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 #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                 if (!server->smbd_conn) {
 214                         seq_printf(m, "\nSMBDirect transport not available");
 215                         goto skip_rdma;
 216                 }
 217
 218                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 219                         "transport status: %x",
 220                         server->smbd_conn->protocol,
 221                         server->smbd_conn->transport_status);
 222                 seq_printf(m, "\nConn receive_credit_max: %x "
 223                         "send_credit_target: %x max_send_size: %x",
 224                         server->smbd_conn->receive_credit_max,
 225                         server->smbd_conn->send_credit_target,
 226                         server->smbd_conn->max_send_size);
 227                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 228                         "max_fragmented_send_size: %x max_receive_size:%x",
 229                         server->smbd_conn->max_fragmented_recv_size,
 230                         server->smbd_conn->max_fragmented_send_size,
 231                         server->smbd_conn->max_receive_size);
 232                 seq_printf(m, "\nConn keep_alive_interval: %x "
 233                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 234                         server->smbd_conn->keep_alive_interval,
 235                         server->smbd_conn->max_readwrite_size,
 236                         server->smbd_conn->rdma_readwrite_threshold);
 237                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 238                         "count_put_receive_buffer: %x count_send_empty: %x",
 239                         server->smbd_conn->count_get_receive_buffer,
 240                         server->smbd_conn->count_put_receive_buffer,
 241                         server->smbd_conn->count_send_empty);
 242                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 243                         "count_enqueue_reassembly_queue: %x "
 244                         "count_dequeue_reassembly_queue: %x "
 245                         "fragment_reassembly_remaining: %x "
 246                         "reassembly_data_length: %x "
 247                         "reassembly_queue_length: %x",
 248                         server->smbd_conn->count_reassembly_queue,
 249                         server->smbd_conn->count_enqueue_reassembly_queue,
 250                         server->smbd_conn->count_dequeue_reassembly_queue,
 251                         server->smbd_conn->fragment_reassembly_remaining,
 252                         server->smbd_conn->reassembly_data_length,
 253                         server->smbd_conn->reassembly_queue_length);
 254                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 255                         "receive_credits: %x receive_credit_target: %x",
 256                         atomic_read(&server->smbd_conn->send_credits),
 257                         atomic_read(&server->smbd_conn->receive_credits),
 258                         server->smbd_conn->receive_credit_target);
 259                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 260                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 261                         atomic_read(&server->smbd_conn->send_pending),
 262                         atomic_read(&server->smbd_conn->send_payload_pending),
 263                         server->smbd_conn->smbd_send_pending,
 264                         server->smbd_conn->smbd_recv_pending);
 265                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 266                         "count_empty_packet_queue: %x",
 267                         server->smbd_conn->count_receive_queue,
 268                         server->smbd_conn->count_empty_packet_queue);
 269                 seq_printf(m, "\nMR responder_resources: %x "
 270                         "max_frmr_depth: %x mr_type: %x",
 271                         server->smbd_conn->responder_resources,
 272                         server->smbd_conn->max_frmr_depth,
 273                         server->smbd_conn->mr_type);
 274                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 275                         atomic_read(&server->smbd_conn->mr_ready_count),
 276                         atomic_read(&server->smbd_conn->mr_used_count));
 277 skip_rdma:
 278 #endif
 279                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 280                         server->credits,  server->dialect);
 281                 if (server->sign)
 282                         seq_printf(m, " signed");
 283                 if (server->posix_ext_supported)
 284                         seq_printf(m, " posix");
 285
 286                 i++;
 287                 list_for_each(tmp2, &server->smb_ses_list) {
 288                         ses = list_entry(tmp2, struct cifs_ses,
 289                                          smb_ses_list);
 290                         if ((ses->serverDomain == NULL) ||
 291                                 (ses->serverOS == NULL) ||
 292                                 (ses->serverNOS == NULL)) {
 293                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
 294                                         i, ses->serverName, ses->ses_count,
 295                                         ses->capabilities, ses->status);
 296                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 297                                         seq_printf(m, "Guest\t");
 298                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 299                                         seq_printf(m, "Anonymous\t");
 300                         } else {
 301                                 seq_printf(m,
 302                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 303                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 304                                     " session status: %d\t",
 305                                 i, ses->serverName, ses->serverDomain,
 306                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 307                                 ses->capabilities, ses->status);
 308                         }
 309                         if (server->rdma)
 310                                 seq_printf(m, "RDMA\n\t");
 311                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 312                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 313                                    server->tcpStatus, server->srv_count,
 314                                    server->sec_mode, in_flight(server));
 315
 316 #ifdef CONFIG_CIFS_STATS2
 317                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 318                                 atomic_read(&server->in_send),
 319                                 atomic_read(&server->num_waiters));
 320 #endif
 321
 322                         seq_puts(m, "\n\tShares:");
 323                         j = 0;
 324
 325                         seq_printf(m, "\n\t%d) IPC: ", j);
 326                         if (ses->tcon_ipc)
 327                                 cifs_debug_tcon(m, ses->tcon_ipc);
 328                         else
 329                                 seq_puts(m, "none\n");
 330
 331                         list_for_each(tmp3, &ses->tcon_list) {
 332                                 tcon = list_entry(tmp3, struct cifs_tcon,
 333                                                   tcon_list);
 334                                 ++j;
 335                                 seq_printf(m, "\n\t%d) ", j);
 336                                 cifs_debug_tcon(m, tcon);
 337                         }
 338
 339                         seq_puts(m, "\n\tMIDs:\n");
 340
 341                         spin_lock(&GlobalMid_Lock);
 342                         list_for_each(tmp3, &server->pending_mid_q) {
 343                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 344                                         qhead);
 345                                 seq_printf(m, "\tState: %d com: %d pid:"
 346                                               " %d cbdata: %p mid %llu\n",
 347                                               mid_entry->mid_state,
 348                                               le16_to_cpu(mid_entry->command),
 349                                               mid_entry->pid,
 350                                               mid_entry->callback_data,
 351                                               mid_entry->mid);
 352                         }
 353                         spin_unlock(&GlobalMid_Lock);
 354
 355                         spin_lock(&ses->iface_lock);
 356                         if (ses->iface_count)
 357                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 358                                            ses->iface_count);
 359                         for (j = 0; j < ses->iface_count; j++) {
 360                                 seq_printf(m, "\t%d)\n", j);
 361                                 cifs_dump_iface(m, &ses->iface_list[j]);
 362                         }
 363                         spin_unlock(&ses->iface_lock);
 364                 }
 365         }
 366         spin_unlock(&cifs_tcp_ses_lock);
 367         seq_putc(m, '\n');
 368
 369         /* BB add code to dump additional info such as TCP session info now */
 370         return 0;
 371 }
 372
 373 static ssize_t cifs_stats_proc_write(struct file *file,
 374                 const char __user *buffer, size_t count, loff_t *ppos)
 375 {
 376         bool bv;
 377         int rc;
 378         struct list_head *tmp1, *tmp2, *tmp3;
 379         struct TCP_Server_Info *server;
 380         struct cifs_ses *ses;
 381         struct cifs_tcon *tcon;
 382
 383         rc = kstrtobool_from_user(buffer, count, &bv);
 384         if (rc == 0) {
 385 #ifdef CONFIG_CIFS_STATS2
 386                 int i;
 387
 388                 atomic_set(&totBufAllocCount, 0);
 389                 atomic_set(&totSmBufAllocCount, 0);
 390 #endif /* CONFIG_CIFS_STATS2 */
 391                 atomic_set(&tcpSesReconnectCount, 0);
 392                 atomic_set(&tconInfoReconnectCount, 0);
 393
 394                 spin_lock(&GlobalMid_Lock);
 395                 GlobalMaxActiveXid = 0;
 396                 GlobalCurrentXid = 0;
 397                 spin_unlock(&GlobalMid_Lock);
 398                 spin_lock(&cifs_tcp_ses_lock);
 399                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 400                         server = list_entry(tmp1, struct TCP_Server_Info,
 401                                             tcp_ses_list);
 402 #ifdef CONFIG_CIFS_STATS2
 403                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
 404                                 atomic_set(&server->smb2slowcmd[i], 0);
 405 #endif /* CONFIG_CIFS_STATS2 */
 406                         list_for_each(tmp2, &server->smb_ses_list) {
 407                                 ses = list_entry(tmp2, struct cifs_ses,
 408                                                  smb_ses_list);
 409                                 list_for_each(tmp3, &ses->tcon_list) {
 410                                         tcon = list_entry(tmp3,
 411                                                           struct cifs_tcon,
 412                                                           tcon_list);
 413                                         atomic_set(&tcon->num_smbs_sent, 0);
 414                                         spin_lock(&tcon->stat_lock);
 415                                         tcon->bytes_read = 0;
 416                                         tcon->bytes_written = 0;
 417                                         spin_unlock(&tcon->stat_lock);
 418                                         if (server->ops->clear_stats)
 419                                                 server->ops->clear_stats(tcon);
 420                                 }
 421                         }
 422                 }
 423                 spin_unlock(&cifs_tcp_ses_lock);
 424         } else {
 425                 return rc;
 426         }
 427
 428         return count;
 429 }
 430
 431 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 432 {
 433         int i;
 434 #ifdef CONFIG_CIFS_STATS2
 435         int j;
 436 #endif /* STATS2 */
 437         struct list_head *tmp1, *tmp2, *tmp3;
 438         struct TCP_Server_Info *server;
 439         struct cifs_ses *ses;
 440         struct cifs_tcon *tcon;
 441
 442         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 443                         sesInfoAllocCount.counter);
 444         seq_printf(m, "Share (unique mount targets): %d\n",
 445                         tconInfoAllocCount.counter);
 446         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 447                         bufAllocCount.counter,
 448                         cifs_min_rcv + tcpSesAllocCount.counter);
 449         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 450                         smBufAllocCount.counter, cifs_min_small);
 451 #ifdef CONFIG_CIFS_STATS2
 452         seq_printf(m, "Total Large %d Small %d Allocations\n",
 453                                 atomic_read(&totBufAllocCount),
 454                                 atomic_read(&totSmBufAllocCount));
 455 #endif /* CONFIG_CIFS_STATS2 */
 456
 457         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 458         seq_printf(m,
 459                 "\n%d session %d share reconnects\n",
 460                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 461
 462         seq_printf(m,
 463                 "Total vfs operations: %d maximum at one time: %d\n",
 464                 GlobalCurrentXid, GlobalMaxActiveXid);
 465
 466         i = 0;
 467         spin_lock(&cifs_tcp_ses_lock);
 468         list_for_each(tmp1, &cifs_tcp_ses_list) {
 469                 server = list_entry(tmp1, struct TCP_Server_Info,
 470                                     tcp_ses_list);
 471 #ifdef CONFIG_CIFS_STATS2
 472                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 473                         if (atomic_read(&server->smb2slowcmd[j]))
 474                                 seq_printf(m, "%d slow responses from %s for command %d\n",
 475                                         atomic_read(&server->smb2slowcmd[j]),
 476                                         server->hostname, j);
 477 #endif /* STATS2 */
 478                 list_for_each(tmp2, &server->smb_ses_list) {
 479                         ses = list_entry(tmp2, struct cifs_ses,
 480                                          smb_ses_list);
 481                         list_for_each(tmp3, &ses->tcon_list) {
 482                                 tcon = list_entry(tmp3,
 483                                                   struct cifs_tcon,
 484                                                   tcon_list);
 485                                 i++;
 486                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 487                                 if (tcon->need_reconnect)
 488                                         seq_puts(m, "\tDISCONNECTED ");
 489                                 seq_printf(m, "\nSMBs: %d",
 490                                            atomic_read(&tcon->num_smbs_sent));
 491                                 if (server->ops->print_stats)
 492                                         server->ops->print_stats(m, tcon);
 493                         }
 494                 }
 495         }
 496         spin_unlock(&cifs_tcp_ses_lock);
 497
 498         seq_putc(m, '\n');
 499         return 0;
 500 }
 501
 502 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 503 {
 504         return single_open(file, cifs_stats_proc_show, NULL);
 505 }
 506
 507 static const struct file_operations cifs_stats_proc_fops = {
 508         .open           = cifs_stats_proc_open,
 509         .read           = seq_read,
 510         .llseek         = seq_lseek,
 511         .release        = single_release,
 512         .write          = cifs_stats_proc_write,
 513 };
 514
 515 #ifdef CONFIG_CIFS_SMB_DIRECT
 516 #define PROC_FILE_DEFINE(name) \
 517 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 518         size_t count, loff_t *ppos) \
 519 { \
 520         int rc; \
 521         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 522         if (rc) \
 523                 return rc; \
 524         return count; \
 525 } \
 526 static int name##_proc_show(struct seq_file *m, void *v) \
 527 { \
 528         seq_printf(m, "%d\n", name ); \
 529         return 0; \
 530 } \
 531 static int name##_open(struct inode *inode, struct file *file) \
 532 { \
 533         return single_open(file, name##_proc_show, NULL); \
 534 } \
 535 \
 536 static const struct file_operations cifs_##name##_proc_fops = { \
 537         .open           = name##_open, \
 538         .read           = seq_read, \
 539         .llseek         = seq_lseek, \
 540         .release        = single_release, \
 541         .write          = name##_write, \
 542 }
 543
 544 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 545 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 546 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 547 PROC_FILE_DEFINE(smbd_max_receive_size);
 548 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 549 PROC_FILE_DEFINE(smbd_max_send_size);
 550 PROC_FILE_DEFINE(smbd_send_credit_target);
 551 PROC_FILE_DEFINE(smbd_receive_credit_max);
 552 #endif
 553
 554 static struct proc_dir_entry *proc_fs_cifs;
 555 static const struct file_operations cifsFYI_proc_fops;
 556 static const struct file_operations cifs_lookup_cache_proc_fops;
 557 static const struct file_operations traceSMB_proc_fops;
 558 static const struct file_operations cifs_security_flags_proc_fops;
 559 static const struct file_operations cifs_linux_ext_proc_fops;
 560
 561 void
 562 cifs_proc_init(void)
 563 {
 564         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 565         if (proc_fs_cifs == NULL)
 566                 return;
 567
 568         proc_create_single("DebugData", 0, proc_fs_cifs,
 569                         cifs_debug_data_proc_show);
 570
 571         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 572         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 573         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 574         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 575                     &cifs_linux_ext_proc_fops);
 576         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 577                     &cifs_security_flags_proc_fops);
 578         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 579                     &cifs_lookup_cache_proc_fops);
 580 #ifdef CONFIG_CIFS_SMB_DIRECT
 581         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 582                 &cifs_rdma_readwrite_threshold_proc_fops);
 583         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 584                 &cifs_smbd_max_frmr_depth_proc_fops);
 585         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 586                 &cifs_smbd_keep_alive_interval_proc_fops);
 587         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 588                 &cifs_smbd_max_receive_size_proc_fops);
 589         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 590                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 591         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 592                 &cifs_smbd_max_send_size_proc_fops);
 593         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 594                 &cifs_smbd_send_credit_target_proc_fops);
 595         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 596                 &cifs_smbd_receive_credit_max_proc_fops);
 597 #endif
 598 }
 599
 600 void
 601 cifs_proc_clean(void)
 602 {
 603         if (proc_fs_cifs == NULL)
 604                 return;
 605
 606         remove_proc_entry("DebugData", proc_fs_cifs);
 607         remove_proc_entry("cifsFYI", proc_fs_cifs);
 608         remove_proc_entry("traceSMB", proc_fs_cifs);
 609         remove_proc_entry("Stats", proc_fs_cifs);
 610         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 611         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 612         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 613 #ifdef CONFIG_CIFS_SMB_DIRECT
 614         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 615         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 616         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 617         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 618         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 619         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 620         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 621         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 622 #endif
 623         remove_proc_entry("fs/cifs", NULL);
 624 }
 625
 626 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 627 {
 628         seq_printf(m, "%d\n", cifsFYI);
 629         return 0;
 630 }
 631
 632 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 633 {
 634         return single_open(file, cifsFYI_proc_show, NULL);
 635 }
 636
 637 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 638                 size_t count, loff_t *ppos)
 639 {
 640         char c[2] = { '\0' };
 641         bool bv;
 642         int rc;
 643
 644         rc = get_user(c[0], buffer);
 645         if (rc)
 646                 return rc;
 647         if (strtobool(c, &bv) == 0)
 648                 cifsFYI = bv;
 649         else if ((c[0] > '1') && (c[0] <= '9'))
 650                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 651         else
 652                 return -EINVAL;
 653
 654         return count;
 655 }
 656
 657 static const struct file_operations cifsFYI_proc_fops = {
 658         .open           = cifsFYI_proc_open,
 659         .read           = seq_read,
 660         .llseek         = seq_lseek,
 661         .release        = single_release,
 662         .write          = cifsFYI_proc_write,
 663 };
 664
 665 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 666 {
 667         seq_printf(m, "%d\n", linuxExtEnabled);
 668         return 0;
 669 }
 670
 671 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 672 {
 673         return single_open(file, cifs_linux_ext_proc_show, NULL);
 674 }
 675
 676 static ssize_t cifs_linux_ext_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, &linuxExtEnabled);
 682         if (rc)
 683                 return rc;
 684
 685         return count;
 686 }
 687
 688 static const struct file_operations cifs_linux_ext_proc_fops = {
 689         .open           = cifs_linux_ext_proc_open,
 690         .read           = seq_read,
 691         .llseek         = seq_lseek,
 692         .release        = single_release,
 693         .write          = cifs_linux_ext_proc_write,
 694 };
 695
 696 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 697 {
 698         seq_printf(m, "%d\n", lookupCacheEnabled);
 699         return 0;
 700 }
 701
 702 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 703 {
 704         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 705 }
 706
 707 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 708                 const char __user *buffer, size_t count, loff_t *ppos)
 709 {
 710         int rc;
 711
 712         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 713         if (rc)
 714                 return rc;
 715
 716         return count;
 717 }
 718
 719 static const struct file_operations cifs_lookup_cache_proc_fops = {
 720         .open           = cifs_lookup_cache_proc_open,
 721         .read           = seq_read,
 722         .llseek         = seq_lseek,
 723         .release        = single_release,
 724         .write          = cifs_lookup_cache_proc_write,
 725 };
 726
 727 static int traceSMB_proc_show(struct seq_file *m, void *v)
 728 {
 729         seq_printf(m, "%d\n", traceSMB);
 730         return 0;
 731 }
 732
 733 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 734 {
 735         return single_open(file, traceSMB_proc_show, NULL);
 736 }
 737
 738 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 739                 size_t count, loff_t *ppos)
 740 {
 741         int rc;
 742
 743         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 744         if (rc)
 745                 return rc;
 746
 747         return count;
 748 }
 749
 750 static const struct file_operations traceSMB_proc_fops = {
 751         .open           = traceSMB_proc_open,
 752         .read           = seq_read,
 753         .llseek         = seq_lseek,
 754         .release        = single_release,
 755         .write          = traceSMB_proc_write,
 756 };
 757
 758 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 759 {
 760         seq_printf(m, "0x%x\n", global_secflags);
 761         return 0;
 762 }
 763
 764 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 765 {
 766         return single_open(file, cifs_security_flags_proc_show, NULL);
 767 }
 768
 769 /*
 770  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 771  * flags except for the ones corresponding to the given MUST flag. If there are
 772  * multiple MUST flags, then try to prefer more secure ones.
 773  */
 774 static void
 775 cifs_security_flags_handle_must_flags(unsigned int *flags)
 776 {
 777         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 778
 779         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 780                 *flags = CIFSSEC_MUST_KRB5;
 781         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 782                 *flags = CIFSSEC_MUST_NTLMSSP;
 783         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 784                 *flags = CIFSSEC_MUST_NTLMV2;
 785         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 786                 *flags = CIFSSEC_MUST_NTLM;
 787         else if (CIFSSEC_MUST_LANMAN &&
 788                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 789                 *flags = CIFSSEC_MUST_LANMAN;
 790         else if (CIFSSEC_MUST_PLNTXT &&
 791                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 792                 *flags = CIFSSEC_MUST_PLNTXT;
 793
 794         *flags |= signflags;
 795 }
 796
 797 static ssize_t cifs_security_flags_proc_write(struct file *file,
 798                 const char __user *buffer, size_t count, loff_t *ppos)
 799 {
 800         int rc;
 801         unsigned int flags;
 802         char flags_string[12];
 803         bool bv;
 804
 805         if ((count < 1) || (count > 11))
 806                 return -EINVAL;
 807
 808         memset(flags_string, 0, 12);
 809
 810         if (copy_from_user(flags_string, buffer, count))
 811                 return -EFAULT;
 812
 813         if (count < 3) {
 814                 /* single char or single char followed by null */
 815                 if (strtobool(flags_string, &bv) == 0) {
 816                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 817                         return count;
 818                 } else if (!isdigit(flags_string[0])) {
 819                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 820                                         flags_string);
 821                         return -EINVAL;
 822                 }
 823         }
 824
 825         /* else we have a number */
 826         rc = kstrtouint(flags_string, 0, &flags);
 827         if (rc) {
 828                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 829                                 flags_string);
 830                 return rc;
 831         }
 832
 833         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 834
 835         if (flags == 0)  {
 836                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 837                 return -EINVAL;
 838         }
 839
 840         if (flags & ~CIFSSEC_MASK) {
 841                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 842                          flags & ~CIFSSEC_MASK);
 843                 return -EINVAL;
 844         }
 845
 846         cifs_security_flags_handle_must_flags(&flags);
 847
 848         /* flags look ok - update the global security flags for cifs module */
 849         global_secflags = flags;
 850         if (global_secflags & CIFSSEC_MUST_SIGN) {
 851                 /* requiring signing implies signing is allowed */
 852                 global_secflags |= CIFSSEC_MAY_SIGN;
 853                 cifs_dbg(FYI, "packet signing now required\n");
 854         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 855                 cifs_dbg(FYI, "packet signing disabled\n");
 856         }
 857         /* BB should we turn on MAY flags for other MUST options? */
 858         return count;
 859 }
 860
 861 static const struct file_operations cifs_security_flags_proc_fops = {
 862         .open           = cifs_security_flags_proc_open,
 863         .read           = seq_read,
 864         .llseek         = seq_lseek,
 865         .release        = single_release,
 866         .write          = cifs_security_flags_proc_write,
 867 };
 868 #else
 869 inline void cifs_proc_init(void)
 870 {
 871 }
 872
 873 inline void cifs_proc_clean(void)
 874 {
 875 }
 876 #endif /* PROC_FS */