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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
1080ef75 | 4 | * Copyright (C) International Business Machines Corp., 2002,2011 |
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> | |
dc920277 | 24 | #include <linux/sched/mm.h> |
3f07c014 | 25 | #include <linux/sched/signal.h> |
1da177e4 LT |
26 | #include <linux/list.h> |
27 | #include <linux/wait.h> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 LT |
29 | #include <linux/pagemap.h> |
30 | #include <linux/ctype.h> | |
31 | #include <linux/utsname.h> | |
32 | #include <linux/mempool.h> | |
b8643e1b | 33 | #include <linux/delay.h> |
f191401f | 34 | #include <linux/completion.h> |
aaf737ad | 35 | #include <linux/kthread.h> |
0ae0efad | 36 | #include <linux/pagevec.h> |
7dfb7103 | 37 | #include <linux/freezer.h> |
5c2503a8 | 38 | #include <linux/namei.h> |
c6e970a0 | 39 | #include <linux/uuid.h> |
7c0f6ba6 | 40 | #include <linux/uaccess.h> |
1da177e4 | 41 | #include <asm/processor.h> |
50b64e3b | 42 | #include <linux/inet.h> |
143cb494 | 43 | #include <linux/module.h> |
8a8798a5 | 44 | #include <keys/user-type.h> |
0e2bedaa | 45 | #include <net/ipv6.h> |
8830d7e0 | 46 | #include <linux/parser.h> |
2f8b5444 | 47 | #include <linux/bvec.h> |
1da177e4 LT |
48 | #include "cifspdu.h" |
49 | #include "cifsglob.h" | |
50 | #include "cifsproto.h" | |
51 | #include "cifs_unicode.h" | |
52 | #include "cifs_debug.h" | |
53 | #include "cifs_fs_sb.h" | |
54 | #include "ntlmssp.h" | |
55 | #include "nterr.h" | |
56 | #include "rfc1002pdu.h" | |
488f1d2d | 57 | #include "fscache.h" |
53e0e11e | 58 | #include "smb2proto.h" |
2f894646 | 59 | #include "smbdirect.h" |
1c780228 PA |
60 | #include "dns_resolve.h" |
61 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
62 | #include "dfs_cache.h" | |
63 | #endif | |
1da177e4 | 64 | |
1da177e4 | 65 | extern mempool_t *cifs_req_poolp; |
f92a720e | 66 | extern bool disable_legacy_dialects; |
1da177e4 | 67 | |
2de970ff | 68 | /* FIXME: should these be tunable? */ |
9d002df4 | 69 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 70 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 71 | |
8830d7e0 | 72 | enum { |
8830d7e0 SP |
73 | /* Mount options that take no arguments */ |
74 | Opt_user_xattr, Opt_nouser_xattr, | |
75 | Opt_forceuid, Opt_noforceuid, | |
72bd481f | 76 | Opt_forcegid, Opt_noforcegid, |
3e7a02d4 | 77 | Opt_noblocksend, Opt_noautotune, Opt_nolease, |
8830d7e0 | 78 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, |
2baa2682 | 79 | Opt_mapposix, Opt_nomapposix, |
8830d7e0 SP |
80 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
81 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
b326614e | 82 | Opt_noposixpaths, Opt_nounix, Opt_unix, |
8830d7e0 SP |
83 | Opt_nocase, |
84 | Opt_brl, Opt_nobrl, | |
3d4ef9a1 | 85 | Opt_handlecache, Opt_nohandlecache, |
95932655 | 86 | Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids, |
8830d7e0 SP |
87 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
88 | Opt_nohard, Opt_nosoft, | |
89 | Opt_nointr, Opt_intr, | |
90 | Opt_nostrictsync, Opt_strictsync, | |
91 | Opt_serverino, Opt_noserverino, | |
92 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
93 | Opt_acl, Opt_noacl, Opt_locallease, | |
4f5c10f1 | 94 | Opt_sign, Opt_ignore_signature, Opt_seal, Opt_noac, |
8830d7e0 | 95 | Opt_fsc, Opt_mfsymlinks, |
a0b3df5c | 96 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
b2a30774 | 97 | Opt_persistent, Opt_nopersistent, |
592fafe6 | 98 | Opt_resilient, Opt_noresilient, |
8eecd1c2 | 99 | Opt_domainauto, Opt_rdma, Opt_modesid, Opt_rootfs, |
bcc88801 | 100 | Opt_multichannel, Opt_nomultichannel, |
9fe5ff1c | 101 | Opt_compress, |
8830d7e0 SP |
102 | |
103 | /* Mount options which take numeric value */ | |
104 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
105 | Opt_cruid, Opt_gid, Opt_file_mode, | |
106 | Opt_dirmode, Opt_port, | |
563317ec | 107 | Opt_min_enc_offload, |
e8506d25 | 108 | Opt_blocksize, Opt_rsize, Opt_wsize, Opt_actimeo, |
ca567eb2 | 109 | Opt_echo_interval, Opt_max_credits, Opt_handletimeout, |
bcc88801 | 110 | Opt_snapshot, Opt_max_channels, |
8830d7e0 SP |
111 | |
112 | /* Mount options which take string value */ | |
113 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 114 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 115 | Opt_netbiosname, Opt_servern, |
23db65f5 | 116 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
117 | |
118 | /* Mount options to be ignored */ | |
119 | Opt_ignore, | |
120 | ||
121 | /* Options which could be blank */ | |
122 | Opt_blank_pass, | |
4fe9e963 SP |
123 | Opt_blank_user, |
124 | Opt_blank_ip, | |
8830d7e0 SP |
125 | |
126 | Opt_err | |
127 | }; | |
128 | ||
129 | static const match_table_t cifs_mount_option_tokens = { | |
130 | ||
131 | { Opt_user_xattr, "user_xattr" }, | |
132 | { Opt_nouser_xattr, "nouser_xattr" }, | |
133 | { Opt_forceuid, "forceuid" }, | |
134 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
135 | { Opt_forcegid, "forcegid" }, |
136 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
137 | { Opt_noblocksend, "noblocksend" }, |
138 | { Opt_noautotune, "noautotune" }, | |
3e7a02d4 | 139 | { Opt_nolease, "nolease" }, |
8830d7e0 SP |
140 | { Opt_hard, "hard" }, |
141 | { Opt_soft, "soft" }, | |
142 | { Opt_perm, "perm" }, | |
143 | { Opt_noperm, "noperm" }, | |
2baa2682 | 144 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 145 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
146 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
147 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
148 | { Opt_sfu, "sfu" }, |
149 | { Opt_nosfu, "nosfu" }, | |
150 | { Opt_nodfs, "nodfs" }, | |
151 | { Opt_posixpaths, "posixpaths" }, | |
152 | { Opt_noposixpaths, "noposixpaths" }, | |
153 | { Opt_nounix, "nounix" }, | |
154 | { Opt_nounix, "nolinux" }, | |
b326614e SF |
155 | { Opt_nounix, "noposix" }, |
156 | { Opt_unix, "unix" }, | |
157 | { Opt_unix, "linux" }, | |
158 | { Opt_unix, "posix" }, | |
8830d7e0 SP |
159 | { Opt_nocase, "nocase" }, |
160 | { Opt_nocase, "ignorecase" }, | |
161 | { Opt_brl, "brl" }, | |
162 | { Opt_nobrl, "nobrl" }, | |
3d4ef9a1 SF |
163 | { Opt_handlecache, "handlecache" }, |
164 | { Opt_nohandlecache, "nohandlecache" }, | |
8830d7e0 SP |
165 | { Opt_nobrl, "nolock" }, |
166 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 167 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
168 | { Opt_setuids, "setuids" }, |
169 | { Opt_nosetuids, "nosetuids" }, | |
95932655 | 170 | { Opt_setuidfromacl, "idsfromsid" }, |
8830d7e0 SP |
171 | { Opt_dynperm, "dynperm" }, |
172 | { Opt_nodynperm, "nodynperm" }, | |
173 | { Opt_nohard, "nohard" }, | |
174 | { Opt_nosoft, "nosoft" }, | |
175 | { Opt_nointr, "nointr" }, | |
176 | { Opt_intr, "intr" }, | |
177 | { Opt_nostrictsync, "nostrictsync" }, | |
178 | { Opt_strictsync, "strictsync" }, | |
179 | { Opt_serverino, "serverino" }, | |
180 | { Opt_noserverino, "noserverino" }, | |
181 | { Opt_rwpidforward, "rwpidforward" }, | |
412094a8 | 182 | { Opt_modesid, "modefromsid" }, |
8830d7e0 SP |
183 | { Opt_cifsacl, "cifsacl" }, |
184 | { Opt_nocifsacl, "nocifsacl" }, | |
185 | { Opt_acl, "acl" }, | |
186 | { Opt_noacl, "noacl" }, | |
187 | { Opt_locallease, "locallease" }, | |
188 | { Opt_sign, "sign" }, | |
4f5c10f1 | 189 | { Opt_ignore_signature, "signloosely" }, |
8830d7e0 | 190 | { Opt_seal, "seal" }, |
8830d7e0 SP |
191 | { Opt_noac, "noac" }, |
192 | { Opt_fsc, "fsc" }, | |
193 | { Opt_mfsymlinks, "mfsymlinks" }, | |
194 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 195 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 196 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
197 | { Opt_persistent, "persistenthandles"}, |
198 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
199 | { Opt_resilient, "resilienthandles"}, |
200 | { Opt_noresilient, "noresilienthandles"}, | |
39566443 | 201 | { Opt_domainauto, "domainauto"}, |
8339dd32 | 202 | { Opt_rdma, "rdma"}, |
bcc88801 AA |
203 | { Opt_multichannel, "multichannel" }, |
204 | { Opt_nomultichannel, "nomultichannel" }, | |
8830d7e0 SP |
205 | |
206 | { Opt_backupuid, "backupuid=%s" }, | |
207 | { Opt_backupgid, "backupgid=%s" }, | |
208 | { Opt_uid, "uid=%s" }, | |
209 | { Opt_cruid, "cruid=%s" }, | |
210 | { Opt_gid, "gid=%s" }, | |
211 | { Opt_file_mode, "file_mode=%s" }, | |
212 | { Opt_dirmode, "dirmode=%s" }, | |
213 | { Opt_dirmode, "dir_mode=%s" }, | |
214 | { Opt_port, "port=%s" }, | |
563317ec | 215 | { Opt_min_enc_offload, "esize=%s" }, |
e8506d25 | 216 | { Opt_blocksize, "bsize=%s" }, |
8830d7e0 SP |
217 | { Opt_rsize, "rsize=%s" }, |
218 | { Opt_wsize, "wsize=%s" }, | |
219 | { Opt_actimeo, "actimeo=%s" }, | |
ca567eb2 | 220 | { Opt_handletimeout, "handletimeout=%s" }, |
adfeb3e0 | 221 | { Opt_echo_interval, "echo_interval=%s" }, |
141891f4 | 222 | { Opt_max_credits, "max_credits=%s" }, |
8b217fe7 | 223 | { Opt_snapshot, "snapshot=%s" }, |
bcc88801 | 224 | { Opt_max_channels, "max_channels=%s" }, |
9fe5ff1c | 225 | { Opt_compress, "compress=%s" }, |
8830d7e0 | 226 | |
4fe9e963 SP |
227 | { Opt_blank_user, "user=" }, |
228 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
229 | { Opt_user, "user=%s" }, |
230 | { Opt_user, "username=%s" }, | |
231 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 232 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
233 | { Opt_pass, "pass=%s" }, |
234 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
235 | { Opt_blank_ip, "ip=" }, |
236 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
237 | { Opt_ip, "ip=%s" }, |
238 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
239 | { Opt_ignore, "unc=%s" }, |
240 | { Opt_ignore, "target=%s" }, | |
241 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
242 | { Opt_domain, "dom=%s" }, |
243 | { Opt_domain, "domain=%s" }, | |
244 | { Opt_domain, "workgroup=%s" }, | |
245 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 246 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 247 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
248 | { Opt_netbiosname, "netbiosname=%s" }, |
249 | { Opt_servern, "servern=%s" }, | |
250 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 251 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 252 | { Opt_sec, "sec=%s" }, |
15b6a473 | 253 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
254 | |
255 | { Opt_ignore, "cred" }, | |
256 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
257 | { Opt_ignore, "cred=%s" }, |
258 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
259 | { Opt_ignore, "guest" }, |
260 | { Opt_ignore, "rw" }, | |
261 | { Opt_ignore, "ro" }, | |
262 | { Opt_ignore, "suid" }, | |
263 | { Opt_ignore, "nosuid" }, | |
264 | { Opt_ignore, "exec" }, | |
265 | { Opt_ignore, "noexec" }, | |
266 | { Opt_ignore, "nodev" }, | |
267 | { Opt_ignore, "noauto" }, | |
268 | { Opt_ignore, "dev" }, | |
269 | { Opt_ignore, "mand" }, | |
270 | { Opt_ignore, "nomand" }, | |
9b9c5bea | 271 | { Opt_ignore, "relatime" }, |
8830d7e0 | 272 | { Opt_ignore, "_netdev" }, |
8eecd1c2 | 273 | { Opt_rootfs, "rootfs" }, |
8830d7e0 SP |
274 | |
275 | { Opt_err, NULL } | |
276 | }; | |
277 | ||
278 | enum { | |
279 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
280 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
281 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
282 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
283 | Opt_sec_none, |
284 | ||
285 | Opt_sec_err | |
286 | }; | |
287 | ||
288 | static const match_table_t cifs_secflavor_tokens = { | |
289 | { Opt_sec_krb5, "krb5" }, | |
290 | { Opt_sec_krb5i, "krb5i" }, | |
291 | { Opt_sec_krb5p, "krb5p" }, | |
292 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
293 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
294 | { Opt_ntlm, "ntlm" }, | |
295 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
296 | { Opt_sec_ntlmv2, "nontlm" }, |
297 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 298 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
299 | { Opt_sec_lanman, "lanman" }, |
300 | { Opt_sec_none, "none" }, | |
301 | ||
302 | { Opt_sec_err, NULL } | |
303 | }; | |
304 | ||
15b6a473 JL |
305 | /* cache flavors */ |
306 | enum { | |
307 | Opt_cache_loose, | |
308 | Opt_cache_strict, | |
309 | Opt_cache_none, | |
83bbfa70 | 310 | Opt_cache_ro, |
41e033fe | 311 | Opt_cache_rw, |
15b6a473 JL |
312 | Opt_cache_err |
313 | }; | |
314 | ||
315 | static const match_table_t cifs_cacheflavor_tokens = { | |
316 | { Opt_cache_loose, "loose" }, | |
317 | { Opt_cache_strict, "strict" }, | |
318 | { Opt_cache_none, "none" }, | |
83bbfa70 | 319 | { Opt_cache_ro, "ro" }, |
41e033fe | 320 | { Opt_cache_rw, "singleclient" }, |
15b6a473 JL |
321 | { Opt_cache_err, NULL } |
322 | }; | |
323 | ||
23db65f5 JL |
324 | static const match_table_t cifs_smb_version_tokens = { |
325 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 326 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 327 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 328 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 329 | { Smb_302, SMB302_VERSION_STRING }, |
4a3b38ae | 330 | { Smb_302, ALT_SMB302_VERSION_STRING }, |
5f7fbf73 | 331 | { Smb_311, SMB311_VERSION_STRING }, |
aab1893d | 332 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
9764c02f SF |
333 | { Smb_3any, SMB3ANY_VERSION_STRING }, |
334 | { Smb_default, SMBDEFAULT_VERSION_STRING }, | |
5f7fbf73 | 335 | { Smb_version_err, NULL } |
23db65f5 JL |
336 | }; |
337 | ||
a9f1b85e PS |
338 | static int ip_connect(struct TCP_Server_Info *server); |
339 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 340 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 341 | static void cifs_prune_tlinks(struct work_struct *work); |
93d5cb51 PA |
342 | static char *extract_hostname(const char *unc); |
343 | ||
28eb24ff PA |
344 | /* |
345 | * Resolve hostname and set ip addr in tcp ses. Useful for hostnames that may | |
346 | * get their ip addresses changed at some point. | |
347 | * | |
348 | * This should be called with server->srv_mutex held. | |
349 | */ | |
350 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
351 | static int reconn_set_ipaddr(struct TCP_Server_Info *server) | |
352 | { | |
353 | int rc; | |
354 | int len; | |
355 | char *unc, *ipaddr = NULL; | |
356 | ||
357 | if (!server->hostname) | |
358 | return -EINVAL; | |
359 | ||
360 | len = strlen(server->hostname) + 3; | |
361 | ||
362 | unc = kmalloc(len, GFP_KERNEL); | |
363 | if (!unc) { | |
364 | cifs_dbg(FYI, "%s: failed to create UNC path\n", __func__); | |
365 | return -ENOMEM; | |
366 | } | |
74ea5f98 | 367 | scnprintf(unc, len, "\\\\%s", server->hostname); |
28eb24ff PA |
368 | |
369 | rc = dns_resolve_server_name_to_ip(unc, &ipaddr); | |
370 | kfree(unc); | |
371 | ||
372 | if (rc < 0) { | |
373 | cifs_dbg(FYI, "%s: failed to resolve server part of %s to IP: %d\n", | |
374 | __func__, server->hostname, rc); | |
375 | return rc; | |
376 | } | |
377 | ||
fada37f6 | 378 | spin_lock(&cifs_tcp_ses_lock); |
28eb24ff PA |
379 | rc = cifs_convert_address((struct sockaddr *)&server->dstaddr, ipaddr, |
380 | strlen(ipaddr)); | |
fada37f6 | 381 | spin_unlock(&cifs_tcp_ses_lock); |
28eb24ff PA |
382 | kfree(ipaddr); |
383 | ||
384 | return !rc ? -1 : 0; | |
385 | } | |
386 | #else | |
387 | static inline int reconn_set_ipaddr(struct TCP_Server_Info *server) | |
388 | { | |
389 | return 0; | |
390 | } | |
391 | #endif | |
392 | ||
93d5cb51 | 393 | #ifdef CONFIG_CIFS_DFS_UPCALL |
93d5cb51 | 394 | /* These functions must be called with server->srv_mutex held */ |
93d5cb51 PA |
395 | static void reconn_inval_dfs_target(struct TCP_Server_Info *server, |
396 | struct cifs_sb_info *cifs_sb, | |
397 | struct dfs_cache_tgt_list *tgt_list, | |
398 | struct dfs_cache_tgt_iterator **tgt_it) | |
399 | { | |
400 | const char *name; | |
93d5cb51 PA |
401 | |
402 | if (!cifs_sb || !cifs_sb->origin_fullpath || !tgt_list || | |
403 | !server->nr_targets) | |
404 | return; | |
405 | ||
406 | if (!*tgt_it) { | |
407 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
408 | } else { | |
409 | *tgt_it = dfs_cache_get_next_tgt(tgt_list, *tgt_it); | |
410 | if (!*tgt_it) | |
411 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
412 | } | |
413 | ||
414 | cifs_dbg(FYI, "%s: UNC: %s\n", __func__, cifs_sb->origin_fullpath); | |
415 | ||
416 | name = dfs_cache_get_tgt_name(*tgt_it); | |
417 | ||
418 | kfree(server->hostname); | |
419 | ||
420 | server->hostname = extract_hostname(name); | |
8428817d DC |
421 | if (IS_ERR(server->hostname)) { |
422 | cifs_dbg(FYI, | |
423 | "%s: failed to extract hostname from target: %ld\n", | |
424 | __func__, PTR_ERR(server->hostname)); | |
93d5cb51 PA |
425 | } |
426 | } | |
427 | ||
428 | static inline int reconn_setup_dfs_targets(struct cifs_sb_info *cifs_sb, | |
429 | struct dfs_cache_tgt_list *tl, | |
430 | struct dfs_cache_tgt_iterator **it) | |
431 | { | |
432 | if (!cifs_sb->origin_fullpath) | |
433 | return -EOPNOTSUPP; | |
434 | return dfs_cache_noreq_find(cifs_sb->origin_fullpath + 1, NULL, tl); | |
435 | } | |
436 | #endif | |
1da177e4 | 437 | |
d5c5605c JL |
438 | /* |
439 | * cifs tcp session reconnection | |
440 | * | |
441 | * mark tcp session as reconnecting so temporarily locked | |
442 | * mark all smb sessions as reconnecting for tcp session | |
443 | * reconnect tcp session | |
444 | * wake up waiters on reconnection? - (not needed currently) | |
445 | */ | |
28ea5290 | 446 | int |
1da177e4 LT |
447 | cifs_reconnect(struct TCP_Server_Info *server) |
448 | { | |
449 | int rc = 0; | |
f1987b44 | 450 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
451 | struct cifs_ses *ses; |
452 | struct cifs_tcon *tcon; | |
fb8c4b14 | 453 | struct mid_q_entry *mid_entry; |
3c1105df | 454 | struct list_head retry_list; |
93d5cb51 | 455 | #ifdef CONFIG_CIFS_DFS_UPCALL |
8354d88e | 456 | struct super_block *sb = NULL; |
23324407 PA |
457 | struct cifs_sb_info *cifs_sb = NULL; |
458 | struct dfs_cache_tgt_list tgt_list = {0}; | |
93d5cb51 PA |
459 | struct dfs_cache_tgt_iterator *tgt_it = NULL; |
460 | #endif | |
50c2f753 | 461 | |
1da177e4 | 462 | spin_lock(&GlobalMid_Lock); |
93d5cb51 PA |
463 | server->nr_targets = 1; |
464 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
61cabc7b | 465 | spin_unlock(&GlobalMid_Lock); |
bacd704a | 466 | sb = cifs_get_tcp_super(server); |
8354d88e PAS |
467 | if (IS_ERR(sb)) { |
468 | rc = PTR_ERR(sb); | |
93d5cb51 PA |
469 | cifs_dbg(FYI, "%s: will not do DFS failover: rc = %d\n", |
470 | __func__, rc); | |
8354d88e | 471 | sb = NULL; |
93d5cb51 | 472 | } else { |
8354d88e PAS |
473 | cifs_sb = CIFS_SB(sb); |
474 | ||
93d5cb51 | 475 | rc = reconn_setup_dfs_targets(cifs_sb, &tgt_list, &tgt_it); |
55a7f006 | 476 | if (rc && (rc != -EOPNOTSUPP)) { |
afe6f653 | 477 | cifs_server_dbg(VFS, "%s: no target servers for DFS failover\n", |
93d5cb51 PA |
478 | __func__); |
479 | } else { | |
480 | server->nr_targets = dfs_cache_get_nr_tgts(&tgt_list); | |
481 | } | |
482 | } | |
483 | cifs_dbg(FYI, "%s: will retry %d target(s)\n", __func__, | |
484 | server->nr_targets); | |
61cabc7b | 485 | spin_lock(&GlobalMid_Lock); |
93d5cb51 | 486 | #endif |
469ee614 | 487 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 488 | /* the demux thread will exit normally |
1da177e4 LT |
489 | next time through the loop */ |
490 | spin_unlock(&GlobalMid_Lock); | |
8354d88e PAS |
491 | #ifdef CONFIG_CIFS_DFS_UPCALL |
492 | dfs_cache_free_tgts(&tgt_list); | |
bacd704a | 493 | cifs_put_tcp_super(sb); |
8354d88e | 494 | #endif |
e2e87519 | 495 | wake_up(&server->response_q); |
1da177e4 LT |
496 | return rc; |
497 | } else | |
498 | server->tcpStatus = CifsNeedReconnect; | |
499 | spin_unlock(&GlobalMid_Lock); | |
500 | server->maxBuf = 0; | |
aa24d1e9 | 501 | server->max_read = 0; |
1da177e4 | 502 | |
6e4d3bbe | 503 | cifs_dbg(FYI, "Mark tcp session as need reconnect\n"); |
bf1fdeb7 | 504 | trace_smb3_reconnect(server->CurrentMid, server->hostname); |
1da177e4 LT |
505 | |
506 | /* before reconnecting the tcp session, mark the smb session (uid) | |
507 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
508 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
509 | __func__); | |
3f9bcca7 | 510 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 511 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 512 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d | 513 | ses->need_reconnect = true; |
f1987b44 | 514 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 515 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 516 | tcon->need_reconnect = true; |
1da177e4 | 517 | } |
b327a717 AA |
518 | if (ses->tcon_ipc) |
519 | ses->tcon_ipc->need_reconnect = true; | |
1da177e4 | 520 | } |
3f9bcca7 | 521 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 522 | |
1da177e4 | 523 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 524 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 525 | mutex_lock(&server->srv_mutex); |
1d2a4f57 LL |
526 | if (server->ssocket) { |
527 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", | |
528 | server->ssocket->state, server->ssocket->flags); | |
529 | kernel_sock_shutdown(server->ssocket, SHUT_WR); | |
530 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", | |
531 | server->ssocket->state, server->ssocket->flags); | |
532 | sock_release(server->ssocket); | |
533 | server->ssocket = NULL; | |
534 | } | |
535 | server->sequence_number = 0; | |
536 | server->session_estab = false; | |
537 | kfree(server->session_key.response); | |
538 | server->session_key.response = NULL; | |
539 | server->session_key.len = 0; | |
540 | server->lstrp = jiffies; | |
1da177e4 | 541 | |
2b84a36c | 542 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 543 | INIT_LIST_HEAD(&retry_list); |
f96637be | 544 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 545 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
546 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
547 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
abe57073 | 548 | kref_get(&mid_entry->refcount); |
7c9421e1 PS |
549 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
550 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df | 551 | list_move(&mid_entry->qhead, &retry_list); |
abe57073 | 552 | mid_entry->mid_flags |= MID_DELETED; |
3c1105df JL |
553 | } |
554 | spin_unlock(&GlobalMid_Lock); | |
1d2a4f57 | 555 | mutex_unlock(&server->srv_mutex); |
3c1105df | 556 | |
f96637be | 557 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
558 | list_for_each_safe(tmp, tmp2, &retry_list) { |
559 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
560 | list_del_init(&mid_entry->qhead); |
561 | mid_entry->callback(mid_entry); | |
abe57073 | 562 | cifs_mid_q_entry_release(mid_entry); |
1da177e4 | 563 | } |
1da177e4 | 564 | |
1d2a4f57 LL |
565 | if (cifs_rdma_enabled(server)) { |
566 | mutex_lock(&server->srv_mutex); | |
214bab44 | 567 | smbd_destroy(server); |
1d2a4f57 LL |
568 | mutex_unlock(&server->srv_mutex); |
569 | } | |
214bab44 | 570 | |
7fdbaa1b | 571 | do { |
6c3d8909 | 572 | try_to_freeze(); |
a9f1b85e | 573 | |
73e216a8 | 574 | mutex_lock(&server->srv_mutex); |
93d5cb51 PA |
575 | /* |
576 | * Set up next DFS target server (if any) for reconnect. If DFS | |
577 | * feature is disabled, then we will retry last server we | |
578 | * connected to before. | |
579 | */ | |
781a8050 LL |
580 | if (cifs_rdma_enabled(server)) |
581 | rc = smbd_reconnect(server); | |
582 | else | |
583 | rc = generic_ip_connect(server); | |
fb8c4b14 | 584 | if (rc) { |
f96637be | 585 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
93d5cb51 PA |
586 | #ifdef CONFIG_CIFS_DFS_UPCALL |
587 | reconn_inval_dfs_target(server, cifs_sb, &tgt_list, | |
588 | &tgt_it); | |
589 | #endif | |
28eb24ff PA |
590 | rc = reconn_set_ipaddr(server); |
591 | if (rc) { | |
592 | cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n", | |
593 | __func__, rc); | |
594 | } | |
4afe260b | 595 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 596 | msleep(3000); |
1da177e4 LT |
597 | } else { |
598 | atomic_inc(&tcpSesReconnectCount); | |
335b7b62 | 599 | set_credits(server, 1); |
1da177e4 | 600 | spin_lock(&GlobalMid_Lock); |
469ee614 | 601 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 602 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 603 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 604 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 605 | } |
7fdbaa1b | 606 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 607 | |
93d5cb51 PA |
608 | #ifdef CONFIG_CIFS_DFS_UPCALL |
609 | if (tgt_it) { | |
610 | rc = dfs_cache_noreq_update_tgthint(cifs_sb->origin_fullpath + 1, | |
611 | tgt_it); | |
612 | if (rc) { | |
afe6f653 | 613 | cifs_server_dbg(VFS, "%s: failed to update DFS target hint: rc = %d\n", |
93d5cb51 PA |
614 | __func__, rc); |
615 | } | |
616 | rc = dfs_cache_update_vol(cifs_sb->origin_fullpath, server); | |
617 | if (rc) { | |
afe6f653 | 618 | cifs_server_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n", |
93d5cb51 PA |
619 | __func__, rc); |
620 | } | |
23324407 | 621 | dfs_cache_free_tgts(&tgt_list); |
8354d88e | 622 | |
93d5cb51 | 623 | } |
8354d88e | 624 | |
bacd704a | 625 | cifs_put_tcp_super(sb); |
93d5cb51 | 626 | #endif |
b8c60012 SP |
627 | if (server->tcpStatus == CifsNeedNegotiate) |
628 | mod_delayed_work(cifsiod_wq, &server->echo, 0); | |
629 | ||
e2e87519 | 630 | wake_up(&server->response_q); |
1da177e4 LT |
631 | return rc; |
632 | } | |
633 | ||
c74093b6 JL |
634 | static void |
635 | cifs_echo_request(struct work_struct *work) | |
636 | { | |
637 | int rc; | |
638 | struct TCP_Server_Info *server = container_of(work, | |
639 | struct TCP_Server_Info, echo.work); | |
b8c60012 SP |
640 | unsigned long echo_interval; |
641 | ||
642 | /* | |
643 | * If we need to renegotiate, set echo interval to zero to | |
644 | * immediately call echo service where we can renegotiate. | |
645 | */ | |
646 | if (server->tcpStatus == CifsNeedNegotiate) | |
647 | echo_interval = 0; | |
648 | else | |
649 | echo_interval = server->echo_interval; | |
c74093b6 | 650 | |
247ec9b4 | 651 | /* |
b8c60012 SP |
652 | * We cannot send an echo if it is disabled. |
653 | * Also, no need to ping if we got a response recently. | |
247ec9b4 | 654 | */ |
4fcd1813 SF |
655 | |
656 | if (server->tcpStatus == CifsNeedReconnect || | |
b8c60012 SP |
657 | server->tcpStatus == CifsExiting || |
658 | server->tcpStatus == CifsNew || | |
f6d76178 | 659 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 660 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
661 | goto requeue_echo; |
662 | ||
f6d76178 | 663 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 664 | if (rc) |
f96637be JP |
665 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
666 | server->hostname); | |
c74093b6 JL |
667 | |
668 | requeue_echo: | |
b8c60012 | 669 | queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval); |
c74093b6 JL |
670 | } |
671 | ||
3d9c2472 | 672 | static bool |
2a37ef94 | 673 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 674 | { |
2a37ef94 JL |
675 | if (!server->bigbuf) { |
676 | server->bigbuf = (char *)cifs_buf_get(); | |
677 | if (!server->bigbuf) { | |
afe6f653 | 678 | cifs_server_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
679 | msleep(3000); |
680 | /* retry will check if exiting */ | |
681 | return false; | |
682 | } | |
2a37ef94 | 683 | } else if (server->large_buf) { |
3d9c2472 | 684 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 685 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
686 | } |
687 | ||
2a37ef94 JL |
688 | if (!server->smallbuf) { |
689 | server->smallbuf = (char *)cifs_small_buf_get(); | |
690 | if (!server->smallbuf) { | |
afe6f653 | 691 | cifs_server_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
692 | msleep(1000); |
693 | /* retry will check if exiting */ | |
694 | return false; | |
695 | } | |
696 | /* beginning of smb buffer is cleared in our buf_get */ | |
697 | } else { | |
698 | /* if existing small buf clear beginning */ | |
1887f601 | 699 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
700 | } |
701 | ||
3d9c2472 PS |
702 | return true; |
703 | } | |
704 | ||
ba749e6d JL |
705 | static bool |
706 | server_unresponsive(struct TCP_Server_Info *server) | |
707 | { | |
6dae51a5 | 708 | /* |
f2caf901 | 709 | * We need to wait 3 echo intervals to make sure we handle such |
6dae51a5 PS |
710 | * situations right: |
711 | * 1s client sends a normal SMB request | |
becc2ba2 | 712 | * 2s client gets a response |
6dae51a5 PS |
713 | * 30s echo workqueue job pops, and decides we got a response recently |
714 | * and don't need to send another | |
715 | * ... | |
716 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
717 | * a response in >60s. | |
718 | */ | |
76e75270 SC |
719 | if ((server->tcpStatus == CifsGood || |
720 | server->tcpStatus == CifsNeedNegotiate) && | |
f2caf901 | 721 | time_after(jiffies, server->lstrp + 3 * server->echo_interval)) { |
afe6f653 RS |
722 | cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n", |
723 | (3 * server->echo_interval) / HZ); | |
ba749e6d | 724 | cifs_reconnect(server); |
ba749e6d JL |
725 | return true; |
726 | } | |
727 | ||
728 | return false; | |
729 | } | |
730 | ||
ef68e831 PS |
731 | static inline bool |
732 | zero_credits(struct TCP_Server_Info *server) | |
733 | { | |
734 | int val; | |
735 | ||
736 | spin_lock(&server->req_lock); | |
737 | val = server->credits + server->echo_credits + server->oplock_credits; | |
738 | if (server->in_flight == 0 && val == 0) { | |
739 | spin_unlock(&server->req_lock); | |
740 | return true; | |
741 | } | |
742 | spin_unlock(&server->req_lock); | |
743 | return false; | |
744 | } | |
745 | ||
71335664 AV |
746 | static int |
747 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) | |
e7015fb1 | 748 | { |
a52c1eb7 JL |
749 | int length = 0; |
750 | int total_read; | |
e7015fb1 | 751 | |
71335664 AV |
752 | smb_msg->msg_control = NULL; |
753 | smb_msg->msg_controllen = 0; | |
e831e6cf | 754 | |
71335664 | 755 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
95edcff4 JL |
756 | try_to_freeze(); |
757 | ||
ef68e831 PS |
758 | /* reconnect if no credits and no requests in flight */ |
759 | if (zero_credits(server)) { | |
760 | cifs_reconnect(server); | |
761 | return -ECONNABORTED; | |
762 | } | |
763 | ||
71335664 AV |
764 | if (server_unresponsive(server)) |
765 | return -ECONNABORTED; | |
2fef137a LL |
766 | if (cifs_rdma_enabled(server) && server->smbd_conn) |
767 | length = smbd_recv(server->smbd_conn, smb_msg); | |
768 | else | |
769 | length = sock_recvmsg(server->ssocket, smb_msg, 0); | |
42c4dfc2 | 770 | |
71335664 AV |
771 | if (server->tcpStatus == CifsExiting) |
772 | return -ESHUTDOWN; | |
e7015fb1 | 773 | |
71335664 | 774 | if (server->tcpStatus == CifsNeedReconnect) { |
e7015fb1 | 775 | cifs_reconnect(server); |
71335664 AV |
776 | return -ECONNABORTED; |
777 | } | |
778 | ||
779 | if (length == -ERESTARTSYS || | |
780 | length == -EAGAIN || | |
781 | length == -EINTR) { | |
e7015fb1 PS |
782 | /* |
783 | * Minimum sleep to prevent looping, allowing socket | |
784 | * to clear and app threads to set tcpStatus | |
785 | * CifsNeedReconnect if server hung. | |
786 | */ | |
787 | usleep_range(1000, 2000); | |
788 | length = 0; | |
a52c1eb7 | 789 | continue; |
71335664 AV |
790 | } |
791 | ||
792 | if (length <= 0) { | |
09aab880 | 793 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 794 | cifs_reconnect(server); |
71335664 | 795 | return -ECONNABORTED; |
e7015fb1 PS |
796 | } |
797 | } | |
a52c1eb7 | 798 | return total_read; |
e7015fb1 | 799 | } |
e7015fb1 | 800 | |
e28bc5b1 JL |
801 | int |
802 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
803 | unsigned int to_read) | |
42c4dfc2 | 804 | { |
71335664 AV |
805 | struct msghdr smb_msg; |
806 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; | |
aa563d7b | 807 | iov_iter_kvec(&smb_msg.msg_iter, READ, &iov, 1, to_read); |
42c4dfc2 | 808 | |
71335664 AV |
809 | return cifs_readv_from_socket(server, &smb_msg); |
810 | } | |
42c4dfc2 | 811 | |
71335664 AV |
812 | int |
813 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, | |
1dbe3466 | 814 | unsigned int page_offset, unsigned int to_read) |
71335664 AV |
815 | { |
816 | struct msghdr smb_msg; | |
1dbe3466 LL |
817 | struct bio_vec bv = { |
818 | .bv_page = page, .bv_len = to_read, .bv_offset = page_offset}; | |
aa563d7b | 819 | iov_iter_bvec(&smb_msg.msg_iter, READ, &bv, 1, to_read); |
71335664 | 820 | return cifs_readv_from_socket(server, &smb_msg); |
e7015fb1 PS |
821 | } |
822 | ||
98bac62c | 823 | static bool |
fe11e4cc | 824 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 825 | { |
98bac62c PS |
826 | /* |
827 | * The first byte big endian of the length field, | |
828 | * is actually not part of the length but the type | |
829 | * with the most common, zero, as regular data. | |
830 | */ | |
fe11e4cc JL |
831 | switch (type) { |
832 | case RFC1002_SESSION_MESSAGE: | |
833 | /* Regular SMB response */ | |
834 | return true; | |
835 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 836 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
837 | break; |
838 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 839 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
840 | break; |
841 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
842 | /* |
843 | * We get this from Windows 98 instead of an error on | |
844 | * SMB negprot response. | |
845 | */ | |
f96637be | 846 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
847 | /* give server a second to clean up */ |
848 | msleep(1000); | |
849 | /* | |
850 | * Always try 445 first on reconnect since we get NACK | |
851 | * on some if we ever connected to port 139 (the NACK | |
852 | * is since we do not begin with RFC1001 session | |
853 | * initialize frame). | |
854 | */ | |
fe11e4cc | 855 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c | 856 | cifs_reconnect(server); |
fe11e4cc JL |
857 | break; |
858 | default: | |
afe6f653 | 859 | cifs_server_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 860 | cifs_reconnect(server); |
98bac62c PS |
861 | } |
862 | ||
fe11e4cc | 863 | return false; |
98bac62c PS |
864 | } |
865 | ||
e28bc5b1 JL |
866 | void |
867 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 868 | { |
ad69bae1 | 869 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 870 | mid->when_received = jiffies; |
ad69bae1 | 871 | #endif |
ea1f4502 JL |
872 | spin_lock(&GlobalMid_Lock); |
873 | if (!malformed) | |
7c9421e1 | 874 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 875 | else |
7c9421e1 | 876 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ddf83afb RS |
877 | /* |
878 | * Trying to handle/dequeue a mid after the send_recv() | |
879 | * function has finished processing it is a bug. | |
880 | */ | |
881 | if (mid->mid_flags & MID_DELETED) | |
882 | printk_once(KERN_WARNING | |
883 | "trying to dequeue a deleted mid\n"); | |
abe57073 | 884 | else { |
ddf83afb | 885 | list_del_init(&mid->qhead); |
abe57073 PS |
886 | mid->mid_flags |= MID_DELETED; |
887 | } | |
ad69bae1 | 888 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 889 | } |
ad69bae1 | 890 | |
86a7964b PS |
891 | static unsigned int |
892 | smb2_get_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) | |
893 | { | |
894 | struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; | |
895 | ||
896 | /* | |
897 | * SMB1 does not use credits. | |
898 | */ | |
899 | if (server->vals->header_preamble_size) | |
900 | return 0; | |
901 | ||
902 | return le16_to_cpu(shdr->CreditRequest); | |
903 | } | |
904 | ||
c8054ebd JL |
905 | static void |
906 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 907 | char *buf, int malformed) |
ea1f4502 | 908 | { |
316cf94a PS |
909 | if (server->ops->check_trans2 && |
910 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 911 | return; |
86a7964b | 912 | mid->credits_received = smb2_get_credits_from_hdr(buf, server); |
ea1f4502 | 913 | mid->resp_buf = buf; |
7c9421e1 | 914 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
915 | /* Was previous buf put in mpx struct for multi-rsp? */ |
916 | if (!mid->multiRsp) { | |
917 | /* smb buffer will be freed by user thread */ | |
918 | if (server->large_buf) | |
919 | server->bigbuf = NULL; | |
920 | else | |
921 | server->smallbuf = NULL; | |
922 | } | |
ffc00e27 | 923 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
924 | } |
925 | ||
762dfd10 PS |
926 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
927 | { | |
928 | int length; | |
929 | ||
930 | /* take it off the list, if it's not already */ | |
931 | spin_lock(&cifs_tcp_ses_lock); | |
932 | list_del_init(&server->tcp_ses_list); | |
933 | spin_unlock(&cifs_tcp_ses_lock); | |
934 | ||
935 | spin_lock(&GlobalMid_Lock); | |
936 | server->tcpStatus = CifsExiting; | |
937 | spin_unlock(&GlobalMid_Lock); | |
938 | wake_up_all(&server->response_q); | |
939 | ||
2d86dbc9 | 940 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 941 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
942 | if (server->credits <= 0) |
943 | server->credits = 1; | |
fc40f9cf | 944 | spin_unlock(&server->req_lock); |
762dfd10 PS |
945 | /* |
946 | * Although there should not be any requests blocked on this queue it | |
947 | * can not hurt to be paranoid and try to wake up requests that may | |
948 | * haven been blocked when more than 50 at time were on the wire to the | |
949 | * same server - they now will see the session is in exit state and get | |
950 | * out of SendReceive. | |
951 | */ | |
952 | wake_up_all(&server->request_q); | |
953 | /* give those requests time to exit */ | |
954 | msleep(125); | |
050b8c37 LL |
955 | if (cifs_rdma_enabled(server)) |
956 | smbd_destroy(server); | |
762dfd10 PS |
957 | if (server->ssocket) { |
958 | sock_release(server->ssocket); | |
959 | server->ssocket = NULL; | |
960 | } | |
961 | ||
962 | if (!list_empty(&server->pending_mid_q)) { | |
963 | struct list_head dispose_list; | |
964 | struct mid_q_entry *mid_entry; | |
965 | struct list_head *tmp, *tmp2; | |
966 | ||
967 | INIT_LIST_HEAD(&dispose_list); | |
968 | spin_lock(&GlobalMid_Lock); | |
969 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
970 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 971 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
abe57073 | 972 | kref_get(&mid_entry->refcount); |
7c9421e1 | 973 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 | 974 | list_move(&mid_entry->qhead, &dispose_list); |
abe57073 | 975 | mid_entry->mid_flags |= MID_DELETED; |
762dfd10 PS |
976 | } |
977 | spin_unlock(&GlobalMid_Lock); | |
978 | ||
979 | /* now walk dispose list and issue callbacks */ | |
980 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
981 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 982 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
983 | list_del_init(&mid_entry->qhead); |
984 | mid_entry->callback(mid_entry); | |
abe57073 | 985 | cifs_mid_q_entry_release(mid_entry); |
762dfd10 PS |
986 | } |
987 | /* 1/8th of sec is more than enough time for them to exit */ | |
988 | msleep(125); | |
989 | } | |
990 | ||
991 | if (!list_empty(&server->pending_mid_q)) { | |
992 | /* | |
993 | * mpx threads have not exited yet give them at least the smb | |
994 | * send timeout time for long ops. | |
995 | * | |
996 | * Due to delays on oplock break requests, we need to wait at | |
997 | * least 45 seconds before giving up on a request getting a | |
998 | * response and going ahead and killing cifsd. | |
999 | */ | |
f96637be | 1000 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
1001 | msleep(46000); |
1002 | /* | |
1003 | * If threads still have not exited they are probably never | |
1004 | * coming home not much else we can do but free the memory. | |
1005 | */ | |
1006 | } | |
1007 | ||
1008 | kfree(server->hostname); | |
1009 | kfree(server); | |
1010 | ||
1011 | length = atomic_dec_return(&tcpSesAllocCount); | |
1012 | if (length > 0) | |
11d83360 | 1013 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
1014 | } |
1015 | ||
e9097ab4 JL |
1016 | static int |
1017 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
1018 | { | |
1019 | int length; | |
1020 | char *buf = server->smallbuf; | |
2e96467d | 1021 | unsigned int pdu_length = server->pdu_size; |
e9097ab4 JL |
1022 | |
1023 | /* make sure this will fit in a large buffer */ | |
93012bf9 RS |
1024 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - |
1025 | server->vals->header_preamble_size) { | |
afe6f653 | 1026 | cifs_server_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 | 1027 | cifs_reconnect(server); |
3fabaa27 | 1028 | return -ECONNABORTED; |
e9097ab4 JL |
1029 | } |
1030 | ||
1031 | /* switch to large buffer if too big for a small one */ | |
1032 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
1033 | server->large_buf = true; | |
d4e4854f | 1034 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 1035 | buf = server->bigbuf; |
e9097ab4 JL |
1036 | } |
1037 | ||
1038 | /* now read the rest */ | |
1887f601 | 1039 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
93012bf9 RS |
1040 | pdu_length - HEADER_SIZE(server) + 1 |
1041 | + server->vals->header_preamble_size); | |
1042 | ||
e9097ab4 JL |
1043 | if (length < 0) |
1044 | return length; | |
1045 | server->total_read += length; | |
1046 | ||
d4e4854f | 1047 | dump_smb(buf, server->total_read); |
e9097ab4 | 1048 | |
4326ed2f PS |
1049 | return cifs_handle_standard(server, mid); |
1050 | } | |
1051 | ||
1052 | int | |
1053 | cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
1054 | { | |
1055 | char *buf = server->large_buf ? server->bigbuf : server->smallbuf; | |
1056 | int length; | |
1057 | ||
e9097ab4 JL |
1058 | /* |
1059 | * We know that we received enough to get to the MID as we | |
1060 | * checked the pdu_length earlier. Now check to see | |
1061 | * if the rest of the header is OK. We borrow the length | |
1062 | * var for the rest of the loop to avoid a new stack var. | |
1063 | * | |
1064 | * 48 bytes is enough to display the header and a little bit | |
1065 | * into the payload for debugging purposes. | |
1066 | */ | |
373512ec | 1067 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
1068 | if (length != 0) |
1069 | cifs_dump_mem("Bad SMB: ", buf, | |
1070 | min_t(unsigned int, server->total_read, 48)); | |
1071 | ||
511c54a2 PS |
1072 | if (server->ops->is_session_expired && |
1073 | server->ops->is_session_expired(buf)) { | |
1074 | cifs_reconnect(server); | |
511c54a2 PS |
1075 | return -1; |
1076 | } | |
1077 | ||
2e44b288 | 1078 | if (server->ops->is_status_pending && |
66265f13 | 1079 | server->ops->is_status_pending(buf, server)) |
2e44b288 PS |
1080 | return -1; |
1081 | ||
ff4fa4a2 JL |
1082 | if (!mid) |
1083 | return length; | |
e9097ab4 | 1084 | |
d4e4854f | 1085 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 1086 | return 0; |
e9097ab4 JL |
1087 | } |
1088 | ||
eca00452 RS |
1089 | static void |
1090 | smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) | |
1091 | { | |
1092 | struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; | |
1093 | ||
1094 | /* | |
1095 | * SMB1 does not use credits. | |
1096 | */ | |
1097 | if (server->vals->header_preamble_size) | |
1098 | return; | |
1099 | ||
1100 | if (shdr->CreditRequest) { | |
1101 | spin_lock(&server->req_lock); | |
1102 | server->credits += le16_to_cpu(shdr->CreditRequest); | |
1103 | spin_unlock(&server->req_lock); | |
1104 | wake_up(&server->request_q); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | ||
1da177e4 | 1109 | static int |
7c97c200 | 1110 | cifs_demultiplex_thread(void *p) |
1da177e4 | 1111 | { |
b24df3e3 | 1112 | int i, num_mids, length; |
7c97c200 | 1113 | struct TCP_Server_Info *server = p; |
2a37ef94 | 1114 | unsigned int pdu_length; |
8ce79ec3 | 1115 | unsigned int next_offset; |
2a37ef94 | 1116 | char *buf = NULL; |
a5c3e1c7 | 1117 | struct task_struct *task_to_wake = NULL; |
b24df3e3 RS |
1118 | struct mid_q_entry *mids[MAX_COMPOUND]; |
1119 | char *bufs[MAX_COMPOUND]; | |
dc920277 | 1120 | unsigned int noreclaim_flag; |
1da177e4 | 1121 | |
dc920277 | 1122 | noreclaim_flag = memalloc_noreclaim_save(); |
f96637be | 1123 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
1124 | |
1125 | length = atomic_inc_return(&tcpSesAllocCount); | |
1126 | if (length > 1) | |
11d83360 | 1127 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 1128 | |
83144186 | 1129 | set_freezable(); |
33da8e7c | 1130 | allow_kernel_signal(SIGKILL); |
469ee614 | 1131 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
1132 | if (try_to_freeze()) |
1133 | continue; | |
b8643e1b | 1134 | |
2a37ef94 | 1135 | if (!allocate_buffers(server)) |
3d9c2472 | 1136 | continue; |
b8643e1b | 1137 | |
2a37ef94 | 1138 | server->large_buf = false; |
2a37ef94 | 1139 | buf = server->smallbuf; |
f01d5e14 | 1140 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 1141 | |
e28bc5b1 | 1142 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 1143 | if (length < 0) |
1da177e4 | 1144 | continue; |
977b6170 RS |
1145 | |
1146 | if (server->vals->header_preamble_size == 0) | |
1147 | server->total_read = 0; | |
1148 | else | |
1149 | server->total_read = length; | |
1da177e4 | 1150 | |
98bac62c PS |
1151 | /* |
1152 | * The right amount was read from socket - 4 bytes, | |
1153 | * so we can now interpret the length field. | |
1154 | */ | |
d4e4854f | 1155 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 1156 | |
f96637be | 1157 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 1158 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 1159 | continue; |
8ce79ec3 RS |
1160 | next_pdu: |
1161 | server->pdu_size = pdu_length; | |
e4eb295d | 1162 | |
89482a56 | 1163 | /* make sure we have enough to get to the MID */ |
8ce79ec3 | 1164 | if (server->pdu_size < HEADER_SIZE(server) - 1 - |
93012bf9 | 1165 | server->vals->header_preamble_size) { |
afe6f653 | 1166 | cifs_server_dbg(VFS, "SMB response too short (%u bytes)\n", |
8ce79ec3 | 1167 | server->pdu_size); |
89482a56 | 1168 | cifs_reconnect(server); |
89482a56 | 1169 | continue; |
e4eb295d | 1170 | } |
e7015fb1 | 1171 | |
89482a56 | 1172 | /* read down to the MID */ |
93012bf9 RS |
1173 | length = cifs_read_from_socket(server, |
1174 | buf + server->vals->header_preamble_size, | |
1175 | HEADER_SIZE(server) - 1 | |
1176 | - server->vals->header_preamble_size); | |
89482a56 | 1177 | if (length < 0) |
e4eb295d | 1178 | continue; |
2a37ef94 | 1179 | server->total_read += length; |
1da177e4 | 1180 | |
8ce79ec3 RS |
1181 | if (server->ops->next_header) { |
1182 | next_offset = server->ops->next_header(buf); | |
1183 | if (next_offset) | |
1184 | server->pdu_size = next_offset; | |
1185 | } | |
1186 | ||
b24df3e3 RS |
1187 | memset(mids, 0, sizeof(mids)); |
1188 | memset(bufs, 0, sizeof(bufs)); | |
1189 | num_mids = 0; | |
1190 | ||
9bb17e09 PS |
1191 | if (server->ops->is_transform_hdr && |
1192 | server->ops->receive_transform && | |
1193 | server->ops->is_transform_hdr(buf)) { | |
1194 | length = server->ops->receive_transform(server, | |
b24df3e3 RS |
1195 | mids, |
1196 | bufs, | |
1197 | &num_mids); | |
9bb17e09 | 1198 | } else { |
b24df3e3 RS |
1199 | mids[0] = server->ops->find_mid(server, buf); |
1200 | bufs[0] = buf; | |
7af929d6 | 1201 | num_mids = 1; |
50c2f753 | 1202 | |
b24df3e3 RS |
1203 | if (!mids[0] || !mids[0]->receive) |
1204 | length = standard_receive3(server, mids[0]); | |
9bb17e09 | 1205 | else |
b24df3e3 | 1206 | length = mids[0]->receive(server, mids[0]); |
9bb17e09 | 1207 | } |
71823baf | 1208 | |
696e420b | 1209 | if (length < 0) { |
b24df3e3 RS |
1210 | for (i = 0; i < num_mids; i++) |
1211 | if (mids[i]) | |
1212 | cifs_mid_q_entry_release(mids[i]); | |
fe11e4cc | 1213 | continue; |
696e420b | 1214 | } |
1da177e4 | 1215 | |
fda35943 | 1216 | server->lstrp = jiffies; |
38bd4906 | 1217 | |
b24df3e3 RS |
1218 | for (i = 0; i < num_mids; i++) { |
1219 | if (mids[i] != NULL) { | |
1220 | mids[i]->resp_buf_size = server->pdu_size; | |
696e420b | 1221 | |
b24df3e3 RS |
1222 | if (!mids[i]->multiRsp || mids[i]->multiEnd) |
1223 | mids[i]->callback(mids[i]); | |
1224 | ||
1225 | cifs_mid_q_entry_release(mids[i]); | |
1226 | } else if (server->ops->is_oplock_break && | |
1227 | server->ops->is_oplock_break(bufs[i], | |
1228 | server)) { | |
eca00452 | 1229 | smb2_add_credits_from_hdr(bufs[i], server); |
b24df3e3 RS |
1230 | cifs_dbg(FYI, "Received oplock break\n"); |
1231 | } else { | |
afe6f653 | 1232 | cifs_server_dbg(VFS, "No task to wake, unknown frame " |
b24df3e3 RS |
1233 | "received! NumMids %d\n", |
1234 | atomic_read(&midCount)); | |
1235 | cifs_dump_mem("Received Data is: ", bufs[i], | |
1236 | HEADER_SIZE(server)); | |
3e272579 | 1237 | smb2_add_credits_from_hdr(bufs[i], server); |
3979877e | 1238 | #ifdef CONFIG_CIFS_DEBUG2 |
b24df3e3 RS |
1239 | if (server->ops->dump_detail) |
1240 | server->ops->dump_detail(bufs[i], | |
1241 | server); | |
1242 | cifs_dump_mids(server); | |
3979877e | 1243 | #endif /* CIFS_DEBUG2 */ |
b24df3e3 | 1244 | } |
8ce79ec3 | 1245 | } |
b24df3e3 | 1246 | |
8ce79ec3 RS |
1247 | if (pdu_length > server->pdu_size) { |
1248 | if (!allocate_buffers(server)) | |
1249 | continue; | |
1250 | pdu_length -= server->pdu_size; | |
1251 | server->total_read = 0; | |
1252 | server->large_buf = false; | |
1253 | buf = server->smallbuf; | |
1254 | goto next_pdu; | |
e4eb295d SF |
1255 | } |
1256 | } /* end while !EXITING */ | |
1257 | ||
fd62cb7e | 1258 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
1259 | cifs_buf_release(server->bigbuf); |
1260 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
1261 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 1262 | |
a5c3e1c7 | 1263 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 1264 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
1265 | |
1266 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
1267 | if (!task_to_wake) { | |
1268 | set_current_state(TASK_INTERRUPTIBLE); | |
1269 | while (!signal_pending(current)) { | |
1270 | schedule(); | |
1271 | set_current_state(TASK_INTERRUPTIBLE); | |
1272 | } | |
1273 | set_current_state(TASK_RUNNING); | |
1274 | } | |
1275 | ||
dc920277 | 1276 | memalloc_noreclaim_restore(noreclaim_flag); |
0468a2cf | 1277 | module_put_and_exit(0); |
1da177e4 LT |
1278 | } |
1279 | ||
c359cf3c JL |
1280 | /* extract the host portion of the UNC string */ |
1281 | static char * | |
1282 | extract_hostname(const char *unc) | |
1283 | { | |
1284 | const char *src; | |
1285 | char *dst, *delim; | |
1286 | unsigned int len; | |
1287 | ||
1288 | /* skip double chars at beginning of string */ | |
1289 | /* BB: check validity of these bytes? */ | |
c34fea5a PA |
1290 | if (strlen(unc) < 3) |
1291 | return ERR_PTR(-EINVAL); | |
1292 | for (src = unc; *src && *src == '\\'; src++) | |
1293 | ; | |
1294 | if (!*src) | |
1295 | return ERR_PTR(-EINVAL); | |
c359cf3c JL |
1296 | |
1297 | /* delimiter between hostname and sharename is always '\\' now */ | |
1298 | delim = strchr(src, '\\'); | |
1299 | if (!delim) | |
1300 | return ERR_PTR(-EINVAL); | |
1301 | ||
1302 | len = delim - src; | |
1303 | dst = kmalloc((len + 1), GFP_KERNEL); | |
1304 | if (dst == NULL) | |
1305 | return ERR_PTR(-ENOMEM); | |
1306 | ||
1307 | memcpy(dst, src, len); | |
1308 | dst[len] = '\0'; | |
1309 | ||
1310 | return dst; | |
1311 | } | |
1312 | ||
8830d7e0 SP |
1313 | static int get_option_ul(substring_t args[], unsigned long *option) |
1314 | { | |
1315 | int rc; | |
1316 | char *string; | |
1317 | ||
1318 | string = match_strdup(args); | |
1319 | if (string == NULL) | |
1320 | return -ENOMEM; | |
bfa890a3 | 1321 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
1322 | kfree(string); |
1323 | ||
1324 | return rc; | |
1325 | } | |
1326 | ||
3da46565 EB |
1327 | static int get_option_uid(substring_t args[], kuid_t *result) |
1328 | { | |
1329 | unsigned long value; | |
1330 | kuid_t uid; | |
1331 | int rc; | |
1332 | ||
1333 | rc = get_option_ul(args, &value); | |
1334 | if (rc) | |
1335 | return rc; | |
1336 | ||
1337 | uid = make_kuid(current_user_ns(), value); | |
1338 | if (!uid_valid(uid)) | |
1339 | return -EINVAL; | |
1340 | ||
1341 | *result = uid; | |
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1346 | { | |
1347 | unsigned long value; | |
1348 | kgid_t gid; | |
1349 | int rc; | |
1350 | ||
1351 | rc = get_option_ul(args, &value); | |
1352 | if (rc) | |
1353 | return rc; | |
1354 | ||
1355 | gid = make_kgid(current_user_ns(), value); | |
1356 | if (!gid_valid(gid)) | |
1357 | return -EINVAL; | |
1358 | ||
1359 | *result = gid; | |
1360 | return 0; | |
1361 | } | |
8830d7e0 SP |
1362 | |
1363 | static int cifs_parse_security_flavors(char *value, | |
1364 | struct smb_vol *vol) | |
1365 | { | |
1366 | ||
1367 | substring_t args[MAX_OPT_ARGS]; | |
1368 | ||
1e3cc57e JL |
1369 | /* |
1370 | * With mount options, the last one should win. Reset any existing | |
1371 | * settings back to default. | |
1372 | */ | |
1373 | vol->sectype = Unspecified; | |
1374 | vol->sign = false; | |
1375 | ||
8830d7e0 | 1376 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1377 | case Opt_sec_krb5p: |
1378 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1379 | return 1; | |
1380 | case Opt_sec_krb5i: | |
1381 | vol->sign = true; | |
1382 | /* Fallthrough */ | |
8830d7e0 | 1383 | case Opt_sec_krb5: |
1e3cc57e | 1384 | vol->sectype = Kerberos; |
8830d7e0 | 1385 | break; |
3f618223 | 1386 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1387 | vol->sign = true; |
3f618223 | 1388 | /* Fallthrough */ |
8830d7e0 | 1389 | case Opt_sec_ntlmssp: |
1e3cc57e | 1390 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1391 | break; |
3f618223 | 1392 | case Opt_sec_ntlmi: |
1e3cc57e | 1393 | vol->sign = true; |
3f618223 | 1394 | /* Fallthrough */ |
8830d7e0 | 1395 | case Opt_ntlm: |
1e3cc57e | 1396 | vol->sectype = NTLM; |
8830d7e0 | 1397 | break; |
3f618223 | 1398 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1399 | vol->sign = true; |
3f618223 | 1400 | /* Fallthrough */ |
7659624f | 1401 | case Opt_sec_ntlmv2: |
1e3cc57e | 1402 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1403 | break; |
1404 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1405 | case Opt_sec_lanman: | |
1e3cc57e | 1406 | vol->sectype = LANMAN; |
8830d7e0 SP |
1407 | break; |
1408 | #endif | |
1409 | case Opt_sec_none: | |
1410 | vol->nullauth = 1; | |
1411 | break; | |
1412 | default: | |
f96637be | 1413 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1414 | return 1; |
1415 | } | |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
15b6a473 JL |
1420 | static int |
1421 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1422 | { | |
1423 | substring_t args[MAX_OPT_ARGS]; | |
1424 | ||
1425 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1426 | case Opt_cache_loose: | |
1427 | vol->direct_io = false; | |
1428 | vol->strict_io = false; | |
83bbfa70 | 1429 | vol->cache_ro = false; |
41e033fe | 1430 | vol->cache_rw = false; |
15b6a473 JL |
1431 | break; |
1432 | case Opt_cache_strict: | |
1433 | vol->direct_io = false; | |
1434 | vol->strict_io = true; | |
83bbfa70 | 1435 | vol->cache_ro = false; |
41e033fe | 1436 | vol->cache_rw = false; |
15b6a473 JL |
1437 | break; |
1438 | case Opt_cache_none: | |
1439 | vol->direct_io = true; | |
1440 | vol->strict_io = false; | |
83bbfa70 | 1441 | vol->cache_ro = false; |
41e033fe | 1442 | vol->cache_rw = false; |
83bbfa70 SF |
1443 | break; |
1444 | case Opt_cache_ro: | |
1445 | vol->direct_io = false; | |
1446 | vol->strict_io = false; | |
1447 | vol->cache_ro = true; | |
41e033fe SF |
1448 | vol->cache_rw = false; |
1449 | break; | |
1450 | case Opt_cache_rw: | |
1451 | vol->direct_io = false; | |
1452 | vol->strict_io = false; | |
1453 | vol->cache_ro = false; | |
1454 | vol->cache_rw = true; | |
15b6a473 JL |
1455 | break; |
1456 | default: | |
f96637be | 1457 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1458 | return 1; |
1459 | } | |
1460 | return 0; | |
1461 | } | |
1462 | ||
23db65f5 | 1463 | static int |
c7c137b9 | 1464 | cifs_parse_smb_version(char *value, struct smb_vol *vol, bool is_smb3) |
23db65f5 JL |
1465 | { |
1466 | substring_t args[MAX_OPT_ARGS]; | |
1467 | ||
1468 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
7420451f | 1469 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
23db65f5 | 1470 | case Smb_1: |
f92a720e SF |
1471 | if (disable_legacy_dialects) { |
1472 | cifs_dbg(VFS, "mount with legacy dialect disabled\n"); | |
1473 | return 1; | |
1474 | } | |
c7c137b9 SF |
1475 | if (is_smb3) { |
1476 | cifs_dbg(VFS, "vers=1.0 (cifs) not permitted when mounting with smb3\n"); | |
1477 | return 1; | |
1478 | } | |
8fe0c2c2 SF |
1479 | cifs_dbg(VFS, "Use of the less secure dialect vers=1.0 " |
1480 | "is not recommended unless required for " | |
1481 | "access to very old servers\n"); | |
23db65f5 JL |
1482 | vol->ops = &smb1_operations; |
1483 | vol->vals = &smb1_values; | |
1484 | break; | |
dd446b16 | 1485 | case Smb_20: |
f92a720e SF |
1486 | if (disable_legacy_dialects) { |
1487 | cifs_dbg(VFS, "mount with legacy dialect disabled\n"); | |
1488 | return 1; | |
1489 | } | |
c7c137b9 SF |
1490 | if (is_smb3) { |
1491 | cifs_dbg(VFS, "vers=2.0 not permitted when mounting with smb3\n"); | |
1492 | return 1; | |
1493 | } | |
53ef1016 | 1494 | vol->ops = &smb20_operations; |
dd446b16 SF |
1495 | vol->vals = &smb20_values; |
1496 | break; | |
7420451f SF |
1497 | #else |
1498 | case Smb_1: | |
1499 | cifs_dbg(VFS, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n"); | |
1500 | return 1; | |
1501 | case Smb_20: | |
1502 | cifs_dbg(VFS, "vers=2.0 mount not permitted when legacy dialects disabled\n"); | |
1503 | return 1; | |
1504 | #endif /* CIFS_ALLOW_INSECURE_LEGACY */ | |
1080ef75 SF |
1505 | case Smb_21: |
1506 | vol->ops = &smb21_operations; | |
1507 | vol->vals = &smb21_values; | |
1508 | break; | |
e4aa25e7 | 1509 | case Smb_30: |
38107d45 | 1510 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1511 | vol->vals = &smb30_values; |
1512 | break; | |
20b6d8b4 SF |
1513 | case Smb_302: |
1514 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1515 | vol->vals = &smb302_values; | |
1516 | break; | |
5f7fbf73 | 1517 | case Smb_311: |
aab1893d | 1518 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1519 | vol->vals = &smb311_values; |
1520 | break; | |
9764c02f SF |
1521 | case Smb_3any: |
1522 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1523 | vol->vals = &smb3any_values; | |
1524 | break; | |
1525 | case Smb_default: | |
1526 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1527 | vol->vals = &smbdefault_values; | |
1528 | break; | |
23db65f5 | 1529 | default: |
f96637be | 1530 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1531 | return 1; |
1532 | } | |
1533 | return 0; | |
1534 | } | |
1535 | ||
d387a5c5 JL |
1536 | /* |
1537 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1538 | * fields with the result. Returns 0 on success and an error otherwise. | |
1539 | */ | |
1540 | static int | |
1541 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1542 | { | |
1543 | char *pos; | |
1544 | const char *delims = "/\\"; | |
1545 | size_t len; | |
1546 | ||
68e2672f YL |
1547 | if (unlikely(!devname || !*devname)) { |
1548 | cifs_dbg(VFS, "Device name not specified.\n"); | |
1549 | return -EINVAL; | |
1550 | } | |
1551 | ||
d387a5c5 JL |
1552 | /* make sure we have a valid UNC double delimiter prefix */ |
1553 | len = strspn(devname, delims); | |
1554 | if (len != 2) | |
1555 | return -EINVAL; | |
1556 | ||
1557 | /* find delimiter between host and sharename */ | |
1558 | pos = strpbrk(devname + 2, delims); | |
1559 | if (!pos) | |
1560 | return -EINVAL; | |
1561 | ||
1562 | /* skip past delimiter */ | |
1563 | ++pos; | |
1564 | ||
1565 | /* now go until next delimiter or end of string */ | |
1566 | len = strcspn(pos, delims); | |
1567 | ||
1568 | /* move "pos" up to delimiter or NULL */ | |
1569 | pos += len; | |
1570 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1571 | if (!vol->UNC) | |
1572 | return -ENOMEM; | |
1573 | ||
1574 | convert_delimiter(vol->UNC, '\\'); | |
1575 | ||
11e31647 SP |
1576 | /* skip any delimiter */ |
1577 | if (*pos == '/' || *pos == '\\') | |
1578 | pos++; | |
1579 | ||
1580 | /* If pos is NULL then no prepath */ | |
1581 | if (!*pos) | |
d387a5c5 JL |
1582 | return 0; |
1583 | ||
1584 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1585 | if (!vol->prepath) | |
1586 | return -ENOMEM; | |
1587 | ||
1588 | return 0; | |
1589 | } | |
1590 | ||
1da177e4 | 1591 | static int |
b946845a | 1592 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
c7c137b9 | 1593 | struct smb_vol *vol, bool is_smb3) |
1da177e4 | 1594 | { |
8830d7e0 | 1595 | char *data, *end; |
957df453 | 1596 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1597 | unsigned int temp_len, i, j; |
1598 | char separator[2]; | |
9b9d6b24 JL |
1599 | short int override_uid = -1; |
1600 | short int override_gid = -1; | |
1601 | bool uid_specified = false; | |
1602 | bool gid_specified = false; | |
d8162558 JL |
1603 | bool sloppy = false; |
1604 | char *invalid = NULL; | |
88463999 | 1605 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1606 | char *string = NULL; |
1607 | char *tmp_end, *value; | |
1608 | char delim; | |
b979aaa1 | 1609 | bool got_ip = false; |
7e682f76 | 1610 | bool got_version = false; |
b979aaa1 JL |
1611 | unsigned short port = 0; |
1612 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1613 | |
1614 | separator[0] = ','; | |
50c2f753 | 1615 | separator[1] = 0; |
8830d7e0 | 1616 | delim = separator[0]; |
1da177e4 | 1617 | |
6ee9542a JL |
1618 | /* ensure we always start with zeroed-out smb_vol */ |
1619 | memset(vol, 0, sizeof(*vol)); | |
1620 | ||
88463999 JL |
1621 | /* |
1622 | * does not have to be perfect mapping since field is | |
1623 | * informational, only used for servers that do not support | |
1624 | * port 445 and it can be overridden at mount time | |
1625 | */ | |
1397f2ee JL |
1626 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1627 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1628 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1629 | ||
1397f2ee | 1630 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1631 | /* null target name indicates to use *SMBSERVR default called name |
1632 | if we end up sending RFC1001 session initialize */ | |
1633 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1634 | vol->cred_uid = current_uid(); |
1635 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1636 | vol->linux_gid = current_gid(); |
e8506d25 | 1637 | vol->bsize = 1024 * 1024; /* can improve cp performance significantly */ |
2baa2682 SF |
1638 | /* |
1639 | * default to SFM style remapping of seven reserved characters | |
1640 | * unless user overrides it or we negotiate CIFS POSIX where | |
1641 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1642 | * since then readdir could list files that open could not open | |
1643 | */ | |
1644 | vol->remap = true; | |
1645 | ||
f55ed1a8 JL |
1646 | /* default to only allowing write access to owner of the mount */ |
1647 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1648 | |
1649 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1650 | /* default is always to request posix paths. */ |
1651 | vol->posix_paths = 1; | |
a0c9217f JL |
1652 | /* default to using server inode numbers where available */ |
1653 | vol->server_ino = 1; | |
ac67055e | 1654 | |
1b359204 JL |
1655 | /* default is to use strict cifs caching semantics */ |
1656 | vol->strict_io = true; | |
1657 | ||
6d20e840 SJ |
1658 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1659 | ||
ca567eb2 SF |
1660 | /* Most clients set timeout to 0, allows server to use its default */ |
1661 | vol->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */ | |
1662 | ||
9764c02f SF |
1663 | /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */ |
1664 | vol->ops = &smb30_operations; | |
1665 | vol->vals = &smbdefault_values; | |
23db65f5 | 1666 | |
b782fcc1 RV |
1667 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
1668 | ||
bcc88801 AA |
1669 | /* default to no multichannel (single server connection) */ |
1670 | vol->multichannel = false; | |
1671 | vol->max_channels = 1; | |
1672 | ||
b946845a SF |
1673 | if (!mountdata) |
1674 | goto cifs_parse_mount_err; | |
1675 | ||
1676 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1677 | if (!mountdata_copy) | |
1678 | goto cifs_parse_mount_err; | |
1da177e4 | 1679 | |
b946845a | 1680 | options = mountdata_copy; |
4906e50b | 1681 | end = options + strlen(options); |
8830d7e0 | 1682 | |
50c2f753 | 1683 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1684 | if (options[4] != 0) { |
1da177e4 LT |
1685 | separator[0] = options[4]; |
1686 | options += 5; | |
1687 | } else { | |
f96637be | 1688 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1689 | } |
1690 | } | |
3d3ea8e6 SP |
1691 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1692 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1693 | |
37d4f99b JL |
1694 | switch (cifs_parse_devname(devname, vol)) { |
1695 | case 0: | |
1696 | break; | |
1697 | case -ENOMEM: | |
1698 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1699 | goto cifs_parse_mount_err; | |
1700 | case -EINVAL: | |
1701 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1702 | goto cifs_parse_mount_err; | |
1703 | default: | |
1704 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1705 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1706 | } |
1707 | ||
1da177e4 | 1708 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1709 | substring_t args[MAX_OPT_ARGS]; |
1710 | unsigned long option; | |
1711 | int token; | |
1712 | ||
1da177e4 LT |
1713 | if (!*data) |
1714 | continue; | |
1da177e4 | 1715 | |
8830d7e0 SP |
1716 | token = match_token(data, cifs_mount_option_tokens, args); |
1717 | ||
1718 | switch (token) { | |
1719 | ||
1720 | /* Ingnore the following */ | |
1721 | case Opt_ignore: | |
1722 | break; | |
1723 | ||
1724 | /* Boolean values */ | |
1725 | case Opt_user_xattr: | |
1da177e4 | 1726 | vol->no_xattr = 0; |
8830d7e0 SP |
1727 | break; |
1728 | case Opt_nouser_xattr: | |
1da177e4 | 1729 | vol->no_xattr = 1; |
8830d7e0 SP |
1730 | break; |
1731 | case Opt_forceuid: | |
9b9d6b24 | 1732 | override_uid = 1; |
8830d7e0 SP |
1733 | break; |
1734 | case Opt_noforceuid: | |
9b9d6b24 | 1735 | override_uid = 0; |
8830d7e0 | 1736 | break; |
72bd481f JL |
1737 | case Opt_forcegid: |
1738 | override_gid = 1; | |
1739 | break; | |
1740 | case Opt_noforcegid: | |
1741 | override_gid = 0; | |
1742 | break; | |
8830d7e0 | 1743 | case Opt_noblocksend: |
edf1ae40 | 1744 | vol->noblocksnd = 1; |
8830d7e0 SP |
1745 | break; |
1746 | case Opt_noautotune: | |
edf1ae40 | 1747 | vol->noautotune = 1; |
8830d7e0 | 1748 | break; |
3e7a02d4 SF |
1749 | case Opt_nolease: |
1750 | vol->no_lease = 1; | |
1751 | break; | |
8830d7e0 | 1752 | case Opt_hard: |
1da177e4 | 1753 | vol->retry = 1; |
8830d7e0 SP |
1754 | break; |
1755 | case Opt_soft: | |
1da177e4 | 1756 | vol->retry = 0; |
8830d7e0 SP |
1757 | break; |
1758 | case Opt_perm: | |
1da177e4 | 1759 | vol->noperm = 0; |
8830d7e0 SP |
1760 | break; |
1761 | case Opt_noperm: | |
1da177e4 | 1762 | vol->noperm = 1; |
8830d7e0 SP |
1763 | break; |
1764 | case Opt_mapchars: | |
2baa2682 SF |
1765 | vol->sfu_remap = true; |
1766 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1767 | break; |
1768 | case Opt_nomapchars: | |
2baa2682 SF |
1769 | vol->sfu_remap = false; |
1770 | break; | |
1771 | case Opt_mapposix: | |
1772 | vol->remap = true; | |
1773 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1774 | break; | |
1775 | case Opt_nomapposix: | |
1776 | vol->remap = false; | |
8830d7e0 SP |
1777 | break; |
1778 | case Opt_sfu: | |
50c2f753 | 1779 | vol->sfu_emul = 1; |
8830d7e0 SP |
1780 | break; |
1781 | case Opt_nosfu: | |
50c2f753 | 1782 | vol->sfu_emul = 0; |
8830d7e0 SP |
1783 | break; |
1784 | case Opt_nodfs: | |
2c1b8615 | 1785 | vol->nodfs = 1; |
8830d7e0 | 1786 | break; |
8eecd1c2 PAS |
1787 | case Opt_rootfs: |
1788 | #ifdef CONFIG_CIFS_ROOT | |
1789 | vol->rootfs = true; | |
1790 | #endif | |
1791 | break; | |
8830d7e0 | 1792 | case Opt_posixpaths: |
ac67055e | 1793 | vol->posix_paths = 1; |
8830d7e0 SP |
1794 | break; |
1795 | case Opt_noposixpaths: | |
ac67055e | 1796 | vol->posix_paths = 0; |
8830d7e0 SP |
1797 | break; |
1798 | case Opt_nounix: | |
b326614e SF |
1799 | if (vol->linux_ext) |
1800 | cifs_dbg(VFS, | |
1801 | "conflicting unix mount options\n"); | |
c18c842b | 1802 | vol->no_linux_ext = 1; |
8830d7e0 | 1803 | break; |
b326614e SF |
1804 | case Opt_unix: |
1805 | if (vol->no_linux_ext) | |
1806 | cifs_dbg(VFS, | |
1807 | "conflicting unix mount options\n"); | |
1808 | vol->linux_ext = 1; | |
1809 | break; | |
8830d7e0 | 1810 | case Opt_nocase: |
50c2f753 | 1811 | vol->nocase = 1; |
8830d7e0 SP |
1812 | break; |
1813 | case Opt_brl: | |
c46fa8ac | 1814 | vol->nobrl = 0; |
8830d7e0 SP |
1815 | break; |
1816 | case Opt_nobrl: | |
c46fa8ac | 1817 | vol->nobrl = 1; |
5cfdddcf PS |
1818 | /* |
1819 | * turn off mandatory locking in mode | |
8830d7e0 | 1820 | * if remote locking is turned off since the |
5cfdddcf PS |
1821 | * local vfs will do advisory |
1822 | */ | |
50c2f753 SF |
1823 | if (vol->file_mode == |
1824 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1825 | vol->file_mode = S_IALLUGO; |
8830d7e0 | 1826 | break; |
3d4ef9a1 SF |
1827 | case Opt_nohandlecache: |
1828 | vol->nohandlecache = 1; | |
1829 | break; | |
1830 | case Opt_handlecache: | |
1831 | vol->nohandlecache = 0; | |
1832 | break; | |
8830d7e0 | 1833 | case Opt_forcemandatorylock: |
13a6e42a | 1834 | vol->mand_lock = 1; |
8830d7e0 SP |
1835 | break; |
1836 | case Opt_setuids: | |
1da177e4 | 1837 | vol->setuids = 1; |
8830d7e0 SP |
1838 | break; |
1839 | case Opt_nosetuids: | |
1da177e4 | 1840 | vol->setuids = 0; |
8830d7e0 | 1841 | break; |
95932655 SF |
1842 | case Opt_setuidfromacl: |
1843 | vol->setuidfromacl = 1; | |
1844 | break; | |
8830d7e0 | 1845 | case Opt_dynperm: |
d0a9c078 | 1846 | vol->dynperm = true; |
8830d7e0 SP |
1847 | break; |
1848 | case Opt_nodynperm: | |
d0a9c078 | 1849 | vol->dynperm = false; |
8830d7e0 SP |
1850 | break; |
1851 | case Opt_nohard: | |
1da177e4 | 1852 | vol->retry = 0; |
8830d7e0 SP |
1853 | break; |
1854 | case Opt_nosoft: | |
1da177e4 | 1855 | vol->retry = 1; |
8830d7e0 SP |
1856 | break; |
1857 | case Opt_nointr: | |
1da177e4 | 1858 | vol->intr = 0; |
8830d7e0 SP |
1859 | break; |
1860 | case Opt_intr: | |
1da177e4 | 1861 | vol->intr = 1; |
8830d7e0 SP |
1862 | break; |
1863 | case Opt_nostrictsync: | |
be652445 | 1864 | vol->nostrictsync = 1; |
8830d7e0 SP |
1865 | break; |
1866 | case Opt_strictsync: | |
be652445 | 1867 | vol->nostrictsync = 0; |
8830d7e0 SP |
1868 | break; |
1869 | case Opt_serverino: | |
1da177e4 | 1870 | vol->server_ino = 1; |
8830d7e0 SP |
1871 | break; |
1872 | case Opt_noserverino: | |
1da177e4 | 1873 | vol->server_ino = 0; |
8830d7e0 SP |
1874 | break; |
1875 | case Opt_rwpidforward: | |
d4ffff1f | 1876 | vol->rwpidforward = 1; |
8830d7e0 | 1877 | break; |
412094a8 SF |
1878 | case Opt_modesid: |
1879 | vol->mode_ace = 1; | |
1880 | break; | |
8830d7e0 | 1881 | case Opt_cifsacl: |
0a4b92c0 | 1882 | vol->cifs_acl = 1; |
8830d7e0 SP |
1883 | break; |
1884 | case Opt_nocifsacl: | |
0a4b92c0 | 1885 | vol->cifs_acl = 0; |
8830d7e0 SP |
1886 | break; |
1887 | case Opt_acl: | |
1da177e4 | 1888 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1889 | break; |
1890 | case Opt_noacl: | |
1da177e4 | 1891 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1892 | break; |
1893 | case Opt_locallease: | |
84210e91 | 1894 | vol->local_lease = 1; |
8830d7e0 SP |
1895 | break; |
1896 | case Opt_sign: | |
1e3cc57e | 1897 | vol->sign = true; |
8830d7e0 | 1898 | break; |
4f5c10f1 SF |
1899 | case Opt_ignore_signature: |
1900 | vol->sign = true; | |
1901 | vol->ignore_signature = true; | |
1902 | break; | |
8830d7e0 | 1903 | case Opt_seal: |
95b1cb90 | 1904 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1905 | * is a per tree connection (mount) not a per socket |
1906 | * or per-smb connection option in the protocol | |
1907 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1908 | */ | |
95b1cb90 | 1909 | vol->seal = 1; |
8830d7e0 | 1910 | break; |
8830d7e0 | 1911 | case Opt_noac: |
0b456f04 | 1912 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1913 | break; |
1914 | case Opt_fsc: | |
607a569d | 1915 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1916 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1917 | goto cifs_parse_mount_err; |
607a569d | 1918 | #endif |
fa1df75d | 1919 | vol->fsc = true; |
8830d7e0 SP |
1920 | break; |
1921 | case Opt_mfsymlinks: | |
736a3320 | 1922 | vol->mfsymlinks = true; |
8830d7e0 SP |
1923 | break; |
1924 | case Opt_multiuser: | |
0eb8a132 | 1925 | vol->multiuser = true; |
8830d7e0 | 1926 | break; |
d8162558 JL |
1927 | case Opt_sloppy: |
1928 | sloppy = true; | |
1929 | break; | |
a0b3df5c JL |
1930 | case Opt_nosharesock: |
1931 | vol->nosharesock = true; | |
1932 | break; | |
b2a30774 SF |
1933 | case Opt_nopersistent: |
1934 | vol->nopersistent = true; | |
1935 | if (vol->persistent) { | |
1936 | cifs_dbg(VFS, | |
1937 | "persistenthandles mount options conflict\n"); | |
1938 | goto cifs_parse_mount_err; | |
1939 | } | |
1940 | break; | |
1941 | case Opt_persistent: | |
1942 | vol->persistent = true; | |
592fafe6 | 1943 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1944 | cifs_dbg(VFS, |
1945 | "persistenthandles mount options conflict\n"); | |
1946 | goto cifs_parse_mount_err; | |
1947 | } | |
1948 | break; | |
592fafe6 SF |
1949 | case Opt_resilient: |
1950 | vol->resilient = true; | |
1951 | if (vol->persistent) { | |
1952 | cifs_dbg(VFS, | |
1953 | "persistenthandles mount options conflict\n"); | |
1954 | goto cifs_parse_mount_err; | |
1955 | } | |
1956 | break; | |
1957 | case Opt_noresilient: | |
1958 | vol->resilient = false; /* already the default */ | |
1959 | break; | |
39566443 GP |
1960 | case Opt_domainauto: |
1961 | vol->domainauto = true; | |
1962 | break; | |
8339dd32 LL |
1963 | case Opt_rdma: |
1964 | vol->rdma = true; | |
1965 | break; | |
bcc88801 AA |
1966 | case Opt_multichannel: |
1967 | vol->multichannel = true; | |
1968 | break; | |
1969 | case Opt_nomultichannel: | |
1970 | vol->multichannel = false; | |
1971 | break; | |
9fe5ff1c SF |
1972 | case Opt_compress: |
1973 | vol->compression = UNKNOWN_TYPE; | |
1974 | cifs_dbg(VFS, | |
1975 | "SMB3 compression support is experimental\n"); | |
1976 | break; | |
8830d7e0 SP |
1977 | |
1978 | /* Numeric Values */ | |
1979 | case Opt_backupuid: | |
3da46565 | 1980 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1981 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1982 | __func__); | |
3d3ea8e6 SP |
1983 | goto cifs_parse_mount_err; |
1984 | } | |
1985 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1986 | break; |
1987 | case Opt_backupgid: | |
3da46565 | 1988 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1989 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1990 | __func__); | |
3d3ea8e6 SP |
1991 | goto cifs_parse_mount_err; |
1992 | } | |
1993 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1994 | break; |
1995 | case Opt_uid: | |
3da46565 | 1996 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1997 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1998 | __func__); | |
8830d7e0 SP |
1999 | goto cifs_parse_mount_err; |
2000 | } | |
8830d7e0 SP |
2001 | uid_specified = true; |
2002 | break; | |
2003 | case Opt_cruid: | |
3da46565 | 2004 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
2005 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
2006 | __func__); | |
8830d7e0 SP |
2007 | goto cifs_parse_mount_err; |
2008 | } | |
8830d7e0 SP |
2009 | break; |
2010 | case Opt_gid: | |
3da46565 | 2011 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
2012 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
2013 | __func__); | |
8830d7e0 SP |
2014 | goto cifs_parse_mount_err; |
2015 | } | |
8830d7e0 SP |
2016 | gid_specified = true; |
2017 | break; | |
2018 | case Opt_file_mode: | |
2019 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2020 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
2021 | __func__); | |
8830d7e0 SP |
2022 | goto cifs_parse_mount_err; |
2023 | } | |
2024 | vol->file_mode = option; | |
2025 | break; | |
2026 | case Opt_dirmode: | |
2027 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2028 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
2029 | __func__); | |
8830d7e0 SP |
2030 | goto cifs_parse_mount_err; |
2031 | } | |
2032 | vol->dir_mode = option; | |
2033 | break; | |
2034 | case Opt_port: | |
b979aaa1 JL |
2035 | if (get_option_ul(args, &option) || |
2036 | option > USHRT_MAX) { | |
f96637be JP |
2037 | cifs_dbg(VFS, "%s: Invalid port value\n", |
2038 | __func__); | |
8830d7e0 SP |
2039 | goto cifs_parse_mount_err; |
2040 | } | |
b979aaa1 | 2041 | port = (unsigned short)option; |
8830d7e0 | 2042 | break; |
563317ec SF |
2043 | case Opt_min_enc_offload: |
2044 | if (get_option_ul(args, &option)) { | |
2045 | cifs_dbg(VFS, "Invalid minimum encrypted read offload size (esize)\n"); | |
2046 | goto cifs_parse_mount_err; | |
2047 | } | |
2048 | vol->min_offload = option; | |
2049 | break; | |
e8506d25 SF |
2050 | case Opt_blocksize: |
2051 | if (get_option_ul(args, &option)) { | |
2052 | cifs_dbg(VFS, "%s: Invalid blocksize value\n", | |
2053 | __func__); | |
2054 | goto cifs_parse_mount_err; | |
2055 | } | |
2056 | /* | |
2057 | * inode blocksize realistically should never need to be | |
2058 | * less than 16K or greater than 16M and default is 1MB. | |
2059 | * Note that small inode block sizes (e.g. 64K) can lead | |
2060 | * to very poor performance of common tools like cp and scp | |
2061 | */ | |
2062 | if ((option < CIFS_MAX_MSGSIZE) || | |
2063 | (option > (4 * SMB3_DEFAULT_IOSIZE))) { | |
2064 | cifs_dbg(VFS, "%s: Invalid blocksize\n", | |
2065 | __func__); | |
2066 | goto cifs_parse_mount_err; | |
2067 | } | |
2068 | vol->bsize = option; | |
2069 | break; | |
8830d7e0 SP |
2070 | case Opt_rsize: |
2071 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2072 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
2073 | __func__); | |
b946845a | 2074 | goto cifs_parse_mount_err; |
8830d7e0 SP |
2075 | } |
2076 | vol->rsize = option; | |
2077 | break; | |
2078 | case Opt_wsize: | |
2079 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2080 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
2081 | __func__); | |
8830d7e0 SP |
2082 | goto cifs_parse_mount_err; |
2083 | } | |
2084 | vol->wsize = option; | |
2085 | break; | |
2086 | case Opt_actimeo: | |
2087 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2088 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
2089 | __func__); | |
8830d7e0 SP |
2090 | goto cifs_parse_mount_err; |
2091 | } | |
2092 | vol->actimeo = HZ * option; | |
2093 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 2094 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
2095 | goto cifs_parse_mount_err; |
2096 | } | |
2097 | break; | |
ca567eb2 SF |
2098 | case Opt_handletimeout: |
2099 | if (get_option_ul(args, &option)) { | |
2100 | cifs_dbg(VFS, "%s: Invalid handletimeout value\n", | |
2101 | __func__); | |
2102 | goto cifs_parse_mount_err; | |
2103 | } | |
2104 | vol->handle_timeout = option; | |
2105 | if (vol->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) { | |
2106 | cifs_dbg(VFS, "Invalid handle cache timeout, longer than 16 minutes\n"); | |
2107 | goto cifs_parse_mount_err; | |
2108 | } | |
2109 | break; | |
adfeb3e0 SF |
2110 | case Opt_echo_interval: |
2111 | if (get_option_ul(args, &option)) { | |
2112 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
2113 | __func__); | |
2114 | goto cifs_parse_mount_err; | |
2115 | } | |
2116 | vol->echo_interval = option; | |
2117 | break; | |
8b217fe7 SF |
2118 | case Opt_snapshot: |
2119 | if (get_option_ul(args, &option)) { | |
2120 | cifs_dbg(VFS, "%s: Invalid snapshot time\n", | |
2121 | __func__); | |
2122 | goto cifs_parse_mount_err; | |
2123 | } | |
2124 | vol->snapshot_time = option; | |
2125 | break; | |
141891f4 SF |
2126 | case Opt_max_credits: |
2127 | if (get_option_ul(args, &option) || (option < 20) || | |
2128 | (option > 60000)) { | |
2129 | cifs_dbg(VFS, "%s: Invalid max_credits value\n", | |
2130 | __func__); | |
2131 | goto cifs_parse_mount_err; | |
2132 | } | |
2133 | vol->max_credits = option; | |
2134 | break; | |
bcc88801 AA |
2135 | case Opt_max_channels: |
2136 | if (get_option_ul(args, &option) || option < 1 || | |
2137 | option > CIFS_MAX_CHANNELS) { | |
2138 | cifs_dbg(VFS, "%s: Invalid max_channels value, needs to be 1-%d\n", | |
2139 | __func__, CIFS_MAX_CHANNELS); | |
2140 | goto cifs_parse_mount_err; | |
2141 | } | |
2142 | vol->max_channels = option; | |
2143 | break; | |
8830d7e0 SP |
2144 | |
2145 | /* String Arguments */ | |
2146 | ||
4fe9e963 SP |
2147 | case Opt_blank_user: |
2148 | /* null user, ie. anonymous authentication */ | |
2149 | vol->nullauth = 1; | |
2150 | vol->username = NULL; | |
2151 | break; | |
8830d7e0 SP |
2152 | case Opt_user: |
2153 | string = match_strdup(args); | |
2154 | if (string == NULL) | |
2155 | goto out_nomem; | |
2156 | ||
8c3a2b4c SL |
2157 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
2158 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 2159 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
2160 | goto cifs_parse_mount_err; |
2161 | } | |
2bd50fb3 TK |
2162 | |
2163 | kfree(vol->username); | |
8830d7e0 | 2164 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 2165 | if (!vol->username) |
8830d7e0 | 2166 | goto cifs_parse_mount_err; |
8830d7e0 SP |
2167 | break; |
2168 | case Opt_blank_pass: | |
8830d7e0 SP |
2169 | /* passwords have to be handled differently |
2170 | * to allow the character used for deliminator | |
2171 | * to be passed within them | |
2172 | */ | |
2173 | ||
c369c9a4 SP |
2174 | /* |
2175 | * Check if this is a case where the password | |
2176 | * starts with a delimiter | |
2177 | */ | |
2178 | tmp_end = strchr(data, '='); | |
2179 | tmp_end++; | |
2180 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
2181 | /* No it is not. Set the password to NULL */ | |
97f4b727 | 2182 | kzfree(vol->password); |
c369c9a4 SP |
2183 | vol->password = NULL; |
2184 | break; | |
2185 | } | |
07fa6010 | 2186 | /* Fallthrough - to Opt_pass below.*/ |
c369c9a4 | 2187 | case Opt_pass: |
8830d7e0 SP |
2188 | /* Obtain the value string */ |
2189 | value = strchr(data, '='); | |
10238074 | 2190 | value++; |
8830d7e0 SP |
2191 | |
2192 | /* Set tmp_end to end of the string */ | |
2193 | tmp_end = (char *) value + strlen(value); | |
2194 | ||
2195 | /* Check if following character is the deliminator | |
2196 | * If yes, we have encountered a double deliminator | |
2197 | * reset the NULL character to the deliminator | |
2198 | */ | |
e73f843a | 2199 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
2200 | tmp_end[0] = delim; |
2201 | ||
e73f843a SJ |
2202 | /* Keep iterating until we get to a single |
2203 | * deliminator OR the end | |
2204 | */ | |
2205 | while ((tmp_end = strchr(tmp_end, delim)) | |
2206 | != NULL && (tmp_end[1] == delim)) { | |
2207 | tmp_end = (char *) &tmp_end[2]; | |
2208 | } | |
2209 | ||
2210 | /* Reset var options to point to next element */ | |
2211 | if (tmp_end) { | |
2212 | tmp_end[0] = '\0'; | |
2213 | options = (char *) &tmp_end[1]; | |
2214 | } else | |
2215 | /* Reached the end of the mount option | |
2216 | * string */ | |
2217 | options = end; | |
8830d7e0 SP |
2218 | } |
2219 | ||
97f4b727 | 2220 | kzfree(vol->password); |
8830d7e0 SP |
2221 | /* Now build new password string */ |
2222 | temp_len = strlen(value); | |
2223 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
2224 | if (vol->password == NULL) { | |
0b456f04 | 2225 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
2226 | goto cifs_parse_mount_err; |
2227 | } | |
2228 | ||
2229 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
2230 | vol->password[j] = value[i]; | |
2231 | if ((value[i] == delim) && | |
2232 | value[i+1] == delim) | |
2233 | /* skip the second deliminator */ | |
2234 | i++; | |
2235 | } | |
2236 | vol->password[j] = '\0'; | |
2237 | break; | |
4fe9e963 | 2238 | case Opt_blank_ip: |
b979aaa1 JL |
2239 | /* FIXME: should this be an error instead? */ |
2240 | got_ip = false; | |
4fe9e963 | 2241 | break; |
8830d7e0 SP |
2242 | case Opt_ip: |
2243 | string = match_strdup(args); | |
2244 | if (string == NULL) | |
2245 | goto out_nomem; | |
2246 | ||
b979aaa1 JL |
2247 | if (!cifs_convert_address(dstaddr, string, |
2248 | strlen(string))) { | |
0b456f04 | 2249 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
2250 | goto cifs_parse_mount_err; |
2251 | } | |
b979aaa1 | 2252 | got_ip = true; |
8830d7e0 | 2253 | break; |
8830d7e0 SP |
2254 | case Opt_domain: |
2255 | string = match_strdup(args); | |
2256 | if (string == NULL) | |
2257 | goto out_nomem; | |
2258 | ||
057d6332 CG |
2259 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
2260 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 2261 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
2262 | goto cifs_parse_mount_err; |
2263 | } | |
2264 | ||
2bd50fb3 | 2265 | kfree(vol->domainname); |
8830d7e0 SP |
2266 | vol->domainname = kstrdup(string, GFP_KERNEL); |
2267 | if (!vol->domainname) { | |
0b456f04 | 2268 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
2269 | goto cifs_parse_mount_err; |
2270 | } | |
f96637be | 2271 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
2272 | break; |
2273 | case Opt_srcaddr: | |
2274 | string = match_strdup(args); | |
2275 | if (string == NULL) | |
2276 | goto out_nomem; | |
2277 | ||
4fe9e963 | 2278 | if (!cifs_convert_address( |
8830d7e0 SP |
2279 | (struct sockaddr *)&vol->srcaddr, |
2280 | string, strlen(string))) { | |
0b456f04 AS |
2281 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
2282 | string); | |
8830d7e0 SP |
2283 | goto cifs_parse_mount_err; |
2284 | } | |
2285 | break; | |
8830d7e0 SP |
2286 | case Opt_iocharset: |
2287 | string = match_strdup(args); | |
2288 | if (string == NULL) | |
2289 | goto out_nomem; | |
2290 | ||
4fe9e963 | 2291 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 2292 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
2293 | goto cifs_parse_mount_err; |
2294 | } | |
2295 | ||
87e747cd | 2296 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 2297 | kfree(vol->iocharset); |
8830d7e0 SP |
2298 | vol->iocharset = kstrdup(string, |
2299 | GFP_KERNEL); | |
2300 | if (!vol->iocharset) { | |
0b456f04 | 2301 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
2302 | goto cifs_parse_mount_err; |
2303 | } | |
2304 | } | |
2305 | /* if iocharset not set then load_nls_default | |
2306 | * is used by caller | |
2307 | */ | |
f96637be | 2308 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 2309 | break; |
8830d7e0 SP |
2310 | case Opt_netbiosname: |
2311 | string = match_strdup(args); | |
2312 | if (string == NULL) | |
2313 | goto out_nomem; | |
2314 | ||
8830d7e0 SP |
2315 | memset(vol->source_rfc1001_name, 0x20, |
2316 | RFC1001_NAME_LEN); | |
2317 | /* | |
2318 | * FIXME: are there cases in which a comma can | |
2319 | * be valid in workstation netbios name (and | |
2320 | * need special handling)? | |
2321 | */ | |
2322 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
2323 | /* don't ucase netbiosname for user */ | |
2324 | if (string[i] == 0) | |
2325 | break; | |
2326 | vol->source_rfc1001_name[i] = string[i]; | |
2327 | } | |
2328 | /* The string has 16th byte zero still from | |
2329 | * set at top of the function | |
2330 | */ | |
2331 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 2332 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
2333 | break; |
2334 | case Opt_servern: | |
2335 | /* servernetbiosname specified override *SMBSERVER */ | |
2336 | string = match_strdup(args); | |
2337 | if (string == NULL) | |
2338 | goto out_nomem; | |
2339 | ||
8830d7e0 SP |
2340 | /* last byte, type, is 0x20 for servr type */ |
2341 | memset(vol->target_rfc1001_name, 0x20, | |
2342 | RFC1001_NAME_LEN_WITH_NULL); | |
2343 | ||
2344 | /* BB are there cases in which a comma can be | |
2345 | valid in this workstation netbios name | |
2346 | (and need special handling)? */ | |
2347 | ||
2348 | /* user or mount helper must uppercase the | |
2349 | netbios name */ | |
2350 | for (i = 0; i < 15; i++) { | |
2351 | if (string[i] == 0) | |
2352 | break; | |
2353 | vol->target_rfc1001_name[i] = string[i]; | |
2354 | } | |
2355 | /* The string has 16th byte zero still from | |
2356 | set at top of the function */ | |
2357 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 2358 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
2359 | break; |
2360 | case Opt_ver: | |
7e682f76 | 2361 | /* version of mount userspace tools, not dialect */ |
8830d7e0 SP |
2362 | string = match_strdup(args); |
2363 | if (string == NULL) | |
2364 | goto out_nomem; | |
2365 | ||
7e682f76 | 2366 | /* If interface changes in mount.cifs bump to new ver */ |
87e747cd | 2367 | if (strncasecmp(string, "1", 1) == 0) { |
7e682f76 SF |
2368 | if (strlen(string) > 1) { |
2369 | pr_warn("Bad mount helper ver=%s. Did " | |
2370 | "you want SMB1 (CIFS) dialect " | |
2371 | "and mean to type vers=1.0 " | |
2372 | "instead?\n", string); | |
2373 | goto cifs_parse_mount_err; | |
2374 | } | |
8830d7e0 SP |
2375 | /* This is the default */ |
2376 | break; | |
2377 | } | |
2378 | /* For all other value, error */ | |
7e682f76 | 2379 | pr_warn("CIFS: Invalid mount helper version specified\n"); |
b946845a | 2380 | goto cifs_parse_mount_err; |
23db65f5 | 2381 | case Opt_vers: |
7e682f76 | 2382 | /* protocol version (dialect) */ |
23db65f5 JL |
2383 | string = match_strdup(args); |
2384 | if (string == NULL) | |
2385 | goto out_nomem; | |
2386 | ||
c7c137b9 | 2387 | if (cifs_parse_smb_version(string, vol, is_smb3) != 0) |
23db65f5 | 2388 | goto cifs_parse_mount_err; |
7e682f76 | 2389 | got_version = true; |
23db65f5 | 2390 | break; |
8830d7e0 SP |
2391 | case Opt_sec: |
2392 | string = match_strdup(args); | |
2393 | if (string == NULL) | |
2394 | goto out_nomem; | |
2395 | ||
8830d7e0 SP |
2396 | if (cifs_parse_security_flavors(string, vol) != 0) |
2397 | goto cifs_parse_mount_err; | |
2398 | break; | |
15b6a473 JL |
2399 | case Opt_cache: |
2400 | string = match_strdup(args); | |
2401 | if (string == NULL) | |
2402 | goto out_nomem; | |
2403 | ||
2404 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
2405 | goto cifs_parse_mount_err; | |
2406 | break; | |
8830d7e0 | 2407 | default: |
d8162558 JL |
2408 | /* |
2409 | * An option we don't recognize. Save it off for later | |
2410 | * if we haven't already found one | |
2411 | */ | |
2412 | if (!invalid) | |
2413 | invalid = data; | |
8830d7e0 | 2414 | break; |
1da177e4 | 2415 | } |
8830d7e0 SP |
2416 | /* Free up any allocated string */ |
2417 | kfree(string); | |
2418 | string = NULL; | |
1da177e4 | 2419 | } |
0eb8a132 | 2420 | |
d8162558 | 2421 | if (!sloppy && invalid) { |
0b456f04 | 2422 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
2423 | goto cifs_parse_mount_err; |
2424 | } | |
2425 | ||
8339dd32 LL |
2426 | if (vol->rdma && vol->vals->protocol_id < SMB30_PROT_ID) { |
2427 | cifs_dbg(VFS, "SMB Direct requires Version >=3.0\n"); | |
2428 | goto cifs_parse_mount_err; | |
2429 | } | |
2430 | ||
8a8798a5 JL |
2431 | #ifndef CONFIG_KEYS |
2432 | /* Muliuser mounts require CONFIG_KEYS support */ | |
2433 | if (vol->multiuser) { | |
f96637be | 2434 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 2435 | goto cifs_parse_mount_err; |
0eb8a132 | 2436 | } |
8a8798a5 | 2437 | #endif |
e5e69abd | 2438 | if (!vol->UNC) { |
37d4f99b | 2439 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
2440 | goto cifs_parse_mount_err; |
2441 | } | |
0eb8a132 | 2442 | |
62a1a439 JL |
2443 | /* make sure UNC has a share name */ |
2444 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 2445 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
2446 | goto cifs_parse_mount_err; |
2447 | } | |
2448 | ||
b979aaa1 | 2449 | if (!got_ip) { |
29bb3158 DP |
2450 | int len; |
2451 | const char *slash; | |
2452 | ||
b979aaa1 | 2453 | /* No ip= option specified? Try to get it from UNC */ |
29bb3158 DP |
2454 | /* Use the address part of the UNC. */ |
2455 | slash = strchr(&vol->UNC[2], '\\'); | |
2456 | len = slash - &vol->UNC[2]; | |
2457 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], len)) { | |
0b456f04 | 2458 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
2459 | goto cifs_parse_mount_err; |
2460 | } | |
2461 | } | |
2462 | ||
2463 | /* set the port that we got earlier */ | |
2464 | cifs_set_port(dstaddr, port); | |
1da177e4 | 2465 | |
9b9d6b24 JL |
2466 | if (uid_specified) |
2467 | vol->override_uid = override_uid; | |
2468 | else if (override_uid == 1) | |
0b456f04 | 2469 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
2470 | |
2471 | if (gid_specified) | |
2472 | vol->override_gid = override_gid; | |
2473 | else if (override_gid == 1) | |
0b456f04 | 2474 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 2475 | |
7e682f76 | 2476 | if (got_version == false) |
ba55344f SF |
2477 | pr_warn_once("No dialect specified on mount. Default has changed" |
2478 | " to a more secure dialect, SMB2.1 or later (e.g. " | |
2479 | "SMB3.1.1), from CIFS (SMB1). To use the less secure " | |
2480 | "SMB1 dialect to access old servers which do not " | |
2481 | "support SMB3.1.1 (or even SMB3 or SMB2.1) specify " | |
2482 | "vers=1.0 on mount.\n"); | |
7e682f76 | 2483 | |
b946845a | 2484 | kfree(mountdata_copy); |
1da177e4 | 2485 | return 0; |
b946845a | 2486 | |
8830d7e0 | 2487 | out_nomem: |
0b456f04 | 2488 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 2489 | cifs_parse_mount_err: |
8830d7e0 | 2490 | kfree(string); |
b946845a SF |
2491 | kfree(mountdata_copy); |
2492 | return 1; | |
1da177e4 LT |
2493 | } |
2494 | ||
3eb9a889 BG |
2495 | /** Returns true if srcaddr isn't specified and rhs isn't |
2496 | * specified, or if srcaddr is specified and | |
2497 | * matches the IP address of the rhs argument. | |
2498 | */ | |
2499 | static bool | |
2500 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
2501 | { | |
2502 | switch (srcaddr->sa_family) { | |
2503 | case AF_UNSPEC: | |
2504 | return (rhs->sa_family == AF_UNSPEC); | |
2505 | case AF_INET: { | |
2506 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
2507 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
2508 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
2509 | } | |
2510 | case AF_INET6: { | |
2511 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 2512 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
2513 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
2514 | } | |
2515 | default: | |
2516 | WARN_ON(1); | |
2517 | return false; /* don't expect to be here */ | |
2518 | } | |
2519 | } | |
2520 | ||
4b886136 PS |
2521 | /* |
2522 | * If no port is specified in addr structure, we try to match with 445 port | |
2523 | * and if it fails - with 139 ports. It should be called only if address | |
2524 | * families of server and addr are equal. | |
2525 | */ | |
2526 | static bool | |
2527 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2528 | { | |
6da97910 | 2529 | __be16 port, *sport; |
4b886136 | 2530 | |
3b249115 LL |
2531 | /* SMBDirect manages its own ports, don't match it here */ |
2532 | if (server->rdma) | |
2533 | return true; | |
2534 | ||
4b886136 PS |
2535 | switch (addr->sa_family) { |
2536 | case AF_INET: | |
2537 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2538 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2539 | break; | |
2540 | case AF_INET6: | |
2541 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2542 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2543 | break; | |
2544 | default: | |
2545 | WARN_ON(1); | |
2546 | return false; | |
2547 | } | |
2548 | ||
2549 | if (!port) { | |
2550 | port = htons(CIFS_PORT); | |
2551 | if (port == *sport) | |
2552 | return true; | |
2553 | ||
2554 | port = htons(RFC1001_PORT); | |
2555 | } | |
2556 | ||
2557 | return port == *sport; | |
2558 | } | |
3eb9a889 | 2559 | |
4515148e | 2560 | static bool |
3eb9a889 BG |
2561 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2562 | struct sockaddr *srcaddr) | |
4515148e | 2563 | { |
4515148e | 2564 | switch (addr->sa_family) { |
a9f1b85e PS |
2565 | case AF_INET: { |
2566 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2567 | struct sockaddr_in *srv_addr4 = | |
2568 | (struct sockaddr_in *)&server->dstaddr; | |
2569 | ||
2570 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2571 | return false; |
4515148e | 2572 | break; |
a9f1b85e PS |
2573 | } |
2574 | case AF_INET6: { | |
2575 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2576 | struct sockaddr_in6 *srv_addr6 = | |
2577 | (struct sockaddr_in6 *)&server->dstaddr; | |
2578 | ||
4515148e | 2579 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2580 | &srv_addr6->sin6_addr)) |
4515148e | 2581 | return false; |
a9f1b85e | 2582 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2583 | return false; |
4515148e JL |
2584 | break; |
2585 | } | |
a9f1b85e PS |
2586 | default: |
2587 | WARN_ON(1); | |
2588 | return false; /* don't expect to be here */ | |
2589 | } | |
4515148e | 2590 | |
3eb9a889 BG |
2591 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2592 | return false; | |
2593 | ||
4515148e JL |
2594 | return true; |
2595 | } | |
2596 | ||
daf5b0b6 JL |
2597 | static bool |
2598 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2599 | { | |
3f618223 JL |
2600 | /* |
2601 | * The select_sectype function should either return the vol->sectype | |
2602 | * that was specified, or "Unspecified" if that sectype was not | |
2603 | * compatible with the given NEGOTIATE request. | |
2604 | */ | |
ef65aaed SP |
2605 | if (server->ops->select_sectype(server, vol->sectype) |
2606 | == Unspecified) | |
daf5b0b6 | 2607 | return false; |
daf5b0b6 | 2608 | |
3f618223 JL |
2609 | /* |
2610 | * Now check if signing mode is acceptable. No need to check | |
2611 | * global_secflags at this point since if MUST_SIGN is set then | |
2612 | * the server->sign had better be too. | |
2613 | */ | |
38d77c50 JL |
2614 | if (vol->sign && !server->sign) |
2615 | return false; | |
daf5b0b6 JL |
2616 | |
2617 | return true; | |
2618 | } | |
2619 | ||
9fa114f7 | 2620 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2621 | { |
9fa114f7 JL |
2622 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2623 | ||
a0b3df5c JL |
2624 | if (vol->nosharesock) |
2625 | return 0; | |
2626 | ||
43cdae88 SF |
2627 | /* If multidialect negotiation see if existing sessions match one */ |
2628 | if (strcmp(vol->vals->version_string, SMB3ANY_VERSION_STRING) == 0) { | |
2629 | if (server->vals->protocol_id < SMB30_PROT_ID) | |
2630 | return 0; | |
2631 | } else if (strcmp(vol->vals->version_string, | |
2632 | SMBDEFAULT_VERSION_STRING) == 0) { | |
2633 | if (server->vals->protocol_id < SMB21_PROT_ID) | |
2634 | return 0; | |
2635 | } else if ((server->vals != vol->vals) || (server->ops != vol->ops)) | |
23db65f5 JL |
2636 | return 0; |
2637 | ||
37bb04e5 PS |
2638 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2639 | return 0; | |
2640 | ||
2641 | if (!match_address(server, addr, | |
2642 | (struct sockaddr *)&vol->srcaddr)) | |
2643 | return 0; | |
2644 | ||
2645 | if (!match_port(server, addr)) | |
2646 | return 0; | |
2647 | ||
2648 | if (!match_security(server, vol)) | |
2649 | return 0; | |
2650 | ||
b782fcc1 | 2651 | if (server->echo_interval != vol->echo_interval * HZ) |
adfeb3e0 SF |
2652 | return 0; |
2653 | ||
8339dd32 LL |
2654 | if (server->rdma != vol->rdma) |
2655 | return 0; | |
2656 | ||
4f5c10f1 SF |
2657 | if (server->ignore_signature != vol->ignore_signature) |
2658 | return 0; | |
2659 | ||
563317ec SF |
2660 | if (server->min_offload != vol->min_offload) |
2661 | return 0; | |
2662 | ||
37bb04e5 PS |
2663 | return 1; |
2664 | } | |
2665 | ||
54be1f6c | 2666 | struct TCP_Server_Info * |
9fa114f7 | 2667 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2668 | { |
e7ddee90 | 2669 | struct TCP_Server_Info *server; |
e7ddee90 | 2670 | |
3f9bcca7 | 2671 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2672 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
3345bb44 PAS |
2673 | /* |
2674 | * Skip ses channels since they're only handled in lower layers | |
2675 | * (e.g. cifs_send_recv). | |
2676 | */ | |
2677 | if (server->is_channel || !match_server(server, vol)) | |
daf5b0b6 JL |
2678 | continue; |
2679 | ||
e7ddee90 | 2680 | ++server->srv_count; |
3f9bcca7 | 2681 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2682 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2683 | return server; |
1da177e4 | 2684 | } |
3f9bcca7 | 2685 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2686 | return NULL; |
2687 | } | |
1b20d672 | 2688 | |
53e0e11e PS |
2689 | void |
2690 | cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) | |
1da177e4 | 2691 | { |
a5c3e1c7 SF |
2692 | struct task_struct *task; |
2693 | ||
3f9bcca7 | 2694 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2695 | if (--server->srv_count > 0) { |
3f9bcca7 | 2696 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2697 | return; |
1da177e4 | 2698 | } |
1b20d672 | 2699 | |
f1d0c998 RL |
2700 | put_net(cifs_net_ns(server)); |
2701 | ||
e7ddee90 | 2702 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2703 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2704 | |
c74093b6 JL |
2705 | cancel_delayed_work_sync(&server->echo); |
2706 | ||
53e0e11e PS |
2707 | if (from_reconnect) |
2708 | /* | |
2709 | * Avoid deadlock here: reconnect work calls | |
2710 | * cifs_put_tcp_session() at its end. Need to be sure | |
2711 | * that reconnect work does nothing with server pointer after | |
2712 | * that step. | |
2713 | */ | |
2714 | cancel_delayed_work(&server->reconnect); | |
2715 | else | |
2716 | cancel_delayed_work_sync(&server->reconnect); | |
53e0e11e | 2717 | |
e7ddee90 JL |
2718 | spin_lock(&GlobalMid_Lock); |
2719 | server->tcpStatus = CifsExiting; | |
2720 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2721 | |
026e93dc | 2722 | cifs_crypto_secmech_release(server); |
488f1d2d SJ |
2723 | cifs_fscache_release_client_cookie(server); |
2724 | ||
21e73393 SP |
2725 | kfree(server->session_key.response); |
2726 | server->session_key.response = NULL; | |
2727 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2728 | |
2729 | task = xchg(&server->tsk, NULL); | |
2730 | if (task) | |
72abe3bc | 2731 | send_sig(SIGKILL, task, 1); |
1da177e4 LT |
2732 | } |
2733 | ||
d70e9fa5 | 2734 | struct TCP_Server_Info * |
63c038c2 JL |
2735 | cifs_get_tcp_session(struct smb_vol *volume_info) |
2736 | { | |
2737 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2738 | int rc; |
2739 | ||
f96637be | 2740 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2741 | |
2742 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2743 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2744 | if (tcp_ses) |
2745 | return tcp_ses; | |
2746 | ||
2747 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2748 | if (!tcp_ses) { | |
2749 | rc = -ENOMEM; | |
2750 | goto out_err; | |
2751 | } | |
2752 | ||
23db65f5 JL |
2753 | tcp_ses->ops = volume_info->ops; |
2754 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2755 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2756 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2757 | if (IS_ERR(tcp_ses->hostname)) { | |
2758 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2759 | goto out_err_crypto_release; |
63c038c2 JL |
2760 | } |
2761 | ||
8eecd1c2 PAS |
2762 | tcp_ses->noblockcnt = volume_info->rootfs; |
2763 | tcp_ses->noblocksnd = volume_info->noblocksnd || volume_info->rootfs; | |
63c038c2 | 2764 | tcp_ses->noautotune = volume_info->noautotune; |
6a5fa236 | 2765 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
8339dd32 | 2766 | tcp_ses->rdma = volume_info->rdma; |
fc40f9cf | 2767 | tcp_ses->in_flight = 0; |
1b63f184 | 2768 | tcp_ses->max_in_flight = 0; |
2d86dbc9 | 2769 | tcp_ses->credits = 1; |
63c038c2 JL |
2770 | init_waitqueue_head(&tcp_ses->response_q); |
2771 | init_waitqueue_head(&tcp_ses->request_q); | |
2772 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2773 | mutex_init(&tcp_ses->srv_mutex); | |
2774 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2775 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2776 | memcpy(tcp_ses->server_RFC1001_name, | |
2777 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2778 | tcp_ses->session_estab = false; |
63c038c2 | 2779 | tcp_ses->sequence_number = 0; |
5b964852 | 2780 | tcp_ses->reconnect_instance = 1; |
fda35943 | 2781 | tcp_ses->lstrp = jiffies; |
9fe5ff1c | 2782 | tcp_ses->compress_algorithm = cpu_to_le16(volume_info->compression); |
58fa015f | 2783 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2784 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2785 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2786 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
53e0e11e PS |
2787 | INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server); |
2788 | mutex_init(&tcp_ses->reconnect_mutex); | |
9fa114f7 JL |
2789 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2790 | sizeof(tcp_ses->srcaddr)); | |
2791 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2792 | sizeof(tcp_ses->dstaddr)); | |
bcc88801 AA |
2793 | if (volume_info->use_client_guid) |
2794 | memcpy(tcp_ses->client_guid, volume_info->client_guid, | |
2795 | SMB2_CLIENT_GUID_SIZE); | |
2796 | else | |
2797 | generate_random_uuid(tcp_ses->client_guid); | |
63c038c2 JL |
2798 | /* |
2799 | * at this point we are the only ones with the pointer | |
2800 | * to the struct since the kernel thread not created yet | |
2801 | * no need to spinlock this init of tcpStatus or srv_count | |
2802 | */ | |
2803 | tcp_ses->tcpStatus = CifsNew; | |
2804 | ++tcp_ses->srv_count; | |
2805 | ||
adfeb3e0 SF |
2806 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2807 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2808 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2809 | else | |
2810 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2f894646 LL |
2811 | if (tcp_ses->rdma) { |
2812 | #ifndef CONFIG_CIFS_SMB_DIRECT | |
2813 | cifs_dbg(VFS, "CONFIG_CIFS_SMB_DIRECT is not enabled\n"); | |
2814 | rc = -ENOENT; | |
2815 | goto out_err_crypto_release; | |
2816 | #endif | |
2817 | tcp_ses->smbd_conn = smbd_get_connection( | |
2818 | tcp_ses, (struct sockaddr *)&volume_info->dstaddr); | |
2819 | if (tcp_ses->smbd_conn) { | |
2820 | cifs_dbg(VFS, "RDMA transport established\n"); | |
2821 | rc = 0; | |
2822 | goto smbd_connected; | |
2823 | } else { | |
2824 | rc = -ENOENT; | |
2825 | goto out_err_crypto_release; | |
2826 | } | |
2827 | } | |
a9f1b85e | 2828 | rc = ip_connect(tcp_ses); |
63c038c2 | 2829 | if (rc < 0) { |
f96637be | 2830 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2831 | goto out_err_crypto_release; |
63c038c2 | 2832 | } |
2f894646 | 2833 | smbd_connected: |
63c038c2 JL |
2834 | /* |
2835 | * since we're in a cifs function already, we know that | |
2836 | * this will succeed. No need for try_module_get(). | |
2837 | */ | |
2838 | __module_get(THIS_MODULE); | |
7c97c200 | 2839 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2840 | tcp_ses, "cifsd"); |
2841 | if (IS_ERR(tcp_ses->tsk)) { | |
2842 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2843 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2844 | module_put(THIS_MODULE); |
f7c5445a | 2845 | goto out_err_crypto_release; |
63c038c2 | 2846 | } |
563317ec | 2847 | tcp_ses->min_offload = volume_info->min_offload; |
fd88ce93 | 2848 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 | 2849 | |
93d5cb51 | 2850 | tcp_ses->nr_targets = 1; |
4f5c10f1 | 2851 | tcp_ses->ignore_signature = volume_info->ignore_signature; |
63c038c2 | 2852 | /* thread spawned, put it on the list */ |
3f9bcca7 | 2853 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2854 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2855 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2856 | |
488f1d2d SJ |
2857 | cifs_fscache_get_client_cookie(tcp_ses); |
2858 | ||
c74093b6 | 2859 | /* queue echo request delayed work */ |
adfeb3e0 | 2860 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2861 | |
63c038c2 JL |
2862 | return tcp_ses; |
2863 | ||
f7c5445a | 2864 | out_err_crypto_release: |
026e93dc | 2865 | cifs_crypto_secmech_release(tcp_ses); |
d2b91521 | 2866 | |
f1d0c998 RL |
2867 | put_net(cifs_net_ns(tcp_ses)); |
2868 | ||
63c038c2 JL |
2869 | out_err: |
2870 | if (tcp_ses) { | |
8347a5cd SF |
2871 | if (!IS_ERR(tcp_ses->hostname)) |
2872 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2873 | if (tcp_ses->ssocket) |
2874 | sock_release(tcp_ses->ssocket); | |
2875 | kfree(tcp_ses); | |
2876 | } | |
2877 | return ERR_PTR(rc); | |
2878 | } | |
2879 | ||
96daf2b0 | 2880 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2881 | { |
3f618223 JL |
2882 | if (vol->sectype != Unspecified && |
2883 | vol->sectype != ses->sectype) | |
2884 | return 0; | |
2885 | ||
bcc88801 AA |
2886 | /* |
2887 | * If an existing session is limited to less channels than | |
2888 | * requested, it should not be reused | |
2889 | */ | |
2890 | if (ses->chan_max < vol->max_channels) | |
2891 | return 0; | |
2892 | ||
3f618223 | 2893 | switch (ses->sectype) { |
37bb04e5 | 2894 | case Kerberos: |
64ed39dd | 2895 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2896 | return 0; |
2897 | break; | |
2898 | default: | |
04febabc JL |
2899 | /* NULL username means anonymous session */ |
2900 | if (ses->user_name == NULL) { | |
2901 | if (!vol->nullauth) | |
2902 | return 0; | |
2903 | break; | |
2904 | } | |
2905 | ||
37bb04e5 | 2906 | /* anything else takes username/password */ |
04febabc JL |
2907 | if (strncmp(ses->user_name, |
2908 | vol->username ? vol->username : "", | |
8c3a2b4c | 2909 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2910 | return 0; |
08b37d51 | 2911 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2912 | ses->password != NULL && |
2913 | strncmp(ses->password, | |
2914 | vol->password ? vol->password : "", | |
8c3a2b4c | 2915 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2916 | return 0; |
2917 | } | |
2918 | return 1; | |
2919 | } | |
2920 | ||
b327a717 AA |
2921 | /** |
2922 | * cifs_setup_ipc - helper to setup the IPC tcon for the session | |
2923 | * | |
2924 | * A new IPC connection is made and stored in the session | |
2925 | * tcon_ipc. The IPC tcon has the same lifetime as the session. | |
2926 | */ | |
2927 | static int | |
2928 | cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) | |
2929 | { | |
2930 | int rc = 0, xid; | |
2931 | struct cifs_tcon *tcon; | |
2932 | struct nls_table *nls_codepage; | |
2933 | char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0}; | |
2934 | bool seal = false; | |
afe6f653 | 2935 | struct TCP_Server_Info *server = ses->server; |
b327a717 AA |
2936 | |
2937 | /* | |
2938 | * If the mount request that resulted in the creation of the | |
2939 | * session requires encryption, force IPC to be encrypted too. | |
2940 | */ | |
2941 | if (volume_info->seal) { | |
afe6f653 | 2942 | if (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) |
b327a717 AA |
2943 | seal = true; |
2944 | else { | |
afe6f653 | 2945 | cifs_server_dbg(VFS, |
b327a717 AA |
2946 | "IPC: server doesn't support encryption\n"); |
2947 | return -EOPNOTSUPP; | |
2948 | } | |
2949 | } | |
2950 | ||
2951 | tcon = tconInfoAlloc(); | |
2952 | if (tcon == NULL) | |
2953 | return -ENOMEM; | |
2954 | ||
afe6f653 | 2955 | scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", server->hostname); |
b327a717 AA |
2956 | |
2957 | /* cannot fail */ | |
2958 | nls_codepage = load_nls_default(); | |
2959 | ||
2960 | xid = get_xid(); | |
2961 | tcon->ses = ses; | |
2962 | tcon->ipc = true; | |
2963 | tcon->seal = seal; | |
afe6f653 | 2964 | rc = server->ops->tree_connect(xid, ses, unc, tcon, nls_codepage); |
b327a717 AA |
2965 | free_xid(xid); |
2966 | ||
2967 | if (rc) { | |
afe6f653 | 2968 | cifs_server_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc); |
b327a717 AA |
2969 | tconInfoFree(tcon); |
2970 | goto out; | |
2971 | } | |
2972 | ||
2973 | cifs_dbg(FYI, "IPC tcon rc = %d ipc tid = %d\n", rc, tcon->tid); | |
2974 | ||
2975 | ses->tcon_ipc = tcon; | |
2976 | out: | |
2977 | unload_nls(nls_codepage); | |
2978 | return rc; | |
2979 | } | |
2980 | ||
2981 | /** | |
2982 | * cifs_free_ipc - helper to release the session IPC tcon | |
2983 | * | |
2984 | * Needs to be called everytime a session is destroyed | |
2985 | */ | |
2986 | static int | |
2987 | cifs_free_ipc(struct cifs_ses *ses) | |
2988 | { | |
2989 | int rc = 0, xid; | |
2990 | struct cifs_tcon *tcon = ses->tcon_ipc; | |
2991 | ||
2992 | if (tcon == NULL) | |
2993 | return 0; | |
2994 | ||
2995 | if (ses->server->ops->tree_disconnect) { | |
2996 | xid = get_xid(); | |
2997 | rc = ses->server->ops->tree_disconnect(xid, tcon); | |
2998 | free_xid(xid); | |
2999 | } | |
3000 | ||
3001 | if (rc) | |
3002 | cifs_dbg(FYI, "failed to disconnect IPC tcon (rc=%d)\n", rc); | |
3003 | ||
3004 | tconInfoFree(tcon); | |
3005 | ses->tcon_ipc = NULL; | |
3006 | return rc; | |
3007 | } | |
3008 | ||
96daf2b0 | 3009 | static struct cifs_ses * |
4ff67b72 | 3010 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 3011 | { |
96daf2b0 | 3012 | struct cifs_ses *ses; |
dea570e0 | 3013 | |
3f9bcca7 | 3014 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 3015 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
3016 | if (ses->status == CifsExiting) |
3017 | continue; | |
37bb04e5 PS |
3018 | if (!match_session(ses, vol)) |
3019 | continue; | |
14fbf50d | 3020 | ++ses->ses_count; |
3f9bcca7 | 3021 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
3022 | return ses; |
3023 | } | |
3f9bcca7 | 3024 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
3025 | return NULL; |
3026 | } | |
dea570e0 | 3027 | |
5072010c | 3028 | void cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 3029 | { |
7f48558e | 3030 | unsigned int rc, xid; |
14fbf50d | 3031 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 3032 | |
f96637be | 3033 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 3034 | |
3f9bcca7 | 3035 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
3036 | if (ses->status == CifsExiting) { |
3037 | spin_unlock(&cifs_tcp_ses_lock); | |
3038 | return; | |
3039 | } | |
14fbf50d | 3040 | if (--ses->ses_count > 0) { |
3f9bcca7 | 3041 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
3042 | return; |
3043 | } | |
7f48558e SP |
3044 | if (ses->status == CifsGood) |
3045 | ses->status = CifsExiting; | |
3f9bcca7 | 3046 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 3047 | |
b327a717 AA |
3048 | cifs_free_ipc(ses); |
3049 | ||
7f48558e | 3050 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 3051 | xid = get_xid(); |
7f48558e SP |
3052 | rc = server->ops->logoff(xid, ses); |
3053 | if (rc) | |
afe6f653 | 3054 | cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n", |
7f48558e | 3055 | __func__, rc); |
6d5786a3 | 3056 | _free_xid(xid); |
14fbf50d | 3057 | } |
7f48558e SP |
3058 | |
3059 | spin_lock(&cifs_tcp_ses_lock); | |
3060 | list_del_init(&ses->smb_ses_list); | |
3061 | spin_unlock(&cifs_tcp_ses_lock); | |
3062 | ||
d70e9fa5 AA |
3063 | /* close any extra channels */ |
3064 | if (ses->chan_count > 1) { | |
3065 | int i; | |
3066 | ||
3067 | for (i = 1; i < ses->chan_count; i++) | |
3068 | cifs_put_tcp_session(ses->chans[i].server, 0); | |
3069 | } | |
3070 | ||
14fbf50d | 3071 | sesInfoFree(ses); |
53e0e11e | 3072 | cifs_put_tcp_session(server, 0); |
14fbf50d | 3073 | } |
dea570e0 | 3074 | |
8a8798a5 JL |
3075 | #ifdef CONFIG_KEYS |
3076 | ||
057d6332 CG |
3077 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
3078 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
3079 | |
3080 | /* Populate username and pw fields from keyring if possible */ | |
3081 | static int | |
3082 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
3083 | { | |
3084 | int rc = 0; | |
f2aee329 | 3085 | int is_domain = 0; |
146aa8b1 DH |
3086 | const char *delim, *payload; |
3087 | char *desc; | |
8a8798a5 JL |
3088 | ssize_t len; |
3089 | struct key *key; | |
3090 | struct TCP_Server_Info *server = ses->server; | |
3091 | struct sockaddr_in *sa; | |
3092 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 3093 | const struct user_key_payload *upayload; |
8a8798a5 JL |
3094 | |
3095 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
3096 | if (!desc) | |
3097 | return -ENOMEM; | |
3098 | ||
3099 | /* try to find an address key first */ | |
3100 | switch (server->dstaddr.ss_family) { | |
3101 | case AF_INET: | |
3102 | sa = (struct sockaddr_in *)&server->dstaddr; | |
3103 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
3104 | break; | |
3105 | case AF_INET6: | |
3106 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
3107 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
3108 | break; | |
3109 | default: | |
f96637be JP |
3110 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
3111 | server->dstaddr.ss_family); | |
8a8798a5 JL |
3112 | rc = -EINVAL; |
3113 | goto out_err; | |
3114 | } | |
3115 | ||
f96637be | 3116 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
028db3e2 | 3117 | key = request_key(&key_type_logon, desc, ""); |
8a8798a5 JL |
3118 | if (IS_ERR(key)) { |
3119 | if (!ses->domainName) { | |
f96637be | 3120 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
3121 | rc = PTR_ERR(key); |
3122 | goto out_err; | |
3123 | } | |
3124 | ||
3125 | /* didn't work, try to find a domain key */ | |
3126 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 3127 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
028db3e2 | 3128 | key = request_key(&key_type_logon, desc, ""); |
8a8798a5 JL |
3129 | if (IS_ERR(key)) { |
3130 | rc = PTR_ERR(key); | |
3131 | goto out_err; | |
3132 | } | |
f2aee329 | 3133 | is_domain = 1; |
8a8798a5 JL |
3134 | } |
3135 | ||
3136 | down_read(&key->sem); | |
0837e49a | 3137 | upayload = user_key_payload_locked(key); |
8a8798a5 | 3138 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 3139 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
3140 | goto out_key_put; |
3141 | } | |
3142 | ||
3143 | /* find first : in payload */ | |
146aa8b1 | 3144 | payload = upayload->data; |
8a8798a5 | 3145 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 3146 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 3147 | if (!delim) { |
f96637be JP |
3148 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
3149 | upayload->datalen); | |
8a8798a5 JL |
3150 | rc = -EINVAL; |
3151 | goto out_key_put; | |
3152 | } | |
3153 | ||
3154 | len = delim - payload; | |
8c3a2b4c | 3155 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
3156 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
3157 | len); | |
8a8798a5 JL |
3158 | rc = -EINVAL; |
3159 | goto out_key_put; | |
3160 | } | |
3161 | ||
3162 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
3163 | if (!vol->username) { | |
f96637be JP |
3164 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
3165 | len); | |
8a8798a5 JL |
3166 | rc = -ENOMEM; |
3167 | goto out_key_put; | |
3168 | } | |
f96637be | 3169 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
3170 | |
3171 | len = key->datalen - (len + 1); | |
8c3a2b4c | 3172 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 3173 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
3174 | rc = -EINVAL; |
3175 | kfree(vol->username); | |
3176 | vol->username = NULL; | |
3177 | goto out_key_put; | |
3178 | } | |
3179 | ||
3180 | ++delim; | |
3181 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
3182 | if (!vol->password) { | |
f96637be JP |
3183 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
3184 | len); | |
8a8798a5 JL |
3185 | rc = -ENOMEM; |
3186 | kfree(vol->username); | |
3187 | vol->username = NULL; | |
3188 | goto out_key_put; | |
3189 | } | |
3190 | ||
f2aee329 RS |
3191 | /* |
3192 | * If we have a domain key then we must set the domainName in the | |
3193 | * for the request. | |
3194 | */ | |
3195 | if (is_domain && ses->domainName) { | |
3196 | vol->domainname = kstrndup(ses->domainName, | |
3197 | strlen(ses->domainName), | |
3198 | GFP_KERNEL); | |
3199 | if (!vol->domainname) { | |
3200 | cifs_dbg(FYI, "Unable to allocate %zd bytes for " | |
3201 | "domain\n", len); | |
3202 | rc = -ENOMEM; | |
3203 | kfree(vol->username); | |
3204 | vol->username = NULL; | |
478228e5 | 3205 | kzfree(vol->password); |
f2aee329 RS |
3206 | vol->password = NULL; |
3207 | goto out_key_put; | |
3208 | } | |
3209 | } | |
3210 | ||
8a8798a5 JL |
3211 | out_key_put: |
3212 | up_read(&key->sem); | |
3213 | key_put(key); | |
3214 | out_err: | |
3215 | kfree(desc); | |
f96637be | 3216 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
3217 | return rc; |
3218 | } | |
3219 | #else /* ! CONFIG_KEYS */ | |
3220 | static inline int | |
3221 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
3222 | struct cifs_ses *ses __attribute__((unused))) | |
3223 | { | |
3224 | return -ENOSYS; | |
3225 | } | |
3226 | #endif /* CONFIG_KEYS */ | |
3227 | ||
4a1360d0 AA |
3228 | /** |
3229 | * cifs_get_smb_ses - get a session matching @volume_info data from @server | |
3230 | * | |
3231 | * This function assumes it is being called from cifs_mount() where we | |
3232 | * already got a server reference (server refcount +1). See | |
3233 | * cifs_get_tcon() for refcount explanations. | |
3234 | */ | |
5072010c | 3235 | struct cifs_ses * |
36988c76 JL |
3236 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
3237 | { | |
286170aa PS |
3238 | int rc = -ENOMEM; |
3239 | unsigned int xid; | |
96daf2b0 | 3240 | struct cifs_ses *ses; |
a9f1b85e PS |
3241 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
3242 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 3243 | |
6d5786a3 | 3244 | xid = get_xid(); |
36988c76 | 3245 | |
4ff67b72 | 3246 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 3247 | if (ses) { |
f96637be JP |
3248 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
3249 | ses->status); | |
36988c76 | 3250 | |
36988c76 | 3251 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
3252 | rc = cifs_negotiate_protocol(xid, ses); |
3253 | if (rc) { | |
3254 | mutex_unlock(&ses->session_mutex); | |
3255 | /* problem -- put our ses reference */ | |
3256 | cifs_put_smb_ses(ses); | |
6d5786a3 | 3257 | free_xid(xid); |
198b5682 JL |
3258 | return ERR_PTR(rc); |
3259 | } | |
36988c76 | 3260 | if (ses->need_reconnect) { |
f96637be | 3261 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
3262 | rc = cifs_setup_session(xid, ses, |
3263 | volume_info->local_nls); | |
3264 | if (rc) { | |
3265 | mutex_unlock(&ses->session_mutex); | |
3266 | /* problem -- put our reference */ | |
3267 | cifs_put_smb_ses(ses); | |
6d5786a3 | 3268 | free_xid(xid); |
36988c76 JL |
3269 | return ERR_PTR(rc); |
3270 | } | |
3271 | } | |
3272 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
3273 | |
3274 | /* existing SMB ses has a server reference already */ | |
53e0e11e | 3275 | cifs_put_tcp_session(server, 0); |
6d5786a3 | 3276 | free_xid(xid); |
36988c76 JL |
3277 | return ses; |
3278 | } | |
3279 | ||
f96637be | 3280 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
3281 | ses = sesInfoAlloc(); |
3282 | if (ses == NULL) | |
3283 | goto get_ses_fail; | |
3284 | ||
3285 | /* new SMB session uses our server ref */ | |
3286 | ses->server = server; | |
a9f1b85e PS |
3287 | if (server->dstaddr.ss_family == AF_INET6) |
3288 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 3289 | else |
a9f1b85e | 3290 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 3291 | |
8727c8a8 SF |
3292 | if (volume_info->username) { |
3293 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
3294 | if (!ses->user_name) | |
3295 | goto get_ses_fail; | |
3296 | } | |
36988c76 JL |
3297 | |
3298 | /* volume_info->password freed at unmount */ | |
3299 | if (volume_info->password) { | |
3300 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
3301 | if (!ses->password) | |
3302 | goto get_ses_fail; | |
3303 | } | |
3304 | if (volume_info->domainname) { | |
d3686d54 SP |
3305 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
3306 | if (!ses->domainName) | |
3307 | goto get_ses_fail; | |
36988c76 | 3308 | } |
39566443 GP |
3309 | if (volume_info->domainauto) |
3310 | ses->domainAuto = volume_info->domainauto; | |
3e4b3e1f | 3311 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 3312 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 3313 | |
28e11bd8 JL |
3314 | ses->sectype = volume_info->sectype; |
3315 | ses->sign = volume_info->sign; | |
36988c76 | 3316 | mutex_lock(&ses->session_mutex); |
d70e9fa5 AA |
3317 | |
3318 | /* add server as first channel */ | |
3319 | ses->chans[0].server = server; | |
3320 | ses->chan_count = 1; | |
3321 | ses->chan_max = volume_info->multichannel ? volume_info->max_channels:1; | |
3322 | ||
198b5682 JL |
3323 | rc = cifs_negotiate_protocol(xid, ses); |
3324 | if (!rc) | |
3325 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
d70e9fa5 AA |
3326 | |
3327 | /* each channel uses a different signing key */ | |
3328 | memcpy(ses->chans[0].signkey, ses->smb3signingkey, | |
3329 | sizeof(ses->smb3signingkey)); | |
3330 | ||
36988c76 | 3331 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 3332 | if (rc) |
36988c76 JL |
3333 | goto get_ses_fail; |
3334 | ||
d70e9fa5 | 3335 | /* success, put it on the list and add it as first channel */ |
3f9bcca7 | 3336 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 3337 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 3338 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 3339 | |
6d5786a3 | 3340 | free_xid(xid); |
b327a717 AA |
3341 | |
3342 | cifs_setup_ipc(ses, volume_info); | |
3343 | ||
36988c76 JL |
3344 | return ses; |
3345 | ||
3346 | get_ses_fail: | |
3347 | sesInfoFree(ses); | |
6d5786a3 | 3348 | free_xid(xid); |
36988c76 JL |
3349 | return ERR_PTR(rc); |
3350 | } | |
3351 | ||
ae6f8dd4 | 3352 | static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
37bb04e5 PS |
3353 | { |
3354 | if (tcon->tidStatus == CifsExiting) | |
3355 | return 0; | |
ae6f8dd4 | 3356 | if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE)) |
37bb04e5 | 3357 | return 0; |
ae6f8dd4 PS |
3358 | if (tcon->seal != volume_info->seal) |
3359 | return 0; | |
ae6f8dd4 PS |
3360 | if (tcon->snapshot_time != volume_info->snapshot_time) |
3361 | return 0; | |
ca567eb2 SF |
3362 | if (tcon->handle_timeout != volume_info->handle_timeout) |
3363 | return 0; | |
3e7a02d4 SF |
3364 | if (tcon->no_lease != volume_info->no_lease) |
3365 | return 0; | |
37bb04e5 PS |
3366 | return 1; |
3367 | } | |
3368 | ||
96daf2b0 | 3369 | static struct cifs_tcon * |
8b217fe7 | 3370 | cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
f1987b44 JL |
3371 | { |
3372 | struct list_head *tmp; | |
96daf2b0 | 3373 | struct cifs_tcon *tcon; |
f1987b44 | 3374 | |
3f9bcca7 | 3375 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 3376 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 3377 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
65303de8 PA |
3378 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3379 | if (tcon->dfs_path) | |
3380 | continue; | |
3381 | #endif | |
ae6f8dd4 | 3382 | if (!match_tcon(tcon, volume_info)) |
f1987b44 | 3383 | continue; |
f1987b44 | 3384 | ++tcon->tc_count; |
3f9bcca7 | 3385 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 3386 | return tcon; |
1da177e4 | 3387 | } |
3f9bcca7 | 3388 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
3389 | return NULL; |
3390 | } | |
3391 | ||
53e0e11e | 3392 | void |
96daf2b0 | 3393 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 3394 | { |
2e6e02ab | 3395 | unsigned int xid; |
b327a717 | 3396 | struct cifs_ses *ses; |
f1987b44 | 3397 | |
b327a717 AA |
3398 | /* |
3399 | * IPC tcon share the lifetime of their session and are | |
3400 | * destroyed in the session put function | |
3401 | */ | |
3402 | if (tcon == NULL || tcon->ipc) | |
3403 | return; | |
3404 | ||
3405 | ses = tcon->ses; | |
f96637be | 3406 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 3407 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 3408 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 3409 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
3410 | return; |
3411 | } | |
3412 | ||
3413 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 3414 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 3415 | |
6d5786a3 | 3416 | xid = get_xid(); |
2e6e02ab PS |
3417 | if (ses->server->ops->tree_disconnect) |
3418 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 3419 | _free_xid(xid); |
f1987b44 | 3420 | |
d03382ce | 3421 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 3422 | tconInfoFree(tcon); |
f1987b44 JL |
3423 | cifs_put_smb_ses(ses); |
3424 | } | |
3425 | ||
4a1360d0 AA |
3426 | /** |
3427 | * cifs_get_tcon - get a tcon matching @volume_info data from @ses | |
3428 | * | |
3429 | * - tcon refcount is the number of mount points using the tcon. | |
3430 | * - ses refcount is the number of tcon using the session. | |
3431 | * | |
3432 | * 1. This function assumes it is being called from cifs_mount() where | |
3433 | * we already got a session reference (ses refcount +1). | |
3434 | * | |
3435 | * 2. Since we're in the context of adding a mount point, the end | |
3436 | * result should be either: | |
3437 | * | |
3438 | * a) a new tcon already allocated with refcount=1 (1 mount point) and | |
3439 | * its session refcount incremented (1 new tcon). This +1 was | |
3440 | * already done in (1). | |
3441 | * | |
3442 | * b) an existing tcon with refcount+1 (add a mount point to it) and | |
3443 | * identical ses refcount (no new tcon). Because of (1) we need to | |
3444 | * decrement the ses refcount. | |
3445 | */ | |
96daf2b0 SF |
3446 | static struct cifs_tcon * |
3447 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
3448 | { |
3449 | int rc, xid; | |
96daf2b0 | 3450 | struct cifs_tcon *tcon; |
d00c28de | 3451 | |
8b217fe7 | 3452 | tcon = cifs_find_tcon(ses, volume_info); |
d00c28de | 3453 | if (tcon) { |
4a1360d0 AA |
3454 | /* |
3455 | * tcon has refcount already incremented but we need to | |
3456 | * decrement extra ses reference gotten by caller (case b) | |
3457 | */ | |
f96637be | 3458 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de | 3459 | cifs_put_smb_ses(ses); |
d00c28de JL |
3460 | return tcon; |
3461 | } | |
3462 | ||
2e6e02ab PS |
3463 | if (!ses->server->ops->tree_connect) { |
3464 | rc = -ENOSYS; | |
3465 | goto out_fail; | |
3466 | } | |
3467 | ||
d00c28de JL |
3468 | tcon = tconInfoAlloc(); |
3469 | if (tcon == NULL) { | |
3470 | rc = -ENOMEM; | |
3471 | goto out_fail; | |
3472 | } | |
3473 | ||
8b217fe7 | 3474 | if (volume_info->snapshot_time) { |
8b217fe7 SF |
3475 | if (ses->server->vals->protocol_id == 0) { |
3476 | cifs_dbg(VFS, | |
3477 | "Use SMB2 or later for snapshot mount option\n"); | |
3478 | rc = -EOPNOTSUPP; | |
3479 | goto out_fail; | |
3480 | } else | |
3481 | tcon->snapshot_time = volume_info->snapshot_time; | |
8b217fe7 SF |
3482 | } |
3483 | ||
ca567eb2 SF |
3484 | if (volume_info->handle_timeout) { |
3485 | if (ses->server->vals->protocol_id == 0) { | |
3486 | cifs_dbg(VFS, | |
3487 | "Use SMB2.1 or later for handle timeout option\n"); | |
3488 | rc = -EOPNOTSUPP; | |
3489 | goto out_fail; | |
3490 | } else | |
3491 | tcon->handle_timeout = volume_info->handle_timeout; | |
3492 | } | |
3493 | ||
d00c28de JL |
3494 | tcon->ses = ses; |
3495 | if (volume_info->password) { | |
3496 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
3497 | if (!tcon->password) { | |
3498 | rc = -ENOMEM; | |
3499 | goto out_fail; | |
3500 | } | |
3501 | } | |
3502 | ||
23657ad7 SF |
3503 | if (volume_info->seal) { |
3504 | if (ses->server->vals->protocol_id == 0) { | |
3505 | cifs_dbg(VFS, | |
3506 | "SMB3 or later required for encryption\n"); | |
3507 | rc = -EOPNOTSUPP; | |
3508 | goto out_fail; | |
3509 | } else if (tcon->ses->server->capabilities & | |
3510 | SMB2_GLOBAL_CAP_ENCRYPTION) | |
3511 | tcon->seal = true; | |
3512 | else { | |
3513 | cifs_dbg(VFS, "Encryption is not supported on share\n"); | |
3514 | rc = -EOPNOTSUPP; | |
3515 | goto out_fail; | |
3516 | } | |
3517 | } | |
3518 | ||
8505c8bf SF |
3519 | if (volume_info->linux_ext) { |
3520 | if (ses->server->posix_ext_supported) { | |
b326614e | 3521 | tcon->posix_extensions = true; |
2fbb5644 SF |
3522 | printk_once(KERN_WARNING |
3523 | "SMB3.11 POSIX Extensions are experimental\n"); | |
8505c8bf SF |
3524 | } else { |
3525 | cifs_dbg(VFS, "Server does not support mounting with posix SMB3.11 extensions.\n"); | |
3526 | rc = -EOPNOTSUPP; | |
3527 | goto out_fail; | |
2fbb5644 | 3528 | } |
b326614e | 3529 | } |
b326614e | 3530 | |
2e6e02ab PS |
3531 | /* |
3532 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
3533 | * SetFS as we do on SessSetup and reconnect? | |
3534 | */ | |
6d5786a3 | 3535 | xid = get_xid(); |
2e6e02ab PS |
3536 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
3537 | volume_info->local_nls); | |
6d5786a3 | 3538 | free_xid(xid); |
f96637be | 3539 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
3540 | if (rc) |
3541 | goto out_fail; | |
3542 | ||
b618f001 SF |
3543 | tcon->use_persistent = false; |
3544 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
3545 | if (volume_info->persistent) { | |
3546 | if (ses->server->vals->protocol_id == 0) { | |
3547 | cifs_dbg(VFS, | |
3548 | "SMB3 or later required for persistent handles\n"); | |
3549 | rc = -EOPNOTSUPP; | |
3550 | goto out_fail; | |
3551 | } else if (ses->server->capabilities & | |
3552 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
3553 | tcon->use_persistent = true; | |
3554 | else /* persistent handles requested but not supported */ { | |
3555 | cifs_dbg(VFS, | |
3556 | "Persistent handles not supported on share\n"); | |
3557 | rc = -EOPNOTSUPP; | |
3558 | goto out_fail; | |
3559 | } | |
3560 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) | |
3561 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
3562 | && (volume_info->nopersistent == false)) { | |
3563 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
3564 | tcon->use_persistent = true; | |
592fafe6 SF |
3565 | } else if (volume_info->resilient) { |
3566 | if (ses->server->vals->protocol_id == 0) { | |
3567 | cifs_dbg(VFS, | |
3568 | "SMB2.1 or later required for resilient handles\n"); | |
3569 | rc = -EOPNOTSUPP; | |
3570 | goto out_fail; | |
3571 | } | |
3572 | tcon->use_resilient = true; | |
b618f001 SF |
3573 | } |
3574 | ||
cae53f70 SF |
3575 | /* If the user really knows what they are doing they can override */ |
3576 | if (tcon->share_flags & SMB2_SHAREFLAG_NO_CACHING) { | |
3577 | if (volume_info->cache_ro) | |
3578 | cifs_dbg(VFS, "cache=ro requested on mount but NO_CACHING flag set on share\n"); | |
3579 | else if (volume_info->cache_rw) | |
3580 | cifs_dbg(VFS, "cache=singleclient requested on mount but NO_CACHING flag set on share\n"); | |
3581 | } | |
3582 | ||
2e6e02ab PS |
3583 | /* |
3584 | * We can have only one retry value for a connection to a share so for | |
3585 | * resources mounted more than once to the same server share the last | |
3586 | * value passed in for the retry flag is used. | |
3587 | */ | |
d00c28de JL |
3588 | tcon->retry = volume_info->retry; |
3589 | tcon->nocase = volume_info->nocase; | |
3d4ef9a1 | 3590 | tcon->nohandlecache = volume_info->nohandlecache; |
d00c28de | 3591 | tcon->local_lease = volume_info->local_lease; |
3e7a02d4 | 3592 | tcon->no_lease = volume_info->no_lease; |
233839b1 | 3593 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 3594 | |
3f9bcca7 | 3595 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 3596 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 3597 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 3598 | |
d03382ce SJ |
3599 | cifs_fscache_get_super_cookie(tcon); |
3600 | ||
d00c28de JL |
3601 | return tcon; |
3602 | ||
3603 | out_fail: | |
3604 | tconInfoFree(tcon); | |
3605 | return ERR_PTR(rc); | |
3606 | } | |
3607 | ||
9d002df4 JL |
3608 | void |
3609 | cifs_put_tlink(struct tcon_link *tlink) | |
3610 | { | |
3611 | if (!tlink || IS_ERR(tlink)) | |
3612 | return; | |
3613 | ||
3614 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
3615 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
3616 | tlink->tl_time = jiffies; | |
3617 | return; | |
3618 | } | |
3619 | ||
3620 | if (!IS_ERR(tlink_tcon(tlink))) | |
3621 | cifs_put_tcon(tlink_tcon(tlink)); | |
3622 | kfree(tlink); | |
3623 | return; | |
3624 | } | |
d00c28de | 3625 | |
25c7f41e PS |
3626 | static int |
3627 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3628 | { | |
3629 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3630 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
29fbeb7a PAS |
3631 | unsigned int oldflags = old->mnt_cifs_flags & CIFS_MOUNT_MASK; |
3632 | unsigned int newflags = new->mnt_cifs_flags & CIFS_MOUNT_MASK; | |
25c7f41e PS |
3633 | |
3634 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
3635 | return 0; | |
3636 | ||
29fbeb7a PAS |
3637 | if (old->mnt_cifs_serverino_autodisabled) |
3638 | newflags &= ~CIFS_MOUNT_SERVER_INUM; | |
3639 | ||
3640 | if (oldflags != newflags) | |
25c7f41e PS |
3641 | return 0; |
3642 | ||
25c7f41e | 3643 | /* |
5eba8ab3 JL |
3644 | * We want to share sb only if we don't specify an r/wsize or |
3645 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
3646 | */ |
3647 | if (new->wsize && new->wsize < old->wsize) | |
3648 | return 0; | |
3649 | ||
5eba8ab3 JL |
3650 | if (new->rsize && new->rsize < old->rsize) |
3651 | return 0; | |
3652 | ||
1f68233c | 3653 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
3654 | return 0; |
3655 | ||
3656 | if (old->mnt_file_mode != new->mnt_file_mode || | |
3657 | old->mnt_dir_mode != new->mnt_dir_mode) | |
3658 | return 0; | |
3659 | ||
3660 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
3661 | return 0; | |
3662 | ||
3663 | if (old->actimeo != new->actimeo) | |
3664 | return 0; | |
3665 | ||
3666 | return 1; | |
3667 | } | |
3668 | ||
c1d8b24d SP |
3669 | static int |
3670 | match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3671 | { | |
3672 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3673 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
fe129268 RS |
3674 | bool old_set = (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) && |
3675 | old->prepath; | |
3676 | bool new_set = (new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) && | |
3677 | new->prepath; | |
c1d8b24d | 3678 | |
cd8c4296 | 3679 | if (old_set && new_set && !strcmp(new->prepath, old->prepath)) |
c1d8b24d | 3680 | return 1; |
cd8c4296 SP |
3681 | else if (!old_set && !new_set) |
3682 | return 1; | |
3683 | ||
c1d8b24d SP |
3684 | return 0; |
3685 | } | |
3686 | ||
25c7f41e PS |
3687 | int |
3688 | cifs_match_super(struct super_block *sb, void *data) | |
3689 | { | |
3690 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
3691 | struct smb_vol *volume_info; | |
3692 | struct cifs_sb_info *cifs_sb; | |
3693 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
3694 | struct cifs_ses *ses; |
3695 | struct cifs_tcon *tcon; | |
25c7f41e | 3696 | struct tcon_link *tlink; |
25c7f41e PS |
3697 | int rc = 0; |
3698 | ||
25c7f41e PS |
3699 | spin_lock(&cifs_tcp_ses_lock); |
3700 | cifs_sb = CIFS_SB(sb); | |
3701 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3702 | if (IS_ERR(tlink)) { | |
3703 | spin_unlock(&cifs_tcp_ses_lock); | |
3704 | return rc; | |
3705 | } | |
3706 | tcon = tlink_tcon(tlink); | |
3707 | ses = tcon->ses; | |
3708 | tcp_srv = ses->server; | |
3709 | ||
3710 | volume_info = mnt_data->vol; | |
3711 | ||
9fa114f7 | 3712 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e | 3713 | !match_session(ses, volume_info) || |
ae6f8dd4 | 3714 | !match_tcon(tcon, volume_info) || |
c1d8b24d | 3715 | !match_prepath(sb, mnt_data)) { |
25c7f41e PS |
3716 | rc = 0; |
3717 | goto out; | |
3718 | } | |
3719 | ||
3720 | rc = compare_mount_options(sb, mnt_data); | |
3721 | out: | |
25c7f41e | 3722 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 3723 | cifs_put_tlink(tlink); |
25c7f41e PS |
3724 | return rc; |
3725 | } | |
3726 | ||
09e50d55 JL |
3727 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
3728 | static struct lock_class_key cifs_key[2]; | |
3729 | static struct lock_class_key cifs_slock_key[2]; | |
3730 | ||
3731 | static inline void | |
3732 | cifs_reclassify_socket4(struct socket *sock) | |
3733 | { | |
3734 | struct sock *sk = sock->sk; | |
fafc4e1e | 3735 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3736 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
3737 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
3738 | } | |
3739 | ||
3740 | static inline void | |
3741 | cifs_reclassify_socket6(struct socket *sock) | |
3742 | { | |
3743 | struct sock *sk = sock->sk; | |
fafc4e1e | 3744 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3745 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
3746 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
3747 | } | |
3748 | #else | |
3749 | static inline void | |
3750 | cifs_reclassify_socket4(struct socket *sock) | |
3751 | { | |
3752 | } | |
3753 | ||
3754 | static inline void | |
3755 | cifs_reclassify_socket6(struct socket *sock) | |
3756 | { | |
3757 | } | |
3758 | #endif | |
3759 | ||
1da177e4 | 3760 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 3761 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 3762 | { |
50c2f753 | 3763 | unsigned int i, j; |
1da177e4 | 3764 | |
50c2f753 | 3765 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
3766 | /* mask a nibble at a time and encode */ |
3767 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
3768 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 3769 | j += 2; |
1da177e4 LT |
3770 | } |
3771 | ||
3772 | } | |
3773 | ||
3eb9a889 BG |
3774 | static int |
3775 | bind_socket(struct TCP_Server_Info *server) | |
3776 | { | |
3777 | int rc = 0; | |
3778 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3779 | /* Bind to the specified local IP address */ | |
3780 | struct socket *socket = server->ssocket; | |
3781 | rc = socket->ops->bind(socket, | |
3782 | (struct sockaddr *) &server->srcaddr, | |
3783 | sizeof(server->srcaddr)); | |
3784 | if (rc < 0) { | |
3785 | struct sockaddr_in *saddr4; | |
3786 | struct sockaddr_in6 *saddr6; | |
3787 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3788 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3789 | if (saddr6->sin6_family == AF_INET6) | |
afe6f653 | 3790 | cifs_server_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
f96637be | 3791 | &saddr6->sin6_addr, rc); |
3eb9a889 | 3792 | else |
afe6f653 | 3793 | cifs_server_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
f96637be | 3794 | &saddr4->sin_addr.s_addr, rc); |
3eb9a889 BG |
3795 | } |
3796 | } | |
3797 | return rc; | |
3798 | } | |
1da177e4 LT |
3799 | |
3800 | static int | |
a9f1b85e | 3801 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3802 | { |
3803 | int rc = 0; | |
a9f1b85e PS |
3804 | /* |
3805 | * some servers require RFC1001 sessinit before sending | |
3806 | * negprot - BB check reconnection in case where second | |
3807 | * sessinit is sent but no second negprot | |
3808 | */ | |
3809 | struct rfc1002_session_packet *ses_init_buf; | |
3810 | struct smb_hdr *smb_buf; | |
3811 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3812 | GFP_KERNEL); | |
3813 | if (ses_init_buf) { | |
3814 | ses_init_buf->trailer.session_req.called_len = 32; | |
3815 | ||
997152f6 | 3816 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
3817 | rfc1002mangle(ses_init_buf->trailer. |
3818 | session_req.called_name, | |
3819 | server->server_RFC1001_name, | |
3820 | RFC1001_NAME_LEN_WITH_NULL); | |
3821 | else | |
3822 | rfc1002mangle(ses_init_buf->trailer. | |
3823 | session_req.called_name, | |
3824 | DEFAULT_CIFS_CALLED_NAME, | |
3825 | RFC1001_NAME_LEN_WITH_NULL); | |
3826 | ||
3827 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3828 | ||
3829 | /* | |
3830 | * calling name ends in null (byte 16) from old smb | |
3831 | * convention. | |
3832 | */ | |
c85c35f8 | 3833 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
3834 | rfc1002mangle(ses_init_buf->trailer. |
3835 | session_req.calling_name, | |
3836 | server->workstation_RFC1001_name, | |
3837 | RFC1001_NAME_LEN_WITH_NULL); | |
3838 | else | |
3839 | rfc1002mangle(ses_init_buf->trailer. | |
3840 | session_req.calling_name, | |
3841 | "LINUX_CIFS_CLNT", | |
3842 | RFC1001_NAME_LEN_WITH_NULL); | |
3843 | ||
3844 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3845 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3846 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3847 | ||
3848 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3849 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3850 | rc = smb_send(server, smb_buf, 0x44); |
3851 | kfree(ses_init_buf); | |
3852 | /* | |
3853 | * RFC1001 layer in at least one server | |
3854 | * requires very short break before negprot | |
3855 | * presumably because not expecting negprot | |
3856 | * to follow so fast. This is a simple | |
3857 | * solution that works without | |
3858 | * complicating the code and causes no | |
3859 | * significant slowing down on mount | |
3860 | * for everyone else | |
3861 | */ | |
3862 | usleep_range(1000, 2000); | |
3863 | } | |
3864 | /* | |
3865 | * else the negprot may still work without this | |
3866 | * even though malloc failed | |
3867 | */ | |
3868 | ||
3869 | return rc; | |
3870 | } | |
3871 | ||
3872 | static int | |
3873 | generic_ip_connect(struct TCP_Server_Info *server) | |
3874 | { | |
3875 | int rc = 0; | |
6da97910 | 3876 | __be16 sport; |
a9f1b85e | 3877 | int slen, sfamily; |
bcf4b106 | 3878 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3879 | struct sockaddr *saddr; |
3880 | ||
3881 | saddr = (struct sockaddr *) &server->dstaddr; | |
3882 | ||
3883 | if (server->dstaddr.ss_family == AF_INET6) { | |
3884 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3885 | slen = sizeof(struct sockaddr_in6); | |
3886 | sfamily = AF_INET6; | |
3887 | } else { | |
3888 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3889 | slen = sizeof(struct sockaddr_in); | |
3890 | sfamily = AF_INET; | |
3891 | } | |
1da177e4 | 3892 | |
bcf4b106 | 3893 | if (socket == NULL) { |
f1d0c998 RL |
3894 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3895 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3896 | if (rc < 0) { |
afe6f653 | 3897 | cifs_server_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3898 | server->ssocket = NULL; |
1da177e4 | 3899 | return rc; |
1da177e4 | 3900 | } |
bcf4b106 JL |
3901 | |
3902 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3903 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3904 | server->ssocket = socket; |
3905 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3906 | if (sfamily == AF_INET6) |
3907 | cifs_reclassify_socket6(socket); | |
3908 | else | |
3909 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3910 | } |
3911 | ||
3eb9a889 BG |
3912 | rc = bind_socket(server); |
3913 | if (rc < 0) | |
3914 | return rc; | |
3915 | ||
bcf4b106 JL |
3916 | /* |
3917 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3918 | * the default. sock_setsockopt not used because it expects |
3919 | * user space buffer | |
bcf4b106 JL |
3920 | */ |
3921 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3922 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3923 | |
b387eaeb | 3924 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3925 | if (server->noautotune) { |
3926 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3927 | socket->sk->sk_sndbuf = 200 * 1024; | |
3928 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3929 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3930 | } |
1da177e4 | 3931 | |
6a5fa236 | 3932 | if (server->tcp_nodelay) { |
a9f1b85e | 3933 | int val = 1; |
6a5fa236 SF |
3934 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3935 | (char *)&val, sizeof(val)); | |
3936 | if (rc) | |
f96637be JP |
3937 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3938 | rc); | |
6a5fa236 SF |
3939 | } |
3940 | ||
f96637be | 3941 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3942 | socket->sk->sk_sndbuf, |
b6b38f70 | 3943 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3944 | |
8eecd1c2 PAS |
3945 | rc = socket->ops->connect(socket, saddr, slen, |
3946 | server->noblockcnt ? O_NONBLOCK : 0); | |
d532cc7e PAS |
3947 | /* |
3948 | * When mounting SMB root file systems, we do not want to block in | |
3949 | * connect. Otherwise bail out and then let cifs_reconnect() perform | |
3950 | * reconnect failover - if possible. | |
3951 | */ | |
3952 | if (server->noblockcnt && rc == -EINPROGRESS) | |
8eecd1c2 | 3953 | rc = 0; |
ee1b3ea9 | 3954 | if (rc < 0) { |
f96637be | 3955 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3956 | sock_release(socket); |
3957 | server->ssocket = NULL; | |
3958 | return rc; | |
3959 | } | |
3960 | ||
a9f1b85e PS |
3961 | if (sport == htons(RFC1001_PORT)) |
3962 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3963 | |
1da177e4 LT |
3964 | return rc; |
3965 | } | |
3966 | ||
3967 | static int | |
a9f1b85e | 3968 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3969 | { |
6da97910 | 3970 | __be16 *sport; |
a9f1b85e PS |
3971 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3972 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3973 | |
a9f1b85e PS |
3974 | if (server->dstaddr.ss_family == AF_INET6) |
3975 | sport = &addr6->sin6_port; | |
3976 | else | |
3977 | sport = &addr->sin_port; | |
1da177e4 | 3978 | |
a9f1b85e PS |
3979 | if (*sport == 0) { |
3980 | int rc; | |
1da177e4 | 3981 | |
a9f1b85e PS |
3982 | /* try with 445 port at first */ |
3983 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3984 | |
a9f1b85e | 3985 | rc = generic_ip_connect(server); |
1da177e4 | 3986 | if (rc >= 0) |
a9f1b85e | 3987 | return rc; |
6a5fa236 | 3988 | |
a9f1b85e PS |
3989 | /* if it failed, try with 139 port */ |
3990 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3991 | } |
3992 | ||
a9f1b85e | 3993 | return generic_ip_connect(server); |
1da177e4 LT |
3994 | } |
3995 | ||
6d5786a3 | 3996 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3997 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3998 | { |
3999 | /* if we are reconnecting then should we check to see if | |
4000 | * any requested capabilities changed locally e.g. via | |
4001 | * remount but we can not do much about it here | |
4002 | * if they have (even if we could detect it by the following) | |
4003 | * Perhaps we could add a backpointer to array of sb from tcon | |
4004 | * or if we change to make all sb to same share the same | |
4005 | * sb as NFS - then we only have one backpointer to sb. | |
4006 | * What if we wanted to mount the server share twice once with | |
4007 | * and once without posixacls or posix paths? */ | |
4008 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 4009 | |
c18c842b SF |
4010 | if (vol_info && vol_info->no_linux_ext) { |
4011 | tcon->fsUnixInfo.Capability = 0; | |
4012 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 4013 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
4014 | return; |
4015 | } else if (vol_info) | |
4016 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
4017 | ||
4018 | if (tcon->unix_ext == 0) { | |
f96637be | 4019 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
4020 | return; |
4021 | } | |
50c2f753 | 4022 | |
fb8c4b14 | 4023 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 4024 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 4025 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
4026 | /* check for reconnect case in which we do not |
4027 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 4028 | if (vol_info == NULL) { |
50c2f753 | 4029 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
4030 | originally at mount time */ |
4031 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
4032 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
4033 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
4034 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 4035 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 4036 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 4037 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
4038 | cifs_dbg(VFS, "possible reconnect error\n"); |
4039 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 4040 | } |
8af18971 | 4041 | } |
50c2f753 | 4042 | |
6848b733 | 4043 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 4044 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 4045 | |
8af18971 | 4046 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 4047 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 4048 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 4049 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 4050 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
4051 | if (cifs_sb) |
4052 | cifs_sb->mnt_cifs_flags |= | |
4053 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
4054 | } |
4055 | ||
75865f8c | 4056 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 4057 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 4058 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 4059 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
4060 | if (cifs_sb) |
4061 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
4062 | CIFS_MOUNT_POSIX_PATHS; |
4063 | } | |
50c2f753 | 4064 | |
f96637be | 4065 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 4066 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 4067 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 4068 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 4069 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 4070 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 4071 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 4072 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 4073 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 4074 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 4075 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 4076 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 4077 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 4078 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 4079 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 4080 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 4081 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 4082 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 4083 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 4084 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
4085 | #endif /* CIFS_DEBUG2 */ |
4086 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 4087 | if (vol_info == NULL) { |
f96637be | 4088 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 4089 | } else |
f96637be | 4090 | cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n"); |
5a44b319 | 4091 | |
8af18971 SF |
4092 | } |
4093 | } | |
4094 | } | |
4095 | ||
4214ebf4 | 4096 | int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
724d9f1c | 4097 | struct cifs_sb_info *cifs_sb) |
b1c8d2b4 | 4098 | { |
2de970ff JL |
4099 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
4100 | ||
2ced6f69 AV |
4101 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
4102 | cifs_sb->tlink_tree = RB_ROOT; | |
4103 | ||
e8506d25 | 4104 | cifs_sb->bsize = pvolume_info->bsize; |
25c7f41e | 4105 | /* |
5eba8ab3 JL |
4106 | * Temporarily set r/wsize for matching superblock. If we end up using |
4107 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 4108 | */ |
5eba8ab3 | 4109 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
4110 | cifs_sb->wsize = pvolume_info->wsize; |
4111 | ||
3b795210 SF |
4112 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
4113 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
4114 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
4115 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f52aa79d | 4116 | cifs_dbg(FYI, "file mode: %04ho dir mode: %04ho\n", |
f96637be | 4117 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 4118 | |
6d20e840 | 4119 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 4120 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 4121 | |
8393072b AA |
4122 | if (pvolume_info->nodfs) |
4123 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS; | |
3b795210 SF |
4124 | if (pvolume_info->noperm) |
4125 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
4126 | if (pvolume_info->setuids) | |
4127 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
95932655 SF |
4128 | if (pvolume_info->setuidfromacl) |
4129 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; | |
3b795210 SF |
4130 | if (pvolume_info->server_ino) |
4131 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
4132 | if (pvolume_info->remap) | |
2baa2682 SF |
4133 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
4134 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
4135 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
4136 | if (pvolume_info->no_xattr) | |
4137 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
4138 | if (pvolume_info->sfu_emul) | |
4139 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
4140 | if (pvolume_info->nobrl) | |
4141 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
3d4ef9a1 SF |
4142 | if (pvolume_info->nohandlecache) |
4143 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE; | |
be652445 | 4144 | if (pvolume_info->nostrictsync) |
4717bed6 | 4145 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
4146 | if (pvolume_info->mand_lock) |
4147 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
4148 | if (pvolume_info->rwpidforward) |
4149 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
412094a8 SF |
4150 | if (pvolume_info->mode_ace) |
4151 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID; | |
3b795210 SF |
4152 | if (pvolume_info->cifs_acl) |
4153 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 4154 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 4155 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
4156 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
4157 | } | |
4158 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 4159 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
4160 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
4161 | } | |
3b795210 SF |
4162 | if (pvolume_info->override_uid) |
4163 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
4164 | if (pvolume_info->override_gid) | |
4165 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
4166 | if (pvolume_info->dynperm) | |
4167 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
4168 | if (pvolume_info->fsc) |
4169 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
4170 | if (pvolume_info->multiuser) |
4171 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
4172 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
4173 | if (pvolume_info->strict_io) |
4174 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 4175 | if (pvolume_info->direct_io) { |
f96637be | 4176 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
4177 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
4178 | } | |
83bbfa70 SF |
4179 | if (pvolume_info->cache_ro) { |
4180 | cifs_dbg(VFS, "mounting share with read only caching. Ensure that the share will not be modified while in use.\n"); | |
4181 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RO_CACHE; | |
41e033fe SF |
4182 | } else if (pvolume_info->cache_rw) { |
4183 | cifs_dbg(VFS, "mounting share in single client RW caching mode. Ensure that no other systems will be accessing the share.\n"); | |
4184 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_RO_CACHE | | |
4185 | CIFS_MOUNT_RW_CACHE); | |
83bbfa70 | 4186 | } |
736a3320 SM |
4187 | if (pvolume_info->mfsymlinks) { |
4188 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
4189 | /* |
4190 | * Our SFU ("Services for Unix" emulation does not allow | |
4191 | * creating symlinks but does allow reading existing SFU | |
4192 | * symlinks (it does allow both creating and reading SFU | |
4193 | * style mknod and FIFOs though). When "mfsymlinks" and | |
4194 | * "sfu" are both enabled at the same time, it allows | |
4195 | * reading both types of symlinks, but will only create | |
4196 | * them with mfsymlinks format. This allows better | |
4197 | * Apple compatibility (probably better for Samba too) | |
4198 | * while still recognizing old Windows style symlinks. | |
4199 | */ | |
4200 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 4201 | } |
db8b631d | 4202 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 4203 | } |
3b795210 SF |
4204 | |
4205 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 4206 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
4214ebf4 SP |
4207 | |
4208 | if (pvolume_info->prepath) { | |
4209 | cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL); | |
4210 | if (cifs_sb->prepath == NULL) | |
4211 | return -ENOMEM; | |
4212 | } | |
4213 | ||
4214 | return 0; | |
b1c8d2b4 JL |
4215 | } |
4216 | ||
56c762eb PA |
4217 | void |
4218 | cifs_cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 4219 | { |
b946845a | 4220 | kfree(volume_info->username); |
1bfe73c2 | 4221 | kzfree(volume_info->password); |
95c75454 | 4222 | kfree(volume_info->UNC); |
b946845a SF |
4223 | kfree(volume_info->domainname); |
4224 | kfree(volume_info->iocharset); | |
1bfe73c2 | 4225 | kfree(volume_info->prepath); |
b9bce2e9 JL |
4226 | } |
4227 | ||
4228 | void | |
4229 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
4230 | { | |
4231 | if (!volume_info) | |
4232 | return; | |
56c762eb | 4233 | cifs_cleanup_volume_info_contents(volume_info); |
1bfe73c2 | 4234 | kfree(volume_info); |
1bfe73c2 IM |
4235 | } |
4236 | ||
56c762eb PA |
4237 | /* Release all succeed connections */ |
4238 | static inline void mount_put_conns(struct cifs_sb_info *cifs_sb, | |
4239 | unsigned int xid, | |
4240 | struct TCP_Server_Info *server, | |
4241 | struct cifs_ses *ses, struct cifs_tcon *tcon) | |
4242 | { | |
4243 | int rc = 0; | |
4244 | ||
4245 | if (tcon) | |
4246 | cifs_put_tcon(tcon); | |
4247 | else if (ses) | |
4248 | cifs_put_smb_ses(ses); | |
4249 | else if (server) | |
4250 | cifs_put_tcp_session(server, 0); | |
4251 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; | |
4252 | free_xid(xid); | |
4253 | } | |
4254 | ||
4255 | /* Get connections for tcp, ses and tcon */ | |
4256 | static int mount_get_conns(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, | |
4257 | unsigned int *xid, | |
4258 | struct TCP_Server_Info **nserver, | |
4259 | struct cifs_ses **nses, struct cifs_tcon **ntcon) | |
4260 | { | |
4261 | int rc = 0; | |
4262 | struct TCP_Server_Info *server; | |
4263 | struct cifs_ses *ses; | |
4264 | struct cifs_tcon *tcon; | |
4265 | ||
4266 | *nserver = NULL; | |
4267 | *nses = NULL; | |
4268 | *ntcon = NULL; | |
4269 | ||
4270 | *xid = get_xid(); | |
4271 | ||
4272 | /* get a reference to a tcp session */ | |
4273 | server = cifs_get_tcp_session(vol); | |
4274 | if (IS_ERR(server)) { | |
4275 | rc = PTR_ERR(server); | |
4276 | return rc; | |
4277 | } | |
4278 | ||
4279 | *nserver = server; | |
4280 | ||
4281 | if ((vol->max_credits < 20) || (vol->max_credits > 60000)) | |
4282 | server->max_credits = SMB2_MAX_CREDITS_AVAILABLE; | |
4283 | else | |
4284 | server->max_credits = vol->max_credits; | |
4285 | ||
4286 | /* get a reference to a SMB session */ | |
4287 | ses = cifs_get_smb_ses(server, vol); | |
4288 | if (IS_ERR(ses)) { | |
4289 | rc = PTR_ERR(ses); | |
4290 | return rc; | |
4291 | } | |
4292 | ||
4293 | *nses = ses; | |
4294 | ||
4295 | if ((vol->persistent == true) && (!(ses->server->capabilities & | |
4296 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES))) { | |
afe6f653 | 4297 | cifs_server_dbg(VFS, "persistent handles not supported by server\n"); |
56c762eb PA |
4298 | return -EOPNOTSUPP; |
4299 | } | |
4300 | ||
4301 | /* search for existing tcon to this server share */ | |
4302 | tcon = cifs_get_tcon(ses, vol); | |
4303 | if (IS_ERR(tcon)) { | |
4304 | rc = PTR_ERR(tcon); | |
4305 | return rc; | |
4306 | } | |
4307 | ||
4308 | *ntcon = tcon; | |
4309 | ||
4310 | /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */ | |
4311 | if (tcon->posix_extensions) | |
4312 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS; | |
4313 | ||
4314 | /* tell server which Unix caps we support */ | |
4315 | if (cap_unix(tcon->ses)) { | |
4316 | /* | |
4317 | * reset of caps checks mount to see if unix extensions disabled | |
4318 | * for just this mount. | |
4319 | */ | |
4320 | reset_cifs_unix_caps(*xid, tcon, cifs_sb, vol); | |
4321 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && | |
4322 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
4323 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) | |
4324 | return -EACCES; | |
4325 | } else | |
4326 | tcon->unix_ext = 0; /* server does not support them */ | |
4327 | ||
4328 | /* do not care if a following call succeed - informational */ | |
1981ebaa | 4329 | if (!tcon->pipe && server->ops->qfs_tcon) { |
0f060936 | 4330 | server->ops->qfs_tcon(*xid, tcon, cifs_sb); |
1981ebaa SF |
4331 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) { |
4332 | if (tcon->fsDevInfo.DeviceCharacteristics & | |
52870d50 | 4333 | cpu_to_le32(FILE_READ_ONLY_DEVICE)) |
1981ebaa | 4334 | cifs_dbg(VFS, "mounted to read only share\n"); |
41e033fe SF |
4335 | else if ((cifs_sb->mnt_cifs_flags & |
4336 | CIFS_MOUNT_RW_CACHE) == 0) | |
1981ebaa | 4337 | cifs_dbg(VFS, "read only mount of RW share\n"); |
41e033fe | 4338 | /* no need to log a RW mount of a typical RW share */ |
1981ebaa SF |
4339 | } |
4340 | } | |
56c762eb PA |
4341 | |
4342 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, vol); | |
4343 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, vol); | |
4344 | ||
4345 | return 0; | |
4346 | } | |
4347 | ||
4348 | static int mount_setup_tlink(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses, | |
4349 | struct cifs_tcon *tcon) | |
4350 | { | |
4351 | struct tcon_link *tlink; | |
4352 | ||
4353 | /* hang the tcon off of the superblock */ | |
4354 | tlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4355 | if (tlink == NULL) | |
4356 | return -ENOMEM; | |
4357 | ||
4358 | tlink->tl_uid = ses->linux_uid; | |
4359 | tlink->tl_tcon = tcon; | |
4360 | tlink->tl_time = jiffies; | |
4361 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
4362 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4363 | ||
4364 | cifs_sb->master_tlink = tlink; | |
4365 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4366 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); | |
4367 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4368 | ||
4369 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, | |
4370 | TLINK_IDLE_EXPIRE); | |
4371 | return 0; | |
4372 | } | |
b9bce2e9 | 4373 | |
2d6d589d | 4374 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
4375 | /* |
4376 | * cifs_build_path_to_root returns full path to root when we do not have an | |
4377 | * exiting connection (tcon) | |
4378 | */ | |
1bfe73c2 | 4379 | static char * |
b2a0fa15 | 4380 | build_unc_path_to_root(const struct smb_vol *vol, |
4a367dc0 | 4381 | const struct cifs_sb_info *cifs_sb, bool useppath) |
1bfe73c2 | 4382 | { |
b2a0fa15 | 4383 | char *full_path, *pos; |
4a367dc0 PA |
4384 | unsigned int pplen = useppath && vol->prepath ? |
4385 | strlen(vol->prepath) + 1 : 0; | |
b2a0fa15 | 4386 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 4387 | |
340625e6 RS |
4388 | if (unc_len > MAX_TREE_SIZE) |
4389 | return ERR_PTR(-EINVAL); | |
4390 | ||
b2a0fa15 | 4391 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
4392 | if (full_path == NULL) |
4393 | return ERR_PTR(-ENOMEM); | |
4394 | ||
340625e6 | 4395 | memcpy(full_path, vol->UNC, unc_len); |
b2a0fa15 JL |
4396 | pos = full_path + unc_len; |
4397 | ||
4398 | if (pplen) { | |
1fc29bac | 4399 | *pos = CIFS_DIR_SEP(cifs_sb); |
340625e6 | 4400 | memcpy(pos + 1, vol->prepath, pplen); |
b2a0fa15 JL |
4401 | pos += pplen; |
4402 | } | |
4403 | ||
4404 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 4405 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 4406 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
4407 | return full_path; |
4408 | } | |
dd613945 | 4409 | |
1c780228 PA |
4410 | /** |
4411 | * expand_dfs_referral - Perform a dfs referral query and update the cifs_sb | |
4412 | * | |
dd613945 | 4413 | * |
046462ab SF |
4414 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
4415 | * to a string containing updated options for the submount. Otherwise it | |
4416 | * will be left untouched. | |
dd613945 SF |
4417 | * |
4418 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
4419 | * determine whether there were referrals. | |
4420 | */ | |
4421 | static int | |
b669f33c | 4422 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 4423 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 4424 | int check_prefix) |
dd613945 SF |
4425 | { |
4426 | int rc; | |
1c780228 | 4427 | struct dfs_info3_param referral = {0}; |
dd613945 SF |
4428 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; |
4429 | ||
8393072b AA |
4430 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) |
4431 | return -EREMOTE; | |
4432 | ||
4a367dc0 | 4433 | full_path = build_unc_path_to_root(volume_info, cifs_sb, true); |
dd613945 SF |
4434 | if (IS_ERR(full_path)) |
4435 | return PTR_ERR(full_path); | |
4436 | ||
4437 | /* For DFS paths, skip the first '\' of the UNC */ | |
4438 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
4439 | ||
1c780228 PA |
4440 | rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), |
4441 | ref_path, &referral, NULL); | |
4442 | if (!rc) { | |
dd613945 SF |
4443 | char *fake_devname = NULL; |
4444 | ||
4445 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
1c780228 | 4446 | full_path + 1, &referral, |
dd613945 | 4447 | &fake_devname); |
1c780228 | 4448 | free_dfs_info_param(&referral); |
046462ab | 4449 | |
dd613945 SF |
4450 | if (IS_ERR(mdata)) { |
4451 | rc = PTR_ERR(mdata); | |
4452 | mdata = NULL; | |
b9bce2e9 | 4453 | } else { |
56c762eb | 4454 | cifs_cleanup_volume_info_contents(volume_info); |
b9bce2e9 | 4455 | rc = cifs_setup_volume_info(volume_info, mdata, |
1c780228 | 4456 | fake_devname, false); |
dd613945 | 4457 | } |
b9bce2e9 JL |
4458 | kfree(fake_devname); |
4459 | kfree(cifs_sb->mountdata); | |
046462ab | 4460 | cifs_sb->mountdata = mdata; |
dd613945 SF |
4461 | } |
4462 | kfree(full_path); | |
4463 | return rc; | |
4464 | } | |
4a367dc0 PA |
4465 | |
4466 | static inline int get_next_dfs_tgt(const char *path, | |
4467 | struct dfs_cache_tgt_list *tgt_list, | |
4468 | struct dfs_cache_tgt_iterator **tgt_it) | |
4469 | { | |
4470 | if (!*tgt_it) | |
4471 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
4472 | else | |
4473 | *tgt_it = dfs_cache_get_next_tgt(tgt_list, *tgt_it); | |
4474 | return !*tgt_it ? -EHOSTDOWN : 0; | |
4475 | } | |
4476 | ||
4477 | static int update_vol_info(const struct dfs_cache_tgt_iterator *tgt_it, | |
4478 | struct smb_vol *fake_vol, struct smb_vol *vol) | |
4479 | { | |
4480 | const char *tgt = dfs_cache_get_tgt_name(tgt_it); | |
4481 | int len = strlen(tgt) + 2; | |
4482 | char *new_unc; | |
4483 | ||
4484 | new_unc = kmalloc(len, GFP_KERNEL); | |
4485 | if (!new_unc) | |
4486 | return -ENOMEM; | |
74ea5f98 | 4487 | scnprintf(new_unc, len, "\\%s", tgt); |
4a367dc0 PA |
4488 | |
4489 | kfree(vol->UNC); | |
4490 | vol->UNC = new_unc; | |
4491 | ||
4492 | if (fake_vol->prepath) { | |
4493 | kfree(vol->prepath); | |
4494 | vol->prepath = fake_vol->prepath; | |
4495 | fake_vol->prepath = NULL; | |
4496 | } | |
4497 | memcpy(&vol->dstaddr, &fake_vol->dstaddr, sizeof(vol->dstaddr)); | |
4498 | ||
4499 | return 0; | |
4500 | } | |
4501 | ||
4502 | static int setup_dfs_tgt_conn(const char *path, | |
4503 | const struct dfs_cache_tgt_iterator *tgt_it, | |
4504 | struct cifs_sb_info *cifs_sb, | |
4505 | struct smb_vol *vol, | |
4506 | unsigned int *xid, | |
4507 | struct TCP_Server_Info **server, | |
4508 | struct cifs_ses **ses, | |
4509 | struct cifs_tcon **tcon) | |
4510 | { | |
4511 | int rc; | |
4512 | struct dfs_info3_param ref = {0}; | |
4513 | char *mdata = NULL, *fake_devname = NULL; | |
d0959b08 | 4514 | struct smb_vol fake_vol = {NULL}; |
4a367dc0 PA |
4515 | |
4516 | cifs_dbg(FYI, "%s: dfs path: %s\n", __func__, path); | |
4517 | ||
4518 | rc = dfs_cache_get_tgt_referral(path, tgt_it, &ref); | |
4519 | if (rc) | |
4520 | return rc; | |
4521 | ||
4522 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, path, &ref, | |
4523 | &fake_devname); | |
4524 | free_dfs_info_param(&ref); | |
4525 | ||
4526 | if (IS_ERR(mdata)) { | |
4527 | rc = PTR_ERR(mdata); | |
4528 | mdata = NULL; | |
4529 | } else { | |
4530 | cifs_dbg(FYI, "%s: fake_devname: %s\n", __func__, fake_devname); | |
4531 | rc = cifs_setup_volume_info(&fake_vol, mdata, fake_devname, | |
4532 | false); | |
4533 | } | |
4534 | kfree(mdata); | |
4535 | kfree(fake_devname); | |
4536 | ||
4537 | if (!rc) { | |
4538 | /* | |
4539 | * We use a 'fake_vol' here because we need pass it down to the | |
4540 | * mount_{get,put} functions to test connection against new DFS | |
4541 | * targets. | |
4542 | */ | |
4543 | mount_put_conns(cifs_sb, *xid, *server, *ses, *tcon); | |
4544 | rc = mount_get_conns(&fake_vol, cifs_sb, xid, server, ses, | |
4545 | tcon); | |
4546 | if (!rc) { | |
4547 | /* | |
4548 | * We were able to connect to new target server. | |
4549 | * Update current volume info with new target server. | |
4550 | */ | |
4551 | rc = update_vol_info(tgt_it, &fake_vol, vol); | |
4552 | } | |
4553 | } | |
4554 | cifs_cleanup_volume_info_contents(&fake_vol); | |
4555 | return rc; | |
4556 | } | |
4557 | ||
4558 | static int mount_do_dfs_failover(const char *path, | |
4559 | struct cifs_sb_info *cifs_sb, | |
4560 | struct smb_vol *vol, | |
4561 | struct cifs_ses *root_ses, | |
4562 | unsigned int *xid, | |
4563 | struct TCP_Server_Info **server, | |
4564 | struct cifs_ses **ses, | |
4565 | struct cifs_tcon **tcon) | |
4566 | { | |
4567 | int rc; | |
4568 | struct dfs_cache_tgt_list tgt_list; | |
4569 | struct dfs_cache_tgt_iterator *tgt_it = NULL; | |
4570 | ||
4571 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) | |
4572 | return -EOPNOTSUPP; | |
4573 | ||
4574 | rc = dfs_cache_noreq_find(path, NULL, &tgt_list); | |
4575 | if (rc) | |
4576 | return rc; | |
4577 | ||
4578 | for (;;) { | |
4579 | /* Get next DFS target server - if any */ | |
4580 | rc = get_next_dfs_tgt(path, &tgt_list, &tgt_it); | |
4581 | if (rc) | |
4582 | break; | |
4583 | /* Connect to next DFS target */ | |
4584 | rc = setup_dfs_tgt_conn(path, tgt_it, cifs_sb, vol, xid, server, | |
4585 | ses, tcon); | |
4586 | if (!rc || rc == -EACCES || rc == -EOPNOTSUPP) | |
4587 | break; | |
4588 | } | |
4589 | if (!rc) { | |
4590 | /* | |
4591 | * Update DFS target hint in DFS referral cache with the target | |
4592 | * server we successfully reconnected to. | |
4593 | */ | |
4594 | rc = dfs_cache_update_tgthint(*xid, root_ses ? root_ses : *ses, | |
4595 | cifs_sb->local_nls, | |
4596 | cifs_remap(cifs_sb), path, | |
4597 | tgt_it); | |
4598 | } | |
4599 | dfs_cache_free_tgts(&tgt_list); | |
4600 | return rc; | |
4601 | } | |
2d6d589d | 4602 | #endif |
1bfe73c2 | 4603 | |
5072010c | 4604 | int |
04db79b0 | 4605 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
c7c137b9 | 4606 | const char *devname, bool is_smb3) |
1da177e4 | 4607 | { |
724d9f1c | 4608 | int rc = 0; |
1da177e4 | 4609 | |
c7c137b9 | 4610 | if (cifs_parse_mount_options(mount_data, devname, volume_info, is_smb3)) |
04db79b0 | 4611 | return -EINVAL; |
1da177e4 | 4612 | |
7586b765 | 4613 | if (volume_info->nullauth) { |
f96637be | 4614 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
4615 | kfree(volume_info->username); |
4616 | volume_info->username = NULL; | |
7586b765 | 4617 | } else if (volume_info->username) { |
1da177e4 | 4618 | /* BB fixme parse for domain name here */ |
f96637be | 4619 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 4620 | } else { |
f96637be | 4621 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
4622 | /* In userspace mount helper we can get user name from alternate |
4623 | locations such as env variables and files on disk */ | |
04db79b0 | 4624 | return -EINVAL; |
1da177e4 LT |
4625 | } |
4626 | ||
1da177e4 | 4627 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 4628 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
4629 | /* load_nls_default cannot return null */ |
4630 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 4631 | } else { |
a5fc4ce0 JL |
4632 | volume_info->local_nls = load_nls(volume_info->iocharset); |
4633 | if (volume_info->local_nls == NULL) { | |
f96637be | 4634 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 4635 | volume_info->iocharset); |
04db79b0 | 4636 | return -ELIBACC; |
1da177e4 LT |
4637 | } |
4638 | } | |
724d9f1c | 4639 | |
724d9f1c PS |
4640 | return rc; |
4641 | } | |
4642 | ||
04db79b0 | 4643 | struct smb_vol * |
c7c137b9 | 4644 | cifs_get_volume_info(char *mount_data, const char *devname, bool is_smb3) |
04db79b0 JL |
4645 | { |
4646 | int rc; | |
4647 | struct smb_vol *volume_info; | |
4648 | ||
6ee9542a | 4649 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
4650 | if (!volume_info) |
4651 | return ERR_PTR(-ENOMEM); | |
4652 | ||
c7c137b9 | 4653 | rc = cifs_setup_volume_info(volume_info, mount_data, devname, is_smb3); |
04db79b0 JL |
4654 | if (rc) { |
4655 | cifs_cleanup_volume_info(volume_info); | |
4656 | volume_info = ERR_PTR(rc); | |
4657 | } | |
4658 | ||
4659 | return volume_info; | |
4660 | } | |
4661 | ||
a6b5058f AA |
4662 | static int |
4663 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, | |
4664 | unsigned int xid, | |
4665 | struct cifs_tcon *tcon, | |
4666 | struct cifs_sb_info *cifs_sb, | |
ce465bf9 RS |
4667 | char *full_path, |
4668 | int added_treename) | |
a6b5058f AA |
4669 | { |
4670 | int rc; | |
4671 | char *s; | |
4672 | char sep, tmp; | |
ce465bf9 | 4673 | int skip = added_treename ? 1 : 0; |
a6b5058f AA |
4674 | |
4675 | sep = CIFS_DIR_SEP(cifs_sb); | |
4676 | s = full_path; | |
4677 | ||
4678 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); | |
4679 | while (rc == 0) { | |
4680 | /* skip separators */ | |
4681 | while (*s == sep) | |
4682 | s++; | |
4683 | if (!*s) | |
4684 | break; | |
4685 | /* next separator */ | |
4686 | while (*s && *s != sep) | |
4687 | s++; | |
ce465bf9 RS |
4688 | /* |
4689 | * if the treename is added, we then have to skip the first | |
4690 | * part within the separators | |
4691 | */ | |
4692 | if (skip) { | |
4693 | skip = 0; | |
4694 | continue; | |
4695 | } | |
a6b5058f AA |
4696 | /* |
4697 | * temporarily null-terminate the path at the end of | |
4698 | * the current component | |
4699 | */ | |
4700 | tmp = *s; | |
4701 | *s = 0; | |
4702 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, | |
4703 | full_path); | |
4704 | *s = tmp; | |
4705 | } | |
4706 | return rc; | |
4707 | } | |
4708 | ||
56c762eb PA |
4709 | /* |
4710 | * Check if path is remote (e.g. a DFS share). Return -EREMOTE if it is, | |
4711 | * otherwise 0. | |
4712 | */ | |
4713 | static int is_path_remote(struct cifs_sb_info *cifs_sb, struct smb_vol *vol, | |
4714 | const unsigned int xid, | |
4715 | struct TCP_Server_Info *server, | |
4716 | struct cifs_tcon *tcon) | |
724d9f1c | 4717 | { |
1daaae8f | 4718 | int rc; |
56c762eb | 4719 | char *full_path; |
dd854466 | 4720 | |
56c762eb PA |
4721 | if (!server->ops->is_path_accessible) |
4722 | return -EOPNOTSUPP; | |
724d9f1c | 4723 | |
56c762eb PA |
4724 | /* |
4725 | * cifs_build_path_to_root works only when we have a valid tcon | |
4726 | */ | |
4727 | full_path = cifs_build_path_to_root(vol, cifs_sb, tcon, | |
4728 | tcon->Flags & SMB_SHARE_IS_IN_DFS); | |
4729 | if (full_path == NULL) | |
4730 | return -ENOMEM; | |
724d9f1c | 4731 | |
56c762eb | 4732 | cifs_dbg(FYI, "%s: full_path: %s\n", __func__, full_path); |
1da177e4 | 4733 | |
56c762eb PA |
4734 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
4735 | full_path); | |
4736 | if (rc != 0 && rc != -EREMOTE) { | |
4737 | kfree(full_path); | |
4738 | return rc; | |
b618f001 | 4739 | } |
592fafe6 | 4740 | |
56c762eb PA |
4741 | if (rc != -EREMOTE) { |
4742 | rc = cifs_are_all_path_components_accessible(server, xid, tcon, | |
ce465bf9 | 4743 | cifs_sb, full_path, tcon->Flags & SMB_SHARE_IS_IN_DFS); |
56c762eb | 4744 | if (rc != 0) { |
afe6f653 | 4745 | cifs_server_dbg(VFS, "cannot query dirs between root and final path, " |
56c762eb PA |
4746 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); |
4747 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
4748 | rc = 0; | |
4749 | } | |
d00c28de | 4750 | } |
1bfe73c2 | 4751 | |
56c762eb PA |
4752 | kfree(full_path); |
4753 | return rc; | |
4754 | } | |
ce558b0e | 4755 | |
56c762eb | 4756 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5bb30a4d PAS |
4757 | static inline void set_root_tcon(struct cifs_sb_info *cifs_sb, |
4758 | struct cifs_tcon *tcon, | |
4759 | struct cifs_tcon **root) | |
4760 | { | |
4761 | spin_lock(&cifs_tcp_ses_lock); | |
4762 | tcon->tc_count++; | |
4763 | tcon->remap = cifs_remap(cifs_sb); | |
4764 | spin_unlock(&cifs_tcp_ses_lock); | |
4765 | *root = tcon; | |
4766 | } | |
4767 | ||
56c762eb PA |
4768 | int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) |
4769 | { | |
4770 | int rc = 0; | |
4771 | unsigned int xid; | |
4772 | struct cifs_ses *ses; | |
4a367dc0 | 4773 | struct cifs_tcon *root_tcon = NULL; |
56c762eb PA |
4774 | struct cifs_tcon *tcon = NULL; |
4775 | struct TCP_Server_Info *server; | |
4a367dc0 | 4776 | char *root_path = NULL, *full_path = NULL; |
5072010c | 4777 | char *old_mountdata, *origin_mountdata = NULL; |
56c762eb | 4778 | int count; |
c18c842b | 4779 | |
56c762eb PA |
4780 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); |
4781 | if (!rc && tcon) { | |
4a367dc0 PA |
4782 | /* If not a standalone DFS root, then check if path is remote */ |
4783 | rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, | |
4784 | cifs_remap(cifs_sb), vol->UNC + 1, NULL, | |
4785 | NULL); | |
4786 | if (rc) { | |
4787 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4788 | if (!rc) | |
4789 | goto out; | |
4790 | if (rc != -EREMOTE) | |
4791 | goto error; | |
4792 | } | |
56c762eb | 4793 | } |
4a367dc0 PA |
4794 | /* |
4795 | * If first DFS target server went offline and we failed to connect it, | |
4796 | * server and ses pointers are NULL at this point, though we still have | |
4797 | * chance to get a cached DFS referral in expand_dfs_referral() and | |
4798 | * retry next target available in it. | |
4799 | * | |
4800 | * If a NULL ses ptr is passed to dfs_cache_find(), a lookup will be | |
4801 | * performed against DFS path and *no* requests will be sent to server | |
4802 | * for any new DFS referrals. Hence it's safe to skip checking whether | |
4803 | * server or ses ptr is NULL. | |
4804 | */ | |
4805 | if (rc == -EACCES || rc == -EOPNOTSUPP) | |
56c762eb | 4806 | goto error; |
6848b733 | 4807 | |
4a367dc0 PA |
4808 | root_path = build_unc_path_to_root(vol, cifs_sb, false); |
4809 | if (IS_ERR(root_path)) { | |
4810 | rc = PTR_ERR(root_path); | |
4811 | root_path = NULL; | |
4812 | goto error; | |
4813 | } | |
f7910cbd | 4814 | |
93d5cb51 PA |
4815 | full_path = build_unc_path_to_root(vol, cifs_sb, true); |
4816 | if (IS_ERR(full_path)) { | |
4817 | rc = PTR_ERR(full_path); | |
4818 | full_path = NULL; | |
4819 | goto error; | |
4820 | } | |
c1508ca2 SF |
4821 | /* |
4822 | * Perform an unconditional check for whether there are DFS | |
4823 | * referrals for this path without prefix, to provide support | |
4824 | * for DFS referrals from w2k8 servers which don't seem to respond | |
4825 | * with PATH_NOT_COVERED to requests that include the prefix. | |
4826 | * Chase the referral if found, otherwise continue normally. | |
4827 | */ | |
56c762eb PA |
4828 | old_mountdata = cifs_sb->mountdata; |
4829 | (void)expand_dfs_referral(xid, ses, vol, cifs_sb, false); | |
4830 | ||
4831 | if (cifs_sb->mountdata == NULL) { | |
4832 | rc = -ENOENT; | |
4833 | goto error; | |
c1508ca2 | 4834 | } |
c1508ca2 | 4835 | |
5072010c PAS |
4836 | /* Save DFS root volume information for DFS refresh worker */ |
4837 | origin_mountdata = kstrndup(cifs_sb->mountdata, | |
4838 | strlen(cifs_sb->mountdata), GFP_KERNEL); | |
4839 | if (!origin_mountdata) { | |
4840 | rc = -ENOMEM; | |
4841 | goto error; | |
4842 | } | |
4843 | ||
56c762eb PA |
4844 | if (cifs_sb->mountdata != old_mountdata) { |
4845 | /* If we were redirected, reconnect to new target server */ | |
4846 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
4847 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); | |
4848 | } | |
4849 | if (rc) { | |
4850 | if (rc == -EACCES || rc == -EOPNOTSUPP) | |
4851 | goto error; | |
4a367dc0 PA |
4852 | /* Perform DFS failover to any other DFS targets */ |
4853 | rc = mount_do_dfs_failover(root_path + 1, cifs_sb, vol, NULL, | |
4854 | &xid, &server, &ses, &tcon); | |
4855 | if (rc) | |
4856 | goto error; | |
56c762eb PA |
4857 | } |
4858 | ||
4a367dc0 PA |
4859 | kfree(root_path); |
4860 | root_path = build_unc_path_to_root(vol, cifs_sb, false); | |
4861 | if (IS_ERR(root_path)) { | |
4862 | rc = PTR_ERR(root_path); | |
4863 | root_path = NULL; | |
4864 | goto error; | |
4865 | } | |
4866 | /* Cache out resolved root server */ | |
4867 | (void)dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), | |
4868 | root_path + 1, NULL, NULL); | |
5bb30a4d | 4869 | kfree(root_path); |
4a367dc0 | 4870 | root_path = NULL; |
4a367dc0 | 4871 | |
5bb30a4d | 4872 | set_root_tcon(cifs_sb, tcon, &root_tcon); |
4a367dc0 | 4873 | |
56c762eb PA |
4874 | for (count = 1; ;) { |
4875 | if (!rc && tcon) { | |
4876 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4877 | if (!rc || rc != -EREMOTE) | |
4878 | break; | |
68889f26 | 4879 | } |
6d3ea7e4 | 4880 | /* |
56c762eb PA |
4881 | * BB: when we implement proper loop detection, |
4882 | * we will remove this check. But now we need it | |
4883 | * to prevent an indefinite loop if 'DFS tree' is | |
4884 | * misconfigured (i.e. has loops). | |
6d3ea7e4 | 4885 | */ |
56c762eb | 4886 | if (count++ > MAX_NESTED_LINKS) { |
5c2503a8 | 4887 | rc = -ELOOP; |
56c762eb | 4888 | break; |
5c2503a8 | 4889 | } |
1bfe73c2 | 4890 | |
4a367dc0 PA |
4891 | kfree(full_path); |
4892 | full_path = build_unc_path_to_root(vol, cifs_sb, true); | |
4893 | if (IS_ERR(full_path)) { | |
4894 | rc = PTR_ERR(full_path); | |
4895 | full_path = NULL; | |
4896 | break; | |
4897 | } | |
4898 | ||
56c762eb | 4899 | old_mountdata = cifs_sb->mountdata; |
4a367dc0 | 4900 | rc = expand_dfs_referral(xid, root_tcon->ses, vol, cifs_sb, |
56c762eb PA |
4901 | true); |
4902 | if (rc) | |
4903 | break; | |
7b91e266 | 4904 | |
56c762eb PA |
4905 | if (cifs_sb->mountdata != old_mountdata) { |
4906 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
4907 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, | |
4908 | &tcon); | |
5bb30a4d PAS |
4909 | /* |
4910 | * Ensure that DFS referrals go through new root server. | |
4911 | */ | |
4912 | if (!rc && tcon && | |
4913 | (tcon->share_flags & (SHI1005_FLAGS_DFS | | |
4914 | SHI1005_FLAGS_DFS_ROOT))) { | |
4915 | cifs_put_tcon(root_tcon); | |
4916 | set_root_tcon(cifs_sb, tcon, &root_tcon); | |
4917 | } | |
56c762eb PA |
4918 | } |
4919 | if (rc) { | |
4a367dc0 PA |
4920 | if (rc == -EACCES || rc == -EOPNOTSUPP) |
4921 | break; | |
4922 | /* Perform DFS failover to any other DFS targets */ | |
4923 | rc = mount_do_dfs_failover(full_path + 1, cifs_sb, vol, | |
4924 | root_tcon->ses, &xid, | |
4925 | &server, &ses, &tcon); | |
56c762eb PA |
4926 | if (rc == -EACCES || rc == -EOPNOTSUPP || !server || |
4927 | !ses) | |
4928 | goto error; | |
1bfe73c2 IM |
4929 | } |
4930 | } | |
4a367dc0 | 4931 | cifs_put_tcon(root_tcon); |
1bfe73c2 | 4932 | |
9d002df4 | 4933 | if (rc) |
56c762eb | 4934 | goto error; |
9d002df4 | 4935 | |
93d5cb51 PA |
4936 | spin_lock(&cifs_tcp_ses_lock); |
4937 | if (!tcon->dfs_path) { | |
4938 | /* Save full path in new tcon to do failover when reconnecting tcons */ | |
4939 | tcon->dfs_path = full_path; | |
4940 | full_path = NULL; | |
4941 | tcon->remap = cifs_remap(cifs_sb); | |
4942 | } | |
4943 | cifs_sb->origin_fullpath = kstrndup(tcon->dfs_path, | |
2f0a6174 Y |
4944 | strlen(tcon->dfs_path), |
4945 | GFP_ATOMIC); | |
93d5cb51 PA |
4946 | if (!cifs_sb->origin_fullpath) { |
4947 | spin_unlock(&cifs_tcp_ses_lock); | |
4948 | rc = -ENOMEM; | |
4949 | goto error; | |
4950 | } | |
4951 | spin_unlock(&cifs_tcp_ses_lock); | |
4952 | ||
5072010c | 4953 | rc = dfs_cache_add_vol(origin_mountdata, vol, cifs_sb->origin_fullpath); |
e511d317 PA |
4954 | if (rc) { |
4955 | kfree(cifs_sb->origin_fullpath); | |
4956 | goto error; | |
4957 | } | |
5fc7fcd0 AA |
4958 | /* |
4959 | * After reconnecting to a different server, unique ids won't | |
4960 | * match anymore, so we disable serverino. This prevents | |
4961 | * dentry revalidation to think the dentry are stale (ESTALE). | |
4962 | */ | |
4963 | cifs_autodisable_serverino(cifs_sb); | |
bacd704a PAS |
4964 | /* |
4965 | * Force the use of prefix path to support failover on DFS paths that | |
4966 | * resolve to targets that have different prefix paths. | |
4967 | */ | |
4968 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
4969 | kfree(cifs_sb->prepath); | |
4970 | cifs_sb->prepath = vol->prepath; | |
4971 | vol->prepath = NULL; | |
4972 | ||
56c762eb PA |
4973 | out: |
4974 | free_xid(xid); | |
d70e9fa5 | 4975 | cifs_try_adding_channels(ses); |
56c762eb | 4976 | return mount_setup_tlink(cifs_sb, ses, tcon); |
9d002df4 | 4977 | |
56c762eb | 4978 | error: |
4a367dc0 PA |
4979 | kfree(full_path); |
4980 | kfree(root_path); | |
5072010c | 4981 | kfree(origin_mountdata); |
56c762eb PA |
4982 | mount_put_conns(cifs_sb, xid, server, ses, tcon); |
4983 | return rc; | |
4984 | } | |
4985 | #else | |
4986 | int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) | |
4987 | { | |
4988 | int rc = 0; | |
4989 | unsigned int xid; | |
4990 | struct cifs_ses *ses; | |
4991 | struct cifs_tcon *tcon; | |
4992 | struct TCP_Server_Info *server; | |
413e661c | 4993 | |
56c762eb PA |
4994 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); |
4995 | if (rc) | |
4996 | goto error; | |
2de970ff | 4997 | |
56c762eb PA |
4998 | if (tcon) { |
4999 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
5000 | if (rc == -EREMOTE) | |
5001 | rc = -EOPNOTSUPP; | |
5002 | if (rc) | |
5003 | goto error; | |
1bfe73c2 IM |
5004 | } |
5005 | ||
6d5786a3 | 5006 | free_xid(xid); |
56c762eb PA |
5007 | |
5008 | return mount_setup_tlink(cifs_sb, ses, tcon); | |
5009 | ||
5010 | error: | |
5011 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
1da177e4 LT |
5012 | return rc; |
5013 | } | |
56c762eb | 5014 | #endif |
1da177e4 | 5015 | |
8d1bca32 | 5016 | /* |
b327a717 | 5017 | * Issue a TREE_CONNECT request. |
8d1bca32 | 5018 | */ |
1da177e4 | 5019 | int |
2e6e02ab | 5020 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 5021 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
5022 | const struct nls_table *nls_codepage) |
5023 | { | |
5024 | struct smb_hdr *smb_buffer; | |
5025 | struct smb_hdr *smb_buffer_response; | |
5026 | TCONX_REQ *pSMB; | |
5027 | TCONX_RSP *pSMBr; | |
5028 | unsigned char *bcc_ptr; | |
5029 | int rc = 0; | |
690c522f JL |
5030 | int length; |
5031 | __u16 bytes_left, count; | |
1da177e4 LT |
5032 | |
5033 | if (ses == NULL) | |
5034 | return -EIO; | |
5035 | ||
5036 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 5037 | if (smb_buffer == NULL) |
1da177e4 | 5038 | return -ENOMEM; |
ca43e3be | 5039 | |
1da177e4 LT |
5040 | smb_buffer_response = smb_buffer; |
5041 | ||
5042 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
5043 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 5044 | |
88257360 | 5045 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
5046 | smb_buffer->Uid = ses->Suid; |
5047 | pSMB = (TCONX_REQ *) smb_buffer; | |
5048 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
5049 | ||
5050 | pSMB->AndXCommand = 0xFF; | |
5051 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 5052 | bcc_ptr = &pSMB->Password[0]; |
b327a717 | 5053 | if (tcon->pipe || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 5054 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 5055 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 5056 | bcc_ptr++; /* skip password */ |
7c7b25bc | 5057 | /* already aligned so no need to do it below */ |
eeac8047 | 5058 | } else { |
540b2e37 | 5059 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
5060 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
5061 | specified as required (when that support is added to | |
5062 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 5063 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
5064 | by Samba (not sure whether other servers allow |
5065 | NTLMv2 password here) */ | |
7c7b25bc | 5066 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 5067 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 5068 | (ses->sectype == LANMAN)) |
d3ba50b1 | 5069 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 5070 | ses->server->sec_mode & |
4e53a3fb JL |
5071 | SECMODE_PW_ENCRYPT ? true : false, |
5072 | bcc_ptr); | |
7c7b25bc SF |
5073 | else |
5074 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 5075 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 5076 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
5077 | if (rc) { |
5078 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
5079 | __func__, rc); | |
5080 | cifs_buf_release(smb_buffer); | |
5081 | return rc; | |
5082 | } | |
eeac8047 | 5083 | |
540b2e37 | 5084 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 5085 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
5086 | /* must align unicode strings */ |
5087 | *bcc_ptr = 0; /* null byte password */ | |
5088 | bcc_ptr++; | |
5089 | } | |
eeac8047 | 5090 | } |
1da177e4 | 5091 | |
38d77c50 | 5092 | if (ses->server->sign) |
1da177e4 LT |
5093 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
5094 | ||
5095 | if (ses->capabilities & CAP_STATUS32) { | |
5096 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
5097 | } | |
5098 | if (ses->capabilities & CAP_DFS) { | |
5099 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
5100 | } | |
5101 | if (ses->capabilities & CAP_UNICODE) { | |
5102 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
5103 | length = | |
acbbb76a | 5104 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 5105 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
5106 | (/* server len*/ + 256 /* share len */), nls_codepage); |
5107 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
5108 | bcc_ptr += 2; /* skip trailing null */ |
5109 | } else { /* ASCII */ | |
1da177e4 LT |
5110 | strcpy(bcc_ptr, tree); |
5111 | bcc_ptr += strlen(tree) + 1; | |
5112 | } | |
5113 | strcpy(bcc_ptr, "?????"); | |
5114 | bcc_ptr += strlen("?????"); | |
5115 | bcc_ptr += 1; | |
5116 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
5117 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
5118 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
5119 | pSMB->ByteCount = cpu_to_le16(count); |
5120 | ||
133672ef | 5121 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 5122 | 0); |
1da177e4 | 5123 | |
1da177e4 | 5124 | /* above now done in SendReceive */ |
b327a717 | 5125 | if (rc == 0) { |
0e0d2cf3 SF |
5126 | bool is_unicode; |
5127 | ||
1da177e4 | 5128 | tcon->tidStatus = CifsGood; |
3b795210 | 5129 | tcon->need_reconnect = false; |
1da177e4 LT |
5130 | tcon->tid = smb_buffer_response->Tid; |
5131 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 5132 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 5133 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
5134 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
5135 | is_unicode = true; | |
5136 | else | |
5137 | is_unicode = false; | |
5138 | ||
cc20c031 | 5139 | |
50c2f753 | 5140 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
5141 | if (length == 3) { |
5142 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
5143 | (bcc_ptr[2] == 'C')) { | |
f96637be | 5144 | cifs_dbg(FYI, "IPC connection\n"); |
b327a717 AA |
5145 | tcon->ipc = true; |
5146 | tcon->pipe = true; | |
7f8ed420 SF |
5147 | } |
5148 | } else if (length == 2) { | |
5149 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
5150 | /* the most common case */ | |
f96637be | 5151 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
5152 | } |
5153 | } | |
50c2f753 | 5154 | bcc_ptr += length + 1; |
cc20c031 | 5155 | bytes_left -= (length + 1); |
46b51d08 | 5156 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
5157 | |
5158 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 5159 | kfree(tcon->nativeFileSystem); |
acbbb76a | 5160 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 5161 | bytes_left, is_unicode, |
cc20c031 JL |
5162 | nls_codepage); |
5163 | ||
f96637be | 5164 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 5165 | |
fb8c4b14 | 5166 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
5167 | (smb_buffer_response->WordCount == 7)) |
5168 | /* field is in same location */ | |
3979877e SF |
5169 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
5170 | else | |
5171 | tcon->Flags = 0; | |
f96637be | 5172 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 LT |
5173 | } |
5174 | ||
a8a11d39 | 5175 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
5176 | return rc; |
5177 | } | |
5178 | ||
2e32cf5e AV |
5179 | static void delayed_free(struct rcu_head *p) |
5180 | { | |
5181 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
5182 | unload_nls(sbi->local_nls); | |
5183 | kfree(sbi); | |
5184 | } | |
5185 | ||
2a9b9951 AV |
5186 | void |
5187 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 5188 | { |
b647c35f JL |
5189 | struct rb_root *root = &cifs_sb->tlink_tree; |
5190 | struct rb_node *node; | |
5191 | struct tcon_link *tlink; | |
9d002df4 | 5192 | |
2de970ff JL |
5193 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
5194 | ||
b647c35f JL |
5195 | spin_lock(&cifs_sb->tlink_tree_lock); |
5196 | while ((node = rb_first(root))) { | |
5197 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
5198 | cifs_get_tlink(tlink); | |
5199 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
5200 | rb_erase(node, root); | |
1da177e4 | 5201 | |
b647c35f JL |
5202 | spin_unlock(&cifs_sb->tlink_tree_lock); |
5203 | cifs_put_tlink(tlink); | |
5204 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5205 | } | |
5206 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 5207 | |
d757d71b | 5208 | kfree(cifs_sb->mountdata); |
a6b5058f | 5209 | kfree(cifs_sb->prepath); |
93d5cb51 | 5210 | #ifdef CONFIG_CIFS_DFS_UPCALL |
e511d317 | 5211 | dfs_cache_del_vol(cifs_sb->origin_fullpath); |
93d5cb51 PA |
5212 | kfree(cifs_sb->origin_fullpath); |
5213 | #endif | |
2e32cf5e | 5214 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 5215 | } |
1da177e4 | 5216 | |
286170aa PS |
5217 | int |
5218 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
5219 | { |
5220 | int rc = 0; | |
f6a6bf7c | 5221 | struct TCP_Server_Info *server = cifs_ses_server(ses); |
1da177e4 | 5222 | |
286170aa PS |
5223 | if (!server->ops->need_neg || !server->ops->negotiate) |
5224 | return -ENOSYS; | |
5225 | ||
198b5682 | 5226 | /* only send once per connect */ |
286170aa | 5227 | if (!server->ops->need_neg(server)) |
198b5682 JL |
5228 | return 0; |
5229 | ||
286170aa | 5230 | rc = server->ops->negotiate(xid, ses); |
198b5682 JL |
5231 | if (rc == 0) { |
5232 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 5233 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
5234 | server->tcpStatus = CifsGood; |
5235 | else | |
5236 | rc = -EHOSTDOWN; | |
5237 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
5238 | } |
5239 | ||
5240 | return rc; | |
5241 | } | |
5242 | ||
58c45c58 PS |
5243 | int |
5244 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
5245 | struct nls_table *nls_info) | |
198b5682 | 5246 | { |
58c45c58 | 5247 | int rc = -ENOSYS; |
f6a6bf7c | 5248 | struct TCP_Server_Info *server = cifs_ses_server(ses); |
26b994fa | 5249 | |
d70e9fa5 AA |
5250 | if (!ses->binding) { |
5251 | ses->capabilities = server->capabilities; | |
5252 | if (linuxExtEnabled == 0) | |
5253 | ses->capabilities &= (~server->vals->cap_unix); | |
5254 | ||
5255 | if (ses->auth_key.response) { | |
5256 | cifs_dbg(FYI, "Free previous auth_key.response = %p\n", | |
5257 | ses->auth_key.response); | |
5258 | kfree(ses->auth_key.response); | |
5259 | ses->auth_key.response = NULL; | |
5260 | ses->auth_key.len = 0; | |
5261 | } | |
5262 | } | |
20418acd | 5263 | |
f96637be | 5264 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 5265 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 5266 | |
58c45c58 PS |
5267 | if (server->ops->sess_setup) |
5268 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
5269 | ||
d4e63bd6 | 5270 | if (rc) |
afe6f653 | 5271 | cifs_server_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 5272 | |
1da177e4 LT |
5273 | return rc; |
5274 | } | |
5275 | ||
8a8798a5 JL |
5276 | static int |
5277 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
5278 | { | |
3f618223 JL |
5279 | vol->sectype = ses->sectype; |
5280 | ||
5281 | /* krb5 is special, since we don't need username or pw */ | |
5282 | if (vol->sectype == Kerberos) | |
8a8798a5 | 5283 | return 0; |
8a8798a5 JL |
5284 | |
5285 | return cifs_set_cifscreds(vol, ses); | |
5286 | } | |
5287 | ||
96daf2b0 | 5288 | static struct cifs_tcon * |
6d4a0832 | 5289 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 5290 | { |
8a8798a5 | 5291 | int rc; |
96daf2b0 SF |
5292 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
5293 | struct cifs_ses *ses; | |
5294 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 5295 | struct smb_vol *vol_info; |
9d002df4 JL |
5296 | |
5297 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
5298 | if (vol_info == NULL) |
5299 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 5300 | |
9d002df4 JL |
5301 | vol_info->local_nls = cifs_sb->local_nls; |
5302 | vol_info->linux_uid = fsuid; | |
5303 | vol_info->cred_uid = fsuid; | |
5304 | vol_info->UNC = master_tcon->treeName; | |
5305 | vol_info->retry = master_tcon->retry; | |
5306 | vol_info->nocase = master_tcon->nocase; | |
3d4ef9a1 | 5307 | vol_info->nohandlecache = master_tcon->nohandlecache; |
9d002df4 JL |
5308 | vol_info->local_lease = master_tcon->local_lease; |
5309 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
5310 | vol_info->sectype = master_tcon->ses->sectype; |
5311 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 5312 | |
8a8798a5 JL |
5313 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
5314 | if (rc) { | |
5315 | tcon = ERR_PTR(rc); | |
5316 | goto out; | |
5317 | } | |
9d002df4 JL |
5318 | |
5319 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 5320 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 5321 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 5322 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
5323 | |
5324 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
5325 | if (IS_ERR(ses)) { | |
96daf2b0 | 5326 | tcon = (struct cifs_tcon *)ses; |
53e0e11e | 5327 | cifs_put_tcp_session(master_tcon->ses->server, 0); |
9d002df4 JL |
5328 | goto out; |
5329 | } | |
5330 | ||
5331 | tcon = cifs_get_tcon(ses, vol_info); | |
5332 | if (IS_ERR(tcon)) { | |
5333 | cifs_put_smb_ses(ses); | |
5334 | goto out; | |
5335 | } | |
5336 | ||
ce558b0e SF |
5337 | /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */ |
5338 | if (tcon->posix_extensions) | |
5339 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS; | |
0fdfef9a | 5340 | |
29e20f9c | 5341 | if (cap_unix(ses)) |
9d002df4 | 5342 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
b326614e | 5343 | |
9d002df4 | 5344 | out: |
8a8798a5 | 5345 | kfree(vol_info->username); |
97f4b727 | 5346 | kzfree(vol_info->password); |
9d002df4 JL |
5347 | kfree(vol_info); |
5348 | ||
5349 | return tcon; | |
5350 | } | |
5351 | ||
96daf2b0 | 5352 | struct cifs_tcon * |
9d002df4 JL |
5353 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
5354 | { | |
5355 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
5356 | } | |
5357 | ||
b647c35f JL |
5358 | /* find and return a tlink with given uid */ |
5359 | static struct tcon_link * | |
6d4a0832 | 5360 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
5361 | { |
5362 | struct rb_node *node = root->rb_node; | |
5363 | struct tcon_link *tlink; | |
5364 | ||
5365 | while (node) { | |
5366 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
5367 | ||
6d4a0832 | 5368 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 5369 | node = node->rb_left; |
6d4a0832 | 5370 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
5371 | node = node->rb_right; |
5372 | else | |
5373 | return tlink; | |
5374 | } | |
5375 | return NULL; | |
5376 | } | |
5377 | ||
5378 | /* insert a tcon_link into the tree */ | |
5379 | static void | |
5380 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
5381 | { | |
5382 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
5383 | struct tcon_link *tlink; | |
5384 | ||
5385 | while (*new) { | |
5386 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
5387 | parent = *new; | |
5388 | ||
6d4a0832 | 5389 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
5390 | new = &((*new)->rb_left); |
5391 | else | |
5392 | new = &((*new)->rb_right); | |
5393 | } | |
5394 | ||
5395 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
5396 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
5397 | } | |
5398 | ||
9d002df4 JL |
5399 | /* |
5400 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
5401 | * current task. | |
5402 | * | |
5403 | * If the superblock doesn't refer to a multiuser mount, then just return | |
5404 | * the master tcon for the mount. | |
5405 | * | |
6ef933a3 | 5406 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
5407 | * exists, then check to see if it's pending construction. If it is then wait |
5408 | * for construction to complete. Once it's no longer pending, check to see if | |
5409 | * it failed and either return an error or retry construction, depending on | |
5410 | * the timeout. | |
5411 | * | |
5412 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
5413 | * try to construct a new one. | |
5414 | */ | |
5415 | struct tcon_link * | |
5416 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
5417 | { | |
5418 | int ret; | |
6d4a0832 | 5419 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
5420 | struct tcon_link *tlink, *newtlink; |
5421 | ||
5422 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
5423 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
5424 | ||
5425 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 5426 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
5427 | if (tlink) |
5428 | cifs_get_tlink(tlink); | |
5429 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
5430 | ||
5431 | if (tlink == NULL) { | |
5432 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
5433 | if (newtlink == NULL) | |
5434 | return ERR_PTR(-ENOMEM); | |
b647c35f | 5435 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
5436 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
5437 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
5438 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
5439 | cifs_get_tlink(newtlink); | |
5440 | ||
9d002df4 JL |
5441 | spin_lock(&cifs_sb->tlink_tree_lock); |
5442 | /* was one inserted after previous search? */ | |
b647c35f | 5443 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
5444 | if (tlink) { |
5445 | cifs_get_tlink(tlink); | |
5446 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
5447 | kfree(newtlink); |
5448 | goto wait_for_construction; | |
5449 | } | |
9d002df4 | 5450 | tlink = newtlink; |
b647c35f JL |
5451 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
5452 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
5453 | } else { |
5454 | wait_for_construction: | |
5455 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
5456 | TASK_INTERRUPTIBLE); |
5457 | if (ret) { | |
5458 | cifs_put_tlink(tlink); | |
74316201 | 5459 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
5460 | } |
5461 | ||
5462 | /* if it's good, return it */ | |
5463 | if (!IS_ERR(tlink->tl_tcon)) | |
5464 | return tlink; | |
5465 | ||
5466 | /* return error if we tried this already recently */ | |
5467 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
5468 | cifs_put_tlink(tlink); | |
5469 | return ERR_PTR(-EACCES); | |
5470 | } | |
5471 | ||
5472 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
5473 | goto wait_for_construction; | |
5474 | } | |
5475 | ||
5476 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
5477 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
5478 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
5479 | ||
5480 | if (IS_ERR(tlink->tl_tcon)) { | |
5481 | cifs_put_tlink(tlink); | |
5482 | return ERR_PTR(-EACCES); | |
5483 | } | |
5484 | ||
5485 | return tlink; | |
5486 | } | |
2de970ff JL |
5487 | |
5488 | /* | |
5489 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
5490 | * out tcons. | |
5491 | */ | |
5492 | static void | |
5493 | cifs_prune_tlinks(struct work_struct *work) | |
5494 | { | |
5495 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
5496 | prune_tlinks.work); | |
b647c35f | 5497 | struct rb_root *root = &cifs_sb->tlink_tree; |
37e12f55 | 5498 | struct rb_node *node; |
b647c35f JL |
5499 | struct rb_node *tmp; |
5500 | struct tcon_link *tlink; | |
2de970ff | 5501 | |
b647c35f JL |
5502 | /* |
5503 | * Because we drop the spinlock in the loop in order to put the tlink | |
5504 | * it's not guarded against removal of links from the tree. The only | |
5505 | * places that remove entries from the tree are this function and | |
5506 | * umounts. Because this function is non-reentrant and is canceled | |
5507 | * before umount can proceed, this is safe. | |
5508 | */ | |
5509 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5510 | node = rb_first(root); | |
5511 | while (node != NULL) { | |
5512 | tmp = node; | |
5513 | node = rb_next(tmp); | |
5514 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
5515 | ||
5516 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
5517 | atomic_read(&tlink->tl_count) != 0 || | |
5518 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
5519 | continue; | |
2de970ff | 5520 | |
b647c35f JL |
5521 | cifs_get_tlink(tlink); |
5522 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
5523 | rb_erase(tmp, root); | |
5524 | ||
5525 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
5526 | cifs_put_tlink(tlink); | |
5527 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5528 | } | |
5529 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 5530 | |
da472fc8 | 5531 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
5532 | TLINK_IDLE_EXPIRE); |
5533 | } |