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 memcpy(lease->parent_lease_key, lctx->parent_lease_key, SMB2_LEASE_KEY_SIZE);
106 lease->version = lctx->version;
108 INIT_LIST_HEAD(&opinfo->lease_entry);
109 opinfo->o_lease = lease;
114 static void free_lease(struct oplock_info *opinfo)
118 lease = opinfo->o_lease;
122 static void free_opinfo(struct oplock_info *opinfo)
124 if (opinfo->is_lease)
129 static inline void opinfo_free_rcu(struct rcu_head *rcu_head)
131 struct oplock_info *opinfo;
133 opinfo = container_of(rcu_head, struct oplock_info, rcu_head);
137 struct oplock_info *opinfo_get(struct ksmbd_file *fp)
139 struct oplock_info *opinfo;
142 opinfo = rcu_dereference(fp->f_opinfo);
143 if (opinfo && !atomic_inc_not_zero(&opinfo->refcount))
150 static struct oplock_info *opinfo_get_list(struct ksmbd_inode *ci)
152 struct oplock_info *opinfo;
154 if (list_empty(&ci->m_op_list))
158 opinfo = list_first_or_null_rcu(&ci->m_op_list, struct oplock_info,
161 if (!atomic_inc_not_zero(&opinfo->refcount))
164 atomic_inc(&opinfo->conn->r_count);
165 if (ksmbd_conn_releasing(opinfo->conn)) {
166 atomic_dec(&opinfo->conn->r_count);
167 atomic_dec(&opinfo->refcount);
178 static void opinfo_conn_put(struct oplock_info *opinfo)
180 struct ksmbd_conn *conn;
187 * Checking waitqueue to dropping pending requests on
188 * disconnection. waitqueue_active is safe because it
189 * uses atomic operation for condition.
191 if (!atomic_dec_return(&conn->r_count) && waitqueue_active(&conn->r_count_q))
192 wake_up(&conn->r_count_q);
196 void opinfo_put(struct oplock_info *opinfo)
198 if (!atomic_dec_and_test(&opinfo->refcount))
201 call_rcu(&opinfo->rcu_head, opinfo_free_rcu);
204 static void opinfo_add(struct oplock_info *opinfo)
206 struct ksmbd_inode *ci = opinfo->o_fp->f_ci;
208 write_lock(&ci->m_lock);
209 list_add_rcu(&opinfo->op_entry, &ci->m_op_list);
210 write_unlock(&ci->m_lock);
213 static void opinfo_del(struct oplock_info *opinfo)
215 struct ksmbd_inode *ci = opinfo->o_fp->f_ci;
217 if (opinfo->is_lease) {
218 write_lock(&lease_list_lock);
219 lease_del_list(opinfo);
220 write_unlock(&lease_list_lock);
222 write_lock(&ci->m_lock);
223 list_del_rcu(&opinfo->op_entry);
224 write_unlock(&ci->m_lock);
227 static unsigned long opinfo_count(struct ksmbd_file *fp)
229 if (ksmbd_stream_fd(fp))
230 return atomic_read(&fp->f_ci->sop_count);
232 return atomic_read(&fp->f_ci->op_count);
235 static void opinfo_count_inc(struct ksmbd_file *fp)
237 if (ksmbd_stream_fd(fp))
238 return atomic_inc(&fp->f_ci->sop_count);
240 return atomic_inc(&fp->f_ci->op_count);
243 static void opinfo_count_dec(struct ksmbd_file *fp)
245 if (ksmbd_stream_fd(fp))
246 return atomic_dec(&fp->f_ci->sop_count);
248 return atomic_dec(&fp->f_ci->op_count);
252 * opinfo_write_to_read() - convert a write oplock to read oplock
253 * @opinfo: current oplock info
255 * Return: 0 on success, otherwise -EINVAL
257 int opinfo_write_to_read(struct oplock_info *opinfo)
259 struct lease *lease = opinfo->o_lease;
261 if (!(opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
262 opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) {
263 pr_err("bad oplock(0x%x)\n", opinfo->level);
264 if (opinfo->is_lease)
265 pr_err("lease state(0x%x)\n", lease->state);
268 opinfo->level = SMB2_OPLOCK_LEVEL_II;
270 if (opinfo->is_lease)
271 lease->state = lease->new_state;
276 * opinfo_read_handle_to_read() - convert a read/handle oplock to read oplock
277 * @opinfo: current oplock info
279 * Return: 0 on success, otherwise -EINVAL
281 int opinfo_read_handle_to_read(struct oplock_info *opinfo)
283 struct lease *lease = opinfo->o_lease;
285 lease->state = lease->new_state;
286 opinfo->level = SMB2_OPLOCK_LEVEL_II;
291 * opinfo_write_to_none() - convert a write oplock to none
292 * @opinfo: current oplock info
294 * Return: 0 on success, otherwise -EINVAL
296 int opinfo_write_to_none(struct oplock_info *opinfo)
298 struct lease *lease = opinfo->o_lease;
300 if (!(opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
301 opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) {
302 pr_err("bad oplock(0x%x)\n", opinfo->level);
303 if (opinfo->is_lease)
304 pr_err("lease state(0x%x)\n", lease->state);
307 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
308 if (opinfo->is_lease)
309 lease->state = lease->new_state;
314 * opinfo_read_to_none() - convert a write read to none
315 * @opinfo: current oplock info
317 * Return: 0 on success, otherwise -EINVAL
319 int opinfo_read_to_none(struct oplock_info *opinfo)
321 struct lease *lease = opinfo->o_lease;
323 if (opinfo->level != SMB2_OPLOCK_LEVEL_II) {
324 pr_err("bad oplock(0x%x)\n", opinfo->level);
325 if (opinfo->is_lease)
326 pr_err("lease state(0x%x)\n", lease->state);
329 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
330 if (opinfo->is_lease)
331 lease->state = lease->new_state;
336 * lease_read_to_write() - upgrade lease state from read to write
337 * @opinfo: current lease info
339 * Return: 0 on success, otherwise -EINVAL
341 int lease_read_to_write(struct oplock_info *opinfo)
343 struct lease *lease = opinfo->o_lease;
345 if (!(lease->state & SMB2_LEASE_READ_CACHING_LE)) {
346 ksmbd_debug(OPLOCK, "bad lease state(0x%x)\n", lease->state);
350 lease->new_state = SMB2_LEASE_NONE_LE;
351 lease->state |= SMB2_LEASE_WRITE_CACHING_LE;
352 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
353 opinfo->level = SMB2_OPLOCK_LEVEL_BATCH;
355 opinfo->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
360 * lease_none_upgrade() - upgrade lease state from none
361 * @opinfo: current lease info
362 * @new_state: new lease state
364 * Return: 0 on success, otherwise -EINVAL
366 static int lease_none_upgrade(struct oplock_info *opinfo, __le32 new_state)
368 struct lease *lease = opinfo->o_lease;
370 if (!(lease->state == SMB2_LEASE_NONE_LE)) {
371 ksmbd_debug(OPLOCK, "bad lease state(0x%x)\n", lease->state);
375 lease->new_state = SMB2_LEASE_NONE_LE;
376 lease->state = new_state;
377 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
378 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
379 opinfo->level = SMB2_OPLOCK_LEVEL_BATCH;
381 opinfo->level = SMB2_OPLOCK_LEVEL_II;
382 else if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
383 opinfo->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
384 else if (lease->state & SMB2_LEASE_READ_CACHING_LE)
385 opinfo->level = SMB2_OPLOCK_LEVEL_II;
391 * close_id_del_oplock() - release oplock object at file close time
392 * @fp: ksmbd file pointer
394 void close_id_del_oplock(struct ksmbd_file *fp)
396 struct oplock_info *opinfo;
398 if (S_ISDIR(file_inode(fp->filp)->i_mode))
401 opinfo = opinfo_get(fp);
407 rcu_assign_pointer(fp->f_opinfo, NULL);
408 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
409 opinfo->op_state = OPLOCK_CLOSING;
410 wake_up_interruptible_all(&opinfo->oplock_q);
411 if (opinfo->is_lease) {
412 atomic_set(&opinfo->breaking_cnt, 0);
413 wake_up_interruptible_all(&opinfo->oplock_brk);
417 opinfo_count_dec(fp);
418 atomic_dec(&opinfo->refcount);
423 * grant_write_oplock() - grant exclusive/batch oplock or write lease
424 * @opinfo_new: new oplock info object
425 * @req_oplock: request oplock
426 * @lctx: lease context information
430 static void grant_write_oplock(struct oplock_info *opinfo_new, int req_oplock,
431 struct lease_ctx_info *lctx)
433 struct lease *lease = opinfo_new->o_lease;
435 if (req_oplock == SMB2_OPLOCK_LEVEL_BATCH)
436 opinfo_new->level = SMB2_OPLOCK_LEVEL_BATCH;
438 opinfo_new->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
441 lease->state = lctx->req_state;
442 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
447 * grant_read_oplock() - grant level2 oplock or read lease
448 * @opinfo_new: new oplock info object
449 * @lctx: lease context information
453 static void grant_read_oplock(struct oplock_info *opinfo_new,
454 struct lease_ctx_info *lctx)
456 struct lease *lease = opinfo_new->o_lease;
458 opinfo_new->level = SMB2_OPLOCK_LEVEL_II;
461 lease->state = SMB2_LEASE_READ_CACHING_LE;
462 if (lctx->req_state & SMB2_LEASE_HANDLE_CACHING_LE)
463 lease->state |= SMB2_LEASE_HANDLE_CACHING_LE;
464 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
469 * grant_none_oplock() - grant none oplock or none lease
470 * @opinfo_new: new oplock info object
471 * @lctx: lease context information
475 static void grant_none_oplock(struct oplock_info *opinfo_new,
476 struct lease_ctx_info *lctx)
478 struct lease *lease = opinfo_new->o_lease;
480 opinfo_new->level = SMB2_OPLOCK_LEVEL_NONE;
484 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE);
488 static inline int compare_guid_key(struct oplock_info *opinfo,
489 const char *guid1, const char *key1)
491 const char *guid2, *key2;
493 guid2 = opinfo->conn->ClientGUID;
494 key2 = opinfo->o_lease->lease_key;
495 if (!memcmp(guid1, guid2, SMB2_CLIENT_GUID_SIZE) &&
496 !memcmp(key1, key2, SMB2_LEASE_KEY_SIZE))
503 * same_client_has_lease() - check whether current lease request is
504 * from lease owner of file
505 * @ci: master file pointer
506 * @client_guid: Client GUID
507 * @lctx: lease context information
509 * Return: oplock(lease) object on success, otherwise NULL
511 static struct oplock_info *same_client_has_lease(struct ksmbd_inode *ci,
513 struct lease_ctx_info *lctx)
517 struct oplock_info *opinfo;
518 struct oplock_info *m_opinfo = NULL;
524 * Compare lease key and client_guid to know request from same owner
527 read_lock(&ci->m_lock);
528 list_for_each_entry(opinfo, &ci->m_op_list, op_entry) {
529 if (!opinfo->is_lease)
531 read_unlock(&ci->m_lock);
532 lease = opinfo->o_lease;
534 ret = compare_guid_key(opinfo, client_guid, lctx->lease_key);
537 /* skip upgrading lease about breaking lease */
538 if (atomic_read(&opinfo->breaking_cnt)) {
539 read_lock(&ci->m_lock);
543 /* upgrading lease */
544 if ((atomic_read(&ci->op_count) +
545 atomic_read(&ci->sop_count)) == 1) {
547 (lctx->req_state & lease->state)) {
548 lease->state |= lctx->req_state;
549 if (lctx->req_state &
550 SMB2_LEASE_WRITE_CACHING_LE)
551 lease_read_to_write(opinfo);
553 } else if ((atomic_read(&ci->op_count) +
554 atomic_read(&ci->sop_count)) > 1) {
555 if (lctx->req_state ==
556 (SMB2_LEASE_READ_CACHING_LE |
557 SMB2_LEASE_HANDLE_CACHING_LE))
558 lease->state = lctx->req_state;
561 if (lctx->req_state && lease->state ==
563 lease_none_upgrade(opinfo, lctx->req_state);
565 read_lock(&ci->m_lock);
567 read_unlock(&ci->m_lock);
572 static void wait_for_break_ack(struct oplock_info *opinfo)
576 rc = wait_event_interruptible_timeout(opinfo->oplock_q,
577 opinfo->op_state == OPLOCK_STATE_NONE ||
578 opinfo->op_state == OPLOCK_CLOSING,
581 /* is this a timeout ? */
583 if (opinfo->is_lease)
584 opinfo->o_lease->state = SMB2_LEASE_NONE_LE;
585 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
586 opinfo->op_state = OPLOCK_STATE_NONE;
590 static void wake_up_oplock_break(struct oplock_info *opinfo)
592 clear_bit_unlock(0, &opinfo->pending_break);
593 /* memory barrier is needed for wake_up_bit() */
594 smp_mb__after_atomic();
595 wake_up_bit(&opinfo->pending_break, 0);
598 static int oplock_break_pending(struct oplock_info *opinfo, int req_op_level)
600 while (test_and_set_bit(0, &opinfo->pending_break)) {
601 wait_on_bit(&opinfo->pending_break, 0, TASK_UNINTERRUPTIBLE);
603 /* Not immediately break to none. */
604 opinfo->open_trunc = 0;
606 if (opinfo->op_state == OPLOCK_CLOSING)
608 else if (!opinfo->is_lease && opinfo->level <= req_op_level)
612 if (!opinfo->is_lease && opinfo->level <= req_op_level) {
613 wake_up_oplock_break(opinfo);
620 * __smb2_oplock_break_noti() - send smb2 oplock break cmd from conn
622 * @wk: smb work object
624 * There are two ways this function can be called. 1- while file open we break
625 * from exclusive/batch lock to levelII oplock and 2- while file write/truncate
626 * we break from levelII oplock no oplock.
627 * work->request_buf contains oplock_info.
629 static void __smb2_oplock_break_noti(struct work_struct *wk)
631 struct smb2_oplock_break *rsp = NULL;
632 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work);
633 struct oplock_break_info *br_info = work->request_buf;
634 struct smb2_hdr *rsp_hdr;
635 struct ksmbd_file *fp;
637 fp = ksmbd_lookup_durable_fd(br_info->fid);
641 if (allocate_interim_rsp_buf(work)) {
642 pr_err("smb2_allocate_rsp_buf failed! ");
643 ksmbd_fd_put(work, fp);
647 rsp_hdr = smb2_get_msg(work->response_buf);
648 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
649 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
650 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
651 rsp_hdr->CreditRequest = cpu_to_le16(0);
652 rsp_hdr->Command = SMB2_OPLOCK_BREAK;
653 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
654 rsp_hdr->NextCommand = 0;
655 rsp_hdr->MessageId = cpu_to_le64(-1);
656 rsp_hdr->Id.SyncId.ProcessId = 0;
657 rsp_hdr->Id.SyncId.TreeId = 0;
658 rsp_hdr->SessionId = 0;
659 memset(rsp_hdr->Signature, 0, 16);
661 rsp = smb2_get_msg(work->response_buf);
663 rsp->StructureSize = cpu_to_le16(24);
664 if (!br_info->open_trunc &&
665 (br_info->level == SMB2_OPLOCK_LEVEL_BATCH ||
666 br_info->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
667 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_II;
669 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
672 rsp->PersistentFid = fp->persistent_id;
673 rsp->VolatileFid = fp->volatile_id;
675 ksmbd_fd_put(work, fp);
676 if (ksmbd_iov_pin_rsp(work, (void *)rsp,
677 sizeof(struct smb2_oplock_break)))
681 "sending oplock break v_id %llu p_id = %llu lock level = %d\n",
682 rsp->VolatileFid, rsp->PersistentFid, rsp->OplockLevel);
684 ksmbd_conn_write(work);
687 ksmbd_free_work_struct(work);
691 * smb2_oplock_break_noti() - send smb2 exclusive/batch to level2 oplock
692 * break command from server to client
693 * @opinfo: oplock info object
695 * Return: 0 on success, otherwise error
697 static int smb2_oplock_break_noti(struct oplock_info *opinfo)
699 struct ksmbd_conn *conn = opinfo->conn;
700 struct oplock_break_info *br_info;
702 struct ksmbd_work *work = ksmbd_alloc_work_struct();
707 br_info = kmalloc(sizeof(struct oplock_break_info), GFP_KERNEL);
709 ksmbd_free_work_struct(work);
713 br_info->level = opinfo->level;
714 br_info->fid = opinfo->fid;
715 br_info->open_trunc = opinfo->open_trunc;
717 work->request_buf = (char *)br_info;
719 work->sess = opinfo->sess;
721 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
722 INIT_WORK(&work->work, __smb2_oplock_break_noti);
723 ksmbd_queue_work(work);
725 wait_for_break_ack(opinfo);
727 __smb2_oplock_break_noti(&work->work);
728 if (opinfo->level == SMB2_OPLOCK_LEVEL_II)
729 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
735 * __smb2_lease_break_noti() - send lease break command from server
737 * @wk: smb work object
739 static void __smb2_lease_break_noti(struct work_struct *wk)
741 struct smb2_lease_break *rsp = NULL;
742 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work);
743 struct lease_break_info *br_info = work->request_buf;
744 struct smb2_hdr *rsp_hdr;
746 if (allocate_interim_rsp_buf(work)) {
747 ksmbd_debug(OPLOCK, "smb2_allocate_rsp_buf failed! ");
751 rsp_hdr = smb2_get_msg(work->response_buf);
752 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
753 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
754 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
755 rsp_hdr->CreditRequest = cpu_to_le16(0);
756 rsp_hdr->Command = SMB2_OPLOCK_BREAK;
757 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
758 rsp_hdr->NextCommand = 0;
759 rsp_hdr->MessageId = cpu_to_le64(-1);
760 rsp_hdr->Id.SyncId.ProcessId = 0;
761 rsp_hdr->Id.SyncId.TreeId = 0;
762 rsp_hdr->SessionId = 0;
763 memset(rsp_hdr->Signature, 0, 16);
765 rsp = smb2_get_msg(work->response_buf);
766 rsp->StructureSize = cpu_to_le16(44);
767 rsp->Epoch = br_info->epoch;
770 if (br_info->curr_state & (SMB2_LEASE_WRITE_CACHING_LE |
771 SMB2_LEASE_HANDLE_CACHING_LE))
772 rsp->Flags = SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED;
774 memcpy(rsp->LeaseKey, br_info->lease_key, SMB2_LEASE_KEY_SIZE);
775 rsp->CurrentLeaseState = br_info->curr_state;
776 rsp->NewLeaseState = br_info->new_state;
777 rsp->BreakReason = 0;
778 rsp->AccessMaskHint = 0;
779 rsp->ShareMaskHint = 0;
781 if (ksmbd_iov_pin_rsp(work, (void *)rsp,
782 sizeof(struct smb2_lease_break)))
785 ksmbd_conn_write(work);
788 ksmbd_free_work_struct(work);
792 * smb2_lease_break_noti() - break lease when a new client request
794 * @opinfo: conains lease state information
796 * Return: 0 on success, otherwise error
798 static int smb2_lease_break_noti(struct oplock_info *opinfo)
800 struct ksmbd_conn *conn = opinfo->conn;
801 struct list_head *tmp, *t;
802 struct ksmbd_work *work;
803 struct lease_break_info *br_info;
804 struct lease *lease = opinfo->o_lease;
806 work = ksmbd_alloc_work_struct();
810 br_info = kmalloc(sizeof(struct lease_break_info), GFP_KERNEL);
812 ksmbd_free_work_struct(work);
816 br_info->curr_state = lease->state;
817 br_info->new_state = lease->new_state;
818 if (lease->version == 2)
819 br_info->epoch = cpu_to_le16(++lease->epoch);
822 memcpy(br_info->lease_key, lease->lease_key, SMB2_LEASE_KEY_SIZE);
824 work->request_buf = (char *)br_info;
826 work->sess = opinfo->sess;
828 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
829 list_for_each_safe(tmp, t, &opinfo->interim_list) {
830 struct ksmbd_work *in_work;
832 in_work = list_entry(tmp, struct ksmbd_work,
834 setup_async_work(in_work, NULL, NULL);
835 smb2_send_interim_resp(in_work, STATUS_PENDING);
836 list_del_init(&in_work->interim_entry);
837 release_async_work(in_work);
839 INIT_WORK(&work->work, __smb2_lease_break_noti);
840 ksmbd_queue_work(work);
841 wait_for_break_ack(opinfo);
843 __smb2_lease_break_noti(&work->work);
844 if (opinfo->o_lease->new_state == SMB2_LEASE_NONE_LE) {
845 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
846 opinfo->o_lease->state = SMB2_LEASE_NONE_LE;
852 static void wait_lease_breaking(struct oplock_info *opinfo)
854 if (!opinfo->is_lease)
857 wake_up_interruptible_all(&opinfo->oplock_brk);
858 if (atomic_read(&opinfo->breaking_cnt)) {
861 ret = wait_event_interruptible_timeout(opinfo->oplock_brk,
862 atomic_read(&opinfo->breaking_cnt) == 0,
865 atomic_set(&opinfo->breaking_cnt, 0);
869 static int oplock_break(struct oplock_info *brk_opinfo, int req_op_level)
873 /* Need to break exclusive/batch oplock, write lease or overwrite_if */
875 "request to send oplock(level : 0x%x) break notification\n",
878 if (brk_opinfo->is_lease) {
879 struct lease *lease = brk_opinfo->o_lease;
881 atomic_inc(&brk_opinfo->breaking_cnt);
883 err = oplock_break_pending(brk_opinfo, req_op_level);
885 return err < 0 ? err : 0;
887 if (brk_opinfo->open_trunc) {
889 * Create overwrite break trigger the lease break to
892 lease->new_state = SMB2_LEASE_NONE_LE;
894 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) {
895 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
897 SMB2_LEASE_READ_CACHING_LE |
898 SMB2_LEASE_HANDLE_CACHING_LE;
901 SMB2_LEASE_READ_CACHING_LE;
903 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
905 SMB2_LEASE_READ_CACHING_LE;
907 lease->new_state = SMB2_LEASE_NONE_LE;
911 if (lease->state & (SMB2_LEASE_WRITE_CACHING_LE |
912 SMB2_LEASE_HANDLE_CACHING_LE))
913 brk_opinfo->op_state = OPLOCK_ACK_WAIT;
915 atomic_dec(&brk_opinfo->breaking_cnt);
917 err = oplock_break_pending(brk_opinfo, req_op_level);
919 return err < 0 ? err : 0;
921 if (brk_opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
922 brk_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
923 brk_opinfo->op_state = OPLOCK_ACK_WAIT;
926 if (brk_opinfo->is_lease)
927 err = smb2_lease_break_noti(brk_opinfo);
929 err = smb2_oplock_break_noti(brk_opinfo);
931 ksmbd_debug(OPLOCK, "oplock granted = %d\n", brk_opinfo->level);
932 if (brk_opinfo->op_state == OPLOCK_CLOSING)
934 wake_up_oplock_break(brk_opinfo);
936 wait_lease_breaking(brk_opinfo);
941 void destroy_lease_table(struct ksmbd_conn *conn)
943 struct lease_table *lb, *lbtmp;
944 struct oplock_info *opinfo;
946 write_lock(&lease_list_lock);
947 if (list_empty(&lease_table_list)) {
948 write_unlock(&lease_list_lock);
952 list_for_each_entry_safe(lb, lbtmp, &lease_table_list, l_entry) {
953 if (conn && memcmp(lb->client_guid, conn->ClientGUID,
954 SMB2_CLIENT_GUID_SIZE))
958 list_for_each_entry_rcu(opinfo, &lb->lease_list,
961 lease_del_list(opinfo);
965 list_del(&lb->l_entry);
968 write_unlock(&lease_list_lock);
971 int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
972 struct lease_ctx_info *lctx)
974 struct oplock_info *opinfo;
976 struct lease_table *lb;
981 read_lock(&lease_list_lock);
982 if (list_empty(&lease_table_list)) {
983 read_unlock(&lease_list_lock);
987 list_for_each_entry(lb, &lease_table_list, l_entry) {
988 if (!memcmp(lb->client_guid, sess->ClientGUID,
989 SMB2_CLIENT_GUID_SIZE))
992 read_unlock(&lease_list_lock);
998 list_for_each_entry_rcu(opinfo, &lb->lease_list, lease_entry) {
999 if (!atomic_inc_not_zero(&opinfo->refcount))
1002 if (opinfo->o_fp->f_ci == ci)
1004 err = compare_guid_key(opinfo, sess->ClientGUID,
1009 "found same lease key is already used in other files\n");
1020 read_unlock(&lease_list_lock);
1024 static void copy_lease(struct oplock_info *op1, struct oplock_info *op2)
1026 struct lease *lease1 = op1->o_lease;
1027 struct lease *lease2 = op2->o_lease;
1029 op2->level = op1->level;
1030 lease2->state = lease1->state;
1031 memcpy(lease2->lease_key, lease1->lease_key,
1032 SMB2_LEASE_KEY_SIZE);
1033 lease2->duration = lease1->duration;
1034 lease2->flags = lease1->flags;
1037 static int add_lease_global_list(struct oplock_info *opinfo)
1039 struct lease_table *lb;
1041 read_lock(&lease_list_lock);
1042 list_for_each_entry(lb, &lease_table_list, l_entry) {
1043 if (!memcmp(lb->client_guid, opinfo->conn->ClientGUID,
1044 SMB2_CLIENT_GUID_SIZE)) {
1045 opinfo->o_lease->l_lb = lb;
1046 lease_add_list(opinfo);
1047 read_unlock(&lease_list_lock);
1051 read_unlock(&lease_list_lock);
1053 lb = kmalloc(sizeof(struct lease_table), GFP_KERNEL);
1057 memcpy(lb->client_guid, opinfo->conn->ClientGUID,
1058 SMB2_CLIENT_GUID_SIZE);
1059 INIT_LIST_HEAD(&lb->lease_list);
1060 spin_lock_init(&lb->lb_lock);
1061 opinfo->o_lease->l_lb = lb;
1062 lease_add_list(opinfo);
1067 static void set_oplock_level(struct oplock_info *opinfo, int level,
1068 struct lease_ctx_info *lctx)
1071 case SMB2_OPLOCK_LEVEL_BATCH:
1072 case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
1073 grant_write_oplock(opinfo, level, lctx);
1075 case SMB2_OPLOCK_LEVEL_II:
1076 grant_read_oplock(opinfo, lctx);
1079 grant_none_oplock(opinfo, lctx);
1085 * smb_grant_oplock() - handle oplock/lease request on file open
1087 * @req_op_level: oplock level
1088 * @pid: id of open file
1089 * @fp: ksmbd file pointer
1090 * @tid: Tree id of connection
1091 * @lctx: lease context information on file open
1092 * @share_ret: share mode
1094 * Return: 0 on success, otherwise error
1096 int smb_grant_oplock(struct ksmbd_work *work, int req_op_level, u64 pid,
1097 struct ksmbd_file *fp, __u16 tid,
1098 struct lease_ctx_info *lctx, int share_ret)
1100 struct ksmbd_session *sess = work->sess;
1102 struct oplock_info *opinfo = NULL, *prev_opinfo = NULL;
1103 struct ksmbd_inode *ci = fp->f_ci;
1104 bool prev_op_has_lease;
1105 __le32 prev_op_state = 0;
1107 /* not support directory lease */
1108 if (S_ISDIR(file_inode(fp->filp)->i_mode))
1111 opinfo = alloc_opinfo(work, pid, tid);
1116 err = alloc_lease(opinfo, lctx);
1119 opinfo->is_lease = 1;
1122 /* ci does not have any oplock */
1123 if (!opinfo_count(fp))
1126 /* grant none-oplock if second open is trunc */
1127 if (fp->attrib_only && fp->cdoption != FILE_OVERWRITE_IF_LE &&
1128 fp->cdoption != FILE_OVERWRITE_LE &&
1129 fp->cdoption != FILE_SUPERSEDE_LE) {
1130 req_op_level = SMB2_OPLOCK_LEVEL_NONE;
1135 struct oplock_info *m_opinfo;
1137 /* is lease already granted ? */
1138 m_opinfo = same_client_has_lease(ci, sess->ClientGUID,
1141 copy_lease(m_opinfo, opinfo);
1142 if (atomic_read(&m_opinfo->breaking_cnt))
1143 opinfo->o_lease->flags =
1144 SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE;
1148 prev_opinfo = opinfo_get_list(ci);
1150 (prev_opinfo->level == SMB2_OPLOCK_LEVEL_NONE && lctx)) {
1151 opinfo_conn_put(prev_opinfo);
1154 prev_op_has_lease = prev_opinfo->is_lease;
1155 if (prev_op_has_lease)
1156 prev_op_state = prev_opinfo->o_lease->state;
1158 if (share_ret < 0 &&
1159 prev_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1161 opinfo_conn_put(prev_opinfo);
1165 if (prev_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH &&
1166 prev_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1167 opinfo_conn_put(prev_opinfo);
1168 goto op_break_not_needed;
1171 list_add(&work->interim_entry, &prev_opinfo->interim_list);
1172 err = oplock_break(prev_opinfo, SMB2_OPLOCK_LEVEL_II);
1173 opinfo_conn_put(prev_opinfo);
1176 /* Check all oplock was freed by close */
1180 op_break_not_needed:
1181 if (share_ret < 0) {
1186 if (req_op_level != SMB2_OPLOCK_LEVEL_NONE)
1187 req_op_level = SMB2_OPLOCK_LEVEL_II;
1189 /* grant fixed oplock on stacked locking between lease and oplock */
1190 if (prev_op_has_lease && !lctx)
1191 if (prev_op_state & SMB2_LEASE_HANDLE_CACHING_LE)
1192 req_op_level = SMB2_OPLOCK_LEVEL_NONE;
1194 if (!prev_op_has_lease && lctx) {
1195 req_op_level = SMB2_OPLOCK_LEVEL_II;
1196 lctx->req_state = SMB2_LEASE_READ_CACHING_LE;
1200 set_oplock_level(opinfo, req_op_level, lctx);
1203 rcu_assign_pointer(fp->f_opinfo, opinfo);
1206 opinfo_count_inc(fp);
1208 if (opinfo->is_lease) {
1209 err = add_lease_global_list(opinfo);
1216 free_opinfo(opinfo);
1221 * smb_break_all_write_oplock() - break batch/exclusive oplock to level2
1223 * @fp: ksmbd file pointer
1224 * @is_trunc: truncate on open
1226 static void smb_break_all_write_oplock(struct ksmbd_work *work,
1227 struct ksmbd_file *fp, int is_trunc)
1229 struct oplock_info *brk_opinfo;
1231 brk_opinfo = opinfo_get_list(fp->f_ci);
1234 if (brk_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH &&
1235 brk_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1236 opinfo_conn_put(brk_opinfo);
1240 brk_opinfo->open_trunc = is_trunc;
1241 list_add(&work->interim_entry, &brk_opinfo->interim_list);
1242 oplock_break(brk_opinfo, SMB2_OPLOCK_LEVEL_II);
1243 opinfo_conn_put(brk_opinfo);
1247 * smb_break_all_levII_oplock() - send level2 oplock or read lease break command
1248 * from server to client
1250 * @fp: ksmbd file pointer
1251 * @is_trunc: truncate on open
1253 void smb_break_all_levII_oplock(struct ksmbd_work *work, struct ksmbd_file *fp,
1256 struct oplock_info *op, *brk_op;
1257 struct ksmbd_inode *ci;
1258 struct ksmbd_conn *conn = work->conn;
1260 if (!test_share_config_flag(work->tcon->share_conf,
1261 KSMBD_SHARE_FLAG_OPLOCKS))
1265 op = opinfo_get(fp);
1268 list_for_each_entry_rcu(brk_op, &ci->m_op_list, op_entry) {
1269 if (!atomic_inc_not_zero(&brk_op->refcount))
1272 atomic_inc(&brk_op->conn->r_count);
1273 if (ksmbd_conn_releasing(brk_op->conn)) {
1274 atomic_dec(&brk_op->conn->r_count);
1279 if (brk_op->is_lease && (brk_op->o_lease->state &
1280 (~(SMB2_LEASE_READ_CACHING_LE |
1281 SMB2_LEASE_HANDLE_CACHING_LE)))) {
1282 ksmbd_debug(OPLOCK, "unexpected lease state(0x%x)\n",
1283 brk_op->o_lease->state);
1285 } else if (brk_op->level !=
1286 SMB2_OPLOCK_LEVEL_II) {
1287 ksmbd_debug(OPLOCK, "unexpected oplock(0x%x)\n",
1292 /* Skip oplock being break to none */
1293 if (brk_op->is_lease &&
1294 brk_op->o_lease->new_state == SMB2_LEASE_NONE_LE &&
1295 atomic_read(&brk_op->breaking_cnt))
1298 if (op && op->is_lease && brk_op->is_lease &&
1299 !memcmp(conn->ClientGUID, brk_op->conn->ClientGUID,
1300 SMB2_CLIENT_GUID_SIZE) &&
1301 !memcmp(op->o_lease->lease_key, brk_op->o_lease->lease_key,
1302 SMB2_LEASE_KEY_SIZE))
1304 brk_op->open_trunc = is_trunc;
1305 oplock_break(brk_op, SMB2_OPLOCK_LEVEL_NONE);
1307 opinfo_conn_put(brk_op);
1317 * smb_break_all_oplock() - break both batch/exclusive and level2 oplock
1319 * @fp: ksmbd file pointer
1321 void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp)
1323 if (!test_share_config_flag(work->tcon->share_conf,
1324 KSMBD_SHARE_FLAG_OPLOCKS))
1327 smb_break_all_write_oplock(work, fp, 1);
1328 smb_break_all_levII_oplock(work, fp, 1);
1332 * smb2_map_lease_to_oplock() - map lease state to corresponding oplock type
1333 * @lease_state: lease type
1335 * Return: 0 if no mapping, otherwise corresponding oplock type
1337 __u8 smb2_map_lease_to_oplock(__le32 lease_state)
1339 if (lease_state == (SMB2_LEASE_HANDLE_CACHING_LE |
1340 SMB2_LEASE_READ_CACHING_LE |
1341 SMB2_LEASE_WRITE_CACHING_LE)) {
1342 return SMB2_OPLOCK_LEVEL_BATCH;
1343 } else if (lease_state != SMB2_LEASE_WRITE_CACHING_LE &&
1344 lease_state & SMB2_LEASE_WRITE_CACHING_LE) {
1345 if (!(lease_state & SMB2_LEASE_HANDLE_CACHING_LE))
1346 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
1347 } else if (lease_state & SMB2_LEASE_READ_CACHING_LE) {
1348 return SMB2_OPLOCK_LEVEL_II;
1354 * create_lease_buf() - create lease context for open cmd response
1355 * @rbuf: buffer to create lease context response
1356 * @lease: buffer to stored parsed lease state information
1358 void create_lease_buf(u8 *rbuf, struct lease *lease)
1360 if (lease->version == 2) {
1361 struct create_lease_v2 *buf = (struct create_lease_v2 *)rbuf;
1363 memset(buf, 0, sizeof(struct create_lease_v2));
1364 memcpy(buf->lcontext.LeaseKey, lease->lease_key,
1365 SMB2_LEASE_KEY_SIZE);
1366 buf->lcontext.LeaseFlags = lease->flags;
1367 buf->lcontext.LeaseState = lease->state;
1368 memcpy(buf->lcontext.ParentLeaseKey, lease->parent_lease_key,
1369 SMB2_LEASE_KEY_SIZE);
1370 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1371 (struct create_lease_v2, lcontext));
1372 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1373 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1374 (struct create_lease_v2, Name));
1375 buf->ccontext.NameLength = cpu_to_le16(4);
1381 struct create_lease *buf = (struct create_lease *)rbuf;
1383 memset(buf, 0, sizeof(struct create_lease));
1384 memcpy(buf->lcontext.LeaseKey, lease->lease_key, SMB2_LEASE_KEY_SIZE);
1385 buf->lcontext.LeaseFlags = lease->flags;
1386 buf->lcontext.LeaseState = lease->state;
1387 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1388 (struct create_lease, lcontext));
1389 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1390 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1391 (struct create_lease, Name));
1392 buf->ccontext.NameLength = cpu_to_le16(4);
1401 * parse_lease_state() - parse lease context containted in file open request
1402 * @open_req: buffer containing smb2 file open(create) request
1404 * Return: oplock state, -ENOENT if create lease context not found
1406 struct lease_ctx_info *parse_lease_state(void *open_req)
1408 struct create_context *cc;
1409 struct smb2_create_req *req = (struct smb2_create_req *)open_req;
1410 struct lease_ctx_info *lreq;
1412 cc = smb2_find_context_vals(req, SMB2_CREATE_REQUEST_LEASE, 4);
1413 if (IS_ERR_OR_NULL(cc))
1416 lreq = kzalloc(sizeof(struct lease_ctx_info), GFP_KERNEL);
1420 if (sizeof(struct lease_context_v2) == le32_to_cpu(cc->DataLength)) {
1421 struct create_lease_v2 *lc = (struct create_lease_v2 *)cc;
1423 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
1424 lreq->req_state = lc->lcontext.LeaseState;
1425 lreq->flags = lc->lcontext.LeaseFlags;
1426 lreq->duration = lc->lcontext.LeaseDuration;
1427 memcpy(lreq->parent_lease_key, lc->lcontext.ParentLeaseKey,
1428 SMB2_LEASE_KEY_SIZE);
1431 struct create_lease *lc = (struct create_lease *)cc;
1433 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
1434 lreq->req_state = lc->lcontext.LeaseState;
1435 lreq->flags = lc->lcontext.LeaseFlags;
1436 lreq->duration = lc->lcontext.LeaseDuration;
1443 * smb2_find_context_vals() - find a particular context info in open request
1444 * @open_req: buffer containing smb2 file open(create) request
1445 * @tag: context name to search for
1446 * @tag_len: the length of tag
1448 * Return: pointer to requested context, NULL if @str context not found
1449 * or error pointer if name length is invalid.
1451 struct create_context *smb2_find_context_vals(void *open_req, const char *tag, int tag_len)
1453 struct create_context *cc;
1454 unsigned int next = 0;
1456 struct smb2_create_req *req = (struct smb2_create_req *)open_req;
1457 unsigned int remain_len, name_off, name_len, value_off, value_len,
1461 * CreateContextsOffset and CreateContextsLength are guaranteed to
1462 * be valid because of ksmbd_smb2_check_message().
1464 cc = (struct create_context *)((char *)req +
1465 le32_to_cpu(req->CreateContextsOffset));
1466 remain_len = le32_to_cpu(req->CreateContextsLength);
1468 cc = (struct create_context *)((char *)cc + next);
1469 if (remain_len < offsetof(struct create_context, Buffer))
1470 return ERR_PTR(-EINVAL);
1472 next = le32_to_cpu(cc->Next);
1473 name_off = le16_to_cpu(cc->NameOffset);
1474 name_len = le16_to_cpu(cc->NameLength);
1475 value_off = le16_to_cpu(cc->DataOffset);
1476 value_len = le32_to_cpu(cc->DataLength);
1477 cc_len = next ? next : remain_len;
1479 if ((next & 0x7) != 0 ||
1480 next > remain_len ||
1481 name_off != offsetof(struct create_context, Buffer) ||
1483 name_off + name_len > cc_len ||
1484 (value_off & 0x7) != 0 ||
1485 (value_len && value_off < name_off + (name_len < 8 ? 8 : name_len)) ||
1486 ((u64)value_off + value_len > cc_len))
1487 return ERR_PTR(-EINVAL);
1489 name = (char *)cc + name_off;
1490 if (name_len == tag_len && !memcmp(name, tag, name_len))
1494 } while (next != 0);
1500 * create_durable_rsp_buf() - create durable handle context
1501 * @cc: buffer to create durable context response
1503 void create_durable_rsp_buf(char *cc)
1505 struct create_durable_rsp *buf;
1507 buf = (struct create_durable_rsp *)cc;
1508 memset(buf, 0, sizeof(struct create_durable_rsp));
1509 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1510 (struct create_durable_rsp, Data));
1511 buf->ccontext.DataLength = cpu_to_le32(8);
1512 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1513 (struct create_durable_rsp, Name));
1514 buf->ccontext.NameLength = cpu_to_le16(4);
1515 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE is "DHnQ" */
1523 * create_durable_v2_rsp_buf() - create durable handle v2 context
1524 * @cc: buffer to create durable context response
1525 * @fp: ksmbd file pointer
1527 void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp)
1529 struct create_durable_v2_rsp *buf;
1531 buf = (struct create_durable_v2_rsp *)cc;
1532 memset(buf, 0, sizeof(struct create_durable_rsp));
1533 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1534 (struct create_durable_rsp, Data));
1535 buf->ccontext.DataLength = cpu_to_le32(8);
1536 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1537 (struct create_durable_rsp, Name));
1538 buf->ccontext.NameLength = cpu_to_le16(4);
1539 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE_V2 is "DH2Q" */
1545 buf->Timeout = cpu_to_le32(fp->durable_timeout);
1549 * create_mxac_rsp_buf() - create query maximal access context
1550 * @cc: buffer to create maximal access context response
1551 * @maximal_access: maximal access
1553 void create_mxac_rsp_buf(char *cc, int maximal_access)
1555 struct create_mxac_rsp *buf;
1557 buf = (struct create_mxac_rsp *)cc;
1558 memset(buf, 0, sizeof(struct create_mxac_rsp));
1559 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1560 (struct create_mxac_rsp, QueryStatus));
1561 buf->ccontext.DataLength = cpu_to_le32(8);
1562 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1563 (struct create_mxac_rsp, Name));
1564 buf->ccontext.NameLength = cpu_to_le16(4);
1565 /* SMB2_CREATE_QUERY_MAXIMAL_ACCESS_RESPONSE is "MxAc" */
1571 buf->QueryStatus = STATUS_SUCCESS;
1572 buf->MaximalAccess = cpu_to_le32(maximal_access);
1575 void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id)
1577 struct create_disk_id_rsp *buf;
1579 buf = (struct create_disk_id_rsp *)cc;
1580 memset(buf, 0, sizeof(struct create_disk_id_rsp));
1581 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1582 (struct create_disk_id_rsp, DiskFileId));
1583 buf->ccontext.DataLength = cpu_to_le32(32);
1584 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1585 (struct create_mxac_rsp, Name));
1586 buf->ccontext.NameLength = cpu_to_le16(4);
1587 /* SMB2_CREATE_QUERY_ON_DISK_ID_RESPONSE is "QFid" */
1593 buf->DiskFileId = cpu_to_le64(file_id);
1594 buf->VolumeId = cpu_to_le64(vol_id);
1598 * create_posix_rsp_buf() - create posix extension context
1599 * @cc: buffer to create posix on posix response
1600 * @fp: ksmbd file pointer
1602 void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp)
1604 struct create_posix_rsp *buf;
1605 struct inode *inode = file_inode(fp->filp);
1606 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
1607 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
1608 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
1610 buf = (struct create_posix_rsp *)cc;
1611 memset(buf, 0, sizeof(struct create_posix_rsp));
1612 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1613 (struct create_posix_rsp, nlink));
1615 * DataLength = nlink(4) + reparse_tag(4) + mode(4) +
1616 * domain sid(28) + unix group sid(16).
1618 buf->ccontext.DataLength = cpu_to_le32(56);
1619 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1620 (struct create_posix_rsp, Name));
1621 buf->ccontext.NameLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
1622 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
1623 buf->Name[0] = 0x93;
1624 buf->Name[1] = 0xAD;
1625 buf->Name[2] = 0x25;
1626 buf->Name[3] = 0x50;
1627 buf->Name[4] = 0x9C;
1628 buf->Name[5] = 0xB4;
1629 buf->Name[6] = 0x11;
1630 buf->Name[7] = 0xE7;
1631 buf->Name[8] = 0xB4;
1632 buf->Name[9] = 0x23;
1633 buf->Name[10] = 0x83;
1634 buf->Name[11] = 0xDE;
1635 buf->Name[12] = 0x96;
1636 buf->Name[13] = 0x8B;
1637 buf->Name[14] = 0xCD;
1638 buf->Name[15] = 0x7C;
1640 buf->nlink = cpu_to_le32(inode->i_nlink);
1641 buf->reparse_tag = cpu_to_le32(fp->volatile_id);
1642 buf->mode = cpu_to_le32(inode->i_mode & 0777);
1644 * SidBuffer(44) contain two sids(Domain sid(28), UNIX group sid(16)).
1645 * Domain sid(28) = revision(1) + num_subauth(1) + authority(6) +
1646 * sub_auth(4 * 4(num_subauth)) + RID(4).
1647 * UNIX group id(16) = revision(1) + num_subauth(1) + authority(6) +
1648 * sub_auth(4 * 1(num_subauth)) + RID(4).
1650 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
1651 SIDOWNER, (struct smb_sid *)&buf->SidBuffer[0]);
1652 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
1653 SIDUNIX_GROUP, (struct smb_sid *)&buf->SidBuffer[28]);
1657 * Find lease object(opinfo) for given lease key/fid from lease
1658 * break/file close path.
1661 * lookup_lease_in_table() - find a matching lease info object
1662 * @conn: connection instance
1663 * @lease_key: lease key to be searched for
1665 * Return: opinfo if found matching opinfo, otherwise NULL
1667 struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,
1670 struct oplock_info *opinfo = NULL, *ret_op = NULL;
1671 struct lease_table *lt;
1674 read_lock(&lease_list_lock);
1675 list_for_each_entry(lt, &lease_table_list, l_entry) {
1676 if (!memcmp(lt->client_guid, conn->ClientGUID,
1677 SMB2_CLIENT_GUID_SIZE))
1681 read_unlock(&lease_list_lock);
1686 list_for_each_entry_rcu(opinfo, <->lease_list, lease_entry) {
1687 if (!atomic_inc_not_zero(&opinfo->refcount))
1690 if (!opinfo->op_state || opinfo->op_state == OPLOCK_CLOSING)
1692 if (!(opinfo->o_lease->state &
1693 (SMB2_LEASE_HANDLE_CACHING_LE |
1694 SMB2_LEASE_WRITE_CACHING_LE)))
1696 ret = compare_guid_key(opinfo, conn->ClientGUID,
1699 ksmbd_debug(OPLOCK, "found opinfo\n");
1710 read_unlock(&lease_list_lock);