1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2000,2005 5 * 6 * Modified by Steve French (sfrench@us.ibm.com) 7 */ 8 #include <linux/fs.h> 9 #include <linux/string.h> 10 #include <linux/ctype.h> 11 #include <linux/kstrtox.h> 12 #include <linux/module.h> 13 #include <linux/proc_fs.h> 14 #include <linux/uaccess.h> 15 #include <uapi/linux/ethtool.h> 16 #include "cifsglob.h" 17 #include "cifsproto.h" 18 #include "cifs_debug.h" 19 #include "cifsfs.h" 20 #include "fs_context.h" 21 #ifdef CONFIG_CIFS_DFS_UPCALL 22 #include "dfs_cache.h" 23 #endif 24 #ifdef CONFIG_CIFS_SMB_DIRECT 25 #include "smbdirect.h" 26 #include "../common/smbdirect/smbdirect_pdu.h" 27 #endif 28 #include "cifs_swn.h" 29 #include "cached_dir.h" 30 31 void 32 cifs_dump_mem(char *label, void *data, int length) 33 { 34 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data); 35 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4, 36 data, length, true); 37 } 38 39 void cifs_dump_mids(struct TCP_Server_Info *server) 40 { 41 #ifdef CONFIG_CIFS_DEBUG2 42 struct mid_q_entry *mid_entry; 43 44 if (server == NULL) 45 return; 46 47 cifs_dbg(VFS, "Dump pending requests:\n"); 48 spin_lock(&server->mid_queue_lock); 49 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { 50 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n", 51 mid_entry->mid_state, 52 le16_to_cpu(mid_entry->command), 53 mid_entry->pid, 54 mid_entry->callback_data, 55 mid_entry->mid); 56 #ifdef CONFIG_CIFS_STATS2 57 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n", 58 mid_entry->large_buf, 59 mid_entry->resp_buf, 60 mid_entry->when_received, 61 jiffies); 62 #endif /* STATS2 */ 63 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n", 64 mid_entry->multiRsp, mid_entry->multiEnd); 65 if (mid_entry->resp_buf) { 66 server->ops->dump_detail(mid_entry->resp_buf, 67 mid_entry->response_pdu_len, server); 68 cifs_dump_mem("existing buf: ", mid_entry->resp_buf, 62); 69 } 70 } 71 spin_unlock(&server->mid_queue_lock); 72 #endif /* CONFIG_CIFS_DEBUG2 */ 73 } 74 75 #ifdef CONFIG_PROC_FS 76 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon) 77 { 78 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); 79 80 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count); 81 if (tcon->nativeFileSystem) 82 seq_printf(m, "Type: %s ", tcon->nativeFileSystem); 83 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d", 84 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), 85 le32_to_cpu(tcon->fsAttrInfo.Attributes), 86 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), 87 tcon->status); 88 if (dev_type == FILE_DEVICE_DISK) 89 seq_puts(m, " type: DISK "); 90 else if (dev_type == FILE_DEVICE_CD_ROM) 91 seq_puts(m, " type: CDROM "); 92 else 93 seq_printf(m, " type: %d ", dev_type); 94 95 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number); 96 97 if ((tcon->seal) || 98 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || 99 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) 100 seq_puts(m, " encrypted"); 101 if (tcon->nocase) 102 seq_printf(m, " nocase"); 103 if (tcon->unix_ext) 104 seq_printf(m, " POSIX Extensions"); 105 if (tcon->ses->server->ops->dump_share_caps) 106 tcon->ses->server->ops->dump_share_caps(m, tcon); 107 if (tcon->use_witness) 108 seq_puts(m, " Witness"); 109 if (tcon->broken_sparse_sup) 110 seq_puts(m, " nosparse"); 111 if (tcon->need_reconnect) 112 seq_puts(m, "\tDISCONNECTED "); 113 spin_lock(&tcon->tc_lock); 114 if (tcon->origin_fullpath) { 115 seq_printf(m, "\n\tDFS origin fullpath: %s", 116 tcon->origin_fullpath); 117 } 118 spin_unlock(&tcon->tc_lock); 119 seq_putc(m, '\n'); 120 } 121 122 static void 123 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) 124 { 125 struct TCP_Server_Info *server = chan->server; 126 127 if (!server) { 128 seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1); 129 return; 130 } 131 132 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx" 133 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x" 134 "\n\t\tTCP status: %d Instance: %d" 135 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d" 136 "\n\t\tIn Send: %d In MaxReq Wait: %d", 137 i+1, server->conn_id, 138 server->credits, 139 server->echo_credits, 140 server->oplock_credits, 141 server->dialect, 142 server->tcpStatus, 143 server->reconnect_instance, 144 server->srv_count, 145 server->sec_mode, 146 in_flight(server), 147 atomic_read(&server->in_send), 148 atomic_read(&server->num_waiters)); 149 #ifdef CONFIG_NET_NS 150 if (server->net) 151 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 152 #endif /* NET_NS */ 153 154 } 155 156 static inline const char *smb_speed_to_str(size_t bps) 157 { 158 size_t mbps = bps / 1000 / 1000; 159 160 switch (mbps) { 161 case SPEED_10: 162 return "10Mbps"; 163 case SPEED_100: 164 return "100Mbps"; 165 case SPEED_1000: 166 return "1Gbps"; 167 case SPEED_2500: 168 return "2.5Gbps"; 169 case SPEED_5000: 170 return "5Gbps"; 171 case SPEED_10000: 172 return "10Gbps"; 173 case SPEED_14000: 174 return "14Gbps"; 175 case SPEED_20000: 176 return "20Gbps"; 177 case SPEED_25000: 178 return "25Gbps"; 179 case SPEED_40000: 180 return "40Gbps"; 181 case SPEED_50000: 182 return "50Gbps"; 183 case SPEED_56000: 184 return "56Gbps"; 185 case SPEED_100000: 186 return "100Gbps"; 187 case SPEED_200000: 188 return "200Gbps"; 189 case SPEED_400000: 190 return "400Gbps"; 191 case SPEED_800000: 192 return "800Gbps"; 193 default: 194 return "Unknown"; 195 } 196 } 197 198 static void 199 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface) 200 { 201 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; 202 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; 203 204 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed)); 205 seq_puts(m, "\t\tCapabilities: "); 206 if (iface->rdma_capable) 207 seq_puts(m, "rdma "); 208 if (iface->rss_capable) 209 seq_puts(m, "rss "); 210 if (!iface->rdma_capable && !iface->rss_capable) 211 seq_puts(m, "None"); 212 seq_putc(m, '\n'); 213 if (iface->sockaddr.ss_family == AF_INET) 214 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr); 215 else if (iface->sockaddr.ss_family == AF_INET6) 216 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr); 217 if (!iface->is_active) 218 seq_puts(m, "\t\t[for-cleanup]\n"); 219 } 220 221 static int cifs_debug_files_proc_show(struct seq_file *m, void *v) 222 { 223 struct TCP_Server_Info *server; 224 struct cifs_ses *ses; 225 struct cifs_tcon *tcon; 226 struct cifsFileInfo *cfile; 227 struct inode *inode; 228 struct cifsInodeInfo *cinode; 229 char lease[4]; 230 int n; 231 232 seq_puts(m, "# Version:1\n"); 233 seq_puts(m, "# Format:\n"); 234 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>"); 235 #ifdef CONFIG_CIFS_DEBUG2 236 seq_puts(m, " <filename> <lease> <lease-key> <mid>\n"); 237 #else 238 seq_puts(m, " <filename> <lease> <lease-key>\n"); 239 #endif /* CIFS_DEBUG2 */ 240 spin_lock(&cifs_tcp_ses_lock); 241 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 242 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 243 if (cifs_ses_exiting(ses)) 244 continue; 245 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 246 spin_lock(&tcon->open_file_lock); 247 list_for_each_entry(cfile, &tcon->openFileList, tlist) { 248 seq_printf(m, 249 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd", 250 tcon->tid, 251 ses->Suid, 252 cfile->fid.persistent_fid, 253 cfile->f_flags, 254 cfile->count, 255 cfile->pid, 256 from_kuid(&init_user_ns, cfile->uid), 257 cfile->dentry); 258 259 /* Append lease/oplock caching state as RHW letters */ 260 inode = d_inode(cfile->dentry); 261 cinode = NULL; 262 n = 0; 263 if (inode) { 264 cinode = CIFS_I(inode); 265 if (CIFS_CACHE_READ(cinode)) 266 lease[n++] = 'R'; 267 if (CIFS_CACHE_HANDLE(cinode)) 268 lease[n++] = 'H'; 269 if (CIFS_CACHE_WRITE(cinode)) 270 lease[n++] = 'W'; 271 } 272 lease[n] = '\0'; 273 seq_puts(m, " "); 274 if (n) 275 seq_printf(m, "%s", lease); 276 else 277 seq_puts(m, "NONE"); 278 279 seq_puts(m, " "); 280 if (cinode && cinode->lease_granted) 281 seq_printf(m, "%pUl", cinode->lease_key); 282 else 283 seq_puts(m, "-"); 284 285 #ifdef CONFIG_CIFS_DEBUG2 286 seq_printf(m, " %llu", cfile->fid.mid); 287 #endif /* CONFIG_CIFS_DEBUG2 */ 288 seq_printf(m, "\n"); 289 } 290 spin_unlock(&tcon->open_file_lock); 291 } 292 } 293 } 294 spin_unlock(&cifs_tcp_ses_lock); 295 seq_putc(m, '\n'); 296 return 0; 297 } 298 299 static int cifs_debug_dirs_proc_show(struct seq_file *m, void *v) 300 { 301 struct list_head *stmp, *tmp, *tmp1; 302 struct TCP_Server_Info *server; 303 struct cifs_ses *ses; 304 struct cifs_tcon *tcon; 305 struct cached_fids *cfids; 306 struct cached_fid *cfid; 307 LIST_HEAD(entry); 308 309 seq_puts(m, "# Version:1\n"); 310 seq_puts(m, "# Format:\n"); 311 seq_puts(m, "# <tree id> <sess id> <persistent fid> <lease-key> <path>\n"); 312 313 spin_lock(&cifs_tcp_ses_lock); 314 list_for_each(stmp, &cifs_tcp_ses_list) { 315 server = list_entry(stmp, struct TCP_Server_Info, 316 tcp_ses_list); 317 list_for_each(tmp, &server->smb_ses_list) { 318 ses = list_entry(tmp, struct cifs_ses, smb_ses_list); 319 list_for_each(tmp1, &ses->tcon_list) { 320 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list); 321 cfids = tcon->cfids; 322 if (!cfids) 323 continue; 324 spin_lock(&cfids->cfid_list_lock); /* check lock ordering */ 325 seq_printf(m, "Num entries: %d, cached_dirents: %lu entries, %llu bytes\n", 326 cfids->num_entries, 327 (unsigned long)atomic_long_read(&cfids->total_dirents_entries), 328 (unsigned long long)atomic64_read(&cfids->total_dirents_bytes)); 329 list_for_each_entry(cfid, &cfids->entries, entry) { 330 seq_printf(m, "0x%x 0x%llx 0x%llx ", 331 tcon->tid, 332 ses->Suid, 333 cfid->fid.persistent_fid); 334 if (cfid->has_lease) 335 seq_printf(m, "%pUl ", cfid->fid.lease_key); 336 else 337 seq_puts(m, "- "); 338 seq_printf(m, "%s", cfid->path); 339 if (cfid->file_all_info_is_valid) 340 seq_printf(m, "\tvalid file info"); 341 if (cfid->dirents.is_valid) 342 seq_printf(m, ", valid dirents"); 343 if (!list_empty(&cfid->dirents.entries)) 344 seq_printf(m, ", dirents: %lu entries, %lu bytes", 345 cfid->dirents.entries_count, cfid->dirents.bytes_used); 346 seq_printf(m, "\n"); 347 } 348 spin_unlock(&cfids->cfid_list_lock); 349 } 350 } 351 } 352 spin_unlock(&cifs_tcp_ses_lock); 353 seq_putc(m, '\n'); 354 return 0; 355 } 356 357 static __always_inline const char *compression_alg_str(__le16 alg) 358 { 359 switch (alg) { 360 case SMB3_COMPRESS_NONE: 361 return "NONE"; 362 case SMB3_COMPRESS_LZNT1: 363 return "LZNT1"; 364 case SMB3_COMPRESS_LZ77: 365 return "LZ77"; 366 case SMB3_COMPRESS_LZ77_HUFF: 367 return "LZ77-Huffman"; 368 case SMB3_COMPRESS_PATTERN: 369 return "Pattern_V1"; 370 default: 371 return "invalid"; 372 } 373 } 374 375 static __always_inline const char *cipher_alg_str(__le16 cipher) 376 { 377 switch (cipher) { 378 case SMB2_ENCRYPTION_AES128_CCM: 379 return "AES128-CCM"; 380 case SMB2_ENCRYPTION_AES128_GCM: 381 return "AES128-GCM"; 382 case SMB2_ENCRYPTION_AES256_CCM: 383 return "AES256-CCM"; 384 case SMB2_ENCRYPTION_AES256_GCM: 385 return "AES256-GCM"; 386 default: 387 return "UNKNOWN"; 388 } 389 } 390 391 static int cifs_debug_data_proc_show(struct seq_file *m, void *v) 392 { 393 struct mid_q_entry *mid_entry; 394 struct TCP_Server_Info *server; 395 struct TCP_Server_Info *chan_server; 396 struct cifs_ses *ses; 397 struct cifs_tcon *tcon; 398 struct cifs_server_iface *iface; 399 size_t iface_weight = 0, iface_min_speed = 0; 400 struct cifs_server_iface *last_iface = NULL; 401 int c, i, j; 402 403 seq_puts(m, 404 "Display Internal CIFS Data Structures for Debugging\n" 405 "---------------------------------------------------\n"); 406 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); 407 seq_printf(m, "Features:"); 408 #ifdef CONFIG_CIFS_DFS_UPCALL 409 seq_printf(m, " DFS"); 410 #endif 411 #ifdef CONFIG_CIFS_FSCACHE 412 seq_printf(m, ",FSCACHE"); 413 #endif 414 #ifdef CONFIG_CIFS_SMB_DIRECT 415 seq_printf(m, ",SMB_DIRECT"); 416 #endif 417 #ifdef CONFIG_CIFS_STATS2 418 seq_printf(m, ",STATS2"); 419 #else 420 seq_printf(m, ",STATS"); 421 #endif 422 #ifdef CONFIG_CIFS_DEBUG2 423 seq_printf(m, ",DEBUG2"); 424 #elif defined(CONFIG_CIFS_DEBUG) 425 seq_printf(m, ",DEBUG"); 426 #endif 427 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 428 seq_printf(m, ",ALLOW_INSECURE_LEGACY"); 429 #endif 430 #ifdef CONFIG_CIFS_POSIX 431 seq_printf(m, ",CIFS_POSIX"); 432 #endif 433 #ifdef CONFIG_CIFS_UPCALL 434 seq_printf(m, ",UPCALL(SPNEGO)"); 435 #endif 436 #ifdef CONFIG_CIFS_XATTR 437 seq_printf(m, ",XATTR"); 438 #endif 439 seq_printf(m, ",ACL"); 440 #ifdef CONFIG_CIFS_SWN_UPCALL 441 seq_puts(m, ",WITNESS"); 442 #endif 443 #ifdef CONFIG_CIFS_COMPRESSION 444 seq_puts(m, ",COMPRESSION"); 445 #endif 446 seq_putc(m, '\n'); 447 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize); 448 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); 449 450 seq_printf(m, "\nServers: "); 451 452 c = 0; 453 spin_lock(&cifs_tcp_ses_lock); 454 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 455 #ifdef CONFIG_CIFS_SMB_DIRECT 456 struct smbdirect_socket *sc; 457 struct smbdirect_socket_parameters *sp; 458 #endif 459 460 /* channel info will be printed as a part of sessions below */ 461 if (SERVER_IS_CHAN(server)) 462 continue; 463 464 c++; 465 seq_printf(m, "\n%d) ConnectionId: 0x%llx ", 466 c, server->conn_id); 467 468 spin_lock(&server->srv_lock); 469 if (server->hostname) 470 seq_printf(m, "Hostname: %s ", server->hostname); 471 seq_printf(m, "\nClientGUID: %pUL", server->client_guid); 472 spin_unlock(&server->srv_lock); 473 #ifdef CONFIG_CIFS_SMB_DIRECT 474 if (!server->rdma) 475 goto skip_rdma; 476 477 if (!server->smbd_conn) { 478 seq_printf(m, "\nSMBDirect transport not available"); 479 goto skip_rdma; 480 } 481 sc = &server->smbd_conn->socket; 482 sp = &sc->parameters; 483 484 seq_printf(m, "\nSMBDirect protocol version: 0x%x " 485 "transport status: %s (%u)", 486 SMBDIRECT_V1, 487 smbdirect_socket_status_string(sc->status), 488 sc->status); 489 seq_printf(m, "\nConn receive_credit_max: %u " 490 "send_credit_target: %u max_send_size: %u", 491 sp->recv_credit_max, 492 sp->send_credit_target, 493 sp->max_send_size); 494 seq_printf(m, "\nConn max_fragmented_recv_size: %u " 495 "max_fragmented_send_size: %u max_receive_size:%u", 496 sp->max_fragmented_recv_size, 497 sp->max_fragmented_send_size, 498 sp->max_recv_size); 499 seq_printf(m, "\nConn keep_alive_interval: %u " 500 "max_readwrite_size: %u rdma_readwrite_threshold: %u", 501 sp->keepalive_interval_msec * 1000, 502 sp->max_read_write_size, 503 server->rdma_readwrite_threshold); 504 seq_printf(m, "\nDebug count_get_receive_buffer: %llu " 505 "count_put_receive_buffer: %llu count_send_empty: %llu", 506 sc->statistics.get_receive_buffer, 507 sc->statistics.put_receive_buffer, 508 sc->statistics.send_empty); 509 seq_printf(m, "\nRead Queue " 510 "count_enqueue_reassembly_queue: %llu " 511 "count_dequeue_reassembly_queue: %llu " 512 "reassembly_data_length: %u " 513 "reassembly_queue_length: %u", 514 sc->statistics.enqueue_reassembly_queue, 515 sc->statistics.dequeue_reassembly_queue, 516 sc->recv_io.reassembly.data_length, 517 sc->recv_io.reassembly.queue_length); 518 seq_printf(m, "\nCurrent Credits send_credits: %u " 519 "receive_credits: %u receive_credit_target: %u", 520 atomic_read(&sc->send_io.credits.count), 521 atomic_read(&sc->recv_io.credits.count), 522 sc->recv_io.credits.target); 523 seq_printf(m, "\nPending send_pending: %u ", 524 atomic_read(&sc->send_io.pending.count)); 525 seq_printf(m, "\nMR responder_resources: %u " 526 "max_frmr_depth: %u mr_type: 0x%x", 527 sp->responder_resources, 528 sp->max_frmr_depth, 529 sc->mr_io.type); 530 seq_printf(m, "\nMR mr_ready_count: %u mr_used_count: %u", 531 atomic_read(&sc->mr_io.ready.count), 532 atomic_read(&sc->mr_io.used.count)); 533 skip_rdma: 534 #endif 535 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x", 536 server->credits, 537 server->echo_credits, 538 server->oplock_credits, 539 server->dialect); 540 if (server->sign) 541 seq_printf(m, " signed"); 542 if (server->posix_ext_supported) 543 seq_printf(m, " posix"); 544 if (server->nosharesock) 545 seq_printf(m, " nosharesock"); 546 547 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities); 548 549 if (server->rdma) 550 seq_printf(m, "\nRDMA "); 551 seq_printf(m, "\nTCP status: %d Instance: %d" 552 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d", 553 server->tcpStatus, 554 server->reconnect_instance, 555 server->srv_count, 556 server->sec_mode, in_flight(server)); 557 #ifdef CONFIG_NET_NS 558 if (server->net) 559 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 560 #endif /* NET_NS */ 561 562 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d", 563 atomic_read(&server->in_send), 564 atomic_read(&server->num_waiters)); 565 566 if (server->leaf_fullpath) { 567 seq_printf(m, "\nDFS leaf full path: %s", 568 server->leaf_fullpath); 569 } 570 571 seq_puts(m, "\nCompression: "); 572 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION)) 573 seq_puts(m, "no built-in support"); 574 else if (!server->compression.requested) 575 seq_puts(m, "disabled on mount"); 576 else if (server->compression.enabled) 577 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg)); 578 else 579 seq_puts(m, "disabled (not supported by this server)"); 580 581 /* Show negotiated encryption cipher, even if not required */ 582 seq_puts(m, "\nEncryption: "); 583 if (server->cipher_type) 584 seq_printf(m, "Negotiated cipher (%s)", cipher_alg_str(server->cipher_type)); 585 586 seq_printf(m, "\n\n\tSessions: "); 587 i = 0; 588 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 589 spin_lock(&ses->ses_lock); 590 if (ses->ses_status == SES_EXITING) { 591 spin_unlock(&ses->ses_lock); 592 continue; 593 } 594 i++; 595 if ((ses->serverDomain == NULL) || 596 (ses->serverOS == NULL) || 597 (ses->serverNOS == NULL)) { 598 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ", 599 i, ses->ip_addr, ses->ses_count, 600 ses->capabilities, ses->ses_status); 601 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 602 seq_printf(m, "Guest "); 603 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 604 seq_printf(m, "Anonymous "); 605 } else { 606 seq_printf(m, 607 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s " 608 "\n\tNOS: %s\tCapability: 0x%x" 609 "\n\tSMB session status: %d ", 610 i, ses->ip_addr, ses->serverDomain, 611 ses->ses_count, ses->serverOS, ses->serverNOS, 612 ses->capabilities, ses->ses_status); 613 } 614 if (ses->expired_pwd) 615 seq_puts(m, "password no longer valid "); 616 spin_unlock(&ses->ses_lock); 617 618 seq_printf(m, "\n\tSecurity type: %s ", 619 get_security_type_str(server->ops->select_sectype(server, ses->sectype))); 620 621 /* dump session id helpful for use with network trace */ 622 seq_printf(m, " SessionId: 0x%llx", ses->Suid); 623 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 624 seq_puts(m, " encrypted"); 625 if (ses->sign) 626 seq_puts(m, " signed"); 627 628 seq_printf(m, "\n\tUser: %d Cred User: %d", 629 from_kuid(&init_user_ns, ses->linux_uid), 630 from_kuid(&init_user_ns, ses->cred_uid)); 631 632 if (ses->dfs_root_ses) { 633 seq_printf(m, "\n\tDFS root session id: 0x%llx", 634 ses->dfs_root_ses->Suid); 635 } 636 637 spin_lock(&ses->chan_lock); 638 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0)) 639 seq_puts(m, "\tPrimary channel: DISCONNECTED "); 640 if (CIFS_CHAN_IN_RECONNECT(ses, 0)) 641 seq_puts(m, "\t[RECONNECTING] "); 642 643 if (ses->chan_count > 1) { 644 seq_printf(m, "\n\n\tExtra Channels: %zu ", 645 ses->chan_count-1); 646 for (j = 1; j < ses->chan_count; j++) { 647 cifs_dump_channel(m, j, &ses->chans[j]); 648 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j)) 649 seq_puts(m, "\tDISCONNECTED "); 650 if (CIFS_CHAN_IN_RECONNECT(ses, j)) 651 seq_puts(m, "\t[RECONNECTING] "); 652 } 653 } 654 spin_unlock(&ses->chan_lock); 655 656 seq_puts(m, "\n\n\tShares: "); 657 j = 0; 658 659 seq_printf(m, "\n\t%d) IPC: ", j); 660 if (ses->tcon_ipc) 661 cifs_debug_tcon(m, ses->tcon_ipc); 662 else 663 seq_puts(m, "none\n"); 664 665 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 666 ++j; 667 seq_printf(m, "\n\t%d) ", j); 668 cifs_debug_tcon(m, tcon); 669 } 670 671 spin_lock(&ses->iface_lock); 672 if (ses->iface_count) 673 seq_printf(m, "\n\n\tServer interfaces: %zu" 674 "\tLast updated: %lu seconds ago", 675 ses->iface_count, 676 (jiffies - ses->iface_last_update) / HZ); 677 678 last_iface = list_last_entry(&ses->iface_list, 679 struct cifs_server_iface, 680 iface_head); 681 iface_min_speed = last_iface->speed; 682 683 j = 0; 684 list_for_each_entry(iface, &ses->iface_list, 685 iface_head) { 686 seq_printf(m, "\n\t%d)", ++j); 687 cifs_dump_iface(m, iface); 688 689 iface_weight = iface->speed / iface_min_speed; 690 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)" 691 "\n\t\tAllocated channels: %u\n", 692 iface->weight_fulfilled, 693 iface_weight, 694 iface->num_channels); 695 696 if (is_ses_using_iface(ses, iface)) 697 seq_puts(m, "\t\t[CONNECTED]\n"); 698 } 699 spin_unlock(&ses->iface_lock); 700 701 seq_puts(m, "\n\n\tMIDs: "); 702 spin_lock(&ses->chan_lock); 703 for (j = 0; j < ses->chan_count; j++) { 704 chan_server = ses->chans[j].server; 705 if (!chan_server) 706 continue; 707 708 if (list_empty(&chan_server->pending_mid_q)) 709 continue; 710 711 seq_printf(m, "\n\tServer ConnectionId: 0x%llx", 712 chan_server->conn_id); 713 spin_lock(&chan_server->mid_queue_lock); 714 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) { 715 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu", 716 mid_entry->mid_state, 717 le16_to_cpu(mid_entry->command), 718 mid_entry->pid, 719 mid_entry->callback_data, 720 mid_entry->mid); 721 } 722 spin_unlock(&chan_server->mid_queue_lock); 723 } 724 spin_unlock(&ses->chan_lock); 725 seq_puts(m, "\n--\n"); 726 } 727 if (i == 0) 728 seq_printf(m, "\n\t\t[NONE]"); 729 } 730 if (c == 0) 731 seq_printf(m, "\n\t[NONE]"); 732 733 spin_unlock(&cifs_tcp_ses_lock); 734 seq_putc(m, '\n'); 735 cifs_swn_dump(m); 736 737 /* BB add code to dump additional info such as TCP session info now */ 738 return 0; 739 } 740 741 static ssize_t cifs_stats_proc_write(struct file *file, 742 const char __user *buffer, size_t count, loff_t *ppos) 743 { 744 bool bv; 745 int rc; 746 struct TCP_Server_Info *server; 747 struct cifs_ses *ses; 748 struct cifs_tcon *tcon; 749 750 rc = kstrtobool_from_user(buffer, count, &bv); 751 if (rc == 0) { 752 #ifdef CONFIG_CIFS_STATS2 753 int i; 754 755 atomic_set(&total_buf_alloc_count, 0); 756 atomic_set(&total_small_buf_alloc_count, 0); 757 #endif /* CONFIG_CIFS_STATS2 */ 758 atomic_set(&tcpSesReconnectCount, 0); 759 atomic_set(&tconInfoReconnectCount, 0); 760 761 spin_lock(&GlobalMid_Lock); 762 GlobalMaxActiveXid = 0; 763 GlobalCurrentXid = 0; 764 spin_unlock(&GlobalMid_Lock); 765 spin_lock(&cifs_tcp_ses_lock); 766 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 767 server->max_in_flight = 0; 768 #ifdef CONFIG_CIFS_STATS2 769 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 770 atomic_set(&server->num_cmds[i], 0); 771 atomic_set(&server->smb2slowcmd[i], 0); 772 server->time_per_cmd[i] = 0; 773 server->slowest_cmd[i] = 0; 774 server->fastest_cmd[0] = 0; 775 } 776 #endif /* CONFIG_CIFS_STATS2 */ 777 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 778 if (cifs_ses_exiting(ses)) 779 continue; 780 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 781 atomic_set(&tcon->num_smbs_sent, 0); 782 spin_lock(&tcon->stat_lock); 783 tcon->bytes_read = 0; 784 tcon->bytes_written = 0; 785 tcon->stats_from_time = ktime_get_real_seconds(); 786 spin_unlock(&tcon->stat_lock); 787 if (server->ops->clear_stats) 788 server->ops->clear_stats(tcon); 789 } 790 } 791 } 792 spin_unlock(&cifs_tcp_ses_lock); 793 } else { 794 return rc; 795 } 796 797 return count; 798 } 799 800 static int cifs_stats_proc_show(struct seq_file *m, void *v) 801 { 802 int i; 803 #ifdef CONFIG_CIFS_STATS2 804 int j; 805 #endif /* STATS2 */ 806 struct TCP_Server_Info *server; 807 struct cifs_ses *ses; 808 struct cifs_tcon *tcon; 809 810 seq_printf(m, "Resources in use\nCIFS Session: %d\n", 811 sesInfoAllocCount.counter); 812 seq_printf(m, "Share (unique mount targets): %d\n", 813 tconInfoAllocCount.counter); 814 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", 815 buf_alloc_count.counter, 816 cifs_min_rcv + tcpSesAllocCount.counter); 817 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", 818 small_buf_alloc_count.counter, cifs_min_small); 819 #ifdef CONFIG_CIFS_STATS2 820 seq_printf(m, "Total Large %d Small %d Allocations\n", 821 atomic_read(&total_buf_alloc_count), 822 atomic_read(&total_small_buf_alloc_count)); 823 #endif /* CONFIG_CIFS_STATS2 */ 824 825 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count)); 826 seq_printf(m, 827 "\n%d session %d share reconnects\n", 828 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); 829 830 seq_printf(m, 831 "Total vfs operations: %d maximum at one time: %d\n", 832 GlobalCurrentXid, GlobalMaxActiveXid); 833 834 i = 0; 835 spin_lock(&cifs_tcp_ses_lock); 836 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 837 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); 838 #ifdef CONFIG_CIFS_STATS2 839 seq_puts(m, "\nTotal time spent processing by command. Time "); 840 seq_printf(m, "units are jiffies (%d per second)\n", HZ); 841 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n"); 842 seq_puts(m, " --------\t------\t----------\t-------\t-------\n"); 843 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 844 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j, 845 atomic_read(&server->num_cmds[j]), 846 server->time_per_cmd[j], 847 server->fastest_cmd[j], 848 server->slowest_cmd[j]); 849 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 850 if (atomic_read(&server->smb2slowcmd[j])) { 851 spin_lock(&server->srv_lock); 852 seq_printf(m, " %d slow responses from %s for command %d\n", 853 atomic_read(&server->smb2slowcmd[j]), 854 server->hostname, j); 855 spin_unlock(&server->srv_lock); 856 } 857 #endif /* STATS2 */ 858 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 859 if (cifs_ses_exiting(ses)) 860 continue; 861 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 862 i++; 863 seq_printf(m, "\n%d) %s", i, tcon->tree_name); 864 if (tcon->need_reconnect) 865 seq_puts(m, "\tDISCONNECTED "); 866 seq_printf(m, "\nSMBs: %d since %ptTs UTC", 867 atomic_read(&tcon->num_smbs_sent), 868 &tcon->stats_from_time); 869 if (server->ops->print_stats) 870 server->ops->print_stats(m, tcon); 871 } 872 } 873 } 874 spin_unlock(&cifs_tcp_ses_lock); 875 876 seq_putc(m, '\n'); 877 return 0; 878 } 879 880 static int cifs_stats_proc_open(struct inode *inode, struct file *file) 881 { 882 return single_open(file, cifs_stats_proc_show, NULL); 883 } 884 885 static const struct proc_ops cifs_stats_proc_ops = { 886 .proc_open = cifs_stats_proc_open, 887 .proc_read = seq_read, 888 .proc_lseek = seq_lseek, 889 .proc_release = single_release, 890 .proc_write = cifs_stats_proc_write, 891 }; 892 893 #ifdef CONFIG_CIFS_SMB_DIRECT 894 #define PROC_FILE_DEFINE(name) \ 895 static ssize_t name##_write(struct file *file, const char __user *buffer, \ 896 size_t count, loff_t *ppos) \ 897 { \ 898 int rc; \ 899 rc = kstrtoint_from_user(buffer, count, 10, &name); \ 900 if (rc) \ 901 return rc; \ 902 return count; \ 903 } \ 904 static int name##_proc_show(struct seq_file *m, void *v) \ 905 { \ 906 seq_printf(m, "%d\n", name); \ 907 return 0; \ 908 } \ 909 static int name##_open(struct inode *inode, struct file *file) \ 910 { \ 911 return single_open(file, name##_proc_show, NULL); \ 912 } \ 913 \ 914 static const struct proc_ops cifs_##name##_proc_fops = { \ 915 .proc_open = name##_open, \ 916 .proc_read = seq_read, \ 917 .proc_lseek = seq_lseek, \ 918 .proc_release = single_release, \ 919 .proc_write = name##_write, \ 920 } 921 922 PROC_FILE_DEFINE(rdma_readwrite_threshold); 923 PROC_FILE_DEFINE(smbd_max_frmr_depth); 924 PROC_FILE_DEFINE(smbd_keep_alive_interval); 925 PROC_FILE_DEFINE(smbd_max_receive_size); 926 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size); 927 PROC_FILE_DEFINE(smbd_max_send_size); 928 PROC_FILE_DEFINE(smbd_send_credit_target); 929 PROC_FILE_DEFINE(smbd_receive_credit_max); 930 #endif 931 932 static struct proc_dir_entry *proc_fs_cifs; 933 static const struct proc_ops cifsFYI_proc_ops; 934 static const struct proc_ops cifs_lookup_cache_proc_ops; 935 static const struct proc_ops traceSMB_proc_ops; 936 static const struct proc_ops cifs_security_flags_proc_ops; 937 static const struct proc_ops cifs_linux_ext_proc_ops; 938 static const struct proc_ops cifs_mount_params_proc_ops; 939 940 void 941 cifs_proc_init(void) 942 { 943 proc_fs_cifs = proc_mkdir("fs/cifs", NULL); 944 if (proc_fs_cifs == NULL) 945 return; 946 947 proc_create_single("DebugData", 0, proc_fs_cifs, 948 cifs_debug_data_proc_show); 949 950 proc_create_single("open_files", 0400, proc_fs_cifs, 951 cifs_debug_files_proc_show); 952 953 proc_create_single("open_dirs", 0400, proc_fs_cifs, 954 cifs_debug_dirs_proc_show); 955 956 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); 957 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); 958 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); 959 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, 960 &cifs_linux_ext_proc_ops); 961 proc_create("SecurityFlags", 0644, proc_fs_cifs, 962 &cifs_security_flags_proc_ops); 963 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, 964 &cifs_lookup_cache_proc_ops); 965 966 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops); 967 968 #ifdef CONFIG_CIFS_DFS_UPCALL 969 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); 970 #endif 971 972 #ifdef CONFIG_CIFS_SMB_DIRECT 973 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs, 974 &cifs_rdma_readwrite_threshold_proc_fops); 975 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs, 976 &cifs_smbd_max_frmr_depth_proc_fops); 977 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs, 978 &cifs_smbd_keep_alive_interval_proc_fops); 979 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs, 980 &cifs_smbd_max_receive_size_proc_fops); 981 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs, 982 &cifs_smbd_max_fragmented_recv_size_proc_fops); 983 proc_create("smbd_max_send_size", 0644, proc_fs_cifs, 984 &cifs_smbd_max_send_size_proc_fops); 985 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs, 986 &cifs_smbd_send_credit_target_proc_fops); 987 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs, 988 &cifs_smbd_receive_credit_max_proc_fops); 989 #endif 990 } 991 992 void 993 cifs_proc_clean(void) 994 { 995 if (proc_fs_cifs == NULL) 996 return; 997 998 remove_proc_entry("DebugData", proc_fs_cifs); 999 remove_proc_entry("open_files", proc_fs_cifs); 1000 remove_proc_entry("open_dirs", proc_fs_cifs); 1001 remove_proc_entry("cifsFYI", proc_fs_cifs); 1002 remove_proc_entry("traceSMB", proc_fs_cifs); 1003 remove_proc_entry("Stats", proc_fs_cifs); 1004 remove_proc_entry("SecurityFlags", proc_fs_cifs); 1005 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); 1006 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); 1007 remove_proc_entry("mount_params", proc_fs_cifs); 1008 1009 #ifdef CONFIG_CIFS_DFS_UPCALL 1010 remove_proc_entry("dfscache", proc_fs_cifs); 1011 #endif 1012 #ifdef CONFIG_CIFS_SMB_DIRECT 1013 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs); 1014 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs); 1015 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs); 1016 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs); 1017 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs); 1018 remove_proc_entry("smbd_max_send_size", proc_fs_cifs); 1019 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs); 1020 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs); 1021 #endif 1022 remove_proc_entry("fs/cifs", NULL); 1023 } 1024 1025 static int cifsFYI_proc_show(struct seq_file *m, void *v) 1026 { 1027 seq_printf(m, "%d\n", cifsFYI); 1028 return 0; 1029 } 1030 1031 static int cifsFYI_proc_open(struct inode *inode, struct file *file) 1032 { 1033 return single_open(file, cifsFYI_proc_show, NULL); 1034 } 1035 1036 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, 1037 size_t count, loff_t *ppos) 1038 { 1039 char c[2] = { '\0' }; 1040 bool bv; 1041 int rc; 1042 1043 rc = get_user(c[0], buffer); 1044 if (rc) 1045 return rc; 1046 if (kstrtobool(c, &bv) == 0) 1047 cifsFYI = bv; 1048 else if ((c[0] > '1') && (c[0] <= '9')) 1049 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ 1050 else 1051 return -EINVAL; 1052 1053 return count; 1054 } 1055 1056 static const struct proc_ops cifsFYI_proc_ops = { 1057 .proc_open = cifsFYI_proc_open, 1058 .proc_read = seq_read, 1059 .proc_lseek = seq_lseek, 1060 .proc_release = single_release, 1061 .proc_write = cifsFYI_proc_write, 1062 }; 1063 1064 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) 1065 { 1066 seq_printf(m, "%d\n", linuxExtEnabled); 1067 return 0; 1068 } 1069 1070 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) 1071 { 1072 return single_open(file, cifs_linux_ext_proc_show, NULL); 1073 } 1074 1075 static ssize_t cifs_linux_ext_proc_write(struct file *file, 1076 const char __user *buffer, size_t count, loff_t *ppos) 1077 { 1078 int rc; 1079 1080 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); 1081 if (rc) 1082 return rc; 1083 1084 return count; 1085 } 1086 1087 static const struct proc_ops cifs_linux_ext_proc_ops = { 1088 .proc_open = cifs_linux_ext_proc_open, 1089 .proc_read = seq_read, 1090 .proc_lseek = seq_lseek, 1091 .proc_release = single_release, 1092 .proc_write = cifs_linux_ext_proc_write, 1093 }; 1094 1095 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) 1096 { 1097 seq_printf(m, "%d\n", lookupCacheEnabled); 1098 return 0; 1099 } 1100 1101 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) 1102 { 1103 return single_open(file, cifs_lookup_cache_proc_show, NULL); 1104 } 1105 1106 static ssize_t cifs_lookup_cache_proc_write(struct file *file, 1107 const char __user *buffer, size_t count, loff_t *ppos) 1108 { 1109 int rc; 1110 1111 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); 1112 if (rc) 1113 return rc; 1114 1115 return count; 1116 } 1117 1118 static const struct proc_ops cifs_lookup_cache_proc_ops = { 1119 .proc_open = cifs_lookup_cache_proc_open, 1120 .proc_read = seq_read, 1121 .proc_lseek = seq_lseek, 1122 .proc_release = single_release, 1123 .proc_write = cifs_lookup_cache_proc_write, 1124 }; 1125 1126 static int traceSMB_proc_show(struct seq_file *m, void *v) 1127 { 1128 seq_printf(m, "%d\n", traceSMB); 1129 return 0; 1130 } 1131 1132 static int traceSMB_proc_open(struct inode *inode, struct file *file) 1133 { 1134 return single_open(file, traceSMB_proc_show, NULL); 1135 } 1136 1137 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, 1138 size_t count, loff_t *ppos) 1139 { 1140 int rc; 1141 1142 rc = kstrtobool_from_user(buffer, count, &traceSMB); 1143 if (rc) 1144 return rc; 1145 1146 return count; 1147 } 1148 1149 static const struct proc_ops traceSMB_proc_ops = { 1150 .proc_open = traceSMB_proc_open, 1151 .proc_read = seq_read, 1152 .proc_lseek = seq_lseek, 1153 .proc_release = single_release, 1154 .proc_write = traceSMB_proc_write, 1155 }; 1156 1157 static int cifs_security_flags_proc_show(struct seq_file *m, void *v) 1158 { 1159 seq_printf(m, "0x%x\n", global_secflags); 1160 return 0; 1161 } 1162 1163 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) 1164 { 1165 return single_open(file, cifs_security_flags_proc_show, NULL); 1166 } 1167 1168 /* 1169 * Ensure that if someone sets a MUST flag, that we disable all other MAY 1170 * flags except for the ones corresponding to the given MUST flag. If there are 1171 * multiple MUST flags, then try to prefer more secure ones. 1172 */ 1173 static void 1174 cifs_security_flags_handle_must_flags(unsigned int *flags) 1175 { 1176 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL); 1177 1178 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) 1179 *flags = CIFSSEC_MUST_KRB5; 1180 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) 1181 *flags = CIFSSEC_MUST_NTLMSSP; 1182 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) 1183 *flags = CIFSSEC_MUST_NTLMV2; 1184 1185 *flags |= signflags; 1186 } 1187 1188 static ssize_t cifs_security_flags_proc_write(struct file *file, 1189 const char __user *buffer, size_t count, loff_t *ppos) 1190 { 1191 int rc; 1192 unsigned int flags; 1193 char flags_string[12]; 1194 bool bv; 1195 1196 if ((count < 1) || (count > 11)) 1197 return -EINVAL; 1198 1199 memset(flags_string, 0, sizeof(flags_string)); 1200 1201 if (copy_from_user(flags_string, buffer, count)) 1202 return -EFAULT; 1203 1204 if (count < 3) { 1205 /* single char or single char followed by null */ 1206 if (kstrtobool(flags_string, &bv) == 0) { 1207 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; 1208 return count; 1209 } else if (!isdigit(flags_string[0])) { 1210 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1211 flags_string); 1212 return -EINVAL; 1213 } 1214 } 1215 1216 /* else we have a number */ 1217 rc = kstrtouint(flags_string, 0, &flags); 1218 if (rc) { 1219 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1220 flags_string); 1221 return rc; 1222 } 1223 1224 cifs_dbg(FYI, "sec flags 0x%x\n", flags); 1225 1226 if (flags == 0) { 1227 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); 1228 return -EINVAL; 1229 } 1230 1231 if (flags & ~CIFSSEC_MASK) { 1232 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", 1233 flags & ~CIFSSEC_MASK); 1234 return -EINVAL; 1235 } 1236 1237 cifs_security_flags_handle_must_flags(&flags); 1238 1239 /* flags look ok - update the global security flags for cifs module */ 1240 global_secflags = flags; 1241 if (global_secflags & CIFSSEC_MUST_SIGN) { 1242 /* requiring signing implies signing is allowed */ 1243 global_secflags |= CIFSSEC_MAY_SIGN; 1244 cifs_dbg(FYI, "packet signing now required\n"); 1245 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { 1246 cifs_dbg(FYI, "packet signing disabled\n"); 1247 } 1248 /* BB should we turn on MAY flags for other MUST options? */ 1249 return count; 1250 } 1251 1252 static const struct proc_ops cifs_security_flags_proc_ops = { 1253 .proc_open = cifs_security_flags_proc_open, 1254 .proc_read = seq_read, 1255 .proc_lseek = seq_lseek, 1256 .proc_release = single_release, 1257 .proc_write = cifs_security_flags_proc_write, 1258 }; 1259 1260 /* To make it easier to debug, can help to show mount params */ 1261 static int cifs_mount_params_proc_show(struct seq_file *m, void *v) 1262 { 1263 const struct fs_parameter_spec *p; 1264 const char *type; 1265 1266 for (p = smb3_fs_parameters; p->name; p++) { 1267 /* cannot use switch with pointers... */ 1268 if (!p->type) { 1269 if (p->flags == fs_param_neg_with_no) 1270 type = "noflag"; 1271 else 1272 type = "flag"; 1273 } else if (p->type == fs_param_is_bool) 1274 type = "bool"; 1275 else if (p->type == fs_param_is_u32) 1276 type = "u32"; 1277 else if (p->type == fs_param_is_u64) 1278 type = "u64"; 1279 else if (p->type == fs_param_is_string) 1280 type = "string"; 1281 else 1282 type = "unknown"; 1283 1284 seq_printf(m, "%s:%s\n", p->name, type); 1285 } 1286 1287 return 0; 1288 } 1289 1290 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file) 1291 { 1292 return single_open(file, cifs_mount_params_proc_show, NULL); 1293 } 1294 1295 static const struct proc_ops cifs_mount_params_proc_ops = { 1296 .proc_open = cifs_mount_params_proc_open, 1297 .proc_read = seq_read, 1298 .proc_lseek = seq_lseek, 1299 .proc_release = single_release, 1300 /* No need for write for now */ 1301 /* .proc_write = cifs_mount_params_proc_write, */ 1302 }; 1303 1304 #else 1305 void cifs_proc_init(void) 1306 { 1307 } 1308 1309 void cifs_proc_clean(void) 1310 { 1311 } 1312 #endif /* PROC_FS */ 1313