1 // SPDX-License-Identifier: GPL-2.0
3 * SMB2 version specific operations
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
8 #include <linux/pagemap.h>
10 #include <linux/falloc.h>
11 #include <linux/scatterlist.h>
12 #include <linux/uuid.h>
13 #include <linux/sort.h>
14 #include <crypto/aead.h>
15 #include <linux/fiemap.h>
16 #include <uapi/linux/magic.h>
20 #include "smb2proto.h"
21 #include "cifsproto.h"
22 #include "cifs_debug.h"
23 #include "cifs_unicode.h"
24 #include "smb2status.h"
26 #include "cifs_ioctl.h"
27 #include "smbdirect.h"
29 #include "fs_context.h"
31 /* Change credits for different ops and return the total number of credits */
33 change_conf(struct TCP_Server_Info *server)
35 server->credits += server->echo_credits + server->oplock_credits;
36 server->oplock_credits = server->echo_credits = 0;
37 switch (server->credits) {
41 server->echoes = false;
42 server->oplocks = false;
45 server->echoes = true;
46 server->oplocks = false;
47 server->echo_credits = 1;
50 server->echoes = true;
52 server->oplocks = true;
53 server->oplock_credits = 1;
55 server->oplocks = false;
57 server->echo_credits = 1;
59 server->credits -= server->echo_credits + server->oplock_credits;
60 return server->credits + server->echo_credits + server->oplock_credits;
64 smb2_add_credits(struct TCP_Server_Info *server,
65 const struct cifs_credits *credits, const int optype)
68 int scredits, in_flight;
69 unsigned int add = credits->value;
70 unsigned int instance = credits->instance;
71 bool reconnect_detected = false;
72 bool reconnect_with_invalid_credits = false;
74 spin_lock(&server->req_lock);
75 val = server->ops->get_credits_field(server, optype);
77 /* eg found case where write overlapping reconnect messed up credits */
78 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
79 reconnect_with_invalid_credits = true;
81 if ((instance == 0) || (instance == server->reconnect_instance))
84 reconnect_detected = true;
87 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
88 pr_warn_once("server overflowed SMB3 credits\n");
91 if (server->in_flight == 0 &&
92 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
93 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
94 rc = change_conf(server);
96 * Sometimes server returns 0 credits on oplock break ack - we need to
97 * rebalance credits in this case.
99 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
101 if (server->credits > 1) {
103 server->oplock_credits++;
107 in_flight = server->in_flight;
108 spin_unlock(&server->req_lock);
109 wake_up(&server->request_q);
111 if (reconnect_detected) {
112 trace_smb3_reconnect_detected(server->CurrentMid,
113 server->conn_id, server->hostname, scredits, add, in_flight);
115 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
119 if (reconnect_with_invalid_credits) {
120 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
121 server->conn_id, server->hostname, scredits, add, in_flight);
122 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
123 optype, scredits, add);
126 spin_lock(&cifs_tcp_ses_lock);
127 if (server->tcpStatus == CifsNeedReconnect
128 || server->tcpStatus == CifsExiting) {
129 spin_unlock(&cifs_tcp_ses_lock);
132 spin_unlock(&cifs_tcp_ses_lock);
136 /* change_conf hasn't been executed */
139 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
142 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
145 cifs_dbg(FYI, "disabling oplocks\n");
148 /* change_conf rebalanced credits for different types */
152 trace_smb3_add_credits(server->CurrentMid,
153 server->conn_id, server->hostname, scredits, add, in_flight);
154 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
158 smb2_set_credits(struct TCP_Server_Info *server, const int val)
160 int scredits, in_flight;
162 spin_lock(&server->req_lock);
163 server->credits = val;
165 server->reconnect_instance++;
166 scredits = server->credits;
167 in_flight = server->in_flight;
168 spin_unlock(&server->req_lock);
170 trace_smb3_set_credits(server->CurrentMid,
171 server->conn_id, server->hostname, scredits, val, in_flight);
172 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
174 /* don't log while holding the lock */
176 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
180 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
184 return &server->echo_credits;
186 return &server->oplock_credits;
188 return &server->credits;
193 smb2_get_credits(struct mid_q_entry *mid)
195 return mid->credits_received;
199 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
200 unsigned int *num, struct cifs_credits *credits)
203 unsigned int scredits, in_flight;
205 spin_lock(&server->req_lock);
207 if (server->credits <= 0) {
208 spin_unlock(&server->req_lock);
209 cifs_num_waiters_inc(server);
210 rc = wait_event_killable(server->request_q,
211 has_credits(server, &server->credits, 1));
212 cifs_num_waiters_dec(server);
215 spin_lock(&server->req_lock);
217 spin_unlock(&server->req_lock);
218 spin_lock(&cifs_tcp_ses_lock);
219 if (server->tcpStatus == CifsExiting) {
220 spin_unlock(&cifs_tcp_ses_lock);
223 spin_unlock(&cifs_tcp_ses_lock);
225 spin_lock(&server->req_lock);
226 scredits = server->credits;
227 /* can deadlock with reopen */
229 *num = SMB2_MAX_BUFFER_SIZE;
231 credits->instance = 0;
235 /* leave some credits for reopen and other ops */
237 *num = min_t(unsigned int, size,
238 scredits * SMB2_MAX_BUFFER_SIZE);
241 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
242 credits->instance = server->reconnect_instance;
243 server->credits -= credits->value;
245 if (server->in_flight > server->max_in_flight)
246 server->max_in_flight = server->in_flight;
250 scredits = server->credits;
251 in_flight = server->in_flight;
252 spin_unlock(&server->req_lock);
254 trace_smb3_add_credits(server->CurrentMid,
255 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
256 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
257 __func__, credits->value, scredits);
263 smb2_adjust_credits(struct TCP_Server_Info *server,
264 struct cifs_credits *credits,
265 const unsigned int payload_size)
267 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
268 int scredits, in_flight;
270 if (!credits->value || credits->value == new_val)
273 if (credits->value < new_val) {
274 trace_smb3_too_many_credits(server->CurrentMid,
275 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
276 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
277 credits->value, new_val);
282 spin_lock(&server->req_lock);
284 if (server->reconnect_instance != credits->instance) {
285 scredits = server->credits;
286 in_flight = server->in_flight;
287 spin_unlock(&server->req_lock);
289 trace_smb3_reconnect_detected(server->CurrentMid,
290 server->conn_id, server->hostname, scredits,
291 credits->value - new_val, in_flight);
292 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
293 credits->value - new_val);
297 server->credits += credits->value - new_val;
298 scredits = server->credits;
299 in_flight = server->in_flight;
300 spin_unlock(&server->req_lock);
301 wake_up(&server->request_q);
303 trace_smb3_add_credits(server->CurrentMid,
304 server->conn_id, server->hostname, scredits,
305 credits->value - new_val, in_flight);
306 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
307 __func__, credits->value - new_val, scredits);
309 credits->value = new_val;
315 smb2_get_next_mid(struct TCP_Server_Info *server)
318 /* for SMB2 we need the current value */
319 spin_lock(&GlobalMid_Lock);
320 mid = server->CurrentMid++;
321 spin_unlock(&GlobalMid_Lock);
326 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
328 spin_lock(&GlobalMid_Lock);
329 if (server->CurrentMid >= val)
330 server->CurrentMid -= val;
331 spin_unlock(&GlobalMid_Lock);
334 static struct mid_q_entry *
335 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
337 struct mid_q_entry *mid;
338 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
339 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
341 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
342 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
346 spin_lock(&GlobalMid_Lock);
347 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
348 if ((mid->mid == wire_mid) &&
349 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
350 (mid->command == shdr->Command)) {
351 kref_get(&mid->refcount);
353 list_del_init(&mid->qhead);
354 mid->mid_flags |= MID_DELETED;
356 spin_unlock(&GlobalMid_Lock);
360 spin_unlock(&GlobalMid_Lock);
364 static struct mid_q_entry *
365 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
367 return __smb2_find_mid(server, buf, false);
370 static struct mid_q_entry *
371 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
373 return __smb2_find_mid(server, buf, true);
377 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
379 #ifdef CONFIG_CIFS_DEBUG2
380 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
382 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
383 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
384 shdr->Id.SyncId.ProcessId);
385 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
386 server->ops->calc_smb_size(buf, server));
391 smb2_need_neg(struct TCP_Server_Info *server)
393 return server->max_read == 0;
397 smb2_negotiate(const unsigned int xid,
398 struct cifs_ses *ses,
399 struct TCP_Server_Info *server)
403 spin_lock(&GlobalMid_Lock);
404 server->CurrentMid = 0;
405 spin_unlock(&GlobalMid_Lock);
406 rc = SMB2_negotiate(xid, ses, server);
407 /* BB we probably don't need to retry with modern servers */
414 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
416 struct TCP_Server_Info *server = tcon->ses->server;
419 /* start with specified wsize, or default */
420 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
421 wsize = min_t(unsigned int, wsize, server->max_write);
422 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
423 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
429 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
431 struct TCP_Server_Info *server = tcon->ses->server;
434 /* start with specified wsize, or default */
435 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
436 wsize = min_t(unsigned int, wsize, server->max_write);
437 #ifdef CONFIG_CIFS_SMB_DIRECT
441 * Account for SMB2 data transfer packet header and
442 * possible encryption header
444 wsize = min_t(unsigned int,
446 server->smbd_conn->max_fragmented_send_size -
447 SMB2_READWRITE_PDU_HEADER_SIZE -
448 sizeof(struct smb2_transform_hdr));
450 wsize = min_t(unsigned int,
451 wsize, server->smbd_conn->max_readwrite_size);
454 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
455 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
461 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
463 struct TCP_Server_Info *server = tcon->ses->server;
466 /* start with specified rsize, or default */
467 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
468 rsize = min_t(unsigned int, rsize, server->max_read);
470 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
471 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
477 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
479 struct TCP_Server_Info *server = tcon->ses->server;
482 /* start with specified rsize, or default */
483 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
484 rsize = min_t(unsigned int, rsize, server->max_read);
485 #ifdef CONFIG_CIFS_SMB_DIRECT
489 * Account for SMB2 data transfer packet header and
490 * possible encryption header
492 rsize = min_t(unsigned int,
494 server->smbd_conn->max_fragmented_recv_size -
495 SMB2_READWRITE_PDU_HEADER_SIZE -
496 sizeof(struct smb2_transform_hdr));
498 rsize = min_t(unsigned int,
499 rsize, server->smbd_conn->max_readwrite_size);
503 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
504 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
510 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
512 struct cifs_server_iface **iface_list,
515 struct network_interface_info_ioctl_rsp *p;
516 struct sockaddr_in *addr4;
517 struct sockaddr_in6 *addr6;
518 struct iface_info_ipv4 *p4;
519 struct iface_info_ipv6 *p6;
520 struct cifs_server_iface *info;
530 * Fist pass: count and sanity check
533 bytes_left = buf_len;
535 while (bytes_left >= sizeof(*p)) {
537 next = le32_to_cpu(p->Next);
539 bytes_left -= sizeof(*p);
542 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
547 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
552 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
553 if ((bytes_left > 8) || p->Next)
554 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
558 * Second pass: extract info to internal structure
561 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
568 bytes_left = buf_len;
570 while (bytes_left >= sizeof(*p)) {
571 info->speed = le64_to_cpu(p->LinkSpeed);
572 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
573 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
575 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
576 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
577 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
578 le32_to_cpu(p->Capability));
582 * The kernel and wire socket structures have the same
583 * layout and use network byte order but make the
584 * conversion explicit in case either one changes.
587 addr4 = (struct sockaddr_in *)&info->sockaddr;
588 p4 = (struct iface_info_ipv4 *)p->Buffer;
589 addr4->sin_family = AF_INET;
590 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
592 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
593 addr4->sin_port = cpu_to_be16(CIFS_PORT);
595 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
599 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
600 p6 = (struct iface_info_ipv6 *)p->Buffer;
601 addr6->sin6_family = AF_INET6;
602 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
604 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
605 addr6->sin6_flowinfo = 0;
606 addr6->sin6_scope_id = 0;
607 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
609 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
614 "%s: skipping unsupported socket family\n",
622 next = le32_to_cpu(p->Next);
625 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
643 static int compare_iface(const void *ia, const void *ib)
645 const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
646 const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
648 return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
652 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
655 unsigned int ret_data_len = 0;
656 struct network_interface_info_ioctl_rsp *out_buf = NULL;
657 struct cifs_server_iface *iface_list;
659 struct cifs_ses *ses = tcon->ses;
661 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
662 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
663 NULL /* no data input */, 0 /* no data input */,
664 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
665 if (rc == -EOPNOTSUPP) {
667 "server does not support query network interfaces\n");
669 } else if (rc != 0) {
670 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
674 rc = parse_server_interfaces(out_buf, ret_data_len,
675 &iface_list, &iface_count);
679 /* sort interfaces from fastest to slowest */
680 sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
682 spin_lock(&ses->iface_lock);
683 kfree(ses->iface_list);
684 ses->iface_list = iface_list;
685 ses->iface_count = iface_count;
686 ses->iface_last_update = jiffies;
687 spin_unlock(&ses->iface_lock);
695 smb2_close_cached_fid(struct kref *ref)
697 struct cached_fid *cfid = container_of(ref, struct cached_fid,
700 if (cfid->is_valid) {
701 cifs_dbg(FYI, "clear cached root file handle\n");
702 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
703 cfid->fid->volatile_fid);
707 * We only check validity above to send SMB2_close,
708 * but we still need to invalidate these entries
709 * when this function is called
711 cfid->is_valid = false;
712 cfid->file_all_info_is_valid = false;
713 cfid->has_lease = false;
720 void close_cached_dir(struct cached_fid *cfid)
722 mutex_lock(&cfid->fid_mutex);
723 kref_put(&cfid->refcount, smb2_close_cached_fid);
724 mutex_unlock(&cfid->fid_mutex);
727 void close_cached_dir_lease_locked(struct cached_fid *cfid)
729 if (cfid->has_lease) {
730 cfid->has_lease = false;
731 kref_put(&cfid->refcount, smb2_close_cached_fid);
735 void close_cached_dir_lease(struct cached_fid *cfid)
737 mutex_lock(&cfid->fid_mutex);
738 close_cached_dir_lease_locked(cfid);
739 mutex_unlock(&cfid->fid_mutex);
743 smb2_cached_lease_break(struct work_struct *work)
745 struct cached_fid *cfid = container_of(work,
746 struct cached_fid, lease_break);
748 close_cached_dir_lease(cfid);
752 * Open the and cache a directory handle.
753 * Only supported for the root handle.
755 int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
757 struct cifs_sb_info *cifs_sb,
758 struct cached_fid **cfid)
760 struct cifs_ses *ses = tcon->ses;
761 struct TCP_Server_Info *server = ses->server;
762 struct cifs_open_parms oparms;
763 struct smb2_create_rsp *o_rsp = NULL;
764 struct smb2_query_info_rsp *qi_rsp = NULL;
766 struct smb_rqst rqst[2];
767 struct kvec rsp_iov[2];
768 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
769 struct kvec qi_iov[1];
771 __le16 utf16_path = 0; /* Null - since an open of top of share */
772 u8 oplock = SMB2_OPLOCK_LEVEL_II;
773 struct cifs_fid *pfid;
774 struct dentry *dentry;
776 if (tcon->nohandlecache)
779 if (cifs_sb->root == NULL)
785 dentry = cifs_sb->root;
787 mutex_lock(&tcon->crfid.fid_mutex);
788 if (tcon->crfid.is_valid) {
789 cifs_dbg(FYI, "found a cached root file handle\n");
790 *cfid = &tcon->crfid;
791 kref_get(&tcon->crfid.refcount);
792 mutex_unlock(&tcon->crfid.fid_mutex);
797 * We do not hold the lock for the open because in case
798 * SMB2_open needs to reconnect, it will end up calling
799 * cifs_mark_open_files_invalid() which takes the lock again
800 * thus causing a deadlock
803 mutex_unlock(&tcon->crfid.fid_mutex);
805 if (smb3_encryption_required(tcon))
806 flags |= CIFS_TRANSFORM_REQ;
808 if (!server->ops->new_lease_key)
811 pfid = tcon->crfid.fid;
812 server->ops->new_lease_key(pfid);
814 memset(rqst, 0, sizeof(rqst));
815 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
816 memset(rsp_iov, 0, sizeof(rsp_iov));
819 memset(&open_iov, 0, sizeof(open_iov));
820 rqst[0].rq_iov = open_iov;
821 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
824 oparms.create_options = cifs_create_options(cifs_sb, 0);
825 oparms.desired_access = FILE_READ_ATTRIBUTES;
826 oparms.disposition = FILE_OPEN;
828 oparms.reconnect = false;
830 rc = SMB2_open_init(tcon, server,
831 &rqst[0], &oplock, &oparms, &utf16_path);
834 smb2_set_next_command(tcon, &rqst[0]);
836 memset(&qi_iov, 0, sizeof(qi_iov));
837 rqst[1].rq_iov = qi_iov;
840 rc = SMB2_query_info_init(tcon, server,
841 &rqst[1], COMPOUND_FID,
842 COMPOUND_FID, FILE_ALL_INFORMATION,
844 sizeof(struct smb2_file_all_info) +
845 PATH_MAX * 2, 0, NULL);
849 smb2_set_related(&rqst[1]);
851 rc = compound_send_recv(xid, ses, server,
853 resp_buftype, rsp_iov);
854 mutex_lock(&tcon->crfid.fid_mutex);
857 * Now we need to check again as the cached root might have
858 * been successfully re-opened from a concurrent process
861 if (tcon->crfid.is_valid) {
862 /* work was already done */
864 /* stash fids for close() later */
865 struct cifs_fid fid = {
866 .persistent_fid = pfid->persistent_fid,
867 .volatile_fid = pfid->volatile_fid,
871 * caller expects this func to set the fid in crfid to valid
872 * cached root, so increment the refcount.
874 kref_get(&tcon->crfid.refcount);
876 mutex_unlock(&tcon->crfid.fid_mutex);
879 /* close extra handle outside of crit sec */
880 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
886 /* Cached root is still invalid, continue normaly */
889 if (rc == -EREMCHG) {
890 tcon->need_reconnect = true;
891 pr_warn_once("server share %s deleted\n",
897 atomic_inc(&tcon->num_remote_opens);
899 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
900 oparms.fid->persistent_fid = le64_to_cpu(o_rsp->PersistentFileId);
901 oparms.fid->volatile_fid = le64_to_cpu(o_rsp->VolatileFileId);
902 #ifdef CONFIG_CIFS_DEBUG2
903 oparms.fid->mid = le64_to_cpu(o_rsp->hdr.MessageId);
904 #endif /* CIFS_DEBUG2 */
906 tcon->crfid.tcon = tcon;
907 tcon->crfid.is_valid = true;
908 tcon->crfid.dentry = dentry;
910 kref_init(&tcon->crfid.refcount);
912 /* BB TBD check to see if oplock level check can be removed below */
913 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
915 * See commit 2f94a3125b87. Increment the refcount when we
916 * get a lease for root, release it if lease break occurs
918 kref_get(&tcon->crfid.refcount);
919 tcon->crfid.has_lease = true;
920 smb2_parse_contexts(server, o_rsp,
922 oparms.fid->lease_key, &oplock,
927 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
928 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
930 if (!smb2_validate_and_copy_iov(
931 le16_to_cpu(qi_rsp->OutputBufferOffset),
932 sizeof(struct smb2_file_all_info),
933 &rsp_iov[1], sizeof(struct smb2_file_all_info),
934 (char *)&tcon->crfid.file_all_info))
935 tcon->crfid.file_all_info_is_valid = true;
936 tcon->crfid.time = jiffies;
940 mutex_unlock(&tcon->crfid.fid_mutex);
942 SMB2_open_free(&rqst[0]);
943 SMB2_query_info_free(&rqst[1]);
944 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
945 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
947 *cfid = &tcon->crfid;
951 int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
952 struct dentry *dentry,
953 struct cached_fid **cfid)
955 mutex_lock(&tcon->crfid.fid_mutex);
956 if (tcon->crfid.dentry == dentry) {
957 cifs_dbg(FYI, "found a cached root file handle by dentry\n");
958 *cfid = &tcon->crfid;
959 kref_get(&tcon->crfid.refcount);
960 mutex_unlock(&tcon->crfid.fid_mutex);
963 mutex_unlock(&tcon->crfid.fid_mutex);
968 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
969 struct cifs_sb_info *cifs_sb)
972 __le16 srch_path = 0; /* Null - open root of share */
973 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
974 struct cifs_open_parms oparms;
976 struct cached_fid *cfid = NULL;
979 oparms.desired_access = FILE_READ_ATTRIBUTES;
980 oparms.disposition = FILE_OPEN;
981 oparms.create_options = cifs_create_options(cifs_sb, 0);
983 oparms.reconnect = false;
985 rc = open_cached_dir(xid, tcon, "", cifs_sb, &cfid);
987 memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
989 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
994 SMB3_request_interfaces(xid, tcon);
996 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
997 FS_ATTRIBUTE_INFORMATION);
998 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
999 FS_DEVICE_INFORMATION);
1000 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1001 FS_VOLUME_INFORMATION);
1002 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1003 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
1005 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1007 close_cached_dir(cfid);
1011 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
1012 struct cifs_sb_info *cifs_sb)
1015 __le16 srch_path = 0; /* Null - open root of share */
1016 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1017 struct cifs_open_parms oparms;
1018 struct cifs_fid fid;
1021 oparms.desired_access = FILE_READ_ATTRIBUTES;
1022 oparms.disposition = FILE_OPEN;
1023 oparms.create_options = cifs_create_options(cifs_sb, 0);
1025 oparms.reconnect = false;
1027 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
1032 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1033 FS_ATTRIBUTE_INFORMATION);
1034 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1035 FS_DEVICE_INFORMATION);
1036 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1040 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
1041 struct cifs_sb_info *cifs_sb, const char *full_path)
1045 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1046 struct cifs_open_parms oparms;
1047 struct cifs_fid fid;
1049 if ((*full_path == 0) && tcon->crfid.is_valid)
1052 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1057 oparms.desired_access = FILE_READ_ATTRIBUTES;
1058 oparms.disposition = FILE_OPEN;
1059 oparms.create_options = cifs_create_options(cifs_sb, 0);
1061 oparms.reconnect = false;
1063 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
1070 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1076 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
1077 struct cifs_sb_info *cifs_sb, const char *full_path,
1078 u64 *uniqueid, FILE_ALL_INFO *data)
1080 *uniqueid = le64_to_cpu(data->IndexNumber);
1085 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
1086 struct cifs_fid *fid, FILE_ALL_INFO *data)
1089 struct smb2_file_all_info *smb2_data;
1091 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1093 if (smb2_data == NULL)
1096 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
1099 move_smb2_info_to_cifs(data, smb2_data);
1104 #ifdef CONFIG_CIFS_XATTR
1106 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
1107 struct smb2_file_full_ea_info *src, size_t src_size,
1108 const unsigned char *ea_name)
1111 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
1113 size_t buf_size = dst_size;
1114 size_t name_len, value_len, user_name_len;
1116 while (src_size > 0) {
1117 name = &src->ea_data[0];
1118 name_len = (size_t)src->ea_name_length;
1119 value = &src->ea_data[src->ea_name_length + 1];
1120 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1125 if (src_size < 8 + name_len + 1 + value_len) {
1126 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1132 if (ea_name_len == name_len &&
1133 memcmp(ea_name, name, name_len) == 0) {
1137 if (dst_size < value_len) {
1141 memcpy(dst, value, value_len);
1145 /* 'user.' plus a terminating null */
1146 user_name_len = 5 + 1 + name_len;
1148 if (buf_size == 0) {
1149 /* skip copy - calc size only */
1150 rc += user_name_len;
1151 } else if (dst_size >= user_name_len) {
1152 dst_size -= user_name_len;
1153 memcpy(dst, "user.", 5);
1155 memcpy(dst, src->ea_data, name_len);
1159 rc += user_name_len;
1161 /* stop before overrun buffer */
1167 if (!src->next_entry_offset)
1170 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1171 /* stop before overrun buffer */
1175 src_size -= le32_to_cpu(src->next_entry_offset);
1176 src = (void *)((char *)src +
1177 le32_to_cpu(src->next_entry_offset));
1180 /* didn't find the named attribute */
1189 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1190 const unsigned char *path, const unsigned char *ea_name,
1191 char *ea_data, size_t buf_size,
1192 struct cifs_sb_info *cifs_sb)
1196 struct kvec rsp_iov = {NULL, 0};
1197 int buftype = CIFS_NO_BUFFER;
1198 struct smb2_query_info_rsp *rsp;
1199 struct smb2_file_full_ea_info *info = NULL;
1201 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1205 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1207 FILE_FULL_EA_INFORMATION,
1210 MAX_SMB2_CREATE_RESPONSE_SIZE -
1211 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1212 &rsp_iov, &buftype, cifs_sb);
1215 * If ea_name is NULL (listxattr) and there are no EAs,
1216 * return 0 as it's not an error. Otherwise, the specified
1217 * ea_name was not found.
1219 if (!ea_name && rc == -ENODATA)
1224 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1225 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1226 le32_to_cpu(rsp->OutputBufferLength),
1228 sizeof(struct smb2_file_full_ea_info));
1232 info = (struct smb2_file_full_ea_info *)(
1233 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1234 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1235 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1239 free_rsp_buf(buftype, rsp_iov.iov_base);
1245 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1246 const char *path, const char *ea_name, const void *ea_value,
1247 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1248 struct cifs_sb_info *cifs_sb)
1250 struct cifs_ses *ses = tcon->ses;
1251 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1252 __le16 *utf16_path = NULL;
1253 int ea_name_len = strlen(ea_name);
1254 int flags = CIFS_CP_CREATE_CLOSE_OP;
1256 struct smb_rqst rqst[3];
1257 int resp_buftype[3];
1258 struct kvec rsp_iov[3];
1259 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1260 struct cifs_open_parms oparms;
1261 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1262 struct cifs_fid fid;
1263 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1264 unsigned int size[1];
1266 struct smb2_file_full_ea_info *ea = NULL;
1267 struct kvec close_iov[1];
1268 struct smb2_query_info_rsp *rsp;
1269 int rc, used_len = 0;
1271 if (smb3_encryption_required(tcon))
1272 flags |= CIFS_TRANSFORM_REQ;
1274 if (ea_name_len > 255)
1277 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1281 memset(rqst, 0, sizeof(rqst));
1282 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1283 memset(rsp_iov, 0, sizeof(rsp_iov));
1285 if (ses->server->ops->query_all_EAs) {
1287 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1293 /* If we are adding a attribute we should first check
1294 * if there will be enough space available to store
1295 * the new EA. If not we should not add it since we
1296 * would not be able to even read the EAs back.
1298 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1300 FILE_FULL_EA_INFORMATION,
1303 MAX_SMB2_CREATE_RESPONSE_SIZE -
1304 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1305 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1307 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1308 used_len = le32_to_cpu(rsp->OutputBufferLength);
1310 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1311 resp_buftype[1] = CIFS_NO_BUFFER;
1312 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1315 /* Use a fudge factor of 256 bytes in case we collide
1316 * with a different set_EAs command.
1318 if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1319 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1320 used_len + ea_name_len + ea_value_len + 1) {
1328 memset(&open_iov, 0, sizeof(open_iov));
1329 rqst[0].rq_iov = open_iov;
1330 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1332 memset(&oparms, 0, sizeof(oparms));
1334 oparms.desired_access = FILE_WRITE_EA;
1335 oparms.disposition = FILE_OPEN;
1336 oparms.create_options = cifs_create_options(cifs_sb, 0);
1338 oparms.reconnect = false;
1340 rc = SMB2_open_init(tcon, server,
1341 &rqst[0], &oplock, &oparms, utf16_path);
1344 smb2_set_next_command(tcon, &rqst[0]);
1348 memset(&si_iov, 0, sizeof(si_iov));
1349 rqst[1].rq_iov = si_iov;
1350 rqst[1].rq_nvec = 1;
1352 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1353 ea = kzalloc(len, GFP_KERNEL);
1359 ea->ea_name_length = ea_name_len;
1360 ea->ea_value_length = cpu_to_le16(ea_value_len);
1361 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1362 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1367 rc = SMB2_set_info_init(tcon, server,
1368 &rqst[1], COMPOUND_FID,
1369 COMPOUND_FID, current->tgid,
1370 FILE_FULL_EA_INFORMATION,
1371 SMB2_O_INFO_FILE, 0, data, size);
1372 smb2_set_next_command(tcon, &rqst[1]);
1373 smb2_set_related(&rqst[1]);
1377 memset(&close_iov, 0, sizeof(close_iov));
1378 rqst[2].rq_iov = close_iov;
1379 rqst[2].rq_nvec = 1;
1380 rc = SMB2_close_init(tcon, server,
1381 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1382 smb2_set_related(&rqst[2]);
1384 rc = compound_send_recv(xid, ses, server,
1386 resp_buftype, rsp_iov);
1387 /* no need to bump num_remote_opens because handle immediately closed */
1392 SMB2_open_free(&rqst[0]);
1393 SMB2_set_info_free(&rqst[1]);
1394 SMB2_close_free(&rqst[2]);
1395 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1396 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1397 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1403 smb2_can_echo(struct TCP_Server_Info *server)
1405 return server->echoes;
1409 smb2_clear_stats(struct cifs_tcon *tcon)
1413 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1414 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1415 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1420 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1422 seq_puts(m, "\n\tShare Capabilities:");
1423 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1424 seq_puts(m, " DFS,");
1425 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1426 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1427 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1428 seq_puts(m, " SCALEOUT,");
1429 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1430 seq_puts(m, " CLUSTER,");
1431 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1432 seq_puts(m, " ASYMMETRIC,");
1433 if (tcon->capabilities == 0)
1434 seq_puts(m, " None");
1435 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1436 seq_puts(m, " Aligned,");
1437 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1438 seq_puts(m, " Partition Aligned,");
1439 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1440 seq_puts(m, " SSD,");
1441 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1442 seq_puts(m, " TRIM-support,");
1444 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1445 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1446 if (tcon->perf_sector_size)
1447 seq_printf(m, "\tOptimal sector size: 0x%x",
1448 tcon->perf_sector_size);
1449 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1453 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1455 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1456 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1459 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1460 * totals (requests sent) since those SMBs are per-session not per tcon
1462 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1463 (long long)(tcon->bytes_read),
1464 (long long)(tcon->bytes_written));
1465 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1466 atomic_read(&tcon->num_local_opens),
1467 atomic_read(&tcon->num_remote_opens));
1468 seq_printf(m, "\nTreeConnects: %d total %d failed",
1469 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1470 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1471 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1472 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1473 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1474 seq_printf(m, "\nCreates: %d total %d failed",
1475 atomic_read(&sent[SMB2_CREATE_HE]),
1476 atomic_read(&failed[SMB2_CREATE_HE]));
1477 seq_printf(m, "\nCloses: %d total %d failed",
1478 atomic_read(&sent[SMB2_CLOSE_HE]),
1479 atomic_read(&failed[SMB2_CLOSE_HE]));
1480 seq_printf(m, "\nFlushes: %d total %d failed",
1481 atomic_read(&sent[SMB2_FLUSH_HE]),
1482 atomic_read(&failed[SMB2_FLUSH_HE]));
1483 seq_printf(m, "\nReads: %d total %d failed",
1484 atomic_read(&sent[SMB2_READ_HE]),
1485 atomic_read(&failed[SMB2_READ_HE]));
1486 seq_printf(m, "\nWrites: %d total %d failed",
1487 atomic_read(&sent[SMB2_WRITE_HE]),
1488 atomic_read(&failed[SMB2_WRITE_HE]));
1489 seq_printf(m, "\nLocks: %d total %d failed",
1490 atomic_read(&sent[SMB2_LOCK_HE]),
1491 atomic_read(&failed[SMB2_LOCK_HE]));
1492 seq_printf(m, "\nIOCTLs: %d total %d failed",
1493 atomic_read(&sent[SMB2_IOCTL_HE]),
1494 atomic_read(&failed[SMB2_IOCTL_HE]));
1495 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1496 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1497 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1498 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1499 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1500 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1501 seq_printf(m, "\nQueryInfos: %d total %d failed",
1502 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1503 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1504 seq_printf(m, "\nSetInfos: %d total %d failed",
1505 atomic_read(&sent[SMB2_SET_INFO_HE]),
1506 atomic_read(&failed[SMB2_SET_INFO_HE]));
1507 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1508 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1509 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1513 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1515 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1516 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1518 cfile->fid.persistent_fid = fid->persistent_fid;
1519 cfile->fid.volatile_fid = fid->volatile_fid;
1520 cfile->fid.access = fid->access;
1521 #ifdef CONFIG_CIFS_DEBUG2
1522 cfile->fid.mid = fid->mid;
1523 #endif /* CIFS_DEBUG2 */
1524 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1526 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1527 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1531 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1532 struct cifs_fid *fid)
1534 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1538 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1539 struct cifsFileInfo *cfile)
1541 struct smb2_file_network_open_info file_inf;
1542 struct inode *inode;
1545 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1546 cfile->fid.volatile_fid, &file_inf);
1550 inode = d_inode(cfile->dentry);
1552 spin_lock(&inode->i_lock);
1553 CIFS_I(inode)->time = jiffies;
1555 /* Creation time should not need to be updated on close */
1556 if (file_inf.LastWriteTime)
1557 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1558 if (file_inf.ChangeTime)
1559 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1560 if (file_inf.LastAccessTime)
1561 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1564 * i_blocks is not related to (i_size / i_blksize),
1565 * but instead 512 byte (2**9) size is required for
1566 * calculating num blocks.
1568 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1570 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1572 /* End of file and Attributes should not have to be updated on close */
1573 spin_unlock(&inode->i_lock);
1577 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1578 u64 persistent_fid, u64 volatile_fid,
1579 struct copychunk_ioctl *pcchunk)
1582 unsigned int ret_data_len;
1583 struct resume_key_req *res_key;
1585 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1586 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1587 NULL, 0 /* no input */, CIFSMaxBufSize,
1588 (char **)&res_key, &ret_data_len);
1590 if (rc == -EOPNOTSUPP) {
1591 pr_warn_once("Server share %s does not support copy range\n", tcon->treeName);
1592 goto req_res_key_exit;
1594 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1595 goto req_res_key_exit;
1597 if (ret_data_len < sizeof(struct resume_key_req)) {
1598 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1600 goto req_res_key_exit;
1602 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1610 struct smb_rqst rqst[3];
1611 struct kvec rsp_iov[3];
1612 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1613 struct kvec qi_iov[1];
1614 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1615 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1616 struct kvec close_iov[1];
1620 smb2_ioctl_query_info(const unsigned int xid,
1621 struct cifs_tcon *tcon,
1622 struct cifs_sb_info *cifs_sb,
1623 __le16 *path, int is_dir,
1626 struct iqi_vars *vars;
1627 struct smb_rqst *rqst;
1628 struct kvec *rsp_iov;
1629 struct cifs_ses *ses = tcon->ses;
1630 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1631 char __user *arg = (char __user *)p;
1632 struct smb_query_info qi;
1633 struct smb_query_info __user *pqi;
1635 int flags = CIFS_CP_CREATE_CLOSE_OP;
1636 struct smb2_query_info_rsp *qi_rsp = NULL;
1637 struct smb2_ioctl_rsp *io_rsp = NULL;
1638 void *buffer = NULL;
1639 int resp_buftype[3];
1640 struct cifs_open_parms oparms;
1641 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1642 struct cifs_fid fid;
1643 unsigned int size[2];
1645 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1647 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1650 rqst = &vars->rqst[0];
1651 rsp_iov = &vars->rsp_iov[0];
1653 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1655 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1658 if (qi.output_buffer_length > 1024) {
1663 if (!ses || !server) {
1668 if (smb3_encryption_required(tcon))
1669 flags |= CIFS_TRANSFORM_REQ;
1671 buffer = memdup_user(arg + sizeof(struct smb_query_info),
1672 qi.output_buffer_length);
1673 if (IS_ERR(buffer)) {
1675 return PTR_ERR(buffer);
1679 rqst[0].rq_iov = &vars->open_iov[0];
1680 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1682 memset(&oparms, 0, sizeof(oparms));
1684 oparms.disposition = FILE_OPEN;
1685 oparms.create_options = cifs_create_options(cifs_sb, create_options);
1687 oparms.reconnect = false;
1689 if (qi.flags & PASSTHRU_FSCTL) {
1690 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1691 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1692 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1694 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1695 oparms.desired_access = GENERIC_ALL;
1697 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1698 oparms.desired_access = GENERIC_READ;
1700 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1701 oparms.desired_access = GENERIC_WRITE;
1704 } else if (qi.flags & PASSTHRU_SET_INFO) {
1705 oparms.desired_access = GENERIC_WRITE;
1707 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1710 rc = SMB2_open_init(tcon, server,
1711 &rqst[0], &oplock, &oparms, path);
1714 smb2_set_next_command(tcon, &rqst[0]);
1717 if (qi.flags & PASSTHRU_FSCTL) {
1718 /* Can eventually relax perm check since server enforces too */
1719 if (!capable(CAP_SYS_ADMIN))
1722 rqst[1].rq_iov = &vars->io_iov[0];
1723 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1725 rc = SMB2_ioctl_init(tcon, server,
1727 COMPOUND_FID, COMPOUND_FID,
1728 qi.info_type, true, buffer,
1729 qi.output_buffer_length,
1731 MAX_SMB2_CREATE_RESPONSE_SIZE -
1732 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1734 } else if (qi.flags == PASSTHRU_SET_INFO) {
1735 /* Can eventually relax perm check since server enforces too */
1736 if (!capable(CAP_SYS_ADMIN))
1739 rqst[1].rq_iov = &vars->si_iov[0];
1740 rqst[1].rq_nvec = 1;
1745 rc = SMB2_set_info_init(tcon, server,
1747 COMPOUND_FID, COMPOUND_FID,
1749 FILE_END_OF_FILE_INFORMATION,
1750 SMB2_O_INFO_FILE, 0, data, size);
1752 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1753 rqst[1].rq_iov = &vars->qi_iov[0];
1754 rqst[1].rq_nvec = 1;
1756 rc = SMB2_query_info_init(tcon, server,
1757 &rqst[1], COMPOUND_FID,
1758 COMPOUND_FID, qi.file_info_class,
1759 qi.info_type, qi.additional_information,
1760 qi.input_buffer_length,
1761 qi.output_buffer_length, buffer);
1762 } else { /* unknown flags */
1763 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1770 smb2_set_next_command(tcon, &rqst[1]);
1771 smb2_set_related(&rqst[1]);
1774 rqst[2].rq_iov = &vars->close_iov[0];
1775 rqst[2].rq_nvec = 1;
1777 rc = SMB2_close_init(tcon, server,
1778 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1781 smb2_set_related(&rqst[2]);
1783 rc = compound_send_recv(xid, ses, server,
1785 resp_buftype, rsp_iov);
1789 /* No need to bump num_remote_opens since handle immediately closed */
1790 if (qi.flags & PASSTHRU_FSCTL) {
1791 pqi = (struct smb_query_info __user *)arg;
1792 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1793 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1794 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1795 if (qi.input_buffer_length > 0 &&
1796 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1797 > rsp_iov[1].iov_len)
1800 if (copy_to_user(&pqi->input_buffer_length,
1801 &qi.input_buffer_length,
1802 sizeof(qi.input_buffer_length)))
1805 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1806 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1807 qi.input_buffer_length))
1810 pqi = (struct smb_query_info __user *)arg;
1811 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1812 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1813 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1814 if (copy_to_user(&pqi->input_buffer_length,
1815 &qi.input_buffer_length,
1816 sizeof(qi.input_buffer_length)))
1819 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1820 qi.input_buffer_length))
1825 cifs_small_buf_release(rqst[0].rq_iov[0].iov_base);
1826 cifs_small_buf_release(rqst[1].rq_iov[0].iov_base);
1827 cifs_small_buf_release(rqst[2].rq_iov[0].iov_base);
1828 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1829 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1830 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1841 smb2_copychunk_range(const unsigned int xid,
1842 struct cifsFileInfo *srcfile,
1843 struct cifsFileInfo *trgtfile, u64 src_off,
1844 u64 len, u64 dest_off)
1847 unsigned int ret_data_len;
1848 struct copychunk_ioctl *pcchunk;
1849 struct copychunk_ioctl_rsp *retbuf = NULL;
1850 struct cifs_tcon *tcon;
1851 int chunks_copied = 0;
1852 bool chunk_sizes_updated = false;
1853 ssize_t bytes_written, total_bytes_written = 0;
1855 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1857 if (pcchunk == NULL)
1860 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1861 /* Request a key from the server to identify the source of the copy */
1862 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1863 srcfile->fid.persistent_fid,
1864 srcfile->fid.volatile_fid, pcchunk);
1866 /* Note: request_res_key sets res_key null only if rc !=0 */
1870 /* For now array only one chunk long, will make more flexible later */
1871 pcchunk->ChunkCount = cpu_to_le32(1);
1872 pcchunk->Reserved = 0;
1873 pcchunk->Reserved2 = 0;
1875 tcon = tlink_tcon(trgtfile->tlink);
1878 pcchunk->SourceOffset = cpu_to_le64(src_off);
1879 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1881 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1883 /* Request server copy to target from src identified by key */
1886 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1887 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1888 true /* is_fsctl */, (char *)pcchunk,
1889 sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1890 (char **)&retbuf, &ret_data_len);
1893 sizeof(struct copychunk_ioctl_rsp)) {
1894 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1898 if (retbuf->TotalBytesWritten == 0) {
1899 cifs_dbg(FYI, "no bytes copied\n");
1904 * Check if server claimed to write more than we asked
1906 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1907 le32_to_cpu(pcchunk->Length)) {
1908 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1912 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1913 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1919 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1920 src_off += bytes_written;
1921 dest_off += bytes_written;
1922 len -= bytes_written;
1923 total_bytes_written += bytes_written;
1925 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1926 le32_to_cpu(retbuf->ChunksWritten),
1927 le32_to_cpu(retbuf->ChunkBytesWritten),
1929 } else if (rc == -EINVAL) {
1930 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1933 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1934 le32_to_cpu(retbuf->ChunksWritten),
1935 le32_to_cpu(retbuf->ChunkBytesWritten),
1936 le32_to_cpu(retbuf->TotalBytesWritten));
1939 * Check if this is the first request using these sizes,
1940 * (ie check if copy succeed once with original sizes
1941 * and check if the server gave us different sizes after
1942 * we already updated max sizes on previous request).
1943 * if not then why is the server returning an error now
1945 if ((chunks_copied != 0) || chunk_sizes_updated)
1948 /* Check that server is not asking us to grow size */
1949 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1950 tcon->max_bytes_chunk)
1951 tcon->max_bytes_chunk =
1952 le32_to_cpu(retbuf->ChunkBytesWritten);
1954 goto cchunk_out; /* server gave us bogus size */
1956 /* No need to change MaxChunks since already set to 1 */
1957 chunk_sizes_updated = true;
1968 return total_bytes_written;
1972 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1973 struct cifs_fid *fid)
1975 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1979 smb2_read_data_offset(char *buf)
1981 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1983 return rsp->DataOffset;
1987 smb2_read_data_length(char *buf, bool in_remaining)
1989 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1992 return le32_to_cpu(rsp->DataRemaining);
1994 return le32_to_cpu(rsp->DataLength);
1999 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
2000 struct cifs_io_parms *parms, unsigned int *bytes_read,
2001 char **buf, int *buf_type)
2003 parms->persistent_fid = pfid->persistent_fid;
2004 parms->volatile_fid = pfid->volatile_fid;
2005 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
2009 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
2010 struct cifs_io_parms *parms, unsigned int *written,
2011 struct kvec *iov, unsigned long nr_segs)
2014 parms->persistent_fid = pfid->persistent_fid;
2015 parms->volatile_fid = pfid->volatile_fid;
2016 return SMB2_write(xid, parms, written, iov, nr_segs);
2019 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
2020 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
2021 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
2023 struct cifsInodeInfo *cifsi;
2026 cifsi = CIFS_I(inode);
2028 /* if file already sparse don't bother setting sparse again */
2029 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
2030 return true; /* already sparse */
2032 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
2033 return true; /* already not sparse */
2036 * Can't check for sparse support on share the usual way via the
2037 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
2038 * since Samba server doesn't set the flag on the share, yet
2039 * supports the set sparse FSCTL and returns sparse correctly
2040 * in the file attributes. If we fail setting sparse though we
2041 * mark that server does not support sparse files for this share
2042 * to avoid repeatedly sending the unsupported fsctl to server
2043 * if the file is repeatedly extended.
2045 if (tcon->broken_sparse_sup)
2048 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2049 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
2051 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
2053 tcon->broken_sparse_sup = true;
2054 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
2059 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
2061 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
2067 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
2068 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
2070 __le64 eof = cpu_to_le64(size);
2071 struct inode *inode;
2074 * If extending file more than one page make sparse. Many Linux fs
2075 * make files sparse by default when extending via ftruncate
2077 inode = d_inode(cfile->dentry);
2079 if (!set_alloc && (size > inode->i_size + 8192)) {
2080 __u8 set_sparse = 1;
2082 /* whether set sparse succeeds or not, extend the file */
2083 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
2086 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2087 cfile->fid.volatile_fid, cfile->pid, &eof);
2091 smb2_duplicate_extents(const unsigned int xid,
2092 struct cifsFileInfo *srcfile,
2093 struct cifsFileInfo *trgtfile, u64 src_off,
2094 u64 len, u64 dest_off)
2097 unsigned int ret_data_len;
2098 struct inode *inode;
2099 struct duplicate_extents_to_file dup_ext_buf;
2100 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2102 /* server fileays advertise duplicate extent support with this flag */
2103 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2104 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2107 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2108 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2109 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2110 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2111 dup_ext_buf.ByteCount = cpu_to_le64(len);
2112 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2113 src_off, dest_off, len);
2115 inode = d_inode(trgtfile->dentry);
2116 if (inode->i_size < dest_off + len) {
2117 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2119 goto duplicate_extents_out;
2122 * Although also could set plausible allocation size (i_blocks)
2123 * here in addition to setting the file size, in reflink
2124 * it is likely that the target file is sparse. Its allocation
2125 * size will be queried on next revalidate, but it is important
2126 * to make sure that file's cached size is updated immediately
2128 cifs_setsize(inode, dest_off + len);
2130 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2131 trgtfile->fid.volatile_fid,
2132 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2133 true /* is_fsctl */,
2134 (char *)&dup_ext_buf,
2135 sizeof(struct duplicate_extents_to_file),
2136 CIFSMaxBufSize, NULL,
2139 if (ret_data_len > 0)
2140 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2142 duplicate_extents_out:
2147 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2148 struct cifsFileInfo *cfile)
2150 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2151 cfile->fid.volatile_fid);
2155 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2156 struct cifsFileInfo *cfile)
2158 struct fsctl_set_integrity_information_req integr_info;
2159 unsigned int ret_data_len;
2161 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2162 integr_info.Flags = 0;
2163 integr_info.Reserved = 0;
2165 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2166 cfile->fid.volatile_fid,
2167 FSCTL_SET_INTEGRITY_INFORMATION,
2168 true /* is_fsctl */,
2169 (char *)&integr_info,
2170 sizeof(struct fsctl_set_integrity_information_req),
2171 CIFSMaxBufSize, NULL,
2176 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2177 #define GMT_TOKEN_SIZE 50
2179 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2182 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2183 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2186 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2187 struct cifsFileInfo *cfile, void __user *ioc_buf)
2189 char *retbuf = NULL;
2190 unsigned int ret_data_len = 0;
2192 u32 max_response_size;
2193 struct smb_snapshot_array snapshot_in;
2196 * On the first query to enumerate the list of snapshots available
2197 * for this volume the buffer begins with 0 (number of snapshots
2198 * which can be returned is zero since at that point we do not know
2199 * how big the buffer needs to be). On the second query,
2200 * it (ret_data_len) is set to number of snapshots so we can
2201 * know to set the maximum response size larger (see below).
2203 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2207 * Note that for snapshot queries that servers like Azure expect that
2208 * the first query be minimal size (and just used to get the number/size
2209 * of previous versions) so response size must be specified as EXACTLY
2210 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2213 if (ret_data_len == 0)
2214 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2216 max_response_size = CIFSMaxBufSize;
2218 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2219 cfile->fid.volatile_fid,
2220 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2221 true /* is_fsctl */,
2222 NULL, 0 /* no input data */, max_response_size,
2225 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2230 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2232 if (copy_from_user(&snapshot_in, ioc_buf,
2233 sizeof(struct smb_snapshot_array))) {
2240 * Check for min size, ie not large enough to fit even one GMT
2241 * token (snapshot). On the first ioctl some users may pass in
2242 * smaller size (or zero) to simply get the size of the array
2243 * so the user space caller can allocate sufficient memory
2244 * and retry the ioctl again with larger array size sufficient
2245 * to hold all of the snapshot GMT tokens on the second try.
2247 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2248 ret_data_len = sizeof(struct smb_snapshot_array);
2251 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2252 * the snapshot array (of 50 byte GMT tokens) each
2253 * representing an available previous version of the data
2255 if (ret_data_len > (snapshot_in.snapshot_array_size +
2256 sizeof(struct smb_snapshot_array)))
2257 ret_data_len = snapshot_in.snapshot_array_size +
2258 sizeof(struct smb_snapshot_array);
2260 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2271 smb3_notify(const unsigned int xid, struct file *pfile,
2272 void __user *ioc_buf)
2274 struct smb3_notify notify;
2275 struct dentry *dentry = pfile->f_path.dentry;
2276 struct inode *inode = file_inode(pfile);
2277 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2278 struct cifs_open_parms oparms;
2279 struct cifs_fid fid;
2280 struct cifs_tcon *tcon;
2281 const unsigned char *path;
2282 void *page = alloc_dentry_path();
2283 __le16 *utf16_path = NULL;
2284 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2287 path = build_path_from_dentry(dentry, page);
2293 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2294 if (utf16_path == NULL) {
2299 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) {
2304 tcon = cifs_sb_master_tcon(cifs_sb);
2306 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2307 oparms.disposition = FILE_OPEN;
2308 oparms.create_options = cifs_create_options(cifs_sb, 0);
2310 oparms.reconnect = false;
2312 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2317 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2318 notify.watch_tree, notify.completion_filter);
2320 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2322 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2325 free_dentry_path(page);
2331 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2332 const char *path, struct cifs_sb_info *cifs_sb,
2333 struct cifs_fid *fid, __u16 search_flags,
2334 struct cifs_search_info *srch_inf)
2337 struct smb_rqst rqst[2];
2338 struct kvec rsp_iov[2];
2339 int resp_buftype[2];
2340 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2341 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2343 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2344 struct cifs_open_parms oparms;
2345 struct smb2_query_directory_rsp *qd_rsp = NULL;
2346 struct smb2_create_rsp *op_rsp = NULL;
2347 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2348 int retry_count = 0;
2350 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2354 if (smb3_encryption_required(tcon))
2355 flags |= CIFS_TRANSFORM_REQ;
2357 memset(rqst, 0, sizeof(rqst));
2358 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2359 memset(rsp_iov, 0, sizeof(rsp_iov));
2362 memset(&open_iov, 0, sizeof(open_iov));
2363 rqst[0].rq_iov = open_iov;
2364 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2367 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2368 oparms.disposition = FILE_OPEN;
2369 oparms.create_options = cifs_create_options(cifs_sb, 0);
2371 oparms.reconnect = false;
2373 rc = SMB2_open_init(tcon, server,
2374 &rqst[0], &oplock, &oparms, utf16_path);
2377 smb2_set_next_command(tcon, &rqst[0]);
2379 /* Query directory */
2380 srch_inf->entries_in_buffer = 0;
2381 srch_inf->index_of_last_entry = 2;
2383 memset(&qd_iov, 0, sizeof(qd_iov));
2384 rqst[1].rq_iov = qd_iov;
2385 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2387 rc = SMB2_query_directory_init(xid, tcon, server,
2389 COMPOUND_FID, COMPOUND_FID,
2390 0, srch_inf->info_level);
2394 smb2_set_related(&rqst[1]);
2397 rc = compound_send_recv(xid, tcon->ses, server,
2399 resp_buftype, rsp_iov);
2401 if (rc == -EAGAIN && retry_count++ < 10)
2404 /* If the open failed there is nothing to do */
2405 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2406 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2407 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2410 fid->persistent_fid = le64_to_cpu(op_rsp->PersistentFileId);
2411 fid->volatile_fid = le64_to_cpu(op_rsp->VolatileFileId);
2413 /* Anything else than ENODATA means a genuine error */
2414 if (rc && rc != -ENODATA) {
2415 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2416 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2417 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2418 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2422 atomic_inc(&tcon->num_remote_opens);
2424 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2425 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2426 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2427 tcon->tid, tcon->ses->Suid, 0, 0);
2428 srch_inf->endOfSearch = true;
2433 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2436 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2437 tcon->ses->Suid, 0, 0, rc);
2440 resp_buftype[1] = CIFS_NO_BUFFER;
2442 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2443 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2447 SMB2_open_free(&rqst[0]);
2448 SMB2_query_directory_free(&rqst[1]);
2449 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2450 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2455 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2456 struct cifs_fid *fid, __u16 search_flags,
2457 struct cifs_search_info *srch_inf)
2459 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2460 fid->volatile_fid, 0, srch_inf);
2464 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2465 struct cifs_fid *fid)
2467 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2471 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2472 * the number of credits and return true. Otherwise - return false.
2475 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2477 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2478 int scredits, in_flight;
2480 if (shdr->Status != STATUS_PENDING)
2483 if (shdr->CreditRequest) {
2484 spin_lock(&server->req_lock);
2485 server->credits += le16_to_cpu(shdr->CreditRequest);
2486 scredits = server->credits;
2487 in_flight = server->in_flight;
2488 spin_unlock(&server->req_lock);
2489 wake_up(&server->request_q);
2491 trace_smb3_add_credits(server->CurrentMid,
2492 server->conn_id, server->hostname, scredits,
2493 le16_to_cpu(shdr->CreditRequest), in_flight);
2494 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2495 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2502 smb2_is_session_expired(char *buf)
2504 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2506 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2507 shdr->Status != STATUS_USER_SESSION_DELETED)
2510 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2511 le64_to_cpu(shdr->SessionId),
2512 le16_to_cpu(shdr->Command),
2513 le64_to_cpu(shdr->MessageId));
2514 cifs_dbg(FYI, "Session expired or deleted\n");
2520 smb2_is_status_io_timeout(char *buf)
2522 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2524 if (shdr->Status == STATUS_IO_TIMEOUT)
2531 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2533 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2534 struct list_head *tmp, *tmp1;
2535 struct cifs_ses *ses;
2536 struct cifs_tcon *tcon;
2538 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2541 spin_lock(&cifs_tcp_ses_lock);
2542 list_for_each(tmp, &server->smb_ses_list) {
2543 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
2544 list_for_each(tmp1, &ses->tcon_list) {
2545 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
2546 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2547 tcon->need_reconnect = true;
2548 spin_unlock(&cifs_tcp_ses_lock);
2549 pr_warn_once("Server share %s deleted.\n",
2555 spin_unlock(&cifs_tcp_ses_lock);
2559 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2560 struct cifsInodeInfo *cinode)
2562 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2563 return SMB2_lease_break(0, tcon, cinode->lease_key,
2564 smb2_get_lease_state(cinode));
2566 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2568 CIFS_CACHE_READ(cinode) ? 1 : 0);
2572 smb2_set_related(struct smb_rqst *rqst)
2574 struct smb2_hdr *shdr;
2576 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2578 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2581 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2584 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2587 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2589 struct smb2_hdr *shdr;
2590 struct cifs_ses *ses = tcon->ses;
2591 struct TCP_Server_Info *server = ses->server;
2592 unsigned long len = smb_rqst_len(server, rqst);
2595 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2597 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2601 /* SMB headers in a compound are 8 byte aligned. */
2603 /* No padding needed */
2607 num_padding = 8 - (len & 7);
2608 if (!smb3_encryption_required(tcon)) {
2610 * If we do not have encryption then we can just add an extra
2611 * iov for the padding.
2613 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2614 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2619 * We can not add a small padding iov for the encryption case
2620 * because the encryption framework can not handle the padding
2622 * We have to flatten this into a single buffer and add
2623 * the padding to it.
2625 for (i = 1; i < rqst->rq_nvec; i++) {
2626 memcpy(rqst->rq_iov[0].iov_base +
2627 rqst->rq_iov[0].iov_len,
2628 rqst->rq_iov[i].iov_base,
2629 rqst->rq_iov[i].iov_len);
2630 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2632 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2634 rqst->rq_iov[0].iov_len += num_padding;
2640 shdr->NextCommand = cpu_to_le32(len);
2644 * Passes the query info response back to the caller on success.
2645 * Caller need to free this with free_rsp_buf().
2648 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2649 __le16 *utf16_path, u32 desired_access,
2650 u32 class, u32 type, u32 output_len,
2651 struct kvec *rsp, int *buftype,
2652 struct cifs_sb_info *cifs_sb)
2654 struct cifs_ses *ses = tcon->ses;
2655 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2656 int flags = CIFS_CP_CREATE_CLOSE_OP;
2657 struct smb_rqst rqst[3];
2658 int resp_buftype[3];
2659 struct kvec rsp_iov[3];
2660 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2661 struct kvec qi_iov[1];
2662 struct kvec close_iov[1];
2663 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2664 struct cifs_open_parms oparms;
2665 struct cifs_fid fid;
2668 if (smb3_encryption_required(tcon))
2669 flags |= CIFS_TRANSFORM_REQ;
2671 memset(rqst, 0, sizeof(rqst));
2672 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2673 memset(rsp_iov, 0, sizeof(rsp_iov));
2675 memset(&open_iov, 0, sizeof(open_iov));
2676 rqst[0].rq_iov = open_iov;
2677 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2680 oparms.desired_access = desired_access;
2681 oparms.disposition = FILE_OPEN;
2682 oparms.create_options = cifs_create_options(cifs_sb, 0);
2684 oparms.reconnect = false;
2686 rc = SMB2_open_init(tcon, server,
2687 &rqst[0], &oplock, &oparms, utf16_path);
2690 smb2_set_next_command(tcon, &rqst[0]);
2692 memset(&qi_iov, 0, sizeof(qi_iov));
2693 rqst[1].rq_iov = qi_iov;
2694 rqst[1].rq_nvec = 1;
2696 rc = SMB2_query_info_init(tcon, server,
2697 &rqst[1], COMPOUND_FID, COMPOUND_FID,
2703 smb2_set_next_command(tcon, &rqst[1]);
2704 smb2_set_related(&rqst[1]);
2706 memset(&close_iov, 0, sizeof(close_iov));
2707 rqst[2].rq_iov = close_iov;
2708 rqst[2].rq_nvec = 1;
2710 rc = SMB2_close_init(tcon, server,
2711 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2714 smb2_set_related(&rqst[2]);
2716 rc = compound_send_recv(xid, ses, server,
2718 resp_buftype, rsp_iov);
2720 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2721 if (rc == -EREMCHG) {
2722 tcon->need_reconnect = true;
2723 pr_warn_once("server share %s deleted\n",
2729 *buftype = resp_buftype[1];
2732 SMB2_open_free(&rqst[0]);
2733 SMB2_query_info_free(&rqst[1]);
2734 SMB2_close_free(&rqst[2]);
2735 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2736 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2741 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2742 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2744 struct smb2_query_info_rsp *rsp;
2745 struct smb2_fs_full_size_info *info = NULL;
2746 __le16 utf16_path = 0; /* Null - open root of share */
2747 struct kvec rsp_iov = {NULL, 0};
2748 int buftype = CIFS_NO_BUFFER;
2752 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2753 FILE_READ_ATTRIBUTES,
2754 FS_FULL_SIZE_INFORMATION,
2755 SMB2_O_INFO_FILESYSTEM,
2756 sizeof(struct smb2_fs_full_size_info),
2757 &rsp_iov, &buftype, cifs_sb);
2761 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2762 buf->f_type = SMB2_SUPER_MAGIC;
2763 info = (struct smb2_fs_full_size_info *)(
2764 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2765 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2766 le32_to_cpu(rsp->OutputBufferLength),
2768 sizeof(struct smb2_fs_full_size_info));
2770 smb2_copy_fs_info_to_kstatfs(info, buf);
2773 free_rsp_buf(buftype, rsp_iov.iov_base);
2778 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2779 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2782 __le16 srch_path = 0; /* Null - open root of share */
2783 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2784 struct cifs_open_parms oparms;
2785 struct cifs_fid fid;
2787 if (!tcon->posix_extensions)
2788 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2791 oparms.desired_access = FILE_READ_ATTRIBUTES;
2792 oparms.disposition = FILE_OPEN;
2793 oparms.create_options = cifs_create_options(cifs_sb, 0);
2795 oparms.reconnect = false;
2797 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2802 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2803 fid.volatile_fid, buf);
2804 buf->f_type = SMB2_SUPER_MAGIC;
2805 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2810 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2812 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2813 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2817 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2818 __u64 length, __u32 type, int lock, int unlock, bool wait)
2820 if (unlock && !lock)
2821 type = SMB2_LOCKFLAG_UNLOCK;
2822 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2823 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2824 current->tgid, length, offset, type, wait);
2828 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2830 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2834 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2836 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2840 smb2_new_lease_key(struct cifs_fid *fid)
2842 generate_random_uuid(fid->lease_key);
2846 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2847 const char *search_name,
2848 struct dfs_info3_param **target_nodes,
2849 unsigned int *num_of_nodes,
2850 const struct nls_table *nls_codepage, int remap)
2853 __le16 *utf16_path = NULL;
2854 int utf16_path_len = 0;
2855 struct cifs_tcon *tcon;
2856 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2857 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2858 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2859 int retry_count = 0;
2861 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2864 * Try to use the IPC tcon, otherwise just use any
2866 tcon = ses->tcon_ipc;
2868 spin_lock(&cifs_tcp_ses_lock);
2869 tcon = list_first_entry_or_null(&ses->tcon_list,
2874 spin_unlock(&cifs_tcp_ses_lock);
2878 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2884 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2886 nls_codepage, remap);
2892 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2893 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2899 /* Highest DFS referral version understood */
2900 dfs_req->MaxReferralLevel = DFS_VERSION;
2902 /* Path to resolve in an UTF-16 null-terminated string */
2903 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2906 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2907 FSCTL_DFS_GET_REFERRALS,
2908 true /* is_fsctl */,
2909 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2910 (char **)&dfs_rsp, &dfs_rsp_size);
2911 if (!is_retryable_error(rc))
2913 usleep_range(512, 2048);
2914 } while (++retry_count < 5);
2917 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2918 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2922 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2923 num_of_nodes, target_nodes,
2924 nls_codepage, remap, search_name,
2925 true /* is_unicode */);
2927 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2932 if (tcon && !tcon->ipc) {
2933 /* ipc tcons are not refcounted */
2934 spin_lock(&cifs_tcp_ses_lock);
2936 /* tc_count can never go negative */
2937 WARN_ON(tcon->tc_count < 0);
2938 spin_unlock(&cifs_tcp_ses_lock);
2947 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2948 u32 plen, char **target_path,
2949 struct cifs_sb_info *cifs_sb)
2953 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2954 len = le16_to_cpu(symlink_buf->ReparseDataLength);
2956 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2957 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2958 le64_to_cpu(symlink_buf->InodeType));
2962 *target_path = cifs_strndup_from_utf16(
2963 symlink_buf->PathBuffer,
2964 len, true, cifs_sb->local_nls);
2965 if (!(*target_path))
2968 convert_delimiter(*target_path, '/');
2969 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2975 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2976 u32 plen, char **target_path,
2977 struct cifs_sb_info *cifs_sb)
2979 unsigned int sub_len;
2980 unsigned int sub_offset;
2982 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2984 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2985 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2986 if (sub_offset + 20 > plen ||
2987 sub_offset + sub_len + 20 > plen) {
2988 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2992 *target_path = cifs_strndup_from_utf16(
2993 symlink_buf->PathBuffer + sub_offset,
2994 sub_len, true, cifs_sb->local_nls);
2995 if (!(*target_path))
2998 convert_delimiter(*target_path, '/');
2999 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3005 parse_reparse_point(struct reparse_data_buffer *buf,
3006 u32 plen, char **target_path,
3007 struct cifs_sb_info *cifs_sb)
3009 if (plen < sizeof(struct reparse_data_buffer)) {
3010 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
3015 if (plen < le16_to_cpu(buf->ReparseDataLength) +
3016 sizeof(struct reparse_data_buffer)) {
3017 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
3022 /* See MS-FSCC 2.1.2 */
3023 switch (le32_to_cpu(buf->ReparseTag)) {
3024 case IO_REPARSE_TAG_NFS:
3025 return parse_reparse_posix(
3026 (struct reparse_posix_data *)buf,
3027 plen, target_path, cifs_sb);
3028 case IO_REPARSE_TAG_SYMLINK:
3029 return parse_reparse_symlink(
3030 (struct reparse_symlink_data_buffer *)buf,
3031 plen, target_path, cifs_sb);
3033 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
3034 le32_to_cpu(buf->ReparseTag));
3039 #define SMB2_SYMLINK_STRUCT_SIZE \
3040 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
3043 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
3044 struct cifs_sb_info *cifs_sb, const char *full_path,
3045 char **target_path, bool is_reparse_point)
3048 __le16 *utf16_path = NULL;
3049 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3050 struct cifs_open_parms oparms;
3051 struct cifs_fid fid;
3052 struct kvec err_iov = {NULL, 0};
3053 struct smb2_err_rsp *err_buf = NULL;
3054 struct smb2_symlink_err_rsp *symlink;
3055 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3056 unsigned int sub_len;
3057 unsigned int sub_offset;
3058 unsigned int print_len;
3059 unsigned int print_offset;
3060 int flags = CIFS_CP_CREATE_CLOSE_OP;
3061 struct smb_rqst rqst[3];
3062 int resp_buftype[3];
3063 struct kvec rsp_iov[3];
3064 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3065 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3066 struct kvec close_iov[1];
3067 struct smb2_create_rsp *create_rsp;
3068 struct smb2_ioctl_rsp *ioctl_rsp;
3069 struct reparse_data_buffer *reparse_buf;
3070 int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
3073 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3075 *target_path = NULL;
3077 if (smb3_encryption_required(tcon))
3078 flags |= CIFS_TRANSFORM_REQ;
3080 memset(rqst, 0, sizeof(rqst));
3081 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3082 memset(rsp_iov, 0, sizeof(rsp_iov));
3084 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3089 memset(&open_iov, 0, sizeof(open_iov));
3090 rqst[0].rq_iov = open_iov;
3091 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3093 memset(&oparms, 0, sizeof(oparms));
3095 oparms.desired_access = FILE_READ_ATTRIBUTES;
3096 oparms.disposition = FILE_OPEN;
3097 oparms.create_options = cifs_create_options(cifs_sb, create_options);
3099 oparms.reconnect = false;
3101 rc = SMB2_open_init(tcon, server,
3102 &rqst[0], &oplock, &oparms, utf16_path);
3105 smb2_set_next_command(tcon, &rqst[0]);
3109 memset(&io_iov, 0, sizeof(io_iov));
3110 rqst[1].rq_iov = io_iov;
3111 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3113 rc = SMB2_ioctl_init(tcon, server,
3114 &rqst[1], fid.persistent_fid,
3115 fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
3116 true /* is_fctl */, NULL, 0,
3118 MAX_SMB2_CREATE_RESPONSE_SIZE -
3119 MAX_SMB2_CLOSE_RESPONSE_SIZE);
3123 smb2_set_next_command(tcon, &rqst[1]);
3124 smb2_set_related(&rqst[1]);
3128 memset(&close_iov, 0, sizeof(close_iov));
3129 rqst[2].rq_iov = close_iov;
3130 rqst[2].rq_nvec = 1;
3132 rc = SMB2_close_init(tcon, server,
3133 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3137 smb2_set_related(&rqst[2]);
3139 rc = compound_send_recv(xid, tcon->ses, server,
3141 resp_buftype, rsp_iov);
3143 create_rsp = rsp_iov[0].iov_base;
3144 if (create_rsp && create_rsp->hdr.Status)
3145 err_iov = rsp_iov[0];
3146 ioctl_rsp = rsp_iov[1].iov_base;
3149 * Open was successful and we got an ioctl response.
3151 if ((rc == 0) && (is_reparse_point)) {
3152 /* See MS-FSCC 2.3.23 */
3154 reparse_buf = (struct reparse_data_buffer *)
3155 ((char *)ioctl_rsp +
3156 le32_to_cpu(ioctl_rsp->OutputOffset));
3157 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3159 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3160 rsp_iov[1].iov_len) {
3161 cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3167 rc = parse_reparse_point(reparse_buf, plen, target_path,
3172 if (!rc || !err_iov.iov_base) {
3177 err_buf = err_iov.iov_base;
3178 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3179 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3184 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3185 if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3186 le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3191 /* open must fail on symlink - reset rc */
3193 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3194 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3195 print_len = le16_to_cpu(symlink->PrintNameLength);
3196 print_offset = le16_to_cpu(symlink->PrintNameOffset);
3198 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3203 if (err_iov.iov_len <
3204 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3209 *target_path = cifs_strndup_from_utf16(
3210 (char *)symlink->PathBuffer + sub_offset,
3211 sub_len, true, cifs_sb->local_nls);
3212 if (!(*target_path)) {
3216 convert_delimiter(*target_path, '/');
3217 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3220 cifs_dbg(FYI, "query symlink rc %d\n", rc);
3222 SMB2_open_free(&rqst[0]);
3223 SMB2_ioctl_free(&rqst[1]);
3224 SMB2_close_free(&rqst[2]);
3225 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3226 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3227 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3232 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3233 struct cifs_sb_info *cifs_sb, const char *full_path,
3237 __le16 *utf16_path = NULL;
3238 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3239 struct cifs_open_parms oparms;
3240 struct cifs_fid fid;
3241 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3242 int flags = CIFS_CP_CREATE_CLOSE_OP;
3243 struct smb_rqst rqst[3];
3244 int resp_buftype[3];
3245 struct kvec rsp_iov[3];
3246 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3247 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3248 struct kvec close_iov[1];
3249 struct smb2_ioctl_rsp *ioctl_rsp;
3250 struct reparse_data_buffer *reparse_buf;
3253 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3255 if (smb3_encryption_required(tcon))
3256 flags |= CIFS_TRANSFORM_REQ;
3258 memset(rqst, 0, sizeof(rqst));
3259 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3260 memset(rsp_iov, 0, sizeof(rsp_iov));
3262 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3267 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3268 * to see if there is a handle already open that we can use
3270 memset(&open_iov, 0, sizeof(open_iov));
3271 rqst[0].rq_iov = open_iov;
3272 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3274 memset(&oparms, 0, sizeof(oparms));
3276 oparms.desired_access = FILE_READ_ATTRIBUTES;
3277 oparms.disposition = FILE_OPEN;
3278 oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3280 oparms.reconnect = false;
3282 rc = SMB2_open_init(tcon, server,
3283 &rqst[0], &oplock, &oparms, utf16_path);
3286 smb2_set_next_command(tcon, &rqst[0]);
3290 memset(&io_iov, 0, sizeof(io_iov));
3291 rqst[1].rq_iov = io_iov;
3292 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3294 rc = SMB2_ioctl_init(tcon, server,
3295 &rqst[1], COMPOUND_FID,
3296 COMPOUND_FID, FSCTL_GET_REPARSE_POINT,
3297 true /* is_fctl */, NULL, 0,
3299 MAX_SMB2_CREATE_RESPONSE_SIZE -
3300 MAX_SMB2_CLOSE_RESPONSE_SIZE);
3304 smb2_set_next_command(tcon, &rqst[1]);
3305 smb2_set_related(&rqst[1]);
3309 memset(&close_iov, 0, sizeof(close_iov));
3310 rqst[2].rq_iov = close_iov;
3311 rqst[2].rq_nvec = 1;
3313 rc = SMB2_close_init(tcon, server,
3314 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3318 smb2_set_related(&rqst[2]);
3320 rc = compound_send_recv(xid, tcon->ses, server,
3322 resp_buftype, rsp_iov);
3324 ioctl_rsp = rsp_iov[1].iov_base;
3327 * Open was successful and we got an ioctl response.
3330 /* See MS-FSCC 2.3.23 */
3332 reparse_buf = (struct reparse_data_buffer *)
3333 ((char *)ioctl_rsp +
3334 le32_to_cpu(ioctl_rsp->OutputOffset));
3335 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3337 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3338 rsp_iov[1].iov_len) {
3339 cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3344 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3349 SMB2_open_free(&rqst[0]);
3350 SMB2_ioctl_free(&rqst[1]);
3351 SMB2_close_free(&rqst[2]);
3352 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3353 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3354 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3358 static struct cifs_ntsd *
3359 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3360 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3362 struct cifs_ntsd *pntsd = NULL;
3364 int rc = -EOPNOTSUPP;
3365 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3368 return ERR_CAST(tlink);
3371 cifs_dbg(FYI, "trying to get acl\n");
3373 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3374 cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3378 cifs_put_tlink(tlink);
3380 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3387 static struct cifs_ntsd *
3388 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3389 const char *path, u32 *pacllen, u32 info)
3391 struct cifs_ntsd *pntsd = NULL;
3392 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3395 struct cifs_tcon *tcon;
3396 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3397 struct cifs_fid fid;
3398 struct cifs_open_parms oparms;
3401 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3403 return ERR_CAST(tlink);
3405 tcon = tlink_tcon(tlink);
3408 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3416 oparms.desired_access = READ_CONTROL;
3417 oparms.disposition = FILE_OPEN;
3419 * When querying an ACL, even if the file is a symlink we want to open
3420 * the source not the target, and so the protocol requires that the
3421 * client specify this flag when opening a reparse point
3423 oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3425 oparms.reconnect = false;
3427 if (info & SACL_SECINFO)
3428 oparms.desired_access |= SYSTEM_SECURITY;
3430 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3434 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3435 fid.volatile_fid, (void **)&pntsd, pacllen,
3437 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3440 cifs_put_tlink(tlink);
3443 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3450 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3451 struct inode *inode, const char *path, int aclflag)
3453 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3455 int rc, access_flags = 0;
3456 struct cifs_tcon *tcon;
3457 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3458 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3459 struct cifs_fid fid;
3460 struct cifs_open_parms oparms;
3463 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3465 return PTR_ERR(tlink);
3467 tcon = tlink_tcon(tlink);
3470 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3471 access_flags |= WRITE_OWNER;
3472 if (aclflag & CIFS_ACL_SACL)
3473 access_flags |= SYSTEM_SECURITY;
3474 if (aclflag & CIFS_ACL_DACL)
3475 access_flags |= WRITE_DAC;
3477 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3485 oparms.desired_access = access_flags;
3486 oparms.create_options = cifs_create_options(cifs_sb, 0);
3487 oparms.disposition = FILE_OPEN;
3490 oparms.reconnect = false;
3492 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3496 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3497 fid.volatile_fid, pnntsd, acllen, aclflag);
3498 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3501 cifs_put_tlink(tlink);
3506 /* Retrieve an ACL from the server */
3507 static struct cifs_ntsd *
3508 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3509 struct inode *inode, const char *path,
3510 u32 *pacllen, u32 info)
3512 struct cifs_ntsd *pntsd = NULL;
3513 struct cifsFileInfo *open_file = NULL;
3515 if (inode && !(info & SACL_SECINFO))
3516 open_file = find_readable_file(CIFS_I(inode), true);
3517 if (!open_file || (info & SACL_SECINFO))
3518 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3520 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3521 cifsFileInfo_put(open_file);
3525 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3526 loff_t offset, loff_t len, bool keep_size)
3528 struct cifs_ses *ses = tcon->ses;
3529 struct inode *inode;
3530 struct cifsInodeInfo *cifsi;
3531 struct cifsFileInfo *cfile = file->private_data;
3532 struct file_zero_data_information fsctl_buf;
3539 inode = d_inode(cfile->dentry);
3540 cifsi = CIFS_I(inode);
3542 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3543 ses->Suid, offset, len);
3546 * We zero the range through ioctl, so we need remove the page caches
3547 * first, otherwise the data may be inconsistent with the server.
3549 truncate_pagecache_range(inode, offset, offset + len - 1);
3551 /* if file not oplocked can't be sure whether asking to extend size */
3552 if (!CIFS_CACHE_READ(cifsi))
3553 if (keep_size == false) {
3555 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3556 tcon->tid, ses->Suid, offset, len, rc);
3561 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3563 fsctl_buf.FileOffset = cpu_to_le64(offset);
3564 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3566 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3567 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3569 sizeof(struct file_zero_data_information),
3572 goto zero_range_exit;
3575 * do we also need to change the size of the file?
3577 if (keep_size == false && i_size_read(inode) < offset + len) {
3578 eof = cpu_to_le64(offset + len);
3579 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3580 cfile->fid.volatile_fid, cfile->pid, &eof);
3586 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3587 ses->Suid, offset, len, rc);
3589 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3590 ses->Suid, offset, len);
3594 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3595 loff_t offset, loff_t len)
3597 struct inode *inode;
3598 struct cifsFileInfo *cfile = file->private_data;
3599 struct file_zero_data_information fsctl_buf;
3602 __u8 set_sparse = 1;
3606 inode = d_inode(cfile->dentry);
3608 /* Need to make file sparse, if not already, before freeing range. */
3609 /* Consider adding equivalent for compressed since it could also work */
3610 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3616 filemap_invalidate_lock(inode->i_mapping);
3618 * We implement the punch hole through ioctl, so we need remove the page
3619 * caches first, otherwise the data may be inconsistent with the server.
3621 truncate_pagecache_range(inode, offset, offset + len - 1);
3623 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3625 fsctl_buf.FileOffset = cpu_to_le64(offset);
3626 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3628 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3629 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3630 true /* is_fctl */, (char *)&fsctl_buf,
3631 sizeof(struct file_zero_data_information),
3632 CIFSMaxBufSize, NULL, NULL);
3634 filemap_invalidate_unlock(inode->i_mapping);
3638 static int smb3_simple_fallocate_write_range(unsigned int xid,
3639 struct cifs_tcon *tcon,
3640 struct cifsFileInfo *cfile,
3641 loff_t off, loff_t len,
3644 struct cifs_io_parms io_parms = {0};
3649 io_parms.netfid = cfile->fid.netfid;
3650 io_parms.pid = current->tgid;
3651 io_parms.tcon = tcon;
3652 io_parms.persistent_fid = cfile->fid.persistent_fid;
3653 io_parms.volatile_fid = cfile->fid.volatile_fid;
3656 io_parms.offset = off;
3657 io_parms.length = len;
3658 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3659 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3660 /* iov[0] is reserved for smb header */
3661 iov[1].iov_base = buf;
3662 iov[1].iov_len = io_parms.length;
3663 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3675 static int smb3_simple_fallocate_range(unsigned int xid,
3676 struct cifs_tcon *tcon,
3677 struct cifsFileInfo *cfile,
3678 loff_t off, loff_t len)
3680 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3686 in_data.file_offset = cpu_to_le64(off);
3687 in_data.length = cpu_to_le64(len);
3688 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3689 cfile->fid.volatile_fid,
3690 FSCTL_QUERY_ALLOCATED_RANGES, true,
3691 (char *)&in_data, sizeof(in_data),
3692 1024 * sizeof(struct file_allocated_range_buffer),
3693 (char **)&out_data, &out_data_len);
3697 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3703 tmp_data = out_data;
3706 * The rest of the region is unmapped so write it all.
3708 if (out_data_len == 0) {
3709 rc = smb3_simple_fallocate_write_range(xid, tcon,
3710 cfile, off, len, buf);
3714 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3719 if (off < le64_to_cpu(tmp_data->file_offset)) {
3721 * We are at a hole. Write until the end of the region
3722 * or until the next allocated data,
3723 * whichever comes next.
3725 l = le64_to_cpu(tmp_data->file_offset) - off;
3728 rc = smb3_simple_fallocate_write_range(xid, tcon,
3729 cfile, off, l, buf);
3738 * We are at a section of allocated data, just skip forward
3739 * until the end of the data or the end of the region
3740 * we are supposed to fallocate, whichever comes first.
3742 l = le64_to_cpu(tmp_data->length);
3748 tmp_data = &tmp_data[1];
3749 out_data_len -= sizeof(struct file_allocated_range_buffer);
3759 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3760 loff_t off, loff_t len, bool keep_size)
3762 struct inode *inode;
3763 struct cifsInodeInfo *cifsi;
3764 struct cifsFileInfo *cfile = file->private_data;
3765 long rc = -EOPNOTSUPP;
3771 inode = d_inode(cfile->dentry);
3772 cifsi = CIFS_I(inode);
3774 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3775 tcon->ses->Suid, off, len);
3776 /* if file not oplocked can't be sure whether asking to extend size */
3777 if (!CIFS_CACHE_READ(cifsi))
3778 if (keep_size == false) {
3779 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3780 tcon->tid, tcon->ses->Suid, off, len, rc);
3786 * Extending the file
3788 if ((keep_size == false) && i_size_read(inode) < off + len) {
3789 rc = inode_newsize_ok(inode, off + len);
3793 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3794 smb2_set_sparse(xid, tcon, cfile, inode, false);
3796 eof = cpu_to_le64(off + len);
3797 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3798 cfile->fid.volatile_fid, cfile->pid, &eof);
3800 cifsi->server_eof = off + len;
3801 cifs_setsize(inode, off + len);
3802 cifs_truncate_page(inode->i_mapping, inode->i_size);
3803 truncate_setsize(inode, off + len);
3809 * Files are non-sparse by default so falloc may be a no-op
3810 * Must check if file sparse. If not sparse, and since we are not
3811 * extending then no need to do anything since file already allocated
3813 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3818 if (keep_size == true) {
3820 * We can not preallocate pages beyond the end of the file
3823 if (off >= i_size_read(inode)) {
3828 * For fallocates that are partially beyond the end of file,
3829 * clamp len so we only fallocate up to the end of file.
3831 if (off + len > i_size_read(inode)) {
3832 len = i_size_read(inode) - off;
3836 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3838 * At this point, we are trying to fallocate an internal
3839 * regions of a sparse file. Since smb2 does not have a
3840 * fallocate command we have two otions on how to emulate this.
3841 * We can either turn the entire file to become non-sparse
3842 * which we only do if the fallocate is for virtually
3843 * the whole file, or we can overwrite the region with zeroes
3844 * using SMB2_write, which could be prohibitevly expensive
3848 * We are only trying to fallocate a small region so
3849 * just write it with zero.
3851 if (len <= 1024 * 1024) {
3852 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3858 * Check if falloc starts within first few pages of file
3859 * and ends within a few pages of the end of file to
3860 * ensure that most of file is being forced to be
3861 * fallocated now. If so then setting whole file sparse
3862 * ie potentially making a few extra pages at the beginning
3863 * or end of the file non-sparse via set_sparse is harmless.
3865 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3871 smb2_set_sparse(xid, tcon, cfile, inode, false);
3876 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3877 tcon->ses->Suid, off, len, rc);
3879 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3880 tcon->ses->Suid, off, len);
3886 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3887 loff_t off, loff_t len)
3891 struct inode *inode;
3892 struct cifsFileInfo *cfile = file->private_data;
3893 struct cifsInodeInfo *cifsi;
3898 inode = d_inode(cfile->dentry);
3899 cifsi = CIFS_I(inode);
3901 if (off >= i_size_read(inode) ||
3902 off + len >= i_size_read(inode)) {
3907 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3908 i_size_read(inode) - off - len, off);
3912 eof = cpu_to_le64(i_size_read(inode) - len);
3913 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3914 cfile->fid.volatile_fid, cfile->pid, &eof);
3920 cifsi->server_eof = i_size_read(inode) - len;
3921 truncate_setsize(inode, cifsi->server_eof);
3922 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3928 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3929 loff_t off, loff_t len)
3933 struct cifsFileInfo *cfile = file->private_data;
3939 if (off >= i_size_read(file->f_inode)) {
3944 count = i_size_read(file->f_inode) - off;
3945 eof = cpu_to_le64(i_size_read(file->f_inode) + len);
3947 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3948 cfile->fid.volatile_fid, cfile->pid, &eof);
3952 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3956 rc = smb3_zero_range(file, tcon, off, len, 1);
3966 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3968 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3969 struct cifsInodeInfo *cifsi;
3970 struct inode *inode;
3972 struct file_allocated_range_buffer in_data, *out_data = NULL;
3976 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3977 return generic_file_llseek(file, offset, whence);
3979 inode = d_inode(cfile->dentry);
3980 cifsi = CIFS_I(inode);
3982 if (offset < 0 || offset >= i_size_read(inode))
3987 * We need to be sure that all dirty pages are written as they
3988 * might fill holes on the server.
3989 * Note that we also MUST flush any written pages since at least
3990 * some servers (Windows2016) will not reflect recent writes in
3991 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3993 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3995 filemap_write_and_wait(inode->i_mapping);
3996 smb2_flush_file(xid, tcon, &wrcfile->fid);
3997 cifsFileInfo_put(wrcfile);
4000 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
4001 if (whence == SEEK_HOLE)
4002 offset = i_size_read(inode);
4006 in_data.file_offset = cpu_to_le64(offset);
4007 in_data.length = cpu_to_le64(i_size_read(inode));
4009 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
4010 cfile->fid.volatile_fid,
4011 FSCTL_QUERY_ALLOCATED_RANGES, true,
4012 (char *)&in_data, sizeof(in_data),
4013 sizeof(struct file_allocated_range_buffer),
4014 (char **)&out_data, &out_data_len);
4020 if (whence == SEEK_HOLE && out_data_len == 0)
4023 if (whence == SEEK_DATA && out_data_len == 0) {
4028 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
4032 if (whence == SEEK_DATA) {
4033 offset = le64_to_cpu(out_data->file_offset);
4036 if (offset < le64_to_cpu(out_data->file_offset))
4039 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
4045 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
4050 static int smb3_fiemap(struct cifs_tcon *tcon,
4051 struct cifsFileInfo *cfile,
4052 struct fiemap_extent_info *fei, u64 start, u64 len)
4055 struct file_allocated_range_buffer in_data, *out_data;
4057 int i, num, rc, flags, last_blob;
4060 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
4066 in_data.file_offset = cpu_to_le64(start);
4067 in_data.length = cpu_to_le64(len);
4069 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
4070 cfile->fid.volatile_fid,
4071 FSCTL_QUERY_ALLOCATED_RANGES, true,
4072 (char *)&in_data, sizeof(in_data),
4073 1024 * sizeof(struct file_allocated_range_buffer),
4074 (char **)&out_data, &out_data_len);
4083 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
4087 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
4092 num = out_data_len / sizeof(struct file_allocated_range_buffer);
4093 for (i = 0; i < num; i++) {
4095 if (i == num - 1 && last_blob)
4096 flags |= FIEMAP_EXTENT_LAST;
4098 rc = fiemap_fill_next_extent(fei,
4099 le64_to_cpu(out_data[i].file_offset),
4100 le64_to_cpu(out_data[i].file_offset),
4101 le64_to_cpu(out_data[i].length),
4112 next = le64_to_cpu(out_data[num - 1].file_offset) +
4113 le64_to_cpu(out_data[num - 1].length);
4114 len = len - (next - start);
4125 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
4126 loff_t off, loff_t len)
4128 /* KEEP_SIZE already checked for by do_fallocate */
4129 if (mode & FALLOC_FL_PUNCH_HOLE)
4130 return smb3_punch_hole(file, tcon, off, len);
4131 else if (mode & FALLOC_FL_ZERO_RANGE) {
4132 if (mode & FALLOC_FL_KEEP_SIZE)
4133 return smb3_zero_range(file, tcon, off, len, true);
4134 return smb3_zero_range(file, tcon, off, len, false);
4135 } else if (mode == FALLOC_FL_KEEP_SIZE)
4136 return smb3_simple_falloc(file, tcon, off, len, true);
4137 else if (mode == FALLOC_FL_COLLAPSE_RANGE)
4138 return smb3_collapse_range(file, tcon, off, len);
4139 else if (mode == FALLOC_FL_INSERT_RANGE)
4140 return smb3_insert_range(file, tcon, off, len);
4142 return smb3_simple_falloc(file, tcon, off, len, false);
4148 smb2_downgrade_oplock(struct TCP_Server_Info *server,
4149 struct cifsInodeInfo *cinode, __u32 oplock,
4150 unsigned int epoch, bool *purge_cache)
4152 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
4156 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4157 unsigned int epoch, bool *purge_cache);
4160 smb3_downgrade_oplock(struct TCP_Server_Info *server,
4161 struct cifsInodeInfo *cinode, __u32 oplock,
4162 unsigned int epoch, bool *purge_cache)
4164 unsigned int old_state = cinode->oplock;
4165 unsigned int old_epoch = cinode->epoch;
4166 unsigned int new_state;
4168 if (epoch > old_epoch) {
4169 smb21_set_oplock_level(cinode, oplock, 0, NULL);
4170 cinode->epoch = epoch;
4173 new_state = cinode->oplock;
4174 *purge_cache = false;
4176 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
4177 (new_state & CIFS_CACHE_READ_FLG) == 0)
4178 *purge_cache = true;
4179 else if (old_state == new_state && (epoch - old_epoch > 1))
4180 *purge_cache = true;
4184 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4185 unsigned int epoch, bool *purge_cache)
4188 cinode->lease_granted = false;
4189 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4191 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4192 cinode->oplock = CIFS_CACHE_RHW_FLG;
4193 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4194 &cinode->vfs_inode);
4195 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4196 cinode->oplock = CIFS_CACHE_RW_FLG;
4197 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4198 &cinode->vfs_inode);
4199 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4200 cinode->oplock = CIFS_CACHE_READ_FLG;
4201 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4202 &cinode->vfs_inode);
4208 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4209 unsigned int epoch, bool *purge_cache)
4211 char message[5] = {0};
4212 unsigned int new_oplock = 0;
4215 cinode->lease_granted = true;
4216 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4219 /* Check if the server granted an oplock rather than a lease */
4220 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4221 return smb2_set_oplock_level(cinode, oplock, epoch,
4224 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4225 new_oplock |= CIFS_CACHE_READ_FLG;
4226 strcat(message, "R");
4228 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4229 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4230 strcat(message, "H");
4232 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4233 new_oplock |= CIFS_CACHE_WRITE_FLG;
4234 strcat(message, "W");
4237 strncpy(message, "None", sizeof(message));
4239 cinode->oplock = new_oplock;
4240 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4241 &cinode->vfs_inode);
4245 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4246 unsigned int epoch, bool *purge_cache)
4248 unsigned int old_oplock = cinode->oplock;
4250 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4253 *purge_cache = false;
4254 if (old_oplock == CIFS_CACHE_READ_FLG) {
4255 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4256 (epoch - cinode->epoch > 0))
4257 *purge_cache = true;
4258 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4259 (epoch - cinode->epoch > 1))
4260 *purge_cache = true;
4261 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4262 (epoch - cinode->epoch > 1))
4263 *purge_cache = true;
4264 else if (cinode->oplock == 0 &&
4265 (epoch - cinode->epoch > 0))
4266 *purge_cache = true;
4267 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4268 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4269 (epoch - cinode->epoch > 0))
4270 *purge_cache = true;
4271 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4272 (epoch - cinode->epoch > 1))
4273 *purge_cache = true;
4275 cinode->epoch = epoch;
4280 smb2_is_read_op(__u32 oplock)
4282 return oplock == SMB2_OPLOCK_LEVEL_II;
4286 smb21_is_read_op(__u32 oplock)
4288 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4289 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4293 map_oplock_to_lease(u8 oplock)
4295 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4296 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
4297 else if (oplock == SMB2_OPLOCK_LEVEL_II)
4298 return SMB2_LEASE_READ_CACHING;
4299 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4300 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
4301 SMB2_LEASE_WRITE_CACHING;
4306 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4308 struct create_lease *buf;
4310 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4314 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4315 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4317 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4318 (struct create_lease, lcontext));
4319 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4320 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4321 (struct create_lease, Name));
4322 buf->ccontext.NameLength = cpu_to_le16(4);
4323 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4332 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4334 struct create_lease_v2 *buf;
4336 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4340 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4341 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4343 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4344 (struct create_lease_v2, lcontext));
4345 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4346 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4347 (struct create_lease_v2, Name));
4348 buf->ccontext.NameLength = cpu_to_le16(4);
4349 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4358 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4360 struct create_lease *lc = (struct create_lease *)buf;
4362 *epoch = 0; /* not used */
4363 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4364 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4365 return le32_to_cpu(lc->lcontext.LeaseState);
4369 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4371 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4373 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4374 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4375 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4377 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4378 return le32_to_cpu(lc->lcontext.LeaseState);
4382 smb2_wp_retry_size(struct inode *inode)
4384 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4385 SMB2_MAX_BUFFER_SIZE);
4389 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4391 return !cfile->invalidHandle;
4395 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4396 struct smb_rqst *old_rq, __le16 cipher_type)
4398 struct smb2_hdr *shdr =
4399 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4401 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4402 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4403 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4404 tr_hdr->Flags = cpu_to_le16(0x01);
4405 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4406 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4407 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4409 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4410 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4413 /* We can not use the normal sg_set_buf() as we will sometimes pass a
4414 * stack object as buf.
4416 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
4417 unsigned int buflen)
4421 * VMAP_STACK (at least) puts stack into the vmalloc address space
4423 if (is_vmalloc_addr(buf))
4424 addr = vmalloc_to_page(buf);
4426 addr = virt_to_page(buf);
4427 sg_set_page(sg, addr, buflen, offset_in_page(buf));
4430 /* Assumes the first rqst has a transform header as the first iov.
4432 * rqst[0].rq_iov[0] is transform header
4433 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4434 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4436 static struct scatterlist *
4437 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
4439 unsigned int sg_len;
4440 struct scatterlist *sg;
4443 unsigned int idx = 0;
4447 for (i = 0; i < num_rqst; i++)
4448 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
4450 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
4454 sg_init_table(sg, sg_len);
4455 for (i = 0; i < num_rqst; i++) {
4456 for (j = 0; j < rqst[i].rq_nvec; j++) {
4458 * The first rqst has a transform header where the
4459 * first 20 bytes are not part of the encrypted blob
4461 skip = (i == 0) && (j == 0) ? 20 : 0;
4462 smb2_sg_set_buf(&sg[idx++],
4463 rqst[i].rq_iov[j].iov_base + skip,
4464 rqst[i].rq_iov[j].iov_len - skip);
4467 for (j = 0; j < rqst[i].rq_npages; j++) {
4468 unsigned int len, offset;
4470 rqst_page_get_length(&rqst[i], j, &len, &offset);
4471 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
4474 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
4479 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4481 struct cifs_ses *ses;
4484 spin_lock(&cifs_tcp_ses_lock);
4485 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4486 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4487 if (ses->Suid == ses_id) {
4488 ses_enc_key = enc ? ses->smb3encryptionkey :
4489 ses->smb3decryptionkey;
4490 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4491 spin_unlock(&cifs_tcp_ses_lock);
4496 spin_unlock(&cifs_tcp_ses_lock);
4501 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4502 * iov[0] - transform header (associate data),
4503 * iov[1-N] - SMB2 header and pages - data to encrypt.
4504 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4508 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4509 struct smb_rqst *rqst, int enc)
4511 struct smb2_transform_hdr *tr_hdr =
4512 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4513 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4515 struct scatterlist *sg;
4516 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4517 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4518 struct aead_request *req;
4520 unsigned int iv_len;
4521 DECLARE_CRYPTO_WAIT(wait);
4522 struct crypto_aead *tfm;
4523 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4525 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4527 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4532 rc = smb3_crypto_aead_allocate(server);
4534 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4538 tfm = enc ? server->secmech.ccmaesencrypt :
4539 server->secmech.ccmaesdecrypt;
4541 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4542 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4543 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4545 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4548 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4552 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4554 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4558 req = aead_request_alloc(tfm, GFP_KERNEL);
4560 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
4565 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4566 crypt_len += SMB2_SIGNATURE_SIZE;
4569 sg = init_sg(num_rqst, rqst, sign);
4571 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
4576 iv_len = crypto_aead_ivsize(tfm);
4577 iv = kzalloc(iv_len, GFP_KERNEL);
4579 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
4584 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4585 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4586 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4589 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4592 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4593 aead_request_set_ad(req, assoc_data_len);
4595 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4596 crypto_req_done, &wait);
4598 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4599 : crypto_aead_decrypt(req), &wait);
4602 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4613 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4617 for (i = 0; i < num_rqst; i++) {
4618 if (rqst[i].rq_pages) {
4619 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4620 put_page(rqst[i].rq_pages[j]);
4621 kfree(rqst[i].rq_pages);
4627 * This function will initialize new_rq and encrypt the content.
4628 * The first entry, new_rq[0], only contains a single iov which contains
4629 * a smb2_transform_hdr and is pre-allocated by the caller.
4630 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4632 * The end result is an array of smb_rqst structures where the first structure
4633 * only contains a single iov for the transform header which we then can pass
4634 * to crypt_message().
4636 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4637 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4640 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4641 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4643 struct page **pages;
4644 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4645 unsigned int npages;
4646 unsigned int orig_len = 0;
4650 for (i = 1; i < num_rqst; i++) {
4651 npages = old_rq[i - 1].rq_npages;
4652 pages = kmalloc_array(npages, sizeof(struct page *),
4657 new_rq[i].rq_pages = pages;
4658 new_rq[i].rq_npages = npages;
4659 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4660 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4661 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4662 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4663 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4665 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4667 for (j = 0; j < npages; j++) {
4668 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4673 /* copy pages form the old */
4674 for (j = 0; j < npages; j++) {
4676 unsigned int offset, len;
4678 rqst_page_get_length(&new_rq[i], j, &len, &offset);
4680 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4681 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4683 memcpy(dst, src, len);
4684 kunmap(new_rq[i].rq_pages[j]);
4685 kunmap(old_rq[i - 1].rq_pages[j]);
4689 /* fill the 1st iov with a transform header */
4690 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4692 rc = crypt_message(server, num_rqst, new_rq, 1);
4693 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4700 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4705 smb3_is_transform_hdr(void *buf)
4707 struct smb2_transform_hdr *trhdr = buf;
4709 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4713 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4714 unsigned int buf_data_size, struct page **pages,
4715 unsigned int npages, unsigned int page_data_size,
4719 struct smb_rqst rqst = {NULL};
4722 iov[0].iov_base = buf;
4723 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4724 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4725 iov[1].iov_len = buf_data_size;
4729 rqst.rq_pages = pages;
4730 rqst.rq_npages = npages;
4731 rqst.rq_pagesz = PAGE_SIZE;
4732 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4734 rc = crypt_message(server, 1, &rqst, 0);
4735 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4740 memmove(buf, iov[1].iov_base, buf_data_size);
4743 server->total_read = buf_data_size + page_data_size;
4749 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4750 unsigned int npages, unsigned int len)
4755 for (i = 0; i < npages; i++) {
4756 struct page *page = pages[i];
4760 if (len >= PAGE_SIZE) {
4761 /* enough data to fill the page */
4765 zero_user(page, len, PAGE_SIZE - len);
4768 length = cifs_read_page_from_socket(server, page, 0, n);
4771 server->total_read += length;
4778 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4779 unsigned int cur_off, struct bio_vec **page_vec)
4781 struct bio_vec *bvec;
4784 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4788 for (i = 0; i < npages; i++) {
4789 bvec[i].bv_page = pages[i];
4790 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4791 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4792 data_size -= bvec[i].bv_len;
4795 if (data_size != 0) {
4796 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4806 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4807 char *buf, unsigned int buf_len, struct page **pages,
4808 unsigned int npages, unsigned int page_data_size,
4811 unsigned int data_offset;
4812 unsigned int data_len;
4813 unsigned int cur_off;
4814 unsigned int cur_page_idx;
4815 unsigned int pad_len;
4816 struct cifs_readdata *rdata = mid->callback_data;
4817 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4818 struct bio_vec *bvec = NULL;
4819 struct iov_iter iter;
4822 bool use_rdma_mr = false;
4824 if (shdr->Command != SMB2_READ) {
4825 cifs_server_dbg(VFS, "only big read responses are supported\n");
4829 if (server->ops->is_session_expired &&
4830 server->ops->is_session_expired(buf)) {
4832 cifs_reconnect(server, true);
4836 if (server->ops->is_status_pending &&
4837 server->ops->is_status_pending(buf, server))
4840 /* set up first two iov to get credits */
4841 rdata->iov[0].iov_base = buf;
4842 rdata->iov[0].iov_len = 0;
4843 rdata->iov[1].iov_base = buf;
4844 rdata->iov[1].iov_len =
4845 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4846 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4847 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4848 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4849 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4851 rdata->result = server->ops->map_error(buf, true);
4852 if (rdata->result != 0) {
4853 cifs_dbg(FYI, "%s: server returned error %d\n",
4854 __func__, rdata->result);
4855 /* normal error on read response */
4857 mid->mid_state = MID_RESPONSE_RECEIVED;
4859 dequeue_mid(mid, false);
4863 data_offset = server->ops->read_data_offset(buf);
4864 #ifdef CONFIG_CIFS_SMB_DIRECT
4865 use_rdma_mr = rdata->mr;
4867 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4869 if (data_offset < server->vals->read_rsp_size) {
4871 * win2k8 sometimes sends an offset of 0 when the read
4872 * is beyond the EOF. Treat it as if the data starts just after
4875 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4876 __func__, data_offset);
4877 data_offset = server->vals->read_rsp_size;
4878 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4879 /* data_offset is beyond the end of smallbuf */
4880 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4881 __func__, data_offset);
4882 rdata->result = -EIO;
4884 mid->mid_state = MID_RESPONSE_MALFORMED;
4886 dequeue_mid(mid, rdata->result);
4890 pad_len = data_offset - server->vals->read_rsp_size;
4892 if (buf_len <= data_offset) {
4893 /* read response payload is in pages */
4894 cur_page_idx = pad_len / PAGE_SIZE;
4895 cur_off = pad_len % PAGE_SIZE;
4897 if (cur_page_idx != 0) {
4898 /* data offset is beyond the 1st page of response */
4899 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4900 __func__, data_offset);
4901 rdata->result = -EIO;
4903 mid->mid_state = MID_RESPONSE_MALFORMED;
4905 dequeue_mid(mid, rdata->result);
4909 if (data_len > page_data_size - pad_len) {
4910 /* data_len is corrupt -- discard frame */
4911 rdata->result = -EIO;
4913 mid->mid_state = MID_RESPONSE_MALFORMED;
4915 dequeue_mid(mid, rdata->result);
4919 rdata->result = init_read_bvec(pages, npages, page_data_size,
4921 if (rdata->result != 0) {
4923 mid->mid_state = MID_RESPONSE_MALFORMED;
4925 dequeue_mid(mid, rdata->result);
4929 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4930 } else if (buf_len >= data_offset + data_len) {
4931 /* read response payload is in buf */
4932 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4933 iov.iov_base = buf + data_offset;
4934 iov.iov_len = data_len;
4935 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4937 /* read response payload cannot be in both buf and pages */
4938 WARN_ONCE(1, "buf can not contain only a part of read data");
4939 rdata->result = -EIO;
4941 mid->mid_state = MID_RESPONSE_MALFORMED;
4943 dequeue_mid(mid, rdata->result);
4947 length = rdata->copy_into_pages(server, rdata, &iter);
4955 mid->mid_state = MID_RESPONSE_RECEIVED;
4957 dequeue_mid(mid, false);
4961 struct smb2_decrypt_work {
4962 struct work_struct decrypt;
4963 struct TCP_Server_Info *server;
4964 struct page **ppages;
4966 unsigned int npages;
4971 static void smb2_decrypt_offload(struct work_struct *work)
4973 struct smb2_decrypt_work *dw = container_of(work,
4974 struct smb2_decrypt_work, decrypt);
4976 struct mid_q_entry *mid;
4978 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4979 dw->ppages, dw->npages, dw->len, true);
4981 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4985 dw->server->lstrp = jiffies;
4986 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4988 cifs_dbg(FYI, "mid not found\n");
4990 mid->decrypted = true;
4991 rc = handle_read_data(dw->server, mid, dw->buf,
4992 dw->server->vals->read_rsp_size,
4993 dw->ppages, dw->npages, dw->len,
4996 #ifdef CONFIG_CIFS_STATS2
4997 mid->when_received = jiffies;
4999 if (dw->server->ops->is_network_name_deleted)
5000 dw->server->ops->is_network_name_deleted(dw->buf,
5005 spin_lock(&cifs_tcp_ses_lock);
5006 spin_lock(&GlobalMid_Lock);
5007 if (dw->server->tcpStatus == CifsNeedReconnect) {
5008 mid->mid_state = MID_RETRY_NEEDED;
5009 spin_unlock(&GlobalMid_Lock);
5010 spin_unlock(&cifs_tcp_ses_lock);
5013 mid->mid_state = MID_REQUEST_SUBMITTED;
5014 mid->mid_flags &= ~(MID_DELETED);
5015 list_add_tail(&mid->qhead,
5016 &dw->server->pending_mid_q);
5017 spin_unlock(&GlobalMid_Lock);
5018 spin_unlock(&cifs_tcp_ses_lock);
5021 cifs_mid_q_entry_release(mid);
5025 for (i = dw->npages-1; i >= 0; i--)
5026 put_page(dw->ppages[i]);
5029 cifs_small_buf_release(dw->buf);
5035 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
5038 char *buf = server->smallbuf;
5039 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5040 unsigned int npages;
5041 struct page **pages;
5043 unsigned int buflen = server->pdu_size;
5046 struct smb2_decrypt_work *dw;
5049 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
5050 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
5052 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
5055 server->total_read += rc;
5057 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
5058 server->vals->read_rsp_size;
5059 npages = DIV_ROUND_UP(len, PAGE_SIZE);
5061 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
5067 for (; i < npages; i++) {
5068 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
5075 /* read read data into pages */
5076 rc = read_data_into_pages(server, pages, npages, len);
5080 rc = cifs_discard_remaining_data(server);
5085 * For large reads, offload to different thread for better performance,
5086 * use more cores decrypting which can be expensive
5089 if ((server->min_offload) && (server->in_flight > 1) &&
5090 (server->pdu_size >= server->min_offload)) {
5091 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
5093 goto non_offloaded_decrypt;
5095 dw->buf = server->smallbuf;
5096 server->smallbuf = (char *)cifs_small_buf_get();
5098 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
5100 dw->npages = npages;
5101 dw->server = server;
5104 queue_work(decrypt_wq, &dw->decrypt);
5105 *num_mids = 0; /* worker thread takes care of finding mid */
5109 non_offloaded_decrypt:
5110 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
5111 pages, npages, len, false);
5115 *mid = smb2_find_mid(server, buf);
5117 cifs_dbg(FYI, "mid not found\n");
5119 cifs_dbg(FYI, "mid found\n");
5120 (*mid)->decrypted = true;
5121 rc = handle_read_data(server, *mid, buf,
5122 server->vals->read_rsp_size,
5123 pages, npages, len, false);
5125 if (server->ops->is_network_name_deleted) {
5126 server->ops->is_network_name_deleted(buf,
5133 for (i = i - 1; i >= 0; i--)
5138 cifs_discard_remaining_data(server);
5143 receive_encrypted_standard(struct TCP_Server_Info *server,
5144 struct mid_q_entry **mids, char **bufs,
5148 char *buf = server->smallbuf;
5149 struct smb2_hdr *shdr;
5150 unsigned int pdu_length = server->pdu_size;
5151 unsigned int buf_size;
5152 struct mid_q_entry *mid_entry;
5154 char *next_buffer = NULL;
5158 /* switch to large buffer if too big for a small one */
5159 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
5160 server->large_buf = true;
5161 memcpy(server->bigbuf, buf, server->total_read);
5162 buf = server->bigbuf;
5165 /* now read the rest */
5166 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
5167 pdu_length - HEADER_SIZE(server) + 1);
5170 server->total_read += length;
5172 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
5173 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
5177 next_is_large = server->large_buf;
5179 shdr = (struct smb2_hdr *)buf;
5180 if (shdr->NextCommand) {
5182 next_buffer = (char *)cifs_buf_get();
5184 next_buffer = (char *)cifs_small_buf_get();
5186 buf + le32_to_cpu(shdr->NextCommand),
5187 pdu_length - le32_to_cpu(shdr->NextCommand));
5190 mid_entry = smb2_find_mid(server, buf);
5191 if (mid_entry == NULL)
5192 cifs_dbg(FYI, "mid not found\n");
5194 cifs_dbg(FYI, "mid found\n");
5195 mid_entry->decrypted = true;
5196 mid_entry->resp_buf_size = server->pdu_size;
5199 if (*num_mids >= MAX_COMPOUND) {
5200 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5203 bufs[*num_mids] = buf;
5204 mids[(*num_mids)++] = mid_entry;
5206 if (mid_entry && mid_entry->handle)
5207 ret = mid_entry->handle(server, mid_entry);
5209 ret = cifs_handle_standard(server, mid_entry);
5211 if (ret == 0 && shdr->NextCommand) {
5212 pdu_length -= le32_to_cpu(shdr->NextCommand);
5213 server->large_buf = next_is_large;
5215 server->bigbuf = buf = next_buffer;
5217 server->smallbuf = buf = next_buffer;
5219 } else if (ret != 0) {
5221 * ret != 0 here means that we didn't get to handle_mid() thus
5222 * server->smallbuf and server->bigbuf are still valid. We need
5223 * to free next_buffer because it is not going to be used
5227 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5229 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5236 smb3_receive_transform(struct TCP_Server_Info *server,
5237 struct mid_q_entry **mids, char **bufs, int *num_mids)
5239 char *buf = server->smallbuf;
5240 unsigned int pdu_length = server->pdu_size;
5241 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5242 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5244 if (pdu_length < sizeof(struct smb2_transform_hdr) +
5245 sizeof(struct smb2_hdr)) {
5246 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5248 cifs_reconnect(server, true);
5249 return -ECONNABORTED;
5252 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5253 cifs_server_dbg(VFS, "Transform message is broken\n");
5254 cifs_reconnect(server, true);
5255 return -ECONNABORTED;
5258 /* TODO: add support for compounds containing READ. */
5259 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5260 return receive_encrypted_read(server, &mids[0], num_mids);
5263 return receive_encrypted_standard(server, mids, bufs, num_mids);
5267 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5269 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5271 return handle_read_data(server, mid, buf, server->pdu_size,
5276 smb2_next_header(char *buf)
5278 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5279 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5281 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5282 return sizeof(struct smb2_transform_hdr) +
5283 le32_to_cpu(t_hdr->OriginalMessageSize);
5285 return le32_to_cpu(hdr->NextCommand);
5289 smb2_make_node(unsigned int xid, struct inode *inode,
5290 struct dentry *dentry, struct cifs_tcon *tcon,
5291 const char *full_path, umode_t mode, dev_t dev)
5293 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5295 FILE_ALL_INFO *buf = NULL;
5296 struct cifs_io_parms io_parms = {0};
5298 struct cifs_fid fid;
5299 struct cifs_open_parms oparms;
5300 unsigned int bytes_written;
5301 struct win_dev *pdev;
5305 * Check if mounted with mount parm 'sfu' mount parm.
5306 * SFU emulation should work with all servers, but only
5307 * supports block and char device (no socket & fifo),
5308 * and was used by default in earlier versions of Windows
5310 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5314 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5315 * their current NFS server) uses this approach to expose special files
5316 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5319 if (!S_ISCHR(mode) && !S_ISBLK(mode))
5322 cifs_dbg(FYI, "sfu compat create special file\n");
5324 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5331 oparms.cifs_sb = cifs_sb;
5332 oparms.desired_access = GENERIC_WRITE;
5333 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5334 CREATE_OPTION_SPECIAL);
5335 oparms.disposition = FILE_CREATE;
5336 oparms.path = full_path;
5338 oparms.reconnect = false;
5340 if (tcon->ses->server->oplocks)
5341 oplock = REQ_OPLOCK;
5344 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5349 * BB Do not bother to decode buf since no local inode yet to put
5350 * timestamps in, but we can reuse it safely.
5353 pdev = (struct win_dev *)buf;
5354 io_parms.pid = current->tgid;
5355 io_parms.tcon = tcon;
5356 io_parms.offset = 0;
5357 io_parms.length = sizeof(struct win_dev);
5358 iov[1].iov_base = buf;
5359 iov[1].iov_len = sizeof(struct win_dev);
5360 if (S_ISCHR(mode)) {
5361 memcpy(pdev->type, "IntxCHR", 8);
5362 pdev->major = cpu_to_le64(MAJOR(dev));
5363 pdev->minor = cpu_to_le64(MINOR(dev));
5364 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5365 &bytes_written, iov, 1);
5366 } else if (S_ISBLK(mode)) {
5367 memcpy(pdev->type, "IntxBLK", 8);
5368 pdev->major = cpu_to_le64(MAJOR(dev));
5369 pdev->minor = cpu_to_le64(MINOR(dev));
5370 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5371 &bytes_written, iov, 1);
5373 tcon->ses->server->ops->close(xid, tcon, &fid);
5376 /* FIXME: add code here to set EAs */
5383 struct smb_version_operations smb20_operations = {
5384 .compare_fids = smb2_compare_fids,
5385 .setup_request = smb2_setup_request,
5386 .setup_async_request = smb2_setup_async_request,
5387 .check_receive = smb2_check_receive,
5388 .add_credits = smb2_add_credits,
5389 .set_credits = smb2_set_credits,
5390 .get_credits_field = smb2_get_credits_field,
5391 .get_credits = smb2_get_credits,
5392 .wait_mtu_credits = cifs_wait_mtu_credits,
5393 .get_next_mid = smb2_get_next_mid,
5394 .revert_current_mid = smb2_revert_current_mid,
5395 .read_data_offset = smb2_read_data_offset,
5396 .read_data_length = smb2_read_data_length,
5397 .map_error = map_smb2_to_linux_error,
5398 .find_mid = smb2_find_mid,
5399 .check_message = smb2_check_message,
5400 .dump_detail = smb2_dump_detail,
5401 .clear_stats = smb2_clear_stats,
5402 .print_stats = smb2_print_stats,
5403 .is_oplock_break = smb2_is_valid_oplock_break,
5404 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5405 .downgrade_oplock = smb2_downgrade_oplock,
5406 .need_neg = smb2_need_neg,
5407 .negotiate = smb2_negotiate,
5408 .negotiate_wsize = smb2_negotiate_wsize,
5409 .negotiate_rsize = smb2_negotiate_rsize,
5410 .sess_setup = SMB2_sess_setup,
5411 .logoff = SMB2_logoff,
5412 .tree_connect = SMB2_tcon,
5413 .tree_disconnect = SMB2_tdis,
5414 .qfs_tcon = smb2_qfs_tcon,
5415 .is_path_accessible = smb2_is_path_accessible,
5416 .can_echo = smb2_can_echo,
5418 .query_path_info = smb2_query_path_info,
5419 .get_srv_inum = smb2_get_srv_inum,
5420 .query_file_info = smb2_query_file_info,
5421 .set_path_size = smb2_set_path_size,
5422 .set_file_size = smb2_set_file_size,
5423 .set_file_info = smb2_set_file_info,
5424 .set_compression = smb2_set_compression,
5425 .mkdir = smb2_mkdir,
5426 .mkdir_setinfo = smb2_mkdir_setinfo,
5427 .rmdir = smb2_rmdir,
5428 .unlink = smb2_unlink,
5429 .rename = smb2_rename_path,
5430 .create_hardlink = smb2_create_hardlink,
5431 .query_symlink = smb2_query_symlink,
5432 .query_mf_symlink = smb3_query_mf_symlink,
5433 .create_mf_symlink = smb3_create_mf_symlink,
5434 .open = smb2_open_file,
5435 .set_fid = smb2_set_fid,
5436 .close = smb2_close_file,
5437 .flush = smb2_flush_file,
5438 .async_readv = smb2_async_readv,
5439 .async_writev = smb2_async_writev,
5440 .sync_read = smb2_sync_read,
5441 .sync_write = smb2_sync_write,
5442 .query_dir_first = smb2_query_dir_first,
5443 .query_dir_next = smb2_query_dir_next,
5444 .close_dir = smb2_close_dir,
5445 .calc_smb_size = smb2_calc_size,
5446 .is_status_pending = smb2_is_status_pending,
5447 .is_session_expired = smb2_is_session_expired,
5448 .oplock_response = smb2_oplock_response,
5449 .queryfs = smb2_queryfs,
5450 .mand_lock = smb2_mand_lock,
5451 .mand_unlock_range = smb2_unlock_range,
5452 .push_mand_locks = smb2_push_mandatory_locks,
5453 .get_lease_key = smb2_get_lease_key,
5454 .set_lease_key = smb2_set_lease_key,
5455 .new_lease_key = smb2_new_lease_key,
5456 .calc_signature = smb2_calc_signature,
5457 .is_read_op = smb2_is_read_op,
5458 .set_oplock_level = smb2_set_oplock_level,
5459 .create_lease_buf = smb2_create_lease_buf,
5460 .parse_lease_buf = smb2_parse_lease_buf,
5461 .copychunk_range = smb2_copychunk_range,
5462 .wp_retry_size = smb2_wp_retry_size,
5463 .dir_needs_close = smb2_dir_needs_close,
5464 .get_dfs_refer = smb2_get_dfs_refer,
5465 .select_sectype = smb2_select_sectype,
5466 #ifdef CONFIG_CIFS_XATTR
5467 .query_all_EAs = smb2_query_eas,
5468 .set_EA = smb2_set_ea,
5469 #endif /* CIFS_XATTR */
5470 .get_acl = get_smb2_acl,
5471 .get_acl_by_fid = get_smb2_acl_by_fid,
5472 .set_acl = set_smb2_acl,
5473 .next_header = smb2_next_header,
5474 .ioctl_query_info = smb2_ioctl_query_info,
5475 .make_node = smb2_make_node,
5476 .fiemap = smb3_fiemap,
5477 .llseek = smb3_llseek,
5478 .is_status_io_timeout = smb2_is_status_io_timeout,
5479 .is_network_name_deleted = smb2_is_network_name_deleted,
5482 struct smb_version_operations smb21_operations = {
5483 .compare_fids = smb2_compare_fids,
5484 .setup_request = smb2_setup_request,
5485 .setup_async_request = smb2_setup_async_request,
5486 .check_receive = smb2_check_receive,
5487 .add_credits = smb2_add_credits,
5488 .set_credits = smb2_set_credits,
5489 .get_credits_field = smb2_get_credits_field,
5490 .get_credits = smb2_get_credits,
5491 .wait_mtu_credits = smb2_wait_mtu_credits,
5492 .adjust_credits = smb2_adjust_credits,
5493 .get_next_mid = smb2_get_next_mid,
5494 .revert_current_mid = smb2_revert_current_mid,
5495 .read_data_offset = smb2_read_data_offset,
5496 .read_data_length = smb2_read_data_length,
5497 .map_error = map_smb2_to_linux_error,
5498 .find_mid = smb2_find_mid,
5499 .check_message = smb2_check_message,
5500 .dump_detail = smb2_dump_detail,
5501 .clear_stats = smb2_clear_stats,
5502 .print_stats = smb2_print_stats,
5503 .is_oplock_break = smb2_is_valid_oplock_break,
5504 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5505 .downgrade_oplock = smb2_downgrade_oplock,
5506 .need_neg = smb2_need_neg,
5507 .negotiate = smb2_negotiate,
5508 .negotiate_wsize = smb2_negotiate_wsize,
5509 .negotiate_rsize = smb2_negotiate_rsize,
5510 .sess_setup = SMB2_sess_setup,
5511 .logoff = SMB2_logoff,
5512 .tree_connect = SMB2_tcon,
5513 .tree_disconnect = SMB2_tdis,
5514 .qfs_tcon = smb2_qfs_tcon,
5515 .is_path_accessible = smb2_is_path_accessible,
5516 .can_echo = smb2_can_echo,
5518 .query_path_info = smb2_query_path_info,
5519 .get_srv_inum = smb2_get_srv_inum,
5520 .query_file_info = smb2_query_file_info,
5521 .set_path_size = smb2_set_path_size,
5522 .set_file_size = smb2_set_file_size,
5523 .set_file_info = smb2_set_file_info,
5524 .set_compression = smb2_set_compression,
5525 .mkdir = smb2_mkdir,
5526 .mkdir_setinfo = smb2_mkdir_setinfo,
5527 .rmdir = smb2_rmdir,
5528 .unlink = smb2_unlink,
5529 .rename = smb2_rename_path,
5530 .create_hardlink = smb2_create_hardlink,
5531 .query_symlink = smb2_query_symlink,
5532 .query_mf_symlink = smb3_query_mf_symlink,
5533 .create_mf_symlink = smb3_create_mf_symlink,
5534 .open = smb2_open_file,
5535 .set_fid = smb2_set_fid,
5536 .close = smb2_close_file,
5537 .flush = smb2_flush_file,
5538 .async_readv = smb2_async_readv,
5539 .async_writev = smb2_async_writev,
5540 .sync_read = smb2_sync_read,
5541 .sync_write = smb2_sync_write,
5542 .query_dir_first = smb2_query_dir_first,
5543 .query_dir_next = smb2_query_dir_next,
5544 .close_dir = smb2_close_dir,
5545 .calc_smb_size = smb2_calc_size,
5546 .is_status_pending = smb2_is_status_pending,
5547 .is_session_expired = smb2_is_session_expired,
5548 .oplock_response = smb2_oplock_response,
5549 .queryfs = smb2_queryfs,
5550 .mand_lock = smb2_mand_lock,
5551 .mand_unlock_range = smb2_unlock_range,
5552 .push_mand_locks = smb2_push_mandatory_locks,
5553 .get_lease_key = smb2_get_lease_key,
5554 .set_lease_key = smb2_set_lease_key,
5555 .new_lease_key = smb2_new_lease_key,
5556 .calc_signature = smb2_calc_signature,
5557 .is_read_op = smb21_is_read_op,
5558 .set_oplock_level = smb21_set_oplock_level,
5559 .create_lease_buf = smb2_create_lease_buf,
5560 .parse_lease_buf = smb2_parse_lease_buf,
5561 .copychunk_range = smb2_copychunk_range,
5562 .wp_retry_size = smb2_wp_retry_size,
5563 .dir_needs_close = smb2_dir_needs_close,
5564 .enum_snapshots = smb3_enum_snapshots,
5565 .notify = smb3_notify,
5566 .get_dfs_refer = smb2_get_dfs_refer,
5567 .select_sectype = smb2_select_sectype,
5568 #ifdef CONFIG_CIFS_XATTR
5569 .query_all_EAs = smb2_query_eas,
5570 .set_EA = smb2_set_ea,
5571 #endif /* CIFS_XATTR */
5572 .get_acl = get_smb2_acl,
5573 .get_acl_by_fid = get_smb2_acl_by_fid,
5574 .set_acl = set_smb2_acl,
5575 .next_header = smb2_next_header,
5576 .ioctl_query_info = smb2_ioctl_query_info,
5577 .make_node = smb2_make_node,
5578 .fiemap = smb3_fiemap,
5579 .llseek = smb3_llseek,
5580 .is_status_io_timeout = smb2_is_status_io_timeout,
5581 .is_network_name_deleted = smb2_is_network_name_deleted,
5584 struct smb_version_operations smb30_operations = {
5585 .compare_fids = smb2_compare_fids,
5586 .setup_request = smb2_setup_request,
5587 .setup_async_request = smb2_setup_async_request,
5588 .check_receive = smb2_check_receive,
5589 .add_credits = smb2_add_credits,
5590 .set_credits = smb2_set_credits,
5591 .get_credits_field = smb2_get_credits_field,
5592 .get_credits = smb2_get_credits,
5593 .wait_mtu_credits = smb2_wait_mtu_credits,
5594 .adjust_credits = smb2_adjust_credits,
5595 .get_next_mid = smb2_get_next_mid,
5596 .revert_current_mid = smb2_revert_current_mid,
5597 .read_data_offset = smb2_read_data_offset,
5598 .read_data_length = smb2_read_data_length,
5599 .map_error = map_smb2_to_linux_error,
5600 .find_mid = smb2_find_mid,
5601 .check_message = smb2_check_message,
5602 .dump_detail = smb2_dump_detail,
5603 .clear_stats = smb2_clear_stats,
5604 .print_stats = smb2_print_stats,
5605 .dump_share_caps = smb2_dump_share_caps,
5606 .is_oplock_break = smb2_is_valid_oplock_break,
5607 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5608 .downgrade_oplock = smb3_downgrade_oplock,
5609 .need_neg = smb2_need_neg,
5610 .negotiate = smb2_negotiate,
5611 .negotiate_wsize = smb3_negotiate_wsize,
5612 .negotiate_rsize = smb3_negotiate_rsize,
5613 .sess_setup = SMB2_sess_setup,
5614 .logoff = SMB2_logoff,
5615 .tree_connect = SMB2_tcon,
5616 .tree_disconnect = SMB2_tdis,
5617 .qfs_tcon = smb3_qfs_tcon,
5618 .is_path_accessible = smb2_is_path_accessible,
5619 .can_echo = smb2_can_echo,
5621 .query_path_info = smb2_query_path_info,
5622 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5623 .query_reparse_tag = smb2_query_reparse_tag,
5624 .get_srv_inum = smb2_get_srv_inum,
5625 .query_file_info = smb2_query_file_info,
5626 .set_path_size = smb2_set_path_size,
5627 .set_file_size = smb2_set_file_size,
5628 .set_file_info = smb2_set_file_info,
5629 .set_compression = smb2_set_compression,
5630 .mkdir = smb2_mkdir,
5631 .mkdir_setinfo = smb2_mkdir_setinfo,
5632 .rmdir = smb2_rmdir,
5633 .unlink = smb2_unlink,
5634 .rename = smb2_rename_path,
5635 .create_hardlink = smb2_create_hardlink,
5636 .query_symlink = smb2_query_symlink,
5637 .query_mf_symlink = smb3_query_mf_symlink,
5638 .create_mf_symlink = smb3_create_mf_symlink,
5639 .open = smb2_open_file,
5640 .set_fid = smb2_set_fid,
5641 .close = smb2_close_file,
5642 .close_getattr = smb2_close_getattr,
5643 .flush = smb2_flush_file,
5644 .async_readv = smb2_async_readv,
5645 .async_writev = smb2_async_writev,
5646 .sync_read = smb2_sync_read,
5647 .sync_write = smb2_sync_write,
5648 .query_dir_first = smb2_query_dir_first,
5649 .query_dir_next = smb2_query_dir_next,
5650 .close_dir = smb2_close_dir,
5651 .calc_smb_size = smb2_calc_size,
5652 .is_status_pending = smb2_is_status_pending,
5653 .is_session_expired = smb2_is_session_expired,
5654 .oplock_response = smb2_oplock_response,
5655 .queryfs = smb2_queryfs,
5656 .mand_lock = smb2_mand_lock,
5657 .mand_unlock_range = smb2_unlock_range,
5658 .push_mand_locks = smb2_push_mandatory_locks,
5659 .get_lease_key = smb2_get_lease_key,
5660 .set_lease_key = smb2_set_lease_key,
5661 .new_lease_key = smb2_new_lease_key,
5662 .generate_signingkey = generate_smb30signingkey,
5663 .calc_signature = smb3_calc_signature,
5664 .set_integrity = smb3_set_integrity,
5665 .is_read_op = smb21_is_read_op,
5666 .set_oplock_level = smb3_set_oplock_level,
5667 .create_lease_buf = smb3_create_lease_buf,
5668 .parse_lease_buf = smb3_parse_lease_buf,
5669 .copychunk_range = smb2_copychunk_range,
5670 .duplicate_extents = smb2_duplicate_extents,
5671 .validate_negotiate = smb3_validate_negotiate,
5672 .wp_retry_size = smb2_wp_retry_size,
5673 .dir_needs_close = smb2_dir_needs_close,
5674 .fallocate = smb3_fallocate,
5675 .enum_snapshots = smb3_enum_snapshots,
5676 .notify = smb3_notify,
5677 .init_transform_rq = smb3_init_transform_rq,
5678 .is_transform_hdr = smb3_is_transform_hdr,
5679 .receive_transform = smb3_receive_transform,
5680 .get_dfs_refer = smb2_get_dfs_refer,
5681 .select_sectype = smb2_select_sectype,
5682 #ifdef CONFIG_CIFS_XATTR
5683 .query_all_EAs = smb2_query_eas,
5684 .set_EA = smb2_set_ea,
5685 #endif /* CIFS_XATTR */
5686 .get_acl = get_smb2_acl,
5687 .get_acl_by_fid = get_smb2_acl_by_fid,
5688 .set_acl = set_smb2_acl,
5689 .next_header = smb2_next_header,
5690 .ioctl_query_info = smb2_ioctl_query_info,
5691 .make_node = smb2_make_node,
5692 .fiemap = smb3_fiemap,
5693 .llseek = smb3_llseek,
5694 .is_status_io_timeout = smb2_is_status_io_timeout,
5695 .is_network_name_deleted = smb2_is_network_name_deleted,
5698 struct smb_version_operations smb311_operations = {
5699 .compare_fids = smb2_compare_fids,
5700 .setup_request = smb2_setup_request,
5701 .setup_async_request = smb2_setup_async_request,
5702 .check_receive = smb2_check_receive,
5703 .add_credits = smb2_add_credits,
5704 .set_credits = smb2_set_credits,
5705 .get_credits_field = smb2_get_credits_field,
5706 .get_credits = smb2_get_credits,
5707 .wait_mtu_credits = smb2_wait_mtu_credits,
5708 .adjust_credits = smb2_adjust_credits,
5709 .get_next_mid = smb2_get_next_mid,
5710 .revert_current_mid = smb2_revert_current_mid,
5711 .read_data_offset = smb2_read_data_offset,
5712 .read_data_length = smb2_read_data_length,
5713 .map_error = map_smb2_to_linux_error,
5714 .find_mid = smb2_find_mid,
5715 .check_message = smb2_check_message,
5716 .dump_detail = smb2_dump_detail,
5717 .clear_stats = smb2_clear_stats,
5718 .print_stats = smb2_print_stats,
5719 .dump_share_caps = smb2_dump_share_caps,
5720 .is_oplock_break = smb2_is_valid_oplock_break,
5721 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5722 .downgrade_oplock = smb3_downgrade_oplock,
5723 .need_neg = smb2_need_neg,
5724 .negotiate = smb2_negotiate,
5725 .negotiate_wsize = smb3_negotiate_wsize,
5726 .negotiate_rsize = smb3_negotiate_rsize,
5727 .sess_setup = SMB2_sess_setup,
5728 .logoff = SMB2_logoff,
5729 .tree_connect = SMB2_tcon,
5730 .tree_disconnect = SMB2_tdis,
5731 .qfs_tcon = smb3_qfs_tcon,
5732 .is_path_accessible = smb2_is_path_accessible,
5733 .can_echo = smb2_can_echo,
5735 .query_path_info = smb2_query_path_info,
5736 .query_reparse_tag = smb2_query_reparse_tag,
5737 .get_srv_inum = smb2_get_srv_inum,
5738 .query_file_info = smb2_query_file_info,
5739 .set_path_size = smb2_set_path_size,
5740 .set_file_size = smb2_set_file_size,
5741 .set_file_info = smb2_set_file_info,
5742 .set_compression = smb2_set_compression,
5743 .mkdir = smb2_mkdir,
5744 .mkdir_setinfo = smb2_mkdir_setinfo,
5745 .posix_mkdir = smb311_posix_mkdir,
5746 .rmdir = smb2_rmdir,
5747 .unlink = smb2_unlink,
5748 .rename = smb2_rename_path,
5749 .create_hardlink = smb2_create_hardlink,
5750 .query_symlink = smb2_query_symlink,
5751 .query_mf_symlink = smb3_query_mf_symlink,
5752 .create_mf_symlink = smb3_create_mf_symlink,
5753 .open = smb2_open_file,
5754 .set_fid = smb2_set_fid,
5755 .close = smb2_close_file,
5756 .close_getattr = smb2_close_getattr,
5757 .flush = smb2_flush_file,
5758 .async_readv = smb2_async_readv,
5759 .async_writev = smb2_async_writev,
5760 .sync_read = smb2_sync_read,
5761 .sync_write = smb2_sync_write,
5762 .query_dir_first = smb2_query_dir_first,
5763 .query_dir_next = smb2_query_dir_next,
5764 .close_dir = smb2_close_dir,
5765 .calc_smb_size = smb2_calc_size,
5766 .is_status_pending = smb2_is_status_pending,
5767 .is_session_expired = smb2_is_session_expired,
5768 .oplock_response = smb2_oplock_response,
5769 .queryfs = smb311_queryfs,
5770 .mand_lock = smb2_mand_lock,
5771 .mand_unlock_range = smb2_unlock_range,
5772 .push_mand_locks = smb2_push_mandatory_locks,
5773 .get_lease_key = smb2_get_lease_key,
5774 .set_lease_key = smb2_set_lease_key,
5775 .new_lease_key = smb2_new_lease_key,
5776 .generate_signingkey = generate_smb311signingkey,
5777 .calc_signature = smb3_calc_signature,
5778 .set_integrity = smb3_set_integrity,
5779 .is_read_op = smb21_is_read_op,
5780 .set_oplock_level = smb3_set_oplock_level,
5781 .create_lease_buf = smb3_create_lease_buf,
5782 .parse_lease_buf = smb3_parse_lease_buf,
5783 .copychunk_range = smb2_copychunk_range,
5784 .duplicate_extents = smb2_duplicate_extents,
5785 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5786 .wp_retry_size = smb2_wp_retry_size,
5787 .dir_needs_close = smb2_dir_needs_close,
5788 .fallocate = smb3_fallocate,
5789 .enum_snapshots = smb3_enum_snapshots,
5790 .notify = smb3_notify,
5791 .init_transform_rq = smb3_init_transform_rq,
5792 .is_transform_hdr = smb3_is_transform_hdr,
5793 .receive_transform = smb3_receive_transform,
5794 .get_dfs_refer = smb2_get_dfs_refer,
5795 .select_sectype = smb2_select_sectype,
5796 #ifdef CONFIG_CIFS_XATTR
5797 .query_all_EAs = smb2_query_eas,
5798 .set_EA = smb2_set_ea,
5799 #endif /* CIFS_XATTR */
5800 .get_acl = get_smb2_acl,
5801 .get_acl_by_fid = get_smb2_acl_by_fid,
5802 .set_acl = set_smb2_acl,
5803 .next_header = smb2_next_header,
5804 .ioctl_query_info = smb2_ioctl_query_info,
5805 .make_node = smb2_make_node,
5806 .fiemap = smb3_fiemap,
5807 .llseek = smb3_llseek,
5808 .is_status_io_timeout = smb2_is_status_io_timeout,
5809 .is_network_name_deleted = smb2_is_network_name_deleted,
5812 struct smb_version_values smb20_values = {
5813 .version_string = SMB20_VERSION_STRING,
5814 .protocol_id = SMB20_PROT_ID,
5815 .req_capabilities = 0, /* MBZ */
5816 .large_lock_type = 0,
5817 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5818 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5819 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5820 .header_size = sizeof(struct smb2_hdr),
5821 .header_preamble_size = 0,
5822 .max_header_size = MAX_SMB2_HDR_SIZE,
5823 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5824 .lock_cmd = SMB2_LOCK,
5826 .cap_nt_find = SMB2_NT_FIND,
5827 .cap_large_files = SMB2_LARGE_FILES,
5828 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5829 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5830 .create_lease_size = sizeof(struct create_lease),
5833 struct smb_version_values smb21_values = {
5834 .version_string = SMB21_VERSION_STRING,
5835 .protocol_id = SMB21_PROT_ID,
5836 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5837 .large_lock_type = 0,
5838 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5839 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5840 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5841 .header_size = sizeof(struct smb2_hdr),
5842 .header_preamble_size = 0,
5843 .max_header_size = MAX_SMB2_HDR_SIZE,
5844 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5845 .lock_cmd = SMB2_LOCK,
5847 .cap_nt_find = SMB2_NT_FIND,
5848 .cap_large_files = SMB2_LARGE_FILES,
5849 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5850 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5851 .create_lease_size = sizeof(struct create_lease),
5854 struct smb_version_values smb3any_values = {
5855 .version_string = SMB3ANY_VERSION_STRING,
5856 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5857 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5858 .large_lock_type = 0,
5859 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5860 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5861 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5862 .header_size = sizeof(struct smb2_hdr),
5863 .header_preamble_size = 0,
5864 .max_header_size = MAX_SMB2_HDR_SIZE,
5865 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5866 .lock_cmd = SMB2_LOCK,
5868 .cap_nt_find = SMB2_NT_FIND,
5869 .cap_large_files = SMB2_LARGE_FILES,
5870 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5871 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5872 .create_lease_size = sizeof(struct create_lease_v2),
5875 struct smb_version_values smbdefault_values = {
5876 .version_string = SMBDEFAULT_VERSION_STRING,
5877 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5878 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5879 .large_lock_type = 0,
5880 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5881 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5882 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5883 .header_size = sizeof(struct smb2_hdr),
5884 .header_preamble_size = 0,
5885 .max_header_size = MAX_SMB2_HDR_SIZE,
5886 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5887 .lock_cmd = SMB2_LOCK,
5889 .cap_nt_find = SMB2_NT_FIND,
5890 .cap_large_files = SMB2_LARGE_FILES,
5891 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5892 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5893 .create_lease_size = sizeof(struct create_lease_v2),
5896 struct smb_version_values smb30_values = {
5897 .version_string = SMB30_VERSION_STRING,
5898 .protocol_id = SMB30_PROT_ID,
5899 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5900 .large_lock_type = 0,
5901 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5902 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5903 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5904 .header_size = sizeof(struct smb2_hdr),
5905 .header_preamble_size = 0,
5906 .max_header_size = MAX_SMB2_HDR_SIZE,
5907 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5908 .lock_cmd = SMB2_LOCK,
5910 .cap_nt_find = SMB2_NT_FIND,
5911 .cap_large_files = SMB2_LARGE_FILES,
5912 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5913 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5914 .create_lease_size = sizeof(struct create_lease_v2),
5917 struct smb_version_values smb302_values = {
5918 .version_string = SMB302_VERSION_STRING,
5919 .protocol_id = SMB302_PROT_ID,
5920 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5921 .large_lock_type = 0,
5922 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5923 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5924 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5925 .header_size = sizeof(struct smb2_hdr),
5926 .header_preamble_size = 0,
5927 .max_header_size = MAX_SMB2_HDR_SIZE,
5928 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5929 .lock_cmd = SMB2_LOCK,
5931 .cap_nt_find = SMB2_NT_FIND,
5932 .cap_large_files = SMB2_LARGE_FILES,
5933 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5934 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5935 .create_lease_size = sizeof(struct create_lease_v2),
5938 struct smb_version_values smb311_values = {
5939 .version_string = SMB311_VERSION_STRING,
5940 .protocol_id = SMB311_PROT_ID,
5941 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5942 .large_lock_type = 0,
5943 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5944 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5945 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5946 .header_size = sizeof(struct smb2_hdr),
5947 .header_preamble_size = 0,
5948 .max_header_size = MAX_SMB2_HDR_SIZE,
5949 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5950 .lock_cmd = SMB2_LOCK,
5952 .cap_nt_find = SMB2_NT_FIND,
5953 .cap_large_files = SMB2_LARGE_FILES,
5954 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5955 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5956 .create_lease_size = sizeof(struct create_lease_v2),