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