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, "Features:"); 454 #ifdef CONFIG_CIFS_DFS_UPCALL 455 seq_printf(m, " DFS"); 456 #endif 457 #ifdef CONFIG_CIFS_FSCACHE 458 seq_printf(m, ",FSCACHE"); 459 #endif 460 #ifdef CONFIG_CIFS_SMB_DIRECT 461 seq_printf(m, ",SMB_DIRECT"); 462 #endif 463 #ifdef CONFIG_CIFS_STATS2 464 seq_printf(m, ",STATS2"); 465 #else 466 seq_printf(m, ",STATS"); 467 #endif 468 #ifdef CONFIG_CIFS_DEBUG2 469 seq_printf(m, ",DEBUG2"); 470 #elif defined(CONFIG_CIFS_DEBUG) 471 seq_printf(m, ",DEBUG"); 472 #endif 473 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 474 seq_printf(m, ",ALLOW_INSECURE_LEGACY"); 475 #endif 476 #ifdef CONFIG_CIFS_POSIX 477 seq_printf(m, ",CIFS_POSIX"); 478 #endif 479 #ifdef CONFIG_CIFS_UPCALL 480 seq_printf(m, ",UPCALL(SPNEGO)"); 481 #endif 482 #ifdef CONFIG_CIFS_XATTR 483 seq_printf(m, ",XATTR"); 484 #endif 485 seq_printf(m, ",ACL"); 486 #ifdef CONFIG_CIFS_SWN_UPCALL 487 seq_puts(m, ",WITNESS"); 488 #endif 489 #ifdef CONFIG_CIFS_COMPRESSION 490 seq_puts(m, ",COMPRESSION"); 491 #endif 492 seq_putc(m, '\n'); 493 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize); 494 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); 495 496 seq_printf(m, "\nServers: "); 497 498 c = 0; 499 spin_lock(&cifs_tcp_ses_lock); 500 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 501 /* channel info will be printed as a part of sessions below */ 502 if (SERVER_IS_CHAN(server)) 503 continue; 504 505 c++; 506 seq_printf(m, "\n%d) ConnectionId: 0x%llx ", 507 c, server->conn_id); 508 509 spin_lock(&server->srv_lock); 510 if (server->hostname) 511 seq_printf(m, "Hostname: %s ", server->hostname); 512 seq_printf(m, "\nClientGUID: %pUL", server->client_guid); 513 spin_unlock(&server->srv_lock); 514 #ifdef CONFIG_CIFS_SMB_DIRECT 515 smbd_debug_proc_show(server, m); 516 #endif 517 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x", 518 server->credits, 519 server->echo_credits, 520 server->oplock_credits, 521 server->dialect); 522 if (server->sign) 523 seq_printf(m, " signed"); 524 if (server->posix_ext_supported) 525 seq_printf(m, " posix"); 526 if (server->nosharesock) 527 seq_printf(m, " nosharesock"); 528 529 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities); 530 531 if (server->rdma) 532 seq_printf(m, "\nRDMA "); 533 seq_printf(m, "\nTCP status: %d Instance: %d" 534 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d", 535 server->tcpStatus, 536 server->reconnect_instance, 537 server->srv_count, 538 server->sec_mode, in_flight(server)); 539 #ifdef CONFIG_NET_NS 540 if (server->net) 541 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 542 #endif /* NET_NS */ 543 544 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d", 545 atomic_read(&server->in_send), 546 atomic_read(&server->num_waiters)); 547 548 if (server->leaf_fullpath) { 549 seq_printf(m, "\nDFS leaf full path: %s", 550 server->leaf_fullpath); 551 } 552 553 seq_puts(m, "\nCompression: "); 554 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION)) 555 seq_puts(m, "no built-in support"); 556 else if (!server->compression.requested) 557 seq_puts(m, "disabled on mount"); 558 else if (server->compression.enabled) 559 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg)); 560 else 561 seq_puts(m, "disabled (not supported by this server)"); 562 563 /* Show negotiated encryption cipher, even if not required */ 564 seq_puts(m, "\nEncryption: "); 565 if (server->cipher_type) 566 seq_printf(m, "Negotiated cipher (%s)", cipher_alg_str(server->cipher_type)); 567 568 seq_printf(m, "\n\n\tSessions: "); 569 i = 0; 570 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 571 spin_lock(&ses->ses_lock); 572 if (ses->ses_status == SES_EXITING) { 573 spin_unlock(&ses->ses_lock); 574 continue; 575 } 576 i++; 577 if ((ses->serverDomain == NULL) || 578 (ses->serverOS == NULL) || 579 (ses->serverNOS == NULL)) { 580 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ", 581 i, ses->ip_addr, ses->ses_count, 582 ses->capabilities, ses->ses_status); 583 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 584 seq_printf(m, "Guest "); 585 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 586 seq_printf(m, "Anonymous "); 587 } else { 588 seq_printf(m, 589 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s " 590 "\n\tNOS: %s\tCapability: 0x%x" 591 "\n\tSMB session status: %d ", 592 i, ses->ip_addr, ses->serverDomain, 593 ses->ses_count, ses->serverOS, ses->serverNOS, 594 ses->capabilities, ses->ses_status); 595 } 596 if (ses->expired_pwd) 597 seq_puts(m, "password no longer valid "); 598 spin_unlock(&ses->ses_lock); 599 600 seq_printf(m, "\n\tSecurity type: %s ", 601 get_security_type_str(server->ops->select_sectype(server, ses->sectype))); 602 603 /* dump session id helpful for use with network trace */ 604 seq_printf(m, " SessionId: 0x%llx", ses->Suid); 605 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 606 seq_puts(m, " encrypted"); 607 if (ses->sign) 608 seq_puts(m, " signed"); 609 610 seq_printf(m, "\n\tUser: %d Cred User: %d", 611 from_kuid(&init_user_ns, ses->linux_uid), 612 from_kuid(&init_user_ns, ses->cred_uid)); 613 614 if (ses->dfs_root_ses) { 615 seq_printf(m, "\n\tDFS root session id: 0x%llx", 616 ses->dfs_root_ses->Suid); 617 } 618 619 spin_lock(&ses->chan_lock); 620 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0)) 621 seq_puts(m, "\tPrimary channel: DISCONNECTED "); 622 if (CIFS_CHAN_IN_RECONNECT(ses, 0)) 623 seq_puts(m, "\t[RECONNECTING] "); 624 625 if (ses->chan_count > 1) { 626 seq_printf(m, "\n\n\tExtra Channels: %zu ", 627 ses->chan_count-1); 628 for (j = 1; j < ses->chan_count; j++) { 629 cifs_dump_channel(m, j, &ses->chans[j]); 630 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j)) 631 seq_puts(m, "\tDISCONNECTED "); 632 if (CIFS_CHAN_IN_RECONNECT(ses, j)) 633 seq_puts(m, "\t[RECONNECTING] "); 634 } 635 } 636 spin_unlock(&ses->chan_lock); 637 638 seq_puts(m, "\n\n\tShares: "); 639 j = 0; 640 641 seq_printf(m, "\n\t%d) IPC: ", j); 642 if (ses->tcon_ipc) 643 cifs_debug_tcon(m, ses->tcon_ipc); 644 else 645 seq_puts(m, "none\n"); 646 647 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 648 ++j; 649 seq_printf(m, "\n\t%d) ", j); 650 cifs_debug_tcon(m, tcon); 651 } 652 653 spin_lock(&ses->iface_lock); 654 if (ses->iface_count) 655 seq_printf(m, "\n\n\tServer interfaces: %zu" 656 "\tLast updated: %lu seconds ago", 657 ses->iface_count, 658 (jiffies - ses->iface_last_update) / HZ); 659 660 last_iface = list_last_entry(&ses->iface_list, 661 struct cifs_server_iface, 662 iface_head); 663 iface_min_speed = last_iface->speed; 664 665 j = 0; 666 list_for_each_entry(iface, &ses->iface_list, 667 iface_head) { 668 seq_printf(m, "\n\t%d)", ++j); 669 cifs_dump_iface(m, iface); 670 671 iface_weight = iface->speed / iface_min_speed; 672 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)" 673 "\n\t\tAllocated channels: %u\n", 674 iface->weight_fulfilled, 675 iface_weight, 676 iface->num_channels); 677 678 if (is_ses_using_iface(ses, iface)) 679 seq_puts(m, "\t\t[CONNECTED]\n"); 680 } 681 spin_unlock(&ses->iface_lock); 682 683 seq_puts(m, "\n\n\tMIDs: "); 684 spin_lock(&ses->chan_lock); 685 for (j = 0; j < ses->chan_count; j++) { 686 chan_server = ses->chans[j].server; 687 if (!chan_server) 688 continue; 689 690 if (list_empty(&chan_server->pending_mid_q)) 691 continue; 692 693 seq_printf(m, "\n\tServer ConnectionId: 0x%llx", 694 chan_server->conn_id); 695 spin_lock(&chan_server->mid_queue_lock); 696 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) { 697 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu", 698 mid_entry->mid_state, 699 le16_to_cpu(mid_entry->command), 700 mid_entry->pid, 701 mid_entry->callback_data, 702 mid_entry->mid); 703 } 704 spin_unlock(&chan_server->mid_queue_lock); 705 } 706 spin_unlock(&ses->chan_lock); 707 seq_puts(m, "\n--\n"); 708 } 709 if (i == 0) 710 seq_printf(m, "\n\t\t[NONE]"); 711 } 712 if (c == 0) 713 seq_printf(m, "\n\t[NONE]"); 714 715 spin_unlock(&cifs_tcp_ses_lock); 716 seq_putc(m, '\n'); 717 cifs_swn_dump(m); 718 719 /* BB add code to dump additional info such as TCP session info now */ 720 return 0; 721 } 722 723 static ssize_t cifs_stats_proc_write(struct file *file, 724 const char __user *buffer, size_t count, loff_t *ppos) 725 { 726 bool bv; 727 int rc; 728 struct TCP_Server_Info *server; 729 struct cifs_ses *ses; 730 struct cifs_tcon *tcon; 731 732 rc = kstrtobool_from_user(buffer, count, &bv); 733 if (rc == 0) { 734 #ifdef CONFIG_CIFS_STATS2 735 int i; 736 737 atomic_set(&total_buf_alloc_count, 0); 738 atomic_set(&total_small_buf_alloc_count, 0); 739 #endif /* CONFIG_CIFS_STATS2 */ 740 atomic_set(&tcpSesReconnectCount, 0); 741 atomic_set(&tconInfoReconnectCount, 0); 742 743 spin_lock(&GlobalMid_Lock); 744 GlobalMaxActiveXid = 0; 745 GlobalCurrentXid = 0; 746 spin_unlock(&GlobalMid_Lock); 747 spin_lock(&cifs_tcp_ses_lock); 748 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 749 server->max_in_flight = 0; 750 #ifdef CONFIG_CIFS_STATS2 751 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 752 atomic_set(&server->num_cmds[i], 0); 753 atomic_set(&server->smb2slowcmd[i], 0); 754 server->time_per_cmd[i] = 0; 755 server->slowest_cmd[i] = 0; 756 server->fastest_cmd[i] = 0; 757 } 758 #endif /* CONFIG_CIFS_STATS2 */ 759 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 760 if (cifs_ses_exiting(ses)) 761 continue; 762 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 763 atomic_set(&tcon->num_smbs_sent, 0); 764 spin_lock(&tcon->stat_lock); 765 tcon->bytes_read = 0; 766 tcon->bytes_written = 0; 767 tcon->stats_from_time = ktime_get_real_seconds(); 768 spin_unlock(&tcon->stat_lock); 769 if (server->ops->clear_stats) 770 server->ops->clear_stats(tcon); 771 } 772 } 773 } 774 spin_unlock(&cifs_tcp_ses_lock); 775 } else { 776 return rc; 777 } 778 779 return count; 780 } 781 782 static int cifs_stats_proc_show(struct seq_file *m, void *v) 783 { 784 int i; 785 #ifdef CONFIG_CIFS_STATS2 786 int j; 787 #endif /* STATS2 */ 788 struct TCP_Server_Info *server; 789 struct cifs_ses *ses; 790 struct cifs_tcon *tcon; 791 792 seq_printf(m, "Resources in use\nCIFS Session: %d\n", 793 sesInfoAllocCount.counter); 794 seq_printf(m, "Share (unique mount targets): %d\n", 795 tconInfoAllocCount.counter); 796 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", 797 buf_alloc_count.counter, 798 cifs_min_rcv + tcpSesAllocCount.counter); 799 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", 800 small_buf_alloc_count.counter, cifs_min_small); 801 #ifdef CONFIG_CIFS_STATS2 802 seq_printf(m, "Total Large %d Small %d Allocations\n", 803 atomic_read(&total_buf_alloc_count), 804 atomic_read(&total_small_buf_alloc_count)); 805 #endif /* CONFIG_CIFS_STATS2 */ 806 807 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count)); 808 seq_printf(m, 809 "\n%d session %d share reconnects\n", 810 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); 811 812 seq_printf(m, 813 "Total vfs operations: %d maximum at one time: %d\n", 814 GlobalCurrentXid, GlobalMaxActiveXid); 815 816 i = 0; 817 spin_lock(&cifs_tcp_ses_lock); 818 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 819 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); 820 #ifdef CONFIG_CIFS_STATS2 821 seq_puts(m, "\nTotal time spent processing by command. Time "); 822 seq_printf(m, "units are jiffies (%d per second)\n", HZ); 823 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n"); 824 seq_puts(m, " --------\t------\t----------\t-------\t-------\n"); 825 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 826 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j, 827 atomic_read(&server->num_cmds[j]), 828 server->time_per_cmd[j], 829 server->fastest_cmd[j], 830 server->slowest_cmd[j]); 831 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 832 if (atomic_read(&server->smb2slowcmd[j])) { 833 spin_lock(&server->srv_lock); 834 seq_printf(m, " %d slow responses from %s for command %d\n", 835 atomic_read(&server->smb2slowcmd[j]), 836 server->hostname, j); 837 spin_unlock(&server->srv_lock); 838 } 839 #endif /* STATS2 */ 840 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 841 if (cifs_ses_exiting(ses)) 842 continue; 843 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 844 i++; 845 seq_printf(m, "\n%d) %s", i, tcon->tree_name); 846 if (tcon->need_reconnect) 847 seq_puts(m, "\tDISCONNECTED "); 848 seq_printf(m, "\nSMBs: %d since %ptTs UTC", 849 atomic_read(&tcon->num_smbs_sent), 850 &tcon->stats_from_time); 851 if (server->ops->print_stats) 852 server->ops->print_stats(m, tcon); 853 } 854 } 855 } 856 spin_unlock(&cifs_tcp_ses_lock); 857 858 seq_putc(m, '\n'); 859 return 0; 860 } 861 862 static int cifs_stats_proc_open(struct inode *inode, struct file *file) 863 { 864 return single_open(file, cifs_stats_proc_show, NULL); 865 } 866 867 static const struct proc_ops cifs_stats_proc_ops = { 868 .proc_open = cifs_stats_proc_open, 869 .proc_read = seq_read, 870 .proc_lseek = seq_lseek, 871 .proc_release = single_release, 872 .proc_write = cifs_stats_proc_write, 873 }; 874 875 #ifdef CONFIG_CIFS_SMB_DIRECT 876 #define PROC_FILE_DEFINE(name) \ 877 static ssize_t name##_write(struct file *file, const char __user *buffer, \ 878 size_t count, loff_t *ppos) \ 879 { \ 880 int rc; \ 881 rc = kstrtoint_from_user(buffer, count, 10, &name); \ 882 if (rc) \ 883 return rc; \ 884 return count; \ 885 } \ 886 static int name##_proc_show(struct seq_file *m, void *v) \ 887 { \ 888 seq_printf(m, "%d\n", name); \ 889 return 0; \ 890 } \ 891 static int name##_open(struct inode *inode, struct file *file) \ 892 { \ 893 return single_open(file, name##_proc_show, NULL); \ 894 } \ 895 \ 896 static const struct proc_ops cifs_##name##_proc_fops = { \ 897 .proc_open = name##_open, \ 898 .proc_read = seq_read, \ 899 .proc_lseek = seq_lseek, \ 900 .proc_release = single_release, \ 901 .proc_write = name##_write, \ 902 } 903 904 PROC_FILE_DEFINE(rdma_readwrite_threshold); 905 PROC_FILE_DEFINE(smbd_max_frmr_depth); 906 PROC_FILE_DEFINE(smbd_keep_alive_interval); 907 PROC_FILE_DEFINE(smbd_max_receive_size); 908 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size); 909 PROC_FILE_DEFINE(smbd_max_send_size); 910 PROC_FILE_DEFINE(smbd_send_credit_target); 911 PROC_FILE_DEFINE(smbd_receive_credit_max); 912 #endif 913 914 static struct proc_dir_entry *proc_fs_cifs; 915 static const struct proc_ops cifsFYI_proc_ops; 916 static const struct proc_ops cifs_lookup_cache_proc_ops; 917 static const struct proc_ops traceSMB_proc_ops; 918 static const struct proc_ops cifs_security_flags_proc_ops; 919 static const struct proc_ops cifs_linux_ext_proc_ops; 920 static const struct proc_ops cifs_mount_params_proc_ops; 921 922 void 923 cifs_proc_init(void) 924 { 925 proc_fs_cifs = proc_mkdir("fs/cifs", NULL); 926 if (proc_fs_cifs == NULL) 927 return; 928 929 proc_create_single("DebugData", 0, proc_fs_cifs, 930 cifs_debug_data_proc_show); 931 932 proc_create_single("open_files", 0400, proc_fs_cifs, 933 cifs_debug_files_proc_show); 934 935 #ifdef CONFIG_CIFS_DEBUG 936 proc_create("open_dirs", 0600, proc_fs_cifs, &cifs_debug_dirs_proc_ops); 937 #else /* CONFIG_CIFS_DEBUG */ 938 proc_create_single("open_dirs", 0400, proc_fs_cifs, cifs_debug_dirs_proc_show); 939 #endif /* !CONFIG_CIFS_DEBUG */ 940 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); 941 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); 942 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); 943 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, 944 &cifs_linux_ext_proc_ops); 945 proc_create("SecurityFlags", 0644, proc_fs_cifs, 946 &cifs_security_flags_proc_ops); 947 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, 948 &cifs_lookup_cache_proc_ops); 949 950 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops); 951 952 #ifdef CONFIG_CIFS_DFS_UPCALL 953 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); 954 #endif 955 956 #ifdef CONFIG_CIFS_SMB_DIRECT 957 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs, 958 &cifs_rdma_readwrite_threshold_proc_fops); 959 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs, 960 &cifs_smbd_max_frmr_depth_proc_fops); 961 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs, 962 &cifs_smbd_keep_alive_interval_proc_fops); 963 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs, 964 &cifs_smbd_max_receive_size_proc_fops); 965 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs, 966 &cifs_smbd_max_fragmented_recv_size_proc_fops); 967 proc_create("smbd_max_send_size", 0644, proc_fs_cifs, 968 &cifs_smbd_max_send_size_proc_fops); 969 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs, 970 &cifs_smbd_send_credit_target_proc_fops); 971 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs, 972 &cifs_smbd_receive_credit_max_proc_fops); 973 #endif 974 } 975 976 void 977 cifs_proc_clean(void) 978 { 979 if (proc_fs_cifs == NULL) 980 return; 981 982 remove_proc_entry("DebugData", proc_fs_cifs); 983 remove_proc_entry("open_files", proc_fs_cifs); 984 remove_proc_entry("open_dirs", proc_fs_cifs); 985 remove_proc_entry("cifsFYI", proc_fs_cifs); 986 remove_proc_entry("traceSMB", proc_fs_cifs); 987 remove_proc_entry("Stats", proc_fs_cifs); 988 remove_proc_entry("SecurityFlags", proc_fs_cifs); 989 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); 990 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); 991 remove_proc_entry("mount_params", proc_fs_cifs); 992 993 #ifdef CONFIG_CIFS_DFS_UPCALL 994 remove_proc_entry("dfscache", proc_fs_cifs); 995 #endif 996 #ifdef CONFIG_CIFS_SMB_DIRECT 997 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs); 998 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs); 999 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs); 1000 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs); 1001 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs); 1002 remove_proc_entry("smbd_max_send_size", proc_fs_cifs); 1003 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs); 1004 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs); 1005 #endif 1006 remove_proc_entry("fs/cifs", NULL); 1007 } 1008 1009 static int cifsFYI_proc_show(struct seq_file *m, void *v) 1010 { 1011 seq_printf(m, "%d\n", cifsFYI); 1012 return 0; 1013 } 1014 1015 static int cifsFYI_proc_open(struct inode *inode, struct file *file) 1016 { 1017 return single_open(file, cifsFYI_proc_show, NULL); 1018 } 1019 1020 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, 1021 size_t count, loff_t *ppos) 1022 { 1023 char c[2] = { '\0' }; 1024 bool bv; 1025 int rc; 1026 1027 rc = get_user(c[0], buffer); 1028 if (rc) 1029 return rc; 1030 if (kstrtobool(c, &bv) == 0) 1031 cifsFYI = bv; 1032 else if ((c[0] > '1') && (c[0] <= '9')) 1033 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ 1034 else 1035 return -EINVAL; 1036 1037 return count; 1038 } 1039 1040 static const struct proc_ops cifsFYI_proc_ops = { 1041 .proc_open = cifsFYI_proc_open, 1042 .proc_read = seq_read, 1043 .proc_lseek = seq_lseek, 1044 .proc_release = single_release, 1045 .proc_write = cifsFYI_proc_write, 1046 }; 1047 1048 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) 1049 { 1050 seq_printf(m, "%d\n", linuxExtEnabled); 1051 return 0; 1052 } 1053 1054 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) 1055 { 1056 return single_open(file, cifs_linux_ext_proc_show, NULL); 1057 } 1058 1059 static ssize_t cifs_linux_ext_proc_write(struct file *file, 1060 const char __user *buffer, size_t count, loff_t *ppos) 1061 { 1062 int rc; 1063 1064 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); 1065 if (rc) 1066 return rc; 1067 1068 return count; 1069 } 1070 1071 static const struct proc_ops cifs_linux_ext_proc_ops = { 1072 .proc_open = cifs_linux_ext_proc_open, 1073 .proc_read = seq_read, 1074 .proc_lseek = seq_lseek, 1075 .proc_release = single_release, 1076 .proc_write = cifs_linux_ext_proc_write, 1077 }; 1078 1079 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) 1080 { 1081 seq_printf(m, "%d\n", lookupCacheEnabled); 1082 return 0; 1083 } 1084 1085 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) 1086 { 1087 return single_open(file, cifs_lookup_cache_proc_show, NULL); 1088 } 1089 1090 static ssize_t cifs_lookup_cache_proc_write(struct file *file, 1091 const char __user *buffer, size_t count, loff_t *ppos) 1092 { 1093 int rc; 1094 1095 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); 1096 if (rc) 1097 return rc; 1098 1099 return count; 1100 } 1101 1102 static const struct proc_ops cifs_lookup_cache_proc_ops = { 1103 .proc_open = cifs_lookup_cache_proc_open, 1104 .proc_read = seq_read, 1105 .proc_lseek = seq_lseek, 1106 .proc_release = single_release, 1107 .proc_write = cifs_lookup_cache_proc_write, 1108 }; 1109 1110 static int traceSMB_proc_show(struct seq_file *m, void *v) 1111 { 1112 seq_printf(m, "%d\n", traceSMB); 1113 return 0; 1114 } 1115 1116 static int traceSMB_proc_open(struct inode *inode, struct file *file) 1117 { 1118 return single_open(file, traceSMB_proc_show, NULL); 1119 } 1120 1121 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, 1122 size_t count, loff_t *ppos) 1123 { 1124 int rc; 1125 1126 rc = kstrtobool_from_user(buffer, count, &traceSMB); 1127 if (rc) 1128 return rc; 1129 1130 return count; 1131 } 1132 1133 static const struct proc_ops traceSMB_proc_ops = { 1134 .proc_open = traceSMB_proc_open, 1135 .proc_read = seq_read, 1136 .proc_lseek = seq_lseek, 1137 .proc_release = single_release, 1138 .proc_write = traceSMB_proc_write, 1139 }; 1140 1141 static int cifs_security_flags_proc_show(struct seq_file *m, void *v) 1142 { 1143 seq_printf(m, "0x%x\n", global_secflags); 1144 return 0; 1145 } 1146 1147 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) 1148 { 1149 return single_open(file, cifs_security_flags_proc_show, NULL); 1150 } 1151 1152 /* 1153 * Ensure that if someone sets a MUST flag, that we disable all other MAY 1154 * flags except for the ones corresponding to the given MUST flag. If there are 1155 * multiple MUST flags, then try to prefer more secure ones. 1156 */ 1157 static void 1158 cifs_security_flags_handle_must_flags(unsigned int *flags) 1159 { 1160 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL); 1161 1162 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) 1163 *flags = CIFSSEC_MUST_KRB5; 1164 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) 1165 *flags = CIFSSEC_MUST_NTLMSSP; 1166 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) 1167 *flags = CIFSSEC_MUST_NTLMV2; 1168 1169 *flags |= signflags; 1170 } 1171 1172 static ssize_t cifs_security_flags_proc_write(struct file *file, 1173 const char __user *buffer, size_t count, loff_t *ppos) 1174 { 1175 int rc; 1176 unsigned int flags; 1177 char flags_string[12]; 1178 bool bv; 1179 1180 if ((count < 1) || (count > 11)) 1181 return -EINVAL; 1182 1183 memset(flags_string, 0, sizeof(flags_string)); 1184 1185 if (copy_from_user(flags_string, buffer, count)) 1186 return -EFAULT; 1187 1188 if (count < 3) { 1189 /* single char or single char followed by null */ 1190 if (kstrtobool(flags_string, &bv) == 0) { 1191 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; 1192 return count; 1193 } else if (!isdigit(flags_string[0])) { 1194 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1195 flags_string); 1196 return -EINVAL; 1197 } 1198 } 1199 1200 /* else we have a number */ 1201 rc = kstrtouint(flags_string, 0, &flags); 1202 if (rc) { 1203 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1204 flags_string); 1205 return rc; 1206 } 1207 1208 cifs_dbg(FYI, "sec flags 0x%x\n", flags); 1209 1210 if (flags == 0) { 1211 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); 1212 return -EINVAL; 1213 } 1214 1215 if (flags & ~CIFSSEC_MASK) { 1216 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", 1217 flags & ~CIFSSEC_MASK); 1218 return -EINVAL; 1219 } 1220 1221 cifs_security_flags_handle_must_flags(&flags); 1222 1223 /* flags look ok - update the global security flags for cifs module */ 1224 global_secflags = flags; 1225 if (global_secflags & CIFSSEC_MUST_SIGN) { 1226 /* requiring signing implies signing is allowed */ 1227 global_secflags |= CIFSSEC_MAY_SIGN; 1228 cifs_dbg(FYI, "packet signing now required\n"); 1229 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { 1230 cifs_dbg(FYI, "packet signing disabled\n"); 1231 } 1232 /* BB should we turn on MAY flags for other MUST options? */ 1233 return count; 1234 } 1235 1236 static const struct proc_ops cifs_security_flags_proc_ops = { 1237 .proc_open = cifs_security_flags_proc_open, 1238 .proc_read = seq_read, 1239 .proc_lseek = seq_lseek, 1240 .proc_release = single_release, 1241 .proc_write = cifs_security_flags_proc_write, 1242 }; 1243 1244 /* To make it easier to debug, can help to show mount params */ 1245 static int cifs_mount_params_proc_show(struct seq_file *m, void *v) 1246 { 1247 const struct fs_parameter_spec *p; 1248 const char *type; 1249 1250 for (p = smb3_fs_parameters; p->name; p++) { 1251 /* cannot use switch with pointers... */ 1252 if (!p->type) { 1253 if (p->flags == fs_param_neg_with_no) 1254 type = "noflag"; 1255 else 1256 type = "flag"; 1257 } else if (p->type == fs_param_is_bool) 1258 type = "bool"; 1259 else if (p->type == fs_param_is_u32) 1260 type = "u32"; 1261 else if (p->type == fs_param_is_u64) 1262 type = "u64"; 1263 else if (p->type == fs_param_is_string) 1264 type = "string"; 1265 else 1266 type = "unknown"; 1267 1268 seq_printf(m, "%s:%s\n", p->name, type); 1269 } 1270 1271 return 0; 1272 } 1273 1274 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file) 1275 { 1276 return single_open(file, cifs_mount_params_proc_show, NULL); 1277 } 1278 1279 static const struct proc_ops cifs_mount_params_proc_ops = { 1280 .proc_open = cifs_mount_params_proc_open, 1281 .proc_read = seq_read, 1282 .proc_lseek = seq_lseek, 1283 .proc_release = single_release, 1284 /* No need for write for now */ 1285 /* .proc_write = cifs_mount_params_proc_write, */ 1286 }; 1287 1288 #else 1289 void cifs_proc_init(void) 1290 { 1291 } 1292 1293 void cifs_proc_clean(void) 1294 { 1295 } 1296 #endif /* PROC_FS */ 1297