Commit | Line | Data |
---|---|---|
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 LT |
66 | char *iocharset; /* local code page for mapping to and from Unicode */ |
67 | char source_rfc1001_name[16]; /* netbios name of client */ | |
a10faeb2 | 68 | char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */ |
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 | */ | |
819 | memset(vol->source_rfc1001_name, 0x20, 15); | |
820 | for (i = 0; i < strnlen(nodename, 15); i++) | |
821 | vol->source_rfc1001_name[i] = toupper(nodename[i]); | |
822 | ||
1da177e4 | 823 | vol->source_rfc1001_name[15] = 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 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
988 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { | |
989 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
990 | CIFSSEC_MUST_SIGN; | |
991 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
992 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
993 | #endif | |
bf820679 | 994 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 995 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 996 | CIFSSEC_MUST_SIGN; |
bf820679 | 997 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 998 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 999 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1000 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1001 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1002 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1003 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1004 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1005 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1006 | /* BB is there a better way to do this? */ |
750d1151 | 1007 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1008 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1009 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1010 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1011 | #endif |
bf820679 | 1012 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1013 | vol->nullauth = 1; |
50c2f753 | 1014 | } else { |
b6b38f70 | 1015 | cERROR(1, "bad security option: %s", value); |
50c2f753 SF |
1016 | return 1; |
1017 | } | |
1da177e4 LT |
1018 | } else if ((strnicmp(data, "unc", 3) == 0) |
1019 | || (strnicmp(data, "target", 6) == 0) | |
1020 | || (strnicmp(data, "path", 4) == 0)) { | |
1021 | if (!value || !*value) { | |
50c2f753 SF |
1022 | printk(KERN_WARNING "CIFS: invalid path to " |
1023 | "network resource\n"); | |
1da177e4 LT |
1024 | return 1; /* needs_arg; */ |
1025 | } | |
1026 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1027 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1028 | if (vol->UNC == NULL) |
1da177e4 | 1029 | return 1; |
50c2f753 | 1030 | strcpy(vol->UNC, value); |
1da177e4 LT |
1031 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1032 | vol->UNC[0] = '\\'; | |
1033 | vol->UNC[1] = '\\'; | |
50c2f753 | 1034 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1035 | printk(KERN_WARNING |
50c2f753 SF |
1036 | "CIFS: UNC Path does not begin " |
1037 | "with // or \\\\ \n"); | |
1da177e4 LT |
1038 | return 1; |
1039 | } | |
1040 | } else { | |
1041 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1042 | return 1; | |
1043 | } | |
1044 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1045 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1046 | if (!value || !*value) { | |
1047 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
1048 | return 1; /* needs_arg; */ | |
1049 | } | |
1050 | /* BB are there cases in which a comma can be valid in | |
1051 | a domain name and need special handling? */ | |
3979877e | 1052 | if (strnlen(value, 256) < 256) { |
1da177e4 | 1053 | vol->domainname = value; |
b6b38f70 | 1054 | cFYI(1, "Domain name set"); |
1da177e4 | 1055 | } else { |
50c2f753 SF |
1056 | printk(KERN_WARNING "CIFS: domain name too " |
1057 | "long\n"); | |
1da177e4 LT |
1058 | return 1; |
1059 | } | |
3eb9a889 BG |
1060 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1061 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1062 | ||
1063 | if (!value || !*value) { | |
1064 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1065 | " not specified.\n"); | |
1066 | return 1; /* needs_arg; */ | |
1067 | } | |
1068 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1069 | value, strlen(value)); | |
b235f371 | 1070 | if (i == 0) { |
3eb9a889 BG |
1071 | printk(KERN_WARNING "CIFS: Could not parse" |
1072 | " srcaddr: %s\n", | |
1073 | value); | |
1074 | return 1; | |
1075 | } | |
50c2f753 SF |
1076 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1077 | if (!value || !*value) { | |
1078 | printk(KERN_WARNING | |
1079 | "CIFS: invalid path prefix\n"); | |
1080 | return 1; /* needs_argument */ | |
1081 | } | |
1082 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1083 | if (value[0] != '/') |
2fe87f02 | 1084 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1085 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1086 | if (vol->prepath == NULL) | |
1087 | return 1; | |
4523cc30 | 1088 | if (value[0] != '/') { |
2fe87f02 | 1089 | vol->prepath[0] = '/'; |
50c2f753 | 1090 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1091 | } else |
50c2f753 | 1092 | strcpy(vol->prepath, value); |
b6b38f70 | 1093 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1094 | } else { |
1095 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1096 | return 1; | |
1097 | } | |
1da177e4 LT |
1098 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1099 | if (!value || !*value) { | |
63135e08 SF |
1100 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1101 | "specified\n"); | |
1da177e4 LT |
1102 | return 1; /* needs_arg; */ |
1103 | } | |
1104 | if (strnlen(value, 65) < 65) { | |
50c2f753 | 1105 | if (strnicmp(value, "default", 7)) |
1da177e4 | 1106 | vol->iocharset = value; |
50c2f753 SF |
1107 | /* if iocharset not set then load_nls_default |
1108 | is used by caller */ | |
b6b38f70 | 1109 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1110 | } else { |
63135e08 SF |
1111 | printk(KERN_WARNING "CIFS: iocharset name " |
1112 | "too long.\n"); | |
1da177e4 LT |
1113 | return 1; |
1114 | } | |
9b9d6b24 JL |
1115 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1116 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1117 | uid_specified = true; | |
1118 | } else if (!strnicmp(data, "forceuid", 8)) { | |
1119 | override_uid = 1; | |
1120 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1121 | override_uid = 0; | |
1122 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1123 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1124 | gid_specified = true; | |
1125 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1126 | override_gid = 1; | |
1127 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1128 | override_gid = 0; | |
1da177e4 LT |
1129 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1130 | if (value && *value) { | |
1131 | vol->file_mode = | |
1132 | simple_strtoul(value, &value, 0); | |
1133 | } | |
1134 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1135 | if (value && *value) { | |
1136 | vol->dir_mode = | |
1137 | simple_strtoul(value, &value, 0); | |
1138 | } | |
1139 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1140 | if (value && *value) { | |
1141 | vol->dir_mode = | |
1142 | simple_strtoul(value, &value, 0); | |
1143 | } | |
1144 | } else if (strnicmp(data, "port", 4) == 0) { | |
1145 | if (value && *value) { | |
1146 | vol->port = | |
1147 | simple_strtoul(value, &value, 0); | |
1148 | } | |
1149 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1150 | if (value && *value) { | |
1151 | vol->rsize = | |
1152 | simple_strtoul(value, &value, 0); | |
1153 | } | |
1154 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1155 | if (value && *value) { | |
1156 | vol->wsize = | |
1157 | simple_strtoul(value, &value, 0); | |
1158 | } | |
1159 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1160 | if (!value || !*value) { |
b6b38f70 | 1161 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1162 | continue; |
1163 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1164 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1165 | } |
1166 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1167 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1168 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1169 | } else { |
50c2f753 SF |
1170 | memset(vol->source_rfc1001_name, 0x20, 15); |
1171 | for (i = 0; i < 15; i++) { | |
1172 | /* BB are there cases in which a comma can be | |
1da177e4 LT |
1173 | valid in this workstation netbios name (and need |
1174 | special handling)? */ | |
1175 | ||
1176 | /* We do not uppercase netbiosname for user */ | |
50c2f753 | 1177 | if (value[i] == 0) |
1da177e4 | 1178 | break; |
50c2f753 SF |
1179 | else |
1180 | vol->source_rfc1001_name[i] = | |
1181 | value[i]; | |
1da177e4 LT |
1182 | } |
1183 | /* The string has 16th byte zero still from | |
1184 | set at top of the function */ | |
50c2f753 SF |
1185 | if ((i == 15) && (value[i] != 0)) |
1186 | printk(KERN_WARNING "CIFS: netbiosname" | |
1187 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1188 | } |
1189 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1190 | /* servernetbiosname specified override *SMBSERVER */ | |
1191 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1192 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1193 | } else { |
1194 | /* last byte, type, is 0x20 for servr type */ | |
50c2f753 | 1195 | memset(vol->target_rfc1001_name, 0x20, 16); |
a10faeb2 | 1196 | |
50c2f753 | 1197 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1198 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1199 | valid in this workstation netbios name |
1200 | (and need special handling)? */ | |
a10faeb2 | 1201 | |
50c2f753 SF |
1202 | /* user or mount helper must uppercase |
1203 | the netbiosname */ | |
1204 | if (value[i] == 0) | |
a10faeb2 SF |
1205 | break; |
1206 | else | |
50c2f753 SF |
1207 | vol->target_rfc1001_name[i] = |
1208 | value[i]; | |
a10faeb2 SF |
1209 | } |
1210 | /* The string has 16th byte zero still from | |
1211 | set at top of the function */ | |
50c2f753 SF |
1212 | if ((i == 15) && (value[i] != 0)) |
1213 | printk(KERN_WARNING "CIFS: server net" | |
1214 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1215 | } |
6d20e840 SJ |
1216 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1217 | if (value && *value) { | |
1218 | vol->actimeo = HZ * simple_strtoul(value, | |
1219 | &value, 0); | |
1220 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1221 | cERROR(1, "CIFS: attribute cache" | |
1222 | "timeout too large"); | |
1223 | return 1; | |
1224 | } | |
1225 | } | |
1da177e4 LT |
1226 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1227 | /* ignore */ | |
1228 | } else if (strnicmp(data, "version", 3) == 0) { | |
1229 | /* ignore */ | |
50c2f753 | 1230 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1231 | /* ignore */ |
71a394fa SF |
1232 | } else if (strnicmp(data, "rw", 2) == 0) { |
1233 | /* ignore */ | |
1234 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1235 | /* ignore */ | |
edf1ae40 SF |
1236 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1237 | vol->noblocksnd = 1; | |
1238 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1239 | vol->noautotune = 1; | |
1da177e4 LT |
1240 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1241 | (strnicmp(data, "nosuid", 6) == 0) || | |
1242 | (strnicmp(data, "exec", 4) == 0) || | |
1243 | (strnicmp(data, "noexec", 6) == 0) || | |
1244 | (strnicmp(data, "nodev", 5) == 0) || | |
1245 | (strnicmp(data, "noauto", 6) == 0) || | |
1246 | (strnicmp(data, "dev", 3) == 0)) { | |
1247 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1248 | uses these opts to set flags, and the flags are read |
1249 | by the kernel vfs layer before we get here (ie | |
1250 | before read super) so there is no point trying to | |
1251 | parse these options again and set anything and it | |
1252 | is ok to just ignore them */ | |
1da177e4 | 1253 | continue; |
1da177e4 LT |
1254 | } else if (strnicmp(data, "hard", 4) == 0) { |
1255 | vol->retry = 1; | |
1256 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1257 | vol->retry = 0; | |
1258 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1259 | vol->noperm = 0; | |
1260 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1261 | vol->noperm = 1; | |
6a0b4824 SF |
1262 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1263 | vol->remap = 1; | |
1264 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1265 | vol->remap = 0; | |
50c2f753 SF |
1266 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1267 | vol->sfu_emul = 1; | |
1268 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1269 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1270 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1271 | vol->nodfs = 1; | |
ac67055e JA |
1272 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1273 | vol->posix_paths = 1; | |
1274 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1275 | vol->posix_paths = 0; | |
c18c842b SF |
1276 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1277 | vol->no_linux_ext = 1; | |
1278 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1279 | vol->no_linux_ext = 1; | |
50c2f753 | 1280 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1281 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1282 | vol->nocase = 1; |
f636a348 JL |
1283 | } else if (strnicmp(data, "mand", 4) == 0) { |
1284 | /* ignore */ | |
1285 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1286 | /* ignore */ | |
1287 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1288 | /* ignore */ | |
c46fa8ac SF |
1289 | } else if (strnicmp(data, "brl", 3) == 0) { |
1290 | vol->nobrl = 0; | |
50c2f753 | 1291 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1292 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1293 | vol->nobrl = 1; |
d3485d37 SF |
1294 | /* turn off mandatory locking in mode |
1295 | if remote locking is turned off since the | |
1296 | local vfs will do advisory */ | |
50c2f753 SF |
1297 | if (vol->file_mode == |
1298 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1299 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1300 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1301 | /* will take the shorter form "forcemand" as well */ | |
1302 | /* This mount option will force use of mandatory | |
1303 | (DOS/Windows style) byte range locks, instead of | |
1304 | using posix advisory byte range locks, even if the | |
1305 | Unix extensions are available and posix locks would | |
1306 | be supported otherwise. If Unix extensions are not | |
1307 | negotiated this has no effect since mandatory locks | |
1308 | would be used (mandatory locks is all that those | |
1309 | those servers support) */ | |
1310 | vol->mand_lock = 1; | |
1da177e4 LT |
1311 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1312 | vol->setuids = 1; | |
1313 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1314 | vol->setuids = 0; | |
d0a9c078 JL |
1315 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1316 | vol->dynperm = true; | |
1317 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1318 | vol->dynperm = false; | |
1da177e4 LT |
1319 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1320 | vol->retry = 0; | |
1321 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1322 | vol->retry = 1; | |
1323 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1324 | vol->intr = 0; | |
1325 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1326 | vol->intr = 1; | |
be652445 SF |
1327 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1328 | vol->nostrictsync = 1; | |
1329 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1330 | vol->nostrictsync = 0; | |
50c2f753 | 1331 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1332 | vol->server_ino = 1; |
50c2f753 | 1333 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1334 | vol->server_ino = 0; |
50c2f753 | 1335 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1336 | vol->cifs_acl = 1; |
1337 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1338 | vol->cifs_acl = 0; | |
50c2f753 | 1339 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1340 | vol->no_psx_acl = 0; |
50c2f753 | 1341 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1342 | vol->no_psx_acl = 1; |
84210e91 SF |
1343 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1344 | } else if (strnicmp(data, "locallease", 6) == 0) { | |
1345 | vol->local_lease = 1; | |
1346 | #endif | |
50c2f753 | 1347 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1348 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1349 | } else if (strnicmp(data, "seal", 4) == 0) { |
1350 | /* we do not do the following in secFlags because seal | |
1351 | is a per tree connection (mount) not a per socket | |
1352 | or per-smb connection option in the protocol */ | |
1353 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1354 | vol->seal = 1; | |
50c2f753 | 1355 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1356 | vol->direct_io = 1; |
50c2f753 | 1357 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1358 | vol->direct_io = 1; |
1da177e4 | 1359 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1360 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1361 | "supported. Instead set " | |
1362 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1363 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d SJ |
1364 | #ifndef CONFIG_CIFS_FSCACHE |
1365 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" | |
1366 | "kernel config option set"); | |
1367 | return 1; | |
1368 | #endif | |
fa1df75d | 1369 | vol->fsc = true; |
736a3320 SM |
1370 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1371 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1372 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1373 | vol->multiuser = true; | |
1da177e4 | 1374 | } else |
50c2f753 SF |
1375 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1376 | data); | |
1da177e4 LT |
1377 | } |
1378 | if (vol->UNC == NULL) { | |
4523cc30 | 1379 | if (devname == NULL) { |
50c2f753 SF |
1380 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1381 | "target\n"); | |
1da177e4 LT |
1382 | return 1; |
1383 | } | |
1384 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1385 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1386 | if (vol->UNC == NULL) |
1da177e4 | 1387 | return 1; |
50c2f753 | 1388 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1389 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1390 | vol->UNC[0] = '\\'; | |
1391 | vol->UNC[1] = '\\'; | |
1392 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1393 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1394 | "begin with // or \\\\ \n"); | |
1da177e4 LT |
1395 | return 1; |
1396 | } | |
7c5e628f IM |
1397 | value = strpbrk(vol->UNC+2, "/\\"); |
1398 | if (value) | |
1399 | *value = '\\'; | |
1da177e4 LT |
1400 | } else { |
1401 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1402 | return 1; | |
1403 | } | |
1404 | } | |
0eb8a132 JL |
1405 | |
1406 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1407 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1408 | "authentication!"); | |
1409 | return 1; | |
1410 | } | |
1411 | ||
fb8c4b14 | 1412 | if (vol->UNCip == NULL) |
1da177e4 LT |
1413 | vol->UNCip = &vol->UNC[2]; |
1414 | ||
9b9d6b24 JL |
1415 | if (uid_specified) |
1416 | vol->override_uid = override_uid; | |
1417 | else if (override_uid == 1) | |
1418 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1419 | "specified with no uid= option.\n"); | |
1420 | ||
1421 | if (gid_specified) | |
1422 | vol->override_gid = override_gid; | |
1423 | else if (override_gid == 1) | |
1424 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1425 | "specified with no gid= option.\n"); | |
1426 | ||
1da177e4 LT |
1427 | return 0; |
1428 | } | |
1429 | ||
3eb9a889 BG |
1430 | /** Returns true if srcaddr isn't specified and rhs isn't |
1431 | * specified, or if srcaddr is specified and | |
1432 | * matches the IP address of the rhs argument. | |
1433 | */ | |
1434 | static bool | |
1435 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1436 | { | |
1437 | switch (srcaddr->sa_family) { | |
1438 | case AF_UNSPEC: | |
1439 | return (rhs->sa_family == AF_UNSPEC); | |
1440 | case AF_INET: { | |
1441 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1442 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1443 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1444 | } | |
1445 | case AF_INET6: { | |
1446 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1447 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1448 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1449 | } | |
1450 | default: | |
1451 | WARN_ON(1); | |
1452 | return false; /* don't expect to be here */ | |
1453 | } | |
1454 | } | |
1455 | ||
4b886136 PS |
1456 | /* |
1457 | * If no port is specified in addr structure, we try to match with 445 port | |
1458 | * and if it fails - with 139 ports. It should be called only if address | |
1459 | * families of server and addr are equal. | |
1460 | */ | |
1461 | static bool | |
1462 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1463 | { | |
1464 | unsigned short int port, *sport; | |
1465 | ||
1466 | switch (addr->sa_family) { | |
1467 | case AF_INET: | |
1468 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1469 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1470 | break; | |
1471 | case AF_INET6: | |
1472 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1473 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1474 | break; | |
1475 | default: | |
1476 | WARN_ON(1); | |
1477 | return false; | |
1478 | } | |
1479 | ||
1480 | if (!port) { | |
1481 | port = htons(CIFS_PORT); | |
1482 | if (port == *sport) | |
1483 | return true; | |
1484 | ||
1485 | port = htons(RFC1001_PORT); | |
1486 | } | |
1487 | ||
1488 | return port == *sport; | |
1489 | } | |
3eb9a889 | 1490 | |
4515148e | 1491 | static bool |
3eb9a889 BG |
1492 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1493 | struct sockaddr *srcaddr) | |
4515148e | 1494 | { |
4515148e | 1495 | switch (addr->sa_family) { |
a9f1b85e PS |
1496 | case AF_INET: { |
1497 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1498 | struct sockaddr_in *srv_addr4 = | |
1499 | (struct sockaddr_in *)&server->dstaddr; | |
1500 | ||
1501 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1502 | return false; |
4515148e | 1503 | break; |
a9f1b85e PS |
1504 | } |
1505 | case AF_INET6: { | |
1506 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1507 | struct sockaddr_in6 *srv_addr6 = | |
1508 | (struct sockaddr_in6 *)&server->dstaddr; | |
1509 | ||
4515148e | 1510 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1511 | &srv_addr6->sin6_addr)) |
4515148e | 1512 | return false; |
a9f1b85e | 1513 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1514 | return false; |
4515148e JL |
1515 | break; |
1516 | } | |
a9f1b85e PS |
1517 | default: |
1518 | WARN_ON(1); | |
1519 | return false; /* don't expect to be here */ | |
1520 | } | |
4515148e | 1521 | |
3eb9a889 BG |
1522 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1523 | return false; | |
1524 | ||
4515148e JL |
1525 | return true; |
1526 | } | |
1527 | ||
daf5b0b6 JL |
1528 | static bool |
1529 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1530 | { | |
1531 | unsigned int secFlags; | |
1532 | ||
1533 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1534 | secFlags = vol->secFlg; | |
1535 | else | |
1536 | secFlags = global_secflags | vol->secFlg; | |
1537 | ||
1538 | switch (server->secType) { | |
1539 | case LANMAN: | |
1540 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1541 | return false; | |
1542 | break; | |
1543 | case NTLMv2: | |
1544 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1545 | return false; | |
1546 | break; | |
1547 | case NTLM: | |
1548 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1549 | return false; | |
1550 | break; | |
1551 | case Kerberos: | |
1552 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1553 | return false; | |
1554 | break; | |
1555 | case RawNTLMSSP: | |
1556 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1557 | return false; | |
1558 | break; | |
1559 | default: | |
1560 | /* shouldn't happen */ | |
1561 | return false; | |
1562 | } | |
1563 | ||
1564 | /* now check if signing mode is acceptible */ | |
1565 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && | |
1566 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1567 | return false; | |
1568 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1569 | (server->secMode & | |
1570 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1571 | return false; | |
1572 | ||
1573 | return true; | |
1574 | } | |
1575 | ||
e7ddee90 | 1576 | static struct TCP_Server_Info * |
daf5b0b6 | 1577 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1578 | { |
e7ddee90 | 1579 | struct TCP_Server_Info *server; |
e7ddee90 | 1580 | |
3f9bcca7 | 1581 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1582 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
3eb9a889 BG |
1583 | if (!match_address(server, addr, |
1584 | (struct sockaddr *)&vol->srcaddr)) | |
4515148e | 1585 | continue; |
1b20d672 | 1586 | |
4b886136 PS |
1587 | if (!match_port(server, addr)) |
1588 | continue; | |
1589 | ||
daf5b0b6 JL |
1590 | if (!match_security(server, vol)) |
1591 | continue; | |
1592 | ||
e7ddee90 | 1593 | ++server->srv_count; |
3f9bcca7 | 1594 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1595 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1596 | return server; |
1da177e4 | 1597 | } |
3f9bcca7 | 1598 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1599 | return NULL; |
1600 | } | |
1b20d672 | 1601 | |
14fbf50d | 1602 | static void |
e7ddee90 | 1603 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1604 | { |
e7ddee90 | 1605 | struct task_struct *task; |
1b20d672 | 1606 | |
3f9bcca7 | 1607 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1608 | if (--server->srv_count > 0) { |
3f9bcca7 | 1609 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1610 | return; |
1da177e4 | 1611 | } |
1b20d672 | 1612 | |
e7ddee90 | 1613 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1614 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1615 | |
e7ddee90 JL |
1616 | spin_lock(&GlobalMid_Lock); |
1617 | server->tcpStatus = CifsExiting; | |
1618 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1619 | |
d2b91521 | 1620 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1621 | cifs_fscache_release_client_cookie(server); |
1622 | ||
21e73393 SP |
1623 | kfree(server->session_key.response); |
1624 | server->session_key.response = NULL; | |
1625 | server->session_key.len = 0; | |
1626 | ||
e7ddee90 JL |
1627 | task = xchg(&server->tsk, NULL); |
1628 | if (task) | |
1629 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1630 | } |
1631 | ||
63c038c2 JL |
1632 | static struct TCP_Server_Info * |
1633 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1634 | { | |
1635 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1636 | struct sockaddr_storage addr; |
63c038c2 JL |
1637 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1638 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1639 | int rc; | |
1640 | ||
a9ac49d3 | 1641 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1642 | |
b6b38f70 | 1643 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1644 | |
1e68b2b2 | 1645 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1646 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1647 | volume_info->UNCip, | |
67b7626a | 1648 | strlen(volume_info->UNCip), |
50d97160 | 1649 | volume_info->port); |
1e68b2b2 | 1650 | if (!rc) { |
63c038c2 JL |
1651 | /* we failed translating address */ |
1652 | rc = -EINVAL; | |
1653 | goto out_err; | |
1654 | } | |
63c038c2 JL |
1655 | } else if (volume_info->UNCip) { |
1656 | /* BB using ip addr as tcp_ses name to connect to the | |
1657 | DFS root below */ | |
b6b38f70 | 1658 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1659 | rc = -EINVAL; |
1660 | goto out_err; | |
1661 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1662 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1663 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1664 | rc = -EINVAL; |
1665 | goto out_err; | |
1666 | } | |
1667 | ||
1668 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1669 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1670 | if (tcp_ses) |
1671 | return tcp_ses; | |
1672 | ||
1673 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1674 | if (!tcp_ses) { | |
1675 | rc = -ENOMEM; | |
1676 | goto out_err; | |
1677 | } | |
1678 | ||
d2b91521 SP |
1679 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1680 | if (rc) { | |
1681 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1682 | goto out_err; | |
1683 | } | |
1684 | ||
63c038c2 JL |
1685 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1686 | if (IS_ERR(tcp_ses->hostname)) { | |
1687 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1688 | goto out_err_crypto_release; |
63c038c2 JL |
1689 | } |
1690 | ||
1691 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1692 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1693 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1694 | atomic_set(&tcp_ses->inFlight, 0); |
1695 | init_waitqueue_head(&tcp_ses->response_q); | |
1696 | init_waitqueue_head(&tcp_ses->request_q); | |
1697 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1698 | mutex_init(&tcp_ses->srv_mutex); | |
1699 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1700 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1701 | memcpy(tcp_ses->server_RFC1001_name, | |
1702 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1703 | tcp_ses->session_estab = false; |
63c038c2 JL |
1704 | tcp_ses->sequence_number = 0; |
1705 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); | |
1706 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
1707 | ||
1708 | /* | |
1709 | * at this point we are the only ones with the pointer | |
1710 | * to the struct since the kernel thread not created yet | |
1711 | * no need to spinlock this init of tcpStatus or srv_count | |
1712 | */ | |
1713 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1714 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1715 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1716 | ++tcp_ses->srv_count; |
1717 | ||
a9ac49d3 | 1718 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1719 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1720 | /* BB should we allow ipv6 on port 139? */ |
1721 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1722 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1723 | sizeof(struct sockaddr_in6)); | |
1724 | } else | |
1725 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1726 | sizeof(struct sockaddr_in)); | |
1727 | ||
1728 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1729 | if (rc < 0) { |
b6b38f70 | 1730 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1731 | goto out_err_crypto_release; |
63c038c2 JL |
1732 | } |
1733 | ||
1734 | /* | |
1735 | * since we're in a cifs function already, we know that | |
1736 | * this will succeed. No need for try_module_get(). | |
1737 | */ | |
1738 | __module_get(THIS_MODULE); | |
1739 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1740 | tcp_ses, "cifsd"); | |
1741 | if (IS_ERR(tcp_ses->tsk)) { | |
1742 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1743 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1744 | module_put(THIS_MODULE); |
f7c5445a | 1745 | goto out_err_crypto_release; |
63c038c2 JL |
1746 | } |
1747 | ||
1748 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1749 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1750 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1751 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1752 | |
488f1d2d SJ |
1753 | cifs_fscache_get_client_cookie(tcp_ses); |
1754 | ||
63c038c2 JL |
1755 | return tcp_ses; |
1756 | ||
f7c5445a | 1757 | out_err_crypto_release: |
d2b91521 SP |
1758 | cifs_crypto_shash_release(tcp_ses); |
1759 | ||
63c038c2 JL |
1760 | out_err: |
1761 | if (tcp_ses) { | |
8347a5cd SF |
1762 | if (!IS_ERR(tcp_ses->hostname)) |
1763 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1764 | if (tcp_ses->ssocket) |
1765 | sock_release(tcp_ses->ssocket); | |
1766 | kfree(tcp_ses); | |
1767 | } | |
1768 | return ERR_PTR(rc); | |
1769 | } | |
1770 | ||
14fbf50d | 1771 | static struct cifsSesInfo * |
4ff67b72 | 1772 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1773 | { |
14fbf50d | 1774 | struct cifsSesInfo *ses; |
dea570e0 | 1775 | |
3f9bcca7 | 1776 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 JL |
1777 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
1778 | switch (server->secType) { | |
1779 | case Kerberos: | |
3e4b3e1f | 1780 | if (vol->cred_uid != ses->cred_uid) |
4ff67b72 JL |
1781 | continue; |
1782 | break; | |
1783 | default: | |
1784 | /* anything else takes username/password */ | |
1785 | if (strncmp(ses->userName, vol->username, | |
1786 | MAX_USERNAME_SIZE)) | |
1787 | continue; | |
1788 | if (strlen(vol->username) != 0 && | |
24e6cf92 | 1789 | ses->password != NULL && |
fc87a406 JL |
1790 | strncmp(ses->password, |
1791 | vol->password ? vol->password : "", | |
4ff67b72 JL |
1792 | MAX_PASSWORD_SIZE)) |
1793 | continue; | |
1794 | } | |
14fbf50d | 1795 | ++ses->ses_count; |
3f9bcca7 | 1796 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1797 | return ses; |
1798 | } | |
3f9bcca7 | 1799 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1800 | return NULL; |
1801 | } | |
dea570e0 | 1802 | |
14fbf50d JL |
1803 | static void |
1804 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1805 | { | |
1806 | int xid; | |
1807 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1808 | |
36988c76 | 1809 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1810 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1811 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1812 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1813 | return; |
1814 | } | |
dea570e0 | 1815 | |
14fbf50d | 1816 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1817 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1818 | |
14fbf50d JL |
1819 | if (ses->status == CifsGood) { |
1820 | xid = GetXid(); | |
1821 | CIFSSMBLogoff(xid, ses); | |
1822 | _FreeXid(xid); | |
1823 | } | |
1824 | sesInfoFree(ses); | |
1825 | cifs_put_tcp_session(server); | |
1826 | } | |
dea570e0 | 1827 | |
36988c76 JL |
1828 | static struct cifsSesInfo * |
1829 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1830 | { | |
1831 | int rc = -ENOMEM, xid; | |
1832 | struct cifsSesInfo *ses; | |
a9f1b85e PS |
1833 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1834 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1835 | |
1836 | xid = GetXid(); | |
1837 | ||
4ff67b72 | 1838 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1839 | if (ses) { |
1840 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1841 | ||
36988c76 | 1842 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1843 | rc = cifs_negotiate_protocol(xid, ses); |
1844 | if (rc) { | |
1845 | mutex_unlock(&ses->session_mutex); | |
1846 | /* problem -- put our ses reference */ | |
1847 | cifs_put_smb_ses(ses); | |
1848 | FreeXid(xid); | |
1849 | return ERR_PTR(rc); | |
1850 | } | |
36988c76 JL |
1851 | if (ses->need_reconnect) { |
1852 | cFYI(1, "Session needs reconnect"); | |
1853 | rc = cifs_setup_session(xid, ses, | |
1854 | volume_info->local_nls); | |
1855 | if (rc) { | |
1856 | mutex_unlock(&ses->session_mutex); | |
1857 | /* problem -- put our reference */ | |
1858 | cifs_put_smb_ses(ses); | |
1859 | FreeXid(xid); | |
1860 | return ERR_PTR(rc); | |
1861 | } | |
1862 | } | |
1863 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1864 | |
1865 | /* existing SMB ses has a server reference already */ | |
1866 | cifs_put_tcp_session(server); | |
36988c76 JL |
1867 | FreeXid(xid); |
1868 | return ses; | |
1869 | } | |
1870 | ||
1871 | cFYI(1, "Existing smb sess not found"); | |
1872 | ses = sesInfoAlloc(); | |
1873 | if (ses == NULL) | |
1874 | goto get_ses_fail; | |
1875 | ||
1876 | /* new SMB session uses our server ref */ | |
1877 | ses->server = server; | |
a9f1b85e PS |
1878 | if (server->dstaddr.ss_family == AF_INET6) |
1879 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 1880 | else |
a9f1b85e | 1881 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 JL |
1882 | |
1883 | if (volume_info->username) | |
1884 | strncpy(ses->userName, volume_info->username, | |
1885 | MAX_USERNAME_SIZE); | |
1886 | ||
1887 | /* volume_info->password freed at unmount */ | |
1888 | if (volume_info->password) { | |
1889 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1890 | if (!ses->password) | |
1891 | goto get_ses_fail; | |
1892 | } | |
1893 | if (volume_info->domainname) { | |
d3686d54 SP |
1894 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
1895 | if (!ses->domainName) | |
1896 | goto get_ses_fail; | |
36988c76 | 1897 | } |
3e4b3e1f | 1898 | ses->cred_uid = volume_info->cred_uid; |
36988c76 JL |
1899 | ses->linux_uid = volume_info->linux_uid; |
1900 | ses->overrideSecFlg = volume_info->secFlg; | |
1901 | ||
1902 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
1903 | rc = cifs_negotiate_protocol(xid, ses); |
1904 | if (!rc) | |
1905 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 1906 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 1907 | if (rc) |
36988c76 JL |
1908 | goto get_ses_fail; |
1909 | ||
1910 | /* success, put it on the list */ | |
3f9bcca7 | 1911 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 1912 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 1913 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
1914 | |
1915 | FreeXid(xid); | |
1916 | return ses; | |
1917 | ||
1918 | get_ses_fail: | |
1919 | sesInfoFree(ses); | |
1920 | FreeXid(xid); | |
1921 | return ERR_PTR(rc); | |
1922 | } | |
1923 | ||
f1987b44 JL |
1924 | static struct cifsTconInfo * |
1925 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
1926 | { | |
1927 | struct list_head *tmp; | |
1928 | struct cifsTconInfo *tcon; | |
1929 | ||
3f9bcca7 | 1930 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1931 | list_for_each(tmp, &ses->tcon_list) { |
1932 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
1933 | if (tcon->tidStatus == CifsExiting) | |
1934 | continue; | |
1935 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
dea570e0 SF |
1936 | continue; |
1937 | ||
f1987b44 | 1938 | ++tcon->tc_count; |
3f9bcca7 | 1939 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1940 | return tcon; |
1da177e4 | 1941 | } |
3f9bcca7 | 1942 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1943 | return NULL; |
1944 | } | |
1945 | ||
f1987b44 JL |
1946 | static void |
1947 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
1948 | { | |
1949 | int xid; | |
1950 | struct cifsSesInfo *ses = tcon->ses; | |
1951 | ||
d00c28de | 1952 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 1953 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 1954 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 1955 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1956 | return; |
1957 | } | |
1958 | ||
1959 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 1960 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
1961 | |
1962 | xid = GetXid(); | |
1963 | CIFSSMBTDis(xid, tcon); | |
1964 | _FreeXid(xid); | |
1965 | ||
d03382ce | 1966 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 1967 | tconInfoFree(tcon); |
f1987b44 JL |
1968 | cifs_put_smb_ses(ses); |
1969 | } | |
1970 | ||
d00c28de JL |
1971 | static struct cifsTconInfo * |
1972 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
1973 | { | |
1974 | int rc, xid; | |
1975 | struct cifsTconInfo *tcon; | |
1976 | ||
1977 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
1978 | if (tcon) { | |
1979 | cFYI(1, "Found match on UNC path"); | |
1980 | /* existing tcon already has a reference */ | |
1981 | cifs_put_smb_ses(ses); | |
1982 | if (tcon->seal != volume_info->seal) | |
1983 | cERROR(1, "transport encryption setting " | |
1984 | "conflicts with existing tid"); | |
1985 | return tcon; | |
1986 | } | |
1987 | ||
1988 | tcon = tconInfoAlloc(); | |
1989 | if (tcon == NULL) { | |
1990 | rc = -ENOMEM; | |
1991 | goto out_fail; | |
1992 | } | |
1993 | ||
1994 | tcon->ses = ses; | |
1995 | if (volume_info->password) { | |
1996 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1997 | if (!tcon->password) { | |
1998 | rc = -ENOMEM; | |
1999 | goto out_fail; | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2004 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2005 | cERROR(1, "Missing share name"); | |
2006 | rc = -ENODEV; | |
2007 | goto out_fail; | |
2008 | } | |
2009 | ||
2010 | /* BB Do we need to wrap session_mutex around | |
2011 | * this TCon call and Unix SetFS as | |
2012 | * we do on SessSetup and reconnect? */ | |
2013 | xid = GetXid(); | |
2014 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2015 | FreeXid(xid); | |
2016 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2017 | if (rc) | |
2018 | goto out_fail; | |
2019 | ||
2020 | if (volume_info->nodfs) { | |
2021 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2022 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2023 | } | |
2024 | tcon->seal = volume_info->seal; | |
2025 | /* we can have only one retry value for a connection | |
2026 | to a share so for resources mounted more than once | |
2027 | to the same server share the last value passed in | |
2028 | for the retry flag is used */ | |
2029 | tcon->retry = volume_info->retry; | |
2030 | tcon->nocase = volume_info->nocase; | |
2031 | tcon->local_lease = volume_info->local_lease; | |
2032 | ||
3f9bcca7 | 2033 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2034 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2035 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2036 | |
d03382ce SJ |
2037 | cifs_fscache_get_super_cookie(tcon); |
2038 | ||
d00c28de JL |
2039 | return tcon; |
2040 | ||
2041 | out_fail: | |
2042 | tconInfoFree(tcon); | |
2043 | return ERR_PTR(rc); | |
2044 | } | |
2045 | ||
9d002df4 JL |
2046 | void |
2047 | cifs_put_tlink(struct tcon_link *tlink) | |
2048 | { | |
2049 | if (!tlink || IS_ERR(tlink)) | |
2050 | return; | |
2051 | ||
2052 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2053 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2054 | tlink->tl_time = jiffies; | |
2055 | return; | |
2056 | } | |
2057 | ||
2058 | if (!IS_ERR(tlink_tcon(tlink))) | |
2059 | cifs_put_tcon(tlink_tcon(tlink)); | |
2060 | kfree(tlink); | |
2061 | return; | |
2062 | } | |
d00c28de | 2063 | |
1da177e4 | 2064 | int |
50c2f753 SF |
2065 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
2066 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 2067 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2068 | { |
2069 | char *temp_unc; | |
2070 | int rc = 0; | |
2071 | ||
2072 | *pnum_referrals = 0; | |
366781c1 | 2073 | *preferrals = NULL; |
1da177e4 LT |
2074 | |
2075 | if (pSesInfo->ipc_tid == 0) { | |
2076 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2077 | strnlen(pSesInfo->serverName, |
2078 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2079 | + 1 + 4 /* slash IPC$ */ + 2, |
2080 | GFP_KERNEL); | |
2081 | if (temp_unc == NULL) | |
2082 | return -ENOMEM; | |
2083 | temp_unc[0] = '\\'; | |
2084 | temp_unc[1] = '\\'; | |
2085 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2086 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2087 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2088 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2089 | kfree(temp_unc); |
2090 | } | |
2091 | if (rc == 0) | |
c2cf07d5 | 2092 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2093 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2094 | /* BB map targetUNCs to dfs_info3 structures, here or |
2095 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2096 | |
2097 | return rc; | |
2098 | } | |
2099 | ||
09e50d55 JL |
2100 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2101 | static struct lock_class_key cifs_key[2]; | |
2102 | static struct lock_class_key cifs_slock_key[2]; | |
2103 | ||
2104 | static inline void | |
2105 | cifs_reclassify_socket4(struct socket *sock) | |
2106 | { | |
2107 | struct sock *sk = sock->sk; | |
2108 | BUG_ON(sock_owned_by_user(sk)); | |
2109 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2110 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2111 | } | |
2112 | ||
2113 | static inline void | |
2114 | cifs_reclassify_socket6(struct socket *sock) | |
2115 | { | |
2116 | struct sock *sk = sock->sk; | |
2117 | BUG_ON(sock_owned_by_user(sk)); | |
2118 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2119 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2120 | } | |
2121 | #else | |
2122 | static inline void | |
2123 | cifs_reclassify_socket4(struct socket *sock) | |
2124 | { | |
2125 | } | |
2126 | ||
2127 | static inline void | |
2128 | cifs_reclassify_socket6(struct socket *sock) | |
2129 | { | |
2130 | } | |
2131 | #endif | |
2132 | ||
1da177e4 | 2133 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2134 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2135 | { |
50c2f753 | 2136 | unsigned int i, j; |
1da177e4 | 2137 | |
50c2f753 | 2138 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2139 | /* mask a nibble at a time and encode */ |
2140 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2141 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2142 | j += 2; |
1da177e4 LT |
2143 | } |
2144 | ||
2145 | } | |
2146 | ||
3eb9a889 BG |
2147 | static int |
2148 | bind_socket(struct TCP_Server_Info *server) | |
2149 | { | |
2150 | int rc = 0; | |
2151 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2152 | /* Bind to the specified local IP address */ | |
2153 | struct socket *socket = server->ssocket; | |
2154 | rc = socket->ops->bind(socket, | |
2155 | (struct sockaddr *) &server->srcaddr, | |
2156 | sizeof(server->srcaddr)); | |
2157 | if (rc < 0) { | |
2158 | struct sockaddr_in *saddr4; | |
2159 | struct sockaddr_in6 *saddr6; | |
2160 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2161 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2162 | if (saddr6->sin6_family == AF_INET6) | |
2163 | cERROR(1, "cifs: " | |
2164 | "Failed to bind to: %pI6c, error: %d\n", | |
2165 | &saddr6->sin6_addr, rc); | |
2166 | else | |
2167 | cERROR(1, "cifs: " | |
2168 | "Failed to bind to: %pI4, error: %d\n", | |
2169 | &saddr4->sin_addr.s_addr, rc); | |
2170 | } | |
2171 | } | |
2172 | return rc; | |
2173 | } | |
1da177e4 LT |
2174 | |
2175 | static int | |
a9f1b85e | 2176 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2177 | { |
2178 | int rc = 0; | |
a9f1b85e PS |
2179 | /* |
2180 | * some servers require RFC1001 sessinit before sending | |
2181 | * negprot - BB check reconnection in case where second | |
2182 | * sessinit is sent but no second negprot | |
2183 | */ | |
2184 | struct rfc1002_session_packet *ses_init_buf; | |
2185 | struct smb_hdr *smb_buf; | |
2186 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2187 | GFP_KERNEL); | |
2188 | if (ses_init_buf) { | |
2189 | ses_init_buf->trailer.session_req.called_len = 32; | |
2190 | ||
2191 | if (server->server_RFC1001_name && | |
2192 | server->server_RFC1001_name[0] != 0) | |
2193 | rfc1002mangle(ses_init_buf->trailer. | |
2194 | session_req.called_name, | |
2195 | server->server_RFC1001_name, | |
2196 | RFC1001_NAME_LEN_WITH_NULL); | |
2197 | else | |
2198 | rfc1002mangle(ses_init_buf->trailer. | |
2199 | session_req.called_name, | |
2200 | DEFAULT_CIFS_CALLED_NAME, | |
2201 | RFC1001_NAME_LEN_WITH_NULL); | |
2202 | ||
2203 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2204 | ||
2205 | /* | |
2206 | * calling name ends in null (byte 16) from old smb | |
2207 | * convention. | |
2208 | */ | |
2209 | if (server->workstation_RFC1001_name && | |
2210 | server->workstation_RFC1001_name[0] != 0) | |
2211 | rfc1002mangle(ses_init_buf->trailer. | |
2212 | session_req.calling_name, | |
2213 | server->workstation_RFC1001_name, | |
2214 | RFC1001_NAME_LEN_WITH_NULL); | |
2215 | else | |
2216 | rfc1002mangle(ses_init_buf->trailer. | |
2217 | session_req.calling_name, | |
2218 | "LINUX_CIFS_CLNT", | |
2219 | RFC1001_NAME_LEN_WITH_NULL); | |
2220 | ||
2221 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2222 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2223 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2224 | ||
2225 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
2226 | smb_buf->smb_buf_length = 0x81000044; | |
2227 | rc = smb_send(server, smb_buf, 0x44); | |
2228 | kfree(ses_init_buf); | |
2229 | /* | |
2230 | * RFC1001 layer in at least one server | |
2231 | * requires very short break before negprot | |
2232 | * presumably because not expecting negprot | |
2233 | * to follow so fast. This is a simple | |
2234 | * solution that works without | |
2235 | * complicating the code and causes no | |
2236 | * significant slowing down on mount | |
2237 | * for everyone else | |
2238 | */ | |
2239 | usleep_range(1000, 2000); | |
2240 | } | |
2241 | /* | |
2242 | * else the negprot may still work without this | |
2243 | * even though malloc failed | |
2244 | */ | |
2245 | ||
2246 | return rc; | |
2247 | } | |
2248 | ||
2249 | static int | |
2250 | generic_ip_connect(struct TCP_Server_Info *server) | |
2251 | { | |
2252 | int rc = 0; | |
2253 | unsigned short int sport; | |
2254 | int slen, sfamily; | |
bcf4b106 | 2255 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2256 | struct sockaddr *saddr; |
2257 | ||
2258 | saddr = (struct sockaddr *) &server->dstaddr; | |
2259 | ||
2260 | if (server->dstaddr.ss_family == AF_INET6) { | |
2261 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2262 | slen = sizeof(struct sockaddr_in6); | |
2263 | sfamily = AF_INET6; | |
2264 | } else { | |
2265 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2266 | slen = sizeof(struct sockaddr_in); | |
2267 | sfamily = AF_INET; | |
2268 | } | |
1da177e4 | 2269 | |
bcf4b106 | 2270 | if (socket == NULL) { |
a9f1b85e | 2271 | rc = sock_create_kern(sfamily, SOCK_STREAM, |
bcf4b106 | 2272 | IPPROTO_TCP, &socket); |
1da177e4 | 2273 | if (rc < 0) { |
b6b38f70 | 2274 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2275 | server->ssocket = NULL; |
1da177e4 | 2276 | return rc; |
1da177e4 | 2277 | } |
bcf4b106 JL |
2278 | |
2279 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2280 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2281 | server->ssocket = socket; |
2282 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2283 | if (sfamily == AF_INET6) |
2284 | cifs_reclassify_socket6(socket); | |
2285 | else | |
2286 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2287 | } |
2288 | ||
3eb9a889 BG |
2289 | rc = bind_socket(server); |
2290 | if (rc < 0) | |
2291 | return rc; | |
2292 | ||
a9f1b85e PS |
2293 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2294 | if (rc < 0) { | |
2295 | cFYI(1, "Error %d connecting to server", rc); | |
bcf4b106 JL |
2296 | sock_release(socket); |
2297 | server->ssocket = NULL; | |
1da177e4 LT |
2298 | return rc; |
2299 | } | |
bcf4b106 | 2300 | |
bcf4b106 JL |
2301 | /* |
2302 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2303 | * the default. sock_setsockopt not used because it expects |
2304 | * user space buffer | |
bcf4b106 JL |
2305 | */ |
2306 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2307 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2308 | |
b387eaeb | 2309 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2310 | if (server->noautotune) { |
2311 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2312 | socket->sk->sk_sndbuf = 200 * 1024; | |
2313 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2314 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2315 | } |
1da177e4 | 2316 | |
6a5fa236 | 2317 | if (server->tcp_nodelay) { |
a9f1b85e | 2318 | int val = 1; |
6a5fa236 SF |
2319 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2320 | (char *)&val, sizeof(val)); | |
2321 | if (rc) | |
b6b38f70 | 2322 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2323 | } |
2324 | ||
b6b38f70 | 2325 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2326 | socket->sk->sk_sndbuf, |
b6b38f70 | 2327 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2328 | |
a9f1b85e PS |
2329 | if (sport == htons(RFC1001_PORT)) |
2330 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2331 | |
1da177e4 LT |
2332 | return rc; |
2333 | } | |
2334 | ||
2335 | static int | |
a9f1b85e | 2336 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2337 | { |
a9f1b85e PS |
2338 | unsigned short int *sport; |
2339 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2340 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2341 | |
a9f1b85e PS |
2342 | if (server->dstaddr.ss_family == AF_INET6) |
2343 | sport = &addr6->sin6_port; | |
2344 | else | |
2345 | sport = &addr->sin_port; | |
1da177e4 | 2346 | |
a9f1b85e PS |
2347 | if (*sport == 0) { |
2348 | int rc; | |
1da177e4 | 2349 | |
a9f1b85e PS |
2350 | /* try with 445 port at first */ |
2351 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2352 | |
a9f1b85e | 2353 | rc = generic_ip_connect(server); |
1da177e4 | 2354 | if (rc >= 0) |
a9f1b85e | 2355 | return rc; |
6a5fa236 | 2356 | |
a9f1b85e PS |
2357 | /* if it failed, try with 139 port */ |
2358 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2359 | } |
2360 | ||
a9f1b85e | 2361 | return generic_ip_connect(server); |
1da177e4 LT |
2362 | } |
2363 | ||
50c2f753 SF |
2364 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2365 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2366 | { |
2367 | /* if we are reconnecting then should we check to see if | |
2368 | * any requested capabilities changed locally e.g. via | |
2369 | * remount but we can not do much about it here | |
2370 | * if they have (even if we could detect it by the following) | |
2371 | * Perhaps we could add a backpointer to array of sb from tcon | |
2372 | * or if we change to make all sb to same share the same | |
2373 | * sb as NFS - then we only have one backpointer to sb. | |
2374 | * What if we wanted to mount the server share twice once with | |
2375 | * and once without posixacls or posix paths? */ | |
2376 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2377 | |
c18c842b SF |
2378 | if (vol_info && vol_info->no_linux_ext) { |
2379 | tcon->fsUnixInfo.Capability = 0; | |
2380 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2381 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2382 | return; |
2383 | } else if (vol_info) | |
2384 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2385 | ||
2386 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2387 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2388 | return; |
2389 | } | |
50c2f753 | 2390 | |
fb8c4b14 | 2391 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2392 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
50c2f753 | 2393 | |
8af18971 SF |
2394 | /* check for reconnect case in which we do not |
2395 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2396 | if (vol_info == NULL) { |
50c2f753 | 2397 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2398 | originally at mount time */ |
2399 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2400 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2401 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2402 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2403 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2404 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2405 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2406 | cERROR(1, "possible reconnect error"); |
2407 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2408 | } |
8af18971 | 2409 | } |
50c2f753 | 2410 | |
8af18971 | 2411 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2412 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2413 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2414 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2415 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2416 | if (sb) |
8af18971 SF |
2417 | sb->s_flags |= MS_POSIXACL; |
2418 | } | |
2419 | ||
75865f8c | 2420 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2421 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2422 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2423 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2424 | if (sb) |
50c2f753 | 2425 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2426 | CIFS_MOUNT_POSIX_PATHS; |
2427 | } | |
50c2f753 | 2428 | |
984acfe1 SF |
2429 | /* We might be setting the path sep back to a different |
2430 | form if we are reconnecting and the server switched its | |
50c2f753 | 2431 | posix path capability for this share */ |
75865f8c | 2432 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2433 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2434 | |
2435 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2436 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2437 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2438 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2439 | } |
2440 | } | |
50c2f753 SF |
2441 | |
2442 | ||
b6b38f70 | 2443 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2444 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2445 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2446 | cFYI(1, "FCNTL cap"); |
75865f8c | 2447 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2448 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2449 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2450 | cFYI(1, "POSIX path cap"); |
75865f8c | 2451 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2452 | cFYI(1, "XATTR cap"); |
75865f8c | 2453 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2454 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2455 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2456 | cFYI(1, "very large read cap"); |
75865f8c | 2457 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2458 | cFYI(1, "very large write cap"); |
8af18971 SF |
2459 | #endif /* CIFS_DEBUG2 */ |
2460 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2461 | if (vol_info == NULL) { |
b6b38f70 | 2462 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2463 | } else |
b6b38f70 | 2464 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2465 | "with the server failed. Consider " |
2466 | "mounting with the Unix Extensions\n" | |
2467 | "disabled, if problems are found, " | |
2468 | "by specifying the nounix mount " | |
b6b38f70 | 2469 | "option."); |
5a44b319 | 2470 | |
8af18971 SF |
2471 | } |
2472 | } | |
2473 | } | |
2474 | ||
03a143c9 SF |
2475 | static void |
2476 | convert_delimiter(char *path, char delim) | |
2477 | { | |
2478 | int i; | |
c2d68ea6 | 2479 | char old_delim; |
03a143c9 SF |
2480 | |
2481 | if (path == NULL) | |
2482 | return; | |
2483 | ||
582d21e5 | 2484 | if (delim == '/') |
c2d68ea6 SF |
2485 | old_delim = '\\'; |
2486 | else | |
2487 | old_delim = '/'; | |
2488 | ||
03a143c9 | 2489 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2490 | if (path[i] == old_delim) |
03a143c9 SF |
2491 | path[i] = delim; |
2492 | } | |
2493 | } | |
2494 | ||
3b795210 SF |
2495 | static void setup_cifs_sb(struct smb_vol *pvolume_info, |
2496 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2497 | { |
2de970ff JL |
2498 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2499 | ||
3b795210 | 2500 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2501 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2502 | pvolume_info->rsize); | |
3b795210 SF |
2503 | cifs_sb->rsize = CIFSMaxBufSize; |
2504 | } else if ((pvolume_info->rsize) && | |
2505 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2506 | cifs_sb->rsize = pvolume_info->rsize; | |
2507 | else /* default */ | |
2508 | cifs_sb->rsize = CIFSMaxBufSize; | |
2509 | ||
2510 | if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) { | |
b6b38f70 JP |
2511 | cERROR(1, "wsize %d too large, using 4096 instead", |
2512 | pvolume_info->wsize); | |
3b795210 SF |
2513 | cifs_sb->wsize = 4096; |
2514 | } else if (pvolume_info->wsize) | |
2515 | cifs_sb->wsize = pvolume_info->wsize; | |
2516 | else | |
2517 | cifs_sb->wsize = min_t(const int, | |
2518 | PAGEVEC_SIZE * PAGE_CACHE_SIZE, | |
2519 | 127*1024); | |
2520 | /* old default of CIFSMaxBufSize was too small now | |
2521 | that SMB Write2 can send multiple pages in kvec. | |
2522 | RFC1001 does not describe what happens when frame | |
2523 | bigger than 128K is sent so use that as max in | |
2524 | conjunction with 52K kvec constraint on arch with 4K | |
2525 | page size */ | |
2526 | ||
2527 | if (cifs_sb->rsize < 2048) { | |
2528 | cifs_sb->rsize = 2048; | |
2529 | /* Windows ME may prefer this */ | |
b6b38f70 | 2530 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2531 | } |
2532 | /* calculate prepath */ | |
2533 | cifs_sb->prepath = pvolume_info->prepath; | |
2534 | if (cifs_sb->prepath) { | |
2535 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2536 | /* we can not convert the / to \ in the path | |
2537 | separators in the prefixpath yet because we do not | |
2538 | know (until reset_cifs_unix_caps is called later) | |
2539 | whether POSIX PATH CAP is available. We normalize | |
2540 | the / to \ after reset_cifs_unix_caps is called */ | |
2541 | pvolume_info->prepath = NULL; | |
2542 | } else | |
2543 | cifs_sb->prepathlen = 0; | |
2544 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2545 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2546 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2547 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2548 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2549 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2550 | |
6d20e840 SJ |
2551 | cifs_sb->actimeo = pvolume_info->actimeo; |
2552 | ||
3b795210 SF |
2553 | if (pvolume_info->noperm) |
2554 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2555 | if (pvolume_info->setuids) | |
2556 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2557 | if (pvolume_info->server_ino) | |
2558 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2559 | if (pvolume_info->remap) | |
2560 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2561 | if (pvolume_info->no_xattr) | |
2562 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2563 | if (pvolume_info->sfu_emul) | |
2564 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2565 | if (pvolume_info->nobrl) | |
2566 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2567 | if (pvolume_info->nostrictsync) |
4717bed6 | 2568 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2569 | if (pvolume_info->mand_lock) |
2570 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2571 | if (pvolume_info->cifs_acl) |
2572 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2573 | if (pvolume_info->override_uid) | |
2574 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2575 | if (pvolume_info->override_gid) | |
2576 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2577 | if (pvolume_info->dynperm) | |
2578 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2579 | if (pvolume_info->fsc) |
2580 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2581 | if (pvolume_info->multiuser) |
2582 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2583 | CIFS_MOUNT_NO_PERM); | |
3b795210 | 2584 | if (pvolume_info->direct_io) { |
b6b38f70 | 2585 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2586 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2587 | } | |
736a3320 SM |
2588 | if (pvolume_info->mfsymlinks) { |
2589 | if (pvolume_info->sfu_emul) { | |
2590 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2591 | "mount option is used"); | |
2592 | } else { | |
2593 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2594 | } | |
2595 | } | |
3b795210 SF |
2596 | |
2597 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2598 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2599 | "mount option supported"); | |
b1c8d2b4 JL |
2600 | } |
2601 | ||
e4cce94c IM |
2602 | static int |
2603 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2604 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2605 | { | |
2606 | int rc; | |
e4cce94c IM |
2607 | FILE_ALL_INFO *pfile_info; |
2608 | ||
e4cce94c IM |
2609 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2610 | if (pfile_info == NULL) | |
2611 | return -ENOMEM; | |
2612 | ||
2613 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2614 | 0 /* not legacy */, cifs_sb->local_nls, | |
2615 | cifs_sb->mnt_cifs_flags & | |
2616 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2617 | kfree(pfile_info); | |
2618 | return rc; | |
2619 | } | |
2620 | ||
1bfe73c2 IM |
2621 | static void |
2622 | cleanup_volume_info(struct smb_vol **pvolume_info) | |
2623 | { | |
2624 | struct smb_vol *volume_info; | |
2625 | ||
ad6cca6d | 2626 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2627 | return; |
2628 | ||
2629 | volume_info = *pvolume_info; | |
2630 | kzfree(volume_info->password); | |
2631 | kfree(volume_info->UNC); | |
2632 | kfree(volume_info->prepath); | |
2633 | kfree(volume_info); | |
2634 | *pvolume_info = NULL; | |
2635 | return; | |
2636 | } | |
2637 | ||
2d6d589d | 2638 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2639 | /* build_path_to_root returns full path to root when |
2640 | * we do not have an exiting connection (tcon) */ | |
2641 | static char * | |
2642 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2643 | const struct cifs_sb_info *cifs_sb) | |
2644 | { | |
2645 | char *full_path; | |
2646 | ||
2647 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2648 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2649 | if (full_path == NULL) | |
2650 | return ERR_PTR(-ENOMEM); | |
2651 | ||
2652 | strncpy(full_path, volume_info->UNC, unc_len); | |
2653 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2654 | int i; | |
2655 | for (i = 0; i < unc_len; i++) { | |
2656 | if (full_path[i] == '\\') | |
2657 | full_path[i] = '/'; | |
2658 | } | |
2659 | } | |
2660 | ||
2661 | if (cifs_sb->prepathlen) | |
2662 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2663 | cifs_sb->prepathlen); | |
2664 | ||
2665 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2666 | return full_path; | |
2667 | } | |
2d6d589d | 2668 | #endif |
1bfe73c2 | 2669 | |
1da177e4 LT |
2670 | int |
2671 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
1bfe73c2 | 2672 | char *mount_data_global, const char *devname) |
1da177e4 | 2673 | { |
a2934c7b | 2674 | int rc; |
1da177e4 | 2675 | int xid; |
7586b765 | 2676 | struct smb_vol *volume_info; |
a2934c7b JL |
2677 | struct cifsSesInfo *pSesInfo; |
2678 | struct cifsTconInfo *tcon; | |
2679 | struct TCP_Server_Info *srvTcp; | |
e4cce94c | 2680 | char *full_path; |
2d6d589d | 2681 | char *mount_data = mount_data_global; |
9d002df4 | 2682 | struct tcon_link *tlink; |
2d6d589d | 2683 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2684 | struct dfs_info3_param *referrals = NULL; |
2685 | unsigned int num_referrals = 0; | |
5c2503a8 | 2686 | int referral_walks_count = 0; |
1bfe73c2 | 2687 | try_mount_again: |
2d6d589d | 2688 | #endif |
a2934c7b JL |
2689 | rc = 0; |
2690 | tcon = NULL; | |
2691 | pSesInfo = NULL; | |
2692 | srvTcp = NULL; | |
1bfe73c2 | 2693 | full_path = NULL; |
9d002df4 | 2694 | tlink = NULL; |
1da177e4 LT |
2695 | |
2696 | xid = GetXid(); | |
2697 | ||
7586b765 JL |
2698 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2699 | if (!volume_info) { | |
2700 | rc = -ENOMEM; | |
2701 | goto out; | |
2702 | } | |
50c2f753 | 2703 | |
7586b765 | 2704 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) { |
70fe7dc0 JL |
2705 | rc = -EINVAL; |
2706 | goto out; | |
1da177e4 LT |
2707 | } |
2708 | ||
7586b765 | 2709 | if (volume_info->nullauth) { |
b6b38f70 | 2710 | cFYI(1, "null user"); |
7586b765 JL |
2711 | volume_info->username = ""; |
2712 | } else if (volume_info->username) { | |
1da177e4 | 2713 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2714 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2715 | } else { |
bf820679 | 2716 | cifserror("No username specified"); |
50c2f753 SF |
2717 | /* In userspace mount helper we can get user name from alternate |
2718 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2719 | rc = -EINVAL; |
2720 | goto out; | |
1da177e4 LT |
2721 | } |
2722 | ||
1da177e4 | 2723 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2724 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2725 | /* load_nls_default cannot return null */ |
2726 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2727 | } else { |
a5fc4ce0 JL |
2728 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2729 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2730 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2731 | volume_info->iocharset); | |
70fe7dc0 JL |
2732 | rc = -ELIBACC; |
2733 | goto out; | |
1da177e4 LT |
2734 | } |
2735 | } | |
a5fc4ce0 | 2736 | cifs_sb->local_nls = volume_info->local_nls; |
1da177e4 | 2737 | |
63c038c2 | 2738 | /* get a reference to a tcp session */ |
7586b765 | 2739 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
2740 | if (IS_ERR(srvTcp)) { |
2741 | rc = PTR_ERR(srvTcp); | |
2742 | goto out; | |
1da177e4 LT |
2743 | } |
2744 | ||
36988c76 JL |
2745 | /* get a reference to a SMB session */ |
2746 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
2747 | if (IS_ERR(pSesInfo)) { | |
2748 | rc = PTR_ERR(pSesInfo); | |
2749 | pSesInfo = NULL; | |
2750 | goto mount_fail_check; | |
1da177e4 | 2751 | } |
50c2f753 | 2752 | |
d00c28de JL |
2753 | setup_cifs_sb(volume_info, cifs_sb); |
2754 | if (pSesInfo->capabilities & CAP_LARGE_FILES) | |
2755 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2756 | else | |
2757 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 2758 | |
8af18971 | 2759 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
2760 | sb->s_time_gran = 100; |
2761 | ||
d00c28de JL |
2762 | /* search for existing tcon to this server share */ |
2763 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
2764 | if (IS_ERR(tcon)) { | |
2765 | rc = PTR_ERR(tcon); | |
2766 | tcon = NULL; | |
1bfe73c2 | 2767 | goto remote_path_check; |
d00c28de | 2768 | } |
1bfe73c2 | 2769 | |
d82c2df5 SF |
2770 | /* do not care if following two calls succeed - informational */ |
2771 | if (!tcon->ipc) { | |
2772 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
2773 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
2774 | } | |
03a143c9 | 2775 | |
d82c2df5 SF |
2776 | /* tell server which Unix caps we support */ |
2777 | if (tcon->ses->capabilities & CAP_UNIX) | |
2778 | /* reset of caps checks mount to see if unix extensions | |
2779 | disabled for just this mount */ | |
7586b765 | 2780 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
d82c2df5 SF |
2781 | else |
2782 | tcon->unix_ext = 0; /* server does not support them */ | |
c18c842b | 2783 | |
d82c2df5 SF |
2784 | /* convert forward to back slashes in prepath here if needed */ |
2785 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2786 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 2787 | |
d82c2df5 SF |
2788 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
2789 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 2790 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 2791 | } |
d82c2df5 SF |
2792 | if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X)) |
2793 | cifs_sb->wsize = min(cifs_sb->wsize, | |
2794 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
2795 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) | |
2796 | cifs_sb->rsize = min(cifs_sb->rsize, | |
2797 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 2798 | |
1bfe73c2 IM |
2799 | remote_path_check: |
2800 | /* check if a whole path (including prepath) is not remote */ | |
2801 | if (!rc && cifs_sb->prepathlen && tcon) { | |
e4cce94c | 2802 | /* build_path_to_root works only when we have a valid tcon */ |
7d161b7f | 2803 | full_path = cifs_build_path_to_root(cifs_sb, tcon); |
e4cce94c IM |
2804 | if (full_path == NULL) { |
2805 | rc = -ENOMEM; | |
2806 | goto mount_fail_check; | |
2807 | } | |
2808 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 2809 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
2810 | kfree(full_path); |
2811 | goto mount_fail_check; | |
2812 | } | |
2813 | kfree(full_path); | |
2814 | } | |
2815 | ||
1bfe73c2 IM |
2816 | /* get referral if needed */ |
2817 | if (rc == -EREMOTE) { | |
d036f50f | 2818 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
2819 | if (referral_walks_count > MAX_NESTED_LINKS) { |
2820 | /* | |
2821 | * BB: when we implement proper loop detection, | |
2822 | * we will remove this check. But now we need it | |
2823 | * to prevent an indefinite loop if 'DFS tree' is | |
2824 | * misconfigured (i.e. has loops). | |
2825 | */ | |
2826 | rc = -ELOOP; | |
2827 | goto mount_fail_check; | |
2828 | } | |
1bfe73c2 IM |
2829 | /* convert forward to back slashes in prepath here if needed */ |
2830 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2831 | convert_delimiter(cifs_sb->prepath, | |
2832 | CIFS_DIR_SEP(cifs_sb)); | |
2833 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2834 | if (IS_ERR(full_path)) { | |
2835 | rc = PTR_ERR(full_path); | |
2836 | goto mount_fail_check; | |
2837 | } | |
2838 | ||
b6b38f70 | 2839 | cFYI(1, "Getting referral for: %s", full_path); |
1bfe73c2 IM |
2840 | rc = get_dfs_path(xid, pSesInfo , full_path + 1, |
2841 | cifs_sb->local_nls, &num_referrals, &referrals, | |
2842 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2843 | if (!rc && num_referrals > 0) { | |
2844 | char *fake_devname = NULL; | |
2845 | ||
2846 | if (mount_data != mount_data_global) | |
2847 | kfree(mount_data); | |
7b91e266 | 2848 | |
1bfe73c2 IM |
2849 | mount_data = cifs_compose_mount_options( |
2850 | cifs_sb->mountdata, full_path + 1, | |
2851 | referrals, &fake_devname); | |
7b91e266 | 2852 | |
1bfe73c2 | 2853 | free_dfs_info_array(referrals, num_referrals); |
7b91e266 JL |
2854 | kfree(fake_devname); |
2855 | kfree(full_path); | |
2856 | ||
2857 | if (IS_ERR(mount_data)) { | |
2858 | rc = PTR_ERR(mount_data); | |
2859 | mount_data = NULL; | |
2860 | goto mount_fail_check; | |
2861 | } | |
1bfe73c2 IM |
2862 | |
2863 | if (tcon) | |
2864 | cifs_put_tcon(tcon); | |
2865 | else if (pSesInfo) | |
2866 | cifs_put_smb_ses(pSesInfo); | |
2867 | ||
2868 | cleanup_volume_info(&volume_info); | |
5c2503a8 | 2869 | referral_walks_count++; |
a2934c7b | 2870 | FreeXid(xid); |
1bfe73c2 IM |
2871 | goto try_mount_again; |
2872 | } | |
d036f50f SF |
2873 | #else /* No DFS support, return error on mount */ |
2874 | rc = -EOPNOTSUPP; | |
2875 | #endif | |
1bfe73c2 IM |
2876 | } |
2877 | ||
9d002df4 JL |
2878 | if (rc) |
2879 | goto mount_fail_check; | |
2880 | ||
2881 | /* now, hang the tcon off of the superblock */ | |
2882 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
2883 | if (tlink == NULL) { | |
2884 | rc = -ENOMEM; | |
2885 | goto mount_fail_check; | |
2886 | } | |
2887 | ||
b647c35f | 2888 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
2889 | tlink->tl_tcon = tcon; |
2890 | tlink->tl_time = jiffies; | |
2891 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
2892 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
2893 | ||
b647c35f | 2894 | cifs_sb->master_tlink = tlink; |
9d002df4 | 2895 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 2896 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 2897 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 2898 | |
2de970ff JL |
2899 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
2900 | TLINK_IDLE_EXPIRE); | |
2901 | ||
1bfe73c2 IM |
2902 | mount_fail_check: |
2903 | /* on error free sesinfo and tcon struct if needed */ | |
2904 | if (rc) { | |
2905 | if (mount_data != mount_data_global) | |
2906 | kfree(mount_data); | |
2907 | /* If find_unc succeeded then rc == 0 so we can not end */ | |
2908 | /* up accidently freeing someone elses tcon struct */ | |
2909 | if (tcon) | |
2910 | cifs_put_tcon(tcon); | |
2911 | else if (pSesInfo) | |
2912 | cifs_put_smb_ses(pSesInfo); | |
2913 | else | |
2914 | cifs_put_tcp_session(srvTcp); | |
2915 | goto out; | |
2916 | } | |
2917 | ||
7586b765 | 2918 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
2919 | (in which case it is not needed anymore) but when new sesion is created |
2920 | the password ptr is put in the new session structure (in which case the | |
2921 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
2922 | out: |
2923 | /* zero out password before freeing */ | |
1bfe73c2 | 2924 | cleanup_volume_info(&volume_info); |
1da177e4 LT |
2925 | FreeXid(xid); |
2926 | return rc; | |
2927 | } | |
2928 | ||
1da177e4 LT |
2929 | int |
2930 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
2931 | const char *tree, struct cifsTconInfo *tcon, | |
2932 | const struct nls_table *nls_codepage) | |
2933 | { | |
2934 | struct smb_hdr *smb_buffer; | |
2935 | struct smb_hdr *smb_buffer_response; | |
2936 | TCONX_REQ *pSMB; | |
2937 | TCONX_RSP *pSMBr; | |
2938 | unsigned char *bcc_ptr; | |
2939 | int rc = 0; | |
cc20c031 | 2940 | int length, bytes_left; |
1da177e4 LT |
2941 | __u16 count; |
2942 | ||
2943 | if (ses == NULL) | |
2944 | return -EIO; | |
2945 | ||
2946 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 2947 | if (smb_buffer == NULL) |
1da177e4 | 2948 | return -ENOMEM; |
ca43e3be | 2949 | |
1da177e4 LT |
2950 | smb_buffer_response = smb_buffer; |
2951 | ||
2952 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
2953 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
2954 | |
2955 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
2956 | smb_buffer->Uid = ses->Suid; |
2957 | pSMB = (TCONX_REQ *) smb_buffer; | |
2958 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
2959 | ||
2960 | pSMB->AndXCommand = 0xFF; | |
2961 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 2962 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 2963 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 2964 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 2965 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 2966 | bcc_ptr++; /* skip password */ |
7c7b25bc | 2967 | /* already aligned so no need to do it below */ |
eeac8047 | 2968 | } else { |
7c7b25bc | 2969 | pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
eeac8047 SF |
2970 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
2971 | specified as required (when that support is added to | |
2972 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 2973 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
2974 | by Samba (not sure whether other servers allow |
2975 | NTLMv2 password here) */ | |
7c7b25bc | 2976 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 2977 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 2978 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 2979 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
4e53a3fb JL |
2980 | ses->server->secMode & |
2981 | SECMODE_PW_ENCRYPT ? true : false, | |
2982 | bcc_ptr); | |
7c7b25bc SF |
2983 | else |
2984 | #endif /* CIFS_WEAK_PW_HASH */ | |
d3ba50b1 | 2985 | SMBNTencrypt(tcon->password, ses->server->cryptkey, bcc_ptr); |
eeac8047 | 2986 | |
7c7b25bc | 2987 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
fb8c4b14 | 2988 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
2989 | /* must align unicode strings */ |
2990 | *bcc_ptr = 0; /* null byte password */ | |
2991 | bcc_ptr++; | |
2992 | } | |
eeac8047 | 2993 | } |
1da177e4 | 2994 | |
50c2f753 | 2995 | if (ses->server->secMode & |
a878fb22 | 2996 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
2997 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
2998 | ||
2999 | if (ses->capabilities & CAP_STATUS32) { | |
3000 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3001 | } | |
3002 | if (ses->capabilities & CAP_DFS) { | |
3003 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3004 | } | |
3005 | if (ses->capabilities & CAP_UNICODE) { | |
3006 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3007 | length = | |
50c2f753 SF |
3008 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3009 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3010 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3011 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3012 | bcc_ptr += 2; /* skip trailing null */ |
3013 | } else { /* ASCII */ | |
1da177e4 LT |
3014 | strcpy(bcc_ptr, tree); |
3015 | bcc_ptr += strlen(tree) + 1; | |
3016 | } | |
3017 | strcpy(bcc_ptr, "?????"); | |
3018 | bcc_ptr += strlen("?????"); | |
3019 | bcc_ptr += 1; | |
3020 | count = bcc_ptr - &pSMB->Password[0]; | |
3021 | pSMB->hdr.smb_buf_length += count; | |
3022 | pSMB->ByteCount = cpu_to_le16(count); | |
3023 | ||
133672ef SF |
3024 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
3025 | CIFS_STD_OP); | |
1da177e4 | 3026 | |
1da177e4 LT |
3027 | /* above now done in SendReceive */ |
3028 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3029 | bool is_unicode; |
3030 | ||
1da177e4 | 3031 | tcon->tidStatus = CifsGood; |
3b795210 | 3032 | tcon->need_reconnect = false; |
1da177e4 LT |
3033 | tcon->tid = smb_buffer_response->Tid; |
3034 | bcc_ptr = pByteArea(smb_buffer_response); | |
cc20c031 JL |
3035 | bytes_left = BCC(smb_buffer_response); |
3036 | length = strnlen(bcc_ptr, bytes_left - 2); | |
0e0d2cf3 SF |
3037 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3038 | is_unicode = true; | |
3039 | else | |
3040 | is_unicode = false; | |
3041 | ||
cc20c031 | 3042 | |
50c2f753 | 3043 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3044 | if (length == 3) { |
3045 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3046 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3047 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3048 | tcon->ipc = 1; |
3049 | } | |
3050 | } else if (length == 2) { | |
3051 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3052 | /* the most common case */ | |
b6b38f70 | 3053 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3054 | } |
3055 | } | |
50c2f753 | 3056 | bcc_ptr += length + 1; |
cc20c031 | 3057 | bytes_left -= (length + 1); |
1da177e4 | 3058 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3059 | |
3060 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3061 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3062 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3063 | bytes_left, is_unicode, |
cc20c031 JL |
3064 | nls_codepage); |
3065 | ||
b6b38f70 | 3066 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3067 | |
fb8c4b14 | 3068 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3069 | (smb_buffer_response->WordCount == 7)) |
3070 | /* field is in same location */ | |
3979877e SF |
3071 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3072 | else | |
3073 | tcon->Flags = 0; | |
b6b38f70 | 3074 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3075 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3076 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3077 | ses->ipc_tid = smb_buffer_response->Tid; |
3078 | } | |
3079 | ||
a8a11d39 | 3080 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3081 | return rc; |
3082 | } | |
3083 | ||
3084 | int | |
3085 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
3086 | { | |
b647c35f JL |
3087 | struct rb_root *root = &cifs_sb->tlink_tree; |
3088 | struct rb_node *node; | |
3089 | struct tcon_link *tlink; | |
50c2f753 | 3090 | char *tmp; |
9d002df4 | 3091 | |
2de970ff JL |
3092 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3093 | ||
b647c35f JL |
3094 | spin_lock(&cifs_sb->tlink_tree_lock); |
3095 | while ((node = rb_first(root))) { | |
3096 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3097 | cifs_get_tlink(tlink); | |
3098 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3099 | rb_erase(node, root); | |
1da177e4 | 3100 | |
b647c35f JL |
3101 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3102 | cifs_put_tlink(tlink); | |
3103 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3104 | } | |
3105 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3106 | |
2fe87f02 SF |
3107 | tmp = cifs_sb->prepath; |
3108 | cifs_sb->prepathlen = 0; | |
3109 | cifs_sb->prepath = NULL; | |
3110 | kfree(tmp); | |
1da177e4 | 3111 | |
9d002df4 | 3112 | return 0; |
50c2f753 | 3113 | } |
1da177e4 | 3114 | |
198b5682 | 3115 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
3116 | { |
3117 | int rc = 0; | |
198b5682 | 3118 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3119 | |
198b5682 JL |
3120 | /* only send once per connect */ |
3121 | if (server->maxBuf != 0) | |
3122 | return 0; | |
3123 | ||
3124 | rc = CIFSSMBNegotiate(xid, ses); | |
3125 | if (rc == -EAGAIN) { | |
3126 | /* retry only once on 1st time connection */ | |
3127 | rc = CIFSSMBNegotiate(xid, ses); | |
3128 | if (rc == -EAGAIN) | |
3129 | rc = -EHOSTDOWN; | |
1da177e4 | 3130 | } |
198b5682 JL |
3131 | if (rc == 0) { |
3132 | spin_lock(&GlobalMid_Lock); | |
3133 | if (server->tcpStatus != CifsExiting) | |
3134 | server->tcpStatus = CifsGood; | |
3135 | else | |
3136 | rc = -EHOSTDOWN; | |
3137 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3138 | |
198b5682 JL |
3139 | } |
3140 | ||
3141 | return rc; | |
3142 | } | |
3143 | ||
3144 | ||
3145 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
3146 | struct nls_table *nls_info) | |
3147 | { | |
3148 | int rc = 0; | |
3149 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3150 | |
198b5682 JL |
3151 | ses->flags = 0; |
3152 | ses->capabilities = server->capabilities; | |
26b994fa | 3153 | if (linuxExtEnabled == 0) |
198b5682 | 3154 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3155 | |
b6b38f70 JP |
3156 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
3157 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 3158 | |
198b5682 | 3159 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3160 | if (rc) { |
b6b38f70 | 3161 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3162 | } else { |
5d0d2882 SP |
3163 | mutex_lock(&ses->server->srv_mutex); |
3164 | if (!server->session_estab) { | |
21e73393 | 3165 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3166 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3167 | server->sequence_number = 0x2; |
3168 | server->session_estab = true; | |
3169 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3170 | } |
3171 | mutex_unlock(&server->srv_mutex); | |
3172 | ||
b6b38f70 | 3173 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3174 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3175 | ses->status = CifsGood; |
3176 | ses->need_reconnect = false; | |
20418acd | 3177 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3178 | } |
26b994fa | 3179 | |
21e73393 SP |
3180 | kfree(ses->auth_key.response); |
3181 | ses->auth_key.response = NULL; | |
3182 | ses->auth_key.len = 0; | |
d3686d54 SP |
3183 | kfree(ses->ntlmssp); |
3184 | ses->ntlmssp = NULL; | |
21e73393 | 3185 | |
1da177e4 LT |
3186 | return rc; |
3187 | } | |
3188 | ||
d2445556 | 3189 | static struct cifsTconInfo * |
9d002df4 JL |
3190 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3191 | { | |
3192 | struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb); | |
3193 | struct cifsSesInfo *ses; | |
3194 | struct cifsTconInfo *tcon = NULL; | |
3195 | struct smb_vol *vol_info; | |
3196 | char username[MAX_USERNAME_SIZE + 1]; | |
3197 | ||
3198 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3199 | if (vol_info == NULL) { | |
3200 | tcon = ERR_PTR(-ENOMEM); | |
3201 | goto out; | |
3202 | } | |
3203 | ||
3204 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3205 | vol_info->username = username; | |
3206 | vol_info->local_nls = cifs_sb->local_nls; | |
3207 | vol_info->linux_uid = fsuid; | |
3208 | vol_info->cred_uid = fsuid; | |
3209 | vol_info->UNC = master_tcon->treeName; | |
3210 | vol_info->retry = master_tcon->retry; | |
3211 | vol_info->nocase = master_tcon->nocase; | |
3212 | vol_info->local_lease = master_tcon->local_lease; | |
3213 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3214 | ||
3215 | /* FIXME: allow for other secFlg settings */ | |
3216 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3217 | ||
3218 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3219 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3220 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3221 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3222 | |
3223 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3224 | if (IS_ERR(ses)) { | |
3225 | tcon = (struct cifsTconInfo *)ses; | |
3226 | cifs_put_tcp_session(master_tcon->ses->server); | |
3227 | goto out; | |
3228 | } | |
3229 | ||
3230 | tcon = cifs_get_tcon(ses, vol_info); | |
3231 | if (IS_ERR(tcon)) { | |
3232 | cifs_put_smb_ses(ses); | |
3233 | goto out; | |
3234 | } | |
3235 | ||
3236 | if (ses->capabilities & CAP_UNIX) | |
3237 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3238 | out: | |
3239 | kfree(vol_info); | |
3240 | ||
3241 | return tcon; | |
3242 | } | |
3243 | ||
413e661c | 3244 | static inline struct tcon_link * |
9d002df4 JL |
3245 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3246 | { | |
413e661c | 3247 | return cifs_sb->master_tlink; |
9d002df4 JL |
3248 | } |
3249 | ||
3250 | struct cifsTconInfo * | |
3251 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) | |
3252 | { | |
3253 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3254 | } | |
3255 | ||
3256 | static int | |
3257 | cifs_sb_tcon_pending_wait(void *unused) | |
3258 | { | |
3259 | schedule(); | |
3260 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3261 | } | |
3262 | ||
b647c35f JL |
3263 | /* find and return a tlink with given uid */ |
3264 | static struct tcon_link * | |
3265 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3266 | { | |
3267 | struct rb_node *node = root->rb_node; | |
3268 | struct tcon_link *tlink; | |
3269 | ||
3270 | while (node) { | |
3271 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3272 | ||
3273 | if (tlink->tl_uid > uid) | |
3274 | node = node->rb_left; | |
3275 | else if (tlink->tl_uid < uid) | |
3276 | node = node->rb_right; | |
3277 | else | |
3278 | return tlink; | |
3279 | } | |
3280 | return NULL; | |
3281 | } | |
3282 | ||
3283 | /* insert a tcon_link into the tree */ | |
3284 | static void | |
3285 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3286 | { | |
3287 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3288 | struct tcon_link *tlink; | |
3289 | ||
3290 | while (*new) { | |
3291 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3292 | parent = *new; | |
3293 | ||
3294 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3295 | new = &((*new)->rb_left); | |
3296 | else | |
3297 | new = &((*new)->rb_right); | |
3298 | } | |
3299 | ||
3300 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3301 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3302 | } | |
3303 | ||
9d002df4 JL |
3304 | /* |
3305 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3306 | * current task. | |
3307 | * | |
3308 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3309 | * the master tcon for the mount. | |
3310 | * | |
6ef933a3 | 3311 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3312 | * exists, then check to see if it's pending construction. If it is then wait |
3313 | * for construction to complete. Once it's no longer pending, check to see if | |
3314 | * it failed and either return an error or retry construction, depending on | |
3315 | * the timeout. | |
3316 | * | |
3317 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3318 | * try to construct a new one. | |
3319 | */ | |
3320 | struct tcon_link * | |
3321 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3322 | { | |
3323 | int ret; | |
b647c35f | 3324 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3325 | struct tcon_link *tlink, *newtlink; |
3326 | ||
3327 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3328 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3329 | ||
3330 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3331 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3332 | if (tlink) |
3333 | cifs_get_tlink(tlink); | |
3334 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3335 | ||
3336 | if (tlink == NULL) { | |
3337 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3338 | if (newtlink == NULL) | |
3339 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3340 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3341 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3342 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3343 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3344 | cifs_get_tlink(newtlink); | |
3345 | ||
9d002df4 JL |
3346 | spin_lock(&cifs_sb->tlink_tree_lock); |
3347 | /* was one inserted after previous search? */ | |
b647c35f | 3348 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3349 | if (tlink) { |
3350 | cifs_get_tlink(tlink); | |
3351 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3352 | kfree(newtlink); |
3353 | goto wait_for_construction; | |
3354 | } | |
9d002df4 | 3355 | tlink = newtlink; |
b647c35f JL |
3356 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3357 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3358 | } else { |
3359 | wait_for_construction: | |
3360 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3361 | cifs_sb_tcon_pending_wait, | |
3362 | TASK_INTERRUPTIBLE); | |
3363 | if (ret) { | |
3364 | cifs_put_tlink(tlink); | |
3365 | return ERR_PTR(ret); | |
3366 | } | |
3367 | ||
3368 | /* if it's good, return it */ | |
3369 | if (!IS_ERR(tlink->tl_tcon)) | |
3370 | return tlink; | |
3371 | ||
3372 | /* return error if we tried this already recently */ | |
3373 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3374 | cifs_put_tlink(tlink); | |
3375 | return ERR_PTR(-EACCES); | |
3376 | } | |
3377 | ||
3378 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3379 | goto wait_for_construction; | |
3380 | } | |
3381 | ||
3382 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3383 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3384 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3385 | ||
3386 | if (IS_ERR(tlink->tl_tcon)) { | |
3387 | cifs_put_tlink(tlink); | |
3388 | return ERR_PTR(-EACCES); | |
3389 | } | |
3390 | ||
3391 | return tlink; | |
3392 | } | |
2de970ff JL |
3393 | |
3394 | /* | |
3395 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3396 | * out tcons. | |
3397 | */ | |
3398 | static void | |
3399 | cifs_prune_tlinks(struct work_struct *work) | |
3400 | { | |
3401 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3402 | prune_tlinks.work); | |
b647c35f JL |
3403 | struct rb_root *root = &cifs_sb->tlink_tree; |
3404 | struct rb_node *node = rb_first(root); | |
3405 | struct rb_node *tmp; | |
3406 | struct tcon_link *tlink; | |
2de970ff | 3407 | |
b647c35f JL |
3408 | /* |
3409 | * Because we drop the spinlock in the loop in order to put the tlink | |
3410 | * it's not guarded against removal of links from the tree. The only | |
3411 | * places that remove entries from the tree are this function and | |
3412 | * umounts. Because this function is non-reentrant and is canceled | |
3413 | * before umount can proceed, this is safe. | |
3414 | */ | |
3415 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3416 | node = rb_first(root); | |
3417 | while (node != NULL) { | |
3418 | tmp = node; | |
3419 | node = rb_next(tmp); | |
3420 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3421 | ||
3422 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3423 | atomic_read(&tlink->tl_count) != 0 || | |
3424 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3425 | continue; | |
2de970ff | 3426 | |
b647c35f JL |
3427 | cifs_get_tlink(tlink); |
3428 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3429 | rb_erase(tmp, root); | |
3430 | ||
3431 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3432 | cifs_put_tlink(tlink); | |
3433 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3434 | } | |
3435 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3436 | |
3437 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3438 | TLINK_IDLE_EXPIRE); | |
3439 | } |