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 (sfrench@us.ibm.com)
   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_DFS_UPCALL
  34 #include "dfs_cache.h"
  35 #endif
  36 #ifdef CONFIG_CIFS_SMB_DIRECT
  37 #include "smbdirect.h"
  38 #endif
  39
  40 void
  41 cifs_dump_mem(char *label, void *data, int length)
  42 {
  43         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  44         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  45                        data, length, true);
  46 }
  47
  48 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  49 {
  50 #ifdef CONFIG_CIFS_DEBUG2
  51         struct smb_hdr *smb = (struct smb_hdr *)buf;
  52
  53         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  54                  smb->Command, smb->Status.CifsError,
  55                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  56         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  57                  server->ops->calc_smb_size(smb, server));
  58 #endif /* CONFIG_CIFS_DEBUG2 */
  59 }
  60
  61 void cifs_dump_mids(struct TCP_Server_Info *server)
  62 {
  63 #ifdef CONFIG_CIFS_DEBUG2
  64         struct list_head *tmp;
  65         struct mid_q_entry *mid_entry;
  66
  67         if (server == NULL)
  68                 return;
  69
  70         cifs_dbg(VFS, "Dump pending requests:\n");
  71         spin_lock(&GlobalMid_Lock);
  72         list_for_each(tmp, &server->pending_mid_q) {
  73                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  74                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  75                          mid_entry->mid_state,
  76                          le16_to_cpu(mid_entry->command),
  77                          mid_entry->pid,
  78                          mid_entry->callback_data,
  79                          mid_entry->mid);
  80 #ifdef CONFIG_CIFS_STATS2
  81                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  82                          mid_entry->large_buf,
  83                          mid_entry->resp_buf,
  84                          mid_entry->when_received,
  85                          jiffies);
  86 #endif /* STATS2 */
  87                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  88                          mid_entry->multiRsp, mid_entry->multiEnd);
  89                 if (mid_entry->resp_buf) {
  90                         cifs_dump_detail(mid_entry->resp_buf, server);
  91                         cifs_dump_mem("existing buf: ",
  92                                 mid_entry->resp_buf, 62);
  93                 }
  94         }
  95         spin_unlock(&GlobalMid_Lock);
  96 #endif /* CONFIG_CIFS_DEBUG2 */
  97 }
  98
  99 #ifdef CONFIG_PROC_FS
 100 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
 101 {
 102         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 103
 104         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
 105         if (tcon->nativeFileSystem)
 106                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
 107         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
 108                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 109                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 110                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 111                    tcon->tidStatus);
 112         if (dev_type == FILE_DEVICE_DISK)
 113                 seq_puts(m, " type: DISK ");
 114         else if (dev_type == FILE_DEVICE_CD_ROM)
 115                 seq_puts(m, " type: CDROM ");
 116         else
 117                 seq_printf(m, " type: %d ", dev_type);
 118         if ((tcon->seal) ||
 119             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 120             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 121                 seq_printf(m, " Encrypted");
 122         if (tcon->nocase)
 123                 seq_printf(m, " nocase");
 124         if (tcon->unix_ext)
 125                 seq_printf(m, " POSIX Extensions");
 126         if (tcon->ses->server->ops->dump_share_caps)
 127                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 128
 129         if (tcon->need_reconnect)
 130                 seq_puts(m, "\tDISCONNECTED ");
 131         seq_putc(m, '\n');
 132 }
 133
 134 static void
 135 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 136 {
 137         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 138         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 139
 140         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 141         seq_puts(m, "\t\tCapabilities: ");
 142         if (iface->rdma_capable)
 143                 seq_puts(m, "rdma ");
 144         if (iface->rss_capable)
 145                 seq_puts(m, "rss ");
 146         seq_putc(m, '\n');
 147         if (iface->sockaddr.ss_family == AF_INET)
 148                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 149         else if (iface->sockaddr.ss_family == AF_INET6)
 150                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 151 }
 152
 153 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 154 {
 155         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 156         struct TCP_Server_Info *server;
 157         struct cifs_ses *ses;
 158         struct cifs_tcon *tcon;
 159         struct cifsFileInfo *cfile;
 160
 161         seq_puts(m, "# Version:1\n");
 162         seq_puts(m, "# Format:\n");
 163         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 164 #ifdef CONFIG_CIFS_DEBUG2
 165         seq_printf(m, " <filename> <mid>\n");
 166 #else
 167         seq_printf(m, " <filename>\n");
 168 #endif /* CIFS_DEBUG2 */
 169         spin_lock(&cifs_tcp_ses_lock);
 170         list_for_each(stmp, &cifs_tcp_ses_list) {
 171                 server = list_entry(stmp, struct TCP_Server_Info,
 172                                     tcp_ses_list);
 173                 list_for_each(tmp, &server->smb_ses_list) {
 174                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 175                         list_for_each(tmp1, &ses->tcon_list) {
 176                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 177                                 spin_lock(&tcon->open_file_lock);
 178                                 list_for_each(tmp2, &tcon->openFileList) {
 179                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 180                                                      tlist);
 181                                         seq_printf(m,
 182                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 183                                                 tcon->tid,
 184                                                 cfile->fid.persistent_fid,
 185                                                 cfile->f_flags,
 186                                                 cfile->count,
 187                                                 cfile->pid,
 188                                                 from_kuid(&init_user_ns, cfile->uid),
 189                                                 cfile->dentry->d_name.name);
 190 #ifdef CONFIG_CIFS_DEBUG2
 191                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 192 #else
 193                                         seq_printf(m, "\n");
 194 #endif /* CIFS_DEBUG2 */
 195                                 }
 196                                 spin_unlock(&tcon->open_file_lock);
 197                         }
 198                 }
 199         }
 200         spin_unlock(&cifs_tcp_ses_lock);
 201         seq_putc(m, '\n');
 202         return 0;
 203 }
 204
 205 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 206 {
 207         struct list_head *tmp1, *tmp2, *tmp3;
 208         struct mid_q_entry *mid_entry;
 209         struct TCP_Server_Info *server;
 210         struct cifs_ses *ses;
 211         struct cifs_tcon *tcon;
 212         int i, j;
 213
 214         seq_puts(m,
 215                     "Display Internal CIFS Data Structures for Debugging\n"
 216                     "---------------------------------------------------\n");
 217         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 218         seq_printf(m, "Features:");
 219 #ifdef CONFIG_CIFS_DFS_UPCALL
 220         seq_printf(m, " DFS");
 221 #endif
 222 #ifdef CONFIG_CIFS_FSCACHE
 223         seq_printf(m, ",FSCACHE");
 224 #endif
 225 #ifdef CONFIG_CIFS_SMB_DIRECT
 226         seq_printf(m, ",SMB_DIRECT");
 227 #endif
 228 #ifdef CONFIG_CIFS_STATS2
 229         seq_printf(m, ",STATS2");
 230 #else
 231         seq_printf(m, ",STATS");
 232 #endif
 233 #ifdef CONFIG_CIFS_DEBUG2
 234         seq_printf(m, ",DEBUG2");
 235 #elif defined(CONFIG_CIFS_DEBUG)
 236         seq_printf(m, ",DEBUG");
 237 #endif
 238 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 239         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 240 #endif
 241 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 242         seq_printf(m, ",WEAK_PW_HASH");
 243 #endif
 244 #ifdef CONFIG_CIFS_POSIX
 245         seq_printf(m, ",CIFS_POSIX");
 246 #endif
 247 #ifdef CONFIG_CIFS_UPCALL
 248         seq_printf(m, ",UPCALL(SPNEGO)");
 249 #endif
 250 #ifdef CONFIG_CIFS_XATTR
 251         seq_printf(m, ",XATTR");
 252 #endif
 253 #ifdef CONFIG_CIFS_ACL
 254         seq_printf(m, ",ACL");
 255 #endif
 256         seq_putc(m, '\n');
 257         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 258         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 259         seq_printf(m, "Servers:");
 260
 261         i = 0;
 262         spin_lock(&cifs_tcp_ses_lock);
 263         list_for_each(tmp1, &cifs_tcp_ses_list) {
 264                 server = list_entry(tmp1, struct TCP_Server_Info,
 265                                     tcp_ses_list);
 266
 267 #ifdef CONFIG_CIFS_SMB_DIRECT
 268                 if (!server->rdma)
 269                         goto skip_rdma;
 270
 271                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 272                         "transport status: %x",
 273                         server->smbd_conn->protocol,
 274                         server->smbd_conn->transport_status);
 275                 seq_printf(m, "\nConn receive_credit_max: %x "
 276                         "send_credit_target: %x max_send_size: %x",
 277                         server->smbd_conn->receive_credit_max,
 278                         server->smbd_conn->send_credit_target,
 279                         server->smbd_conn->max_send_size);
 280                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 281                         "max_fragmented_send_size: %x max_receive_size:%x",
 282                         server->smbd_conn->max_fragmented_recv_size,
 283                         server->smbd_conn->max_fragmented_send_size,
 284                         server->smbd_conn->max_receive_size);
 285                 seq_printf(m, "\nConn keep_alive_interval: %x "
 286                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 287                         server->smbd_conn->keep_alive_interval,
 288                         server->smbd_conn->max_readwrite_size,
 289                         server->smbd_conn->rdma_readwrite_threshold);
 290                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 291                         "count_put_receive_buffer: %x count_send_empty: %x",
 292                         server->smbd_conn->count_get_receive_buffer,
 293                         server->smbd_conn->count_put_receive_buffer,
 294                         server->smbd_conn->count_send_empty);
 295                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 296                         "count_enqueue_reassembly_queue: %x "
 297                         "count_dequeue_reassembly_queue: %x "
 298                         "fragment_reassembly_remaining: %x "
 299                         "reassembly_data_length: %x "
 300                         "reassembly_queue_length: %x",
 301                         server->smbd_conn->count_reassembly_queue,
 302                         server->smbd_conn->count_enqueue_reassembly_queue,
 303                         server->smbd_conn->count_dequeue_reassembly_queue,
 304                         server->smbd_conn->fragment_reassembly_remaining,
 305                         server->smbd_conn->reassembly_data_length,
 306                         server->smbd_conn->reassembly_queue_length);
 307                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 308                         "receive_credits: %x receive_credit_target: %x",
 309                         atomic_read(&server->smbd_conn->send_credits),
 310                         atomic_read(&server->smbd_conn->receive_credits),
 311                         server->smbd_conn->receive_credit_target);
 312                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 313                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 314                         atomic_read(&server->smbd_conn->send_pending),
 315                         atomic_read(&server->smbd_conn->send_payload_pending),
 316                         server->smbd_conn->smbd_send_pending,
 317                         server->smbd_conn->smbd_recv_pending);
 318                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 319                         "count_empty_packet_queue: %x",
 320                         server->smbd_conn->count_receive_queue,
 321                         server->smbd_conn->count_empty_packet_queue);
 322                 seq_printf(m, "\nMR responder_resources: %x "
 323                         "max_frmr_depth: %x mr_type: %x",
 324                         server->smbd_conn->responder_resources,
 325                         server->smbd_conn->max_frmr_depth,
 326                         server->smbd_conn->mr_type);
 327                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 328                         atomic_read(&server->smbd_conn->mr_ready_count),
 329                         atomic_read(&server->smbd_conn->mr_used_count));
 330 skip_rdma:
 331 #endif
 332                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 333                         server->credits,  server->dialect);
 334                 if (server->sign)
 335                         seq_printf(m, " signed");
 336                 if (server->posix_ext_supported)
 337                         seq_printf(m, " posix");
 338
 339                 i++;
 340                 list_for_each(tmp2, &server->smb_ses_list) {
 341                         ses = list_entry(tmp2, struct cifs_ses,
 342                                          smb_ses_list);
 343                         if ((ses->serverDomain == NULL) ||
 344                                 (ses->serverOS == NULL) ||
 345                                 (ses->serverNOS == NULL)) {
 346                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 347                                         i, ses->serverName, ses->ses_count,
 348                                         ses->capabilities, ses->status);
 349                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 350                                         seq_printf(m, "Guest\t");
 351                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 352                                         seq_printf(m, "Anonymous\t");
 353                         } else {
 354                                 seq_printf(m,
 355                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 356                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 357                                     " session status: %d ",
 358                                 i, ses->serverName, ses->serverDomain,
 359                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 360                                 ses->capabilities, ses->status);
 361                         }
 362                         if (server->rdma)
 363                                 seq_printf(m, "RDMA\n\t");
 364                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 365                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 366                                    server->tcpStatus,
 367                                    server->reconnect_instance,
 368                                    server->srv_count,
 369                                    server->sec_mode, in_flight(server));
 370
 371 #ifdef CONFIG_CIFS_STATS2
 372                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 373                                 atomic_read(&server->in_send),
 374                                 atomic_read(&server->num_waiters));
 375 #endif
 376                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 377                                 seq_puts(m, " encrypted");
 378                         if (ses->sign)
 379                                 seq_puts(m, " signed");
 380
 381                         seq_puts(m, "\n\tShares:");
 382                         j = 0;
 383
 384                         seq_printf(m, "\n\t%d) IPC: ", j);
 385                         if (ses->tcon_ipc)
 386                                 cifs_debug_tcon(m, ses->tcon_ipc);
 387                         else
 388                                 seq_puts(m, "none\n");
 389
 390                         list_for_each(tmp3, &ses->tcon_list) {
 391                                 tcon = list_entry(tmp3, struct cifs_tcon,
 392                                                   tcon_list);
 393                                 ++j;
 394                                 seq_printf(m, "\n\t%d) ", j);
 395                                 cifs_debug_tcon(m, tcon);
 396                         }
 397
 398                         seq_puts(m, "\n\tMIDs:\n");
 399
 400                         spin_lock(&GlobalMid_Lock);
 401                         list_for_each(tmp3, &server->pending_mid_q) {
 402                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 403                                         qhead);
 404                                 seq_printf(m, "\tState: %d com: %d pid:"
 405                                               " %d cbdata: %p mid %llu\n",
 406                                               mid_entry->mid_state,
 407                                               le16_to_cpu(mid_entry->command),
 408                                               mid_entry->pid,
 409                                               mid_entry->callback_data,
 410                                               mid_entry->mid);
 411                         }
 412                         spin_unlock(&GlobalMid_Lock);
 413
 414                         spin_lock(&ses->iface_lock);
 415                         if (ses->iface_count)
 416                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 417                                            ses->iface_count);
 418                         for (j = 0; j < ses->iface_count; j++) {
 419                                 seq_printf(m, "\t%d)", j);
 420                                 cifs_dump_iface(m, &ses->iface_list[j]);
 421                         }
 422                         spin_unlock(&ses->iface_lock);
 423                 }
 424         }
 425         spin_unlock(&cifs_tcp_ses_lock);
 426         seq_putc(m, '\n');
 427
 428         /* BB add code to dump additional info such as TCP session info now */
 429         return 0;
 430 }
 431
 432 static ssize_t cifs_stats_proc_write(struct file *file,
 433                 const char __user *buffer, size_t count, loff_t *ppos)
 434 {
 435         bool bv;
 436         int rc;
 437         struct list_head *tmp1, *tmp2, *tmp3;
 438         struct TCP_Server_Info *server;
 439         struct cifs_ses *ses;
 440         struct cifs_tcon *tcon;
 441
 442         rc = kstrtobool_from_user(buffer, count, &bv);
 443         if (rc == 0) {
 444 #ifdef CONFIG_CIFS_STATS2
 445                 int i;
 446
 447                 atomic_set(&totBufAllocCount, 0);
 448                 atomic_set(&totSmBufAllocCount, 0);
 449 #endif /* CONFIG_CIFS_STATS2 */
 450                 atomic_set(&tcpSesReconnectCount, 0);
 451                 atomic_set(&tconInfoReconnectCount, 0);
 452
 453                 spin_lock(&GlobalMid_Lock);
 454                 GlobalMaxActiveXid = 0;
 455                 GlobalCurrentXid = 0;
 456                 spin_unlock(&GlobalMid_Lock);
 457                 spin_lock(&cifs_tcp_ses_lock);
 458                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 459                         server = list_entry(tmp1, struct TCP_Server_Info,
 460                                             tcp_ses_list);
 461 #ifdef CONFIG_CIFS_STATS2
 462                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
 463                                 atomic_set(&server->smb2slowcmd[i], 0);
 464 #endif /* CONFIG_CIFS_STATS2 */
 465                         list_for_each(tmp2, &server->smb_ses_list) {
 466                                 ses = list_entry(tmp2, struct cifs_ses,
 467                                                  smb_ses_list);
 468                                 list_for_each(tmp3, &ses->tcon_list) {
 469                                         tcon = list_entry(tmp3,
 470                                                           struct cifs_tcon,
 471                                                           tcon_list);
 472                                         atomic_set(&tcon->num_smbs_sent, 0);
 473                                         spin_lock(&tcon->stat_lock);
 474                                         tcon->bytes_read = 0;
 475                                         tcon->bytes_written = 0;
 476                                         spin_unlock(&tcon->stat_lock);
 477                                         if (server->ops->clear_stats)
 478                                                 server->ops->clear_stats(tcon);
 479                                 }
 480                         }
 481                 }
 482                 spin_unlock(&cifs_tcp_ses_lock);
 483         } else {
 484                 return rc;
 485         }
 486
 487         return count;
 488 }
 489
 490 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 491 {
 492         int i;
 493 #ifdef CONFIG_CIFS_STATS2
 494         int j;
 495 #endif /* STATS2 */
 496         struct list_head *tmp1, *tmp2, *tmp3;
 497         struct TCP_Server_Info *server;
 498         struct cifs_ses *ses;
 499         struct cifs_tcon *tcon;
 500
 501         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 502                         sesInfoAllocCount.counter);
 503         seq_printf(m, "Share (unique mount targets): %d\n",
 504                         tconInfoAllocCount.counter);
 505         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 506                         bufAllocCount.counter,
 507                         cifs_min_rcv + tcpSesAllocCount.counter);
 508         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 509                         smBufAllocCount.counter, cifs_min_small);
 510 #ifdef CONFIG_CIFS_STATS2
 511         seq_printf(m, "Total Large %d Small %d Allocations\n",
 512                                 atomic_read(&totBufAllocCount),
 513                                 atomic_read(&totSmBufAllocCount));
 514 #endif /* CONFIG_CIFS_STATS2 */
 515
 516         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 517         seq_printf(m,
 518                 "\n%d session %d share reconnects\n",
 519                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 520
 521         seq_printf(m,
 522                 "Total vfs operations: %d maximum at one time: %d\n",
 523                 GlobalCurrentXid, GlobalMaxActiveXid);
 524
 525         i = 0;
 526         spin_lock(&cifs_tcp_ses_lock);
 527         list_for_each(tmp1, &cifs_tcp_ses_list) {
 528                 server = list_entry(tmp1, struct TCP_Server_Info,
 529                                     tcp_ses_list);
 530 #ifdef CONFIG_CIFS_STATS2
 531                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 532                         if (atomic_read(&server->smb2slowcmd[j]))
 533                                 seq_printf(m, "%d slow responses from %s for command %d\n",
 534                                         atomic_read(&server->smb2slowcmd[j]),
 535                                         server->hostname, j);
 536 #endif /* STATS2 */
 537                 list_for_each(tmp2, &server->smb_ses_list) {
 538                         ses = list_entry(tmp2, struct cifs_ses,
 539                                          smb_ses_list);
 540                         list_for_each(tmp3, &ses->tcon_list) {
 541                                 tcon = list_entry(tmp3,
 542                                                   struct cifs_tcon,
 543                                                   tcon_list);
 544                                 i++;
 545                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 546                                 if (tcon->need_reconnect)
 547                                         seq_puts(m, "\tDISCONNECTED ");
 548                                 seq_printf(m, "\nSMBs: %d",
 549                                            atomic_read(&tcon->num_smbs_sent));
 550                                 if (server->ops->print_stats)
 551                                         server->ops->print_stats(m, tcon);
 552                         }
 553                 }
 554         }
 555         spin_unlock(&cifs_tcp_ses_lock);
 556
 557         seq_putc(m, '\n');
 558         return 0;
 559 }
 560
 561 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 562 {
 563         return single_open(file, cifs_stats_proc_show, NULL);
 564 }
 565
 566 static const struct file_operations cifs_stats_proc_fops = {
 567         .open           = cifs_stats_proc_open,
 568         .read           = seq_read,
 569         .llseek         = seq_lseek,
 570         .release        = single_release,
 571         .write          = cifs_stats_proc_write,
 572 };
 573
 574 #ifdef CONFIG_CIFS_SMB_DIRECT
 575 #define PROC_FILE_DEFINE(name) \
 576 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 577         size_t count, loff_t *ppos) \
 578 { \
 579         int rc; \
 580         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 581         if (rc) \
 582                 return rc; \
 583         return count; \
 584 } \
 585 static int name##_proc_show(struct seq_file *m, void *v) \
 586 { \
 587         seq_printf(m, "%d\n", name ); \
 588         return 0; \
 589 } \
 590 static int name##_open(struct inode *inode, struct file *file) \
 591 { \
 592         return single_open(file, name##_proc_show, NULL); \
 593 } \
 594 \
 595 static const struct file_operations cifs_##name##_proc_fops = { \
 596         .open           = name##_open, \
 597         .read           = seq_read, \
 598         .llseek         = seq_lseek, \
 599         .release        = single_release, \
 600         .write          = name##_write, \
 601 }
 602
 603 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 604 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 605 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 606 PROC_FILE_DEFINE(smbd_max_receive_size);
 607 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 608 PROC_FILE_DEFINE(smbd_max_send_size);
 609 PROC_FILE_DEFINE(smbd_send_credit_target);
 610 PROC_FILE_DEFINE(smbd_receive_credit_max);
 611 #endif
 612
 613 static struct proc_dir_entry *proc_fs_cifs;
 614 static const struct file_operations cifsFYI_proc_fops;
 615 static const struct file_operations cifs_lookup_cache_proc_fops;
 616 static const struct file_operations traceSMB_proc_fops;
 617 static const struct file_operations cifs_security_flags_proc_fops;
 618 static const struct file_operations cifs_linux_ext_proc_fops;
 619
 620 void
 621 cifs_proc_init(void)
 622 {
 623         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 624         if (proc_fs_cifs == NULL)
 625                 return;
 626
 627         proc_create_single("DebugData", 0, proc_fs_cifs,
 628                         cifs_debug_data_proc_show);
 629
 630         proc_create_single("open_files", 0400, proc_fs_cifs,
 631                         cifs_debug_files_proc_show);
 632
 633         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 634         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 635         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 636         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 637                     &cifs_linux_ext_proc_fops);
 638         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 639                     &cifs_security_flags_proc_fops);
 640         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 641                     &cifs_lookup_cache_proc_fops);
 642
 643 #ifdef CONFIG_CIFS_DFS_UPCALL
 644         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
 645 #endif
 646
 647 #ifdef CONFIG_CIFS_SMB_DIRECT
 648         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 649                 &cifs_rdma_readwrite_threshold_proc_fops);
 650         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 651                 &cifs_smbd_max_frmr_depth_proc_fops);
 652         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 653                 &cifs_smbd_keep_alive_interval_proc_fops);
 654         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 655                 &cifs_smbd_max_receive_size_proc_fops);
 656         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 657                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 658         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 659                 &cifs_smbd_max_send_size_proc_fops);
 660         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 661                 &cifs_smbd_send_credit_target_proc_fops);
 662         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 663                 &cifs_smbd_receive_credit_max_proc_fops);
 664 #endif
 665 }
 666
 667 void
 668 cifs_proc_clean(void)
 669 {
 670         if (proc_fs_cifs == NULL)
 671                 return;
 672
 673         remove_proc_entry("DebugData", proc_fs_cifs);
 674         remove_proc_entry("open_files", proc_fs_cifs);
 675         remove_proc_entry("cifsFYI", proc_fs_cifs);
 676         remove_proc_entry("traceSMB", proc_fs_cifs);
 677         remove_proc_entry("Stats", proc_fs_cifs);
 678         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 679         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 680         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 681
 682 #ifdef CONFIG_CIFS_DFS_UPCALL
 683         remove_proc_entry("dfscache", proc_fs_cifs);
 684 #endif
 685 #ifdef CONFIG_CIFS_SMB_DIRECT
 686         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 687         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 688         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 689         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 690         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 691         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 692         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 693         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 694 #endif
 695         remove_proc_entry("fs/cifs", NULL);
 696 }
 697
 698 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 699 {
 700         seq_printf(m, "%d\n", cifsFYI);
 701         return 0;
 702 }
 703
 704 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 705 {
 706         return single_open(file, cifsFYI_proc_show, NULL);
 707 }
 708
 709 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 710                 size_t count, loff_t *ppos)
 711 {
 712         char c[2] = { '\0' };
 713         bool bv;
 714         int rc;
 715
 716         rc = get_user(c[0], buffer);
 717         if (rc)
 718                 return rc;
 719         if (strtobool(c, &bv) == 0)
 720                 cifsFYI = bv;
 721         else if ((c[0] > '1') && (c[0] <= '9'))
 722                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 723         else
 724                 return -EINVAL;
 725
 726         return count;
 727 }
 728
 729 static const struct file_operations cifsFYI_proc_fops = {
 730         .open           = cifsFYI_proc_open,
 731         .read           = seq_read,
 732         .llseek         = seq_lseek,
 733         .release        = single_release,
 734         .write          = cifsFYI_proc_write,
 735 };
 736
 737 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 738 {
 739         seq_printf(m, "%d\n", linuxExtEnabled);
 740         return 0;
 741 }
 742
 743 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 744 {
 745         return single_open(file, cifs_linux_ext_proc_show, NULL);
 746 }
 747
 748 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 749                 const char __user *buffer, size_t count, loff_t *ppos)
 750 {
 751         int rc;
 752
 753         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 754         if (rc)
 755                 return rc;
 756
 757         return count;
 758 }
 759
 760 static const struct file_operations cifs_linux_ext_proc_fops = {
 761         .open           = cifs_linux_ext_proc_open,
 762         .read           = seq_read,
 763         .llseek         = seq_lseek,
 764         .release        = single_release,
 765         .write          = cifs_linux_ext_proc_write,
 766 };
 767
 768 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 769 {
 770         seq_printf(m, "%d\n", lookupCacheEnabled);
 771         return 0;
 772 }
 773
 774 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 775 {
 776         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 777 }
 778
 779 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 780                 const char __user *buffer, size_t count, loff_t *ppos)
 781 {
 782         int rc;
 783
 784         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 785         if (rc)
 786                 return rc;
 787
 788         return count;
 789 }
 790
 791 static const struct file_operations cifs_lookup_cache_proc_fops = {
 792         .open           = cifs_lookup_cache_proc_open,
 793         .read           = seq_read,
 794         .llseek         = seq_lseek,
 795         .release        = single_release,
 796         .write          = cifs_lookup_cache_proc_write,
 797 };
 798
 799 static int traceSMB_proc_show(struct seq_file *m, void *v)
 800 {
 801         seq_printf(m, "%d\n", traceSMB);
 802         return 0;
 803 }
 804
 805 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 806 {
 807         return single_open(file, traceSMB_proc_show, NULL);
 808 }
 809
 810 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 811                 size_t count, loff_t *ppos)
 812 {
 813         int rc;
 814
 815         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 816         if (rc)
 817                 return rc;
 818
 819         return count;
 820 }
 821
 822 static const struct file_operations traceSMB_proc_fops = {
 823         .open           = traceSMB_proc_open,
 824         .read           = seq_read,
 825         .llseek         = seq_lseek,
 826         .release        = single_release,
 827         .write          = traceSMB_proc_write,
 828 };
 829
 830 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 831 {
 832         seq_printf(m, "0x%x\n", global_secflags);
 833         return 0;
 834 }
 835
 836 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 837 {
 838         return single_open(file, cifs_security_flags_proc_show, NULL);
 839 }
 840
 841 /*
 842  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 843  * flags except for the ones corresponding to the given MUST flag. If there are
 844  * multiple MUST flags, then try to prefer more secure ones.
 845  */
 846 static void
 847 cifs_security_flags_handle_must_flags(unsigned int *flags)
 848 {
 849         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 850
 851         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 852                 *flags = CIFSSEC_MUST_KRB5;
 853         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 854                 *flags = CIFSSEC_MUST_NTLMSSP;
 855         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 856                 *flags = CIFSSEC_MUST_NTLMV2;
 857         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 858                 *flags = CIFSSEC_MUST_NTLM;
 859         else if (CIFSSEC_MUST_LANMAN &&
 860                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 861                 *flags = CIFSSEC_MUST_LANMAN;
 862         else if (CIFSSEC_MUST_PLNTXT &&
 863                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 864                 *flags = CIFSSEC_MUST_PLNTXT;
 865
 866         *flags |= signflags;
 867 }
 868
 869 static ssize_t cifs_security_flags_proc_write(struct file *file,
 870                 const char __user *buffer, size_t count, loff_t *ppos)
 871 {
 872         int rc;
 873         unsigned int flags;
 874         char flags_string[12];
 875         bool bv;
 876
 877         if ((count < 1) || (count > 11))
 878                 return -EINVAL;
 879
 880         memset(flags_string, 0, 12);
 881
 882         if (copy_from_user(flags_string, buffer, count))
 883                 return -EFAULT;
 884
 885         if (count < 3) {
 886                 /* single char or single char followed by null */
 887                 if (strtobool(flags_string, &bv) == 0) {
 888                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 889                         return count;
 890                 } else if (!isdigit(flags_string[0])) {
 891                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 892                                         flags_string);
 893                         return -EINVAL;
 894                 }
 895         }
 896
 897         /* else we have a number */
 898         rc = kstrtouint(flags_string, 0, &flags);
 899         if (rc) {
 900                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 901                                 flags_string);
 902                 return rc;
 903         }
 904
 905         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 906
 907         if (flags == 0)  {
 908                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 909                 return -EINVAL;
 910         }
 911
 912         if (flags & ~CIFSSEC_MASK) {
 913                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 914                          flags & ~CIFSSEC_MASK);
 915                 return -EINVAL;
 916         }
 917
 918         cifs_security_flags_handle_must_flags(&flags);
 919
 920         /* flags look ok - update the global security flags for cifs module */
 921         global_secflags = flags;
 922         if (global_secflags & CIFSSEC_MUST_SIGN) {
 923                 /* requiring signing implies signing is allowed */
 924                 global_secflags |= CIFSSEC_MAY_SIGN;
 925                 cifs_dbg(FYI, "packet signing now required\n");
 926         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 927                 cifs_dbg(FYI, "packet signing disabled\n");
 928         }
 929         /* BB should we turn on MAY flags for other MUST options? */
 930         return count;
 931 }
 932
 933 static const struct file_operations cifs_security_flags_proc_fops = {
 934         .open           = cifs_security_flags_proc_open,
 935         .read           = seq_read,
 936         .llseek         = seq_lseek,
 937         .release        = single_release,
 938         .write          = cifs_security_flags_proc_write,
 939 };
 940 #else
 941 inline void cifs_proc_init(void)
 942 {
 943 }
 944
 945 inline void cifs_proc_clean(void)
 946 {
 947 }
 948 #endif /* PROC_FS */