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