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