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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs_debug.c
3 *
Steve Frenchb8643e12005-04-28 22:41:07 -07004 * Copyright (C) International Business Machines Corp., 2000,2005
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
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
Steve French221601c2007-06-05 20:35:06 +000010 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * (at your option) any later version.
Steve French221601c2007-06-05 20:35:06 +000012 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * 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
Steve French221601c2007-06-05 20:35:06 +000019 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 * 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 <asm/uaccess.h>
28#include "cifspdu.h"
29#include "cifsglob.h"
30#include "cifsproto.h"
31#include "cifs_debug.h"
Steve French6c91d362005-04-28 22:41:06 -070032#include "cifsfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34void
35cifs_dump_mem(char *label, void *data, int length)
36{
Steve French221601c2007-06-05 20:35:06 +000037 printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 label, length, data);
Andy Shevchenko55d83e02014-08-27 16:49:43 +030039 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
40 data, length, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041}
42
Joe Perchesf96637b2013-05-04 22:12:25 -050043#ifdef CONFIG_CIFS_DEBUG
44void cifs_vfs_err(const char *fmt, ...)
45{
46 struct va_format vaf;
47 va_list args;
48
49 va_start(args, fmt);
50
51 vaf.fmt = fmt;
52 vaf.va = &args;
53
54 printk(KERN_ERR "CIFS VFS: %pV", &vaf);
55
56 va_end(args);
57}
58#endif
59
Pavel Shilovskyd4e48542012-03-23 14:28:02 -040060void cifs_dump_detail(void *buf)
Steve French39798772006-05-31 22:40:51 +000061{
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +040062#ifdef CONFIG_CIFS_DEBUG2
Pavel Shilovskyd4e48542012-03-23 14:28:02 -040063 struct smb_hdr *smb = (struct smb_hdr *)buf;
64
Joe Perchesf96637b2013-05-04 22:12:25 -050065 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
66 smb->Command, smb->Status.CifsError,
67 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
68 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smbCalcSize(smb));
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +040069#endif /* CONFIG_CIFS_DEBUG2 */
Steve French39798772006-05-31 22:40:51 +000070}
71
Steve Frenchffdd6e42007-06-24 21:15:44 +000072void cifs_dump_mids(struct TCP_Server_Info *server)
Steve French39798772006-05-31 22:40:51 +000073{
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +040074#ifdef CONFIG_CIFS_DEBUG2
Steve French39798772006-05-31 22:40:51 +000075 struct list_head *tmp;
Steve Frenchffdd6e42007-06-24 21:15:44 +000076 struct mid_q_entry *mid_entry;
Steve French39798772006-05-31 22:40:51 +000077
Steve French221601c2007-06-05 20:35:06 +000078 if (server == NULL)
Steve French39798772006-05-31 22:40:51 +000079 return;
80
Joe Perchesf96637b2013-05-04 22:12:25 -050081 cifs_dbg(VFS, "Dump pending requests:\n");
Steve French39798772006-05-31 22:40:51 +000082 spin_lock(&GlobalMid_Lock);
83 list_for_each(tmp, &server->pending_mid_q) {
84 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -050085 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
86 mid_entry->mid_state,
87 le16_to_cpu(mid_entry->command),
88 mid_entry->pid,
89 mid_entry->callback_data,
90 mid_entry->mid);
Steve French39798772006-05-31 22:40:51 +000091#ifdef CONFIG_CIFS_STATS2
Joe Perchesf96637b2013-05-04 22:12:25 -050092 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
93 mid_entry->large_buf,
94 mid_entry->resp_buf,
95 mid_entry->when_received,
96 jiffies);
Steve French39798772006-05-31 22:40:51 +000097#endif /* STATS2 */
Joe Perchesf96637b2013-05-04 22:12:25 -050098 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
99 mid_entry->multiRsp, mid_entry->multiEnd);
Steve Frenchad8b15f2008-08-08 21:10:16 +0000100 if (mid_entry->resp_buf) {
101 cifs_dump_detail(mid_entry->resp_buf);
102 cifs_dump_mem("existing buf: ",
103 mid_entry->resp_buf, 62);
Steve French39798772006-05-31 22:40:51 +0000104 }
105 }
106 spin_unlock(&GlobalMid_Lock);
Steve French39798772006-05-31 22:40:51 +0000107#endif /* CONFIG_CIFS_DEBUG2 */
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400108}
Steve French39798772006-05-31 22:40:51 +0000109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110#ifdef CONFIG_PROC_FS
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000111static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112{
Jeff Laytonf1987b42008-11-15 11:12:47 -0500113 struct list_head *tmp1, *tmp2, *tmp3;
Steve Frenchffdd6e42007-06-24 21:15:44 +0000114 struct mid_q_entry *mid_entry;
Jeff Layton14fbf502008-11-14 13:53:46 -0500115 struct TCP_Server_Info *server;
Steve French96daf2b2011-05-27 04:34:02 +0000116 struct cifs_ses *ses;
117 struct cifs_tcon *tcon;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500118 int i, j;
119 __u32 dev_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000121 seq_puts(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 "Display Internal CIFS Data Structures for Debugging\n"
123 "---------------------------------------------------\n");
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000124 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
Jeff Laytonca40b712011-01-07 11:30:29 -0500125 seq_printf(m, "Features:");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530126#ifdef CONFIG_CIFS_DFS_UPCALL
Jeff Laytonca40b712011-01-07 11:30:29 -0500127 seq_printf(m, " dfs");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530128#endif
129#ifdef CONFIG_CIFS_FSCACHE
Jeff Laytonca40b712011-01-07 11:30:29 -0500130 seq_printf(m, " fscache");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530131#endif
132#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Laytonca40b712011-01-07 11:30:29 -0500133 seq_printf(m, " lanman");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530134#endif
135#ifdef CONFIG_CIFS_POSIX
Jeff Laytonca40b712011-01-07 11:30:29 -0500136 seq_printf(m, " posix");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530137#endif
138#ifdef CONFIG_CIFS_UPCALL
Jeff Laytonca40b712011-01-07 11:30:29 -0500139 seq_printf(m, " spnego");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530140#endif
141#ifdef CONFIG_CIFS_XATTR
Jeff Laytonca40b712011-01-07 11:30:29 -0500142 seq_printf(m, " xattr");
143#endif
144#ifdef CONFIG_CIFS_ACL
145 seq_printf(m, " acl");
Suresh Jayaramanf5799032010-07-30 18:25:56 +0530146#endif
147 seq_putc(m, '\n');
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000148 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
149 seq_printf(m, "Servers:");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 i = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530152 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500153 list_for_each(tmp1, &cifs_tcp_ses_list) {
154 server = list_entry(tmp1, struct TCP_Server_Info,
Jeff Layton14fbf502008-11-14 13:53:46 -0500155 tcp_ses_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 i++;
Jeff Layton14fbf502008-11-14 13:53:46 -0500157 list_for_each(tmp2, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000158 ses = list_entry(tmp2, struct cifs_ses,
Jeff Layton14fbf502008-11-14 13:53:46 -0500159 smb_ses_list);
160 if ((ses->serverDomain == NULL) ||
161 (ses->serverOS == NULL) ||
162 (ses->serverNOS == NULL)) {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500163 seq_printf(m, "\n%d) entry for %s not fully "
164 "displayed\n\t", i, ses->serverName);
Jeff Layton14fbf502008-11-14 13:53:46 -0500165 } else {
166 seq_printf(m,
Jeff Laytonf1987b42008-11-15 11:12:47 -0500167 "\n%d) Name: %s Domain: %s Uses: %d OS:"
168 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
Steve French221601c2007-06-05 20:35:06 +0000169 " session status: %d\t",
Steve Frenchb8643e12005-04-28 22:41:07 -0700170 i, ses->serverName, ses->serverDomain,
Jeff Layton14fbf502008-11-14 13:53:46 -0500171 ses->ses_count, ses->serverOS, ses->serverNOS,
Steve French221601c2007-06-05 20:35:06 +0000172 ses->capabilities, ses->status);
Jeff Layton14fbf502008-11-14 13:53:46 -0500173 }
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000174 seq_printf(m, "TCP status: %d\n\tLocal Users To "
Jeff Layton14fbf502008-11-14 13:53:46 -0500175 "Server: %d SecMode: 0x%x Req On Wire: %d",
176 server->tcpStatus, server->srv_count,
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300177 server->sec_mode, in_flight(server));
Steve French131afd0b2005-10-07 09:51:05 -0700178
179#ifdef CONFIG_CIFS_STATS2
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000180 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
Steve French789e6662011-08-09 18:44:44 +0000181 atomic_read(&server->in_send),
Jeff Layton14fbf502008-11-14 13:53:46 -0500182 atomic_read(&server->num_waiters));
Steve French131afd0b2005-10-07 09:51:05 -0700183#endif
184
Jeff Laytonf1987b42008-11-15 11:12:47 -0500185 seq_puts(m, "\n\tShares:");
186 j = 0;
187 list_for_each(tmp3, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000188 tcon = list_entry(tmp3, struct cifs_tcon,
Jeff Laytonf1987b42008-11-15 11:12:47 -0500189 tcon_list);
190 ++j;
191 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
192 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
193 tcon->treeName, tcon->tc_count);
194 if (tcon->nativeFileSystem) {
195 seq_printf(m, "Type: %s ",
196 tcon->nativeFileSystem);
197 }
198 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
Steve French59b04c52014-08-02 21:16:48 -0500199 "\n\tPathComponentMax: %d Status: %d",
Jeff Laytonf1987b42008-11-15 11:12:47 -0500200 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
201 le32_to_cpu(tcon->fsAttrInfo.Attributes),
202 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
203 tcon->tidStatus);
204 if (dev_type == FILE_DEVICE_DISK)
205 seq_puts(m, " type: DISK ");
206 else if (dev_type == FILE_DEVICE_CD_ROM)
207 seq_puts(m, " type: CDROM ");
208 else
209 seq_printf(m, " type: %d ", dev_type);
Steve French769ee6a2013-06-19 14:15:30 -0500210 if (server->ops->dump_share_caps)
211 server->ops->dump_share_caps(m, tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500212
213 if (tcon->need_reconnect)
214 seq_puts(m, "\tDISCONNECTED ");
215 seq_putc(m, '\n');
216 }
217
218 seq_puts(m, "\n\tMIDs:\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 spin_lock(&GlobalMid_Lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500221 list_for_each(tmp3, &server->pending_mid_q) {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500222 mid_entry = list_entry(tmp3, struct mid_q_entry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 qhead);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500224 seq_printf(m, "\tState: %d com: %d pid:"
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400225 " %d cbdata: %p mid %llu\n",
226 mid_entry->mid_state,
227 le16_to_cpu(mid_entry->command),
228 mid_entry->pid,
229 mid_entry->callback_data,
230 mid_entry->mid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 }
Steve French221601c2007-06-05 20:35:06 +0000232 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530235 spin_unlock(&cifs_tcp_ses_lock);
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000236 seq_putc(m, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 /* BB add code to dump additional info such as TCP session info now */
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000239 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000242static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
243{
244 return single_open(file, cifs_debug_data_proc_show, NULL);
245}
Steve French1047abc2005-10-11 19:58:06 -0700246
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000247static const struct file_operations cifs_debug_data_proc_fops = {
248 .owner = THIS_MODULE,
249 .open = cifs_debug_data_proc_open,
250 .read = seq_read,
251 .llseek = seq_lseek,
252 .release = single_release,
253};
254
255#ifdef CONFIG_CIFS_STATS
256static ssize_t cifs_stats_proc_write(struct file *file,
257 const char __user *buffer, size_t count, loff_t *ppos)
Steve French1047abc2005-10-11 19:58:06 -0700258{
Steve French221601c2007-06-05 20:35:06 +0000259 char c;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300260 bool bv;
Steve French221601c2007-06-05 20:35:06 +0000261 int rc;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500262 struct list_head *tmp1, *tmp2, *tmp3;
263 struct TCP_Server_Info *server;
Steve French96daf2b2011-05-27 04:34:02 +0000264 struct cifs_ses *ses;
265 struct cifs_tcon *tcon;
Steve French1047abc2005-10-11 19:58:06 -0700266
Steve French221601c2007-06-05 20:35:06 +0000267 rc = get_user(c, buffer);
268 if (rc)
269 return rc;
Steve French1047abc2005-10-11 19:58:06 -0700270
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300271 if (strtobool(&c, &bv) == 0) {
Steve French4498eed52005-12-03 13:58:57 -0800272#ifdef CONFIG_CIFS_STATS2
273 atomic_set(&totBufAllocCount, 0);
274 atomic_set(&totSmBufAllocCount, 0);
275#endif /* CONFIG_CIFS_STATS2 */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530276 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500277 list_for_each(tmp1, &cifs_tcp_ses_list) {
278 server = list_entry(tmp1, struct TCP_Server_Info,
279 tcp_ses_list);
Steve Frenchc2b33822008-11-17 03:57:13 +0000280 list_for_each(tmp2, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000281 ses = list_entry(tmp2, struct cifs_ses,
Steve Frenchc2b33822008-11-17 03:57:13 +0000282 smb_ses_list);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500283 list_for_each(tmp3, &ses->tcon_list) {
284 tcon = list_entry(tmp3,
Steve French96daf2b2011-05-27 04:34:02 +0000285 struct cifs_tcon,
Jeff Laytonf1987b42008-11-15 11:12:47 -0500286 tcon_list);
287 atomic_set(&tcon->num_smbs_sent, 0);
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400288 if (server->ops->clear_stats)
289 server->ops->clear_stats(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500290 }
291 }
Steve French1047abc2005-10-11 19:58:06 -0700292 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530293 spin_unlock(&cifs_tcp_ses_lock);
Steve French1047abc2005-10-11 19:58:06 -0700294 }
295
Steve French221601c2007-06-05 20:35:06 +0000296 return count;
Steve French1047abc2005-10-11 19:58:06 -0700297}
298
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000299static int cifs_stats_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000301 int i;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500302 struct list_head *tmp1, *tmp2, *tmp3;
303 struct TCP_Server_Info *server;
Steve French96daf2b2011-05-27 04:34:02 +0000304 struct cifs_ses *ses;
305 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000307 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 "Resources in use\nCIFS Session: %d\n",
309 sesInfoAllocCount.counter);
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000310 seq_printf(m, "Share (unique mount targets): %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 tconInfoAllocCount.counter);
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000312 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
Steve Frenchb8643e12005-04-28 22:41:07 -0700313 bufAllocCount.counter,
314 cifs_min_rcv + tcpSesAllocCount.counter);
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000315 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
Steve French221601c2007-06-05 20:35:06 +0000316 smBufAllocCount.counter, cifs_min_small);
Steve French07475ff2005-12-03 14:11:37 -0800317#ifdef CONFIG_CIFS_STATS2
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000318 seq_printf(m, "Total Large %d Small %d Allocations\n",
Steve French07475ff2005-12-03 14:11:37 -0800319 atomic_read(&totBufAllocCount),
Steve French221601c2007-06-05 20:35:06 +0000320 atomic_read(&totSmBufAllocCount));
Steve French07475ff2005-12-03 14:11:37 -0800321#endif /* CONFIG_CIFS_STATS2 */
322
Jeff Layton80975312011-01-11 07:24:02 -0500323 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000324 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 "\n%d session %d share reconnects\n",
Steve French221601c2007-06-05 20:35:06 +0000326 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000328 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 "Total vfs operations: %d maximum at one time: %d\n",
Steve French221601c2007-06-05 20:35:06 +0000330 GlobalCurrentXid, GlobalMaxActiveXid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 i = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530333 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500334 list_for_each(tmp1, &cifs_tcp_ses_list) {
335 server = list_entry(tmp1, struct TCP_Server_Info,
336 tcp_ses_list);
337 list_for_each(tmp2, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000338 ses = list_entry(tmp2, struct cifs_ses,
Jeff Laytonf1987b42008-11-15 11:12:47 -0500339 smb_ses_list);
340 list_for_each(tmp3, &ses->tcon_list) {
341 tcon = list_entry(tmp3,
Steve French96daf2b2011-05-27 04:34:02 +0000342 struct cifs_tcon,
Jeff Laytonf1987b42008-11-15 11:12:47 -0500343 tcon_list);
344 i++;
345 seq_printf(m, "\n%d) %s", i, tcon->treeName);
346 if (tcon->need_reconnect)
347 seq_puts(m, "\tDISCONNECTED ");
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400348 seq_printf(m, "\nSMBs: %d",
349 atomic_read(&tcon->num_smbs_sent));
350 if (server->ops->print_stats)
351 server->ops->print_stats(m, tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500352 }
353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530355 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000357 seq_putc(m, '\n');
358 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000360
361static int cifs_stats_proc_open(struct inode *inode, struct file *file)
362{
363 return single_open(file, cifs_stats_proc_show, NULL);
364}
365
366static const struct file_operations cifs_stats_proc_fops = {
367 .owner = THIS_MODULE,
368 .open = cifs_stats_proc_open,
369 .read = seq_read,
370 .llseek = seq_lseek,
371 .release = single_release,
372 .write = cifs_stats_proc_write,
373};
Steve French90c81e02008-02-12 20:32:36 +0000374#endif /* STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376static struct proc_dir_entry *proc_fs_cifs;
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000377static const struct file_operations cifsFYI_proc_fops;
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000378static const struct file_operations cifs_lookup_cache_proc_fops;
379static const struct file_operations traceSMB_proc_fops;
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000380static const struct file_operations cifs_security_flags_proc_fops;
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000381static const struct file_operations cifs_linux_ext_proc_fops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383void
384cifs_proc_init(void)
385{
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -0700386 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 if (proc_fs_cifs == NULL)
388 return;
389
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000390 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392#ifdef CONFIG_CIFS_STATS
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000393 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
Steve French90c81e02008-02-12 20:32:36 +0000394#endif /* STATS */
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000395 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
396 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
Steve French99b1f5b2008-07-24 02:37:45 +0000397 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
398 &cifs_linux_ext_proc_fops);
Steve French99b1f5b2008-07-24 02:37:45 +0000399 proc_create("SecurityFlags", 0, proc_fs_cifs,
400 &cifs_security_flags_proc_fops);
401 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
402 &cifs_lookup_cache_proc_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
405void
406cifs_proc_clean(void)
407{
408 if (proc_fs_cifs == NULL)
409 return;
410
411 remove_proc_entry("DebugData", proc_fs_cifs);
412 remove_proc_entry("cifsFYI", proc_fs_cifs);
413 remove_proc_entry("traceSMB", proc_fs_cifs);
414#ifdef CONFIG_CIFS_STATS
415 remove_proc_entry("Stats", proc_fs_cifs);
416#endif
Steve French221601c2007-06-05 20:35:06 +0000417 remove_proc_entry("SecurityFlags", proc_fs_cifs);
Steve French221601c2007-06-05 20:35:06 +0000418 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
Steve French221601c2007-06-05 20:35:06 +0000419 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -0700420 remove_proc_entry("fs/cifs", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421}
422
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000423static int cifsFYI_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424{
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000425 seq_printf(m, "%d\n", cifsFYI);
426 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000428
429static int cifsFYI_proc_open(struct inode *inode, struct file *file)
430{
431 return single_open(file, cifsFYI_proc_show, NULL);
432}
433
434static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
435 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
437 char c;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300438 bool bv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 int rc;
440
441 rc = get_user(c, buffer);
442 if (rc)
443 return rc;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300444 if (strtobool(&c, &bv) == 0)
445 cifsFYI = bv;
Steve French221601c2007-06-05 20:35:06 +0000446 else if ((c > '1') && (c <= '9'))
Steve French1047abc2005-10-11 19:58:06 -0700447 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449 return count;
450}
451
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000452static const struct file_operations cifsFYI_proc_fops = {
453 .owner = THIS_MODULE,
454 .open = cifsFYI_proc_open,
455 .read = seq_read,
456 .llseek = seq_lseek,
457 .release = single_release,
458 .write = cifsFYI_proc_write,
459};
460
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000461static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000463 seq_printf(m, "%d\n", linuxExtEnabled);
464 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000466
467static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
468{
469 return single_open(file, cifs_linux_ext_proc_show, NULL);
470}
471
472static ssize_t cifs_linux_ext_proc_write(struct file *file,
473 const char __user *buffer, size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474{
Steve French221601c2007-06-05 20:35:06 +0000475 char c;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300476 bool bv;
Steve French221601c2007-06-05 20:35:06 +0000477 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Steve French221601c2007-06-05 20:35:06 +0000479 rc = get_user(c, buffer);
480 if (rc)
481 return rc;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300482
483 rc = strtobool(&c, &bv);
484 if (rc)
485 return rc;
486
487 linuxExtEnabled = bv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Steve French221601c2007-06-05 20:35:06 +0000489 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490}
491
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000492static const struct file_operations cifs_linux_ext_proc_fops = {
493 .owner = THIS_MODULE,
494 .open = cifs_linux_ext_proc_open,
495 .read = seq_read,
496 .llseek = seq_lseek,
497 .release = single_release,
498 .write = cifs_linux_ext_proc_write,
499};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000501static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502{
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000503 seq_printf(m, "%d\n", lookupCacheEnabled);
504 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000506
507static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
508{
509 return single_open(file, cifs_lookup_cache_proc_show, NULL);
510}
511
512static ssize_t cifs_lookup_cache_proc_write(struct file *file,
513 const char __user *buffer, size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514{
515 char c;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300516 bool bv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 int rc;
518
519 rc = get_user(c, buffer);
520 if (rc)
521 return rc;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300522
523 rc = strtobool(&c, &bv);
524 if (rc)
525 return rc;
526
527 lookupCacheEnabled = bv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
529 return count;
530}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000531
532static const struct file_operations cifs_lookup_cache_proc_fops = {
533 .owner = THIS_MODULE,
534 .open = cifs_lookup_cache_proc_open,
535 .read = seq_read,
536 .llseek = seq_lseek,
537 .release = single_release,
538 .write = cifs_lookup_cache_proc_write,
539};
540
541static int traceSMB_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542{
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000543 seq_printf(m, "%d\n", traceSMB);
544 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000546
547static int traceSMB_proc_open(struct inode *inode, struct file *file)
548{
549 return single_open(file, traceSMB_proc_show, NULL);
550}
551
552static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
553 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554{
555 char c;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300556 bool bv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 int rc;
558
559 rc = get_user(c, buffer);
560 if (rc)
561 return rc;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300562
563 rc = strtobool(&c, &bv);
564 if (rc)
565 return rc;
566
567 traceSMB = bv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569 return count;
570}
571
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000572static const struct file_operations traceSMB_proc_fops = {
573 .owner = THIS_MODULE,
574 .open = traceSMB_proc_open,
575 .read = seq_read,
576 .llseek = seq_lseek,
577 .release = single_release,
578 .write = traceSMB_proc_write,
579};
580
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000581static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582{
Jeff Layton04912d62010-04-24 07:57:45 -0400583 seq_printf(m, "0x%x\n", global_secflags);
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000584 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000586
587static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
588{
589 return single_open(file, cifs_security_flags_proc_show, NULL);
590}
591
Jeff Layton52dfb442013-05-26 07:01:02 -0400592/*
593 * Ensure that if someone sets a MUST flag, that we disable all other MAY
594 * flags except for the ones corresponding to the given MUST flag. If there are
595 * multiple MUST flags, then try to prefer more secure ones.
596 */
597static void
598cifs_security_flags_handle_must_flags(unsigned int *flags)
599{
600 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
601
602 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
603 *flags = CIFSSEC_MUST_KRB5;
604 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
605 *flags = CIFSSEC_MUST_NTLMSSP;
606 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
607 *flags = CIFSSEC_MUST_NTLMV2;
608 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
609 *flags = CIFSSEC_MUST_NTLM;
610 else if ((*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
611 *flags = CIFSSEC_MUST_LANMAN;
612 else if ((*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
613 *flags = CIFSSEC_MUST_PLNTXT;
614
615 *flags |= signflags;
616}
617
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000618static ssize_t cifs_security_flags_proc_write(struct file *file,
619 const char __user *buffer, size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
Jeff Layton7715dad2013-05-26 07:01:01 -0400621 int rc;
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000622 unsigned int flags;
623 char flags_string[12];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 char c;
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300625 bool bv;
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000626
Steve French221601c2007-06-05 20:35:06 +0000627 if ((count < 1) || (count > 11))
Steve French39798772006-05-31 22:40:51 +0000628 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000630 memset(flags_string, 0, 12);
Steve French39798772006-05-31 22:40:51 +0000631
Steve French221601c2007-06-05 20:35:06 +0000632 if (copy_from_user(flags_string, buffer, count))
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000633 return -EFAULT;
Steve French39798772006-05-31 22:40:51 +0000634
Steve French221601c2007-06-05 20:35:06 +0000635 if (count < 3) {
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000636 /* single char or single char followed by null */
637 c = flags_string[0];
Andy Shevchenko28e2aed2014-08-27 16:49:42 +0300638 if (strtobool(&c, &bv) == 0) {
639 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
Steve Frencha0136892007-10-04 20:05:09 +0000640 return count;
641 } else if (!isdigit(c)) {
Jeff Layton7715dad2013-05-26 07:01:01 -0400642 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
643 flags_string);
Steve Frencha0136892007-10-04 20:05:09 +0000644 return -EINVAL;
645 }
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000646 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Jeff Layton7715dad2013-05-26 07:01:01 -0400648 /* else we have a number */
649 rc = kstrtouint(flags_string, 0, &flags);
650 if (rc) {
651 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
652 flags_string);
653 return rc;
654 }
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000655
Joe Perchesf96637b2013-05-04 22:12:25 -0500656 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000657
Jeff Layton7715dad2013-05-26 07:01:01 -0400658 if (flags == 0) {
659 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000660 return -EINVAL;
661 }
662
Steve French221601c2007-06-05 20:35:06 +0000663 if (flags & ~CIFSSEC_MASK) {
Jeff Layton7715dad2013-05-26 07:01:01 -0400664 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
Joe Perchesf96637b2013-05-04 22:12:25 -0500665 flags & ~CIFSSEC_MASK);
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000666 return -EINVAL;
667 }
Jeff Layton7715dad2013-05-26 07:01:01 -0400668
Jeff Layton52dfb442013-05-26 07:01:02 -0400669 cifs_security_flags_handle_must_flags(&flags);
670
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000671 /* flags look ok - update the global security flags for cifs module */
Jeff Layton04912d62010-04-24 07:57:45 -0400672 global_secflags = flags;
673 if (global_secflags & CIFSSEC_MUST_SIGN) {
Steve French762e5ab2007-06-28 18:41:42 +0000674 /* requiring signing implies signing is allowed */
Jeff Layton04912d62010-04-24 07:57:45 -0400675 global_secflags |= CIFSSEC_MAY_SIGN;
Joe Perchesf96637b2013-05-04 22:12:25 -0500676 cifs_dbg(FYI, "packet signing now required\n");
Jeff Layton04912d62010-04-24 07:57:45 -0400677 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500678 cifs_dbg(FYI, "packet signing disabled\n");
Steve French762e5ab2007-06-28 18:41:42 +0000679 }
680 /* BB should we turn on MAY flags for other MUST options? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 return count;
682}
Alexey Dobriyanf984c7b2008-07-24 02:34:24 +0000683
684static const struct file_operations cifs_security_flags_proc_fops = {
685 .owner = THIS_MODULE,
686 .open = cifs_security_flags_proc_open,
687 .read = seq_read,
688 .llseek = seq_lseek,
689 .release = single_release,
690 .write = cifs_security_flags_proc_write,
691};
Steve French90c81e02008-02-12 20:32:36 +0000692#else
Steve Frenche086fce2008-02-18 04:03:58 +0000693inline void cifs_proc_init(void)
Steve French90c81e02008-02-12 20:32:36 +0000694{
695}
696
Steve Frenche086fce2008-02-18 04:03:58 +0000697inline void cifs_proc_clean(void)
Steve French90c81e02008-02-12 20:32:36 +0000698{
699}
700#endif /* PROC_FS */