fs/cifs/cifs_debug.c

   1 /*
   2  *   fs/cifs_debug.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2000,2005
   5  *
   6  *   Modified by Steve French ([email protected])
   7  *
   8  *   This program is free software;  you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16  *   the GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program;  if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22 #include <linux/fs.h>
  23 #include <linux/string.h>
  24 #include <linux/ctype.h>
  25 #include <linux/module.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/uaccess.h>
  28 #include "cifspdu.h"
  29 #include "cifsglob.h"
  30 #include "cifsproto.h"
  31 #include "cifs_debug.h"
  32 #include "cifsfs.h"
  33 #ifdef CONFIG_CIFS_SMB_DIRECT
  34 #include "smbdirect.h"
  35 #endif
  36
  37 void
  38 cifs_dump_mem(char *label, void *data, int length)
  39 {
  40         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  41         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  42                        data, length, true);
  43 }
  44
  45 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  46 {
  47 #ifdef CONFIG_CIFS_DEBUG2
  48         struct smb_hdr *smb = (struct smb_hdr *)buf;
  49
  50         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  51                  smb->Command, smb->Status.CifsError,
  52                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  53         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  54                  server->ops->calc_smb_size(smb, server));
  55 #endif /* CONFIG_CIFS_DEBUG2 */
  56 }
  57
  58 void cifs_dump_mids(struct TCP_Server_Info *server)
  59 {
  60 #ifdef CONFIG_CIFS_DEBUG2
  61         struct list_head *tmp;
  62         struct mid_q_entry *mid_entry;
  63
  64         if (server == NULL)
  65                 return;
  66
  67         cifs_dbg(VFS, "Dump pending requests:\n");
  68         spin_lock(&GlobalMid_Lock);
  69         list_for_each(tmp, &server->pending_mid_q) {
  70                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  71                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  72                          mid_entry->mid_state,
  73                          le16_to_cpu(mid_entry->command),
  74                          mid_entry->pid,
  75                          mid_entry->callback_data,
  76                          mid_entry->mid);
  77 #ifdef CONFIG_CIFS_STATS2
  78                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  79                          mid_entry->large_buf,
  80                          mid_entry->resp_buf,
  81                          mid_entry->when_received,
  82                          jiffies);
  83 #endif /* STATS2 */
  84                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  85                          mid_entry->multiRsp, mid_entry->multiEnd);
  86                 if (mid_entry->resp_buf) {
  87                         cifs_dump_detail(mid_entry->resp_buf, server);
  88                         cifs_dump_mem("existing buf: ",
  89                                 mid_entry->resp_buf, 62);
  90                 }
  91         }
  92         spin_unlock(&GlobalMid_Lock);
  93 #endif /* CONFIG_CIFS_DEBUG2 */
  94 }
  95
  96 #ifdef CONFIG_PROC_FS
  97 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  98 {
  99         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 100
 101         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
 102         if (tcon->nativeFileSystem)
 103                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
 104         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
 105                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 106                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 107                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 108                    tcon->tidStatus);
 109         if (dev_type == FILE_DEVICE_DISK)
 110                 seq_puts(m, " type: DISK ");
 111         else if (dev_type == FILE_DEVICE_CD_ROM)
 112                 seq_puts(m, " type: CDROM ");
 113         else
 114                 seq_printf(m, " type: %d ", dev_type);
 115         if (tcon->seal)
 116                 seq_printf(m, " Encrypted");
 117         if (tcon->nocase)
 118                 seq_printf(m, " nocase");
 119         if (tcon->unix_ext)
 120                 seq_printf(m, " POSIX Extensions");
 121         if (tcon->ses->server->ops->dump_share_caps)
 122                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 123
 124         if (tcon->need_reconnect)
 125                 seq_puts(m, "\tDISCONNECTED ");
 126         seq_putc(m, '\n');
 127 }
 128
 129 static void
 130 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 131 {
 132         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 133         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 134
 135         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 136         seq_puts(m, "\t\tCapabilities: ");
 137         if (iface->rdma_capable)
 138                 seq_puts(m, "rdma ");
 139         if (iface->rss_capable)
 140                 seq_puts(m, "rss ");
 141         seq_putc(m, '\n');
 142         if (iface->sockaddr.ss_family == AF_INET)
 143                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 144         else if (iface->sockaddr.ss_family == AF_INET6)
 145                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 146 }
 147
 148 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 149 {
 150         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 151         struct TCP_Server_Info *server;
 152         struct cifs_ses *ses;
 153         struct cifs_tcon *tcon;
 154         struct cifsFileInfo *cfile;
 155
 156         seq_puts(m, "# Version:1\n");
 157         seq_puts(m, "# Format:\n");
 158         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 159 #ifdef CONFIG_CIFS_DEBUG2
 160         seq_printf(m, " <filename> <mid>\n");
 161 #else
 162         seq_printf(m, " <filename>\n");
 163 #endif /* CIFS_DEBUG2 */
 164         spin_lock(&cifs_tcp_ses_lock);
 165         list_for_each(stmp, &cifs_tcp_ses_list) {
 166                 server = list_entry(stmp, struct TCP_Server_Info,
 167                                     tcp_ses_list);
 168                 list_for_each(tmp, &server->smb_ses_list) {
 169                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 170                         list_for_each(tmp1, &ses->tcon_list) {
 171                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 172                                 spin_lock(&tcon->open_file_lock);
 173                                 list_for_each(tmp2, &tcon->openFileList) {
 174                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 175                                                      tlist);
 176                                         seq_printf(m,
 177                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 178                                                 tcon->tid,
 179                                                 cfile->fid.persistent_fid,
 180                                                 cfile->f_flags,
 181                                                 cfile->count,
 182                                                 cfile->pid,
 183                                                 from_kuid(&init_user_ns, cfile->uid),
 184                                                 cfile->dentry->d_name.name);
 185 #ifdef CONFIG_CIFS_DEBUG2
 186                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 187 #else
 188                                         seq_printf(m, "\n");
 189 #endif /* CIFS_DEBUG2 */
 190                                 }
 191                                 spin_unlock(&tcon->open_file_lock);
 192                         }
 193                 }
 194         }
 195         spin_unlock(&cifs_tcp_ses_lock);
 196         seq_putc(m, '\n');
 197         return 0;
 198 }
 199
 200 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 201 {
 202         struct list_head *tmp1, *tmp2, *tmp3;
 203         struct mid_q_entry *mid_entry;
 204         struct TCP_Server_Info *server;
 205         struct cifs_ses *ses;
 206         struct cifs_tcon *tcon;
 207         int i, j;
 208
 209         seq_puts(m,
 210                     "Display Internal CIFS Data Structures for Debugging\n"
 211                     "---------------------------------------------------\n");
 212         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 213         seq_printf(m, "Features:");
 214 #ifdef CONFIG_CIFS_DFS_UPCALL
 215         seq_printf(m, " DFS");
 216 #endif
 217 #ifdef CONFIG_CIFS_FSCACHE
 218         seq_printf(m, ",FSCACHE");
 219 #endif
 220 #ifdef CONFIG_CIFS_SMB_DIRECT
 221         seq_printf(m, ",SMB_DIRECT");
 222 #endif
 223 #ifdef CONFIG_CIFS_STATS2
 224         seq_printf(m, ",STATS2");
 225 #else
 226         seq_printf(m, ",STATS");
 227 #endif
 228 #ifdef CONFIG_CIFS_DEBUG2
 229         seq_printf(m, ",DEBUG2");
 230 #elif defined(CONFIG_CIFS_DEBUG)
 231         seq_printf(m, ",DEBUG");
 232 #endif
 233 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 234         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 235 #endif
 236 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 237         seq_printf(m, ",WEAK_PW_HASH");
 238 #endif
 239 #ifdef CONFIG_CIFS_POSIX
 240         seq_printf(m, ",CIFS_POSIX");
 241 #endif
 242 #ifdef CONFIG_CIFS_UPCALL
 243         seq_printf(m, ",UPCALL(SPNEGO)");
 244 #endif
 245 #ifdef CONFIG_CIFS_XATTR
 246         seq_printf(m, ",XATTR");
 247 #endif
 248 #ifdef CONFIG_CIFS_ACL
 249         seq_printf(m, ",ACL");
 250 #endif
 251         seq_putc(m, '\n');
 252         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 253         seq_printf(m, "Servers:");
 254
 255         i = 0;
 256         spin_lock(&cifs_tcp_ses_lock);
 257         list_for_each(tmp1, &cifs_tcp_ses_list) {
 258                 server = list_entry(tmp1, struct TCP_Server_Info,
 259                                     tcp_ses_list);
 260
 261 #ifdef CONFIG_CIFS_SMB_DIRECT
 262                 if (!server->rdma)
 263                         goto skip_rdma;
 264
 265                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 266                         "transport status: %x",
 267                         server->smbd_conn->protocol,
 268                         server->smbd_conn->transport_status);
 269                 seq_printf(m, "\nConn receive_credit_max: %x "
 270                         "send_credit_target: %x max_send_size: %x",
 271                         server->smbd_conn->receive_credit_max,
 272                         server->smbd_conn->send_credit_target,
 273                         server->smbd_conn->max_send_size);
 274                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 275                         "max_fragmented_send_size: %x max_receive_size:%x",
 276                         server->smbd_conn->max_fragmented_recv_size,
 277                         server->smbd_conn->max_fragmented_send_size,
 278                         server->smbd_conn->max_receive_size);
 279                 seq_printf(m, "\nConn keep_alive_interval: %x "
 280                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 281                         server->smbd_conn->keep_alive_interval,
 282                         server->smbd_conn->max_readwrite_size,
 283                         server->smbd_conn->rdma_readwrite_threshold);
 284                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 285                         "count_put_receive_buffer: %x count_send_empty: %x",
 286                         server->smbd_conn->count_get_receive_buffer,
 287                         server->smbd_conn->count_put_receive_buffer,
 288                         server->smbd_conn->count_send_empty);
 289                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 290                         "count_enqueue_reassembly_queue: %x "
 291                         "count_dequeue_reassembly_queue: %x "
 292                         "fragment_reassembly_remaining: %x "
 293                         "reassembly_data_length: %x "
 294                         "reassembly_queue_length: %x",
 295                         server->smbd_conn->count_reassembly_queue,
 296                         server->smbd_conn->count_enqueue_reassembly_queue,
 297                         server->smbd_conn->count_dequeue_reassembly_queue,
 298                         server->smbd_conn->fragment_reassembly_remaining,
 299                         server->smbd_conn->reassembly_data_length,
 300                         server->smbd_conn->reassembly_queue_length);
 301                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 302                         "receive_credits: %x receive_credit_target: %x",
 303                         atomic_read(&server->smbd_conn->send_credits),
 304                         atomic_read(&server->smbd_conn->receive_credits),
 305                         server->smbd_conn->receive_credit_target);
 306                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 307                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 308                         atomic_read(&server->smbd_conn->send_pending),
 309                         atomic_read(&server->smbd_conn->send_payload_pending),
 310                         server->smbd_conn->smbd_send_pending,
 311                         server->smbd_conn->smbd_recv_pending);
 312                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 313                         "count_empty_packet_queue: %x",
 314                         server->smbd_conn->count_receive_queue,
 315                         server->smbd_conn->count_empty_packet_queue);
 316                 seq_printf(m, "\nMR responder_resources: %x "
 317                         "max_frmr_depth: %x mr_type: %x",
 318                         server->smbd_conn->responder_resources,
 319                         server->smbd_conn->max_frmr_depth,
 320                         server->smbd_conn->mr_type);
 321                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 322                         atomic_read(&server->smbd_conn->mr_ready_count),
 323                         atomic_read(&server->smbd_conn->mr_used_count));
 324 skip_rdma:
 325 #endif
 326                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 327                         server->credits,  server->dialect);
 328                 if (server->sign)
 329                         seq_printf(m, " signed");
 330                 if (server->posix_ext_supported)
 331                         seq_printf(m, " posix");
 332
 333                 i++;
 334                 list_for_each(tmp2, &server->smb_ses_list) {
 335                         ses = list_entry(tmp2, struct cifs_ses,
 336                                          smb_ses_list);
 337                         if ((ses->serverDomain == NULL) ||
 338                                 (ses->serverOS == NULL) ||
 339                                 (ses->serverNOS == NULL)) {
 340                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 341                                         i, ses->serverName, ses->ses_count,
 342                                         ses->capabilities, ses->status);
 343                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 344                                         seq_printf(m, "Guest\t");
 345                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 346                                         seq_printf(m, "Anonymous\t");
 347                         } else {
 348                                 seq_printf(m,
 349                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 350                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 351                                     " session status: %d ",
 352                                 i, ses->serverName, ses->serverDomain,
 353                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 354                                 ses->capabilities, ses->status);
 355                         }
 356                         if (server->rdma)
 357                                 seq_printf(m, "RDMA\n\t");
 358                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 359                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 360                                    server->tcpStatus,
 361                                    server->reconnect_instance,
 362                                    server->srv_count,
 363                                    server->sec_mode, in_flight(server));
 364
 365 #ifdef CONFIG_CIFS_STATS2
 366                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 367                                 atomic_read(&server->in_send),
 368                                 atomic_read(&server->num_waiters));
 369 #endif
 370
 371                         seq_puts(m, "\n\tShares:");
 372                         j = 0;
 373
 374                         seq_printf(m, "\n\t%d) IPC: ", j);
 375                         if (ses->tcon_ipc)
 376                                 cifs_debug_tcon(m, ses->tcon_ipc);
 377                         else
 378                                 seq_puts(m, "none\n");
 379
 380                         list_for_each(tmp3, &ses->tcon_list) {
 381                                 tcon = list_entry(tmp3, struct cifs_tcon,
 382                                                   tcon_list);
 383                                 ++j;
 384                                 seq_printf(m, "\n\t%d) ", j);
 385                                 cifs_debug_tcon(m, tcon);
 386                         }
 387
 388                         seq_puts(m, "\n\tMIDs:\n");
 389
 390                         spin_lock(&GlobalMid_Lock);
 391                         list_for_each(tmp3, &server->pending_mid_q) {
 392                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 393                                         qhead);
 394                                 seq_printf(m, "\tState: %d com: %d pid:"
 395                                               " %d cbdata: %p mid %llu\n",
 396                                               mid_entry->mid_state,
 397                                               le16_to_cpu(mid_entry->command),
 398                                               mid_entry->pid,
 399                                               mid_entry->callback_data,
 400                                               mid_entry->mid);
 401                         }
 402                         spin_unlock(&GlobalMid_Lock);
 403
 404                         spin_lock(&ses->iface_lock);
 405                         if (ses->iface_count)
 406                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 407                                            ses->iface_count);
 408                         for (j = 0; j < ses->iface_count; j++) {
 409                                 seq_printf(m, "\t%d)", j);
 410                                 cifs_dump_iface(m, &ses->iface_list[j]);
 411                         }
 412                         spin_unlock(&ses->iface_lock);
 413                 }
 414         }
 415         spin_unlock(&cifs_tcp_ses_lock);
 416         seq_putc(m, '\n');
 417
 418         /* BB add code to dump additional info such as TCP session info now */
 419         return 0;
 420 }
 421
 422 static ssize_t cifs_stats_proc_write(struct file *file,
 423                 const char __user *buffer, size_t count, loff_t *ppos)
 424 {
 425         bool bv;
 426         int rc;
 427         struct list_head *tmp1, *tmp2, *tmp3;
 428         struct TCP_Server_Info *server;
 429         struct cifs_ses *ses;
 430         struct cifs_tcon *tcon;
 431
 432         rc = kstrtobool_from_user(buffer, count, &bv);
 433         if (rc == 0) {
 434 #ifdef CONFIG_CIFS_STATS2
 435                 int i;
 436
 437                 atomic_set(&totBufAllocCount, 0);
 438                 atomic_set(&totSmBufAllocCount, 0);
 439 #endif /* CONFIG_CIFS_STATS2 */
 440                 atomic_set(&tcpSesReconnectCount, 0);
 441                 atomic_set(&tconInfoReconnectCount, 0);
 442
 443                 spin_lock(&GlobalMid_Lock);
 444                 GlobalMaxActiveXid = 0;
 445                 GlobalCurrentXid = 0;
 446                 spin_unlock(&GlobalMid_Lock);
 447                 spin_lock(&cifs_tcp_ses_lock);
 448                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 449                         server = list_entry(tmp1, struct TCP_Server_Info,
 450                                             tcp_ses_list);
 451 #ifdef CONFIG_CIFS_STATS2
 452                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
 453                                 atomic_set(&server->smb2slowcmd[i], 0);
 454 #endif /* CONFIG_CIFS_STATS2 */
 455                         list_for_each(tmp2, &server->smb_ses_list) {
 456                                 ses = list_entry(tmp2, struct cifs_ses,
 457                                                  smb_ses_list);
 458                                 list_for_each(tmp3, &ses->tcon_list) {
 459                                         tcon = list_entry(tmp3,
 460                                                           struct cifs_tcon,
 461                                                           tcon_list);
 462                                         atomic_set(&tcon->num_smbs_sent, 0);
 463                                         spin_lock(&tcon->stat_lock);
 464                                         tcon->bytes_read = 0;
 465                                         tcon->bytes_written = 0;
 466                                         spin_unlock(&tcon->stat_lock);
 467                                         if (server->ops->clear_stats)
 468                                                 server->ops->clear_stats(tcon);
 469                                 }
 470                         }
 471                 }
 472                 spin_unlock(&cifs_tcp_ses_lock);
 473         } else {
 474                 return rc;
 475         }
 476
 477         return count;
 478 }
 479
 480 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 481 {
 482         int i;
 483 #ifdef CONFIG_CIFS_STATS2
 484         int j;
 485 #endif /* STATS2 */
 486         struct list_head *tmp1, *tmp2, *tmp3;
 487         struct TCP_Server_Info *server;
 488         struct cifs_ses *ses;
 489         struct cifs_tcon *tcon;
 490
 491         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 492                         sesInfoAllocCount.counter);
 493         seq_printf(m, "Share (unique mount targets): %d\n",
 494                         tconInfoAllocCount.counter);
 495         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 496                         bufAllocCount.counter,
 497                         cifs_min_rcv + tcpSesAllocCount.counter);
 498         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 499                         smBufAllocCount.counter, cifs_min_small);
 500 #ifdef CONFIG_CIFS_STATS2
 501         seq_printf(m, "Total Large %d Small %d Allocations\n",
 502                                 atomic_read(&totBufAllocCount),
 503                                 atomic_read(&totSmBufAllocCount));
 504 #endif /* CONFIG_CIFS_STATS2 */
 505
 506         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 507         seq_printf(m,
 508                 "\n%d session %d share reconnects\n",
 509                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 510
 511         seq_printf(m,
 512                 "Total vfs operations: %d maximum at one time: %d\n",
 513                 GlobalCurrentXid, GlobalMaxActiveXid);
 514
 515         i = 0;
 516         spin_lock(&cifs_tcp_ses_lock);
 517         list_for_each(tmp1, &cifs_tcp_ses_list) {
 518                 server = list_entry(tmp1, struct TCP_Server_Info,
 519                                     tcp_ses_list);
 520 #ifdef CONFIG_CIFS_STATS2
 521                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 522                         if (atomic_read(&server->smb2slowcmd[j]))
 523                                 seq_printf(m, "%d slow responses from %s for command %d\n",
 524                                         atomic_read(&server->smb2slowcmd[j]),
 525                                         server->hostname, j);
 526 #endif /* STATS2 */
 527                 list_for_each(tmp2, &server->smb_ses_list) {
 528                         ses = list_entry(tmp2, struct cifs_ses,
 529                                          smb_ses_list);
 530                         list_for_each(tmp3, &ses->tcon_list) {
 531                                 tcon = list_entry(tmp3,
 532                                                   struct cifs_tcon,
 533                                                   tcon_list);
 534                                 i++;
 535                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 536                                 if (tcon->need_reconnect)
 537                                         seq_puts(m, "\tDISCONNECTED ");
 538                                 seq_printf(m, "\nSMBs: %d",
 539                                            atomic_read(&tcon->num_smbs_sent));
 540                                 if (server->ops->print_stats)
 541                                         server->ops->print_stats(m, tcon);
 542                         }
 543                 }
 544         }
 545         spin_unlock(&cifs_tcp_ses_lock);
 546
 547         seq_putc(m, '\n');
 548         return 0;
 549 }
 550
 551 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 552 {
 553         return single_open(file, cifs_stats_proc_show, NULL);
 554 }
 555
 556 static const struct file_operations cifs_stats_proc_fops = {
 557         .open           = cifs_stats_proc_open,
 558         .read           = seq_read,
 559         .llseek         = seq_lseek,
 560         .release        = single_release,
 561         .write          = cifs_stats_proc_write,
 562 };
 563
 564 #ifdef CONFIG_CIFS_SMB_DIRECT
 565 #define PROC_FILE_DEFINE(name) \
 566 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 567         size_t count, loff_t *ppos) \
 568 { \
 569         int rc; \
 570         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 571         if (rc) \
 572                 return rc; \
 573         return count; \
 574 } \
 575 static int name##_proc_show(struct seq_file *m, void *v) \
 576 { \
 577         seq_printf(m, "%d\n", name ); \
 578         return 0; \
 579 } \
 580 static int name##_open(struct inode *inode, struct file *file) \
 581 { \
 582         return single_open(file, name##_proc_show, NULL); \
 583 } \
 584 \
 585 static const struct file_operations cifs_##name##_proc_fops = { \
 586         .open           = name##_open, \
 587         .read           = seq_read, \
 588         .llseek         = seq_lseek, \
 589         .release        = single_release, \
 590         .write          = name##_write, \
 591 }
 592
 593 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 594 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 595 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 596 PROC_FILE_DEFINE(smbd_max_receive_size);
 597 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 598 PROC_FILE_DEFINE(smbd_max_send_size);
 599 PROC_FILE_DEFINE(smbd_send_credit_target);
 600 PROC_FILE_DEFINE(smbd_receive_credit_max);
 601 #endif
 602
 603 static struct proc_dir_entry *proc_fs_cifs;
 604 static const struct file_operations cifsFYI_proc_fops;
 605 static const struct file_operations cifs_lookup_cache_proc_fops;
 606 static const struct file_operations traceSMB_proc_fops;
 607 static const struct file_operations cifs_security_flags_proc_fops;
 608 static const struct file_operations cifs_linux_ext_proc_fops;
 609
 610 void
 611 cifs_proc_init(void)
 612 {
 613         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 614         if (proc_fs_cifs == NULL)
 615                 return;
 616
 617         proc_create_single("DebugData", 0, proc_fs_cifs,
 618                         cifs_debug_data_proc_show);
 619
 620         proc_create_single("open_files", 0400, proc_fs_cifs,
 621                         cifs_debug_files_proc_show);
 622
 623         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 624         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 625         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 626         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 627                     &cifs_linux_ext_proc_fops);
 628         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 629                     &cifs_security_flags_proc_fops);
 630         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 631                     &cifs_lookup_cache_proc_fops);
 632 #ifdef CONFIG_CIFS_SMB_DIRECT
 633         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 634                 &cifs_rdma_readwrite_threshold_proc_fops);
 635         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 636                 &cifs_smbd_max_frmr_depth_proc_fops);
 637         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 638                 &cifs_smbd_keep_alive_interval_proc_fops);
 639         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 640                 &cifs_smbd_max_receive_size_proc_fops);
 641         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 642                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 643         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 644                 &cifs_smbd_max_send_size_proc_fops);
 645         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 646                 &cifs_smbd_send_credit_target_proc_fops);
 647         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 648                 &cifs_smbd_receive_credit_max_proc_fops);
 649 #endif
 650 }
 651
 652 void
 653 cifs_proc_clean(void)
 654 {
 655         if (proc_fs_cifs == NULL)
 656                 return;
 657
 658         remove_proc_entry("DebugData", proc_fs_cifs);
 659         remove_proc_entry("open_files", proc_fs_cifs);
 660         remove_proc_entry("cifsFYI", proc_fs_cifs);
 661         remove_proc_entry("traceSMB", proc_fs_cifs);
 662         remove_proc_entry("Stats", proc_fs_cifs);
 663         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 664         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 665         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 666 #ifdef CONFIG_CIFS_SMB_DIRECT
 667         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 668         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 669         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 670         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 671         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 672         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 673         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 674         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 675 #endif
 676         remove_proc_entry("fs/cifs", NULL);
 677 }
 678
 679 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 680 {
 681         seq_printf(m, "%d\n", cifsFYI);
 682         return 0;
 683 }
 684
 685 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 686 {
 687         return single_open(file, cifsFYI_proc_show, NULL);
 688 }
 689
 690 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 691                 size_t count, loff_t *ppos)
 692 {
 693         char c[2] = { '\0' };
 694         bool bv;
 695         int rc;
 696
 697         rc = get_user(c[0], buffer);
 698         if (rc)
 699                 return rc;
 700         if (strtobool(c, &bv) == 0)
 701                 cifsFYI = bv;
 702         else if ((c[0] > '1') && (c[0] <= '9'))
 703                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 704         else
 705                 return -EINVAL;
 706
 707         return count;
 708 }
 709
 710 static const struct file_operations cifsFYI_proc_fops = {
 711         .open           = cifsFYI_proc_open,
 712         .read           = seq_read,
 713         .llseek         = seq_lseek,
 714         .release        = single_release,
 715         .write          = cifsFYI_proc_write,
 716 };
 717
 718 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 719 {
 720         seq_printf(m, "%d\n", linuxExtEnabled);
 721         return 0;
 722 }
 723
 724 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 725 {
 726         return single_open(file, cifs_linux_ext_proc_show, NULL);
 727 }
 728
 729 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 730                 const char __user *buffer, size_t count, loff_t *ppos)
 731 {
 732         int rc;
 733
 734         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 735         if (rc)
 736                 return rc;
 737
 738         return count;
 739 }
 740
 741 static const struct file_operations cifs_linux_ext_proc_fops = {
 742         .open           = cifs_linux_ext_proc_open,
 743         .read           = seq_read,
 744         .llseek         = seq_lseek,
 745         .release        = single_release,
 746         .write          = cifs_linux_ext_proc_write,
 747 };
 748
 749 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 750 {
 751         seq_printf(m, "%d\n", lookupCacheEnabled);
 752         return 0;
 753 }
 754
 755 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 756 {
 757         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 758 }
 759
 760 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 761                 const char __user *buffer, size_t count, loff_t *ppos)
 762 {
 763         int rc;
 764
 765         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 766         if (rc)
 767                 return rc;
 768
 769         return count;
 770 }
 771
 772 static const struct file_operations cifs_lookup_cache_proc_fops = {
 773         .open           = cifs_lookup_cache_proc_open,
 774         .read           = seq_read,
 775         .llseek         = seq_lseek,
 776         .release        = single_release,
 777         .write          = cifs_lookup_cache_proc_write,
 778 };
 779
 780 static int traceSMB_proc_show(struct seq_file *m, void *v)
 781 {
 782         seq_printf(m, "%d\n", traceSMB);
 783         return 0;
 784 }
 785
 786 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 787 {
 788         return single_open(file, traceSMB_proc_show, NULL);
 789 }
 790
 791 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 792                 size_t count, loff_t *ppos)
 793 {
 794         int rc;
 795
 796         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 797         if (rc)
 798                 return rc;
 799
 800         return count;
 801 }
 802
 803 static const struct file_operations traceSMB_proc_fops = {
 804         .open           = traceSMB_proc_open,
 805         .read           = seq_read,
 806         .llseek         = seq_lseek,
 807         .release        = single_release,
 808         .write          = traceSMB_proc_write,
 809 };
 810
 811 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 812 {
 813         seq_printf(m, "0x%x\n", global_secflags);
 814         return 0;
 815 }
 816
 817 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 818 {
 819         return single_open(file, cifs_security_flags_proc_show, NULL);
 820 }
 821
 822 /*
 823  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 824  * flags except for the ones corresponding to the given MUST flag. If there are
 825  * multiple MUST flags, then try to prefer more secure ones.
 826  */
 827 static void
 828 cifs_security_flags_handle_must_flags(unsigned int *flags)
 829 {
 830         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 831
 832         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 833                 *flags = CIFSSEC_MUST_KRB5;
 834         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 835                 *flags = CIFSSEC_MUST_NTLMSSP;
 836         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 837                 *flags = CIFSSEC_MUST_NTLMV2;
 838         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 839                 *flags = CIFSSEC_MUST_NTLM;
 840         else if (CIFSSEC_MUST_LANMAN &&
 841                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 842                 *flags = CIFSSEC_MUST_LANMAN;
 843         else if (CIFSSEC_MUST_PLNTXT &&
 844                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 845                 *flags = CIFSSEC_MUST_PLNTXT;
 846
 847         *flags |= signflags;
 848 }
 849
 850 static ssize_t cifs_security_flags_proc_write(struct file *file,
 851                 const char __user *buffer, size_t count, loff_t *ppos)
 852 {
 853         int rc;
 854         unsigned int flags;
 855         char flags_string[12];
 856         bool bv;
 857
 858         if ((count < 1) || (count > 11))
 859                 return -EINVAL;
 860
 861         memset(flags_string, 0, 12);
 862
 863         if (copy_from_user(flags_string, buffer, count))
 864                 return -EFAULT;
 865
 866         if (count < 3) {
 867                 /* single char or single char followed by null */
 868                 if (strtobool(flags_string, &bv) == 0) {
 869                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 870                         return count;
 871                 } else if (!isdigit(flags_string[0])) {
 872                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 873                                         flags_string);
 874                         return -EINVAL;
 875                 }
 876         }
 877
 878         /* else we have a number */
 879         rc = kstrtouint(flags_string, 0, &flags);
 880         if (rc) {
 881                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 882                                 flags_string);
 883                 return rc;
 884         }
 885
 886         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 887
 888         if (flags == 0)  {
 889                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 890                 return -EINVAL;
 891         }
 892
 893         if (flags & ~CIFSSEC_MASK) {
 894                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 895                          flags & ~CIFSSEC_MASK);
 896                 return -EINVAL;
 897         }
 898
 899         cifs_security_flags_handle_must_flags(&flags);
 900
 901         /* flags look ok - update the global security flags for cifs module */
 902         global_secflags = flags;
 903         if (global_secflags & CIFSSEC_MUST_SIGN) {
 904                 /* requiring signing implies signing is allowed */
 905                 global_secflags |= CIFSSEC_MAY_SIGN;
 906                 cifs_dbg(FYI, "packet signing now required\n");
 907         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 908                 cifs_dbg(FYI, "packet signing disabled\n");
 909         }
 910         /* BB should we turn on MAY flags for other MUST options? */
 911         return count;
 912 }
 913
 914 static const struct file_operations cifs_security_flags_proc_fops = {
 915         .open           = cifs_security_flags_proc_open,
 916         .read           = seq_read,
 917         .llseek         = seq_lseek,
 918         .release        = single_release,
 919         .write          = cifs_security_flags_proc_write,
 920 };
 921 #else
 922 inline void cifs_proc_init(void)
 923 {
 924 }
 925
 926 inline void cifs_proc_clean(void)
 927 {
 928 }
 929 #endif /* PROC_FS */