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_SMB_DIRECT
 169         seq_printf(m, ",SMB_DIRECT");
 170 #endif
 171 #ifdef CONFIG_CIFS_STATS2
 172         seq_printf(m, ",STATS2");
 173 #elif defined(CONFIG_CIFS_STATS)
 174         seq_printf(m, ",STATS");
 175 #endif
 176 #ifdef CONFIG_CIFS_DEBUG2
 177         seq_printf(m, ",DEBUG2");
 178 #elif defined(CONFIG_CIFS_DEBUG)
 179         seq_printf(m, ",DEBUG");
 180 #endif
 181 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 182         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 183 #endif
 184 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 185         seq_printf(m, ",WEAK_PW_HASH");
 186 #endif
 187 #ifdef CONFIG_CIFS_POSIX
 188         seq_printf(m, ",CIFS_POSIX");
 189 #endif
 190 #ifdef CONFIG_CIFS_UPCALL
 191         seq_printf(m, ",UPCALL(SPNEGO)");
 192 #endif
 193 #ifdef CONFIG_CIFS_XATTR
 194         seq_printf(m, ",XATTR");
 195 #endif
 196 #ifdef CONFIG_CIFS_ACL
 197         seq_printf(m, ",ACL");
 198 #endif
 199         seq_putc(m, '\n');
 200         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 201         seq_printf(m, "Servers:");
 202
 203         i = 0;
 204         spin_lock(&cifs_tcp_ses_lock);
 205         list_for_each(tmp1, &cifs_tcp_ses_list) {
 206                 server = list_entry(tmp1, struct TCP_Server_Info,
 207                                     tcp_ses_list);
 208
 209 #ifdef CONFIG_CIFS_SMB_DIRECT
 210                 if (!server->rdma)
 211                         goto skip_rdma;
 212
 213                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 214                         "transport status: %x",
 215                         server->smbd_conn->protocol,
 216                         server->smbd_conn->transport_status);
 217                 seq_printf(m, "\nConn receive_credit_max: %x "
 218                         "send_credit_target: %x max_send_size: %x",
 219                         server->smbd_conn->receive_credit_max,
 220                         server->smbd_conn->send_credit_target,
 221                         server->smbd_conn->max_send_size);
 222                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 223                         "max_fragmented_send_size: %x max_receive_size:%x",
 224                         server->smbd_conn->max_fragmented_recv_size,
 225                         server->smbd_conn->max_fragmented_send_size,
 226                         server->smbd_conn->max_receive_size);
 227                 seq_printf(m, "\nConn keep_alive_interval: %x "
 228                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 229                         server->smbd_conn->keep_alive_interval,
 230                         server->smbd_conn->max_readwrite_size,
 231                         server->smbd_conn->rdma_readwrite_threshold);
 232                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 233                         "count_put_receive_buffer: %x count_send_empty: %x",
 234                         server->smbd_conn->count_get_receive_buffer,
 235                         server->smbd_conn->count_put_receive_buffer,
 236                         server->smbd_conn->count_send_empty);
 237                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 238                         "count_enqueue_reassembly_queue: %x "
 239                         "count_dequeue_reassembly_queue: %x "
 240                         "fragment_reassembly_remaining: %x "
 241                         "reassembly_data_length: %x "
 242                         "reassembly_queue_length: %x",
 243                         server->smbd_conn->count_reassembly_queue,
 244                         server->smbd_conn->count_enqueue_reassembly_queue,
 245                         server->smbd_conn->count_dequeue_reassembly_queue,
 246                         server->smbd_conn->fragment_reassembly_remaining,
 247                         server->smbd_conn->reassembly_data_length,
 248                         server->smbd_conn->reassembly_queue_length);
 249                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 250                         "receive_credits: %x receive_credit_target: %x",
 251                         atomic_read(&server->smbd_conn->send_credits),
 252                         atomic_read(&server->smbd_conn->receive_credits),
 253                         server->smbd_conn->receive_credit_target);
 254                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 255                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 256                         atomic_read(&server->smbd_conn->send_pending),
 257                         atomic_read(&server->smbd_conn->send_payload_pending),
 258                         server->smbd_conn->smbd_send_pending,
 259                         server->smbd_conn->smbd_recv_pending);
 260                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 261                         "count_empty_packet_queue: %x",
 262                         server->smbd_conn->count_receive_queue,
 263                         server->smbd_conn->count_empty_packet_queue);
 264                 seq_printf(m, "\nMR responder_resources: %x "
 265                         "max_frmr_depth: %x mr_type: %x",
 266                         server->smbd_conn->responder_resources,
 267                         server->smbd_conn->max_frmr_depth,
 268                         server->smbd_conn->mr_type);
 269                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 270                         atomic_read(&server->smbd_conn->mr_ready_count),
 271                         atomic_read(&server->smbd_conn->mr_used_count));
 272 skip_rdma:
 273 #endif
 274                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 275                         server->credits,  server->dialect);
 276                 if (server->sign)
 277                         seq_printf(m, " signed");
 278                 if (server->posix_ext_supported)
 279                         seq_printf(m, " posix");
 280
 281                 i++;
 282                 list_for_each(tmp2, &server->smb_ses_list) {
 283                         ses = list_entry(tmp2, struct cifs_ses,
 284                                          smb_ses_list);
 285                         if ((ses->serverDomain == NULL) ||
 286                                 (ses->serverOS == NULL) ||
 287                                 (ses->serverNOS == NULL)) {
 288                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
 289                                         i, ses->serverName, ses->ses_count,
 290                                         ses->capabilities, ses->status);
 291                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 292                                         seq_printf(m, "Guest\t");
 293                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 294                                         seq_printf(m, "Anonymous\t");
 295                         } else {
 296                                 seq_printf(m,
 297                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 298                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 299                                     " session status: %d\t",
 300                                 i, ses->serverName, ses->serverDomain,
 301                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 302                                 ses->capabilities, ses->status);
 303                         }
 304                         if (server->rdma)
 305                                 seq_printf(m, "RDMA\n\t");
 306                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 307                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 308                                    server->tcpStatus, server->srv_count,
 309                                    server->sec_mode, in_flight(server));
 310
 311 #ifdef CONFIG_CIFS_STATS2
 312                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 313                                 atomic_read(&server->in_send),
 314                                 atomic_read(&server->num_waiters));
 315 #endif
 316
 317                         seq_puts(m, "\n\tShares:");
 318                         j = 0;
 319
 320                         seq_printf(m, "\n\t%d) IPC: ", j);
 321                         if (ses->tcon_ipc)
 322                                 cifs_debug_tcon(m, ses->tcon_ipc);
 323                         else
 324                                 seq_puts(m, "none\n");
 325
 326                         list_for_each(tmp3, &ses->tcon_list) {
 327                                 tcon = list_entry(tmp3, struct cifs_tcon,
 328                                                   tcon_list);
 329                                 ++j;
 330                                 seq_printf(m, "\n\t%d) ", j);
 331                                 cifs_debug_tcon(m, tcon);
 332                         }
 333
 334                         seq_puts(m, "\n\tMIDs:\n");
 335
 336                         spin_lock(&GlobalMid_Lock);
 337                         list_for_each(tmp3, &server->pending_mid_q) {
 338                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 339                                         qhead);
 340                                 seq_printf(m, "\tState: %d com: %d pid:"
 341                                               " %d cbdata: %p mid %llu\n",
 342                                               mid_entry->mid_state,
 343                                               le16_to_cpu(mid_entry->command),
 344                                               mid_entry->pid,
 345                                               mid_entry->callback_data,
 346                                               mid_entry->mid);
 347                         }
 348                         spin_unlock(&GlobalMid_Lock);
 349
 350                         spin_lock(&ses->iface_lock);
 351                         if (ses->iface_count)
 352                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 353                                            ses->iface_count);
 354                         for (j = 0; j < ses->iface_count; j++) {
 355                                 seq_printf(m, "\t%d)\n", j);
 356                                 cifs_dump_iface(m, &ses->iface_list[j]);
 357                         }
 358                         spin_unlock(&ses->iface_lock);
 359                 }
 360         }
 361         spin_unlock(&cifs_tcp_ses_lock);
 362         seq_putc(m, '\n');
 363
 364         /* BB add code to dump additional info such as TCP session info now */
 365         return 0;
 366 }
 367
 368 static ssize_t cifs_stats_proc_write(struct file *file,
 369                 const char __user *buffer, size_t count, loff_t *ppos)
 370 {
 371         bool bv;
 372         int rc;
 373         struct list_head *tmp1, *tmp2, *tmp3;
 374         struct TCP_Server_Info *server;
 375         struct cifs_ses *ses;
 376         struct cifs_tcon *tcon;
 377
 378         rc = kstrtobool_from_user(buffer, count, &bv);
 379         if (rc == 0) {
 380 #ifdef CONFIG_CIFS_STATS2
 381                 atomic_set(&totBufAllocCount, 0);
 382                 atomic_set(&totSmBufAllocCount, 0);
 383 #endif /* CONFIG_CIFS_STATS2 */
 384                 spin_lock(&cifs_tcp_ses_lock);
 385                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 386                         server = list_entry(tmp1, struct TCP_Server_Info,
 387                                             tcp_ses_list);
 388                         list_for_each(tmp2, &server->smb_ses_list) {
 389                                 ses = list_entry(tmp2, struct cifs_ses,
 390                                                  smb_ses_list);
 391                                 list_for_each(tmp3, &ses->tcon_list) {
 392                                         tcon = list_entry(tmp3,
 393                                                           struct cifs_tcon,
 394                                                           tcon_list);
 395                                         atomic_set(&tcon->num_smbs_sent, 0);
 396                                         if (server->ops->clear_stats)
 397                                                 server->ops->clear_stats(tcon);
 398                                 }
 399                         }
 400                 }
 401                 spin_unlock(&cifs_tcp_ses_lock);
 402         } else {
 403                 return rc;
 404         }
 405
 406         return count;
 407 }
 408
 409 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 410 {
 411         int i;
 412         struct list_head *tmp1, *tmp2, *tmp3;
 413         struct TCP_Server_Info *server;
 414         struct cifs_ses *ses;
 415         struct cifs_tcon *tcon;
 416
 417         seq_printf(m,
 418                         "Resources in use\nCIFS Session: %d\n",
 419                         sesInfoAllocCount.counter);
 420         seq_printf(m, "Share (unique mount targets): %d\n",
 421                         tconInfoAllocCount.counter);
 422         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 423                         bufAllocCount.counter,
 424                         cifs_min_rcv + tcpSesAllocCount.counter);
 425         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 426                         smBufAllocCount.counter, cifs_min_small);
 427 #ifdef CONFIG_CIFS_STATS2
 428         seq_printf(m, "Total Large %d Small %d Allocations\n",
 429                                 atomic_read(&totBufAllocCount),
 430                                 atomic_read(&totSmBufAllocCount));
 431 #endif /* CONFIG_CIFS_STATS2 */
 432
 433         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 434         seq_printf(m,
 435                 "\n%d session %d share reconnects\n",
 436                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 437
 438         seq_printf(m,
 439                 "Total vfs operations: %d maximum at one time: %d\n",
 440                 GlobalCurrentXid, GlobalMaxActiveXid);
 441
 442         i = 0;
 443         spin_lock(&cifs_tcp_ses_lock);
 444         list_for_each(tmp1, &cifs_tcp_ses_list) {
 445                 server = list_entry(tmp1, struct TCP_Server_Info,
 446                                     tcp_ses_list);
 447                 list_for_each(tmp2, &server->smb_ses_list) {
 448                         ses = list_entry(tmp2, struct cifs_ses,
 449                                          smb_ses_list);
 450                         list_for_each(tmp3, &ses->tcon_list) {
 451                                 tcon = list_entry(tmp3,
 452                                                   struct cifs_tcon,
 453                                                   tcon_list);
 454                                 i++;
 455                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 456                                 if (tcon->need_reconnect)
 457                                         seq_puts(m, "\tDISCONNECTED ");
 458                                 seq_printf(m, "\nSMBs: %d",
 459                                            atomic_read(&tcon->num_smbs_sent));
 460                                 if (server->ops->print_stats)
 461                                         server->ops->print_stats(m, tcon);
 462                         }
 463                 }
 464         }
 465         spin_unlock(&cifs_tcp_ses_lock);
 466
 467         seq_putc(m, '\n');
 468         return 0;
 469 }
 470
 471 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 472 {
 473         return single_open(file, cifs_stats_proc_show, NULL);
 474 }
 475
 476 static const struct file_operations cifs_stats_proc_fops = {
 477         .open           = cifs_stats_proc_open,
 478         .read           = seq_read,
 479         .llseek         = seq_lseek,
 480         .release        = single_release,
 481         .write          = cifs_stats_proc_write,
 482 };
 483
 484 #ifdef CONFIG_CIFS_SMB_DIRECT
 485 #define PROC_FILE_DEFINE(name) \
 486 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 487         size_t count, loff_t *ppos) \
 488 { \
 489         int rc; \
 490         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 491         if (rc) \
 492                 return rc; \
 493         return count; \
 494 } \
 495 static int name##_proc_show(struct seq_file *m, void *v) \
 496 { \
 497         seq_printf(m, "%d\n", name ); \
 498         return 0; \
 499 } \
 500 static int name##_open(struct inode *inode, struct file *file) \
 501 { \
 502         return single_open(file, name##_proc_show, NULL); \
 503 } \
 504 \
 505 static const struct file_operations cifs_##name##_proc_fops = { \
 506         .open           = name##_open, \
 507         .read           = seq_read, \
 508         .llseek         = seq_lseek, \
 509         .release        = single_release, \
 510         .write          = name##_write, \
 511 }
 512
 513 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 514 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 515 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 516 PROC_FILE_DEFINE(smbd_max_receive_size);
 517 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 518 PROC_FILE_DEFINE(smbd_max_send_size);
 519 PROC_FILE_DEFINE(smbd_send_credit_target);
 520 PROC_FILE_DEFINE(smbd_receive_credit_max);
 521 #endif
 522
 523 static struct proc_dir_entry *proc_fs_cifs;
 524 static const struct file_operations cifsFYI_proc_fops;
 525 static const struct file_operations cifs_lookup_cache_proc_fops;
 526 static const struct file_operations traceSMB_proc_fops;
 527 static const struct file_operations cifs_security_flags_proc_fops;
 528 static const struct file_operations cifs_linux_ext_proc_fops;
 529
 530 void
 531 cifs_proc_init(void)
 532 {
 533         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 534         if (proc_fs_cifs == NULL)
 535                 return;
 536
 537         proc_create_single("DebugData", 0, proc_fs_cifs,
 538                         cifs_debug_data_proc_show);
 539
 540         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 541         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 542         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 543         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 544                     &cifs_linux_ext_proc_fops);
 545         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 546                     &cifs_security_flags_proc_fops);
 547         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 548                     &cifs_lookup_cache_proc_fops);
 549 #ifdef CONFIG_CIFS_SMB_DIRECT
 550         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 551                 &cifs_rdma_readwrite_threshold_proc_fops);
 552         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 553                 &cifs_smbd_max_frmr_depth_proc_fops);
 554         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 555                 &cifs_smbd_keep_alive_interval_proc_fops);
 556         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 557                 &cifs_smbd_max_receive_size_proc_fops);
 558         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 559                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 560         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 561                 &cifs_smbd_max_send_size_proc_fops);
 562         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 563                 &cifs_smbd_send_credit_target_proc_fops);
 564         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 565                 &cifs_smbd_receive_credit_max_proc_fops);
 566 #endif
 567 }
 568
 569 void
 570 cifs_proc_clean(void)
 571 {
 572         if (proc_fs_cifs == NULL)
 573                 return;
 574
 575         remove_proc_entry("DebugData", proc_fs_cifs);
 576         remove_proc_entry("cifsFYI", proc_fs_cifs);
 577         remove_proc_entry("traceSMB", proc_fs_cifs);
 578         remove_proc_entry("Stats", proc_fs_cifs);
 579         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 580         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 581         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 582 #ifdef CONFIG_CIFS_SMB_DIRECT
 583         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 584         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 585         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 586         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 587         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 588         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 589         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 590         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 591 #endif
 592         remove_proc_entry("fs/cifs", NULL);
 593 }
 594
 595 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 596 {
 597         seq_printf(m, "%d\n", cifsFYI);
 598         return 0;
 599 }
 600
 601 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 602 {
 603         return single_open(file, cifsFYI_proc_show, NULL);
 604 }
 605
 606 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 607                 size_t count, loff_t *ppos)
 608 {
 609         char c[2] = { '\0' };
 610         bool bv;
 611         int rc;
 612
 613         rc = get_user(c[0], buffer);
 614         if (rc)
 615                 return rc;
 616         if (strtobool(c, &bv) == 0)
 617                 cifsFYI = bv;
 618         else if ((c[0] > '1') && (c[0] <= '9'))
 619                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 620         else
 621                 return -EINVAL;
 622
 623         return count;
 624 }
 625
 626 static const struct file_operations cifsFYI_proc_fops = {
 627         .open           = cifsFYI_proc_open,
 628         .read           = seq_read,
 629         .llseek         = seq_lseek,
 630         .release        = single_release,
 631         .write          = cifsFYI_proc_write,
 632 };
 633
 634 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 635 {
 636         seq_printf(m, "%d\n", linuxExtEnabled);
 637         return 0;
 638 }
 639
 640 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 641 {
 642         return single_open(file, cifs_linux_ext_proc_show, NULL);
 643 }
 644
 645 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 646                 const char __user *buffer, size_t count, loff_t *ppos)
 647 {
 648         int rc;
 649
 650         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 651         if (rc)
 652                 return rc;
 653
 654         return count;
 655 }
 656
 657 static const struct file_operations cifs_linux_ext_proc_fops = {
 658         .open           = cifs_linux_ext_proc_open,
 659         .read           = seq_read,
 660         .llseek         = seq_lseek,
 661         .release        = single_release,
 662         .write          = cifs_linux_ext_proc_write,
 663 };
 664
 665 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 666 {
 667         seq_printf(m, "%d\n", lookupCacheEnabled);
 668         return 0;
 669 }
 670
 671 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 672 {
 673         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 674 }
 675
 676 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 677                 const char __user *buffer, size_t count, loff_t *ppos)
 678 {
 679         int rc;
 680
 681         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 682         if (rc)
 683                 return rc;
 684
 685         return count;
 686 }
 687
 688 static const struct file_operations cifs_lookup_cache_proc_fops = {
 689         .open           = cifs_lookup_cache_proc_open,
 690         .read           = seq_read,
 691         .llseek         = seq_lseek,
 692         .release        = single_release,
 693         .write          = cifs_lookup_cache_proc_write,
 694 };
 695
 696 static int traceSMB_proc_show(struct seq_file *m, void *v)
 697 {
 698         seq_printf(m, "%d\n", traceSMB);
 699         return 0;
 700 }
 701
 702 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 703 {
 704         return single_open(file, traceSMB_proc_show, NULL);
 705 }
 706
 707 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 708                 size_t count, loff_t *ppos)
 709 {
 710         int rc;
 711
 712         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 713         if (rc)
 714                 return rc;
 715
 716         return count;
 717 }
 718
 719 static const struct file_operations traceSMB_proc_fops = {
 720         .open           = traceSMB_proc_open,
 721         .read           = seq_read,
 722         .llseek         = seq_lseek,
 723         .release        = single_release,
 724         .write          = traceSMB_proc_write,
 725 };
 726
 727 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 728 {
 729         seq_printf(m, "0x%x\n", global_secflags);
 730         return 0;
 731 }
 732
 733 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 734 {
 735         return single_open(file, cifs_security_flags_proc_show, NULL);
 736 }
 737
 738 /*
 739  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 740  * flags except for the ones corresponding to the given MUST flag. If there are
 741  * multiple MUST flags, then try to prefer more secure ones.
 742  */
 743 static void
 744 cifs_security_flags_handle_must_flags(unsigned int *flags)
 745 {
 746         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 747
 748         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 749                 *flags = CIFSSEC_MUST_KRB5;
 750         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 751                 *flags = CIFSSEC_MUST_NTLMSSP;
 752         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 753                 *flags = CIFSSEC_MUST_NTLMV2;
 754         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 755                 *flags = CIFSSEC_MUST_NTLM;
 756         else if (CIFSSEC_MUST_LANMAN &&
 757                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 758                 *flags = CIFSSEC_MUST_LANMAN;
 759         else if (CIFSSEC_MUST_PLNTXT &&
 760                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 761                 *flags = CIFSSEC_MUST_PLNTXT;
 762
 763         *flags |= signflags;
 764 }
 765
 766 static ssize_t cifs_security_flags_proc_write(struct file *file,
 767                 const char __user *buffer, size_t count, loff_t *ppos)
 768 {
 769         int rc;
 770         unsigned int flags;
 771         char flags_string[12];
 772         bool bv;
 773
 774         if ((count < 1) || (count > 11))
 775                 return -EINVAL;
 776
 777         memset(flags_string, 0, 12);
 778
 779         if (copy_from_user(flags_string, buffer, count))
 780                 return -EFAULT;
 781
 782         if (count < 3) {
 783                 /* single char or single char followed by null */
 784                 if (strtobool(flags_string, &bv) == 0) {
 785                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 786                         return count;
 787                 } else if (!isdigit(flags_string[0])) {
 788                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 789                                         flags_string);
 790                         return -EINVAL;
 791                 }
 792         }
 793
 794         /* else we have a number */
 795         rc = kstrtouint(flags_string, 0, &flags);
 796         if (rc) {
 797                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 798                                 flags_string);
 799                 return rc;
 800         }
 801
 802         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 803
 804         if (flags == 0)  {
 805                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 806                 return -EINVAL;
 807         }
 808
 809         if (flags & ~CIFSSEC_MASK) {
 810                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 811                          flags & ~CIFSSEC_MASK);
 812                 return -EINVAL;
 813         }
 814
 815         cifs_security_flags_handle_must_flags(&flags);
 816
 817         /* flags look ok - update the global security flags for cifs module */
 818         global_secflags = flags;
 819         if (global_secflags & CIFSSEC_MUST_SIGN) {
 820                 /* requiring signing implies signing is allowed */
 821                 global_secflags |= CIFSSEC_MAY_SIGN;
 822                 cifs_dbg(FYI, "packet signing now required\n");
 823         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 824                 cifs_dbg(FYI, "packet signing disabled\n");
 825         }
 826         /* BB should we turn on MAY flags for other MUST options? */
 827         return count;
 828 }
 829
 830 static const struct file_operations cifs_security_flags_proc_fops = {
 831         .open           = cifs_security_flags_proc_open,
 832         .read           = seq_read,
 833         .llseek         = seq_lseek,
 834         .release        = single_release,
 835         .write          = cifs_security_flags_proc_write,
 836 };
 837 #else
 838 inline void cifs_proc_init(void)
 839 {
 840 }
 841
 842 inline void cifs_proc_clean(void)
 843 {
 844 }
 845 #endif /* PROC_FS */