2 * SMB2 version specific operations
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include <linux/scatterlist.h>
24 #include <linux/uuid.h>
25 #include <crypto/aead.h>
28 #include "smb2proto.h"
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_unicode.h"
32 #include "smb2status.h"
34 #include "cifs_ioctl.h"
36 /* Change credits for different ops and return the total number of credits */
38 change_conf(struct TCP_Server_Info *server)
40 server->credits += server->echo_credits + server->oplock_credits;
41 server->oplock_credits = server->echo_credits = 0;
42 switch (server->credits) {
46 server->echoes = false;
47 server->oplocks = false;
50 server->echoes = true;
51 server->oplocks = false;
52 server->echo_credits = 1;
55 server->echoes = true;
57 server->oplocks = true;
58 server->oplock_credits = 1;
60 server->oplocks = false;
62 server->echo_credits = 1;
64 server->credits -= server->echo_credits + server->oplock_credits;
65 return server->credits + server->echo_credits + server->oplock_credits;
69 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
74 spin_lock(&server->req_lock);
75 val = server->ops->get_credits_field(server, optype);
78 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
79 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
82 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
83 rc = change_conf(server);
85 * Sometimes server returns 0 credits on oplock break ack - we need to
86 * rebalance credits in this case.
88 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
90 if (server->credits > 1) {
92 server->oplock_credits++;
95 spin_unlock(&server->req_lock);
96 wake_up(&server->request_q);
98 if (server->tcpStatus == CifsNeedReconnect)
103 /* change_conf hasn't been executed */
106 cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
109 cifs_dbg(VFS, "disabling echoes and oplocks\n");
112 cifs_dbg(FYI, "disabling oplocks\n");
115 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
120 smb2_set_credits(struct TCP_Server_Info *server, const int val)
122 spin_lock(&server->req_lock);
123 server->credits = val;
124 spin_unlock(&server->req_lock);
128 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
132 return &server->echo_credits;
134 return &server->oplock_credits;
136 return &server->credits;
141 smb2_get_credits(struct mid_q_entry *mid)
143 struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
145 return le16_to_cpu(shdr->CreditRequest);
149 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
150 unsigned int *num, unsigned int *credits)
153 unsigned int scredits;
155 spin_lock(&server->req_lock);
157 if (server->credits <= 0) {
158 spin_unlock(&server->req_lock);
159 cifs_num_waiters_inc(server);
160 rc = wait_event_killable(server->request_q,
161 has_credits(server, &server->credits));
162 cifs_num_waiters_dec(server);
165 spin_lock(&server->req_lock);
167 if (server->tcpStatus == CifsExiting) {
168 spin_unlock(&server->req_lock);
172 scredits = server->credits;
173 /* can deadlock with reopen */
175 *num = SMB2_MAX_BUFFER_SIZE;
180 /* leave some credits for reopen and other ops */
182 *num = min_t(unsigned int, size,
183 scredits * SMB2_MAX_BUFFER_SIZE);
185 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
186 server->credits -= *credits;
191 spin_unlock(&server->req_lock);
196 smb2_get_next_mid(struct TCP_Server_Info *server)
199 /* for SMB2 we need the current value */
200 spin_lock(&GlobalMid_Lock);
201 mid = server->CurrentMid++;
202 spin_unlock(&GlobalMid_Lock);
206 static struct mid_q_entry *
207 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
209 struct mid_q_entry *mid;
210 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
211 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
213 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
214 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
218 spin_lock(&GlobalMid_Lock);
219 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
220 if ((mid->mid == wire_mid) &&
221 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
222 (mid->command == shdr->Command)) {
223 kref_get(&mid->refcount);
224 spin_unlock(&GlobalMid_Lock);
228 spin_unlock(&GlobalMid_Lock);
233 smb2_dump_detail(void *buf)
235 #ifdef CONFIG_CIFS_DEBUG2
236 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
238 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
239 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
241 cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
246 smb2_need_neg(struct TCP_Server_Info *server)
248 return server->max_read == 0;
252 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
255 ses->server->CurrentMid = 0;
256 rc = SMB2_negotiate(xid, ses);
257 /* BB we probably don't need to retry with modern servers */
264 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
266 struct TCP_Server_Info *server = tcon->ses->server;
269 /* start with specified wsize, or default */
270 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
271 wsize = min_t(unsigned int, wsize, server->max_write);
273 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
274 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
280 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
282 struct TCP_Server_Info *server = tcon->ses->server;
285 /* start with specified rsize, or default */
286 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
287 rsize = min_t(unsigned int, rsize, server->max_read);
289 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
290 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
295 #ifdef CONFIG_CIFS_STATS2
297 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
300 unsigned int ret_data_len = 0;
301 struct network_interface_info_ioctl_rsp *out_buf;
303 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
304 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
306 NULL /* no data input */, 0 /* no data input */,
307 (char **)&out_buf, &ret_data_len);
309 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
310 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
311 cifs_dbg(VFS, "server returned bad net interface info buf\n");
314 /* Dump info on first interface */
315 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
316 le32_to_cpu(out_buf->Capability));
317 cifs_dbg(FYI, "Link Speed %lld\n",
318 le64_to_cpu(out_buf->LinkSpeed));
326 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
329 __le16 srch_path = 0; /* Null - open root of share */
330 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
331 struct cifs_open_parms oparms;
335 oparms.desired_access = FILE_READ_ATTRIBUTES;
336 oparms.disposition = FILE_OPEN;
337 oparms.create_options = 0;
339 oparms.reconnect = false;
341 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
345 #ifdef CONFIG_CIFS_STATS2
346 SMB3_request_interfaces(xid, tcon);
349 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
350 FS_ATTRIBUTE_INFORMATION);
351 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
352 FS_DEVICE_INFORMATION);
353 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
354 FS_VOLUME_INFORMATION);
355 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
356 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
357 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
362 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
365 __le16 srch_path = 0; /* Null - open root of share */
366 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
367 struct cifs_open_parms oparms;
371 oparms.desired_access = FILE_READ_ATTRIBUTES;
372 oparms.disposition = FILE_OPEN;
373 oparms.create_options = 0;
375 oparms.reconnect = false;
377 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
381 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
382 FS_ATTRIBUTE_INFORMATION);
383 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
384 FS_DEVICE_INFORMATION);
385 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
390 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
391 struct cifs_sb_info *cifs_sb, const char *full_path)
395 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
396 struct cifs_open_parms oparms;
399 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
404 oparms.desired_access = FILE_READ_ATTRIBUTES;
405 oparms.disposition = FILE_OPEN;
406 if (backup_cred(cifs_sb))
407 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
409 oparms.create_options = 0;
411 oparms.reconnect = false;
413 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
419 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
425 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
426 struct cifs_sb_info *cifs_sb, const char *full_path,
427 u64 *uniqueid, FILE_ALL_INFO *data)
429 *uniqueid = le64_to_cpu(data->IndexNumber);
434 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
435 struct cifs_fid *fid, FILE_ALL_INFO *data)
438 struct smb2_file_all_info *smb2_data;
440 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
442 if (smb2_data == NULL)
445 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
448 move_smb2_info_to_cifs(data, smb2_data);
453 #ifdef CONFIG_CIFS_XATTR
455 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
456 struct smb2_file_full_ea_info *src, size_t src_size,
457 const unsigned char *ea_name)
460 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
462 size_t buf_size = dst_size;
463 size_t name_len, value_len, user_name_len;
465 while (src_size > 0) {
466 name_len = (size_t)src->ea_name_length;
467 value_len = (size_t)le16_to_cpu(src->ea_value_length);
473 if (src_size < 8 + name_len + 1 + value_len) {
474 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
479 name = &src->ea_data[0];
480 value = &src->ea_data[src->ea_name_length + 1];
483 if (ea_name_len == name_len &&
484 memcmp(ea_name, name, name_len) == 0) {
488 if (dst_size < value_len) {
492 memcpy(dst, value, value_len);
496 /* 'user.' plus a terminating null */
497 user_name_len = 5 + 1 + name_len;
500 /* skip copy - calc size only */
502 } else if (dst_size >= user_name_len) {
503 dst_size -= user_name_len;
504 memcpy(dst, "user.", 5);
506 memcpy(dst, src->ea_data, name_len);
512 /* stop before overrun buffer */
518 if (!src->next_entry_offset)
521 if (src_size < le32_to_cpu(src->next_entry_offset)) {
522 /* stop before overrun buffer */
526 src_size -= le32_to_cpu(src->next_entry_offset);
527 src = (void *)((char *)src +
528 le32_to_cpu(src->next_entry_offset));
531 /* didn't find the named attribute */
540 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
541 const unsigned char *path, const unsigned char *ea_name,
542 char *ea_data, size_t buf_size,
543 struct cifs_sb_info *cifs_sb)
547 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
548 struct cifs_open_parms oparms;
550 struct smb2_file_full_ea_info *smb2_data;
551 int ea_buf_size = SMB2_MIN_EA_BUF;
553 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
558 oparms.desired_access = FILE_READ_EA;
559 oparms.disposition = FILE_OPEN;
560 if (backup_cred(cifs_sb))
561 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
563 oparms.create_options = 0;
565 oparms.reconnect = false;
567 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
570 cifs_dbg(FYI, "open failed rc=%d\n", rc);
575 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
576 if (smb2_data == NULL) {
577 SMB2_close(xid, tcon, fid.persistent_fid,
582 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
584 ea_buf_size, smb2_data);
592 if (ea_buf_size > SMB2_MAX_EA_BUF) {
593 cifs_dbg(VFS, "EA size is too large\n");
594 SMB2_close(xid, tcon, fid.persistent_fid,
600 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
603 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
604 * not an error. Otherwise, the specified ea_name was not found.
607 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
608 SMB2_MAX_EA_BUF, ea_name);
609 else if (!ea_name && rc == -ENODATA)
618 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
619 const char *path, const char *ea_name, const void *ea_value,
620 const __u16 ea_value_len, const struct nls_table *nls_codepage,
621 struct cifs_sb_info *cifs_sb)
625 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
626 struct cifs_open_parms oparms;
628 struct smb2_file_full_ea_info *ea;
629 int ea_name_len = strlen(ea_name);
632 if (ea_name_len > 255)
635 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
640 oparms.desired_access = FILE_WRITE_EA;
641 oparms.disposition = FILE_OPEN;
642 if (backup_cred(cifs_sb))
643 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
645 oparms.create_options = 0;
647 oparms.reconnect = false;
649 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
652 cifs_dbg(FYI, "open failed rc=%d\n", rc);
656 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
657 ea = kzalloc(len, GFP_KERNEL);
659 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
663 ea->ea_name_length = ea_name_len;
664 ea->ea_value_length = cpu_to_le16(ea_value_len);
665 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
666 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
668 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
672 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
679 smb2_can_echo(struct TCP_Server_Info *server)
681 return server->echoes;
685 smb2_clear_stats(struct cifs_tcon *tcon)
687 #ifdef CONFIG_CIFS_STATS
689 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
690 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
691 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
697 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
699 seq_puts(m, "\n\tShare Capabilities:");
700 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
701 seq_puts(m, " DFS,");
702 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
703 seq_puts(m, " CONTINUOUS AVAILABILITY,");
704 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
705 seq_puts(m, " SCALEOUT,");
706 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
707 seq_puts(m, " CLUSTER,");
708 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
709 seq_puts(m, " ASYMMETRIC,");
710 if (tcon->capabilities == 0)
711 seq_puts(m, " None");
712 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
713 seq_puts(m, " Aligned,");
714 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
715 seq_puts(m, " Partition Aligned,");
716 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
717 seq_puts(m, " SSD,");
718 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
719 seq_puts(m, " TRIM-support,");
721 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
722 if (tcon->perf_sector_size)
723 seq_printf(m, "\tOptimal sector size: 0x%x",
724 tcon->perf_sector_size);
728 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
730 #ifdef CONFIG_CIFS_STATS
731 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
732 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
733 seq_printf(m, "\nNegotiates: %d sent %d failed",
734 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
735 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
736 seq_printf(m, "\nSessionSetups: %d sent %d failed",
737 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
738 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
739 seq_printf(m, "\nLogoffs: %d sent %d failed",
740 atomic_read(&sent[SMB2_LOGOFF_HE]),
741 atomic_read(&failed[SMB2_LOGOFF_HE]));
742 seq_printf(m, "\nTreeConnects: %d sent %d failed",
743 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
744 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
745 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
746 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
747 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
748 seq_printf(m, "\nCreates: %d sent %d failed",
749 atomic_read(&sent[SMB2_CREATE_HE]),
750 atomic_read(&failed[SMB2_CREATE_HE]));
751 seq_printf(m, "\nCloses: %d sent %d failed",
752 atomic_read(&sent[SMB2_CLOSE_HE]),
753 atomic_read(&failed[SMB2_CLOSE_HE]));
754 seq_printf(m, "\nFlushes: %d sent %d failed",
755 atomic_read(&sent[SMB2_FLUSH_HE]),
756 atomic_read(&failed[SMB2_FLUSH_HE]));
757 seq_printf(m, "\nReads: %d sent %d failed",
758 atomic_read(&sent[SMB2_READ_HE]),
759 atomic_read(&failed[SMB2_READ_HE]));
760 seq_printf(m, "\nWrites: %d sent %d failed",
761 atomic_read(&sent[SMB2_WRITE_HE]),
762 atomic_read(&failed[SMB2_WRITE_HE]));
763 seq_printf(m, "\nLocks: %d sent %d failed",
764 atomic_read(&sent[SMB2_LOCK_HE]),
765 atomic_read(&failed[SMB2_LOCK_HE]));
766 seq_printf(m, "\nIOCTLs: %d sent %d failed",
767 atomic_read(&sent[SMB2_IOCTL_HE]),
768 atomic_read(&failed[SMB2_IOCTL_HE]));
769 seq_printf(m, "\nCancels: %d sent %d failed",
770 atomic_read(&sent[SMB2_CANCEL_HE]),
771 atomic_read(&failed[SMB2_CANCEL_HE]));
772 seq_printf(m, "\nEchos: %d sent %d failed",
773 atomic_read(&sent[SMB2_ECHO_HE]),
774 atomic_read(&failed[SMB2_ECHO_HE]));
775 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
776 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
777 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
778 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
779 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
780 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
781 seq_printf(m, "\nQueryInfos: %d sent %d failed",
782 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
783 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
784 seq_printf(m, "\nSetInfos: %d sent %d failed",
785 atomic_read(&sent[SMB2_SET_INFO_HE]),
786 atomic_read(&failed[SMB2_SET_INFO_HE]));
787 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
788 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
789 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
794 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
796 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
797 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
799 cfile->fid.persistent_fid = fid->persistent_fid;
800 cfile->fid.volatile_fid = fid->volatile_fid;
801 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
803 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
804 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
808 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
809 struct cifs_fid *fid)
811 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
815 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
816 u64 persistent_fid, u64 volatile_fid,
817 struct copychunk_ioctl *pcchunk)
820 unsigned int ret_data_len;
821 struct resume_key_req *res_key;
823 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
824 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
826 NULL, 0 /* no input */,
827 (char **)&res_key, &ret_data_len);
830 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
831 goto req_res_key_exit;
833 if (ret_data_len < sizeof(struct resume_key_req)) {
834 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
836 goto req_res_key_exit;
838 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
846 smb2_copychunk_range(const unsigned int xid,
847 struct cifsFileInfo *srcfile,
848 struct cifsFileInfo *trgtfile, u64 src_off,
849 u64 len, u64 dest_off)
852 unsigned int ret_data_len;
853 struct copychunk_ioctl *pcchunk;
854 struct copychunk_ioctl_rsp *retbuf = NULL;
855 struct cifs_tcon *tcon;
856 int chunks_copied = 0;
857 bool chunk_sizes_updated = false;
858 ssize_t bytes_written, total_bytes_written = 0;
861 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
864 * We need to flush all unwritten data before we can send the
865 * copychunk ioctl to the server.
867 inode = d_inode(trgtfile->dentry);
868 filemap_write_and_wait(inode->i_mapping);
873 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
874 /* Request a key from the server to identify the source of the copy */
875 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
876 srcfile->fid.persistent_fid,
877 srcfile->fid.volatile_fid, pcchunk);
879 /* Note: request_res_key sets res_key null only if rc !=0 */
883 /* For now array only one chunk long, will make more flexible later */
884 pcchunk->ChunkCount = cpu_to_le32(1);
885 pcchunk->Reserved = 0;
886 pcchunk->Reserved2 = 0;
888 tcon = tlink_tcon(trgtfile->tlink);
891 pcchunk->SourceOffset = cpu_to_le64(src_off);
892 pcchunk->TargetOffset = cpu_to_le64(dest_off);
894 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
896 /* Request server copy to target from src identified by key */
899 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
900 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
901 true /* is_fsctl */, false /* use_ipc */,
903 sizeof(struct copychunk_ioctl), (char **)&retbuf,
907 sizeof(struct copychunk_ioctl_rsp)) {
908 cifs_dbg(VFS, "invalid cchunk response size\n");
912 if (retbuf->TotalBytesWritten == 0) {
913 cifs_dbg(FYI, "no bytes copied\n");
918 * Check if server claimed to write more than we asked
920 if (le32_to_cpu(retbuf->TotalBytesWritten) >
921 le32_to_cpu(pcchunk->Length)) {
922 cifs_dbg(VFS, "invalid copy chunk response\n");
926 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
927 cifs_dbg(VFS, "invalid num chunks written\n");
933 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
934 src_off += bytes_written;
935 dest_off += bytes_written;
936 len -= bytes_written;
937 total_bytes_written += bytes_written;
939 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
940 le32_to_cpu(retbuf->ChunksWritten),
941 le32_to_cpu(retbuf->ChunkBytesWritten),
943 } else if (rc == -EINVAL) {
944 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
947 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
948 le32_to_cpu(retbuf->ChunksWritten),
949 le32_to_cpu(retbuf->ChunkBytesWritten),
950 le32_to_cpu(retbuf->TotalBytesWritten));
953 * Check if this is the first request using these sizes,
954 * (ie check if copy succeed once with original sizes
955 * and check if the server gave us different sizes after
956 * we already updated max sizes on previous request).
957 * if not then why is the server returning an error now
959 if ((chunks_copied != 0) || chunk_sizes_updated)
962 /* Check that server is not asking us to grow size */
963 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
964 tcon->max_bytes_chunk)
965 tcon->max_bytes_chunk =
966 le32_to_cpu(retbuf->ChunkBytesWritten);
968 goto cchunk_out; /* server gave us bogus size */
970 /* No need to change MaxChunks since already set to 1 */
971 chunk_sizes_updated = true;
982 return total_bytes_written;
986 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
987 struct cifs_fid *fid)
989 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
993 smb2_read_data_offset(char *buf)
995 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
996 return rsp->DataOffset;
1000 smb2_read_data_length(char *buf)
1002 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1003 return le32_to_cpu(rsp->DataLength);
1008 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1009 struct cifs_io_parms *parms, unsigned int *bytes_read,
1010 char **buf, int *buf_type)
1012 parms->persistent_fid = pfid->persistent_fid;
1013 parms->volatile_fid = pfid->volatile_fid;
1014 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1018 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1019 struct cifs_io_parms *parms, unsigned int *written,
1020 struct kvec *iov, unsigned long nr_segs)
1023 parms->persistent_fid = pfid->persistent_fid;
1024 parms->volatile_fid = pfid->volatile_fid;
1025 return SMB2_write(xid, parms, written, iov, nr_segs);
1028 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1029 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1030 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1032 struct cifsInodeInfo *cifsi;
1035 cifsi = CIFS_I(inode);
1037 /* if file already sparse don't bother setting sparse again */
1038 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1039 return true; /* already sparse */
1041 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1042 return true; /* already not sparse */
1045 * Can't check for sparse support on share the usual way via the
1046 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1047 * since Samba server doesn't set the flag on the share, yet
1048 * supports the set sparse FSCTL and returns sparse correctly
1049 * in the file attributes. If we fail setting sparse though we
1050 * mark that server does not support sparse files for this share
1051 * to avoid repeatedly sending the unsupported fsctl to server
1052 * if the file is repeatedly extended.
1054 if (tcon->broken_sparse_sup)
1057 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1058 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1059 true /* is_fctl */, false /* use_ipc */,
1060 &setsparse, 1, NULL, NULL);
1062 tcon->broken_sparse_sup = true;
1063 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1068 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1070 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1076 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1077 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1079 __le64 eof = cpu_to_le64(size);
1080 struct inode *inode;
1083 * If extending file more than one page make sparse. Many Linux fs
1084 * make files sparse by default when extending via ftruncate
1086 inode = d_inode(cfile->dentry);
1088 if (!set_alloc && (size > inode->i_size + 8192)) {
1089 __u8 set_sparse = 1;
1091 /* whether set sparse succeeds or not, extend the file */
1092 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1095 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1096 cfile->fid.volatile_fid, cfile->pid, &eof, false);
1100 smb2_duplicate_extents(const unsigned int xid,
1101 struct cifsFileInfo *srcfile,
1102 struct cifsFileInfo *trgtfile, u64 src_off,
1103 u64 len, u64 dest_off)
1106 unsigned int ret_data_len;
1107 struct duplicate_extents_to_file dup_ext_buf;
1108 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1110 /* server fileays advertise duplicate extent support with this flag */
1111 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1112 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1115 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1116 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1117 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1118 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1119 dup_ext_buf.ByteCount = cpu_to_le64(len);
1120 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1121 src_off, dest_off, len);
1123 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1125 goto duplicate_extents_out;
1127 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1128 trgtfile->fid.volatile_fid,
1129 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1130 true /* is_fsctl */, false /* use_ipc */,
1131 (char *)&dup_ext_buf,
1132 sizeof(struct duplicate_extents_to_file),
1136 if (ret_data_len > 0)
1137 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1139 duplicate_extents_out:
1144 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1145 struct cifsFileInfo *cfile)
1147 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1148 cfile->fid.volatile_fid);
1152 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1153 struct cifsFileInfo *cfile)
1155 struct fsctl_set_integrity_information_req integr_info;
1156 unsigned int ret_data_len;
1158 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1159 integr_info.Flags = 0;
1160 integr_info.Reserved = 0;
1162 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1163 cfile->fid.volatile_fid,
1164 FSCTL_SET_INTEGRITY_INFORMATION,
1165 true /* is_fsctl */, false /* use_ipc */,
1166 (char *)&integr_info,
1167 sizeof(struct fsctl_set_integrity_information_req),
1173 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1174 #define GMT_TOKEN_SIZE 50
1177 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1178 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1181 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1182 struct cifsFileInfo *cfile, void __user *ioc_buf)
1184 char *retbuf = NULL;
1185 unsigned int ret_data_len = 0;
1187 struct smb_snapshot_array snapshot_in;
1189 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1190 cfile->fid.volatile_fid,
1191 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1192 true /* is_fsctl */, false /* use_ipc */,
1193 NULL, 0 /* no input data */,
1196 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1201 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1203 if (copy_from_user(&snapshot_in, ioc_buf,
1204 sizeof(struct smb_snapshot_array))) {
1211 * Check for min size, ie not large enough to fit even one GMT
1212 * token (snapshot). On the first ioctl some users may pass in
1213 * smaller size (or zero) to simply get the size of the array
1214 * so the user space caller can allocate sufficient memory
1215 * and retry the ioctl again with larger array size sufficient
1216 * to hold all of the snapshot GMT tokens on the second try.
1218 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1219 ret_data_len = sizeof(struct smb_snapshot_array);
1222 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1223 * the snapshot array (of 50 byte GMT tokens) each
1224 * representing an available previous version of the data
1226 if (ret_data_len > (snapshot_in.snapshot_array_size +
1227 sizeof(struct smb_snapshot_array)))
1228 ret_data_len = snapshot_in.snapshot_array_size +
1229 sizeof(struct smb_snapshot_array);
1231 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1240 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1241 const char *path, struct cifs_sb_info *cifs_sb,
1242 struct cifs_fid *fid, __u16 search_flags,
1243 struct cifs_search_info *srch_inf)
1247 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1248 struct cifs_open_parms oparms;
1250 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1255 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1256 oparms.disposition = FILE_OPEN;
1257 if (backup_cred(cifs_sb))
1258 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1260 oparms.create_options = 0;
1262 oparms.reconnect = false;
1264 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1267 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1271 srch_inf->entries_in_buffer = 0;
1272 srch_inf->index_of_last_entry = 2;
1274 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1275 fid->volatile_fid, 0, srch_inf);
1277 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1278 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1284 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1285 struct cifs_fid *fid, __u16 search_flags,
1286 struct cifs_search_info *srch_inf)
1288 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1289 fid->volatile_fid, 0, srch_inf);
1293 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1294 struct cifs_fid *fid)
1296 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1300 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1301 * the number of credits and return true. Otherwise - return false.
1304 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1306 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1308 if (shdr->Status != STATUS_PENDING)
1312 spin_lock(&server->req_lock);
1313 server->credits += le16_to_cpu(shdr->CreditRequest);
1314 spin_unlock(&server->req_lock);
1315 wake_up(&server->request_q);
1322 smb2_is_session_expired(char *buf)
1324 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1326 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1327 shdr->Status != STATUS_USER_SESSION_DELETED)
1330 cifs_dbg(FYI, "Session expired or deleted\n");
1335 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1336 struct cifsInodeInfo *cinode)
1338 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1339 return SMB2_lease_break(0, tcon, cinode->lease_key,
1340 smb2_get_lease_state(cinode));
1342 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1344 CIFS_CACHE_READ(cinode) ? 1 : 0);
1348 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1349 struct kstatfs *buf)
1352 __le16 srch_path = 0; /* Null - open root of share */
1353 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1354 struct cifs_open_parms oparms;
1355 struct cifs_fid fid;
1358 oparms.desired_access = FILE_READ_ATTRIBUTES;
1359 oparms.disposition = FILE_OPEN;
1360 oparms.create_options = 0;
1362 oparms.reconnect = false;
1364 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1367 buf->f_type = SMB2_MAGIC_NUMBER;
1368 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1370 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1375 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1377 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1378 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1382 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1383 __u64 length, __u32 type, int lock, int unlock, bool wait)
1385 if (unlock && !lock)
1386 type = SMB2_LOCKFLAG_UNLOCK;
1387 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1388 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1389 current->tgid, length, offset, type, wait);
1393 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1395 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1399 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1401 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1405 smb2_new_lease_key(struct cifs_fid *fid)
1407 generate_random_uuid(fid->lease_key);
1411 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1412 const char *search_name,
1413 struct dfs_info3_param **target_nodes,
1414 unsigned int *num_of_nodes,
1415 const struct nls_table *nls_codepage, int remap)
1418 __le16 *utf16_path = NULL;
1419 int utf16_path_len = 0;
1420 struct cifs_tcon *tcon;
1421 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1422 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1423 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1425 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1428 * Use any tcon from the current session. Here, the first one.
1430 spin_lock(&cifs_tcp_ses_lock);
1431 tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
1435 spin_unlock(&cifs_tcp_ses_lock);
1438 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1444 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1446 nls_codepage, remap);
1452 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1453 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1459 /* Highest DFS referral version understood */
1460 dfs_req->MaxReferralLevel = DFS_VERSION;
1462 /* Path to resolve in an UTF-16 null-terminated string */
1463 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1466 /* try first with IPC */
1467 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1468 FSCTL_DFS_GET_REFERRALS,
1469 true /* is_fsctl */, true /* use_ipc */,
1470 (char *)dfs_req, dfs_req_size,
1471 (char **)&dfs_rsp, &dfs_rsp_size);
1472 if (rc == -ENOTCONN) {
1473 /* try with normal tcon */
1474 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1475 FSCTL_DFS_GET_REFERRALS,
1476 true /* is_fsctl */, false /*use_ipc*/,
1477 (char *)dfs_req, dfs_req_size,
1478 (char **)&dfs_rsp, &dfs_rsp_size);
1480 } while (rc == -EAGAIN);
1483 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1487 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1488 num_of_nodes, target_nodes,
1489 nls_codepage, remap, search_name,
1490 true /* is_unicode */);
1492 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1498 spin_lock(&cifs_tcp_ses_lock);
1500 spin_unlock(&cifs_tcp_ses_lock);
1507 #define SMB2_SYMLINK_STRUCT_SIZE \
1508 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1511 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1512 const char *full_path, char **target_path,
1513 struct cifs_sb_info *cifs_sb)
1517 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1518 struct cifs_open_parms oparms;
1519 struct cifs_fid fid;
1520 struct smb2_err_rsp *err_buf = NULL;
1521 struct smb2_symlink_err_rsp *symlink;
1522 unsigned int sub_len;
1523 unsigned int sub_offset;
1524 unsigned int print_len;
1525 unsigned int print_offset;
1527 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1529 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1534 oparms.desired_access = FILE_READ_ATTRIBUTES;
1535 oparms.disposition = FILE_OPEN;
1536 if (backup_cred(cifs_sb))
1537 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1539 oparms.create_options = 0;
1541 oparms.reconnect = false;
1543 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1545 if (!rc || !err_buf) {
1550 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1551 get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1556 /* open must fail on symlink - reset rc */
1558 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1559 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1560 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1561 print_len = le16_to_cpu(symlink->PrintNameLength);
1562 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1564 if (get_rfc1002_length(err_buf) + 4 <
1565 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1570 if (get_rfc1002_length(err_buf) + 4 <
1571 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1576 *target_path = cifs_strndup_from_utf16(
1577 (char *)symlink->PathBuffer + sub_offset,
1578 sub_len, true, cifs_sb->local_nls);
1579 if (!(*target_path)) {
1583 convert_delimiter(*target_path, '/');
1584 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1589 #ifdef CONFIG_CIFS_ACL
1590 static struct cifs_ntsd *
1591 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1592 const struct cifs_fid *cifsfid, u32 *pacllen)
1594 struct cifs_ntsd *pntsd = NULL;
1596 int rc = -EOPNOTSUPP;
1597 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1600 return ERR_CAST(tlink);
1603 cifs_dbg(FYI, "trying to get acl\n");
1605 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1606 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1609 cifs_put_tlink(tlink);
1611 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1618 static struct cifs_ntsd *
1619 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1620 const char *path, u32 *pacllen)
1622 struct cifs_ntsd *pntsd = NULL;
1623 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1626 struct cifs_tcon *tcon;
1627 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1628 struct cifs_fid fid;
1629 struct cifs_open_parms oparms;
1632 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1634 return ERR_CAST(tlink);
1636 tcon = tlink_tcon(tlink);
1639 if (backup_cred(cifs_sb))
1640 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1642 oparms.create_options = 0;
1644 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1652 oparms.desired_access = READ_CONTROL;
1653 oparms.disposition = FILE_OPEN;
1655 oparms.reconnect = false;
1657 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1660 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1661 fid.volatile_fid, (void **)&pntsd, pacllen);
1662 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1665 cifs_put_tlink(tlink);
1668 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1674 #ifdef CONFIG_CIFS_ACL
1676 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1677 struct inode *inode, const char *path, int aclflag)
1679 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1681 int rc, access_flags = 0;
1682 struct cifs_tcon *tcon;
1683 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1684 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1685 struct cifs_fid fid;
1686 struct cifs_open_parms oparms;
1689 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1691 return PTR_ERR(tlink);
1693 tcon = tlink_tcon(tlink);
1696 if (backup_cred(cifs_sb))
1697 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1699 oparms.create_options = 0;
1701 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1702 access_flags = WRITE_OWNER;
1704 access_flags = WRITE_DAC;
1706 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1714 oparms.desired_access = access_flags;
1715 oparms.disposition = FILE_OPEN;
1718 oparms.reconnect = false;
1720 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1723 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1724 fid.volatile_fid, pnntsd, acllen, aclflag);
1725 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1728 cifs_put_tlink(tlink);
1732 #endif /* CIFS_ACL */
1734 /* Retrieve an ACL from the server */
1735 static struct cifs_ntsd *
1736 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1737 struct inode *inode, const char *path,
1740 struct cifs_ntsd *pntsd = NULL;
1741 struct cifsFileInfo *open_file = NULL;
1744 open_file = find_readable_file(CIFS_I(inode), true);
1746 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1748 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1749 cifsFileInfo_put(open_file);
1754 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1755 loff_t offset, loff_t len, bool keep_size)
1757 struct inode *inode;
1758 struct cifsInodeInfo *cifsi;
1759 struct cifsFileInfo *cfile = file->private_data;
1760 struct file_zero_data_information fsctl_buf;
1766 inode = d_inode(cfile->dentry);
1767 cifsi = CIFS_I(inode);
1770 * We zero the range through ioctl, so we need remove the page caches
1771 * first, otherwise the data may be inconsistent with the server.
1773 truncate_pagecache_range(inode, offset, offset + len - 1);
1775 /* if file not oplocked can't be sure whether asking to extend size */
1776 if (!CIFS_CACHE_READ(cifsi))
1777 if (keep_size == false) {
1784 * Must check if file sparse since fallocate -z (zero range) assumes
1785 * non-sparse allocation
1787 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1794 * need to make sure we are not asked to extend the file since the SMB3
1795 * fsctl does not change the file size. In the future we could change
1796 * this to zero the first part of the range then set the file size
1797 * which for a non sparse file would zero the newly extended range
1799 if (keep_size == false)
1800 if (i_size_read(inode) < offset + len) {
1806 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1808 fsctl_buf.FileOffset = cpu_to_le64(offset);
1809 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1811 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1812 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1813 true /* is_fctl */, false /* use_ipc */,
1815 sizeof(struct file_zero_data_information), NULL, NULL);
1820 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1821 loff_t offset, loff_t len)
1823 struct inode *inode;
1824 struct cifsInodeInfo *cifsi;
1825 struct cifsFileInfo *cfile = file->private_data;
1826 struct file_zero_data_information fsctl_buf;
1829 __u8 set_sparse = 1;
1833 inode = d_inode(cfile->dentry);
1834 cifsi = CIFS_I(inode);
1836 /* Need to make file sparse, if not already, before freeing range. */
1837 /* Consider adding equivalent for compressed since it could also work */
1838 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
1845 * We implement the punch hole through ioctl, so we need remove the page
1846 * caches first, otherwise the data may be inconsistent with the server.
1848 truncate_pagecache_range(inode, offset, offset + len - 1);
1850 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1852 fsctl_buf.FileOffset = cpu_to_le64(offset);
1853 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1855 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1856 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1857 true /* is_fctl */, false /* use_ipc */,
1859 sizeof(struct file_zero_data_information), NULL, NULL);
1864 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1865 loff_t off, loff_t len, bool keep_size)
1867 struct inode *inode;
1868 struct cifsInodeInfo *cifsi;
1869 struct cifsFileInfo *cfile = file->private_data;
1870 long rc = -EOPNOTSUPP;
1875 inode = d_inode(cfile->dentry);
1876 cifsi = CIFS_I(inode);
1878 /* if file not oplocked can't be sure whether asking to extend size */
1879 if (!CIFS_CACHE_READ(cifsi))
1880 if (keep_size == false) {
1886 * Files are non-sparse by default so falloc may be a no-op
1887 * Must check if file sparse. If not sparse, and not extending
1888 * then no need to do anything since file already allocated
1890 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1891 if (keep_size == true)
1893 /* check if extending file */
1894 else if (i_size_read(inode) >= off + len)
1895 /* not extending file and already not sparse */
1897 /* BB: in future add else clause to extend file */
1904 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1906 * Check if falloc starts within first few pages of file
1907 * and ends within a few pages of the end of file to
1908 * ensure that most of file is being forced to be
1909 * fallocated now. If so then setting whole file sparse
1910 * ie potentially making a few extra pages at the beginning
1911 * or end of the file non-sparse via set_sparse is harmless.
1913 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
1919 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1921 /* BB: else ... in future add code to extend file and set sparse */
1929 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1930 loff_t off, loff_t len)
1932 /* KEEP_SIZE already checked for by do_fallocate */
1933 if (mode & FALLOC_FL_PUNCH_HOLE)
1934 return smb3_punch_hole(file, tcon, off, len);
1935 else if (mode & FALLOC_FL_ZERO_RANGE) {
1936 if (mode & FALLOC_FL_KEEP_SIZE)
1937 return smb3_zero_range(file, tcon, off, len, true);
1938 return smb3_zero_range(file, tcon, off, len, false);
1939 } else if (mode == FALLOC_FL_KEEP_SIZE)
1940 return smb3_simple_falloc(file, tcon, off, len, true);
1942 return smb3_simple_falloc(file, tcon, off, len, false);
1948 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1949 struct cifsInodeInfo *cinode, __u32 oplock,
1950 unsigned int epoch, bool *purge_cache)
1952 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
1956 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1957 unsigned int epoch, bool *purge_cache);
1960 smb3_downgrade_oplock(struct TCP_Server_Info *server,
1961 struct cifsInodeInfo *cinode, __u32 oplock,
1962 unsigned int epoch, bool *purge_cache)
1964 unsigned int old_state = cinode->oplock;
1965 unsigned int old_epoch = cinode->epoch;
1966 unsigned int new_state;
1968 if (epoch > old_epoch) {
1969 smb21_set_oplock_level(cinode, oplock, 0, NULL);
1970 cinode->epoch = epoch;
1973 new_state = cinode->oplock;
1974 *purge_cache = false;
1976 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
1977 (new_state & CIFS_CACHE_READ_FLG) == 0)
1978 *purge_cache = true;
1979 else if (old_state == new_state && (epoch - old_epoch > 1))
1980 *purge_cache = true;
1984 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1985 unsigned int epoch, bool *purge_cache)
1988 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1990 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1991 cinode->oplock = CIFS_CACHE_RHW_FLG;
1992 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1993 &cinode->vfs_inode);
1994 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1995 cinode->oplock = CIFS_CACHE_RW_FLG;
1996 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1997 &cinode->vfs_inode);
1998 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1999 cinode->oplock = CIFS_CACHE_READ_FLG;
2000 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2001 &cinode->vfs_inode);
2007 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2008 unsigned int epoch, bool *purge_cache)
2010 char message[5] = {0};
2011 unsigned int new_oplock = 0;
2014 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2017 /* Check if the server granted an oplock rather than a lease */
2018 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2019 return smb2_set_oplock_level(cinode, oplock, epoch,
2022 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2023 new_oplock |= CIFS_CACHE_READ_FLG;
2024 strcat(message, "R");
2026 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2027 new_oplock |= CIFS_CACHE_HANDLE_FLG;
2028 strcat(message, "H");
2030 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2031 new_oplock |= CIFS_CACHE_WRITE_FLG;
2032 strcat(message, "W");
2035 strncpy(message, "None", sizeof(message));
2037 cinode->oplock = new_oplock;
2038 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2039 &cinode->vfs_inode);
2043 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2044 unsigned int epoch, bool *purge_cache)
2046 unsigned int old_oplock = cinode->oplock;
2048 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2051 *purge_cache = false;
2052 if (old_oplock == CIFS_CACHE_READ_FLG) {
2053 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2054 (epoch - cinode->epoch > 0))
2055 *purge_cache = true;
2056 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2057 (epoch - cinode->epoch > 1))
2058 *purge_cache = true;
2059 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2060 (epoch - cinode->epoch > 1))
2061 *purge_cache = true;
2062 else if (cinode->oplock == 0 &&
2063 (epoch - cinode->epoch > 0))
2064 *purge_cache = true;
2065 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2066 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2067 (epoch - cinode->epoch > 0))
2068 *purge_cache = true;
2069 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2070 (epoch - cinode->epoch > 1))
2071 *purge_cache = true;
2073 cinode->epoch = epoch;
2078 smb2_is_read_op(__u32 oplock)
2080 return oplock == SMB2_OPLOCK_LEVEL_II;
2084 smb21_is_read_op(__u32 oplock)
2086 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2087 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2091 map_oplock_to_lease(u8 oplock)
2093 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2094 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2095 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2096 return SMB2_LEASE_READ_CACHING;
2097 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2098 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2099 SMB2_LEASE_WRITE_CACHING;
2104 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2106 struct create_lease *buf;
2108 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2112 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2113 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2114 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2116 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2117 (struct create_lease, lcontext));
2118 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2119 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2120 (struct create_lease, Name));
2121 buf->ccontext.NameLength = cpu_to_le16(4);
2122 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2131 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2133 struct create_lease_v2 *buf;
2135 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2139 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2140 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2141 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2143 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2144 (struct create_lease_v2, lcontext));
2145 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2146 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2147 (struct create_lease_v2, Name));
2148 buf->ccontext.NameLength = cpu_to_le16(4);
2149 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2158 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
2160 struct create_lease *lc = (struct create_lease *)buf;
2162 *epoch = 0; /* not used */
2163 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2164 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2165 return le32_to_cpu(lc->lcontext.LeaseState);
2169 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2171 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2173 *epoch = le16_to_cpu(lc->lcontext.Epoch);
2174 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2175 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2176 return le32_to_cpu(lc->lcontext.LeaseState);
2180 smb2_wp_retry_size(struct inode *inode)
2182 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2183 SMB2_MAX_BUFFER_SIZE);
2187 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2189 return !cfile->invalidHandle;
2193 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2195 struct smb2_sync_hdr *shdr =
2196 (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2197 unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2199 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2200 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2201 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2202 tr_hdr->Flags = cpu_to_le16(0x01);
2203 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2204 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2205 inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
2206 inc_rfc1001_len(tr_hdr, orig_len);
2209 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2210 * stack object as buf.
2212 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2213 unsigned int buflen)
2217 * VMAP_STACK (at least) puts stack into the vmalloc address space
2219 if (is_vmalloc_addr(buf))
2220 addr = vmalloc_to_page(buf);
2222 addr = virt_to_page(buf);
2223 sg_set_page(sg, addr, buflen, offset_in_page(buf));
2226 static struct scatterlist *
2227 init_sg(struct smb_rqst *rqst, u8 *sign)
2229 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2230 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2231 struct scatterlist *sg;
2235 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2239 sg_init_table(sg, sg_len);
2240 smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2241 for (i = 1; i < rqst->rq_nvec; i++)
2242 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2243 rqst->rq_iov[i].iov_len);
2244 for (j = 0; i < sg_len - 1; i++, j++) {
2245 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2247 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2249 smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2253 struct cifs_crypt_result {
2255 struct completion completion;
2258 static void cifs_crypt_complete(struct crypto_async_request *req, int err)
2260 struct cifs_crypt_result *res = req->data;
2262 if (err == -EINPROGRESS)
2266 complete(&res->completion);
2270 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2272 struct cifs_ses *ses;
2275 spin_lock(&cifs_tcp_ses_lock);
2276 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2277 if (ses->Suid != ses_id)
2279 ses_enc_key = enc ? ses->smb3encryptionkey :
2280 ses->smb3decryptionkey;
2281 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2282 spin_unlock(&cifs_tcp_ses_lock);
2285 spin_unlock(&cifs_tcp_ses_lock);
2290 * Encrypt or decrypt @rqst message. @rqst has the following format:
2291 * iov[0] - transform header (associate data),
2292 * iov[1-N] and pages - data to encrypt.
2293 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2297 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2299 struct smb2_transform_hdr *tr_hdr =
2300 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2301 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2303 struct scatterlist *sg;
2304 u8 sign[SMB2_SIGNATURE_SIZE] = {};
2305 u8 key[SMB3_SIGN_KEY_SIZE];
2306 struct aead_request *req;
2308 unsigned int iv_len;
2309 struct cifs_crypt_result result = {0, };
2310 struct crypto_aead *tfm;
2311 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2313 init_completion(&result.completion);
2315 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2317 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2322 rc = smb3_crypto_aead_allocate(server);
2324 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2328 tfm = enc ? server->secmech.ccmaesencrypt :
2329 server->secmech.ccmaesdecrypt;
2330 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2332 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2336 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2338 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2342 req = aead_request_alloc(tfm, GFP_KERNEL);
2344 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2349 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2350 crypt_len += SMB2_SIGNATURE_SIZE;
2353 sg = init_sg(rqst, sign);
2355 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2360 iv_len = crypto_aead_ivsize(tfm);
2361 iv = kzalloc(iv_len, GFP_KERNEL);
2363 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2368 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2370 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2371 aead_request_set_ad(req, assoc_data_len);
2373 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2374 cifs_crypt_complete, &result);
2376 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
2378 if (rc == -EINPROGRESS || rc == -EBUSY) {
2379 wait_for_completion(&result.completion);
2384 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2395 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2396 struct smb_rqst *old_rq)
2399 struct page **pages;
2400 struct smb2_transform_hdr *tr_hdr;
2401 unsigned int npages = old_rq->rq_npages;
2405 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2409 new_rq->rq_pages = pages;
2410 new_rq->rq_npages = old_rq->rq_npages;
2411 new_rq->rq_pagesz = old_rq->rq_pagesz;
2412 new_rq->rq_tailsz = old_rq->rq_tailsz;
2414 for (i = 0; i < npages; i++) {
2415 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2417 goto err_free_pages;
2420 iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2422 goto err_free_pages;
2424 /* copy all iovs from the old except the 1st one (rfc1002 length) */
2425 memcpy(&iov[1], &old_rq->rq_iov[1],
2426 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2427 new_rq->rq_iov = iov;
2428 new_rq->rq_nvec = old_rq->rq_nvec;
2430 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2434 /* fill the 1st iov with a transform header */
2435 fill_transform_hdr(tr_hdr, old_rq);
2436 new_rq->rq_iov[0].iov_base = tr_hdr;
2437 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2439 /* copy pages form the old */
2440 for (i = 0; i < npages; i++) {
2441 char *dst = kmap(new_rq->rq_pages[i]);
2442 char *src = kmap(old_rq->rq_pages[i]);
2443 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2445 memcpy(dst, src, len);
2446 kunmap(new_rq->rq_pages[i]);
2447 kunmap(old_rq->rq_pages[i]);
2450 rc = crypt_message(server, new_rq, 1);
2451 cifs_dbg(FYI, "encrypt message returned %d", rc);
2453 goto err_free_tr_hdr;
2462 for (i = i - 1; i >= 0; i--)
2469 smb3_free_transform_rq(struct smb_rqst *rqst)
2471 int i = rqst->rq_npages - 1;
2474 put_page(rqst->rq_pages[i]);
2475 kfree(rqst->rq_pages);
2476 /* free transform header */
2477 kfree(rqst->rq_iov[0].iov_base);
2478 kfree(rqst->rq_iov);
2482 smb3_is_transform_hdr(void *buf)
2484 struct smb2_transform_hdr *trhdr = buf;
2486 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2490 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2491 unsigned int buf_data_size, struct page **pages,
2492 unsigned int npages, unsigned int page_data_size)
2495 struct smb_rqst rqst = {NULL};
2496 struct smb2_hdr *hdr;
2499 iov[0].iov_base = buf;
2500 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2501 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2502 iov[1].iov_len = buf_data_size;
2506 rqst.rq_pages = pages;
2507 rqst.rq_npages = npages;
2508 rqst.rq_pagesz = PAGE_SIZE;
2509 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2511 rc = crypt_message(server, &rqst, 0);
2512 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2517 memmove(buf + 4, iov[1].iov_base, buf_data_size);
2518 hdr = (struct smb2_hdr *)buf;
2519 hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2520 server->total_read = buf_data_size + page_data_size + 4;
2526 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2527 unsigned int npages, unsigned int len)
2532 for (i = 0; i < npages; i++) {
2533 struct page *page = pages[i];
2537 if (len >= PAGE_SIZE) {
2538 /* enough data to fill the page */
2542 zero_user(page, len, PAGE_SIZE - len);
2545 length = cifs_read_page_from_socket(server, page, n);
2548 server->total_read += length;
2555 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2556 unsigned int cur_off, struct bio_vec **page_vec)
2558 struct bio_vec *bvec;
2561 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2565 for (i = 0; i < npages; i++) {
2566 bvec[i].bv_page = pages[i];
2567 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2568 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2569 data_size -= bvec[i].bv_len;
2572 if (data_size != 0) {
2573 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2583 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2584 char *buf, unsigned int buf_len, struct page **pages,
2585 unsigned int npages, unsigned int page_data_size)
2587 unsigned int data_offset;
2588 unsigned int data_len;
2589 unsigned int cur_off;
2590 unsigned int cur_page_idx;
2591 unsigned int pad_len;
2592 struct cifs_readdata *rdata = mid->callback_data;
2593 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2594 struct bio_vec *bvec = NULL;
2595 struct iov_iter iter;
2599 if (shdr->Command != SMB2_READ) {
2600 cifs_dbg(VFS, "only big read responses are supported\n");
2604 if (server->ops->is_session_expired &&
2605 server->ops->is_session_expired(buf)) {
2606 cifs_reconnect(server);
2607 wake_up(&server->response_q);
2611 if (server->ops->is_status_pending &&
2612 server->ops->is_status_pending(buf, server, 0))
2615 /* set up first two iov to get credits */
2616 rdata->iov[0].iov_base = buf;
2617 rdata->iov[0].iov_len = 4;
2618 rdata->iov[1].iov_base = buf + 4;
2619 rdata->iov[1].iov_len =
2620 min_t(unsigned int, buf_len, server->vals->read_rsp_size) - 4;
2621 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2622 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
2623 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
2624 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
2626 rdata->result = server->ops->map_error(buf, true);
2627 if (rdata->result != 0) {
2628 cifs_dbg(FYI, "%s: server returned error %d\n",
2629 __func__, rdata->result);
2630 /* normal error on read response */
2631 dequeue_mid(mid, false);
2635 data_offset = server->ops->read_data_offset(buf) + 4;
2636 data_len = server->ops->read_data_length(buf);
2638 if (data_offset < server->vals->read_rsp_size) {
2640 * win2k8 sometimes sends an offset of 0 when the read
2641 * is beyond the EOF. Treat it as if the data starts just after
2644 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2645 __func__, data_offset);
2646 data_offset = server->vals->read_rsp_size;
2647 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2648 /* data_offset is beyond the end of smallbuf */
2649 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2650 __func__, data_offset);
2651 rdata->result = -EIO;
2652 dequeue_mid(mid, rdata->result);
2656 pad_len = data_offset - server->vals->read_rsp_size;
2658 if (buf_len <= data_offset) {
2659 /* read response payload is in pages */
2660 cur_page_idx = pad_len / PAGE_SIZE;
2661 cur_off = pad_len % PAGE_SIZE;
2663 if (cur_page_idx != 0) {
2664 /* data offset is beyond the 1st page of response */
2665 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2666 __func__, data_offset);
2667 rdata->result = -EIO;
2668 dequeue_mid(mid, rdata->result);
2672 if (data_len > page_data_size - pad_len) {
2673 /* data_len is corrupt -- discard frame */
2674 rdata->result = -EIO;
2675 dequeue_mid(mid, rdata->result);
2679 rdata->result = init_read_bvec(pages, npages, page_data_size,
2681 if (rdata->result != 0) {
2682 dequeue_mid(mid, rdata->result);
2686 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2687 } else if (buf_len >= data_offset + data_len) {
2688 /* read response payload is in buf */
2689 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2690 iov.iov_base = buf + data_offset;
2691 iov.iov_len = data_len;
2692 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2694 /* read response payload cannot be in both buf and pages */
2695 WARN_ONCE(1, "buf can not contain only a part of read data");
2696 rdata->result = -EIO;
2697 dequeue_mid(mid, rdata->result);
2701 length = rdata->copy_into_pages(server, rdata, &iter);
2708 dequeue_mid(mid, false);
2713 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2715 char *buf = server->smallbuf;
2716 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2717 unsigned int npages;
2718 struct page **pages;
2720 unsigned int buflen = get_rfc1002_length(buf) + 4;
2724 len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2725 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2727 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2730 server->total_read += rc;
2732 len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2733 server->vals->read_rsp_size;
2734 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2736 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2742 for (; i < npages; i++) {
2743 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2750 /* read read data into pages */
2751 rc = read_data_into_pages(server, pages, npages, len);
2755 rc = cifs_discard_remaining_data(server);
2759 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2760 pages, npages, len);
2764 *mid = smb2_find_mid(server, buf);
2766 cifs_dbg(FYI, "mid not found\n");
2768 cifs_dbg(FYI, "mid found\n");
2769 (*mid)->decrypted = true;
2770 rc = handle_read_data(server, *mid, buf,
2771 server->vals->read_rsp_size,
2772 pages, npages, len);
2776 for (i = i - 1; i >= 0; i--)
2781 cifs_discard_remaining_data(server);
2786 receive_encrypted_standard(struct TCP_Server_Info *server,
2787 struct mid_q_entry **mid)
2790 char *buf = server->smallbuf;
2791 unsigned int pdu_length = get_rfc1002_length(buf);
2792 unsigned int buf_size;
2793 struct mid_q_entry *mid_entry;
2795 /* switch to large buffer if too big for a small one */
2796 if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2797 server->large_buf = true;
2798 memcpy(server->bigbuf, buf, server->total_read);
2799 buf = server->bigbuf;
2802 /* now read the rest */
2803 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2804 pdu_length - HEADER_SIZE(server) + 1 + 4);
2807 server->total_read += length;
2809 buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2810 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2814 mid_entry = smb2_find_mid(server, buf);
2815 if (mid_entry == NULL)
2816 cifs_dbg(FYI, "mid not found\n");
2818 cifs_dbg(FYI, "mid found\n");
2819 mid_entry->decrypted = true;
2824 if (mid_entry && mid_entry->handle)
2825 return mid_entry->handle(server, mid_entry);
2827 return cifs_handle_standard(server, mid_entry);
2831 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2833 char *buf = server->smallbuf;
2834 unsigned int pdu_length = get_rfc1002_length(buf);
2835 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2836 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2838 if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2839 sizeof(struct smb2_sync_hdr)) {
2840 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2842 cifs_reconnect(server);
2843 wake_up(&server->response_q);
2844 return -ECONNABORTED;
2847 if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2848 cifs_dbg(VFS, "Transform message is broken\n");
2849 cifs_reconnect(server);
2850 wake_up(&server->response_q);
2851 return -ECONNABORTED;
2854 if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2855 return receive_encrypted_read(server, mid);
2857 return receive_encrypted_standard(server, mid);
2861 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2863 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2865 return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2869 struct smb_version_operations smb20_operations = {
2870 .compare_fids = smb2_compare_fids,
2871 .setup_request = smb2_setup_request,
2872 .setup_async_request = smb2_setup_async_request,
2873 .check_receive = smb2_check_receive,
2874 .add_credits = smb2_add_credits,
2875 .set_credits = smb2_set_credits,
2876 .get_credits_field = smb2_get_credits_field,
2877 .get_credits = smb2_get_credits,
2878 .wait_mtu_credits = cifs_wait_mtu_credits,
2879 .get_next_mid = smb2_get_next_mid,
2880 .read_data_offset = smb2_read_data_offset,
2881 .read_data_length = smb2_read_data_length,
2882 .map_error = map_smb2_to_linux_error,
2883 .find_mid = smb2_find_mid,
2884 .check_message = smb2_check_message,
2885 .dump_detail = smb2_dump_detail,
2886 .clear_stats = smb2_clear_stats,
2887 .print_stats = smb2_print_stats,
2888 .is_oplock_break = smb2_is_valid_oplock_break,
2889 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2890 .downgrade_oplock = smb2_downgrade_oplock,
2891 .need_neg = smb2_need_neg,
2892 .negotiate = smb2_negotiate,
2893 .negotiate_wsize = smb2_negotiate_wsize,
2894 .negotiate_rsize = smb2_negotiate_rsize,
2895 .sess_setup = SMB2_sess_setup,
2896 .logoff = SMB2_logoff,
2897 .tree_connect = SMB2_tcon,
2898 .tree_disconnect = SMB2_tdis,
2899 .qfs_tcon = smb2_qfs_tcon,
2900 .is_path_accessible = smb2_is_path_accessible,
2901 .can_echo = smb2_can_echo,
2903 .query_path_info = smb2_query_path_info,
2904 .get_srv_inum = smb2_get_srv_inum,
2905 .query_file_info = smb2_query_file_info,
2906 .set_path_size = smb2_set_path_size,
2907 .set_file_size = smb2_set_file_size,
2908 .set_file_info = smb2_set_file_info,
2909 .set_compression = smb2_set_compression,
2910 .mkdir = smb2_mkdir,
2911 .mkdir_setinfo = smb2_mkdir_setinfo,
2912 .rmdir = smb2_rmdir,
2913 .unlink = smb2_unlink,
2914 .rename = smb2_rename_path,
2915 .create_hardlink = smb2_create_hardlink,
2916 .query_symlink = smb2_query_symlink,
2917 .query_mf_symlink = smb3_query_mf_symlink,
2918 .create_mf_symlink = smb3_create_mf_symlink,
2919 .open = smb2_open_file,
2920 .set_fid = smb2_set_fid,
2921 .close = smb2_close_file,
2922 .flush = smb2_flush_file,
2923 .async_readv = smb2_async_readv,
2924 .async_writev = smb2_async_writev,
2925 .sync_read = smb2_sync_read,
2926 .sync_write = smb2_sync_write,
2927 .query_dir_first = smb2_query_dir_first,
2928 .query_dir_next = smb2_query_dir_next,
2929 .close_dir = smb2_close_dir,
2930 .calc_smb_size = smb2_calc_size,
2931 .is_status_pending = smb2_is_status_pending,
2932 .is_session_expired = smb2_is_session_expired,
2933 .oplock_response = smb2_oplock_response,
2934 .queryfs = smb2_queryfs,
2935 .mand_lock = smb2_mand_lock,
2936 .mand_unlock_range = smb2_unlock_range,
2937 .push_mand_locks = smb2_push_mandatory_locks,
2938 .get_lease_key = smb2_get_lease_key,
2939 .set_lease_key = smb2_set_lease_key,
2940 .new_lease_key = smb2_new_lease_key,
2941 .calc_signature = smb2_calc_signature,
2942 .is_read_op = smb2_is_read_op,
2943 .set_oplock_level = smb2_set_oplock_level,
2944 .create_lease_buf = smb2_create_lease_buf,
2945 .parse_lease_buf = smb2_parse_lease_buf,
2946 .copychunk_range = smb2_copychunk_range,
2947 .wp_retry_size = smb2_wp_retry_size,
2948 .dir_needs_close = smb2_dir_needs_close,
2949 .get_dfs_refer = smb2_get_dfs_refer,
2950 .select_sectype = smb2_select_sectype,
2951 #ifdef CONFIG_CIFS_XATTR
2952 .query_all_EAs = smb2_query_eas,
2953 .set_EA = smb2_set_ea,
2954 #endif /* CIFS_XATTR */
2955 #ifdef CONFIG_CIFS_ACL
2956 .get_acl = get_smb2_acl,
2957 .get_acl_by_fid = get_smb2_acl_by_fid,
2958 .set_acl = set_smb2_acl,
2959 #endif /* CIFS_ACL */
2962 struct smb_version_operations smb21_operations = {
2963 .compare_fids = smb2_compare_fids,
2964 .setup_request = smb2_setup_request,
2965 .setup_async_request = smb2_setup_async_request,
2966 .check_receive = smb2_check_receive,
2967 .add_credits = smb2_add_credits,
2968 .set_credits = smb2_set_credits,
2969 .get_credits_field = smb2_get_credits_field,
2970 .get_credits = smb2_get_credits,
2971 .wait_mtu_credits = smb2_wait_mtu_credits,
2972 .get_next_mid = smb2_get_next_mid,
2973 .read_data_offset = smb2_read_data_offset,
2974 .read_data_length = smb2_read_data_length,
2975 .map_error = map_smb2_to_linux_error,
2976 .find_mid = smb2_find_mid,
2977 .check_message = smb2_check_message,
2978 .dump_detail = smb2_dump_detail,
2979 .clear_stats = smb2_clear_stats,
2980 .print_stats = smb2_print_stats,
2981 .is_oplock_break = smb2_is_valid_oplock_break,
2982 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2983 .downgrade_oplock = smb2_downgrade_oplock,
2984 .need_neg = smb2_need_neg,
2985 .negotiate = smb2_negotiate,
2986 .negotiate_wsize = smb2_negotiate_wsize,
2987 .negotiate_rsize = smb2_negotiate_rsize,
2988 .sess_setup = SMB2_sess_setup,
2989 .logoff = SMB2_logoff,
2990 .tree_connect = SMB2_tcon,
2991 .tree_disconnect = SMB2_tdis,
2992 .qfs_tcon = smb2_qfs_tcon,
2993 .is_path_accessible = smb2_is_path_accessible,
2994 .can_echo = smb2_can_echo,
2996 .query_path_info = smb2_query_path_info,
2997 .get_srv_inum = smb2_get_srv_inum,
2998 .query_file_info = smb2_query_file_info,
2999 .set_path_size = smb2_set_path_size,
3000 .set_file_size = smb2_set_file_size,
3001 .set_file_info = smb2_set_file_info,
3002 .set_compression = smb2_set_compression,
3003 .mkdir = smb2_mkdir,
3004 .mkdir_setinfo = smb2_mkdir_setinfo,
3005 .rmdir = smb2_rmdir,
3006 .unlink = smb2_unlink,
3007 .rename = smb2_rename_path,
3008 .create_hardlink = smb2_create_hardlink,
3009 .query_symlink = smb2_query_symlink,
3010 .query_mf_symlink = smb3_query_mf_symlink,
3011 .create_mf_symlink = smb3_create_mf_symlink,
3012 .open = smb2_open_file,
3013 .set_fid = smb2_set_fid,
3014 .close = smb2_close_file,
3015 .flush = smb2_flush_file,
3016 .async_readv = smb2_async_readv,
3017 .async_writev = smb2_async_writev,
3018 .sync_read = smb2_sync_read,
3019 .sync_write = smb2_sync_write,
3020 .query_dir_first = smb2_query_dir_first,
3021 .query_dir_next = smb2_query_dir_next,
3022 .close_dir = smb2_close_dir,
3023 .calc_smb_size = smb2_calc_size,
3024 .is_status_pending = smb2_is_status_pending,
3025 .is_session_expired = smb2_is_session_expired,
3026 .oplock_response = smb2_oplock_response,
3027 .queryfs = smb2_queryfs,
3028 .mand_lock = smb2_mand_lock,
3029 .mand_unlock_range = smb2_unlock_range,
3030 .push_mand_locks = smb2_push_mandatory_locks,
3031 .get_lease_key = smb2_get_lease_key,
3032 .set_lease_key = smb2_set_lease_key,
3033 .new_lease_key = smb2_new_lease_key,
3034 .calc_signature = smb2_calc_signature,
3035 .is_read_op = smb21_is_read_op,
3036 .set_oplock_level = smb21_set_oplock_level,
3037 .create_lease_buf = smb2_create_lease_buf,
3038 .parse_lease_buf = smb2_parse_lease_buf,
3039 .copychunk_range = smb2_copychunk_range,
3040 .wp_retry_size = smb2_wp_retry_size,
3041 .dir_needs_close = smb2_dir_needs_close,
3042 .enum_snapshots = smb3_enum_snapshots,
3043 .get_dfs_refer = smb2_get_dfs_refer,
3044 .select_sectype = smb2_select_sectype,
3045 #ifdef CONFIG_CIFS_XATTR
3046 .query_all_EAs = smb2_query_eas,
3047 .set_EA = smb2_set_ea,
3048 #endif /* CIFS_XATTR */
3049 #ifdef CONFIG_CIFS_ACL
3050 .get_acl = get_smb2_acl,
3051 .get_acl_by_fid = get_smb2_acl_by_fid,
3052 .set_acl = set_smb2_acl,
3053 #endif /* CIFS_ACL */
3056 struct smb_version_operations smb30_operations = {
3057 .compare_fids = smb2_compare_fids,
3058 .setup_request = smb2_setup_request,
3059 .setup_async_request = smb2_setup_async_request,
3060 .check_receive = smb2_check_receive,
3061 .add_credits = smb2_add_credits,
3062 .set_credits = smb2_set_credits,
3063 .get_credits_field = smb2_get_credits_field,
3064 .get_credits = smb2_get_credits,
3065 .wait_mtu_credits = smb2_wait_mtu_credits,
3066 .get_next_mid = smb2_get_next_mid,
3067 .read_data_offset = smb2_read_data_offset,
3068 .read_data_length = smb2_read_data_length,
3069 .map_error = map_smb2_to_linux_error,
3070 .find_mid = smb2_find_mid,
3071 .check_message = smb2_check_message,
3072 .dump_detail = smb2_dump_detail,
3073 .clear_stats = smb2_clear_stats,
3074 .print_stats = smb2_print_stats,
3075 .dump_share_caps = smb2_dump_share_caps,
3076 .is_oplock_break = smb2_is_valid_oplock_break,
3077 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3078 .downgrade_oplock = smb3_downgrade_oplock,
3079 .need_neg = smb2_need_neg,
3080 .negotiate = smb2_negotiate,
3081 .negotiate_wsize = smb2_negotiate_wsize,
3082 .negotiate_rsize = smb2_negotiate_rsize,
3083 .sess_setup = SMB2_sess_setup,
3084 .logoff = SMB2_logoff,
3085 .tree_connect = SMB2_tcon,
3086 .tree_disconnect = SMB2_tdis,
3087 .qfs_tcon = smb3_qfs_tcon,
3088 .is_path_accessible = smb2_is_path_accessible,
3089 .can_echo = smb2_can_echo,
3091 .query_path_info = smb2_query_path_info,
3092 .get_srv_inum = smb2_get_srv_inum,
3093 .query_file_info = smb2_query_file_info,
3094 .set_path_size = smb2_set_path_size,
3095 .set_file_size = smb2_set_file_size,
3096 .set_file_info = smb2_set_file_info,
3097 .set_compression = smb2_set_compression,
3098 .mkdir = smb2_mkdir,
3099 .mkdir_setinfo = smb2_mkdir_setinfo,
3100 .rmdir = smb2_rmdir,
3101 .unlink = smb2_unlink,
3102 .rename = smb2_rename_path,
3103 .create_hardlink = smb2_create_hardlink,
3104 .query_symlink = smb2_query_symlink,
3105 .query_mf_symlink = smb3_query_mf_symlink,
3106 .create_mf_symlink = smb3_create_mf_symlink,
3107 .open = smb2_open_file,
3108 .set_fid = smb2_set_fid,
3109 .close = smb2_close_file,
3110 .flush = smb2_flush_file,
3111 .async_readv = smb2_async_readv,
3112 .async_writev = smb2_async_writev,
3113 .sync_read = smb2_sync_read,
3114 .sync_write = smb2_sync_write,
3115 .query_dir_first = smb2_query_dir_first,
3116 .query_dir_next = smb2_query_dir_next,
3117 .close_dir = smb2_close_dir,
3118 .calc_smb_size = smb2_calc_size,
3119 .is_status_pending = smb2_is_status_pending,
3120 .is_session_expired = smb2_is_session_expired,
3121 .oplock_response = smb2_oplock_response,
3122 .queryfs = smb2_queryfs,
3123 .mand_lock = smb2_mand_lock,
3124 .mand_unlock_range = smb2_unlock_range,
3125 .push_mand_locks = smb2_push_mandatory_locks,
3126 .get_lease_key = smb2_get_lease_key,
3127 .set_lease_key = smb2_set_lease_key,
3128 .new_lease_key = smb2_new_lease_key,
3129 .generate_signingkey = generate_smb30signingkey,
3130 .calc_signature = smb3_calc_signature,
3131 .set_integrity = smb3_set_integrity,
3132 .is_read_op = smb21_is_read_op,
3133 .set_oplock_level = smb3_set_oplock_level,
3134 .create_lease_buf = smb3_create_lease_buf,
3135 .parse_lease_buf = smb3_parse_lease_buf,
3136 .copychunk_range = smb2_copychunk_range,
3137 .duplicate_extents = smb2_duplicate_extents,
3138 .validate_negotiate = smb3_validate_negotiate,
3139 .wp_retry_size = smb2_wp_retry_size,
3140 .dir_needs_close = smb2_dir_needs_close,
3141 .fallocate = smb3_fallocate,
3142 .enum_snapshots = smb3_enum_snapshots,
3143 .init_transform_rq = smb3_init_transform_rq,
3144 .free_transform_rq = smb3_free_transform_rq,
3145 .is_transform_hdr = smb3_is_transform_hdr,
3146 .receive_transform = smb3_receive_transform,
3147 .get_dfs_refer = smb2_get_dfs_refer,
3148 .select_sectype = smb2_select_sectype,
3149 #ifdef CONFIG_CIFS_XATTR
3150 .query_all_EAs = smb2_query_eas,
3151 .set_EA = smb2_set_ea,
3152 #endif /* CIFS_XATTR */
3153 #ifdef CONFIG_CIFS_ACL
3154 .get_acl = get_smb2_acl,
3155 .get_acl_by_fid = get_smb2_acl_by_fid,
3156 .set_acl = set_smb2_acl,
3157 #endif /* CIFS_ACL */
3160 #ifdef CONFIG_CIFS_SMB311
3161 struct smb_version_operations smb311_operations = {
3162 .compare_fids = smb2_compare_fids,
3163 .setup_request = smb2_setup_request,
3164 .setup_async_request = smb2_setup_async_request,
3165 .check_receive = smb2_check_receive,
3166 .add_credits = smb2_add_credits,
3167 .set_credits = smb2_set_credits,
3168 .get_credits_field = smb2_get_credits_field,
3169 .get_credits = smb2_get_credits,
3170 .wait_mtu_credits = smb2_wait_mtu_credits,
3171 .get_next_mid = smb2_get_next_mid,
3172 .read_data_offset = smb2_read_data_offset,
3173 .read_data_length = smb2_read_data_length,
3174 .map_error = map_smb2_to_linux_error,
3175 .find_mid = smb2_find_mid,
3176 .check_message = smb2_check_message,
3177 .dump_detail = smb2_dump_detail,
3178 .clear_stats = smb2_clear_stats,
3179 .print_stats = smb2_print_stats,
3180 .dump_share_caps = smb2_dump_share_caps,
3181 .is_oplock_break = smb2_is_valid_oplock_break,
3182 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3183 .downgrade_oplock = smb3_downgrade_oplock,
3184 .need_neg = smb2_need_neg,
3185 .negotiate = smb2_negotiate,
3186 .negotiate_wsize = smb2_negotiate_wsize,
3187 .negotiate_rsize = smb2_negotiate_rsize,
3188 .sess_setup = SMB2_sess_setup,
3189 .logoff = SMB2_logoff,
3190 .tree_connect = SMB2_tcon,
3191 .tree_disconnect = SMB2_tdis,
3192 .qfs_tcon = smb3_qfs_tcon,
3193 .is_path_accessible = smb2_is_path_accessible,
3194 .can_echo = smb2_can_echo,
3196 .query_path_info = smb2_query_path_info,
3197 .get_srv_inum = smb2_get_srv_inum,
3198 .query_file_info = smb2_query_file_info,
3199 .set_path_size = smb2_set_path_size,
3200 .set_file_size = smb2_set_file_size,
3201 .set_file_info = smb2_set_file_info,
3202 .set_compression = smb2_set_compression,
3203 .mkdir = smb2_mkdir,
3204 .mkdir_setinfo = smb2_mkdir_setinfo,
3205 .rmdir = smb2_rmdir,
3206 .unlink = smb2_unlink,
3207 .rename = smb2_rename_path,
3208 .create_hardlink = smb2_create_hardlink,
3209 .query_symlink = smb2_query_symlink,
3210 .query_mf_symlink = smb3_query_mf_symlink,
3211 .create_mf_symlink = smb3_create_mf_symlink,
3212 .open = smb2_open_file,
3213 .set_fid = smb2_set_fid,
3214 .close = smb2_close_file,
3215 .flush = smb2_flush_file,
3216 .async_readv = smb2_async_readv,
3217 .async_writev = smb2_async_writev,
3218 .sync_read = smb2_sync_read,
3219 .sync_write = smb2_sync_write,
3220 .query_dir_first = smb2_query_dir_first,
3221 .query_dir_next = smb2_query_dir_next,
3222 .close_dir = smb2_close_dir,
3223 .calc_smb_size = smb2_calc_size,
3224 .is_status_pending = smb2_is_status_pending,
3225 .is_session_expired = smb2_is_session_expired,
3226 .oplock_response = smb2_oplock_response,
3227 .queryfs = smb2_queryfs,
3228 .mand_lock = smb2_mand_lock,
3229 .mand_unlock_range = smb2_unlock_range,
3230 .push_mand_locks = smb2_push_mandatory_locks,
3231 .get_lease_key = smb2_get_lease_key,
3232 .set_lease_key = smb2_set_lease_key,
3233 .new_lease_key = smb2_new_lease_key,
3234 .generate_signingkey = generate_smb311signingkey,
3235 .calc_signature = smb3_calc_signature,
3236 .set_integrity = smb3_set_integrity,
3237 .is_read_op = smb21_is_read_op,
3238 .set_oplock_level = smb3_set_oplock_level,
3239 .create_lease_buf = smb3_create_lease_buf,
3240 .parse_lease_buf = smb3_parse_lease_buf,
3241 .copychunk_range = smb2_copychunk_range,
3242 .duplicate_extents = smb2_duplicate_extents,
3243 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3244 .wp_retry_size = smb2_wp_retry_size,
3245 .dir_needs_close = smb2_dir_needs_close,
3246 .fallocate = smb3_fallocate,
3247 .enum_snapshots = smb3_enum_snapshots,
3248 .init_transform_rq = smb3_init_transform_rq,
3249 .free_transform_rq = smb3_free_transform_rq,
3250 .is_transform_hdr = smb3_is_transform_hdr,
3251 .receive_transform = smb3_receive_transform,
3252 .get_dfs_refer = smb2_get_dfs_refer,
3253 .select_sectype = smb2_select_sectype,
3254 #ifdef CONFIG_CIFS_XATTR
3255 .query_all_EAs = smb2_query_eas,
3256 .set_EA = smb2_set_ea,
3257 #endif /* CIFS_XATTR */
3259 #endif /* CIFS_SMB311 */
3261 struct smb_version_values smb20_values = {
3262 .version_string = SMB20_VERSION_STRING,
3263 .protocol_id = SMB20_PROT_ID,
3264 .req_capabilities = 0, /* MBZ */
3265 .large_lock_type = 0,
3266 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3267 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3268 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3269 .header_size = sizeof(struct smb2_hdr),
3270 .max_header_size = MAX_SMB2_HDR_SIZE,
3271 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3272 .lock_cmd = SMB2_LOCK,
3274 .cap_nt_find = SMB2_NT_FIND,
3275 .cap_large_files = SMB2_LARGE_FILES,
3276 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3277 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3278 .create_lease_size = sizeof(struct create_lease),
3281 struct smb_version_values smb21_values = {
3282 .version_string = SMB21_VERSION_STRING,
3283 .protocol_id = SMB21_PROT_ID,
3284 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3285 .large_lock_type = 0,
3286 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3287 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3288 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3289 .header_size = sizeof(struct smb2_hdr),
3290 .max_header_size = MAX_SMB2_HDR_SIZE,
3291 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3292 .lock_cmd = SMB2_LOCK,
3294 .cap_nt_find = SMB2_NT_FIND,
3295 .cap_large_files = SMB2_LARGE_FILES,
3296 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3297 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3298 .create_lease_size = sizeof(struct create_lease),
3301 struct smb_version_values smb3any_values = {
3302 .version_string = SMB3ANY_VERSION_STRING,
3303 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3304 .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,
3305 .large_lock_type = 0,
3306 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3307 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3308 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3309 .header_size = sizeof(struct smb2_hdr),
3310 .max_header_size = MAX_SMB2_HDR_SIZE,
3311 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3312 .lock_cmd = SMB2_LOCK,
3314 .cap_nt_find = SMB2_NT_FIND,
3315 .cap_large_files = SMB2_LARGE_FILES,
3316 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3317 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3318 .create_lease_size = sizeof(struct create_lease_v2),
3321 struct smb_version_values smbdefault_values = {
3322 .version_string = SMBDEFAULT_VERSION_STRING,
3323 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3324 .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,
3325 .large_lock_type = 0,
3326 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3327 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3328 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3329 .header_size = sizeof(struct smb2_hdr),
3330 .max_header_size = MAX_SMB2_HDR_SIZE,
3331 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3332 .lock_cmd = SMB2_LOCK,
3334 .cap_nt_find = SMB2_NT_FIND,
3335 .cap_large_files = SMB2_LARGE_FILES,
3336 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3337 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3338 .create_lease_size = sizeof(struct create_lease_v2),
3341 struct smb_version_values smb30_values = {
3342 .version_string = SMB30_VERSION_STRING,
3343 .protocol_id = SMB30_PROT_ID,
3344 .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,
3345 .large_lock_type = 0,
3346 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3347 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3348 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3349 .header_size = sizeof(struct smb2_hdr),
3350 .max_header_size = MAX_SMB2_HDR_SIZE,
3351 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3352 .lock_cmd = SMB2_LOCK,
3354 .cap_nt_find = SMB2_NT_FIND,
3355 .cap_large_files = SMB2_LARGE_FILES,
3356 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3357 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3358 .create_lease_size = sizeof(struct create_lease_v2),
3361 struct smb_version_values smb302_values = {
3362 .version_string = SMB302_VERSION_STRING,
3363 .protocol_id = SMB302_PROT_ID,
3364 .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,
3365 .large_lock_type = 0,
3366 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3367 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3368 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3369 .header_size = sizeof(struct smb2_hdr),
3370 .max_header_size = MAX_SMB2_HDR_SIZE,
3371 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3372 .lock_cmd = SMB2_LOCK,
3374 .cap_nt_find = SMB2_NT_FIND,
3375 .cap_large_files = SMB2_LARGE_FILES,
3376 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3377 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3378 .create_lease_size = sizeof(struct create_lease_v2),
3381 #ifdef CONFIG_CIFS_SMB311
3382 struct smb_version_values smb311_values = {
3383 .version_string = SMB311_VERSION_STRING,
3384 .protocol_id = SMB311_PROT_ID,
3385 .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,
3386 .large_lock_type = 0,
3387 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3388 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3389 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3390 .header_size = sizeof(struct smb2_hdr),
3391 .max_header_size = MAX_SMB2_HDR_SIZE,
3392 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3393 .lock_cmd = SMB2_LOCK,
3395 .cap_nt_find = SMB2_NT_FIND,
3396 .cap_large_files = SMB2_LARGE_FILES,
3397 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3398 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3399 .create_lease_size = sizeof(struct create_lease_v2),