fs/cifs/cifs_debug.c

   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 "cifspdu.h"
  16 #include "cifsglob.h"
  17 #include "cifsproto.h"
  18 #include "cifs_debug.h"
  19 #include "cifsfs.h"
  20 #include "fs_context.h"
  21 #ifdef CONFIG_CIFS_DFS_UPCALL
  22 #include "dfs_cache.h"
  23 #endif
  24 #ifdef CONFIG_CIFS_SMB_DIRECT
  25 #include "smbdirect.h"
  26 #endif
  27 #include "cifs_swn.h"
  28
  29 void
  30 cifs_dump_mem(char *label, void *data, int length)
  31 {
  32         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  33         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  34                        data, length, true);
  35 }
  36
  37 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  38 {
  39 #ifdef CONFIG_CIFS_DEBUG2
  40         struct smb_hdr *smb = buf;
  41
  42         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  43                  smb->Command, smb->Status.CifsError,
  44                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  45         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  46                  server->ops->calc_smb_size(smb));
  47 #endif /* CONFIG_CIFS_DEBUG2 */
  48 }
  49
  50 void cifs_dump_mids(struct TCP_Server_Info *server)
  51 {
  52 #ifdef CONFIG_CIFS_DEBUG2
  53         struct mid_q_entry *mid_entry;
  54
  55         if (server == NULL)
  56                 return;
  57
  58         cifs_dbg(VFS, "Dump pending requests:\n");
  59         spin_lock(&server->mid_lock);
  60         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  61                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  62                          mid_entry->mid_state,
  63                          le16_to_cpu(mid_entry->command),
  64                          mid_entry->pid,
  65                          mid_entry->callback_data,
  66                          mid_entry->mid);
  67 #ifdef CONFIG_CIFS_STATS2
  68                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  69                          mid_entry->large_buf,
  70                          mid_entry->resp_buf,
  71                          mid_entry->when_received,
  72                          jiffies);
  73 #endif /* STATS2 */
  74                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  75                          mid_entry->multiRsp, mid_entry->multiEnd);
  76                 if (mid_entry->resp_buf) {
  77                         cifs_dump_detail(mid_entry->resp_buf, server);
  78                         cifs_dump_mem("existing buf: ",
  79                                 mid_entry->resp_buf, 62);
  80                 }
  81         }
  82         spin_unlock(&server->mid_lock);
  83 #endif /* CONFIG_CIFS_DEBUG2 */
  84 }
  85
  86 #ifdef CONFIG_PROC_FS
  87 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  88 {
  89         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  90
  91         seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
  92         if (tcon->nativeFileSystem)
  93                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  94         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  95                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  96                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  97                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  98                    tcon->status);
  99         if (dev_type == FILE_DEVICE_DISK)
 100                 seq_puts(m, " type: DISK ");
 101         else if (dev_type == FILE_DEVICE_CD_ROM)
 102                 seq_puts(m, " type: CDROM ");
 103         else
 104                 seq_printf(m, " type: %d ", dev_type);
 105
 106         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 107
 108         if ((tcon->seal) ||
 109             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 110             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 111                 seq_printf(m, " Encrypted");
 112         if (tcon->nocase)
 113                 seq_printf(m, " nocase");
 114         if (tcon->unix_ext)
 115                 seq_printf(m, " POSIX Extensions");
 116         if (tcon->ses->server->ops->dump_share_caps)
 117                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 118         if (tcon->use_witness)
 119                 seq_puts(m, " Witness");
 120         if (tcon->broken_sparse_sup)
 121                 seq_puts(m, " nosparse");
 122         if (tcon->need_reconnect)
 123                 seq_puts(m, "\tDISCONNECTED ");
 124         seq_putc(m, '\n');
 125 }
 126
 127 static void
 128 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 129 {
 130         struct TCP_Server_Info *server = chan->server;
 131
 132         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 133                    "\n\t\tNumber of credits: %d Dialect 0x%x"
 134                    "\n\t\tTCP status: %d Instance: %d"
 135                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 136                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 137                    i+1, server->conn_id,
 138                    server->credits,
 139                    server->dialect,
 140                    server->tcpStatus,
 141                    server->reconnect_instance,
 142                    server->srv_count,
 143                    server->sec_mode,
 144                    in_flight(server),
 145                    atomic_read(&server->in_send),
 146                    atomic_read(&server->num_waiters));
 147 }
 148
 149 static void
 150 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 151 {
 152         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 153         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 154
 155         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 156         seq_puts(m, "\t\tCapabilities: ");
 157         if (iface->rdma_capable)
 158                 seq_puts(m, "rdma ");
 159         if (iface->rss_capable)
 160                 seq_puts(m, "rss ");
 161         seq_putc(m, '\n');
 162         if (iface->sockaddr.ss_family == AF_INET)
 163                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 164         else if (iface->sockaddr.ss_family == AF_INET6)
 165                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 166         if (!iface->is_active)
 167                 seq_puts(m, "\t\t[for-cleanup]\n");
 168 }
 169
 170 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 171 {
 172         struct TCP_Server_Info *server;
 173         struct cifs_ses *ses;
 174         struct cifs_tcon *tcon;
 175         struct cifsFileInfo *cfile;
 176
 177         seq_puts(m, "# Version:1\n");
 178         seq_puts(m, "# Format:\n");
 179         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 180 #ifdef CONFIG_CIFS_DEBUG2
 181         seq_printf(m, " <filename> <mid>\n");
 182 #else
 183         seq_printf(m, " <filename>\n");
 184 #endif /* CIFS_DEBUG2 */
 185         spin_lock(&cifs_tcp_ses_lock);
 186         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 187                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 188                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 189                                 spin_lock(&tcon->open_file_lock);
 190                                 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 191                                         seq_printf(m,
 192                                                 "0x%x 0x%llx 0x%x %d %d %d %pd",
 193                                                 tcon->tid,
 194                                                 cfile->fid.persistent_fid,
 195                                                 cfile->f_flags,
 196                                                 cfile->count,
 197                                                 cfile->pid,
 198                                                 from_kuid(&init_user_ns, cfile->uid),
 199                                                 cfile->dentry);
 200 #ifdef CONFIG_CIFS_DEBUG2
 201                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 202 #else
 203                                         seq_printf(m, "\n");
 204 #endif /* CIFS_DEBUG2 */
 205                                 }
 206                                 spin_unlock(&tcon->open_file_lock);
 207                         }
 208                 }
 209         }
 210         spin_unlock(&cifs_tcp_ses_lock);
 211         seq_putc(m, '\n');
 212         return 0;
 213 }
 214
 215 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 216 {
 217         struct mid_q_entry *mid_entry;
 218         struct TCP_Server_Info *server;
 219         struct cifs_ses *ses;
 220         struct cifs_tcon *tcon;
 221         struct cifs_server_iface *iface;
 222         int c, i, j;
 223
 224         seq_puts(m,
 225                     "Display Internal CIFS Data Structures for Debugging\n"
 226                     "---------------------------------------------------\n");
 227         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 228         seq_printf(m, "Features:");
 229 #ifdef CONFIG_CIFS_DFS_UPCALL
 230         seq_printf(m, " DFS");
 231 #endif
 232 #ifdef CONFIG_CIFS_FSCACHE
 233         seq_printf(m, ",FSCACHE");
 234 #endif
 235 #ifdef CONFIG_CIFS_SMB_DIRECT
 236         seq_printf(m, ",SMB_DIRECT");
 237 #endif
 238 #ifdef CONFIG_CIFS_STATS2
 239         seq_printf(m, ",STATS2");
 240 #else
 241         seq_printf(m, ",STATS");
 242 #endif
 243 #ifdef CONFIG_CIFS_DEBUG2
 244         seq_printf(m, ",DEBUG2");
 245 #elif defined(CONFIG_CIFS_DEBUG)
 246         seq_printf(m, ",DEBUG");
 247 #endif
 248 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 249         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 250 #endif
 251 #ifdef CONFIG_CIFS_POSIX
 252         seq_printf(m, ",CIFS_POSIX");
 253 #endif
 254 #ifdef CONFIG_CIFS_UPCALL
 255         seq_printf(m, ",UPCALL(SPNEGO)");
 256 #endif
 257 #ifdef CONFIG_CIFS_XATTR
 258         seq_printf(m, ",XATTR");
 259 #endif
 260         seq_printf(m, ",ACL");
 261 #ifdef CONFIG_CIFS_SWN_UPCALL
 262         seq_puts(m, ",WITNESS");
 263 #endif
 264         seq_putc(m, '\n');
 265         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 266         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 267
 268         seq_printf(m, "\nServers: ");
 269
 270         c = 0;
 271         spin_lock(&cifs_tcp_ses_lock);
 272         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 273                 /* channel info will be printed as a part of sessions below */
 274                 if (CIFS_SERVER_IS_CHAN(server))
 275                         continue;
 276
 277                 c++;
 278                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 279                         c, server->conn_id);
 280
 281                 if (server->hostname)
 282                         seq_printf(m, "Hostname: %s ", server->hostname);
 283 #ifdef CONFIG_CIFS_SMB_DIRECT
 284                 if (!server->rdma)
 285                         goto skip_rdma;
 286
 287                 if (!server->smbd_conn) {
 288                         seq_printf(m, "\nSMBDirect transport not available");
 289                         goto skip_rdma;
 290                 }
 291
 292                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 293                         "transport status: %x",
 294                         server->smbd_conn->protocol,
 295                         server->smbd_conn->transport_status);
 296                 seq_printf(m, "\nConn receive_credit_max: %x "
 297                         "send_credit_target: %x max_send_size: %x",
 298                         server->smbd_conn->receive_credit_max,
 299                         server->smbd_conn->send_credit_target,
 300                         server->smbd_conn->max_send_size);
 301                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 302                         "max_fragmented_send_size: %x max_receive_size:%x",
 303                         server->smbd_conn->max_fragmented_recv_size,
 304                         server->smbd_conn->max_fragmented_send_size,
 305                         server->smbd_conn->max_receive_size);
 306                 seq_printf(m, "\nConn keep_alive_interval: %x "
 307                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 308                         server->smbd_conn->keep_alive_interval,
 309                         server->smbd_conn->max_readwrite_size,
 310                         server->smbd_conn->rdma_readwrite_threshold);
 311                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 312                         "count_put_receive_buffer: %x count_send_empty: %x",
 313                         server->smbd_conn->count_get_receive_buffer,
 314                         server->smbd_conn->count_put_receive_buffer,
 315                         server->smbd_conn->count_send_empty);
 316                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 317                         "count_enqueue_reassembly_queue: %x "
 318                         "count_dequeue_reassembly_queue: %x "
 319                         "fragment_reassembly_remaining: %x "
 320                         "reassembly_data_length: %x "
 321                         "reassembly_queue_length: %x",
 322                         server->smbd_conn->count_reassembly_queue,
 323                         server->smbd_conn->count_enqueue_reassembly_queue,
 324                         server->smbd_conn->count_dequeue_reassembly_queue,
 325                         server->smbd_conn->fragment_reassembly_remaining,
 326                         server->smbd_conn->reassembly_data_length,
 327                         server->smbd_conn->reassembly_queue_length);
 328                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 329                         "receive_credits: %x receive_credit_target: %x",
 330                         atomic_read(&server->smbd_conn->send_credits),
 331                         atomic_read(&server->smbd_conn->receive_credits),
 332                         server->smbd_conn->receive_credit_target);
 333                 seq_printf(m, "\nPending send_pending: %x ",
 334                         atomic_read(&server->smbd_conn->send_pending));
 335                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 336                         "count_empty_packet_queue: %x",
 337                         server->smbd_conn->count_receive_queue,
 338                         server->smbd_conn->count_empty_packet_queue);
 339                 seq_printf(m, "\nMR responder_resources: %x "
 340                         "max_frmr_depth: %x mr_type: %x",
 341                         server->smbd_conn->responder_resources,
 342                         server->smbd_conn->max_frmr_depth,
 343                         server->smbd_conn->mr_type);
 344                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 345                         atomic_read(&server->smbd_conn->mr_ready_count),
 346                         atomic_read(&server->smbd_conn->mr_used_count));
 347 skip_rdma:
 348 #endif
 349                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 350                         server->credits,  server->dialect);
 351                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 352                         seq_printf(m, " COMPRESS_LZNT1");
 353                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 354                         seq_printf(m, " COMPRESS_LZ77");
 355                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 356                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 357                 if (server->sign)
 358                         seq_printf(m, " signed");
 359                 if (server->posix_ext_supported)
 360                         seq_printf(m, " posix");
 361                 if (server->nosharesock)
 362                         seq_printf(m, " nosharesock");
 363
 364                 if (server->rdma)
 365                         seq_printf(m, "\nRDMA ");
 366                 seq_printf(m, "\nTCP status: %d Instance: %d"
 367                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 368                                 server->tcpStatus,
 369                                 server->reconnect_instance,
 370                                 server->srv_count,
 371                                 server->sec_mode, in_flight(server));
 372
 373                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 374                                 atomic_read(&server->in_send),
 375                                 atomic_read(&server->num_waiters));
 376                 if (IS_ENABLED(CONFIG_CIFS_DFS_UPCALL)) {
 377                         if (server->origin_fullpath)
 378                                 seq_printf(m, "\nDFS origin full path: %s",
 379                                            server->origin_fullpath);
 380                         if (server->leaf_fullpath)
 381                                 seq_printf(m, "\nDFS leaf full path:   %s",
 382                                            server->leaf_fullpath);
 383                 }
 384
 385                 seq_printf(m, "\n\n\tSessions: ");
 386                 i = 0;
 387                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 388                         i++;
 389                         if ((ses->serverDomain == NULL) ||
 390                                 (ses->serverOS == NULL) ||
 391                                 (ses->serverNOS == NULL)) {
 392                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 393                                         i, ses->ip_addr, ses->ses_count,
 394                                         ses->capabilities, ses->ses_status);
 395                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 396                                         seq_printf(m, "Guest ");
 397                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 398                                         seq_printf(m, "Anonymous ");
 399                         } else {
 400                                 seq_printf(m,
 401                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 402                                     "\n\tNOS: %s\tCapability: 0x%x"
 403                                         "\n\tSMB session status: %d ",
 404                                 i, ses->ip_addr, ses->serverDomain,
 405                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 406                                 ses->capabilities, ses->ses_status);
 407                         }
 408
 409                         seq_printf(m, "\n\tSecurity type: %s ",
 410                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 411
 412                         /* dump session id helpful for use with network trace */
 413                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 414                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 415                                 seq_puts(m, " encrypted");
 416                         if (ses->sign)
 417                                 seq_puts(m, " signed");
 418
 419                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 420                                    from_kuid(&init_user_ns, ses->linux_uid),
 421                                    from_kuid(&init_user_ns, ses->cred_uid));
 422
 423                         spin_lock(&ses->chan_lock);
 424                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 425                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 426                         if (CIFS_CHAN_IN_RECONNECT(ses, 0))
 427                                 seq_puts(m, "\t[RECONNECTING] ");
 428
 429                         if (ses->chan_count > 1) {
 430                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 431                                            ses->chan_count-1);
 432                                 for (j = 1; j < ses->chan_count; j++) {
 433                                         cifs_dump_channel(m, j, &ses->chans[j]);
 434                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 435                                                 seq_puts(m, "\tDISCONNECTED ");
 436                                         if (CIFS_CHAN_IN_RECONNECT(ses, j))
 437                                                 seq_puts(m, "\t[RECONNECTING] ");
 438                                 }
 439                         }
 440                         spin_unlock(&ses->chan_lock);
 441
 442                         seq_puts(m, "\n\n\tShares: ");
 443                         j = 0;
 444
 445                         seq_printf(m, "\n\t%d) IPC: ", j);
 446                         if (ses->tcon_ipc)
 447                                 cifs_debug_tcon(m, ses->tcon_ipc);
 448                         else
 449                                 seq_puts(m, "none\n");
 450
 451                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 452                                 ++j;
 453                                 seq_printf(m, "\n\t%d) ", j);
 454                                 cifs_debug_tcon(m, tcon);
 455                         }
 456
 457                         spin_lock(&ses->iface_lock);
 458                         if (ses->iface_count)
 459                                 seq_printf(m, "\n\n\tServer interfaces: %zu"
 460                                            "\tLast updated: %lu seconds ago",
 461                                            ses->iface_count,
 462                                            (jiffies - ses->iface_last_update) / HZ);
 463                         j = 0;
 464                         list_for_each_entry(iface, &ses->iface_list,
 465                                                  iface_head) {
 466                                 seq_printf(m, "\n\t%d)", ++j);
 467                                 cifs_dump_iface(m, iface);
 468                                 if (is_ses_using_iface(ses, iface))
 469                                         seq_puts(m, "\t\t[CONNECTED]\n");
 470                         }
 471                         spin_unlock(&ses->iface_lock);
 472                 }
 473                 if (i == 0)
 474                         seq_printf(m, "\n\t\t[NONE]");
 475
 476                 seq_puts(m, "\n\n\tMIDs: ");
 477                 spin_lock(&server->mid_lock);
 478                 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
 479                         seq_printf(m, "\n\tState: %d com: %d pid:"
 480                                         " %d cbdata: %p mid %llu\n",
 481                                         mid_entry->mid_state,
 482                                         le16_to_cpu(mid_entry->command),
 483                                         mid_entry->pid,
 484                                         mid_entry->callback_data,
 485                                         mid_entry->mid);
 486                 }
 487                 spin_unlock(&server->mid_lock);
 488                 seq_printf(m, "\n--\n");
 489         }
 490         if (c == 0)
 491                 seq_printf(m, "\n\t[NONE]");
 492
 493         spin_unlock(&cifs_tcp_ses_lock);
 494         seq_putc(m, '\n');
 495         cifs_swn_dump(m);
 496
 497         /* BB add code to dump additional info such as TCP session info now */
 498         return 0;
 499 }
 500
 501 static ssize_t cifs_stats_proc_write(struct file *file,
 502                 const char __user *buffer, size_t count, loff_t *ppos)
 503 {
 504         bool bv;
 505         int rc;
 506         struct TCP_Server_Info *server;
 507         struct cifs_ses *ses;
 508         struct cifs_tcon *tcon;
 509
 510         rc = kstrtobool_from_user(buffer, count, &bv);
 511         if (rc == 0) {
 512 #ifdef CONFIG_CIFS_STATS2
 513                 int i;
 514
 515                 atomic_set(&total_buf_alloc_count, 0);
 516                 atomic_set(&total_small_buf_alloc_count, 0);
 517 #endif /* CONFIG_CIFS_STATS2 */
 518                 atomic_set(&tcpSesReconnectCount, 0);
 519                 atomic_set(&tconInfoReconnectCount, 0);
 520
 521                 spin_lock(&GlobalMid_Lock);
 522                 GlobalMaxActiveXid = 0;
 523                 GlobalCurrentXid = 0;
 524                 spin_unlock(&GlobalMid_Lock);
 525                 spin_lock(&cifs_tcp_ses_lock);
 526                 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 527                         server->max_in_flight = 0;
 528 #ifdef CONFIG_CIFS_STATS2
 529                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 530                                 atomic_set(&server->num_cmds[i], 0);
 531                                 atomic_set(&server->smb2slowcmd[i], 0);
 532                                 server->time_per_cmd[i] = 0;
 533                                 server->slowest_cmd[i] = 0;
 534                                 server->fastest_cmd[0] = 0;
 535                         }
 536 #endif /* CONFIG_CIFS_STATS2 */
 537                         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 538                                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 539                                         atomic_set(&tcon->num_smbs_sent, 0);
 540                                         spin_lock(&tcon->stat_lock);
 541                                         tcon->bytes_read = 0;
 542                                         tcon->bytes_written = 0;
 543                                         spin_unlock(&tcon->stat_lock);
 544                                         if (server->ops->clear_stats)
 545                                                 server->ops->clear_stats(tcon);
 546                                 }
 547                         }
 548                 }
 549                 spin_unlock(&cifs_tcp_ses_lock);
 550         } else {
 551                 return rc;
 552         }
 553
 554         return count;
 555 }
 556
 557 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 558 {
 559         int i;
 560 #ifdef CONFIG_CIFS_STATS2
 561         int j;
 562 #endif /* STATS2 */
 563         struct TCP_Server_Info *server;
 564         struct cifs_ses *ses;
 565         struct cifs_tcon *tcon;
 566
 567         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 568                         sesInfoAllocCount.counter);
 569         seq_printf(m, "Share (unique mount targets): %d\n",
 570                         tconInfoAllocCount.counter);
 571         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 572                         buf_alloc_count.counter,
 573                         cifs_min_rcv + tcpSesAllocCount.counter);
 574         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 575                         small_buf_alloc_count.counter, cifs_min_small);
 576 #ifdef CONFIG_CIFS_STATS2
 577         seq_printf(m, "Total Large %d Small %d Allocations\n",
 578                                 atomic_read(&total_buf_alloc_count),
 579                                 atomic_read(&total_small_buf_alloc_count));
 580 #endif /* CONFIG_CIFS_STATS2 */
 581
 582         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
 583         seq_printf(m,
 584                 "\n%d session %d share reconnects\n",
 585                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 586
 587         seq_printf(m,
 588                 "Total vfs operations: %d maximum at one time: %d\n",
 589                 GlobalCurrentXid, GlobalMaxActiveXid);
 590
 591         i = 0;
 592         spin_lock(&cifs_tcp_ses_lock);
 593         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 594                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 595 #ifdef CONFIG_CIFS_STATS2
 596                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 597                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 598                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 599                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 600                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 601                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 602                                 atomic_read(&server->num_cmds[j]),
 603                                 server->time_per_cmd[j],
 604                                 server->fastest_cmd[j],
 605                                 server->slowest_cmd[j]);
 606                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 607                         if (atomic_read(&server->smb2slowcmd[j]))
 608                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 609                                         atomic_read(&server->smb2slowcmd[j]),
 610                                         server->hostname, j);
 611 #endif /* STATS2 */
 612                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 613                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 614                                 i++;
 615                                 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
 616                                 if (tcon->need_reconnect)
 617                                         seq_puts(m, "\tDISCONNECTED ");
 618                                 seq_printf(m, "\nSMBs: %d",
 619                                            atomic_read(&tcon->num_smbs_sent));
 620                                 if (server->ops->print_stats)
 621                                         server->ops->print_stats(m, tcon);
 622                         }
 623                 }
 624         }
 625         spin_unlock(&cifs_tcp_ses_lock);
 626
 627         seq_putc(m, '\n');
 628         return 0;
 629 }
 630
 631 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 632 {
 633         return single_open(file, cifs_stats_proc_show, NULL);
 634 }
 635
 636 static const struct proc_ops cifs_stats_proc_ops = {
 637         .proc_open      = cifs_stats_proc_open,
 638         .proc_read      = seq_read,
 639         .proc_lseek     = seq_lseek,
 640         .proc_release   = single_release,
 641         .proc_write     = cifs_stats_proc_write,
 642 };
 643
 644 #ifdef CONFIG_CIFS_SMB_DIRECT
 645 #define PROC_FILE_DEFINE(name) \
 646 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 647         size_t count, loff_t *ppos) \
 648 { \
 649         int rc; \
 650         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 651         if (rc) \
 652                 return rc; \
 653         return count; \
 654 } \
 655 static int name##_proc_show(struct seq_file *m, void *v) \
 656 { \
 657         seq_printf(m, "%d\n", name ); \
 658         return 0; \
 659 } \
 660 static int name##_open(struct inode *inode, struct file *file) \
 661 { \
 662         return single_open(file, name##_proc_show, NULL); \
 663 } \
 664 \
 665 static const struct proc_ops cifs_##name##_proc_fops = { \
 666         .proc_open      = name##_open, \
 667         .proc_read      = seq_read, \
 668         .proc_lseek     = seq_lseek, \
 669         .proc_release   = single_release, \
 670         .proc_write     = name##_write, \
 671 }
 672
 673 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 674 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 675 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 676 PROC_FILE_DEFINE(smbd_max_receive_size);
 677 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 678 PROC_FILE_DEFINE(smbd_max_send_size);
 679 PROC_FILE_DEFINE(smbd_send_credit_target);
 680 PROC_FILE_DEFINE(smbd_receive_credit_max);
 681 #endif
 682
 683 static struct proc_dir_entry *proc_fs_cifs;
 684 static const struct proc_ops cifsFYI_proc_ops;
 685 static const struct proc_ops cifs_lookup_cache_proc_ops;
 686 static const struct proc_ops traceSMB_proc_ops;
 687 static const struct proc_ops cifs_security_flags_proc_ops;
 688 static const struct proc_ops cifs_linux_ext_proc_ops;
 689 static const struct proc_ops cifs_mount_params_proc_ops;
 690
 691 void
 692 cifs_proc_init(void)
 693 {
 694         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 695         if (proc_fs_cifs == NULL)
 696                 return;
 697
 698         proc_create_single("DebugData", 0, proc_fs_cifs,
 699                         cifs_debug_data_proc_show);
 700
 701         proc_create_single("open_files", 0400, proc_fs_cifs,
 702                         cifs_debug_files_proc_show);
 703
 704         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 705         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 706         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 707         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 708                     &cifs_linux_ext_proc_ops);
 709         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 710                     &cifs_security_flags_proc_ops);
 711         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 712                     &cifs_lookup_cache_proc_ops);
 713
 714         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 715
 716 #ifdef CONFIG_CIFS_DFS_UPCALL
 717         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 718 #endif
 719
 720 #ifdef CONFIG_CIFS_SMB_DIRECT
 721         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 722                 &cifs_rdma_readwrite_threshold_proc_fops);
 723         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 724                 &cifs_smbd_max_frmr_depth_proc_fops);
 725         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 726                 &cifs_smbd_keep_alive_interval_proc_fops);
 727         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 728                 &cifs_smbd_max_receive_size_proc_fops);
 729         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 730                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 731         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 732                 &cifs_smbd_max_send_size_proc_fops);
 733         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 734                 &cifs_smbd_send_credit_target_proc_fops);
 735         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 736                 &cifs_smbd_receive_credit_max_proc_fops);
 737 #endif
 738 }
 739
 740 void
 741 cifs_proc_clean(void)
 742 {
 743         if (proc_fs_cifs == NULL)
 744                 return;
 745
 746         remove_proc_entry("DebugData", proc_fs_cifs);
 747         remove_proc_entry("open_files", proc_fs_cifs);
 748         remove_proc_entry("cifsFYI", proc_fs_cifs);
 749         remove_proc_entry("traceSMB", proc_fs_cifs);
 750         remove_proc_entry("Stats", proc_fs_cifs);
 751         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 752         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 753         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 754         remove_proc_entry("mount_params", proc_fs_cifs);
 755
 756 #ifdef CONFIG_CIFS_DFS_UPCALL
 757         remove_proc_entry("dfscache", proc_fs_cifs);
 758 #endif
 759 #ifdef CONFIG_CIFS_SMB_DIRECT
 760         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 761         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 762         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 763         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 764         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 765         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 766         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 767         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 768 #endif
 769         remove_proc_entry("fs/cifs", NULL);
 770 }
 771
 772 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 773 {
 774         seq_printf(m, "%d\n", cifsFYI);
 775         return 0;
 776 }
 777
 778 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 779 {
 780         return single_open(file, cifsFYI_proc_show, NULL);
 781 }
 782
 783 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 784                 size_t count, loff_t *ppos)
 785 {
 786         char c[2] = { '\0' };
 787         bool bv;
 788         int rc;
 789
 790         rc = get_user(c[0], buffer);
 791         if (rc)
 792                 return rc;
 793         if (kstrtobool(c, &bv) == 0)
 794                 cifsFYI = bv;
 795         else if ((c[0] > '1') && (c[0] <= '9'))
 796                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 797         else
 798                 return -EINVAL;
 799
 800         return count;
 801 }
 802
 803 static const struct proc_ops cifsFYI_proc_ops = {
 804         .proc_open      = cifsFYI_proc_open,
 805         .proc_read      = seq_read,
 806         .proc_lseek     = seq_lseek,
 807         .proc_release   = single_release,
 808         .proc_write     = cifsFYI_proc_write,
 809 };
 810
 811 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 812 {
 813         seq_printf(m, "%d\n", linuxExtEnabled);
 814         return 0;
 815 }
 816
 817 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 818 {
 819         return single_open(file, cifs_linux_ext_proc_show, NULL);
 820 }
 821
 822 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 823                 const char __user *buffer, size_t count, loff_t *ppos)
 824 {
 825         int rc;
 826
 827         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 828         if (rc)
 829                 return rc;
 830
 831         return count;
 832 }
 833
 834 static const struct proc_ops cifs_linux_ext_proc_ops = {
 835         .proc_open      = cifs_linux_ext_proc_open,
 836         .proc_read      = seq_read,
 837         .proc_lseek     = seq_lseek,
 838         .proc_release   = single_release,
 839         .proc_write     = cifs_linux_ext_proc_write,
 840 };
 841
 842 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 843 {
 844         seq_printf(m, "%d\n", lookupCacheEnabled);
 845         return 0;
 846 }
 847
 848 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 849 {
 850         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 851 }
 852
 853 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 854                 const char __user *buffer, size_t count, loff_t *ppos)
 855 {
 856         int rc;
 857
 858         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 859         if (rc)
 860                 return rc;
 861
 862         return count;
 863 }
 864
 865 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 866         .proc_open      = cifs_lookup_cache_proc_open,
 867         .proc_read      = seq_read,
 868         .proc_lseek     = seq_lseek,
 869         .proc_release   = single_release,
 870         .proc_write     = cifs_lookup_cache_proc_write,
 871 };
 872
 873 static int traceSMB_proc_show(struct seq_file *m, void *v)
 874 {
 875         seq_printf(m, "%d\n", traceSMB);
 876         return 0;
 877 }
 878
 879 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 880 {
 881         return single_open(file, traceSMB_proc_show, NULL);
 882 }
 883
 884 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 885                 size_t count, loff_t *ppos)
 886 {
 887         int rc;
 888
 889         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 890         if (rc)
 891                 return rc;
 892
 893         return count;
 894 }
 895
 896 static const struct proc_ops traceSMB_proc_ops = {
 897         .proc_open      = traceSMB_proc_open,
 898         .proc_read      = seq_read,
 899         .proc_lseek     = seq_lseek,
 900         .proc_release   = single_release,
 901         .proc_write     = traceSMB_proc_write,
 902 };
 903
 904 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 905 {
 906         seq_printf(m, "0x%x\n", global_secflags);
 907         return 0;
 908 }
 909
 910 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 911 {
 912         return single_open(file, cifs_security_flags_proc_show, NULL);
 913 }
 914
 915 /*
 916  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 917  * flags except for the ones corresponding to the given MUST flag. If there are
 918  * multiple MUST flags, then try to prefer more secure ones.
 919  */
 920 static void
 921 cifs_security_flags_handle_must_flags(unsigned int *flags)
 922 {
 923         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 924
 925         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 926                 *flags = CIFSSEC_MUST_KRB5;
 927         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 928                 *flags = CIFSSEC_MUST_NTLMSSP;
 929         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 930                 *flags = CIFSSEC_MUST_NTLMV2;
 931
 932         *flags |= signflags;
 933 }
 934
 935 static ssize_t cifs_security_flags_proc_write(struct file *file,
 936                 const char __user *buffer, size_t count, loff_t *ppos)
 937 {
 938         int rc;
 939         unsigned int flags;
 940         char flags_string[12];
 941         bool bv;
 942
 943         if ((count < 1) || (count > 11))
 944                 return -EINVAL;
 945
 946         memset(flags_string, 0, 12);
 947
 948         if (copy_from_user(flags_string, buffer, count))
 949                 return -EFAULT;
 950
 951         if (count < 3) {
 952                 /* single char or single char followed by null */
 953                 if (kstrtobool(flags_string, &bv) == 0) {
 954                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 955                         return count;
 956                 } else if (!isdigit(flags_string[0])) {
 957                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 958                                         flags_string);
 959                         return -EINVAL;
 960                 }
 961         }
 962
 963         /* else we have a number */
 964         rc = kstrtouint(flags_string, 0, &flags);
 965         if (rc) {
 966                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 967                                 flags_string);
 968                 return rc;
 969         }
 970
 971         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 972
 973         if (flags == 0)  {
 974                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 975                 return -EINVAL;
 976         }
 977
 978         if (flags & ~CIFSSEC_MASK) {
 979                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 980                          flags & ~CIFSSEC_MASK);
 981                 return -EINVAL;
 982         }
 983
 984         cifs_security_flags_handle_must_flags(&flags);
 985
 986         /* flags look ok - update the global security flags for cifs module */
 987         global_secflags = flags;
 988         if (global_secflags & CIFSSEC_MUST_SIGN) {
 989                 /* requiring signing implies signing is allowed */
 990                 global_secflags |= CIFSSEC_MAY_SIGN;
 991                 cifs_dbg(FYI, "packet signing now required\n");
 992         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 993                 cifs_dbg(FYI, "packet signing disabled\n");
 994         }
 995         /* BB should we turn on MAY flags for other MUST options? */
 996         return count;
 997 }
 998
 999 static const struct proc_ops cifs_security_flags_proc_ops = {
1000         .proc_open      = cifs_security_flags_proc_open,
1001         .proc_read      = seq_read,
1002         .proc_lseek     = seq_lseek,
1003         .proc_release   = single_release,
1004         .proc_write     = cifs_security_flags_proc_write,
1005 };
1006
1007 /* To make it easier to debug, can help to show mount params */
1008 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1009 {
1010         const struct fs_parameter_spec *p;
1011         const char *type;
1012
1013         for (p = smb3_fs_parameters; p->name; p++) {
1014                 /* cannot use switch with pointers... */
1015                 if (!p->type) {
1016                         if (p->flags == fs_param_neg_with_no)
1017                                 type = "noflag";
1018                         else
1019                                 type = "flag";
1020                 } else if (p->type == fs_param_is_bool)
1021                         type = "bool";
1022                 else if (p->type == fs_param_is_u32)
1023                         type = "u32";
1024                 else if (p->type == fs_param_is_u64)
1025                         type = "u64";
1026                 else if (p->type == fs_param_is_string)
1027                         type = "string";
1028                 else
1029                         type = "unknown";
1030
1031                 seq_printf(m, "%s:%s\n", p->name, type);
1032         }
1033
1034         return 0;
1035 }
1036
1037 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1038 {
1039         return single_open(file, cifs_mount_params_proc_show, NULL);
1040 }
1041
1042 static const struct proc_ops cifs_mount_params_proc_ops = {
1043         .proc_open      = cifs_mount_params_proc_open,
1044         .proc_read      = seq_read,
1045         .proc_lseek     = seq_lseek,
1046         .proc_release   = single_release,
1047         /* No need for write for now */
1048         /* .proc_write  = cifs_mount_params_proc_write, */
1049 };
1050
1051 #else
1052 inline void cifs_proc_init(void)
1053 {
1054 }
1055
1056 inline void cifs_proc_clean(void)
1057 {
1058 }
1059 #endif /* PROC_FS */