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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
0e2bedaa | 41 | #include <net/ipv6.h> |
1da177e4 LT |
42 | #include "cifspdu.h" |
43 | #include "cifsglob.h" | |
44 | #include "cifsproto.h" | |
45 | #include "cifs_unicode.h" | |
46 | #include "cifs_debug.h" | |
47 | #include "cifs_fs_sb.h" | |
48 | #include "ntlmssp.h" | |
49 | #include "nterr.h" | |
50 | #include "rfc1002pdu.h" | |
488f1d2d | 51 | #include "fscache.h" |
1da177e4 LT |
52 | |
53 | #define CIFS_PORT 445 | |
54 | #define RFC1001_PORT 139 | |
55 | ||
c74093b6 JL |
56 | /* SMB echo "timeout" -- FIXME: tunable? */ |
57 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
58 | ||
1da177e4 LT |
59 | extern mempool_t *cifs_req_poolp; |
60 | ||
2de970ff | 61 | /* FIXME: should these be tunable? */ |
9d002df4 | 62 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 63 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 64 | |
a9f1b85e PS |
65 | static int ip_connect(struct TCP_Server_Info *server); |
66 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 67 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 68 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
69 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
70 | const char *devname); | |
1da177e4 | 71 | |
d5c5605c JL |
72 | /* |
73 | * cifs tcp session reconnection | |
74 | * | |
75 | * mark tcp session as reconnecting so temporarily locked | |
76 | * mark all smb sessions as reconnecting for tcp session | |
77 | * reconnect tcp session | |
78 | * wake up waiters on reconnection? - (not needed currently) | |
79 | */ | |
2cd646a2 | 80 | static int |
1da177e4 LT |
81 | cifs_reconnect(struct TCP_Server_Info *server) |
82 | { | |
83 | int rc = 0; | |
f1987b44 | 84 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
85 | struct cifs_ses *ses; |
86 | struct cifs_tcon *tcon; | |
fb8c4b14 | 87 | struct mid_q_entry *mid_entry; |
3c1105df | 88 | struct list_head retry_list; |
50c2f753 | 89 | |
1da177e4 | 90 | spin_lock(&GlobalMid_Lock); |
469ee614 | 91 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 92 | /* the demux thread will exit normally |
1da177e4 LT |
93 | next time through the loop */ |
94 | spin_unlock(&GlobalMid_Lock); | |
95 | return rc; | |
96 | } else | |
97 | server->tcpStatus = CifsNeedReconnect; | |
98 | spin_unlock(&GlobalMid_Lock); | |
99 | server->maxBuf = 0; | |
100 | ||
b6b38f70 | 101 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
102 | |
103 | /* before reconnecting the tcp session, mark the smb session (uid) | |
104 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 105 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 106 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 107 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 108 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
109 | ses->need_reconnect = true; |
110 | ses->ipc_tid = 0; | |
f1987b44 | 111 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 112 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 113 | tcon->need_reconnect = true; |
1da177e4 | 114 | } |
1da177e4 | 115 | } |
3f9bcca7 | 116 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 117 | |
1da177e4 | 118 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 119 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 120 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 121 | if (server->ssocket) { |
b6b38f70 JP |
122 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
123 | server->ssocket->flags); | |
91cf45f0 | 124 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 125 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 126 | server->ssocket->state, |
b6b38f70 | 127 | server->ssocket->flags); |
1da177e4 LT |
128 | sock_release(server->ssocket); |
129 | server->ssocket = NULL; | |
130 | } | |
5d0d2882 SP |
131 | server->sequence_number = 0; |
132 | server->session_estab = false; | |
21e73393 SP |
133 | kfree(server->session_key.response); |
134 | server->session_key.response = NULL; | |
135 | server->session_key.len = 0; | |
fda35943 | 136 | server->lstrp = jiffies; |
2b84a36c | 137 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 138 | |
2b84a36c | 139 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
140 | INIT_LIST_HEAD(&retry_list); |
141 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 142 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
143 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
144 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
145 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) | |
ad8b15f0 | 146 | mid_entry->midState = MID_RETRY_NEEDED; |
3c1105df JL |
147 | list_move(&mid_entry->qhead, &retry_list); |
148 | } | |
149 | spin_unlock(&GlobalMid_Lock); | |
150 | ||
151 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
152 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
153 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
154 | list_del_init(&mid_entry->qhead); |
155 | mid_entry->callback(mid_entry); | |
1da177e4 | 156 | } |
1da177e4 | 157 | |
7fdbaa1b | 158 | do { |
6c3d8909 | 159 | try_to_freeze(); |
a9f1b85e PS |
160 | |
161 | /* we should try only the port we connected to before */ | |
162 | rc = generic_ip_connect(server); | |
fb8c4b14 | 163 | if (rc) { |
b6b38f70 | 164 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 165 | msleep(3000); |
1da177e4 LT |
166 | } else { |
167 | atomic_inc(&tcpSesReconnectCount); | |
168 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 169 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 170 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 171 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 172 | } |
7fdbaa1b | 173 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 174 | |
1da177e4 LT |
175 | return rc; |
176 | } | |
177 | ||
fb8c4b14 | 178 | /* |
e4eb295d SF |
179 | return codes: |
180 | 0 not a transact2, or all data present | |
181 | >0 transact2 with that much data missing | |
182 | -EINVAL = invalid transact2 | |
183 | ||
184 | */ | |
c974befa | 185 | static int check2ndT2(struct smb_hdr *pSMB) |
e4eb295d | 186 | { |
fb8c4b14 | 187 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 188 | int remaining; |
26ec2548 | 189 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 190 | |
fb8c4b14 | 191 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
192 | return 0; |
193 | ||
fb8c4b14 SF |
194 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
195 | /* check for parm and data offset going beyond end of smb */ | |
196 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 197 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
198 | return -EINVAL; |
199 | } | |
200 | ||
201 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
202 | ||
26ec2548 JL |
203 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
204 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 205 | |
c0c7b905 | 206 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 207 | return 0; |
c0c7b905 | 208 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
209 | cFYI(1, "total data %d smaller than data in frame %d", |
210 | total_data_size, data_in_this_rsp); | |
e4eb295d | 211 | return -EINVAL; |
e4eb295d | 212 | } |
c0c7b905 JL |
213 | |
214 | remaining = total_data_size - data_in_this_rsp; | |
215 | ||
216 | cFYI(1, "missing %d bytes from transact2, check next response", | |
217 | remaining); | |
c974befa | 218 | if (total_data_size > CIFSMaxBufSize) { |
c0c7b905 | 219 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
c974befa | 220 | total_data_size, CIFSMaxBufSize); |
c0c7b905 JL |
221 | return -EINVAL; |
222 | } | |
223 | return remaining; | |
e4eb295d SF |
224 | } |
225 | ||
fb8c4b14 | 226 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
227 | { |
228 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
229 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
fb8c4b14 SF |
230 | char *data_area_of_target; |
231 | char *data_area_of_buf2; | |
26ec2548 | 232 | int remaining; |
2a2047bc JL |
233 | unsigned int byte_count, total_in_buf; |
234 | __u16 total_data_size, total_in_buf2; | |
e4eb295d | 235 | |
26ec2548 | 236 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
e4eb295d | 237 | |
26ec2548 JL |
238 | if (total_data_size != |
239 | get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount)) | |
b6b38f70 | 240 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d | 241 | |
26ec2548 | 242 | total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d SF |
243 | |
244 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 245 | |
fb8c4b14 | 246 | if (remaining < 0) |
2a2047bc | 247 | return -EPROTO; |
e4eb295d | 248 | |
fb8c4b14 | 249 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 250 | return 0; |
50c2f753 | 251 | |
26ec2548 | 252 | total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 253 | if (remaining < total_in_buf2) { |
b6b38f70 | 254 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
255 | } |
256 | ||
257 | /* find end of first SMB data area */ | |
fb8c4b14 | 258 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 259 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d SF |
260 | /* validate target area */ |
261 | ||
26ec2548 JL |
262 | data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol + |
263 | get_unaligned_le16(&pSMB2->t2_rsp.DataOffset); | |
e4eb295d SF |
264 | |
265 | data_area_of_target += total_in_buf; | |
266 | ||
267 | /* copy second buffer into end of first buffer */ | |
e4eb295d | 268 | total_in_buf += total_in_buf2; |
2a2047bc JL |
269 | /* is the result too big for the field? */ |
270 | if (total_in_buf > USHRT_MAX) | |
271 | return -EPROTO; | |
26ec2548 | 272 | put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); |
2a2047bc JL |
273 | |
274 | /* fix up the BCC */ | |
820a803f | 275 | byte_count = get_bcc(pTargetSMB); |
e4eb295d | 276 | byte_count += total_in_buf2; |
2a2047bc JL |
277 | /* is the result too big for the field? */ |
278 | if (byte_count > USHRT_MAX) | |
279 | return -EPROTO; | |
820a803f | 280 | put_bcc(byte_count, pTargetSMB); |
e4eb295d | 281 | |
be8e3b00 | 282 | byte_count = be32_to_cpu(pTargetSMB->smb_buf_length); |
e4eb295d | 283 | byte_count += total_in_buf2; |
2a2047bc | 284 | /* don't allow buffer to overflow */ |
497728e1 | 285 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) |
2a2047bc | 286 | return -ENOBUFS; |
be8e3b00 | 287 | pTargetSMB->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 288 | |
2a2047bc JL |
289 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
290 | ||
fb8c4b14 | 291 | if (remaining == total_in_buf2) { |
b6b38f70 | 292 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
293 | return 0; /* we are done */ |
294 | } else /* more responses to go */ | |
295 | return 1; | |
e4eb295d SF |
296 | } |
297 | ||
c74093b6 JL |
298 | static void |
299 | cifs_echo_request(struct work_struct *work) | |
300 | { | |
301 | int rc; | |
302 | struct TCP_Server_Info *server = container_of(work, | |
303 | struct TCP_Server_Info, echo.work); | |
304 | ||
247ec9b4 | 305 | /* |
195291e6 JL |
306 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
307 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
308 | * we got a response recently | |
247ec9b4 | 309 | */ |
195291e6 | 310 | if (server->maxBuf == 0 || |
247ec9b4 | 311 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
312 | goto requeue_echo; |
313 | ||
314 | rc = CIFSSMBEcho(server); | |
315 | if (rc) | |
316 | cFYI(1, "Unable to send echo request to server: %s", | |
317 | server->hostname); | |
318 | ||
319 | requeue_echo: | |
320 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
321 | } | |
322 | ||
3d9c2472 | 323 | static bool |
2a37ef94 | 324 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 325 | { |
2a37ef94 JL |
326 | if (!server->bigbuf) { |
327 | server->bigbuf = (char *)cifs_buf_get(); | |
328 | if (!server->bigbuf) { | |
3d9c2472 PS |
329 | cERROR(1, "No memory for large SMB response"); |
330 | msleep(3000); | |
331 | /* retry will check if exiting */ | |
332 | return false; | |
333 | } | |
2a37ef94 | 334 | } else if (server->large_buf) { |
3d9c2472 | 335 | /* we are reusing a dirty large buf, clear its start */ |
2a37ef94 | 336 | memset(server->bigbuf, 0, sizeof(struct smb_hdr)); |
3d9c2472 PS |
337 | } |
338 | ||
2a37ef94 JL |
339 | if (!server->smallbuf) { |
340 | server->smallbuf = (char *)cifs_small_buf_get(); | |
341 | if (!server->smallbuf) { | |
3d9c2472 PS |
342 | cERROR(1, "No memory for SMB response"); |
343 | msleep(1000); | |
344 | /* retry will check if exiting */ | |
345 | return false; | |
346 | } | |
347 | /* beginning of smb buffer is cleared in our buf_get */ | |
348 | } else { | |
349 | /* if existing small buf clear beginning */ | |
2a37ef94 | 350 | memset(server->smallbuf, 0, sizeof(struct smb_hdr)); |
3d9c2472 PS |
351 | } |
352 | ||
3d9c2472 PS |
353 | return true; |
354 | } | |
355 | ||
ba749e6d JL |
356 | static bool |
357 | server_unresponsive(struct TCP_Server_Info *server) | |
358 | { | |
359 | if (echo_retries > 0 && server->tcpStatus == CifsGood && | |
360 | time_after(jiffies, server->lstrp + | |
361 | (echo_retries * SMB_ECHO_INTERVAL))) { | |
362 | cERROR(1, "Server %s has not responded in %d seconds. " | |
363 | "Reconnecting...", server->hostname, | |
364 | (echo_retries * SMB_ECHO_INTERVAL / HZ)); | |
365 | cifs_reconnect(server); | |
366 | wake_up(&server->response_q); | |
367 | return true; | |
368 | } | |
369 | ||
370 | return false; | |
371 | } | |
372 | ||
42c4dfc2 JL |
373 | /* |
374 | * kvec_array_init - clone a kvec array, and advance into it | |
375 | * @new: pointer to memory for cloned array | |
376 | * @iov: pointer to original array | |
377 | * @nr_segs: number of members in original array | |
378 | * @bytes: number of bytes to advance into the cloned array | |
379 | * | |
380 | * This function will copy the array provided in iov to a section of memory | |
381 | * and advance the specified number of bytes into the new array. It returns | |
382 | * the number of segments in the new array. "new" must be at least as big as | |
383 | * the original iov array. | |
384 | */ | |
385 | static unsigned int | |
386 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
387 | size_t bytes) | |
388 | { | |
389 | size_t base = 0; | |
390 | ||
391 | while (bytes || !iov->iov_len) { | |
392 | int copy = min(bytes, iov->iov_len); | |
393 | ||
394 | bytes -= copy; | |
395 | base += copy; | |
396 | if (iov->iov_len == base) { | |
397 | iov++; | |
398 | nr_segs--; | |
399 | base = 0; | |
400 | } | |
401 | } | |
402 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
403 | new->iov_base += base; | |
404 | new->iov_len -= base; | |
405 | return nr_segs; | |
406 | } | |
407 | ||
1041e3f9 JL |
408 | static struct kvec * |
409 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 410 | { |
1041e3f9 JL |
411 | struct kvec *new_iov; |
412 | ||
413 | if (server->iov && nr_segs <= server->nr_iov) | |
414 | return server->iov; | |
415 | ||
416 | /* not big enough -- allocate a new one and release the old */ | |
417 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
418 | if (new_iov) { | |
419 | kfree(server->iov); | |
420 | server->iov = new_iov; | |
421 | server->nr_iov = nr_segs; | |
422 | } | |
423 | return new_iov; | |
424 | } | |
425 | ||
e28bc5b1 JL |
426 | int |
427 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
428 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 429 | { |
a52c1eb7 JL |
430 | int length = 0; |
431 | int total_read; | |
42c4dfc2 | 432 | unsigned int segs; |
e831e6cf | 433 | struct msghdr smb_msg; |
42c4dfc2 JL |
434 | struct kvec *iov; |
435 | ||
1041e3f9 | 436 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
437 | if (!iov) |
438 | return -ENOMEM; | |
e7015fb1 | 439 | |
e831e6cf JL |
440 | smb_msg.msg_control = NULL; |
441 | smb_msg.msg_controllen = 0; | |
442 | ||
a52c1eb7 | 443 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
444 | try_to_freeze(); |
445 | ||
ba749e6d | 446 | if (server_unresponsive(server)) { |
a52c1eb7 | 447 | total_read = -EAGAIN; |
ba749e6d JL |
448 | break; |
449 | } | |
450 | ||
42c4dfc2 JL |
451 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
452 | ||
453 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
454 | iov, segs, to_read, 0); | |
e7015fb1 | 455 | |
e7015fb1 | 456 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 457 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
458 | break; |
459 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
460 | cifs_reconnect(server); | |
a52c1eb7 | 461 | total_read = -EAGAIN; |
e7015fb1 PS |
462 | break; |
463 | } else if (length == -ERESTARTSYS || | |
464 | length == -EAGAIN || | |
465 | length == -EINTR) { | |
466 | /* | |
467 | * Minimum sleep to prevent looping, allowing socket | |
468 | * to clear and app threads to set tcpStatus | |
469 | * CifsNeedReconnect if server hung. | |
470 | */ | |
471 | usleep_range(1000, 2000); | |
472 | length = 0; | |
a52c1eb7 | 473 | continue; |
e7015fb1 | 474 | } else if (length <= 0) { |
a52c1eb7 JL |
475 | cFYI(1, "Received no data or error: expecting %d " |
476 | "got %d", to_read, length); | |
e7015fb1 | 477 | cifs_reconnect(server); |
a52c1eb7 | 478 | total_read = -EAGAIN; |
e7015fb1 PS |
479 | break; |
480 | } | |
481 | } | |
a52c1eb7 | 482 | return total_read; |
e7015fb1 | 483 | } |
e7015fb1 | 484 | |
e28bc5b1 JL |
485 | int |
486 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
487 | unsigned int to_read) | |
42c4dfc2 JL |
488 | { |
489 | struct kvec iov; | |
490 | ||
491 | iov.iov_base = buf; | |
492 | iov.iov_len = to_read; | |
493 | ||
e28bc5b1 | 494 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
495 | } |
496 | ||
98bac62c | 497 | static bool |
fe11e4cc | 498 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 499 | { |
98bac62c PS |
500 | /* |
501 | * The first byte big endian of the length field, | |
502 | * is actually not part of the length but the type | |
503 | * with the most common, zero, as regular data. | |
504 | */ | |
fe11e4cc JL |
505 | switch (type) { |
506 | case RFC1002_SESSION_MESSAGE: | |
507 | /* Regular SMB response */ | |
508 | return true; | |
509 | case RFC1002_SESSION_KEEP_ALIVE: | |
510 | cFYI(1, "RFC 1002 session keep alive"); | |
511 | break; | |
512 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
513 | cFYI(1, "RFC 1002 positive session response"); | |
514 | break; | |
515 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
516 | /* |
517 | * We get this from Windows 98 instead of an error on | |
518 | * SMB negprot response. | |
519 | */ | |
fe11e4cc | 520 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
521 | /* give server a second to clean up */ |
522 | msleep(1000); | |
523 | /* | |
524 | * Always try 445 first on reconnect since we get NACK | |
525 | * on some if we ever connected to port 139 (the NACK | |
526 | * is since we do not begin with RFC1001 session | |
527 | * initialize frame). | |
528 | */ | |
fe11e4cc | 529 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
530 | cifs_reconnect(server); |
531 | wake_up(&server->response_q); | |
fe11e4cc JL |
532 | break; |
533 | default: | |
534 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 535 | cifs_reconnect(server); |
98bac62c PS |
536 | } |
537 | ||
fe11e4cc | 538 | return false; |
98bac62c PS |
539 | } |
540 | ||
ad69bae1 | 541 | static struct mid_q_entry * |
ea1f4502 | 542 | find_mid(struct TCP_Server_Info *server, struct smb_hdr *buf) |
ad69bae1 | 543 | { |
ea1f4502 | 544 | struct mid_q_entry *mid; |
ad69bae1 PS |
545 | |
546 | spin_lock(&GlobalMid_Lock); | |
ea1f4502 JL |
547 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
548 | if (mid->mid == buf->Mid && | |
549 | mid->midState == MID_REQUEST_SUBMITTED && | |
550 | mid->command == buf->Command) { | |
551 | spin_unlock(&GlobalMid_Lock); | |
552 | return mid; | |
ad69bae1 | 553 | } |
ea1f4502 JL |
554 | } |
555 | spin_unlock(&GlobalMid_Lock); | |
556 | return NULL; | |
557 | } | |
558 | ||
e28bc5b1 JL |
559 | void |
560 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 561 | { |
ad69bae1 | 562 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 563 | mid->when_received = jiffies; |
ad69bae1 | 564 | #endif |
ea1f4502 JL |
565 | spin_lock(&GlobalMid_Lock); |
566 | if (!malformed) | |
567 | mid->midState = MID_RESPONSE_RECEIVED; | |
568 | else | |
569 | mid->midState = MID_RESPONSE_MALFORMED; | |
570 | list_del_init(&mid->qhead); | |
ad69bae1 | 571 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 572 | } |
ad69bae1 | 573 | |
c8054ebd JL |
574 | static void |
575 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
576 | struct smb_hdr *buf, int malformed) | |
ea1f4502 | 577 | { |
ffc00e27 JL |
578 | if (malformed == 0 && check2ndT2(buf) > 0) { |
579 | mid->multiRsp = true; | |
ea1f4502 JL |
580 | if (mid->resp_buf) { |
581 | /* merge response - fix up 1st*/ | |
ffc00e27 JL |
582 | malformed = coalesce_t2(buf, mid->resp_buf); |
583 | if (malformed > 0) | |
c8054ebd | 584 | return; |
ffc00e27 | 585 | |
ea1f4502 JL |
586 | /* All parts received or packet is malformed. */ |
587 | mid->multiEnd = true; | |
c8054ebd | 588 | return dequeue_mid(mid, malformed); |
ea1f4502 | 589 | } |
2a37ef94 | 590 | if (!server->large_buf) { |
ea1f4502 JL |
591 | /*FIXME: switch to already allocated largebuf?*/ |
592 | cERROR(1, "1st trans2 resp needs bigbuf"); | |
593 | } else { | |
594 | /* Have first buffer */ | |
595 | mid->resp_buf = buf; | |
596 | mid->largeBuf = true; | |
2a37ef94 | 597 | server->bigbuf = NULL; |
ea1f4502 | 598 | } |
c8054ebd | 599 | return; |
ea1f4502 JL |
600 | } |
601 | mid->resp_buf = buf; | |
2a37ef94 JL |
602 | mid->largeBuf = server->large_buf; |
603 | /* Was previous buf put in mpx struct for multi-rsp? */ | |
604 | if (!mid->multiRsp) { | |
605 | /* smb buffer will be freed by user thread */ | |
606 | if (server->large_buf) | |
607 | server->bigbuf = NULL; | |
608 | else | |
609 | server->smallbuf = NULL; | |
610 | } | |
ffc00e27 | 611 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
612 | } |
613 | ||
762dfd10 PS |
614 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
615 | { | |
616 | int length; | |
617 | ||
618 | /* take it off the list, if it's not already */ | |
619 | spin_lock(&cifs_tcp_ses_lock); | |
620 | list_del_init(&server->tcp_ses_list); | |
621 | spin_unlock(&cifs_tcp_ses_lock); | |
622 | ||
623 | spin_lock(&GlobalMid_Lock); | |
624 | server->tcpStatus = CifsExiting; | |
625 | spin_unlock(&GlobalMid_Lock); | |
626 | wake_up_all(&server->response_q); | |
627 | ||
628 | /* | |
629 | * Check if we have blocked requests that need to free. Note that | |
630 | * cifs_max_pending is normally 50, but can be set at module install | |
631 | * time to as little as two. | |
632 | */ | |
633 | spin_lock(&GlobalMid_Lock); | |
634 | if (atomic_read(&server->inFlight) >= cifs_max_pending) | |
635 | atomic_set(&server->inFlight, cifs_max_pending - 1); | |
636 | /* | |
637 | * We do not want to set the max_pending too low or we could end up | |
638 | * with the counter going negative. | |
639 | */ | |
640 | spin_unlock(&GlobalMid_Lock); | |
641 | /* | |
642 | * Although there should not be any requests blocked on this queue it | |
643 | * can not hurt to be paranoid and try to wake up requests that may | |
644 | * haven been blocked when more than 50 at time were on the wire to the | |
645 | * same server - they now will see the session is in exit state and get | |
646 | * out of SendReceive. | |
647 | */ | |
648 | wake_up_all(&server->request_q); | |
649 | /* give those requests time to exit */ | |
650 | msleep(125); | |
651 | ||
652 | if (server->ssocket) { | |
653 | sock_release(server->ssocket); | |
654 | server->ssocket = NULL; | |
655 | } | |
656 | ||
657 | if (!list_empty(&server->pending_mid_q)) { | |
658 | struct list_head dispose_list; | |
659 | struct mid_q_entry *mid_entry; | |
660 | struct list_head *tmp, *tmp2; | |
661 | ||
662 | INIT_LIST_HEAD(&dispose_list); | |
663 | spin_lock(&GlobalMid_Lock); | |
664 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
665 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
666 | cFYI(1, "Clearing mid 0x%x", mid_entry->mid); | |
667 | mid_entry->midState = MID_SHUTDOWN; | |
668 | list_move(&mid_entry->qhead, &dispose_list); | |
669 | } | |
670 | spin_unlock(&GlobalMid_Lock); | |
671 | ||
672 | /* now walk dispose list and issue callbacks */ | |
673 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
674 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
675 | cFYI(1, "Callback mid 0x%x", mid_entry->mid); | |
676 | list_del_init(&mid_entry->qhead); | |
677 | mid_entry->callback(mid_entry); | |
678 | } | |
679 | /* 1/8th of sec is more than enough time for them to exit */ | |
680 | msleep(125); | |
681 | } | |
682 | ||
683 | if (!list_empty(&server->pending_mid_q)) { | |
684 | /* | |
685 | * mpx threads have not exited yet give them at least the smb | |
686 | * send timeout time for long ops. | |
687 | * | |
688 | * Due to delays on oplock break requests, we need to wait at | |
689 | * least 45 seconds before giving up on a request getting a | |
690 | * response and going ahead and killing cifsd. | |
691 | */ | |
692 | cFYI(1, "Wait for exit from demultiplex thread"); | |
693 | msleep(46000); | |
694 | /* | |
695 | * If threads still have not exited they are probably never | |
696 | * coming home not much else we can do but free the memory. | |
697 | */ | |
698 | } | |
699 | ||
700 | kfree(server->hostname); | |
1041e3f9 | 701 | kfree(server->iov); |
762dfd10 PS |
702 | kfree(server); |
703 | ||
704 | length = atomic_dec_return(&tcpSesAllocCount); | |
705 | if (length > 0) | |
706 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
707 | GFP_KERNEL); | |
708 | } | |
709 | ||
e9097ab4 JL |
710 | static int |
711 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
712 | { | |
713 | int length; | |
714 | char *buf = server->smallbuf; | |
715 | struct smb_hdr *smb_buffer = (struct smb_hdr *)buf; | |
716 | unsigned int pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); | |
717 | ||
718 | /* make sure this will fit in a large buffer */ | |
719 | if (pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { | |
720 | cERROR(1, "SMB response too long (%u bytes)", | |
721 | pdu_length); | |
722 | cifs_reconnect(server); | |
723 | wake_up(&server->response_q); | |
724 | return -EAGAIN; | |
725 | } | |
726 | ||
727 | /* switch to large buffer if too big for a small one */ | |
728 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
729 | server->large_buf = true; | |
730 | memcpy(server->bigbuf, server->smallbuf, server->total_read); | |
731 | buf = server->bigbuf; | |
732 | smb_buffer = (struct smb_hdr *)buf; | |
733 | } | |
734 | ||
735 | /* now read the rest */ | |
e28bc5b1 | 736 | length = cifs_read_from_socket(server, |
e9097ab4 JL |
737 | buf + sizeof(struct smb_hdr) - 1, |
738 | pdu_length - sizeof(struct smb_hdr) + 1 + 4); | |
739 | if (length < 0) | |
740 | return length; | |
741 | server->total_read += length; | |
742 | ||
743 | dump_smb(smb_buffer, server->total_read); | |
744 | ||
745 | /* | |
746 | * We know that we received enough to get to the MID as we | |
747 | * checked the pdu_length earlier. Now check to see | |
748 | * if the rest of the header is OK. We borrow the length | |
749 | * var for the rest of the loop to avoid a new stack var. | |
750 | * | |
751 | * 48 bytes is enough to display the header and a little bit | |
752 | * into the payload for debugging purposes. | |
753 | */ | |
754 | length = checkSMB(smb_buffer, smb_buffer->Mid, server->total_read); | |
755 | if (length != 0) | |
756 | cifs_dump_mem("Bad SMB: ", buf, | |
757 | min_t(unsigned int, server->total_read, 48)); | |
758 | ||
759 | if (mid) | |
760 | handle_mid(mid, server, smb_buffer, length); | |
761 | ||
762 | return length; | |
763 | } | |
764 | ||
1da177e4 | 765 | static int |
7c97c200 | 766 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
767 | { |
768 | int length; | |
7c97c200 | 769 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
770 | unsigned int pdu_length; |
771 | char *buf = NULL; | |
1da177e4 | 772 | struct smb_hdr *smb_buffer = NULL; |
1da177e4 LT |
773 | struct task_struct *task_to_wake = NULL; |
774 | struct mid_q_entry *mid_entry; | |
1da177e4 | 775 | |
1da177e4 | 776 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 777 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
778 | |
779 | length = atomic_inc_return(&tcpSesAllocCount); | |
780 | if (length > 1) | |
26f57364 SF |
781 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
782 | GFP_KERNEL); | |
1da177e4 | 783 | |
83144186 | 784 | set_freezable(); |
469ee614 | 785 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
786 | if (try_to_freeze()) |
787 | continue; | |
b8643e1b | 788 | |
2a37ef94 | 789 | if (!allocate_buffers(server)) |
3d9c2472 | 790 | continue; |
b8643e1b | 791 | |
2a37ef94 JL |
792 | server->large_buf = false; |
793 | smb_buffer = (struct smb_hdr *)server->smallbuf; | |
794 | buf = server->smallbuf; | |
f01d5e14 | 795 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 796 | |
e28bc5b1 | 797 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 798 | if (length < 0) |
1da177e4 | 799 | continue; |
2a37ef94 | 800 | server->total_read = length; |
1da177e4 | 801 | |
98bac62c PS |
802 | /* |
803 | * The right amount was read from socket - 4 bytes, | |
804 | * so we can now interpret the length field. | |
805 | */ | |
be8e3b00 | 806 | pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
70ca734a | 807 | |
fe11e4cc JL |
808 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
809 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 810 | continue; |
e4eb295d | 811 | |
89482a56 JL |
812 | /* make sure we have enough to get to the MID */ |
813 | if (pdu_length < sizeof(struct smb_hdr) - 1 - 4) { | |
814 | cERROR(1, "SMB response too short (%u bytes)", | |
815 | pdu_length); | |
816 | cifs_reconnect(server); | |
817 | wake_up(&server->response_q); | |
818 | continue; | |
e4eb295d | 819 | } |
e7015fb1 | 820 | |
89482a56 | 821 | /* read down to the MID */ |
e28bc5b1 JL |
822 | length = cifs_read_from_socket(server, buf + 4, |
823 | sizeof(struct smb_hdr) - 1 - 4); | |
89482a56 | 824 | if (length < 0) |
e4eb295d | 825 | continue; |
2a37ef94 | 826 | server->total_read += length; |
1da177e4 | 827 | |
c8054ebd | 828 | mid_entry = find_mid(server, smb_buffer); |
50c2f753 | 829 | |
44d22d84 JL |
830 | if (!mid_entry || !mid_entry->receive) |
831 | length = standard_receive3(server, mid_entry); | |
832 | else | |
833 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 834 | |
e9097ab4 | 835 | if (length < 0) |
fe11e4cc | 836 | continue; |
1da177e4 | 837 | |
e9097ab4 | 838 | if (server->large_buf) { |
2a37ef94 | 839 | buf = server->bigbuf; |
e9097ab4 | 840 | smb_buffer = (struct smb_hdr *)buf; |
e4eb295d | 841 | } |
fda35943 | 842 | |
fda35943 | 843 | server->lstrp = jiffies; |
2b84a36c | 844 | if (mid_entry != NULL) { |
2a37ef94 JL |
845 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
846 | mid_entry->callback(mid_entry); | |
ffc00e27 | 847 | } else if (!is_valid_oplock_break(smb_buffer, server)) { |
b6b38f70 | 848 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 849 | "NumMids %d", atomic_read(&midCount)); |
3d9c2472 | 850 | cifs_dump_mem("Received Data is: ", buf, |
70ca734a | 851 | sizeof(struct smb_hdr)); |
3979877e SF |
852 | #ifdef CONFIG_CIFS_DEBUG2 |
853 | cifs_dump_detail(smb_buffer); | |
854 | cifs_dump_mids(server); | |
855 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 856 | |
e4eb295d SF |
857 | } |
858 | } /* end while !EXITING */ | |
859 | ||
fd62cb7e | 860 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
861 | cifs_buf_release(server->bigbuf); |
862 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
863 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 864 | |
b1c8d2b4 | 865 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 866 | clean_demultiplex_info(server); |
50c2f753 | 867 | |
b1c8d2b4 JL |
868 | /* if server->tsk was NULL then wait for a signal before exiting */ |
869 | if (!task_to_wake) { | |
870 | set_current_state(TASK_INTERRUPTIBLE); | |
871 | while (!signal_pending(current)) { | |
872 | schedule(); | |
873 | set_current_state(TASK_INTERRUPTIBLE); | |
874 | } | |
875 | set_current_state(TASK_RUNNING); | |
876 | } | |
877 | ||
0468a2cf | 878 | module_put_and_exit(0); |
1da177e4 LT |
879 | } |
880 | ||
c359cf3c JL |
881 | /* extract the host portion of the UNC string */ |
882 | static char * | |
883 | extract_hostname(const char *unc) | |
884 | { | |
885 | const char *src; | |
886 | char *dst, *delim; | |
887 | unsigned int len; | |
888 | ||
889 | /* skip double chars at beginning of string */ | |
890 | /* BB: check validity of these bytes? */ | |
891 | src = unc + 2; | |
892 | ||
893 | /* delimiter between hostname and sharename is always '\\' now */ | |
894 | delim = strchr(src, '\\'); | |
895 | if (!delim) | |
896 | return ERR_PTR(-EINVAL); | |
897 | ||
898 | len = delim - src; | |
899 | dst = kmalloc((len + 1), GFP_KERNEL); | |
900 | if (dst == NULL) | |
901 | return ERR_PTR(-ENOMEM); | |
902 | ||
903 | memcpy(dst, src, len); | |
904 | dst[len] = '\0'; | |
905 | ||
906 | return dst; | |
907 | } | |
908 | ||
1da177e4 | 909 | static int |
b946845a | 910 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 911 | struct smb_vol *vol) |
1da177e4 | 912 | { |
4906e50b | 913 | char *value, *data, *end; |
957df453 | 914 | char *mountdata_copy = NULL, *options; |
3d3ea8e6 | 915 | int err; |
1da177e4 LT |
916 | unsigned int temp_len, i, j; |
917 | char separator[2]; | |
9b9d6b24 JL |
918 | short int override_uid = -1; |
919 | short int override_gid = -1; | |
920 | bool uid_specified = false; | |
921 | bool gid_specified = false; | |
88463999 | 922 | char *nodename = utsname()->nodename; |
1da177e4 LT |
923 | |
924 | separator[0] = ','; | |
50c2f753 | 925 | separator[1] = 0; |
1da177e4 | 926 | |
88463999 JL |
927 | /* |
928 | * does not have to be perfect mapping since field is | |
929 | * informational, only used for servers that do not support | |
930 | * port 445 and it can be overridden at mount time | |
931 | */ | |
1397f2ee JL |
932 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
933 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
934 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
935 | ||
1397f2ee | 936 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
937 | /* null target name indicates to use *SMBSERVR default called name |
938 | if we end up sending RFC1001 session initialize */ | |
939 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
940 | vol->cred_uid = current_uid(); |
941 | vol->linux_uid = current_uid(); | |
a001e5b5 | 942 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
943 | |
944 | /* default to only allowing write access to owner of the mount */ | |
945 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
946 | |
947 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
948 | /* default is always to request posix paths. */ |
949 | vol->posix_paths = 1; | |
a0c9217f JL |
950 | /* default to using server inode numbers where available */ |
951 | vol->server_ino = 1; | |
ac67055e | 952 | |
6d20e840 SJ |
953 | vol->actimeo = CIFS_DEF_ACTIMEO; |
954 | ||
b946845a SF |
955 | if (!mountdata) |
956 | goto cifs_parse_mount_err; | |
957 | ||
958 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
959 | if (!mountdata_copy) | |
960 | goto cifs_parse_mount_err; | |
1da177e4 | 961 | |
b946845a | 962 | options = mountdata_copy; |
4906e50b | 963 | end = options + strlen(options); |
50c2f753 | 964 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 965 | if (options[4] != 0) { |
1da177e4 LT |
966 | separator[0] = options[4]; |
967 | options += 5; | |
968 | } else { | |
b6b38f70 | 969 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
970 | } |
971 | } | |
3d3ea8e6 SP |
972 | vol->backupuid_specified = false; /* no backup intent for a user */ |
973 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 974 | |
1da177e4 LT |
975 | while ((data = strsep(&options, separator)) != NULL) { |
976 | if (!*data) | |
977 | continue; | |
978 | if ((value = strchr(data, '=')) != NULL) | |
979 | *value++ = '\0'; | |
980 | ||
50c2f753 SF |
981 | /* Have to parse this before we parse for "user" */ |
982 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 983 | vol->no_xattr = 0; |
50c2f753 | 984 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
985 | vol->no_xattr = 1; |
986 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 987 | if (!value) { |
1da177e4 LT |
988 | printk(KERN_WARNING |
989 | "CIFS: invalid or missing username\n"); | |
b946845a | 990 | goto cifs_parse_mount_err; |
fb8c4b14 | 991 | } else if (!*value) { |
4b952a9b SF |
992 | /* null user, ie anonymous, authentication */ |
993 | vol->nullauth = 1; | |
1da177e4 | 994 | } |
8727c8a8 SF |
995 | if (strnlen(value, MAX_USERNAME_SIZE) < |
996 | MAX_USERNAME_SIZE) { | |
b946845a SF |
997 | vol->username = kstrdup(value, GFP_KERNEL); |
998 | if (!vol->username) { | |
999 | printk(KERN_WARNING "CIFS: no memory " | |
1000 | "for username\n"); | |
1001 | goto cifs_parse_mount_err; | |
1002 | } | |
1da177e4 LT |
1003 | } else { |
1004 | printk(KERN_WARNING "CIFS: username too long\n"); | |
b946845a | 1005 | goto cifs_parse_mount_err; |
1da177e4 LT |
1006 | } |
1007 | } else if (strnicmp(data, "pass", 4) == 0) { | |
1008 | if (!value) { | |
1009 | vol->password = NULL; | |
1010 | continue; | |
fb8c4b14 | 1011 | } else if (value[0] == 0) { |
1da177e4 LT |
1012 | /* check if string begins with double comma |
1013 | since that would mean the password really | |
1014 | does start with a comma, and would not | |
1015 | indicate an empty string */ | |
fb8c4b14 | 1016 | if (value[1] != separator[0]) { |
1da177e4 LT |
1017 | vol->password = NULL; |
1018 | continue; | |
1019 | } | |
1020 | } | |
1021 | temp_len = strlen(value); | |
1022 | /* removed password length check, NTLM passwords | |
1023 | can be arbitrarily long */ | |
1024 | ||
50c2f753 | 1025 | /* if comma in password, the string will be |
1da177e4 LT |
1026 | prematurely null terminated. Commas in password are |
1027 | specified across the cifs mount interface by a double | |
1028 | comma ie ,, and a comma used as in other cases ie ',' | |
1029 | as a parameter delimiter/separator is single and due | |
1030 | to the strsep above is temporarily zeroed. */ | |
1031 | ||
1032 | /* NB: password legally can have multiple commas and | |
1033 | the only illegal character in a password is null */ | |
1034 | ||
50c2f753 | 1035 | if ((value[temp_len] == 0) && |
4906e50b | 1036 | (value + temp_len < end) && |
09d1db5c | 1037 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
1038 | /* reinsert comma */ |
1039 | value[temp_len] = separator[0]; | |
50c2f753 SF |
1040 | temp_len += 2; /* move after second comma */ |
1041 | while (value[temp_len] != 0) { | |
1da177e4 | 1042 | if (value[temp_len] == separator[0]) { |
50c2f753 | 1043 | if (value[temp_len+1] == |
09d1db5c SF |
1044 | separator[0]) { |
1045 | /* skip second comma */ | |
1046 | temp_len++; | |
50c2f753 | 1047 | } else { |
1da177e4 LT |
1048 | /* single comma indicating start |
1049 | of next parm */ | |
1050 | break; | |
1051 | } | |
1052 | } | |
1053 | temp_len++; | |
1054 | } | |
fb8c4b14 | 1055 | if (value[temp_len] == 0) { |
1da177e4 LT |
1056 | options = NULL; |
1057 | } else { | |
1058 | value[temp_len] = 0; | |
1059 | /* point option to start of next parm */ | |
1060 | options = value + temp_len + 1; | |
1061 | } | |
50c2f753 | 1062 | /* go from value to value + temp_len condensing |
1da177e4 LT |
1063 | double commas to singles. Note that this ends up |
1064 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 1065 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 1066 | if (vol->password == NULL) { |
50c2f753 SF |
1067 | printk(KERN_WARNING "CIFS: no memory " |
1068 | "for password\n"); | |
b946845a | 1069 | goto cifs_parse_mount_err; |
433dc24f | 1070 | } |
50c2f753 | 1071 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 1072 | vol->password[j] = value[i]; |
fb8c4b14 | 1073 | if (value[i] == separator[0] |
09d1db5c | 1074 | && value[i+1] == separator[0]) { |
1da177e4 LT |
1075 | /* skip second comma */ |
1076 | i++; | |
1077 | } | |
1078 | } | |
1079 | vol->password[j] = 0; | |
1080 | } else { | |
e915fc49 | 1081 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 1082 | if (vol->password == NULL) { |
50c2f753 SF |
1083 | printk(KERN_WARNING "CIFS: no memory " |
1084 | "for password\n"); | |
b946845a | 1085 | goto cifs_parse_mount_err; |
433dc24f | 1086 | } |
1da177e4 LT |
1087 | strcpy(vol->password, value); |
1088 | } | |
58f7f68f JL |
1089 | } else if (!strnicmp(data, "ip", 2) || |
1090 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
1091 | if (!value || !*value) { |
1092 | vol->UNCip = NULL; | |
50b64e3b JL |
1093 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
1094 | INET6_ADDRSTRLEN) { | |
b946845a SF |
1095 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
1096 | if (!vol->UNCip) { | |
1097 | printk(KERN_WARNING "CIFS: no memory " | |
1098 | "for UNC IP\n"); | |
1099 | goto cifs_parse_mount_err; | |
1100 | } | |
1da177e4 | 1101 | } else { |
50c2f753 SF |
1102 | printk(KERN_WARNING "CIFS: ip address " |
1103 | "too long\n"); | |
b946845a | 1104 | goto cifs_parse_mount_err; |
1da177e4 | 1105 | } |
50c2f753 SF |
1106 | } else if (strnicmp(data, "sec", 3) == 0) { |
1107 | if (!value || !*value) { | |
b6b38f70 | 1108 | cERROR(1, "no security value specified"); |
50c2f753 SF |
1109 | continue; |
1110 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
1111 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 1112 | CIFSSEC_MUST_SIGN; |
bf820679 | 1113 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
1114 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
1115 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 1116 | cERROR(1, "Krb5 cifs privacy not supported"); |
b946845a | 1117 | goto cifs_parse_mount_err; |
bf820679 | 1118 | } else if (strnicmp(value, "krb5", 4) == 0) { |
750d1151 | 1119 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
1120 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
1121 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1122 | CIFSSEC_MUST_SIGN; | |
1123 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1124 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1125 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1126 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1127 | CIFSSEC_MUST_SIGN; |
bf820679 | 1128 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1129 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1130 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1131 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1132 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1133 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1134 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1135 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1136 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1137 | /* BB is there a better way to do this? */ |
750d1151 | 1138 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1139 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1140 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1141 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1142 | #endif |
bf820679 | 1143 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1144 | vol->nullauth = 1; |
50c2f753 | 1145 | } else { |
b6b38f70 | 1146 | cERROR(1, "bad security option: %s", value); |
b946845a | 1147 | goto cifs_parse_mount_err; |
50c2f753 | 1148 | } |
1cb06d0b SF |
1149 | } else if (strnicmp(data, "vers", 3) == 0) { |
1150 | if (!value || !*value) { | |
1151 | cERROR(1, "no protocol version specified" | |
1152 | " after vers= mount option"); | |
1153 | } else if ((strnicmp(value, "cifs", 4) == 0) || | |
1154 | (strnicmp(value, "1", 1) == 0)) { | |
1155 | /* this is the default */ | |
1156 | continue; | |
1cb06d0b | 1157 | } |
1da177e4 LT |
1158 | } else if ((strnicmp(data, "unc", 3) == 0) |
1159 | || (strnicmp(data, "target", 6) == 0) | |
1160 | || (strnicmp(data, "path", 4) == 0)) { | |
1161 | if (!value || !*value) { | |
50c2f753 SF |
1162 | printk(KERN_WARNING "CIFS: invalid path to " |
1163 | "network resource\n"); | |
b946845a | 1164 | goto cifs_parse_mount_err; |
1da177e4 LT |
1165 | } |
1166 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1167 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1168 | if (vol->UNC == NULL) |
b946845a | 1169 | goto cifs_parse_mount_err; |
50c2f753 | 1170 | strcpy(vol->UNC, value); |
1da177e4 LT |
1171 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1172 | vol->UNC[0] = '\\'; | |
1173 | vol->UNC[1] = '\\'; | |
50c2f753 | 1174 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1175 | printk(KERN_WARNING |
50c2f753 SF |
1176 | "CIFS: UNC Path does not begin " |
1177 | "with // or \\\\ \n"); | |
b946845a | 1178 | goto cifs_parse_mount_err; |
1da177e4 LT |
1179 | } |
1180 | } else { | |
1181 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1182 | goto cifs_parse_mount_err; |
1da177e4 LT |
1183 | } |
1184 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1185 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1186 | if (!value || !*value) { | |
1187 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
b946845a | 1188 | goto cifs_parse_mount_err; |
1da177e4 LT |
1189 | } |
1190 | /* BB are there cases in which a comma can be valid in | |
1191 | a domain name and need special handling? */ | |
3979877e | 1192 | if (strnlen(value, 256) < 256) { |
b946845a SF |
1193 | vol->domainname = kstrdup(value, GFP_KERNEL); |
1194 | if (!vol->domainname) { | |
1195 | printk(KERN_WARNING "CIFS: no memory " | |
1196 | "for domainname\n"); | |
1197 | goto cifs_parse_mount_err; | |
1198 | } | |
b6b38f70 | 1199 | cFYI(1, "Domain name set"); |
1da177e4 | 1200 | } else { |
50c2f753 SF |
1201 | printk(KERN_WARNING "CIFS: domain name too " |
1202 | "long\n"); | |
b946845a | 1203 | goto cifs_parse_mount_err; |
1da177e4 | 1204 | } |
3eb9a889 BG |
1205 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1206 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1207 | ||
1208 | if (!value || !*value) { | |
1209 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1210 | " not specified.\n"); | |
b946845a | 1211 | goto cifs_parse_mount_err; |
3eb9a889 BG |
1212 | } |
1213 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1214 | value, strlen(value)); | |
b235f371 | 1215 | if (i == 0) { |
3eb9a889 BG |
1216 | printk(KERN_WARNING "CIFS: Could not parse" |
1217 | " srcaddr: %s\n", | |
1218 | value); | |
b946845a | 1219 | goto cifs_parse_mount_err; |
3eb9a889 | 1220 | } |
50c2f753 SF |
1221 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1222 | if (!value || !*value) { | |
1223 | printk(KERN_WARNING | |
1224 | "CIFS: invalid path prefix\n"); | |
b946845a | 1225 | goto cifs_parse_mount_err; |
50c2f753 SF |
1226 | } |
1227 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1228 | if (value[0] != '/') |
2fe87f02 | 1229 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1230 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1231 | if (vol->prepath == NULL) | |
b946845a | 1232 | goto cifs_parse_mount_err; |
4523cc30 | 1233 | if (value[0] != '/') { |
2fe87f02 | 1234 | vol->prepath[0] = '/'; |
50c2f753 | 1235 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1236 | } else |
50c2f753 | 1237 | strcpy(vol->prepath, value); |
b6b38f70 | 1238 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1239 | } else { |
1240 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
b946845a | 1241 | goto cifs_parse_mount_err; |
50c2f753 | 1242 | } |
1da177e4 LT |
1243 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1244 | if (!value || !*value) { | |
63135e08 SF |
1245 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1246 | "specified\n"); | |
b946845a | 1247 | goto cifs_parse_mount_err; |
1da177e4 LT |
1248 | } |
1249 | if (strnlen(value, 65) < 65) { | |
b946845a SF |
1250 | if (strnicmp(value, "default", 7)) { |
1251 | vol->iocharset = kstrdup(value, | |
1252 | GFP_KERNEL); | |
1253 | ||
1254 | if (!vol->iocharset) { | |
1255 | printk(KERN_WARNING "CIFS: no " | |
1256 | "memory for" | |
1257 | "charset\n"); | |
1258 | goto cifs_parse_mount_err; | |
1259 | } | |
1260 | } | |
50c2f753 SF |
1261 | /* if iocharset not set then load_nls_default |
1262 | is used by caller */ | |
b6b38f70 | 1263 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1264 | } else { |
63135e08 SF |
1265 | printk(KERN_WARNING "CIFS: iocharset name " |
1266 | "too long.\n"); | |
b946845a | 1267 | goto cifs_parse_mount_err; |
1da177e4 | 1268 | } |
9b9d6b24 JL |
1269 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1270 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1271 | uid_specified = true; | |
bd763319 JL |
1272 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1273 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1274 | } else if (!strnicmp(data, "forceuid", 8)) { |
1275 | override_uid = 1; | |
1276 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1277 | override_uid = 0; | |
1278 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1279 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1280 | gid_specified = true; | |
1281 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1282 | override_gid = 1; | |
1283 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1284 | override_gid = 0; | |
1da177e4 LT |
1285 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1286 | if (value && *value) { | |
1287 | vol->file_mode = | |
1288 | simple_strtoul(value, &value, 0); | |
1289 | } | |
1290 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1291 | if (value && *value) { | |
1292 | vol->dir_mode = | |
1293 | simple_strtoul(value, &value, 0); | |
1294 | } | |
1295 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1296 | if (value && *value) { | |
1297 | vol->dir_mode = | |
1298 | simple_strtoul(value, &value, 0); | |
1299 | } | |
1300 | } else if (strnicmp(data, "port", 4) == 0) { | |
1301 | if (value && *value) { | |
1302 | vol->port = | |
1303 | simple_strtoul(value, &value, 0); | |
1304 | } | |
1305 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1306 | if (value && *value) { | |
1307 | vol->rsize = | |
1308 | simple_strtoul(value, &value, 0); | |
1309 | } | |
1310 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1311 | if (value && *value) { | |
1312 | vol->wsize = | |
1313 | simple_strtoul(value, &value, 0); | |
1314 | } | |
1315 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1316 | if (!value || !*value) { |
b6b38f70 | 1317 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1318 | continue; |
1319 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1320 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1321 | } |
1322 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1323 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1324 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1325 | } else { |
1397f2ee JL |
1326 | memset(vol->source_rfc1001_name, 0x20, |
1327 | RFC1001_NAME_LEN); | |
1328 | /* | |
1329 | * FIXME: are there cases in which a comma can | |
1330 | * be valid in workstation netbios name (and | |
1331 | * need special handling)? | |
1332 | */ | |
1333 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1334 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1335 | if (value[i] == 0) |
1da177e4 | 1336 | break; |
1397f2ee | 1337 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1338 | } |
1339 | /* The string has 16th byte zero still from | |
1340 | set at top of the function */ | |
1397f2ee | 1341 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1342 | printk(KERN_WARNING "CIFS: netbiosname" |
1343 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1344 | } |
1345 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1346 | /* servernetbiosname specified override *SMBSERVER */ | |
1347 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1348 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1349 | } else { |
1350 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1351 | memset(vol->target_rfc1001_name, 0x20, |
1352 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1353 | |
50c2f753 | 1354 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1355 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1356 | valid in this workstation netbios name |
1357 | (and need special handling)? */ | |
a10faeb2 | 1358 | |
50c2f753 SF |
1359 | /* user or mount helper must uppercase |
1360 | the netbiosname */ | |
1361 | if (value[i] == 0) | |
a10faeb2 SF |
1362 | break; |
1363 | else | |
50c2f753 SF |
1364 | vol->target_rfc1001_name[i] = |
1365 | value[i]; | |
a10faeb2 SF |
1366 | } |
1367 | /* The string has 16th byte zero still from | |
1368 | set at top of the function */ | |
1397f2ee | 1369 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1370 | printk(KERN_WARNING "CIFS: server net" |
1371 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1372 | } |
6d20e840 SJ |
1373 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1374 | if (value && *value) { | |
1375 | vol->actimeo = HZ * simple_strtoul(value, | |
1376 | &value, 0); | |
1377 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1378 | cERROR(1, "CIFS: attribute cache" | |
1379 | "timeout too large"); | |
b946845a | 1380 | goto cifs_parse_mount_err; |
6d20e840 SJ |
1381 | } |
1382 | } | |
1da177e4 LT |
1383 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1384 | /* ignore */ | |
1385 | } else if (strnicmp(data, "version", 3) == 0) { | |
1386 | /* ignore */ | |
50c2f753 | 1387 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1388 | /* ignore */ |
c9c7fa00 | 1389 | } else if (strnicmp(data, "rw", 2) == 0 && strlen(data) == 2) { |
71a394fa SF |
1390 | /* ignore */ |
1391 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1392 | /* ignore */ | |
edf1ae40 SF |
1393 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1394 | vol->noblocksnd = 1; | |
1395 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1396 | vol->noautotune = 1; | |
1da177e4 LT |
1397 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1398 | (strnicmp(data, "nosuid", 6) == 0) || | |
1399 | (strnicmp(data, "exec", 4) == 0) || | |
1400 | (strnicmp(data, "noexec", 6) == 0) || | |
1401 | (strnicmp(data, "nodev", 5) == 0) || | |
1402 | (strnicmp(data, "noauto", 6) == 0) || | |
1403 | (strnicmp(data, "dev", 3) == 0)) { | |
1404 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1405 | uses these opts to set flags, and the flags are read |
1406 | by the kernel vfs layer before we get here (ie | |
1407 | before read super) so there is no point trying to | |
1408 | parse these options again and set anything and it | |
1409 | is ok to just ignore them */ | |
1da177e4 | 1410 | continue; |
1da177e4 LT |
1411 | } else if (strnicmp(data, "hard", 4) == 0) { |
1412 | vol->retry = 1; | |
1413 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1414 | vol->retry = 0; | |
1415 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1416 | vol->noperm = 0; | |
1417 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1418 | vol->noperm = 1; | |
6a0b4824 SF |
1419 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1420 | vol->remap = 1; | |
1421 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1422 | vol->remap = 0; | |
50c2f753 SF |
1423 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1424 | vol->sfu_emul = 1; | |
1425 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1426 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1427 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1428 | vol->nodfs = 1; | |
ac67055e JA |
1429 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1430 | vol->posix_paths = 1; | |
1431 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1432 | vol->posix_paths = 0; | |
c18c842b SF |
1433 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1434 | vol->no_linux_ext = 1; | |
1435 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1436 | vol->no_linux_ext = 1; | |
50c2f753 | 1437 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1438 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1439 | vol->nocase = 1; |
f636a348 JL |
1440 | } else if (strnicmp(data, "mand", 4) == 0) { |
1441 | /* ignore */ | |
1442 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1443 | /* ignore */ | |
1444 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1445 | /* ignore */ | |
c46fa8ac SF |
1446 | } else if (strnicmp(data, "brl", 3) == 0) { |
1447 | vol->nobrl = 0; | |
50c2f753 | 1448 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1449 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1450 | vol->nobrl = 1; |
d3485d37 SF |
1451 | /* turn off mandatory locking in mode |
1452 | if remote locking is turned off since the | |
1453 | local vfs will do advisory */ | |
50c2f753 SF |
1454 | if (vol->file_mode == |
1455 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1456 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1457 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1458 | /* will take the shorter form "forcemand" as well */ | |
1459 | /* This mount option will force use of mandatory | |
1460 | (DOS/Windows style) byte range locks, instead of | |
1461 | using posix advisory byte range locks, even if the | |
1462 | Unix extensions are available and posix locks would | |
1463 | be supported otherwise. If Unix extensions are not | |
1464 | negotiated this has no effect since mandatory locks | |
1465 | would be used (mandatory locks is all that those | |
1466 | those servers support) */ | |
1467 | vol->mand_lock = 1; | |
1da177e4 LT |
1468 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1469 | vol->setuids = 1; | |
1470 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1471 | vol->setuids = 0; | |
d0a9c078 JL |
1472 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1473 | vol->dynperm = true; | |
1474 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1475 | vol->dynperm = false; | |
1da177e4 LT |
1476 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1477 | vol->retry = 0; | |
1478 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1479 | vol->retry = 1; | |
1480 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1481 | vol->intr = 0; | |
1482 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1483 | vol->intr = 1; | |
be652445 SF |
1484 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1485 | vol->nostrictsync = 1; | |
1486 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1487 | vol->nostrictsync = 0; | |
50c2f753 | 1488 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1489 | vol->server_ino = 1; |
50c2f753 | 1490 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1491 | vol->server_ino = 0; |
c9c7fa00 | 1492 | } else if (strnicmp(data, "rwpidforward", 12) == 0) { |
d4ffff1f | 1493 | vol->rwpidforward = 1; |
50c2f753 | 1494 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1495 | vol->cifs_acl = 1; |
1496 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1497 | vol->cifs_acl = 0; | |
50c2f753 | 1498 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1499 | vol->no_psx_acl = 0; |
50c2f753 | 1500 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1501 | vol->no_psx_acl = 1; |
84210e91 SF |
1502 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1503 | vol->local_lease = 1; | |
50c2f753 | 1504 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1505 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1506 | } else if (strnicmp(data, "seal", 4) == 0) { |
1507 | /* we do not do the following in secFlags because seal | |
1508 | is a per tree connection (mount) not a per socket | |
1509 | or per-smb connection option in the protocol */ | |
1510 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1511 | vol->seal = 1; | |
50c2f753 | 1512 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1513 | vol->direct_io = 1; |
50c2f753 | 1514 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1515 | vol->direct_io = 1; |
d39454ff PS |
1516 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1517 | vol->strict_io = 1; | |
1da177e4 | 1518 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1519 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1520 | "supported. Instead set " | |
1521 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1522 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d | 1523 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1524 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1525 | "kernel config option set"); |
b946845a | 1526 | goto cifs_parse_mount_err; |
607a569d | 1527 | #endif |
fa1df75d | 1528 | vol->fsc = true; |
736a3320 SM |
1529 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1530 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1531 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1532 | vol->multiuser = true; | |
3d3ea8e6 SP |
1533 | } else if (!strnicmp(data, "backupuid", 9) && value && *value) { |
1534 | err = kstrtouint(value, 0, &vol->backupuid); | |
1535 | if (err < 0) { | |
1536 | cERROR(1, "%s: Invalid backupuid value", | |
1537 | __func__); | |
1538 | goto cifs_parse_mount_err; | |
1539 | } | |
1540 | vol->backupuid_specified = true; | |
1541 | } else if (!strnicmp(data, "backupgid", 9) && value && *value) { | |
1542 | err = kstrtouint(value, 0, &vol->backupgid); | |
1543 | if (err < 0) { | |
1544 | cERROR(1, "%s: Invalid backupgid value", | |
1545 | __func__); | |
1546 | goto cifs_parse_mount_err; | |
1547 | } | |
1548 | vol->backupgid_specified = true; | |
1da177e4 | 1549 | } else |
50c2f753 SF |
1550 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1551 | data); | |
1da177e4 LT |
1552 | } |
1553 | if (vol->UNC == NULL) { | |
4523cc30 | 1554 | if (devname == NULL) { |
50c2f753 SF |
1555 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1556 | "target\n"); | |
b946845a | 1557 | goto cifs_parse_mount_err; |
1da177e4 LT |
1558 | } |
1559 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1560 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1561 | if (vol->UNC == NULL) |
b946845a | 1562 | goto cifs_parse_mount_err; |
50c2f753 | 1563 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1564 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1565 | vol->UNC[0] = '\\'; | |
1566 | vol->UNC[1] = '\\'; | |
1567 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1568 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1569 | "begin with // or \\\\ \n"); | |
b946845a | 1570 | goto cifs_parse_mount_err; |
1da177e4 | 1571 | } |
7c5e628f IM |
1572 | value = strpbrk(vol->UNC+2, "/\\"); |
1573 | if (value) | |
1574 | *value = '\\'; | |
1da177e4 LT |
1575 | } else { |
1576 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1577 | goto cifs_parse_mount_err; |
1da177e4 LT |
1578 | } |
1579 | } | |
0eb8a132 JL |
1580 | |
1581 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1582 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1583 | "authentication!"); | |
b946845a | 1584 | goto cifs_parse_mount_err; |
0eb8a132 JL |
1585 | } |
1586 | ||
fb8c4b14 | 1587 | if (vol->UNCip == NULL) |
1da177e4 LT |
1588 | vol->UNCip = &vol->UNC[2]; |
1589 | ||
9b9d6b24 JL |
1590 | if (uid_specified) |
1591 | vol->override_uid = override_uid; | |
1592 | else if (override_uid == 1) | |
1593 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1594 | "specified with no uid= option.\n"); | |
1595 | ||
1596 | if (gid_specified) | |
1597 | vol->override_gid = override_gid; | |
1598 | else if (override_gid == 1) | |
1599 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1600 | "specified with no gid= option.\n"); | |
1601 | ||
b946845a | 1602 | kfree(mountdata_copy); |
1da177e4 | 1603 | return 0; |
b946845a SF |
1604 | |
1605 | cifs_parse_mount_err: | |
1606 | kfree(mountdata_copy); | |
1607 | return 1; | |
1da177e4 LT |
1608 | } |
1609 | ||
3eb9a889 BG |
1610 | /** Returns true if srcaddr isn't specified and rhs isn't |
1611 | * specified, or if srcaddr is specified and | |
1612 | * matches the IP address of the rhs argument. | |
1613 | */ | |
1614 | static bool | |
1615 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1616 | { | |
1617 | switch (srcaddr->sa_family) { | |
1618 | case AF_UNSPEC: | |
1619 | return (rhs->sa_family == AF_UNSPEC); | |
1620 | case AF_INET: { | |
1621 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1622 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1623 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1624 | } | |
1625 | case AF_INET6: { | |
1626 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1627 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1628 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1629 | } | |
1630 | default: | |
1631 | WARN_ON(1); | |
1632 | return false; /* don't expect to be here */ | |
1633 | } | |
1634 | } | |
1635 | ||
4b886136 PS |
1636 | /* |
1637 | * If no port is specified in addr structure, we try to match with 445 port | |
1638 | * and if it fails - with 139 ports. It should be called only if address | |
1639 | * families of server and addr are equal. | |
1640 | */ | |
1641 | static bool | |
1642 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1643 | { | |
6da97910 | 1644 | __be16 port, *sport; |
4b886136 PS |
1645 | |
1646 | switch (addr->sa_family) { | |
1647 | case AF_INET: | |
1648 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1649 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1650 | break; | |
1651 | case AF_INET6: | |
1652 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1653 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1654 | break; | |
1655 | default: | |
1656 | WARN_ON(1); | |
1657 | return false; | |
1658 | } | |
1659 | ||
1660 | if (!port) { | |
1661 | port = htons(CIFS_PORT); | |
1662 | if (port == *sport) | |
1663 | return true; | |
1664 | ||
1665 | port = htons(RFC1001_PORT); | |
1666 | } | |
1667 | ||
1668 | return port == *sport; | |
1669 | } | |
3eb9a889 | 1670 | |
4515148e | 1671 | static bool |
3eb9a889 BG |
1672 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1673 | struct sockaddr *srcaddr) | |
4515148e | 1674 | { |
4515148e | 1675 | switch (addr->sa_family) { |
a9f1b85e PS |
1676 | case AF_INET: { |
1677 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1678 | struct sockaddr_in *srv_addr4 = | |
1679 | (struct sockaddr_in *)&server->dstaddr; | |
1680 | ||
1681 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1682 | return false; |
4515148e | 1683 | break; |
a9f1b85e PS |
1684 | } |
1685 | case AF_INET6: { | |
1686 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1687 | struct sockaddr_in6 *srv_addr6 = | |
1688 | (struct sockaddr_in6 *)&server->dstaddr; | |
1689 | ||
4515148e | 1690 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1691 | &srv_addr6->sin6_addr)) |
4515148e | 1692 | return false; |
a9f1b85e | 1693 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1694 | return false; |
4515148e JL |
1695 | break; |
1696 | } | |
a9f1b85e PS |
1697 | default: |
1698 | WARN_ON(1); | |
1699 | return false; /* don't expect to be here */ | |
1700 | } | |
4515148e | 1701 | |
3eb9a889 BG |
1702 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1703 | return false; | |
1704 | ||
4515148e JL |
1705 | return true; |
1706 | } | |
1707 | ||
daf5b0b6 JL |
1708 | static bool |
1709 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1710 | { | |
1711 | unsigned int secFlags; | |
1712 | ||
1713 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1714 | secFlags = vol->secFlg; | |
1715 | else | |
1716 | secFlags = global_secflags | vol->secFlg; | |
1717 | ||
1718 | switch (server->secType) { | |
1719 | case LANMAN: | |
1720 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1721 | return false; | |
1722 | break; | |
1723 | case NTLMv2: | |
1724 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1725 | return false; | |
1726 | break; | |
1727 | case NTLM: | |
1728 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1729 | return false; | |
1730 | break; | |
1731 | case Kerberos: | |
1732 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1733 | return false; | |
1734 | break; | |
1735 | case RawNTLMSSP: | |
1736 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1737 | return false; | |
1738 | break; | |
1739 | default: | |
1740 | /* shouldn't happen */ | |
1741 | return false; | |
1742 | } | |
1743 | ||
25985edc | 1744 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 1745 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 1746 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
1747 | return false; |
1748 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 1749 | (server->sec_mode & |
daf5b0b6 JL |
1750 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
1751 | return false; | |
1752 | ||
1753 | return true; | |
1754 | } | |
1755 | ||
37bb04e5 PS |
1756 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1757 | struct smb_vol *vol) | |
1758 | { | |
1759 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
1760 | return 0; | |
1761 | ||
1762 | if (!match_address(server, addr, | |
1763 | (struct sockaddr *)&vol->srcaddr)) | |
1764 | return 0; | |
1765 | ||
1766 | if (!match_port(server, addr)) | |
1767 | return 0; | |
1768 | ||
1769 | if (!match_security(server, vol)) | |
1770 | return 0; | |
1771 | ||
1772 | return 1; | |
1773 | } | |
1774 | ||
e7ddee90 | 1775 | static struct TCP_Server_Info * |
daf5b0b6 | 1776 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1777 | { |
e7ddee90 | 1778 | struct TCP_Server_Info *server; |
e7ddee90 | 1779 | |
3f9bcca7 | 1780 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1781 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 1782 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
1783 | continue; |
1784 | ||
e7ddee90 | 1785 | ++server->srv_count; |
3f9bcca7 | 1786 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1787 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1788 | return server; |
1da177e4 | 1789 | } |
3f9bcca7 | 1790 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1791 | return NULL; |
1792 | } | |
1b20d672 | 1793 | |
14fbf50d | 1794 | static void |
e7ddee90 | 1795 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1796 | { |
e7ddee90 | 1797 | struct task_struct *task; |
1b20d672 | 1798 | |
3f9bcca7 | 1799 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1800 | if (--server->srv_count > 0) { |
3f9bcca7 | 1801 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1802 | return; |
1da177e4 | 1803 | } |
1b20d672 | 1804 | |
f1d0c998 RL |
1805 | put_net(cifs_net_ns(server)); |
1806 | ||
e7ddee90 | 1807 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1808 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1809 | |
c74093b6 JL |
1810 | cancel_delayed_work_sync(&server->echo); |
1811 | ||
e7ddee90 JL |
1812 | spin_lock(&GlobalMid_Lock); |
1813 | server->tcpStatus = CifsExiting; | |
1814 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1815 | |
d2b91521 | 1816 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1817 | cifs_fscache_release_client_cookie(server); |
1818 | ||
21e73393 SP |
1819 | kfree(server->session_key.response); |
1820 | server->session_key.response = NULL; | |
1821 | server->session_key.len = 0; | |
1822 | ||
e7ddee90 JL |
1823 | task = xchg(&server->tsk, NULL); |
1824 | if (task) | |
1825 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1826 | } |
1827 | ||
63c038c2 JL |
1828 | static struct TCP_Server_Info * |
1829 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1830 | { | |
1831 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1832 | struct sockaddr_storage addr; |
63c038c2 JL |
1833 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1834 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1835 | int rc; | |
1836 | ||
a9ac49d3 | 1837 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1838 | |
b6b38f70 | 1839 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1840 | |
1e68b2b2 | 1841 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1842 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1843 | volume_info->UNCip, | |
67b7626a | 1844 | strlen(volume_info->UNCip), |
50d97160 | 1845 | volume_info->port); |
1e68b2b2 | 1846 | if (!rc) { |
63c038c2 JL |
1847 | /* we failed translating address */ |
1848 | rc = -EINVAL; | |
1849 | goto out_err; | |
1850 | } | |
63c038c2 JL |
1851 | } else if (volume_info->UNCip) { |
1852 | /* BB using ip addr as tcp_ses name to connect to the | |
1853 | DFS root below */ | |
b6b38f70 | 1854 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1855 | rc = -EINVAL; |
1856 | goto out_err; | |
1857 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1858 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1859 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1860 | rc = -EINVAL; |
1861 | goto out_err; | |
1862 | } | |
1863 | ||
1864 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1865 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1866 | if (tcp_ses) |
1867 | return tcp_ses; | |
1868 | ||
1869 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1870 | if (!tcp_ses) { | |
1871 | rc = -ENOMEM; | |
1872 | goto out_err; | |
1873 | } | |
1874 | ||
d2b91521 SP |
1875 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1876 | if (rc) { | |
1877 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1878 | goto out_err; | |
1879 | } | |
1880 | ||
f1d0c998 | 1881 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1882 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1883 | if (IS_ERR(tcp_ses->hostname)) { | |
1884 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1885 | goto out_err_crypto_release; |
63c038c2 JL |
1886 | } |
1887 | ||
1888 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1889 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1890 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1891 | atomic_set(&tcp_ses->inFlight, 0); |
1892 | init_waitqueue_head(&tcp_ses->response_q); | |
1893 | init_waitqueue_head(&tcp_ses->request_q); | |
1894 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1895 | mutex_init(&tcp_ses->srv_mutex); | |
1896 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1897 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1898 | memcpy(tcp_ses->server_RFC1001_name, | |
1899 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1900 | tcp_ses->session_estab = false; |
63c038c2 | 1901 | tcp_ses->sequence_number = 0; |
fda35943 | 1902 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1903 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1904 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1905 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1906 | |
1907 | /* | |
1908 | * at this point we are the only ones with the pointer | |
1909 | * to the struct since the kernel thread not created yet | |
1910 | * no need to spinlock this init of tcpStatus or srv_count | |
1911 | */ | |
1912 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1913 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1914 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1915 | ++tcp_ses->srv_count; |
1916 | ||
a9ac49d3 | 1917 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1918 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1919 | /* BB should we allow ipv6 on port 139? */ |
1920 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1921 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1922 | sizeof(struct sockaddr_in6)); | |
1923 | } else | |
1924 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1925 | sizeof(struct sockaddr_in)); | |
1926 | ||
1927 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1928 | if (rc < 0) { |
b6b38f70 | 1929 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1930 | goto out_err_crypto_release; |
63c038c2 JL |
1931 | } |
1932 | ||
1933 | /* | |
1934 | * since we're in a cifs function already, we know that | |
1935 | * this will succeed. No need for try_module_get(). | |
1936 | */ | |
1937 | __module_get(THIS_MODULE); | |
7c97c200 | 1938 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
1939 | tcp_ses, "cifsd"); |
1940 | if (IS_ERR(tcp_ses->tsk)) { | |
1941 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1942 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1943 | module_put(THIS_MODULE); |
f7c5445a | 1944 | goto out_err_crypto_release; |
63c038c2 | 1945 | } |
fd88ce93 | 1946 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1947 | |
1948 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1949 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1950 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1951 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1952 | |
488f1d2d SJ |
1953 | cifs_fscache_get_client_cookie(tcp_ses); |
1954 | ||
c74093b6 JL |
1955 | /* queue echo request delayed work */ |
1956 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1957 | ||
63c038c2 JL |
1958 | return tcp_ses; |
1959 | ||
f7c5445a | 1960 | out_err_crypto_release: |
d2b91521 SP |
1961 | cifs_crypto_shash_release(tcp_ses); |
1962 | ||
f1d0c998 RL |
1963 | put_net(cifs_net_ns(tcp_ses)); |
1964 | ||
63c038c2 JL |
1965 | out_err: |
1966 | if (tcp_ses) { | |
8347a5cd SF |
1967 | if (!IS_ERR(tcp_ses->hostname)) |
1968 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1969 | if (tcp_ses->ssocket) |
1970 | sock_release(tcp_ses->ssocket); | |
1971 | kfree(tcp_ses); | |
1972 | } | |
1973 | return ERR_PTR(rc); | |
1974 | } | |
1975 | ||
96daf2b0 | 1976 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
1977 | { |
1978 | switch (ses->server->secType) { | |
1979 | case Kerberos: | |
1980 | if (vol->cred_uid != ses->cred_uid) | |
1981 | return 0; | |
1982 | break; | |
1983 | default: | |
1984 | /* anything else takes username/password */ | |
1985 | if (ses->user_name == NULL) | |
1986 | return 0; | |
1987 | if (strncmp(ses->user_name, vol->username, | |
1988 | MAX_USERNAME_SIZE)) | |
1989 | return 0; | |
1990 | if (strlen(vol->username) != 0 && | |
1991 | ses->password != NULL && | |
1992 | strncmp(ses->password, | |
1993 | vol->password ? vol->password : "", | |
1994 | MAX_PASSWORD_SIZE)) | |
1995 | return 0; | |
1996 | } | |
1997 | return 1; | |
1998 | } | |
1999 | ||
96daf2b0 | 2000 | static struct cifs_ses * |
4ff67b72 | 2001 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2002 | { |
96daf2b0 | 2003 | struct cifs_ses *ses; |
dea570e0 | 2004 | |
3f9bcca7 | 2005 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2006 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2007 | if (!match_session(ses, vol)) |
2008 | continue; | |
14fbf50d | 2009 | ++ses->ses_count; |
3f9bcca7 | 2010 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2011 | return ses; |
2012 | } | |
3f9bcca7 | 2013 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2014 | return NULL; |
2015 | } | |
dea570e0 | 2016 | |
14fbf50d | 2017 | static void |
96daf2b0 | 2018 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d JL |
2019 | { |
2020 | int xid; | |
2021 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 2022 | |
36988c76 | 2023 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 2024 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2025 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2026 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2027 | return; |
2028 | } | |
dea570e0 | 2029 | |
14fbf50d | 2030 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2031 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2032 | |
14fbf50d JL |
2033 | if (ses->status == CifsGood) { |
2034 | xid = GetXid(); | |
2035 | CIFSSMBLogoff(xid, ses); | |
2036 | _FreeXid(xid); | |
2037 | } | |
2038 | sesInfoFree(ses); | |
2039 | cifs_put_tcp_session(server); | |
2040 | } | |
dea570e0 | 2041 | |
d9b94201 SF |
2042 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2043 | ||
96daf2b0 | 2044 | static struct cifs_ses * |
36988c76 JL |
2045 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2046 | { | |
2047 | int rc = -ENOMEM, xid; | |
96daf2b0 | 2048 | struct cifs_ses *ses; |
a9f1b85e PS |
2049 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2050 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
2051 | |
2052 | xid = GetXid(); | |
2053 | ||
4ff67b72 | 2054 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2055 | if (ses) { |
2056 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2057 | ||
36988c76 | 2058 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2059 | rc = cifs_negotiate_protocol(xid, ses); |
2060 | if (rc) { | |
2061 | mutex_unlock(&ses->session_mutex); | |
2062 | /* problem -- put our ses reference */ | |
2063 | cifs_put_smb_ses(ses); | |
2064 | FreeXid(xid); | |
2065 | return ERR_PTR(rc); | |
2066 | } | |
36988c76 JL |
2067 | if (ses->need_reconnect) { |
2068 | cFYI(1, "Session needs reconnect"); | |
2069 | rc = cifs_setup_session(xid, ses, | |
2070 | volume_info->local_nls); | |
2071 | if (rc) { | |
2072 | mutex_unlock(&ses->session_mutex); | |
2073 | /* problem -- put our reference */ | |
2074 | cifs_put_smb_ses(ses); | |
2075 | FreeXid(xid); | |
2076 | return ERR_PTR(rc); | |
2077 | } | |
2078 | } | |
2079 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2080 | |
2081 | /* existing SMB ses has a server reference already */ | |
2082 | cifs_put_tcp_session(server); | |
36988c76 JL |
2083 | FreeXid(xid); |
2084 | return ses; | |
2085 | } | |
2086 | ||
2087 | cFYI(1, "Existing smb sess not found"); | |
2088 | ses = sesInfoAlloc(); | |
2089 | if (ses == NULL) | |
2090 | goto get_ses_fail; | |
2091 | ||
2092 | /* new SMB session uses our server ref */ | |
2093 | ses->server = server; | |
a9f1b85e PS |
2094 | if (server->dstaddr.ss_family == AF_INET6) |
2095 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2096 | else |
a9f1b85e | 2097 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2098 | |
8727c8a8 SF |
2099 | if (volume_info->username) { |
2100 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2101 | if (!ses->user_name) | |
2102 | goto get_ses_fail; | |
2103 | } | |
36988c76 JL |
2104 | |
2105 | /* volume_info->password freed at unmount */ | |
2106 | if (volume_info->password) { | |
2107 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2108 | if (!ses->password) | |
2109 | goto get_ses_fail; | |
2110 | } | |
2111 | if (volume_info->domainname) { | |
d3686d54 SP |
2112 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2113 | if (!ses->domainName) | |
2114 | goto get_ses_fail; | |
36988c76 | 2115 | } |
3e4b3e1f | 2116 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2117 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2118 | |
2119 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2120 | supported for many years, time to update default security mechanism */ | |
2121 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2122 | warned_on_ntlm = true; | |
2123 | cERROR(1, "default security mechanism requested. The default " | |
2124 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2125 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2126 | } |
36988c76 JL |
2127 | ses->overrideSecFlg = volume_info->secFlg; |
2128 | ||
2129 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2130 | rc = cifs_negotiate_protocol(xid, ses); |
2131 | if (!rc) | |
2132 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2133 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2134 | if (rc) |
36988c76 JL |
2135 | goto get_ses_fail; |
2136 | ||
2137 | /* success, put it on the list */ | |
3f9bcca7 | 2138 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2139 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2140 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2141 | |
2142 | FreeXid(xid); | |
2143 | return ses; | |
2144 | ||
2145 | get_ses_fail: | |
2146 | sesInfoFree(ses); | |
2147 | FreeXid(xid); | |
2148 | return ERR_PTR(rc); | |
2149 | } | |
2150 | ||
96daf2b0 | 2151 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2152 | { |
2153 | if (tcon->tidStatus == CifsExiting) | |
2154 | return 0; | |
2155 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2156 | return 0; | |
2157 | return 1; | |
2158 | } | |
2159 | ||
96daf2b0 SF |
2160 | static struct cifs_tcon * |
2161 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2162 | { |
2163 | struct list_head *tmp; | |
96daf2b0 | 2164 | struct cifs_tcon *tcon; |
f1987b44 | 2165 | |
3f9bcca7 | 2166 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2167 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2168 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2169 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2170 | continue; |
f1987b44 | 2171 | ++tcon->tc_count; |
3f9bcca7 | 2172 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2173 | return tcon; |
1da177e4 | 2174 | } |
3f9bcca7 | 2175 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2176 | return NULL; |
2177 | } | |
2178 | ||
f1987b44 | 2179 | static void |
96daf2b0 | 2180 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 JL |
2181 | { |
2182 | int xid; | |
96daf2b0 | 2183 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2184 | |
d00c28de | 2185 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2186 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2187 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2188 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2189 | return; |
2190 | } | |
2191 | ||
2192 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2193 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2194 | |
2195 | xid = GetXid(); | |
2196 | CIFSSMBTDis(xid, tcon); | |
2197 | _FreeXid(xid); | |
2198 | ||
d03382ce | 2199 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2200 | tconInfoFree(tcon); |
f1987b44 JL |
2201 | cifs_put_smb_ses(ses); |
2202 | } | |
2203 | ||
96daf2b0 SF |
2204 | static struct cifs_tcon * |
2205 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2206 | { |
2207 | int rc, xid; | |
96daf2b0 | 2208 | struct cifs_tcon *tcon; |
d00c28de JL |
2209 | |
2210 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2211 | if (tcon) { | |
2212 | cFYI(1, "Found match on UNC path"); | |
2213 | /* existing tcon already has a reference */ | |
2214 | cifs_put_smb_ses(ses); | |
2215 | if (tcon->seal != volume_info->seal) | |
2216 | cERROR(1, "transport encryption setting " | |
2217 | "conflicts with existing tid"); | |
2218 | return tcon; | |
2219 | } | |
2220 | ||
2221 | tcon = tconInfoAlloc(); | |
2222 | if (tcon == NULL) { | |
2223 | rc = -ENOMEM; | |
2224 | goto out_fail; | |
2225 | } | |
2226 | ||
2227 | tcon->ses = ses; | |
2228 | if (volume_info->password) { | |
2229 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2230 | if (!tcon->password) { | |
2231 | rc = -ENOMEM; | |
2232 | goto out_fail; | |
2233 | } | |
2234 | } | |
2235 | ||
2236 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2237 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2238 | cERROR(1, "Missing share name"); | |
2239 | rc = -ENODEV; | |
2240 | goto out_fail; | |
2241 | } | |
2242 | ||
2243 | /* BB Do we need to wrap session_mutex around | |
2244 | * this TCon call and Unix SetFS as | |
2245 | * we do on SessSetup and reconnect? */ | |
2246 | xid = GetXid(); | |
2247 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2248 | FreeXid(xid); | |
2249 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2250 | if (rc) | |
2251 | goto out_fail; | |
2252 | ||
2253 | if (volume_info->nodfs) { | |
2254 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2255 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2256 | } | |
2257 | tcon->seal = volume_info->seal; | |
2258 | /* we can have only one retry value for a connection | |
2259 | to a share so for resources mounted more than once | |
2260 | to the same server share the last value passed in | |
2261 | for the retry flag is used */ | |
2262 | tcon->retry = volume_info->retry; | |
2263 | tcon->nocase = volume_info->nocase; | |
2264 | tcon->local_lease = volume_info->local_lease; | |
2265 | ||
3f9bcca7 | 2266 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2267 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2268 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2269 | |
d03382ce SJ |
2270 | cifs_fscache_get_super_cookie(tcon); |
2271 | ||
d00c28de JL |
2272 | return tcon; |
2273 | ||
2274 | out_fail: | |
2275 | tconInfoFree(tcon); | |
2276 | return ERR_PTR(rc); | |
2277 | } | |
2278 | ||
9d002df4 JL |
2279 | void |
2280 | cifs_put_tlink(struct tcon_link *tlink) | |
2281 | { | |
2282 | if (!tlink || IS_ERR(tlink)) | |
2283 | return; | |
2284 | ||
2285 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2286 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2287 | tlink->tl_time = jiffies; | |
2288 | return; | |
2289 | } | |
2290 | ||
2291 | if (!IS_ERR(tlink_tcon(tlink))) | |
2292 | cifs_put_tcon(tlink_tcon(tlink)); | |
2293 | kfree(tlink); | |
2294 | return; | |
2295 | } | |
d00c28de | 2296 | |
25c7f41e | 2297 | static inline struct tcon_link * |
cd51875d PS |
2298 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2299 | { | |
2300 | return cifs_sb->master_tlink; | |
2301 | } | |
25c7f41e PS |
2302 | |
2303 | static int | |
2304 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2305 | { | |
2306 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2307 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2308 | ||
2309 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2310 | return 0; | |
2311 | ||
2312 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2313 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2314 | return 0; | |
2315 | ||
25c7f41e | 2316 | /* |
5eba8ab3 JL |
2317 | * We want to share sb only if we don't specify an r/wsize or |
2318 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2319 | */ |
2320 | if (new->wsize && new->wsize < old->wsize) | |
2321 | return 0; | |
2322 | ||
5eba8ab3 JL |
2323 | if (new->rsize && new->rsize < old->rsize) |
2324 | return 0; | |
2325 | ||
25c7f41e PS |
2326 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2327 | return 0; | |
2328 | ||
2329 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2330 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2331 | return 0; | |
2332 | ||
2333 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2334 | return 0; | |
2335 | ||
2336 | if (old->actimeo != new->actimeo) | |
2337 | return 0; | |
2338 | ||
2339 | return 1; | |
2340 | } | |
2341 | ||
2342 | int | |
2343 | cifs_match_super(struct super_block *sb, void *data) | |
2344 | { | |
2345 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2346 | struct smb_vol *volume_info; | |
2347 | struct cifs_sb_info *cifs_sb; | |
2348 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2349 | struct cifs_ses *ses; |
2350 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2351 | struct tcon_link *tlink; |
2352 | struct sockaddr_storage addr; | |
2353 | int rc = 0; | |
2354 | ||
2355 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2356 | ||
2357 | spin_lock(&cifs_tcp_ses_lock); | |
2358 | cifs_sb = CIFS_SB(sb); | |
2359 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2360 | if (IS_ERR(tlink)) { | |
2361 | spin_unlock(&cifs_tcp_ses_lock); | |
2362 | return rc; | |
2363 | } | |
2364 | tcon = tlink_tcon(tlink); | |
2365 | ses = tcon->ses; | |
2366 | tcp_srv = ses->server; | |
2367 | ||
2368 | volume_info = mnt_data->vol; | |
2369 | ||
2370 | if (!volume_info->UNCip || !volume_info->UNC) | |
2371 | goto out; | |
2372 | ||
2373 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2374 | volume_info->UNCip, | |
2375 | strlen(volume_info->UNCip), | |
2376 | volume_info->port); | |
2377 | if (!rc) | |
2378 | goto out; | |
2379 | ||
2380 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2381 | !match_session(ses, volume_info) || | |
2382 | !match_tcon(tcon, volume_info->UNC)) { | |
2383 | rc = 0; | |
2384 | goto out; | |
2385 | } | |
2386 | ||
2387 | rc = compare_mount_options(sb, mnt_data); | |
2388 | out: | |
25c7f41e | 2389 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2390 | cifs_put_tlink(tlink); |
25c7f41e PS |
2391 | return rc; |
2392 | } | |
2393 | ||
1da177e4 | 2394 | int |
96daf2b0 | 2395 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
50c2f753 | 2396 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
366781c1 | 2397 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2398 | { |
2399 | char *temp_unc; | |
2400 | int rc = 0; | |
2401 | ||
2402 | *pnum_referrals = 0; | |
366781c1 | 2403 | *preferrals = NULL; |
1da177e4 LT |
2404 | |
2405 | if (pSesInfo->ipc_tid == 0) { | |
2406 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2407 | strnlen(pSesInfo->serverName, |
2408 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2409 | + 1 + 4 /* slash IPC$ */ + 2, |
2410 | GFP_KERNEL); | |
2411 | if (temp_unc == NULL) | |
2412 | return -ENOMEM; | |
2413 | temp_unc[0] = '\\'; | |
2414 | temp_unc[1] = '\\'; | |
2415 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2416 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2417 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2418 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2419 | kfree(temp_unc); |
2420 | } | |
2421 | if (rc == 0) | |
c2cf07d5 | 2422 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2423 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2424 | /* BB map targetUNCs to dfs_info3 structures, here or |
2425 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2426 | |
2427 | return rc; | |
2428 | } | |
2429 | ||
09e50d55 JL |
2430 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2431 | static struct lock_class_key cifs_key[2]; | |
2432 | static struct lock_class_key cifs_slock_key[2]; | |
2433 | ||
2434 | static inline void | |
2435 | cifs_reclassify_socket4(struct socket *sock) | |
2436 | { | |
2437 | struct sock *sk = sock->sk; | |
2438 | BUG_ON(sock_owned_by_user(sk)); | |
2439 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2440 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2441 | } | |
2442 | ||
2443 | static inline void | |
2444 | cifs_reclassify_socket6(struct socket *sock) | |
2445 | { | |
2446 | struct sock *sk = sock->sk; | |
2447 | BUG_ON(sock_owned_by_user(sk)); | |
2448 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2449 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2450 | } | |
2451 | #else | |
2452 | static inline void | |
2453 | cifs_reclassify_socket4(struct socket *sock) | |
2454 | { | |
2455 | } | |
2456 | ||
2457 | static inline void | |
2458 | cifs_reclassify_socket6(struct socket *sock) | |
2459 | { | |
2460 | } | |
2461 | #endif | |
2462 | ||
1da177e4 | 2463 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2464 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2465 | { |
50c2f753 | 2466 | unsigned int i, j; |
1da177e4 | 2467 | |
50c2f753 | 2468 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2469 | /* mask a nibble at a time and encode */ |
2470 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2471 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2472 | j += 2; |
1da177e4 LT |
2473 | } |
2474 | ||
2475 | } | |
2476 | ||
3eb9a889 BG |
2477 | static int |
2478 | bind_socket(struct TCP_Server_Info *server) | |
2479 | { | |
2480 | int rc = 0; | |
2481 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2482 | /* Bind to the specified local IP address */ | |
2483 | struct socket *socket = server->ssocket; | |
2484 | rc = socket->ops->bind(socket, | |
2485 | (struct sockaddr *) &server->srcaddr, | |
2486 | sizeof(server->srcaddr)); | |
2487 | if (rc < 0) { | |
2488 | struct sockaddr_in *saddr4; | |
2489 | struct sockaddr_in6 *saddr6; | |
2490 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2491 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2492 | if (saddr6->sin6_family == AF_INET6) | |
2493 | cERROR(1, "cifs: " | |
2494 | "Failed to bind to: %pI6c, error: %d\n", | |
2495 | &saddr6->sin6_addr, rc); | |
2496 | else | |
2497 | cERROR(1, "cifs: " | |
2498 | "Failed to bind to: %pI4, error: %d\n", | |
2499 | &saddr4->sin_addr.s_addr, rc); | |
2500 | } | |
2501 | } | |
2502 | return rc; | |
2503 | } | |
1da177e4 LT |
2504 | |
2505 | static int | |
a9f1b85e | 2506 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2507 | { |
2508 | int rc = 0; | |
a9f1b85e PS |
2509 | /* |
2510 | * some servers require RFC1001 sessinit before sending | |
2511 | * negprot - BB check reconnection in case where second | |
2512 | * sessinit is sent but no second negprot | |
2513 | */ | |
2514 | struct rfc1002_session_packet *ses_init_buf; | |
2515 | struct smb_hdr *smb_buf; | |
2516 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2517 | GFP_KERNEL); | |
2518 | if (ses_init_buf) { | |
2519 | ses_init_buf->trailer.session_req.called_len = 32; | |
2520 | ||
2521 | if (server->server_RFC1001_name && | |
2522 | server->server_RFC1001_name[0] != 0) | |
2523 | rfc1002mangle(ses_init_buf->trailer. | |
2524 | session_req.called_name, | |
2525 | server->server_RFC1001_name, | |
2526 | RFC1001_NAME_LEN_WITH_NULL); | |
2527 | else | |
2528 | rfc1002mangle(ses_init_buf->trailer. | |
2529 | session_req.called_name, | |
2530 | DEFAULT_CIFS_CALLED_NAME, | |
2531 | RFC1001_NAME_LEN_WITH_NULL); | |
2532 | ||
2533 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2534 | ||
2535 | /* | |
2536 | * calling name ends in null (byte 16) from old smb | |
2537 | * convention. | |
2538 | */ | |
2539 | if (server->workstation_RFC1001_name && | |
2540 | server->workstation_RFC1001_name[0] != 0) | |
2541 | rfc1002mangle(ses_init_buf->trailer. | |
2542 | session_req.calling_name, | |
2543 | server->workstation_RFC1001_name, | |
2544 | RFC1001_NAME_LEN_WITH_NULL); | |
2545 | else | |
2546 | rfc1002mangle(ses_init_buf->trailer. | |
2547 | session_req.calling_name, | |
2548 | "LINUX_CIFS_CLNT", | |
2549 | RFC1001_NAME_LEN_WITH_NULL); | |
2550 | ||
2551 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2552 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2553 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2554 | ||
2555 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2556 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2557 | rc = smb_send(server, smb_buf, 0x44); |
2558 | kfree(ses_init_buf); | |
2559 | /* | |
2560 | * RFC1001 layer in at least one server | |
2561 | * requires very short break before negprot | |
2562 | * presumably because not expecting negprot | |
2563 | * to follow so fast. This is a simple | |
2564 | * solution that works without | |
2565 | * complicating the code and causes no | |
2566 | * significant slowing down on mount | |
2567 | * for everyone else | |
2568 | */ | |
2569 | usleep_range(1000, 2000); | |
2570 | } | |
2571 | /* | |
2572 | * else the negprot may still work without this | |
2573 | * even though malloc failed | |
2574 | */ | |
2575 | ||
2576 | return rc; | |
2577 | } | |
2578 | ||
2579 | static int | |
2580 | generic_ip_connect(struct TCP_Server_Info *server) | |
2581 | { | |
2582 | int rc = 0; | |
6da97910 | 2583 | __be16 sport; |
a9f1b85e | 2584 | int slen, sfamily; |
bcf4b106 | 2585 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2586 | struct sockaddr *saddr; |
2587 | ||
2588 | saddr = (struct sockaddr *) &server->dstaddr; | |
2589 | ||
2590 | if (server->dstaddr.ss_family == AF_INET6) { | |
2591 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2592 | slen = sizeof(struct sockaddr_in6); | |
2593 | sfamily = AF_INET6; | |
2594 | } else { | |
2595 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2596 | slen = sizeof(struct sockaddr_in); | |
2597 | sfamily = AF_INET; | |
2598 | } | |
1da177e4 | 2599 | |
bcf4b106 | 2600 | if (socket == NULL) { |
f1d0c998 RL |
2601 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2602 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2603 | if (rc < 0) { |
b6b38f70 | 2604 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2605 | server->ssocket = NULL; |
1da177e4 | 2606 | return rc; |
1da177e4 | 2607 | } |
bcf4b106 JL |
2608 | |
2609 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2610 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2611 | server->ssocket = socket; |
2612 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2613 | if (sfamily == AF_INET6) |
2614 | cifs_reclassify_socket6(socket); | |
2615 | else | |
2616 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2617 | } |
2618 | ||
3eb9a889 BG |
2619 | rc = bind_socket(server); |
2620 | if (rc < 0) | |
2621 | return rc; | |
2622 | ||
bcf4b106 JL |
2623 | /* |
2624 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2625 | * the default. sock_setsockopt not used because it expects |
2626 | * user space buffer | |
bcf4b106 JL |
2627 | */ |
2628 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2629 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2630 | |
b387eaeb | 2631 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2632 | if (server->noautotune) { |
2633 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2634 | socket->sk->sk_sndbuf = 200 * 1024; | |
2635 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2636 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2637 | } |
1da177e4 | 2638 | |
6a5fa236 | 2639 | if (server->tcp_nodelay) { |
a9f1b85e | 2640 | int val = 1; |
6a5fa236 SF |
2641 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2642 | (char *)&val, sizeof(val)); | |
2643 | if (rc) | |
b6b38f70 | 2644 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2645 | } |
2646 | ||
b6b38f70 | 2647 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2648 | socket->sk->sk_sndbuf, |
b6b38f70 | 2649 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2650 | |
ee1b3ea9 JL |
2651 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2652 | if (rc < 0) { | |
2653 | cFYI(1, "Error %d connecting to server", rc); | |
2654 | sock_release(socket); | |
2655 | server->ssocket = NULL; | |
2656 | return rc; | |
2657 | } | |
2658 | ||
a9f1b85e PS |
2659 | if (sport == htons(RFC1001_PORT)) |
2660 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2661 | |
1da177e4 LT |
2662 | return rc; |
2663 | } | |
2664 | ||
2665 | static int | |
a9f1b85e | 2666 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2667 | { |
6da97910 | 2668 | __be16 *sport; |
a9f1b85e PS |
2669 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2670 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2671 | |
a9f1b85e PS |
2672 | if (server->dstaddr.ss_family == AF_INET6) |
2673 | sport = &addr6->sin6_port; | |
2674 | else | |
2675 | sport = &addr->sin_port; | |
1da177e4 | 2676 | |
a9f1b85e PS |
2677 | if (*sport == 0) { |
2678 | int rc; | |
1da177e4 | 2679 | |
a9f1b85e PS |
2680 | /* try with 445 port at first */ |
2681 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2682 | |
a9f1b85e | 2683 | rc = generic_ip_connect(server); |
1da177e4 | 2684 | if (rc >= 0) |
a9f1b85e | 2685 | return rc; |
6a5fa236 | 2686 | |
a9f1b85e PS |
2687 | /* if it failed, try with 139 port */ |
2688 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2689 | } |
2690 | ||
a9f1b85e | 2691 | return generic_ip_connect(server); |
1da177e4 LT |
2692 | } |
2693 | ||
96daf2b0 | 2694 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
2c6292ae | 2695 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
2696 | { |
2697 | /* if we are reconnecting then should we check to see if | |
2698 | * any requested capabilities changed locally e.g. via | |
2699 | * remount but we can not do much about it here | |
2700 | * if they have (even if we could detect it by the following) | |
2701 | * Perhaps we could add a backpointer to array of sb from tcon | |
2702 | * or if we change to make all sb to same share the same | |
2703 | * sb as NFS - then we only have one backpointer to sb. | |
2704 | * What if we wanted to mount the server share twice once with | |
2705 | * and once without posixacls or posix paths? */ | |
2706 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2707 | |
c18c842b SF |
2708 | if (vol_info && vol_info->no_linux_ext) { |
2709 | tcon->fsUnixInfo.Capability = 0; | |
2710 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2711 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2712 | return; |
2713 | } else if (vol_info) | |
2714 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2715 | ||
2716 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2717 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2718 | return; |
2719 | } | |
50c2f753 | 2720 | |
fb8c4b14 | 2721 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2722 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 2723 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
2724 | /* check for reconnect case in which we do not |
2725 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2726 | if (vol_info == NULL) { |
50c2f753 | 2727 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2728 | originally at mount time */ |
2729 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2730 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2731 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2732 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2733 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2734 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2735 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2736 | cERROR(1, "possible reconnect error"); |
2737 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2738 | } |
8af18971 | 2739 | } |
50c2f753 | 2740 | |
6848b733 SF |
2741 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
2742 | cERROR(1, "per-share encryption not supported yet"); | |
2743 | ||
8af18971 | 2744 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2745 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2746 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2747 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2748 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
2749 | if (cifs_sb) |
2750 | cifs_sb->mnt_cifs_flags |= | |
2751 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
2752 | } |
2753 | ||
75865f8c | 2754 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2755 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2756 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2757 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
2758 | if (cifs_sb) |
2759 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
2760 | CIFS_MOUNT_POSIX_PATHS; |
2761 | } | |
50c2f753 | 2762 | |
b6b38f70 | 2763 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2764 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2765 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2766 | cFYI(1, "FCNTL cap"); |
75865f8c | 2767 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2768 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2769 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2770 | cFYI(1, "POSIX path cap"); |
75865f8c | 2771 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2772 | cFYI(1, "XATTR cap"); |
75865f8c | 2773 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2774 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2775 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2776 | cFYI(1, "very large read cap"); |
75865f8c | 2777 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2778 | cFYI(1, "very large write cap"); |
6848b733 SF |
2779 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
2780 | cFYI(1, "transport encryption cap"); | |
2781 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
2782 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
2783 | #endif /* CIFS_DEBUG2 */ |
2784 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2785 | if (vol_info == NULL) { |
b6b38f70 | 2786 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2787 | } else |
b6b38f70 | 2788 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2789 | "with the server failed. Consider " |
2790 | "mounting with the Unix Extensions\n" | |
2791 | "disabled, if problems are found, " | |
2792 | "by specifying the nounix mount " | |
b6b38f70 | 2793 | "option."); |
5a44b319 | 2794 | |
8af18971 SF |
2795 | } |
2796 | } | |
2797 | } | |
2798 | ||
724d9f1c PS |
2799 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
2800 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2801 | { |
2de970ff JL |
2802 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2803 | ||
2ced6f69 AV |
2804 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
2805 | cifs_sb->tlink_tree = RB_ROOT; | |
2806 | ||
25c7f41e | 2807 | /* |
5eba8ab3 JL |
2808 | * Temporarily set r/wsize for matching superblock. If we end up using |
2809 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 2810 | */ |
5eba8ab3 | 2811 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
2812 | cifs_sb->wsize = pvolume_info->wsize; |
2813 | ||
3b795210 SF |
2814 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
2815 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3d3ea8e6 SP |
2816 | if (pvolume_info->backupuid_specified) |
2817 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; | |
2818 | if (pvolume_info->backupgid_specified) | |
2819 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; | |
3b795210 SF |
2820 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; |
2821 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 2822 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 2823 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 2824 | |
6d20e840 | 2825 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 2826 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 2827 | |
3b795210 SF |
2828 | if (pvolume_info->noperm) |
2829 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2830 | if (pvolume_info->setuids) | |
2831 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2832 | if (pvolume_info->server_ino) | |
2833 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2834 | if (pvolume_info->remap) | |
2835 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2836 | if (pvolume_info->no_xattr) | |
2837 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2838 | if (pvolume_info->sfu_emul) | |
2839 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2840 | if (pvolume_info->nobrl) | |
2841 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2842 | if (pvolume_info->nostrictsync) |
4717bed6 | 2843 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2844 | if (pvolume_info->mand_lock) |
2845 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
2846 | if (pvolume_info->rwpidforward) |
2847 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
2848 | if (pvolume_info->cifs_acl) |
2849 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3d3ea8e6 SP |
2850 | if (pvolume_info->backupuid_specified) |
2851 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; | |
2852 | if (pvolume_info->backupgid_specified) | |
2853 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; | |
3b795210 SF |
2854 | if (pvolume_info->override_uid) |
2855 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2856 | if (pvolume_info->override_gid) | |
2857 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2858 | if (pvolume_info->dynperm) | |
2859 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2860 | if (pvolume_info->fsc) |
2861 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2862 | if (pvolume_info->multiuser) |
2863 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2864 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
2865 | if (pvolume_info->strict_io) |
2866 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 2867 | if (pvolume_info->direct_io) { |
b6b38f70 | 2868 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2869 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2870 | } | |
736a3320 SM |
2871 | if (pvolume_info->mfsymlinks) { |
2872 | if (pvolume_info->sfu_emul) { | |
2873 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2874 | "mount option is used"); | |
2875 | } else { | |
2876 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2877 | } | |
2878 | } | |
3b795210 SF |
2879 | |
2880 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2881 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2882 | "mount option supported"); | |
b1c8d2b4 JL |
2883 | } |
2884 | ||
f7910cbd | 2885 | /* |
5eba8ab3 JL |
2886 | * When the server supports very large reads and writes via POSIX extensions, |
2887 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not | |
2888 | * including the RFC1001 length. | |
f7910cbd JL |
2889 | * |
2890 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
2891 | * writeback however as we have to allocate an array of pointers for the |
2892 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
5eba8ab3 JL |
2893 | * |
2894 | * For reads, there is a similar problem as we need to allocate an array | |
2895 | * of kvecs to handle the receive, though that should only need to be done | |
2896 | * once. | |
f7910cbd | 2897 | */ |
1190f6a0 | 2898 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 2899 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
f7910cbd JL |
2900 | |
2901 | /* | |
5eba8ab3 JL |
2902 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
2903 | * of 2^17-1 minus the size of the call header. That allows for a read or | |
2904 | * write up to the maximum size described by RFC1002. | |
f7910cbd | 2905 | */ |
94443f43 | 2906 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 2907 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
f7910cbd JL |
2908 | |
2909 | /* | |
2910 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
2911 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
2912 | * a single wsize request with a single call. | |
2913 | */ | |
5eba8ab3 JL |
2914 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
2915 | ||
2916 | /* | |
2917 | * Windows only supports a max of 60k reads. Default to that when posix | |
2918 | * extensions aren't in force. | |
2919 | */ | |
2920 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) | |
f7910cbd JL |
2921 | |
2922 | static unsigned int | |
96daf2b0 | 2923 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
2924 | { |
2925 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
2926 | struct TCP_Server_Info *server = tcon->ses->server; | |
2927 | unsigned int wsize = pvolume_info->wsize ? pvolume_info->wsize : | |
5eba8ab3 | 2928 | CIFS_DEFAULT_IOSIZE; |
f7910cbd JL |
2929 | |
2930 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
2931 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 2932 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 2933 | |
1190f6a0 JL |
2934 | /* |
2935 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
2936 | * Limit it to max buffer offered by the server, minus the size of the | |
2937 | * WRITEX header, not including the 4 byte RFC1001 length. | |
2938 | */ | |
2939 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
2940 | (!(server->capabilities & CAP_UNIX) && | |
2941 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
2942 | wsize = min_t(unsigned int, wsize, | |
2943 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd JL |
2944 | |
2945 | /* hard limit of CIFS_MAX_WSIZE */ | |
2946 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
2947 | ||
2948 | return wsize; | |
2949 | } | |
2950 | ||
5eba8ab3 JL |
2951 | static unsigned int |
2952 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) | |
2953 | { | |
2954 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
2955 | struct TCP_Server_Info *server = tcon->ses->server; | |
2956 | unsigned int rsize, defsize; | |
2957 | ||
2958 | /* | |
2959 | * Set default value... | |
2960 | * | |
2961 | * HACK alert! Ancient servers have very small buffers. Even though | |
2962 | * MS-CIFS indicates that servers are only limited by the client's | |
2963 | * bufsize for reads, testing against win98se shows that it throws | |
2964 | * INVALID_PARAMETER errors if you try to request too large a read. | |
2965 | * | |
2966 | * If the server advertises a MaxBufferSize of less than one page, | |
2967 | * assume that it also can't satisfy reads larger than that either. | |
2968 | * | |
2969 | * FIXME: Is there a better heuristic for this? | |
2970 | */ | |
2971 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
2972 | defsize = CIFS_DEFAULT_IOSIZE; | |
2973 | else if (server->capabilities & CAP_LARGE_READ_X) | |
2974 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
2975 | else if (server->maxBuf >= PAGE_CACHE_SIZE) | |
2976 | defsize = CIFSMaxBufSize; | |
2977 | else | |
2978 | defsize = server->maxBuf - sizeof(READ_RSP); | |
2979 | ||
2980 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; | |
2981 | ||
2982 | /* | |
2983 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
2984 | * the client's MaxBufferSize. | |
2985 | */ | |
2986 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
2987 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
2988 | ||
2989 | /* hard limit of CIFS_MAX_RSIZE */ | |
2990 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
2991 | ||
2992 | return rsize; | |
2993 | } | |
2994 | ||
e4cce94c | 2995 | static int |
96daf2b0 | 2996 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
2997 | struct cifs_sb_info *cifs_sb, const char *full_path) |
2998 | { | |
2999 | int rc; | |
e4cce94c IM |
3000 | FILE_ALL_INFO *pfile_info; |
3001 | ||
e4cce94c IM |
3002 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
3003 | if (pfile_info == NULL) | |
3004 | return -ENOMEM; | |
3005 | ||
3006 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
3007 | 0 /* not legacy */, cifs_sb->local_nls, | |
3008 | cifs_sb->mnt_cifs_flags & | |
3009 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
3010 | |
3011 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
3012 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
3013 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
3014 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
3015 | kfree(pfile_info); |
3016 | return rc; | |
3017 | } | |
3018 | ||
b9bce2e9 JL |
3019 | static void |
3020 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3021 | { |
b946845a | 3022 | kfree(volume_info->username); |
1bfe73c2 | 3023 | kzfree(volume_info->password); |
13589c43 SF |
3024 | if (volume_info->UNCip != volume_info->UNC + 2) |
3025 | kfree(volume_info->UNCip); | |
95c75454 | 3026 | kfree(volume_info->UNC); |
b946845a SF |
3027 | kfree(volume_info->domainname); |
3028 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3029 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3030 | } |
3031 | ||
3032 | void | |
3033 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3034 | { | |
3035 | if (!volume_info) | |
3036 | return; | |
3037 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3038 | kfree(volume_info); |
1bfe73c2 IM |
3039 | } |
3040 | ||
b9bce2e9 | 3041 | |
2d6d589d | 3042 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3043 | /* build_path_to_root returns full path to root when |
3044 | * we do not have an exiting connection (tcon) */ | |
3045 | static char * | |
b2a0fa15 | 3046 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3047 | const struct cifs_sb_info *cifs_sb) |
3048 | { | |
b2a0fa15 JL |
3049 | char *full_path, *pos; |
3050 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3051 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3052 | |
b2a0fa15 | 3053 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3054 | if (full_path == NULL) |
3055 | return ERR_PTR(-ENOMEM); | |
3056 | ||
b2a0fa15 JL |
3057 | strncpy(full_path, vol->UNC, unc_len); |
3058 | pos = full_path + unc_len; | |
3059 | ||
3060 | if (pplen) { | |
3061 | strncpy(pos, vol->prepath, pplen); | |
3062 | pos += pplen; | |
3063 | } | |
3064 | ||
3065 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3066 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3067 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3068 | return full_path; |
3069 | } | |
dd613945 SF |
3070 | |
3071 | /* | |
3072 | * Perform a dfs referral query for a share and (optionally) prefix | |
3073 | * | |
046462ab SF |
3074 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3075 | * to a string containing updated options for the submount. Otherwise it | |
3076 | * will be left untouched. | |
dd613945 SF |
3077 | * |
3078 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3079 | * determine whether there were referrals. | |
3080 | */ | |
3081 | static int | |
96daf2b0 | 3082 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
dd613945 | 3083 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3084 | int check_prefix) |
dd613945 SF |
3085 | { |
3086 | int rc; | |
3087 | unsigned int num_referrals = 0; | |
3088 | struct dfs_info3_param *referrals = NULL; | |
3089 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3090 | ||
3091 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3092 | if (IS_ERR(full_path)) | |
3093 | return PTR_ERR(full_path); | |
3094 | ||
3095 | /* For DFS paths, skip the first '\' of the UNC */ | |
3096 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3097 | ||
3098 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
3099 | &num_referrals, &referrals, | |
3100 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3101 | ||
3102 | if (!rc && num_referrals > 0) { | |
3103 | char *fake_devname = NULL; | |
3104 | ||
3105 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3106 | full_path + 1, referrals, | |
3107 | &fake_devname); | |
3108 | ||
3109 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3110 | |
dd613945 SF |
3111 | if (IS_ERR(mdata)) { |
3112 | rc = PTR_ERR(mdata); | |
3113 | mdata = NULL; | |
b9bce2e9 JL |
3114 | } else { |
3115 | cleanup_volume_info_contents(volume_info); | |
3116 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3117 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3118 | fake_devname); | |
dd613945 | 3119 | } |
b9bce2e9 JL |
3120 | kfree(fake_devname); |
3121 | kfree(cifs_sb->mountdata); | |
046462ab | 3122 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3123 | } |
3124 | kfree(full_path); | |
3125 | return rc; | |
3126 | } | |
2d6d589d | 3127 | #endif |
1bfe73c2 | 3128 | |
04db79b0 JL |
3129 | static int |
3130 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3131 | const char *devname) | |
1da177e4 | 3132 | { |
724d9f1c | 3133 | int rc = 0; |
1da177e4 | 3134 | |
04db79b0 JL |
3135 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3136 | return -EINVAL; | |
1da177e4 | 3137 | |
7586b765 | 3138 | if (volume_info->nullauth) { |
b6b38f70 | 3139 | cFYI(1, "null user"); |
446b23a7 | 3140 | volume_info->username = kzalloc(1, GFP_KERNEL); |
04db79b0 JL |
3141 | if (volume_info->username == NULL) |
3142 | return -ENOMEM; | |
7586b765 | 3143 | } else if (volume_info->username) { |
1da177e4 | 3144 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3145 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3146 | } else { |
bf820679 | 3147 | cifserror("No username specified"); |
50c2f753 SF |
3148 | /* In userspace mount helper we can get user name from alternate |
3149 | locations such as env variables and files on disk */ | |
04db79b0 | 3150 | return -EINVAL; |
1da177e4 LT |
3151 | } |
3152 | ||
1da177e4 | 3153 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3154 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3155 | /* load_nls_default cannot return null */ |
3156 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3157 | } else { |
a5fc4ce0 JL |
3158 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3159 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3160 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3161 | volume_info->iocharset); | |
04db79b0 | 3162 | return -ELIBACC; |
1da177e4 LT |
3163 | } |
3164 | } | |
724d9f1c | 3165 | |
724d9f1c PS |
3166 | return rc; |
3167 | } | |
3168 | ||
04db79b0 JL |
3169 | struct smb_vol * |
3170 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3171 | { | |
3172 | int rc; | |
3173 | struct smb_vol *volume_info; | |
3174 | ||
3175 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3176 | if (!volume_info) | |
3177 | return ERR_PTR(-ENOMEM); | |
3178 | ||
3179 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3180 | if (rc) { | |
3181 | cifs_cleanup_volume_info(volume_info); | |
3182 | volume_info = ERR_PTR(rc); | |
3183 | } | |
3184 | ||
3185 | return volume_info; | |
3186 | } | |
3187 | ||
66bfaadc JL |
3188 | /* make sure ra_pages is a multiple of rsize */ |
3189 | static inline unsigned int | |
3190 | cifs_ra_pages(struct cifs_sb_info *cifs_sb) | |
3191 | { | |
3192 | unsigned int reads; | |
3193 | unsigned int rsize_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; | |
3194 | ||
3195 | if (rsize_pages >= default_backing_dev_info.ra_pages) | |
3196 | return default_backing_dev_info.ra_pages; | |
3197 | else if (rsize_pages == 0) | |
3198 | return rsize_pages; | |
3199 | ||
3200 | reads = default_backing_dev_info.ra_pages / rsize_pages; | |
3201 | return reads * rsize_pages; | |
3202 | } | |
3203 | ||
724d9f1c | 3204 | int |
2c6292ae | 3205 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c PS |
3206 | { |
3207 | int rc = 0; | |
3208 | int xid; | |
96daf2b0 SF |
3209 | struct cifs_ses *pSesInfo; |
3210 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3211 | struct TCP_Server_Info *srvTcp; |
3212 | char *full_path; | |
3213 | struct tcon_link *tlink; | |
3214 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3215 | int referral_walks_count = 0; | |
20547490 | 3216 | #endif |
dd854466 AV |
3217 | |
3218 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3219 | if (rc) | |
3220 | return rc; | |
3221 | ||
20547490 | 3222 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3223 | try_mount_again: |
3224 | /* cleanup activities if we're chasing a referral */ | |
3225 | if (referral_walks_count) { | |
3226 | if (tcon) | |
3227 | cifs_put_tcon(tcon); | |
3228 | else if (pSesInfo) | |
3229 | cifs_put_smb_ses(pSesInfo); | |
3230 | ||
724d9f1c PS |
3231 | FreeXid(xid); |
3232 | } | |
3233 | #endif | |
3234 | tcon = NULL; | |
3235 | pSesInfo = NULL; | |
3236 | srvTcp = NULL; | |
3237 | full_path = NULL; | |
3238 | tlink = NULL; | |
3239 | ||
3240 | xid = GetXid(); | |
1da177e4 | 3241 | |
63c038c2 | 3242 | /* get a reference to a tcp session */ |
7586b765 | 3243 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3244 | if (IS_ERR(srvTcp)) { |
3245 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3246 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3247 | goto out; |
1da177e4 LT |
3248 | } |
3249 | ||
36988c76 JL |
3250 | /* get a reference to a SMB session */ |
3251 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3252 | if (IS_ERR(pSesInfo)) { | |
3253 | rc = PTR_ERR(pSesInfo); | |
3254 | pSesInfo = NULL; | |
3255 | goto mount_fail_check; | |
1da177e4 | 3256 | } |
50c2f753 | 3257 | |
d00c28de JL |
3258 | /* search for existing tcon to this server share */ |
3259 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3260 | if (IS_ERR(tcon)) { | |
3261 | rc = PTR_ERR(tcon); | |
3262 | tcon = NULL; | |
1bfe73c2 | 3263 | goto remote_path_check; |
d00c28de | 3264 | } |
1bfe73c2 | 3265 | |
d82c2df5 | 3266 | /* tell server which Unix caps we support */ |
6848b733 | 3267 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3268 | /* reset of caps checks mount to see if unix extensions |
3269 | disabled for just this mount */ | |
2c6292ae | 3270 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3271 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3272 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3273 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3274 | rc = -EACCES; | |
3275 | goto mount_fail_check; | |
3276 | } | |
3277 | } else | |
d82c2df5 | 3278 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3279 | |
6848b733 SF |
3280 | /* do not care if following two calls succeed - informational */ |
3281 | if (!tcon->ipc) { | |
3282 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3283 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3284 | } | |
3285 | ||
f7910cbd | 3286 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
5eba8ab3 | 3287 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
f7910cbd | 3288 | |
66bfaadc JL |
3289 | /* tune readahead according to rsize */ |
3290 | cifs_sb->bdi.ra_pages = cifs_ra_pages(cifs_sb); | |
f7910cbd | 3291 | |
1bfe73c2 | 3292 | remote_path_check: |
c1508ca2 SF |
3293 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3294 | /* | |
3295 | * Perform an unconditional check for whether there are DFS | |
3296 | * referrals for this path without prefix, to provide support | |
3297 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3298 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3299 | * Chase the referral if found, otherwise continue normally. | |
3300 | */ | |
3301 | if (referral_walks_count == 0) { | |
3302 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3303 | cifs_sb, false); |
c1508ca2 SF |
3304 | if (!refrc) { |
3305 | referral_walks_count++; | |
3306 | goto try_mount_again; | |
3307 | } | |
3308 | } | |
3309 | #endif | |
3310 | ||
f87d39d9 | 3311 | /* check if a whole path is not remote */ |
70945643 | 3312 | if (!rc && tcon) { |
e4cce94c | 3313 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3314 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3315 | if (full_path == NULL) { |
3316 | rc = -ENOMEM; | |
3317 | goto mount_fail_check; | |
3318 | } | |
3319 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3320 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3321 | kfree(full_path); |
3322 | goto mount_fail_check; | |
3323 | } | |
3324 | kfree(full_path); | |
3325 | } | |
3326 | ||
1bfe73c2 IM |
3327 | /* get referral if needed */ |
3328 | if (rc == -EREMOTE) { | |
d036f50f | 3329 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3330 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3331 | /* | |
3332 | * BB: when we implement proper loop detection, | |
3333 | * we will remove this check. But now we need it | |
3334 | * to prevent an indefinite loop if 'DFS tree' is | |
3335 | * misconfigured (i.e. has loops). | |
3336 | */ | |
3337 | rc = -ELOOP; | |
3338 | goto mount_fail_check; | |
3339 | } | |
1bfe73c2 | 3340 | |
dd613945 | 3341 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3342 | true); |
7b91e266 | 3343 | |
dd613945 | 3344 | if (!rc) { |
5c2503a8 | 3345 | referral_walks_count++; |
1bfe73c2 IM |
3346 | goto try_mount_again; |
3347 | } | |
dd613945 | 3348 | goto mount_fail_check; |
d036f50f SF |
3349 | #else /* No DFS support, return error on mount */ |
3350 | rc = -EOPNOTSUPP; | |
3351 | #endif | |
1bfe73c2 IM |
3352 | } |
3353 | ||
9d002df4 JL |
3354 | if (rc) |
3355 | goto mount_fail_check; | |
3356 | ||
3357 | /* now, hang the tcon off of the superblock */ | |
3358 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3359 | if (tlink == NULL) { | |
3360 | rc = -ENOMEM; | |
3361 | goto mount_fail_check; | |
3362 | } | |
3363 | ||
b647c35f | 3364 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3365 | tlink->tl_tcon = tcon; |
3366 | tlink->tl_time = jiffies; | |
3367 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3368 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3369 | ||
b647c35f | 3370 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3371 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3372 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3373 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3374 | |
2de970ff JL |
3375 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
3376 | TLINK_IDLE_EXPIRE); | |
3377 | ||
1bfe73c2 IM |
3378 | mount_fail_check: |
3379 | /* on error free sesinfo and tcon struct if needed */ | |
3380 | if (rc) { | |
1bfe73c2 | 3381 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3382 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3383 | if (tcon) |
3384 | cifs_put_tcon(tcon); | |
3385 | else if (pSesInfo) | |
3386 | cifs_put_smb_ses(pSesInfo); | |
3387 | else | |
3388 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3389 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3390 | } |
3391 | ||
70fe7dc0 | 3392 | out: |
1da177e4 LT |
3393 | FreeXid(xid); |
3394 | return rc; | |
3395 | } | |
3396 | ||
8d1bca32 JL |
3397 | /* |
3398 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3399 | * pointer may be NULL. | |
3400 | */ | |
1da177e4 | 3401 | int |
96daf2b0 SF |
3402 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
3403 | const char *tree, struct cifs_tcon *tcon, | |
1da177e4 LT |
3404 | const struct nls_table *nls_codepage) |
3405 | { | |
3406 | struct smb_hdr *smb_buffer; | |
3407 | struct smb_hdr *smb_buffer_response; | |
3408 | TCONX_REQ *pSMB; | |
3409 | TCONX_RSP *pSMBr; | |
3410 | unsigned char *bcc_ptr; | |
3411 | int rc = 0; | |
690c522f JL |
3412 | int length; |
3413 | __u16 bytes_left, count; | |
1da177e4 LT |
3414 | |
3415 | if (ses == NULL) | |
3416 | return -EIO; | |
3417 | ||
3418 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3419 | if (smb_buffer == NULL) |
1da177e4 | 3420 | return -ENOMEM; |
ca43e3be | 3421 | |
1da177e4 LT |
3422 | smb_buffer_response = smb_buffer; |
3423 | ||
3424 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3425 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3426 | |
3427 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3428 | smb_buffer->Uid = ses->Suid; |
3429 | pSMB = (TCONX_REQ *) smb_buffer; | |
3430 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3431 | ||
3432 | pSMB->AndXCommand = 0xFF; | |
3433 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3434 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3435 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3436 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3437 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3438 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3439 | /* already aligned so no need to do it below */ |
eeac8047 | 3440 | } else { |
540b2e37 | 3441 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3442 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3443 | specified as required (when that support is added to | |
3444 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3445 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3446 | by Samba (not sure whether other servers allow |
3447 | NTLMv2 password here) */ | |
7c7b25bc | 3448 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3449 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3450 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3451 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3452 | ses->server->sec_mode & |
4e53a3fb JL |
3453 | SECMODE_PW_ENCRYPT ? true : false, |
3454 | bcc_ptr); | |
7c7b25bc SF |
3455 | else |
3456 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3457 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3458 | bcc_ptr, nls_codepage); |
eeac8047 | 3459 | |
540b2e37 | 3460 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3461 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3462 | /* must align unicode strings */ |
3463 | *bcc_ptr = 0; /* null byte password */ | |
3464 | bcc_ptr++; | |
3465 | } | |
eeac8047 | 3466 | } |
1da177e4 | 3467 | |
96daf2b0 | 3468 | if (ses->server->sec_mode & |
a878fb22 | 3469 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3470 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3471 | ||
3472 | if (ses->capabilities & CAP_STATUS32) { | |
3473 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3474 | } | |
3475 | if (ses->capabilities & CAP_DFS) { | |
3476 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3477 | } | |
3478 | if (ses->capabilities & CAP_UNICODE) { | |
3479 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3480 | length = | |
50c2f753 SF |
3481 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3482 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3483 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3484 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3485 | bcc_ptr += 2; /* skip trailing null */ |
3486 | } else { /* ASCII */ | |
1da177e4 LT |
3487 | strcpy(bcc_ptr, tree); |
3488 | bcc_ptr += strlen(tree) + 1; | |
3489 | } | |
3490 | strcpy(bcc_ptr, "?????"); | |
3491 | bcc_ptr += strlen("?????"); | |
3492 | bcc_ptr += 1; | |
3493 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3494 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3495 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3496 | pSMB->ByteCount = cpu_to_le16(count); |
3497 | ||
133672ef | 3498 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3499 | 0); |
1da177e4 | 3500 | |
1da177e4 LT |
3501 | /* above now done in SendReceive */ |
3502 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3503 | bool is_unicode; |
3504 | ||
1da177e4 | 3505 | tcon->tidStatus = CifsGood; |
3b795210 | 3506 | tcon->need_reconnect = false; |
1da177e4 LT |
3507 | tcon->tid = smb_buffer_response->Tid; |
3508 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3509 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3510 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3511 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3512 | is_unicode = true; | |
3513 | else | |
3514 | is_unicode = false; | |
3515 | ||
cc20c031 | 3516 | |
50c2f753 | 3517 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3518 | if (length == 3) { |
3519 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3520 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3521 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3522 | tcon->ipc = 1; |
3523 | } | |
3524 | } else if (length == 2) { | |
3525 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3526 | /* the most common case */ | |
b6b38f70 | 3527 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3528 | } |
3529 | } | |
50c2f753 | 3530 | bcc_ptr += length + 1; |
cc20c031 | 3531 | bytes_left -= (length + 1); |
1da177e4 | 3532 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3533 | |
3534 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3535 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3536 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3537 | bytes_left, is_unicode, |
cc20c031 JL |
3538 | nls_codepage); |
3539 | ||
b6b38f70 | 3540 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3541 | |
fb8c4b14 | 3542 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3543 | (smb_buffer_response->WordCount == 7)) |
3544 | /* field is in same location */ | |
3979877e SF |
3545 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3546 | else | |
3547 | tcon->Flags = 0; | |
b6b38f70 | 3548 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3549 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3550 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3551 | ses->ipc_tid = smb_buffer_response->Tid; |
3552 | } | |
3553 | ||
a8a11d39 | 3554 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3555 | return rc; |
3556 | } | |
3557 | ||
2a9b9951 AV |
3558 | void |
3559 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3560 | { |
b647c35f JL |
3561 | struct rb_root *root = &cifs_sb->tlink_tree; |
3562 | struct rb_node *node; | |
3563 | struct tcon_link *tlink; | |
9d002df4 | 3564 | |
2de970ff JL |
3565 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3566 | ||
b647c35f JL |
3567 | spin_lock(&cifs_sb->tlink_tree_lock); |
3568 | while ((node = rb_first(root))) { | |
3569 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3570 | cifs_get_tlink(tlink); | |
3571 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3572 | rb_erase(node, root); | |
1da177e4 | 3573 | |
b647c35f JL |
3574 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3575 | cifs_put_tlink(tlink); | |
3576 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3577 | } | |
3578 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3579 | |
dd854466 | 3580 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3581 | kfree(cifs_sb->mountdata); |
3582 | unload_nls(cifs_sb->local_nls); | |
3583 | kfree(cifs_sb); | |
50c2f753 | 3584 | } |
1da177e4 | 3585 | |
96daf2b0 | 3586 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
1da177e4 LT |
3587 | { |
3588 | int rc = 0; | |
198b5682 | 3589 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3590 | |
198b5682 JL |
3591 | /* only send once per connect */ |
3592 | if (server->maxBuf != 0) | |
3593 | return 0; | |
3594 | ||
3595 | rc = CIFSSMBNegotiate(xid, ses); | |
3596 | if (rc == -EAGAIN) { | |
3597 | /* retry only once on 1st time connection */ | |
3598 | rc = CIFSSMBNegotiate(xid, ses); | |
3599 | if (rc == -EAGAIN) | |
3600 | rc = -EHOSTDOWN; | |
1da177e4 | 3601 | } |
198b5682 JL |
3602 | if (rc == 0) { |
3603 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3604 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3605 | server->tcpStatus = CifsGood; |
3606 | else | |
3607 | rc = -EHOSTDOWN; | |
3608 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3609 | |
198b5682 JL |
3610 | } |
3611 | ||
3612 | return rc; | |
3613 | } | |
3614 | ||
3615 | ||
96daf2b0 | 3616 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
198b5682 JL |
3617 | struct nls_table *nls_info) |
3618 | { | |
3619 | int rc = 0; | |
3620 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3621 | |
198b5682 JL |
3622 | ses->flags = 0; |
3623 | ses->capabilities = server->capabilities; | |
26b994fa | 3624 | if (linuxExtEnabled == 0) |
198b5682 | 3625 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3626 | |
b6b38f70 | 3627 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 3628 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3629 | |
198b5682 | 3630 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3631 | if (rc) { |
b6b38f70 | 3632 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3633 | } else { |
5d0d2882 SP |
3634 | mutex_lock(&ses->server->srv_mutex); |
3635 | if (!server->session_estab) { | |
21e73393 | 3636 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3637 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3638 | server->sequence_number = 0x2; |
3639 | server->session_estab = true; | |
3640 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3641 | } |
3642 | mutex_unlock(&server->srv_mutex); | |
3643 | ||
b6b38f70 | 3644 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3645 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3646 | ses->status = CifsGood; |
3647 | ses->need_reconnect = false; | |
20418acd | 3648 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3649 | } |
26b994fa | 3650 | |
21e73393 SP |
3651 | kfree(ses->auth_key.response); |
3652 | ses->auth_key.response = NULL; | |
3653 | ses->auth_key.len = 0; | |
d3686d54 SP |
3654 | kfree(ses->ntlmssp); |
3655 | ses->ntlmssp = NULL; | |
21e73393 | 3656 | |
1da177e4 LT |
3657 | return rc; |
3658 | } | |
3659 | ||
96daf2b0 | 3660 | static struct cifs_tcon * |
9d002df4 JL |
3661 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3662 | { | |
96daf2b0 SF |
3663 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3664 | struct cifs_ses *ses; | |
3665 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3666 | struct smb_vol *vol_info; |
34c87901 SF |
3667 | char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */ |
3668 | /* We used to have this as MAX_USERNAME which is */ | |
3669 | /* way too big now (256 instead of 32) */ | |
9d002df4 JL |
3670 | |
3671 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3672 | if (vol_info == NULL) { | |
3673 | tcon = ERR_PTR(-ENOMEM); | |
3674 | goto out; | |
3675 | } | |
3676 | ||
ea1be1a3 | 3677 | snprintf(username, sizeof(username), "krb50x%x", fsuid); |
9d002df4 JL |
3678 | vol_info->username = username; |
3679 | vol_info->local_nls = cifs_sb->local_nls; | |
3680 | vol_info->linux_uid = fsuid; | |
3681 | vol_info->cred_uid = fsuid; | |
3682 | vol_info->UNC = master_tcon->treeName; | |
3683 | vol_info->retry = master_tcon->retry; | |
3684 | vol_info->nocase = master_tcon->nocase; | |
3685 | vol_info->local_lease = master_tcon->local_lease; | |
3686 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3687 | ||
3688 | /* FIXME: allow for other secFlg settings */ | |
3689 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3690 | ||
3691 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3692 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3693 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3694 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3695 | |
3696 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3697 | if (IS_ERR(ses)) { | |
96daf2b0 | 3698 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3699 | cifs_put_tcp_session(master_tcon->ses->server); |
3700 | goto out; | |
3701 | } | |
3702 | ||
3703 | tcon = cifs_get_tcon(ses, vol_info); | |
3704 | if (IS_ERR(tcon)) { | |
3705 | cifs_put_smb_ses(ses); | |
3706 | goto out; | |
3707 | } | |
3708 | ||
3709 | if (ses->capabilities & CAP_UNIX) | |
3710 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3711 | out: | |
3712 | kfree(vol_info); | |
3713 | ||
3714 | return tcon; | |
3715 | } | |
3716 | ||
96daf2b0 | 3717 | struct cifs_tcon * |
9d002df4 JL |
3718 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3719 | { | |
3720 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3721 | } | |
3722 | ||
3723 | static int | |
3724 | cifs_sb_tcon_pending_wait(void *unused) | |
3725 | { | |
3726 | schedule(); | |
3727 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3728 | } | |
3729 | ||
b647c35f JL |
3730 | /* find and return a tlink with given uid */ |
3731 | static struct tcon_link * | |
3732 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3733 | { | |
3734 | struct rb_node *node = root->rb_node; | |
3735 | struct tcon_link *tlink; | |
3736 | ||
3737 | while (node) { | |
3738 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3739 | ||
3740 | if (tlink->tl_uid > uid) | |
3741 | node = node->rb_left; | |
3742 | else if (tlink->tl_uid < uid) | |
3743 | node = node->rb_right; | |
3744 | else | |
3745 | return tlink; | |
3746 | } | |
3747 | return NULL; | |
3748 | } | |
3749 | ||
3750 | /* insert a tcon_link into the tree */ | |
3751 | static void | |
3752 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3753 | { | |
3754 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3755 | struct tcon_link *tlink; | |
3756 | ||
3757 | while (*new) { | |
3758 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3759 | parent = *new; | |
3760 | ||
3761 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3762 | new = &((*new)->rb_left); | |
3763 | else | |
3764 | new = &((*new)->rb_right); | |
3765 | } | |
3766 | ||
3767 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3768 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3769 | } | |
3770 | ||
9d002df4 JL |
3771 | /* |
3772 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3773 | * current task. | |
3774 | * | |
3775 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3776 | * the master tcon for the mount. | |
3777 | * | |
6ef933a3 | 3778 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3779 | * exists, then check to see if it's pending construction. If it is then wait |
3780 | * for construction to complete. Once it's no longer pending, check to see if | |
3781 | * it failed and either return an error or retry construction, depending on | |
3782 | * the timeout. | |
3783 | * | |
3784 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3785 | * try to construct a new one. | |
3786 | */ | |
3787 | struct tcon_link * | |
3788 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3789 | { | |
3790 | int ret; | |
b647c35f | 3791 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3792 | struct tcon_link *tlink, *newtlink; |
3793 | ||
3794 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3795 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3796 | ||
3797 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3798 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3799 | if (tlink) |
3800 | cifs_get_tlink(tlink); | |
3801 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3802 | ||
3803 | if (tlink == NULL) { | |
3804 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3805 | if (newtlink == NULL) | |
3806 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3807 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3808 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3809 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3810 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3811 | cifs_get_tlink(newtlink); | |
3812 | ||
9d002df4 JL |
3813 | spin_lock(&cifs_sb->tlink_tree_lock); |
3814 | /* was one inserted after previous search? */ | |
b647c35f | 3815 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3816 | if (tlink) { |
3817 | cifs_get_tlink(tlink); | |
3818 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3819 | kfree(newtlink); |
3820 | goto wait_for_construction; | |
3821 | } | |
9d002df4 | 3822 | tlink = newtlink; |
b647c35f JL |
3823 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3824 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3825 | } else { |
3826 | wait_for_construction: | |
3827 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3828 | cifs_sb_tcon_pending_wait, | |
3829 | TASK_INTERRUPTIBLE); | |
3830 | if (ret) { | |
3831 | cifs_put_tlink(tlink); | |
3832 | return ERR_PTR(ret); | |
3833 | } | |
3834 | ||
3835 | /* if it's good, return it */ | |
3836 | if (!IS_ERR(tlink->tl_tcon)) | |
3837 | return tlink; | |
3838 | ||
3839 | /* return error if we tried this already recently */ | |
3840 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3841 | cifs_put_tlink(tlink); | |
3842 | return ERR_PTR(-EACCES); | |
3843 | } | |
3844 | ||
3845 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3846 | goto wait_for_construction; | |
3847 | } | |
3848 | ||
3849 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3850 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3851 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3852 | ||
3853 | if (IS_ERR(tlink->tl_tcon)) { | |
3854 | cifs_put_tlink(tlink); | |
3855 | return ERR_PTR(-EACCES); | |
3856 | } | |
3857 | ||
3858 | return tlink; | |
3859 | } | |
2de970ff JL |
3860 | |
3861 | /* | |
3862 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3863 | * out tcons. | |
3864 | */ | |
3865 | static void | |
3866 | cifs_prune_tlinks(struct work_struct *work) | |
3867 | { | |
3868 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3869 | prune_tlinks.work); | |
b647c35f JL |
3870 | struct rb_root *root = &cifs_sb->tlink_tree; |
3871 | struct rb_node *node = rb_first(root); | |
3872 | struct rb_node *tmp; | |
3873 | struct tcon_link *tlink; | |
2de970ff | 3874 | |
b647c35f JL |
3875 | /* |
3876 | * Because we drop the spinlock in the loop in order to put the tlink | |
3877 | * it's not guarded against removal of links from the tree. The only | |
3878 | * places that remove entries from the tree are this function and | |
3879 | * umounts. Because this function is non-reentrant and is canceled | |
3880 | * before umount can proceed, this is safe. | |
3881 | */ | |
3882 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3883 | node = rb_first(root); | |
3884 | while (node != NULL) { | |
3885 | tmp = node; | |
3886 | node = rb_next(tmp); | |
3887 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3888 | ||
3889 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3890 | atomic_read(&tlink->tl_count) != 0 || | |
3891 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3892 | continue; | |
2de970ff | 3893 | |
b647c35f JL |
3894 | cifs_get_tlink(tlink); |
3895 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3896 | rb_erase(tmp, root); | |
3897 | ||
3898 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3899 | cifs_put_tlink(tlink); | |
3900 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3901 | } | |
3902 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3903 | |
3904 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3905 | TLINK_IDLE_EXPIRE); | |
3906 | } |