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 "cifspdu.h" 17 #include "cifsglob.h" 18 #include "cifsproto.h" 19 #include "cifs_debug.h" 20 #include "cifsfs.h" 21 #include "fs_context.h" 22 #ifdef CONFIG_CIFS_DFS_UPCALL 23 #include "dfs_cache.h" 24 #endif 25 #ifdef CONFIG_CIFS_SMB_DIRECT 26 #include "smbdirect.h" 27 #endif 28 #include "cifs_swn.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_detail(void *buf, struct TCP_Server_Info *server) 39 { 40 #ifdef CONFIG_CIFS_DEBUG2 41 struct smb_hdr *smb = buf; 42 43 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n", 44 smb->Command, smb->Status.CifsError, smb->Flags, 45 smb->Flags2, smb->Mid, smb->Pid, smb->WordCount); 46 if (!server->ops->check_message(buf, server->total_read, server)) { 47 cifs_dbg(VFS, "smb buf %p len %u\n", smb, 48 server->ops->calc_smb_size(smb)); 49 } 50 #endif /* CONFIG_CIFS_DEBUG2 */ 51 } 52 53 void cifs_dump_mids(struct TCP_Server_Info *server) 54 { 55 #ifdef CONFIG_CIFS_DEBUG2 56 struct mid_q_entry *mid_entry; 57 58 if (server == NULL) 59 return; 60 61 cifs_dbg(VFS, "Dump pending requests:\n"); 62 spin_lock(&server->mid_lock); 63 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { 64 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n", 65 mid_entry->mid_state, 66 le16_to_cpu(mid_entry->command), 67 mid_entry->pid, 68 mid_entry->callback_data, 69 mid_entry->mid); 70 #ifdef CONFIG_CIFS_STATS2 71 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n", 72 mid_entry->large_buf, 73 mid_entry->resp_buf, 74 mid_entry->when_received, 75 jiffies); 76 #endif /* STATS2 */ 77 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n", 78 mid_entry->multiRsp, mid_entry->multiEnd); 79 if (mid_entry->resp_buf) { 80 cifs_dump_detail(mid_entry->resp_buf, server); 81 cifs_dump_mem("existing buf: ", 82 mid_entry->resp_buf, 62); 83 } 84 } 85 spin_unlock(&server->mid_lock); 86 #endif /* CONFIG_CIFS_DEBUG2 */ 87 } 88 89 #ifdef CONFIG_PROC_FS 90 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon) 91 { 92 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); 93 94 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count); 95 if (tcon->nativeFileSystem) 96 seq_printf(m, "Type: %s ", tcon->nativeFileSystem); 97 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d", 98 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), 99 le32_to_cpu(tcon->fsAttrInfo.Attributes), 100 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), 101 tcon->status); 102 if (dev_type == FILE_DEVICE_DISK) 103 seq_puts(m, " type: DISK "); 104 else if (dev_type == FILE_DEVICE_CD_ROM) 105 seq_puts(m, " type: CDROM "); 106 else 107 seq_printf(m, " type: %d ", dev_type); 108 109 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number); 110 111 if ((tcon->seal) || 112 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || 113 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) 114 seq_puts(m, " encrypted"); 115 if (tcon->nocase) 116 seq_printf(m, " nocase"); 117 if (tcon->unix_ext) 118 seq_printf(m, " POSIX Extensions"); 119 if (tcon->ses->server->ops->dump_share_caps) 120 tcon->ses->server->ops->dump_share_caps(m, tcon); 121 if (tcon->use_witness) 122 seq_puts(m, " Witness"); 123 if (tcon->broken_sparse_sup) 124 seq_puts(m, " nosparse"); 125 if (tcon->need_reconnect) 126 seq_puts(m, "\tDISCONNECTED "); 127 spin_lock(&tcon->tc_lock); 128 if (tcon->origin_fullpath) { 129 seq_printf(m, "\n\tDFS origin fullpath: %s", 130 tcon->origin_fullpath); 131 } 132 spin_unlock(&tcon->tc_lock); 133 seq_putc(m, '\n'); 134 } 135 136 static void 137 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) 138 { 139 struct TCP_Server_Info *server = chan->server; 140 141 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx" 142 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x" 143 "\n\t\tTCP status: %d Instance: %d" 144 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d" 145 "\n\t\tIn Send: %d In MaxReq Wait: %d", 146 i+1, server->conn_id, 147 server->credits, 148 server->echo_credits, 149 server->oplock_credits, 150 server->dialect, 151 server->tcpStatus, 152 server->reconnect_instance, 153 server->srv_count, 154 server->sec_mode, 155 in_flight(server), 156 atomic_read(&server->in_send), 157 atomic_read(&server->num_waiters)); 158 #ifdef CONFIG_NET_NS 159 if (server->net) 160 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 161 #endif /* NET_NS */ 162 163 } 164 165 static inline const char *smb_speed_to_str(size_t bps) 166 { 167 size_t mbps = bps / 1000 / 1000; 168 169 switch (mbps) { 170 case SPEED_10: 171 return "10Mbps"; 172 case SPEED_100: 173 return "100Mbps"; 174 case SPEED_1000: 175 return "1Gbps"; 176 case SPEED_2500: 177 return "2.5Gbps"; 178 case SPEED_5000: 179 return "5Gbps"; 180 case SPEED_10000: 181 return "10Gbps"; 182 case SPEED_14000: 183 return "14Gbps"; 184 case SPEED_20000: 185 return "20Gbps"; 186 case SPEED_25000: 187 return "25Gbps"; 188 case SPEED_40000: 189 return "40Gbps"; 190 case SPEED_50000: 191 return "50Gbps"; 192 case SPEED_56000: 193 return "56Gbps"; 194 case SPEED_100000: 195 return "100Gbps"; 196 case SPEED_200000: 197 return "200Gbps"; 198 case SPEED_400000: 199 return "400Gbps"; 200 case SPEED_800000: 201 return "800Gbps"; 202 default: 203 return "Unknown"; 204 } 205 } 206 207 static void 208 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface) 209 { 210 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; 211 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; 212 213 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed)); 214 seq_puts(m, "\t\tCapabilities: "); 215 if (iface->rdma_capable) 216 seq_puts(m, "rdma "); 217 if (iface->rss_capable) 218 seq_puts(m, "rss "); 219 if (!iface->rdma_capable && !iface->rss_capable) 220 seq_puts(m, "None"); 221 seq_putc(m, '\n'); 222 if (iface->sockaddr.ss_family == AF_INET) 223 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr); 224 else if (iface->sockaddr.ss_family == AF_INET6) 225 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr); 226 if (!iface->is_active) 227 seq_puts(m, "\t\t[for-cleanup]\n"); 228 } 229 230 static int cifs_debug_files_proc_show(struct seq_file *m, void *v) 231 { 232 struct TCP_Server_Info *server; 233 struct cifs_ses *ses; 234 struct cifs_tcon *tcon; 235 struct cifsFileInfo *cfile; 236 237 seq_puts(m, "# Version:1\n"); 238 seq_puts(m, "# Format:\n"); 239 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>"); 240 #ifdef CONFIG_CIFS_DEBUG2 241 seq_printf(m, " <filename> <mid>\n"); 242 #else 243 seq_printf(m, " <filename>\n"); 244 #endif /* CIFS_DEBUG2 */ 245 spin_lock(&cifs_tcp_ses_lock); 246 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 247 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 248 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 249 spin_lock(&tcon->open_file_lock); 250 list_for_each_entry(cfile, &tcon->openFileList, tlist) { 251 seq_printf(m, 252 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd", 253 tcon->tid, 254 ses->Suid, 255 cfile->fid.persistent_fid, 256 cfile->f_flags, 257 cfile->count, 258 cfile->pid, 259 from_kuid(&init_user_ns, cfile->uid), 260 cfile->dentry); 261 #ifdef CONFIG_CIFS_DEBUG2 262 seq_printf(m, " %llu\n", cfile->fid.mid); 263 #else 264 seq_printf(m, "\n"); 265 #endif /* CIFS_DEBUG2 */ 266 } 267 spin_unlock(&tcon->open_file_lock); 268 } 269 } 270 } 271 spin_unlock(&cifs_tcp_ses_lock); 272 seq_putc(m, '\n'); 273 return 0; 274 } 275 276 static int cifs_debug_data_proc_show(struct seq_file *m, void *v) 277 { 278 struct mid_q_entry *mid_entry; 279 struct TCP_Server_Info *server; 280 struct TCP_Server_Info *chan_server; 281 struct cifs_ses *ses; 282 struct cifs_tcon *tcon; 283 struct cifs_server_iface *iface; 284 size_t iface_weight = 0, iface_min_speed = 0; 285 struct cifs_server_iface *last_iface = NULL; 286 int c, i, j; 287 288 seq_puts(m, 289 "Display Internal CIFS Data Structures for Debugging\n" 290 "---------------------------------------------------\n"); 291 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); 292 seq_printf(m, "Features:"); 293 #ifdef CONFIG_CIFS_DFS_UPCALL 294 seq_printf(m, " DFS"); 295 #endif 296 #ifdef CONFIG_CIFS_FSCACHE 297 seq_printf(m, ",FSCACHE"); 298 #endif 299 #ifdef CONFIG_CIFS_SMB_DIRECT 300 seq_printf(m, ",SMB_DIRECT"); 301 #endif 302 #ifdef CONFIG_CIFS_STATS2 303 seq_printf(m, ",STATS2"); 304 #else 305 seq_printf(m, ",STATS"); 306 #endif 307 #ifdef CONFIG_CIFS_DEBUG2 308 seq_printf(m, ",DEBUG2"); 309 #elif defined(CONFIG_CIFS_DEBUG) 310 seq_printf(m, ",DEBUG"); 311 #endif 312 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 313 seq_printf(m, ",ALLOW_INSECURE_LEGACY"); 314 #endif 315 #ifdef CONFIG_CIFS_POSIX 316 seq_printf(m, ",CIFS_POSIX"); 317 #endif 318 #ifdef CONFIG_CIFS_UPCALL 319 seq_printf(m, ",UPCALL(SPNEGO)"); 320 #endif 321 #ifdef CONFIG_CIFS_XATTR 322 seq_printf(m, ",XATTR"); 323 #endif 324 seq_printf(m, ",ACL"); 325 #ifdef CONFIG_CIFS_SWN_UPCALL 326 seq_puts(m, ",WITNESS"); 327 #endif 328 seq_putc(m, '\n'); 329 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize); 330 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); 331 332 seq_printf(m, "\nServers: "); 333 334 c = 0; 335 spin_lock(&cifs_tcp_ses_lock); 336 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 337 /* channel info will be printed as a part of sessions below */ 338 if (SERVER_IS_CHAN(server)) 339 continue; 340 341 c++; 342 seq_printf(m, "\n%d) ConnectionId: 0x%llx ", 343 c, server->conn_id); 344 345 spin_lock(&server->srv_lock); 346 if (server->hostname) 347 seq_printf(m, "Hostname: %s ", server->hostname); 348 seq_printf(m, "\nClientGUID: %pUL", server->client_guid); 349 spin_unlock(&server->srv_lock); 350 #ifdef CONFIG_CIFS_SMB_DIRECT 351 if (!server->rdma) 352 goto skip_rdma; 353 354 if (!server->smbd_conn) { 355 seq_printf(m, "\nSMBDirect transport not available"); 356 goto skip_rdma; 357 } 358 359 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x " 360 "transport status: %x", 361 server->smbd_conn->protocol, 362 server->smbd_conn->transport_status); 363 seq_printf(m, "\nConn receive_credit_max: %x " 364 "send_credit_target: %x max_send_size: %x", 365 server->smbd_conn->receive_credit_max, 366 server->smbd_conn->send_credit_target, 367 server->smbd_conn->max_send_size); 368 seq_printf(m, "\nConn max_fragmented_recv_size: %x " 369 "max_fragmented_send_size: %x max_receive_size:%x", 370 server->smbd_conn->max_fragmented_recv_size, 371 server->smbd_conn->max_fragmented_send_size, 372 server->smbd_conn->max_receive_size); 373 seq_printf(m, "\nConn keep_alive_interval: %x " 374 "max_readwrite_size: %x rdma_readwrite_threshold: %x", 375 server->smbd_conn->keep_alive_interval, 376 server->smbd_conn->max_readwrite_size, 377 server->smbd_conn->rdma_readwrite_threshold); 378 seq_printf(m, "\nDebug count_get_receive_buffer: %x " 379 "count_put_receive_buffer: %x count_send_empty: %x", 380 server->smbd_conn->count_get_receive_buffer, 381 server->smbd_conn->count_put_receive_buffer, 382 server->smbd_conn->count_send_empty); 383 seq_printf(m, "\nRead Queue count_reassembly_queue: %x " 384 "count_enqueue_reassembly_queue: %x " 385 "count_dequeue_reassembly_queue: %x " 386 "fragment_reassembly_remaining: %x " 387 "reassembly_data_length: %x " 388 "reassembly_queue_length: %x", 389 server->smbd_conn->count_reassembly_queue, 390 server->smbd_conn->count_enqueue_reassembly_queue, 391 server->smbd_conn->count_dequeue_reassembly_queue, 392 server->smbd_conn->fragment_reassembly_remaining, 393 server->smbd_conn->reassembly_data_length, 394 server->smbd_conn->reassembly_queue_length); 395 seq_printf(m, "\nCurrent Credits send_credits: %x " 396 "receive_credits: %x receive_credit_target: %x", 397 atomic_read(&server->smbd_conn->send_credits), 398 atomic_read(&server->smbd_conn->receive_credits), 399 server->smbd_conn->receive_credit_target); 400 seq_printf(m, "\nPending send_pending: %x ", 401 atomic_read(&server->smbd_conn->send_pending)); 402 seq_printf(m, "\nReceive buffers count_receive_queue: %x " 403 "count_empty_packet_queue: %x", 404 server->smbd_conn->count_receive_queue, 405 server->smbd_conn->count_empty_packet_queue); 406 seq_printf(m, "\nMR responder_resources: %x " 407 "max_frmr_depth: %x mr_type: %x", 408 server->smbd_conn->responder_resources, 409 server->smbd_conn->max_frmr_depth, 410 server->smbd_conn->mr_type); 411 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x", 412 atomic_read(&server->smbd_conn->mr_ready_count), 413 atomic_read(&server->smbd_conn->mr_used_count)); 414 skip_rdma: 415 #endif 416 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x", 417 server->credits, 418 server->echo_credits, 419 server->oplock_credits, 420 server->dialect); 421 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1) 422 seq_printf(m, " COMPRESS_LZNT1"); 423 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77) 424 seq_printf(m, " COMPRESS_LZ77"); 425 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF) 426 seq_printf(m, " COMPRESS_LZ77_HUFF"); 427 if (server->sign) 428 seq_printf(m, " signed"); 429 if (server->posix_ext_supported) 430 seq_printf(m, " posix"); 431 if (server->nosharesock) 432 seq_printf(m, " nosharesock"); 433 434 if (server->rdma) 435 seq_printf(m, "\nRDMA "); 436 seq_printf(m, "\nTCP status: %d Instance: %d" 437 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d", 438 server->tcpStatus, 439 server->reconnect_instance, 440 server->srv_count, 441 server->sec_mode, in_flight(server)); 442 #ifdef CONFIG_NET_NS 443 if (server->net) 444 seq_printf(m, " Net namespace: %u ", server->net->ns.inum); 445 #endif /* NET_NS */ 446 447 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d", 448 atomic_read(&server->in_send), 449 atomic_read(&server->num_waiters)); 450 451 if (server->leaf_fullpath) { 452 seq_printf(m, "\nDFS leaf full path: %s", 453 server->leaf_fullpath); 454 } 455 456 seq_printf(m, "\n\n\tSessions: "); 457 i = 0; 458 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 459 spin_lock(&ses->ses_lock); 460 if (ses->ses_status == SES_EXITING) { 461 spin_unlock(&ses->ses_lock); 462 continue; 463 } 464 i++; 465 if ((ses->serverDomain == NULL) || 466 (ses->serverOS == NULL) || 467 (ses->serverNOS == NULL)) { 468 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ", 469 i, ses->ip_addr, ses->ses_count, 470 ses->capabilities, ses->ses_status); 471 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 472 seq_printf(m, "Guest "); 473 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 474 seq_printf(m, "Anonymous "); 475 } else { 476 seq_printf(m, 477 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s " 478 "\n\tNOS: %s\tCapability: 0x%x" 479 "\n\tSMB session status: %d ", 480 i, ses->ip_addr, ses->serverDomain, 481 ses->ses_count, ses->serverOS, ses->serverNOS, 482 ses->capabilities, ses->ses_status); 483 } 484 spin_unlock(&ses->ses_lock); 485 486 seq_printf(m, "\n\tSecurity type: %s ", 487 get_security_type_str(server->ops->select_sectype(server, ses->sectype))); 488 489 /* dump session id helpful for use with network trace */ 490 seq_printf(m, " SessionId: 0x%llx", ses->Suid); 491 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) { 492 seq_puts(m, " encrypted"); 493 /* can help in debugging to show encryption type */ 494 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM) 495 seq_puts(m, "(gcm256)"); 496 } 497 if (ses->sign) 498 seq_puts(m, " signed"); 499 500 seq_printf(m, "\n\tUser: %d Cred User: %d", 501 from_kuid(&init_user_ns, ses->linux_uid), 502 from_kuid(&init_user_ns, ses->cred_uid)); 503 504 if (ses->dfs_root_ses) { 505 seq_printf(m, "\n\tDFS root session id: 0x%llx", 506 ses->dfs_root_ses->Suid); 507 } 508 509 spin_lock(&ses->chan_lock); 510 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0)) 511 seq_puts(m, "\tPrimary channel: DISCONNECTED "); 512 if (CIFS_CHAN_IN_RECONNECT(ses, 0)) 513 seq_puts(m, "\t[RECONNECTING] "); 514 515 if (ses->chan_count > 1) { 516 seq_printf(m, "\n\n\tExtra Channels: %zu ", 517 ses->chan_count-1); 518 for (j = 1; j < ses->chan_count; j++) { 519 cifs_dump_channel(m, j, &ses->chans[j]); 520 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j)) 521 seq_puts(m, "\tDISCONNECTED "); 522 if (CIFS_CHAN_IN_RECONNECT(ses, j)) 523 seq_puts(m, "\t[RECONNECTING] "); 524 } 525 } 526 spin_unlock(&ses->chan_lock); 527 528 seq_puts(m, "\n\n\tShares: "); 529 j = 0; 530 531 seq_printf(m, "\n\t%d) IPC: ", j); 532 if (ses->tcon_ipc) 533 cifs_debug_tcon(m, ses->tcon_ipc); 534 else 535 seq_puts(m, "none\n"); 536 537 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 538 ++j; 539 seq_printf(m, "\n\t%d) ", j); 540 cifs_debug_tcon(m, tcon); 541 } 542 543 spin_lock(&ses->iface_lock); 544 if (ses->iface_count) 545 seq_printf(m, "\n\n\tServer interfaces: %zu" 546 "\tLast updated: %lu seconds ago", 547 ses->iface_count, 548 (jiffies - ses->iface_last_update) / HZ); 549 550 last_iface = list_last_entry(&ses->iface_list, 551 struct cifs_server_iface, 552 iface_head); 553 iface_min_speed = last_iface->speed; 554 555 j = 0; 556 list_for_each_entry(iface, &ses->iface_list, 557 iface_head) { 558 seq_printf(m, "\n\t%d)", ++j); 559 cifs_dump_iface(m, iface); 560 561 iface_weight = iface->speed / iface_min_speed; 562 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)" 563 "\n\t\tAllocated channels: %u\n", 564 iface->weight_fulfilled, 565 iface_weight, 566 iface->num_channels); 567 568 if (is_ses_using_iface(ses, iface)) 569 seq_puts(m, "\t\t[CONNECTED]\n"); 570 } 571 spin_unlock(&ses->iface_lock); 572 573 seq_puts(m, "\n\n\tMIDs: "); 574 spin_lock(&ses->chan_lock); 575 for (j = 0; j < ses->chan_count; j++) { 576 chan_server = ses->chans[j].server; 577 if (!chan_server) 578 continue; 579 580 if (list_empty(&chan_server->pending_mid_q)) 581 continue; 582 583 seq_printf(m, "\n\tServer ConnectionId: 0x%llx", 584 chan_server->conn_id); 585 spin_lock(&chan_server->mid_lock); 586 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) { 587 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu", 588 mid_entry->mid_state, 589 le16_to_cpu(mid_entry->command), 590 mid_entry->pid, 591 mid_entry->callback_data, 592 mid_entry->mid); 593 } 594 spin_unlock(&chan_server->mid_lock); 595 } 596 spin_unlock(&ses->chan_lock); 597 seq_puts(m, "\n--\n"); 598 } 599 if (i == 0) 600 seq_printf(m, "\n\t\t[NONE]"); 601 } 602 if (c == 0) 603 seq_printf(m, "\n\t[NONE]"); 604 605 spin_unlock(&cifs_tcp_ses_lock); 606 seq_putc(m, '\n'); 607 cifs_swn_dump(m); 608 609 /* BB add code to dump additional info such as TCP session info now */ 610 return 0; 611 } 612 613 static ssize_t cifs_stats_proc_write(struct file *file, 614 const char __user *buffer, size_t count, loff_t *ppos) 615 { 616 bool bv; 617 int rc; 618 struct TCP_Server_Info *server; 619 struct cifs_ses *ses; 620 struct cifs_tcon *tcon; 621 622 rc = kstrtobool_from_user(buffer, count, &bv); 623 if (rc == 0) { 624 #ifdef CONFIG_CIFS_STATS2 625 int i; 626 627 atomic_set(&total_buf_alloc_count, 0); 628 atomic_set(&total_small_buf_alloc_count, 0); 629 #endif /* CONFIG_CIFS_STATS2 */ 630 atomic_set(&tcpSesReconnectCount, 0); 631 atomic_set(&tconInfoReconnectCount, 0); 632 633 spin_lock(&GlobalMid_Lock); 634 GlobalMaxActiveXid = 0; 635 GlobalCurrentXid = 0; 636 spin_unlock(&GlobalMid_Lock); 637 spin_lock(&cifs_tcp_ses_lock); 638 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 639 server->max_in_flight = 0; 640 #ifdef CONFIG_CIFS_STATS2 641 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 642 atomic_set(&server->num_cmds[i], 0); 643 atomic_set(&server->smb2slowcmd[i], 0); 644 server->time_per_cmd[i] = 0; 645 server->slowest_cmd[i] = 0; 646 server->fastest_cmd[0] = 0; 647 } 648 #endif /* CONFIG_CIFS_STATS2 */ 649 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 650 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 651 atomic_set(&tcon->num_smbs_sent, 0); 652 spin_lock(&tcon->stat_lock); 653 tcon->bytes_read = 0; 654 tcon->bytes_written = 0; 655 spin_unlock(&tcon->stat_lock); 656 if (server->ops->clear_stats) 657 server->ops->clear_stats(tcon); 658 } 659 } 660 } 661 spin_unlock(&cifs_tcp_ses_lock); 662 } else { 663 return rc; 664 } 665 666 return count; 667 } 668 669 static int cifs_stats_proc_show(struct seq_file *m, void *v) 670 { 671 int i; 672 #ifdef CONFIG_CIFS_STATS2 673 int j; 674 #endif /* STATS2 */ 675 struct TCP_Server_Info *server; 676 struct cifs_ses *ses; 677 struct cifs_tcon *tcon; 678 679 seq_printf(m, "Resources in use\nCIFS Session: %d\n", 680 sesInfoAllocCount.counter); 681 seq_printf(m, "Share (unique mount targets): %d\n", 682 tconInfoAllocCount.counter); 683 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", 684 buf_alloc_count.counter, 685 cifs_min_rcv + tcpSesAllocCount.counter); 686 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", 687 small_buf_alloc_count.counter, cifs_min_small); 688 #ifdef CONFIG_CIFS_STATS2 689 seq_printf(m, "Total Large %d Small %d Allocations\n", 690 atomic_read(&total_buf_alloc_count), 691 atomic_read(&total_small_buf_alloc_count)); 692 #endif /* CONFIG_CIFS_STATS2 */ 693 694 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count)); 695 seq_printf(m, 696 "\n%d session %d share reconnects\n", 697 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); 698 699 seq_printf(m, 700 "Total vfs operations: %d maximum at one time: %d\n", 701 GlobalCurrentXid, GlobalMaxActiveXid); 702 703 i = 0; 704 spin_lock(&cifs_tcp_ses_lock); 705 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { 706 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); 707 #ifdef CONFIG_CIFS_STATS2 708 seq_puts(m, "\nTotal time spent processing by command. Time "); 709 seq_printf(m, "units are jiffies (%d per second)\n", HZ); 710 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n"); 711 seq_puts(m, " --------\t------\t----------\t-------\t-------\n"); 712 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 713 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j, 714 atomic_read(&server->num_cmds[j]), 715 server->time_per_cmd[j], 716 server->fastest_cmd[j], 717 server->slowest_cmd[j]); 718 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 719 if (atomic_read(&server->smb2slowcmd[j])) { 720 spin_lock(&server->srv_lock); 721 seq_printf(m, " %d slow responses from %s for command %d\n", 722 atomic_read(&server->smb2slowcmd[j]), 723 server->hostname, j); 724 spin_unlock(&server->srv_lock); 725 } 726 #endif /* STATS2 */ 727 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { 728 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 729 i++; 730 seq_printf(m, "\n%d) %s", i, tcon->tree_name); 731 if (tcon->need_reconnect) 732 seq_puts(m, "\tDISCONNECTED "); 733 seq_printf(m, "\nSMBs: %d", 734 atomic_read(&tcon->num_smbs_sent)); 735 if (server->ops->print_stats) 736 server->ops->print_stats(m, tcon); 737 } 738 } 739 } 740 spin_unlock(&cifs_tcp_ses_lock); 741 742 seq_putc(m, '\n'); 743 return 0; 744 } 745 746 static int cifs_stats_proc_open(struct inode *inode, struct file *file) 747 { 748 return single_open(file, cifs_stats_proc_show, NULL); 749 } 750 751 static const struct proc_ops cifs_stats_proc_ops = { 752 .proc_open = cifs_stats_proc_open, 753 .proc_read = seq_read, 754 .proc_lseek = seq_lseek, 755 .proc_release = single_release, 756 .proc_write = cifs_stats_proc_write, 757 }; 758 759 #ifdef CONFIG_CIFS_SMB_DIRECT 760 #define PROC_FILE_DEFINE(name) \ 761 static ssize_t name##_write(struct file *file, const char __user *buffer, \ 762 size_t count, loff_t *ppos) \ 763 { \ 764 int rc; \ 765 rc = kstrtoint_from_user(buffer, count, 10, & name); \ 766 if (rc) \ 767 return rc; \ 768 return count; \ 769 } \ 770 static int name##_proc_show(struct seq_file *m, void *v) \ 771 { \ 772 seq_printf(m, "%d\n", name ); \ 773 return 0; \ 774 } \ 775 static int name##_open(struct inode *inode, struct file *file) \ 776 { \ 777 return single_open(file, name##_proc_show, NULL); \ 778 } \ 779 \ 780 static const struct proc_ops cifs_##name##_proc_fops = { \ 781 .proc_open = name##_open, \ 782 .proc_read = seq_read, \ 783 .proc_lseek = seq_lseek, \ 784 .proc_release = single_release, \ 785 .proc_write = name##_write, \ 786 } 787 788 PROC_FILE_DEFINE(rdma_readwrite_threshold); 789 PROC_FILE_DEFINE(smbd_max_frmr_depth); 790 PROC_FILE_DEFINE(smbd_keep_alive_interval); 791 PROC_FILE_DEFINE(smbd_max_receive_size); 792 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size); 793 PROC_FILE_DEFINE(smbd_max_send_size); 794 PROC_FILE_DEFINE(smbd_send_credit_target); 795 PROC_FILE_DEFINE(smbd_receive_credit_max); 796 #endif 797 798 static struct proc_dir_entry *proc_fs_cifs; 799 static const struct proc_ops cifsFYI_proc_ops; 800 static const struct proc_ops cifs_lookup_cache_proc_ops; 801 static const struct proc_ops traceSMB_proc_ops; 802 static const struct proc_ops cifs_security_flags_proc_ops; 803 static const struct proc_ops cifs_linux_ext_proc_ops; 804 static const struct proc_ops cifs_mount_params_proc_ops; 805 806 void 807 cifs_proc_init(void) 808 { 809 proc_fs_cifs = proc_mkdir("fs/cifs", NULL); 810 if (proc_fs_cifs == NULL) 811 return; 812 813 proc_create_single("DebugData", 0, proc_fs_cifs, 814 cifs_debug_data_proc_show); 815 816 proc_create_single("open_files", 0400, proc_fs_cifs, 817 cifs_debug_files_proc_show); 818 819 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); 820 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); 821 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); 822 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, 823 &cifs_linux_ext_proc_ops); 824 proc_create("SecurityFlags", 0644, proc_fs_cifs, 825 &cifs_security_flags_proc_ops); 826 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, 827 &cifs_lookup_cache_proc_ops); 828 829 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops); 830 831 #ifdef CONFIG_CIFS_DFS_UPCALL 832 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); 833 #endif 834 835 #ifdef CONFIG_CIFS_SMB_DIRECT 836 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs, 837 &cifs_rdma_readwrite_threshold_proc_fops); 838 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs, 839 &cifs_smbd_max_frmr_depth_proc_fops); 840 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs, 841 &cifs_smbd_keep_alive_interval_proc_fops); 842 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs, 843 &cifs_smbd_max_receive_size_proc_fops); 844 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs, 845 &cifs_smbd_max_fragmented_recv_size_proc_fops); 846 proc_create("smbd_max_send_size", 0644, proc_fs_cifs, 847 &cifs_smbd_max_send_size_proc_fops); 848 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs, 849 &cifs_smbd_send_credit_target_proc_fops); 850 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs, 851 &cifs_smbd_receive_credit_max_proc_fops); 852 #endif 853 } 854 855 void 856 cifs_proc_clean(void) 857 { 858 if (proc_fs_cifs == NULL) 859 return; 860 861 remove_proc_entry("DebugData", proc_fs_cifs); 862 remove_proc_entry("open_files", proc_fs_cifs); 863 remove_proc_entry("cifsFYI", proc_fs_cifs); 864 remove_proc_entry("traceSMB", proc_fs_cifs); 865 remove_proc_entry("Stats", proc_fs_cifs); 866 remove_proc_entry("SecurityFlags", proc_fs_cifs); 867 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); 868 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); 869 remove_proc_entry("mount_params", proc_fs_cifs); 870 871 #ifdef CONFIG_CIFS_DFS_UPCALL 872 remove_proc_entry("dfscache", proc_fs_cifs); 873 #endif 874 #ifdef CONFIG_CIFS_SMB_DIRECT 875 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs); 876 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs); 877 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs); 878 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs); 879 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs); 880 remove_proc_entry("smbd_max_send_size", proc_fs_cifs); 881 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs); 882 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs); 883 #endif 884 remove_proc_entry("fs/cifs", NULL); 885 } 886 887 static int cifsFYI_proc_show(struct seq_file *m, void *v) 888 { 889 seq_printf(m, "%d\n", cifsFYI); 890 return 0; 891 } 892 893 static int cifsFYI_proc_open(struct inode *inode, struct file *file) 894 { 895 return single_open(file, cifsFYI_proc_show, NULL); 896 } 897 898 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, 899 size_t count, loff_t *ppos) 900 { 901 char c[2] = { '\0' }; 902 bool bv; 903 int rc; 904 905 rc = get_user(c[0], buffer); 906 if (rc) 907 return rc; 908 if (kstrtobool(c, &bv) == 0) 909 cifsFYI = bv; 910 else if ((c[0] > '1') && (c[0] <= '9')) 911 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ 912 else 913 return -EINVAL; 914 915 return count; 916 } 917 918 static const struct proc_ops cifsFYI_proc_ops = { 919 .proc_open = cifsFYI_proc_open, 920 .proc_read = seq_read, 921 .proc_lseek = seq_lseek, 922 .proc_release = single_release, 923 .proc_write = cifsFYI_proc_write, 924 }; 925 926 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) 927 { 928 seq_printf(m, "%d\n", linuxExtEnabled); 929 return 0; 930 } 931 932 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) 933 { 934 return single_open(file, cifs_linux_ext_proc_show, NULL); 935 } 936 937 static ssize_t cifs_linux_ext_proc_write(struct file *file, 938 const char __user *buffer, size_t count, loff_t *ppos) 939 { 940 int rc; 941 942 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); 943 if (rc) 944 return rc; 945 946 return count; 947 } 948 949 static const struct proc_ops cifs_linux_ext_proc_ops = { 950 .proc_open = cifs_linux_ext_proc_open, 951 .proc_read = seq_read, 952 .proc_lseek = seq_lseek, 953 .proc_release = single_release, 954 .proc_write = cifs_linux_ext_proc_write, 955 }; 956 957 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) 958 { 959 seq_printf(m, "%d\n", lookupCacheEnabled); 960 return 0; 961 } 962 963 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) 964 { 965 return single_open(file, cifs_lookup_cache_proc_show, NULL); 966 } 967 968 static ssize_t cifs_lookup_cache_proc_write(struct file *file, 969 const char __user *buffer, size_t count, loff_t *ppos) 970 { 971 int rc; 972 973 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); 974 if (rc) 975 return rc; 976 977 return count; 978 } 979 980 static const struct proc_ops cifs_lookup_cache_proc_ops = { 981 .proc_open = cifs_lookup_cache_proc_open, 982 .proc_read = seq_read, 983 .proc_lseek = seq_lseek, 984 .proc_release = single_release, 985 .proc_write = cifs_lookup_cache_proc_write, 986 }; 987 988 static int traceSMB_proc_show(struct seq_file *m, void *v) 989 { 990 seq_printf(m, "%d\n", traceSMB); 991 return 0; 992 } 993 994 static int traceSMB_proc_open(struct inode *inode, struct file *file) 995 { 996 return single_open(file, traceSMB_proc_show, NULL); 997 } 998 999 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, 1000 size_t count, loff_t *ppos) 1001 { 1002 int rc; 1003 1004 rc = kstrtobool_from_user(buffer, count, &traceSMB); 1005 if (rc) 1006 return rc; 1007 1008 return count; 1009 } 1010 1011 static const struct proc_ops traceSMB_proc_ops = { 1012 .proc_open = traceSMB_proc_open, 1013 .proc_read = seq_read, 1014 .proc_lseek = seq_lseek, 1015 .proc_release = single_release, 1016 .proc_write = traceSMB_proc_write, 1017 }; 1018 1019 static int cifs_security_flags_proc_show(struct seq_file *m, void *v) 1020 { 1021 seq_printf(m, "0x%x\n", global_secflags); 1022 return 0; 1023 } 1024 1025 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) 1026 { 1027 return single_open(file, cifs_security_flags_proc_show, NULL); 1028 } 1029 1030 /* 1031 * Ensure that if someone sets a MUST flag, that we disable all other MAY 1032 * flags except for the ones corresponding to the given MUST flag. If there are 1033 * multiple MUST flags, then try to prefer more secure ones. 1034 */ 1035 static void 1036 cifs_security_flags_handle_must_flags(unsigned int *flags) 1037 { 1038 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN; 1039 1040 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) 1041 *flags = CIFSSEC_MUST_KRB5; 1042 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) 1043 *flags = CIFSSEC_MUST_NTLMSSP; 1044 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) 1045 *flags = CIFSSEC_MUST_NTLMV2; 1046 1047 *flags |= signflags; 1048 } 1049 1050 static ssize_t cifs_security_flags_proc_write(struct file *file, 1051 const char __user *buffer, size_t count, loff_t *ppos) 1052 { 1053 int rc; 1054 unsigned int flags; 1055 char flags_string[12]; 1056 bool bv; 1057 1058 if ((count < 1) || (count > 11)) 1059 return -EINVAL; 1060 1061 memset(flags_string, 0, 12); 1062 1063 if (copy_from_user(flags_string, buffer, count)) 1064 return -EFAULT; 1065 1066 if (count < 3) { 1067 /* single char or single char followed by null */ 1068 if (kstrtobool(flags_string, &bv) == 0) { 1069 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; 1070 return count; 1071 } else if (!isdigit(flags_string[0])) { 1072 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1073 flags_string); 1074 return -EINVAL; 1075 } 1076 } 1077 1078 /* else we have a number */ 1079 rc = kstrtouint(flags_string, 0, &flags); 1080 if (rc) { 1081 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 1082 flags_string); 1083 return rc; 1084 } 1085 1086 cifs_dbg(FYI, "sec flags 0x%x\n", flags); 1087 1088 if (flags == 0) { 1089 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); 1090 return -EINVAL; 1091 } 1092 1093 if (flags & ~CIFSSEC_MASK) { 1094 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", 1095 flags & ~CIFSSEC_MASK); 1096 return -EINVAL; 1097 } 1098 1099 cifs_security_flags_handle_must_flags(&flags); 1100 1101 /* flags look ok - update the global security flags for cifs module */ 1102 global_secflags = flags; 1103 if (global_secflags & CIFSSEC_MUST_SIGN) { 1104 /* requiring signing implies signing is allowed */ 1105 global_secflags |= CIFSSEC_MAY_SIGN; 1106 cifs_dbg(FYI, "packet signing now required\n"); 1107 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { 1108 cifs_dbg(FYI, "packet signing disabled\n"); 1109 } 1110 /* BB should we turn on MAY flags for other MUST options? */ 1111 return count; 1112 } 1113 1114 static const struct proc_ops cifs_security_flags_proc_ops = { 1115 .proc_open = cifs_security_flags_proc_open, 1116 .proc_read = seq_read, 1117 .proc_lseek = seq_lseek, 1118 .proc_release = single_release, 1119 .proc_write = cifs_security_flags_proc_write, 1120 }; 1121 1122 /* To make it easier to debug, can help to show mount params */ 1123 static int cifs_mount_params_proc_show(struct seq_file *m, void *v) 1124 { 1125 const struct fs_parameter_spec *p; 1126 const char *type; 1127 1128 for (p = smb3_fs_parameters; p->name; p++) { 1129 /* cannot use switch with pointers... */ 1130 if (!p->type) { 1131 if (p->flags == fs_param_neg_with_no) 1132 type = "noflag"; 1133 else 1134 type = "flag"; 1135 } else if (p->type == fs_param_is_bool) 1136 type = "bool"; 1137 else if (p->type == fs_param_is_u32) 1138 type = "u32"; 1139 else if (p->type == fs_param_is_u64) 1140 type = "u64"; 1141 else if (p->type == fs_param_is_string) 1142 type = "string"; 1143 else 1144 type = "unknown"; 1145 1146 seq_printf(m, "%s:%s\n", p->name, type); 1147 } 1148 1149 return 0; 1150 } 1151 1152 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file) 1153 { 1154 return single_open(file, cifs_mount_params_proc_show, NULL); 1155 } 1156 1157 static const struct proc_ops cifs_mount_params_proc_ops = { 1158 .proc_open = cifs_mount_params_proc_open, 1159 .proc_read = seq_read, 1160 .proc_lseek = seq_lseek, 1161 .proc_release = single_release, 1162 /* No need for write for now */ 1163 /* .proc_write = cifs_mount_params_proc_write, */ 1164 }; 1165 1166 #else 1167 inline void cifs_proc_init(void) 1168 { 1169 } 1170 1171 inline void cifs_proc_clean(void) 1172 { 1173 } 1174 #endif /* PROC_FS */ 1175