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Commit | Line | Data |
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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 | ||
1da177e4 LT |
55 | extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, |
56 | unsigned char *p24); | |
57 | ||
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; | |
95b1cb90 SF |
87 | bool remap:1; /* set to remap seven reserved chars in filenames */ |
88 | bool posix_paths:1; /* unset to not ask for posix pathnames. */ | |
4b18f2a9 SF |
89 | bool no_linux_ext:1; |
90 | bool sfu_emul:1; | |
95b1cb90 SF |
91 | bool nullauth:1; /* attempt to authenticate with null user */ |
92 | bool nocase:1; /* request case insensitive filenames */ | |
93 | bool nobrl:1; /* disable sending byte range locks to srv */ | |
13a6e42a | 94 | bool mand_lock:1; /* send mandatory not posix byte range lock reqs */ |
95b1cb90 | 95 | bool seal:1; /* request transport encryption on share */ |
84210e91 SF |
96 | bool nodfs:1; /* Do not request DFS, even if available */ |
97 | bool local_lease:1; /* check leases only on local system, not remote */ | |
edf1ae40 SF |
98 | bool noblocksnd:1; |
99 | bool noautotune:1; | |
be652445 | 100 | bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ |
fa1df75d | 101 | bool fsc:1; /* enable fscache */ |
736a3320 | 102 | bool mfsymlinks:1; /* use Minshall+French Symlinks */ |
0eb8a132 | 103 | bool multiuser:1; |
1da177e4 LT |
104 | unsigned int rsize; |
105 | unsigned int wsize; | |
6a5fa236 | 106 | bool sockopt_tcp_nodelay:1; |
1da177e4 | 107 | unsigned short int port; |
6d20e840 | 108 | unsigned long actimeo; /* attribute cache timeout (jiffies) */ |
fb8c4b14 | 109 | char *prepath; |
3eb9a889 | 110 | struct sockaddr_storage srcaddr; /* allow binding to a local IP */ |
a5fc4ce0 | 111 | struct nls_table *local_nls; |
1da177e4 LT |
112 | }; |
113 | ||
2de970ff | 114 | /* FIXME: should these be tunable? */ |
9d002df4 | 115 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 116 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 117 | |
a9f1b85e PS |
118 | static int ip_connect(struct TCP_Server_Info *server); |
119 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 120 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 121 | static void cifs_prune_tlinks(struct work_struct *work); |
1da177e4 | 122 | |
d5c5605c JL |
123 | /* |
124 | * cifs tcp session reconnection | |
125 | * | |
126 | * mark tcp session as reconnecting so temporarily locked | |
127 | * mark all smb sessions as reconnecting for tcp session | |
128 | * reconnect tcp session | |
129 | * wake up waiters on reconnection? - (not needed currently) | |
130 | */ | |
2cd646a2 | 131 | static int |
1da177e4 LT |
132 | cifs_reconnect(struct TCP_Server_Info *server) |
133 | { | |
134 | int rc = 0; | |
f1987b44 | 135 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
136 | struct cifsSesInfo *ses; |
137 | struct cifsTconInfo *tcon; | |
fb8c4b14 | 138 | struct mid_q_entry *mid_entry; |
50c2f753 | 139 | |
1da177e4 | 140 | spin_lock(&GlobalMid_Lock); |
469ee614 | 141 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 142 | /* the demux thread will exit normally |
1da177e4 LT |
143 | next time through the loop */ |
144 | spin_unlock(&GlobalMid_Lock); | |
145 | return rc; | |
146 | } else | |
147 | server->tcpStatus = CifsNeedReconnect; | |
148 | spin_unlock(&GlobalMid_Lock); | |
149 | server->maxBuf = 0; | |
150 | ||
b6b38f70 | 151 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
152 | |
153 | /* before reconnecting the tcp session, mark the smb session (uid) | |
154 | and the tid bad so they are not used until reconnected */ | |
3f9bcca7 | 155 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d JL |
156 | list_for_each(tmp, &server->smb_ses_list) { |
157 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
158 | ses->need_reconnect = true; | |
159 | ses->ipc_tid = 0; | |
f1987b44 JL |
160 | list_for_each(tmp2, &ses->tcon_list) { |
161 | tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list); | |
3b795210 | 162 | tcon->need_reconnect = true; |
1da177e4 | 163 | } |
1da177e4 | 164 | } |
3f9bcca7 | 165 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 | 166 | /* do not want to be sending data on a socket we are freeing */ |
72ca545b | 167 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 168 | if (server->ssocket) { |
b6b38f70 JP |
169 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
170 | server->ssocket->flags); | |
91cf45f0 | 171 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 172 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 173 | server->ssocket->state, |
b6b38f70 | 174 | server->ssocket->flags); |
1da177e4 LT |
175 | sock_release(server->ssocket); |
176 | server->ssocket = NULL; | |
177 | } | |
5d0d2882 SP |
178 | server->sequence_number = 0; |
179 | server->session_estab = false; | |
21e73393 SP |
180 | kfree(server->session_key.response); |
181 | server->session_key.response = NULL; | |
182 | server->session_key.len = 0; | |
1da177e4 LT |
183 | |
184 | spin_lock(&GlobalMid_Lock); | |
185 | list_for_each(tmp, &server->pending_mid_q) { | |
186 | mid_entry = list_entry(tmp, struct | |
187 | mid_q_entry, | |
188 | qhead); | |
ad8b15f0 | 189 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) { |
09d1db5c SF |
190 | /* Mark other intransit requests as needing |
191 | retry so we do not immediately mark the | |
192 | session bad again (ie after we reconnect | |
193 | below) as they timeout too */ | |
ad8b15f0 | 194 | mid_entry->midState = MID_RETRY_NEEDED; |
1da177e4 LT |
195 | } |
196 | } | |
197 | spin_unlock(&GlobalMid_Lock); | |
72ca545b | 198 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 199 | |
469ee614 JL |
200 | while ((server->tcpStatus != CifsExiting) && |
201 | (server->tcpStatus != CifsGood)) { | |
6c3d8909 | 202 | try_to_freeze(); |
a9f1b85e PS |
203 | |
204 | /* we should try only the port we connected to before */ | |
205 | rc = generic_ip_connect(server); | |
fb8c4b14 | 206 | if (rc) { |
b6b38f70 | 207 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 208 | msleep(3000); |
1da177e4 LT |
209 | } else { |
210 | atomic_inc(&tcpSesReconnectCount); | |
211 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 212 | if (server->tcpStatus != CifsExiting) |
1da177e4 | 213 | server->tcpStatus = CifsGood; |
fb8c4b14 | 214 | spin_unlock(&GlobalMid_Lock); |
1da177e4 LT |
215 | /* atomic_set(&server->inFlight,0);*/ |
216 | wake_up(&server->response_q); | |
217 | } | |
218 | } | |
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 SF |
231 | struct smb_t2_rsp *pSMBt; |
232 | int total_data_size; | |
e4eb295d SF |
233 | int data_in_this_rsp; |
234 | int remaining; | |
235 | ||
fb8c4b14 | 236 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
237 | return 0; |
238 | ||
fb8c4b14 SF |
239 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
240 | /* check for parm and data offset going beyond end of smb */ | |
241 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 242 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
243 | return -EINVAL; |
244 | } | |
245 | ||
246 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
247 | ||
248 | total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount); | |
249 | data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount); | |
250 | ||
251 | remaining = total_data_size - data_in_this_rsp; | |
252 | ||
fb8c4b14 | 253 | if (remaining == 0) |
e4eb295d | 254 | return 0; |
fb8c4b14 | 255 | else if (remaining < 0) { |
b6b38f70 JP |
256 | cFYI(1, "total data %d smaller than data in frame %d", |
257 | total_data_size, data_in_this_rsp); | |
e4eb295d SF |
258 | return -EINVAL; |
259 | } else { | |
b6b38f70 JP |
260 | cFYI(1, "missing %d bytes from transact2, check next response", |
261 | remaining); | |
fb8c4b14 | 262 | if (total_data_size > maxBufSize) { |
b6b38f70 JP |
263 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
264 | total_data_size, maxBufSize); | |
fb8c4b14 | 265 | return -EINVAL; |
e4eb295d SF |
266 | } |
267 | return remaining; | |
268 | } | |
269 | } | |
270 | ||
fb8c4b14 | 271 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
272 | { |
273 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
274 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
275 | int total_data_size; | |
276 | int total_in_buf; | |
277 | int remaining; | |
278 | int total_in_buf2; | |
fb8c4b14 SF |
279 | char *data_area_of_target; |
280 | char *data_area_of_buf2; | |
e4eb295d SF |
281 | __u16 byte_count; |
282 | ||
283 | total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount); | |
284 | ||
fb8c4b14 | 285 | if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) { |
b6b38f70 | 286 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d SF |
287 | } |
288 | ||
289 | total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount); | |
290 | ||
291 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 292 | |
fb8c4b14 | 293 | if (remaining < 0) |
e4eb295d SF |
294 | return -EINVAL; |
295 | ||
fb8c4b14 | 296 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 297 | return 0; |
50c2f753 | 298 | |
e4eb295d | 299 | total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 300 | if (remaining < total_in_buf2) { |
b6b38f70 | 301 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
302 | } |
303 | ||
304 | /* find end of first SMB data area */ | |
fb8c4b14 | 305 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
e4eb295d SF |
306 | le16_to_cpu(pSMBt->t2_rsp.DataOffset); |
307 | /* validate target area */ | |
308 | ||
309 | data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol + | |
fb8c4b14 | 310 | le16_to_cpu(pSMB2->t2_rsp.DataOffset); |
e4eb295d SF |
311 | |
312 | data_area_of_target += total_in_buf; | |
313 | ||
314 | /* copy second buffer into end of first buffer */ | |
fb8c4b14 | 315 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
e4eb295d SF |
316 | total_in_buf += total_in_buf2; |
317 | pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf); | |
318 | byte_count = le16_to_cpu(BCC_LE(pTargetSMB)); | |
319 | byte_count += total_in_buf2; | |
320 | BCC_LE(pTargetSMB) = cpu_to_le16(byte_count); | |
321 | ||
70ca734a | 322 | byte_count = pTargetSMB->smb_buf_length; |
e4eb295d SF |
323 | byte_count += total_in_buf2; |
324 | ||
325 | /* BB also add check that we are not beyond maximum buffer size */ | |
50c2f753 | 326 | |
70ca734a | 327 | pTargetSMB->smb_buf_length = byte_count; |
e4eb295d | 328 | |
fb8c4b14 | 329 | if (remaining == total_in_buf2) { |
b6b38f70 | 330 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
331 | return 0; /* we are done */ |
332 | } else /* more responses to go */ | |
333 | return 1; | |
334 | ||
335 | } | |
336 | ||
1da177e4 LT |
337 | static int |
338 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
339 | { | |
340 | int length; | |
341 | unsigned int pdu_length, total_read; | |
342 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
343 | struct smb_hdr *bigbuf = NULL; |
344 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
345 | struct msghdr smb_msg; |
346 | struct kvec iov; | |
347 | struct socket *csocket = server->ssocket; | |
348 | struct list_head *tmp; | |
349 | struct cifsSesInfo *ses; | |
350 | struct task_struct *task_to_wake = NULL; | |
351 | struct mid_q_entry *mid_entry; | |
70ca734a | 352 | char temp; |
4b18f2a9 SF |
353 | bool isLargeBuf = false; |
354 | bool isMultiRsp; | |
e4eb295d | 355 | int reconnect; |
1da177e4 | 356 | |
1da177e4 | 357 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 358 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
359 | |
360 | length = atomic_inc_return(&tcpSesAllocCount); | |
361 | if (length > 1) | |
26f57364 SF |
362 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
363 | GFP_KERNEL); | |
1da177e4 | 364 | |
83144186 | 365 | set_freezable(); |
469ee614 | 366 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
367 | if (try_to_freeze()) |
368 | continue; | |
b8643e1b SF |
369 | if (bigbuf == NULL) { |
370 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 371 | if (!bigbuf) { |
b6b38f70 | 372 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
373 | msleep(3000); |
374 | /* retry will check if exiting */ | |
375 | continue; | |
376 | } | |
0fd1ffe0 PM |
377 | } else if (isLargeBuf) { |
378 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 379 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 380 | } |
b8643e1b SF |
381 | |
382 | if (smallbuf == NULL) { | |
383 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 384 | if (!smallbuf) { |
b6b38f70 | 385 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
386 | msleep(1000); |
387 | /* retry will check if exiting */ | |
388 | continue; | |
389 | } | |
390 | /* beginning of smb buffer is cleared in our buf_get */ | |
391 | } else /* if existing small buf clear beginning */ | |
26f57364 | 392 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 393 | |
4b18f2a9 SF |
394 | isLargeBuf = false; |
395 | isMultiRsp = false; | |
b8643e1b | 396 | smb_buffer = smallbuf; |
1da177e4 LT |
397 | iov.iov_base = smb_buffer; |
398 | iov.iov_len = 4; | |
399 | smb_msg.msg_control = NULL; | |
400 | smb_msg.msg_controllen = 0; | |
f01d5e14 SF |
401 | pdu_length = 4; /* enough to get RFC1001 header */ |
402 | incomplete_rcv: | |
1da177e4 LT |
403 | length = |
404 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 405 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 406 | |
469ee614 | 407 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
408 | break; |
409 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 410 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 411 | cifs_reconnect(server); |
b6b38f70 | 412 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
413 | csocket = server->ssocket; |
414 | continue; | |
522bbe65 JL |
415 | } else if (length == -ERESTARTSYS || |
416 | length == -EAGAIN || | |
417 | length == -EINTR) { | |
b8643e1b | 418 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
419 | allowing socket to clear and app threads to set |
420 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
421 | if (pdu_length < 4) { |
422 | iov.iov_base = (4 - pdu_length) + | |
423 | (char *)smb_buffer; | |
424 | iov.iov_len = pdu_length; | |
425 | smb_msg.msg_control = NULL; | |
426 | smb_msg.msg_controllen = 0; | |
c18c732e | 427 | goto incomplete_rcv; |
c527c8a7 | 428 | } else |
c18c732e | 429 | continue; |
1da177e4 | 430 | } else if (length <= 0) { |
b6b38f70 JP |
431 | cFYI(1, "Reconnect after unexpected peek error %d", |
432 | length); | |
1da177e4 LT |
433 | cifs_reconnect(server); |
434 | csocket = server->ssocket; | |
435 | wake_up(&server->response_q); | |
436 | continue; | |
2a974680 | 437 | } else if (length < pdu_length) { |
b6b38f70 JP |
438 | cFYI(1, "requested %d bytes but only got %d bytes", |
439 | pdu_length, length); | |
f01d5e14 | 440 | pdu_length -= length; |
f01d5e14 SF |
441 | msleep(1); |
442 | goto incomplete_rcv; | |
46810cbf | 443 | } |
1da177e4 | 444 | |
70ca734a SF |
445 | /* The right amount was read from socket - 4 bytes */ |
446 | /* so we can now interpret the length field */ | |
46810cbf | 447 | |
70ca734a SF |
448 | /* the first byte big endian of the length field, |
449 | is actually not part of the length but the type | |
450 | with the most common, zero, as regular data */ | |
451 | temp = *((char *) smb_buffer); | |
46810cbf | 452 | |
fb8c4b14 | 453 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
454 | but we convert it here so it is always manipulated |
455 | as host byte order */ | |
5ca33c6a | 456 | pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length); |
70ca734a SF |
457 | smb_buffer->smb_buf_length = pdu_length; |
458 | ||
b6b38f70 | 459 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 460 | |
70ca734a | 461 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 462 | continue; |
70ca734a | 463 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 464 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 465 | continue; |
70ca734a | 466 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 467 | /* we get this from Windows 98 instead of |
46810cbf | 468 | an error on SMB negprot response */ |
b6b38f70 JP |
469 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
470 | pdu_length); | |
7332f2a6 JL |
471 | /* give server a second to clean up */ |
472 | msleep(1000); | |
473 | /* always try 445 first on reconnect since we get NACK | |
474 | * on some if we ever connected to port 139 (the NACK | |
475 | * is since we do not begin with RFC1001 session | |
476 | * initialize frame) | |
477 | */ | |
32670396 | 478 | cifs_set_port((struct sockaddr *) |
a9f1b85e | 479 | &server->dstaddr, CIFS_PORT); |
7332f2a6 JL |
480 | cifs_reconnect(server); |
481 | csocket = server->ssocket; | |
482 | wake_up(&server->response_q); | |
483 | continue; | |
70ca734a | 484 | } else if (temp != (char) 0) { |
b6b38f70 | 485 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
486 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
487 | length); | |
46810cbf SF |
488 | cifs_reconnect(server); |
489 | csocket = server->ssocket; | |
490 | continue; | |
e4eb295d SF |
491 | } |
492 | ||
493 | /* else we have an SMB response */ | |
fb8c4b14 | 494 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 495 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
496 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
497 | length, pdu_length+4); | |
e4eb295d SF |
498 | cifs_reconnect(server); |
499 | csocket = server->ssocket; | |
500 | wake_up(&server->response_q); | |
501 | continue; | |
fb8c4b14 | 502 | } |
e4eb295d SF |
503 | |
504 | /* else length ok */ | |
505 | reconnect = 0; | |
506 | ||
fb8c4b14 | 507 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 508 | isLargeBuf = true; |
e4eb295d SF |
509 | memcpy(bigbuf, smallbuf, 4); |
510 | smb_buffer = bigbuf; | |
511 | } | |
512 | length = 0; | |
513 | iov.iov_base = 4 + (char *)smb_buffer; | |
514 | iov.iov_len = pdu_length; | |
fb8c4b14 | 515 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
516 | total_read += length) { |
517 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
518 | pdu_length - total_read, 0); | |
522bbe65 | 519 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
520 | /* then will exit */ |
521 | reconnect = 2; | |
522 | break; | |
523 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
524 | cifs_reconnect(server); |
525 | csocket = server->ssocket; | |
fb8c4b14 | 526 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
527 | /* Now we will reread sock */ |
528 | reconnect = 1; | |
529 | break; | |
522bbe65 JL |
530 | } else if (length == -ERESTARTSYS || |
531 | length == -EAGAIN || | |
532 | length == -EINTR) { | |
e4eb295d | 533 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 534 | allowing socket to clear and app |
e4eb295d SF |
535 | threads to set tcpStatus |
536 | CifsNeedReconnect if server hung*/ | |
c18c732e | 537 | length = 0; |
46810cbf | 538 | continue; |
e4eb295d | 539 | } else if (length <= 0) { |
b6b38f70 JP |
540 | cERROR(1, "Received no data, expecting %d", |
541 | pdu_length - total_read); | |
e4eb295d SF |
542 | cifs_reconnect(server); |
543 | csocket = server->ssocket; | |
544 | reconnect = 1; | |
545 | break; | |
46810cbf | 546 | } |
e4eb295d | 547 | } |
fb8c4b14 | 548 | if (reconnect == 2) |
e4eb295d | 549 | break; |
fb8c4b14 | 550 | else if (reconnect == 1) |
e4eb295d | 551 | continue; |
1da177e4 | 552 | |
e4eb295d | 553 | length += 4; /* account for rfc1002 hdr */ |
50c2f753 | 554 | |
09d1db5c | 555 | |
e4eb295d | 556 | dump_smb(smb_buffer, length); |
184ed211 | 557 | if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) { |
b387eaeb | 558 | cifs_dump_mem("Bad SMB: ", smb_buffer, 48); |
e4eb295d SF |
559 | continue; |
560 | } | |
1da177e4 | 561 | |
e4eb295d SF |
562 | |
563 | task_to_wake = NULL; | |
564 | spin_lock(&GlobalMid_Lock); | |
565 | list_for_each(tmp, &server->pending_mid_q) { | |
566 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
567 | ||
50c2f753 | 568 | if ((mid_entry->mid == smb_buffer->Mid) && |
e4eb295d SF |
569 | (mid_entry->midState == MID_REQUEST_SUBMITTED) && |
570 | (mid_entry->command == smb_buffer->Command)) { | |
fb8c4b14 | 571 | if (check2ndT2(smb_buffer,server->maxBuf) > 0) { |
e4eb295d | 572 | /* We have a multipart transact2 resp */ |
4b18f2a9 | 573 | isMultiRsp = true; |
fb8c4b14 | 574 | if (mid_entry->resp_buf) { |
e4eb295d | 575 | /* merge response - fix up 1st*/ |
50c2f753 | 576 | if (coalesce_t2(smb_buffer, |
e4eb295d | 577 | mid_entry->resp_buf)) { |
4b18f2a9 SF |
578 | mid_entry->multiRsp = |
579 | true; | |
e4eb295d SF |
580 | break; |
581 | } else { | |
582 | /* all parts received */ | |
4b18f2a9 SF |
583 | mid_entry->multiEnd = |
584 | true; | |
50c2f753 | 585 | goto multi_t2_fnd; |
e4eb295d SF |
586 | } |
587 | } else { | |
fb8c4b14 | 588 | if (!isLargeBuf) { |
b6b38f70 | 589 | cERROR(1, "1st trans2 resp needs bigbuf"); |
e4eb295d | 590 | /* BB maybe we can fix this up, switch |
50c2f753 | 591 | to already allocated large buffer? */ |
e4eb295d | 592 | } else { |
cd63499c | 593 | /* Have first buffer */ |
e4eb295d SF |
594 | mid_entry->resp_buf = |
595 | smb_buffer; | |
4b18f2a9 SF |
596 | mid_entry->largeBuf = |
597 | true; | |
e4eb295d SF |
598 | bigbuf = NULL; |
599 | } | |
600 | } | |
601 | break; | |
50c2f753 | 602 | } |
e4eb295d | 603 | mid_entry->resp_buf = smb_buffer; |
4b18f2a9 | 604 | mid_entry->largeBuf = isLargeBuf; |
e4eb295d SF |
605 | multi_t2_fnd: |
606 | task_to_wake = mid_entry->tsk; | |
607 | mid_entry->midState = MID_RESPONSE_RECEIVED; | |
1047abc1 SF |
608 | #ifdef CONFIG_CIFS_STATS2 |
609 | mid_entry->when_received = jiffies; | |
610 | #endif | |
3a5ff61c SF |
611 | /* so we do not time out requests to server |
612 | which is still responding (since server could | |
613 | be busy but not dead) */ | |
614 | server->lstrp = jiffies; | |
e4eb295d | 615 | break; |
46810cbf | 616 | } |
1da177e4 | 617 | } |
e4eb295d SF |
618 | spin_unlock(&GlobalMid_Lock); |
619 | if (task_to_wake) { | |
cd63499c | 620 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 621 | if (!isMultiRsp) { |
cd63499c | 622 | /* smb buffer will be freed by user thread */ |
26f57364 | 623 | if (isLargeBuf) |
cd63499c | 624 | bigbuf = NULL; |
26f57364 | 625 | else |
cd63499c SF |
626 | smallbuf = NULL; |
627 | } | |
e4eb295d | 628 | wake_up_process(task_to_wake); |
4b18f2a9 SF |
629 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
630 | !isMultiRsp) { | |
b6b38f70 JP |
631 | cERROR(1, "No task to wake, unknown frame received! " |
632 | "NumMids %d", midCount.counter); | |
50c2f753 | 633 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 634 | sizeof(struct smb_hdr)); |
3979877e SF |
635 | #ifdef CONFIG_CIFS_DEBUG2 |
636 | cifs_dump_detail(smb_buffer); | |
637 | cifs_dump_mids(server); | |
638 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 639 | |
e4eb295d SF |
640 | } |
641 | } /* end while !EXITING */ | |
642 | ||
e7ddee90 | 643 | /* take it off the list, if it's not already */ |
3f9bcca7 | 644 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 645 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 646 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 647 | |
1da177e4 LT |
648 | spin_lock(&GlobalMid_Lock); |
649 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 650 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 651 | wake_up_all(&server->response_q); |
e691b9d1 | 652 | |
31ca3bc3 SF |
653 | /* check if we have blocked requests that need to free */ |
654 | /* Note that cifs_max_pending is normally 50, but | |
655 | can be set at module install time to as little as two */ | |
e691b9d1 | 656 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 657 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
658 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
659 | /* We do not want to set the max_pending too low or we | |
660 | could end up with the counter going negative */ | |
1da177e4 | 661 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 662 | /* Although there should not be any requests blocked on |
1da177e4 | 663 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 664 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
665 | to the same server - they now will see the session is in exit state |
666 | and get out of SendReceive. */ | |
667 | wake_up_all(&server->request_q); | |
668 | /* give those requests time to exit */ | |
b8643e1b | 669 | msleep(125); |
50c2f753 | 670 | |
fb8c4b14 | 671 | if (server->ssocket) { |
1da177e4 LT |
672 | sock_release(csocket); |
673 | server->ssocket = NULL; | |
674 | } | |
b8643e1b | 675 | /* buffer usuallly freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
676 | cifs_buf_release(bigbuf); |
677 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 678 | cifs_small_buf_release(smallbuf); |
1da177e4 | 679 | |
14fbf50d JL |
680 | /* |
681 | * BB: we shouldn't have to do any of this. It shouldn't be | |
682 | * possible to exit from the thread with active SMB sessions | |
683 | */ | |
3f9bcca7 | 684 | spin_lock(&cifs_tcp_ses_lock); |
1da177e4 | 685 | if (list_empty(&server->pending_mid_q)) { |
09d1db5c SF |
686 | /* loop through server session structures attached to this and |
687 | mark them dead */ | |
14fbf50d JL |
688 | list_for_each(tmp, &server->smb_ses_list) { |
689 | ses = list_entry(tmp, struct cifsSesInfo, | |
690 | smb_ses_list); | |
691 | ses->status = CifsExiting; | |
692 | ses->server = NULL; | |
1da177e4 | 693 | } |
3f9bcca7 | 694 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 | 695 | } else { |
31ca3bc3 SF |
696 | /* although we can not zero the server struct pointer yet, |
697 | since there are active requests which may depnd on them, | |
698 | mark the corresponding SMB sessions as exiting too */ | |
14fbf50d | 699 | list_for_each(tmp, &server->smb_ses_list) { |
31ca3bc3 | 700 | ses = list_entry(tmp, struct cifsSesInfo, |
14fbf50d JL |
701 | smb_ses_list); |
702 | ses->status = CifsExiting; | |
31ca3bc3 SF |
703 | } |
704 | ||
1da177e4 LT |
705 | spin_lock(&GlobalMid_Lock); |
706 | list_for_each(tmp, &server->pending_mid_q) { | |
707 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
708 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) { | |
b6b38f70 JP |
709 | cFYI(1, "Clearing Mid 0x%x - waking up ", |
710 | mid_entry->mid); | |
1da177e4 | 711 | task_to_wake = mid_entry->tsk; |
26f57364 | 712 | if (task_to_wake) |
1da177e4 | 713 | wake_up_process(task_to_wake); |
1da177e4 LT |
714 | } |
715 | } | |
716 | spin_unlock(&GlobalMid_Lock); | |
3f9bcca7 | 717 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 | 718 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 719 | msleep(125); |
1da177e4 LT |
720 | } |
721 | ||
f191401f | 722 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 723 | /* mpx threads have not exited yet give them |
1da177e4 | 724 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
725 | /* due to delays on oplock break requests, we need |
726 | to wait at least 45 seconds before giving up | |
727 | on a request getting a response and going ahead | |
728 | and killing cifsd */ | |
b6b38f70 | 729 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 730 | msleep(46000); |
1da177e4 LT |
731 | /* if threads still have not exited they are probably never |
732 | coming home not much else we can do but free the memory */ | |
733 | } | |
1da177e4 | 734 | |
31ca3bc3 SF |
735 | /* last chance to mark ses pointers invalid |
736 | if there are any pointing to this (e.g | |
50c2f753 | 737 | if a crazy root user tried to kill cifsd |
31ca3bc3 | 738 | kernel thread explicitly this might happen) */ |
14fbf50d | 739 | /* BB: This shouldn't be necessary, see above */ |
3f9bcca7 | 740 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d JL |
741 | list_for_each(tmp, &server->smb_ses_list) { |
742 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
743 | ses->server = NULL; | |
31ca3bc3 | 744 | } |
3f9bcca7 | 745 | spin_unlock(&cifs_tcp_ses_lock); |
31ca3bc3 | 746 | |
c359cf3c | 747 | kfree(server->hostname); |
b1c8d2b4 | 748 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 749 | kfree(server); |
93d0ec85 JL |
750 | |
751 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
752 | if (length > 0) |
753 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
754 | GFP_KERNEL); | |
50c2f753 | 755 | |
b1c8d2b4 JL |
756 | /* if server->tsk was NULL then wait for a signal before exiting */ |
757 | if (!task_to_wake) { | |
758 | set_current_state(TASK_INTERRUPTIBLE); | |
759 | while (!signal_pending(current)) { | |
760 | schedule(); | |
761 | set_current_state(TASK_INTERRUPTIBLE); | |
762 | } | |
763 | set_current_state(TASK_RUNNING); | |
764 | } | |
765 | ||
0468a2cf | 766 | module_put_and_exit(0); |
1da177e4 LT |
767 | } |
768 | ||
c359cf3c JL |
769 | /* extract the host portion of the UNC string */ |
770 | static char * | |
771 | extract_hostname(const char *unc) | |
772 | { | |
773 | const char *src; | |
774 | char *dst, *delim; | |
775 | unsigned int len; | |
776 | ||
777 | /* skip double chars at beginning of string */ | |
778 | /* BB: check validity of these bytes? */ | |
779 | src = unc + 2; | |
780 | ||
781 | /* delimiter between hostname and sharename is always '\\' now */ | |
782 | delim = strchr(src, '\\'); | |
783 | if (!delim) | |
784 | return ERR_PTR(-EINVAL); | |
785 | ||
786 | len = delim - src; | |
787 | dst = kmalloc((len + 1), GFP_KERNEL); | |
788 | if (dst == NULL) | |
789 | return ERR_PTR(-ENOMEM); | |
790 | ||
791 | memcpy(dst, src, len); | |
792 | dst[len] = '\0'; | |
793 | ||
794 | return dst; | |
795 | } | |
796 | ||
1da177e4 | 797 | static int |
50c2f753 SF |
798 | cifs_parse_mount_options(char *options, const char *devname, |
799 | struct smb_vol *vol) | |
1da177e4 LT |
800 | { |
801 | char *value; | |
802 | char *data; | |
803 | unsigned int temp_len, i, j; | |
804 | char separator[2]; | |
9b9d6b24 JL |
805 | short int override_uid = -1; |
806 | short int override_gid = -1; | |
807 | bool uid_specified = false; | |
808 | bool gid_specified = false; | |
88463999 | 809 | char *nodename = utsname()->nodename; |
1da177e4 LT |
810 | |
811 | separator[0] = ','; | |
50c2f753 | 812 | separator[1] = 0; |
1da177e4 | 813 | |
88463999 JL |
814 | /* |
815 | * does not have to be perfect mapping since field is | |
816 | * informational, only used for servers that do not support | |
817 | * port 445 and it can be overridden at mount time | |
818 | */ | |
1397f2ee JL |
819 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
820 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
821 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
822 | ||
1397f2ee | 823 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
824 | /* null target name indicates to use *SMBSERVR default called name |
825 | if we end up sending RFC1001 session initialize */ | |
826 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
827 | vol->cred_uid = current_uid(); |
828 | vol->linux_uid = current_uid(); | |
a001e5b5 | 829 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
830 | |
831 | /* default to only allowing write access to owner of the mount */ | |
832 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
833 | |
834 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
835 | /* default is always to request posix paths. */ |
836 | vol->posix_paths = 1; | |
a0c9217f JL |
837 | /* default to using server inode numbers where available */ |
838 | vol->server_ino = 1; | |
ac67055e | 839 | |
6d20e840 SJ |
840 | vol->actimeo = CIFS_DEF_ACTIMEO; |
841 | ||
1da177e4 LT |
842 | if (!options) |
843 | return 1; | |
844 | ||
50c2f753 | 845 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 846 | if (options[4] != 0) { |
1da177e4 LT |
847 | separator[0] = options[4]; |
848 | options += 5; | |
849 | } else { | |
b6b38f70 | 850 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
851 | } |
852 | } | |
50c2f753 | 853 | |
1da177e4 LT |
854 | while ((data = strsep(&options, separator)) != NULL) { |
855 | if (!*data) | |
856 | continue; | |
857 | if ((value = strchr(data, '=')) != NULL) | |
858 | *value++ = '\0'; | |
859 | ||
50c2f753 SF |
860 | /* Have to parse this before we parse for "user" */ |
861 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 862 | vol->no_xattr = 0; |
50c2f753 | 863 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
864 | vol->no_xattr = 1; |
865 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 866 | if (!value) { |
1da177e4 LT |
867 | printk(KERN_WARNING |
868 | "CIFS: invalid or missing username\n"); | |
869 | return 1; /* needs_arg; */ | |
fb8c4b14 | 870 | } else if (!*value) { |
4b952a9b SF |
871 | /* null user, ie anonymous, authentication */ |
872 | vol->nullauth = 1; | |
1da177e4 LT |
873 | } |
874 | if (strnlen(value, 200) < 200) { | |
875 | vol->username = value; | |
876 | } else { | |
877 | printk(KERN_WARNING "CIFS: username too long\n"); | |
878 | return 1; | |
879 | } | |
880 | } else if (strnicmp(data, "pass", 4) == 0) { | |
881 | if (!value) { | |
882 | vol->password = NULL; | |
883 | continue; | |
fb8c4b14 | 884 | } else if (value[0] == 0) { |
1da177e4 LT |
885 | /* check if string begins with double comma |
886 | since that would mean the password really | |
887 | does start with a comma, and would not | |
888 | indicate an empty string */ | |
fb8c4b14 | 889 | if (value[1] != separator[0]) { |
1da177e4 LT |
890 | vol->password = NULL; |
891 | continue; | |
892 | } | |
893 | } | |
894 | temp_len = strlen(value); | |
895 | /* removed password length check, NTLM passwords | |
896 | can be arbitrarily long */ | |
897 | ||
50c2f753 | 898 | /* if comma in password, the string will be |
1da177e4 LT |
899 | prematurely null terminated. Commas in password are |
900 | specified across the cifs mount interface by a double | |
901 | comma ie ,, and a comma used as in other cases ie ',' | |
902 | as a parameter delimiter/separator is single and due | |
903 | to the strsep above is temporarily zeroed. */ | |
904 | ||
905 | /* NB: password legally can have multiple commas and | |
906 | the only illegal character in a password is null */ | |
907 | ||
50c2f753 | 908 | if ((value[temp_len] == 0) && |
09d1db5c | 909 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
910 | /* reinsert comma */ |
911 | value[temp_len] = separator[0]; | |
50c2f753 SF |
912 | temp_len += 2; /* move after second comma */ |
913 | while (value[temp_len] != 0) { | |
1da177e4 | 914 | if (value[temp_len] == separator[0]) { |
50c2f753 | 915 | if (value[temp_len+1] == |
09d1db5c SF |
916 | separator[0]) { |
917 | /* skip second comma */ | |
918 | temp_len++; | |
50c2f753 | 919 | } else { |
1da177e4 LT |
920 | /* single comma indicating start |
921 | of next parm */ | |
922 | break; | |
923 | } | |
924 | } | |
925 | temp_len++; | |
926 | } | |
fb8c4b14 | 927 | if (value[temp_len] == 0) { |
1da177e4 LT |
928 | options = NULL; |
929 | } else { | |
930 | value[temp_len] = 0; | |
931 | /* point option to start of next parm */ | |
932 | options = value + temp_len + 1; | |
933 | } | |
50c2f753 | 934 | /* go from value to value + temp_len condensing |
1da177e4 LT |
935 | double commas to singles. Note that this ends up |
936 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 937 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 938 | if (vol->password == NULL) { |
50c2f753 SF |
939 | printk(KERN_WARNING "CIFS: no memory " |
940 | "for password\n"); | |
433dc24f SF |
941 | return 1; |
942 | } | |
50c2f753 | 943 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 944 | vol->password[j] = value[i]; |
fb8c4b14 | 945 | if (value[i] == separator[0] |
09d1db5c | 946 | && value[i+1] == separator[0]) { |
1da177e4 LT |
947 | /* skip second comma */ |
948 | i++; | |
949 | } | |
950 | } | |
951 | vol->password[j] = 0; | |
952 | } else { | |
e915fc49 | 953 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 954 | if (vol->password == NULL) { |
50c2f753 SF |
955 | printk(KERN_WARNING "CIFS: no memory " |
956 | "for password\n"); | |
433dc24f SF |
957 | return 1; |
958 | } | |
1da177e4 LT |
959 | strcpy(vol->password, value); |
960 | } | |
58f7f68f JL |
961 | } else if (!strnicmp(data, "ip", 2) || |
962 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
963 | if (!value || !*value) { |
964 | vol->UNCip = NULL; | |
50b64e3b JL |
965 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
966 | INET6_ADDRSTRLEN) { | |
1da177e4 LT |
967 | vol->UNCip = value; |
968 | } else { | |
50c2f753 SF |
969 | printk(KERN_WARNING "CIFS: ip address " |
970 | "too long\n"); | |
1da177e4 LT |
971 | return 1; |
972 | } | |
50c2f753 SF |
973 | } else if (strnicmp(data, "sec", 3) == 0) { |
974 | if (!value || !*value) { | |
b6b38f70 | 975 | cERROR(1, "no security value specified"); |
50c2f753 SF |
976 | continue; |
977 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
978 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 979 | CIFSSEC_MUST_SIGN; |
bf820679 | 980 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
981 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
982 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 983 | cERROR(1, "Krb5 cifs privacy not supported"); |
bf820679 SF |
984 | return 1; |
985 | } else if (strnicmp(value, "krb5", 4) == 0) { | |
750d1151 | 986 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
987 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
988 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
989 | CIFSSEC_MUST_SIGN; | |
990 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
991 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 992 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 993 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 994 | CIFSSEC_MUST_SIGN; |
bf820679 | 995 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 996 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 997 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 998 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 999 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1000 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1001 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1002 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1003 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1004 | /* BB is there a better way to do this? */ |
750d1151 | 1005 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1006 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1007 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1008 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1009 | #endif |
bf820679 | 1010 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1011 | vol->nullauth = 1; |
50c2f753 | 1012 | } else { |
b6b38f70 | 1013 | cERROR(1, "bad security option: %s", value); |
50c2f753 SF |
1014 | return 1; |
1015 | } | |
1da177e4 LT |
1016 | } else if ((strnicmp(data, "unc", 3) == 0) |
1017 | || (strnicmp(data, "target", 6) == 0) | |
1018 | || (strnicmp(data, "path", 4) == 0)) { | |
1019 | if (!value || !*value) { | |
50c2f753 SF |
1020 | printk(KERN_WARNING "CIFS: invalid path to " |
1021 | "network resource\n"); | |
1da177e4 LT |
1022 | return 1; /* needs_arg; */ |
1023 | } | |
1024 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1025 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1026 | if (vol->UNC == NULL) |
1da177e4 | 1027 | return 1; |
50c2f753 | 1028 | strcpy(vol->UNC, value); |
1da177e4 LT |
1029 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1030 | vol->UNC[0] = '\\'; | |
1031 | vol->UNC[1] = '\\'; | |
50c2f753 | 1032 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1033 | printk(KERN_WARNING |
50c2f753 SF |
1034 | "CIFS: UNC Path does not begin " |
1035 | "with // or \\\\ \n"); | |
1da177e4 LT |
1036 | return 1; |
1037 | } | |
1038 | } else { | |
1039 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1040 | return 1; | |
1041 | } | |
1042 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1043 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1044 | if (!value || !*value) { | |
1045 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
1046 | return 1; /* needs_arg; */ | |
1047 | } | |
1048 | /* BB are there cases in which a comma can be valid in | |
1049 | a domain name and need special handling? */ | |
3979877e | 1050 | if (strnlen(value, 256) < 256) { |
1da177e4 | 1051 | vol->domainname = value; |
b6b38f70 | 1052 | cFYI(1, "Domain name set"); |
1da177e4 | 1053 | } else { |
50c2f753 SF |
1054 | printk(KERN_WARNING "CIFS: domain name too " |
1055 | "long\n"); | |
1da177e4 LT |
1056 | return 1; |
1057 | } | |
3eb9a889 BG |
1058 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1059 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1060 | ||
1061 | if (!value || !*value) { | |
1062 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1063 | " not specified.\n"); | |
1064 | return 1; /* needs_arg; */ | |
1065 | } | |
1066 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1067 | value, strlen(value)); | |
b235f371 | 1068 | if (i == 0) { |
3eb9a889 BG |
1069 | printk(KERN_WARNING "CIFS: Could not parse" |
1070 | " srcaddr: %s\n", | |
1071 | value); | |
1072 | return 1; | |
1073 | } | |
50c2f753 SF |
1074 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1075 | if (!value || !*value) { | |
1076 | printk(KERN_WARNING | |
1077 | "CIFS: invalid path prefix\n"); | |
1078 | return 1; /* needs_argument */ | |
1079 | } | |
1080 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1081 | if (value[0] != '/') |
2fe87f02 | 1082 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1083 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1084 | if (vol->prepath == NULL) | |
1085 | return 1; | |
4523cc30 | 1086 | if (value[0] != '/') { |
2fe87f02 | 1087 | vol->prepath[0] = '/'; |
50c2f753 | 1088 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1089 | } else |
50c2f753 | 1090 | strcpy(vol->prepath, value); |
b6b38f70 | 1091 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1092 | } else { |
1093 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1094 | return 1; | |
1095 | } | |
1da177e4 LT |
1096 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1097 | if (!value || !*value) { | |
63135e08 SF |
1098 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1099 | "specified\n"); | |
1da177e4 LT |
1100 | return 1; /* needs_arg; */ |
1101 | } | |
1102 | if (strnlen(value, 65) < 65) { | |
50c2f753 | 1103 | if (strnicmp(value, "default", 7)) |
1da177e4 | 1104 | vol->iocharset = value; |
50c2f753 SF |
1105 | /* if iocharset not set then load_nls_default |
1106 | is used by caller */ | |
b6b38f70 | 1107 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1108 | } else { |
63135e08 SF |
1109 | printk(KERN_WARNING "CIFS: iocharset name " |
1110 | "too long.\n"); | |
1da177e4 LT |
1111 | return 1; |
1112 | } | |
9b9d6b24 JL |
1113 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1114 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1115 | uid_specified = true; | |
1116 | } else if (!strnicmp(data, "forceuid", 8)) { | |
1117 | override_uid = 1; | |
1118 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1119 | override_uid = 0; | |
1120 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1121 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1122 | gid_specified = true; | |
1123 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1124 | override_gid = 1; | |
1125 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1126 | override_gid = 0; | |
1da177e4 LT |
1127 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1128 | if (value && *value) { | |
1129 | vol->file_mode = | |
1130 | simple_strtoul(value, &value, 0); | |
1131 | } | |
1132 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1133 | if (value && *value) { | |
1134 | vol->dir_mode = | |
1135 | simple_strtoul(value, &value, 0); | |
1136 | } | |
1137 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1138 | if (value && *value) { | |
1139 | vol->dir_mode = | |
1140 | simple_strtoul(value, &value, 0); | |
1141 | } | |
1142 | } else if (strnicmp(data, "port", 4) == 0) { | |
1143 | if (value && *value) { | |
1144 | vol->port = | |
1145 | simple_strtoul(value, &value, 0); | |
1146 | } | |
1147 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1148 | if (value && *value) { | |
1149 | vol->rsize = | |
1150 | simple_strtoul(value, &value, 0); | |
1151 | } | |
1152 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1153 | if (value && *value) { | |
1154 | vol->wsize = | |
1155 | simple_strtoul(value, &value, 0); | |
1156 | } | |
1157 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1158 | if (!value || !*value) { |
b6b38f70 | 1159 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1160 | continue; |
1161 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1162 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1163 | } |
1164 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1165 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1166 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1167 | } else { |
1397f2ee JL |
1168 | memset(vol->source_rfc1001_name, 0x20, |
1169 | RFC1001_NAME_LEN); | |
1170 | /* | |
1171 | * FIXME: are there cases in which a comma can | |
1172 | * be valid in workstation netbios name (and | |
1173 | * need special handling)? | |
1174 | */ | |
1175 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1176 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1177 | if (value[i] == 0) |
1da177e4 | 1178 | break; |
1397f2ee | 1179 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1180 | } |
1181 | /* The string has 16th byte zero still from | |
1182 | set at top of the function */ | |
1397f2ee | 1183 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1184 | printk(KERN_WARNING "CIFS: netbiosname" |
1185 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1186 | } |
1187 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1188 | /* servernetbiosname specified override *SMBSERVER */ | |
1189 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1190 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1191 | } else { |
1192 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1193 | memset(vol->target_rfc1001_name, 0x20, |
1194 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1195 | |
50c2f753 | 1196 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1197 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1198 | valid in this workstation netbios name |
1199 | (and need special handling)? */ | |
a10faeb2 | 1200 | |
50c2f753 SF |
1201 | /* user or mount helper must uppercase |
1202 | the netbiosname */ | |
1203 | if (value[i] == 0) | |
a10faeb2 SF |
1204 | break; |
1205 | else | |
50c2f753 SF |
1206 | vol->target_rfc1001_name[i] = |
1207 | value[i]; | |
a10faeb2 SF |
1208 | } |
1209 | /* The string has 16th byte zero still from | |
1210 | set at top of the function */ | |
1397f2ee | 1211 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1212 | printk(KERN_WARNING "CIFS: server net" |
1213 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1214 | } |
6d20e840 SJ |
1215 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1216 | if (value && *value) { | |
1217 | vol->actimeo = HZ * simple_strtoul(value, | |
1218 | &value, 0); | |
1219 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1220 | cERROR(1, "CIFS: attribute cache" | |
1221 | "timeout too large"); | |
1222 | return 1; | |
1223 | } | |
1224 | } | |
1da177e4 LT |
1225 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1226 | /* ignore */ | |
1227 | } else if (strnicmp(data, "version", 3) == 0) { | |
1228 | /* ignore */ | |
50c2f753 | 1229 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1230 | /* ignore */ |
71a394fa SF |
1231 | } else if (strnicmp(data, "rw", 2) == 0) { |
1232 | /* ignore */ | |
1233 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1234 | /* ignore */ | |
edf1ae40 SF |
1235 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1236 | vol->noblocksnd = 1; | |
1237 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1238 | vol->noautotune = 1; | |
1da177e4 LT |
1239 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1240 | (strnicmp(data, "nosuid", 6) == 0) || | |
1241 | (strnicmp(data, "exec", 4) == 0) || | |
1242 | (strnicmp(data, "noexec", 6) == 0) || | |
1243 | (strnicmp(data, "nodev", 5) == 0) || | |
1244 | (strnicmp(data, "noauto", 6) == 0) || | |
1245 | (strnicmp(data, "dev", 3) == 0)) { | |
1246 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1247 | uses these opts to set flags, and the flags are read |
1248 | by the kernel vfs layer before we get here (ie | |
1249 | before read super) so there is no point trying to | |
1250 | parse these options again and set anything and it | |
1251 | is ok to just ignore them */ | |
1da177e4 | 1252 | continue; |
1da177e4 LT |
1253 | } else if (strnicmp(data, "hard", 4) == 0) { |
1254 | vol->retry = 1; | |
1255 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1256 | vol->retry = 0; | |
1257 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1258 | vol->noperm = 0; | |
1259 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1260 | vol->noperm = 1; | |
6a0b4824 SF |
1261 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1262 | vol->remap = 1; | |
1263 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1264 | vol->remap = 0; | |
50c2f753 SF |
1265 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1266 | vol->sfu_emul = 1; | |
1267 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1268 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1269 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1270 | vol->nodfs = 1; | |
ac67055e JA |
1271 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1272 | vol->posix_paths = 1; | |
1273 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1274 | vol->posix_paths = 0; | |
c18c842b SF |
1275 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1276 | vol->no_linux_ext = 1; | |
1277 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1278 | vol->no_linux_ext = 1; | |
50c2f753 | 1279 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1280 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1281 | vol->nocase = 1; |
f636a348 JL |
1282 | } else if (strnicmp(data, "mand", 4) == 0) { |
1283 | /* ignore */ | |
1284 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1285 | /* ignore */ | |
1286 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1287 | /* ignore */ | |
c46fa8ac SF |
1288 | } else if (strnicmp(data, "brl", 3) == 0) { |
1289 | vol->nobrl = 0; | |
50c2f753 | 1290 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1291 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1292 | vol->nobrl = 1; |
d3485d37 SF |
1293 | /* turn off mandatory locking in mode |
1294 | if remote locking is turned off since the | |
1295 | local vfs will do advisory */ | |
50c2f753 SF |
1296 | if (vol->file_mode == |
1297 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1298 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1299 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1300 | /* will take the shorter form "forcemand" as well */ | |
1301 | /* This mount option will force use of mandatory | |
1302 | (DOS/Windows style) byte range locks, instead of | |
1303 | using posix advisory byte range locks, even if the | |
1304 | Unix extensions are available and posix locks would | |
1305 | be supported otherwise. If Unix extensions are not | |
1306 | negotiated this has no effect since mandatory locks | |
1307 | would be used (mandatory locks is all that those | |
1308 | those servers support) */ | |
1309 | vol->mand_lock = 1; | |
1da177e4 LT |
1310 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1311 | vol->setuids = 1; | |
1312 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1313 | vol->setuids = 0; | |
d0a9c078 JL |
1314 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1315 | vol->dynperm = true; | |
1316 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1317 | vol->dynperm = false; | |
1da177e4 LT |
1318 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1319 | vol->retry = 0; | |
1320 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1321 | vol->retry = 1; | |
1322 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1323 | vol->intr = 0; | |
1324 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1325 | vol->intr = 1; | |
be652445 SF |
1326 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1327 | vol->nostrictsync = 1; | |
1328 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1329 | vol->nostrictsync = 0; | |
50c2f753 | 1330 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1331 | vol->server_ino = 1; |
50c2f753 | 1332 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1333 | vol->server_ino = 0; |
50c2f753 | 1334 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1335 | vol->cifs_acl = 1; |
1336 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1337 | vol->cifs_acl = 0; | |
50c2f753 | 1338 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1339 | vol->no_psx_acl = 0; |
50c2f753 | 1340 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1341 | vol->no_psx_acl = 1; |
84210e91 SF |
1342 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1343 | vol->local_lease = 1; | |
50c2f753 | 1344 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1345 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1346 | } else if (strnicmp(data, "seal", 4) == 0) { |
1347 | /* we do not do the following in secFlags because seal | |
1348 | is a per tree connection (mount) not a per socket | |
1349 | or per-smb connection option in the protocol */ | |
1350 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1351 | vol->seal = 1; | |
50c2f753 | 1352 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1353 | vol->direct_io = 1; |
50c2f753 | 1354 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1355 | vol->direct_io = 1; |
1da177e4 | 1356 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1357 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1358 | "supported. Instead set " | |
1359 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1360 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d SJ |
1361 | #ifndef CONFIG_CIFS_FSCACHE |
1362 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" | |
1363 | "kernel config option set"); | |
1364 | return 1; | |
1365 | #endif | |
fa1df75d | 1366 | vol->fsc = true; |
736a3320 SM |
1367 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1368 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1369 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1370 | vol->multiuser = true; | |
1da177e4 | 1371 | } else |
50c2f753 SF |
1372 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1373 | data); | |
1da177e4 LT |
1374 | } |
1375 | if (vol->UNC == NULL) { | |
4523cc30 | 1376 | if (devname == NULL) { |
50c2f753 SF |
1377 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1378 | "target\n"); | |
1da177e4 LT |
1379 | return 1; |
1380 | } | |
1381 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1382 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1383 | if (vol->UNC == NULL) |
1da177e4 | 1384 | return 1; |
50c2f753 | 1385 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1386 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1387 | vol->UNC[0] = '\\'; | |
1388 | vol->UNC[1] = '\\'; | |
1389 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1390 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1391 | "begin with // or \\\\ \n"); | |
1da177e4 LT |
1392 | return 1; |
1393 | } | |
7c5e628f IM |
1394 | value = strpbrk(vol->UNC+2, "/\\"); |
1395 | if (value) | |
1396 | *value = '\\'; | |
1da177e4 LT |
1397 | } else { |
1398 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1399 | return 1; | |
1400 | } | |
1401 | } | |
0eb8a132 JL |
1402 | |
1403 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1404 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1405 | "authentication!"); | |
1406 | return 1; | |
1407 | } | |
1408 | ||
fb8c4b14 | 1409 | if (vol->UNCip == NULL) |
1da177e4 LT |
1410 | vol->UNCip = &vol->UNC[2]; |
1411 | ||
9b9d6b24 JL |
1412 | if (uid_specified) |
1413 | vol->override_uid = override_uid; | |
1414 | else if (override_uid == 1) | |
1415 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1416 | "specified with no uid= option.\n"); | |
1417 | ||
1418 | if (gid_specified) | |
1419 | vol->override_gid = override_gid; | |
1420 | else if (override_gid == 1) | |
1421 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1422 | "specified with no gid= option.\n"); | |
1423 | ||
1da177e4 LT |
1424 | return 0; |
1425 | } | |
1426 | ||
3eb9a889 BG |
1427 | /** Returns true if srcaddr isn't specified and rhs isn't |
1428 | * specified, or if srcaddr is specified and | |
1429 | * matches the IP address of the rhs argument. | |
1430 | */ | |
1431 | static bool | |
1432 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1433 | { | |
1434 | switch (srcaddr->sa_family) { | |
1435 | case AF_UNSPEC: | |
1436 | return (rhs->sa_family == AF_UNSPEC); | |
1437 | case AF_INET: { | |
1438 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1439 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1440 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1441 | } | |
1442 | case AF_INET6: { | |
1443 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1444 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1445 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1446 | } | |
1447 | default: | |
1448 | WARN_ON(1); | |
1449 | return false; /* don't expect to be here */ | |
1450 | } | |
1451 | } | |
1452 | ||
4b886136 PS |
1453 | /* |
1454 | * If no port is specified in addr structure, we try to match with 445 port | |
1455 | * and if it fails - with 139 ports. It should be called only if address | |
1456 | * families of server and addr are equal. | |
1457 | */ | |
1458 | static bool | |
1459 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1460 | { | |
1461 | unsigned short int port, *sport; | |
1462 | ||
1463 | switch (addr->sa_family) { | |
1464 | case AF_INET: | |
1465 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1466 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1467 | break; | |
1468 | case AF_INET6: | |
1469 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1470 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1471 | break; | |
1472 | default: | |
1473 | WARN_ON(1); | |
1474 | return false; | |
1475 | } | |
1476 | ||
1477 | if (!port) { | |
1478 | port = htons(CIFS_PORT); | |
1479 | if (port == *sport) | |
1480 | return true; | |
1481 | ||
1482 | port = htons(RFC1001_PORT); | |
1483 | } | |
1484 | ||
1485 | return port == *sport; | |
1486 | } | |
3eb9a889 | 1487 | |
4515148e | 1488 | static bool |
3eb9a889 BG |
1489 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1490 | struct sockaddr *srcaddr) | |
4515148e | 1491 | { |
4515148e | 1492 | switch (addr->sa_family) { |
a9f1b85e PS |
1493 | case AF_INET: { |
1494 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1495 | struct sockaddr_in *srv_addr4 = | |
1496 | (struct sockaddr_in *)&server->dstaddr; | |
1497 | ||
1498 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1499 | return false; |
4515148e | 1500 | break; |
a9f1b85e PS |
1501 | } |
1502 | case AF_INET6: { | |
1503 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1504 | struct sockaddr_in6 *srv_addr6 = | |
1505 | (struct sockaddr_in6 *)&server->dstaddr; | |
1506 | ||
4515148e | 1507 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1508 | &srv_addr6->sin6_addr)) |
4515148e | 1509 | return false; |
a9f1b85e | 1510 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1511 | return false; |
4515148e JL |
1512 | break; |
1513 | } | |
a9f1b85e PS |
1514 | default: |
1515 | WARN_ON(1); | |
1516 | return false; /* don't expect to be here */ | |
1517 | } | |
4515148e | 1518 | |
3eb9a889 BG |
1519 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1520 | return false; | |
1521 | ||
4515148e JL |
1522 | return true; |
1523 | } | |
1524 | ||
daf5b0b6 JL |
1525 | static bool |
1526 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1527 | { | |
1528 | unsigned int secFlags; | |
1529 | ||
1530 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1531 | secFlags = vol->secFlg; | |
1532 | else | |
1533 | secFlags = global_secflags | vol->secFlg; | |
1534 | ||
1535 | switch (server->secType) { | |
1536 | case LANMAN: | |
1537 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1538 | return false; | |
1539 | break; | |
1540 | case NTLMv2: | |
1541 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1542 | return false; | |
1543 | break; | |
1544 | case NTLM: | |
1545 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1546 | return false; | |
1547 | break; | |
1548 | case Kerberos: | |
1549 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1550 | return false; | |
1551 | break; | |
1552 | case RawNTLMSSP: | |
1553 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1554 | return false; | |
1555 | break; | |
1556 | default: | |
1557 | /* shouldn't happen */ | |
1558 | return false; | |
1559 | } | |
1560 | ||
1561 | /* now check if signing mode is acceptible */ | |
1562 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && | |
1563 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1564 | return false; | |
1565 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1566 | (server->secMode & | |
1567 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1568 | return false; | |
1569 | ||
1570 | return true; | |
1571 | } | |
1572 | ||
e7ddee90 | 1573 | static struct TCP_Server_Info * |
daf5b0b6 | 1574 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1575 | { |
e7ddee90 | 1576 | struct TCP_Server_Info *server; |
e7ddee90 | 1577 | |
3f9bcca7 | 1578 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1579 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
3eb9a889 BG |
1580 | if (!match_address(server, addr, |
1581 | (struct sockaddr *)&vol->srcaddr)) | |
4515148e | 1582 | continue; |
1b20d672 | 1583 | |
4b886136 PS |
1584 | if (!match_port(server, addr)) |
1585 | continue; | |
1586 | ||
daf5b0b6 JL |
1587 | if (!match_security(server, vol)) |
1588 | continue; | |
1589 | ||
e7ddee90 | 1590 | ++server->srv_count; |
3f9bcca7 | 1591 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1592 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1593 | return server; |
1da177e4 | 1594 | } |
3f9bcca7 | 1595 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1596 | return NULL; |
1597 | } | |
1b20d672 | 1598 | |
14fbf50d | 1599 | static void |
e7ddee90 | 1600 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1601 | { |
e7ddee90 | 1602 | struct task_struct *task; |
1b20d672 | 1603 | |
3f9bcca7 | 1604 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1605 | if (--server->srv_count > 0) { |
3f9bcca7 | 1606 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1607 | return; |
1da177e4 | 1608 | } |
1b20d672 | 1609 | |
e7ddee90 | 1610 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1611 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1612 | |
e7ddee90 JL |
1613 | spin_lock(&GlobalMid_Lock); |
1614 | server->tcpStatus = CifsExiting; | |
1615 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1616 | |
d2b91521 | 1617 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1618 | cifs_fscache_release_client_cookie(server); |
1619 | ||
21e73393 SP |
1620 | kfree(server->session_key.response); |
1621 | server->session_key.response = NULL; | |
1622 | server->session_key.len = 0; | |
1623 | ||
e7ddee90 JL |
1624 | task = xchg(&server->tsk, NULL); |
1625 | if (task) | |
1626 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1627 | } |
1628 | ||
63c038c2 JL |
1629 | static struct TCP_Server_Info * |
1630 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1631 | { | |
1632 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1633 | struct sockaddr_storage addr; |
63c038c2 JL |
1634 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1635 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1636 | int rc; | |
1637 | ||
a9ac49d3 | 1638 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1639 | |
b6b38f70 | 1640 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1641 | |
1e68b2b2 | 1642 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1643 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1644 | volume_info->UNCip, | |
67b7626a | 1645 | strlen(volume_info->UNCip), |
50d97160 | 1646 | volume_info->port); |
1e68b2b2 | 1647 | if (!rc) { |
63c038c2 JL |
1648 | /* we failed translating address */ |
1649 | rc = -EINVAL; | |
1650 | goto out_err; | |
1651 | } | |
63c038c2 JL |
1652 | } else if (volume_info->UNCip) { |
1653 | /* BB using ip addr as tcp_ses name to connect to the | |
1654 | DFS root below */ | |
b6b38f70 | 1655 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1656 | rc = -EINVAL; |
1657 | goto out_err; | |
1658 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1659 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1660 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1661 | rc = -EINVAL; |
1662 | goto out_err; | |
1663 | } | |
1664 | ||
1665 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1666 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1667 | if (tcp_ses) |
1668 | return tcp_ses; | |
1669 | ||
1670 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1671 | if (!tcp_ses) { | |
1672 | rc = -ENOMEM; | |
1673 | goto out_err; | |
1674 | } | |
1675 | ||
d2b91521 SP |
1676 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1677 | if (rc) { | |
1678 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1679 | goto out_err; | |
1680 | } | |
1681 | ||
63c038c2 JL |
1682 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1683 | if (IS_ERR(tcp_ses->hostname)) { | |
1684 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1685 | goto out_err_crypto_release; |
63c038c2 JL |
1686 | } |
1687 | ||
1688 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1689 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1690 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1691 | atomic_set(&tcp_ses->inFlight, 0); |
1692 | init_waitqueue_head(&tcp_ses->response_q); | |
1693 | init_waitqueue_head(&tcp_ses->request_q); | |
1694 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1695 | mutex_init(&tcp_ses->srv_mutex); | |
1696 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1697 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1698 | memcpy(tcp_ses->server_RFC1001_name, | |
1699 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1700 | tcp_ses->session_estab = false; |
63c038c2 JL |
1701 | tcp_ses->sequence_number = 0; |
1702 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); | |
1703 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
1704 | ||
1705 | /* | |
1706 | * at this point we are the only ones with the pointer | |
1707 | * to the struct since the kernel thread not created yet | |
1708 | * no need to spinlock this init of tcpStatus or srv_count | |
1709 | */ | |
1710 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1711 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1712 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1713 | ++tcp_ses->srv_count; |
1714 | ||
a9ac49d3 | 1715 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1716 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1717 | /* BB should we allow ipv6 on port 139? */ |
1718 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1719 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1720 | sizeof(struct sockaddr_in6)); | |
1721 | } else | |
1722 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1723 | sizeof(struct sockaddr_in)); | |
1724 | ||
1725 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1726 | if (rc < 0) { |
b6b38f70 | 1727 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1728 | goto out_err_crypto_release; |
63c038c2 JL |
1729 | } |
1730 | ||
1731 | /* | |
1732 | * since we're in a cifs function already, we know that | |
1733 | * this will succeed. No need for try_module_get(). | |
1734 | */ | |
1735 | __module_get(THIS_MODULE); | |
1736 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1737 | tcp_ses, "cifsd"); | |
1738 | if (IS_ERR(tcp_ses->tsk)) { | |
1739 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1740 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1741 | module_put(THIS_MODULE); |
f7c5445a | 1742 | goto out_err_crypto_release; |
63c038c2 JL |
1743 | } |
1744 | ||
1745 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1746 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1747 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1748 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1749 | |
488f1d2d SJ |
1750 | cifs_fscache_get_client_cookie(tcp_ses); |
1751 | ||
63c038c2 JL |
1752 | return tcp_ses; |
1753 | ||
f7c5445a | 1754 | out_err_crypto_release: |
d2b91521 SP |
1755 | cifs_crypto_shash_release(tcp_ses); |
1756 | ||
63c038c2 JL |
1757 | out_err: |
1758 | if (tcp_ses) { | |
8347a5cd SF |
1759 | if (!IS_ERR(tcp_ses->hostname)) |
1760 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1761 | if (tcp_ses->ssocket) |
1762 | sock_release(tcp_ses->ssocket); | |
1763 | kfree(tcp_ses); | |
1764 | } | |
1765 | return ERR_PTR(rc); | |
1766 | } | |
1767 | ||
14fbf50d | 1768 | static struct cifsSesInfo * |
4ff67b72 | 1769 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1770 | { |
14fbf50d | 1771 | struct cifsSesInfo *ses; |
dea570e0 | 1772 | |
3f9bcca7 | 1773 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 JL |
1774 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
1775 | switch (server->secType) { | |
1776 | case Kerberos: | |
3e4b3e1f | 1777 | if (vol->cred_uid != ses->cred_uid) |
4ff67b72 JL |
1778 | continue; |
1779 | break; | |
1780 | default: | |
1781 | /* anything else takes username/password */ | |
1782 | if (strncmp(ses->userName, vol->username, | |
1783 | MAX_USERNAME_SIZE)) | |
1784 | continue; | |
1785 | if (strlen(vol->username) != 0 && | |
24e6cf92 | 1786 | ses->password != NULL && |
fc87a406 JL |
1787 | strncmp(ses->password, |
1788 | vol->password ? vol->password : "", | |
4ff67b72 JL |
1789 | MAX_PASSWORD_SIZE)) |
1790 | continue; | |
1791 | } | |
14fbf50d | 1792 | ++ses->ses_count; |
3f9bcca7 | 1793 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1794 | return ses; |
1795 | } | |
3f9bcca7 | 1796 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1797 | return NULL; |
1798 | } | |
dea570e0 | 1799 | |
14fbf50d JL |
1800 | static void |
1801 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1802 | { | |
1803 | int xid; | |
1804 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1805 | |
36988c76 | 1806 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1807 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1808 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1809 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1810 | return; |
1811 | } | |
dea570e0 | 1812 | |
14fbf50d | 1813 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1814 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1815 | |
14fbf50d JL |
1816 | if (ses->status == CifsGood) { |
1817 | xid = GetXid(); | |
1818 | CIFSSMBLogoff(xid, ses); | |
1819 | _FreeXid(xid); | |
1820 | } | |
1821 | sesInfoFree(ses); | |
1822 | cifs_put_tcp_session(server); | |
1823 | } | |
dea570e0 | 1824 | |
36988c76 JL |
1825 | static struct cifsSesInfo * |
1826 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1827 | { | |
1828 | int rc = -ENOMEM, xid; | |
1829 | struct cifsSesInfo *ses; | |
a9f1b85e PS |
1830 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1831 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1832 | |
1833 | xid = GetXid(); | |
1834 | ||
4ff67b72 | 1835 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1836 | if (ses) { |
1837 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1838 | ||
36988c76 | 1839 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1840 | rc = cifs_negotiate_protocol(xid, ses); |
1841 | if (rc) { | |
1842 | mutex_unlock(&ses->session_mutex); | |
1843 | /* problem -- put our ses reference */ | |
1844 | cifs_put_smb_ses(ses); | |
1845 | FreeXid(xid); | |
1846 | return ERR_PTR(rc); | |
1847 | } | |
36988c76 JL |
1848 | if (ses->need_reconnect) { |
1849 | cFYI(1, "Session needs reconnect"); | |
1850 | rc = cifs_setup_session(xid, ses, | |
1851 | volume_info->local_nls); | |
1852 | if (rc) { | |
1853 | mutex_unlock(&ses->session_mutex); | |
1854 | /* problem -- put our reference */ | |
1855 | cifs_put_smb_ses(ses); | |
1856 | FreeXid(xid); | |
1857 | return ERR_PTR(rc); | |
1858 | } | |
1859 | } | |
1860 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1861 | |
1862 | /* existing SMB ses has a server reference already */ | |
1863 | cifs_put_tcp_session(server); | |
36988c76 JL |
1864 | FreeXid(xid); |
1865 | return ses; | |
1866 | } | |
1867 | ||
1868 | cFYI(1, "Existing smb sess not found"); | |
1869 | ses = sesInfoAlloc(); | |
1870 | if (ses == NULL) | |
1871 | goto get_ses_fail; | |
1872 | ||
1873 | /* new SMB session uses our server ref */ | |
1874 | ses->server = server; | |
a9f1b85e PS |
1875 | if (server->dstaddr.ss_family == AF_INET6) |
1876 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 1877 | else |
a9f1b85e | 1878 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 JL |
1879 | |
1880 | if (volume_info->username) | |
1881 | strncpy(ses->userName, volume_info->username, | |
1882 | MAX_USERNAME_SIZE); | |
1883 | ||
1884 | /* volume_info->password freed at unmount */ | |
1885 | if (volume_info->password) { | |
1886 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1887 | if (!ses->password) | |
1888 | goto get_ses_fail; | |
1889 | } | |
1890 | if (volume_info->domainname) { | |
d3686d54 SP |
1891 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
1892 | if (!ses->domainName) | |
1893 | goto get_ses_fail; | |
36988c76 | 1894 | } |
3e4b3e1f | 1895 | ses->cred_uid = volume_info->cred_uid; |
36988c76 JL |
1896 | ses->linux_uid = volume_info->linux_uid; |
1897 | ses->overrideSecFlg = volume_info->secFlg; | |
1898 | ||
1899 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
1900 | rc = cifs_negotiate_protocol(xid, ses); |
1901 | if (!rc) | |
1902 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 1903 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 1904 | if (rc) |
36988c76 JL |
1905 | goto get_ses_fail; |
1906 | ||
1907 | /* success, put it on the list */ | |
3f9bcca7 | 1908 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 1909 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 1910 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
1911 | |
1912 | FreeXid(xid); | |
1913 | return ses; | |
1914 | ||
1915 | get_ses_fail: | |
1916 | sesInfoFree(ses); | |
1917 | FreeXid(xid); | |
1918 | return ERR_PTR(rc); | |
1919 | } | |
1920 | ||
f1987b44 JL |
1921 | static struct cifsTconInfo * |
1922 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
1923 | { | |
1924 | struct list_head *tmp; | |
1925 | struct cifsTconInfo *tcon; | |
1926 | ||
3f9bcca7 | 1927 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1928 | list_for_each(tmp, &ses->tcon_list) { |
1929 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
1930 | if (tcon->tidStatus == CifsExiting) | |
1931 | continue; | |
1932 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
dea570e0 SF |
1933 | continue; |
1934 | ||
f1987b44 | 1935 | ++tcon->tc_count; |
3f9bcca7 | 1936 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1937 | return tcon; |
1da177e4 | 1938 | } |
3f9bcca7 | 1939 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1940 | return NULL; |
1941 | } | |
1942 | ||
f1987b44 JL |
1943 | static void |
1944 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
1945 | { | |
1946 | int xid; | |
1947 | struct cifsSesInfo *ses = tcon->ses; | |
1948 | ||
d00c28de | 1949 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 1950 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 1951 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 1952 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1953 | return; |
1954 | } | |
1955 | ||
1956 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 1957 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1958 | |
1959 | xid = GetXid(); | |
1960 | CIFSSMBTDis(xid, tcon); | |
1961 | _FreeXid(xid); | |
1962 | ||
d03382ce | 1963 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 1964 | tconInfoFree(tcon); |
f1987b44 JL |
1965 | cifs_put_smb_ses(ses); |
1966 | } | |
1967 | ||
d00c28de JL |
1968 | static struct cifsTconInfo * |
1969 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
1970 | { | |
1971 | int rc, xid; | |
1972 | struct cifsTconInfo *tcon; | |
1973 | ||
1974 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
1975 | if (tcon) { | |
1976 | cFYI(1, "Found match on UNC path"); | |
1977 | /* existing tcon already has a reference */ | |
1978 | cifs_put_smb_ses(ses); | |
1979 | if (tcon->seal != volume_info->seal) | |
1980 | cERROR(1, "transport encryption setting " | |
1981 | "conflicts with existing tid"); | |
1982 | return tcon; | |
1983 | } | |
1984 | ||
1985 | tcon = tconInfoAlloc(); | |
1986 | if (tcon == NULL) { | |
1987 | rc = -ENOMEM; | |
1988 | goto out_fail; | |
1989 | } | |
1990 | ||
1991 | tcon->ses = ses; | |
1992 | if (volume_info->password) { | |
1993 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1994 | if (!tcon->password) { | |
1995 | rc = -ENOMEM; | |
1996 | goto out_fail; | |
1997 | } | |
1998 | } | |
1999 | ||
2000 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2001 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2002 | cERROR(1, "Missing share name"); | |
2003 | rc = -ENODEV; | |
2004 | goto out_fail; | |
2005 | } | |
2006 | ||
2007 | /* BB Do we need to wrap session_mutex around | |
2008 | * this TCon call and Unix SetFS as | |
2009 | * we do on SessSetup and reconnect? */ | |
2010 | xid = GetXid(); | |
2011 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2012 | FreeXid(xid); | |
2013 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2014 | if (rc) | |
2015 | goto out_fail; | |
2016 | ||
2017 | if (volume_info->nodfs) { | |
2018 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2019 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2020 | } | |
2021 | tcon->seal = volume_info->seal; | |
2022 | /* we can have only one retry value for a connection | |
2023 | to a share so for resources mounted more than once | |
2024 | to the same server share the last value passed in | |
2025 | for the retry flag is used */ | |
2026 | tcon->retry = volume_info->retry; | |
2027 | tcon->nocase = volume_info->nocase; | |
2028 | tcon->local_lease = volume_info->local_lease; | |
2029 | ||
3f9bcca7 | 2030 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2031 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2032 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2033 | |
d03382ce SJ |
2034 | cifs_fscache_get_super_cookie(tcon); |
2035 | ||
d00c28de JL |
2036 | return tcon; |
2037 | ||
2038 | out_fail: | |
2039 | tconInfoFree(tcon); | |
2040 | return ERR_PTR(rc); | |
2041 | } | |
2042 | ||
9d002df4 JL |
2043 | void |
2044 | cifs_put_tlink(struct tcon_link *tlink) | |
2045 | { | |
2046 | if (!tlink || IS_ERR(tlink)) | |
2047 | return; | |
2048 | ||
2049 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2050 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2051 | tlink->tl_time = jiffies; | |
2052 | return; | |
2053 | } | |
2054 | ||
2055 | if (!IS_ERR(tlink_tcon(tlink))) | |
2056 | cifs_put_tcon(tlink_tcon(tlink)); | |
2057 | kfree(tlink); | |
2058 | return; | |
2059 | } | |
d00c28de | 2060 | |
1da177e4 | 2061 | int |
50c2f753 SF |
2062 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
2063 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 2064 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2065 | { |
2066 | char *temp_unc; | |
2067 | int rc = 0; | |
2068 | ||
2069 | *pnum_referrals = 0; | |
366781c1 | 2070 | *preferrals = NULL; |
1da177e4 LT |
2071 | |
2072 | if (pSesInfo->ipc_tid == 0) { | |
2073 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2074 | strnlen(pSesInfo->serverName, |
2075 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2076 | + 1 + 4 /* slash IPC$ */ + 2, |
2077 | GFP_KERNEL); | |
2078 | if (temp_unc == NULL) | |
2079 | return -ENOMEM; | |
2080 | temp_unc[0] = '\\'; | |
2081 | temp_unc[1] = '\\'; | |
2082 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2083 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2084 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2085 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2086 | kfree(temp_unc); |
2087 | } | |
2088 | if (rc == 0) | |
c2cf07d5 | 2089 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2090 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2091 | /* BB map targetUNCs to dfs_info3 structures, here or |
2092 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2093 | |
2094 | return rc; | |
2095 | } | |
2096 | ||
09e50d55 JL |
2097 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2098 | static struct lock_class_key cifs_key[2]; | |
2099 | static struct lock_class_key cifs_slock_key[2]; | |
2100 | ||
2101 | static inline void | |
2102 | cifs_reclassify_socket4(struct socket *sock) | |
2103 | { | |
2104 | struct sock *sk = sock->sk; | |
2105 | BUG_ON(sock_owned_by_user(sk)); | |
2106 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2107 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2108 | } | |
2109 | ||
2110 | static inline void | |
2111 | cifs_reclassify_socket6(struct socket *sock) | |
2112 | { | |
2113 | struct sock *sk = sock->sk; | |
2114 | BUG_ON(sock_owned_by_user(sk)); | |
2115 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2116 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2117 | } | |
2118 | #else | |
2119 | static inline void | |
2120 | cifs_reclassify_socket4(struct socket *sock) | |
2121 | { | |
2122 | } | |
2123 | ||
2124 | static inline void | |
2125 | cifs_reclassify_socket6(struct socket *sock) | |
2126 | { | |
2127 | } | |
2128 | #endif | |
2129 | ||
1da177e4 | 2130 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2131 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2132 | { |
50c2f753 | 2133 | unsigned int i, j; |
1da177e4 | 2134 | |
50c2f753 | 2135 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2136 | /* mask a nibble at a time and encode */ |
2137 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2138 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2139 | j += 2; |
1da177e4 LT |
2140 | } |
2141 | ||
2142 | } | |
2143 | ||
3eb9a889 BG |
2144 | static int |
2145 | bind_socket(struct TCP_Server_Info *server) | |
2146 | { | |
2147 | int rc = 0; | |
2148 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2149 | /* Bind to the specified local IP address */ | |
2150 | struct socket *socket = server->ssocket; | |
2151 | rc = socket->ops->bind(socket, | |
2152 | (struct sockaddr *) &server->srcaddr, | |
2153 | sizeof(server->srcaddr)); | |
2154 | if (rc < 0) { | |
2155 | struct sockaddr_in *saddr4; | |
2156 | struct sockaddr_in6 *saddr6; | |
2157 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2158 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2159 | if (saddr6->sin6_family == AF_INET6) | |
2160 | cERROR(1, "cifs: " | |
2161 | "Failed to bind to: %pI6c, error: %d\n", | |
2162 | &saddr6->sin6_addr, rc); | |
2163 | else | |
2164 | cERROR(1, "cifs: " | |
2165 | "Failed to bind to: %pI4, error: %d\n", | |
2166 | &saddr4->sin_addr.s_addr, rc); | |
2167 | } | |
2168 | } | |
2169 | return rc; | |
2170 | } | |
1da177e4 LT |
2171 | |
2172 | static int | |
a9f1b85e | 2173 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2174 | { |
2175 | int rc = 0; | |
a9f1b85e PS |
2176 | /* |
2177 | * some servers require RFC1001 sessinit before sending | |
2178 | * negprot - BB check reconnection in case where second | |
2179 | * sessinit is sent but no second negprot | |
2180 | */ | |
2181 | struct rfc1002_session_packet *ses_init_buf; | |
2182 | struct smb_hdr *smb_buf; | |
2183 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2184 | GFP_KERNEL); | |
2185 | if (ses_init_buf) { | |
2186 | ses_init_buf->trailer.session_req.called_len = 32; | |
2187 | ||
2188 | if (server->server_RFC1001_name && | |
2189 | server->server_RFC1001_name[0] != 0) | |
2190 | rfc1002mangle(ses_init_buf->trailer. | |
2191 | session_req.called_name, | |
2192 | server->server_RFC1001_name, | |
2193 | RFC1001_NAME_LEN_WITH_NULL); | |
2194 | else | |
2195 | rfc1002mangle(ses_init_buf->trailer. | |
2196 | session_req.called_name, | |
2197 | DEFAULT_CIFS_CALLED_NAME, | |
2198 | RFC1001_NAME_LEN_WITH_NULL); | |
2199 | ||
2200 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2201 | ||
2202 | /* | |
2203 | * calling name ends in null (byte 16) from old smb | |
2204 | * convention. | |
2205 | */ | |
2206 | if (server->workstation_RFC1001_name && | |
2207 | server->workstation_RFC1001_name[0] != 0) | |
2208 | rfc1002mangle(ses_init_buf->trailer. | |
2209 | session_req.calling_name, | |
2210 | server->workstation_RFC1001_name, | |
2211 | RFC1001_NAME_LEN_WITH_NULL); | |
2212 | else | |
2213 | rfc1002mangle(ses_init_buf->trailer. | |
2214 | session_req.calling_name, | |
2215 | "LINUX_CIFS_CLNT", | |
2216 | RFC1001_NAME_LEN_WITH_NULL); | |
2217 | ||
2218 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2219 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2220 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2221 | ||
2222 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
2223 | smb_buf->smb_buf_length = 0x81000044; | |
2224 | rc = smb_send(server, smb_buf, 0x44); | |
2225 | kfree(ses_init_buf); | |
2226 | /* | |
2227 | * RFC1001 layer in at least one server | |
2228 | * requires very short break before negprot | |
2229 | * presumably because not expecting negprot | |
2230 | * to follow so fast. This is a simple | |
2231 | * solution that works without | |
2232 | * complicating the code and causes no | |
2233 | * significant slowing down on mount | |
2234 | * for everyone else | |
2235 | */ | |
2236 | usleep_range(1000, 2000); | |
2237 | } | |
2238 | /* | |
2239 | * else the negprot may still work without this | |
2240 | * even though malloc failed | |
2241 | */ | |
2242 | ||
2243 | return rc; | |
2244 | } | |
2245 | ||
2246 | static int | |
2247 | generic_ip_connect(struct TCP_Server_Info *server) | |
2248 | { | |
2249 | int rc = 0; | |
2250 | unsigned short int sport; | |
2251 | int slen, sfamily; | |
bcf4b106 | 2252 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2253 | struct sockaddr *saddr; |
2254 | ||
2255 | saddr = (struct sockaddr *) &server->dstaddr; | |
2256 | ||
2257 | if (server->dstaddr.ss_family == AF_INET6) { | |
2258 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2259 | slen = sizeof(struct sockaddr_in6); | |
2260 | sfamily = AF_INET6; | |
2261 | } else { | |
2262 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2263 | slen = sizeof(struct sockaddr_in); | |
2264 | sfamily = AF_INET; | |
2265 | } | |
1da177e4 | 2266 | |
bcf4b106 | 2267 | if (socket == NULL) { |
a9f1b85e | 2268 | rc = sock_create_kern(sfamily, SOCK_STREAM, |
bcf4b106 | 2269 | IPPROTO_TCP, &socket); |
1da177e4 | 2270 | if (rc < 0) { |
b6b38f70 | 2271 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2272 | server->ssocket = NULL; |
1da177e4 | 2273 | return rc; |
1da177e4 | 2274 | } |
bcf4b106 JL |
2275 | |
2276 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2277 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2278 | server->ssocket = socket; |
2279 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2280 | if (sfamily == AF_INET6) |
2281 | cifs_reclassify_socket6(socket); | |
2282 | else | |
2283 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2284 | } |
2285 | ||
3eb9a889 BG |
2286 | rc = bind_socket(server); |
2287 | if (rc < 0) | |
2288 | return rc; | |
2289 | ||
a9f1b85e PS |
2290 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2291 | if (rc < 0) { | |
2292 | cFYI(1, "Error %d connecting to server", rc); | |
bcf4b106 JL |
2293 | sock_release(socket); |
2294 | server->ssocket = NULL; | |
1da177e4 LT |
2295 | return rc; |
2296 | } | |
bcf4b106 | 2297 | |
bcf4b106 JL |
2298 | /* |
2299 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2300 | * the default. sock_setsockopt not used because it expects |
2301 | * user space buffer | |
bcf4b106 JL |
2302 | */ |
2303 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2304 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2305 | |
b387eaeb | 2306 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2307 | if (server->noautotune) { |
2308 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2309 | socket->sk->sk_sndbuf = 200 * 1024; | |
2310 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2311 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2312 | } |
1da177e4 | 2313 | |
6a5fa236 | 2314 | if (server->tcp_nodelay) { |
a9f1b85e | 2315 | int val = 1; |
6a5fa236 SF |
2316 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2317 | (char *)&val, sizeof(val)); | |
2318 | if (rc) | |
b6b38f70 | 2319 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2320 | } |
2321 | ||
b6b38f70 | 2322 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2323 | socket->sk->sk_sndbuf, |
b6b38f70 | 2324 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2325 | |
a9f1b85e PS |
2326 | if (sport == htons(RFC1001_PORT)) |
2327 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2328 | |
1da177e4 LT |
2329 | return rc; |
2330 | } | |
2331 | ||
2332 | static int | |
a9f1b85e | 2333 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2334 | { |
a9f1b85e PS |
2335 | unsigned short int *sport; |
2336 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2337 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2338 | |
a9f1b85e PS |
2339 | if (server->dstaddr.ss_family == AF_INET6) |
2340 | sport = &addr6->sin6_port; | |
2341 | else | |
2342 | sport = &addr->sin_port; | |
1da177e4 | 2343 | |
a9f1b85e PS |
2344 | if (*sport == 0) { |
2345 | int rc; | |
1da177e4 | 2346 | |
a9f1b85e PS |
2347 | /* try with 445 port at first */ |
2348 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2349 | |
a9f1b85e | 2350 | rc = generic_ip_connect(server); |
1da177e4 | 2351 | if (rc >= 0) |
a9f1b85e | 2352 | return rc; |
6a5fa236 | 2353 | |
a9f1b85e PS |
2354 | /* if it failed, try with 139 port */ |
2355 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2356 | } |
2357 | ||
a9f1b85e | 2358 | return generic_ip_connect(server); |
1da177e4 LT |
2359 | } |
2360 | ||
50c2f753 SF |
2361 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2362 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2363 | { |
2364 | /* if we are reconnecting then should we check to see if | |
2365 | * any requested capabilities changed locally e.g. via | |
2366 | * remount but we can not do much about it here | |
2367 | * if they have (even if we could detect it by the following) | |
2368 | * Perhaps we could add a backpointer to array of sb from tcon | |
2369 | * or if we change to make all sb to same share the same | |
2370 | * sb as NFS - then we only have one backpointer to sb. | |
2371 | * What if we wanted to mount the server share twice once with | |
2372 | * and once without posixacls or posix paths? */ | |
2373 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2374 | |
c18c842b SF |
2375 | if (vol_info && vol_info->no_linux_ext) { |
2376 | tcon->fsUnixInfo.Capability = 0; | |
2377 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2378 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2379 | return; |
2380 | } else if (vol_info) | |
2381 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2382 | ||
2383 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2384 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2385 | return; |
2386 | } | |
50c2f753 | 2387 | |
fb8c4b14 | 2388 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2389 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
50c2f753 | 2390 | |
8af18971 SF |
2391 | /* check for reconnect case in which we do not |
2392 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2393 | if (vol_info == NULL) { |
50c2f753 | 2394 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2395 | originally at mount time */ |
2396 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2397 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2398 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2399 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2400 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2401 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2402 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2403 | cERROR(1, "possible reconnect error"); |
2404 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2405 | } |
8af18971 | 2406 | } |
50c2f753 | 2407 | |
8af18971 | 2408 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2409 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2410 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2411 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2412 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2413 | if (sb) |
8af18971 SF |
2414 | sb->s_flags |= MS_POSIXACL; |
2415 | } | |
2416 | ||
75865f8c | 2417 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2418 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2419 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2420 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2421 | if (sb) |
50c2f753 | 2422 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2423 | CIFS_MOUNT_POSIX_PATHS; |
2424 | } | |
50c2f753 | 2425 | |
984acfe1 SF |
2426 | /* We might be setting the path sep back to a different |
2427 | form if we are reconnecting and the server switched its | |
50c2f753 | 2428 | posix path capability for this share */ |
75865f8c | 2429 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2430 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2431 | |
2432 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2433 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2434 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2435 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2436 | } |
2437 | } | |
50c2f753 SF |
2438 | |
2439 | ||
b6b38f70 | 2440 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2441 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2442 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2443 | cFYI(1, "FCNTL cap"); |
75865f8c | 2444 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2445 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2446 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2447 | cFYI(1, "POSIX path cap"); |
75865f8c | 2448 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2449 | cFYI(1, "XATTR cap"); |
75865f8c | 2450 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2451 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2452 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2453 | cFYI(1, "very large read cap"); |
75865f8c | 2454 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2455 | cFYI(1, "very large write cap"); |
8af18971 SF |
2456 | #endif /* CIFS_DEBUG2 */ |
2457 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2458 | if (vol_info == NULL) { |
b6b38f70 | 2459 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2460 | } else |
b6b38f70 | 2461 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2462 | "with the server failed. Consider " |
2463 | "mounting with the Unix Extensions\n" | |
2464 | "disabled, if problems are found, " | |
2465 | "by specifying the nounix mount " | |
b6b38f70 | 2466 | "option."); |
5a44b319 | 2467 | |
8af18971 SF |
2468 | } |
2469 | } | |
2470 | } | |
2471 | ||
03a143c9 SF |
2472 | static void |
2473 | convert_delimiter(char *path, char delim) | |
2474 | { | |
2475 | int i; | |
c2d68ea6 | 2476 | char old_delim; |
03a143c9 SF |
2477 | |
2478 | if (path == NULL) | |
2479 | return; | |
2480 | ||
582d21e5 | 2481 | if (delim == '/') |
c2d68ea6 SF |
2482 | old_delim = '\\'; |
2483 | else | |
2484 | old_delim = '/'; | |
2485 | ||
03a143c9 | 2486 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2487 | if (path[i] == old_delim) |
03a143c9 SF |
2488 | path[i] = delim; |
2489 | } | |
2490 | } | |
2491 | ||
3b795210 SF |
2492 | static void setup_cifs_sb(struct smb_vol *pvolume_info, |
2493 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2494 | { |
2de970ff JL |
2495 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2496 | ||
3b795210 | 2497 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2498 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2499 | pvolume_info->rsize); | |
3b795210 SF |
2500 | cifs_sb->rsize = CIFSMaxBufSize; |
2501 | } else if ((pvolume_info->rsize) && | |
2502 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2503 | cifs_sb->rsize = pvolume_info->rsize; | |
2504 | else /* default */ | |
2505 | cifs_sb->rsize = CIFSMaxBufSize; | |
2506 | ||
2507 | if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) { | |
b6b38f70 JP |
2508 | cERROR(1, "wsize %d too large, using 4096 instead", |
2509 | pvolume_info->wsize); | |
3b795210 SF |
2510 | cifs_sb->wsize = 4096; |
2511 | } else if (pvolume_info->wsize) | |
2512 | cifs_sb->wsize = pvolume_info->wsize; | |
2513 | else | |
2514 | cifs_sb->wsize = min_t(const int, | |
2515 | PAGEVEC_SIZE * PAGE_CACHE_SIZE, | |
2516 | 127*1024); | |
2517 | /* old default of CIFSMaxBufSize was too small now | |
2518 | that SMB Write2 can send multiple pages in kvec. | |
2519 | RFC1001 does not describe what happens when frame | |
2520 | bigger than 128K is sent so use that as max in | |
2521 | conjunction with 52K kvec constraint on arch with 4K | |
2522 | page size */ | |
2523 | ||
2524 | if (cifs_sb->rsize < 2048) { | |
2525 | cifs_sb->rsize = 2048; | |
2526 | /* Windows ME may prefer this */ | |
b6b38f70 | 2527 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2528 | } |
2529 | /* calculate prepath */ | |
2530 | cifs_sb->prepath = pvolume_info->prepath; | |
2531 | if (cifs_sb->prepath) { | |
2532 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2533 | /* we can not convert the / to \ in the path | |
2534 | separators in the prefixpath yet because we do not | |
2535 | know (until reset_cifs_unix_caps is called later) | |
2536 | whether POSIX PATH CAP is available. We normalize | |
2537 | the / to \ after reset_cifs_unix_caps is called */ | |
2538 | pvolume_info->prepath = NULL; | |
2539 | } else | |
2540 | cifs_sb->prepathlen = 0; | |
2541 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2542 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2543 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2544 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2545 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2546 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2547 | |
6d20e840 SJ |
2548 | cifs_sb->actimeo = pvolume_info->actimeo; |
2549 | ||
3b795210 SF |
2550 | if (pvolume_info->noperm) |
2551 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2552 | if (pvolume_info->setuids) | |
2553 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2554 | if (pvolume_info->server_ino) | |
2555 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2556 | if (pvolume_info->remap) | |
2557 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2558 | if (pvolume_info->no_xattr) | |
2559 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2560 | if (pvolume_info->sfu_emul) | |
2561 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2562 | if (pvolume_info->nobrl) | |
2563 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2564 | if (pvolume_info->nostrictsync) |
4717bed6 | 2565 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2566 | if (pvolume_info->mand_lock) |
2567 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2568 | if (pvolume_info->cifs_acl) |
2569 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2570 | if (pvolume_info->override_uid) | |
2571 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2572 | if (pvolume_info->override_gid) | |
2573 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2574 | if (pvolume_info->dynperm) | |
2575 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2576 | if (pvolume_info->fsc) |
2577 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2578 | if (pvolume_info->multiuser) |
2579 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2580 | CIFS_MOUNT_NO_PERM); | |
3b795210 | 2581 | if (pvolume_info->direct_io) { |
b6b38f70 | 2582 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2583 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2584 | } | |
736a3320 SM |
2585 | if (pvolume_info->mfsymlinks) { |
2586 | if (pvolume_info->sfu_emul) { | |
2587 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2588 | "mount option is used"); | |
2589 | } else { | |
2590 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2591 | } | |
2592 | } | |
3b795210 SF |
2593 | |
2594 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2595 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2596 | "mount option supported"); | |
b1c8d2b4 JL |
2597 | } |
2598 | ||
e4cce94c IM |
2599 | static int |
2600 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2601 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2602 | { | |
2603 | int rc; | |
e4cce94c IM |
2604 | FILE_ALL_INFO *pfile_info; |
2605 | ||
e4cce94c IM |
2606 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2607 | if (pfile_info == NULL) | |
2608 | return -ENOMEM; | |
2609 | ||
2610 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2611 | 0 /* not legacy */, cifs_sb->local_nls, | |
2612 | cifs_sb->mnt_cifs_flags & | |
2613 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2614 | kfree(pfile_info); | |
2615 | return rc; | |
2616 | } | |
2617 | ||
1bfe73c2 IM |
2618 | static void |
2619 | cleanup_volume_info(struct smb_vol **pvolume_info) | |
2620 | { | |
2621 | struct smb_vol *volume_info; | |
2622 | ||
ad6cca6d | 2623 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2624 | return; |
2625 | ||
2626 | volume_info = *pvolume_info; | |
2627 | kzfree(volume_info->password); | |
2628 | kfree(volume_info->UNC); | |
2629 | kfree(volume_info->prepath); | |
2630 | kfree(volume_info); | |
2631 | *pvolume_info = NULL; | |
2632 | return; | |
2633 | } | |
2634 | ||
2d6d589d | 2635 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2636 | /* build_path_to_root returns full path to root when |
2637 | * we do not have an exiting connection (tcon) */ | |
2638 | static char * | |
2639 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2640 | const struct cifs_sb_info *cifs_sb) | |
2641 | { | |
2642 | char *full_path; | |
2643 | ||
2644 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2645 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2646 | if (full_path == NULL) | |
2647 | return ERR_PTR(-ENOMEM); | |
2648 | ||
2649 | strncpy(full_path, volume_info->UNC, unc_len); | |
2650 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2651 | int i; | |
2652 | for (i = 0; i < unc_len; i++) { | |
2653 | if (full_path[i] == '\\') | |
2654 | full_path[i] = '/'; | |
2655 | } | |
2656 | } | |
2657 | ||
2658 | if (cifs_sb->prepathlen) | |
2659 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2660 | cifs_sb->prepathlen); | |
2661 | ||
2662 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2663 | return full_path; | |
2664 | } | |
2d6d589d | 2665 | #endif |
1bfe73c2 | 2666 | |
1da177e4 LT |
2667 | int |
2668 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
1bfe73c2 | 2669 | char *mount_data_global, const char *devname) |
1da177e4 | 2670 | { |
a2934c7b | 2671 | int rc; |
1da177e4 | 2672 | int xid; |
7586b765 | 2673 | struct smb_vol *volume_info; |
a2934c7b JL |
2674 | struct cifsSesInfo *pSesInfo; |
2675 | struct cifsTconInfo *tcon; | |
2676 | struct TCP_Server_Info *srvTcp; | |
e4cce94c | 2677 | char *full_path; |
2d6d589d | 2678 | char *mount_data = mount_data_global; |
9d002df4 | 2679 | struct tcon_link *tlink; |
2d6d589d | 2680 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2681 | struct dfs_info3_param *referrals = NULL; |
2682 | unsigned int num_referrals = 0; | |
5c2503a8 | 2683 | int referral_walks_count = 0; |
1bfe73c2 | 2684 | try_mount_again: |
2d6d589d | 2685 | #endif |
a2934c7b JL |
2686 | rc = 0; |
2687 | tcon = NULL; | |
2688 | pSesInfo = NULL; | |
2689 | srvTcp = NULL; | |
1bfe73c2 | 2690 | full_path = NULL; |
9d002df4 | 2691 | tlink = NULL; |
1da177e4 LT |
2692 | |
2693 | xid = GetXid(); | |
2694 | ||
7586b765 JL |
2695 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2696 | if (!volume_info) { | |
2697 | rc = -ENOMEM; | |
2698 | goto out; | |
2699 | } | |
50c2f753 | 2700 | |
7586b765 | 2701 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) { |
70fe7dc0 JL |
2702 | rc = -EINVAL; |
2703 | goto out; | |
1da177e4 LT |
2704 | } |
2705 | ||
7586b765 | 2706 | if (volume_info->nullauth) { |
b6b38f70 | 2707 | cFYI(1, "null user"); |
7586b765 JL |
2708 | volume_info->username = ""; |
2709 | } else if (volume_info->username) { | |
1da177e4 | 2710 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2711 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2712 | } else { |
bf820679 | 2713 | cifserror("No username specified"); |
50c2f753 SF |
2714 | /* In userspace mount helper we can get user name from alternate |
2715 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2716 | rc = -EINVAL; |
2717 | goto out; | |
1da177e4 LT |
2718 | } |
2719 | ||
1da177e4 | 2720 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2721 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2722 | /* load_nls_default cannot return null */ |
2723 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2724 | } else { |
a5fc4ce0 JL |
2725 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2726 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2727 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2728 | volume_info->iocharset); | |
70fe7dc0 JL |
2729 | rc = -ELIBACC; |
2730 | goto out; | |
1da177e4 LT |
2731 | } |
2732 | } | |
a5fc4ce0 | 2733 | cifs_sb->local_nls = volume_info->local_nls; |
1da177e4 | 2734 | |
63c038c2 | 2735 | /* get a reference to a tcp session */ |
7586b765 | 2736 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
2737 | if (IS_ERR(srvTcp)) { |
2738 | rc = PTR_ERR(srvTcp); | |
2739 | goto out; | |
1da177e4 LT |
2740 | } |
2741 | ||
36988c76 JL |
2742 | /* get a reference to a SMB session */ |
2743 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
2744 | if (IS_ERR(pSesInfo)) { | |
2745 | rc = PTR_ERR(pSesInfo); | |
2746 | pSesInfo = NULL; | |
2747 | goto mount_fail_check; | |
1da177e4 | 2748 | } |
50c2f753 | 2749 | |
d00c28de JL |
2750 | setup_cifs_sb(volume_info, cifs_sb); |
2751 | if (pSesInfo->capabilities & CAP_LARGE_FILES) | |
2752 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2753 | else | |
2754 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 2755 | |
8af18971 | 2756 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
2757 | sb->s_time_gran = 100; |
2758 | ||
d00c28de JL |
2759 | /* search for existing tcon to this server share */ |
2760 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
2761 | if (IS_ERR(tcon)) { | |
2762 | rc = PTR_ERR(tcon); | |
2763 | tcon = NULL; | |
1bfe73c2 | 2764 | goto remote_path_check; |
d00c28de | 2765 | } |
1bfe73c2 | 2766 | |
d82c2df5 SF |
2767 | /* do not care if following two calls succeed - informational */ |
2768 | if (!tcon->ipc) { | |
2769 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
2770 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
2771 | } | |
03a143c9 | 2772 | |
d82c2df5 SF |
2773 | /* tell server which Unix caps we support */ |
2774 | if (tcon->ses->capabilities & CAP_UNIX) | |
2775 | /* reset of caps checks mount to see if unix extensions | |
2776 | disabled for just this mount */ | |
7586b765 | 2777 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
d82c2df5 SF |
2778 | else |
2779 | tcon->unix_ext = 0; /* server does not support them */ | |
c18c842b | 2780 | |
d82c2df5 SF |
2781 | /* convert forward to back slashes in prepath here if needed */ |
2782 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2783 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 2784 | |
d82c2df5 SF |
2785 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
2786 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 2787 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 2788 | } |
d82c2df5 SF |
2789 | if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X)) |
2790 | cifs_sb->wsize = min(cifs_sb->wsize, | |
2791 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
2792 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) | |
2793 | cifs_sb->rsize = min(cifs_sb->rsize, | |
2794 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 2795 | |
1bfe73c2 IM |
2796 | remote_path_check: |
2797 | /* check if a whole path (including prepath) is not remote */ | |
2798 | if (!rc && cifs_sb->prepathlen && tcon) { | |
e4cce94c | 2799 | /* build_path_to_root works only when we have a valid tcon */ |
7d161b7f | 2800 | full_path = cifs_build_path_to_root(cifs_sb, tcon); |
e4cce94c IM |
2801 | if (full_path == NULL) { |
2802 | rc = -ENOMEM; | |
2803 | goto mount_fail_check; | |
2804 | } | |
2805 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 2806 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
2807 | kfree(full_path); |
2808 | goto mount_fail_check; | |
2809 | } | |
2810 | kfree(full_path); | |
2811 | } | |
2812 | ||
1bfe73c2 IM |
2813 | /* get referral if needed */ |
2814 | if (rc == -EREMOTE) { | |
d036f50f | 2815 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
2816 | if (referral_walks_count > MAX_NESTED_LINKS) { |
2817 | /* | |
2818 | * BB: when we implement proper loop detection, | |
2819 | * we will remove this check. But now we need it | |
2820 | * to prevent an indefinite loop if 'DFS tree' is | |
2821 | * misconfigured (i.e. has loops). | |
2822 | */ | |
2823 | rc = -ELOOP; | |
2824 | goto mount_fail_check; | |
2825 | } | |
1bfe73c2 IM |
2826 | /* convert forward to back slashes in prepath here if needed */ |
2827 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2828 | convert_delimiter(cifs_sb->prepath, | |
2829 | CIFS_DIR_SEP(cifs_sb)); | |
2830 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2831 | if (IS_ERR(full_path)) { | |
2832 | rc = PTR_ERR(full_path); | |
2833 | goto mount_fail_check; | |
2834 | } | |
2835 | ||
b6b38f70 | 2836 | cFYI(1, "Getting referral for: %s", full_path); |
1bfe73c2 IM |
2837 | rc = get_dfs_path(xid, pSesInfo , full_path + 1, |
2838 | cifs_sb->local_nls, &num_referrals, &referrals, | |
2839 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2840 | if (!rc && num_referrals > 0) { | |
2841 | char *fake_devname = NULL; | |
2842 | ||
2843 | if (mount_data != mount_data_global) | |
2844 | kfree(mount_data); | |
7b91e266 | 2845 | |
1bfe73c2 IM |
2846 | mount_data = cifs_compose_mount_options( |
2847 | cifs_sb->mountdata, full_path + 1, | |
2848 | referrals, &fake_devname); | |
7b91e266 | 2849 | |
1bfe73c2 | 2850 | free_dfs_info_array(referrals, num_referrals); |
7b91e266 JL |
2851 | kfree(fake_devname); |
2852 | kfree(full_path); | |
2853 | ||
2854 | if (IS_ERR(mount_data)) { | |
2855 | rc = PTR_ERR(mount_data); | |
2856 | mount_data = NULL; | |
2857 | goto mount_fail_check; | |
2858 | } | |
1bfe73c2 IM |
2859 | |
2860 | if (tcon) | |
2861 | cifs_put_tcon(tcon); | |
2862 | else if (pSesInfo) | |
2863 | cifs_put_smb_ses(pSesInfo); | |
2864 | ||
2865 | cleanup_volume_info(&volume_info); | |
5c2503a8 | 2866 | referral_walks_count++; |
a2934c7b | 2867 | FreeXid(xid); |
1bfe73c2 IM |
2868 | goto try_mount_again; |
2869 | } | |
d036f50f SF |
2870 | #else /* No DFS support, return error on mount */ |
2871 | rc = -EOPNOTSUPP; | |
2872 | #endif | |
1bfe73c2 IM |
2873 | } |
2874 | ||
9d002df4 JL |
2875 | if (rc) |
2876 | goto mount_fail_check; | |
2877 | ||
2878 | /* now, hang the tcon off of the superblock */ | |
2879 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
2880 | if (tlink == NULL) { | |
2881 | rc = -ENOMEM; | |
2882 | goto mount_fail_check; | |
2883 | } | |
2884 | ||
b647c35f | 2885 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
2886 | tlink->tl_tcon = tcon; |
2887 | tlink->tl_time = jiffies; | |
2888 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
2889 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
2890 | ||
b647c35f | 2891 | cifs_sb->master_tlink = tlink; |
9d002df4 | 2892 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 2893 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 2894 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 2895 | |
2de970ff JL |
2896 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
2897 | TLINK_IDLE_EXPIRE); | |
2898 | ||
1bfe73c2 IM |
2899 | mount_fail_check: |
2900 | /* on error free sesinfo and tcon struct if needed */ | |
2901 | if (rc) { | |
2902 | if (mount_data != mount_data_global) | |
2903 | kfree(mount_data); | |
2904 | /* If find_unc succeeded then rc == 0 so we can not end */ | |
2905 | /* up accidently freeing someone elses tcon struct */ | |
2906 | if (tcon) | |
2907 | cifs_put_tcon(tcon); | |
2908 | else if (pSesInfo) | |
2909 | cifs_put_smb_ses(pSesInfo); | |
2910 | else | |
2911 | cifs_put_tcp_session(srvTcp); | |
2912 | goto out; | |
2913 | } | |
2914 | ||
7586b765 | 2915 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
2916 | (in which case it is not needed anymore) but when new sesion is created |
2917 | the password ptr is put in the new session structure (in which case the | |
2918 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
2919 | out: |
2920 | /* zero out password before freeing */ | |
1bfe73c2 | 2921 | cleanup_volume_info(&volume_info); |
1da177e4 LT |
2922 | FreeXid(xid); |
2923 | return rc; | |
2924 | } | |
2925 | ||
1da177e4 LT |
2926 | int |
2927 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
2928 | const char *tree, struct cifsTconInfo *tcon, | |
2929 | const struct nls_table *nls_codepage) | |
2930 | { | |
2931 | struct smb_hdr *smb_buffer; | |
2932 | struct smb_hdr *smb_buffer_response; | |
2933 | TCONX_REQ *pSMB; | |
2934 | TCONX_RSP *pSMBr; | |
2935 | unsigned char *bcc_ptr; | |
2936 | int rc = 0; | |
cc20c031 | 2937 | int length, bytes_left; |
1da177e4 LT |
2938 | __u16 count; |
2939 | ||
2940 | if (ses == NULL) | |
2941 | return -EIO; | |
2942 | ||
2943 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 2944 | if (smb_buffer == NULL) |
1da177e4 | 2945 | return -ENOMEM; |
ca43e3be | 2946 | |
1da177e4 LT |
2947 | smb_buffer_response = smb_buffer; |
2948 | ||
2949 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
2950 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
2951 | |
2952 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
2953 | smb_buffer->Uid = ses->Suid; |
2954 | pSMB = (TCONX_REQ *) smb_buffer; | |
2955 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
2956 | ||
2957 | pSMB->AndXCommand = 0xFF; | |
2958 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 2959 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 2960 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 2961 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 2962 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 2963 | bcc_ptr++; /* skip password */ |
7c7b25bc | 2964 | /* already aligned so no need to do it below */ |
eeac8047 | 2965 | } else { |
7c7b25bc | 2966 | pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
eeac8047 SF |
2967 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
2968 | specified as required (when that support is added to | |
2969 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 2970 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
2971 | by Samba (not sure whether other servers allow |
2972 | NTLMv2 password here) */ | |
7c7b25bc | 2973 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 2974 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 2975 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 2976 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
4e53a3fb JL |
2977 | ses->server->secMode & |
2978 | SECMODE_PW_ENCRYPT ? true : false, | |
2979 | bcc_ptr); | |
7c7b25bc SF |
2980 | else |
2981 | #endif /* CIFS_WEAK_PW_HASH */ | |
d3ba50b1 | 2982 | SMBNTencrypt(tcon->password, ses->server->cryptkey, bcc_ptr); |
eeac8047 | 2983 | |
7c7b25bc | 2984 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
fb8c4b14 | 2985 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
2986 | /* must align unicode strings */ |
2987 | *bcc_ptr = 0; /* null byte password */ | |
2988 | bcc_ptr++; | |
2989 | } | |
eeac8047 | 2990 | } |
1da177e4 | 2991 | |
50c2f753 | 2992 | if (ses->server->secMode & |
a878fb22 | 2993 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
2994 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
2995 | ||
2996 | if (ses->capabilities & CAP_STATUS32) { | |
2997 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
2998 | } | |
2999 | if (ses->capabilities & CAP_DFS) { | |
3000 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3001 | } | |
3002 | if (ses->capabilities & CAP_UNICODE) { | |
3003 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3004 | length = | |
50c2f753 SF |
3005 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3006 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3007 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3008 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3009 | bcc_ptr += 2; /* skip trailing null */ |
3010 | } else { /* ASCII */ | |
1da177e4 LT |
3011 | strcpy(bcc_ptr, tree); |
3012 | bcc_ptr += strlen(tree) + 1; | |
3013 | } | |
3014 | strcpy(bcc_ptr, "?????"); | |
3015 | bcc_ptr += strlen("?????"); | |
3016 | bcc_ptr += 1; | |
3017 | count = bcc_ptr - &pSMB->Password[0]; | |
3018 | pSMB->hdr.smb_buf_length += count; | |
3019 | pSMB->ByteCount = cpu_to_le16(count); | |
3020 | ||
133672ef SF |
3021 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
3022 | CIFS_STD_OP); | |
1da177e4 | 3023 | |
1da177e4 LT |
3024 | /* above now done in SendReceive */ |
3025 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3026 | bool is_unicode; |
3027 | ||
1da177e4 | 3028 | tcon->tidStatus = CifsGood; |
3b795210 | 3029 | tcon->need_reconnect = false; |
1da177e4 LT |
3030 | tcon->tid = smb_buffer_response->Tid; |
3031 | bcc_ptr = pByteArea(smb_buffer_response); | |
cc20c031 JL |
3032 | bytes_left = BCC(smb_buffer_response); |
3033 | length = strnlen(bcc_ptr, bytes_left - 2); | |
0e0d2cf3 SF |
3034 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3035 | is_unicode = true; | |
3036 | else | |
3037 | is_unicode = false; | |
3038 | ||
cc20c031 | 3039 | |
50c2f753 | 3040 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3041 | if (length == 3) { |
3042 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3043 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3044 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3045 | tcon->ipc = 1; |
3046 | } | |
3047 | } else if (length == 2) { | |
3048 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3049 | /* the most common case */ | |
b6b38f70 | 3050 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3051 | } |
3052 | } | |
50c2f753 | 3053 | bcc_ptr += length + 1; |
cc20c031 | 3054 | bytes_left -= (length + 1); |
1da177e4 | 3055 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3056 | |
3057 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3058 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3059 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3060 | bytes_left, is_unicode, |
cc20c031 JL |
3061 | nls_codepage); |
3062 | ||
b6b38f70 | 3063 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3064 | |
fb8c4b14 | 3065 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3066 | (smb_buffer_response->WordCount == 7)) |
3067 | /* field is in same location */ | |
3979877e SF |
3068 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3069 | else | |
3070 | tcon->Flags = 0; | |
b6b38f70 | 3071 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3072 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3073 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3074 | ses->ipc_tid = smb_buffer_response->Tid; |
3075 | } | |
3076 | ||
a8a11d39 | 3077 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3078 | return rc; |
3079 | } | |
3080 | ||
3081 | int | |
3082 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
3083 | { | |
b647c35f JL |
3084 | struct rb_root *root = &cifs_sb->tlink_tree; |
3085 | struct rb_node *node; | |
3086 | struct tcon_link *tlink; | |
50c2f753 | 3087 | char *tmp; |
9d002df4 | 3088 | |
2de970ff JL |
3089 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3090 | ||
b647c35f JL |
3091 | spin_lock(&cifs_sb->tlink_tree_lock); |
3092 | while ((node = rb_first(root))) { | |
3093 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3094 | cifs_get_tlink(tlink); | |
3095 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3096 | rb_erase(node, root); | |
1da177e4 | 3097 | |
b647c35f JL |
3098 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3099 | cifs_put_tlink(tlink); | |
3100 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3101 | } | |
3102 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3103 | |
2fe87f02 SF |
3104 | tmp = cifs_sb->prepath; |
3105 | cifs_sb->prepathlen = 0; | |
3106 | cifs_sb->prepath = NULL; | |
3107 | kfree(tmp); | |
1da177e4 | 3108 | |
9d002df4 | 3109 | return 0; |
50c2f753 | 3110 | } |
1da177e4 | 3111 | |
198b5682 | 3112 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
3113 | { |
3114 | int rc = 0; | |
198b5682 | 3115 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3116 | |
198b5682 JL |
3117 | /* only send once per connect */ |
3118 | if (server->maxBuf != 0) | |
3119 | return 0; | |
3120 | ||
3121 | rc = CIFSSMBNegotiate(xid, ses); | |
3122 | if (rc == -EAGAIN) { | |
3123 | /* retry only once on 1st time connection */ | |
3124 | rc = CIFSSMBNegotiate(xid, ses); | |
3125 | if (rc == -EAGAIN) | |
3126 | rc = -EHOSTDOWN; | |
1da177e4 | 3127 | } |
198b5682 JL |
3128 | if (rc == 0) { |
3129 | spin_lock(&GlobalMid_Lock); | |
3130 | if (server->tcpStatus != CifsExiting) | |
3131 | server->tcpStatus = CifsGood; | |
3132 | else | |
3133 | rc = -EHOSTDOWN; | |
3134 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3135 | |
198b5682 JL |
3136 | } |
3137 | ||
3138 | return rc; | |
3139 | } | |
3140 | ||
3141 | ||
3142 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
3143 | struct nls_table *nls_info) | |
3144 | { | |
3145 | int rc = 0; | |
3146 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3147 | |
198b5682 JL |
3148 | ses->flags = 0; |
3149 | ses->capabilities = server->capabilities; | |
26b994fa | 3150 | if (linuxExtEnabled == 0) |
198b5682 | 3151 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3152 | |
b6b38f70 JP |
3153 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
3154 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 3155 | |
198b5682 | 3156 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3157 | if (rc) { |
b6b38f70 | 3158 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3159 | } else { |
5d0d2882 SP |
3160 | mutex_lock(&ses->server->srv_mutex); |
3161 | if (!server->session_estab) { | |
21e73393 | 3162 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3163 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3164 | server->sequence_number = 0x2; |
3165 | server->session_estab = true; | |
3166 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3167 | } |
3168 | mutex_unlock(&server->srv_mutex); | |
3169 | ||
b6b38f70 | 3170 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3171 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3172 | ses->status = CifsGood; |
3173 | ses->need_reconnect = false; | |
20418acd | 3174 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3175 | } |
26b994fa | 3176 | |
21e73393 SP |
3177 | kfree(ses->auth_key.response); |
3178 | ses->auth_key.response = NULL; | |
3179 | ses->auth_key.len = 0; | |
d3686d54 SP |
3180 | kfree(ses->ntlmssp); |
3181 | ses->ntlmssp = NULL; | |
21e73393 | 3182 | |
1da177e4 LT |
3183 | return rc; |
3184 | } | |
3185 | ||
d2445556 | 3186 | static struct cifsTconInfo * |
9d002df4 JL |
3187 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3188 | { | |
3189 | struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb); | |
3190 | struct cifsSesInfo *ses; | |
3191 | struct cifsTconInfo *tcon = NULL; | |
3192 | struct smb_vol *vol_info; | |
3193 | char username[MAX_USERNAME_SIZE + 1]; | |
3194 | ||
3195 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3196 | if (vol_info == NULL) { | |
3197 | tcon = ERR_PTR(-ENOMEM); | |
3198 | goto out; | |
3199 | } | |
3200 | ||
3201 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3202 | vol_info->username = username; | |
3203 | vol_info->local_nls = cifs_sb->local_nls; | |
3204 | vol_info->linux_uid = fsuid; | |
3205 | vol_info->cred_uid = fsuid; | |
3206 | vol_info->UNC = master_tcon->treeName; | |
3207 | vol_info->retry = master_tcon->retry; | |
3208 | vol_info->nocase = master_tcon->nocase; | |
3209 | vol_info->local_lease = master_tcon->local_lease; | |
3210 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3211 | ||
3212 | /* FIXME: allow for other secFlg settings */ | |
3213 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3214 | ||
3215 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3216 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3217 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3218 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3219 | |
3220 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3221 | if (IS_ERR(ses)) { | |
3222 | tcon = (struct cifsTconInfo *)ses; | |
3223 | cifs_put_tcp_session(master_tcon->ses->server); | |
3224 | goto out; | |
3225 | } | |
3226 | ||
3227 | tcon = cifs_get_tcon(ses, vol_info); | |
3228 | if (IS_ERR(tcon)) { | |
3229 | cifs_put_smb_ses(ses); | |
3230 | goto out; | |
3231 | } | |
3232 | ||
3233 | if (ses->capabilities & CAP_UNIX) | |
3234 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3235 | out: | |
3236 | kfree(vol_info); | |
3237 | ||
3238 | return tcon; | |
3239 | } | |
3240 | ||
413e661c | 3241 | static inline struct tcon_link * |
9d002df4 JL |
3242 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3243 | { | |
413e661c | 3244 | return cifs_sb->master_tlink; |
9d002df4 JL |
3245 | } |
3246 | ||
3247 | struct cifsTconInfo * | |
3248 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) | |
3249 | { | |
3250 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3251 | } | |
3252 | ||
3253 | static int | |
3254 | cifs_sb_tcon_pending_wait(void *unused) | |
3255 | { | |
3256 | schedule(); | |
3257 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3258 | } | |
3259 | ||
b647c35f JL |
3260 | /* find and return a tlink with given uid */ |
3261 | static struct tcon_link * | |
3262 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3263 | { | |
3264 | struct rb_node *node = root->rb_node; | |
3265 | struct tcon_link *tlink; | |
3266 | ||
3267 | while (node) { | |
3268 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3269 | ||
3270 | if (tlink->tl_uid > uid) | |
3271 | node = node->rb_left; | |
3272 | else if (tlink->tl_uid < uid) | |
3273 | node = node->rb_right; | |
3274 | else | |
3275 | return tlink; | |
3276 | } | |
3277 | return NULL; | |
3278 | } | |
3279 | ||
3280 | /* insert a tcon_link into the tree */ | |
3281 | static void | |
3282 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3283 | { | |
3284 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3285 | struct tcon_link *tlink; | |
3286 | ||
3287 | while (*new) { | |
3288 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3289 | parent = *new; | |
3290 | ||
3291 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3292 | new = &((*new)->rb_left); | |
3293 | else | |
3294 | new = &((*new)->rb_right); | |
3295 | } | |
3296 | ||
3297 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3298 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3299 | } | |
3300 | ||
9d002df4 JL |
3301 | /* |
3302 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3303 | * current task. | |
3304 | * | |
3305 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3306 | * the master tcon for the mount. | |
3307 | * | |
6ef933a3 | 3308 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3309 | * exists, then check to see if it's pending construction. If it is then wait |
3310 | * for construction to complete. Once it's no longer pending, check to see if | |
3311 | * it failed and either return an error or retry construction, depending on | |
3312 | * the timeout. | |
3313 | * | |
3314 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3315 | * try to construct a new one. | |
3316 | */ | |
3317 | struct tcon_link * | |
3318 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3319 | { | |
3320 | int ret; | |
b647c35f | 3321 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3322 | struct tcon_link *tlink, *newtlink; |
3323 | ||
3324 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3325 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3326 | ||
3327 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3328 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3329 | if (tlink) |
3330 | cifs_get_tlink(tlink); | |
3331 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3332 | ||
3333 | if (tlink == NULL) { | |
3334 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3335 | if (newtlink == NULL) | |
3336 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3337 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3338 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3339 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3340 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3341 | cifs_get_tlink(newtlink); | |
3342 | ||
9d002df4 JL |
3343 | spin_lock(&cifs_sb->tlink_tree_lock); |
3344 | /* was one inserted after previous search? */ | |
b647c35f | 3345 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3346 | if (tlink) { |
3347 | cifs_get_tlink(tlink); | |
3348 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3349 | kfree(newtlink); |
3350 | goto wait_for_construction; | |
3351 | } | |
9d002df4 | 3352 | tlink = newtlink; |
b647c35f JL |
3353 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3354 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3355 | } else { |
3356 | wait_for_construction: | |
3357 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3358 | cifs_sb_tcon_pending_wait, | |
3359 | TASK_INTERRUPTIBLE); | |
3360 | if (ret) { | |
3361 | cifs_put_tlink(tlink); | |
3362 | return ERR_PTR(ret); | |
3363 | } | |
3364 | ||
3365 | /* if it's good, return it */ | |
3366 | if (!IS_ERR(tlink->tl_tcon)) | |
3367 | return tlink; | |
3368 | ||
3369 | /* return error if we tried this already recently */ | |
3370 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3371 | cifs_put_tlink(tlink); | |
3372 | return ERR_PTR(-EACCES); | |
3373 | } | |
3374 | ||
3375 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3376 | goto wait_for_construction; | |
3377 | } | |
3378 | ||
3379 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3380 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3381 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3382 | ||
3383 | if (IS_ERR(tlink->tl_tcon)) { | |
3384 | cifs_put_tlink(tlink); | |
3385 | return ERR_PTR(-EACCES); | |
3386 | } | |
3387 | ||
3388 | return tlink; | |
3389 | } | |
2de970ff JL |
3390 | |
3391 | /* | |
3392 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3393 | * out tcons. | |
3394 | */ | |
3395 | static void | |
3396 | cifs_prune_tlinks(struct work_struct *work) | |
3397 | { | |
3398 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3399 | prune_tlinks.work); | |
b647c35f JL |
3400 | struct rb_root *root = &cifs_sb->tlink_tree; |
3401 | struct rb_node *node = rb_first(root); | |
3402 | struct rb_node *tmp; | |
3403 | struct tcon_link *tlink; | |
2de970ff | 3404 | |
b647c35f JL |
3405 | /* |
3406 | * Because we drop the spinlock in the loop in order to put the tlink | |
3407 | * it's not guarded against removal of links from the tree. The only | |
3408 | * places that remove entries from the tree are this function and | |
3409 | * umounts. Because this function is non-reentrant and is canceled | |
3410 | * before umount can proceed, this is safe. | |
3411 | */ | |
3412 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3413 | node = rb_first(root); | |
3414 | while (node != NULL) { | |
3415 | tmp = node; | |
3416 | node = rb_next(tmp); | |
3417 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3418 | ||
3419 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3420 | atomic_read(&tlink->tl_count) != 0 || | |
3421 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3422 | continue; | |
2de970ff | 3423 | |
b647c35f JL |
3424 | cifs_get_tlink(tlink); |
3425 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3426 | rb_erase(tmp, root); | |
3427 | ||
3428 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3429 | cifs_put_tlink(tlink); | |
3430 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3431 | } | |
3432 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3433 | |
3434 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3435 | TLINK_IDLE_EXPIRE); | |
3436 | } |