4 * Copyright (C) International Business Machines Corp., 2002,2009
5 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/slab.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <linux/namei.h>
37 #include <asm/uaccess.h>
38 #include <asm/processor.h>
39 #include <linux/inet.h>
43 #include "cifsproto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
46 #include "cifs_fs_sb.h"
49 #include "rfc1002pdu.h"
54 #define RFC1001_PORT 139
56 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
59 extern mempool_t *cifs_req_poolp;
67 char *iocharset; /* local code page for mapping to and from Unicode */
68 char source_rfc1001_name[16]; /* netbios name of client */
69 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
83 bool no_psx_acl:1; /* set if posix acl support should be disabled */
85 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
86 bool server_ino:1; /* use inode numbers from server ie UniqueId */
88 bool remap:1; /* set to remap seven reserved chars in filenames */
89 bool posix_paths:1; /* unset to not ask for posix pathnames. */
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 */
95 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
96 bool seal:1; /* request transport encryption on share */
97 bool nodfs:1; /* Do not request DFS, even if available */
98 bool local_lease:1; /* check leases only on local system, not remote */
101 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
102 bool fsc:1; /* enable fscache */
105 bool sockopt_tcp_nodelay:1;
106 unsigned short int port;
108 struct nls_table *local_nls;
111 static int ipv4_connect(struct TCP_Server_Info *server);
112 static int ipv6_connect(struct TCP_Server_Info *server);
115 * cifs tcp session reconnection
117 * mark tcp session as reconnecting so temporarily locked
118 * mark all smb sessions as reconnecting for tcp session
119 * reconnect tcp session
120 * wake up waiters on reconnection? - (not needed currently)
123 cifs_reconnect(struct TCP_Server_Info *server)
126 struct list_head *tmp, *tmp2;
127 struct cifsSesInfo *ses;
128 struct cifsTconInfo *tcon;
129 struct mid_q_entry *mid_entry;
131 spin_lock(&GlobalMid_Lock);
132 if (server->tcpStatus == CifsExiting) {
133 /* the demux thread will exit normally
134 next time through the loop */
135 spin_unlock(&GlobalMid_Lock);
138 server->tcpStatus = CifsNeedReconnect;
139 spin_unlock(&GlobalMid_Lock);
142 cFYI(1, "Reconnecting tcp session");
144 /* before reconnecting the tcp session, mark the smb session (uid)
145 and the tid bad so they are not used until reconnected */
146 read_lock(&cifs_tcp_ses_lock);
147 list_for_each(tmp, &server->smb_ses_list) {
148 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
149 ses->need_reconnect = true;
151 list_for_each(tmp2, &ses->tcon_list) {
152 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
153 tcon->need_reconnect = true;
156 read_unlock(&cifs_tcp_ses_lock);
157 /* do not want to be sending data on a socket we are freeing */
158 mutex_lock(&server->srv_mutex);
159 if (server->ssocket) {
160 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
161 server->ssocket->flags);
162 kernel_sock_shutdown(server->ssocket, SHUT_WR);
163 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
164 server->ssocket->state,
165 server->ssocket->flags);
166 sock_release(server->ssocket);
167 server->ssocket = NULL;
170 spin_lock(&GlobalMid_Lock);
171 list_for_each(tmp, &server->pending_mid_q) {
172 mid_entry = list_entry(tmp, struct
175 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
176 /* Mark other intransit requests as needing
177 retry so we do not immediately mark the
178 session bad again (ie after we reconnect
179 below) as they timeout too */
180 mid_entry->midState = MID_RETRY_NEEDED;
183 spin_unlock(&GlobalMid_Lock);
184 mutex_unlock(&server->srv_mutex);
186 while ((server->tcpStatus != CifsExiting) &&
187 (server->tcpStatus != CifsGood)) {
189 if (server->addr.sockAddr6.sin6_family == AF_INET6)
190 rc = ipv6_connect(server);
192 rc = ipv4_connect(server);
194 cFYI(1, "reconnect error %d", rc);
197 atomic_inc(&tcpSesReconnectCount);
198 spin_lock(&GlobalMid_Lock);
199 if (server->tcpStatus != CifsExiting)
200 server->tcpStatus = CifsGood;
201 server->sequence_number = 0;
202 spin_unlock(&GlobalMid_Lock);
203 /* atomic_set(&server->inFlight,0);*/
204 wake_up(&server->response_q);
212 0 not a transact2, or all data present
213 >0 transact2 with that much data missing
214 -EINVAL = invalid transact2
217 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
219 struct smb_t2_rsp *pSMBt;
221 int data_in_this_rsp;
224 if (pSMB->Command != SMB_COM_TRANSACTION2)
227 /* check for plausible wct, bcc and t2 data and parm sizes */
228 /* check for parm and data offset going beyond end of smb */
229 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
230 cFYI(1, "invalid transact2 word count");
234 pSMBt = (struct smb_t2_rsp *)pSMB;
236 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
237 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
239 remaining = total_data_size - data_in_this_rsp;
243 else if (remaining < 0) {
244 cFYI(1, "total data %d smaller than data in frame %d",
245 total_data_size, data_in_this_rsp);
248 cFYI(1, "missing %d bytes from transact2, check next response",
250 if (total_data_size > maxBufSize) {
251 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
252 total_data_size, maxBufSize);
259 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
261 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
262 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
267 char *data_area_of_target;
268 char *data_area_of_buf2;
271 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
273 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
274 cFYI(1, "total data size of primary and secondary t2 differ");
277 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
279 remaining = total_data_size - total_in_buf;
284 if (remaining == 0) /* nothing to do, ignore */
287 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
288 if (remaining < total_in_buf2) {
289 cFYI(1, "transact2 2nd response contains too much data");
292 /* find end of first SMB data area */
293 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
294 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
295 /* validate target area */
297 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
298 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
300 data_area_of_target += total_in_buf;
302 /* copy second buffer into end of first buffer */
303 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
304 total_in_buf += total_in_buf2;
305 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
306 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
307 byte_count += total_in_buf2;
308 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
310 byte_count = pTargetSMB->smb_buf_length;
311 byte_count += total_in_buf2;
313 /* BB also add check that we are not beyond maximum buffer size */
315 pTargetSMB->smb_buf_length = byte_count;
317 if (remaining == total_in_buf2) {
318 cFYI(1, "found the last secondary response");
319 return 0; /* we are done */
320 } else /* more responses to go */
326 cifs_demultiplex_thread(struct TCP_Server_Info *server)
329 unsigned int pdu_length, total_read;
330 struct smb_hdr *smb_buffer = NULL;
331 struct smb_hdr *bigbuf = NULL;
332 struct smb_hdr *smallbuf = NULL;
333 struct msghdr smb_msg;
335 struct socket *csocket = server->ssocket;
336 struct list_head *tmp;
337 struct cifsSesInfo *ses;
338 struct task_struct *task_to_wake = NULL;
339 struct mid_q_entry *mid_entry;
341 bool isLargeBuf = false;
345 current->flags |= PF_MEMALLOC;
346 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
348 length = atomic_inc_return(&tcpSesAllocCount);
350 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
354 while (server->tcpStatus != CifsExiting) {
357 if (bigbuf == NULL) {
358 bigbuf = cifs_buf_get();
360 cERROR(1, "No memory for large SMB response");
362 /* retry will check if exiting */
365 } else if (isLargeBuf) {
366 /* we are reusing a dirty large buf, clear its start */
367 memset(bigbuf, 0, sizeof(struct smb_hdr));
370 if (smallbuf == NULL) {
371 smallbuf = cifs_small_buf_get();
373 cERROR(1, "No memory for SMB response");
375 /* retry will check if exiting */
378 /* beginning of smb buffer is cleared in our buf_get */
379 } else /* if existing small buf clear beginning */
380 memset(smallbuf, 0, sizeof(struct smb_hdr));
384 smb_buffer = smallbuf;
385 iov.iov_base = smb_buffer;
387 smb_msg.msg_control = NULL;
388 smb_msg.msg_controllen = 0;
389 pdu_length = 4; /* enough to get RFC1001 header */
392 kernel_recvmsg(csocket, &smb_msg,
393 &iov, 1, pdu_length, 0 /* BB other flags? */);
395 if (server->tcpStatus == CifsExiting) {
397 } else if (server->tcpStatus == CifsNeedReconnect) {
398 cFYI(1, "Reconnect after server stopped responding");
399 cifs_reconnect(server);
400 cFYI(1, "call to reconnect done");
401 csocket = server->ssocket;
403 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
404 msleep(1); /* minimum sleep to prevent looping
405 allowing socket to clear and app threads to set
406 tcpStatus CifsNeedReconnect if server hung */
407 if (pdu_length < 4) {
408 iov.iov_base = (4 - pdu_length) +
410 iov.iov_len = pdu_length;
411 smb_msg.msg_control = NULL;
412 smb_msg.msg_controllen = 0;
416 } else if (length <= 0) {
417 if (server->tcpStatus == CifsNew) {
418 cFYI(1, "tcp session abend after SMBnegprot");
419 /* some servers kill the TCP session rather than
420 returning an SMB negprot error, in which
421 case reconnecting here is not going to help,
422 and so simply return error to mount */
425 if (!try_to_freeze() && (length == -EINTR)) {
426 cFYI(1, "cifsd thread killed");
429 cFYI(1, "Reconnect after unexpected peek error %d",
431 cifs_reconnect(server);
432 csocket = server->ssocket;
433 wake_up(&server->response_q);
435 } else if (length < pdu_length) {
436 cFYI(1, "requested %d bytes but only got %d bytes",
438 pdu_length -= length;
443 /* The right amount was read from socket - 4 bytes */
444 /* so we can now interpret the length field */
446 /* the first byte big endian of the length field,
447 is actually not part of the length but the type
448 with the most common, zero, as regular data */
449 temp = *((char *) smb_buffer);
451 /* Note that FC 1001 length is big endian on the wire,
452 but we convert it here so it is always manipulated
453 as host byte order */
454 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
455 smb_buffer->smb_buf_length = pdu_length;
457 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
459 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
461 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
462 cFYI(1, "Good RFC 1002 session rsp");
464 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
465 /* we get this from Windows 98 instead of
466 an error on SMB negprot response */
467 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
469 if (server->tcpStatus == CifsNew) {
470 /* if nack on negprot (rather than
471 ret of smb negprot error) reconnecting
472 not going to help, ret error to mount */
475 /* give server a second to
476 clean up before reconnect attempt */
478 /* always try 445 first on reconnect
479 since we get NACK on some if we ever
480 connected to port 139 (the NACK is
481 since we do not begin with RFC1001
482 session initialize frame) */
483 server->addr.sockAddr.sin_port =
485 cifs_reconnect(server);
486 csocket = server->ssocket;
487 wake_up(&server->response_q);
490 } else if (temp != (char) 0) {
491 cERROR(1, "Unknown RFC 1002 frame");
492 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
494 cifs_reconnect(server);
495 csocket = server->ssocket;
499 /* else we have an SMB response */
500 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
501 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
502 cERROR(1, "Invalid size SMB length %d pdu_length %d",
503 length, pdu_length+4);
504 cifs_reconnect(server);
505 csocket = server->ssocket;
506 wake_up(&server->response_q);
513 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
515 memcpy(bigbuf, smallbuf, 4);
519 iov.iov_base = 4 + (char *)smb_buffer;
520 iov.iov_len = pdu_length;
521 for (total_read = 0; total_read < pdu_length;
522 total_read += length) {
523 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
524 pdu_length - total_read, 0);
525 if ((server->tcpStatus == CifsExiting) ||
526 (length == -EINTR)) {
530 } else if (server->tcpStatus == CifsNeedReconnect) {
531 cifs_reconnect(server);
532 csocket = server->ssocket;
533 /* Reconnect wakes up rspns q */
534 /* Now we will reread sock */
537 } else if ((length == -ERESTARTSYS) ||
538 (length == -EAGAIN)) {
539 msleep(1); /* minimum sleep to prevent looping,
540 allowing socket to clear and app
541 threads to set tcpStatus
542 CifsNeedReconnect if server hung*/
545 } else if (length <= 0) {
546 cERROR(1, "Received no data, expecting %d",
547 pdu_length - total_read);
548 cifs_reconnect(server);
549 csocket = server->ssocket;
556 else if (reconnect == 1)
559 length += 4; /* account for rfc1002 hdr */
562 dump_smb(smb_buffer, length);
563 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
564 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
570 spin_lock(&GlobalMid_Lock);
571 list_for_each(tmp, &server->pending_mid_q) {
572 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
574 if ((mid_entry->mid == smb_buffer->Mid) &&
575 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
576 (mid_entry->command == smb_buffer->Command)) {
577 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
578 /* We have a multipart transact2 resp */
580 if (mid_entry->resp_buf) {
581 /* merge response - fix up 1st*/
582 if (coalesce_t2(smb_buffer,
583 mid_entry->resp_buf)) {
584 mid_entry->multiRsp =
588 /* all parts received */
589 mid_entry->multiEnd =
595 cERROR(1, "1st trans2 resp needs bigbuf");
596 /* BB maybe we can fix this up, switch
597 to already allocated large buffer? */
599 /* Have first buffer */
600 mid_entry->resp_buf =
602 mid_entry->largeBuf =
609 mid_entry->resp_buf = smb_buffer;
610 mid_entry->largeBuf = isLargeBuf;
612 task_to_wake = mid_entry->tsk;
613 mid_entry->midState = MID_RESPONSE_RECEIVED;
614 #ifdef CONFIG_CIFS_STATS2
615 mid_entry->when_received = jiffies;
617 /* so we do not time out requests to server
618 which is still responding (since server could
619 be busy but not dead) */
620 server->lstrp = jiffies;
624 spin_unlock(&GlobalMid_Lock);
626 /* Was previous buf put in mpx struct for multi-rsp? */
628 /* smb buffer will be freed by user thread */
634 wake_up_process(task_to_wake);
635 } else if (!is_valid_oplock_break(smb_buffer, server) &&
637 cERROR(1, "No task to wake, unknown frame received! "
638 "NumMids %d", midCount.counter);
639 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
640 sizeof(struct smb_hdr));
641 #ifdef CONFIG_CIFS_DEBUG2
642 cifs_dump_detail(smb_buffer);
643 cifs_dump_mids(server);
644 #endif /* CIFS_DEBUG2 */
647 } /* end while !EXITING */
649 /* take it off the list, if it's not already */
650 write_lock(&cifs_tcp_ses_lock);
651 list_del_init(&server->tcp_ses_list);
652 write_unlock(&cifs_tcp_ses_lock);
654 spin_lock(&GlobalMid_Lock);
655 server->tcpStatus = CifsExiting;
656 spin_unlock(&GlobalMid_Lock);
657 wake_up_all(&server->response_q);
659 /* check if we have blocked requests that need to free */
660 /* Note that cifs_max_pending is normally 50, but
661 can be set at module install time to as little as two */
662 spin_lock(&GlobalMid_Lock);
663 if (atomic_read(&server->inFlight) >= cifs_max_pending)
664 atomic_set(&server->inFlight, cifs_max_pending - 1);
665 /* We do not want to set the max_pending too low or we
666 could end up with the counter going negative */
667 spin_unlock(&GlobalMid_Lock);
668 /* Although there should not be any requests blocked on
669 this queue it can not hurt to be paranoid and try to wake up requests
670 that may haven been blocked when more than 50 at time were on the wire
671 to the same server - they now will see the session is in exit state
672 and get out of SendReceive. */
673 wake_up_all(&server->request_q);
674 /* give those requests time to exit */
677 if (server->ssocket) {
678 sock_release(csocket);
679 server->ssocket = NULL;
681 /* buffer usuallly freed in free_mid - need to free it here on exit */
682 cifs_buf_release(bigbuf);
683 if (smallbuf) /* no sense logging a debug message if NULL */
684 cifs_small_buf_release(smallbuf);
687 * BB: we shouldn't have to do any of this. It shouldn't be
688 * possible to exit from the thread with active SMB sessions
690 read_lock(&cifs_tcp_ses_lock);
691 if (list_empty(&server->pending_mid_q)) {
692 /* loop through server session structures attached to this and
694 list_for_each(tmp, &server->smb_ses_list) {
695 ses = list_entry(tmp, struct cifsSesInfo,
697 ses->status = CifsExiting;
700 read_unlock(&cifs_tcp_ses_lock);
702 /* although we can not zero the server struct pointer yet,
703 since there are active requests which may depnd on them,
704 mark the corresponding SMB sessions as exiting too */
705 list_for_each(tmp, &server->smb_ses_list) {
706 ses = list_entry(tmp, struct cifsSesInfo,
708 ses->status = CifsExiting;
711 spin_lock(&GlobalMid_Lock);
712 list_for_each(tmp, &server->pending_mid_q) {
713 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
714 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
715 cFYI(1, "Clearing Mid 0x%x - waking up ",
717 task_to_wake = mid_entry->tsk;
719 wake_up_process(task_to_wake);
722 spin_unlock(&GlobalMid_Lock);
723 read_unlock(&cifs_tcp_ses_lock);
724 /* 1/8th of sec is more than enough time for them to exit */
728 if (!list_empty(&server->pending_mid_q)) {
729 /* mpx threads have not exited yet give them
730 at least the smb send timeout time for long ops */
731 /* due to delays on oplock break requests, we need
732 to wait at least 45 seconds before giving up
733 on a request getting a response and going ahead
735 cFYI(1, "Wait for exit from demultiplex thread");
737 /* if threads still have not exited they are probably never
738 coming home not much else we can do but free the memory */
741 /* last chance to mark ses pointers invalid
742 if there are any pointing to this (e.g
743 if a crazy root user tried to kill cifsd
744 kernel thread explicitly this might happen) */
745 /* BB: This shouldn't be necessary, see above */
746 read_lock(&cifs_tcp_ses_lock);
747 list_for_each(tmp, &server->smb_ses_list) {
748 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
751 read_unlock(&cifs_tcp_ses_lock);
753 kfree(server->hostname);
754 task_to_wake = xchg(&server->tsk, NULL);
757 length = atomic_dec_return(&tcpSesAllocCount);
759 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
762 /* if server->tsk was NULL then wait for a signal before exiting */
764 set_current_state(TASK_INTERRUPTIBLE);
765 while (!signal_pending(current)) {
767 set_current_state(TASK_INTERRUPTIBLE);
769 set_current_state(TASK_RUNNING);
772 module_put_and_exit(0);
775 /* extract the host portion of the UNC string */
777 extract_hostname(const char *unc)
783 /* skip double chars at beginning of string */
784 /* BB: check validity of these bytes? */
787 /* delimiter between hostname and sharename is always '\\' now */
788 delim = strchr(src, '\\');
790 return ERR_PTR(-EINVAL);
793 dst = kmalloc((len + 1), GFP_KERNEL);
795 return ERR_PTR(-ENOMEM);
797 memcpy(dst, src, len);
804 cifs_parse_mount_options(char *options, const char *devname,
809 unsigned int temp_len, i, j;
811 short int override_uid = -1;
812 short int override_gid = -1;
813 bool uid_specified = false;
814 bool gid_specified = false;
819 if (Local_System_Name[0] != 0)
820 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
822 char *nodename = utsname()->nodename;
823 int n = strnlen(nodename, 15);
824 memset(vol->source_rfc1001_name, 0x20, 15);
825 for (i = 0; i < n; i++) {
826 /* does not have to be perfect mapping since field is
827 informational, only used for servers that do not support
828 port 445 and it can be overridden at mount time */
829 vol->source_rfc1001_name[i] = toupper(nodename[i]);
832 vol->source_rfc1001_name[15] = 0;
833 /* null target name indicates to use *SMBSERVR default called name
834 if we end up sending RFC1001 session initialize */
835 vol->target_rfc1001_name[0] = 0;
836 vol->cred_uid = current_uid();
837 vol->linux_uid = current_uid();
838 vol->linux_gid = current_gid();
840 /* default to only allowing write access to owner of the mount */
841 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
843 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
844 /* default is always to request posix paths. */
845 vol->posix_paths = 1;
846 /* default to using server inode numbers where available */
852 if (strncmp(options, "sep=", 4) == 0) {
853 if (options[4] != 0) {
854 separator[0] = options[4];
857 cFYI(1, "Null separator not allowed");
861 while ((data = strsep(&options, separator)) != NULL) {
864 if ((value = strchr(data, '=')) != NULL)
867 /* Have to parse this before we parse for "user" */
868 if (strnicmp(data, "user_xattr", 10) == 0) {
870 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
872 } else if (strnicmp(data, "user", 4) == 0) {
875 "CIFS: invalid or missing username\n");
876 return 1; /* needs_arg; */
877 } else if (!*value) {
878 /* null user, ie anonymous, authentication */
881 if (strnlen(value, 200) < 200) {
882 vol->username = value;
884 printk(KERN_WARNING "CIFS: username too long\n");
887 } else if (strnicmp(data, "pass", 4) == 0) {
889 vol->password = NULL;
891 } else if (value[0] == 0) {
892 /* check if string begins with double comma
893 since that would mean the password really
894 does start with a comma, and would not
895 indicate an empty string */
896 if (value[1] != separator[0]) {
897 vol->password = NULL;
901 temp_len = strlen(value);
902 /* removed password length check, NTLM passwords
903 can be arbitrarily long */
905 /* if comma in password, the string will be
906 prematurely null terminated. Commas in password are
907 specified across the cifs mount interface by a double
908 comma ie ,, and a comma used as in other cases ie ','
909 as a parameter delimiter/separator is single and due
910 to the strsep above is temporarily zeroed. */
912 /* NB: password legally can have multiple commas and
913 the only illegal character in a password is null */
915 if ((value[temp_len] == 0) &&
916 (value[temp_len+1] == separator[0])) {
918 value[temp_len] = separator[0];
919 temp_len += 2; /* move after second comma */
920 while (value[temp_len] != 0) {
921 if (value[temp_len] == separator[0]) {
922 if (value[temp_len+1] ==
924 /* skip second comma */
927 /* single comma indicating start
934 if (value[temp_len] == 0) {
938 /* point option to start of next parm */
939 options = value + temp_len + 1;
941 /* go from value to value + temp_len condensing
942 double commas to singles. Note that this ends up
943 allocating a few bytes too many, which is ok */
944 vol->password = kzalloc(temp_len, GFP_KERNEL);
945 if (vol->password == NULL) {
946 printk(KERN_WARNING "CIFS: no memory "
950 for (i = 0, j = 0; i < temp_len; i++, j++) {
951 vol->password[j] = value[i];
952 if (value[i] == separator[0]
953 && value[i+1] == separator[0]) {
954 /* skip second comma */
958 vol->password[j] = 0;
960 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
961 if (vol->password == NULL) {
962 printk(KERN_WARNING "CIFS: no memory "
966 strcpy(vol->password, value);
968 } else if (!strnicmp(data, "ip", 2) ||
969 !strnicmp(data, "addr", 4)) {
970 if (!value || !*value) {
972 } else if (strnlen(value, INET6_ADDRSTRLEN) <
976 printk(KERN_WARNING "CIFS: ip address "
980 } else if (strnicmp(data, "sec", 3) == 0) {
981 if (!value || !*value) {
982 cERROR(1, "no security value specified");
984 } else if (strnicmp(value, "krb5i", 5) == 0) {
985 vol->secFlg |= CIFSSEC_MAY_KRB5 |
987 } else if (strnicmp(value, "krb5p", 5) == 0) {
988 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
990 cERROR(1, "Krb5 cifs privacy not supported");
992 } else if (strnicmp(value, "krb5", 4) == 0) {
993 vol->secFlg |= CIFSSEC_MAY_KRB5;
994 #ifdef CONFIG_CIFS_EXPERIMENTAL
995 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
996 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
998 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
999 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1001 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
1002 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
1004 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
1005 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1006 } else if (strnicmp(value, "ntlmi", 5) == 0) {
1007 vol->secFlg |= CIFSSEC_MAY_NTLM |
1009 } else if (strnicmp(value, "ntlm", 4) == 0) {
1010 /* ntlm is default so can be turned off too */
1011 vol->secFlg |= CIFSSEC_MAY_NTLM;
1012 } else if (strnicmp(value, "nontlm", 6) == 0) {
1013 /* BB is there a better way to do this? */
1014 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1015 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1016 } else if (strnicmp(value, "lanman", 6) == 0) {
1017 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1019 } else if (strnicmp(value, "none", 4) == 0) {
1022 cERROR(1, "bad security option: %s", value);
1025 } else if ((strnicmp(data, "unc", 3) == 0)
1026 || (strnicmp(data, "target", 6) == 0)
1027 || (strnicmp(data, "path", 4) == 0)) {
1028 if (!value || !*value) {
1029 printk(KERN_WARNING "CIFS: invalid path to "
1030 "network resource\n");
1031 return 1; /* needs_arg; */
1033 if ((temp_len = strnlen(value, 300)) < 300) {
1034 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1035 if (vol->UNC == NULL)
1037 strcpy(vol->UNC, value);
1038 if (strncmp(vol->UNC, "//", 2) == 0) {
1041 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1043 "CIFS: UNC Path does not begin "
1044 "with // or \\\\ \n");
1048 printk(KERN_WARNING "CIFS: UNC name too long\n");
1051 } else if ((strnicmp(data, "domain", 3) == 0)
1052 || (strnicmp(data, "workgroup", 5) == 0)) {
1053 if (!value || !*value) {
1054 printk(KERN_WARNING "CIFS: invalid domain name\n");
1055 return 1; /* needs_arg; */
1057 /* BB are there cases in which a comma can be valid in
1058 a domain name and need special handling? */
1059 if (strnlen(value, 256) < 256) {
1060 vol->domainname = value;
1061 cFYI(1, "Domain name set");
1063 printk(KERN_WARNING "CIFS: domain name too "
1067 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1068 if (!value || !*value) {
1070 "CIFS: invalid path prefix\n");
1071 return 1; /* needs_argument */
1073 if ((temp_len = strnlen(value, 1024)) < 1024) {
1074 if (value[0] != '/')
1075 temp_len++; /* missing leading slash */
1076 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1077 if (vol->prepath == NULL)
1079 if (value[0] != '/') {
1080 vol->prepath[0] = '/';
1081 strcpy(vol->prepath+1, value);
1083 strcpy(vol->prepath, value);
1084 cFYI(1, "prefix path %s", vol->prepath);
1086 printk(KERN_WARNING "CIFS: prefix too long\n");
1089 } else if (strnicmp(data, "iocharset", 9) == 0) {
1090 if (!value || !*value) {
1091 printk(KERN_WARNING "CIFS: invalid iocharset "
1093 return 1; /* needs_arg; */
1095 if (strnlen(value, 65) < 65) {
1096 if (strnicmp(value, "default", 7))
1097 vol->iocharset = value;
1098 /* if iocharset not set then load_nls_default
1099 is used by caller */
1100 cFYI(1, "iocharset set to %s", value);
1102 printk(KERN_WARNING "CIFS: iocharset name "
1106 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1107 vol->linux_uid = simple_strtoul(value, &value, 0);
1108 uid_specified = true;
1109 } else if (!strnicmp(data, "forceuid", 8)) {
1111 } else if (!strnicmp(data, "noforceuid", 10)) {
1113 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1114 vol->linux_gid = simple_strtoul(value, &value, 0);
1115 gid_specified = true;
1116 } else if (!strnicmp(data, "forcegid", 8)) {
1118 } else if (!strnicmp(data, "noforcegid", 10)) {
1120 } else if (strnicmp(data, "file_mode", 4) == 0) {
1121 if (value && *value) {
1123 simple_strtoul(value, &value, 0);
1125 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1126 if (value && *value) {
1128 simple_strtoul(value, &value, 0);
1130 } else if (strnicmp(data, "dirmode", 4) == 0) {
1131 if (value && *value) {
1133 simple_strtoul(value, &value, 0);
1135 } else if (strnicmp(data, "port", 4) == 0) {
1136 if (value && *value) {
1138 simple_strtoul(value, &value, 0);
1140 } else if (strnicmp(data, "rsize", 5) == 0) {
1141 if (value && *value) {
1143 simple_strtoul(value, &value, 0);
1145 } else if (strnicmp(data, "wsize", 5) == 0) {
1146 if (value && *value) {
1148 simple_strtoul(value, &value, 0);
1150 } else if (strnicmp(data, "sockopt", 5) == 0) {
1151 if (!value || !*value) {
1152 cERROR(1, "no socket option specified");
1154 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1155 vol->sockopt_tcp_nodelay = 1;
1157 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1158 if (!value || !*value || (*value == ' ')) {
1159 cFYI(1, "invalid (empty) netbiosname");
1161 memset(vol->source_rfc1001_name, 0x20, 15);
1162 for (i = 0; i < 15; i++) {
1163 /* BB are there cases in which a comma can be
1164 valid in this workstation netbios name (and need
1165 special handling)? */
1167 /* We do not uppercase netbiosname for user */
1171 vol->source_rfc1001_name[i] =
1174 /* The string has 16th byte zero still from
1175 set at top of the function */
1176 if ((i == 15) && (value[i] != 0))
1177 printk(KERN_WARNING "CIFS: netbiosname"
1178 " longer than 15 truncated.\n");
1180 } else if (strnicmp(data, "servern", 7) == 0) {
1181 /* servernetbiosname specified override *SMBSERVER */
1182 if (!value || !*value || (*value == ' ')) {
1183 cFYI(1, "empty server netbiosname specified");
1185 /* last byte, type, is 0x20 for servr type */
1186 memset(vol->target_rfc1001_name, 0x20, 16);
1188 for (i = 0; i < 15; i++) {
1189 /* BB are there cases in which a comma can be
1190 valid in this workstation netbios name
1191 (and need special handling)? */
1193 /* user or mount helper must uppercase
1198 vol->target_rfc1001_name[i] =
1201 /* The string has 16th byte zero still from
1202 set at top of the function */
1203 if ((i == 15) && (value[i] != 0))
1204 printk(KERN_WARNING "CIFS: server net"
1205 "biosname longer than 15 truncated.\n");
1207 } else if (strnicmp(data, "credentials", 4) == 0) {
1209 } else if (strnicmp(data, "version", 3) == 0) {
1211 } else if (strnicmp(data, "guest", 5) == 0) {
1213 } else if (strnicmp(data, "rw", 2) == 0) {
1215 } else if (strnicmp(data, "ro", 2) == 0) {
1217 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1218 vol->noblocksnd = 1;
1219 } else if (strnicmp(data, "noautotune", 10) == 0) {
1220 vol->noautotune = 1;
1221 } else if ((strnicmp(data, "suid", 4) == 0) ||
1222 (strnicmp(data, "nosuid", 6) == 0) ||
1223 (strnicmp(data, "exec", 4) == 0) ||
1224 (strnicmp(data, "noexec", 6) == 0) ||
1225 (strnicmp(data, "nodev", 5) == 0) ||
1226 (strnicmp(data, "noauto", 6) == 0) ||
1227 (strnicmp(data, "dev", 3) == 0)) {
1228 /* The mount tool or mount.cifs helper (if present)
1229 uses these opts to set flags, and the flags are read
1230 by the kernel vfs layer before we get here (ie
1231 before read super) so there is no point trying to
1232 parse these options again and set anything and it
1233 is ok to just ignore them */
1235 } else if (strnicmp(data, "hard", 4) == 0) {
1237 } else if (strnicmp(data, "soft", 4) == 0) {
1239 } else if (strnicmp(data, "perm", 4) == 0) {
1241 } else if (strnicmp(data, "noperm", 6) == 0) {
1243 } else if (strnicmp(data, "mapchars", 8) == 0) {
1245 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1247 } else if (strnicmp(data, "sfu", 3) == 0) {
1249 } else if (strnicmp(data, "nosfu", 5) == 0) {
1251 } else if (strnicmp(data, "nodfs", 5) == 0) {
1253 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1254 vol->posix_paths = 1;
1255 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1256 vol->posix_paths = 0;
1257 } else if (strnicmp(data, "nounix", 6) == 0) {
1258 vol->no_linux_ext = 1;
1259 } else if (strnicmp(data, "nolinux", 7) == 0) {
1260 vol->no_linux_ext = 1;
1261 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1262 (strnicmp(data, "ignorecase", 10) == 0)) {
1264 } else if (strnicmp(data, "mand", 4) == 0) {
1266 } else if (strnicmp(data, "nomand", 6) == 0) {
1268 } else if (strnicmp(data, "_netdev", 7) == 0) {
1270 } else if (strnicmp(data, "brl", 3) == 0) {
1272 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1273 (strnicmp(data, "nolock", 6) == 0)) {
1275 /* turn off mandatory locking in mode
1276 if remote locking is turned off since the
1277 local vfs will do advisory */
1278 if (vol->file_mode ==
1279 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1280 vol->file_mode = S_IALLUGO;
1281 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1282 /* will take the shorter form "forcemand" as well */
1283 /* This mount option will force use of mandatory
1284 (DOS/Windows style) byte range locks, instead of
1285 using posix advisory byte range locks, even if the
1286 Unix extensions are available and posix locks would
1287 be supported otherwise. If Unix extensions are not
1288 negotiated this has no effect since mandatory locks
1289 would be used (mandatory locks is all that those
1290 those servers support) */
1292 } else if (strnicmp(data, "setuids", 7) == 0) {
1294 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1296 } else if (strnicmp(data, "dynperm", 7) == 0) {
1297 vol->dynperm = true;
1298 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1299 vol->dynperm = false;
1300 } else if (strnicmp(data, "nohard", 6) == 0) {
1302 } else if (strnicmp(data, "nosoft", 6) == 0) {
1304 } else if (strnicmp(data, "nointr", 6) == 0) {
1306 } else if (strnicmp(data, "intr", 4) == 0) {
1308 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1309 vol->nostrictsync = 1;
1310 } else if (strnicmp(data, "strictsync", 10) == 0) {
1311 vol->nostrictsync = 0;
1312 } else if (strnicmp(data, "serverino", 7) == 0) {
1313 vol->server_ino = 1;
1314 } else if (strnicmp(data, "noserverino", 9) == 0) {
1315 vol->server_ino = 0;
1316 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1318 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1320 } else if (strnicmp(data, "acl", 3) == 0) {
1321 vol->no_psx_acl = 0;
1322 } else if (strnicmp(data, "noacl", 5) == 0) {
1323 vol->no_psx_acl = 1;
1324 #ifdef CONFIG_CIFS_EXPERIMENTAL
1325 } else if (strnicmp(data, "locallease", 6) == 0) {
1326 vol->local_lease = 1;
1328 } else if (strnicmp(data, "sign", 4) == 0) {
1329 vol->secFlg |= CIFSSEC_MUST_SIGN;
1330 } else if (strnicmp(data, "seal", 4) == 0) {
1331 /* we do not do the following in secFlags because seal
1332 is a per tree connection (mount) not a per socket
1333 or per-smb connection option in the protocol */
1334 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1336 } else if (strnicmp(data, "direct", 6) == 0) {
1338 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1340 } else if (strnicmp(data, "noac", 4) == 0) {
1341 printk(KERN_WARNING "CIFS: Mount option noac not "
1342 "supported. Instead set "
1343 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1344 } else if (strnicmp(data, "fsc", 3) == 0) {
1347 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1350 if (vol->UNC == NULL) {
1351 if (devname == NULL) {
1352 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1356 if ((temp_len = strnlen(devname, 300)) < 300) {
1357 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1358 if (vol->UNC == NULL)
1360 strcpy(vol->UNC, devname);
1361 if (strncmp(vol->UNC, "//", 2) == 0) {
1364 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1365 printk(KERN_WARNING "CIFS: UNC Path does not "
1366 "begin with // or \\\\ \n");
1369 value = strpbrk(vol->UNC+2, "/\\");
1373 printk(KERN_WARNING "CIFS: UNC name too long\n");
1377 if (vol->UNCip == NULL)
1378 vol->UNCip = &vol->UNC[2];
1381 vol->override_uid = override_uid;
1382 else if (override_uid == 1)
1383 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1384 "specified with no uid= option.\n");
1387 vol->override_gid = override_gid;
1388 else if (override_gid == 1)
1389 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1390 "specified with no gid= option.\n");
1396 match_address(struct TCP_Server_Info *server, struct sockaddr *addr)
1398 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1399 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1401 switch (addr->sa_family) {
1403 if (addr4->sin_addr.s_addr !=
1404 server->addr.sockAddr.sin_addr.s_addr)
1406 if (addr4->sin_port &&
1407 addr4->sin_port != server->addr.sockAddr.sin_port)
1411 if (!ipv6_addr_equal(&addr6->sin6_addr,
1412 &server->addr.sockAddr6.sin6_addr))
1414 if (addr6->sin6_scope_id !=
1415 server->addr.sockAddr6.sin6_scope_id)
1417 if (addr6->sin6_port &&
1418 addr6->sin6_port != server->addr.sockAddr6.sin6_port)
1427 match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1429 unsigned int secFlags;
1431 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1432 secFlags = vol->secFlg;
1434 secFlags = global_secflags | vol->secFlg;
1436 switch (server->secType) {
1438 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1442 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1446 if (!(secFlags & CIFSSEC_MAY_NTLM))
1450 if (!(secFlags & CIFSSEC_MAY_KRB5))
1454 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1458 /* shouldn't happen */
1462 /* now check if signing mode is acceptible */
1463 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
1464 (server->secMode & SECMODE_SIGN_REQUIRED))
1466 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
1468 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1474 static struct TCP_Server_Info *
1475 cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
1477 struct TCP_Server_Info *server;
1479 write_lock(&cifs_tcp_ses_lock);
1480 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
1482 * the demux thread can exit on its own while still in CifsNew
1483 * so don't accept any sockets in that state. Since the
1484 * tcpStatus never changes back to CifsNew it's safe to check
1485 * for this without a lock.
1487 if (server->tcpStatus == CifsNew)
1490 if (!match_address(server, addr))
1493 if (!match_security(server, vol))
1496 ++server->srv_count;
1497 write_unlock(&cifs_tcp_ses_lock);
1498 cFYI(1, "Existing tcp session with server found");
1501 write_unlock(&cifs_tcp_ses_lock);
1506 cifs_put_tcp_session(struct TCP_Server_Info *server)
1508 struct task_struct *task;
1510 write_lock(&cifs_tcp_ses_lock);
1511 if (--server->srv_count > 0) {
1512 write_unlock(&cifs_tcp_ses_lock);
1516 list_del_init(&server->tcp_ses_list);
1517 write_unlock(&cifs_tcp_ses_lock);
1519 spin_lock(&GlobalMid_Lock);
1520 server->tcpStatus = CifsExiting;
1521 spin_unlock(&GlobalMid_Lock);
1523 cifs_fscache_release_client_cookie(server);
1525 task = xchg(&server->tsk, NULL);
1527 force_sig(SIGKILL, task);
1530 static struct TCP_Server_Info *
1531 cifs_get_tcp_session(struct smb_vol *volume_info)
1533 struct TCP_Server_Info *tcp_ses = NULL;
1534 struct sockaddr_storage addr;
1535 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1536 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1539 memset(&addr, 0, sizeof(struct sockaddr_storage));
1541 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
1543 if (volume_info->UNCip && volume_info->UNC) {
1544 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
1546 strlen(volume_info->UNCip),
1549 /* we failed translating address */
1553 } else if (volume_info->UNCip) {
1554 /* BB using ip addr as tcp_ses name to connect to the
1556 cERROR(1, "Connecting to DFS root not implemented yet");
1559 } else /* which tcp_sess DFS root would we conect to */ {
1560 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1561 "unc=//192.168.1.100/public) specified");
1566 /* see if we already have a matching tcp_ses */
1567 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
1571 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1577 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1578 if (IS_ERR(tcp_ses->hostname)) {
1579 rc = PTR_ERR(tcp_ses->hostname);
1583 tcp_ses->noblocksnd = volume_info->noblocksnd;
1584 tcp_ses->noautotune = volume_info->noautotune;
1585 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
1586 atomic_set(&tcp_ses->inFlight, 0);
1587 init_waitqueue_head(&tcp_ses->response_q);
1588 init_waitqueue_head(&tcp_ses->request_q);
1589 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1590 mutex_init(&tcp_ses->srv_mutex);
1591 memcpy(tcp_ses->workstation_RFC1001_name,
1592 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1593 memcpy(tcp_ses->server_RFC1001_name,
1594 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1595 tcp_ses->sequence_number = 0;
1596 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1597 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1600 * at this point we are the only ones with the pointer
1601 * to the struct since the kernel thread not created yet
1602 * no need to spinlock this init of tcpStatus or srv_count
1604 tcp_ses->tcpStatus = CifsNew;
1605 ++tcp_ses->srv_count;
1607 if (addr.ss_family == AF_INET6) {
1608 cFYI(1, "attempting ipv6 connect");
1609 /* BB should we allow ipv6 on port 139? */
1610 /* other OS never observed in Wild doing 139 with v6 */
1611 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1612 sizeof(struct sockaddr_in6));
1613 rc = ipv6_connect(tcp_ses);
1615 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1616 sizeof(struct sockaddr_in));
1617 rc = ipv4_connect(tcp_ses);
1620 cERROR(1, "Error connecting to socket. Aborting operation");
1625 * since we're in a cifs function already, we know that
1626 * this will succeed. No need for try_module_get().
1628 __module_get(THIS_MODULE);
1629 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1631 if (IS_ERR(tcp_ses->tsk)) {
1632 rc = PTR_ERR(tcp_ses->tsk);
1633 cERROR(1, "error %d create cifsd thread", rc);
1634 module_put(THIS_MODULE);
1638 /* thread spawned, put it on the list */
1639 write_lock(&cifs_tcp_ses_lock);
1640 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1641 write_unlock(&cifs_tcp_ses_lock);
1643 cifs_fscache_get_client_cookie(tcp_ses);
1649 if (!IS_ERR(tcp_ses->hostname))
1650 kfree(tcp_ses->hostname);
1651 if (tcp_ses->ssocket)
1652 sock_release(tcp_ses->ssocket);
1658 static struct cifsSesInfo *
1659 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1661 struct cifsSesInfo *ses;
1663 write_lock(&cifs_tcp_ses_lock);
1664 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1665 switch (server->secType) {
1667 if (vol->cred_uid != ses->cred_uid)
1671 /* anything else takes username/password */
1672 if (strncmp(ses->userName, vol->username,
1675 if (strlen(vol->username) != 0 &&
1676 strncmp(ses->password, vol->password,
1681 write_unlock(&cifs_tcp_ses_lock);
1684 write_unlock(&cifs_tcp_ses_lock);
1689 cifs_put_smb_ses(struct cifsSesInfo *ses)
1692 struct TCP_Server_Info *server = ses->server;
1694 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
1695 write_lock(&cifs_tcp_ses_lock);
1696 if (--ses->ses_count > 0) {
1697 write_unlock(&cifs_tcp_ses_lock);
1701 list_del_init(&ses->smb_ses_list);
1702 write_unlock(&cifs_tcp_ses_lock);
1704 if (ses->status == CifsGood) {
1706 CIFSSMBLogoff(xid, ses);
1710 cifs_put_tcp_session(server);
1713 static struct cifsSesInfo *
1714 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1716 int rc = -ENOMEM, xid;
1717 struct cifsSesInfo *ses;
1721 ses = cifs_find_smb_ses(server, volume_info);
1723 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1725 /* existing SMB ses has a server reference already */
1726 cifs_put_tcp_session(server);
1728 mutex_lock(&ses->session_mutex);
1729 rc = cifs_negotiate_protocol(xid, ses);
1731 mutex_unlock(&ses->session_mutex);
1732 /* problem -- put our ses reference */
1733 cifs_put_smb_ses(ses);
1737 if (ses->need_reconnect) {
1738 cFYI(1, "Session needs reconnect");
1739 rc = cifs_setup_session(xid, ses,
1740 volume_info->local_nls);
1742 mutex_unlock(&ses->session_mutex);
1743 /* problem -- put our reference */
1744 cifs_put_smb_ses(ses);
1749 mutex_unlock(&ses->session_mutex);
1754 cFYI(1, "Existing smb sess not found");
1755 ses = sesInfoAlloc();
1759 /* new SMB session uses our server ref */
1760 ses->server = server;
1761 if (server->addr.sockAddr6.sin6_family == AF_INET6)
1762 sprintf(ses->serverName, "%pI6",
1763 &server->addr.sockAddr6.sin6_addr);
1765 sprintf(ses->serverName, "%pI4",
1766 &server->addr.sockAddr.sin_addr.s_addr);
1768 if (volume_info->username)
1769 strncpy(ses->userName, volume_info->username,
1772 /* volume_info->password freed at unmount */
1773 if (volume_info->password) {
1774 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
1778 if (volume_info->domainname) {
1779 int len = strlen(volume_info->domainname);
1780 ses->domainName = kmalloc(len + 1, GFP_KERNEL);
1781 if (ses->domainName)
1782 strcpy(ses->domainName, volume_info->domainname);
1784 ses->cred_uid = volume_info->cred_uid;
1785 ses->linux_uid = volume_info->linux_uid;
1786 ses->overrideSecFlg = volume_info->secFlg;
1788 mutex_lock(&ses->session_mutex);
1789 rc = cifs_negotiate_protocol(xid, ses);
1791 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
1792 mutex_unlock(&ses->session_mutex);
1796 /* success, put it on the list */
1797 write_lock(&cifs_tcp_ses_lock);
1798 list_add(&ses->smb_ses_list, &server->smb_ses_list);
1799 write_unlock(&cifs_tcp_ses_lock);
1810 static struct cifsTconInfo *
1811 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1813 struct list_head *tmp;
1814 struct cifsTconInfo *tcon;
1816 write_lock(&cifs_tcp_ses_lock);
1817 list_for_each(tmp, &ses->tcon_list) {
1818 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1819 if (tcon->tidStatus == CifsExiting)
1821 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1825 write_unlock(&cifs_tcp_ses_lock);
1828 write_unlock(&cifs_tcp_ses_lock);
1833 cifs_put_tcon(struct cifsTconInfo *tcon)
1836 struct cifsSesInfo *ses = tcon->ses;
1838 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
1839 write_lock(&cifs_tcp_ses_lock);
1840 if (--tcon->tc_count > 0) {
1841 write_unlock(&cifs_tcp_ses_lock);
1845 list_del_init(&tcon->tcon_list);
1846 write_unlock(&cifs_tcp_ses_lock);
1849 CIFSSMBTDis(xid, tcon);
1852 cifs_fscache_release_super_cookie(tcon);
1854 cifs_put_smb_ses(ses);
1857 static struct cifsTconInfo *
1858 cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
1861 struct cifsTconInfo *tcon;
1863 tcon = cifs_find_tcon(ses, volume_info->UNC);
1865 cFYI(1, "Found match on UNC path");
1866 /* existing tcon already has a reference */
1867 cifs_put_smb_ses(ses);
1868 if (tcon->seal != volume_info->seal)
1869 cERROR(1, "transport encryption setting "
1870 "conflicts with existing tid");
1874 tcon = tconInfoAlloc();
1881 if (volume_info->password) {
1882 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
1883 if (!tcon->password) {
1889 if (strchr(volume_info->UNC + 3, '\\') == NULL
1890 && strchr(volume_info->UNC + 3, '/') == NULL) {
1891 cERROR(1, "Missing share name");
1896 /* BB Do we need to wrap session_mutex around
1897 * this TCon call and Unix SetFS as
1898 * we do on SessSetup and reconnect? */
1900 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
1902 cFYI(1, "CIFS Tcon rc = %d", rc);
1906 if (volume_info->nodfs) {
1907 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
1908 cFYI(1, "DFS disabled (%d)", tcon->Flags);
1910 tcon->seal = volume_info->seal;
1911 /* we can have only one retry value for a connection
1912 to a share so for resources mounted more than once
1913 to the same server share the last value passed in
1914 for the retry flag is used */
1915 tcon->retry = volume_info->retry;
1916 tcon->nocase = volume_info->nocase;
1917 tcon->local_lease = volume_info->local_lease;
1919 write_lock(&cifs_tcp_ses_lock);
1920 list_add(&tcon->tcon_list, &ses->tcon_list);
1921 write_unlock(&cifs_tcp_ses_lock);
1923 cifs_fscache_get_super_cookie(tcon);
1934 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1935 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1936 struct dfs_info3_param **preferrals, int remap)
1941 *pnum_referrals = 0;
1944 if (pSesInfo->ipc_tid == 0) {
1945 temp_unc = kmalloc(2 /* for slashes */ +
1946 strnlen(pSesInfo->serverName,
1947 SERVER_NAME_LEN_WITH_NULL * 2)
1948 + 1 + 4 /* slash IPC$ */ + 2,
1950 if (temp_unc == NULL)
1954 strcpy(temp_unc + 2, pSesInfo->serverName);
1955 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1956 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1957 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
1961 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1962 pnum_referrals, nls_codepage, remap);
1963 /* BB map targetUNCs to dfs_info3 structures, here or
1964 in CIFSGetDFSRefer BB */
1969 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1970 static struct lock_class_key cifs_key[2];
1971 static struct lock_class_key cifs_slock_key[2];
1974 cifs_reclassify_socket4(struct socket *sock)
1976 struct sock *sk = sock->sk;
1977 BUG_ON(sock_owned_by_user(sk));
1978 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1979 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1983 cifs_reclassify_socket6(struct socket *sock)
1985 struct sock *sk = sock->sk;
1986 BUG_ON(sock_owned_by_user(sk));
1987 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1988 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1992 cifs_reclassify_socket4(struct socket *sock)
1997 cifs_reclassify_socket6(struct socket *sock)
2002 /* See RFC1001 section 14 on representation of Netbios names */
2003 static void rfc1002mangle(char *target, char *source, unsigned int length)
2007 for (i = 0, j = 0; i < (length); i++) {
2008 /* mask a nibble at a time and encode */
2009 target[j] = 'A' + (0x0F & (source[i] >> 4));
2010 target[j+1] = 'A' + (0x0F & source[i]);
2018 ipv4_connect(struct TCP_Server_Info *server)
2022 bool connected = false;
2023 __be16 orig_port = 0;
2024 struct socket *socket = server->ssocket;
2026 if (socket == NULL) {
2027 rc = sock_create_kern(PF_INET, SOCK_STREAM,
2028 IPPROTO_TCP, &socket);
2030 cERROR(1, "Error %d creating socket", rc);
2034 /* BB other socket options to set KEEPALIVE, NODELAY? */
2035 cFYI(1, "Socket created");
2036 server->ssocket = socket;
2037 socket->sk->sk_allocation = GFP_NOFS;
2038 cifs_reclassify_socket4(socket);
2041 /* user overrode default port */
2042 if (server->addr.sockAddr.sin_port) {
2043 rc = socket->ops->connect(socket, (struct sockaddr *)
2044 &server->addr.sockAddr,
2045 sizeof(struct sockaddr_in), 0);
2051 /* save original port so we can retry user specified port
2052 later if fall back ports fail this time */
2053 orig_port = server->addr.sockAddr.sin_port;
2055 /* do not retry on the same port we just failed on */
2056 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
2057 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
2058 rc = socket->ops->connect(socket,
2060 &server->addr.sockAddr,
2061 sizeof(struct sockaddr_in), 0);
2067 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
2068 rc = socket->ops->connect(socket, (struct sockaddr *)
2069 &server->addr.sockAddr,
2070 sizeof(struct sockaddr_in), 0);
2075 /* give up here - unless we want to retry on different
2076 protocol families some day */
2079 server->addr.sockAddr.sin_port = orig_port;
2080 cFYI(1, "Error %d connecting to server via ipv4", rc);
2081 sock_release(socket);
2082 server->ssocket = NULL;
2088 * Eventually check for other socket options to change from
2089 * the default. sock_setsockopt not used because it expects
2092 socket->sk->sk_rcvtimeo = 7 * HZ;
2093 socket->sk->sk_sndtimeo = 5 * HZ;
2095 /* make the bufsizes depend on wsize/rsize and max requests */
2096 if (server->noautotune) {
2097 if (socket->sk->sk_sndbuf < (200 * 1024))
2098 socket->sk->sk_sndbuf = 200 * 1024;
2099 if (socket->sk->sk_rcvbuf < (140 * 1024))
2100 socket->sk->sk_rcvbuf = 140 * 1024;
2103 if (server->tcp_nodelay) {
2105 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2106 (char *)&val, sizeof(val));
2108 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2111 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
2112 socket->sk->sk_sndbuf,
2113 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
2115 /* send RFC1001 sessinit */
2116 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
2117 /* some servers require RFC1001 sessinit before sending
2118 negprot - BB check reconnection in case where second
2119 sessinit is sent but no second negprot */
2120 struct rfc1002_session_packet *ses_init_buf;
2121 struct smb_hdr *smb_buf;
2122 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2125 ses_init_buf->trailer.session_req.called_len = 32;
2126 if (server->server_RFC1001_name &&
2127 server->server_RFC1001_name[0] != 0)
2128 rfc1002mangle(ses_init_buf->trailer.
2129 session_req.called_name,
2130 server->server_RFC1001_name,
2131 RFC1001_NAME_LEN_WITH_NULL);
2133 rfc1002mangle(ses_init_buf->trailer.
2134 session_req.called_name,
2135 DEFAULT_CIFS_CALLED_NAME,
2136 RFC1001_NAME_LEN_WITH_NULL);
2138 ses_init_buf->trailer.session_req.calling_len = 32;
2140 /* calling name ends in null (byte 16) from old smb
2142 if (server->workstation_RFC1001_name &&
2143 server->workstation_RFC1001_name[0] != 0)
2144 rfc1002mangle(ses_init_buf->trailer.
2145 session_req.calling_name,
2146 server->workstation_RFC1001_name,
2147 RFC1001_NAME_LEN_WITH_NULL);
2149 rfc1002mangle(ses_init_buf->trailer.
2150 session_req.calling_name,
2152 RFC1001_NAME_LEN_WITH_NULL);
2154 ses_init_buf->trailer.session_req.scope1 = 0;
2155 ses_init_buf->trailer.session_req.scope2 = 0;
2156 smb_buf = (struct smb_hdr *)ses_init_buf;
2157 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2158 smb_buf->smb_buf_length = 0x81000044;
2159 rc = smb_send(server, smb_buf, 0x44);
2160 kfree(ses_init_buf);
2161 msleep(1); /* RFC1001 layer in at least one server
2162 requires very short break before negprot
2163 presumably because not expecting negprot
2164 to follow so fast. This is a simple
2165 solution that works without
2166 complicating the code and causes no
2167 significant slowing down on mount
2168 for everyone else */
2170 /* else the negprot may still work without this
2171 even though malloc failed */
2179 ipv6_connect(struct TCP_Server_Info *server)
2183 bool connected = false;
2184 __be16 orig_port = 0;
2185 struct socket *socket = server->ssocket;
2187 if (socket == NULL) {
2188 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
2189 IPPROTO_TCP, &socket);
2191 cERROR(1, "Error %d creating ipv6 socket", rc);
2196 /* BB other socket options to set KEEPALIVE, NODELAY? */
2197 cFYI(1, "ipv6 Socket created");
2198 server->ssocket = socket;
2199 socket->sk->sk_allocation = GFP_NOFS;
2200 cifs_reclassify_socket6(socket);
2203 /* user overrode default port */
2204 if (server->addr.sockAddr6.sin6_port) {
2205 rc = socket->ops->connect(socket,
2206 (struct sockaddr *) &server->addr.sockAddr6,
2207 sizeof(struct sockaddr_in6), 0);
2213 /* save original port so we can retry user specified port
2214 later if fall back ports fail this time */
2216 orig_port = server->addr.sockAddr6.sin6_port;
2217 /* do not retry on the same port we just failed on */
2218 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
2219 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
2220 rc = socket->ops->connect(socket, (struct sockaddr *)
2221 &server->addr.sockAddr6,
2222 sizeof(struct sockaddr_in6), 0);
2228 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
2229 rc = socket->ops->connect(socket, (struct sockaddr *)
2230 &server->addr.sockAddr6,
2231 sizeof(struct sockaddr_in6), 0);
2236 /* give up here - unless we want to retry on different
2237 protocol families some day */
2240 server->addr.sockAddr6.sin6_port = orig_port;
2241 cFYI(1, "Error %d connecting to server via ipv6", rc);
2242 sock_release(socket);
2243 server->ssocket = NULL;
2248 * Eventually check for other socket options to change from
2249 * the default. sock_setsockopt not used because it expects
2252 socket->sk->sk_rcvtimeo = 7 * HZ;
2253 socket->sk->sk_sndtimeo = 5 * HZ;
2255 if (server->tcp_nodelay) {
2257 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2258 (char *)&val, sizeof(val));
2260 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2263 server->ssocket = socket;
2268 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2269 struct super_block *sb, struct smb_vol *vol_info)
2271 /* if we are reconnecting then should we check to see if
2272 * any requested capabilities changed locally e.g. via
2273 * remount but we can not do much about it here
2274 * if they have (even if we could detect it by the following)
2275 * Perhaps we could add a backpointer to array of sb from tcon
2276 * or if we change to make all sb to same share the same
2277 * sb as NFS - then we only have one backpointer to sb.
2278 * What if we wanted to mount the server share twice once with
2279 * and once without posixacls or posix paths? */
2280 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2282 if (vol_info && vol_info->no_linux_ext) {
2283 tcon->fsUnixInfo.Capability = 0;
2284 tcon->unix_ext = 0; /* Unix Extensions disabled */
2285 cFYI(1, "Linux protocol extensions disabled");
2287 } else if (vol_info)
2288 tcon->unix_ext = 1; /* Unix Extensions supported */
2290 if (tcon->unix_ext == 0) {
2291 cFYI(1, "Unix extensions disabled so not set on reconnect");
2295 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
2296 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2298 /* check for reconnect case in which we do not
2299 want to change the mount behavior if we can avoid it */
2300 if (vol_info == NULL) {
2301 /* turn off POSIX ACL and PATHNAMES if not set
2302 originally at mount time */
2303 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2304 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2305 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2306 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2307 cERROR(1, "POSIXPATH support change");
2308 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2309 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2310 cERROR(1, "possible reconnect error");
2311 cERROR(1, "server disabled POSIX path support");
2315 cap &= CIFS_UNIX_CAP_MASK;
2316 if (vol_info && vol_info->no_psx_acl)
2317 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2318 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2319 cFYI(1, "negotiated posix acl support");
2321 sb->s_flags |= MS_POSIXACL;
2324 if (vol_info && vol_info->posix_paths == 0)
2325 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2326 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2327 cFYI(1, "negotiate posix pathnames");
2329 CIFS_SB(sb)->mnt_cifs_flags |=
2330 CIFS_MOUNT_POSIX_PATHS;
2333 /* We might be setting the path sep back to a different
2334 form if we are reconnecting and the server switched its
2335 posix path capability for this share */
2336 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2337 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2339 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2340 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2341 CIFS_SB(sb)->rsize = 127 * 1024;
2342 cFYI(DBG2, "larger reads not supported by srv");
2347 cFYI(1, "Negotiate caps 0x%x", (int)cap);
2348 #ifdef CONFIG_CIFS_DEBUG2
2349 if (cap & CIFS_UNIX_FCNTL_CAP)
2350 cFYI(1, "FCNTL cap");
2351 if (cap & CIFS_UNIX_EXTATTR_CAP)
2352 cFYI(1, "EXTATTR cap");
2353 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2354 cFYI(1, "POSIX path cap");
2355 if (cap & CIFS_UNIX_XATTR_CAP)
2356 cFYI(1, "XATTR cap");
2357 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2358 cFYI(1, "POSIX ACL cap");
2359 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2360 cFYI(1, "very large read cap");
2361 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2362 cFYI(1, "very large write cap");
2363 #endif /* CIFS_DEBUG2 */
2364 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2365 if (vol_info == NULL) {
2366 cFYI(1, "resetting capabilities failed");
2368 cERROR(1, "Negotiating Unix capabilities "
2369 "with the server failed. Consider "
2370 "mounting with the Unix Extensions\n"
2371 "disabled, if problems are found, "
2372 "by specifying the nounix mount "
2380 convert_delimiter(char *path, char delim)
2393 for (i = 0; path[i] != '\0'; i++) {
2394 if (path[i] == old_delim)
2399 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2400 struct cifs_sb_info *cifs_sb)
2402 if (pvolume_info->rsize > CIFSMaxBufSize) {
2403 cERROR(1, "rsize %d too large, using MaxBufSize",
2404 pvolume_info->rsize);
2405 cifs_sb->rsize = CIFSMaxBufSize;
2406 } else if ((pvolume_info->rsize) &&
2407 (pvolume_info->rsize <= CIFSMaxBufSize))
2408 cifs_sb->rsize = pvolume_info->rsize;
2410 cifs_sb->rsize = CIFSMaxBufSize;
2412 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2413 cERROR(1, "wsize %d too large, using 4096 instead",
2414 pvolume_info->wsize);
2415 cifs_sb->wsize = 4096;
2416 } else if (pvolume_info->wsize)
2417 cifs_sb->wsize = pvolume_info->wsize;
2419 cifs_sb->wsize = min_t(const int,
2420 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2422 /* old default of CIFSMaxBufSize was too small now
2423 that SMB Write2 can send multiple pages in kvec.
2424 RFC1001 does not describe what happens when frame
2425 bigger than 128K is sent so use that as max in
2426 conjunction with 52K kvec constraint on arch with 4K
2429 if (cifs_sb->rsize < 2048) {
2430 cifs_sb->rsize = 2048;
2431 /* Windows ME may prefer this */
2432 cFYI(1, "readsize set to minimum: 2048");
2434 /* calculate prepath */
2435 cifs_sb->prepath = pvolume_info->prepath;
2436 if (cifs_sb->prepath) {
2437 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2438 /* we can not convert the / to \ in the path
2439 separators in the prefixpath yet because we do not
2440 know (until reset_cifs_unix_caps is called later)
2441 whether POSIX PATH CAP is available. We normalize
2442 the / to \ after reset_cifs_unix_caps is called */
2443 pvolume_info->prepath = NULL;
2445 cifs_sb->prepathlen = 0;
2446 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2447 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2448 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2449 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2450 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2451 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
2453 if (pvolume_info->noperm)
2454 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2455 if (pvolume_info->setuids)
2456 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2457 if (pvolume_info->server_ino)
2458 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2459 if (pvolume_info->remap)
2460 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2461 if (pvolume_info->no_xattr)
2462 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2463 if (pvolume_info->sfu_emul)
2464 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2465 if (pvolume_info->nobrl)
2466 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2467 if (pvolume_info->nostrictsync)
2468 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
2469 if (pvolume_info->mand_lock)
2470 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2471 if (pvolume_info->cifs_acl)
2472 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2473 if (pvolume_info->override_uid)
2474 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2475 if (pvolume_info->override_gid)
2476 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2477 if (pvolume_info->dynperm)
2478 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2479 if (pvolume_info->fsc)
2480 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
2481 if (pvolume_info->direct_io) {
2482 cFYI(1, "mounting share using direct i/o");
2483 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2486 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2487 cERROR(1, "mount option dynperm ignored if cifsacl "
2488 "mount option supported");
2492 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2493 struct cifs_sb_info *cifs_sb, const char *full_path)
2496 FILE_ALL_INFO *pfile_info;
2498 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2499 if (pfile_info == NULL)
2502 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2503 0 /* not legacy */, cifs_sb->local_nls,
2504 cifs_sb->mnt_cifs_flags &
2505 CIFS_MOUNT_MAP_SPECIAL_CHR);
2511 cleanup_volume_info(struct smb_vol **pvolume_info)
2513 struct smb_vol *volume_info;
2515 if (!pvolume_info || !*pvolume_info)
2518 volume_info = *pvolume_info;
2519 kzfree(volume_info->password);
2520 kfree(volume_info->UNC);
2521 kfree(volume_info->prepath);
2523 *pvolume_info = NULL;
2527 #ifdef CONFIG_CIFS_DFS_UPCALL
2528 /* build_path_to_root returns full path to root when
2529 * we do not have an exiting connection (tcon) */
2531 build_unc_path_to_root(const struct smb_vol *volume_info,
2532 const struct cifs_sb_info *cifs_sb)
2536 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2537 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2538 if (full_path == NULL)
2539 return ERR_PTR(-ENOMEM);
2541 strncpy(full_path, volume_info->UNC, unc_len);
2542 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2544 for (i = 0; i < unc_len; i++) {
2545 if (full_path[i] == '\\')
2550 if (cifs_sb->prepathlen)
2551 strncpy(full_path + unc_len, cifs_sb->prepath,
2552 cifs_sb->prepathlen);
2554 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2560 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2561 char *mount_data_global, const char *devname)
2565 struct smb_vol *volume_info;
2566 struct cifsSesInfo *pSesInfo;
2567 struct cifsTconInfo *tcon;
2568 struct TCP_Server_Info *srvTcp;
2570 char *mount_data = mount_data_global;
2571 #ifdef CONFIG_CIFS_DFS_UPCALL
2572 struct dfs_info3_param *referrals = NULL;
2573 unsigned int num_referrals = 0;
2574 int referral_walks_count = 0;
2585 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2591 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2596 if (volume_info->nullauth) {
2597 cFYI(1, "null user");
2598 volume_info->username = "";
2599 } else if (volume_info->username) {
2600 /* BB fixme parse for domain name here */
2601 cFYI(1, "Username: %s", volume_info->username);
2603 cifserror("No username specified");
2604 /* In userspace mount helper we can get user name from alternate
2605 locations such as env variables and files on disk */
2610 /* this is needed for ASCII cp to Unicode converts */
2611 if (volume_info->iocharset == NULL) {
2612 /* load_nls_default cannot return null */
2613 volume_info->local_nls = load_nls_default();
2615 volume_info->local_nls = load_nls(volume_info->iocharset);
2616 if (volume_info->local_nls == NULL) {
2617 cERROR(1, "CIFS mount error: iocharset %s not found",
2618 volume_info->iocharset);
2623 cifs_sb->local_nls = volume_info->local_nls;
2625 /* get a reference to a tcp session */
2626 srvTcp = cifs_get_tcp_session(volume_info);
2627 if (IS_ERR(srvTcp)) {
2628 rc = PTR_ERR(srvTcp);
2632 /* get a reference to a SMB session */
2633 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
2634 if (IS_ERR(pSesInfo)) {
2635 rc = PTR_ERR(pSesInfo);
2637 goto mount_fail_check;
2640 setup_cifs_sb(volume_info, cifs_sb);
2641 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2642 sb->s_maxbytes = MAX_LFS_FILESIZE;
2644 sb->s_maxbytes = MAX_NON_LFS;
2646 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2647 sb->s_time_gran = 100;
2649 /* search for existing tcon to this server share */
2650 tcon = cifs_get_tcon(pSesInfo, volume_info);
2654 goto remote_path_check;
2657 cifs_sb->tcon = tcon;
2659 /* do not care if following two calls succeed - informational */
2661 CIFSSMBQFSDeviceInfo(xid, tcon);
2662 CIFSSMBQFSAttributeInfo(xid, tcon);
2665 /* tell server which Unix caps we support */
2666 if (tcon->ses->capabilities & CAP_UNIX)
2667 /* reset of caps checks mount to see if unix extensions
2668 disabled for just this mount */
2669 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2671 tcon->unix_ext = 0; /* server does not support them */
2673 /* convert forward to back slashes in prepath here if needed */
2674 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2675 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2677 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2678 cifs_sb->rsize = 1024 * 127;
2679 cFYI(DBG2, "no very large read support, rsize now 127K");
2681 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2682 cifs_sb->wsize = min(cifs_sb->wsize,
2683 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2684 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2685 cifs_sb->rsize = min(cifs_sb->rsize,
2686 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2689 /* check if a whole path (including prepath) is not remote */
2690 if (!rc && cifs_sb->prepathlen && tcon) {
2691 /* build_path_to_root works only when we have a valid tcon */
2692 full_path = cifs_build_path_to_root(cifs_sb);
2693 if (full_path == NULL) {
2695 goto mount_fail_check;
2697 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2698 if (rc != -EREMOTE) {
2700 goto mount_fail_check;
2705 /* get referral if needed */
2706 if (rc == -EREMOTE) {
2707 #ifdef CONFIG_CIFS_DFS_UPCALL
2708 if (referral_walks_count > MAX_NESTED_LINKS) {
2710 * BB: when we implement proper loop detection,
2711 * we will remove this check. But now we need it
2712 * to prevent an indefinite loop if 'DFS tree' is
2713 * misconfigured (i.e. has loops).
2716 goto mount_fail_check;
2718 /* convert forward to back slashes in prepath here if needed */
2719 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2720 convert_delimiter(cifs_sb->prepath,
2721 CIFS_DIR_SEP(cifs_sb));
2722 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2723 if (IS_ERR(full_path)) {
2724 rc = PTR_ERR(full_path);
2725 goto mount_fail_check;
2728 cFYI(1, "Getting referral for: %s", full_path);
2729 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2730 cifs_sb->local_nls, &num_referrals, &referrals,
2731 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2732 if (!rc && num_referrals > 0) {
2733 char *fake_devname = NULL;
2735 if (mount_data != mount_data_global)
2738 mount_data = cifs_compose_mount_options(
2739 cifs_sb->mountdata, full_path + 1,
2740 referrals, &fake_devname);
2742 free_dfs_info_array(referrals, num_referrals);
2743 kfree(fake_devname);
2746 if (IS_ERR(mount_data)) {
2747 rc = PTR_ERR(mount_data);
2749 goto mount_fail_check;
2753 cifs_put_tcon(tcon);
2755 cifs_put_smb_ses(pSesInfo);
2757 cleanup_volume_info(&volume_info);
2758 referral_walks_count++;
2760 goto try_mount_again;
2762 #else /* No DFS support, return error on mount */
2768 /* on error free sesinfo and tcon struct if needed */
2770 if (mount_data != mount_data_global)
2772 /* If find_unc succeeded then rc == 0 so we can not end */
2773 /* up accidently freeing someone elses tcon struct */
2775 cifs_put_tcon(tcon);
2777 cifs_put_smb_ses(pSesInfo);
2779 cifs_put_tcp_session(srvTcp);
2783 /* volume_info->password is freed above when existing session found
2784 (in which case it is not needed anymore) but when new sesion is created
2785 the password ptr is put in the new session structure (in which case the
2786 password will be freed at unmount time) */
2788 /* zero out password before freeing */
2789 cleanup_volume_info(&volume_info);
2795 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2796 const char *tree, struct cifsTconInfo *tcon,
2797 const struct nls_table *nls_codepage)
2799 struct smb_hdr *smb_buffer;
2800 struct smb_hdr *smb_buffer_response;
2803 unsigned char *bcc_ptr;
2805 int length, bytes_left;
2811 smb_buffer = cifs_buf_get();
2812 if (smb_buffer == NULL)
2815 smb_buffer_response = smb_buffer;
2817 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2818 NULL /*no tid */ , 4 /*wct */ );
2820 smb_buffer->Mid = GetNextMid(ses->server);
2821 smb_buffer->Uid = ses->Suid;
2822 pSMB = (TCONX_REQ *) smb_buffer;
2823 pSMBr = (TCONX_RSP *) smb_buffer_response;
2825 pSMB->AndXCommand = 0xFF;
2826 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
2827 bcc_ptr = &pSMB->Password[0];
2828 if ((ses->server->secMode) & SECMODE_USER) {
2829 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
2830 *bcc_ptr = 0; /* password is null byte */
2831 bcc_ptr++; /* skip password */
2832 /* already aligned so no need to do it below */
2834 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
2835 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2836 specified as required (when that support is added to
2837 the vfs in the future) as only NTLM or the much
2838 weaker LANMAN (which we do not send by default) is accepted
2839 by Samba (not sure whether other servers allow
2840 NTLMv2 password here) */
2841 #ifdef CONFIG_CIFS_WEAK_PW_HASH
2842 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
2843 (ses->server->secType == LANMAN))
2844 calc_lanman_hash(tcon->password, ses->server->cryptKey,
2845 ses->server->secMode &
2846 SECMODE_PW_ENCRYPT ? true : false,
2849 #endif /* CIFS_WEAK_PW_HASH */
2850 SMBNTencrypt(tcon->password, ses->server->cryptKey,
2853 bcc_ptr += CIFS_SESS_KEY_SIZE;
2854 if (ses->capabilities & CAP_UNICODE) {
2855 /* must align unicode strings */
2856 *bcc_ptr = 0; /* null byte password */
2861 if (ses->server->secMode &
2862 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2863 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2865 if (ses->capabilities & CAP_STATUS32) {
2866 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2868 if (ses->capabilities & CAP_DFS) {
2869 smb_buffer->Flags2 |= SMBFLG2_DFS;
2871 if (ses->capabilities & CAP_UNICODE) {
2872 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2874 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
2875 6 /* max utf8 char length in bytes */ *
2876 (/* server len*/ + 256 /* share len */), nls_codepage);
2877 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
2878 bcc_ptr += 2; /* skip trailing null */
2879 } else { /* ASCII */
2880 strcpy(bcc_ptr, tree);
2881 bcc_ptr += strlen(tree) + 1;
2883 strcpy(bcc_ptr, "?????");
2884 bcc_ptr += strlen("?????");
2886 count = bcc_ptr - &pSMB->Password[0];
2887 pSMB->hdr.smb_buf_length += count;
2888 pSMB->ByteCount = cpu_to_le16(count);
2890 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
2893 /* above now done in SendReceive */
2894 if ((rc == 0) && (tcon != NULL)) {
2897 tcon->tidStatus = CifsGood;
2898 tcon->need_reconnect = false;
2899 tcon->tid = smb_buffer_response->Tid;
2900 bcc_ptr = pByteArea(smb_buffer_response);
2901 bytes_left = BCC(smb_buffer_response);
2902 length = strnlen(bcc_ptr, bytes_left - 2);
2903 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
2909 /* skip service field (NB: this field is always ASCII) */
2911 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
2912 (bcc_ptr[2] == 'C')) {
2913 cFYI(1, "IPC connection");
2916 } else if (length == 2) {
2917 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
2918 /* the most common case */
2919 cFYI(1, "disk share connection");
2922 bcc_ptr += length + 1;
2923 bytes_left -= (length + 1);
2924 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
2926 /* mostly informational -- no need to fail on error here */
2927 kfree(tcon->nativeFileSystem);
2928 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
2929 bytes_left, is_unicode,
2932 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
2934 if ((smb_buffer_response->WordCount == 3) ||
2935 (smb_buffer_response->WordCount == 7))
2936 /* field is in same location */
2937 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
2940 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
2941 } else if ((rc == 0) && tcon == NULL) {
2942 /* all we need to save for IPC$ connection */
2943 ses->ipc_tid = smb_buffer_response->Tid;
2946 cifs_buf_release(smb_buffer);
2951 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
2957 cifs_put_tcon(cifs_sb->tcon);
2959 cifs_sb->tcon = NULL;
2960 tmp = cifs_sb->prepath;
2961 cifs_sb->prepathlen = 0;
2962 cifs_sb->prepath = NULL;
2968 int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses)
2971 struct TCP_Server_Info *server = ses->server;
2973 /* only send once per connect */
2974 if (server->maxBuf != 0)
2977 rc = CIFSSMBNegotiate(xid, ses);
2978 if (rc == -EAGAIN) {
2979 /* retry only once on 1st time connection */
2980 rc = CIFSSMBNegotiate(xid, ses);
2985 spin_lock(&GlobalMid_Lock);
2986 if (server->tcpStatus != CifsExiting)
2987 server->tcpStatus = CifsGood;
2990 spin_unlock(&GlobalMid_Lock);
2998 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses,
2999 struct nls_table *nls_info)
3002 struct TCP_Server_Info *server = ses->server;
3005 ses->capabilities = server->capabilities;
3006 if (linuxExtEnabled == 0)
3007 ses->capabilities &= (~CAP_UNIX);
3009 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3010 server->secMode, server->capabilities, server->timeAdj);
3012 rc = CIFS_SessSetup(xid, ses, nls_info);
3014 cERROR(1, "Send error in SessSetup = %d", rc);
3016 cFYI(1, "CIFS Session Established successfully");
3017 spin_lock(&GlobalMid_Lock);
3018 ses->status = CifsGood;
3019 ses->need_reconnect = false;
3020 spin_unlock(&GlobalMid_Lock);