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 void
 130 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 131 {
 132         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 133         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 134
 135         seq_printf(m, "\t\tSpeed: %zu bps\n", iface->speed);
 136         seq_puts(m, "\t\tCapabilities: ");
 137         if (iface->rdma_capable)
 138                 seq_puts(m, "rdma ");
 139         if (iface->rss_capable)
 140                 seq_puts(m, "rss ");
 141         seq_putc(m, '\n');
 142         if (iface->sockaddr.ss_family == AF_INET)
 143                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 144         else if (iface->sockaddr.ss_family == AF_INET6)
 145                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 146 }
 147
 148 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 149 {
 150         struct list_head *tmp1, *tmp2, *tmp3;
 151         struct mid_q_entry *mid_entry;
 152         struct TCP_Server_Info *server;
 153         struct cifs_ses *ses;
 154         struct cifs_tcon *tcon;
 155         int i, j;
 156
 157         seq_puts(m,
 158                     "Display Internal CIFS Data Structures for Debugging\n"
 159                     "---------------------------------------------------\n");
 160         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 161         seq_printf(m, "Features:");
 162 #ifdef CONFIG_CIFS_DFS_UPCALL
 163         seq_printf(m, " dfs");
 164 #endif
 165 #ifdef CONFIG_CIFS_FSCACHE
 166         seq_printf(m, " fscache");
 167 #endif
 168 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 169         seq_printf(m, " lanman");
 170 #endif
 171 #ifdef CONFIG_CIFS_POSIX
 172         seq_printf(m, " posix");
 173 #endif
 174 #ifdef CONFIG_CIFS_UPCALL
 175         seq_printf(m, " spnego");
 176 #endif
 177 #ifdef CONFIG_CIFS_XATTR
 178         seq_printf(m, " xattr");
 179 #endif
 180 #ifdef CONFIG_CIFS_ACL
 181         seq_printf(m, " acl");
 182 #endif
 183         seq_putc(m, '\n');
 184         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 185         seq_printf(m, "Servers:");
 186
 187         i = 0;
 188         spin_lock(&cifs_tcp_ses_lock);
 189         list_for_each(tmp1, &cifs_tcp_ses_list) {
 190                 server = list_entry(tmp1, struct TCP_Server_Info,
 191                                     tcp_ses_list);
 192
 193 #ifdef CONFIG_CIFS_SMB_DIRECT
 194                 if (!server->rdma)
 195                         goto skip_rdma;
 196
 197                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 198                         "transport status: %x",
 199                         server->smbd_conn->protocol,
 200                         server->smbd_conn->transport_status);
 201                 seq_printf(m, "\nConn receive_credit_max: %x "
 202                         "send_credit_target: %x max_send_size: %x",
 203                         server->smbd_conn->receive_credit_max,
 204                         server->smbd_conn->send_credit_target,
 205                         server->smbd_conn->max_send_size);
 206                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 207                         "max_fragmented_send_size: %x max_receive_size:%x",
 208                         server->smbd_conn->max_fragmented_recv_size,
 209                         server->smbd_conn->max_fragmented_send_size,
 210                         server->smbd_conn->max_receive_size);
 211                 seq_printf(m, "\nConn keep_alive_interval: %x "
 212                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 213                         server->smbd_conn->keep_alive_interval,
 214                         server->smbd_conn->max_readwrite_size,
 215                         server->smbd_conn->rdma_readwrite_threshold);
 216                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 217                         "count_put_receive_buffer: %x count_send_empty: %x",
 218                         server->smbd_conn->count_get_receive_buffer,
 219                         server->smbd_conn->count_put_receive_buffer,
 220                         server->smbd_conn->count_send_empty);
 221                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 222                         "count_enqueue_reassembly_queue: %x "
 223                         "count_dequeue_reassembly_queue: %x "
 224                         "fragment_reassembly_remaining: %x "
 225                         "reassembly_data_length: %x "
 226                         "reassembly_queue_length: %x",
 227                         server->smbd_conn->count_reassembly_queue,
 228                         server->smbd_conn->count_enqueue_reassembly_queue,
 229                         server->smbd_conn->count_dequeue_reassembly_queue,
 230                         server->smbd_conn->fragment_reassembly_remaining,
 231                         server->smbd_conn->reassembly_data_length,
 232                         server->smbd_conn->reassembly_queue_length);
 233                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 234                         "receive_credits: %x receive_credit_target: %x",
 235                         atomic_read(&server->smbd_conn->send_credits),
 236                         atomic_read(&server->smbd_conn->receive_credits),
 237                         server->smbd_conn->receive_credit_target);
 238                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 239                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 240                         atomic_read(&server->smbd_conn->send_pending),
 241                         atomic_read(&server->smbd_conn->send_payload_pending),
 242                         server->smbd_conn->smbd_send_pending,
 243                         server->smbd_conn->smbd_recv_pending);
 244                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 245                         "count_empty_packet_queue: %x",
 246                         server->smbd_conn->count_receive_queue,
 247                         server->smbd_conn->count_empty_packet_queue);
 248                 seq_printf(m, "\nMR responder_resources: %x "
 249                         "max_frmr_depth: %x mr_type: %x",
 250                         server->smbd_conn->responder_resources,
 251                         server->smbd_conn->max_frmr_depth,
 252                         server->smbd_conn->mr_type);
 253                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 254                         atomic_read(&server->smbd_conn->mr_ready_count),
 255                         atomic_read(&server->smbd_conn->mr_used_count));
 256 skip_rdma:
 257 #endif
 258                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 259                         server->credits,  server->dialect);
 260                 if (server->sign)
 261                         seq_printf(m, " signed");
 262 #ifdef CONFIG_CIFS_SMB311
 263                 if (server->posix_ext_supported)
 264                         seq_printf(m, " posix");
 265 #endif /* 3.1.1 */
 266                 i++;
 267                 list_for_each(tmp2, &server->smb_ses_list) {
 268                         ses = list_entry(tmp2, struct cifs_ses,
 269                                          smb_ses_list);
 270                         if ((ses->serverDomain == NULL) ||
 271                                 (ses->serverOS == NULL) ||
 272                                 (ses->serverNOS == NULL)) {
 273                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
 274                                         i, ses->serverName, ses->ses_count,
 275                                         ses->capabilities, ses->status);
 276                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 277                                         seq_printf(m, "Guest\t");
 278                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 279                                         seq_printf(m, "Anonymous\t");
 280                         } else {
 281                                 seq_printf(m,
 282                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 283                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 284                                     " session status: %d\t",
 285                                 i, ses->serverName, ses->serverDomain,
 286                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 287                                 ses->capabilities, ses->status);
 288                         }
 289                         if (server->rdma)
 290                                 seq_printf(m, "RDMA\n\t");
 291                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 292                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 293                                    server->tcpStatus, server->srv_count,
 294                                    server->sec_mode, in_flight(server));
 295
 296 #ifdef CONFIG_CIFS_STATS2
 297                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 298                                 atomic_read(&server->in_send),
 299                                 atomic_read(&server->num_waiters));
 300 #endif
 301
 302                         seq_puts(m, "\n\tShares:");
 303                         j = 0;
 304
 305                         seq_printf(m, "\n\t%d) IPC: ", j);
 306                         if (ses->tcon_ipc)
 307                                 cifs_debug_tcon(m, ses->tcon_ipc);
 308                         else
 309                                 seq_puts(m, "none\n");
 310
 311                         list_for_each(tmp3, &ses->tcon_list) {
 312                                 tcon = list_entry(tmp3, struct cifs_tcon,
 313                                                   tcon_list);
 314                                 ++j;
 315                                 seq_printf(m, "\n\t%d) ", j);
 316                                 cifs_debug_tcon(m, tcon);
 317                         }
 318
 319                         seq_puts(m, "\n\tMIDs:\n");
 320
 321                         spin_lock(&GlobalMid_Lock);
 322                         list_for_each(tmp3, &server->pending_mid_q) {
 323                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 324                                         qhead);
 325                                 seq_printf(m, "\tState: %d com: %d pid:"
 326                                               " %d cbdata: %p mid %llu\n",
 327                                               mid_entry->mid_state,
 328                                               le16_to_cpu(mid_entry->command),
 329                                               mid_entry->pid,
 330                                               mid_entry->callback_data,
 331                                               mid_entry->mid);
 332                         }
 333                         spin_unlock(&GlobalMid_Lock);
 334
 335                         spin_lock(&ses->iface_lock);
 336                         seq_printf(m, "\n\tServer interfaces: %zu\n", ses->iface_count);
 337                         for (j = 0; j < ses->iface_count; j++) {
 338                                 seq_printf(m, "\t%d)\n", j);
 339                                 cifs_dump_iface(m, &ses->iface_list[j]);
 340                         }
 341                         spin_unlock(&ses->iface_lock);
 342                 }
 343         }
 344         spin_unlock(&cifs_tcp_ses_lock);
 345         seq_putc(m, '\n');
 346
 347         /* BB add code to dump additional info such as TCP session info now */
 348         return 0;
 349 }
 350
 351 #ifdef CONFIG_CIFS_STATS
 352 static ssize_t cifs_stats_proc_write(struct file *file,
 353                 const char __user *buffer, size_t count, loff_t *ppos)
 354 {
 355         bool bv;
 356         int rc;
 357         struct list_head *tmp1, *tmp2, *tmp3;
 358         struct TCP_Server_Info *server;
 359         struct cifs_ses *ses;
 360         struct cifs_tcon *tcon;
 361
 362         rc = kstrtobool_from_user(buffer, count, &bv);
 363         if (rc == 0) {
 364 #ifdef CONFIG_CIFS_STATS2
 365                 atomic_set(&totBufAllocCount, 0);
 366                 atomic_set(&totSmBufAllocCount, 0);
 367 #endif /* CONFIG_CIFS_STATS2 */
 368                 spin_lock(&cifs_tcp_ses_lock);
 369                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 370                         server = list_entry(tmp1, struct TCP_Server_Info,
 371                                             tcp_ses_list);
 372                         list_for_each(tmp2, &server->smb_ses_list) {
 373                                 ses = list_entry(tmp2, struct cifs_ses,
 374                                                  smb_ses_list);
 375                                 list_for_each(tmp3, &ses->tcon_list) {
 376                                         tcon = list_entry(tmp3,
 377                                                           struct cifs_tcon,
 378                                                           tcon_list);
 379                                         atomic_set(&tcon->num_smbs_sent, 0);
 380                                         if (server->ops->clear_stats)
 381                                                 server->ops->clear_stats(tcon);
 382                                 }
 383                         }
 384                 }
 385                 spin_unlock(&cifs_tcp_ses_lock);
 386         } else {
 387                 return rc;
 388         }
 389
 390         return count;
 391 }
 392
 393 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 394 {
 395         int i;
 396         struct list_head *tmp1, *tmp2, *tmp3;
 397         struct TCP_Server_Info *server;
 398         struct cifs_ses *ses;
 399         struct cifs_tcon *tcon;
 400
 401         seq_printf(m,
 402                         "Resources in use\nCIFS Session: %d\n",
 403                         sesInfoAllocCount.counter);
 404         seq_printf(m, "Share (unique mount targets): %d\n",
 405                         tconInfoAllocCount.counter);
 406         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 407                         bufAllocCount.counter,
 408                         cifs_min_rcv + tcpSesAllocCount.counter);
 409         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 410                         smBufAllocCount.counter, cifs_min_small);
 411 #ifdef CONFIG_CIFS_STATS2
 412         seq_printf(m, "Total Large %d Small %d Allocations\n",
 413                                 atomic_read(&totBufAllocCount),
 414                                 atomic_read(&totSmBufAllocCount));
 415 #endif /* CONFIG_CIFS_STATS2 */
 416
 417         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 418         seq_printf(m,
 419                 "\n%d session %d share reconnects\n",
 420                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 421
 422         seq_printf(m,
 423                 "Total vfs operations: %d maximum at one time: %d\n",
 424                 GlobalCurrentXid, GlobalMaxActiveXid);
 425
 426         i = 0;
 427         spin_lock(&cifs_tcp_ses_lock);
 428         list_for_each(tmp1, &cifs_tcp_ses_list) {
 429                 server = list_entry(tmp1, struct TCP_Server_Info,
 430                                     tcp_ses_list);
 431                 list_for_each(tmp2, &server->smb_ses_list) {
 432                         ses = list_entry(tmp2, struct cifs_ses,
 433                                          smb_ses_list);
 434                         list_for_each(tmp3, &ses->tcon_list) {
 435                                 tcon = list_entry(tmp3,
 436                                                   struct cifs_tcon,
 437                                                   tcon_list);
 438                                 i++;
 439                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 440                                 if (tcon->need_reconnect)
 441                                         seq_puts(m, "\tDISCONNECTED ");
 442                                 seq_printf(m, "\nSMBs: %d",
 443                                            atomic_read(&tcon->num_smbs_sent));
 444                                 if (server->ops->print_stats)
 445                                         server->ops->print_stats(m, tcon);
 446                         }
 447                 }
 448         }
 449         spin_unlock(&cifs_tcp_ses_lock);
 450
 451         seq_putc(m, '\n');
 452         return 0;
 453 }
 454
 455 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 456 {
 457         return single_open(file, cifs_stats_proc_show, NULL);
 458 }
 459
 460 static const struct file_operations cifs_stats_proc_fops = {
 461         .open           = cifs_stats_proc_open,
 462         .read           = seq_read,
 463         .llseek         = seq_lseek,
 464         .release        = single_release,
 465         .write          = cifs_stats_proc_write,
 466 };
 467 #endif /* STATS */
 468
 469 #ifdef CONFIG_CIFS_SMB_DIRECT
 470 #define PROC_FILE_DEFINE(name) \
 471 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 472         size_t count, loff_t *ppos) \
 473 { \
 474         int rc; \
 475         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 476         if (rc) \
 477                 return rc; \
 478         return count; \
 479 } \
 480 static int name##_proc_show(struct seq_file *m, void *v) \
 481 { \
 482         seq_printf(m, "%d\n", name ); \
 483         return 0; \
 484 } \
 485 static int name##_open(struct inode *inode, struct file *file) \
 486 { \
 487         return single_open(file, name##_proc_show, NULL); \
 488 } \
 489 \
 490 static const struct file_operations cifs_##name##_proc_fops = { \
 491         .open           = name##_open, \
 492         .read           = seq_read, \
 493         .llseek         = seq_lseek, \
 494         .release        = single_release, \
 495         .write          = name##_write, \
 496 }
 497
 498 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 499 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 500 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 501 PROC_FILE_DEFINE(smbd_max_receive_size);
 502 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 503 PROC_FILE_DEFINE(smbd_max_send_size);
 504 PROC_FILE_DEFINE(smbd_send_credit_target);
 505 PROC_FILE_DEFINE(smbd_receive_credit_max);
 506 #endif
 507
 508 static struct proc_dir_entry *proc_fs_cifs;
 509 static const struct file_operations cifsFYI_proc_fops;
 510 static const struct file_operations cifs_lookup_cache_proc_fops;
 511 static const struct file_operations traceSMB_proc_fops;
 512 static const struct file_operations cifs_security_flags_proc_fops;
 513 static const struct file_operations cifs_linux_ext_proc_fops;
 514
 515 void
 516 cifs_proc_init(void)
 517 {
 518         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 519         if (proc_fs_cifs == NULL)
 520                 return;
 521
 522         proc_create_single("DebugData", 0, proc_fs_cifs,
 523                         cifs_debug_data_proc_show);
 524
 525 #ifdef CONFIG_CIFS_STATS
 526         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 527 #endif /* STATS */
 528         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 529         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 530         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 531                     &cifs_linux_ext_proc_fops);
 532         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 533                     &cifs_security_flags_proc_fops);
 534         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 535                     &cifs_lookup_cache_proc_fops);
 536 #ifdef CONFIG_CIFS_SMB_DIRECT
 537         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 538                 &cifs_rdma_readwrite_threshold_proc_fops);
 539         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 540                 &cifs_smbd_max_frmr_depth_proc_fops);
 541         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 542                 &cifs_smbd_keep_alive_interval_proc_fops);
 543         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 544                 &cifs_smbd_max_receive_size_proc_fops);
 545         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 546                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 547         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 548                 &cifs_smbd_max_send_size_proc_fops);
 549         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 550                 &cifs_smbd_send_credit_target_proc_fops);
 551         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 552                 &cifs_smbd_receive_credit_max_proc_fops);
 553 #endif
 554 }
 555
 556 void
 557 cifs_proc_clean(void)
 558 {
 559         if (proc_fs_cifs == NULL)
 560                 return;
 561
 562         remove_proc_entry("DebugData", proc_fs_cifs);
 563         remove_proc_entry("cifsFYI", proc_fs_cifs);
 564         remove_proc_entry("traceSMB", proc_fs_cifs);
 565 #ifdef CONFIG_CIFS_STATS
 566         remove_proc_entry("Stats", proc_fs_cifs);
 567 #endif
 568         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 569         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 570         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 571 #ifdef CONFIG_CIFS_SMB_DIRECT
 572         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 573         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 574         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 575         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 576         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 577         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 578         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 579         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 580 #endif
 581         remove_proc_entry("fs/cifs", NULL);
 582 }
 583
 584 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 585 {
 586         seq_printf(m, "%d\n", cifsFYI);
 587         return 0;
 588 }
 589
 590 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 591 {
 592         return single_open(file, cifsFYI_proc_show, NULL);
 593 }
 594
 595 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 596                 size_t count, loff_t *ppos)
 597 {
 598         char c[2] = { '\0' };
 599         bool bv;
 600         int rc;
 601
 602         rc = get_user(c[0], buffer);
 603         if (rc)
 604                 return rc;
 605         if (strtobool(c, &bv) == 0)
 606                 cifsFYI = bv;
 607         else if ((c[0] > '1') && (c[0] <= '9'))
 608                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 609         else
 610                 return -EINVAL;
 611
 612         return count;
 613 }
 614
 615 static const struct file_operations cifsFYI_proc_fops = {
 616         .open           = cifsFYI_proc_open,
 617         .read           = seq_read,
 618         .llseek         = seq_lseek,
 619         .release        = single_release,
 620         .write          = cifsFYI_proc_write,
 621 };
 622
 623 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 624 {
 625         seq_printf(m, "%d\n", linuxExtEnabled);
 626         return 0;
 627 }
 628
 629 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 630 {
 631         return single_open(file, cifs_linux_ext_proc_show, NULL);
 632 }
 633
 634 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 635                 const char __user *buffer, size_t count, loff_t *ppos)
 636 {
 637         int rc;
 638
 639         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 640         if (rc)
 641                 return rc;
 642
 643         return count;
 644 }
 645
 646 static const struct file_operations cifs_linux_ext_proc_fops = {
 647         .open           = cifs_linux_ext_proc_open,
 648         .read           = seq_read,
 649         .llseek         = seq_lseek,
 650         .release        = single_release,
 651         .write          = cifs_linux_ext_proc_write,
 652 };
 653
 654 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 655 {
 656         seq_printf(m, "%d\n", lookupCacheEnabled);
 657         return 0;
 658 }
 659
 660 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 661 {
 662         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 663 }
 664
 665 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 666                 const char __user *buffer, size_t count, loff_t *ppos)
 667 {
 668         int rc;
 669
 670         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 671         if (rc)
 672                 return rc;
 673
 674         return count;
 675 }
 676
 677 static const struct file_operations cifs_lookup_cache_proc_fops = {
 678         .open           = cifs_lookup_cache_proc_open,
 679         .read           = seq_read,
 680         .llseek         = seq_lseek,
 681         .release        = single_release,
 682         .write          = cifs_lookup_cache_proc_write,
 683 };
 684
 685 static int traceSMB_proc_show(struct seq_file *m, void *v)
 686 {
 687         seq_printf(m, "%d\n", traceSMB);
 688         return 0;
 689 }
 690
 691 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 692 {
 693         return single_open(file, traceSMB_proc_show, NULL);
 694 }
 695
 696 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 697                 size_t count, loff_t *ppos)
 698 {
 699         int rc;
 700
 701         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 702         if (rc)
 703                 return rc;
 704
 705         return count;
 706 }
 707
 708 static const struct file_operations traceSMB_proc_fops = {
 709         .open           = traceSMB_proc_open,
 710         .read           = seq_read,
 711         .llseek         = seq_lseek,
 712         .release        = single_release,
 713         .write          = traceSMB_proc_write,
 714 };
 715
 716 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 717 {
 718         seq_printf(m, "0x%x\n", global_secflags);
 719         return 0;
 720 }
 721
 722 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 723 {
 724         return single_open(file, cifs_security_flags_proc_show, NULL);
 725 }
 726
 727 /*
 728  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 729  * flags except for the ones corresponding to the given MUST flag. If there are
 730  * multiple MUST flags, then try to prefer more secure ones.
 731  */
 732 static void
 733 cifs_security_flags_handle_must_flags(unsigned int *flags)
 734 {
 735         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 736
 737         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 738                 *flags = CIFSSEC_MUST_KRB5;
 739         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 740                 *flags = CIFSSEC_MUST_NTLMSSP;
 741         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 742                 *flags = CIFSSEC_MUST_NTLMV2;
 743         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 744                 *flags = CIFSSEC_MUST_NTLM;
 745         else if (CIFSSEC_MUST_LANMAN &&
 746                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 747                 *flags = CIFSSEC_MUST_LANMAN;
 748         else if (CIFSSEC_MUST_PLNTXT &&
 749                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 750                 *flags = CIFSSEC_MUST_PLNTXT;
 751
 752         *flags |= signflags;
 753 }
 754
 755 static ssize_t cifs_security_flags_proc_write(struct file *file,
 756                 const char __user *buffer, size_t count, loff_t *ppos)
 757 {
 758         int rc;
 759         unsigned int flags;
 760         char flags_string[12];
 761         bool bv;
 762
 763         if ((count < 1) || (count > 11))
 764                 return -EINVAL;
 765
 766         memset(flags_string, 0, 12);
 767
 768         if (copy_from_user(flags_string, buffer, count))
 769                 return -EFAULT;
 770
 771         if (count < 3) {
 772                 /* single char or single char followed by null */
 773                 if (strtobool(flags_string, &bv) == 0) {
 774                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 775                         return count;
 776                 } else if (!isdigit(flags_string[0])) {
 777                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 778                                         flags_string);
 779                         return -EINVAL;
 780                 }
 781         }
 782
 783         /* else we have a number */
 784         rc = kstrtouint(flags_string, 0, &flags);
 785         if (rc) {
 786                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 787                                 flags_string);
 788                 return rc;
 789         }
 790
 791         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 792
 793         if (flags == 0)  {
 794                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 795                 return -EINVAL;
 796         }
 797
 798         if (flags & ~CIFSSEC_MASK) {
 799                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 800                          flags & ~CIFSSEC_MASK);
 801                 return -EINVAL;
 802         }
 803
 804         cifs_security_flags_handle_must_flags(&flags);
 805
 806         /* flags look ok - update the global security flags for cifs module */
 807         global_secflags = flags;
 808         if (global_secflags & CIFSSEC_MUST_SIGN) {
 809                 /* requiring signing implies signing is allowed */
 810                 global_secflags |= CIFSSEC_MAY_SIGN;
 811                 cifs_dbg(FYI, "packet signing now required\n");
 812         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 813                 cifs_dbg(FYI, "packet signing disabled\n");
 814         }
 815         /* BB should we turn on MAY flags for other MUST options? */
 816         return count;
 817 }
 818
 819 static const struct file_operations cifs_security_flags_proc_fops = {
 820         .open           = cifs_security_flags_proc_open,
 821         .read           = seq_read,
 822         .llseek         = seq_lseek,
 823         .release        = single_release,
 824         .write          = cifs_security_flags_proc_write,
 825 };
 826 #else
 827 inline void cifs_proc_init(void)
 828 {
 829 }
 830
 831 inline void cifs_proc_clean(void)
 832 {
 833 }
 834 #endif /* PROC_FS */