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"
53 #define RFC1001_PORT 139
55 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
58 extern mempool_t *cifs_req_poolp;
66 char *iocharset; /* local code page for mapping to and from Unicode */
67 char source_rfc1001_name[16]; /* netbios name of client */
68 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
81 bool no_psx_acl:1; /* set if posix acl support should be disabled */
83 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
84 bool server_ino:1; /* use inode numbers from server ie UniqueId */
86 bool remap:1; /* set to remap seven reserved chars in filenames */
87 bool posix_paths:1; /* unset to not ask for posix pathnames. */
90 bool nullauth:1; /* attempt to authenticate with null user */
91 bool nocase:1; /* request case insensitive filenames */
92 bool nobrl:1; /* disable sending byte range locks to srv */
93 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
94 bool seal:1; /* request transport encryption on share */
95 bool nodfs:1; /* Do not request DFS, even if available */
96 bool local_lease:1; /* check leases only on local system, not remote */
99 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
102 bool sockopt_tcp_nodelay:1;
103 unsigned short int port;
105 struct nls_table *local_nls;
108 static int ipv4_connect(struct TCP_Server_Info *server);
109 static int ipv6_connect(struct TCP_Server_Info *server);
112 * cifs tcp session reconnection
114 * mark tcp session as reconnecting so temporarily locked
115 * mark all smb sessions as reconnecting for tcp session
116 * reconnect tcp session
117 * wake up waiters on reconnection? - (not needed currently)
120 cifs_reconnect(struct TCP_Server_Info *server)
123 struct list_head *tmp, *tmp2;
124 struct cifsSesInfo *ses;
125 struct cifsTconInfo *tcon;
126 struct mid_q_entry *mid_entry;
128 spin_lock(&GlobalMid_Lock);
129 if (server->tcpStatus == CifsExiting) {
130 /* the demux thread will exit normally
131 next time through the loop */
132 spin_unlock(&GlobalMid_Lock);
135 server->tcpStatus = CifsNeedReconnect;
136 spin_unlock(&GlobalMid_Lock);
139 cFYI(1, "Reconnecting tcp session");
141 /* before reconnecting the tcp session, mark the smb session (uid)
142 and the tid bad so they are not used until reconnected */
143 read_lock(&cifs_tcp_ses_lock);
144 list_for_each(tmp, &server->smb_ses_list) {
145 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
146 ses->need_reconnect = true;
148 list_for_each(tmp2, &ses->tcon_list) {
149 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
150 tcon->need_reconnect = true;
153 read_unlock(&cifs_tcp_ses_lock);
154 /* do not want to be sending data on a socket we are freeing */
155 mutex_lock(&server->srv_mutex);
156 if (server->ssocket) {
157 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
158 server->ssocket->flags);
159 kernel_sock_shutdown(server->ssocket, SHUT_WR);
160 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
161 server->ssocket->state,
162 server->ssocket->flags);
163 sock_release(server->ssocket);
164 server->ssocket = NULL;
167 spin_lock(&GlobalMid_Lock);
168 list_for_each(tmp, &server->pending_mid_q) {
169 mid_entry = list_entry(tmp, struct
172 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
173 /* Mark other intransit requests as needing
174 retry so we do not immediately mark the
175 session bad again (ie after we reconnect
176 below) as they timeout too */
177 mid_entry->midState = MID_RETRY_NEEDED;
180 spin_unlock(&GlobalMid_Lock);
181 mutex_unlock(&server->srv_mutex);
183 while ((server->tcpStatus != CifsExiting) &&
184 (server->tcpStatus != CifsGood)) {
186 if (server->addr.sockAddr6.sin6_family == AF_INET6)
187 rc = ipv6_connect(server);
189 rc = ipv4_connect(server);
191 cFYI(1, "reconnect error %d", rc);
194 atomic_inc(&tcpSesReconnectCount);
195 spin_lock(&GlobalMid_Lock);
196 if (server->tcpStatus != CifsExiting)
197 server->tcpStatus = CifsGood;
198 server->sequence_number = 0;
199 spin_unlock(&GlobalMid_Lock);
200 /* atomic_set(&server->inFlight,0);*/
201 wake_up(&server->response_q);
209 0 not a transact2, or all data present
210 >0 transact2 with that much data missing
211 -EINVAL = invalid transact2
214 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
216 struct smb_t2_rsp *pSMBt;
218 int data_in_this_rsp;
221 if (pSMB->Command != SMB_COM_TRANSACTION2)
224 /* check for plausible wct, bcc and t2 data and parm sizes */
225 /* check for parm and data offset going beyond end of smb */
226 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
227 cFYI(1, "invalid transact2 word count");
231 pSMBt = (struct smb_t2_rsp *)pSMB;
233 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
234 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
236 remaining = total_data_size - data_in_this_rsp;
240 else if (remaining < 0) {
241 cFYI(1, "total data %d smaller than data in frame %d",
242 total_data_size, data_in_this_rsp);
245 cFYI(1, "missing %d bytes from transact2, check next response",
247 if (total_data_size > maxBufSize) {
248 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
249 total_data_size, maxBufSize);
256 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
258 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
259 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
264 char *data_area_of_target;
265 char *data_area_of_buf2;
268 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
270 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
271 cFYI(1, "total data size of primary and secondary t2 differ");
274 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
276 remaining = total_data_size - total_in_buf;
281 if (remaining == 0) /* nothing to do, ignore */
284 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
285 if (remaining < total_in_buf2) {
286 cFYI(1, "transact2 2nd response contains too much data");
289 /* find end of first SMB data area */
290 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
291 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
292 /* validate target area */
294 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
295 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
297 data_area_of_target += total_in_buf;
299 /* copy second buffer into end of first buffer */
300 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
301 total_in_buf += total_in_buf2;
302 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
303 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
304 byte_count += total_in_buf2;
305 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
307 byte_count = pTargetSMB->smb_buf_length;
308 byte_count += total_in_buf2;
310 /* BB also add check that we are not beyond maximum buffer size */
312 pTargetSMB->smb_buf_length = byte_count;
314 if (remaining == total_in_buf2) {
315 cFYI(1, "found the last secondary response");
316 return 0; /* we are done */
317 } else /* more responses to go */
323 cifs_demultiplex_thread(struct TCP_Server_Info *server)
326 unsigned int pdu_length, total_read;
327 struct smb_hdr *smb_buffer = NULL;
328 struct smb_hdr *bigbuf = NULL;
329 struct smb_hdr *smallbuf = NULL;
330 struct msghdr smb_msg;
332 struct socket *csocket = server->ssocket;
333 struct list_head *tmp;
334 struct cifsSesInfo *ses;
335 struct task_struct *task_to_wake = NULL;
336 struct mid_q_entry *mid_entry;
338 bool isLargeBuf = false;
342 current->flags |= PF_MEMALLOC;
343 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
345 length = atomic_inc_return(&tcpSesAllocCount);
347 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
351 while (server->tcpStatus != CifsExiting) {
354 if (bigbuf == NULL) {
355 bigbuf = cifs_buf_get();
357 cERROR(1, "No memory for large SMB response");
359 /* retry will check if exiting */
362 } else if (isLargeBuf) {
363 /* we are reusing a dirty large buf, clear its start */
364 memset(bigbuf, 0, sizeof(struct smb_hdr));
367 if (smallbuf == NULL) {
368 smallbuf = cifs_small_buf_get();
370 cERROR(1, "No memory for SMB response");
372 /* retry will check if exiting */
375 /* beginning of smb buffer is cleared in our buf_get */
376 } else /* if existing small buf clear beginning */
377 memset(smallbuf, 0, sizeof(struct smb_hdr));
381 smb_buffer = smallbuf;
382 iov.iov_base = smb_buffer;
384 smb_msg.msg_control = NULL;
385 smb_msg.msg_controllen = 0;
386 pdu_length = 4; /* enough to get RFC1001 header */
389 kernel_recvmsg(csocket, &smb_msg,
390 &iov, 1, pdu_length, 0 /* BB other flags? */);
392 if (server->tcpStatus == CifsExiting) {
394 } else if (server->tcpStatus == CifsNeedReconnect) {
395 cFYI(1, "Reconnect after server stopped responding");
396 cifs_reconnect(server);
397 cFYI(1, "call to reconnect done");
398 csocket = server->ssocket;
400 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
401 msleep(1); /* minimum sleep to prevent looping
402 allowing socket to clear and app threads to set
403 tcpStatus CifsNeedReconnect if server hung */
404 if (pdu_length < 4) {
405 iov.iov_base = (4 - pdu_length) +
407 iov.iov_len = pdu_length;
408 smb_msg.msg_control = NULL;
409 smb_msg.msg_controllen = 0;
413 } else if (length <= 0) {
414 if (server->tcpStatus == CifsNew) {
415 cFYI(1, "tcp session abend after SMBnegprot");
416 /* some servers kill the TCP session rather than
417 returning an SMB negprot error, in which
418 case reconnecting here is not going to help,
419 and so simply return error to mount */
422 if (!try_to_freeze() && (length == -EINTR)) {
423 cFYI(1, "cifsd thread killed");
426 cFYI(1, "Reconnect after unexpected peek error %d",
428 cifs_reconnect(server);
429 csocket = server->ssocket;
430 wake_up(&server->response_q);
432 } else if (length < pdu_length) {
433 cFYI(1, "requested %d bytes but only got %d bytes",
435 pdu_length -= length;
440 /* The right amount was read from socket - 4 bytes */
441 /* so we can now interpret the length field */
443 /* the first byte big endian of the length field,
444 is actually not part of the length but the type
445 with the most common, zero, as regular data */
446 temp = *((char *) smb_buffer);
448 /* Note that FC 1001 length is big endian on the wire,
449 but we convert it here so it is always manipulated
450 as host byte order */
451 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
452 smb_buffer->smb_buf_length = pdu_length;
454 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
456 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
458 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
459 cFYI(1, "Good RFC 1002 session rsp");
461 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
462 /* we get this from Windows 98 instead of
463 an error on SMB negprot response */
464 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
466 if (server->tcpStatus == CifsNew) {
467 /* if nack on negprot (rather than
468 ret of smb negprot error) reconnecting
469 not going to help, ret error to mount */
472 /* give server a second to
473 clean up before reconnect attempt */
475 /* always try 445 first on reconnect
476 since we get NACK on some if we ever
477 connected to port 139 (the NACK is
478 since we do not begin with RFC1001
479 session initialize frame) */
480 server->addr.sockAddr.sin_port =
482 cifs_reconnect(server);
483 csocket = server->ssocket;
484 wake_up(&server->response_q);
487 } else if (temp != (char) 0) {
488 cERROR(1, "Unknown RFC 1002 frame");
489 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
491 cifs_reconnect(server);
492 csocket = server->ssocket;
496 /* else we have an SMB response */
497 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
498 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
499 cERROR(1, "Invalid size SMB length %d pdu_length %d",
500 length, pdu_length+4);
501 cifs_reconnect(server);
502 csocket = server->ssocket;
503 wake_up(&server->response_q);
510 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
512 memcpy(bigbuf, smallbuf, 4);
516 iov.iov_base = 4 + (char *)smb_buffer;
517 iov.iov_len = pdu_length;
518 for (total_read = 0; total_read < pdu_length;
519 total_read += length) {
520 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
521 pdu_length - total_read, 0);
522 if ((server->tcpStatus == CifsExiting) ||
523 (length == -EINTR)) {
527 } else if (server->tcpStatus == CifsNeedReconnect) {
528 cifs_reconnect(server);
529 csocket = server->ssocket;
530 /* Reconnect wakes up rspns q */
531 /* Now we will reread sock */
534 } else if ((length == -ERESTARTSYS) ||
535 (length == -EAGAIN)) {
536 msleep(1); /* minimum sleep to prevent looping,
537 allowing socket to clear and app
538 threads to set tcpStatus
539 CifsNeedReconnect if server hung*/
542 } else if (length <= 0) {
543 cERROR(1, "Received no data, expecting %d",
544 pdu_length - total_read);
545 cifs_reconnect(server);
546 csocket = server->ssocket;
553 else if (reconnect == 1)
556 length += 4; /* account for rfc1002 hdr */
559 dump_smb(smb_buffer, length);
560 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
561 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
567 spin_lock(&GlobalMid_Lock);
568 list_for_each(tmp, &server->pending_mid_q) {
569 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
571 if ((mid_entry->mid == smb_buffer->Mid) &&
572 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
573 (mid_entry->command == smb_buffer->Command)) {
574 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
575 /* We have a multipart transact2 resp */
577 if (mid_entry->resp_buf) {
578 /* merge response - fix up 1st*/
579 if (coalesce_t2(smb_buffer,
580 mid_entry->resp_buf)) {
581 mid_entry->multiRsp =
585 /* all parts received */
586 mid_entry->multiEnd =
592 cERROR(1, "1st trans2 resp needs bigbuf");
593 /* BB maybe we can fix this up, switch
594 to already allocated large buffer? */
596 /* Have first buffer */
597 mid_entry->resp_buf =
599 mid_entry->largeBuf =
606 mid_entry->resp_buf = smb_buffer;
607 mid_entry->largeBuf = isLargeBuf;
609 task_to_wake = mid_entry->tsk;
610 mid_entry->midState = MID_RESPONSE_RECEIVED;
611 #ifdef CONFIG_CIFS_STATS2
612 mid_entry->when_received = jiffies;
614 /* so we do not time out requests to server
615 which is still responding (since server could
616 be busy but not dead) */
617 server->lstrp = jiffies;
621 spin_unlock(&GlobalMid_Lock);
623 /* Was previous buf put in mpx struct for multi-rsp? */
625 /* smb buffer will be freed by user thread */
631 wake_up_process(task_to_wake);
632 } else if (!is_valid_oplock_break(smb_buffer, server) &&
634 cERROR(1, "No task to wake, unknown frame received! "
635 "NumMids %d", midCount.counter);
636 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
637 sizeof(struct smb_hdr));
638 #ifdef CONFIG_CIFS_DEBUG2
639 cifs_dump_detail(smb_buffer);
640 cifs_dump_mids(server);
641 #endif /* CIFS_DEBUG2 */
644 } /* end while !EXITING */
646 /* take it off the list, if it's not already */
647 write_lock(&cifs_tcp_ses_lock);
648 list_del_init(&server->tcp_ses_list);
649 write_unlock(&cifs_tcp_ses_lock);
651 spin_lock(&GlobalMid_Lock);
652 server->tcpStatus = CifsExiting;
653 spin_unlock(&GlobalMid_Lock);
654 wake_up_all(&server->response_q);
656 /* check if we have blocked requests that need to free */
657 /* Note that cifs_max_pending is normally 50, but
658 can be set at module install time to as little as two */
659 spin_lock(&GlobalMid_Lock);
660 if (atomic_read(&server->inFlight) >= cifs_max_pending)
661 atomic_set(&server->inFlight, cifs_max_pending - 1);
662 /* We do not want to set the max_pending too low or we
663 could end up with the counter going negative */
664 spin_unlock(&GlobalMid_Lock);
665 /* Although there should not be any requests blocked on
666 this queue it can not hurt to be paranoid and try to wake up requests
667 that may haven been blocked when more than 50 at time were on the wire
668 to the same server - they now will see the session is in exit state
669 and get out of SendReceive. */
670 wake_up_all(&server->request_q);
671 /* give those requests time to exit */
674 if (server->ssocket) {
675 sock_release(csocket);
676 server->ssocket = NULL;
678 /* buffer usuallly freed in free_mid - need to free it here on exit */
679 cifs_buf_release(bigbuf);
680 if (smallbuf) /* no sense logging a debug message if NULL */
681 cifs_small_buf_release(smallbuf);
684 * BB: we shouldn't have to do any of this. It shouldn't be
685 * possible to exit from the thread with active SMB sessions
687 read_lock(&cifs_tcp_ses_lock);
688 if (list_empty(&server->pending_mid_q)) {
689 /* loop through server session structures attached to this and
691 list_for_each(tmp, &server->smb_ses_list) {
692 ses = list_entry(tmp, struct cifsSesInfo,
694 ses->status = CifsExiting;
697 read_unlock(&cifs_tcp_ses_lock);
699 /* although we can not zero the server struct pointer yet,
700 since there are active requests which may depnd on them,
701 mark the corresponding SMB sessions as exiting too */
702 list_for_each(tmp, &server->smb_ses_list) {
703 ses = list_entry(tmp, struct cifsSesInfo,
705 ses->status = CifsExiting;
708 spin_lock(&GlobalMid_Lock);
709 list_for_each(tmp, &server->pending_mid_q) {
710 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
711 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
712 cFYI(1, "Clearing Mid 0x%x - waking up ",
714 task_to_wake = mid_entry->tsk;
716 wake_up_process(task_to_wake);
719 spin_unlock(&GlobalMid_Lock);
720 read_unlock(&cifs_tcp_ses_lock);
721 /* 1/8th of sec is more than enough time for them to exit */
725 if (!list_empty(&server->pending_mid_q)) {
726 /* mpx threads have not exited yet give them
727 at least the smb send timeout time for long ops */
728 /* due to delays on oplock break requests, we need
729 to wait at least 45 seconds before giving up
730 on a request getting a response and going ahead
732 cFYI(1, "Wait for exit from demultiplex thread");
734 /* if threads still have not exited they are probably never
735 coming home not much else we can do but free the memory */
738 /* last chance to mark ses pointers invalid
739 if there are any pointing to this (e.g
740 if a crazy root user tried to kill cifsd
741 kernel thread explicitly this might happen) */
742 /* BB: This shouldn't be necessary, see above */
743 read_lock(&cifs_tcp_ses_lock);
744 list_for_each(tmp, &server->smb_ses_list) {
745 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
748 read_unlock(&cifs_tcp_ses_lock);
750 kfree(server->hostname);
751 task_to_wake = xchg(&server->tsk, NULL);
754 length = atomic_dec_return(&tcpSesAllocCount);
756 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
759 /* if server->tsk was NULL then wait for a signal before exiting */
761 set_current_state(TASK_INTERRUPTIBLE);
762 while (!signal_pending(current)) {
764 set_current_state(TASK_INTERRUPTIBLE);
766 set_current_state(TASK_RUNNING);
769 module_put_and_exit(0);
772 /* extract the host portion of the UNC string */
774 extract_hostname(const char *unc)
780 /* skip double chars at beginning of string */
781 /* BB: check validity of these bytes? */
784 /* delimiter between hostname and sharename is always '\\' now */
785 delim = strchr(src, '\\');
787 return ERR_PTR(-EINVAL);
790 dst = kmalloc((len + 1), GFP_KERNEL);
792 return ERR_PTR(-ENOMEM);
794 memcpy(dst, src, len);
801 cifs_parse_mount_options(char *options, const char *devname,
806 unsigned int temp_len, i, j;
808 short int override_uid = -1;
809 short int override_gid = -1;
810 bool uid_specified = false;
811 bool gid_specified = false;
816 if (Local_System_Name[0] != 0)
817 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
819 char *nodename = utsname()->nodename;
820 int n = strnlen(nodename, 15);
821 memset(vol->source_rfc1001_name, 0x20, 15);
822 for (i = 0; i < n; i++) {
823 /* does not have to be perfect mapping since field is
824 informational, only used for servers that do not support
825 port 445 and it can be overridden at mount time */
826 vol->source_rfc1001_name[i] = toupper(nodename[i]);
829 vol->source_rfc1001_name[15] = 0;
830 /* null target name indicates to use *SMBSERVR default called name
831 if we end up sending RFC1001 session initialize */
832 vol->target_rfc1001_name[0] = 0;
833 vol->linux_uid = current_uid(); /* use current_euid() instead? */
834 vol->linux_gid = current_gid();
836 /* default to only allowing write access to owner of the mount */
837 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
839 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
840 /* default is always to request posix paths. */
841 vol->posix_paths = 1;
842 /* default to using server inode numbers where available */
848 if (strncmp(options, "sep=", 4) == 0) {
849 if (options[4] != 0) {
850 separator[0] = options[4];
853 cFYI(1, "Null separator not allowed");
857 while ((data = strsep(&options, separator)) != NULL) {
860 if ((value = strchr(data, '=')) != NULL)
863 /* Have to parse this before we parse for "user" */
864 if (strnicmp(data, "user_xattr", 10) == 0) {
866 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
868 } else if (strnicmp(data, "user", 4) == 0) {
871 "CIFS: invalid or missing username\n");
872 return 1; /* needs_arg; */
873 } else if (!*value) {
874 /* null user, ie anonymous, authentication */
877 if (strnlen(value, 200) < 200) {
878 vol->username = value;
880 printk(KERN_WARNING "CIFS: username too long\n");
883 } else if (strnicmp(data, "pass", 4) == 0) {
885 vol->password = NULL;
887 } else if (value[0] == 0) {
888 /* check if string begins with double comma
889 since that would mean the password really
890 does start with a comma, and would not
891 indicate an empty string */
892 if (value[1] != separator[0]) {
893 vol->password = NULL;
897 temp_len = strlen(value);
898 /* removed password length check, NTLM passwords
899 can be arbitrarily long */
901 /* if comma in password, the string will be
902 prematurely null terminated. Commas in password are
903 specified across the cifs mount interface by a double
904 comma ie ,, and a comma used as in other cases ie ','
905 as a parameter delimiter/separator is single and due
906 to the strsep above is temporarily zeroed. */
908 /* NB: password legally can have multiple commas and
909 the only illegal character in a password is null */
911 if ((value[temp_len] == 0) &&
912 (value[temp_len+1] == separator[0])) {
914 value[temp_len] = separator[0];
915 temp_len += 2; /* move after second comma */
916 while (value[temp_len] != 0) {
917 if (value[temp_len] == separator[0]) {
918 if (value[temp_len+1] ==
920 /* skip second comma */
923 /* single comma indicating start
930 if (value[temp_len] == 0) {
934 /* point option to start of next parm */
935 options = value + temp_len + 1;
937 /* go from value to value + temp_len condensing
938 double commas to singles. Note that this ends up
939 allocating a few bytes too many, which is ok */
940 vol->password = kzalloc(temp_len, GFP_KERNEL);
941 if (vol->password == NULL) {
942 printk(KERN_WARNING "CIFS: no memory "
946 for (i = 0, j = 0; i < temp_len; i++, j++) {
947 vol->password[j] = value[i];
948 if (value[i] == separator[0]
949 && value[i+1] == separator[0]) {
950 /* skip second comma */
954 vol->password[j] = 0;
956 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
957 if (vol->password == NULL) {
958 printk(KERN_WARNING "CIFS: no memory "
962 strcpy(vol->password, value);
964 } else if (!strnicmp(data, "ip", 2) ||
965 !strnicmp(data, "addr", 4)) {
966 if (!value || !*value) {
968 } else if (strnlen(value, INET6_ADDRSTRLEN) <
972 printk(KERN_WARNING "CIFS: ip address "
976 } else if (strnicmp(data, "sec", 3) == 0) {
977 if (!value || !*value) {
978 cERROR(1, "no security value specified");
980 } else if (strnicmp(value, "krb5i", 5) == 0) {
981 vol->secFlg |= CIFSSEC_MAY_KRB5 |
983 } else if (strnicmp(value, "krb5p", 5) == 0) {
984 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
986 cERROR(1, "Krb5 cifs privacy not supported");
988 } else if (strnicmp(value, "krb5", 4) == 0) {
989 vol->secFlg |= CIFSSEC_MAY_KRB5;
990 #ifdef CONFIG_CIFS_EXPERIMENTAL
991 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
992 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
994 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
995 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
997 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
998 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
1000 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
1001 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1002 } else if (strnicmp(value, "ntlmi", 5) == 0) {
1003 vol->secFlg |= CIFSSEC_MAY_NTLM |
1005 } else if (strnicmp(value, "ntlm", 4) == 0) {
1006 /* ntlm is default so can be turned off too */
1007 vol->secFlg |= CIFSSEC_MAY_NTLM;
1008 } else if (strnicmp(value, "nontlm", 6) == 0) {
1009 /* BB is there a better way to do this? */
1010 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1011 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1012 } else if (strnicmp(value, "lanman", 6) == 0) {
1013 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1015 } else if (strnicmp(value, "none", 4) == 0) {
1018 cERROR(1, "bad security option: %s", value);
1021 } else if ((strnicmp(data, "unc", 3) == 0)
1022 || (strnicmp(data, "target", 6) == 0)
1023 || (strnicmp(data, "path", 4) == 0)) {
1024 if (!value || !*value) {
1025 printk(KERN_WARNING "CIFS: invalid path to "
1026 "network resource\n");
1027 return 1; /* needs_arg; */
1029 if ((temp_len = strnlen(value, 300)) < 300) {
1030 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1031 if (vol->UNC == NULL)
1033 strcpy(vol->UNC, value);
1034 if (strncmp(vol->UNC, "//", 2) == 0) {
1037 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1039 "CIFS: UNC Path does not begin "
1040 "with // or \\\\ \n");
1044 printk(KERN_WARNING "CIFS: UNC name too long\n");
1047 } else if ((strnicmp(data, "domain", 3) == 0)
1048 || (strnicmp(data, "workgroup", 5) == 0)) {
1049 if (!value || !*value) {
1050 printk(KERN_WARNING "CIFS: invalid domain name\n");
1051 return 1; /* needs_arg; */
1053 /* BB are there cases in which a comma can be valid in
1054 a domain name and need special handling? */
1055 if (strnlen(value, 256) < 256) {
1056 vol->domainname = value;
1057 cFYI(1, "Domain name set");
1059 printk(KERN_WARNING "CIFS: domain name too "
1063 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1064 if (!value || !*value) {
1066 "CIFS: invalid path prefix\n");
1067 return 1; /* needs_argument */
1069 if ((temp_len = strnlen(value, 1024)) < 1024) {
1070 if (value[0] != '/')
1071 temp_len++; /* missing leading slash */
1072 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1073 if (vol->prepath == NULL)
1075 if (value[0] != '/') {
1076 vol->prepath[0] = '/';
1077 strcpy(vol->prepath+1, value);
1079 strcpy(vol->prepath, value);
1080 cFYI(1, "prefix path %s", vol->prepath);
1082 printk(KERN_WARNING "CIFS: prefix too long\n");
1085 } else if (strnicmp(data, "iocharset", 9) == 0) {
1086 if (!value || !*value) {
1087 printk(KERN_WARNING "CIFS: invalid iocharset "
1089 return 1; /* needs_arg; */
1091 if (strnlen(value, 65) < 65) {
1092 if (strnicmp(value, "default", 7))
1093 vol->iocharset = value;
1094 /* if iocharset not set then load_nls_default
1095 is used by caller */
1096 cFYI(1, "iocharset set to %s", value);
1098 printk(KERN_WARNING "CIFS: iocharset name "
1102 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1103 vol->linux_uid = simple_strtoul(value, &value, 0);
1104 uid_specified = true;
1105 } else if (!strnicmp(data, "forceuid", 8)) {
1107 } else if (!strnicmp(data, "noforceuid", 10)) {
1109 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1110 vol->linux_gid = simple_strtoul(value, &value, 0);
1111 gid_specified = true;
1112 } else if (!strnicmp(data, "forcegid", 8)) {
1114 } else if (!strnicmp(data, "noforcegid", 10)) {
1116 } else if (strnicmp(data, "file_mode", 4) == 0) {
1117 if (value && *value) {
1119 simple_strtoul(value, &value, 0);
1121 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1122 if (value && *value) {
1124 simple_strtoul(value, &value, 0);
1126 } else if (strnicmp(data, "dirmode", 4) == 0) {
1127 if (value && *value) {
1129 simple_strtoul(value, &value, 0);
1131 } else if (strnicmp(data, "port", 4) == 0) {
1132 if (value && *value) {
1134 simple_strtoul(value, &value, 0);
1136 } else if (strnicmp(data, "rsize", 5) == 0) {
1137 if (value && *value) {
1139 simple_strtoul(value, &value, 0);
1141 } else if (strnicmp(data, "wsize", 5) == 0) {
1142 if (value && *value) {
1144 simple_strtoul(value, &value, 0);
1146 } else if (strnicmp(data, "sockopt", 5) == 0) {
1147 if (!value || !*value) {
1148 cERROR(1, "no socket option specified");
1150 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1151 vol->sockopt_tcp_nodelay = 1;
1153 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1154 if (!value || !*value || (*value == ' ')) {
1155 cFYI(1, "invalid (empty) netbiosname");
1157 memset(vol->source_rfc1001_name, 0x20, 15);
1158 for (i = 0; i < 15; i++) {
1159 /* BB are there cases in which a comma can be
1160 valid in this workstation netbios name (and need
1161 special handling)? */
1163 /* We do not uppercase netbiosname for user */
1167 vol->source_rfc1001_name[i] =
1170 /* The string has 16th byte zero still from
1171 set at top of the function */
1172 if ((i == 15) && (value[i] != 0))
1173 printk(KERN_WARNING "CIFS: netbiosname"
1174 " longer than 15 truncated.\n");
1176 } else if (strnicmp(data, "servern", 7) == 0) {
1177 /* servernetbiosname specified override *SMBSERVER */
1178 if (!value || !*value || (*value == ' ')) {
1179 cFYI(1, "empty server netbiosname specified");
1181 /* last byte, type, is 0x20 for servr type */
1182 memset(vol->target_rfc1001_name, 0x20, 16);
1184 for (i = 0; i < 15; i++) {
1185 /* BB are there cases in which a comma can be
1186 valid in this workstation netbios name
1187 (and need special handling)? */
1189 /* user or mount helper must uppercase
1194 vol->target_rfc1001_name[i] =
1197 /* The string has 16th byte zero still from
1198 set at top of the function */
1199 if ((i == 15) && (value[i] != 0))
1200 printk(KERN_WARNING "CIFS: server net"
1201 "biosname longer than 15 truncated.\n");
1203 } else if (strnicmp(data, "credentials", 4) == 0) {
1205 } else if (strnicmp(data, "version", 3) == 0) {
1207 } else if (strnicmp(data, "guest", 5) == 0) {
1209 } else if (strnicmp(data, "rw", 2) == 0) {
1211 } else if (strnicmp(data, "ro", 2) == 0) {
1213 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1214 vol->noblocksnd = 1;
1215 } else if (strnicmp(data, "noautotune", 10) == 0) {
1216 vol->noautotune = 1;
1217 } else if ((strnicmp(data, "suid", 4) == 0) ||
1218 (strnicmp(data, "nosuid", 6) == 0) ||
1219 (strnicmp(data, "exec", 4) == 0) ||
1220 (strnicmp(data, "noexec", 6) == 0) ||
1221 (strnicmp(data, "nodev", 5) == 0) ||
1222 (strnicmp(data, "noauto", 6) == 0) ||
1223 (strnicmp(data, "dev", 3) == 0)) {
1224 /* The mount tool or mount.cifs helper (if present)
1225 uses these opts to set flags, and the flags are read
1226 by the kernel vfs layer before we get here (ie
1227 before read super) so there is no point trying to
1228 parse these options again and set anything and it
1229 is ok to just ignore them */
1231 } else if (strnicmp(data, "hard", 4) == 0) {
1233 } else if (strnicmp(data, "soft", 4) == 0) {
1235 } else if (strnicmp(data, "perm", 4) == 0) {
1237 } else if (strnicmp(data, "noperm", 6) == 0) {
1239 } else if (strnicmp(data, "mapchars", 8) == 0) {
1241 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1243 } else if (strnicmp(data, "sfu", 3) == 0) {
1245 } else if (strnicmp(data, "nosfu", 5) == 0) {
1247 } else if (strnicmp(data, "nodfs", 5) == 0) {
1249 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1250 vol->posix_paths = 1;
1251 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1252 vol->posix_paths = 0;
1253 } else if (strnicmp(data, "nounix", 6) == 0) {
1254 vol->no_linux_ext = 1;
1255 } else if (strnicmp(data, "nolinux", 7) == 0) {
1256 vol->no_linux_ext = 1;
1257 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1258 (strnicmp(data, "ignorecase", 10) == 0)) {
1260 } else if (strnicmp(data, "brl", 3) == 0) {
1262 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1263 (strnicmp(data, "nolock", 6) == 0)) {
1265 /* turn off mandatory locking in mode
1266 if remote locking is turned off since the
1267 local vfs will do advisory */
1268 if (vol->file_mode ==
1269 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1270 vol->file_mode = S_IALLUGO;
1271 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1272 /* will take the shorter form "forcemand" as well */
1273 /* This mount option will force use of mandatory
1274 (DOS/Windows style) byte range locks, instead of
1275 using posix advisory byte range locks, even if the
1276 Unix extensions are available and posix locks would
1277 be supported otherwise. If Unix extensions are not
1278 negotiated this has no effect since mandatory locks
1279 would be used (mandatory locks is all that those
1280 those servers support) */
1282 } else if (strnicmp(data, "setuids", 7) == 0) {
1284 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1286 } else if (strnicmp(data, "dynperm", 7) == 0) {
1287 vol->dynperm = true;
1288 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1289 vol->dynperm = false;
1290 } else if (strnicmp(data, "nohard", 6) == 0) {
1292 } else if (strnicmp(data, "nosoft", 6) == 0) {
1294 } else if (strnicmp(data, "nointr", 6) == 0) {
1296 } else if (strnicmp(data, "intr", 4) == 0) {
1298 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1299 vol->nostrictsync = 1;
1300 } else if (strnicmp(data, "strictsync", 10) == 0) {
1301 vol->nostrictsync = 0;
1302 } else if (strnicmp(data, "serverino", 7) == 0) {
1303 vol->server_ino = 1;
1304 } else if (strnicmp(data, "noserverino", 9) == 0) {
1305 vol->server_ino = 0;
1306 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1308 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1310 } else if (strnicmp(data, "acl", 3) == 0) {
1311 vol->no_psx_acl = 0;
1312 } else if (strnicmp(data, "noacl", 5) == 0) {
1313 vol->no_psx_acl = 1;
1314 #ifdef CONFIG_CIFS_EXPERIMENTAL
1315 } else if (strnicmp(data, "locallease", 6) == 0) {
1316 vol->local_lease = 1;
1318 } else if (strnicmp(data, "sign", 4) == 0) {
1319 vol->secFlg |= CIFSSEC_MUST_SIGN;
1320 } else if (strnicmp(data, "seal", 4) == 0) {
1321 /* we do not do the following in secFlags because seal
1322 is a per tree connection (mount) not a per socket
1323 or per-smb connection option in the protocol */
1324 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1326 } else if (strnicmp(data, "direct", 6) == 0) {
1328 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1330 } else if (strnicmp(data, "noac", 4) == 0) {
1331 printk(KERN_WARNING "CIFS: Mount option noac not "
1332 "supported. Instead set "
1333 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1335 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1338 if (vol->UNC == NULL) {
1339 if (devname == NULL) {
1340 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1344 if ((temp_len = strnlen(devname, 300)) < 300) {
1345 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1346 if (vol->UNC == NULL)
1348 strcpy(vol->UNC, devname);
1349 if (strncmp(vol->UNC, "//", 2) == 0) {
1352 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1353 printk(KERN_WARNING "CIFS: UNC Path does not "
1354 "begin with // or \\\\ \n");
1357 value = strpbrk(vol->UNC+2, "/\\");
1361 printk(KERN_WARNING "CIFS: UNC name too long\n");
1365 if (vol->UNCip == NULL)
1366 vol->UNCip = &vol->UNC[2];
1369 vol->override_uid = override_uid;
1370 else if (override_uid == 1)
1371 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1372 "specified with no uid= option.\n");
1375 vol->override_gid = override_gid;
1376 else if (override_gid == 1)
1377 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1378 "specified with no gid= option.\n");
1383 static struct TCP_Server_Info *
1384 cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port)
1386 struct list_head *tmp;
1387 struct TCP_Server_Info *server;
1388 struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1389 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1391 write_lock(&cifs_tcp_ses_lock);
1392 list_for_each(tmp, &cifs_tcp_ses_list) {
1393 server = list_entry(tmp, struct TCP_Server_Info,
1396 * the demux thread can exit on its own while still in CifsNew
1397 * so don't accept any sockets in that state. Since the
1398 * tcpStatus never changes back to CifsNew it's safe to check
1399 * for this without a lock.
1401 if (server->tcpStatus == CifsNew)
1404 switch (addr->ss_family) {
1406 if (addr4->sin_addr.s_addr ==
1407 server->addr.sockAddr.sin_addr.s_addr) {
1408 addr4->sin_port = htons(port);
1409 /* user overrode default port? */
1410 if (addr4->sin_port) {
1411 if (addr4->sin_port !=
1412 server->addr.sockAddr.sin_port)
1420 if (ipv6_addr_equal(&addr6->sin6_addr,
1421 &server->addr.sockAddr6.sin6_addr) &&
1422 (addr6->sin6_scope_id ==
1423 server->addr.sockAddr6.sin6_scope_id)) {
1424 addr6->sin6_port = htons(port);
1425 /* user overrode default port? */
1426 if (addr6->sin6_port) {
1427 if (addr6->sin6_port !=
1428 server->addr.sockAddr6.sin6_port)
1436 ++server->srv_count;
1437 write_unlock(&cifs_tcp_ses_lock);
1438 cFYI(1, "Existing tcp session with server found");
1441 write_unlock(&cifs_tcp_ses_lock);
1446 cifs_put_tcp_session(struct TCP_Server_Info *server)
1448 struct task_struct *task;
1450 write_lock(&cifs_tcp_ses_lock);
1451 if (--server->srv_count > 0) {
1452 write_unlock(&cifs_tcp_ses_lock);
1456 list_del_init(&server->tcp_ses_list);
1457 write_unlock(&cifs_tcp_ses_lock);
1459 spin_lock(&GlobalMid_Lock);
1460 server->tcpStatus = CifsExiting;
1461 spin_unlock(&GlobalMid_Lock);
1463 task = xchg(&server->tsk, NULL);
1465 force_sig(SIGKILL, task);
1468 static struct TCP_Server_Info *
1469 cifs_get_tcp_session(struct smb_vol *volume_info)
1471 struct TCP_Server_Info *tcp_ses = NULL;
1472 struct sockaddr_storage addr;
1473 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1474 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1477 memset(&addr, 0, sizeof(struct sockaddr_storage));
1479 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
1481 if (volume_info->UNCip && volume_info->UNC) {
1482 rc = cifs_convert_address(volume_info->UNCip, &addr);
1484 /* we failed translating address */
1488 } else if (volume_info->UNCip) {
1489 /* BB using ip addr as tcp_ses name to connect to the
1491 cERROR(1, "Connecting to DFS root not implemented yet");
1494 } else /* which tcp_sess DFS root would we conect to */ {
1495 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1496 "unc=//192.168.1.100/public) specified");
1501 /* see if we already have a matching tcp_ses */
1502 tcp_ses = cifs_find_tcp_session(&addr, volume_info->port);
1506 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1512 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1513 if (IS_ERR(tcp_ses->hostname)) {
1514 rc = PTR_ERR(tcp_ses->hostname);
1518 tcp_ses->noblocksnd = volume_info->noblocksnd;
1519 tcp_ses->noautotune = volume_info->noautotune;
1520 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
1521 atomic_set(&tcp_ses->inFlight, 0);
1522 init_waitqueue_head(&tcp_ses->response_q);
1523 init_waitqueue_head(&tcp_ses->request_q);
1524 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1525 mutex_init(&tcp_ses->srv_mutex);
1526 memcpy(tcp_ses->workstation_RFC1001_name,
1527 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1528 memcpy(tcp_ses->server_RFC1001_name,
1529 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1530 tcp_ses->sequence_number = 0;
1531 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1532 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1535 * at this point we are the only ones with the pointer
1536 * to the struct since the kernel thread not created yet
1537 * no need to spinlock this init of tcpStatus or srv_count
1539 tcp_ses->tcpStatus = CifsNew;
1540 ++tcp_ses->srv_count;
1542 if (addr.ss_family == AF_INET6) {
1543 cFYI(1, "attempting ipv6 connect");
1544 /* BB should we allow ipv6 on port 139? */
1545 /* other OS never observed in Wild doing 139 with v6 */
1546 sin_server6->sin6_port = htons(volume_info->port);
1547 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1548 sizeof(struct sockaddr_in6));
1549 rc = ipv6_connect(tcp_ses);
1551 sin_server->sin_port = htons(volume_info->port);
1552 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1553 sizeof(struct sockaddr_in));
1554 rc = ipv4_connect(tcp_ses);
1557 cERROR(1, "Error connecting to socket. Aborting operation");
1562 * since we're in a cifs function already, we know that
1563 * this will succeed. No need for try_module_get().
1565 __module_get(THIS_MODULE);
1566 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1568 if (IS_ERR(tcp_ses->tsk)) {
1569 rc = PTR_ERR(tcp_ses->tsk);
1570 cERROR(1, "error %d create cifsd thread", rc);
1571 module_put(THIS_MODULE);
1575 /* thread spawned, put it on the list */
1576 write_lock(&cifs_tcp_ses_lock);
1577 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1578 write_unlock(&cifs_tcp_ses_lock);
1584 if (!IS_ERR(tcp_ses->hostname))
1585 kfree(tcp_ses->hostname);
1586 if (tcp_ses->ssocket)
1587 sock_release(tcp_ses->ssocket);
1593 static struct cifsSesInfo *
1594 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1596 struct list_head *tmp;
1597 struct cifsSesInfo *ses;
1599 write_lock(&cifs_tcp_ses_lock);
1600 list_for_each(tmp, &server->smb_ses_list) {
1601 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1602 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1606 write_unlock(&cifs_tcp_ses_lock);
1609 write_unlock(&cifs_tcp_ses_lock);
1614 cifs_put_smb_ses(struct cifsSesInfo *ses)
1617 struct TCP_Server_Info *server = ses->server;
1619 write_lock(&cifs_tcp_ses_lock);
1620 if (--ses->ses_count > 0) {
1621 write_unlock(&cifs_tcp_ses_lock);
1625 list_del_init(&ses->smb_ses_list);
1626 write_unlock(&cifs_tcp_ses_lock);
1628 if (ses->status == CifsGood) {
1630 CIFSSMBLogoff(xid, ses);
1634 cifs_put_tcp_session(server);
1637 static struct cifsTconInfo *
1638 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1640 struct list_head *tmp;
1641 struct cifsTconInfo *tcon;
1643 write_lock(&cifs_tcp_ses_lock);
1644 list_for_each(tmp, &ses->tcon_list) {
1645 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1646 if (tcon->tidStatus == CifsExiting)
1648 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1652 write_unlock(&cifs_tcp_ses_lock);
1655 write_unlock(&cifs_tcp_ses_lock);
1660 cifs_put_tcon(struct cifsTconInfo *tcon)
1663 struct cifsSesInfo *ses = tcon->ses;
1665 write_lock(&cifs_tcp_ses_lock);
1666 if (--tcon->tc_count > 0) {
1667 write_unlock(&cifs_tcp_ses_lock);
1671 list_del_init(&tcon->tcon_list);
1672 write_unlock(&cifs_tcp_ses_lock);
1675 CIFSSMBTDis(xid, tcon);
1679 cifs_put_smb_ses(ses);
1683 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1684 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1685 struct dfs_info3_param **preferrals, int remap)
1690 *pnum_referrals = 0;
1693 if (pSesInfo->ipc_tid == 0) {
1694 temp_unc = kmalloc(2 /* for slashes */ +
1695 strnlen(pSesInfo->serverName,
1696 SERVER_NAME_LEN_WITH_NULL * 2)
1697 + 1 + 4 /* slash IPC$ */ + 2,
1699 if (temp_unc == NULL)
1703 strcpy(temp_unc + 2, pSesInfo->serverName);
1704 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1705 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1706 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
1710 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1711 pnum_referrals, nls_codepage, remap);
1712 /* BB map targetUNCs to dfs_info3 structures, here or
1713 in CIFSGetDFSRefer BB */
1718 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1719 static struct lock_class_key cifs_key[2];
1720 static struct lock_class_key cifs_slock_key[2];
1723 cifs_reclassify_socket4(struct socket *sock)
1725 struct sock *sk = sock->sk;
1726 BUG_ON(sock_owned_by_user(sk));
1727 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1728 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1732 cifs_reclassify_socket6(struct socket *sock)
1734 struct sock *sk = sock->sk;
1735 BUG_ON(sock_owned_by_user(sk));
1736 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1737 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1741 cifs_reclassify_socket4(struct socket *sock)
1746 cifs_reclassify_socket6(struct socket *sock)
1751 /* See RFC1001 section 14 on representation of Netbios names */
1752 static void rfc1002mangle(char *target, char *source, unsigned int length)
1756 for (i = 0, j = 0; i < (length); i++) {
1757 /* mask a nibble at a time and encode */
1758 target[j] = 'A' + (0x0F & (source[i] >> 4));
1759 target[j+1] = 'A' + (0x0F & source[i]);
1767 ipv4_connect(struct TCP_Server_Info *server)
1771 bool connected = false;
1772 __be16 orig_port = 0;
1773 struct socket *socket = server->ssocket;
1775 if (socket == NULL) {
1776 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1777 IPPROTO_TCP, &socket);
1779 cERROR(1, "Error %d creating socket", rc);
1783 /* BB other socket options to set KEEPALIVE, NODELAY? */
1784 cFYI(1, "Socket created");
1785 server->ssocket = socket;
1786 socket->sk->sk_allocation = GFP_NOFS;
1787 cifs_reclassify_socket4(socket);
1790 /* user overrode default port */
1791 if (server->addr.sockAddr.sin_port) {
1792 rc = socket->ops->connect(socket, (struct sockaddr *)
1793 &server->addr.sockAddr,
1794 sizeof(struct sockaddr_in), 0);
1800 /* save original port so we can retry user specified port
1801 later if fall back ports fail this time */
1802 orig_port = server->addr.sockAddr.sin_port;
1804 /* do not retry on the same port we just failed on */
1805 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1806 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1807 rc = socket->ops->connect(socket,
1809 &server->addr.sockAddr,
1810 sizeof(struct sockaddr_in), 0);
1816 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1817 rc = socket->ops->connect(socket, (struct sockaddr *)
1818 &server->addr.sockAddr,
1819 sizeof(struct sockaddr_in), 0);
1824 /* give up here - unless we want to retry on different
1825 protocol families some day */
1828 server->addr.sockAddr.sin_port = orig_port;
1829 cFYI(1, "Error %d connecting to server via ipv4", rc);
1830 sock_release(socket);
1831 server->ssocket = NULL;
1837 * Eventually check for other socket options to change from
1838 * the default. sock_setsockopt not used because it expects
1841 socket->sk->sk_rcvtimeo = 7 * HZ;
1842 socket->sk->sk_sndtimeo = 5 * HZ;
1844 /* make the bufsizes depend on wsize/rsize and max requests */
1845 if (server->noautotune) {
1846 if (socket->sk->sk_sndbuf < (200 * 1024))
1847 socket->sk->sk_sndbuf = 200 * 1024;
1848 if (socket->sk->sk_rcvbuf < (140 * 1024))
1849 socket->sk->sk_rcvbuf = 140 * 1024;
1852 if (server->tcp_nodelay) {
1854 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
1855 (char *)&val, sizeof(val));
1857 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
1860 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1861 socket->sk->sk_sndbuf,
1862 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
1864 /* send RFC1001 sessinit */
1865 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1866 /* some servers require RFC1001 sessinit before sending
1867 negprot - BB check reconnection in case where second
1868 sessinit is sent but no second negprot */
1869 struct rfc1002_session_packet *ses_init_buf;
1870 struct smb_hdr *smb_buf;
1871 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1874 ses_init_buf->trailer.session_req.called_len = 32;
1875 if (server->server_RFC1001_name &&
1876 server->server_RFC1001_name[0] != 0)
1877 rfc1002mangle(ses_init_buf->trailer.
1878 session_req.called_name,
1879 server->server_RFC1001_name,
1880 RFC1001_NAME_LEN_WITH_NULL);
1882 rfc1002mangle(ses_init_buf->trailer.
1883 session_req.called_name,
1884 DEFAULT_CIFS_CALLED_NAME,
1885 RFC1001_NAME_LEN_WITH_NULL);
1887 ses_init_buf->trailer.session_req.calling_len = 32;
1889 /* calling name ends in null (byte 16) from old smb
1891 if (server->workstation_RFC1001_name &&
1892 server->workstation_RFC1001_name[0] != 0)
1893 rfc1002mangle(ses_init_buf->trailer.
1894 session_req.calling_name,
1895 server->workstation_RFC1001_name,
1896 RFC1001_NAME_LEN_WITH_NULL);
1898 rfc1002mangle(ses_init_buf->trailer.
1899 session_req.calling_name,
1901 RFC1001_NAME_LEN_WITH_NULL);
1903 ses_init_buf->trailer.session_req.scope1 = 0;
1904 ses_init_buf->trailer.session_req.scope2 = 0;
1905 smb_buf = (struct smb_hdr *)ses_init_buf;
1906 /* sizeof RFC1002_SESSION_REQUEST with no scope */
1907 smb_buf->smb_buf_length = 0x81000044;
1908 rc = smb_send(server, smb_buf, 0x44);
1909 kfree(ses_init_buf);
1910 msleep(1); /* RFC1001 layer in at least one server
1911 requires very short break before negprot
1912 presumably because not expecting negprot
1913 to follow so fast. This is a simple
1914 solution that works without
1915 complicating the code and causes no
1916 significant slowing down on mount
1917 for everyone else */
1919 /* else the negprot may still work without this
1920 even though malloc failed */
1928 ipv6_connect(struct TCP_Server_Info *server)
1932 bool connected = false;
1933 __be16 orig_port = 0;
1934 struct socket *socket = server->ssocket;
1936 if (socket == NULL) {
1937 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1938 IPPROTO_TCP, &socket);
1940 cERROR(1, "Error %d creating ipv6 socket", rc);
1945 /* BB other socket options to set KEEPALIVE, NODELAY? */
1946 cFYI(1, "ipv6 Socket created");
1947 server->ssocket = socket;
1948 socket->sk->sk_allocation = GFP_NOFS;
1949 cifs_reclassify_socket6(socket);
1952 /* user overrode default port */
1953 if (server->addr.sockAddr6.sin6_port) {
1954 rc = socket->ops->connect(socket,
1955 (struct sockaddr *) &server->addr.sockAddr6,
1956 sizeof(struct sockaddr_in6), 0);
1962 /* save original port so we can retry user specified port
1963 later if fall back ports fail this time */
1965 orig_port = server->addr.sockAddr6.sin6_port;
1966 /* do not retry on the same port we just failed on */
1967 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1968 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1969 rc = socket->ops->connect(socket, (struct sockaddr *)
1970 &server->addr.sockAddr6,
1971 sizeof(struct sockaddr_in6), 0);
1977 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1978 rc = socket->ops->connect(socket, (struct sockaddr *)
1979 &server->addr.sockAddr6,
1980 sizeof(struct sockaddr_in6), 0);
1985 /* give up here - unless we want to retry on different
1986 protocol families some day */
1989 server->addr.sockAddr6.sin6_port = orig_port;
1990 cFYI(1, "Error %d connecting to server via ipv6", rc);
1991 sock_release(socket);
1992 server->ssocket = NULL;
1997 * Eventually check for other socket options to change from
1998 * the default. sock_setsockopt not used because it expects
2001 socket->sk->sk_rcvtimeo = 7 * HZ;
2002 socket->sk->sk_sndtimeo = 5 * HZ;
2004 if (server->tcp_nodelay) {
2006 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2007 (char *)&val, sizeof(val));
2009 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2012 server->ssocket = socket;
2017 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2018 struct super_block *sb, struct smb_vol *vol_info)
2020 /* if we are reconnecting then should we check to see if
2021 * any requested capabilities changed locally e.g. via
2022 * remount but we can not do much about it here
2023 * if they have (even if we could detect it by the following)
2024 * Perhaps we could add a backpointer to array of sb from tcon
2025 * or if we change to make all sb to same share the same
2026 * sb as NFS - then we only have one backpointer to sb.
2027 * What if we wanted to mount the server share twice once with
2028 * and once without posixacls or posix paths? */
2029 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2031 if (vol_info && vol_info->no_linux_ext) {
2032 tcon->fsUnixInfo.Capability = 0;
2033 tcon->unix_ext = 0; /* Unix Extensions disabled */
2034 cFYI(1, "Linux protocol extensions disabled");
2036 } else if (vol_info)
2037 tcon->unix_ext = 1; /* Unix Extensions supported */
2039 if (tcon->unix_ext == 0) {
2040 cFYI(1, "Unix extensions disabled so not set on reconnect");
2044 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
2045 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2047 /* check for reconnect case in which we do not
2048 want to change the mount behavior if we can avoid it */
2049 if (vol_info == NULL) {
2050 /* turn off POSIX ACL and PATHNAMES if not set
2051 originally at mount time */
2052 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2053 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2054 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2055 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2056 cERROR(1, "POSIXPATH support change");
2057 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2058 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2059 cERROR(1, "possible reconnect error");
2060 cERROR(1, "server disabled POSIX path support");
2064 cap &= CIFS_UNIX_CAP_MASK;
2065 if (vol_info && vol_info->no_psx_acl)
2066 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2067 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2068 cFYI(1, "negotiated posix acl support");
2070 sb->s_flags |= MS_POSIXACL;
2073 if (vol_info && vol_info->posix_paths == 0)
2074 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2075 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2076 cFYI(1, "negotiate posix pathnames");
2078 CIFS_SB(sb)->mnt_cifs_flags |=
2079 CIFS_MOUNT_POSIX_PATHS;
2082 /* We might be setting the path sep back to a different
2083 form if we are reconnecting and the server switched its
2084 posix path capability for this share */
2085 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2086 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2088 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2089 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2090 CIFS_SB(sb)->rsize = 127 * 1024;
2091 cFYI(DBG2, "larger reads not supported by srv");
2096 cFYI(1, "Negotiate caps 0x%x", (int)cap);
2097 #ifdef CONFIG_CIFS_DEBUG2
2098 if (cap & CIFS_UNIX_FCNTL_CAP)
2099 cFYI(1, "FCNTL cap");
2100 if (cap & CIFS_UNIX_EXTATTR_CAP)
2101 cFYI(1, "EXTATTR cap");
2102 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2103 cFYI(1, "POSIX path cap");
2104 if (cap & CIFS_UNIX_XATTR_CAP)
2105 cFYI(1, "XATTR cap");
2106 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2107 cFYI(1, "POSIX ACL cap");
2108 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2109 cFYI(1, "very large read cap");
2110 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2111 cFYI(1, "very large write cap");
2112 #endif /* CIFS_DEBUG2 */
2113 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2114 if (vol_info == NULL) {
2115 cFYI(1, "resetting capabilities failed");
2117 cERROR(1, "Negotiating Unix capabilities "
2118 "with the server failed. Consider "
2119 "mounting with the Unix Extensions\n"
2120 "disabled, if problems are found, "
2121 "by specifying the nounix mount "
2129 convert_delimiter(char *path, char delim)
2142 for (i = 0; path[i] != '\0'; i++) {
2143 if (path[i] == old_delim)
2148 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2149 struct cifs_sb_info *cifs_sb)
2151 if (pvolume_info->rsize > CIFSMaxBufSize) {
2152 cERROR(1, "rsize %d too large, using MaxBufSize",
2153 pvolume_info->rsize);
2154 cifs_sb->rsize = CIFSMaxBufSize;
2155 } else if ((pvolume_info->rsize) &&
2156 (pvolume_info->rsize <= CIFSMaxBufSize))
2157 cifs_sb->rsize = pvolume_info->rsize;
2159 cifs_sb->rsize = CIFSMaxBufSize;
2161 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2162 cERROR(1, "wsize %d too large, using 4096 instead",
2163 pvolume_info->wsize);
2164 cifs_sb->wsize = 4096;
2165 } else if (pvolume_info->wsize)
2166 cifs_sb->wsize = pvolume_info->wsize;
2168 cifs_sb->wsize = min_t(const int,
2169 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2171 /* old default of CIFSMaxBufSize was too small now
2172 that SMB Write2 can send multiple pages in kvec.
2173 RFC1001 does not describe what happens when frame
2174 bigger than 128K is sent so use that as max in
2175 conjunction with 52K kvec constraint on arch with 4K
2178 if (cifs_sb->rsize < 2048) {
2179 cifs_sb->rsize = 2048;
2180 /* Windows ME may prefer this */
2181 cFYI(1, "readsize set to minimum: 2048");
2183 /* calculate prepath */
2184 cifs_sb->prepath = pvolume_info->prepath;
2185 if (cifs_sb->prepath) {
2186 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2187 /* we can not convert the / to \ in the path
2188 separators in the prefixpath yet because we do not
2189 know (until reset_cifs_unix_caps is called later)
2190 whether POSIX PATH CAP is available. We normalize
2191 the / to \ after reset_cifs_unix_caps is called */
2192 pvolume_info->prepath = NULL;
2194 cifs_sb->prepathlen = 0;
2195 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2196 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2197 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2198 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2199 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2200 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
2202 if (pvolume_info->noperm)
2203 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2204 if (pvolume_info->setuids)
2205 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2206 if (pvolume_info->server_ino)
2207 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2208 if (pvolume_info->remap)
2209 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2210 if (pvolume_info->no_xattr)
2211 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2212 if (pvolume_info->sfu_emul)
2213 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2214 if (pvolume_info->nobrl)
2215 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2216 if (pvolume_info->nostrictsync)
2217 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
2218 if (pvolume_info->mand_lock)
2219 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2220 if (pvolume_info->cifs_acl)
2221 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2222 if (pvolume_info->override_uid)
2223 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2224 if (pvolume_info->override_gid)
2225 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2226 if (pvolume_info->dynperm)
2227 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2228 if (pvolume_info->direct_io) {
2229 cFYI(1, "mounting share using direct i/o");
2230 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2233 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2234 cERROR(1, "mount option dynperm ignored if cifsacl "
2235 "mount option supported");
2239 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2240 struct cifs_sb_info *cifs_sb, const char *full_path)
2243 FILE_ALL_INFO *pfile_info;
2245 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2246 if (pfile_info == NULL)
2249 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2250 0 /* not legacy */, cifs_sb->local_nls,
2251 cifs_sb->mnt_cifs_flags &
2252 CIFS_MOUNT_MAP_SPECIAL_CHR);
2258 cleanup_volume_info(struct smb_vol **pvolume_info)
2260 struct smb_vol *volume_info;
2262 if (!pvolume_info && !*pvolume_info)
2265 volume_info = *pvolume_info;
2266 kzfree(volume_info->password);
2267 kfree(volume_info->UNC);
2268 kfree(volume_info->prepath);
2270 *pvolume_info = NULL;
2274 #ifdef CONFIG_CIFS_DFS_UPCALL
2275 /* build_path_to_root returns full path to root when
2276 * we do not have an exiting connection (tcon) */
2278 build_unc_path_to_root(const struct smb_vol *volume_info,
2279 const struct cifs_sb_info *cifs_sb)
2283 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2284 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2285 if (full_path == NULL)
2286 return ERR_PTR(-ENOMEM);
2288 strncpy(full_path, volume_info->UNC, unc_len);
2289 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2291 for (i = 0; i < unc_len; i++) {
2292 if (full_path[i] == '\\')
2297 if (cifs_sb->prepathlen)
2298 strncpy(full_path + unc_len, cifs_sb->prepath,
2299 cifs_sb->prepathlen);
2301 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2307 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2308 char *mount_data_global, const char *devname)
2312 struct smb_vol *volume_info;
2313 struct cifsSesInfo *pSesInfo;
2314 struct cifsTconInfo *tcon;
2315 struct TCP_Server_Info *srvTcp;
2317 char *mount_data = mount_data_global;
2318 #ifdef CONFIG_CIFS_DFS_UPCALL
2319 struct dfs_info3_param *referrals = NULL;
2320 unsigned int num_referrals = 0;
2321 int referral_walks_count = 0;
2332 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2338 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2343 if (volume_info->nullauth) {
2344 cFYI(1, "null user");
2345 volume_info->username = "";
2346 } else if (volume_info->username) {
2347 /* BB fixme parse for domain name here */
2348 cFYI(1, "Username: %s", volume_info->username);
2350 cifserror("No username specified");
2351 /* In userspace mount helper we can get user name from alternate
2352 locations such as env variables and files on disk */
2357 /* this is needed for ASCII cp to Unicode converts */
2358 if (volume_info->iocharset == NULL) {
2359 /* load_nls_default cannot return null */
2360 volume_info->local_nls = load_nls_default();
2362 volume_info->local_nls = load_nls(volume_info->iocharset);
2363 if (volume_info->local_nls == NULL) {
2364 cERROR(1, "CIFS mount error: iocharset %s not found",
2365 volume_info->iocharset);
2370 cifs_sb->local_nls = volume_info->local_nls;
2372 /* get a reference to a tcp session */
2373 srvTcp = cifs_get_tcp_session(volume_info);
2374 if (IS_ERR(srvTcp)) {
2375 rc = PTR_ERR(srvTcp);
2379 pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2381 cFYI(1, "Existing smb sess found (status=%d)",
2384 * The existing SMB session already has a reference to srvTcp,
2385 * so we can put back the extra one we got before
2387 cifs_put_tcp_session(srvTcp);
2389 mutex_lock(&pSesInfo->session_mutex);
2390 if (pSesInfo->need_reconnect) {
2391 cFYI(1, "Session needs reconnect");
2392 rc = cifs_setup_session(xid, pSesInfo,
2393 cifs_sb->local_nls);
2395 mutex_unlock(&pSesInfo->session_mutex);
2397 cFYI(1, "Existing smb sess not found");
2398 pSesInfo = sesInfoAlloc();
2399 if (pSesInfo == NULL) {
2401 goto mount_fail_check;
2404 /* new SMB session uses our srvTcp ref */
2405 pSesInfo->server = srvTcp;
2406 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2407 sprintf(pSesInfo->serverName, "%pI6",
2408 &srvTcp->addr.sockAddr6.sin6_addr);
2410 sprintf(pSesInfo->serverName, "%pI4",
2411 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2413 write_lock(&cifs_tcp_ses_lock);
2414 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2415 write_unlock(&cifs_tcp_ses_lock);
2417 /* volume_info->password freed at unmount */
2418 if (volume_info->password) {
2419 pSesInfo->password = kstrdup(volume_info->password,
2421 if (!pSesInfo->password) {
2423 goto mount_fail_check;
2426 if (volume_info->username)
2427 strncpy(pSesInfo->userName, volume_info->username,
2429 if (volume_info->domainname) {
2430 int len = strlen(volume_info->domainname);
2431 pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2432 if (pSesInfo->domainName)
2433 strcpy(pSesInfo->domainName,
2434 volume_info->domainname);
2436 pSesInfo->linux_uid = volume_info->linux_uid;
2437 pSesInfo->overrideSecFlg = volume_info->secFlg;
2438 mutex_lock(&pSesInfo->session_mutex);
2440 /* BB FIXME need to pass vol->secFlgs BB */
2441 rc = cifs_setup_session(xid, pSesInfo,
2442 cifs_sb->local_nls);
2443 mutex_unlock(&pSesInfo->session_mutex);
2446 /* search for existing tcon to this server share */
2448 setup_cifs_sb(volume_info, cifs_sb);
2450 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2452 cFYI(1, "Found match on UNC path");
2453 /* existing tcon already has a reference */
2454 cifs_put_smb_ses(pSesInfo);
2455 if (tcon->seal != volume_info->seal)
2456 cERROR(1, "transport encryption setting "
2457 "conflicts with existing tid");
2459 tcon = tconInfoAlloc();
2462 goto mount_fail_check;
2465 tcon->ses = pSesInfo;
2466 if (volume_info->password) {
2467 tcon->password = kstrdup(volume_info->password,
2469 if (!tcon->password) {
2471 goto mount_fail_check;
2475 if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2476 && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2477 cERROR(1, "Missing share name");
2479 goto mount_fail_check;
2481 /* BB Do we need to wrap sesSem around
2482 * this TCon call and Unix SetFS as
2483 * we do on SessSetup and reconnect? */
2484 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2485 tcon, cifs_sb->local_nls);
2486 cFYI(1, "CIFS Tcon rc = %d", rc);
2487 if (volume_info->nodfs) {
2488 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2489 cFYI(1, "DFS disabled (%d)",
2494 goto remote_path_check;
2495 tcon->seal = volume_info->seal;
2496 write_lock(&cifs_tcp_ses_lock);
2497 list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2498 write_unlock(&cifs_tcp_ses_lock);
2501 /* we can have only one retry value for a connection
2502 to a share so for resources mounted more than once
2503 to the same server share the last value passed in
2504 for the retry flag is used */
2505 tcon->retry = volume_info->retry;
2506 tcon->nocase = volume_info->nocase;
2507 tcon->local_lease = volume_info->local_lease;
2510 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2511 sb->s_maxbytes = MAX_LFS_FILESIZE;
2513 sb->s_maxbytes = MAX_NON_LFS;
2516 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2517 sb->s_time_gran = 100;
2520 goto remote_path_check;
2522 cifs_sb->tcon = tcon;
2524 /* do not care if following two calls succeed - informational */
2526 CIFSSMBQFSDeviceInfo(xid, tcon);
2527 CIFSSMBQFSAttributeInfo(xid, tcon);
2530 /* tell server which Unix caps we support */
2531 if (tcon->ses->capabilities & CAP_UNIX)
2532 /* reset of caps checks mount to see if unix extensions
2533 disabled for just this mount */
2534 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2536 tcon->unix_ext = 0; /* server does not support them */
2538 /* convert forward to back slashes in prepath here if needed */
2539 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2540 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2542 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2543 cifs_sb->rsize = 1024 * 127;
2544 cFYI(DBG2, "no very large read support, rsize now 127K");
2546 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2547 cifs_sb->wsize = min(cifs_sb->wsize,
2548 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2549 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2550 cifs_sb->rsize = min(cifs_sb->rsize,
2551 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2554 /* check if a whole path (including prepath) is not remote */
2555 if (!rc && cifs_sb->prepathlen && tcon) {
2556 /* build_path_to_root works only when we have a valid tcon */
2557 full_path = cifs_build_path_to_root(cifs_sb);
2558 if (full_path == NULL) {
2560 goto mount_fail_check;
2562 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2563 if (rc != -EREMOTE) {
2565 goto mount_fail_check;
2570 /* get referral if needed */
2571 if (rc == -EREMOTE) {
2572 #ifdef CONFIG_CIFS_DFS_UPCALL
2573 if (referral_walks_count > MAX_NESTED_LINKS) {
2575 * BB: when we implement proper loop detection,
2576 * we will remove this check. But now we need it
2577 * to prevent an indefinite loop if 'DFS tree' is
2578 * misconfigured (i.e. has loops).
2581 goto mount_fail_check;
2583 /* convert forward to back slashes in prepath here if needed */
2584 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2585 convert_delimiter(cifs_sb->prepath,
2586 CIFS_DIR_SEP(cifs_sb));
2587 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2588 if (IS_ERR(full_path)) {
2589 rc = PTR_ERR(full_path);
2590 goto mount_fail_check;
2593 cFYI(1, "Getting referral for: %s", full_path);
2594 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2595 cifs_sb->local_nls, &num_referrals, &referrals,
2596 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2597 if (!rc && num_referrals > 0) {
2598 char *fake_devname = NULL;
2600 if (mount_data != mount_data_global)
2603 mount_data = cifs_compose_mount_options(
2604 cifs_sb->mountdata, full_path + 1,
2605 referrals, &fake_devname);
2607 free_dfs_info_array(referrals, num_referrals);
2608 kfree(fake_devname);
2611 if (IS_ERR(mount_data)) {
2612 rc = PTR_ERR(mount_data);
2614 goto mount_fail_check;
2618 cifs_put_tcon(tcon);
2620 cifs_put_smb_ses(pSesInfo);
2622 cleanup_volume_info(&volume_info);
2623 referral_walks_count++;
2625 goto try_mount_again;
2627 #else /* No DFS support, return error on mount */
2633 /* on error free sesinfo and tcon struct if needed */
2635 if (mount_data != mount_data_global)
2637 /* If find_unc succeeded then rc == 0 so we can not end */
2638 /* up accidently freeing someone elses tcon struct */
2640 cifs_put_tcon(tcon);
2642 cifs_put_smb_ses(pSesInfo);
2644 cifs_put_tcp_session(srvTcp);
2648 /* volume_info->password is freed above when existing session found
2649 (in which case it is not needed anymore) but when new sesion is created
2650 the password ptr is put in the new session structure (in which case the
2651 password will be freed at unmount time) */
2653 /* zero out password before freeing */
2654 cleanup_volume_info(&volume_info);
2660 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2661 const char *tree, struct cifsTconInfo *tcon,
2662 const struct nls_table *nls_codepage)
2664 struct smb_hdr *smb_buffer;
2665 struct smb_hdr *smb_buffer_response;
2668 unsigned char *bcc_ptr;
2670 int length, bytes_left;
2676 smb_buffer = cifs_buf_get();
2677 if (smb_buffer == NULL)
2680 smb_buffer_response = smb_buffer;
2682 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2683 NULL /*no tid */ , 4 /*wct */ );
2685 smb_buffer->Mid = GetNextMid(ses->server);
2686 smb_buffer->Uid = ses->Suid;
2687 pSMB = (TCONX_REQ *) smb_buffer;
2688 pSMBr = (TCONX_RSP *) smb_buffer_response;
2690 pSMB->AndXCommand = 0xFF;
2691 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
2692 bcc_ptr = &pSMB->Password[0];
2693 if ((ses->server->secMode) & SECMODE_USER) {
2694 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
2695 *bcc_ptr = 0; /* password is null byte */
2696 bcc_ptr++; /* skip password */
2697 /* already aligned so no need to do it below */
2699 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
2700 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2701 specified as required (when that support is added to
2702 the vfs in the future) as only NTLM or the much
2703 weaker LANMAN (which we do not send by default) is accepted
2704 by Samba (not sure whether other servers allow
2705 NTLMv2 password here) */
2706 #ifdef CONFIG_CIFS_WEAK_PW_HASH
2707 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
2708 (ses->server->secType == LANMAN))
2709 calc_lanman_hash(tcon->password, ses->server->cryptKey,
2710 ses->server->secMode &
2711 SECMODE_PW_ENCRYPT ? true : false,
2714 #endif /* CIFS_WEAK_PW_HASH */
2715 SMBNTencrypt(tcon->password, ses->server->cryptKey,
2718 bcc_ptr += CIFS_SESS_KEY_SIZE;
2719 if (ses->capabilities & CAP_UNICODE) {
2720 /* must align unicode strings */
2721 *bcc_ptr = 0; /* null byte password */
2726 if (ses->server->secMode &
2727 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2728 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2730 if (ses->capabilities & CAP_STATUS32) {
2731 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2733 if (ses->capabilities & CAP_DFS) {
2734 smb_buffer->Flags2 |= SMBFLG2_DFS;
2736 if (ses->capabilities & CAP_UNICODE) {
2737 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2739 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
2740 6 /* max utf8 char length in bytes */ *
2741 (/* server len*/ + 256 /* share len */), nls_codepage);
2742 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
2743 bcc_ptr += 2; /* skip trailing null */
2744 } else { /* ASCII */
2745 strcpy(bcc_ptr, tree);
2746 bcc_ptr += strlen(tree) + 1;
2748 strcpy(bcc_ptr, "?????");
2749 bcc_ptr += strlen("?????");
2751 count = bcc_ptr - &pSMB->Password[0];
2752 pSMB->hdr.smb_buf_length += count;
2753 pSMB->ByteCount = cpu_to_le16(count);
2755 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
2758 /* above now done in SendReceive */
2759 if ((rc == 0) && (tcon != NULL)) {
2762 tcon->tidStatus = CifsGood;
2763 tcon->need_reconnect = false;
2764 tcon->tid = smb_buffer_response->Tid;
2765 bcc_ptr = pByteArea(smb_buffer_response);
2766 bytes_left = BCC(smb_buffer_response);
2767 length = strnlen(bcc_ptr, bytes_left - 2);
2768 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
2774 /* skip service field (NB: this field is always ASCII) */
2776 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
2777 (bcc_ptr[2] == 'C')) {
2778 cFYI(1, "IPC connection");
2781 } else if (length == 2) {
2782 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
2783 /* the most common case */
2784 cFYI(1, "disk share connection");
2787 bcc_ptr += length + 1;
2788 bytes_left -= (length + 1);
2789 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
2791 /* mostly informational -- no need to fail on error here */
2792 kfree(tcon->nativeFileSystem);
2793 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
2794 bytes_left, is_unicode,
2797 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
2799 if ((smb_buffer_response->WordCount == 3) ||
2800 (smb_buffer_response->WordCount == 7))
2801 /* field is in same location */
2802 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
2805 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
2806 } else if ((rc == 0) && tcon == NULL) {
2807 /* all we need to save for IPC$ connection */
2808 ses->ipc_tid = smb_buffer_response->Tid;
2811 cifs_buf_release(smb_buffer);
2816 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
2822 cifs_put_tcon(cifs_sb->tcon);
2824 cifs_sb->tcon = NULL;
2825 tmp = cifs_sb->prepath;
2826 cifs_sb->prepathlen = 0;
2827 cifs_sb->prepath = NULL;
2833 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
2834 struct nls_table *nls_info)
2838 struct TCP_Server_Info *server = pSesInfo->server;
2840 /* what if server changes its buffer size after dropping the session? */
2841 if (server->maxBuf == 0) /* no need to send on reconnect */ {
2842 rc = CIFSSMBNegotiate(xid, pSesInfo);
2843 if (rc == -EAGAIN) {
2844 /* retry only once on 1st time connection */
2845 rc = CIFSSMBNegotiate(xid, pSesInfo);
2850 spin_lock(&GlobalMid_Lock);
2851 if (server->tcpStatus != CifsExiting)
2852 server->tcpStatus = CifsGood;
2855 spin_unlock(&GlobalMid_Lock);
2864 pSesInfo->flags = 0;
2865 pSesInfo->capabilities = server->capabilities;
2866 if (linuxExtEnabled == 0)
2867 pSesInfo->capabilities &= (~CAP_UNIX);
2869 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
2870 server->secMode, server->capabilities, server->timeAdj);
2872 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
2874 cERROR(1, "Send error in SessSetup = %d", rc);
2876 cFYI(1, "CIFS Session Established successfully");
2877 spin_lock(&GlobalMid_Lock);
2878 pSesInfo->status = CifsGood;
2879 pSesInfo->need_reconnect = false;
2880 spin_unlock(&GlobalMid_Lock);