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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
0e2bedaa | 40 | #include <net/ipv6.h> |
1da177e4 LT |
41 | #include "cifspdu.h" |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_unicode.h" | |
45 | #include "cifs_debug.h" | |
46 | #include "cifs_fs_sb.h" | |
47 | #include "ntlmssp.h" | |
48 | #include "nterr.h" | |
49 | #include "rfc1002pdu.h" | |
488f1d2d | 50 | #include "fscache.h" |
1da177e4 LT |
51 | |
52 | #define CIFS_PORT 445 | |
53 | #define RFC1001_PORT 139 | |
54 | ||
c74093b6 JL |
55 | /* SMB echo "timeout" -- FIXME: tunable? */ |
56 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
57 | ||
1da177e4 LT |
58 | extern mempool_t *cifs_req_poolp; |
59 | ||
60 | struct smb_vol { | |
61 | char *username; | |
62 | char *password; | |
63 | char *domainname; | |
64 | char *UNC; | |
65 | char *UNCip; | |
1da177e4 | 66 | char *iocharset; /* local code page for mapping to and from Unicode */ |
1397f2ee JL |
67 | char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */ |
68 | char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */ | |
3e4b3e1f | 69 | uid_t cred_uid; |
1da177e4 LT |
70 | uid_t linux_uid; |
71 | gid_t linux_gid; | |
72 | mode_t file_mode; | |
73 | mode_t dir_mode; | |
189acaae | 74 | unsigned secFlg; |
4b18f2a9 SF |
75 | bool retry:1; |
76 | bool intr:1; | |
77 | bool setuids:1; | |
78 | bool override_uid:1; | |
79 | bool override_gid:1; | |
d0a9c078 | 80 | bool dynperm:1; |
4b18f2a9 SF |
81 | bool noperm:1; |
82 | bool no_psx_acl:1; /* set if posix acl support should be disabled */ | |
83 | bool cifs_acl:1; | |
84 | bool no_xattr:1; /* set if xattr (EA) support should be disabled*/ | |
85 | bool server_ino:1; /* use inode numbers from server ie UniqueId */ | |
86 | bool direct_io:1; | |
d39454ff | 87 | bool strict_io:1; /* strict cache behavior */ |
95b1cb90 SF |
88 | bool remap:1; /* set to remap seven reserved chars in filenames */ |
89 | bool posix_paths:1; /* unset to not ask for posix pathnames. */ | |
4b18f2a9 SF |
90 | bool no_linux_ext:1; |
91 | bool sfu_emul:1; | |
95b1cb90 SF |
92 | bool nullauth:1; /* attempt to authenticate with null user */ |
93 | bool nocase:1; /* request case insensitive filenames */ | |
94 | bool nobrl:1; /* disable sending byte range locks to srv */ | |
13a6e42a | 95 | bool mand_lock:1; /* send mandatory not posix byte range lock reqs */ |
95b1cb90 | 96 | bool seal:1; /* request transport encryption on share */ |
84210e91 SF |
97 | bool nodfs:1; /* Do not request DFS, even if available */ |
98 | bool local_lease:1; /* check leases only on local system, not remote */ | |
edf1ae40 SF |
99 | bool noblocksnd:1; |
100 | bool noautotune:1; | |
be652445 | 101 | bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ |
fa1df75d | 102 | bool fsc:1; /* enable fscache */ |
736a3320 | 103 | bool mfsymlinks:1; /* use Minshall+French Symlinks */ |
0eb8a132 | 104 | bool multiuser:1; |
1da177e4 LT |
105 | unsigned int rsize; |
106 | unsigned int wsize; | |
6a5fa236 | 107 | bool sockopt_tcp_nodelay:1; |
1da177e4 | 108 | unsigned short int port; |
6d20e840 | 109 | unsigned long actimeo; /* attribute cache timeout (jiffies) */ |
fb8c4b14 | 110 | char *prepath; |
3eb9a889 | 111 | struct sockaddr_storage srcaddr; /* allow binding to a local IP */ |
a5fc4ce0 | 112 | struct nls_table *local_nls; |
1da177e4 LT |
113 | }; |
114 | ||
2de970ff | 115 | /* FIXME: should these be tunable? */ |
9d002df4 | 116 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 117 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 118 | |
a9f1b85e PS |
119 | static int ip_connect(struct TCP_Server_Info *server); |
120 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 121 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 122 | static void cifs_prune_tlinks(struct work_struct *work); |
1da177e4 | 123 | |
d5c5605c JL |
124 | /* |
125 | * cifs tcp session reconnection | |
126 | * | |
127 | * mark tcp session as reconnecting so temporarily locked | |
128 | * mark all smb sessions as reconnecting for tcp session | |
129 | * reconnect tcp session | |
130 | * wake up waiters on reconnection? - (not needed currently) | |
131 | */ | |
2cd646a2 | 132 | static int |
1da177e4 LT |
133 | cifs_reconnect(struct TCP_Server_Info *server) |
134 | { | |
135 | int rc = 0; | |
f1987b44 | 136 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
137 | struct cifsSesInfo *ses; |
138 | struct cifsTconInfo *tcon; | |
fb8c4b14 | 139 | struct mid_q_entry *mid_entry; |
50c2f753 | 140 | |
1da177e4 | 141 | spin_lock(&GlobalMid_Lock); |
469ee614 | 142 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 143 | /* the demux thread will exit normally |
1da177e4 LT |
144 | next time through the loop */ |
145 | spin_unlock(&GlobalMid_Lock); | |
146 | return rc; | |
147 | } else | |
148 | server->tcpStatus = CifsNeedReconnect; | |
149 | spin_unlock(&GlobalMid_Lock); | |
150 | server->maxBuf = 0; | |
151 | ||
b6b38f70 | 152 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
153 | |
154 | /* before reconnecting the tcp session, mark the smb session (uid) | |
155 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 156 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 157 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d JL |
158 | list_for_each(tmp, &server->smb_ses_list) { |
159 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
160 | ses->need_reconnect = true; | |
161 | ses->ipc_tid = 0; | |
f1987b44 JL |
162 | list_for_each(tmp2, &ses->tcon_list) { |
163 | tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list); | |
3b795210 | 164 | tcon->need_reconnect = true; |
1da177e4 | 165 | } |
1da177e4 | 166 | } |
3f9bcca7 | 167 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 168 | |
1da177e4 | 169 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 170 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 171 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 172 | if (server->ssocket) { |
b6b38f70 JP |
173 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
174 | server->ssocket->flags); | |
91cf45f0 | 175 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 176 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 177 | server->ssocket->state, |
b6b38f70 | 178 | server->ssocket->flags); |
1da177e4 LT |
179 | sock_release(server->ssocket); |
180 | server->ssocket = NULL; | |
181 | } | |
5d0d2882 SP |
182 | server->sequence_number = 0; |
183 | server->session_estab = false; | |
21e73393 SP |
184 | kfree(server->session_key.response); |
185 | server->session_key.response = NULL; | |
186 | server->session_key.len = 0; | |
fda35943 | 187 | server->lstrp = jiffies; |
2b84a36c | 188 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 189 | |
2b84a36c JL |
190 | /* mark submitted MIDs for retry and issue callback */ |
191 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
1da177e4 | 192 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
193 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
194 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
195 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) | |
ad8b15f0 | 196 | mid_entry->midState = MID_RETRY_NEEDED; |
2b84a36c JL |
197 | list_del_init(&mid_entry->qhead); |
198 | mid_entry->callback(mid_entry); | |
1da177e4 LT |
199 | } |
200 | spin_unlock(&GlobalMid_Lock); | |
1da177e4 | 201 | |
469ee614 JL |
202 | while ((server->tcpStatus != CifsExiting) && |
203 | (server->tcpStatus != CifsGood)) { | |
6c3d8909 | 204 | try_to_freeze(); |
a9f1b85e PS |
205 | |
206 | /* we should try only the port we connected to before */ | |
207 | rc = generic_ip_connect(server); | |
fb8c4b14 | 208 | if (rc) { |
b6b38f70 | 209 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 210 | msleep(3000); |
1da177e4 LT |
211 | } else { |
212 | atomic_inc(&tcpSesReconnectCount); | |
213 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 214 | if (server->tcpStatus != CifsExiting) |
1da177e4 | 215 | server->tcpStatus = CifsGood; |
fb8c4b14 | 216 | spin_unlock(&GlobalMid_Lock); |
1da177e4 LT |
217 | } |
218 | } | |
2b84a36c | 219 | |
1da177e4 LT |
220 | return rc; |
221 | } | |
222 | ||
fb8c4b14 | 223 | /* |
e4eb295d SF |
224 | return codes: |
225 | 0 not a transact2, or all data present | |
226 | >0 transact2 with that much data missing | |
227 | -EINVAL = invalid transact2 | |
228 | ||
229 | */ | |
fb8c4b14 | 230 | static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) |
e4eb295d | 231 | { |
fb8c4b14 | 232 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 233 | int remaining; |
26ec2548 | 234 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 235 | |
fb8c4b14 | 236 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
237 | return 0; |
238 | ||
fb8c4b14 SF |
239 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
240 | /* check for parm and data offset going beyond end of smb */ | |
241 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 242 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
243 | return -EINVAL; |
244 | } | |
245 | ||
246 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
247 | ||
26ec2548 JL |
248 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
249 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d SF |
250 | |
251 | remaining = total_data_size - data_in_this_rsp; | |
252 | ||
fb8c4b14 | 253 | if (remaining == 0) |
e4eb295d | 254 | return 0; |
fb8c4b14 | 255 | else if (remaining < 0) { |
b6b38f70 JP |
256 | cFYI(1, "total data %d smaller than data in frame %d", |
257 | total_data_size, data_in_this_rsp); | |
e4eb295d SF |
258 | return -EINVAL; |
259 | } else { | |
b6b38f70 JP |
260 | cFYI(1, "missing %d bytes from transact2, check next response", |
261 | remaining); | |
fb8c4b14 | 262 | if (total_data_size > maxBufSize) { |
b6b38f70 JP |
263 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
264 | total_data_size, maxBufSize); | |
fb8c4b14 | 265 | return -EINVAL; |
e4eb295d SF |
266 | } |
267 | return remaining; | |
268 | } | |
269 | } | |
270 | ||
fb8c4b14 | 271 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
272 | { |
273 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
274 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
fb8c4b14 SF |
275 | char *data_area_of_target; |
276 | char *data_area_of_buf2; | |
26ec2548 JL |
277 | int remaining; |
278 | __u16 byte_count, total_data_size, total_in_buf, total_in_buf2; | |
e4eb295d | 279 | |
26ec2548 | 280 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
e4eb295d | 281 | |
26ec2548 JL |
282 | if (total_data_size != |
283 | get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount)) | |
b6b38f70 | 284 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d | 285 | |
26ec2548 | 286 | total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d SF |
287 | |
288 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 289 | |
fb8c4b14 | 290 | if (remaining < 0) |
e4eb295d SF |
291 | return -EINVAL; |
292 | ||
fb8c4b14 | 293 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 294 | return 0; |
50c2f753 | 295 | |
26ec2548 | 296 | total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 297 | if (remaining < total_in_buf2) { |
b6b38f70 | 298 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
299 | } |
300 | ||
301 | /* find end of first SMB data area */ | |
fb8c4b14 | 302 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 303 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d SF |
304 | /* validate target area */ |
305 | ||
26ec2548 JL |
306 | data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol + |
307 | get_unaligned_le16(&pSMB2->t2_rsp.DataOffset); | |
e4eb295d SF |
308 | |
309 | data_area_of_target += total_in_buf; | |
310 | ||
311 | /* copy second buffer into end of first buffer */ | |
fb8c4b14 | 312 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
e4eb295d | 313 | total_in_buf += total_in_buf2; |
26ec2548 | 314 | put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); |
690c522f | 315 | byte_count = get_bcc_le(pTargetSMB); |
e4eb295d | 316 | byte_count += total_in_buf2; |
690c522f | 317 | put_bcc_le(byte_count, pTargetSMB); |
e4eb295d | 318 | |
70ca734a | 319 | byte_count = pTargetSMB->smb_buf_length; |
e4eb295d SF |
320 | byte_count += total_in_buf2; |
321 | ||
322 | /* BB also add check that we are not beyond maximum buffer size */ | |
50c2f753 | 323 | |
70ca734a | 324 | pTargetSMB->smb_buf_length = byte_count; |
e4eb295d | 325 | |
fb8c4b14 | 326 | if (remaining == total_in_buf2) { |
b6b38f70 | 327 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
328 | return 0; /* we are done */ |
329 | } else /* more responses to go */ | |
330 | return 1; | |
e4eb295d SF |
331 | } |
332 | ||
c74093b6 JL |
333 | static void |
334 | cifs_echo_request(struct work_struct *work) | |
335 | { | |
336 | int rc; | |
337 | struct TCP_Server_Info *server = container_of(work, | |
338 | struct TCP_Server_Info, echo.work); | |
339 | ||
247ec9b4 | 340 | /* |
195291e6 JL |
341 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
342 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
343 | * we got a response recently | |
247ec9b4 | 344 | */ |
195291e6 | 345 | if (server->maxBuf == 0 || |
247ec9b4 | 346 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
347 | goto requeue_echo; |
348 | ||
349 | rc = CIFSSMBEcho(server); | |
350 | if (rc) | |
351 | cFYI(1, "Unable to send echo request to server: %s", | |
352 | server->hostname); | |
353 | ||
354 | requeue_echo: | |
355 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
356 | } | |
357 | ||
1da177e4 LT |
358 | static int |
359 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
360 | { | |
361 | int length; | |
362 | unsigned int pdu_length, total_read; | |
363 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
364 | struct smb_hdr *bigbuf = NULL; |
365 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
366 | struct msghdr smb_msg; |
367 | struct kvec iov; | |
368 | struct socket *csocket = server->ssocket; | |
2b84a36c | 369 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
370 | struct task_struct *task_to_wake = NULL; |
371 | struct mid_q_entry *mid_entry; | |
70ca734a | 372 | char temp; |
4b18f2a9 SF |
373 | bool isLargeBuf = false; |
374 | bool isMultiRsp; | |
e4eb295d | 375 | int reconnect; |
1da177e4 | 376 | |
1da177e4 | 377 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 378 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
379 | |
380 | length = atomic_inc_return(&tcpSesAllocCount); | |
381 | if (length > 1) | |
26f57364 SF |
382 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
383 | GFP_KERNEL); | |
1da177e4 | 384 | |
83144186 | 385 | set_freezable(); |
469ee614 | 386 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
387 | if (try_to_freeze()) |
388 | continue; | |
b8643e1b SF |
389 | if (bigbuf == NULL) { |
390 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 391 | if (!bigbuf) { |
b6b38f70 | 392 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
393 | msleep(3000); |
394 | /* retry will check if exiting */ | |
395 | continue; | |
396 | } | |
0fd1ffe0 PM |
397 | } else if (isLargeBuf) { |
398 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 399 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 400 | } |
b8643e1b SF |
401 | |
402 | if (smallbuf == NULL) { | |
403 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 404 | if (!smallbuf) { |
b6b38f70 | 405 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
406 | msleep(1000); |
407 | /* retry will check if exiting */ | |
408 | continue; | |
409 | } | |
410 | /* beginning of smb buffer is cleared in our buf_get */ | |
411 | } else /* if existing small buf clear beginning */ | |
26f57364 | 412 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 413 | |
4b18f2a9 SF |
414 | isLargeBuf = false; |
415 | isMultiRsp = false; | |
b8643e1b | 416 | smb_buffer = smallbuf; |
1da177e4 LT |
417 | iov.iov_base = smb_buffer; |
418 | iov.iov_len = 4; | |
419 | smb_msg.msg_control = NULL; | |
420 | smb_msg.msg_controllen = 0; | |
f01d5e14 | 421 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 422 | |
f01d5e14 | 423 | incomplete_rcv: |
fda35943 SF |
424 | if (echo_retries > 0 && |
425 | time_after(jiffies, server->lstrp + | |
426 | (echo_retries * SMB_ECHO_INTERVAL))) { | |
427 | cERROR(1, "Server %s has not responded in %d seconds. " | |
428 | "Reconnecting...", server->hostname, | |
429 | (echo_retries * SMB_ECHO_INTERVAL / HZ)); | |
430 | cifs_reconnect(server); | |
431 | csocket = server->ssocket; | |
432 | wake_up(&server->response_q); | |
433 | continue; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | length = |
437 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 438 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 439 | |
469ee614 | 440 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
441 | break; |
442 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 443 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 444 | cifs_reconnect(server); |
b6b38f70 | 445 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
446 | csocket = server->ssocket; |
447 | continue; | |
522bbe65 JL |
448 | } else if (length == -ERESTARTSYS || |
449 | length == -EAGAIN || | |
450 | length == -EINTR) { | |
b8643e1b | 451 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
452 | allowing socket to clear and app threads to set |
453 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
454 | if (pdu_length < 4) { |
455 | iov.iov_base = (4 - pdu_length) + | |
456 | (char *)smb_buffer; | |
457 | iov.iov_len = pdu_length; | |
458 | smb_msg.msg_control = NULL; | |
459 | smb_msg.msg_controllen = 0; | |
c18c732e | 460 | goto incomplete_rcv; |
c527c8a7 | 461 | } else |
c18c732e | 462 | continue; |
1da177e4 | 463 | } else if (length <= 0) { |
b6b38f70 JP |
464 | cFYI(1, "Reconnect after unexpected peek error %d", |
465 | length); | |
1da177e4 LT |
466 | cifs_reconnect(server); |
467 | csocket = server->ssocket; | |
468 | wake_up(&server->response_q); | |
469 | continue; | |
2a974680 | 470 | } else if (length < pdu_length) { |
b6b38f70 JP |
471 | cFYI(1, "requested %d bytes but only got %d bytes", |
472 | pdu_length, length); | |
f01d5e14 | 473 | pdu_length -= length; |
f01d5e14 SF |
474 | msleep(1); |
475 | goto incomplete_rcv; | |
46810cbf | 476 | } |
1da177e4 | 477 | |
70ca734a SF |
478 | /* The right amount was read from socket - 4 bytes */ |
479 | /* so we can now interpret the length field */ | |
46810cbf | 480 | |
70ca734a SF |
481 | /* the first byte big endian of the length field, |
482 | is actually not part of the length but the type | |
483 | with the most common, zero, as regular data */ | |
484 | temp = *((char *) smb_buffer); | |
46810cbf | 485 | |
fb8c4b14 | 486 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
487 | but we convert it here so it is always manipulated |
488 | as host byte order */ | |
5ca33c6a | 489 | pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length); |
70ca734a SF |
490 | smb_buffer->smb_buf_length = pdu_length; |
491 | ||
b6b38f70 | 492 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 493 | |
70ca734a | 494 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 495 | continue; |
70ca734a | 496 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 497 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 498 | continue; |
70ca734a | 499 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 500 | /* we get this from Windows 98 instead of |
46810cbf | 501 | an error on SMB negprot response */ |
b6b38f70 JP |
502 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
503 | pdu_length); | |
7332f2a6 JL |
504 | /* give server a second to clean up */ |
505 | msleep(1000); | |
506 | /* always try 445 first on reconnect since we get NACK | |
507 | * on some if we ever connected to port 139 (the NACK | |
508 | * is since we do not begin with RFC1001 session | |
509 | * initialize frame) | |
510 | */ | |
32670396 | 511 | cifs_set_port((struct sockaddr *) |
a9f1b85e | 512 | &server->dstaddr, CIFS_PORT); |
7332f2a6 JL |
513 | cifs_reconnect(server); |
514 | csocket = server->ssocket; | |
515 | wake_up(&server->response_q); | |
516 | continue; | |
70ca734a | 517 | } else if (temp != (char) 0) { |
b6b38f70 | 518 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
519 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
520 | length); | |
46810cbf SF |
521 | cifs_reconnect(server); |
522 | csocket = server->ssocket; | |
523 | continue; | |
e4eb295d SF |
524 | } |
525 | ||
526 | /* else we have an SMB response */ | |
fb8c4b14 | 527 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 528 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
529 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
530 | length, pdu_length+4); | |
e4eb295d SF |
531 | cifs_reconnect(server); |
532 | csocket = server->ssocket; | |
533 | wake_up(&server->response_q); | |
534 | continue; | |
fb8c4b14 | 535 | } |
e4eb295d SF |
536 | |
537 | /* else length ok */ | |
538 | reconnect = 0; | |
539 | ||
fb8c4b14 | 540 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 541 | isLargeBuf = true; |
e4eb295d SF |
542 | memcpy(bigbuf, smallbuf, 4); |
543 | smb_buffer = bigbuf; | |
544 | } | |
545 | length = 0; | |
546 | iov.iov_base = 4 + (char *)smb_buffer; | |
547 | iov.iov_len = pdu_length; | |
fb8c4b14 | 548 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
549 | total_read += length) { |
550 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
551 | pdu_length - total_read, 0); | |
522bbe65 | 552 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
553 | /* then will exit */ |
554 | reconnect = 2; | |
555 | break; | |
556 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
557 | cifs_reconnect(server); |
558 | csocket = server->ssocket; | |
fb8c4b14 | 559 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
560 | /* Now we will reread sock */ |
561 | reconnect = 1; | |
562 | break; | |
522bbe65 JL |
563 | } else if (length == -ERESTARTSYS || |
564 | length == -EAGAIN || | |
565 | length == -EINTR) { | |
e4eb295d | 566 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 567 | allowing socket to clear and app |
e4eb295d SF |
568 | threads to set tcpStatus |
569 | CifsNeedReconnect if server hung*/ | |
c18c732e | 570 | length = 0; |
46810cbf | 571 | continue; |
e4eb295d | 572 | } else if (length <= 0) { |
b6b38f70 JP |
573 | cERROR(1, "Received no data, expecting %d", |
574 | pdu_length - total_read); | |
e4eb295d SF |
575 | cifs_reconnect(server); |
576 | csocket = server->ssocket; | |
577 | reconnect = 1; | |
578 | break; | |
46810cbf | 579 | } |
e4eb295d | 580 | } |
fb8c4b14 | 581 | if (reconnect == 2) |
e4eb295d | 582 | break; |
fb8c4b14 | 583 | else if (reconnect == 1) |
e4eb295d | 584 | continue; |
1da177e4 | 585 | |
9587fcff | 586 | total_read += 4; /* account for rfc1002 hdr */ |
50c2f753 | 587 | |
9587fcff | 588 | dump_smb(smb_buffer, total_read); |
71823baf JL |
589 | |
590 | /* | |
591 | * We know that we received enough to get to the MID as we | |
592 | * checked the pdu_length earlier. Now check to see | |
593 | * if the rest of the header is OK. We borrow the length | |
594 | * var for the rest of the loop to avoid a new stack var. | |
595 | * | |
596 | * 48 bytes is enough to display the header and a little bit | |
597 | * into the payload for debugging purposes. | |
598 | */ | |
599 | length = checkSMB(smb_buffer, smb_buffer->Mid, total_read); | |
600 | if (length != 0) | |
9587fcff | 601 | cifs_dump_mem("Bad SMB: ", smb_buffer, |
71823baf | 602 | min_t(unsigned int, total_read, 48)); |
1da177e4 | 603 | |
2b84a36c | 604 | mid_entry = NULL; |
fda35943 SF |
605 | server->lstrp = jiffies; |
606 | ||
e4eb295d | 607 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 608 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
e4eb295d SF |
609 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
610 | ||
50c2f753 | 611 | if ((mid_entry->mid == smb_buffer->Mid) && |
e4eb295d SF |
612 | (mid_entry->midState == MID_REQUEST_SUBMITTED) && |
613 | (mid_entry->command == smb_buffer->Command)) { | |
71823baf JL |
614 | if (length == 0 && |
615 | check2ndT2(smb_buffer, server->maxBuf) > 0) { | |
e4eb295d | 616 | /* We have a multipart transact2 resp */ |
4b18f2a9 | 617 | isMultiRsp = true; |
fb8c4b14 | 618 | if (mid_entry->resp_buf) { |
e4eb295d | 619 | /* merge response - fix up 1st*/ |
50c2f753 | 620 | if (coalesce_t2(smb_buffer, |
e4eb295d | 621 | mid_entry->resp_buf)) { |
4b18f2a9 SF |
622 | mid_entry->multiRsp = |
623 | true; | |
e4eb295d SF |
624 | break; |
625 | } else { | |
626 | /* all parts received */ | |
4b18f2a9 SF |
627 | mid_entry->multiEnd = |
628 | true; | |
50c2f753 | 629 | goto multi_t2_fnd; |
e4eb295d SF |
630 | } |
631 | } else { | |
fb8c4b14 | 632 | if (!isLargeBuf) { |
b6b38f70 | 633 | cERROR(1, "1st trans2 resp needs bigbuf"); |
e4eb295d | 634 | /* BB maybe we can fix this up, switch |
50c2f753 | 635 | to already allocated large buffer? */ |
e4eb295d | 636 | } else { |
cd63499c | 637 | /* Have first buffer */ |
e4eb295d SF |
638 | mid_entry->resp_buf = |
639 | smb_buffer; | |
4b18f2a9 SF |
640 | mid_entry->largeBuf = |
641 | true; | |
e4eb295d SF |
642 | bigbuf = NULL; |
643 | } | |
644 | } | |
645 | break; | |
50c2f753 | 646 | } |
e4eb295d | 647 | mid_entry->resp_buf = smb_buffer; |
4b18f2a9 | 648 | mid_entry->largeBuf = isLargeBuf; |
e4eb295d | 649 | multi_t2_fnd: |
71823baf JL |
650 | if (length == 0) |
651 | mid_entry->midState = | |
652 | MID_RESPONSE_RECEIVED; | |
653 | else | |
654 | mid_entry->midState = | |
655 | MID_RESPONSE_MALFORMED; | |
1047abc1 SF |
656 | #ifdef CONFIG_CIFS_STATS2 |
657 | mid_entry->when_received = jiffies; | |
658 | #endif | |
64474bdd SP |
659 | list_del_init(&mid_entry->qhead); |
660 | mid_entry->callback(mid_entry); | |
e4eb295d | 661 | break; |
46810cbf | 662 | } |
2b84a36c | 663 | mid_entry = NULL; |
1da177e4 | 664 | } |
e4eb295d | 665 | spin_unlock(&GlobalMid_Lock); |
2b84a36c JL |
666 | |
667 | if (mid_entry != NULL) { | |
cd63499c | 668 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 669 | if (!isMultiRsp) { |
cd63499c | 670 | /* smb buffer will be freed by user thread */ |
26f57364 | 671 | if (isLargeBuf) |
cd63499c | 672 | bigbuf = NULL; |
26f57364 | 673 | else |
cd63499c SF |
674 | smallbuf = NULL; |
675 | } | |
71823baf JL |
676 | } else if (length != 0) { |
677 | /* response sanity checks failed */ | |
678 | continue; | |
4b18f2a9 SF |
679 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
680 | !isMultiRsp) { | |
b6b38f70 | 681 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 682 | "NumMids %d", atomic_read(&midCount)); |
50c2f753 | 683 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 684 | sizeof(struct smb_hdr)); |
3979877e SF |
685 | #ifdef CONFIG_CIFS_DEBUG2 |
686 | cifs_dump_detail(smb_buffer); | |
687 | cifs_dump_mids(server); | |
688 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 689 | |
e4eb295d SF |
690 | } |
691 | } /* end while !EXITING */ | |
692 | ||
e7ddee90 | 693 | /* take it off the list, if it's not already */ |
3f9bcca7 | 694 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 695 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 696 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 697 | |
1da177e4 LT |
698 | spin_lock(&GlobalMid_Lock); |
699 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 700 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 701 | wake_up_all(&server->response_q); |
e691b9d1 | 702 | |
31ca3bc3 SF |
703 | /* check if we have blocked requests that need to free */ |
704 | /* Note that cifs_max_pending is normally 50, but | |
705 | can be set at module install time to as little as two */ | |
e691b9d1 | 706 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 707 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
708 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
709 | /* We do not want to set the max_pending too low or we | |
710 | could end up with the counter going negative */ | |
1da177e4 | 711 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 712 | /* Although there should not be any requests blocked on |
1da177e4 | 713 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 714 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
715 | to the same server - they now will see the session is in exit state |
716 | and get out of SendReceive. */ | |
717 | wake_up_all(&server->request_q); | |
718 | /* give those requests time to exit */ | |
b8643e1b | 719 | msleep(125); |
50c2f753 | 720 | |
fb8c4b14 | 721 | if (server->ssocket) { |
1da177e4 LT |
722 | sock_release(csocket); |
723 | server->ssocket = NULL; | |
724 | } | |
b8643e1b | 725 | /* buffer usuallly freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
726 | cifs_buf_release(bigbuf); |
727 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 728 | cifs_small_buf_release(smallbuf); |
1da177e4 | 729 | |
9d78315b | 730 | if (!list_empty(&server->pending_mid_q)) { |
1da177e4 | 731 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 732 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
9d78315b | 733 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
2b84a36c JL |
734 | cFYI(1, "Clearing Mid 0x%x - issuing callback", |
735 | mid_entry->mid); | |
736 | list_del_init(&mid_entry->qhead); | |
737 | mid_entry->callback(mid_entry); | |
1da177e4 LT |
738 | } |
739 | spin_unlock(&GlobalMid_Lock); | |
1da177e4 | 740 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 741 | msleep(125); |
1da177e4 LT |
742 | } |
743 | ||
f191401f | 744 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 745 | /* mpx threads have not exited yet give them |
1da177e4 | 746 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
747 | /* due to delays on oplock break requests, we need |
748 | to wait at least 45 seconds before giving up | |
749 | on a request getting a response and going ahead | |
750 | and killing cifsd */ | |
b6b38f70 | 751 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 752 | msleep(46000); |
1da177e4 LT |
753 | /* if threads still have not exited they are probably never |
754 | coming home not much else we can do but free the memory */ | |
755 | } | |
1da177e4 | 756 | |
c359cf3c | 757 | kfree(server->hostname); |
b1c8d2b4 | 758 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 759 | kfree(server); |
93d0ec85 JL |
760 | |
761 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
762 | if (length > 0) |
763 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
764 | GFP_KERNEL); | |
50c2f753 | 765 | |
b1c8d2b4 JL |
766 | /* if server->tsk was NULL then wait for a signal before exiting */ |
767 | if (!task_to_wake) { | |
768 | set_current_state(TASK_INTERRUPTIBLE); | |
769 | while (!signal_pending(current)) { | |
770 | schedule(); | |
771 | set_current_state(TASK_INTERRUPTIBLE); | |
772 | } | |
773 | set_current_state(TASK_RUNNING); | |
774 | } | |
775 | ||
0468a2cf | 776 | module_put_and_exit(0); |
1da177e4 LT |
777 | } |
778 | ||
c359cf3c JL |
779 | /* extract the host portion of the UNC string */ |
780 | static char * | |
781 | extract_hostname(const char *unc) | |
782 | { | |
783 | const char *src; | |
784 | char *dst, *delim; | |
785 | unsigned int len; | |
786 | ||
787 | /* skip double chars at beginning of string */ | |
788 | /* BB: check validity of these bytes? */ | |
789 | src = unc + 2; | |
790 | ||
791 | /* delimiter between hostname and sharename is always '\\' now */ | |
792 | delim = strchr(src, '\\'); | |
793 | if (!delim) | |
794 | return ERR_PTR(-EINVAL); | |
795 | ||
796 | len = delim - src; | |
797 | dst = kmalloc((len + 1), GFP_KERNEL); | |
798 | if (dst == NULL) | |
799 | return ERR_PTR(-ENOMEM); | |
800 | ||
801 | memcpy(dst, src, len); | |
802 | dst[len] = '\0'; | |
803 | ||
804 | return dst; | |
805 | } | |
806 | ||
1da177e4 | 807 | static int |
50c2f753 SF |
808 | cifs_parse_mount_options(char *options, const char *devname, |
809 | struct smb_vol *vol) | |
1da177e4 LT |
810 | { |
811 | char *value; | |
812 | char *data; | |
813 | unsigned int temp_len, i, j; | |
814 | char separator[2]; | |
9b9d6b24 JL |
815 | short int override_uid = -1; |
816 | short int override_gid = -1; | |
817 | bool uid_specified = false; | |
818 | bool gid_specified = false; | |
88463999 | 819 | char *nodename = utsname()->nodename; |
1da177e4 LT |
820 | |
821 | separator[0] = ','; | |
50c2f753 | 822 | separator[1] = 0; |
1da177e4 | 823 | |
88463999 JL |
824 | /* |
825 | * does not have to be perfect mapping since field is | |
826 | * informational, only used for servers that do not support | |
827 | * port 445 and it can be overridden at mount time | |
828 | */ | |
1397f2ee JL |
829 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
830 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
831 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
832 | ||
1397f2ee | 833 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
834 | /* null target name indicates to use *SMBSERVR default called name |
835 | if we end up sending RFC1001 session initialize */ | |
836 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
837 | vol->cred_uid = current_uid(); |
838 | vol->linux_uid = current_uid(); | |
a001e5b5 | 839 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
840 | |
841 | /* default to only allowing write access to owner of the mount */ | |
842 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
843 | |
844 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
845 | /* default is always to request posix paths. */ |
846 | vol->posix_paths = 1; | |
a0c9217f JL |
847 | /* default to using server inode numbers where available */ |
848 | vol->server_ino = 1; | |
ac67055e | 849 | |
6d20e840 SJ |
850 | vol->actimeo = CIFS_DEF_ACTIMEO; |
851 | ||
1da177e4 LT |
852 | if (!options) |
853 | return 1; | |
854 | ||
50c2f753 | 855 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 856 | if (options[4] != 0) { |
1da177e4 LT |
857 | separator[0] = options[4]; |
858 | options += 5; | |
859 | } else { | |
b6b38f70 | 860 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
861 | } |
862 | } | |
50c2f753 | 863 | |
1da177e4 LT |
864 | while ((data = strsep(&options, separator)) != NULL) { |
865 | if (!*data) | |
866 | continue; | |
867 | if ((value = strchr(data, '=')) != NULL) | |
868 | *value++ = '\0'; | |
869 | ||
50c2f753 SF |
870 | /* Have to parse this before we parse for "user" */ |
871 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 872 | vol->no_xattr = 0; |
50c2f753 | 873 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
874 | vol->no_xattr = 1; |
875 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 876 | if (!value) { |
1da177e4 LT |
877 | printk(KERN_WARNING |
878 | "CIFS: invalid or missing username\n"); | |
879 | return 1; /* needs_arg; */ | |
fb8c4b14 | 880 | } else if (!*value) { |
4b952a9b SF |
881 | /* null user, ie anonymous, authentication */ |
882 | vol->nullauth = 1; | |
1da177e4 | 883 | } |
8727c8a8 SF |
884 | if (strnlen(value, MAX_USERNAME_SIZE) < |
885 | MAX_USERNAME_SIZE) { | |
1da177e4 LT |
886 | vol->username = value; |
887 | } else { | |
888 | printk(KERN_WARNING "CIFS: username too long\n"); | |
889 | return 1; | |
890 | } | |
891 | } else if (strnicmp(data, "pass", 4) == 0) { | |
892 | if (!value) { | |
893 | vol->password = NULL; | |
894 | continue; | |
fb8c4b14 | 895 | } else if (value[0] == 0) { |
1da177e4 LT |
896 | /* check if string begins with double comma |
897 | since that would mean the password really | |
898 | does start with a comma, and would not | |
899 | indicate an empty string */ | |
fb8c4b14 | 900 | if (value[1] != separator[0]) { |
1da177e4 LT |
901 | vol->password = NULL; |
902 | continue; | |
903 | } | |
904 | } | |
905 | temp_len = strlen(value); | |
906 | /* removed password length check, NTLM passwords | |
907 | can be arbitrarily long */ | |
908 | ||
50c2f753 | 909 | /* if comma in password, the string will be |
1da177e4 LT |
910 | prematurely null terminated. Commas in password are |
911 | specified across the cifs mount interface by a double | |
912 | comma ie ,, and a comma used as in other cases ie ',' | |
913 | as a parameter delimiter/separator is single and due | |
914 | to the strsep above is temporarily zeroed. */ | |
915 | ||
916 | /* NB: password legally can have multiple commas and | |
917 | the only illegal character in a password is null */ | |
918 | ||
50c2f753 | 919 | if ((value[temp_len] == 0) && |
09d1db5c | 920 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
921 | /* reinsert comma */ |
922 | value[temp_len] = separator[0]; | |
50c2f753 SF |
923 | temp_len += 2; /* move after second comma */ |
924 | while (value[temp_len] != 0) { | |
1da177e4 | 925 | if (value[temp_len] == separator[0]) { |
50c2f753 | 926 | if (value[temp_len+1] == |
09d1db5c SF |
927 | separator[0]) { |
928 | /* skip second comma */ | |
929 | temp_len++; | |
50c2f753 | 930 | } else { |
1da177e4 LT |
931 | /* single comma indicating start |
932 | of next parm */ | |
933 | break; | |
934 | } | |
935 | } | |
936 | temp_len++; | |
937 | } | |
fb8c4b14 | 938 | if (value[temp_len] == 0) { |
1da177e4 LT |
939 | options = NULL; |
940 | } else { | |
941 | value[temp_len] = 0; | |
942 | /* point option to start of next parm */ | |
943 | options = value + temp_len + 1; | |
944 | } | |
50c2f753 | 945 | /* go from value to value + temp_len condensing |
1da177e4 LT |
946 | double commas to singles. Note that this ends up |
947 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 948 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 949 | if (vol->password == NULL) { |
50c2f753 SF |
950 | printk(KERN_WARNING "CIFS: no memory " |
951 | "for password\n"); | |
433dc24f SF |
952 | return 1; |
953 | } | |
50c2f753 | 954 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 955 | vol->password[j] = value[i]; |
fb8c4b14 | 956 | if (value[i] == separator[0] |
09d1db5c | 957 | && value[i+1] == separator[0]) { |
1da177e4 LT |
958 | /* skip second comma */ |
959 | i++; | |
960 | } | |
961 | } | |
962 | vol->password[j] = 0; | |
963 | } else { | |
e915fc49 | 964 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 965 | if (vol->password == NULL) { |
50c2f753 SF |
966 | printk(KERN_WARNING "CIFS: no memory " |
967 | "for password\n"); | |
433dc24f SF |
968 | return 1; |
969 | } | |
1da177e4 LT |
970 | strcpy(vol->password, value); |
971 | } | |
58f7f68f JL |
972 | } else if (!strnicmp(data, "ip", 2) || |
973 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
974 | if (!value || !*value) { |
975 | vol->UNCip = NULL; | |
50b64e3b JL |
976 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
977 | INET6_ADDRSTRLEN) { | |
1da177e4 LT |
978 | vol->UNCip = value; |
979 | } else { | |
50c2f753 SF |
980 | printk(KERN_WARNING "CIFS: ip address " |
981 | "too long\n"); | |
1da177e4 LT |
982 | return 1; |
983 | } | |
50c2f753 SF |
984 | } else if (strnicmp(data, "sec", 3) == 0) { |
985 | if (!value || !*value) { | |
b6b38f70 | 986 | cERROR(1, "no security value specified"); |
50c2f753 SF |
987 | continue; |
988 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
989 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 990 | CIFSSEC_MUST_SIGN; |
bf820679 | 991 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
992 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
993 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 994 | cERROR(1, "Krb5 cifs privacy not supported"); |
bf820679 SF |
995 | return 1; |
996 | } else if (strnicmp(value, "krb5", 4) == 0) { | |
750d1151 | 997 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
998 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
999 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1000 | CIFSSEC_MUST_SIGN; | |
1001 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1002 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1003 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1004 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1005 | CIFSSEC_MUST_SIGN; |
bf820679 | 1006 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1007 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1008 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1009 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1010 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1011 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1012 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1013 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1014 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1015 | /* BB is there a better way to do this? */ |
750d1151 | 1016 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1017 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1018 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1019 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1020 | #endif |
bf820679 | 1021 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1022 | vol->nullauth = 1; |
50c2f753 | 1023 | } else { |
b6b38f70 | 1024 | cERROR(1, "bad security option: %s", value); |
50c2f753 SF |
1025 | return 1; |
1026 | } | |
1da177e4 LT |
1027 | } else if ((strnicmp(data, "unc", 3) == 0) |
1028 | || (strnicmp(data, "target", 6) == 0) | |
1029 | || (strnicmp(data, "path", 4) == 0)) { | |
1030 | if (!value || !*value) { | |
50c2f753 SF |
1031 | printk(KERN_WARNING "CIFS: invalid path to " |
1032 | "network resource\n"); | |
1da177e4 LT |
1033 | return 1; /* needs_arg; */ |
1034 | } | |
1035 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1036 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1037 | if (vol->UNC == NULL) |
1da177e4 | 1038 | return 1; |
50c2f753 | 1039 | strcpy(vol->UNC, value); |
1da177e4 LT |
1040 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1041 | vol->UNC[0] = '\\'; | |
1042 | vol->UNC[1] = '\\'; | |
50c2f753 | 1043 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1044 | printk(KERN_WARNING |
50c2f753 SF |
1045 | "CIFS: UNC Path does not begin " |
1046 | "with // or \\\\ \n"); | |
1da177e4 LT |
1047 | return 1; |
1048 | } | |
1049 | } else { | |
1050 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1051 | return 1; | |
1052 | } | |
1053 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1054 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1055 | if (!value || !*value) { | |
1056 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
1057 | return 1; /* needs_arg; */ | |
1058 | } | |
1059 | /* BB are there cases in which a comma can be valid in | |
1060 | a domain name and need special handling? */ | |
3979877e | 1061 | if (strnlen(value, 256) < 256) { |
1da177e4 | 1062 | vol->domainname = value; |
b6b38f70 | 1063 | cFYI(1, "Domain name set"); |
1da177e4 | 1064 | } else { |
50c2f753 SF |
1065 | printk(KERN_WARNING "CIFS: domain name too " |
1066 | "long\n"); | |
1da177e4 LT |
1067 | return 1; |
1068 | } | |
3eb9a889 BG |
1069 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1070 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1071 | ||
1072 | if (!value || !*value) { | |
1073 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1074 | " not specified.\n"); | |
1075 | return 1; /* needs_arg; */ | |
1076 | } | |
1077 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1078 | value, strlen(value)); | |
b235f371 | 1079 | if (i == 0) { |
3eb9a889 BG |
1080 | printk(KERN_WARNING "CIFS: Could not parse" |
1081 | " srcaddr: %s\n", | |
1082 | value); | |
1083 | return 1; | |
1084 | } | |
50c2f753 SF |
1085 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1086 | if (!value || !*value) { | |
1087 | printk(KERN_WARNING | |
1088 | "CIFS: invalid path prefix\n"); | |
1089 | return 1; /* needs_argument */ | |
1090 | } | |
1091 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1092 | if (value[0] != '/') |
2fe87f02 | 1093 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1094 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1095 | if (vol->prepath == NULL) | |
1096 | return 1; | |
4523cc30 | 1097 | if (value[0] != '/') { |
2fe87f02 | 1098 | vol->prepath[0] = '/'; |
50c2f753 | 1099 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1100 | } else |
50c2f753 | 1101 | strcpy(vol->prepath, value); |
b6b38f70 | 1102 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1103 | } else { |
1104 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1105 | return 1; | |
1106 | } | |
1da177e4 LT |
1107 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1108 | if (!value || !*value) { | |
63135e08 SF |
1109 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1110 | "specified\n"); | |
1da177e4 LT |
1111 | return 1; /* needs_arg; */ |
1112 | } | |
1113 | if (strnlen(value, 65) < 65) { | |
50c2f753 | 1114 | if (strnicmp(value, "default", 7)) |
1da177e4 | 1115 | vol->iocharset = value; |
50c2f753 SF |
1116 | /* if iocharset not set then load_nls_default |
1117 | is used by caller */ | |
b6b38f70 | 1118 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1119 | } else { |
63135e08 SF |
1120 | printk(KERN_WARNING "CIFS: iocharset name " |
1121 | "too long.\n"); | |
1da177e4 LT |
1122 | return 1; |
1123 | } | |
9b9d6b24 JL |
1124 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1125 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1126 | uid_specified = true; | |
bd763319 JL |
1127 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1128 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1129 | } else if (!strnicmp(data, "forceuid", 8)) { |
1130 | override_uid = 1; | |
1131 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1132 | override_uid = 0; | |
1133 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1134 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1135 | gid_specified = true; | |
1136 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1137 | override_gid = 1; | |
1138 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1139 | override_gid = 0; | |
1da177e4 LT |
1140 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1141 | if (value && *value) { | |
1142 | vol->file_mode = | |
1143 | simple_strtoul(value, &value, 0); | |
1144 | } | |
1145 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1146 | if (value && *value) { | |
1147 | vol->dir_mode = | |
1148 | simple_strtoul(value, &value, 0); | |
1149 | } | |
1150 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1151 | if (value && *value) { | |
1152 | vol->dir_mode = | |
1153 | simple_strtoul(value, &value, 0); | |
1154 | } | |
1155 | } else if (strnicmp(data, "port", 4) == 0) { | |
1156 | if (value && *value) { | |
1157 | vol->port = | |
1158 | simple_strtoul(value, &value, 0); | |
1159 | } | |
1160 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1161 | if (value && *value) { | |
1162 | vol->rsize = | |
1163 | simple_strtoul(value, &value, 0); | |
1164 | } | |
1165 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1166 | if (value && *value) { | |
1167 | vol->wsize = | |
1168 | simple_strtoul(value, &value, 0); | |
1169 | } | |
1170 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1171 | if (!value || !*value) { |
b6b38f70 | 1172 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1173 | continue; |
1174 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1175 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1176 | } |
1177 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1178 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1179 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1180 | } else { |
1397f2ee JL |
1181 | memset(vol->source_rfc1001_name, 0x20, |
1182 | RFC1001_NAME_LEN); | |
1183 | /* | |
1184 | * FIXME: are there cases in which a comma can | |
1185 | * be valid in workstation netbios name (and | |
1186 | * need special handling)? | |
1187 | */ | |
1188 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1189 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1190 | if (value[i] == 0) |
1da177e4 | 1191 | break; |
1397f2ee | 1192 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1193 | } |
1194 | /* The string has 16th byte zero still from | |
1195 | set at top of the function */ | |
1397f2ee | 1196 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1197 | printk(KERN_WARNING "CIFS: netbiosname" |
1198 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1199 | } |
1200 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1201 | /* servernetbiosname specified override *SMBSERVER */ | |
1202 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1203 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1204 | } else { |
1205 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1206 | memset(vol->target_rfc1001_name, 0x20, |
1207 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1208 | |
50c2f753 | 1209 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1210 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1211 | valid in this workstation netbios name |
1212 | (and need special handling)? */ | |
a10faeb2 | 1213 | |
50c2f753 SF |
1214 | /* user or mount helper must uppercase |
1215 | the netbiosname */ | |
1216 | if (value[i] == 0) | |
a10faeb2 SF |
1217 | break; |
1218 | else | |
50c2f753 SF |
1219 | vol->target_rfc1001_name[i] = |
1220 | value[i]; | |
a10faeb2 SF |
1221 | } |
1222 | /* The string has 16th byte zero still from | |
1223 | set at top of the function */ | |
1397f2ee | 1224 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1225 | printk(KERN_WARNING "CIFS: server net" |
1226 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1227 | } |
6d20e840 SJ |
1228 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1229 | if (value && *value) { | |
1230 | vol->actimeo = HZ * simple_strtoul(value, | |
1231 | &value, 0); | |
1232 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1233 | cERROR(1, "CIFS: attribute cache" | |
1234 | "timeout too large"); | |
1235 | return 1; | |
1236 | } | |
1237 | } | |
1da177e4 LT |
1238 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1239 | /* ignore */ | |
1240 | } else if (strnicmp(data, "version", 3) == 0) { | |
1241 | /* ignore */ | |
50c2f753 | 1242 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1243 | /* ignore */ |
71a394fa SF |
1244 | } else if (strnicmp(data, "rw", 2) == 0) { |
1245 | /* ignore */ | |
1246 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1247 | /* ignore */ | |
edf1ae40 SF |
1248 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1249 | vol->noblocksnd = 1; | |
1250 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1251 | vol->noautotune = 1; | |
1da177e4 LT |
1252 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1253 | (strnicmp(data, "nosuid", 6) == 0) || | |
1254 | (strnicmp(data, "exec", 4) == 0) || | |
1255 | (strnicmp(data, "noexec", 6) == 0) || | |
1256 | (strnicmp(data, "nodev", 5) == 0) || | |
1257 | (strnicmp(data, "noauto", 6) == 0) || | |
1258 | (strnicmp(data, "dev", 3) == 0)) { | |
1259 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1260 | uses these opts to set flags, and the flags are read |
1261 | by the kernel vfs layer before we get here (ie | |
1262 | before read super) so there is no point trying to | |
1263 | parse these options again and set anything and it | |
1264 | is ok to just ignore them */ | |
1da177e4 | 1265 | continue; |
1da177e4 LT |
1266 | } else if (strnicmp(data, "hard", 4) == 0) { |
1267 | vol->retry = 1; | |
1268 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1269 | vol->retry = 0; | |
1270 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1271 | vol->noperm = 0; | |
1272 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1273 | vol->noperm = 1; | |
6a0b4824 SF |
1274 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1275 | vol->remap = 1; | |
1276 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1277 | vol->remap = 0; | |
50c2f753 SF |
1278 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1279 | vol->sfu_emul = 1; | |
1280 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1281 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1282 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1283 | vol->nodfs = 1; | |
ac67055e JA |
1284 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1285 | vol->posix_paths = 1; | |
1286 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1287 | vol->posix_paths = 0; | |
c18c842b SF |
1288 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1289 | vol->no_linux_ext = 1; | |
1290 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1291 | vol->no_linux_ext = 1; | |
50c2f753 | 1292 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1293 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1294 | vol->nocase = 1; |
f636a348 JL |
1295 | } else if (strnicmp(data, "mand", 4) == 0) { |
1296 | /* ignore */ | |
1297 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1298 | /* ignore */ | |
1299 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1300 | /* ignore */ | |
c46fa8ac SF |
1301 | } else if (strnicmp(data, "brl", 3) == 0) { |
1302 | vol->nobrl = 0; | |
50c2f753 | 1303 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1304 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1305 | vol->nobrl = 1; |
d3485d37 SF |
1306 | /* turn off mandatory locking in mode |
1307 | if remote locking is turned off since the | |
1308 | local vfs will do advisory */ | |
50c2f753 SF |
1309 | if (vol->file_mode == |
1310 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1311 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1312 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1313 | /* will take the shorter form "forcemand" as well */ | |
1314 | /* This mount option will force use of mandatory | |
1315 | (DOS/Windows style) byte range locks, instead of | |
1316 | using posix advisory byte range locks, even if the | |
1317 | Unix extensions are available and posix locks would | |
1318 | be supported otherwise. If Unix extensions are not | |
1319 | negotiated this has no effect since mandatory locks | |
1320 | would be used (mandatory locks is all that those | |
1321 | those servers support) */ | |
1322 | vol->mand_lock = 1; | |
1da177e4 LT |
1323 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1324 | vol->setuids = 1; | |
1325 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1326 | vol->setuids = 0; | |
d0a9c078 JL |
1327 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1328 | vol->dynperm = true; | |
1329 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1330 | vol->dynperm = false; | |
1da177e4 LT |
1331 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1332 | vol->retry = 0; | |
1333 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1334 | vol->retry = 1; | |
1335 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1336 | vol->intr = 0; | |
1337 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1338 | vol->intr = 1; | |
be652445 SF |
1339 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1340 | vol->nostrictsync = 1; | |
1341 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1342 | vol->nostrictsync = 0; | |
50c2f753 | 1343 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1344 | vol->server_ino = 1; |
50c2f753 | 1345 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1346 | vol->server_ino = 0; |
50c2f753 | 1347 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1348 | vol->cifs_acl = 1; |
1349 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1350 | vol->cifs_acl = 0; | |
50c2f753 | 1351 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1352 | vol->no_psx_acl = 0; |
50c2f753 | 1353 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1354 | vol->no_psx_acl = 1; |
84210e91 SF |
1355 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1356 | vol->local_lease = 1; | |
50c2f753 | 1357 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1358 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1359 | } else if (strnicmp(data, "seal", 4) == 0) { |
1360 | /* we do not do the following in secFlags because seal | |
1361 | is a per tree connection (mount) not a per socket | |
1362 | or per-smb connection option in the protocol */ | |
1363 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1364 | vol->seal = 1; | |
50c2f753 | 1365 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1366 | vol->direct_io = 1; |
50c2f753 | 1367 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1368 | vol->direct_io = 1; |
d39454ff PS |
1369 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1370 | vol->strict_io = 1; | |
1da177e4 | 1371 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1372 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1373 | "supported. Instead set " | |
1374 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1375 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d SJ |
1376 | #ifndef CONFIG_CIFS_FSCACHE |
1377 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" | |
1378 | "kernel config option set"); | |
1379 | return 1; | |
1380 | #endif | |
fa1df75d | 1381 | vol->fsc = true; |
736a3320 SM |
1382 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1383 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1384 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1385 | vol->multiuser = true; | |
1da177e4 | 1386 | } else |
50c2f753 SF |
1387 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1388 | data); | |
1da177e4 LT |
1389 | } |
1390 | if (vol->UNC == NULL) { | |
4523cc30 | 1391 | if (devname == NULL) { |
50c2f753 SF |
1392 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1393 | "target\n"); | |
1da177e4 LT |
1394 | return 1; |
1395 | } | |
1396 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1397 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1398 | if (vol->UNC == NULL) |
1da177e4 | 1399 | return 1; |
50c2f753 | 1400 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1401 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1402 | vol->UNC[0] = '\\'; | |
1403 | vol->UNC[1] = '\\'; | |
1404 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1405 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1406 | "begin with // or \\\\ \n"); | |
1da177e4 LT |
1407 | return 1; |
1408 | } | |
7c5e628f IM |
1409 | value = strpbrk(vol->UNC+2, "/\\"); |
1410 | if (value) | |
1411 | *value = '\\'; | |
1da177e4 LT |
1412 | } else { |
1413 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1414 | return 1; | |
1415 | } | |
1416 | } | |
0eb8a132 JL |
1417 | |
1418 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1419 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1420 | "authentication!"); | |
1421 | return 1; | |
1422 | } | |
1423 | ||
fb8c4b14 | 1424 | if (vol->UNCip == NULL) |
1da177e4 LT |
1425 | vol->UNCip = &vol->UNC[2]; |
1426 | ||
9b9d6b24 JL |
1427 | if (uid_specified) |
1428 | vol->override_uid = override_uid; | |
1429 | else if (override_uid == 1) | |
1430 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1431 | "specified with no uid= option.\n"); | |
1432 | ||
1433 | if (gid_specified) | |
1434 | vol->override_gid = override_gid; | |
1435 | else if (override_gid == 1) | |
1436 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1437 | "specified with no gid= option.\n"); | |
1438 | ||
1da177e4 LT |
1439 | return 0; |
1440 | } | |
1441 | ||
3eb9a889 BG |
1442 | /** Returns true if srcaddr isn't specified and rhs isn't |
1443 | * specified, or if srcaddr is specified and | |
1444 | * matches the IP address of the rhs argument. | |
1445 | */ | |
1446 | static bool | |
1447 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1448 | { | |
1449 | switch (srcaddr->sa_family) { | |
1450 | case AF_UNSPEC: | |
1451 | return (rhs->sa_family == AF_UNSPEC); | |
1452 | case AF_INET: { | |
1453 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1454 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1455 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1456 | } | |
1457 | case AF_INET6: { | |
1458 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1459 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1460 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1461 | } | |
1462 | default: | |
1463 | WARN_ON(1); | |
1464 | return false; /* don't expect to be here */ | |
1465 | } | |
1466 | } | |
1467 | ||
4b886136 PS |
1468 | /* |
1469 | * If no port is specified in addr structure, we try to match with 445 port | |
1470 | * and if it fails - with 139 ports. It should be called only if address | |
1471 | * families of server and addr are equal. | |
1472 | */ | |
1473 | static bool | |
1474 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1475 | { | |
6da97910 | 1476 | __be16 port, *sport; |
4b886136 PS |
1477 | |
1478 | switch (addr->sa_family) { | |
1479 | case AF_INET: | |
1480 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1481 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1482 | break; | |
1483 | case AF_INET6: | |
1484 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1485 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1486 | break; | |
1487 | default: | |
1488 | WARN_ON(1); | |
1489 | return false; | |
1490 | } | |
1491 | ||
1492 | if (!port) { | |
1493 | port = htons(CIFS_PORT); | |
1494 | if (port == *sport) | |
1495 | return true; | |
1496 | ||
1497 | port = htons(RFC1001_PORT); | |
1498 | } | |
1499 | ||
1500 | return port == *sport; | |
1501 | } | |
3eb9a889 | 1502 | |
4515148e | 1503 | static bool |
3eb9a889 BG |
1504 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1505 | struct sockaddr *srcaddr) | |
4515148e | 1506 | { |
4515148e | 1507 | switch (addr->sa_family) { |
a9f1b85e PS |
1508 | case AF_INET: { |
1509 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1510 | struct sockaddr_in *srv_addr4 = | |
1511 | (struct sockaddr_in *)&server->dstaddr; | |
1512 | ||
1513 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1514 | return false; |
4515148e | 1515 | break; |
a9f1b85e PS |
1516 | } |
1517 | case AF_INET6: { | |
1518 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1519 | struct sockaddr_in6 *srv_addr6 = | |
1520 | (struct sockaddr_in6 *)&server->dstaddr; | |
1521 | ||
4515148e | 1522 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1523 | &srv_addr6->sin6_addr)) |
4515148e | 1524 | return false; |
a9f1b85e | 1525 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1526 | return false; |
4515148e JL |
1527 | break; |
1528 | } | |
a9f1b85e PS |
1529 | default: |
1530 | WARN_ON(1); | |
1531 | return false; /* don't expect to be here */ | |
1532 | } | |
4515148e | 1533 | |
3eb9a889 BG |
1534 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1535 | return false; | |
1536 | ||
4515148e JL |
1537 | return true; |
1538 | } | |
1539 | ||
daf5b0b6 JL |
1540 | static bool |
1541 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1542 | { | |
1543 | unsigned int secFlags; | |
1544 | ||
1545 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1546 | secFlags = vol->secFlg; | |
1547 | else | |
1548 | secFlags = global_secflags | vol->secFlg; | |
1549 | ||
1550 | switch (server->secType) { | |
1551 | case LANMAN: | |
1552 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1553 | return false; | |
1554 | break; | |
1555 | case NTLMv2: | |
1556 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1557 | return false; | |
1558 | break; | |
1559 | case NTLM: | |
1560 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1561 | return false; | |
1562 | break; | |
1563 | case Kerberos: | |
1564 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1565 | return false; | |
1566 | break; | |
1567 | case RawNTLMSSP: | |
1568 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1569 | return false; | |
1570 | break; | |
1571 | default: | |
1572 | /* shouldn't happen */ | |
1573 | return false; | |
1574 | } | |
1575 | ||
25985edc | 1576 | /* now check if signing mode is acceptable */ |
daf5b0b6 JL |
1577 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
1578 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1579 | return false; | |
1580 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1581 | (server->secMode & | |
1582 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1583 | return false; | |
1584 | ||
1585 | return true; | |
1586 | } | |
1587 | ||
e7ddee90 | 1588 | static struct TCP_Server_Info * |
daf5b0b6 | 1589 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1590 | { |
e7ddee90 | 1591 | struct TCP_Server_Info *server; |
e7ddee90 | 1592 | |
3f9bcca7 | 1593 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1594 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
f1d0c998 RL |
1595 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
1596 | continue; | |
1597 | ||
3eb9a889 BG |
1598 | if (!match_address(server, addr, |
1599 | (struct sockaddr *)&vol->srcaddr)) | |
4515148e | 1600 | continue; |
1b20d672 | 1601 | |
4b886136 PS |
1602 | if (!match_port(server, addr)) |
1603 | continue; | |
1604 | ||
daf5b0b6 JL |
1605 | if (!match_security(server, vol)) |
1606 | continue; | |
1607 | ||
e7ddee90 | 1608 | ++server->srv_count; |
3f9bcca7 | 1609 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1610 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1611 | return server; |
1da177e4 | 1612 | } |
3f9bcca7 | 1613 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1614 | return NULL; |
1615 | } | |
1b20d672 | 1616 | |
14fbf50d | 1617 | static void |
e7ddee90 | 1618 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1619 | { |
e7ddee90 | 1620 | struct task_struct *task; |
1b20d672 | 1621 | |
3f9bcca7 | 1622 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1623 | if (--server->srv_count > 0) { |
3f9bcca7 | 1624 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1625 | return; |
1da177e4 | 1626 | } |
1b20d672 | 1627 | |
f1d0c998 RL |
1628 | put_net(cifs_net_ns(server)); |
1629 | ||
e7ddee90 | 1630 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1631 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1632 | |
c74093b6 JL |
1633 | cancel_delayed_work_sync(&server->echo); |
1634 | ||
e7ddee90 JL |
1635 | spin_lock(&GlobalMid_Lock); |
1636 | server->tcpStatus = CifsExiting; | |
1637 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1638 | |
d2b91521 | 1639 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1640 | cifs_fscache_release_client_cookie(server); |
1641 | ||
21e73393 SP |
1642 | kfree(server->session_key.response); |
1643 | server->session_key.response = NULL; | |
1644 | server->session_key.len = 0; | |
1645 | ||
e7ddee90 JL |
1646 | task = xchg(&server->tsk, NULL); |
1647 | if (task) | |
1648 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1649 | } |
1650 | ||
63c038c2 JL |
1651 | static struct TCP_Server_Info * |
1652 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1653 | { | |
1654 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1655 | struct sockaddr_storage addr; |
63c038c2 JL |
1656 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1657 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1658 | int rc; | |
1659 | ||
a9ac49d3 | 1660 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1661 | |
b6b38f70 | 1662 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1663 | |
1e68b2b2 | 1664 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1665 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1666 | volume_info->UNCip, | |
67b7626a | 1667 | strlen(volume_info->UNCip), |
50d97160 | 1668 | volume_info->port); |
1e68b2b2 | 1669 | if (!rc) { |
63c038c2 JL |
1670 | /* we failed translating address */ |
1671 | rc = -EINVAL; | |
1672 | goto out_err; | |
1673 | } | |
63c038c2 JL |
1674 | } else if (volume_info->UNCip) { |
1675 | /* BB using ip addr as tcp_ses name to connect to the | |
1676 | DFS root below */ | |
b6b38f70 | 1677 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1678 | rc = -EINVAL; |
1679 | goto out_err; | |
1680 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1681 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1682 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1683 | rc = -EINVAL; |
1684 | goto out_err; | |
1685 | } | |
1686 | ||
1687 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1688 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1689 | if (tcp_ses) |
1690 | return tcp_ses; | |
1691 | ||
1692 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1693 | if (!tcp_ses) { | |
1694 | rc = -ENOMEM; | |
1695 | goto out_err; | |
1696 | } | |
1697 | ||
d2b91521 SP |
1698 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1699 | if (rc) { | |
1700 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1701 | goto out_err; | |
1702 | } | |
1703 | ||
f1d0c998 | 1704 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1705 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1706 | if (IS_ERR(tcp_ses->hostname)) { | |
1707 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1708 | goto out_err_crypto_release; |
63c038c2 JL |
1709 | } |
1710 | ||
1711 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1712 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1713 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1714 | atomic_set(&tcp_ses->inFlight, 0); |
1715 | init_waitqueue_head(&tcp_ses->response_q); | |
1716 | init_waitqueue_head(&tcp_ses->request_q); | |
1717 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1718 | mutex_init(&tcp_ses->srv_mutex); | |
1719 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1720 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1721 | memcpy(tcp_ses->server_RFC1001_name, | |
1722 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1723 | tcp_ses->session_estab = false; |
63c038c2 | 1724 | tcp_ses->sequence_number = 0; |
fda35943 | 1725 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1726 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1727 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1728 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1729 | |
1730 | /* | |
1731 | * at this point we are the only ones with the pointer | |
1732 | * to the struct since the kernel thread not created yet | |
1733 | * no need to spinlock this init of tcpStatus or srv_count | |
1734 | */ | |
1735 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1736 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1737 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1738 | ++tcp_ses->srv_count; |
1739 | ||
a9ac49d3 | 1740 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1741 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1742 | /* BB should we allow ipv6 on port 139? */ |
1743 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1744 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1745 | sizeof(struct sockaddr_in6)); | |
1746 | } else | |
1747 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1748 | sizeof(struct sockaddr_in)); | |
1749 | ||
1750 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1751 | if (rc < 0) { |
b6b38f70 | 1752 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1753 | goto out_err_crypto_release; |
63c038c2 JL |
1754 | } |
1755 | ||
1756 | /* | |
1757 | * since we're in a cifs function already, we know that | |
1758 | * this will succeed. No need for try_module_get(). | |
1759 | */ | |
1760 | __module_get(THIS_MODULE); | |
1761 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1762 | tcp_ses, "cifsd"); | |
1763 | if (IS_ERR(tcp_ses->tsk)) { | |
1764 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1765 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1766 | module_put(THIS_MODULE); |
f7c5445a | 1767 | goto out_err_crypto_release; |
63c038c2 JL |
1768 | } |
1769 | ||
1770 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1771 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1772 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1773 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1774 | |
488f1d2d SJ |
1775 | cifs_fscache_get_client_cookie(tcp_ses); |
1776 | ||
c74093b6 JL |
1777 | /* queue echo request delayed work */ |
1778 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1779 | ||
63c038c2 JL |
1780 | return tcp_ses; |
1781 | ||
f7c5445a | 1782 | out_err_crypto_release: |
d2b91521 SP |
1783 | cifs_crypto_shash_release(tcp_ses); |
1784 | ||
f1d0c998 RL |
1785 | put_net(cifs_net_ns(tcp_ses)); |
1786 | ||
63c038c2 JL |
1787 | out_err: |
1788 | if (tcp_ses) { | |
8347a5cd SF |
1789 | if (!IS_ERR(tcp_ses->hostname)) |
1790 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1791 | if (tcp_ses->ssocket) |
1792 | sock_release(tcp_ses->ssocket); | |
1793 | kfree(tcp_ses); | |
1794 | } | |
1795 | return ERR_PTR(rc); | |
1796 | } | |
1797 | ||
14fbf50d | 1798 | static struct cifsSesInfo * |
4ff67b72 | 1799 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1800 | { |
14fbf50d | 1801 | struct cifsSesInfo *ses; |
dea570e0 | 1802 | |
3f9bcca7 | 1803 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 JL |
1804 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
1805 | switch (server->secType) { | |
1806 | case Kerberos: | |
3e4b3e1f | 1807 | if (vol->cred_uid != ses->cred_uid) |
4ff67b72 JL |
1808 | continue; |
1809 | break; | |
1810 | default: | |
1811 | /* anything else takes username/password */ | |
8727c8a8 SF |
1812 | if (ses->user_name == NULL) |
1813 | continue; | |
1814 | if (strncmp(ses->user_name, vol->username, | |
4ff67b72 JL |
1815 | MAX_USERNAME_SIZE)) |
1816 | continue; | |
1817 | if (strlen(vol->username) != 0 && | |
24e6cf92 | 1818 | ses->password != NULL && |
fc87a406 JL |
1819 | strncmp(ses->password, |
1820 | vol->password ? vol->password : "", | |
4ff67b72 JL |
1821 | MAX_PASSWORD_SIZE)) |
1822 | continue; | |
1823 | } | |
14fbf50d | 1824 | ++ses->ses_count; |
3f9bcca7 | 1825 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1826 | return ses; |
1827 | } | |
3f9bcca7 | 1828 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1829 | return NULL; |
1830 | } | |
dea570e0 | 1831 | |
14fbf50d JL |
1832 | static void |
1833 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1834 | { | |
1835 | int xid; | |
1836 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1837 | |
36988c76 | 1838 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1839 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1840 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1841 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1842 | return; |
1843 | } | |
dea570e0 | 1844 | |
14fbf50d | 1845 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1846 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1847 | |
14fbf50d JL |
1848 | if (ses->status == CifsGood) { |
1849 | xid = GetXid(); | |
1850 | CIFSSMBLogoff(xid, ses); | |
1851 | _FreeXid(xid); | |
1852 | } | |
1853 | sesInfoFree(ses); | |
1854 | cifs_put_tcp_session(server); | |
1855 | } | |
dea570e0 | 1856 | |
36988c76 JL |
1857 | static struct cifsSesInfo * |
1858 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1859 | { | |
1860 | int rc = -ENOMEM, xid; | |
1861 | struct cifsSesInfo *ses; | |
a9f1b85e PS |
1862 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1863 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1864 | |
1865 | xid = GetXid(); | |
1866 | ||
4ff67b72 | 1867 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1868 | if (ses) { |
1869 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1870 | ||
36988c76 | 1871 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1872 | rc = cifs_negotiate_protocol(xid, ses); |
1873 | if (rc) { | |
1874 | mutex_unlock(&ses->session_mutex); | |
1875 | /* problem -- put our ses reference */ | |
1876 | cifs_put_smb_ses(ses); | |
1877 | FreeXid(xid); | |
1878 | return ERR_PTR(rc); | |
1879 | } | |
36988c76 JL |
1880 | if (ses->need_reconnect) { |
1881 | cFYI(1, "Session needs reconnect"); | |
1882 | rc = cifs_setup_session(xid, ses, | |
1883 | volume_info->local_nls); | |
1884 | if (rc) { | |
1885 | mutex_unlock(&ses->session_mutex); | |
1886 | /* problem -- put our reference */ | |
1887 | cifs_put_smb_ses(ses); | |
1888 | FreeXid(xid); | |
1889 | return ERR_PTR(rc); | |
1890 | } | |
1891 | } | |
1892 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1893 | |
1894 | /* existing SMB ses has a server reference already */ | |
1895 | cifs_put_tcp_session(server); | |
36988c76 JL |
1896 | FreeXid(xid); |
1897 | return ses; | |
1898 | } | |
1899 | ||
1900 | cFYI(1, "Existing smb sess not found"); | |
1901 | ses = sesInfoAlloc(); | |
1902 | if (ses == NULL) | |
1903 | goto get_ses_fail; | |
1904 | ||
1905 | /* new SMB session uses our server ref */ | |
1906 | ses->server = server; | |
a9f1b85e PS |
1907 | if (server->dstaddr.ss_family == AF_INET6) |
1908 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 1909 | else |
a9f1b85e | 1910 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 1911 | |
8727c8a8 SF |
1912 | if (volume_info->username) { |
1913 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
1914 | if (!ses->user_name) | |
1915 | goto get_ses_fail; | |
1916 | } | |
36988c76 JL |
1917 | |
1918 | /* volume_info->password freed at unmount */ | |
1919 | if (volume_info->password) { | |
1920 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1921 | if (!ses->password) | |
1922 | goto get_ses_fail; | |
1923 | } | |
1924 | if (volume_info->domainname) { | |
d3686d54 SP |
1925 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
1926 | if (!ses->domainName) | |
1927 | goto get_ses_fail; | |
36988c76 | 1928 | } |
3e4b3e1f | 1929 | ses->cred_uid = volume_info->cred_uid; |
36988c76 JL |
1930 | ses->linux_uid = volume_info->linux_uid; |
1931 | ses->overrideSecFlg = volume_info->secFlg; | |
1932 | ||
1933 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
1934 | rc = cifs_negotiate_protocol(xid, ses); |
1935 | if (!rc) | |
1936 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 1937 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 1938 | if (rc) |
36988c76 JL |
1939 | goto get_ses_fail; |
1940 | ||
1941 | /* success, put it on the list */ | |
3f9bcca7 | 1942 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 1943 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 1944 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
1945 | |
1946 | FreeXid(xid); | |
1947 | return ses; | |
1948 | ||
1949 | get_ses_fail: | |
1950 | sesInfoFree(ses); | |
1951 | FreeXid(xid); | |
1952 | return ERR_PTR(rc); | |
1953 | } | |
1954 | ||
f1987b44 JL |
1955 | static struct cifsTconInfo * |
1956 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
1957 | { | |
1958 | struct list_head *tmp; | |
1959 | struct cifsTconInfo *tcon; | |
1960 | ||
3f9bcca7 | 1961 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1962 | list_for_each(tmp, &ses->tcon_list) { |
1963 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
1964 | if (tcon->tidStatus == CifsExiting) | |
1965 | continue; | |
1966 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
dea570e0 SF |
1967 | continue; |
1968 | ||
f1987b44 | 1969 | ++tcon->tc_count; |
3f9bcca7 | 1970 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1971 | return tcon; |
1da177e4 | 1972 | } |
3f9bcca7 | 1973 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1974 | return NULL; |
1975 | } | |
1976 | ||
f1987b44 JL |
1977 | static void |
1978 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
1979 | { | |
1980 | int xid; | |
1981 | struct cifsSesInfo *ses = tcon->ses; | |
1982 | ||
d00c28de | 1983 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 1984 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 1985 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 1986 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1987 | return; |
1988 | } | |
1989 | ||
1990 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 1991 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1992 | |
1993 | xid = GetXid(); | |
1994 | CIFSSMBTDis(xid, tcon); | |
1995 | _FreeXid(xid); | |
1996 | ||
d03382ce | 1997 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 1998 | tconInfoFree(tcon); |
f1987b44 JL |
1999 | cifs_put_smb_ses(ses); |
2000 | } | |
2001 | ||
d00c28de JL |
2002 | static struct cifsTconInfo * |
2003 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
2004 | { | |
2005 | int rc, xid; | |
2006 | struct cifsTconInfo *tcon; | |
2007 | ||
2008 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2009 | if (tcon) { | |
2010 | cFYI(1, "Found match on UNC path"); | |
2011 | /* existing tcon already has a reference */ | |
2012 | cifs_put_smb_ses(ses); | |
2013 | if (tcon->seal != volume_info->seal) | |
2014 | cERROR(1, "transport encryption setting " | |
2015 | "conflicts with existing tid"); | |
2016 | return tcon; | |
2017 | } | |
2018 | ||
2019 | tcon = tconInfoAlloc(); | |
2020 | if (tcon == NULL) { | |
2021 | rc = -ENOMEM; | |
2022 | goto out_fail; | |
2023 | } | |
2024 | ||
2025 | tcon->ses = ses; | |
2026 | if (volume_info->password) { | |
2027 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2028 | if (!tcon->password) { | |
2029 | rc = -ENOMEM; | |
2030 | goto out_fail; | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2035 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2036 | cERROR(1, "Missing share name"); | |
2037 | rc = -ENODEV; | |
2038 | goto out_fail; | |
2039 | } | |
2040 | ||
2041 | /* BB Do we need to wrap session_mutex around | |
2042 | * this TCon call and Unix SetFS as | |
2043 | * we do on SessSetup and reconnect? */ | |
2044 | xid = GetXid(); | |
2045 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2046 | FreeXid(xid); | |
2047 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2048 | if (rc) | |
2049 | goto out_fail; | |
2050 | ||
2051 | if (volume_info->nodfs) { | |
2052 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2053 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2054 | } | |
2055 | tcon->seal = volume_info->seal; | |
2056 | /* we can have only one retry value for a connection | |
2057 | to a share so for resources mounted more than once | |
2058 | to the same server share the last value passed in | |
2059 | for the retry flag is used */ | |
2060 | tcon->retry = volume_info->retry; | |
2061 | tcon->nocase = volume_info->nocase; | |
2062 | tcon->local_lease = volume_info->local_lease; | |
2063 | ||
3f9bcca7 | 2064 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2065 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2066 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2067 | |
d03382ce SJ |
2068 | cifs_fscache_get_super_cookie(tcon); |
2069 | ||
d00c28de JL |
2070 | return tcon; |
2071 | ||
2072 | out_fail: | |
2073 | tconInfoFree(tcon); | |
2074 | return ERR_PTR(rc); | |
2075 | } | |
2076 | ||
9d002df4 JL |
2077 | void |
2078 | cifs_put_tlink(struct tcon_link *tlink) | |
2079 | { | |
2080 | if (!tlink || IS_ERR(tlink)) | |
2081 | return; | |
2082 | ||
2083 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2084 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2085 | tlink->tl_time = jiffies; | |
2086 | return; | |
2087 | } | |
2088 | ||
2089 | if (!IS_ERR(tlink_tcon(tlink))) | |
2090 | cifs_put_tcon(tlink_tcon(tlink)); | |
2091 | kfree(tlink); | |
2092 | return; | |
2093 | } | |
d00c28de | 2094 | |
1da177e4 | 2095 | int |
50c2f753 SF |
2096 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
2097 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 2098 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2099 | { |
2100 | char *temp_unc; | |
2101 | int rc = 0; | |
2102 | ||
2103 | *pnum_referrals = 0; | |
366781c1 | 2104 | *preferrals = NULL; |
1da177e4 LT |
2105 | |
2106 | if (pSesInfo->ipc_tid == 0) { | |
2107 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2108 | strnlen(pSesInfo->serverName, |
2109 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2110 | + 1 + 4 /* slash IPC$ */ + 2, |
2111 | GFP_KERNEL); | |
2112 | if (temp_unc == NULL) | |
2113 | return -ENOMEM; | |
2114 | temp_unc[0] = '\\'; | |
2115 | temp_unc[1] = '\\'; | |
2116 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2117 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2118 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2119 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2120 | kfree(temp_unc); |
2121 | } | |
2122 | if (rc == 0) | |
c2cf07d5 | 2123 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2124 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2125 | /* BB map targetUNCs to dfs_info3 structures, here or |
2126 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2127 | |
2128 | return rc; | |
2129 | } | |
2130 | ||
09e50d55 JL |
2131 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2132 | static struct lock_class_key cifs_key[2]; | |
2133 | static struct lock_class_key cifs_slock_key[2]; | |
2134 | ||
2135 | static inline void | |
2136 | cifs_reclassify_socket4(struct socket *sock) | |
2137 | { | |
2138 | struct sock *sk = sock->sk; | |
2139 | BUG_ON(sock_owned_by_user(sk)); | |
2140 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2141 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2142 | } | |
2143 | ||
2144 | static inline void | |
2145 | cifs_reclassify_socket6(struct socket *sock) | |
2146 | { | |
2147 | struct sock *sk = sock->sk; | |
2148 | BUG_ON(sock_owned_by_user(sk)); | |
2149 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2150 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2151 | } | |
2152 | #else | |
2153 | static inline void | |
2154 | cifs_reclassify_socket4(struct socket *sock) | |
2155 | { | |
2156 | } | |
2157 | ||
2158 | static inline void | |
2159 | cifs_reclassify_socket6(struct socket *sock) | |
2160 | { | |
2161 | } | |
2162 | #endif | |
2163 | ||
1da177e4 | 2164 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2165 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2166 | { |
50c2f753 | 2167 | unsigned int i, j; |
1da177e4 | 2168 | |
50c2f753 | 2169 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2170 | /* mask a nibble at a time and encode */ |
2171 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2172 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2173 | j += 2; |
1da177e4 LT |
2174 | } |
2175 | ||
2176 | } | |
2177 | ||
3eb9a889 BG |
2178 | static int |
2179 | bind_socket(struct TCP_Server_Info *server) | |
2180 | { | |
2181 | int rc = 0; | |
2182 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2183 | /* Bind to the specified local IP address */ | |
2184 | struct socket *socket = server->ssocket; | |
2185 | rc = socket->ops->bind(socket, | |
2186 | (struct sockaddr *) &server->srcaddr, | |
2187 | sizeof(server->srcaddr)); | |
2188 | if (rc < 0) { | |
2189 | struct sockaddr_in *saddr4; | |
2190 | struct sockaddr_in6 *saddr6; | |
2191 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2192 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2193 | if (saddr6->sin6_family == AF_INET6) | |
2194 | cERROR(1, "cifs: " | |
2195 | "Failed to bind to: %pI6c, error: %d\n", | |
2196 | &saddr6->sin6_addr, rc); | |
2197 | else | |
2198 | cERROR(1, "cifs: " | |
2199 | "Failed to bind to: %pI4, error: %d\n", | |
2200 | &saddr4->sin_addr.s_addr, rc); | |
2201 | } | |
2202 | } | |
2203 | return rc; | |
2204 | } | |
1da177e4 LT |
2205 | |
2206 | static int | |
a9f1b85e | 2207 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2208 | { |
2209 | int rc = 0; | |
a9f1b85e PS |
2210 | /* |
2211 | * some servers require RFC1001 sessinit before sending | |
2212 | * negprot - BB check reconnection in case where second | |
2213 | * sessinit is sent but no second negprot | |
2214 | */ | |
2215 | struct rfc1002_session_packet *ses_init_buf; | |
2216 | struct smb_hdr *smb_buf; | |
2217 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2218 | GFP_KERNEL); | |
2219 | if (ses_init_buf) { | |
2220 | ses_init_buf->trailer.session_req.called_len = 32; | |
2221 | ||
2222 | if (server->server_RFC1001_name && | |
2223 | server->server_RFC1001_name[0] != 0) | |
2224 | rfc1002mangle(ses_init_buf->trailer. | |
2225 | session_req.called_name, | |
2226 | server->server_RFC1001_name, | |
2227 | RFC1001_NAME_LEN_WITH_NULL); | |
2228 | else | |
2229 | rfc1002mangle(ses_init_buf->trailer. | |
2230 | session_req.called_name, | |
2231 | DEFAULT_CIFS_CALLED_NAME, | |
2232 | RFC1001_NAME_LEN_WITH_NULL); | |
2233 | ||
2234 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2235 | ||
2236 | /* | |
2237 | * calling name ends in null (byte 16) from old smb | |
2238 | * convention. | |
2239 | */ | |
2240 | if (server->workstation_RFC1001_name && | |
2241 | server->workstation_RFC1001_name[0] != 0) | |
2242 | rfc1002mangle(ses_init_buf->trailer. | |
2243 | session_req.calling_name, | |
2244 | server->workstation_RFC1001_name, | |
2245 | RFC1001_NAME_LEN_WITH_NULL); | |
2246 | else | |
2247 | rfc1002mangle(ses_init_buf->trailer. | |
2248 | session_req.calling_name, | |
2249 | "LINUX_CIFS_CLNT", | |
2250 | RFC1001_NAME_LEN_WITH_NULL); | |
2251 | ||
2252 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2253 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2254 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2255 | ||
2256 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
2257 | smb_buf->smb_buf_length = 0x81000044; | |
2258 | rc = smb_send(server, smb_buf, 0x44); | |
2259 | kfree(ses_init_buf); | |
2260 | /* | |
2261 | * RFC1001 layer in at least one server | |
2262 | * requires very short break before negprot | |
2263 | * presumably because not expecting negprot | |
2264 | * to follow so fast. This is a simple | |
2265 | * solution that works without | |
2266 | * complicating the code and causes no | |
2267 | * significant slowing down on mount | |
2268 | * for everyone else | |
2269 | */ | |
2270 | usleep_range(1000, 2000); | |
2271 | } | |
2272 | /* | |
2273 | * else the negprot may still work without this | |
2274 | * even though malloc failed | |
2275 | */ | |
2276 | ||
2277 | return rc; | |
2278 | } | |
2279 | ||
2280 | static int | |
2281 | generic_ip_connect(struct TCP_Server_Info *server) | |
2282 | { | |
2283 | int rc = 0; | |
6da97910 | 2284 | __be16 sport; |
a9f1b85e | 2285 | int slen, sfamily; |
bcf4b106 | 2286 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2287 | struct sockaddr *saddr; |
2288 | ||
2289 | saddr = (struct sockaddr *) &server->dstaddr; | |
2290 | ||
2291 | if (server->dstaddr.ss_family == AF_INET6) { | |
2292 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2293 | slen = sizeof(struct sockaddr_in6); | |
2294 | sfamily = AF_INET6; | |
2295 | } else { | |
2296 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2297 | slen = sizeof(struct sockaddr_in); | |
2298 | sfamily = AF_INET; | |
2299 | } | |
1da177e4 | 2300 | |
bcf4b106 | 2301 | if (socket == NULL) { |
f1d0c998 RL |
2302 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2303 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2304 | if (rc < 0) { |
b6b38f70 | 2305 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2306 | server->ssocket = NULL; |
1da177e4 | 2307 | return rc; |
1da177e4 | 2308 | } |
bcf4b106 JL |
2309 | |
2310 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2311 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2312 | server->ssocket = socket; |
2313 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2314 | if (sfamily == AF_INET6) |
2315 | cifs_reclassify_socket6(socket); | |
2316 | else | |
2317 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2318 | } |
2319 | ||
3eb9a889 BG |
2320 | rc = bind_socket(server); |
2321 | if (rc < 0) | |
2322 | return rc; | |
2323 | ||
a9f1b85e PS |
2324 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2325 | if (rc < 0) { | |
2326 | cFYI(1, "Error %d connecting to server", rc); | |
bcf4b106 JL |
2327 | sock_release(socket); |
2328 | server->ssocket = NULL; | |
1da177e4 LT |
2329 | return rc; |
2330 | } | |
bcf4b106 | 2331 | |
bcf4b106 JL |
2332 | /* |
2333 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2334 | * the default. sock_setsockopt not used because it expects |
2335 | * user space buffer | |
bcf4b106 JL |
2336 | */ |
2337 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2338 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2339 | |
b387eaeb | 2340 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2341 | if (server->noautotune) { |
2342 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2343 | socket->sk->sk_sndbuf = 200 * 1024; | |
2344 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2345 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2346 | } |
1da177e4 | 2347 | |
6a5fa236 | 2348 | if (server->tcp_nodelay) { |
a9f1b85e | 2349 | int val = 1; |
6a5fa236 SF |
2350 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2351 | (char *)&val, sizeof(val)); | |
2352 | if (rc) | |
b6b38f70 | 2353 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2354 | } |
2355 | ||
b6b38f70 | 2356 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2357 | socket->sk->sk_sndbuf, |
b6b38f70 | 2358 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2359 | |
a9f1b85e PS |
2360 | if (sport == htons(RFC1001_PORT)) |
2361 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2362 | |
1da177e4 LT |
2363 | return rc; |
2364 | } | |
2365 | ||
2366 | static int | |
a9f1b85e | 2367 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2368 | { |
6da97910 | 2369 | __be16 *sport; |
a9f1b85e PS |
2370 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2371 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2372 | |
a9f1b85e PS |
2373 | if (server->dstaddr.ss_family == AF_INET6) |
2374 | sport = &addr6->sin6_port; | |
2375 | else | |
2376 | sport = &addr->sin_port; | |
1da177e4 | 2377 | |
a9f1b85e PS |
2378 | if (*sport == 0) { |
2379 | int rc; | |
1da177e4 | 2380 | |
a9f1b85e PS |
2381 | /* try with 445 port at first */ |
2382 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2383 | |
a9f1b85e | 2384 | rc = generic_ip_connect(server); |
1da177e4 | 2385 | if (rc >= 0) |
a9f1b85e | 2386 | return rc; |
6a5fa236 | 2387 | |
a9f1b85e PS |
2388 | /* if it failed, try with 139 port */ |
2389 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2390 | } |
2391 | ||
a9f1b85e | 2392 | return generic_ip_connect(server); |
1da177e4 LT |
2393 | } |
2394 | ||
50c2f753 SF |
2395 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2396 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2397 | { |
2398 | /* if we are reconnecting then should we check to see if | |
2399 | * any requested capabilities changed locally e.g. via | |
2400 | * remount but we can not do much about it here | |
2401 | * if they have (even if we could detect it by the following) | |
2402 | * Perhaps we could add a backpointer to array of sb from tcon | |
2403 | * or if we change to make all sb to same share the same | |
2404 | * sb as NFS - then we only have one backpointer to sb. | |
2405 | * What if we wanted to mount the server share twice once with | |
2406 | * and once without posixacls or posix paths? */ | |
2407 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2408 | |
c18c842b SF |
2409 | if (vol_info && vol_info->no_linux_ext) { |
2410 | tcon->fsUnixInfo.Capability = 0; | |
2411 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2412 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2413 | return; |
2414 | } else if (vol_info) | |
2415 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2416 | ||
2417 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2418 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2419 | return; |
2420 | } | |
50c2f753 | 2421 | |
fb8c4b14 | 2422 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2423 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
50c2f753 | 2424 | |
8af18971 SF |
2425 | /* check for reconnect case in which we do not |
2426 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2427 | if (vol_info == NULL) { |
50c2f753 | 2428 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2429 | originally at mount time */ |
2430 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2431 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2432 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2433 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2434 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2435 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2436 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2437 | cERROR(1, "possible reconnect error"); |
2438 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2439 | } |
8af18971 | 2440 | } |
50c2f753 | 2441 | |
8af18971 | 2442 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2443 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2444 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2445 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2446 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2447 | if (sb) |
8af18971 SF |
2448 | sb->s_flags |= MS_POSIXACL; |
2449 | } | |
2450 | ||
75865f8c | 2451 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2452 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2453 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2454 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2455 | if (sb) |
50c2f753 | 2456 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2457 | CIFS_MOUNT_POSIX_PATHS; |
2458 | } | |
50c2f753 | 2459 | |
984acfe1 SF |
2460 | /* We might be setting the path sep back to a different |
2461 | form if we are reconnecting and the server switched its | |
50c2f753 | 2462 | posix path capability for this share */ |
75865f8c | 2463 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2464 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2465 | |
2466 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2467 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2468 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2469 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2470 | } |
2471 | } | |
50c2f753 SF |
2472 | |
2473 | ||
b6b38f70 | 2474 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2475 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2476 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2477 | cFYI(1, "FCNTL cap"); |
75865f8c | 2478 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2479 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2480 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2481 | cFYI(1, "POSIX path cap"); |
75865f8c | 2482 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2483 | cFYI(1, "XATTR cap"); |
75865f8c | 2484 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2485 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2486 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2487 | cFYI(1, "very large read cap"); |
75865f8c | 2488 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2489 | cFYI(1, "very large write cap"); |
8af18971 SF |
2490 | #endif /* CIFS_DEBUG2 */ |
2491 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2492 | if (vol_info == NULL) { |
b6b38f70 | 2493 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2494 | } else |
b6b38f70 | 2495 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2496 | "with the server failed. Consider " |
2497 | "mounting with the Unix Extensions\n" | |
2498 | "disabled, if problems are found, " | |
2499 | "by specifying the nounix mount " | |
b6b38f70 | 2500 | "option."); |
5a44b319 | 2501 | |
8af18971 SF |
2502 | } |
2503 | } | |
2504 | } | |
2505 | ||
03a143c9 SF |
2506 | static void |
2507 | convert_delimiter(char *path, char delim) | |
2508 | { | |
2509 | int i; | |
c2d68ea6 | 2510 | char old_delim; |
03a143c9 SF |
2511 | |
2512 | if (path == NULL) | |
2513 | return; | |
2514 | ||
582d21e5 | 2515 | if (delim == '/') |
c2d68ea6 SF |
2516 | old_delim = '\\'; |
2517 | else | |
2518 | old_delim = '/'; | |
2519 | ||
03a143c9 | 2520 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2521 | if (path[i] == old_delim) |
03a143c9 SF |
2522 | path[i] = delim; |
2523 | } | |
2524 | } | |
2525 | ||
3b795210 SF |
2526 | static void setup_cifs_sb(struct smb_vol *pvolume_info, |
2527 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2528 | { |
2de970ff JL |
2529 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2530 | ||
3b795210 | 2531 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2532 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2533 | pvolume_info->rsize); | |
3b795210 SF |
2534 | cifs_sb->rsize = CIFSMaxBufSize; |
2535 | } else if ((pvolume_info->rsize) && | |
2536 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2537 | cifs_sb->rsize = pvolume_info->rsize; | |
2538 | else /* default */ | |
2539 | cifs_sb->rsize = CIFSMaxBufSize; | |
2540 | ||
2541 | if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) { | |
b6b38f70 JP |
2542 | cERROR(1, "wsize %d too large, using 4096 instead", |
2543 | pvolume_info->wsize); | |
3b795210 SF |
2544 | cifs_sb->wsize = 4096; |
2545 | } else if (pvolume_info->wsize) | |
2546 | cifs_sb->wsize = pvolume_info->wsize; | |
2547 | else | |
2548 | cifs_sb->wsize = min_t(const int, | |
2549 | PAGEVEC_SIZE * PAGE_CACHE_SIZE, | |
2550 | 127*1024); | |
2551 | /* old default of CIFSMaxBufSize was too small now | |
2552 | that SMB Write2 can send multiple pages in kvec. | |
2553 | RFC1001 does not describe what happens when frame | |
2554 | bigger than 128K is sent so use that as max in | |
2555 | conjunction with 52K kvec constraint on arch with 4K | |
2556 | page size */ | |
2557 | ||
2558 | if (cifs_sb->rsize < 2048) { | |
2559 | cifs_sb->rsize = 2048; | |
2560 | /* Windows ME may prefer this */ | |
b6b38f70 | 2561 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2562 | } |
2563 | /* calculate prepath */ | |
2564 | cifs_sb->prepath = pvolume_info->prepath; | |
2565 | if (cifs_sb->prepath) { | |
2566 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2567 | /* we can not convert the / to \ in the path | |
2568 | separators in the prefixpath yet because we do not | |
2569 | know (until reset_cifs_unix_caps is called later) | |
2570 | whether POSIX PATH CAP is available. We normalize | |
2571 | the / to \ after reset_cifs_unix_caps is called */ | |
2572 | pvolume_info->prepath = NULL; | |
2573 | } else | |
2574 | cifs_sb->prepathlen = 0; | |
2575 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2576 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2577 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2578 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2579 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2580 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2581 | |
6d20e840 SJ |
2582 | cifs_sb->actimeo = pvolume_info->actimeo; |
2583 | ||
3b795210 SF |
2584 | if (pvolume_info->noperm) |
2585 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2586 | if (pvolume_info->setuids) | |
2587 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2588 | if (pvolume_info->server_ino) | |
2589 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2590 | if (pvolume_info->remap) | |
2591 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2592 | if (pvolume_info->no_xattr) | |
2593 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2594 | if (pvolume_info->sfu_emul) | |
2595 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2596 | if (pvolume_info->nobrl) | |
2597 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2598 | if (pvolume_info->nostrictsync) |
4717bed6 | 2599 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2600 | if (pvolume_info->mand_lock) |
2601 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2602 | if (pvolume_info->cifs_acl) |
2603 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2604 | if (pvolume_info->override_uid) | |
2605 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2606 | if (pvolume_info->override_gid) | |
2607 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2608 | if (pvolume_info->dynperm) | |
2609 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2610 | if (pvolume_info->fsc) |
2611 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2612 | if (pvolume_info->multiuser) |
2613 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2614 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
2615 | if (pvolume_info->strict_io) |
2616 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 2617 | if (pvolume_info->direct_io) { |
b6b38f70 | 2618 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2619 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2620 | } | |
736a3320 SM |
2621 | if (pvolume_info->mfsymlinks) { |
2622 | if (pvolume_info->sfu_emul) { | |
2623 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2624 | "mount option is used"); | |
2625 | } else { | |
2626 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2627 | } | |
2628 | } | |
3b795210 SF |
2629 | |
2630 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2631 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2632 | "mount option supported"); | |
b1c8d2b4 JL |
2633 | } |
2634 | ||
e4cce94c IM |
2635 | static int |
2636 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2637 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2638 | { | |
2639 | int rc; | |
e4cce94c IM |
2640 | FILE_ALL_INFO *pfile_info; |
2641 | ||
e4cce94c IM |
2642 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2643 | if (pfile_info == NULL) | |
2644 | return -ENOMEM; | |
2645 | ||
2646 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2647 | 0 /* not legacy */, cifs_sb->local_nls, | |
2648 | cifs_sb->mnt_cifs_flags & | |
2649 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2650 | kfree(pfile_info); | |
2651 | return rc; | |
2652 | } | |
2653 | ||
1bfe73c2 IM |
2654 | static void |
2655 | cleanup_volume_info(struct smb_vol **pvolume_info) | |
2656 | { | |
2657 | struct smb_vol *volume_info; | |
2658 | ||
ad6cca6d | 2659 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2660 | return; |
2661 | ||
2662 | volume_info = *pvolume_info; | |
2663 | kzfree(volume_info->password); | |
2664 | kfree(volume_info->UNC); | |
2665 | kfree(volume_info->prepath); | |
2666 | kfree(volume_info); | |
2667 | *pvolume_info = NULL; | |
2668 | return; | |
2669 | } | |
2670 | ||
2d6d589d | 2671 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2672 | /* build_path_to_root returns full path to root when |
2673 | * we do not have an exiting connection (tcon) */ | |
2674 | static char * | |
2675 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2676 | const struct cifs_sb_info *cifs_sb) | |
2677 | { | |
2678 | char *full_path; | |
2679 | ||
2680 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2681 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2682 | if (full_path == NULL) | |
2683 | return ERR_PTR(-ENOMEM); | |
2684 | ||
2685 | strncpy(full_path, volume_info->UNC, unc_len); | |
2686 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2687 | int i; | |
2688 | for (i = 0; i < unc_len; i++) { | |
2689 | if (full_path[i] == '\\') | |
2690 | full_path[i] = '/'; | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | if (cifs_sb->prepathlen) | |
2695 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2696 | cifs_sb->prepathlen); | |
2697 | ||
2698 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2699 | return full_path; | |
2700 | } | |
2d6d589d | 2701 | #endif |
1bfe73c2 | 2702 | |
1da177e4 LT |
2703 | int |
2704 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
1bfe73c2 | 2705 | char *mount_data_global, const char *devname) |
1da177e4 | 2706 | { |
a2934c7b | 2707 | int rc; |
1da177e4 | 2708 | int xid; |
7586b765 | 2709 | struct smb_vol *volume_info; |
a2934c7b JL |
2710 | struct cifsSesInfo *pSesInfo; |
2711 | struct cifsTconInfo *tcon; | |
2712 | struct TCP_Server_Info *srvTcp; | |
e4cce94c | 2713 | char *full_path; |
2d6d589d | 2714 | char *mount_data = mount_data_global; |
9d002df4 | 2715 | struct tcon_link *tlink; |
2d6d589d | 2716 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2717 | struct dfs_info3_param *referrals = NULL; |
2718 | unsigned int num_referrals = 0; | |
5c2503a8 | 2719 | int referral_walks_count = 0; |
1bfe73c2 | 2720 | try_mount_again: |
2d6d589d | 2721 | #endif |
a2934c7b JL |
2722 | rc = 0; |
2723 | tcon = NULL; | |
2724 | pSesInfo = NULL; | |
2725 | srvTcp = NULL; | |
1bfe73c2 | 2726 | full_path = NULL; |
9d002df4 | 2727 | tlink = NULL; |
1da177e4 LT |
2728 | |
2729 | xid = GetXid(); | |
2730 | ||
7586b765 JL |
2731 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2732 | if (!volume_info) { | |
2733 | rc = -ENOMEM; | |
2734 | goto out; | |
2735 | } | |
50c2f753 | 2736 | |
7586b765 | 2737 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) { |
70fe7dc0 JL |
2738 | rc = -EINVAL; |
2739 | goto out; | |
1da177e4 LT |
2740 | } |
2741 | ||
7586b765 | 2742 | if (volume_info->nullauth) { |
b6b38f70 | 2743 | cFYI(1, "null user"); |
7586b765 JL |
2744 | volume_info->username = ""; |
2745 | } else if (volume_info->username) { | |
1da177e4 | 2746 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2747 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2748 | } else { |
bf820679 | 2749 | cifserror("No username specified"); |
50c2f753 SF |
2750 | /* In userspace mount helper we can get user name from alternate |
2751 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2752 | rc = -EINVAL; |
2753 | goto out; | |
1da177e4 LT |
2754 | } |
2755 | ||
1da177e4 | 2756 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2757 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2758 | /* load_nls_default cannot return null */ |
2759 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2760 | } else { |
a5fc4ce0 JL |
2761 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2762 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2763 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2764 | volume_info->iocharset); | |
70fe7dc0 JL |
2765 | rc = -ELIBACC; |
2766 | goto out; | |
1da177e4 LT |
2767 | } |
2768 | } | |
a5fc4ce0 | 2769 | cifs_sb->local_nls = volume_info->local_nls; |
1da177e4 | 2770 | |
63c038c2 | 2771 | /* get a reference to a tcp session */ |
7586b765 | 2772 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
2773 | if (IS_ERR(srvTcp)) { |
2774 | rc = PTR_ERR(srvTcp); | |
2775 | goto out; | |
1da177e4 LT |
2776 | } |
2777 | ||
36988c76 JL |
2778 | /* get a reference to a SMB session */ |
2779 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
2780 | if (IS_ERR(pSesInfo)) { | |
2781 | rc = PTR_ERR(pSesInfo); | |
2782 | pSesInfo = NULL; | |
2783 | goto mount_fail_check; | |
1da177e4 | 2784 | } |
50c2f753 | 2785 | |
d00c28de JL |
2786 | setup_cifs_sb(volume_info, cifs_sb); |
2787 | if (pSesInfo->capabilities & CAP_LARGE_FILES) | |
2788 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2789 | else | |
2790 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 2791 | |
8af18971 | 2792 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
2793 | sb->s_time_gran = 100; |
2794 | ||
d00c28de JL |
2795 | /* search for existing tcon to this server share */ |
2796 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
2797 | if (IS_ERR(tcon)) { | |
2798 | rc = PTR_ERR(tcon); | |
2799 | tcon = NULL; | |
1bfe73c2 | 2800 | goto remote_path_check; |
d00c28de | 2801 | } |
1bfe73c2 | 2802 | |
d82c2df5 SF |
2803 | /* do not care if following two calls succeed - informational */ |
2804 | if (!tcon->ipc) { | |
2805 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
2806 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
2807 | } | |
03a143c9 | 2808 | |
d82c2df5 SF |
2809 | /* tell server which Unix caps we support */ |
2810 | if (tcon->ses->capabilities & CAP_UNIX) | |
2811 | /* reset of caps checks mount to see if unix extensions | |
2812 | disabled for just this mount */ | |
7586b765 | 2813 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
d82c2df5 SF |
2814 | else |
2815 | tcon->unix_ext = 0; /* server does not support them */ | |
c18c842b | 2816 | |
d82c2df5 SF |
2817 | /* convert forward to back slashes in prepath here if needed */ |
2818 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2819 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 2820 | |
d82c2df5 SF |
2821 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
2822 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 2823 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 2824 | } |
d82c2df5 SF |
2825 | if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X)) |
2826 | cifs_sb->wsize = min(cifs_sb->wsize, | |
2827 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
2828 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) | |
2829 | cifs_sb->rsize = min(cifs_sb->rsize, | |
2830 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 2831 | |
1bfe73c2 IM |
2832 | remote_path_check: |
2833 | /* check if a whole path (including prepath) is not remote */ | |
2834 | if (!rc && cifs_sb->prepathlen && tcon) { | |
e4cce94c | 2835 | /* build_path_to_root works only when we have a valid tcon */ |
7d161b7f | 2836 | full_path = cifs_build_path_to_root(cifs_sb, tcon); |
e4cce94c IM |
2837 | if (full_path == NULL) { |
2838 | rc = -ENOMEM; | |
2839 | goto mount_fail_check; | |
2840 | } | |
2841 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 2842 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
2843 | kfree(full_path); |
2844 | goto mount_fail_check; | |
2845 | } | |
2846 | kfree(full_path); | |
2847 | } | |
2848 | ||
1bfe73c2 IM |
2849 | /* get referral if needed */ |
2850 | if (rc == -EREMOTE) { | |
d036f50f | 2851 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
2852 | if (referral_walks_count > MAX_NESTED_LINKS) { |
2853 | /* | |
2854 | * BB: when we implement proper loop detection, | |
2855 | * we will remove this check. But now we need it | |
2856 | * to prevent an indefinite loop if 'DFS tree' is | |
2857 | * misconfigured (i.e. has loops). | |
2858 | */ | |
2859 | rc = -ELOOP; | |
2860 | goto mount_fail_check; | |
2861 | } | |
1bfe73c2 IM |
2862 | /* convert forward to back slashes in prepath here if needed */ |
2863 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2864 | convert_delimiter(cifs_sb->prepath, | |
2865 | CIFS_DIR_SEP(cifs_sb)); | |
2866 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2867 | if (IS_ERR(full_path)) { | |
2868 | rc = PTR_ERR(full_path); | |
2869 | goto mount_fail_check; | |
2870 | } | |
2871 | ||
b6b38f70 | 2872 | cFYI(1, "Getting referral for: %s", full_path); |
1bfe73c2 IM |
2873 | rc = get_dfs_path(xid, pSesInfo , full_path + 1, |
2874 | cifs_sb->local_nls, &num_referrals, &referrals, | |
2875 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2876 | if (!rc && num_referrals > 0) { | |
2877 | char *fake_devname = NULL; | |
2878 | ||
2879 | if (mount_data != mount_data_global) | |
2880 | kfree(mount_data); | |
7b91e266 | 2881 | |
1bfe73c2 IM |
2882 | mount_data = cifs_compose_mount_options( |
2883 | cifs_sb->mountdata, full_path + 1, | |
2884 | referrals, &fake_devname); | |
7b91e266 | 2885 | |
1bfe73c2 | 2886 | free_dfs_info_array(referrals, num_referrals); |
7b91e266 JL |
2887 | kfree(fake_devname); |
2888 | kfree(full_path); | |
2889 | ||
2890 | if (IS_ERR(mount_data)) { | |
2891 | rc = PTR_ERR(mount_data); | |
2892 | mount_data = NULL; | |
2893 | goto mount_fail_check; | |
2894 | } | |
1bfe73c2 IM |
2895 | |
2896 | if (tcon) | |
2897 | cifs_put_tcon(tcon); | |
2898 | else if (pSesInfo) | |
2899 | cifs_put_smb_ses(pSesInfo); | |
2900 | ||
2901 | cleanup_volume_info(&volume_info); | |
5c2503a8 | 2902 | referral_walks_count++; |
a2934c7b | 2903 | FreeXid(xid); |
1bfe73c2 IM |
2904 | goto try_mount_again; |
2905 | } | |
d036f50f SF |
2906 | #else /* No DFS support, return error on mount */ |
2907 | rc = -EOPNOTSUPP; | |
2908 | #endif | |
1bfe73c2 IM |
2909 | } |
2910 | ||
9d002df4 JL |
2911 | if (rc) |
2912 | goto mount_fail_check; | |
2913 | ||
2914 | /* now, hang the tcon off of the superblock */ | |
2915 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
2916 | if (tlink == NULL) { | |
2917 | rc = -ENOMEM; | |
2918 | goto mount_fail_check; | |
2919 | } | |
2920 | ||
b647c35f | 2921 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
2922 | tlink->tl_tcon = tcon; |
2923 | tlink->tl_time = jiffies; | |
2924 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
2925 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
2926 | ||
b647c35f | 2927 | cifs_sb->master_tlink = tlink; |
9d002df4 | 2928 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 2929 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 2930 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 2931 | |
2de970ff JL |
2932 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
2933 | TLINK_IDLE_EXPIRE); | |
2934 | ||
1bfe73c2 IM |
2935 | mount_fail_check: |
2936 | /* on error free sesinfo and tcon struct if needed */ | |
2937 | if (rc) { | |
2938 | if (mount_data != mount_data_global) | |
2939 | kfree(mount_data); | |
2940 | /* If find_unc succeeded then rc == 0 so we can not end */ | |
25985edc | 2941 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
2942 | if (tcon) |
2943 | cifs_put_tcon(tcon); | |
2944 | else if (pSesInfo) | |
2945 | cifs_put_smb_ses(pSesInfo); | |
2946 | else | |
2947 | cifs_put_tcp_session(srvTcp); | |
2948 | goto out; | |
2949 | } | |
2950 | ||
7586b765 | 2951 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
2952 | (in which case it is not needed anymore) but when new sesion is created |
2953 | the password ptr is put in the new session structure (in which case the | |
2954 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
2955 | out: |
2956 | /* zero out password before freeing */ | |
1bfe73c2 | 2957 | cleanup_volume_info(&volume_info); |
1da177e4 LT |
2958 | FreeXid(xid); |
2959 | return rc; | |
2960 | } | |
2961 | ||
1da177e4 LT |
2962 | int |
2963 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
2964 | const char *tree, struct cifsTconInfo *tcon, | |
2965 | const struct nls_table *nls_codepage) | |
2966 | { | |
2967 | struct smb_hdr *smb_buffer; | |
2968 | struct smb_hdr *smb_buffer_response; | |
2969 | TCONX_REQ *pSMB; | |
2970 | TCONX_RSP *pSMBr; | |
2971 | unsigned char *bcc_ptr; | |
2972 | int rc = 0; | |
690c522f JL |
2973 | int length; |
2974 | __u16 bytes_left, count; | |
1da177e4 LT |
2975 | |
2976 | if (ses == NULL) | |
2977 | return -EIO; | |
2978 | ||
2979 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 2980 | if (smb_buffer == NULL) |
1da177e4 | 2981 | return -ENOMEM; |
ca43e3be | 2982 | |
1da177e4 LT |
2983 | smb_buffer_response = smb_buffer; |
2984 | ||
2985 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
2986 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
2987 | |
2988 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
2989 | smb_buffer->Uid = ses->Suid; |
2990 | pSMB = (TCONX_REQ *) smb_buffer; | |
2991 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
2992 | ||
2993 | pSMB->AndXCommand = 0xFF; | |
2994 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 2995 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 2996 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 2997 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 2998 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 2999 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3000 | /* already aligned so no need to do it below */ |
eeac8047 | 3001 | } else { |
540b2e37 | 3002 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3003 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3004 | specified as required (when that support is added to | |
3005 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3006 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3007 | by Samba (not sure whether other servers allow |
3008 | NTLMv2 password here) */ | |
7c7b25bc | 3009 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3010 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3011 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3012 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
4e53a3fb JL |
3013 | ses->server->secMode & |
3014 | SECMODE_PW_ENCRYPT ? true : false, | |
3015 | bcc_ptr); | |
7c7b25bc SF |
3016 | else |
3017 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 SP |
3018 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
3019 | bcc_ptr); | |
eeac8047 | 3020 | |
540b2e37 | 3021 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3022 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3023 | /* must align unicode strings */ |
3024 | *bcc_ptr = 0; /* null byte password */ | |
3025 | bcc_ptr++; | |
3026 | } | |
eeac8047 | 3027 | } |
1da177e4 | 3028 | |
50c2f753 | 3029 | if (ses->server->secMode & |
a878fb22 | 3030 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3031 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3032 | ||
3033 | if (ses->capabilities & CAP_STATUS32) { | |
3034 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3035 | } | |
3036 | if (ses->capabilities & CAP_DFS) { | |
3037 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3038 | } | |
3039 | if (ses->capabilities & CAP_UNICODE) { | |
3040 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3041 | length = | |
50c2f753 SF |
3042 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3043 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3044 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3045 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3046 | bcc_ptr += 2; /* skip trailing null */ |
3047 | } else { /* ASCII */ | |
1da177e4 LT |
3048 | strcpy(bcc_ptr, tree); |
3049 | bcc_ptr += strlen(tree) + 1; | |
3050 | } | |
3051 | strcpy(bcc_ptr, "?????"); | |
3052 | bcc_ptr += strlen("?????"); | |
3053 | bcc_ptr += 1; | |
3054 | count = bcc_ptr - &pSMB->Password[0]; | |
3055 | pSMB->hdr.smb_buf_length += count; | |
3056 | pSMB->ByteCount = cpu_to_le16(count); | |
3057 | ||
133672ef | 3058 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3059 | 0); |
1da177e4 | 3060 | |
1da177e4 LT |
3061 | /* above now done in SendReceive */ |
3062 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3063 | bool is_unicode; |
3064 | ||
1da177e4 | 3065 | tcon->tidStatus = CifsGood; |
3b795210 | 3066 | tcon->need_reconnect = false; |
1da177e4 LT |
3067 | tcon->tid = smb_buffer_response->Tid; |
3068 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3069 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3070 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3071 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3072 | is_unicode = true; | |
3073 | else | |
3074 | is_unicode = false; | |
3075 | ||
cc20c031 | 3076 | |
50c2f753 | 3077 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3078 | if (length == 3) { |
3079 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3080 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3081 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3082 | tcon->ipc = 1; |
3083 | } | |
3084 | } else if (length == 2) { | |
3085 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3086 | /* the most common case */ | |
b6b38f70 | 3087 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3088 | } |
3089 | } | |
50c2f753 | 3090 | bcc_ptr += length + 1; |
cc20c031 | 3091 | bytes_left -= (length + 1); |
1da177e4 | 3092 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3093 | |
3094 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3095 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3096 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3097 | bytes_left, is_unicode, |
cc20c031 JL |
3098 | nls_codepage); |
3099 | ||
b6b38f70 | 3100 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3101 | |
fb8c4b14 | 3102 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3103 | (smb_buffer_response->WordCount == 7)) |
3104 | /* field is in same location */ | |
3979877e SF |
3105 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3106 | else | |
3107 | tcon->Flags = 0; | |
b6b38f70 | 3108 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3109 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3110 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3111 | ses->ipc_tid = smb_buffer_response->Tid; |
3112 | } | |
3113 | ||
a8a11d39 | 3114 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3115 | return rc; |
3116 | } | |
3117 | ||
3118 | int | |
3119 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
3120 | { | |
b647c35f JL |
3121 | struct rb_root *root = &cifs_sb->tlink_tree; |
3122 | struct rb_node *node; | |
3123 | struct tcon_link *tlink; | |
50c2f753 | 3124 | char *tmp; |
9d002df4 | 3125 | |
2de970ff JL |
3126 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3127 | ||
b647c35f JL |
3128 | spin_lock(&cifs_sb->tlink_tree_lock); |
3129 | while ((node = rb_first(root))) { | |
3130 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3131 | cifs_get_tlink(tlink); | |
3132 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3133 | rb_erase(node, root); | |
1da177e4 | 3134 | |
b647c35f JL |
3135 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3136 | cifs_put_tlink(tlink); | |
3137 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3138 | } | |
3139 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3140 | |
2fe87f02 SF |
3141 | tmp = cifs_sb->prepath; |
3142 | cifs_sb->prepathlen = 0; | |
3143 | cifs_sb->prepath = NULL; | |
3144 | kfree(tmp); | |
1da177e4 | 3145 | |
9d002df4 | 3146 | return 0; |
50c2f753 | 3147 | } |
1da177e4 | 3148 | |
198b5682 | 3149 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
3150 | { |
3151 | int rc = 0; | |
198b5682 | 3152 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3153 | |
198b5682 JL |
3154 | /* only send once per connect */ |
3155 | if (server->maxBuf != 0) | |
3156 | return 0; | |
3157 | ||
3158 | rc = CIFSSMBNegotiate(xid, ses); | |
3159 | if (rc == -EAGAIN) { | |
3160 | /* retry only once on 1st time connection */ | |
3161 | rc = CIFSSMBNegotiate(xid, ses); | |
3162 | if (rc == -EAGAIN) | |
3163 | rc = -EHOSTDOWN; | |
1da177e4 | 3164 | } |
198b5682 JL |
3165 | if (rc == 0) { |
3166 | spin_lock(&GlobalMid_Lock); | |
3167 | if (server->tcpStatus != CifsExiting) | |
3168 | server->tcpStatus = CifsGood; | |
3169 | else | |
3170 | rc = -EHOSTDOWN; | |
3171 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3172 | |
198b5682 JL |
3173 | } |
3174 | ||
3175 | return rc; | |
3176 | } | |
3177 | ||
3178 | ||
3179 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
3180 | struct nls_table *nls_info) | |
3181 | { | |
3182 | int rc = 0; | |
3183 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3184 | |
198b5682 JL |
3185 | ses->flags = 0; |
3186 | ses->capabilities = server->capabilities; | |
26b994fa | 3187 | if (linuxExtEnabled == 0) |
198b5682 | 3188 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3189 | |
b6b38f70 JP |
3190 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
3191 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 3192 | |
198b5682 | 3193 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3194 | if (rc) { |
b6b38f70 | 3195 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3196 | } else { |
5d0d2882 SP |
3197 | mutex_lock(&ses->server->srv_mutex); |
3198 | if (!server->session_estab) { | |
21e73393 | 3199 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3200 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3201 | server->sequence_number = 0x2; |
3202 | server->session_estab = true; | |
3203 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3204 | } |
3205 | mutex_unlock(&server->srv_mutex); | |
3206 | ||
b6b38f70 | 3207 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3208 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3209 | ses->status = CifsGood; |
3210 | ses->need_reconnect = false; | |
20418acd | 3211 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3212 | } |
26b994fa | 3213 | |
21e73393 SP |
3214 | kfree(ses->auth_key.response); |
3215 | ses->auth_key.response = NULL; | |
3216 | ses->auth_key.len = 0; | |
d3686d54 SP |
3217 | kfree(ses->ntlmssp); |
3218 | ses->ntlmssp = NULL; | |
21e73393 | 3219 | |
1da177e4 LT |
3220 | return rc; |
3221 | } | |
3222 | ||
d2445556 | 3223 | static struct cifsTconInfo * |
9d002df4 JL |
3224 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3225 | { | |
3226 | struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb); | |
3227 | struct cifsSesInfo *ses; | |
3228 | struct cifsTconInfo *tcon = NULL; | |
3229 | struct smb_vol *vol_info; | |
3230 | char username[MAX_USERNAME_SIZE + 1]; | |
3231 | ||
3232 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3233 | if (vol_info == NULL) { | |
3234 | tcon = ERR_PTR(-ENOMEM); | |
3235 | goto out; | |
3236 | } | |
3237 | ||
3238 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3239 | vol_info->username = username; | |
3240 | vol_info->local_nls = cifs_sb->local_nls; | |
3241 | vol_info->linux_uid = fsuid; | |
3242 | vol_info->cred_uid = fsuid; | |
3243 | vol_info->UNC = master_tcon->treeName; | |
3244 | vol_info->retry = master_tcon->retry; | |
3245 | vol_info->nocase = master_tcon->nocase; | |
3246 | vol_info->local_lease = master_tcon->local_lease; | |
3247 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3248 | ||
3249 | /* FIXME: allow for other secFlg settings */ | |
3250 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3251 | ||
3252 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3253 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3254 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3255 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3256 | |
3257 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3258 | if (IS_ERR(ses)) { | |
3259 | tcon = (struct cifsTconInfo *)ses; | |
3260 | cifs_put_tcp_session(master_tcon->ses->server); | |
3261 | goto out; | |
3262 | } | |
3263 | ||
3264 | tcon = cifs_get_tcon(ses, vol_info); | |
3265 | if (IS_ERR(tcon)) { | |
3266 | cifs_put_smb_ses(ses); | |
3267 | goto out; | |
3268 | } | |
3269 | ||
3270 | if (ses->capabilities & CAP_UNIX) | |
3271 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3272 | out: | |
3273 | kfree(vol_info); | |
3274 | ||
3275 | return tcon; | |
3276 | } | |
3277 | ||
413e661c | 3278 | static inline struct tcon_link * |
9d002df4 JL |
3279 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3280 | { | |
413e661c | 3281 | return cifs_sb->master_tlink; |
9d002df4 JL |
3282 | } |
3283 | ||
3284 | struct cifsTconInfo * | |
3285 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) | |
3286 | { | |
3287 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3288 | } | |
3289 | ||
3290 | static int | |
3291 | cifs_sb_tcon_pending_wait(void *unused) | |
3292 | { | |
3293 | schedule(); | |
3294 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3295 | } | |
3296 | ||
b647c35f JL |
3297 | /* find and return a tlink with given uid */ |
3298 | static struct tcon_link * | |
3299 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3300 | { | |
3301 | struct rb_node *node = root->rb_node; | |
3302 | struct tcon_link *tlink; | |
3303 | ||
3304 | while (node) { | |
3305 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3306 | ||
3307 | if (tlink->tl_uid > uid) | |
3308 | node = node->rb_left; | |
3309 | else if (tlink->tl_uid < uid) | |
3310 | node = node->rb_right; | |
3311 | else | |
3312 | return tlink; | |
3313 | } | |
3314 | return NULL; | |
3315 | } | |
3316 | ||
3317 | /* insert a tcon_link into the tree */ | |
3318 | static void | |
3319 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3320 | { | |
3321 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3322 | struct tcon_link *tlink; | |
3323 | ||
3324 | while (*new) { | |
3325 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3326 | parent = *new; | |
3327 | ||
3328 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3329 | new = &((*new)->rb_left); | |
3330 | else | |
3331 | new = &((*new)->rb_right); | |
3332 | } | |
3333 | ||
3334 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3335 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3336 | } | |
3337 | ||
9d002df4 JL |
3338 | /* |
3339 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3340 | * current task. | |
3341 | * | |
3342 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3343 | * the master tcon for the mount. | |
3344 | * | |
6ef933a3 | 3345 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3346 | * exists, then check to see if it's pending construction. If it is then wait |
3347 | * for construction to complete. Once it's no longer pending, check to see if | |
3348 | * it failed and either return an error or retry construction, depending on | |
3349 | * the timeout. | |
3350 | * | |
3351 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3352 | * try to construct a new one. | |
3353 | */ | |
3354 | struct tcon_link * | |
3355 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3356 | { | |
3357 | int ret; | |
b647c35f | 3358 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3359 | struct tcon_link *tlink, *newtlink; |
3360 | ||
3361 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3362 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3363 | ||
3364 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3365 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3366 | if (tlink) |
3367 | cifs_get_tlink(tlink); | |
3368 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3369 | ||
3370 | if (tlink == NULL) { | |
3371 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3372 | if (newtlink == NULL) | |
3373 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3374 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3375 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3376 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3377 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3378 | cifs_get_tlink(newtlink); | |
3379 | ||
9d002df4 JL |
3380 | spin_lock(&cifs_sb->tlink_tree_lock); |
3381 | /* was one inserted after previous search? */ | |
b647c35f | 3382 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3383 | if (tlink) { |
3384 | cifs_get_tlink(tlink); | |
3385 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3386 | kfree(newtlink); |
3387 | goto wait_for_construction; | |
3388 | } | |
9d002df4 | 3389 | tlink = newtlink; |
b647c35f JL |
3390 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3391 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3392 | } else { |
3393 | wait_for_construction: | |
3394 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3395 | cifs_sb_tcon_pending_wait, | |
3396 | TASK_INTERRUPTIBLE); | |
3397 | if (ret) { | |
3398 | cifs_put_tlink(tlink); | |
3399 | return ERR_PTR(ret); | |
3400 | } | |
3401 | ||
3402 | /* if it's good, return it */ | |
3403 | if (!IS_ERR(tlink->tl_tcon)) | |
3404 | return tlink; | |
3405 | ||
3406 | /* return error if we tried this already recently */ | |
3407 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3408 | cifs_put_tlink(tlink); | |
3409 | return ERR_PTR(-EACCES); | |
3410 | } | |
3411 | ||
3412 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3413 | goto wait_for_construction; | |
3414 | } | |
3415 | ||
3416 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3417 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3418 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3419 | ||
3420 | if (IS_ERR(tlink->tl_tcon)) { | |
3421 | cifs_put_tlink(tlink); | |
3422 | return ERR_PTR(-EACCES); | |
3423 | } | |
3424 | ||
3425 | return tlink; | |
3426 | } | |
2de970ff JL |
3427 | |
3428 | /* | |
3429 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3430 | * out tcons. | |
3431 | */ | |
3432 | static void | |
3433 | cifs_prune_tlinks(struct work_struct *work) | |
3434 | { | |
3435 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3436 | prune_tlinks.work); | |
b647c35f JL |
3437 | struct rb_root *root = &cifs_sb->tlink_tree; |
3438 | struct rb_node *node = rb_first(root); | |
3439 | struct rb_node *tmp; | |
3440 | struct tcon_link *tlink; | |
2de970ff | 3441 | |
b647c35f JL |
3442 | /* |
3443 | * Because we drop the spinlock in the loop in order to put the tlink | |
3444 | * it's not guarded against removal of links from the tree. The only | |
3445 | * places that remove entries from the tree are this function and | |
3446 | * umounts. Because this function is non-reentrant and is canceled | |
3447 | * before umount can proceed, this is safe. | |
3448 | */ | |
3449 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3450 | node = rb_first(root); | |
3451 | while (node != NULL) { | |
3452 | tmp = node; | |
3453 | node = rb_next(tmp); | |
3454 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3455 | ||
3456 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3457 | atomic_read(&tlink->tl_count) != 0 || | |
3458 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3459 | continue; | |
2de970ff | 3460 | |
b647c35f JL |
3461 | cifs_get_tlink(tlink); |
3462 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3463 | rb_erase(tmp, root); | |
3464 | ||
3465 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3466 | cifs_put_tlink(tlink); | |
3467 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3468 | } | |
3469 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3470 | |
3471 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3472 | TLINK_IDLE_EXPIRE); | |
3473 | } |