fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   fs/cifs_debug.c
   4  *
   5  *   Copyright (C) International Business Machines  Corp., 2000,2005
   6  *
   7  *   Modified by Steve French (sfrench@us.ibm.com)
   8  */
   9 #include <linux/fs.h>
  10 #include <linux/string.h>
  11 #include <linux/ctype.h>
  12 #include <linux/module.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/uaccess.h>
  15 #include "cifspdu.h"
  16 #include "cifsglob.h"
  17 #include "cifsproto.h"
  18 #include "cifs_debug.h"
  19 #include "cifsfs.h"
  20 #ifdef CONFIG_CIFS_DFS_UPCALL
  21 #include "dfs_cache.h"
  22 #endif
  23 #ifdef CONFIG_CIFS_SMB_DIRECT
  24 #include "smbdirect.h"
  25 #endif
  26 #ifdef CONFIG_CIFS_SWN_UPCALL
  27 #include "cifs_swn.h"
  28 #endif
  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 = (struct smb_hdr *)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, server));
  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 list_head *tmp;
  55         struct mid_q_entry *mid_entry;
  56
  57         if (server == NULL)
  58                 return;
  59
  60         cifs_dbg(VFS, "Dump pending requests:\n");
  61         spin_lock(&GlobalMid_Lock);
  62         list_for_each(tmp, &server->pending_mid_q) {
  63                 mid_entry = list_entry(tmp, struct mid_q_entry, 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(&GlobalMid_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->treeName, 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->tidStatus);
 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_printf(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 #ifdef CONFIG_CIFS_SWN_UPCALL
 122         if (tcon->use_witness)
 123                 seq_puts(m, " Witness");
 124 #endif
 125
 126         if (tcon->need_reconnect)
 127                 seq_puts(m, "\tDISCONNECTED ");
 128         seq_putc(m, '\n');
 129 }
 130
 131 static void
 132 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 133 {
 134         struct TCP_Server_Info *server = chan->server;
 135
 136         seq_printf(m, "\t\tChannel %d Number of credits: %d Dialect 0x%x "
 137                    "TCP status: %d Instance: %d Local Users To Server: %d "
 138                    "SecMode: 0x%x Req On Wire: %d In Send: %d "
 139                    "In MaxReq Wait: %d\n",
 140                    i+1,
 141                    server->credits,
 142                    server->dialect,
 143                    server->tcpStatus,
 144                    server->reconnect_instance,
 145                    server->srv_count,
 146                    server->sec_mode,
 147                    in_flight(server),
 148                    atomic_read(&server->in_send),
 149                    atomic_read(&server->num_waiters));
 150 }
 151
 152 static void
 153 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 154 {
 155         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 156         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 157
 158         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 159         seq_puts(m, "\t\tCapabilities: ");
 160         if (iface->rdma_capable)
 161                 seq_puts(m, "rdma ");
 162         if (iface->rss_capable)
 163                 seq_puts(m, "rss ");
 164         seq_putc(m, '\n');
 165         if (iface->sockaddr.ss_family == AF_INET)
 166                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 167         else if (iface->sockaddr.ss_family == AF_INET6)
 168                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 169 }
 170
 171 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 172 {
 173         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 174         struct TCP_Server_Info *server;
 175         struct cifs_ses *ses;
 176         struct cifs_tcon *tcon;
 177         struct cifsFileInfo *cfile;
 178
 179         seq_puts(m, "# Version:1\n");
 180         seq_puts(m, "# Format:\n");
 181         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 182 #ifdef CONFIG_CIFS_DEBUG2
 183         seq_printf(m, " <filename> <mid>\n");
 184 #else
 185         seq_printf(m, " <filename>\n");
 186 #endif /* CIFS_DEBUG2 */
 187         spin_lock(&cifs_tcp_ses_lock);
 188         list_for_each(stmp, &cifs_tcp_ses_list) {
 189                 server = list_entry(stmp, struct TCP_Server_Info,
 190                                     tcp_ses_list);
 191                 list_for_each(tmp, &server->smb_ses_list) {
 192                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 193                         list_for_each(tmp1, &ses->tcon_list) {
 194                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 195                                 spin_lock(&tcon->open_file_lock);
 196                                 list_for_each(tmp2, &tcon->openFileList) {
 197                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 198                                                      tlist);
 199                                         seq_printf(m,
 200                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 201                                                 tcon->tid,
 202                                                 cfile->fid.persistent_fid,
 203                                                 cfile->f_flags,
 204                                                 cfile->count,
 205                                                 cfile->pid,
 206                                                 from_kuid(&init_user_ns, cfile->uid),
 207                                                 cfile->dentry->d_name.name);
 208 #ifdef CONFIG_CIFS_DEBUG2
 209                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 210 #else
 211                                         seq_printf(m, "\n");
 212 #endif /* CIFS_DEBUG2 */
 213                                 }
 214                                 spin_unlock(&tcon->open_file_lock);
 215                         }
 216                 }
 217         }
 218         spin_unlock(&cifs_tcp_ses_lock);
 219         seq_putc(m, '\n');
 220         return 0;
 221 }
 222
 223 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 224 {
 225         struct list_head *tmp1, *tmp2, *tmp3;
 226         struct mid_q_entry *mid_entry;
 227         struct TCP_Server_Info *server;
 228         struct cifs_ses *ses;
 229         struct cifs_tcon *tcon;
 230         int i, j;
 231
 232         seq_puts(m,
 233                     "Display Internal CIFS Data Structures for Debugging\n"
 234                     "---------------------------------------------------\n");
 235         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 236         seq_printf(m, "Features:");
 237 #ifdef CONFIG_CIFS_DFS_UPCALL
 238         seq_printf(m, " DFS");
 239 #endif
 240 #ifdef CONFIG_CIFS_FSCACHE
 241         seq_printf(m, ",FSCACHE");
 242 #endif
 243 #ifdef CONFIG_CIFS_SMB_DIRECT
 244         seq_printf(m, ",SMB_DIRECT");
 245 #endif
 246 #ifdef CONFIG_CIFS_STATS2
 247         seq_printf(m, ",STATS2");
 248 #else
 249         seq_printf(m, ",STATS");
 250 #endif
 251 #ifdef CONFIG_CIFS_DEBUG2
 252         seq_printf(m, ",DEBUG2");
 253 #elif defined(CONFIG_CIFS_DEBUG)
 254         seq_printf(m, ",DEBUG");
 255 #endif
 256 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 257         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 258 #endif
 259 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 260         seq_printf(m, ",WEAK_PW_HASH");
 261 #endif
 262 #ifdef CONFIG_CIFS_POSIX
 263         seq_printf(m, ",CIFS_POSIX");
 264 #endif
 265 #ifdef CONFIG_CIFS_UPCALL
 266         seq_printf(m, ",UPCALL(SPNEGO)");
 267 #endif
 268 #ifdef CONFIG_CIFS_XATTR
 269         seq_printf(m, ",XATTR");
 270 #endif
 271         seq_printf(m, ",ACL");
 272 #ifdef CONFIG_CIFS_SWN_UPCALL
 273         seq_puts(m, ",WITNESS");
 274 #endif
 275         seq_putc(m, '\n');
 276         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 277         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 278         seq_printf(m, "Servers:");
 279
 280         i = 0;
 281         spin_lock(&cifs_tcp_ses_lock);
 282         list_for_each(tmp1, &cifs_tcp_ses_list) {
 283                 server = list_entry(tmp1, struct TCP_Server_Info,
 284                                     tcp_ses_list);
 285
 286 #ifdef CONFIG_CIFS_SMB_DIRECT
 287                 if (!server->rdma)
 288                         goto skip_rdma;
 289
 290                 if (!server->smbd_conn) {
 291                         seq_printf(m, "\nSMBDirect transport not available");
 292                         goto skip_rdma;
 293                 }
 294
 295                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 296                         "transport status: %x",
 297                         server->smbd_conn->protocol,
 298                         server->smbd_conn->transport_status);
 299                 seq_printf(m, "\nConn receive_credit_max: %x "
 300                         "send_credit_target: %x max_send_size: %x",
 301                         server->smbd_conn->receive_credit_max,
 302                         server->smbd_conn->send_credit_target,
 303                         server->smbd_conn->max_send_size);
 304                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 305                         "max_fragmented_send_size: %x max_receive_size:%x",
 306                         server->smbd_conn->max_fragmented_recv_size,
 307                         server->smbd_conn->max_fragmented_send_size,
 308                         server->smbd_conn->max_receive_size);
 309                 seq_printf(m, "\nConn keep_alive_interval: %x "
 310                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 311                         server->smbd_conn->keep_alive_interval,
 312                         server->smbd_conn->max_readwrite_size,
 313                         server->smbd_conn->rdma_readwrite_threshold);
 314                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 315                         "count_put_receive_buffer: %x count_send_empty: %x",
 316                         server->smbd_conn->count_get_receive_buffer,
 317                         server->smbd_conn->count_put_receive_buffer,
 318                         server->smbd_conn->count_send_empty);
 319                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 320                         "count_enqueue_reassembly_queue: %x "
 321                         "count_dequeue_reassembly_queue: %x "
 322                         "fragment_reassembly_remaining: %x "
 323                         "reassembly_data_length: %x "
 324                         "reassembly_queue_length: %x",
 325                         server->smbd_conn->count_reassembly_queue,
 326                         server->smbd_conn->count_enqueue_reassembly_queue,
 327                         server->smbd_conn->count_dequeue_reassembly_queue,
 328                         server->smbd_conn->fragment_reassembly_remaining,
 329                         server->smbd_conn->reassembly_data_length,
 330                         server->smbd_conn->reassembly_queue_length);
 331                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 332                         "receive_credits: %x receive_credit_target: %x",
 333                         atomic_read(&server->smbd_conn->send_credits),
 334                         atomic_read(&server->smbd_conn->receive_credits),
 335                         server->smbd_conn->receive_credit_target);
 336                 seq_printf(m, "\nPending send_pending: %x ",
 337                         atomic_read(&server->smbd_conn->send_pending));
 338                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 339                         "count_empty_packet_queue: %x",
 340                         server->smbd_conn->count_receive_queue,
 341                         server->smbd_conn->count_empty_packet_queue);
 342                 seq_printf(m, "\nMR responder_resources: %x "
 343                         "max_frmr_depth: %x mr_type: %x",
 344                         server->smbd_conn->responder_resources,
 345                         server->smbd_conn->max_frmr_depth,
 346                         server->smbd_conn->mr_type);
 347                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 348                         atomic_read(&server->smbd_conn->mr_ready_count),
 349                         atomic_read(&server->smbd_conn->mr_used_count));
 350 skip_rdma:
 351 #endif
 352                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 353                         server->credits,  server->dialect);
 354                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 355                         seq_printf(m, " COMPRESS_LZNT1");
 356                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 357                         seq_printf(m, " COMPRESS_LZ77");
 358                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 359                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 360                 if (server->sign)
 361                         seq_printf(m, " signed");
 362                 if (server->posix_ext_supported)
 363                         seq_printf(m, " posix");
 364
 365                 i++;
 366                 list_for_each(tmp2, &server->smb_ses_list) {
 367                         ses = list_entry(tmp2, struct cifs_ses,
 368                                          smb_ses_list);
 369                         if ((ses->serverDomain == NULL) ||
 370                                 (ses->serverOS == NULL) ||
 371                                 (ses->serverNOS == NULL)) {
 372                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 373                                         i, ses->serverName, ses->ses_count,
 374                                         ses->capabilities, ses->status);
 375                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 376                                         seq_printf(m, "Guest\t");
 377                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 378                                         seq_printf(m, "Anonymous\t");
 379                         } else {
 380                                 seq_printf(m,
 381                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 382                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 383                                     " session status: %d ",
 384                                 i, ses->serverName, ses->serverDomain,
 385                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 386                                 ses->capabilities, ses->status);
 387                         }
 388
 389                         seq_printf(m,"Security type: %s\n",
 390                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 391
 392                         if (server->rdma)
 393                                 seq_printf(m, "RDMA\n\t");
 394                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 395                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 396                                    server->tcpStatus,
 397                                    server->reconnect_instance,
 398                                    server->srv_count,
 399                                    server->sec_mode, in_flight(server));
 400
 401                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 402                                 atomic_read(&server->in_send),
 403                                 atomic_read(&server->num_waiters));
 404
 405                         /* dump session id helpful for use with network trace */
 406                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 407                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 408                                 seq_puts(m, " encrypted");
 409                         if (ses->sign)
 410                                 seq_puts(m, " signed");
 411
 412                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 413                                    from_kuid(&init_user_ns, ses->linux_uid),
 414                                    from_kuid(&init_user_ns, ses->cred_uid));
 415
 416                         if (ses->chan_count > 1) {
 417                                 seq_printf(m, "\n\n\tExtra Channels: %zu\n",
 418                                            ses->chan_count-1);
 419                                 for (j = 1; j < ses->chan_count; j++)
 420                                         cifs_dump_channel(m, j, &ses->chans[j]);
 421                         }
 422
 423                         seq_puts(m, "\n\n\tShares:");
 424                         j = 0;
 425
 426                         seq_printf(m, "\n\t%d) IPC: ", j);
 427                         if (ses->tcon_ipc)
 428                                 cifs_debug_tcon(m, ses->tcon_ipc);
 429                         else
 430                                 seq_puts(m, "none\n");
 431
 432                         list_for_each(tmp3, &ses->tcon_list) {
 433                                 tcon = list_entry(tmp3, struct cifs_tcon,
 434                                                   tcon_list);
 435                                 ++j;
 436                                 seq_printf(m, "\n\t%d) ", j);
 437                                 cifs_debug_tcon(m, tcon);
 438                         }
 439
 440                         seq_puts(m, "\n\tMIDs:\n");
 441
 442                         spin_lock(&GlobalMid_Lock);
 443                         list_for_each(tmp3, &server->pending_mid_q) {
 444                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 445                                         qhead);
 446                                 seq_printf(m, "\tState: %d com: %d pid:"
 447                                               " %d cbdata: %p mid %llu\n",
 448                                               mid_entry->mid_state,
 449                                               le16_to_cpu(mid_entry->command),
 450                                               mid_entry->pid,
 451                                               mid_entry->callback_data,
 452                                               mid_entry->mid);
 453                         }
 454                         spin_unlock(&GlobalMid_Lock);
 455
 456                         spin_lock(&ses->iface_lock);
 457                         if (ses->iface_count)
 458                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 459                                            ses->iface_count);
 460                         for (j = 0; j < ses->iface_count; j++) {
 461                                 struct cifs_server_iface *iface;
 462
 463                                 iface = &ses->iface_list[j];
 464                                 seq_printf(m, "\t%d)", j);
 465                                 cifs_dump_iface(m, iface);
 466                                 if (is_ses_using_iface(ses, iface))
 467                                         seq_puts(m, "\t\t[CONNECTED]\n");
 468                         }
 469                         spin_unlock(&ses->iface_lock);
 470                 }
 471         }
 472         spin_unlock(&cifs_tcp_ses_lock);
 473         seq_putc(m, '\n');
 474
 475 #ifdef CONFIG_CIFS_SWN_UPCALL
 476         cifs_swn_dump(m);
 477 #endif
 478         /* BB add code to dump additional info such as TCP session info now */
 479         return 0;
 480 }
 481
 482 static ssize_t cifs_stats_proc_write(struct file *file,
 483                 const char __user *buffer, size_t count, loff_t *ppos)
 484 {
 485         bool bv;
 486         int rc;
 487         struct list_head *tmp1, *tmp2, *tmp3;
 488         struct TCP_Server_Info *server;
 489         struct cifs_ses *ses;
 490         struct cifs_tcon *tcon;
 491
 492         rc = kstrtobool_from_user(buffer, count, &bv);
 493         if (rc == 0) {
 494 #ifdef CONFIG_CIFS_STATS2
 495                 int i;
 496
 497                 atomic_set(&totBufAllocCount, 0);
 498                 atomic_set(&totSmBufAllocCount, 0);
 499 #endif /* CONFIG_CIFS_STATS2 */
 500                 atomic_set(&tcpSesReconnectCount, 0);
 501                 atomic_set(&tconInfoReconnectCount, 0);
 502
 503                 spin_lock(&GlobalMid_Lock);
 504                 GlobalMaxActiveXid = 0;
 505                 GlobalCurrentXid = 0;
 506                 spin_unlock(&GlobalMid_Lock);
 507                 spin_lock(&cifs_tcp_ses_lock);
 508                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 509                         server = list_entry(tmp1, struct TCP_Server_Info,
 510                                             tcp_ses_list);
 511                         server->max_in_flight = 0;
 512 #ifdef CONFIG_CIFS_STATS2
 513                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 514                                 atomic_set(&server->num_cmds[i], 0);
 515                                 atomic_set(&server->smb2slowcmd[i], 0);
 516                                 server->time_per_cmd[i] = 0;
 517                                 server->slowest_cmd[i] = 0;
 518                                 server->fastest_cmd[0] = 0;
 519                         }
 520 #endif /* CONFIG_CIFS_STATS2 */
 521                         list_for_each(tmp2, &server->smb_ses_list) {
 522                                 ses = list_entry(tmp2, struct cifs_ses,
 523                                                  smb_ses_list);
 524                                 list_for_each(tmp3, &ses->tcon_list) {
 525                                         tcon = list_entry(tmp3,
 526                                                           struct cifs_tcon,
 527                                                           tcon_list);
 528                                         atomic_set(&tcon->num_smbs_sent, 0);
 529                                         spin_lock(&tcon->stat_lock);
 530                                         tcon->bytes_read = 0;
 531                                         tcon->bytes_written = 0;
 532                                         spin_unlock(&tcon->stat_lock);
 533                                         if (server->ops->clear_stats)
 534                                                 server->ops->clear_stats(tcon);
 535                                 }
 536                         }
 537                 }
 538                 spin_unlock(&cifs_tcp_ses_lock);
 539         } else {
 540                 return rc;
 541         }
 542
 543         return count;
 544 }
 545
 546 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 547 {
 548         int i;
 549 #ifdef CONFIG_CIFS_STATS2
 550         int j;
 551 #endif /* STATS2 */
 552         struct list_head *tmp1, *tmp2, *tmp3;
 553         struct TCP_Server_Info *server;
 554         struct cifs_ses *ses;
 555         struct cifs_tcon *tcon;
 556
 557         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 558                         sesInfoAllocCount.counter);
 559         seq_printf(m, "Share (unique mount targets): %d\n",
 560                         tconInfoAllocCount.counter);
 561         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 562                         bufAllocCount.counter,
 563                         cifs_min_rcv + tcpSesAllocCount.counter);
 564         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 565                         smBufAllocCount.counter, cifs_min_small);
 566 #ifdef CONFIG_CIFS_STATS2
 567         seq_printf(m, "Total Large %d Small %d Allocations\n",
 568                                 atomic_read(&totBufAllocCount),
 569                                 atomic_read(&totSmBufAllocCount));
 570 #endif /* CONFIG_CIFS_STATS2 */
 571
 572         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 573         seq_printf(m,
 574                 "\n%d session %d share reconnects\n",
 575                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 576
 577         seq_printf(m,
 578                 "Total vfs operations: %d maximum at one time: %d\n",
 579                 GlobalCurrentXid, GlobalMaxActiveXid);
 580
 581         i = 0;
 582         spin_lock(&cifs_tcp_ses_lock);
 583         list_for_each(tmp1, &cifs_tcp_ses_list) {
 584                 server = list_entry(tmp1, struct TCP_Server_Info,
 585                                     tcp_ses_list);
 586                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 587 #ifdef CONFIG_CIFS_STATS2
 588                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 589                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 590                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 591                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 592                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 593                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 594                                 atomic_read(&server->num_cmds[j]),
 595                                 server->time_per_cmd[j],
 596                                 server->fastest_cmd[j],
 597                                 server->slowest_cmd[j]);
 598                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 599                         if (atomic_read(&server->smb2slowcmd[j]))
 600                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 601                                         atomic_read(&server->smb2slowcmd[j]),
 602                                         server->hostname, j);
 603 #endif /* STATS2 */
 604                 list_for_each(tmp2, &server->smb_ses_list) {
 605                         ses = list_entry(tmp2, struct cifs_ses,
 606                                          smb_ses_list);
 607                         list_for_each(tmp3, &ses->tcon_list) {
 608                                 tcon = list_entry(tmp3,
 609                                                   struct cifs_tcon,
 610                                                   tcon_list);
 611                                 i++;
 612                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 613                                 if (tcon->need_reconnect)
 614                                         seq_puts(m, "\tDISCONNECTED ");
 615                                 seq_printf(m, "\nSMBs: %d",
 616                                            atomic_read(&tcon->num_smbs_sent));
 617                                 if (server->ops->print_stats)
 618                                         server->ops->print_stats(m, tcon);
 619                         }
 620                 }
 621         }
 622         spin_unlock(&cifs_tcp_ses_lock);
 623
 624         seq_putc(m, '\n');
 625         return 0;
 626 }
 627
 628 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 629 {
 630         return single_open(file, cifs_stats_proc_show, NULL);
 631 }
 632
 633 static const struct proc_ops cifs_stats_proc_ops = {
 634         .proc_open      = cifs_stats_proc_open,
 635         .proc_read      = seq_read,
 636         .proc_lseek     = seq_lseek,
 637         .proc_release   = single_release,
 638         .proc_write     = cifs_stats_proc_write,
 639 };
 640
 641 #ifdef CONFIG_CIFS_SMB_DIRECT
 642 #define PROC_FILE_DEFINE(name) \
 643 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 644         size_t count, loff_t *ppos) \
 645 { \
 646         int rc; \
 647         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 648         if (rc) \
 649                 return rc; \
 650         return count; \
 651 } \
 652 static int name##_proc_show(struct seq_file *m, void *v) \
 653 { \
 654         seq_printf(m, "%d\n", name ); \
 655         return 0; \
 656 } \
 657 static int name##_open(struct inode *inode, struct file *file) \
 658 { \
 659         return single_open(file, name##_proc_show, NULL); \
 660 } \
 661 \
 662 static const struct proc_ops cifs_##name##_proc_fops = { \
 663         .proc_open      = name##_open, \
 664         .proc_read      = seq_read, \
 665         .proc_lseek     = seq_lseek, \
 666         .proc_release   = single_release, \
 667         .proc_write     = name##_write, \
 668 }
 669
 670 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 671 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 672 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 673 PROC_FILE_DEFINE(smbd_max_receive_size);
 674 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 675 PROC_FILE_DEFINE(smbd_max_send_size);
 676 PROC_FILE_DEFINE(smbd_send_credit_target);
 677 PROC_FILE_DEFINE(smbd_receive_credit_max);
 678 #endif
 679
 680 static struct proc_dir_entry *proc_fs_cifs;
 681 static const struct proc_ops cifsFYI_proc_ops;
 682 static const struct proc_ops cifs_lookup_cache_proc_ops;
 683 static const struct proc_ops traceSMB_proc_ops;
 684 static const struct proc_ops cifs_security_flags_proc_ops;
 685 static const struct proc_ops cifs_linux_ext_proc_ops;
 686
 687 void
 688 cifs_proc_init(void)
 689 {
 690         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 691         if (proc_fs_cifs == NULL)
 692                 return;
 693
 694         proc_create_single("DebugData", 0, proc_fs_cifs,
 695                         cifs_debug_data_proc_show);
 696
 697         proc_create_single("open_files", 0400, proc_fs_cifs,
 698                         cifs_debug_files_proc_show);
 699
 700         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 701         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 702         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 703         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 704                     &cifs_linux_ext_proc_ops);
 705         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 706                     &cifs_security_flags_proc_ops);
 707         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 708                     &cifs_lookup_cache_proc_ops);
 709
 710 #ifdef CONFIG_CIFS_DFS_UPCALL
 711         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 712 #endif
 713
 714 #ifdef CONFIG_CIFS_SMB_DIRECT
 715         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 716                 &cifs_rdma_readwrite_threshold_proc_fops);
 717         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 718                 &cifs_smbd_max_frmr_depth_proc_fops);
 719         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 720                 &cifs_smbd_keep_alive_interval_proc_fops);
 721         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 722                 &cifs_smbd_max_receive_size_proc_fops);
 723         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 724                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 725         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 726                 &cifs_smbd_max_send_size_proc_fops);
 727         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 728                 &cifs_smbd_send_credit_target_proc_fops);
 729         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 730                 &cifs_smbd_receive_credit_max_proc_fops);
 731 #endif
 732 }
 733
 734 void
 735 cifs_proc_clean(void)
 736 {
 737         if (proc_fs_cifs == NULL)
 738                 return;
 739
 740         remove_proc_entry("DebugData", proc_fs_cifs);
 741         remove_proc_entry("open_files", proc_fs_cifs);
 742         remove_proc_entry("cifsFYI", proc_fs_cifs);
 743         remove_proc_entry("traceSMB", proc_fs_cifs);
 744         remove_proc_entry("Stats", proc_fs_cifs);
 745         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 746         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 747         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 748
 749 #ifdef CONFIG_CIFS_DFS_UPCALL
 750         remove_proc_entry("dfscache", proc_fs_cifs);
 751 #endif
 752 #ifdef CONFIG_CIFS_SMB_DIRECT
 753         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 754         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 755         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 756         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 757         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 758         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 759         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 760         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 761 #endif
 762         remove_proc_entry("fs/cifs", NULL);
 763 }
 764
 765 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 766 {
 767         seq_printf(m, "%d\n", cifsFYI);
 768         return 0;
 769 }
 770
 771 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 772 {
 773         return single_open(file, cifsFYI_proc_show, NULL);
 774 }
 775
 776 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 777                 size_t count, loff_t *ppos)
 778 {
 779         char c[2] = { '\0' };
 780         bool bv;
 781         int rc;
 782
 783         rc = get_user(c[0], buffer);
 784         if (rc)
 785                 return rc;
 786         if (strtobool(c, &bv) == 0)
 787                 cifsFYI = bv;
 788         else if ((c[0] > '1') && (c[0] <= '9'))
 789                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 790         else
 791                 return -EINVAL;
 792
 793         return count;
 794 }
 795
 796 static const struct proc_ops cifsFYI_proc_ops = {
 797         .proc_open      = cifsFYI_proc_open,
 798         .proc_read      = seq_read,
 799         .proc_lseek     = seq_lseek,
 800         .proc_release   = single_release,
 801         .proc_write     = cifsFYI_proc_write,
 802 };
 803
 804 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 805 {
 806         seq_printf(m, "%d\n", linuxExtEnabled);
 807         return 0;
 808 }
 809
 810 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 811 {
 812         return single_open(file, cifs_linux_ext_proc_show, NULL);
 813 }
 814
 815 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 816                 const char __user *buffer, size_t count, loff_t *ppos)
 817 {
 818         int rc;
 819
 820         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 821         if (rc)
 822                 return rc;
 823
 824         return count;
 825 }
 826
 827 static const struct proc_ops cifs_linux_ext_proc_ops = {
 828         .proc_open      = cifs_linux_ext_proc_open,
 829         .proc_read      = seq_read,
 830         .proc_lseek     = seq_lseek,
 831         .proc_release   = single_release,
 832         .proc_write     = cifs_linux_ext_proc_write,
 833 };
 834
 835 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 836 {
 837         seq_printf(m, "%d\n", lookupCacheEnabled);
 838         return 0;
 839 }
 840
 841 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 842 {
 843         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 844 }
 845
 846 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 847                 const char __user *buffer, size_t count, loff_t *ppos)
 848 {
 849         int rc;
 850
 851         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 852         if (rc)
 853                 return rc;
 854
 855         return count;
 856 }
 857
 858 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 859         .proc_open      = cifs_lookup_cache_proc_open,
 860         .proc_read      = seq_read,
 861         .proc_lseek     = seq_lseek,
 862         .proc_release   = single_release,
 863         .proc_write     = cifs_lookup_cache_proc_write,
 864 };
 865
 866 static int traceSMB_proc_show(struct seq_file *m, void *v)
 867 {
 868         seq_printf(m, "%d\n", traceSMB);
 869         return 0;
 870 }
 871
 872 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 873 {
 874         return single_open(file, traceSMB_proc_show, NULL);
 875 }
 876
 877 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 878                 size_t count, loff_t *ppos)
 879 {
 880         int rc;
 881
 882         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 883         if (rc)
 884                 return rc;
 885
 886         return count;
 887 }
 888
 889 static const struct proc_ops traceSMB_proc_ops = {
 890         .proc_open      = traceSMB_proc_open,
 891         .proc_read      = seq_read,
 892         .proc_lseek     = seq_lseek,
 893         .proc_release   = single_release,
 894         .proc_write     = traceSMB_proc_write,
 895 };
 896
 897 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 898 {
 899         seq_printf(m, "0x%x\n", global_secflags);
 900         return 0;
 901 }
 902
 903 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 904 {
 905         return single_open(file, cifs_security_flags_proc_show, NULL);
 906 }
 907
 908 /*
 909  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 910  * flags except for the ones corresponding to the given MUST flag. If there are
 911  * multiple MUST flags, then try to prefer more secure ones.
 912  */
 913 static void
 914 cifs_security_flags_handle_must_flags(unsigned int *flags)
 915 {
 916         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 917
 918         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 919                 *flags = CIFSSEC_MUST_KRB5;
 920         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 921                 *flags = CIFSSEC_MUST_NTLMSSP;
 922         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 923                 *flags = CIFSSEC_MUST_NTLMV2;
 924         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 925                 *flags = CIFSSEC_MUST_NTLM;
 926         else if (CIFSSEC_MUST_LANMAN &&
 927                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 928                 *flags = CIFSSEC_MUST_LANMAN;
 929         else if (CIFSSEC_MUST_PLNTXT &&
 930                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 931                 *flags = CIFSSEC_MUST_PLNTXT;
 932
 933         *flags |= signflags;
 934 }
 935
 936 static ssize_t cifs_security_flags_proc_write(struct file *file,
 937                 const char __user *buffer, size_t count, loff_t *ppos)
 938 {
 939         int rc;
 940         unsigned int flags;
 941         char flags_string[12];
 942         bool bv;
 943
 944         if ((count < 1) || (count > 11))
 945                 return -EINVAL;
 946
 947         memset(flags_string, 0, 12);
 948
 949         if (copy_from_user(flags_string, buffer, count))
 950                 return -EFAULT;
 951
 952         if (count < 3) {
 953                 /* single char or single char followed by null */
 954                 if (strtobool(flags_string, &bv) == 0) {
 955                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 956                         return count;
 957                 } else if (!isdigit(flags_string[0])) {
 958                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 959                                         flags_string);
 960                         return -EINVAL;
 961                 }
 962         }
 963
 964         /* else we have a number */
 965         rc = kstrtouint(flags_string, 0, &flags);
 966         if (rc) {
 967                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 968                                 flags_string);
 969                 return rc;
 970         }
 971
 972         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 973
 974         if (flags == 0)  {
 975                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 976                 return -EINVAL;
 977         }
 978
 979         if (flags & ~CIFSSEC_MASK) {
 980                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 981                          flags & ~CIFSSEC_MASK);
 982                 return -EINVAL;
 983         }
 984
 985         cifs_security_flags_handle_must_flags(&flags);
 986
 987         /* flags look ok - update the global security flags for cifs module */
 988         global_secflags = flags;
 989         if (global_secflags & CIFSSEC_MUST_SIGN) {
 990                 /* requiring signing implies signing is allowed */
 991                 global_secflags |= CIFSSEC_MAY_SIGN;
 992                 cifs_dbg(FYI, "packet signing now required\n");
 993         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 994                 cifs_dbg(FYI, "packet signing disabled\n");
 995         }
 996         /* BB should we turn on MAY flags for other MUST options? */
 997         return count;
 998 }
 999
1000 static const struct proc_ops cifs_security_flags_proc_ops = {
1001         .proc_open      = cifs_security_flags_proc_open,
1002         .proc_read      = seq_read,
1003         .proc_lseek     = seq_lseek,
1004         .proc_release   = single_release,
1005         .proc_write     = cifs_security_flags_proc_write,
1006 };
1007 #else
1008 inline void cifs_proc_init(void)
1009 {
1010 }
1011
1012 inline void cifs_proc_clean(void)
1013 {
1014 }
1015 #endif /* PROC_FS */