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 ([email protected])
   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 #else
 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                 int i;
 382
 383                 atomic_set(&totBufAllocCount, 0);
 384                 atomic_set(&totSmBufAllocCount, 0);
 385 #endif /* CONFIG_CIFS_STATS2 */
 386                 spin_lock(&GlobalMid_Lock);
 387                 GlobalMaxActiveXid = 0;
 388                 GlobalCurrentXid = 0;
 389                 spin_unlock(&GlobalMid_Lock);
 390                 spin_lock(&cifs_tcp_ses_lock);
 391                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 392                         server = list_entry(tmp1, struct TCP_Server_Info,
 393                                             tcp_ses_list);
 394 #ifdef CONFIG_CIFS_STATS2
 395                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
 396                                 atomic_set(&server->smb2slowcmd[i], 0);
 397 #endif /* CONFIG_CIFS_STATS2 */
 398                         list_for_each(tmp2, &server->smb_ses_list) {
 399                                 ses = list_entry(tmp2, struct cifs_ses,
 400                                                  smb_ses_list);
 401                                 list_for_each(tmp3, &ses->tcon_list) {
 402                                         tcon = list_entry(tmp3,
 403                                                           struct cifs_tcon,
 404                                                           tcon_list);
 405                                         atomic_set(&tcon->num_smbs_sent, 0);
 406                                         spin_lock(&tcon->stat_lock);
 407                                         tcon->bytes_read = 0;
 408                                         tcon->bytes_written = 0;
 409                                         spin_unlock(&tcon->stat_lock);
 410                                         if (server->ops->clear_stats)
 411                                                 server->ops->clear_stats(tcon);
 412                                 }
 413                         }
 414                 }
 415                 spin_unlock(&cifs_tcp_ses_lock);
 416         } else {
 417                 return rc;
 418         }
 419
 420         return count;
 421 }
 422
 423 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 424 {
 425         int i;
 426 #ifdef CONFIG_CIFS_STATS2
 427         int j;
 428 #endif /* STATS2 */
 429         struct list_head *tmp1, *tmp2, *tmp3;
 430         struct TCP_Server_Info *server;
 431         struct cifs_ses *ses;
 432         struct cifs_tcon *tcon;
 433
 434         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 435                         sesInfoAllocCount.counter);
 436         seq_printf(m, "Share (unique mount targets): %d\n",
 437                         tconInfoAllocCount.counter);
 438         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 439                         bufAllocCount.counter,
 440                         cifs_min_rcv + tcpSesAllocCount.counter);
 441         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 442                         smBufAllocCount.counter, cifs_min_small);
 443 #ifdef CONFIG_CIFS_STATS2
 444         seq_printf(m, "Total Large %d Small %d Allocations\n",
 445                                 atomic_read(&totBufAllocCount),
 446                                 atomic_read(&totSmBufAllocCount));
 447 #endif /* CONFIG_CIFS_STATS2 */
 448
 449         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 450         seq_printf(m,
 451                 "\n%d session %d share reconnects\n",
 452                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 453
 454         seq_printf(m,
 455                 "Total vfs operations: %d maximum at one time: %d\n",
 456                 GlobalCurrentXid, GlobalMaxActiveXid);
 457
 458         i = 0;
 459         spin_lock(&cifs_tcp_ses_lock);
 460         list_for_each(tmp1, &cifs_tcp_ses_list) {
 461                 server = list_entry(tmp1, struct TCP_Server_Info,
 462                                     tcp_ses_list);
 463 #ifdef CONFIG_CIFS_STATS2
 464                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 465                         if (atomic_read(&server->smb2slowcmd[j]))
 466                                 seq_printf(m, "%d slow responses from %s for command %d\n",
 467                                         atomic_read(&server->smb2slowcmd[j]),
 468                                         server->hostname, j);
 469 #endif /* STATS2 */
 470                 list_for_each(tmp2, &server->smb_ses_list) {
 471                         ses = list_entry(tmp2, struct cifs_ses,
 472                                          smb_ses_list);
 473                         list_for_each(tmp3, &ses->tcon_list) {
 474                                 tcon = list_entry(tmp3,
 475                                                   struct cifs_tcon,
 476                                                   tcon_list);
 477                                 i++;
 478                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 479                                 if (tcon->need_reconnect)
 480                                         seq_puts(m, "\tDISCONNECTED ");
 481                                 seq_printf(m, "\nSMBs: %d",
 482                                            atomic_read(&tcon->num_smbs_sent));
 483                                 if (server->ops->print_stats)
 484                                         server->ops->print_stats(m, tcon);
 485                         }
 486                 }
 487         }
 488         spin_unlock(&cifs_tcp_ses_lock);
 489
 490         seq_putc(m, '\n');
 491         return 0;
 492 }
 493
 494 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 495 {
 496         return single_open(file, cifs_stats_proc_show, NULL);
 497 }
 498
 499 static const struct file_operations cifs_stats_proc_fops = {
 500         .open           = cifs_stats_proc_open,
 501         .read           = seq_read,
 502         .llseek         = seq_lseek,
 503         .release        = single_release,
 504         .write          = cifs_stats_proc_write,
 505 };
 506
 507 #ifdef CONFIG_CIFS_SMB_DIRECT
 508 #define PROC_FILE_DEFINE(name) \
 509 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 510         size_t count, loff_t *ppos) \
 511 { \
 512         int rc; \
 513         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 514         if (rc) \
 515                 return rc; \
 516         return count; \
 517 } \
 518 static int name##_proc_show(struct seq_file *m, void *v) \
 519 { \
 520         seq_printf(m, "%d\n", name ); \
 521         return 0; \
 522 } \
 523 static int name##_open(struct inode *inode, struct file *file) \
 524 { \
 525         return single_open(file, name##_proc_show, NULL); \
 526 } \
 527 \
 528 static const struct file_operations cifs_##name##_proc_fops = { \
 529         .open           = name##_open, \
 530         .read           = seq_read, \
 531         .llseek         = seq_lseek, \
 532         .release        = single_release, \
 533         .write          = name##_write, \
 534 }
 535
 536 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 537 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 538 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 539 PROC_FILE_DEFINE(smbd_max_receive_size);
 540 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 541 PROC_FILE_DEFINE(smbd_max_send_size);
 542 PROC_FILE_DEFINE(smbd_send_credit_target);
 543 PROC_FILE_DEFINE(smbd_receive_credit_max);
 544 #endif
 545
 546 static struct proc_dir_entry *proc_fs_cifs;
 547 static const struct file_operations cifsFYI_proc_fops;
 548 static const struct file_operations cifs_lookup_cache_proc_fops;
 549 static const struct file_operations traceSMB_proc_fops;
 550 static const struct file_operations cifs_security_flags_proc_fops;
 551 static const struct file_operations cifs_linux_ext_proc_fops;
 552
 553 void
 554 cifs_proc_init(void)
 555 {
 556         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 557         if (proc_fs_cifs == NULL)
 558                 return;
 559
 560         proc_create_single("DebugData", 0, proc_fs_cifs,
 561                         cifs_debug_data_proc_show);
 562
 563         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 564         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 565         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 566         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 567                     &cifs_linux_ext_proc_fops);
 568         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 569                     &cifs_security_flags_proc_fops);
 570         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 571                     &cifs_lookup_cache_proc_fops);
 572 #ifdef CONFIG_CIFS_SMB_DIRECT
 573         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 574                 &cifs_rdma_readwrite_threshold_proc_fops);
 575         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 576                 &cifs_smbd_max_frmr_depth_proc_fops);
 577         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 578                 &cifs_smbd_keep_alive_interval_proc_fops);
 579         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 580                 &cifs_smbd_max_receive_size_proc_fops);
 581         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 582                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 583         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 584                 &cifs_smbd_max_send_size_proc_fops);
 585         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 586                 &cifs_smbd_send_credit_target_proc_fops);
 587         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 588                 &cifs_smbd_receive_credit_max_proc_fops);
 589 #endif
 590 }
 591
 592 void
 593 cifs_proc_clean(void)
 594 {
 595         if (proc_fs_cifs == NULL)
 596                 return;
 597
 598         remove_proc_entry("DebugData", proc_fs_cifs);
 599         remove_proc_entry("cifsFYI", proc_fs_cifs);
 600         remove_proc_entry("traceSMB", proc_fs_cifs);
 601         remove_proc_entry("Stats", proc_fs_cifs);
 602         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 603         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 604         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 605 #ifdef CONFIG_CIFS_SMB_DIRECT
 606         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 607         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 608         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 609         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 610         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 611         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 612         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 613         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 614 #endif
 615         remove_proc_entry("fs/cifs", NULL);
 616 }
 617
 618 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 619 {
 620         seq_printf(m, "%d\n", cifsFYI);
 621         return 0;
 622 }
 623
 624 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 625 {
 626         return single_open(file, cifsFYI_proc_show, NULL);
 627 }
 628
 629 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 630                 size_t count, loff_t *ppos)
 631 {
 632         char c[2] = { '\0' };
 633         bool bv;
 634         int rc;
 635
 636         rc = get_user(c[0], buffer);
 637         if (rc)
 638                 return rc;
 639         if (strtobool(c, &bv) == 0)
 640                 cifsFYI = bv;
 641         else if ((c[0] > '1') && (c[0] <= '9'))
 642                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 643         else
 644                 return -EINVAL;
 645
 646         return count;
 647 }
 648
 649 static const struct file_operations cifsFYI_proc_fops = {
 650         .open           = cifsFYI_proc_open,
 651         .read           = seq_read,
 652         .llseek         = seq_lseek,
 653         .release        = single_release,
 654         .write          = cifsFYI_proc_write,
 655 };
 656
 657 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 658 {
 659         seq_printf(m, "%d\n", linuxExtEnabled);
 660         return 0;
 661 }
 662
 663 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 664 {
 665         return single_open(file, cifs_linux_ext_proc_show, NULL);
 666 }
 667
 668 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 669                 const char __user *buffer, size_t count, loff_t *ppos)
 670 {
 671         int rc;
 672
 673         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 674         if (rc)
 675                 return rc;
 676
 677         return count;
 678 }
 679
 680 static const struct file_operations cifs_linux_ext_proc_fops = {
 681         .open           = cifs_linux_ext_proc_open,
 682         .read           = seq_read,
 683         .llseek         = seq_lseek,
 684         .release        = single_release,
 685         .write          = cifs_linux_ext_proc_write,
 686 };
 687
 688 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 689 {
 690         seq_printf(m, "%d\n", lookupCacheEnabled);
 691         return 0;
 692 }
 693
 694 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 695 {
 696         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 697 }
 698
 699 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 700                 const char __user *buffer, size_t count, loff_t *ppos)
 701 {
 702         int rc;
 703
 704         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 705         if (rc)
 706                 return rc;
 707
 708         return count;
 709 }
 710
 711 static const struct file_operations cifs_lookup_cache_proc_fops = {
 712         .open           = cifs_lookup_cache_proc_open,
 713         .read           = seq_read,
 714         .llseek         = seq_lseek,
 715         .release        = single_release,
 716         .write          = cifs_lookup_cache_proc_write,
 717 };
 718
 719 static int traceSMB_proc_show(struct seq_file *m, void *v)
 720 {
 721         seq_printf(m, "%d\n", traceSMB);
 722         return 0;
 723 }
 724
 725 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 726 {
 727         return single_open(file, traceSMB_proc_show, NULL);
 728 }
 729
 730 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 731                 size_t count, loff_t *ppos)
 732 {
 733         int rc;
 734
 735         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 736         if (rc)
 737                 return rc;
 738
 739         return count;
 740 }
 741
 742 static const struct file_operations traceSMB_proc_fops = {
 743         .open           = traceSMB_proc_open,
 744         .read           = seq_read,
 745         .llseek         = seq_lseek,
 746         .release        = single_release,
 747         .write          = traceSMB_proc_write,
 748 };
 749
 750 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 751 {
 752         seq_printf(m, "0x%x\n", global_secflags);
 753         return 0;
 754 }
 755
 756 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 757 {
 758         return single_open(file, cifs_security_flags_proc_show, NULL);
 759 }
 760
 761 /*
 762  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 763  * flags except for the ones corresponding to the given MUST flag. If there are
 764  * multiple MUST flags, then try to prefer more secure ones.
 765  */
 766 static void
 767 cifs_security_flags_handle_must_flags(unsigned int *flags)
 768 {
 769         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 770
 771         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 772                 *flags = CIFSSEC_MUST_KRB5;
 773         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 774                 *flags = CIFSSEC_MUST_NTLMSSP;
 775         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 776                 *flags = CIFSSEC_MUST_NTLMV2;
 777         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 778                 *flags = CIFSSEC_MUST_NTLM;
 779         else if (CIFSSEC_MUST_LANMAN &&
 780                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 781                 *flags = CIFSSEC_MUST_LANMAN;
 782         else if (CIFSSEC_MUST_PLNTXT &&
 783                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 784                 *flags = CIFSSEC_MUST_PLNTXT;
 785
 786         *flags |= signflags;
 787 }
 788
 789 static ssize_t cifs_security_flags_proc_write(struct file *file,
 790                 const char __user *buffer, size_t count, loff_t *ppos)
 791 {
 792         int rc;
 793         unsigned int flags;
 794         char flags_string[12];
 795         bool bv;
 796
 797         if ((count < 1) || (count > 11))
 798                 return -EINVAL;
 799
 800         memset(flags_string, 0, 12);
 801
 802         if (copy_from_user(flags_string, buffer, count))
 803                 return -EFAULT;
 804
 805         if (count < 3) {
 806                 /* single char or single char followed by null */
 807                 if (strtobool(flags_string, &bv) == 0) {
 808                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 809                         return count;
 810                 } else if (!isdigit(flags_string[0])) {
 811                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 812                                         flags_string);
 813                         return -EINVAL;
 814                 }
 815         }
 816
 817         /* else we have a number */
 818         rc = kstrtouint(flags_string, 0, &flags);
 819         if (rc) {
 820                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 821                                 flags_string);
 822                 return rc;
 823         }
 824
 825         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 826
 827         if (flags == 0)  {
 828                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 829                 return -EINVAL;
 830         }
 831
 832         if (flags & ~CIFSSEC_MASK) {
 833                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 834                          flags & ~CIFSSEC_MASK);
 835                 return -EINVAL;
 836         }
 837
 838         cifs_security_flags_handle_must_flags(&flags);
 839
 840         /* flags look ok - update the global security flags for cifs module */
 841         global_secflags = flags;
 842         if (global_secflags & CIFSSEC_MUST_SIGN) {
 843                 /* requiring signing implies signing is allowed */
 844                 global_secflags |= CIFSSEC_MAY_SIGN;
 845                 cifs_dbg(FYI, "packet signing now required\n");
 846         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 847                 cifs_dbg(FYI, "packet signing disabled\n");
 848         }
 849         /* BB should we turn on MAY flags for other MUST options? */
 850         return count;
 851 }
 852
 853 static const struct file_operations cifs_security_flags_proc_fops = {
 854         .open           = cifs_security_flags_proc_open,
 855         .read           = seq_read,
 856         .llseek         = seq_lseek,
 857         .release        = single_release,
 858         .write          = cifs_security_flags_proc_write,
 859 };
 860 #else
 861 inline void cifs_proc_init(void)
 862 {
 863 }
 864
 865 inline void cifs_proc_clean(void)
 866 {
 867 }
 868 #endif /* PROC_FS */