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 #endif 27 #include "cifs_swn.h" 28 #include "cached_dir.h" 29 30 void 31 cifs_dump_mem(char *label, void *data, int length) 32 { 33 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data); 34 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4, 35 data, length, true); 36 } 37 38 void cifs_dump_mids(struct TCP_Server_Info *server) 39 { 40 #ifdef CONFIG_CIFS_DEBUG2 41 struct mid_q_entry *mid_entry; 42 43 if (server == NULL) 44 return; 45 46 cifs_dbg(VFS, "Dump pending requests:\n"); 47 spin_lock(&server->mid_queue_lock); 48 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { 49 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n", 50 mid_entry->mid_state, 51 le16_to_cpu(mid_entry->command), 52 mid_entry->pid, 53 mid_entry->callback_data, 54 mid_entry->mid); 55 #ifdef CONFIG_CIFS_STATS2 56 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n", 57 mid_entry->large_buf, 58 mid_entry->resp_buf, 59 mid_entry->when_received, 60 jiffies); 61 #endif /* STATS2 */ 62 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n", 63 mid_entry->multiRsp, mid_entry->multiEnd); 64 if (mid_entry->resp_buf) { 65 server->ops->dump_detail(mid_entry->resp_buf, 66 mid_entry->response_pdu_len, server); 67 cifs_dump_mem("existing buf: ", mid_entry->resp_buf, 62); 68 } 69 } 70 spin_unlock(&server->mid_queue_lock); 71 #endif /* CONFIG_CIFS_DEBUG2 */ 72 } 73 74 #ifdef CONFIG_PROC_FS 75 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon) 76 { 77 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); 78 79 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count); 80 if (tcon->nativeFileSystem) 81 seq_printf(m, "Type: %s ", tcon->nativeFileSystem); 82 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d", 83 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), 84 le32_to_cpu(tcon->fsAttrInfo.Attributes), 85 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), 86 tcon->status); 87 if (dev_type == FILE_DEVICE_DISK) 88 seq_puts(m, " type: DISK "); 89 else if (dev_type == FILE_DEVICE_CD_ROM) 90 seq_puts(m, " type: CDROM "); 91 else 92 seq_printf(m, " type: %d ", dev_type); 93 94 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number); 95 96 if ((tcon->seal) || 97 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || 98 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) 99 seq_puts(m, " encrypted"); 100 if (tcon->nocase) 101 seq_printf(m, " nocase"); 102 if (tcon->unix_ext) 103 seq_printf(m, " POSIX Extensions"); 104 if (tcon->ses->server->ops->dump_share_caps) 105 tcon->ses->server->ops->dump_share_caps(m, tcon); 106 if (tcon->use_witness) 107 seq_puts(m, " Witness"); 108 if (tcon->broken_sparse_sup) 109 seq_puts(m, " nosparse"); 110 if (tcon->need_reconnect) 111 seq_puts(m, "\tDISCONNECTED "); 112 spin_lock(&tcon->tc_lock); 113 if (tcon->origin_fullpath) { 114 seq_printf(m, "\n\tDFS origin fullpath: %s", 115 tcon->origin_fullpath); 116 } 117 spin_unlock(&tcon->tc_lock); 118 seq_putc(m, '\n'); 119 } 120 121 static void 122 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) 123 { 124 struct TCP_Server_Info *server = chan->server; 125 126 if (!server) { 127 seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1); 128 return; 129 } 130 131 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx" 132 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x" 133 "\n\t\tTCP status: %d Instance: %d" 134 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d" 135 "\n\t\tIn Send: %d In MaxReq Wait: %d", 136 i+1, server->conn_id, 137 server->credits, 138 server->echo_credits, 139 server->oplock_credits, 140 server->dialect, 141 server->tcpStatus, 142 server->reconnect_instance, 143 server->srv_count, 144 server->sec_mode, 145 in_flight(server), 146 atomic_read(&server->in_send), 147 atomic_read(&server->num_waiters)); 148 #ifdef CONFIG_NET_NS 149 if (server->net) 150 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 151 #endif /* NET_NS */ 152 153 } 154 155 static inline const char *smb_speed_to_str(size_t bps) 156 { 157 size_t mbps = bps / 1000 / 1000; 158 159 switch (mbps) { 160 case SPEED_10: 161 return "10Mbps"; 162 case SPEED_100: 163 return "100Mbps"; 164 case SPEED_1000: 165 return "1Gbps"; 166 case SPEED_2500: 167 return "2.5Gbps"; 168 case SPEED_5000: 169 return "5Gbps"; 170 case SPEED_10000: 171 return "10Gbps"; 172 case SPEED_14000: 173 return "14Gbps"; 174 case SPEED_20000: 175 return "20Gbps"; 176 case SPEED_25000: 177 return "25Gbps"; 178 case SPEED_40000: 179 return "40Gbps"; 180 case SPEED_50000: 181 return "50Gbps"; 182 case SPEED_56000: 183 return "56Gbps"; 184 case SPEED_100000: 185 return "100Gbps"; 186 case SPEED_200000: 187 return "200Gbps"; 188 case SPEED_400000: 189 return "400Gbps"; 190 case SPEED_800000: 191 return "800Gbps"; 192 default: 193 return "Unknown"; 194 } 195 } 196 197 static void 198 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface) 199 { 200 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; 201 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; 202 203 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed)); 204 seq_puts(m, "\t\tCapabilities: "); 205 if (iface->rdma_capable) 206 seq_puts(m, "rdma "); 207 if (iface->rss_capable) 208 seq_puts(m, "rss "); 209 if (!iface->rdma_capable && !iface->rss_capable) 210 seq_puts(m, "None"); 211 seq_putc(m, '\n'); 212 if (iface->sockaddr.ss_family == AF_INET) 213 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr); 214 else if (iface->sockaddr.ss_family == AF_INET6) 215 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr); 216 if (!iface->is_active) 217 seq_puts(m, "\t\t[for-cleanup]\n"); 218 } 219 220 static int cifs_debug_files_proc_show(struct seq_file *m, void *v) 221 { 222 struct TCP_Server_Info *server; 223 struct cifs_ses *ses; 224 struct cifs_tcon *tcon; 225 struct cifsFileInfo *cfile; 226 struct inode *inode; 227 struct cifsInodeInfo *cinode; 228 char lease[4]; 229 int n; 230 231 seq_puts(m, "# Version:1\n"); 232 seq_puts(m, "# Format:\n"); 233 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>"); 234 #ifdef CONFIG_CIFS_DEBUG2 235 seq_puts(m, " <filename> <lease> <lease-key> <mid>\n"); 236 #else 237 seq_puts(m, " <filename> <lease> <lease-key>\n"); 238 #endif /* CIFS_DEBUG2 */ 239 spin_lock(&cifs_tcp_ses_lock); 240 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 241 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 242 if (cifs_ses_exiting(ses)) 243 continue; 244 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 245 spin_lock(&tcon->open_file_lock); 246 list_for_each_entry(cfile, &tcon->openFileList, tlist) { 247 seq_printf(m, 248 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd", 249 tcon->tid, 250 ses->Suid, 251 cfile->fid.persistent_fid, 252 cfile->f_flags, 253 cfile->count, 254 cfile->pid, 255 from_kuid(&init_user_ns, cfile->uid), 256 cfile->dentry); 257 258 /* Append lease/oplock caching state as RHW letters */ 259 inode = d_inode(cfile->dentry); 260 cinode = NULL; 261 n = 0; 262 if (inode) { 263 cinode = CIFS_I(inode); 264 if (CIFS_CACHE_READ(cinode)) 265 lease[n++] = 'R'; 266 if (CIFS_CACHE_HANDLE(cinode)) 267 lease[n++] = 'H'; 268 if (CIFS_CACHE_WRITE(cinode)) 269 lease[n++] = 'W'; 270 } 271 lease[n] = '\0'; 272 seq_puts(m, " "); 273 if (n) 274 seq_printf(m, "%s", lease); 275 else 276 seq_puts(m, "NONE"); 277 278 seq_puts(m, " "); 279 if (cinode && cinode->lease_granted) 280 seq_printf(m, "%pUl", cinode->lease_key); 281 else 282 seq_puts(m, "-"); 283 284 #ifdef CONFIG_CIFS_DEBUG2 285 seq_printf(m, " %llu", cfile->fid.mid); 286 #endif /* CONFIG_CIFS_DEBUG2 */ 287 seq_printf(m, "\n"); 288 } 289 spin_unlock(&tcon->open_file_lock); 290 } 291 } 292 } 293 spin_unlock(&cifs_tcp_ses_lock); 294 seq_putc(m, '\n'); 295 return 0; 296 } 297 298 static int cifs_debug_dirs_proc_show(struct seq_file *m, void *v) 299 { 300 struct list_head *stmp, *tmp, *tmp1; 301 struct TCP_Server_Info *server; 302 struct cifs_ses *ses; 303 struct cifs_tcon *tcon; 304 struct cached_fids *cfids; 305 struct cached_fid *cfid; 306 LIST_HEAD(entry); 307 308 seq_puts(m, "# Version:1\n"); 309 #ifdef CONFIG_CIFS_DEBUG 310 seq_puts(m, "# Write 0 to this file to drop all cached directory entries\n"); 311 #endif /* CONFIG_CIFS_DEBUG */ 312 seq_puts(m, "# Format:\n"); 313 seq_puts(m, "# <tree id> <sess id> <persistent fid> <lease-key> <path>\n"); 314 315 spin_lock(&cifs_tcp_ses_lock); 316 list_for_each(stmp, &cifs_tcp_ses_list) { 317 server = list_entry(stmp, struct TCP_Server_Info, 318 tcp_ses_list); 319 list_for_each(tmp, &server->smb_ses_list) { 320 ses = list_entry(tmp, struct cifs_ses, smb_ses_list); 321 list_for_each(tmp1, &ses->tcon_list) { 322 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list); 323 cfids = tcon->cfids; 324 if (!cfids) 325 continue; 326 spin_lock(&cfids->cfid_list_lock); /* check lock ordering */ 327 seq_printf(m, "Num entries: %d, cached_dirents: %lu entries, %llu bytes\n", 328 cfids->num_entries, 329 (unsigned long)atomic_long_read(&cfids->total_dirents_entries), 330 (unsigned long long)atomic64_read(&cfids->total_dirents_bytes)); 331 list_for_each_entry(cfid, &cfids->entries, entry) { 332 seq_printf(m, "0x%x 0x%llx 0x%llx ", 333 tcon->tid, 334 ses->Suid, 335 cfid->fid.persistent_fid); 336 if (cfid->has_lease) 337 seq_printf(m, "%pUl ", cfid->fid.lease_key); 338 else 339 seq_puts(m, "- "); 340 seq_printf(m, "%s", cfid->path); 341 if (cfid->file_all_info_is_valid) 342 seq_printf(m, "\tvalid file info"); 343 if (cfid->dirents.is_valid) 344 seq_printf(m, ", valid dirents"); 345 if (!list_empty(&cfid->dirents.entries)) 346 seq_printf(m, ", dirents: %lu entries, %lu bytes", 347 cfid->dirents.entries_count, cfid->dirents.bytes_used); 348 seq_printf(m, "\n"); 349 } 350 spin_unlock(&cfids->cfid_list_lock); 351 } 352 } 353 } 354 spin_unlock(&cifs_tcp_ses_lock); 355 seq_putc(m, '\n'); 356 return 0; 357 } 358 359 #ifdef CONFIG_CIFS_DEBUG 360 static int cifs_debug_dirs_proc_open(struct inode *inode, struct file *file) 361 { 362 return single_open(file, cifs_debug_dirs_proc_show, NULL); 363 } 364 365 /* Drop all cached directory entries across all CIFS mounts. */ 366 static ssize_t cifs_debug_dirs_proc_write(struct file *file, const char __user *buffer, 367 size_t count, loff_t *ppos) 368 { 369 int rc, v; 370 371 rc = kstrtoint_from_user(buffer, count, 10, &v); 372 if (rc) 373 return rc; 374 375 if (v == 0) { 376 struct TCP_Server_Info *server; 377 struct cifs_ses *ses; 378 struct cifs_tcon *tcon; 379 380 spin_lock(&cifs_tcp_ses_lock); 381 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 382 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 383 if (cifs_ses_exiting(ses)) 384 continue; 385 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) 386 invalidate_all_cached_dirs(tcon, false); 387 } 388 } 389 spin_unlock(&cifs_tcp_ses_lock); 390 } 391 392 return count; 393 } 394 395 static const struct proc_ops cifs_debug_dirs_proc_ops = { 396 .proc_open = cifs_debug_dirs_proc_open, 397 .proc_read = seq_read, 398 .proc_lseek = seq_lseek, 399 .proc_release = single_release, 400 .proc_write = cifs_debug_dirs_proc_write, 401 }; 402 #endif /* CONFIG_CIFS_DEBUG */ 403 404 static __always_inline const char *compression_alg_str(__le16 alg) 405 { 406 switch (alg) { 407 case SMB3_COMPRESS_NONE: 408 return "NONE"; 409 case SMB3_COMPRESS_LZNT1: 410 return "LZNT1"; 411 case SMB3_COMPRESS_LZ77: 412 return "LZ77"; 413 case SMB3_COMPRESS_LZ77_HUFF: 414 return "LZ77-Huffman"; 415 case SMB3_COMPRESS_PATTERN: 416 return "Pattern_V1"; 417 default: 418 return "invalid"; 419 } 420 } 421 422 static __always_inline const char *cipher_alg_str(__le16 cipher) 423 { 424 switch (cipher) { 425 case SMB2_ENCRYPTION_AES128_CCM: 426 return "AES128-CCM"; 427 case SMB2_ENCRYPTION_AES128_GCM: 428 return "AES128-GCM"; 429 case SMB2_ENCRYPTION_AES256_CCM: 430 return "AES256-CCM"; 431 case SMB2_ENCRYPTION_AES256_GCM: 432 return "AES256-GCM"; 433 default: 434 return "UNKNOWN"; 435 } 436 } 437 438 static int cifs_debug_data_proc_show(struct seq_file *m, void *v) 439 { 440 struct mid_q_entry *mid_entry; 441 struct TCP_Server_Info *server; 442 struct TCP_Server_Info *chan_server; 443 struct cifs_ses *ses; 444 struct cifs_tcon *tcon; 445 struct cifs_server_iface *iface; 446 size_t iface_weight = 0, iface_min_speed = 0; 447 struct cifs_server_iface *last_iface = NULL; 448 int c, i, j; 449 450 seq_puts(m, 451 "Display Internal CIFS Data Structures for Debugging\n" 452 "---------------------------------------------------\n"); 453 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); 454 seq_printf(m, "Features:"); 455 #ifdef CONFIG_CIFS_DFS_UPCALL 456 seq_printf(m, " DFS"); 457 #endif 458 #ifdef CONFIG_CIFS_FSCACHE 459 seq_printf(m, ",FSCACHE"); 460 #endif 461 #ifdef CONFIG_CIFS_SMB_DIRECT 462 seq_printf(m, ",SMB_DIRECT"); 463 #endif 464 #ifdef CONFIG_CIFS_STATS2 465 seq_printf(m, ",STATS2"); 466 #else 467 seq_printf(m, ",STATS"); 468 #endif 469 #ifdef CONFIG_CIFS_DEBUG2 470 seq_printf(m, ",DEBUG2"); 471 #elif defined(CONFIG_CIFS_DEBUG) 472 seq_printf(m, ",DEBUG"); 473 #endif 474 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 475 seq_printf(m, ",ALLOW_INSECURE_LEGACY"); 476 #endif 477 #ifdef CONFIG_CIFS_POSIX 478 seq_printf(m, ",CIFS_POSIX"); 479 #endif 480 #ifdef CONFIG_CIFS_UPCALL 481 seq_printf(m, ",UPCALL(SPNEGO)"); 482 #endif 483 #ifdef CONFIG_CIFS_XATTR 484 seq_printf(m, ",XATTR"); 485 #endif 486 seq_printf(m, ",ACL"); 487 #ifdef CONFIG_CIFS_SWN_UPCALL 488 seq_puts(m, ",WITNESS"); 489 #endif 490 #ifdef CONFIG_CIFS_COMPRESSION 491 seq_puts(m, ",COMPRESSION"); 492 #endif 493 seq_putc(m, '\n'); 494 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize); 495 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); 496 497 seq_printf(m, "\nServers: "); 498 499 c = 0; 500 spin_lock(&cifs_tcp_ses_lock); 501 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 502 /* channel info will be printed as a part of sessions below */ 503 if (SERVER_IS_CHAN(server)) 504 continue; 505 506 c++; 507 seq_printf(m, "\n%d) ConnectionId: 0x%llx ", 508 c, server->conn_id); 509 510 spin_lock(&server->srv_lock); 511 if (server->hostname) 512 seq_printf(m, "Hostname: %s ", server->hostname); 513 seq_printf(m, "\nClientGUID: %pUL", server->client_guid); 514 spin_unlock(&server->srv_lock); 515 #ifdef CONFIG_CIFS_SMB_DIRECT 516 smbd_debug_proc_show(server, m); 517 #endif 518 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x", 519 server->credits, 520 server->echo_credits, 521 server->oplock_credits, 522 server->dialect); 523 if (server->sign) 524 seq_printf(m, " signed"); 525 if (server->posix_ext_supported) 526 seq_printf(m, " posix"); 527 if (server->nosharesock) 528 seq_printf(m, " nosharesock"); 529 530 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities); 531 532 if (server->rdma) 533 seq_printf(m, "\nRDMA "); 534 seq_printf(m, "\nTCP status: %d Instance: %d" 535 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d", 536 server->tcpStatus, 537 server->reconnect_instance, 538 server->srv_count, 539 server->sec_mode, in_flight(server)); 540 #ifdef CONFIG_NET_NS 541 if (server->net) 542 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 543 #endif /* NET_NS */ 544 545 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d", 546 atomic_read(&server->in_send), 547 atomic_read(&server->num_waiters)); 548 549 if (server->leaf_fullpath) { 550 seq_printf(m, "\nDFS leaf full path: %s", 551 server->leaf_fullpath); 552 } 553 554 seq_puts(m, "\nCompression: "); 555 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION)) 556 seq_puts(m, "no built-in support"); 557 else if (!server->compression.requested) 558 seq_puts(m, "disabled on mount"); 559 else if (server->compression.enabled) 560 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg)); 561 else 562 seq_puts(m, "disabled (not supported by this server)"); 563 564 /* Show negotiated encryption cipher, even if not required */ 565 seq_puts(m, "\nEncryption: "); 566 if (server->cipher_type) 567 seq_printf(m, "Negotiated cipher (%s)", cipher_alg_str(server->cipher_type)); 568 569 seq_printf(m, "\n\n\tSessions: "); 570 i = 0; 571 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 572 spin_lock(&ses->ses_lock); 573 if (ses->ses_status == SES_EXITING) { 574 spin_unlock(&ses->ses_lock); 575 continue; 576 } 577 i++; 578 if ((ses->serverDomain == NULL) || 579 (ses->serverOS == NULL) || 580 (ses->serverNOS == NULL)) { 581 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ", 582 i, ses->ip_addr, ses->ses_count, 583 ses->capabilities, ses->ses_status); 584 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 585 seq_printf(m, "Guest "); 586 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 587 seq_printf(m, "Anonymous "); 588 } else { 589 seq_printf(m, 590 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s " 591 "\n\tNOS: %s\tCapability: 0x%x" 592 "\n\tSMB session status: %d ", 593 i, ses->ip_addr, ses->serverDomain, 594 ses->ses_count, ses->serverOS, ses->serverNOS, 595 ses->capabilities, ses->ses_status); 596 } 597 if (ses->expired_pwd) 598 seq_puts(m, "password no longer valid "); 599 spin_unlock(&ses->ses_lock); 600 601 seq_printf(m, "\n\tSecurity type: %s ", 602 get_security_type_str(server->ops->select_sectype(server, ses->sectype))); 603 604 /* dump session id helpful for use with network trace */ 605 seq_printf(m, " SessionId: 0x%llx", ses->Suid); 606 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 607 seq_puts(m, " encrypted"); 608 if (ses->sign) 609 seq_puts(m, " signed"); 610 611 seq_printf(m, "\n\tUser: %d Cred User: %d", 612 from_kuid(&init_user_ns, ses->linux_uid), 613 from_kuid(&init_user_ns, ses->cred_uid)); 614 615 if (ses->dfs_root_ses) { 616 seq_printf(m, "\n\tDFS root session id: 0x%llx", 617 ses->dfs_root_ses->Suid); 618 } 619 620 spin_lock(&ses->chan_lock); 621 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0)) 622 seq_puts(m, "\tPrimary channel: DISCONNECTED "); 623 if (CIFS_CHAN_IN_RECONNECT(ses, 0)) 624 seq_puts(m, "\t[RECONNECTING] "); 625 626 if (ses->chan_count > 1) { 627 seq_printf(m, "\n\n\tExtra Channels: %zu ", 628 ses->chan_count-1); 629 for (j = 1; j < ses->chan_count; j++) { 630 cifs_dump_channel(m, j, &ses->chans[j]); 631 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j)) 632 seq_puts(m, "\tDISCONNECTED "); 633 if (CIFS_CHAN_IN_RECONNECT(ses, j)) 634 seq_puts(m, "\t[RECONNECTING] "); 635 } 636 } 637 spin_unlock(&ses->chan_lock); 638 639 seq_puts(m, "\n\n\tShares: "); 640 j = 0; 641 642 seq_printf(m, "\n\t%d) IPC: ", j); 643 if (ses->tcon_ipc) 644 cifs_debug_tcon(m, ses->tcon_ipc); 645 else 646 seq_puts(m, "none\n"); 647 648 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 649 ++j; 650 seq_printf(m, "\n\t%d) ", j); 651 cifs_debug_tcon(m, tcon); 652 } 653 654 spin_lock(&ses->iface_lock); 655 if (ses->iface_count) 656 seq_printf(m, "\n\n\tServer interfaces: %zu" 657 "\tLast updated: %lu seconds ago", 658 ses->iface_count, 659 (jiffies - ses->iface_last_update) / HZ); 660 661 last_iface = list_last_entry(&ses->iface_list, 662 struct cifs_server_iface, 663 iface_head); 664 iface_min_speed = last_iface->speed; 665 666 j = 0; 667 list_for_each_entry(iface, &ses->iface_list, 668 iface_head) { 669 seq_printf(m, "\n\t%d)", ++j); 670 cifs_dump_iface(m, iface); 671 672 iface_weight = iface->speed / iface_min_speed; 673 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)" 674 "\n\t\tAllocated channels: %u\n", 675 iface->weight_fulfilled, 676 iface_weight, 677 iface->num_channels); 678 679 if (is_ses_using_iface(ses, iface)) 680 seq_puts(m, "\t\t[CONNECTED]\n"); 681 } 682 spin_unlock(&ses->iface_lock); 683 684 seq_puts(m, "\n\n\tMIDs: "); 685 spin_lock(&ses->chan_lock); 686 for (j = 0; j < ses->chan_count; j++) { 687 chan_server = ses->chans[j].server; 688 if (!chan_server) 689 continue; 690 691 if (list_empty(&chan_server->pending_mid_q)) 692 continue; 693 694 seq_printf(m, "\n\tServer ConnectionId: 0x%llx", 695 chan_server->conn_id); 696 spin_lock(&chan_server->mid_queue_lock); 697 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) { 698 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu", 699 mid_entry->mid_state, 700 le16_to_cpu(mid_entry->command), 701 mid_entry->pid, 702 mid_entry->callback_data, 703 mid_entry->mid); 704 } 705 spin_unlock(&chan_server->mid_queue_lock); 706 } 707 spin_unlock(&ses->chan_lock); 708 seq_puts(m, "\n--\n"); 709 } 710 if (i == 0) 711 seq_printf(m, "\n\t\t[NONE]"); 712 } 713 if (c == 0) 714 seq_printf(m, "\n\t[NONE]"); 715 716 spin_unlock(&cifs_tcp_ses_lock); 717 seq_putc(m, '\n'); 718 cifs_swn_dump(m); 719 720 /* BB add code to dump additional info such as TCP session info now */ 721 return 0; 722 } 723 724 static ssize_t cifs_stats_proc_write(struct file *file, 725 const char __user *buffer, size_t count, loff_t *ppos) 726 { 727 bool bv; 728 int rc; 729 struct TCP_Server_Info *server; 730 struct cifs_ses *ses; 731 struct cifs_tcon *tcon; 732 733 rc = kstrtobool_from_user(buffer, count, &bv); 734 if (rc == 0) { 735 #ifdef CONFIG_CIFS_STATS2 736 int i; 737 738 atomic_set(&total_buf_alloc_count, 0); 739 atomic_set(&total_small_buf_alloc_count, 0); 740 #endif /* CONFIG_CIFS_STATS2 */ 741 atomic_set(&tcpSesReconnectCount, 0); 742 atomic_set(&tconInfoReconnectCount, 0); 743 744 spin_lock(&GlobalMid_Lock); 745 GlobalMaxActiveXid = 0; 746 GlobalCurrentXid = 0; 747 spin_unlock(&GlobalMid_Lock); 748 spin_lock(&cifs_tcp_ses_lock); 749 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 750 server->max_in_flight = 0; 751 #ifdef CONFIG_CIFS_STATS2 752 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 753 atomic_set(&server->num_cmds[i], 0); 754 atomic_set(&server->smb2slowcmd[i], 0); 755 server->time_per_cmd[i] = 0; 756 server->slowest_cmd[i] = 0; 757 server->fastest_cmd[0] = 0; 758 } 759 #endif /* CONFIG_CIFS_STATS2 */ 760 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 761 if (cifs_ses_exiting(ses)) 762 continue; 763 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 764 atomic_set(&tcon->num_smbs_sent, 0); 765 spin_lock(&tcon->stat_lock); 766 tcon->bytes_read = 0; 767 tcon->bytes_written = 0; 768 tcon->stats_from_time = ktime_get_real_seconds(); 769 spin_unlock(&tcon->stat_lock); 770 if (server->ops->clear_stats) 771 server->ops->clear_stats(tcon); 772 } 773 } 774 } 775 spin_unlock(&cifs_tcp_ses_lock); 776 } else { 777 return rc; 778 } 779 780 return count; 781 } 782 783 static int cifs_stats_proc_show(struct seq_file *m, void *v) 784 { 785 int i; 786 #ifdef CONFIG_CIFS_STATS2 787 int j; 788 #endif /* STATS2 */ 789 struct TCP_Server_Info *server; 790 struct cifs_ses *ses; 791 struct cifs_tcon *tcon; 792 793 seq_printf(m, "Resources in use\nCIFS Session: %d\n", 794 sesInfoAllocCount.counter); 795 seq_printf(m, "Share (unique mount targets): %d\n", 796 tconInfoAllocCount.counter); 797 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", 798 buf_alloc_count.counter, 799 cifs_min_rcv + tcpSesAllocCount.counter); 800 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", 801 small_buf_alloc_count.counter, cifs_min_small); 802 #ifdef CONFIG_CIFS_STATS2 803 seq_printf(m, "Total Large %d Small %d Allocations\n", 804 atomic_read(&total_buf_alloc_count), 805 atomic_read(&total_small_buf_alloc_count)); 806 #endif /* CONFIG_CIFS_STATS2 */ 807 808 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count)); 809 seq_printf(m, 810 "\n%d session %d share reconnects\n", 811 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); 812 813 seq_printf(m, 814 "Total vfs operations: %d maximum at one time: %d\n", 815 GlobalCurrentXid, GlobalMaxActiveXid); 816 817 i = 0; 818 spin_lock(&cifs_tcp_ses_lock); 819 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 820 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); 821 #ifdef CONFIG_CIFS_STATS2 822 seq_puts(m, "\nTotal time spent processing by command. Time "); 823 seq_printf(m, "units are jiffies (%d per second)\n", HZ); 824 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n"); 825 seq_puts(m, " --------\t------\t----------\t-------\t-------\n"); 826 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 827 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j, 828 atomic_read(&server->num_cmds[j]), 829 server->time_per_cmd[j], 830 server->fastest_cmd[j], 831 server->slowest_cmd[j]); 832 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 833 if (atomic_read(&server->smb2slowcmd[j])) { 834 spin_lock(&server->srv_lock); 835 seq_printf(m, " %d slow responses from %s for command %d\n", 836 atomic_read(&server->smb2slowcmd[j]), 837 server->hostname, j); 838 spin_unlock(&server->srv_lock); 839 } 840 #endif /* STATS2 */ 841 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 842 if (cifs_ses_exiting(ses)) 843 continue; 844 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 845 i++; 846 seq_printf(m, "\n%d) %s", i, tcon->tree_name); 847 if (tcon->need_reconnect) 848 seq_puts(m, "\tDISCONNECTED "); 849 seq_printf(m, "\nSMBs: %d since %ptTs UTC", 850 atomic_read(&tcon->num_smbs_sent), 851 &tcon->stats_from_time); 852 if (server->ops->print_stats) 853 server->ops->print_stats(m, tcon); 854 } 855 } 856 } 857 spin_unlock(&cifs_tcp_ses_lock); 858 859 seq_putc(m, '\n'); 860 return 0; 861 } 862 863 static int cifs_stats_proc_open(struct inode *inode, struct file *file) 864 { 865 return single_open(file, cifs_stats_proc_show, NULL); 866 } 867 868 static const struct proc_ops cifs_stats_proc_ops = { 869 .proc_open = cifs_stats_proc_open, 870 .proc_read = seq_read, 871 .proc_lseek = seq_lseek, 872 .proc_release = single_release, 873 .proc_write = cifs_stats_proc_write, 874 }; 875 876 #ifdef CONFIG_CIFS_SMB_DIRECT 877 #define PROC_FILE_DEFINE(name) \ 878 static ssize_t name##_write(struct file *file, const char __user *buffer, \ 879 size_t count, loff_t *ppos) \ 880 { \ 881 int rc; \ 882 rc = kstrtoint_from_user(buffer, count, 10, &name); \ 883 if (rc) \ 884 return rc; \ 885 return count; \ 886 } \ 887 static int name##_proc_show(struct seq_file *m, void *v) \ 888 { \ 889 seq_printf(m, "%d\n", name); \ 890 return 0; \ 891 } \ 892 static int name##_open(struct inode *inode, struct file *file) \ 893 { \ 894 return single_open(file, name##_proc_show, NULL); \ 895 } \ 896 \ 897 static const struct proc_ops cifs_##name##_proc_fops = { \ 898 .proc_open = name##_open, \ 899 .proc_read = seq_read, \ 900 .proc_lseek = seq_lseek, \ 901 .proc_release = single_release, \ 902 .proc_write = name##_write, \ 903 } 904 905 PROC_FILE_DEFINE(rdma_readwrite_threshold); 906 PROC_FILE_DEFINE(smbd_max_frmr_depth); 907 PROC_FILE_DEFINE(smbd_keep_alive_interval); 908 PROC_FILE_DEFINE(smbd_max_receive_size); 909 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size); 910 PROC_FILE_DEFINE(smbd_max_send_size); 911 PROC_FILE_DEFINE(smbd_send_credit_target); 912 PROC_FILE_DEFINE(smbd_receive_credit_max); 913 #endif 914 915 static struct proc_dir_entry *proc_fs_cifs; 916 static const struct proc_ops cifsFYI_proc_ops; 917 static const struct proc_ops cifs_lookup_cache_proc_ops; 918 static const struct proc_ops traceSMB_proc_ops; 919 static const struct proc_ops cifs_security_flags_proc_ops; 920 static const struct proc_ops cifs_linux_ext_proc_ops; 921 static const struct proc_ops cifs_mount_params_proc_ops; 922 923 void 924 cifs_proc_init(void) 925 { 926 proc_fs_cifs = proc_mkdir("fs/cifs", NULL); 927 if (proc_fs_cifs == NULL) 928 return; 929 930 proc_create_single("DebugData", 0, proc_fs_cifs, 931 cifs_debug_data_proc_show); 932 933 proc_create_single("open_files", 0400, proc_fs_cifs, 934 cifs_debug_files_proc_show); 935 936 #ifdef CONFIG_CIFS_DEBUG 937 proc_create("open_dirs", 0600, proc_fs_cifs, &cifs_debug_dirs_proc_ops); 938 #else /* CONFIG_CIFS_DEBUG */ 939 proc_create_single("open_dirs", 0400, proc_fs_cifs, cifs_debug_dirs_proc_show); 940 #endif /* !CONFIG_CIFS_DEBUG */ 941 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); 942 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); 943 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); 944 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, 945 &cifs_linux_ext_proc_ops); 946 proc_create("SecurityFlags", 0644, proc_fs_cifs, 947 &cifs_security_flags_proc_ops); 948 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, 949 &cifs_lookup_cache_proc_ops); 950 951 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops); 952 953 #ifdef CONFIG_CIFS_DFS_UPCALL 954 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); 955 #endif 956 957 #ifdef CONFIG_CIFS_SMB_DIRECT 958 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs, 959 &cifs_rdma_readwrite_threshold_proc_fops); 960 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs, 961 &cifs_smbd_max_frmr_depth_proc_fops); 962 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs, 963 &cifs_smbd_keep_alive_interval_proc_fops); 964 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs, 965 &cifs_smbd_max_receive_size_proc_fops); 966 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs, 967 &cifs_smbd_max_fragmented_recv_size_proc_fops); 968 proc_create("smbd_max_send_size", 0644, proc_fs_cifs, 969 &cifs_smbd_max_send_size_proc_fops); 970 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs, 971 &cifs_smbd_send_credit_target_proc_fops); 972 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs, 973 &cifs_smbd_receive_credit_max_proc_fops); 974 #endif 975 } 976 977 void 978 cifs_proc_clean(void) 979 { 980 if (proc_fs_cifs == NULL) 981 return; 982 983 remove_proc_entry("DebugData", proc_fs_cifs); 984 remove_proc_entry("open_files", proc_fs_cifs); 985 remove_proc_entry("open_dirs", proc_fs_cifs); 986 remove_proc_entry("cifsFYI", proc_fs_cifs); 987 remove_proc_entry("traceSMB", proc_fs_cifs); 988 remove_proc_entry("Stats", proc_fs_cifs); 989 remove_proc_entry("SecurityFlags", proc_fs_cifs); 990 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); 991 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); 992 remove_proc_entry("mount_params", proc_fs_cifs); 993 994 #ifdef CONFIG_CIFS_DFS_UPCALL 995 remove_proc_entry("dfscache", proc_fs_cifs); 996 #endif 997 #ifdef CONFIG_CIFS_SMB_DIRECT 998 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs); 999 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs); 1000 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs); 1001 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs); 1002 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs); 1003 remove_proc_entry("smbd_max_send_size", proc_fs_cifs); 1004 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs); 1005 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs); 1006 #endif 1007 remove_proc_entry("fs/cifs", NULL); 1008 } 1009 1010 static int cifsFYI_proc_show(struct seq_file *m, void *v) 1011 { 1012 seq_printf(m, "%d\n", cifsFYI); 1013 return 0; 1014 } 1015 1016 static int cifsFYI_proc_open(struct inode *inode, struct file *file) 1017 { 1018 return single_open(file, cifsFYI_proc_show, NULL); 1019 } 1020 1021 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, 1022 size_t count, loff_t *ppos) 1023 { 1024 char c[2] = { '\0' }; 1025 bool bv; 1026 int rc; 1027 1028 rc = get_user(c[0], buffer); 1029 if (rc) 1030 return rc; 1031 if (kstrtobool(c, &bv) == 0) 1032 cifsFYI = bv; 1033 else if ((c[0] > '1') && (c[0] <= '9')) 1034 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ 1035 else 1036 return -EINVAL; 1037 1038 return count; 1039 } 1040 1041 static const struct proc_ops cifsFYI_proc_ops = { 1042 .proc_open = cifsFYI_proc_open, 1043 .proc_read = seq_read, 1044 .proc_lseek = seq_lseek, 1045 .proc_release = single_release, 1046 .proc_write = cifsFYI_proc_write, 1047 }; 1048 1049 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) 1050 { 1051 seq_printf(m, "%d\n", linuxExtEnabled); 1052 return 0; 1053 } 1054 1055 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) 1056 { 1057 return single_open(file, cifs_linux_ext_proc_show, NULL); 1058 } 1059 1060 static ssize_t cifs_linux_ext_proc_write(struct file *file, 1061 const char __user *buffer, size_t count, loff_t *ppos) 1062 { 1063 int rc; 1064 1065 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); 1066 if (rc) 1067 return rc; 1068 1069 return count; 1070 } 1071 1072 static const struct proc_ops cifs_linux_ext_proc_ops = { 1073 .proc_open = cifs_linux_ext_proc_open, 1074 .proc_read = seq_read, 1075 .proc_lseek = seq_lseek, 1076 .proc_release = single_release, 1077 .proc_write = cifs_linux_ext_proc_write, 1078 }; 1079 1080 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) 1081 { 1082 seq_printf(m, "%d\n", lookupCacheEnabled); 1083 return 0; 1084 } 1085 1086 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) 1087 { 1088 return single_open(file, cifs_lookup_cache_proc_show, NULL); 1089 } 1090 1091 static ssize_t cifs_lookup_cache_proc_write(struct file *file, 1092 const char __user *buffer, size_t count, loff_t *ppos) 1093 { 1094 int rc; 1095 1096 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); 1097 if (rc) 1098 return rc; 1099 1100 return count; 1101 } 1102 1103 static const struct proc_ops cifs_lookup_cache_proc_ops = { 1104 .proc_open = cifs_lookup_cache_proc_open, 1105 .proc_read = seq_read, 1106 .proc_lseek = seq_lseek, 1107 .proc_release = single_release, 1108 .proc_write = cifs_lookup_cache_proc_write, 1109 }; 1110 1111 static int traceSMB_proc_show(struct seq_file *m, void *v) 1112 { 1113 seq_printf(m, "%d\n", traceSMB); 1114 return 0; 1115 } 1116 1117 static int traceSMB_proc_open(struct inode *inode, struct file *file) 1118 { 1119 return single_open(file, traceSMB_proc_show, NULL); 1120 } 1121 1122 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, 1123 size_t count, loff_t *ppos) 1124 { 1125 int rc; 1126 1127 rc = kstrtobool_from_user(buffer, count, &traceSMB); 1128 if (rc) 1129 return rc; 1130 1131 return count; 1132 } 1133 1134 static const struct proc_ops traceSMB_proc_ops = { 1135 .proc_open = traceSMB_proc_open, 1136 .proc_read = seq_read, 1137 .proc_lseek = seq_lseek, 1138 .proc_release = single_release, 1139 .proc_write = traceSMB_proc_write, 1140 }; 1141 1142 static int cifs_security_flags_proc_show(struct seq_file *m, void *v) 1143 { 1144 seq_printf(m, "0x%x\n", global_secflags); 1145 return 0; 1146 } 1147 1148 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) 1149 { 1150 return single_open(file, cifs_security_flags_proc_show, NULL); 1151 } 1152 1153 /* 1154 * Ensure that if someone sets a MUST flag, that we disable all other MAY 1155 * flags except for the ones corresponding to the given MUST flag. If there are 1156 * multiple MUST flags, then try to prefer more secure ones. 1157 */ 1158 static void 1159 cifs_security_flags_handle_must_flags(unsigned int *flags) 1160 { 1161 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL); 1162 1163 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) 1164 *flags = CIFSSEC_MUST_KRB5; 1165 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) 1166 *flags = CIFSSEC_MUST_NTLMSSP; 1167 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) 1168 *flags = CIFSSEC_MUST_NTLMV2; 1169 1170 *flags |= signflags; 1171 } 1172 1173 static ssize_t cifs_security_flags_proc_write(struct file *file, 1174 const char __user *buffer, size_t count, loff_t *ppos) 1175 { 1176 int rc; 1177 unsigned int flags; 1178 char flags_string[12]; 1179 bool bv; 1180 1181 if ((count < 1) || (count > 11)) 1182 return -EINVAL; 1183 1184 memset(flags_string, 0, sizeof(flags_string)); 1185 1186 if (copy_from_user(flags_string, buffer, count)) 1187 return -EFAULT; 1188 1189 if (count < 3) { 1190 /* single char or single char followed by null */ 1191 if (kstrtobool(flags_string, &bv) == 0) { 1192 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; 1193 return count; 1194 } else if (!isdigit(flags_string[0])) { 1195 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1196 flags_string); 1197 return -EINVAL; 1198 } 1199 } 1200 1201 /* else we have a number */ 1202 rc = kstrtouint(flags_string, 0, &flags); 1203 if (rc) { 1204 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1205 flags_string); 1206 return rc; 1207 } 1208 1209 cifs_dbg(FYI, "sec flags 0x%x\n", flags); 1210 1211 if (flags == 0) { 1212 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); 1213 return -EINVAL; 1214 } 1215 1216 if (flags & ~CIFSSEC_MASK) { 1217 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", 1218 flags & ~CIFSSEC_MASK); 1219 return -EINVAL; 1220 } 1221 1222 cifs_security_flags_handle_must_flags(&flags); 1223 1224 /* flags look ok - update the global security flags for cifs module */ 1225 global_secflags = flags; 1226 if (global_secflags & CIFSSEC_MUST_SIGN) { 1227 /* requiring signing implies signing is allowed */ 1228 global_secflags |= CIFSSEC_MAY_SIGN; 1229 cifs_dbg(FYI, "packet signing now required\n"); 1230 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { 1231 cifs_dbg(FYI, "packet signing disabled\n"); 1232 } 1233 /* BB should we turn on MAY flags for other MUST options? */ 1234 return count; 1235 } 1236 1237 static const struct proc_ops cifs_security_flags_proc_ops = { 1238 .proc_open = cifs_security_flags_proc_open, 1239 .proc_read = seq_read, 1240 .proc_lseek = seq_lseek, 1241 .proc_release = single_release, 1242 .proc_write = cifs_security_flags_proc_write, 1243 }; 1244 1245 /* To make it easier to debug, can help to show mount params */ 1246 static int cifs_mount_params_proc_show(struct seq_file *m, void *v) 1247 { 1248 const struct fs_parameter_spec *p; 1249 const char *type; 1250 1251 for (p = smb3_fs_parameters; p->name; p++) { 1252 /* cannot use switch with pointers... */ 1253 if (!p->type) { 1254 if (p->flags == fs_param_neg_with_no) 1255 type = "noflag"; 1256 else 1257 type = "flag"; 1258 } else if (p->type == fs_param_is_bool) 1259 type = "bool"; 1260 else if (p->type == fs_param_is_u32) 1261 type = "u32"; 1262 else if (p->type == fs_param_is_u64) 1263 type = "u64"; 1264 else if (p->type == fs_param_is_string) 1265 type = "string"; 1266 else 1267 type = "unknown"; 1268 1269 seq_printf(m, "%s:%s\n", p->name, type); 1270 } 1271 1272 return 0; 1273 } 1274 1275 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file) 1276 { 1277 return single_open(file, cifs_mount_params_proc_show, NULL); 1278 } 1279 1280 static const struct proc_ops cifs_mount_params_proc_ops = { 1281 .proc_open = cifs_mount_params_proc_open, 1282 .proc_read = seq_read, 1283 .proc_lseek = seq_lseek, 1284 .proc_release = single_release, 1285 /* No need for write for now */ 1286 /* .proc_write = cifs_mount_params_proc_write, */ 1287 }; 1288 1289 #else 1290 void cifs_proc_init(void) 1291 { 1292 } 1293 1294 void cifs_proc_clean(void) 1295 { 1296 } 1297 #endif /* PROC_FS */ 1298