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) + 1;
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 (fp->reserve_lease_break)
400 smb_lazy_parent_lease_break_close(fp);
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)) {
550 lease->state |= lctx->req_state;
551 if (lctx->req_state &
552 SMB2_LEASE_WRITE_CACHING_LE)
553 lease_read_to_write(opinfo);
556 } else if ((atomic_read(&ci->op_count) +
557 atomic_read(&ci->sop_count)) > 1) {
558 if (lctx->req_state ==
559 (SMB2_LEASE_READ_CACHING_LE |
560 SMB2_LEASE_HANDLE_CACHING_LE)) {
562 lease->state = lctx->req_state;
566 if (lctx->req_state && lease->state ==
567 SMB2_LEASE_NONE_LE) {
569 lease_none_upgrade(opinfo, lctx->req_state);
572 read_lock(&ci->m_lock);
574 read_unlock(&ci->m_lock);
579 static void wait_for_break_ack(struct oplock_info *opinfo)
583 rc = wait_event_interruptible_timeout(opinfo->oplock_q,
584 opinfo->op_state == OPLOCK_STATE_NONE ||
585 opinfo->op_state == OPLOCK_CLOSING,
588 /* is this a timeout ? */
590 if (opinfo->is_lease)
591 opinfo->o_lease->state = SMB2_LEASE_NONE_LE;
592 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
593 opinfo->op_state = OPLOCK_STATE_NONE;
597 static void wake_up_oplock_break(struct oplock_info *opinfo)
599 clear_bit_unlock(0, &opinfo->pending_break);
600 /* memory barrier is needed for wake_up_bit() */
601 smp_mb__after_atomic();
602 wake_up_bit(&opinfo->pending_break, 0);
605 static int oplock_break_pending(struct oplock_info *opinfo, int req_op_level)
607 while (test_and_set_bit(0, &opinfo->pending_break)) {
608 wait_on_bit(&opinfo->pending_break, 0, TASK_UNINTERRUPTIBLE);
610 /* Not immediately break to none. */
611 opinfo->open_trunc = 0;
613 if (opinfo->op_state == OPLOCK_CLOSING)
615 else if (!opinfo->is_lease && opinfo->level <= req_op_level)
619 if (!opinfo->is_lease && opinfo->level <= req_op_level) {
620 wake_up_oplock_break(opinfo);
627 * __smb2_oplock_break_noti() - send smb2 oplock break cmd from conn
629 * @wk: smb work object
631 * There are two ways this function can be called. 1- while file open we break
632 * from exclusive/batch lock to levelII oplock and 2- while file write/truncate
633 * we break from levelII oplock no oplock.
634 * work->request_buf contains oplock_info.
636 static void __smb2_oplock_break_noti(struct work_struct *wk)
638 struct smb2_oplock_break *rsp = NULL;
639 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work);
640 struct oplock_break_info *br_info = work->request_buf;
641 struct smb2_hdr *rsp_hdr;
642 struct ksmbd_file *fp;
644 fp = ksmbd_lookup_durable_fd(br_info->fid);
648 if (allocate_interim_rsp_buf(work)) {
649 pr_err("smb2_allocate_rsp_buf failed! ");
650 ksmbd_fd_put(work, fp);
654 rsp_hdr = smb2_get_msg(work->response_buf);
655 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
656 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
657 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
658 rsp_hdr->CreditRequest = cpu_to_le16(0);
659 rsp_hdr->Command = SMB2_OPLOCK_BREAK;
660 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
661 rsp_hdr->NextCommand = 0;
662 rsp_hdr->MessageId = cpu_to_le64(-1);
663 rsp_hdr->Id.SyncId.ProcessId = 0;
664 rsp_hdr->Id.SyncId.TreeId = 0;
665 rsp_hdr->SessionId = 0;
666 memset(rsp_hdr->Signature, 0, 16);
668 rsp = smb2_get_msg(work->response_buf);
670 rsp->StructureSize = cpu_to_le16(24);
671 if (!br_info->open_trunc &&
672 (br_info->level == SMB2_OPLOCK_LEVEL_BATCH ||
673 br_info->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
674 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_II;
676 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
679 rsp->PersistentFid = fp->persistent_id;
680 rsp->VolatileFid = fp->volatile_id;
682 ksmbd_fd_put(work, fp);
683 if (ksmbd_iov_pin_rsp(work, (void *)rsp,
684 sizeof(struct smb2_oplock_break)))
688 "sending oplock break v_id %llu p_id = %llu lock level = %d\n",
689 rsp->VolatileFid, rsp->PersistentFid, rsp->OplockLevel);
691 ksmbd_conn_write(work);
694 ksmbd_free_work_struct(work);
698 * smb2_oplock_break_noti() - send smb2 exclusive/batch to level2 oplock
699 * break command from server to client
700 * @opinfo: oplock info object
702 * Return: 0 on success, otherwise error
704 static int smb2_oplock_break_noti(struct oplock_info *opinfo)
706 struct ksmbd_conn *conn = opinfo->conn;
707 struct oplock_break_info *br_info;
709 struct ksmbd_work *work = ksmbd_alloc_work_struct();
714 br_info = kmalloc(sizeof(struct oplock_break_info), GFP_KERNEL);
716 ksmbd_free_work_struct(work);
720 br_info->level = opinfo->level;
721 br_info->fid = opinfo->fid;
722 br_info->open_trunc = opinfo->open_trunc;
724 work->request_buf = (char *)br_info;
726 work->sess = opinfo->sess;
728 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
729 INIT_WORK(&work->work, __smb2_oplock_break_noti);
730 ksmbd_queue_work(work);
732 wait_for_break_ack(opinfo);
734 __smb2_oplock_break_noti(&work->work);
735 if (opinfo->level == SMB2_OPLOCK_LEVEL_II)
736 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
742 * __smb2_lease_break_noti() - send lease break command from server
744 * @wk: smb work object
746 static void __smb2_lease_break_noti(struct work_struct *wk)
748 struct smb2_lease_break *rsp = NULL;
749 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work);
750 struct lease_break_info *br_info = work->request_buf;
751 struct smb2_hdr *rsp_hdr;
753 if (allocate_interim_rsp_buf(work)) {
754 ksmbd_debug(OPLOCK, "smb2_allocate_rsp_buf failed! ");
758 rsp_hdr = smb2_get_msg(work->response_buf);
759 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
760 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
761 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
762 rsp_hdr->CreditRequest = cpu_to_le16(0);
763 rsp_hdr->Command = SMB2_OPLOCK_BREAK;
764 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
765 rsp_hdr->NextCommand = 0;
766 rsp_hdr->MessageId = cpu_to_le64(-1);
767 rsp_hdr->Id.SyncId.ProcessId = 0;
768 rsp_hdr->Id.SyncId.TreeId = 0;
769 rsp_hdr->SessionId = 0;
770 memset(rsp_hdr->Signature, 0, 16);
772 rsp = smb2_get_msg(work->response_buf);
773 rsp->StructureSize = cpu_to_le16(44);
774 rsp->Epoch = br_info->epoch;
777 if (br_info->curr_state & (SMB2_LEASE_WRITE_CACHING_LE |
778 SMB2_LEASE_HANDLE_CACHING_LE))
779 rsp->Flags = SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED;
781 memcpy(rsp->LeaseKey, br_info->lease_key, SMB2_LEASE_KEY_SIZE);
782 rsp->CurrentLeaseState = br_info->curr_state;
783 rsp->NewLeaseState = br_info->new_state;
784 rsp->BreakReason = 0;
785 rsp->AccessMaskHint = 0;
786 rsp->ShareMaskHint = 0;
788 if (ksmbd_iov_pin_rsp(work, (void *)rsp,
789 sizeof(struct smb2_lease_break)))
792 ksmbd_conn_write(work);
795 ksmbd_free_work_struct(work);
799 * smb2_lease_break_noti() - break lease when a new client request
801 * @opinfo: conains lease state information
803 * Return: 0 on success, otherwise error
805 static int smb2_lease_break_noti(struct oplock_info *opinfo)
807 struct ksmbd_conn *conn = opinfo->conn;
808 struct list_head *tmp, *t;
809 struct ksmbd_work *work;
810 struct lease_break_info *br_info;
811 struct lease *lease = opinfo->o_lease;
813 work = ksmbd_alloc_work_struct();
817 br_info = kmalloc(sizeof(struct lease_break_info), GFP_KERNEL);
819 ksmbd_free_work_struct(work);
823 br_info->curr_state = lease->state;
824 br_info->new_state = lease->new_state;
825 if (lease->version == 2)
826 br_info->epoch = cpu_to_le16(++lease->epoch);
829 memcpy(br_info->lease_key, lease->lease_key, SMB2_LEASE_KEY_SIZE);
831 work->request_buf = (char *)br_info;
833 work->sess = opinfo->sess;
835 if (opinfo->op_state == OPLOCK_ACK_WAIT) {
836 list_for_each_safe(tmp, t, &opinfo->interim_list) {
837 struct ksmbd_work *in_work;
839 in_work = list_entry(tmp, struct ksmbd_work,
841 setup_async_work(in_work, NULL, NULL);
842 smb2_send_interim_resp(in_work, STATUS_PENDING);
843 list_del_init(&in_work->interim_entry);
844 release_async_work(in_work);
846 INIT_WORK(&work->work, __smb2_lease_break_noti);
847 ksmbd_queue_work(work);
848 wait_for_break_ack(opinfo);
850 __smb2_lease_break_noti(&work->work);
851 if (opinfo->o_lease->new_state == SMB2_LEASE_NONE_LE) {
852 opinfo->level = SMB2_OPLOCK_LEVEL_NONE;
853 opinfo->o_lease->state = SMB2_LEASE_NONE_LE;
859 static void wait_lease_breaking(struct oplock_info *opinfo)
861 if (!opinfo->is_lease)
864 wake_up_interruptible_all(&opinfo->oplock_brk);
865 if (atomic_read(&opinfo->breaking_cnt)) {
868 ret = wait_event_interruptible_timeout(opinfo->oplock_brk,
869 atomic_read(&opinfo->breaking_cnt) == 0,
872 atomic_set(&opinfo->breaking_cnt, 0);
876 static int oplock_break(struct oplock_info *brk_opinfo, int req_op_level)
880 /* Need to break exclusive/batch oplock, write lease or overwrite_if */
882 "request to send oplock(level : 0x%x) break notification\n",
885 if (brk_opinfo->is_lease) {
886 struct lease *lease = brk_opinfo->o_lease;
888 atomic_inc(&brk_opinfo->breaking_cnt);
890 err = oplock_break_pending(brk_opinfo, req_op_level);
892 return err < 0 ? err : 0;
894 if (brk_opinfo->open_trunc) {
896 * Create overwrite break trigger the lease break to
899 lease->new_state = SMB2_LEASE_NONE_LE;
901 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) {
902 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
904 SMB2_LEASE_READ_CACHING_LE |
905 SMB2_LEASE_HANDLE_CACHING_LE;
908 SMB2_LEASE_READ_CACHING_LE;
910 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE &&
913 SMB2_LEASE_READ_CACHING_LE;
915 lease->new_state = SMB2_LEASE_NONE_LE;
919 if (lease->state & (SMB2_LEASE_WRITE_CACHING_LE |
920 SMB2_LEASE_HANDLE_CACHING_LE))
921 brk_opinfo->op_state = OPLOCK_ACK_WAIT;
923 atomic_dec(&brk_opinfo->breaking_cnt);
925 err = oplock_break_pending(brk_opinfo, req_op_level);
927 return err < 0 ? err : 0;
929 if (brk_opinfo->level == SMB2_OPLOCK_LEVEL_BATCH ||
930 brk_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
931 brk_opinfo->op_state = OPLOCK_ACK_WAIT;
934 if (brk_opinfo->is_lease)
935 err = smb2_lease_break_noti(brk_opinfo);
937 err = smb2_oplock_break_noti(brk_opinfo);
939 ksmbd_debug(OPLOCK, "oplock granted = %d\n", brk_opinfo->level);
940 if (brk_opinfo->op_state == OPLOCK_CLOSING)
942 wake_up_oplock_break(brk_opinfo);
944 wait_lease_breaking(brk_opinfo);
949 void destroy_lease_table(struct ksmbd_conn *conn)
951 struct lease_table *lb, *lbtmp;
952 struct oplock_info *opinfo;
954 write_lock(&lease_list_lock);
955 if (list_empty(&lease_table_list)) {
956 write_unlock(&lease_list_lock);
960 list_for_each_entry_safe(lb, lbtmp, &lease_table_list, l_entry) {
961 if (conn && memcmp(lb->client_guid, conn->ClientGUID,
962 SMB2_CLIENT_GUID_SIZE))
966 list_for_each_entry_rcu(opinfo, &lb->lease_list,
969 lease_del_list(opinfo);
973 list_del(&lb->l_entry);
976 write_unlock(&lease_list_lock);
979 int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
980 struct lease_ctx_info *lctx)
982 struct oplock_info *opinfo;
984 struct lease_table *lb;
989 read_lock(&lease_list_lock);
990 if (list_empty(&lease_table_list)) {
991 read_unlock(&lease_list_lock);
995 list_for_each_entry(lb, &lease_table_list, l_entry) {
996 if (!memcmp(lb->client_guid, sess->ClientGUID,
997 SMB2_CLIENT_GUID_SIZE))
1000 read_unlock(&lease_list_lock);
1006 list_for_each_entry_rcu(opinfo, &lb->lease_list, lease_entry) {
1007 if (!atomic_inc_not_zero(&opinfo->refcount))
1010 if (opinfo->o_fp->f_ci == ci)
1012 err = compare_guid_key(opinfo, sess->ClientGUID,
1017 "found same lease key is already used in other files\n");
1028 read_unlock(&lease_list_lock);
1032 static void copy_lease(struct oplock_info *op1, struct oplock_info *op2)
1034 struct lease *lease1 = op1->o_lease;
1035 struct lease *lease2 = op2->o_lease;
1037 op2->level = op1->level;
1038 lease2->state = lease1->state;
1039 memcpy(lease2->lease_key, lease1->lease_key,
1040 SMB2_LEASE_KEY_SIZE);
1041 lease2->duration = lease1->duration;
1042 lease2->flags = lease1->flags;
1043 lease2->epoch = lease1->epoch;
1044 lease2->version = lease1->version;
1047 static int add_lease_global_list(struct oplock_info *opinfo)
1049 struct lease_table *lb;
1051 read_lock(&lease_list_lock);
1052 list_for_each_entry(lb, &lease_table_list, l_entry) {
1053 if (!memcmp(lb->client_guid, opinfo->conn->ClientGUID,
1054 SMB2_CLIENT_GUID_SIZE)) {
1055 opinfo->o_lease->l_lb = lb;
1056 lease_add_list(opinfo);
1057 read_unlock(&lease_list_lock);
1061 read_unlock(&lease_list_lock);
1063 lb = kmalloc(sizeof(struct lease_table), GFP_KERNEL);
1067 memcpy(lb->client_guid, opinfo->conn->ClientGUID,
1068 SMB2_CLIENT_GUID_SIZE);
1069 INIT_LIST_HEAD(&lb->lease_list);
1070 spin_lock_init(&lb->lb_lock);
1071 opinfo->o_lease->l_lb = lb;
1072 lease_add_list(opinfo);
1077 static void set_oplock_level(struct oplock_info *opinfo, int level,
1078 struct lease_ctx_info *lctx)
1081 case SMB2_OPLOCK_LEVEL_BATCH:
1082 case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
1083 grant_write_oplock(opinfo, level, lctx);
1085 case SMB2_OPLOCK_LEVEL_II:
1086 grant_read_oplock(opinfo, lctx);
1089 grant_none_oplock(opinfo, lctx);
1094 void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
1095 struct lease_ctx_info *lctx)
1097 struct oplock_info *opinfo;
1098 struct ksmbd_inode *p_ci = NULL;
1100 if (lctx->version != 2)
1103 p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent);
1107 read_lock(&p_ci->m_lock);
1108 list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) {
1109 if (!opinfo->is_lease)
1112 if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE &&
1113 (!(lctx->flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) ||
1114 !compare_guid_key(opinfo, fp->conn->ClientGUID,
1115 lctx->parent_lease_key))) {
1116 if (!atomic_inc_not_zero(&opinfo->refcount))
1119 atomic_inc(&opinfo->conn->r_count);
1120 if (ksmbd_conn_releasing(opinfo->conn)) {
1121 atomic_dec(&opinfo->conn->r_count);
1125 read_unlock(&p_ci->m_lock);
1126 oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE);
1127 opinfo_conn_put(opinfo);
1128 read_lock(&p_ci->m_lock);
1131 read_unlock(&p_ci->m_lock);
1133 ksmbd_inode_put(p_ci);
1136 void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp)
1138 struct oplock_info *opinfo;
1139 struct ksmbd_inode *p_ci = NULL;
1142 opinfo = rcu_dereference(fp->f_opinfo);
1145 if (!opinfo->is_lease || opinfo->o_lease->version != 2)
1148 p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent);
1152 read_lock(&p_ci->m_lock);
1153 list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) {
1154 if (!opinfo->is_lease)
1157 if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE) {
1158 if (!atomic_inc_not_zero(&opinfo->refcount))
1161 atomic_inc(&opinfo->conn->r_count);
1162 if (ksmbd_conn_releasing(opinfo->conn)) {
1163 atomic_dec(&opinfo->conn->r_count);
1166 read_unlock(&p_ci->m_lock);
1167 oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE);
1168 opinfo_conn_put(opinfo);
1169 read_lock(&p_ci->m_lock);
1172 read_unlock(&p_ci->m_lock);
1174 ksmbd_inode_put(p_ci);
1178 * smb_grant_oplock() - handle oplock/lease request on file open
1180 * @req_op_level: oplock level
1181 * @pid: id of open file
1182 * @fp: ksmbd file pointer
1183 * @tid: Tree id of connection
1184 * @lctx: lease context information on file open
1185 * @share_ret: share mode
1187 * Return: 0 on success, otherwise error
1189 int smb_grant_oplock(struct ksmbd_work *work, int req_op_level, u64 pid,
1190 struct ksmbd_file *fp, __u16 tid,
1191 struct lease_ctx_info *lctx, int share_ret)
1193 struct ksmbd_session *sess = work->sess;
1195 struct oplock_info *opinfo = NULL, *prev_opinfo = NULL;
1196 struct ksmbd_inode *ci = fp->f_ci;
1197 bool prev_op_has_lease;
1198 __le32 prev_op_state = 0;
1200 /* Only v2 leases handle the directory */
1201 if (S_ISDIR(file_inode(fp->filp)->i_mode)) {
1202 if (!lctx || lctx->version != 2)
1206 opinfo = alloc_opinfo(work, pid, tid);
1211 err = alloc_lease(opinfo, lctx);
1214 opinfo->is_lease = 1;
1217 /* ci does not have any oplock */
1218 if (!opinfo_count(fp))
1221 /* grant none-oplock if second open is trunc */
1222 if (fp->attrib_only && fp->cdoption != FILE_OVERWRITE_IF_LE &&
1223 fp->cdoption != FILE_OVERWRITE_LE &&
1224 fp->cdoption != FILE_SUPERSEDE_LE) {
1225 req_op_level = SMB2_OPLOCK_LEVEL_NONE;
1230 struct oplock_info *m_opinfo;
1232 /* is lease already granted ? */
1233 m_opinfo = same_client_has_lease(ci, sess->ClientGUID,
1236 copy_lease(m_opinfo, opinfo);
1237 if (atomic_read(&m_opinfo->breaking_cnt))
1238 opinfo->o_lease->flags =
1239 SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE;
1243 prev_opinfo = opinfo_get_list(ci);
1245 (prev_opinfo->level == SMB2_OPLOCK_LEVEL_NONE && lctx)) {
1246 opinfo_conn_put(prev_opinfo);
1249 prev_op_has_lease = prev_opinfo->is_lease;
1250 if (prev_op_has_lease)
1251 prev_op_state = prev_opinfo->o_lease->state;
1253 if (share_ret < 0 &&
1254 prev_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1256 opinfo_conn_put(prev_opinfo);
1260 if (prev_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH &&
1261 prev_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1262 opinfo_conn_put(prev_opinfo);
1263 goto op_break_not_needed;
1266 list_add(&work->interim_entry, &prev_opinfo->interim_list);
1267 err = oplock_break(prev_opinfo, SMB2_OPLOCK_LEVEL_II);
1268 opinfo_conn_put(prev_opinfo);
1271 /* Check all oplock was freed by close */
1275 op_break_not_needed:
1276 if (share_ret < 0) {
1281 if (req_op_level != SMB2_OPLOCK_LEVEL_NONE)
1282 req_op_level = SMB2_OPLOCK_LEVEL_II;
1284 /* grant fixed oplock on stacked locking between lease and oplock */
1285 if (prev_op_has_lease && !lctx)
1286 if (prev_op_state & SMB2_LEASE_HANDLE_CACHING_LE)
1287 req_op_level = SMB2_OPLOCK_LEVEL_NONE;
1289 if (!prev_op_has_lease && lctx) {
1290 req_op_level = SMB2_OPLOCK_LEVEL_II;
1291 lctx->req_state = SMB2_LEASE_READ_CACHING_LE;
1295 set_oplock_level(opinfo, req_op_level, lctx);
1298 rcu_assign_pointer(fp->f_opinfo, opinfo);
1301 opinfo_count_inc(fp);
1303 if (opinfo->is_lease) {
1304 err = add_lease_global_list(opinfo);
1311 free_opinfo(opinfo);
1316 * smb_break_all_write_oplock() - break batch/exclusive oplock to level2
1318 * @fp: ksmbd file pointer
1319 * @is_trunc: truncate on open
1321 static void smb_break_all_write_oplock(struct ksmbd_work *work,
1322 struct ksmbd_file *fp, int is_trunc)
1324 struct oplock_info *brk_opinfo;
1326 brk_opinfo = opinfo_get_list(fp->f_ci);
1329 if (brk_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH &&
1330 brk_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1331 opinfo_conn_put(brk_opinfo);
1335 brk_opinfo->open_trunc = is_trunc;
1336 list_add(&work->interim_entry, &brk_opinfo->interim_list);
1337 oplock_break(brk_opinfo, SMB2_OPLOCK_LEVEL_II);
1338 opinfo_conn_put(brk_opinfo);
1342 * smb_break_all_levII_oplock() - send level2 oplock or read lease break command
1343 * from server to client
1345 * @fp: ksmbd file pointer
1346 * @is_trunc: truncate on open
1348 void smb_break_all_levII_oplock(struct ksmbd_work *work, struct ksmbd_file *fp,
1351 struct oplock_info *op, *brk_op;
1352 struct ksmbd_inode *ci;
1353 struct ksmbd_conn *conn = work->conn;
1355 if (!test_share_config_flag(work->tcon->share_conf,
1356 KSMBD_SHARE_FLAG_OPLOCKS))
1360 op = opinfo_get(fp);
1363 list_for_each_entry_rcu(brk_op, &ci->m_op_list, op_entry) {
1364 if (!atomic_inc_not_zero(&brk_op->refcount))
1367 atomic_inc(&brk_op->conn->r_count);
1368 if (ksmbd_conn_releasing(brk_op->conn)) {
1369 atomic_dec(&brk_op->conn->r_count);
1374 if (brk_op->is_lease && (brk_op->o_lease->state &
1375 (~(SMB2_LEASE_READ_CACHING_LE |
1376 SMB2_LEASE_HANDLE_CACHING_LE)))) {
1377 ksmbd_debug(OPLOCK, "unexpected lease state(0x%x)\n",
1378 brk_op->o_lease->state);
1380 } else if (brk_op->level !=
1381 SMB2_OPLOCK_LEVEL_II) {
1382 ksmbd_debug(OPLOCK, "unexpected oplock(0x%x)\n",
1387 /* Skip oplock being break to none */
1388 if (brk_op->is_lease &&
1389 brk_op->o_lease->new_state == SMB2_LEASE_NONE_LE &&
1390 atomic_read(&brk_op->breaking_cnt))
1393 if (op && op->is_lease && brk_op->is_lease &&
1394 !memcmp(conn->ClientGUID, brk_op->conn->ClientGUID,
1395 SMB2_CLIENT_GUID_SIZE) &&
1396 !memcmp(op->o_lease->lease_key, brk_op->o_lease->lease_key,
1397 SMB2_LEASE_KEY_SIZE))
1399 brk_op->open_trunc = is_trunc;
1400 oplock_break(brk_op, SMB2_OPLOCK_LEVEL_NONE);
1402 opinfo_conn_put(brk_op);
1412 * smb_break_all_oplock() - break both batch/exclusive and level2 oplock
1414 * @fp: ksmbd file pointer
1416 void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp)
1418 if (!test_share_config_flag(work->tcon->share_conf,
1419 KSMBD_SHARE_FLAG_OPLOCKS))
1422 smb_break_all_write_oplock(work, fp, 1);
1423 smb_break_all_levII_oplock(work, fp, 1);
1427 * smb2_map_lease_to_oplock() - map lease state to corresponding oplock type
1428 * @lease_state: lease type
1430 * Return: 0 if no mapping, otherwise corresponding oplock type
1432 __u8 smb2_map_lease_to_oplock(__le32 lease_state)
1434 if (lease_state == (SMB2_LEASE_HANDLE_CACHING_LE |
1435 SMB2_LEASE_READ_CACHING_LE |
1436 SMB2_LEASE_WRITE_CACHING_LE)) {
1437 return SMB2_OPLOCK_LEVEL_BATCH;
1438 } else if (lease_state != SMB2_LEASE_WRITE_CACHING_LE &&
1439 lease_state & SMB2_LEASE_WRITE_CACHING_LE) {
1440 if (!(lease_state & SMB2_LEASE_HANDLE_CACHING_LE))
1441 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
1442 } else if (lease_state & SMB2_LEASE_READ_CACHING_LE) {
1443 return SMB2_OPLOCK_LEVEL_II;
1449 * create_lease_buf() - create lease context for open cmd response
1450 * @rbuf: buffer to create lease context response
1451 * @lease: buffer to stored parsed lease state information
1453 void create_lease_buf(u8 *rbuf, struct lease *lease)
1455 if (lease->version == 2) {
1456 struct create_lease_v2 *buf = (struct create_lease_v2 *)rbuf;
1458 memset(buf, 0, sizeof(struct create_lease_v2));
1459 memcpy(buf->lcontext.LeaseKey, lease->lease_key,
1460 SMB2_LEASE_KEY_SIZE);
1461 buf->lcontext.LeaseFlags = lease->flags;
1462 buf->lcontext.Epoch = cpu_to_le16(lease->epoch);
1463 buf->lcontext.LeaseState = lease->state;
1464 memcpy(buf->lcontext.ParentLeaseKey, lease->parent_lease_key,
1465 SMB2_LEASE_KEY_SIZE);
1466 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1467 (struct create_lease_v2, lcontext));
1468 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1469 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1470 (struct create_lease_v2, Name));
1471 buf->ccontext.NameLength = cpu_to_le16(4);
1477 struct create_lease *buf = (struct create_lease *)rbuf;
1479 memset(buf, 0, sizeof(struct create_lease));
1480 memcpy(buf->lcontext.LeaseKey, lease->lease_key, SMB2_LEASE_KEY_SIZE);
1481 buf->lcontext.LeaseFlags = lease->flags;
1482 buf->lcontext.LeaseState = lease->state;
1483 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1484 (struct create_lease, lcontext));
1485 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1486 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1487 (struct create_lease, Name));
1488 buf->ccontext.NameLength = cpu_to_le16(4);
1497 * parse_lease_state() - parse lease context containted in file open request
1498 * @open_req: buffer containing smb2 file open(create) request
1499 * @is_dir: whether leasing file is directory
1501 * Return: oplock state, -ENOENT if create lease context not found
1503 struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir)
1505 struct create_context *cc;
1506 struct smb2_create_req *req = (struct smb2_create_req *)open_req;
1507 struct lease_ctx_info *lreq;
1509 cc = smb2_find_context_vals(req, SMB2_CREATE_REQUEST_LEASE, 4);
1510 if (IS_ERR_OR_NULL(cc))
1513 lreq = kzalloc(sizeof(struct lease_ctx_info), GFP_KERNEL);
1517 if (sizeof(struct lease_context_v2) == le32_to_cpu(cc->DataLength)) {
1518 struct create_lease_v2 *lc = (struct create_lease_v2 *)cc;
1520 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
1522 lreq->req_state = lc->lcontext.LeaseState &
1523 ~SMB2_LEASE_WRITE_CACHING_LE;
1524 lreq->is_dir = true;
1526 lreq->req_state = lc->lcontext.LeaseState;
1527 lreq->flags = lc->lcontext.LeaseFlags;
1528 lreq->epoch = lc->lcontext.Epoch;
1529 lreq->duration = lc->lcontext.LeaseDuration;
1530 memcpy(lreq->parent_lease_key, lc->lcontext.ParentLeaseKey,
1531 SMB2_LEASE_KEY_SIZE);
1534 struct create_lease *lc = (struct create_lease *)cc;
1536 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
1537 lreq->req_state = lc->lcontext.LeaseState;
1538 lreq->flags = lc->lcontext.LeaseFlags;
1539 lreq->duration = lc->lcontext.LeaseDuration;
1546 * smb2_find_context_vals() - find a particular context info in open request
1547 * @open_req: buffer containing smb2 file open(create) request
1548 * @tag: context name to search for
1549 * @tag_len: the length of tag
1551 * Return: pointer to requested context, NULL if @str context not found
1552 * or error pointer if name length is invalid.
1554 struct create_context *smb2_find_context_vals(void *open_req, const char *tag, int tag_len)
1556 struct create_context *cc;
1557 unsigned int next = 0;
1559 struct smb2_create_req *req = (struct smb2_create_req *)open_req;
1560 unsigned int remain_len, name_off, name_len, value_off, value_len,
1564 * CreateContextsOffset and CreateContextsLength are guaranteed to
1565 * be valid because of ksmbd_smb2_check_message().
1567 cc = (struct create_context *)((char *)req +
1568 le32_to_cpu(req->CreateContextsOffset));
1569 remain_len = le32_to_cpu(req->CreateContextsLength);
1571 cc = (struct create_context *)((char *)cc + next);
1572 if (remain_len < offsetof(struct create_context, Buffer))
1573 return ERR_PTR(-EINVAL);
1575 next = le32_to_cpu(cc->Next);
1576 name_off = le16_to_cpu(cc->NameOffset);
1577 name_len = le16_to_cpu(cc->NameLength);
1578 value_off = le16_to_cpu(cc->DataOffset);
1579 value_len = le32_to_cpu(cc->DataLength);
1580 cc_len = next ? next : remain_len;
1582 if ((next & 0x7) != 0 ||
1583 next > remain_len ||
1584 name_off != offsetof(struct create_context, Buffer) ||
1586 name_off + name_len > cc_len ||
1587 (value_off & 0x7) != 0 ||
1588 (value_len && value_off < name_off + (name_len < 8 ? 8 : name_len)) ||
1589 ((u64)value_off + value_len > cc_len))
1590 return ERR_PTR(-EINVAL);
1592 name = (char *)cc + name_off;
1593 if (name_len == tag_len && !memcmp(name, tag, name_len))
1597 } while (next != 0);
1603 * create_durable_rsp_buf() - create durable handle context
1604 * @cc: buffer to create durable context response
1606 void create_durable_rsp_buf(char *cc)
1608 struct create_durable_rsp *buf;
1610 buf = (struct create_durable_rsp *)cc;
1611 memset(buf, 0, sizeof(struct create_durable_rsp));
1612 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1613 (struct create_durable_rsp, Data));
1614 buf->ccontext.DataLength = cpu_to_le32(8);
1615 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1616 (struct create_durable_rsp, Name));
1617 buf->ccontext.NameLength = cpu_to_le16(4);
1618 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE is "DHnQ" */
1626 * create_durable_v2_rsp_buf() - create durable handle v2 context
1627 * @cc: buffer to create durable context response
1628 * @fp: ksmbd file pointer
1630 void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp)
1632 struct create_durable_v2_rsp *buf;
1634 buf = (struct create_durable_v2_rsp *)cc;
1635 memset(buf, 0, sizeof(struct create_durable_rsp));
1636 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1637 (struct create_durable_rsp, Data));
1638 buf->ccontext.DataLength = cpu_to_le32(8);
1639 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1640 (struct create_durable_rsp, Name));
1641 buf->ccontext.NameLength = cpu_to_le16(4);
1642 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE_V2 is "DH2Q" */
1648 buf->Timeout = cpu_to_le32(fp->durable_timeout);
1652 * create_mxac_rsp_buf() - create query maximal access context
1653 * @cc: buffer to create maximal access context response
1654 * @maximal_access: maximal access
1656 void create_mxac_rsp_buf(char *cc, int maximal_access)
1658 struct create_mxac_rsp *buf;
1660 buf = (struct create_mxac_rsp *)cc;
1661 memset(buf, 0, sizeof(struct create_mxac_rsp));
1662 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1663 (struct create_mxac_rsp, QueryStatus));
1664 buf->ccontext.DataLength = cpu_to_le32(8);
1665 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1666 (struct create_mxac_rsp, Name));
1667 buf->ccontext.NameLength = cpu_to_le16(4);
1668 /* SMB2_CREATE_QUERY_MAXIMAL_ACCESS_RESPONSE is "MxAc" */
1674 buf->QueryStatus = STATUS_SUCCESS;
1675 buf->MaximalAccess = cpu_to_le32(maximal_access);
1678 void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id)
1680 struct create_disk_id_rsp *buf;
1682 buf = (struct create_disk_id_rsp *)cc;
1683 memset(buf, 0, sizeof(struct create_disk_id_rsp));
1684 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1685 (struct create_disk_id_rsp, DiskFileId));
1686 buf->ccontext.DataLength = cpu_to_le32(32);
1687 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1688 (struct create_mxac_rsp, Name));
1689 buf->ccontext.NameLength = cpu_to_le16(4);
1690 /* SMB2_CREATE_QUERY_ON_DISK_ID_RESPONSE is "QFid" */
1696 buf->DiskFileId = cpu_to_le64(file_id);
1697 buf->VolumeId = cpu_to_le64(vol_id);
1701 * create_posix_rsp_buf() - create posix extension context
1702 * @cc: buffer to create posix on posix response
1703 * @fp: ksmbd file pointer
1705 void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp)
1707 struct create_posix_rsp *buf;
1708 struct inode *inode = file_inode(fp->filp);
1709 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
1710 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
1711 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
1713 buf = (struct create_posix_rsp *)cc;
1714 memset(buf, 0, sizeof(struct create_posix_rsp));
1715 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1716 (struct create_posix_rsp, nlink));
1718 * DataLength = nlink(4) + reparse_tag(4) + mode(4) +
1719 * domain sid(28) + unix group sid(16).
1721 buf->ccontext.DataLength = cpu_to_le32(56);
1722 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1723 (struct create_posix_rsp, Name));
1724 buf->ccontext.NameLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
1725 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
1726 buf->Name[0] = 0x93;
1727 buf->Name[1] = 0xAD;
1728 buf->Name[2] = 0x25;
1729 buf->Name[3] = 0x50;
1730 buf->Name[4] = 0x9C;
1731 buf->Name[5] = 0xB4;
1732 buf->Name[6] = 0x11;
1733 buf->Name[7] = 0xE7;
1734 buf->Name[8] = 0xB4;
1735 buf->Name[9] = 0x23;
1736 buf->Name[10] = 0x83;
1737 buf->Name[11] = 0xDE;
1738 buf->Name[12] = 0x96;
1739 buf->Name[13] = 0x8B;
1740 buf->Name[14] = 0xCD;
1741 buf->Name[15] = 0x7C;
1743 buf->nlink = cpu_to_le32(inode->i_nlink);
1744 buf->reparse_tag = cpu_to_le32(fp->volatile_id);
1745 buf->mode = cpu_to_le32(inode->i_mode & 0777);
1747 * SidBuffer(44) contain two sids(Domain sid(28), UNIX group sid(16)).
1748 * Domain sid(28) = revision(1) + num_subauth(1) + authority(6) +
1749 * sub_auth(4 * 4(num_subauth)) + RID(4).
1750 * UNIX group id(16) = revision(1) + num_subauth(1) + authority(6) +
1751 * sub_auth(4 * 1(num_subauth)) + RID(4).
1753 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
1754 SIDOWNER, (struct smb_sid *)&buf->SidBuffer[0]);
1755 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
1756 SIDUNIX_GROUP, (struct smb_sid *)&buf->SidBuffer[28]);
1760 * Find lease object(opinfo) for given lease key/fid from lease
1761 * break/file close path.
1764 * lookup_lease_in_table() - find a matching lease info object
1765 * @conn: connection instance
1766 * @lease_key: lease key to be searched for
1768 * Return: opinfo if found matching opinfo, otherwise NULL
1770 struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,
1773 struct oplock_info *opinfo = NULL, *ret_op = NULL;
1774 struct lease_table *lt;
1777 read_lock(&lease_list_lock);
1778 list_for_each_entry(lt, &lease_table_list, l_entry) {
1779 if (!memcmp(lt->client_guid, conn->ClientGUID,
1780 SMB2_CLIENT_GUID_SIZE))
1784 read_unlock(&lease_list_lock);
1789 list_for_each_entry_rcu(opinfo, <->lease_list, lease_entry) {
1790 if (!atomic_inc_not_zero(&opinfo->refcount))
1793 if (!opinfo->op_state || opinfo->op_state == OPLOCK_CLOSING)
1795 if (!(opinfo->o_lease->state &
1796 (SMB2_LEASE_HANDLE_CACHING_LE |
1797 SMB2_LEASE_WRITE_CACHING_LE)))
1799 ret = compare_guid_key(opinfo, conn->ClientGUID,
1802 ksmbd_debug(OPLOCK, "found opinfo\n");
1813 read_unlock(&lease_list_lock);