fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   fs/cifs_debug.c
   4  *
   5  *   Copyright (C) International Business Machines  Corp., 2000,2005
   6  *
   7  *   Modified by Steve French (sfrench@us.ibm.com)
   8  */
   9 #include <linux/fs.h>
  10 #include <linux/string.h>
  11 #include <linux/ctype.h>
  12 #include <linux/module.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/uaccess.h>
  15 #include "cifspdu.h"
  16 #include "cifsglob.h"
  17 #include "cifsproto.h"
  18 #include "cifs_debug.h"
  19 #include "cifsfs.h"
  20 #ifdef CONFIG_CIFS_DFS_UPCALL
  21 #include "dfs_cache.h"
  22 #endif
  23 #ifdef CONFIG_CIFS_SMB_DIRECT
  24 #include "smbdirect.h"
  25 #endif
  26
  27 void
  28 cifs_dump_mem(char *label, void *data, int length)
  29 {
  30         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  31         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  32                        data, length, true);
  33 }
  34
  35 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  36 {
  37 #ifdef CONFIG_CIFS_DEBUG2
  38         struct smb_hdr *smb = (struct smb_hdr *)buf;
  39
  40         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  41                  smb->Command, smb->Status.CifsError,
  42                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  43         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  44                  server->ops->calc_smb_size(smb, server));
  45 #endif /* CONFIG_CIFS_DEBUG2 */
  46 }
  47
  48 void cifs_dump_mids(struct TCP_Server_Info *server)
  49 {
  50 #ifdef CONFIG_CIFS_DEBUG2
  51         struct list_head *tmp;
  52         struct mid_q_entry *mid_entry;
  53
  54         if (server == NULL)
  55                 return;
  56
  57         cifs_dbg(VFS, "Dump pending requests:\n");
  58         spin_lock(&GlobalMid_Lock);
  59         list_for_each(tmp, &server->pending_mid_q) {
  60                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  61                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  62                          mid_entry->mid_state,
  63                          le16_to_cpu(mid_entry->command),
  64                          mid_entry->pid,
  65                          mid_entry->callback_data,
  66                          mid_entry->mid);
  67 #ifdef CONFIG_CIFS_STATS2
  68                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  69                          mid_entry->large_buf,
  70                          mid_entry->resp_buf,
  71                          mid_entry->when_received,
  72                          jiffies);
  73 #endif /* STATS2 */
  74                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  75                          mid_entry->multiRsp, mid_entry->multiEnd);
  76                 if (mid_entry->resp_buf) {
  77                         cifs_dump_detail(mid_entry->resp_buf, server);
  78                         cifs_dump_mem("existing buf: ",
  79                                 mid_entry->resp_buf, 62);
  80                 }
  81         }
  82         spin_unlock(&GlobalMid_Lock);
  83 #endif /* CONFIG_CIFS_DEBUG2 */
  84 }
  85
  86 #ifdef CONFIG_PROC_FS
  87 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  88 {
  89         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  90
  91         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
  92         if (tcon->nativeFileSystem)
  93                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  94         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  95                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  96                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  97                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  98                    tcon->tidStatus);
  99         if (dev_type == FILE_DEVICE_DISK)
 100                 seq_puts(m, " type: DISK ");
 101         else if (dev_type == FILE_DEVICE_CD_ROM)
 102                 seq_puts(m, " type: CDROM ");
 103         else
 104                 seq_printf(m, " type: %d ", dev_type);
 105
 106         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 107
 108         if ((tcon->seal) ||
 109             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 110             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 111                 seq_printf(m, " Encrypted");
 112         if (tcon->nocase)
 113                 seq_printf(m, " nocase");
 114         if (tcon->unix_ext)
 115                 seq_printf(m, " POSIX Extensions");
 116         if (tcon->ses->server->ops->dump_share_caps)
 117                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 118
 119         if (tcon->need_reconnect)
 120                 seq_puts(m, "\tDISCONNECTED ");
 121         seq_putc(m, '\n');
 122 }
 123
 124 static void
 125 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 126 {
 127         struct TCP_Server_Info *server = chan->server;
 128
 129         seq_printf(m, "\t\tChannel %d Number of credits: %d Dialect 0x%x "
 130                    "TCP status: %d Instance: %d Local Users To Server: %d "
 131                    "SecMode: 0x%x Req On Wire: %d In Send: %d "
 132                    "In MaxReq Wait: %d\n",
 133                    i+1,
 134                    server->credits,
 135                    server->dialect,
 136                    server->tcpStatus,
 137                    server->reconnect_instance,
 138                    server->srv_count,
 139                    server->sec_mode,
 140                    in_flight(server),
 141                    atomic_read(&server->in_send),
 142                    atomic_read(&server->num_waiters));
 143 }
 144
 145 static void
 146 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 147 {
 148         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 149         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 150
 151         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 152         seq_puts(m, "\t\tCapabilities: ");
 153         if (iface->rdma_capable)
 154                 seq_puts(m, "rdma ");
 155         if (iface->rss_capable)
 156                 seq_puts(m, "rss ");
 157         seq_putc(m, '\n');
 158         if (iface->sockaddr.ss_family == AF_INET)
 159                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 160         else if (iface->sockaddr.ss_family == AF_INET6)
 161                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 162 }
 163
 164 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 165 {
 166         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 167         struct TCP_Server_Info *server;
 168         struct cifs_ses *ses;
 169         struct cifs_tcon *tcon;
 170         struct cifsFileInfo *cfile;
 171
 172         seq_puts(m, "# Version:1\n");
 173         seq_puts(m, "# Format:\n");
 174         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 175 #ifdef CONFIG_CIFS_DEBUG2
 176         seq_printf(m, " <filename> <mid>\n");
 177 #else
 178         seq_printf(m, " <filename>\n");
 179 #endif /* CIFS_DEBUG2 */
 180         spin_lock(&cifs_tcp_ses_lock);
 181         list_for_each(stmp, &cifs_tcp_ses_list) {
 182                 server = list_entry(stmp, struct TCP_Server_Info,
 183                                     tcp_ses_list);
 184                 list_for_each(tmp, &server->smb_ses_list) {
 185                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 186                         list_for_each(tmp1, &ses->tcon_list) {
 187                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 188                                 spin_lock(&tcon->open_file_lock);
 189                                 list_for_each(tmp2, &tcon->openFileList) {
 190                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 191                                                      tlist);
 192                                         seq_printf(m,
 193                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 194                                                 tcon->tid,
 195                                                 cfile->fid.persistent_fid,
 196                                                 cfile->f_flags,
 197                                                 cfile->count,
 198                                                 cfile->pid,
 199                                                 from_kuid(&init_user_ns, cfile->uid),
 200                                                 cfile->dentry->d_name.name);
 201 #ifdef CONFIG_CIFS_DEBUG2
 202                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 203 #else
 204                                         seq_printf(m, "\n");
 205 #endif /* CIFS_DEBUG2 */
 206                                 }
 207                                 spin_unlock(&tcon->open_file_lock);
 208                         }
 209                 }
 210         }
 211         spin_unlock(&cifs_tcp_ses_lock);
 212         seq_putc(m, '\n');
 213         return 0;
 214 }
 215
 216 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 217 {
 218         struct list_head *tmp1, *tmp2, *tmp3;
 219         struct mid_q_entry *mid_entry;
 220         struct TCP_Server_Info *server;
 221         struct cifs_ses *ses;
 222         struct cifs_tcon *tcon;
 223         int i, j;
 224
 225         seq_puts(m,
 226                     "Display Internal CIFS Data Structures for Debugging\n"
 227                     "---------------------------------------------------\n");
 228         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 229         seq_printf(m, "Features:");
 230 #ifdef CONFIG_CIFS_DFS_UPCALL
 231         seq_printf(m, " DFS");
 232 #endif
 233 #ifdef CONFIG_CIFS_FSCACHE
 234         seq_printf(m, ",FSCACHE");
 235 #endif
 236 #ifdef CONFIG_CIFS_SMB_DIRECT
 237         seq_printf(m, ",SMB_DIRECT");
 238 #endif
 239 #ifdef CONFIG_CIFS_STATS2
 240         seq_printf(m, ",STATS2");
 241 #else
 242         seq_printf(m, ",STATS");
 243 #endif
 244 #ifdef CONFIG_CIFS_DEBUG2
 245         seq_printf(m, ",DEBUG2");
 246 #elif defined(CONFIG_CIFS_DEBUG)
 247         seq_printf(m, ",DEBUG");
 248 #endif
 249 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 250         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 251 #endif
 252 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 253         seq_printf(m, ",WEAK_PW_HASH");
 254 #endif
 255 #ifdef CONFIG_CIFS_POSIX
 256         seq_printf(m, ",CIFS_POSIX");
 257 #endif
 258 #ifdef CONFIG_CIFS_UPCALL
 259         seq_printf(m, ",UPCALL(SPNEGO)");
 260 #endif
 261 #ifdef CONFIG_CIFS_XATTR
 262         seq_printf(m, ",XATTR");
 263 #endif
 264         seq_printf(m, ",ACL");
 265         seq_putc(m, '\n');
 266         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 267         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 268         seq_printf(m, "Servers:");
 269
 270         i = 0;
 271         spin_lock(&cifs_tcp_ses_lock);
 272         list_for_each(tmp1, &cifs_tcp_ses_list) {
 273                 server = list_entry(tmp1, struct TCP_Server_Info,
 274                                     tcp_ses_list);
 275
 276 #ifdef CONFIG_CIFS_SMB_DIRECT
 277                 if (!server->rdma)
 278                         goto skip_rdma;
 279
 280                 if (!server->smbd_conn) {
 281                         seq_printf(m, "\nSMBDirect transport not available");
 282                         goto skip_rdma;
 283                 }
 284
 285                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 286                         "transport status: %x",
 287                         server->smbd_conn->protocol,
 288                         server->smbd_conn->transport_status);
 289                 seq_printf(m, "\nConn receive_credit_max: %x "
 290                         "send_credit_target: %x max_send_size: %x",
 291                         server->smbd_conn->receive_credit_max,
 292                         server->smbd_conn->send_credit_target,
 293                         server->smbd_conn->max_send_size);
 294                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 295                         "max_fragmented_send_size: %x max_receive_size:%x",
 296                         server->smbd_conn->max_fragmented_recv_size,
 297                         server->smbd_conn->max_fragmented_send_size,
 298                         server->smbd_conn->max_receive_size);
 299                 seq_printf(m, "\nConn keep_alive_interval: %x "
 300                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 301                         server->smbd_conn->keep_alive_interval,
 302                         server->smbd_conn->max_readwrite_size,
 303                         server->smbd_conn->rdma_readwrite_threshold);
 304                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 305                         "count_put_receive_buffer: %x count_send_empty: %x",
 306                         server->smbd_conn->count_get_receive_buffer,
 307                         server->smbd_conn->count_put_receive_buffer,
 308                         server->smbd_conn->count_send_empty);
 309                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 310                         "count_enqueue_reassembly_queue: %x "
 311                         "count_dequeue_reassembly_queue: %x "
 312                         "fragment_reassembly_remaining: %x "
 313                         "reassembly_data_length: %x "
 314                         "reassembly_queue_length: %x",
 315                         server->smbd_conn->count_reassembly_queue,
 316                         server->smbd_conn->count_enqueue_reassembly_queue,
 317                         server->smbd_conn->count_dequeue_reassembly_queue,
 318                         server->smbd_conn->fragment_reassembly_remaining,
 319                         server->smbd_conn->reassembly_data_length,
 320                         server->smbd_conn->reassembly_queue_length);
 321                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 322                         "receive_credits: %x receive_credit_target: %x",
 323                         atomic_read(&server->smbd_conn->send_credits),
 324                         atomic_read(&server->smbd_conn->receive_credits),
 325                         server->smbd_conn->receive_credit_target);
 326                 seq_printf(m, "\nPending send_pending: %x ",
 327                         atomic_read(&server->smbd_conn->send_pending));
 328                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 329                         "count_empty_packet_queue: %x",
 330                         server->smbd_conn->count_receive_queue,
 331                         server->smbd_conn->count_empty_packet_queue);
 332                 seq_printf(m, "\nMR responder_resources: %x "
 333                         "max_frmr_depth: %x mr_type: %x",
 334                         server->smbd_conn->responder_resources,
 335                         server->smbd_conn->max_frmr_depth,
 336                         server->smbd_conn->mr_type);
 337                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 338                         atomic_read(&server->smbd_conn->mr_ready_count),
 339                         atomic_read(&server->smbd_conn->mr_used_count));
 340 skip_rdma:
 341 #endif
 342                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 343                         server->credits,  server->dialect);
 344                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 345                         seq_printf(m, " COMPRESS_LZNT1");
 346                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 347                         seq_printf(m, " COMPRESS_LZ77");
 348                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 349                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 350                 if (server->sign)
 351                         seq_printf(m, " signed");
 352                 if (server->posix_ext_supported)
 353                         seq_printf(m, " posix");
 354
 355                 i++;
 356                 list_for_each(tmp2, &server->smb_ses_list) {
 357                         ses = list_entry(tmp2, struct cifs_ses,
 358                                          smb_ses_list);
 359                         if ((ses->serverDomain == NULL) ||
 360                                 (ses->serverOS == NULL) ||
 361                                 (ses->serverNOS == NULL)) {
 362                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 363                                         i, ses->serverName, ses->ses_count,
 364                                         ses->capabilities, ses->status);
 365                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 366                                         seq_printf(m, "Guest\t");
 367                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 368                                         seq_printf(m, "Anonymous\t");
 369                         } else {
 370                                 seq_printf(m,
 371                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 372                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 373                                     " session status: %d ",
 374                                 i, ses->serverName, ses->serverDomain,
 375                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 376                                 ses->capabilities, ses->status);
 377                         }
 378
 379                         seq_printf(m,"Security type: %s\n",
 380                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 381
 382                         if (server->rdma)
 383                                 seq_printf(m, "RDMA\n\t");
 384                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 385                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 386                                    server->tcpStatus,
 387                                    server->reconnect_instance,
 388                                    server->srv_count,
 389                                    server->sec_mode, in_flight(server));
 390
 391                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 392                                 atomic_read(&server->in_send),
 393                                 atomic_read(&server->num_waiters));
 394
 395                         /* dump session id helpful for use with network trace */
 396                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 397                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 398                                 seq_puts(m, " encrypted");
 399                         if (ses->sign)
 400                                 seq_puts(m, " signed");
 401
 402                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 403                                    from_kuid(&init_user_ns, ses->linux_uid),
 404                                    from_kuid(&init_user_ns, ses->cred_uid));
 405
 406                         if (ses->chan_count > 1) {
 407                                 seq_printf(m, "\n\n\tExtra Channels: %zu\n",
 408                                            ses->chan_count-1);
 409                                 for (j = 1; j < ses->chan_count; j++)
 410                                         cifs_dump_channel(m, j, &ses->chans[j]);
 411                         }
 412
 413                         seq_puts(m, "\n\n\tShares:");
 414                         j = 0;
 415
 416                         seq_printf(m, "\n\t%d) IPC: ", j);
 417                         if (ses->tcon_ipc)
 418                                 cifs_debug_tcon(m, ses->tcon_ipc);
 419                         else
 420                                 seq_puts(m, "none\n");
 421
 422                         list_for_each(tmp3, &ses->tcon_list) {
 423                                 tcon = list_entry(tmp3, struct cifs_tcon,
 424                                                   tcon_list);
 425                                 ++j;
 426                                 seq_printf(m, "\n\t%d) ", j);
 427                                 cifs_debug_tcon(m, tcon);
 428                         }
 429
 430                         seq_puts(m, "\n\tMIDs:\n");
 431
 432                         spin_lock(&GlobalMid_Lock);
 433                         list_for_each(tmp3, &server->pending_mid_q) {
 434                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 435                                         qhead);
 436                                 seq_printf(m, "\tState: %d com: %d pid:"
 437                                               " %d cbdata: %p mid %llu\n",
 438                                               mid_entry->mid_state,
 439                                               le16_to_cpu(mid_entry->command),
 440                                               mid_entry->pid,
 441                                               mid_entry->callback_data,
 442                                               mid_entry->mid);
 443                         }
 444                         spin_unlock(&GlobalMid_Lock);
 445
 446                         spin_lock(&ses->iface_lock);
 447                         if (ses->iface_count)
 448                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 449                                            ses->iface_count);
 450                         for (j = 0; j < ses->iface_count; j++) {
 451                                 struct cifs_server_iface *iface;
 452
 453                                 iface = &ses->iface_list[j];
 454                                 seq_printf(m, "\t%d)", j);
 455                                 cifs_dump_iface(m, iface);
 456                                 if (is_ses_using_iface(ses, iface))
 457                                         seq_puts(m, "\t\t[CONNECTED]\n");
 458                         }
 459                         spin_unlock(&ses->iface_lock);
 460                 }
 461         }
 462         spin_unlock(&cifs_tcp_ses_lock);
 463         seq_putc(m, '\n');
 464
 465         /* BB add code to dump additional info such as TCP session info now */
 466         return 0;
 467 }
 468
 469 static ssize_t cifs_stats_proc_write(struct file *file,
 470                 const char __user *buffer, size_t count, loff_t *ppos)
 471 {
 472         bool bv;
 473         int rc;
 474         struct list_head *tmp1, *tmp2, *tmp3;
 475         struct TCP_Server_Info *server;
 476         struct cifs_ses *ses;
 477         struct cifs_tcon *tcon;
 478
 479         rc = kstrtobool_from_user(buffer, count, &bv);
 480         if (rc == 0) {
 481 #ifdef CONFIG_CIFS_STATS2
 482                 int i;
 483
 484                 atomic_set(&totBufAllocCount, 0);
 485                 atomic_set(&totSmBufAllocCount, 0);
 486 #endif /* CONFIG_CIFS_STATS2 */
 487                 atomic_set(&tcpSesReconnectCount, 0);
 488                 atomic_set(&tconInfoReconnectCount, 0);
 489
 490                 spin_lock(&GlobalMid_Lock);
 491                 GlobalMaxActiveXid = 0;
 492                 GlobalCurrentXid = 0;
 493                 spin_unlock(&GlobalMid_Lock);
 494                 spin_lock(&cifs_tcp_ses_lock);
 495                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 496                         server = list_entry(tmp1, struct TCP_Server_Info,
 497                                             tcp_ses_list);
 498                         server->max_in_flight = 0;
 499 #ifdef CONFIG_CIFS_STATS2
 500                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 501                                 atomic_set(&server->num_cmds[i], 0);
 502                                 atomic_set(&server->smb2slowcmd[i], 0);
 503                                 server->time_per_cmd[i] = 0;
 504                                 server->slowest_cmd[i] = 0;
 505                                 server->fastest_cmd[0] = 0;
 506                         }
 507 #endif /* CONFIG_CIFS_STATS2 */
 508                         list_for_each(tmp2, &server->smb_ses_list) {
 509                                 ses = list_entry(tmp2, struct cifs_ses,
 510                                                  smb_ses_list);
 511                                 list_for_each(tmp3, &ses->tcon_list) {
 512                                         tcon = list_entry(tmp3,
 513                                                           struct cifs_tcon,
 514                                                           tcon_list);
 515                                         atomic_set(&tcon->num_smbs_sent, 0);
 516                                         spin_lock(&tcon->stat_lock);
 517                                         tcon->bytes_read = 0;
 518                                         tcon->bytes_written = 0;
 519                                         spin_unlock(&tcon->stat_lock);
 520                                         if (server->ops->clear_stats)
 521                                                 server->ops->clear_stats(tcon);
 522                                 }
 523                         }
 524                 }
 525                 spin_unlock(&cifs_tcp_ses_lock);
 526         } else {
 527                 return rc;
 528         }
 529
 530         return count;
 531 }
 532
 533 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 534 {
 535         int i;
 536 #ifdef CONFIG_CIFS_STATS2
 537         int j;
 538 #endif /* STATS2 */
 539         struct list_head *tmp1, *tmp2, *tmp3;
 540         struct TCP_Server_Info *server;
 541         struct cifs_ses *ses;
 542         struct cifs_tcon *tcon;
 543
 544         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 545                         sesInfoAllocCount.counter);
 546         seq_printf(m, "Share (unique mount targets): %d\n",
 547                         tconInfoAllocCount.counter);
 548         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 549                         bufAllocCount.counter,
 550                         cifs_min_rcv + tcpSesAllocCount.counter);
 551         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 552                         smBufAllocCount.counter, cifs_min_small);
 553 #ifdef CONFIG_CIFS_STATS2
 554         seq_printf(m, "Total Large %d Small %d Allocations\n",
 555                                 atomic_read(&totBufAllocCount),
 556                                 atomic_read(&totSmBufAllocCount));
 557 #endif /* CONFIG_CIFS_STATS2 */
 558
 559         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 560         seq_printf(m,
 561                 "\n%d session %d share reconnects\n",
 562                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 563
 564         seq_printf(m,
 565                 "Total vfs operations: %d maximum at one time: %d\n",
 566                 GlobalCurrentXid, GlobalMaxActiveXid);
 567
 568         i = 0;
 569         spin_lock(&cifs_tcp_ses_lock);
 570         list_for_each(tmp1, &cifs_tcp_ses_list) {
 571                 server = list_entry(tmp1, struct TCP_Server_Info,
 572                                     tcp_ses_list);
 573                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 574 #ifdef CONFIG_CIFS_STATS2
 575                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 576                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 577                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 578                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 579                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 580                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 581                                 atomic_read(&server->num_cmds[j]),
 582                                 server->time_per_cmd[j],
 583                                 server->fastest_cmd[j],
 584                                 server->slowest_cmd[j]);
 585                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 586                         if (atomic_read(&server->smb2slowcmd[j]))
 587                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 588                                         atomic_read(&server->smb2slowcmd[j]),
 589                                         server->hostname, j);
 590 #endif /* STATS2 */
 591                 list_for_each(tmp2, &server->smb_ses_list) {
 592                         ses = list_entry(tmp2, struct cifs_ses,
 593                                          smb_ses_list);
 594                         list_for_each(tmp3, &ses->tcon_list) {
 595                                 tcon = list_entry(tmp3,
 596                                                   struct cifs_tcon,
 597                                                   tcon_list);
 598                                 i++;
 599                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 600                                 if (tcon->need_reconnect)
 601                                         seq_puts(m, "\tDISCONNECTED ");
 602                                 seq_printf(m, "\nSMBs: %d",
 603                                            atomic_read(&tcon->num_smbs_sent));
 604                                 if (server->ops->print_stats)
 605                                         server->ops->print_stats(m, tcon);
 606                         }
 607                 }
 608         }
 609         spin_unlock(&cifs_tcp_ses_lock);
 610
 611         seq_putc(m, '\n');
 612         return 0;
 613 }
 614
 615 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 616 {
 617         return single_open(file, cifs_stats_proc_show, NULL);
 618 }
 619
 620 static const struct proc_ops cifs_stats_proc_ops = {
 621         .proc_open      = cifs_stats_proc_open,
 622         .proc_read      = seq_read,
 623         .proc_lseek     = seq_lseek,
 624         .proc_release   = single_release,
 625         .proc_write     = cifs_stats_proc_write,
 626 };
 627
 628 #ifdef CONFIG_CIFS_SMB_DIRECT
 629 #define PROC_FILE_DEFINE(name) \
 630 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 631         size_t count, loff_t *ppos) \
 632 { \
 633         int rc; \
 634         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 635         if (rc) \
 636                 return rc; \
 637         return count; \
 638 } \
 639 static int name##_proc_show(struct seq_file *m, void *v) \
 640 { \
 641         seq_printf(m, "%d\n", name ); \
 642         return 0; \
 643 } \
 644 static int name##_open(struct inode *inode, struct file *file) \
 645 { \
 646         return single_open(file, name##_proc_show, NULL); \
 647 } \
 648 \
 649 static const struct proc_ops cifs_##name##_proc_fops = { \
 650         .proc_open      = name##_open, \
 651         .proc_read      = seq_read, \
 652         .proc_lseek     = seq_lseek, \
 653         .proc_release   = single_release, \
 654         .proc_write     = name##_write, \
 655 }
 656
 657 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 658 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 659 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 660 PROC_FILE_DEFINE(smbd_max_receive_size);
 661 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 662 PROC_FILE_DEFINE(smbd_max_send_size);
 663 PROC_FILE_DEFINE(smbd_send_credit_target);
 664 PROC_FILE_DEFINE(smbd_receive_credit_max);
 665 #endif
 666
 667 static struct proc_dir_entry *proc_fs_cifs;
 668 static const struct proc_ops cifsFYI_proc_ops;
 669 static const struct proc_ops cifs_lookup_cache_proc_ops;
 670 static const struct proc_ops traceSMB_proc_ops;
 671 static const struct proc_ops cifs_security_flags_proc_ops;
 672 static const struct proc_ops cifs_linux_ext_proc_ops;
 673
 674 void
 675 cifs_proc_init(void)
 676 {
 677         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 678         if (proc_fs_cifs == NULL)
 679                 return;
 680
 681         proc_create_single("DebugData", 0, proc_fs_cifs,
 682                         cifs_debug_data_proc_show);
 683
 684         proc_create_single("open_files", 0400, proc_fs_cifs,
 685                         cifs_debug_files_proc_show);
 686
 687         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 688         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 689         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 690         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 691                     &cifs_linux_ext_proc_ops);
 692         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 693                     &cifs_security_flags_proc_ops);
 694         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 695                     &cifs_lookup_cache_proc_ops);
 696
 697 #ifdef CONFIG_CIFS_DFS_UPCALL
 698         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 699 #endif
 700
 701 #ifdef CONFIG_CIFS_SMB_DIRECT
 702         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 703                 &cifs_rdma_readwrite_threshold_proc_fops);
 704         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 705                 &cifs_smbd_max_frmr_depth_proc_fops);
 706         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 707                 &cifs_smbd_keep_alive_interval_proc_fops);
 708         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 709                 &cifs_smbd_max_receive_size_proc_fops);
 710         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 711                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 712         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 713                 &cifs_smbd_max_send_size_proc_fops);
 714         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 715                 &cifs_smbd_send_credit_target_proc_fops);
 716         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 717                 &cifs_smbd_receive_credit_max_proc_fops);
 718 #endif
 719 }
 720
 721 void
 722 cifs_proc_clean(void)
 723 {
 724         if (proc_fs_cifs == NULL)
 725                 return;
 726
 727         remove_proc_entry("DebugData", proc_fs_cifs);
 728         remove_proc_entry("open_files", proc_fs_cifs);
 729         remove_proc_entry("cifsFYI", proc_fs_cifs);
 730         remove_proc_entry("traceSMB", proc_fs_cifs);
 731         remove_proc_entry("Stats", proc_fs_cifs);
 732         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 733         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 734         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 735
 736 #ifdef CONFIG_CIFS_DFS_UPCALL
 737         remove_proc_entry("dfscache", proc_fs_cifs);
 738 #endif
 739 #ifdef CONFIG_CIFS_SMB_DIRECT
 740         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 741         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 742         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 743         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 744         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 745         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 746         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 747         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 748 #endif
 749         remove_proc_entry("fs/cifs", NULL);
 750 }
 751
 752 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 753 {
 754         seq_printf(m, "%d\n", cifsFYI);
 755         return 0;
 756 }
 757
 758 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 759 {
 760         return single_open(file, cifsFYI_proc_show, NULL);
 761 }
 762
 763 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 764                 size_t count, loff_t *ppos)
 765 {
 766         char c[2] = { '\0' };
 767         bool bv;
 768         int rc;
 769
 770         rc = get_user(c[0], buffer);
 771         if (rc)
 772                 return rc;
 773         if (strtobool(c, &bv) == 0)
 774                 cifsFYI = bv;
 775         else if ((c[0] > '1') && (c[0] <= '9'))
 776                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 777         else
 778                 return -EINVAL;
 779
 780         return count;
 781 }
 782
 783 static const struct proc_ops cifsFYI_proc_ops = {
 784         .proc_open      = cifsFYI_proc_open,
 785         .proc_read      = seq_read,
 786         .proc_lseek     = seq_lseek,
 787         .proc_release   = single_release,
 788         .proc_write     = cifsFYI_proc_write,
 789 };
 790
 791 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 792 {
 793         seq_printf(m, "%d\n", linuxExtEnabled);
 794         return 0;
 795 }
 796
 797 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 798 {
 799         return single_open(file, cifs_linux_ext_proc_show, NULL);
 800 }
 801
 802 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 803                 const char __user *buffer, size_t count, loff_t *ppos)
 804 {
 805         int rc;
 806
 807         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 808         if (rc)
 809                 return rc;
 810
 811         return count;
 812 }
 813
 814 static const struct proc_ops cifs_linux_ext_proc_ops = {
 815         .proc_open      = cifs_linux_ext_proc_open,
 816         .proc_read      = seq_read,
 817         .proc_lseek     = seq_lseek,
 818         .proc_release   = single_release,
 819         .proc_write     = cifs_linux_ext_proc_write,
 820 };
 821
 822 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 823 {
 824         seq_printf(m, "%d\n", lookupCacheEnabled);
 825         return 0;
 826 }
 827
 828 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 829 {
 830         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 831 }
 832
 833 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 834                 const char __user *buffer, size_t count, loff_t *ppos)
 835 {
 836         int rc;
 837
 838         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 839         if (rc)
 840                 return rc;
 841
 842         return count;
 843 }
 844
 845 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 846         .proc_open      = cifs_lookup_cache_proc_open,
 847         .proc_read      = seq_read,
 848         .proc_lseek     = seq_lseek,
 849         .proc_release   = single_release,
 850         .proc_write     = cifs_lookup_cache_proc_write,
 851 };
 852
 853 static int traceSMB_proc_show(struct seq_file *m, void *v)
 854 {
 855         seq_printf(m, "%d\n", traceSMB);
 856         return 0;
 857 }
 858
 859 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 860 {
 861         return single_open(file, traceSMB_proc_show, NULL);
 862 }
 863
 864 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 865                 size_t count, loff_t *ppos)
 866 {
 867         int rc;
 868
 869         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 870         if (rc)
 871                 return rc;
 872
 873         return count;
 874 }
 875
 876 static const struct proc_ops traceSMB_proc_ops = {
 877         .proc_open      = traceSMB_proc_open,
 878         .proc_read      = seq_read,
 879         .proc_lseek     = seq_lseek,
 880         .proc_release   = single_release,
 881         .proc_write     = traceSMB_proc_write,
 882 };
 883
 884 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 885 {
 886         seq_printf(m, "0x%x\n", global_secflags);
 887         return 0;
 888 }
 889
 890 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 891 {
 892         return single_open(file, cifs_security_flags_proc_show, NULL);
 893 }
 894
 895 /*
 896  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 897  * flags except for the ones corresponding to the given MUST flag. If there are
 898  * multiple MUST flags, then try to prefer more secure ones.
 899  */
 900 static void
 901 cifs_security_flags_handle_must_flags(unsigned int *flags)
 902 {
 903         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 904
 905         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 906                 *flags = CIFSSEC_MUST_KRB5;
 907         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 908                 *flags = CIFSSEC_MUST_NTLMSSP;
 909         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 910                 *flags = CIFSSEC_MUST_NTLMV2;
 911         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 912                 *flags = CIFSSEC_MUST_NTLM;
 913         else if (CIFSSEC_MUST_LANMAN &&
 914                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 915                 *flags = CIFSSEC_MUST_LANMAN;
 916         else if (CIFSSEC_MUST_PLNTXT &&
 917                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 918                 *flags = CIFSSEC_MUST_PLNTXT;
 919
 920         *flags |= signflags;
 921 }
 922
 923 static ssize_t cifs_security_flags_proc_write(struct file *file,
 924                 const char __user *buffer, size_t count, loff_t *ppos)
 925 {
 926         int rc;
 927         unsigned int flags;
 928         char flags_string[12];
 929         bool bv;
 930
 931         if ((count < 1) || (count > 11))
 932                 return -EINVAL;
 933
 934         memset(flags_string, 0, 12);
 935
 936         if (copy_from_user(flags_string, buffer, count))
 937                 return -EFAULT;
 938
 939         if (count < 3) {
 940                 /* single char or single char followed by null */
 941                 if (strtobool(flags_string, &bv) == 0) {
 942                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 943                         return count;
 944                 } else if (!isdigit(flags_string[0])) {
 945                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 946                                         flags_string);
 947                         return -EINVAL;
 948                 }
 949         }
 950
 951         /* else we have a number */
 952         rc = kstrtouint(flags_string, 0, &flags);
 953         if (rc) {
 954                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 955                                 flags_string);
 956                 return rc;
 957         }
 958
 959         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 960
 961         if (flags == 0)  {
 962                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 963                 return -EINVAL;
 964         }
 965
 966         if (flags & ~CIFSSEC_MASK) {
 967                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 968                          flags & ~CIFSSEC_MASK);
 969                 return -EINVAL;
 970         }
 971
 972         cifs_security_flags_handle_must_flags(&flags);
 973
 974         /* flags look ok - update the global security flags for cifs module */
 975         global_secflags = flags;
 976         if (global_secflags & CIFSSEC_MUST_SIGN) {
 977                 /* requiring signing implies signing is allowed */
 978                 global_secflags |= CIFSSEC_MAY_SIGN;
 979                 cifs_dbg(FYI, "packet signing now required\n");
 980         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 981                 cifs_dbg(FYI, "packet signing disabled\n");
 982         }
 983         /* BB should we turn on MAY flags for other MUST options? */
 984         return count;
 985 }
 986
 987 static const struct proc_ops cifs_security_flags_proc_ops = {
 988         .proc_open      = cifs_security_flags_proc_open,
 989         .proc_read      = seq_read,
 990         .proc_lseek     = seq_lseek,
 991         .proc_release   = single_release,
 992         .proc_write     = cifs_security_flags_proc_write,
 993 };
 994 #else
 995 inline void cifs_proc_init(void)
 996 {
 997 }
 998
 999 inline void cifs_proc_clean(void)
1000 {
1001 }
1002 #endif /* PROC_FS */