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