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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 | |
fd88ce93 | 202 | while (server->tcpStatus == CifsNeedReconnect) { |
6c3d8909 | 203 | try_to_freeze(); |
a9f1b85e PS |
204 | |
205 | /* we should try only the port we connected to before */ | |
206 | rc = generic_ip_connect(server); | |
fb8c4b14 | 207 | if (rc) { |
b6b38f70 | 208 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 209 | msleep(3000); |
1da177e4 LT |
210 | } else { |
211 | atomic_inc(&tcpSesReconnectCount); | |
212 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 213 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 214 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 215 | spin_unlock(&GlobalMid_Lock); |
1da177e4 LT |
216 | } |
217 | } | |
2b84a36c | 218 | |
1da177e4 LT |
219 | return rc; |
220 | } | |
221 | ||
fb8c4b14 | 222 | /* |
e4eb295d SF |
223 | return codes: |
224 | 0 not a transact2, or all data present | |
225 | >0 transact2 with that much data missing | |
226 | -EINVAL = invalid transact2 | |
227 | ||
228 | */ | |
fb8c4b14 | 229 | static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) |
e4eb295d | 230 | { |
fb8c4b14 | 231 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 232 | int remaining; |
26ec2548 | 233 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 234 | |
fb8c4b14 | 235 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
236 | return 0; |
237 | ||
fb8c4b14 SF |
238 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
239 | /* check for parm and data offset going beyond end of smb */ | |
240 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 241 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
242 | return -EINVAL; |
243 | } | |
244 | ||
245 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
246 | ||
26ec2548 JL |
247 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
248 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 249 | |
c0c7b905 | 250 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 251 | return 0; |
c0c7b905 | 252 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
253 | cFYI(1, "total data %d smaller than data in frame %d", |
254 | total_data_size, data_in_this_rsp); | |
e4eb295d | 255 | return -EINVAL; |
e4eb295d | 256 | } |
c0c7b905 JL |
257 | |
258 | remaining = total_data_size - data_in_this_rsp; | |
259 | ||
260 | cFYI(1, "missing %d bytes from transact2, check next response", | |
261 | remaining); | |
262 | if (total_data_size > maxBufSize) { | |
263 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", | |
264 | total_data_size, maxBufSize); | |
265 | return -EINVAL; | |
266 | } | |
267 | return remaining; | |
e4eb295d SF |
268 | } |
269 | ||
fb8c4b14 | 270 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
271 | { |
272 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
273 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
fb8c4b14 SF |
274 | char *data_area_of_target; |
275 | char *data_area_of_buf2; | |
26ec2548 | 276 | int remaining; |
2a2047bc JL |
277 | unsigned int byte_count, total_in_buf; |
278 | __u16 total_data_size, 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) |
2a2047bc | 291 | return -EPROTO; |
e4eb295d | 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 */ | |
e4eb295d | 312 | total_in_buf += total_in_buf2; |
2a2047bc JL |
313 | /* is the result too big for the field? */ |
314 | if (total_in_buf > USHRT_MAX) | |
315 | return -EPROTO; | |
26ec2548 | 316 | put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); |
2a2047bc JL |
317 | |
318 | /* fix up the BCC */ | |
690c522f | 319 | byte_count = get_bcc_le(pTargetSMB); |
e4eb295d | 320 | byte_count += total_in_buf2; |
2a2047bc JL |
321 | /* is the result too big for the field? */ |
322 | if (byte_count > USHRT_MAX) | |
323 | return -EPROTO; | |
690c522f | 324 | put_bcc_le(byte_count, pTargetSMB); |
e4eb295d | 325 | |
70ca734a | 326 | byte_count = pTargetSMB->smb_buf_length; |
e4eb295d | 327 | byte_count += total_in_buf2; |
2a2047bc JL |
328 | /* don't allow buffer to overflow */ |
329 | if (byte_count > CIFSMaxBufSize) | |
330 | return -ENOBUFS; | |
70ca734a | 331 | pTargetSMB->smb_buf_length = byte_count; |
e4eb295d | 332 | |
2a2047bc JL |
333 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
334 | ||
fb8c4b14 | 335 | if (remaining == total_in_buf2) { |
b6b38f70 | 336 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
337 | return 0; /* we are done */ |
338 | } else /* more responses to go */ | |
339 | return 1; | |
e4eb295d SF |
340 | } |
341 | ||
c74093b6 JL |
342 | static void |
343 | cifs_echo_request(struct work_struct *work) | |
344 | { | |
345 | int rc; | |
346 | struct TCP_Server_Info *server = container_of(work, | |
347 | struct TCP_Server_Info, echo.work); | |
348 | ||
247ec9b4 | 349 | /* |
195291e6 JL |
350 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
351 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
352 | * we got a response recently | |
247ec9b4 | 353 | */ |
195291e6 | 354 | if (server->maxBuf == 0 || |
247ec9b4 | 355 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
356 | goto requeue_echo; |
357 | ||
358 | rc = CIFSSMBEcho(server); | |
359 | if (rc) | |
360 | cFYI(1, "Unable to send echo request to server: %s", | |
361 | server->hostname); | |
362 | ||
363 | requeue_echo: | |
364 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
365 | } | |
366 | ||
1da177e4 LT |
367 | static int |
368 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
369 | { | |
370 | int length; | |
371 | unsigned int pdu_length, total_read; | |
372 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
373 | struct smb_hdr *bigbuf = NULL; |
374 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
375 | struct msghdr smb_msg; |
376 | struct kvec iov; | |
377 | struct socket *csocket = server->ssocket; | |
2b84a36c | 378 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
379 | struct task_struct *task_to_wake = NULL; |
380 | struct mid_q_entry *mid_entry; | |
70ca734a | 381 | char temp; |
4b18f2a9 SF |
382 | bool isLargeBuf = false; |
383 | bool isMultiRsp; | |
e4eb295d | 384 | int reconnect; |
1da177e4 | 385 | |
1da177e4 | 386 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 387 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
388 | |
389 | length = atomic_inc_return(&tcpSesAllocCount); | |
390 | if (length > 1) | |
26f57364 SF |
391 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
392 | GFP_KERNEL); | |
1da177e4 | 393 | |
83144186 | 394 | set_freezable(); |
469ee614 | 395 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
396 | if (try_to_freeze()) |
397 | continue; | |
b8643e1b SF |
398 | if (bigbuf == NULL) { |
399 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 400 | if (!bigbuf) { |
b6b38f70 | 401 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
402 | msleep(3000); |
403 | /* retry will check if exiting */ | |
404 | continue; | |
405 | } | |
0fd1ffe0 PM |
406 | } else if (isLargeBuf) { |
407 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 408 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 409 | } |
b8643e1b SF |
410 | |
411 | if (smallbuf == NULL) { | |
412 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 413 | if (!smallbuf) { |
b6b38f70 | 414 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
415 | msleep(1000); |
416 | /* retry will check if exiting */ | |
417 | continue; | |
418 | } | |
419 | /* beginning of smb buffer is cleared in our buf_get */ | |
420 | } else /* if existing small buf clear beginning */ | |
26f57364 | 421 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 422 | |
4b18f2a9 SF |
423 | isLargeBuf = false; |
424 | isMultiRsp = false; | |
b8643e1b | 425 | smb_buffer = smallbuf; |
1da177e4 LT |
426 | iov.iov_base = smb_buffer; |
427 | iov.iov_len = 4; | |
428 | smb_msg.msg_control = NULL; | |
429 | smb_msg.msg_controllen = 0; | |
f01d5e14 | 430 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 431 | |
f01d5e14 | 432 | incomplete_rcv: |
fd88ce93 | 433 | if (echo_retries > 0 && server->tcpStatus == CifsGood && |
fda35943 SF |
434 | time_after(jiffies, server->lstrp + |
435 | (echo_retries * SMB_ECHO_INTERVAL))) { | |
436 | cERROR(1, "Server %s has not responded in %d seconds. " | |
437 | "Reconnecting...", server->hostname, | |
438 | (echo_retries * SMB_ECHO_INTERVAL / HZ)); | |
439 | cifs_reconnect(server); | |
440 | csocket = server->ssocket; | |
441 | wake_up(&server->response_q); | |
442 | continue; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | length = |
446 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 447 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 448 | |
469ee614 | 449 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
450 | break; |
451 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 452 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 453 | cifs_reconnect(server); |
b6b38f70 | 454 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
455 | csocket = server->ssocket; |
456 | continue; | |
522bbe65 JL |
457 | } else if (length == -ERESTARTSYS || |
458 | length == -EAGAIN || | |
459 | length == -EINTR) { | |
b8643e1b | 460 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
461 | allowing socket to clear and app threads to set |
462 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
463 | if (pdu_length < 4) { |
464 | iov.iov_base = (4 - pdu_length) + | |
465 | (char *)smb_buffer; | |
466 | iov.iov_len = pdu_length; | |
467 | smb_msg.msg_control = NULL; | |
468 | smb_msg.msg_controllen = 0; | |
c18c732e | 469 | goto incomplete_rcv; |
c527c8a7 | 470 | } else |
c18c732e | 471 | continue; |
1da177e4 | 472 | } else if (length <= 0) { |
b6b38f70 JP |
473 | cFYI(1, "Reconnect after unexpected peek error %d", |
474 | length); | |
1da177e4 LT |
475 | cifs_reconnect(server); |
476 | csocket = server->ssocket; | |
477 | wake_up(&server->response_q); | |
478 | continue; | |
2a974680 | 479 | } else if (length < pdu_length) { |
b6b38f70 JP |
480 | cFYI(1, "requested %d bytes but only got %d bytes", |
481 | pdu_length, length); | |
f01d5e14 | 482 | pdu_length -= length; |
f01d5e14 SF |
483 | msleep(1); |
484 | goto incomplete_rcv; | |
46810cbf | 485 | } |
1da177e4 | 486 | |
70ca734a SF |
487 | /* The right amount was read from socket - 4 bytes */ |
488 | /* so we can now interpret the length field */ | |
46810cbf | 489 | |
70ca734a SF |
490 | /* the first byte big endian of the length field, |
491 | is actually not part of the length but the type | |
492 | with the most common, zero, as regular data */ | |
493 | temp = *((char *) smb_buffer); | |
46810cbf | 494 | |
fb8c4b14 | 495 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
496 | but we convert it here so it is always manipulated |
497 | as host byte order */ | |
5ca33c6a | 498 | pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length); |
70ca734a SF |
499 | smb_buffer->smb_buf_length = pdu_length; |
500 | ||
b6b38f70 | 501 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 502 | |
70ca734a | 503 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 504 | continue; |
70ca734a | 505 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 506 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 507 | continue; |
70ca734a | 508 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 509 | /* we get this from Windows 98 instead of |
46810cbf | 510 | an error on SMB negprot response */ |
b6b38f70 JP |
511 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
512 | pdu_length); | |
7332f2a6 JL |
513 | /* give server a second to clean up */ |
514 | msleep(1000); | |
515 | /* always try 445 first on reconnect since we get NACK | |
516 | * on some if we ever connected to port 139 (the NACK | |
517 | * is since we do not begin with RFC1001 session | |
518 | * initialize frame) | |
519 | */ | |
32670396 | 520 | cifs_set_port((struct sockaddr *) |
a9f1b85e | 521 | &server->dstaddr, CIFS_PORT); |
7332f2a6 JL |
522 | cifs_reconnect(server); |
523 | csocket = server->ssocket; | |
524 | wake_up(&server->response_q); | |
525 | continue; | |
70ca734a | 526 | } else if (temp != (char) 0) { |
b6b38f70 | 527 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
528 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
529 | length); | |
46810cbf SF |
530 | cifs_reconnect(server); |
531 | csocket = server->ssocket; | |
532 | continue; | |
e4eb295d SF |
533 | } |
534 | ||
535 | /* else we have an SMB response */ | |
fb8c4b14 | 536 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 537 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
538 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
539 | length, pdu_length+4); | |
e4eb295d SF |
540 | cifs_reconnect(server); |
541 | csocket = server->ssocket; | |
542 | wake_up(&server->response_q); | |
543 | continue; | |
fb8c4b14 | 544 | } |
e4eb295d SF |
545 | |
546 | /* else length ok */ | |
547 | reconnect = 0; | |
548 | ||
fb8c4b14 | 549 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 550 | isLargeBuf = true; |
e4eb295d SF |
551 | memcpy(bigbuf, smallbuf, 4); |
552 | smb_buffer = bigbuf; | |
553 | } | |
554 | length = 0; | |
555 | iov.iov_base = 4 + (char *)smb_buffer; | |
556 | iov.iov_len = pdu_length; | |
fb8c4b14 | 557 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
558 | total_read += length) { |
559 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
560 | pdu_length - total_read, 0); | |
522bbe65 | 561 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
562 | /* then will exit */ |
563 | reconnect = 2; | |
564 | break; | |
565 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
566 | cifs_reconnect(server); |
567 | csocket = server->ssocket; | |
fb8c4b14 | 568 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
569 | /* Now we will reread sock */ |
570 | reconnect = 1; | |
571 | break; | |
522bbe65 JL |
572 | } else if (length == -ERESTARTSYS || |
573 | length == -EAGAIN || | |
574 | length == -EINTR) { | |
e4eb295d | 575 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 576 | allowing socket to clear and app |
e4eb295d SF |
577 | threads to set tcpStatus |
578 | CifsNeedReconnect if server hung*/ | |
c18c732e | 579 | length = 0; |
46810cbf | 580 | continue; |
e4eb295d | 581 | } else if (length <= 0) { |
b6b38f70 JP |
582 | cERROR(1, "Received no data, expecting %d", |
583 | pdu_length - total_read); | |
e4eb295d SF |
584 | cifs_reconnect(server); |
585 | csocket = server->ssocket; | |
586 | reconnect = 1; | |
587 | break; | |
46810cbf | 588 | } |
e4eb295d | 589 | } |
fb8c4b14 | 590 | if (reconnect == 2) |
e4eb295d | 591 | break; |
fb8c4b14 | 592 | else if (reconnect == 1) |
e4eb295d | 593 | continue; |
1da177e4 | 594 | |
9587fcff | 595 | total_read += 4; /* account for rfc1002 hdr */ |
50c2f753 | 596 | |
9587fcff | 597 | dump_smb(smb_buffer, total_read); |
71823baf JL |
598 | |
599 | /* | |
600 | * We know that we received enough to get to the MID as we | |
601 | * checked the pdu_length earlier. Now check to see | |
602 | * if the rest of the header is OK. We borrow the length | |
603 | * var for the rest of the loop to avoid a new stack var. | |
604 | * | |
605 | * 48 bytes is enough to display the header and a little bit | |
606 | * into the payload for debugging purposes. | |
607 | */ | |
608 | length = checkSMB(smb_buffer, smb_buffer->Mid, total_read); | |
609 | if (length != 0) | |
9587fcff | 610 | cifs_dump_mem("Bad SMB: ", smb_buffer, |
71823baf | 611 | min_t(unsigned int, total_read, 48)); |
1da177e4 | 612 | |
2b84a36c | 613 | mid_entry = NULL; |
fda35943 SF |
614 | server->lstrp = jiffies; |
615 | ||
e4eb295d | 616 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 617 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
e4eb295d SF |
618 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
619 | ||
50c2f753 | 620 | if ((mid_entry->mid == smb_buffer->Mid) && |
e4eb295d SF |
621 | (mid_entry->midState == MID_REQUEST_SUBMITTED) && |
622 | (mid_entry->command == smb_buffer->Command)) { | |
71823baf JL |
623 | if (length == 0 && |
624 | check2ndT2(smb_buffer, server->maxBuf) > 0) { | |
e4eb295d | 625 | /* We have a multipart transact2 resp */ |
4b18f2a9 | 626 | isMultiRsp = true; |
fb8c4b14 | 627 | if (mid_entry->resp_buf) { |
e4eb295d | 628 | /* merge response - fix up 1st*/ |
50c2f753 | 629 | if (coalesce_t2(smb_buffer, |
e4eb295d | 630 | mid_entry->resp_buf)) { |
4b18f2a9 SF |
631 | mid_entry->multiRsp = |
632 | true; | |
e4eb295d SF |
633 | break; |
634 | } else { | |
635 | /* all parts received */ | |
4b18f2a9 SF |
636 | mid_entry->multiEnd = |
637 | true; | |
50c2f753 | 638 | goto multi_t2_fnd; |
e4eb295d SF |
639 | } |
640 | } else { | |
fb8c4b14 | 641 | if (!isLargeBuf) { |
b6b38f70 | 642 | cERROR(1, "1st trans2 resp needs bigbuf"); |
e4eb295d | 643 | /* BB maybe we can fix this up, switch |
50c2f753 | 644 | to already allocated large buffer? */ |
e4eb295d | 645 | } else { |
cd63499c | 646 | /* Have first buffer */ |
e4eb295d SF |
647 | mid_entry->resp_buf = |
648 | smb_buffer; | |
4b18f2a9 SF |
649 | mid_entry->largeBuf = |
650 | true; | |
e4eb295d SF |
651 | bigbuf = NULL; |
652 | } | |
653 | } | |
654 | break; | |
50c2f753 | 655 | } |
e4eb295d | 656 | mid_entry->resp_buf = smb_buffer; |
4b18f2a9 | 657 | mid_entry->largeBuf = isLargeBuf; |
e4eb295d | 658 | multi_t2_fnd: |
71823baf JL |
659 | if (length == 0) |
660 | mid_entry->midState = | |
661 | MID_RESPONSE_RECEIVED; | |
662 | else | |
663 | mid_entry->midState = | |
664 | MID_RESPONSE_MALFORMED; | |
1047abc1 SF |
665 | #ifdef CONFIG_CIFS_STATS2 |
666 | mid_entry->when_received = jiffies; | |
667 | #endif | |
64474bdd SP |
668 | list_del_init(&mid_entry->qhead); |
669 | mid_entry->callback(mid_entry); | |
e4eb295d | 670 | break; |
46810cbf | 671 | } |
2b84a36c | 672 | mid_entry = NULL; |
1da177e4 | 673 | } |
e4eb295d | 674 | spin_unlock(&GlobalMid_Lock); |
2b84a36c JL |
675 | |
676 | if (mid_entry != NULL) { | |
cd63499c | 677 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 678 | if (!isMultiRsp) { |
cd63499c | 679 | /* smb buffer will be freed by user thread */ |
26f57364 | 680 | if (isLargeBuf) |
cd63499c | 681 | bigbuf = NULL; |
26f57364 | 682 | else |
cd63499c SF |
683 | smallbuf = NULL; |
684 | } | |
71823baf JL |
685 | } else if (length != 0) { |
686 | /* response sanity checks failed */ | |
687 | continue; | |
4b18f2a9 SF |
688 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
689 | !isMultiRsp) { | |
b6b38f70 | 690 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 691 | "NumMids %d", atomic_read(&midCount)); |
50c2f753 | 692 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 693 | sizeof(struct smb_hdr)); |
3979877e SF |
694 | #ifdef CONFIG_CIFS_DEBUG2 |
695 | cifs_dump_detail(smb_buffer); | |
696 | cifs_dump_mids(server); | |
697 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 698 | |
e4eb295d SF |
699 | } |
700 | } /* end while !EXITING */ | |
701 | ||
e7ddee90 | 702 | /* take it off the list, if it's not already */ |
3f9bcca7 | 703 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 704 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 705 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 706 | |
1da177e4 LT |
707 | spin_lock(&GlobalMid_Lock); |
708 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 709 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 710 | wake_up_all(&server->response_q); |
e691b9d1 | 711 | |
31ca3bc3 SF |
712 | /* check if we have blocked requests that need to free */ |
713 | /* Note that cifs_max_pending is normally 50, but | |
714 | can be set at module install time to as little as two */ | |
e691b9d1 | 715 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 716 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
717 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
718 | /* We do not want to set the max_pending too low or we | |
719 | could end up with the counter going negative */ | |
1da177e4 | 720 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 721 | /* Although there should not be any requests blocked on |
1da177e4 | 722 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 723 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
724 | to the same server - they now will see the session is in exit state |
725 | and get out of SendReceive. */ | |
726 | wake_up_all(&server->request_q); | |
727 | /* give those requests time to exit */ | |
b8643e1b | 728 | msleep(125); |
50c2f753 | 729 | |
fb8c4b14 | 730 | if (server->ssocket) { |
1da177e4 LT |
731 | sock_release(csocket); |
732 | server->ssocket = NULL; | |
733 | } | |
b8643e1b | 734 | /* buffer usuallly freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
735 | cifs_buf_release(bigbuf); |
736 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 737 | cifs_small_buf_release(smallbuf); |
1da177e4 | 738 | |
9d78315b | 739 | if (!list_empty(&server->pending_mid_q)) { |
1da177e4 | 740 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 741 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
9d78315b | 742 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
2b84a36c JL |
743 | cFYI(1, "Clearing Mid 0x%x - issuing callback", |
744 | mid_entry->mid); | |
745 | list_del_init(&mid_entry->qhead); | |
746 | mid_entry->callback(mid_entry); | |
1da177e4 LT |
747 | } |
748 | spin_unlock(&GlobalMid_Lock); | |
1da177e4 | 749 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 750 | msleep(125); |
1da177e4 LT |
751 | } |
752 | ||
f191401f | 753 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 754 | /* mpx threads have not exited yet give them |
1da177e4 | 755 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
756 | /* due to delays on oplock break requests, we need |
757 | to wait at least 45 seconds before giving up | |
758 | on a request getting a response and going ahead | |
759 | and killing cifsd */ | |
b6b38f70 | 760 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 761 | msleep(46000); |
1da177e4 LT |
762 | /* if threads still have not exited they are probably never |
763 | coming home not much else we can do but free the memory */ | |
764 | } | |
1da177e4 | 765 | |
c359cf3c | 766 | kfree(server->hostname); |
b1c8d2b4 | 767 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 768 | kfree(server); |
93d0ec85 JL |
769 | |
770 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
771 | if (length > 0) |
772 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
773 | GFP_KERNEL); | |
50c2f753 | 774 | |
b1c8d2b4 JL |
775 | /* if server->tsk was NULL then wait for a signal before exiting */ |
776 | if (!task_to_wake) { | |
777 | set_current_state(TASK_INTERRUPTIBLE); | |
778 | while (!signal_pending(current)) { | |
779 | schedule(); | |
780 | set_current_state(TASK_INTERRUPTIBLE); | |
781 | } | |
782 | set_current_state(TASK_RUNNING); | |
783 | } | |
784 | ||
0468a2cf | 785 | module_put_and_exit(0); |
1da177e4 LT |
786 | } |
787 | ||
c359cf3c JL |
788 | /* extract the host portion of the UNC string */ |
789 | static char * | |
790 | extract_hostname(const char *unc) | |
791 | { | |
792 | const char *src; | |
793 | char *dst, *delim; | |
794 | unsigned int len; | |
795 | ||
796 | /* skip double chars at beginning of string */ | |
797 | /* BB: check validity of these bytes? */ | |
798 | src = unc + 2; | |
799 | ||
800 | /* delimiter between hostname and sharename is always '\\' now */ | |
801 | delim = strchr(src, '\\'); | |
802 | if (!delim) | |
803 | return ERR_PTR(-EINVAL); | |
804 | ||
805 | len = delim - src; | |
806 | dst = kmalloc((len + 1), GFP_KERNEL); | |
807 | if (dst == NULL) | |
808 | return ERR_PTR(-ENOMEM); | |
809 | ||
810 | memcpy(dst, src, len); | |
811 | dst[len] = '\0'; | |
812 | ||
813 | return dst; | |
814 | } | |
815 | ||
1da177e4 | 816 | static int |
50c2f753 SF |
817 | cifs_parse_mount_options(char *options, const char *devname, |
818 | struct smb_vol *vol) | |
1da177e4 | 819 | { |
4906e50b | 820 | char *value, *data, *end; |
1da177e4 LT |
821 | unsigned int temp_len, i, j; |
822 | char separator[2]; | |
9b9d6b24 JL |
823 | short int override_uid = -1; |
824 | short int override_gid = -1; | |
825 | bool uid_specified = false; | |
826 | bool gid_specified = false; | |
88463999 | 827 | char *nodename = utsname()->nodename; |
1da177e4 LT |
828 | |
829 | separator[0] = ','; | |
50c2f753 | 830 | separator[1] = 0; |
1da177e4 | 831 | |
88463999 JL |
832 | /* |
833 | * does not have to be perfect mapping since field is | |
834 | * informational, only used for servers that do not support | |
835 | * port 445 and it can be overridden at mount time | |
836 | */ | |
1397f2ee JL |
837 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
838 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
839 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
840 | ||
1397f2ee | 841 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
842 | /* null target name indicates to use *SMBSERVR default called name |
843 | if we end up sending RFC1001 session initialize */ | |
844 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
845 | vol->cred_uid = current_uid(); |
846 | vol->linux_uid = current_uid(); | |
a001e5b5 | 847 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
848 | |
849 | /* default to only allowing write access to owner of the mount */ | |
850 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
851 | |
852 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
853 | /* default is always to request posix paths. */ |
854 | vol->posix_paths = 1; | |
a0c9217f JL |
855 | /* default to using server inode numbers where available */ |
856 | vol->server_ino = 1; | |
ac67055e | 857 | |
6d20e840 SJ |
858 | vol->actimeo = CIFS_DEF_ACTIMEO; |
859 | ||
1da177e4 LT |
860 | if (!options) |
861 | return 1; | |
862 | ||
4906e50b | 863 | end = options + strlen(options); |
50c2f753 | 864 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 865 | if (options[4] != 0) { |
1da177e4 LT |
866 | separator[0] = options[4]; |
867 | options += 5; | |
868 | } else { | |
b6b38f70 | 869 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
870 | } |
871 | } | |
50c2f753 | 872 | |
1da177e4 LT |
873 | while ((data = strsep(&options, separator)) != NULL) { |
874 | if (!*data) | |
875 | continue; | |
876 | if ((value = strchr(data, '=')) != NULL) | |
877 | *value++ = '\0'; | |
878 | ||
50c2f753 SF |
879 | /* Have to parse this before we parse for "user" */ |
880 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 881 | vol->no_xattr = 0; |
50c2f753 | 882 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
883 | vol->no_xattr = 1; |
884 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 885 | if (!value) { |
1da177e4 LT |
886 | printk(KERN_WARNING |
887 | "CIFS: invalid or missing username\n"); | |
888 | return 1; /* needs_arg; */ | |
fb8c4b14 | 889 | } else if (!*value) { |
4b952a9b SF |
890 | /* null user, ie anonymous, authentication */ |
891 | vol->nullauth = 1; | |
1da177e4 | 892 | } |
8727c8a8 SF |
893 | if (strnlen(value, MAX_USERNAME_SIZE) < |
894 | MAX_USERNAME_SIZE) { | |
1da177e4 LT |
895 | vol->username = value; |
896 | } else { | |
897 | printk(KERN_WARNING "CIFS: username too long\n"); | |
898 | return 1; | |
899 | } | |
900 | } else if (strnicmp(data, "pass", 4) == 0) { | |
901 | if (!value) { | |
902 | vol->password = NULL; | |
903 | continue; | |
fb8c4b14 | 904 | } else if (value[0] == 0) { |
1da177e4 LT |
905 | /* check if string begins with double comma |
906 | since that would mean the password really | |
907 | does start with a comma, and would not | |
908 | indicate an empty string */ | |
fb8c4b14 | 909 | if (value[1] != separator[0]) { |
1da177e4 LT |
910 | vol->password = NULL; |
911 | continue; | |
912 | } | |
913 | } | |
914 | temp_len = strlen(value); | |
915 | /* removed password length check, NTLM passwords | |
916 | can be arbitrarily long */ | |
917 | ||
50c2f753 | 918 | /* if comma in password, the string will be |
1da177e4 LT |
919 | prematurely null terminated. Commas in password are |
920 | specified across the cifs mount interface by a double | |
921 | comma ie ,, and a comma used as in other cases ie ',' | |
922 | as a parameter delimiter/separator is single and due | |
923 | to the strsep above is temporarily zeroed. */ | |
924 | ||
925 | /* NB: password legally can have multiple commas and | |
926 | the only illegal character in a password is null */ | |
927 | ||
50c2f753 | 928 | if ((value[temp_len] == 0) && |
4906e50b | 929 | (value + temp_len < end) && |
09d1db5c | 930 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
931 | /* reinsert comma */ |
932 | value[temp_len] = separator[0]; | |
50c2f753 SF |
933 | temp_len += 2; /* move after second comma */ |
934 | while (value[temp_len] != 0) { | |
1da177e4 | 935 | if (value[temp_len] == separator[0]) { |
50c2f753 | 936 | if (value[temp_len+1] == |
09d1db5c SF |
937 | separator[0]) { |
938 | /* skip second comma */ | |
939 | temp_len++; | |
50c2f753 | 940 | } else { |
1da177e4 LT |
941 | /* single comma indicating start |
942 | of next parm */ | |
943 | break; | |
944 | } | |
945 | } | |
946 | temp_len++; | |
947 | } | |
fb8c4b14 | 948 | if (value[temp_len] == 0) { |
1da177e4 LT |
949 | options = NULL; |
950 | } else { | |
951 | value[temp_len] = 0; | |
952 | /* point option to start of next parm */ | |
953 | options = value + temp_len + 1; | |
954 | } | |
50c2f753 | 955 | /* go from value to value + temp_len condensing |
1da177e4 LT |
956 | double commas to singles. Note that this ends up |
957 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 958 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 959 | if (vol->password == NULL) { |
50c2f753 SF |
960 | printk(KERN_WARNING "CIFS: no memory " |
961 | "for password\n"); | |
433dc24f SF |
962 | return 1; |
963 | } | |
50c2f753 | 964 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 965 | vol->password[j] = value[i]; |
fb8c4b14 | 966 | if (value[i] == separator[0] |
09d1db5c | 967 | && value[i+1] == separator[0]) { |
1da177e4 LT |
968 | /* skip second comma */ |
969 | i++; | |
970 | } | |
971 | } | |
972 | vol->password[j] = 0; | |
973 | } else { | |
e915fc49 | 974 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 975 | if (vol->password == NULL) { |
50c2f753 SF |
976 | printk(KERN_WARNING "CIFS: no memory " |
977 | "for password\n"); | |
433dc24f SF |
978 | return 1; |
979 | } | |
1da177e4 LT |
980 | strcpy(vol->password, value); |
981 | } | |
58f7f68f JL |
982 | } else if (!strnicmp(data, "ip", 2) || |
983 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
984 | if (!value || !*value) { |
985 | vol->UNCip = NULL; | |
50b64e3b JL |
986 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
987 | INET6_ADDRSTRLEN) { | |
1da177e4 LT |
988 | vol->UNCip = value; |
989 | } else { | |
50c2f753 SF |
990 | printk(KERN_WARNING "CIFS: ip address " |
991 | "too long\n"); | |
1da177e4 LT |
992 | return 1; |
993 | } | |
50c2f753 SF |
994 | } else if (strnicmp(data, "sec", 3) == 0) { |
995 | if (!value || !*value) { | |
b6b38f70 | 996 | cERROR(1, "no security value specified"); |
50c2f753 SF |
997 | continue; |
998 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
999 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 1000 | CIFSSEC_MUST_SIGN; |
bf820679 | 1001 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
1002 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
1003 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 1004 | cERROR(1, "Krb5 cifs privacy not supported"); |
bf820679 SF |
1005 | return 1; |
1006 | } else if (strnicmp(value, "krb5", 4) == 0) { | |
750d1151 | 1007 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
1008 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
1009 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1010 | CIFSSEC_MUST_SIGN; | |
1011 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1012 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1013 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1014 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1015 | CIFSSEC_MUST_SIGN; |
bf820679 | 1016 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1017 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1018 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1019 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1020 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1021 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1022 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1023 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1024 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1025 | /* BB is there a better way to do this? */ |
750d1151 | 1026 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1027 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1028 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1029 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1030 | #endif |
bf820679 | 1031 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1032 | vol->nullauth = 1; |
50c2f753 | 1033 | } else { |
b6b38f70 | 1034 | cERROR(1, "bad security option: %s", value); |
50c2f753 SF |
1035 | return 1; |
1036 | } | |
1da177e4 LT |
1037 | } else if ((strnicmp(data, "unc", 3) == 0) |
1038 | || (strnicmp(data, "target", 6) == 0) | |
1039 | || (strnicmp(data, "path", 4) == 0)) { | |
1040 | if (!value || !*value) { | |
50c2f753 SF |
1041 | printk(KERN_WARNING "CIFS: invalid path to " |
1042 | "network resource\n"); | |
1da177e4 LT |
1043 | return 1; /* needs_arg; */ |
1044 | } | |
1045 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1046 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1047 | if (vol->UNC == NULL) |
1da177e4 | 1048 | return 1; |
50c2f753 | 1049 | strcpy(vol->UNC, value); |
1da177e4 LT |
1050 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1051 | vol->UNC[0] = '\\'; | |
1052 | vol->UNC[1] = '\\'; | |
50c2f753 | 1053 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1054 | printk(KERN_WARNING |
50c2f753 SF |
1055 | "CIFS: UNC Path does not begin " |
1056 | "with // or \\\\ \n"); | |
1da177e4 LT |
1057 | return 1; |
1058 | } | |
1059 | } else { | |
1060 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1061 | return 1; | |
1062 | } | |
1063 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1064 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1065 | if (!value || !*value) { | |
1066 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
1067 | return 1; /* needs_arg; */ | |
1068 | } | |
1069 | /* BB are there cases in which a comma can be valid in | |
1070 | a domain name and need special handling? */ | |
3979877e | 1071 | if (strnlen(value, 256) < 256) { |
1da177e4 | 1072 | vol->domainname = value; |
b6b38f70 | 1073 | cFYI(1, "Domain name set"); |
1da177e4 | 1074 | } else { |
50c2f753 SF |
1075 | printk(KERN_WARNING "CIFS: domain name too " |
1076 | "long\n"); | |
1da177e4 LT |
1077 | return 1; |
1078 | } | |
3eb9a889 BG |
1079 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1080 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1081 | ||
1082 | if (!value || !*value) { | |
1083 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1084 | " not specified.\n"); | |
1085 | return 1; /* needs_arg; */ | |
1086 | } | |
1087 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1088 | value, strlen(value)); | |
b235f371 | 1089 | if (i == 0) { |
3eb9a889 BG |
1090 | printk(KERN_WARNING "CIFS: Could not parse" |
1091 | " srcaddr: %s\n", | |
1092 | value); | |
1093 | return 1; | |
1094 | } | |
50c2f753 SF |
1095 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1096 | if (!value || !*value) { | |
1097 | printk(KERN_WARNING | |
1098 | "CIFS: invalid path prefix\n"); | |
1099 | return 1; /* needs_argument */ | |
1100 | } | |
1101 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1102 | if (value[0] != '/') |
2fe87f02 | 1103 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1104 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1105 | if (vol->prepath == NULL) | |
1106 | return 1; | |
4523cc30 | 1107 | if (value[0] != '/') { |
2fe87f02 | 1108 | vol->prepath[0] = '/'; |
50c2f753 | 1109 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1110 | } else |
50c2f753 | 1111 | strcpy(vol->prepath, value); |
b6b38f70 | 1112 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1113 | } else { |
1114 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1115 | return 1; | |
1116 | } | |
1da177e4 LT |
1117 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1118 | if (!value || !*value) { | |
63135e08 SF |
1119 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1120 | "specified\n"); | |
1da177e4 LT |
1121 | return 1; /* needs_arg; */ |
1122 | } | |
1123 | if (strnlen(value, 65) < 65) { | |
50c2f753 | 1124 | if (strnicmp(value, "default", 7)) |
1da177e4 | 1125 | vol->iocharset = value; |
50c2f753 SF |
1126 | /* if iocharset not set then load_nls_default |
1127 | is used by caller */ | |
b6b38f70 | 1128 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1129 | } else { |
63135e08 SF |
1130 | printk(KERN_WARNING "CIFS: iocharset name " |
1131 | "too long.\n"); | |
1da177e4 LT |
1132 | return 1; |
1133 | } | |
9b9d6b24 JL |
1134 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1135 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1136 | uid_specified = true; | |
bd763319 JL |
1137 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1138 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1139 | } else if (!strnicmp(data, "forceuid", 8)) { |
1140 | override_uid = 1; | |
1141 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1142 | override_uid = 0; | |
1143 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1144 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1145 | gid_specified = true; | |
1146 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1147 | override_gid = 1; | |
1148 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1149 | override_gid = 0; | |
1da177e4 LT |
1150 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1151 | if (value && *value) { | |
1152 | vol->file_mode = | |
1153 | simple_strtoul(value, &value, 0); | |
1154 | } | |
1155 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1156 | if (value && *value) { | |
1157 | vol->dir_mode = | |
1158 | simple_strtoul(value, &value, 0); | |
1159 | } | |
1160 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1161 | if (value && *value) { | |
1162 | vol->dir_mode = | |
1163 | simple_strtoul(value, &value, 0); | |
1164 | } | |
1165 | } else if (strnicmp(data, "port", 4) == 0) { | |
1166 | if (value && *value) { | |
1167 | vol->port = | |
1168 | simple_strtoul(value, &value, 0); | |
1169 | } | |
1170 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1171 | if (value && *value) { | |
1172 | vol->rsize = | |
1173 | simple_strtoul(value, &value, 0); | |
1174 | } | |
1175 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1176 | if (value && *value) { | |
1177 | vol->wsize = | |
1178 | simple_strtoul(value, &value, 0); | |
1179 | } | |
1180 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1181 | if (!value || !*value) { |
b6b38f70 | 1182 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1183 | continue; |
1184 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1185 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1186 | } |
1187 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1188 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1189 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1190 | } else { |
1397f2ee JL |
1191 | memset(vol->source_rfc1001_name, 0x20, |
1192 | RFC1001_NAME_LEN); | |
1193 | /* | |
1194 | * FIXME: are there cases in which a comma can | |
1195 | * be valid in workstation netbios name (and | |
1196 | * need special handling)? | |
1197 | */ | |
1198 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1199 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1200 | if (value[i] == 0) |
1da177e4 | 1201 | break; |
1397f2ee | 1202 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1203 | } |
1204 | /* The string has 16th byte zero still from | |
1205 | set at top of the function */ | |
1397f2ee | 1206 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1207 | printk(KERN_WARNING "CIFS: netbiosname" |
1208 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1209 | } |
1210 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1211 | /* servernetbiosname specified override *SMBSERVER */ | |
1212 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1213 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1214 | } else { |
1215 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1216 | memset(vol->target_rfc1001_name, 0x20, |
1217 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1218 | |
50c2f753 | 1219 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1220 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1221 | valid in this workstation netbios name |
1222 | (and need special handling)? */ | |
a10faeb2 | 1223 | |
50c2f753 SF |
1224 | /* user or mount helper must uppercase |
1225 | the netbiosname */ | |
1226 | if (value[i] == 0) | |
a10faeb2 SF |
1227 | break; |
1228 | else | |
50c2f753 SF |
1229 | vol->target_rfc1001_name[i] = |
1230 | value[i]; | |
a10faeb2 SF |
1231 | } |
1232 | /* The string has 16th byte zero still from | |
1233 | set at top of the function */ | |
1397f2ee | 1234 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1235 | printk(KERN_WARNING "CIFS: server net" |
1236 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1237 | } |
6d20e840 SJ |
1238 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1239 | if (value && *value) { | |
1240 | vol->actimeo = HZ * simple_strtoul(value, | |
1241 | &value, 0); | |
1242 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1243 | cERROR(1, "CIFS: attribute cache" | |
1244 | "timeout too large"); | |
1245 | return 1; | |
1246 | } | |
1247 | } | |
1da177e4 LT |
1248 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1249 | /* ignore */ | |
1250 | } else if (strnicmp(data, "version", 3) == 0) { | |
1251 | /* ignore */ | |
50c2f753 | 1252 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1253 | /* ignore */ |
71a394fa SF |
1254 | } else if (strnicmp(data, "rw", 2) == 0) { |
1255 | /* ignore */ | |
1256 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1257 | /* ignore */ | |
edf1ae40 SF |
1258 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1259 | vol->noblocksnd = 1; | |
1260 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1261 | vol->noautotune = 1; | |
1da177e4 LT |
1262 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1263 | (strnicmp(data, "nosuid", 6) == 0) || | |
1264 | (strnicmp(data, "exec", 4) == 0) || | |
1265 | (strnicmp(data, "noexec", 6) == 0) || | |
1266 | (strnicmp(data, "nodev", 5) == 0) || | |
1267 | (strnicmp(data, "noauto", 6) == 0) || | |
1268 | (strnicmp(data, "dev", 3) == 0)) { | |
1269 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1270 | uses these opts to set flags, and the flags are read |
1271 | by the kernel vfs layer before we get here (ie | |
1272 | before read super) so there is no point trying to | |
1273 | parse these options again and set anything and it | |
1274 | is ok to just ignore them */ | |
1da177e4 | 1275 | continue; |
1da177e4 LT |
1276 | } else if (strnicmp(data, "hard", 4) == 0) { |
1277 | vol->retry = 1; | |
1278 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1279 | vol->retry = 0; | |
1280 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1281 | vol->noperm = 0; | |
1282 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1283 | vol->noperm = 1; | |
6a0b4824 SF |
1284 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1285 | vol->remap = 1; | |
1286 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1287 | vol->remap = 0; | |
50c2f753 SF |
1288 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1289 | vol->sfu_emul = 1; | |
1290 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1291 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1292 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1293 | vol->nodfs = 1; | |
ac67055e JA |
1294 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1295 | vol->posix_paths = 1; | |
1296 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1297 | vol->posix_paths = 0; | |
c18c842b SF |
1298 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1299 | vol->no_linux_ext = 1; | |
1300 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1301 | vol->no_linux_ext = 1; | |
50c2f753 | 1302 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1303 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1304 | vol->nocase = 1; |
f636a348 JL |
1305 | } else if (strnicmp(data, "mand", 4) == 0) { |
1306 | /* ignore */ | |
1307 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1308 | /* ignore */ | |
1309 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1310 | /* ignore */ | |
c46fa8ac SF |
1311 | } else if (strnicmp(data, "brl", 3) == 0) { |
1312 | vol->nobrl = 0; | |
50c2f753 | 1313 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1314 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1315 | vol->nobrl = 1; |
d3485d37 SF |
1316 | /* turn off mandatory locking in mode |
1317 | if remote locking is turned off since the | |
1318 | local vfs will do advisory */ | |
50c2f753 SF |
1319 | if (vol->file_mode == |
1320 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1321 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1322 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1323 | /* will take the shorter form "forcemand" as well */ | |
1324 | /* This mount option will force use of mandatory | |
1325 | (DOS/Windows style) byte range locks, instead of | |
1326 | using posix advisory byte range locks, even if the | |
1327 | Unix extensions are available and posix locks would | |
1328 | be supported otherwise. If Unix extensions are not | |
1329 | negotiated this has no effect since mandatory locks | |
1330 | would be used (mandatory locks is all that those | |
1331 | those servers support) */ | |
1332 | vol->mand_lock = 1; | |
1da177e4 LT |
1333 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1334 | vol->setuids = 1; | |
1335 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1336 | vol->setuids = 0; | |
d0a9c078 JL |
1337 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1338 | vol->dynperm = true; | |
1339 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1340 | vol->dynperm = false; | |
1da177e4 LT |
1341 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1342 | vol->retry = 0; | |
1343 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1344 | vol->retry = 1; | |
1345 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1346 | vol->intr = 0; | |
1347 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1348 | vol->intr = 1; | |
be652445 SF |
1349 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1350 | vol->nostrictsync = 1; | |
1351 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1352 | vol->nostrictsync = 0; | |
50c2f753 | 1353 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1354 | vol->server_ino = 1; |
50c2f753 | 1355 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1356 | vol->server_ino = 0; |
50c2f753 | 1357 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1358 | vol->cifs_acl = 1; |
1359 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1360 | vol->cifs_acl = 0; | |
50c2f753 | 1361 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1362 | vol->no_psx_acl = 0; |
50c2f753 | 1363 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1364 | vol->no_psx_acl = 1; |
84210e91 SF |
1365 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1366 | vol->local_lease = 1; | |
50c2f753 | 1367 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1368 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1369 | } else if (strnicmp(data, "seal", 4) == 0) { |
1370 | /* we do not do the following in secFlags because seal | |
1371 | is a per tree connection (mount) not a per socket | |
1372 | or per-smb connection option in the protocol */ | |
1373 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1374 | vol->seal = 1; | |
50c2f753 | 1375 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1376 | vol->direct_io = 1; |
50c2f753 | 1377 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1378 | vol->direct_io = 1; |
d39454ff PS |
1379 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1380 | vol->strict_io = 1; | |
1da177e4 | 1381 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1382 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1383 | "supported. Instead set " | |
1384 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1385 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d SJ |
1386 | #ifndef CONFIG_CIFS_FSCACHE |
1387 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" | |
1388 | "kernel config option set"); | |
1389 | return 1; | |
1390 | #endif | |
fa1df75d | 1391 | vol->fsc = true; |
736a3320 SM |
1392 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1393 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1394 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1395 | vol->multiuser = true; | |
1da177e4 | 1396 | } else |
50c2f753 SF |
1397 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1398 | data); | |
1da177e4 LT |
1399 | } |
1400 | if (vol->UNC == NULL) { | |
4523cc30 | 1401 | if (devname == NULL) { |
50c2f753 SF |
1402 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1403 | "target\n"); | |
1da177e4 LT |
1404 | return 1; |
1405 | } | |
1406 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1407 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1408 | if (vol->UNC == NULL) |
1da177e4 | 1409 | return 1; |
50c2f753 | 1410 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1411 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1412 | vol->UNC[0] = '\\'; | |
1413 | vol->UNC[1] = '\\'; | |
1414 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1415 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1416 | "begin with // or \\\\ \n"); | |
1da177e4 LT |
1417 | return 1; |
1418 | } | |
7c5e628f IM |
1419 | value = strpbrk(vol->UNC+2, "/\\"); |
1420 | if (value) | |
1421 | *value = '\\'; | |
1da177e4 LT |
1422 | } else { |
1423 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1424 | return 1; | |
1425 | } | |
1426 | } | |
0eb8a132 JL |
1427 | |
1428 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1429 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1430 | "authentication!"); | |
1431 | return 1; | |
1432 | } | |
1433 | ||
fb8c4b14 | 1434 | if (vol->UNCip == NULL) |
1da177e4 LT |
1435 | vol->UNCip = &vol->UNC[2]; |
1436 | ||
9b9d6b24 JL |
1437 | if (uid_specified) |
1438 | vol->override_uid = override_uid; | |
1439 | else if (override_uid == 1) | |
1440 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1441 | "specified with no uid= option.\n"); | |
1442 | ||
1443 | if (gid_specified) | |
1444 | vol->override_gid = override_gid; | |
1445 | else if (override_gid == 1) | |
1446 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1447 | "specified with no gid= option.\n"); | |
1448 | ||
1da177e4 LT |
1449 | return 0; |
1450 | } | |
1451 | ||
3eb9a889 BG |
1452 | /** Returns true if srcaddr isn't specified and rhs isn't |
1453 | * specified, or if srcaddr is specified and | |
1454 | * matches the IP address of the rhs argument. | |
1455 | */ | |
1456 | static bool | |
1457 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1458 | { | |
1459 | switch (srcaddr->sa_family) { | |
1460 | case AF_UNSPEC: | |
1461 | return (rhs->sa_family == AF_UNSPEC); | |
1462 | case AF_INET: { | |
1463 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1464 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1465 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1466 | } | |
1467 | case AF_INET6: { | |
1468 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1469 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1470 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1471 | } | |
1472 | default: | |
1473 | WARN_ON(1); | |
1474 | return false; /* don't expect to be here */ | |
1475 | } | |
1476 | } | |
1477 | ||
4b886136 PS |
1478 | /* |
1479 | * If no port is specified in addr structure, we try to match with 445 port | |
1480 | * and if it fails - with 139 ports. It should be called only if address | |
1481 | * families of server and addr are equal. | |
1482 | */ | |
1483 | static bool | |
1484 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1485 | { | |
6da97910 | 1486 | __be16 port, *sport; |
4b886136 PS |
1487 | |
1488 | switch (addr->sa_family) { | |
1489 | case AF_INET: | |
1490 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1491 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1492 | break; | |
1493 | case AF_INET6: | |
1494 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1495 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1496 | break; | |
1497 | default: | |
1498 | WARN_ON(1); | |
1499 | return false; | |
1500 | } | |
1501 | ||
1502 | if (!port) { | |
1503 | port = htons(CIFS_PORT); | |
1504 | if (port == *sport) | |
1505 | return true; | |
1506 | ||
1507 | port = htons(RFC1001_PORT); | |
1508 | } | |
1509 | ||
1510 | return port == *sport; | |
1511 | } | |
3eb9a889 | 1512 | |
4515148e | 1513 | static bool |
3eb9a889 BG |
1514 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1515 | struct sockaddr *srcaddr) | |
4515148e | 1516 | { |
4515148e | 1517 | switch (addr->sa_family) { |
a9f1b85e PS |
1518 | case AF_INET: { |
1519 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1520 | struct sockaddr_in *srv_addr4 = | |
1521 | (struct sockaddr_in *)&server->dstaddr; | |
1522 | ||
1523 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1524 | return false; |
4515148e | 1525 | break; |
a9f1b85e PS |
1526 | } |
1527 | case AF_INET6: { | |
1528 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1529 | struct sockaddr_in6 *srv_addr6 = | |
1530 | (struct sockaddr_in6 *)&server->dstaddr; | |
1531 | ||
4515148e | 1532 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1533 | &srv_addr6->sin6_addr)) |
4515148e | 1534 | return false; |
a9f1b85e | 1535 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1536 | return false; |
4515148e JL |
1537 | break; |
1538 | } | |
a9f1b85e PS |
1539 | default: |
1540 | WARN_ON(1); | |
1541 | return false; /* don't expect to be here */ | |
1542 | } | |
4515148e | 1543 | |
3eb9a889 BG |
1544 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1545 | return false; | |
1546 | ||
4515148e JL |
1547 | return true; |
1548 | } | |
1549 | ||
daf5b0b6 JL |
1550 | static bool |
1551 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1552 | { | |
1553 | unsigned int secFlags; | |
1554 | ||
1555 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1556 | secFlags = vol->secFlg; | |
1557 | else | |
1558 | secFlags = global_secflags | vol->secFlg; | |
1559 | ||
1560 | switch (server->secType) { | |
1561 | case LANMAN: | |
1562 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1563 | return false; | |
1564 | break; | |
1565 | case NTLMv2: | |
1566 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1567 | return false; | |
1568 | break; | |
1569 | case NTLM: | |
1570 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1571 | return false; | |
1572 | break; | |
1573 | case Kerberos: | |
1574 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1575 | return false; | |
1576 | break; | |
1577 | case RawNTLMSSP: | |
1578 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1579 | return false; | |
1580 | break; | |
1581 | default: | |
1582 | /* shouldn't happen */ | |
1583 | return false; | |
1584 | } | |
1585 | ||
25985edc | 1586 | /* now check if signing mode is acceptable */ |
daf5b0b6 JL |
1587 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
1588 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1589 | return false; | |
1590 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1591 | (server->secMode & | |
1592 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1593 | return false; | |
1594 | ||
1595 | return true; | |
1596 | } | |
1597 | ||
e7ddee90 | 1598 | static struct TCP_Server_Info * |
daf5b0b6 | 1599 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1600 | { |
e7ddee90 | 1601 | struct TCP_Server_Info *server; |
e7ddee90 | 1602 | |
3f9bcca7 | 1603 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1604 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
f1d0c998 RL |
1605 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
1606 | continue; | |
1607 | ||
3eb9a889 BG |
1608 | if (!match_address(server, addr, |
1609 | (struct sockaddr *)&vol->srcaddr)) | |
4515148e | 1610 | continue; |
1b20d672 | 1611 | |
4b886136 PS |
1612 | if (!match_port(server, addr)) |
1613 | continue; | |
1614 | ||
daf5b0b6 JL |
1615 | if (!match_security(server, vol)) |
1616 | continue; | |
1617 | ||
e7ddee90 | 1618 | ++server->srv_count; |
3f9bcca7 | 1619 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1620 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1621 | return server; |
1da177e4 | 1622 | } |
3f9bcca7 | 1623 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1624 | return NULL; |
1625 | } | |
1b20d672 | 1626 | |
14fbf50d | 1627 | static void |
e7ddee90 | 1628 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1629 | { |
e7ddee90 | 1630 | struct task_struct *task; |
1b20d672 | 1631 | |
3f9bcca7 | 1632 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1633 | if (--server->srv_count > 0) { |
3f9bcca7 | 1634 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1635 | return; |
1da177e4 | 1636 | } |
1b20d672 | 1637 | |
f1d0c998 RL |
1638 | put_net(cifs_net_ns(server)); |
1639 | ||
e7ddee90 | 1640 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1641 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1642 | |
c74093b6 JL |
1643 | cancel_delayed_work_sync(&server->echo); |
1644 | ||
e7ddee90 JL |
1645 | spin_lock(&GlobalMid_Lock); |
1646 | server->tcpStatus = CifsExiting; | |
1647 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1648 | |
d2b91521 | 1649 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1650 | cifs_fscache_release_client_cookie(server); |
1651 | ||
21e73393 SP |
1652 | kfree(server->session_key.response); |
1653 | server->session_key.response = NULL; | |
1654 | server->session_key.len = 0; | |
1655 | ||
e7ddee90 JL |
1656 | task = xchg(&server->tsk, NULL); |
1657 | if (task) | |
1658 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1659 | } |
1660 | ||
63c038c2 JL |
1661 | static struct TCP_Server_Info * |
1662 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1663 | { | |
1664 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1665 | struct sockaddr_storage addr; |
63c038c2 JL |
1666 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1667 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1668 | int rc; | |
1669 | ||
a9ac49d3 | 1670 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1671 | |
b6b38f70 | 1672 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1673 | |
1e68b2b2 | 1674 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1675 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1676 | volume_info->UNCip, | |
67b7626a | 1677 | strlen(volume_info->UNCip), |
50d97160 | 1678 | volume_info->port); |
1e68b2b2 | 1679 | if (!rc) { |
63c038c2 JL |
1680 | /* we failed translating address */ |
1681 | rc = -EINVAL; | |
1682 | goto out_err; | |
1683 | } | |
63c038c2 JL |
1684 | } else if (volume_info->UNCip) { |
1685 | /* BB using ip addr as tcp_ses name to connect to the | |
1686 | DFS root below */ | |
b6b38f70 | 1687 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1688 | rc = -EINVAL; |
1689 | goto out_err; | |
1690 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1691 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1692 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1693 | rc = -EINVAL; |
1694 | goto out_err; | |
1695 | } | |
1696 | ||
1697 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1698 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1699 | if (tcp_ses) |
1700 | return tcp_ses; | |
1701 | ||
1702 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1703 | if (!tcp_ses) { | |
1704 | rc = -ENOMEM; | |
1705 | goto out_err; | |
1706 | } | |
1707 | ||
d2b91521 SP |
1708 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1709 | if (rc) { | |
1710 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1711 | goto out_err; | |
1712 | } | |
1713 | ||
f1d0c998 | 1714 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1715 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1716 | if (IS_ERR(tcp_ses->hostname)) { | |
1717 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1718 | goto out_err_crypto_release; |
63c038c2 JL |
1719 | } |
1720 | ||
1721 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1722 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1723 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1724 | atomic_set(&tcp_ses->inFlight, 0); |
1725 | init_waitqueue_head(&tcp_ses->response_q); | |
1726 | init_waitqueue_head(&tcp_ses->request_q); | |
1727 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1728 | mutex_init(&tcp_ses->srv_mutex); | |
1729 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1730 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1731 | memcpy(tcp_ses->server_RFC1001_name, | |
1732 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1733 | tcp_ses->session_estab = false; |
63c038c2 | 1734 | tcp_ses->sequence_number = 0; |
fda35943 | 1735 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1736 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1737 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1738 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1739 | |
1740 | /* | |
1741 | * at this point we are the only ones with the pointer | |
1742 | * to the struct since the kernel thread not created yet | |
1743 | * no need to spinlock this init of tcpStatus or srv_count | |
1744 | */ | |
1745 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1746 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1747 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1748 | ++tcp_ses->srv_count; |
1749 | ||
a9ac49d3 | 1750 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1751 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1752 | /* BB should we allow ipv6 on port 139? */ |
1753 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1754 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1755 | sizeof(struct sockaddr_in6)); | |
1756 | } else | |
1757 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1758 | sizeof(struct sockaddr_in)); | |
1759 | ||
1760 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1761 | if (rc < 0) { |
b6b38f70 | 1762 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1763 | goto out_err_crypto_release; |
63c038c2 JL |
1764 | } |
1765 | ||
1766 | /* | |
1767 | * since we're in a cifs function already, we know that | |
1768 | * this will succeed. No need for try_module_get(). | |
1769 | */ | |
1770 | __module_get(THIS_MODULE); | |
1771 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1772 | tcp_ses, "cifsd"); | |
1773 | if (IS_ERR(tcp_ses->tsk)) { | |
1774 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1775 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1776 | module_put(THIS_MODULE); |
f7c5445a | 1777 | goto out_err_crypto_release; |
63c038c2 | 1778 | } |
fd88ce93 | 1779 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1780 | |
1781 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1782 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1783 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1784 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1785 | |
488f1d2d SJ |
1786 | cifs_fscache_get_client_cookie(tcp_ses); |
1787 | ||
c74093b6 JL |
1788 | /* queue echo request delayed work */ |
1789 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1790 | ||
63c038c2 JL |
1791 | return tcp_ses; |
1792 | ||
f7c5445a | 1793 | out_err_crypto_release: |
d2b91521 SP |
1794 | cifs_crypto_shash_release(tcp_ses); |
1795 | ||
f1d0c998 RL |
1796 | put_net(cifs_net_ns(tcp_ses)); |
1797 | ||
63c038c2 JL |
1798 | out_err: |
1799 | if (tcp_ses) { | |
8347a5cd SF |
1800 | if (!IS_ERR(tcp_ses->hostname)) |
1801 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1802 | if (tcp_ses->ssocket) |
1803 | sock_release(tcp_ses->ssocket); | |
1804 | kfree(tcp_ses); | |
1805 | } | |
1806 | return ERR_PTR(rc); | |
1807 | } | |
1808 | ||
14fbf50d | 1809 | static struct cifsSesInfo * |
4ff67b72 | 1810 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1811 | { |
14fbf50d | 1812 | struct cifsSesInfo *ses; |
dea570e0 | 1813 | |
3f9bcca7 | 1814 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 JL |
1815 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
1816 | switch (server->secType) { | |
1817 | case Kerberos: | |
3e4b3e1f | 1818 | if (vol->cred_uid != ses->cred_uid) |
4ff67b72 JL |
1819 | continue; |
1820 | break; | |
1821 | default: | |
1822 | /* anything else takes username/password */ | |
8727c8a8 SF |
1823 | if (ses->user_name == NULL) |
1824 | continue; | |
1825 | if (strncmp(ses->user_name, vol->username, | |
4ff67b72 JL |
1826 | MAX_USERNAME_SIZE)) |
1827 | continue; | |
1828 | if (strlen(vol->username) != 0 && | |
24e6cf92 | 1829 | ses->password != NULL && |
fc87a406 JL |
1830 | strncmp(ses->password, |
1831 | vol->password ? vol->password : "", | |
4ff67b72 JL |
1832 | MAX_PASSWORD_SIZE)) |
1833 | continue; | |
1834 | } | |
14fbf50d | 1835 | ++ses->ses_count; |
3f9bcca7 | 1836 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1837 | return ses; |
1838 | } | |
3f9bcca7 | 1839 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1840 | return NULL; |
1841 | } | |
dea570e0 | 1842 | |
14fbf50d JL |
1843 | static void |
1844 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1845 | { | |
1846 | int xid; | |
1847 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1848 | |
36988c76 | 1849 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1850 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1851 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1852 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1853 | return; |
1854 | } | |
dea570e0 | 1855 | |
14fbf50d | 1856 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1857 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1858 | |
14fbf50d JL |
1859 | if (ses->status == CifsGood) { |
1860 | xid = GetXid(); | |
1861 | CIFSSMBLogoff(xid, ses); | |
1862 | _FreeXid(xid); | |
1863 | } | |
1864 | sesInfoFree(ses); | |
1865 | cifs_put_tcp_session(server); | |
1866 | } | |
dea570e0 | 1867 | |
d9b94201 SF |
1868 | static bool warned_on_ntlm; /* globals init to false automatically */ |
1869 | ||
36988c76 JL |
1870 | static struct cifsSesInfo * |
1871 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1872 | { | |
1873 | int rc = -ENOMEM, xid; | |
1874 | struct cifsSesInfo *ses; | |
a9f1b85e PS |
1875 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1876 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1877 | |
1878 | xid = GetXid(); | |
1879 | ||
4ff67b72 | 1880 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1881 | if (ses) { |
1882 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1883 | ||
36988c76 | 1884 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1885 | rc = cifs_negotiate_protocol(xid, ses); |
1886 | if (rc) { | |
1887 | mutex_unlock(&ses->session_mutex); | |
1888 | /* problem -- put our ses reference */ | |
1889 | cifs_put_smb_ses(ses); | |
1890 | FreeXid(xid); | |
1891 | return ERR_PTR(rc); | |
1892 | } | |
36988c76 JL |
1893 | if (ses->need_reconnect) { |
1894 | cFYI(1, "Session needs reconnect"); | |
1895 | rc = cifs_setup_session(xid, ses, | |
1896 | volume_info->local_nls); | |
1897 | if (rc) { | |
1898 | mutex_unlock(&ses->session_mutex); | |
1899 | /* problem -- put our reference */ | |
1900 | cifs_put_smb_ses(ses); | |
1901 | FreeXid(xid); | |
1902 | return ERR_PTR(rc); | |
1903 | } | |
1904 | } | |
1905 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1906 | |
1907 | /* existing SMB ses has a server reference already */ | |
1908 | cifs_put_tcp_session(server); | |
36988c76 JL |
1909 | FreeXid(xid); |
1910 | return ses; | |
1911 | } | |
1912 | ||
1913 | cFYI(1, "Existing smb sess not found"); | |
1914 | ses = sesInfoAlloc(); | |
1915 | if (ses == NULL) | |
1916 | goto get_ses_fail; | |
1917 | ||
1918 | /* new SMB session uses our server ref */ | |
1919 | ses->server = server; | |
a9f1b85e PS |
1920 | if (server->dstaddr.ss_family == AF_INET6) |
1921 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 1922 | else |
a9f1b85e | 1923 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 1924 | |
8727c8a8 SF |
1925 | if (volume_info->username) { |
1926 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
1927 | if (!ses->user_name) | |
1928 | goto get_ses_fail; | |
1929 | } | |
36988c76 JL |
1930 | |
1931 | /* volume_info->password freed at unmount */ | |
1932 | if (volume_info->password) { | |
1933 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1934 | if (!ses->password) | |
1935 | goto get_ses_fail; | |
1936 | } | |
1937 | if (volume_info->domainname) { | |
d3686d54 SP |
1938 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
1939 | if (!ses->domainName) | |
1940 | goto get_ses_fail; | |
36988c76 | 1941 | } |
3e4b3e1f | 1942 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 1943 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
1944 | |
1945 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
1946 | supported for many years, time to update default security mechanism */ | |
1947 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
1948 | warned_on_ntlm = true; | |
1949 | cERROR(1, "default security mechanism requested. The default " | |
1950 | "security mechanism will be upgraded from ntlm to " | |
1951 | "ntlmv2 in kernel release 2.6.41"); | |
1952 | } | |
36988c76 JL |
1953 | ses->overrideSecFlg = volume_info->secFlg; |
1954 | ||
1955 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
1956 | rc = cifs_negotiate_protocol(xid, ses); |
1957 | if (!rc) | |
1958 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 1959 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 1960 | if (rc) |
36988c76 JL |
1961 | goto get_ses_fail; |
1962 | ||
1963 | /* success, put it on the list */ | |
3f9bcca7 | 1964 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 1965 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 1966 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
1967 | |
1968 | FreeXid(xid); | |
1969 | return ses; | |
1970 | ||
1971 | get_ses_fail: | |
1972 | sesInfoFree(ses); | |
1973 | FreeXid(xid); | |
1974 | return ERR_PTR(rc); | |
1975 | } | |
1976 | ||
f1987b44 JL |
1977 | static struct cifsTconInfo * |
1978 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
1979 | { | |
1980 | struct list_head *tmp; | |
1981 | struct cifsTconInfo *tcon; | |
1982 | ||
3f9bcca7 | 1983 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1984 | list_for_each(tmp, &ses->tcon_list) { |
1985 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
1986 | if (tcon->tidStatus == CifsExiting) | |
1987 | continue; | |
1988 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
dea570e0 SF |
1989 | continue; |
1990 | ||
f1987b44 | 1991 | ++tcon->tc_count; |
3f9bcca7 | 1992 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1993 | return tcon; |
1da177e4 | 1994 | } |
3f9bcca7 | 1995 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1996 | return NULL; |
1997 | } | |
1998 | ||
f1987b44 JL |
1999 | static void |
2000 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
2001 | { | |
2002 | int xid; | |
2003 | struct cifsSesInfo *ses = tcon->ses; | |
2004 | ||
d00c28de | 2005 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2006 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2007 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2008 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2009 | return; |
2010 | } | |
2011 | ||
2012 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2013 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2014 | |
2015 | xid = GetXid(); | |
2016 | CIFSSMBTDis(xid, tcon); | |
2017 | _FreeXid(xid); | |
2018 | ||
d03382ce | 2019 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2020 | tconInfoFree(tcon); |
f1987b44 JL |
2021 | cifs_put_smb_ses(ses); |
2022 | } | |
2023 | ||
d00c28de JL |
2024 | static struct cifsTconInfo * |
2025 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
2026 | { | |
2027 | int rc, xid; | |
2028 | struct cifsTconInfo *tcon; | |
2029 | ||
2030 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2031 | if (tcon) { | |
2032 | cFYI(1, "Found match on UNC path"); | |
2033 | /* existing tcon already has a reference */ | |
2034 | cifs_put_smb_ses(ses); | |
2035 | if (tcon->seal != volume_info->seal) | |
2036 | cERROR(1, "transport encryption setting " | |
2037 | "conflicts with existing tid"); | |
2038 | return tcon; | |
2039 | } | |
2040 | ||
2041 | tcon = tconInfoAlloc(); | |
2042 | if (tcon == NULL) { | |
2043 | rc = -ENOMEM; | |
2044 | goto out_fail; | |
2045 | } | |
2046 | ||
2047 | tcon->ses = ses; | |
2048 | if (volume_info->password) { | |
2049 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2050 | if (!tcon->password) { | |
2051 | rc = -ENOMEM; | |
2052 | goto out_fail; | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2057 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2058 | cERROR(1, "Missing share name"); | |
2059 | rc = -ENODEV; | |
2060 | goto out_fail; | |
2061 | } | |
2062 | ||
2063 | /* BB Do we need to wrap session_mutex around | |
2064 | * this TCon call and Unix SetFS as | |
2065 | * we do on SessSetup and reconnect? */ | |
2066 | xid = GetXid(); | |
2067 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2068 | FreeXid(xid); | |
2069 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2070 | if (rc) | |
2071 | goto out_fail; | |
2072 | ||
2073 | if (volume_info->nodfs) { | |
2074 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2075 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2076 | } | |
2077 | tcon->seal = volume_info->seal; | |
2078 | /* we can have only one retry value for a connection | |
2079 | to a share so for resources mounted more than once | |
2080 | to the same server share the last value passed in | |
2081 | for the retry flag is used */ | |
2082 | tcon->retry = volume_info->retry; | |
2083 | tcon->nocase = volume_info->nocase; | |
2084 | tcon->local_lease = volume_info->local_lease; | |
2085 | ||
3f9bcca7 | 2086 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2087 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2088 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2089 | |
d03382ce SJ |
2090 | cifs_fscache_get_super_cookie(tcon); |
2091 | ||
d00c28de JL |
2092 | return tcon; |
2093 | ||
2094 | out_fail: | |
2095 | tconInfoFree(tcon); | |
2096 | return ERR_PTR(rc); | |
2097 | } | |
2098 | ||
9d002df4 JL |
2099 | void |
2100 | cifs_put_tlink(struct tcon_link *tlink) | |
2101 | { | |
2102 | if (!tlink || IS_ERR(tlink)) | |
2103 | return; | |
2104 | ||
2105 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2106 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2107 | tlink->tl_time = jiffies; | |
2108 | return; | |
2109 | } | |
2110 | ||
2111 | if (!IS_ERR(tlink_tcon(tlink))) | |
2112 | cifs_put_tcon(tlink_tcon(tlink)); | |
2113 | kfree(tlink); | |
2114 | return; | |
2115 | } | |
d00c28de | 2116 | |
1da177e4 | 2117 | int |
50c2f753 SF |
2118 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
2119 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 2120 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2121 | { |
2122 | char *temp_unc; | |
2123 | int rc = 0; | |
2124 | ||
2125 | *pnum_referrals = 0; | |
366781c1 | 2126 | *preferrals = NULL; |
1da177e4 LT |
2127 | |
2128 | if (pSesInfo->ipc_tid == 0) { | |
2129 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2130 | strnlen(pSesInfo->serverName, |
2131 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2132 | + 1 + 4 /* slash IPC$ */ + 2, |
2133 | GFP_KERNEL); | |
2134 | if (temp_unc == NULL) | |
2135 | return -ENOMEM; | |
2136 | temp_unc[0] = '\\'; | |
2137 | temp_unc[1] = '\\'; | |
2138 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2139 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2140 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2141 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2142 | kfree(temp_unc); |
2143 | } | |
2144 | if (rc == 0) | |
c2cf07d5 | 2145 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2146 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2147 | /* BB map targetUNCs to dfs_info3 structures, here or |
2148 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2149 | |
2150 | return rc; | |
2151 | } | |
2152 | ||
09e50d55 JL |
2153 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2154 | static struct lock_class_key cifs_key[2]; | |
2155 | static struct lock_class_key cifs_slock_key[2]; | |
2156 | ||
2157 | static inline void | |
2158 | cifs_reclassify_socket4(struct socket *sock) | |
2159 | { | |
2160 | struct sock *sk = sock->sk; | |
2161 | BUG_ON(sock_owned_by_user(sk)); | |
2162 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2163 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2164 | } | |
2165 | ||
2166 | static inline void | |
2167 | cifs_reclassify_socket6(struct socket *sock) | |
2168 | { | |
2169 | struct sock *sk = sock->sk; | |
2170 | BUG_ON(sock_owned_by_user(sk)); | |
2171 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2172 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2173 | } | |
2174 | #else | |
2175 | static inline void | |
2176 | cifs_reclassify_socket4(struct socket *sock) | |
2177 | { | |
2178 | } | |
2179 | ||
2180 | static inline void | |
2181 | cifs_reclassify_socket6(struct socket *sock) | |
2182 | { | |
2183 | } | |
2184 | #endif | |
2185 | ||
1da177e4 | 2186 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2187 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2188 | { |
50c2f753 | 2189 | unsigned int i, j; |
1da177e4 | 2190 | |
50c2f753 | 2191 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2192 | /* mask a nibble at a time and encode */ |
2193 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2194 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2195 | j += 2; |
1da177e4 LT |
2196 | } |
2197 | ||
2198 | } | |
2199 | ||
3eb9a889 BG |
2200 | static int |
2201 | bind_socket(struct TCP_Server_Info *server) | |
2202 | { | |
2203 | int rc = 0; | |
2204 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2205 | /* Bind to the specified local IP address */ | |
2206 | struct socket *socket = server->ssocket; | |
2207 | rc = socket->ops->bind(socket, | |
2208 | (struct sockaddr *) &server->srcaddr, | |
2209 | sizeof(server->srcaddr)); | |
2210 | if (rc < 0) { | |
2211 | struct sockaddr_in *saddr4; | |
2212 | struct sockaddr_in6 *saddr6; | |
2213 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2214 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2215 | if (saddr6->sin6_family == AF_INET6) | |
2216 | cERROR(1, "cifs: " | |
2217 | "Failed to bind to: %pI6c, error: %d\n", | |
2218 | &saddr6->sin6_addr, rc); | |
2219 | else | |
2220 | cERROR(1, "cifs: " | |
2221 | "Failed to bind to: %pI4, error: %d\n", | |
2222 | &saddr4->sin_addr.s_addr, rc); | |
2223 | } | |
2224 | } | |
2225 | return rc; | |
2226 | } | |
1da177e4 LT |
2227 | |
2228 | static int | |
a9f1b85e | 2229 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2230 | { |
2231 | int rc = 0; | |
a9f1b85e PS |
2232 | /* |
2233 | * some servers require RFC1001 sessinit before sending | |
2234 | * negprot - BB check reconnection in case where second | |
2235 | * sessinit is sent but no second negprot | |
2236 | */ | |
2237 | struct rfc1002_session_packet *ses_init_buf; | |
2238 | struct smb_hdr *smb_buf; | |
2239 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2240 | GFP_KERNEL); | |
2241 | if (ses_init_buf) { | |
2242 | ses_init_buf->trailer.session_req.called_len = 32; | |
2243 | ||
2244 | if (server->server_RFC1001_name && | |
2245 | server->server_RFC1001_name[0] != 0) | |
2246 | rfc1002mangle(ses_init_buf->trailer. | |
2247 | session_req.called_name, | |
2248 | server->server_RFC1001_name, | |
2249 | RFC1001_NAME_LEN_WITH_NULL); | |
2250 | else | |
2251 | rfc1002mangle(ses_init_buf->trailer. | |
2252 | session_req.called_name, | |
2253 | DEFAULT_CIFS_CALLED_NAME, | |
2254 | RFC1001_NAME_LEN_WITH_NULL); | |
2255 | ||
2256 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2257 | ||
2258 | /* | |
2259 | * calling name ends in null (byte 16) from old smb | |
2260 | * convention. | |
2261 | */ | |
2262 | if (server->workstation_RFC1001_name && | |
2263 | server->workstation_RFC1001_name[0] != 0) | |
2264 | rfc1002mangle(ses_init_buf->trailer. | |
2265 | session_req.calling_name, | |
2266 | server->workstation_RFC1001_name, | |
2267 | RFC1001_NAME_LEN_WITH_NULL); | |
2268 | else | |
2269 | rfc1002mangle(ses_init_buf->trailer. | |
2270 | session_req.calling_name, | |
2271 | "LINUX_CIFS_CLNT", | |
2272 | RFC1001_NAME_LEN_WITH_NULL); | |
2273 | ||
2274 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2275 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2276 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2277 | ||
2278 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
2279 | smb_buf->smb_buf_length = 0x81000044; | |
2280 | rc = smb_send(server, smb_buf, 0x44); | |
2281 | kfree(ses_init_buf); | |
2282 | /* | |
2283 | * RFC1001 layer in at least one server | |
2284 | * requires very short break before negprot | |
2285 | * presumably because not expecting negprot | |
2286 | * to follow so fast. This is a simple | |
2287 | * solution that works without | |
2288 | * complicating the code and causes no | |
2289 | * significant slowing down on mount | |
2290 | * for everyone else | |
2291 | */ | |
2292 | usleep_range(1000, 2000); | |
2293 | } | |
2294 | /* | |
2295 | * else the negprot may still work without this | |
2296 | * even though malloc failed | |
2297 | */ | |
2298 | ||
2299 | return rc; | |
2300 | } | |
2301 | ||
2302 | static int | |
2303 | generic_ip_connect(struct TCP_Server_Info *server) | |
2304 | { | |
2305 | int rc = 0; | |
6da97910 | 2306 | __be16 sport; |
a9f1b85e | 2307 | int slen, sfamily; |
bcf4b106 | 2308 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2309 | struct sockaddr *saddr; |
2310 | ||
2311 | saddr = (struct sockaddr *) &server->dstaddr; | |
2312 | ||
2313 | if (server->dstaddr.ss_family == AF_INET6) { | |
2314 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2315 | slen = sizeof(struct sockaddr_in6); | |
2316 | sfamily = AF_INET6; | |
2317 | } else { | |
2318 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2319 | slen = sizeof(struct sockaddr_in); | |
2320 | sfamily = AF_INET; | |
2321 | } | |
1da177e4 | 2322 | |
bcf4b106 | 2323 | if (socket == NULL) { |
f1d0c998 RL |
2324 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2325 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2326 | if (rc < 0) { |
b6b38f70 | 2327 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2328 | server->ssocket = NULL; |
1da177e4 | 2329 | return rc; |
1da177e4 | 2330 | } |
bcf4b106 JL |
2331 | |
2332 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2333 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2334 | server->ssocket = socket; |
2335 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2336 | if (sfamily == AF_INET6) |
2337 | cifs_reclassify_socket6(socket); | |
2338 | else | |
2339 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2340 | } |
2341 | ||
3eb9a889 BG |
2342 | rc = bind_socket(server); |
2343 | if (rc < 0) | |
2344 | return rc; | |
2345 | ||
a9f1b85e PS |
2346 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2347 | if (rc < 0) { | |
2348 | cFYI(1, "Error %d connecting to server", rc); | |
bcf4b106 JL |
2349 | sock_release(socket); |
2350 | server->ssocket = NULL; | |
1da177e4 LT |
2351 | return rc; |
2352 | } | |
bcf4b106 | 2353 | |
bcf4b106 JL |
2354 | /* |
2355 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2356 | * the default. sock_setsockopt not used because it expects |
2357 | * user space buffer | |
bcf4b106 JL |
2358 | */ |
2359 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2360 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2361 | |
b387eaeb | 2362 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2363 | if (server->noautotune) { |
2364 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2365 | socket->sk->sk_sndbuf = 200 * 1024; | |
2366 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2367 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2368 | } |
1da177e4 | 2369 | |
6a5fa236 | 2370 | if (server->tcp_nodelay) { |
a9f1b85e | 2371 | int val = 1; |
6a5fa236 SF |
2372 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2373 | (char *)&val, sizeof(val)); | |
2374 | if (rc) | |
b6b38f70 | 2375 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2376 | } |
2377 | ||
b6b38f70 | 2378 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2379 | socket->sk->sk_sndbuf, |
b6b38f70 | 2380 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2381 | |
a9f1b85e PS |
2382 | if (sport == htons(RFC1001_PORT)) |
2383 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2384 | |
1da177e4 LT |
2385 | return rc; |
2386 | } | |
2387 | ||
2388 | static int | |
a9f1b85e | 2389 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2390 | { |
6da97910 | 2391 | __be16 *sport; |
a9f1b85e PS |
2392 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2393 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2394 | |
a9f1b85e PS |
2395 | if (server->dstaddr.ss_family == AF_INET6) |
2396 | sport = &addr6->sin6_port; | |
2397 | else | |
2398 | sport = &addr->sin_port; | |
1da177e4 | 2399 | |
a9f1b85e PS |
2400 | if (*sport == 0) { |
2401 | int rc; | |
1da177e4 | 2402 | |
a9f1b85e PS |
2403 | /* try with 445 port at first */ |
2404 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2405 | |
a9f1b85e | 2406 | rc = generic_ip_connect(server); |
1da177e4 | 2407 | if (rc >= 0) |
a9f1b85e | 2408 | return rc; |
6a5fa236 | 2409 | |
a9f1b85e PS |
2410 | /* if it failed, try with 139 port */ |
2411 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2412 | } |
2413 | ||
a9f1b85e | 2414 | return generic_ip_connect(server); |
1da177e4 LT |
2415 | } |
2416 | ||
50c2f753 SF |
2417 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2418 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2419 | { |
2420 | /* if we are reconnecting then should we check to see if | |
2421 | * any requested capabilities changed locally e.g. via | |
2422 | * remount but we can not do much about it here | |
2423 | * if they have (even if we could detect it by the following) | |
2424 | * Perhaps we could add a backpointer to array of sb from tcon | |
2425 | * or if we change to make all sb to same share the same | |
2426 | * sb as NFS - then we only have one backpointer to sb. | |
2427 | * What if we wanted to mount the server share twice once with | |
2428 | * and once without posixacls or posix paths? */ | |
2429 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2430 | |
c18c842b SF |
2431 | if (vol_info && vol_info->no_linux_ext) { |
2432 | tcon->fsUnixInfo.Capability = 0; | |
2433 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2434 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2435 | return; |
2436 | } else if (vol_info) | |
2437 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2438 | ||
2439 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2440 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2441 | return; |
2442 | } | |
50c2f753 | 2443 | |
fb8c4b14 | 2444 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2445 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
50c2f753 | 2446 | |
8af18971 SF |
2447 | /* check for reconnect case in which we do not |
2448 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2449 | if (vol_info == NULL) { |
50c2f753 | 2450 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2451 | originally at mount time */ |
2452 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2453 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2454 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2455 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2456 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2457 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2458 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2459 | cERROR(1, "possible reconnect error"); |
2460 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2461 | } |
8af18971 | 2462 | } |
50c2f753 | 2463 | |
8af18971 | 2464 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2465 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2466 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2467 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2468 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2469 | if (sb) |
8af18971 SF |
2470 | sb->s_flags |= MS_POSIXACL; |
2471 | } | |
2472 | ||
75865f8c | 2473 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2474 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2475 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2476 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2477 | if (sb) |
50c2f753 | 2478 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2479 | CIFS_MOUNT_POSIX_PATHS; |
2480 | } | |
50c2f753 | 2481 | |
984acfe1 SF |
2482 | /* We might be setting the path sep back to a different |
2483 | form if we are reconnecting and the server switched its | |
50c2f753 | 2484 | posix path capability for this share */ |
75865f8c | 2485 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2486 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2487 | |
2488 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2489 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2490 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2491 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2492 | } |
2493 | } | |
50c2f753 SF |
2494 | |
2495 | ||
b6b38f70 | 2496 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2497 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2498 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2499 | cFYI(1, "FCNTL cap"); |
75865f8c | 2500 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2501 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2502 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2503 | cFYI(1, "POSIX path cap"); |
75865f8c | 2504 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2505 | cFYI(1, "XATTR cap"); |
75865f8c | 2506 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2507 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2508 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2509 | cFYI(1, "very large read cap"); |
75865f8c | 2510 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2511 | cFYI(1, "very large write cap"); |
8af18971 SF |
2512 | #endif /* CIFS_DEBUG2 */ |
2513 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2514 | if (vol_info == NULL) { |
b6b38f70 | 2515 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2516 | } else |
b6b38f70 | 2517 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2518 | "with the server failed. Consider " |
2519 | "mounting with the Unix Extensions\n" | |
2520 | "disabled, if problems are found, " | |
2521 | "by specifying the nounix mount " | |
b6b38f70 | 2522 | "option."); |
5a44b319 | 2523 | |
8af18971 SF |
2524 | } |
2525 | } | |
2526 | } | |
2527 | ||
03a143c9 SF |
2528 | static void |
2529 | convert_delimiter(char *path, char delim) | |
2530 | { | |
2531 | int i; | |
c2d68ea6 | 2532 | char old_delim; |
03a143c9 SF |
2533 | |
2534 | if (path == NULL) | |
2535 | return; | |
2536 | ||
582d21e5 | 2537 | if (delim == '/') |
c2d68ea6 SF |
2538 | old_delim = '\\'; |
2539 | else | |
2540 | old_delim = '/'; | |
2541 | ||
03a143c9 | 2542 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2543 | if (path[i] == old_delim) |
03a143c9 SF |
2544 | path[i] = delim; |
2545 | } | |
2546 | } | |
2547 | ||
3b795210 SF |
2548 | static void setup_cifs_sb(struct smb_vol *pvolume_info, |
2549 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2550 | { |
2de970ff JL |
2551 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2552 | ||
3b795210 | 2553 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2554 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2555 | pvolume_info->rsize); | |
3b795210 SF |
2556 | cifs_sb->rsize = CIFSMaxBufSize; |
2557 | } else if ((pvolume_info->rsize) && | |
2558 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2559 | cifs_sb->rsize = pvolume_info->rsize; | |
2560 | else /* default */ | |
2561 | cifs_sb->rsize = CIFSMaxBufSize; | |
2562 | ||
2563 | if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) { | |
b6b38f70 JP |
2564 | cERROR(1, "wsize %d too large, using 4096 instead", |
2565 | pvolume_info->wsize); | |
3b795210 SF |
2566 | cifs_sb->wsize = 4096; |
2567 | } else if (pvolume_info->wsize) | |
2568 | cifs_sb->wsize = pvolume_info->wsize; | |
2569 | else | |
2570 | cifs_sb->wsize = min_t(const int, | |
2571 | PAGEVEC_SIZE * PAGE_CACHE_SIZE, | |
2572 | 127*1024); | |
2573 | /* old default of CIFSMaxBufSize was too small now | |
2574 | that SMB Write2 can send multiple pages in kvec. | |
2575 | RFC1001 does not describe what happens when frame | |
2576 | bigger than 128K is sent so use that as max in | |
2577 | conjunction with 52K kvec constraint on arch with 4K | |
2578 | page size */ | |
2579 | ||
2580 | if (cifs_sb->rsize < 2048) { | |
2581 | cifs_sb->rsize = 2048; | |
2582 | /* Windows ME may prefer this */ | |
b6b38f70 | 2583 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2584 | } |
2585 | /* calculate prepath */ | |
2586 | cifs_sb->prepath = pvolume_info->prepath; | |
2587 | if (cifs_sb->prepath) { | |
2588 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2589 | /* we can not convert the / to \ in the path | |
2590 | separators in the prefixpath yet because we do not | |
2591 | know (until reset_cifs_unix_caps is called later) | |
2592 | whether POSIX PATH CAP is available. We normalize | |
2593 | the / to \ after reset_cifs_unix_caps is called */ | |
2594 | pvolume_info->prepath = NULL; | |
2595 | } else | |
2596 | cifs_sb->prepathlen = 0; | |
2597 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2598 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2599 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2600 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2601 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2602 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2603 | |
6d20e840 SJ |
2604 | cifs_sb->actimeo = pvolume_info->actimeo; |
2605 | ||
3b795210 SF |
2606 | if (pvolume_info->noperm) |
2607 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2608 | if (pvolume_info->setuids) | |
2609 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2610 | if (pvolume_info->server_ino) | |
2611 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2612 | if (pvolume_info->remap) | |
2613 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2614 | if (pvolume_info->no_xattr) | |
2615 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2616 | if (pvolume_info->sfu_emul) | |
2617 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2618 | if (pvolume_info->nobrl) | |
2619 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2620 | if (pvolume_info->nostrictsync) |
4717bed6 | 2621 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2622 | if (pvolume_info->mand_lock) |
2623 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2624 | if (pvolume_info->cifs_acl) |
2625 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2626 | if (pvolume_info->override_uid) | |
2627 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2628 | if (pvolume_info->override_gid) | |
2629 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2630 | if (pvolume_info->dynperm) | |
2631 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2632 | if (pvolume_info->fsc) |
2633 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2634 | if (pvolume_info->multiuser) |
2635 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2636 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
2637 | if (pvolume_info->strict_io) |
2638 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 2639 | if (pvolume_info->direct_io) { |
b6b38f70 | 2640 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2641 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2642 | } | |
736a3320 SM |
2643 | if (pvolume_info->mfsymlinks) { |
2644 | if (pvolume_info->sfu_emul) { | |
2645 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2646 | "mount option is used"); | |
2647 | } else { | |
2648 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2649 | } | |
2650 | } | |
3b795210 SF |
2651 | |
2652 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2653 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2654 | "mount option supported"); | |
b1c8d2b4 JL |
2655 | } |
2656 | ||
e4cce94c IM |
2657 | static int |
2658 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2659 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2660 | { | |
2661 | int rc; | |
e4cce94c IM |
2662 | FILE_ALL_INFO *pfile_info; |
2663 | ||
e4cce94c IM |
2664 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2665 | if (pfile_info == NULL) | |
2666 | return -ENOMEM; | |
2667 | ||
2668 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2669 | 0 /* not legacy */, cifs_sb->local_nls, | |
2670 | cifs_sb->mnt_cifs_flags & | |
2671 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2672 | kfree(pfile_info); | |
2673 | return rc; | |
2674 | } | |
2675 | ||
1bfe73c2 IM |
2676 | static void |
2677 | cleanup_volume_info(struct smb_vol **pvolume_info) | |
2678 | { | |
2679 | struct smb_vol *volume_info; | |
2680 | ||
ad6cca6d | 2681 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2682 | return; |
2683 | ||
2684 | volume_info = *pvolume_info; | |
2685 | kzfree(volume_info->password); | |
2686 | kfree(volume_info->UNC); | |
2687 | kfree(volume_info->prepath); | |
2688 | kfree(volume_info); | |
2689 | *pvolume_info = NULL; | |
2690 | return; | |
2691 | } | |
2692 | ||
2d6d589d | 2693 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2694 | /* build_path_to_root returns full path to root when |
2695 | * we do not have an exiting connection (tcon) */ | |
2696 | static char * | |
2697 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2698 | const struct cifs_sb_info *cifs_sb) | |
2699 | { | |
2700 | char *full_path; | |
2701 | ||
2702 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2703 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2704 | if (full_path == NULL) | |
2705 | return ERR_PTR(-ENOMEM); | |
2706 | ||
2707 | strncpy(full_path, volume_info->UNC, unc_len); | |
2708 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2709 | int i; | |
2710 | for (i = 0; i < unc_len; i++) { | |
2711 | if (full_path[i] == '\\') | |
2712 | full_path[i] = '/'; | |
2713 | } | |
2714 | } | |
2715 | ||
2716 | if (cifs_sb->prepathlen) | |
2717 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2718 | cifs_sb->prepathlen); | |
2719 | ||
2720 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2721 | return full_path; | |
2722 | } | |
2d6d589d | 2723 | #endif |
1bfe73c2 | 2724 | |
1da177e4 LT |
2725 | int |
2726 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
1bfe73c2 | 2727 | char *mount_data_global, const char *devname) |
1da177e4 | 2728 | { |
a2934c7b | 2729 | int rc; |
1da177e4 | 2730 | int xid; |
7586b765 | 2731 | struct smb_vol *volume_info; |
a2934c7b JL |
2732 | struct cifsSesInfo *pSesInfo; |
2733 | struct cifsTconInfo *tcon; | |
2734 | struct TCP_Server_Info *srvTcp; | |
e4cce94c | 2735 | char *full_path; |
2d6d589d | 2736 | char *mount_data = mount_data_global; |
9d002df4 | 2737 | struct tcon_link *tlink; |
2d6d589d | 2738 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2739 | struct dfs_info3_param *referrals = NULL; |
2740 | unsigned int num_referrals = 0; | |
5c2503a8 | 2741 | int referral_walks_count = 0; |
1bfe73c2 | 2742 | try_mount_again: |
2d6d589d | 2743 | #endif |
a2934c7b JL |
2744 | rc = 0; |
2745 | tcon = NULL; | |
2746 | pSesInfo = NULL; | |
2747 | srvTcp = NULL; | |
1bfe73c2 | 2748 | full_path = NULL; |
9d002df4 | 2749 | tlink = NULL; |
1da177e4 LT |
2750 | |
2751 | xid = GetXid(); | |
2752 | ||
7586b765 JL |
2753 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2754 | if (!volume_info) { | |
2755 | rc = -ENOMEM; | |
2756 | goto out; | |
2757 | } | |
50c2f753 | 2758 | |
7586b765 | 2759 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) { |
70fe7dc0 JL |
2760 | rc = -EINVAL; |
2761 | goto out; | |
1da177e4 LT |
2762 | } |
2763 | ||
7586b765 | 2764 | if (volume_info->nullauth) { |
b6b38f70 | 2765 | cFYI(1, "null user"); |
7586b765 JL |
2766 | volume_info->username = ""; |
2767 | } else if (volume_info->username) { | |
1da177e4 | 2768 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2769 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2770 | } else { |
bf820679 | 2771 | cifserror("No username specified"); |
50c2f753 SF |
2772 | /* In userspace mount helper we can get user name from alternate |
2773 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2774 | rc = -EINVAL; |
2775 | goto out; | |
1da177e4 LT |
2776 | } |
2777 | ||
1da177e4 | 2778 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2779 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2780 | /* load_nls_default cannot return null */ |
2781 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2782 | } else { |
a5fc4ce0 JL |
2783 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2784 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2785 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2786 | volume_info->iocharset); | |
70fe7dc0 JL |
2787 | rc = -ELIBACC; |
2788 | goto out; | |
1da177e4 LT |
2789 | } |
2790 | } | |
a5fc4ce0 | 2791 | cifs_sb->local_nls = volume_info->local_nls; |
1da177e4 | 2792 | |
63c038c2 | 2793 | /* get a reference to a tcp session */ |
7586b765 | 2794 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
2795 | if (IS_ERR(srvTcp)) { |
2796 | rc = PTR_ERR(srvTcp); | |
2797 | goto out; | |
1da177e4 LT |
2798 | } |
2799 | ||
36988c76 JL |
2800 | /* get a reference to a SMB session */ |
2801 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
2802 | if (IS_ERR(pSesInfo)) { | |
2803 | rc = PTR_ERR(pSesInfo); | |
2804 | pSesInfo = NULL; | |
2805 | goto mount_fail_check; | |
1da177e4 | 2806 | } |
50c2f753 | 2807 | |
d00c28de JL |
2808 | setup_cifs_sb(volume_info, cifs_sb); |
2809 | if (pSesInfo->capabilities & CAP_LARGE_FILES) | |
2810 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2811 | else | |
2812 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 2813 | |
8af18971 | 2814 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
2815 | sb->s_time_gran = 100; |
2816 | ||
d00c28de JL |
2817 | /* search for existing tcon to this server share */ |
2818 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
2819 | if (IS_ERR(tcon)) { | |
2820 | rc = PTR_ERR(tcon); | |
2821 | tcon = NULL; | |
1bfe73c2 | 2822 | goto remote_path_check; |
d00c28de | 2823 | } |
1bfe73c2 | 2824 | |
d82c2df5 SF |
2825 | /* do not care if following two calls succeed - informational */ |
2826 | if (!tcon->ipc) { | |
2827 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
2828 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
2829 | } | |
03a143c9 | 2830 | |
d82c2df5 SF |
2831 | /* tell server which Unix caps we support */ |
2832 | if (tcon->ses->capabilities & CAP_UNIX) | |
2833 | /* reset of caps checks mount to see if unix extensions | |
2834 | disabled for just this mount */ | |
7586b765 | 2835 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
d82c2df5 SF |
2836 | else |
2837 | tcon->unix_ext = 0; /* server does not support them */ | |
c18c842b | 2838 | |
d82c2df5 SF |
2839 | /* convert forward to back slashes in prepath here if needed */ |
2840 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2841 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 2842 | |
d82c2df5 SF |
2843 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
2844 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 2845 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 2846 | } |
d82c2df5 SF |
2847 | if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X)) |
2848 | cifs_sb->wsize = min(cifs_sb->wsize, | |
2849 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
2850 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) | |
2851 | cifs_sb->rsize = min(cifs_sb->rsize, | |
2852 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 2853 | |
1bfe73c2 IM |
2854 | remote_path_check: |
2855 | /* check if a whole path (including prepath) is not remote */ | |
70945643 | 2856 | if (!rc && tcon) { |
e4cce94c | 2857 | /* build_path_to_root works only when we have a valid tcon */ |
7d161b7f | 2858 | full_path = cifs_build_path_to_root(cifs_sb, tcon); |
e4cce94c IM |
2859 | if (full_path == NULL) { |
2860 | rc = -ENOMEM; | |
2861 | goto mount_fail_check; | |
2862 | } | |
2863 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 2864 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
2865 | kfree(full_path); |
2866 | goto mount_fail_check; | |
2867 | } | |
2868 | kfree(full_path); | |
2869 | } | |
2870 | ||
1bfe73c2 IM |
2871 | /* get referral if needed */ |
2872 | if (rc == -EREMOTE) { | |
d036f50f | 2873 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
2874 | if (referral_walks_count > MAX_NESTED_LINKS) { |
2875 | /* | |
2876 | * BB: when we implement proper loop detection, | |
2877 | * we will remove this check. But now we need it | |
2878 | * to prevent an indefinite loop if 'DFS tree' is | |
2879 | * misconfigured (i.e. has loops). | |
2880 | */ | |
2881 | rc = -ELOOP; | |
2882 | goto mount_fail_check; | |
2883 | } | |
1bfe73c2 IM |
2884 | /* convert forward to back slashes in prepath here if needed */ |
2885 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2886 | convert_delimiter(cifs_sb->prepath, | |
2887 | CIFS_DIR_SEP(cifs_sb)); | |
2888 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2889 | if (IS_ERR(full_path)) { | |
2890 | rc = PTR_ERR(full_path); | |
2891 | goto mount_fail_check; | |
2892 | } | |
2893 | ||
b6b38f70 | 2894 | cFYI(1, "Getting referral for: %s", full_path); |
1bfe73c2 IM |
2895 | rc = get_dfs_path(xid, pSesInfo , full_path + 1, |
2896 | cifs_sb->local_nls, &num_referrals, &referrals, | |
2897 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2898 | if (!rc && num_referrals > 0) { | |
2899 | char *fake_devname = NULL; | |
2900 | ||
2901 | if (mount_data != mount_data_global) | |
2902 | kfree(mount_data); | |
7b91e266 | 2903 | |
1bfe73c2 IM |
2904 | mount_data = cifs_compose_mount_options( |
2905 | cifs_sb->mountdata, full_path + 1, | |
2906 | referrals, &fake_devname); | |
7b91e266 | 2907 | |
1bfe73c2 | 2908 | free_dfs_info_array(referrals, num_referrals); |
7b91e266 JL |
2909 | kfree(fake_devname); |
2910 | kfree(full_path); | |
2911 | ||
2912 | if (IS_ERR(mount_data)) { | |
2913 | rc = PTR_ERR(mount_data); | |
2914 | mount_data = NULL; | |
2915 | goto mount_fail_check; | |
2916 | } | |
1bfe73c2 IM |
2917 | |
2918 | if (tcon) | |
2919 | cifs_put_tcon(tcon); | |
2920 | else if (pSesInfo) | |
2921 | cifs_put_smb_ses(pSesInfo); | |
2922 | ||
2923 | cleanup_volume_info(&volume_info); | |
5c2503a8 | 2924 | referral_walks_count++; |
a2934c7b | 2925 | FreeXid(xid); |
1bfe73c2 IM |
2926 | goto try_mount_again; |
2927 | } | |
d036f50f SF |
2928 | #else /* No DFS support, return error on mount */ |
2929 | rc = -EOPNOTSUPP; | |
2930 | #endif | |
1bfe73c2 IM |
2931 | } |
2932 | ||
9d002df4 JL |
2933 | if (rc) |
2934 | goto mount_fail_check; | |
2935 | ||
2936 | /* now, hang the tcon off of the superblock */ | |
2937 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
2938 | if (tlink == NULL) { | |
2939 | rc = -ENOMEM; | |
2940 | goto mount_fail_check; | |
2941 | } | |
2942 | ||
b647c35f | 2943 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
2944 | tlink->tl_tcon = tcon; |
2945 | tlink->tl_time = jiffies; | |
2946 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
2947 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
2948 | ||
b647c35f | 2949 | cifs_sb->master_tlink = tlink; |
9d002df4 | 2950 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 2951 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 2952 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 2953 | |
2de970ff JL |
2954 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
2955 | TLINK_IDLE_EXPIRE); | |
2956 | ||
1bfe73c2 IM |
2957 | mount_fail_check: |
2958 | /* on error free sesinfo and tcon struct if needed */ | |
2959 | if (rc) { | |
2960 | if (mount_data != mount_data_global) | |
2961 | kfree(mount_data); | |
2962 | /* If find_unc succeeded then rc == 0 so we can not end */ | |
25985edc | 2963 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
2964 | if (tcon) |
2965 | cifs_put_tcon(tcon); | |
2966 | else if (pSesInfo) | |
2967 | cifs_put_smb_ses(pSesInfo); | |
2968 | else | |
2969 | cifs_put_tcp_session(srvTcp); | |
2970 | goto out; | |
2971 | } | |
2972 | ||
7586b765 | 2973 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
2974 | (in which case it is not needed anymore) but when new sesion is created |
2975 | the password ptr is put in the new session structure (in which case the | |
2976 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
2977 | out: |
2978 | /* zero out password before freeing */ | |
1bfe73c2 | 2979 | cleanup_volume_info(&volume_info); |
1da177e4 LT |
2980 | FreeXid(xid); |
2981 | return rc; | |
2982 | } | |
2983 | ||
1da177e4 LT |
2984 | int |
2985 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
2986 | const char *tree, struct cifsTconInfo *tcon, | |
2987 | const struct nls_table *nls_codepage) | |
2988 | { | |
2989 | struct smb_hdr *smb_buffer; | |
2990 | struct smb_hdr *smb_buffer_response; | |
2991 | TCONX_REQ *pSMB; | |
2992 | TCONX_RSP *pSMBr; | |
2993 | unsigned char *bcc_ptr; | |
2994 | int rc = 0; | |
690c522f JL |
2995 | int length; |
2996 | __u16 bytes_left, count; | |
1da177e4 LT |
2997 | |
2998 | if (ses == NULL) | |
2999 | return -EIO; | |
3000 | ||
3001 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3002 | if (smb_buffer == NULL) |
1da177e4 | 3003 | return -ENOMEM; |
ca43e3be | 3004 | |
1da177e4 LT |
3005 | smb_buffer_response = smb_buffer; |
3006 | ||
3007 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3008 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3009 | |
3010 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3011 | smb_buffer->Uid = ses->Suid; |
3012 | pSMB = (TCONX_REQ *) smb_buffer; | |
3013 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3014 | ||
3015 | pSMB->AndXCommand = 0xFF; | |
3016 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3017 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 3018 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 3019 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3020 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3021 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3022 | /* already aligned so no need to do it below */ |
eeac8047 | 3023 | } else { |
540b2e37 | 3024 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3025 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3026 | specified as required (when that support is added to | |
3027 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3028 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3029 | by Samba (not sure whether other servers allow |
3030 | NTLMv2 password here) */ | |
7c7b25bc | 3031 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3032 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3033 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3034 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
4e53a3fb JL |
3035 | ses->server->secMode & |
3036 | SECMODE_PW_ENCRYPT ? true : false, | |
3037 | bcc_ptr); | |
7c7b25bc SF |
3038 | else |
3039 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 SP |
3040 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
3041 | bcc_ptr); | |
eeac8047 | 3042 | |
540b2e37 | 3043 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3044 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3045 | /* must align unicode strings */ |
3046 | *bcc_ptr = 0; /* null byte password */ | |
3047 | bcc_ptr++; | |
3048 | } | |
eeac8047 | 3049 | } |
1da177e4 | 3050 | |
50c2f753 | 3051 | if (ses->server->secMode & |
a878fb22 | 3052 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3053 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3054 | ||
3055 | if (ses->capabilities & CAP_STATUS32) { | |
3056 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3057 | } | |
3058 | if (ses->capabilities & CAP_DFS) { | |
3059 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3060 | } | |
3061 | if (ses->capabilities & CAP_UNICODE) { | |
3062 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3063 | length = | |
50c2f753 SF |
3064 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3065 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3066 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3067 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3068 | bcc_ptr += 2; /* skip trailing null */ |
3069 | } else { /* ASCII */ | |
1da177e4 LT |
3070 | strcpy(bcc_ptr, tree); |
3071 | bcc_ptr += strlen(tree) + 1; | |
3072 | } | |
3073 | strcpy(bcc_ptr, "?????"); | |
3074 | bcc_ptr += strlen("?????"); | |
3075 | bcc_ptr += 1; | |
3076 | count = bcc_ptr - &pSMB->Password[0]; | |
3077 | pSMB->hdr.smb_buf_length += count; | |
3078 | pSMB->ByteCount = cpu_to_le16(count); | |
3079 | ||
133672ef | 3080 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3081 | 0); |
1da177e4 | 3082 | |
1da177e4 LT |
3083 | /* above now done in SendReceive */ |
3084 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3085 | bool is_unicode; |
3086 | ||
1da177e4 | 3087 | tcon->tidStatus = CifsGood; |
3b795210 | 3088 | tcon->need_reconnect = false; |
1da177e4 LT |
3089 | tcon->tid = smb_buffer_response->Tid; |
3090 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3091 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3092 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3093 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3094 | is_unicode = true; | |
3095 | else | |
3096 | is_unicode = false; | |
3097 | ||
cc20c031 | 3098 | |
50c2f753 | 3099 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3100 | if (length == 3) { |
3101 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3102 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3103 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3104 | tcon->ipc = 1; |
3105 | } | |
3106 | } else if (length == 2) { | |
3107 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3108 | /* the most common case */ | |
b6b38f70 | 3109 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3110 | } |
3111 | } | |
50c2f753 | 3112 | bcc_ptr += length + 1; |
cc20c031 | 3113 | bytes_left -= (length + 1); |
1da177e4 | 3114 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3115 | |
3116 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3117 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3118 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3119 | bytes_left, is_unicode, |
cc20c031 JL |
3120 | nls_codepage); |
3121 | ||
b6b38f70 | 3122 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3123 | |
fb8c4b14 | 3124 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3125 | (smb_buffer_response->WordCount == 7)) |
3126 | /* field is in same location */ | |
3979877e SF |
3127 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3128 | else | |
3129 | tcon->Flags = 0; | |
b6b38f70 | 3130 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3131 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3132 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3133 | ses->ipc_tid = smb_buffer_response->Tid; |
3134 | } | |
3135 | ||
a8a11d39 | 3136 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3137 | return rc; |
3138 | } | |
3139 | ||
3140 | int | |
3141 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
3142 | { | |
b647c35f JL |
3143 | struct rb_root *root = &cifs_sb->tlink_tree; |
3144 | struct rb_node *node; | |
3145 | struct tcon_link *tlink; | |
50c2f753 | 3146 | char *tmp; |
9d002df4 | 3147 | |
2de970ff JL |
3148 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3149 | ||
b647c35f JL |
3150 | spin_lock(&cifs_sb->tlink_tree_lock); |
3151 | while ((node = rb_first(root))) { | |
3152 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3153 | cifs_get_tlink(tlink); | |
3154 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3155 | rb_erase(node, root); | |
1da177e4 | 3156 | |
b647c35f JL |
3157 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3158 | cifs_put_tlink(tlink); | |
3159 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3160 | } | |
3161 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3162 | |
2fe87f02 SF |
3163 | tmp = cifs_sb->prepath; |
3164 | cifs_sb->prepathlen = 0; | |
3165 | cifs_sb->prepath = NULL; | |
3166 | kfree(tmp); | |
1da177e4 | 3167 | |
9d002df4 | 3168 | return 0; |
50c2f753 | 3169 | } |
1da177e4 | 3170 | |
198b5682 | 3171 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
3172 | { |
3173 | int rc = 0; | |
198b5682 | 3174 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3175 | |
198b5682 JL |
3176 | /* only send once per connect */ |
3177 | if (server->maxBuf != 0) | |
3178 | return 0; | |
3179 | ||
3180 | rc = CIFSSMBNegotiate(xid, ses); | |
3181 | if (rc == -EAGAIN) { | |
3182 | /* retry only once on 1st time connection */ | |
3183 | rc = CIFSSMBNegotiate(xid, ses); | |
3184 | if (rc == -EAGAIN) | |
3185 | rc = -EHOSTDOWN; | |
1da177e4 | 3186 | } |
198b5682 JL |
3187 | if (rc == 0) { |
3188 | spin_lock(&GlobalMid_Lock); | |
3189 | if (server->tcpStatus != CifsExiting) | |
3190 | server->tcpStatus = CifsGood; | |
3191 | else | |
3192 | rc = -EHOSTDOWN; | |
3193 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3194 | |
198b5682 JL |
3195 | } |
3196 | ||
3197 | return rc; | |
3198 | } | |
3199 | ||
3200 | ||
3201 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
3202 | struct nls_table *nls_info) | |
3203 | { | |
3204 | int rc = 0; | |
3205 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3206 | |
198b5682 JL |
3207 | ses->flags = 0; |
3208 | ses->capabilities = server->capabilities; | |
26b994fa | 3209 | if (linuxExtEnabled == 0) |
198b5682 | 3210 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3211 | |
b6b38f70 JP |
3212 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
3213 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 3214 | |
198b5682 | 3215 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3216 | if (rc) { |
b6b38f70 | 3217 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3218 | } else { |
5d0d2882 SP |
3219 | mutex_lock(&ses->server->srv_mutex); |
3220 | if (!server->session_estab) { | |
21e73393 | 3221 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3222 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3223 | server->sequence_number = 0x2; |
3224 | server->session_estab = true; | |
3225 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3226 | } |
3227 | mutex_unlock(&server->srv_mutex); | |
3228 | ||
b6b38f70 | 3229 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3230 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3231 | ses->status = CifsGood; |
3232 | ses->need_reconnect = false; | |
20418acd | 3233 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3234 | } |
26b994fa | 3235 | |
21e73393 SP |
3236 | kfree(ses->auth_key.response); |
3237 | ses->auth_key.response = NULL; | |
3238 | ses->auth_key.len = 0; | |
d3686d54 SP |
3239 | kfree(ses->ntlmssp); |
3240 | ses->ntlmssp = NULL; | |
21e73393 | 3241 | |
1da177e4 LT |
3242 | return rc; |
3243 | } | |
3244 | ||
d2445556 | 3245 | static struct cifsTconInfo * |
9d002df4 JL |
3246 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3247 | { | |
3248 | struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb); | |
3249 | struct cifsSesInfo *ses; | |
3250 | struct cifsTconInfo *tcon = NULL; | |
3251 | struct smb_vol *vol_info; | |
3252 | char username[MAX_USERNAME_SIZE + 1]; | |
3253 | ||
3254 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3255 | if (vol_info == NULL) { | |
3256 | tcon = ERR_PTR(-ENOMEM); | |
3257 | goto out; | |
3258 | } | |
3259 | ||
3260 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3261 | vol_info->username = username; | |
3262 | vol_info->local_nls = cifs_sb->local_nls; | |
3263 | vol_info->linux_uid = fsuid; | |
3264 | vol_info->cred_uid = fsuid; | |
3265 | vol_info->UNC = master_tcon->treeName; | |
3266 | vol_info->retry = master_tcon->retry; | |
3267 | vol_info->nocase = master_tcon->nocase; | |
3268 | vol_info->local_lease = master_tcon->local_lease; | |
3269 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3270 | ||
3271 | /* FIXME: allow for other secFlg settings */ | |
3272 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3273 | ||
3274 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3275 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3276 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3277 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3278 | |
3279 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3280 | if (IS_ERR(ses)) { | |
3281 | tcon = (struct cifsTconInfo *)ses; | |
3282 | cifs_put_tcp_session(master_tcon->ses->server); | |
3283 | goto out; | |
3284 | } | |
3285 | ||
3286 | tcon = cifs_get_tcon(ses, vol_info); | |
3287 | if (IS_ERR(tcon)) { | |
3288 | cifs_put_smb_ses(ses); | |
3289 | goto out; | |
3290 | } | |
3291 | ||
3292 | if (ses->capabilities & CAP_UNIX) | |
3293 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3294 | out: | |
3295 | kfree(vol_info); | |
3296 | ||
3297 | return tcon; | |
3298 | } | |
3299 | ||
413e661c | 3300 | static inline struct tcon_link * |
9d002df4 JL |
3301 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3302 | { | |
413e661c | 3303 | return cifs_sb->master_tlink; |
9d002df4 JL |
3304 | } |
3305 | ||
3306 | struct cifsTconInfo * | |
3307 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) | |
3308 | { | |
3309 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3310 | } | |
3311 | ||
3312 | static int | |
3313 | cifs_sb_tcon_pending_wait(void *unused) | |
3314 | { | |
3315 | schedule(); | |
3316 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3317 | } | |
3318 | ||
b647c35f JL |
3319 | /* find and return a tlink with given uid */ |
3320 | static struct tcon_link * | |
3321 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3322 | { | |
3323 | struct rb_node *node = root->rb_node; | |
3324 | struct tcon_link *tlink; | |
3325 | ||
3326 | while (node) { | |
3327 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3328 | ||
3329 | if (tlink->tl_uid > uid) | |
3330 | node = node->rb_left; | |
3331 | else if (tlink->tl_uid < uid) | |
3332 | node = node->rb_right; | |
3333 | else | |
3334 | return tlink; | |
3335 | } | |
3336 | return NULL; | |
3337 | } | |
3338 | ||
3339 | /* insert a tcon_link into the tree */ | |
3340 | static void | |
3341 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3342 | { | |
3343 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3344 | struct tcon_link *tlink; | |
3345 | ||
3346 | while (*new) { | |
3347 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3348 | parent = *new; | |
3349 | ||
3350 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3351 | new = &((*new)->rb_left); | |
3352 | else | |
3353 | new = &((*new)->rb_right); | |
3354 | } | |
3355 | ||
3356 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3357 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3358 | } | |
3359 | ||
9d002df4 JL |
3360 | /* |
3361 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3362 | * current task. | |
3363 | * | |
3364 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3365 | * the master tcon for the mount. | |
3366 | * | |
6ef933a3 | 3367 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3368 | * exists, then check to see if it's pending construction. If it is then wait |
3369 | * for construction to complete. Once it's no longer pending, check to see if | |
3370 | * it failed and either return an error or retry construction, depending on | |
3371 | * the timeout. | |
3372 | * | |
3373 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3374 | * try to construct a new one. | |
3375 | */ | |
3376 | struct tcon_link * | |
3377 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3378 | { | |
3379 | int ret; | |
b647c35f | 3380 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3381 | struct tcon_link *tlink, *newtlink; |
3382 | ||
3383 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3384 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3385 | ||
3386 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3387 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3388 | if (tlink) |
3389 | cifs_get_tlink(tlink); | |
3390 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3391 | ||
3392 | if (tlink == NULL) { | |
3393 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3394 | if (newtlink == NULL) | |
3395 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3396 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3397 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3398 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3399 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3400 | cifs_get_tlink(newtlink); | |
3401 | ||
9d002df4 JL |
3402 | spin_lock(&cifs_sb->tlink_tree_lock); |
3403 | /* was one inserted after previous search? */ | |
b647c35f | 3404 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3405 | if (tlink) { |
3406 | cifs_get_tlink(tlink); | |
3407 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3408 | kfree(newtlink); |
3409 | goto wait_for_construction; | |
3410 | } | |
9d002df4 | 3411 | tlink = newtlink; |
b647c35f JL |
3412 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3413 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3414 | } else { |
3415 | wait_for_construction: | |
3416 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3417 | cifs_sb_tcon_pending_wait, | |
3418 | TASK_INTERRUPTIBLE); | |
3419 | if (ret) { | |
3420 | cifs_put_tlink(tlink); | |
3421 | return ERR_PTR(ret); | |
3422 | } | |
3423 | ||
3424 | /* if it's good, return it */ | |
3425 | if (!IS_ERR(tlink->tl_tcon)) | |
3426 | return tlink; | |
3427 | ||
3428 | /* return error if we tried this already recently */ | |
3429 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3430 | cifs_put_tlink(tlink); | |
3431 | return ERR_PTR(-EACCES); | |
3432 | } | |
3433 | ||
3434 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3435 | goto wait_for_construction; | |
3436 | } | |
3437 | ||
3438 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3439 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3440 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3441 | ||
3442 | if (IS_ERR(tlink->tl_tcon)) { | |
3443 | cifs_put_tlink(tlink); | |
3444 | return ERR_PTR(-EACCES); | |
3445 | } | |
3446 | ||
3447 | return tlink; | |
3448 | } | |
2de970ff JL |
3449 | |
3450 | /* | |
3451 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3452 | * out tcons. | |
3453 | */ | |
3454 | static void | |
3455 | cifs_prune_tlinks(struct work_struct *work) | |
3456 | { | |
3457 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3458 | prune_tlinks.work); | |
b647c35f JL |
3459 | struct rb_root *root = &cifs_sb->tlink_tree; |
3460 | struct rb_node *node = rb_first(root); | |
3461 | struct rb_node *tmp; | |
3462 | struct tcon_link *tlink; | |
2de970ff | 3463 | |
b647c35f JL |
3464 | /* |
3465 | * Because we drop the spinlock in the loop in order to put the tlink | |
3466 | * it's not guarded against removal of links from the tree. The only | |
3467 | * places that remove entries from the tree are this function and | |
3468 | * umounts. Because this function is non-reentrant and is canceled | |
3469 | * before umount can proceed, this is safe. | |
3470 | */ | |
3471 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3472 | node = rb_first(root); | |
3473 | while (node != NULL) { | |
3474 | tmp = node; | |
3475 | node = rb_next(tmp); | |
3476 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3477 | ||
3478 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3479 | atomic_read(&tlink->tl_count) != 0 || | |
3480 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3481 | continue; | |
2de970ff | 3482 | |
b647c35f JL |
3483 | cifs_get_tlink(tlink); |
3484 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3485 | rb_erase(tmp, root); | |
3486 | ||
3487 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3488 | cifs_put_tlink(tlink); | |
3489 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3490 | } | |
3491 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3492 | |
3493 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3494 | TLINK_IDLE_EXPIRE); | |
3495 | } |