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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
8a8798a5 | 41 | #include <keys/user-type.h> |
0e2bedaa | 42 | #include <net/ipv6.h> |
8830d7e0 SP |
43 | #include <linux/parser.h> |
44 | ||
1da177e4 LT |
45 | #include "cifspdu.h" |
46 | #include "cifsglob.h" | |
47 | #include "cifsproto.h" | |
48 | #include "cifs_unicode.h" | |
49 | #include "cifs_debug.h" | |
50 | #include "cifs_fs_sb.h" | |
51 | #include "ntlmssp.h" | |
52 | #include "nterr.h" | |
53 | #include "rfc1002pdu.h" | |
488f1d2d | 54 | #include "fscache.h" |
1da177e4 LT |
55 | |
56 | #define CIFS_PORT 445 | |
57 | #define RFC1001_PORT 139 | |
58 | ||
c74093b6 JL |
59 | /* SMB echo "timeout" -- FIXME: tunable? */ |
60 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
61 | ||
1da177e4 LT |
62 | extern mempool_t *cifs_req_poolp; |
63 | ||
2de970ff | 64 | /* FIXME: should these be tunable? */ |
9d002df4 | 65 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 66 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 67 | |
8830d7e0 SP |
68 | enum { |
69 | ||
70 | /* Mount options that take no arguments */ | |
71 | Opt_user_xattr, Opt_nouser_xattr, | |
72 | Opt_forceuid, Opt_noforceuid, | |
73 | Opt_noblocksend, Opt_noautotune, | |
74 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
75 | Opt_mapchars, Opt_nomapchars, Opt_sfu, | |
76 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
77 | Opt_noposixpaths, Opt_nounix, | |
78 | Opt_nocase, | |
79 | Opt_brl, Opt_nobrl, | |
80 | Opt_forcemandatorylock, Opt_setuids, | |
81 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, | |
82 | Opt_nohard, Opt_nosoft, | |
83 | Opt_nointr, Opt_intr, | |
84 | Opt_nostrictsync, Opt_strictsync, | |
85 | Opt_serverino, Opt_noserverino, | |
86 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
87 | Opt_acl, Opt_noacl, Opt_locallease, | |
88 | Opt_sign, Opt_seal, Opt_direct, | |
89 | Opt_strictcache, Opt_noac, | |
90 | Opt_fsc, Opt_mfsymlinks, | |
d8162558 | 91 | Opt_multiuser, Opt_sloppy, |
8830d7e0 SP |
92 | |
93 | /* Mount options which take numeric value */ | |
94 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
95 | Opt_cruid, Opt_gid, Opt_file_mode, | |
96 | Opt_dirmode, Opt_port, | |
97 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
98 | ||
99 | /* Mount options which take string value */ | |
100 | Opt_user, Opt_pass, Opt_ip, | |
101 | Opt_unc, Opt_domain, | |
102 | Opt_srcaddr, Opt_prefixpath, | |
103 | Opt_iocharset, Opt_sockopt, | |
104 | Opt_netbiosname, Opt_servern, | |
105 | Opt_ver, Opt_sec, | |
106 | ||
107 | /* Mount options to be ignored */ | |
108 | Opt_ignore, | |
109 | ||
110 | /* Options which could be blank */ | |
111 | Opt_blank_pass, | |
4fe9e963 SP |
112 | Opt_blank_user, |
113 | Opt_blank_ip, | |
8830d7e0 SP |
114 | |
115 | Opt_err | |
116 | }; | |
117 | ||
118 | static const match_table_t cifs_mount_option_tokens = { | |
119 | ||
120 | { Opt_user_xattr, "user_xattr" }, | |
121 | { Opt_nouser_xattr, "nouser_xattr" }, | |
122 | { Opt_forceuid, "forceuid" }, | |
123 | { Opt_noforceuid, "noforceuid" }, | |
124 | { Opt_noblocksend, "noblocksend" }, | |
125 | { Opt_noautotune, "noautotune" }, | |
126 | { Opt_hard, "hard" }, | |
127 | { Opt_soft, "soft" }, | |
128 | { Opt_perm, "perm" }, | |
129 | { Opt_noperm, "noperm" }, | |
130 | { Opt_mapchars, "mapchars" }, | |
131 | { Opt_nomapchars, "nomapchars" }, | |
132 | { Opt_sfu, "sfu" }, | |
133 | { Opt_nosfu, "nosfu" }, | |
134 | { Opt_nodfs, "nodfs" }, | |
135 | { Opt_posixpaths, "posixpaths" }, | |
136 | { Opt_noposixpaths, "noposixpaths" }, | |
137 | { Opt_nounix, "nounix" }, | |
138 | { Opt_nounix, "nolinux" }, | |
139 | { Opt_nocase, "nocase" }, | |
140 | { Opt_nocase, "ignorecase" }, | |
141 | { Opt_brl, "brl" }, | |
142 | { Opt_nobrl, "nobrl" }, | |
143 | { Opt_nobrl, "nolock" }, | |
144 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 145 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
146 | { Opt_setuids, "setuids" }, |
147 | { Opt_nosetuids, "nosetuids" }, | |
148 | { Opt_dynperm, "dynperm" }, | |
149 | { Opt_nodynperm, "nodynperm" }, | |
150 | { Opt_nohard, "nohard" }, | |
151 | { Opt_nosoft, "nosoft" }, | |
152 | { Opt_nointr, "nointr" }, | |
153 | { Opt_intr, "intr" }, | |
154 | { Opt_nostrictsync, "nostrictsync" }, | |
155 | { Opt_strictsync, "strictsync" }, | |
156 | { Opt_serverino, "serverino" }, | |
157 | { Opt_noserverino, "noserverino" }, | |
158 | { Opt_rwpidforward, "rwpidforward" }, | |
159 | { Opt_cifsacl, "cifsacl" }, | |
160 | { Opt_nocifsacl, "nocifsacl" }, | |
161 | { Opt_acl, "acl" }, | |
162 | { Opt_noacl, "noacl" }, | |
163 | { Opt_locallease, "locallease" }, | |
164 | { Opt_sign, "sign" }, | |
165 | { Opt_seal, "seal" }, | |
166 | { Opt_direct, "direct" }, | |
167 | { Opt_direct, "forceddirectio" }, | |
168 | { Opt_strictcache, "strictcache" }, | |
169 | { Opt_noac, "noac" }, | |
170 | { Opt_fsc, "fsc" }, | |
171 | { Opt_mfsymlinks, "mfsymlinks" }, | |
172 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 173 | { Opt_sloppy, "sloppy" }, |
8830d7e0 SP |
174 | |
175 | { Opt_backupuid, "backupuid=%s" }, | |
176 | { Opt_backupgid, "backupgid=%s" }, | |
177 | { Opt_uid, "uid=%s" }, | |
178 | { Opt_cruid, "cruid=%s" }, | |
179 | { Opt_gid, "gid=%s" }, | |
180 | { Opt_file_mode, "file_mode=%s" }, | |
181 | { Opt_dirmode, "dirmode=%s" }, | |
182 | { Opt_dirmode, "dir_mode=%s" }, | |
183 | { Opt_port, "port=%s" }, | |
184 | { Opt_rsize, "rsize=%s" }, | |
185 | { Opt_wsize, "wsize=%s" }, | |
186 | { Opt_actimeo, "actimeo=%s" }, | |
187 | ||
4fe9e963 SP |
188 | { Opt_blank_user, "user=" }, |
189 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
190 | { Opt_user, "user=%s" }, |
191 | { Opt_user, "username=%s" }, | |
192 | { Opt_blank_pass, "pass=" }, | |
193 | { Opt_pass, "pass=%s" }, | |
194 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
195 | { Opt_blank_ip, "ip=" }, |
196 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
197 | { Opt_ip, "ip=%s" }, |
198 | { Opt_ip, "addr=%s" }, | |
199 | { Opt_unc, "unc=%s" }, | |
200 | { Opt_unc, "target=%s" }, | |
201 | { Opt_unc, "path=%s" }, | |
202 | { Opt_domain, "dom=%s" }, | |
203 | { Opt_domain, "domain=%s" }, | |
204 | { Opt_domain, "workgroup=%s" }, | |
205 | { Opt_srcaddr, "srcaddr=%s" }, | |
206 | { Opt_prefixpath, "prefixpath=%s" }, | |
207 | { Opt_iocharset, "iocharset=%s" }, | |
208 | { Opt_sockopt, "sockopt=%s" }, | |
209 | { Opt_netbiosname, "netbiosname=%s" }, | |
210 | { Opt_servern, "servern=%s" }, | |
211 | { Opt_ver, "ver=%s" }, | |
212 | { Opt_ver, "vers=%s" }, | |
213 | { Opt_ver, "version=%s" }, | |
214 | { Opt_sec, "sec=%s" }, | |
215 | ||
216 | { Opt_ignore, "cred" }, | |
217 | { Opt_ignore, "credentials" }, | |
218 | { Opt_ignore, "guest" }, | |
219 | { Opt_ignore, "rw" }, | |
220 | { Opt_ignore, "ro" }, | |
221 | { Opt_ignore, "suid" }, | |
222 | { Opt_ignore, "nosuid" }, | |
223 | { Opt_ignore, "exec" }, | |
224 | { Opt_ignore, "noexec" }, | |
225 | { Opt_ignore, "nodev" }, | |
226 | { Opt_ignore, "noauto" }, | |
227 | { Opt_ignore, "dev" }, | |
228 | { Opt_ignore, "mand" }, | |
229 | { Opt_ignore, "nomand" }, | |
230 | { Opt_ignore, "_netdev" }, | |
231 | ||
232 | { Opt_err, NULL } | |
233 | }; | |
234 | ||
235 | enum { | |
236 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
237 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
238 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2i, | |
239 | Opt_sec_nontlm, Opt_sec_lanman, | |
240 | Opt_sec_none, | |
241 | ||
242 | Opt_sec_err | |
243 | }; | |
244 | ||
245 | static const match_table_t cifs_secflavor_tokens = { | |
246 | { Opt_sec_krb5, "krb5" }, | |
247 | { Opt_sec_krb5i, "krb5i" }, | |
248 | { Opt_sec_krb5p, "krb5p" }, | |
249 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
250 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
251 | { Opt_ntlm, "ntlm" }, | |
252 | { Opt_sec_ntlmi, "ntlmi" }, | |
253 | { Opt_sec_ntlmv2i, "ntlmv2i" }, | |
254 | { Opt_sec_nontlm, "nontlm" }, | |
255 | { Opt_sec_lanman, "lanman" }, | |
256 | { Opt_sec_none, "none" }, | |
257 | ||
258 | { Opt_sec_err, NULL } | |
259 | }; | |
260 | ||
a9f1b85e PS |
261 | static int ip_connect(struct TCP_Server_Info *server); |
262 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 263 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 264 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
265 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
266 | const char *devname); | |
1da177e4 | 267 | |
d5c5605c JL |
268 | /* |
269 | * cifs tcp session reconnection | |
270 | * | |
271 | * mark tcp session as reconnecting so temporarily locked | |
272 | * mark all smb sessions as reconnecting for tcp session | |
273 | * reconnect tcp session | |
274 | * wake up waiters on reconnection? - (not needed currently) | |
275 | */ | |
2cd646a2 | 276 | static int |
1da177e4 LT |
277 | cifs_reconnect(struct TCP_Server_Info *server) |
278 | { | |
279 | int rc = 0; | |
f1987b44 | 280 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
281 | struct cifs_ses *ses; |
282 | struct cifs_tcon *tcon; | |
fb8c4b14 | 283 | struct mid_q_entry *mid_entry; |
3c1105df | 284 | struct list_head retry_list; |
50c2f753 | 285 | |
1da177e4 | 286 | spin_lock(&GlobalMid_Lock); |
469ee614 | 287 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 288 | /* the demux thread will exit normally |
1da177e4 LT |
289 | next time through the loop */ |
290 | spin_unlock(&GlobalMid_Lock); | |
291 | return rc; | |
292 | } else | |
293 | server->tcpStatus = CifsNeedReconnect; | |
294 | spin_unlock(&GlobalMid_Lock); | |
295 | server->maxBuf = 0; | |
296 | ||
b6b38f70 | 297 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
298 | |
299 | /* before reconnecting the tcp session, mark the smb session (uid) | |
300 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 301 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 302 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 303 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 304 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
305 | ses->need_reconnect = true; |
306 | ses->ipc_tid = 0; | |
f1987b44 | 307 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 308 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 309 | tcon->need_reconnect = true; |
1da177e4 | 310 | } |
1da177e4 | 311 | } |
3f9bcca7 | 312 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 313 | |
1da177e4 | 314 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 315 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 316 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 317 | if (server->ssocket) { |
b6b38f70 JP |
318 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
319 | server->ssocket->flags); | |
91cf45f0 | 320 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 321 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 322 | server->ssocket->state, |
b6b38f70 | 323 | server->ssocket->flags); |
1da177e4 LT |
324 | sock_release(server->ssocket); |
325 | server->ssocket = NULL; | |
326 | } | |
5d0d2882 SP |
327 | server->sequence_number = 0; |
328 | server->session_estab = false; | |
21e73393 SP |
329 | kfree(server->session_key.response); |
330 | server->session_key.response = NULL; | |
331 | server->session_key.len = 0; | |
fda35943 | 332 | server->lstrp = jiffies; |
2b84a36c | 333 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 334 | |
2b84a36c | 335 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
336 | INIT_LIST_HEAD(&retry_list); |
337 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 338 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
339 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
340 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
341 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
342 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
343 | list_move(&mid_entry->qhead, &retry_list); |
344 | } | |
345 | spin_unlock(&GlobalMid_Lock); | |
346 | ||
347 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
348 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
349 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
350 | list_del_init(&mid_entry->qhead); |
351 | mid_entry->callback(mid_entry); | |
1da177e4 | 352 | } |
1da177e4 | 353 | |
7fdbaa1b | 354 | do { |
6c3d8909 | 355 | try_to_freeze(); |
a9f1b85e PS |
356 | |
357 | /* we should try only the port we connected to before */ | |
358 | rc = generic_ip_connect(server); | |
fb8c4b14 | 359 | if (rc) { |
b6b38f70 | 360 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 361 | msleep(3000); |
1da177e4 LT |
362 | } else { |
363 | atomic_inc(&tcpSesReconnectCount); | |
364 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 365 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 366 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 367 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 368 | } |
7fdbaa1b | 369 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 370 | |
1da177e4 LT |
371 | return rc; |
372 | } | |
373 | ||
fb8c4b14 | 374 | /* |
e4eb295d SF |
375 | return codes: |
376 | 0 not a transact2, or all data present | |
377 | >0 transact2 with that much data missing | |
378 | -EINVAL = invalid transact2 | |
379 | ||
380 | */ | |
d4e4854f | 381 | static int check2ndT2(char *buf) |
e4eb295d | 382 | { |
d4e4854f | 383 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; |
fb8c4b14 | 384 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 385 | int remaining; |
26ec2548 | 386 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 387 | |
fb8c4b14 | 388 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
389 | return 0; |
390 | ||
fb8c4b14 SF |
391 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
392 | /* check for parm and data offset going beyond end of smb */ | |
393 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 394 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
395 | return -EINVAL; |
396 | } | |
397 | ||
398 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
399 | ||
26ec2548 JL |
400 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
401 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 402 | |
c0c7b905 | 403 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 404 | return 0; |
c0c7b905 | 405 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
406 | cFYI(1, "total data %d smaller than data in frame %d", |
407 | total_data_size, data_in_this_rsp); | |
e4eb295d | 408 | return -EINVAL; |
e4eb295d | 409 | } |
c0c7b905 JL |
410 | |
411 | remaining = total_data_size - data_in_this_rsp; | |
412 | ||
413 | cFYI(1, "missing %d bytes from transact2, check next response", | |
414 | remaining); | |
c974befa | 415 | if (total_data_size > CIFSMaxBufSize) { |
c0c7b905 | 416 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
c974befa | 417 | total_data_size, CIFSMaxBufSize); |
c0c7b905 JL |
418 | return -EINVAL; |
419 | } | |
420 | return remaining; | |
e4eb295d SF |
421 | } |
422 | ||
d4e4854f | 423 | static int coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) |
e4eb295d | 424 | { |
d4e4854f PS |
425 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; |
426 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
f5fffcee JL |
427 | char *data_area_of_tgt; |
428 | char *data_area_of_src; | |
26ec2548 | 429 | int remaining; |
f5fffcee JL |
430 | unsigned int byte_count, total_in_tgt; |
431 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
e4eb295d | 432 | |
f5fffcee JL |
433 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); |
434 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
e4eb295d | 435 | |
f5fffcee JL |
436 | if (tgt_total_cnt != src_total_cnt) |
437 | cFYI(1, "total data count of primary and secondary t2 differ " | |
438 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); | |
e4eb295d | 439 | |
f5fffcee | 440 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d | 441 | |
f5fffcee | 442 | remaining = tgt_total_cnt - total_in_tgt; |
50c2f753 | 443 | |
f5fffcee JL |
444 | if (remaining < 0) { |
445 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " | |
446 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); | |
2a2047bc | 447 | return -EPROTO; |
f5fffcee | 448 | } |
e4eb295d | 449 | |
f5fffcee JL |
450 | if (remaining == 0) { |
451 | /* nothing to do, ignore */ | |
452 | cFYI(1, "no more data remains"); | |
e4eb295d | 453 | return 0; |
f5fffcee | 454 | } |
50c2f753 | 455 | |
f5fffcee JL |
456 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); |
457 | if (remaining < total_in_src) | |
b6b38f70 | 458 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
459 | |
460 | /* find end of first SMB data area */ | |
f5fffcee | 461 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 462 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d | 463 | |
f5fffcee JL |
464 | /* validate target area */ |
465 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
466 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
e4eb295d | 467 | |
f5fffcee | 468 | data_area_of_tgt += total_in_tgt; |
e4eb295d | 469 | |
f5fffcee | 470 | total_in_tgt += total_in_src; |
2a2047bc | 471 | /* is the result too big for the field? */ |
f5fffcee JL |
472 | if (total_in_tgt > USHRT_MAX) { |
473 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); | |
2a2047bc | 474 | return -EPROTO; |
f5fffcee JL |
475 | } |
476 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
2a2047bc JL |
477 | |
478 | /* fix up the BCC */ | |
d4e4854f | 479 | byte_count = get_bcc(target_hdr); |
f5fffcee | 480 | byte_count += total_in_src; |
2a2047bc | 481 | /* is the result too big for the field? */ |
f5fffcee JL |
482 | if (byte_count > USHRT_MAX) { |
483 | cFYI(1, "coalesced BCC too large (%u)", byte_count); | |
2a2047bc | 484 | return -EPROTO; |
f5fffcee | 485 | } |
d4e4854f | 486 | put_bcc(byte_count, target_hdr); |
e4eb295d | 487 | |
d4e4854f | 488 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); |
f5fffcee | 489 | byte_count += total_in_src; |
2a2047bc | 490 | /* don't allow buffer to overflow */ |
f5fffcee JL |
491 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
492 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); | |
2a2047bc | 493 | return -ENOBUFS; |
f5fffcee | 494 | } |
d4e4854f | 495 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 496 | |
f5fffcee JL |
497 | /* copy second buffer into end of first buffer */ |
498 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
2a2047bc | 499 | |
f5fffcee JL |
500 | if (remaining != total_in_src) { |
501 | /* more responses to go */ | |
502 | cFYI(1, "waiting for more secondary responses"); | |
e4eb295d | 503 | return 1; |
f5fffcee JL |
504 | } |
505 | ||
506 | /* we are done */ | |
507 | cFYI(1, "found the last secondary response"); | |
508 | return 0; | |
e4eb295d SF |
509 | } |
510 | ||
c74093b6 JL |
511 | static void |
512 | cifs_echo_request(struct work_struct *work) | |
513 | { | |
514 | int rc; | |
515 | struct TCP_Server_Info *server = container_of(work, | |
516 | struct TCP_Server_Info, echo.work); | |
517 | ||
247ec9b4 | 518 | /* |
195291e6 JL |
519 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
520 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
521 | * we got a response recently | |
247ec9b4 | 522 | */ |
195291e6 | 523 | if (server->maxBuf == 0 || |
247ec9b4 | 524 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
525 | goto requeue_echo; |
526 | ||
527 | rc = CIFSSMBEcho(server); | |
528 | if (rc) | |
529 | cFYI(1, "Unable to send echo request to server: %s", | |
530 | server->hostname); | |
531 | ||
532 | requeue_echo: | |
da472fc8 | 533 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
534 | } |
535 | ||
3d9c2472 | 536 | static bool |
2a37ef94 | 537 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 538 | { |
2a37ef94 JL |
539 | if (!server->bigbuf) { |
540 | server->bigbuf = (char *)cifs_buf_get(); | |
541 | if (!server->bigbuf) { | |
3d9c2472 PS |
542 | cERROR(1, "No memory for large SMB response"); |
543 | msleep(3000); | |
544 | /* retry will check if exiting */ | |
545 | return false; | |
546 | } | |
2a37ef94 | 547 | } else if (server->large_buf) { |
3d9c2472 | 548 | /* we are reusing a dirty large buf, clear its start */ |
d4e4854f | 549 | memset(server->bigbuf, 0, header_size()); |
3d9c2472 PS |
550 | } |
551 | ||
2a37ef94 JL |
552 | if (!server->smallbuf) { |
553 | server->smallbuf = (char *)cifs_small_buf_get(); | |
554 | if (!server->smallbuf) { | |
3d9c2472 PS |
555 | cERROR(1, "No memory for SMB response"); |
556 | msleep(1000); | |
557 | /* retry will check if exiting */ | |
558 | return false; | |
559 | } | |
560 | /* beginning of smb buffer is cleared in our buf_get */ | |
561 | } else { | |
562 | /* if existing small buf clear beginning */ | |
d4e4854f | 563 | memset(server->smallbuf, 0, header_size()); |
3d9c2472 PS |
564 | } |
565 | ||
3d9c2472 PS |
566 | return true; |
567 | } | |
568 | ||
ba749e6d JL |
569 | static bool |
570 | server_unresponsive(struct TCP_Server_Info *server) | |
571 | { | |
6dae51a5 PS |
572 | /* |
573 | * We need to wait 2 echo intervals to make sure we handle such | |
574 | * situations right: | |
575 | * 1s client sends a normal SMB request | |
576 | * 2s client gets a response | |
577 | * 30s echo workqueue job pops, and decides we got a response recently | |
578 | * and don't need to send another | |
579 | * ... | |
580 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
581 | * a response in >60s. | |
582 | */ | |
583 | if (server->tcpStatus == CifsGood && | |
584 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
585 | cERROR(1, "Server %s has not responded in %d seconds. " |
586 | "Reconnecting...", server->hostname, | |
6dae51a5 | 587 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
588 | cifs_reconnect(server); |
589 | wake_up(&server->response_q); | |
590 | return true; | |
591 | } | |
592 | ||
593 | return false; | |
594 | } | |
595 | ||
42c4dfc2 JL |
596 | /* |
597 | * kvec_array_init - clone a kvec array, and advance into it | |
598 | * @new: pointer to memory for cloned array | |
599 | * @iov: pointer to original array | |
600 | * @nr_segs: number of members in original array | |
601 | * @bytes: number of bytes to advance into the cloned array | |
602 | * | |
603 | * This function will copy the array provided in iov to a section of memory | |
604 | * and advance the specified number of bytes into the new array. It returns | |
605 | * the number of segments in the new array. "new" must be at least as big as | |
606 | * the original iov array. | |
607 | */ | |
608 | static unsigned int | |
609 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
610 | size_t bytes) | |
611 | { | |
612 | size_t base = 0; | |
613 | ||
614 | while (bytes || !iov->iov_len) { | |
615 | int copy = min(bytes, iov->iov_len); | |
616 | ||
617 | bytes -= copy; | |
618 | base += copy; | |
619 | if (iov->iov_len == base) { | |
620 | iov++; | |
621 | nr_segs--; | |
622 | base = 0; | |
623 | } | |
624 | } | |
625 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
626 | new->iov_base += base; | |
627 | new->iov_len -= base; | |
628 | return nr_segs; | |
629 | } | |
630 | ||
1041e3f9 JL |
631 | static struct kvec * |
632 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 633 | { |
1041e3f9 JL |
634 | struct kvec *new_iov; |
635 | ||
636 | if (server->iov && nr_segs <= server->nr_iov) | |
637 | return server->iov; | |
638 | ||
639 | /* not big enough -- allocate a new one and release the old */ | |
640 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
641 | if (new_iov) { | |
642 | kfree(server->iov); | |
643 | server->iov = new_iov; | |
644 | server->nr_iov = nr_segs; | |
645 | } | |
646 | return new_iov; | |
647 | } | |
648 | ||
e28bc5b1 JL |
649 | int |
650 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
651 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 652 | { |
a52c1eb7 JL |
653 | int length = 0; |
654 | int total_read; | |
42c4dfc2 | 655 | unsigned int segs; |
e831e6cf | 656 | struct msghdr smb_msg; |
42c4dfc2 JL |
657 | struct kvec *iov; |
658 | ||
1041e3f9 | 659 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
660 | if (!iov) |
661 | return -ENOMEM; | |
e7015fb1 | 662 | |
e831e6cf JL |
663 | smb_msg.msg_control = NULL; |
664 | smb_msg.msg_controllen = 0; | |
665 | ||
a52c1eb7 | 666 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
667 | try_to_freeze(); |
668 | ||
ba749e6d | 669 | if (server_unresponsive(server)) { |
a52c1eb7 | 670 | total_read = -EAGAIN; |
ba749e6d JL |
671 | break; |
672 | } | |
673 | ||
42c4dfc2 JL |
674 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
675 | ||
676 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
677 | iov, segs, to_read, 0); | |
e7015fb1 | 678 | |
e7015fb1 | 679 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 680 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
681 | break; |
682 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
683 | cifs_reconnect(server); | |
a52c1eb7 | 684 | total_read = -EAGAIN; |
e7015fb1 PS |
685 | break; |
686 | } else if (length == -ERESTARTSYS || | |
687 | length == -EAGAIN || | |
688 | length == -EINTR) { | |
689 | /* | |
690 | * Minimum sleep to prevent looping, allowing socket | |
691 | * to clear and app threads to set tcpStatus | |
692 | * CifsNeedReconnect if server hung. | |
693 | */ | |
694 | usleep_range(1000, 2000); | |
695 | length = 0; | |
a52c1eb7 | 696 | continue; |
e7015fb1 | 697 | } else if (length <= 0) { |
a52c1eb7 JL |
698 | cFYI(1, "Received no data or error: expecting %d " |
699 | "got %d", to_read, length); | |
e7015fb1 | 700 | cifs_reconnect(server); |
a52c1eb7 | 701 | total_read = -EAGAIN; |
e7015fb1 PS |
702 | break; |
703 | } | |
704 | } | |
a52c1eb7 | 705 | return total_read; |
e7015fb1 | 706 | } |
e7015fb1 | 707 | |
e28bc5b1 JL |
708 | int |
709 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
710 | unsigned int to_read) | |
42c4dfc2 JL |
711 | { |
712 | struct kvec iov; | |
713 | ||
714 | iov.iov_base = buf; | |
715 | iov.iov_len = to_read; | |
716 | ||
e28bc5b1 | 717 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
718 | } |
719 | ||
98bac62c | 720 | static bool |
fe11e4cc | 721 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 722 | { |
98bac62c PS |
723 | /* |
724 | * The first byte big endian of the length field, | |
725 | * is actually not part of the length but the type | |
726 | * with the most common, zero, as regular data. | |
727 | */ | |
fe11e4cc JL |
728 | switch (type) { |
729 | case RFC1002_SESSION_MESSAGE: | |
730 | /* Regular SMB response */ | |
731 | return true; | |
732 | case RFC1002_SESSION_KEEP_ALIVE: | |
733 | cFYI(1, "RFC 1002 session keep alive"); | |
734 | break; | |
735 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
736 | cFYI(1, "RFC 1002 positive session response"); | |
737 | break; | |
738 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
739 | /* |
740 | * We get this from Windows 98 instead of an error on | |
741 | * SMB negprot response. | |
742 | */ | |
fe11e4cc | 743 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
744 | /* give server a second to clean up */ |
745 | msleep(1000); | |
746 | /* | |
747 | * Always try 445 first on reconnect since we get NACK | |
748 | * on some if we ever connected to port 139 (the NACK | |
749 | * is since we do not begin with RFC1001 session | |
750 | * initialize frame). | |
751 | */ | |
fe11e4cc | 752 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
753 | cifs_reconnect(server); |
754 | wake_up(&server->response_q); | |
fe11e4cc JL |
755 | break; |
756 | default: | |
757 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 758 | cifs_reconnect(server); |
98bac62c PS |
759 | } |
760 | ||
fe11e4cc | 761 | return false; |
98bac62c PS |
762 | } |
763 | ||
ad69bae1 | 764 | static struct mid_q_entry * |
d4e4854f | 765 | find_mid(struct TCP_Server_Info *server, char *buffer) |
ad69bae1 | 766 | { |
d4e4854f | 767 | struct smb_hdr *buf = (struct smb_hdr *)buffer; |
ea1f4502 | 768 | struct mid_q_entry *mid; |
ad69bae1 PS |
769 | |
770 | spin_lock(&GlobalMid_Lock); | |
ea1f4502 JL |
771 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
772 | if (mid->mid == buf->Mid && | |
7c9421e1 PS |
773 | mid->mid_state == MID_REQUEST_SUBMITTED && |
774 | le16_to_cpu(mid->command) == buf->Command) { | |
ea1f4502 JL |
775 | spin_unlock(&GlobalMid_Lock); |
776 | return mid; | |
ad69bae1 | 777 | } |
ea1f4502 JL |
778 | } |
779 | spin_unlock(&GlobalMid_Lock); | |
780 | return NULL; | |
781 | } | |
782 | ||
e28bc5b1 JL |
783 | void |
784 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 785 | { |
ad69bae1 | 786 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 787 | mid->when_received = jiffies; |
ad69bae1 | 788 | #endif |
ea1f4502 JL |
789 | spin_lock(&GlobalMid_Lock); |
790 | if (!malformed) | |
7c9421e1 | 791 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 792 | else |
7c9421e1 | 793 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 794 | list_del_init(&mid->qhead); |
ad69bae1 | 795 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 796 | } |
ad69bae1 | 797 | |
c8054ebd JL |
798 | static void |
799 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 800 | char *buf, int malformed) |
ea1f4502 | 801 | { |
ffc00e27 JL |
802 | if (malformed == 0 && check2ndT2(buf) > 0) { |
803 | mid->multiRsp = true; | |
ea1f4502 JL |
804 | if (mid->resp_buf) { |
805 | /* merge response - fix up 1st*/ | |
ffc00e27 JL |
806 | malformed = coalesce_t2(buf, mid->resp_buf); |
807 | if (malformed > 0) | |
c8054ebd | 808 | return; |
ffc00e27 | 809 | |
ea1f4502 JL |
810 | /* All parts received or packet is malformed. */ |
811 | mid->multiEnd = true; | |
c8054ebd | 812 | return dequeue_mid(mid, malformed); |
ea1f4502 | 813 | } |
2a37ef94 | 814 | if (!server->large_buf) { |
ea1f4502 JL |
815 | /*FIXME: switch to already allocated largebuf?*/ |
816 | cERROR(1, "1st trans2 resp needs bigbuf"); | |
817 | } else { | |
818 | /* Have first buffer */ | |
819 | mid->resp_buf = buf; | |
7c9421e1 | 820 | mid->large_buf = true; |
2a37ef94 | 821 | server->bigbuf = NULL; |
ea1f4502 | 822 | } |
c8054ebd | 823 | return; |
ea1f4502 JL |
824 | } |
825 | mid->resp_buf = buf; | |
7c9421e1 | 826 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
827 | /* Was previous buf put in mpx struct for multi-rsp? */ |
828 | if (!mid->multiRsp) { | |
829 | /* smb buffer will be freed by user thread */ | |
830 | if (server->large_buf) | |
831 | server->bigbuf = NULL; | |
832 | else | |
833 | server->smallbuf = NULL; | |
834 | } | |
ffc00e27 | 835 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
836 | } |
837 | ||
762dfd10 PS |
838 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
839 | { | |
840 | int length; | |
841 | ||
842 | /* take it off the list, if it's not already */ | |
843 | spin_lock(&cifs_tcp_ses_lock); | |
844 | list_del_init(&server->tcp_ses_list); | |
845 | spin_unlock(&cifs_tcp_ses_lock); | |
846 | ||
847 | spin_lock(&GlobalMid_Lock); | |
848 | server->tcpStatus = CifsExiting; | |
849 | spin_unlock(&GlobalMid_Lock); | |
850 | wake_up_all(&server->response_q); | |
851 | ||
2d86dbc9 | 852 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 853 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
854 | if (server->credits <= 0) |
855 | server->credits = 1; | |
fc40f9cf | 856 | spin_unlock(&server->req_lock); |
762dfd10 PS |
857 | /* |
858 | * Although there should not be any requests blocked on this queue it | |
859 | * can not hurt to be paranoid and try to wake up requests that may | |
860 | * haven been blocked when more than 50 at time were on the wire to the | |
861 | * same server - they now will see the session is in exit state and get | |
862 | * out of SendReceive. | |
863 | */ | |
864 | wake_up_all(&server->request_q); | |
865 | /* give those requests time to exit */ | |
866 | msleep(125); | |
867 | ||
868 | if (server->ssocket) { | |
869 | sock_release(server->ssocket); | |
870 | server->ssocket = NULL; | |
871 | } | |
872 | ||
873 | if (!list_empty(&server->pending_mid_q)) { | |
874 | struct list_head dispose_list; | |
875 | struct mid_q_entry *mid_entry; | |
876 | struct list_head *tmp, *tmp2; | |
877 | ||
878 | INIT_LIST_HEAD(&dispose_list); | |
879 | spin_lock(&GlobalMid_Lock); | |
880 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
881 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
882 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
883 | mid_entry->mid_state = MID_SHUTDOWN; | |
762dfd10 PS |
884 | list_move(&mid_entry->qhead, &dispose_list); |
885 | } | |
886 | spin_unlock(&GlobalMid_Lock); | |
887 | ||
888 | /* now walk dispose list and issue callbacks */ | |
889 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
890 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 | 891 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
762dfd10 PS |
892 | list_del_init(&mid_entry->qhead); |
893 | mid_entry->callback(mid_entry); | |
894 | } | |
895 | /* 1/8th of sec is more than enough time for them to exit */ | |
896 | msleep(125); | |
897 | } | |
898 | ||
899 | if (!list_empty(&server->pending_mid_q)) { | |
900 | /* | |
901 | * mpx threads have not exited yet give them at least the smb | |
902 | * send timeout time for long ops. | |
903 | * | |
904 | * Due to delays on oplock break requests, we need to wait at | |
905 | * least 45 seconds before giving up on a request getting a | |
906 | * response and going ahead and killing cifsd. | |
907 | */ | |
908 | cFYI(1, "Wait for exit from demultiplex thread"); | |
909 | msleep(46000); | |
910 | /* | |
911 | * If threads still have not exited they are probably never | |
912 | * coming home not much else we can do but free the memory. | |
913 | */ | |
914 | } | |
915 | ||
916 | kfree(server->hostname); | |
1041e3f9 | 917 | kfree(server->iov); |
762dfd10 PS |
918 | kfree(server); |
919 | ||
920 | length = atomic_dec_return(&tcpSesAllocCount); | |
921 | if (length > 0) | |
922 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
923 | GFP_KERNEL); | |
924 | } | |
925 | ||
e9097ab4 JL |
926 | static int |
927 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
928 | { | |
929 | int length; | |
930 | char *buf = server->smallbuf; | |
d4e4854f | 931 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
932 | |
933 | /* make sure this will fit in a large buffer */ | |
d4e4854f | 934 | if (pdu_length > CIFSMaxBufSize + max_header_size() - 4) { |
e9097ab4 JL |
935 | cERROR(1, "SMB response too long (%u bytes)", |
936 | pdu_length); | |
937 | cifs_reconnect(server); | |
938 | wake_up(&server->response_q); | |
939 | return -EAGAIN; | |
940 | } | |
941 | ||
942 | /* switch to large buffer if too big for a small one */ | |
943 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
944 | server->large_buf = true; | |
d4e4854f | 945 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 946 | buf = server->bigbuf; |
e9097ab4 JL |
947 | } |
948 | ||
949 | /* now read the rest */ | |
d4e4854f PS |
950 | length = cifs_read_from_socket(server, buf + header_size() - 1, |
951 | pdu_length - header_size() + 1 + 4); | |
e9097ab4 JL |
952 | if (length < 0) |
953 | return length; | |
954 | server->total_read += length; | |
955 | ||
d4e4854f | 956 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
957 | |
958 | /* | |
959 | * We know that we received enough to get to the MID as we | |
960 | * checked the pdu_length earlier. Now check to see | |
961 | * if the rest of the header is OK. We borrow the length | |
962 | * var for the rest of the loop to avoid a new stack var. | |
963 | * | |
964 | * 48 bytes is enough to display the header and a little bit | |
965 | * into the payload for debugging purposes. | |
966 | */ | |
d4e4854f | 967 | length = checkSMB(buf, server->total_read); |
e9097ab4 JL |
968 | if (length != 0) |
969 | cifs_dump_mem("Bad SMB: ", buf, | |
970 | min_t(unsigned int, server->total_read, 48)); | |
971 | ||
ff4fa4a2 JL |
972 | if (!mid) |
973 | return length; | |
e9097ab4 | 974 | |
d4e4854f | 975 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 976 | return 0; |
e9097ab4 JL |
977 | } |
978 | ||
1da177e4 | 979 | static int |
7c97c200 | 980 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
981 | { |
982 | int length; | |
7c97c200 | 983 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
984 | unsigned int pdu_length; |
985 | char *buf = NULL; | |
1da177e4 LT |
986 | struct task_struct *task_to_wake = NULL; |
987 | struct mid_q_entry *mid_entry; | |
1da177e4 | 988 | |
1da177e4 | 989 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 990 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
991 | |
992 | length = atomic_inc_return(&tcpSesAllocCount); | |
993 | if (length > 1) | |
26f57364 SF |
994 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
995 | GFP_KERNEL); | |
1da177e4 | 996 | |
83144186 | 997 | set_freezable(); |
469ee614 | 998 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
999 | if (try_to_freeze()) |
1000 | continue; | |
b8643e1b | 1001 | |
2a37ef94 | 1002 | if (!allocate_buffers(server)) |
3d9c2472 | 1003 | continue; |
b8643e1b | 1004 | |
2a37ef94 | 1005 | server->large_buf = false; |
2a37ef94 | 1006 | buf = server->smallbuf; |
f01d5e14 | 1007 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 1008 | |
e28bc5b1 | 1009 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 1010 | if (length < 0) |
1da177e4 | 1011 | continue; |
2a37ef94 | 1012 | server->total_read = length; |
1da177e4 | 1013 | |
98bac62c PS |
1014 | /* |
1015 | * The right amount was read from socket - 4 bytes, | |
1016 | * so we can now interpret the length field. | |
1017 | */ | |
d4e4854f | 1018 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 1019 | |
fe11e4cc JL |
1020 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
1021 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 1022 | continue; |
e4eb295d | 1023 | |
89482a56 | 1024 | /* make sure we have enough to get to the MID */ |
d4e4854f | 1025 | if (pdu_length < header_size() - 1 - 4) { |
89482a56 JL |
1026 | cERROR(1, "SMB response too short (%u bytes)", |
1027 | pdu_length); | |
1028 | cifs_reconnect(server); | |
1029 | wake_up(&server->response_q); | |
1030 | continue; | |
e4eb295d | 1031 | } |
e7015fb1 | 1032 | |
89482a56 | 1033 | /* read down to the MID */ |
e28bc5b1 | 1034 | length = cifs_read_from_socket(server, buf + 4, |
d4e4854f | 1035 | header_size() - 1 - 4); |
89482a56 | 1036 | if (length < 0) |
e4eb295d | 1037 | continue; |
2a37ef94 | 1038 | server->total_read += length; |
1da177e4 | 1039 | |
d4e4854f | 1040 | mid_entry = find_mid(server, buf); |
50c2f753 | 1041 | |
44d22d84 JL |
1042 | if (!mid_entry || !mid_entry->receive) |
1043 | length = standard_receive3(server, mid_entry); | |
1044 | else | |
1045 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 1046 | |
e9097ab4 | 1047 | if (length < 0) |
fe11e4cc | 1048 | continue; |
1da177e4 | 1049 | |
d4e4854f | 1050 | if (server->large_buf) |
2a37ef94 | 1051 | buf = server->bigbuf; |
fda35943 | 1052 | |
fda35943 | 1053 | server->lstrp = jiffies; |
2b84a36c | 1054 | if (mid_entry != NULL) { |
2a37ef94 JL |
1055 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
1056 | mid_entry->callback(mid_entry); | |
d4e4854f | 1057 | } else if (!is_valid_oplock_break(buf, server)) { |
b6b38f70 | 1058 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 1059 | "NumMids %d", atomic_read(&midCount)); |
d4e4854f | 1060 | cifs_dump_mem("Received Data is: ", buf, header_size()); |
3979877e | 1061 | #ifdef CONFIG_CIFS_DEBUG2 |
d4e4854f | 1062 | cifs_dump_detail(buf); |
3979877e SF |
1063 | cifs_dump_mids(server); |
1064 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 1065 | |
e4eb295d SF |
1066 | } |
1067 | } /* end while !EXITING */ | |
1068 | ||
fd62cb7e | 1069 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
1070 | cifs_buf_release(server->bigbuf); |
1071 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
1072 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 1073 | |
b1c8d2b4 | 1074 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 1075 | clean_demultiplex_info(server); |
50c2f753 | 1076 | |
b1c8d2b4 JL |
1077 | /* if server->tsk was NULL then wait for a signal before exiting */ |
1078 | if (!task_to_wake) { | |
1079 | set_current_state(TASK_INTERRUPTIBLE); | |
1080 | while (!signal_pending(current)) { | |
1081 | schedule(); | |
1082 | set_current_state(TASK_INTERRUPTIBLE); | |
1083 | } | |
1084 | set_current_state(TASK_RUNNING); | |
1085 | } | |
1086 | ||
0468a2cf | 1087 | module_put_and_exit(0); |
1da177e4 LT |
1088 | } |
1089 | ||
c359cf3c JL |
1090 | /* extract the host portion of the UNC string */ |
1091 | static char * | |
1092 | extract_hostname(const char *unc) | |
1093 | { | |
1094 | const char *src; | |
1095 | char *dst, *delim; | |
1096 | unsigned int len; | |
1097 | ||
1098 | /* skip double chars at beginning of string */ | |
1099 | /* BB: check validity of these bytes? */ | |
1100 | src = unc + 2; | |
1101 | ||
1102 | /* delimiter between hostname and sharename is always '\\' now */ | |
1103 | delim = strchr(src, '\\'); | |
1104 | if (!delim) | |
1105 | return ERR_PTR(-EINVAL); | |
1106 | ||
1107 | len = delim - src; | |
1108 | dst = kmalloc((len + 1), GFP_KERNEL); | |
1109 | if (dst == NULL) | |
1110 | return ERR_PTR(-ENOMEM); | |
1111 | ||
1112 | memcpy(dst, src, len); | |
1113 | dst[len] = '\0'; | |
1114 | ||
1115 | return dst; | |
1116 | } | |
1117 | ||
8830d7e0 SP |
1118 | static int get_option_ul(substring_t args[], unsigned long *option) |
1119 | { | |
1120 | int rc; | |
1121 | char *string; | |
1122 | ||
1123 | string = match_strdup(args); | |
1124 | if (string == NULL) | |
1125 | return -ENOMEM; | |
bfa890a3 | 1126 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
1127 | kfree(string); |
1128 | ||
1129 | return rc; | |
1130 | } | |
1131 | ||
1132 | ||
1133 | static int cifs_parse_security_flavors(char *value, | |
1134 | struct smb_vol *vol) | |
1135 | { | |
1136 | ||
1137 | substring_t args[MAX_OPT_ARGS]; | |
1138 | ||
1139 | switch (match_token(value, cifs_secflavor_tokens, args)) { | |
1140 | case Opt_sec_krb5: | |
1141 | vol->secFlg |= CIFSSEC_MAY_KRB5; | |
1142 | break; | |
1143 | case Opt_sec_krb5i: | |
1144 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; | |
1145 | break; | |
1146 | case Opt_sec_krb5p: | |
1147 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ | |
1148 | cERROR(1, "Krb5 cifs privacy not supported"); | |
1149 | break; | |
1150 | case Opt_sec_ntlmssp: | |
1151 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
1152 | break; | |
1153 | case Opt_sec_ntlmsspi: | |
1154 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; | |
1155 | break; | |
1156 | case Opt_ntlm: | |
1157 | /* ntlm is default so can be turned off too */ | |
1158 | vol->secFlg |= CIFSSEC_MAY_NTLM; | |
1159 | break; | |
1160 | case Opt_sec_ntlmi: | |
1161 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; | |
1162 | break; | |
1163 | case Opt_sec_nontlm: | |
1164 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; | |
1165 | break; | |
1166 | case Opt_sec_ntlmv2i: | |
1167 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; | |
1168 | break; | |
1169 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1170 | case Opt_sec_lanman: | |
1171 | vol->secFlg |= CIFSSEC_MAY_LANMAN; | |
1172 | break; | |
1173 | #endif | |
1174 | case Opt_sec_none: | |
1175 | vol->nullauth = 1; | |
1176 | break; | |
1177 | default: | |
1178 | cERROR(1, "bad security option: %s", value); | |
1179 | return 1; | |
1180 | } | |
1181 | ||
1182 | return 0; | |
1183 | } | |
1184 | ||
1da177e4 | 1185 | static int |
b946845a | 1186 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1187 | struct smb_vol *vol) |
1da177e4 | 1188 | { |
8830d7e0 | 1189 | char *data, *end; |
957df453 | 1190 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1191 | unsigned int temp_len, i, j; |
1192 | char separator[2]; | |
9b9d6b24 JL |
1193 | short int override_uid = -1; |
1194 | short int override_gid = -1; | |
1195 | bool uid_specified = false; | |
1196 | bool gid_specified = false; | |
d8162558 JL |
1197 | bool sloppy = false; |
1198 | char *invalid = NULL; | |
88463999 | 1199 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1200 | char *string = NULL; |
1201 | char *tmp_end, *value; | |
1202 | char delim; | |
1da177e4 LT |
1203 | |
1204 | separator[0] = ','; | |
50c2f753 | 1205 | separator[1] = 0; |
8830d7e0 | 1206 | delim = separator[0]; |
1da177e4 | 1207 | |
88463999 JL |
1208 | /* |
1209 | * does not have to be perfect mapping since field is | |
1210 | * informational, only used for servers that do not support | |
1211 | * port 445 and it can be overridden at mount time | |
1212 | */ | |
1397f2ee JL |
1213 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1214 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1215 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1216 | ||
1397f2ee | 1217 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1218 | /* null target name indicates to use *SMBSERVR default called name |
1219 | if we end up sending RFC1001 session initialize */ | |
1220 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1221 | vol->cred_uid = current_uid(); |
1222 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1223 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1224 | |
1225 | /* default to only allowing write access to owner of the mount */ | |
1226 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1227 | |
1228 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1229 | /* default is always to request posix paths. */ |
1230 | vol->posix_paths = 1; | |
a0c9217f JL |
1231 | /* default to using server inode numbers where available */ |
1232 | vol->server_ino = 1; | |
ac67055e | 1233 | |
6d20e840 SJ |
1234 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1235 | ||
b946845a SF |
1236 | if (!mountdata) |
1237 | goto cifs_parse_mount_err; | |
1238 | ||
1239 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1240 | if (!mountdata_copy) | |
1241 | goto cifs_parse_mount_err; | |
1da177e4 | 1242 | |
b946845a | 1243 | options = mountdata_copy; |
4906e50b | 1244 | end = options + strlen(options); |
8830d7e0 | 1245 | |
50c2f753 | 1246 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1247 | if (options[4] != 0) { |
1da177e4 LT |
1248 | separator[0] = options[4]; |
1249 | options += 5; | |
1250 | } else { | |
b6b38f70 | 1251 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
1252 | } |
1253 | } | |
3d3ea8e6 SP |
1254 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1255 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1256 | |
1da177e4 | 1257 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1258 | substring_t args[MAX_OPT_ARGS]; |
1259 | unsigned long option; | |
1260 | int token; | |
1261 | ||
1da177e4 LT |
1262 | if (!*data) |
1263 | continue; | |
1da177e4 | 1264 | |
8830d7e0 SP |
1265 | token = match_token(data, cifs_mount_option_tokens, args); |
1266 | ||
1267 | switch (token) { | |
1268 | ||
1269 | /* Ingnore the following */ | |
1270 | case Opt_ignore: | |
1271 | break; | |
1272 | ||
1273 | /* Boolean values */ | |
1274 | case Opt_user_xattr: | |
1da177e4 | 1275 | vol->no_xattr = 0; |
8830d7e0 SP |
1276 | break; |
1277 | case Opt_nouser_xattr: | |
1da177e4 | 1278 | vol->no_xattr = 1; |
8830d7e0 SP |
1279 | break; |
1280 | case Opt_forceuid: | |
9b9d6b24 | 1281 | override_uid = 1; |
8830d7e0 SP |
1282 | break; |
1283 | case Opt_noforceuid: | |
9b9d6b24 | 1284 | override_uid = 0; |
8830d7e0 SP |
1285 | break; |
1286 | case Opt_noblocksend: | |
edf1ae40 | 1287 | vol->noblocksnd = 1; |
8830d7e0 SP |
1288 | break; |
1289 | case Opt_noautotune: | |
edf1ae40 | 1290 | vol->noautotune = 1; |
8830d7e0 SP |
1291 | break; |
1292 | case Opt_hard: | |
1da177e4 | 1293 | vol->retry = 1; |
8830d7e0 SP |
1294 | break; |
1295 | case Opt_soft: | |
1da177e4 | 1296 | vol->retry = 0; |
8830d7e0 SP |
1297 | break; |
1298 | case Opt_perm: | |
1da177e4 | 1299 | vol->noperm = 0; |
8830d7e0 SP |
1300 | break; |
1301 | case Opt_noperm: | |
1da177e4 | 1302 | vol->noperm = 1; |
8830d7e0 SP |
1303 | break; |
1304 | case Opt_mapchars: | |
6a0b4824 | 1305 | vol->remap = 1; |
8830d7e0 SP |
1306 | break; |
1307 | case Opt_nomapchars: | |
6a0b4824 | 1308 | vol->remap = 0; |
8830d7e0 SP |
1309 | break; |
1310 | case Opt_sfu: | |
50c2f753 | 1311 | vol->sfu_emul = 1; |
8830d7e0 SP |
1312 | break; |
1313 | case Opt_nosfu: | |
50c2f753 | 1314 | vol->sfu_emul = 0; |
8830d7e0 SP |
1315 | break; |
1316 | case Opt_nodfs: | |
2c1b8615 | 1317 | vol->nodfs = 1; |
8830d7e0 SP |
1318 | break; |
1319 | case Opt_posixpaths: | |
ac67055e | 1320 | vol->posix_paths = 1; |
8830d7e0 SP |
1321 | break; |
1322 | case Opt_noposixpaths: | |
ac67055e | 1323 | vol->posix_paths = 0; |
8830d7e0 SP |
1324 | break; |
1325 | case Opt_nounix: | |
c18c842b | 1326 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1327 | break; |
1328 | case Opt_nocase: | |
50c2f753 | 1329 | vol->nocase = 1; |
8830d7e0 SP |
1330 | break; |
1331 | case Opt_brl: | |
c46fa8ac | 1332 | vol->nobrl = 0; |
8830d7e0 SP |
1333 | break; |
1334 | case Opt_nobrl: | |
c46fa8ac | 1335 | vol->nobrl = 1; |
5cfdddcf PS |
1336 | /* |
1337 | * turn off mandatory locking in mode | |
8830d7e0 | 1338 | * if remote locking is turned off since the |
5cfdddcf PS |
1339 | * local vfs will do advisory |
1340 | */ | |
50c2f753 SF |
1341 | if (vol->file_mode == |
1342 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1343 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1344 | break; |
1345 | case Opt_forcemandatorylock: | |
13a6e42a | 1346 | vol->mand_lock = 1; |
8830d7e0 SP |
1347 | break; |
1348 | case Opt_setuids: | |
1da177e4 | 1349 | vol->setuids = 1; |
8830d7e0 SP |
1350 | break; |
1351 | case Opt_nosetuids: | |
1da177e4 | 1352 | vol->setuids = 0; |
8830d7e0 SP |
1353 | break; |
1354 | case Opt_dynperm: | |
d0a9c078 | 1355 | vol->dynperm = true; |
8830d7e0 SP |
1356 | break; |
1357 | case Opt_nodynperm: | |
d0a9c078 | 1358 | vol->dynperm = false; |
8830d7e0 SP |
1359 | break; |
1360 | case Opt_nohard: | |
1da177e4 | 1361 | vol->retry = 0; |
8830d7e0 SP |
1362 | break; |
1363 | case Opt_nosoft: | |
1da177e4 | 1364 | vol->retry = 1; |
8830d7e0 SP |
1365 | break; |
1366 | case Opt_nointr: | |
1da177e4 | 1367 | vol->intr = 0; |
8830d7e0 SP |
1368 | break; |
1369 | case Opt_intr: | |
1da177e4 | 1370 | vol->intr = 1; |
8830d7e0 SP |
1371 | break; |
1372 | case Opt_nostrictsync: | |
be652445 | 1373 | vol->nostrictsync = 1; |
8830d7e0 SP |
1374 | break; |
1375 | case Opt_strictsync: | |
be652445 | 1376 | vol->nostrictsync = 0; |
8830d7e0 SP |
1377 | break; |
1378 | case Opt_serverino: | |
1da177e4 | 1379 | vol->server_ino = 1; |
8830d7e0 SP |
1380 | break; |
1381 | case Opt_noserverino: | |
1da177e4 | 1382 | vol->server_ino = 0; |
8830d7e0 SP |
1383 | break; |
1384 | case Opt_rwpidforward: | |
d4ffff1f | 1385 | vol->rwpidforward = 1; |
8830d7e0 SP |
1386 | break; |
1387 | case Opt_cifsacl: | |
0a4b92c0 | 1388 | vol->cifs_acl = 1; |
8830d7e0 SP |
1389 | break; |
1390 | case Opt_nocifsacl: | |
0a4b92c0 | 1391 | vol->cifs_acl = 0; |
8830d7e0 SP |
1392 | break; |
1393 | case Opt_acl: | |
1da177e4 | 1394 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1395 | break; |
1396 | case Opt_noacl: | |
1da177e4 | 1397 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1398 | break; |
1399 | case Opt_locallease: | |
84210e91 | 1400 | vol->local_lease = 1; |
8830d7e0 SP |
1401 | break; |
1402 | case Opt_sign: | |
750d1151 | 1403 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
8830d7e0 SP |
1404 | break; |
1405 | case Opt_seal: | |
95b1cb90 | 1406 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1407 | * is a per tree connection (mount) not a per socket |
1408 | * or per-smb connection option in the protocol | |
1409 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1410 | */ | |
95b1cb90 | 1411 | vol->seal = 1; |
8830d7e0 SP |
1412 | break; |
1413 | case Opt_direct: | |
1da177e4 | 1414 | vol->direct_io = 1; |
8830d7e0 SP |
1415 | break; |
1416 | case Opt_strictcache: | |
d39454ff | 1417 | vol->strict_io = 1; |
8830d7e0 SP |
1418 | break; |
1419 | case Opt_noac: | |
50c2f753 SF |
1420 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1421 | "supported. Instead set " | |
1422 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1423 | break; |
1424 | case Opt_fsc: | |
607a569d | 1425 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1426 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1427 | "kernel config option set"); |
b946845a | 1428 | goto cifs_parse_mount_err; |
607a569d | 1429 | #endif |
fa1df75d | 1430 | vol->fsc = true; |
8830d7e0 SP |
1431 | break; |
1432 | case Opt_mfsymlinks: | |
736a3320 | 1433 | vol->mfsymlinks = true; |
8830d7e0 SP |
1434 | break; |
1435 | case Opt_multiuser: | |
0eb8a132 | 1436 | vol->multiuser = true; |
8830d7e0 | 1437 | break; |
d8162558 JL |
1438 | case Opt_sloppy: |
1439 | sloppy = true; | |
1440 | break; | |
8830d7e0 SP |
1441 | |
1442 | /* Numeric Values */ | |
1443 | case Opt_backupuid: | |
1444 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1445 | cERROR(1, "%s: Invalid backupuid value", |
1446 | __func__); | |
1447 | goto cifs_parse_mount_err; | |
1448 | } | |
8830d7e0 | 1449 | vol->backupuid = option; |
3d3ea8e6 | 1450 | vol->backupuid_specified = true; |
8830d7e0 SP |
1451 | break; |
1452 | case Opt_backupgid: | |
1453 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1454 | cERROR(1, "%s: Invalid backupgid value", |
1455 | __func__); | |
1456 | goto cifs_parse_mount_err; | |
1457 | } | |
8830d7e0 | 1458 | vol->backupgid = option; |
3d3ea8e6 | 1459 | vol->backupgid_specified = true; |
8830d7e0 SP |
1460 | break; |
1461 | case Opt_uid: | |
1462 | if (get_option_ul(args, &option)) { | |
1463 | cERROR(1, "%s: Invalid uid value", | |
1464 | __func__); | |
1465 | goto cifs_parse_mount_err; | |
1466 | } | |
1467 | vol->linux_uid = option; | |
1468 | uid_specified = true; | |
1469 | break; | |
1470 | case Opt_cruid: | |
1471 | if (get_option_ul(args, &option)) { | |
1472 | cERROR(1, "%s: Invalid cruid value", | |
1473 | __func__); | |
1474 | goto cifs_parse_mount_err; | |
1475 | } | |
1476 | vol->cred_uid = option; | |
1477 | break; | |
1478 | case Opt_gid: | |
1479 | if (get_option_ul(args, &option)) { | |
1480 | cERROR(1, "%s: Invalid gid value", | |
1481 | __func__); | |
1482 | goto cifs_parse_mount_err; | |
1483 | } | |
1484 | vol->linux_gid = option; | |
1485 | gid_specified = true; | |
1486 | break; | |
1487 | case Opt_file_mode: | |
1488 | if (get_option_ul(args, &option)) { | |
1489 | cERROR(1, "%s: Invalid file_mode value", | |
1490 | __func__); | |
1491 | goto cifs_parse_mount_err; | |
1492 | } | |
1493 | vol->file_mode = option; | |
1494 | break; | |
1495 | case Opt_dirmode: | |
1496 | if (get_option_ul(args, &option)) { | |
1497 | cERROR(1, "%s: Invalid dir_mode value", | |
1498 | __func__); | |
1499 | goto cifs_parse_mount_err; | |
1500 | } | |
1501 | vol->dir_mode = option; | |
1502 | break; | |
1503 | case Opt_port: | |
1504 | if (get_option_ul(args, &option)) { | |
1505 | cERROR(1, "%s: Invalid port value", | |
1506 | __func__); | |
1507 | goto cifs_parse_mount_err; | |
1508 | } | |
1509 | vol->port = option; | |
1510 | break; | |
1511 | case Opt_rsize: | |
1512 | if (get_option_ul(args, &option)) { | |
1513 | cERROR(1, "%s: Invalid rsize value", | |
1514 | __func__); | |
b946845a | 1515 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1516 | } |
1517 | vol->rsize = option; | |
1518 | break; | |
1519 | case Opt_wsize: | |
1520 | if (get_option_ul(args, &option)) { | |
1521 | cERROR(1, "%s: Invalid wsize value", | |
1522 | __func__); | |
1523 | goto cifs_parse_mount_err; | |
1524 | } | |
1525 | vol->wsize = option; | |
1526 | break; | |
1527 | case Opt_actimeo: | |
1528 | if (get_option_ul(args, &option)) { | |
1529 | cERROR(1, "%s: Invalid actimeo value", | |
1530 | __func__); | |
1531 | goto cifs_parse_mount_err; | |
1532 | } | |
1533 | vol->actimeo = HZ * option; | |
1534 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1535 | cERROR(1, "CIFS: attribute cache" | |
1536 | "timeout too large"); | |
1537 | goto cifs_parse_mount_err; | |
1538 | } | |
1539 | break; | |
1540 | ||
1541 | /* String Arguments */ | |
1542 | ||
4fe9e963 SP |
1543 | case Opt_blank_user: |
1544 | /* null user, ie. anonymous authentication */ | |
1545 | vol->nullauth = 1; | |
1546 | vol->username = NULL; | |
1547 | break; | |
8830d7e0 SP |
1548 | case Opt_user: |
1549 | string = match_strdup(args); | |
1550 | if (string == NULL) | |
1551 | goto out_nomem; | |
1552 | ||
4fe9e963 | 1553 | if (strnlen(string, MAX_USERNAME_SIZE) > |
8830d7e0 SP |
1554 | MAX_USERNAME_SIZE) { |
1555 | printk(KERN_WARNING "CIFS: username too long\n"); | |
1556 | goto cifs_parse_mount_err; | |
1557 | } | |
1558 | vol->username = kstrdup(string, GFP_KERNEL); | |
1559 | if (!vol->username) { | |
1560 | printk(KERN_WARNING "CIFS: no memory " | |
1561 | "for username\n"); | |
1562 | goto cifs_parse_mount_err; | |
1563 | } | |
1564 | break; | |
1565 | case Opt_blank_pass: | |
1566 | vol->password = NULL; | |
1567 | break; | |
1568 | case Opt_pass: | |
1569 | /* passwords have to be handled differently | |
1570 | * to allow the character used for deliminator | |
1571 | * to be passed within them | |
1572 | */ | |
1573 | ||
1574 | /* Obtain the value string */ | |
1575 | value = strchr(data, '='); | |
10238074 | 1576 | value++; |
8830d7e0 SP |
1577 | |
1578 | /* Set tmp_end to end of the string */ | |
1579 | tmp_end = (char *) value + strlen(value); | |
1580 | ||
1581 | /* Check if following character is the deliminator | |
1582 | * If yes, we have encountered a double deliminator | |
1583 | * reset the NULL character to the deliminator | |
1584 | */ | |
1585 | if (tmp_end < end && tmp_end[1] == delim) | |
1586 | tmp_end[0] = delim; | |
1587 | ||
1588 | /* Keep iterating until we get to a single deliminator | |
1589 | * OR the end | |
1590 | */ | |
1591 | while ((tmp_end = strchr(tmp_end, delim)) != NULL && | |
1592 | (tmp_end[1] == delim)) { | |
1593 | tmp_end = (char *) &tmp_end[2]; | |
1594 | } | |
1595 | ||
1596 | /* Reset var options to point to next element */ | |
1597 | if (tmp_end) { | |
1598 | tmp_end[0] = '\0'; | |
1599 | options = (char *) &tmp_end[1]; | |
1600 | } else | |
1601 | /* Reached the end of the mount option string */ | |
1602 | options = end; | |
1603 | ||
1604 | /* Now build new password string */ | |
1605 | temp_len = strlen(value); | |
1606 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1607 | if (vol->password == NULL) { | |
1608 | printk(KERN_WARNING "CIFS: no memory " | |
1609 | "for password\n"); | |
1610 | goto cifs_parse_mount_err; | |
1611 | } | |
1612 | ||
1613 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1614 | vol->password[j] = value[i]; | |
1615 | if ((value[i] == delim) && | |
1616 | value[i+1] == delim) | |
1617 | /* skip the second deliminator */ | |
1618 | i++; | |
1619 | } | |
1620 | vol->password[j] = '\0'; | |
1621 | break; | |
4fe9e963 SP |
1622 | case Opt_blank_ip: |
1623 | vol->UNCip = NULL; | |
1624 | break; | |
8830d7e0 SP |
1625 | case Opt_ip: |
1626 | string = match_strdup(args); | |
1627 | if (string == NULL) | |
1628 | goto out_nomem; | |
1629 | ||
4fe9e963 | 1630 | if (strnlen(string, INET6_ADDRSTRLEN) > |
8830d7e0 SP |
1631 | INET6_ADDRSTRLEN) { |
1632 | printk(KERN_WARNING "CIFS: ip address " | |
1633 | "too long\n"); | |
1634 | goto cifs_parse_mount_err; | |
1635 | } | |
1636 | vol->UNCip = kstrdup(string, GFP_KERNEL); | |
1637 | if (!vol->UNCip) { | |
1638 | printk(KERN_WARNING "CIFS: no memory " | |
1639 | "for UNC IP\n"); | |
1640 | goto cifs_parse_mount_err; | |
1641 | } | |
1642 | break; | |
1643 | case Opt_unc: | |
1644 | string = match_strdup(args); | |
1645 | if (string == NULL) | |
1646 | goto out_nomem; | |
1647 | ||
8830d7e0 SP |
1648 | temp_len = strnlen(string, 300); |
1649 | if (temp_len == 300) { | |
1650 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1651 | goto cifs_parse_mount_err; | |
1652 | } | |
1653 | ||
e4b41fb9 SP |
1654 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
1655 | if (vol->UNC == NULL) { | |
1656 | printk(KERN_WARNING "CIFS: no memory for UNC\n"); | |
1657 | goto cifs_parse_mount_err; | |
1658 | } | |
1659 | strcpy(vol->UNC, string); | |
1660 | ||
8830d7e0 | 1661 | if (strncmp(string, "//", 2) == 0) { |
1da177e4 LT |
1662 | vol->UNC[0] = '\\'; |
1663 | vol->UNC[1] = '\\'; | |
8830d7e0 | 1664 | } else if (strncmp(string, "\\\\", 2) != 0) { |
50c2f753 | 1665 | printk(KERN_WARNING "CIFS: UNC Path does not " |
8830d7e0 | 1666 | "begin with // or \\\\\n"); |
b946845a | 1667 | goto cifs_parse_mount_err; |
1da177e4 | 1668 | } |
8830d7e0 | 1669 | |
8830d7e0 SP |
1670 | break; |
1671 | case Opt_domain: | |
1672 | string = match_strdup(args); | |
1673 | if (string == NULL) | |
1674 | goto out_nomem; | |
1675 | ||
4fe9e963 | 1676 | if (strnlen(string, 256) == 256) { |
8830d7e0 SP |
1677 | printk(KERN_WARNING "CIFS: domain name too" |
1678 | " long\n"); | |
1679 | goto cifs_parse_mount_err; | |
1680 | } | |
1681 | ||
1682 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1683 | if (!vol->domainname) { | |
1684 | printk(KERN_WARNING "CIFS: no memory " | |
1685 | "for domainname\n"); | |
1686 | goto cifs_parse_mount_err; | |
1687 | } | |
1688 | cFYI(1, "Domain name set"); | |
1689 | break; | |
1690 | case Opt_srcaddr: | |
1691 | string = match_strdup(args); | |
1692 | if (string == NULL) | |
1693 | goto out_nomem; | |
1694 | ||
4fe9e963 | 1695 | if (!cifs_convert_address( |
8830d7e0 SP |
1696 | (struct sockaddr *)&vol->srcaddr, |
1697 | string, strlen(string))) { | |
1698 | printk(KERN_WARNING "CIFS: Could not parse" | |
1699 | " srcaddr: %s\n", string); | |
1700 | goto cifs_parse_mount_err; | |
1701 | } | |
1702 | break; | |
1703 | case Opt_prefixpath: | |
1704 | string = match_strdup(args); | |
1705 | if (string == NULL) | |
1706 | goto out_nomem; | |
1707 | ||
8830d7e0 SP |
1708 | temp_len = strnlen(string, 1024); |
1709 | if (string[0] != '/') | |
1710 | temp_len++; /* missing leading slash */ | |
1711 | if (temp_len > 1024) { | |
1712 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1713 | goto cifs_parse_mount_err; | |
1714 | } | |
1715 | ||
1716 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); | |
1717 | if (vol->prepath == NULL) { | |
1718 | printk(KERN_WARNING "CIFS: no memory " | |
1719 | "for path prefix\n"); | |
1720 | goto cifs_parse_mount_err; | |
1721 | } | |
1722 | ||
1723 | if (string[0] != '/') { | |
1724 | vol->prepath[0] = '/'; | |
1725 | strcpy(vol->prepath+1, string); | |
1726 | } else | |
1727 | strcpy(vol->prepath, string); | |
1728 | ||
1729 | break; | |
1730 | case Opt_iocharset: | |
1731 | string = match_strdup(args); | |
1732 | if (string == NULL) | |
1733 | goto out_nomem; | |
1734 | ||
4fe9e963 | 1735 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1736 | printk(KERN_WARNING "CIFS: iocharset name " |
1737 | "too long.\n"); | |
1738 | goto cifs_parse_mount_err; | |
1739 | } | |
1740 | ||
1741 | if (strnicmp(string, "default", 7) != 0) { | |
1742 | vol->iocharset = kstrdup(string, | |
1743 | GFP_KERNEL); | |
1744 | if (!vol->iocharset) { | |
1745 | printk(KERN_WARNING "CIFS: no memory" | |
1746 | "for charset\n"); | |
1747 | goto cifs_parse_mount_err; | |
1748 | } | |
1749 | } | |
1750 | /* if iocharset not set then load_nls_default | |
1751 | * is used by caller | |
1752 | */ | |
1753 | cFYI(1, "iocharset set to %s", string); | |
1754 | break; | |
1755 | case Opt_sockopt: | |
1756 | string = match_strdup(args); | |
1757 | if (string == NULL) | |
1758 | goto out_nomem; | |
1759 | ||
8830d7e0 SP |
1760 | if (strnicmp(string, "TCP_NODELAY", 11) == 0) |
1761 | vol->sockopt_tcp_nodelay = 1; | |
1762 | break; | |
1763 | case Opt_netbiosname: | |
1764 | string = match_strdup(args); | |
1765 | if (string == NULL) | |
1766 | goto out_nomem; | |
1767 | ||
8830d7e0 SP |
1768 | memset(vol->source_rfc1001_name, 0x20, |
1769 | RFC1001_NAME_LEN); | |
1770 | /* | |
1771 | * FIXME: are there cases in which a comma can | |
1772 | * be valid in workstation netbios name (and | |
1773 | * need special handling)? | |
1774 | */ | |
1775 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1776 | /* don't ucase netbiosname for user */ | |
1777 | if (string[i] == 0) | |
1778 | break; | |
1779 | vol->source_rfc1001_name[i] = string[i]; | |
1780 | } | |
1781 | /* The string has 16th byte zero still from | |
1782 | * set at top of the function | |
1783 | */ | |
1784 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1785 | printk(KERN_WARNING "CIFS: netbiosname" | |
1786 | " longer than 15 truncated.\n"); | |
1787 | ||
1788 | break; | |
1789 | case Opt_servern: | |
1790 | /* servernetbiosname specified override *SMBSERVER */ | |
1791 | string = match_strdup(args); | |
1792 | if (string == NULL) | |
1793 | goto out_nomem; | |
1794 | ||
8830d7e0 SP |
1795 | /* last byte, type, is 0x20 for servr type */ |
1796 | memset(vol->target_rfc1001_name, 0x20, | |
1797 | RFC1001_NAME_LEN_WITH_NULL); | |
1798 | ||
1799 | /* BB are there cases in which a comma can be | |
1800 | valid in this workstation netbios name | |
1801 | (and need special handling)? */ | |
1802 | ||
1803 | /* user or mount helper must uppercase the | |
1804 | netbios name */ | |
1805 | for (i = 0; i < 15; i++) { | |
1806 | if (string[i] == 0) | |
1807 | break; | |
1808 | vol->target_rfc1001_name[i] = string[i]; | |
1809 | } | |
1810 | /* The string has 16th byte zero still from | |
1811 | set at top of the function */ | |
1812 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1813 | printk(KERN_WARNING "CIFS: server net" | |
1814 | "biosname longer than 15 truncated.\n"); | |
1815 | break; | |
1816 | case Opt_ver: | |
1817 | string = match_strdup(args); | |
1818 | if (string == NULL) | |
1819 | goto out_nomem; | |
1820 | ||
8830d7e0 SP |
1821 | if (strnicmp(string, "cifs", 4) == 0 || |
1822 | strnicmp(string, "1", 1) == 0) { | |
1823 | /* This is the default */ | |
1824 | break; | |
1825 | } | |
1826 | /* For all other value, error */ | |
1827 | printk(KERN_WARNING "CIFS: Invalid version" | |
1828 | " specified\n"); | |
b946845a | 1829 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1830 | case Opt_sec: |
1831 | string = match_strdup(args); | |
1832 | if (string == NULL) | |
1833 | goto out_nomem; | |
1834 | ||
8830d7e0 SP |
1835 | if (cifs_parse_security_flavors(string, vol) != 0) |
1836 | goto cifs_parse_mount_err; | |
1837 | break; | |
1838 | default: | |
d8162558 JL |
1839 | /* |
1840 | * An option we don't recognize. Save it off for later | |
1841 | * if we haven't already found one | |
1842 | */ | |
1843 | if (!invalid) | |
1844 | invalid = data; | |
8830d7e0 | 1845 | break; |
1da177e4 | 1846 | } |
8830d7e0 SP |
1847 | /* Free up any allocated string */ |
1848 | kfree(string); | |
1849 | string = NULL; | |
1da177e4 | 1850 | } |
0eb8a132 | 1851 | |
d8162558 JL |
1852 | if (!sloppy && invalid) { |
1853 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1854 | goto cifs_parse_mount_err; | |
1855 | } | |
1856 | ||
8a8798a5 JL |
1857 | #ifndef CONFIG_KEYS |
1858 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1859 | if (vol->multiuser) { | |
1860 | cERROR(1, "Multiuser mounts require kernels with " | |
1861 | "CONFIG_KEYS enabled."); | |
b946845a | 1862 | goto cifs_parse_mount_err; |
0eb8a132 | 1863 | } |
8a8798a5 | 1864 | #endif |
0eb8a132 | 1865 | |
fb8c4b14 | 1866 | if (vol->UNCip == NULL) |
1da177e4 LT |
1867 | vol->UNCip = &vol->UNC[2]; |
1868 | ||
9b9d6b24 JL |
1869 | if (uid_specified) |
1870 | vol->override_uid = override_uid; | |
1871 | else if (override_uid == 1) | |
1872 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1873 | "specified with no uid= option.\n"); | |
1874 | ||
1875 | if (gid_specified) | |
1876 | vol->override_gid = override_gid; | |
1877 | else if (override_gid == 1) | |
1878 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1879 | "specified with no gid= option.\n"); | |
1880 | ||
b946845a | 1881 | kfree(mountdata_copy); |
1da177e4 | 1882 | return 0; |
b946845a | 1883 | |
8830d7e0 SP |
1884 | out_nomem: |
1885 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1886 | cifs_parse_mount_err: |
8830d7e0 | 1887 | kfree(string); |
b946845a SF |
1888 | kfree(mountdata_copy); |
1889 | return 1; | |
1da177e4 LT |
1890 | } |
1891 | ||
3eb9a889 BG |
1892 | /** Returns true if srcaddr isn't specified and rhs isn't |
1893 | * specified, or if srcaddr is specified and | |
1894 | * matches the IP address of the rhs argument. | |
1895 | */ | |
1896 | static bool | |
1897 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1898 | { | |
1899 | switch (srcaddr->sa_family) { | |
1900 | case AF_UNSPEC: | |
1901 | return (rhs->sa_family == AF_UNSPEC); | |
1902 | case AF_INET: { | |
1903 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1904 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1905 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1906 | } | |
1907 | case AF_INET6: { | |
1908 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1909 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1910 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1911 | } | |
1912 | default: | |
1913 | WARN_ON(1); | |
1914 | return false; /* don't expect to be here */ | |
1915 | } | |
1916 | } | |
1917 | ||
4b886136 PS |
1918 | /* |
1919 | * If no port is specified in addr structure, we try to match with 445 port | |
1920 | * and if it fails - with 139 ports. It should be called only if address | |
1921 | * families of server and addr are equal. | |
1922 | */ | |
1923 | static bool | |
1924 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1925 | { | |
6da97910 | 1926 | __be16 port, *sport; |
4b886136 PS |
1927 | |
1928 | switch (addr->sa_family) { | |
1929 | case AF_INET: | |
1930 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1931 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1932 | break; | |
1933 | case AF_INET6: | |
1934 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1935 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1936 | break; | |
1937 | default: | |
1938 | WARN_ON(1); | |
1939 | return false; | |
1940 | } | |
1941 | ||
1942 | if (!port) { | |
1943 | port = htons(CIFS_PORT); | |
1944 | if (port == *sport) | |
1945 | return true; | |
1946 | ||
1947 | port = htons(RFC1001_PORT); | |
1948 | } | |
1949 | ||
1950 | return port == *sport; | |
1951 | } | |
3eb9a889 | 1952 | |
4515148e | 1953 | static bool |
3eb9a889 BG |
1954 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1955 | struct sockaddr *srcaddr) | |
4515148e | 1956 | { |
4515148e | 1957 | switch (addr->sa_family) { |
a9f1b85e PS |
1958 | case AF_INET: { |
1959 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1960 | struct sockaddr_in *srv_addr4 = | |
1961 | (struct sockaddr_in *)&server->dstaddr; | |
1962 | ||
1963 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1964 | return false; |
4515148e | 1965 | break; |
a9f1b85e PS |
1966 | } |
1967 | case AF_INET6: { | |
1968 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1969 | struct sockaddr_in6 *srv_addr6 = | |
1970 | (struct sockaddr_in6 *)&server->dstaddr; | |
1971 | ||
4515148e | 1972 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1973 | &srv_addr6->sin6_addr)) |
4515148e | 1974 | return false; |
a9f1b85e | 1975 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1976 | return false; |
4515148e JL |
1977 | break; |
1978 | } | |
a9f1b85e PS |
1979 | default: |
1980 | WARN_ON(1); | |
1981 | return false; /* don't expect to be here */ | |
1982 | } | |
4515148e | 1983 | |
3eb9a889 BG |
1984 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1985 | return false; | |
1986 | ||
4515148e JL |
1987 | return true; |
1988 | } | |
1989 | ||
daf5b0b6 JL |
1990 | static bool |
1991 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1992 | { | |
1993 | unsigned int secFlags; | |
1994 | ||
1995 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1996 | secFlags = vol->secFlg; | |
1997 | else | |
1998 | secFlags = global_secflags | vol->secFlg; | |
1999 | ||
2000 | switch (server->secType) { | |
2001 | case LANMAN: | |
2002 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
2003 | return false; | |
2004 | break; | |
2005 | case NTLMv2: | |
2006 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
2007 | return false; | |
2008 | break; | |
2009 | case NTLM: | |
2010 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
2011 | return false; | |
2012 | break; | |
2013 | case Kerberos: | |
2014 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
2015 | return false; | |
2016 | break; | |
2017 | case RawNTLMSSP: | |
2018 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
2019 | return false; | |
2020 | break; | |
2021 | default: | |
2022 | /* shouldn't happen */ | |
2023 | return false; | |
2024 | } | |
2025 | ||
25985edc | 2026 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 2027 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 2028 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
2029 | return false; |
2030 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 2031 | (server->sec_mode & |
daf5b0b6 JL |
2032 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
2033 | return false; | |
2034 | ||
2035 | return true; | |
2036 | } | |
2037 | ||
37bb04e5 PS |
2038 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
2039 | struct smb_vol *vol) | |
2040 | { | |
2041 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
2042 | return 0; | |
2043 | ||
2044 | if (!match_address(server, addr, | |
2045 | (struct sockaddr *)&vol->srcaddr)) | |
2046 | return 0; | |
2047 | ||
2048 | if (!match_port(server, addr)) | |
2049 | return 0; | |
2050 | ||
2051 | if (!match_security(server, vol)) | |
2052 | return 0; | |
2053 | ||
2054 | return 1; | |
2055 | } | |
2056 | ||
e7ddee90 | 2057 | static struct TCP_Server_Info * |
daf5b0b6 | 2058 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 2059 | { |
e7ddee90 | 2060 | struct TCP_Server_Info *server; |
e7ddee90 | 2061 | |
3f9bcca7 | 2062 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2063 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 2064 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
2065 | continue; |
2066 | ||
e7ddee90 | 2067 | ++server->srv_count; |
3f9bcca7 | 2068 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 2069 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 2070 | return server; |
1da177e4 | 2071 | } |
3f9bcca7 | 2072 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2073 | return NULL; |
2074 | } | |
1b20d672 | 2075 | |
14fbf50d | 2076 | static void |
e7ddee90 | 2077 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2078 | { |
e7ddee90 | 2079 | struct task_struct *task; |
1b20d672 | 2080 | |
3f9bcca7 | 2081 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2082 | if (--server->srv_count > 0) { |
3f9bcca7 | 2083 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2084 | return; |
1da177e4 | 2085 | } |
1b20d672 | 2086 | |
f1d0c998 RL |
2087 | put_net(cifs_net_ns(server)); |
2088 | ||
e7ddee90 | 2089 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2090 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2091 | |
c74093b6 JL |
2092 | cancel_delayed_work_sync(&server->echo); |
2093 | ||
e7ddee90 JL |
2094 | spin_lock(&GlobalMid_Lock); |
2095 | server->tcpStatus = CifsExiting; | |
2096 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2097 | |
d2b91521 | 2098 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2099 | cifs_fscache_release_client_cookie(server); |
2100 | ||
21e73393 SP |
2101 | kfree(server->session_key.response); |
2102 | server->session_key.response = NULL; | |
2103 | server->session_key.len = 0; | |
2104 | ||
e7ddee90 JL |
2105 | task = xchg(&server->tsk, NULL); |
2106 | if (task) | |
2107 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2108 | } |
2109 | ||
63c038c2 JL |
2110 | static struct TCP_Server_Info * |
2111 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2112 | { | |
2113 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 2114 | struct sockaddr_storage addr; |
63c038c2 JL |
2115 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
2116 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
2117 | int rc; | |
2118 | ||
a9ac49d3 | 2119 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 2120 | |
b6b38f70 | 2121 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 2122 | |
1e68b2b2 | 2123 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
2124 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
2125 | volume_info->UNCip, | |
67b7626a | 2126 | strlen(volume_info->UNCip), |
50d97160 | 2127 | volume_info->port); |
1e68b2b2 | 2128 | if (!rc) { |
63c038c2 JL |
2129 | /* we failed translating address */ |
2130 | rc = -EINVAL; | |
2131 | goto out_err; | |
2132 | } | |
63c038c2 JL |
2133 | } else if (volume_info->UNCip) { |
2134 | /* BB using ip addr as tcp_ses name to connect to the | |
2135 | DFS root below */ | |
b6b38f70 | 2136 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
2137 | rc = -EINVAL; |
2138 | goto out_err; | |
2139 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
2140 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
2141 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
2142 | rc = -EINVAL; |
2143 | goto out_err; | |
2144 | } | |
2145 | ||
2146 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 2147 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
2148 | if (tcp_ses) |
2149 | return tcp_ses; | |
2150 | ||
2151 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2152 | if (!tcp_ses) { | |
2153 | rc = -ENOMEM; | |
2154 | goto out_err; | |
2155 | } | |
2156 | ||
d2b91521 SP |
2157 | rc = cifs_crypto_shash_allocate(tcp_ses); |
2158 | if (rc) { | |
2159 | cERROR(1, "could not setup hash structures rc %d", rc); | |
2160 | goto out_err; | |
2161 | } | |
2162 | ||
f1d0c998 | 2163 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2164 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2165 | if (IS_ERR(tcp_ses->hostname)) { | |
2166 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2167 | goto out_err_crypto_release; |
63c038c2 JL |
2168 | } |
2169 | ||
2170 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2171 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2172 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2173 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2174 | tcp_ses->credits = 1; |
63c038c2 JL |
2175 | init_waitqueue_head(&tcp_ses->response_q); |
2176 | init_waitqueue_head(&tcp_ses->request_q); | |
2177 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2178 | mutex_init(&tcp_ses->srv_mutex); | |
2179 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2180 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2181 | memcpy(tcp_ses->server_RFC1001_name, | |
2182 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2183 | tcp_ses->session_estab = false; |
63c038c2 | 2184 | tcp_ses->sequence_number = 0; |
fda35943 | 2185 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
2186 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2187 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2188 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
2189 | |
2190 | /* | |
2191 | * at this point we are the only ones with the pointer | |
2192 | * to the struct since the kernel thread not created yet | |
2193 | * no need to spinlock this init of tcpStatus or srv_count | |
2194 | */ | |
2195 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
2196 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2197 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
2198 | ++tcp_ses->srv_count; |
2199 | ||
a9ac49d3 | 2200 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 2201 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
2202 | /* BB should we allow ipv6 on port 139? */ |
2203 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
2204 | memcpy(&tcp_ses->dstaddr, sin_server6, |
2205 | sizeof(struct sockaddr_in6)); | |
2206 | } else | |
2207 | memcpy(&tcp_ses->dstaddr, sin_server, | |
2208 | sizeof(struct sockaddr_in)); | |
2209 | ||
2210 | rc = ip_connect(tcp_ses); | |
63c038c2 | 2211 | if (rc < 0) { |
b6b38f70 | 2212 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 2213 | goto out_err_crypto_release; |
63c038c2 JL |
2214 | } |
2215 | ||
2216 | /* | |
2217 | * since we're in a cifs function already, we know that | |
2218 | * this will succeed. No need for try_module_get(). | |
2219 | */ | |
2220 | __module_get(THIS_MODULE); | |
7c97c200 | 2221 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2222 | tcp_ses, "cifsd"); |
2223 | if (IS_ERR(tcp_ses->tsk)) { | |
2224 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 2225 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 2226 | module_put(THIS_MODULE); |
f7c5445a | 2227 | goto out_err_crypto_release; |
63c038c2 | 2228 | } |
fd88ce93 | 2229 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2230 | |
2231 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2232 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2233 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2234 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2235 | |
488f1d2d SJ |
2236 | cifs_fscache_get_client_cookie(tcp_ses); |
2237 | ||
c74093b6 | 2238 | /* queue echo request delayed work */ |
da472fc8 | 2239 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2240 | |
63c038c2 JL |
2241 | return tcp_ses; |
2242 | ||
f7c5445a | 2243 | out_err_crypto_release: |
d2b91521 SP |
2244 | cifs_crypto_shash_release(tcp_ses); |
2245 | ||
f1d0c998 RL |
2246 | put_net(cifs_net_ns(tcp_ses)); |
2247 | ||
63c038c2 JL |
2248 | out_err: |
2249 | if (tcp_ses) { | |
8347a5cd SF |
2250 | if (!IS_ERR(tcp_ses->hostname)) |
2251 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2252 | if (tcp_ses->ssocket) |
2253 | sock_release(tcp_ses->ssocket); | |
2254 | kfree(tcp_ses); | |
2255 | } | |
2256 | return ERR_PTR(rc); | |
2257 | } | |
2258 | ||
96daf2b0 | 2259 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2260 | { |
2261 | switch (ses->server->secType) { | |
2262 | case Kerberos: | |
2263 | if (vol->cred_uid != ses->cred_uid) | |
2264 | return 0; | |
2265 | break; | |
2266 | default: | |
04febabc JL |
2267 | /* NULL username means anonymous session */ |
2268 | if (ses->user_name == NULL) { | |
2269 | if (!vol->nullauth) | |
2270 | return 0; | |
2271 | break; | |
2272 | } | |
2273 | ||
37bb04e5 | 2274 | /* anything else takes username/password */ |
04febabc JL |
2275 | if (strncmp(ses->user_name, |
2276 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2277 | MAX_USERNAME_SIZE)) |
2278 | return 0; | |
2279 | if (strlen(vol->username) != 0 && | |
2280 | ses->password != NULL && | |
2281 | strncmp(ses->password, | |
2282 | vol->password ? vol->password : "", | |
2283 | MAX_PASSWORD_SIZE)) | |
2284 | return 0; | |
2285 | } | |
2286 | return 1; | |
2287 | } | |
2288 | ||
96daf2b0 | 2289 | static struct cifs_ses * |
4ff67b72 | 2290 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2291 | { |
96daf2b0 | 2292 | struct cifs_ses *ses; |
dea570e0 | 2293 | |
3f9bcca7 | 2294 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2295 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2296 | if (!match_session(ses, vol)) |
2297 | continue; | |
14fbf50d | 2298 | ++ses->ses_count; |
3f9bcca7 | 2299 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2300 | return ses; |
2301 | } | |
3f9bcca7 | 2302 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2303 | return NULL; |
2304 | } | |
dea570e0 | 2305 | |
14fbf50d | 2306 | static void |
96daf2b0 | 2307 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d JL |
2308 | { |
2309 | int xid; | |
2310 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 2311 | |
36988c76 | 2312 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 2313 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2314 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2315 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2316 | return; |
2317 | } | |
dea570e0 | 2318 | |
14fbf50d | 2319 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2320 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2321 | |
14fbf50d JL |
2322 | if (ses->status == CifsGood) { |
2323 | xid = GetXid(); | |
2324 | CIFSSMBLogoff(xid, ses); | |
2325 | _FreeXid(xid); | |
2326 | } | |
2327 | sesInfoFree(ses); | |
2328 | cifs_put_tcp_session(server); | |
2329 | } | |
dea570e0 | 2330 | |
8a8798a5 JL |
2331 | #ifdef CONFIG_KEYS |
2332 | ||
2333 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2334 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2335 | ||
2336 | /* Populate username and pw fields from keyring if possible */ | |
2337 | static int | |
2338 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2339 | { | |
2340 | int rc = 0; | |
2341 | char *desc, *delim, *payload; | |
2342 | ssize_t len; | |
2343 | struct key *key; | |
2344 | struct TCP_Server_Info *server = ses->server; | |
2345 | struct sockaddr_in *sa; | |
2346 | struct sockaddr_in6 *sa6; | |
2347 | struct user_key_payload *upayload; | |
2348 | ||
2349 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2350 | if (!desc) | |
2351 | return -ENOMEM; | |
2352 | ||
2353 | /* try to find an address key first */ | |
2354 | switch (server->dstaddr.ss_family) { | |
2355 | case AF_INET: | |
2356 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2357 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2358 | break; | |
2359 | case AF_INET6: | |
2360 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2361 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2362 | break; | |
2363 | default: | |
2364 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2365 | rc = -EINVAL; | |
2366 | goto out_err; | |
2367 | } | |
2368 | ||
2369 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2370 | key = request_key(&key_type_logon, desc, ""); | |
2371 | if (IS_ERR(key)) { | |
2372 | if (!ses->domainName) { | |
2373 | cFYI(1, "domainName is NULL"); | |
2374 | rc = PTR_ERR(key); | |
2375 | goto out_err; | |
2376 | } | |
2377 | ||
2378 | /* didn't work, try to find a domain key */ | |
2379 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2380 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2381 | key = request_key(&key_type_logon, desc, ""); | |
2382 | if (IS_ERR(key)) { | |
2383 | rc = PTR_ERR(key); | |
2384 | goto out_err; | |
2385 | } | |
2386 | } | |
2387 | ||
2388 | down_read(&key->sem); | |
2389 | upayload = key->payload.data; | |
2390 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2391 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2392 | goto out_key_put; |
2393 | } | |
2394 | ||
2395 | /* find first : in payload */ | |
2396 | payload = (char *)upayload->data; | |
2397 | delim = strnchr(payload, upayload->datalen, ':'); | |
2398 | cFYI(1, "payload=%s", payload); | |
2399 | if (!delim) { | |
2400 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2401 | upayload->datalen); | |
2402 | rc = -EINVAL; | |
2403 | goto out_key_put; | |
2404 | } | |
2405 | ||
2406 | len = delim - payload; | |
2407 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2408 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2409 | rc = -EINVAL; |
2410 | goto out_key_put; | |
2411 | } | |
2412 | ||
2413 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2414 | if (!vol->username) { | |
000f9bb8 | 2415 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2416 | rc = -ENOMEM; |
2417 | goto out_key_put; | |
2418 | } | |
2419 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2420 | ||
2421 | len = key->datalen - (len + 1); | |
2422 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2423 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2424 | rc = -EINVAL; |
2425 | kfree(vol->username); | |
2426 | vol->username = NULL; | |
2427 | goto out_key_put; | |
2428 | } | |
2429 | ||
2430 | ++delim; | |
2431 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2432 | if (!vol->password) { | |
000f9bb8 | 2433 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2434 | rc = -ENOMEM; |
2435 | kfree(vol->username); | |
2436 | vol->username = NULL; | |
2437 | goto out_key_put; | |
2438 | } | |
2439 | ||
2440 | out_key_put: | |
2441 | up_read(&key->sem); | |
2442 | key_put(key); | |
2443 | out_err: | |
2444 | kfree(desc); | |
2445 | cFYI(1, "%s: returning %d", __func__, rc); | |
2446 | return rc; | |
2447 | } | |
2448 | #else /* ! CONFIG_KEYS */ | |
2449 | static inline int | |
2450 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2451 | struct cifs_ses *ses __attribute__((unused))) | |
2452 | { | |
2453 | return -ENOSYS; | |
2454 | } | |
2455 | #endif /* CONFIG_KEYS */ | |
2456 | ||
d9b94201 SF |
2457 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2458 | ||
96daf2b0 | 2459 | static struct cifs_ses * |
36988c76 JL |
2460 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2461 | { | |
2462 | int rc = -ENOMEM, xid; | |
96daf2b0 | 2463 | struct cifs_ses *ses; |
a9f1b85e PS |
2464 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2465 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
2466 | |
2467 | xid = GetXid(); | |
2468 | ||
4ff67b72 | 2469 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2470 | if (ses) { |
2471 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2472 | ||
36988c76 | 2473 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2474 | rc = cifs_negotiate_protocol(xid, ses); |
2475 | if (rc) { | |
2476 | mutex_unlock(&ses->session_mutex); | |
2477 | /* problem -- put our ses reference */ | |
2478 | cifs_put_smb_ses(ses); | |
2479 | FreeXid(xid); | |
2480 | return ERR_PTR(rc); | |
2481 | } | |
36988c76 JL |
2482 | if (ses->need_reconnect) { |
2483 | cFYI(1, "Session needs reconnect"); | |
2484 | rc = cifs_setup_session(xid, ses, | |
2485 | volume_info->local_nls); | |
2486 | if (rc) { | |
2487 | mutex_unlock(&ses->session_mutex); | |
2488 | /* problem -- put our reference */ | |
2489 | cifs_put_smb_ses(ses); | |
2490 | FreeXid(xid); | |
2491 | return ERR_PTR(rc); | |
2492 | } | |
2493 | } | |
2494 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2495 | |
2496 | /* existing SMB ses has a server reference already */ | |
2497 | cifs_put_tcp_session(server); | |
36988c76 JL |
2498 | FreeXid(xid); |
2499 | return ses; | |
2500 | } | |
2501 | ||
2502 | cFYI(1, "Existing smb sess not found"); | |
2503 | ses = sesInfoAlloc(); | |
2504 | if (ses == NULL) | |
2505 | goto get_ses_fail; | |
2506 | ||
2507 | /* new SMB session uses our server ref */ | |
2508 | ses->server = server; | |
a9f1b85e PS |
2509 | if (server->dstaddr.ss_family == AF_INET6) |
2510 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2511 | else |
a9f1b85e | 2512 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2513 | |
8727c8a8 SF |
2514 | if (volume_info->username) { |
2515 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2516 | if (!ses->user_name) | |
2517 | goto get_ses_fail; | |
2518 | } | |
36988c76 JL |
2519 | |
2520 | /* volume_info->password freed at unmount */ | |
2521 | if (volume_info->password) { | |
2522 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2523 | if (!ses->password) | |
2524 | goto get_ses_fail; | |
2525 | } | |
2526 | if (volume_info->domainname) { | |
d3686d54 SP |
2527 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2528 | if (!ses->domainName) | |
2529 | goto get_ses_fail; | |
36988c76 | 2530 | } |
3e4b3e1f | 2531 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2532 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2533 | |
2534 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2535 | supported for many years, time to update default security mechanism */ | |
2536 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2537 | warned_on_ntlm = true; | |
2538 | cERROR(1, "default security mechanism requested. The default " | |
2539 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2540 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2541 | } |
36988c76 JL |
2542 | ses->overrideSecFlg = volume_info->secFlg; |
2543 | ||
2544 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2545 | rc = cifs_negotiate_protocol(xid, ses); |
2546 | if (!rc) | |
2547 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2548 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2549 | if (rc) |
36988c76 JL |
2550 | goto get_ses_fail; |
2551 | ||
2552 | /* success, put it on the list */ | |
3f9bcca7 | 2553 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2554 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2555 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2556 | |
2557 | FreeXid(xid); | |
2558 | return ses; | |
2559 | ||
2560 | get_ses_fail: | |
2561 | sesInfoFree(ses); | |
2562 | FreeXid(xid); | |
2563 | return ERR_PTR(rc); | |
2564 | } | |
2565 | ||
96daf2b0 | 2566 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2567 | { |
2568 | if (tcon->tidStatus == CifsExiting) | |
2569 | return 0; | |
2570 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2571 | return 0; | |
2572 | return 1; | |
2573 | } | |
2574 | ||
96daf2b0 SF |
2575 | static struct cifs_tcon * |
2576 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2577 | { |
2578 | struct list_head *tmp; | |
96daf2b0 | 2579 | struct cifs_tcon *tcon; |
f1987b44 | 2580 | |
3f9bcca7 | 2581 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2582 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2583 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2584 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2585 | continue; |
f1987b44 | 2586 | ++tcon->tc_count; |
3f9bcca7 | 2587 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2588 | return tcon; |
1da177e4 | 2589 | } |
3f9bcca7 | 2590 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2591 | return NULL; |
2592 | } | |
2593 | ||
f1987b44 | 2594 | static void |
96daf2b0 | 2595 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 JL |
2596 | { |
2597 | int xid; | |
96daf2b0 | 2598 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2599 | |
d00c28de | 2600 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2601 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2602 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2603 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2604 | return; |
2605 | } | |
2606 | ||
2607 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2608 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2609 | |
2610 | xid = GetXid(); | |
2611 | CIFSSMBTDis(xid, tcon); | |
2612 | _FreeXid(xid); | |
2613 | ||
d03382ce | 2614 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2615 | tconInfoFree(tcon); |
f1987b44 JL |
2616 | cifs_put_smb_ses(ses); |
2617 | } | |
2618 | ||
96daf2b0 SF |
2619 | static struct cifs_tcon * |
2620 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2621 | { |
2622 | int rc, xid; | |
96daf2b0 | 2623 | struct cifs_tcon *tcon; |
d00c28de JL |
2624 | |
2625 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2626 | if (tcon) { | |
2627 | cFYI(1, "Found match on UNC path"); | |
2628 | /* existing tcon already has a reference */ | |
2629 | cifs_put_smb_ses(ses); | |
2630 | if (tcon->seal != volume_info->seal) | |
2631 | cERROR(1, "transport encryption setting " | |
2632 | "conflicts with existing tid"); | |
2633 | return tcon; | |
2634 | } | |
2635 | ||
2636 | tcon = tconInfoAlloc(); | |
2637 | if (tcon == NULL) { | |
2638 | rc = -ENOMEM; | |
2639 | goto out_fail; | |
2640 | } | |
2641 | ||
2642 | tcon->ses = ses; | |
2643 | if (volume_info->password) { | |
2644 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2645 | if (!tcon->password) { | |
2646 | rc = -ENOMEM; | |
2647 | goto out_fail; | |
2648 | } | |
2649 | } | |
2650 | ||
2651 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2652 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2653 | cERROR(1, "Missing share name"); | |
2654 | rc = -ENODEV; | |
2655 | goto out_fail; | |
2656 | } | |
2657 | ||
2658 | /* BB Do we need to wrap session_mutex around | |
2659 | * this TCon call and Unix SetFS as | |
2660 | * we do on SessSetup and reconnect? */ | |
2661 | xid = GetXid(); | |
2662 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2663 | FreeXid(xid); | |
2664 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2665 | if (rc) | |
2666 | goto out_fail; | |
2667 | ||
2668 | if (volume_info->nodfs) { | |
2669 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2670 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2671 | } | |
2672 | tcon->seal = volume_info->seal; | |
2673 | /* we can have only one retry value for a connection | |
2674 | to a share so for resources mounted more than once | |
2675 | to the same server share the last value passed in | |
2676 | for the retry flag is used */ | |
2677 | tcon->retry = volume_info->retry; | |
2678 | tcon->nocase = volume_info->nocase; | |
2679 | tcon->local_lease = volume_info->local_lease; | |
2680 | ||
3f9bcca7 | 2681 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2682 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2683 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2684 | |
d03382ce SJ |
2685 | cifs_fscache_get_super_cookie(tcon); |
2686 | ||
d00c28de JL |
2687 | return tcon; |
2688 | ||
2689 | out_fail: | |
2690 | tconInfoFree(tcon); | |
2691 | return ERR_PTR(rc); | |
2692 | } | |
2693 | ||
9d002df4 JL |
2694 | void |
2695 | cifs_put_tlink(struct tcon_link *tlink) | |
2696 | { | |
2697 | if (!tlink || IS_ERR(tlink)) | |
2698 | return; | |
2699 | ||
2700 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2701 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2702 | tlink->tl_time = jiffies; | |
2703 | return; | |
2704 | } | |
2705 | ||
2706 | if (!IS_ERR(tlink_tcon(tlink))) | |
2707 | cifs_put_tcon(tlink_tcon(tlink)); | |
2708 | kfree(tlink); | |
2709 | return; | |
2710 | } | |
d00c28de | 2711 | |
25c7f41e | 2712 | static inline struct tcon_link * |
cd51875d PS |
2713 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2714 | { | |
2715 | return cifs_sb->master_tlink; | |
2716 | } | |
25c7f41e PS |
2717 | |
2718 | static int | |
2719 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2720 | { | |
2721 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2722 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2723 | ||
2724 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2725 | return 0; | |
2726 | ||
2727 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2728 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2729 | return 0; | |
2730 | ||
25c7f41e | 2731 | /* |
5eba8ab3 JL |
2732 | * We want to share sb only if we don't specify an r/wsize or |
2733 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2734 | */ |
2735 | if (new->wsize && new->wsize < old->wsize) | |
2736 | return 0; | |
2737 | ||
5eba8ab3 JL |
2738 | if (new->rsize && new->rsize < old->rsize) |
2739 | return 0; | |
2740 | ||
25c7f41e PS |
2741 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2742 | return 0; | |
2743 | ||
2744 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2745 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2746 | return 0; | |
2747 | ||
2748 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2749 | return 0; | |
2750 | ||
2751 | if (old->actimeo != new->actimeo) | |
2752 | return 0; | |
2753 | ||
2754 | return 1; | |
2755 | } | |
2756 | ||
2757 | int | |
2758 | cifs_match_super(struct super_block *sb, void *data) | |
2759 | { | |
2760 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2761 | struct smb_vol *volume_info; | |
2762 | struct cifs_sb_info *cifs_sb; | |
2763 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2764 | struct cifs_ses *ses; |
2765 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2766 | struct tcon_link *tlink; |
2767 | struct sockaddr_storage addr; | |
2768 | int rc = 0; | |
2769 | ||
2770 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2771 | ||
2772 | spin_lock(&cifs_tcp_ses_lock); | |
2773 | cifs_sb = CIFS_SB(sb); | |
2774 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2775 | if (IS_ERR(tlink)) { | |
2776 | spin_unlock(&cifs_tcp_ses_lock); | |
2777 | return rc; | |
2778 | } | |
2779 | tcon = tlink_tcon(tlink); | |
2780 | ses = tcon->ses; | |
2781 | tcp_srv = ses->server; | |
2782 | ||
2783 | volume_info = mnt_data->vol; | |
2784 | ||
2785 | if (!volume_info->UNCip || !volume_info->UNC) | |
2786 | goto out; | |
2787 | ||
2788 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2789 | volume_info->UNCip, | |
2790 | strlen(volume_info->UNCip), | |
2791 | volume_info->port); | |
2792 | if (!rc) | |
2793 | goto out; | |
2794 | ||
2795 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2796 | !match_session(ses, volume_info) || | |
2797 | !match_tcon(tcon, volume_info->UNC)) { | |
2798 | rc = 0; | |
2799 | goto out; | |
2800 | } | |
2801 | ||
2802 | rc = compare_mount_options(sb, mnt_data); | |
2803 | out: | |
25c7f41e | 2804 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2805 | cifs_put_tlink(tlink); |
25c7f41e PS |
2806 | return rc; |
2807 | } | |
2808 | ||
1da177e4 | 2809 | int |
96daf2b0 | 2810 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
50c2f753 | 2811 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
366781c1 | 2812 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2813 | { |
2814 | char *temp_unc; | |
2815 | int rc = 0; | |
2816 | ||
2817 | *pnum_referrals = 0; | |
366781c1 | 2818 | *preferrals = NULL; |
1da177e4 LT |
2819 | |
2820 | if (pSesInfo->ipc_tid == 0) { | |
2821 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2822 | strnlen(pSesInfo->serverName, |
2823 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2824 | + 1 + 4 /* slash IPC$ */ + 2, |
2825 | GFP_KERNEL); | |
2826 | if (temp_unc == NULL) | |
2827 | return -ENOMEM; | |
2828 | temp_unc[0] = '\\'; | |
2829 | temp_unc[1] = '\\'; | |
2830 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2831 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2832 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2833 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2834 | kfree(temp_unc); |
2835 | } | |
2836 | if (rc == 0) | |
c2cf07d5 | 2837 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2838 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2839 | /* BB map targetUNCs to dfs_info3 structures, here or |
2840 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2841 | |
2842 | return rc; | |
2843 | } | |
2844 | ||
09e50d55 JL |
2845 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2846 | static struct lock_class_key cifs_key[2]; | |
2847 | static struct lock_class_key cifs_slock_key[2]; | |
2848 | ||
2849 | static inline void | |
2850 | cifs_reclassify_socket4(struct socket *sock) | |
2851 | { | |
2852 | struct sock *sk = sock->sk; | |
2853 | BUG_ON(sock_owned_by_user(sk)); | |
2854 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2855 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2856 | } | |
2857 | ||
2858 | static inline void | |
2859 | cifs_reclassify_socket6(struct socket *sock) | |
2860 | { | |
2861 | struct sock *sk = sock->sk; | |
2862 | BUG_ON(sock_owned_by_user(sk)); | |
2863 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2864 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2865 | } | |
2866 | #else | |
2867 | static inline void | |
2868 | cifs_reclassify_socket4(struct socket *sock) | |
2869 | { | |
2870 | } | |
2871 | ||
2872 | static inline void | |
2873 | cifs_reclassify_socket6(struct socket *sock) | |
2874 | { | |
2875 | } | |
2876 | #endif | |
2877 | ||
1da177e4 | 2878 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2879 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2880 | { |
50c2f753 | 2881 | unsigned int i, j; |
1da177e4 | 2882 | |
50c2f753 | 2883 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2884 | /* mask a nibble at a time and encode */ |
2885 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2886 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2887 | j += 2; |
1da177e4 LT |
2888 | } |
2889 | ||
2890 | } | |
2891 | ||
3eb9a889 BG |
2892 | static int |
2893 | bind_socket(struct TCP_Server_Info *server) | |
2894 | { | |
2895 | int rc = 0; | |
2896 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2897 | /* Bind to the specified local IP address */ | |
2898 | struct socket *socket = server->ssocket; | |
2899 | rc = socket->ops->bind(socket, | |
2900 | (struct sockaddr *) &server->srcaddr, | |
2901 | sizeof(server->srcaddr)); | |
2902 | if (rc < 0) { | |
2903 | struct sockaddr_in *saddr4; | |
2904 | struct sockaddr_in6 *saddr6; | |
2905 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2906 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2907 | if (saddr6->sin6_family == AF_INET6) | |
2908 | cERROR(1, "cifs: " | |
2909 | "Failed to bind to: %pI6c, error: %d\n", | |
2910 | &saddr6->sin6_addr, rc); | |
2911 | else | |
2912 | cERROR(1, "cifs: " | |
2913 | "Failed to bind to: %pI4, error: %d\n", | |
2914 | &saddr4->sin_addr.s_addr, rc); | |
2915 | } | |
2916 | } | |
2917 | return rc; | |
2918 | } | |
1da177e4 LT |
2919 | |
2920 | static int | |
a9f1b85e | 2921 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2922 | { |
2923 | int rc = 0; | |
a9f1b85e PS |
2924 | /* |
2925 | * some servers require RFC1001 sessinit before sending | |
2926 | * negprot - BB check reconnection in case where second | |
2927 | * sessinit is sent but no second negprot | |
2928 | */ | |
2929 | struct rfc1002_session_packet *ses_init_buf; | |
2930 | struct smb_hdr *smb_buf; | |
2931 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2932 | GFP_KERNEL); | |
2933 | if (ses_init_buf) { | |
2934 | ses_init_buf->trailer.session_req.called_len = 32; | |
2935 | ||
2936 | if (server->server_RFC1001_name && | |
2937 | server->server_RFC1001_name[0] != 0) | |
2938 | rfc1002mangle(ses_init_buf->trailer. | |
2939 | session_req.called_name, | |
2940 | server->server_RFC1001_name, | |
2941 | RFC1001_NAME_LEN_WITH_NULL); | |
2942 | else | |
2943 | rfc1002mangle(ses_init_buf->trailer. | |
2944 | session_req.called_name, | |
2945 | DEFAULT_CIFS_CALLED_NAME, | |
2946 | RFC1001_NAME_LEN_WITH_NULL); | |
2947 | ||
2948 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2949 | ||
2950 | /* | |
2951 | * calling name ends in null (byte 16) from old smb | |
2952 | * convention. | |
2953 | */ | |
2954 | if (server->workstation_RFC1001_name && | |
2955 | server->workstation_RFC1001_name[0] != 0) | |
2956 | rfc1002mangle(ses_init_buf->trailer. | |
2957 | session_req.calling_name, | |
2958 | server->workstation_RFC1001_name, | |
2959 | RFC1001_NAME_LEN_WITH_NULL); | |
2960 | else | |
2961 | rfc1002mangle(ses_init_buf->trailer. | |
2962 | session_req.calling_name, | |
2963 | "LINUX_CIFS_CLNT", | |
2964 | RFC1001_NAME_LEN_WITH_NULL); | |
2965 | ||
2966 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2967 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2968 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2969 | ||
2970 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2971 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2972 | rc = smb_send(server, smb_buf, 0x44); |
2973 | kfree(ses_init_buf); | |
2974 | /* | |
2975 | * RFC1001 layer in at least one server | |
2976 | * requires very short break before negprot | |
2977 | * presumably because not expecting negprot | |
2978 | * to follow so fast. This is a simple | |
2979 | * solution that works without | |
2980 | * complicating the code and causes no | |
2981 | * significant slowing down on mount | |
2982 | * for everyone else | |
2983 | */ | |
2984 | usleep_range(1000, 2000); | |
2985 | } | |
2986 | /* | |
2987 | * else the negprot may still work without this | |
2988 | * even though malloc failed | |
2989 | */ | |
2990 | ||
2991 | return rc; | |
2992 | } | |
2993 | ||
2994 | static int | |
2995 | generic_ip_connect(struct TCP_Server_Info *server) | |
2996 | { | |
2997 | int rc = 0; | |
6da97910 | 2998 | __be16 sport; |
a9f1b85e | 2999 | int slen, sfamily; |
bcf4b106 | 3000 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3001 | struct sockaddr *saddr; |
3002 | ||
3003 | saddr = (struct sockaddr *) &server->dstaddr; | |
3004 | ||
3005 | if (server->dstaddr.ss_family == AF_INET6) { | |
3006 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3007 | slen = sizeof(struct sockaddr_in6); | |
3008 | sfamily = AF_INET6; | |
3009 | } else { | |
3010 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3011 | slen = sizeof(struct sockaddr_in); | |
3012 | sfamily = AF_INET; | |
3013 | } | |
1da177e4 | 3014 | |
bcf4b106 | 3015 | if (socket == NULL) { |
f1d0c998 RL |
3016 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3017 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3018 | if (rc < 0) { |
b6b38f70 | 3019 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 3020 | server->ssocket = NULL; |
1da177e4 | 3021 | return rc; |
1da177e4 | 3022 | } |
bcf4b106 JL |
3023 | |
3024 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 3025 | cFYI(1, "Socket created"); |
bcf4b106 JL |
3026 | server->ssocket = socket; |
3027 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3028 | if (sfamily == AF_INET6) |
3029 | cifs_reclassify_socket6(socket); | |
3030 | else | |
3031 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3032 | } |
3033 | ||
3eb9a889 BG |
3034 | rc = bind_socket(server); |
3035 | if (rc < 0) | |
3036 | return rc; | |
3037 | ||
bcf4b106 JL |
3038 | /* |
3039 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3040 | * the default. sock_setsockopt not used because it expects |
3041 | * user space buffer | |
bcf4b106 JL |
3042 | */ |
3043 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3044 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3045 | |
b387eaeb | 3046 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3047 | if (server->noautotune) { |
3048 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3049 | socket->sk->sk_sndbuf = 200 * 1024; | |
3050 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3051 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3052 | } |
1da177e4 | 3053 | |
6a5fa236 | 3054 | if (server->tcp_nodelay) { |
a9f1b85e | 3055 | int val = 1; |
6a5fa236 SF |
3056 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3057 | (char *)&val, sizeof(val)); | |
3058 | if (rc) | |
b6b38f70 | 3059 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
3060 | } |
3061 | ||
b6b38f70 | 3062 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 3063 | socket->sk->sk_sndbuf, |
b6b38f70 | 3064 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3065 | |
ee1b3ea9 JL |
3066 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3067 | if (rc < 0) { | |
3068 | cFYI(1, "Error %d connecting to server", rc); | |
3069 | sock_release(socket); | |
3070 | server->ssocket = NULL; | |
3071 | return rc; | |
3072 | } | |
3073 | ||
a9f1b85e PS |
3074 | if (sport == htons(RFC1001_PORT)) |
3075 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3076 | |
1da177e4 LT |
3077 | return rc; |
3078 | } | |
3079 | ||
3080 | static int | |
a9f1b85e | 3081 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3082 | { |
6da97910 | 3083 | __be16 *sport; |
a9f1b85e PS |
3084 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3085 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3086 | |
a9f1b85e PS |
3087 | if (server->dstaddr.ss_family == AF_INET6) |
3088 | sport = &addr6->sin6_port; | |
3089 | else | |
3090 | sport = &addr->sin_port; | |
1da177e4 | 3091 | |
a9f1b85e PS |
3092 | if (*sport == 0) { |
3093 | int rc; | |
1da177e4 | 3094 | |
a9f1b85e PS |
3095 | /* try with 445 port at first */ |
3096 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3097 | |
a9f1b85e | 3098 | rc = generic_ip_connect(server); |
1da177e4 | 3099 | if (rc >= 0) |
a9f1b85e | 3100 | return rc; |
6a5fa236 | 3101 | |
a9f1b85e PS |
3102 | /* if it failed, try with 139 port */ |
3103 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3104 | } |
3105 | ||
a9f1b85e | 3106 | return generic_ip_connect(server); |
1da177e4 LT |
3107 | } |
3108 | ||
96daf2b0 | 3109 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
2c6292ae | 3110 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3111 | { |
3112 | /* if we are reconnecting then should we check to see if | |
3113 | * any requested capabilities changed locally e.g. via | |
3114 | * remount but we can not do much about it here | |
3115 | * if they have (even if we could detect it by the following) | |
3116 | * Perhaps we could add a backpointer to array of sb from tcon | |
3117 | * or if we change to make all sb to same share the same | |
3118 | * sb as NFS - then we only have one backpointer to sb. | |
3119 | * What if we wanted to mount the server share twice once with | |
3120 | * and once without posixacls or posix paths? */ | |
3121 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3122 | |
c18c842b SF |
3123 | if (vol_info && vol_info->no_linux_ext) { |
3124 | tcon->fsUnixInfo.Capability = 0; | |
3125 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 3126 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
3127 | return; |
3128 | } else if (vol_info) | |
3129 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3130 | ||
3131 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 3132 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
3133 | return; |
3134 | } | |
50c2f753 | 3135 | |
fb8c4b14 | 3136 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3137 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 3138 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
3139 | /* check for reconnect case in which we do not |
3140 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3141 | if (vol_info == NULL) { |
50c2f753 | 3142 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3143 | originally at mount time */ |
3144 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3145 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3146 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3147 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 3148 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 3149 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3150 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
3151 | cERROR(1, "possible reconnect error"); |
3152 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 3153 | } |
8af18971 | 3154 | } |
50c2f753 | 3155 | |
6848b733 SF |
3156 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
3157 | cERROR(1, "per-share encryption not supported yet"); | |
3158 | ||
8af18971 | 3159 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3160 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3161 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3162 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 3163 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
3164 | if (cifs_sb) |
3165 | cifs_sb->mnt_cifs_flags |= | |
3166 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3167 | } |
3168 | ||
75865f8c | 3169 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3170 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3171 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 3172 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
3173 | if (cifs_sb) |
3174 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3175 | CIFS_MOUNT_POSIX_PATHS; |
3176 | } | |
50c2f753 | 3177 | |
b6b38f70 | 3178 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 3179 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3180 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 3181 | cFYI(1, "FCNTL cap"); |
75865f8c | 3182 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 3183 | cFYI(1, "EXTATTR cap"); |
75865f8c | 3184 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 3185 | cFYI(1, "POSIX path cap"); |
75865f8c | 3186 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 3187 | cFYI(1, "XATTR cap"); |
75865f8c | 3188 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 3189 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 3190 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 3191 | cFYI(1, "very large read cap"); |
75865f8c | 3192 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 3193 | cFYI(1, "very large write cap"); |
6848b733 SF |
3194 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
3195 | cFYI(1, "transport encryption cap"); | |
3196 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
3197 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
3198 | #endif /* CIFS_DEBUG2 */ |
3199 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3200 | if (vol_info == NULL) { |
b6b38f70 | 3201 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 3202 | } else |
b6b38f70 | 3203 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
3204 | "with the server failed. Consider " |
3205 | "mounting with the Unix Extensions\n" | |
3206 | "disabled, if problems are found, " | |
3207 | "by specifying the nounix mount " | |
b6b38f70 | 3208 | "option."); |
5a44b319 | 3209 | |
8af18971 SF |
3210 | } |
3211 | } | |
3212 | } | |
3213 | ||
724d9f1c PS |
3214 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3215 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3216 | { |
2de970ff JL |
3217 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3218 | ||
2ced6f69 AV |
3219 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3220 | cifs_sb->tlink_tree = RB_ROOT; | |
3221 | ||
25c7f41e | 3222 | /* |
5eba8ab3 JL |
3223 | * Temporarily set r/wsize for matching superblock. If we end up using |
3224 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3225 | */ |
5eba8ab3 | 3226 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3227 | cifs_sb->wsize = pvolume_info->wsize; |
3228 | ||
3b795210 SF |
3229 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3230 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3231 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3232 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 3233 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 3234 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 3235 | |
6d20e840 | 3236 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3237 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3238 | |
3b795210 SF |
3239 | if (pvolume_info->noperm) |
3240 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3241 | if (pvolume_info->setuids) | |
3242 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3243 | if (pvolume_info->server_ino) | |
3244 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3245 | if (pvolume_info->remap) | |
3246 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3247 | if (pvolume_info->no_xattr) | |
3248 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3249 | if (pvolume_info->sfu_emul) | |
3250 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3251 | if (pvolume_info->nobrl) | |
3252 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3253 | if (pvolume_info->nostrictsync) |
4717bed6 | 3254 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3255 | if (pvolume_info->mand_lock) |
3256 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3257 | if (pvolume_info->rwpidforward) |
3258 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3259 | if (pvolume_info->cifs_acl) |
3260 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3261 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3262 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3263 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3264 | } | |
3265 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3266 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3267 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3268 | } | |
3b795210 SF |
3269 | if (pvolume_info->override_uid) |
3270 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3271 | if (pvolume_info->override_gid) | |
3272 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3273 | if (pvolume_info->dynperm) | |
3274 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3275 | if (pvolume_info->fsc) |
3276 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3277 | if (pvolume_info->multiuser) |
3278 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3279 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3280 | if (pvolume_info->strict_io) |
3281 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3282 | if (pvolume_info->direct_io) { |
b6b38f70 | 3283 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3284 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3285 | } | |
736a3320 SM |
3286 | if (pvolume_info->mfsymlinks) { |
3287 | if (pvolume_info->sfu_emul) { | |
3288 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3289 | "mount option is used"); | |
3290 | } else { | |
3291 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3292 | } | |
3293 | } | |
3b795210 SF |
3294 | |
3295 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3296 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3297 | "mount option supported"); | |
b1c8d2b4 JL |
3298 | } |
3299 | ||
f7910cbd | 3300 | /* |
5eba8ab3 JL |
3301 | * When the server supports very large reads and writes via POSIX extensions, |
3302 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not | |
3303 | * including the RFC1001 length. | |
f7910cbd JL |
3304 | * |
3305 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
3306 | * writeback however as we have to allocate an array of pointers for the |
3307 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
5eba8ab3 JL |
3308 | * |
3309 | * For reads, there is a similar problem as we need to allocate an array | |
3310 | * of kvecs to handle the receive, though that should only need to be done | |
3311 | * once. | |
f7910cbd | 3312 | */ |
1190f6a0 | 3313 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3314 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3315 | |
3316 | /* | |
5eba8ab3 JL |
3317 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
3318 | * of 2^17-1 minus the size of the call header. That allows for a read or | |
3319 | * write up to the maximum size described by RFC1002. | |
f7910cbd | 3320 | */ |
94443f43 | 3321 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3322 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3323 | |
3324 | /* | |
3325 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
3326 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
3327 | * a single wsize request with a single call. | |
3328 | */ | |
5eba8ab3 JL |
3329 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
3330 | ||
3331 | /* | |
ce91acb3 JL |
3332 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
3333 | * those values when posix extensions aren't in force. In actuality here, we | |
3334 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem | |
3335 | * to be ok with the extra byte even though Windows doesn't send writes that | |
3336 | * are that large. | |
3337 | * | |
3338 | * Citation: | |
3339 | * | |
3340 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx | |
5eba8ab3 JL |
3341 | */ |
3342 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) | |
ce91acb3 | 3343 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
f7910cbd JL |
3344 | |
3345 | static unsigned int | |
96daf2b0 | 3346 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
3347 | { |
3348 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3349 | struct TCP_Server_Info *server = tcon->ses->server; | |
ce91acb3 JL |
3350 | unsigned int wsize; |
3351 | ||
3352 | /* start with specified wsize, or default */ | |
3353 | if (pvolume_info->wsize) | |
3354 | wsize = pvolume_info->wsize; | |
3355 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
3356 | wsize = CIFS_DEFAULT_IOSIZE; | |
3357 | else | |
3358 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
f7910cbd JL |
3359 | |
3360 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
3361 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 3362 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 3363 | |
1190f6a0 JL |
3364 | /* |
3365 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
3366 | * Limit it to max buffer offered by the server, minus the size of the | |
3367 | * WRITEX header, not including the 4 byte RFC1001 length. | |
3368 | */ | |
3369 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
3370 | (!(server->capabilities & CAP_UNIX) && | |
3371 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
3372 | wsize = min_t(unsigned int, wsize, | |
3373 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd JL |
3374 | |
3375 | /* hard limit of CIFS_MAX_WSIZE */ | |
3376 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
3377 | ||
3378 | return wsize; | |
3379 | } | |
3380 | ||
5eba8ab3 JL |
3381 | static unsigned int |
3382 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) | |
3383 | { | |
3384 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3385 | struct TCP_Server_Info *server = tcon->ses->server; | |
3386 | unsigned int rsize, defsize; | |
3387 | ||
3388 | /* | |
3389 | * Set default value... | |
3390 | * | |
3391 | * HACK alert! Ancient servers have very small buffers. Even though | |
3392 | * MS-CIFS indicates that servers are only limited by the client's | |
3393 | * bufsize for reads, testing against win98se shows that it throws | |
3394 | * INVALID_PARAMETER errors if you try to request too large a read. | |
3395 | * | |
3396 | * If the server advertises a MaxBufferSize of less than one page, | |
3397 | * assume that it also can't satisfy reads larger than that either. | |
3398 | * | |
3399 | * FIXME: Is there a better heuristic for this? | |
3400 | */ | |
3401 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
3402 | defsize = CIFS_DEFAULT_IOSIZE; | |
3403 | else if (server->capabilities & CAP_LARGE_READ_X) | |
3404 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
3405 | else if (server->maxBuf >= PAGE_CACHE_SIZE) | |
3406 | defsize = CIFSMaxBufSize; | |
3407 | else | |
3408 | defsize = server->maxBuf - sizeof(READ_RSP); | |
3409 | ||
3410 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; | |
3411 | ||
3412 | /* | |
3413 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
3414 | * the client's MaxBufferSize. | |
3415 | */ | |
3416 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
3417 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
3418 | ||
3419 | /* hard limit of CIFS_MAX_RSIZE */ | |
3420 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
3421 | ||
3422 | return rsize; | |
3423 | } | |
3424 | ||
e4cce94c | 3425 | static int |
96daf2b0 | 3426 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
3427 | struct cifs_sb_info *cifs_sb, const char *full_path) |
3428 | { | |
3429 | int rc; | |
e4cce94c IM |
3430 | FILE_ALL_INFO *pfile_info; |
3431 | ||
e4cce94c IM |
3432 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
3433 | if (pfile_info == NULL) | |
3434 | return -ENOMEM; | |
3435 | ||
3436 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
3437 | 0 /* not legacy */, cifs_sb->local_nls, | |
3438 | cifs_sb->mnt_cifs_flags & | |
3439 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
3440 | |
3441 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
3442 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
3443 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
3444 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
3445 | kfree(pfile_info); |
3446 | return rc; | |
3447 | } | |
3448 | ||
b9bce2e9 JL |
3449 | static void |
3450 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3451 | { |
b946845a | 3452 | kfree(volume_info->username); |
1bfe73c2 | 3453 | kzfree(volume_info->password); |
13589c43 SF |
3454 | if (volume_info->UNCip != volume_info->UNC + 2) |
3455 | kfree(volume_info->UNCip); | |
95c75454 | 3456 | kfree(volume_info->UNC); |
b946845a SF |
3457 | kfree(volume_info->domainname); |
3458 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3459 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3460 | } |
3461 | ||
3462 | void | |
3463 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3464 | { | |
3465 | if (!volume_info) | |
3466 | return; | |
3467 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3468 | kfree(volume_info); |
1bfe73c2 IM |
3469 | } |
3470 | ||
b9bce2e9 | 3471 | |
2d6d589d | 3472 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3473 | /* build_path_to_root returns full path to root when |
3474 | * we do not have an exiting connection (tcon) */ | |
3475 | static char * | |
b2a0fa15 | 3476 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3477 | const struct cifs_sb_info *cifs_sb) |
3478 | { | |
b2a0fa15 JL |
3479 | char *full_path, *pos; |
3480 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3481 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3482 | |
b2a0fa15 | 3483 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3484 | if (full_path == NULL) |
3485 | return ERR_PTR(-ENOMEM); | |
3486 | ||
b2a0fa15 JL |
3487 | strncpy(full_path, vol->UNC, unc_len); |
3488 | pos = full_path + unc_len; | |
3489 | ||
3490 | if (pplen) { | |
3491 | strncpy(pos, vol->prepath, pplen); | |
3492 | pos += pplen; | |
3493 | } | |
3494 | ||
3495 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3496 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3497 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3498 | return full_path; |
3499 | } | |
dd613945 SF |
3500 | |
3501 | /* | |
3502 | * Perform a dfs referral query for a share and (optionally) prefix | |
3503 | * | |
046462ab SF |
3504 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3505 | * to a string containing updated options for the submount. Otherwise it | |
3506 | * will be left untouched. | |
dd613945 SF |
3507 | * |
3508 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3509 | * determine whether there were referrals. | |
3510 | */ | |
3511 | static int | |
96daf2b0 | 3512 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
dd613945 | 3513 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3514 | int check_prefix) |
dd613945 SF |
3515 | { |
3516 | int rc; | |
3517 | unsigned int num_referrals = 0; | |
3518 | struct dfs_info3_param *referrals = NULL; | |
3519 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3520 | ||
3521 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3522 | if (IS_ERR(full_path)) | |
3523 | return PTR_ERR(full_path); | |
3524 | ||
3525 | /* For DFS paths, skip the first '\' of the UNC */ | |
3526 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3527 | ||
3528 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
3529 | &num_referrals, &referrals, | |
3530 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3531 | ||
3532 | if (!rc && num_referrals > 0) { | |
3533 | char *fake_devname = NULL; | |
3534 | ||
3535 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3536 | full_path + 1, referrals, | |
3537 | &fake_devname); | |
3538 | ||
3539 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3540 | |
dd613945 SF |
3541 | if (IS_ERR(mdata)) { |
3542 | rc = PTR_ERR(mdata); | |
3543 | mdata = NULL; | |
b9bce2e9 JL |
3544 | } else { |
3545 | cleanup_volume_info_contents(volume_info); | |
3546 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3547 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3548 | fake_devname); | |
dd613945 | 3549 | } |
b9bce2e9 JL |
3550 | kfree(fake_devname); |
3551 | kfree(cifs_sb->mountdata); | |
046462ab | 3552 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3553 | } |
3554 | kfree(full_path); | |
3555 | return rc; | |
3556 | } | |
2d6d589d | 3557 | #endif |
1bfe73c2 | 3558 | |
04db79b0 JL |
3559 | static int |
3560 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3561 | const char *devname) | |
1da177e4 | 3562 | { |
724d9f1c | 3563 | int rc = 0; |
1da177e4 | 3564 | |
04db79b0 JL |
3565 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3566 | return -EINVAL; | |
1da177e4 | 3567 | |
7586b765 | 3568 | if (volume_info->nullauth) { |
04febabc JL |
3569 | cFYI(1, "Anonymous login"); |
3570 | kfree(volume_info->username); | |
3571 | volume_info->username = NULL; | |
7586b765 | 3572 | } else if (volume_info->username) { |
1da177e4 | 3573 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3574 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3575 | } else { |
bf820679 | 3576 | cifserror("No username specified"); |
50c2f753 SF |
3577 | /* In userspace mount helper we can get user name from alternate |
3578 | locations such as env variables and files on disk */ | |
04db79b0 | 3579 | return -EINVAL; |
1da177e4 LT |
3580 | } |
3581 | ||
1da177e4 | 3582 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3583 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3584 | /* load_nls_default cannot return null */ |
3585 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3586 | } else { |
a5fc4ce0 JL |
3587 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3588 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3589 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3590 | volume_info->iocharset); | |
04db79b0 | 3591 | return -ELIBACC; |
1da177e4 LT |
3592 | } |
3593 | } | |
724d9f1c | 3594 | |
724d9f1c PS |
3595 | return rc; |
3596 | } | |
3597 | ||
04db79b0 JL |
3598 | struct smb_vol * |
3599 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3600 | { | |
3601 | int rc; | |
3602 | struct smb_vol *volume_info; | |
3603 | ||
3604 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3605 | if (!volume_info) | |
3606 | return ERR_PTR(-ENOMEM); | |
3607 | ||
3608 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3609 | if (rc) { | |
3610 | cifs_cleanup_volume_info(volume_info); | |
3611 | volume_info = ERR_PTR(rc); | |
3612 | } | |
3613 | ||
3614 | return volume_info; | |
3615 | } | |
3616 | ||
66bfaadc JL |
3617 | /* make sure ra_pages is a multiple of rsize */ |
3618 | static inline unsigned int | |
3619 | cifs_ra_pages(struct cifs_sb_info *cifs_sb) | |
3620 | { | |
3621 | unsigned int reads; | |
3622 | unsigned int rsize_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; | |
3623 | ||
3624 | if (rsize_pages >= default_backing_dev_info.ra_pages) | |
3625 | return default_backing_dev_info.ra_pages; | |
3626 | else if (rsize_pages == 0) | |
3627 | return rsize_pages; | |
3628 | ||
3629 | reads = default_backing_dev_info.ra_pages / rsize_pages; | |
3630 | return reads * rsize_pages; | |
3631 | } | |
3632 | ||
724d9f1c | 3633 | int |
2c6292ae | 3634 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3635 | { |
1daaae8f | 3636 | int rc; |
724d9f1c | 3637 | int xid; |
96daf2b0 SF |
3638 | struct cifs_ses *pSesInfo; |
3639 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3640 | struct TCP_Server_Info *srvTcp; |
3641 | char *full_path; | |
3642 | struct tcon_link *tlink; | |
3643 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3644 | int referral_walks_count = 0; | |
20547490 | 3645 | #endif |
dd854466 AV |
3646 | |
3647 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3648 | if (rc) | |
3649 | return rc; | |
3650 | ||
20547490 | 3651 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3652 | try_mount_again: |
3653 | /* cleanup activities if we're chasing a referral */ | |
3654 | if (referral_walks_count) { | |
3655 | if (tcon) | |
3656 | cifs_put_tcon(tcon); | |
3657 | else if (pSesInfo) | |
3658 | cifs_put_smb_ses(pSesInfo); | |
3659 | ||
724d9f1c PS |
3660 | FreeXid(xid); |
3661 | } | |
3662 | #endif | |
1daaae8f | 3663 | rc = 0; |
724d9f1c PS |
3664 | tcon = NULL; |
3665 | pSesInfo = NULL; | |
3666 | srvTcp = NULL; | |
3667 | full_path = NULL; | |
3668 | tlink = NULL; | |
3669 | ||
3670 | xid = GetXid(); | |
1da177e4 | 3671 | |
63c038c2 | 3672 | /* get a reference to a tcp session */ |
7586b765 | 3673 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3674 | if (IS_ERR(srvTcp)) { |
3675 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3676 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3677 | goto out; |
1da177e4 LT |
3678 | } |
3679 | ||
36988c76 JL |
3680 | /* get a reference to a SMB session */ |
3681 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3682 | if (IS_ERR(pSesInfo)) { | |
3683 | rc = PTR_ERR(pSesInfo); | |
3684 | pSesInfo = NULL; | |
3685 | goto mount_fail_check; | |
1da177e4 | 3686 | } |
50c2f753 | 3687 | |
d00c28de JL |
3688 | /* search for existing tcon to this server share */ |
3689 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3690 | if (IS_ERR(tcon)) { | |
3691 | rc = PTR_ERR(tcon); | |
3692 | tcon = NULL; | |
1bfe73c2 | 3693 | goto remote_path_check; |
d00c28de | 3694 | } |
1bfe73c2 | 3695 | |
d82c2df5 | 3696 | /* tell server which Unix caps we support */ |
6848b733 | 3697 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3698 | /* reset of caps checks mount to see if unix extensions |
3699 | disabled for just this mount */ | |
2c6292ae | 3700 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3701 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3702 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3703 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3704 | rc = -EACCES; | |
3705 | goto mount_fail_check; | |
3706 | } | |
3707 | } else | |
d82c2df5 | 3708 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3709 | |
6848b733 SF |
3710 | /* do not care if following two calls succeed - informational */ |
3711 | if (!tcon->ipc) { | |
3712 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3713 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3714 | } | |
3715 | ||
f7910cbd | 3716 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
5eba8ab3 | 3717 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
f7910cbd | 3718 | |
66bfaadc JL |
3719 | /* tune readahead according to rsize */ |
3720 | cifs_sb->bdi.ra_pages = cifs_ra_pages(cifs_sb); | |
f7910cbd | 3721 | |
1bfe73c2 | 3722 | remote_path_check: |
c1508ca2 SF |
3723 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3724 | /* | |
3725 | * Perform an unconditional check for whether there are DFS | |
3726 | * referrals for this path without prefix, to provide support | |
3727 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3728 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3729 | * Chase the referral if found, otherwise continue normally. | |
3730 | */ | |
3731 | if (referral_walks_count == 0) { | |
3732 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3733 | cifs_sb, false); |
c1508ca2 SF |
3734 | if (!refrc) { |
3735 | referral_walks_count++; | |
3736 | goto try_mount_again; | |
3737 | } | |
3738 | } | |
3739 | #endif | |
3740 | ||
f87d39d9 | 3741 | /* check if a whole path is not remote */ |
70945643 | 3742 | if (!rc && tcon) { |
e4cce94c | 3743 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3744 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3745 | if (full_path == NULL) { |
3746 | rc = -ENOMEM; | |
3747 | goto mount_fail_check; | |
3748 | } | |
3749 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3750 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3751 | kfree(full_path); |
3752 | goto mount_fail_check; | |
3753 | } | |
3754 | kfree(full_path); | |
3755 | } | |
3756 | ||
1bfe73c2 IM |
3757 | /* get referral if needed */ |
3758 | if (rc == -EREMOTE) { | |
d036f50f | 3759 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3760 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3761 | /* | |
3762 | * BB: when we implement proper loop detection, | |
3763 | * we will remove this check. But now we need it | |
3764 | * to prevent an indefinite loop if 'DFS tree' is | |
3765 | * misconfigured (i.e. has loops). | |
3766 | */ | |
3767 | rc = -ELOOP; | |
3768 | goto mount_fail_check; | |
3769 | } | |
1bfe73c2 | 3770 | |
dd613945 | 3771 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3772 | true); |
7b91e266 | 3773 | |
dd613945 | 3774 | if (!rc) { |
5c2503a8 | 3775 | referral_walks_count++; |
1bfe73c2 IM |
3776 | goto try_mount_again; |
3777 | } | |
dd613945 | 3778 | goto mount_fail_check; |
d036f50f SF |
3779 | #else /* No DFS support, return error on mount */ |
3780 | rc = -EOPNOTSUPP; | |
3781 | #endif | |
1bfe73c2 IM |
3782 | } |
3783 | ||
9d002df4 JL |
3784 | if (rc) |
3785 | goto mount_fail_check; | |
3786 | ||
3787 | /* now, hang the tcon off of the superblock */ | |
3788 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3789 | if (tlink == NULL) { | |
3790 | rc = -ENOMEM; | |
3791 | goto mount_fail_check; | |
3792 | } | |
3793 | ||
b647c35f | 3794 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3795 | tlink->tl_tcon = tcon; |
3796 | tlink->tl_time = jiffies; | |
3797 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3798 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3799 | ||
b647c35f | 3800 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3801 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3802 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3803 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3804 | |
da472fc8 | 3805 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3806 | TLINK_IDLE_EXPIRE); |
3807 | ||
1bfe73c2 IM |
3808 | mount_fail_check: |
3809 | /* on error free sesinfo and tcon struct if needed */ | |
3810 | if (rc) { | |
1bfe73c2 | 3811 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3812 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3813 | if (tcon) |
3814 | cifs_put_tcon(tcon); | |
3815 | else if (pSesInfo) | |
3816 | cifs_put_smb_ses(pSesInfo); | |
3817 | else | |
3818 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3819 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3820 | } |
3821 | ||
70fe7dc0 | 3822 | out: |
1da177e4 LT |
3823 | FreeXid(xid); |
3824 | return rc; | |
3825 | } | |
3826 | ||
8d1bca32 JL |
3827 | /* |
3828 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3829 | * pointer may be NULL. | |
3830 | */ | |
1da177e4 | 3831 | int |
96daf2b0 SF |
3832 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
3833 | const char *tree, struct cifs_tcon *tcon, | |
1da177e4 LT |
3834 | const struct nls_table *nls_codepage) |
3835 | { | |
3836 | struct smb_hdr *smb_buffer; | |
3837 | struct smb_hdr *smb_buffer_response; | |
3838 | TCONX_REQ *pSMB; | |
3839 | TCONX_RSP *pSMBr; | |
3840 | unsigned char *bcc_ptr; | |
3841 | int rc = 0; | |
690c522f JL |
3842 | int length; |
3843 | __u16 bytes_left, count; | |
1da177e4 LT |
3844 | |
3845 | if (ses == NULL) | |
3846 | return -EIO; | |
3847 | ||
3848 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3849 | if (smb_buffer == NULL) |
1da177e4 | 3850 | return -ENOMEM; |
ca43e3be | 3851 | |
1da177e4 LT |
3852 | smb_buffer_response = smb_buffer; |
3853 | ||
3854 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3855 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3856 | |
3857 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3858 | smb_buffer->Uid = ses->Suid; |
3859 | pSMB = (TCONX_REQ *) smb_buffer; | |
3860 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3861 | ||
3862 | pSMB->AndXCommand = 0xFF; | |
3863 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3864 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3865 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3866 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3867 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3868 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3869 | /* already aligned so no need to do it below */ |
eeac8047 | 3870 | } else { |
540b2e37 | 3871 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3872 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3873 | specified as required (when that support is added to | |
3874 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3875 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3876 | by Samba (not sure whether other servers allow |
3877 | NTLMv2 password here) */ | |
7c7b25bc | 3878 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3879 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3880 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3881 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3882 | ses->server->sec_mode & |
4e53a3fb JL |
3883 | SECMODE_PW_ENCRYPT ? true : false, |
3884 | bcc_ptr); | |
7c7b25bc SF |
3885 | else |
3886 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3887 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3888 | bcc_ptr, nls_codepage); |
eeac8047 | 3889 | |
540b2e37 | 3890 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3891 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3892 | /* must align unicode strings */ |
3893 | *bcc_ptr = 0; /* null byte password */ | |
3894 | bcc_ptr++; | |
3895 | } | |
eeac8047 | 3896 | } |
1da177e4 | 3897 | |
96daf2b0 | 3898 | if (ses->server->sec_mode & |
a878fb22 | 3899 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3900 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3901 | ||
3902 | if (ses->capabilities & CAP_STATUS32) { | |
3903 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3904 | } | |
3905 | if (ses->capabilities & CAP_DFS) { | |
3906 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3907 | } | |
3908 | if (ses->capabilities & CAP_UNICODE) { | |
3909 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3910 | length = | |
acbbb76a | 3911 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3912 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3913 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3914 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3915 | bcc_ptr += 2; /* skip trailing null */ |
3916 | } else { /* ASCII */ | |
1da177e4 LT |
3917 | strcpy(bcc_ptr, tree); |
3918 | bcc_ptr += strlen(tree) + 1; | |
3919 | } | |
3920 | strcpy(bcc_ptr, "?????"); | |
3921 | bcc_ptr += strlen("?????"); | |
3922 | bcc_ptr += 1; | |
3923 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3924 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3925 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3926 | pSMB->ByteCount = cpu_to_le16(count); |
3927 | ||
133672ef | 3928 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3929 | 0); |
1da177e4 | 3930 | |
1da177e4 LT |
3931 | /* above now done in SendReceive */ |
3932 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3933 | bool is_unicode; |
3934 | ||
1da177e4 | 3935 | tcon->tidStatus = CifsGood; |
3b795210 | 3936 | tcon->need_reconnect = false; |
1da177e4 LT |
3937 | tcon->tid = smb_buffer_response->Tid; |
3938 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3939 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3940 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3941 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3942 | is_unicode = true; | |
3943 | else | |
3944 | is_unicode = false; | |
3945 | ||
cc20c031 | 3946 | |
50c2f753 | 3947 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3948 | if (length == 3) { |
3949 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3950 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3951 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3952 | tcon->ipc = 1; |
3953 | } | |
3954 | } else if (length == 2) { | |
3955 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3956 | /* the most common case */ | |
b6b38f70 | 3957 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3958 | } |
3959 | } | |
50c2f753 | 3960 | bcc_ptr += length + 1; |
cc20c031 | 3961 | bytes_left -= (length + 1); |
1da177e4 | 3962 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3963 | |
3964 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3965 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3966 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3967 | bytes_left, is_unicode, |
cc20c031 JL |
3968 | nls_codepage); |
3969 | ||
b6b38f70 | 3970 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3971 | |
fb8c4b14 | 3972 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3973 | (smb_buffer_response->WordCount == 7)) |
3974 | /* field is in same location */ | |
3979877e SF |
3975 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3976 | else | |
3977 | tcon->Flags = 0; | |
b6b38f70 | 3978 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3979 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3980 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3981 | ses->ipc_tid = smb_buffer_response->Tid; |
3982 | } | |
3983 | ||
a8a11d39 | 3984 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3985 | return rc; |
3986 | } | |
3987 | ||
2a9b9951 AV |
3988 | void |
3989 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3990 | { |
b647c35f JL |
3991 | struct rb_root *root = &cifs_sb->tlink_tree; |
3992 | struct rb_node *node; | |
3993 | struct tcon_link *tlink; | |
9d002df4 | 3994 | |
2de970ff JL |
3995 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3996 | ||
b647c35f JL |
3997 | spin_lock(&cifs_sb->tlink_tree_lock); |
3998 | while ((node = rb_first(root))) { | |
3999 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4000 | cifs_get_tlink(tlink); | |
4001 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4002 | rb_erase(node, root); | |
1da177e4 | 4003 | |
b647c35f JL |
4004 | spin_unlock(&cifs_sb->tlink_tree_lock); |
4005 | cifs_put_tlink(tlink); | |
4006 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4007 | } | |
4008 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 4009 | |
dd854466 | 4010 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
4011 | kfree(cifs_sb->mountdata); |
4012 | unload_nls(cifs_sb->local_nls); | |
4013 | kfree(cifs_sb); | |
50c2f753 | 4014 | } |
1da177e4 | 4015 | |
96daf2b0 | 4016 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
1da177e4 LT |
4017 | { |
4018 | int rc = 0; | |
198b5682 | 4019 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 4020 | |
198b5682 JL |
4021 | /* only send once per connect */ |
4022 | if (server->maxBuf != 0) | |
4023 | return 0; | |
4024 | ||
2d86dbc9 | 4025 | cifs_set_credits(server, 1); |
198b5682 JL |
4026 | rc = CIFSSMBNegotiate(xid, ses); |
4027 | if (rc == -EAGAIN) { | |
4028 | /* retry only once on 1st time connection */ | |
2d86dbc9 | 4029 | cifs_set_credits(server, 1); |
198b5682 JL |
4030 | rc = CIFSSMBNegotiate(xid, ses); |
4031 | if (rc == -EAGAIN) | |
4032 | rc = -EHOSTDOWN; | |
1da177e4 | 4033 | } |
198b5682 JL |
4034 | if (rc == 0) { |
4035 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 4036 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
4037 | server->tcpStatus = CifsGood; |
4038 | else | |
4039 | rc = -EHOSTDOWN; | |
4040 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 4041 | |
198b5682 JL |
4042 | } |
4043 | ||
4044 | return rc; | |
4045 | } | |
4046 | ||
4047 | ||
96daf2b0 | 4048 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
198b5682 JL |
4049 | struct nls_table *nls_info) |
4050 | { | |
4051 | int rc = 0; | |
4052 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 4053 | |
198b5682 JL |
4054 | ses->flags = 0; |
4055 | ses->capabilities = server->capabilities; | |
26b994fa | 4056 | if (linuxExtEnabled == 0) |
198b5682 | 4057 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 4058 | |
b6b38f70 | 4059 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 4060 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 4061 | |
198b5682 | 4062 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 4063 | if (rc) { |
b6b38f70 | 4064 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 4065 | } else { |
5d0d2882 SP |
4066 | mutex_lock(&ses->server->srv_mutex); |
4067 | if (!server->session_estab) { | |
21e73393 | 4068 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 4069 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
4070 | server->sequence_number = 0x2; |
4071 | server->session_estab = true; | |
4072 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
4073 | } |
4074 | mutex_unlock(&server->srv_mutex); | |
4075 | ||
b6b38f70 | 4076 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 4077 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
4078 | ses->status = CifsGood; |
4079 | ses->need_reconnect = false; | |
20418acd | 4080 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 4081 | } |
26b994fa | 4082 | |
21e73393 SP |
4083 | kfree(ses->auth_key.response); |
4084 | ses->auth_key.response = NULL; | |
4085 | ses->auth_key.len = 0; | |
d3686d54 SP |
4086 | kfree(ses->ntlmssp); |
4087 | ses->ntlmssp = NULL; | |
21e73393 | 4088 | |
1da177e4 LT |
4089 | return rc; |
4090 | } | |
4091 | ||
8a8798a5 JL |
4092 | static int |
4093 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
4094 | { | |
4095 | switch (ses->server->secType) { | |
4096 | case Kerberos: | |
4097 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
4098 | return 0; | |
4099 | case NTLMv2: | |
4100 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
4101 | break; | |
4102 | case NTLM: | |
4103 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
4104 | break; | |
4105 | case RawNTLMSSP: | |
4106 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
4107 | break; | |
4108 | case LANMAN: | |
4109 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
4110 | break; | |
4111 | } | |
4112 | ||
4113 | return cifs_set_cifscreds(vol, ses); | |
4114 | } | |
4115 | ||
96daf2b0 | 4116 | static struct cifs_tcon * |
9d002df4 JL |
4117 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
4118 | { | |
8a8798a5 | 4119 | int rc; |
96daf2b0 SF |
4120 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
4121 | struct cifs_ses *ses; | |
4122 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 4123 | struct smb_vol *vol_info; |
9d002df4 JL |
4124 | |
4125 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
4126 | if (vol_info == NULL) |
4127 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 4128 | |
9d002df4 JL |
4129 | vol_info->local_nls = cifs_sb->local_nls; |
4130 | vol_info->linux_uid = fsuid; | |
4131 | vol_info->cred_uid = fsuid; | |
4132 | vol_info->UNC = master_tcon->treeName; | |
4133 | vol_info->retry = master_tcon->retry; | |
4134 | vol_info->nocase = master_tcon->nocase; | |
4135 | vol_info->local_lease = master_tcon->local_lease; | |
4136 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
4137 | ||
8a8798a5 JL |
4138 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
4139 | if (rc) { | |
4140 | tcon = ERR_PTR(rc); | |
4141 | goto out; | |
4142 | } | |
9d002df4 JL |
4143 | |
4144 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 4145 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 4146 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 4147 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
4148 | |
4149 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
4150 | if (IS_ERR(ses)) { | |
96daf2b0 | 4151 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
4152 | cifs_put_tcp_session(master_tcon->ses->server); |
4153 | goto out; | |
4154 | } | |
4155 | ||
4156 | tcon = cifs_get_tcon(ses, vol_info); | |
4157 | if (IS_ERR(tcon)) { | |
4158 | cifs_put_smb_ses(ses); | |
4159 | goto out; | |
4160 | } | |
4161 | ||
4162 | if (ses->capabilities & CAP_UNIX) | |
4163 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
4164 | out: | |
8a8798a5 JL |
4165 | kfree(vol_info->username); |
4166 | kfree(vol_info->password); | |
9d002df4 JL |
4167 | kfree(vol_info); |
4168 | ||
4169 | return tcon; | |
4170 | } | |
4171 | ||
96daf2b0 | 4172 | struct cifs_tcon * |
9d002df4 JL |
4173 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4174 | { | |
4175 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4176 | } | |
4177 | ||
4178 | static int | |
4179 | cifs_sb_tcon_pending_wait(void *unused) | |
4180 | { | |
4181 | schedule(); | |
4182 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
4183 | } | |
4184 | ||
b647c35f JL |
4185 | /* find and return a tlink with given uid */ |
4186 | static struct tcon_link * | |
4187 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
4188 | { | |
4189 | struct rb_node *node = root->rb_node; | |
4190 | struct tcon_link *tlink; | |
4191 | ||
4192 | while (node) { | |
4193 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4194 | ||
4195 | if (tlink->tl_uid > uid) | |
4196 | node = node->rb_left; | |
4197 | else if (tlink->tl_uid < uid) | |
4198 | node = node->rb_right; | |
4199 | else | |
4200 | return tlink; | |
4201 | } | |
4202 | return NULL; | |
4203 | } | |
4204 | ||
4205 | /* insert a tcon_link into the tree */ | |
4206 | static void | |
4207 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4208 | { | |
4209 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4210 | struct tcon_link *tlink; | |
4211 | ||
4212 | while (*new) { | |
4213 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4214 | parent = *new; | |
4215 | ||
4216 | if (tlink->tl_uid > new_tlink->tl_uid) | |
4217 | new = &((*new)->rb_left); | |
4218 | else | |
4219 | new = &((*new)->rb_right); | |
4220 | } | |
4221 | ||
4222 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4223 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4224 | } | |
4225 | ||
9d002df4 JL |
4226 | /* |
4227 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4228 | * current task. | |
4229 | * | |
4230 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4231 | * the master tcon for the mount. | |
4232 | * | |
6ef933a3 | 4233 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4234 | * exists, then check to see if it's pending construction. If it is then wait |
4235 | * for construction to complete. Once it's no longer pending, check to see if | |
4236 | * it failed and either return an error or retry construction, depending on | |
4237 | * the timeout. | |
4238 | * | |
4239 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4240 | * try to construct a new one. | |
4241 | */ | |
4242 | struct tcon_link * | |
4243 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4244 | { | |
4245 | int ret; | |
b647c35f | 4246 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
4247 | struct tcon_link *tlink, *newtlink; |
4248 | ||
4249 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4250 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4251 | ||
4252 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4253 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4254 | if (tlink) |
4255 | cifs_get_tlink(tlink); | |
4256 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4257 | ||
4258 | if (tlink == NULL) { | |
4259 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4260 | if (newtlink == NULL) | |
4261 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4262 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4263 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4264 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4265 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4266 | cifs_get_tlink(newtlink); | |
4267 | ||
9d002df4 JL |
4268 | spin_lock(&cifs_sb->tlink_tree_lock); |
4269 | /* was one inserted after previous search? */ | |
b647c35f | 4270 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4271 | if (tlink) { |
4272 | cifs_get_tlink(tlink); | |
4273 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4274 | kfree(newtlink); |
4275 | goto wait_for_construction; | |
4276 | } | |
9d002df4 | 4277 | tlink = newtlink; |
b647c35f JL |
4278 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4279 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4280 | } else { |
4281 | wait_for_construction: | |
4282 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4283 | cifs_sb_tcon_pending_wait, | |
4284 | TASK_INTERRUPTIBLE); | |
4285 | if (ret) { | |
4286 | cifs_put_tlink(tlink); | |
4287 | return ERR_PTR(ret); | |
4288 | } | |
4289 | ||
4290 | /* if it's good, return it */ | |
4291 | if (!IS_ERR(tlink->tl_tcon)) | |
4292 | return tlink; | |
4293 | ||
4294 | /* return error if we tried this already recently */ | |
4295 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4296 | cifs_put_tlink(tlink); | |
4297 | return ERR_PTR(-EACCES); | |
4298 | } | |
4299 | ||
4300 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4301 | goto wait_for_construction; | |
4302 | } | |
4303 | ||
4304 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4305 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4306 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4307 | ||
4308 | if (IS_ERR(tlink->tl_tcon)) { | |
4309 | cifs_put_tlink(tlink); | |
4310 | return ERR_PTR(-EACCES); | |
4311 | } | |
4312 | ||
4313 | return tlink; | |
4314 | } | |
2de970ff JL |
4315 | |
4316 | /* | |
4317 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4318 | * out tcons. | |
4319 | */ | |
4320 | static void | |
4321 | cifs_prune_tlinks(struct work_struct *work) | |
4322 | { | |
4323 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4324 | prune_tlinks.work); | |
b647c35f JL |
4325 | struct rb_root *root = &cifs_sb->tlink_tree; |
4326 | struct rb_node *node = rb_first(root); | |
4327 | struct rb_node *tmp; | |
4328 | struct tcon_link *tlink; | |
2de970ff | 4329 | |
b647c35f JL |
4330 | /* |
4331 | * Because we drop the spinlock in the loop in order to put the tlink | |
4332 | * it's not guarded against removal of links from the tree. The only | |
4333 | * places that remove entries from the tree are this function and | |
4334 | * umounts. Because this function is non-reentrant and is canceled | |
4335 | * before umount can proceed, this is safe. | |
4336 | */ | |
4337 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4338 | node = rb_first(root); | |
4339 | while (node != NULL) { | |
4340 | tmp = node; | |
4341 | node = rb_next(tmp); | |
4342 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4343 | ||
4344 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4345 | atomic_read(&tlink->tl_count) != 0 || | |
4346 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4347 | continue; | |
2de970ff | 4348 | |
b647c35f JL |
4349 | cifs_get_tlink(tlink); |
4350 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4351 | rb_erase(tmp, root); | |
4352 | ||
4353 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4354 | cifs_put_tlink(tlink); | |
4355 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4356 | } | |
4357 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4358 | |
da472fc8 | 4359 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4360 | TLINK_IDLE_EXPIRE); |
4361 | } |