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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
cifs_dump_mem(char * label,void * data,int length)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 
cifs_dump_detail(void * buf,struct TCP_Server_Info * server)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 
cifs_dump_mids(struct TCP_Server_Info * server)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
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)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
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)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 
cifs_debug_files_proc_show(struct seq_file * m,void * v)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 
cifs_debug_data_proc_show(struct seq_file * m,void * v)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 		if (!server->smbd_conn) {
260 			seq_printf(m, "\nSMBDirect transport not available");
261 			goto skip_rdma;
262 		}
263 
264 		seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
265 			"transport status: %x",
266 			server->smbd_conn->protocol,
267 			server->smbd_conn->transport_status);
268 		seq_printf(m, "\nConn receive_credit_max: %x "
269 			"send_credit_target: %x max_send_size: %x",
270 			server->smbd_conn->receive_credit_max,
271 			server->smbd_conn->send_credit_target,
272 			server->smbd_conn->max_send_size);
273 		seq_printf(m, "\nConn max_fragmented_recv_size: %x "
274 			"max_fragmented_send_size: %x max_receive_size:%x",
275 			server->smbd_conn->max_fragmented_recv_size,
276 			server->smbd_conn->max_fragmented_send_size,
277 			server->smbd_conn->max_receive_size);
278 		seq_printf(m, "\nConn keep_alive_interval: %x "
279 			"max_readwrite_size: %x rdma_readwrite_threshold: %x",
280 			server->smbd_conn->keep_alive_interval,
281 			server->smbd_conn->max_readwrite_size,
282 			server->smbd_conn->rdma_readwrite_threshold);
283 		seq_printf(m, "\nDebug count_get_receive_buffer: %x "
284 			"count_put_receive_buffer: %x count_send_empty: %x",
285 			server->smbd_conn->count_get_receive_buffer,
286 			server->smbd_conn->count_put_receive_buffer,
287 			server->smbd_conn->count_send_empty);
288 		seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
289 			"count_enqueue_reassembly_queue: %x "
290 			"count_dequeue_reassembly_queue: %x "
291 			"fragment_reassembly_remaining: %x "
292 			"reassembly_data_length: %x "
293 			"reassembly_queue_length: %x",
294 			server->smbd_conn->count_reassembly_queue,
295 			server->smbd_conn->count_enqueue_reassembly_queue,
296 			server->smbd_conn->count_dequeue_reassembly_queue,
297 			server->smbd_conn->fragment_reassembly_remaining,
298 			server->smbd_conn->reassembly_data_length,
299 			server->smbd_conn->reassembly_queue_length);
300 		seq_printf(m, "\nCurrent Credits send_credits: %x "
301 			"receive_credits: %x receive_credit_target: %x",
302 			atomic_read(&server->smbd_conn->send_credits),
303 			atomic_read(&server->smbd_conn->receive_credits),
304 			server->smbd_conn->receive_credit_target);
305 		seq_printf(m, "\nPending send_pending: %x "
306 			"send_payload_pending: %x",
307 			atomic_read(&server->smbd_conn->send_pending),
308 			atomic_read(&server->smbd_conn->send_payload_pending));
309 		seq_printf(m, "\nReceive buffers count_receive_queue: %x "
310 			"count_empty_packet_queue: %x",
311 			server->smbd_conn->count_receive_queue,
312 			server->smbd_conn->count_empty_packet_queue);
313 		seq_printf(m, "\nMR responder_resources: %x "
314 			"max_frmr_depth: %x mr_type: %x",
315 			server->smbd_conn->responder_resources,
316 			server->smbd_conn->max_frmr_depth,
317 			server->smbd_conn->mr_type);
318 		seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
319 			atomic_read(&server->smbd_conn->mr_ready_count),
320 			atomic_read(&server->smbd_conn->mr_used_count));
321 skip_rdma:
322 #endif
323 		seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
324 			server->credits,  server->dialect);
325 		if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
326 			seq_printf(m, " COMPRESS_LZNT1");
327 		else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
328 			seq_printf(m, " COMPRESS_LZ77");
329 		else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
330 			seq_printf(m, " COMPRESS_LZ77_HUFF");
331 		if (server->sign)
332 			seq_printf(m, " signed");
333 		if (server->posix_ext_supported)
334 			seq_printf(m, " posix");
335 
336 		i++;
337 		list_for_each(tmp2, &server->smb_ses_list) {
338 			ses = list_entry(tmp2, struct cifs_ses,
339 					 smb_ses_list);
340 			if ((ses->serverDomain == NULL) ||
341 				(ses->serverOS == NULL) ||
342 				(ses->serverNOS == NULL)) {
343 				seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
344 					i, ses->serverName, ses->ses_count,
345 					ses->capabilities, ses->status);
346 				if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
347 					seq_printf(m, "Guest\t");
348 				else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
349 					seq_printf(m, "Anonymous\t");
350 			} else {
351 				seq_printf(m,
352 				    "\n%d) Name: %s  Domain: %s Uses: %d OS:"
353 				    " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
354 				    " session status: %d ",
355 				i, ses->serverName, ses->serverDomain,
356 				ses->ses_count, ses->serverOS, ses->serverNOS,
357 				ses->capabilities, ses->status);
358 			}
359 			if (server->rdma)
360 				seq_printf(m, "RDMA\n\t");
361 			seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
362 				   "Server: %d SecMode: 0x%x Req On Wire: %d",
363 				   server->tcpStatus,
364 				   server->reconnect_instance,
365 				   server->srv_count,
366 				   server->sec_mode, in_flight(server));
367 
368 #ifdef CONFIG_CIFS_STATS2
369 			seq_printf(m, " In Send: %d In MaxReq Wait: %d",
370 				atomic_read(&server->in_send),
371 				atomic_read(&server->num_waiters));
372 #endif
373 			/* dump session id helpful for use with network trace */
374 			seq_printf(m, " SessionId: 0x%llx", ses->Suid);
375 			if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
376 				seq_puts(m, " encrypted");
377 			if (ses->sign)
378 				seq_puts(m, " signed");
379 
380 			seq_puts(m, "\n\tShares:");
381 			j = 0;
382 
383 			seq_printf(m, "\n\t%d) IPC: ", j);
384 			if (ses->tcon_ipc)
385 				cifs_debug_tcon(m, ses->tcon_ipc);
386 			else
387 				seq_puts(m, "none\n");
388 
389 			list_for_each(tmp3, &ses->tcon_list) {
390 				tcon = list_entry(tmp3, struct cifs_tcon,
391 						  tcon_list);
392 				++j;
393 				seq_printf(m, "\n\t%d) ", j);
394 				cifs_debug_tcon(m, tcon);
395 			}
396 
397 			seq_puts(m, "\n\tMIDs:\n");
398 
399 			spin_lock(&GlobalMid_Lock);
400 			list_for_each(tmp3, &server->pending_mid_q) {
401 				mid_entry = list_entry(tmp3, struct mid_q_entry,
402 					qhead);
403 				seq_printf(m, "\tState: %d com: %d pid:"
404 					      " %d cbdata: %p mid %llu\n",
405 					      mid_entry->mid_state,
406 					      le16_to_cpu(mid_entry->command),
407 					      mid_entry->pid,
408 					      mid_entry->callback_data,
409 					      mid_entry->mid);
410 			}
411 			spin_unlock(&GlobalMid_Lock);
412 
413 			spin_lock(&ses->iface_lock);
414 			if (ses->iface_count)
415 				seq_printf(m, "\n\tServer interfaces: %zu\n",
416 					   ses->iface_count);
417 			for (j = 0; j < ses->iface_count; j++) {
418 				seq_printf(m, "\t%d)", j);
419 				cifs_dump_iface(m, &ses->iface_list[j]);
420 			}
421 			spin_unlock(&ses->iface_lock);
422 		}
423 	}
424 	spin_unlock(&cifs_tcp_ses_lock);
425 	seq_putc(m, '\n');
426 
427 	/* BB add code to dump additional info such as TCP session info now */
428 	return 0;
429 }
430 
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)431 static ssize_t cifs_stats_proc_write(struct file *file,
432 		const char __user *buffer, size_t count, loff_t *ppos)
433 {
434 	bool bv;
435 	int rc;
436 	struct list_head *tmp1, *tmp2, *tmp3;
437 	struct TCP_Server_Info *server;
438 	struct cifs_ses *ses;
439 	struct cifs_tcon *tcon;
440 
441 	rc = kstrtobool_from_user(buffer, count, &bv);
442 	if (rc == 0) {
443 #ifdef CONFIG_CIFS_STATS2
444 		int i;
445 
446 		atomic_set(&totBufAllocCount, 0);
447 		atomic_set(&totSmBufAllocCount, 0);
448 #endif /* CONFIG_CIFS_STATS2 */
449 		atomic_set(&tcpSesReconnectCount, 0);
450 		atomic_set(&tconInfoReconnectCount, 0);
451 
452 		spin_lock(&GlobalMid_Lock);
453 		GlobalMaxActiveXid = 0;
454 		GlobalCurrentXid = 0;
455 		spin_unlock(&GlobalMid_Lock);
456 		spin_lock(&cifs_tcp_ses_lock);
457 		list_for_each(tmp1, &cifs_tcp_ses_list) {
458 			server = list_entry(tmp1, struct TCP_Server_Info,
459 					    tcp_ses_list);
460 			server->max_in_flight = 0;
461 #ifdef CONFIG_CIFS_STATS2
462 			for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
463 				atomic_set(&server->num_cmds[i], 0);
464 				atomic_set(&server->smb2slowcmd[i], 0);
465 				server->time_per_cmd[i] = 0;
466 				server->slowest_cmd[i] = 0;
467 				server->fastest_cmd[0] = 0;
468 			}
469 #endif /* CONFIG_CIFS_STATS2 */
470 			list_for_each(tmp2, &server->smb_ses_list) {
471 				ses = list_entry(tmp2, struct cifs_ses,
472 						 smb_ses_list);
473 				list_for_each(tmp3, &ses->tcon_list) {
474 					tcon = list_entry(tmp3,
475 							  struct cifs_tcon,
476 							  tcon_list);
477 					atomic_set(&tcon->num_smbs_sent, 0);
478 					spin_lock(&tcon->stat_lock);
479 					tcon->bytes_read = 0;
480 					tcon->bytes_written = 0;
481 					spin_unlock(&tcon->stat_lock);
482 					if (server->ops->clear_stats)
483 						server->ops->clear_stats(tcon);
484 				}
485 			}
486 		}
487 		spin_unlock(&cifs_tcp_ses_lock);
488 	} else {
489 		return rc;
490 	}
491 
492 	return count;
493 }
494 
cifs_stats_proc_show(struct seq_file * m,void * v)495 static int cifs_stats_proc_show(struct seq_file *m, void *v)
496 {
497 	int i;
498 #ifdef CONFIG_CIFS_STATS2
499 	int j;
500 #endif /* STATS2 */
501 	struct list_head *tmp1, *tmp2, *tmp3;
502 	struct TCP_Server_Info *server;
503 	struct cifs_ses *ses;
504 	struct cifs_tcon *tcon;
505 
506 	seq_printf(m, "Resources in use\nCIFS Session: %d\n",
507 			sesInfoAllocCount.counter);
508 	seq_printf(m, "Share (unique mount targets): %d\n",
509 			tconInfoAllocCount.counter);
510 	seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
511 			bufAllocCount.counter,
512 			cifs_min_rcv + tcpSesAllocCount.counter);
513 	seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
514 			smBufAllocCount.counter, cifs_min_small);
515 #ifdef CONFIG_CIFS_STATS2
516 	seq_printf(m, "Total Large %d Small %d Allocations\n",
517 				atomic_read(&totBufAllocCount),
518 				atomic_read(&totSmBufAllocCount));
519 #endif /* CONFIG_CIFS_STATS2 */
520 
521 	seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
522 	seq_printf(m,
523 		"\n%d session %d share reconnects\n",
524 		tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
525 
526 	seq_printf(m,
527 		"Total vfs operations: %d maximum at one time: %d\n",
528 		GlobalCurrentXid, GlobalMaxActiveXid);
529 
530 	i = 0;
531 	spin_lock(&cifs_tcp_ses_lock);
532 	list_for_each(tmp1, &cifs_tcp_ses_list) {
533 		server = list_entry(tmp1, struct TCP_Server_Info,
534 				    tcp_ses_list);
535 		seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
536 #ifdef CONFIG_CIFS_STATS2
537 		seq_puts(m, "\nTotal time spent processing by command. Time ");
538 		seq_printf(m, "units are jiffies (%d per second)\n", HZ);
539 		seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
540 		seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
541 		for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
542 			seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
543 				atomic_read(&server->num_cmds[j]),
544 				server->time_per_cmd[j],
545 				server->fastest_cmd[j],
546 				server->slowest_cmd[j]);
547 		for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
548 			if (atomic_read(&server->smb2slowcmd[j]))
549 				seq_printf(m, "  %d slow responses from %s for command %d\n",
550 					atomic_read(&server->smb2slowcmd[j]),
551 					server->hostname, j);
552 #endif /* STATS2 */
553 		list_for_each(tmp2, &server->smb_ses_list) {
554 			ses = list_entry(tmp2, struct cifs_ses,
555 					 smb_ses_list);
556 			list_for_each(tmp3, &ses->tcon_list) {
557 				tcon = list_entry(tmp3,
558 						  struct cifs_tcon,
559 						  tcon_list);
560 				i++;
561 				seq_printf(m, "\n%d) %s", i, tcon->treeName);
562 				if (tcon->need_reconnect)
563 					seq_puts(m, "\tDISCONNECTED ");
564 				seq_printf(m, "\nSMBs: %d",
565 					   atomic_read(&tcon->num_smbs_sent));
566 				if (server->ops->print_stats)
567 					server->ops->print_stats(m, tcon);
568 			}
569 		}
570 	}
571 	spin_unlock(&cifs_tcp_ses_lock);
572 
573 	seq_putc(m, '\n');
574 	return 0;
575 }
576 
cifs_stats_proc_open(struct inode * inode,struct file * file)577 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
578 {
579 	return single_open(file, cifs_stats_proc_show, NULL);
580 }
581 
582 static const struct file_operations cifs_stats_proc_fops = {
583 	.open		= cifs_stats_proc_open,
584 	.read		= seq_read,
585 	.llseek		= seq_lseek,
586 	.release	= single_release,
587 	.write		= cifs_stats_proc_write,
588 };
589 
590 #ifdef CONFIG_CIFS_SMB_DIRECT
591 #define PROC_FILE_DEFINE(name) \
592 static ssize_t name##_write(struct file *file, const char __user *buffer, \
593 	size_t count, loff_t *ppos) \
594 { \
595 	int rc; \
596 	rc = kstrtoint_from_user(buffer, count, 10, & name); \
597 	if (rc) \
598 		return rc; \
599 	return count; \
600 } \
601 static int name##_proc_show(struct seq_file *m, void *v) \
602 { \
603 	seq_printf(m, "%d\n", name ); \
604 	return 0; \
605 } \
606 static int name##_open(struct inode *inode, struct file *file) \
607 { \
608 	return single_open(file, name##_proc_show, NULL); \
609 } \
610 \
611 static const struct file_operations cifs_##name##_proc_fops = { \
612 	.open		= name##_open, \
613 	.read		= seq_read, \
614 	.llseek		= seq_lseek, \
615 	.release	= single_release, \
616 	.write		= name##_write, \
617 }
618 
619 PROC_FILE_DEFINE(rdma_readwrite_threshold);
620 PROC_FILE_DEFINE(smbd_max_frmr_depth);
621 PROC_FILE_DEFINE(smbd_keep_alive_interval);
622 PROC_FILE_DEFINE(smbd_max_receive_size);
623 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
624 PROC_FILE_DEFINE(smbd_max_send_size);
625 PROC_FILE_DEFINE(smbd_send_credit_target);
626 PROC_FILE_DEFINE(smbd_receive_credit_max);
627 #endif
628 
629 static struct proc_dir_entry *proc_fs_cifs;
630 static const struct file_operations cifsFYI_proc_fops;
631 static const struct file_operations cifs_lookup_cache_proc_fops;
632 static const struct file_operations traceSMB_proc_fops;
633 static const struct file_operations cifs_security_flags_proc_fops;
634 static const struct file_operations cifs_linux_ext_proc_fops;
635 
636 void
cifs_proc_init(void)637 cifs_proc_init(void)
638 {
639 	proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
640 	if (proc_fs_cifs == NULL)
641 		return;
642 
643 	proc_create_single("DebugData", 0, proc_fs_cifs,
644 			cifs_debug_data_proc_show);
645 
646 	proc_create_single("open_files", 0400, proc_fs_cifs,
647 			cifs_debug_files_proc_show);
648 
649 	proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
650 	proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
651 	proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
652 	proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
653 		    &cifs_linux_ext_proc_fops);
654 	proc_create("SecurityFlags", 0644, proc_fs_cifs,
655 		    &cifs_security_flags_proc_fops);
656 	proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
657 		    &cifs_lookup_cache_proc_fops);
658 
659 #ifdef CONFIG_CIFS_DFS_UPCALL
660 	proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
661 #endif
662 
663 #ifdef CONFIG_CIFS_SMB_DIRECT
664 	proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
665 		&cifs_rdma_readwrite_threshold_proc_fops);
666 	proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
667 		&cifs_smbd_max_frmr_depth_proc_fops);
668 	proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
669 		&cifs_smbd_keep_alive_interval_proc_fops);
670 	proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
671 		&cifs_smbd_max_receive_size_proc_fops);
672 	proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
673 		&cifs_smbd_max_fragmented_recv_size_proc_fops);
674 	proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
675 		&cifs_smbd_max_send_size_proc_fops);
676 	proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
677 		&cifs_smbd_send_credit_target_proc_fops);
678 	proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
679 		&cifs_smbd_receive_credit_max_proc_fops);
680 #endif
681 }
682 
683 void
cifs_proc_clean(void)684 cifs_proc_clean(void)
685 {
686 	if (proc_fs_cifs == NULL)
687 		return;
688 
689 	remove_proc_entry("DebugData", proc_fs_cifs);
690 	remove_proc_entry("open_files", proc_fs_cifs);
691 	remove_proc_entry("cifsFYI", proc_fs_cifs);
692 	remove_proc_entry("traceSMB", proc_fs_cifs);
693 	remove_proc_entry("Stats", proc_fs_cifs);
694 	remove_proc_entry("SecurityFlags", proc_fs_cifs);
695 	remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
696 	remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
697 
698 #ifdef CONFIG_CIFS_DFS_UPCALL
699 	remove_proc_entry("dfscache", proc_fs_cifs);
700 #endif
701 #ifdef CONFIG_CIFS_SMB_DIRECT
702 	remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
703 	remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
704 	remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
705 	remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
706 	remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
707 	remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
708 	remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
709 	remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
710 #endif
711 	remove_proc_entry("fs/cifs", NULL);
712 }
713 
cifsFYI_proc_show(struct seq_file * m,void * v)714 static int cifsFYI_proc_show(struct seq_file *m, void *v)
715 {
716 	seq_printf(m, "%d\n", cifsFYI);
717 	return 0;
718 }
719 
cifsFYI_proc_open(struct inode * inode,struct file * file)720 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
721 {
722 	return single_open(file, cifsFYI_proc_show, NULL);
723 }
724 
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)725 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
726 		size_t count, loff_t *ppos)
727 {
728 	char c[2] = { '\0' };
729 	bool bv;
730 	int rc;
731 
732 	rc = get_user(c[0], buffer);
733 	if (rc)
734 		return rc;
735 	if (strtobool(c, &bv) == 0)
736 		cifsFYI = bv;
737 	else if ((c[0] > '1') && (c[0] <= '9'))
738 		cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
739 	else
740 		return -EINVAL;
741 
742 	return count;
743 }
744 
745 static const struct file_operations cifsFYI_proc_fops = {
746 	.open		= cifsFYI_proc_open,
747 	.read		= seq_read,
748 	.llseek		= seq_lseek,
749 	.release	= single_release,
750 	.write		= cifsFYI_proc_write,
751 };
752 
cifs_linux_ext_proc_show(struct seq_file * m,void * v)753 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
754 {
755 	seq_printf(m, "%d\n", linuxExtEnabled);
756 	return 0;
757 }
758 
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)759 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
760 {
761 	return single_open(file, cifs_linux_ext_proc_show, NULL);
762 }
763 
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)764 static ssize_t cifs_linux_ext_proc_write(struct file *file,
765 		const char __user *buffer, size_t count, loff_t *ppos)
766 {
767 	int rc;
768 
769 	rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
770 	if (rc)
771 		return rc;
772 
773 	return count;
774 }
775 
776 static const struct file_operations cifs_linux_ext_proc_fops = {
777 	.open		= cifs_linux_ext_proc_open,
778 	.read		= seq_read,
779 	.llseek		= seq_lseek,
780 	.release	= single_release,
781 	.write		= cifs_linux_ext_proc_write,
782 };
783 
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)784 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
785 {
786 	seq_printf(m, "%d\n", lookupCacheEnabled);
787 	return 0;
788 }
789 
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)790 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
791 {
792 	return single_open(file, cifs_lookup_cache_proc_show, NULL);
793 }
794 
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)795 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
796 		const char __user *buffer, size_t count, loff_t *ppos)
797 {
798 	int rc;
799 
800 	rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
801 	if (rc)
802 		return rc;
803 
804 	return count;
805 }
806 
807 static const struct file_operations cifs_lookup_cache_proc_fops = {
808 	.open		= cifs_lookup_cache_proc_open,
809 	.read		= seq_read,
810 	.llseek		= seq_lseek,
811 	.release	= single_release,
812 	.write		= cifs_lookup_cache_proc_write,
813 };
814 
traceSMB_proc_show(struct seq_file * m,void * v)815 static int traceSMB_proc_show(struct seq_file *m, void *v)
816 {
817 	seq_printf(m, "%d\n", traceSMB);
818 	return 0;
819 }
820 
traceSMB_proc_open(struct inode * inode,struct file * file)821 static int traceSMB_proc_open(struct inode *inode, struct file *file)
822 {
823 	return single_open(file, traceSMB_proc_show, NULL);
824 }
825 
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)826 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
827 		size_t count, loff_t *ppos)
828 {
829 	int rc;
830 
831 	rc = kstrtobool_from_user(buffer, count, &traceSMB);
832 	if (rc)
833 		return rc;
834 
835 	return count;
836 }
837 
838 static const struct file_operations traceSMB_proc_fops = {
839 	.open		= traceSMB_proc_open,
840 	.read		= seq_read,
841 	.llseek		= seq_lseek,
842 	.release	= single_release,
843 	.write		= traceSMB_proc_write,
844 };
845 
cifs_security_flags_proc_show(struct seq_file * m,void * v)846 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
847 {
848 	seq_printf(m, "0x%x\n", global_secflags);
849 	return 0;
850 }
851 
cifs_security_flags_proc_open(struct inode * inode,struct file * file)852 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
853 {
854 	return single_open(file, cifs_security_flags_proc_show, NULL);
855 }
856 
857 /*
858  * Ensure that if someone sets a MUST flag, that we disable all other MAY
859  * flags except for the ones corresponding to the given MUST flag. If there are
860  * multiple MUST flags, then try to prefer more secure ones.
861  */
862 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)863 cifs_security_flags_handle_must_flags(unsigned int *flags)
864 {
865 	unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
866 
867 	if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
868 		*flags = CIFSSEC_MUST_KRB5;
869 	else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
870 		*flags = CIFSSEC_MUST_NTLMSSP;
871 	else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
872 		*flags = CIFSSEC_MUST_NTLMV2;
873 	else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
874 		*flags = CIFSSEC_MUST_NTLM;
875 	else if (CIFSSEC_MUST_LANMAN &&
876 		 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
877 		*flags = CIFSSEC_MUST_LANMAN;
878 	else if (CIFSSEC_MUST_PLNTXT &&
879 		 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
880 		*flags = CIFSSEC_MUST_PLNTXT;
881 
882 	*flags |= signflags;
883 }
884 
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)885 static ssize_t cifs_security_flags_proc_write(struct file *file,
886 		const char __user *buffer, size_t count, loff_t *ppos)
887 {
888 	int rc;
889 	unsigned int flags;
890 	char flags_string[12];
891 	bool bv;
892 
893 	if ((count < 1) || (count > 11))
894 		return -EINVAL;
895 
896 	memset(flags_string, 0, 12);
897 
898 	if (copy_from_user(flags_string, buffer, count))
899 		return -EFAULT;
900 
901 	if (count < 3) {
902 		/* single char or single char followed by null */
903 		if (strtobool(flags_string, &bv) == 0) {
904 			global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
905 			return count;
906 		} else if (!isdigit(flags_string[0])) {
907 			cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
908 					flags_string);
909 			return -EINVAL;
910 		}
911 	}
912 
913 	/* else we have a number */
914 	rc = kstrtouint(flags_string, 0, &flags);
915 	if (rc) {
916 		cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
917 				flags_string);
918 		return rc;
919 	}
920 
921 	cifs_dbg(FYI, "sec flags 0x%x\n", flags);
922 
923 	if (flags == 0)  {
924 		cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
925 		return -EINVAL;
926 	}
927 
928 	if (flags & ~CIFSSEC_MASK) {
929 		cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
930 			 flags & ~CIFSSEC_MASK);
931 		return -EINVAL;
932 	}
933 
934 	cifs_security_flags_handle_must_flags(&flags);
935 
936 	/* flags look ok - update the global security flags for cifs module */
937 	global_secflags = flags;
938 	if (global_secflags & CIFSSEC_MUST_SIGN) {
939 		/* requiring signing implies signing is allowed */
940 		global_secflags |= CIFSSEC_MAY_SIGN;
941 		cifs_dbg(FYI, "packet signing now required\n");
942 	} else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
943 		cifs_dbg(FYI, "packet signing disabled\n");
944 	}
945 	/* BB should we turn on MAY flags for other MUST options? */
946 	return count;
947 }
948 
949 static const struct file_operations cifs_security_flags_proc_fops = {
950 	.open		= cifs_security_flags_proc_open,
951 	.read		= seq_read,
952 	.llseek		= seq_lseek,
953 	.release	= single_release,
954 	.write		= cifs_security_flags_proc_write,
955 };
956 #else
cifs_proc_init(void)957 inline void cifs_proc_init(void)
958 {
959 }
960 
cifs_proc_clean(void)961 inline void cifs_proc_clean(void)
962 {
963 }
964 #endif /* PROC_FS */
965