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TOMOYO Linux Cross Reference
Linux/fs/cifs/cifs_debug.c

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

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