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

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

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