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, struct TCP_Server_Info *server)
  46 {
  47 #ifdef CONFIG_CIFS_DEBUG2
  48         struct smb_hdr *smb = (struct smb_hdr *)buf;
  49
  50         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  51                  smb->Command, smb->Status.CifsError,
  52                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  53         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  54                  server->ops->calc_smb_size(smb, server));
  55 #endif /* CONFIG_CIFS_DEBUG2 */
  56 }
  57
  58 void cifs_dump_mids(struct TCP_Server_Info *server)
  59 {
  60 #ifdef CONFIG_CIFS_DEBUG2
  61         struct list_head *tmp;
  62         struct mid_q_entry *mid_entry;
  63
  64         if (server == NULL)
  65                 return;
  66
  67         cifs_dbg(VFS, "Dump pending requests:\n");
  68         spin_lock(&GlobalMid_Lock);
  69         list_for_each(tmp, &server->pending_mid_q) {
  70                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  71                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  72                          mid_entry->mid_state,
  73                          le16_to_cpu(mid_entry->command),
  74                          mid_entry->pid,
  75                          mid_entry->callback_data,
  76                          mid_entry->mid);
  77 #ifdef CONFIG_CIFS_STATS2
  78                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  79                          mid_entry->large_buf,
  80                          mid_entry->resp_buf,
  81                          mid_entry->when_received,
  82                          jiffies);
  83 #endif /* STATS2 */
  84                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  85                          mid_entry->multiRsp, mid_entry->multiEnd);
  86                 if (mid_entry->resp_buf) {
  87                         cifs_dump_detail(mid_entry->resp_buf, server);
  88                         cifs_dump_mem("existing buf: ",
  89                                 mid_entry->resp_buf, 62);
  90                 }
  91         }
  92         spin_unlock(&GlobalMid_Lock);
  93 #endif /* CONFIG_CIFS_DEBUG2 */
  94 }
  95
  96 #ifdef CONFIG_PROC_FS
  97 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  98 {
  99         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 100
 101         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
 102         if (tcon->nativeFileSystem)
 103                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
 104         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
 105                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 106                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 107                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 108                    tcon->tidStatus);
 109         if (dev_type == FILE_DEVICE_DISK)
 110                 seq_puts(m, " type: DISK ");
 111         else if (dev_type == FILE_DEVICE_CD_ROM)
 112                 seq_puts(m, " type: CDROM ");
 113         else
 114                 seq_printf(m, " type: %d ", dev_type);
 115         if (tcon->seal)
 116                 seq_printf(m, " Encrypted");
 117         if (tcon->nocase)
 118                 seq_printf(m, " nocase");
 119         if (tcon->unix_ext)
 120                 seq_printf(m, " POSIX Extensions");
 121         if (tcon->ses->server->ops->dump_share_caps)
 122                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 123
 124         if (tcon->need_reconnect)
 125                 seq_puts(m, "\tDISCONNECTED ");
 126         seq_putc(m, '\n');
 127 }
 128
 129 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 130 {
 131         struct list_head *tmp1, *tmp2, *tmp3;
 132         struct mid_q_entry *mid_entry;
 133         struct TCP_Server_Info *server;
 134         struct cifs_ses *ses;
 135         struct cifs_tcon *tcon;
 136         int i, j;
 137
 138         seq_puts(m,
 139                     "Display Internal CIFS Data Structures for Debugging\n"
 140                     "---------------------------------------------------\n");
 141         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 142         seq_printf(m, "Features:");
 143 #ifdef CONFIG_CIFS_DFS_UPCALL
 144         seq_printf(m, " dfs");
 145 #endif
 146 #ifdef CONFIG_CIFS_FSCACHE
 147         seq_printf(m, " fscache");
 148 #endif
 149 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 150         seq_printf(m, " lanman");
 151 #endif
 152 #ifdef CONFIG_CIFS_POSIX
 153         seq_printf(m, " posix");
 154 #endif
 155 #ifdef CONFIG_CIFS_UPCALL
 156         seq_printf(m, " spnego");
 157 #endif
 158 #ifdef CONFIG_CIFS_XATTR
 159         seq_printf(m, " xattr");
 160 #endif
 161 #ifdef CONFIG_CIFS_ACL
 162         seq_printf(m, " acl");
 163 #endif
 164         seq_putc(m, '\n');
 165         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 166         seq_printf(m, "Servers:");
 167
 168         i = 0;
 169         spin_lock(&cifs_tcp_ses_lock);
 170         list_for_each(tmp1, &cifs_tcp_ses_list) {
 171                 server = list_entry(tmp1, struct TCP_Server_Info,
 172                                     tcp_ses_list);
 173
 174 #ifdef CONFIG_CIFS_SMB_DIRECT
 175                 if (!server->rdma)
 176                         goto skip_rdma;
 177
 178                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 179                         "transport status: %x",
 180                         server->smbd_conn->protocol,
 181                         server->smbd_conn->transport_status);
 182                 seq_printf(m, "\nConn receive_credit_max: %x "
 183                         "send_credit_target: %x max_send_size: %x",
 184                         server->smbd_conn->receive_credit_max,
 185                         server->smbd_conn->send_credit_target,
 186                         server->smbd_conn->max_send_size);
 187                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 188                         "max_fragmented_send_size: %x max_receive_size:%x",
 189                         server->smbd_conn->max_fragmented_recv_size,
 190                         server->smbd_conn->max_fragmented_send_size,
 191                         server->smbd_conn->max_receive_size);
 192                 seq_printf(m, "\nConn keep_alive_interval: %x "
 193                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 194                         server->smbd_conn->keep_alive_interval,
 195                         server->smbd_conn->max_readwrite_size,
 196                         server->smbd_conn->rdma_readwrite_threshold);
 197                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 198                         "count_put_receive_buffer: %x count_send_empty: %x",
 199                         server->smbd_conn->count_get_receive_buffer,
 200                         server->smbd_conn->count_put_receive_buffer,
 201                         server->smbd_conn->count_send_empty);
 202                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 203                         "count_enqueue_reassembly_queue: %x "
 204                         "count_dequeue_reassembly_queue: %x "
 205                         "fragment_reassembly_remaining: %x "
 206                         "reassembly_data_length: %x "
 207                         "reassembly_queue_length: %x",
 208                         server->smbd_conn->count_reassembly_queue,
 209                         server->smbd_conn->count_enqueue_reassembly_queue,
 210                         server->smbd_conn->count_dequeue_reassembly_queue,
 211                         server->smbd_conn->fragment_reassembly_remaining,
 212                         server->smbd_conn->reassembly_data_length,
 213                         server->smbd_conn->reassembly_queue_length);
 214                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 215                         "receive_credits: %x receive_credit_target: %x",
 216                         atomic_read(&server->smbd_conn->send_credits),
 217                         atomic_read(&server->smbd_conn->receive_credits),
 218                         server->smbd_conn->receive_credit_target);
 219                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 220                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 221                         atomic_read(&server->smbd_conn->send_pending),
 222                         atomic_read(&server->smbd_conn->send_payload_pending),
 223                         server->smbd_conn->smbd_send_pending,
 224                         server->smbd_conn->smbd_recv_pending);
 225                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 226                         "count_empty_packet_queue: %x",
 227                         server->smbd_conn->count_receive_queue,
 228                         server->smbd_conn->count_empty_packet_queue);
 229                 seq_printf(m, "\nMR responder_resources: %x "
 230                         "max_frmr_depth: %x mr_type: %x",
 231                         server->smbd_conn->responder_resources,
 232                         server->smbd_conn->max_frmr_depth,
 233                         server->smbd_conn->mr_type);
 234                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 235                         atomic_read(&server->smbd_conn->mr_ready_count),
 236                         atomic_read(&server->smbd_conn->mr_used_count));
 237 skip_rdma:
 238 #endif
 239                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 240                         server->credits,  server->dialect);
 241                 if (server->sign)
 242                         seq_printf(m, " signed");
 243 #ifdef CONFIG_CIFS_SMB311
 244                 if (server->posix_ext_supported)
 245                         seq_printf(m, " posix");
 246 #endif /* 3.1.1 */
 247                 i++;
 248                 list_for_each(tmp2, &server->smb_ses_list) {
 249                         ses = list_entry(tmp2, struct cifs_ses,
 250                                          smb_ses_list);
 251                         if ((ses->serverDomain == NULL) ||
 252                                 (ses->serverOS == NULL) ||
 253                                 (ses->serverNOS == NULL)) {
 254                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
 255                                         i, ses->serverName, ses->ses_count,
 256                                         ses->capabilities, ses->status);
 257                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 258                                         seq_printf(m, "Guest\t");
 259                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 260                                         seq_printf(m, "Anonymous\t");
 261                         } else {
 262                                 seq_printf(m,
 263                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 264                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 265                                     " session status: %d\t",
 266                                 i, ses->serverName, ses->serverDomain,
 267                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 268                                 ses->capabilities, ses->status);
 269                         }
 270                         if (server->rdma)
 271                                 seq_printf(m, "RDMA\n\t");
 272                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 273                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 274                                    server->tcpStatus, server->srv_count,
 275                                    server->sec_mode, in_flight(server));
 276
 277 #ifdef CONFIG_CIFS_STATS2
 278                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 279                                 atomic_read(&server->in_send),
 280                                 atomic_read(&server->num_waiters));
 281 #endif
 282
 283                         seq_puts(m, "\n\tShares:");
 284                         j = 0;
 285
 286                         seq_printf(m, "\n\t%d) IPC: ", j);
 287                         if (ses->tcon_ipc)
 288                                 cifs_debug_tcon(m, ses->tcon_ipc);
 289                         else
 290                                 seq_puts(m, "none\n");
 291
 292                         list_for_each(tmp3, &ses->tcon_list) {
 293                                 tcon = list_entry(tmp3, struct cifs_tcon,
 294                                                   tcon_list);
 295                                 ++j;
 296                                 seq_printf(m, "\n\t%d) ", j);
 297                                 cifs_debug_tcon(m, tcon);
 298                         }
 299
 300                         seq_puts(m, "\n\tMIDs:\n");
 301
 302                         spin_lock(&GlobalMid_Lock);
 303                         list_for_each(tmp3, &server->pending_mid_q) {
 304                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 305                                         qhead);
 306                                 seq_printf(m, "\tState: %d com: %d pid:"
 307                                               " %d cbdata: %p mid %llu\n",
 308                                               mid_entry->mid_state,
 309                                               le16_to_cpu(mid_entry->command),
 310                                               mid_entry->pid,
 311                                               mid_entry->callback_data,
 312                                               mid_entry->mid);
 313                         }
 314                         spin_unlock(&GlobalMid_Lock);
 315                 }
 316         }
 317         spin_unlock(&cifs_tcp_ses_lock);
 318         seq_putc(m, '\n');
 319
 320         /* BB add code to dump additional info such as TCP session info now */
 321         return 0;
 322 }
 323
 324 #ifdef CONFIG_CIFS_STATS
 325 static ssize_t cifs_stats_proc_write(struct file *file,
 326                 const char __user *buffer, size_t count, loff_t *ppos)
 327 {
 328         bool bv;
 329         int rc;
 330         struct list_head *tmp1, *tmp2, *tmp3;
 331         struct TCP_Server_Info *server;
 332         struct cifs_ses *ses;
 333         struct cifs_tcon *tcon;
 334
 335         rc = kstrtobool_from_user(buffer, count, &bv);
 336         if (rc == 0) {
 337 #ifdef CONFIG_CIFS_STATS2
 338                 atomic_set(&totBufAllocCount, 0);
 339                 atomic_set(&totSmBufAllocCount, 0);
 340 #endif /* CONFIG_CIFS_STATS2 */
 341                 spin_lock(&cifs_tcp_ses_lock);
 342                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 343                         server = list_entry(tmp1, struct TCP_Server_Info,
 344                                             tcp_ses_list);
 345                         list_for_each(tmp2, &server->smb_ses_list) {
 346                                 ses = list_entry(tmp2, struct cifs_ses,
 347                                                  smb_ses_list);
 348                                 list_for_each(tmp3, &ses->tcon_list) {
 349                                         tcon = list_entry(tmp3,
 350                                                           struct cifs_tcon,
 351                                                           tcon_list);
 352                                         atomic_set(&tcon->num_smbs_sent, 0);
 353                                         if (server->ops->clear_stats)
 354                                                 server->ops->clear_stats(tcon);
 355                                 }
 356                         }
 357                 }
 358                 spin_unlock(&cifs_tcp_ses_lock);
 359         } else {
 360                 return rc;
 361         }
 362
 363         return count;
 364 }
 365
 366 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 367 {
 368         int i;
 369         struct list_head *tmp1, *tmp2, *tmp3;
 370         struct TCP_Server_Info *server;
 371         struct cifs_ses *ses;
 372         struct cifs_tcon *tcon;
 373
 374         seq_printf(m,
 375                         "Resources in use\nCIFS Session: %d\n",
 376                         sesInfoAllocCount.counter);
 377         seq_printf(m, "Share (unique mount targets): %d\n",
 378                         tconInfoAllocCount.counter);
 379         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 380                         bufAllocCount.counter,
 381                         cifs_min_rcv + tcpSesAllocCount.counter);
 382         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 383                         smBufAllocCount.counter, cifs_min_small);
 384 #ifdef CONFIG_CIFS_STATS2
 385         seq_printf(m, "Total Large %d Small %d Allocations\n",
 386                                 atomic_read(&totBufAllocCount),
 387                                 atomic_read(&totSmBufAllocCount));
 388 #endif /* CONFIG_CIFS_STATS2 */
 389
 390         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 391         seq_printf(m,
 392                 "\n%d session %d share reconnects\n",
 393                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 394
 395         seq_printf(m,
 396                 "Total vfs operations: %d maximum at one time: %d\n",
 397                 GlobalCurrentXid, GlobalMaxActiveXid);
 398
 399         i = 0;
 400         spin_lock(&cifs_tcp_ses_lock);
 401         list_for_each(tmp1, &cifs_tcp_ses_list) {
 402                 server = list_entry(tmp1, struct TCP_Server_Info,
 403                                     tcp_ses_list);
 404                 list_for_each(tmp2, &server->smb_ses_list) {
 405                         ses = list_entry(tmp2, struct cifs_ses,
 406                                          smb_ses_list);
 407                         list_for_each(tmp3, &ses->tcon_list) {
 408                                 tcon = list_entry(tmp3,
 409                                                   struct cifs_tcon,
 410                                                   tcon_list);
 411                                 i++;
 412                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 413                                 if (tcon->need_reconnect)
 414                                         seq_puts(m, "\tDISCONNECTED ");
 415                                 seq_printf(m, "\nSMBs: %d",
 416                                            atomic_read(&tcon->num_smbs_sent));
 417                                 if (server->ops->print_stats)
 418                                         server->ops->print_stats(m, tcon);
 419                         }
 420                 }
 421         }
 422         spin_unlock(&cifs_tcp_ses_lock);
 423
 424         seq_putc(m, '\n');
 425         return 0;
 426 }
 427
 428 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 429 {
 430         return single_open(file, cifs_stats_proc_show, NULL);
 431 }
 432
 433 static const struct file_operations cifs_stats_proc_fops = {
 434         .open           = cifs_stats_proc_open,
 435         .read           = seq_read,
 436         .llseek         = seq_lseek,
 437         .release        = single_release,
 438         .write          = cifs_stats_proc_write,
 439 };
 440 #endif /* STATS */
 441
 442 #ifdef CONFIG_CIFS_SMB_DIRECT
 443 #define PROC_FILE_DEFINE(name) \
 444 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 445         size_t count, loff_t *ppos) \
 446 { \
 447         int rc; \
 448         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 449         if (rc) \
 450                 return rc; \
 451         return count; \
 452 } \
 453 static int name##_proc_show(struct seq_file *m, void *v) \
 454 { \
 455         seq_printf(m, "%d\n", name ); \
 456         return 0; \
 457 } \
 458 static int name##_open(struct inode *inode, struct file *file) \
 459 { \
 460         return single_open(file, name##_proc_show, NULL); \
 461 } \
 462 \
 463 static const struct file_operations cifs_##name##_proc_fops = { \
 464         .open           = name##_open, \
 465         .read           = seq_read, \
 466         .llseek         = seq_lseek, \
 467         .release        = single_release, \
 468         .write          = name##_write, \
 469 }
 470
 471 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 472 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 473 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 474 PROC_FILE_DEFINE(smbd_max_receive_size);
 475 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 476 PROC_FILE_DEFINE(smbd_max_send_size);
 477 PROC_FILE_DEFINE(smbd_send_credit_target);
 478 PROC_FILE_DEFINE(smbd_receive_credit_max);
 479 #endif
 480
 481 static struct proc_dir_entry *proc_fs_cifs;
 482 static const struct file_operations cifsFYI_proc_fops;
 483 static const struct file_operations cifs_lookup_cache_proc_fops;
 484 static const struct file_operations traceSMB_proc_fops;
 485 static const struct file_operations cifs_security_flags_proc_fops;
 486 static const struct file_operations cifs_linux_ext_proc_fops;
 487
 488 void
 489 cifs_proc_init(void)
 490 {
 491         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 492         if (proc_fs_cifs == NULL)
 493                 return;
 494
 495         proc_create_single("DebugData", 0, proc_fs_cifs,
 496                         cifs_debug_data_proc_show);
 497
 498 #ifdef CONFIG_CIFS_STATS
 499         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 500 #endif /* STATS */
 501         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 502         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 503         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 504                     &cifs_linux_ext_proc_fops);
 505         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 506                     &cifs_security_flags_proc_fops);
 507         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 508                     &cifs_lookup_cache_proc_fops);
 509 #ifdef CONFIG_CIFS_SMB_DIRECT
 510         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 511                 &cifs_rdma_readwrite_threshold_proc_fops);
 512         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 513                 &cifs_smbd_max_frmr_depth_proc_fops);
 514         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 515                 &cifs_smbd_keep_alive_interval_proc_fops);
 516         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 517                 &cifs_smbd_max_receive_size_proc_fops);
 518         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 519                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 520         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 521                 &cifs_smbd_max_send_size_proc_fops);
 522         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 523                 &cifs_smbd_send_credit_target_proc_fops);
 524         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 525                 &cifs_smbd_receive_credit_max_proc_fops);
 526 #endif
 527 }
 528
 529 void
 530 cifs_proc_clean(void)
 531 {
 532         if (proc_fs_cifs == NULL)
 533                 return;
 534
 535         remove_proc_entry("DebugData", proc_fs_cifs);
 536         remove_proc_entry("cifsFYI", proc_fs_cifs);
 537         remove_proc_entry("traceSMB", proc_fs_cifs);
 538 #ifdef CONFIG_CIFS_STATS
 539         remove_proc_entry("Stats", proc_fs_cifs);
 540 #endif
 541         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 542         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 543         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 544 #ifdef CONFIG_CIFS_SMB_DIRECT
 545         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 546         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 547         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 548         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 549         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 550         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 551         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 552         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 553 #endif
 554         remove_proc_entry("fs/cifs", NULL);
 555 }
 556
 557 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 558 {
 559         seq_printf(m, "%d\n", cifsFYI);
 560         return 0;
 561 }
 562
 563 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 564 {
 565         return single_open(file, cifsFYI_proc_show, NULL);
 566 }
 567
 568 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 569                 size_t count, loff_t *ppos)
 570 {
 571         char c[2] = { '\0' };
 572         bool bv;
 573         int rc;
 574
 575         rc = get_user(c[0], buffer);
 576         if (rc)
 577                 return rc;
 578         if (strtobool(c, &bv) == 0)
 579                 cifsFYI = bv;
 580         else if ((c[0] > '1') && (c[0] <= '9'))
 581                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 582         else
 583                 return -EINVAL;
 584
 585         return count;
 586 }
 587
 588 static const struct file_operations cifsFYI_proc_fops = {
 589         .open           = cifsFYI_proc_open,
 590         .read           = seq_read,
 591         .llseek         = seq_lseek,
 592         .release        = single_release,
 593         .write          = cifsFYI_proc_write,
 594 };
 595
 596 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 597 {
 598         seq_printf(m, "%d\n", linuxExtEnabled);
 599         return 0;
 600 }
 601
 602 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 603 {
 604         return single_open(file, cifs_linux_ext_proc_show, NULL);
 605 }
 606
 607 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 608                 const char __user *buffer, size_t count, loff_t *ppos)
 609 {
 610         int rc;
 611
 612         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 613         if (rc)
 614                 return rc;
 615
 616         return count;
 617 }
 618
 619 static const struct file_operations cifs_linux_ext_proc_fops = {
 620         .open           = cifs_linux_ext_proc_open,
 621         .read           = seq_read,
 622         .llseek         = seq_lseek,
 623         .release        = single_release,
 624         .write          = cifs_linux_ext_proc_write,
 625 };
 626
 627 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 628 {
 629         seq_printf(m, "%d\n", lookupCacheEnabled);
 630         return 0;
 631 }
 632
 633 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 634 {
 635         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 636 }
 637
 638 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 639                 const char __user *buffer, size_t count, loff_t *ppos)
 640 {
 641         int rc;
 642
 643         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 644         if (rc)
 645                 return rc;
 646
 647         return count;
 648 }
 649
 650 static const struct file_operations cifs_lookup_cache_proc_fops = {
 651         .open           = cifs_lookup_cache_proc_open,
 652         .read           = seq_read,
 653         .llseek         = seq_lseek,
 654         .release        = single_release,
 655         .write          = cifs_lookup_cache_proc_write,
 656 };
 657
 658 static int traceSMB_proc_show(struct seq_file *m, void *v)
 659 {
 660         seq_printf(m, "%d\n", traceSMB);
 661         return 0;
 662 }
 663
 664 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 665 {
 666         return single_open(file, traceSMB_proc_show, NULL);
 667 }
 668
 669 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 670                 size_t count, loff_t *ppos)
 671 {
 672         int rc;
 673
 674         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 675         if (rc)
 676                 return rc;
 677
 678         return count;
 679 }
 680
 681 static const struct file_operations traceSMB_proc_fops = {
 682         .open           = traceSMB_proc_open,
 683         .read           = seq_read,
 684         .llseek         = seq_lseek,
 685         .release        = single_release,
 686         .write          = traceSMB_proc_write,
 687 };
 688
 689 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 690 {
 691         seq_printf(m, "0x%x\n", global_secflags);
 692         return 0;
 693 }
 694
 695 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 696 {
 697         return single_open(file, cifs_security_flags_proc_show, NULL);
 698 }
 699
 700 /*
 701  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 702  * flags except for the ones corresponding to the given MUST flag. If there are
 703  * multiple MUST flags, then try to prefer more secure ones.
 704  */
 705 static void
 706 cifs_security_flags_handle_must_flags(unsigned int *flags)
 707 {
 708         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 709
 710         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 711                 *flags = CIFSSEC_MUST_KRB5;
 712         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 713                 *flags = CIFSSEC_MUST_NTLMSSP;
 714         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 715                 *flags = CIFSSEC_MUST_NTLMV2;
 716         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 717                 *flags = CIFSSEC_MUST_NTLM;
 718         else if (CIFSSEC_MUST_LANMAN &&
 719                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 720                 *flags = CIFSSEC_MUST_LANMAN;
 721         else if (CIFSSEC_MUST_PLNTXT &&
 722                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 723                 *flags = CIFSSEC_MUST_PLNTXT;
 724
 725         *flags |= signflags;
 726 }
 727
 728 static ssize_t cifs_security_flags_proc_write(struct file *file,
 729                 const char __user *buffer, size_t count, loff_t *ppos)
 730 {
 731         int rc;
 732         unsigned int flags;
 733         char flags_string[12];
 734         bool bv;
 735
 736         if ((count < 1) || (count > 11))
 737                 return -EINVAL;
 738
 739         memset(flags_string, 0, 12);
 740
 741         if (copy_from_user(flags_string, buffer, count))
 742                 return -EFAULT;
 743
 744         if (count < 3) {
 745                 /* single char or single char followed by null */
 746                 if (strtobool(flags_string, &bv) == 0) {
 747                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 748                         return count;
 749                 } else if (!isdigit(flags_string[0])) {
 750                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 751                                         flags_string);
 752                         return -EINVAL;
 753                 }
 754         }
 755
 756         /* else we have a number */
 757         rc = kstrtouint(flags_string, 0, &flags);
 758         if (rc) {
 759                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 760                                 flags_string);
 761                 return rc;
 762         }
 763
 764         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 765
 766         if (flags == 0)  {
 767                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 768                 return -EINVAL;
 769         }
 770
 771         if (flags & ~CIFSSEC_MASK) {
 772                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 773                          flags & ~CIFSSEC_MASK);
 774                 return -EINVAL;
 775         }
 776
 777         cifs_security_flags_handle_must_flags(&flags);
 778
 779         /* flags look ok - update the global security flags for cifs module */
 780         global_secflags = flags;
 781         if (global_secflags & CIFSSEC_MUST_SIGN) {
 782                 /* requiring signing implies signing is allowed */
 783                 global_secflags |= CIFSSEC_MAY_SIGN;
 784                 cifs_dbg(FYI, "packet signing now required\n");
 785         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 786                 cifs_dbg(FYI, "packet signing disabled\n");
 787         }
 788         /* BB should we turn on MAY flags for other MUST options? */
 789         return count;
 790 }
 791
 792 static const struct file_operations cifs_security_flags_proc_fops = {
 793         .open           = cifs_security_flags_proc_open,
 794         .read           = seq_read,
 795         .llseek         = seq_lseek,
 796         .release        = single_release,
 797         .write          = cifs_security_flags_proc_write,
 798 };
 799 #else
 800 inline void cifs_proc_init(void)
 801 {
 802 }
 803
 804 inline void cifs_proc_clean(void)
 805 {
 806 }
 807 #endif /* PROC_FS */