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>
18 #include "smb2proto.h"
19 #include "cifsproto.h"
20 #include "cifs_debug.h"
21 #include "cifs_unicode.h"
22 #include "smb2status.h"
24 #include "cifs_ioctl.h"
25 #include "smbdirect.h"
27 /* Change credits for different ops and return the total number of credits */
29 change_conf(struct TCP_Server_Info *server)
31 server->credits += server->echo_credits + server->oplock_credits;
32 server->oplock_credits = server->echo_credits = 0;
33 switch (server->credits) {
37 server->echoes = false;
38 server->oplocks = false;
41 server->echoes = true;
42 server->oplocks = false;
43 server->echo_credits = 1;
46 server->echoes = true;
48 server->oplocks = true;
49 server->oplock_credits = 1;
51 server->oplocks = false;
53 server->echo_credits = 1;
55 server->credits -= server->echo_credits + server->oplock_credits;
56 return server->credits + server->echo_credits + server->oplock_credits;
60 smb2_add_credits(struct TCP_Server_Info *server,
61 const struct cifs_credits *credits, const int optype)
64 unsigned int add = credits->value;
65 unsigned int instance = credits->instance;
66 bool reconnect_detected = false;
68 spin_lock(&server->req_lock);
69 val = server->ops->get_credits_field(server, optype);
71 /* eg found case where write overlapping reconnect messed up credits */
72 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
73 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
74 server->hostname, *val);
75 if ((instance == 0) || (instance == server->reconnect_instance))
78 reconnect_detected = true;
81 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
82 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
85 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
86 rc = change_conf(server);
88 * Sometimes server returns 0 credits on oplock break ack - we need to
89 * rebalance credits in this case.
91 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
93 if (server->credits > 1) {
95 server->oplock_credits++;
98 spin_unlock(&server->req_lock);
99 wake_up(&server->request_q);
101 if (reconnect_detected)
102 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
105 if (server->tcpStatus == CifsNeedReconnect
106 || server->tcpStatus == CifsExiting)
111 /* change_conf hasn't been executed */
114 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
117 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
120 cifs_dbg(FYI, "disabling oplocks\n");
123 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
128 smb2_set_credits(struct TCP_Server_Info *server, const int val)
130 spin_lock(&server->req_lock);
131 server->credits = val;
133 server->reconnect_instance++;
134 spin_unlock(&server->req_lock);
135 /* don't log while holding the lock */
137 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
141 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
145 return &server->echo_credits;
147 return &server->oplock_credits;
149 return &server->credits;
154 smb2_get_credits(struct mid_q_entry *mid)
156 return mid->credits_received;
160 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
161 unsigned int *num, struct cifs_credits *credits)
164 unsigned int scredits;
166 spin_lock(&server->req_lock);
168 if (server->credits <= 0) {
169 spin_unlock(&server->req_lock);
170 cifs_num_waiters_inc(server);
171 rc = wait_event_killable(server->request_q,
172 has_credits(server, &server->credits, 1));
173 cifs_num_waiters_dec(server);
176 spin_lock(&server->req_lock);
178 if (server->tcpStatus == CifsExiting) {
179 spin_unlock(&server->req_lock);
183 scredits = server->credits;
184 /* can deadlock with reopen */
186 *num = SMB2_MAX_BUFFER_SIZE;
188 credits->instance = 0;
192 /* leave some credits for reopen and other ops */
194 *num = min_t(unsigned int, size,
195 scredits * SMB2_MAX_BUFFER_SIZE);
198 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
199 credits->instance = server->reconnect_instance;
200 server->credits -= credits->value;
202 if (server->in_flight > server->max_in_flight)
203 server->max_in_flight = server->in_flight;
207 spin_unlock(&server->req_lock);
212 smb2_adjust_credits(struct TCP_Server_Info *server,
213 struct cifs_credits *credits,
214 const unsigned int payload_size)
216 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
218 if (!credits->value || credits->value == new_val)
221 if (credits->value < new_val) {
222 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
223 credits->value, new_val);
227 spin_lock(&server->req_lock);
229 if (server->reconnect_instance != credits->instance) {
230 spin_unlock(&server->req_lock);
231 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
232 credits->value - new_val);
236 server->credits += credits->value - new_val;
237 spin_unlock(&server->req_lock);
238 wake_up(&server->request_q);
239 credits->value = new_val;
244 smb2_get_next_mid(struct TCP_Server_Info *server)
247 /* for SMB2 we need the current value */
248 spin_lock(&GlobalMid_Lock);
249 mid = server->CurrentMid++;
250 spin_unlock(&GlobalMid_Lock);
255 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
257 spin_lock(&GlobalMid_Lock);
258 if (server->CurrentMid >= val)
259 server->CurrentMid -= val;
260 spin_unlock(&GlobalMid_Lock);
263 static struct mid_q_entry *
264 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
266 struct mid_q_entry *mid;
267 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
268 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
270 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
271 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
275 spin_lock(&GlobalMid_Lock);
276 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
277 if ((mid->mid == wire_mid) &&
278 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
279 (mid->command == shdr->Command)) {
280 kref_get(&mid->refcount);
281 spin_unlock(&GlobalMid_Lock);
285 spin_unlock(&GlobalMid_Lock);
290 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
292 #ifdef CONFIG_CIFS_DEBUG2
293 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
295 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
296 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
298 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
299 server->ops->calc_smb_size(buf, server));
304 smb2_need_neg(struct TCP_Server_Info *server)
306 return server->max_read == 0;
310 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
314 cifs_ses_server(ses)->CurrentMid = 0;
315 rc = SMB2_negotiate(xid, ses);
316 /* BB we probably don't need to retry with modern servers */
323 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
325 struct TCP_Server_Info *server = tcon->ses->server;
328 /* start with specified wsize, or default */
329 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
330 wsize = min_t(unsigned int, wsize, server->max_write);
331 #ifdef CONFIG_CIFS_SMB_DIRECT
334 wsize = min_t(unsigned int,
335 wsize, server->smbd_conn->max_fragmented_send_size);
337 wsize = min_t(unsigned int,
338 wsize, server->smbd_conn->max_readwrite_size);
341 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
342 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
348 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
350 struct TCP_Server_Info *server = tcon->ses->server;
353 /* start with specified wsize, or default */
354 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
355 wsize = min_t(unsigned int, wsize, server->max_write);
356 #ifdef CONFIG_CIFS_SMB_DIRECT
359 wsize = min_t(unsigned int,
360 wsize, server->smbd_conn->max_fragmented_send_size);
362 wsize = min_t(unsigned int,
363 wsize, server->smbd_conn->max_readwrite_size);
366 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
367 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
373 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
375 struct TCP_Server_Info *server = tcon->ses->server;
378 /* start with specified rsize, or default */
379 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
380 rsize = min_t(unsigned int, rsize, server->max_read);
381 #ifdef CONFIG_CIFS_SMB_DIRECT
384 rsize = min_t(unsigned int,
385 rsize, server->smbd_conn->max_fragmented_recv_size);
387 rsize = min_t(unsigned int,
388 rsize, server->smbd_conn->max_readwrite_size);
392 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
393 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
399 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
401 struct TCP_Server_Info *server = tcon->ses->server;
404 /* start with specified rsize, or default */
405 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
406 rsize = min_t(unsigned int, rsize, server->max_read);
407 #ifdef CONFIG_CIFS_SMB_DIRECT
410 rsize = min_t(unsigned int,
411 rsize, server->smbd_conn->max_fragmented_recv_size);
413 rsize = min_t(unsigned int,
414 rsize, server->smbd_conn->max_readwrite_size);
418 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
419 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
425 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
427 struct cifs_server_iface **iface_list,
430 struct network_interface_info_ioctl_rsp *p;
431 struct sockaddr_in *addr4;
432 struct sockaddr_in6 *addr6;
433 struct iface_info_ipv4 *p4;
434 struct iface_info_ipv6 *p6;
435 struct cifs_server_iface *info;
445 * Fist pass: count and sanity check
448 bytes_left = buf_len;
450 while (bytes_left >= sizeof(*p)) {
452 next = le32_to_cpu(p->Next);
454 bytes_left -= sizeof(*p);
457 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
462 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
467 if (bytes_left || p->Next)
468 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
472 * Second pass: extract info to internal structure
475 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
482 bytes_left = buf_len;
484 while (bytes_left >= sizeof(*p)) {
485 info->speed = le64_to_cpu(p->LinkSpeed);
486 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
487 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
489 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
490 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
491 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
492 le32_to_cpu(p->Capability));
496 * The kernel and wire socket structures have the same
497 * layout and use network byte order but make the
498 * conversion explicit in case either one changes.
501 addr4 = (struct sockaddr_in *)&info->sockaddr;
502 p4 = (struct iface_info_ipv4 *)p->Buffer;
503 addr4->sin_family = AF_INET;
504 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
506 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
507 addr4->sin_port = cpu_to_be16(CIFS_PORT);
509 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
513 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
514 p6 = (struct iface_info_ipv6 *)p->Buffer;
515 addr6->sin6_family = AF_INET6;
516 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
518 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
519 addr6->sin6_flowinfo = 0;
520 addr6->sin6_scope_id = 0;
521 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
523 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
528 "%s: skipping unsupported socket family\n",
536 next = le32_to_cpu(p->Next);
539 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
557 static int compare_iface(const void *ia, const void *ib)
559 const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
560 const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
562 return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
566 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
569 unsigned int ret_data_len = 0;
570 struct network_interface_info_ioctl_rsp *out_buf = NULL;
571 struct cifs_server_iface *iface_list;
573 struct cifs_ses *ses = tcon->ses;
575 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
576 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
577 NULL /* no data input */, 0 /* no data input */,
578 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
579 if (rc == -EOPNOTSUPP) {
581 "server does not support query network interfaces\n");
583 } else if (rc != 0) {
584 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
588 rc = parse_server_interfaces(out_buf, ret_data_len,
589 &iface_list, &iface_count);
593 /* sort interfaces from fastest to slowest */
594 sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
596 spin_lock(&ses->iface_lock);
597 kfree(ses->iface_list);
598 ses->iface_list = iface_list;
599 ses->iface_count = iface_count;
600 ses->iface_last_update = jiffies;
601 spin_unlock(&ses->iface_lock);
609 smb2_close_cached_fid(struct kref *ref)
611 struct cached_fid *cfid = container_of(ref, struct cached_fid,
614 if (cfid->is_valid) {
615 cifs_dbg(FYI, "clear cached root file handle\n");
616 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
617 cfid->fid->volatile_fid);
618 cfid->is_valid = false;
619 cfid->file_all_info_is_valid = false;
620 cfid->has_lease = false;
624 void close_shroot(struct cached_fid *cfid)
626 mutex_lock(&cfid->fid_mutex);
627 kref_put(&cfid->refcount, smb2_close_cached_fid);
628 mutex_unlock(&cfid->fid_mutex);
631 void close_shroot_lease_locked(struct cached_fid *cfid)
633 if (cfid->has_lease) {
634 cfid->has_lease = false;
635 kref_put(&cfid->refcount, smb2_close_cached_fid);
639 void close_shroot_lease(struct cached_fid *cfid)
641 mutex_lock(&cfid->fid_mutex);
642 close_shroot_lease_locked(cfid);
643 mutex_unlock(&cfid->fid_mutex);
647 smb2_cached_lease_break(struct work_struct *work)
649 struct cached_fid *cfid = container_of(work,
650 struct cached_fid, lease_break);
652 close_shroot_lease(cfid);
656 * Open the directory at the root of a share
658 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
660 struct cifs_ses *ses = tcon->ses;
661 struct TCP_Server_Info *server = ses->server;
662 struct cifs_open_parms oparms;
663 struct smb2_create_rsp *o_rsp = NULL;
664 struct smb2_query_info_rsp *qi_rsp = NULL;
666 struct smb_rqst rqst[2];
667 struct kvec rsp_iov[2];
668 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
669 struct kvec qi_iov[1];
671 __le16 utf16_path = 0; /* Null - since an open of top of share */
672 u8 oplock = SMB2_OPLOCK_LEVEL_II;
674 mutex_lock(&tcon->crfid.fid_mutex);
675 if (tcon->crfid.is_valid) {
676 cifs_dbg(FYI, "found a cached root file handle\n");
677 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
678 kref_get(&tcon->crfid.refcount);
679 mutex_unlock(&tcon->crfid.fid_mutex);
684 * We do not hold the lock for the open because in case
685 * SMB2_open needs to reconnect, it will end up calling
686 * cifs_mark_open_files_invalid() which takes the lock again
687 * thus causing a deadlock
690 mutex_unlock(&tcon->crfid.fid_mutex);
692 if (smb3_encryption_required(tcon))
693 flags |= CIFS_TRANSFORM_REQ;
695 memset(rqst, 0, sizeof(rqst));
696 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
697 memset(rsp_iov, 0, sizeof(rsp_iov));
700 memset(&open_iov, 0, sizeof(open_iov));
701 rqst[0].rq_iov = open_iov;
702 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
705 oparms.create_options = 0;
706 oparms.desired_access = FILE_READ_ATTRIBUTES;
707 oparms.disposition = FILE_OPEN;
709 oparms.reconnect = false;
711 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
714 smb2_set_next_command(tcon, &rqst[0]);
716 memset(&qi_iov, 0, sizeof(qi_iov));
717 rqst[1].rq_iov = qi_iov;
720 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
721 COMPOUND_FID, FILE_ALL_INFORMATION,
723 sizeof(struct smb2_file_all_info) +
724 PATH_MAX * 2, 0, NULL);
728 smb2_set_related(&rqst[1]);
730 rc = compound_send_recv(xid, ses, flags, 2, rqst,
731 resp_buftype, rsp_iov);
732 mutex_lock(&tcon->crfid.fid_mutex);
735 * Now we need to check again as the cached root might have
736 * been successfully re-opened from a concurrent process
739 if (tcon->crfid.is_valid) {
740 /* work was already done */
742 /* stash fids for close() later */
743 struct cifs_fid fid = {
744 .persistent_fid = pfid->persistent_fid,
745 .volatile_fid = pfid->volatile_fid,
749 * caller expects this func to set pfid to a valid
750 * cached root, so we copy the existing one and get a
753 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
754 kref_get(&tcon->crfid.refcount);
756 mutex_unlock(&tcon->crfid.fid_mutex);
759 /* close extra handle outside of crit sec */
760 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
765 /* Cached root is still invalid, continue normaly */
768 if (rc == -EREMCHG) {
769 tcon->need_reconnect = true;
770 printk_once(KERN_WARNING "server share %s deleted\n",
776 atomic_inc(&tcon->num_remote_opens);
778 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
779 oparms.fid->persistent_fid = o_rsp->PersistentFileId;
780 oparms.fid->volatile_fid = o_rsp->VolatileFileId;
781 #ifdef CONFIG_CIFS_DEBUG2
782 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
783 #endif /* CIFS_DEBUG2 */
785 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
786 tcon->crfid.tcon = tcon;
787 tcon->crfid.is_valid = true;
788 kref_init(&tcon->crfid.refcount);
790 /* BB TBD check to see if oplock level check can be removed below */
791 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
792 kref_get(&tcon->crfid.refcount);
793 tcon->crfid.has_lease = true;
794 smb2_parse_contexts(server, o_rsp,
796 oparms.fid->lease_key, &oplock, NULL);
800 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
801 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
803 if (!smb2_validate_and_copy_iov(
804 le16_to_cpu(qi_rsp->OutputBufferOffset),
805 sizeof(struct smb2_file_all_info),
806 &rsp_iov[1], sizeof(struct smb2_file_all_info),
807 (char *)&tcon->crfid.file_all_info))
808 tcon->crfid.file_all_info_is_valid = true;
811 mutex_unlock(&tcon->crfid.fid_mutex);
813 SMB2_open_free(&rqst[0]);
814 SMB2_query_info_free(&rqst[1]);
815 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
816 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
821 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
824 __le16 srch_path = 0; /* Null - open root of share */
825 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
826 struct cifs_open_parms oparms;
828 bool no_cached_open = tcon->nohandlecache;
831 oparms.desired_access = FILE_READ_ATTRIBUTES;
832 oparms.disposition = FILE_OPEN;
833 oparms.create_options = 0;
835 oparms.reconnect = false;
838 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
841 rc = open_shroot(xid, tcon, &fid);
846 SMB3_request_interfaces(xid, tcon);
848 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
849 FS_ATTRIBUTE_INFORMATION);
850 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
851 FS_DEVICE_INFORMATION);
852 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
853 FS_VOLUME_INFORMATION);
854 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
855 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
857 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
859 close_shroot(&tcon->crfid);
863 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
866 __le16 srch_path = 0; /* Null - open root of share */
867 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
868 struct cifs_open_parms oparms;
872 oparms.desired_access = FILE_READ_ATTRIBUTES;
873 oparms.disposition = FILE_OPEN;
874 oparms.create_options = 0;
876 oparms.reconnect = false;
878 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
882 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
883 FS_ATTRIBUTE_INFORMATION);
884 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
885 FS_DEVICE_INFORMATION);
886 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
890 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
891 struct cifs_sb_info *cifs_sb, const char *full_path)
895 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
896 struct cifs_open_parms oparms;
899 if ((*full_path == 0) && tcon->crfid.is_valid)
902 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
907 oparms.desired_access = FILE_READ_ATTRIBUTES;
908 oparms.disposition = FILE_OPEN;
909 if (backup_cred(cifs_sb))
910 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
912 oparms.create_options = 0;
914 oparms.reconnect = false;
916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
922 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
928 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
929 struct cifs_sb_info *cifs_sb, const char *full_path,
930 u64 *uniqueid, FILE_ALL_INFO *data)
932 *uniqueid = le64_to_cpu(data->IndexNumber);
937 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
938 struct cifs_fid *fid, FILE_ALL_INFO *data)
941 struct smb2_file_all_info *smb2_data;
943 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
945 if (smb2_data == NULL)
948 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
951 move_smb2_info_to_cifs(data, smb2_data);
956 #ifdef CONFIG_CIFS_XATTR
958 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
959 struct smb2_file_full_ea_info *src, size_t src_size,
960 const unsigned char *ea_name)
963 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
965 size_t buf_size = dst_size;
966 size_t name_len, value_len, user_name_len;
968 while (src_size > 0) {
969 name = &src->ea_data[0];
970 name_len = (size_t)src->ea_name_length;
971 value = &src->ea_data[src->ea_name_length + 1];
972 value_len = (size_t)le16_to_cpu(src->ea_value_length);
977 if (src_size < 8 + name_len + 1 + value_len) {
978 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
984 if (ea_name_len == name_len &&
985 memcmp(ea_name, name, name_len) == 0) {
989 if (dst_size < value_len) {
993 memcpy(dst, value, value_len);
997 /* 'user.' plus a terminating null */
998 user_name_len = 5 + 1 + name_len;
1000 if (buf_size == 0) {
1001 /* skip copy - calc size only */
1002 rc += user_name_len;
1003 } else if (dst_size >= user_name_len) {
1004 dst_size -= user_name_len;
1005 memcpy(dst, "user.", 5);
1007 memcpy(dst, src->ea_data, name_len);
1011 rc += user_name_len;
1013 /* stop before overrun buffer */
1019 if (!src->next_entry_offset)
1022 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1023 /* stop before overrun buffer */
1027 src_size -= le32_to_cpu(src->next_entry_offset);
1028 src = (void *)((char *)src +
1029 le32_to_cpu(src->next_entry_offset));
1032 /* didn't find the named attribute */
1041 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1042 const unsigned char *path, const unsigned char *ea_name,
1043 char *ea_data, size_t buf_size,
1044 struct cifs_sb_info *cifs_sb)
1048 struct kvec rsp_iov = {NULL, 0};
1049 int buftype = CIFS_NO_BUFFER;
1050 struct smb2_query_info_rsp *rsp;
1051 struct smb2_file_full_ea_info *info = NULL;
1053 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1057 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1059 FILE_FULL_EA_INFORMATION,
1062 MAX_SMB2_CREATE_RESPONSE_SIZE -
1063 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1064 &rsp_iov, &buftype, cifs_sb);
1067 * If ea_name is NULL (listxattr) and there are no EAs,
1068 * return 0 as it's not an error. Otherwise, the specified
1069 * ea_name was not found.
1071 if (!ea_name && rc == -ENODATA)
1076 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1077 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1078 le32_to_cpu(rsp->OutputBufferLength),
1080 sizeof(struct smb2_file_full_ea_info));
1084 info = (struct smb2_file_full_ea_info *)(
1085 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1086 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1087 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1091 free_rsp_buf(buftype, rsp_iov.iov_base);
1097 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1098 const char *path, const char *ea_name, const void *ea_value,
1099 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1100 struct cifs_sb_info *cifs_sb)
1102 struct cifs_ses *ses = tcon->ses;
1103 __le16 *utf16_path = NULL;
1104 int ea_name_len = strlen(ea_name);
1107 struct smb_rqst rqst[3];
1108 int resp_buftype[3];
1109 struct kvec rsp_iov[3];
1110 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1111 struct cifs_open_parms oparms;
1112 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1113 struct cifs_fid fid;
1114 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1115 unsigned int size[1];
1117 struct smb2_file_full_ea_info *ea = NULL;
1118 struct kvec close_iov[1];
1121 if (smb3_encryption_required(tcon))
1122 flags |= CIFS_TRANSFORM_REQ;
1124 if (ea_name_len > 255)
1127 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1131 memset(rqst, 0, sizeof(rqst));
1132 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1133 memset(rsp_iov, 0, sizeof(rsp_iov));
1135 if (ses->server->ops->query_all_EAs) {
1137 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1146 memset(&open_iov, 0, sizeof(open_iov));
1147 rqst[0].rq_iov = open_iov;
1148 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1150 memset(&oparms, 0, sizeof(oparms));
1152 oparms.desired_access = FILE_WRITE_EA;
1153 oparms.disposition = FILE_OPEN;
1154 if (backup_cred(cifs_sb))
1155 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1157 oparms.create_options = 0;
1159 oparms.reconnect = false;
1161 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1164 smb2_set_next_command(tcon, &rqst[0]);
1168 memset(&si_iov, 0, sizeof(si_iov));
1169 rqst[1].rq_iov = si_iov;
1170 rqst[1].rq_nvec = 1;
1172 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1173 ea = kzalloc(len, GFP_KERNEL);
1179 ea->ea_name_length = ea_name_len;
1180 ea->ea_value_length = cpu_to_le16(ea_value_len);
1181 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1182 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1187 rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1188 COMPOUND_FID, current->tgid,
1189 FILE_FULL_EA_INFORMATION,
1190 SMB2_O_INFO_FILE, 0, data, size);
1191 smb2_set_next_command(tcon, &rqst[1]);
1192 smb2_set_related(&rqst[1]);
1196 memset(&close_iov, 0, sizeof(close_iov));
1197 rqst[2].rq_iov = close_iov;
1198 rqst[2].rq_nvec = 1;
1199 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1200 smb2_set_related(&rqst[2]);
1202 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1203 resp_buftype, rsp_iov);
1204 /* no need to bump num_remote_opens because handle immediately closed */
1209 SMB2_open_free(&rqst[0]);
1210 SMB2_set_info_free(&rqst[1]);
1211 SMB2_close_free(&rqst[2]);
1212 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1213 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1214 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1220 smb2_can_echo(struct TCP_Server_Info *server)
1222 return server->echoes;
1226 smb2_clear_stats(struct cifs_tcon *tcon)
1230 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1231 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1232 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1237 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1239 seq_puts(m, "\n\tShare Capabilities:");
1240 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1241 seq_puts(m, " DFS,");
1242 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1243 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1244 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1245 seq_puts(m, " SCALEOUT,");
1246 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1247 seq_puts(m, " CLUSTER,");
1248 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1249 seq_puts(m, " ASYMMETRIC,");
1250 if (tcon->capabilities == 0)
1251 seq_puts(m, " None");
1252 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1253 seq_puts(m, " Aligned,");
1254 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1255 seq_puts(m, " Partition Aligned,");
1256 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1257 seq_puts(m, " SSD,");
1258 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1259 seq_puts(m, " TRIM-support,");
1261 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1262 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1263 if (tcon->perf_sector_size)
1264 seq_printf(m, "\tOptimal sector size: 0x%x",
1265 tcon->perf_sector_size);
1266 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1270 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1272 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1273 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1276 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1277 * totals (requests sent) since those SMBs are per-session not per tcon
1279 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1280 (long long)(tcon->bytes_read),
1281 (long long)(tcon->bytes_written));
1282 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1283 atomic_read(&tcon->num_local_opens),
1284 atomic_read(&tcon->num_remote_opens));
1285 seq_printf(m, "\nTreeConnects: %d total %d failed",
1286 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1287 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1288 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1289 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1290 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1291 seq_printf(m, "\nCreates: %d total %d failed",
1292 atomic_read(&sent[SMB2_CREATE_HE]),
1293 atomic_read(&failed[SMB2_CREATE_HE]));
1294 seq_printf(m, "\nCloses: %d total %d failed",
1295 atomic_read(&sent[SMB2_CLOSE_HE]),
1296 atomic_read(&failed[SMB2_CLOSE_HE]));
1297 seq_printf(m, "\nFlushes: %d total %d failed",
1298 atomic_read(&sent[SMB2_FLUSH_HE]),
1299 atomic_read(&failed[SMB2_FLUSH_HE]));
1300 seq_printf(m, "\nReads: %d total %d failed",
1301 atomic_read(&sent[SMB2_READ_HE]),
1302 atomic_read(&failed[SMB2_READ_HE]));
1303 seq_printf(m, "\nWrites: %d total %d failed",
1304 atomic_read(&sent[SMB2_WRITE_HE]),
1305 atomic_read(&failed[SMB2_WRITE_HE]));
1306 seq_printf(m, "\nLocks: %d total %d failed",
1307 atomic_read(&sent[SMB2_LOCK_HE]),
1308 atomic_read(&failed[SMB2_LOCK_HE]));
1309 seq_printf(m, "\nIOCTLs: %d total %d failed",
1310 atomic_read(&sent[SMB2_IOCTL_HE]),
1311 atomic_read(&failed[SMB2_IOCTL_HE]));
1312 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1313 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1314 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1315 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1316 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1317 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1318 seq_printf(m, "\nQueryInfos: %d total %d failed",
1319 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1320 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1321 seq_printf(m, "\nSetInfos: %d total %d failed",
1322 atomic_read(&sent[SMB2_SET_INFO_HE]),
1323 atomic_read(&failed[SMB2_SET_INFO_HE]));
1324 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1325 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1326 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1330 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1332 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1333 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1335 cfile->fid.persistent_fid = fid->persistent_fid;
1336 cfile->fid.volatile_fid = fid->volatile_fid;
1337 #ifdef CONFIG_CIFS_DEBUG2
1338 cfile->fid.mid = fid->mid;
1339 #endif /* CIFS_DEBUG2 */
1340 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1342 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1343 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1347 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1348 struct cifs_fid *fid)
1350 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1354 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1355 struct cifsFileInfo *cfile)
1357 struct smb2_file_network_open_info file_inf;
1358 struct inode *inode;
1361 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1362 cfile->fid.volatile_fid, &file_inf);
1366 inode = d_inode(cfile->dentry);
1368 spin_lock(&inode->i_lock);
1369 CIFS_I(inode)->time = jiffies;
1371 /* Creation time should not need to be updated on close */
1372 if (file_inf.LastWriteTime)
1373 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1374 if (file_inf.ChangeTime)
1375 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1376 if (file_inf.LastAccessTime)
1377 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1380 * i_blocks is not related to (i_size / i_blksize),
1381 * but instead 512 byte (2**9) size is required for
1382 * calculating num blocks.
1384 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1386 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1388 /* End of file and Attributes should not have to be updated on close */
1389 spin_unlock(&inode->i_lock);
1393 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1394 u64 persistent_fid, u64 volatile_fid,
1395 struct copychunk_ioctl *pcchunk)
1398 unsigned int ret_data_len;
1399 struct resume_key_req *res_key;
1401 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1402 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1403 NULL, 0 /* no input */, CIFSMaxBufSize,
1404 (char **)&res_key, &ret_data_len);
1407 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1408 goto req_res_key_exit;
1410 if (ret_data_len < sizeof(struct resume_key_req)) {
1411 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1413 goto req_res_key_exit;
1415 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1423 smb2_ioctl_query_info(const unsigned int xid,
1424 struct cifs_tcon *tcon,
1425 __le16 *path, int is_dir,
1428 struct cifs_ses *ses = tcon->ses;
1429 char __user *arg = (char __user *)p;
1430 struct smb_query_info qi;
1431 struct smb_query_info __user *pqi;
1434 struct smb2_query_info_rsp *qi_rsp = NULL;
1435 struct smb2_ioctl_rsp *io_rsp = NULL;
1436 void *buffer = NULL;
1437 struct smb_rqst rqst[3];
1438 int resp_buftype[3];
1439 struct kvec rsp_iov[3];
1440 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1441 struct cifs_open_parms oparms;
1442 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1443 struct cifs_fid fid;
1444 struct kvec qi_iov[1];
1445 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1446 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1447 struct kvec close_iov[1];
1448 unsigned int size[2];
1451 memset(rqst, 0, sizeof(rqst));
1452 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1453 memset(rsp_iov, 0, sizeof(rsp_iov));
1455 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1458 if (qi.output_buffer_length > 1024)
1461 if (!ses || !(ses->server))
1464 if (smb3_encryption_required(tcon))
1465 flags |= CIFS_TRANSFORM_REQ;
1467 buffer = memdup_user(arg + sizeof(struct smb_query_info),
1468 qi.output_buffer_length);
1470 return PTR_ERR(buffer);
1473 memset(&open_iov, 0, sizeof(open_iov));
1474 rqst[0].rq_iov = open_iov;
1475 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1477 memset(&oparms, 0, sizeof(oparms));
1479 oparms.disposition = FILE_OPEN;
1481 oparms.create_options = CREATE_NOT_FILE;
1483 oparms.create_options = CREATE_NOT_DIR;
1485 oparms.reconnect = false;
1487 if (qi.flags & PASSTHRU_FSCTL) {
1488 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1489 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1490 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1492 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1493 oparms.desired_access = GENERIC_ALL;
1495 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1496 oparms.desired_access = GENERIC_READ;
1498 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1499 oparms.desired_access = GENERIC_WRITE;
1502 } else if (qi.flags & PASSTHRU_SET_INFO) {
1503 oparms.desired_access = GENERIC_WRITE;
1505 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1508 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1511 smb2_set_next_command(tcon, &rqst[0]);
1514 if (qi.flags & PASSTHRU_FSCTL) {
1515 /* Can eventually relax perm check since server enforces too */
1516 if (!capable(CAP_SYS_ADMIN))
1519 memset(&io_iov, 0, sizeof(io_iov));
1520 rqst[1].rq_iov = io_iov;
1521 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1523 rc = SMB2_ioctl_init(tcon, &rqst[1],
1524 COMPOUND_FID, COMPOUND_FID,
1525 qi.info_type, true, buffer,
1526 qi.output_buffer_length,
1528 MAX_SMB2_CREATE_RESPONSE_SIZE -
1529 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1531 } else if (qi.flags == PASSTHRU_SET_INFO) {
1532 /* Can eventually relax perm check since server enforces too */
1533 if (!capable(CAP_SYS_ADMIN))
1536 memset(&si_iov, 0, sizeof(si_iov));
1537 rqst[1].rq_iov = si_iov;
1538 rqst[1].rq_nvec = 1;
1543 rc = SMB2_set_info_init(tcon, &rqst[1],
1544 COMPOUND_FID, COMPOUND_FID,
1546 FILE_END_OF_FILE_INFORMATION,
1547 SMB2_O_INFO_FILE, 0, data, size);
1549 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1550 memset(&qi_iov, 0, sizeof(qi_iov));
1551 rqst[1].rq_iov = qi_iov;
1552 rqst[1].rq_nvec = 1;
1554 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1555 COMPOUND_FID, qi.file_info_class,
1556 qi.info_type, qi.additional_information,
1557 qi.input_buffer_length,
1558 qi.output_buffer_length, buffer);
1559 } else { /* unknown flags */
1560 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1566 smb2_set_next_command(tcon, &rqst[1]);
1567 smb2_set_related(&rqst[1]);
1570 memset(&close_iov, 0, sizeof(close_iov));
1571 rqst[2].rq_iov = close_iov;
1572 rqst[2].rq_nvec = 1;
1574 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1577 smb2_set_related(&rqst[2]);
1579 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1580 resp_buftype, rsp_iov);
1584 /* No need to bump num_remote_opens since handle immediately closed */
1585 if (qi.flags & PASSTHRU_FSCTL) {
1586 pqi = (struct smb_query_info __user *)arg;
1587 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1588 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1589 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1590 if (qi.input_buffer_length > 0 &&
1591 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1592 > rsp_iov[1].iov_len)
1595 if (copy_to_user(&pqi->input_buffer_length,
1596 &qi.input_buffer_length,
1597 sizeof(qi.input_buffer_length)))
1600 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1601 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1602 qi.input_buffer_length))
1605 pqi = (struct smb_query_info __user *)arg;
1606 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1607 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1608 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1609 if (copy_to_user(&pqi->input_buffer_length,
1610 &qi.input_buffer_length,
1611 sizeof(qi.input_buffer_length)))
1614 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1615 qi.input_buffer_length))
1621 SMB2_open_free(&rqst[0]);
1622 if (qi.flags & PASSTHRU_FSCTL)
1623 SMB2_ioctl_free(&rqst[1]);
1625 SMB2_query_info_free(&rqst[1]);
1627 SMB2_close_free(&rqst[2]);
1628 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1629 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1630 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1639 smb2_copychunk_range(const unsigned int xid,
1640 struct cifsFileInfo *srcfile,
1641 struct cifsFileInfo *trgtfile, u64 src_off,
1642 u64 len, u64 dest_off)
1645 unsigned int ret_data_len;
1646 struct copychunk_ioctl *pcchunk;
1647 struct copychunk_ioctl_rsp *retbuf = NULL;
1648 struct cifs_tcon *tcon;
1649 int chunks_copied = 0;
1650 bool chunk_sizes_updated = false;
1651 ssize_t bytes_written, total_bytes_written = 0;
1653 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1655 if (pcchunk == NULL)
1658 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1659 /* Request a key from the server to identify the source of the copy */
1660 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1661 srcfile->fid.persistent_fid,
1662 srcfile->fid.volatile_fid, pcchunk);
1664 /* Note: request_res_key sets res_key null only if rc !=0 */
1668 /* For now array only one chunk long, will make more flexible later */
1669 pcchunk->ChunkCount = cpu_to_le32(1);
1670 pcchunk->Reserved = 0;
1671 pcchunk->Reserved2 = 0;
1673 tcon = tlink_tcon(trgtfile->tlink);
1676 pcchunk->SourceOffset = cpu_to_le64(src_off);
1677 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1679 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1681 /* Request server copy to target from src identified by key */
1682 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1683 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1684 true /* is_fsctl */, (char *)pcchunk,
1685 sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1686 (char **)&retbuf, &ret_data_len);
1689 sizeof(struct copychunk_ioctl_rsp)) {
1690 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1694 if (retbuf->TotalBytesWritten == 0) {
1695 cifs_dbg(FYI, "no bytes copied\n");
1700 * Check if server claimed to write more than we asked
1702 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1703 le32_to_cpu(pcchunk->Length)) {
1704 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1708 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1709 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1715 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1716 src_off += bytes_written;
1717 dest_off += bytes_written;
1718 len -= bytes_written;
1719 total_bytes_written += bytes_written;
1721 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1722 le32_to_cpu(retbuf->ChunksWritten),
1723 le32_to_cpu(retbuf->ChunkBytesWritten),
1725 } else if (rc == -EINVAL) {
1726 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1729 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1730 le32_to_cpu(retbuf->ChunksWritten),
1731 le32_to_cpu(retbuf->ChunkBytesWritten),
1732 le32_to_cpu(retbuf->TotalBytesWritten));
1735 * Check if this is the first request using these sizes,
1736 * (ie check if copy succeed once with original sizes
1737 * and check if the server gave us different sizes after
1738 * we already updated max sizes on previous request).
1739 * if not then why is the server returning an error now
1741 if ((chunks_copied != 0) || chunk_sizes_updated)
1744 /* Check that server is not asking us to grow size */
1745 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1746 tcon->max_bytes_chunk)
1747 tcon->max_bytes_chunk =
1748 le32_to_cpu(retbuf->ChunkBytesWritten);
1750 goto cchunk_out; /* server gave us bogus size */
1752 /* No need to change MaxChunks since already set to 1 */
1753 chunk_sizes_updated = true;
1764 return total_bytes_written;
1768 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1769 struct cifs_fid *fid)
1771 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1775 smb2_read_data_offset(char *buf)
1777 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1779 return rsp->DataOffset;
1783 smb2_read_data_length(char *buf, bool in_remaining)
1785 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1788 return le32_to_cpu(rsp->DataRemaining);
1790 return le32_to_cpu(rsp->DataLength);
1795 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1796 struct cifs_io_parms *parms, unsigned int *bytes_read,
1797 char **buf, int *buf_type)
1799 parms->persistent_fid = pfid->persistent_fid;
1800 parms->volatile_fid = pfid->volatile_fid;
1801 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1805 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1806 struct cifs_io_parms *parms, unsigned int *written,
1807 struct kvec *iov, unsigned long nr_segs)
1810 parms->persistent_fid = pfid->persistent_fid;
1811 parms->volatile_fid = pfid->volatile_fid;
1812 return SMB2_write(xid, parms, written, iov, nr_segs);
1815 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1816 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1817 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1819 struct cifsInodeInfo *cifsi;
1822 cifsi = CIFS_I(inode);
1824 /* if file already sparse don't bother setting sparse again */
1825 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1826 return true; /* already sparse */
1828 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1829 return true; /* already not sparse */
1832 * Can't check for sparse support on share the usual way via the
1833 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1834 * since Samba server doesn't set the flag on the share, yet
1835 * supports the set sparse FSCTL and returns sparse correctly
1836 * in the file attributes. If we fail setting sparse though we
1837 * mark that server does not support sparse files for this share
1838 * to avoid repeatedly sending the unsupported fsctl to server
1839 * if the file is repeatedly extended.
1841 if (tcon->broken_sparse_sup)
1844 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1845 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1847 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1849 tcon->broken_sparse_sup = true;
1850 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1855 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1857 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1863 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1864 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1866 __le64 eof = cpu_to_le64(size);
1867 struct inode *inode;
1870 * If extending file more than one page make sparse. Many Linux fs
1871 * make files sparse by default when extending via ftruncate
1873 inode = d_inode(cfile->dentry);
1875 if (!set_alloc && (size > inode->i_size + 8192)) {
1876 __u8 set_sparse = 1;
1878 /* whether set sparse succeeds or not, extend the file */
1879 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1882 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1883 cfile->fid.volatile_fid, cfile->pid, &eof);
1887 smb2_duplicate_extents(const unsigned int xid,
1888 struct cifsFileInfo *srcfile,
1889 struct cifsFileInfo *trgtfile, u64 src_off,
1890 u64 len, u64 dest_off)
1893 unsigned int ret_data_len;
1894 struct duplicate_extents_to_file dup_ext_buf;
1895 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1897 /* server fileays advertise duplicate extent support with this flag */
1898 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1899 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1902 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1903 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1904 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1905 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1906 dup_ext_buf.ByteCount = cpu_to_le64(len);
1907 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1908 src_off, dest_off, len);
1910 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1912 goto duplicate_extents_out;
1914 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1915 trgtfile->fid.volatile_fid,
1916 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1917 true /* is_fsctl */,
1918 (char *)&dup_ext_buf,
1919 sizeof(struct duplicate_extents_to_file),
1920 CIFSMaxBufSize, NULL,
1923 if (ret_data_len > 0)
1924 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1926 duplicate_extents_out:
1931 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1932 struct cifsFileInfo *cfile)
1934 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1935 cfile->fid.volatile_fid);
1939 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1940 struct cifsFileInfo *cfile)
1942 struct fsctl_set_integrity_information_req integr_info;
1943 unsigned int ret_data_len;
1945 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1946 integr_info.Flags = 0;
1947 integr_info.Reserved = 0;
1949 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1950 cfile->fid.volatile_fid,
1951 FSCTL_SET_INTEGRITY_INFORMATION,
1952 true /* is_fsctl */,
1953 (char *)&integr_info,
1954 sizeof(struct fsctl_set_integrity_information_req),
1955 CIFSMaxBufSize, NULL,
1960 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1961 #define GMT_TOKEN_SIZE 50
1963 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1966 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1967 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1970 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1971 struct cifsFileInfo *cfile, void __user *ioc_buf)
1973 char *retbuf = NULL;
1974 unsigned int ret_data_len = 0;
1976 u32 max_response_size;
1977 struct smb_snapshot_array snapshot_in;
1980 * On the first query to enumerate the list of snapshots available
1981 * for this volume the buffer begins with 0 (number of snapshots
1982 * which can be returned is zero since at that point we do not know
1983 * how big the buffer needs to be). On the second query,
1984 * it (ret_data_len) is set to number of snapshots so we can
1985 * know to set the maximum response size larger (see below).
1987 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1991 * Note that for snapshot queries that servers like Azure expect that
1992 * the first query be minimal size (and just used to get the number/size
1993 * of previous versions) so response size must be specified as EXACTLY
1994 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1997 if (ret_data_len == 0)
1998 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2000 max_response_size = CIFSMaxBufSize;
2002 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2003 cfile->fid.volatile_fid,
2004 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2005 true /* is_fsctl */,
2006 NULL, 0 /* no input data */, max_response_size,
2009 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2014 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2016 if (copy_from_user(&snapshot_in, ioc_buf,
2017 sizeof(struct smb_snapshot_array))) {
2024 * Check for min size, ie not large enough to fit even one GMT
2025 * token (snapshot). On the first ioctl some users may pass in
2026 * smaller size (or zero) to simply get the size of the array
2027 * so the user space caller can allocate sufficient memory
2028 * and retry the ioctl again with larger array size sufficient
2029 * to hold all of the snapshot GMT tokens on the second try.
2031 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2032 ret_data_len = sizeof(struct smb_snapshot_array);
2035 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2036 * the snapshot array (of 50 byte GMT tokens) each
2037 * representing an available previous version of the data
2039 if (ret_data_len > (snapshot_in.snapshot_array_size +
2040 sizeof(struct smb_snapshot_array)))
2041 ret_data_len = snapshot_in.snapshot_array_size +
2042 sizeof(struct smb_snapshot_array);
2044 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2053 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2054 const char *path, struct cifs_sb_info *cifs_sb,
2055 struct cifs_fid *fid, __u16 search_flags,
2056 struct cifs_search_info *srch_inf)
2059 struct smb_rqst rqst[2];
2060 struct kvec rsp_iov[2];
2061 int resp_buftype[2];
2062 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2063 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2065 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2066 struct cifs_open_parms oparms;
2067 struct smb2_query_directory_rsp *qd_rsp = NULL;
2068 struct smb2_create_rsp *op_rsp = NULL;
2070 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2074 if (smb3_encryption_required(tcon))
2075 flags |= CIFS_TRANSFORM_REQ;
2077 memset(rqst, 0, sizeof(rqst));
2078 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2079 memset(rsp_iov, 0, sizeof(rsp_iov));
2082 memset(&open_iov, 0, sizeof(open_iov));
2083 rqst[0].rq_iov = open_iov;
2084 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2087 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2088 oparms.disposition = FILE_OPEN;
2089 if (backup_cred(cifs_sb))
2090 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2092 oparms.create_options = 0;
2094 oparms.reconnect = false;
2096 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2099 smb2_set_next_command(tcon, &rqst[0]);
2101 /* Query directory */
2102 srch_inf->entries_in_buffer = 0;
2103 srch_inf->index_of_last_entry = 2;
2105 memset(&qd_iov, 0, sizeof(qd_iov));
2106 rqst[1].rq_iov = qd_iov;
2107 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2109 rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2110 COMPOUND_FID, COMPOUND_FID,
2111 0, srch_inf->info_level);
2115 smb2_set_related(&rqst[1]);
2117 rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2118 resp_buftype, rsp_iov);
2120 /* If the open failed there is nothing to do */
2121 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2122 if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2123 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2126 fid->persistent_fid = op_rsp->PersistentFileId;
2127 fid->volatile_fid = op_rsp->VolatileFileId;
2129 /* Anything else than ENODATA means a genuine error */
2130 if (rc && rc != -ENODATA) {
2131 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2132 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2133 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2134 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2138 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2139 if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2140 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2141 tcon->tid, tcon->ses->Suid, 0, 0);
2142 srch_inf->endOfSearch = true;
2147 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2150 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2151 tcon->ses->Suid, 0, 0, rc);
2154 resp_buftype[1] = CIFS_NO_BUFFER;
2156 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2157 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2161 SMB2_open_free(&rqst[0]);
2162 SMB2_query_directory_free(&rqst[1]);
2163 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2164 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2169 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2170 struct cifs_fid *fid, __u16 search_flags,
2171 struct cifs_search_info *srch_inf)
2173 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2174 fid->volatile_fid, 0, srch_inf);
2178 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2179 struct cifs_fid *fid)
2181 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2185 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2186 * the number of credits and return true. Otherwise - return false.
2189 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2191 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2193 if (shdr->Status != STATUS_PENDING)
2196 if (shdr->CreditRequest) {
2197 spin_lock(&server->req_lock);
2198 server->credits += le16_to_cpu(shdr->CreditRequest);
2199 spin_unlock(&server->req_lock);
2200 wake_up(&server->request_q);
2207 smb2_is_session_expired(char *buf)
2209 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2211 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2212 shdr->Status != STATUS_USER_SESSION_DELETED)
2215 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2216 le16_to_cpu(shdr->Command),
2217 le64_to_cpu(shdr->MessageId));
2218 cifs_dbg(FYI, "Session expired or deleted\n");
2224 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2225 struct cifsInodeInfo *cinode)
2227 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2228 return SMB2_lease_break(0, tcon, cinode->lease_key,
2229 smb2_get_lease_state(cinode));
2231 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2233 CIFS_CACHE_READ(cinode) ? 1 : 0);
2237 smb2_set_related(struct smb_rqst *rqst)
2239 struct smb2_sync_hdr *shdr;
2241 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2243 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2246 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2249 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2252 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2254 struct smb2_sync_hdr *shdr;
2255 struct cifs_ses *ses = tcon->ses;
2256 struct TCP_Server_Info *server = ses->server;
2257 unsigned long len = smb_rqst_len(server, rqst);
2260 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2262 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2266 /* SMB headers in a compound are 8 byte aligned. */
2268 /* No padding needed */
2272 num_padding = 8 - (len & 7);
2273 if (!smb3_encryption_required(tcon)) {
2275 * If we do not have encryption then we can just add an extra
2276 * iov for the padding.
2278 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2279 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2284 * We can not add a small padding iov for the encryption case
2285 * because the encryption framework can not handle the padding
2287 * We have to flatten this into a single buffer and add
2288 * the padding to it.
2290 for (i = 1; i < rqst->rq_nvec; i++) {
2291 memcpy(rqst->rq_iov[0].iov_base +
2292 rqst->rq_iov[0].iov_len,
2293 rqst->rq_iov[i].iov_base,
2294 rqst->rq_iov[i].iov_len);
2295 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2297 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2299 rqst->rq_iov[0].iov_len += num_padding;
2305 shdr->NextCommand = cpu_to_le32(len);
2309 * Passes the query info response back to the caller on success.
2310 * Caller need to free this with free_rsp_buf().
2313 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2314 __le16 *utf16_path, u32 desired_access,
2315 u32 class, u32 type, u32 output_len,
2316 struct kvec *rsp, int *buftype,
2317 struct cifs_sb_info *cifs_sb)
2319 struct cifs_ses *ses = tcon->ses;
2321 struct smb_rqst rqst[3];
2322 int resp_buftype[3];
2323 struct kvec rsp_iov[3];
2324 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2325 struct kvec qi_iov[1];
2326 struct kvec close_iov[1];
2327 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2328 struct cifs_open_parms oparms;
2329 struct cifs_fid fid;
2332 if (smb3_encryption_required(tcon))
2333 flags |= CIFS_TRANSFORM_REQ;
2335 memset(rqst, 0, sizeof(rqst));
2336 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2337 memset(rsp_iov, 0, sizeof(rsp_iov));
2339 memset(&open_iov, 0, sizeof(open_iov));
2340 rqst[0].rq_iov = open_iov;
2341 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2344 oparms.desired_access = desired_access;
2345 oparms.disposition = FILE_OPEN;
2346 if (cifs_sb && backup_cred(cifs_sb))
2347 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2349 oparms.create_options = 0;
2351 oparms.reconnect = false;
2353 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2356 smb2_set_next_command(tcon, &rqst[0]);
2358 memset(&qi_iov, 0, sizeof(qi_iov));
2359 rqst[1].rq_iov = qi_iov;
2360 rqst[1].rq_nvec = 1;
2362 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2368 smb2_set_next_command(tcon, &rqst[1]);
2369 smb2_set_related(&rqst[1]);
2371 memset(&close_iov, 0, sizeof(close_iov));
2372 rqst[2].rq_iov = close_iov;
2373 rqst[2].rq_nvec = 1;
2375 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2378 smb2_set_related(&rqst[2]);
2380 rc = compound_send_recv(xid, ses, flags, 3, rqst,
2381 resp_buftype, rsp_iov);
2383 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2384 if (rc == -EREMCHG) {
2385 tcon->need_reconnect = true;
2386 printk_once(KERN_WARNING "server share %s deleted\n",
2392 *buftype = resp_buftype[1];
2395 SMB2_open_free(&rqst[0]);
2396 SMB2_query_info_free(&rqst[1]);
2397 SMB2_close_free(&rqst[2]);
2398 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2399 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2404 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2405 struct kstatfs *buf)
2407 struct smb2_query_info_rsp *rsp;
2408 struct smb2_fs_full_size_info *info = NULL;
2409 __le16 utf16_path = 0; /* Null - open root of share */
2410 struct kvec rsp_iov = {NULL, 0};
2411 int buftype = CIFS_NO_BUFFER;
2415 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2416 FILE_READ_ATTRIBUTES,
2417 FS_FULL_SIZE_INFORMATION,
2418 SMB2_O_INFO_FILESYSTEM,
2419 sizeof(struct smb2_fs_full_size_info),
2420 &rsp_iov, &buftype, NULL);
2424 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2425 buf->f_type = SMB2_MAGIC_NUMBER;
2426 info = (struct smb2_fs_full_size_info *)(
2427 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2428 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2429 le32_to_cpu(rsp->OutputBufferLength),
2431 sizeof(struct smb2_fs_full_size_info));
2433 smb2_copy_fs_info_to_kstatfs(info, buf);
2436 free_rsp_buf(buftype, rsp_iov.iov_base);
2441 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2442 struct kstatfs *buf)
2445 __le16 srch_path = 0; /* Null - open root of share */
2446 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2447 struct cifs_open_parms oparms;
2448 struct cifs_fid fid;
2450 if (!tcon->posix_extensions)
2451 return smb2_queryfs(xid, tcon, buf);
2454 oparms.desired_access = FILE_READ_ATTRIBUTES;
2455 oparms.disposition = FILE_OPEN;
2456 oparms.create_options = 0;
2458 oparms.reconnect = false;
2460 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2464 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2465 fid.volatile_fid, buf);
2466 buf->f_type = SMB2_MAGIC_NUMBER;
2467 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2472 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2474 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2475 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2479 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2480 __u64 length, __u32 type, int lock, int unlock, bool wait)
2482 if (unlock && !lock)
2483 type = SMB2_LOCKFLAG_UNLOCK;
2484 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2485 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2486 current->tgid, length, offset, type, wait);
2490 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2492 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2496 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2498 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2502 smb2_new_lease_key(struct cifs_fid *fid)
2504 generate_random_uuid(fid->lease_key);
2508 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2509 const char *search_name,
2510 struct dfs_info3_param **target_nodes,
2511 unsigned int *num_of_nodes,
2512 const struct nls_table *nls_codepage, int remap)
2515 __le16 *utf16_path = NULL;
2516 int utf16_path_len = 0;
2517 struct cifs_tcon *tcon;
2518 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2519 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2520 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2522 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2525 * Try to use the IPC tcon, otherwise just use any
2527 tcon = ses->tcon_ipc;
2529 spin_lock(&cifs_tcp_ses_lock);
2530 tcon = list_first_entry_or_null(&ses->tcon_list,
2535 spin_unlock(&cifs_tcp_ses_lock);
2539 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2545 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2547 nls_codepage, remap);
2553 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2554 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2560 /* Highest DFS referral version understood */
2561 dfs_req->MaxReferralLevel = DFS_VERSION;
2563 /* Path to resolve in an UTF-16 null-terminated string */
2564 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2567 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2568 FSCTL_DFS_GET_REFERRALS,
2569 true /* is_fsctl */,
2570 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2571 (char **)&dfs_rsp, &dfs_rsp_size);
2572 } while (rc == -EAGAIN);
2575 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2576 cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2580 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2581 num_of_nodes, target_nodes,
2582 nls_codepage, remap, search_name,
2583 true /* is_unicode */);
2585 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2590 if (tcon && !tcon->ipc) {
2591 /* ipc tcons are not refcounted */
2592 spin_lock(&cifs_tcp_ses_lock);
2594 spin_unlock(&cifs_tcp_ses_lock);
2603 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2604 u32 plen, char **target_path,
2605 struct cifs_sb_info *cifs_sb)
2609 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2610 len = le16_to_cpu(symlink_buf->ReparseDataLength);
2612 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2613 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2614 le64_to_cpu(symlink_buf->InodeType));
2618 *target_path = cifs_strndup_from_utf16(
2619 symlink_buf->PathBuffer,
2620 len, true, cifs_sb->local_nls);
2621 if (!(*target_path))
2624 convert_delimiter(*target_path, '/');
2625 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2631 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2632 u32 plen, char **target_path,
2633 struct cifs_sb_info *cifs_sb)
2635 unsigned int sub_len;
2636 unsigned int sub_offset;
2638 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2640 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2641 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2642 if (sub_offset + 20 > plen ||
2643 sub_offset + sub_len + 20 > plen) {
2644 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2648 *target_path = cifs_strndup_from_utf16(
2649 symlink_buf->PathBuffer + sub_offset,
2650 sub_len, true, cifs_sb->local_nls);
2651 if (!(*target_path))
2654 convert_delimiter(*target_path, '/');
2655 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2661 parse_reparse_point(struct reparse_data_buffer *buf,
2662 u32 plen, char **target_path,
2663 struct cifs_sb_info *cifs_sb)
2665 if (plen < sizeof(struct reparse_data_buffer)) {
2666 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2667 "at least 8 bytes but was %d\n", plen);
2671 if (plen < le16_to_cpu(buf->ReparseDataLength) +
2672 sizeof(struct reparse_data_buffer)) {
2673 cifs_dbg(VFS, "srv returned invalid reparse buf "
2674 "length: %d\n", plen);
2678 /* See MS-FSCC 2.1.2 */
2679 switch (le32_to_cpu(buf->ReparseTag)) {
2680 case IO_REPARSE_TAG_NFS:
2681 return parse_reparse_posix(
2682 (struct reparse_posix_data *)buf,
2683 plen, target_path, cifs_sb);
2684 case IO_REPARSE_TAG_SYMLINK:
2685 return parse_reparse_symlink(
2686 (struct reparse_symlink_data_buffer *)buf,
2687 plen, target_path, cifs_sb);
2689 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2690 "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2695 #define SMB2_SYMLINK_STRUCT_SIZE \
2696 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2699 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2700 struct cifs_sb_info *cifs_sb, const char *full_path,
2701 char **target_path, bool is_reparse_point)
2704 __le16 *utf16_path = NULL;
2705 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2706 struct cifs_open_parms oparms;
2707 struct cifs_fid fid;
2708 struct kvec err_iov = {NULL, 0};
2709 struct smb2_err_rsp *err_buf = NULL;
2710 struct smb2_symlink_err_rsp *symlink;
2711 unsigned int sub_len;
2712 unsigned int sub_offset;
2713 unsigned int print_len;
2714 unsigned int print_offset;
2716 struct smb_rqst rqst[3];
2717 int resp_buftype[3];
2718 struct kvec rsp_iov[3];
2719 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2720 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2721 struct kvec close_iov[1];
2722 struct smb2_create_rsp *create_rsp;
2723 struct smb2_ioctl_rsp *ioctl_rsp;
2724 struct reparse_data_buffer *reparse_buf;
2727 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2729 *target_path = NULL;
2731 if (smb3_encryption_required(tcon))
2732 flags |= CIFS_TRANSFORM_REQ;
2734 memset(rqst, 0, sizeof(rqst));
2735 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2736 memset(rsp_iov, 0, sizeof(rsp_iov));
2738 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2743 memset(&open_iov, 0, sizeof(open_iov));
2744 rqst[0].rq_iov = open_iov;
2745 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2747 memset(&oparms, 0, sizeof(oparms));
2749 oparms.desired_access = FILE_READ_ATTRIBUTES;
2750 oparms.disposition = FILE_OPEN;
2752 if (backup_cred(cifs_sb))
2753 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2755 oparms.create_options = 0;
2756 if (is_reparse_point)
2757 oparms.create_options = OPEN_REPARSE_POINT;
2760 oparms.reconnect = false;
2762 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2765 smb2_set_next_command(tcon, &rqst[0]);
2769 memset(&io_iov, 0, sizeof(io_iov));
2770 rqst[1].rq_iov = io_iov;
2771 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2773 rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2774 fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2775 true /* is_fctl */, NULL, 0,
2777 MAX_SMB2_CREATE_RESPONSE_SIZE -
2778 MAX_SMB2_CLOSE_RESPONSE_SIZE);
2782 smb2_set_next_command(tcon, &rqst[1]);
2783 smb2_set_related(&rqst[1]);
2787 memset(&close_iov, 0, sizeof(close_iov));
2788 rqst[2].rq_iov = close_iov;
2789 rqst[2].rq_nvec = 1;
2791 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2795 smb2_set_related(&rqst[2]);
2797 rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2798 resp_buftype, rsp_iov);
2800 create_rsp = rsp_iov[0].iov_base;
2801 if (create_rsp && create_rsp->sync_hdr.Status)
2802 err_iov = rsp_iov[0];
2803 ioctl_rsp = rsp_iov[1].iov_base;
2806 * Open was successful and we got an ioctl response.
2808 if ((rc == 0) && (is_reparse_point)) {
2809 /* See MS-FSCC 2.3.23 */
2811 reparse_buf = (struct reparse_data_buffer *)
2812 ((char *)ioctl_rsp +
2813 le32_to_cpu(ioctl_rsp->OutputOffset));
2814 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2816 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2817 rsp_iov[1].iov_len) {
2818 cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2824 rc = parse_reparse_point(reparse_buf, plen, target_path,
2829 if (!rc || !err_iov.iov_base) {
2834 err_buf = err_iov.iov_base;
2835 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2836 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2841 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2842 if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2843 le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2848 /* open must fail on symlink - reset rc */
2850 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2851 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2852 print_len = le16_to_cpu(symlink->PrintNameLength);
2853 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2855 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2860 if (err_iov.iov_len <
2861 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2866 *target_path = cifs_strndup_from_utf16(
2867 (char *)symlink->PathBuffer + sub_offset,
2868 sub_len, true, cifs_sb->local_nls);
2869 if (!(*target_path)) {
2873 convert_delimiter(*target_path, '/');
2874 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2877 cifs_dbg(FYI, "query symlink rc %d\n", rc);
2879 SMB2_open_free(&rqst[0]);
2880 SMB2_ioctl_free(&rqst[1]);
2881 SMB2_close_free(&rqst[2]);
2882 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2883 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2884 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2888 static struct cifs_ntsd *
2889 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2890 const struct cifs_fid *cifsfid, u32 *pacllen)
2892 struct cifs_ntsd *pntsd = NULL;
2894 int rc = -EOPNOTSUPP;
2895 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2898 return ERR_CAST(tlink);
2901 cifs_dbg(FYI, "trying to get acl\n");
2903 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2904 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2907 cifs_put_tlink(tlink);
2909 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2916 static struct cifs_ntsd *
2917 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2918 const char *path, u32 *pacllen)
2920 struct cifs_ntsd *pntsd = NULL;
2921 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2924 struct cifs_tcon *tcon;
2925 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2926 struct cifs_fid fid;
2927 struct cifs_open_parms oparms;
2930 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2932 return ERR_CAST(tlink);
2934 tcon = tlink_tcon(tlink);
2937 if (backup_cred(cifs_sb))
2938 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2940 oparms.create_options = 0;
2942 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2950 oparms.desired_access = READ_CONTROL;
2951 oparms.disposition = FILE_OPEN;
2953 oparms.reconnect = false;
2955 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2958 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2959 fid.volatile_fid, (void **)&pntsd, pacllen);
2960 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2963 cifs_put_tlink(tlink);
2966 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2973 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2974 struct inode *inode, const char *path, int aclflag)
2976 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2978 int rc, access_flags = 0;
2979 struct cifs_tcon *tcon;
2980 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2981 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2982 struct cifs_fid fid;
2983 struct cifs_open_parms oparms;
2986 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2988 return PTR_ERR(tlink);
2990 tcon = tlink_tcon(tlink);
2993 if (backup_cred(cifs_sb))
2994 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2996 oparms.create_options = 0;
2998 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2999 access_flags = WRITE_OWNER;
3001 access_flags = WRITE_DAC;
3003 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3011 oparms.desired_access = access_flags;
3012 oparms.disposition = FILE_OPEN;
3015 oparms.reconnect = false;
3017 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3020 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3021 fid.volatile_fid, pnntsd, acllen, aclflag);
3022 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3025 cifs_put_tlink(tlink);
3030 /* Retrieve an ACL from the server */
3031 static struct cifs_ntsd *
3032 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3033 struct inode *inode, const char *path,
3036 struct cifs_ntsd *pntsd = NULL;
3037 struct cifsFileInfo *open_file = NULL;
3040 open_file = find_readable_file(CIFS_I(inode), true);
3042 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3044 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3045 cifsFileInfo_put(open_file);
3049 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3050 loff_t offset, loff_t len, bool keep_size)
3052 struct cifs_ses *ses = tcon->ses;
3053 struct inode *inode;
3054 struct cifsInodeInfo *cifsi;
3055 struct cifsFileInfo *cfile = file->private_data;
3056 struct file_zero_data_information fsctl_buf;
3063 inode = d_inode(cfile->dentry);
3064 cifsi = CIFS_I(inode);
3066 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3067 ses->Suid, offset, len);
3070 /* if file not oplocked can't be sure whether asking to extend size */
3071 if (!CIFS_CACHE_READ(cifsi))
3072 if (keep_size == false) {
3074 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3075 tcon->tid, ses->Suid, offset, len, rc);
3080 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3082 fsctl_buf.FileOffset = cpu_to_le64(offset);
3083 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3085 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3086 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3088 sizeof(struct file_zero_data_information),
3091 goto zero_range_exit;
3094 * do we also need to change the size of the file?
3096 if (keep_size == false && i_size_read(inode) < offset + len) {
3097 eof = cpu_to_le64(offset + len);
3098 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3099 cfile->fid.volatile_fid, cfile->pid, &eof);
3105 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3106 ses->Suid, offset, len, rc);
3108 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3109 ses->Suid, offset, len);
3113 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3114 loff_t offset, loff_t len)
3116 struct inode *inode;
3117 struct cifsFileInfo *cfile = file->private_data;
3118 struct file_zero_data_information fsctl_buf;
3121 __u8 set_sparse = 1;
3125 inode = d_inode(cfile->dentry);
3127 /* Need to make file sparse, if not already, before freeing range. */
3128 /* Consider adding equivalent for compressed since it could also work */
3129 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3135 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3137 fsctl_buf.FileOffset = cpu_to_le64(offset);
3138 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3140 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3141 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3142 true /* is_fctl */, (char *)&fsctl_buf,
3143 sizeof(struct file_zero_data_information),
3144 CIFSMaxBufSize, NULL, NULL);
3149 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3150 loff_t off, loff_t len, bool keep_size)
3152 struct inode *inode;
3153 struct cifsInodeInfo *cifsi;
3154 struct cifsFileInfo *cfile = file->private_data;
3155 long rc = -EOPNOTSUPP;
3161 inode = d_inode(cfile->dentry);
3162 cifsi = CIFS_I(inode);
3164 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3165 tcon->ses->Suid, off, len);
3166 /* if file not oplocked can't be sure whether asking to extend size */
3167 if (!CIFS_CACHE_READ(cifsi))
3168 if (keep_size == false) {
3169 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3170 tcon->tid, tcon->ses->Suid, off, len, rc);
3176 * Extending the file
3178 if ((keep_size == false) && i_size_read(inode) < off + len) {
3179 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3180 smb2_set_sparse(xid, tcon, cfile, inode, false);
3182 eof = cpu_to_le64(off + len);
3183 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3184 cfile->fid.volatile_fid, cfile->pid, &eof);
3186 cifsi->server_eof = off + len;
3187 cifs_setsize(inode, off + len);
3188 cifs_truncate_page(inode->i_mapping, inode->i_size);
3189 truncate_setsize(inode, off + len);
3195 * Files are non-sparse by default so falloc may be a no-op
3196 * Must check if file sparse. If not sparse, and since we are not
3197 * extending then no need to do anything since file already allocated
3199 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3204 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3206 * Check if falloc starts within first few pages of file
3207 * and ends within a few pages of the end of file to
3208 * ensure that most of file is being forced to be
3209 * fallocated now. If so then setting whole file sparse
3210 * ie potentially making a few extra pages at the beginning
3211 * or end of the file non-sparse via set_sparse is harmless.
3213 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3219 smb2_set_sparse(xid, tcon, cfile, inode, false);
3224 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3225 tcon->ses->Suid, off, len, rc);
3227 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3228 tcon->ses->Suid, off, len);
3234 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3236 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3237 struct cifsInodeInfo *cifsi;
3238 struct inode *inode;
3240 struct file_allocated_range_buffer in_data, *out_data = NULL;
3244 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3245 return generic_file_llseek(file, offset, whence);
3247 inode = d_inode(cfile->dentry);
3248 cifsi = CIFS_I(inode);
3250 if (offset < 0 || offset >= i_size_read(inode))
3255 * We need to be sure that all dirty pages are written as they
3256 * might fill holes on the server.
3257 * Note that we also MUST flush any written pages since at least
3258 * some servers (Windows2016) will not reflect recent writes in
3259 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3261 wrcfile = find_writable_file(cifsi, false);
3263 filemap_write_and_wait(inode->i_mapping);
3264 smb2_flush_file(xid, tcon, &wrcfile->fid);
3265 cifsFileInfo_put(wrcfile);
3268 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3269 if (whence == SEEK_HOLE)
3270 offset = i_size_read(inode);
3274 in_data.file_offset = cpu_to_le64(offset);
3275 in_data.length = cpu_to_le64(i_size_read(inode));
3277 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3278 cfile->fid.volatile_fid,
3279 FSCTL_QUERY_ALLOCATED_RANGES, true,
3280 (char *)&in_data, sizeof(in_data),
3281 sizeof(struct file_allocated_range_buffer),
3282 (char **)&out_data, &out_data_len);
3288 if (whence == SEEK_HOLE && out_data_len == 0)
3291 if (whence == SEEK_DATA && out_data_len == 0) {
3296 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3300 if (whence == SEEK_DATA) {
3301 offset = le64_to_cpu(out_data->file_offset);
3304 if (offset < le64_to_cpu(out_data->file_offset))
3307 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3313 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3318 static int smb3_fiemap(struct cifs_tcon *tcon,
3319 struct cifsFileInfo *cfile,
3320 struct fiemap_extent_info *fei, u64 start, u64 len)
3323 struct file_allocated_range_buffer in_data, *out_data;
3325 int i, num, rc, flags, last_blob;
3328 if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3333 in_data.file_offset = cpu_to_le64(start);
3334 in_data.length = cpu_to_le64(len);
3336 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3337 cfile->fid.volatile_fid,
3338 FSCTL_QUERY_ALLOCATED_RANGES, true,
3339 (char *)&in_data, sizeof(in_data),
3340 1024 * sizeof(struct file_allocated_range_buffer),
3341 (char **)&out_data, &out_data_len);
3350 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3354 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3359 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3360 for (i = 0; i < num; i++) {
3362 if (i == num - 1 && last_blob)
3363 flags |= FIEMAP_EXTENT_LAST;
3365 rc = fiemap_fill_next_extent(fei,
3366 le64_to_cpu(out_data[i].file_offset),
3367 le64_to_cpu(out_data[i].file_offset),
3368 le64_to_cpu(out_data[i].length),
3379 next = le64_to_cpu(out_data[num - 1].file_offset) +
3380 le64_to_cpu(out_data[num - 1].length);
3381 len = len - (next - start);
3392 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3393 loff_t off, loff_t len)
3395 /* KEEP_SIZE already checked for by do_fallocate */
3396 if (mode & FALLOC_FL_PUNCH_HOLE)
3397 return smb3_punch_hole(file, tcon, off, len);
3398 else if (mode & FALLOC_FL_ZERO_RANGE) {
3399 if (mode & FALLOC_FL_KEEP_SIZE)
3400 return smb3_zero_range(file, tcon, off, len, true);
3401 return smb3_zero_range(file, tcon, off, len, false);
3402 } else if (mode == FALLOC_FL_KEEP_SIZE)
3403 return smb3_simple_falloc(file, tcon, off, len, true);
3405 return smb3_simple_falloc(file, tcon, off, len, false);
3411 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3412 struct cifsInodeInfo *cinode, __u32 oplock,
3413 unsigned int epoch, bool *purge_cache)
3415 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3419 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3420 unsigned int epoch, bool *purge_cache);
3423 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3424 struct cifsInodeInfo *cinode, __u32 oplock,
3425 unsigned int epoch, bool *purge_cache)
3427 unsigned int old_state = cinode->oplock;
3428 unsigned int old_epoch = cinode->epoch;
3429 unsigned int new_state;
3431 if (epoch > old_epoch) {
3432 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3433 cinode->epoch = epoch;
3436 new_state = cinode->oplock;
3437 *purge_cache = false;
3439 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3440 (new_state & CIFS_CACHE_READ_FLG) == 0)
3441 *purge_cache = true;
3442 else if (old_state == new_state && (epoch - old_epoch > 1))
3443 *purge_cache = true;
3447 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3448 unsigned int epoch, bool *purge_cache)
3451 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3453 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3454 cinode->oplock = CIFS_CACHE_RHW_FLG;
3455 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3456 &cinode->vfs_inode);
3457 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3458 cinode->oplock = CIFS_CACHE_RW_FLG;
3459 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3460 &cinode->vfs_inode);
3461 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3462 cinode->oplock = CIFS_CACHE_READ_FLG;
3463 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3464 &cinode->vfs_inode);
3470 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3471 unsigned int epoch, bool *purge_cache)
3473 char message[5] = {0};
3474 unsigned int new_oplock = 0;
3477 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3480 /* Check if the server granted an oplock rather than a lease */
3481 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3482 return smb2_set_oplock_level(cinode, oplock, epoch,
3485 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3486 new_oplock |= CIFS_CACHE_READ_FLG;
3487 strcat(message, "R");
3489 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3490 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3491 strcat(message, "H");
3493 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3494 new_oplock |= CIFS_CACHE_WRITE_FLG;
3495 strcat(message, "W");
3498 strncpy(message, "None", sizeof(message));
3500 cinode->oplock = new_oplock;
3501 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3502 &cinode->vfs_inode);
3506 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3507 unsigned int epoch, bool *purge_cache)
3509 unsigned int old_oplock = cinode->oplock;
3511 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3514 *purge_cache = false;
3515 if (old_oplock == CIFS_CACHE_READ_FLG) {
3516 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3517 (epoch - cinode->epoch > 0))
3518 *purge_cache = true;
3519 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3520 (epoch - cinode->epoch > 1))
3521 *purge_cache = true;
3522 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3523 (epoch - cinode->epoch > 1))
3524 *purge_cache = true;
3525 else if (cinode->oplock == 0 &&
3526 (epoch - cinode->epoch > 0))
3527 *purge_cache = true;
3528 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3529 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3530 (epoch - cinode->epoch > 0))
3531 *purge_cache = true;
3532 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3533 (epoch - cinode->epoch > 1))
3534 *purge_cache = true;
3536 cinode->epoch = epoch;
3541 smb2_is_read_op(__u32 oplock)
3543 return oplock == SMB2_OPLOCK_LEVEL_II;
3547 smb21_is_read_op(__u32 oplock)
3549 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3550 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3554 map_oplock_to_lease(u8 oplock)
3556 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3557 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3558 else if (oplock == SMB2_OPLOCK_LEVEL_II)
3559 return SMB2_LEASE_READ_CACHING;
3560 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3561 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3562 SMB2_LEASE_WRITE_CACHING;
3567 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3569 struct create_lease *buf;
3571 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3575 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3576 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3578 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3579 (struct create_lease, lcontext));
3580 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3581 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3582 (struct create_lease, Name));
3583 buf->ccontext.NameLength = cpu_to_le16(4);
3584 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3593 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3595 struct create_lease_v2 *buf;
3597 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3601 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3602 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3604 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3605 (struct create_lease_v2, lcontext));
3606 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3607 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3608 (struct create_lease_v2, Name));
3609 buf->ccontext.NameLength = cpu_to_le16(4);
3610 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3619 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3621 struct create_lease *lc = (struct create_lease *)buf;
3623 *epoch = 0; /* not used */
3624 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3625 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3626 return le32_to_cpu(lc->lcontext.LeaseState);
3630 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3632 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3634 *epoch = le16_to_cpu(lc->lcontext.Epoch);
3635 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3636 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3638 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3639 return le32_to_cpu(lc->lcontext.LeaseState);
3643 smb2_wp_retry_size(struct inode *inode)
3645 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3646 SMB2_MAX_BUFFER_SIZE);
3650 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3652 return !cfile->invalidHandle;
3656 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3657 struct smb_rqst *old_rq, __le16 cipher_type)
3659 struct smb2_sync_hdr *shdr =
3660 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3662 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3663 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3664 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3665 tr_hdr->Flags = cpu_to_le16(0x01);
3666 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3667 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3669 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3670 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3673 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3674 * stack object as buf.
3676 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3677 unsigned int buflen)
3681 * VMAP_STACK (at least) puts stack into the vmalloc address space
3683 if (is_vmalloc_addr(buf))
3684 addr = vmalloc_to_page(buf);
3686 addr = virt_to_page(buf);
3687 sg_set_page(sg, addr, buflen, offset_in_page(buf));
3690 /* Assumes the first rqst has a transform header as the first iov.
3692 * rqst[0].rq_iov[0] is transform header
3693 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3694 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3696 static struct scatterlist *
3697 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3699 unsigned int sg_len;
3700 struct scatterlist *sg;
3703 unsigned int idx = 0;
3707 for (i = 0; i < num_rqst; i++)
3708 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3710 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3714 sg_init_table(sg, sg_len);
3715 for (i = 0; i < num_rqst; i++) {
3716 for (j = 0; j < rqst[i].rq_nvec; j++) {
3718 * The first rqst has a transform header where the
3719 * first 20 bytes are not part of the encrypted blob
3721 skip = (i == 0) && (j == 0) ? 20 : 0;
3722 smb2_sg_set_buf(&sg[idx++],
3723 rqst[i].rq_iov[j].iov_base + skip,
3724 rqst[i].rq_iov[j].iov_len - skip);
3727 for (j = 0; j < rqst[i].rq_npages; j++) {
3728 unsigned int len, offset;
3730 rqst_page_get_length(&rqst[i], j, &len, &offset);
3731 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3734 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3739 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3741 struct cifs_ses *ses;
3744 spin_lock(&cifs_tcp_ses_lock);
3745 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3746 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3747 if (ses->Suid == ses_id) {
3748 ses_enc_key = enc ? ses->smb3encryptionkey :
3749 ses->smb3decryptionkey;
3750 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3751 spin_unlock(&cifs_tcp_ses_lock);
3756 spin_unlock(&cifs_tcp_ses_lock);
3761 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3762 * iov[0] - transform header (associate data),
3763 * iov[1-N] - SMB2 header and pages - data to encrypt.
3764 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3768 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3769 struct smb_rqst *rqst, int enc)
3771 struct smb2_transform_hdr *tr_hdr =
3772 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3773 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3775 struct scatterlist *sg;
3776 u8 sign[SMB2_SIGNATURE_SIZE] = {};
3777 u8 key[SMB3_SIGN_KEY_SIZE];
3778 struct aead_request *req;
3780 unsigned int iv_len;
3781 DECLARE_CRYPTO_WAIT(wait);
3782 struct crypto_aead *tfm;
3783 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3785 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3787 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3792 rc = smb3_crypto_aead_allocate(server);
3794 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3798 tfm = enc ? server->secmech.ccmaesencrypt :
3799 server->secmech.ccmaesdecrypt;
3800 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3802 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3806 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3808 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3812 req = aead_request_alloc(tfm, GFP_KERNEL);
3814 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3819 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3820 crypt_len += SMB2_SIGNATURE_SIZE;
3823 sg = init_sg(num_rqst, rqst, sign);
3825 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3830 iv_len = crypto_aead_ivsize(tfm);
3831 iv = kzalloc(iv_len, GFP_KERNEL);
3833 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3838 if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3839 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3842 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3845 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3846 aead_request_set_ad(req, assoc_data_len);
3848 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3849 crypto_req_done, &wait);
3851 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3852 : crypto_aead_decrypt(req), &wait);
3855 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3866 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3870 for (i = 0; i < num_rqst; i++) {
3871 if (rqst[i].rq_pages) {
3872 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3873 put_page(rqst[i].rq_pages[j]);
3874 kfree(rqst[i].rq_pages);
3880 * This function will initialize new_rq and encrypt the content.
3881 * The first entry, new_rq[0], only contains a single iov which contains
3882 * a smb2_transform_hdr and is pre-allocated by the caller.
3883 * This function then populates new_rq[1+] with the content from olq_rq[0+].
3885 * The end result is an array of smb_rqst structures where the first structure
3886 * only contains a single iov for the transform header which we then can pass
3887 * to crypt_message().
3889 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
3890 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3893 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3894 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3896 struct page **pages;
3897 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3898 unsigned int npages;
3899 unsigned int orig_len = 0;
3903 for (i = 1; i < num_rqst; i++) {
3904 npages = old_rq[i - 1].rq_npages;
3905 pages = kmalloc_array(npages, sizeof(struct page *),
3910 new_rq[i].rq_pages = pages;
3911 new_rq[i].rq_npages = npages;
3912 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3913 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3914 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3915 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3916 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3918 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3920 for (j = 0; j < npages; j++) {
3921 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3926 /* copy pages form the old */
3927 for (j = 0; j < npages; j++) {
3929 unsigned int offset, len;
3931 rqst_page_get_length(&new_rq[i], j, &len, &offset);
3933 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3934 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3936 memcpy(dst, src, len);
3937 kunmap(new_rq[i].rq_pages[j]);
3938 kunmap(old_rq[i - 1].rq_pages[j]);
3942 /* fill the 1st iov with a transform header */
3943 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
3945 rc = crypt_message(server, num_rqst, new_rq, 1);
3946 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
3953 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3958 smb3_is_transform_hdr(void *buf)
3960 struct smb2_transform_hdr *trhdr = buf;
3962 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3966 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3967 unsigned int buf_data_size, struct page **pages,
3968 unsigned int npages, unsigned int page_data_size)
3971 struct smb_rqst rqst = {NULL};
3974 iov[0].iov_base = buf;
3975 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3976 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3977 iov[1].iov_len = buf_data_size;
3981 rqst.rq_pages = pages;
3982 rqst.rq_npages = npages;
3983 rqst.rq_pagesz = PAGE_SIZE;
3984 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3986 rc = crypt_message(server, 1, &rqst, 0);
3987 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
3992 memmove(buf, iov[1].iov_base, buf_data_size);
3994 server->total_read = buf_data_size + page_data_size;
4000 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4001 unsigned int npages, unsigned int len)
4006 for (i = 0; i < npages; i++) {
4007 struct page *page = pages[i];
4011 if (len >= PAGE_SIZE) {
4012 /* enough data to fill the page */
4016 zero_user(page, len, PAGE_SIZE - len);
4019 length = cifs_read_page_from_socket(server, page, 0, n);
4022 server->total_read += length;
4029 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4030 unsigned int cur_off, struct bio_vec **page_vec)
4032 struct bio_vec *bvec;
4035 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4039 for (i = 0; i < npages; i++) {
4040 bvec[i].bv_page = pages[i];
4041 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4042 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4043 data_size -= bvec[i].bv_len;
4046 if (data_size != 0) {
4047 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4057 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4058 char *buf, unsigned int buf_len, struct page **pages,
4059 unsigned int npages, unsigned int page_data_size)
4061 unsigned int data_offset;
4062 unsigned int data_len;
4063 unsigned int cur_off;
4064 unsigned int cur_page_idx;
4065 unsigned int pad_len;
4066 struct cifs_readdata *rdata = mid->callback_data;
4067 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4068 struct bio_vec *bvec = NULL;
4069 struct iov_iter iter;
4072 bool use_rdma_mr = false;
4074 if (shdr->Command != SMB2_READ) {
4075 cifs_server_dbg(VFS, "only big read responses are supported\n");
4079 if (server->ops->is_session_expired &&
4080 server->ops->is_session_expired(buf)) {
4081 cifs_reconnect(server);
4082 wake_up(&server->response_q);
4086 if (server->ops->is_status_pending &&
4087 server->ops->is_status_pending(buf, server))
4090 /* set up first two iov to get credits */
4091 rdata->iov[0].iov_base = buf;
4092 rdata->iov[0].iov_len = 0;
4093 rdata->iov[1].iov_base = buf;
4094 rdata->iov[1].iov_len =
4095 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4096 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4097 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4098 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4099 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4101 rdata->result = server->ops->map_error(buf, true);
4102 if (rdata->result != 0) {
4103 cifs_dbg(FYI, "%s: server returned error %d\n",
4104 __func__, rdata->result);
4105 /* normal error on read response */
4106 dequeue_mid(mid, false);
4110 data_offset = server->ops->read_data_offset(buf);
4111 #ifdef CONFIG_CIFS_SMB_DIRECT
4112 use_rdma_mr = rdata->mr;
4114 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4116 if (data_offset < server->vals->read_rsp_size) {
4118 * win2k8 sometimes sends an offset of 0 when the read
4119 * is beyond the EOF. Treat it as if the data starts just after
4122 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4123 __func__, data_offset);
4124 data_offset = server->vals->read_rsp_size;
4125 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4126 /* data_offset is beyond the end of smallbuf */
4127 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4128 __func__, data_offset);
4129 rdata->result = -EIO;
4130 dequeue_mid(mid, rdata->result);
4134 pad_len = data_offset - server->vals->read_rsp_size;
4136 if (buf_len <= data_offset) {
4137 /* read response payload is in pages */
4138 cur_page_idx = pad_len / PAGE_SIZE;
4139 cur_off = pad_len % PAGE_SIZE;
4141 if (cur_page_idx != 0) {
4142 /* data offset is beyond the 1st page of response */
4143 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4144 __func__, data_offset);
4145 rdata->result = -EIO;
4146 dequeue_mid(mid, rdata->result);
4150 if (data_len > page_data_size - pad_len) {
4151 /* data_len is corrupt -- discard frame */
4152 rdata->result = -EIO;
4153 dequeue_mid(mid, rdata->result);
4157 rdata->result = init_read_bvec(pages, npages, page_data_size,
4159 if (rdata->result != 0) {
4160 dequeue_mid(mid, rdata->result);
4164 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4165 } else if (buf_len >= data_offset + data_len) {
4166 /* read response payload is in buf */
4167 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4168 iov.iov_base = buf + data_offset;
4169 iov.iov_len = data_len;
4170 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4172 /* read response payload cannot be in both buf and pages */
4173 WARN_ONCE(1, "buf can not contain only a part of read data");
4174 rdata->result = -EIO;
4175 dequeue_mid(mid, rdata->result);
4179 length = rdata->copy_into_pages(server, rdata, &iter);
4186 dequeue_mid(mid, false);
4190 struct smb2_decrypt_work {
4191 struct work_struct decrypt;
4192 struct TCP_Server_Info *server;
4193 struct page **ppages;
4195 unsigned int npages;
4200 static void smb2_decrypt_offload(struct work_struct *work)
4202 struct smb2_decrypt_work *dw = container_of(work,
4203 struct smb2_decrypt_work, decrypt);
4205 struct mid_q_entry *mid;
4207 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4208 dw->ppages, dw->npages, dw->len);
4210 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4214 dw->server->lstrp = jiffies;
4215 mid = smb2_find_mid(dw->server, dw->buf);
4217 cifs_dbg(FYI, "mid not found\n");
4219 mid->decrypted = true;
4220 rc = handle_read_data(dw->server, mid, dw->buf,
4221 dw->server->vals->read_rsp_size,
4222 dw->ppages, dw->npages, dw->len);
4224 cifs_mid_q_entry_release(mid);
4228 for (i = dw->npages-1; i >= 0; i--)
4229 put_page(dw->ppages[i]);
4232 cifs_small_buf_release(dw->buf);
4238 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4241 char *buf = server->smallbuf;
4242 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4243 unsigned int npages;
4244 struct page **pages;
4246 unsigned int buflen = server->pdu_size;
4249 struct smb2_decrypt_work *dw;
4252 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4253 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4255 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4258 server->total_read += rc;
4260 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4261 server->vals->read_rsp_size;
4262 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4264 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4270 for (; i < npages; i++) {
4271 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4278 /* read read data into pages */
4279 rc = read_data_into_pages(server, pages, npages, len);
4283 rc = cifs_discard_remaining_data(server);
4288 * For large reads, offload to different thread for better performance,
4289 * use more cores decrypting which can be expensive
4292 if ((server->min_offload) && (server->in_flight > 1) &&
4293 (server->pdu_size >= server->min_offload)) {
4294 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4296 goto non_offloaded_decrypt;
4298 dw->buf = server->smallbuf;
4299 server->smallbuf = (char *)cifs_small_buf_get();
4301 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4303 dw->npages = npages;
4304 dw->server = server;
4307 queue_work(decrypt_wq, &dw->decrypt);
4308 *num_mids = 0; /* worker thread takes care of finding mid */
4312 non_offloaded_decrypt:
4313 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4314 pages, npages, len);
4318 *mid = smb2_find_mid(server, buf);
4320 cifs_dbg(FYI, "mid not found\n");
4322 cifs_dbg(FYI, "mid found\n");
4323 (*mid)->decrypted = true;
4324 rc = handle_read_data(server, *mid, buf,
4325 server->vals->read_rsp_size,
4326 pages, npages, len);
4330 for (i = i - 1; i >= 0; i--)
4335 cifs_discard_remaining_data(server);
4340 receive_encrypted_standard(struct TCP_Server_Info *server,
4341 struct mid_q_entry **mids, char **bufs,
4345 char *buf = server->smallbuf;
4346 struct smb2_sync_hdr *shdr;
4347 unsigned int pdu_length = server->pdu_size;
4348 unsigned int buf_size;
4349 struct mid_q_entry *mid_entry;
4351 char *next_buffer = NULL;
4355 /* switch to large buffer if too big for a small one */
4356 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4357 server->large_buf = true;
4358 memcpy(server->bigbuf, buf, server->total_read);
4359 buf = server->bigbuf;
4362 /* now read the rest */
4363 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4364 pdu_length - HEADER_SIZE(server) + 1);
4367 server->total_read += length;
4369 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4370 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4374 next_is_large = server->large_buf;
4376 shdr = (struct smb2_sync_hdr *)buf;
4377 if (shdr->NextCommand) {
4379 next_buffer = (char *)cifs_buf_get();
4381 next_buffer = (char *)cifs_small_buf_get();
4383 buf + le32_to_cpu(shdr->NextCommand),
4384 pdu_length - le32_to_cpu(shdr->NextCommand));
4387 mid_entry = smb2_find_mid(server, buf);
4388 if (mid_entry == NULL)
4389 cifs_dbg(FYI, "mid not found\n");
4391 cifs_dbg(FYI, "mid found\n");
4392 mid_entry->decrypted = true;
4393 mid_entry->resp_buf_size = server->pdu_size;
4396 if (*num_mids >= MAX_COMPOUND) {
4397 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4400 bufs[*num_mids] = buf;
4401 mids[(*num_mids)++] = mid_entry;
4403 if (mid_entry && mid_entry->handle)
4404 ret = mid_entry->handle(server, mid_entry);
4406 ret = cifs_handle_standard(server, mid_entry);
4408 if (ret == 0 && shdr->NextCommand) {
4409 pdu_length -= le32_to_cpu(shdr->NextCommand);
4410 server->large_buf = next_is_large;
4412 server->bigbuf = buf = next_buffer;
4414 server->smallbuf = buf = next_buffer;
4416 } else if (ret != 0) {
4418 * ret != 0 here means that we didn't get to handle_mid() thus
4419 * server->smallbuf and server->bigbuf are still valid. We need
4420 * to free next_buffer because it is not going to be used
4424 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4426 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4433 smb3_receive_transform(struct TCP_Server_Info *server,
4434 struct mid_q_entry **mids, char **bufs, int *num_mids)
4436 char *buf = server->smallbuf;
4437 unsigned int pdu_length = server->pdu_size;
4438 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4439 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4441 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4442 sizeof(struct smb2_sync_hdr)) {
4443 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4445 cifs_reconnect(server);
4446 wake_up(&server->response_q);
4447 return -ECONNABORTED;
4450 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4451 cifs_server_dbg(VFS, "Transform message is broken\n");
4452 cifs_reconnect(server);
4453 wake_up(&server->response_q);
4454 return -ECONNABORTED;
4457 /* TODO: add support for compounds containing READ. */
4458 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4459 return receive_encrypted_read(server, &mids[0], num_mids);
4462 return receive_encrypted_standard(server, mids, bufs, num_mids);
4466 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4468 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4470 return handle_read_data(server, mid, buf, server->pdu_size,
4475 smb2_next_header(char *buf)
4477 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4478 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4480 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4481 return sizeof(struct smb2_transform_hdr) +
4482 le32_to_cpu(t_hdr->OriginalMessageSize);
4484 return le32_to_cpu(hdr->NextCommand);
4488 smb2_make_node(unsigned int xid, struct inode *inode,
4489 struct dentry *dentry, struct cifs_tcon *tcon,
4490 char *full_path, umode_t mode, dev_t dev)
4492 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4494 int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
4495 FILE_ALL_INFO *buf = NULL;
4496 struct cifs_io_parms io_parms;
4498 struct cifs_fid fid;
4499 struct cifs_open_parms oparms;
4500 unsigned int bytes_written;
4501 struct win_dev *pdev;
4505 * Check if mounted with mount parm 'sfu' mount parm.
4506 * SFU emulation should work with all servers, but only
4507 * supports block and char device (no socket & fifo),
4508 * and was used by default in earlier versions of Windows
4510 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4514 * TODO: Add ability to create instead via reparse point. Windows (e.g.
4515 * their current NFS server) uses this approach to expose special files
4516 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4519 if (!S_ISCHR(mode) && !S_ISBLK(mode))
4522 cifs_dbg(FYI, "sfu compat create special file\n");
4524 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4530 if (backup_cred(cifs_sb))
4531 create_options |= CREATE_OPEN_BACKUP_INTENT;
4534 oparms.cifs_sb = cifs_sb;
4535 oparms.desired_access = GENERIC_WRITE;
4536 oparms.create_options = create_options;
4537 oparms.disposition = FILE_CREATE;
4538 oparms.path = full_path;
4540 oparms.reconnect = false;
4542 if (tcon->ses->server->oplocks)
4543 oplock = REQ_OPLOCK;
4546 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4551 * BB Do not bother to decode buf since no local inode yet to put
4552 * timestamps in, but we can reuse it safely.
4555 pdev = (struct win_dev *)buf;
4556 io_parms.pid = current->tgid;
4557 io_parms.tcon = tcon;
4558 io_parms.offset = 0;
4559 io_parms.length = sizeof(struct win_dev);
4560 iov[1].iov_base = buf;
4561 iov[1].iov_len = sizeof(struct win_dev);
4562 if (S_ISCHR(mode)) {
4563 memcpy(pdev->type, "IntxCHR", 8);
4564 pdev->major = cpu_to_le64(MAJOR(dev));
4565 pdev->minor = cpu_to_le64(MINOR(dev));
4566 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4567 &bytes_written, iov, 1);
4568 } else if (S_ISBLK(mode)) {
4569 memcpy(pdev->type, "IntxBLK", 8);
4570 pdev->major = cpu_to_le64(MAJOR(dev));
4571 pdev->minor = cpu_to_le64(MINOR(dev));
4572 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4573 &bytes_written, iov, 1);
4575 tcon->ses->server->ops->close(xid, tcon, &fid);
4578 /* FIXME: add code here to set EAs */
4585 struct smb_version_operations smb20_operations = {
4586 .compare_fids = smb2_compare_fids,
4587 .setup_request = smb2_setup_request,
4588 .setup_async_request = smb2_setup_async_request,
4589 .check_receive = smb2_check_receive,
4590 .add_credits = smb2_add_credits,
4591 .set_credits = smb2_set_credits,
4592 .get_credits_field = smb2_get_credits_field,
4593 .get_credits = smb2_get_credits,
4594 .wait_mtu_credits = cifs_wait_mtu_credits,
4595 .get_next_mid = smb2_get_next_mid,
4596 .revert_current_mid = smb2_revert_current_mid,
4597 .read_data_offset = smb2_read_data_offset,
4598 .read_data_length = smb2_read_data_length,
4599 .map_error = map_smb2_to_linux_error,
4600 .find_mid = smb2_find_mid,
4601 .check_message = smb2_check_message,
4602 .dump_detail = smb2_dump_detail,
4603 .clear_stats = smb2_clear_stats,
4604 .print_stats = smb2_print_stats,
4605 .is_oplock_break = smb2_is_valid_oplock_break,
4606 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4607 .downgrade_oplock = smb2_downgrade_oplock,
4608 .need_neg = smb2_need_neg,
4609 .negotiate = smb2_negotiate,
4610 .negotiate_wsize = smb2_negotiate_wsize,
4611 .negotiate_rsize = smb2_negotiate_rsize,
4612 .sess_setup = SMB2_sess_setup,
4613 .logoff = SMB2_logoff,
4614 .tree_connect = SMB2_tcon,
4615 .tree_disconnect = SMB2_tdis,
4616 .qfs_tcon = smb2_qfs_tcon,
4617 .is_path_accessible = smb2_is_path_accessible,
4618 .can_echo = smb2_can_echo,
4620 .query_path_info = smb2_query_path_info,
4621 .get_srv_inum = smb2_get_srv_inum,
4622 .query_file_info = smb2_query_file_info,
4623 .set_path_size = smb2_set_path_size,
4624 .set_file_size = smb2_set_file_size,
4625 .set_file_info = smb2_set_file_info,
4626 .set_compression = smb2_set_compression,
4627 .mkdir = smb2_mkdir,
4628 .mkdir_setinfo = smb2_mkdir_setinfo,
4629 .rmdir = smb2_rmdir,
4630 .unlink = smb2_unlink,
4631 .rename = smb2_rename_path,
4632 .create_hardlink = smb2_create_hardlink,
4633 .query_symlink = smb2_query_symlink,
4634 .query_mf_symlink = smb3_query_mf_symlink,
4635 .create_mf_symlink = smb3_create_mf_symlink,
4636 .open = smb2_open_file,
4637 .set_fid = smb2_set_fid,
4638 .close = smb2_close_file,
4639 .flush = smb2_flush_file,
4640 .async_readv = smb2_async_readv,
4641 .async_writev = smb2_async_writev,
4642 .sync_read = smb2_sync_read,
4643 .sync_write = smb2_sync_write,
4644 .query_dir_first = smb2_query_dir_first,
4645 .query_dir_next = smb2_query_dir_next,
4646 .close_dir = smb2_close_dir,
4647 .calc_smb_size = smb2_calc_size,
4648 .is_status_pending = smb2_is_status_pending,
4649 .is_session_expired = smb2_is_session_expired,
4650 .oplock_response = smb2_oplock_response,
4651 .queryfs = smb2_queryfs,
4652 .mand_lock = smb2_mand_lock,
4653 .mand_unlock_range = smb2_unlock_range,
4654 .push_mand_locks = smb2_push_mandatory_locks,
4655 .get_lease_key = smb2_get_lease_key,
4656 .set_lease_key = smb2_set_lease_key,
4657 .new_lease_key = smb2_new_lease_key,
4658 .calc_signature = smb2_calc_signature,
4659 .is_read_op = smb2_is_read_op,
4660 .set_oplock_level = smb2_set_oplock_level,
4661 .create_lease_buf = smb2_create_lease_buf,
4662 .parse_lease_buf = smb2_parse_lease_buf,
4663 .copychunk_range = smb2_copychunk_range,
4664 .wp_retry_size = smb2_wp_retry_size,
4665 .dir_needs_close = smb2_dir_needs_close,
4666 .get_dfs_refer = smb2_get_dfs_refer,
4667 .select_sectype = smb2_select_sectype,
4668 #ifdef CONFIG_CIFS_XATTR
4669 .query_all_EAs = smb2_query_eas,
4670 .set_EA = smb2_set_ea,
4671 #endif /* CIFS_XATTR */
4672 .get_acl = get_smb2_acl,
4673 .get_acl_by_fid = get_smb2_acl_by_fid,
4674 .set_acl = set_smb2_acl,
4675 .next_header = smb2_next_header,
4676 .ioctl_query_info = smb2_ioctl_query_info,
4677 .make_node = smb2_make_node,
4678 .fiemap = smb3_fiemap,
4679 .llseek = smb3_llseek,
4682 struct smb_version_operations smb21_operations = {
4683 .compare_fids = smb2_compare_fids,
4684 .setup_request = smb2_setup_request,
4685 .setup_async_request = smb2_setup_async_request,
4686 .check_receive = smb2_check_receive,
4687 .add_credits = smb2_add_credits,
4688 .set_credits = smb2_set_credits,
4689 .get_credits_field = smb2_get_credits_field,
4690 .get_credits = smb2_get_credits,
4691 .wait_mtu_credits = smb2_wait_mtu_credits,
4692 .adjust_credits = smb2_adjust_credits,
4693 .get_next_mid = smb2_get_next_mid,
4694 .revert_current_mid = smb2_revert_current_mid,
4695 .read_data_offset = smb2_read_data_offset,
4696 .read_data_length = smb2_read_data_length,
4697 .map_error = map_smb2_to_linux_error,
4698 .find_mid = smb2_find_mid,
4699 .check_message = smb2_check_message,
4700 .dump_detail = smb2_dump_detail,
4701 .clear_stats = smb2_clear_stats,
4702 .print_stats = smb2_print_stats,
4703 .is_oplock_break = smb2_is_valid_oplock_break,
4704 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4705 .downgrade_oplock = smb2_downgrade_oplock,
4706 .need_neg = smb2_need_neg,
4707 .negotiate = smb2_negotiate,
4708 .negotiate_wsize = smb2_negotiate_wsize,
4709 .negotiate_rsize = smb2_negotiate_rsize,
4710 .sess_setup = SMB2_sess_setup,
4711 .logoff = SMB2_logoff,
4712 .tree_connect = SMB2_tcon,
4713 .tree_disconnect = SMB2_tdis,
4714 .qfs_tcon = smb2_qfs_tcon,
4715 .is_path_accessible = smb2_is_path_accessible,
4716 .can_echo = smb2_can_echo,
4718 .query_path_info = smb2_query_path_info,
4719 .get_srv_inum = smb2_get_srv_inum,
4720 .query_file_info = smb2_query_file_info,
4721 .set_path_size = smb2_set_path_size,
4722 .set_file_size = smb2_set_file_size,
4723 .set_file_info = smb2_set_file_info,
4724 .set_compression = smb2_set_compression,
4725 .mkdir = smb2_mkdir,
4726 .mkdir_setinfo = smb2_mkdir_setinfo,
4727 .rmdir = smb2_rmdir,
4728 .unlink = smb2_unlink,
4729 .rename = smb2_rename_path,
4730 .create_hardlink = smb2_create_hardlink,
4731 .query_symlink = smb2_query_symlink,
4732 .query_mf_symlink = smb3_query_mf_symlink,
4733 .create_mf_symlink = smb3_create_mf_symlink,
4734 .open = smb2_open_file,
4735 .set_fid = smb2_set_fid,
4736 .close = smb2_close_file,
4737 .flush = smb2_flush_file,
4738 .async_readv = smb2_async_readv,
4739 .async_writev = smb2_async_writev,
4740 .sync_read = smb2_sync_read,
4741 .sync_write = smb2_sync_write,
4742 .query_dir_first = smb2_query_dir_first,
4743 .query_dir_next = smb2_query_dir_next,
4744 .close_dir = smb2_close_dir,
4745 .calc_smb_size = smb2_calc_size,
4746 .is_status_pending = smb2_is_status_pending,
4747 .is_session_expired = smb2_is_session_expired,
4748 .oplock_response = smb2_oplock_response,
4749 .queryfs = smb2_queryfs,
4750 .mand_lock = smb2_mand_lock,
4751 .mand_unlock_range = smb2_unlock_range,
4752 .push_mand_locks = smb2_push_mandatory_locks,
4753 .get_lease_key = smb2_get_lease_key,
4754 .set_lease_key = smb2_set_lease_key,
4755 .new_lease_key = smb2_new_lease_key,
4756 .calc_signature = smb2_calc_signature,
4757 .is_read_op = smb21_is_read_op,
4758 .set_oplock_level = smb21_set_oplock_level,
4759 .create_lease_buf = smb2_create_lease_buf,
4760 .parse_lease_buf = smb2_parse_lease_buf,
4761 .copychunk_range = smb2_copychunk_range,
4762 .wp_retry_size = smb2_wp_retry_size,
4763 .dir_needs_close = smb2_dir_needs_close,
4764 .enum_snapshots = smb3_enum_snapshots,
4765 .get_dfs_refer = smb2_get_dfs_refer,
4766 .select_sectype = smb2_select_sectype,
4767 #ifdef CONFIG_CIFS_XATTR
4768 .query_all_EAs = smb2_query_eas,
4769 .set_EA = smb2_set_ea,
4770 #endif /* CIFS_XATTR */
4771 .get_acl = get_smb2_acl,
4772 .get_acl_by_fid = get_smb2_acl_by_fid,
4773 .set_acl = set_smb2_acl,
4774 .next_header = smb2_next_header,
4775 .ioctl_query_info = smb2_ioctl_query_info,
4776 .make_node = smb2_make_node,
4777 .fiemap = smb3_fiemap,
4778 .llseek = smb3_llseek,
4781 struct smb_version_operations smb30_operations = {
4782 .compare_fids = smb2_compare_fids,
4783 .setup_request = smb2_setup_request,
4784 .setup_async_request = smb2_setup_async_request,
4785 .check_receive = smb2_check_receive,
4786 .add_credits = smb2_add_credits,
4787 .set_credits = smb2_set_credits,
4788 .get_credits_field = smb2_get_credits_field,
4789 .get_credits = smb2_get_credits,
4790 .wait_mtu_credits = smb2_wait_mtu_credits,
4791 .adjust_credits = smb2_adjust_credits,
4792 .get_next_mid = smb2_get_next_mid,
4793 .revert_current_mid = smb2_revert_current_mid,
4794 .read_data_offset = smb2_read_data_offset,
4795 .read_data_length = smb2_read_data_length,
4796 .map_error = map_smb2_to_linux_error,
4797 .find_mid = smb2_find_mid,
4798 .check_message = smb2_check_message,
4799 .dump_detail = smb2_dump_detail,
4800 .clear_stats = smb2_clear_stats,
4801 .print_stats = smb2_print_stats,
4802 .dump_share_caps = smb2_dump_share_caps,
4803 .is_oplock_break = smb2_is_valid_oplock_break,
4804 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4805 .downgrade_oplock = smb3_downgrade_oplock,
4806 .need_neg = smb2_need_neg,
4807 .negotiate = smb2_negotiate,
4808 .negotiate_wsize = smb3_negotiate_wsize,
4809 .negotiate_rsize = smb3_negotiate_rsize,
4810 .sess_setup = SMB2_sess_setup,
4811 .logoff = SMB2_logoff,
4812 .tree_connect = SMB2_tcon,
4813 .tree_disconnect = SMB2_tdis,
4814 .qfs_tcon = smb3_qfs_tcon,
4815 .is_path_accessible = smb2_is_path_accessible,
4816 .can_echo = smb2_can_echo,
4818 .query_path_info = smb2_query_path_info,
4819 .get_srv_inum = smb2_get_srv_inum,
4820 .query_file_info = smb2_query_file_info,
4821 .set_path_size = smb2_set_path_size,
4822 .set_file_size = smb2_set_file_size,
4823 .set_file_info = smb2_set_file_info,
4824 .set_compression = smb2_set_compression,
4825 .mkdir = smb2_mkdir,
4826 .mkdir_setinfo = smb2_mkdir_setinfo,
4827 .rmdir = smb2_rmdir,
4828 .unlink = smb2_unlink,
4829 .rename = smb2_rename_path,
4830 .create_hardlink = smb2_create_hardlink,
4831 .query_symlink = smb2_query_symlink,
4832 .query_mf_symlink = smb3_query_mf_symlink,
4833 .create_mf_symlink = smb3_create_mf_symlink,
4834 .open = smb2_open_file,
4835 .set_fid = smb2_set_fid,
4836 .close = smb2_close_file,
4837 .close_getattr = smb2_close_getattr,
4838 .flush = smb2_flush_file,
4839 .async_readv = smb2_async_readv,
4840 .async_writev = smb2_async_writev,
4841 .sync_read = smb2_sync_read,
4842 .sync_write = smb2_sync_write,
4843 .query_dir_first = smb2_query_dir_first,
4844 .query_dir_next = smb2_query_dir_next,
4845 .close_dir = smb2_close_dir,
4846 .calc_smb_size = smb2_calc_size,
4847 .is_status_pending = smb2_is_status_pending,
4848 .is_session_expired = smb2_is_session_expired,
4849 .oplock_response = smb2_oplock_response,
4850 .queryfs = smb2_queryfs,
4851 .mand_lock = smb2_mand_lock,
4852 .mand_unlock_range = smb2_unlock_range,
4853 .push_mand_locks = smb2_push_mandatory_locks,
4854 .get_lease_key = smb2_get_lease_key,
4855 .set_lease_key = smb2_set_lease_key,
4856 .new_lease_key = smb2_new_lease_key,
4857 .generate_signingkey = generate_smb30signingkey,
4858 .calc_signature = smb3_calc_signature,
4859 .set_integrity = smb3_set_integrity,
4860 .is_read_op = smb21_is_read_op,
4861 .set_oplock_level = smb3_set_oplock_level,
4862 .create_lease_buf = smb3_create_lease_buf,
4863 .parse_lease_buf = smb3_parse_lease_buf,
4864 .copychunk_range = smb2_copychunk_range,
4865 .duplicate_extents = smb2_duplicate_extents,
4866 .validate_negotiate = smb3_validate_negotiate,
4867 .wp_retry_size = smb2_wp_retry_size,
4868 .dir_needs_close = smb2_dir_needs_close,
4869 .fallocate = smb3_fallocate,
4870 .enum_snapshots = smb3_enum_snapshots,
4871 .init_transform_rq = smb3_init_transform_rq,
4872 .is_transform_hdr = smb3_is_transform_hdr,
4873 .receive_transform = smb3_receive_transform,
4874 .get_dfs_refer = smb2_get_dfs_refer,
4875 .select_sectype = smb2_select_sectype,
4876 #ifdef CONFIG_CIFS_XATTR
4877 .query_all_EAs = smb2_query_eas,
4878 .set_EA = smb2_set_ea,
4879 #endif /* CIFS_XATTR */
4880 .get_acl = get_smb2_acl,
4881 .get_acl_by_fid = get_smb2_acl_by_fid,
4882 .set_acl = set_smb2_acl,
4883 .next_header = smb2_next_header,
4884 .ioctl_query_info = smb2_ioctl_query_info,
4885 .make_node = smb2_make_node,
4886 .fiemap = smb3_fiemap,
4887 .llseek = smb3_llseek,
4890 struct smb_version_operations smb311_operations = {
4891 .compare_fids = smb2_compare_fids,
4892 .setup_request = smb2_setup_request,
4893 .setup_async_request = smb2_setup_async_request,
4894 .check_receive = smb2_check_receive,
4895 .add_credits = smb2_add_credits,
4896 .set_credits = smb2_set_credits,
4897 .get_credits_field = smb2_get_credits_field,
4898 .get_credits = smb2_get_credits,
4899 .wait_mtu_credits = smb2_wait_mtu_credits,
4900 .adjust_credits = smb2_adjust_credits,
4901 .get_next_mid = smb2_get_next_mid,
4902 .revert_current_mid = smb2_revert_current_mid,
4903 .read_data_offset = smb2_read_data_offset,
4904 .read_data_length = smb2_read_data_length,
4905 .map_error = map_smb2_to_linux_error,
4906 .find_mid = smb2_find_mid,
4907 .check_message = smb2_check_message,
4908 .dump_detail = smb2_dump_detail,
4909 .clear_stats = smb2_clear_stats,
4910 .print_stats = smb2_print_stats,
4911 .dump_share_caps = smb2_dump_share_caps,
4912 .is_oplock_break = smb2_is_valid_oplock_break,
4913 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4914 .downgrade_oplock = smb3_downgrade_oplock,
4915 .need_neg = smb2_need_neg,
4916 .negotiate = smb2_negotiate,
4917 .negotiate_wsize = smb3_negotiate_wsize,
4918 .negotiate_rsize = smb3_negotiate_rsize,
4919 .sess_setup = SMB2_sess_setup,
4920 .logoff = SMB2_logoff,
4921 .tree_connect = SMB2_tcon,
4922 .tree_disconnect = SMB2_tdis,
4923 .qfs_tcon = smb3_qfs_tcon,
4924 .is_path_accessible = smb2_is_path_accessible,
4925 .can_echo = smb2_can_echo,
4927 .query_path_info = smb2_query_path_info,
4928 .get_srv_inum = smb2_get_srv_inum,
4929 .query_file_info = smb2_query_file_info,
4930 .set_path_size = smb2_set_path_size,
4931 .set_file_size = smb2_set_file_size,
4932 .set_file_info = smb2_set_file_info,
4933 .set_compression = smb2_set_compression,
4934 .mkdir = smb2_mkdir,
4935 .mkdir_setinfo = smb2_mkdir_setinfo,
4936 .posix_mkdir = smb311_posix_mkdir,
4937 .rmdir = smb2_rmdir,
4938 .unlink = smb2_unlink,
4939 .rename = smb2_rename_path,
4940 .create_hardlink = smb2_create_hardlink,
4941 .query_symlink = smb2_query_symlink,
4942 .query_mf_symlink = smb3_query_mf_symlink,
4943 .create_mf_symlink = smb3_create_mf_symlink,
4944 .open = smb2_open_file,
4945 .set_fid = smb2_set_fid,
4946 .close = smb2_close_file,
4947 .close_getattr = smb2_close_getattr,
4948 .flush = smb2_flush_file,
4949 .async_readv = smb2_async_readv,
4950 .async_writev = smb2_async_writev,
4951 .sync_read = smb2_sync_read,
4952 .sync_write = smb2_sync_write,
4953 .query_dir_first = smb2_query_dir_first,
4954 .query_dir_next = smb2_query_dir_next,
4955 .close_dir = smb2_close_dir,
4956 .calc_smb_size = smb2_calc_size,
4957 .is_status_pending = smb2_is_status_pending,
4958 .is_session_expired = smb2_is_session_expired,
4959 .oplock_response = smb2_oplock_response,
4960 .queryfs = smb311_queryfs,
4961 .mand_lock = smb2_mand_lock,
4962 .mand_unlock_range = smb2_unlock_range,
4963 .push_mand_locks = smb2_push_mandatory_locks,
4964 .get_lease_key = smb2_get_lease_key,
4965 .set_lease_key = smb2_set_lease_key,
4966 .new_lease_key = smb2_new_lease_key,
4967 .generate_signingkey = generate_smb311signingkey,
4968 .calc_signature = smb3_calc_signature,
4969 .set_integrity = smb3_set_integrity,
4970 .is_read_op = smb21_is_read_op,
4971 .set_oplock_level = smb3_set_oplock_level,
4972 .create_lease_buf = smb3_create_lease_buf,
4973 .parse_lease_buf = smb3_parse_lease_buf,
4974 .copychunk_range = smb2_copychunk_range,
4975 .duplicate_extents = smb2_duplicate_extents,
4976 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4977 .wp_retry_size = smb2_wp_retry_size,
4978 .dir_needs_close = smb2_dir_needs_close,
4979 .fallocate = smb3_fallocate,
4980 .enum_snapshots = smb3_enum_snapshots,
4981 .init_transform_rq = smb3_init_transform_rq,
4982 .is_transform_hdr = smb3_is_transform_hdr,
4983 .receive_transform = smb3_receive_transform,
4984 .get_dfs_refer = smb2_get_dfs_refer,
4985 .select_sectype = smb2_select_sectype,
4986 #ifdef CONFIG_CIFS_XATTR
4987 .query_all_EAs = smb2_query_eas,
4988 .set_EA = smb2_set_ea,
4989 #endif /* CIFS_XATTR */
4990 .get_acl = get_smb2_acl,
4991 .get_acl_by_fid = get_smb2_acl_by_fid,
4992 .set_acl = set_smb2_acl,
4993 .next_header = smb2_next_header,
4994 .ioctl_query_info = smb2_ioctl_query_info,
4995 .make_node = smb2_make_node,
4996 .fiemap = smb3_fiemap,
4997 .llseek = smb3_llseek,
5000 struct smb_version_values smb20_values = {
5001 .version_string = SMB20_VERSION_STRING,
5002 .protocol_id = SMB20_PROT_ID,
5003 .req_capabilities = 0, /* MBZ */
5004 .large_lock_type = 0,
5005 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5006 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5007 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5008 .header_size = sizeof(struct smb2_sync_hdr),
5009 .header_preamble_size = 0,
5010 .max_header_size = MAX_SMB2_HDR_SIZE,
5011 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5012 .lock_cmd = SMB2_LOCK,
5014 .cap_nt_find = SMB2_NT_FIND,
5015 .cap_large_files = SMB2_LARGE_FILES,
5016 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5017 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5018 .create_lease_size = sizeof(struct create_lease),
5021 struct smb_version_values smb21_values = {
5022 .version_string = SMB21_VERSION_STRING,
5023 .protocol_id = SMB21_PROT_ID,
5024 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5025 .large_lock_type = 0,
5026 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5027 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5028 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5029 .header_size = sizeof(struct smb2_sync_hdr),
5030 .header_preamble_size = 0,
5031 .max_header_size = MAX_SMB2_HDR_SIZE,
5032 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5033 .lock_cmd = SMB2_LOCK,
5035 .cap_nt_find = SMB2_NT_FIND,
5036 .cap_large_files = SMB2_LARGE_FILES,
5037 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5038 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5039 .create_lease_size = sizeof(struct create_lease),
5042 struct smb_version_values smb3any_values = {
5043 .version_string = SMB3ANY_VERSION_STRING,
5044 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5045 .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,
5046 .large_lock_type = 0,
5047 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5048 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5049 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5050 .header_size = sizeof(struct smb2_sync_hdr),
5051 .header_preamble_size = 0,
5052 .max_header_size = MAX_SMB2_HDR_SIZE,
5053 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5054 .lock_cmd = SMB2_LOCK,
5056 .cap_nt_find = SMB2_NT_FIND,
5057 .cap_large_files = SMB2_LARGE_FILES,
5058 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5059 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5060 .create_lease_size = sizeof(struct create_lease_v2),
5063 struct smb_version_values smbdefault_values = {
5064 .version_string = SMBDEFAULT_VERSION_STRING,
5065 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5066 .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,
5067 .large_lock_type = 0,
5068 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5069 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5070 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5071 .header_size = sizeof(struct smb2_sync_hdr),
5072 .header_preamble_size = 0,
5073 .max_header_size = MAX_SMB2_HDR_SIZE,
5074 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5075 .lock_cmd = SMB2_LOCK,
5077 .cap_nt_find = SMB2_NT_FIND,
5078 .cap_large_files = SMB2_LARGE_FILES,
5079 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5080 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5081 .create_lease_size = sizeof(struct create_lease_v2),
5084 struct smb_version_values smb30_values = {
5085 .version_string = SMB30_VERSION_STRING,
5086 .protocol_id = SMB30_PROT_ID,
5087 .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,
5088 .large_lock_type = 0,
5089 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5090 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5091 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5092 .header_size = sizeof(struct smb2_sync_hdr),
5093 .header_preamble_size = 0,
5094 .max_header_size = MAX_SMB2_HDR_SIZE,
5095 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5096 .lock_cmd = SMB2_LOCK,
5098 .cap_nt_find = SMB2_NT_FIND,
5099 .cap_large_files = SMB2_LARGE_FILES,
5100 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5101 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5102 .create_lease_size = sizeof(struct create_lease_v2),
5105 struct smb_version_values smb302_values = {
5106 .version_string = SMB302_VERSION_STRING,
5107 .protocol_id = SMB302_PROT_ID,
5108 .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,
5109 .large_lock_type = 0,
5110 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5111 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5112 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5113 .header_size = sizeof(struct smb2_sync_hdr),
5114 .header_preamble_size = 0,
5115 .max_header_size = MAX_SMB2_HDR_SIZE,
5116 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5117 .lock_cmd = SMB2_LOCK,
5119 .cap_nt_find = SMB2_NT_FIND,
5120 .cap_large_files = SMB2_LARGE_FILES,
5121 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5122 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5123 .create_lease_size = sizeof(struct create_lease_v2),
5126 struct smb_version_values smb311_values = {
5127 .version_string = SMB311_VERSION_STRING,
5128 .protocol_id = SMB311_PROT_ID,
5129 .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,
5130 .large_lock_type = 0,
5131 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5132 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5133 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5134 .header_size = sizeof(struct smb2_sync_hdr),
5135 .header_preamble_size = 0,
5136 .max_header_size = MAX_SMB2_HDR_SIZE,
5137 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5138 .lock_cmd = SMB2_LOCK,
5140 .cap_nt_find = SMB2_NT_FIND,
5141 .cap_large_files = SMB2_LARGE_FILES,
5142 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5143 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5144 .create_lease_size = sizeof(struct create_lease_v2),