Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
8a8798a5 | 41 | #include <keys/user-type.h> |
0e2bedaa | 42 | #include <net/ipv6.h> |
1da177e4 LT |
43 | #include "cifspdu.h" |
44 | #include "cifsglob.h" | |
45 | #include "cifsproto.h" | |
46 | #include "cifs_unicode.h" | |
47 | #include "cifs_debug.h" | |
48 | #include "cifs_fs_sb.h" | |
49 | #include "ntlmssp.h" | |
50 | #include "nterr.h" | |
51 | #include "rfc1002pdu.h" | |
488f1d2d | 52 | #include "fscache.h" |
1da177e4 LT |
53 | |
54 | #define CIFS_PORT 445 | |
55 | #define RFC1001_PORT 139 | |
56 | ||
c74093b6 JL |
57 | /* SMB echo "timeout" -- FIXME: tunable? */ |
58 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
59 | ||
1da177e4 LT |
60 | extern mempool_t *cifs_req_poolp; |
61 | ||
2de970ff | 62 | /* FIXME: should these be tunable? */ |
9d002df4 | 63 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 64 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 65 | |
a9f1b85e PS |
66 | static int ip_connect(struct TCP_Server_Info *server); |
67 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 68 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 69 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
70 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
71 | const char *devname); | |
1da177e4 | 72 | |
d5c5605c JL |
73 | /* |
74 | * cifs tcp session reconnection | |
75 | * | |
76 | * mark tcp session as reconnecting so temporarily locked | |
77 | * mark all smb sessions as reconnecting for tcp session | |
78 | * reconnect tcp session | |
79 | * wake up waiters on reconnection? - (not needed currently) | |
80 | */ | |
2cd646a2 | 81 | static int |
1da177e4 LT |
82 | cifs_reconnect(struct TCP_Server_Info *server) |
83 | { | |
84 | int rc = 0; | |
f1987b44 | 85 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
86 | struct cifs_ses *ses; |
87 | struct cifs_tcon *tcon; | |
fb8c4b14 | 88 | struct mid_q_entry *mid_entry; |
3c1105df | 89 | struct list_head retry_list; |
50c2f753 | 90 | |
1da177e4 | 91 | spin_lock(&GlobalMid_Lock); |
469ee614 | 92 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 93 | /* the demux thread will exit normally |
1da177e4 LT |
94 | next time through the loop */ |
95 | spin_unlock(&GlobalMid_Lock); | |
96 | return rc; | |
97 | } else | |
98 | server->tcpStatus = CifsNeedReconnect; | |
99 | spin_unlock(&GlobalMid_Lock); | |
100 | server->maxBuf = 0; | |
101 | ||
b6b38f70 | 102 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
103 | |
104 | /* before reconnecting the tcp session, mark the smb session (uid) | |
105 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 106 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 107 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 108 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 109 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
110 | ses->need_reconnect = true; |
111 | ses->ipc_tid = 0; | |
f1987b44 | 112 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 113 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 114 | tcon->need_reconnect = true; |
1da177e4 | 115 | } |
1da177e4 | 116 | } |
3f9bcca7 | 117 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 118 | |
1da177e4 | 119 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 120 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 121 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 122 | if (server->ssocket) { |
b6b38f70 JP |
123 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
124 | server->ssocket->flags); | |
91cf45f0 | 125 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 126 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 127 | server->ssocket->state, |
b6b38f70 | 128 | server->ssocket->flags); |
1da177e4 LT |
129 | sock_release(server->ssocket); |
130 | server->ssocket = NULL; | |
131 | } | |
5d0d2882 SP |
132 | server->sequence_number = 0; |
133 | server->session_estab = false; | |
21e73393 SP |
134 | kfree(server->session_key.response); |
135 | server->session_key.response = NULL; | |
136 | server->session_key.len = 0; | |
fda35943 | 137 | server->lstrp = jiffies; |
2b84a36c | 138 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 139 | |
2b84a36c | 140 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
141 | INIT_LIST_HEAD(&retry_list); |
142 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 143 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
144 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
145 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
146 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
147 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
148 | list_move(&mid_entry->qhead, &retry_list); |
149 | } | |
150 | spin_unlock(&GlobalMid_Lock); | |
151 | ||
152 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
153 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
154 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
155 | list_del_init(&mid_entry->qhead); |
156 | mid_entry->callback(mid_entry); | |
1da177e4 | 157 | } |
1da177e4 | 158 | |
7fdbaa1b | 159 | do { |
6c3d8909 | 160 | try_to_freeze(); |
a9f1b85e PS |
161 | |
162 | /* we should try only the port we connected to before */ | |
163 | rc = generic_ip_connect(server); | |
fb8c4b14 | 164 | if (rc) { |
b6b38f70 | 165 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 166 | msleep(3000); |
1da177e4 LT |
167 | } else { |
168 | atomic_inc(&tcpSesReconnectCount); | |
169 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 170 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 171 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 172 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 173 | } |
7fdbaa1b | 174 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 175 | |
1da177e4 LT |
176 | return rc; |
177 | } | |
178 | ||
fb8c4b14 | 179 | /* |
e4eb295d SF |
180 | return codes: |
181 | 0 not a transact2, or all data present | |
182 | >0 transact2 with that much data missing | |
183 | -EINVAL = invalid transact2 | |
184 | ||
185 | */ | |
d4e4854f | 186 | static int check2ndT2(char *buf) |
e4eb295d | 187 | { |
d4e4854f | 188 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; |
fb8c4b14 | 189 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 190 | int remaining; |
26ec2548 | 191 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 192 | |
fb8c4b14 | 193 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
194 | return 0; |
195 | ||
fb8c4b14 SF |
196 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
197 | /* check for parm and data offset going beyond end of smb */ | |
198 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 199 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
200 | return -EINVAL; |
201 | } | |
202 | ||
203 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
204 | ||
26ec2548 JL |
205 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
206 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 207 | |
c0c7b905 | 208 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 209 | return 0; |
c0c7b905 | 210 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
211 | cFYI(1, "total data %d smaller than data in frame %d", |
212 | total_data_size, data_in_this_rsp); | |
e4eb295d | 213 | return -EINVAL; |
e4eb295d | 214 | } |
c0c7b905 JL |
215 | |
216 | remaining = total_data_size - data_in_this_rsp; | |
217 | ||
218 | cFYI(1, "missing %d bytes from transact2, check next response", | |
219 | remaining); | |
c974befa | 220 | if (total_data_size > CIFSMaxBufSize) { |
c0c7b905 | 221 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
c974befa | 222 | total_data_size, CIFSMaxBufSize); |
c0c7b905 JL |
223 | return -EINVAL; |
224 | } | |
225 | return remaining; | |
e4eb295d SF |
226 | } |
227 | ||
d4e4854f | 228 | static int coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) |
e4eb295d | 229 | { |
d4e4854f PS |
230 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; |
231 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
f5fffcee JL |
232 | char *data_area_of_tgt; |
233 | char *data_area_of_src; | |
26ec2548 | 234 | int remaining; |
f5fffcee JL |
235 | unsigned int byte_count, total_in_tgt; |
236 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
e4eb295d | 237 | |
f5fffcee JL |
238 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); |
239 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
e4eb295d | 240 | |
f5fffcee JL |
241 | if (tgt_total_cnt != src_total_cnt) |
242 | cFYI(1, "total data count of primary and secondary t2 differ " | |
243 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); | |
e4eb295d | 244 | |
f5fffcee | 245 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d | 246 | |
f5fffcee | 247 | remaining = tgt_total_cnt - total_in_tgt; |
50c2f753 | 248 | |
f5fffcee JL |
249 | if (remaining < 0) { |
250 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " | |
251 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); | |
2a2047bc | 252 | return -EPROTO; |
f5fffcee | 253 | } |
e4eb295d | 254 | |
f5fffcee JL |
255 | if (remaining == 0) { |
256 | /* nothing to do, ignore */ | |
257 | cFYI(1, "no more data remains"); | |
e4eb295d | 258 | return 0; |
f5fffcee | 259 | } |
50c2f753 | 260 | |
f5fffcee JL |
261 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); |
262 | if (remaining < total_in_src) | |
b6b38f70 | 263 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
264 | |
265 | /* find end of first SMB data area */ | |
f5fffcee | 266 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 267 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d | 268 | |
f5fffcee JL |
269 | /* validate target area */ |
270 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
271 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
e4eb295d | 272 | |
f5fffcee | 273 | data_area_of_tgt += total_in_tgt; |
e4eb295d | 274 | |
f5fffcee | 275 | total_in_tgt += total_in_src; |
2a2047bc | 276 | /* is the result too big for the field? */ |
f5fffcee JL |
277 | if (total_in_tgt > USHRT_MAX) { |
278 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); | |
2a2047bc | 279 | return -EPROTO; |
f5fffcee JL |
280 | } |
281 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
2a2047bc JL |
282 | |
283 | /* fix up the BCC */ | |
d4e4854f | 284 | byte_count = get_bcc(target_hdr); |
f5fffcee | 285 | byte_count += total_in_src; |
2a2047bc | 286 | /* is the result too big for the field? */ |
f5fffcee JL |
287 | if (byte_count > USHRT_MAX) { |
288 | cFYI(1, "coalesced BCC too large (%u)", byte_count); | |
2a2047bc | 289 | return -EPROTO; |
f5fffcee | 290 | } |
d4e4854f | 291 | put_bcc(byte_count, target_hdr); |
e4eb295d | 292 | |
d4e4854f | 293 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); |
f5fffcee | 294 | byte_count += total_in_src; |
2a2047bc | 295 | /* don't allow buffer to overflow */ |
f5fffcee JL |
296 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
297 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); | |
2a2047bc | 298 | return -ENOBUFS; |
f5fffcee | 299 | } |
d4e4854f | 300 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 301 | |
f5fffcee JL |
302 | /* copy second buffer into end of first buffer */ |
303 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
2a2047bc | 304 | |
f5fffcee JL |
305 | if (remaining != total_in_src) { |
306 | /* more responses to go */ | |
307 | cFYI(1, "waiting for more secondary responses"); | |
e4eb295d | 308 | return 1; |
f5fffcee JL |
309 | } |
310 | ||
311 | /* we are done */ | |
312 | cFYI(1, "found the last secondary response"); | |
313 | return 0; | |
e4eb295d SF |
314 | } |
315 | ||
c74093b6 JL |
316 | static void |
317 | cifs_echo_request(struct work_struct *work) | |
318 | { | |
319 | int rc; | |
320 | struct TCP_Server_Info *server = container_of(work, | |
321 | struct TCP_Server_Info, echo.work); | |
322 | ||
247ec9b4 | 323 | /* |
195291e6 JL |
324 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
325 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
326 | * we got a response recently | |
247ec9b4 | 327 | */ |
195291e6 | 328 | if (server->maxBuf == 0 || |
247ec9b4 | 329 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
330 | goto requeue_echo; |
331 | ||
332 | rc = CIFSSMBEcho(server); | |
333 | if (rc) | |
334 | cFYI(1, "Unable to send echo request to server: %s", | |
335 | server->hostname); | |
336 | ||
337 | requeue_echo: | |
da472fc8 | 338 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
339 | } |
340 | ||
3d9c2472 | 341 | static bool |
2a37ef94 | 342 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 343 | { |
2a37ef94 JL |
344 | if (!server->bigbuf) { |
345 | server->bigbuf = (char *)cifs_buf_get(); | |
346 | if (!server->bigbuf) { | |
3d9c2472 PS |
347 | cERROR(1, "No memory for large SMB response"); |
348 | msleep(3000); | |
349 | /* retry will check if exiting */ | |
350 | return false; | |
351 | } | |
2a37ef94 | 352 | } else if (server->large_buf) { |
3d9c2472 | 353 | /* we are reusing a dirty large buf, clear its start */ |
d4e4854f | 354 | memset(server->bigbuf, 0, header_size()); |
3d9c2472 PS |
355 | } |
356 | ||
2a37ef94 JL |
357 | if (!server->smallbuf) { |
358 | server->smallbuf = (char *)cifs_small_buf_get(); | |
359 | if (!server->smallbuf) { | |
3d9c2472 PS |
360 | cERROR(1, "No memory for SMB response"); |
361 | msleep(1000); | |
362 | /* retry will check if exiting */ | |
363 | return false; | |
364 | } | |
365 | /* beginning of smb buffer is cleared in our buf_get */ | |
366 | } else { | |
367 | /* if existing small buf clear beginning */ | |
d4e4854f | 368 | memset(server->smallbuf, 0, header_size()); |
3d9c2472 PS |
369 | } |
370 | ||
3d9c2472 PS |
371 | return true; |
372 | } | |
373 | ||
ba749e6d JL |
374 | static bool |
375 | server_unresponsive(struct TCP_Server_Info *server) | |
376 | { | |
6dae51a5 PS |
377 | /* |
378 | * We need to wait 2 echo intervals to make sure we handle such | |
379 | * situations right: | |
380 | * 1s client sends a normal SMB request | |
381 | * 2s client gets a response | |
382 | * 30s echo workqueue job pops, and decides we got a response recently | |
383 | * and don't need to send another | |
384 | * ... | |
385 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
386 | * a response in >60s. | |
387 | */ | |
388 | if (server->tcpStatus == CifsGood && | |
389 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
390 | cERROR(1, "Server %s has not responded in %d seconds. " |
391 | "Reconnecting...", server->hostname, | |
6dae51a5 | 392 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
393 | cifs_reconnect(server); |
394 | wake_up(&server->response_q); | |
395 | return true; | |
396 | } | |
397 | ||
398 | return false; | |
399 | } | |
400 | ||
42c4dfc2 JL |
401 | /* |
402 | * kvec_array_init - clone a kvec array, and advance into it | |
403 | * @new: pointer to memory for cloned array | |
404 | * @iov: pointer to original array | |
405 | * @nr_segs: number of members in original array | |
406 | * @bytes: number of bytes to advance into the cloned array | |
407 | * | |
408 | * This function will copy the array provided in iov to a section of memory | |
409 | * and advance the specified number of bytes into the new array. It returns | |
410 | * the number of segments in the new array. "new" must be at least as big as | |
411 | * the original iov array. | |
412 | */ | |
413 | static unsigned int | |
414 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
415 | size_t bytes) | |
416 | { | |
417 | size_t base = 0; | |
418 | ||
419 | while (bytes || !iov->iov_len) { | |
420 | int copy = min(bytes, iov->iov_len); | |
421 | ||
422 | bytes -= copy; | |
423 | base += copy; | |
424 | if (iov->iov_len == base) { | |
425 | iov++; | |
426 | nr_segs--; | |
427 | base = 0; | |
428 | } | |
429 | } | |
430 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
431 | new->iov_base += base; | |
432 | new->iov_len -= base; | |
433 | return nr_segs; | |
434 | } | |
435 | ||
1041e3f9 JL |
436 | static struct kvec * |
437 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 438 | { |
1041e3f9 JL |
439 | struct kvec *new_iov; |
440 | ||
441 | if (server->iov && nr_segs <= server->nr_iov) | |
442 | return server->iov; | |
443 | ||
444 | /* not big enough -- allocate a new one and release the old */ | |
445 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
446 | if (new_iov) { | |
447 | kfree(server->iov); | |
448 | server->iov = new_iov; | |
449 | server->nr_iov = nr_segs; | |
450 | } | |
451 | return new_iov; | |
452 | } | |
453 | ||
e28bc5b1 JL |
454 | int |
455 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
456 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 457 | { |
a52c1eb7 JL |
458 | int length = 0; |
459 | int total_read; | |
42c4dfc2 | 460 | unsigned int segs; |
e831e6cf | 461 | struct msghdr smb_msg; |
42c4dfc2 JL |
462 | struct kvec *iov; |
463 | ||
1041e3f9 | 464 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
465 | if (!iov) |
466 | return -ENOMEM; | |
e7015fb1 | 467 | |
e831e6cf JL |
468 | smb_msg.msg_control = NULL; |
469 | smb_msg.msg_controllen = 0; | |
470 | ||
a52c1eb7 | 471 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
472 | try_to_freeze(); |
473 | ||
ba749e6d | 474 | if (server_unresponsive(server)) { |
a52c1eb7 | 475 | total_read = -EAGAIN; |
ba749e6d JL |
476 | break; |
477 | } | |
478 | ||
42c4dfc2 JL |
479 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
480 | ||
481 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
482 | iov, segs, to_read, 0); | |
e7015fb1 | 483 | |
e7015fb1 | 484 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 485 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
486 | break; |
487 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
488 | cifs_reconnect(server); | |
a52c1eb7 | 489 | total_read = -EAGAIN; |
e7015fb1 PS |
490 | break; |
491 | } else if (length == -ERESTARTSYS || | |
492 | length == -EAGAIN || | |
493 | length == -EINTR) { | |
494 | /* | |
495 | * Minimum sleep to prevent looping, allowing socket | |
496 | * to clear and app threads to set tcpStatus | |
497 | * CifsNeedReconnect if server hung. | |
498 | */ | |
499 | usleep_range(1000, 2000); | |
500 | length = 0; | |
a52c1eb7 | 501 | continue; |
e7015fb1 | 502 | } else if (length <= 0) { |
a52c1eb7 JL |
503 | cFYI(1, "Received no data or error: expecting %d " |
504 | "got %d", to_read, length); | |
e7015fb1 | 505 | cifs_reconnect(server); |
a52c1eb7 | 506 | total_read = -EAGAIN; |
e7015fb1 PS |
507 | break; |
508 | } | |
509 | } | |
a52c1eb7 | 510 | return total_read; |
e7015fb1 | 511 | } |
e7015fb1 | 512 | |
e28bc5b1 JL |
513 | int |
514 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
515 | unsigned int to_read) | |
42c4dfc2 JL |
516 | { |
517 | struct kvec iov; | |
518 | ||
519 | iov.iov_base = buf; | |
520 | iov.iov_len = to_read; | |
521 | ||
e28bc5b1 | 522 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
523 | } |
524 | ||
98bac62c | 525 | static bool |
fe11e4cc | 526 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 527 | { |
98bac62c PS |
528 | /* |
529 | * The first byte big endian of the length field, | |
530 | * is actually not part of the length but the type | |
531 | * with the most common, zero, as regular data. | |
532 | */ | |
fe11e4cc JL |
533 | switch (type) { |
534 | case RFC1002_SESSION_MESSAGE: | |
535 | /* Regular SMB response */ | |
536 | return true; | |
537 | case RFC1002_SESSION_KEEP_ALIVE: | |
538 | cFYI(1, "RFC 1002 session keep alive"); | |
539 | break; | |
540 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
541 | cFYI(1, "RFC 1002 positive session response"); | |
542 | break; | |
543 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
544 | /* |
545 | * We get this from Windows 98 instead of an error on | |
546 | * SMB negprot response. | |
547 | */ | |
fe11e4cc | 548 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
549 | /* give server a second to clean up */ |
550 | msleep(1000); | |
551 | /* | |
552 | * Always try 445 first on reconnect since we get NACK | |
553 | * on some if we ever connected to port 139 (the NACK | |
554 | * is since we do not begin with RFC1001 session | |
555 | * initialize frame). | |
556 | */ | |
fe11e4cc | 557 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
558 | cifs_reconnect(server); |
559 | wake_up(&server->response_q); | |
fe11e4cc JL |
560 | break; |
561 | default: | |
562 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 563 | cifs_reconnect(server); |
98bac62c PS |
564 | } |
565 | ||
fe11e4cc | 566 | return false; |
98bac62c PS |
567 | } |
568 | ||
ad69bae1 | 569 | static struct mid_q_entry * |
d4e4854f | 570 | find_mid(struct TCP_Server_Info *server, char *buffer) |
ad69bae1 | 571 | { |
d4e4854f | 572 | struct smb_hdr *buf = (struct smb_hdr *)buffer; |
ea1f4502 | 573 | struct mid_q_entry *mid; |
ad69bae1 PS |
574 | |
575 | spin_lock(&GlobalMid_Lock); | |
ea1f4502 JL |
576 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
577 | if (mid->mid == buf->Mid && | |
7c9421e1 PS |
578 | mid->mid_state == MID_REQUEST_SUBMITTED && |
579 | le16_to_cpu(mid->command) == buf->Command) { | |
ea1f4502 JL |
580 | spin_unlock(&GlobalMid_Lock); |
581 | return mid; | |
ad69bae1 | 582 | } |
ea1f4502 JL |
583 | } |
584 | spin_unlock(&GlobalMid_Lock); | |
585 | return NULL; | |
586 | } | |
587 | ||
e28bc5b1 JL |
588 | void |
589 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 590 | { |
ad69bae1 | 591 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 592 | mid->when_received = jiffies; |
ad69bae1 | 593 | #endif |
ea1f4502 JL |
594 | spin_lock(&GlobalMid_Lock); |
595 | if (!malformed) | |
7c9421e1 | 596 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 597 | else |
7c9421e1 | 598 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 599 | list_del_init(&mid->qhead); |
ad69bae1 | 600 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 601 | } |
ad69bae1 | 602 | |
c8054ebd JL |
603 | static void |
604 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 605 | char *buf, int malformed) |
ea1f4502 | 606 | { |
ffc00e27 JL |
607 | if (malformed == 0 && check2ndT2(buf) > 0) { |
608 | mid->multiRsp = true; | |
ea1f4502 JL |
609 | if (mid->resp_buf) { |
610 | /* merge response - fix up 1st*/ | |
ffc00e27 JL |
611 | malformed = coalesce_t2(buf, mid->resp_buf); |
612 | if (malformed > 0) | |
c8054ebd | 613 | return; |
ffc00e27 | 614 | |
ea1f4502 JL |
615 | /* All parts received or packet is malformed. */ |
616 | mid->multiEnd = true; | |
c8054ebd | 617 | return dequeue_mid(mid, malformed); |
ea1f4502 | 618 | } |
2a37ef94 | 619 | if (!server->large_buf) { |
ea1f4502 JL |
620 | /*FIXME: switch to already allocated largebuf?*/ |
621 | cERROR(1, "1st trans2 resp needs bigbuf"); | |
622 | } else { | |
623 | /* Have first buffer */ | |
624 | mid->resp_buf = buf; | |
7c9421e1 | 625 | mid->large_buf = true; |
2a37ef94 | 626 | server->bigbuf = NULL; |
ea1f4502 | 627 | } |
c8054ebd | 628 | return; |
ea1f4502 JL |
629 | } |
630 | mid->resp_buf = buf; | |
7c9421e1 | 631 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
632 | /* Was previous buf put in mpx struct for multi-rsp? */ |
633 | if (!mid->multiRsp) { | |
634 | /* smb buffer will be freed by user thread */ | |
635 | if (server->large_buf) | |
636 | server->bigbuf = NULL; | |
637 | else | |
638 | server->smallbuf = NULL; | |
639 | } | |
ffc00e27 | 640 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
641 | } |
642 | ||
762dfd10 PS |
643 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
644 | { | |
645 | int length; | |
646 | ||
647 | /* take it off the list, if it's not already */ | |
648 | spin_lock(&cifs_tcp_ses_lock); | |
649 | list_del_init(&server->tcp_ses_list); | |
650 | spin_unlock(&cifs_tcp_ses_lock); | |
651 | ||
652 | spin_lock(&GlobalMid_Lock); | |
653 | server->tcpStatus = CifsExiting; | |
654 | spin_unlock(&GlobalMid_Lock); | |
655 | wake_up_all(&server->response_q); | |
656 | ||
2d86dbc9 | 657 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 658 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
659 | if (server->credits <= 0) |
660 | server->credits = 1; | |
fc40f9cf | 661 | spin_unlock(&server->req_lock); |
762dfd10 PS |
662 | /* |
663 | * Although there should not be any requests blocked on this queue it | |
664 | * can not hurt to be paranoid and try to wake up requests that may | |
665 | * haven been blocked when more than 50 at time were on the wire to the | |
666 | * same server - they now will see the session is in exit state and get | |
667 | * out of SendReceive. | |
668 | */ | |
669 | wake_up_all(&server->request_q); | |
670 | /* give those requests time to exit */ | |
671 | msleep(125); | |
672 | ||
673 | if (server->ssocket) { | |
674 | sock_release(server->ssocket); | |
675 | server->ssocket = NULL; | |
676 | } | |
677 | ||
678 | if (!list_empty(&server->pending_mid_q)) { | |
679 | struct list_head dispose_list; | |
680 | struct mid_q_entry *mid_entry; | |
681 | struct list_head *tmp, *tmp2; | |
682 | ||
683 | INIT_LIST_HEAD(&dispose_list); | |
684 | spin_lock(&GlobalMid_Lock); | |
685 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
686 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
687 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
688 | mid_entry->mid_state = MID_SHUTDOWN; | |
762dfd10 PS |
689 | list_move(&mid_entry->qhead, &dispose_list); |
690 | } | |
691 | spin_unlock(&GlobalMid_Lock); | |
692 | ||
693 | /* now walk dispose list and issue callbacks */ | |
694 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
695 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 | 696 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
762dfd10 PS |
697 | list_del_init(&mid_entry->qhead); |
698 | mid_entry->callback(mid_entry); | |
699 | } | |
700 | /* 1/8th of sec is more than enough time for them to exit */ | |
701 | msleep(125); | |
702 | } | |
703 | ||
704 | if (!list_empty(&server->pending_mid_q)) { | |
705 | /* | |
706 | * mpx threads have not exited yet give them at least the smb | |
707 | * send timeout time for long ops. | |
708 | * | |
709 | * Due to delays on oplock break requests, we need to wait at | |
710 | * least 45 seconds before giving up on a request getting a | |
711 | * response and going ahead and killing cifsd. | |
712 | */ | |
713 | cFYI(1, "Wait for exit from demultiplex thread"); | |
714 | msleep(46000); | |
715 | /* | |
716 | * If threads still have not exited they are probably never | |
717 | * coming home not much else we can do but free the memory. | |
718 | */ | |
719 | } | |
720 | ||
721 | kfree(server->hostname); | |
1041e3f9 | 722 | kfree(server->iov); |
762dfd10 PS |
723 | kfree(server); |
724 | ||
725 | length = atomic_dec_return(&tcpSesAllocCount); | |
726 | if (length > 0) | |
727 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
728 | GFP_KERNEL); | |
729 | } | |
730 | ||
e9097ab4 JL |
731 | static int |
732 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
733 | { | |
734 | int length; | |
735 | char *buf = server->smallbuf; | |
d4e4854f | 736 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
737 | |
738 | /* make sure this will fit in a large buffer */ | |
d4e4854f | 739 | if (pdu_length > CIFSMaxBufSize + max_header_size() - 4) { |
e9097ab4 JL |
740 | cERROR(1, "SMB response too long (%u bytes)", |
741 | pdu_length); | |
742 | cifs_reconnect(server); | |
743 | wake_up(&server->response_q); | |
744 | return -EAGAIN; | |
745 | } | |
746 | ||
747 | /* switch to large buffer if too big for a small one */ | |
748 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
749 | server->large_buf = true; | |
d4e4854f | 750 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 751 | buf = server->bigbuf; |
e9097ab4 JL |
752 | } |
753 | ||
754 | /* now read the rest */ | |
d4e4854f PS |
755 | length = cifs_read_from_socket(server, buf + header_size() - 1, |
756 | pdu_length - header_size() + 1 + 4); | |
e9097ab4 JL |
757 | if (length < 0) |
758 | return length; | |
759 | server->total_read += length; | |
760 | ||
d4e4854f | 761 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
762 | |
763 | /* | |
764 | * We know that we received enough to get to the MID as we | |
765 | * checked the pdu_length earlier. Now check to see | |
766 | * if the rest of the header is OK. We borrow the length | |
767 | * var for the rest of the loop to avoid a new stack var. | |
768 | * | |
769 | * 48 bytes is enough to display the header and a little bit | |
770 | * into the payload for debugging purposes. | |
771 | */ | |
d4e4854f | 772 | length = checkSMB(buf, server->total_read); |
e9097ab4 JL |
773 | if (length != 0) |
774 | cifs_dump_mem("Bad SMB: ", buf, | |
775 | min_t(unsigned int, server->total_read, 48)); | |
776 | ||
ff4fa4a2 JL |
777 | if (!mid) |
778 | return length; | |
e9097ab4 | 779 | |
d4e4854f | 780 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 781 | return 0; |
e9097ab4 JL |
782 | } |
783 | ||
1da177e4 | 784 | static int |
7c97c200 | 785 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
786 | { |
787 | int length; | |
7c97c200 | 788 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
789 | unsigned int pdu_length; |
790 | char *buf = NULL; | |
1da177e4 LT |
791 | struct task_struct *task_to_wake = NULL; |
792 | struct mid_q_entry *mid_entry; | |
1da177e4 | 793 | |
1da177e4 | 794 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 795 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
796 | |
797 | length = atomic_inc_return(&tcpSesAllocCount); | |
798 | if (length > 1) | |
26f57364 SF |
799 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
800 | GFP_KERNEL); | |
1da177e4 | 801 | |
83144186 | 802 | set_freezable(); |
469ee614 | 803 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
804 | if (try_to_freeze()) |
805 | continue; | |
b8643e1b | 806 | |
2a37ef94 | 807 | if (!allocate_buffers(server)) |
3d9c2472 | 808 | continue; |
b8643e1b | 809 | |
2a37ef94 | 810 | server->large_buf = false; |
2a37ef94 | 811 | buf = server->smallbuf; |
f01d5e14 | 812 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 813 | |
e28bc5b1 | 814 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 815 | if (length < 0) |
1da177e4 | 816 | continue; |
2a37ef94 | 817 | server->total_read = length; |
1da177e4 | 818 | |
98bac62c PS |
819 | /* |
820 | * The right amount was read from socket - 4 bytes, | |
821 | * so we can now interpret the length field. | |
822 | */ | |
d4e4854f | 823 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 824 | |
fe11e4cc JL |
825 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
826 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 827 | continue; |
e4eb295d | 828 | |
89482a56 | 829 | /* make sure we have enough to get to the MID */ |
d4e4854f | 830 | if (pdu_length < header_size() - 1 - 4) { |
89482a56 JL |
831 | cERROR(1, "SMB response too short (%u bytes)", |
832 | pdu_length); | |
833 | cifs_reconnect(server); | |
834 | wake_up(&server->response_q); | |
835 | continue; | |
e4eb295d | 836 | } |
e7015fb1 | 837 | |
89482a56 | 838 | /* read down to the MID */ |
e28bc5b1 | 839 | length = cifs_read_from_socket(server, buf + 4, |
d4e4854f | 840 | header_size() - 1 - 4); |
89482a56 | 841 | if (length < 0) |
e4eb295d | 842 | continue; |
2a37ef94 | 843 | server->total_read += length; |
1da177e4 | 844 | |
d4e4854f | 845 | mid_entry = find_mid(server, buf); |
50c2f753 | 846 | |
44d22d84 JL |
847 | if (!mid_entry || !mid_entry->receive) |
848 | length = standard_receive3(server, mid_entry); | |
849 | else | |
850 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 851 | |
e9097ab4 | 852 | if (length < 0) |
fe11e4cc | 853 | continue; |
1da177e4 | 854 | |
d4e4854f | 855 | if (server->large_buf) |
2a37ef94 | 856 | buf = server->bigbuf; |
fda35943 | 857 | |
fda35943 | 858 | server->lstrp = jiffies; |
2b84a36c | 859 | if (mid_entry != NULL) { |
2a37ef94 JL |
860 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
861 | mid_entry->callback(mid_entry); | |
d4e4854f | 862 | } else if (!is_valid_oplock_break(buf, server)) { |
b6b38f70 | 863 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 864 | "NumMids %d", atomic_read(&midCount)); |
d4e4854f | 865 | cifs_dump_mem("Received Data is: ", buf, header_size()); |
3979877e | 866 | #ifdef CONFIG_CIFS_DEBUG2 |
d4e4854f | 867 | cifs_dump_detail(buf); |
3979877e SF |
868 | cifs_dump_mids(server); |
869 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 870 | |
e4eb295d SF |
871 | } |
872 | } /* end while !EXITING */ | |
873 | ||
fd62cb7e | 874 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
875 | cifs_buf_release(server->bigbuf); |
876 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
877 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 878 | |
b1c8d2b4 | 879 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 880 | clean_demultiplex_info(server); |
50c2f753 | 881 | |
b1c8d2b4 JL |
882 | /* if server->tsk was NULL then wait for a signal before exiting */ |
883 | if (!task_to_wake) { | |
884 | set_current_state(TASK_INTERRUPTIBLE); | |
885 | while (!signal_pending(current)) { | |
886 | schedule(); | |
887 | set_current_state(TASK_INTERRUPTIBLE); | |
888 | } | |
889 | set_current_state(TASK_RUNNING); | |
890 | } | |
891 | ||
0468a2cf | 892 | module_put_and_exit(0); |
1da177e4 LT |
893 | } |
894 | ||
c359cf3c JL |
895 | /* extract the host portion of the UNC string */ |
896 | static char * | |
897 | extract_hostname(const char *unc) | |
898 | { | |
899 | const char *src; | |
900 | char *dst, *delim; | |
901 | unsigned int len; | |
902 | ||
903 | /* skip double chars at beginning of string */ | |
904 | /* BB: check validity of these bytes? */ | |
905 | src = unc + 2; | |
906 | ||
907 | /* delimiter between hostname and sharename is always '\\' now */ | |
908 | delim = strchr(src, '\\'); | |
909 | if (!delim) | |
910 | return ERR_PTR(-EINVAL); | |
911 | ||
912 | len = delim - src; | |
913 | dst = kmalloc((len + 1), GFP_KERNEL); | |
914 | if (dst == NULL) | |
915 | return ERR_PTR(-ENOMEM); | |
916 | ||
917 | memcpy(dst, src, len); | |
918 | dst[len] = '\0'; | |
919 | ||
920 | return dst; | |
921 | } | |
922 | ||
1da177e4 | 923 | static int |
b946845a | 924 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 925 | struct smb_vol *vol) |
1da177e4 | 926 | { |
4906e50b | 927 | char *value, *data, *end; |
957df453 | 928 | char *mountdata_copy = NULL, *options; |
3d3ea8e6 | 929 | int err; |
1da177e4 LT |
930 | unsigned int temp_len, i, j; |
931 | char separator[2]; | |
9b9d6b24 JL |
932 | short int override_uid = -1; |
933 | short int override_gid = -1; | |
934 | bool uid_specified = false; | |
935 | bool gid_specified = false; | |
88463999 | 936 | char *nodename = utsname()->nodename; |
1da177e4 LT |
937 | |
938 | separator[0] = ','; | |
50c2f753 | 939 | separator[1] = 0; |
1da177e4 | 940 | |
88463999 JL |
941 | /* |
942 | * does not have to be perfect mapping since field is | |
943 | * informational, only used for servers that do not support | |
944 | * port 445 and it can be overridden at mount time | |
945 | */ | |
1397f2ee JL |
946 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
947 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
948 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
949 | ||
1397f2ee | 950 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
951 | /* null target name indicates to use *SMBSERVR default called name |
952 | if we end up sending RFC1001 session initialize */ | |
953 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
954 | vol->cred_uid = current_uid(); |
955 | vol->linux_uid = current_uid(); | |
a001e5b5 | 956 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
957 | |
958 | /* default to only allowing write access to owner of the mount */ | |
959 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
960 | |
961 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
962 | /* default is always to request posix paths. */ |
963 | vol->posix_paths = 1; | |
a0c9217f JL |
964 | /* default to using server inode numbers where available */ |
965 | vol->server_ino = 1; | |
ac67055e | 966 | |
6d20e840 SJ |
967 | vol->actimeo = CIFS_DEF_ACTIMEO; |
968 | ||
b946845a SF |
969 | if (!mountdata) |
970 | goto cifs_parse_mount_err; | |
971 | ||
972 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
973 | if (!mountdata_copy) | |
974 | goto cifs_parse_mount_err; | |
1da177e4 | 975 | |
b946845a | 976 | options = mountdata_copy; |
4906e50b | 977 | end = options + strlen(options); |
50c2f753 | 978 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 979 | if (options[4] != 0) { |
1da177e4 LT |
980 | separator[0] = options[4]; |
981 | options += 5; | |
982 | } else { | |
b6b38f70 | 983 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
984 | } |
985 | } | |
3d3ea8e6 SP |
986 | vol->backupuid_specified = false; /* no backup intent for a user */ |
987 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 988 | |
1da177e4 LT |
989 | while ((data = strsep(&options, separator)) != NULL) { |
990 | if (!*data) | |
991 | continue; | |
992 | if ((value = strchr(data, '=')) != NULL) | |
993 | *value++ = '\0'; | |
994 | ||
50c2f753 SF |
995 | /* Have to parse this before we parse for "user" */ |
996 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 997 | vol->no_xattr = 0; |
50c2f753 | 998 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
999 | vol->no_xattr = 1; |
1000 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 1001 | if (!value) { |
1da177e4 LT |
1002 | printk(KERN_WARNING |
1003 | "CIFS: invalid or missing username\n"); | |
b946845a | 1004 | goto cifs_parse_mount_err; |
fb8c4b14 | 1005 | } else if (!*value) { |
4b952a9b SF |
1006 | /* null user, ie anonymous, authentication */ |
1007 | vol->nullauth = 1; | |
1da177e4 | 1008 | } |
8727c8a8 SF |
1009 | if (strnlen(value, MAX_USERNAME_SIZE) < |
1010 | MAX_USERNAME_SIZE) { | |
b946845a SF |
1011 | vol->username = kstrdup(value, GFP_KERNEL); |
1012 | if (!vol->username) { | |
1013 | printk(KERN_WARNING "CIFS: no memory " | |
1014 | "for username\n"); | |
1015 | goto cifs_parse_mount_err; | |
1016 | } | |
1da177e4 LT |
1017 | } else { |
1018 | printk(KERN_WARNING "CIFS: username too long\n"); | |
b946845a | 1019 | goto cifs_parse_mount_err; |
1da177e4 LT |
1020 | } |
1021 | } else if (strnicmp(data, "pass", 4) == 0) { | |
1022 | if (!value) { | |
1023 | vol->password = NULL; | |
1024 | continue; | |
fb8c4b14 | 1025 | } else if (value[0] == 0) { |
1da177e4 LT |
1026 | /* check if string begins with double comma |
1027 | since that would mean the password really | |
1028 | does start with a comma, and would not | |
1029 | indicate an empty string */ | |
fb8c4b14 | 1030 | if (value[1] != separator[0]) { |
1da177e4 LT |
1031 | vol->password = NULL; |
1032 | continue; | |
1033 | } | |
1034 | } | |
1035 | temp_len = strlen(value); | |
1036 | /* removed password length check, NTLM passwords | |
1037 | can be arbitrarily long */ | |
1038 | ||
50c2f753 | 1039 | /* if comma in password, the string will be |
1da177e4 LT |
1040 | prematurely null terminated. Commas in password are |
1041 | specified across the cifs mount interface by a double | |
1042 | comma ie ,, and a comma used as in other cases ie ',' | |
1043 | as a parameter delimiter/separator is single and due | |
1044 | to the strsep above is temporarily zeroed. */ | |
1045 | ||
1046 | /* NB: password legally can have multiple commas and | |
1047 | the only illegal character in a password is null */ | |
1048 | ||
50c2f753 | 1049 | if ((value[temp_len] == 0) && |
4906e50b | 1050 | (value + temp_len < end) && |
09d1db5c | 1051 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
1052 | /* reinsert comma */ |
1053 | value[temp_len] = separator[0]; | |
50c2f753 SF |
1054 | temp_len += 2; /* move after second comma */ |
1055 | while (value[temp_len] != 0) { | |
1da177e4 | 1056 | if (value[temp_len] == separator[0]) { |
50c2f753 | 1057 | if (value[temp_len+1] == |
09d1db5c SF |
1058 | separator[0]) { |
1059 | /* skip second comma */ | |
1060 | temp_len++; | |
50c2f753 | 1061 | } else { |
1da177e4 LT |
1062 | /* single comma indicating start |
1063 | of next parm */ | |
1064 | break; | |
1065 | } | |
1066 | } | |
1067 | temp_len++; | |
1068 | } | |
fb8c4b14 | 1069 | if (value[temp_len] == 0) { |
1da177e4 LT |
1070 | options = NULL; |
1071 | } else { | |
1072 | value[temp_len] = 0; | |
1073 | /* point option to start of next parm */ | |
1074 | options = value + temp_len + 1; | |
1075 | } | |
50c2f753 | 1076 | /* go from value to value + temp_len condensing |
1da177e4 LT |
1077 | double commas to singles. Note that this ends up |
1078 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 1079 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 1080 | if (vol->password == NULL) { |
50c2f753 SF |
1081 | printk(KERN_WARNING "CIFS: no memory " |
1082 | "for password\n"); | |
b946845a | 1083 | goto cifs_parse_mount_err; |
433dc24f | 1084 | } |
50c2f753 | 1085 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 1086 | vol->password[j] = value[i]; |
fb8c4b14 | 1087 | if (value[i] == separator[0] |
09d1db5c | 1088 | && value[i+1] == separator[0]) { |
1da177e4 LT |
1089 | /* skip second comma */ |
1090 | i++; | |
1091 | } | |
1092 | } | |
1093 | vol->password[j] = 0; | |
1094 | } else { | |
e915fc49 | 1095 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 1096 | if (vol->password == NULL) { |
50c2f753 SF |
1097 | printk(KERN_WARNING "CIFS: no memory " |
1098 | "for password\n"); | |
b946845a | 1099 | goto cifs_parse_mount_err; |
433dc24f | 1100 | } |
1da177e4 LT |
1101 | strcpy(vol->password, value); |
1102 | } | |
58f7f68f JL |
1103 | } else if (!strnicmp(data, "ip", 2) || |
1104 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
1105 | if (!value || !*value) { |
1106 | vol->UNCip = NULL; | |
50b64e3b JL |
1107 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
1108 | INET6_ADDRSTRLEN) { | |
b946845a SF |
1109 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
1110 | if (!vol->UNCip) { | |
1111 | printk(KERN_WARNING "CIFS: no memory " | |
1112 | "for UNC IP\n"); | |
1113 | goto cifs_parse_mount_err; | |
1114 | } | |
1da177e4 | 1115 | } else { |
50c2f753 SF |
1116 | printk(KERN_WARNING "CIFS: ip address " |
1117 | "too long\n"); | |
b946845a | 1118 | goto cifs_parse_mount_err; |
1da177e4 | 1119 | } |
50c2f753 SF |
1120 | } else if (strnicmp(data, "sec", 3) == 0) { |
1121 | if (!value || !*value) { | |
b6b38f70 | 1122 | cERROR(1, "no security value specified"); |
50c2f753 SF |
1123 | continue; |
1124 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
1125 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 1126 | CIFSSEC_MUST_SIGN; |
bf820679 | 1127 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
1128 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
1129 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 1130 | cERROR(1, "Krb5 cifs privacy not supported"); |
b946845a | 1131 | goto cifs_parse_mount_err; |
bf820679 | 1132 | } else if (strnicmp(value, "krb5", 4) == 0) { |
750d1151 | 1133 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
1134 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
1135 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1136 | CIFSSEC_MUST_SIGN; | |
1137 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1138 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1139 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1140 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1141 | CIFSSEC_MUST_SIGN; |
bf820679 | 1142 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1143 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1144 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1145 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1146 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1147 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1148 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1149 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1150 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1151 | /* BB is there a better way to do this? */ |
750d1151 | 1152 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1153 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1154 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1155 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1156 | #endif |
bf820679 | 1157 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1158 | vol->nullauth = 1; |
50c2f753 | 1159 | } else { |
b6b38f70 | 1160 | cERROR(1, "bad security option: %s", value); |
b946845a | 1161 | goto cifs_parse_mount_err; |
50c2f753 | 1162 | } |
1cb06d0b SF |
1163 | } else if (strnicmp(data, "vers", 3) == 0) { |
1164 | if (!value || !*value) { | |
1165 | cERROR(1, "no protocol version specified" | |
1166 | " after vers= mount option"); | |
1167 | } else if ((strnicmp(value, "cifs", 4) == 0) || | |
1168 | (strnicmp(value, "1", 1) == 0)) { | |
1169 | /* this is the default */ | |
1170 | continue; | |
1cb06d0b | 1171 | } |
1da177e4 LT |
1172 | } else if ((strnicmp(data, "unc", 3) == 0) |
1173 | || (strnicmp(data, "target", 6) == 0) | |
1174 | || (strnicmp(data, "path", 4) == 0)) { | |
1175 | if (!value || !*value) { | |
50c2f753 SF |
1176 | printk(KERN_WARNING "CIFS: invalid path to " |
1177 | "network resource\n"); | |
b946845a | 1178 | goto cifs_parse_mount_err; |
1da177e4 LT |
1179 | } |
1180 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1181 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1182 | if (vol->UNC == NULL) |
b946845a | 1183 | goto cifs_parse_mount_err; |
50c2f753 | 1184 | strcpy(vol->UNC, value); |
1da177e4 LT |
1185 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1186 | vol->UNC[0] = '\\'; | |
1187 | vol->UNC[1] = '\\'; | |
50c2f753 | 1188 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1189 | printk(KERN_WARNING |
50c2f753 SF |
1190 | "CIFS: UNC Path does not begin " |
1191 | "with // or \\\\ \n"); | |
b946845a | 1192 | goto cifs_parse_mount_err; |
1da177e4 LT |
1193 | } |
1194 | } else { | |
1195 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1196 | goto cifs_parse_mount_err; |
1da177e4 LT |
1197 | } |
1198 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1199 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1200 | if (!value || !*value) { | |
1201 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
b946845a | 1202 | goto cifs_parse_mount_err; |
1da177e4 LT |
1203 | } |
1204 | /* BB are there cases in which a comma can be valid in | |
1205 | a domain name and need special handling? */ | |
3979877e | 1206 | if (strnlen(value, 256) < 256) { |
b946845a SF |
1207 | vol->domainname = kstrdup(value, GFP_KERNEL); |
1208 | if (!vol->domainname) { | |
1209 | printk(KERN_WARNING "CIFS: no memory " | |
1210 | "for domainname\n"); | |
1211 | goto cifs_parse_mount_err; | |
1212 | } | |
b6b38f70 | 1213 | cFYI(1, "Domain name set"); |
1da177e4 | 1214 | } else { |
50c2f753 SF |
1215 | printk(KERN_WARNING "CIFS: domain name too " |
1216 | "long\n"); | |
b946845a | 1217 | goto cifs_parse_mount_err; |
1da177e4 | 1218 | } |
3eb9a889 BG |
1219 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1220 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1221 | ||
1222 | if (!value || !*value) { | |
1223 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1224 | " not specified.\n"); | |
b946845a | 1225 | goto cifs_parse_mount_err; |
3eb9a889 BG |
1226 | } |
1227 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1228 | value, strlen(value)); | |
b235f371 | 1229 | if (i == 0) { |
3eb9a889 BG |
1230 | printk(KERN_WARNING "CIFS: Could not parse" |
1231 | " srcaddr: %s\n", | |
1232 | value); | |
b946845a | 1233 | goto cifs_parse_mount_err; |
3eb9a889 | 1234 | } |
50c2f753 SF |
1235 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1236 | if (!value || !*value) { | |
1237 | printk(KERN_WARNING | |
1238 | "CIFS: invalid path prefix\n"); | |
b946845a | 1239 | goto cifs_parse_mount_err; |
50c2f753 SF |
1240 | } |
1241 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1242 | if (value[0] != '/') |
2fe87f02 | 1243 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1244 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1245 | if (vol->prepath == NULL) | |
b946845a | 1246 | goto cifs_parse_mount_err; |
4523cc30 | 1247 | if (value[0] != '/') { |
2fe87f02 | 1248 | vol->prepath[0] = '/'; |
50c2f753 | 1249 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1250 | } else |
50c2f753 | 1251 | strcpy(vol->prepath, value); |
b6b38f70 | 1252 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1253 | } else { |
1254 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
b946845a | 1255 | goto cifs_parse_mount_err; |
50c2f753 | 1256 | } |
1da177e4 LT |
1257 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1258 | if (!value || !*value) { | |
63135e08 SF |
1259 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1260 | "specified\n"); | |
b946845a | 1261 | goto cifs_parse_mount_err; |
1da177e4 LT |
1262 | } |
1263 | if (strnlen(value, 65) < 65) { | |
b946845a SF |
1264 | if (strnicmp(value, "default", 7)) { |
1265 | vol->iocharset = kstrdup(value, | |
1266 | GFP_KERNEL); | |
1267 | ||
1268 | if (!vol->iocharset) { | |
1269 | printk(KERN_WARNING "CIFS: no " | |
1270 | "memory for" | |
1271 | "charset\n"); | |
1272 | goto cifs_parse_mount_err; | |
1273 | } | |
1274 | } | |
50c2f753 SF |
1275 | /* if iocharset not set then load_nls_default |
1276 | is used by caller */ | |
b6b38f70 | 1277 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1278 | } else { |
63135e08 SF |
1279 | printk(KERN_WARNING "CIFS: iocharset name " |
1280 | "too long.\n"); | |
b946845a | 1281 | goto cifs_parse_mount_err; |
1da177e4 | 1282 | } |
9b9d6b24 JL |
1283 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1284 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1285 | uid_specified = true; | |
bd763319 JL |
1286 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1287 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1288 | } else if (!strnicmp(data, "forceuid", 8)) { |
1289 | override_uid = 1; | |
1290 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1291 | override_uid = 0; | |
1292 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1293 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1294 | gid_specified = true; | |
1295 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1296 | override_gid = 1; | |
1297 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1298 | override_gid = 0; | |
1da177e4 LT |
1299 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1300 | if (value && *value) { | |
1301 | vol->file_mode = | |
1302 | simple_strtoul(value, &value, 0); | |
1303 | } | |
1304 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1305 | if (value && *value) { | |
1306 | vol->dir_mode = | |
1307 | simple_strtoul(value, &value, 0); | |
1308 | } | |
1309 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1310 | if (value && *value) { | |
1311 | vol->dir_mode = | |
1312 | simple_strtoul(value, &value, 0); | |
1313 | } | |
1314 | } else if (strnicmp(data, "port", 4) == 0) { | |
1315 | if (value && *value) { | |
1316 | vol->port = | |
1317 | simple_strtoul(value, &value, 0); | |
1318 | } | |
1319 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1320 | if (value && *value) { | |
1321 | vol->rsize = | |
1322 | simple_strtoul(value, &value, 0); | |
1323 | } | |
1324 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1325 | if (value && *value) { | |
1326 | vol->wsize = | |
1327 | simple_strtoul(value, &value, 0); | |
1328 | } | |
1329 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1330 | if (!value || !*value) { |
b6b38f70 | 1331 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1332 | continue; |
1333 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1334 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1335 | } |
1336 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1337 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1338 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1339 | } else { |
1397f2ee JL |
1340 | memset(vol->source_rfc1001_name, 0x20, |
1341 | RFC1001_NAME_LEN); | |
1342 | /* | |
1343 | * FIXME: are there cases in which a comma can | |
1344 | * be valid in workstation netbios name (and | |
1345 | * need special handling)? | |
1346 | */ | |
1347 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1348 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1349 | if (value[i] == 0) |
1da177e4 | 1350 | break; |
1397f2ee | 1351 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1352 | } |
1353 | /* The string has 16th byte zero still from | |
1354 | set at top of the function */ | |
1397f2ee | 1355 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1356 | printk(KERN_WARNING "CIFS: netbiosname" |
1357 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1358 | } |
1359 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1360 | /* servernetbiosname specified override *SMBSERVER */ | |
1361 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1362 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1363 | } else { |
1364 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1365 | memset(vol->target_rfc1001_name, 0x20, |
1366 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1367 | |
50c2f753 | 1368 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1369 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1370 | valid in this workstation netbios name |
1371 | (and need special handling)? */ | |
a10faeb2 | 1372 | |
50c2f753 SF |
1373 | /* user or mount helper must uppercase |
1374 | the netbiosname */ | |
1375 | if (value[i] == 0) | |
a10faeb2 SF |
1376 | break; |
1377 | else | |
50c2f753 SF |
1378 | vol->target_rfc1001_name[i] = |
1379 | value[i]; | |
a10faeb2 SF |
1380 | } |
1381 | /* The string has 16th byte zero still from | |
1382 | set at top of the function */ | |
1397f2ee | 1383 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1384 | printk(KERN_WARNING "CIFS: server net" |
1385 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1386 | } |
6d20e840 SJ |
1387 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1388 | if (value && *value) { | |
1389 | vol->actimeo = HZ * simple_strtoul(value, | |
1390 | &value, 0); | |
1391 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1392 | cERROR(1, "CIFS: attribute cache" | |
1393 | "timeout too large"); | |
b946845a | 1394 | goto cifs_parse_mount_err; |
6d20e840 SJ |
1395 | } |
1396 | } | |
1da177e4 LT |
1397 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1398 | /* ignore */ | |
1399 | } else if (strnicmp(data, "version", 3) == 0) { | |
1400 | /* ignore */ | |
50c2f753 | 1401 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1402 | /* ignore */ |
c9c7fa00 | 1403 | } else if (strnicmp(data, "rw", 2) == 0 && strlen(data) == 2) { |
71a394fa SF |
1404 | /* ignore */ |
1405 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1406 | /* ignore */ | |
edf1ae40 SF |
1407 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1408 | vol->noblocksnd = 1; | |
1409 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1410 | vol->noautotune = 1; | |
1da177e4 LT |
1411 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1412 | (strnicmp(data, "nosuid", 6) == 0) || | |
1413 | (strnicmp(data, "exec", 4) == 0) || | |
1414 | (strnicmp(data, "noexec", 6) == 0) || | |
1415 | (strnicmp(data, "nodev", 5) == 0) || | |
1416 | (strnicmp(data, "noauto", 6) == 0) || | |
1417 | (strnicmp(data, "dev", 3) == 0)) { | |
1418 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1419 | uses these opts to set flags, and the flags are read |
1420 | by the kernel vfs layer before we get here (ie | |
1421 | before read super) so there is no point trying to | |
1422 | parse these options again and set anything and it | |
1423 | is ok to just ignore them */ | |
1da177e4 | 1424 | continue; |
1da177e4 LT |
1425 | } else if (strnicmp(data, "hard", 4) == 0) { |
1426 | vol->retry = 1; | |
1427 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1428 | vol->retry = 0; | |
1429 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1430 | vol->noperm = 0; | |
1431 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1432 | vol->noperm = 1; | |
6a0b4824 SF |
1433 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1434 | vol->remap = 1; | |
1435 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1436 | vol->remap = 0; | |
50c2f753 SF |
1437 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1438 | vol->sfu_emul = 1; | |
1439 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1440 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1441 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1442 | vol->nodfs = 1; | |
ac67055e JA |
1443 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1444 | vol->posix_paths = 1; | |
1445 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1446 | vol->posix_paths = 0; | |
c18c842b SF |
1447 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1448 | vol->no_linux_ext = 1; | |
1449 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1450 | vol->no_linux_ext = 1; | |
50c2f753 | 1451 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1452 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1453 | vol->nocase = 1; |
f636a348 JL |
1454 | } else if (strnicmp(data, "mand", 4) == 0) { |
1455 | /* ignore */ | |
1456 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1457 | /* ignore */ | |
1458 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1459 | /* ignore */ | |
c46fa8ac SF |
1460 | } else if (strnicmp(data, "brl", 3) == 0) { |
1461 | vol->nobrl = 0; | |
50c2f753 | 1462 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1463 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1464 | vol->nobrl = 1; |
d3485d37 SF |
1465 | /* turn off mandatory locking in mode |
1466 | if remote locking is turned off since the | |
1467 | local vfs will do advisory */ | |
50c2f753 SF |
1468 | if (vol->file_mode == |
1469 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1470 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1471 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1472 | /* will take the shorter form "forcemand" as well */ | |
1473 | /* This mount option will force use of mandatory | |
1474 | (DOS/Windows style) byte range locks, instead of | |
1475 | using posix advisory byte range locks, even if the | |
1476 | Unix extensions are available and posix locks would | |
1477 | be supported otherwise. If Unix extensions are not | |
1478 | negotiated this has no effect since mandatory locks | |
1479 | would be used (mandatory locks is all that those | |
1480 | those servers support) */ | |
1481 | vol->mand_lock = 1; | |
1da177e4 LT |
1482 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1483 | vol->setuids = 1; | |
1484 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1485 | vol->setuids = 0; | |
d0a9c078 JL |
1486 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1487 | vol->dynperm = true; | |
1488 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1489 | vol->dynperm = false; | |
1da177e4 LT |
1490 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1491 | vol->retry = 0; | |
1492 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1493 | vol->retry = 1; | |
1494 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1495 | vol->intr = 0; | |
1496 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1497 | vol->intr = 1; | |
be652445 SF |
1498 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1499 | vol->nostrictsync = 1; | |
1500 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1501 | vol->nostrictsync = 0; | |
50c2f753 | 1502 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1503 | vol->server_ino = 1; |
50c2f753 | 1504 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1505 | vol->server_ino = 0; |
c9c7fa00 | 1506 | } else if (strnicmp(data, "rwpidforward", 12) == 0) { |
d4ffff1f | 1507 | vol->rwpidforward = 1; |
50c2f753 | 1508 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1509 | vol->cifs_acl = 1; |
1510 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1511 | vol->cifs_acl = 0; | |
50c2f753 | 1512 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1513 | vol->no_psx_acl = 0; |
50c2f753 | 1514 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1515 | vol->no_psx_acl = 1; |
84210e91 SF |
1516 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1517 | vol->local_lease = 1; | |
50c2f753 | 1518 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1519 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1520 | } else if (strnicmp(data, "seal", 4) == 0) { |
1521 | /* we do not do the following in secFlags because seal | |
1522 | is a per tree connection (mount) not a per socket | |
1523 | or per-smb connection option in the protocol */ | |
1524 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1525 | vol->seal = 1; | |
50c2f753 | 1526 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1527 | vol->direct_io = 1; |
50c2f753 | 1528 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1529 | vol->direct_io = 1; |
d39454ff PS |
1530 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1531 | vol->strict_io = 1; | |
1da177e4 | 1532 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1533 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1534 | "supported. Instead set " | |
1535 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1536 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d | 1537 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1538 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1539 | "kernel config option set"); |
b946845a | 1540 | goto cifs_parse_mount_err; |
607a569d | 1541 | #endif |
fa1df75d | 1542 | vol->fsc = true; |
736a3320 SM |
1543 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1544 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1545 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1546 | vol->multiuser = true; | |
3d3ea8e6 SP |
1547 | } else if (!strnicmp(data, "backupuid", 9) && value && *value) { |
1548 | err = kstrtouint(value, 0, &vol->backupuid); | |
1549 | if (err < 0) { | |
1550 | cERROR(1, "%s: Invalid backupuid value", | |
1551 | __func__); | |
1552 | goto cifs_parse_mount_err; | |
1553 | } | |
1554 | vol->backupuid_specified = true; | |
1555 | } else if (!strnicmp(data, "backupgid", 9) && value && *value) { | |
1556 | err = kstrtouint(value, 0, &vol->backupgid); | |
1557 | if (err < 0) { | |
1558 | cERROR(1, "%s: Invalid backupgid value", | |
1559 | __func__); | |
1560 | goto cifs_parse_mount_err; | |
1561 | } | |
1562 | vol->backupgid_specified = true; | |
1da177e4 | 1563 | } else |
50c2f753 SF |
1564 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1565 | data); | |
1da177e4 LT |
1566 | } |
1567 | if (vol->UNC == NULL) { | |
4523cc30 | 1568 | if (devname == NULL) { |
50c2f753 SF |
1569 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1570 | "target\n"); | |
b946845a | 1571 | goto cifs_parse_mount_err; |
1da177e4 LT |
1572 | } |
1573 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1574 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1575 | if (vol->UNC == NULL) |
b946845a | 1576 | goto cifs_parse_mount_err; |
50c2f753 | 1577 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1578 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1579 | vol->UNC[0] = '\\'; | |
1580 | vol->UNC[1] = '\\'; | |
1581 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1582 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1583 | "begin with // or \\\\ \n"); | |
b946845a | 1584 | goto cifs_parse_mount_err; |
1da177e4 | 1585 | } |
7c5e628f IM |
1586 | value = strpbrk(vol->UNC+2, "/\\"); |
1587 | if (value) | |
1588 | *value = '\\'; | |
1da177e4 LT |
1589 | } else { |
1590 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1591 | goto cifs_parse_mount_err; |
1da177e4 LT |
1592 | } |
1593 | } | |
0eb8a132 | 1594 | |
8a8798a5 JL |
1595 | #ifndef CONFIG_KEYS |
1596 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1597 | if (vol->multiuser) { | |
1598 | cERROR(1, "Multiuser mounts require kernels with " | |
1599 | "CONFIG_KEYS enabled."); | |
b946845a | 1600 | goto cifs_parse_mount_err; |
0eb8a132 | 1601 | } |
8a8798a5 | 1602 | #endif |
0eb8a132 | 1603 | |
fb8c4b14 | 1604 | if (vol->UNCip == NULL) |
1da177e4 LT |
1605 | vol->UNCip = &vol->UNC[2]; |
1606 | ||
9b9d6b24 JL |
1607 | if (uid_specified) |
1608 | vol->override_uid = override_uid; | |
1609 | else if (override_uid == 1) | |
1610 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1611 | "specified with no uid= option.\n"); | |
1612 | ||
1613 | if (gid_specified) | |
1614 | vol->override_gid = override_gid; | |
1615 | else if (override_gid == 1) | |
1616 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1617 | "specified with no gid= option.\n"); | |
1618 | ||
b946845a | 1619 | kfree(mountdata_copy); |
1da177e4 | 1620 | return 0; |
b946845a SF |
1621 | |
1622 | cifs_parse_mount_err: | |
1623 | kfree(mountdata_copy); | |
1624 | return 1; | |
1da177e4 LT |
1625 | } |
1626 | ||
3eb9a889 BG |
1627 | /** Returns true if srcaddr isn't specified and rhs isn't |
1628 | * specified, or if srcaddr is specified and | |
1629 | * matches the IP address of the rhs argument. | |
1630 | */ | |
1631 | static bool | |
1632 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1633 | { | |
1634 | switch (srcaddr->sa_family) { | |
1635 | case AF_UNSPEC: | |
1636 | return (rhs->sa_family == AF_UNSPEC); | |
1637 | case AF_INET: { | |
1638 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1639 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1640 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1641 | } | |
1642 | case AF_INET6: { | |
1643 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1644 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1645 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1646 | } | |
1647 | default: | |
1648 | WARN_ON(1); | |
1649 | return false; /* don't expect to be here */ | |
1650 | } | |
1651 | } | |
1652 | ||
4b886136 PS |
1653 | /* |
1654 | * If no port is specified in addr structure, we try to match with 445 port | |
1655 | * and if it fails - with 139 ports. It should be called only if address | |
1656 | * families of server and addr are equal. | |
1657 | */ | |
1658 | static bool | |
1659 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1660 | { | |
6da97910 | 1661 | __be16 port, *sport; |
4b886136 PS |
1662 | |
1663 | switch (addr->sa_family) { | |
1664 | case AF_INET: | |
1665 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1666 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1667 | break; | |
1668 | case AF_INET6: | |
1669 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1670 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1671 | break; | |
1672 | default: | |
1673 | WARN_ON(1); | |
1674 | return false; | |
1675 | } | |
1676 | ||
1677 | if (!port) { | |
1678 | port = htons(CIFS_PORT); | |
1679 | if (port == *sport) | |
1680 | return true; | |
1681 | ||
1682 | port = htons(RFC1001_PORT); | |
1683 | } | |
1684 | ||
1685 | return port == *sport; | |
1686 | } | |
3eb9a889 | 1687 | |
4515148e | 1688 | static bool |
3eb9a889 BG |
1689 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1690 | struct sockaddr *srcaddr) | |
4515148e | 1691 | { |
4515148e | 1692 | switch (addr->sa_family) { |
a9f1b85e PS |
1693 | case AF_INET: { |
1694 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1695 | struct sockaddr_in *srv_addr4 = | |
1696 | (struct sockaddr_in *)&server->dstaddr; | |
1697 | ||
1698 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1699 | return false; |
4515148e | 1700 | break; |
a9f1b85e PS |
1701 | } |
1702 | case AF_INET6: { | |
1703 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1704 | struct sockaddr_in6 *srv_addr6 = | |
1705 | (struct sockaddr_in6 *)&server->dstaddr; | |
1706 | ||
4515148e | 1707 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1708 | &srv_addr6->sin6_addr)) |
4515148e | 1709 | return false; |
a9f1b85e | 1710 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1711 | return false; |
4515148e JL |
1712 | break; |
1713 | } | |
a9f1b85e PS |
1714 | default: |
1715 | WARN_ON(1); | |
1716 | return false; /* don't expect to be here */ | |
1717 | } | |
4515148e | 1718 | |
3eb9a889 BG |
1719 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1720 | return false; | |
1721 | ||
4515148e JL |
1722 | return true; |
1723 | } | |
1724 | ||
daf5b0b6 JL |
1725 | static bool |
1726 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1727 | { | |
1728 | unsigned int secFlags; | |
1729 | ||
1730 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1731 | secFlags = vol->secFlg; | |
1732 | else | |
1733 | secFlags = global_secflags | vol->secFlg; | |
1734 | ||
1735 | switch (server->secType) { | |
1736 | case LANMAN: | |
1737 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1738 | return false; | |
1739 | break; | |
1740 | case NTLMv2: | |
1741 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1742 | return false; | |
1743 | break; | |
1744 | case NTLM: | |
1745 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1746 | return false; | |
1747 | break; | |
1748 | case Kerberos: | |
1749 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1750 | return false; | |
1751 | break; | |
1752 | case RawNTLMSSP: | |
1753 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1754 | return false; | |
1755 | break; | |
1756 | default: | |
1757 | /* shouldn't happen */ | |
1758 | return false; | |
1759 | } | |
1760 | ||
25985edc | 1761 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 1762 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 1763 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
1764 | return false; |
1765 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 1766 | (server->sec_mode & |
daf5b0b6 JL |
1767 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
1768 | return false; | |
1769 | ||
1770 | return true; | |
1771 | } | |
1772 | ||
37bb04e5 PS |
1773 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1774 | struct smb_vol *vol) | |
1775 | { | |
1776 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
1777 | return 0; | |
1778 | ||
1779 | if (!match_address(server, addr, | |
1780 | (struct sockaddr *)&vol->srcaddr)) | |
1781 | return 0; | |
1782 | ||
1783 | if (!match_port(server, addr)) | |
1784 | return 0; | |
1785 | ||
1786 | if (!match_security(server, vol)) | |
1787 | return 0; | |
1788 | ||
1789 | return 1; | |
1790 | } | |
1791 | ||
e7ddee90 | 1792 | static struct TCP_Server_Info * |
daf5b0b6 | 1793 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1794 | { |
e7ddee90 | 1795 | struct TCP_Server_Info *server; |
e7ddee90 | 1796 | |
3f9bcca7 | 1797 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1798 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 1799 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
1800 | continue; |
1801 | ||
e7ddee90 | 1802 | ++server->srv_count; |
3f9bcca7 | 1803 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1804 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1805 | return server; |
1da177e4 | 1806 | } |
3f9bcca7 | 1807 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1808 | return NULL; |
1809 | } | |
1b20d672 | 1810 | |
14fbf50d | 1811 | static void |
e7ddee90 | 1812 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1813 | { |
e7ddee90 | 1814 | struct task_struct *task; |
1b20d672 | 1815 | |
3f9bcca7 | 1816 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1817 | if (--server->srv_count > 0) { |
3f9bcca7 | 1818 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1819 | return; |
1da177e4 | 1820 | } |
1b20d672 | 1821 | |
f1d0c998 RL |
1822 | put_net(cifs_net_ns(server)); |
1823 | ||
e7ddee90 | 1824 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1825 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1826 | |
c74093b6 JL |
1827 | cancel_delayed_work_sync(&server->echo); |
1828 | ||
e7ddee90 JL |
1829 | spin_lock(&GlobalMid_Lock); |
1830 | server->tcpStatus = CifsExiting; | |
1831 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1832 | |
d2b91521 | 1833 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1834 | cifs_fscache_release_client_cookie(server); |
1835 | ||
21e73393 SP |
1836 | kfree(server->session_key.response); |
1837 | server->session_key.response = NULL; | |
1838 | server->session_key.len = 0; | |
1839 | ||
e7ddee90 JL |
1840 | task = xchg(&server->tsk, NULL); |
1841 | if (task) | |
1842 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1843 | } |
1844 | ||
63c038c2 JL |
1845 | static struct TCP_Server_Info * |
1846 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1847 | { | |
1848 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1849 | struct sockaddr_storage addr; |
63c038c2 JL |
1850 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1851 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1852 | int rc; | |
1853 | ||
a9ac49d3 | 1854 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1855 | |
b6b38f70 | 1856 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1857 | |
1e68b2b2 | 1858 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1859 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1860 | volume_info->UNCip, | |
67b7626a | 1861 | strlen(volume_info->UNCip), |
50d97160 | 1862 | volume_info->port); |
1e68b2b2 | 1863 | if (!rc) { |
63c038c2 JL |
1864 | /* we failed translating address */ |
1865 | rc = -EINVAL; | |
1866 | goto out_err; | |
1867 | } | |
63c038c2 JL |
1868 | } else if (volume_info->UNCip) { |
1869 | /* BB using ip addr as tcp_ses name to connect to the | |
1870 | DFS root below */ | |
b6b38f70 | 1871 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1872 | rc = -EINVAL; |
1873 | goto out_err; | |
1874 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1875 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1876 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1877 | rc = -EINVAL; |
1878 | goto out_err; | |
1879 | } | |
1880 | ||
1881 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1882 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1883 | if (tcp_ses) |
1884 | return tcp_ses; | |
1885 | ||
1886 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1887 | if (!tcp_ses) { | |
1888 | rc = -ENOMEM; | |
1889 | goto out_err; | |
1890 | } | |
1891 | ||
d2b91521 SP |
1892 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1893 | if (rc) { | |
1894 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1895 | goto out_err; | |
1896 | } | |
1897 | ||
f1d0c998 | 1898 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1899 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1900 | if (IS_ERR(tcp_ses->hostname)) { | |
1901 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1902 | goto out_err_crypto_release; |
63c038c2 JL |
1903 | } |
1904 | ||
1905 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1906 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1907 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 1908 | tcp_ses->in_flight = 0; |
2d86dbc9 | 1909 | tcp_ses->credits = 1; |
63c038c2 JL |
1910 | init_waitqueue_head(&tcp_ses->response_q); |
1911 | init_waitqueue_head(&tcp_ses->request_q); | |
1912 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1913 | mutex_init(&tcp_ses->srv_mutex); | |
1914 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1915 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1916 | memcpy(tcp_ses->server_RFC1001_name, | |
1917 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1918 | tcp_ses->session_estab = false; |
63c038c2 | 1919 | tcp_ses->sequence_number = 0; |
fda35943 | 1920 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1921 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1922 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1923 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1924 | |
1925 | /* | |
1926 | * at this point we are the only ones with the pointer | |
1927 | * to the struct since the kernel thread not created yet | |
1928 | * no need to spinlock this init of tcpStatus or srv_count | |
1929 | */ | |
1930 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1931 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1932 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1933 | ++tcp_ses->srv_count; |
1934 | ||
a9ac49d3 | 1935 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1936 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1937 | /* BB should we allow ipv6 on port 139? */ |
1938 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1939 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1940 | sizeof(struct sockaddr_in6)); | |
1941 | } else | |
1942 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1943 | sizeof(struct sockaddr_in)); | |
1944 | ||
1945 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1946 | if (rc < 0) { |
b6b38f70 | 1947 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1948 | goto out_err_crypto_release; |
63c038c2 JL |
1949 | } |
1950 | ||
1951 | /* | |
1952 | * since we're in a cifs function already, we know that | |
1953 | * this will succeed. No need for try_module_get(). | |
1954 | */ | |
1955 | __module_get(THIS_MODULE); | |
7c97c200 | 1956 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
1957 | tcp_ses, "cifsd"); |
1958 | if (IS_ERR(tcp_ses->tsk)) { | |
1959 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1960 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1961 | module_put(THIS_MODULE); |
f7c5445a | 1962 | goto out_err_crypto_release; |
63c038c2 | 1963 | } |
fd88ce93 | 1964 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1965 | |
1966 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1967 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1968 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1969 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1970 | |
488f1d2d SJ |
1971 | cifs_fscache_get_client_cookie(tcp_ses); |
1972 | ||
c74093b6 | 1973 | /* queue echo request delayed work */ |
da472fc8 | 1974 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 1975 | |
63c038c2 JL |
1976 | return tcp_ses; |
1977 | ||
f7c5445a | 1978 | out_err_crypto_release: |
d2b91521 SP |
1979 | cifs_crypto_shash_release(tcp_ses); |
1980 | ||
f1d0c998 RL |
1981 | put_net(cifs_net_ns(tcp_ses)); |
1982 | ||
63c038c2 JL |
1983 | out_err: |
1984 | if (tcp_ses) { | |
8347a5cd SF |
1985 | if (!IS_ERR(tcp_ses->hostname)) |
1986 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1987 | if (tcp_ses->ssocket) |
1988 | sock_release(tcp_ses->ssocket); | |
1989 | kfree(tcp_ses); | |
1990 | } | |
1991 | return ERR_PTR(rc); | |
1992 | } | |
1993 | ||
96daf2b0 | 1994 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
1995 | { |
1996 | switch (ses->server->secType) { | |
1997 | case Kerberos: | |
1998 | if (vol->cred_uid != ses->cred_uid) | |
1999 | return 0; | |
2000 | break; | |
2001 | default: | |
04febabc JL |
2002 | /* NULL username means anonymous session */ |
2003 | if (ses->user_name == NULL) { | |
2004 | if (!vol->nullauth) | |
2005 | return 0; | |
2006 | break; | |
2007 | } | |
2008 | ||
37bb04e5 | 2009 | /* anything else takes username/password */ |
04febabc JL |
2010 | if (strncmp(ses->user_name, |
2011 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2012 | MAX_USERNAME_SIZE)) |
2013 | return 0; | |
2014 | if (strlen(vol->username) != 0 && | |
2015 | ses->password != NULL && | |
2016 | strncmp(ses->password, | |
2017 | vol->password ? vol->password : "", | |
2018 | MAX_PASSWORD_SIZE)) | |
2019 | return 0; | |
2020 | } | |
2021 | return 1; | |
2022 | } | |
2023 | ||
96daf2b0 | 2024 | static struct cifs_ses * |
4ff67b72 | 2025 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2026 | { |
96daf2b0 | 2027 | struct cifs_ses *ses; |
dea570e0 | 2028 | |
3f9bcca7 | 2029 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2030 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2031 | if (!match_session(ses, vol)) |
2032 | continue; | |
14fbf50d | 2033 | ++ses->ses_count; |
3f9bcca7 | 2034 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2035 | return ses; |
2036 | } | |
3f9bcca7 | 2037 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2038 | return NULL; |
2039 | } | |
dea570e0 | 2040 | |
14fbf50d | 2041 | static void |
96daf2b0 | 2042 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d JL |
2043 | { |
2044 | int xid; | |
2045 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 2046 | |
36988c76 | 2047 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 2048 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2049 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2050 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2051 | return; |
2052 | } | |
dea570e0 | 2053 | |
14fbf50d | 2054 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2055 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2056 | |
14fbf50d JL |
2057 | if (ses->status == CifsGood) { |
2058 | xid = GetXid(); | |
2059 | CIFSSMBLogoff(xid, ses); | |
2060 | _FreeXid(xid); | |
2061 | } | |
2062 | sesInfoFree(ses); | |
2063 | cifs_put_tcp_session(server); | |
2064 | } | |
dea570e0 | 2065 | |
8a8798a5 JL |
2066 | #ifdef CONFIG_KEYS |
2067 | ||
2068 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2069 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2070 | ||
2071 | /* Populate username and pw fields from keyring if possible */ | |
2072 | static int | |
2073 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2074 | { | |
2075 | int rc = 0; | |
2076 | char *desc, *delim, *payload; | |
2077 | ssize_t len; | |
2078 | struct key *key; | |
2079 | struct TCP_Server_Info *server = ses->server; | |
2080 | struct sockaddr_in *sa; | |
2081 | struct sockaddr_in6 *sa6; | |
2082 | struct user_key_payload *upayload; | |
2083 | ||
2084 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2085 | if (!desc) | |
2086 | return -ENOMEM; | |
2087 | ||
2088 | /* try to find an address key first */ | |
2089 | switch (server->dstaddr.ss_family) { | |
2090 | case AF_INET: | |
2091 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2092 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2093 | break; | |
2094 | case AF_INET6: | |
2095 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2096 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2097 | break; | |
2098 | default: | |
2099 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2100 | rc = -EINVAL; | |
2101 | goto out_err; | |
2102 | } | |
2103 | ||
2104 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2105 | key = request_key(&key_type_logon, desc, ""); | |
2106 | if (IS_ERR(key)) { | |
2107 | if (!ses->domainName) { | |
2108 | cFYI(1, "domainName is NULL"); | |
2109 | rc = PTR_ERR(key); | |
2110 | goto out_err; | |
2111 | } | |
2112 | ||
2113 | /* didn't work, try to find a domain key */ | |
2114 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2115 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2116 | key = request_key(&key_type_logon, desc, ""); | |
2117 | if (IS_ERR(key)) { | |
2118 | rc = PTR_ERR(key); | |
2119 | goto out_err; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | down_read(&key->sem); | |
2124 | upayload = key->payload.data; | |
2125 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2126 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2127 | goto out_key_put; |
2128 | } | |
2129 | ||
2130 | /* find first : in payload */ | |
2131 | payload = (char *)upayload->data; | |
2132 | delim = strnchr(payload, upayload->datalen, ':'); | |
2133 | cFYI(1, "payload=%s", payload); | |
2134 | if (!delim) { | |
2135 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2136 | upayload->datalen); | |
2137 | rc = -EINVAL; | |
2138 | goto out_key_put; | |
2139 | } | |
2140 | ||
2141 | len = delim - payload; | |
2142 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2143 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2144 | rc = -EINVAL; |
2145 | goto out_key_put; | |
2146 | } | |
2147 | ||
2148 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2149 | if (!vol->username) { | |
000f9bb8 | 2150 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2151 | rc = -ENOMEM; |
2152 | goto out_key_put; | |
2153 | } | |
2154 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2155 | ||
2156 | len = key->datalen - (len + 1); | |
2157 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2158 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2159 | rc = -EINVAL; |
2160 | kfree(vol->username); | |
2161 | vol->username = NULL; | |
2162 | goto out_key_put; | |
2163 | } | |
2164 | ||
2165 | ++delim; | |
2166 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2167 | if (!vol->password) { | |
000f9bb8 | 2168 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2169 | rc = -ENOMEM; |
2170 | kfree(vol->username); | |
2171 | vol->username = NULL; | |
2172 | goto out_key_put; | |
2173 | } | |
2174 | ||
2175 | out_key_put: | |
2176 | up_read(&key->sem); | |
2177 | key_put(key); | |
2178 | out_err: | |
2179 | kfree(desc); | |
2180 | cFYI(1, "%s: returning %d", __func__, rc); | |
2181 | return rc; | |
2182 | } | |
2183 | #else /* ! CONFIG_KEYS */ | |
2184 | static inline int | |
2185 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2186 | struct cifs_ses *ses __attribute__((unused))) | |
2187 | { | |
2188 | return -ENOSYS; | |
2189 | } | |
2190 | #endif /* CONFIG_KEYS */ | |
2191 | ||
d9b94201 SF |
2192 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2193 | ||
96daf2b0 | 2194 | static struct cifs_ses * |
36988c76 JL |
2195 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2196 | { | |
2197 | int rc = -ENOMEM, xid; | |
96daf2b0 | 2198 | struct cifs_ses *ses; |
a9f1b85e PS |
2199 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2200 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
2201 | |
2202 | xid = GetXid(); | |
2203 | ||
4ff67b72 | 2204 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2205 | if (ses) { |
2206 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2207 | ||
36988c76 | 2208 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2209 | rc = cifs_negotiate_protocol(xid, ses); |
2210 | if (rc) { | |
2211 | mutex_unlock(&ses->session_mutex); | |
2212 | /* problem -- put our ses reference */ | |
2213 | cifs_put_smb_ses(ses); | |
2214 | FreeXid(xid); | |
2215 | return ERR_PTR(rc); | |
2216 | } | |
36988c76 JL |
2217 | if (ses->need_reconnect) { |
2218 | cFYI(1, "Session needs reconnect"); | |
2219 | rc = cifs_setup_session(xid, ses, | |
2220 | volume_info->local_nls); | |
2221 | if (rc) { | |
2222 | mutex_unlock(&ses->session_mutex); | |
2223 | /* problem -- put our reference */ | |
2224 | cifs_put_smb_ses(ses); | |
2225 | FreeXid(xid); | |
2226 | return ERR_PTR(rc); | |
2227 | } | |
2228 | } | |
2229 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2230 | |
2231 | /* existing SMB ses has a server reference already */ | |
2232 | cifs_put_tcp_session(server); | |
36988c76 JL |
2233 | FreeXid(xid); |
2234 | return ses; | |
2235 | } | |
2236 | ||
2237 | cFYI(1, "Existing smb sess not found"); | |
2238 | ses = sesInfoAlloc(); | |
2239 | if (ses == NULL) | |
2240 | goto get_ses_fail; | |
2241 | ||
2242 | /* new SMB session uses our server ref */ | |
2243 | ses->server = server; | |
a9f1b85e PS |
2244 | if (server->dstaddr.ss_family == AF_INET6) |
2245 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2246 | else |
a9f1b85e | 2247 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2248 | |
8727c8a8 SF |
2249 | if (volume_info->username) { |
2250 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2251 | if (!ses->user_name) | |
2252 | goto get_ses_fail; | |
2253 | } | |
36988c76 JL |
2254 | |
2255 | /* volume_info->password freed at unmount */ | |
2256 | if (volume_info->password) { | |
2257 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2258 | if (!ses->password) | |
2259 | goto get_ses_fail; | |
2260 | } | |
2261 | if (volume_info->domainname) { | |
d3686d54 SP |
2262 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2263 | if (!ses->domainName) | |
2264 | goto get_ses_fail; | |
36988c76 | 2265 | } |
3e4b3e1f | 2266 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2267 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2268 | |
2269 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2270 | supported for many years, time to update default security mechanism */ | |
2271 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2272 | warned_on_ntlm = true; | |
2273 | cERROR(1, "default security mechanism requested. The default " | |
2274 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2275 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2276 | } |
36988c76 JL |
2277 | ses->overrideSecFlg = volume_info->secFlg; |
2278 | ||
2279 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2280 | rc = cifs_negotiate_protocol(xid, ses); |
2281 | if (!rc) | |
2282 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2283 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2284 | if (rc) |
36988c76 JL |
2285 | goto get_ses_fail; |
2286 | ||
2287 | /* success, put it on the list */ | |
3f9bcca7 | 2288 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2289 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2290 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2291 | |
2292 | FreeXid(xid); | |
2293 | return ses; | |
2294 | ||
2295 | get_ses_fail: | |
2296 | sesInfoFree(ses); | |
2297 | FreeXid(xid); | |
2298 | return ERR_PTR(rc); | |
2299 | } | |
2300 | ||
96daf2b0 | 2301 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2302 | { |
2303 | if (tcon->tidStatus == CifsExiting) | |
2304 | return 0; | |
2305 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2306 | return 0; | |
2307 | return 1; | |
2308 | } | |
2309 | ||
96daf2b0 SF |
2310 | static struct cifs_tcon * |
2311 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2312 | { |
2313 | struct list_head *tmp; | |
96daf2b0 | 2314 | struct cifs_tcon *tcon; |
f1987b44 | 2315 | |
3f9bcca7 | 2316 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2317 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2318 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2319 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2320 | continue; |
f1987b44 | 2321 | ++tcon->tc_count; |
3f9bcca7 | 2322 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2323 | return tcon; |
1da177e4 | 2324 | } |
3f9bcca7 | 2325 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2326 | return NULL; |
2327 | } | |
2328 | ||
f1987b44 | 2329 | static void |
96daf2b0 | 2330 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 JL |
2331 | { |
2332 | int xid; | |
96daf2b0 | 2333 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2334 | |
d00c28de | 2335 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2336 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2337 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2338 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2339 | return; |
2340 | } | |
2341 | ||
2342 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2343 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2344 | |
2345 | xid = GetXid(); | |
2346 | CIFSSMBTDis(xid, tcon); | |
2347 | _FreeXid(xid); | |
2348 | ||
d03382ce | 2349 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2350 | tconInfoFree(tcon); |
f1987b44 JL |
2351 | cifs_put_smb_ses(ses); |
2352 | } | |
2353 | ||
96daf2b0 SF |
2354 | static struct cifs_tcon * |
2355 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2356 | { |
2357 | int rc, xid; | |
96daf2b0 | 2358 | struct cifs_tcon *tcon; |
d00c28de JL |
2359 | |
2360 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2361 | if (tcon) { | |
2362 | cFYI(1, "Found match on UNC path"); | |
2363 | /* existing tcon already has a reference */ | |
2364 | cifs_put_smb_ses(ses); | |
2365 | if (tcon->seal != volume_info->seal) | |
2366 | cERROR(1, "transport encryption setting " | |
2367 | "conflicts with existing tid"); | |
2368 | return tcon; | |
2369 | } | |
2370 | ||
2371 | tcon = tconInfoAlloc(); | |
2372 | if (tcon == NULL) { | |
2373 | rc = -ENOMEM; | |
2374 | goto out_fail; | |
2375 | } | |
2376 | ||
2377 | tcon->ses = ses; | |
2378 | if (volume_info->password) { | |
2379 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2380 | if (!tcon->password) { | |
2381 | rc = -ENOMEM; | |
2382 | goto out_fail; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2387 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2388 | cERROR(1, "Missing share name"); | |
2389 | rc = -ENODEV; | |
2390 | goto out_fail; | |
2391 | } | |
2392 | ||
2393 | /* BB Do we need to wrap session_mutex around | |
2394 | * this TCon call and Unix SetFS as | |
2395 | * we do on SessSetup and reconnect? */ | |
2396 | xid = GetXid(); | |
2397 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2398 | FreeXid(xid); | |
2399 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2400 | if (rc) | |
2401 | goto out_fail; | |
2402 | ||
2403 | if (volume_info->nodfs) { | |
2404 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2405 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2406 | } | |
2407 | tcon->seal = volume_info->seal; | |
2408 | /* we can have only one retry value for a connection | |
2409 | to a share so for resources mounted more than once | |
2410 | to the same server share the last value passed in | |
2411 | for the retry flag is used */ | |
2412 | tcon->retry = volume_info->retry; | |
2413 | tcon->nocase = volume_info->nocase; | |
2414 | tcon->local_lease = volume_info->local_lease; | |
2415 | ||
3f9bcca7 | 2416 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2417 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2418 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2419 | |
d03382ce SJ |
2420 | cifs_fscache_get_super_cookie(tcon); |
2421 | ||
d00c28de JL |
2422 | return tcon; |
2423 | ||
2424 | out_fail: | |
2425 | tconInfoFree(tcon); | |
2426 | return ERR_PTR(rc); | |
2427 | } | |
2428 | ||
9d002df4 JL |
2429 | void |
2430 | cifs_put_tlink(struct tcon_link *tlink) | |
2431 | { | |
2432 | if (!tlink || IS_ERR(tlink)) | |
2433 | return; | |
2434 | ||
2435 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2436 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2437 | tlink->tl_time = jiffies; | |
2438 | return; | |
2439 | } | |
2440 | ||
2441 | if (!IS_ERR(tlink_tcon(tlink))) | |
2442 | cifs_put_tcon(tlink_tcon(tlink)); | |
2443 | kfree(tlink); | |
2444 | return; | |
2445 | } | |
d00c28de | 2446 | |
25c7f41e | 2447 | static inline struct tcon_link * |
cd51875d PS |
2448 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2449 | { | |
2450 | return cifs_sb->master_tlink; | |
2451 | } | |
25c7f41e PS |
2452 | |
2453 | static int | |
2454 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2455 | { | |
2456 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2457 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2458 | ||
2459 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2460 | return 0; | |
2461 | ||
2462 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2463 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2464 | return 0; | |
2465 | ||
25c7f41e | 2466 | /* |
5eba8ab3 JL |
2467 | * We want to share sb only if we don't specify an r/wsize or |
2468 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2469 | */ |
2470 | if (new->wsize && new->wsize < old->wsize) | |
2471 | return 0; | |
2472 | ||
5eba8ab3 JL |
2473 | if (new->rsize && new->rsize < old->rsize) |
2474 | return 0; | |
2475 | ||
25c7f41e PS |
2476 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2477 | return 0; | |
2478 | ||
2479 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2480 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2481 | return 0; | |
2482 | ||
2483 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2484 | return 0; | |
2485 | ||
2486 | if (old->actimeo != new->actimeo) | |
2487 | return 0; | |
2488 | ||
2489 | return 1; | |
2490 | } | |
2491 | ||
2492 | int | |
2493 | cifs_match_super(struct super_block *sb, void *data) | |
2494 | { | |
2495 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2496 | struct smb_vol *volume_info; | |
2497 | struct cifs_sb_info *cifs_sb; | |
2498 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2499 | struct cifs_ses *ses; |
2500 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2501 | struct tcon_link *tlink; |
2502 | struct sockaddr_storage addr; | |
2503 | int rc = 0; | |
2504 | ||
2505 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2506 | ||
2507 | spin_lock(&cifs_tcp_ses_lock); | |
2508 | cifs_sb = CIFS_SB(sb); | |
2509 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2510 | if (IS_ERR(tlink)) { | |
2511 | spin_unlock(&cifs_tcp_ses_lock); | |
2512 | return rc; | |
2513 | } | |
2514 | tcon = tlink_tcon(tlink); | |
2515 | ses = tcon->ses; | |
2516 | tcp_srv = ses->server; | |
2517 | ||
2518 | volume_info = mnt_data->vol; | |
2519 | ||
2520 | if (!volume_info->UNCip || !volume_info->UNC) | |
2521 | goto out; | |
2522 | ||
2523 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2524 | volume_info->UNCip, | |
2525 | strlen(volume_info->UNCip), | |
2526 | volume_info->port); | |
2527 | if (!rc) | |
2528 | goto out; | |
2529 | ||
2530 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2531 | !match_session(ses, volume_info) || | |
2532 | !match_tcon(tcon, volume_info->UNC)) { | |
2533 | rc = 0; | |
2534 | goto out; | |
2535 | } | |
2536 | ||
2537 | rc = compare_mount_options(sb, mnt_data); | |
2538 | out: | |
25c7f41e | 2539 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2540 | cifs_put_tlink(tlink); |
25c7f41e PS |
2541 | return rc; |
2542 | } | |
2543 | ||
1da177e4 | 2544 | int |
96daf2b0 | 2545 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
50c2f753 | 2546 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
366781c1 | 2547 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2548 | { |
2549 | char *temp_unc; | |
2550 | int rc = 0; | |
2551 | ||
2552 | *pnum_referrals = 0; | |
366781c1 | 2553 | *preferrals = NULL; |
1da177e4 LT |
2554 | |
2555 | if (pSesInfo->ipc_tid == 0) { | |
2556 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2557 | strnlen(pSesInfo->serverName, |
2558 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2559 | + 1 + 4 /* slash IPC$ */ + 2, |
2560 | GFP_KERNEL); | |
2561 | if (temp_unc == NULL) | |
2562 | return -ENOMEM; | |
2563 | temp_unc[0] = '\\'; | |
2564 | temp_unc[1] = '\\'; | |
2565 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2566 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2567 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2568 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2569 | kfree(temp_unc); |
2570 | } | |
2571 | if (rc == 0) | |
c2cf07d5 | 2572 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2573 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2574 | /* BB map targetUNCs to dfs_info3 structures, here or |
2575 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2576 | |
2577 | return rc; | |
2578 | } | |
2579 | ||
09e50d55 JL |
2580 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2581 | static struct lock_class_key cifs_key[2]; | |
2582 | static struct lock_class_key cifs_slock_key[2]; | |
2583 | ||
2584 | static inline void | |
2585 | cifs_reclassify_socket4(struct socket *sock) | |
2586 | { | |
2587 | struct sock *sk = sock->sk; | |
2588 | BUG_ON(sock_owned_by_user(sk)); | |
2589 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2590 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2591 | } | |
2592 | ||
2593 | static inline void | |
2594 | cifs_reclassify_socket6(struct socket *sock) | |
2595 | { | |
2596 | struct sock *sk = sock->sk; | |
2597 | BUG_ON(sock_owned_by_user(sk)); | |
2598 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2599 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2600 | } | |
2601 | #else | |
2602 | static inline void | |
2603 | cifs_reclassify_socket4(struct socket *sock) | |
2604 | { | |
2605 | } | |
2606 | ||
2607 | static inline void | |
2608 | cifs_reclassify_socket6(struct socket *sock) | |
2609 | { | |
2610 | } | |
2611 | #endif | |
2612 | ||
1da177e4 | 2613 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2614 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2615 | { |
50c2f753 | 2616 | unsigned int i, j; |
1da177e4 | 2617 | |
50c2f753 | 2618 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2619 | /* mask a nibble at a time and encode */ |
2620 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2621 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2622 | j += 2; |
1da177e4 LT |
2623 | } |
2624 | ||
2625 | } | |
2626 | ||
3eb9a889 BG |
2627 | static int |
2628 | bind_socket(struct TCP_Server_Info *server) | |
2629 | { | |
2630 | int rc = 0; | |
2631 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2632 | /* Bind to the specified local IP address */ | |
2633 | struct socket *socket = server->ssocket; | |
2634 | rc = socket->ops->bind(socket, | |
2635 | (struct sockaddr *) &server->srcaddr, | |
2636 | sizeof(server->srcaddr)); | |
2637 | if (rc < 0) { | |
2638 | struct sockaddr_in *saddr4; | |
2639 | struct sockaddr_in6 *saddr6; | |
2640 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2641 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2642 | if (saddr6->sin6_family == AF_INET6) | |
2643 | cERROR(1, "cifs: " | |
2644 | "Failed to bind to: %pI6c, error: %d\n", | |
2645 | &saddr6->sin6_addr, rc); | |
2646 | else | |
2647 | cERROR(1, "cifs: " | |
2648 | "Failed to bind to: %pI4, error: %d\n", | |
2649 | &saddr4->sin_addr.s_addr, rc); | |
2650 | } | |
2651 | } | |
2652 | return rc; | |
2653 | } | |
1da177e4 LT |
2654 | |
2655 | static int | |
a9f1b85e | 2656 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2657 | { |
2658 | int rc = 0; | |
a9f1b85e PS |
2659 | /* |
2660 | * some servers require RFC1001 sessinit before sending | |
2661 | * negprot - BB check reconnection in case where second | |
2662 | * sessinit is sent but no second negprot | |
2663 | */ | |
2664 | struct rfc1002_session_packet *ses_init_buf; | |
2665 | struct smb_hdr *smb_buf; | |
2666 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2667 | GFP_KERNEL); | |
2668 | if (ses_init_buf) { | |
2669 | ses_init_buf->trailer.session_req.called_len = 32; | |
2670 | ||
2671 | if (server->server_RFC1001_name && | |
2672 | server->server_RFC1001_name[0] != 0) | |
2673 | rfc1002mangle(ses_init_buf->trailer. | |
2674 | session_req.called_name, | |
2675 | server->server_RFC1001_name, | |
2676 | RFC1001_NAME_LEN_WITH_NULL); | |
2677 | else | |
2678 | rfc1002mangle(ses_init_buf->trailer. | |
2679 | session_req.called_name, | |
2680 | DEFAULT_CIFS_CALLED_NAME, | |
2681 | RFC1001_NAME_LEN_WITH_NULL); | |
2682 | ||
2683 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2684 | ||
2685 | /* | |
2686 | * calling name ends in null (byte 16) from old smb | |
2687 | * convention. | |
2688 | */ | |
2689 | if (server->workstation_RFC1001_name && | |
2690 | server->workstation_RFC1001_name[0] != 0) | |
2691 | rfc1002mangle(ses_init_buf->trailer. | |
2692 | session_req.calling_name, | |
2693 | server->workstation_RFC1001_name, | |
2694 | RFC1001_NAME_LEN_WITH_NULL); | |
2695 | else | |
2696 | rfc1002mangle(ses_init_buf->trailer. | |
2697 | session_req.calling_name, | |
2698 | "LINUX_CIFS_CLNT", | |
2699 | RFC1001_NAME_LEN_WITH_NULL); | |
2700 | ||
2701 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2702 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2703 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2704 | ||
2705 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2706 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2707 | rc = smb_send(server, smb_buf, 0x44); |
2708 | kfree(ses_init_buf); | |
2709 | /* | |
2710 | * RFC1001 layer in at least one server | |
2711 | * requires very short break before negprot | |
2712 | * presumably because not expecting negprot | |
2713 | * to follow so fast. This is a simple | |
2714 | * solution that works without | |
2715 | * complicating the code and causes no | |
2716 | * significant slowing down on mount | |
2717 | * for everyone else | |
2718 | */ | |
2719 | usleep_range(1000, 2000); | |
2720 | } | |
2721 | /* | |
2722 | * else the negprot may still work without this | |
2723 | * even though malloc failed | |
2724 | */ | |
2725 | ||
2726 | return rc; | |
2727 | } | |
2728 | ||
2729 | static int | |
2730 | generic_ip_connect(struct TCP_Server_Info *server) | |
2731 | { | |
2732 | int rc = 0; | |
6da97910 | 2733 | __be16 sport; |
a9f1b85e | 2734 | int slen, sfamily; |
bcf4b106 | 2735 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2736 | struct sockaddr *saddr; |
2737 | ||
2738 | saddr = (struct sockaddr *) &server->dstaddr; | |
2739 | ||
2740 | if (server->dstaddr.ss_family == AF_INET6) { | |
2741 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2742 | slen = sizeof(struct sockaddr_in6); | |
2743 | sfamily = AF_INET6; | |
2744 | } else { | |
2745 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2746 | slen = sizeof(struct sockaddr_in); | |
2747 | sfamily = AF_INET; | |
2748 | } | |
1da177e4 | 2749 | |
bcf4b106 | 2750 | if (socket == NULL) { |
f1d0c998 RL |
2751 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2752 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2753 | if (rc < 0) { |
b6b38f70 | 2754 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2755 | server->ssocket = NULL; |
1da177e4 | 2756 | return rc; |
1da177e4 | 2757 | } |
bcf4b106 JL |
2758 | |
2759 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2760 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2761 | server->ssocket = socket; |
2762 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2763 | if (sfamily == AF_INET6) |
2764 | cifs_reclassify_socket6(socket); | |
2765 | else | |
2766 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2767 | } |
2768 | ||
3eb9a889 BG |
2769 | rc = bind_socket(server); |
2770 | if (rc < 0) | |
2771 | return rc; | |
2772 | ||
bcf4b106 JL |
2773 | /* |
2774 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2775 | * the default. sock_setsockopt not used because it expects |
2776 | * user space buffer | |
bcf4b106 JL |
2777 | */ |
2778 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2779 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2780 | |
b387eaeb | 2781 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2782 | if (server->noautotune) { |
2783 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2784 | socket->sk->sk_sndbuf = 200 * 1024; | |
2785 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2786 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2787 | } |
1da177e4 | 2788 | |
6a5fa236 | 2789 | if (server->tcp_nodelay) { |
a9f1b85e | 2790 | int val = 1; |
6a5fa236 SF |
2791 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2792 | (char *)&val, sizeof(val)); | |
2793 | if (rc) | |
b6b38f70 | 2794 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2795 | } |
2796 | ||
b6b38f70 | 2797 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2798 | socket->sk->sk_sndbuf, |
b6b38f70 | 2799 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2800 | |
ee1b3ea9 JL |
2801 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2802 | if (rc < 0) { | |
2803 | cFYI(1, "Error %d connecting to server", rc); | |
2804 | sock_release(socket); | |
2805 | server->ssocket = NULL; | |
2806 | return rc; | |
2807 | } | |
2808 | ||
a9f1b85e PS |
2809 | if (sport == htons(RFC1001_PORT)) |
2810 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2811 | |
1da177e4 LT |
2812 | return rc; |
2813 | } | |
2814 | ||
2815 | static int | |
a9f1b85e | 2816 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2817 | { |
6da97910 | 2818 | __be16 *sport; |
a9f1b85e PS |
2819 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2820 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2821 | |
a9f1b85e PS |
2822 | if (server->dstaddr.ss_family == AF_INET6) |
2823 | sport = &addr6->sin6_port; | |
2824 | else | |
2825 | sport = &addr->sin_port; | |
1da177e4 | 2826 | |
a9f1b85e PS |
2827 | if (*sport == 0) { |
2828 | int rc; | |
1da177e4 | 2829 | |
a9f1b85e PS |
2830 | /* try with 445 port at first */ |
2831 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2832 | |
a9f1b85e | 2833 | rc = generic_ip_connect(server); |
1da177e4 | 2834 | if (rc >= 0) |
a9f1b85e | 2835 | return rc; |
6a5fa236 | 2836 | |
a9f1b85e PS |
2837 | /* if it failed, try with 139 port */ |
2838 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2839 | } |
2840 | ||
a9f1b85e | 2841 | return generic_ip_connect(server); |
1da177e4 LT |
2842 | } |
2843 | ||
96daf2b0 | 2844 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
2c6292ae | 2845 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
2846 | { |
2847 | /* if we are reconnecting then should we check to see if | |
2848 | * any requested capabilities changed locally e.g. via | |
2849 | * remount but we can not do much about it here | |
2850 | * if they have (even if we could detect it by the following) | |
2851 | * Perhaps we could add a backpointer to array of sb from tcon | |
2852 | * or if we change to make all sb to same share the same | |
2853 | * sb as NFS - then we only have one backpointer to sb. | |
2854 | * What if we wanted to mount the server share twice once with | |
2855 | * and once without posixacls or posix paths? */ | |
2856 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2857 | |
c18c842b SF |
2858 | if (vol_info && vol_info->no_linux_ext) { |
2859 | tcon->fsUnixInfo.Capability = 0; | |
2860 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2861 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2862 | return; |
2863 | } else if (vol_info) | |
2864 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2865 | ||
2866 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2867 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2868 | return; |
2869 | } | |
50c2f753 | 2870 | |
fb8c4b14 | 2871 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2872 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 2873 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
2874 | /* check for reconnect case in which we do not |
2875 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2876 | if (vol_info == NULL) { |
50c2f753 | 2877 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2878 | originally at mount time */ |
2879 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2880 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2881 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2882 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2883 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2884 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2885 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2886 | cERROR(1, "possible reconnect error"); |
2887 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2888 | } |
8af18971 | 2889 | } |
50c2f753 | 2890 | |
6848b733 SF |
2891 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
2892 | cERROR(1, "per-share encryption not supported yet"); | |
2893 | ||
8af18971 | 2894 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2895 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2896 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2897 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2898 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
2899 | if (cifs_sb) |
2900 | cifs_sb->mnt_cifs_flags |= | |
2901 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
2902 | } |
2903 | ||
75865f8c | 2904 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2905 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2906 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2907 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
2908 | if (cifs_sb) |
2909 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
2910 | CIFS_MOUNT_POSIX_PATHS; |
2911 | } | |
50c2f753 | 2912 | |
b6b38f70 | 2913 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2914 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2915 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2916 | cFYI(1, "FCNTL cap"); |
75865f8c | 2917 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2918 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2919 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2920 | cFYI(1, "POSIX path cap"); |
75865f8c | 2921 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2922 | cFYI(1, "XATTR cap"); |
75865f8c | 2923 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2924 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2925 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2926 | cFYI(1, "very large read cap"); |
75865f8c | 2927 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2928 | cFYI(1, "very large write cap"); |
6848b733 SF |
2929 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
2930 | cFYI(1, "transport encryption cap"); | |
2931 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
2932 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
2933 | #endif /* CIFS_DEBUG2 */ |
2934 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2935 | if (vol_info == NULL) { |
b6b38f70 | 2936 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2937 | } else |
b6b38f70 | 2938 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2939 | "with the server failed. Consider " |
2940 | "mounting with the Unix Extensions\n" | |
2941 | "disabled, if problems are found, " | |
2942 | "by specifying the nounix mount " | |
b6b38f70 | 2943 | "option."); |
5a44b319 | 2944 | |
8af18971 SF |
2945 | } |
2946 | } | |
2947 | } | |
2948 | ||
724d9f1c PS |
2949 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
2950 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2951 | { |
2de970ff JL |
2952 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2953 | ||
2ced6f69 AV |
2954 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
2955 | cifs_sb->tlink_tree = RB_ROOT; | |
2956 | ||
25c7f41e | 2957 | /* |
5eba8ab3 JL |
2958 | * Temporarily set r/wsize for matching superblock. If we end up using |
2959 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 2960 | */ |
5eba8ab3 | 2961 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
2962 | cifs_sb->wsize = pvolume_info->wsize; |
2963 | ||
3b795210 SF |
2964 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
2965 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3d3ea8e6 SP |
2966 | if (pvolume_info->backupuid_specified) |
2967 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; | |
2968 | if (pvolume_info->backupgid_specified) | |
2969 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; | |
3b795210 SF |
2970 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; |
2971 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 2972 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 2973 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 2974 | |
6d20e840 | 2975 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 2976 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 2977 | |
3b795210 SF |
2978 | if (pvolume_info->noperm) |
2979 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2980 | if (pvolume_info->setuids) | |
2981 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2982 | if (pvolume_info->server_ino) | |
2983 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2984 | if (pvolume_info->remap) | |
2985 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2986 | if (pvolume_info->no_xattr) | |
2987 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2988 | if (pvolume_info->sfu_emul) | |
2989 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2990 | if (pvolume_info->nobrl) | |
2991 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2992 | if (pvolume_info->nostrictsync) |
4717bed6 | 2993 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2994 | if (pvolume_info->mand_lock) |
2995 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
2996 | if (pvolume_info->rwpidforward) |
2997 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
2998 | if (pvolume_info->cifs_acl) |
2999 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3d3ea8e6 SP |
3000 | if (pvolume_info->backupuid_specified) |
3001 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; | |
3002 | if (pvolume_info->backupgid_specified) | |
3003 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; | |
3b795210 SF |
3004 | if (pvolume_info->override_uid) |
3005 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3006 | if (pvolume_info->override_gid) | |
3007 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3008 | if (pvolume_info->dynperm) | |
3009 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3010 | if (pvolume_info->fsc) |
3011 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3012 | if (pvolume_info->multiuser) |
3013 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3014 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3015 | if (pvolume_info->strict_io) |
3016 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3017 | if (pvolume_info->direct_io) { |
b6b38f70 | 3018 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3019 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3020 | } | |
736a3320 SM |
3021 | if (pvolume_info->mfsymlinks) { |
3022 | if (pvolume_info->sfu_emul) { | |
3023 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3024 | "mount option is used"); | |
3025 | } else { | |
3026 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3027 | } | |
3028 | } | |
3b795210 SF |
3029 | |
3030 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3031 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3032 | "mount option supported"); | |
b1c8d2b4 JL |
3033 | } |
3034 | ||
f7910cbd | 3035 | /* |
5eba8ab3 JL |
3036 | * When the server supports very large reads and writes via POSIX extensions, |
3037 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not | |
3038 | * including the RFC1001 length. | |
f7910cbd JL |
3039 | * |
3040 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
3041 | * writeback however as we have to allocate an array of pointers for the |
3042 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
5eba8ab3 JL |
3043 | * |
3044 | * For reads, there is a similar problem as we need to allocate an array | |
3045 | * of kvecs to handle the receive, though that should only need to be done | |
3046 | * once. | |
f7910cbd | 3047 | */ |
1190f6a0 | 3048 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3049 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3050 | |
3051 | /* | |
5eba8ab3 JL |
3052 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
3053 | * of 2^17-1 minus the size of the call header. That allows for a read or | |
3054 | * write up to the maximum size described by RFC1002. | |
f7910cbd | 3055 | */ |
94443f43 | 3056 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3057 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3058 | |
3059 | /* | |
3060 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
3061 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
3062 | * a single wsize request with a single call. | |
3063 | */ | |
5eba8ab3 JL |
3064 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
3065 | ||
3066 | /* | |
ce91acb3 JL |
3067 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
3068 | * those values when posix extensions aren't in force. In actuality here, we | |
3069 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem | |
3070 | * to be ok with the extra byte even though Windows doesn't send writes that | |
3071 | * are that large. | |
3072 | * | |
3073 | * Citation: | |
3074 | * | |
3075 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx | |
5eba8ab3 JL |
3076 | */ |
3077 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) | |
ce91acb3 | 3078 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
f7910cbd JL |
3079 | |
3080 | static unsigned int | |
96daf2b0 | 3081 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
3082 | { |
3083 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3084 | struct TCP_Server_Info *server = tcon->ses->server; | |
ce91acb3 JL |
3085 | unsigned int wsize; |
3086 | ||
3087 | /* start with specified wsize, or default */ | |
3088 | if (pvolume_info->wsize) | |
3089 | wsize = pvolume_info->wsize; | |
3090 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
3091 | wsize = CIFS_DEFAULT_IOSIZE; | |
3092 | else | |
3093 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
f7910cbd JL |
3094 | |
3095 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
3096 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 3097 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 3098 | |
1190f6a0 JL |
3099 | /* |
3100 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
3101 | * Limit it to max buffer offered by the server, minus the size of the | |
3102 | * WRITEX header, not including the 4 byte RFC1001 length. | |
3103 | */ | |
3104 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
3105 | (!(server->capabilities & CAP_UNIX) && | |
3106 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
3107 | wsize = min_t(unsigned int, wsize, | |
3108 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd JL |
3109 | |
3110 | /* hard limit of CIFS_MAX_WSIZE */ | |
3111 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
3112 | ||
3113 | return wsize; | |
3114 | } | |
3115 | ||
5eba8ab3 JL |
3116 | static unsigned int |
3117 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) | |
3118 | { | |
3119 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3120 | struct TCP_Server_Info *server = tcon->ses->server; | |
3121 | unsigned int rsize, defsize; | |
3122 | ||
3123 | /* | |
3124 | * Set default value... | |
3125 | * | |
3126 | * HACK alert! Ancient servers have very small buffers. Even though | |
3127 | * MS-CIFS indicates that servers are only limited by the client's | |
3128 | * bufsize for reads, testing against win98se shows that it throws | |
3129 | * INVALID_PARAMETER errors if you try to request too large a read. | |
3130 | * | |
3131 | * If the server advertises a MaxBufferSize of less than one page, | |
3132 | * assume that it also can't satisfy reads larger than that either. | |
3133 | * | |
3134 | * FIXME: Is there a better heuristic for this? | |
3135 | */ | |
3136 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
3137 | defsize = CIFS_DEFAULT_IOSIZE; | |
3138 | else if (server->capabilities & CAP_LARGE_READ_X) | |
3139 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
3140 | else if (server->maxBuf >= PAGE_CACHE_SIZE) | |
3141 | defsize = CIFSMaxBufSize; | |
3142 | else | |
3143 | defsize = server->maxBuf - sizeof(READ_RSP); | |
3144 | ||
3145 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; | |
3146 | ||
3147 | /* | |
3148 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
3149 | * the client's MaxBufferSize. | |
3150 | */ | |
3151 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
3152 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
3153 | ||
3154 | /* hard limit of CIFS_MAX_RSIZE */ | |
3155 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
3156 | ||
3157 | return rsize; | |
3158 | } | |
3159 | ||
e4cce94c | 3160 | static int |
96daf2b0 | 3161 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
3162 | struct cifs_sb_info *cifs_sb, const char *full_path) |
3163 | { | |
3164 | int rc; | |
e4cce94c IM |
3165 | FILE_ALL_INFO *pfile_info; |
3166 | ||
e4cce94c IM |
3167 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
3168 | if (pfile_info == NULL) | |
3169 | return -ENOMEM; | |
3170 | ||
3171 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
3172 | 0 /* not legacy */, cifs_sb->local_nls, | |
3173 | cifs_sb->mnt_cifs_flags & | |
3174 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
3175 | |
3176 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
3177 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
3178 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
3179 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
3180 | kfree(pfile_info); |
3181 | return rc; | |
3182 | } | |
3183 | ||
b9bce2e9 JL |
3184 | static void |
3185 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3186 | { |
b946845a | 3187 | kfree(volume_info->username); |
1bfe73c2 | 3188 | kzfree(volume_info->password); |
13589c43 SF |
3189 | if (volume_info->UNCip != volume_info->UNC + 2) |
3190 | kfree(volume_info->UNCip); | |
95c75454 | 3191 | kfree(volume_info->UNC); |
b946845a SF |
3192 | kfree(volume_info->domainname); |
3193 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3194 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3195 | } |
3196 | ||
3197 | void | |
3198 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3199 | { | |
3200 | if (!volume_info) | |
3201 | return; | |
3202 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3203 | kfree(volume_info); |
1bfe73c2 IM |
3204 | } |
3205 | ||
b9bce2e9 | 3206 | |
2d6d589d | 3207 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3208 | /* build_path_to_root returns full path to root when |
3209 | * we do not have an exiting connection (tcon) */ | |
3210 | static char * | |
b2a0fa15 | 3211 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3212 | const struct cifs_sb_info *cifs_sb) |
3213 | { | |
b2a0fa15 JL |
3214 | char *full_path, *pos; |
3215 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3216 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3217 | |
b2a0fa15 | 3218 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3219 | if (full_path == NULL) |
3220 | return ERR_PTR(-ENOMEM); | |
3221 | ||
b2a0fa15 JL |
3222 | strncpy(full_path, vol->UNC, unc_len); |
3223 | pos = full_path + unc_len; | |
3224 | ||
3225 | if (pplen) { | |
3226 | strncpy(pos, vol->prepath, pplen); | |
3227 | pos += pplen; | |
3228 | } | |
3229 | ||
3230 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3231 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3232 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3233 | return full_path; |
3234 | } | |
dd613945 SF |
3235 | |
3236 | /* | |
3237 | * Perform a dfs referral query for a share and (optionally) prefix | |
3238 | * | |
046462ab SF |
3239 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3240 | * to a string containing updated options for the submount. Otherwise it | |
3241 | * will be left untouched. | |
dd613945 SF |
3242 | * |
3243 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3244 | * determine whether there were referrals. | |
3245 | */ | |
3246 | static int | |
96daf2b0 | 3247 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
dd613945 | 3248 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3249 | int check_prefix) |
dd613945 SF |
3250 | { |
3251 | int rc; | |
3252 | unsigned int num_referrals = 0; | |
3253 | struct dfs_info3_param *referrals = NULL; | |
3254 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3255 | ||
3256 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3257 | if (IS_ERR(full_path)) | |
3258 | return PTR_ERR(full_path); | |
3259 | ||
3260 | /* For DFS paths, skip the first '\' of the UNC */ | |
3261 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3262 | ||
3263 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
3264 | &num_referrals, &referrals, | |
3265 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3266 | ||
3267 | if (!rc && num_referrals > 0) { | |
3268 | char *fake_devname = NULL; | |
3269 | ||
3270 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3271 | full_path + 1, referrals, | |
3272 | &fake_devname); | |
3273 | ||
3274 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3275 | |
dd613945 SF |
3276 | if (IS_ERR(mdata)) { |
3277 | rc = PTR_ERR(mdata); | |
3278 | mdata = NULL; | |
b9bce2e9 JL |
3279 | } else { |
3280 | cleanup_volume_info_contents(volume_info); | |
3281 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3282 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3283 | fake_devname); | |
dd613945 | 3284 | } |
b9bce2e9 JL |
3285 | kfree(fake_devname); |
3286 | kfree(cifs_sb->mountdata); | |
046462ab | 3287 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3288 | } |
3289 | kfree(full_path); | |
3290 | return rc; | |
3291 | } | |
2d6d589d | 3292 | #endif |
1bfe73c2 | 3293 | |
04db79b0 JL |
3294 | static int |
3295 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3296 | const char *devname) | |
1da177e4 | 3297 | { |
724d9f1c | 3298 | int rc = 0; |
1da177e4 | 3299 | |
04db79b0 JL |
3300 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3301 | return -EINVAL; | |
1da177e4 | 3302 | |
7586b765 | 3303 | if (volume_info->nullauth) { |
04febabc JL |
3304 | cFYI(1, "Anonymous login"); |
3305 | kfree(volume_info->username); | |
3306 | volume_info->username = NULL; | |
7586b765 | 3307 | } else if (volume_info->username) { |
1da177e4 | 3308 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3309 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3310 | } else { |
bf820679 | 3311 | cifserror("No username specified"); |
50c2f753 SF |
3312 | /* In userspace mount helper we can get user name from alternate |
3313 | locations such as env variables and files on disk */ | |
04db79b0 | 3314 | return -EINVAL; |
1da177e4 LT |
3315 | } |
3316 | ||
1da177e4 | 3317 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3318 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3319 | /* load_nls_default cannot return null */ |
3320 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3321 | } else { |
a5fc4ce0 JL |
3322 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3323 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3324 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3325 | volume_info->iocharset); | |
04db79b0 | 3326 | return -ELIBACC; |
1da177e4 LT |
3327 | } |
3328 | } | |
724d9f1c | 3329 | |
724d9f1c PS |
3330 | return rc; |
3331 | } | |
3332 | ||
04db79b0 JL |
3333 | struct smb_vol * |
3334 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3335 | { | |
3336 | int rc; | |
3337 | struct smb_vol *volume_info; | |
3338 | ||
3339 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3340 | if (!volume_info) | |
3341 | return ERR_PTR(-ENOMEM); | |
3342 | ||
3343 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3344 | if (rc) { | |
3345 | cifs_cleanup_volume_info(volume_info); | |
3346 | volume_info = ERR_PTR(rc); | |
3347 | } | |
3348 | ||
3349 | return volume_info; | |
3350 | } | |
3351 | ||
66bfaadc JL |
3352 | /* make sure ra_pages is a multiple of rsize */ |
3353 | static inline unsigned int | |
3354 | cifs_ra_pages(struct cifs_sb_info *cifs_sb) | |
3355 | { | |
3356 | unsigned int reads; | |
3357 | unsigned int rsize_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; | |
3358 | ||
3359 | if (rsize_pages >= default_backing_dev_info.ra_pages) | |
3360 | return default_backing_dev_info.ra_pages; | |
3361 | else if (rsize_pages == 0) | |
3362 | return rsize_pages; | |
3363 | ||
3364 | reads = default_backing_dev_info.ra_pages / rsize_pages; | |
3365 | return reads * rsize_pages; | |
3366 | } | |
3367 | ||
724d9f1c | 3368 | int |
2c6292ae | 3369 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3370 | { |
1daaae8f | 3371 | int rc; |
724d9f1c | 3372 | int xid; |
96daf2b0 SF |
3373 | struct cifs_ses *pSesInfo; |
3374 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3375 | struct TCP_Server_Info *srvTcp; |
3376 | char *full_path; | |
3377 | struct tcon_link *tlink; | |
3378 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3379 | int referral_walks_count = 0; | |
20547490 | 3380 | #endif |
dd854466 AV |
3381 | |
3382 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3383 | if (rc) | |
3384 | return rc; | |
3385 | ||
20547490 | 3386 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3387 | try_mount_again: |
3388 | /* cleanup activities if we're chasing a referral */ | |
3389 | if (referral_walks_count) { | |
3390 | if (tcon) | |
3391 | cifs_put_tcon(tcon); | |
3392 | else if (pSesInfo) | |
3393 | cifs_put_smb_ses(pSesInfo); | |
3394 | ||
724d9f1c PS |
3395 | FreeXid(xid); |
3396 | } | |
3397 | #endif | |
1daaae8f | 3398 | rc = 0; |
724d9f1c PS |
3399 | tcon = NULL; |
3400 | pSesInfo = NULL; | |
3401 | srvTcp = NULL; | |
3402 | full_path = NULL; | |
3403 | tlink = NULL; | |
3404 | ||
3405 | xid = GetXid(); | |
1da177e4 | 3406 | |
63c038c2 | 3407 | /* get a reference to a tcp session */ |
7586b765 | 3408 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3409 | if (IS_ERR(srvTcp)) { |
3410 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3411 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3412 | goto out; |
1da177e4 LT |
3413 | } |
3414 | ||
36988c76 JL |
3415 | /* get a reference to a SMB session */ |
3416 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3417 | if (IS_ERR(pSesInfo)) { | |
3418 | rc = PTR_ERR(pSesInfo); | |
3419 | pSesInfo = NULL; | |
3420 | goto mount_fail_check; | |
1da177e4 | 3421 | } |
50c2f753 | 3422 | |
d00c28de JL |
3423 | /* search for existing tcon to this server share */ |
3424 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3425 | if (IS_ERR(tcon)) { | |
3426 | rc = PTR_ERR(tcon); | |
3427 | tcon = NULL; | |
1bfe73c2 | 3428 | goto remote_path_check; |
d00c28de | 3429 | } |
1bfe73c2 | 3430 | |
d82c2df5 | 3431 | /* tell server which Unix caps we support */ |
6848b733 | 3432 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3433 | /* reset of caps checks mount to see if unix extensions |
3434 | disabled for just this mount */ | |
2c6292ae | 3435 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3436 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3437 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3438 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3439 | rc = -EACCES; | |
3440 | goto mount_fail_check; | |
3441 | } | |
3442 | } else | |
d82c2df5 | 3443 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3444 | |
6848b733 SF |
3445 | /* do not care if following two calls succeed - informational */ |
3446 | if (!tcon->ipc) { | |
3447 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3448 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3449 | } | |
3450 | ||
f7910cbd | 3451 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
5eba8ab3 | 3452 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
f7910cbd | 3453 | |
66bfaadc JL |
3454 | /* tune readahead according to rsize */ |
3455 | cifs_sb->bdi.ra_pages = cifs_ra_pages(cifs_sb); | |
f7910cbd | 3456 | |
1bfe73c2 | 3457 | remote_path_check: |
c1508ca2 SF |
3458 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3459 | /* | |
3460 | * Perform an unconditional check for whether there are DFS | |
3461 | * referrals for this path without prefix, to provide support | |
3462 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3463 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3464 | * Chase the referral if found, otherwise continue normally. | |
3465 | */ | |
3466 | if (referral_walks_count == 0) { | |
3467 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3468 | cifs_sb, false); |
c1508ca2 SF |
3469 | if (!refrc) { |
3470 | referral_walks_count++; | |
3471 | goto try_mount_again; | |
3472 | } | |
3473 | } | |
3474 | #endif | |
3475 | ||
f87d39d9 | 3476 | /* check if a whole path is not remote */ |
70945643 | 3477 | if (!rc && tcon) { |
e4cce94c | 3478 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3479 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3480 | if (full_path == NULL) { |
3481 | rc = -ENOMEM; | |
3482 | goto mount_fail_check; | |
3483 | } | |
3484 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3485 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3486 | kfree(full_path); |
3487 | goto mount_fail_check; | |
3488 | } | |
3489 | kfree(full_path); | |
3490 | } | |
3491 | ||
1bfe73c2 IM |
3492 | /* get referral if needed */ |
3493 | if (rc == -EREMOTE) { | |
d036f50f | 3494 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3495 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3496 | /* | |
3497 | * BB: when we implement proper loop detection, | |
3498 | * we will remove this check. But now we need it | |
3499 | * to prevent an indefinite loop if 'DFS tree' is | |
3500 | * misconfigured (i.e. has loops). | |
3501 | */ | |
3502 | rc = -ELOOP; | |
3503 | goto mount_fail_check; | |
3504 | } | |
1bfe73c2 | 3505 | |
dd613945 | 3506 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3507 | true); |
7b91e266 | 3508 | |
dd613945 | 3509 | if (!rc) { |
5c2503a8 | 3510 | referral_walks_count++; |
1bfe73c2 IM |
3511 | goto try_mount_again; |
3512 | } | |
dd613945 | 3513 | goto mount_fail_check; |
d036f50f SF |
3514 | #else /* No DFS support, return error on mount */ |
3515 | rc = -EOPNOTSUPP; | |
3516 | #endif | |
1bfe73c2 IM |
3517 | } |
3518 | ||
9d002df4 JL |
3519 | if (rc) |
3520 | goto mount_fail_check; | |
3521 | ||
3522 | /* now, hang the tcon off of the superblock */ | |
3523 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3524 | if (tlink == NULL) { | |
3525 | rc = -ENOMEM; | |
3526 | goto mount_fail_check; | |
3527 | } | |
3528 | ||
b647c35f | 3529 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3530 | tlink->tl_tcon = tcon; |
3531 | tlink->tl_time = jiffies; | |
3532 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3533 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3534 | ||
b647c35f | 3535 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3536 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3537 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3538 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3539 | |
da472fc8 | 3540 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3541 | TLINK_IDLE_EXPIRE); |
3542 | ||
1bfe73c2 IM |
3543 | mount_fail_check: |
3544 | /* on error free sesinfo and tcon struct if needed */ | |
3545 | if (rc) { | |
1bfe73c2 | 3546 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3547 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3548 | if (tcon) |
3549 | cifs_put_tcon(tcon); | |
3550 | else if (pSesInfo) | |
3551 | cifs_put_smb_ses(pSesInfo); | |
3552 | else | |
3553 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3554 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3555 | } |
3556 | ||
70fe7dc0 | 3557 | out: |
1da177e4 LT |
3558 | FreeXid(xid); |
3559 | return rc; | |
3560 | } | |
3561 | ||
8d1bca32 JL |
3562 | /* |
3563 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3564 | * pointer may be NULL. | |
3565 | */ | |
1da177e4 | 3566 | int |
96daf2b0 SF |
3567 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
3568 | const char *tree, struct cifs_tcon *tcon, | |
1da177e4 LT |
3569 | const struct nls_table *nls_codepage) |
3570 | { | |
3571 | struct smb_hdr *smb_buffer; | |
3572 | struct smb_hdr *smb_buffer_response; | |
3573 | TCONX_REQ *pSMB; | |
3574 | TCONX_RSP *pSMBr; | |
3575 | unsigned char *bcc_ptr; | |
3576 | int rc = 0; | |
690c522f JL |
3577 | int length; |
3578 | __u16 bytes_left, count; | |
1da177e4 LT |
3579 | |
3580 | if (ses == NULL) | |
3581 | return -EIO; | |
3582 | ||
3583 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3584 | if (smb_buffer == NULL) |
1da177e4 | 3585 | return -ENOMEM; |
ca43e3be | 3586 | |
1da177e4 LT |
3587 | smb_buffer_response = smb_buffer; |
3588 | ||
3589 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3590 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3591 | |
3592 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3593 | smb_buffer->Uid = ses->Suid; |
3594 | pSMB = (TCONX_REQ *) smb_buffer; | |
3595 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3596 | ||
3597 | pSMB->AndXCommand = 0xFF; | |
3598 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3599 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3600 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3601 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3602 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3603 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3604 | /* already aligned so no need to do it below */ |
eeac8047 | 3605 | } else { |
540b2e37 | 3606 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3607 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3608 | specified as required (when that support is added to | |
3609 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3610 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3611 | by Samba (not sure whether other servers allow |
3612 | NTLMv2 password here) */ | |
7c7b25bc | 3613 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3614 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3615 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3616 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3617 | ses->server->sec_mode & |
4e53a3fb JL |
3618 | SECMODE_PW_ENCRYPT ? true : false, |
3619 | bcc_ptr); | |
7c7b25bc SF |
3620 | else |
3621 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3622 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3623 | bcc_ptr, nls_codepage); |
eeac8047 | 3624 | |
540b2e37 | 3625 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3626 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3627 | /* must align unicode strings */ |
3628 | *bcc_ptr = 0; /* null byte password */ | |
3629 | bcc_ptr++; | |
3630 | } | |
eeac8047 | 3631 | } |
1da177e4 | 3632 | |
96daf2b0 | 3633 | if (ses->server->sec_mode & |
a878fb22 | 3634 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3635 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3636 | ||
3637 | if (ses->capabilities & CAP_STATUS32) { | |
3638 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3639 | } | |
3640 | if (ses->capabilities & CAP_DFS) { | |
3641 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3642 | } | |
3643 | if (ses->capabilities & CAP_UNICODE) { | |
3644 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3645 | length = | |
acbbb76a | 3646 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3647 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3648 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3649 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3650 | bcc_ptr += 2; /* skip trailing null */ |
3651 | } else { /* ASCII */ | |
1da177e4 LT |
3652 | strcpy(bcc_ptr, tree); |
3653 | bcc_ptr += strlen(tree) + 1; | |
3654 | } | |
3655 | strcpy(bcc_ptr, "?????"); | |
3656 | bcc_ptr += strlen("?????"); | |
3657 | bcc_ptr += 1; | |
3658 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3659 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3660 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3661 | pSMB->ByteCount = cpu_to_le16(count); |
3662 | ||
133672ef | 3663 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3664 | 0); |
1da177e4 | 3665 | |
1da177e4 LT |
3666 | /* above now done in SendReceive */ |
3667 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3668 | bool is_unicode; |
3669 | ||
1da177e4 | 3670 | tcon->tidStatus = CifsGood; |
3b795210 | 3671 | tcon->need_reconnect = false; |
1da177e4 LT |
3672 | tcon->tid = smb_buffer_response->Tid; |
3673 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3674 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3675 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3676 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3677 | is_unicode = true; | |
3678 | else | |
3679 | is_unicode = false; | |
3680 | ||
cc20c031 | 3681 | |
50c2f753 | 3682 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3683 | if (length == 3) { |
3684 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3685 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3686 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3687 | tcon->ipc = 1; |
3688 | } | |
3689 | } else if (length == 2) { | |
3690 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3691 | /* the most common case */ | |
b6b38f70 | 3692 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3693 | } |
3694 | } | |
50c2f753 | 3695 | bcc_ptr += length + 1; |
cc20c031 | 3696 | bytes_left -= (length + 1); |
1da177e4 | 3697 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3698 | |
3699 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3700 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3701 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3702 | bytes_left, is_unicode, |
cc20c031 JL |
3703 | nls_codepage); |
3704 | ||
b6b38f70 | 3705 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3706 | |
fb8c4b14 | 3707 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3708 | (smb_buffer_response->WordCount == 7)) |
3709 | /* field is in same location */ | |
3979877e SF |
3710 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3711 | else | |
3712 | tcon->Flags = 0; | |
b6b38f70 | 3713 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3714 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3715 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3716 | ses->ipc_tid = smb_buffer_response->Tid; |
3717 | } | |
3718 | ||
a8a11d39 | 3719 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3720 | return rc; |
3721 | } | |
3722 | ||
2a9b9951 AV |
3723 | void |
3724 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3725 | { |
b647c35f JL |
3726 | struct rb_root *root = &cifs_sb->tlink_tree; |
3727 | struct rb_node *node; | |
3728 | struct tcon_link *tlink; | |
9d002df4 | 3729 | |
2de970ff JL |
3730 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3731 | ||
b647c35f JL |
3732 | spin_lock(&cifs_sb->tlink_tree_lock); |
3733 | while ((node = rb_first(root))) { | |
3734 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3735 | cifs_get_tlink(tlink); | |
3736 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3737 | rb_erase(node, root); | |
1da177e4 | 3738 | |
b647c35f JL |
3739 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3740 | cifs_put_tlink(tlink); | |
3741 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3742 | } | |
3743 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3744 | |
dd854466 | 3745 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3746 | kfree(cifs_sb->mountdata); |
3747 | unload_nls(cifs_sb->local_nls); | |
3748 | kfree(cifs_sb); | |
50c2f753 | 3749 | } |
1da177e4 | 3750 | |
96daf2b0 | 3751 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
1da177e4 LT |
3752 | { |
3753 | int rc = 0; | |
198b5682 | 3754 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3755 | |
198b5682 JL |
3756 | /* only send once per connect */ |
3757 | if (server->maxBuf != 0) | |
3758 | return 0; | |
3759 | ||
2d86dbc9 | 3760 | cifs_set_credits(server, 1); |
198b5682 JL |
3761 | rc = CIFSSMBNegotiate(xid, ses); |
3762 | if (rc == -EAGAIN) { | |
3763 | /* retry only once on 1st time connection */ | |
2d86dbc9 | 3764 | cifs_set_credits(server, 1); |
198b5682 JL |
3765 | rc = CIFSSMBNegotiate(xid, ses); |
3766 | if (rc == -EAGAIN) | |
3767 | rc = -EHOSTDOWN; | |
1da177e4 | 3768 | } |
198b5682 JL |
3769 | if (rc == 0) { |
3770 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3771 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3772 | server->tcpStatus = CifsGood; |
3773 | else | |
3774 | rc = -EHOSTDOWN; | |
3775 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3776 | |
198b5682 JL |
3777 | } |
3778 | ||
3779 | return rc; | |
3780 | } | |
3781 | ||
3782 | ||
96daf2b0 | 3783 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
198b5682 JL |
3784 | struct nls_table *nls_info) |
3785 | { | |
3786 | int rc = 0; | |
3787 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3788 | |
198b5682 JL |
3789 | ses->flags = 0; |
3790 | ses->capabilities = server->capabilities; | |
26b994fa | 3791 | if (linuxExtEnabled == 0) |
198b5682 | 3792 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3793 | |
b6b38f70 | 3794 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 3795 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3796 | |
198b5682 | 3797 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3798 | if (rc) { |
b6b38f70 | 3799 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3800 | } else { |
5d0d2882 SP |
3801 | mutex_lock(&ses->server->srv_mutex); |
3802 | if (!server->session_estab) { | |
21e73393 | 3803 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3804 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3805 | server->sequence_number = 0x2; |
3806 | server->session_estab = true; | |
3807 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3808 | } |
3809 | mutex_unlock(&server->srv_mutex); | |
3810 | ||
b6b38f70 | 3811 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3812 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3813 | ses->status = CifsGood; |
3814 | ses->need_reconnect = false; | |
20418acd | 3815 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3816 | } |
26b994fa | 3817 | |
21e73393 SP |
3818 | kfree(ses->auth_key.response); |
3819 | ses->auth_key.response = NULL; | |
3820 | ses->auth_key.len = 0; | |
d3686d54 SP |
3821 | kfree(ses->ntlmssp); |
3822 | ses->ntlmssp = NULL; | |
21e73393 | 3823 | |
1da177e4 LT |
3824 | return rc; |
3825 | } | |
3826 | ||
8a8798a5 JL |
3827 | static int |
3828 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3829 | { | |
3830 | switch (ses->server->secType) { | |
3831 | case Kerberos: | |
3832 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
3833 | return 0; | |
3834 | case NTLMv2: | |
3835 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
3836 | break; | |
3837 | case NTLM: | |
3838 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
3839 | break; | |
3840 | case RawNTLMSSP: | |
3841 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
3842 | break; | |
3843 | case LANMAN: | |
3844 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
3845 | break; | |
3846 | } | |
3847 | ||
3848 | return cifs_set_cifscreds(vol, ses); | |
3849 | } | |
3850 | ||
96daf2b0 | 3851 | static struct cifs_tcon * |
9d002df4 JL |
3852 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3853 | { | |
8a8798a5 | 3854 | int rc; |
96daf2b0 SF |
3855 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3856 | struct cifs_ses *ses; | |
3857 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3858 | struct smb_vol *vol_info; |
9d002df4 JL |
3859 | |
3860 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3861 | if (vol_info == NULL) |
3862 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3863 | |
9d002df4 JL |
3864 | vol_info->local_nls = cifs_sb->local_nls; |
3865 | vol_info->linux_uid = fsuid; | |
3866 | vol_info->cred_uid = fsuid; | |
3867 | vol_info->UNC = master_tcon->treeName; | |
3868 | vol_info->retry = master_tcon->retry; | |
3869 | vol_info->nocase = master_tcon->nocase; | |
3870 | vol_info->local_lease = master_tcon->local_lease; | |
3871 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3872 | ||
8a8798a5 JL |
3873 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3874 | if (rc) { | |
3875 | tcon = ERR_PTR(rc); | |
3876 | goto out; | |
3877 | } | |
9d002df4 JL |
3878 | |
3879 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3880 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3881 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3882 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3883 | |
3884 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3885 | if (IS_ERR(ses)) { | |
96daf2b0 | 3886 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3887 | cifs_put_tcp_session(master_tcon->ses->server); |
3888 | goto out; | |
3889 | } | |
3890 | ||
3891 | tcon = cifs_get_tcon(ses, vol_info); | |
3892 | if (IS_ERR(tcon)) { | |
3893 | cifs_put_smb_ses(ses); | |
3894 | goto out; | |
3895 | } | |
3896 | ||
3897 | if (ses->capabilities & CAP_UNIX) | |
3898 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3899 | out: | |
8a8798a5 JL |
3900 | kfree(vol_info->username); |
3901 | kfree(vol_info->password); | |
9d002df4 JL |
3902 | kfree(vol_info); |
3903 | ||
3904 | return tcon; | |
3905 | } | |
3906 | ||
96daf2b0 | 3907 | struct cifs_tcon * |
9d002df4 JL |
3908 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3909 | { | |
3910 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3911 | } | |
3912 | ||
3913 | static int | |
3914 | cifs_sb_tcon_pending_wait(void *unused) | |
3915 | { | |
3916 | schedule(); | |
3917 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3918 | } | |
3919 | ||
b647c35f JL |
3920 | /* find and return a tlink with given uid */ |
3921 | static struct tcon_link * | |
3922 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3923 | { | |
3924 | struct rb_node *node = root->rb_node; | |
3925 | struct tcon_link *tlink; | |
3926 | ||
3927 | while (node) { | |
3928 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3929 | ||
3930 | if (tlink->tl_uid > uid) | |
3931 | node = node->rb_left; | |
3932 | else if (tlink->tl_uid < uid) | |
3933 | node = node->rb_right; | |
3934 | else | |
3935 | return tlink; | |
3936 | } | |
3937 | return NULL; | |
3938 | } | |
3939 | ||
3940 | /* insert a tcon_link into the tree */ | |
3941 | static void | |
3942 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3943 | { | |
3944 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3945 | struct tcon_link *tlink; | |
3946 | ||
3947 | while (*new) { | |
3948 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3949 | parent = *new; | |
3950 | ||
3951 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3952 | new = &((*new)->rb_left); | |
3953 | else | |
3954 | new = &((*new)->rb_right); | |
3955 | } | |
3956 | ||
3957 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3958 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3959 | } | |
3960 | ||
9d002df4 JL |
3961 | /* |
3962 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3963 | * current task. | |
3964 | * | |
3965 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3966 | * the master tcon for the mount. | |
3967 | * | |
6ef933a3 | 3968 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3969 | * exists, then check to see if it's pending construction. If it is then wait |
3970 | * for construction to complete. Once it's no longer pending, check to see if | |
3971 | * it failed and either return an error or retry construction, depending on | |
3972 | * the timeout. | |
3973 | * | |
3974 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3975 | * try to construct a new one. | |
3976 | */ | |
3977 | struct tcon_link * | |
3978 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3979 | { | |
3980 | int ret; | |
b647c35f | 3981 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3982 | struct tcon_link *tlink, *newtlink; |
3983 | ||
3984 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3985 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3986 | ||
3987 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3988 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3989 | if (tlink) |
3990 | cifs_get_tlink(tlink); | |
3991 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3992 | ||
3993 | if (tlink == NULL) { | |
3994 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3995 | if (newtlink == NULL) | |
3996 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3997 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3998 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3999 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4000 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4001 | cifs_get_tlink(newtlink); | |
4002 | ||
9d002df4 JL |
4003 | spin_lock(&cifs_sb->tlink_tree_lock); |
4004 | /* was one inserted after previous search? */ | |
b647c35f | 4005 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4006 | if (tlink) { |
4007 | cifs_get_tlink(tlink); | |
4008 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4009 | kfree(newtlink); |
4010 | goto wait_for_construction; | |
4011 | } | |
9d002df4 | 4012 | tlink = newtlink; |
b647c35f JL |
4013 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4014 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4015 | } else { |
4016 | wait_for_construction: | |
4017 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4018 | cifs_sb_tcon_pending_wait, | |
4019 | TASK_INTERRUPTIBLE); | |
4020 | if (ret) { | |
4021 | cifs_put_tlink(tlink); | |
4022 | return ERR_PTR(ret); | |
4023 | } | |
4024 | ||
4025 | /* if it's good, return it */ | |
4026 | if (!IS_ERR(tlink->tl_tcon)) | |
4027 | return tlink; | |
4028 | ||
4029 | /* return error if we tried this already recently */ | |
4030 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4031 | cifs_put_tlink(tlink); | |
4032 | return ERR_PTR(-EACCES); | |
4033 | } | |
4034 | ||
4035 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4036 | goto wait_for_construction; | |
4037 | } | |
4038 | ||
4039 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4040 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4041 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4042 | ||
4043 | if (IS_ERR(tlink->tl_tcon)) { | |
4044 | cifs_put_tlink(tlink); | |
4045 | return ERR_PTR(-EACCES); | |
4046 | } | |
4047 | ||
4048 | return tlink; | |
4049 | } | |
2de970ff JL |
4050 | |
4051 | /* | |
4052 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4053 | * out tcons. | |
4054 | */ | |
4055 | static void | |
4056 | cifs_prune_tlinks(struct work_struct *work) | |
4057 | { | |
4058 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4059 | prune_tlinks.work); | |
b647c35f JL |
4060 | struct rb_root *root = &cifs_sb->tlink_tree; |
4061 | struct rb_node *node = rb_first(root); | |
4062 | struct rb_node *tmp; | |
4063 | struct tcon_link *tlink; | |
2de970ff | 4064 | |
b647c35f JL |
4065 | /* |
4066 | * Because we drop the spinlock in the loop in order to put the tlink | |
4067 | * it's not guarded against removal of links from the tree. The only | |
4068 | * places that remove entries from the tree are this function and | |
4069 | * umounts. Because this function is non-reentrant and is canceled | |
4070 | * before umount can proceed, this is safe. | |
4071 | */ | |
4072 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4073 | node = rb_first(root); | |
4074 | while (node != NULL) { | |
4075 | tmp = node; | |
4076 | node = rb_next(tmp); | |
4077 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4078 | ||
4079 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4080 | atomic_read(&tlink->tl_count) != 0 || | |
4081 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4082 | continue; | |
2de970ff | 4083 | |
b647c35f JL |
4084 | cifs_get_tlink(tlink); |
4085 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4086 | rb_erase(tmp, root); | |
4087 | ||
4088 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4089 | cifs_put_tlink(tlink); | |
4090 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4091 | } | |
4092 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4093 | |
da472fc8 | 4094 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4095 | TLINK_IDLE_EXPIRE); |
4096 | } |