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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> |
0e2bedaa | 40 | #include <net/ipv6.h> |
1da177e4 LT |
41 | #include "cifspdu.h" |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_unicode.h" | |
45 | #include "cifs_debug.h" | |
46 | #include "cifs_fs_sb.h" | |
47 | #include "ntlmssp.h" | |
48 | #include "nterr.h" | |
49 | #include "rfc1002pdu.h" | |
488f1d2d | 50 | #include "fscache.h" |
1da177e4 LT |
51 | |
52 | #define CIFS_PORT 445 | |
53 | #define RFC1001_PORT 139 | |
54 | ||
c74093b6 JL |
55 | /* SMB echo "timeout" -- FIXME: tunable? */ |
56 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
57 | ||
1da177e4 LT |
58 | extern mempool_t *cifs_req_poolp; |
59 | ||
60 | struct smb_vol { | |
61 | char *username; | |
62 | char *password; | |
63 | char *domainname; | |
64 | char *UNC; | |
65 | char *UNCip; | |
1da177e4 | 66 | char *iocharset; /* local code page for mapping to and from Unicode */ |
1397f2ee JL |
67 | char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */ |
68 | char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */ | |
3e4b3e1f | 69 | uid_t cred_uid; |
1da177e4 LT |
70 | uid_t linux_uid; |
71 | gid_t linux_gid; | |
72 | mode_t file_mode; | |
73 | mode_t dir_mode; | |
189acaae | 74 | unsigned secFlg; |
4b18f2a9 SF |
75 | bool retry:1; |
76 | bool intr:1; | |
77 | bool setuids:1; | |
78 | bool override_uid:1; | |
79 | bool override_gid:1; | |
d0a9c078 | 80 | bool dynperm:1; |
4b18f2a9 SF |
81 | bool noperm:1; |
82 | bool no_psx_acl:1; /* set if posix acl support should be disabled */ | |
83 | bool cifs_acl:1; | |
84 | bool no_xattr:1; /* set if xattr (EA) support should be disabled*/ | |
85 | bool server_ino:1; /* use inode numbers from server ie UniqueId */ | |
86 | bool direct_io:1; | |
d39454ff | 87 | bool strict_io:1; /* strict cache behavior */ |
95b1cb90 SF |
88 | bool remap:1; /* set to remap seven reserved chars in filenames */ |
89 | bool posix_paths:1; /* unset to not ask for posix pathnames. */ | |
4b18f2a9 SF |
90 | bool no_linux_ext:1; |
91 | bool sfu_emul:1; | |
95b1cb90 SF |
92 | bool nullauth:1; /* attempt to authenticate with null user */ |
93 | bool nocase:1; /* request case insensitive filenames */ | |
94 | bool nobrl:1; /* disable sending byte range locks to srv */ | |
13a6e42a | 95 | bool mand_lock:1; /* send mandatory not posix byte range lock reqs */ |
95b1cb90 | 96 | bool seal:1; /* request transport encryption on share */ |
84210e91 SF |
97 | bool nodfs:1; /* Do not request DFS, even if available */ |
98 | bool local_lease:1; /* check leases only on local system, not remote */ | |
edf1ae40 SF |
99 | bool noblocksnd:1; |
100 | bool noautotune:1; | |
be652445 | 101 | bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ |
fa1df75d | 102 | bool fsc:1; /* enable fscache */ |
736a3320 | 103 | bool mfsymlinks:1; /* use Minshall+French Symlinks */ |
0eb8a132 | 104 | bool multiuser:1; |
1da177e4 LT |
105 | unsigned int rsize; |
106 | unsigned int wsize; | |
6a5fa236 | 107 | bool sockopt_tcp_nodelay:1; |
1da177e4 | 108 | unsigned short int port; |
6d20e840 | 109 | unsigned long actimeo; /* attribute cache timeout (jiffies) */ |
fb8c4b14 | 110 | char *prepath; |
3eb9a889 | 111 | struct sockaddr_storage srcaddr; /* allow binding to a local IP */ |
a5fc4ce0 | 112 | struct nls_table *local_nls; |
1da177e4 LT |
113 | }; |
114 | ||
2de970ff | 115 | /* FIXME: should these be tunable? */ |
9d002df4 | 116 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 117 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 118 | |
a9f1b85e PS |
119 | static int ip_connect(struct TCP_Server_Info *server); |
120 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 121 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 122 | static void cifs_prune_tlinks(struct work_struct *work); |
1da177e4 | 123 | |
d5c5605c JL |
124 | /* |
125 | * cifs tcp session reconnection | |
126 | * | |
127 | * mark tcp session as reconnecting so temporarily locked | |
128 | * mark all smb sessions as reconnecting for tcp session | |
129 | * reconnect tcp session | |
130 | * wake up waiters on reconnection? - (not needed currently) | |
131 | */ | |
2cd646a2 | 132 | static int |
1da177e4 LT |
133 | cifs_reconnect(struct TCP_Server_Info *server) |
134 | { | |
135 | int rc = 0; | |
f1987b44 | 136 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
137 | struct cifsSesInfo *ses; |
138 | struct cifsTconInfo *tcon; | |
fb8c4b14 | 139 | struct mid_q_entry *mid_entry; |
50c2f753 | 140 | |
1da177e4 | 141 | spin_lock(&GlobalMid_Lock); |
469ee614 | 142 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 143 | /* the demux thread will exit normally |
1da177e4 LT |
144 | next time through the loop */ |
145 | spin_unlock(&GlobalMid_Lock); | |
146 | return rc; | |
147 | } else | |
148 | server->tcpStatus = CifsNeedReconnect; | |
149 | spin_unlock(&GlobalMid_Lock); | |
150 | server->maxBuf = 0; | |
151 | ||
b6b38f70 | 152 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
153 | |
154 | /* before reconnecting the tcp session, mark the smb session (uid) | |
155 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 156 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 157 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d JL |
158 | list_for_each(tmp, &server->smb_ses_list) { |
159 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
160 | ses->need_reconnect = true; | |
161 | ses->ipc_tid = 0; | |
f1987b44 JL |
162 | list_for_each(tmp2, &ses->tcon_list) { |
163 | tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list); | |
3b795210 | 164 | tcon->need_reconnect = true; |
1da177e4 | 165 | } |
1da177e4 | 166 | } |
3f9bcca7 | 167 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 168 | |
1da177e4 | 169 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 170 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 171 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 172 | if (server->ssocket) { |
b6b38f70 JP |
173 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
174 | server->ssocket->flags); | |
91cf45f0 | 175 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 176 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 177 | server->ssocket->state, |
b6b38f70 | 178 | server->ssocket->flags); |
1da177e4 LT |
179 | sock_release(server->ssocket); |
180 | server->ssocket = NULL; | |
181 | } | |
5d0d2882 SP |
182 | server->sequence_number = 0; |
183 | server->session_estab = false; | |
21e73393 SP |
184 | kfree(server->session_key.response); |
185 | server->session_key.response = NULL; | |
186 | server->session_key.len = 0; | |
fda35943 | 187 | server->lstrp = jiffies; |
2b84a36c | 188 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 189 | |
2b84a36c JL |
190 | /* mark submitted MIDs for retry and issue callback */ |
191 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
1da177e4 | 192 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
193 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
194 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
195 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) | |
ad8b15f0 | 196 | mid_entry->midState = MID_RETRY_NEEDED; |
2b84a36c JL |
197 | list_del_init(&mid_entry->qhead); |
198 | mid_entry->callback(mid_entry); | |
1da177e4 LT |
199 | } |
200 | spin_unlock(&GlobalMid_Lock); | |
1da177e4 | 201 | |
fd88ce93 | 202 | while (server->tcpStatus == CifsNeedReconnect) { |
6c3d8909 | 203 | try_to_freeze(); |
a9f1b85e PS |
204 | |
205 | /* we should try only the port we connected to before */ | |
206 | rc = generic_ip_connect(server); | |
fb8c4b14 | 207 | if (rc) { |
b6b38f70 | 208 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 209 | msleep(3000); |
1da177e4 LT |
210 | } else { |
211 | atomic_inc(&tcpSesReconnectCount); | |
212 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 213 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 214 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 215 | spin_unlock(&GlobalMid_Lock); |
1da177e4 LT |
216 | } |
217 | } | |
2b84a36c | 218 | |
1da177e4 LT |
219 | return rc; |
220 | } | |
221 | ||
fb8c4b14 | 222 | /* |
e4eb295d SF |
223 | return codes: |
224 | 0 not a transact2, or all data present | |
225 | >0 transact2 with that much data missing | |
226 | -EINVAL = invalid transact2 | |
227 | ||
228 | */ | |
fb8c4b14 | 229 | static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) |
e4eb295d | 230 | { |
fb8c4b14 | 231 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 232 | int remaining; |
26ec2548 | 233 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 234 | |
fb8c4b14 | 235 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
236 | return 0; |
237 | ||
fb8c4b14 SF |
238 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
239 | /* check for parm and data offset going beyond end of smb */ | |
240 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 241 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
242 | return -EINVAL; |
243 | } | |
244 | ||
245 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
246 | ||
26ec2548 JL |
247 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
248 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 249 | |
c0c7b905 | 250 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 251 | return 0; |
c0c7b905 | 252 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
253 | cFYI(1, "total data %d smaller than data in frame %d", |
254 | total_data_size, data_in_this_rsp); | |
e4eb295d | 255 | return -EINVAL; |
e4eb295d | 256 | } |
c0c7b905 JL |
257 | |
258 | remaining = total_data_size - data_in_this_rsp; | |
259 | ||
260 | cFYI(1, "missing %d bytes from transact2, check next response", | |
261 | remaining); | |
262 | if (total_data_size > maxBufSize) { | |
263 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", | |
264 | total_data_size, maxBufSize); | |
265 | return -EINVAL; | |
266 | } | |
267 | return remaining; | |
e4eb295d SF |
268 | } |
269 | ||
fb8c4b14 | 270 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
271 | { |
272 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
273 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
fb8c4b14 SF |
274 | char *data_area_of_target; |
275 | char *data_area_of_buf2; | |
26ec2548 | 276 | int remaining; |
2a2047bc JL |
277 | unsigned int byte_count, total_in_buf; |
278 | __u16 total_data_size, total_in_buf2; | |
e4eb295d | 279 | |
26ec2548 | 280 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
e4eb295d | 281 | |
26ec2548 JL |
282 | if (total_data_size != |
283 | get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount)) | |
b6b38f70 | 284 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d | 285 | |
26ec2548 | 286 | total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d SF |
287 | |
288 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 289 | |
fb8c4b14 | 290 | if (remaining < 0) |
2a2047bc | 291 | return -EPROTO; |
e4eb295d | 292 | |
fb8c4b14 | 293 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 294 | return 0; |
50c2f753 | 295 | |
26ec2548 | 296 | total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 297 | if (remaining < total_in_buf2) { |
b6b38f70 | 298 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
299 | } |
300 | ||
301 | /* find end of first SMB data area */ | |
fb8c4b14 | 302 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 303 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d SF |
304 | /* validate target area */ |
305 | ||
26ec2548 JL |
306 | data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol + |
307 | get_unaligned_le16(&pSMB2->t2_rsp.DataOffset); | |
e4eb295d SF |
308 | |
309 | data_area_of_target += total_in_buf; | |
310 | ||
311 | /* copy second buffer into end of first buffer */ | |
e4eb295d | 312 | total_in_buf += total_in_buf2; |
2a2047bc JL |
313 | /* is the result too big for the field? */ |
314 | if (total_in_buf > USHRT_MAX) | |
315 | return -EPROTO; | |
26ec2548 | 316 | put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); |
2a2047bc JL |
317 | |
318 | /* fix up the BCC */ | |
820a803f | 319 | byte_count = get_bcc(pTargetSMB); |
e4eb295d | 320 | byte_count += total_in_buf2; |
2a2047bc JL |
321 | /* is the result too big for the field? */ |
322 | if (byte_count > USHRT_MAX) | |
323 | return -EPROTO; | |
820a803f | 324 | put_bcc(byte_count, pTargetSMB); |
e4eb295d | 325 | |
be8e3b00 | 326 | byte_count = be32_to_cpu(pTargetSMB->smb_buf_length); |
e4eb295d | 327 | byte_count += total_in_buf2; |
2a2047bc JL |
328 | /* don't allow buffer to overflow */ |
329 | if (byte_count > CIFSMaxBufSize) | |
330 | return -ENOBUFS; | |
be8e3b00 | 331 | pTargetSMB->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 332 | |
2a2047bc JL |
333 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
334 | ||
fb8c4b14 | 335 | if (remaining == total_in_buf2) { |
b6b38f70 | 336 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
337 | return 0; /* we are done */ |
338 | } else /* more responses to go */ | |
339 | return 1; | |
e4eb295d SF |
340 | } |
341 | ||
c74093b6 JL |
342 | static void |
343 | cifs_echo_request(struct work_struct *work) | |
344 | { | |
345 | int rc; | |
346 | struct TCP_Server_Info *server = container_of(work, | |
347 | struct TCP_Server_Info, echo.work); | |
348 | ||
247ec9b4 | 349 | /* |
195291e6 JL |
350 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
351 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
352 | * we got a response recently | |
247ec9b4 | 353 | */ |
195291e6 | 354 | if (server->maxBuf == 0 || |
247ec9b4 | 355 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
356 | goto requeue_echo; |
357 | ||
358 | rc = CIFSSMBEcho(server); | |
359 | if (rc) | |
360 | cFYI(1, "Unable to send echo request to server: %s", | |
361 | server->hostname); | |
362 | ||
363 | requeue_echo: | |
364 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
365 | } | |
366 | ||
1da177e4 LT |
367 | static int |
368 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
369 | { | |
370 | int length; | |
371 | unsigned int pdu_length, total_read; | |
372 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
373 | struct smb_hdr *bigbuf = NULL; |
374 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
375 | struct msghdr smb_msg; |
376 | struct kvec iov; | |
377 | struct socket *csocket = server->ssocket; | |
2b84a36c | 378 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
379 | struct task_struct *task_to_wake = NULL; |
380 | struct mid_q_entry *mid_entry; | |
70ca734a | 381 | char temp; |
4b18f2a9 SF |
382 | bool isLargeBuf = false; |
383 | bool isMultiRsp; | |
e4eb295d | 384 | int reconnect; |
1da177e4 | 385 | |
1da177e4 | 386 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 387 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
388 | |
389 | length = atomic_inc_return(&tcpSesAllocCount); | |
390 | if (length > 1) | |
26f57364 SF |
391 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
392 | GFP_KERNEL); | |
1da177e4 | 393 | |
83144186 | 394 | set_freezable(); |
469ee614 | 395 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
396 | if (try_to_freeze()) |
397 | continue; | |
b8643e1b SF |
398 | if (bigbuf == NULL) { |
399 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 400 | if (!bigbuf) { |
b6b38f70 | 401 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
402 | msleep(3000); |
403 | /* retry will check if exiting */ | |
404 | continue; | |
405 | } | |
0fd1ffe0 PM |
406 | } else if (isLargeBuf) { |
407 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 408 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 409 | } |
b8643e1b SF |
410 | |
411 | if (smallbuf == NULL) { | |
412 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 413 | if (!smallbuf) { |
b6b38f70 | 414 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
415 | msleep(1000); |
416 | /* retry will check if exiting */ | |
417 | continue; | |
418 | } | |
419 | /* beginning of smb buffer is cleared in our buf_get */ | |
420 | } else /* if existing small buf clear beginning */ | |
26f57364 | 421 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 422 | |
4b18f2a9 SF |
423 | isLargeBuf = false; |
424 | isMultiRsp = false; | |
b8643e1b | 425 | smb_buffer = smallbuf; |
1da177e4 LT |
426 | iov.iov_base = smb_buffer; |
427 | iov.iov_len = 4; | |
428 | smb_msg.msg_control = NULL; | |
429 | smb_msg.msg_controllen = 0; | |
f01d5e14 | 430 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 431 | |
f01d5e14 | 432 | incomplete_rcv: |
fd88ce93 | 433 | if (echo_retries > 0 && server->tcpStatus == CifsGood && |
fda35943 SF |
434 | time_after(jiffies, server->lstrp + |
435 | (echo_retries * SMB_ECHO_INTERVAL))) { | |
436 | cERROR(1, "Server %s has not responded in %d seconds. " | |
437 | "Reconnecting...", server->hostname, | |
438 | (echo_retries * SMB_ECHO_INTERVAL / HZ)); | |
439 | cifs_reconnect(server); | |
440 | csocket = server->ssocket; | |
441 | wake_up(&server->response_q); | |
442 | continue; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | length = |
446 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 447 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 448 | |
469ee614 | 449 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
450 | break; |
451 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 452 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 453 | cifs_reconnect(server); |
b6b38f70 | 454 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
455 | csocket = server->ssocket; |
456 | continue; | |
522bbe65 JL |
457 | } else if (length == -ERESTARTSYS || |
458 | length == -EAGAIN || | |
459 | length == -EINTR) { | |
b8643e1b | 460 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
461 | allowing socket to clear and app threads to set |
462 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
463 | if (pdu_length < 4) { |
464 | iov.iov_base = (4 - pdu_length) + | |
465 | (char *)smb_buffer; | |
466 | iov.iov_len = pdu_length; | |
467 | smb_msg.msg_control = NULL; | |
468 | smb_msg.msg_controllen = 0; | |
c18c732e | 469 | goto incomplete_rcv; |
c527c8a7 | 470 | } else |
c18c732e | 471 | continue; |
1da177e4 | 472 | } else if (length <= 0) { |
b6b38f70 JP |
473 | cFYI(1, "Reconnect after unexpected peek error %d", |
474 | length); | |
1da177e4 LT |
475 | cifs_reconnect(server); |
476 | csocket = server->ssocket; | |
477 | wake_up(&server->response_q); | |
478 | continue; | |
2a974680 | 479 | } else if (length < pdu_length) { |
b6b38f70 JP |
480 | cFYI(1, "requested %d bytes but only got %d bytes", |
481 | pdu_length, length); | |
f01d5e14 | 482 | pdu_length -= length; |
f01d5e14 SF |
483 | msleep(1); |
484 | goto incomplete_rcv; | |
46810cbf | 485 | } |
1da177e4 | 486 | |
70ca734a SF |
487 | /* The right amount was read from socket - 4 bytes */ |
488 | /* so we can now interpret the length field */ | |
46810cbf | 489 | |
70ca734a SF |
490 | /* the first byte big endian of the length field, |
491 | is actually not part of the length but the type | |
492 | with the most common, zero, as regular data */ | |
493 | temp = *((char *) smb_buffer); | |
46810cbf | 494 | |
fb8c4b14 | 495 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
496 | but we convert it here so it is always manipulated |
497 | as host byte order */ | |
be8e3b00 | 498 | pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
70ca734a | 499 | |
b6b38f70 | 500 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 501 | |
70ca734a | 502 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 503 | continue; |
70ca734a | 504 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 505 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 506 | continue; |
70ca734a | 507 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 508 | /* we get this from Windows 98 instead of |
46810cbf | 509 | an error on SMB negprot response */ |
b6b38f70 JP |
510 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
511 | pdu_length); | |
7332f2a6 JL |
512 | /* give server a second to clean up */ |
513 | msleep(1000); | |
514 | /* always try 445 first on reconnect since we get NACK | |
515 | * on some if we ever connected to port 139 (the NACK | |
516 | * is since we do not begin with RFC1001 session | |
517 | * initialize frame) | |
518 | */ | |
32670396 | 519 | cifs_set_port((struct sockaddr *) |
a9f1b85e | 520 | &server->dstaddr, CIFS_PORT); |
7332f2a6 JL |
521 | cifs_reconnect(server); |
522 | csocket = server->ssocket; | |
523 | wake_up(&server->response_q); | |
524 | continue; | |
70ca734a | 525 | } else if (temp != (char) 0) { |
b6b38f70 | 526 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
527 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
528 | length); | |
46810cbf SF |
529 | cifs_reconnect(server); |
530 | csocket = server->ssocket; | |
531 | continue; | |
e4eb295d SF |
532 | } |
533 | ||
534 | /* else we have an SMB response */ | |
fb8c4b14 | 535 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 536 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
537 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
538 | length, pdu_length+4); | |
e4eb295d SF |
539 | cifs_reconnect(server); |
540 | csocket = server->ssocket; | |
541 | wake_up(&server->response_q); | |
542 | continue; | |
fb8c4b14 | 543 | } |
e4eb295d SF |
544 | |
545 | /* else length ok */ | |
546 | reconnect = 0; | |
547 | ||
fb8c4b14 | 548 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 549 | isLargeBuf = true; |
e4eb295d SF |
550 | memcpy(bigbuf, smallbuf, 4); |
551 | smb_buffer = bigbuf; | |
552 | } | |
553 | length = 0; | |
554 | iov.iov_base = 4 + (char *)smb_buffer; | |
555 | iov.iov_len = pdu_length; | |
fb8c4b14 | 556 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
557 | total_read += length) { |
558 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
559 | pdu_length - total_read, 0); | |
522bbe65 | 560 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
561 | /* then will exit */ |
562 | reconnect = 2; | |
563 | break; | |
564 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
565 | cifs_reconnect(server); |
566 | csocket = server->ssocket; | |
fb8c4b14 | 567 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
568 | /* Now we will reread sock */ |
569 | reconnect = 1; | |
570 | break; | |
522bbe65 JL |
571 | } else if (length == -ERESTARTSYS || |
572 | length == -EAGAIN || | |
573 | length == -EINTR) { | |
e4eb295d | 574 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 575 | allowing socket to clear and app |
e4eb295d SF |
576 | threads to set tcpStatus |
577 | CifsNeedReconnect if server hung*/ | |
c18c732e | 578 | length = 0; |
46810cbf | 579 | continue; |
e4eb295d | 580 | } else if (length <= 0) { |
b6b38f70 JP |
581 | cERROR(1, "Received no data, expecting %d", |
582 | pdu_length - total_read); | |
e4eb295d SF |
583 | cifs_reconnect(server); |
584 | csocket = server->ssocket; | |
585 | reconnect = 1; | |
586 | break; | |
46810cbf | 587 | } |
e4eb295d | 588 | } |
fb8c4b14 | 589 | if (reconnect == 2) |
e4eb295d | 590 | break; |
fb8c4b14 | 591 | else if (reconnect == 1) |
e4eb295d | 592 | continue; |
1da177e4 | 593 | |
9587fcff | 594 | total_read += 4; /* account for rfc1002 hdr */ |
50c2f753 | 595 | |
9587fcff | 596 | dump_smb(smb_buffer, total_read); |
71823baf JL |
597 | |
598 | /* | |
599 | * We know that we received enough to get to the MID as we | |
600 | * checked the pdu_length earlier. Now check to see | |
601 | * if the rest of the header is OK. We borrow the length | |
602 | * var for the rest of the loop to avoid a new stack var. | |
603 | * | |
604 | * 48 bytes is enough to display the header and a little bit | |
605 | * into the payload for debugging purposes. | |
606 | */ | |
607 | length = checkSMB(smb_buffer, smb_buffer->Mid, total_read); | |
608 | if (length != 0) | |
9587fcff | 609 | cifs_dump_mem("Bad SMB: ", smb_buffer, |
71823baf | 610 | min_t(unsigned int, total_read, 48)); |
1da177e4 | 611 | |
2b84a36c | 612 | mid_entry = NULL; |
fda35943 SF |
613 | server->lstrp = jiffies; |
614 | ||
e4eb295d | 615 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 616 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
e4eb295d SF |
617 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
618 | ||
146f9f65 JL |
619 | if (mid_entry->mid != smb_buffer->Mid || |
620 | mid_entry->midState != MID_REQUEST_SUBMITTED || | |
621 | mid_entry->command != smb_buffer->Command) { | |
622 | mid_entry = NULL; | |
623 | continue; | |
624 | } | |
625 | ||
626 | if (length == 0 && | |
627 | check2ndT2(smb_buffer, server->maxBuf) > 0) { | |
628 | /* We have a multipart transact2 resp */ | |
629 | isMultiRsp = true; | |
630 | if (mid_entry->resp_buf) { | |
631 | /* merge response - fix up 1st*/ | |
16541ba1 JL |
632 | length = coalesce_t2(smb_buffer, |
633 | mid_entry->resp_buf); | |
634 | if (length > 0) { | |
635 | length = 0; | |
146f9f65 JL |
636 | mid_entry->multiRsp = true; |
637 | break; | |
e4eb295d | 638 | } else { |
16541ba1 JL |
639 | /* all parts received or |
640 | * packet is malformed | |
641 | */ | |
146f9f65 JL |
642 | mid_entry->multiEnd = true; |
643 | goto multi_t2_fnd; | |
644 | } | |
645 | } else { | |
646 | if (!isLargeBuf) { | |
647 | /* | |
648 | * FIXME: switch to already | |
649 | * allocated largebuf? | |
650 | */ | |
651 | cERROR(1, "1st trans2 resp " | |
652 | "needs bigbuf"); | |
653 | } else { | |
654 | /* Have first buffer */ | |
655 | mid_entry->resp_buf = | |
656 | smb_buffer; | |
657 | mid_entry->largeBuf = true; | |
658 | bigbuf = NULL; | |
e4eb295d | 659 | } |
50c2f753 | 660 | } |
146f9f65 JL |
661 | break; |
662 | } | |
663 | mid_entry->resp_buf = smb_buffer; | |
664 | mid_entry->largeBuf = isLargeBuf; | |
e4eb295d | 665 | multi_t2_fnd: |
146f9f65 JL |
666 | if (length == 0) |
667 | mid_entry->midState = MID_RESPONSE_RECEIVED; | |
668 | else | |
669 | mid_entry->midState = MID_RESPONSE_MALFORMED; | |
1047abc1 | 670 | #ifdef CONFIG_CIFS_STATS2 |
146f9f65 | 671 | mid_entry->when_received = jiffies; |
1047abc1 | 672 | #endif |
146f9f65 JL |
673 | list_del_init(&mid_entry->qhead); |
674 | mid_entry->callback(mid_entry); | |
675 | break; | |
1da177e4 | 676 | } |
e4eb295d | 677 | spin_unlock(&GlobalMid_Lock); |
2b84a36c JL |
678 | |
679 | if (mid_entry != NULL) { | |
cd63499c | 680 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 681 | if (!isMultiRsp) { |
cd63499c | 682 | /* smb buffer will be freed by user thread */ |
26f57364 | 683 | if (isLargeBuf) |
cd63499c | 684 | bigbuf = NULL; |
26f57364 | 685 | else |
cd63499c SF |
686 | smallbuf = NULL; |
687 | } | |
71823baf JL |
688 | } else if (length != 0) { |
689 | /* response sanity checks failed */ | |
690 | continue; | |
4b18f2a9 SF |
691 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
692 | !isMultiRsp) { | |
b6b38f70 | 693 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 694 | "NumMids %d", atomic_read(&midCount)); |
50c2f753 | 695 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 696 | sizeof(struct smb_hdr)); |
3979877e SF |
697 | #ifdef CONFIG_CIFS_DEBUG2 |
698 | cifs_dump_detail(smb_buffer); | |
699 | cifs_dump_mids(server); | |
700 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 701 | |
e4eb295d SF |
702 | } |
703 | } /* end while !EXITING */ | |
704 | ||
e7ddee90 | 705 | /* take it off the list, if it's not already */ |
3f9bcca7 | 706 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 707 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 708 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 709 | |
1da177e4 LT |
710 | spin_lock(&GlobalMid_Lock); |
711 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 712 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 713 | wake_up_all(&server->response_q); |
e691b9d1 | 714 | |
31ca3bc3 SF |
715 | /* check if we have blocked requests that need to free */ |
716 | /* Note that cifs_max_pending is normally 50, but | |
717 | can be set at module install time to as little as two */ | |
e691b9d1 | 718 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 719 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
720 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
721 | /* We do not want to set the max_pending too low or we | |
722 | could end up with the counter going negative */ | |
1da177e4 | 723 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 724 | /* Although there should not be any requests blocked on |
1da177e4 | 725 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 726 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
727 | to the same server - they now will see the session is in exit state |
728 | and get out of SendReceive. */ | |
729 | wake_up_all(&server->request_q); | |
730 | /* give those requests time to exit */ | |
b8643e1b | 731 | msleep(125); |
50c2f753 | 732 | |
fb8c4b14 | 733 | if (server->ssocket) { |
1da177e4 LT |
734 | sock_release(csocket); |
735 | server->ssocket = NULL; | |
736 | } | |
fd62cb7e | 737 | /* buffer usually freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
738 | cifs_buf_release(bigbuf); |
739 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 740 | cifs_small_buf_release(smallbuf); |
1da177e4 | 741 | |
9d78315b | 742 | if (!list_empty(&server->pending_mid_q)) { |
1da177e4 | 743 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 744 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
9d78315b | 745 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
2b84a36c JL |
746 | cFYI(1, "Clearing Mid 0x%x - issuing callback", |
747 | mid_entry->mid); | |
748 | list_del_init(&mid_entry->qhead); | |
749 | mid_entry->callback(mid_entry); | |
1da177e4 LT |
750 | } |
751 | spin_unlock(&GlobalMid_Lock); | |
1da177e4 | 752 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 753 | msleep(125); |
1da177e4 LT |
754 | } |
755 | ||
f191401f | 756 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 757 | /* mpx threads have not exited yet give them |
1da177e4 | 758 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
759 | /* due to delays on oplock break requests, we need |
760 | to wait at least 45 seconds before giving up | |
761 | on a request getting a response and going ahead | |
762 | and killing cifsd */ | |
b6b38f70 | 763 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 764 | msleep(46000); |
1da177e4 LT |
765 | /* if threads still have not exited they are probably never |
766 | coming home not much else we can do but free the memory */ | |
767 | } | |
1da177e4 | 768 | |
c359cf3c | 769 | kfree(server->hostname); |
b1c8d2b4 | 770 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 771 | kfree(server); |
93d0ec85 JL |
772 | |
773 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
774 | if (length > 0) |
775 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
776 | GFP_KERNEL); | |
50c2f753 | 777 | |
b1c8d2b4 JL |
778 | /* if server->tsk was NULL then wait for a signal before exiting */ |
779 | if (!task_to_wake) { | |
780 | set_current_state(TASK_INTERRUPTIBLE); | |
781 | while (!signal_pending(current)) { | |
782 | schedule(); | |
783 | set_current_state(TASK_INTERRUPTIBLE); | |
784 | } | |
785 | set_current_state(TASK_RUNNING); | |
786 | } | |
787 | ||
0468a2cf | 788 | module_put_and_exit(0); |
1da177e4 LT |
789 | } |
790 | ||
c359cf3c JL |
791 | /* extract the host portion of the UNC string */ |
792 | static char * | |
793 | extract_hostname(const char *unc) | |
794 | { | |
795 | const char *src; | |
796 | char *dst, *delim; | |
797 | unsigned int len; | |
798 | ||
799 | /* skip double chars at beginning of string */ | |
800 | /* BB: check validity of these bytes? */ | |
801 | src = unc + 2; | |
802 | ||
803 | /* delimiter between hostname and sharename is always '\\' now */ | |
804 | delim = strchr(src, '\\'); | |
805 | if (!delim) | |
806 | return ERR_PTR(-EINVAL); | |
807 | ||
808 | len = delim - src; | |
809 | dst = kmalloc((len + 1), GFP_KERNEL); | |
810 | if (dst == NULL) | |
811 | return ERR_PTR(-ENOMEM); | |
812 | ||
813 | memcpy(dst, src, len); | |
814 | dst[len] = '\0'; | |
815 | ||
816 | return dst; | |
817 | } | |
818 | ||
1da177e4 | 819 | static int |
b946845a | 820 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 821 | struct smb_vol *vol) |
1da177e4 | 822 | { |
4906e50b | 823 | char *value, *data, *end; |
b946845a | 824 | char *mountdata_copy, *options; |
1da177e4 LT |
825 | unsigned int temp_len, i, j; |
826 | char separator[2]; | |
9b9d6b24 JL |
827 | short int override_uid = -1; |
828 | short int override_gid = -1; | |
829 | bool uid_specified = false; | |
830 | bool gid_specified = false; | |
88463999 | 831 | char *nodename = utsname()->nodename; |
1da177e4 LT |
832 | |
833 | separator[0] = ','; | |
50c2f753 | 834 | separator[1] = 0; |
1da177e4 | 835 | |
88463999 JL |
836 | /* |
837 | * does not have to be perfect mapping since field is | |
838 | * informational, only used for servers that do not support | |
839 | * port 445 and it can be overridden at mount time | |
840 | */ | |
1397f2ee JL |
841 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
842 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
843 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
844 | ||
1397f2ee | 845 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
846 | /* null target name indicates to use *SMBSERVR default called name |
847 | if we end up sending RFC1001 session initialize */ | |
848 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
849 | vol->cred_uid = current_uid(); |
850 | vol->linux_uid = current_uid(); | |
a001e5b5 | 851 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
852 | |
853 | /* default to only allowing write access to owner of the mount */ | |
854 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
855 | |
856 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
857 | /* default is always to request posix paths. */ |
858 | vol->posix_paths = 1; | |
a0c9217f JL |
859 | /* default to using server inode numbers where available */ |
860 | vol->server_ino = 1; | |
ac67055e | 861 | |
6d20e840 SJ |
862 | vol->actimeo = CIFS_DEF_ACTIMEO; |
863 | ||
b946845a SF |
864 | if (!mountdata) |
865 | goto cifs_parse_mount_err; | |
866 | ||
867 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
868 | if (!mountdata_copy) | |
869 | goto cifs_parse_mount_err; | |
1da177e4 | 870 | |
b946845a | 871 | options = mountdata_copy; |
4906e50b | 872 | end = options + strlen(options); |
50c2f753 | 873 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 874 | if (options[4] != 0) { |
1da177e4 LT |
875 | separator[0] = options[4]; |
876 | options += 5; | |
877 | } else { | |
b6b38f70 | 878 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
879 | } |
880 | } | |
50c2f753 | 881 | |
1da177e4 LT |
882 | while ((data = strsep(&options, separator)) != NULL) { |
883 | if (!*data) | |
884 | continue; | |
885 | if ((value = strchr(data, '=')) != NULL) | |
886 | *value++ = '\0'; | |
887 | ||
50c2f753 SF |
888 | /* Have to parse this before we parse for "user" */ |
889 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 890 | vol->no_xattr = 0; |
50c2f753 | 891 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
892 | vol->no_xattr = 1; |
893 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 894 | if (!value) { |
1da177e4 LT |
895 | printk(KERN_WARNING |
896 | "CIFS: invalid or missing username\n"); | |
b946845a | 897 | goto cifs_parse_mount_err; |
fb8c4b14 | 898 | } else if (!*value) { |
4b952a9b SF |
899 | /* null user, ie anonymous, authentication */ |
900 | vol->nullauth = 1; | |
1da177e4 | 901 | } |
8727c8a8 SF |
902 | if (strnlen(value, MAX_USERNAME_SIZE) < |
903 | MAX_USERNAME_SIZE) { | |
b946845a SF |
904 | vol->username = kstrdup(value, GFP_KERNEL); |
905 | if (!vol->username) { | |
906 | printk(KERN_WARNING "CIFS: no memory " | |
907 | "for username\n"); | |
908 | goto cifs_parse_mount_err; | |
909 | } | |
1da177e4 LT |
910 | } else { |
911 | printk(KERN_WARNING "CIFS: username too long\n"); | |
b946845a | 912 | goto cifs_parse_mount_err; |
1da177e4 LT |
913 | } |
914 | } else if (strnicmp(data, "pass", 4) == 0) { | |
915 | if (!value) { | |
916 | vol->password = NULL; | |
917 | continue; | |
fb8c4b14 | 918 | } else if (value[0] == 0) { |
1da177e4 LT |
919 | /* check if string begins with double comma |
920 | since that would mean the password really | |
921 | does start with a comma, and would not | |
922 | indicate an empty string */ | |
fb8c4b14 | 923 | if (value[1] != separator[0]) { |
1da177e4 LT |
924 | vol->password = NULL; |
925 | continue; | |
926 | } | |
927 | } | |
928 | temp_len = strlen(value); | |
929 | /* removed password length check, NTLM passwords | |
930 | can be arbitrarily long */ | |
931 | ||
50c2f753 | 932 | /* if comma in password, the string will be |
1da177e4 LT |
933 | prematurely null terminated. Commas in password are |
934 | specified across the cifs mount interface by a double | |
935 | comma ie ,, and a comma used as in other cases ie ',' | |
936 | as a parameter delimiter/separator is single and due | |
937 | to the strsep above is temporarily zeroed. */ | |
938 | ||
939 | /* NB: password legally can have multiple commas and | |
940 | the only illegal character in a password is null */ | |
941 | ||
50c2f753 | 942 | if ((value[temp_len] == 0) && |
4906e50b | 943 | (value + temp_len < end) && |
09d1db5c | 944 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
945 | /* reinsert comma */ |
946 | value[temp_len] = separator[0]; | |
50c2f753 SF |
947 | temp_len += 2; /* move after second comma */ |
948 | while (value[temp_len] != 0) { | |
1da177e4 | 949 | if (value[temp_len] == separator[0]) { |
50c2f753 | 950 | if (value[temp_len+1] == |
09d1db5c SF |
951 | separator[0]) { |
952 | /* skip second comma */ | |
953 | temp_len++; | |
50c2f753 | 954 | } else { |
1da177e4 LT |
955 | /* single comma indicating start |
956 | of next parm */ | |
957 | break; | |
958 | } | |
959 | } | |
960 | temp_len++; | |
961 | } | |
fb8c4b14 | 962 | if (value[temp_len] == 0) { |
1da177e4 LT |
963 | options = NULL; |
964 | } else { | |
965 | value[temp_len] = 0; | |
966 | /* point option to start of next parm */ | |
967 | options = value + temp_len + 1; | |
968 | } | |
50c2f753 | 969 | /* go from value to value + temp_len condensing |
1da177e4 LT |
970 | double commas to singles. Note that this ends up |
971 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 972 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 973 | if (vol->password == NULL) { |
50c2f753 SF |
974 | printk(KERN_WARNING "CIFS: no memory " |
975 | "for password\n"); | |
b946845a | 976 | goto cifs_parse_mount_err; |
433dc24f | 977 | } |
50c2f753 | 978 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 979 | vol->password[j] = value[i]; |
fb8c4b14 | 980 | if (value[i] == separator[0] |
09d1db5c | 981 | && value[i+1] == separator[0]) { |
1da177e4 LT |
982 | /* skip second comma */ |
983 | i++; | |
984 | } | |
985 | } | |
986 | vol->password[j] = 0; | |
987 | } else { | |
e915fc49 | 988 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 989 | if (vol->password == NULL) { |
50c2f753 SF |
990 | printk(KERN_WARNING "CIFS: no memory " |
991 | "for password\n"); | |
b946845a | 992 | goto cifs_parse_mount_err; |
433dc24f | 993 | } |
1da177e4 LT |
994 | strcpy(vol->password, value); |
995 | } | |
58f7f68f JL |
996 | } else if (!strnicmp(data, "ip", 2) || |
997 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
998 | if (!value || !*value) { |
999 | vol->UNCip = NULL; | |
50b64e3b JL |
1000 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
1001 | INET6_ADDRSTRLEN) { | |
b946845a SF |
1002 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
1003 | if (!vol->UNCip) { | |
1004 | printk(KERN_WARNING "CIFS: no memory " | |
1005 | "for UNC IP\n"); | |
1006 | goto cifs_parse_mount_err; | |
1007 | } | |
1da177e4 | 1008 | } else { |
50c2f753 SF |
1009 | printk(KERN_WARNING "CIFS: ip address " |
1010 | "too long\n"); | |
b946845a | 1011 | goto cifs_parse_mount_err; |
1da177e4 | 1012 | } |
50c2f753 SF |
1013 | } else if (strnicmp(data, "sec", 3) == 0) { |
1014 | if (!value || !*value) { | |
b6b38f70 | 1015 | cERROR(1, "no security value specified"); |
50c2f753 SF |
1016 | continue; |
1017 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
1018 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 1019 | CIFSSEC_MUST_SIGN; |
bf820679 | 1020 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
1021 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
1022 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 1023 | cERROR(1, "Krb5 cifs privacy not supported"); |
b946845a | 1024 | goto cifs_parse_mount_err; |
bf820679 | 1025 | } else if (strnicmp(value, "krb5", 4) == 0) { |
750d1151 | 1026 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
1027 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
1028 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1029 | CIFSSEC_MUST_SIGN; | |
1030 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1031 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1032 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1033 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1034 | CIFSSEC_MUST_SIGN; |
bf820679 | 1035 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1036 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1037 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1038 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1039 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1040 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1041 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1042 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1043 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1044 | /* BB is there a better way to do this? */ |
750d1151 | 1045 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1046 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1047 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1048 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1049 | #endif |
bf820679 | 1050 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1051 | vol->nullauth = 1; |
50c2f753 | 1052 | } else { |
b6b38f70 | 1053 | cERROR(1, "bad security option: %s", value); |
b946845a | 1054 | goto cifs_parse_mount_err; |
50c2f753 | 1055 | } |
1cb06d0b SF |
1056 | } else if (strnicmp(data, "vers", 3) == 0) { |
1057 | if (!value || !*value) { | |
1058 | cERROR(1, "no protocol version specified" | |
1059 | " after vers= mount option"); | |
1060 | } else if ((strnicmp(value, "cifs", 4) == 0) || | |
1061 | (strnicmp(value, "1", 1) == 0)) { | |
1062 | /* this is the default */ | |
1063 | continue; | |
1cb06d0b | 1064 | } |
1da177e4 LT |
1065 | } else if ((strnicmp(data, "unc", 3) == 0) |
1066 | || (strnicmp(data, "target", 6) == 0) | |
1067 | || (strnicmp(data, "path", 4) == 0)) { | |
1068 | if (!value || !*value) { | |
50c2f753 SF |
1069 | printk(KERN_WARNING "CIFS: invalid path to " |
1070 | "network resource\n"); | |
b946845a | 1071 | goto cifs_parse_mount_err; |
1da177e4 LT |
1072 | } |
1073 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1074 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1075 | if (vol->UNC == NULL) |
b946845a | 1076 | goto cifs_parse_mount_err; |
50c2f753 | 1077 | strcpy(vol->UNC, value); |
1da177e4 LT |
1078 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1079 | vol->UNC[0] = '\\'; | |
1080 | vol->UNC[1] = '\\'; | |
50c2f753 | 1081 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1082 | printk(KERN_WARNING |
50c2f753 SF |
1083 | "CIFS: UNC Path does not begin " |
1084 | "with // or \\\\ \n"); | |
b946845a | 1085 | goto cifs_parse_mount_err; |
1da177e4 LT |
1086 | } |
1087 | } else { | |
1088 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1089 | goto cifs_parse_mount_err; |
1da177e4 LT |
1090 | } |
1091 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1092 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1093 | if (!value || !*value) { | |
1094 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
b946845a | 1095 | goto cifs_parse_mount_err; |
1da177e4 LT |
1096 | } |
1097 | /* BB are there cases in which a comma can be valid in | |
1098 | a domain name and need special handling? */ | |
3979877e | 1099 | if (strnlen(value, 256) < 256) { |
b946845a SF |
1100 | vol->domainname = kstrdup(value, GFP_KERNEL); |
1101 | if (!vol->domainname) { | |
1102 | printk(KERN_WARNING "CIFS: no memory " | |
1103 | "for domainname\n"); | |
1104 | goto cifs_parse_mount_err; | |
1105 | } | |
b6b38f70 | 1106 | cFYI(1, "Domain name set"); |
1da177e4 | 1107 | } else { |
50c2f753 SF |
1108 | printk(KERN_WARNING "CIFS: domain name too " |
1109 | "long\n"); | |
b946845a | 1110 | goto cifs_parse_mount_err; |
1da177e4 | 1111 | } |
3eb9a889 BG |
1112 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1113 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1114 | ||
1115 | if (!value || !*value) { | |
1116 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1117 | " not specified.\n"); | |
b946845a | 1118 | goto cifs_parse_mount_err; |
3eb9a889 BG |
1119 | } |
1120 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1121 | value, strlen(value)); | |
b235f371 | 1122 | if (i == 0) { |
3eb9a889 BG |
1123 | printk(KERN_WARNING "CIFS: Could not parse" |
1124 | " srcaddr: %s\n", | |
1125 | value); | |
b946845a | 1126 | goto cifs_parse_mount_err; |
3eb9a889 | 1127 | } |
50c2f753 SF |
1128 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1129 | if (!value || !*value) { | |
1130 | printk(KERN_WARNING | |
1131 | "CIFS: invalid path prefix\n"); | |
b946845a | 1132 | goto cifs_parse_mount_err; |
50c2f753 SF |
1133 | } |
1134 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1135 | if (value[0] != '/') |
2fe87f02 | 1136 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1137 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1138 | if (vol->prepath == NULL) | |
b946845a | 1139 | goto cifs_parse_mount_err; |
4523cc30 | 1140 | if (value[0] != '/') { |
2fe87f02 | 1141 | vol->prepath[0] = '/'; |
50c2f753 | 1142 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1143 | } else |
50c2f753 | 1144 | strcpy(vol->prepath, value); |
b6b38f70 | 1145 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1146 | } else { |
1147 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
b946845a | 1148 | goto cifs_parse_mount_err; |
50c2f753 | 1149 | } |
1da177e4 LT |
1150 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1151 | if (!value || !*value) { | |
63135e08 SF |
1152 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1153 | "specified\n"); | |
b946845a | 1154 | goto cifs_parse_mount_err; |
1da177e4 LT |
1155 | } |
1156 | if (strnlen(value, 65) < 65) { | |
b946845a SF |
1157 | if (strnicmp(value, "default", 7)) { |
1158 | vol->iocharset = kstrdup(value, | |
1159 | GFP_KERNEL); | |
1160 | ||
1161 | if (!vol->iocharset) { | |
1162 | printk(KERN_WARNING "CIFS: no " | |
1163 | "memory for" | |
1164 | "charset\n"); | |
1165 | goto cifs_parse_mount_err; | |
1166 | } | |
1167 | } | |
50c2f753 SF |
1168 | /* if iocharset not set then load_nls_default |
1169 | is used by caller */ | |
b6b38f70 | 1170 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1171 | } else { |
63135e08 SF |
1172 | printk(KERN_WARNING "CIFS: iocharset name " |
1173 | "too long.\n"); | |
b946845a | 1174 | goto cifs_parse_mount_err; |
1da177e4 | 1175 | } |
9b9d6b24 JL |
1176 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1177 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1178 | uid_specified = true; | |
bd763319 JL |
1179 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1180 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1181 | } else if (!strnicmp(data, "forceuid", 8)) { |
1182 | override_uid = 1; | |
1183 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1184 | override_uid = 0; | |
1185 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1186 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1187 | gid_specified = true; | |
1188 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1189 | override_gid = 1; | |
1190 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1191 | override_gid = 0; | |
1da177e4 LT |
1192 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1193 | if (value && *value) { | |
1194 | vol->file_mode = | |
1195 | simple_strtoul(value, &value, 0); | |
1196 | } | |
1197 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1198 | if (value && *value) { | |
1199 | vol->dir_mode = | |
1200 | simple_strtoul(value, &value, 0); | |
1201 | } | |
1202 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1203 | if (value && *value) { | |
1204 | vol->dir_mode = | |
1205 | simple_strtoul(value, &value, 0); | |
1206 | } | |
1207 | } else if (strnicmp(data, "port", 4) == 0) { | |
1208 | if (value && *value) { | |
1209 | vol->port = | |
1210 | simple_strtoul(value, &value, 0); | |
1211 | } | |
1212 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1213 | if (value && *value) { | |
1214 | vol->rsize = | |
1215 | simple_strtoul(value, &value, 0); | |
1216 | } | |
1217 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1218 | if (value && *value) { | |
1219 | vol->wsize = | |
1220 | simple_strtoul(value, &value, 0); | |
1221 | } | |
1222 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1223 | if (!value || !*value) { |
b6b38f70 | 1224 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1225 | continue; |
1226 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1227 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1228 | } |
1229 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1230 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1231 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1232 | } else { |
1397f2ee JL |
1233 | memset(vol->source_rfc1001_name, 0x20, |
1234 | RFC1001_NAME_LEN); | |
1235 | /* | |
1236 | * FIXME: are there cases in which a comma can | |
1237 | * be valid in workstation netbios name (and | |
1238 | * need special handling)? | |
1239 | */ | |
1240 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1241 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1242 | if (value[i] == 0) |
1da177e4 | 1243 | break; |
1397f2ee | 1244 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1245 | } |
1246 | /* The string has 16th byte zero still from | |
1247 | set at top of the function */ | |
1397f2ee | 1248 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1249 | printk(KERN_WARNING "CIFS: netbiosname" |
1250 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1251 | } |
1252 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1253 | /* servernetbiosname specified override *SMBSERVER */ | |
1254 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1255 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1256 | } else { |
1257 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1258 | memset(vol->target_rfc1001_name, 0x20, |
1259 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1260 | |
50c2f753 | 1261 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1262 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1263 | valid in this workstation netbios name |
1264 | (and need special handling)? */ | |
a10faeb2 | 1265 | |
50c2f753 SF |
1266 | /* user or mount helper must uppercase |
1267 | the netbiosname */ | |
1268 | if (value[i] == 0) | |
a10faeb2 SF |
1269 | break; |
1270 | else | |
50c2f753 SF |
1271 | vol->target_rfc1001_name[i] = |
1272 | value[i]; | |
a10faeb2 SF |
1273 | } |
1274 | /* The string has 16th byte zero still from | |
1275 | set at top of the function */ | |
1397f2ee | 1276 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1277 | printk(KERN_WARNING "CIFS: server net" |
1278 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1279 | } |
6d20e840 SJ |
1280 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1281 | if (value && *value) { | |
1282 | vol->actimeo = HZ * simple_strtoul(value, | |
1283 | &value, 0); | |
1284 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1285 | cERROR(1, "CIFS: attribute cache" | |
1286 | "timeout too large"); | |
b946845a | 1287 | goto cifs_parse_mount_err; |
6d20e840 SJ |
1288 | } |
1289 | } | |
1da177e4 LT |
1290 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1291 | /* ignore */ | |
1292 | } else if (strnicmp(data, "version", 3) == 0) { | |
1293 | /* ignore */ | |
50c2f753 | 1294 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1295 | /* ignore */ |
71a394fa SF |
1296 | } else if (strnicmp(data, "rw", 2) == 0) { |
1297 | /* ignore */ | |
1298 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1299 | /* ignore */ | |
edf1ae40 SF |
1300 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1301 | vol->noblocksnd = 1; | |
1302 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1303 | vol->noautotune = 1; | |
1da177e4 LT |
1304 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1305 | (strnicmp(data, "nosuid", 6) == 0) || | |
1306 | (strnicmp(data, "exec", 4) == 0) || | |
1307 | (strnicmp(data, "noexec", 6) == 0) || | |
1308 | (strnicmp(data, "nodev", 5) == 0) || | |
1309 | (strnicmp(data, "noauto", 6) == 0) || | |
1310 | (strnicmp(data, "dev", 3) == 0)) { | |
1311 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1312 | uses these opts to set flags, and the flags are read |
1313 | by the kernel vfs layer before we get here (ie | |
1314 | before read super) so there is no point trying to | |
1315 | parse these options again and set anything and it | |
1316 | is ok to just ignore them */ | |
1da177e4 | 1317 | continue; |
1da177e4 LT |
1318 | } else if (strnicmp(data, "hard", 4) == 0) { |
1319 | vol->retry = 1; | |
1320 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1321 | vol->retry = 0; | |
1322 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1323 | vol->noperm = 0; | |
1324 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1325 | vol->noperm = 1; | |
6a0b4824 SF |
1326 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1327 | vol->remap = 1; | |
1328 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1329 | vol->remap = 0; | |
50c2f753 SF |
1330 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1331 | vol->sfu_emul = 1; | |
1332 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1333 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1334 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1335 | vol->nodfs = 1; | |
ac67055e JA |
1336 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1337 | vol->posix_paths = 1; | |
1338 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1339 | vol->posix_paths = 0; | |
c18c842b SF |
1340 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1341 | vol->no_linux_ext = 1; | |
1342 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1343 | vol->no_linux_ext = 1; | |
50c2f753 | 1344 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1345 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1346 | vol->nocase = 1; |
f636a348 JL |
1347 | } else if (strnicmp(data, "mand", 4) == 0) { |
1348 | /* ignore */ | |
1349 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1350 | /* ignore */ | |
1351 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1352 | /* ignore */ | |
c46fa8ac SF |
1353 | } else if (strnicmp(data, "brl", 3) == 0) { |
1354 | vol->nobrl = 0; | |
50c2f753 | 1355 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1356 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1357 | vol->nobrl = 1; |
d3485d37 SF |
1358 | /* turn off mandatory locking in mode |
1359 | if remote locking is turned off since the | |
1360 | local vfs will do advisory */ | |
50c2f753 SF |
1361 | if (vol->file_mode == |
1362 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1363 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1364 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1365 | /* will take the shorter form "forcemand" as well */ | |
1366 | /* This mount option will force use of mandatory | |
1367 | (DOS/Windows style) byte range locks, instead of | |
1368 | using posix advisory byte range locks, even if the | |
1369 | Unix extensions are available and posix locks would | |
1370 | be supported otherwise. If Unix extensions are not | |
1371 | negotiated this has no effect since mandatory locks | |
1372 | would be used (mandatory locks is all that those | |
1373 | those servers support) */ | |
1374 | vol->mand_lock = 1; | |
1da177e4 LT |
1375 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1376 | vol->setuids = 1; | |
1377 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1378 | vol->setuids = 0; | |
d0a9c078 JL |
1379 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1380 | vol->dynperm = true; | |
1381 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1382 | vol->dynperm = false; | |
1da177e4 LT |
1383 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1384 | vol->retry = 0; | |
1385 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1386 | vol->retry = 1; | |
1387 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1388 | vol->intr = 0; | |
1389 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1390 | vol->intr = 1; | |
be652445 SF |
1391 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1392 | vol->nostrictsync = 1; | |
1393 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1394 | vol->nostrictsync = 0; | |
50c2f753 | 1395 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1396 | vol->server_ino = 1; |
50c2f753 | 1397 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1398 | vol->server_ino = 0; |
50c2f753 | 1399 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1400 | vol->cifs_acl = 1; |
1401 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1402 | vol->cifs_acl = 0; | |
50c2f753 | 1403 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1404 | vol->no_psx_acl = 0; |
50c2f753 | 1405 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1406 | vol->no_psx_acl = 1; |
84210e91 SF |
1407 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1408 | vol->local_lease = 1; | |
50c2f753 | 1409 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1410 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1411 | } else if (strnicmp(data, "seal", 4) == 0) { |
1412 | /* we do not do the following in secFlags because seal | |
1413 | is a per tree connection (mount) not a per socket | |
1414 | or per-smb connection option in the protocol */ | |
1415 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1416 | vol->seal = 1; | |
50c2f753 | 1417 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1418 | vol->direct_io = 1; |
50c2f753 | 1419 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1420 | vol->direct_io = 1; |
d39454ff PS |
1421 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1422 | vol->strict_io = 1; | |
1da177e4 | 1423 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1424 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1425 | "supported. Instead set " | |
1426 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1427 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d SJ |
1428 | #ifndef CONFIG_CIFS_FSCACHE |
1429 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" | |
1430 | "kernel config option set"); | |
b946845a | 1431 | goto cifs_parse_mount_err; |
607a569d | 1432 | #endif |
fa1df75d | 1433 | vol->fsc = true; |
736a3320 SM |
1434 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1435 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1436 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1437 | vol->multiuser = true; | |
1da177e4 | 1438 | } else |
50c2f753 SF |
1439 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1440 | data); | |
1da177e4 LT |
1441 | } |
1442 | if (vol->UNC == NULL) { | |
4523cc30 | 1443 | if (devname == NULL) { |
50c2f753 SF |
1444 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1445 | "target\n"); | |
b946845a | 1446 | goto cifs_parse_mount_err; |
1da177e4 LT |
1447 | } |
1448 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1449 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1450 | if (vol->UNC == NULL) |
b946845a | 1451 | goto cifs_parse_mount_err; |
50c2f753 | 1452 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1453 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1454 | vol->UNC[0] = '\\'; | |
1455 | vol->UNC[1] = '\\'; | |
1456 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1457 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1458 | "begin with // or \\\\ \n"); | |
b946845a | 1459 | goto cifs_parse_mount_err; |
1da177e4 | 1460 | } |
7c5e628f IM |
1461 | value = strpbrk(vol->UNC+2, "/\\"); |
1462 | if (value) | |
1463 | *value = '\\'; | |
1da177e4 LT |
1464 | } else { |
1465 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1466 | goto cifs_parse_mount_err; |
1da177e4 LT |
1467 | } |
1468 | } | |
0eb8a132 JL |
1469 | |
1470 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1471 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1472 | "authentication!"); | |
b946845a | 1473 | goto cifs_parse_mount_err; |
0eb8a132 JL |
1474 | } |
1475 | ||
fb8c4b14 | 1476 | if (vol->UNCip == NULL) |
1da177e4 LT |
1477 | vol->UNCip = &vol->UNC[2]; |
1478 | ||
9b9d6b24 JL |
1479 | if (uid_specified) |
1480 | vol->override_uid = override_uid; | |
1481 | else if (override_uid == 1) | |
1482 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1483 | "specified with no uid= option.\n"); | |
1484 | ||
1485 | if (gid_specified) | |
1486 | vol->override_gid = override_gid; | |
1487 | else if (override_gid == 1) | |
1488 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1489 | "specified with no gid= option.\n"); | |
1490 | ||
b946845a | 1491 | kfree(mountdata_copy); |
1da177e4 | 1492 | return 0; |
b946845a SF |
1493 | |
1494 | cifs_parse_mount_err: | |
1495 | kfree(mountdata_copy); | |
1496 | return 1; | |
1da177e4 LT |
1497 | } |
1498 | ||
3eb9a889 BG |
1499 | /** Returns true if srcaddr isn't specified and rhs isn't |
1500 | * specified, or if srcaddr is specified and | |
1501 | * matches the IP address of the rhs argument. | |
1502 | */ | |
1503 | static bool | |
1504 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1505 | { | |
1506 | switch (srcaddr->sa_family) { | |
1507 | case AF_UNSPEC: | |
1508 | return (rhs->sa_family == AF_UNSPEC); | |
1509 | case AF_INET: { | |
1510 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1511 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1512 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1513 | } | |
1514 | case AF_INET6: { | |
1515 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1516 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1517 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1518 | } | |
1519 | default: | |
1520 | WARN_ON(1); | |
1521 | return false; /* don't expect to be here */ | |
1522 | } | |
1523 | } | |
1524 | ||
4b886136 PS |
1525 | /* |
1526 | * If no port is specified in addr structure, we try to match with 445 port | |
1527 | * and if it fails - with 139 ports. It should be called only if address | |
1528 | * families of server and addr are equal. | |
1529 | */ | |
1530 | static bool | |
1531 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1532 | { | |
6da97910 | 1533 | __be16 port, *sport; |
4b886136 PS |
1534 | |
1535 | switch (addr->sa_family) { | |
1536 | case AF_INET: | |
1537 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1538 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1539 | break; | |
1540 | case AF_INET6: | |
1541 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1542 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1543 | break; | |
1544 | default: | |
1545 | WARN_ON(1); | |
1546 | return false; | |
1547 | } | |
1548 | ||
1549 | if (!port) { | |
1550 | port = htons(CIFS_PORT); | |
1551 | if (port == *sport) | |
1552 | return true; | |
1553 | ||
1554 | port = htons(RFC1001_PORT); | |
1555 | } | |
1556 | ||
1557 | return port == *sport; | |
1558 | } | |
3eb9a889 | 1559 | |
4515148e | 1560 | static bool |
3eb9a889 BG |
1561 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1562 | struct sockaddr *srcaddr) | |
4515148e | 1563 | { |
4515148e | 1564 | switch (addr->sa_family) { |
a9f1b85e PS |
1565 | case AF_INET: { |
1566 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1567 | struct sockaddr_in *srv_addr4 = | |
1568 | (struct sockaddr_in *)&server->dstaddr; | |
1569 | ||
1570 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1571 | return false; |
4515148e | 1572 | break; |
a9f1b85e PS |
1573 | } |
1574 | case AF_INET6: { | |
1575 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1576 | struct sockaddr_in6 *srv_addr6 = | |
1577 | (struct sockaddr_in6 *)&server->dstaddr; | |
1578 | ||
4515148e | 1579 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1580 | &srv_addr6->sin6_addr)) |
4515148e | 1581 | return false; |
a9f1b85e | 1582 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1583 | return false; |
4515148e JL |
1584 | break; |
1585 | } | |
a9f1b85e PS |
1586 | default: |
1587 | WARN_ON(1); | |
1588 | return false; /* don't expect to be here */ | |
1589 | } | |
4515148e | 1590 | |
3eb9a889 BG |
1591 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1592 | return false; | |
1593 | ||
4515148e JL |
1594 | return true; |
1595 | } | |
1596 | ||
daf5b0b6 JL |
1597 | static bool |
1598 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1599 | { | |
1600 | unsigned int secFlags; | |
1601 | ||
1602 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1603 | secFlags = vol->secFlg; | |
1604 | else | |
1605 | secFlags = global_secflags | vol->secFlg; | |
1606 | ||
1607 | switch (server->secType) { | |
1608 | case LANMAN: | |
1609 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1610 | return false; | |
1611 | break; | |
1612 | case NTLMv2: | |
1613 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1614 | return false; | |
1615 | break; | |
1616 | case NTLM: | |
1617 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1618 | return false; | |
1619 | break; | |
1620 | case Kerberos: | |
1621 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1622 | return false; | |
1623 | break; | |
1624 | case RawNTLMSSP: | |
1625 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1626 | return false; | |
1627 | break; | |
1628 | default: | |
1629 | /* shouldn't happen */ | |
1630 | return false; | |
1631 | } | |
1632 | ||
25985edc | 1633 | /* now check if signing mode is acceptable */ |
daf5b0b6 JL |
1634 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
1635 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1636 | return false; | |
1637 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1638 | (server->secMode & | |
1639 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1640 | return false; | |
1641 | ||
1642 | return true; | |
1643 | } | |
1644 | ||
37bb04e5 PS |
1645 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1646 | struct smb_vol *vol) | |
1647 | { | |
1648 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
1649 | return 0; | |
1650 | ||
1651 | if (!match_address(server, addr, | |
1652 | (struct sockaddr *)&vol->srcaddr)) | |
1653 | return 0; | |
1654 | ||
1655 | if (!match_port(server, addr)) | |
1656 | return 0; | |
1657 | ||
1658 | if (!match_security(server, vol)) | |
1659 | return 0; | |
1660 | ||
1661 | return 1; | |
1662 | } | |
1663 | ||
e7ddee90 | 1664 | static struct TCP_Server_Info * |
daf5b0b6 | 1665 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1666 | { |
e7ddee90 | 1667 | struct TCP_Server_Info *server; |
e7ddee90 | 1668 | |
3f9bcca7 | 1669 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1670 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 1671 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
1672 | continue; |
1673 | ||
e7ddee90 | 1674 | ++server->srv_count; |
3f9bcca7 | 1675 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1676 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1677 | return server; |
1da177e4 | 1678 | } |
3f9bcca7 | 1679 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1680 | return NULL; |
1681 | } | |
1b20d672 | 1682 | |
14fbf50d | 1683 | static void |
e7ddee90 | 1684 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1685 | { |
e7ddee90 | 1686 | struct task_struct *task; |
1b20d672 | 1687 | |
3f9bcca7 | 1688 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1689 | if (--server->srv_count > 0) { |
3f9bcca7 | 1690 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1691 | return; |
1da177e4 | 1692 | } |
1b20d672 | 1693 | |
f1d0c998 RL |
1694 | put_net(cifs_net_ns(server)); |
1695 | ||
e7ddee90 | 1696 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1697 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1698 | |
c74093b6 JL |
1699 | cancel_delayed_work_sync(&server->echo); |
1700 | ||
e7ddee90 JL |
1701 | spin_lock(&GlobalMid_Lock); |
1702 | server->tcpStatus = CifsExiting; | |
1703 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1704 | |
d2b91521 | 1705 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1706 | cifs_fscache_release_client_cookie(server); |
1707 | ||
21e73393 SP |
1708 | kfree(server->session_key.response); |
1709 | server->session_key.response = NULL; | |
1710 | server->session_key.len = 0; | |
1711 | ||
e7ddee90 JL |
1712 | task = xchg(&server->tsk, NULL); |
1713 | if (task) | |
1714 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1715 | } |
1716 | ||
63c038c2 JL |
1717 | static struct TCP_Server_Info * |
1718 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1719 | { | |
1720 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1721 | struct sockaddr_storage addr; |
63c038c2 JL |
1722 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1723 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1724 | int rc; | |
1725 | ||
a9ac49d3 | 1726 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1727 | |
b6b38f70 | 1728 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1729 | |
1e68b2b2 | 1730 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1731 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1732 | volume_info->UNCip, | |
67b7626a | 1733 | strlen(volume_info->UNCip), |
50d97160 | 1734 | volume_info->port); |
1e68b2b2 | 1735 | if (!rc) { |
63c038c2 JL |
1736 | /* we failed translating address */ |
1737 | rc = -EINVAL; | |
1738 | goto out_err; | |
1739 | } | |
63c038c2 JL |
1740 | } else if (volume_info->UNCip) { |
1741 | /* BB using ip addr as tcp_ses name to connect to the | |
1742 | DFS root below */ | |
b6b38f70 | 1743 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1744 | rc = -EINVAL; |
1745 | goto out_err; | |
1746 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1747 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1748 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1749 | rc = -EINVAL; |
1750 | goto out_err; | |
1751 | } | |
1752 | ||
1753 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1754 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1755 | if (tcp_ses) |
1756 | return tcp_ses; | |
1757 | ||
1758 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1759 | if (!tcp_ses) { | |
1760 | rc = -ENOMEM; | |
1761 | goto out_err; | |
1762 | } | |
1763 | ||
d2b91521 SP |
1764 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1765 | if (rc) { | |
1766 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1767 | goto out_err; | |
1768 | } | |
1769 | ||
f1d0c998 | 1770 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1771 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1772 | if (IS_ERR(tcp_ses->hostname)) { | |
1773 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1774 | goto out_err_crypto_release; |
63c038c2 JL |
1775 | } |
1776 | ||
1777 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1778 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1779 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1780 | atomic_set(&tcp_ses->inFlight, 0); |
1781 | init_waitqueue_head(&tcp_ses->response_q); | |
1782 | init_waitqueue_head(&tcp_ses->request_q); | |
1783 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1784 | mutex_init(&tcp_ses->srv_mutex); | |
1785 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1786 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1787 | memcpy(tcp_ses->server_RFC1001_name, | |
1788 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1789 | tcp_ses->session_estab = false; |
63c038c2 | 1790 | tcp_ses->sequence_number = 0; |
fda35943 | 1791 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1792 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1793 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1794 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1795 | |
1796 | /* | |
1797 | * at this point we are the only ones with the pointer | |
1798 | * to the struct since the kernel thread not created yet | |
1799 | * no need to spinlock this init of tcpStatus or srv_count | |
1800 | */ | |
1801 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1802 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1803 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1804 | ++tcp_ses->srv_count; |
1805 | ||
a9ac49d3 | 1806 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1807 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1808 | /* BB should we allow ipv6 on port 139? */ |
1809 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1810 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1811 | sizeof(struct sockaddr_in6)); | |
1812 | } else | |
1813 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1814 | sizeof(struct sockaddr_in)); | |
1815 | ||
1816 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1817 | if (rc < 0) { |
b6b38f70 | 1818 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1819 | goto out_err_crypto_release; |
63c038c2 JL |
1820 | } |
1821 | ||
1822 | /* | |
1823 | * since we're in a cifs function already, we know that | |
1824 | * this will succeed. No need for try_module_get(). | |
1825 | */ | |
1826 | __module_get(THIS_MODULE); | |
1827 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1828 | tcp_ses, "cifsd"); | |
1829 | if (IS_ERR(tcp_ses->tsk)) { | |
1830 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1831 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1832 | module_put(THIS_MODULE); |
f7c5445a | 1833 | goto out_err_crypto_release; |
63c038c2 | 1834 | } |
fd88ce93 | 1835 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1836 | |
1837 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1838 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1839 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1840 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1841 | |
488f1d2d SJ |
1842 | cifs_fscache_get_client_cookie(tcp_ses); |
1843 | ||
c74093b6 JL |
1844 | /* queue echo request delayed work */ |
1845 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1846 | ||
63c038c2 JL |
1847 | return tcp_ses; |
1848 | ||
f7c5445a | 1849 | out_err_crypto_release: |
d2b91521 SP |
1850 | cifs_crypto_shash_release(tcp_ses); |
1851 | ||
f1d0c998 RL |
1852 | put_net(cifs_net_ns(tcp_ses)); |
1853 | ||
63c038c2 JL |
1854 | out_err: |
1855 | if (tcp_ses) { | |
8347a5cd SF |
1856 | if (!IS_ERR(tcp_ses->hostname)) |
1857 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1858 | if (tcp_ses->ssocket) |
1859 | sock_release(tcp_ses->ssocket); | |
1860 | kfree(tcp_ses); | |
1861 | } | |
1862 | return ERR_PTR(rc); | |
1863 | } | |
1864 | ||
37bb04e5 PS |
1865 | static int match_session(struct cifsSesInfo *ses, struct smb_vol *vol) |
1866 | { | |
1867 | switch (ses->server->secType) { | |
1868 | case Kerberos: | |
1869 | if (vol->cred_uid != ses->cred_uid) | |
1870 | return 0; | |
1871 | break; | |
1872 | default: | |
1873 | /* anything else takes username/password */ | |
1874 | if (ses->user_name == NULL) | |
1875 | return 0; | |
1876 | if (strncmp(ses->user_name, vol->username, | |
1877 | MAX_USERNAME_SIZE)) | |
1878 | return 0; | |
1879 | if (strlen(vol->username) != 0 && | |
1880 | ses->password != NULL && | |
1881 | strncmp(ses->password, | |
1882 | vol->password ? vol->password : "", | |
1883 | MAX_PASSWORD_SIZE)) | |
1884 | return 0; | |
1885 | } | |
1886 | return 1; | |
1887 | } | |
1888 | ||
14fbf50d | 1889 | static struct cifsSesInfo * |
4ff67b72 | 1890 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1891 | { |
14fbf50d | 1892 | struct cifsSesInfo *ses; |
dea570e0 | 1893 | |
3f9bcca7 | 1894 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 1895 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
1896 | if (!match_session(ses, vol)) |
1897 | continue; | |
14fbf50d | 1898 | ++ses->ses_count; |
3f9bcca7 | 1899 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1900 | return ses; |
1901 | } | |
3f9bcca7 | 1902 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1903 | return NULL; |
1904 | } | |
dea570e0 | 1905 | |
14fbf50d JL |
1906 | static void |
1907 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1908 | { | |
1909 | int xid; | |
1910 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1911 | |
36988c76 | 1912 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1913 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1914 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1915 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1916 | return; |
1917 | } | |
dea570e0 | 1918 | |
14fbf50d | 1919 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1920 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1921 | |
14fbf50d JL |
1922 | if (ses->status == CifsGood) { |
1923 | xid = GetXid(); | |
1924 | CIFSSMBLogoff(xid, ses); | |
1925 | _FreeXid(xid); | |
1926 | } | |
1927 | sesInfoFree(ses); | |
1928 | cifs_put_tcp_session(server); | |
1929 | } | |
dea570e0 | 1930 | |
d9b94201 SF |
1931 | static bool warned_on_ntlm; /* globals init to false automatically */ |
1932 | ||
36988c76 JL |
1933 | static struct cifsSesInfo * |
1934 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1935 | { | |
1936 | int rc = -ENOMEM, xid; | |
1937 | struct cifsSesInfo *ses; | |
a9f1b85e PS |
1938 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1939 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1940 | |
1941 | xid = GetXid(); | |
1942 | ||
4ff67b72 | 1943 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1944 | if (ses) { |
1945 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1946 | ||
36988c76 | 1947 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1948 | rc = cifs_negotiate_protocol(xid, ses); |
1949 | if (rc) { | |
1950 | mutex_unlock(&ses->session_mutex); | |
1951 | /* problem -- put our ses reference */ | |
1952 | cifs_put_smb_ses(ses); | |
1953 | FreeXid(xid); | |
1954 | return ERR_PTR(rc); | |
1955 | } | |
36988c76 JL |
1956 | if (ses->need_reconnect) { |
1957 | cFYI(1, "Session needs reconnect"); | |
1958 | rc = cifs_setup_session(xid, ses, | |
1959 | volume_info->local_nls); | |
1960 | if (rc) { | |
1961 | mutex_unlock(&ses->session_mutex); | |
1962 | /* problem -- put our reference */ | |
1963 | cifs_put_smb_ses(ses); | |
1964 | FreeXid(xid); | |
1965 | return ERR_PTR(rc); | |
1966 | } | |
1967 | } | |
1968 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1969 | |
1970 | /* existing SMB ses has a server reference already */ | |
1971 | cifs_put_tcp_session(server); | |
36988c76 JL |
1972 | FreeXid(xid); |
1973 | return ses; | |
1974 | } | |
1975 | ||
1976 | cFYI(1, "Existing smb sess not found"); | |
1977 | ses = sesInfoAlloc(); | |
1978 | if (ses == NULL) | |
1979 | goto get_ses_fail; | |
1980 | ||
1981 | /* new SMB session uses our server ref */ | |
1982 | ses->server = server; | |
a9f1b85e PS |
1983 | if (server->dstaddr.ss_family == AF_INET6) |
1984 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 1985 | else |
a9f1b85e | 1986 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 1987 | |
8727c8a8 SF |
1988 | if (volume_info->username) { |
1989 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
1990 | if (!ses->user_name) | |
1991 | goto get_ses_fail; | |
1992 | } | |
36988c76 JL |
1993 | |
1994 | /* volume_info->password freed at unmount */ | |
1995 | if (volume_info->password) { | |
1996 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1997 | if (!ses->password) | |
1998 | goto get_ses_fail; | |
1999 | } | |
2000 | if (volume_info->domainname) { | |
d3686d54 SP |
2001 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2002 | if (!ses->domainName) | |
2003 | goto get_ses_fail; | |
36988c76 | 2004 | } |
3e4b3e1f | 2005 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2006 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2007 | |
2008 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2009 | supported for many years, time to update default security mechanism */ | |
2010 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2011 | warned_on_ntlm = true; | |
2012 | cERROR(1, "default security mechanism requested. The default " | |
2013 | "security mechanism will be upgraded from ntlm to " | |
2014 | "ntlmv2 in kernel release 2.6.41"); | |
2015 | } | |
36988c76 JL |
2016 | ses->overrideSecFlg = volume_info->secFlg; |
2017 | ||
2018 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2019 | rc = cifs_negotiate_protocol(xid, ses); |
2020 | if (!rc) | |
2021 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2022 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2023 | if (rc) |
36988c76 JL |
2024 | goto get_ses_fail; |
2025 | ||
2026 | /* success, put it on the list */ | |
3f9bcca7 | 2027 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2028 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2029 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2030 | |
2031 | FreeXid(xid); | |
2032 | return ses; | |
2033 | ||
2034 | get_ses_fail: | |
2035 | sesInfoFree(ses); | |
2036 | FreeXid(xid); | |
2037 | return ERR_PTR(rc); | |
2038 | } | |
2039 | ||
37bb04e5 PS |
2040 | static int match_tcon(struct cifsTconInfo *tcon, const char *unc) |
2041 | { | |
2042 | if (tcon->tidStatus == CifsExiting) | |
2043 | return 0; | |
2044 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2045 | return 0; | |
2046 | return 1; | |
2047 | } | |
2048 | ||
f1987b44 JL |
2049 | static struct cifsTconInfo * |
2050 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
2051 | { | |
2052 | struct list_head *tmp; | |
2053 | struct cifsTconInfo *tcon; | |
2054 | ||
3f9bcca7 | 2055 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2056 | list_for_each(tmp, &ses->tcon_list) { |
2057 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
37bb04e5 | 2058 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2059 | continue; |
f1987b44 | 2060 | ++tcon->tc_count; |
3f9bcca7 | 2061 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2062 | return tcon; |
1da177e4 | 2063 | } |
3f9bcca7 | 2064 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2065 | return NULL; |
2066 | } | |
2067 | ||
f1987b44 JL |
2068 | static void |
2069 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
2070 | { | |
2071 | int xid; | |
2072 | struct cifsSesInfo *ses = tcon->ses; | |
2073 | ||
d00c28de | 2074 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2075 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2076 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2077 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2078 | return; |
2079 | } | |
2080 | ||
2081 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2082 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2083 | |
2084 | xid = GetXid(); | |
2085 | CIFSSMBTDis(xid, tcon); | |
2086 | _FreeXid(xid); | |
2087 | ||
d03382ce | 2088 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2089 | tconInfoFree(tcon); |
f1987b44 JL |
2090 | cifs_put_smb_ses(ses); |
2091 | } | |
2092 | ||
d00c28de JL |
2093 | static struct cifsTconInfo * |
2094 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
2095 | { | |
2096 | int rc, xid; | |
2097 | struct cifsTconInfo *tcon; | |
2098 | ||
2099 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2100 | if (tcon) { | |
2101 | cFYI(1, "Found match on UNC path"); | |
2102 | /* existing tcon already has a reference */ | |
2103 | cifs_put_smb_ses(ses); | |
2104 | if (tcon->seal != volume_info->seal) | |
2105 | cERROR(1, "transport encryption setting " | |
2106 | "conflicts with existing tid"); | |
2107 | return tcon; | |
2108 | } | |
2109 | ||
2110 | tcon = tconInfoAlloc(); | |
2111 | if (tcon == NULL) { | |
2112 | rc = -ENOMEM; | |
2113 | goto out_fail; | |
2114 | } | |
2115 | ||
2116 | tcon->ses = ses; | |
2117 | if (volume_info->password) { | |
2118 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2119 | if (!tcon->password) { | |
2120 | rc = -ENOMEM; | |
2121 | goto out_fail; | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2126 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2127 | cERROR(1, "Missing share name"); | |
2128 | rc = -ENODEV; | |
2129 | goto out_fail; | |
2130 | } | |
2131 | ||
2132 | /* BB Do we need to wrap session_mutex around | |
2133 | * this TCon call and Unix SetFS as | |
2134 | * we do on SessSetup and reconnect? */ | |
2135 | xid = GetXid(); | |
2136 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2137 | FreeXid(xid); | |
2138 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2139 | if (rc) | |
2140 | goto out_fail; | |
2141 | ||
2142 | if (volume_info->nodfs) { | |
2143 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2144 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2145 | } | |
2146 | tcon->seal = volume_info->seal; | |
2147 | /* we can have only one retry value for a connection | |
2148 | to a share so for resources mounted more than once | |
2149 | to the same server share the last value passed in | |
2150 | for the retry flag is used */ | |
2151 | tcon->retry = volume_info->retry; | |
2152 | tcon->nocase = volume_info->nocase; | |
2153 | tcon->local_lease = volume_info->local_lease; | |
2154 | ||
3f9bcca7 | 2155 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2156 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2157 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2158 | |
d03382ce SJ |
2159 | cifs_fscache_get_super_cookie(tcon); |
2160 | ||
d00c28de JL |
2161 | return tcon; |
2162 | ||
2163 | out_fail: | |
2164 | tconInfoFree(tcon); | |
2165 | return ERR_PTR(rc); | |
2166 | } | |
2167 | ||
9d002df4 JL |
2168 | void |
2169 | cifs_put_tlink(struct tcon_link *tlink) | |
2170 | { | |
2171 | if (!tlink || IS_ERR(tlink)) | |
2172 | return; | |
2173 | ||
2174 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2175 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2176 | tlink->tl_time = jiffies; | |
2177 | return; | |
2178 | } | |
2179 | ||
2180 | if (!IS_ERR(tlink_tcon(tlink))) | |
2181 | cifs_put_tcon(tlink_tcon(tlink)); | |
2182 | kfree(tlink); | |
2183 | return; | |
2184 | } | |
d00c28de | 2185 | |
1da177e4 | 2186 | int |
50c2f753 SF |
2187 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
2188 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 2189 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2190 | { |
2191 | char *temp_unc; | |
2192 | int rc = 0; | |
2193 | ||
2194 | *pnum_referrals = 0; | |
366781c1 | 2195 | *preferrals = NULL; |
1da177e4 LT |
2196 | |
2197 | if (pSesInfo->ipc_tid == 0) { | |
2198 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2199 | strnlen(pSesInfo->serverName, |
2200 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2201 | + 1 + 4 /* slash IPC$ */ + 2, |
2202 | GFP_KERNEL); | |
2203 | if (temp_unc == NULL) | |
2204 | return -ENOMEM; | |
2205 | temp_unc[0] = '\\'; | |
2206 | temp_unc[1] = '\\'; | |
2207 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2208 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2209 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2210 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2211 | kfree(temp_unc); |
2212 | } | |
2213 | if (rc == 0) | |
c2cf07d5 | 2214 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2215 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2216 | /* BB map targetUNCs to dfs_info3 structures, here or |
2217 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2218 | |
2219 | return rc; | |
2220 | } | |
2221 | ||
09e50d55 JL |
2222 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2223 | static struct lock_class_key cifs_key[2]; | |
2224 | static struct lock_class_key cifs_slock_key[2]; | |
2225 | ||
2226 | static inline void | |
2227 | cifs_reclassify_socket4(struct socket *sock) | |
2228 | { | |
2229 | struct sock *sk = sock->sk; | |
2230 | BUG_ON(sock_owned_by_user(sk)); | |
2231 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2232 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2233 | } | |
2234 | ||
2235 | static inline void | |
2236 | cifs_reclassify_socket6(struct socket *sock) | |
2237 | { | |
2238 | struct sock *sk = sock->sk; | |
2239 | BUG_ON(sock_owned_by_user(sk)); | |
2240 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2241 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2242 | } | |
2243 | #else | |
2244 | static inline void | |
2245 | cifs_reclassify_socket4(struct socket *sock) | |
2246 | { | |
2247 | } | |
2248 | ||
2249 | static inline void | |
2250 | cifs_reclassify_socket6(struct socket *sock) | |
2251 | { | |
2252 | } | |
2253 | #endif | |
2254 | ||
1da177e4 | 2255 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2256 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2257 | { |
50c2f753 | 2258 | unsigned int i, j; |
1da177e4 | 2259 | |
50c2f753 | 2260 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2261 | /* mask a nibble at a time and encode */ |
2262 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2263 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2264 | j += 2; |
1da177e4 LT |
2265 | } |
2266 | ||
2267 | } | |
2268 | ||
3eb9a889 BG |
2269 | static int |
2270 | bind_socket(struct TCP_Server_Info *server) | |
2271 | { | |
2272 | int rc = 0; | |
2273 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2274 | /* Bind to the specified local IP address */ | |
2275 | struct socket *socket = server->ssocket; | |
2276 | rc = socket->ops->bind(socket, | |
2277 | (struct sockaddr *) &server->srcaddr, | |
2278 | sizeof(server->srcaddr)); | |
2279 | if (rc < 0) { | |
2280 | struct sockaddr_in *saddr4; | |
2281 | struct sockaddr_in6 *saddr6; | |
2282 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2283 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2284 | if (saddr6->sin6_family == AF_INET6) | |
2285 | cERROR(1, "cifs: " | |
2286 | "Failed to bind to: %pI6c, error: %d\n", | |
2287 | &saddr6->sin6_addr, rc); | |
2288 | else | |
2289 | cERROR(1, "cifs: " | |
2290 | "Failed to bind to: %pI4, error: %d\n", | |
2291 | &saddr4->sin_addr.s_addr, rc); | |
2292 | } | |
2293 | } | |
2294 | return rc; | |
2295 | } | |
1da177e4 LT |
2296 | |
2297 | static int | |
a9f1b85e | 2298 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2299 | { |
2300 | int rc = 0; | |
a9f1b85e PS |
2301 | /* |
2302 | * some servers require RFC1001 sessinit before sending | |
2303 | * negprot - BB check reconnection in case where second | |
2304 | * sessinit is sent but no second negprot | |
2305 | */ | |
2306 | struct rfc1002_session_packet *ses_init_buf; | |
2307 | struct smb_hdr *smb_buf; | |
2308 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2309 | GFP_KERNEL); | |
2310 | if (ses_init_buf) { | |
2311 | ses_init_buf->trailer.session_req.called_len = 32; | |
2312 | ||
2313 | if (server->server_RFC1001_name && | |
2314 | server->server_RFC1001_name[0] != 0) | |
2315 | rfc1002mangle(ses_init_buf->trailer. | |
2316 | session_req.called_name, | |
2317 | server->server_RFC1001_name, | |
2318 | RFC1001_NAME_LEN_WITH_NULL); | |
2319 | else | |
2320 | rfc1002mangle(ses_init_buf->trailer. | |
2321 | session_req.called_name, | |
2322 | DEFAULT_CIFS_CALLED_NAME, | |
2323 | RFC1001_NAME_LEN_WITH_NULL); | |
2324 | ||
2325 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2326 | ||
2327 | /* | |
2328 | * calling name ends in null (byte 16) from old smb | |
2329 | * convention. | |
2330 | */ | |
2331 | if (server->workstation_RFC1001_name && | |
2332 | server->workstation_RFC1001_name[0] != 0) | |
2333 | rfc1002mangle(ses_init_buf->trailer. | |
2334 | session_req.calling_name, | |
2335 | server->workstation_RFC1001_name, | |
2336 | RFC1001_NAME_LEN_WITH_NULL); | |
2337 | else | |
2338 | rfc1002mangle(ses_init_buf->trailer. | |
2339 | session_req.calling_name, | |
2340 | "LINUX_CIFS_CLNT", | |
2341 | RFC1001_NAME_LEN_WITH_NULL); | |
2342 | ||
2343 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2344 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2345 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2346 | ||
2347 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2348 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2349 | rc = smb_send(server, smb_buf, 0x44); |
2350 | kfree(ses_init_buf); | |
2351 | /* | |
2352 | * RFC1001 layer in at least one server | |
2353 | * requires very short break before negprot | |
2354 | * presumably because not expecting negprot | |
2355 | * to follow so fast. This is a simple | |
2356 | * solution that works without | |
2357 | * complicating the code and causes no | |
2358 | * significant slowing down on mount | |
2359 | * for everyone else | |
2360 | */ | |
2361 | usleep_range(1000, 2000); | |
2362 | } | |
2363 | /* | |
2364 | * else the negprot may still work without this | |
2365 | * even though malloc failed | |
2366 | */ | |
2367 | ||
2368 | return rc; | |
2369 | } | |
2370 | ||
2371 | static int | |
2372 | generic_ip_connect(struct TCP_Server_Info *server) | |
2373 | { | |
2374 | int rc = 0; | |
6da97910 | 2375 | __be16 sport; |
a9f1b85e | 2376 | int slen, sfamily; |
bcf4b106 | 2377 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2378 | struct sockaddr *saddr; |
2379 | ||
2380 | saddr = (struct sockaddr *) &server->dstaddr; | |
2381 | ||
2382 | if (server->dstaddr.ss_family == AF_INET6) { | |
2383 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2384 | slen = sizeof(struct sockaddr_in6); | |
2385 | sfamily = AF_INET6; | |
2386 | } else { | |
2387 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2388 | slen = sizeof(struct sockaddr_in); | |
2389 | sfamily = AF_INET; | |
2390 | } | |
1da177e4 | 2391 | |
bcf4b106 | 2392 | if (socket == NULL) { |
f1d0c998 RL |
2393 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2394 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2395 | if (rc < 0) { |
b6b38f70 | 2396 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2397 | server->ssocket = NULL; |
1da177e4 | 2398 | return rc; |
1da177e4 | 2399 | } |
bcf4b106 JL |
2400 | |
2401 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2402 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2403 | server->ssocket = socket; |
2404 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2405 | if (sfamily == AF_INET6) |
2406 | cifs_reclassify_socket6(socket); | |
2407 | else | |
2408 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2409 | } |
2410 | ||
3eb9a889 BG |
2411 | rc = bind_socket(server); |
2412 | if (rc < 0) | |
2413 | return rc; | |
2414 | ||
a9f1b85e PS |
2415 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2416 | if (rc < 0) { | |
2417 | cFYI(1, "Error %d connecting to server", rc); | |
bcf4b106 JL |
2418 | sock_release(socket); |
2419 | server->ssocket = NULL; | |
1da177e4 LT |
2420 | return rc; |
2421 | } | |
bcf4b106 | 2422 | |
bcf4b106 JL |
2423 | /* |
2424 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2425 | * the default. sock_setsockopt not used because it expects |
2426 | * user space buffer | |
bcf4b106 JL |
2427 | */ |
2428 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2429 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2430 | |
b387eaeb | 2431 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2432 | if (server->noautotune) { |
2433 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2434 | socket->sk->sk_sndbuf = 200 * 1024; | |
2435 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2436 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2437 | } |
1da177e4 | 2438 | |
6a5fa236 | 2439 | if (server->tcp_nodelay) { |
a9f1b85e | 2440 | int val = 1; |
6a5fa236 SF |
2441 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2442 | (char *)&val, sizeof(val)); | |
2443 | if (rc) | |
b6b38f70 | 2444 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2445 | } |
2446 | ||
b6b38f70 | 2447 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2448 | socket->sk->sk_sndbuf, |
b6b38f70 | 2449 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2450 | |
a9f1b85e PS |
2451 | if (sport == htons(RFC1001_PORT)) |
2452 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2453 | |
1da177e4 LT |
2454 | return rc; |
2455 | } | |
2456 | ||
2457 | static int | |
a9f1b85e | 2458 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2459 | { |
6da97910 | 2460 | __be16 *sport; |
a9f1b85e PS |
2461 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2462 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2463 | |
a9f1b85e PS |
2464 | if (server->dstaddr.ss_family == AF_INET6) |
2465 | sport = &addr6->sin6_port; | |
2466 | else | |
2467 | sport = &addr->sin_port; | |
1da177e4 | 2468 | |
a9f1b85e PS |
2469 | if (*sport == 0) { |
2470 | int rc; | |
1da177e4 | 2471 | |
a9f1b85e PS |
2472 | /* try with 445 port at first */ |
2473 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2474 | |
a9f1b85e | 2475 | rc = generic_ip_connect(server); |
1da177e4 | 2476 | if (rc >= 0) |
a9f1b85e | 2477 | return rc; |
6a5fa236 | 2478 | |
a9f1b85e PS |
2479 | /* if it failed, try with 139 port */ |
2480 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2481 | } |
2482 | ||
a9f1b85e | 2483 | return generic_ip_connect(server); |
1da177e4 LT |
2484 | } |
2485 | ||
50c2f753 SF |
2486 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2487 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2488 | { |
2489 | /* if we are reconnecting then should we check to see if | |
2490 | * any requested capabilities changed locally e.g. via | |
2491 | * remount but we can not do much about it here | |
2492 | * if they have (even if we could detect it by the following) | |
2493 | * Perhaps we could add a backpointer to array of sb from tcon | |
2494 | * or if we change to make all sb to same share the same | |
2495 | * sb as NFS - then we only have one backpointer to sb. | |
2496 | * What if we wanted to mount the server share twice once with | |
2497 | * and once without posixacls or posix paths? */ | |
2498 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2499 | |
c18c842b SF |
2500 | if (vol_info && vol_info->no_linux_ext) { |
2501 | tcon->fsUnixInfo.Capability = 0; | |
2502 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2503 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2504 | return; |
2505 | } else if (vol_info) | |
2506 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2507 | ||
2508 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2509 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2510 | return; |
2511 | } | |
50c2f753 | 2512 | |
fb8c4b14 | 2513 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2514 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
50c2f753 | 2515 | |
8af18971 SF |
2516 | /* check for reconnect case in which we do not |
2517 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2518 | if (vol_info == NULL) { |
50c2f753 | 2519 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2520 | originally at mount time */ |
2521 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2522 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2523 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2524 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2525 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2526 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2527 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2528 | cERROR(1, "possible reconnect error"); |
2529 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2530 | } |
8af18971 | 2531 | } |
50c2f753 | 2532 | |
8af18971 | 2533 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2534 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2535 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2536 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2537 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2538 | if (sb) |
8af18971 SF |
2539 | sb->s_flags |= MS_POSIXACL; |
2540 | } | |
2541 | ||
75865f8c | 2542 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2543 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2544 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2545 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2546 | if (sb) |
50c2f753 | 2547 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2548 | CIFS_MOUNT_POSIX_PATHS; |
2549 | } | |
50c2f753 | 2550 | |
984acfe1 SF |
2551 | /* We might be setting the path sep back to a different |
2552 | form if we are reconnecting and the server switched its | |
50c2f753 | 2553 | posix path capability for this share */ |
75865f8c | 2554 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2555 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2556 | |
2557 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2558 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2559 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2560 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2561 | } |
2562 | } | |
50c2f753 SF |
2563 | |
2564 | ||
b6b38f70 | 2565 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2566 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2567 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2568 | cFYI(1, "FCNTL cap"); |
75865f8c | 2569 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2570 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2571 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2572 | cFYI(1, "POSIX path cap"); |
75865f8c | 2573 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2574 | cFYI(1, "XATTR cap"); |
75865f8c | 2575 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2576 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2577 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2578 | cFYI(1, "very large read cap"); |
75865f8c | 2579 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2580 | cFYI(1, "very large write cap"); |
8af18971 SF |
2581 | #endif /* CIFS_DEBUG2 */ |
2582 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2583 | if (vol_info == NULL) { |
b6b38f70 | 2584 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2585 | } else |
b6b38f70 | 2586 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2587 | "with the server failed. Consider " |
2588 | "mounting with the Unix Extensions\n" | |
2589 | "disabled, if problems are found, " | |
2590 | "by specifying the nounix mount " | |
b6b38f70 | 2591 | "option."); |
5a44b319 | 2592 | |
8af18971 SF |
2593 | } |
2594 | } | |
2595 | } | |
2596 | ||
03a143c9 SF |
2597 | static void |
2598 | convert_delimiter(char *path, char delim) | |
2599 | { | |
2600 | int i; | |
c2d68ea6 | 2601 | char old_delim; |
03a143c9 SF |
2602 | |
2603 | if (path == NULL) | |
2604 | return; | |
2605 | ||
582d21e5 | 2606 | if (delim == '/') |
c2d68ea6 SF |
2607 | old_delim = '\\'; |
2608 | else | |
2609 | old_delim = '/'; | |
2610 | ||
03a143c9 | 2611 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2612 | if (path[i] == old_delim) |
03a143c9 SF |
2613 | path[i] = delim; |
2614 | } | |
2615 | } | |
2616 | ||
724d9f1c PS |
2617 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
2618 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2619 | { |
2de970ff JL |
2620 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2621 | ||
3b795210 | 2622 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2623 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2624 | pvolume_info->rsize); | |
3b795210 SF |
2625 | cifs_sb->rsize = CIFSMaxBufSize; |
2626 | } else if ((pvolume_info->rsize) && | |
2627 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2628 | cifs_sb->rsize = pvolume_info->rsize; | |
2629 | else /* default */ | |
2630 | cifs_sb->rsize = CIFSMaxBufSize; | |
2631 | ||
2632 | if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) { | |
b6b38f70 JP |
2633 | cERROR(1, "wsize %d too large, using 4096 instead", |
2634 | pvolume_info->wsize); | |
3b795210 SF |
2635 | cifs_sb->wsize = 4096; |
2636 | } else if (pvolume_info->wsize) | |
2637 | cifs_sb->wsize = pvolume_info->wsize; | |
2638 | else | |
2639 | cifs_sb->wsize = min_t(const int, | |
2640 | PAGEVEC_SIZE * PAGE_CACHE_SIZE, | |
2641 | 127*1024); | |
2642 | /* old default of CIFSMaxBufSize was too small now | |
2643 | that SMB Write2 can send multiple pages in kvec. | |
2644 | RFC1001 does not describe what happens when frame | |
2645 | bigger than 128K is sent so use that as max in | |
2646 | conjunction with 52K kvec constraint on arch with 4K | |
2647 | page size */ | |
2648 | ||
2649 | if (cifs_sb->rsize < 2048) { | |
2650 | cifs_sb->rsize = 2048; | |
2651 | /* Windows ME may prefer this */ | |
b6b38f70 | 2652 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2653 | } |
2654 | /* calculate prepath */ | |
2655 | cifs_sb->prepath = pvolume_info->prepath; | |
2656 | if (cifs_sb->prepath) { | |
2657 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2658 | /* we can not convert the / to \ in the path | |
2659 | separators in the prefixpath yet because we do not | |
2660 | know (until reset_cifs_unix_caps is called later) | |
2661 | whether POSIX PATH CAP is available. We normalize | |
2662 | the / to \ after reset_cifs_unix_caps is called */ | |
2663 | pvolume_info->prepath = NULL; | |
2664 | } else | |
2665 | cifs_sb->prepathlen = 0; | |
2666 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2667 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2668 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2669 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2670 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2671 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2672 | |
6d20e840 | 2673 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 2674 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 2675 | |
3b795210 SF |
2676 | if (pvolume_info->noperm) |
2677 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2678 | if (pvolume_info->setuids) | |
2679 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2680 | if (pvolume_info->server_ino) | |
2681 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2682 | if (pvolume_info->remap) | |
2683 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2684 | if (pvolume_info->no_xattr) | |
2685 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2686 | if (pvolume_info->sfu_emul) | |
2687 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2688 | if (pvolume_info->nobrl) | |
2689 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2690 | if (pvolume_info->nostrictsync) |
4717bed6 | 2691 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2692 | if (pvolume_info->mand_lock) |
2693 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2694 | if (pvolume_info->cifs_acl) |
2695 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2696 | if (pvolume_info->override_uid) | |
2697 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2698 | if (pvolume_info->override_gid) | |
2699 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2700 | if (pvolume_info->dynperm) | |
2701 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2702 | if (pvolume_info->fsc) |
2703 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2704 | if (pvolume_info->multiuser) |
2705 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2706 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
2707 | if (pvolume_info->strict_io) |
2708 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 2709 | if (pvolume_info->direct_io) { |
b6b38f70 | 2710 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2711 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2712 | } | |
736a3320 SM |
2713 | if (pvolume_info->mfsymlinks) { |
2714 | if (pvolume_info->sfu_emul) { | |
2715 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2716 | "mount option is used"); | |
2717 | } else { | |
2718 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2719 | } | |
2720 | } | |
3b795210 SF |
2721 | |
2722 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2723 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2724 | "mount option supported"); | |
b1c8d2b4 JL |
2725 | } |
2726 | ||
e4cce94c IM |
2727 | static int |
2728 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2729 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2730 | { | |
2731 | int rc; | |
e4cce94c IM |
2732 | FILE_ALL_INFO *pfile_info; |
2733 | ||
e4cce94c IM |
2734 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2735 | if (pfile_info == NULL) | |
2736 | return -ENOMEM; | |
2737 | ||
2738 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2739 | 0 /* not legacy */, cifs_sb->local_nls, | |
2740 | cifs_sb->mnt_cifs_flags & | |
2741 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
2742 | |
2743 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
2744 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
2745 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
2746 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
2747 | kfree(pfile_info); |
2748 | return rc; | |
2749 | } | |
2750 | ||
724d9f1c PS |
2751 | void |
2752 | cifs_cleanup_volume_info(struct smb_vol **pvolume_info) | |
1bfe73c2 IM |
2753 | { |
2754 | struct smb_vol *volume_info; | |
2755 | ||
ad6cca6d | 2756 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2757 | return; |
2758 | ||
2759 | volume_info = *pvolume_info; | |
b946845a | 2760 | kfree(volume_info->username); |
1bfe73c2 IM |
2761 | kzfree(volume_info->password); |
2762 | kfree(volume_info->UNC); | |
b946845a SF |
2763 | kfree(volume_info->UNCip); |
2764 | kfree(volume_info->domainname); | |
2765 | kfree(volume_info->iocharset); | |
1bfe73c2 IM |
2766 | kfree(volume_info->prepath); |
2767 | kfree(volume_info); | |
2768 | *pvolume_info = NULL; | |
2769 | return; | |
2770 | } | |
2771 | ||
2d6d589d | 2772 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2773 | /* build_path_to_root returns full path to root when |
2774 | * we do not have an exiting connection (tcon) */ | |
2775 | static char * | |
2776 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2777 | const struct cifs_sb_info *cifs_sb) | |
2778 | { | |
2779 | char *full_path; | |
2780 | ||
2781 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2782 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2783 | if (full_path == NULL) | |
2784 | return ERR_PTR(-ENOMEM); | |
2785 | ||
2786 | strncpy(full_path, volume_info->UNC, unc_len); | |
2787 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2788 | int i; | |
2789 | for (i = 0; i < unc_len; i++) { | |
2790 | if (full_path[i] == '\\') | |
2791 | full_path[i] = '/'; | |
2792 | } | |
2793 | } | |
2794 | ||
2795 | if (cifs_sb->prepathlen) | |
2796 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2797 | cifs_sb->prepathlen); | |
2798 | ||
2799 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2800 | return full_path; | |
2801 | } | |
dd613945 SF |
2802 | |
2803 | /* | |
2804 | * Perform a dfs referral query for a share and (optionally) prefix | |
2805 | * | |
046462ab SF |
2806 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
2807 | * to a string containing updated options for the submount. Otherwise it | |
2808 | * will be left untouched. | |
dd613945 SF |
2809 | * |
2810 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
2811 | * determine whether there were referrals. | |
2812 | */ | |
2813 | static int | |
2814 | expand_dfs_referral(int xid, struct cifsSesInfo *pSesInfo, | |
2815 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, | |
046462ab | 2816 | int check_prefix) |
dd613945 SF |
2817 | { |
2818 | int rc; | |
2819 | unsigned int num_referrals = 0; | |
2820 | struct dfs_info3_param *referrals = NULL; | |
2821 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
2822 | ||
2823 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2824 | if (IS_ERR(full_path)) | |
2825 | return PTR_ERR(full_path); | |
2826 | ||
2827 | /* For DFS paths, skip the first '\' of the UNC */ | |
2828 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
2829 | ||
2830 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
2831 | &num_referrals, &referrals, | |
2832 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2833 | ||
2834 | if (!rc && num_referrals > 0) { | |
2835 | char *fake_devname = NULL; | |
2836 | ||
2837 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
2838 | full_path + 1, referrals, | |
2839 | &fake_devname); | |
2840 | ||
2841 | free_dfs_info_array(referrals, num_referrals); | |
2842 | kfree(fake_devname); | |
2843 | ||
046462ab SF |
2844 | if (cifs_sb->mountdata != NULL) |
2845 | kfree(cifs_sb->mountdata); | |
2846 | ||
dd613945 SF |
2847 | if (IS_ERR(mdata)) { |
2848 | rc = PTR_ERR(mdata); | |
2849 | mdata = NULL; | |
2850 | } | |
046462ab | 2851 | cifs_sb->mountdata = mdata; |
dd613945 SF |
2852 | } |
2853 | kfree(full_path); | |
2854 | return rc; | |
2855 | } | |
2d6d589d | 2856 | #endif |
1bfe73c2 | 2857 | |
724d9f1c PS |
2858 | int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data, |
2859 | const char *devname) | |
1da177e4 | 2860 | { |
7586b765 | 2861 | struct smb_vol *volume_info; |
724d9f1c | 2862 | int rc = 0; |
1da177e4 | 2863 | |
724d9f1c | 2864 | *pvolume_info = NULL; |
1da177e4 | 2865 | |
7586b765 JL |
2866 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2867 | if (!volume_info) { | |
2868 | rc = -ENOMEM; | |
2869 | goto out; | |
2870 | } | |
50c2f753 | 2871 | |
724d9f1c | 2872 | if (cifs_parse_mount_options(mount_data, devname, |
f14bcf71 | 2873 | volume_info)) { |
70fe7dc0 JL |
2874 | rc = -EINVAL; |
2875 | goto out; | |
1da177e4 LT |
2876 | } |
2877 | ||
7586b765 | 2878 | if (volume_info->nullauth) { |
b6b38f70 | 2879 | cFYI(1, "null user"); |
7586b765 JL |
2880 | volume_info->username = ""; |
2881 | } else if (volume_info->username) { | |
1da177e4 | 2882 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2883 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2884 | } else { |
bf820679 | 2885 | cifserror("No username specified"); |
50c2f753 SF |
2886 | /* In userspace mount helper we can get user name from alternate |
2887 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2888 | rc = -EINVAL; |
2889 | goto out; | |
1da177e4 LT |
2890 | } |
2891 | ||
1da177e4 | 2892 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2893 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2894 | /* load_nls_default cannot return null */ |
2895 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2896 | } else { |
a5fc4ce0 JL |
2897 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2898 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2899 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2900 | volume_info->iocharset); | |
70fe7dc0 JL |
2901 | rc = -ELIBACC; |
2902 | goto out; | |
1da177e4 LT |
2903 | } |
2904 | } | |
724d9f1c PS |
2905 | |
2906 | *pvolume_info = volume_info; | |
2907 | return rc; | |
2908 | out: | |
2909 | cifs_cleanup_volume_info(&volume_info); | |
2910 | return rc; | |
2911 | } | |
2912 | ||
2913 | int | |
2914 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
2915 | struct smb_vol *volume_info, const char *devname) | |
2916 | { | |
2917 | int rc = 0; | |
2918 | int xid; | |
2919 | struct cifsSesInfo *pSesInfo; | |
2920 | struct cifsTconInfo *tcon; | |
2921 | struct TCP_Server_Info *srvTcp; | |
2922 | char *full_path; | |
2923 | struct tcon_link *tlink; | |
2924 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
2925 | int referral_walks_count = 0; | |
2926 | try_mount_again: | |
2927 | /* cleanup activities if we're chasing a referral */ | |
2928 | if (referral_walks_count) { | |
2929 | if (tcon) | |
2930 | cifs_put_tcon(tcon); | |
2931 | else if (pSesInfo) | |
2932 | cifs_put_smb_ses(pSesInfo); | |
2933 | ||
2934 | cifs_cleanup_volume_info(&volume_info); | |
2935 | FreeXid(xid); | |
2936 | } | |
2937 | #endif | |
2938 | tcon = NULL; | |
2939 | pSesInfo = NULL; | |
2940 | srvTcp = NULL; | |
2941 | full_path = NULL; | |
2942 | tlink = NULL; | |
2943 | ||
2944 | xid = GetXid(); | |
1da177e4 | 2945 | |
63c038c2 | 2946 | /* get a reference to a tcp session */ |
7586b765 | 2947 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
2948 | if (IS_ERR(srvTcp)) { |
2949 | rc = PTR_ERR(srvTcp); | |
2950 | goto out; | |
1da177e4 LT |
2951 | } |
2952 | ||
36988c76 JL |
2953 | /* get a reference to a SMB session */ |
2954 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
2955 | if (IS_ERR(pSesInfo)) { | |
2956 | rc = PTR_ERR(pSesInfo); | |
2957 | pSesInfo = NULL; | |
2958 | goto mount_fail_check; | |
1da177e4 | 2959 | } |
50c2f753 | 2960 | |
d00c28de JL |
2961 | if (pSesInfo->capabilities & CAP_LARGE_FILES) |
2962 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2963 | else | |
2964 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 2965 | |
8af18971 | 2966 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
2967 | sb->s_time_gran = 100; |
2968 | ||
d00c28de JL |
2969 | /* search for existing tcon to this server share */ |
2970 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
2971 | if (IS_ERR(tcon)) { | |
2972 | rc = PTR_ERR(tcon); | |
2973 | tcon = NULL; | |
1bfe73c2 | 2974 | goto remote_path_check; |
d00c28de | 2975 | } |
1bfe73c2 | 2976 | |
d82c2df5 SF |
2977 | /* do not care if following two calls succeed - informational */ |
2978 | if (!tcon->ipc) { | |
2979 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
2980 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
2981 | } | |
03a143c9 | 2982 | |
d82c2df5 SF |
2983 | /* tell server which Unix caps we support */ |
2984 | if (tcon->ses->capabilities & CAP_UNIX) | |
2985 | /* reset of caps checks mount to see if unix extensions | |
2986 | disabled for just this mount */ | |
7586b765 | 2987 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
d82c2df5 SF |
2988 | else |
2989 | tcon->unix_ext = 0; /* server does not support them */ | |
c18c842b | 2990 | |
d82c2df5 SF |
2991 | /* convert forward to back slashes in prepath here if needed */ |
2992 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2993 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 2994 | |
d82c2df5 SF |
2995 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
2996 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 2997 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 2998 | } |
d82c2df5 SF |
2999 | if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X)) |
3000 | cifs_sb->wsize = min(cifs_sb->wsize, | |
3001 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
3002 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) | |
3003 | cifs_sb->rsize = min(cifs_sb->rsize, | |
3004 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 3005 | |
1bfe73c2 | 3006 | remote_path_check: |
c1508ca2 SF |
3007 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3008 | /* | |
3009 | * Perform an unconditional check for whether there are DFS | |
3010 | * referrals for this path without prefix, to provide support | |
3011 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3012 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3013 | * Chase the referral if found, otherwise continue normally. | |
3014 | */ | |
3015 | if (referral_walks_count == 0) { | |
3016 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3017 | cifs_sb, false); |
c1508ca2 SF |
3018 | if (!refrc) { |
3019 | referral_walks_count++; | |
3020 | goto try_mount_again; | |
3021 | } | |
3022 | } | |
3023 | #endif | |
3024 | ||
1bfe73c2 | 3025 | /* check if a whole path (including prepath) is not remote */ |
70945643 | 3026 | if (!rc && tcon) { |
e4cce94c | 3027 | /* build_path_to_root works only when we have a valid tcon */ |
7d161b7f | 3028 | full_path = cifs_build_path_to_root(cifs_sb, tcon); |
e4cce94c IM |
3029 | if (full_path == NULL) { |
3030 | rc = -ENOMEM; | |
3031 | goto mount_fail_check; | |
3032 | } | |
3033 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3034 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3035 | kfree(full_path); |
3036 | goto mount_fail_check; | |
3037 | } | |
3038 | kfree(full_path); | |
3039 | } | |
3040 | ||
1bfe73c2 IM |
3041 | /* get referral if needed */ |
3042 | if (rc == -EREMOTE) { | |
d036f50f | 3043 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3044 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3045 | /* | |
3046 | * BB: when we implement proper loop detection, | |
3047 | * we will remove this check. But now we need it | |
3048 | * to prevent an indefinite loop if 'DFS tree' is | |
3049 | * misconfigured (i.e. has loops). | |
3050 | */ | |
3051 | rc = -ELOOP; | |
3052 | goto mount_fail_check; | |
3053 | } | |
1bfe73c2 IM |
3054 | /* convert forward to back slashes in prepath here if needed */ |
3055 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
3056 | convert_delimiter(cifs_sb->prepath, | |
3057 | CIFS_DIR_SEP(cifs_sb)); | |
1bfe73c2 | 3058 | |
dd613945 | 3059 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3060 | true); |
7b91e266 | 3061 | |
dd613945 | 3062 | if (!rc) { |
5c2503a8 | 3063 | referral_walks_count++; |
1bfe73c2 IM |
3064 | goto try_mount_again; |
3065 | } | |
dd613945 | 3066 | goto mount_fail_check; |
d036f50f SF |
3067 | #else /* No DFS support, return error on mount */ |
3068 | rc = -EOPNOTSUPP; | |
3069 | #endif | |
1bfe73c2 IM |
3070 | } |
3071 | ||
9d002df4 JL |
3072 | if (rc) |
3073 | goto mount_fail_check; | |
3074 | ||
3075 | /* now, hang the tcon off of the superblock */ | |
3076 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3077 | if (tlink == NULL) { | |
3078 | rc = -ENOMEM; | |
3079 | goto mount_fail_check; | |
3080 | } | |
3081 | ||
b647c35f | 3082 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3083 | tlink->tl_tcon = tcon; |
3084 | tlink->tl_time = jiffies; | |
3085 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3086 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3087 | ||
b647c35f | 3088 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3089 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3090 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3091 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3092 | |
2de970ff JL |
3093 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
3094 | TLINK_IDLE_EXPIRE); | |
3095 | ||
1bfe73c2 IM |
3096 | mount_fail_check: |
3097 | /* on error free sesinfo and tcon struct if needed */ | |
3098 | if (rc) { | |
1bfe73c2 | 3099 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3100 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3101 | if (tcon) |
3102 | cifs_put_tcon(tcon); | |
3103 | else if (pSesInfo) | |
3104 | cifs_put_smb_ses(pSesInfo); | |
3105 | else | |
3106 | cifs_put_tcp_session(srvTcp); | |
3107 | goto out; | |
3108 | } | |
3109 | ||
7586b765 | 3110 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
3111 | (in which case it is not needed anymore) but when new sesion is created |
3112 | the password ptr is put in the new session structure (in which case the | |
3113 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
3114 | out: |
3115 | /* zero out password before freeing */ | |
1da177e4 LT |
3116 | FreeXid(xid); |
3117 | return rc; | |
3118 | } | |
3119 | ||
1da177e4 LT |
3120 | int |
3121 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
3122 | const char *tree, struct cifsTconInfo *tcon, | |
3123 | const struct nls_table *nls_codepage) | |
3124 | { | |
3125 | struct smb_hdr *smb_buffer; | |
3126 | struct smb_hdr *smb_buffer_response; | |
3127 | TCONX_REQ *pSMB; | |
3128 | TCONX_RSP *pSMBr; | |
3129 | unsigned char *bcc_ptr; | |
3130 | int rc = 0; | |
690c522f JL |
3131 | int length; |
3132 | __u16 bytes_left, count; | |
1da177e4 LT |
3133 | |
3134 | if (ses == NULL) | |
3135 | return -EIO; | |
3136 | ||
3137 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3138 | if (smb_buffer == NULL) |
1da177e4 | 3139 | return -ENOMEM; |
ca43e3be | 3140 | |
1da177e4 LT |
3141 | smb_buffer_response = smb_buffer; |
3142 | ||
3143 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3144 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3145 | |
3146 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3147 | smb_buffer->Uid = ses->Suid; |
3148 | pSMB = (TCONX_REQ *) smb_buffer; | |
3149 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3150 | ||
3151 | pSMB->AndXCommand = 0xFF; | |
3152 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3153 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 3154 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 3155 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3156 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3157 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3158 | /* already aligned so no need to do it below */ |
eeac8047 | 3159 | } else { |
540b2e37 | 3160 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3161 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3162 | specified as required (when that support is added to | |
3163 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3164 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3165 | by Samba (not sure whether other servers allow |
3166 | NTLMv2 password here) */ | |
7c7b25bc | 3167 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3168 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3169 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3170 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
4e53a3fb JL |
3171 | ses->server->secMode & |
3172 | SECMODE_PW_ENCRYPT ? true : false, | |
3173 | bcc_ptr); | |
7c7b25bc SF |
3174 | else |
3175 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 SP |
3176 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
3177 | bcc_ptr); | |
eeac8047 | 3178 | |
540b2e37 | 3179 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3180 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3181 | /* must align unicode strings */ |
3182 | *bcc_ptr = 0; /* null byte password */ | |
3183 | bcc_ptr++; | |
3184 | } | |
eeac8047 | 3185 | } |
1da177e4 | 3186 | |
50c2f753 | 3187 | if (ses->server->secMode & |
a878fb22 | 3188 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3189 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3190 | ||
3191 | if (ses->capabilities & CAP_STATUS32) { | |
3192 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3193 | } | |
3194 | if (ses->capabilities & CAP_DFS) { | |
3195 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3196 | } | |
3197 | if (ses->capabilities & CAP_UNICODE) { | |
3198 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3199 | length = | |
50c2f753 SF |
3200 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3201 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3202 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3203 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3204 | bcc_ptr += 2; /* skip trailing null */ |
3205 | } else { /* ASCII */ | |
1da177e4 LT |
3206 | strcpy(bcc_ptr, tree); |
3207 | bcc_ptr += strlen(tree) + 1; | |
3208 | } | |
3209 | strcpy(bcc_ptr, "?????"); | |
3210 | bcc_ptr += strlen("?????"); | |
3211 | bcc_ptr += 1; | |
3212 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3213 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3214 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3215 | pSMB->ByteCount = cpu_to_le16(count); |
3216 | ||
133672ef | 3217 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3218 | 0); |
1da177e4 | 3219 | |
1da177e4 LT |
3220 | /* above now done in SendReceive */ |
3221 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3222 | bool is_unicode; |
3223 | ||
1da177e4 | 3224 | tcon->tidStatus = CifsGood; |
3b795210 | 3225 | tcon->need_reconnect = false; |
1da177e4 LT |
3226 | tcon->tid = smb_buffer_response->Tid; |
3227 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3228 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3229 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3230 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3231 | is_unicode = true; | |
3232 | else | |
3233 | is_unicode = false; | |
3234 | ||
cc20c031 | 3235 | |
50c2f753 | 3236 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3237 | if (length == 3) { |
3238 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3239 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3240 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3241 | tcon->ipc = 1; |
3242 | } | |
3243 | } else if (length == 2) { | |
3244 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3245 | /* the most common case */ | |
b6b38f70 | 3246 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3247 | } |
3248 | } | |
50c2f753 | 3249 | bcc_ptr += length + 1; |
cc20c031 | 3250 | bytes_left -= (length + 1); |
1da177e4 | 3251 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3252 | |
3253 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3254 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3255 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3256 | bytes_left, is_unicode, |
cc20c031 JL |
3257 | nls_codepage); |
3258 | ||
b6b38f70 | 3259 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3260 | |
fb8c4b14 | 3261 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3262 | (smb_buffer_response->WordCount == 7)) |
3263 | /* field is in same location */ | |
3979877e SF |
3264 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3265 | else | |
3266 | tcon->Flags = 0; | |
b6b38f70 | 3267 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3268 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3269 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3270 | ses->ipc_tid = smb_buffer_response->Tid; |
3271 | } | |
3272 | ||
a8a11d39 | 3273 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3274 | return rc; |
3275 | } | |
3276 | ||
3277 | int | |
3278 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
3279 | { | |
b647c35f JL |
3280 | struct rb_root *root = &cifs_sb->tlink_tree; |
3281 | struct rb_node *node; | |
3282 | struct tcon_link *tlink; | |
50c2f753 | 3283 | char *tmp; |
9d002df4 | 3284 | |
2de970ff JL |
3285 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3286 | ||
b647c35f JL |
3287 | spin_lock(&cifs_sb->tlink_tree_lock); |
3288 | while ((node = rb_first(root))) { | |
3289 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3290 | cifs_get_tlink(tlink); | |
3291 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3292 | rb_erase(node, root); | |
1da177e4 | 3293 | |
b647c35f JL |
3294 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3295 | cifs_put_tlink(tlink); | |
3296 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3297 | } | |
3298 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3299 | |
2fe87f02 SF |
3300 | tmp = cifs_sb->prepath; |
3301 | cifs_sb->prepathlen = 0; | |
3302 | cifs_sb->prepath = NULL; | |
3303 | kfree(tmp); | |
1da177e4 | 3304 | |
9d002df4 | 3305 | return 0; |
50c2f753 | 3306 | } |
1da177e4 | 3307 | |
198b5682 | 3308 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
3309 | { |
3310 | int rc = 0; | |
198b5682 | 3311 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3312 | |
198b5682 JL |
3313 | /* only send once per connect */ |
3314 | if (server->maxBuf != 0) | |
3315 | return 0; | |
3316 | ||
3317 | rc = CIFSSMBNegotiate(xid, ses); | |
3318 | if (rc == -EAGAIN) { | |
3319 | /* retry only once on 1st time connection */ | |
3320 | rc = CIFSSMBNegotiate(xid, ses); | |
3321 | if (rc == -EAGAIN) | |
3322 | rc = -EHOSTDOWN; | |
1da177e4 | 3323 | } |
198b5682 JL |
3324 | if (rc == 0) { |
3325 | spin_lock(&GlobalMid_Lock); | |
3326 | if (server->tcpStatus != CifsExiting) | |
3327 | server->tcpStatus = CifsGood; | |
3328 | else | |
3329 | rc = -EHOSTDOWN; | |
3330 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3331 | |
198b5682 JL |
3332 | } |
3333 | ||
3334 | return rc; | |
3335 | } | |
3336 | ||
3337 | ||
3338 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
3339 | struct nls_table *nls_info) | |
3340 | { | |
3341 | int rc = 0; | |
3342 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3343 | |
198b5682 JL |
3344 | ses->flags = 0; |
3345 | ses->capabilities = server->capabilities; | |
26b994fa | 3346 | if (linuxExtEnabled == 0) |
198b5682 | 3347 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3348 | |
b6b38f70 JP |
3349 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
3350 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 3351 | |
198b5682 | 3352 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3353 | if (rc) { |
b6b38f70 | 3354 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3355 | } else { |
5d0d2882 SP |
3356 | mutex_lock(&ses->server->srv_mutex); |
3357 | if (!server->session_estab) { | |
21e73393 | 3358 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3359 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3360 | server->sequence_number = 0x2; |
3361 | server->session_estab = true; | |
3362 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3363 | } |
3364 | mutex_unlock(&server->srv_mutex); | |
3365 | ||
b6b38f70 | 3366 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3367 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3368 | ses->status = CifsGood; |
3369 | ses->need_reconnect = false; | |
20418acd | 3370 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3371 | } |
26b994fa | 3372 | |
21e73393 SP |
3373 | kfree(ses->auth_key.response); |
3374 | ses->auth_key.response = NULL; | |
3375 | ses->auth_key.len = 0; | |
d3686d54 SP |
3376 | kfree(ses->ntlmssp); |
3377 | ses->ntlmssp = NULL; | |
21e73393 | 3378 | |
1da177e4 LT |
3379 | return rc; |
3380 | } | |
3381 | ||
d2445556 | 3382 | static struct cifsTconInfo * |
9d002df4 JL |
3383 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3384 | { | |
3385 | struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb); | |
3386 | struct cifsSesInfo *ses; | |
3387 | struct cifsTconInfo *tcon = NULL; | |
3388 | struct smb_vol *vol_info; | |
34c87901 SF |
3389 | char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */ |
3390 | /* We used to have this as MAX_USERNAME which is */ | |
3391 | /* way too big now (256 instead of 32) */ | |
9d002df4 JL |
3392 | |
3393 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3394 | if (vol_info == NULL) { | |
3395 | tcon = ERR_PTR(-ENOMEM); | |
3396 | goto out; | |
3397 | } | |
3398 | ||
3399 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3400 | vol_info->username = username; | |
3401 | vol_info->local_nls = cifs_sb->local_nls; | |
3402 | vol_info->linux_uid = fsuid; | |
3403 | vol_info->cred_uid = fsuid; | |
3404 | vol_info->UNC = master_tcon->treeName; | |
3405 | vol_info->retry = master_tcon->retry; | |
3406 | vol_info->nocase = master_tcon->nocase; | |
3407 | vol_info->local_lease = master_tcon->local_lease; | |
3408 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3409 | ||
3410 | /* FIXME: allow for other secFlg settings */ | |
3411 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3412 | ||
3413 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3414 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3415 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3416 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3417 | |
3418 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3419 | if (IS_ERR(ses)) { | |
3420 | tcon = (struct cifsTconInfo *)ses; | |
3421 | cifs_put_tcp_session(master_tcon->ses->server); | |
3422 | goto out; | |
3423 | } | |
3424 | ||
3425 | tcon = cifs_get_tcon(ses, vol_info); | |
3426 | if (IS_ERR(tcon)) { | |
3427 | cifs_put_smb_ses(ses); | |
3428 | goto out; | |
3429 | } | |
3430 | ||
3431 | if (ses->capabilities & CAP_UNIX) | |
3432 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3433 | out: | |
3434 | kfree(vol_info); | |
3435 | ||
3436 | return tcon; | |
3437 | } | |
3438 | ||
413e661c | 3439 | static inline struct tcon_link * |
9d002df4 JL |
3440 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3441 | { | |
413e661c | 3442 | return cifs_sb->master_tlink; |
9d002df4 JL |
3443 | } |
3444 | ||
3445 | struct cifsTconInfo * | |
3446 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) | |
3447 | { | |
3448 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3449 | } | |
3450 | ||
3451 | static int | |
3452 | cifs_sb_tcon_pending_wait(void *unused) | |
3453 | { | |
3454 | schedule(); | |
3455 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3456 | } | |
3457 | ||
b647c35f JL |
3458 | /* find and return a tlink with given uid */ |
3459 | static struct tcon_link * | |
3460 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3461 | { | |
3462 | struct rb_node *node = root->rb_node; | |
3463 | struct tcon_link *tlink; | |
3464 | ||
3465 | while (node) { | |
3466 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3467 | ||
3468 | if (tlink->tl_uid > uid) | |
3469 | node = node->rb_left; | |
3470 | else if (tlink->tl_uid < uid) | |
3471 | node = node->rb_right; | |
3472 | else | |
3473 | return tlink; | |
3474 | } | |
3475 | return NULL; | |
3476 | } | |
3477 | ||
3478 | /* insert a tcon_link into the tree */ | |
3479 | static void | |
3480 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3481 | { | |
3482 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3483 | struct tcon_link *tlink; | |
3484 | ||
3485 | while (*new) { | |
3486 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3487 | parent = *new; | |
3488 | ||
3489 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3490 | new = &((*new)->rb_left); | |
3491 | else | |
3492 | new = &((*new)->rb_right); | |
3493 | } | |
3494 | ||
3495 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3496 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3497 | } | |
3498 | ||
9d002df4 JL |
3499 | /* |
3500 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3501 | * current task. | |
3502 | * | |
3503 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3504 | * the master tcon for the mount. | |
3505 | * | |
6ef933a3 | 3506 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3507 | * exists, then check to see if it's pending construction. If it is then wait |
3508 | * for construction to complete. Once it's no longer pending, check to see if | |
3509 | * it failed and either return an error or retry construction, depending on | |
3510 | * the timeout. | |
3511 | * | |
3512 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3513 | * try to construct a new one. | |
3514 | */ | |
3515 | struct tcon_link * | |
3516 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3517 | { | |
3518 | int ret; | |
b647c35f | 3519 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3520 | struct tcon_link *tlink, *newtlink; |
3521 | ||
3522 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3523 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3524 | ||
3525 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3526 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3527 | if (tlink) |
3528 | cifs_get_tlink(tlink); | |
3529 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3530 | ||
3531 | if (tlink == NULL) { | |
3532 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3533 | if (newtlink == NULL) | |
3534 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3535 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3536 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3537 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3538 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3539 | cifs_get_tlink(newtlink); | |
3540 | ||
9d002df4 JL |
3541 | spin_lock(&cifs_sb->tlink_tree_lock); |
3542 | /* was one inserted after previous search? */ | |
b647c35f | 3543 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3544 | if (tlink) { |
3545 | cifs_get_tlink(tlink); | |
3546 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3547 | kfree(newtlink); |
3548 | goto wait_for_construction; | |
3549 | } | |
9d002df4 | 3550 | tlink = newtlink; |
b647c35f JL |
3551 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3552 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3553 | } else { |
3554 | wait_for_construction: | |
3555 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3556 | cifs_sb_tcon_pending_wait, | |
3557 | TASK_INTERRUPTIBLE); | |
3558 | if (ret) { | |
3559 | cifs_put_tlink(tlink); | |
3560 | return ERR_PTR(ret); | |
3561 | } | |
3562 | ||
3563 | /* if it's good, return it */ | |
3564 | if (!IS_ERR(tlink->tl_tcon)) | |
3565 | return tlink; | |
3566 | ||
3567 | /* return error if we tried this already recently */ | |
3568 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3569 | cifs_put_tlink(tlink); | |
3570 | return ERR_PTR(-EACCES); | |
3571 | } | |
3572 | ||
3573 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3574 | goto wait_for_construction; | |
3575 | } | |
3576 | ||
3577 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3578 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3579 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3580 | ||
3581 | if (IS_ERR(tlink->tl_tcon)) { | |
3582 | cifs_put_tlink(tlink); | |
3583 | return ERR_PTR(-EACCES); | |
3584 | } | |
3585 | ||
3586 | return tlink; | |
3587 | } | |
2de970ff JL |
3588 | |
3589 | /* | |
3590 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3591 | * out tcons. | |
3592 | */ | |
3593 | static void | |
3594 | cifs_prune_tlinks(struct work_struct *work) | |
3595 | { | |
3596 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3597 | prune_tlinks.work); | |
b647c35f JL |
3598 | struct rb_root *root = &cifs_sb->tlink_tree; |
3599 | struct rb_node *node = rb_first(root); | |
3600 | struct rb_node *tmp; | |
3601 | struct tcon_link *tlink; | |
2de970ff | 3602 | |
b647c35f JL |
3603 | /* |
3604 | * Because we drop the spinlock in the loop in order to put the tlink | |
3605 | * it's not guarded against removal of links from the tree. The only | |
3606 | * places that remove entries from the tree are this function and | |
3607 | * umounts. Because this function is non-reentrant and is canceled | |
3608 | * before umount can proceed, this is safe. | |
3609 | */ | |
3610 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3611 | node = rb_first(root); | |
3612 | while (node != NULL) { | |
3613 | tmp = node; | |
3614 | node = rb_next(tmp); | |
3615 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3616 | ||
3617 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3618 | atomic_read(&tlink->tl_count) != 0 || | |
3619 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3620 | continue; | |
2de970ff | 3621 | |
b647c35f JL |
3622 | cifs_get_tlink(tlink); |
3623 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3624 | rb_erase(tmp, root); | |
3625 | ||
3626 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3627 | cifs_put_tlink(tlink); | |
3628 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3629 | } | |
3630 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3631 | |
3632 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3633 | TLINK_IDLE_EXPIRE); | |
3634 | } |