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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
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); | |
146 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) | |
ad8b15f0 | 147 | mid_entry->midState = 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 | */ | |
c974befa | 186 | static int check2ndT2(struct smb_hdr *pSMB) |
e4eb295d | 187 | { |
fb8c4b14 | 188 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 189 | int remaining; |
26ec2548 | 190 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 191 | |
fb8c4b14 | 192 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
193 | return 0; |
194 | ||
fb8c4b14 SF |
195 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
196 | /* check for parm and data offset going beyond end of smb */ | |
197 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 198 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
199 | return -EINVAL; |
200 | } | |
201 | ||
202 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
203 | ||
26ec2548 JL |
204 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
205 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 206 | |
c0c7b905 | 207 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 208 | return 0; |
c0c7b905 | 209 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
210 | cFYI(1, "total data %d smaller than data in frame %d", |
211 | total_data_size, data_in_this_rsp); | |
e4eb295d | 212 | return -EINVAL; |
e4eb295d | 213 | } |
c0c7b905 JL |
214 | |
215 | remaining = total_data_size - data_in_this_rsp; | |
216 | ||
217 | cFYI(1, "missing %d bytes from transact2, check next response", | |
218 | remaining); | |
c974befa | 219 | if (total_data_size > CIFSMaxBufSize) { |
c0c7b905 | 220 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
c974befa | 221 | total_data_size, CIFSMaxBufSize); |
c0c7b905 JL |
222 | return -EINVAL; |
223 | } | |
224 | return remaining; | |
e4eb295d SF |
225 | } |
226 | ||
fb8c4b14 | 227 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d | 228 | { |
f5fffcee | 229 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)psecond; |
e4eb295d | 230 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; |
f5fffcee JL |
231 | char *data_area_of_tgt; |
232 | char *data_area_of_src; | |
26ec2548 | 233 | int remaining; |
f5fffcee JL |
234 | unsigned int byte_count, total_in_tgt; |
235 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
e4eb295d | 236 | |
f5fffcee JL |
237 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); |
238 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
e4eb295d | 239 | |
f5fffcee JL |
240 | if (tgt_total_cnt != src_total_cnt) |
241 | cFYI(1, "total data count of primary and secondary t2 differ " | |
242 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); | |
e4eb295d | 243 | |
f5fffcee | 244 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d | 245 | |
f5fffcee | 246 | remaining = tgt_total_cnt - total_in_tgt; |
50c2f753 | 247 | |
f5fffcee JL |
248 | if (remaining < 0) { |
249 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " | |
250 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); | |
2a2047bc | 251 | return -EPROTO; |
f5fffcee | 252 | } |
e4eb295d | 253 | |
f5fffcee JL |
254 | if (remaining == 0) { |
255 | /* nothing to do, ignore */ | |
256 | cFYI(1, "no more data remains"); | |
e4eb295d | 257 | return 0; |
f5fffcee | 258 | } |
50c2f753 | 259 | |
f5fffcee JL |
260 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); |
261 | if (remaining < total_in_src) | |
b6b38f70 | 262 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
263 | |
264 | /* find end of first SMB data area */ | |
f5fffcee | 265 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 266 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d | 267 | |
f5fffcee JL |
268 | /* validate target area */ |
269 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
270 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
e4eb295d | 271 | |
f5fffcee | 272 | data_area_of_tgt += total_in_tgt; |
e4eb295d | 273 | |
f5fffcee | 274 | total_in_tgt += total_in_src; |
2a2047bc | 275 | /* is the result too big for the field? */ |
f5fffcee JL |
276 | if (total_in_tgt > USHRT_MAX) { |
277 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); | |
2a2047bc | 278 | return -EPROTO; |
f5fffcee JL |
279 | } |
280 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
2a2047bc JL |
281 | |
282 | /* fix up the BCC */ | |
820a803f | 283 | byte_count = get_bcc(pTargetSMB); |
f5fffcee | 284 | byte_count += total_in_src; |
2a2047bc | 285 | /* is the result too big for the field? */ |
f5fffcee JL |
286 | if (byte_count > USHRT_MAX) { |
287 | cFYI(1, "coalesced BCC too large (%u)", byte_count); | |
2a2047bc | 288 | return -EPROTO; |
f5fffcee | 289 | } |
820a803f | 290 | put_bcc(byte_count, pTargetSMB); |
e4eb295d | 291 | |
be8e3b00 | 292 | byte_count = be32_to_cpu(pTargetSMB->smb_buf_length); |
f5fffcee | 293 | byte_count += total_in_src; |
2a2047bc | 294 | /* don't allow buffer to overflow */ |
f5fffcee JL |
295 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
296 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); | |
2a2047bc | 297 | return -ENOBUFS; |
f5fffcee | 298 | } |
be8e3b00 | 299 | pTargetSMB->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 300 | |
f5fffcee JL |
301 | /* copy second buffer into end of first buffer */ |
302 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
2a2047bc | 303 | |
f5fffcee JL |
304 | if (remaining != total_in_src) { |
305 | /* more responses to go */ | |
306 | cFYI(1, "waiting for more secondary responses"); | |
e4eb295d | 307 | return 1; |
f5fffcee JL |
308 | } |
309 | ||
310 | /* we are done */ | |
311 | cFYI(1, "found the last secondary response"); | |
312 | return 0; | |
e4eb295d SF |
313 | } |
314 | ||
c74093b6 JL |
315 | static void |
316 | cifs_echo_request(struct work_struct *work) | |
317 | { | |
318 | int rc; | |
319 | struct TCP_Server_Info *server = container_of(work, | |
320 | struct TCP_Server_Info, echo.work); | |
321 | ||
247ec9b4 | 322 | /* |
195291e6 JL |
323 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
324 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
325 | * we got a response recently | |
247ec9b4 | 326 | */ |
195291e6 | 327 | if (server->maxBuf == 0 || |
247ec9b4 | 328 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
329 | goto requeue_echo; |
330 | ||
331 | rc = CIFSSMBEcho(server); | |
332 | if (rc) | |
333 | cFYI(1, "Unable to send echo request to server: %s", | |
334 | server->hostname); | |
335 | ||
336 | requeue_echo: | |
337 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
338 | } | |
339 | ||
3d9c2472 | 340 | static bool |
2a37ef94 | 341 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 342 | { |
2a37ef94 JL |
343 | if (!server->bigbuf) { |
344 | server->bigbuf = (char *)cifs_buf_get(); | |
345 | if (!server->bigbuf) { | |
3d9c2472 PS |
346 | cERROR(1, "No memory for large SMB response"); |
347 | msleep(3000); | |
348 | /* retry will check if exiting */ | |
349 | return false; | |
350 | } | |
2a37ef94 | 351 | } else if (server->large_buf) { |
3d9c2472 | 352 | /* we are reusing a dirty large buf, clear its start */ |
2a37ef94 | 353 | memset(server->bigbuf, 0, sizeof(struct smb_hdr)); |
3d9c2472 PS |
354 | } |
355 | ||
2a37ef94 JL |
356 | if (!server->smallbuf) { |
357 | server->smallbuf = (char *)cifs_small_buf_get(); | |
358 | if (!server->smallbuf) { | |
3d9c2472 PS |
359 | cERROR(1, "No memory for SMB response"); |
360 | msleep(1000); | |
361 | /* retry will check if exiting */ | |
362 | return false; | |
363 | } | |
364 | /* beginning of smb buffer is cleared in our buf_get */ | |
365 | } else { | |
366 | /* if existing small buf clear beginning */ | |
2a37ef94 | 367 | memset(server->smallbuf, 0, sizeof(struct smb_hdr)); |
3d9c2472 PS |
368 | } |
369 | ||
3d9c2472 PS |
370 | return true; |
371 | } | |
372 | ||
ba749e6d JL |
373 | static bool |
374 | server_unresponsive(struct TCP_Server_Info *server) | |
375 | { | |
6dae51a5 PS |
376 | /* |
377 | * We need to wait 2 echo intervals to make sure we handle such | |
378 | * situations right: | |
379 | * 1s client sends a normal SMB request | |
380 | * 2s client gets a response | |
381 | * 30s echo workqueue job pops, and decides we got a response recently | |
382 | * and don't need to send another | |
383 | * ... | |
384 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
385 | * a response in >60s. | |
386 | */ | |
387 | if (server->tcpStatus == CifsGood && | |
388 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
389 | cERROR(1, "Server %s has not responded in %d seconds. " |
390 | "Reconnecting...", server->hostname, | |
6dae51a5 | 391 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
392 | cifs_reconnect(server); |
393 | wake_up(&server->response_q); | |
394 | return true; | |
395 | } | |
396 | ||
397 | return false; | |
398 | } | |
399 | ||
42c4dfc2 JL |
400 | /* |
401 | * kvec_array_init - clone a kvec array, and advance into it | |
402 | * @new: pointer to memory for cloned array | |
403 | * @iov: pointer to original array | |
404 | * @nr_segs: number of members in original array | |
405 | * @bytes: number of bytes to advance into the cloned array | |
406 | * | |
407 | * This function will copy the array provided in iov to a section of memory | |
408 | * and advance the specified number of bytes into the new array. It returns | |
409 | * the number of segments in the new array. "new" must be at least as big as | |
410 | * the original iov array. | |
411 | */ | |
412 | static unsigned int | |
413 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
414 | size_t bytes) | |
415 | { | |
416 | size_t base = 0; | |
417 | ||
418 | while (bytes || !iov->iov_len) { | |
419 | int copy = min(bytes, iov->iov_len); | |
420 | ||
421 | bytes -= copy; | |
422 | base += copy; | |
423 | if (iov->iov_len == base) { | |
424 | iov++; | |
425 | nr_segs--; | |
426 | base = 0; | |
427 | } | |
428 | } | |
429 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
430 | new->iov_base += base; | |
431 | new->iov_len -= base; | |
432 | return nr_segs; | |
433 | } | |
434 | ||
1041e3f9 JL |
435 | static struct kvec * |
436 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 437 | { |
1041e3f9 JL |
438 | struct kvec *new_iov; |
439 | ||
440 | if (server->iov && nr_segs <= server->nr_iov) | |
441 | return server->iov; | |
442 | ||
443 | /* not big enough -- allocate a new one and release the old */ | |
444 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
445 | if (new_iov) { | |
446 | kfree(server->iov); | |
447 | server->iov = new_iov; | |
448 | server->nr_iov = nr_segs; | |
449 | } | |
450 | return new_iov; | |
451 | } | |
452 | ||
e28bc5b1 JL |
453 | int |
454 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
455 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 456 | { |
a52c1eb7 JL |
457 | int length = 0; |
458 | int total_read; | |
42c4dfc2 | 459 | unsigned int segs; |
e831e6cf | 460 | struct msghdr smb_msg; |
42c4dfc2 JL |
461 | struct kvec *iov; |
462 | ||
1041e3f9 | 463 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
464 | if (!iov) |
465 | return -ENOMEM; | |
e7015fb1 | 466 | |
e831e6cf JL |
467 | smb_msg.msg_control = NULL; |
468 | smb_msg.msg_controllen = 0; | |
469 | ||
a52c1eb7 | 470 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
471 | try_to_freeze(); |
472 | ||
ba749e6d | 473 | if (server_unresponsive(server)) { |
a52c1eb7 | 474 | total_read = -EAGAIN; |
ba749e6d JL |
475 | break; |
476 | } | |
477 | ||
42c4dfc2 JL |
478 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
479 | ||
480 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
481 | iov, segs, to_read, 0); | |
e7015fb1 | 482 | |
e7015fb1 | 483 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 484 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
485 | break; |
486 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
487 | cifs_reconnect(server); | |
a52c1eb7 | 488 | total_read = -EAGAIN; |
e7015fb1 PS |
489 | break; |
490 | } else if (length == -ERESTARTSYS || | |
491 | length == -EAGAIN || | |
492 | length == -EINTR) { | |
493 | /* | |
494 | * Minimum sleep to prevent looping, allowing socket | |
495 | * to clear and app threads to set tcpStatus | |
496 | * CifsNeedReconnect if server hung. | |
497 | */ | |
498 | usleep_range(1000, 2000); | |
499 | length = 0; | |
a52c1eb7 | 500 | continue; |
e7015fb1 | 501 | } else if (length <= 0) { |
a52c1eb7 JL |
502 | cFYI(1, "Received no data or error: expecting %d " |
503 | "got %d", to_read, length); | |
e7015fb1 | 504 | cifs_reconnect(server); |
a52c1eb7 | 505 | total_read = -EAGAIN; |
e7015fb1 PS |
506 | break; |
507 | } | |
508 | } | |
a52c1eb7 | 509 | return total_read; |
e7015fb1 | 510 | } |
e7015fb1 | 511 | |
e28bc5b1 JL |
512 | int |
513 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
514 | unsigned int to_read) | |
42c4dfc2 JL |
515 | { |
516 | struct kvec iov; | |
517 | ||
518 | iov.iov_base = buf; | |
519 | iov.iov_len = to_read; | |
520 | ||
e28bc5b1 | 521 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
522 | } |
523 | ||
98bac62c | 524 | static bool |
fe11e4cc | 525 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 526 | { |
98bac62c PS |
527 | /* |
528 | * The first byte big endian of the length field, | |
529 | * is actually not part of the length but the type | |
530 | * with the most common, zero, as regular data. | |
531 | */ | |
fe11e4cc JL |
532 | switch (type) { |
533 | case RFC1002_SESSION_MESSAGE: | |
534 | /* Regular SMB response */ | |
535 | return true; | |
536 | case RFC1002_SESSION_KEEP_ALIVE: | |
537 | cFYI(1, "RFC 1002 session keep alive"); | |
538 | break; | |
539 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
540 | cFYI(1, "RFC 1002 positive session response"); | |
541 | break; | |
542 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
543 | /* |
544 | * We get this from Windows 98 instead of an error on | |
545 | * SMB negprot response. | |
546 | */ | |
fe11e4cc | 547 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
548 | /* give server a second to clean up */ |
549 | msleep(1000); | |
550 | /* | |
551 | * Always try 445 first on reconnect since we get NACK | |
552 | * on some if we ever connected to port 139 (the NACK | |
553 | * is since we do not begin with RFC1001 session | |
554 | * initialize frame). | |
555 | */ | |
fe11e4cc | 556 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
557 | cifs_reconnect(server); |
558 | wake_up(&server->response_q); | |
fe11e4cc JL |
559 | break; |
560 | default: | |
561 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 562 | cifs_reconnect(server); |
98bac62c PS |
563 | } |
564 | ||
fe11e4cc | 565 | return false; |
98bac62c PS |
566 | } |
567 | ||
ad69bae1 | 568 | static struct mid_q_entry * |
ea1f4502 | 569 | find_mid(struct TCP_Server_Info *server, struct smb_hdr *buf) |
ad69bae1 | 570 | { |
ea1f4502 | 571 | struct mid_q_entry *mid; |
ad69bae1 PS |
572 | |
573 | spin_lock(&GlobalMid_Lock); | |
ea1f4502 JL |
574 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
575 | if (mid->mid == buf->Mid && | |
576 | mid->midState == MID_REQUEST_SUBMITTED && | |
577 | mid->command == buf->Command) { | |
578 | spin_unlock(&GlobalMid_Lock); | |
579 | return mid; | |
ad69bae1 | 580 | } |
ea1f4502 JL |
581 | } |
582 | spin_unlock(&GlobalMid_Lock); | |
583 | return NULL; | |
584 | } | |
585 | ||
e28bc5b1 JL |
586 | void |
587 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 588 | { |
ad69bae1 | 589 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 590 | mid->when_received = jiffies; |
ad69bae1 | 591 | #endif |
ea1f4502 JL |
592 | spin_lock(&GlobalMid_Lock); |
593 | if (!malformed) | |
594 | mid->midState = MID_RESPONSE_RECEIVED; | |
595 | else | |
596 | mid->midState = MID_RESPONSE_MALFORMED; | |
597 | list_del_init(&mid->qhead); | |
ad69bae1 | 598 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 599 | } |
ad69bae1 | 600 | |
c8054ebd JL |
601 | static void |
602 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
603 | struct smb_hdr *buf, int malformed) | |
ea1f4502 | 604 | { |
ffc00e27 JL |
605 | if (malformed == 0 && check2ndT2(buf) > 0) { |
606 | mid->multiRsp = true; | |
ea1f4502 JL |
607 | if (mid->resp_buf) { |
608 | /* merge response - fix up 1st*/ | |
ffc00e27 JL |
609 | malformed = coalesce_t2(buf, mid->resp_buf); |
610 | if (malformed > 0) | |
c8054ebd | 611 | return; |
ffc00e27 | 612 | |
ea1f4502 JL |
613 | /* All parts received or packet is malformed. */ |
614 | mid->multiEnd = true; | |
c8054ebd | 615 | return dequeue_mid(mid, malformed); |
ea1f4502 | 616 | } |
2a37ef94 | 617 | if (!server->large_buf) { |
ea1f4502 JL |
618 | /*FIXME: switch to already allocated largebuf?*/ |
619 | cERROR(1, "1st trans2 resp needs bigbuf"); | |
620 | } else { | |
621 | /* Have first buffer */ | |
622 | mid->resp_buf = buf; | |
623 | mid->largeBuf = true; | |
2a37ef94 | 624 | server->bigbuf = NULL; |
ea1f4502 | 625 | } |
c8054ebd | 626 | return; |
ea1f4502 JL |
627 | } |
628 | mid->resp_buf = buf; | |
2a37ef94 JL |
629 | mid->largeBuf = server->large_buf; |
630 | /* Was previous buf put in mpx struct for multi-rsp? */ | |
631 | if (!mid->multiRsp) { | |
632 | /* smb buffer will be freed by user thread */ | |
633 | if (server->large_buf) | |
634 | server->bigbuf = NULL; | |
635 | else | |
636 | server->smallbuf = NULL; | |
637 | } | |
ffc00e27 | 638 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
639 | } |
640 | ||
762dfd10 PS |
641 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
642 | { | |
643 | int length; | |
644 | ||
645 | /* take it off the list, if it's not already */ | |
646 | spin_lock(&cifs_tcp_ses_lock); | |
647 | list_del_init(&server->tcp_ses_list); | |
648 | spin_unlock(&cifs_tcp_ses_lock); | |
649 | ||
650 | spin_lock(&GlobalMid_Lock); | |
651 | server->tcpStatus = CifsExiting; | |
652 | spin_unlock(&GlobalMid_Lock); | |
653 | wake_up_all(&server->response_q); | |
654 | ||
2d86dbc9 | 655 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 656 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
657 | if (server->credits <= 0) |
658 | server->credits = 1; | |
fc40f9cf | 659 | spin_unlock(&server->req_lock); |
762dfd10 PS |
660 | /* |
661 | * Although there should not be any requests blocked on this queue it | |
662 | * can not hurt to be paranoid and try to wake up requests that may | |
663 | * haven been blocked when more than 50 at time were on the wire to the | |
664 | * same server - they now will see the session is in exit state and get | |
665 | * out of SendReceive. | |
666 | */ | |
667 | wake_up_all(&server->request_q); | |
668 | /* give those requests time to exit */ | |
669 | msleep(125); | |
670 | ||
671 | if (server->ssocket) { | |
672 | sock_release(server->ssocket); | |
673 | server->ssocket = NULL; | |
674 | } | |
675 | ||
676 | if (!list_empty(&server->pending_mid_q)) { | |
677 | struct list_head dispose_list; | |
678 | struct mid_q_entry *mid_entry; | |
679 | struct list_head *tmp, *tmp2; | |
680 | ||
681 | INIT_LIST_HEAD(&dispose_list); | |
682 | spin_lock(&GlobalMid_Lock); | |
683 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
684 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
685 | cFYI(1, "Clearing mid 0x%x", mid_entry->mid); | |
686 | mid_entry->midState = MID_SHUTDOWN; | |
687 | list_move(&mid_entry->qhead, &dispose_list); | |
688 | } | |
689 | spin_unlock(&GlobalMid_Lock); | |
690 | ||
691 | /* now walk dispose list and issue callbacks */ | |
692 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
693 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
694 | cFYI(1, "Callback mid 0x%x", mid_entry->mid); | |
695 | list_del_init(&mid_entry->qhead); | |
696 | mid_entry->callback(mid_entry); | |
697 | } | |
698 | /* 1/8th of sec is more than enough time for them to exit */ | |
699 | msleep(125); | |
700 | } | |
701 | ||
702 | if (!list_empty(&server->pending_mid_q)) { | |
703 | /* | |
704 | * mpx threads have not exited yet give them at least the smb | |
705 | * send timeout time for long ops. | |
706 | * | |
707 | * Due to delays on oplock break requests, we need to wait at | |
708 | * least 45 seconds before giving up on a request getting a | |
709 | * response and going ahead and killing cifsd. | |
710 | */ | |
711 | cFYI(1, "Wait for exit from demultiplex thread"); | |
712 | msleep(46000); | |
713 | /* | |
714 | * If threads still have not exited they are probably never | |
715 | * coming home not much else we can do but free the memory. | |
716 | */ | |
717 | } | |
718 | ||
719 | kfree(server->hostname); | |
1041e3f9 | 720 | kfree(server->iov); |
762dfd10 PS |
721 | kfree(server); |
722 | ||
723 | length = atomic_dec_return(&tcpSesAllocCount); | |
724 | if (length > 0) | |
725 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
726 | GFP_KERNEL); | |
727 | } | |
728 | ||
e9097ab4 JL |
729 | static int |
730 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
731 | { | |
732 | int length; | |
733 | char *buf = server->smallbuf; | |
734 | struct smb_hdr *smb_buffer = (struct smb_hdr *)buf; | |
735 | unsigned int pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); | |
736 | ||
737 | /* make sure this will fit in a large buffer */ | |
738 | if (pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { | |
739 | cERROR(1, "SMB response too long (%u bytes)", | |
740 | pdu_length); | |
741 | cifs_reconnect(server); | |
742 | wake_up(&server->response_q); | |
743 | return -EAGAIN; | |
744 | } | |
745 | ||
746 | /* switch to large buffer if too big for a small one */ | |
747 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
748 | server->large_buf = true; | |
749 | memcpy(server->bigbuf, server->smallbuf, server->total_read); | |
750 | buf = server->bigbuf; | |
751 | smb_buffer = (struct smb_hdr *)buf; | |
752 | } | |
753 | ||
754 | /* now read the rest */ | |
e28bc5b1 | 755 | length = cifs_read_from_socket(server, |
e9097ab4 JL |
756 | buf + sizeof(struct smb_hdr) - 1, |
757 | pdu_length - sizeof(struct smb_hdr) + 1 + 4); | |
758 | if (length < 0) | |
759 | return length; | |
760 | server->total_read += length; | |
761 | ||
762 | dump_smb(smb_buffer, server->total_read); | |
763 | ||
764 | /* | |
765 | * We know that we received enough to get to the MID as we | |
766 | * checked the pdu_length earlier. Now check to see | |
767 | * if the rest of the header is OK. We borrow the length | |
768 | * var for the rest of the loop to avoid a new stack var. | |
769 | * | |
770 | * 48 bytes is enough to display the header and a little bit | |
771 | * into the payload for debugging purposes. | |
772 | */ | |
773 | length = checkSMB(smb_buffer, smb_buffer->Mid, server->total_read); | |
774 | if (length != 0) | |
775 | cifs_dump_mem("Bad SMB: ", buf, | |
776 | min_t(unsigned int, server->total_read, 48)); | |
777 | ||
ff4fa4a2 JL |
778 | if (!mid) |
779 | return length; | |
e9097ab4 | 780 | |
ff4fa4a2 JL |
781 | handle_mid(mid, server, smb_buffer, length); |
782 | return 0; | |
e9097ab4 JL |
783 | } |
784 | ||
1da177e4 | 785 | static int |
7c97c200 | 786 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
787 | { |
788 | int length; | |
7c97c200 | 789 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
790 | unsigned int pdu_length; |
791 | char *buf = NULL; | |
1da177e4 | 792 | struct smb_hdr *smb_buffer = NULL; |
1da177e4 LT |
793 | struct task_struct *task_to_wake = NULL; |
794 | struct mid_q_entry *mid_entry; | |
1da177e4 | 795 | |
1da177e4 | 796 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 797 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
798 | |
799 | length = atomic_inc_return(&tcpSesAllocCount); | |
800 | if (length > 1) | |
26f57364 SF |
801 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
802 | GFP_KERNEL); | |
1da177e4 | 803 | |
83144186 | 804 | set_freezable(); |
469ee614 | 805 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
806 | if (try_to_freeze()) |
807 | continue; | |
b8643e1b | 808 | |
2a37ef94 | 809 | if (!allocate_buffers(server)) |
3d9c2472 | 810 | continue; |
b8643e1b | 811 | |
2a37ef94 JL |
812 | server->large_buf = false; |
813 | smb_buffer = (struct smb_hdr *)server->smallbuf; | |
814 | buf = server->smallbuf; | |
f01d5e14 | 815 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 816 | |
e28bc5b1 | 817 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 818 | if (length < 0) |
1da177e4 | 819 | continue; |
2a37ef94 | 820 | server->total_read = length; |
1da177e4 | 821 | |
98bac62c PS |
822 | /* |
823 | * The right amount was read from socket - 4 bytes, | |
824 | * so we can now interpret the length field. | |
825 | */ | |
be8e3b00 | 826 | pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
70ca734a | 827 | |
fe11e4cc JL |
828 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
829 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 830 | continue; |
e4eb295d | 831 | |
89482a56 JL |
832 | /* make sure we have enough to get to the MID */ |
833 | if (pdu_length < sizeof(struct smb_hdr) - 1 - 4) { | |
834 | cERROR(1, "SMB response too short (%u bytes)", | |
835 | pdu_length); | |
836 | cifs_reconnect(server); | |
837 | wake_up(&server->response_q); | |
838 | continue; | |
e4eb295d | 839 | } |
e7015fb1 | 840 | |
89482a56 | 841 | /* read down to the MID */ |
e28bc5b1 JL |
842 | length = cifs_read_from_socket(server, buf + 4, |
843 | sizeof(struct smb_hdr) - 1 - 4); | |
89482a56 | 844 | if (length < 0) |
e4eb295d | 845 | continue; |
2a37ef94 | 846 | server->total_read += length; |
1da177e4 | 847 | |
c8054ebd | 848 | mid_entry = find_mid(server, smb_buffer); |
50c2f753 | 849 | |
44d22d84 JL |
850 | if (!mid_entry || !mid_entry->receive) |
851 | length = standard_receive3(server, mid_entry); | |
852 | else | |
853 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 854 | |
e9097ab4 | 855 | if (length < 0) |
fe11e4cc | 856 | continue; |
1da177e4 | 857 | |
e9097ab4 | 858 | if (server->large_buf) { |
2a37ef94 | 859 | buf = server->bigbuf; |
e9097ab4 | 860 | smb_buffer = (struct smb_hdr *)buf; |
e4eb295d | 861 | } |
fda35943 | 862 | |
fda35943 | 863 | server->lstrp = jiffies; |
2b84a36c | 864 | if (mid_entry != NULL) { |
2a37ef94 JL |
865 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
866 | mid_entry->callback(mid_entry); | |
ffc00e27 | 867 | } else if (!is_valid_oplock_break(smb_buffer, server)) { |
b6b38f70 | 868 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 869 | "NumMids %d", atomic_read(&midCount)); |
3d9c2472 | 870 | cifs_dump_mem("Received Data is: ", buf, |
70ca734a | 871 | sizeof(struct smb_hdr)); |
3979877e SF |
872 | #ifdef CONFIG_CIFS_DEBUG2 |
873 | cifs_dump_detail(smb_buffer); | |
874 | cifs_dump_mids(server); | |
875 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 876 | |
e4eb295d SF |
877 | } |
878 | } /* end while !EXITING */ | |
879 | ||
fd62cb7e | 880 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
881 | cifs_buf_release(server->bigbuf); |
882 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
883 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 884 | |
b1c8d2b4 | 885 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 886 | clean_demultiplex_info(server); |
50c2f753 | 887 | |
b1c8d2b4 JL |
888 | /* if server->tsk was NULL then wait for a signal before exiting */ |
889 | if (!task_to_wake) { | |
890 | set_current_state(TASK_INTERRUPTIBLE); | |
891 | while (!signal_pending(current)) { | |
892 | schedule(); | |
893 | set_current_state(TASK_INTERRUPTIBLE); | |
894 | } | |
895 | set_current_state(TASK_RUNNING); | |
896 | } | |
897 | ||
0468a2cf | 898 | module_put_and_exit(0); |
1da177e4 LT |
899 | } |
900 | ||
c359cf3c JL |
901 | /* extract the host portion of the UNC string */ |
902 | static char * | |
903 | extract_hostname(const char *unc) | |
904 | { | |
905 | const char *src; | |
906 | char *dst, *delim; | |
907 | unsigned int len; | |
908 | ||
909 | /* skip double chars at beginning of string */ | |
910 | /* BB: check validity of these bytes? */ | |
911 | src = unc + 2; | |
912 | ||
913 | /* delimiter between hostname and sharename is always '\\' now */ | |
914 | delim = strchr(src, '\\'); | |
915 | if (!delim) | |
916 | return ERR_PTR(-EINVAL); | |
917 | ||
918 | len = delim - src; | |
919 | dst = kmalloc((len + 1), GFP_KERNEL); | |
920 | if (dst == NULL) | |
921 | return ERR_PTR(-ENOMEM); | |
922 | ||
923 | memcpy(dst, src, len); | |
924 | dst[len] = '\0'; | |
925 | ||
926 | return dst; | |
927 | } | |
928 | ||
1da177e4 | 929 | static int |
b946845a | 930 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 931 | struct smb_vol *vol) |
1da177e4 | 932 | { |
4906e50b | 933 | char *value, *data, *end; |
957df453 | 934 | char *mountdata_copy = NULL, *options; |
3d3ea8e6 | 935 | int err; |
1da177e4 LT |
936 | unsigned int temp_len, i, j; |
937 | char separator[2]; | |
9b9d6b24 JL |
938 | short int override_uid = -1; |
939 | short int override_gid = -1; | |
940 | bool uid_specified = false; | |
941 | bool gid_specified = false; | |
88463999 | 942 | char *nodename = utsname()->nodename; |
1da177e4 LT |
943 | |
944 | separator[0] = ','; | |
50c2f753 | 945 | separator[1] = 0; |
1da177e4 | 946 | |
88463999 JL |
947 | /* |
948 | * does not have to be perfect mapping since field is | |
949 | * informational, only used for servers that do not support | |
950 | * port 445 and it can be overridden at mount time | |
951 | */ | |
1397f2ee JL |
952 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
953 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
954 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
955 | ||
1397f2ee | 956 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
957 | /* null target name indicates to use *SMBSERVR default called name |
958 | if we end up sending RFC1001 session initialize */ | |
959 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
960 | vol->cred_uid = current_uid(); |
961 | vol->linux_uid = current_uid(); | |
a001e5b5 | 962 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
963 | |
964 | /* default to only allowing write access to owner of the mount */ | |
965 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
966 | |
967 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
968 | /* default is always to request posix paths. */ |
969 | vol->posix_paths = 1; | |
a0c9217f JL |
970 | /* default to using server inode numbers where available */ |
971 | vol->server_ino = 1; | |
ac67055e | 972 | |
6d20e840 SJ |
973 | vol->actimeo = CIFS_DEF_ACTIMEO; |
974 | ||
b946845a SF |
975 | if (!mountdata) |
976 | goto cifs_parse_mount_err; | |
977 | ||
978 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
979 | if (!mountdata_copy) | |
980 | goto cifs_parse_mount_err; | |
1da177e4 | 981 | |
b946845a | 982 | options = mountdata_copy; |
4906e50b | 983 | end = options + strlen(options); |
50c2f753 | 984 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 985 | if (options[4] != 0) { |
1da177e4 LT |
986 | separator[0] = options[4]; |
987 | options += 5; | |
988 | } else { | |
b6b38f70 | 989 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
990 | } |
991 | } | |
3d3ea8e6 SP |
992 | vol->backupuid_specified = false; /* no backup intent for a user */ |
993 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 994 | |
1da177e4 LT |
995 | while ((data = strsep(&options, separator)) != NULL) { |
996 | if (!*data) | |
997 | continue; | |
998 | if ((value = strchr(data, '=')) != NULL) | |
999 | *value++ = '\0'; | |
1000 | ||
50c2f753 SF |
1001 | /* Have to parse this before we parse for "user" */ |
1002 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 1003 | vol->no_xattr = 0; |
50c2f753 | 1004 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
1005 | vol->no_xattr = 1; |
1006 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 1007 | if (!value) { |
1da177e4 LT |
1008 | printk(KERN_WARNING |
1009 | "CIFS: invalid or missing username\n"); | |
b946845a | 1010 | goto cifs_parse_mount_err; |
fb8c4b14 | 1011 | } else if (!*value) { |
4b952a9b SF |
1012 | /* null user, ie anonymous, authentication */ |
1013 | vol->nullauth = 1; | |
1da177e4 | 1014 | } |
8727c8a8 SF |
1015 | if (strnlen(value, MAX_USERNAME_SIZE) < |
1016 | MAX_USERNAME_SIZE) { | |
b946845a SF |
1017 | vol->username = kstrdup(value, GFP_KERNEL); |
1018 | if (!vol->username) { | |
1019 | printk(KERN_WARNING "CIFS: no memory " | |
1020 | "for username\n"); | |
1021 | goto cifs_parse_mount_err; | |
1022 | } | |
1da177e4 LT |
1023 | } else { |
1024 | printk(KERN_WARNING "CIFS: username too long\n"); | |
b946845a | 1025 | goto cifs_parse_mount_err; |
1da177e4 LT |
1026 | } |
1027 | } else if (strnicmp(data, "pass", 4) == 0) { | |
1028 | if (!value) { | |
1029 | vol->password = NULL; | |
1030 | continue; | |
fb8c4b14 | 1031 | } else if (value[0] == 0) { |
1da177e4 LT |
1032 | /* check if string begins with double comma |
1033 | since that would mean the password really | |
1034 | does start with a comma, and would not | |
1035 | indicate an empty string */ | |
fb8c4b14 | 1036 | if (value[1] != separator[0]) { |
1da177e4 LT |
1037 | vol->password = NULL; |
1038 | continue; | |
1039 | } | |
1040 | } | |
1041 | temp_len = strlen(value); | |
1042 | /* removed password length check, NTLM passwords | |
1043 | can be arbitrarily long */ | |
1044 | ||
50c2f753 | 1045 | /* if comma in password, the string will be |
1da177e4 LT |
1046 | prematurely null terminated. Commas in password are |
1047 | specified across the cifs mount interface by a double | |
1048 | comma ie ,, and a comma used as in other cases ie ',' | |
1049 | as a parameter delimiter/separator is single and due | |
1050 | to the strsep above is temporarily zeroed. */ | |
1051 | ||
1052 | /* NB: password legally can have multiple commas and | |
1053 | the only illegal character in a password is null */ | |
1054 | ||
50c2f753 | 1055 | if ((value[temp_len] == 0) && |
4906e50b | 1056 | (value + temp_len < end) && |
09d1db5c | 1057 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
1058 | /* reinsert comma */ |
1059 | value[temp_len] = separator[0]; | |
50c2f753 SF |
1060 | temp_len += 2; /* move after second comma */ |
1061 | while (value[temp_len] != 0) { | |
1da177e4 | 1062 | if (value[temp_len] == separator[0]) { |
50c2f753 | 1063 | if (value[temp_len+1] == |
09d1db5c SF |
1064 | separator[0]) { |
1065 | /* skip second comma */ | |
1066 | temp_len++; | |
50c2f753 | 1067 | } else { |
1da177e4 LT |
1068 | /* single comma indicating start |
1069 | of next parm */ | |
1070 | break; | |
1071 | } | |
1072 | } | |
1073 | temp_len++; | |
1074 | } | |
fb8c4b14 | 1075 | if (value[temp_len] == 0) { |
1da177e4 LT |
1076 | options = NULL; |
1077 | } else { | |
1078 | value[temp_len] = 0; | |
1079 | /* point option to start of next parm */ | |
1080 | options = value + temp_len + 1; | |
1081 | } | |
50c2f753 | 1082 | /* go from value to value + temp_len condensing |
1da177e4 LT |
1083 | double commas to singles. Note that this ends up |
1084 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 1085 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 1086 | if (vol->password == NULL) { |
50c2f753 SF |
1087 | printk(KERN_WARNING "CIFS: no memory " |
1088 | "for password\n"); | |
b946845a | 1089 | goto cifs_parse_mount_err; |
433dc24f | 1090 | } |
50c2f753 | 1091 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 1092 | vol->password[j] = value[i]; |
fb8c4b14 | 1093 | if (value[i] == separator[0] |
09d1db5c | 1094 | && value[i+1] == separator[0]) { |
1da177e4 LT |
1095 | /* skip second comma */ |
1096 | i++; | |
1097 | } | |
1098 | } | |
1099 | vol->password[j] = 0; | |
1100 | } else { | |
e915fc49 | 1101 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 1102 | if (vol->password == NULL) { |
50c2f753 SF |
1103 | printk(KERN_WARNING "CIFS: no memory " |
1104 | "for password\n"); | |
b946845a | 1105 | goto cifs_parse_mount_err; |
433dc24f | 1106 | } |
1da177e4 LT |
1107 | strcpy(vol->password, value); |
1108 | } | |
58f7f68f JL |
1109 | } else if (!strnicmp(data, "ip", 2) || |
1110 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
1111 | if (!value || !*value) { |
1112 | vol->UNCip = NULL; | |
50b64e3b JL |
1113 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
1114 | INET6_ADDRSTRLEN) { | |
b946845a SF |
1115 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
1116 | if (!vol->UNCip) { | |
1117 | printk(KERN_WARNING "CIFS: no memory " | |
1118 | "for UNC IP\n"); | |
1119 | goto cifs_parse_mount_err; | |
1120 | } | |
1da177e4 | 1121 | } else { |
50c2f753 SF |
1122 | printk(KERN_WARNING "CIFS: ip address " |
1123 | "too long\n"); | |
b946845a | 1124 | goto cifs_parse_mount_err; |
1da177e4 | 1125 | } |
50c2f753 SF |
1126 | } else if (strnicmp(data, "sec", 3) == 0) { |
1127 | if (!value || !*value) { | |
b6b38f70 | 1128 | cERROR(1, "no security value specified"); |
50c2f753 SF |
1129 | continue; |
1130 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
1131 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 1132 | CIFSSEC_MUST_SIGN; |
bf820679 | 1133 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
1134 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
1135 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 1136 | cERROR(1, "Krb5 cifs privacy not supported"); |
b946845a | 1137 | goto cifs_parse_mount_err; |
bf820679 | 1138 | } else if (strnicmp(value, "krb5", 4) == 0) { |
750d1151 | 1139 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
1140 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
1141 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1142 | CIFSSEC_MUST_SIGN; | |
1143 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1144 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1145 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1146 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1147 | CIFSSEC_MUST_SIGN; |
bf820679 | 1148 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1149 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1150 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1151 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1152 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1153 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1154 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1155 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1156 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1157 | /* BB is there a better way to do this? */ |
750d1151 | 1158 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1159 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1160 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1161 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1162 | #endif |
bf820679 | 1163 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1164 | vol->nullauth = 1; |
50c2f753 | 1165 | } else { |
b6b38f70 | 1166 | cERROR(1, "bad security option: %s", value); |
b946845a | 1167 | goto cifs_parse_mount_err; |
50c2f753 | 1168 | } |
1cb06d0b SF |
1169 | } else if (strnicmp(data, "vers", 3) == 0) { |
1170 | if (!value || !*value) { | |
1171 | cERROR(1, "no protocol version specified" | |
1172 | " after vers= mount option"); | |
1173 | } else if ((strnicmp(value, "cifs", 4) == 0) || | |
1174 | (strnicmp(value, "1", 1) == 0)) { | |
1175 | /* this is the default */ | |
1176 | continue; | |
1cb06d0b | 1177 | } |
1da177e4 LT |
1178 | } else if ((strnicmp(data, "unc", 3) == 0) |
1179 | || (strnicmp(data, "target", 6) == 0) | |
1180 | || (strnicmp(data, "path", 4) == 0)) { | |
1181 | if (!value || !*value) { | |
50c2f753 SF |
1182 | printk(KERN_WARNING "CIFS: invalid path to " |
1183 | "network resource\n"); | |
b946845a | 1184 | goto cifs_parse_mount_err; |
1da177e4 LT |
1185 | } |
1186 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1187 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1188 | if (vol->UNC == NULL) |
b946845a | 1189 | goto cifs_parse_mount_err; |
50c2f753 | 1190 | strcpy(vol->UNC, value); |
1da177e4 LT |
1191 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1192 | vol->UNC[0] = '\\'; | |
1193 | vol->UNC[1] = '\\'; | |
50c2f753 | 1194 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1195 | printk(KERN_WARNING |
50c2f753 SF |
1196 | "CIFS: UNC Path does not begin " |
1197 | "with // or \\\\ \n"); | |
b946845a | 1198 | goto cifs_parse_mount_err; |
1da177e4 LT |
1199 | } |
1200 | } else { | |
1201 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1202 | goto cifs_parse_mount_err; |
1da177e4 LT |
1203 | } |
1204 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1205 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1206 | if (!value || !*value) { | |
1207 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
b946845a | 1208 | goto cifs_parse_mount_err; |
1da177e4 LT |
1209 | } |
1210 | /* BB are there cases in which a comma can be valid in | |
1211 | a domain name and need special handling? */ | |
3979877e | 1212 | if (strnlen(value, 256) < 256) { |
b946845a SF |
1213 | vol->domainname = kstrdup(value, GFP_KERNEL); |
1214 | if (!vol->domainname) { | |
1215 | printk(KERN_WARNING "CIFS: no memory " | |
1216 | "for domainname\n"); | |
1217 | goto cifs_parse_mount_err; | |
1218 | } | |
b6b38f70 | 1219 | cFYI(1, "Domain name set"); |
1da177e4 | 1220 | } else { |
50c2f753 SF |
1221 | printk(KERN_WARNING "CIFS: domain name too " |
1222 | "long\n"); | |
b946845a | 1223 | goto cifs_parse_mount_err; |
1da177e4 | 1224 | } |
3eb9a889 BG |
1225 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1226 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1227 | ||
1228 | if (!value || !*value) { | |
1229 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1230 | " not specified.\n"); | |
b946845a | 1231 | goto cifs_parse_mount_err; |
3eb9a889 BG |
1232 | } |
1233 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1234 | value, strlen(value)); | |
b235f371 | 1235 | if (i == 0) { |
3eb9a889 BG |
1236 | printk(KERN_WARNING "CIFS: Could not parse" |
1237 | " srcaddr: %s\n", | |
1238 | value); | |
b946845a | 1239 | goto cifs_parse_mount_err; |
3eb9a889 | 1240 | } |
50c2f753 SF |
1241 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1242 | if (!value || !*value) { | |
1243 | printk(KERN_WARNING | |
1244 | "CIFS: invalid path prefix\n"); | |
b946845a | 1245 | goto cifs_parse_mount_err; |
50c2f753 SF |
1246 | } |
1247 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1248 | if (value[0] != '/') |
2fe87f02 | 1249 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1250 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1251 | if (vol->prepath == NULL) | |
b946845a | 1252 | goto cifs_parse_mount_err; |
4523cc30 | 1253 | if (value[0] != '/') { |
2fe87f02 | 1254 | vol->prepath[0] = '/'; |
50c2f753 | 1255 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1256 | } else |
50c2f753 | 1257 | strcpy(vol->prepath, value); |
b6b38f70 | 1258 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1259 | } else { |
1260 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
b946845a | 1261 | goto cifs_parse_mount_err; |
50c2f753 | 1262 | } |
1da177e4 LT |
1263 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1264 | if (!value || !*value) { | |
63135e08 SF |
1265 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1266 | "specified\n"); | |
b946845a | 1267 | goto cifs_parse_mount_err; |
1da177e4 LT |
1268 | } |
1269 | if (strnlen(value, 65) < 65) { | |
b946845a SF |
1270 | if (strnicmp(value, "default", 7)) { |
1271 | vol->iocharset = kstrdup(value, | |
1272 | GFP_KERNEL); | |
1273 | ||
1274 | if (!vol->iocharset) { | |
1275 | printk(KERN_WARNING "CIFS: no " | |
1276 | "memory for" | |
1277 | "charset\n"); | |
1278 | goto cifs_parse_mount_err; | |
1279 | } | |
1280 | } | |
50c2f753 SF |
1281 | /* if iocharset not set then load_nls_default |
1282 | is used by caller */ | |
b6b38f70 | 1283 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1284 | } else { |
63135e08 SF |
1285 | printk(KERN_WARNING "CIFS: iocharset name " |
1286 | "too long.\n"); | |
b946845a | 1287 | goto cifs_parse_mount_err; |
1da177e4 | 1288 | } |
9b9d6b24 JL |
1289 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1290 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1291 | uid_specified = true; | |
bd763319 JL |
1292 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1293 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1294 | } else if (!strnicmp(data, "forceuid", 8)) { |
1295 | override_uid = 1; | |
1296 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1297 | override_uid = 0; | |
1298 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1299 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1300 | gid_specified = true; | |
1301 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1302 | override_gid = 1; | |
1303 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1304 | override_gid = 0; | |
1da177e4 LT |
1305 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1306 | if (value && *value) { | |
1307 | vol->file_mode = | |
1308 | simple_strtoul(value, &value, 0); | |
1309 | } | |
1310 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1311 | if (value && *value) { | |
1312 | vol->dir_mode = | |
1313 | simple_strtoul(value, &value, 0); | |
1314 | } | |
1315 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1316 | if (value && *value) { | |
1317 | vol->dir_mode = | |
1318 | simple_strtoul(value, &value, 0); | |
1319 | } | |
1320 | } else if (strnicmp(data, "port", 4) == 0) { | |
1321 | if (value && *value) { | |
1322 | vol->port = | |
1323 | simple_strtoul(value, &value, 0); | |
1324 | } | |
1325 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1326 | if (value && *value) { | |
1327 | vol->rsize = | |
1328 | simple_strtoul(value, &value, 0); | |
1329 | } | |
1330 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1331 | if (value && *value) { | |
1332 | vol->wsize = | |
1333 | simple_strtoul(value, &value, 0); | |
1334 | } | |
1335 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1336 | if (!value || !*value) { |
b6b38f70 | 1337 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1338 | continue; |
1339 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1340 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1341 | } |
1342 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1343 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1344 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1345 | } else { |
1397f2ee JL |
1346 | memset(vol->source_rfc1001_name, 0x20, |
1347 | RFC1001_NAME_LEN); | |
1348 | /* | |
1349 | * FIXME: are there cases in which a comma can | |
1350 | * be valid in workstation netbios name (and | |
1351 | * need special handling)? | |
1352 | */ | |
1353 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1354 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1355 | if (value[i] == 0) |
1da177e4 | 1356 | break; |
1397f2ee | 1357 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1358 | } |
1359 | /* The string has 16th byte zero still from | |
1360 | set at top of the function */ | |
1397f2ee | 1361 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1362 | printk(KERN_WARNING "CIFS: netbiosname" |
1363 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1364 | } |
1365 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1366 | /* servernetbiosname specified override *SMBSERVER */ | |
1367 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1368 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1369 | } else { |
1370 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1371 | memset(vol->target_rfc1001_name, 0x20, |
1372 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1373 | |
50c2f753 | 1374 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1375 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1376 | valid in this workstation netbios name |
1377 | (and need special handling)? */ | |
a10faeb2 | 1378 | |
50c2f753 SF |
1379 | /* user or mount helper must uppercase |
1380 | the netbiosname */ | |
1381 | if (value[i] == 0) | |
a10faeb2 SF |
1382 | break; |
1383 | else | |
50c2f753 SF |
1384 | vol->target_rfc1001_name[i] = |
1385 | value[i]; | |
a10faeb2 SF |
1386 | } |
1387 | /* The string has 16th byte zero still from | |
1388 | set at top of the function */ | |
1397f2ee | 1389 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1390 | printk(KERN_WARNING "CIFS: server net" |
1391 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1392 | } |
6d20e840 SJ |
1393 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1394 | if (value && *value) { | |
1395 | vol->actimeo = HZ * simple_strtoul(value, | |
1396 | &value, 0); | |
1397 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1398 | cERROR(1, "CIFS: attribute cache" | |
1399 | "timeout too large"); | |
b946845a | 1400 | goto cifs_parse_mount_err; |
6d20e840 SJ |
1401 | } |
1402 | } | |
1da177e4 LT |
1403 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1404 | /* ignore */ | |
1405 | } else if (strnicmp(data, "version", 3) == 0) { | |
1406 | /* ignore */ | |
50c2f753 | 1407 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1408 | /* ignore */ |
c9c7fa00 | 1409 | } else if (strnicmp(data, "rw", 2) == 0 && strlen(data) == 2) { |
71a394fa SF |
1410 | /* ignore */ |
1411 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1412 | /* ignore */ | |
edf1ae40 SF |
1413 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1414 | vol->noblocksnd = 1; | |
1415 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1416 | vol->noautotune = 1; | |
1da177e4 LT |
1417 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1418 | (strnicmp(data, "nosuid", 6) == 0) || | |
1419 | (strnicmp(data, "exec", 4) == 0) || | |
1420 | (strnicmp(data, "noexec", 6) == 0) || | |
1421 | (strnicmp(data, "nodev", 5) == 0) || | |
1422 | (strnicmp(data, "noauto", 6) == 0) || | |
1423 | (strnicmp(data, "dev", 3) == 0)) { | |
1424 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1425 | uses these opts to set flags, and the flags are read |
1426 | by the kernel vfs layer before we get here (ie | |
1427 | before read super) so there is no point trying to | |
1428 | parse these options again and set anything and it | |
1429 | is ok to just ignore them */ | |
1da177e4 | 1430 | continue; |
1da177e4 LT |
1431 | } else if (strnicmp(data, "hard", 4) == 0) { |
1432 | vol->retry = 1; | |
1433 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1434 | vol->retry = 0; | |
1435 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1436 | vol->noperm = 0; | |
1437 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1438 | vol->noperm = 1; | |
6a0b4824 SF |
1439 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1440 | vol->remap = 1; | |
1441 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1442 | vol->remap = 0; | |
50c2f753 SF |
1443 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1444 | vol->sfu_emul = 1; | |
1445 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1446 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1447 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1448 | vol->nodfs = 1; | |
ac67055e JA |
1449 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1450 | vol->posix_paths = 1; | |
1451 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1452 | vol->posix_paths = 0; | |
c18c842b SF |
1453 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1454 | vol->no_linux_ext = 1; | |
1455 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1456 | vol->no_linux_ext = 1; | |
50c2f753 | 1457 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1458 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1459 | vol->nocase = 1; |
f636a348 JL |
1460 | } else if (strnicmp(data, "mand", 4) == 0) { |
1461 | /* ignore */ | |
1462 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1463 | /* ignore */ | |
1464 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1465 | /* ignore */ | |
c46fa8ac SF |
1466 | } else if (strnicmp(data, "brl", 3) == 0) { |
1467 | vol->nobrl = 0; | |
50c2f753 | 1468 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1469 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1470 | vol->nobrl = 1; |
d3485d37 SF |
1471 | /* turn off mandatory locking in mode |
1472 | if remote locking is turned off since the | |
1473 | local vfs will do advisory */ | |
50c2f753 SF |
1474 | if (vol->file_mode == |
1475 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1476 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1477 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1478 | /* will take the shorter form "forcemand" as well */ | |
1479 | /* This mount option will force use of mandatory | |
1480 | (DOS/Windows style) byte range locks, instead of | |
1481 | using posix advisory byte range locks, even if the | |
1482 | Unix extensions are available and posix locks would | |
1483 | be supported otherwise. If Unix extensions are not | |
1484 | negotiated this has no effect since mandatory locks | |
1485 | would be used (mandatory locks is all that those | |
1486 | those servers support) */ | |
1487 | vol->mand_lock = 1; | |
1da177e4 LT |
1488 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1489 | vol->setuids = 1; | |
1490 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1491 | vol->setuids = 0; | |
d0a9c078 JL |
1492 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1493 | vol->dynperm = true; | |
1494 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1495 | vol->dynperm = false; | |
1da177e4 LT |
1496 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1497 | vol->retry = 0; | |
1498 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1499 | vol->retry = 1; | |
1500 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1501 | vol->intr = 0; | |
1502 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1503 | vol->intr = 1; | |
be652445 SF |
1504 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1505 | vol->nostrictsync = 1; | |
1506 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1507 | vol->nostrictsync = 0; | |
50c2f753 | 1508 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1509 | vol->server_ino = 1; |
50c2f753 | 1510 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1511 | vol->server_ino = 0; |
c9c7fa00 | 1512 | } else if (strnicmp(data, "rwpidforward", 12) == 0) { |
d4ffff1f | 1513 | vol->rwpidforward = 1; |
50c2f753 | 1514 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1515 | vol->cifs_acl = 1; |
1516 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1517 | vol->cifs_acl = 0; | |
50c2f753 | 1518 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1519 | vol->no_psx_acl = 0; |
50c2f753 | 1520 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1521 | vol->no_psx_acl = 1; |
84210e91 SF |
1522 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1523 | vol->local_lease = 1; | |
50c2f753 | 1524 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1525 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1526 | } else if (strnicmp(data, "seal", 4) == 0) { |
1527 | /* we do not do the following in secFlags because seal | |
1528 | is a per tree connection (mount) not a per socket | |
1529 | or per-smb connection option in the protocol */ | |
1530 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1531 | vol->seal = 1; | |
50c2f753 | 1532 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1533 | vol->direct_io = 1; |
50c2f753 | 1534 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1535 | vol->direct_io = 1; |
d39454ff PS |
1536 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1537 | vol->strict_io = 1; | |
1da177e4 | 1538 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1539 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1540 | "supported. Instead set " | |
1541 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1542 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d | 1543 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1544 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1545 | "kernel config option set"); |
b946845a | 1546 | goto cifs_parse_mount_err; |
607a569d | 1547 | #endif |
fa1df75d | 1548 | vol->fsc = true; |
736a3320 SM |
1549 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1550 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1551 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1552 | vol->multiuser = true; | |
3d3ea8e6 SP |
1553 | } else if (!strnicmp(data, "backupuid", 9) && value && *value) { |
1554 | err = kstrtouint(value, 0, &vol->backupuid); | |
1555 | if (err < 0) { | |
1556 | cERROR(1, "%s: Invalid backupuid value", | |
1557 | __func__); | |
1558 | goto cifs_parse_mount_err; | |
1559 | } | |
1560 | vol->backupuid_specified = true; | |
1561 | } else if (!strnicmp(data, "backupgid", 9) && value && *value) { | |
1562 | err = kstrtouint(value, 0, &vol->backupgid); | |
1563 | if (err < 0) { | |
1564 | cERROR(1, "%s: Invalid backupgid value", | |
1565 | __func__); | |
1566 | goto cifs_parse_mount_err; | |
1567 | } | |
1568 | vol->backupgid_specified = true; | |
1da177e4 | 1569 | } else |
50c2f753 SF |
1570 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1571 | data); | |
1da177e4 LT |
1572 | } |
1573 | if (vol->UNC == NULL) { | |
4523cc30 | 1574 | if (devname == NULL) { |
50c2f753 SF |
1575 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1576 | "target\n"); | |
b946845a | 1577 | goto cifs_parse_mount_err; |
1da177e4 LT |
1578 | } |
1579 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1580 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1581 | if (vol->UNC == NULL) |
b946845a | 1582 | goto cifs_parse_mount_err; |
50c2f753 | 1583 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1584 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1585 | vol->UNC[0] = '\\'; | |
1586 | vol->UNC[1] = '\\'; | |
1587 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1588 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1589 | "begin with // or \\\\ \n"); | |
b946845a | 1590 | goto cifs_parse_mount_err; |
1da177e4 | 1591 | } |
7c5e628f IM |
1592 | value = strpbrk(vol->UNC+2, "/\\"); |
1593 | if (value) | |
1594 | *value = '\\'; | |
1da177e4 LT |
1595 | } else { |
1596 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1597 | goto cifs_parse_mount_err; |
1da177e4 LT |
1598 | } |
1599 | } | |
0eb8a132 | 1600 | |
8a8798a5 JL |
1601 | #ifndef CONFIG_KEYS |
1602 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1603 | if (vol->multiuser) { | |
1604 | cERROR(1, "Multiuser mounts require kernels with " | |
1605 | "CONFIG_KEYS enabled."); | |
b946845a | 1606 | goto cifs_parse_mount_err; |
0eb8a132 | 1607 | } |
8a8798a5 | 1608 | #endif |
0eb8a132 | 1609 | |
fb8c4b14 | 1610 | if (vol->UNCip == NULL) |
1da177e4 LT |
1611 | vol->UNCip = &vol->UNC[2]; |
1612 | ||
9b9d6b24 JL |
1613 | if (uid_specified) |
1614 | vol->override_uid = override_uid; | |
1615 | else if (override_uid == 1) | |
1616 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1617 | "specified with no uid= option.\n"); | |
1618 | ||
1619 | if (gid_specified) | |
1620 | vol->override_gid = override_gid; | |
1621 | else if (override_gid == 1) | |
1622 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1623 | "specified with no gid= option.\n"); | |
1624 | ||
b946845a | 1625 | kfree(mountdata_copy); |
1da177e4 | 1626 | return 0; |
b946845a SF |
1627 | |
1628 | cifs_parse_mount_err: | |
1629 | kfree(mountdata_copy); | |
1630 | return 1; | |
1da177e4 LT |
1631 | } |
1632 | ||
3eb9a889 BG |
1633 | /** Returns true if srcaddr isn't specified and rhs isn't |
1634 | * specified, or if srcaddr is specified and | |
1635 | * matches the IP address of the rhs argument. | |
1636 | */ | |
1637 | static bool | |
1638 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1639 | { | |
1640 | switch (srcaddr->sa_family) { | |
1641 | case AF_UNSPEC: | |
1642 | return (rhs->sa_family == AF_UNSPEC); | |
1643 | case AF_INET: { | |
1644 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1645 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1646 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1647 | } | |
1648 | case AF_INET6: { | |
1649 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1650 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1651 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1652 | } | |
1653 | default: | |
1654 | WARN_ON(1); | |
1655 | return false; /* don't expect to be here */ | |
1656 | } | |
1657 | } | |
1658 | ||
4b886136 PS |
1659 | /* |
1660 | * If no port is specified in addr structure, we try to match with 445 port | |
1661 | * and if it fails - with 139 ports. It should be called only if address | |
1662 | * families of server and addr are equal. | |
1663 | */ | |
1664 | static bool | |
1665 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1666 | { | |
6da97910 | 1667 | __be16 port, *sport; |
4b886136 PS |
1668 | |
1669 | switch (addr->sa_family) { | |
1670 | case AF_INET: | |
1671 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1672 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1673 | break; | |
1674 | case AF_INET6: | |
1675 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1676 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1677 | break; | |
1678 | default: | |
1679 | WARN_ON(1); | |
1680 | return false; | |
1681 | } | |
1682 | ||
1683 | if (!port) { | |
1684 | port = htons(CIFS_PORT); | |
1685 | if (port == *sport) | |
1686 | return true; | |
1687 | ||
1688 | port = htons(RFC1001_PORT); | |
1689 | } | |
1690 | ||
1691 | return port == *sport; | |
1692 | } | |
3eb9a889 | 1693 | |
4515148e | 1694 | static bool |
3eb9a889 BG |
1695 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1696 | struct sockaddr *srcaddr) | |
4515148e | 1697 | { |
4515148e | 1698 | switch (addr->sa_family) { |
a9f1b85e PS |
1699 | case AF_INET: { |
1700 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1701 | struct sockaddr_in *srv_addr4 = | |
1702 | (struct sockaddr_in *)&server->dstaddr; | |
1703 | ||
1704 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1705 | return false; |
4515148e | 1706 | break; |
a9f1b85e PS |
1707 | } |
1708 | case AF_INET6: { | |
1709 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1710 | struct sockaddr_in6 *srv_addr6 = | |
1711 | (struct sockaddr_in6 *)&server->dstaddr; | |
1712 | ||
4515148e | 1713 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1714 | &srv_addr6->sin6_addr)) |
4515148e | 1715 | return false; |
a9f1b85e | 1716 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1717 | return false; |
4515148e JL |
1718 | break; |
1719 | } | |
a9f1b85e PS |
1720 | default: |
1721 | WARN_ON(1); | |
1722 | return false; /* don't expect to be here */ | |
1723 | } | |
4515148e | 1724 | |
3eb9a889 BG |
1725 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1726 | return false; | |
1727 | ||
4515148e JL |
1728 | return true; |
1729 | } | |
1730 | ||
daf5b0b6 JL |
1731 | static bool |
1732 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1733 | { | |
1734 | unsigned int secFlags; | |
1735 | ||
1736 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1737 | secFlags = vol->secFlg; | |
1738 | else | |
1739 | secFlags = global_secflags | vol->secFlg; | |
1740 | ||
1741 | switch (server->secType) { | |
1742 | case LANMAN: | |
1743 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1744 | return false; | |
1745 | break; | |
1746 | case NTLMv2: | |
1747 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1748 | return false; | |
1749 | break; | |
1750 | case NTLM: | |
1751 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1752 | return false; | |
1753 | break; | |
1754 | case Kerberos: | |
1755 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1756 | return false; | |
1757 | break; | |
1758 | case RawNTLMSSP: | |
1759 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1760 | return false; | |
1761 | break; | |
1762 | default: | |
1763 | /* shouldn't happen */ | |
1764 | return false; | |
1765 | } | |
1766 | ||
25985edc | 1767 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 1768 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 1769 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
1770 | return false; |
1771 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 1772 | (server->sec_mode & |
daf5b0b6 JL |
1773 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
1774 | return false; | |
1775 | ||
1776 | return true; | |
1777 | } | |
1778 | ||
37bb04e5 PS |
1779 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1780 | struct smb_vol *vol) | |
1781 | { | |
1782 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
1783 | return 0; | |
1784 | ||
1785 | if (!match_address(server, addr, | |
1786 | (struct sockaddr *)&vol->srcaddr)) | |
1787 | return 0; | |
1788 | ||
1789 | if (!match_port(server, addr)) | |
1790 | return 0; | |
1791 | ||
1792 | if (!match_security(server, vol)) | |
1793 | return 0; | |
1794 | ||
1795 | return 1; | |
1796 | } | |
1797 | ||
e7ddee90 | 1798 | static struct TCP_Server_Info * |
daf5b0b6 | 1799 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1800 | { |
e7ddee90 | 1801 | struct TCP_Server_Info *server; |
e7ddee90 | 1802 | |
3f9bcca7 | 1803 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1804 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 1805 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
1806 | continue; |
1807 | ||
e7ddee90 | 1808 | ++server->srv_count; |
3f9bcca7 | 1809 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1810 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1811 | return server; |
1da177e4 | 1812 | } |
3f9bcca7 | 1813 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1814 | return NULL; |
1815 | } | |
1b20d672 | 1816 | |
14fbf50d | 1817 | static void |
e7ddee90 | 1818 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1819 | { |
e7ddee90 | 1820 | struct task_struct *task; |
1b20d672 | 1821 | |
3f9bcca7 | 1822 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1823 | if (--server->srv_count > 0) { |
3f9bcca7 | 1824 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1825 | return; |
1da177e4 | 1826 | } |
1b20d672 | 1827 | |
f1d0c998 RL |
1828 | put_net(cifs_net_ns(server)); |
1829 | ||
e7ddee90 | 1830 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1831 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1832 | |
c74093b6 JL |
1833 | cancel_delayed_work_sync(&server->echo); |
1834 | ||
e7ddee90 JL |
1835 | spin_lock(&GlobalMid_Lock); |
1836 | server->tcpStatus = CifsExiting; | |
1837 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1838 | |
d2b91521 | 1839 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1840 | cifs_fscache_release_client_cookie(server); |
1841 | ||
21e73393 SP |
1842 | kfree(server->session_key.response); |
1843 | server->session_key.response = NULL; | |
1844 | server->session_key.len = 0; | |
1845 | ||
e7ddee90 JL |
1846 | task = xchg(&server->tsk, NULL); |
1847 | if (task) | |
1848 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1849 | } |
1850 | ||
63c038c2 JL |
1851 | static struct TCP_Server_Info * |
1852 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1853 | { | |
1854 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1855 | struct sockaddr_storage addr; |
63c038c2 JL |
1856 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1857 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1858 | int rc; | |
1859 | ||
a9ac49d3 | 1860 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1861 | |
b6b38f70 | 1862 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1863 | |
1e68b2b2 | 1864 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1865 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1866 | volume_info->UNCip, | |
67b7626a | 1867 | strlen(volume_info->UNCip), |
50d97160 | 1868 | volume_info->port); |
1e68b2b2 | 1869 | if (!rc) { |
63c038c2 JL |
1870 | /* we failed translating address */ |
1871 | rc = -EINVAL; | |
1872 | goto out_err; | |
1873 | } | |
63c038c2 JL |
1874 | } else if (volume_info->UNCip) { |
1875 | /* BB using ip addr as tcp_ses name to connect to the | |
1876 | DFS root below */ | |
b6b38f70 | 1877 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1878 | rc = -EINVAL; |
1879 | goto out_err; | |
1880 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1881 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1882 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1883 | rc = -EINVAL; |
1884 | goto out_err; | |
1885 | } | |
1886 | ||
1887 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1888 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1889 | if (tcp_ses) |
1890 | return tcp_ses; | |
1891 | ||
1892 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1893 | if (!tcp_ses) { | |
1894 | rc = -ENOMEM; | |
1895 | goto out_err; | |
1896 | } | |
1897 | ||
d2b91521 SP |
1898 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1899 | if (rc) { | |
1900 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1901 | goto out_err; | |
1902 | } | |
1903 | ||
f1d0c998 | 1904 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1905 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1906 | if (IS_ERR(tcp_ses->hostname)) { | |
1907 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1908 | goto out_err_crypto_release; |
63c038c2 JL |
1909 | } |
1910 | ||
1911 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1912 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1913 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 1914 | tcp_ses->in_flight = 0; |
2d86dbc9 | 1915 | tcp_ses->credits = 1; |
63c038c2 JL |
1916 | init_waitqueue_head(&tcp_ses->response_q); |
1917 | init_waitqueue_head(&tcp_ses->request_q); | |
1918 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1919 | mutex_init(&tcp_ses->srv_mutex); | |
1920 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1921 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1922 | memcpy(tcp_ses->server_RFC1001_name, | |
1923 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1924 | tcp_ses->session_estab = false; |
63c038c2 | 1925 | tcp_ses->sequence_number = 0; |
fda35943 | 1926 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1927 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1928 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1929 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1930 | |
1931 | /* | |
1932 | * at this point we are the only ones with the pointer | |
1933 | * to the struct since the kernel thread not created yet | |
1934 | * no need to spinlock this init of tcpStatus or srv_count | |
1935 | */ | |
1936 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1937 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1938 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1939 | ++tcp_ses->srv_count; |
1940 | ||
a9ac49d3 | 1941 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1942 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1943 | /* BB should we allow ipv6 on port 139? */ |
1944 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1945 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1946 | sizeof(struct sockaddr_in6)); | |
1947 | } else | |
1948 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1949 | sizeof(struct sockaddr_in)); | |
1950 | ||
1951 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1952 | if (rc < 0) { |
b6b38f70 | 1953 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1954 | goto out_err_crypto_release; |
63c038c2 JL |
1955 | } |
1956 | ||
1957 | /* | |
1958 | * since we're in a cifs function already, we know that | |
1959 | * this will succeed. No need for try_module_get(). | |
1960 | */ | |
1961 | __module_get(THIS_MODULE); | |
7c97c200 | 1962 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
1963 | tcp_ses, "cifsd"); |
1964 | if (IS_ERR(tcp_ses->tsk)) { | |
1965 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1966 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1967 | module_put(THIS_MODULE); |
f7c5445a | 1968 | goto out_err_crypto_release; |
63c038c2 | 1969 | } |
fd88ce93 | 1970 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1971 | |
1972 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1973 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1974 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1975 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1976 | |
488f1d2d SJ |
1977 | cifs_fscache_get_client_cookie(tcp_ses); |
1978 | ||
c74093b6 JL |
1979 | /* queue echo request delayed work */ |
1980 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1981 | ||
63c038c2 JL |
1982 | return tcp_ses; |
1983 | ||
f7c5445a | 1984 | out_err_crypto_release: |
d2b91521 SP |
1985 | cifs_crypto_shash_release(tcp_ses); |
1986 | ||
f1d0c998 RL |
1987 | put_net(cifs_net_ns(tcp_ses)); |
1988 | ||
63c038c2 JL |
1989 | out_err: |
1990 | if (tcp_ses) { | |
8347a5cd SF |
1991 | if (!IS_ERR(tcp_ses->hostname)) |
1992 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1993 | if (tcp_ses->ssocket) |
1994 | sock_release(tcp_ses->ssocket); | |
1995 | kfree(tcp_ses); | |
1996 | } | |
1997 | return ERR_PTR(rc); | |
1998 | } | |
1999 | ||
96daf2b0 | 2000 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2001 | { |
2002 | switch (ses->server->secType) { | |
2003 | case Kerberos: | |
2004 | if (vol->cred_uid != ses->cred_uid) | |
2005 | return 0; | |
2006 | break; | |
2007 | default: | |
04febabc JL |
2008 | /* NULL username means anonymous session */ |
2009 | if (ses->user_name == NULL) { | |
2010 | if (!vol->nullauth) | |
2011 | return 0; | |
2012 | break; | |
2013 | } | |
2014 | ||
37bb04e5 | 2015 | /* anything else takes username/password */ |
04febabc JL |
2016 | if (strncmp(ses->user_name, |
2017 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2018 | MAX_USERNAME_SIZE)) |
2019 | return 0; | |
2020 | if (strlen(vol->username) != 0 && | |
2021 | ses->password != NULL && | |
2022 | strncmp(ses->password, | |
2023 | vol->password ? vol->password : "", | |
2024 | MAX_PASSWORD_SIZE)) | |
2025 | return 0; | |
2026 | } | |
2027 | return 1; | |
2028 | } | |
2029 | ||
96daf2b0 | 2030 | static struct cifs_ses * |
4ff67b72 | 2031 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2032 | { |
96daf2b0 | 2033 | struct cifs_ses *ses; |
dea570e0 | 2034 | |
3f9bcca7 | 2035 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2036 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2037 | if (!match_session(ses, vol)) |
2038 | continue; | |
14fbf50d | 2039 | ++ses->ses_count; |
3f9bcca7 | 2040 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2041 | return ses; |
2042 | } | |
3f9bcca7 | 2043 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2044 | return NULL; |
2045 | } | |
dea570e0 | 2046 | |
14fbf50d | 2047 | static void |
96daf2b0 | 2048 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d JL |
2049 | { |
2050 | int xid; | |
2051 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 2052 | |
36988c76 | 2053 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 2054 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2055 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2056 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2057 | return; |
2058 | } | |
dea570e0 | 2059 | |
14fbf50d | 2060 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2061 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2062 | |
14fbf50d JL |
2063 | if (ses->status == CifsGood) { |
2064 | xid = GetXid(); | |
2065 | CIFSSMBLogoff(xid, ses); | |
2066 | _FreeXid(xid); | |
2067 | } | |
2068 | sesInfoFree(ses); | |
2069 | cifs_put_tcp_session(server); | |
2070 | } | |
dea570e0 | 2071 | |
8a8798a5 JL |
2072 | #ifdef CONFIG_KEYS |
2073 | ||
2074 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2075 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2076 | ||
2077 | /* Populate username and pw fields from keyring if possible */ | |
2078 | static int | |
2079 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2080 | { | |
2081 | int rc = 0; | |
2082 | char *desc, *delim, *payload; | |
2083 | ssize_t len; | |
2084 | struct key *key; | |
2085 | struct TCP_Server_Info *server = ses->server; | |
2086 | struct sockaddr_in *sa; | |
2087 | struct sockaddr_in6 *sa6; | |
2088 | struct user_key_payload *upayload; | |
2089 | ||
2090 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2091 | if (!desc) | |
2092 | return -ENOMEM; | |
2093 | ||
2094 | /* try to find an address key first */ | |
2095 | switch (server->dstaddr.ss_family) { | |
2096 | case AF_INET: | |
2097 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2098 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2099 | break; | |
2100 | case AF_INET6: | |
2101 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2102 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2103 | break; | |
2104 | default: | |
2105 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2106 | rc = -EINVAL; | |
2107 | goto out_err; | |
2108 | } | |
2109 | ||
2110 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2111 | key = request_key(&key_type_logon, desc, ""); | |
2112 | if (IS_ERR(key)) { | |
2113 | if (!ses->domainName) { | |
2114 | cFYI(1, "domainName is NULL"); | |
2115 | rc = PTR_ERR(key); | |
2116 | goto out_err; | |
2117 | } | |
2118 | ||
2119 | /* didn't work, try to find a domain key */ | |
2120 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2121 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2122 | key = request_key(&key_type_logon, desc, ""); | |
2123 | if (IS_ERR(key)) { | |
2124 | rc = PTR_ERR(key); | |
2125 | goto out_err; | |
2126 | } | |
2127 | } | |
2128 | ||
2129 | down_read(&key->sem); | |
2130 | upayload = key->payload.data; | |
2131 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2132 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2133 | goto out_key_put; |
2134 | } | |
2135 | ||
2136 | /* find first : in payload */ | |
2137 | payload = (char *)upayload->data; | |
2138 | delim = strnchr(payload, upayload->datalen, ':'); | |
2139 | cFYI(1, "payload=%s", payload); | |
2140 | if (!delim) { | |
2141 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2142 | upayload->datalen); | |
2143 | rc = -EINVAL; | |
2144 | goto out_key_put; | |
2145 | } | |
2146 | ||
2147 | len = delim - payload; | |
2148 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2149 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2150 | rc = -EINVAL; |
2151 | goto out_key_put; | |
2152 | } | |
2153 | ||
2154 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2155 | if (!vol->username) { | |
000f9bb8 | 2156 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2157 | rc = -ENOMEM; |
2158 | goto out_key_put; | |
2159 | } | |
2160 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2161 | ||
2162 | len = key->datalen - (len + 1); | |
2163 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2164 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2165 | rc = -EINVAL; |
2166 | kfree(vol->username); | |
2167 | vol->username = NULL; | |
2168 | goto out_key_put; | |
2169 | } | |
2170 | ||
2171 | ++delim; | |
2172 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2173 | if (!vol->password) { | |
000f9bb8 | 2174 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2175 | rc = -ENOMEM; |
2176 | kfree(vol->username); | |
2177 | vol->username = NULL; | |
2178 | goto out_key_put; | |
2179 | } | |
2180 | ||
2181 | out_key_put: | |
2182 | up_read(&key->sem); | |
2183 | key_put(key); | |
2184 | out_err: | |
2185 | kfree(desc); | |
2186 | cFYI(1, "%s: returning %d", __func__, rc); | |
2187 | return rc; | |
2188 | } | |
2189 | #else /* ! CONFIG_KEYS */ | |
2190 | static inline int | |
2191 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2192 | struct cifs_ses *ses __attribute__((unused))) | |
2193 | { | |
2194 | return -ENOSYS; | |
2195 | } | |
2196 | #endif /* CONFIG_KEYS */ | |
2197 | ||
d9b94201 SF |
2198 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2199 | ||
96daf2b0 | 2200 | static struct cifs_ses * |
36988c76 JL |
2201 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2202 | { | |
2203 | int rc = -ENOMEM, xid; | |
96daf2b0 | 2204 | struct cifs_ses *ses; |
a9f1b85e PS |
2205 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2206 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
2207 | |
2208 | xid = GetXid(); | |
2209 | ||
4ff67b72 | 2210 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2211 | if (ses) { |
2212 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2213 | ||
36988c76 | 2214 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2215 | rc = cifs_negotiate_protocol(xid, ses); |
2216 | if (rc) { | |
2217 | mutex_unlock(&ses->session_mutex); | |
2218 | /* problem -- put our ses reference */ | |
2219 | cifs_put_smb_ses(ses); | |
2220 | FreeXid(xid); | |
2221 | return ERR_PTR(rc); | |
2222 | } | |
36988c76 JL |
2223 | if (ses->need_reconnect) { |
2224 | cFYI(1, "Session needs reconnect"); | |
2225 | rc = cifs_setup_session(xid, ses, | |
2226 | volume_info->local_nls); | |
2227 | if (rc) { | |
2228 | mutex_unlock(&ses->session_mutex); | |
2229 | /* problem -- put our reference */ | |
2230 | cifs_put_smb_ses(ses); | |
2231 | FreeXid(xid); | |
2232 | return ERR_PTR(rc); | |
2233 | } | |
2234 | } | |
2235 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2236 | |
2237 | /* existing SMB ses has a server reference already */ | |
2238 | cifs_put_tcp_session(server); | |
36988c76 JL |
2239 | FreeXid(xid); |
2240 | return ses; | |
2241 | } | |
2242 | ||
2243 | cFYI(1, "Existing smb sess not found"); | |
2244 | ses = sesInfoAlloc(); | |
2245 | if (ses == NULL) | |
2246 | goto get_ses_fail; | |
2247 | ||
2248 | /* new SMB session uses our server ref */ | |
2249 | ses->server = server; | |
a9f1b85e PS |
2250 | if (server->dstaddr.ss_family == AF_INET6) |
2251 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2252 | else |
a9f1b85e | 2253 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2254 | |
8727c8a8 SF |
2255 | if (volume_info->username) { |
2256 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2257 | if (!ses->user_name) | |
2258 | goto get_ses_fail; | |
2259 | } | |
36988c76 JL |
2260 | |
2261 | /* volume_info->password freed at unmount */ | |
2262 | if (volume_info->password) { | |
2263 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2264 | if (!ses->password) | |
2265 | goto get_ses_fail; | |
2266 | } | |
2267 | if (volume_info->domainname) { | |
d3686d54 SP |
2268 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2269 | if (!ses->domainName) | |
2270 | goto get_ses_fail; | |
36988c76 | 2271 | } |
3e4b3e1f | 2272 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2273 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2274 | |
2275 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2276 | supported for many years, time to update default security mechanism */ | |
2277 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2278 | warned_on_ntlm = true; | |
2279 | cERROR(1, "default security mechanism requested. The default " | |
2280 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2281 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2282 | } |
36988c76 JL |
2283 | ses->overrideSecFlg = volume_info->secFlg; |
2284 | ||
2285 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2286 | rc = cifs_negotiate_protocol(xid, ses); |
2287 | if (!rc) | |
2288 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2289 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2290 | if (rc) |
36988c76 JL |
2291 | goto get_ses_fail; |
2292 | ||
2293 | /* success, put it on the list */ | |
3f9bcca7 | 2294 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2295 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2296 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2297 | |
2298 | FreeXid(xid); | |
2299 | return ses; | |
2300 | ||
2301 | get_ses_fail: | |
2302 | sesInfoFree(ses); | |
2303 | FreeXid(xid); | |
2304 | return ERR_PTR(rc); | |
2305 | } | |
2306 | ||
96daf2b0 | 2307 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2308 | { |
2309 | if (tcon->tidStatus == CifsExiting) | |
2310 | return 0; | |
2311 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2312 | return 0; | |
2313 | return 1; | |
2314 | } | |
2315 | ||
96daf2b0 SF |
2316 | static struct cifs_tcon * |
2317 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2318 | { |
2319 | struct list_head *tmp; | |
96daf2b0 | 2320 | struct cifs_tcon *tcon; |
f1987b44 | 2321 | |
3f9bcca7 | 2322 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2323 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2324 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2325 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2326 | continue; |
f1987b44 | 2327 | ++tcon->tc_count; |
3f9bcca7 | 2328 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2329 | return tcon; |
1da177e4 | 2330 | } |
3f9bcca7 | 2331 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2332 | return NULL; |
2333 | } | |
2334 | ||
f1987b44 | 2335 | static void |
96daf2b0 | 2336 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 JL |
2337 | { |
2338 | int xid; | |
96daf2b0 | 2339 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2340 | |
d00c28de | 2341 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2342 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2343 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2344 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2345 | return; |
2346 | } | |
2347 | ||
2348 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2349 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2350 | |
2351 | xid = GetXid(); | |
2352 | CIFSSMBTDis(xid, tcon); | |
2353 | _FreeXid(xid); | |
2354 | ||
d03382ce | 2355 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2356 | tconInfoFree(tcon); |
f1987b44 JL |
2357 | cifs_put_smb_ses(ses); |
2358 | } | |
2359 | ||
96daf2b0 SF |
2360 | static struct cifs_tcon * |
2361 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2362 | { |
2363 | int rc, xid; | |
96daf2b0 | 2364 | struct cifs_tcon *tcon; |
d00c28de JL |
2365 | |
2366 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2367 | if (tcon) { | |
2368 | cFYI(1, "Found match on UNC path"); | |
2369 | /* existing tcon already has a reference */ | |
2370 | cifs_put_smb_ses(ses); | |
2371 | if (tcon->seal != volume_info->seal) | |
2372 | cERROR(1, "transport encryption setting " | |
2373 | "conflicts with existing tid"); | |
2374 | return tcon; | |
2375 | } | |
2376 | ||
2377 | tcon = tconInfoAlloc(); | |
2378 | if (tcon == NULL) { | |
2379 | rc = -ENOMEM; | |
2380 | goto out_fail; | |
2381 | } | |
2382 | ||
2383 | tcon->ses = ses; | |
2384 | if (volume_info->password) { | |
2385 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2386 | if (!tcon->password) { | |
2387 | rc = -ENOMEM; | |
2388 | goto out_fail; | |
2389 | } | |
2390 | } | |
2391 | ||
2392 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2393 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2394 | cERROR(1, "Missing share name"); | |
2395 | rc = -ENODEV; | |
2396 | goto out_fail; | |
2397 | } | |
2398 | ||
2399 | /* BB Do we need to wrap session_mutex around | |
2400 | * this TCon call and Unix SetFS as | |
2401 | * we do on SessSetup and reconnect? */ | |
2402 | xid = GetXid(); | |
2403 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2404 | FreeXid(xid); | |
2405 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2406 | if (rc) | |
2407 | goto out_fail; | |
2408 | ||
2409 | if (volume_info->nodfs) { | |
2410 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2411 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2412 | } | |
2413 | tcon->seal = volume_info->seal; | |
2414 | /* we can have only one retry value for a connection | |
2415 | to a share so for resources mounted more than once | |
2416 | to the same server share the last value passed in | |
2417 | for the retry flag is used */ | |
2418 | tcon->retry = volume_info->retry; | |
2419 | tcon->nocase = volume_info->nocase; | |
2420 | tcon->local_lease = volume_info->local_lease; | |
2421 | ||
3f9bcca7 | 2422 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2423 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2424 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2425 | |
d03382ce SJ |
2426 | cifs_fscache_get_super_cookie(tcon); |
2427 | ||
d00c28de JL |
2428 | return tcon; |
2429 | ||
2430 | out_fail: | |
2431 | tconInfoFree(tcon); | |
2432 | return ERR_PTR(rc); | |
2433 | } | |
2434 | ||
9d002df4 JL |
2435 | void |
2436 | cifs_put_tlink(struct tcon_link *tlink) | |
2437 | { | |
2438 | if (!tlink || IS_ERR(tlink)) | |
2439 | return; | |
2440 | ||
2441 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2442 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2443 | tlink->tl_time = jiffies; | |
2444 | return; | |
2445 | } | |
2446 | ||
2447 | if (!IS_ERR(tlink_tcon(tlink))) | |
2448 | cifs_put_tcon(tlink_tcon(tlink)); | |
2449 | kfree(tlink); | |
2450 | return; | |
2451 | } | |
d00c28de | 2452 | |
25c7f41e | 2453 | static inline struct tcon_link * |
cd51875d PS |
2454 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2455 | { | |
2456 | return cifs_sb->master_tlink; | |
2457 | } | |
25c7f41e PS |
2458 | |
2459 | static int | |
2460 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2461 | { | |
2462 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2463 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2464 | ||
2465 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2466 | return 0; | |
2467 | ||
2468 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2469 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2470 | return 0; | |
2471 | ||
25c7f41e | 2472 | /* |
5eba8ab3 JL |
2473 | * We want to share sb only if we don't specify an r/wsize or |
2474 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2475 | */ |
2476 | if (new->wsize && new->wsize < old->wsize) | |
2477 | return 0; | |
2478 | ||
5eba8ab3 JL |
2479 | if (new->rsize && new->rsize < old->rsize) |
2480 | return 0; | |
2481 | ||
25c7f41e PS |
2482 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2483 | return 0; | |
2484 | ||
2485 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2486 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2487 | return 0; | |
2488 | ||
2489 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2490 | return 0; | |
2491 | ||
2492 | if (old->actimeo != new->actimeo) | |
2493 | return 0; | |
2494 | ||
2495 | return 1; | |
2496 | } | |
2497 | ||
2498 | int | |
2499 | cifs_match_super(struct super_block *sb, void *data) | |
2500 | { | |
2501 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2502 | struct smb_vol *volume_info; | |
2503 | struct cifs_sb_info *cifs_sb; | |
2504 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2505 | struct cifs_ses *ses; |
2506 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2507 | struct tcon_link *tlink; |
2508 | struct sockaddr_storage addr; | |
2509 | int rc = 0; | |
2510 | ||
2511 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2512 | ||
2513 | spin_lock(&cifs_tcp_ses_lock); | |
2514 | cifs_sb = CIFS_SB(sb); | |
2515 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2516 | if (IS_ERR(tlink)) { | |
2517 | spin_unlock(&cifs_tcp_ses_lock); | |
2518 | return rc; | |
2519 | } | |
2520 | tcon = tlink_tcon(tlink); | |
2521 | ses = tcon->ses; | |
2522 | tcp_srv = ses->server; | |
2523 | ||
2524 | volume_info = mnt_data->vol; | |
2525 | ||
2526 | if (!volume_info->UNCip || !volume_info->UNC) | |
2527 | goto out; | |
2528 | ||
2529 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2530 | volume_info->UNCip, | |
2531 | strlen(volume_info->UNCip), | |
2532 | volume_info->port); | |
2533 | if (!rc) | |
2534 | goto out; | |
2535 | ||
2536 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2537 | !match_session(ses, volume_info) || | |
2538 | !match_tcon(tcon, volume_info->UNC)) { | |
2539 | rc = 0; | |
2540 | goto out; | |
2541 | } | |
2542 | ||
2543 | rc = compare_mount_options(sb, mnt_data); | |
2544 | out: | |
25c7f41e | 2545 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2546 | cifs_put_tlink(tlink); |
25c7f41e PS |
2547 | return rc; |
2548 | } | |
2549 | ||
1da177e4 | 2550 | int |
96daf2b0 | 2551 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
50c2f753 | 2552 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
366781c1 | 2553 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2554 | { |
2555 | char *temp_unc; | |
2556 | int rc = 0; | |
2557 | ||
2558 | *pnum_referrals = 0; | |
366781c1 | 2559 | *preferrals = NULL; |
1da177e4 LT |
2560 | |
2561 | if (pSesInfo->ipc_tid == 0) { | |
2562 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2563 | strnlen(pSesInfo->serverName, |
2564 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2565 | + 1 + 4 /* slash IPC$ */ + 2, |
2566 | GFP_KERNEL); | |
2567 | if (temp_unc == NULL) | |
2568 | return -ENOMEM; | |
2569 | temp_unc[0] = '\\'; | |
2570 | temp_unc[1] = '\\'; | |
2571 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2572 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2573 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2574 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2575 | kfree(temp_unc); |
2576 | } | |
2577 | if (rc == 0) | |
c2cf07d5 | 2578 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2579 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2580 | /* BB map targetUNCs to dfs_info3 structures, here or |
2581 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2582 | |
2583 | return rc; | |
2584 | } | |
2585 | ||
09e50d55 JL |
2586 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2587 | static struct lock_class_key cifs_key[2]; | |
2588 | static struct lock_class_key cifs_slock_key[2]; | |
2589 | ||
2590 | static inline void | |
2591 | cifs_reclassify_socket4(struct socket *sock) | |
2592 | { | |
2593 | struct sock *sk = sock->sk; | |
2594 | BUG_ON(sock_owned_by_user(sk)); | |
2595 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2596 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2597 | } | |
2598 | ||
2599 | static inline void | |
2600 | cifs_reclassify_socket6(struct socket *sock) | |
2601 | { | |
2602 | struct sock *sk = sock->sk; | |
2603 | BUG_ON(sock_owned_by_user(sk)); | |
2604 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2605 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2606 | } | |
2607 | #else | |
2608 | static inline void | |
2609 | cifs_reclassify_socket4(struct socket *sock) | |
2610 | { | |
2611 | } | |
2612 | ||
2613 | static inline void | |
2614 | cifs_reclassify_socket6(struct socket *sock) | |
2615 | { | |
2616 | } | |
2617 | #endif | |
2618 | ||
1da177e4 | 2619 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2620 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2621 | { |
50c2f753 | 2622 | unsigned int i, j; |
1da177e4 | 2623 | |
50c2f753 | 2624 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2625 | /* mask a nibble at a time and encode */ |
2626 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2627 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2628 | j += 2; |
1da177e4 LT |
2629 | } |
2630 | ||
2631 | } | |
2632 | ||
3eb9a889 BG |
2633 | static int |
2634 | bind_socket(struct TCP_Server_Info *server) | |
2635 | { | |
2636 | int rc = 0; | |
2637 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2638 | /* Bind to the specified local IP address */ | |
2639 | struct socket *socket = server->ssocket; | |
2640 | rc = socket->ops->bind(socket, | |
2641 | (struct sockaddr *) &server->srcaddr, | |
2642 | sizeof(server->srcaddr)); | |
2643 | if (rc < 0) { | |
2644 | struct sockaddr_in *saddr4; | |
2645 | struct sockaddr_in6 *saddr6; | |
2646 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2647 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2648 | if (saddr6->sin6_family == AF_INET6) | |
2649 | cERROR(1, "cifs: " | |
2650 | "Failed to bind to: %pI6c, error: %d\n", | |
2651 | &saddr6->sin6_addr, rc); | |
2652 | else | |
2653 | cERROR(1, "cifs: " | |
2654 | "Failed to bind to: %pI4, error: %d\n", | |
2655 | &saddr4->sin_addr.s_addr, rc); | |
2656 | } | |
2657 | } | |
2658 | return rc; | |
2659 | } | |
1da177e4 LT |
2660 | |
2661 | static int | |
a9f1b85e | 2662 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2663 | { |
2664 | int rc = 0; | |
a9f1b85e PS |
2665 | /* |
2666 | * some servers require RFC1001 sessinit before sending | |
2667 | * negprot - BB check reconnection in case where second | |
2668 | * sessinit is sent but no second negprot | |
2669 | */ | |
2670 | struct rfc1002_session_packet *ses_init_buf; | |
2671 | struct smb_hdr *smb_buf; | |
2672 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2673 | GFP_KERNEL); | |
2674 | if (ses_init_buf) { | |
2675 | ses_init_buf->trailer.session_req.called_len = 32; | |
2676 | ||
2677 | if (server->server_RFC1001_name && | |
2678 | server->server_RFC1001_name[0] != 0) | |
2679 | rfc1002mangle(ses_init_buf->trailer. | |
2680 | session_req.called_name, | |
2681 | server->server_RFC1001_name, | |
2682 | RFC1001_NAME_LEN_WITH_NULL); | |
2683 | else | |
2684 | rfc1002mangle(ses_init_buf->trailer. | |
2685 | session_req.called_name, | |
2686 | DEFAULT_CIFS_CALLED_NAME, | |
2687 | RFC1001_NAME_LEN_WITH_NULL); | |
2688 | ||
2689 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2690 | ||
2691 | /* | |
2692 | * calling name ends in null (byte 16) from old smb | |
2693 | * convention. | |
2694 | */ | |
2695 | if (server->workstation_RFC1001_name && | |
2696 | server->workstation_RFC1001_name[0] != 0) | |
2697 | rfc1002mangle(ses_init_buf->trailer. | |
2698 | session_req.calling_name, | |
2699 | server->workstation_RFC1001_name, | |
2700 | RFC1001_NAME_LEN_WITH_NULL); | |
2701 | else | |
2702 | rfc1002mangle(ses_init_buf->trailer. | |
2703 | session_req.calling_name, | |
2704 | "LINUX_CIFS_CLNT", | |
2705 | RFC1001_NAME_LEN_WITH_NULL); | |
2706 | ||
2707 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2708 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2709 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2710 | ||
2711 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2712 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2713 | rc = smb_send(server, smb_buf, 0x44); |
2714 | kfree(ses_init_buf); | |
2715 | /* | |
2716 | * RFC1001 layer in at least one server | |
2717 | * requires very short break before negprot | |
2718 | * presumably because not expecting negprot | |
2719 | * to follow so fast. This is a simple | |
2720 | * solution that works without | |
2721 | * complicating the code and causes no | |
2722 | * significant slowing down on mount | |
2723 | * for everyone else | |
2724 | */ | |
2725 | usleep_range(1000, 2000); | |
2726 | } | |
2727 | /* | |
2728 | * else the negprot may still work without this | |
2729 | * even though malloc failed | |
2730 | */ | |
2731 | ||
2732 | return rc; | |
2733 | } | |
2734 | ||
2735 | static int | |
2736 | generic_ip_connect(struct TCP_Server_Info *server) | |
2737 | { | |
2738 | int rc = 0; | |
6da97910 | 2739 | __be16 sport; |
a9f1b85e | 2740 | int slen, sfamily; |
bcf4b106 | 2741 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2742 | struct sockaddr *saddr; |
2743 | ||
2744 | saddr = (struct sockaddr *) &server->dstaddr; | |
2745 | ||
2746 | if (server->dstaddr.ss_family == AF_INET6) { | |
2747 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2748 | slen = sizeof(struct sockaddr_in6); | |
2749 | sfamily = AF_INET6; | |
2750 | } else { | |
2751 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2752 | slen = sizeof(struct sockaddr_in); | |
2753 | sfamily = AF_INET; | |
2754 | } | |
1da177e4 | 2755 | |
bcf4b106 | 2756 | if (socket == NULL) { |
f1d0c998 RL |
2757 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2758 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2759 | if (rc < 0) { |
b6b38f70 | 2760 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2761 | server->ssocket = NULL; |
1da177e4 | 2762 | return rc; |
1da177e4 | 2763 | } |
bcf4b106 JL |
2764 | |
2765 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2766 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2767 | server->ssocket = socket; |
2768 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2769 | if (sfamily == AF_INET6) |
2770 | cifs_reclassify_socket6(socket); | |
2771 | else | |
2772 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2773 | } |
2774 | ||
3eb9a889 BG |
2775 | rc = bind_socket(server); |
2776 | if (rc < 0) | |
2777 | return rc; | |
2778 | ||
bcf4b106 JL |
2779 | /* |
2780 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2781 | * the default. sock_setsockopt not used because it expects |
2782 | * user space buffer | |
bcf4b106 JL |
2783 | */ |
2784 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2785 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2786 | |
b387eaeb | 2787 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2788 | if (server->noautotune) { |
2789 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2790 | socket->sk->sk_sndbuf = 200 * 1024; | |
2791 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2792 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2793 | } |
1da177e4 | 2794 | |
6a5fa236 | 2795 | if (server->tcp_nodelay) { |
a9f1b85e | 2796 | int val = 1; |
6a5fa236 SF |
2797 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2798 | (char *)&val, sizeof(val)); | |
2799 | if (rc) | |
b6b38f70 | 2800 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2801 | } |
2802 | ||
b6b38f70 | 2803 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2804 | socket->sk->sk_sndbuf, |
b6b38f70 | 2805 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2806 | |
ee1b3ea9 JL |
2807 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2808 | if (rc < 0) { | |
2809 | cFYI(1, "Error %d connecting to server", rc); | |
2810 | sock_release(socket); | |
2811 | server->ssocket = NULL; | |
2812 | return rc; | |
2813 | } | |
2814 | ||
a9f1b85e PS |
2815 | if (sport == htons(RFC1001_PORT)) |
2816 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2817 | |
1da177e4 LT |
2818 | return rc; |
2819 | } | |
2820 | ||
2821 | static int | |
a9f1b85e | 2822 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2823 | { |
6da97910 | 2824 | __be16 *sport; |
a9f1b85e PS |
2825 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2826 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2827 | |
a9f1b85e PS |
2828 | if (server->dstaddr.ss_family == AF_INET6) |
2829 | sport = &addr6->sin6_port; | |
2830 | else | |
2831 | sport = &addr->sin_port; | |
1da177e4 | 2832 | |
a9f1b85e PS |
2833 | if (*sport == 0) { |
2834 | int rc; | |
1da177e4 | 2835 | |
a9f1b85e PS |
2836 | /* try with 445 port at first */ |
2837 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2838 | |
a9f1b85e | 2839 | rc = generic_ip_connect(server); |
1da177e4 | 2840 | if (rc >= 0) |
a9f1b85e | 2841 | return rc; |
6a5fa236 | 2842 | |
a9f1b85e PS |
2843 | /* if it failed, try with 139 port */ |
2844 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2845 | } |
2846 | ||
a9f1b85e | 2847 | return generic_ip_connect(server); |
1da177e4 LT |
2848 | } |
2849 | ||
96daf2b0 | 2850 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
2c6292ae | 2851 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
2852 | { |
2853 | /* if we are reconnecting then should we check to see if | |
2854 | * any requested capabilities changed locally e.g. via | |
2855 | * remount but we can not do much about it here | |
2856 | * if they have (even if we could detect it by the following) | |
2857 | * Perhaps we could add a backpointer to array of sb from tcon | |
2858 | * or if we change to make all sb to same share the same | |
2859 | * sb as NFS - then we only have one backpointer to sb. | |
2860 | * What if we wanted to mount the server share twice once with | |
2861 | * and once without posixacls or posix paths? */ | |
2862 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2863 | |
c18c842b SF |
2864 | if (vol_info && vol_info->no_linux_ext) { |
2865 | tcon->fsUnixInfo.Capability = 0; | |
2866 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2867 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2868 | return; |
2869 | } else if (vol_info) | |
2870 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2871 | ||
2872 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2873 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2874 | return; |
2875 | } | |
50c2f753 | 2876 | |
fb8c4b14 | 2877 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2878 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 2879 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
2880 | /* check for reconnect case in which we do not |
2881 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2882 | if (vol_info == NULL) { |
50c2f753 | 2883 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2884 | originally at mount time */ |
2885 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2886 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2887 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2888 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2889 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2890 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2891 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2892 | cERROR(1, "possible reconnect error"); |
2893 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2894 | } |
8af18971 | 2895 | } |
50c2f753 | 2896 | |
6848b733 SF |
2897 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
2898 | cERROR(1, "per-share encryption not supported yet"); | |
2899 | ||
8af18971 | 2900 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2901 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2902 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2903 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2904 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
2905 | if (cifs_sb) |
2906 | cifs_sb->mnt_cifs_flags |= | |
2907 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
2908 | } |
2909 | ||
75865f8c | 2910 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2911 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2912 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2913 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
2914 | if (cifs_sb) |
2915 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
2916 | CIFS_MOUNT_POSIX_PATHS; |
2917 | } | |
50c2f753 | 2918 | |
b6b38f70 | 2919 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2920 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2921 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2922 | cFYI(1, "FCNTL cap"); |
75865f8c | 2923 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2924 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2925 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2926 | cFYI(1, "POSIX path cap"); |
75865f8c | 2927 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2928 | cFYI(1, "XATTR cap"); |
75865f8c | 2929 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2930 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2931 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2932 | cFYI(1, "very large read cap"); |
75865f8c | 2933 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2934 | cFYI(1, "very large write cap"); |
6848b733 SF |
2935 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
2936 | cFYI(1, "transport encryption cap"); | |
2937 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
2938 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
2939 | #endif /* CIFS_DEBUG2 */ |
2940 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2941 | if (vol_info == NULL) { |
b6b38f70 | 2942 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2943 | } else |
b6b38f70 | 2944 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2945 | "with the server failed. Consider " |
2946 | "mounting with the Unix Extensions\n" | |
2947 | "disabled, if problems are found, " | |
2948 | "by specifying the nounix mount " | |
b6b38f70 | 2949 | "option."); |
5a44b319 | 2950 | |
8af18971 SF |
2951 | } |
2952 | } | |
2953 | } | |
2954 | ||
724d9f1c PS |
2955 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
2956 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2957 | { |
2de970ff JL |
2958 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2959 | ||
2ced6f69 AV |
2960 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
2961 | cifs_sb->tlink_tree = RB_ROOT; | |
2962 | ||
25c7f41e | 2963 | /* |
5eba8ab3 JL |
2964 | * Temporarily set r/wsize for matching superblock. If we end up using |
2965 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 2966 | */ |
5eba8ab3 | 2967 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
2968 | cifs_sb->wsize = pvolume_info->wsize; |
2969 | ||
3b795210 SF |
2970 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
2971 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3d3ea8e6 SP |
2972 | if (pvolume_info->backupuid_specified) |
2973 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; | |
2974 | if (pvolume_info->backupgid_specified) | |
2975 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; | |
3b795210 SF |
2976 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; |
2977 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 2978 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 2979 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 2980 | |
6d20e840 | 2981 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 2982 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 2983 | |
3b795210 SF |
2984 | if (pvolume_info->noperm) |
2985 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2986 | if (pvolume_info->setuids) | |
2987 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2988 | if (pvolume_info->server_ino) | |
2989 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2990 | if (pvolume_info->remap) | |
2991 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2992 | if (pvolume_info->no_xattr) | |
2993 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2994 | if (pvolume_info->sfu_emul) | |
2995 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2996 | if (pvolume_info->nobrl) | |
2997 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2998 | if (pvolume_info->nostrictsync) |
4717bed6 | 2999 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3000 | if (pvolume_info->mand_lock) |
3001 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3002 | if (pvolume_info->rwpidforward) |
3003 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3004 | if (pvolume_info->cifs_acl) |
3005 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3d3ea8e6 SP |
3006 | if (pvolume_info->backupuid_specified) |
3007 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; | |
3008 | if (pvolume_info->backupgid_specified) | |
3009 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; | |
3b795210 SF |
3010 | if (pvolume_info->override_uid) |
3011 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3012 | if (pvolume_info->override_gid) | |
3013 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3014 | if (pvolume_info->dynperm) | |
3015 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3016 | if (pvolume_info->fsc) |
3017 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3018 | if (pvolume_info->multiuser) |
3019 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3020 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3021 | if (pvolume_info->strict_io) |
3022 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3023 | if (pvolume_info->direct_io) { |
b6b38f70 | 3024 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3025 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3026 | } | |
736a3320 SM |
3027 | if (pvolume_info->mfsymlinks) { |
3028 | if (pvolume_info->sfu_emul) { | |
3029 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3030 | "mount option is used"); | |
3031 | } else { | |
3032 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3033 | } | |
3034 | } | |
3b795210 SF |
3035 | |
3036 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3037 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3038 | "mount option supported"); | |
b1c8d2b4 JL |
3039 | } |
3040 | ||
f7910cbd | 3041 | /* |
5eba8ab3 JL |
3042 | * When the server supports very large reads and writes via POSIX extensions, |
3043 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not | |
3044 | * including the RFC1001 length. | |
f7910cbd JL |
3045 | * |
3046 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
3047 | * writeback however as we have to allocate an array of pointers for the |
3048 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
5eba8ab3 JL |
3049 | * |
3050 | * For reads, there is a similar problem as we need to allocate an array | |
3051 | * of kvecs to handle the receive, though that should only need to be done | |
3052 | * once. | |
f7910cbd | 3053 | */ |
1190f6a0 | 3054 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3055 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3056 | |
3057 | /* | |
5eba8ab3 JL |
3058 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
3059 | * of 2^17-1 minus the size of the call header. That allows for a read or | |
3060 | * write up to the maximum size described by RFC1002. | |
f7910cbd | 3061 | */ |
94443f43 | 3062 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3063 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3064 | |
3065 | /* | |
3066 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
3067 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
3068 | * a single wsize request with a single call. | |
3069 | */ | |
5eba8ab3 JL |
3070 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
3071 | ||
3072 | /* | |
ce91acb3 JL |
3073 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
3074 | * those values when posix extensions aren't in force. In actuality here, we | |
3075 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem | |
3076 | * to be ok with the extra byte even though Windows doesn't send writes that | |
3077 | * are that large. | |
3078 | * | |
3079 | * Citation: | |
3080 | * | |
3081 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx | |
5eba8ab3 JL |
3082 | */ |
3083 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) | |
ce91acb3 | 3084 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
f7910cbd JL |
3085 | |
3086 | static unsigned int | |
96daf2b0 | 3087 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
3088 | { |
3089 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3090 | struct TCP_Server_Info *server = tcon->ses->server; | |
ce91acb3 JL |
3091 | unsigned int wsize; |
3092 | ||
3093 | /* start with specified wsize, or default */ | |
3094 | if (pvolume_info->wsize) | |
3095 | wsize = pvolume_info->wsize; | |
3096 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
3097 | wsize = CIFS_DEFAULT_IOSIZE; | |
3098 | else | |
3099 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
f7910cbd JL |
3100 | |
3101 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
3102 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 3103 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 3104 | |
1190f6a0 JL |
3105 | /* |
3106 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
3107 | * Limit it to max buffer offered by the server, minus the size of the | |
3108 | * WRITEX header, not including the 4 byte RFC1001 length. | |
3109 | */ | |
3110 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
3111 | (!(server->capabilities & CAP_UNIX) && | |
3112 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
3113 | wsize = min_t(unsigned int, wsize, | |
3114 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd JL |
3115 | |
3116 | /* hard limit of CIFS_MAX_WSIZE */ | |
3117 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
3118 | ||
3119 | return wsize; | |
3120 | } | |
3121 | ||
5eba8ab3 JL |
3122 | static unsigned int |
3123 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) | |
3124 | { | |
3125 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3126 | struct TCP_Server_Info *server = tcon->ses->server; | |
3127 | unsigned int rsize, defsize; | |
3128 | ||
3129 | /* | |
3130 | * Set default value... | |
3131 | * | |
3132 | * HACK alert! Ancient servers have very small buffers. Even though | |
3133 | * MS-CIFS indicates that servers are only limited by the client's | |
3134 | * bufsize for reads, testing against win98se shows that it throws | |
3135 | * INVALID_PARAMETER errors if you try to request too large a read. | |
3136 | * | |
3137 | * If the server advertises a MaxBufferSize of less than one page, | |
3138 | * assume that it also can't satisfy reads larger than that either. | |
3139 | * | |
3140 | * FIXME: Is there a better heuristic for this? | |
3141 | */ | |
3142 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
3143 | defsize = CIFS_DEFAULT_IOSIZE; | |
3144 | else if (server->capabilities & CAP_LARGE_READ_X) | |
3145 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
3146 | else if (server->maxBuf >= PAGE_CACHE_SIZE) | |
3147 | defsize = CIFSMaxBufSize; | |
3148 | else | |
3149 | defsize = server->maxBuf - sizeof(READ_RSP); | |
3150 | ||
3151 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; | |
3152 | ||
3153 | /* | |
3154 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
3155 | * the client's MaxBufferSize. | |
3156 | */ | |
3157 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
3158 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
3159 | ||
3160 | /* hard limit of CIFS_MAX_RSIZE */ | |
3161 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
3162 | ||
3163 | return rsize; | |
3164 | } | |
3165 | ||
e4cce94c | 3166 | static int |
96daf2b0 | 3167 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
3168 | struct cifs_sb_info *cifs_sb, const char *full_path) |
3169 | { | |
3170 | int rc; | |
e4cce94c IM |
3171 | FILE_ALL_INFO *pfile_info; |
3172 | ||
e4cce94c IM |
3173 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
3174 | if (pfile_info == NULL) | |
3175 | return -ENOMEM; | |
3176 | ||
3177 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
3178 | 0 /* not legacy */, cifs_sb->local_nls, | |
3179 | cifs_sb->mnt_cifs_flags & | |
3180 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
3181 | |
3182 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
3183 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
3184 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
3185 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
3186 | kfree(pfile_info); |
3187 | return rc; | |
3188 | } | |
3189 | ||
b9bce2e9 JL |
3190 | static void |
3191 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3192 | { |
b946845a | 3193 | kfree(volume_info->username); |
1bfe73c2 | 3194 | kzfree(volume_info->password); |
13589c43 SF |
3195 | if (volume_info->UNCip != volume_info->UNC + 2) |
3196 | kfree(volume_info->UNCip); | |
95c75454 | 3197 | kfree(volume_info->UNC); |
b946845a SF |
3198 | kfree(volume_info->domainname); |
3199 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3200 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3201 | } |
3202 | ||
3203 | void | |
3204 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3205 | { | |
3206 | if (!volume_info) | |
3207 | return; | |
3208 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3209 | kfree(volume_info); |
1bfe73c2 IM |
3210 | } |
3211 | ||
b9bce2e9 | 3212 | |
2d6d589d | 3213 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3214 | /* build_path_to_root returns full path to root when |
3215 | * we do not have an exiting connection (tcon) */ | |
3216 | static char * | |
b2a0fa15 | 3217 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3218 | const struct cifs_sb_info *cifs_sb) |
3219 | { | |
b2a0fa15 JL |
3220 | char *full_path, *pos; |
3221 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3222 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3223 | |
b2a0fa15 | 3224 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3225 | if (full_path == NULL) |
3226 | return ERR_PTR(-ENOMEM); | |
3227 | ||
b2a0fa15 JL |
3228 | strncpy(full_path, vol->UNC, unc_len); |
3229 | pos = full_path + unc_len; | |
3230 | ||
3231 | if (pplen) { | |
3232 | strncpy(pos, vol->prepath, pplen); | |
3233 | pos += pplen; | |
3234 | } | |
3235 | ||
3236 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3237 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3238 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3239 | return full_path; |
3240 | } | |
dd613945 SF |
3241 | |
3242 | /* | |
3243 | * Perform a dfs referral query for a share and (optionally) prefix | |
3244 | * | |
046462ab SF |
3245 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3246 | * to a string containing updated options for the submount. Otherwise it | |
3247 | * will be left untouched. | |
dd613945 SF |
3248 | * |
3249 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3250 | * determine whether there were referrals. | |
3251 | */ | |
3252 | static int | |
96daf2b0 | 3253 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
dd613945 | 3254 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3255 | int check_prefix) |
dd613945 SF |
3256 | { |
3257 | int rc; | |
3258 | unsigned int num_referrals = 0; | |
3259 | struct dfs_info3_param *referrals = NULL; | |
3260 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3261 | ||
3262 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3263 | if (IS_ERR(full_path)) | |
3264 | return PTR_ERR(full_path); | |
3265 | ||
3266 | /* For DFS paths, skip the first '\' of the UNC */ | |
3267 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3268 | ||
3269 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
3270 | &num_referrals, &referrals, | |
3271 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3272 | ||
3273 | if (!rc && num_referrals > 0) { | |
3274 | char *fake_devname = NULL; | |
3275 | ||
3276 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3277 | full_path + 1, referrals, | |
3278 | &fake_devname); | |
3279 | ||
3280 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3281 | |
dd613945 SF |
3282 | if (IS_ERR(mdata)) { |
3283 | rc = PTR_ERR(mdata); | |
3284 | mdata = NULL; | |
b9bce2e9 JL |
3285 | } else { |
3286 | cleanup_volume_info_contents(volume_info); | |
3287 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3288 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3289 | fake_devname); | |
dd613945 | 3290 | } |
b9bce2e9 JL |
3291 | kfree(fake_devname); |
3292 | kfree(cifs_sb->mountdata); | |
046462ab | 3293 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3294 | } |
3295 | kfree(full_path); | |
3296 | return rc; | |
3297 | } | |
2d6d589d | 3298 | #endif |
1bfe73c2 | 3299 | |
04db79b0 JL |
3300 | static int |
3301 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3302 | const char *devname) | |
1da177e4 | 3303 | { |
724d9f1c | 3304 | int rc = 0; |
1da177e4 | 3305 | |
04db79b0 JL |
3306 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3307 | return -EINVAL; | |
1da177e4 | 3308 | |
7586b765 | 3309 | if (volume_info->nullauth) { |
04febabc JL |
3310 | cFYI(1, "Anonymous login"); |
3311 | kfree(volume_info->username); | |
3312 | volume_info->username = NULL; | |
7586b765 | 3313 | } else if (volume_info->username) { |
1da177e4 | 3314 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3315 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3316 | } else { |
bf820679 | 3317 | cifserror("No username specified"); |
50c2f753 SF |
3318 | /* In userspace mount helper we can get user name from alternate |
3319 | locations such as env variables and files on disk */ | |
04db79b0 | 3320 | return -EINVAL; |
1da177e4 LT |
3321 | } |
3322 | ||
1da177e4 | 3323 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3324 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3325 | /* load_nls_default cannot return null */ |
3326 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3327 | } else { |
a5fc4ce0 JL |
3328 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3329 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3330 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3331 | volume_info->iocharset); | |
04db79b0 | 3332 | return -ELIBACC; |
1da177e4 LT |
3333 | } |
3334 | } | |
724d9f1c | 3335 | |
724d9f1c PS |
3336 | return rc; |
3337 | } | |
3338 | ||
04db79b0 JL |
3339 | struct smb_vol * |
3340 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3341 | { | |
3342 | int rc; | |
3343 | struct smb_vol *volume_info; | |
3344 | ||
3345 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3346 | if (!volume_info) | |
3347 | return ERR_PTR(-ENOMEM); | |
3348 | ||
3349 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3350 | if (rc) { | |
3351 | cifs_cleanup_volume_info(volume_info); | |
3352 | volume_info = ERR_PTR(rc); | |
3353 | } | |
3354 | ||
3355 | return volume_info; | |
3356 | } | |
3357 | ||
66bfaadc JL |
3358 | /* make sure ra_pages is a multiple of rsize */ |
3359 | static inline unsigned int | |
3360 | cifs_ra_pages(struct cifs_sb_info *cifs_sb) | |
3361 | { | |
3362 | unsigned int reads; | |
3363 | unsigned int rsize_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; | |
3364 | ||
3365 | if (rsize_pages >= default_backing_dev_info.ra_pages) | |
3366 | return default_backing_dev_info.ra_pages; | |
3367 | else if (rsize_pages == 0) | |
3368 | return rsize_pages; | |
3369 | ||
3370 | reads = default_backing_dev_info.ra_pages / rsize_pages; | |
3371 | return reads * rsize_pages; | |
3372 | } | |
3373 | ||
724d9f1c | 3374 | int |
2c6292ae | 3375 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3376 | { |
1daaae8f | 3377 | int rc; |
724d9f1c | 3378 | int xid; |
96daf2b0 SF |
3379 | struct cifs_ses *pSesInfo; |
3380 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3381 | struct TCP_Server_Info *srvTcp; |
3382 | char *full_path; | |
3383 | struct tcon_link *tlink; | |
3384 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3385 | int referral_walks_count = 0; | |
20547490 | 3386 | #endif |
dd854466 AV |
3387 | |
3388 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3389 | if (rc) | |
3390 | return rc; | |
3391 | ||
20547490 | 3392 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3393 | try_mount_again: |
3394 | /* cleanup activities if we're chasing a referral */ | |
3395 | if (referral_walks_count) { | |
3396 | if (tcon) | |
3397 | cifs_put_tcon(tcon); | |
3398 | else if (pSesInfo) | |
3399 | cifs_put_smb_ses(pSesInfo); | |
3400 | ||
724d9f1c PS |
3401 | FreeXid(xid); |
3402 | } | |
3403 | #endif | |
1daaae8f | 3404 | rc = 0; |
724d9f1c PS |
3405 | tcon = NULL; |
3406 | pSesInfo = NULL; | |
3407 | srvTcp = NULL; | |
3408 | full_path = NULL; | |
3409 | tlink = NULL; | |
3410 | ||
3411 | xid = GetXid(); | |
1da177e4 | 3412 | |
63c038c2 | 3413 | /* get a reference to a tcp session */ |
7586b765 | 3414 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3415 | if (IS_ERR(srvTcp)) { |
3416 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3417 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3418 | goto out; |
1da177e4 LT |
3419 | } |
3420 | ||
36988c76 JL |
3421 | /* get a reference to a SMB session */ |
3422 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3423 | if (IS_ERR(pSesInfo)) { | |
3424 | rc = PTR_ERR(pSesInfo); | |
3425 | pSesInfo = NULL; | |
3426 | goto mount_fail_check; | |
1da177e4 | 3427 | } |
50c2f753 | 3428 | |
d00c28de JL |
3429 | /* search for existing tcon to this server share */ |
3430 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3431 | if (IS_ERR(tcon)) { | |
3432 | rc = PTR_ERR(tcon); | |
3433 | tcon = NULL; | |
1bfe73c2 | 3434 | goto remote_path_check; |
d00c28de | 3435 | } |
1bfe73c2 | 3436 | |
d82c2df5 | 3437 | /* tell server which Unix caps we support */ |
6848b733 | 3438 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3439 | /* reset of caps checks mount to see if unix extensions |
3440 | disabled for just this mount */ | |
2c6292ae | 3441 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3442 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3443 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3444 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3445 | rc = -EACCES; | |
3446 | goto mount_fail_check; | |
3447 | } | |
3448 | } else | |
d82c2df5 | 3449 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3450 | |
6848b733 SF |
3451 | /* do not care if following two calls succeed - informational */ |
3452 | if (!tcon->ipc) { | |
3453 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3454 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3455 | } | |
3456 | ||
f7910cbd | 3457 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
5eba8ab3 | 3458 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
f7910cbd | 3459 | |
66bfaadc JL |
3460 | /* tune readahead according to rsize */ |
3461 | cifs_sb->bdi.ra_pages = cifs_ra_pages(cifs_sb); | |
f7910cbd | 3462 | |
1bfe73c2 | 3463 | remote_path_check: |
c1508ca2 SF |
3464 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3465 | /* | |
3466 | * Perform an unconditional check for whether there are DFS | |
3467 | * referrals for this path without prefix, to provide support | |
3468 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3469 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3470 | * Chase the referral if found, otherwise continue normally. | |
3471 | */ | |
3472 | if (referral_walks_count == 0) { | |
3473 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3474 | cifs_sb, false); |
c1508ca2 SF |
3475 | if (!refrc) { |
3476 | referral_walks_count++; | |
3477 | goto try_mount_again; | |
3478 | } | |
3479 | } | |
3480 | #endif | |
3481 | ||
f87d39d9 | 3482 | /* check if a whole path is not remote */ |
70945643 | 3483 | if (!rc && tcon) { |
e4cce94c | 3484 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3485 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3486 | if (full_path == NULL) { |
3487 | rc = -ENOMEM; | |
3488 | goto mount_fail_check; | |
3489 | } | |
3490 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3491 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3492 | kfree(full_path); |
3493 | goto mount_fail_check; | |
3494 | } | |
3495 | kfree(full_path); | |
3496 | } | |
3497 | ||
1bfe73c2 IM |
3498 | /* get referral if needed */ |
3499 | if (rc == -EREMOTE) { | |
d036f50f | 3500 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3501 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3502 | /* | |
3503 | * BB: when we implement proper loop detection, | |
3504 | * we will remove this check. But now we need it | |
3505 | * to prevent an indefinite loop if 'DFS tree' is | |
3506 | * misconfigured (i.e. has loops). | |
3507 | */ | |
3508 | rc = -ELOOP; | |
3509 | goto mount_fail_check; | |
3510 | } | |
1bfe73c2 | 3511 | |
dd613945 | 3512 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3513 | true); |
7b91e266 | 3514 | |
dd613945 | 3515 | if (!rc) { |
5c2503a8 | 3516 | referral_walks_count++; |
1bfe73c2 IM |
3517 | goto try_mount_again; |
3518 | } | |
dd613945 | 3519 | goto mount_fail_check; |
d036f50f SF |
3520 | #else /* No DFS support, return error on mount */ |
3521 | rc = -EOPNOTSUPP; | |
3522 | #endif | |
1bfe73c2 IM |
3523 | } |
3524 | ||
9d002df4 JL |
3525 | if (rc) |
3526 | goto mount_fail_check; | |
3527 | ||
3528 | /* now, hang the tcon off of the superblock */ | |
3529 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3530 | if (tlink == NULL) { | |
3531 | rc = -ENOMEM; | |
3532 | goto mount_fail_check; | |
3533 | } | |
3534 | ||
b647c35f | 3535 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3536 | tlink->tl_tcon = tcon; |
3537 | tlink->tl_time = jiffies; | |
3538 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3539 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3540 | ||
b647c35f | 3541 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3542 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3543 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3544 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3545 | |
2de970ff JL |
3546 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
3547 | TLINK_IDLE_EXPIRE); | |
3548 | ||
1bfe73c2 IM |
3549 | mount_fail_check: |
3550 | /* on error free sesinfo and tcon struct if needed */ | |
3551 | if (rc) { | |
1bfe73c2 | 3552 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3553 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3554 | if (tcon) |
3555 | cifs_put_tcon(tcon); | |
3556 | else if (pSesInfo) | |
3557 | cifs_put_smb_ses(pSesInfo); | |
3558 | else | |
3559 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3560 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3561 | } |
3562 | ||
70fe7dc0 | 3563 | out: |
1da177e4 LT |
3564 | FreeXid(xid); |
3565 | return rc; | |
3566 | } | |
3567 | ||
8d1bca32 JL |
3568 | /* |
3569 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3570 | * pointer may be NULL. | |
3571 | */ | |
1da177e4 | 3572 | int |
96daf2b0 SF |
3573 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
3574 | const char *tree, struct cifs_tcon *tcon, | |
1da177e4 LT |
3575 | const struct nls_table *nls_codepage) |
3576 | { | |
3577 | struct smb_hdr *smb_buffer; | |
3578 | struct smb_hdr *smb_buffer_response; | |
3579 | TCONX_REQ *pSMB; | |
3580 | TCONX_RSP *pSMBr; | |
3581 | unsigned char *bcc_ptr; | |
3582 | int rc = 0; | |
690c522f JL |
3583 | int length; |
3584 | __u16 bytes_left, count; | |
1da177e4 LT |
3585 | |
3586 | if (ses == NULL) | |
3587 | return -EIO; | |
3588 | ||
3589 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3590 | if (smb_buffer == NULL) |
1da177e4 | 3591 | return -ENOMEM; |
ca43e3be | 3592 | |
1da177e4 LT |
3593 | smb_buffer_response = smb_buffer; |
3594 | ||
3595 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3596 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3597 | |
3598 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3599 | smb_buffer->Uid = ses->Suid; |
3600 | pSMB = (TCONX_REQ *) smb_buffer; | |
3601 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3602 | ||
3603 | pSMB->AndXCommand = 0xFF; | |
3604 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3605 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3606 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3607 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3608 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3609 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3610 | /* already aligned so no need to do it below */ |
eeac8047 | 3611 | } else { |
540b2e37 | 3612 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3613 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3614 | specified as required (when that support is added to | |
3615 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3616 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3617 | by Samba (not sure whether other servers allow |
3618 | NTLMv2 password here) */ | |
7c7b25bc | 3619 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3620 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3621 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3622 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3623 | ses->server->sec_mode & |
4e53a3fb JL |
3624 | SECMODE_PW_ENCRYPT ? true : false, |
3625 | bcc_ptr); | |
7c7b25bc SF |
3626 | else |
3627 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3628 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3629 | bcc_ptr, nls_codepage); |
eeac8047 | 3630 | |
540b2e37 | 3631 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3632 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3633 | /* must align unicode strings */ |
3634 | *bcc_ptr = 0; /* null byte password */ | |
3635 | bcc_ptr++; | |
3636 | } | |
eeac8047 | 3637 | } |
1da177e4 | 3638 | |
96daf2b0 | 3639 | if (ses->server->sec_mode & |
a878fb22 | 3640 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3641 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3642 | ||
3643 | if (ses->capabilities & CAP_STATUS32) { | |
3644 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3645 | } | |
3646 | if (ses->capabilities & CAP_DFS) { | |
3647 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3648 | } | |
3649 | if (ses->capabilities & CAP_UNICODE) { | |
3650 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3651 | length = | |
acbbb76a | 3652 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3653 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3654 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3655 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3656 | bcc_ptr += 2; /* skip trailing null */ |
3657 | } else { /* ASCII */ | |
1da177e4 LT |
3658 | strcpy(bcc_ptr, tree); |
3659 | bcc_ptr += strlen(tree) + 1; | |
3660 | } | |
3661 | strcpy(bcc_ptr, "?????"); | |
3662 | bcc_ptr += strlen("?????"); | |
3663 | bcc_ptr += 1; | |
3664 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3665 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3666 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3667 | pSMB->ByteCount = cpu_to_le16(count); |
3668 | ||
133672ef | 3669 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3670 | 0); |
1da177e4 | 3671 | |
1da177e4 LT |
3672 | /* above now done in SendReceive */ |
3673 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3674 | bool is_unicode; |
3675 | ||
1da177e4 | 3676 | tcon->tidStatus = CifsGood; |
3b795210 | 3677 | tcon->need_reconnect = false; |
1da177e4 LT |
3678 | tcon->tid = smb_buffer_response->Tid; |
3679 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3680 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3681 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3682 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3683 | is_unicode = true; | |
3684 | else | |
3685 | is_unicode = false; | |
3686 | ||
cc20c031 | 3687 | |
50c2f753 | 3688 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3689 | if (length == 3) { |
3690 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3691 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3692 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3693 | tcon->ipc = 1; |
3694 | } | |
3695 | } else if (length == 2) { | |
3696 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3697 | /* the most common case */ | |
b6b38f70 | 3698 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3699 | } |
3700 | } | |
50c2f753 | 3701 | bcc_ptr += length + 1; |
cc20c031 | 3702 | bytes_left -= (length + 1); |
1da177e4 | 3703 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3704 | |
3705 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3706 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3707 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3708 | bytes_left, is_unicode, |
cc20c031 JL |
3709 | nls_codepage); |
3710 | ||
b6b38f70 | 3711 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3712 | |
fb8c4b14 | 3713 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3714 | (smb_buffer_response->WordCount == 7)) |
3715 | /* field is in same location */ | |
3979877e SF |
3716 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3717 | else | |
3718 | tcon->Flags = 0; | |
b6b38f70 | 3719 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3720 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3721 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3722 | ses->ipc_tid = smb_buffer_response->Tid; |
3723 | } | |
3724 | ||
a8a11d39 | 3725 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3726 | return rc; |
3727 | } | |
3728 | ||
2a9b9951 AV |
3729 | void |
3730 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3731 | { |
b647c35f JL |
3732 | struct rb_root *root = &cifs_sb->tlink_tree; |
3733 | struct rb_node *node; | |
3734 | struct tcon_link *tlink; | |
9d002df4 | 3735 | |
2de970ff JL |
3736 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3737 | ||
b647c35f JL |
3738 | spin_lock(&cifs_sb->tlink_tree_lock); |
3739 | while ((node = rb_first(root))) { | |
3740 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3741 | cifs_get_tlink(tlink); | |
3742 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3743 | rb_erase(node, root); | |
1da177e4 | 3744 | |
b647c35f JL |
3745 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3746 | cifs_put_tlink(tlink); | |
3747 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3748 | } | |
3749 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3750 | |
dd854466 | 3751 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3752 | kfree(cifs_sb->mountdata); |
3753 | unload_nls(cifs_sb->local_nls); | |
3754 | kfree(cifs_sb); | |
50c2f753 | 3755 | } |
1da177e4 | 3756 | |
96daf2b0 | 3757 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
1da177e4 LT |
3758 | { |
3759 | int rc = 0; | |
198b5682 | 3760 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3761 | |
198b5682 JL |
3762 | /* only send once per connect */ |
3763 | if (server->maxBuf != 0) | |
3764 | return 0; | |
3765 | ||
2d86dbc9 | 3766 | cifs_set_credits(server, 1); |
198b5682 JL |
3767 | rc = CIFSSMBNegotiate(xid, ses); |
3768 | if (rc == -EAGAIN) { | |
3769 | /* retry only once on 1st time connection */ | |
2d86dbc9 | 3770 | cifs_set_credits(server, 1); |
198b5682 JL |
3771 | rc = CIFSSMBNegotiate(xid, ses); |
3772 | if (rc == -EAGAIN) | |
3773 | rc = -EHOSTDOWN; | |
1da177e4 | 3774 | } |
198b5682 JL |
3775 | if (rc == 0) { |
3776 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3777 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3778 | server->tcpStatus = CifsGood; |
3779 | else | |
3780 | rc = -EHOSTDOWN; | |
3781 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3782 | |
198b5682 JL |
3783 | } |
3784 | ||
3785 | return rc; | |
3786 | } | |
3787 | ||
3788 | ||
96daf2b0 | 3789 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
198b5682 JL |
3790 | struct nls_table *nls_info) |
3791 | { | |
3792 | int rc = 0; | |
3793 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3794 | |
198b5682 JL |
3795 | ses->flags = 0; |
3796 | ses->capabilities = server->capabilities; | |
26b994fa | 3797 | if (linuxExtEnabled == 0) |
198b5682 | 3798 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3799 | |
b6b38f70 | 3800 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 3801 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3802 | |
198b5682 | 3803 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3804 | if (rc) { |
b6b38f70 | 3805 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3806 | } else { |
5d0d2882 SP |
3807 | mutex_lock(&ses->server->srv_mutex); |
3808 | if (!server->session_estab) { | |
21e73393 | 3809 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3810 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3811 | server->sequence_number = 0x2; |
3812 | server->session_estab = true; | |
3813 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3814 | } |
3815 | mutex_unlock(&server->srv_mutex); | |
3816 | ||
b6b38f70 | 3817 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3818 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3819 | ses->status = CifsGood; |
3820 | ses->need_reconnect = false; | |
20418acd | 3821 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3822 | } |
26b994fa | 3823 | |
21e73393 SP |
3824 | kfree(ses->auth_key.response); |
3825 | ses->auth_key.response = NULL; | |
3826 | ses->auth_key.len = 0; | |
d3686d54 SP |
3827 | kfree(ses->ntlmssp); |
3828 | ses->ntlmssp = NULL; | |
21e73393 | 3829 | |
1da177e4 LT |
3830 | return rc; |
3831 | } | |
3832 | ||
8a8798a5 JL |
3833 | static int |
3834 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3835 | { | |
3836 | switch (ses->server->secType) { | |
3837 | case Kerberos: | |
3838 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
3839 | return 0; | |
3840 | case NTLMv2: | |
3841 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
3842 | break; | |
3843 | case NTLM: | |
3844 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
3845 | break; | |
3846 | case RawNTLMSSP: | |
3847 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
3848 | break; | |
3849 | case LANMAN: | |
3850 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
3851 | break; | |
3852 | } | |
3853 | ||
3854 | return cifs_set_cifscreds(vol, ses); | |
3855 | } | |
3856 | ||
96daf2b0 | 3857 | static struct cifs_tcon * |
9d002df4 JL |
3858 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3859 | { | |
8a8798a5 | 3860 | int rc; |
96daf2b0 SF |
3861 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3862 | struct cifs_ses *ses; | |
3863 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3864 | struct smb_vol *vol_info; |
9d002df4 JL |
3865 | |
3866 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3867 | if (vol_info == NULL) |
3868 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3869 | |
9d002df4 JL |
3870 | vol_info->local_nls = cifs_sb->local_nls; |
3871 | vol_info->linux_uid = fsuid; | |
3872 | vol_info->cred_uid = fsuid; | |
3873 | vol_info->UNC = master_tcon->treeName; | |
3874 | vol_info->retry = master_tcon->retry; | |
3875 | vol_info->nocase = master_tcon->nocase; | |
3876 | vol_info->local_lease = master_tcon->local_lease; | |
3877 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3878 | ||
8a8798a5 JL |
3879 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3880 | if (rc) { | |
3881 | tcon = ERR_PTR(rc); | |
3882 | goto out; | |
3883 | } | |
9d002df4 JL |
3884 | |
3885 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3886 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3887 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3888 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3889 | |
3890 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3891 | if (IS_ERR(ses)) { | |
96daf2b0 | 3892 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3893 | cifs_put_tcp_session(master_tcon->ses->server); |
3894 | goto out; | |
3895 | } | |
3896 | ||
3897 | tcon = cifs_get_tcon(ses, vol_info); | |
3898 | if (IS_ERR(tcon)) { | |
3899 | cifs_put_smb_ses(ses); | |
3900 | goto out; | |
3901 | } | |
3902 | ||
3903 | if (ses->capabilities & CAP_UNIX) | |
3904 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3905 | out: | |
8a8798a5 JL |
3906 | kfree(vol_info->username); |
3907 | kfree(vol_info->password); | |
9d002df4 JL |
3908 | kfree(vol_info); |
3909 | ||
3910 | return tcon; | |
3911 | } | |
3912 | ||
96daf2b0 | 3913 | struct cifs_tcon * |
9d002df4 JL |
3914 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3915 | { | |
3916 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3917 | } | |
3918 | ||
3919 | static int | |
3920 | cifs_sb_tcon_pending_wait(void *unused) | |
3921 | { | |
3922 | schedule(); | |
3923 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3924 | } | |
3925 | ||
b647c35f JL |
3926 | /* find and return a tlink with given uid */ |
3927 | static struct tcon_link * | |
3928 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3929 | { | |
3930 | struct rb_node *node = root->rb_node; | |
3931 | struct tcon_link *tlink; | |
3932 | ||
3933 | while (node) { | |
3934 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3935 | ||
3936 | if (tlink->tl_uid > uid) | |
3937 | node = node->rb_left; | |
3938 | else if (tlink->tl_uid < uid) | |
3939 | node = node->rb_right; | |
3940 | else | |
3941 | return tlink; | |
3942 | } | |
3943 | return NULL; | |
3944 | } | |
3945 | ||
3946 | /* insert a tcon_link into the tree */ | |
3947 | static void | |
3948 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3949 | { | |
3950 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3951 | struct tcon_link *tlink; | |
3952 | ||
3953 | while (*new) { | |
3954 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3955 | parent = *new; | |
3956 | ||
3957 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3958 | new = &((*new)->rb_left); | |
3959 | else | |
3960 | new = &((*new)->rb_right); | |
3961 | } | |
3962 | ||
3963 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3964 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3965 | } | |
3966 | ||
9d002df4 JL |
3967 | /* |
3968 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3969 | * current task. | |
3970 | * | |
3971 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3972 | * the master tcon for the mount. | |
3973 | * | |
6ef933a3 | 3974 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3975 | * exists, then check to see if it's pending construction. If it is then wait |
3976 | * for construction to complete. Once it's no longer pending, check to see if | |
3977 | * it failed and either return an error or retry construction, depending on | |
3978 | * the timeout. | |
3979 | * | |
3980 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3981 | * try to construct a new one. | |
3982 | */ | |
3983 | struct tcon_link * | |
3984 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3985 | { | |
3986 | int ret; | |
b647c35f | 3987 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3988 | struct tcon_link *tlink, *newtlink; |
3989 | ||
3990 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3991 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3992 | ||
3993 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3994 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3995 | if (tlink) |
3996 | cifs_get_tlink(tlink); | |
3997 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3998 | ||
3999 | if (tlink == NULL) { | |
4000 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4001 | if (newtlink == NULL) | |
4002 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4003 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4004 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4005 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4006 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4007 | cifs_get_tlink(newtlink); | |
4008 | ||
9d002df4 JL |
4009 | spin_lock(&cifs_sb->tlink_tree_lock); |
4010 | /* was one inserted after previous search? */ | |
b647c35f | 4011 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4012 | if (tlink) { |
4013 | cifs_get_tlink(tlink); | |
4014 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4015 | kfree(newtlink); |
4016 | goto wait_for_construction; | |
4017 | } | |
9d002df4 | 4018 | tlink = newtlink; |
b647c35f JL |
4019 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4020 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4021 | } else { |
4022 | wait_for_construction: | |
4023 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4024 | cifs_sb_tcon_pending_wait, | |
4025 | TASK_INTERRUPTIBLE); | |
4026 | if (ret) { | |
4027 | cifs_put_tlink(tlink); | |
4028 | return ERR_PTR(ret); | |
4029 | } | |
4030 | ||
4031 | /* if it's good, return it */ | |
4032 | if (!IS_ERR(tlink->tl_tcon)) | |
4033 | return tlink; | |
4034 | ||
4035 | /* return error if we tried this already recently */ | |
4036 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4037 | cifs_put_tlink(tlink); | |
4038 | return ERR_PTR(-EACCES); | |
4039 | } | |
4040 | ||
4041 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4042 | goto wait_for_construction; | |
4043 | } | |
4044 | ||
4045 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4046 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4047 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4048 | ||
4049 | if (IS_ERR(tlink->tl_tcon)) { | |
4050 | cifs_put_tlink(tlink); | |
4051 | return ERR_PTR(-EACCES); | |
4052 | } | |
4053 | ||
4054 | return tlink; | |
4055 | } | |
2de970ff JL |
4056 | |
4057 | /* | |
4058 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4059 | * out tcons. | |
4060 | */ | |
4061 | static void | |
4062 | cifs_prune_tlinks(struct work_struct *work) | |
4063 | { | |
4064 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4065 | prune_tlinks.work); | |
b647c35f JL |
4066 | struct rb_root *root = &cifs_sb->tlink_tree; |
4067 | struct rb_node *node = rb_first(root); | |
4068 | struct rb_node *tmp; | |
4069 | struct tcon_link *tlink; | |
2de970ff | 4070 | |
b647c35f JL |
4071 | /* |
4072 | * Because we drop the spinlock in the loop in order to put the tlink | |
4073 | * it's not guarded against removal of links from the tree. The only | |
4074 | * places that remove entries from the tree are this function and | |
4075 | * umounts. Because this function is non-reentrant and is canceled | |
4076 | * before umount can proceed, this is safe. | |
4077 | */ | |
4078 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4079 | node = rb_first(root); | |
4080 | while (node != NULL) { | |
4081 | tmp = node; | |
4082 | node = rb_next(tmp); | |
4083 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4084 | ||
4085 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4086 | atomic_read(&tlink->tl_count) != 0 || | |
4087 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4088 | continue; | |
2de970ff | 4089 | |
b647c35f JL |
4090 | cifs_get_tlink(tlink); |
4091 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4092 | rb_erase(tmp, root); | |
4093 | ||
4094 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4095 | cifs_put_tlink(tlink); | |
4096 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4097 | } | |
4098 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
4099 | |
4100 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
4101 | TLINK_IDLE_EXPIRE); | |
4102 | } |