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 | ||
c74093b6 JL |
55 | /* SMB echo "timeout" -- FIXME: tunable? */ |
56 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
57 | ||
1da177e4 LT |
58 | extern mempool_t *cifs_req_poolp; |
59 | ||
2de970ff | 60 | /* FIXME: should these be tunable? */ |
9d002df4 | 61 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 62 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 63 | |
a9f1b85e PS |
64 | static int ip_connect(struct TCP_Server_Info *server); |
65 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 66 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 67 | static void cifs_prune_tlinks(struct work_struct *work); |
1da177e4 | 68 | |
d5c5605c JL |
69 | /* |
70 | * cifs tcp session reconnection | |
71 | * | |
72 | * mark tcp session as reconnecting so temporarily locked | |
73 | * mark all smb sessions as reconnecting for tcp session | |
74 | * reconnect tcp session | |
75 | * wake up waiters on reconnection? - (not needed currently) | |
76 | */ | |
2cd646a2 | 77 | static int |
1da177e4 LT |
78 | cifs_reconnect(struct TCP_Server_Info *server) |
79 | { | |
80 | int rc = 0; | |
f1987b44 | 81 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
82 | struct cifs_ses *ses; |
83 | struct cifs_tcon *tcon; | |
fb8c4b14 | 84 | struct mid_q_entry *mid_entry; |
3c1105df | 85 | struct list_head retry_list; |
50c2f753 | 86 | |
1da177e4 | 87 | spin_lock(&GlobalMid_Lock); |
469ee614 | 88 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 89 | /* the demux thread will exit normally |
1da177e4 LT |
90 | next time through the loop */ |
91 | spin_unlock(&GlobalMid_Lock); | |
92 | return rc; | |
93 | } else | |
94 | server->tcpStatus = CifsNeedReconnect; | |
95 | spin_unlock(&GlobalMid_Lock); | |
96 | server->maxBuf = 0; | |
97 | ||
b6b38f70 | 98 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
99 | |
100 | /* before reconnecting the tcp session, mark the smb session (uid) | |
101 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 102 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 103 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 104 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 105 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
106 | ses->need_reconnect = true; |
107 | ses->ipc_tid = 0; | |
f1987b44 | 108 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 109 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 110 | tcon->need_reconnect = true; |
1da177e4 | 111 | } |
1da177e4 | 112 | } |
3f9bcca7 | 113 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 114 | |
1da177e4 | 115 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 116 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 117 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 118 | if (server->ssocket) { |
b6b38f70 JP |
119 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
120 | server->ssocket->flags); | |
91cf45f0 | 121 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 122 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 123 | server->ssocket->state, |
b6b38f70 | 124 | server->ssocket->flags); |
1da177e4 LT |
125 | sock_release(server->ssocket); |
126 | server->ssocket = NULL; | |
127 | } | |
5d0d2882 SP |
128 | server->sequence_number = 0; |
129 | server->session_estab = false; | |
21e73393 SP |
130 | kfree(server->session_key.response); |
131 | server->session_key.response = NULL; | |
132 | server->session_key.len = 0; | |
fda35943 | 133 | server->lstrp = jiffies; |
2b84a36c | 134 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 135 | |
2b84a36c | 136 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
137 | INIT_LIST_HEAD(&retry_list); |
138 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 139 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
140 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
141 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
142 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) | |
ad8b15f0 | 143 | mid_entry->midState = MID_RETRY_NEEDED; |
3c1105df JL |
144 | list_move(&mid_entry->qhead, &retry_list); |
145 | } | |
146 | spin_unlock(&GlobalMid_Lock); | |
147 | ||
148 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
149 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
150 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
151 | list_del_init(&mid_entry->qhead); |
152 | mid_entry->callback(mid_entry); | |
1da177e4 | 153 | } |
1da177e4 | 154 | |
7fdbaa1b | 155 | do { |
6c3d8909 | 156 | try_to_freeze(); |
a9f1b85e PS |
157 | |
158 | /* we should try only the port we connected to before */ | |
159 | rc = generic_ip_connect(server); | |
fb8c4b14 | 160 | if (rc) { |
b6b38f70 | 161 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 162 | msleep(3000); |
1da177e4 LT |
163 | } else { |
164 | atomic_inc(&tcpSesReconnectCount); | |
165 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 166 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 167 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 168 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 169 | } |
7fdbaa1b | 170 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 171 | |
1da177e4 LT |
172 | return rc; |
173 | } | |
174 | ||
fb8c4b14 | 175 | /* |
e4eb295d SF |
176 | return codes: |
177 | 0 not a transact2, or all data present | |
178 | >0 transact2 with that much data missing | |
179 | -EINVAL = invalid transact2 | |
180 | ||
181 | */ | |
fb8c4b14 | 182 | static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) |
e4eb295d | 183 | { |
fb8c4b14 | 184 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 185 | int remaining; |
26ec2548 | 186 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 187 | |
fb8c4b14 | 188 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
189 | return 0; |
190 | ||
fb8c4b14 SF |
191 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
192 | /* check for parm and data offset going beyond end of smb */ | |
193 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 194 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
195 | return -EINVAL; |
196 | } | |
197 | ||
198 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
199 | ||
26ec2548 JL |
200 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
201 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 202 | |
c0c7b905 | 203 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 204 | return 0; |
c0c7b905 | 205 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
206 | cFYI(1, "total data %d smaller than data in frame %d", |
207 | total_data_size, data_in_this_rsp); | |
e4eb295d | 208 | return -EINVAL; |
e4eb295d | 209 | } |
c0c7b905 JL |
210 | |
211 | remaining = total_data_size - data_in_this_rsp; | |
212 | ||
213 | cFYI(1, "missing %d bytes from transact2, check next response", | |
214 | remaining); | |
215 | if (total_data_size > maxBufSize) { | |
216 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", | |
217 | total_data_size, maxBufSize); | |
218 | return -EINVAL; | |
219 | } | |
220 | return remaining; | |
e4eb295d SF |
221 | } |
222 | ||
fb8c4b14 | 223 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
224 | { |
225 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
226 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
fb8c4b14 SF |
227 | char *data_area_of_target; |
228 | char *data_area_of_buf2; | |
26ec2548 | 229 | int remaining; |
2a2047bc JL |
230 | unsigned int byte_count, total_in_buf; |
231 | __u16 total_data_size, total_in_buf2; | |
e4eb295d | 232 | |
26ec2548 | 233 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
e4eb295d | 234 | |
26ec2548 JL |
235 | if (total_data_size != |
236 | get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount)) | |
b6b38f70 | 237 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d | 238 | |
26ec2548 | 239 | total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d SF |
240 | |
241 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 242 | |
fb8c4b14 | 243 | if (remaining < 0) |
2a2047bc | 244 | return -EPROTO; |
e4eb295d | 245 | |
fb8c4b14 | 246 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 247 | return 0; |
50c2f753 | 248 | |
26ec2548 | 249 | total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 250 | if (remaining < total_in_buf2) { |
b6b38f70 | 251 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
252 | } |
253 | ||
254 | /* find end of first SMB data area */ | |
fb8c4b14 | 255 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 256 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d SF |
257 | /* validate target area */ |
258 | ||
26ec2548 JL |
259 | data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol + |
260 | get_unaligned_le16(&pSMB2->t2_rsp.DataOffset); | |
e4eb295d SF |
261 | |
262 | data_area_of_target += total_in_buf; | |
263 | ||
264 | /* copy second buffer into end of first buffer */ | |
e4eb295d | 265 | total_in_buf += total_in_buf2; |
2a2047bc JL |
266 | /* is the result too big for the field? */ |
267 | if (total_in_buf > USHRT_MAX) | |
268 | return -EPROTO; | |
26ec2548 | 269 | put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); |
2a2047bc JL |
270 | |
271 | /* fix up the BCC */ | |
820a803f | 272 | byte_count = get_bcc(pTargetSMB); |
e4eb295d | 273 | byte_count += total_in_buf2; |
2a2047bc JL |
274 | /* is the result too big for the field? */ |
275 | if (byte_count > USHRT_MAX) | |
276 | return -EPROTO; | |
820a803f | 277 | put_bcc(byte_count, pTargetSMB); |
e4eb295d | 278 | |
be8e3b00 | 279 | byte_count = be32_to_cpu(pTargetSMB->smb_buf_length); |
e4eb295d | 280 | byte_count += total_in_buf2; |
2a2047bc JL |
281 | /* don't allow buffer to overflow */ |
282 | if (byte_count > CIFSMaxBufSize) | |
283 | return -ENOBUFS; | |
be8e3b00 | 284 | pTargetSMB->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 285 | |
2a2047bc JL |
286 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
287 | ||
fb8c4b14 | 288 | if (remaining == total_in_buf2) { |
b6b38f70 | 289 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
290 | return 0; /* we are done */ |
291 | } else /* more responses to go */ | |
292 | return 1; | |
e4eb295d SF |
293 | } |
294 | ||
c74093b6 JL |
295 | static void |
296 | cifs_echo_request(struct work_struct *work) | |
297 | { | |
298 | int rc; | |
299 | struct TCP_Server_Info *server = container_of(work, | |
300 | struct TCP_Server_Info, echo.work); | |
301 | ||
247ec9b4 | 302 | /* |
195291e6 JL |
303 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
304 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
305 | * we got a response recently | |
247ec9b4 | 306 | */ |
195291e6 | 307 | if (server->maxBuf == 0 || |
247ec9b4 | 308 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
309 | goto requeue_echo; |
310 | ||
311 | rc = CIFSSMBEcho(server); | |
312 | if (rc) | |
313 | cFYI(1, "Unable to send echo request to server: %s", | |
314 | server->hostname); | |
315 | ||
316 | requeue_echo: | |
317 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
318 | } | |
319 | ||
1da177e4 LT |
320 | static int |
321 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
322 | { | |
323 | int length; | |
324 | unsigned int pdu_length, total_read; | |
325 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
326 | struct smb_hdr *bigbuf = NULL; |
327 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
328 | struct msghdr smb_msg; |
329 | struct kvec iov; | |
330 | struct socket *csocket = server->ssocket; | |
2b84a36c | 331 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
332 | struct task_struct *task_to_wake = NULL; |
333 | struct mid_q_entry *mid_entry; | |
70ca734a | 334 | char temp; |
4b18f2a9 SF |
335 | bool isLargeBuf = false; |
336 | bool isMultiRsp; | |
e4eb295d | 337 | int reconnect; |
1da177e4 | 338 | |
1da177e4 | 339 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 340 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
341 | |
342 | length = atomic_inc_return(&tcpSesAllocCount); | |
343 | if (length > 1) | |
26f57364 SF |
344 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
345 | GFP_KERNEL); | |
1da177e4 | 346 | |
83144186 | 347 | set_freezable(); |
469ee614 | 348 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
349 | if (try_to_freeze()) |
350 | continue; | |
b8643e1b SF |
351 | if (bigbuf == NULL) { |
352 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 353 | if (!bigbuf) { |
b6b38f70 | 354 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
355 | msleep(3000); |
356 | /* retry will check if exiting */ | |
357 | continue; | |
358 | } | |
0fd1ffe0 PM |
359 | } else if (isLargeBuf) { |
360 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 361 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 362 | } |
b8643e1b SF |
363 | |
364 | if (smallbuf == NULL) { | |
365 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 366 | if (!smallbuf) { |
b6b38f70 | 367 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
368 | msleep(1000); |
369 | /* retry will check if exiting */ | |
370 | continue; | |
371 | } | |
372 | /* beginning of smb buffer is cleared in our buf_get */ | |
373 | } else /* if existing small buf clear beginning */ | |
26f57364 | 374 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 375 | |
4b18f2a9 SF |
376 | isLargeBuf = false; |
377 | isMultiRsp = false; | |
b8643e1b | 378 | smb_buffer = smallbuf; |
1da177e4 LT |
379 | iov.iov_base = smb_buffer; |
380 | iov.iov_len = 4; | |
381 | smb_msg.msg_control = NULL; | |
382 | smb_msg.msg_controllen = 0; | |
f01d5e14 | 383 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 384 | |
f01d5e14 | 385 | incomplete_rcv: |
fd88ce93 | 386 | if (echo_retries > 0 && server->tcpStatus == CifsGood && |
fda35943 SF |
387 | time_after(jiffies, server->lstrp + |
388 | (echo_retries * SMB_ECHO_INTERVAL))) { | |
389 | cERROR(1, "Server %s has not responded in %d seconds. " | |
390 | "Reconnecting...", server->hostname, | |
391 | (echo_retries * SMB_ECHO_INTERVAL / HZ)); | |
392 | cifs_reconnect(server); | |
393 | csocket = server->ssocket; | |
394 | wake_up(&server->response_q); | |
395 | continue; | |
396 | } | |
397 | ||
1da177e4 LT |
398 | length = |
399 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 400 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 401 | |
469ee614 | 402 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
403 | break; |
404 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 405 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 406 | cifs_reconnect(server); |
b6b38f70 | 407 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
408 | csocket = server->ssocket; |
409 | continue; | |
522bbe65 JL |
410 | } else if (length == -ERESTARTSYS || |
411 | length == -EAGAIN || | |
412 | length == -EINTR) { | |
b8643e1b | 413 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
414 | allowing socket to clear and app threads to set |
415 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
416 | if (pdu_length < 4) { |
417 | iov.iov_base = (4 - pdu_length) + | |
418 | (char *)smb_buffer; | |
419 | iov.iov_len = pdu_length; | |
420 | smb_msg.msg_control = NULL; | |
421 | smb_msg.msg_controllen = 0; | |
c18c732e | 422 | goto incomplete_rcv; |
c527c8a7 | 423 | } else |
c18c732e | 424 | continue; |
1da177e4 | 425 | } else if (length <= 0) { |
b6b38f70 JP |
426 | cFYI(1, "Reconnect after unexpected peek error %d", |
427 | length); | |
1da177e4 LT |
428 | cifs_reconnect(server); |
429 | csocket = server->ssocket; | |
430 | wake_up(&server->response_q); | |
431 | continue; | |
2a974680 | 432 | } else if (length < pdu_length) { |
b6b38f70 JP |
433 | cFYI(1, "requested %d bytes but only got %d bytes", |
434 | pdu_length, length); | |
f01d5e14 | 435 | pdu_length -= length; |
f01d5e14 SF |
436 | msleep(1); |
437 | goto incomplete_rcv; | |
46810cbf | 438 | } |
1da177e4 | 439 | |
70ca734a SF |
440 | /* The right amount was read from socket - 4 bytes */ |
441 | /* so we can now interpret the length field */ | |
46810cbf | 442 | |
70ca734a SF |
443 | /* the first byte big endian of the length field, |
444 | is actually not part of the length but the type | |
445 | with the most common, zero, as regular data */ | |
446 | temp = *((char *) smb_buffer); | |
46810cbf | 447 | |
fb8c4b14 | 448 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
449 | but we convert it here so it is always manipulated |
450 | as host byte order */ | |
be8e3b00 | 451 | pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
70ca734a | 452 | |
b6b38f70 | 453 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 454 | |
70ca734a | 455 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 456 | continue; |
70ca734a | 457 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 458 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 459 | continue; |
70ca734a | 460 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 461 | /* we get this from Windows 98 instead of |
46810cbf | 462 | an error on SMB negprot response */ |
b6b38f70 JP |
463 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
464 | pdu_length); | |
7332f2a6 JL |
465 | /* give server a second to clean up */ |
466 | msleep(1000); | |
467 | /* always try 445 first on reconnect since we get NACK | |
468 | * on some if we ever connected to port 139 (the NACK | |
469 | * is since we do not begin with RFC1001 session | |
470 | * initialize frame) | |
471 | */ | |
32670396 | 472 | cifs_set_port((struct sockaddr *) |
a9f1b85e | 473 | &server->dstaddr, CIFS_PORT); |
7332f2a6 JL |
474 | cifs_reconnect(server); |
475 | csocket = server->ssocket; | |
476 | wake_up(&server->response_q); | |
477 | continue; | |
70ca734a | 478 | } else if (temp != (char) 0) { |
b6b38f70 | 479 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
480 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
481 | length); | |
46810cbf SF |
482 | cifs_reconnect(server); |
483 | csocket = server->ssocket; | |
484 | continue; | |
e4eb295d SF |
485 | } |
486 | ||
487 | /* else we have an SMB response */ | |
fb8c4b14 | 488 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 489 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
490 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
491 | length, pdu_length+4); | |
e4eb295d SF |
492 | cifs_reconnect(server); |
493 | csocket = server->ssocket; | |
494 | wake_up(&server->response_q); | |
495 | continue; | |
fb8c4b14 | 496 | } |
e4eb295d SF |
497 | |
498 | /* else length ok */ | |
499 | reconnect = 0; | |
500 | ||
fb8c4b14 | 501 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 502 | isLargeBuf = true; |
e4eb295d SF |
503 | memcpy(bigbuf, smallbuf, 4); |
504 | smb_buffer = bigbuf; | |
505 | } | |
506 | length = 0; | |
507 | iov.iov_base = 4 + (char *)smb_buffer; | |
508 | iov.iov_len = pdu_length; | |
fb8c4b14 | 509 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
510 | total_read += length) { |
511 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
512 | pdu_length - total_read, 0); | |
522bbe65 | 513 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
514 | /* then will exit */ |
515 | reconnect = 2; | |
516 | break; | |
517 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
518 | cifs_reconnect(server); |
519 | csocket = server->ssocket; | |
fb8c4b14 | 520 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
521 | /* Now we will reread sock */ |
522 | reconnect = 1; | |
523 | break; | |
522bbe65 JL |
524 | } else if (length == -ERESTARTSYS || |
525 | length == -EAGAIN || | |
526 | length == -EINTR) { | |
e4eb295d | 527 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 528 | allowing socket to clear and app |
e4eb295d SF |
529 | threads to set tcpStatus |
530 | CifsNeedReconnect if server hung*/ | |
c18c732e | 531 | length = 0; |
46810cbf | 532 | continue; |
e4eb295d | 533 | } else if (length <= 0) { |
b6b38f70 JP |
534 | cERROR(1, "Received no data, expecting %d", |
535 | pdu_length - total_read); | |
e4eb295d SF |
536 | cifs_reconnect(server); |
537 | csocket = server->ssocket; | |
538 | reconnect = 1; | |
539 | break; | |
46810cbf | 540 | } |
e4eb295d | 541 | } |
fb8c4b14 | 542 | if (reconnect == 2) |
e4eb295d | 543 | break; |
fb8c4b14 | 544 | else if (reconnect == 1) |
e4eb295d | 545 | continue; |
1da177e4 | 546 | |
9587fcff | 547 | total_read += 4; /* account for rfc1002 hdr */ |
50c2f753 | 548 | |
9587fcff | 549 | dump_smb(smb_buffer, total_read); |
71823baf JL |
550 | |
551 | /* | |
552 | * We know that we received enough to get to the MID as we | |
553 | * checked the pdu_length earlier. Now check to see | |
554 | * if the rest of the header is OK. We borrow the length | |
555 | * var for the rest of the loop to avoid a new stack var. | |
556 | * | |
557 | * 48 bytes is enough to display the header and a little bit | |
558 | * into the payload for debugging purposes. | |
559 | */ | |
560 | length = checkSMB(smb_buffer, smb_buffer->Mid, total_read); | |
561 | if (length != 0) | |
9587fcff | 562 | cifs_dump_mem("Bad SMB: ", smb_buffer, |
71823baf | 563 | min_t(unsigned int, total_read, 48)); |
1da177e4 | 564 | |
2b84a36c | 565 | mid_entry = NULL; |
fda35943 SF |
566 | server->lstrp = jiffies; |
567 | ||
e4eb295d | 568 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 569 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
e4eb295d SF |
570 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
571 | ||
146f9f65 JL |
572 | if (mid_entry->mid != smb_buffer->Mid || |
573 | mid_entry->midState != MID_REQUEST_SUBMITTED || | |
574 | mid_entry->command != smb_buffer->Command) { | |
575 | mid_entry = NULL; | |
576 | continue; | |
577 | } | |
578 | ||
579 | if (length == 0 && | |
580 | check2ndT2(smb_buffer, server->maxBuf) > 0) { | |
581 | /* We have a multipart transact2 resp */ | |
582 | isMultiRsp = true; | |
583 | if (mid_entry->resp_buf) { | |
584 | /* merge response - fix up 1st*/ | |
16541ba1 JL |
585 | length = coalesce_t2(smb_buffer, |
586 | mid_entry->resp_buf); | |
587 | if (length > 0) { | |
588 | length = 0; | |
146f9f65 JL |
589 | mid_entry->multiRsp = true; |
590 | break; | |
e4eb295d | 591 | } else { |
16541ba1 JL |
592 | /* all parts received or |
593 | * packet is malformed | |
594 | */ | |
146f9f65 JL |
595 | mid_entry->multiEnd = true; |
596 | goto multi_t2_fnd; | |
597 | } | |
598 | } else { | |
599 | if (!isLargeBuf) { | |
600 | /* | |
601 | * FIXME: switch to already | |
602 | * allocated largebuf? | |
603 | */ | |
604 | cERROR(1, "1st trans2 resp " | |
605 | "needs bigbuf"); | |
606 | } else { | |
607 | /* Have first buffer */ | |
608 | mid_entry->resp_buf = | |
609 | smb_buffer; | |
610 | mid_entry->largeBuf = true; | |
611 | bigbuf = NULL; | |
e4eb295d | 612 | } |
50c2f753 | 613 | } |
146f9f65 JL |
614 | break; |
615 | } | |
616 | mid_entry->resp_buf = smb_buffer; | |
617 | mid_entry->largeBuf = isLargeBuf; | |
e4eb295d | 618 | multi_t2_fnd: |
146f9f65 JL |
619 | if (length == 0) |
620 | mid_entry->midState = MID_RESPONSE_RECEIVED; | |
621 | else | |
622 | mid_entry->midState = MID_RESPONSE_MALFORMED; | |
1047abc1 | 623 | #ifdef CONFIG_CIFS_STATS2 |
146f9f65 | 624 | mid_entry->when_received = jiffies; |
1047abc1 | 625 | #endif |
146f9f65 | 626 | list_del_init(&mid_entry->qhead); |
146f9f65 | 627 | break; |
1da177e4 | 628 | } |
e4eb295d | 629 | spin_unlock(&GlobalMid_Lock); |
2b84a36c JL |
630 | |
631 | if (mid_entry != NULL) { | |
3c1105df | 632 | mid_entry->callback(mid_entry); |
cd63499c | 633 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 634 | if (!isMultiRsp) { |
cd63499c | 635 | /* smb buffer will be freed by user thread */ |
26f57364 | 636 | if (isLargeBuf) |
cd63499c | 637 | bigbuf = NULL; |
26f57364 | 638 | else |
cd63499c SF |
639 | smallbuf = NULL; |
640 | } | |
71823baf JL |
641 | } else if (length != 0) { |
642 | /* response sanity checks failed */ | |
643 | continue; | |
4b18f2a9 SF |
644 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
645 | !isMultiRsp) { | |
b6b38f70 | 646 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 647 | "NumMids %d", atomic_read(&midCount)); |
50c2f753 | 648 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 649 | sizeof(struct smb_hdr)); |
3979877e SF |
650 | #ifdef CONFIG_CIFS_DEBUG2 |
651 | cifs_dump_detail(smb_buffer); | |
652 | cifs_dump_mids(server); | |
653 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 654 | |
e4eb295d SF |
655 | } |
656 | } /* end while !EXITING */ | |
657 | ||
e7ddee90 | 658 | /* take it off the list, if it's not already */ |
3f9bcca7 | 659 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 660 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 661 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 662 | |
1da177e4 LT |
663 | spin_lock(&GlobalMid_Lock); |
664 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 665 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 666 | wake_up_all(&server->response_q); |
e691b9d1 | 667 | |
31ca3bc3 SF |
668 | /* check if we have blocked requests that need to free */ |
669 | /* Note that cifs_max_pending is normally 50, but | |
670 | can be set at module install time to as little as two */ | |
e691b9d1 | 671 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 672 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
673 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
674 | /* We do not want to set the max_pending too low or we | |
675 | could end up with the counter going negative */ | |
1da177e4 | 676 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 677 | /* Although there should not be any requests blocked on |
1da177e4 | 678 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 679 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
680 | to the same server - they now will see the session is in exit state |
681 | and get out of SendReceive. */ | |
682 | wake_up_all(&server->request_q); | |
683 | /* give those requests time to exit */ | |
b8643e1b | 684 | msleep(125); |
50c2f753 | 685 | |
fb8c4b14 | 686 | if (server->ssocket) { |
1da177e4 LT |
687 | sock_release(csocket); |
688 | server->ssocket = NULL; | |
689 | } | |
fd62cb7e | 690 | /* buffer usually freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
691 | cifs_buf_release(bigbuf); |
692 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 693 | cifs_small_buf_release(smallbuf); |
1da177e4 | 694 | |
9d78315b | 695 | if (!list_empty(&server->pending_mid_q)) { |
3c1105df JL |
696 | struct list_head dispose_list; |
697 | ||
698 | INIT_LIST_HEAD(&dispose_list); | |
1da177e4 | 699 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 700 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
9d78315b | 701 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
3c1105df JL |
702 | cFYI(1, "Clearing mid 0x%x", mid_entry->mid); |
703 | mid_entry->midState = MID_SHUTDOWN; | |
704 | list_move(&mid_entry->qhead, &dispose_list); | |
705 | } | |
706 | spin_unlock(&GlobalMid_Lock); | |
707 | ||
708 | /* now walk dispose list and issue callbacks */ | |
709 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
710 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
711 | cFYI(1, "Callback mid 0x%x", mid_entry->mid); | |
2b84a36c JL |
712 | list_del_init(&mid_entry->qhead); |
713 | mid_entry->callback(mid_entry); | |
1da177e4 | 714 | } |
1da177e4 | 715 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 716 | msleep(125); |
1da177e4 LT |
717 | } |
718 | ||
f191401f | 719 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 720 | /* mpx threads have not exited yet give them |
1da177e4 | 721 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
722 | /* due to delays on oplock break requests, we need |
723 | to wait at least 45 seconds before giving up | |
724 | on a request getting a response and going ahead | |
725 | and killing cifsd */ | |
b6b38f70 | 726 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 727 | msleep(46000); |
1da177e4 LT |
728 | /* if threads still have not exited they are probably never |
729 | coming home not much else we can do but free the memory */ | |
730 | } | |
1da177e4 | 731 | |
c359cf3c | 732 | kfree(server->hostname); |
b1c8d2b4 | 733 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 734 | kfree(server); |
93d0ec85 JL |
735 | |
736 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
737 | if (length > 0) |
738 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
739 | GFP_KERNEL); | |
50c2f753 | 740 | |
b1c8d2b4 JL |
741 | /* if server->tsk was NULL then wait for a signal before exiting */ |
742 | if (!task_to_wake) { | |
743 | set_current_state(TASK_INTERRUPTIBLE); | |
744 | while (!signal_pending(current)) { | |
745 | schedule(); | |
746 | set_current_state(TASK_INTERRUPTIBLE); | |
747 | } | |
748 | set_current_state(TASK_RUNNING); | |
749 | } | |
750 | ||
0468a2cf | 751 | module_put_and_exit(0); |
1da177e4 LT |
752 | } |
753 | ||
c359cf3c JL |
754 | /* extract the host portion of the UNC string */ |
755 | static char * | |
756 | extract_hostname(const char *unc) | |
757 | { | |
758 | const char *src; | |
759 | char *dst, *delim; | |
760 | unsigned int len; | |
761 | ||
762 | /* skip double chars at beginning of string */ | |
763 | /* BB: check validity of these bytes? */ | |
764 | src = unc + 2; | |
765 | ||
766 | /* delimiter between hostname and sharename is always '\\' now */ | |
767 | delim = strchr(src, '\\'); | |
768 | if (!delim) | |
769 | return ERR_PTR(-EINVAL); | |
770 | ||
771 | len = delim - src; | |
772 | dst = kmalloc((len + 1), GFP_KERNEL); | |
773 | if (dst == NULL) | |
774 | return ERR_PTR(-ENOMEM); | |
775 | ||
776 | memcpy(dst, src, len); | |
777 | dst[len] = '\0'; | |
778 | ||
779 | return dst; | |
780 | } | |
781 | ||
1da177e4 | 782 | static int |
b946845a | 783 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 784 | struct smb_vol *vol) |
1da177e4 | 785 | { |
4906e50b | 786 | char *value, *data, *end; |
957df453 | 787 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
788 | unsigned int temp_len, i, j; |
789 | char separator[2]; | |
9b9d6b24 JL |
790 | short int override_uid = -1; |
791 | short int override_gid = -1; | |
792 | bool uid_specified = false; | |
793 | bool gid_specified = false; | |
88463999 | 794 | char *nodename = utsname()->nodename; |
1da177e4 LT |
795 | |
796 | separator[0] = ','; | |
50c2f753 | 797 | separator[1] = 0; |
1da177e4 | 798 | |
88463999 JL |
799 | /* |
800 | * does not have to be perfect mapping since field is | |
801 | * informational, only used for servers that do not support | |
802 | * port 445 and it can be overridden at mount time | |
803 | */ | |
1397f2ee JL |
804 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
805 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
806 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
807 | ||
1397f2ee | 808 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
809 | /* null target name indicates to use *SMBSERVR default called name |
810 | if we end up sending RFC1001 session initialize */ | |
811 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
812 | vol->cred_uid = current_uid(); |
813 | vol->linux_uid = current_uid(); | |
a001e5b5 | 814 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
815 | |
816 | /* default to only allowing write access to owner of the mount */ | |
817 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
818 | |
819 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
820 | /* default is always to request posix paths. */ |
821 | vol->posix_paths = 1; | |
a0c9217f JL |
822 | /* default to using server inode numbers where available */ |
823 | vol->server_ino = 1; | |
ac67055e | 824 | |
6d20e840 SJ |
825 | vol->actimeo = CIFS_DEF_ACTIMEO; |
826 | ||
b946845a SF |
827 | if (!mountdata) |
828 | goto cifs_parse_mount_err; | |
829 | ||
830 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
831 | if (!mountdata_copy) | |
832 | goto cifs_parse_mount_err; | |
1da177e4 | 833 | |
b946845a | 834 | options = mountdata_copy; |
4906e50b | 835 | end = options + strlen(options); |
50c2f753 | 836 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 837 | if (options[4] != 0) { |
1da177e4 LT |
838 | separator[0] = options[4]; |
839 | options += 5; | |
840 | } else { | |
b6b38f70 | 841 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
842 | } |
843 | } | |
50c2f753 | 844 | |
1da177e4 LT |
845 | while ((data = strsep(&options, separator)) != NULL) { |
846 | if (!*data) | |
847 | continue; | |
848 | if ((value = strchr(data, '=')) != NULL) | |
849 | *value++ = '\0'; | |
850 | ||
50c2f753 SF |
851 | /* Have to parse this before we parse for "user" */ |
852 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 853 | vol->no_xattr = 0; |
50c2f753 | 854 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
855 | vol->no_xattr = 1; |
856 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 857 | if (!value) { |
1da177e4 LT |
858 | printk(KERN_WARNING |
859 | "CIFS: invalid or missing username\n"); | |
b946845a | 860 | goto cifs_parse_mount_err; |
fb8c4b14 | 861 | } else if (!*value) { |
4b952a9b SF |
862 | /* null user, ie anonymous, authentication */ |
863 | vol->nullauth = 1; | |
1da177e4 | 864 | } |
8727c8a8 SF |
865 | if (strnlen(value, MAX_USERNAME_SIZE) < |
866 | MAX_USERNAME_SIZE) { | |
b946845a SF |
867 | vol->username = kstrdup(value, GFP_KERNEL); |
868 | if (!vol->username) { | |
869 | printk(KERN_WARNING "CIFS: no memory " | |
870 | "for username\n"); | |
871 | goto cifs_parse_mount_err; | |
872 | } | |
1da177e4 LT |
873 | } else { |
874 | printk(KERN_WARNING "CIFS: username too long\n"); | |
b946845a | 875 | goto cifs_parse_mount_err; |
1da177e4 LT |
876 | } |
877 | } else if (strnicmp(data, "pass", 4) == 0) { | |
878 | if (!value) { | |
879 | vol->password = NULL; | |
880 | continue; | |
fb8c4b14 | 881 | } else if (value[0] == 0) { |
1da177e4 LT |
882 | /* check if string begins with double comma |
883 | since that would mean the password really | |
884 | does start with a comma, and would not | |
885 | indicate an empty string */ | |
fb8c4b14 | 886 | if (value[1] != separator[0]) { |
1da177e4 LT |
887 | vol->password = NULL; |
888 | continue; | |
889 | } | |
890 | } | |
891 | temp_len = strlen(value); | |
892 | /* removed password length check, NTLM passwords | |
893 | can be arbitrarily long */ | |
894 | ||
50c2f753 | 895 | /* if comma in password, the string will be |
1da177e4 LT |
896 | prematurely null terminated. Commas in password are |
897 | specified across the cifs mount interface by a double | |
898 | comma ie ,, and a comma used as in other cases ie ',' | |
899 | as a parameter delimiter/separator is single and due | |
900 | to the strsep above is temporarily zeroed. */ | |
901 | ||
902 | /* NB: password legally can have multiple commas and | |
903 | the only illegal character in a password is null */ | |
904 | ||
50c2f753 | 905 | if ((value[temp_len] == 0) && |
4906e50b | 906 | (value + temp_len < end) && |
09d1db5c | 907 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
908 | /* reinsert comma */ |
909 | value[temp_len] = separator[0]; | |
50c2f753 SF |
910 | temp_len += 2; /* move after second comma */ |
911 | while (value[temp_len] != 0) { | |
1da177e4 | 912 | if (value[temp_len] == separator[0]) { |
50c2f753 | 913 | if (value[temp_len+1] == |
09d1db5c SF |
914 | separator[0]) { |
915 | /* skip second comma */ | |
916 | temp_len++; | |
50c2f753 | 917 | } else { |
1da177e4 LT |
918 | /* single comma indicating start |
919 | of next parm */ | |
920 | break; | |
921 | } | |
922 | } | |
923 | temp_len++; | |
924 | } | |
fb8c4b14 | 925 | if (value[temp_len] == 0) { |
1da177e4 LT |
926 | options = NULL; |
927 | } else { | |
928 | value[temp_len] = 0; | |
929 | /* point option to start of next parm */ | |
930 | options = value + temp_len + 1; | |
931 | } | |
50c2f753 | 932 | /* go from value to value + temp_len condensing |
1da177e4 LT |
933 | double commas to singles. Note that this ends up |
934 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 935 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 936 | if (vol->password == NULL) { |
50c2f753 SF |
937 | printk(KERN_WARNING "CIFS: no memory " |
938 | "for password\n"); | |
b946845a | 939 | goto cifs_parse_mount_err; |
433dc24f | 940 | } |
50c2f753 | 941 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 942 | vol->password[j] = value[i]; |
fb8c4b14 | 943 | if (value[i] == separator[0] |
09d1db5c | 944 | && value[i+1] == separator[0]) { |
1da177e4 LT |
945 | /* skip second comma */ |
946 | i++; | |
947 | } | |
948 | } | |
949 | vol->password[j] = 0; | |
950 | } else { | |
e915fc49 | 951 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 952 | if (vol->password == NULL) { |
50c2f753 SF |
953 | printk(KERN_WARNING "CIFS: no memory " |
954 | "for password\n"); | |
b946845a | 955 | goto cifs_parse_mount_err; |
433dc24f | 956 | } |
1da177e4 LT |
957 | strcpy(vol->password, value); |
958 | } | |
58f7f68f JL |
959 | } else if (!strnicmp(data, "ip", 2) || |
960 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
961 | if (!value || !*value) { |
962 | vol->UNCip = NULL; | |
50b64e3b JL |
963 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
964 | INET6_ADDRSTRLEN) { | |
b946845a SF |
965 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
966 | if (!vol->UNCip) { | |
967 | printk(KERN_WARNING "CIFS: no memory " | |
968 | "for UNC IP\n"); | |
969 | goto cifs_parse_mount_err; | |
970 | } | |
1da177e4 | 971 | } else { |
50c2f753 SF |
972 | printk(KERN_WARNING "CIFS: ip address " |
973 | "too long\n"); | |
b946845a | 974 | goto cifs_parse_mount_err; |
1da177e4 | 975 | } |
50c2f753 SF |
976 | } else if (strnicmp(data, "sec", 3) == 0) { |
977 | if (!value || !*value) { | |
b6b38f70 | 978 | cERROR(1, "no security value specified"); |
50c2f753 SF |
979 | continue; |
980 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
981 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 982 | CIFSSEC_MUST_SIGN; |
bf820679 | 983 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
984 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
985 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 986 | cERROR(1, "Krb5 cifs privacy not supported"); |
b946845a | 987 | goto cifs_parse_mount_err; |
bf820679 | 988 | } else if (strnicmp(value, "krb5", 4) == 0) { |
750d1151 | 989 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
990 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
991 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
992 | CIFSSEC_MUST_SIGN; | |
993 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
994 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 995 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 996 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 997 | CIFSSEC_MUST_SIGN; |
bf820679 | 998 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 999 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1000 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1001 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1002 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1003 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1004 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1005 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1006 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1007 | /* BB is there a better way to do this? */ |
750d1151 | 1008 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1009 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1010 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1011 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1012 | #endif |
bf820679 | 1013 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1014 | vol->nullauth = 1; |
50c2f753 | 1015 | } else { |
b6b38f70 | 1016 | cERROR(1, "bad security option: %s", value); |
b946845a | 1017 | goto cifs_parse_mount_err; |
50c2f753 | 1018 | } |
1cb06d0b SF |
1019 | } else if (strnicmp(data, "vers", 3) == 0) { |
1020 | if (!value || !*value) { | |
1021 | cERROR(1, "no protocol version specified" | |
1022 | " after vers= mount option"); | |
1023 | } else if ((strnicmp(value, "cifs", 4) == 0) || | |
1024 | (strnicmp(value, "1", 1) == 0)) { | |
1025 | /* this is the default */ | |
1026 | continue; | |
1cb06d0b | 1027 | } |
1da177e4 LT |
1028 | } else if ((strnicmp(data, "unc", 3) == 0) |
1029 | || (strnicmp(data, "target", 6) == 0) | |
1030 | || (strnicmp(data, "path", 4) == 0)) { | |
1031 | if (!value || !*value) { | |
50c2f753 SF |
1032 | printk(KERN_WARNING "CIFS: invalid path to " |
1033 | "network resource\n"); | |
b946845a | 1034 | goto cifs_parse_mount_err; |
1da177e4 LT |
1035 | } |
1036 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1037 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1038 | if (vol->UNC == NULL) |
b946845a | 1039 | goto cifs_parse_mount_err; |
50c2f753 | 1040 | strcpy(vol->UNC, value); |
1da177e4 LT |
1041 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1042 | vol->UNC[0] = '\\'; | |
1043 | vol->UNC[1] = '\\'; | |
50c2f753 | 1044 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1045 | printk(KERN_WARNING |
50c2f753 SF |
1046 | "CIFS: UNC Path does not begin " |
1047 | "with // or \\\\ \n"); | |
b946845a | 1048 | goto cifs_parse_mount_err; |
1da177e4 LT |
1049 | } |
1050 | } else { | |
1051 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1052 | goto cifs_parse_mount_err; |
1da177e4 LT |
1053 | } |
1054 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1055 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1056 | if (!value || !*value) { | |
1057 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
b946845a | 1058 | goto cifs_parse_mount_err; |
1da177e4 LT |
1059 | } |
1060 | /* BB are there cases in which a comma can be valid in | |
1061 | a domain name and need special handling? */ | |
3979877e | 1062 | if (strnlen(value, 256) < 256) { |
b946845a SF |
1063 | vol->domainname = kstrdup(value, GFP_KERNEL); |
1064 | if (!vol->domainname) { | |
1065 | printk(KERN_WARNING "CIFS: no memory " | |
1066 | "for domainname\n"); | |
1067 | goto cifs_parse_mount_err; | |
1068 | } | |
b6b38f70 | 1069 | cFYI(1, "Domain name set"); |
1da177e4 | 1070 | } else { |
50c2f753 SF |
1071 | printk(KERN_WARNING "CIFS: domain name too " |
1072 | "long\n"); | |
b946845a | 1073 | goto cifs_parse_mount_err; |
1da177e4 | 1074 | } |
3eb9a889 BG |
1075 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1076 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1077 | ||
1078 | if (!value || !*value) { | |
1079 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1080 | " not specified.\n"); | |
b946845a | 1081 | goto cifs_parse_mount_err; |
3eb9a889 BG |
1082 | } |
1083 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1084 | value, strlen(value)); | |
b235f371 | 1085 | if (i == 0) { |
3eb9a889 BG |
1086 | printk(KERN_WARNING "CIFS: Could not parse" |
1087 | " srcaddr: %s\n", | |
1088 | value); | |
b946845a | 1089 | goto cifs_parse_mount_err; |
3eb9a889 | 1090 | } |
50c2f753 SF |
1091 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1092 | if (!value || !*value) { | |
1093 | printk(KERN_WARNING | |
1094 | "CIFS: invalid path prefix\n"); | |
b946845a | 1095 | goto cifs_parse_mount_err; |
50c2f753 SF |
1096 | } |
1097 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1098 | if (value[0] != '/') |
2fe87f02 | 1099 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1100 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1101 | if (vol->prepath == NULL) | |
b946845a | 1102 | goto cifs_parse_mount_err; |
4523cc30 | 1103 | if (value[0] != '/') { |
2fe87f02 | 1104 | vol->prepath[0] = '/'; |
50c2f753 | 1105 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1106 | } else |
50c2f753 | 1107 | strcpy(vol->prepath, value); |
b6b38f70 | 1108 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1109 | } else { |
1110 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
b946845a | 1111 | goto cifs_parse_mount_err; |
50c2f753 | 1112 | } |
1da177e4 LT |
1113 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1114 | if (!value || !*value) { | |
63135e08 SF |
1115 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1116 | "specified\n"); | |
b946845a | 1117 | goto cifs_parse_mount_err; |
1da177e4 LT |
1118 | } |
1119 | if (strnlen(value, 65) < 65) { | |
b946845a SF |
1120 | if (strnicmp(value, "default", 7)) { |
1121 | vol->iocharset = kstrdup(value, | |
1122 | GFP_KERNEL); | |
1123 | ||
1124 | if (!vol->iocharset) { | |
1125 | printk(KERN_WARNING "CIFS: no " | |
1126 | "memory for" | |
1127 | "charset\n"); | |
1128 | goto cifs_parse_mount_err; | |
1129 | } | |
1130 | } | |
50c2f753 SF |
1131 | /* if iocharset not set then load_nls_default |
1132 | is used by caller */ | |
b6b38f70 | 1133 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1134 | } else { |
63135e08 SF |
1135 | printk(KERN_WARNING "CIFS: iocharset name " |
1136 | "too long.\n"); | |
b946845a | 1137 | goto cifs_parse_mount_err; |
1da177e4 | 1138 | } |
9b9d6b24 JL |
1139 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1140 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1141 | uid_specified = true; | |
bd763319 JL |
1142 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1143 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1144 | } else if (!strnicmp(data, "forceuid", 8)) { |
1145 | override_uid = 1; | |
1146 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1147 | override_uid = 0; | |
1148 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1149 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1150 | gid_specified = true; | |
1151 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1152 | override_gid = 1; | |
1153 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1154 | override_gid = 0; | |
1da177e4 LT |
1155 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1156 | if (value && *value) { | |
1157 | vol->file_mode = | |
1158 | simple_strtoul(value, &value, 0); | |
1159 | } | |
1160 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1161 | if (value && *value) { | |
1162 | vol->dir_mode = | |
1163 | simple_strtoul(value, &value, 0); | |
1164 | } | |
1165 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1166 | if (value && *value) { | |
1167 | vol->dir_mode = | |
1168 | simple_strtoul(value, &value, 0); | |
1169 | } | |
1170 | } else if (strnicmp(data, "port", 4) == 0) { | |
1171 | if (value && *value) { | |
1172 | vol->port = | |
1173 | simple_strtoul(value, &value, 0); | |
1174 | } | |
1175 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1176 | if (value && *value) { | |
1177 | vol->rsize = | |
1178 | simple_strtoul(value, &value, 0); | |
1179 | } | |
1180 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1181 | if (value && *value) { | |
1182 | vol->wsize = | |
1183 | simple_strtoul(value, &value, 0); | |
1184 | } | |
1185 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1186 | if (!value || !*value) { |
b6b38f70 | 1187 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1188 | continue; |
1189 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1190 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1191 | } |
1192 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1193 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1194 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1195 | } else { |
1397f2ee JL |
1196 | memset(vol->source_rfc1001_name, 0x20, |
1197 | RFC1001_NAME_LEN); | |
1198 | /* | |
1199 | * FIXME: are there cases in which a comma can | |
1200 | * be valid in workstation netbios name (and | |
1201 | * need special handling)? | |
1202 | */ | |
1203 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1204 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1205 | if (value[i] == 0) |
1da177e4 | 1206 | break; |
1397f2ee | 1207 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1208 | } |
1209 | /* The string has 16th byte zero still from | |
1210 | set at top of the function */ | |
1397f2ee | 1211 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1212 | printk(KERN_WARNING "CIFS: netbiosname" |
1213 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1214 | } |
1215 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1216 | /* servernetbiosname specified override *SMBSERVER */ | |
1217 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1218 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1219 | } else { |
1220 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1221 | memset(vol->target_rfc1001_name, 0x20, |
1222 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1223 | |
50c2f753 | 1224 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1225 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1226 | valid in this workstation netbios name |
1227 | (and need special handling)? */ | |
a10faeb2 | 1228 | |
50c2f753 SF |
1229 | /* user or mount helper must uppercase |
1230 | the netbiosname */ | |
1231 | if (value[i] == 0) | |
a10faeb2 SF |
1232 | break; |
1233 | else | |
50c2f753 SF |
1234 | vol->target_rfc1001_name[i] = |
1235 | value[i]; | |
a10faeb2 SF |
1236 | } |
1237 | /* The string has 16th byte zero still from | |
1238 | set at top of the function */ | |
1397f2ee | 1239 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1240 | printk(KERN_WARNING "CIFS: server net" |
1241 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1242 | } |
6d20e840 SJ |
1243 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1244 | if (value && *value) { | |
1245 | vol->actimeo = HZ * simple_strtoul(value, | |
1246 | &value, 0); | |
1247 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1248 | cERROR(1, "CIFS: attribute cache" | |
1249 | "timeout too large"); | |
b946845a | 1250 | goto cifs_parse_mount_err; |
6d20e840 SJ |
1251 | } |
1252 | } | |
1da177e4 LT |
1253 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1254 | /* ignore */ | |
1255 | } else if (strnicmp(data, "version", 3) == 0) { | |
1256 | /* ignore */ | |
50c2f753 | 1257 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1258 | /* ignore */ |
71a394fa SF |
1259 | } else if (strnicmp(data, "rw", 2) == 0) { |
1260 | /* ignore */ | |
1261 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1262 | /* ignore */ | |
edf1ae40 SF |
1263 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1264 | vol->noblocksnd = 1; | |
1265 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1266 | vol->noautotune = 1; | |
1da177e4 LT |
1267 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1268 | (strnicmp(data, "nosuid", 6) == 0) || | |
1269 | (strnicmp(data, "exec", 4) == 0) || | |
1270 | (strnicmp(data, "noexec", 6) == 0) || | |
1271 | (strnicmp(data, "nodev", 5) == 0) || | |
1272 | (strnicmp(data, "noauto", 6) == 0) || | |
1273 | (strnicmp(data, "dev", 3) == 0)) { | |
1274 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1275 | uses these opts to set flags, and the flags are read |
1276 | by the kernel vfs layer before we get here (ie | |
1277 | before read super) so there is no point trying to | |
1278 | parse these options again and set anything and it | |
1279 | is ok to just ignore them */ | |
1da177e4 | 1280 | continue; |
1da177e4 LT |
1281 | } else if (strnicmp(data, "hard", 4) == 0) { |
1282 | vol->retry = 1; | |
1283 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1284 | vol->retry = 0; | |
1285 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1286 | vol->noperm = 0; | |
1287 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1288 | vol->noperm = 1; | |
6a0b4824 SF |
1289 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1290 | vol->remap = 1; | |
1291 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1292 | vol->remap = 0; | |
50c2f753 SF |
1293 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1294 | vol->sfu_emul = 1; | |
1295 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1296 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1297 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1298 | vol->nodfs = 1; | |
ac67055e JA |
1299 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1300 | vol->posix_paths = 1; | |
1301 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1302 | vol->posix_paths = 0; | |
c18c842b SF |
1303 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1304 | vol->no_linux_ext = 1; | |
1305 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1306 | vol->no_linux_ext = 1; | |
50c2f753 | 1307 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1308 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1309 | vol->nocase = 1; |
f636a348 JL |
1310 | } else if (strnicmp(data, "mand", 4) == 0) { |
1311 | /* ignore */ | |
1312 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1313 | /* ignore */ | |
1314 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1315 | /* ignore */ | |
c46fa8ac SF |
1316 | } else if (strnicmp(data, "brl", 3) == 0) { |
1317 | vol->nobrl = 0; | |
50c2f753 | 1318 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1319 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1320 | vol->nobrl = 1; |
d3485d37 SF |
1321 | /* turn off mandatory locking in mode |
1322 | if remote locking is turned off since the | |
1323 | local vfs will do advisory */ | |
50c2f753 SF |
1324 | if (vol->file_mode == |
1325 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1326 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1327 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1328 | /* will take the shorter form "forcemand" as well */ | |
1329 | /* This mount option will force use of mandatory | |
1330 | (DOS/Windows style) byte range locks, instead of | |
1331 | using posix advisory byte range locks, even if the | |
1332 | Unix extensions are available and posix locks would | |
1333 | be supported otherwise. If Unix extensions are not | |
1334 | negotiated this has no effect since mandatory locks | |
1335 | would be used (mandatory locks is all that those | |
1336 | those servers support) */ | |
1337 | vol->mand_lock = 1; | |
1da177e4 LT |
1338 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1339 | vol->setuids = 1; | |
1340 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1341 | vol->setuids = 0; | |
d0a9c078 JL |
1342 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1343 | vol->dynperm = true; | |
1344 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1345 | vol->dynperm = false; | |
1da177e4 LT |
1346 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1347 | vol->retry = 0; | |
1348 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1349 | vol->retry = 1; | |
1350 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1351 | vol->intr = 0; | |
1352 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1353 | vol->intr = 1; | |
be652445 SF |
1354 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1355 | vol->nostrictsync = 1; | |
1356 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1357 | vol->nostrictsync = 0; | |
50c2f753 | 1358 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1359 | vol->server_ino = 1; |
50c2f753 | 1360 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1361 | vol->server_ino = 0; |
d4ffff1f PS |
1362 | } else if (strnicmp(data, "rwpidforward", 4) == 0) { |
1363 | vol->rwpidforward = 1; | |
50c2f753 | 1364 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1365 | vol->cifs_acl = 1; |
1366 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1367 | vol->cifs_acl = 0; | |
50c2f753 | 1368 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1369 | vol->no_psx_acl = 0; |
50c2f753 | 1370 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1371 | vol->no_psx_acl = 1; |
84210e91 SF |
1372 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1373 | vol->local_lease = 1; | |
50c2f753 | 1374 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1375 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1376 | } else if (strnicmp(data, "seal", 4) == 0) { |
1377 | /* we do not do the following in secFlags because seal | |
1378 | is a per tree connection (mount) not a per socket | |
1379 | or per-smb connection option in the protocol */ | |
1380 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1381 | vol->seal = 1; | |
50c2f753 | 1382 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1383 | vol->direct_io = 1; |
50c2f753 | 1384 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1385 | vol->direct_io = 1; |
d39454ff PS |
1386 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1387 | vol->strict_io = 1; | |
1da177e4 | 1388 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1389 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1390 | "supported. Instead set " | |
1391 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1392 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d | 1393 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1394 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1395 | "kernel config option set"); |
b946845a | 1396 | goto cifs_parse_mount_err; |
607a569d | 1397 | #endif |
fa1df75d | 1398 | vol->fsc = true; |
736a3320 SM |
1399 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1400 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1401 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1402 | vol->multiuser = true; | |
1da177e4 | 1403 | } else |
50c2f753 SF |
1404 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1405 | data); | |
1da177e4 LT |
1406 | } |
1407 | if (vol->UNC == NULL) { | |
4523cc30 | 1408 | if (devname == NULL) { |
50c2f753 SF |
1409 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1410 | "target\n"); | |
b946845a | 1411 | goto cifs_parse_mount_err; |
1da177e4 LT |
1412 | } |
1413 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1414 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1415 | if (vol->UNC == NULL) |
b946845a | 1416 | goto cifs_parse_mount_err; |
50c2f753 | 1417 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1418 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1419 | vol->UNC[0] = '\\'; | |
1420 | vol->UNC[1] = '\\'; | |
1421 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1422 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1423 | "begin with // or \\\\ \n"); | |
b946845a | 1424 | goto cifs_parse_mount_err; |
1da177e4 | 1425 | } |
7c5e628f IM |
1426 | value = strpbrk(vol->UNC+2, "/\\"); |
1427 | if (value) | |
1428 | *value = '\\'; | |
1da177e4 LT |
1429 | } else { |
1430 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1431 | goto cifs_parse_mount_err; |
1da177e4 LT |
1432 | } |
1433 | } | |
0eb8a132 JL |
1434 | |
1435 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1436 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1437 | "authentication!"); | |
b946845a | 1438 | goto cifs_parse_mount_err; |
0eb8a132 JL |
1439 | } |
1440 | ||
fb8c4b14 | 1441 | if (vol->UNCip == NULL) |
1da177e4 LT |
1442 | vol->UNCip = &vol->UNC[2]; |
1443 | ||
9b9d6b24 JL |
1444 | if (uid_specified) |
1445 | vol->override_uid = override_uid; | |
1446 | else if (override_uid == 1) | |
1447 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1448 | "specified with no uid= option.\n"); | |
1449 | ||
1450 | if (gid_specified) | |
1451 | vol->override_gid = override_gid; | |
1452 | else if (override_gid == 1) | |
1453 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1454 | "specified with no gid= option.\n"); | |
1455 | ||
b946845a | 1456 | kfree(mountdata_copy); |
1da177e4 | 1457 | return 0; |
b946845a SF |
1458 | |
1459 | cifs_parse_mount_err: | |
1460 | kfree(mountdata_copy); | |
1461 | return 1; | |
1da177e4 LT |
1462 | } |
1463 | ||
3eb9a889 BG |
1464 | /** Returns true if srcaddr isn't specified and rhs isn't |
1465 | * specified, or if srcaddr is specified and | |
1466 | * matches the IP address of the rhs argument. | |
1467 | */ | |
1468 | static bool | |
1469 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1470 | { | |
1471 | switch (srcaddr->sa_family) { | |
1472 | case AF_UNSPEC: | |
1473 | return (rhs->sa_family == AF_UNSPEC); | |
1474 | case AF_INET: { | |
1475 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1476 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1477 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1478 | } | |
1479 | case AF_INET6: { | |
1480 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1481 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1482 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1483 | } | |
1484 | default: | |
1485 | WARN_ON(1); | |
1486 | return false; /* don't expect to be here */ | |
1487 | } | |
1488 | } | |
1489 | ||
4b886136 PS |
1490 | /* |
1491 | * If no port is specified in addr structure, we try to match with 445 port | |
1492 | * and if it fails - with 139 ports. It should be called only if address | |
1493 | * families of server and addr are equal. | |
1494 | */ | |
1495 | static bool | |
1496 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1497 | { | |
6da97910 | 1498 | __be16 port, *sport; |
4b886136 PS |
1499 | |
1500 | switch (addr->sa_family) { | |
1501 | case AF_INET: | |
1502 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1503 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1504 | break; | |
1505 | case AF_INET6: | |
1506 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1507 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1508 | break; | |
1509 | default: | |
1510 | WARN_ON(1); | |
1511 | return false; | |
1512 | } | |
1513 | ||
1514 | if (!port) { | |
1515 | port = htons(CIFS_PORT); | |
1516 | if (port == *sport) | |
1517 | return true; | |
1518 | ||
1519 | port = htons(RFC1001_PORT); | |
1520 | } | |
1521 | ||
1522 | return port == *sport; | |
1523 | } | |
3eb9a889 | 1524 | |
4515148e | 1525 | static bool |
3eb9a889 BG |
1526 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1527 | struct sockaddr *srcaddr) | |
4515148e | 1528 | { |
4515148e | 1529 | switch (addr->sa_family) { |
a9f1b85e PS |
1530 | case AF_INET: { |
1531 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1532 | struct sockaddr_in *srv_addr4 = | |
1533 | (struct sockaddr_in *)&server->dstaddr; | |
1534 | ||
1535 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1536 | return false; |
4515148e | 1537 | break; |
a9f1b85e PS |
1538 | } |
1539 | case AF_INET6: { | |
1540 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1541 | struct sockaddr_in6 *srv_addr6 = | |
1542 | (struct sockaddr_in6 *)&server->dstaddr; | |
1543 | ||
4515148e | 1544 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1545 | &srv_addr6->sin6_addr)) |
4515148e | 1546 | return false; |
a9f1b85e | 1547 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1548 | return false; |
4515148e JL |
1549 | break; |
1550 | } | |
a9f1b85e PS |
1551 | default: |
1552 | WARN_ON(1); | |
1553 | return false; /* don't expect to be here */ | |
1554 | } | |
4515148e | 1555 | |
3eb9a889 BG |
1556 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1557 | return false; | |
1558 | ||
4515148e JL |
1559 | return true; |
1560 | } | |
1561 | ||
daf5b0b6 JL |
1562 | static bool |
1563 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1564 | { | |
1565 | unsigned int secFlags; | |
1566 | ||
1567 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1568 | secFlags = vol->secFlg; | |
1569 | else | |
1570 | secFlags = global_secflags | vol->secFlg; | |
1571 | ||
1572 | switch (server->secType) { | |
1573 | case LANMAN: | |
1574 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1575 | return false; | |
1576 | break; | |
1577 | case NTLMv2: | |
1578 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1579 | return false; | |
1580 | break; | |
1581 | case NTLM: | |
1582 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1583 | return false; | |
1584 | break; | |
1585 | case Kerberos: | |
1586 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1587 | return false; | |
1588 | break; | |
1589 | case RawNTLMSSP: | |
1590 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1591 | return false; | |
1592 | break; | |
1593 | default: | |
1594 | /* shouldn't happen */ | |
1595 | return false; | |
1596 | } | |
1597 | ||
25985edc | 1598 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 1599 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 1600 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
1601 | return false; |
1602 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 1603 | (server->sec_mode & |
daf5b0b6 JL |
1604 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
1605 | return false; | |
1606 | ||
1607 | return true; | |
1608 | } | |
1609 | ||
37bb04e5 PS |
1610 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1611 | struct smb_vol *vol) | |
1612 | { | |
1613 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
1614 | return 0; | |
1615 | ||
1616 | if (!match_address(server, addr, | |
1617 | (struct sockaddr *)&vol->srcaddr)) | |
1618 | return 0; | |
1619 | ||
1620 | if (!match_port(server, addr)) | |
1621 | return 0; | |
1622 | ||
1623 | if (!match_security(server, vol)) | |
1624 | return 0; | |
1625 | ||
1626 | return 1; | |
1627 | } | |
1628 | ||
e7ddee90 | 1629 | static struct TCP_Server_Info * |
daf5b0b6 | 1630 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1631 | { |
e7ddee90 | 1632 | struct TCP_Server_Info *server; |
e7ddee90 | 1633 | |
3f9bcca7 | 1634 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1635 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 1636 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
1637 | continue; |
1638 | ||
e7ddee90 | 1639 | ++server->srv_count; |
3f9bcca7 | 1640 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1641 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1642 | return server; |
1da177e4 | 1643 | } |
3f9bcca7 | 1644 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1645 | return NULL; |
1646 | } | |
1b20d672 | 1647 | |
14fbf50d | 1648 | static void |
e7ddee90 | 1649 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1650 | { |
e7ddee90 | 1651 | struct task_struct *task; |
1b20d672 | 1652 | |
3f9bcca7 | 1653 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1654 | if (--server->srv_count > 0) { |
3f9bcca7 | 1655 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1656 | return; |
1da177e4 | 1657 | } |
1b20d672 | 1658 | |
f1d0c998 RL |
1659 | put_net(cifs_net_ns(server)); |
1660 | ||
e7ddee90 | 1661 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1662 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1663 | |
c74093b6 JL |
1664 | cancel_delayed_work_sync(&server->echo); |
1665 | ||
e7ddee90 JL |
1666 | spin_lock(&GlobalMid_Lock); |
1667 | server->tcpStatus = CifsExiting; | |
1668 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1669 | |
d2b91521 | 1670 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1671 | cifs_fscache_release_client_cookie(server); |
1672 | ||
21e73393 SP |
1673 | kfree(server->session_key.response); |
1674 | server->session_key.response = NULL; | |
1675 | server->session_key.len = 0; | |
1676 | ||
e7ddee90 JL |
1677 | task = xchg(&server->tsk, NULL); |
1678 | if (task) | |
1679 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1680 | } |
1681 | ||
63c038c2 JL |
1682 | static struct TCP_Server_Info * |
1683 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1684 | { | |
1685 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1686 | struct sockaddr_storage addr; |
63c038c2 JL |
1687 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1688 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1689 | int rc; | |
1690 | ||
a9ac49d3 | 1691 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1692 | |
b6b38f70 | 1693 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1694 | |
1e68b2b2 | 1695 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1696 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1697 | volume_info->UNCip, | |
67b7626a | 1698 | strlen(volume_info->UNCip), |
50d97160 | 1699 | volume_info->port); |
1e68b2b2 | 1700 | if (!rc) { |
63c038c2 JL |
1701 | /* we failed translating address */ |
1702 | rc = -EINVAL; | |
1703 | goto out_err; | |
1704 | } | |
63c038c2 JL |
1705 | } else if (volume_info->UNCip) { |
1706 | /* BB using ip addr as tcp_ses name to connect to the | |
1707 | DFS root below */ | |
b6b38f70 | 1708 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1709 | rc = -EINVAL; |
1710 | goto out_err; | |
1711 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1712 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1713 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1714 | rc = -EINVAL; |
1715 | goto out_err; | |
1716 | } | |
1717 | ||
1718 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1719 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1720 | if (tcp_ses) |
1721 | return tcp_ses; | |
1722 | ||
1723 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1724 | if (!tcp_ses) { | |
1725 | rc = -ENOMEM; | |
1726 | goto out_err; | |
1727 | } | |
1728 | ||
d2b91521 SP |
1729 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1730 | if (rc) { | |
1731 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1732 | goto out_err; | |
1733 | } | |
1734 | ||
f1d0c998 | 1735 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1736 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1737 | if (IS_ERR(tcp_ses->hostname)) { | |
1738 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1739 | goto out_err_crypto_release; |
63c038c2 JL |
1740 | } |
1741 | ||
1742 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1743 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1744 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1745 | atomic_set(&tcp_ses->inFlight, 0); |
1746 | init_waitqueue_head(&tcp_ses->response_q); | |
1747 | init_waitqueue_head(&tcp_ses->request_q); | |
1748 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1749 | mutex_init(&tcp_ses->srv_mutex); | |
1750 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1751 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1752 | memcpy(tcp_ses->server_RFC1001_name, | |
1753 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1754 | tcp_ses->session_estab = false; |
63c038c2 | 1755 | tcp_ses->sequence_number = 0; |
fda35943 | 1756 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1757 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1758 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1759 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1760 | |
1761 | /* | |
1762 | * at this point we are the only ones with the pointer | |
1763 | * to the struct since the kernel thread not created yet | |
1764 | * no need to spinlock this init of tcpStatus or srv_count | |
1765 | */ | |
1766 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1767 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1768 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1769 | ++tcp_ses->srv_count; |
1770 | ||
a9ac49d3 | 1771 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1772 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1773 | /* BB should we allow ipv6 on port 139? */ |
1774 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1775 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1776 | sizeof(struct sockaddr_in6)); | |
1777 | } else | |
1778 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1779 | sizeof(struct sockaddr_in)); | |
1780 | ||
1781 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1782 | if (rc < 0) { |
b6b38f70 | 1783 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1784 | goto out_err_crypto_release; |
63c038c2 JL |
1785 | } |
1786 | ||
1787 | /* | |
1788 | * since we're in a cifs function already, we know that | |
1789 | * this will succeed. No need for try_module_get(). | |
1790 | */ | |
1791 | __module_get(THIS_MODULE); | |
1792 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1793 | tcp_ses, "cifsd"); | |
1794 | if (IS_ERR(tcp_ses->tsk)) { | |
1795 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1796 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1797 | module_put(THIS_MODULE); |
f7c5445a | 1798 | goto out_err_crypto_release; |
63c038c2 | 1799 | } |
fd88ce93 | 1800 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1801 | |
1802 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1803 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1804 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1805 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1806 | |
488f1d2d SJ |
1807 | cifs_fscache_get_client_cookie(tcp_ses); |
1808 | ||
c74093b6 JL |
1809 | /* queue echo request delayed work */ |
1810 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1811 | ||
63c038c2 JL |
1812 | return tcp_ses; |
1813 | ||
f7c5445a | 1814 | out_err_crypto_release: |
d2b91521 SP |
1815 | cifs_crypto_shash_release(tcp_ses); |
1816 | ||
f1d0c998 RL |
1817 | put_net(cifs_net_ns(tcp_ses)); |
1818 | ||
63c038c2 JL |
1819 | out_err: |
1820 | if (tcp_ses) { | |
8347a5cd SF |
1821 | if (!IS_ERR(tcp_ses->hostname)) |
1822 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1823 | if (tcp_ses->ssocket) |
1824 | sock_release(tcp_ses->ssocket); | |
1825 | kfree(tcp_ses); | |
1826 | } | |
1827 | return ERR_PTR(rc); | |
1828 | } | |
1829 | ||
96daf2b0 | 1830 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
1831 | { |
1832 | switch (ses->server->secType) { | |
1833 | case Kerberos: | |
1834 | if (vol->cred_uid != ses->cred_uid) | |
1835 | return 0; | |
1836 | break; | |
1837 | default: | |
1838 | /* anything else takes username/password */ | |
1839 | if (ses->user_name == NULL) | |
1840 | return 0; | |
1841 | if (strncmp(ses->user_name, vol->username, | |
1842 | MAX_USERNAME_SIZE)) | |
1843 | return 0; | |
1844 | if (strlen(vol->username) != 0 && | |
1845 | ses->password != NULL && | |
1846 | strncmp(ses->password, | |
1847 | vol->password ? vol->password : "", | |
1848 | MAX_PASSWORD_SIZE)) | |
1849 | return 0; | |
1850 | } | |
1851 | return 1; | |
1852 | } | |
1853 | ||
96daf2b0 | 1854 | static struct cifs_ses * |
4ff67b72 | 1855 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1856 | { |
96daf2b0 | 1857 | struct cifs_ses *ses; |
dea570e0 | 1858 | |
3f9bcca7 | 1859 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 1860 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
1861 | if (!match_session(ses, vol)) |
1862 | continue; | |
14fbf50d | 1863 | ++ses->ses_count; |
3f9bcca7 | 1864 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1865 | return ses; |
1866 | } | |
3f9bcca7 | 1867 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1868 | return NULL; |
1869 | } | |
dea570e0 | 1870 | |
14fbf50d | 1871 | static void |
96daf2b0 | 1872 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d JL |
1873 | { |
1874 | int xid; | |
1875 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1876 | |
36988c76 | 1877 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1878 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1879 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1880 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1881 | return; |
1882 | } | |
dea570e0 | 1883 | |
14fbf50d | 1884 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1885 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1886 | |
14fbf50d JL |
1887 | if (ses->status == CifsGood) { |
1888 | xid = GetXid(); | |
1889 | CIFSSMBLogoff(xid, ses); | |
1890 | _FreeXid(xid); | |
1891 | } | |
1892 | sesInfoFree(ses); | |
1893 | cifs_put_tcp_session(server); | |
1894 | } | |
dea570e0 | 1895 | |
d9b94201 SF |
1896 | static bool warned_on_ntlm; /* globals init to false automatically */ |
1897 | ||
96daf2b0 | 1898 | static struct cifs_ses * |
36988c76 JL |
1899 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
1900 | { | |
1901 | int rc = -ENOMEM, xid; | |
96daf2b0 | 1902 | struct cifs_ses *ses; |
a9f1b85e PS |
1903 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1904 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1905 | |
1906 | xid = GetXid(); | |
1907 | ||
4ff67b72 | 1908 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1909 | if (ses) { |
1910 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1911 | ||
36988c76 | 1912 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1913 | rc = cifs_negotiate_protocol(xid, ses); |
1914 | if (rc) { | |
1915 | mutex_unlock(&ses->session_mutex); | |
1916 | /* problem -- put our ses reference */ | |
1917 | cifs_put_smb_ses(ses); | |
1918 | FreeXid(xid); | |
1919 | return ERR_PTR(rc); | |
1920 | } | |
36988c76 JL |
1921 | if (ses->need_reconnect) { |
1922 | cFYI(1, "Session needs reconnect"); | |
1923 | rc = cifs_setup_session(xid, ses, | |
1924 | volume_info->local_nls); | |
1925 | if (rc) { | |
1926 | mutex_unlock(&ses->session_mutex); | |
1927 | /* problem -- put our reference */ | |
1928 | cifs_put_smb_ses(ses); | |
1929 | FreeXid(xid); | |
1930 | return ERR_PTR(rc); | |
1931 | } | |
1932 | } | |
1933 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1934 | |
1935 | /* existing SMB ses has a server reference already */ | |
1936 | cifs_put_tcp_session(server); | |
36988c76 JL |
1937 | FreeXid(xid); |
1938 | return ses; | |
1939 | } | |
1940 | ||
1941 | cFYI(1, "Existing smb sess not found"); | |
1942 | ses = sesInfoAlloc(); | |
1943 | if (ses == NULL) | |
1944 | goto get_ses_fail; | |
1945 | ||
1946 | /* new SMB session uses our server ref */ | |
1947 | ses->server = server; | |
a9f1b85e PS |
1948 | if (server->dstaddr.ss_family == AF_INET6) |
1949 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 1950 | else |
a9f1b85e | 1951 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 1952 | |
8727c8a8 SF |
1953 | if (volume_info->username) { |
1954 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
1955 | if (!ses->user_name) | |
1956 | goto get_ses_fail; | |
1957 | } | |
36988c76 JL |
1958 | |
1959 | /* volume_info->password freed at unmount */ | |
1960 | if (volume_info->password) { | |
1961 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1962 | if (!ses->password) | |
1963 | goto get_ses_fail; | |
1964 | } | |
1965 | if (volume_info->domainname) { | |
d3686d54 SP |
1966 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
1967 | if (!ses->domainName) | |
1968 | goto get_ses_fail; | |
36988c76 | 1969 | } |
3e4b3e1f | 1970 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 1971 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
1972 | |
1973 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
1974 | supported for many years, time to update default security mechanism */ | |
1975 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
1976 | warned_on_ntlm = true; | |
1977 | cERROR(1, "default security mechanism requested. The default " | |
1978 | "security mechanism will be upgraded from ntlm to " | |
c592a707 | 1979 | "ntlmv2 in kernel release 3.1"); |
d9b94201 | 1980 | } |
36988c76 JL |
1981 | ses->overrideSecFlg = volume_info->secFlg; |
1982 | ||
1983 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
1984 | rc = cifs_negotiate_protocol(xid, ses); |
1985 | if (!rc) | |
1986 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 1987 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 1988 | if (rc) |
36988c76 JL |
1989 | goto get_ses_fail; |
1990 | ||
1991 | /* success, put it on the list */ | |
3f9bcca7 | 1992 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 1993 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 1994 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
1995 | |
1996 | FreeXid(xid); | |
1997 | return ses; | |
1998 | ||
1999 | get_ses_fail: | |
2000 | sesInfoFree(ses); | |
2001 | FreeXid(xid); | |
2002 | return ERR_PTR(rc); | |
2003 | } | |
2004 | ||
96daf2b0 | 2005 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2006 | { |
2007 | if (tcon->tidStatus == CifsExiting) | |
2008 | return 0; | |
2009 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2010 | return 0; | |
2011 | return 1; | |
2012 | } | |
2013 | ||
96daf2b0 SF |
2014 | static struct cifs_tcon * |
2015 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2016 | { |
2017 | struct list_head *tmp; | |
96daf2b0 | 2018 | struct cifs_tcon *tcon; |
f1987b44 | 2019 | |
3f9bcca7 | 2020 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2021 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2022 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2023 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2024 | continue; |
f1987b44 | 2025 | ++tcon->tc_count; |
3f9bcca7 | 2026 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2027 | return tcon; |
1da177e4 | 2028 | } |
3f9bcca7 | 2029 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2030 | return NULL; |
2031 | } | |
2032 | ||
f1987b44 | 2033 | static void |
96daf2b0 | 2034 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 JL |
2035 | { |
2036 | int xid; | |
96daf2b0 | 2037 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2038 | |
d00c28de | 2039 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2040 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2041 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2042 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2043 | return; |
2044 | } | |
2045 | ||
2046 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2047 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2048 | |
2049 | xid = GetXid(); | |
2050 | CIFSSMBTDis(xid, tcon); | |
2051 | _FreeXid(xid); | |
2052 | ||
d03382ce | 2053 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2054 | tconInfoFree(tcon); |
f1987b44 JL |
2055 | cifs_put_smb_ses(ses); |
2056 | } | |
2057 | ||
96daf2b0 SF |
2058 | static struct cifs_tcon * |
2059 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2060 | { |
2061 | int rc, xid; | |
96daf2b0 | 2062 | struct cifs_tcon *tcon; |
d00c28de JL |
2063 | |
2064 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2065 | if (tcon) { | |
2066 | cFYI(1, "Found match on UNC path"); | |
2067 | /* existing tcon already has a reference */ | |
2068 | cifs_put_smb_ses(ses); | |
2069 | if (tcon->seal != volume_info->seal) | |
2070 | cERROR(1, "transport encryption setting " | |
2071 | "conflicts with existing tid"); | |
2072 | return tcon; | |
2073 | } | |
2074 | ||
2075 | tcon = tconInfoAlloc(); | |
2076 | if (tcon == NULL) { | |
2077 | rc = -ENOMEM; | |
2078 | goto out_fail; | |
2079 | } | |
2080 | ||
2081 | tcon->ses = ses; | |
2082 | if (volume_info->password) { | |
2083 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2084 | if (!tcon->password) { | |
2085 | rc = -ENOMEM; | |
2086 | goto out_fail; | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2091 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2092 | cERROR(1, "Missing share name"); | |
2093 | rc = -ENODEV; | |
2094 | goto out_fail; | |
2095 | } | |
2096 | ||
2097 | /* BB Do we need to wrap session_mutex around | |
2098 | * this TCon call and Unix SetFS as | |
2099 | * we do on SessSetup and reconnect? */ | |
2100 | xid = GetXid(); | |
2101 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2102 | FreeXid(xid); | |
2103 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2104 | if (rc) | |
2105 | goto out_fail; | |
2106 | ||
2107 | if (volume_info->nodfs) { | |
2108 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2109 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2110 | } | |
2111 | tcon->seal = volume_info->seal; | |
2112 | /* we can have only one retry value for a connection | |
2113 | to a share so for resources mounted more than once | |
2114 | to the same server share the last value passed in | |
2115 | for the retry flag is used */ | |
2116 | tcon->retry = volume_info->retry; | |
2117 | tcon->nocase = volume_info->nocase; | |
2118 | tcon->local_lease = volume_info->local_lease; | |
2119 | ||
3f9bcca7 | 2120 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2121 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2122 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2123 | |
d03382ce SJ |
2124 | cifs_fscache_get_super_cookie(tcon); |
2125 | ||
d00c28de JL |
2126 | return tcon; |
2127 | ||
2128 | out_fail: | |
2129 | tconInfoFree(tcon); | |
2130 | return ERR_PTR(rc); | |
2131 | } | |
2132 | ||
9d002df4 JL |
2133 | void |
2134 | cifs_put_tlink(struct tcon_link *tlink) | |
2135 | { | |
2136 | if (!tlink || IS_ERR(tlink)) | |
2137 | return; | |
2138 | ||
2139 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2140 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2141 | tlink->tl_time = jiffies; | |
2142 | return; | |
2143 | } | |
2144 | ||
2145 | if (!IS_ERR(tlink_tcon(tlink))) | |
2146 | cifs_put_tcon(tlink_tcon(tlink)); | |
2147 | kfree(tlink); | |
2148 | return; | |
2149 | } | |
d00c28de | 2150 | |
25c7f41e | 2151 | static inline struct tcon_link * |
cd51875d PS |
2152 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2153 | { | |
2154 | return cifs_sb->master_tlink; | |
2155 | } | |
25c7f41e PS |
2156 | |
2157 | static int | |
2158 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2159 | { | |
2160 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2161 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2162 | ||
2163 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2164 | return 0; | |
2165 | ||
2166 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2167 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2168 | return 0; | |
2169 | ||
2170 | if (old->rsize != new->rsize) | |
2171 | return 0; | |
2172 | ||
2173 | /* | |
2174 | * We want to share sb only if we don't specify wsize or specified wsize | |
2175 | * is greater or equal than existing one. | |
2176 | */ | |
2177 | if (new->wsize && new->wsize < old->wsize) | |
2178 | return 0; | |
2179 | ||
2180 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) | |
2181 | return 0; | |
2182 | ||
2183 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2184 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2185 | return 0; | |
2186 | ||
2187 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2188 | return 0; | |
2189 | ||
2190 | if (old->actimeo != new->actimeo) | |
2191 | return 0; | |
2192 | ||
2193 | return 1; | |
2194 | } | |
2195 | ||
2196 | int | |
2197 | cifs_match_super(struct super_block *sb, void *data) | |
2198 | { | |
2199 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2200 | struct smb_vol *volume_info; | |
2201 | struct cifs_sb_info *cifs_sb; | |
2202 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2203 | struct cifs_ses *ses; |
2204 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2205 | struct tcon_link *tlink; |
2206 | struct sockaddr_storage addr; | |
2207 | int rc = 0; | |
2208 | ||
2209 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2210 | ||
2211 | spin_lock(&cifs_tcp_ses_lock); | |
2212 | cifs_sb = CIFS_SB(sb); | |
2213 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2214 | if (IS_ERR(tlink)) { | |
2215 | spin_unlock(&cifs_tcp_ses_lock); | |
2216 | return rc; | |
2217 | } | |
2218 | tcon = tlink_tcon(tlink); | |
2219 | ses = tcon->ses; | |
2220 | tcp_srv = ses->server; | |
2221 | ||
2222 | volume_info = mnt_data->vol; | |
2223 | ||
2224 | if (!volume_info->UNCip || !volume_info->UNC) | |
2225 | goto out; | |
2226 | ||
2227 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2228 | volume_info->UNCip, | |
2229 | strlen(volume_info->UNCip), | |
2230 | volume_info->port); | |
2231 | if (!rc) | |
2232 | goto out; | |
2233 | ||
2234 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2235 | !match_session(ses, volume_info) || | |
2236 | !match_tcon(tcon, volume_info->UNC)) { | |
2237 | rc = 0; | |
2238 | goto out; | |
2239 | } | |
2240 | ||
2241 | rc = compare_mount_options(sb, mnt_data); | |
2242 | out: | |
2243 | cifs_put_tlink(tlink); | |
2244 | spin_unlock(&cifs_tcp_ses_lock); | |
2245 | return rc; | |
2246 | } | |
2247 | ||
1da177e4 | 2248 | int |
96daf2b0 | 2249 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
50c2f753 | 2250 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
366781c1 | 2251 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2252 | { |
2253 | char *temp_unc; | |
2254 | int rc = 0; | |
2255 | ||
2256 | *pnum_referrals = 0; | |
366781c1 | 2257 | *preferrals = NULL; |
1da177e4 LT |
2258 | |
2259 | if (pSesInfo->ipc_tid == 0) { | |
2260 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2261 | strnlen(pSesInfo->serverName, |
2262 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2263 | + 1 + 4 /* slash IPC$ */ + 2, |
2264 | GFP_KERNEL); | |
2265 | if (temp_unc == NULL) | |
2266 | return -ENOMEM; | |
2267 | temp_unc[0] = '\\'; | |
2268 | temp_unc[1] = '\\'; | |
2269 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2270 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2271 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2272 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2273 | kfree(temp_unc); |
2274 | } | |
2275 | if (rc == 0) | |
c2cf07d5 | 2276 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2277 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2278 | /* BB map targetUNCs to dfs_info3 structures, here or |
2279 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2280 | |
2281 | return rc; | |
2282 | } | |
2283 | ||
09e50d55 JL |
2284 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2285 | static struct lock_class_key cifs_key[2]; | |
2286 | static struct lock_class_key cifs_slock_key[2]; | |
2287 | ||
2288 | static inline void | |
2289 | cifs_reclassify_socket4(struct socket *sock) | |
2290 | { | |
2291 | struct sock *sk = sock->sk; | |
2292 | BUG_ON(sock_owned_by_user(sk)); | |
2293 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2294 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2295 | } | |
2296 | ||
2297 | static inline void | |
2298 | cifs_reclassify_socket6(struct socket *sock) | |
2299 | { | |
2300 | struct sock *sk = sock->sk; | |
2301 | BUG_ON(sock_owned_by_user(sk)); | |
2302 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2303 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2304 | } | |
2305 | #else | |
2306 | static inline void | |
2307 | cifs_reclassify_socket4(struct socket *sock) | |
2308 | { | |
2309 | } | |
2310 | ||
2311 | static inline void | |
2312 | cifs_reclassify_socket6(struct socket *sock) | |
2313 | { | |
2314 | } | |
2315 | #endif | |
2316 | ||
1da177e4 | 2317 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2318 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2319 | { |
50c2f753 | 2320 | unsigned int i, j; |
1da177e4 | 2321 | |
50c2f753 | 2322 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2323 | /* mask a nibble at a time and encode */ |
2324 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2325 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2326 | j += 2; |
1da177e4 LT |
2327 | } |
2328 | ||
2329 | } | |
2330 | ||
3eb9a889 BG |
2331 | static int |
2332 | bind_socket(struct TCP_Server_Info *server) | |
2333 | { | |
2334 | int rc = 0; | |
2335 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2336 | /* Bind to the specified local IP address */ | |
2337 | struct socket *socket = server->ssocket; | |
2338 | rc = socket->ops->bind(socket, | |
2339 | (struct sockaddr *) &server->srcaddr, | |
2340 | sizeof(server->srcaddr)); | |
2341 | if (rc < 0) { | |
2342 | struct sockaddr_in *saddr4; | |
2343 | struct sockaddr_in6 *saddr6; | |
2344 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2345 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2346 | if (saddr6->sin6_family == AF_INET6) | |
2347 | cERROR(1, "cifs: " | |
2348 | "Failed to bind to: %pI6c, error: %d\n", | |
2349 | &saddr6->sin6_addr, rc); | |
2350 | else | |
2351 | cERROR(1, "cifs: " | |
2352 | "Failed to bind to: %pI4, error: %d\n", | |
2353 | &saddr4->sin_addr.s_addr, rc); | |
2354 | } | |
2355 | } | |
2356 | return rc; | |
2357 | } | |
1da177e4 LT |
2358 | |
2359 | static int | |
a9f1b85e | 2360 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2361 | { |
2362 | int rc = 0; | |
a9f1b85e PS |
2363 | /* |
2364 | * some servers require RFC1001 sessinit before sending | |
2365 | * negprot - BB check reconnection in case where second | |
2366 | * sessinit is sent but no second negprot | |
2367 | */ | |
2368 | struct rfc1002_session_packet *ses_init_buf; | |
2369 | struct smb_hdr *smb_buf; | |
2370 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2371 | GFP_KERNEL); | |
2372 | if (ses_init_buf) { | |
2373 | ses_init_buf->trailer.session_req.called_len = 32; | |
2374 | ||
2375 | if (server->server_RFC1001_name && | |
2376 | server->server_RFC1001_name[0] != 0) | |
2377 | rfc1002mangle(ses_init_buf->trailer. | |
2378 | session_req.called_name, | |
2379 | server->server_RFC1001_name, | |
2380 | RFC1001_NAME_LEN_WITH_NULL); | |
2381 | else | |
2382 | rfc1002mangle(ses_init_buf->trailer. | |
2383 | session_req.called_name, | |
2384 | DEFAULT_CIFS_CALLED_NAME, | |
2385 | RFC1001_NAME_LEN_WITH_NULL); | |
2386 | ||
2387 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2388 | ||
2389 | /* | |
2390 | * calling name ends in null (byte 16) from old smb | |
2391 | * convention. | |
2392 | */ | |
2393 | if (server->workstation_RFC1001_name && | |
2394 | server->workstation_RFC1001_name[0] != 0) | |
2395 | rfc1002mangle(ses_init_buf->trailer. | |
2396 | session_req.calling_name, | |
2397 | server->workstation_RFC1001_name, | |
2398 | RFC1001_NAME_LEN_WITH_NULL); | |
2399 | else | |
2400 | rfc1002mangle(ses_init_buf->trailer. | |
2401 | session_req.calling_name, | |
2402 | "LINUX_CIFS_CLNT", | |
2403 | RFC1001_NAME_LEN_WITH_NULL); | |
2404 | ||
2405 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2406 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2407 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2408 | ||
2409 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2410 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2411 | rc = smb_send(server, smb_buf, 0x44); |
2412 | kfree(ses_init_buf); | |
2413 | /* | |
2414 | * RFC1001 layer in at least one server | |
2415 | * requires very short break before negprot | |
2416 | * presumably because not expecting negprot | |
2417 | * to follow so fast. This is a simple | |
2418 | * solution that works without | |
2419 | * complicating the code and causes no | |
2420 | * significant slowing down on mount | |
2421 | * for everyone else | |
2422 | */ | |
2423 | usleep_range(1000, 2000); | |
2424 | } | |
2425 | /* | |
2426 | * else the negprot may still work without this | |
2427 | * even though malloc failed | |
2428 | */ | |
2429 | ||
2430 | return rc; | |
2431 | } | |
2432 | ||
2433 | static int | |
2434 | generic_ip_connect(struct TCP_Server_Info *server) | |
2435 | { | |
2436 | int rc = 0; | |
6da97910 | 2437 | __be16 sport; |
a9f1b85e | 2438 | int slen, sfamily; |
bcf4b106 | 2439 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2440 | struct sockaddr *saddr; |
2441 | ||
2442 | saddr = (struct sockaddr *) &server->dstaddr; | |
2443 | ||
2444 | if (server->dstaddr.ss_family == AF_INET6) { | |
2445 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2446 | slen = sizeof(struct sockaddr_in6); | |
2447 | sfamily = AF_INET6; | |
2448 | } else { | |
2449 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2450 | slen = sizeof(struct sockaddr_in); | |
2451 | sfamily = AF_INET; | |
2452 | } | |
1da177e4 | 2453 | |
bcf4b106 | 2454 | if (socket == NULL) { |
f1d0c998 RL |
2455 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2456 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2457 | if (rc < 0) { |
b6b38f70 | 2458 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2459 | server->ssocket = NULL; |
1da177e4 | 2460 | return rc; |
1da177e4 | 2461 | } |
bcf4b106 JL |
2462 | |
2463 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2464 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2465 | server->ssocket = socket; |
2466 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2467 | if (sfamily == AF_INET6) |
2468 | cifs_reclassify_socket6(socket); | |
2469 | else | |
2470 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2471 | } |
2472 | ||
3eb9a889 BG |
2473 | rc = bind_socket(server); |
2474 | if (rc < 0) | |
2475 | return rc; | |
2476 | ||
bcf4b106 JL |
2477 | /* |
2478 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2479 | * the default. sock_setsockopt not used because it expects |
2480 | * user space buffer | |
bcf4b106 JL |
2481 | */ |
2482 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2483 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2484 | |
b387eaeb | 2485 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2486 | if (server->noautotune) { |
2487 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2488 | socket->sk->sk_sndbuf = 200 * 1024; | |
2489 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2490 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2491 | } |
1da177e4 | 2492 | |
6a5fa236 | 2493 | if (server->tcp_nodelay) { |
a9f1b85e | 2494 | int val = 1; |
6a5fa236 SF |
2495 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2496 | (char *)&val, sizeof(val)); | |
2497 | if (rc) | |
b6b38f70 | 2498 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2499 | } |
2500 | ||
b6b38f70 | 2501 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2502 | socket->sk->sk_sndbuf, |
b6b38f70 | 2503 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2504 | |
ee1b3ea9 JL |
2505 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2506 | if (rc < 0) { | |
2507 | cFYI(1, "Error %d connecting to server", rc); | |
2508 | sock_release(socket); | |
2509 | server->ssocket = NULL; | |
2510 | return rc; | |
2511 | } | |
2512 | ||
a9f1b85e PS |
2513 | if (sport == htons(RFC1001_PORT)) |
2514 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2515 | |
1da177e4 LT |
2516 | return rc; |
2517 | } | |
2518 | ||
2519 | static int | |
a9f1b85e | 2520 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2521 | { |
6da97910 | 2522 | __be16 *sport; |
a9f1b85e PS |
2523 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2524 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2525 | |
a9f1b85e PS |
2526 | if (server->dstaddr.ss_family == AF_INET6) |
2527 | sport = &addr6->sin6_port; | |
2528 | else | |
2529 | sport = &addr->sin_port; | |
1da177e4 | 2530 | |
a9f1b85e PS |
2531 | if (*sport == 0) { |
2532 | int rc; | |
1da177e4 | 2533 | |
a9f1b85e PS |
2534 | /* try with 445 port at first */ |
2535 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2536 | |
a9f1b85e | 2537 | rc = generic_ip_connect(server); |
1da177e4 | 2538 | if (rc >= 0) |
a9f1b85e | 2539 | return rc; |
6a5fa236 | 2540 | |
a9f1b85e PS |
2541 | /* if it failed, try with 139 port */ |
2542 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2543 | } |
2544 | ||
a9f1b85e | 2545 | return generic_ip_connect(server); |
1da177e4 LT |
2546 | } |
2547 | ||
96daf2b0 | 2548 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
2c6292ae | 2549 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
2550 | { |
2551 | /* if we are reconnecting then should we check to see if | |
2552 | * any requested capabilities changed locally e.g. via | |
2553 | * remount but we can not do much about it here | |
2554 | * if they have (even if we could detect it by the following) | |
2555 | * Perhaps we could add a backpointer to array of sb from tcon | |
2556 | * or if we change to make all sb to same share the same | |
2557 | * sb as NFS - then we only have one backpointer to sb. | |
2558 | * What if we wanted to mount the server share twice once with | |
2559 | * and once without posixacls or posix paths? */ | |
2560 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2561 | |
c18c842b SF |
2562 | if (vol_info && vol_info->no_linux_ext) { |
2563 | tcon->fsUnixInfo.Capability = 0; | |
2564 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2565 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2566 | return; |
2567 | } else if (vol_info) | |
2568 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2569 | ||
2570 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2571 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2572 | return; |
2573 | } | |
50c2f753 | 2574 | |
fb8c4b14 | 2575 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2576 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 2577 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
2578 | /* check for reconnect case in which we do not |
2579 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2580 | if (vol_info == NULL) { |
50c2f753 | 2581 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2582 | originally at mount time */ |
2583 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2584 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2585 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2586 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2587 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2588 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2589 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2590 | cERROR(1, "possible reconnect error"); |
2591 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2592 | } |
8af18971 | 2593 | } |
50c2f753 | 2594 | |
6848b733 SF |
2595 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
2596 | cERROR(1, "per-share encryption not supported yet"); | |
2597 | ||
8af18971 | 2598 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2599 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2600 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2601 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2602 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
2603 | if (cifs_sb) |
2604 | cifs_sb->mnt_cifs_flags |= | |
2605 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
2606 | } |
2607 | ||
75865f8c | 2608 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2609 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2610 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2611 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
2612 | if (cifs_sb) |
2613 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
2614 | CIFS_MOUNT_POSIX_PATHS; |
2615 | } | |
50c2f753 | 2616 | |
2c6292ae | 2617 | if (cifs_sb && (cifs_sb->rsize > 127 * 1024)) { |
75865f8c | 2618 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { |
2c6292ae | 2619 | cifs_sb->rsize = 127 * 1024; |
b6b38f70 | 2620 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2621 | } |
2622 | } | |
50c2f753 SF |
2623 | |
2624 | ||
b6b38f70 | 2625 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2626 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2627 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2628 | cFYI(1, "FCNTL cap"); |
75865f8c | 2629 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2630 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2631 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2632 | cFYI(1, "POSIX path cap"); |
75865f8c | 2633 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2634 | cFYI(1, "XATTR cap"); |
75865f8c | 2635 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2636 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2637 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2638 | cFYI(1, "very large read cap"); |
75865f8c | 2639 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2640 | cFYI(1, "very large write cap"); |
6848b733 SF |
2641 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
2642 | cFYI(1, "transport encryption cap"); | |
2643 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
2644 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
2645 | #endif /* CIFS_DEBUG2 */ |
2646 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2647 | if (vol_info == NULL) { |
b6b38f70 | 2648 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2649 | } else |
b6b38f70 | 2650 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2651 | "with the server failed. Consider " |
2652 | "mounting with the Unix Extensions\n" | |
2653 | "disabled, if problems are found, " | |
2654 | "by specifying the nounix mount " | |
b6b38f70 | 2655 | "option."); |
5a44b319 | 2656 | |
8af18971 SF |
2657 | } |
2658 | } | |
2659 | } | |
2660 | ||
724d9f1c PS |
2661 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
2662 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2663 | { |
2de970ff JL |
2664 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2665 | ||
2ced6f69 AV |
2666 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
2667 | cifs_sb->tlink_tree = RB_ROOT; | |
2668 | ||
3b795210 | 2669 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2670 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2671 | pvolume_info->rsize); | |
3b795210 SF |
2672 | cifs_sb->rsize = CIFSMaxBufSize; |
2673 | } else if ((pvolume_info->rsize) && | |
2674 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2675 | cifs_sb->rsize = pvolume_info->rsize; | |
2676 | else /* default */ | |
2677 | cifs_sb->rsize = CIFSMaxBufSize; | |
2678 | ||
3b795210 SF |
2679 | if (cifs_sb->rsize < 2048) { |
2680 | cifs_sb->rsize = 2048; | |
2681 | /* Windows ME may prefer this */ | |
b6b38f70 | 2682 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 | 2683 | } |
25c7f41e PS |
2684 | |
2685 | /* | |
2686 | * Temporarily set wsize for matching superblock. If we end up using | |
2687 | * new sb then cifs_negotiate_wsize will later negotiate it downward | |
2688 | * if needed. | |
2689 | */ | |
2690 | cifs_sb->wsize = pvolume_info->wsize; | |
2691 | ||
3b795210 SF |
2692 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
2693 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2694 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2695 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2696 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2697 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2698 | |
6d20e840 | 2699 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 2700 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 2701 | |
3b795210 SF |
2702 | if (pvolume_info->noperm) |
2703 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2704 | if (pvolume_info->setuids) | |
2705 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2706 | if (pvolume_info->server_ino) | |
2707 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2708 | if (pvolume_info->remap) | |
2709 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2710 | if (pvolume_info->no_xattr) | |
2711 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2712 | if (pvolume_info->sfu_emul) | |
2713 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2714 | if (pvolume_info->nobrl) | |
2715 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2716 | if (pvolume_info->nostrictsync) |
4717bed6 | 2717 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2718 | if (pvolume_info->mand_lock) |
2719 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
2720 | if (pvolume_info->rwpidforward) |
2721 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
2722 | if (pvolume_info->cifs_acl) |
2723 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2724 | if (pvolume_info->override_uid) | |
2725 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2726 | if (pvolume_info->override_gid) | |
2727 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2728 | if (pvolume_info->dynperm) | |
2729 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2730 | if (pvolume_info->fsc) |
2731 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2732 | if (pvolume_info->multiuser) |
2733 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2734 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
2735 | if (pvolume_info->strict_io) |
2736 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 2737 | if (pvolume_info->direct_io) { |
b6b38f70 | 2738 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2739 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2740 | } | |
736a3320 SM |
2741 | if (pvolume_info->mfsymlinks) { |
2742 | if (pvolume_info->sfu_emul) { | |
2743 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2744 | "mount option is used"); | |
2745 | } else { | |
2746 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2747 | } | |
2748 | } | |
3b795210 SF |
2749 | |
2750 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2751 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2752 | "mount option supported"); | |
b1c8d2b4 JL |
2753 | } |
2754 | ||
f7910cbd JL |
2755 | /* |
2756 | * When the server supports very large writes via POSIX extensions, we can | |
1190f6a0 JL |
2757 | * allow up to 2^24-1, minus the size of a WRITE_AND_X header, not including |
2758 | * the RFC1001 length. | |
f7910cbd JL |
2759 | * |
2760 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
2761 | * writeback however as we have to allocate an array of pointers for the |
2762 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
f7910cbd | 2763 | */ |
1190f6a0 | 2764 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
f7910cbd JL |
2765 | |
2766 | /* | |
1190f6a0 JL |
2767 | * When the server doesn't allow large posix writes, only allow a wsize of |
2768 | * 128k minus the size of the WRITE_AND_X header. That allows for a write up | |
2769 | * to the maximum size described by RFC1002. | |
f7910cbd | 2770 | */ |
1190f6a0 | 2771 | #define CIFS_MAX_RFC1002_WSIZE (128 * 1024 - sizeof(WRITE_REQ) + 4) |
f7910cbd JL |
2772 | |
2773 | /* | |
2774 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
2775 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
2776 | * a single wsize request with a single call. | |
2777 | */ | |
2778 | #define CIFS_DEFAULT_WSIZE (1024 * 1024) | |
2779 | ||
2780 | static unsigned int | |
96daf2b0 | 2781 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
2782 | { |
2783 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
2784 | struct TCP_Server_Info *server = tcon->ses->server; | |
2785 | unsigned int wsize = pvolume_info->wsize ? pvolume_info->wsize : | |
2786 | CIFS_DEFAULT_WSIZE; | |
2787 | ||
2788 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
2789 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 2790 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 2791 | |
1190f6a0 JL |
2792 | /* |
2793 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
2794 | * Limit it to max buffer offered by the server, minus the size of the | |
2795 | * WRITEX header, not including the 4 byte RFC1001 length. | |
2796 | */ | |
2797 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
2798 | (!(server->capabilities & CAP_UNIX) && | |
2799 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
2800 | wsize = min_t(unsigned int, wsize, | |
2801 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd JL |
2802 | |
2803 | /* hard limit of CIFS_MAX_WSIZE */ | |
2804 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
2805 | ||
2806 | return wsize; | |
2807 | } | |
2808 | ||
e4cce94c | 2809 | static int |
96daf2b0 | 2810 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
2811 | struct cifs_sb_info *cifs_sb, const char *full_path) |
2812 | { | |
2813 | int rc; | |
e4cce94c IM |
2814 | FILE_ALL_INFO *pfile_info; |
2815 | ||
e4cce94c IM |
2816 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2817 | if (pfile_info == NULL) | |
2818 | return -ENOMEM; | |
2819 | ||
2820 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2821 | 0 /* not legacy */, cifs_sb->local_nls, | |
2822 | cifs_sb->mnt_cifs_flags & | |
2823 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
2824 | |
2825 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
2826 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
2827 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
2828 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
2829 | kfree(pfile_info); |
2830 | return rc; | |
2831 | } | |
2832 | ||
724d9f1c | 2833 | void |
f9e59bcb | 2834 | cifs_cleanup_volume_info(struct smb_vol *volume_info) |
1bfe73c2 | 2835 | { |
f9e59bcb | 2836 | if (!volume_info) |
1bfe73c2 IM |
2837 | return; |
2838 | ||
b946845a | 2839 | kfree(volume_info->username); |
1bfe73c2 IM |
2840 | kzfree(volume_info->password); |
2841 | kfree(volume_info->UNC); | |
b946845a SF |
2842 | kfree(volume_info->UNCip); |
2843 | kfree(volume_info->domainname); | |
2844 | kfree(volume_info->iocharset); | |
1bfe73c2 IM |
2845 | kfree(volume_info->prepath); |
2846 | kfree(volume_info); | |
1bfe73c2 IM |
2847 | return; |
2848 | } | |
2849 | ||
2d6d589d | 2850 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2851 | /* build_path_to_root returns full path to root when |
2852 | * we do not have an exiting connection (tcon) */ | |
2853 | static char * | |
b2a0fa15 | 2854 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
2855 | const struct cifs_sb_info *cifs_sb) |
2856 | { | |
b2a0fa15 JL |
2857 | char *full_path, *pos; |
2858 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
2859 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 2860 | |
b2a0fa15 | 2861 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
2862 | if (full_path == NULL) |
2863 | return ERR_PTR(-ENOMEM); | |
2864 | ||
b2a0fa15 JL |
2865 | strncpy(full_path, vol->UNC, unc_len); |
2866 | pos = full_path + unc_len; | |
2867 | ||
2868 | if (pplen) { | |
2869 | strncpy(pos, vol->prepath, pplen); | |
2870 | pos += pplen; | |
2871 | } | |
2872 | ||
2873 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 2874 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 2875 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
2876 | return full_path; |
2877 | } | |
dd613945 SF |
2878 | |
2879 | /* | |
2880 | * Perform a dfs referral query for a share and (optionally) prefix | |
2881 | * | |
046462ab SF |
2882 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
2883 | * to a string containing updated options for the submount. Otherwise it | |
2884 | * will be left untouched. | |
dd613945 SF |
2885 | * |
2886 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
2887 | * determine whether there were referrals. | |
2888 | */ | |
2889 | static int | |
96daf2b0 | 2890 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
dd613945 | 2891 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 2892 | int check_prefix) |
dd613945 SF |
2893 | { |
2894 | int rc; | |
2895 | unsigned int num_referrals = 0; | |
2896 | struct dfs_info3_param *referrals = NULL; | |
2897 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
2898 | ||
2899 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2900 | if (IS_ERR(full_path)) | |
2901 | return PTR_ERR(full_path); | |
2902 | ||
2903 | /* For DFS paths, skip the first '\' of the UNC */ | |
2904 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
2905 | ||
2906 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
2907 | &num_referrals, &referrals, | |
2908 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2909 | ||
2910 | if (!rc && num_referrals > 0) { | |
2911 | char *fake_devname = NULL; | |
2912 | ||
2913 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
2914 | full_path + 1, referrals, | |
2915 | &fake_devname); | |
2916 | ||
2917 | free_dfs_info_array(referrals, num_referrals); | |
2918 | kfree(fake_devname); | |
2919 | ||
046462ab SF |
2920 | if (cifs_sb->mountdata != NULL) |
2921 | kfree(cifs_sb->mountdata); | |
2922 | ||
dd613945 SF |
2923 | if (IS_ERR(mdata)) { |
2924 | rc = PTR_ERR(mdata); | |
2925 | mdata = NULL; | |
2926 | } | |
046462ab | 2927 | cifs_sb->mountdata = mdata; |
dd613945 SF |
2928 | } |
2929 | kfree(full_path); | |
2930 | return rc; | |
2931 | } | |
2d6d589d | 2932 | #endif |
1bfe73c2 | 2933 | |
724d9f1c PS |
2934 | int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data, |
2935 | const char *devname) | |
1da177e4 | 2936 | { |
7586b765 | 2937 | struct smb_vol *volume_info; |
724d9f1c | 2938 | int rc = 0; |
1da177e4 | 2939 | |
724d9f1c | 2940 | *pvolume_info = NULL; |
1da177e4 | 2941 | |
7586b765 JL |
2942 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2943 | if (!volume_info) { | |
2944 | rc = -ENOMEM; | |
2945 | goto out; | |
2946 | } | |
50c2f753 | 2947 | |
724d9f1c | 2948 | if (cifs_parse_mount_options(mount_data, devname, |
f14bcf71 | 2949 | volume_info)) { |
70fe7dc0 JL |
2950 | rc = -EINVAL; |
2951 | goto out; | |
1da177e4 LT |
2952 | } |
2953 | ||
7586b765 | 2954 | if (volume_info->nullauth) { |
b6b38f70 | 2955 | cFYI(1, "null user"); |
446b23a7 PS |
2956 | volume_info->username = kzalloc(1, GFP_KERNEL); |
2957 | if (volume_info->username == NULL) { | |
2958 | rc = -ENOMEM; | |
2959 | goto out; | |
2960 | } | |
7586b765 | 2961 | } else if (volume_info->username) { |
1da177e4 | 2962 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2963 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2964 | } else { |
bf820679 | 2965 | cifserror("No username specified"); |
50c2f753 SF |
2966 | /* In userspace mount helper we can get user name from alternate |
2967 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2968 | rc = -EINVAL; |
2969 | goto out; | |
1da177e4 LT |
2970 | } |
2971 | ||
1da177e4 | 2972 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2973 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2974 | /* load_nls_default cannot return null */ |
2975 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2976 | } else { |
a5fc4ce0 JL |
2977 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2978 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2979 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2980 | volume_info->iocharset); | |
70fe7dc0 JL |
2981 | rc = -ELIBACC; |
2982 | goto out; | |
1da177e4 LT |
2983 | } |
2984 | } | |
724d9f1c PS |
2985 | |
2986 | *pvolume_info = volume_info; | |
2987 | return rc; | |
2988 | out: | |
f9e59bcb | 2989 | cifs_cleanup_volume_info(volume_info); |
724d9f1c PS |
2990 | return rc; |
2991 | } | |
2992 | ||
2993 | int | |
2c6292ae | 2994 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c PS |
2995 | { |
2996 | int rc = 0; | |
2997 | int xid; | |
96daf2b0 SF |
2998 | struct cifs_ses *pSesInfo; |
2999 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3000 | struct TCP_Server_Info *srvTcp; |
3001 | char *full_path; | |
3002 | struct tcon_link *tlink; | |
3003 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3004 | int referral_walks_count = 0; | |
dd854466 AV |
3005 | |
3006 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3007 | if (rc) | |
3008 | return rc; | |
3009 | ||
3010 | cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages; | |
3011 | ||
724d9f1c PS |
3012 | try_mount_again: |
3013 | /* cleanup activities if we're chasing a referral */ | |
3014 | if (referral_walks_count) { | |
3015 | if (tcon) | |
3016 | cifs_put_tcon(tcon); | |
3017 | else if (pSesInfo) | |
3018 | cifs_put_smb_ses(pSesInfo); | |
3019 | ||
724d9f1c PS |
3020 | FreeXid(xid); |
3021 | } | |
3022 | #endif | |
3023 | tcon = NULL; | |
3024 | pSesInfo = NULL; | |
3025 | srvTcp = NULL; | |
3026 | full_path = NULL; | |
3027 | tlink = NULL; | |
3028 | ||
3029 | xid = GetXid(); | |
1da177e4 | 3030 | |
63c038c2 | 3031 | /* get a reference to a tcp session */ |
7586b765 | 3032 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3033 | if (IS_ERR(srvTcp)) { |
3034 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3035 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3036 | goto out; |
1da177e4 LT |
3037 | } |
3038 | ||
36988c76 JL |
3039 | /* get a reference to a SMB session */ |
3040 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3041 | if (IS_ERR(pSesInfo)) { | |
3042 | rc = PTR_ERR(pSesInfo); | |
3043 | pSesInfo = NULL; | |
3044 | goto mount_fail_check; | |
1da177e4 | 3045 | } |
50c2f753 | 3046 | |
d00c28de JL |
3047 | /* search for existing tcon to this server share */ |
3048 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3049 | if (IS_ERR(tcon)) { | |
3050 | rc = PTR_ERR(tcon); | |
3051 | tcon = NULL; | |
1bfe73c2 | 3052 | goto remote_path_check; |
d00c28de | 3053 | } |
1bfe73c2 | 3054 | |
d82c2df5 | 3055 | /* tell server which Unix caps we support */ |
6848b733 | 3056 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3057 | /* reset of caps checks mount to see if unix extensions |
3058 | disabled for just this mount */ | |
2c6292ae | 3059 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3060 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3061 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3062 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3063 | rc = -EACCES; | |
3064 | goto mount_fail_check; | |
3065 | } | |
3066 | } else | |
d82c2df5 | 3067 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3068 | |
6848b733 SF |
3069 | /* do not care if following two calls succeed - informational */ |
3070 | if (!tcon->ipc) { | |
3071 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3072 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3073 | } | |
3074 | ||
d82c2df5 SF |
3075 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
3076 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 3077 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 3078 | } |
d82c2df5 SF |
3079 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) |
3080 | cifs_sb->rsize = min(cifs_sb->rsize, | |
3081 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 3082 | |
f7910cbd JL |
3083 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
3084 | ||
1bfe73c2 | 3085 | remote_path_check: |
c1508ca2 SF |
3086 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3087 | /* | |
3088 | * Perform an unconditional check for whether there are DFS | |
3089 | * referrals for this path without prefix, to provide support | |
3090 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3091 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3092 | * Chase the referral if found, otherwise continue normally. | |
3093 | */ | |
3094 | if (referral_walks_count == 0) { | |
3095 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3096 | cifs_sb, false); |
c1508ca2 SF |
3097 | if (!refrc) { |
3098 | referral_walks_count++; | |
3099 | goto try_mount_again; | |
3100 | } | |
3101 | } | |
3102 | #endif | |
3103 | ||
f87d39d9 | 3104 | /* check if a whole path is not remote */ |
70945643 | 3105 | if (!rc && tcon) { |
e4cce94c | 3106 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3107 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3108 | if (full_path == NULL) { |
3109 | rc = -ENOMEM; | |
3110 | goto mount_fail_check; | |
3111 | } | |
3112 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3113 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3114 | kfree(full_path); |
3115 | goto mount_fail_check; | |
3116 | } | |
3117 | kfree(full_path); | |
3118 | } | |
3119 | ||
1bfe73c2 IM |
3120 | /* get referral if needed */ |
3121 | if (rc == -EREMOTE) { | |
d036f50f | 3122 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3123 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3124 | /* | |
3125 | * BB: when we implement proper loop detection, | |
3126 | * we will remove this check. But now we need it | |
3127 | * to prevent an indefinite loop if 'DFS tree' is | |
3128 | * misconfigured (i.e. has loops). | |
3129 | */ | |
3130 | rc = -ELOOP; | |
3131 | goto mount_fail_check; | |
3132 | } | |
1bfe73c2 | 3133 | |
dd613945 | 3134 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3135 | true); |
7b91e266 | 3136 | |
dd613945 | 3137 | if (!rc) { |
5c2503a8 | 3138 | referral_walks_count++; |
1bfe73c2 IM |
3139 | goto try_mount_again; |
3140 | } | |
dd613945 | 3141 | goto mount_fail_check; |
d036f50f SF |
3142 | #else /* No DFS support, return error on mount */ |
3143 | rc = -EOPNOTSUPP; | |
3144 | #endif | |
1bfe73c2 IM |
3145 | } |
3146 | ||
9d002df4 JL |
3147 | if (rc) |
3148 | goto mount_fail_check; | |
3149 | ||
3150 | /* now, hang the tcon off of the superblock */ | |
3151 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3152 | if (tlink == NULL) { | |
3153 | rc = -ENOMEM; | |
3154 | goto mount_fail_check; | |
3155 | } | |
3156 | ||
b647c35f | 3157 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3158 | tlink->tl_tcon = tcon; |
3159 | tlink->tl_time = jiffies; | |
3160 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3161 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3162 | ||
b647c35f | 3163 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3164 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3165 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3166 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3167 | |
2de970ff JL |
3168 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
3169 | TLINK_IDLE_EXPIRE); | |
3170 | ||
1bfe73c2 IM |
3171 | mount_fail_check: |
3172 | /* on error free sesinfo and tcon struct if needed */ | |
3173 | if (rc) { | |
1bfe73c2 | 3174 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3175 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3176 | if (tcon) |
3177 | cifs_put_tcon(tcon); | |
3178 | else if (pSesInfo) | |
3179 | cifs_put_smb_ses(pSesInfo); | |
3180 | else | |
3181 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3182 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3183 | goto out; |
3184 | } | |
3185 | ||
7586b765 | 3186 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
3187 | (in which case it is not needed anymore) but when new sesion is created |
3188 | the password ptr is put in the new session structure (in which case the | |
3189 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
3190 | out: |
3191 | /* zero out password before freeing */ | |
1da177e4 LT |
3192 | FreeXid(xid); |
3193 | return rc; | |
3194 | } | |
3195 | ||
8d1bca32 JL |
3196 | /* |
3197 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3198 | * pointer may be NULL. | |
3199 | */ | |
1da177e4 | 3200 | int |
96daf2b0 SF |
3201 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
3202 | const char *tree, struct cifs_tcon *tcon, | |
1da177e4 LT |
3203 | const struct nls_table *nls_codepage) |
3204 | { | |
3205 | struct smb_hdr *smb_buffer; | |
3206 | struct smb_hdr *smb_buffer_response; | |
3207 | TCONX_REQ *pSMB; | |
3208 | TCONX_RSP *pSMBr; | |
3209 | unsigned char *bcc_ptr; | |
3210 | int rc = 0; | |
690c522f JL |
3211 | int length; |
3212 | __u16 bytes_left, count; | |
1da177e4 LT |
3213 | |
3214 | if (ses == NULL) | |
3215 | return -EIO; | |
3216 | ||
3217 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3218 | if (smb_buffer == NULL) |
1da177e4 | 3219 | return -ENOMEM; |
ca43e3be | 3220 | |
1da177e4 LT |
3221 | smb_buffer_response = smb_buffer; |
3222 | ||
3223 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3224 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3225 | |
3226 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3227 | smb_buffer->Uid = ses->Suid; |
3228 | pSMB = (TCONX_REQ *) smb_buffer; | |
3229 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3230 | ||
3231 | pSMB->AndXCommand = 0xFF; | |
3232 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3233 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3234 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3235 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3236 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3237 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3238 | /* already aligned so no need to do it below */ |
eeac8047 | 3239 | } else { |
540b2e37 | 3240 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3241 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3242 | specified as required (when that support is added to | |
3243 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3244 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3245 | by Samba (not sure whether other servers allow |
3246 | NTLMv2 password here) */ | |
7c7b25bc | 3247 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3248 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3249 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3250 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3251 | ses->server->sec_mode & |
4e53a3fb JL |
3252 | SECMODE_PW_ENCRYPT ? true : false, |
3253 | bcc_ptr); | |
7c7b25bc SF |
3254 | else |
3255 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 SP |
3256 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
3257 | bcc_ptr); | |
eeac8047 | 3258 | |
540b2e37 | 3259 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3260 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3261 | /* must align unicode strings */ |
3262 | *bcc_ptr = 0; /* null byte password */ | |
3263 | bcc_ptr++; | |
3264 | } | |
eeac8047 | 3265 | } |
1da177e4 | 3266 | |
96daf2b0 | 3267 | if (ses->server->sec_mode & |
a878fb22 | 3268 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3269 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3270 | ||
3271 | if (ses->capabilities & CAP_STATUS32) { | |
3272 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3273 | } | |
3274 | if (ses->capabilities & CAP_DFS) { | |
3275 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3276 | } | |
3277 | if (ses->capabilities & CAP_UNICODE) { | |
3278 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3279 | length = | |
50c2f753 SF |
3280 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3281 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3282 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3283 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3284 | bcc_ptr += 2; /* skip trailing null */ |
3285 | } else { /* ASCII */ | |
1da177e4 LT |
3286 | strcpy(bcc_ptr, tree); |
3287 | bcc_ptr += strlen(tree) + 1; | |
3288 | } | |
3289 | strcpy(bcc_ptr, "?????"); | |
3290 | bcc_ptr += strlen("?????"); | |
3291 | bcc_ptr += 1; | |
3292 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3293 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3294 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3295 | pSMB->ByteCount = cpu_to_le16(count); |
3296 | ||
133672ef | 3297 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3298 | 0); |
1da177e4 | 3299 | |
1da177e4 LT |
3300 | /* above now done in SendReceive */ |
3301 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3302 | bool is_unicode; |
3303 | ||
1da177e4 | 3304 | tcon->tidStatus = CifsGood; |
3b795210 | 3305 | tcon->need_reconnect = false; |
1da177e4 LT |
3306 | tcon->tid = smb_buffer_response->Tid; |
3307 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3308 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3309 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3310 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3311 | is_unicode = true; | |
3312 | else | |
3313 | is_unicode = false; | |
3314 | ||
cc20c031 | 3315 | |
50c2f753 | 3316 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3317 | if (length == 3) { |
3318 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3319 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3320 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3321 | tcon->ipc = 1; |
3322 | } | |
3323 | } else if (length == 2) { | |
3324 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3325 | /* the most common case */ | |
b6b38f70 | 3326 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3327 | } |
3328 | } | |
50c2f753 | 3329 | bcc_ptr += length + 1; |
cc20c031 | 3330 | bytes_left -= (length + 1); |
1da177e4 | 3331 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3332 | |
3333 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3334 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3335 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3336 | bytes_left, is_unicode, |
cc20c031 JL |
3337 | nls_codepage); |
3338 | ||
b6b38f70 | 3339 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3340 | |
fb8c4b14 | 3341 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3342 | (smb_buffer_response->WordCount == 7)) |
3343 | /* field is in same location */ | |
3979877e SF |
3344 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3345 | else | |
3346 | tcon->Flags = 0; | |
b6b38f70 | 3347 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3348 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3349 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3350 | ses->ipc_tid = smb_buffer_response->Tid; |
3351 | } | |
3352 | ||
a8a11d39 | 3353 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3354 | return rc; |
3355 | } | |
3356 | ||
2a9b9951 AV |
3357 | void |
3358 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3359 | { |
b647c35f JL |
3360 | struct rb_root *root = &cifs_sb->tlink_tree; |
3361 | struct rb_node *node; | |
3362 | struct tcon_link *tlink; | |
9d002df4 | 3363 | |
2de970ff JL |
3364 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3365 | ||
b647c35f JL |
3366 | spin_lock(&cifs_sb->tlink_tree_lock); |
3367 | while ((node = rb_first(root))) { | |
3368 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3369 | cifs_get_tlink(tlink); | |
3370 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3371 | rb_erase(node, root); | |
1da177e4 | 3372 | |
b647c35f JL |
3373 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3374 | cifs_put_tlink(tlink); | |
3375 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3376 | } | |
3377 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3378 | |
dd854466 | 3379 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3380 | kfree(cifs_sb->mountdata); |
3381 | unload_nls(cifs_sb->local_nls); | |
3382 | kfree(cifs_sb); | |
50c2f753 | 3383 | } |
1da177e4 | 3384 | |
96daf2b0 | 3385 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
1da177e4 LT |
3386 | { |
3387 | int rc = 0; | |
198b5682 | 3388 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3389 | |
198b5682 JL |
3390 | /* only send once per connect */ |
3391 | if (server->maxBuf != 0) | |
3392 | return 0; | |
3393 | ||
3394 | rc = CIFSSMBNegotiate(xid, ses); | |
3395 | if (rc == -EAGAIN) { | |
3396 | /* retry only once on 1st time connection */ | |
3397 | rc = CIFSSMBNegotiate(xid, ses); | |
3398 | if (rc == -EAGAIN) | |
3399 | rc = -EHOSTDOWN; | |
1da177e4 | 3400 | } |
198b5682 JL |
3401 | if (rc == 0) { |
3402 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3403 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3404 | server->tcpStatus = CifsGood; |
3405 | else | |
3406 | rc = -EHOSTDOWN; | |
3407 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3408 | |
198b5682 JL |
3409 | } |
3410 | ||
3411 | return rc; | |
3412 | } | |
3413 | ||
3414 | ||
96daf2b0 | 3415 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
198b5682 JL |
3416 | struct nls_table *nls_info) |
3417 | { | |
3418 | int rc = 0; | |
3419 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3420 | |
198b5682 JL |
3421 | ses->flags = 0; |
3422 | ses->capabilities = server->capabilities; | |
26b994fa | 3423 | if (linuxExtEnabled == 0) |
198b5682 | 3424 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3425 | |
b6b38f70 | 3426 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 3427 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3428 | |
198b5682 | 3429 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3430 | if (rc) { |
b6b38f70 | 3431 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3432 | } else { |
5d0d2882 SP |
3433 | mutex_lock(&ses->server->srv_mutex); |
3434 | if (!server->session_estab) { | |
21e73393 | 3435 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3436 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3437 | server->sequence_number = 0x2; |
3438 | server->session_estab = true; | |
3439 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3440 | } |
3441 | mutex_unlock(&server->srv_mutex); | |
3442 | ||
b6b38f70 | 3443 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3444 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3445 | ses->status = CifsGood; |
3446 | ses->need_reconnect = false; | |
20418acd | 3447 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3448 | } |
26b994fa | 3449 | |
21e73393 SP |
3450 | kfree(ses->auth_key.response); |
3451 | ses->auth_key.response = NULL; | |
3452 | ses->auth_key.len = 0; | |
d3686d54 SP |
3453 | kfree(ses->ntlmssp); |
3454 | ses->ntlmssp = NULL; | |
21e73393 | 3455 | |
1da177e4 LT |
3456 | return rc; |
3457 | } | |
3458 | ||
96daf2b0 | 3459 | static struct cifs_tcon * |
9d002df4 JL |
3460 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3461 | { | |
96daf2b0 SF |
3462 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3463 | struct cifs_ses *ses; | |
3464 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3465 | struct smb_vol *vol_info; |
34c87901 SF |
3466 | char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */ |
3467 | /* We used to have this as MAX_USERNAME which is */ | |
3468 | /* way too big now (256 instead of 32) */ | |
9d002df4 JL |
3469 | |
3470 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3471 | if (vol_info == NULL) { | |
3472 | tcon = ERR_PTR(-ENOMEM); | |
3473 | goto out; | |
3474 | } | |
3475 | ||
3476 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3477 | vol_info->username = username; | |
3478 | vol_info->local_nls = cifs_sb->local_nls; | |
3479 | vol_info->linux_uid = fsuid; | |
3480 | vol_info->cred_uid = fsuid; | |
3481 | vol_info->UNC = master_tcon->treeName; | |
3482 | vol_info->retry = master_tcon->retry; | |
3483 | vol_info->nocase = master_tcon->nocase; | |
3484 | vol_info->local_lease = master_tcon->local_lease; | |
3485 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3486 | ||
3487 | /* FIXME: allow for other secFlg settings */ | |
3488 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3489 | ||
3490 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3491 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3492 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3493 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3494 | |
3495 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3496 | if (IS_ERR(ses)) { | |
96daf2b0 | 3497 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3498 | cifs_put_tcp_session(master_tcon->ses->server); |
3499 | goto out; | |
3500 | } | |
3501 | ||
3502 | tcon = cifs_get_tcon(ses, vol_info); | |
3503 | if (IS_ERR(tcon)) { | |
3504 | cifs_put_smb_ses(ses); | |
3505 | goto out; | |
3506 | } | |
3507 | ||
3508 | if (ses->capabilities & CAP_UNIX) | |
3509 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3510 | out: | |
3511 | kfree(vol_info); | |
3512 | ||
3513 | return tcon; | |
3514 | } | |
3515 | ||
96daf2b0 | 3516 | struct cifs_tcon * |
9d002df4 JL |
3517 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3518 | { | |
3519 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3520 | } | |
3521 | ||
3522 | static int | |
3523 | cifs_sb_tcon_pending_wait(void *unused) | |
3524 | { | |
3525 | schedule(); | |
3526 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3527 | } | |
3528 | ||
b647c35f JL |
3529 | /* find and return a tlink with given uid */ |
3530 | static struct tcon_link * | |
3531 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3532 | { | |
3533 | struct rb_node *node = root->rb_node; | |
3534 | struct tcon_link *tlink; | |
3535 | ||
3536 | while (node) { | |
3537 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3538 | ||
3539 | if (tlink->tl_uid > uid) | |
3540 | node = node->rb_left; | |
3541 | else if (tlink->tl_uid < uid) | |
3542 | node = node->rb_right; | |
3543 | else | |
3544 | return tlink; | |
3545 | } | |
3546 | return NULL; | |
3547 | } | |
3548 | ||
3549 | /* insert a tcon_link into the tree */ | |
3550 | static void | |
3551 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3552 | { | |
3553 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3554 | struct tcon_link *tlink; | |
3555 | ||
3556 | while (*new) { | |
3557 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3558 | parent = *new; | |
3559 | ||
3560 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3561 | new = &((*new)->rb_left); | |
3562 | else | |
3563 | new = &((*new)->rb_right); | |
3564 | } | |
3565 | ||
3566 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3567 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3568 | } | |
3569 | ||
9d002df4 JL |
3570 | /* |
3571 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3572 | * current task. | |
3573 | * | |
3574 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3575 | * the master tcon for the mount. | |
3576 | * | |
6ef933a3 | 3577 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3578 | * exists, then check to see if it's pending construction. If it is then wait |
3579 | * for construction to complete. Once it's no longer pending, check to see if | |
3580 | * it failed and either return an error or retry construction, depending on | |
3581 | * the timeout. | |
3582 | * | |
3583 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3584 | * try to construct a new one. | |
3585 | */ | |
3586 | struct tcon_link * | |
3587 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3588 | { | |
3589 | int ret; | |
b647c35f | 3590 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3591 | struct tcon_link *tlink, *newtlink; |
3592 | ||
3593 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3594 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3595 | ||
3596 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3597 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3598 | if (tlink) |
3599 | cifs_get_tlink(tlink); | |
3600 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3601 | ||
3602 | if (tlink == NULL) { | |
3603 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3604 | if (newtlink == NULL) | |
3605 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3606 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3607 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3608 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3609 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3610 | cifs_get_tlink(newtlink); | |
3611 | ||
9d002df4 JL |
3612 | spin_lock(&cifs_sb->tlink_tree_lock); |
3613 | /* was one inserted after previous search? */ | |
b647c35f | 3614 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3615 | if (tlink) { |
3616 | cifs_get_tlink(tlink); | |
3617 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3618 | kfree(newtlink); |
3619 | goto wait_for_construction; | |
3620 | } | |
9d002df4 | 3621 | tlink = newtlink; |
b647c35f JL |
3622 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3623 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3624 | } else { |
3625 | wait_for_construction: | |
3626 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3627 | cifs_sb_tcon_pending_wait, | |
3628 | TASK_INTERRUPTIBLE); | |
3629 | if (ret) { | |
3630 | cifs_put_tlink(tlink); | |
3631 | return ERR_PTR(ret); | |
3632 | } | |
3633 | ||
3634 | /* if it's good, return it */ | |
3635 | if (!IS_ERR(tlink->tl_tcon)) | |
3636 | return tlink; | |
3637 | ||
3638 | /* return error if we tried this already recently */ | |
3639 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3640 | cifs_put_tlink(tlink); | |
3641 | return ERR_PTR(-EACCES); | |
3642 | } | |
3643 | ||
3644 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3645 | goto wait_for_construction; | |
3646 | } | |
3647 | ||
3648 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3649 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3650 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3651 | ||
3652 | if (IS_ERR(tlink->tl_tcon)) { | |
3653 | cifs_put_tlink(tlink); | |
3654 | return ERR_PTR(-EACCES); | |
3655 | } | |
3656 | ||
3657 | return tlink; | |
3658 | } | |
2de970ff JL |
3659 | |
3660 | /* | |
3661 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3662 | * out tcons. | |
3663 | */ | |
3664 | static void | |
3665 | cifs_prune_tlinks(struct work_struct *work) | |
3666 | { | |
3667 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3668 | prune_tlinks.work); | |
b647c35f JL |
3669 | struct rb_root *root = &cifs_sb->tlink_tree; |
3670 | struct rb_node *node = rb_first(root); | |
3671 | struct rb_node *tmp; | |
3672 | struct tcon_link *tlink; | |
2de970ff | 3673 | |
b647c35f JL |
3674 | /* |
3675 | * Because we drop the spinlock in the loop in order to put the tlink | |
3676 | * it's not guarded against removal of links from the tree. The only | |
3677 | * places that remove entries from the tree are this function and | |
3678 | * umounts. Because this function is non-reentrant and is canceled | |
3679 | * before umount can proceed, this is safe. | |
3680 | */ | |
3681 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3682 | node = rb_first(root); | |
3683 | while (node != NULL) { | |
3684 | tmp = node; | |
3685 | node = rb_next(tmp); | |
3686 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3687 | ||
3688 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3689 | atomic_read(&tlink->tl_count) != 0 || | |
3690 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3691 | continue; | |
2de970ff | 3692 | |
b647c35f JL |
3693 | cifs_get_tlink(tlink); |
3694 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3695 | rb_erase(tmp, root); | |
3696 | ||
3697 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3698 | cifs_put_tlink(tlink); | |
3699 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3700 | } | |
3701 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3702 | |
3703 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3704 | TLINK_IDLE_EXPIRE); | |
3705 | } |