Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
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; |
3c1105df | 140 | struct list_head retry_list; |
50c2f753 | 141 | |
1da177e4 | 142 | spin_lock(&GlobalMid_Lock); |
469ee614 | 143 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 144 | /* the demux thread will exit normally |
1da177e4 LT |
145 | next time through the loop */ |
146 | spin_unlock(&GlobalMid_Lock); | |
147 | return rc; | |
148 | } else | |
149 | server->tcpStatus = CifsNeedReconnect; | |
150 | spin_unlock(&GlobalMid_Lock); | |
151 | server->maxBuf = 0; | |
152 | ||
b6b38f70 | 153 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
154 | |
155 | /* before reconnecting the tcp session, mark the smb session (uid) | |
156 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 157 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 158 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d JL |
159 | list_for_each(tmp, &server->smb_ses_list) { |
160 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
161 | ses->need_reconnect = true; | |
162 | ses->ipc_tid = 0; | |
f1987b44 JL |
163 | list_for_each(tmp2, &ses->tcon_list) { |
164 | tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list); | |
3b795210 | 165 | tcon->need_reconnect = true; |
1da177e4 | 166 | } |
1da177e4 | 167 | } |
3f9bcca7 | 168 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 169 | |
1da177e4 | 170 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 171 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 172 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 173 | if (server->ssocket) { |
b6b38f70 JP |
174 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
175 | server->ssocket->flags); | |
91cf45f0 | 176 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 177 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 178 | server->ssocket->state, |
b6b38f70 | 179 | server->ssocket->flags); |
1da177e4 LT |
180 | sock_release(server->ssocket); |
181 | server->ssocket = NULL; | |
182 | } | |
5d0d2882 SP |
183 | server->sequence_number = 0; |
184 | server->session_estab = false; | |
21e73393 SP |
185 | kfree(server->session_key.response); |
186 | server->session_key.response = NULL; | |
187 | server->session_key.len = 0; | |
fda35943 | 188 | server->lstrp = jiffies; |
2b84a36c | 189 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 190 | |
2b84a36c | 191 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
192 | INIT_LIST_HEAD(&retry_list); |
193 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 194 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
195 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
196 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
197 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) | |
ad8b15f0 | 198 | mid_entry->midState = MID_RETRY_NEEDED; |
3c1105df JL |
199 | list_move(&mid_entry->qhead, &retry_list); |
200 | } | |
201 | spin_unlock(&GlobalMid_Lock); | |
202 | ||
203 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
204 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
205 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
206 | list_del_init(&mid_entry->qhead); |
207 | mid_entry->callback(mid_entry); | |
1da177e4 | 208 | } |
1da177e4 | 209 | |
fd88ce93 | 210 | while (server->tcpStatus == CifsNeedReconnect) { |
6c3d8909 | 211 | try_to_freeze(); |
a9f1b85e PS |
212 | |
213 | /* we should try only the port we connected to before */ | |
214 | rc = generic_ip_connect(server); | |
fb8c4b14 | 215 | if (rc) { |
b6b38f70 | 216 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 217 | msleep(3000); |
1da177e4 LT |
218 | } else { |
219 | atomic_inc(&tcpSesReconnectCount); | |
220 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 221 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 222 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 223 | spin_unlock(&GlobalMid_Lock); |
1da177e4 LT |
224 | } |
225 | } | |
2b84a36c | 226 | |
1da177e4 LT |
227 | return rc; |
228 | } | |
229 | ||
fb8c4b14 | 230 | /* |
e4eb295d SF |
231 | return codes: |
232 | 0 not a transact2, or all data present | |
233 | >0 transact2 with that much data missing | |
234 | -EINVAL = invalid transact2 | |
235 | ||
236 | */ | |
fb8c4b14 | 237 | static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) |
e4eb295d | 238 | { |
fb8c4b14 | 239 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 240 | int remaining; |
26ec2548 | 241 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 242 | |
fb8c4b14 | 243 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
244 | return 0; |
245 | ||
fb8c4b14 SF |
246 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
247 | /* check for parm and data offset going beyond end of smb */ | |
248 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 249 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
250 | return -EINVAL; |
251 | } | |
252 | ||
253 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
254 | ||
26ec2548 JL |
255 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
256 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 257 | |
c0c7b905 | 258 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 259 | return 0; |
c0c7b905 | 260 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
261 | cFYI(1, "total data %d smaller than data in frame %d", |
262 | total_data_size, data_in_this_rsp); | |
e4eb295d | 263 | return -EINVAL; |
e4eb295d | 264 | } |
c0c7b905 JL |
265 | |
266 | remaining = total_data_size - data_in_this_rsp; | |
267 | ||
268 | cFYI(1, "missing %d bytes from transact2, check next response", | |
269 | remaining); | |
270 | if (total_data_size > maxBufSize) { | |
271 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", | |
272 | total_data_size, maxBufSize); | |
273 | return -EINVAL; | |
274 | } | |
275 | return remaining; | |
e4eb295d SF |
276 | } |
277 | ||
fb8c4b14 | 278 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
279 | { |
280 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
281 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
fb8c4b14 SF |
282 | char *data_area_of_target; |
283 | char *data_area_of_buf2; | |
26ec2548 | 284 | int remaining; |
2a2047bc JL |
285 | unsigned int byte_count, total_in_buf; |
286 | __u16 total_data_size, total_in_buf2; | |
e4eb295d | 287 | |
26ec2548 | 288 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
e4eb295d | 289 | |
26ec2548 JL |
290 | if (total_data_size != |
291 | get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount)) | |
b6b38f70 | 292 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d | 293 | |
26ec2548 | 294 | total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d SF |
295 | |
296 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 297 | |
fb8c4b14 | 298 | if (remaining < 0) |
2a2047bc | 299 | return -EPROTO; |
e4eb295d | 300 | |
fb8c4b14 | 301 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 302 | return 0; |
50c2f753 | 303 | |
26ec2548 | 304 | total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 305 | if (remaining < total_in_buf2) { |
b6b38f70 | 306 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
307 | } |
308 | ||
309 | /* find end of first SMB data area */ | |
fb8c4b14 | 310 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 311 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d SF |
312 | /* validate target area */ |
313 | ||
26ec2548 JL |
314 | data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol + |
315 | get_unaligned_le16(&pSMB2->t2_rsp.DataOffset); | |
e4eb295d SF |
316 | |
317 | data_area_of_target += total_in_buf; | |
318 | ||
319 | /* copy second buffer into end of first buffer */ | |
e4eb295d | 320 | total_in_buf += total_in_buf2; |
2a2047bc JL |
321 | /* is the result too big for the field? */ |
322 | if (total_in_buf > USHRT_MAX) | |
323 | return -EPROTO; | |
26ec2548 | 324 | put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); |
2a2047bc JL |
325 | |
326 | /* fix up the BCC */ | |
820a803f | 327 | byte_count = get_bcc(pTargetSMB); |
e4eb295d | 328 | byte_count += total_in_buf2; |
2a2047bc JL |
329 | /* is the result too big for the field? */ |
330 | if (byte_count > USHRT_MAX) | |
331 | return -EPROTO; | |
820a803f | 332 | put_bcc(byte_count, pTargetSMB); |
e4eb295d | 333 | |
be8e3b00 | 334 | byte_count = be32_to_cpu(pTargetSMB->smb_buf_length); |
e4eb295d | 335 | byte_count += total_in_buf2; |
2a2047bc JL |
336 | /* don't allow buffer to overflow */ |
337 | if (byte_count > CIFSMaxBufSize) | |
338 | return -ENOBUFS; | |
be8e3b00 | 339 | pTargetSMB->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 340 | |
2a2047bc JL |
341 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
342 | ||
fb8c4b14 | 343 | if (remaining == total_in_buf2) { |
b6b38f70 | 344 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
345 | return 0; /* we are done */ |
346 | } else /* more responses to go */ | |
347 | return 1; | |
e4eb295d SF |
348 | } |
349 | ||
c74093b6 JL |
350 | static void |
351 | cifs_echo_request(struct work_struct *work) | |
352 | { | |
353 | int rc; | |
354 | struct TCP_Server_Info *server = container_of(work, | |
355 | struct TCP_Server_Info, echo.work); | |
356 | ||
247ec9b4 | 357 | /* |
195291e6 JL |
358 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
359 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
360 | * we got a response recently | |
247ec9b4 | 361 | */ |
195291e6 | 362 | if (server->maxBuf == 0 || |
247ec9b4 | 363 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
364 | goto requeue_echo; |
365 | ||
366 | rc = CIFSSMBEcho(server); | |
367 | if (rc) | |
368 | cFYI(1, "Unable to send echo request to server: %s", | |
369 | server->hostname); | |
370 | ||
371 | requeue_echo: | |
372 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); | |
373 | } | |
374 | ||
1da177e4 LT |
375 | static int |
376 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
377 | { | |
378 | int length; | |
379 | unsigned int pdu_length, total_read; | |
380 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
381 | struct smb_hdr *bigbuf = NULL; |
382 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
383 | struct msghdr smb_msg; |
384 | struct kvec iov; | |
385 | struct socket *csocket = server->ssocket; | |
2b84a36c | 386 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
387 | struct task_struct *task_to_wake = NULL; |
388 | struct mid_q_entry *mid_entry; | |
70ca734a | 389 | char temp; |
4b18f2a9 SF |
390 | bool isLargeBuf = false; |
391 | bool isMultiRsp; | |
e4eb295d | 392 | int reconnect; |
1da177e4 | 393 | |
1da177e4 | 394 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 395 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
396 | |
397 | length = atomic_inc_return(&tcpSesAllocCount); | |
398 | if (length > 1) | |
26f57364 SF |
399 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
400 | GFP_KERNEL); | |
1da177e4 | 401 | |
83144186 | 402 | set_freezable(); |
469ee614 | 403 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
404 | if (try_to_freeze()) |
405 | continue; | |
b8643e1b SF |
406 | if (bigbuf == NULL) { |
407 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 408 | if (!bigbuf) { |
b6b38f70 | 409 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
410 | msleep(3000); |
411 | /* retry will check if exiting */ | |
412 | continue; | |
413 | } | |
0fd1ffe0 PM |
414 | } else if (isLargeBuf) { |
415 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 416 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 417 | } |
b8643e1b SF |
418 | |
419 | if (smallbuf == NULL) { | |
420 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 421 | if (!smallbuf) { |
b6b38f70 | 422 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
423 | msleep(1000); |
424 | /* retry will check if exiting */ | |
425 | continue; | |
426 | } | |
427 | /* beginning of smb buffer is cleared in our buf_get */ | |
428 | } else /* if existing small buf clear beginning */ | |
26f57364 | 429 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 430 | |
4b18f2a9 SF |
431 | isLargeBuf = false; |
432 | isMultiRsp = false; | |
b8643e1b | 433 | smb_buffer = smallbuf; |
1da177e4 LT |
434 | iov.iov_base = smb_buffer; |
435 | iov.iov_len = 4; | |
436 | smb_msg.msg_control = NULL; | |
437 | smb_msg.msg_controllen = 0; | |
f01d5e14 | 438 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 439 | |
f01d5e14 | 440 | incomplete_rcv: |
fd88ce93 | 441 | if (echo_retries > 0 && server->tcpStatus == CifsGood && |
fda35943 SF |
442 | time_after(jiffies, server->lstrp + |
443 | (echo_retries * SMB_ECHO_INTERVAL))) { | |
444 | cERROR(1, "Server %s has not responded in %d seconds. " | |
445 | "Reconnecting...", server->hostname, | |
446 | (echo_retries * SMB_ECHO_INTERVAL / HZ)); | |
447 | cifs_reconnect(server); | |
448 | csocket = server->ssocket; | |
449 | wake_up(&server->response_q); | |
450 | continue; | |
451 | } | |
452 | ||
1da177e4 LT |
453 | length = |
454 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 455 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 456 | |
469ee614 | 457 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
458 | break; |
459 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 460 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 461 | cifs_reconnect(server); |
b6b38f70 | 462 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
463 | csocket = server->ssocket; |
464 | continue; | |
522bbe65 JL |
465 | } else if (length == -ERESTARTSYS || |
466 | length == -EAGAIN || | |
467 | length == -EINTR) { | |
b8643e1b | 468 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
469 | allowing socket to clear and app threads to set |
470 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
471 | if (pdu_length < 4) { |
472 | iov.iov_base = (4 - pdu_length) + | |
473 | (char *)smb_buffer; | |
474 | iov.iov_len = pdu_length; | |
475 | smb_msg.msg_control = NULL; | |
476 | smb_msg.msg_controllen = 0; | |
c18c732e | 477 | goto incomplete_rcv; |
c527c8a7 | 478 | } else |
c18c732e | 479 | continue; |
1da177e4 | 480 | } else if (length <= 0) { |
b6b38f70 JP |
481 | cFYI(1, "Reconnect after unexpected peek error %d", |
482 | length); | |
1da177e4 LT |
483 | cifs_reconnect(server); |
484 | csocket = server->ssocket; | |
485 | wake_up(&server->response_q); | |
486 | continue; | |
2a974680 | 487 | } else if (length < pdu_length) { |
b6b38f70 JP |
488 | cFYI(1, "requested %d bytes but only got %d bytes", |
489 | pdu_length, length); | |
f01d5e14 | 490 | pdu_length -= length; |
f01d5e14 SF |
491 | msleep(1); |
492 | goto incomplete_rcv; | |
46810cbf | 493 | } |
1da177e4 | 494 | |
70ca734a SF |
495 | /* The right amount was read from socket - 4 bytes */ |
496 | /* so we can now interpret the length field */ | |
46810cbf | 497 | |
70ca734a SF |
498 | /* the first byte big endian of the length field, |
499 | is actually not part of the length but the type | |
500 | with the most common, zero, as regular data */ | |
501 | temp = *((char *) smb_buffer); | |
46810cbf | 502 | |
fb8c4b14 | 503 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
504 | but we convert it here so it is always manipulated |
505 | as host byte order */ | |
be8e3b00 | 506 | pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
70ca734a | 507 | |
b6b38f70 | 508 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 509 | |
70ca734a | 510 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 511 | continue; |
70ca734a | 512 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 513 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 514 | continue; |
70ca734a | 515 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 516 | /* we get this from Windows 98 instead of |
46810cbf | 517 | an error on SMB negprot response */ |
b6b38f70 JP |
518 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
519 | pdu_length); | |
7332f2a6 JL |
520 | /* give server a second to clean up */ |
521 | msleep(1000); | |
522 | /* always try 445 first on reconnect since we get NACK | |
523 | * on some if we ever connected to port 139 (the NACK | |
524 | * is since we do not begin with RFC1001 session | |
525 | * initialize frame) | |
526 | */ | |
32670396 | 527 | cifs_set_port((struct sockaddr *) |
a9f1b85e | 528 | &server->dstaddr, CIFS_PORT); |
7332f2a6 JL |
529 | cifs_reconnect(server); |
530 | csocket = server->ssocket; | |
531 | wake_up(&server->response_q); | |
532 | continue; | |
70ca734a | 533 | } else if (temp != (char) 0) { |
b6b38f70 | 534 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
535 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
536 | length); | |
46810cbf SF |
537 | cifs_reconnect(server); |
538 | csocket = server->ssocket; | |
539 | continue; | |
e4eb295d SF |
540 | } |
541 | ||
542 | /* else we have an SMB response */ | |
fb8c4b14 | 543 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 544 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
545 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
546 | length, pdu_length+4); | |
e4eb295d SF |
547 | cifs_reconnect(server); |
548 | csocket = server->ssocket; | |
549 | wake_up(&server->response_q); | |
550 | continue; | |
fb8c4b14 | 551 | } |
e4eb295d SF |
552 | |
553 | /* else length ok */ | |
554 | reconnect = 0; | |
555 | ||
fb8c4b14 | 556 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 557 | isLargeBuf = true; |
e4eb295d SF |
558 | memcpy(bigbuf, smallbuf, 4); |
559 | smb_buffer = bigbuf; | |
560 | } | |
561 | length = 0; | |
562 | iov.iov_base = 4 + (char *)smb_buffer; | |
563 | iov.iov_len = pdu_length; | |
fb8c4b14 | 564 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
565 | total_read += length) { |
566 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
567 | pdu_length - total_read, 0); | |
522bbe65 | 568 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
569 | /* then will exit */ |
570 | reconnect = 2; | |
571 | break; | |
572 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
573 | cifs_reconnect(server); |
574 | csocket = server->ssocket; | |
fb8c4b14 | 575 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
576 | /* Now we will reread sock */ |
577 | reconnect = 1; | |
578 | break; | |
522bbe65 JL |
579 | } else if (length == -ERESTARTSYS || |
580 | length == -EAGAIN || | |
581 | length == -EINTR) { | |
e4eb295d | 582 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 583 | allowing socket to clear and app |
e4eb295d SF |
584 | threads to set tcpStatus |
585 | CifsNeedReconnect if server hung*/ | |
c18c732e | 586 | length = 0; |
46810cbf | 587 | continue; |
e4eb295d | 588 | } else if (length <= 0) { |
b6b38f70 JP |
589 | cERROR(1, "Received no data, expecting %d", |
590 | pdu_length - total_read); | |
e4eb295d SF |
591 | cifs_reconnect(server); |
592 | csocket = server->ssocket; | |
593 | reconnect = 1; | |
594 | break; | |
46810cbf | 595 | } |
e4eb295d | 596 | } |
fb8c4b14 | 597 | if (reconnect == 2) |
e4eb295d | 598 | break; |
fb8c4b14 | 599 | else if (reconnect == 1) |
e4eb295d | 600 | continue; |
1da177e4 | 601 | |
9587fcff | 602 | total_read += 4; /* account for rfc1002 hdr */ |
50c2f753 | 603 | |
9587fcff | 604 | dump_smb(smb_buffer, total_read); |
71823baf JL |
605 | |
606 | /* | |
607 | * We know that we received enough to get to the MID as we | |
608 | * checked the pdu_length earlier. Now check to see | |
609 | * if the rest of the header is OK. We borrow the length | |
610 | * var for the rest of the loop to avoid a new stack var. | |
611 | * | |
612 | * 48 bytes is enough to display the header and a little bit | |
613 | * into the payload for debugging purposes. | |
614 | */ | |
615 | length = checkSMB(smb_buffer, smb_buffer->Mid, total_read); | |
616 | if (length != 0) | |
9587fcff | 617 | cifs_dump_mem("Bad SMB: ", smb_buffer, |
71823baf | 618 | min_t(unsigned int, total_read, 48)); |
1da177e4 | 619 | |
2b84a36c | 620 | mid_entry = NULL; |
fda35943 SF |
621 | server->lstrp = jiffies; |
622 | ||
e4eb295d | 623 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 624 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
e4eb295d SF |
625 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
626 | ||
146f9f65 JL |
627 | if (mid_entry->mid != smb_buffer->Mid || |
628 | mid_entry->midState != MID_REQUEST_SUBMITTED || | |
629 | mid_entry->command != smb_buffer->Command) { | |
630 | mid_entry = NULL; | |
631 | continue; | |
632 | } | |
633 | ||
634 | if (length == 0 && | |
635 | check2ndT2(smb_buffer, server->maxBuf) > 0) { | |
636 | /* We have a multipart transact2 resp */ | |
637 | isMultiRsp = true; | |
638 | if (mid_entry->resp_buf) { | |
639 | /* merge response - fix up 1st*/ | |
16541ba1 JL |
640 | length = coalesce_t2(smb_buffer, |
641 | mid_entry->resp_buf); | |
642 | if (length > 0) { | |
643 | length = 0; | |
146f9f65 JL |
644 | mid_entry->multiRsp = true; |
645 | break; | |
e4eb295d | 646 | } else { |
16541ba1 JL |
647 | /* all parts received or |
648 | * packet is malformed | |
649 | */ | |
146f9f65 JL |
650 | mid_entry->multiEnd = true; |
651 | goto multi_t2_fnd; | |
652 | } | |
653 | } else { | |
654 | if (!isLargeBuf) { | |
655 | /* | |
656 | * FIXME: switch to already | |
657 | * allocated largebuf? | |
658 | */ | |
659 | cERROR(1, "1st trans2 resp " | |
660 | "needs bigbuf"); | |
661 | } else { | |
662 | /* Have first buffer */ | |
663 | mid_entry->resp_buf = | |
664 | smb_buffer; | |
665 | mid_entry->largeBuf = true; | |
666 | bigbuf = NULL; | |
e4eb295d | 667 | } |
50c2f753 | 668 | } |
146f9f65 JL |
669 | break; |
670 | } | |
671 | mid_entry->resp_buf = smb_buffer; | |
672 | mid_entry->largeBuf = isLargeBuf; | |
e4eb295d | 673 | multi_t2_fnd: |
146f9f65 JL |
674 | if (length == 0) |
675 | mid_entry->midState = MID_RESPONSE_RECEIVED; | |
676 | else | |
677 | mid_entry->midState = MID_RESPONSE_MALFORMED; | |
1047abc1 | 678 | #ifdef CONFIG_CIFS_STATS2 |
146f9f65 | 679 | mid_entry->when_received = jiffies; |
1047abc1 | 680 | #endif |
146f9f65 | 681 | list_del_init(&mid_entry->qhead); |
146f9f65 | 682 | break; |
1da177e4 | 683 | } |
e4eb295d | 684 | spin_unlock(&GlobalMid_Lock); |
2b84a36c JL |
685 | |
686 | if (mid_entry != NULL) { | |
3c1105df | 687 | mid_entry->callback(mid_entry); |
cd63499c | 688 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 689 | if (!isMultiRsp) { |
cd63499c | 690 | /* smb buffer will be freed by user thread */ |
26f57364 | 691 | if (isLargeBuf) |
cd63499c | 692 | bigbuf = NULL; |
26f57364 | 693 | else |
cd63499c SF |
694 | smallbuf = NULL; |
695 | } | |
71823baf JL |
696 | } else if (length != 0) { |
697 | /* response sanity checks failed */ | |
698 | continue; | |
4b18f2a9 SF |
699 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
700 | !isMultiRsp) { | |
b6b38f70 | 701 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 702 | "NumMids %d", atomic_read(&midCount)); |
50c2f753 | 703 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 704 | sizeof(struct smb_hdr)); |
3979877e SF |
705 | #ifdef CONFIG_CIFS_DEBUG2 |
706 | cifs_dump_detail(smb_buffer); | |
707 | cifs_dump_mids(server); | |
708 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 709 | |
e4eb295d SF |
710 | } |
711 | } /* end while !EXITING */ | |
712 | ||
e7ddee90 | 713 | /* take it off the list, if it's not already */ |
3f9bcca7 | 714 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 715 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 716 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 717 | |
1da177e4 LT |
718 | spin_lock(&GlobalMid_Lock); |
719 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 720 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 721 | wake_up_all(&server->response_q); |
e691b9d1 | 722 | |
31ca3bc3 SF |
723 | /* check if we have blocked requests that need to free */ |
724 | /* Note that cifs_max_pending is normally 50, but | |
725 | can be set at module install time to as little as two */ | |
e691b9d1 | 726 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 727 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
728 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
729 | /* We do not want to set the max_pending too low or we | |
730 | could end up with the counter going negative */ | |
1da177e4 | 731 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 732 | /* Although there should not be any requests blocked on |
1da177e4 | 733 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 734 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
735 | to the same server - they now will see the session is in exit state |
736 | and get out of SendReceive. */ | |
737 | wake_up_all(&server->request_q); | |
738 | /* give those requests time to exit */ | |
b8643e1b | 739 | msleep(125); |
50c2f753 | 740 | |
fb8c4b14 | 741 | if (server->ssocket) { |
1da177e4 LT |
742 | sock_release(csocket); |
743 | server->ssocket = NULL; | |
744 | } | |
fd62cb7e | 745 | /* buffer usually freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
746 | cifs_buf_release(bigbuf); |
747 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 748 | cifs_small_buf_release(smallbuf); |
1da177e4 | 749 | |
9d78315b | 750 | if (!list_empty(&server->pending_mid_q)) { |
3c1105df JL |
751 | struct list_head dispose_list; |
752 | ||
753 | INIT_LIST_HEAD(&dispose_list); | |
1da177e4 | 754 | spin_lock(&GlobalMid_Lock); |
2b84a36c | 755 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
9d78315b | 756 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
3c1105df JL |
757 | cFYI(1, "Clearing mid 0x%x", mid_entry->mid); |
758 | mid_entry->midState = MID_SHUTDOWN; | |
759 | list_move(&mid_entry->qhead, &dispose_list); | |
760 | } | |
761 | spin_unlock(&GlobalMid_Lock); | |
762 | ||
763 | /* now walk dispose list and issue callbacks */ | |
764 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
765 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
766 | cFYI(1, "Callback mid 0x%x", mid_entry->mid); | |
2b84a36c JL |
767 | list_del_init(&mid_entry->qhead); |
768 | mid_entry->callback(mid_entry); | |
1da177e4 | 769 | } |
1da177e4 | 770 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 771 | msleep(125); |
1da177e4 LT |
772 | } |
773 | ||
f191401f | 774 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 775 | /* mpx threads have not exited yet give them |
1da177e4 | 776 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
777 | /* due to delays on oplock break requests, we need |
778 | to wait at least 45 seconds before giving up | |
779 | on a request getting a response and going ahead | |
780 | and killing cifsd */ | |
b6b38f70 | 781 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 782 | msleep(46000); |
1da177e4 LT |
783 | /* if threads still have not exited they are probably never |
784 | coming home not much else we can do but free the memory */ | |
785 | } | |
1da177e4 | 786 | |
c359cf3c | 787 | kfree(server->hostname); |
b1c8d2b4 | 788 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 789 | kfree(server); |
93d0ec85 JL |
790 | |
791 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
792 | if (length > 0) |
793 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
794 | GFP_KERNEL); | |
50c2f753 | 795 | |
b1c8d2b4 JL |
796 | /* if server->tsk was NULL then wait for a signal before exiting */ |
797 | if (!task_to_wake) { | |
798 | set_current_state(TASK_INTERRUPTIBLE); | |
799 | while (!signal_pending(current)) { | |
800 | schedule(); | |
801 | set_current_state(TASK_INTERRUPTIBLE); | |
802 | } | |
803 | set_current_state(TASK_RUNNING); | |
804 | } | |
805 | ||
0468a2cf | 806 | module_put_and_exit(0); |
1da177e4 LT |
807 | } |
808 | ||
c359cf3c JL |
809 | /* extract the host portion of the UNC string */ |
810 | static char * | |
811 | extract_hostname(const char *unc) | |
812 | { | |
813 | const char *src; | |
814 | char *dst, *delim; | |
815 | unsigned int len; | |
816 | ||
817 | /* skip double chars at beginning of string */ | |
818 | /* BB: check validity of these bytes? */ | |
819 | src = unc + 2; | |
820 | ||
821 | /* delimiter between hostname and sharename is always '\\' now */ | |
822 | delim = strchr(src, '\\'); | |
823 | if (!delim) | |
824 | return ERR_PTR(-EINVAL); | |
825 | ||
826 | len = delim - src; | |
827 | dst = kmalloc((len + 1), GFP_KERNEL); | |
828 | if (dst == NULL) | |
829 | return ERR_PTR(-ENOMEM); | |
830 | ||
831 | memcpy(dst, src, len); | |
832 | dst[len] = '\0'; | |
833 | ||
834 | return dst; | |
835 | } | |
836 | ||
1da177e4 | 837 | static int |
b946845a | 838 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 839 | struct smb_vol *vol) |
1da177e4 | 840 | { |
4906e50b | 841 | char *value, *data, *end; |
b946845a | 842 | char *mountdata_copy, *options; |
1da177e4 LT |
843 | unsigned int temp_len, i, j; |
844 | char separator[2]; | |
9b9d6b24 JL |
845 | short int override_uid = -1; |
846 | short int override_gid = -1; | |
847 | bool uid_specified = false; | |
848 | bool gid_specified = false; | |
88463999 | 849 | char *nodename = utsname()->nodename; |
1da177e4 LT |
850 | |
851 | separator[0] = ','; | |
50c2f753 | 852 | separator[1] = 0; |
1da177e4 | 853 | |
88463999 JL |
854 | /* |
855 | * does not have to be perfect mapping since field is | |
856 | * informational, only used for servers that do not support | |
857 | * port 445 and it can be overridden at mount time | |
858 | */ | |
1397f2ee JL |
859 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
860 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
861 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
862 | ||
1397f2ee | 863 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
864 | /* null target name indicates to use *SMBSERVR default called name |
865 | if we end up sending RFC1001 session initialize */ | |
866 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
867 | vol->cred_uid = current_uid(); |
868 | vol->linux_uid = current_uid(); | |
a001e5b5 | 869 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
870 | |
871 | /* default to only allowing write access to owner of the mount */ | |
872 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
873 | |
874 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
875 | /* default is always to request posix paths. */ |
876 | vol->posix_paths = 1; | |
a0c9217f JL |
877 | /* default to using server inode numbers where available */ |
878 | vol->server_ino = 1; | |
ac67055e | 879 | |
6d20e840 SJ |
880 | vol->actimeo = CIFS_DEF_ACTIMEO; |
881 | ||
b946845a SF |
882 | if (!mountdata) |
883 | goto cifs_parse_mount_err; | |
884 | ||
885 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
886 | if (!mountdata_copy) | |
887 | goto cifs_parse_mount_err; | |
1da177e4 | 888 | |
b946845a | 889 | options = mountdata_copy; |
4906e50b | 890 | end = options + strlen(options); |
50c2f753 | 891 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 892 | if (options[4] != 0) { |
1da177e4 LT |
893 | separator[0] = options[4]; |
894 | options += 5; | |
895 | } else { | |
b6b38f70 | 896 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
897 | } |
898 | } | |
50c2f753 | 899 | |
1da177e4 LT |
900 | while ((data = strsep(&options, separator)) != NULL) { |
901 | if (!*data) | |
902 | continue; | |
903 | if ((value = strchr(data, '=')) != NULL) | |
904 | *value++ = '\0'; | |
905 | ||
50c2f753 SF |
906 | /* Have to parse this before we parse for "user" */ |
907 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 908 | vol->no_xattr = 0; |
50c2f753 | 909 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
910 | vol->no_xattr = 1; |
911 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 912 | if (!value) { |
1da177e4 LT |
913 | printk(KERN_WARNING |
914 | "CIFS: invalid or missing username\n"); | |
b946845a | 915 | goto cifs_parse_mount_err; |
fb8c4b14 | 916 | } else if (!*value) { |
4b952a9b SF |
917 | /* null user, ie anonymous, authentication */ |
918 | vol->nullauth = 1; | |
1da177e4 | 919 | } |
8727c8a8 SF |
920 | if (strnlen(value, MAX_USERNAME_SIZE) < |
921 | MAX_USERNAME_SIZE) { | |
b946845a SF |
922 | vol->username = kstrdup(value, GFP_KERNEL); |
923 | if (!vol->username) { | |
924 | printk(KERN_WARNING "CIFS: no memory " | |
925 | "for username\n"); | |
926 | goto cifs_parse_mount_err; | |
927 | } | |
1da177e4 LT |
928 | } else { |
929 | printk(KERN_WARNING "CIFS: username too long\n"); | |
b946845a | 930 | goto cifs_parse_mount_err; |
1da177e4 LT |
931 | } |
932 | } else if (strnicmp(data, "pass", 4) == 0) { | |
933 | if (!value) { | |
934 | vol->password = NULL; | |
935 | continue; | |
fb8c4b14 | 936 | } else if (value[0] == 0) { |
1da177e4 LT |
937 | /* check if string begins with double comma |
938 | since that would mean the password really | |
939 | does start with a comma, and would not | |
940 | indicate an empty string */ | |
fb8c4b14 | 941 | if (value[1] != separator[0]) { |
1da177e4 LT |
942 | vol->password = NULL; |
943 | continue; | |
944 | } | |
945 | } | |
946 | temp_len = strlen(value); | |
947 | /* removed password length check, NTLM passwords | |
948 | can be arbitrarily long */ | |
949 | ||
50c2f753 | 950 | /* if comma in password, the string will be |
1da177e4 LT |
951 | prematurely null terminated. Commas in password are |
952 | specified across the cifs mount interface by a double | |
953 | comma ie ,, and a comma used as in other cases ie ',' | |
954 | as a parameter delimiter/separator is single and due | |
955 | to the strsep above is temporarily zeroed. */ | |
956 | ||
957 | /* NB: password legally can have multiple commas and | |
958 | the only illegal character in a password is null */ | |
959 | ||
50c2f753 | 960 | if ((value[temp_len] == 0) && |
4906e50b | 961 | (value + temp_len < end) && |
09d1db5c | 962 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
963 | /* reinsert comma */ |
964 | value[temp_len] = separator[0]; | |
50c2f753 SF |
965 | temp_len += 2; /* move after second comma */ |
966 | while (value[temp_len] != 0) { | |
1da177e4 | 967 | if (value[temp_len] == separator[0]) { |
50c2f753 | 968 | if (value[temp_len+1] == |
09d1db5c SF |
969 | separator[0]) { |
970 | /* skip second comma */ | |
971 | temp_len++; | |
50c2f753 | 972 | } else { |
1da177e4 LT |
973 | /* single comma indicating start |
974 | of next parm */ | |
975 | break; | |
976 | } | |
977 | } | |
978 | temp_len++; | |
979 | } | |
fb8c4b14 | 980 | if (value[temp_len] == 0) { |
1da177e4 LT |
981 | options = NULL; |
982 | } else { | |
983 | value[temp_len] = 0; | |
984 | /* point option to start of next parm */ | |
985 | options = value + temp_len + 1; | |
986 | } | |
50c2f753 | 987 | /* go from value to value + temp_len condensing |
1da177e4 LT |
988 | double commas to singles. Note that this ends up |
989 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 990 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 991 | if (vol->password == NULL) { |
50c2f753 SF |
992 | printk(KERN_WARNING "CIFS: no memory " |
993 | "for password\n"); | |
b946845a | 994 | goto cifs_parse_mount_err; |
433dc24f | 995 | } |
50c2f753 | 996 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 997 | vol->password[j] = value[i]; |
fb8c4b14 | 998 | if (value[i] == separator[0] |
09d1db5c | 999 | && value[i+1] == separator[0]) { |
1da177e4 LT |
1000 | /* skip second comma */ |
1001 | i++; | |
1002 | } | |
1003 | } | |
1004 | vol->password[j] = 0; | |
1005 | } else { | |
e915fc49 | 1006 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 1007 | if (vol->password == NULL) { |
50c2f753 SF |
1008 | printk(KERN_WARNING "CIFS: no memory " |
1009 | "for password\n"); | |
b946845a | 1010 | goto cifs_parse_mount_err; |
433dc24f | 1011 | } |
1da177e4 LT |
1012 | strcpy(vol->password, value); |
1013 | } | |
58f7f68f JL |
1014 | } else if (!strnicmp(data, "ip", 2) || |
1015 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
1016 | if (!value || !*value) { |
1017 | vol->UNCip = NULL; | |
50b64e3b JL |
1018 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
1019 | INET6_ADDRSTRLEN) { | |
b946845a SF |
1020 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
1021 | if (!vol->UNCip) { | |
1022 | printk(KERN_WARNING "CIFS: no memory " | |
1023 | "for UNC IP\n"); | |
1024 | goto cifs_parse_mount_err; | |
1025 | } | |
1da177e4 | 1026 | } else { |
50c2f753 SF |
1027 | printk(KERN_WARNING "CIFS: ip address " |
1028 | "too long\n"); | |
b946845a | 1029 | goto cifs_parse_mount_err; |
1da177e4 | 1030 | } |
50c2f753 SF |
1031 | } else if (strnicmp(data, "sec", 3) == 0) { |
1032 | if (!value || !*value) { | |
b6b38f70 | 1033 | cERROR(1, "no security value specified"); |
50c2f753 SF |
1034 | continue; |
1035 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
1036 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 1037 | CIFSSEC_MUST_SIGN; |
bf820679 | 1038 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
1039 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
1040 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 1041 | cERROR(1, "Krb5 cifs privacy not supported"); |
b946845a | 1042 | goto cifs_parse_mount_err; |
bf820679 | 1043 | } else if (strnicmp(value, "krb5", 4) == 0) { |
750d1151 | 1044 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
1045 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
1046 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
1047 | CIFSSEC_MUST_SIGN; | |
1048 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
1049 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
bf820679 | 1050 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 1051 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 1052 | CIFSSEC_MUST_SIGN; |
bf820679 | 1053 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 1054 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 1055 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 1056 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 1057 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
1058 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
1059 | /* ntlm is default so can be turned off too */ | |
750d1151 | 1060 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 1061 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 1062 | /* BB is there a better way to do this? */ |
750d1151 | 1063 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
1064 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
1065 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 1066 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1067 | #endif |
bf820679 | 1068 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1069 | vol->nullauth = 1; |
50c2f753 | 1070 | } else { |
b6b38f70 | 1071 | cERROR(1, "bad security option: %s", value); |
b946845a | 1072 | goto cifs_parse_mount_err; |
50c2f753 | 1073 | } |
1cb06d0b SF |
1074 | } else if (strnicmp(data, "vers", 3) == 0) { |
1075 | if (!value || !*value) { | |
1076 | cERROR(1, "no protocol version specified" | |
1077 | " after vers= mount option"); | |
1078 | } else if ((strnicmp(value, "cifs", 4) == 0) || | |
1079 | (strnicmp(value, "1", 1) == 0)) { | |
1080 | /* this is the default */ | |
1081 | continue; | |
1cb06d0b | 1082 | } |
1da177e4 LT |
1083 | } else if ((strnicmp(data, "unc", 3) == 0) |
1084 | || (strnicmp(data, "target", 6) == 0) | |
1085 | || (strnicmp(data, "path", 4) == 0)) { | |
1086 | if (!value || !*value) { | |
50c2f753 SF |
1087 | printk(KERN_WARNING "CIFS: invalid path to " |
1088 | "network resource\n"); | |
b946845a | 1089 | goto cifs_parse_mount_err; |
1da177e4 LT |
1090 | } |
1091 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1092 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1093 | if (vol->UNC == NULL) |
b946845a | 1094 | goto cifs_parse_mount_err; |
50c2f753 | 1095 | strcpy(vol->UNC, value); |
1da177e4 LT |
1096 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1097 | vol->UNC[0] = '\\'; | |
1098 | vol->UNC[1] = '\\'; | |
50c2f753 | 1099 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1100 | printk(KERN_WARNING |
50c2f753 SF |
1101 | "CIFS: UNC Path does not begin " |
1102 | "with // or \\\\ \n"); | |
b946845a | 1103 | goto cifs_parse_mount_err; |
1da177e4 LT |
1104 | } |
1105 | } else { | |
1106 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1107 | goto cifs_parse_mount_err; |
1da177e4 LT |
1108 | } |
1109 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1110 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1111 | if (!value || !*value) { | |
1112 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
b946845a | 1113 | goto cifs_parse_mount_err; |
1da177e4 LT |
1114 | } |
1115 | /* BB are there cases in which a comma can be valid in | |
1116 | a domain name and need special handling? */ | |
3979877e | 1117 | if (strnlen(value, 256) < 256) { |
b946845a SF |
1118 | vol->domainname = kstrdup(value, GFP_KERNEL); |
1119 | if (!vol->domainname) { | |
1120 | printk(KERN_WARNING "CIFS: no memory " | |
1121 | "for domainname\n"); | |
1122 | goto cifs_parse_mount_err; | |
1123 | } | |
b6b38f70 | 1124 | cFYI(1, "Domain name set"); |
1da177e4 | 1125 | } else { |
50c2f753 SF |
1126 | printk(KERN_WARNING "CIFS: domain name too " |
1127 | "long\n"); | |
b946845a | 1128 | goto cifs_parse_mount_err; |
1da177e4 | 1129 | } |
3eb9a889 BG |
1130 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
1131 | vol->srcaddr.ss_family = AF_UNSPEC; | |
1132 | ||
1133 | if (!value || !*value) { | |
1134 | printk(KERN_WARNING "CIFS: srcaddr value" | |
1135 | " not specified.\n"); | |
b946845a | 1136 | goto cifs_parse_mount_err; |
3eb9a889 BG |
1137 | } |
1138 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, | |
1139 | value, strlen(value)); | |
b235f371 | 1140 | if (i == 0) { |
3eb9a889 BG |
1141 | printk(KERN_WARNING "CIFS: Could not parse" |
1142 | " srcaddr: %s\n", | |
1143 | value); | |
b946845a | 1144 | goto cifs_parse_mount_err; |
3eb9a889 | 1145 | } |
50c2f753 SF |
1146 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1147 | if (!value || !*value) { | |
1148 | printk(KERN_WARNING | |
1149 | "CIFS: invalid path prefix\n"); | |
b946845a | 1150 | goto cifs_parse_mount_err; |
50c2f753 SF |
1151 | } |
1152 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1153 | if (value[0] != '/') |
2fe87f02 | 1154 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1155 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1156 | if (vol->prepath == NULL) | |
b946845a | 1157 | goto cifs_parse_mount_err; |
4523cc30 | 1158 | if (value[0] != '/') { |
2fe87f02 | 1159 | vol->prepath[0] = '/'; |
50c2f753 | 1160 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1161 | } else |
50c2f753 | 1162 | strcpy(vol->prepath, value); |
b6b38f70 | 1163 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1164 | } else { |
1165 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
b946845a | 1166 | goto cifs_parse_mount_err; |
50c2f753 | 1167 | } |
1da177e4 LT |
1168 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1169 | if (!value || !*value) { | |
63135e08 SF |
1170 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1171 | "specified\n"); | |
b946845a | 1172 | goto cifs_parse_mount_err; |
1da177e4 LT |
1173 | } |
1174 | if (strnlen(value, 65) < 65) { | |
b946845a SF |
1175 | if (strnicmp(value, "default", 7)) { |
1176 | vol->iocharset = kstrdup(value, | |
1177 | GFP_KERNEL); | |
1178 | ||
1179 | if (!vol->iocharset) { | |
1180 | printk(KERN_WARNING "CIFS: no " | |
1181 | "memory for" | |
1182 | "charset\n"); | |
1183 | goto cifs_parse_mount_err; | |
1184 | } | |
1185 | } | |
50c2f753 SF |
1186 | /* if iocharset not set then load_nls_default |
1187 | is used by caller */ | |
b6b38f70 | 1188 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1189 | } else { |
63135e08 SF |
1190 | printk(KERN_WARNING "CIFS: iocharset name " |
1191 | "too long.\n"); | |
b946845a | 1192 | goto cifs_parse_mount_err; |
1da177e4 | 1193 | } |
9b9d6b24 JL |
1194 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1195 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1196 | uid_specified = true; | |
bd763319 JL |
1197 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
1198 | vol->cred_uid = simple_strtoul(value, &value, 0); | |
9b9d6b24 JL |
1199 | } else if (!strnicmp(data, "forceuid", 8)) { |
1200 | override_uid = 1; | |
1201 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1202 | override_uid = 0; | |
1203 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1204 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1205 | gid_specified = true; | |
1206 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1207 | override_gid = 1; | |
1208 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1209 | override_gid = 0; | |
1da177e4 LT |
1210 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1211 | if (value && *value) { | |
1212 | vol->file_mode = | |
1213 | simple_strtoul(value, &value, 0); | |
1214 | } | |
1215 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1216 | if (value && *value) { | |
1217 | vol->dir_mode = | |
1218 | simple_strtoul(value, &value, 0); | |
1219 | } | |
1220 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1221 | if (value && *value) { | |
1222 | vol->dir_mode = | |
1223 | simple_strtoul(value, &value, 0); | |
1224 | } | |
1225 | } else if (strnicmp(data, "port", 4) == 0) { | |
1226 | if (value && *value) { | |
1227 | vol->port = | |
1228 | simple_strtoul(value, &value, 0); | |
1229 | } | |
1230 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1231 | if (value && *value) { | |
1232 | vol->rsize = | |
1233 | simple_strtoul(value, &value, 0); | |
1234 | } | |
1235 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1236 | if (value && *value) { | |
1237 | vol->wsize = | |
1238 | simple_strtoul(value, &value, 0); | |
1239 | } | |
1240 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1241 | if (!value || !*value) { |
b6b38f70 | 1242 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1243 | continue; |
1244 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1245 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1246 | } |
1247 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1248 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1249 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1250 | } else { |
1397f2ee JL |
1251 | memset(vol->source_rfc1001_name, 0x20, |
1252 | RFC1001_NAME_LEN); | |
1253 | /* | |
1254 | * FIXME: are there cases in which a comma can | |
1255 | * be valid in workstation netbios name (and | |
1256 | * need special handling)? | |
1257 | */ | |
1258 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1259 | /* don't ucase netbiosname for user */ | |
50c2f753 | 1260 | if (value[i] == 0) |
1da177e4 | 1261 | break; |
1397f2ee | 1262 | vol->source_rfc1001_name[i] = value[i]; |
1da177e4 LT |
1263 | } |
1264 | /* The string has 16th byte zero still from | |
1265 | set at top of the function */ | |
1397f2ee | 1266 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1267 | printk(KERN_WARNING "CIFS: netbiosname" |
1268 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1269 | } |
1270 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1271 | /* servernetbiosname specified override *SMBSERVER */ | |
1272 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1273 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1274 | } else { |
1275 | /* last byte, type, is 0x20 for servr type */ | |
1397f2ee JL |
1276 | memset(vol->target_rfc1001_name, 0x20, |
1277 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 1278 | |
50c2f753 | 1279 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1280 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1281 | valid in this workstation netbios name |
1282 | (and need special handling)? */ | |
a10faeb2 | 1283 | |
50c2f753 SF |
1284 | /* user or mount helper must uppercase |
1285 | the netbiosname */ | |
1286 | if (value[i] == 0) | |
a10faeb2 SF |
1287 | break; |
1288 | else | |
50c2f753 SF |
1289 | vol->target_rfc1001_name[i] = |
1290 | value[i]; | |
a10faeb2 SF |
1291 | } |
1292 | /* The string has 16th byte zero still from | |
1293 | set at top of the function */ | |
1397f2ee | 1294 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
50c2f753 SF |
1295 | printk(KERN_WARNING "CIFS: server net" |
1296 | "biosname longer than 15 truncated.\n"); | |
1da177e4 | 1297 | } |
6d20e840 SJ |
1298 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
1299 | if (value && *value) { | |
1300 | vol->actimeo = HZ * simple_strtoul(value, | |
1301 | &value, 0); | |
1302 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1303 | cERROR(1, "CIFS: attribute cache" | |
1304 | "timeout too large"); | |
b946845a | 1305 | goto cifs_parse_mount_err; |
6d20e840 SJ |
1306 | } |
1307 | } | |
1da177e4 LT |
1308 | } else if (strnicmp(data, "credentials", 4) == 0) { |
1309 | /* ignore */ | |
1310 | } else if (strnicmp(data, "version", 3) == 0) { | |
1311 | /* ignore */ | |
50c2f753 | 1312 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1313 | /* ignore */ |
71a394fa SF |
1314 | } else if (strnicmp(data, "rw", 2) == 0) { |
1315 | /* ignore */ | |
1316 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1317 | /* ignore */ | |
edf1ae40 SF |
1318 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1319 | vol->noblocksnd = 1; | |
1320 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1321 | vol->noautotune = 1; | |
1da177e4 LT |
1322 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1323 | (strnicmp(data, "nosuid", 6) == 0) || | |
1324 | (strnicmp(data, "exec", 4) == 0) || | |
1325 | (strnicmp(data, "noexec", 6) == 0) || | |
1326 | (strnicmp(data, "nodev", 5) == 0) || | |
1327 | (strnicmp(data, "noauto", 6) == 0) || | |
1328 | (strnicmp(data, "dev", 3) == 0)) { | |
1329 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1330 | uses these opts to set flags, and the flags are read |
1331 | by the kernel vfs layer before we get here (ie | |
1332 | before read super) so there is no point trying to | |
1333 | parse these options again and set anything and it | |
1334 | is ok to just ignore them */ | |
1da177e4 | 1335 | continue; |
1da177e4 LT |
1336 | } else if (strnicmp(data, "hard", 4) == 0) { |
1337 | vol->retry = 1; | |
1338 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1339 | vol->retry = 0; | |
1340 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1341 | vol->noperm = 0; | |
1342 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1343 | vol->noperm = 1; | |
6a0b4824 SF |
1344 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1345 | vol->remap = 1; | |
1346 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1347 | vol->remap = 0; | |
50c2f753 SF |
1348 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1349 | vol->sfu_emul = 1; | |
1350 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1351 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1352 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1353 | vol->nodfs = 1; | |
ac67055e JA |
1354 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1355 | vol->posix_paths = 1; | |
1356 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1357 | vol->posix_paths = 0; | |
c18c842b SF |
1358 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1359 | vol->no_linux_ext = 1; | |
1360 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1361 | vol->no_linux_ext = 1; | |
50c2f753 | 1362 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1363 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1364 | vol->nocase = 1; |
f636a348 JL |
1365 | } else if (strnicmp(data, "mand", 4) == 0) { |
1366 | /* ignore */ | |
1367 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1368 | /* ignore */ | |
1369 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1370 | /* ignore */ | |
c46fa8ac SF |
1371 | } else if (strnicmp(data, "brl", 3) == 0) { |
1372 | vol->nobrl = 0; | |
50c2f753 | 1373 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1374 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1375 | vol->nobrl = 1; |
d3485d37 SF |
1376 | /* turn off mandatory locking in mode |
1377 | if remote locking is turned off since the | |
1378 | local vfs will do advisory */ | |
50c2f753 SF |
1379 | if (vol->file_mode == |
1380 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1381 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1382 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1383 | /* will take the shorter form "forcemand" as well */ | |
1384 | /* This mount option will force use of mandatory | |
1385 | (DOS/Windows style) byte range locks, instead of | |
1386 | using posix advisory byte range locks, even if the | |
1387 | Unix extensions are available and posix locks would | |
1388 | be supported otherwise. If Unix extensions are not | |
1389 | negotiated this has no effect since mandatory locks | |
1390 | would be used (mandatory locks is all that those | |
1391 | those servers support) */ | |
1392 | vol->mand_lock = 1; | |
1da177e4 LT |
1393 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1394 | vol->setuids = 1; | |
1395 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1396 | vol->setuids = 0; | |
d0a9c078 JL |
1397 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1398 | vol->dynperm = true; | |
1399 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1400 | vol->dynperm = false; | |
1da177e4 LT |
1401 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1402 | vol->retry = 0; | |
1403 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1404 | vol->retry = 1; | |
1405 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1406 | vol->intr = 0; | |
1407 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1408 | vol->intr = 1; | |
be652445 SF |
1409 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1410 | vol->nostrictsync = 1; | |
1411 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1412 | vol->nostrictsync = 0; | |
50c2f753 | 1413 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1414 | vol->server_ino = 1; |
50c2f753 | 1415 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1416 | vol->server_ino = 0; |
50c2f753 | 1417 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1418 | vol->cifs_acl = 1; |
1419 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1420 | vol->cifs_acl = 0; | |
50c2f753 | 1421 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1422 | vol->no_psx_acl = 0; |
50c2f753 | 1423 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1424 | vol->no_psx_acl = 1; |
84210e91 SF |
1425 | } else if (strnicmp(data, "locallease", 6) == 0) { |
1426 | vol->local_lease = 1; | |
50c2f753 | 1427 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1428 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1429 | } else if (strnicmp(data, "seal", 4) == 0) { |
1430 | /* we do not do the following in secFlags because seal | |
1431 | is a per tree connection (mount) not a per socket | |
1432 | or per-smb connection option in the protocol */ | |
1433 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1434 | vol->seal = 1; | |
50c2f753 | 1435 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1436 | vol->direct_io = 1; |
50c2f753 | 1437 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1438 | vol->direct_io = 1; |
d39454ff PS |
1439 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
1440 | vol->strict_io = 1; | |
1da177e4 | 1441 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1442 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1443 | "supported. Instead set " | |
1444 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d | 1445 | } else if (strnicmp(data, "fsc", 3) == 0) { |
607a569d SJ |
1446 | #ifndef CONFIG_CIFS_FSCACHE |
1447 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" | |
1448 | "kernel config option set"); | |
b946845a | 1449 | goto cifs_parse_mount_err; |
607a569d | 1450 | #endif |
fa1df75d | 1451 | vol->fsc = true; |
736a3320 SM |
1452 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
1453 | vol->mfsymlinks = true; | |
0eb8a132 JL |
1454 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
1455 | vol->multiuser = true; | |
1da177e4 | 1456 | } else |
50c2f753 SF |
1457 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1458 | data); | |
1da177e4 LT |
1459 | } |
1460 | if (vol->UNC == NULL) { | |
4523cc30 | 1461 | if (devname == NULL) { |
50c2f753 SF |
1462 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1463 | "target\n"); | |
b946845a | 1464 | goto cifs_parse_mount_err; |
1da177e4 LT |
1465 | } |
1466 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1467 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1468 | if (vol->UNC == NULL) |
b946845a | 1469 | goto cifs_parse_mount_err; |
50c2f753 | 1470 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1471 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1472 | vol->UNC[0] = '\\'; | |
1473 | vol->UNC[1] = '\\'; | |
1474 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1475 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1476 | "begin with // or \\\\ \n"); | |
b946845a | 1477 | goto cifs_parse_mount_err; |
1da177e4 | 1478 | } |
7c5e628f IM |
1479 | value = strpbrk(vol->UNC+2, "/\\"); |
1480 | if (value) | |
1481 | *value = '\\'; | |
1da177e4 LT |
1482 | } else { |
1483 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
b946845a | 1484 | goto cifs_parse_mount_err; |
1da177e4 LT |
1485 | } |
1486 | } | |
0eb8a132 JL |
1487 | |
1488 | if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) { | |
1489 | cERROR(1, "Multiuser mounts currently require krb5 " | |
1490 | "authentication!"); | |
b946845a | 1491 | goto cifs_parse_mount_err; |
0eb8a132 JL |
1492 | } |
1493 | ||
fb8c4b14 | 1494 | if (vol->UNCip == NULL) |
1da177e4 LT |
1495 | vol->UNCip = &vol->UNC[2]; |
1496 | ||
9b9d6b24 JL |
1497 | if (uid_specified) |
1498 | vol->override_uid = override_uid; | |
1499 | else if (override_uid == 1) | |
1500 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1501 | "specified with no uid= option.\n"); | |
1502 | ||
1503 | if (gid_specified) | |
1504 | vol->override_gid = override_gid; | |
1505 | else if (override_gid == 1) | |
1506 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1507 | "specified with no gid= option.\n"); | |
1508 | ||
b946845a | 1509 | kfree(mountdata_copy); |
1da177e4 | 1510 | return 0; |
b946845a SF |
1511 | |
1512 | cifs_parse_mount_err: | |
1513 | kfree(mountdata_copy); | |
1514 | return 1; | |
1da177e4 LT |
1515 | } |
1516 | ||
3eb9a889 BG |
1517 | /** Returns true if srcaddr isn't specified and rhs isn't |
1518 | * specified, or if srcaddr is specified and | |
1519 | * matches the IP address of the rhs argument. | |
1520 | */ | |
1521 | static bool | |
1522 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1523 | { | |
1524 | switch (srcaddr->sa_family) { | |
1525 | case AF_UNSPEC: | |
1526 | return (rhs->sa_family == AF_UNSPEC); | |
1527 | case AF_INET: { | |
1528 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1529 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1530 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1531 | } | |
1532 | case AF_INET6: { | |
1533 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1534 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1535 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1536 | } | |
1537 | default: | |
1538 | WARN_ON(1); | |
1539 | return false; /* don't expect to be here */ | |
1540 | } | |
1541 | } | |
1542 | ||
4b886136 PS |
1543 | /* |
1544 | * If no port is specified in addr structure, we try to match with 445 port | |
1545 | * and if it fails - with 139 ports. It should be called only if address | |
1546 | * families of server and addr are equal. | |
1547 | */ | |
1548 | static bool | |
1549 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1550 | { | |
6da97910 | 1551 | __be16 port, *sport; |
4b886136 PS |
1552 | |
1553 | switch (addr->sa_family) { | |
1554 | case AF_INET: | |
1555 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1556 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1557 | break; | |
1558 | case AF_INET6: | |
1559 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1560 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1561 | break; | |
1562 | default: | |
1563 | WARN_ON(1); | |
1564 | return false; | |
1565 | } | |
1566 | ||
1567 | if (!port) { | |
1568 | port = htons(CIFS_PORT); | |
1569 | if (port == *sport) | |
1570 | return true; | |
1571 | ||
1572 | port = htons(RFC1001_PORT); | |
1573 | } | |
1574 | ||
1575 | return port == *sport; | |
1576 | } | |
3eb9a889 | 1577 | |
4515148e | 1578 | static bool |
3eb9a889 BG |
1579 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1580 | struct sockaddr *srcaddr) | |
4515148e | 1581 | { |
4515148e | 1582 | switch (addr->sa_family) { |
a9f1b85e PS |
1583 | case AF_INET: { |
1584 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1585 | struct sockaddr_in *srv_addr4 = | |
1586 | (struct sockaddr_in *)&server->dstaddr; | |
1587 | ||
1588 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1589 | return false; |
4515148e | 1590 | break; |
a9f1b85e PS |
1591 | } |
1592 | case AF_INET6: { | |
1593 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1594 | struct sockaddr_in6 *srv_addr6 = | |
1595 | (struct sockaddr_in6 *)&server->dstaddr; | |
1596 | ||
4515148e | 1597 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1598 | &srv_addr6->sin6_addr)) |
4515148e | 1599 | return false; |
a9f1b85e | 1600 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1601 | return false; |
4515148e JL |
1602 | break; |
1603 | } | |
a9f1b85e PS |
1604 | default: |
1605 | WARN_ON(1); | |
1606 | return false; /* don't expect to be here */ | |
1607 | } | |
4515148e | 1608 | |
3eb9a889 BG |
1609 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1610 | return false; | |
1611 | ||
4515148e JL |
1612 | return true; |
1613 | } | |
1614 | ||
daf5b0b6 JL |
1615 | static bool |
1616 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1617 | { | |
1618 | unsigned int secFlags; | |
1619 | ||
1620 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1621 | secFlags = vol->secFlg; | |
1622 | else | |
1623 | secFlags = global_secflags | vol->secFlg; | |
1624 | ||
1625 | switch (server->secType) { | |
1626 | case LANMAN: | |
1627 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1628 | return false; | |
1629 | break; | |
1630 | case NTLMv2: | |
1631 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1632 | return false; | |
1633 | break; | |
1634 | case NTLM: | |
1635 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1636 | return false; | |
1637 | break; | |
1638 | case Kerberos: | |
1639 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1640 | return false; | |
1641 | break; | |
1642 | case RawNTLMSSP: | |
1643 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1644 | return false; | |
1645 | break; | |
1646 | default: | |
1647 | /* shouldn't happen */ | |
1648 | return false; | |
1649 | } | |
1650 | ||
25985edc | 1651 | /* now check if signing mode is acceptable */ |
daf5b0b6 JL |
1652 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
1653 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1654 | return false; | |
1655 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1656 | (server->secMode & | |
1657 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1658 | return false; | |
1659 | ||
1660 | return true; | |
1661 | } | |
1662 | ||
37bb04e5 PS |
1663 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1664 | struct smb_vol *vol) | |
1665 | { | |
1666 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) | |
1667 | return 0; | |
1668 | ||
1669 | if (!match_address(server, addr, | |
1670 | (struct sockaddr *)&vol->srcaddr)) | |
1671 | return 0; | |
1672 | ||
1673 | if (!match_port(server, addr)) | |
1674 | return 0; | |
1675 | ||
1676 | if (!match_security(server, vol)) | |
1677 | return 0; | |
1678 | ||
1679 | return 1; | |
1680 | } | |
1681 | ||
e7ddee90 | 1682 | static struct TCP_Server_Info * |
daf5b0b6 | 1683 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1684 | { |
e7ddee90 | 1685 | struct TCP_Server_Info *server; |
e7ddee90 | 1686 | |
3f9bcca7 | 1687 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 1688 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 1689 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
1690 | continue; |
1691 | ||
e7ddee90 | 1692 | ++server->srv_count; |
3f9bcca7 | 1693 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 1694 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1695 | return server; |
1da177e4 | 1696 | } |
3f9bcca7 | 1697 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1698 | return NULL; |
1699 | } | |
1b20d672 | 1700 | |
14fbf50d | 1701 | static void |
e7ddee90 | 1702 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1703 | { |
e7ddee90 | 1704 | struct task_struct *task; |
1b20d672 | 1705 | |
3f9bcca7 | 1706 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 1707 | if (--server->srv_count > 0) { |
3f9bcca7 | 1708 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 1709 | return; |
1da177e4 | 1710 | } |
1b20d672 | 1711 | |
f1d0c998 RL |
1712 | put_net(cifs_net_ns(server)); |
1713 | ||
e7ddee90 | 1714 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 1715 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1716 | |
c74093b6 JL |
1717 | cancel_delayed_work_sync(&server->echo); |
1718 | ||
e7ddee90 JL |
1719 | spin_lock(&GlobalMid_Lock); |
1720 | server->tcpStatus = CifsExiting; | |
1721 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1722 | |
d2b91521 | 1723 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
1724 | cifs_fscache_release_client_cookie(server); |
1725 | ||
21e73393 SP |
1726 | kfree(server->session_key.response); |
1727 | server->session_key.response = NULL; | |
1728 | server->session_key.len = 0; | |
1729 | ||
e7ddee90 JL |
1730 | task = xchg(&server->tsk, NULL); |
1731 | if (task) | |
1732 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1733 | } |
1734 | ||
63c038c2 JL |
1735 | static struct TCP_Server_Info * |
1736 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1737 | { | |
1738 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1739 | struct sockaddr_storage addr; |
63c038c2 JL |
1740 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1741 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1742 | int rc; | |
1743 | ||
a9ac49d3 | 1744 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1745 | |
b6b38f70 | 1746 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1747 | |
1e68b2b2 | 1748 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1749 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1750 | volume_info->UNCip, | |
67b7626a | 1751 | strlen(volume_info->UNCip), |
50d97160 | 1752 | volume_info->port); |
1e68b2b2 | 1753 | if (!rc) { |
63c038c2 JL |
1754 | /* we failed translating address */ |
1755 | rc = -EINVAL; | |
1756 | goto out_err; | |
1757 | } | |
63c038c2 JL |
1758 | } else if (volume_info->UNCip) { |
1759 | /* BB using ip addr as tcp_ses name to connect to the | |
1760 | DFS root below */ | |
b6b38f70 | 1761 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1762 | rc = -EINVAL; |
1763 | goto out_err; | |
1764 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1765 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1766 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1767 | rc = -EINVAL; |
1768 | goto out_err; | |
1769 | } | |
1770 | ||
1771 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1772 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1773 | if (tcp_ses) |
1774 | return tcp_ses; | |
1775 | ||
1776 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1777 | if (!tcp_ses) { | |
1778 | rc = -ENOMEM; | |
1779 | goto out_err; | |
1780 | } | |
1781 | ||
d2b91521 SP |
1782 | rc = cifs_crypto_shash_allocate(tcp_ses); |
1783 | if (rc) { | |
1784 | cERROR(1, "could not setup hash structures rc %d", rc); | |
1785 | goto out_err; | |
1786 | } | |
1787 | ||
f1d0c998 | 1788 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
1789 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
1790 | if (IS_ERR(tcp_ses->hostname)) { | |
1791 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 1792 | goto out_err_crypto_release; |
63c038c2 JL |
1793 | } |
1794 | ||
1795 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1796 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1797 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1798 | atomic_set(&tcp_ses->inFlight, 0); |
1799 | init_waitqueue_head(&tcp_ses->response_q); | |
1800 | init_waitqueue_head(&tcp_ses->request_q); | |
1801 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1802 | mutex_init(&tcp_ses->srv_mutex); | |
1803 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1804 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1805 | memcpy(tcp_ses->server_RFC1001_name, | |
1806 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 1807 | tcp_ses->session_estab = false; |
63c038c2 | 1808 | tcp_ses->sequence_number = 0; |
fda35943 | 1809 | tcp_ses->lstrp = jiffies; |
63c038c2 JL |
1810 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
1811 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 1812 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
1813 | |
1814 | /* | |
1815 | * at this point we are the only ones with the pointer | |
1816 | * to the struct since the kernel thread not created yet | |
1817 | * no need to spinlock this init of tcpStatus or srv_count | |
1818 | */ | |
1819 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
1820 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
1821 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
1822 | ++tcp_ses->srv_count; |
1823 | ||
a9ac49d3 | 1824 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1825 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1826 | /* BB should we allow ipv6 on port 139? */ |
1827 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
1828 | memcpy(&tcp_ses->dstaddr, sin_server6, |
1829 | sizeof(struct sockaddr_in6)); | |
1830 | } else | |
1831 | memcpy(&tcp_ses->dstaddr, sin_server, | |
1832 | sizeof(struct sockaddr_in)); | |
1833 | ||
1834 | rc = ip_connect(tcp_ses); | |
63c038c2 | 1835 | if (rc < 0) { |
b6b38f70 | 1836 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 1837 | goto out_err_crypto_release; |
63c038c2 JL |
1838 | } |
1839 | ||
1840 | /* | |
1841 | * since we're in a cifs function already, we know that | |
1842 | * this will succeed. No need for try_module_get(). | |
1843 | */ | |
1844 | __module_get(THIS_MODULE); | |
1845 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1846 | tcp_ses, "cifsd"); | |
1847 | if (IS_ERR(tcp_ses->tsk)) { | |
1848 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1849 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 1850 | module_put(THIS_MODULE); |
f7c5445a | 1851 | goto out_err_crypto_release; |
63c038c2 | 1852 | } |
fd88ce93 | 1853 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
1854 | |
1855 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 1856 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 1857 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 1858 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 1859 | |
488f1d2d SJ |
1860 | cifs_fscache_get_client_cookie(tcp_ses); |
1861 | ||
c74093b6 JL |
1862 | /* queue echo request delayed work */ |
1863 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); | |
1864 | ||
63c038c2 JL |
1865 | return tcp_ses; |
1866 | ||
f7c5445a | 1867 | out_err_crypto_release: |
d2b91521 SP |
1868 | cifs_crypto_shash_release(tcp_ses); |
1869 | ||
f1d0c998 RL |
1870 | put_net(cifs_net_ns(tcp_ses)); |
1871 | ||
63c038c2 JL |
1872 | out_err: |
1873 | if (tcp_ses) { | |
8347a5cd SF |
1874 | if (!IS_ERR(tcp_ses->hostname)) |
1875 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1876 | if (tcp_ses->ssocket) |
1877 | sock_release(tcp_ses->ssocket); | |
1878 | kfree(tcp_ses); | |
1879 | } | |
1880 | return ERR_PTR(rc); | |
1881 | } | |
1882 | ||
37bb04e5 PS |
1883 | static int match_session(struct cifsSesInfo *ses, struct smb_vol *vol) |
1884 | { | |
1885 | switch (ses->server->secType) { | |
1886 | case Kerberos: | |
1887 | if (vol->cred_uid != ses->cred_uid) | |
1888 | return 0; | |
1889 | break; | |
1890 | default: | |
1891 | /* anything else takes username/password */ | |
1892 | if (ses->user_name == NULL) | |
1893 | return 0; | |
1894 | if (strncmp(ses->user_name, vol->username, | |
1895 | MAX_USERNAME_SIZE)) | |
1896 | return 0; | |
1897 | if (strlen(vol->username) != 0 && | |
1898 | ses->password != NULL && | |
1899 | strncmp(ses->password, | |
1900 | vol->password ? vol->password : "", | |
1901 | MAX_PASSWORD_SIZE)) | |
1902 | return 0; | |
1903 | } | |
1904 | return 1; | |
1905 | } | |
1906 | ||
14fbf50d | 1907 | static struct cifsSesInfo * |
4ff67b72 | 1908 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1909 | { |
14fbf50d | 1910 | struct cifsSesInfo *ses; |
dea570e0 | 1911 | |
3f9bcca7 | 1912 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 1913 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
1914 | if (!match_session(ses, vol)) |
1915 | continue; | |
14fbf50d | 1916 | ++ses->ses_count; |
3f9bcca7 | 1917 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1918 | return ses; |
1919 | } | |
3f9bcca7 | 1920 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1921 | return NULL; |
1922 | } | |
dea570e0 | 1923 | |
14fbf50d JL |
1924 | static void |
1925 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1926 | { | |
1927 | int xid; | |
1928 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1929 | |
36988c76 | 1930 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 1931 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 1932 | if (--ses->ses_count > 0) { |
3f9bcca7 | 1933 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
1934 | return; |
1935 | } | |
dea570e0 | 1936 | |
14fbf50d | 1937 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 1938 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 1939 | |
14fbf50d JL |
1940 | if (ses->status == CifsGood) { |
1941 | xid = GetXid(); | |
1942 | CIFSSMBLogoff(xid, ses); | |
1943 | _FreeXid(xid); | |
1944 | } | |
1945 | sesInfoFree(ses); | |
1946 | cifs_put_tcp_session(server); | |
1947 | } | |
dea570e0 | 1948 | |
d9b94201 SF |
1949 | static bool warned_on_ntlm; /* globals init to false automatically */ |
1950 | ||
36988c76 JL |
1951 | static struct cifsSesInfo * |
1952 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1953 | { | |
1954 | int rc = -ENOMEM, xid; | |
1955 | struct cifsSesInfo *ses; | |
a9f1b85e PS |
1956 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
1957 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
1958 | |
1959 | xid = GetXid(); | |
1960 | ||
4ff67b72 | 1961 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1962 | if (ses) { |
1963 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1964 | ||
36988c76 | 1965 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1966 | rc = cifs_negotiate_protocol(xid, ses); |
1967 | if (rc) { | |
1968 | mutex_unlock(&ses->session_mutex); | |
1969 | /* problem -- put our ses reference */ | |
1970 | cifs_put_smb_ses(ses); | |
1971 | FreeXid(xid); | |
1972 | return ERR_PTR(rc); | |
1973 | } | |
36988c76 JL |
1974 | if (ses->need_reconnect) { |
1975 | cFYI(1, "Session needs reconnect"); | |
1976 | rc = cifs_setup_session(xid, ses, | |
1977 | volume_info->local_nls); | |
1978 | if (rc) { | |
1979 | mutex_unlock(&ses->session_mutex); | |
1980 | /* problem -- put our reference */ | |
1981 | cifs_put_smb_ses(ses); | |
1982 | FreeXid(xid); | |
1983 | return ERR_PTR(rc); | |
1984 | } | |
1985 | } | |
1986 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1987 | |
1988 | /* existing SMB ses has a server reference already */ | |
1989 | cifs_put_tcp_session(server); | |
36988c76 JL |
1990 | FreeXid(xid); |
1991 | return ses; | |
1992 | } | |
1993 | ||
1994 | cFYI(1, "Existing smb sess not found"); | |
1995 | ses = sesInfoAlloc(); | |
1996 | if (ses == NULL) | |
1997 | goto get_ses_fail; | |
1998 | ||
1999 | /* new SMB session uses our server ref */ | |
2000 | ses->server = server; | |
a9f1b85e PS |
2001 | if (server->dstaddr.ss_family == AF_INET6) |
2002 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2003 | else |
a9f1b85e | 2004 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2005 | |
8727c8a8 SF |
2006 | if (volume_info->username) { |
2007 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2008 | if (!ses->user_name) | |
2009 | goto get_ses_fail; | |
2010 | } | |
36988c76 JL |
2011 | |
2012 | /* volume_info->password freed at unmount */ | |
2013 | if (volume_info->password) { | |
2014 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2015 | if (!ses->password) | |
2016 | goto get_ses_fail; | |
2017 | } | |
2018 | if (volume_info->domainname) { | |
d3686d54 SP |
2019 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2020 | if (!ses->domainName) | |
2021 | goto get_ses_fail; | |
36988c76 | 2022 | } |
3e4b3e1f | 2023 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2024 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2025 | |
2026 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2027 | supported for many years, time to update default security mechanism */ | |
2028 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2029 | warned_on_ntlm = true; | |
2030 | cERROR(1, "default security mechanism requested. The default " | |
2031 | "security mechanism will be upgraded from ntlm to " | |
2032 | "ntlmv2 in kernel release 2.6.41"); | |
2033 | } | |
36988c76 JL |
2034 | ses->overrideSecFlg = volume_info->secFlg; |
2035 | ||
2036 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2037 | rc = cifs_negotiate_protocol(xid, ses); |
2038 | if (!rc) | |
2039 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2040 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2041 | if (rc) |
36988c76 JL |
2042 | goto get_ses_fail; |
2043 | ||
2044 | /* success, put it on the list */ | |
3f9bcca7 | 2045 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2046 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2047 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2048 | |
2049 | FreeXid(xid); | |
2050 | return ses; | |
2051 | ||
2052 | get_ses_fail: | |
2053 | sesInfoFree(ses); | |
2054 | FreeXid(xid); | |
2055 | return ERR_PTR(rc); | |
2056 | } | |
2057 | ||
37bb04e5 PS |
2058 | static int match_tcon(struct cifsTconInfo *tcon, const char *unc) |
2059 | { | |
2060 | if (tcon->tidStatus == CifsExiting) | |
2061 | return 0; | |
2062 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2063 | return 0; | |
2064 | return 1; | |
2065 | } | |
2066 | ||
f1987b44 JL |
2067 | static struct cifsTconInfo * |
2068 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
2069 | { | |
2070 | struct list_head *tmp; | |
2071 | struct cifsTconInfo *tcon; | |
2072 | ||
3f9bcca7 | 2073 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2074 | list_for_each(tmp, &ses->tcon_list) { |
2075 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
37bb04e5 | 2076 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2077 | continue; |
f1987b44 | 2078 | ++tcon->tc_count; |
3f9bcca7 | 2079 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2080 | return tcon; |
1da177e4 | 2081 | } |
3f9bcca7 | 2082 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2083 | return NULL; |
2084 | } | |
2085 | ||
f1987b44 JL |
2086 | static void |
2087 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
2088 | { | |
2089 | int xid; | |
2090 | struct cifsSesInfo *ses = tcon->ses; | |
2091 | ||
d00c28de | 2092 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2093 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2094 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2095 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2096 | return; |
2097 | } | |
2098 | ||
2099 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2100 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2101 | |
2102 | xid = GetXid(); | |
2103 | CIFSSMBTDis(xid, tcon); | |
2104 | _FreeXid(xid); | |
2105 | ||
d03382ce | 2106 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2107 | tconInfoFree(tcon); |
f1987b44 JL |
2108 | cifs_put_smb_ses(ses); |
2109 | } | |
2110 | ||
d00c28de JL |
2111 | static struct cifsTconInfo * |
2112 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
2113 | { | |
2114 | int rc, xid; | |
2115 | struct cifsTconInfo *tcon; | |
2116 | ||
2117 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2118 | if (tcon) { | |
2119 | cFYI(1, "Found match on UNC path"); | |
2120 | /* existing tcon already has a reference */ | |
2121 | cifs_put_smb_ses(ses); | |
2122 | if (tcon->seal != volume_info->seal) | |
2123 | cERROR(1, "transport encryption setting " | |
2124 | "conflicts with existing tid"); | |
2125 | return tcon; | |
2126 | } | |
2127 | ||
2128 | tcon = tconInfoAlloc(); | |
2129 | if (tcon == NULL) { | |
2130 | rc = -ENOMEM; | |
2131 | goto out_fail; | |
2132 | } | |
2133 | ||
2134 | tcon->ses = ses; | |
2135 | if (volume_info->password) { | |
2136 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2137 | if (!tcon->password) { | |
2138 | rc = -ENOMEM; | |
2139 | goto out_fail; | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2144 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2145 | cERROR(1, "Missing share name"); | |
2146 | rc = -ENODEV; | |
2147 | goto out_fail; | |
2148 | } | |
2149 | ||
2150 | /* BB Do we need to wrap session_mutex around | |
2151 | * this TCon call and Unix SetFS as | |
2152 | * we do on SessSetup and reconnect? */ | |
2153 | xid = GetXid(); | |
2154 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2155 | FreeXid(xid); | |
2156 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2157 | if (rc) | |
2158 | goto out_fail; | |
2159 | ||
2160 | if (volume_info->nodfs) { | |
2161 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2162 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2163 | } | |
2164 | tcon->seal = volume_info->seal; | |
2165 | /* we can have only one retry value for a connection | |
2166 | to a share so for resources mounted more than once | |
2167 | to the same server share the last value passed in | |
2168 | for the retry flag is used */ | |
2169 | tcon->retry = volume_info->retry; | |
2170 | tcon->nocase = volume_info->nocase; | |
2171 | tcon->local_lease = volume_info->local_lease; | |
2172 | ||
3f9bcca7 | 2173 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2174 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2175 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2176 | |
d03382ce SJ |
2177 | cifs_fscache_get_super_cookie(tcon); |
2178 | ||
d00c28de JL |
2179 | return tcon; |
2180 | ||
2181 | out_fail: | |
2182 | tconInfoFree(tcon); | |
2183 | return ERR_PTR(rc); | |
2184 | } | |
2185 | ||
9d002df4 JL |
2186 | void |
2187 | cifs_put_tlink(struct tcon_link *tlink) | |
2188 | { | |
2189 | if (!tlink || IS_ERR(tlink)) | |
2190 | return; | |
2191 | ||
2192 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2193 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2194 | tlink->tl_time = jiffies; | |
2195 | return; | |
2196 | } | |
2197 | ||
2198 | if (!IS_ERR(tlink_tcon(tlink))) | |
2199 | cifs_put_tcon(tlink_tcon(tlink)); | |
2200 | kfree(tlink); | |
2201 | return; | |
2202 | } | |
d00c28de | 2203 | |
1da177e4 | 2204 | int |
50c2f753 SF |
2205 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
2206 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 2207 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2208 | { |
2209 | char *temp_unc; | |
2210 | int rc = 0; | |
2211 | ||
2212 | *pnum_referrals = 0; | |
366781c1 | 2213 | *preferrals = NULL; |
1da177e4 LT |
2214 | |
2215 | if (pSesInfo->ipc_tid == 0) { | |
2216 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2217 | strnlen(pSesInfo->serverName, |
2218 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2219 | + 1 + 4 /* slash IPC$ */ + 2, |
2220 | GFP_KERNEL); | |
2221 | if (temp_unc == NULL) | |
2222 | return -ENOMEM; | |
2223 | temp_unc[0] = '\\'; | |
2224 | temp_unc[1] = '\\'; | |
2225 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2226 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2227 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2228 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2229 | kfree(temp_unc); |
2230 | } | |
2231 | if (rc == 0) | |
c2cf07d5 | 2232 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2233 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2234 | /* BB map targetUNCs to dfs_info3 structures, here or |
2235 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2236 | |
2237 | return rc; | |
2238 | } | |
2239 | ||
09e50d55 JL |
2240 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2241 | static struct lock_class_key cifs_key[2]; | |
2242 | static struct lock_class_key cifs_slock_key[2]; | |
2243 | ||
2244 | static inline void | |
2245 | cifs_reclassify_socket4(struct socket *sock) | |
2246 | { | |
2247 | struct sock *sk = sock->sk; | |
2248 | BUG_ON(sock_owned_by_user(sk)); | |
2249 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2250 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2251 | } | |
2252 | ||
2253 | static inline void | |
2254 | cifs_reclassify_socket6(struct socket *sock) | |
2255 | { | |
2256 | struct sock *sk = sock->sk; | |
2257 | BUG_ON(sock_owned_by_user(sk)); | |
2258 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2259 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2260 | } | |
2261 | #else | |
2262 | static inline void | |
2263 | cifs_reclassify_socket4(struct socket *sock) | |
2264 | { | |
2265 | } | |
2266 | ||
2267 | static inline void | |
2268 | cifs_reclassify_socket6(struct socket *sock) | |
2269 | { | |
2270 | } | |
2271 | #endif | |
2272 | ||
1da177e4 | 2273 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2274 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2275 | { |
50c2f753 | 2276 | unsigned int i, j; |
1da177e4 | 2277 | |
50c2f753 | 2278 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2279 | /* mask a nibble at a time and encode */ |
2280 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2281 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2282 | j += 2; |
1da177e4 LT |
2283 | } |
2284 | ||
2285 | } | |
2286 | ||
3eb9a889 BG |
2287 | static int |
2288 | bind_socket(struct TCP_Server_Info *server) | |
2289 | { | |
2290 | int rc = 0; | |
2291 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2292 | /* Bind to the specified local IP address */ | |
2293 | struct socket *socket = server->ssocket; | |
2294 | rc = socket->ops->bind(socket, | |
2295 | (struct sockaddr *) &server->srcaddr, | |
2296 | sizeof(server->srcaddr)); | |
2297 | if (rc < 0) { | |
2298 | struct sockaddr_in *saddr4; | |
2299 | struct sockaddr_in6 *saddr6; | |
2300 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2301 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2302 | if (saddr6->sin6_family == AF_INET6) | |
2303 | cERROR(1, "cifs: " | |
2304 | "Failed to bind to: %pI6c, error: %d\n", | |
2305 | &saddr6->sin6_addr, rc); | |
2306 | else | |
2307 | cERROR(1, "cifs: " | |
2308 | "Failed to bind to: %pI4, error: %d\n", | |
2309 | &saddr4->sin_addr.s_addr, rc); | |
2310 | } | |
2311 | } | |
2312 | return rc; | |
2313 | } | |
1da177e4 LT |
2314 | |
2315 | static int | |
a9f1b85e | 2316 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2317 | { |
2318 | int rc = 0; | |
a9f1b85e PS |
2319 | /* |
2320 | * some servers require RFC1001 sessinit before sending | |
2321 | * negprot - BB check reconnection in case where second | |
2322 | * sessinit is sent but no second negprot | |
2323 | */ | |
2324 | struct rfc1002_session_packet *ses_init_buf; | |
2325 | struct smb_hdr *smb_buf; | |
2326 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2327 | GFP_KERNEL); | |
2328 | if (ses_init_buf) { | |
2329 | ses_init_buf->trailer.session_req.called_len = 32; | |
2330 | ||
2331 | if (server->server_RFC1001_name && | |
2332 | server->server_RFC1001_name[0] != 0) | |
2333 | rfc1002mangle(ses_init_buf->trailer. | |
2334 | session_req.called_name, | |
2335 | server->server_RFC1001_name, | |
2336 | RFC1001_NAME_LEN_WITH_NULL); | |
2337 | else | |
2338 | rfc1002mangle(ses_init_buf->trailer. | |
2339 | session_req.called_name, | |
2340 | DEFAULT_CIFS_CALLED_NAME, | |
2341 | RFC1001_NAME_LEN_WITH_NULL); | |
2342 | ||
2343 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2344 | ||
2345 | /* | |
2346 | * calling name ends in null (byte 16) from old smb | |
2347 | * convention. | |
2348 | */ | |
2349 | if (server->workstation_RFC1001_name && | |
2350 | server->workstation_RFC1001_name[0] != 0) | |
2351 | rfc1002mangle(ses_init_buf->trailer. | |
2352 | session_req.calling_name, | |
2353 | server->workstation_RFC1001_name, | |
2354 | RFC1001_NAME_LEN_WITH_NULL); | |
2355 | else | |
2356 | rfc1002mangle(ses_init_buf->trailer. | |
2357 | session_req.calling_name, | |
2358 | "LINUX_CIFS_CLNT", | |
2359 | RFC1001_NAME_LEN_WITH_NULL); | |
2360 | ||
2361 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2362 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2363 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2364 | ||
2365 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2366 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2367 | rc = smb_send(server, smb_buf, 0x44); |
2368 | kfree(ses_init_buf); | |
2369 | /* | |
2370 | * RFC1001 layer in at least one server | |
2371 | * requires very short break before negprot | |
2372 | * presumably because not expecting negprot | |
2373 | * to follow so fast. This is a simple | |
2374 | * solution that works without | |
2375 | * complicating the code and causes no | |
2376 | * significant slowing down on mount | |
2377 | * for everyone else | |
2378 | */ | |
2379 | usleep_range(1000, 2000); | |
2380 | } | |
2381 | /* | |
2382 | * else the negprot may still work without this | |
2383 | * even though malloc failed | |
2384 | */ | |
2385 | ||
2386 | return rc; | |
2387 | } | |
2388 | ||
2389 | static int | |
2390 | generic_ip_connect(struct TCP_Server_Info *server) | |
2391 | { | |
2392 | int rc = 0; | |
6da97910 | 2393 | __be16 sport; |
a9f1b85e | 2394 | int slen, sfamily; |
bcf4b106 | 2395 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2396 | struct sockaddr *saddr; |
2397 | ||
2398 | saddr = (struct sockaddr *) &server->dstaddr; | |
2399 | ||
2400 | if (server->dstaddr.ss_family == AF_INET6) { | |
2401 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2402 | slen = sizeof(struct sockaddr_in6); | |
2403 | sfamily = AF_INET6; | |
2404 | } else { | |
2405 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2406 | slen = sizeof(struct sockaddr_in); | |
2407 | sfamily = AF_INET; | |
2408 | } | |
1da177e4 | 2409 | |
bcf4b106 | 2410 | if (socket == NULL) { |
f1d0c998 RL |
2411 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2412 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2413 | if (rc < 0) { |
b6b38f70 | 2414 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2415 | server->ssocket = NULL; |
1da177e4 | 2416 | return rc; |
1da177e4 | 2417 | } |
bcf4b106 JL |
2418 | |
2419 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2420 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2421 | server->ssocket = socket; |
2422 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2423 | if (sfamily == AF_INET6) |
2424 | cifs_reclassify_socket6(socket); | |
2425 | else | |
2426 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2427 | } |
2428 | ||
3eb9a889 BG |
2429 | rc = bind_socket(server); |
2430 | if (rc < 0) | |
2431 | return rc; | |
2432 | ||
a9f1b85e PS |
2433 | rc = socket->ops->connect(socket, saddr, slen, 0); |
2434 | if (rc < 0) { | |
2435 | cFYI(1, "Error %d connecting to server", rc); | |
bcf4b106 JL |
2436 | sock_release(socket); |
2437 | server->ssocket = NULL; | |
1da177e4 LT |
2438 | return rc; |
2439 | } | |
bcf4b106 | 2440 | |
bcf4b106 JL |
2441 | /* |
2442 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2443 | * the default. sock_setsockopt not used because it expects |
2444 | * user space buffer | |
bcf4b106 JL |
2445 | */ |
2446 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2447 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2448 | |
b387eaeb | 2449 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2450 | if (server->noautotune) { |
2451 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2452 | socket->sk->sk_sndbuf = 200 * 1024; | |
2453 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2454 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2455 | } |
1da177e4 | 2456 | |
6a5fa236 | 2457 | if (server->tcp_nodelay) { |
a9f1b85e | 2458 | int val = 1; |
6a5fa236 SF |
2459 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
2460 | (char *)&val, sizeof(val)); | |
2461 | if (rc) | |
b6b38f70 | 2462 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2463 | } |
2464 | ||
b6b38f70 | 2465 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2466 | socket->sk->sk_sndbuf, |
b6b38f70 | 2467 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2468 | |
a9f1b85e PS |
2469 | if (sport == htons(RFC1001_PORT)) |
2470 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 2471 | |
1da177e4 LT |
2472 | return rc; |
2473 | } | |
2474 | ||
2475 | static int | |
a9f1b85e | 2476 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 2477 | { |
6da97910 | 2478 | __be16 *sport; |
a9f1b85e PS |
2479 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
2480 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 2481 | |
a9f1b85e PS |
2482 | if (server->dstaddr.ss_family == AF_INET6) |
2483 | sport = &addr6->sin6_port; | |
2484 | else | |
2485 | sport = &addr->sin_port; | |
1da177e4 | 2486 | |
a9f1b85e PS |
2487 | if (*sport == 0) { |
2488 | int rc; | |
1da177e4 | 2489 | |
a9f1b85e PS |
2490 | /* try with 445 port at first */ |
2491 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 2492 | |
a9f1b85e | 2493 | rc = generic_ip_connect(server); |
1da177e4 | 2494 | if (rc >= 0) |
a9f1b85e | 2495 | return rc; |
6a5fa236 | 2496 | |
a9f1b85e PS |
2497 | /* if it failed, try with 139 port */ |
2498 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
2499 | } |
2500 | ||
a9f1b85e | 2501 | return generic_ip_connect(server); |
1da177e4 LT |
2502 | } |
2503 | ||
50c2f753 SF |
2504 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2505 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2506 | { |
2507 | /* if we are reconnecting then should we check to see if | |
2508 | * any requested capabilities changed locally e.g. via | |
2509 | * remount but we can not do much about it here | |
2510 | * if they have (even if we could detect it by the following) | |
2511 | * Perhaps we could add a backpointer to array of sb from tcon | |
2512 | * or if we change to make all sb to same share the same | |
2513 | * sb as NFS - then we only have one backpointer to sb. | |
2514 | * What if we wanted to mount the server share twice once with | |
2515 | * and once without posixacls or posix paths? */ | |
2516 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2517 | |
c18c842b SF |
2518 | if (vol_info && vol_info->no_linux_ext) { |
2519 | tcon->fsUnixInfo.Capability = 0; | |
2520 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2521 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2522 | return; |
2523 | } else if (vol_info) | |
2524 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2525 | ||
2526 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2527 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2528 | return; |
2529 | } | |
50c2f753 | 2530 | |
fb8c4b14 | 2531 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2532 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 2533 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
2534 | /* check for reconnect case in which we do not |
2535 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2536 | if (vol_info == NULL) { |
50c2f753 | 2537 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2538 | originally at mount time */ |
2539 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2540 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2541 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2542 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2543 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2544 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2545 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2546 | cERROR(1, "possible reconnect error"); |
2547 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2548 | } |
8af18971 | 2549 | } |
50c2f753 | 2550 | |
6848b733 SF |
2551 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
2552 | cERROR(1, "per-share encryption not supported yet"); | |
2553 | ||
8af18971 | 2554 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2555 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2556 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2557 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2558 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2559 | if (sb) |
8af18971 SF |
2560 | sb->s_flags |= MS_POSIXACL; |
2561 | } | |
2562 | ||
75865f8c | 2563 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2564 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2565 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2566 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2567 | if (sb) |
50c2f753 | 2568 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2569 | CIFS_MOUNT_POSIX_PATHS; |
2570 | } | |
50c2f753 | 2571 | |
984acfe1 SF |
2572 | /* We might be setting the path sep back to a different |
2573 | form if we are reconnecting and the server switched its | |
50c2f753 | 2574 | posix path capability for this share */ |
75865f8c | 2575 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2576 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2577 | |
2578 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2579 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2580 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2581 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2582 | } |
2583 | } | |
50c2f753 SF |
2584 | |
2585 | ||
b6b38f70 | 2586 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2587 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2588 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2589 | cFYI(1, "FCNTL cap"); |
75865f8c | 2590 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2591 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2592 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2593 | cFYI(1, "POSIX path cap"); |
75865f8c | 2594 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2595 | cFYI(1, "XATTR cap"); |
75865f8c | 2596 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2597 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2598 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2599 | cFYI(1, "very large read cap"); |
75865f8c | 2600 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2601 | cFYI(1, "very large write cap"); |
6848b733 SF |
2602 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
2603 | cFYI(1, "transport encryption cap"); | |
2604 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
2605 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
2606 | #endif /* CIFS_DEBUG2 */ |
2607 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2608 | if (vol_info == NULL) { |
b6b38f70 | 2609 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2610 | } else |
b6b38f70 | 2611 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2612 | "with the server failed. Consider " |
2613 | "mounting with the Unix Extensions\n" | |
2614 | "disabled, if problems are found, " | |
2615 | "by specifying the nounix mount " | |
b6b38f70 | 2616 | "option."); |
5a44b319 | 2617 | |
8af18971 SF |
2618 | } |
2619 | } | |
2620 | } | |
2621 | ||
03a143c9 SF |
2622 | static void |
2623 | convert_delimiter(char *path, char delim) | |
2624 | { | |
2625 | int i; | |
c2d68ea6 | 2626 | char old_delim; |
03a143c9 SF |
2627 | |
2628 | if (path == NULL) | |
2629 | return; | |
2630 | ||
582d21e5 | 2631 | if (delim == '/') |
c2d68ea6 SF |
2632 | old_delim = '\\'; |
2633 | else | |
2634 | old_delim = '/'; | |
2635 | ||
03a143c9 | 2636 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2637 | if (path[i] == old_delim) |
03a143c9 SF |
2638 | path[i] = delim; |
2639 | } | |
2640 | } | |
2641 | ||
724d9f1c PS |
2642 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
2643 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2644 | { |
2de970ff JL |
2645 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
2646 | ||
3b795210 | 2647 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2648 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2649 | pvolume_info->rsize); | |
3b795210 SF |
2650 | cifs_sb->rsize = CIFSMaxBufSize; |
2651 | } else if ((pvolume_info->rsize) && | |
2652 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2653 | cifs_sb->rsize = pvolume_info->rsize; | |
2654 | else /* default */ | |
2655 | cifs_sb->rsize = CIFSMaxBufSize; | |
2656 | ||
3b795210 SF |
2657 | if (cifs_sb->rsize < 2048) { |
2658 | cifs_sb->rsize = 2048; | |
2659 | /* Windows ME may prefer this */ | |
b6b38f70 | 2660 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2661 | } |
2662 | /* calculate prepath */ | |
2663 | cifs_sb->prepath = pvolume_info->prepath; | |
2664 | if (cifs_sb->prepath) { | |
2665 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2666 | /* we can not convert the / to \ in the path | |
2667 | separators in the prefixpath yet because we do not | |
2668 | know (until reset_cifs_unix_caps is called later) | |
2669 | whether POSIX PATH CAP is available. We normalize | |
2670 | the / to \ after reset_cifs_unix_caps is called */ | |
2671 | pvolume_info->prepath = NULL; | |
2672 | } else | |
2673 | cifs_sb->prepathlen = 0; | |
2674 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2675 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2676 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2677 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2678 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2679 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 2680 | |
6d20e840 | 2681 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 2682 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 2683 | |
3b795210 SF |
2684 | if (pvolume_info->noperm) |
2685 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2686 | if (pvolume_info->setuids) | |
2687 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2688 | if (pvolume_info->server_ino) | |
2689 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2690 | if (pvolume_info->remap) | |
2691 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2692 | if (pvolume_info->no_xattr) | |
2693 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2694 | if (pvolume_info->sfu_emul) | |
2695 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2696 | if (pvolume_info->nobrl) | |
2697 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2698 | if (pvolume_info->nostrictsync) |
4717bed6 | 2699 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2700 | if (pvolume_info->mand_lock) |
2701 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2702 | if (pvolume_info->cifs_acl) |
2703 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2704 | if (pvolume_info->override_uid) | |
2705 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2706 | if (pvolume_info->override_gid) | |
2707 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2708 | if (pvolume_info->dynperm) | |
2709 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2710 | if (pvolume_info->fsc) |
2711 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
2712 | if (pvolume_info->multiuser) |
2713 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
2714 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
2715 | if (pvolume_info->strict_io) |
2716 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 2717 | if (pvolume_info->direct_io) { |
b6b38f70 | 2718 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2719 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2720 | } | |
736a3320 SM |
2721 | if (pvolume_info->mfsymlinks) { |
2722 | if (pvolume_info->sfu_emul) { | |
2723 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
2724 | "mount option is used"); | |
2725 | } else { | |
2726 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
2727 | } | |
2728 | } | |
3b795210 SF |
2729 | |
2730 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2731 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2732 | "mount option supported"); | |
b1c8d2b4 JL |
2733 | } |
2734 | ||
f7910cbd JL |
2735 | /* |
2736 | * When the server supports very large writes via POSIX extensions, we can | |
2737 | * allow up to 2^24 - PAGE_CACHE_SIZE. | |
2738 | * | |
2739 | * Note that this might make for "interesting" allocation problems during | |
2740 | * writeback however (as we have to allocate an array of pointers for the | |
2741 | * pages). A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
2742 | */ | |
2743 | #define CIFS_MAX_WSIZE ((1<<24) - PAGE_CACHE_SIZE) | |
2744 | ||
2745 | /* | |
2746 | * When the server doesn't allow large posix writes, default to a wsize of | |
2747 | * 128k - PAGE_CACHE_SIZE -- one page less than the largest frame size | |
2748 | * described in RFC1001. This allows space for the header without going over | |
2749 | * that by default. | |
2750 | */ | |
2751 | #define CIFS_MAX_RFC1001_WSIZE (128 * 1024 - PAGE_CACHE_SIZE) | |
2752 | ||
2753 | /* | |
2754 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
2755 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
2756 | * a single wsize request with a single call. | |
2757 | */ | |
2758 | #define CIFS_DEFAULT_WSIZE (1024 * 1024) | |
2759 | ||
2760 | static unsigned int | |
2761 | cifs_negotiate_wsize(struct cifsTconInfo *tcon, struct smb_vol *pvolume_info) | |
2762 | { | |
2763 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
2764 | struct TCP_Server_Info *server = tcon->ses->server; | |
2765 | unsigned int wsize = pvolume_info->wsize ? pvolume_info->wsize : | |
2766 | CIFS_DEFAULT_WSIZE; | |
2767 | ||
2768 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
2769 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
2770 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1001_WSIZE); | |
2771 | ||
2772 | /* no CAP_LARGE_WRITE_X? Limit it to 16 bits */ | |
2773 | if (!(server->capabilities & CAP_LARGE_WRITE_X)) | |
2774 | wsize = min_t(unsigned int, wsize, USHRT_MAX); | |
2775 | ||
2776 | /* hard limit of CIFS_MAX_WSIZE */ | |
2777 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
2778 | ||
2779 | return wsize; | |
2780 | } | |
2781 | ||
e4cce94c IM |
2782 | static int |
2783 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2784 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2785 | { | |
2786 | int rc; | |
e4cce94c IM |
2787 | FILE_ALL_INFO *pfile_info; |
2788 | ||
e4cce94c IM |
2789 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2790 | if (pfile_info == NULL) | |
2791 | return -ENOMEM; | |
2792 | ||
2793 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2794 | 0 /* not legacy */, cifs_sb->local_nls, | |
2795 | cifs_sb->mnt_cifs_flags & | |
2796 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
2797 | |
2798 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
2799 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
2800 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
2801 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
2802 | kfree(pfile_info); |
2803 | return rc; | |
2804 | } | |
2805 | ||
724d9f1c PS |
2806 | void |
2807 | cifs_cleanup_volume_info(struct smb_vol **pvolume_info) | |
1bfe73c2 IM |
2808 | { |
2809 | struct smb_vol *volume_info; | |
2810 | ||
ad6cca6d | 2811 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2812 | return; |
2813 | ||
2814 | volume_info = *pvolume_info; | |
b946845a | 2815 | kfree(volume_info->username); |
1bfe73c2 IM |
2816 | kzfree(volume_info->password); |
2817 | kfree(volume_info->UNC); | |
b946845a SF |
2818 | kfree(volume_info->UNCip); |
2819 | kfree(volume_info->domainname); | |
2820 | kfree(volume_info->iocharset); | |
1bfe73c2 IM |
2821 | kfree(volume_info->prepath); |
2822 | kfree(volume_info); | |
2823 | *pvolume_info = NULL; | |
2824 | return; | |
2825 | } | |
2826 | ||
2d6d589d | 2827 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2828 | /* build_path_to_root returns full path to root when |
2829 | * we do not have an exiting connection (tcon) */ | |
2830 | static char * | |
2831 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2832 | const struct cifs_sb_info *cifs_sb) | |
2833 | { | |
2834 | char *full_path; | |
2835 | ||
2836 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2837 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2838 | if (full_path == NULL) | |
2839 | return ERR_PTR(-ENOMEM); | |
2840 | ||
2841 | strncpy(full_path, volume_info->UNC, unc_len); | |
2842 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2843 | int i; | |
2844 | for (i = 0; i < unc_len; i++) { | |
2845 | if (full_path[i] == '\\') | |
2846 | full_path[i] = '/'; | |
2847 | } | |
2848 | } | |
2849 | ||
2850 | if (cifs_sb->prepathlen) | |
2851 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2852 | cifs_sb->prepathlen); | |
2853 | ||
2854 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2855 | return full_path; | |
2856 | } | |
dd613945 SF |
2857 | |
2858 | /* | |
2859 | * Perform a dfs referral query for a share and (optionally) prefix | |
2860 | * | |
046462ab SF |
2861 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
2862 | * to a string containing updated options for the submount. Otherwise it | |
2863 | * will be left untouched. | |
dd613945 SF |
2864 | * |
2865 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
2866 | * determine whether there were referrals. | |
2867 | */ | |
2868 | static int | |
2869 | expand_dfs_referral(int xid, struct cifsSesInfo *pSesInfo, | |
2870 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, | |
046462ab | 2871 | int check_prefix) |
dd613945 SF |
2872 | { |
2873 | int rc; | |
2874 | unsigned int num_referrals = 0; | |
2875 | struct dfs_info3_param *referrals = NULL; | |
2876 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
2877 | ||
2878 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2879 | if (IS_ERR(full_path)) | |
2880 | return PTR_ERR(full_path); | |
2881 | ||
2882 | /* For DFS paths, skip the first '\' of the UNC */ | |
2883 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
2884 | ||
2885 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
2886 | &num_referrals, &referrals, | |
2887 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2888 | ||
2889 | if (!rc && num_referrals > 0) { | |
2890 | char *fake_devname = NULL; | |
2891 | ||
2892 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
2893 | full_path + 1, referrals, | |
2894 | &fake_devname); | |
2895 | ||
2896 | free_dfs_info_array(referrals, num_referrals); | |
2897 | kfree(fake_devname); | |
2898 | ||
046462ab SF |
2899 | if (cifs_sb->mountdata != NULL) |
2900 | kfree(cifs_sb->mountdata); | |
2901 | ||
dd613945 SF |
2902 | if (IS_ERR(mdata)) { |
2903 | rc = PTR_ERR(mdata); | |
2904 | mdata = NULL; | |
2905 | } | |
046462ab | 2906 | cifs_sb->mountdata = mdata; |
dd613945 SF |
2907 | } |
2908 | kfree(full_path); | |
2909 | return rc; | |
2910 | } | |
2d6d589d | 2911 | #endif |
1bfe73c2 | 2912 | |
724d9f1c PS |
2913 | int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data, |
2914 | const char *devname) | |
1da177e4 | 2915 | { |
7586b765 | 2916 | struct smb_vol *volume_info; |
724d9f1c | 2917 | int rc = 0; |
1da177e4 | 2918 | |
724d9f1c | 2919 | *pvolume_info = NULL; |
1da177e4 | 2920 | |
7586b765 JL |
2921 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2922 | if (!volume_info) { | |
2923 | rc = -ENOMEM; | |
2924 | goto out; | |
2925 | } | |
50c2f753 | 2926 | |
724d9f1c | 2927 | if (cifs_parse_mount_options(mount_data, devname, |
f14bcf71 | 2928 | volume_info)) { |
70fe7dc0 JL |
2929 | rc = -EINVAL; |
2930 | goto out; | |
1da177e4 LT |
2931 | } |
2932 | ||
7586b765 | 2933 | if (volume_info->nullauth) { |
b6b38f70 | 2934 | cFYI(1, "null user"); |
7586b765 JL |
2935 | volume_info->username = ""; |
2936 | } else if (volume_info->username) { | |
1da177e4 | 2937 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2938 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2939 | } else { |
bf820679 | 2940 | cifserror("No username specified"); |
50c2f753 SF |
2941 | /* In userspace mount helper we can get user name from alternate |
2942 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2943 | rc = -EINVAL; |
2944 | goto out; | |
1da177e4 LT |
2945 | } |
2946 | ||
1da177e4 | 2947 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2948 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2949 | /* load_nls_default cannot return null */ |
2950 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2951 | } else { |
a5fc4ce0 JL |
2952 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2953 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2954 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2955 | volume_info->iocharset); | |
70fe7dc0 JL |
2956 | rc = -ELIBACC; |
2957 | goto out; | |
1da177e4 LT |
2958 | } |
2959 | } | |
724d9f1c PS |
2960 | |
2961 | *pvolume_info = volume_info; | |
2962 | return rc; | |
2963 | out: | |
2964 | cifs_cleanup_volume_info(&volume_info); | |
2965 | return rc; | |
2966 | } | |
2967 | ||
2968 | int | |
2969 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
2970 | struct smb_vol *volume_info, const char *devname) | |
2971 | { | |
2972 | int rc = 0; | |
2973 | int xid; | |
2974 | struct cifsSesInfo *pSesInfo; | |
2975 | struct cifsTconInfo *tcon; | |
2976 | struct TCP_Server_Info *srvTcp; | |
2977 | char *full_path; | |
2978 | struct tcon_link *tlink; | |
2979 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
2980 | int referral_walks_count = 0; | |
2981 | try_mount_again: | |
2982 | /* cleanup activities if we're chasing a referral */ | |
2983 | if (referral_walks_count) { | |
2984 | if (tcon) | |
2985 | cifs_put_tcon(tcon); | |
2986 | else if (pSesInfo) | |
2987 | cifs_put_smb_ses(pSesInfo); | |
2988 | ||
2989 | cifs_cleanup_volume_info(&volume_info); | |
2990 | FreeXid(xid); | |
2991 | } | |
2992 | #endif | |
2993 | tcon = NULL; | |
2994 | pSesInfo = NULL; | |
2995 | srvTcp = NULL; | |
2996 | full_path = NULL; | |
2997 | tlink = NULL; | |
2998 | ||
2999 | xid = GetXid(); | |
1da177e4 | 3000 | |
63c038c2 | 3001 | /* get a reference to a tcp session */ |
7586b765 | 3002 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3003 | if (IS_ERR(srvTcp)) { |
3004 | rc = PTR_ERR(srvTcp); | |
3005 | goto out; | |
1da177e4 LT |
3006 | } |
3007 | ||
36988c76 JL |
3008 | /* get a reference to a SMB session */ |
3009 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3010 | if (IS_ERR(pSesInfo)) { | |
3011 | rc = PTR_ERR(pSesInfo); | |
3012 | pSesInfo = NULL; | |
3013 | goto mount_fail_check; | |
1da177e4 | 3014 | } |
50c2f753 | 3015 | |
d00c28de JL |
3016 | if (pSesInfo->capabilities & CAP_LARGE_FILES) |
3017 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
3018 | else | |
3019 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 3020 | |
8af18971 | 3021 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
3022 | sb->s_time_gran = 100; |
3023 | ||
d00c28de JL |
3024 | /* search for existing tcon to this server share */ |
3025 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3026 | if (IS_ERR(tcon)) { | |
3027 | rc = PTR_ERR(tcon); | |
3028 | tcon = NULL; | |
1bfe73c2 | 3029 | goto remote_path_check; |
d00c28de | 3030 | } |
1bfe73c2 | 3031 | |
d82c2df5 | 3032 | /* tell server which Unix caps we support */ |
6848b733 | 3033 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3034 | /* reset of caps checks mount to see if unix extensions |
3035 | disabled for just this mount */ | |
7586b765 | 3036 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
6848b733 SF |
3037 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3038 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3039 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3040 | rc = -EACCES; | |
3041 | goto mount_fail_check; | |
3042 | } | |
3043 | } else | |
d82c2df5 | 3044 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3045 | |
6848b733 SF |
3046 | /* do not care if following two calls succeed - informational */ |
3047 | if (!tcon->ipc) { | |
3048 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3049 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3050 | } | |
3051 | ||
d82c2df5 SF |
3052 | /* convert forward to back slashes in prepath here if needed */ |
3053 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
3054 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 3055 | |
d82c2df5 SF |
3056 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
3057 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 3058 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 3059 | } |
d82c2df5 SF |
3060 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) |
3061 | cifs_sb->rsize = min(cifs_sb->rsize, | |
3062 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 3063 | |
f7910cbd JL |
3064 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
3065 | ||
1bfe73c2 | 3066 | remote_path_check: |
c1508ca2 SF |
3067 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3068 | /* | |
3069 | * Perform an unconditional check for whether there are DFS | |
3070 | * referrals for this path without prefix, to provide support | |
3071 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3072 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3073 | * Chase the referral if found, otherwise continue normally. | |
3074 | */ | |
3075 | if (referral_walks_count == 0) { | |
3076 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3077 | cifs_sb, false); |
c1508ca2 SF |
3078 | if (!refrc) { |
3079 | referral_walks_count++; | |
3080 | goto try_mount_again; | |
3081 | } | |
3082 | } | |
3083 | #endif | |
3084 | ||
1bfe73c2 | 3085 | /* check if a whole path (including prepath) is not remote */ |
70945643 | 3086 | if (!rc && tcon) { |
e4cce94c | 3087 | /* build_path_to_root works only when we have a valid tcon */ |
7d161b7f | 3088 | full_path = cifs_build_path_to_root(cifs_sb, tcon); |
e4cce94c IM |
3089 | if (full_path == NULL) { |
3090 | rc = -ENOMEM; | |
3091 | goto mount_fail_check; | |
3092 | } | |
3093 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3094 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3095 | kfree(full_path); |
3096 | goto mount_fail_check; | |
3097 | } | |
3098 | kfree(full_path); | |
3099 | } | |
3100 | ||
1bfe73c2 IM |
3101 | /* get referral if needed */ |
3102 | if (rc == -EREMOTE) { | |
d036f50f | 3103 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3104 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3105 | /* | |
3106 | * BB: when we implement proper loop detection, | |
3107 | * we will remove this check. But now we need it | |
3108 | * to prevent an indefinite loop if 'DFS tree' is | |
3109 | * misconfigured (i.e. has loops). | |
3110 | */ | |
3111 | rc = -ELOOP; | |
3112 | goto mount_fail_check; | |
3113 | } | |
1bfe73c2 IM |
3114 | /* convert forward to back slashes in prepath here if needed */ |
3115 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
3116 | convert_delimiter(cifs_sb->prepath, | |
3117 | CIFS_DIR_SEP(cifs_sb)); | |
1bfe73c2 | 3118 | |
dd613945 | 3119 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3120 | true); |
7b91e266 | 3121 | |
dd613945 | 3122 | if (!rc) { |
5c2503a8 | 3123 | referral_walks_count++; |
1bfe73c2 IM |
3124 | goto try_mount_again; |
3125 | } | |
dd613945 | 3126 | goto mount_fail_check; |
d036f50f SF |
3127 | #else /* No DFS support, return error on mount */ |
3128 | rc = -EOPNOTSUPP; | |
3129 | #endif | |
1bfe73c2 IM |
3130 | } |
3131 | ||
9d002df4 JL |
3132 | if (rc) |
3133 | goto mount_fail_check; | |
3134 | ||
3135 | /* now, hang the tcon off of the superblock */ | |
3136 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3137 | if (tlink == NULL) { | |
3138 | rc = -ENOMEM; | |
3139 | goto mount_fail_check; | |
3140 | } | |
3141 | ||
b647c35f | 3142 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3143 | tlink->tl_tcon = tcon; |
3144 | tlink->tl_time = jiffies; | |
3145 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3146 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3147 | ||
b647c35f | 3148 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3149 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3150 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3151 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3152 | |
2de970ff JL |
3153 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
3154 | TLINK_IDLE_EXPIRE); | |
3155 | ||
1bfe73c2 IM |
3156 | mount_fail_check: |
3157 | /* on error free sesinfo and tcon struct if needed */ | |
3158 | if (rc) { | |
1bfe73c2 | 3159 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3160 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3161 | if (tcon) |
3162 | cifs_put_tcon(tcon); | |
3163 | else if (pSesInfo) | |
3164 | cifs_put_smb_ses(pSesInfo); | |
3165 | else | |
3166 | cifs_put_tcp_session(srvTcp); | |
3167 | goto out; | |
3168 | } | |
3169 | ||
7586b765 | 3170 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
3171 | (in which case it is not needed anymore) but when new sesion is created |
3172 | the password ptr is put in the new session structure (in which case the | |
3173 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
3174 | out: |
3175 | /* zero out password before freeing */ | |
1da177e4 LT |
3176 | FreeXid(xid); |
3177 | return rc; | |
3178 | } | |
3179 | ||
1da177e4 LT |
3180 | int |
3181 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
3182 | const char *tree, struct cifsTconInfo *tcon, | |
3183 | const struct nls_table *nls_codepage) | |
3184 | { | |
3185 | struct smb_hdr *smb_buffer; | |
3186 | struct smb_hdr *smb_buffer_response; | |
3187 | TCONX_REQ *pSMB; | |
3188 | TCONX_RSP *pSMBr; | |
3189 | unsigned char *bcc_ptr; | |
3190 | int rc = 0; | |
690c522f JL |
3191 | int length; |
3192 | __u16 bytes_left, count; | |
1da177e4 LT |
3193 | |
3194 | if (ses == NULL) | |
3195 | return -EIO; | |
3196 | ||
3197 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3198 | if (smb_buffer == NULL) |
1da177e4 | 3199 | return -ENOMEM; |
ca43e3be | 3200 | |
1da177e4 LT |
3201 | smb_buffer_response = smb_buffer; |
3202 | ||
3203 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3204 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
3205 | |
3206 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
3207 | smb_buffer->Uid = ses->Suid; |
3208 | pSMB = (TCONX_REQ *) smb_buffer; | |
3209 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3210 | ||
3211 | pSMB->AndXCommand = 0xFF; | |
3212 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3213 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 3214 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 3215 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3216 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3217 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3218 | /* already aligned so no need to do it below */ |
eeac8047 | 3219 | } else { |
540b2e37 | 3220 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3221 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3222 | specified as required (when that support is added to | |
3223 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3224 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3225 | by Samba (not sure whether other servers allow |
3226 | NTLMv2 password here) */ | |
7c7b25bc | 3227 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3228 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3229 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3230 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
4e53a3fb JL |
3231 | ses->server->secMode & |
3232 | SECMODE_PW_ENCRYPT ? true : false, | |
3233 | bcc_ptr); | |
7c7b25bc SF |
3234 | else |
3235 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 SP |
3236 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
3237 | bcc_ptr); | |
eeac8047 | 3238 | |
540b2e37 | 3239 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3240 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3241 | /* must align unicode strings */ |
3242 | *bcc_ptr = 0; /* null byte password */ | |
3243 | bcc_ptr++; | |
3244 | } | |
eeac8047 | 3245 | } |
1da177e4 | 3246 | |
50c2f753 | 3247 | if (ses->server->secMode & |
a878fb22 | 3248 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3249 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3250 | ||
3251 | if (ses->capabilities & CAP_STATUS32) { | |
3252 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3253 | } | |
3254 | if (ses->capabilities & CAP_DFS) { | |
3255 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3256 | } | |
3257 | if (ses->capabilities & CAP_UNICODE) { | |
3258 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3259 | length = | |
50c2f753 SF |
3260 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
3261 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
3262 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3263 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3264 | bcc_ptr += 2; /* skip trailing null */ |
3265 | } else { /* ASCII */ | |
1da177e4 LT |
3266 | strcpy(bcc_ptr, tree); |
3267 | bcc_ptr += strlen(tree) + 1; | |
3268 | } | |
3269 | strcpy(bcc_ptr, "?????"); | |
3270 | bcc_ptr += strlen("?????"); | |
3271 | bcc_ptr += 1; | |
3272 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3273 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3274 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3275 | pSMB->ByteCount = cpu_to_le16(count); |
3276 | ||
133672ef | 3277 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3278 | 0); |
1da177e4 | 3279 | |
1da177e4 LT |
3280 | /* above now done in SendReceive */ |
3281 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3282 | bool is_unicode; |
3283 | ||
1da177e4 | 3284 | tcon->tidStatus = CifsGood; |
3b795210 | 3285 | tcon->need_reconnect = false; |
1da177e4 LT |
3286 | tcon->tid = smb_buffer_response->Tid; |
3287 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3288 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3289 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3290 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3291 | is_unicode = true; | |
3292 | else | |
3293 | is_unicode = false; | |
3294 | ||
cc20c031 | 3295 | |
50c2f753 | 3296 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3297 | if (length == 3) { |
3298 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3299 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3300 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3301 | tcon->ipc = 1; |
3302 | } | |
3303 | } else if (length == 2) { | |
3304 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3305 | /* the most common case */ | |
b6b38f70 | 3306 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3307 | } |
3308 | } | |
50c2f753 | 3309 | bcc_ptr += length + 1; |
cc20c031 | 3310 | bytes_left -= (length + 1); |
1da177e4 | 3311 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3312 | |
3313 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3314 | kfree(tcon->nativeFileSystem); |
d185cda7 | 3315 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 3316 | bytes_left, is_unicode, |
cc20c031 JL |
3317 | nls_codepage); |
3318 | ||
b6b38f70 | 3319 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3320 | |
fb8c4b14 | 3321 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3322 | (smb_buffer_response->WordCount == 7)) |
3323 | /* field is in same location */ | |
3979877e SF |
3324 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3325 | else | |
3326 | tcon->Flags = 0; | |
b6b38f70 | 3327 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3328 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3329 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3330 | ses->ipc_tid = smb_buffer_response->Tid; |
3331 | } | |
3332 | ||
a8a11d39 | 3333 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3334 | return rc; |
3335 | } | |
3336 | ||
3337 | int | |
3338 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
3339 | { | |
b647c35f JL |
3340 | struct rb_root *root = &cifs_sb->tlink_tree; |
3341 | struct rb_node *node; | |
3342 | struct tcon_link *tlink; | |
50c2f753 | 3343 | char *tmp; |
9d002df4 | 3344 | |
2de970ff JL |
3345 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3346 | ||
b647c35f JL |
3347 | spin_lock(&cifs_sb->tlink_tree_lock); |
3348 | while ((node = rb_first(root))) { | |
3349 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3350 | cifs_get_tlink(tlink); | |
3351 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3352 | rb_erase(node, root); | |
1da177e4 | 3353 | |
b647c35f JL |
3354 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3355 | cifs_put_tlink(tlink); | |
3356 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3357 | } | |
3358 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3359 | |
2fe87f02 SF |
3360 | tmp = cifs_sb->prepath; |
3361 | cifs_sb->prepathlen = 0; | |
3362 | cifs_sb->prepath = NULL; | |
3363 | kfree(tmp); | |
1da177e4 | 3364 | |
9d002df4 | 3365 | return 0; |
50c2f753 | 3366 | } |
1da177e4 | 3367 | |
198b5682 | 3368 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
3369 | { |
3370 | int rc = 0; | |
198b5682 | 3371 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3372 | |
198b5682 JL |
3373 | /* only send once per connect */ |
3374 | if (server->maxBuf != 0) | |
3375 | return 0; | |
3376 | ||
3377 | rc = CIFSSMBNegotiate(xid, ses); | |
3378 | if (rc == -EAGAIN) { | |
3379 | /* retry only once on 1st time connection */ | |
3380 | rc = CIFSSMBNegotiate(xid, ses); | |
3381 | if (rc == -EAGAIN) | |
3382 | rc = -EHOSTDOWN; | |
1da177e4 | 3383 | } |
198b5682 JL |
3384 | if (rc == 0) { |
3385 | spin_lock(&GlobalMid_Lock); | |
3386 | if (server->tcpStatus != CifsExiting) | |
3387 | server->tcpStatus = CifsGood; | |
3388 | else | |
3389 | rc = -EHOSTDOWN; | |
3390 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 3391 | |
198b5682 JL |
3392 | } |
3393 | ||
3394 | return rc; | |
3395 | } | |
3396 | ||
3397 | ||
3398 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
3399 | struct nls_table *nls_info) | |
3400 | { | |
3401 | int rc = 0; | |
3402 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 3403 | |
198b5682 JL |
3404 | ses->flags = 0; |
3405 | ses->capabilities = server->capabilities; | |
26b994fa | 3406 | if (linuxExtEnabled == 0) |
198b5682 | 3407 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 3408 | |
b6b38f70 JP |
3409 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
3410 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 3411 | |
198b5682 | 3412 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 3413 | if (rc) { |
b6b38f70 | 3414 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3415 | } else { |
5d0d2882 SP |
3416 | mutex_lock(&ses->server->srv_mutex); |
3417 | if (!server->session_estab) { | |
21e73393 | 3418 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3419 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3420 | server->sequence_number = 0x2; |
3421 | server->session_estab = true; | |
3422 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3423 | } |
3424 | mutex_unlock(&server->srv_mutex); | |
3425 | ||
b6b38f70 | 3426 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3427 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3428 | ses->status = CifsGood; |
3429 | ses->need_reconnect = false; | |
20418acd | 3430 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3431 | } |
26b994fa | 3432 | |
21e73393 SP |
3433 | kfree(ses->auth_key.response); |
3434 | ses->auth_key.response = NULL; | |
3435 | ses->auth_key.len = 0; | |
d3686d54 SP |
3436 | kfree(ses->ntlmssp); |
3437 | ses->ntlmssp = NULL; | |
21e73393 | 3438 | |
1da177e4 LT |
3439 | return rc; |
3440 | } | |
3441 | ||
d2445556 | 3442 | static struct cifsTconInfo * |
9d002df4 JL |
3443 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3444 | { | |
3445 | struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb); | |
3446 | struct cifsSesInfo *ses; | |
3447 | struct cifsTconInfo *tcon = NULL; | |
3448 | struct smb_vol *vol_info; | |
34c87901 SF |
3449 | char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */ |
3450 | /* We used to have this as MAX_USERNAME which is */ | |
3451 | /* way too big now (256 instead of 32) */ | |
9d002df4 JL |
3452 | |
3453 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
3454 | if (vol_info == NULL) { | |
3455 | tcon = ERR_PTR(-ENOMEM); | |
3456 | goto out; | |
3457 | } | |
3458 | ||
3459 | snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); | |
3460 | vol_info->username = username; | |
3461 | vol_info->local_nls = cifs_sb->local_nls; | |
3462 | vol_info->linux_uid = fsuid; | |
3463 | vol_info->cred_uid = fsuid; | |
3464 | vol_info->UNC = master_tcon->treeName; | |
3465 | vol_info->retry = master_tcon->retry; | |
3466 | vol_info->nocase = master_tcon->nocase; | |
3467 | vol_info->local_lease = master_tcon->local_lease; | |
3468 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3469 | ||
3470 | /* FIXME: allow for other secFlg settings */ | |
3471 | vol_info->secFlg = CIFSSEC_MUST_KRB5; | |
3472 | ||
3473 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3474 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3475 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3476 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3477 | |
3478 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3479 | if (IS_ERR(ses)) { | |
3480 | tcon = (struct cifsTconInfo *)ses; | |
3481 | cifs_put_tcp_session(master_tcon->ses->server); | |
3482 | goto out; | |
3483 | } | |
3484 | ||
3485 | tcon = cifs_get_tcon(ses, vol_info); | |
3486 | if (IS_ERR(tcon)) { | |
3487 | cifs_put_smb_ses(ses); | |
3488 | goto out; | |
3489 | } | |
3490 | ||
3491 | if (ses->capabilities & CAP_UNIX) | |
3492 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
3493 | out: | |
3494 | kfree(vol_info); | |
3495 | ||
3496 | return tcon; | |
3497 | } | |
3498 | ||
413e661c | 3499 | static inline struct tcon_link * |
9d002df4 JL |
3500 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3501 | { | |
413e661c | 3502 | return cifs_sb->master_tlink; |
9d002df4 JL |
3503 | } |
3504 | ||
3505 | struct cifsTconInfo * | |
3506 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) | |
3507 | { | |
3508 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3509 | } | |
3510 | ||
3511 | static int | |
3512 | cifs_sb_tcon_pending_wait(void *unused) | |
3513 | { | |
3514 | schedule(); | |
3515 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3516 | } | |
3517 | ||
b647c35f JL |
3518 | /* find and return a tlink with given uid */ |
3519 | static struct tcon_link * | |
3520 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3521 | { | |
3522 | struct rb_node *node = root->rb_node; | |
3523 | struct tcon_link *tlink; | |
3524 | ||
3525 | while (node) { | |
3526 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3527 | ||
3528 | if (tlink->tl_uid > uid) | |
3529 | node = node->rb_left; | |
3530 | else if (tlink->tl_uid < uid) | |
3531 | node = node->rb_right; | |
3532 | else | |
3533 | return tlink; | |
3534 | } | |
3535 | return NULL; | |
3536 | } | |
3537 | ||
3538 | /* insert a tcon_link into the tree */ | |
3539 | static void | |
3540 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3541 | { | |
3542 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3543 | struct tcon_link *tlink; | |
3544 | ||
3545 | while (*new) { | |
3546 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3547 | parent = *new; | |
3548 | ||
3549 | if (tlink->tl_uid > new_tlink->tl_uid) | |
3550 | new = &((*new)->rb_left); | |
3551 | else | |
3552 | new = &((*new)->rb_right); | |
3553 | } | |
3554 | ||
3555 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3556 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3557 | } | |
3558 | ||
9d002df4 JL |
3559 | /* |
3560 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3561 | * current task. | |
3562 | * | |
3563 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3564 | * the master tcon for the mount. | |
3565 | * | |
6ef933a3 | 3566 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3567 | * exists, then check to see if it's pending construction. If it is then wait |
3568 | * for construction to complete. Once it's no longer pending, check to see if | |
3569 | * it failed and either return an error or retry construction, depending on | |
3570 | * the timeout. | |
3571 | * | |
3572 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3573 | * try to construct a new one. | |
3574 | */ | |
3575 | struct tcon_link * | |
3576 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3577 | { | |
3578 | int ret; | |
b647c35f | 3579 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
3580 | struct tcon_link *tlink, *newtlink; |
3581 | ||
3582 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
3583 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3584 | ||
3585 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 3586 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3587 | if (tlink) |
3588 | cifs_get_tlink(tlink); | |
3589 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3590 | ||
3591 | if (tlink == NULL) { | |
3592 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
3593 | if (newtlink == NULL) | |
3594 | return ERR_PTR(-ENOMEM); | |
b647c35f | 3595 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
3596 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
3597 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
3598 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
3599 | cifs_get_tlink(newtlink); | |
3600 | ||
9d002df4 JL |
3601 | spin_lock(&cifs_sb->tlink_tree_lock); |
3602 | /* was one inserted after previous search? */ | |
b647c35f | 3603 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
3604 | if (tlink) { |
3605 | cifs_get_tlink(tlink); | |
3606 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3607 | kfree(newtlink); |
3608 | goto wait_for_construction; | |
3609 | } | |
9d002df4 | 3610 | tlink = newtlink; |
b647c35f JL |
3611 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
3612 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
3613 | } else { |
3614 | wait_for_construction: | |
3615 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
3616 | cifs_sb_tcon_pending_wait, | |
3617 | TASK_INTERRUPTIBLE); | |
3618 | if (ret) { | |
3619 | cifs_put_tlink(tlink); | |
3620 | return ERR_PTR(ret); | |
3621 | } | |
3622 | ||
3623 | /* if it's good, return it */ | |
3624 | if (!IS_ERR(tlink->tl_tcon)) | |
3625 | return tlink; | |
3626 | ||
3627 | /* return error if we tried this already recently */ | |
3628 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
3629 | cifs_put_tlink(tlink); | |
3630 | return ERR_PTR(-EACCES); | |
3631 | } | |
3632 | ||
3633 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
3634 | goto wait_for_construction; | |
3635 | } | |
3636 | ||
3637 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
3638 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
3639 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
3640 | ||
3641 | if (IS_ERR(tlink->tl_tcon)) { | |
3642 | cifs_put_tlink(tlink); | |
3643 | return ERR_PTR(-EACCES); | |
3644 | } | |
3645 | ||
3646 | return tlink; | |
3647 | } | |
2de970ff JL |
3648 | |
3649 | /* | |
3650 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
3651 | * out tcons. | |
3652 | */ | |
3653 | static void | |
3654 | cifs_prune_tlinks(struct work_struct *work) | |
3655 | { | |
3656 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
3657 | prune_tlinks.work); | |
b647c35f JL |
3658 | struct rb_root *root = &cifs_sb->tlink_tree; |
3659 | struct rb_node *node = rb_first(root); | |
3660 | struct rb_node *tmp; | |
3661 | struct tcon_link *tlink; | |
2de970ff | 3662 | |
b647c35f JL |
3663 | /* |
3664 | * Because we drop the spinlock in the loop in order to put the tlink | |
3665 | * it's not guarded against removal of links from the tree. The only | |
3666 | * places that remove entries from the tree are this function and | |
3667 | * umounts. Because this function is non-reentrant and is canceled | |
3668 | * before umount can proceed, this is safe. | |
3669 | */ | |
3670 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3671 | node = rb_first(root); | |
3672 | while (node != NULL) { | |
3673 | tmp = node; | |
3674 | node = rb_next(tmp); | |
3675 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
3676 | ||
3677 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
3678 | atomic_read(&tlink->tl_count) != 0 || | |
3679 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
3680 | continue; | |
2de970ff | 3681 | |
b647c35f JL |
3682 | cifs_get_tlink(tlink); |
3683 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3684 | rb_erase(tmp, root); | |
3685 | ||
3686 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
3687 | cifs_put_tlink(tlink); | |
3688 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3689 | } | |
3690 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff JL |
3691 | |
3692 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, | |
3693 | TLINK_IDLE_EXPIRE); | |
3694 | } |