1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
7 #include <linux/moduleparam.h>
12 #include "smb_common.h"
13 #include "smbstatus.h"
14 #include "connection.h"
15 #include "mgmt/user_session.h"
16 #include "mgmt/share_config.h"
17 #include "mgmt/tree_connect.h"
19 static LIST_HEAD(lease_table_list);
20 static DEFINE_RWLOCK(lease_list_lock);
23 * alloc_opinfo() - allocate a new opinfo object for oplock info
25 * @id: fid of open file
26 * @Tid: tree id of connection
28 * Return: allocated opinfo object on success, otherwise NULL
30 static struct oplock_info *alloc_opinfo(struct ksmbd_work *work,
33 struct ksmbd_conn *conn = work->conn;
34 struct ksmbd_session *sess = work->sess;
35 struct oplock_info *opinfo;
37 opinfo = kzalloc(sizeof(struct oplock_info), GFP_KERNEL);
43 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
44 opinfo->op_state = OPLOCK_STATE_NONE;
45 opinfo->pending_break = 0;
48 INIT_LIST_HEAD(&opinfo->op_entry);
49 INIT_LIST_HEAD(&opinfo->interim_list);
50 init_waitqueue_head(&opinfo->oplock_q);
51 init_waitqueue_head(&opinfo->oplock_brk);
52 atomic_set(&opinfo->refcount, 1);
53 atomic_set(&opinfo->breaking_cnt, 0);
58 static void lease_add_list(struct oplock_info *opinfo)
60 struct lease_table *lb = opinfo->o_lease->l_lb;
62 spin_lock(&lb->lb_lock);
63 list_add_rcu(&opinfo->lease_entry, &lb->lease_list);
64 spin_unlock(&lb->lb_lock);
67 static void lease_del_list(struct oplock_info *opinfo)
69 struct lease_table *lb = opinfo->o_lease->l_lb;
74 spin_lock(&lb->lb_lock);
75 if (list_empty(&opinfo->lease_entry)) {
76 spin_unlock(&lb->lb_lock);
80 list_del_init(&opinfo->lease_entry);
81 opinfo->o_lease->l_lb = NULL;
82 spin_unlock(&lb->lb_lock);
85 static void lb_add(struct lease_table *lb)
87 write_lock(&lease_list_lock);
88 list_add(&lb->l_entry, &lease_table_list);
89 write_unlock(&lease_list_lock);
92 static int alloc_lease(struct oplock_info *opinfo, struct lease_ctx_info *lctx)
96 lease = kmalloc(sizeof(struct lease), GFP_KERNEL);
100 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
101 lease->state = lctx->req_state;
102 lease->new_state = 0;
103 lease->flags = lctx->flags;
104 lease->duration = lctx->duration;
105 lease->is_dir = lctx->is_dir;
106 memcpy(lease->parent_lease_key, lctx->parent_lease_key, SMB2_LEASE_KEY_SIZE);
107 lease->version = lctx->version;
108 lease->epoch = le16_to_cpu(lctx->epoch);
109 INIT_LIST_HEAD(&opinfo->lease_entry);
110 opinfo->o_lease = lease;
115 static void free_lease(struct oplock_info *opinfo)
119 lease = opinfo->o_lease;
123 static void free_opinfo(struct oplock_info *opinfo)
125 if (opinfo->is_lease)
130 static inline void opinfo_free_rcu(struct rcu_head *rcu_head)
132 struct oplock_info *opinfo;
134 opinfo = container_of(rcu_head, struct oplock_info, rcu_head);
138 struct oplock_info *opinfo_get(struct ksmbd_file *fp)
140 struct oplock_info *opinfo;
143 opinfo = rcu_dereference(fp->f_opinfo);
144 if (opinfo && !atomic_inc_not_zero(&opinfo->refcount))
151 static struct oplock_info *opinfo_get_list(struct ksmbd_inode *ci)
153 struct oplock_info *opinfo;
155 if (list_empty(&ci->m_op_list))
159 opinfo = list_first_or_null_rcu(&ci->m_op_list, struct oplock_info,
162 if (!atomic_inc_not_zero(&opinfo->refcount))
165 atomic_inc(&opinfo->conn->r_count);
166 if (ksmbd_conn_releasing(opinfo->conn)) {
167 atomic_dec(&opinfo->conn->r_count);
168 atomic_dec(&opinfo->refcount);
179 static void opinfo_conn_put(struct oplock_info *opinfo)
181 struct ksmbd_conn *conn;
188 * Checking waitqueue to dropping pending requests on
189 * disconnection. waitqueue_active is safe because it
190 * uses atomic operation for condition.
192 if (!atomic_dec_return(&conn->r_count) && waitqueue_active(&conn->r_count_q))
193 wake_up(&conn->r_count_q);
197 void opinfo_put(struct oplock_info *opinfo)
199 if (!atomic_dec_and_test(&opinfo->refcount))
202 call_rcu(&opinfo->rcu_head, opinfo_free_rcu);
205 static void opinfo_add(struct oplock_info *opinfo)
207 struct ksmbd_inode *ci = opinfo->o_fp->f_ci;
209 write_lock(&ci->m_lock);
210 list_add_rcu(&opinfo->op_entry, &ci->m_op_list);
211 write_unlock(&ci->m_lock);
214 static void opinfo_del(struct oplock_info *opinfo)
216 struct ksmbd_inode *ci = opinfo->o_fp->f_ci;
218 if (opinfo->is_lease) {
219 write_lock(&lease_list_lock);
220 lease_del_list(opinfo);
221 write_unlock(&lease_list_lock);
223 write_lock(&ci->m_lock);
224 list_del_rcu(&opinfo->op_entry);
225 write_unlock(&ci->m_lock);
228 static unsigned long opinfo_count(struct ksmbd_file *fp)
230 if (ksmbd_stream_fd(fp))
231 return atomic_read(&fp->f_ci->sop_count);
233 return atomic_read(&fp->f_ci->op_count);
236 static void opinfo_count_inc(struct ksmbd_file *fp)
238 if (ksmbd_stream_fd(fp))
239 return atomic_inc(&fp->f_ci->sop_count);
241 return atomic_inc(&fp->f_ci->op_count);
244 static void opinfo_count_dec(struct ksmbd_file *fp)
246 if (ksmbd_stream_fd(fp))
247 return atomic_dec(&fp->f_ci->sop_count);
249 return atomic_dec(&fp->f_ci->op_count);
253 * opinfo_write_to_read() - convert a write oplock to read oplock
254 * @opinfo: current oplock info
256 * Return: 0 on success, otherwise -EINVAL
258 int opinfo_write_to_read(struct oplock_info *opinfo)
260 struct lease *lease = opinfo->o_lease;
262 if (!(opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
263 opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) {
264 pr_err("bad oplock(0x%x)\n", opinfo->level);
265 if (opinfo->is_lease)
266 pr_err("lease state(0x%x)\n", lease->state);
269 opinfo->level = SMB2_OPLOCK_LEVEL_II;
271 if (opinfo->is_lease)
272 lease->state = lease->new_state;
277 * opinfo_read_handle_to_read() - convert a read/handle oplock to read oplock
278 * @opinfo: current oplock info
280 * Return: 0 on success, otherwise -EINVAL
282 int opinfo_read_handle_to_read(struct oplock_info *opinfo)
284 struct lease *lease = opinfo->o_lease;
286 lease->state = lease->new_state;
287 opinfo->level = SMB2_OPLOCK_LEVEL_II;
292 * opinfo_write_to_none() - convert a write oplock to none
293 * @opinfo: current oplock info
295 * Return: 0 on success, otherwise -EINVAL
297 int opinfo_write_to_none(struct oplock_info *opinfo)
299 struct lease *lease = opinfo->o_lease;
301 if (!(opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
302 opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) {
303 pr_err("bad oplock(0x%x)\n", opinfo->level);
304 if (opinfo->is_lease)
305 pr_err("lease state(0x%x)\n", lease->state);
308 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
309 if (opinfo->is_lease)
310 lease->state = lease->new_state;
315 * opinfo_read_to_none() - convert a write read to none
316 * @opinfo: current oplock info
318 * Return: 0 on success, otherwise -EINVAL
320 int opinfo_read_to_none(struct oplock_info *opinfo)
322 struct lease *lease = opinfo->o_lease;
324 if (opinfo->level != SMB2_OPLOCK_LEVEL_II) {
325 pr_err("bad oplock(0x%x)\n", opinfo->level);
326 if (opinfo->is_lease)
327 pr_err("lease state(0x%x)\n", lease->state);
330 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
331 if (opinfo->is_lease)
332 lease->state = lease->new_state;
337 * lease_read_to_write() - upgrade lease state from read to write
338 * @opinfo: current lease info
340 * Return: 0 on success, otherwise -EINVAL
342 int lease_read_to_write(struct oplock_info *opinfo)
344 struct lease *lease = opinfo->o_lease;
346 if (!(lease->state & SMB2_LEASE_READ_CACHING_LE)) {
347 ksmbd_debug(OPLOCK, "bad lease state(0x%x)\n", lease->state);
351 lease->new_state = SMB2_LEASE_NONE_LE;
352 lease->state |= SMB2_LEASE_WRITE_CACHING_LE;
353 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
354 opinfo->level = SMB2_OPLOCK_LEVEL_BATCH;
356 opinfo->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
361 * lease_none_upgrade() - upgrade lease state from none
362 * @opinfo: current lease info
363 * @new_state: new lease state
365 * Return: 0 on success, otherwise -EINVAL
367 static int lease_none_upgrade(struct oplock_info *opinfo, __le32 new_state)
369 struct lease *lease = opinfo->o_lease;
371 if (!(lease->state == SMB2_LEASE_NONE_LE)) {
372 ksmbd_debug(OPLOCK, "bad lease state(0x%x)\n", lease->state);
376 lease->new_state = SMB2_LEASE_NONE_LE;
377 lease->state = new_state;
378 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
379 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
380 opinfo->level = SMB2_OPLOCK_LEVEL_BATCH;
382 opinfo->level = SMB2_OPLOCK_LEVEL_II;
383 else if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
384 opinfo->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
385 else if (lease->state & SMB2_LEASE_READ_CACHING_LE)
386 opinfo->level = SMB2_OPLOCK_LEVEL_II;
392 * close_id_del_oplock() - release oplock object at file close time
393 * @fp: ksmbd file pointer
395 void close_id_del_oplock(struct ksmbd_file *fp)
397 struct oplock_info *opinfo;
399 if (S_ISDIR(file_inode(fp->filp)->i_mode))
402 opinfo = opinfo_get(fp);
408 rcu_assign_pointer(fp->f_opinfo, NULL);
409 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
410 opinfo->op_state = OPLOCK_CLOSING;
411 wake_up_interruptible_all(&opinfo->oplock_q);
412 if (opinfo->is_lease) {
413 atomic_set(&opinfo->breaking_cnt, 0);
414 wake_up_interruptible_all(&opinfo->oplock_brk);
418 opinfo_count_dec(fp);
419 atomic_dec(&opinfo->refcount);
424 * grant_write_oplock() - grant exclusive/batch oplock or write lease
425 * @opinfo_new: new oplock info object
426 * @req_oplock: request oplock
427 * @lctx: lease context information
431 static void grant_write_oplock(struct oplock_info *opinfo_new, int req_oplock,
432 struct lease_ctx_info *lctx)
434 struct lease *lease = opinfo_new->o_lease;
436 if (req_oplock == SMB2_OPLOCK_LEVEL_BATCH)
437 opinfo_new->level = SMB2_OPLOCK_LEVEL_BATCH;
439 opinfo_new->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
442 lease->state = lctx->req_state;
443 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
448 * grant_read_oplock() - grant level2 oplock or read lease
449 * @opinfo_new: new oplock info object
450 * @lctx: lease context information
454 static void grant_read_oplock(struct oplock_info *opinfo_new,
455 struct lease_ctx_info *lctx)
457 struct lease *lease = opinfo_new->o_lease;
459 opinfo_new->level = SMB2_OPLOCK_LEVEL_II;
462 lease->state = SMB2_LEASE_READ_CACHING_LE;
463 if (lctx->req_state & SMB2_LEASE_HANDLE_CACHING_LE)
464 lease->state |= SMB2_LEASE_HANDLE_CACHING_LE;
465 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
470 * grant_none_oplock() - grant none oplock or none lease
471 * @opinfo_new: new oplock info object
472 * @lctx: lease context information
476 static void grant_none_oplock(struct oplock_info *opinfo_new,
477 struct lease_ctx_info *lctx)
479 struct lease *lease = opinfo_new->o_lease;
481 opinfo_new->level = SMB2_OPLOCK_LEVEL_NONE;
485 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
489 static inline int compare_guid_key(struct oplock_info *opinfo,
490 const char *guid1, const char *key1)
492 const char *guid2, *key2;
494 guid2 = opinfo->conn->ClientGUID;
495 key2 = opinfo->o_lease->lease_key;
496 if (!memcmp(guid1, guid2, SMB2_CLIENT_GUID_SIZE) &&
497 !memcmp(key1, key2, SMB2_LEASE_KEY_SIZE))
504 * same_client_has_lease() - check whether current lease request is
505 * from lease owner of file
506 * @ci: master file pointer
507 * @client_guid: Client GUID
508 * @lctx: lease context information
510 * Return: oplock(lease) object on success, otherwise NULL
512 static struct oplock_info *same_client_has_lease(struct ksmbd_inode *ci,
514 struct lease_ctx_info *lctx)
518 struct oplock_info *opinfo;
519 struct oplock_info *m_opinfo = NULL;
525 * Compare lease key and client_guid to know request from same owner
528 read_lock(&ci->m_lock);
529 list_for_each_entry(opinfo, &ci->m_op_list, op_entry) {
530 if (!opinfo->is_lease)
532 read_unlock(&ci->m_lock);
533 lease = opinfo->o_lease;
535 ret = compare_guid_key(opinfo, client_guid, lctx->lease_key);
538 /* skip upgrading lease about breaking lease */
539 if (atomic_read(&opinfo->breaking_cnt)) {
540 read_lock(&ci->m_lock);
544 /* upgrading lease */
545 if ((atomic_read(&ci->op_count) +
546 atomic_read(&ci->sop_count)) == 1) {
547 if (lease->state != SMB2_LEASE_NONE_LE &&
548 lease->state == (lctx->req_state & lease->state)) {
549 lease->state |= lctx->req_state;
550 if (lctx->req_state &
551 SMB2_LEASE_WRITE_CACHING_LE)
552 lease_read_to_write(opinfo);
555 } else if ((atomic_read(&ci->op_count) +
556 atomic_read(&ci->sop_count)) > 1) {
557 if (lctx->req_state ==
558 (SMB2_LEASE_READ_CACHING_LE |
559 SMB2_LEASE_HANDLE_CACHING_LE))
560 lease->state = lctx->req_state;
563 if (lctx->req_state && lease->state ==
565 lease_none_upgrade(opinfo, lctx->req_state);
567 read_lock(&ci->m_lock);
569 read_unlock(&ci->m_lock);
574 static void wait_for_break_ack(struct oplock_info *opinfo)
578 rc = wait_event_interruptible_timeout(opinfo->oplock_q,
579 opinfo->op_state == OPLOCK_STATE_NONE ||
580 opinfo->op_state == OPLOCK_CLOSING,
583 /* is this a timeout ? */
585 if (opinfo->is_lease)
586 opinfo->o_lease->state = SMB2_LEASE_NONE_LE;
587 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
588 opinfo->op_state = OPLOCK_STATE_NONE;
592 static void wake_up_oplock_break(struct oplock_info *opinfo)
594 clear_bit_unlock(0, &opinfo->pending_break);
595 /* memory barrier is needed for wake_up_bit() */
596 smp_mb__after_atomic();
597 wake_up_bit(&opinfo->pending_break, 0);
600 static int oplock_break_pending(struct oplock_info *opinfo, int req_op_level)
602 while (test_and_set_bit(0, &opinfo->pending_break)) {
603 wait_on_bit(&opinfo->pending_break, 0, TASK_UNINTERRUPTIBLE);
605 /* Not immediately break to none. */
606 opinfo->open_trunc = 0;
608 if (opinfo->op_state == OPLOCK_CLOSING)
610 else if (!opinfo->is_lease && opinfo->level <= req_op_level)
614 if (!opinfo->is_lease && opinfo->level <= req_op_level) {
615 wake_up_oplock_break(opinfo);
622 * __smb2_oplock_break_noti() - send smb2 oplock break cmd from conn
624 * @wk: smb work object
626 * There are two ways this function can be called. 1- while file open we break
627 * from exclusive/batch lock to levelII oplock and 2- while file write/truncate
628 * we break from levelII oplock no oplock.
629 * work->request_buf contains oplock_info.
631 static void __smb2_oplock_break_noti(struct work_struct *wk)
633 struct smb2_oplock_break *rsp = NULL;
634 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work);
635 struct oplock_break_info *br_info = work->request_buf;
636 struct smb2_hdr *rsp_hdr;
637 struct ksmbd_file *fp;
639 fp = ksmbd_lookup_durable_fd(br_info->fid);
643 if (allocate_interim_rsp_buf(work)) {
644 pr_err("smb2_allocate_rsp_buf failed! ");
645 ksmbd_fd_put(work, fp);
649 rsp_hdr = smb2_get_msg(work->response_buf);
650 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
651 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
652 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
653 rsp_hdr->CreditRequest = cpu_to_le16(0);
654 rsp_hdr->Command = SMB2_OPLOCK_BREAK;
655 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
656 rsp_hdr->NextCommand = 0;
657 rsp_hdr->MessageId = cpu_to_le64(-1);
658 rsp_hdr->Id.SyncId.ProcessId = 0;
659 rsp_hdr->Id.SyncId.TreeId = 0;
660 rsp_hdr->SessionId = 0;
661 memset(rsp_hdr->Signature, 0, 16);
663 rsp = smb2_get_msg(work->response_buf);
665 rsp->StructureSize = cpu_to_le16(24);
666 if (!br_info->open_trunc &&
667 (br_info->level == SMB2_OPLOCK_LEVEL_BATCH ||
668 br_info->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
669 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_II;
671 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
674 rsp->PersistentFid = fp->persistent_id;
675 rsp->VolatileFid = fp->volatile_id;
677 ksmbd_fd_put(work, fp);
678 if (ksmbd_iov_pin_rsp(work, (void *)rsp,
679 sizeof(struct smb2_oplock_break)))
683 "sending oplock break v_id %llu p_id = %llu lock level = %d\n",
684 rsp->VolatileFid, rsp->PersistentFid, rsp->OplockLevel);
686 ksmbd_conn_write(work);
689 ksmbd_free_work_struct(work);
693 * smb2_oplock_break_noti() - send smb2 exclusive/batch to level2 oplock
694 * break command from server to client
695 * @opinfo: oplock info object
697 * Return: 0 on success, otherwise error
699 static int smb2_oplock_break_noti(struct oplock_info *opinfo)
701 struct ksmbd_conn *conn = opinfo->conn;
702 struct oplock_break_info *br_info;
704 struct ksmbd_work *work = ksmbd_alloc_work_struct();
709 br_info = kmalloc(sizeof(struct oplock_break_info), GFP_KERNEL);
711 ksmbd_free_work_struct(work);
715 br_info->level = opinfo->level;
716 br_info->fid = opinfo->fid;
717 br_info->open_trunc = opinfo->open_trunc;
719 work->request_buf = (char *)br_info;
721 work->sess = opinfo->sess;
723 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
724 INIT_WORK(&work->work, __smb2_oplock_break_noti);
725 ksmbd_queue_work(work);
727 wait_for_break_ack(opinfo);
729 __smb2_oplock_break_noti(&work->work);
730 if (opinfo->level == SMB2_OPLOCK_LEVEL_II)
731 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
737 * __smb2_lease_break_noti() - send lease break command from server
739 * @wk: smb work object
741 static void __smb2_lease_break_noti(struct work_struct *wk)
743 struct smb2_lease_break *rsp = NULL;
744 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work);
745 struct lease_break_info *br_info = work->request_buf;
746 struct smb2_hdr *rsp_hdr;
748 if (allocate_interim_rsp_buf(work)) {
749 ksmbd_debug(OPLOCK, "smb2_allocate_rsp_buf failed! ");
753 rsp_hdr = smb2_get_msg(work->response_buf);
754 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
755 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
756 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
757 rsp_hdr->CreditRequest = cpu_to_le16(0);
758 rsp_hdr->Command = SMB2_OPLOCK_BREAK;
759 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
760 rsp_hdr->NextCommand = 0;
761 rsp_hdr->MessageId = cpu_to_le64(-1);
762 rsp_hdr->Id.SyncId.ProcessId = 0;
763 rsp_hdr->Id.SyncId.TreeId = 0;
764 rsp_hdr->SessionId = 0;
765 memset(rsp_hdr->Signature, 0, 16);
767 rsp = smb2_get_msg(work->response_buf);
768 rsp->StructureSize = cpu_to_le16(44);
769 rsp->Epoch = br_info->epoch;
772 if (br_info->curr_state & (SMB2_LEASE_WRITE_CACHING_LE |
773 SMB2_LEASE_HANDLE_CACHING_LE))
774 rsp->Flags = SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED;
776 memcpy(rsp->LeaseKey, br_info->lease_key, SMB2_LEASE_KEY_SIZE);
777 rsp->CurrentLeaseState = br_info->curr_state;
778 rsp->NewLeaseState = br_info->new_state;
779 rsp->BreakReason = 0;
780 rsp->AccessMaskHint = 0;
781 rsp->ShareMaskHint = 0;
783 if (ksmbd_iov_pin_rsp(work, (void *)rsp,
784 sizeof(struct smb2_lease_break)))
787 ksmbd_conn_write(work);
790 ksmbd_free_work_struct(work);
794 * smb2_lease_break_noti() - break lease when a new client request
796 * @opinfo: conains lease state information
798 * Return: 0 on success, otherwise error
800 static int smb2_lease_break_noti(struct oplock_info *opinfo)
802 struct ksmbd_conn *conn = opinfo->conn;
803 struct list_head *tmp, *t;
804 struct ksmbd_work *work;
805 struct lease_break_info *br_info;
806 struct lease *lease = opinfo->o_lease;
808 work = ksmbd_alloc_work_struct();
812 br_info = kmalloc(sizeof(struct lease_break_info), GFP_KERNEL);
814 ksmbd_free_work_struct(work);
818 br_info->curr_state = lease->state;
819 br_info->new_state = lease->new_state;
820 if (lease->version == 2)
821 br_info->epoch = cpu_to_le16(++lease->epoch);
824 memcpy(br_info->lease_key, lease->lease_key, SMB2_LEASE_KEY_SIZE);
826 work->request_buf = (char *)br_info;
828 work->sess = opinfo->sess;
830 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
831 list_for_each_safe(tmp, t, &opinfo->interim_list) {
832 struct ksmbd_work *in_work;
834 in_work = list_entry(tmp, struct ksmbd_work,
836 setup_async_work(in_work, NULL, NULL);
837 smb2_send_interim_resp(in_work, STATUS_PENDING);
838 list_del_init(&in_work->interim_entry);
839 release_async_work(in_work);
841 INIT_WORK(&work->work, __smb2_lease_break_noti);
842 ksmbd_queue_work(work);
843 wait_for_break_ack(opinfo);
845 __smb2_lease_break_noti(&work->work);
846 if (opinfo->o_lease->new_state == SMB2_LEASE_NONE_LE) {
847 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
848 opinfo->o_lease->state = SMB2_LEASE_NONE_LE;
854 static void wait_lease_breaking(struct oplock_info *opinfo)
856 if (!opinfo->is_lease)
859 wake_up_interruptible_all(&opinfo->oplock_brk);
860 if (atomic_read(&opinfo->breaking_cnt)) {
863 ret = wait_event_interruptible_timeout(opinfo->oplock_brk,
864 atomic_read(&opinfo->breaking_cnt) == 0,
867 atomic_set(&opinfo->breaking_cnt, 0);
871 static int oplock_break(struct oplock_info *brk_opinfo, int req_op_level)
875 /* Need to break exclusive/batch oplock, write lease or overwrite_if */
877 "request to send oplock(level : 0x%x) break notification\n",
880 if (brk_opinfo->is_lease) {
881 struct lease *lease = brk_opinfo->o_lease;
883 atomic_inc(&brk_opinfo->breaking_cnt);
885 err = oplock_break_pending(brk_opinfo, req_op_level);
887 return err < 0 ? err : 0;
889 if (brk_opinfo->open_trunc) {
891 * Create overwrite break trigger the lease break to
894 lease->new_state = SMB2_LEASE_NONE_LE;
896 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) {
897 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
899 SMB2_LEASE_READ_CACHING_LE |
900 SMB2_LEASE_HANDLE_CACHING_LE;
903 SMB2_LEASE_READ_CACHING_LE;
905 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE &&
908 SMB2_LEASE_READ_CACHING_LE;
910 lease->new_state = SMB2_LEASE_NONE_LE;
914 if (lease->state & (SMB2_LEASE_WRITE_CACHING_LE |
915 SMB2_LEASE_HANDLE_CACHING_LE))
916 brk_opinfo->op_state = OPLOCK_ACK_WAIT;
918 atomic_dec(&brk_opinfo->breaking_cnt);
920 err = oplock_break_pending(brk_opinfo, req_op_level);
922 return err < 0 ? err : 0;
924 if (brk_opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
925 brk_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
926 brk_opinfo->op_state = OPLOCK_ACK_WAIT;
929 if (brk_opinfo->is_lease)
930 err = smb2_lease_break_noti(brk_opinfo);
932 err = smb2_oplock_break_noti(brk_opinfo);
934 ksmbd_debug(OPLOCK, "oplock granted = %d\n", brk_opinfo->level);
935 if (brk_opinfo->op_state == OPLOCK_CLOSING)
937 wake_up_oplock_break(brk_opinfo);
939 wait_lease_breaking(brk_opinfo);
944 void destroy_lease_table(struct ksmbd_conn *conn)
946 struct lease_table *lb, *lbtmp;
947 struct oplock_info *opinfo;
949 write_lock(&lease_list_lock);
950 if (list_empty(&lease_table_list)) {
951 write_unlock(&lease_list_lock);
955 list_for_each_entry_safe(lb, lbtmp, &lease_table_list, l_entry) {
956 if (conn && memcmp(lb->client_guid, conn->ClientGUID,
957 SMB2_CLIENT_GUID_SIZE))
961 list_for_each_entry_rcu(opinfo, &lb->lease_list,
964 lease_del_list(opinfo);
968 list_del(&lb->l_entry);
971 write_unlock(&lease_list_lock);
974 int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
975 struct lease_ctx_info *lctx)
977 struct oplock_info *opinfo;
979 struct lease_table *lb;
984 read_lock(&lease_list_lock);
985 if (list_empty(&lease_table_list)) {
986 read_unlock(&lease_list_lock);
990 list_for_each_entry(lb, &lease_table_list, l_entry) {
991 if (!memcmp(lb->client_guid, sess->ClientGUID,
992 SMB2_CLIENT_GUID_SIZE))
995 read_unlock(&lease_list_lock);
1001 list_for_each_entry_rcu(opinfo, &lb->lease_list, lease_entry) {
1002 if (!atomic_inc_not_zero(&opinfo->refcount))
1005 if (opinfo->o_fp->f_ci == ci)
1007 err = compare_guid_key(opinfo, sess->ClientGUID,
1012 "found same lease key is already used in other files\n");
1023 read_unlock(&lease_list_lock);
1027 static void copy_lease(struct oplock_info *op1, struct oplock_info *op2)
1029 struct lease *lease1 = op1->o_lease;
1030 struct lease *lease2 = op2->o_lease;
1032 op2->level = op1->level;
1033 lease2->state = lease1->state;
1034 memcpy(lease2->lease_key, lease1->lease_key,
1035 SMB2_LEASE_KEY_SIZE);
1036 lease2->duration = lease1->duration;
1037 lease2->flags = lease1->flags;
1038 lease2->epoch = lease1->epoch++;
1041 static int add_lease_global_list(struct oplock_info *opinfo)
1043 struct lease_table *lb;
1045 read_lock(&lease_list_lock);
1046 list_for_each_entry(lb, &lease_table_list, l_entry) {
1047 if (!memcmp(lb->client_guid, opinfo->conn->ClientGUID,
1048 SMB2_CLIENT_GUID_SIZE)) {
1049 opinfo->o_lease->l_lb = lb;
1050 lease_add_list(opinfo);
1051 read_unlock(&lease_list_lock);
1055 read_unlock(&lease_list_lock);
1057 lb = kmalloc(sizeof(struct lease_table), GFP_KERNEL);
1061 memcpy(lb->client_guid, opinfo->conn->ClientGUID,
1062 SMB2_CLIENT_GUID_SIZE);
1063 INIT_LIST_HEAD(&lb->lease_list);
1064 spin_lock_init(&lb->lb_lock);
1065 opinfo->o_lease->l_lb = lb;
1066 lease_add_list(opinfo);
1071 static void set_oplock_level(struct oplock_info *opinfo, int level,
1072 struct lease_ctx_info *lctx)
1075 case SMB2_OPLOCK_LEVEL_BATCH:
1076 case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
1077 grant_write_oplock(opinfo, level, lctx);
1079 case SMB2_OPLOCK_LEVEL_II:
1080 grant_read_oplock(opinfo, lctx);
1083 grant_none_oplock(opinfo, lctx);
1088 void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
1089 struct lease_ctx_info *lctx)
1091 struct oplock_info *opinfo;
1092 struct ksmbd_inode *p_ci = NULL;
1094 if (lctx->version != 2)
1097 p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent);
1101 read_lock(&p_ci->m_lock);
1102 list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) {
1103 if (!opinfo->is_lease)
1106 if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE &&
1107 (!(lctx->flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) ||
1108 !compare_guid_key(opinfo, fp->conn->ClientGUID,
1109 lctx->parent_lease_key))) {
1110 if (!atomic_inc_not_zero(&opinfo->refcount))
1113 atomic_inc(&opinfo->conn->r_count);
1114 if (ksmbd_conn_releasing(opinfo->conn)) {
1115 atomic_dec(&opinfo->conn->r_count);
1119 read_unlock(&p_ci->m_lock);
1120 oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE);
1121 opinfo_conn_put(opinfo);
1122 read_lock(&p_ci->m_lock);
1125 read_unlock(&p_ci->m_lock);
1127 ksmbd_inode_put(p_ci);
1131 * smb_grant_oplock() - handle oplock/lease request on file open
1133 * @req_op_level: oplock level
1134 * @pid: id of open file
1135 * @fp: ksmbd file pointer
1136 * @tid: Tree id of connection
1137 * @lctx: lease context information on file open
1138 * @share_ret: share mode
1140 * Return: 0 on success, otherwise error
1142 int smb_grant_oplock(struct ksmbd_work *work, int req_op_level, u64 pid,
1143 struct ksmbd_file *fp, __u16 tid,
1144 struct lease_ctx_info *lctx, int share_ret)
1146 struct ksmbd_session *sess = work->sess;
1148 struct oplock_info *opinfo = NULL, *prev_opinfo = NULL;
1149 struct ksmbd_inode *ci = fp->f_ci;
1150 bool prev_op_has_lease;
1151 __le32 prev_op_state = 0;
1153 opinfo = alloc_opinfo(work, pid, tid);
1158 err = alloc_lease(opinfo, lctx);
1161 opinfo->is_lease = 1;
1164 /* ci does not have any oplock */
1165 if (!opinfo_count(fp))
1168 /* grant none-oplock if second open is trunc */
1169 if (fp->attrib_only && fp->cdoption != FILE_OVERWRITE_IF_LE &&
1170 fp->cdoption != FILE_OVERWRITE_LE &&
1171 fp->cdoption != FILE_SUPERSEDE_LE) {
1172 req_op_level = SMB2_OPLOCK_LEVEL_NONE;
1177 struct oplock_info *m_opinfo;
1179 /* is lease already granted ? */
1180 m_opinfo = same_client_has_lease(ci, sess->ClientGUID,
1183 copy_lease(m_opinfo, opinfo);
1184 if (atomic_read(&m_opinfo->breaking_cnt))
1185 opinfo->o_lease->flags =
1186 SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE;
1190 prev_opinfo = opinfo_get_list(ci);
1192 (prev_opinfo->level == SMB2_OPLOCK_LEVEL_NONE && lctx)) {
1193 opinfo_conn_put(prev_opinfo);
1196 prev_op_has_lease = prev_opinfo->is_lease;
1197 if (prev_op_has_lease)
1198 prev_op_state = prev_opinfo->o_lease->state;
1200 if (share_ret < 0 &&
1201 prev_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1203 opinfo_conn_put(prev_opinfo);
1207 if (prev_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH &&
1208 prev_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1209 opinfo_conn_put(prev_opinfo);
1210 goto op_break_not_needed;
1213 list_add(&work->interim_entry, &prev_opinfo->interim_list);
1214 err = oplock_break(prev_opinfo, SMB2_OPLOCK_LEVEL_II);
1215 opinfo_conn_put(prev_opinfo);
1218 /* Check all oplock was freed by close */
1222 op_break_not_needed:
1223 if (share_ret < 0) {
1228 if (req_op_level != SMB2_OPLOCK_LEVEL_NONE)
1229 req_op_level = SMB2_OPLOCK_LEVEL_II;
1231 /* grant fixed oplock on stacked locking between lease and oplock */
1232 if (prev_op_has_lease && !lctx)
1233 if (prev_op_state & SMB2_LEASE_HANDLE_CACHING_LE)
1234 req_op_level = SMB2_OPLOCK_LEVEL_NONE;
1236 if (!prev_op_has_lease && lctx) {
1237 req_op_level = SMB2_OPLOCK_LEVEL_II;
1238 lctx->req_state = SMB2_LEASE_READ_CACHING_LE;
1242 set_oplock_level(opinfo, req_op_level, lctx);
1245 rcu_assign_pointer(fp->f_opinfo, opinfo);
1248 opinfo_count_inc(fp);
1250 if (opinfo->is_lease) {
1251 err = add_lease_global_list(opinfo);
1258 free_opinfo(opinfo);
1263 * smb_break_all_write_oplock() - break batch/exclusive oplock to level2
1265 * @fp: ksmbd file pointer
1266 * @is_trunc: truncate on open
1268 static void smb_break_all_write_oplock(struct ksmbd_work *work,
1269 struct ksmbd_file *fp, int is_trunc)
1271 struct oplock_info *brk_opinfo;
1273 brk_opinfo = opinfo_get_list(fp->f_ci);
1276 if (brk_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH &&
1277 brk_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1278 opinfo_conn_put(brk_opinfo);
1282 brk_opinfo->open_trunc = is_trunc;
1283 list_add(&work->interim_entry, &brk_opinfo->interim_list);
1284 oplock_break(brk_opinfo, SMB2_OPLOCK_LEVEL_II);
1285 opinfo_conn_put(brk_opinfo);
1289 * smb_break_all_levII_oplock() - send level2 oplock or read lease break command
1290 * from server to client
1292 * @fp: ksmbd file pointer
1293 * @is_trunc: truncate on open
1295 void smb_break_all_levII_oplock(struct ksmbd_work *work, struct ksmbd_file *fp,
1298 struct oplock_info *op, *brk_op;
1299 struct ksmbd_inode *ci;
1300 struct ksmbd_conn *conn = work->conn;
1302 if (!test_share_config_flag(work->tcon->share_conf,
1303 KSMBD_SHARE_FLAG_OPLOCKS))
1307 op = opinfo_get(fp);
1310 list_for_each_entry_rcu(brk_op, &ci->m_op_list, op_entry) {
1311 if (!atomic_inc_not_zero(&brk_op->refcount))
1314 atomic_inc(&brk_op->conn->r_count);
1315 if (ksmbd_conn_releasing(brk_op->conn)) {
1316 atomic_dec(&brk_op->conn->r_count);
1321 if (brk_op->is_lease && (brk_op->o_lease->state &
1322 (~(SMB2_LEASE_READ_CACHING_LE |
1323 SMB2_LEASE_HANDLE_CACHING_LE)))) {
1324 ksmbd_debug(OPLOCK, "unexpected lease state(0x%x)\n",
1325 brk_op->o_lease->state);
1327 } else if (brk_op->level !=
1328 SMB2_OPLOCK_LEVEL_II) {
1329 ksmbd_debug(OPLOCK, "unexpected oplock(0x%x)\n",
1334 /* Skip oplock being break to none */
1335 if (brk_op->is_lease &&
1336 brk_op->o_lease->new_state == SMB2_LEASE_NONE_LE &&
1337 atomic_read(&brk_op->breaking_cnt))
1340 if (op && op->is_lease && brk_op->is_lease &&
1341 !memcmp(conn->ClientGUID, brk_op->conn->ClientGUID,
1342 SMB2_CLIENT_GUID_SIZE) &&
1343 !memcmp(op->o_lease->lease_key, brk_op->o_lease->lease_key,
1344 SMB2_LEASE_KEY_SIZE))
1346 brk_op->open_trunc = is_trunc;
1347 oplock_break(brk_op, SMB2_OPLOCK_LEVEL_NONE);
1349 opinfo_conn_put(brk_op);
1359 * smb_break_all_oplock() - break both batch/exclusive and level2 oplock
1361 * @fp: ksmbd file pointer
1363 void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp)
1365 if (!test_share_config_flag(work->tcon->share_conf,
1366 KSMBD_SHARE_FLAG_OPLOCKS))
1369 smb_break_all_write_oplock(work, fp, 1);
1370 smb_break_all_levII_oplock(work, fp, 1);
1374 * smb2_map_lease_to_oplock() - map lease state to corresponding oplock type
1375 * @lease_state: lease type
1377 * Return: 0 if no mapping, otherwise corresponding oplock type
1379 __u8 smb2_map_lease_to_oplock(__le32 lease_state)
1381 if (lease_state == (SMB2_LEASE_HANDLE_CACHING_LE |
1382 SMB2_LEASE_READ_CACHING_LE |
1383 SMB2_LEASE_WRITE_CACHING_LE)) {
1384 return SMB2_OPLOCK_LEVEL_BATCH;
1385 } else if (lease_state != SMB2_LEASE_WRITE_CACHING_LE &&
1386 lease_state & SMB2_LEASE_WRITE_CACHING_LE) {
1387 if (!(lease_state & SMB2_LEASE_HANDLE_CACHING_LE))
1388 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
1389 } else if (lease_state & SMB2_LEASE_READ_CACHING_LE) {
1390 return SMB2_OPLOCK_LEVEL_II;
1396 * create_lease_buf() - create lease context for open cmd response
1397 * @rbuf: buffer to create lease context response
1398 * @lease: buffer to stored parsed lease state information
1400 void create_lease_buf(u8 *rbuf, struct lease *lease)
1402 if (lease->version == 2) {
1403 struct create_lease_v2 *buf = (struct create_lease_v2 *)rbuf;
1405 memset(buf, 0, sizeof(struct create_lease_v2));
1406 memcpy(buf->lcontext.LeaseKey, lease->lease_key,
1407 SMB2_LEASE_KEY_SIZE);
1408 buf->lcontext.LeaseFlags = lease->flags;
1409 buf->lcontext.Epoch = cpu_to_le16(++lease->epoch);
1410 buf->lcontext.LeaseState = lease->state;
1411 memcpy(buf->lcontext.ParentLeaseKey, lease->parent_lease_key,
1412 SMB2_LEASE_KEY_SIZE);
1413 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1414 (struct create_lease_v2, lcontext));
1415 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1416 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1417 (struct create_lease_v2, Name));
1418 buf->ccontext.NameLength = cpu_to_le16(4);
1424 struct create_lease *buf = (struct create_lease *)rbuf;
1426 memset(buf, 0, sizeof(struct create_lease));
1427 memcpy(buf->lcontext.LeaseKey, lease->lease_key, SMB2_LEASE_KEY_SIZE);
1428 buf->lcontext.LeaseFlags = lease->flags;
1429 buf->lcontext.LeaseState = lease->state;
1430 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1431 (struct create_lease, lcontext));
1432 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1433 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1434 (struct create_lease, Name));
1435 buf->ccontext.NameLength = cpu_to_le16(4);
1444 * parse_lease_state() - parse lease context containted in file open request
1445 * @open_req: buffer containing smb2 file open(create) request
1446 * @is_dir: whether leasing file is directory
1448 * Return: oplock state, -ENOENT if create lease context not found
1450 struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir)
1452 struct create_context *cc;
1453 struct smb2_create_req *req = (struct smb2_create_req *)open_req;
1454 struct lease_ctx_info *lreq;
1456 cc = smb2_find_context_vals(req, SMB2_CREATE_REQUEST_LEASE, 4);
1457 if (IS_ERR_OR_NULL(cc))
1460 lreq = kzalloc(sizeof(struct lease_ctx_info), GFP_KERNEL);
1464 if (sizeof(struct lease_context_v2) == le32_to_cpu(cc->DataLength)) {
1465 struct create_lease_v2 *lc = (struct create_lease_v2 *)cc;
1467 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
1469 lreq->req_state = lc->lcontext.LeaseState &
1470 ~SMB2_LEASE_WRITE_CACHING_LE;
1471 lreq->is_dir = true;
1473 lreq->req_state = lc->lcontext.LeaseState;
1474 lreq->flags = lc->lcontext.LeaseFlags;
1475 lreq->epoch = lc->lcontext.Epoch;
1476 lreq->duration = lc->lcontext.LeaseDuration;
1477 memcpy(lreq->parent_lease_key, lc->lcontext.ParentLeaseKey,
1478 SMB2_LEASE_KEY_SIZE);
1481 struct create_lease *lc = (struct create_lease *)cc;
1483 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
1484 lreq->req_state = lc->lcontext.LeaseState;
1485 lreq->flags = lc->lcontext.LeaseFlags;
1486 lreq->duration = lc->lcontext.LeaseDuration;
1493 * smb2_find_context_vals() - find a particular context info in open request
1494 * @open_req: buffer containing smb2 file open(create) request
1495 * @tag: context name to search for
1496 * @tag_len: the length of tag
1498 * Return: pointer to requested context, NULL if @str context not found
1499 * or error pointer if name length is invalid.
1501 struct create_context *smb2_find_context_vals(void *open_req, const char *tag, int tag_len)
1503 struct create_context *cc;
1504 unsigned int next = 0;
1506 struct smb2_create_req *req = (struct smb2_create_req *)open_req;
1507 unsigned int remain_len, name_off, name_len, value_off, value_len,
1511 * CreateContextsOffset and CreateContextsLength are guaranteed to
1512 * be valid because of ksmbd_smb2_check_message().
1514 cc = (struct create_context *)((char *)req +
1515 le32_to_cpu(req->CreateContextsOffset));
1516 remain_len = le32_to_cpu(req->CreateContextsLength);
1518 cc = (struct create_context *)((char *)cc + next);
1519 if (remain_len < offsetof(struct create_context, Buffer))
1520 return ERR_PTR(-EINVAL);
1522 next = le32_to_cpu(cc->Next);
1523 name_off = le16_to_cpu(cc->NameOffset);
1524 name_len = le16_to_cpu(cc->NameLength);
1525 value_off = le16_to_cpu(cc->DataOffset);
1526 value_len = le32_to_cpu(cc->DataLength);
1527 cc_len = next ? next : remain_len;
1529 if ((next & 0x7) != 0 ||
1530 next > remain_len ||
1531 name_off != offsetof(struct create_context, Buffer) ||
1533 name_off + name_len > cc_len ||
1534 (value_off & 0x7) != 0 ||
1535 (value_len && value_off < name_off + (name_len < 8 ? 8 : name_len)) ||
1536 ((u64)value_off + value_len > cc_len))
1537 return ERR_PTR(-EINVAL);
1539 name = (char *)cc + name_off;
1540 if (name_len == tag_len && !memcmp(name, tag, name_len))
1544 } while (next != 0);
1550 * create_durable_rsp_buf() - create durable handle context
1551 * @cc: buffer to create durable context response
1553 void create_durable_rsp_buf(char *cc)
1555 struct create_durable_rsp *buf;
1557 buf = (struct create_durable_rsp *)cc;
1558 memset(buf, 0, sizeof(struct create_durable_rsp));
1559 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1560 (struct create_durable_rsp, Data));
1561 buf->ccontext.DataLength = cpu_to_le32(8);
1562 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1563 (struct create_durable_rsp, Name));
1564 buf->ccontext.NameLength = cpu_to_le16(4);
1565 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE is "DHnQ" */
1573 * create_durable_v2_rsp_buf() - create durable handle v2 context
1574 * @cc: buffer to create durable context response
1575 * @fp: ksmbd file pointer
1577 void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp)
1579 struct create_durable_v2_rsp *buf;
1581 buf = (struct create_durable_v2_rsp *)cc;
1582 memset(buf, 0, sizeof(struct create_durable_rsp));
1583 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1584 (struct create_durable_rsp, Data));
1585 buf->ccontext.DataLength = cpu_to_le32(8);
1586 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1587 (struct create_durable_rsp, Name));
1588 buf->ccontext.NameLength = cpu_to_le16(4);
1589 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE_V2 is "DH2Q" */
1595 buf->Timeout = cpu_to_le32(fp->durable_timeout);
1599 * create_mxac_rsp_buf() - create query maximal access context
1600 * @cc: buffer to create maximal access context response
1601 * @maximal_access: maximal access
1603 void create_mxac_rsp_buf(char *cc, int maximal_access)
1605 struct create_mxac_rsp *buf;
1607 buf = (struct create_mxac_rsp *)cc;
1608 memset(buf, 0, sizeof(struct create_mxac_rsp));
1609 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1610 (struct create_mxac_rsp, QueryStatus));
1611 buf->ccontext.DataLength = cpu_to_le32(8);
1612 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1613 (struct create_mxac_rsp, Name));
1614 buf->ccontext.NameLength = cpu_to_le16(4);
1615 /* SMB2_CREATE_QUERY_MAXIMAL_ACCESS_RESPONSE is "MxAc" */
1621 buf->QueryStatus = STATUS_SUCCESS;
1622 buf->MaximalAccess = cpu_to_le32(maximal_access);
1625 void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id)
1627 struct create_disk_id_rsp *buf;
1629 buf = (struct create_disk_id_rsp *)cc;
1630 memset(buf, 0, sizeof(struct create_disk_id_rsp));
1631 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1632 (struct create_disk_id_rsp, DiskFileId));
1633 buf->ccontext.DataLength = cpu_to_le32(32);
1634 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1635 (struct create_mxac_rsp, Name));
1636 buf->ccontext.NameLength = cpu_to_le16(4);
1637 /* SMB2_CREATE_QUERY_ON_DISK_ID_RESPONSE is "QFid" */
1643 buf->DiskFileId = cpu_to_le64(file_id);
1644 buf->VolumeId = cpu_to_le64(vol_id);
1648 * create_posix_rsp_buf() - create posix extension context
1649 * @cc: buffer to create posix on posix response
1650 * @fp: ksmbd file pointer
1652 void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp)
1654 struct create_posix_rsp *buf;
1655 struct inode *inode = file_inode(fp->filp);
1656 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
1657 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
1658 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
1660 buf = (struct create_posix_rsp *)cc;
1661 memset(buf, 0, sizeof(struct create_posix_rsp));
1662 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1663 (struct create_posix_rsp, nlink));
1665 * DataLength = nlink(4) + reparse_tag(4) + mode(4) +
1666 * domain sid(28) + unix group sid(16).
1668 buf->ccontext.DataLength = cpu_to_le32(56);
1669 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1670 (struct create_posix_rsp, Name));
1671 buf->ccontext.NameLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
1672 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
1673 buf->Name[0] = 0x93;
1674 buf->Name[1] = 0xAD;
1675 buf->Name[2] = 0x25;
1676 buf->Name[3] = 0x50;
1677 buf->Name[4] = 0x9C;
1678 buf->Name[5] = 0xB4;
1679 buf->Name[6] = 0x11;
1680 buf->Name[7] = 0xE7;
1681 buf->Name[8] = 0xB4;
1682 buf->Name[9] = 0x23;
1683 buf->Name[10] = 0x83;
1684 buf->Name[11] = 0xDE;
1685 buf->Name[12] = 0x96;
1686 buf->Name[13] = 0x8B;
1687 buf->Name[14] = 0xCD;
1688 buf->Name[15] = 0x7C;
1690 buf->nlink = cpu_to_le32(inode->i_nlink);
1691 buf->reparse_tag = cpu_to_le32(fp->volatile_id);
1692 buf->mode = cpu_to_le32(inode->i_mode & 0777);
1694 * SidBuffer(44) contain two sids(Domain sid(28), UNIX group sid(16)).
1695 * Domain sid(28) = revision(1) + num_subauth(1) + authority(6) +
1696 * sub_auth(4 * 4(num_subauth)) + RID(4).
1697 * UNIX group id(16) = revision(1) + num_subauth(1) + authority(6) +
1698 * sub_auth(4 * 1(num_subauth)) + RID(4).
1700 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
1701 SIDOWNER, (struct smb_sid *)&buf->SidBuffer[0]);
1702 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
1703 SIDUNIX_GROUP, (struct smb_sid *)&buf->SidBuffer[28]);
1707 * Find lease object(opinfo) for given lease key/fid from lease
1708 * break/file close path.
1711 * lookup_lease_in_table() - find a matching lease info object
1712 * @conn: connection instance
1713 * @lease_key: lease key to be searched for
1715 * Return: opinfo if found matching opinfo, otherwise NULL
1717 struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,
1720 struct oplock_info *opinfo = NULL, *ret_op = NULL;
1721 struct lease_table *lt;
1724 read_lock(&lease_list_lock);
1725 list_for_each_entry(lt, &lease_table_list, l_entry) {
1726 if (!memcmp(lt->client_guid, conn->ClientGUID,
1727 SMB2_CLIENT_GUID_SIZE))
1731 read_unlock(&lease_list_lock);
1736 list_for_each_entry_rcu(opinfo, <->lease_list, lease_entry) {
1737 if (!atomic_inc_not_zero(&opinfo->refcount))
1740 if (!opinfo->op_state || opinfo->op_state == OPLOCK_CLOSING)
1742 if (!(opinfo->o_lease->state &
1743 (SMB2_LEASE_HANDLE_CACHING_LE |
1744 SMB2_LEASE_WRITE_CACHING_LE)))
1746 ret = compare_guid_key(opinfo, conn->ClientGUID,
1749 ksmbd_debug(OPLOCK, "found opinfo\n");
1760 read_unlock(&lease_list_lock);