERWRITTEN; 3343 3344 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3345 FILE_SUPERSEDE_LE) 3346 file_info = FILE_SUPERSEDED; 3347 } else if (open_flags & O_CREAT) { 3348 file_info = FILE_CREATED; 3349 } 3350 3351 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3352 3353 /* Obtain Volatile-ID */ 3354 fp = ksmbd_open_fd(work, filp); 3355 if (IS_ERR(fp)) { 3356 fput(filp); 3357 rc = PTR_ERR(fp); 3358 fp = NULL; 3359 goto err_out; 3360 } 3361 3362 /* Get Persistent-ID */ 3363 ksmbd_open_durable_fd(fp); 3364 if (!has_file_id(fp->persistent_id)) { 3365 rc = -ENOMEM; 3366 goto err_out; 3367 } 3368 3369 fp->cdoption = req->CreateDisposition; 3370 fp->daccess = daccess; 3371 fp->saccess = req->ShareAccess; 3372 fp->coption = req->CreateOptions; 3373 3374 /* Set default windows and posix acls if creating new file */ 3375 if (created) { 3376 int posix_acl_rc; 3377 struct inode *inode = d_inode(path.dentry); 3378 3379 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3380 &path, 3381 d_inode(path.dentry->d_parent)); 3382 if (posix_acl_rc) 3383 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3384 3385 if (test_share_config_flag(work->tcon->share_conf, 3386 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3387 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3388 sess->user->gid); 3389 } 3390 3391 if (rc) { 3392 rc = smb2_create_sd_buffer(work, req, &path); 3393 if (rc) { 3394 if (posix_acl_rc) 3395 ksmbd_vfs_set_init_posix_acl(idmap, 3396 &path); 3397 3398 if (test_share_config_flag(work->tcon->share_conf, 3399 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3400 struct smb_fattr fattr; 3401 struct smb_ntsd *pntsd; 3402 int pntsd_size; 3403 size_t scratch_len; 3404 3405 ksmbd_acls_fattr(&fattr, idmap, inode); 3406 scratch_len = smb_acl_sec_desc_scratch_len(&fattr, 3407 NULL, 0, 3408 OWNER_SECINFO | GROUP_SECINFO | 3409 DACL_SECINFO); 3410 if (!scratch_len || scratch_len == SIZE_MAX) { 3411 rc = -EFBIG; 3412 posix_acl_release(fattr.cf_acls); 3413 posix_acl_release(fattr.cf_dacls); 3414 goto err_out; 3415 } 3416 3417 pntsd = kvzalloc(scratch_len, KSMBD_DEFAULT_GFP); 3418 if (!pntsd) { 3419 rc = -ENOMEM; 3420 posix_acl_release(fattr.cf_acls); 3421 posix_acl_release(fattr.cf_dacls); 3422 goto err_out; 3423 } 3424 3425 rc = build_sec_desc(idmap, 3426 pntsd, NULL, 0, 3427 OWNER_SECINFO | 3428 GROUP_SECINFO | 3429 DACL_SECINFO, 3430 &pntsd_size, &fattr); 3431 posix_acl_release(fattr.cf_acls); 3432 posix_acl_release(fattr.cf_dacls); 3433 if (rc) { 3434 kvfree(pntsd); 3435 goto err_out; 3436 } 3437 3438 rc = ksmbd_vfs_set_sd_xattr(conn, 3439 idmap, 3440 &path, 3441 pntsd, 3442 pntsd_size, 3443 false); 3444 kvfree(pntsd); 3445 if (rc) 3446 pr_err("failed to store ntacl in xattr : %d\n", 3447 rc); 3448 } 3449 } 3450 } 3451 rc = 0; 3452 } 3453 3454 if (stream_name) { 3455 rc = smb2_set_stream_name_xattr(&path, 3456 fp, 3457 stream_name, 3458 s_type); 3459 if (rc) 3460 goto err_out; 3461 file_info = FILE_CREATED; 3462 } 3463 3464 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3465 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3466 3467 fp->is_posix_ctxt = posix_ctxt; 3468 3469 /* fp should be searchable through ksmbd_inode.m_fp_list 3470 * after daccess, saccess, attrib_only, and stream are 3471 * initialized. 3472 */ 3473 down_write(&fp->f_ci->m_lock); 3474 list_add(&fp->node, &fp->f_ci->m_fp_list); 3475 up_write(&fp->f_ci->m_lock); 3476 3477 /* Check delete pending among previous fp before oplock break */ 3478 if (ksmbd_inode_pending_delete(fp)) { 3479 rc = -EBUSY; 3480 goto err_out; 3481 } 3482 3483 if (file_present || created) 3484 path_put(&path); 3485 3486 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3487 !fp->attrib_only && !stream_name) { 3488 smb_break_all_oplock(work, fp); 3489 need_truncate = 1; 3490 } 3491 3492 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3493 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3494 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3495 !(conn->vals->req_capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3496 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3497 rc = share_ret; 3498 goto err_out1; 3499 } 3500 } else { 3501 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { 3502 if (S_ISDIR(file_inode(filp)->i_mode)) { 3503 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; 3504 lc->is_dir = true; 3505 } 3506 3507 /* 3508 * Compare parent lease using parent key. If there is no 3509 * a lease that has same parent key, Send lease break 3510 * notification. 3511 */ 3512 smb_send_parent_lease_break_noti(fp, lc); 3513 3514 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3515 ksmbd_debug(SMB, 3516 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3517 name, req_op_level, lc->req_state); 3518 rc = find_same_lease_key(sess, fp->f_ci, lc); 3519 if (rc) 3520 goto err_out1; 3521 } else if (open_flags == O_RDONLY && 3522 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3523 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3524 req_op_level = SMB2_OPLOCK_LEVEL_II; 3525 3526 rc = smb_grant_oplock(work, req_op_level, 3527 fp->persistent_id, fp, 3528 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3529 lc, share_ret); 3530 if (rc < 0) 3531 goto err_out1; 3532 } 3533 3534 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3535 ksmbd_fd_set_delete_on_close(fp, file_info); 3536 3537 if (need_truncate) { 3538 rc = smb2_create_truncate(&fp->filp->f_path); 3539 if (rc) 3540 goto err_out1; 3541 } 3542 3543 if (req->CreateContextsOffset) { 3544 struct create_alloc_size_req *az_req; 3545 3546 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3547 SMB2_CREATE_ALLOCATION_SIZE, 4); 3548 if (IS_ERR(az_req)) { 3549 rc = PTR_ERR(az_req); 3550 goto err_out1; 3551 } else if (az_req) { 3552 loff_t alloc_size; 3553 int err; 3554 3555 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3556 le32_to_cpu(az_req->ccontext.DataLength) < 3557 sizeof(struct create_alloc_size_req)) { 3558 rc = -EINVAL; 3559 goto err_out1; 3560 } 3561 alloc_size = le64_to_cpu(az_req->AllocationSize); 3562 ksmbd_debug(SMB, 3563 "request smb2 create allocate size : %llu\n", 3564 alloc_size); 3565 smb_break_all_levII_oplock(work, fp, 1); 3566 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3567 alloc_size); 3568 if (err < 0) 3569 ksmbd_debug(SMB, 3570 "vfs_fallocate is failed : %d\n", 3571 err); 3572 } 3573 3574 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3575 if (IS_ERR(context)) { 3576 rc = PTR_ERR(context); 3577 goto err_out1; 3578 } else if (context) { 3579 ksmbd_debug(SMB, "get query on disk id context\n"); 3580 query_disk_id = 1; 3581 } 3582 3583 if (conn->is_aapl == false) { 3584 context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); 3585 if (IS_ERR(context)) { 3586 rc = PTR_ERR(context); 3587 goto err_out1; 3588 } else if (context) 3589 conn->is_aapl = true; 3590 } 3591 } 3592 3593 rc = ksmbd_vfs_getattr(&path, &stat); 3594 if (rc) 3595 goto err_out1; 3596 3597 if (stat.result_mask & STATX_BTIME) 3598 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3599 else 3600 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3601 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3602 fp->f_ci->m_fattr = 3603 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3604 3605 if (!created) 3606 smb2_update_xattrs(tcon, &path, fp); 3607 else 3608 smb2_new_xattrs(tcon, &path, fp); 3609 3610 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3611 3612 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { 3613 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && 3614 test_share_config_flag(work->tcon->share_conf, 3615 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) 3616 fp->is_persistent = true; 3617 else 3618 fp->is_durable = true; 3619 3620 if (dh_info.type == DURABLE_REQ_V2) { 3621 memcpy(fp->create_guid, dh_info.CreateGuid, 3622 SMB2_CREATE_GUID_SIZE); 3623 if (dh_info.timeout) 3624 fp->durable_timeout = 3625 min_t(unsigned int, dh_info.timeout, 3626 DURABLE_HANDLE_MAX_TIMEOUT); 3627 else 3628 fp->durable_timeout = 60; 3629 } 3630 } 3631 3632 reconnected_fp: 3633 rsp->StructureSize = cpu_to_le16(89); 3634 opinfo = opinfo_get(fp); 3635 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3636 rsp->Flags = 0; 3637 rsp->CreateAction = cpu_to_le32(file_info); 3638 rsp->CreationTime = cpu_to_le64(fp->create_time); 3639 time = ksmbd_UnixTimeToNT(stat.atime); 3640 rsp->LastAccessTime = cpu_to_le64(time); 3641 time = ksmbd_UnixTimeToNT(stat.mtime); 3642 rsp->LastWriteTime = cpu_to_le64(time); 3643 time = ksmbd_UnixTimeToNT(stat.ctime); 3644 rsp->ChangeTime = cpu_to_le64(time); 3645 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3646 cpu_to_le64(stat.blocks << 9); 3647 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3648 rsp->FileAttributes = fp->f_ci->m_fattr; 3649 3650 rsp->Reserved2 = 0; 3651 3652 rsp->PersistentFileId = fp->persistent_id; 3653 rsp->VolatileFileId = fp->volatile_id; 3654 3655 rsp->CreateContextsOffset = 0; 3656 rsp->CreateContextsLength = 0; 3657 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3658 3659 /* If lease is request send lease context response */ 3660 if (opinfo && opinfo->is_lease) { 3661 struct create_context *lease_ccontext; 3662 3663 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3664 name, opinfo->o_lease->state); 3665 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3666 3667 lease_ccontext = (struct create_context *)rsp->Buffer; 3668 contxt_cnt++; 3669 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3670 le32_add_cpu(&rsp->CreateContextsLength, 3671 conn->vals->create_lease_size); 3672 iov_len += conn->vals->create_lease_size; 3673 next_ptr = &lease_ccontext->Next; 3674 next_off = conn->vals->create_lease_size; 3675 } 3676 opinfo_put(opinfo); 3677 3678 if (maximal_access_ctxt) { 3679 struct create_context *mxac_ccontext; 3680 3681 if (maximal_access == 0) 3682 ksmbd_vfs_query_maximal_access(idmap, 3683 path.dentry, 3684 &maximal_access); 3685 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3686 le32_to_cpu(rsp->CreateContextsLength)); 3687 contxt_cnt++; 3688 create_mxac_rsp_buf(rsp->Buffer + 3689 le32_to_cpu(rsp->CreateContextsLength), 3690 le32_to_cpu(maximal_access)); 3691 le32_add_cpu(&rsp->CreateContextsLength, 3692 conn->vals->create_mxac_size); 3693 iov_len += conn->vals->create_mxac_size; 3694 if (next_ptr) 3695 *next_ptr = cpu_to_le32(next_off); 3696 next_ptr = &mxac_ccontext->Next; 3697 next_off = conn->vals->create_mxac_size; 3698 } 3699 3700 if (query_disk_id) { 3701 struct create_context *disk_id_ccontext; 3702 3703 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3704 le32_to_cpu(rsp->CreateContextsLength)); 3705 contxt_cnt++; 3706 create_disk_id_rsp_buf(rsp->Buffer + 3707 le32_to_cpu(rsp->CreateContextsLength), 3708 stat.ino, tcon->id); 3709 le32_add_cpu(&rsp->CreateContextsLength, 3710 conn->vals->create_disk_id_size); 3711 iov_len += conn->vals->create_disk_id_size; 3712 if (next_ptr) 3713 *next_ptr = cpu_to_le32(next_off); 3714 next_ptr = &disk_id_ccontext->Next; 3715 next_off = conn->vals->create_disk_id_size; 3716 } 3717 3718 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { 3719 struct create_context *durable_ccontext; 3720 3721 durable_ccontext = (struct create_context *)(rsp->Buffer + 3722 le32_to_cpu(rsp->CreateContextsLength)); 3723 contxt_cnt++; 3724 if (dh_info.type == DURABLE_REQ) { 3725 create_durable_rsp_buf(rsp->Buffer + 3726 le32_to_cpu(rsp->CreateContextsLength)); 3727 le32_add_cpu(&rsp->CreateContextsLength, 3728 conn->vals->create_durable_size); 3729 iov_len += conn->vals->create_durable_size; 3730 } else { 3731 create_durable_v2_rsp_buf(rsp->Buffer + 3732 le32_to_cpu(rsp->CreateContextsLength), 3733 fp); 3734 le32_add_cpu(&rsp->CreateContextsLength, 3735 conn->vals->create_durable_v2_size); 3736 iov_len += conn->vals->create_durable_v2_size; 3737 } 3738 3739 if (next_ptr) 3740 *next_ptr = cpu_to_le32(next_off); 3741 next_ptr = &durable_ccontext->Next; 3742 next_off = conn->vals->create_durable_size; 3743 } 3744 3745 if (posix_ctxt) { 3746 contxt_cnt++; 3747 create_posix_rsp_buf(rsp->Buffer + 3748 le32_to_cpu(rsp->CreateContextsLength), 3749 fp); 3750 le32_add_cpu(&rsp->CreateContextsLength, 3751 conn->vals->create_posix_size); 3752 iov_len += conn->vals->create_posix_size; 3753 if (next_ptr) 3754 *next_ptr = cpu_to_le32(next_off); 3755 } 3756 3757 if (contxt_cnt > 0) { 3758 rsp->CreateContextsOffset = 3759 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3760 } 3761 3762 err_out: 3763 if (rc && (file_present || created)) 3764 path_put(&path); 3765 3766 err_out1: 3767 ksmbd_revert_fsids(work); 3768 3769 err_out2: 3770 if (!rc) { 3771 rc = ksmbd_update_fstate(&work->sess->file_table, fp, 3772 FP_INITED); 3773 if (!rc) 3774 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3775 } 3776 if (rc) { 3777 if (rc == -EINVAL) 3778 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3779 else if (rc == -EOPNOTSUPP) 3780 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3781 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3782 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3783 else if (rc == -ENOENT) 3784 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3785 else if (rc == -EPERM) 3786 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3787 else if (rc == -EBUSY) 3788 rsp->hdr.Status = STATUS_DELETE_PENDING; 3789 else if (rc == -EBADF) 3790 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3791 else if (rc == -ENOEXEC) 3792 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3793 else if (rc == -ENXIO) 3794 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3795 else if (rc == -EEXIST) 3796 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3797 else if (rc == -EMFILE) 3798 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3799 if (!rsp->hdr.Status) 3800 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3801 3802 if (fp) 3803 ksmbd_fd_put(work, fp); 3804 smb2_set_err_rsp(work); 3805 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3806 } 3807 3808 if (dh_info.reconnected) { 3809 /* 3810 * If reconnect succeeded, fp was republished in the 3811 * session file table. On a later error, ksmbd_fd_put() 3812 * above drops the session reference; drop the durable 3813 * lookup reference through the same session-aware path so 3814 * final close removes the volatile id before freeing fp. 3815 */ 3816 if (rc && fp == dh_info.fp) 3817 ksmbd_fd_put(work, dh_info.fp); 3818 else 3819 ksmbd_put_durable_fd(dh_info.fp); 3820 } 3821 3822 kfree(name); 3823 kfree(lc); 3824 3825 return rc; 3826 } 3827 3828 static int readdir_info_level_struct_sz(int info_level) 3829 { 3830 switch (info_level) { 3831 case FILE_FULL_DIRECTORY_INFORMATION: 3832 return sizeof(FILE_FULL_DIRECTORY_INFO); 3833 case FILE_BOTH_DIRECTORY_INFORMATION: 3834 return sizeof(FILE_BOTH_DIRECTORY_INFO); 3835 case FILE_DIRECTORY_INFORMATION: 3836 return sizeof(FILE_DIRECTORY_INFO); 3837 case FILE_NAMES_INFORMATION: 3838 return sizeof(struct file_names_info); 3839 case FILEID_FULL_DIRECTORY_INFORMATION: 3840 return sizeof(FILE_ID_FULL_DIR_INFO); 3841 case FILEID_BOTH_DIRECTORY_INFORMATION: 3842 return sizeof(struct file_id_both_directory_info); 3843 case SMB_FIND_FILE_POSIX_INFO: 3844 return sizeof(struct smb2_posix_info); 3845 default: 3846 return -EOPNOTSUPP; 3847 } 3848 } 3849 3850 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3851 { 3852 switch (info_level) { 3853 case FILE_FULL_DIRECTORY_INFORMATION: 3854 { 3855 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3856 3857 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->rptr; 3858 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3859 d_info->name = ffdinfo->FileName; 3860 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3861 return 0; 3862 } 3863 case FILE_BOTH_DIRECTORY_INFORMATION: 3864 { 3865 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 3866 3867 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->rptr; 3868 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3869 d_info->name = fbdinfo->FileName; 3870 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3871 return 0; 3872 } 3873 case FILE_DIRECTORY_INFORMATION: 3874 { 3875 FILE_DIRECTORY_INFO *fdinfo; 3876 3877 fdinfo = (FILE_DIRECTORY_INFO *)d_info->rptr; 3878 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3879 d_info->name = fdinfo->FileName; 3880 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3881 return 0; 3882 } 3883 case FILE_NAMES_INFORMATION: 3884 { 3885 struct file_names_info *fninfo; 3886 3887 fninfo = (struct file_names_info *)d_info->rptr; 3888 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3889 d_info->name = fninfo->FileName; 3890 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3891 return 0; 3892 } 3893 case FILEID_FULL_DIRECTORY_INFORMATION: 3894 { 3895 FILE_ID_FULL_DIR_INFO *dinfo; 3896 3897 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->rptr; 3898 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3899 d_info->name = dinfo->FileName; 3900 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3901 return 0; 3902 } 3903 case FILEID_BOTH_DIRECTORY_INFORMATION: 3904 { 3905 struct file_id_both_directory_info *fibdinfo; 3906 3907 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3908 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3909 d_info->name = fibdinfo->FileName; 3910 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3911 return 0; 3912 } 3913 case SMB_FIND_FILE_POSIX_INFO: 3914 { 3915 struct smb2_posix_info *posix_info; 3916 3917 posix_info = (struct smb2_posix_info *)d_info->rptr; 3918 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3919 d_info->name = posix_info->name; 3920 d_info->name_len = le32_to_cpu(posix_info->name_len); 3921 return 0; 3922 } 3923 default: 3924 return -EINVAL; 3925 } 3926 } 3927 3928 /** 3929 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3930 * buffer 3931 * @conn: connection instance 3932 * @info_level: smb information level 3933 * @d_info: structure included variables for query dir 3934 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3935 * 3936 * if directory has many entries, find first can't read it fully. 3937 * find next might be called multiple times to read remaining dir entries 3938 * 3939 * Return: 0 on success, otherwise error 3940 */ 3941 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3942 struct ksmbd_dir_info *d_info, 3943 struct ksmbd_kstat *ksmbd_kstat) 3944 { 3945 int next_entry_offset = 0; 3946 char *conv_name; 3947 int conv_len; 3948 void *kstat; 3949 int struct_sz, rc = 0; 3950 3951 conv_name = ksmbd_convert_dir_info_name(d_info, 3952 conn->local_nls, 3953 &conv_len); 3954 if (!conv_name) 3955 return -ENOMEM; 3956 3957 /* Somehow the name has only terminating NULL bytes */ 3958 if (conv_len < 0) { 3959 rc = -EINVAL; 3960 goto free_conv_name; 3961 } 3962 3963 struct_sz = readdir_info_level_struct_sz(info_level); 3964 if (struct_sz == -EOPNOTSUPP) { 3965 rc = -EINVAL; 3966 goto free_conv_name; 3967 } 3968 3969 struct_sz += conv_len; 3970 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3971 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3972 3973 if (next_entry_offset > d_info->out_buf_len) { 3974 d_info->out_buf_len = 0; 3975 rc = -ENOSPC; 3976 goto free_conv_name; 3977 } 3978 3979 kstat = d_info->wptr; 3980 if (info_level != FILE_NAMES_INFORMATION) 3981 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3982 3983 switch (info_level) { 3984 case FILE_FULL_DIRECTORY_INFORMATION: 3985 { 3986 FILE_FULL_DIRECTORY_INFO *ffdinfo; 3987 3988 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)kstat; 3989 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3990 ffdinfo->EaSize = 3991 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3992 if (ffdinfo->EaSize) 3993 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3994 if (d_info->hide_dot_file && d_info->name[0] == '.') 3995 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3996 memcpy(ffdinfo->FileName, conv_name, conv_len); 3997 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3998 break; 3999 } 4000 case FILE_BOTH_DIRECTORY_INFORMATION: 4001 { 4002 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 4003 4004 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)kstat; 4005 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 4006 fbdinfo->EaSize = 4007 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4008 if (fbdinfo->EaSize) 4009 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4010 fbdinfo->ShortNameLength = 0; 4011 fbdinfo->Reserved = 0; 4012 if (d_info->hide_dot_file && d_info->name[0] == '.') 4013 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4014 memcpy(fbdinfo->FileName, conv_name, conv_len); 4015 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4016 break; 4017 } 4018 case FILE_DIRECTORY_INFORMATION: 4019 { 4020 FILE_DIRECTORY_INFO *fdinfo; 4021 4022 fdinfo = (FILE_DIRECTORY_INFO *)kstat; 4023 fdinfo->FileNameLength = cpu_to_le32(conv_len); 4024 if (d_info->hide_dot_file && d_info->name[0] == '.') 4025 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4026 memcpy(fdinfo->FileName, conv_name, conv_len); 4027 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4028 break; 4029 } 4030 case FILE_NAMES_INFORMATION: 4031 { 4032 struct file_names_info *fninfo; 4033 4034 fninfo = (struct file_names_info *)kstat; 4035 fninfo->FileNameLength = cpu_to_le32(conv_len); 4036 memcpy(fninfo->FileName, conv_name, conv_len); 4037 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4038 break; 4039 } 4040 case FILEID_FULL_DIRECTORY_INFORMATION: 4041 { 4042 FILE_ID_FULL_DIR_INFO *dinfo; 4043 4044 dinfo = (FILE_ID_FULL_DIR_INFO *)kstat; 4045 dinfo->FileNameLength = cpu_to_le32(conv_len); 4046 dinfo->EaSize = 4047 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4048 if (dinfo->EaSize) 4049 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4050 dinfo->Reserved = 0; 4051 if (conn->is_aapl) 4052 dinfo->UniqueId = 0; 4053 else 4054 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4055 if (d_info->hide_dot_file && d_info->name[0] == '.') 4056 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4057 memcpy(dinfo->FileName, conv_name, conv_len); 4058 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4059 break; 4060 } 4061 case FILEID_BOTH_DIRECTORY_INFORMATION: 4062 { 4063 struct file_id_both_directory_info *fibdinfo; 4064 4065 fibdinfo = (struct file_id_both_directory_info *)kstat; 4066 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 4067 fibdinfo->EaSize = 4068 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 4069 if (fibdinfo->EaSize) 4070 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 4071 if (conn->is_aapl) 4072 fibdinfo->UniqueId = 0; 4073 else 4074 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 4075 fibdinfo->ShortNameLength = 0; 4076 fibdinfo->Reserved = 0; 4077 fibdinfo->Reserved2 = cpu_to_le16(0); 4078 if (d_info->hide_dot_file && d_info->name[0] == '.') 4079 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4080 memcpy(fibdinfo->FileName, conv_name, conv_len); 4081 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4082 break; 4083 } 4084 case SMB_FIND_FILE_POSIX_INFO: 4085 { 4086 struct smb2_posix_info *posix_info; 4087 u64 time; 4088 4089 posix_info = (struct smb2_posix_info *)kstat; 4090 posix_info->Ignored = 0; 4091 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 4092 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 4093 posix_info->ChangeTime = cpu_to_le64(time); 4094 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 4095 posix_info->LastAccessTime = cpu_to_le64(time); 4096 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 4097 posix_info->LastWriteTime = cpu_to_le64(time); 4098 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 4099 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 4100 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 4101 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 4102 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 4103 switch (ksmbd_kstat->kstat->mode & S_IFMT) { 4104 case S_IFDIR: 4105 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 4106 break; 4107 case S_IFLNK: 4108 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 4109 break; 4110 case S_IFCHR: 4111 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 4112 break; 4113 case S_IFBLK: 4114 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 4115 break; 4116 case S_IFIFO: 4117 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 4118 break; 4119 case S_IFSOCK: 4120 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 4121 } 4122 4123 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 4124 posix_info->DosAttributes = 4125 S_ISDIR(ksmbd_kstat->kstat->mode) ? 4126 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 4127 if (d_info->hide_dot_file && d_info->name[0] == '.') 4128 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 4129 /* 4130 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4131 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4132 * sub_auth(4 * 1(num_subauth)) + RID(4). 4133 */ 4134 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 4135 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 4136 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 4137 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 4138 memcpy(posix_info->name, conv_name, conv_len); 4139 posix_info->name_len = cpu_to_le32(conv_len); 4140 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 4141 break; 4142 } 4143 4144 } /* switch (info_level) */ 4145 4146 d_info->last_entry_offset = d_info->data_count; 4147 d_info->data_count += next_entry_offset; 4148 d_info->out_buf_len -= next_entry_offset; 4149 d_info->wptr += next_entry_offset; 4150 4151 ksmbd_debug(SMB, 4152 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 4153 info_level, d_info->out_buf_len, 4154 next_entry_offset, d_info->data_count); 4155 4156 free_conv_name: 4157 kfree(conv_name); 4158 return rc; 4159 } 4160 4161 struct smb2_query_dir_private { 4162 struct ksmbd_work *work; 4163 char *search_pattern; 4164 struct ksmbd_file *dir_fp; 4165 4166 struct ksmbd_dir_info *d_info; 4167 int info_level; 4168 }; 4169 4170 static int process_query_dir_entries(struct smb2_query_dir_private *priv) 4171 { 4172 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 4173 struct kstat kstat; 4174 struct ksmbd_kstat ksmbd_kstat; 4175 int rc; 4176 int i; 4177 4178 for (i = 0; i < priv->d_info->num_entry; i++) { 4179 struct dentry *dent; 4180 4181 if (dentry_name(priv->d_info, priv->info_level)) 4182 return -EINVAL; 4183 4184 dent = lookup_one_unlocked(idmap, 4185 &QSTR_LEN(priv->d_info->name, 4186 priv->d_info->name_len), 4187 priv->dir_fp->filp->f_path.dentry); 4188 4189 if (IS_ERR(dent)) { 4190 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 4191 priv->d_info->name, 4192 PTR_ERR(dent)); 4193 continue; 4194 } 4195 if (unlikely(d_is_negative(dent))) { 4196 dput(dent); 4197 ksmbd_debug(SMB, "Negative dentry `%s'\n", 4198 priv->d_info->name); 4199 continue; 4200 } 4201 4202 ksmbd_kstat.kstat = &kstat; 4203 if (priv->info_level != FILE_NAMES_INFORMATION) { 4204 rc = ksmbd_vfs_fill_dentry_attrs(priv->work, 4205 idmap, 4206 dent, 4207 &ksmbd_kstat); 4208 if (rc) { 4209 dput(dent); 4210 continue; 4211 } 4212 } 4213 4214 rc = smb2_populate_readdir_entry(priv->work->conn, 4215 priv->info_level, 4216 priv->d_info, 4217 &ksmbd_kstat); 4218 dput(dent); 4219 if (rc) 4220 return rc; 4221 } 4222 return 0; 4223 } 4224 4225 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 4226 int info_level) 4227 { 4228 int struct_sz; 4229 int conv_len; 4230 int next_entry_offset; 4231 4232 struct_sz = readdir_info_level_struct_sz(info_level); 4233 if (struct_sz == -EOPNOTSUPP) 4234 return -EOPNOTSUPP; 4235 4236 conv_len = (d_info->name_len + 1) * 2; 4237 next_entry_offset = ALIGN(struct_sz + conv_len, 4238 KSMBD_DIR_INFO_ALIGNMENT); 4239 4240 if (next_entry_offset > d_info->out_buf_len) { 4241 d_info->out_buf_len = 0; 4242 return -ENOSPC; 4243 } 4244 4245 switch (info_level) { 4246 case FILE_FULL_DIRECTORY_INFORMATION: 4247 { 4248 FILE_FULL_DIRECTORY_INFO *ffdinfo; 4249 4250 ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->wptr; 4251 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 4252 ffdinfo->FileName[d_info->name_len] = 0x00; 4253 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4254 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4255 break; 4256 } 4257 case FILE_BOTH_DIRECTORY_INFORMATION: 4258 { 4259 FILE_BOTH_DIRECTORY_INFO *fbdinfo; 4260 4261 fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->wptr; 4262 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 4263 fbdinfo->FileName[d_info->name_len] = 0x00; 4264 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4265 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4266 break; 4267 } 4268 case FILE_DIRECTORY_INFORMATION: 4269 { 4270 FILE_DIRECTORY_INFO *fdinfo; 4271 4272 fdinfo = (FILE_DIRECTORY_INFO *)d_info->wptr; 4273 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 4274 fdinfo->FileName[d_info->name_len] = 0x00; 4275 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4276 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4277 break; 4278 } 4279 case FILE_NAMES_INFORMATION: 4280 { 4281 struct file_names_info *fninfo; 4282 4283 fninfo = (struct file_names_info *)d_info->wptr; 4284 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 4285 fninfo->FileName[d_info->name_len] = 0x00; 4286 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 4287 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4288 break; 4289 } 4290 case FILEID_FULL_DIRECTORY_INFORMATION: 4291 { 4292 FILE_ID_FULL_DIR_INFO *dinfo; 4293 4294 dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->wptr; 4295 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 4296 dinfo->FileName[d_info->name_len] = 0x00; 4297 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4298 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4299 break; 4300 } 4301 case FILEID_BOTH_DIRECTORY_INFORMATION: 4302 { 4303 struct file_id_both_directory_info *fibdinfo; 4304 4305 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 4306 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 4307 fibdinfo->FileName[d_info->name_len] = 0x00; 4308 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 4309 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 4310 break; 4311 } 4312 case SMB_FIND_FILE_POSIX_INFO: 4313 { 4314 struct smb2_posix_info *posix_info; 4315 4316 posix_info = (struct smb2_posix_info *)d_info->wptr; 4317 memcpy(posix_info->name, d_info->name, d_info->name_len); 4318 posix_info->name[d_info->name_len] = 0x00; 4319 posix_info->name_len = cpu_to_le32(d_info->name_len); 4320 posix_info->NextEntryOffset = 4321 cpu_to_le32(next_entry_offset); 4322 break; 4323 } 4324 } /* switch (info_level) */ 4325 4326 d_info->num_entry++; 4327 d_info->out_buf_len -= next_entry_offset; 4328 d_info->wptr += next_entry_offset; 4329 return 0; 4330 } 4331 4332 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 4333 loff_t offset, u64 ino, unsigned int d_type) 4334 { 4335 struct ksmbd_readdir_data *buf; 4336 struct smb2_query_dir_private *priv; 4337 struct ksmbd_dir_info *d_info; 4338 int rc; 4339 4340 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 4341 priv = buf->private; 4342 d_info = priv->d_info; 4343 4344 /* dot and dotdot entries are already reserved */ 4345 if (!strcmp(".", name) || !strcmp("..", name)) 4346 return true; 4347 d_info->num_scan++; 4348 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 4349 return true; 4350 if (!match_pattern(name, namlen, priv->search_pattern)) 4351 return true; 4352 4353 d_info->name = name; 4354 d_info->name_len = namlen; 4355 rc = reserve_populate_dentry(d_info, priv->info_level); 4356 if (rc) 4357 return false; 4358 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 4359 d_info->out_buf_len = 0; 4360 return true; 4361 } 4362 4363 static int verify_info_level(int info_level) 4364 { 4365 switch (info_level) { 4366 case FILE_FULL_DIRECTORY_INFORMATION: 4367 case FILE_BOTH_DIRECTORY_INFORMATION: 4368 case FILE_DIRECTORY_INFORMATION: 4369 case FILE_NAMES_INFORMATION: 4370 case FILEID_FULL_DIRECTORY_INFORMATION: 4371 case FILEID_BOTH_DIRECTORY_INFORMATION: 4372 case SMB_FIND_FILE_POSIX_INFO: 4373 break; 4374 default: 4375 return -EOPNOTSUPP; 4376 } 4377 4378 return 0; 4379 } 4380 4381 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4382 { 4383 int free_len; 4384 4385 free_len = (int)(work->response_sz - 4386 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4387 return free_len; 4388 } 4389 4390 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4391 unsigned short hdr2_len, 4392 unsigned int out_buf_len) 4393 { 4394 int free_len; 4395 4396 if (out_buf_len > work->conn->vals->max_trans_size) 4397 return -EINVAL; 4398 4399 free_len = smb2_resp_buf_len(work, hdr2_len); 4400 if (free_len < 0) 4401 return -EINVAL; 4402 4403 return min_t(int, out_buf_len, free_len); 4404 } 4405 4406 int smb2_query_dir(struct ksmbd_work *work) 4407 { 4408 struct ksmbd_conn *conn = work->conn; 4409 struct smb2_query_directory_req *req; 4410 struct smb2_query_directory_rsp *rsp; 4411 struct ksmbd_share_config *share = work->tcon->share_conf; 4412 struct ksmbd_file *dir_fp = NULL; 4413 struct ksmbd_dir_info d_info; 4414 int rc = 0; 4415 char *srch_ptr = NULL; 4416 unsigned char srch_flag; 4417 int buffer_sz; 4418 struct smb2_query_dir_private query_dir_private = {NULL, }; 4419 4420 ksmbd_debug(SMB, "Received smb2 query directory request\n"); 4421 4422 WORK_BUFFERS(work, req, rsp); 4423 4424 if (ksmbd_override_fsids(work)) { 4425 rsp->hdr.Status = STATUS_NO_MEMORY; 4426 smb2_set_err_rsp(work); 4427 return -ENOMEM; 4428 } 4429 4430 rc = verify_info_level(req->FileInformationClass); 4431 if (rc) { 4432 rc = -EFAULT; 4433 goto err_out2; 4434 } 4435 4436 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4437 if (!dir_fp) { 4438 rc = -EBADF; 4439 goto err_out2; 4440 } 4441 4442 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4443 inode_permission(file_mnt_idmap(dir_fp->filp), 4444 file_inode(dir_fp->filp), 4445 MAY_READ | MAY_EXEC)) { 4446 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4447 rc = -EACCES; 4448 goto err_out2; 4449 } 4450 4451 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4452 pr_err("can't do query dir for a file\n"); 4453 rc = -EINVAL; 4454 goto err_out2; 4455 } 4456 4457 srch_flag = req->Flags; 4458 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), 4459 le16_to_cpu(req->FileNameLength), 1, 4460 conn->local_nls); 4461 if (IS_ERR(srch_ptr)) { 4462 ksmbd_debug(SMB, "Search Pattern not found\n"); 4463 rc = -EINVAL; 4464 goto err_out2; 4465 } else { 4466 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4467 } 4468 4469 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4470 ksmbd_debug(SMB, "Restart directory scan\n"); 4471 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4472 } 4473 4474 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4475 d_info.wptr = (char *)rsp->Buffer; 4476 d_info.rptr = (char *)rsp->Buffer; 4477 d_info.out_buf_len = 4478 smb2_calc_max_out_buf_len(work, 4479 offsetof(struct smb2_query_directory_rsp, Buffer), 4480 le32_to_cpu(req->OutputBufferLength)); 4481 if (d_info.out_buf_len < 0) { 4482 rc = -EINVAL; 4483 goto err_out; 4484 } 4485 d_info.flags = srch_flag; 4486 4487 /* 4488 * reserve dot and dotdot entries in head of buffer 4489 * in first response 4490 */ 4491 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4492 dir_fp, &d_info, srch_ptr, 4493 smb2_populate_readdir_entry); 4494 if (rc == -ENOSPC) 4495 rc = 0; 4496 else if (rc) 4497 goto err_out; 4498 4499 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4500 d_info.hide_dot_file = true; 4501 4502 buffer_sz = d_info.out_buf_len; 4503 d_info.rptr = d_info.wptr; 4504 query_dir_private.work = work; 4505 query_dir_private.search_pattern = srch_ptr; 4506 query_dir_private.dir_fp = dir_fp; 4507 query_dir_private.d_info = &d_info; 4508 query_dir_private.info_level = req->FileInformationClass; 4509 dir_fp->readdir_data.private = &query_dir_private; 4510 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4511 again: 4512 d_info.num_scan = 0; 4513 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4514 /* 4515 * num_entry can be 0 if the directory iteration stops before reaching 4516 * the end of the directory and no file is matched with the search 4517 * pattern. 4518 */ 4519 if (rc >= 0 && !d_info.num_entry && d_info.num_scan && 4520 d_info.out_buf_len > 0) 4521 goto again; 4522 /* 4523 * req->OutputBufferLength is too small to contain even one entry. 4524 * In this case, it immediately returns OutputBufferLength 0 to client. 4525 */ 4526 if (!d_info.out_buf_len && !d_info.num_entry) 4527 goto no_buf_len; 4528 if (rc > 0 || rc == -ENOSPC) 4529 rc = 0; 4530 else if (rc) 4531 goto err_out; 4532 4533 d_info.wptr = d_info.rptr; 4534 d_info.out_buf_len = buffer_sz; 4535 rc = process_query_dir_entries(&query_dir_private); 4536 if (rc) 4537 goto err_out; 4538 4539 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4540 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4541 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4542 } else { 4543 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4544 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4545 } 4546 rsp->StructureSize = cpu_to_le16(9); 4547 rsp->OutputBufferOffset = cpu_to_le16(0); 4548 rsp->OutputBufferLength = cpu_to_le32(0); 4549 rsp->Buffer[0] = 0; 4550 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4551 offsetof(struct smb2_query_directory_rsp, Buffer) 4552 + 1); 4553 if (rc) 4554 goto err_out; 4555 } else { 4556 no_buf_len: 4557 ((FILE_DIRECTORY_INFO *) 4558 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4559 ->NextEntryOffset = 0; 4560 if (d_info.data_count >= d_info.last_entry_off_align) 4561 d_info.data_count -= d_info.last_entry_off_align; 4562 4563 rsp->StructureSize = cpu_to_le16(9); 4564 rsp->OutputBufferOffset = cpu_to_le16(72); 4565 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4566 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4567 offsetof(struct smb2_query_directory_rsp, Buffer) + 4568 d_info.data_count); 4569 if (rc) 4570 goto err_out; 4571 } 4572 4573 kfree(srch_ptr); 4574 ksmbd_fd_put(work, dir_fp); 4575 ksmbd_revert_fsids(work); 4576 return 0; 4577 4578 err_out: 4579 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4580 kfree(srch_ptr); 4581 4582 err_out2: 4583 if (rc == -EINVAL) 4584 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4585 else if (rc == -EACCES) 4586 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4587 else if (rc == -ENOENT) 4588 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4589 else if (rc == -EBADF) 4590 rsp->hdr.Status = STATUS_FILE_CLOSED; 4591 else if (rc == -ENOMEM) 4592 rsp->hdr.Status = STATUS_NO_MEMORY; 4593 else if (rc == -EFAULT) 4594 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4595 else if (rc == -EIO) 4596 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4597 if (!rsp->hdr.Status) 4598 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4599 4600 smb2_set_err_rsp(work); 4601 ksmbd_fd_put(work, dir_fp); 4602 ksmbd_revert_fsids(work); 4603 return rc; 4604 } 4605 4606 /** 4607 * buffer_check_err() - helper function to check buffer errors 4608 * @reqOutputBufferLength: max buffer length expected in command response 4609 * @rsp: query info response buffer contains output buffer length 4610 * @rsp_org: base response buffer pointer in case of chained response 4611 * 4612 * Return: 0 on success, otherwise error 4613 */ 4614 static int buffer_check_err(int reqOutputBufferLength, 4615 struct smb2_query_info_rsp *rsp, 4616 void *rsp_org) 4617 { 4618 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4619 pr_err("Invalid Buffer Size Requested\n"); 4620 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4621 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4622 return -EINVAL; 4623 } 4624 return 0; 4625 } 4626 4627 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4628 void *rsp_org) 4629 { 4630 struct smb2_file_standard_info *sinfo; 4631 4632 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4633 4634 sinfo->AllocationSize = cpu_to_le64(4096); 4635 sinfo->EndOfFile = cpu_to_le64(0); 4636 sinfo->NumberOfLinks = cpu_to_le32(1); 4637 sinfo->DeletePending = 1; 4638 sinfo->Directory = 0; 4639 rsp->OutputBufferLength = 4640 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4641 } 4642 4643 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4644 void *rsp_org) 4645 { 4646 struct smb2_file_internal_info *file_info; 4647 4648 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4649 4650 /* any unique number */ 4651 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4652 rsp->OutputBufferLength = 4653 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4654 } 4655 4656 static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4657 struct smb2_query_info_req *req, 4658 struct smb2_query_info_rsp *rsp, 4659 void *rsp_org) 4660 { 4661 u64 id; 4662 int rc; 4663 4664 /* 4665 * Windows can sometime send query file info request on 4666 * pipe without opening it, checking error condition here 4667 */ 4668 id = req->VolatileFileId; 4669 4670 lockdep_assert_not_held(&sess->rpc_lock); 4671 4672 down_read(&sess->rpc_lock); 4673 if (!ksmbd_session_rpc_method(sess, id)) { 4674 up_read(&sess->rpc_lock); 4675 return -ENOENT; 4676 } 4677 up_read(&sess->rpc_lock); 4678 4679 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4680 req->FileInfoClass, req->VolatileFileId); 4681 4682 switch (req->FileInfoClass) { 4683 case FILE_STANDARD_INFORMATION: 4684 get_standard_info_pipe(rsp, rsp_org); 4685 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4686 rsp, rsp_org); 4687 break; 4688 case FILE_INTERNAL_INFORMATION: 4689 get_internal_info_pipe(rsp, id, rsp_org); 4690 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4691 rsp, rsp_org); 4692 break; 4693 default: 4694 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4695 req->FileInfoClass); 4696 rc = -EOPNOTSUPP; 4697 } 4698 return rc; 4699 } 4700 4701 /** 4702 * smb2_get_ea() - handler for smb2 get extended attribute command 4703 * @work: smb work containing query info command buffer 4704 * @fp: ksmbd_file pointer 4705 * @req: get extended attribute request 4706 * @rsp: response buffer pointer 4707 * @rsp_org: base response buffer pointer in case of chained response 4708 * 4709 * Return: 0 on success, otherwise error 4710 */ 4711 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4712 struct smb2_query_info_req *req, 4713 struct smb2_query_info_rsp *rsp, void *rsp_org) 4714 { 4715 struct smb2_ea_info *eainfo, *prev_eainfo; 4716 char *name, *ptr, *xattr_list = NULL, *buf; 4717 int rc, name_len, value_len, xattr_list_len, idx; 4718 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4719 struct smb2_ea_info_req *ea_req = NULL; 4720 const struct path *path; 4721 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4722 4723 if (!(fp->daccess & FILE_READ_EA_LE)) { 4724 pr_err("Not permitted to read ext attr : 0x%x\n", 4725 fp->daccess); 4726 return -EACCES; 4727 } 4728 4729 path = &fp->filp->f_path; 4730 /* single EA entry is requested with given user.* name */ 4731 if (req->InputBufferLength) { 4732 if (le32_to_cpu(req->InputBufferLength) <= 4733 sizeof(struct smb2_ea_info_req)) 4734 return -EINVAL; 4735 4736 ea_req = (struct smb2_ea_info_req *)((char *)req + 4737 le16_to_cpu(req->InputBufferOffset)); 4738 4739 if (le32_to_cpu(req->InputBufferLength) < 4740 offsetof(struct smb2_ea_info_req, name) + 4741 ea_req->EaNameLength) 4742 return -EINVAL; 4743 } else { 4744 /* need to send all EAs, if no specific EA is requested*/ 4745 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4746 ksmbd_debug(SMB, 4747 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4748 le32_to_cpu(req->Flags)); 4749 } 4750 4751 buf_free_len = 4752 smb2_calc_max_out_buf_len(work, 4753 offsetof(struct smb2_query_info_rsp, Buffer), 4754 le32_to_cpu(req->OutputBufferLength)); 4755 if (buf_free_len < 0) 4756 return -EINVAL; 4757 4758 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4759 if (rc < 0) { 4760 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4761 goto out; 4762 } else if (!rc) { /* there is no EA in the file */ 4763 ksmbd_debug(SMB, "no ea data in the file\n"); 4764 goto done; 4765 } 4766 xattr_list_len = rc; 4767 4768 ptr = (char *)rsp->Buffer; 4769 eainfo = (struct smb2_ea_info *)ptr; 4770 prev_eainfo = eainfo; 4771 idx = 0; 4772 4773 while (idx < xattr_list_len) { 4774 name = xattr_list + idx; 4775 name_len = strlen(name); 4776 4777 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4778 idx += name_len + 1; 4779 4780 /* 4781 * CIFS does not support EA other than user.* namespace, 4782 * still keep the framework generic, to list other attrs 4783 * in future. 4784 */ 4785 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4786 continue; 4787 4788 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4789 STREAM_PREFIX_LEN)) 4790 continue; 4791 4792 if (req->InputBufferLength && 4793 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4794 ea_req->EaNameLength)) 4795 continue; 4796 4797 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4798 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4799 continue; 4800 4801 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4802 name_len -= XATTR_USER_PREFIX_LEN; 4803 4804 ptr = eainfo->name + name_len + 1; 4805 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4806 name_len + 1); 4807 /* bailout if xattr can't fit in buf_free_len */ 4808 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4809 name, &buf); 4810 if (value_len <= 0) { 4811 rc = -ENOENT; 4812 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4813 goto out; 4814 } 4815 4816 buf_free_len -= value_len; 4817 if (buf_free_len < 0) { 4818 kfree(buf); 4819 break; 4820 } 4821 4822 memcpy(ptr, buf, value_len); 4823 kfree(buf); 4824 4825 ptr += value_len; 4826 eainfo->Flags = 0; 4827 eainfo->EaNameLength = name_len; 4828 4829 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4830 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4831 name_len); 4832 else 4833 memcpy(eainfo->name, name, name_len); 4834 4835 eainfo->name[name_len] = '\0'; 4836 eainfo->EaValueLength = cpu_to_le16(value_len); 4837 next_offset = offsetof(struct smb2_ea_info, name) + 4838 name_len + 1 + value_len; 4839 4840 /* align next xattr entry at 4 byte bundary */ 4841 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4842 if (alignment_bytes) { 4843 if (buf_free_len < alignment_bytes) 4844 break; 4845 memset(ptr, '\0', alignment_bytes); 4846 ptr += alignment_bytes; 4847 next_offset += alignment_bytes; 4848 buf_free_len -= alignment_bytes; 4849 } 4850 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4851 prev_eainfo = eainfo; 4852 eainfo = (struct smb2_ea_info *)ptr; 4853 rsp_data_cnt += next_offset; 4854 4855 if (req->InputBufferLength) { 4856 ksmbd_debug(SMB, "single entry requested\n"); 4857 break; 4858 } 4859 } 4860 4861 /* no more ea entries */ 4862 prev_eainfo->NextEntryOffset = 0; 4863 done: 4864 rc = 0; 4865 if (rsp_data_cnt == 0) 4866 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4867 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4868 out: 4869 kvfree(xattr_list); 4870 return rc; 4871 } 4872 4873 static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4874 struct ksmbd_file *fp, void *rsp_org) 4875 { 4876 struct smb2_file_access_info *file_info; 4877 4878 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4879 file_info->AccessFlags = fp->daccess; 4880 rsp->OutputBufferLength = 4881 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4882 } 4883 4884 static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4885 struct ksmbd_file *fp, void *rsp_org) 4886 { 4887 struct file_basic_info *basic_info; 4888 struct kstat stat; 4889 u64 time; 4890 int ret; 4891 4892 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4893 pr_err("no right to read the attributes : 0x%x\n", 4894 fp->daccess); 4895 return -EACCES; 4896 } 4897 4898 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4899 AT_STATX_SYNC_AS_STAT); 4900 if (ret) 4901 return ret; 4902 4903 basic_info = (struct file_basic_info *)rsp->Buffer; 4904 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4905 time = ksmbd_UnixTimeToNT(stat.atime); 4906 basic_info->LastAccessTime = cpu_to_le64(time); 4907 time = ksmbd_UnixTimeToNT(stat.mtime); 4908 basic_info->LastWriteTime = cpu_to_le64(time); 4909 time = ksmbd_UnixTimeToNT(stat.ctime); 4910 basic_info->ChangeTime = cpu_to_le64(time); 4911 basic_info->Attributes = fp->f_ci->m_fattr; 4912 basic_info->Pad = 0; 4913 rsp->OutputBufferLength = 4914 cpu_to_le32(sizeof(struct file_basic_info)); 4915 return 0; 4916 } 4917 4918 static int get_file_standard_info(struct smb2_query_info_rsp *rsp, 4919 struct ksmbd_file *fp, void *rsp_org) 4920 { 4921 struct smb2_file_standard_info *sinfo; 4922 unsigned int delete_pending; 4923 struct kstat stat; 4924 int ret; 4925 4926 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4927 AT_STATX_SYNC_AS_STAT); 4928 if (ret) 4929 return ret; 4930 4931 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4932 delete_pending = ksmbd_inode_pending_delete(fp); 4933 4934 if (ksmbd_stream_fd(fp) == false) { 4935 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); 4936 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4937 } else { 4938 sinfo->AllocationSize = cpu_to_le64(fp->stream.size); 4939 sinfo->EndOfFile = cpu_to_le64(fp->stream.size); 4940 } 4941 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4942 sinfo->DeletePending = delete_pending; 4943 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4944 rsp->OutputBufferLength = 4945 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4946 4947 return 0; 4948 } 4949 4950 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4951 void *rsp_org) 4952 { 4953 struct smb2_file_alignment_info *file_info; 4954 4955 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4956 file_info->AlignmentRequirement = 0; 4957 rsp->OutputBufferLength = 4958 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4959 } 4960 4961 static int get_file_all_info(struct ksmbd_work *work, 4962 struct smb2_query_info_rsp *rsp, 4963 struct ksmbd_file *fp, 4964 void *rsp_org) 4965 { 4966 struct ksmbd_conn *conn = work->conn; 4967 struct smb2_file_all_info *file_info; 4968 unsigned int delete_pending; 4969 struct kstat stat; 4970 int conv_len; 4971 char *filename; 4972 u64 time; 4973 int ret, buf_free_len, filename_len; 4974 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4975 4976 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4977 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4978 fp->daccess); 4979 return -EACCES; 4980 } 4981 4982 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4983 if (IS_ERR(filename)) 4984 return PTR_ERR(filename); 4985 4986 filename_len = strlen(filename); 4987 buf_free_len = smb2_calc_max_out_buf_len(work, 4988 offsetof(struct smb2_query_info_rsp, Buffer) + 4989 offsetof(struct smb2_file_all_info, FileName), 4990 le32_to_cpu(req->OutputBufferLength)); 4991 if (buf_free_len < (filename_len + 1) * 2) { 4992 kfree(filename); 4993 return -EINVAL; 4994 } 4995 4996 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 4997 AT_STATX_SYNC_AS_STAT); 4998 if (ret) { 4999 kfree(filename); 5000 return ret; 5001 } 5002 5003 ksmbd_debug(SMB, "filename = %s\n", filename); 5004 delete_pending = ksmbd_inode_pending_delete(fp); 5005 file_info = (struct smb2_file_all_info *)rsp->Buffer; 5006 5007 file_info->CreationTime = cpu_to_le64(fp->create_time); 5008 time = ksmbd_UnixTimeToNT(stat.atime); 5009 file_info->LastAccessTime = cpu_to_le64(time); 5010 time = ksmbd_UnixTimeToNT(stat.mtime); 5011 file_info->LastWriteTime = cpu_to_le64(time); 5012 time = ksmbd_UnixTimeToNT(stat.ctime); 5013 file_info->ChangeTime = cpu_to_le64(time); 5014 file_info->Attributes = fp->f_ci->m_fattr; 5015 file_info->Pad1 = 0; 5016 if (ksmbd_stream_fd(fp) == false) { 5017 file_info->AllocationSize = 5018 cpu_to_le64(stat.blocks << 9); 5019 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5020 } else { 5021 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5022 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5023 } 5024 file_info->NumberOfLinks = 5025 cpu_to_le32(get_nlink(&stat) - delete_pending); 5026 file_info->DeletePending = delete_pending; 5027 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 5028 file_info->Pad2 = 0; 5029 file_info->IndexNumber = cpu_to_le64(stat.ino); 5030 file_info->EASize = 0; 5031 file_info->AccessFlags = fp->daccess; 5032 if (ksmbd_stream_fd(fp) == false) 5033 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5034 else 5035 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5036 file_info->Mode = fp->coption; 5037 file_info->AlignmentRequirement = 0; 5038 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 5039 min(filename_len, PATH_MAX), 5040 conn->local_nls, 0); 5041 conv_len *= 2; 5042 file_info->FileNameLength = cpu_to_le32(conv_len); 5043 rsp->OutputBufferLength = 5044 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 5045 kfree(filename); 5046 return 0; 5047 } 5048 5049 static void get_file_alternate_info(struct ksmbd_work *work, 5050 struct smb2_query_info_rsp *rsp, 5051 struct ksmbd_file *fp, 5052 void *rsp_org) 5053 { 5054 struct ksmbd_conn *conn = work->conn; 5055 struct smb2_file_alt_name_info *file_info; 5056 struct dentry *dentry = fp->filp->f_path.dentry; 5057 int conv_len; 5058 5059 spin_lock(&dentry->d_lock); 5060 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 5061 conv_len = ksmbd_extract_shortname(conn, 5062 dentry->d_name.name, 5063 file_info->FileName); 5064 spin_unlock(&dentry->d_lock); 5065 file_info->FileNameLength = cpu_to_le32(conv_len); 5066 rsp->OutputBufferLength = 5067 cpu_to_le32(struct_size(file_info, FileName, conv_len)); 5068 } 5069 5070 static int get_file_stream_info(struct ksmbd_work *work, 5071 struct smb2_query_info_rsp *rsp, 5072 struct ksmbd_file *fp, 5073 void *rsp_org) 5074 { 5075 struct ksmbd_conn *conn = work->conn; 5076 struct smb2_file_stream_info *file_info; 5077 char *stream_name, *xattr_list = NULL, *stream_buf; 5078 struct kstat stat; 5079 const struct path *path = &fp->filp->f_path; 5080 ssize_t xattr_list_len; 5081 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 5082 int buf_free_len; 5083 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 5084 int ret; 5085 5086 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5087 AT_STATX_SYNC_AS_STAT); 5088 if (ret) 5089 return ret; 5090 5091 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 5092 5093 buf_free_len = 5094 smb2_calc_max_out_buf_len(work, 5095 offsetof(struct smb2_query_info_rsp, Buffer), 5096 le32_to_cpu(req->OutputBufferLength)); 5097 if (buf_free_len < 0) 5098 goto out; 5099 5100 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 5101 if (xattr_list_len < 0) { 5102 goto out; 5103 } else if (!xattr_list_len) { 5104 ksmbd_debug(SMB, "empty xattr in the file\n"); 5105 goto out; 5106 } 5107 5108 while (idx < xattr_list_len) { 5109 stream_name = xattr_list + idx; 5110 streamlen = strlen(stream_name); 5111 idx += streamlen + 1; 5112 5113 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 5114 5115 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 5116 STREAM_PREFIX, STREAM_PREFIX_LEN)) 5117 continue; 5118 5119 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 5120 STREAM_PREFIX_LEN); 5121 streamlen = stream_name_len; 5122 5123 /* plus : size */ 5124 streamlen += 1; 5125 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP); 5126 if (!stream_buf) 5127 break; 5128 5129 streamlen = snprintf(stream_buf, streamlen + 1, 5130 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 5131 5132 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 5133 if (next > buf_free_len) { 5134 kfree(stream_buf); 5135 break; 5136 } 5137 5138 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 5139 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5140 stream_buf, streamlen, 5141 conn->local_nls, 0); 5142 streamlen *= 2; 5143 kfree(stream_buf); 5144 file_info->StreamNameLength = cpu_to_le32(streamlen); 5145 file_info->StreamSize = cpu_to_le64(stream_name_len); 5146 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 5147 5148 nbytes += next; 5149 buf_free_len -= next; 5150 file_info->NextEntryOffset = cpu_to_le32(next); 5151 } 5152 5153 out: 5154 if (!S_ISDIR(stat.mode) && 5155 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 5156 file_info = (struct smb2_file_stream_info *) 5157 &rsp->Buffer[nbytes]; 5158 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 5159 "::$DATA", 7, conn->local_nls, 0); 5160 streamlen *= 2; 5161 file_info->StreamNameLength = cpu_to_le32(streamlen); 5162 file_info->StreamSize = cpu_to_le64(stat.size); 5163 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 5164 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 5165 } 5166 5167 /* last entry offset should be 0 */ 5168 file_info->NextEntryOffset = 0; 5169 kvfree(xattr_list); 5170 5171 rsp->OutputBufferLength = cpu_to_le32(nbytes); 5172 5173 return 0; 5174 } 5175 5176 static int get_file_internal_info(struct smb2_query_info_rsp *rsp, 5177 struct ksmbd_file *fp, void *rsp_org) 5178 { 5179 struct smb2_file_internal_info *file_info; 5180 struct kstat stat; 5181 int ret; 5182 5183 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5184 AT_STATX_SYNC_AS_STAT); 5185 if (ret) 5186 return ret; 5187 5188 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 5189 file_info->IndexNumber = cpu_to_le64(stat.ino); 5190 rsp->OutputBufferLength = 5191 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 5192 5193 return 0; 5194 } 5195 5196 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 5197 struct ksmbd_file *fp, void *rsp_org) 5198 { 5199 struct smb2_file_network_open_info *file_info; 5200 struct kstat stat; 5201 u64 time; 5202 int ret; 5203 5204 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5205 pr_err("no right to read the attributes : 0x%x\n", 5206 fp->daccess); 5207 return -EACCES; 5208 } 5209 5210 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5211 AT_STATX_SYNC_AS_STAT); 5212 if (ret) 5213 return ret; 5214 5215 file_info = (struct smb2_file_network_open_info *)rsp->Buffer; 5216 5217 file_info->CreationTime = cpu_to_le64(fp->create_time); 5218 time = ksmbd_UnixTimeToNT(stat.atime); 5219 file_info->LastAccessTime = cpu_to_le64(time); 5220 time = ksmbd_UnixTimeToNT(stat.mtime); 5221 file_info->LastWriteTime = cpu_to_le64(time); 5222 time = ksmbd_UnixTimeToNT(stat.ctime); 5223 file_info->ChangeTime = cpu_to_le64(time); 5224 file_info->Attributes = fp->f_ci->m_fattr; 5225 if (ksmbd_stream_fd(fp) == false) { 5226 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5227 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 5228 } else { 5229 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5230 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5231 } 5232 file_info->Reserved = cpu_to_le32(0); 5233 rsp->OutputBufferLength = 5234 cpu_to_le32(sizeof(struct smb2_file_network_open_info)); 5235 return 0; 5236 } 5237 5238 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 5239 { 5240 struct smb2_file_ea_info *file_info; 5241 5242 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 5243 file_info->EASize = 0; 5244 rsp->OutputBufferLength = 5245 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 5246 } 5247 5248 static void get_file_position_info(struct smb2_query_info_rsp *rsp, 5249 struct ksmbd_file *fp, void *rsp_org) 5250 { 5251 struct smb2_file_pos_info *file_info; 5252 5253 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 5254 if (ksmbd_stream_fd(fp) == false) 5255 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 5256 else 5257 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); 5258 5259 rsp->OutputBufferLength = 5260 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 5261 } 5262 5263 static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 5264 struct ksmbd_file *fp, void *rsp_org) 5265 { 5266 struct smb2_file_mode_info *file_info; 5267 5268 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 5269 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 5270 rsp->OutputBufferLength = 5271 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 5272 } 5273 5274 static int get_file_compression_info(struct smb2_query_info_rsp *rsp, 5275 struct ksmbd_file *fp, void *rsp_org) 5276 { 5277 struct smb2_file_comp_info *file_info; 5278 struct kstat stat; 5279 int ret; 5280 5281 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5282 AT_STATX_SYNC_AS_STAT); 5283 if (ret) 5284 return ret; 5285 5286 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 5287 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 5288 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 5289 file_info->CompressionUnitShift = 0; 5290 file_info->ChunkShift = 0; 5291 file_info->ClusterShift = 0; 5292 memset(&file_info->Reserved[0], 0, 3); 5293 5294 rsp->OutputBufferLength = 5295 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 5296 5297 return 0; 5298 } 5299 5300 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 5301 struct ksmbd_file *fp, void *rsp_org) 5302 { 5303 struct smb2_file_attr_tag_info *file_info; 5304 5305 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 5306 pr_err("no right to read the attributes : 0x%x\n", 5307 fp->daccess); 5308 return -EACCES; 5309 } 5310 5311 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 5312 file_info->FileAttributes = fp->f_ci->m_fattr; 5313 file_info->ReparseTag = 0; 5314 rsp->OutputBufferLength = 5315 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 5316 return 0; 5317 } 5318 5319 static int find_file_posix_info(struct smb2_query_info_rsp *rsp, 5320 struct ksmbd_file *fp, void *rsp_org) 5321 { 5322 struct smb311_posix_qinfo *file_info; 5323 struct inode *inode = file_inode(fp->filp); 5324 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 5325 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 5326 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 5327 struct kstat stat; 5328 u64 time; 5329 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 5330 int ret; 5331 5332 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 5333 AT_STATX_SYNC_AS_STAT); 5334 if (ret) 5335 return ret; 5336 5337 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 5338 file_info->CreationTime = cpu_to_le64(fp->create_time); 5339 time = ksmbd_UnixTimeToNT(stat.atime); 5340 file_info->LastAccessTime = cpu_to_le64(time); 5341 time = ksmbd_UnixTimeToNT(stat.mtime); 5342 file_info->LastWriteTime = cpu_to_le64(time); 5343 time = ksmbd_UnixTimeToNT(stat.ctime); 5344 file_info->ChangeTime = cpu_to_le64(time); 5345 file_info->DosAttributes = fp->f_ci->m_fattr; 5346 file_info->Inode = cpu_to_le64(stat.ino); 5347 if (ksmbd_stream_fd(fp) == false) { 5348 file_info->EndOfFile = cpu_to_le64(stat.size); 5349 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); 5350 } else { 5351 file_info->EndOfFile = cpu_to_le64(fp->stream.size); 5352 file_info->AllocationSize = cpu_to_le64(fp->stream.size); 5353 } 5354 file_info->HardLinks = cpu_to_le32(stat.nlink); 5355 file_info->Mode = cpu_to_le32(stat.mode & 0777); 5356 switch (stat.mode & S_IFMT) { 5357 case S_IFDIR: 5358 file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); 5359 break; 5360 case S_IFLNK: 5361 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); 5362 break; 5363 case S_IFCHR: 5364 file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); 5365 break; 5366 case S_IFBLK: 5367 file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); 5368 break; 5369 case S_IFIFO: 5370 file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); 5371 break; 5372 case S_IFSOCK: 5373 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); 5374 } 5375 5376 file_info->DeviceId = cpu_to_le32(stat.rdev); 5377 5378 /* 5379 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 5380 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 5381 * sub_auth(4 * 1(num_subauth)) + RID(4). 5382 */ 5383 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 5384 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 5385 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 5386 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 5387 5388 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 5389 5390 return 0; 5391 } 5392 5393 static int smb2_get_info_file(struct ksmbd_work *work, 5394 struct smb2_query_info_req *req, 5395 struct smb2_query_info_rsp *rsp) 5396 { 5397 struct ksmbd_file *fp; 5398 int fileinfoclass = 0; 5399 int rc = 0; 5400 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5401 5402 if (test_share_config_flag(work->tcon->share_conf, 5403 KSMBD_SHARE_FLAG_PIPE)) { 5404 /* smb2 info file called for pipe */ 5405 rc = smb2_get_info_file_pipe(work->sess, req, rsp, 5406 work->response_buf); 5407 goto iov_pin_out; 5408 } 5409 5410 if (work->next_smb2_rcv_hdr_off) { 5411 if (!has_file_id(req->VolatileFileId)) { 5412 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5413 work->compound_fid); 5414 id = work->compound_fid; 5415 pid = work->compound_pfid; 5416 } 5417 } 5418 5419 if (!has_file_id(id)) { 5420 id = req->VolatileFileId; 5421 pid = req->PersistentFileId; 5422 } 5423 5424 fp = ksmbd_lookup_fd_slow(work, id, pid); 5425 if (!fp) 5426 return -ENOENT; 5427 5428 fileinfoclass = req->FileInfoClass; 5429 5430 switch (fileinfoclass) { 5431 case FILE_ACCESS_INFORMATION: 5432 get_file_access_info(rsp, fp, work->response_buf); 5433 break; 5434 5435 case FILE_BASIC_INFORMATION: 5436 rc = get_file_basic_info(rsp, fp, work->response_buf); 5437 break; 5438 5439 case FILE_STANDARD_INFORMATION: 5440 rc = get_file_standard_info(rsp, fp, work->response_buf); 5441 break; 5442 5443 case FILE_ALIGNMENT_INFORMATION: 5444 get_file_alignment_info(rsp, work->response_buf); 5445 break; 5446 5447 case FILE_ALL_INFORMATION: 5448 rc = get_file_all_info(work, rsp, fp, work->response_buf); 5449 break; 5450 5451 case FILE_ALTERNATE_NAME_INFORMATION: 5452 get_file_alternate_info(work, rsp, fp, work->response_buf); 5453 break; 5454 5455 case FILE_STREAM_INFORMATION: 5456 rc = get_file_stream_info(work, rsp, fp, work->response_buf); 5457 break; 5458 5459 case FILE_INTERNAL_INFORMATION: 5460 rc = get_file_internal_info(rsp, fp, work->response_buf); 5461 break; 5462 5463 case FILE_NETWORK_OPEN_INFORMATION: 5464 rc = get_file_network_open_info(rsp, fp, work->response_buf); 5465 break; 5466 5467 case FILE_EA_INFORMATION: 5468 get_file_ea_info(rsp, work->response_buf); 5469 break; 5470 5471 case FILE_FULL_EA_INFORMATION: 5472 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 5473 break; 5474 5475 case FILE_POSITION_INFORMATION: 5476 get_file_position_info(rsp, fp, work->response_buf); 5477 break; 5478 5479 case FILE_MODE_INFORMATION: 5480 get_file_mode_info(rsp, fp, work->response_buf); 5481 break; 5482 5483 case FILE_COMPRESSION_INFORMATION: 5484 rc = get_file_compression_info(rsp, fp, work->response_buf); 5485 break; 5486 5487 case FILE_ATTRIBUTE_TAG_INFORMATION: 5488 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 5489 break; 5490 case SMB_FIND_FILE_POSIX_INFO: 5491 if (!work->tcon->posix_extensions) { 5492 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5493 rc = -EOPNOTSUPP; 5494 } else { 5495 rc = find_file_posix_info(rsp, fp, work->response_buf); 5496 } 5497 break; 5498 default: 5499 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 5500 fileinfoclass); 5501 rc = -EOPNOTSUPP; 5502 } 5503 if (!rc) 5504 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5505 rsp, work->response_buf); 5506 ksmbd_fd_put(work, fp); 5507 5508 iov_pin_out: 5509 if (!rc) 5510 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5511 offsetof(struct smb2_query_info_rsp, Buffer) + 5512 le32_to_cpu(rsp->OutputBufferLength)); 5513 return rc; 5514 } 5515 5516 static int smb2_get_info_filesystem(struct ksmbd_work *work, 5517 struct smb2_query_info_req *req, 5518 struct smb2_query_info_rsp *rsp) 5519 { 5520 struct ksmbd_conn *conn = work->conn; 5521 struct ksmbd_share_config *share = work->tcon->share_conf; 5522 int fsinfoclass = 0; 5523 struct kstatfs stfs; 5524 struct path path; 5525 int rc = 0, len; 5526 5527 if (!share->path) 5528 return -EIO; 5529 5530 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5531 if (rc) { 5532 pr_err("cannot create vfs path\n"); 5533 return -EIO; 5534 } 5535 5536 rc = vfs_statfs(&path, &stfs); 5537 if (rc) { 5538 pr_err("cannot do stat of path %s\n", share->path); 5539 path_put(&path); 5540 return -EIO; 5541 } 5542 5543 fsinfoclass = req->FileInfoClass; 5544 5545 switch (fsinfoclass) { 5546 case FS_DEVICE_INFORMATION: 5547 { 5548 FILE_SYSTEM_DEVICE_INFO *info; 5549 5550 info = (FILE_SYSTEM_DEVICE_INFO *)rsp->Buffer; 5551 5552 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); 5553 info->DeviceCharacteristics = 5554 cpu_to_le32(FILE_DEVICE_IS_MOUNTED); 5555 if (!test_tree_conn_flag(work->tcon, 5556 KSMBD_TREE_CONN_FLAG_WRITABLE)) 5557 info->DeviceCharacteristics |= 5558 cpu_to_le32(FILE_READ_ONLY_DEVICE); 5559 rsp->OutputBufferLength = cpu_to_le32(8); 5560 break; 5561 } 5562 case FS_ATTRIBUTE_INFORMATION: 5563 { 5564 FILE_SYSTEM_ATTRIBUTE_INFO *info; 5565 struct file_kattr fa = {}; 5566 size_t sz; 5567 u32 attrs; 5568 int err; 5569 5570 info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer; 5571 attrs = FILE_SUPPORTS_OBJECT_IDS | 5572 FILE_PERSISTENT_ACLS | 5573 FILE_UNICODE_ON_DISK | 5574 FILE_SUPPORTS_BLOCK_REFCOUNTING; 5575 5576 err = vfs_fileattr_get(path.dentry, &fa); 5577 /* 5578 * -EINVAL, -EOPNOTSUPP: ntfs-3g and other FUSE 5579 * filesystems that lack FS_IOC_FSGETXATTR support. 5580 */ 5581 if (err && err != -ENOIOCTLCMD && err != -ENOTTY && 5582 err != -EINVAL && err != -EOPNOTSUPP) { 5583 path_put(&path); 5584 return err; 5585 } 5586 if (!(fa.fsx_xflags & FS_XFLAG_CASEFOLD)) 5587 attrs |= FILE_CASE_SENSITIVE_SEARCH; 5588 if (!(fa.fsx_xflags & FS_XFLAG_CASENONPRESERVING)) 5589 attrs |= FILE_CASE_PRESERVED_NAMES; 5590 5591 info->Attributes = cpu_to_le32(attrs); 5592 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5593 5594 if (test_share_config_flag(work->tcon->share_conf, 5595 KSMBD_SHARE_FLAG_STREAMS)) 5596 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5597 5598 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5599 /* 5600 * some application(potableapp) can not run on ksmbd share 5601 * because only NTFS handle security setting on windows. 5602 * So Although local fs(EXT4 or F2fs, etc) is not NTFS, 5603 * ksmbd should show share as NTFS. Later, If needed, we can add 5604 * fs type(s) parameter to change fs type user wanted. 5605 */ 5606 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5607 "NTFS", PATH_MAX, conn->local_nls, 0); 5608 len = len * 2; 5609 info->FileSystemNameLen = cpu_to_le32(len); 5610 sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len; 5611 rsp->OutputBufferLength = cpu_to_le32(sz); 5612 break; 5613 } 5614 case FS_VOLUME_INFORMATION: 5615 { 5616 struct filesystem_vol_info *info; 5617 size_t sz; 5618 unsigned int serial_crc = 0; 5619 5620 info = (struct filesystem_vol_info *)(rsp->Buffer); 5621 info->VolumeCreationTime = 0; 5622 serial_crc = crc32_le(serial_crc, share->name, 5623 strlen(share->name)); 5624 serial_crc = crc32_le(serial_crc, share->path, 5625 strlen(share->path)); 5626 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5627 strlen(ksmbd_netbios_name())); 5628 /* Taking dummy value of serial number*/ 5629 info->VolumeSerialNumber = cpu_to_le32(serial_crc); 5630 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5631 share->name, PATH_MAX, 5632 conn->local_nls, 0); 5633 len = len * 2; 5634 info->VolumeLabelLength = cpu_to_le32(len); 5635 info->Reserved = 0; 5636 info->SupportsObjects = 0; 5637 sz = sizeof(struct filesystem_vol_info) + len; 5638 rsp->OutputBufferLength = cpu_to_le32(sz); 5639 break; 5640 } 5641 case FS_SIZE_INFORMATION: 5642 { 5643 FILE_SYSTEM_SIZE_INFO *info; 5644 5645 info = (FILE_SYSTEM_SIZE_INFO *)(rsp->Buffer); 5646 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5647 info->AvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); 5648 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5649 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5650 rsp->OutputBufferLength = cpu_to_le32(24); 5651 break; 5652 } 5653 case FS_FULL_SIZE_INFORMATION: 5654 { 5655 struct smb2_fs_full_size_info *info; 5656 5657 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5658 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5659 info->CallerAvailableAllocationUnits = 5660 cpu_to_le64(stfs.f_bavail); 5661 info->ActualAvailableAllocationUnits = 5662 cpu_to_le64(stfs.f_bfree); 5663 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5664 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5665 rsp->OutputBufferLength = cpu_to_le32(32); 5666 break; 5667 } 5668 case FS_OBJECT_ID_INFORMATION: 5669 { 5670 struct object_id_info *info; 5671 5672 info = (struct object_id_info *)(rsp->Buffer); 5673 5674 if (path.mnt->mnt_sb->s_uuid_len == 16) 5675 memcpy(info->objid, path.mnt->mnt_sb->s_uuid.b, 5676 path.mnt->mnt_sb->s_uuid_len); 5677 else 5678 memcpy(info->objid, &stfs.f_fsid, sizeof(stfs.f_fsid)); 5679 5680 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5681 info->extended_info.version = cpu_to_le32(1); 5682 info->extended_info.release = cpu_to_le32(1); 5683 info->extended_info.rel_date = 0; 5684 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5685 rsp->OutputBufferLength = cpu_to_le32(64); 5686 break; 5687 } 5688 case FS_SECTOR_SIZE_INFORMATION: 5689 { 5690 struct smb3_fs_ss_info *info; 5691 unsigned int sector_size = 5692 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5693 5694 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5695 5696 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5697 info->PhysicalBytesPerSectorForAtomicity = 5698 cpu_to_le32(sector_size); 5699 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5700 info->FSEffPhysicalBytesPerSectorForAtomicity = 5701 cpu_to_le32(sector_size); 5702 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5703 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5704 info->ByteOffsetForSectorAlignment = 0; 5705 info->ByteOffsetForPartitionAlignment = 0; 5706 rsp->OutputBufferLength = cpu_to_le32(28); 5707 break; 5708 } 5709 case FS_CONTROL_INFORMATION: 5710 { 5711 /* 5712 * TODO : The current implementation is based on 5713 * test result with win7(NTFS) server. It's need to 5714 * modify this to get valid Quota values 5715 * from Linux kernel 5716 */ 5717 struct smb2_fs_control_info *info; 5718 5719 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5720 info->FreeSpaceStartFiltering = 0; 5721 info->FreeSpaceThreshold = 0; 5722 info->FreeSpaceStopFiltering = 0; 5723 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5724 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5725 info->Padding = 0; 5726 rsp->OutputBufferLength = cpu_to_le32(48); 5727 break; 5728 } 5729 case FS_POSIX_INFORMATION: 5730 { 5731 FILE_SYSTEM_POSIX_INFO *info; 5732 5733 if (!work->tcon->posix_extensions) { 5734 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5735 path_put(&path); 5736 return -EOPNOTSUPP; 5737 } else { 5738 info = (FILE_SYSTEM_POSIX_INFO *)(rsp->Buffer); 5739 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5740 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5741 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5742 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5743 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5744 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5745 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5746 rsp->OutputBufferLength = cpu_to_le32(56); 5747 } 5748 break; 5749 } 5750 default: 5751 path_put(&path); 5752 return -EOPNOTSUPP; 5753 } 5754 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5755 rsp, work->response_buf); 5756 path_put(&path); 5757 5758 if (!rc) 5759 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5760 offsetof(struct smb2_query_info_rsp, Buffer) + 5761 le32_to_cpu(rsp->OutputBufferLength)); 5762 return rc; 5763 } 5764 5765 static int smb2_get_info_sec(struct ksmbd_work *work, 5766 struct smb2_query_info_req *req, 5767 struct smb2_query_info_rsp *rsp) 5768 { 5769 struct ksmbd_file *fp; 5770 struct mnt_idmap *idmap; 5771 struct smb_ntsd *pntsd = NULL, *ppntsd = NULL; 5772 struct smb_fattr fattr = {{0}}; 5773 struct inode *inode; 5774 __u32 secdesclen = 0; 5775 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5776 int addition_info = le32_to_cpu(req->AdditionalInformation); 5777 int rc = 0, ppntsd_size = 0, max_len; 5778 size_t scratch_len = 0; 5779 5780 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5781 PROTECTED_DACL_SECINFO | 5782 UNPROTECTED_DACL_SECINFO)) { 5783 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5784 addition_info); 5785 5786 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 5787 return -EINVAL; 5788 } 5789 5790 if (work->next_smb2_rcv_hdr_off) { 5791 if (!has_file_id(req->VolatileFileId)) { 5792 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5793 work->compound_fid); 5794 id = work->compound_fid; 5795 pid = work->compound_pfid; 5796 } 5797 } 5798 5799 if (!has_file_id(id)) { 5800 id = req->VolatileFileId; 5801 pid = req->PersistentFileId; 5802 } 5803 5804 fp = ksmbd_lookup_fd_slow(work, id, pid); 5805 if (!fp) 5806 return -ENOENT; 5807 5808 idmap = file_mnt_idmap(fp->filp); 5809 inode = file_inode(fp->filp); 5810 ksmbd_acls_fattr(&fattr, idmap, inode); 5811 5812 if (test_share_config_flag(work->tcon->share_conf, 5813 KSMBD_SHARE_FLAG_ACL_XATTR)) 5814 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5815 fp->filp->f_path.dentry, 5816 &ppntsd); 5817 5818 /* Check if sd buffer size exceeds response buffer size */ 5819 max_len = smb2_calc_max_out_buf_len(work, 5820 offsetof(struct smb2_query_info_rsp, Buffer), 5821 le32_to_cpu(req->OutputBufferLength)); 5822 if (max_len < 0) { 5823 rc = -EINVAL; 5824 goto release_acl; 5825 } 5826 5827 scratch_len = smb_acl_sec_desc_scratch_len(&fattr, ppntsd, 5828 ppntsd_size, addition_info); 5829 if (!scratch_len || scratch_len == SIZE_MAX) { 5830 rc = -EFBIG; 5831 goto release_acl; 5832 } 5833 5834 pntsd = kvzalloc(scratch_len, KSMBD_DEFAULT_GFP); 5835 if (!pntsd) { 5836 rc = -ENOMEM; 5837 goto release_acl; 5838 } 5839 5840 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5841 addition_info, &secdesclen, &fattr); 5842 5843 release_acl: 5844 posix_acl_release(fattr.cf_acls); 5845 posix_acl_release(fattr.cf_dacls); 5846 kfree(ppntsd); 5847 ksmbd_fd_put(work, fp); 5848 5849 if (!rc && ALIGN(secdesclen, 8) > scratch_len) 5850 rc = -EFBIG; 5851 if (rc) 5852 goto err_out; 5853 5854 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5855 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5856 rsp, work->response_buf); 5857 if (rc) 5858 goto err_out; 5859 5860 rc = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 5861 offsetof(struct smb2_query_info_rsp, Buffer), 5862 pntsd, secdesclen); 5863 err_out: 5864 if (rc) { 5865 rsp->OutputBufferLength = 0; 5866 kvfree(pntsd); 5867 } 5868 5869 return rc; 5870 } 5871 5872 /** 5873 * smb2_query_info() - handler for smb2 query info command 5874 * @work: smb work containing query info request buffer 5875 * 5876 * Return: 0 on success, otherwise error 5877 */ 5878 int smb2_query_info(struct ksmbd_work *work) 5879 { 5880 struct smb2_query_info_req *req; 5881 struct smb2_query_info_rsp *rsp; 5882 int rc = 0; 5883 5884 ksmbd_debug(SMB, "Received request smb2 query info request\n"); 5885 5886 WORK_BUFFERS(work, req, rsp); 5887 5888 if (ksmbd_override_fsids(work)) { 5889 rc = -ENOMEM; 5890 goto err_out; 5891 } 5892 5893 rsp->StructureSize = cpu_to_le16(9); 5894 rsp->OutputBufferOffset = cpu_to_le16(72); 5895 5896 switch (req->InfoType) { 5897 case SMB2_O_INFO_FILE: 5898 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5899 rc = smb2_get_info_file(work, req, rsp); 5900 break; 5901 case SMB2_O_INFO_FILESYSTEM: 5902 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5903 rc = smb2_get_info_filesystem(work, req, rsp); 5904 break; 5905 case SMB2_O_INFO_SECURITY: 5906 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5907 rc = smb2_get_info_sec(work, req, rsp); 5908 break; 5909 default: 5910 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5911 req->InfoType); 5912 rc = -EOPNOTSUPP; 5913 } 5914 ksmbd_revert_fsids(work); 5915 5916 err_out: 5917 if (rc < 0) { 5918 if (rc == -EACCES) 5919 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5920 else if (rc == -ENOENT) 5921 rsp->hdr.Status = STATUS_FILE_CLOSED; 5922 else if (rc == -EIO) 5923 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5924 else if (rc == -ENOMEM) 5925 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5926 else if (rc == -EINVAL && rsp->hdr.Status == 0) 5927 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5928 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5929 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5930 smb2_set_err_rsp(work); 5931 5932 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5933 rc); 5934 return rc; 5935 } 5936 return 0; 5937 } 5938 5939 /** 5940 * smb2_close_pipe() - handler for closing IPC pipe 5941 * @work: smb work containing close request buffer 5942 * 5943 * Return: 0 5944 */ 5945 static noinline int smb2_close_pipe(struct ksmbd_work *work) 5946 { 5947 u64 id; 5948 struct smb2_close_req *req; 5949 struct smb2_close_rsp *rsp; 5950 5951 WORK_BUFFERS(work, req, rsp); 5952 5953 id = req->VolatileFileId; 5954 ksmbd_session_rpc_close(work->sess, id); 5955 5956 rsp->StructureSize = cpu_to_le16(60); 5957 rsp->Flags = 0; 5958 rsp->Reserved = 0; 5959 rsp->CreationTime = 0; 5960 rsp->LastAccessTime = 0; 5961 rsp->LastWriteTime = 0; 5962 rsp->ChangeTime = 0; 5963 rsp->AllocationSize = 0; 5964 rsp->EndOfFile = 0; 5965 rsp->Attributes = 0; 5966 5967 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5968 sizeof(struct smb2_close_rsp)); 5969 } 5970 5971 /** 5972 * smb2_close() - handler for smb2 close file command 5973 * @work: smb work containing close request buffer 5974 * 5975 * Return: 0 on success, otherwise error 5976 */ 5977 int smb2_close(struct ksmbd_work *work) 5978 { 5979 u64 volatile_id = KSMBD_NO_FID; 5980 u64 sess_id; 5981 struct smb2_close_req *req; 5982 struct smb2_close_rsp *rsp; 5983 struct ksmbd_conn *conn = work->conn; 5984 struct ksmbd_file *fp; 5985 u64 time; 5986 int err = 0; 5987 5988 ksmbd_debug(SMB, "Received smb2 close request\n"); 5989 5990 WORK_BUFFERS(work, req, rsp); 5991 5992 if (test_share_config_flag(work->tcon->share_conf, 5993 KSMBD_SHARE_FLAG_PIPE)) { 5994 ksmbd_debug(SMB, "IPC pipe close request\n"); 5995 return smb2_close_pipe(work); 5996 } 5997 5998 sess_id = le64_to_cpu(req->hdr.SessionId); 5999 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 6000 sess_id = work->compound_sid; 6001 6002 work->compound_sid = 0; 6003 if (check_session_id(conn, sess_id)) { 6004 work->compound_sid = sess_id; 6005 } else { 6006 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 6007 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 6008 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6009 err = -EBADF; 6010 goto out; 6011 } 6012 6013 if (work->next_smb2_rcv_hdr_off && 6014 !has_file_id(req->VolatileFileId)) { 6015 if (!has_file_id(work->compound_fid)) { 6016 /* file already closed, return FILE_CLOSED */ 6017 ksmbd_debug(SMB, "file already closed\n"); 6018 rsp->hdr.Status = STATUS_FILE_CLOSED; 6019 err = -EBADF; 6020 goto out; 6021 } else { 6022 ksmbd_debug(SMB, 6023 "Compound request set FID = %llu:%llu\n", 6024 work->compound_fid, 6025 work->compound_pfid); 6026 volatile_id = work->compound_fid; 6027 6028 /* file closed, stored id is not valid anymore */ 6029 work->compound_fid = KSMBD_NO_FID; 6030 work->compound_pfid = KSMBD_NO_FID; 6031 } 6032 } else { 6033 volatile_id = req->VolatileFileId; 6034 } 6035 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 6036 6037 rsp->StructureSize = cpu_to_le16(60); 6038 rsp->Reserved = 0; 6039 6040 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 6041 struct kstat stat; 6042 int ret; 6043 6044 fp = ksmbd_lookup_fd_fast(work, volatile_id); 6045 if (!fp) { 6046 err = -ENOENT; 6047 goto out; 6048 } 6049 6050 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6051 AT_STATX_SYNC_AS_STAT); 6052 if (ret) { 6053 ksmbd_fd_put(work, fp); 6054 goto out; 6055 } 6056 6057 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 6058 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 6059 cpu_to_le64(stat.blocks << 9); 6060 rsp->EndOfFile = cpu_to_le64(stat.size); 6061 rsp->Attributes = fp->f_ci->m_fattr; 6062 rsp->CreationTime = cpu_to_le64(fp->create_time); 6063 time = ksmbd_UnixTimeToNT(stat.atime); 6064 rsp->LastAccessTime = cpu_to_le64(time); 6065 time = ksmbd_UnixTimeToNT(stat.mtime); 6066 rsp->LastWriteTime = cpu_to_le64(time); 6067 time = ksmbd_UnixTimeToNT(stat.ctime); 6068 rsp->ChangeTime = cpu_to_le64(time); 6069 ksmbd_fd_put(work, fp); 6070 } else { 6071 rsp->Flags = 0; 6072 rsp->AllocationSize = 0; 6073 rsp->EndOfFile = 0; 6074 rsp->Attributes = 0; 6075 rsp->CreationTime = 0; 6076 rsp->LastAccessTime = 0; 6077 rsp->LastWriteTime = 0; 6078 rsp->ChangeTime = 0; 6079 } 6080 6081 err = ksmbd_close_fd(work, volatile_id); 6082 out: 6083 if (!err) 6084 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6085 sizeof(struct smb2_close_rsp)); 6086 6087 if (err) { 6088 if (rsp->hdr.Status == 0) 6089 rsp->hdr.Status = STATUS_FILE_CLOSED; 6090 smb2_set_err_rsp(work); 6091 } 6092 6093 return err; 6094 } 6095 6096 /** 6097 * smb2_echo() - handler for smb2 echo(ping) command 6098 * @work: smb work containing echo request buffer 6099 * 6100 * Return: 0 on success, otherwise error 6101 */ 6102 int smb2_echo(struct ksmbd_work *work) 6103 { 6104 struct smb2_echo_rsp *rsp = smb_get_msg(work->response_buf); 6105 6106 ksmbd_debug(SMB, "Received smb2 echo request\n"); 6107 6108 if (work->next_smb2_rcv_hdr_off) 6109 rsp = ksmbd_resp_buf_next(work); 6110 6111 rsp->StructureSize = cpu_to_le16(4); 6112 rsp->Reserved = 0; 6113 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 6114 } 6115 6116 static int smb2_rename(struct ksmbd_work *work, 6117 struct ksmbd_file *fp, 6118 struct smb2_file_rename_info *file_info, 6119 struct nls_table *local_nls) 6120 { 6121 struct ksmbd_share_config *share = fp->tcon->share_conf; 6122 char *new_name = NULL; 6123 int rc, flags = 0; 6124 6125 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 6126 new_name = smb2_get_name(file_info->FileName, 6127 le32_to_cpu(file_info->FileNameLength), 6128 local_nls); 6129 if (IS_ERR(new_name)) 6130 return PTR_ERR(new_name); 6131 6132 if (fp->is_posix_ctxt == false && strchr(new_name, ':')) { 6133 int s_type; 6134 char *xattr_stream_name, *stream_name = NULL; 6135 size_t xattr_stream_size; 6136 int len; 6137 6138 rc = parse_stream_name(new_name, &stream_name, &s_type); 6139 if (rc < 0) 6140 goto out; 6141 6142 len = strlen(new_name); 6143 if (len > 0 && new_name[len - 1] != '/') { 6144 pr_err("not allow base filename in rename\n"); 6145 rc = -ESHARE; 6146 goto out; 6147 } 6148 6149 rc = ksmbd_vfs_xattr_stream_name(stream_name, 6150 &xattr_stream_name, 6151 &xattr_stream_size, 6152 s_type); 6153 if (rc) 6154 goto out; 6155 6156 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 6157 &fp->filp->f_path, 6158 xattr_stream_name, 6159 NULL, 0, 0, true); 6160 if (rc < 0) { 6161 pr_err("failed to store stream name in xattr: %d\n", 6162 rc); 6163 rc = -EINVAL; 6164 goto out; 6165 } 6166 6167 goto out; 6168 } 6169 6170 ksmbd_debug(SMB, "new name %s\n", new_name); 6171 if (ksmbd_share_veto_filename(share, new_name)) { 6172 rc = -ENOENT; 6173 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 6174 goto out; 6175 } 6176 6177 if (!file_info->ReplaceIfExists) 6178 flags = RENAME_NOREPLACE; 6179 6180 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 6181 if (!rc) 6182 smb_break_all_levII_oplock(work, fp, 0); 6183 out: 6184 kfree(new_name); 6185 return rc; 6186 } 6187 6188 static int smb2_create_link(struct ksmbd_work *work, 6189 struct ksmbd_share_config *share, 6190 struct smb2_file_link_info *file_info, 6191 unsigned int buf_len, struct file *filp, 6192 struct nls_table *local_nls) 6193 { 6194 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 6195 struct path path; 6196 int rc; 6197 6198 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 6199 le32_to_cpu(file_info->FileNameLength)) 6200 return -EINVAL; 6201 6202 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 6203 pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP); 6204 if (!pathname) 6205 return -ENOMEM; 6206 6207 link_name = smb2_get_name(file_info->FileName, 6208 le32_to_cpu(file_info->FileNameLength), 6209 local_nls); 6210 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 6211 rc = -EINVAL; 6212 goto out; 6213 } 6214 6215 ksmbd_debug(SMB, "link name is %s\n", link_name); 6216 target_name = file_path(filp, pathname, PATH_MAX); 6217 if (IS_ERR(target_name)) { 6218 rc = -EINVAL; 6219 goto out; 6220 } 6221 6222 ksmbd_debug(SMB, "target name is %s\n", target_name); 6223 rc = ksmbd_vfs_kern_path_start_removing(work, link_name, LOOKUP_NO_SYMLINKS, 6224 &path, 0); 6225 if (rc) { 6226 if (rc != -ENOENT) 6227 goto out; 6228 } else { 6229 if (file_info->ReplaceIfExists) { 6230 rc = ksmbd_vfs_remove_file(work, &path); 6231 if (rc) { 6232 rc = -EINVAL; 6233 ksmbd_debug(SMB, "cannot delete %s\n", 6234 link_name); 6235 } 6236 } else { 6237 rc = -EEXIST; 6238 ksmbd_debug(SMB, "link already exists\n"); 6239 } 6240 ksmbd_vfs_kern_path_end_removing(&path); 6241 if (rc) 6242 goto out; 6243 } 6244 rc = ksmbd_vfs_link(work, target_name, link_name); 6245 if (rc) 6246 rc = -EINVAL; 6247 out: 6248 6249 if (!IS_ERR(link_name)) 6250 kfree(link_name); 6251 kfree(pathname); 6252 return rc; 6253 } 6254 6255 static int set_file_basic_info(struct ksmbd_file *fp, 6256 struct file_basic_info *file_info, 6257 struct ksmbd_share_config *share) 6258 { 6259 struct iattr attrs; 6260 struct file *filp; 6261 struct inode *inode; 6262 struct mnt_idmap *idmap; 6263 int rc = 0; 6264 6265 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 6266 return -EACCES; 6267 6268 attrs.ia_valid = 0; 6269 filp = fp->filp; 6270 inode = file_inode(filp); 6271 idmap = file_mnt_idmap(filp); 6272 6273 if (file_info->CreationTime) 6274 fp->create_time = le64_to_cpu(file_info->CreationTime); 6275 6276 if (file_info->LastAccessTime) { 6277 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 6278 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 6279 } 6280 6281 if (file_info->ChangeTime) 6282 inode_set_ctime_to_ts(inode, 6283 ksmbd_NTtimeToUnix(file_info->ChangeTime)); 6284 6285 if (file_info->LastWriteTime) { 6286 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 6287 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME); 6288 } 6289 6290 if (file_info->Attributes) { 6291 if (!S_ISDIR(inode->i_mode) && 6292 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 6293 pr_err("can't change a file to a directory\n"); 6294 return -EINVAL; 6295 } 6296 6297 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 6298 fp->f_ci->m_fattr = file_info->Attributes | 6299 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 6300 } 6301 6302 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 6303 (file_info->CreationTime || file_info->Attributes)) { 6304 struct xattr_dos_attrib da = {0}; 6305 6306 da.version = 4; 6307 da.itime = fp->itime; 6308 da.create_time = fp->create_time; 6309 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 6310 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 6311 XATTR_DOSINFO_ITIME; 6312 6313 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 6314 true); 6315 if (rc) 6316 ksmbd_debug(SMB, 6317 "failed to restore file attribute in EA\n"); 6318 rc = 0; 6319 } 6320 6321 if (attrs.ia_valid) { 6322 struct dentry *dentry = filp->f_path.dentry; 6323 struct inode *inode = d_inode(dentry); 6324 6325 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 6326 return -EACCES; 6327 6328 inode_lock(inode); 6329 rc = notify_change(idmap, dentry, &attrs, NULL); 6330 inode_unlock(inode); 6331 } 6332 return rc; 6333 } 6334 6335 static int set_file_allocation_info(struct ksmbd_work *work, 6336 struct ksmbd_file *fp, 6337 struct smb2_file_alloc_info *file_alloc_info) 6338 { 6339 /* 6340 * TODO : It's working fine only when store dos attributes 6341 * is not yes. need to implement a logic which works 6342 * properly with any smb.conf option 6343 */ 6344 6345 loff_t alloc_blks; 6346 struct inode *inode; 6347 struct kstat stat; 6348 int rc; 6349 6350 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6351 return -EACCES; 6352 6353 if (ksmbd_stream_fd(fp) == true) 6354 return 0; 6355 6356 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, 6357 AT_STATX_SYNC_AS_STAT); 6358 if (rc) 6359 return rc; 6360 6361 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 6362 inode = file_inode(fp->filp); 6363 6364 if (alloc_blks > stat.blocks) { 6365 smb_break_all_levII_oplock(work, fp, 1); 6366 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 6367 alloc_blks * 512); 6368 if (rc && rc != -EOPNOTSUPP) { 6369 pr_err("vfs_fallocate is failed : %d\n", rc); 6370 return rc; 6371 } 6372 } else if (alloc_blks < stat.blocks) { 6373 loff_t size; 6374 6375 /* 6376 * Allocation size could be smaller than original one 6377 * which means allocated blocks in file should be 6378 * deallocated. use truncate to cut out it, but inode 6379 * size is also updated with truncate offset. 6380 * inode size is retained by backup inode size. 6381 */ 6382 size = i_size_read(inode); 6383 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 6384 if (rc) { 6385 pr_err("truncate failed!, err %d\n", rc); 6386 return rc; 6387 } 6388 if (size < alloc_blks * 512) 6389 i_size_write(inode, size); 6390 } 6391 return 0; 6392 } 6393 6394 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6395 struct smb2_file_eof_info *file_eof_info) 6396 { 6397 loff_t newsize; 6398 struct inode *inode; 6399 int rc; 6400 6401 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 6402 return -EACCES; 6403 6404 newsize = le64_to_cpu(file_eof_info->EndOfFile); 6405 inode = file_inode(fp->filp); 6406 6407 /* 6408 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 6409 * on FAT32 shared device, truncate execution time is too long 6410 * and network error could cause from windows client. because 6411 * truncate of some filesystem like FAT32 fill zero data in 6412 * truncated range. 6413 */ 6414 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC && 6415 ksmbd_stream_fd(fp) == false) { 6416 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 6417 rc = ksmbd_vfs_truncate(work, fp, newsize); 6418 if (rc) { 6419 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 6420 if (rc != -EAGAIN) 6421 rc = -EBADF; 6422 return rc; 6423 } 6424 } 6425 return 0; 6426 } 6427 6428 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 6429 struct smb2_file_rename_info *rename_info, 6430 unsigned int buf_len) 6431 { 6432 if (!(fp->daccess & FILE_DELETE_LE)) { 6433 pr_err("no right to delete : 0x%x\n", fp->daccess); 6434 return -EACCES; 6435 } 6436 6437 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 6438 le32_to_cpu(rename_info->FileNameLength)) 6439 return -EINVAL; 6440 6441 if (!le32_to_cpu(rename_info->FileNameLength)) 6442 return -EINVAL; 6443 6444 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 6445 } 6446 6447 static int set_file_disposition_info(struct ksmbd_file *fp, 6448 struct smb2_file_disposition_info *file_info) 6449 { 6450 struct inode *inode; 6451 6452 if (!(fp->daccess & FILE_DELETE_LE)) { 6453 pr_err("no right to delete : 0x%x\n", fp->daccess); 6454 return -EACCES; 6455 } 6456 6457 inode = file_inode(fp->filp); 6458 if (file_info->DeletePending) { 6459 if (S_ISDIR(inode->i_mode) && 6460 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 6461 return -EBUSY; 6462 ksmbd_set_inode_pending_delete(fp); 6463 } else { 6464 ksmbd_clear_inode_pending_delete(fp); 6465 } 6466 return 0; 6467 } 6468 6469 static int set_file_position_info(struct ksmbd_file *fp, 6470 struct smb2_file_pos_info *file_info) 6471 { 6472 loff_t current_byte_offset; 6473 unsigned long sector_size; 6474 struct inode *inode; 6475 6476 inode = file_inode(fp->filp); 6477 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 6478 sector_size = inode->i_sb->s_blocksize; 6479 6480 if (current_byte_offset < 0 || 6481 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 6482 current_byte_offset & (sector_size - 1))) { 6483 pr_err("CurrentByteOffset is not valid : %llu\n", 6484 current_byte_offset); 6485 return -EINVAL; 6486 } 6487 6488 if (ksmbd_stream_fd(fp) == false) 6489 fp->filp->f_pos = current_byte_offset; 6490 else { 6491 if (current_byte_offset > XATTR_SIZE_MAX) 6492 current_byte_offset = XATTR_SIZE_MAX; 6493 fp->stream.pos = current_byte_offset; 6494 } 6495 return 0; 6496 } 6497 6498 static int set_file_mode_info(struct ksmbd_file *fp, 6499 struct smb2_file_mode_info *file_info) 6500 { 6501 __le32 mode; 6502 6503 mode = file_info->Mode; 6504 6505 if ((mode & ~FILE_MODE_INFO_MASK)) { 6506 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 6507 return -EINVAL; 6508 } 6509 6510 /* 6511 * TODO : need to implement consideration for 6512 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 6513 */ 6514 ksmbd_vfs_set_fadvise(fp->filp, mode); 6515 fp->coption = mode; 6516 return 0; 6517 } 6518 6519 /** 6520 * smb2_set_info_file() - handler for smb2 set info command 6521 * @work: smb work containing set info command buffer 6522 * @fp: ksmbd_file pointer 6523 * @req: request buffer pointer 6524 * @share: ksmbd_share_config pointer 6525 * 6526 * Return: 0 on success, otherwise error 6527 */ 6528 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 6529 struct smb2_set_info_req *req, 6530 struct ksmbd_share_config *share) 6531 { 6532 unsigned int buf_len = le32_to_cpu(req->BufferLength); 6533 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); 6534 6535 switch (req->FileInfoClass) { 6536 case FILE_BASIC_INFORMATION: 6537 { 6538 if (buf_len < sizeof(struct file_basic_info)) 6539 return -EMSGSIZE; 6540 6541 return set_file_basic_info(fp, (struct file_basic_info *)buffer, share); 6542 } 6543 case FILE_ALLOCATION_INFORMATION: 6544 { 6545 if (buf_len < sizeof(struct smb2_file_alloc_info)) 6546 return -EMSGSIZE; 6547 6548 return set_file_allocation_info(work, fp, 6549 (struct smb2_file_alloc_info *)buffer); 6550 } 6551 case FILE_END_OF_FILE_INFORMATION: 6552 { 6553 if (buf_len < sizeof(struct smb2_file_eof_info)) 6554 return -EMSGSIZE; 6555 6556 return set_end_of_file_info(work, fp, 6557 (struct smb2_file_eof_info *)buffer); 6558 } 6559 case FILE_RENAME_INFORMATION: 6560 { 6561 if (buf_len < sizeof(struct smb2_file_rename_info)) 6562 return -EMSGSIZE; 6563 6564 return set_rename_info(work, fp, 6565 (struct smb2_file_rename_info *)buffer, 6566 buf_len); 6567 } 6568 case FILE_LINK_INFORMATION: 6569 { 6570 if (buf_len < sizeof(struct smb2_file_link_info)) 6571 return -EMSGSIZE; 6572 6573 return smb2_create_link(work, work->tcon->share_conf, 6574 (struct smb2_file_link_info *)buffer, 6575 buf_len, fp->filp, 6576 work->conn->local_nls); 6577 } 6578 case FILE_DISPOSITION_INFORMATION: 6579 { 6580 if (buf_len < sizeof(struct smb2_file_disposition_info)) 6581 return -EMSGSIZE; 6582 6583 return set_file_disposition_info(fp, 6584 (struct smb2_file_disposition_info *)buffer); 6585 } 6586 case FILE_FULL_EA_INFORMATION: 6587 { 6588 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 6589 pr_err("Not permitted to write ext attr: 0x%x\n", 6590 fp->daccess); 6591 return -EACCES; 6592 } 6593 6594 if (buf_len < sizeof(struct smb2_ea_info)) 6595 return -EMSGSIZE; 6596 6597 return smb2_set_ea((struct smb2_ea_info *)buffer, 6598 buf_len, &fp->filp->f_path, true); 6599 } 6600 case FILE_POSITION_INFORMATION: 6601 { 6602 if (buf_len < sizeof(struct smb2_file_pos_info)) 6603 return -EMSGSIZE; 6604 6605 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); 6606 } 6607 case FILE_MODE_INFORMATION: 6608 { 6609 if (buf_len < sizeof(struct smb2_file_mode_info)) 6610 return -EMSGSIZE; 6611 6612 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); 6613 } 6614 } 6615 6616 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6617 return -EOPNOTSUPP; 6618 } 6619 6620 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6621 char *buffer, int buf_len) 6622 { 6623 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6624 6625 fp->saccess |= FILE_SHARE_DELETE_LE; 6626 6627 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6628 buf_len, false, true); 6629 } 6630 6631 /** 6632 * smb2_set_info() - handler for smb2 set info command handler 6633 * @work: smb work containing set info request buffer 6634 * 6635 * Return: 0 on success, otherwise error 6636 */ 6637 int smb2_set_info(struct ksmbd_work *work) 6638 { 6639 struct smb2_set_info_req *req; 6640 struct smb2_set_info_rsp *rsp; 6641 struct ksmbd_file *fp = NULL; 6642 int rc = 0; 6643 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6644 6645 ksmbd_debug(SMB, "Received smb2 set info request\n"); 6646 6647 if (work->next_smb2_rcv_hdr_off) { 6648 req = ksmbd_req_buf_next(work); 6649 rsp = ksmbd_resp_buf_next(work); 6650 if (!has_file_id(req->VolatileFileId)) { 6651 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6652 work->compound_fid); 6653 id = work->compound_fid; 6654 pid = work->compound_pfid; 6655 } 6656 } else { 6657 req = smb_get_msg(work->request_buf); 6658 rsp = smb_get_msg(work->response_buf); 6659 } 6660 6661 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6662 ksmbd_debug(SMB, "User does not have write permission\n"); 6663 pr_err("User does not have write permission\n"); 6664 rc = -EACCES; 6665 goto err_out; 6666 } 6667 6668 if (!has_file_id(id)) { 6669 id = req->VolatileFileId; 6670 pid = req->PersistentFileId; 6671 } 6672 6673 fp = ksmbd_lookup_fd_slow(work, id, pid); 6674 if (!fp) { 6675 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6676 rc = -ENOENT; 6677 goto err_out; 6678 } 6679 6680 switch (req->InfoType) { 6681 case SMB2_O_INFO_FILE: 6682 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6683 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6684 break; 6685 case SMB2_O_INFO_SECURITY: 6686 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6687 if (ksmbd_override_fsids(work)) { 6688 rc = -ENOMEM; 6689 goto err_out; 6690 } 6691 rc = smb2_set_info_sec(fp, 6692 le32_to_cpu(req->AdditionalInformation), 6693 (char *)req + le16_to_cpu(req->BufferOffset), 6694 le32_to_cpu(req->BufferLength)); 6695 ksmbd_revert_fsids(work); 6696 break; 6697 default: 6698 rc = -EOPNOTSUPP; 6699 } 6700 6701 if (rc < 0) 6702 goto err_out; 6703 6704 rsp->StructureSize = cpu_to_le16(2); 6705 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6706 sizeof(struct smb2_set_info_rsp)); 6707 if (rc) 6708 goto err_out; 6709 ksmbd_fd_put(work, fp); 6710 return 0; 6711 6712 err_out: 6713 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6714 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6715 else if (rc == -EINVAL) 6716 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6717 else if (rc == -EMSGSIZE) 6718 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 6719 else if (rc == -ESHARE) 6720 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6721 else if (rc == -ENOENT) 6722 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6723 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6724 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6725 else if (rc == -EAGAIN) 6726 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6727 else if (rc == -EBADF || rc == -ESTALE) 6728 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6729 else if (rc == -EEXIST) 6730 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6731 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6732 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6733 smb2_set_err_rsp(work); 6734 ksmbd_fd_put(work, fp); 6735 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6736 return rc; 6737 } 6738 6739 /** 6740 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6741 * @work: smb work containing read IPC pipe command buffer 6742 * 6743 * Return: 0 on success, otherwise error 6744 */ 6745 static noinline int smb2_read_pipe(struct ksmbd_work *work) 6746 { 6747 int nbytes = 0, err; 6748 u64 id; 6749 struct ksmbd_rpc_command *rpc_resp; 6750 struct smb2_read_req *req; 6751 struct smb2_read_rsp *rsp; 6752 6753 WORK_BUFFERS(work, req, rsp); 6754 6755 id = req->VolatileFileId; 6756 6757 rpc_resp = ksmbd_rpc_read(work->sess, id); 6758 if (rpc_resp) { 6759 void *aux_payload_buf; 6760 6761 if (rpc_resp->flags != KSMBD_RPC_OK) { 6762 err = -EINVAL; 6763 goto out; 6764 } 6765 6766 aux_payload_buf = 6767 kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP); 6768 if (!aux_payload_buf) { 6769 err = -ENOMEM; 6770 goto out; 6771 } 6772 6773 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6774 6775 nbytes = rpc_resp->payload_sz; 6776 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6777 offsetof(struct smb2_read_rsp, Buffer), 6778 aux_payload_buf, nbytes); 6779 if (err) { 6780 kvfree(aux_payload_buf); 6781 goto out; 6782 } 6783 kvfree(rpc_resp); 6784 } else { 6785 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6786 offsetof(struct smb2_read_rsp, Buffer)); 6787 if (err) 6788 goto out; 6789 } 6790 6791 rsp->StructureSize = cpu_to_le16(17); 6792 rsp->DataOffset = 80; 6793 rsp->Reserved = 0; 6794 rsp->DataLength = cpu_to_le32(nbytes); 6795 rsp->DataRemaining = 0; 6796 rsp->Flags = 0; 6797 return 0; 6798 6799 out: 6800 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6801 smb2_set_err_rsp(work); 6802 kvfree(rpc_resp); 6803 return err; 6804 } 6805 6806 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6807 struct smbdirect_buffer_descriptor_v1 *desc, 6808 __le32 Channel, 6809 __le16 ChannelInfoLength) 6810 { 6811 unsigned int i, ch_count; 6812 6813 if (work->conn->dialect == SMB30_PROT_ID && 6814 Channel != SMB2_CHANNEL_RDMA_V1) 6815 return -EINVAL; 6816 6817 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6818 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6819 for (i = 0; i < ch_count; i++) { 6820 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6821 i, 6822 le32_to_cpu(desc[i].token), 6823 le32_to_cpu(desc[i].length)); 6824 } 6825 } 6826 if (!ch_count) 6827 return -EINVAL; 6828 6829 work->need_invalidate_rkey = 6830 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6831 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6832 work->remote_key = le32_to_cpu(desc->token); 6833 return 0; 6834 } 6835 6836 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6837 struct smb2_read_req *req, void *data_buf, 6838 size_t length) 6839 { 6840 int err; 6841 6842 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6843 (struct smbdirect_buffer_descriptor_v1 *) 6844 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6845 le16_to_cpu(req->ReadChannelInfoLength)); 6846 if (err) 6847 return err; 6848 6849 return length; 6850 } 6851 6852 /** 6853 * smb2_read() - handler for smb2 read from file 6854 * @work: smb work containing read command buffer 6855 * 6856 * Return: 0 on success, otherwise error 6857 */ 6858 int smb2_read(struct ksmbd_work *work) 6859 { 6860 struct ksmbd_conn *conn = work->conn; 6861 struct smb2_read_req *req; 6862 struct smb2_read_rsp *rsp; 6863 struct ksmbd_file *fp = NULL; 6864 loff_t offset; 6865 size_t length, mincount; 6866 ssize_t nbytes = 0, remain_bytes = 0; 6867 int err = 0; 6868 bool is_rdma_channel = false; 6869 unsigned int max_read_size = conn->vals->max_read_size; 6870 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6871 void *aux_payload_buf; 6872 6873 ksmbd_debug(SMB, "Received smb2 read request\n"); 6874 6875 if (test_share_config_flag(work->tcon->share_conf, 6876 KSMBD_SHARE_FLAG_PIPE)) { 6877 ksmbd_debug(SMB, "IPC pipe read request\n"); 6878 return smb2_read_pipe(work); 6879 } 6880 6881 if (work->next_smb2_rcv_hdr_off) { 6882 req = ksmbd_req_buf_next(work); 6883 rsp = ksmbd_resp_buf_next(work); 6884 if (!has_file_id(req->VolatileFileId)) { 6885 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6886 work->compound_fid); 6887 id = work->compound_fid; 6888 pid = work->compound_pfid; 6889 } 6890 } else { 6891 req = smb_get_msg(work->request_buf); 6892 rsp = smb_get_msg(work->response_buf); 6893 } 6894 6895 if (!has_file_id(id)) { 6896 id = req->VolatileFileId; 6897 pid = req->PersistentFileId; 6898 } 6899 6900 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6901 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6902 is_rdma_channel = true; 6903 max_read_size = get_smbd_max_read_write_size(work->conn->transport); 6904 if (max_read_size == 0) { 6905 err = -EINVAL; 6906 goto out; 6907 } 6908 } 6909 6910 if (is_rdma_channel == true) { 6911 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6912 6913 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6914 err = -EINVAL; 6915 goto out; 6916 } 6917 err = smb2_set_remote_key_for_rdma(work, 6918 (struct smbdirect_buffer_descriptor_v1 *) 6919 ((char *)req + ch_offset), 6920 req->Channel, 6921 req->ReadChannelInfoLength); 6922 if (err) 6923 goto out; 6924 } 6925 6926 fp = ksmbd_lookup_fd_slow(work, id, pid); 6927 if (!fp) { 6928 err = -ENOENT; 6929 goto out; 6930 } 6931 6932 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6933 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6934 err = -EACCES; 6935 goto out; 6936 } 6937 6938 offset = le64_to_cpu(req->Offset); 6939 if (offset < 0) { 6940 err = -EINVAL; 6941 goto out; 6942 } 6943 length = le32_to_cpu(req->Length); 6944 mincount = le32_to_cpu(req->MinimumCount); 6945 6946 if (length > max_read_size) { 6947 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6948 max_read_size); 6949 err = -EINVAL; 6950 goto out; 6951 } 6952 6953 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6954 fp->filp, offset, length); 6955 6956 aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP); 6957 if (!aux_payload_buf) { 6958 err = -ENOMEM; 6959 goto out; 6960 } 6961 6962 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6963 if (nbytes < 0) { 6964 kvfree(aux_payload_buf); 6965 err = nbytes; 6966 goto out; 6967 } 6968 6969 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6970 kvfree(aux_payload_buf); 6971 rsp->hdr.Status = STATUS_END_OF_FILE; 6972 smb2_set_err_rsp(work); 6973 ksmbd_fd_put(work, fp); 6974 return -ENODATA; 6975 } 6976 6977 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6978 nbytes, offset, mincount); 6979 6980 if (is_rdma_channel == true) { 6981 /* write data to the client using rdma channel */ 6982 remain_bytes = smb2_read_rdma_channel(work, req, 6983 aux_payload_buf, 6984 nbytes); 6985 kvfree(aux_payload_buf); 6986 aux_payload_buf = NULL; 6987 nbytes = 0; 6988 if (remain_bytes < 0) { 6989 err = (int)remain_bytes; 6990 goto out; 6991 } 6992 } 6993 6994 rsp->StructureSize = cpu_to_le16(17); 6995 rsp->DataOffset = 80; 6996 rsp->Reserved = 0; 6997 rsp->DataLength = cpu_to_le32(nbytes); 6998 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6999 rsp->Flags = 0; 7000 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 7001 offsetof(struct smb2_read_rsp, Buffer), 7002 aux_payload_buf, nbytes); 7003 if (err) { 7004 kvfree(aux_payload_buf); 7005 goto out; 7006 } 7007 ksmbd_fd_put(work, fp); 7008 return 0; 7009 7010 out: 7011 if (err) { 7012 if (err == -EISDIR) 7013 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 7014 else if (err == -EAGAIN) 7015 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7016 else if (err == -ENOENT) 7017 rsp->hdr.Status = STATUS_FILE_CLOSED; 7018 else if (err == -EACCES) 7019 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7020 else if (err == -ESHARE) 7021 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 7022 else if (err == -EINVAL) 7023 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7024 else 7025 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7026 7027 smb2_set_err_rsp(work); 7028 } 7029 ksmbd_fd_put(work, fp); 7030 return err; 7031 } 7032 7033 /** 7034 * smb2_write_pipe() - handler for smb2 write on IPC pipe 7035 * @work: smb work containing write IPC pipe command buffer 7036 * 7037 * Return: 0 on success, otherwise error 7038 */ 7039 static noinline int smb2_write_pipe(struct ksmbd_work *work) 7040 { 7041 struct smb2_write_req *req; 7042 struct smb2_write_rsp *rsp; 7043 struct ksmbd_rpc_command *rpc_resp; 7044 u64 id = 0; 7045 int err = 0, ret = 0; 7046 char *data_buf; 7047 size_t length; 7048 7049 WORK_BUFFERS(work, req, rsp); 7050 7051 length = le32_to_cpu(req->Length); 7052 id = req->VolatileFileId; 7053 7054 if ((u64)le16_to_cpu(req->DataOffset) + length > 7055 get_rfc1002_len(work->request_buf)) { 7056 pr_err("invalid write data offset %u, smb_len %u\n", 7057 le16_to_cpu(req->DataOffset), 7058 get_rfc1002_len(work->request_buf)); 7059 err = -EINVAL; 7060 goto out; 7061 } 7062 7063 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7064 le16_to_cpu(req->DataOffset)); 7065 7066 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 7067 if (rpc_resp) { 7068 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7069 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7070 kvfree(rpc_resp); 7071 smb2_set_err_rsp(work); 7072 return -EOPNOTSUPP; 7073 } 7074 if (rpc_resp->flags != KSMBD_RPC_OK) { 7075 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7076 smb2_set_err_rsp(work); 7077 kvfree(rpc_resp); 7078 return ret; 7079 } 7080 kvfree(rpc_resp); 7081 } 7082 7083 rsp->StructureSize = cpu_to_le16(17); 7084 rsp->DataOffset = 0; 7085 rsp->Reserved = 0; 7086 rsp->DataLength = cpu_to_le32(length); 7087 rsp->DataRemaining = 0; 7088 rsp->Reserved2 = 0; 7089 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 7090 offsetof(struct smb2_write_rsp, Buffer)); 7091 out: 7092 if (err) { 7093 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7094 smb2_set_err_rsp(work); 7095 } 7096 7097 return err; 7098 } 7099 7100 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 7101 struct smb2_write_req *req, 7102 struct ksmbd_file *fp, 7103 loff_t offset, size_t length, bool sync) 7104 { 7105 char *data_buf; 7106 int ret; 7107 ssize_t nbytes; 7108 7109 data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP); 7110 if (!data_buf) 7111 return -ENOMEM; 7112 7113 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 7114 (struct smbdirect_buffer_descriptor_v1 *) 7115 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 7116 le16_to_cpu(req->WriteChannelInfoLength)); 7117 if (ret < 0) { 7118 kvfree(data_buf); 7119 return ret; 7120 } 7121 7122 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 7123 kvfree(data_buf); 7124 if (ret < 0) 7125 return ret; 7126 7127 return nbytes; 7128 } 7129 7130 /** 7131 * smb2_write() - handler for smb2 write from file 7132 * @work: smb work containing write command buffer 7133 * 7134 * Return: 0 on success, otherwise error 7135 */ 7136 int smb2_write(struct ksmbd_work *work) 7137 { 7138 struct smb2_write_req *req; 7139 struct smb2_write_rsp *rsp; 7140 struct ksmbd_file *fp = NULL; 7141 loff_t offset; 7142 size_t length; 7143 ssize_t nbytes; 7144 char *data_buf; 7145 bool writethrough = false, is_rdma_channel = false; 7146 int err = 0; 7147 unsigned int max_write_size = work->conn->vals->max_write_size; 7148 7149 ksmbd_debug(SMB, "Received smb2 write request\n"); 7150 7151 WORK_BUFFERS(work, req, rsp); 7152 7153 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 7154 ksmbd_debug(SMB, "IPC pipe write request\n"); 7155 return smb2_write_pipe(work); 7156 } 7157 7158 offset = le64_to_cpu(req->Offset); 7159 if (offset < 0) 7160 return -EINVAL; 7161 length = le32_to_cpu(req->Length); 7162 7163 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 7164 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 7165 is_rdma_channel = true; 7166 max_write_size = get_smbd_max_read_write_size(work->conn->transport); 7167 if (max_write_size == 0) { 7168 err = -EINVAL; 7169 goto out; 7170 } 7171 length = le32_to_cpu(req->RemainingBytes); 7172 } 7173 7174 if (is_rdma_channel == true) { 7175 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 7176 7177 if (req->Length != 0 || req->DataOffset != 0 || 7178 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 7179 err = -EINVAL; 7180 goto out; 7181 } 7182 err = smb2_set_remote_key_for_rdma(work, 7183 (struct smbdirect_buffer_descriptor_v1 *) 7184 ((char *)req + ch_offset), 7185 req->Channel, 7186 req->WriteChannelInfoLength); 7187 if (err) 7188 goto out; 7189 } 7190 7191 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7192 ksmbd_debug(SMB, "User does not have write permission\n"); 7193 err = -EACCES; 7194 goto out; 7195 } 7196 7197 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7198 if (!fp) { 7199 err = -ENOENT; 7200 goto out; 7201 } 7202 7203 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 7204 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 7205 err = -EACCES; 7206 goto out; 7207 } 7208 7209 if (length > max_write_size) { 7210 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 7211 max_write_size); 7212 err = -EINVAL; 7213 goto out; 7214 } 7215 7216 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 7217 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 7218 writethrough = true; 7219 7220 if (is_rdma_channel == false) { 7221 if (le16_to_cpu(req->DataOffset) < 7222 offsetof(struct smb2_write_req, Buffer)) { 7223 err = -EINVAL; 7224 goto out; 7225 } 7226 7227 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 7228 le16_to_cpu(req->DataOffset)); 7229 7230 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 7231 fp->filp, offset, length); 7232 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 7233 writethrough, &nbytes); 7234 if (err < 0) 7235 goto out; 7236 } else { 7237 /* read data from the client using rdma channel, and 7238 * write the data. 7239 */ 7240 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 7241 writethrough); 7242 if (nbytes < 0) { 7243 err = (int)nbytes; 7244 goto out; 7245 } 7246 } 7247 7248 rsp->StructureSize = cpu_to_le16(17); 7249 rsp->DataOffset = 0; 7250 rsp->Reserved = 0; 7251 rsp->DataLength = cpu_to_le32(nbytes); 7252 rsp->DataRemaining = 0; 7253 rsp->Reserved2 = 0; 7254 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 7255 if (err) 7256 goto out; 7257 ksmbd_fd_put(work, fp); 7258 return 0; 7259 7260 out: 7261 if (err == -EAGAIN) 7262 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7263 else if (err == -ENOSPC || err == -EFBIG) 7264 rsp->hdr.Status = STATUS_DISK_FULL; 7265 else if (err == -ENOENT) 7266 rsp->hdr.Status = STATUS_FILE_CLOSED; 7267 else if (err == -EACCES) 7268 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7269 else if (err == -ESHARE) 7270 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 7271 else if (err == -EINVAL) 7272 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7273 else 7274 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7275 7276 smb2_set_err_rsp(work); 7277 ksmbd_fd_put(work, fp); 7278 return err; 7279 } 7280 7281 /** 7282 * smb2_flush() - handler for smb2 flush file - fsync 7283 * @work: smb work containing flush command buffer 7284 * 7285 * Return: 0 on success, otherwise error 7286 */ 7287 int smb2_flush(struct ksmbd_work *work) 7288 { 7289 struct smb2_flush_req *req; 7290 struct smb2_flush_rsp *rsp; 7291 int err; 7292 7293 WORK_BUFFERS(work, req, rsp); 7294 7295 ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId); 7296 7297 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 7298 if (err) 7299 goto out; 7300 7301 rsp->StructureSize = cpu_to_le16(4); 7302 rsp->Reserved = 0; 7303 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 7304 7305 out: 7306 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7307 smb2_set_err_rsp(work); 7308 return err; 7309 } 7310 7311 /** 7312 * smb2_cancel() - handler for smb2 cancel command 7313 * @work: smb work containing cancel command buffer 7314 * 7315 * Return: 0 on success, otherwise error 7316 */ 7317 int smb2_cancel(struct ksmbd_work *work) 7318 { 7319 struct ksmbd_conn *conn = work->conn; 7320 struct smb2_hdr *hdr = smb_get_msg(work->request_buf); 7321 struct smb2_hdr *chdr; 7322 struct ksmbd_work *iter; 7323 struct list_head *command_list; 7324 7325 if (work->next_smb2_rcv_hdr_off) 7326 hdr = ksmbd_resp_buf_next(work); 7327 7328 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 7329 hdr->MessageId, hdr->Flags); 7330 7331 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 7332 command_list = &conn->async_requests; 7333 7334 spin_lock(&conn->request_lock); 7335 list_for_each_entry(iter, command_list, 7336 async_request_entry) { 7337 chdr = smb_get_msg(iter->request_buf); 7338 7339 if (iter->async_id != 7340 le64_to_cpu(hdr->Id.AsyncId)) 7341 continue; 7342 7343 /* 7344 * A cancelled deferred byte-range lock frees its 7345 * file_lock and takes the smb2_lock() early-exit that 7346 * skips release_async_work(), so the work stays on 7347 * conn->async_requests with a live cancel_fn pointing 7348 * at the freed file_lock. Re-firing it on a second 7349 * SMB2_CANCEL is a use-after-free. 7350 */ 7351 if (iter->state == KSMBD_WORK_CANCELLED) 7352 break; 7353 7354 ksmbd_debug(SMB, 7355 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 7356 le64_to_cpu(hdr->Id.AsyncId), 7357 le16_to_cpu(chdr->Command)); 7358 iter->state = KSMBD_WORK_CANCELLED; 7359 if (iter->cancel_fn) 7360 iter->cancel_fn(iter->cancel_argv); 7361 break; 7362 } 7363 spin_unlock(&conn->request_lock); 7364 } else { 7365 command_list = &conn->requests; 7366 7367 spin_lock(&conn->request_lock); 7368 list_for_each_entry(iter, command_list, request_entry) { 7369 chdr = smb_get_msg(iter->request_buf); 7370 7371 if (chdr->MessageId != hdr->MessageId || 7372 iter == work) 7373 continue; 7374 7375 ksmbd_debug(SMB, 7376 "smb2 with mid %llu cancelled command = 0x%x\n", 7377 le64_to_cpu(hdr->MessageId), 7378 le16_to_cpu(chdr->Command)); 7379 iter->state = KSMBD_WORK_CANCELLED; 7380 break; 7381 } 7382 spin_unlock(&conn->request_lock); 7383 } 7384 7385 /* For SMB2_CANCEL command itself send no response*/ 7386 work->send_no_response = 1; 7387 return 0; 7388 } 7389 7390 struct file_lock *smb_flock_init(struct file *f) 7391 { 7392 struct file_lock *fl; 7393 7394 fl = locks_alloc_lock(); 7395 if (!fl) 7396 goto out; 7397 7398 locks_init_lock(fl); 7399 7400 fl->c.flc_owner = f; 7401 fl->c.flc_pid = current->tgid; 7402 fl->c.flc_file = f; 7403 fl->c.flc_flags = FL_POSIX; 7404 fl->fl_ops = NULL; 7405 fl->fl_lmops = NULL; 7406 7407 out: 7408 return fl; 7409 } 7410 7411 static int smb2_set_flock_flags(struct file_lock *flock, int flags) 7412 { 7413 int cmd = -EINVAL; 7414 7415 /* Checking for wrong flag combination during lock request*/ 7416 switch (flags) { 7417 case SMB2_LOCKFLAG_SHARED: 7418 ksmbd_debug(SMB, "received shared request\n"); 7419 cmd = F_SETLKW; 7420 flock->c.flc_type = F_RDLCK; 7421 flock->c.flc_flags |= FL_SLEEP; 7422 break; 7423 case SMB2_LOCKFLAG_EXCLUSIVE: 7424 ksmbd_debug(SMB, "received exclusive request\n"); 7425 cmd = F_SETLKW; 7426 flock->c.flc_type = F_WRLCK; 7427 flock->c.flc_flags |= FL_SLEEP; 7428 break; 7429 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7430 ksmbd_debug(SMB, 7431 "received shared & fail immediately request\n"); 7432 cmd = F_SETLK; 7433 flock->c.flc_type = F_RDLCK; 7434 break; 7435 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 7436 ksmbd_debug(SMB, 7437 "received exclusive & fail immediately request\n"); 7438 cmd = F_SETLK; 7439 flock->c.flc_type = F_WRLCK; 7440 break; 7441 case SMB2_LOCKFLAG_UNLOCK: 7442 ksmbd_debug(SMB, "received unlock request\n"); 7443 flock->c.flc_type = F_UNLCK; 7444 cmd = F_SETLK; 7445 break; 7446 } 7447 7448 return cmd; 7449 } 7450 7451 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 7452 unsigned int cmd, int flags, 7453 struct list_head *lock_list) 7454 { 7455 struct ksmbd_lock *lock; 7456 7457 lock = kzalloc_obj(struct ksmbd_lock, KSMBD_DEFAULT_GFP); 7458 if (!lock) 7459 return NULL; 7460 7461 lock->cmd = cmd; 7462 lock->fl = flock; 7463 lock->start = flock->fl_start; 7464 lock->end = flock->fl_end; 7465 lock->flags = flags; 7466 if (lock->start == lock->end) 7467 lock->zero_len = 1; 7468 INIT_LIST_HEAD(&lock->clist); 7469 INIT_LIST_HEAD(&lock->flist); 7470 INIT_LIST_HEAD(&lock->llist); 7471 list_add_tail(&lock->llist, lock_list); 7472 7473 return lock; 7474 } 7475 7476 static void smb2_remove_blocked_lock(void **argv) 7477 { 7478 struct file_lock *flock = (struct file_lock *)argv[0]; 7479 7480 ksmbd_vfs_posix_lock_unblock(flock); 7481 locks_wake_up(flock); 7482 } 7483 7484 static inline bool lock_defer_pending(struct file_lock *fl) 7485 { 7486 /* check pending lock waiters */ 7487 return waitqueue_active(&fl->c.flc_wait); 7488 } 7489 7490 /** 7491 * smb2_lock() - handler for smb2 file lock command 7492 * @work: smb work containing lock command buffer 7493 * 7494 * Return: 0 on success, otherwise error 7495 */ 7496 int smb2_lock(struct ksmbd_work *work) 7497 { 7498 struct smb2_lock_req *req; 7499 struct smb2_lock_rsp *rsp; 7500 struct smb2_lock_element *lock_ele; 7501 struct ksmbd_file *fp = NULL; 7502 struct file_lock *flock = NULL; 7503 struct file *filp = NULL; 7504 int lock_count; 7505 int flags = 0; 7506 int cmd = 0; 7507 int err = -EIO, i, rc = 0; 7508 u64 lock_start, lock_length; 7509 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 7510 struct ksmbd_conn *conn; 7511 int nolock = 0; 7512 LIST_HEAD(lock_list); 7513 LIST_HEAD(rollback_list); 7514 int prior_lock = 0, bkt; 7515 7516 WORK_BUFFERS(work, req, rsp); 7517 7518 ksmbd_debug(SMB, "Received smb2 lock request\n"); 7519 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7520 if (!fp) { 7521 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 7522 err = -ENOENT; 7523 goto out2; 7524 } 7525 7526 filp = fp->filp; 7527 lock_count = le16_to_cpu(req->LockCount); 7528 lock_ele = req->locks; 7529 7530 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 7531 /* 7532 * Cap lock_count at 64. The MS-SMB2 spec defines Open.LockSequenceArray 7533 * as exactly 64 entries so 64 is the intended ceiling. No real workload 7534 * comes close to this in a single request. 7535 */ 7536 if (!lock_count || lock_count > 64) { 7537 err = -EINVAL; 7538 goto out2; 7539 } 7540 7541 for (i = 0; i < lock_count; i++) { 7542 flags = le32_to_cpu(lock_ele[i].Flags); 7543 7544 flock = smb_flock_init(filp); 7545 if (!flock) 7546 goto out; 7547 7548 cmd = smb2_set_flock_flags(flock, flags); 7549 7550 lock_start = le64_to_cpu(lock_ele[i].Offset); 7551 lock_length = le64_to_cpu(lock_ele[i].Length); 7552 if (lock_start > U64_MAX - lock_length) { 7553 pr_err("Invalid lock range requested\n"); 7554 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7555 locks_free_lock(flock); 7556 goto out; 7557 } 7558 7559 if (lock_start > OFFSET_MAX) 7560 flock->fl_start = OFFSET_MAX; 7561 else 7562 flock->fl_start = lock_start; 7563 7564 lock_length = le64_to_cpu(lock_ele[i].Length); 7565 if (lock_length > OFFSET_MAX - flock->fl_start) 7566 lock_length = OFFSET_MAX - flock->fl_start; 7567 7568 flock->fl_end = flock->fl_start + lock_length; 7569 7570 if (flock->fl_end < flock->fl_start) { 7571 ksmbd_debug(SMB, 7572 "the end offset(%llx) is smaller than the start offset(%llx)\n", 7573 flock->fl_end, flock->fl_start); 7574 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 7575 locks_free_lock(flock); 7576 goto out; 7577 } 7578 7579 /* Check conflict locks in one request */ 7580 list_for_each_entry(cmp_lock, &lock_list, llist) { 7581 if (cmp_lock->fl->fl_start <= flock->fl_start && 7582 cmp_lock->fl->fl_end >= flock->fl_end) { 7583 if (cmp_lock->fl->c.flc_type != F_UNLCK && 7584 flock->c.flc_type != F_UNLCK) { 7585 pr_err("conflict two locks in one request\n"); 7586 err = -EINVAL; 7587 locks_free_lock(flock); 7588 goto out; 7589 } 7590 } 7591 } 7592 7593 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 7594 if (!smb_lock) { 7595 err = -EINVAL; 7596 locks_free_lock(flock); 7597 goto out; 7598 } 7599 } 7600 7601 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7602 if (smb_lock->cmd < 0) { 7603 err = -EINVAL; 7604 goto out; 7605 } 7606 7607 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 7608 err = -EINVAL; 7609 goto out; 7610 } 7611 7612 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 7613 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 7614 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 7615 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 7616 err = -EINVAL; 7617 goto out; 7618 } 7619 7620 prior_lock = smb_lock->flags; 7621 7622 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 7623 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 7624 goto no_check_cl; 7625 7626 nolock = 1; 7627 /* check locks in connection list */ 7628 down_read(&conn_list_lock); 7629 hash_for_each(conn_list, bkt, conn, hlist) { 7630 spin_lock(&conn->llist_lock); 7631 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 7632 if (file_inode(cmp_lock->fl->c.flc_file) != 7633 file_inode(smb_lock->fl->c.flc_file)) 7634 continue; 7635 7636 if (lock_is_unlock(smb_lock->fl)) { 7637 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && 7638 cmp_lock->start == smb_lock->start && 7639 cmp_lock->end == smb_lock->end && 7640 !lock_defer_pending(cmp_lock->fl)) { 7641 nolock = 0; 7642 list_del(&cmp_lock->flist); 7643 list_del(&cmp_lock->clist); 7644 spin_unlock(&conn->llist_lock); 7645 up_read(&conn_list_lock); 7646 7647 locks_free_lock(cmp_lock->fl); 7648 kfree(cmp_lock); 7649 goto out_check_cl; 7650 } 7651 continue; 7652 } 7653 7654 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { 7655 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7656 continue; 7657 } else { 7658 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7659 continue; 7660 } 7661 7662 /* check zero byte lock range */ 7663 if (cmp_lock->zero_len && !smb_lock->zero_len && 7664 cmp_lock->start > smb_lock->start && 7665 cmp_lock->start < smb_lock->end) { 7666 spin_unlock(&conn->llist_lock); 7667 up_read(&conn_list_lock); 7668 pr_err("previous lock conflict with zero byte lock range\n"); 7669 goto out; 7670 } 7671 7672 if (smb_lock->zero_len && !cmp_lock->zero_len && 7673 smb_lock->start > cmp_lock->start && 7674 smb_lock->start < cmp_lock->end) { 7675 spin_unlock(&conn->llist_lock); 7676 up_read(&conn_list_lock); 7677 pr_err("current lock conflict with zero byte lock range\n"); 7678 goto out; 7679 } 7680 7681 if (((cmp_lock->start <= smb_lock->start && 7682 cmp_lock->end > smb_lock->start) || 7683 (cmp_lock->start < smb_lock->end && 7684 cmp_lock->end >= smb_lock->end)) && 7685 !cmp_lock->zero_len && !smb_lock->zero_len) { 7686 spin_unlock(&conn->llist_lock); 7687 up_read(&conn_list_lock); 7688 pr_err("Not allow lock operation on exclusive lock range\n"); 7689 goto out; 7690 } 7691 } 7692 spin_unlock(&conn->llist_lock); 7693 } 7694 up_read(&conn_list_lock); 7695 out_check_cl: 7696 if (lock_is_unlock(smb_lock->fl) && nolock) { 7697 pr_err("Try to unlock nolocked range\n"); 7698 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7699 goto out; 7700 } 7701 7702 no_check_cl: 7703 flock = smb_lock->fl; 7704 list_del(&smb_lock->llist); 7705 7706 if (smb_lock->zero_len) { 7707 err = 0; 7708 goto skip; 7709 } 7710 retry: 7711 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7712 skip: 7713 if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) { 7714 locks_free_lock(flock); 7715 kfree(smb_lock); 7716 if (!rc) { 7717 ksmbd_debug(SMB, "File unlocked\n"); 7718 } else if (rc == -ENOENT) { 7719 rsp->hdr.Status = STATUS_NOT_LOCKED; 7720 err = rc; 7721 goto out; 7722 } 7723 } else { 7724 if (rc == FILE_LOCK_DEFERRED) { 7725 void **argv; 7726 7727 ksmbd_debug(SMB, 7728 "would have to wait for getting lock\n"); 7729 list_add(&smb_lock->llist, &rollback_list); 7730 7731 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP); 7732 if (!argv) { 7733 err = -ENOMEM; 7734 goto out; 7735 } 7736 argv[0] = flock; 7737 7738 rc = setup_async_work(work, 7739 smb2_remove_blocked_lock, 7740 argv); 7741 if (rc) { 7742 kfree(argv); 7743 err = -ENOMEM; 7744 goto out; 7745 } 7746 spin_lock(&fp->f_lock); 7747 list_add(&work->fp_entry, &fp->blocked_works); 7748 spin_unlock(&fp->f_lock); 7749 7750 smb2_send_interim_resp(work, STATUS_PENDING); 7751 7752 ksmbd_vfs_posix_lock_wait(flock); 7753 7754 spin_lock(&fp->f_lock); 7755 list_del(&work->fp_entry); 7756 spin_unlock(&fp->f_lock); 7757 7758 if (work->state != KSMBD_WORK_ACTIVE) { 7759 list_del(&smb_lock->llist); 7760 locks_free_lock(flock); 7761 7762 if (work->state == KSMBD_WORK_CANCELLED) { 7763 rsp->hdr.Status = 7764 STATUS_CANCELLED; 7765 kfree(smb_lock); 7766 smb2_send_interim_resp(work, 7767 STATUS_CANCELLED); 7768 work->send_no_response = 1; 7769 goto out; 7770 } 7771 7772 rsp->hdr.Status = 7773 STATUS_RANGE_NOT_LOCKED; 7774 kfree(smb_lock); 7775 goto out2; 7776 } 7777 7778 list_del(&smb_lock->llist); 7779 release_async_work(work); 7780 goto retry; 7781 } else if (!rc) { 7782 list_add(&smb_lock->llist, &rollback_list); 7783 spin_lock(&work->conn->llist_lock); 7784 list_add_tail(&smb_lock->clist, 7785 &work->conn->lock_list); 7786 list_add_tail(&smb_lock->flist, 7787 &fp->lock_list); 7788 spin_unlock(&work->conn->llist_lock); 7789 ksmbd_debug(SMB, "successful in taking lock\n"); 7790 } else { 7791 locks_free_lock(flock); 7792 kfree(smb_lock); 7793 err = rc; 7794 goto out; 7795 } 7796 } 7797 } 7798 7799 if (atomic_read(&fp->f_ci->op_count) > 1) 7800 smb_break_all_oplock(work, fp); 7801 7802 rsp->StructureSize = cpu_to_le16(4); 7803 ksmbd_debug(SMB, "successful in taking lock\n"); 7804 rsp->hdr.Status = STATUS_SUCCESS; 7805 rsp->Reserved = 0; 7806 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7807 if (err) 7808 goto out; 7809 7810 ksmbd_fd_put(work, fp); 7811 return 0; 7812 7813 out: 7814 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7815 locks_free_lock(smb_lock->fl); 7816 list_del(&smb_lock->llist); 7817 kfree(smb_lock); 7818 } 7819 7820 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7821 struct file_lock *rlock = NULL; 7822 7823 rlock = smb_flock_init(filp); 7824 if (rlock) { 7825 rlock->c.flc_type = F_UNLCK; 7826 rlock->fl_start = smb_lock->start; 7827 rlock->fl_end = smb_lock->end; 7828 7829 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7830 if (rc) 7831 pr_err("rollback unlock fail : %d\n", rc); 7832 } else { 7833 pr_err("rollback unlock alloc failed\n"); 7834 } 7835 7836 list_del(&smb_lock->llist); 7837 spin_lock(&work->conn->llist_lock); 7838 if (!list_empty(&smb_lock->flist)) 7839 list_del(&smb_lock->flist); 7840 list_del(&smb_lock->clist); 7841 spin_unlock(&work->conn->llist_lock); 7842 7843 locks_free_lock(smb_lock->fl); 7844 if (rlock) 7845 locks_free_lock(rlock); 7846 kfree(smb_lock); 7847 } 7848 out2: 7849 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7850 7851 if (!rsp->hdr.Status) { 7852 if (err == -EINVAL) 7853 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7854 else if (err == -ENOMEM) 7855 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7856 else if (err == -ENOENT) 7857 rsp->hdr.Status = STATUS_FILE_CLOSED; 7858 else 7859 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7860 } 7861 7862 smb2_set_err_rsp(work); 7863 ksmbd_fd_put(work, fp); 7864 return err; 7865 } 7866 7867 static int fsctl_copychunk(struct ksmbd_work *work, 7868 struct copychunk_ioctl_req *ci_req, 7869 unsigned int cnt_code, 7870 unsigned int input_count, 7871 unsigned long long volatile_id, 7872 unsigned long long persistent_id, 7873 struct smb2_ioctl_rsp *rsp) 7874 { 7875 struct copychunk_ioctl_rsp *ci_rsp; 7876 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7877 struct srv_copychunk *chunks; 7878 unsigned int i, chunk_count, chunk_count_written = 0; 7879 unsigned int chunk_size_written = 0; 7880 loff_t total_size_written = 0; 7881 int ret = 0; 7882 7883 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7884 7885 rsp->VolatileFileId = volatile_id; 7886 rsp->PersistentFileId = persistent_id; 7887 ci_rsp->ChunksWritten = 7888 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7889 ci_rsp->ChunkBytesWritten = 7890 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7891 ci_rsp->TotalBytesWritten = 7892 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7893 7894 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7895 if (chunk_count == 0) 7896 goto out; 7897 total_size_written = 0; 7898 7899 /* verify the SRV_COPYCHUNK_COPY packet */ 7900 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7901 input_count < struct_size(ci_req, Chunks, chunk_count)) { 7902 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7903 return -EINVAL; 7904 } 7905 7906 chunks = &ci_req->Chunks[0]; 7907 for (i = 0; i < chunk_count; i++) { 7908 if (le32_to_cpu(chunks[i].Length) == 0 || 7909 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7910 break; 7911 total_size_written += le32_to_cpu(chunks[i].Length); 7912 } 7913 7914 if (i < chunk_count || 7915 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7916 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7917 return -EINVAL; 7918 } 7919 7920 src_fp = ksmbd_lookup_foreign_fd(work, 7921 le64_to_cpu(ci_req->SourceKeyU64[0])); 7922 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7923 ret = -EINVAL; 7924 if (!src_fp || 7925 src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) { 7926 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7927 goto out; 7928 } 7929 7930 if (!dst_fp) { 7931 rsp->hdr.Status = STATUS_FILE_CLOSED; 7932 goto out; 7933 } 7934 7935 /* 7936 * FILE_READ_DATA should only be included in 7937 * the FSCTL_COPYCHUNK case 7938 */ 7939 if (cnt_code == FSCTL_COPYCHUNK && 7940 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7941 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7942 goto out; 7943 } 7944 7945 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7946 chunks, chunk_count, 7947 &chunk_count_written, 7948 &chunk_size_written, 7949 &total_size_written); 7950 if (ret < 0) { 7951 if (ret == -EACCES) 7952 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7953 if (ret == -EAGAIN) 7954 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7955 else if (ret == -EBADF) 7956 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7957 else if (ret == -EFBIG || ret == -ENOSPC) 7958 rsp->hdr.Status = STATUS_DISK_FULL; 7959 else if (ret == -EINVAL) 7960 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7961 else if (ret == -EISDIR) 7962 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7963 else if (ret == -E2BIG) 7964 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7965 else 7966 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7967 } 7968 7969 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7970 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7971 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7972 out: 7973 ksmbd_fd_put(work, src_fp); 7974 ksmbd_fd_put(work, dst_fp); 7975 return ret; 7976 } 7977 7978 static __be32 idev_ipv4_address(struct in_device *idev) 7979 { 7980 __be32 addr = 0; 7981 7982 struct in_ifaddr *ifa; 7983 7984 rcu_read_lock(); 7985 in_dev_for_each_ifa_rcu(ifa, idev) { 7986 if (ifa->ifa_flags & IFA_F_SECONDARY) 7987 continue; 7988 7989 addr = ifa->ifa_address; 7990 break; 7991 } 7992 rcu_read_unlock(); 7993 return addr; 7994 } 7995 7996 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7997 struct smb2_ioctl_rsp *rsp, 7998 unsigned int out_buf_len) 7999 { 8000 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 8001 int nbytes = 0; 8002 struct net_device *netdev; 8003 struct sockaddr_storage_rsp *sockaddr_storage; 8004 unsigned int flags; 8005 unsigned long long speed; 8006 8007 rtnl_lock(); 8008 for_each_netdev(&init_net, netdev) { 8009 bool ipv4_set = false; 8010 8011 if (netdev->type == ARPHRD_LOOPBACK) 8012 continue; 8013 8014 if (!ksmbd_find_netdev_name_iface_list(netdev->name)) 8015 continue; 8016 8017 flags = netif_get_flags(netdev); 8018 if (!(flags & IFF_RUNNING)) 8019 continue; 8020 ipv6_retry: 8021 if (out_buf_len < 8022 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 8023 rtnl_unlock(); 8024 return -ENOSPC; 8025 } 8026 8027 nii_rsp = (struct network_interface_info_ioctl_rsp *) 8028 &rsp->Buffer[nbytes]; 8029 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 8030 8031 nii_rsp->Capability = 0; 8032 if (netdev->real_num_tx_queues > 1) 8033 nii_rsp->Capability |= RSS_CAPABLE; 8034 if (ksmbd_rdma_capable_netdev(netdev)) 8035 nii_rsp->Capability |= RDMA_CAPABLE; 8036 8037 nii_rsp->Next = cpu_to_le32(152); 8038 nii_rsp->Reserved = 0; 8039 8040 if (netdev->ethtool_ops->get_link_ksettings) { 8041 struct ethtool_link_ksettings cmd; 8042 8043 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 8044 speed = cmd.base.speed; 8045 } else { 8046 ksmbd_debug(SMB, "%s %s\n", netdev->name, 8047 "speed is unknown, defaulting to 1Gb/sec"); 8048 speed = SPEED_1000; 8049 } 8050 8051 speed *= 1000000; 8052 nii_rsp->LinkSpeed = cpu_to_le64(speed); 8053 8054 sockaddr_storage = (struct sockaddr_storage_rsp *) 8055 nii_rsp->SockAddr_Storage; 8056 memset(sockaddr_storage, 0, 128); 8057 8058 if (!ipv4_set) { 8059 struct in_device *idev; 8060 8061 sockaddr_storage->Family = INTERNETWORK; 8062 sockaddr_storage->addr4.Port = 0; 8063 8064 idev = __in_dev_get_rtnl(netdev); 8065 if (!idev) 8066 continue; 8067 sockaddr_storage->addr4.IPv4Address = 8068 idev_ipv4_address(idev); 8069 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 8070 ipv4_set = true; 8071 goto ipv6_retry; 8072 } else { 8073 struct inet6_dev *idev6; 8074 struct inet6_ifaddr *ifa; 8075 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6Address; 8076 8077 sockaddr_storage->Family = INTERNETWORKV6; 8078 sockaddr_storage->addr6.Port = 0; 8079 sockaddr_storage->addr6.FlowInfo = 0; 8080 8081 idev6 = __in6_dev_get(netdev); 8082 if (!idev6) 8083 continue; 8084 8085 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 8086 if (ifa->flags & (IFA_F_TENTATIVE | 8087 IFA_F_DEPRECATED)) 8088 continue; 8089 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 8090 break; 8091 } 8092 sockaddr_storage->addr6.ScopeId = 0; 8093 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 8094 } 8095 } 8096 rtnl_unlock(); 8097 8098 /* zero if this is last one */ 8099 if (nii_rsp) 8100 nii_rsp->Next = 0; 8101 8102 rsp->PersistentFileId = SMB2_NO_FID; 8103 rsp->VolatileFileId = SMB2_NO_FID; 8104 return nbytes; 8105 } 8106 8107 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 8108 struct validate_negotiate_info_req *neg_req, 8109 struct validate_negotiate_info_rsp *neg_rsp, 8110 unsigned int in_buf_len) 8111 { 8112 int ret = 0; 8113 int dialect; 8114 8115 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 8116 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 8117 return -EINVAL; 8118 8119 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 8120 neg_req->DialectCount); 8121 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 8122 ret = -EINVAL; 8123 goto err_out; 8124 } 8125 8126 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 8127 ret = -EINVAL; 8128 goto err_out; 8129 } 8130 8131 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 8132 ret = -EINVAL; 8133 goto err_out; 8134 } 8135 8136 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 8137 ret = -EINVAL; 8138 goto err_out; 8139 } 8140 8141 neg_rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); 8142 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 8143 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 8144 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 8145 err_out: 8146 return ret; 8147 } 8148 8149 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 8150 struct file_allocated_range_buffer *qar_req, 8151 struct file_allocated_range_buffer *qar_rsp, 8152 unsigned int in_count, unsigned int *out_count) 8153 { 8154 struct ksmbd_file *fp; 8155 loff_t start, length; 8156 int ret = 0; 8157 8158 *out_count = 0; 8159 if (in_count == 0) 8160 return -EINVAL; 8161 8162 start = le64_to_cpu(qar_req->file_offset); 8163 length = le64_to_cpu(qar_req->length); 8164 8165 if (start < 0 || length < 0) 8166 return -EINVAL; 8167 8168 fp = ksmbd_lookup_fd_fast(work, id); 8169 if (!fp) 8170 return -ENOENT; 8171 8172 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 8173 qar_rsp, in_count, out_count); 8174 if (ret && ret != -E2BIG) 8175 *out_count = 0; 8176 8177 ksmbd_fd_put(work, fp); 8178 return ret; 8179 } 8180 8181 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 8182 unsigned int out_buf_len, 8183 struct smb2_ioctl_req *req, 8184 struct smb2_ioctl_rsp *rsp) 8185 { 8186 struct ksmbd_rpc_command *rpc_resp; 8187 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); 8188 int nbytes = 0; 8189 8190 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 8191 le32_to_cpu(req->InputCount)); 8192 if (rpc_resp) { 8193 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 8194 /* 8195 * set STATUS_SOME_NOT_MAPPED response 8196 * for unknown domain sid. 8197 */ 8198 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 8199 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 8200 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8201 goto out; 8202 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 8203 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8204 goto out; 8205 } 8206 8207 nbytes = rpc_resp->payload_sz; 8208 if (rpc_resp->payload_sz > out_buf_len) { 8209 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8210 nbytes = out_buf_len; 8211 } 8212 8213 if (!rpc_resp->payload_sz) { 8214 rsp->hdr.Status = 8215 STATUS_UNEXPECTED_IO_ERROR; 8216 goto out; 8217 } 8218 8219 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 8220 } 8221 out: 8222 kvfree(rpc_resp); 8223 return nbytes; 8224 } 8225 8226 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 8227 struct file_sparse *sparse) 8228 { 8229 struct ksmbd_file *fp; 8230 struct mnt_idmap *idmap; 8231 int ret = 0; 8232 __le32 old_fattr; 8233 8234 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8235 ksmbd_debug(SMB, "User does not have write permission\n"); 8236 return -EACCES; 8237 } 8238 8239 fp = ksmbd_lookup_fd_fast(work, id); 8240 if (!fp) 8241 return -ENOENT; 8242 8243 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_WRITE_ATTRIBUTES_LE))) { 8244 ret = -EACCES; 8245 goto out; 8246 } 8247 8248 idmap = file_mnt_idmap(fp->filp); 8249 8250 old_fattr = fp->f_ci->m_fattr; 8251 if (sparse->SetSparse) 8252 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 8253 else 8254 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 8255 8256 if (fp->f_ci->m_fattr != old_fattr && 8257 test_share_config_flag(work->tcon->share_conf, 8258 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 8259 struct xattr_dos_attrib da; 8260 8261 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 8262 fp->filp->f_path.dentry, &da); 8263 if (ret <= 0) 8264 goto out; 8265 8266 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 8267 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 8268 &fp->filp->f_path, 8269 &da, true); 8270 if (ret) 8271 fp->f_ci->m_fattr = old_fattr; 8272 } 8273 8274 out: 8275 ksmbd_fd_put(work, fp); 8276 return ret; 8277 } 8278 8279 static int fsctl_request_resume_key(struct ksmbd_work *work, 8280 struct smb2_ioctl_req *req, 8281 struct resume_key_ioctl_rsp *key_rsp) 8282 { 8283 struct ksmbd_file *fp; 8284 8285 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 8286 if (!fp) 8287 return -ENOENT; 8288 8289 memset(key_rsp, 0, sizeof(*key_rsp)); 8290 key_rsp->ResumeKeyU64[0] = req->VolatileFileId; 8291 key_rsp->ResumeKeyU64[1] = req->PersistentFileId; 8292 ksmbd_fd_put(work, fp); 8293 8294 return 0; 8295 } 8296 8297 /** 8298 * smb2_ioctl() - handler for smb2 ioctl command 8299 * @work: smb work containing ioctl command buffer 8300 * 8301 * Return: 0 on success, otherwise error 8302 */ 8303 int smb2_ioctl(struct ksmbd_work *work) 8304 { 8305 struct smb2_ioctl_req *req; 8306 struct smb2_ioctl_rsp *rsp; 8307 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 8308 u64 id = KSMBD_NO_FID; 8309 struct ksmbd_conn *conn = work->conn; 8310 int ret = 0; 8311 char *buffer; 8312 8313 ksmbd_debug(SMB, "Received smb2 ioctl request\n"); 8314 8315 if (work->next_smb2_rcv_hdr_off) { 8316 req = ksmbd_req_buf_next(work); 8317 rsp = ksmbd_resp_buf_next(work); 8318 if (!has_file_id(req->VolatileFileId)) { 8319 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 8320 work->compound_fid); 8321 id = work->compound_fid; 8322 } 8323 } else { 8324 req = smb_get_msg(work->request_buf); 8325 rsp = smb_get_msg(work->response_buf); 8326 } 8327 8328 if (!has_file_id(id)) 8329 id = req->VolatileFileId; 8330 8331 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 8332 ret = -EOPNOTSUPP; 8333 goto out; 8334 } 8335 8336 buffer = (char *)req + le32_to_cpu(req->InputOffset); 8337 8338 cnt_code = le32_to_cpu(req->CtlCode); 8339 ret = smb2_calc_max_out_buf_len(work, 8340 offsetof(struct smb2_ioctl_rsp, Buffer), 8341 le32_to_cpu(req->MaxOutputResponse)); 8342 if (ret < 0) { 8343 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8344 goto out; 8345 } 8346 out_buf_len = (unsigned int)ret; 8347 in_buf_len = le32_to_cpu(req->InputCount); 8348 8349 switch (cnt_code) { 8350 case FSCTL_DFS_GET_REFERRALS: 8351 case FSCTL_DFS_GET_REFERRALS_EX: 8352 /* Not support DFS yet */ 8353 ret = -EOPNOTSUPP; 8354 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 8355 goto out2; 8356 case FSCTL_CREATE_OR_GET_OBJECT_ID: 8357 { 8358 struct file_object_buf_type1_ioctl_rsp *obj_buf; 8359 8360 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 8361 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 8362 &rsp->Buffer[0]; 8363 8364 /* 8365 * TODO: This is dummy implementation to pass smbtorture 8366 * Need to check correct response later 8367 */ 8368 memset(obj_buf->ObjectId, 0x0, 16); 8369 memset(obj_buf->BirthVolumeId, 0x0, 16); 8370 memset(obj_buf->BirthObjectId, 0x0, 16); 8371 memset(obj_buf->DomainId, 0x0, 16); 8372 8373 break; 8374 } 8375 case FSCTL_PIPE_TRANSCEIVE: 8376 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 8377 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 8378 break; 8379 case FSCTL_VALIDATE_NEGOTIATE_INFO: 8380 if (conn->dialect < SMB30_PROT_ID) { 8381 ret = -EOPNOTSUPP; 8382 goto out; 8383 } 8384 8385 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 8386 Dialects)) { 8387 ret = -EINVAL; 8388 goto out; 8389 } 8390 8391 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 8392 ret = -EINVAL; 8393 goto out; 8394 } 8395 8396 ret = fsctl_validate_negotiate_info(conn, 8397 (struct validate_negotiate_info_req *)buffer, 8398 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 8399 in_buf_len); 8400 if (ret < 0) 8401 goto out; 8402 8403 nbytes = sizeof(struct validate_negotiate_info_rsp); 8404 rsp->PersistentFileId = SMB2_NO_FID; 8405 rsp->VolatileFileId = SMB2_NO_FID; 8406 break; 8407 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 8408 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 8409 if (ret < 0) 8410 goto out; 8411 nbytes = ret; 8412 break; 8413 case FSCTL_REQUEST_RESUME_KEY: 8414 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 8415 ret = -EINVAL; 8416 goto out; 8417 } 8418 8419 ret = fsctl_request_resume_key(work, req, 8420 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 8421 if (ret < 0) 8422 goto out; 8423 rsp->PersistentFileId = req->PersistentFileId; 8424 rsp->VolatileFileId = req->VolatileFileId; 8425 nbytes = sizeof(struct resume_key_ioctl_rsp); 8426 break; 8427 case FSCTL_COPYCHUNK: 8428 case FSCTL_COPYCHUNK_WRITE: 8429 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8430 ksmbd_debug(SMB, 8431 "User does not have write permission\n"); 8432 ret = -EACCES; 8433 goto out; 8434 } 8435 8436 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) { 8437 ret = -EINVAL; 8438 goto out; 8439 } 8440 8441 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 8442 ret = -EINVAL; 8443 goto out; 8444 } 8445 8446 nbytes = sizeof(struct copychunk_ioctl_rsp); 8447 rsp->VolatileFileId = req->VolatileFileId; 8448 rsp->PersistentFileId = req->PersistentFileId; 8449 fsctl_copychunk(work, 8450 (struct copychunk_ioctl_req *)buffer, 8451 le32_to_cpu(req->CtlCode), 8452 le32_to_cpu(req->InputCount), 8453 req->VolatileFileId, 8454 req->PersistentFileId, 8455 rsp); 8456 break; 8457 case FSCTL_SET_SPARSE: 8458 if (in_buf_len < sizeof(struct file_sparse)) { 8459 ret = -EINVAL; 8460 goto out; 8461 } 8462 8463 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); 8464 if (ret < 0) 8465 goto out; 8466 break; 8467 case FSCTL_SET_ZERO_DATA: 8468 { 8469 struct file_zero_data_information *zero_data; 8470 struct ksmbd_file *fp; 8471 loff_t off, len, bfz; 8472 8473 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 8474 ksmbd_debug(SMB, 8475 "User does not have write permission\n"); 8476 ret = -EACCES; 8477 goto out; 8478 } 8479 8480 if (in_buf_len < sizeof(struct file_zero_data_information)) { 8481 ret = -EINVAL; 8482 goto out; 8483 } 8484 8485 zero_data = 8486 (struct file_zero_data_information *)buffer; 8487 8488 off = le64_to_cpu(zero_data->FileOffset); 8489 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 8490 if (off < 0 || bfz < 0 || off > bfz) { 8491 ret = -EINVAL; 8492 goto out; 8493 } 8494 8495 len = bfz - off; 8496 if (len) { 8497 fp = ksmbd_lookup_fd_fast(work, id); 8498 if (!fp) { 8499 ret = -ENOENT; 8500 goto out; 8501 } 8502 8503 ret = ksmbd_vfs_zero_data(work, fp, off, len); 8504 ksmbd_fd_put(work, fp); 8505 if (ret < 0) 8506 goto out; 8507 } 8508 break; 8509 } 8510 case FSCTL_QUERY_ALLOCATED_RANGES: 8511 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 8512 ret = -EINVAL; 8513 goto out; 8514 } 8515 8516 ret = fsctl_query_allocated_ranges(work, id, 8517 (struct file_allocated_range_buffer *)buffer, 8518 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 8519 out_buf_len / 8520 sizeof(struct file_allocated_range_buffer), &nbytes); 8521 if (ret == -E2BIG) { 8522 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 8523 } else if (ret < 0) { 8524 nbytes = 0; 8525 goto out; 8526 } 8527 8528 nbytes *= sizeof(struct file_allocated_range_buffer); 8529 break; 8530 case FSCTL_GET_REPARSE_POINT: 8531 { 8532 struct reparse_data_buffer *reparse_ptr; 8533 struct ksmbd_file *fp; 8534 8535 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 8536 fp = ksmbd_lookup_fd_fast(work, id); 8537 if (!fp) { 8538 pr_err("not found fp!!\n"); 8539 ret = -ENOENT; 8540 goto out; 8541 } 8542 8543 reparse_ptr->ReparseTag = 8544 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 8545 reparse_ptr->ReparseDataLength = 0; 8546 ksmbd_fd_put(work, fp); 8547 nbytes = sizeof(struct reparse_data_buffer); 8548 break; 8549 } 8550 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 8551 { 8552 struct ksmbd_file *fp_in, *fp_out = NULL; 8553 struct duplicate_extents_to_file *dup_ext; 8554 loff_t src_off, dst_off, length, cloned; 8555 8556 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 8557 ret = -EINVAL; 8558 goto out; 8559 } 8560 8561 dup_ext = (struct duplicate_extents_to_file *)buffer; 8562 8563 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 8564 dup_ext->PersistentFileHandle); 8565 if (!fp_in) { 8566 pr_err("not found file handle in duplicate extent to file\n"); 8567 ret = -ENOENT; 8568 goto out; 8569 } 8570 8571 fp_out = ksmbd_lookup_fd_fast(work, id); 8572 if (!fp_out) { 8573 pr_err("not found fp\n"); 8574 ret = -ENOENT; 8575 goto dup_ext_out; 8576 } 8577 8578 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 8579 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 8580 length = le64_to_cpu(dup_ext->ByteCount); 8581 /* 8582 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 8583 * should fall back to vfs_copy_file_range(). This could be 8584 * beneficial when re-exporting nfs/smb mount, but note that 8585 * this can result in partial copy that returns an error status. 8586 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 8587 * fall back to vfs_copy_file_range(), should be avoided when 8588 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 8589 */ 8590 cloned = vfs_clone_file_range(fp_in->filp, src_off, 8591 fp_out->filp, dst_off, length, 0); 8592 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 8593 ret = -EOPNOTSUPP; 8594 goto dup_ext_out; 8595 } else if (cloned != length) { 8596 cloned = vfs_copy_file_range(fp_in->filp, src_off, 8597 fp_out->filp, dst_off, 8598 length, 0); 8599 if (cloned != length) { 8600 if (cloned < 0) 8601 ret = cloned; 8602 else 8603 ret = -EINVAL; 8604 } 8605 } 8606 8607 dup_ext_out: 8608 ksmbd_fd_put(work, fp_in); 8609 ksmbd_fd_put(work, fp_out); 8610 if (ret < 0) 8611 goto out; 8612 break; 8613 } 8614 default: 8615 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 8616 cnt_code); 8617 ret = -EOPNOTSUPP; 8618 goto out; 8619 } 8620 8621 rsp->CtlCode = cpu_to_le32(cnt_code); 8622 rsp->InputCount = cpu_to_le32(0); 8623 rsp->InputOffset = cpu_to_le32(112); 8624 rsp->OutputOffset = cpu_to_le32(112); 8625 rsp->OutputCount = cpu_to_le32(nbytes); 8626 rsp->StructureSize = cpu_to_le16(49); 8627 rsp->Reserved = cpu_to_le16(0); 8628 rsp->Flags = cpu_to_le32(0); 8629 rsp->Reserved2 = cpu_to_le32(0); 8630 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 8631 if (!ret) 8632 return ret; 8633 8634 out: 8635 if (ret == -EACCES) 8636 rsp->hdr.Status = STATUS_ACCESS_DENIED; 8637 else if (ret == -ENOENT) 8638 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 8639 else if (ret == -EOPNOTSUPP) 8640 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 8641 else if (ret == -ENOSPC) 8642 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 8643 else if (ret < 0 || rsp->hdr.Status == 0) 8644 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8645 8646 out2: 8647 smb2_set_err_rsp(work); 8648 return ret; 8649 } 8650 8651 /** 8652 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 8653 * @work: smb work containing oplock break command buffer 8654 * 8655 * Return: 0 8656 */ 8657 static void smb20_oplock_break_ack(struct ksmbd_work *work) 8658 { 8659 struct smb2_oplock_break *req; 8660 struct smb2_oplock_break *rsp; 8661 struct ksmbd_file *fp; 8662 struct oplock_info *opinfo = NULL; 8663 __le32 err = 0; 8664 int ret = 0; 8665 u64 volatile_id, persistent_id; 8666 char req_oplevel = 0, rsp_oplevel = 0; 8667 unsigned int oplock_change_type; 8668 8669 WORK_BUFFERS(work, req, rsp); 8670 8671 volatile_id = req->VolatileFid; 8672 persistent_id = req->PersistentFid; 8673 req_oplevel = req->OplockLevel; 8674 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8675 volatile_id, persistent_id, req_oplevel); 8676 8677 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8678 if (!fp) { 8679 rsp->hdr.Status = STATUS_FILE_CLOSED; 8680 smb2_set_err_rsp(work); 8681 return; 8682 } 8683 8684 opinfo = opinfo_get(fp); 8685 if (!opinfo) { 8686 pr_err("unexpected null oplock_info\n"); 8687 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8688 smb2_set_err_rsp(work); 8689 ksmbd_fd_put(work, fp); 8690 return; 8691 } 8692 8693 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8694 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8695 goto err_out; 8696 } 8697 8698 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8699 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8700 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8701 goto err_out; 8702 } 8703 8704 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8705 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8706 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8707 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8708 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8709 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8710 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8711 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8712 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8713 oplock_change_type = OPLOCK_READ_TO_NONE; 8714 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8715 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8716 err = STATUS_INVALID_DEVICE_STATE; 8717 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8718 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8719 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8720 oplock_change_type = OPLOCK_WRITE_TO_READ; 8721 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8722 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8723 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8724 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8725 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8726 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8727 oplock_change_type = OPLOCK_READ_TO_NONE; 8728 } else { 8729 oplock_change_type = 0; 8730 } 8731 } else { 8732 oplock_change_type = 0; 8733 } 8734 8735 switch (oplock_change_type) { 8736 case OPLOCK_WRITE_TO_READ: 8737 ret = opinfo_write_to_read(opinfo); 8738 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8739 break; 8740 case OPLOCK_WRITE_TO_NONE: 8741 ret = opinfo_write_to_none(opinfo); 8742 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8743 break; 8744 case OPLOCK_READ_TO_NONE: 8745 ret = opinfo_read_to_none(opinfo); 8746 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8747 break; 8748 default: 8749 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8750 opinfo->level, rsp_oplevel); 8751 } 8752 8753 if (ret < 0) { 8754 rsp->hdr.Status = err; 8755 goto err_out; 8756 } 8757 8758 rsp->StructureSize = cpu_to_le16(24); 8759 rsp->OplockLevel = rsp_oplevel; 8760 rsp->Reserved = 0; 8761 rsp->Reserved2 = 0; 8762 rsp->VolatileFid = volatile_id; 8763 rsp->PersistentFid = persistent_id; 8764 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8765 if (ret) { 8766 err_out: 8767 smb2_set_err_rsp(work); 8768 } 8769 8770 opinfo->op_state = OPLOCK_STATE_NONE; 8771 wake_up_interruptible_all(&opinfo->oplock_q); 8772 opinfo_put(opinfo); 8773 ksmbd_fd_put(work, fp); 8774 } 8775 8776 static int check_lease_state(struct lease *lease, __le32 req_state) 8777 { 8778 if ((lease->new_state == 8779 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8780 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8781 lease->new_state = req_state; 8782 return 0; 8783 } 8784 8785 if (lease->new_state == req_state) 8786 return 0; 8787 8788 return 1; 8789 } 8790 8791 /** 8792 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8793 * @work: smb work containing lease break command buffer 8794 * 8795 * Return: 0 8796 */ 8797 static void smb21_lease_break_ack(struct ksmbd_work *work) 8798 { 8799 struct ksmbd_conn *conn = work->conn; 8800 struct smb2_lease_ack *req; 8801 struct smb2_lease_ack *rsp; 8802 struct oplock_info *opinfo; 8803 __le32 err = 0; 8804 int ret = 0; 8805 unsigned int lease_change_type; 8806 __le32 lease_state; 8807 struct lease *lease; 8808 8809 WORK_BUFFERS(work, req, rsp); 8810 8811 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8812 le32_to_cpu(req->LeaseState)); 8813 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8814 if (!opinfo) { 8815 ksmbd_debug(OPLOCK, "file not opened\n"); 8816 smb2_set_err_rsp(work); 8817 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8818 return; 8819 } 8820 lease = opinfo->o_lease; 8821 8822 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8823 pr_err("unexpected lease break state 0x%x\n", 8824 opinfo->op_state); 8825 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8826 goto err_out; 8827 } 8828 8829 if (check_lease_state(lease, req->LeaseState)) { 8830 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8831 ksmbd_debug(OPLOCK, 8832 "req lease state: 0x%x, expected state: 0x%x\n", 8833 req->LeaseState, lease->new_state); 8834 goto err_out; 8835 } 8836 8837 if (!atomic_read(&opinfo->breaking_cnt)) { 8838 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8839 goto err_out; 8840 } 8841 8842 /* check for bad lease state */ 8843 if (req->LeaseState & 8844 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8845 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8846 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8847 lease_change_type = OPLOCK_WRITE_TO_NONE; 8848 else 8849 lease_change_type = OPLOCK_READ_TO_NONE; 8850 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8851 le32_to_cpu(lease->state), 8852 le32_to_cpu(req->LeaseState)); 8853 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8854 req->LeaseState != SMB2_LEASE_NONE_LE) { 8855 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8856 lease_change_type = OPLOCK_READ_TO_NONE; 8857 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8858 le32_to_cpu(lease->state), 8859 le32_to_cpu(req->LeaseState)); 8860 } else { 8861 /* valid lease state changes */ 8862 err = STATUS_INVALID_DEVICE_STATE; 8863 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8864 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8865 lease_change_type = OPLOCK_WRITE_TO_NONE; 8866 else 8867 lease_change_type = OPLOCK_READ_TO_NONE; 8868 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8869 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8870 lease_change_type = OPLOCK_WRITE_TO_READ; 8871 else 8872 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8873 } else { 8874 lease_change_type = 0; 8875 } 8876 } 8877 8878 switch (lease_change_type) { 8879 case OPLOCK_WRITE_TO_READ: 8880 ret = opinfo_write_to_read(opinfo); 8881 break; 8882 case OPLOCK_READ_HANDLE_TO_READ: 8883 ret = opinfo_read_handle_to_read(opinfo); 8884 break; 8885 case OPLOCK_WRITE_TO_NONE: 8886 ret = opinfo_write_to_none(opinfo); 8887 break; 8888 case OPLOCK_READ_TO_NONE: 8889 ret = opinfo_read_to_none(opinfo); 8890 break; 8891 default: 8892 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8893 le32_to_cpu(lease->state), 8894 le32_to_cpu(req->LeaseState)); 8895 } 8896 8897 if (ret < 0) { 8898 rsp->hdr.Status = err; 8899 goto err_out; 8900 } 8901 8902 lease_state = lease->state; 8903 8904 rsp->StructureSize = cpu_to_le16(36); 8905 rsp->Reserved = 0; 8906 rsp->Flags = 0; 8907 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8908 rsp->LeaseState = lease_state; 8909 rsp->LeaseDuration = 0; 8910 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8911 if (ret) { 8912 err_out: 8913 smb2_set_err_rsp(work); 8914 } 8915 8916 opinfo->op_state = OPLOCK_STATE_NONE; 8917 wake_up_interruptible_all(&opinfo->oplock_q); 8918 atomic_dec(&opinfo->breaking_cnt); 8919 wake_up_interruptible_all(&opinfo->oplock_brk); 8920 opinfo_put(opinfo); 8921 } 8922 8923 /** 8924 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8925 * @work: smb work containing oplock/lease break command buffer 8926 * 8927 * Return: 0 on success, otherwise error 8928 */ 8929 int smb2_oplock_break(struct ksmbd_work *work) 8930 { 8931 struct smb2_oplock_break *req; 8932 struct smb2_oplock_break *rsp; 8933 8934 ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n"); 8935 8936 WORK_BUFFERS(work, req, rsp); 8937 8938 switch (le16_to_cpu(req->StructureSize)) { 8939 case OP_BREAK_STRUCT_SIZE_20: 8940 smb20_oplock_break_ack(work); 8941 break; 8942 case OP_BREAK_STRUCT_SIZE_21: 8943 smb21_lease_break_ack(work); 8944 break; 8945 default: 8946 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8947 le16_to_cpu(req->StructureSize)); 8948 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8949 smb2_set_err_rsp(work); 8950 return -EINVAL; 8951 } 8952 8953 return 0; 8954 } 8955 8956 /** 8957 * smb2_notify() - handler for smb2 notify request 8958 * @work: smb work containing notify command buffer 8959 * 8960 * Return: 0 on success, otherwise error 8961 */ 8962 int smb2_notify(struct ksmbd_work *work) 8963 { 8964 struct smb2_change_notify_req *req; 8965 struct smb2_change_notify_rsp *rsp; 8966 8967 ksmbd_debug(SMB, "Received smb2 notify\n"); 8968 8969 WORK_BUFFERS(work, req, rsp); 8970 8971 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8972 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8973 smb2_set_err_rsp(work); 8974 return -EIO; 8975 } 8976 8977 smb2_set_err_rsp(work); 8978 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8979 return -EOPNOTSUPP; 8980 } 8981 8982 /** 8983 * smb2_is_sign_req() - handler for checking packet signing status 8984 * @work: smb work containing notify command buffer 8985 * @command: SMB2 command id 8986 * 8987 * Return: true if packed is signed, false otherwise 8988 */ 8989 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8990 { 8991 struct smb2_hdr *rcv_hdr2 = smb_get_msg(work->request_buf); 8992 8993 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8994 command != SMB2_NEGOTIATE_HE && 8995 command != SMB2_SESSION_SETUP_HE && 8996 command != SMB2_OPLOCK_BREAK_HE) 8997 return true; 8998 8999 return false; 9000 } 9001 9002 /** 9003 * smb2_check_sign_req() - handler for req packet sign processing 9004 * @work: smb work containing notify command buffer 9005 * 9006 * Return: 1 on success, 0 otherwise 9007 */ 9008 int smb2_check_sign_req(struct ksmbd_work *work) 9009 { 9010 struct smb2_hdr *hdr; 9011 char signature_req[SMB2_SIGNATURE_SIZE]; 9012 char signature[SMB2_HMACSHA256_SIZE]; 9013 struct kvec iov[1]; 9014 size_t len; 9015 9016 hdr = smb_get_msg(work->request_buf); 9017 if (work->next_smb2_rcv_hdr_off) 9018 hdr = ksmbd_req_buf_next(work); 9019 9020 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 9021 len = get_rfc1002_len(work->request_buf); 9022 else if (hdr->NextCommand) 9023 len = le32_to_cpu(hdr->NextCommand); 9024 else 9025 len = get_rfc1002_len(work->request_buf) - 9026 work->next_smb2_rcv_hdr_off; 9027 9028 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 9029 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9030 9031 iov[0].iov_base = (char *)&hdr->ProtocolId; 9032 iov[0].iov_len = len; 9033 9034 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 9035 signature); 9036 9037 if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 9038 pr_err("bad smb2 signature\n"); 9039 return 0; 9040 } 9041 9042 return 1; 9043 } 9044 9045 /** 9046 * smb2_set_sign_rsp() - handler for rsp packet sign processing 9047 * @work: smb work containing notify command buffer 9048 * 9049 */ 9050 void smb2_set_sign_rsp(struct ksmbd_work *work) 9051 { 9052 struct smb2_hdr *hdr; 9053 char signature[SMB2_HMACSHA256_SIZE]; 9054 struct kvec *iov; 9055 int n_vec = 1; 9056 9057 hdr = ksmbd_resp_buf_curr(work); 9058 hdr->Flags |= SMB2_FLAGS_SIGNED; 9059 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9060 9061 if (hdr->Command == SMB2_READ) { 9062 iov = &work->iov[work->iov_idx - 1]; 9063 n_vec++; 9064 } else { 9065 iov = &work->iov[work->iov_idx]; 9066 } 9067 9068 ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 9069 signature); 9070 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9071 } 9072 9073 /** 9074 * smb3_check_sign_req() - handler for req packet sign processing 9075 * @work: smb work containing notify command buffer 9076 * 9077 * Return: 1 on success, 0 otherwise 9078 */ 9079 int smb3_check_sign_req(struct ksmbd_work *work) 9080 { 9081 struct ksmbd_conn *conn = work->conn; 9082 char *signing_key; 9083 struct smb2_hdr *hdr; 9084 struct channel *chann; 9085 char signature_req[SMB2_SIGNATURE_SIZE]; 9086 char signature[SMB2_CMACAES_SIZE]; 9087 struct kvec iov[1]; 9088 size_t len; 9089 9090 hdr = smb_get_msg(work->request_buf); 9091 if (work->next_smb2_rcv_hdr_off) 9092 hdr = ksmbd_req_buf_next(work); 9093 9094 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 9095 len = get_rfc1002_len(work->request_buf); 9096 else if (hdr->NextCommand) 9097 len = le32_to_cpu(hdr->NextCommand); 9098 else 9099 len = get_rfc1002_len(work->request_buf) - 9100 work->next_smb2_rcv_hdr_off; 9101 9102 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 9103 signing_key = work->sess->smb3signingkey; 9104 } else { 9105 chann = lookup_chann_list(work->sess, conn); 9106 if (!chann) { 9107 return 0; 9108 } 9109 signing_key = chann->smb3signingkey; 9110 } 9111 9112 if (!signing_key) { 9113 pr_err("SMB3 signing key is not generated\n"); 9114 return 0; 9115 } 9116 9117 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 9118 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9119 iov[0].iov_base = (char *)&hdr->ProtocolId; 9120 iov[0].iov_len = len; 9121 9122 ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature); 9123 9124 if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 9125 pr_err("bad smb2 signature\n"); 9126 return 0; 9127 } 9128 9129 return 1; 9130 } 9131 9132 /** 9133 * smb3_set_sign_rsp() - handler for rsp packet sign processing 9134 * @work: smb work containing notify command buffer 9135 * 9136 */ 9137 void smb3_set_sign_rsp(struct ksmbd_work *work) 9138 { 9139 struct ksmbd_conn *conn = work->conn; 9140 struct smb2_hdr *hdr; 9141 struct channel *chann; 9142 char signature[SMB2_CMACAES_SIZE]; 9143 struct kvec *iov; 9144 int n_vec = 1; 9145 char *signing_key; 9146 9147 hdr = ksmbd_resp_buf_curr(work); 9148 9149 if (conn->binding == false && 9150 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 9151 signing_key = work->sess->smb3signingkey; 9152 } else { 9153 chann = lookup_chann_list(work->sess, work->conn); 9154 if (!chann) { 9155 return; 9156 } 9157 signing_key = chann->smb3signingkey; 9158 } 9159 9160 if (!signing_key) 9161 return; 9162 9163 hdr->Flags |= SMB2_FLAGS_SIGNED; 9164 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 9165 9166 if (hdr->Command == SMB2_READ) { 9167 iov = &work->iov[work->iov_idx - 1]; 9168 n_vec++; 9169 } else { 9170 iov = &work->iov[work->iov_idx]; 9171 } 9172 9173 ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature); 9174 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 9175 } 9176 9177 /** 9178 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 9179 * @work: smb work containing response buffer 9180 * 9181 */ 9182 void smb3_preauth_hash_rsp(struct ksmbd_work *work) 9183 { 9184 struct ksmbd_conn *conn = work->conn; 9185 struct ksmbd_session *sess = work->sess; 9186 struct smb2_hdr *req, *rsp; 9187 9188 if (conn->dialect != SMB311_PROT_ID) 9189 return; 9190 9191 WORK_BUFFERS(work, req, rsp); 9192 9193 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 9194 conn->preauth_info) 9195 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9196 conn->preauth_info->Preauth_HashValue); 9197 9198 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 9199 __u8 *hash_value; 9200 9201 if (conn->binding) { 9202 struct preauth_session *preauth_sess; 9203 9204 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 9205 if (!preauth_sess) 9206 return; 9207 hash_value = preauth_sess->Preauth_HashValue; 9208 } else { 9209 hash_value = sess->Preauth_HashValue; 9210 if (!hash_value) 9211 return; 9212 } 9213 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 9214 hash_value); 9215 } 9216 } 9217 9218 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 9219 { 9220 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 9221 struct smb2_hdr *hdr = smb_get_msg(old_buf); 9222 unsigned int orig_len = get_rfc1002_len(old_buf); 9223 9224 /* tr_buf must be cleared by the caller */ 9225 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 9226 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 9227 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 9228 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 9229 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 9230 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 9231 else 9232 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 9233 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 9234 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 9235 inc_rfc1001_len(tr_buf, orig_len); 9236 } 9237 9238 int smb3_encrypt_resp(struct ksmbd_work *work) 9239 { 9240 struct kvec *iov = work->iov; 9241 int rc = -ENOMEM; 9242 void *tr_buf; 9243 9244 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP); 9245 if (!tr_buf) 9246 return rc; 9247 9248 /* fill transform header */ 9249 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 9250 9251 iov[0].iov_base = tr_buf; 9252 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9253 work->tr_buf = tr_buf; 9254 9255 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 9256 } 9257 9258 bool smb3_is_transform_hdr(void *buf) 9259 { 9260 struct smb2_transform_hdr *trhdr = smb_get_msg(buf); 9261 9262 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 9263 } 9264 9265 int smb3_decrypt_req(struct ksmbd_work *work) 9266 { 9267 struct ksmbd_session *sess; 9268 char *buf = work->request_buf; 9269 unsigned int pdu_length = get_rfc1002_len(buf); 9270 struct kvec iov[2]; 9271 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 9272 struct smb2_transform_hdr *tr_hdr = smb_get_msg(buf); 9273 int rc = 0; 9274 9275 if (pdu_length < sizeof(struct smb2_transform_hdr) || 9276 buf_data_size < sizeof(struct smb2_hdr)) { 9277 pr_err("Transform message is too small (%u)\n", 9278 pdu_length); 9279 return -ECONNABORTED; 9280 } 9281 9282 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 9283 pr_err("Transform message is broken\n"); 9284 return -ECONNABORTED; 9285 } 9286 9287 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 9288 if (!sess) { 9289 pr_err("invalid session id(%llx) in transform header\n", 9290 le64_to_cpu(tr_hdr->SessionId)); 9291 return -ECONNABORTED; 9292 } 9293 ksmbd_user_session_put(sess); 9294 9295 iov[0].iov_base = buf; 9296 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 9297 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 9298 iov[1].iov_len = buf_data_size; 9299 rc = ksmbd_crypt_message(work, iov, 2, 0); 9300 if (rc) 9301 return rc; 9302 9303 memmove(buf + 4, iov[1].iov_base, buf_data_size); 9304 *(__be32 *)buf = cpu_to_be32(buf_data_size); 9305 9306 return rc; 9307 } 9308 9309 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 9310 { 9311 struct ksmbd_conn *conn = work->conn; 9312 struct ksmbd_session *sess = work->sess; 9313 struct smb2_hdr *rsp = smb_get_msg(work->response_buf); 9314 9315 if (conn->dialect < SMB30_PROT_ID) 9316 return false; 9317 9318 if (work->next_smb2_rcv_hdr_off) 9319 rsp = ksmbd_resp_buf_next(work); 9320 9321 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 9322 sess->user && !user_guest(sess->user) && 9323 rsp->Status == STATUS_SUCCESS) 9324 return true; 9325 return false; 9326 } 9327