118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2019 Samsung Electronics Co., Ltd.
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*/
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#ifndef __KSMBD_WORK_H__
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#define __KSMBD_WORK_H__
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#include <linux/ctype.h>
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#include <linux/workqueue.h>
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struct ksmbd_conn;
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struct ksmbd_session;
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struct ksmbd_tree_connect;
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enum {
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KSMBD_WORK_ACTIVE = 0,
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KSMBD_WORK_CANCELLED,
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KSMBD_WORK_CLOSED,
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};
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/* one of these for every pending CIFS request at the connection */
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struct ksmbd_work {
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/* Server corresponding to this mid */
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struct ksmbd_conn *conn;
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struct ksmbd_session *sess;
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struct ksmbd_tree_connect *tcon;
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/* Pointer to received SMB header */
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void *request_buf;
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/* Response buffer */
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void *response_buf;
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/* Read data buffer */
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void *aux_payload_buf;
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/* Next cmd hdr in compound req buf*/
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int next_smb2_rcv_hdr_off;
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/* Next cmd hdr in compound rsp buf*/
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int next_smb2_rsp_hdr_off;
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/*
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* Current Local FID assigned compound response if SMB2 CREATE
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* command is present in compound request
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*/
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u64 compound_fid;
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u64 compound_pfid;
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u64 compound_sid;
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const struct cred *saved_cred;
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/* Number of granted credits */
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unsigned int credits_granted;
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/* response smb header size */
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unsigned int resp_hdr_sz;
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unsigned int response_sz;
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/* Read data count */
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unsigned int aux_payload_sz;
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void *tr_buf;
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unsigned char state;
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/* Multiple responses for one request e.g. SMB ECHO */
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bool multiRsp:1;
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/* No response for cancelled request */
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bool send_no_response:1;
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/* Request is encrypted */
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bool encrypted:1;
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/* Is this SYNC or ASYNC ksmbd_work */
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bool asynchronous:1;
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bool need_invalidate_rkey:1;
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unsigned int remote_key;
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/* cancel works */
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int async_id;
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void **cancel_argv;
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void (*cancel_fn)(void **argv);
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struct work_struct work;
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/* List head at conn->requests */
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struct list_head request_entry;
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/* List head at conn->async_requests */
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struct list_head async_request_entry;
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struct list_head fp_entry;
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struct list_head interim_entry;
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};
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/**
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* ksmbd_resp_buf_next - Get next buffer on compound response.
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* @work: smb work containing response buffer
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*/
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static inline void *ksmbd_resp_buf_next(struct ksmbd_work *work)
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{
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return work->response_buf + work->next_smb2_rsp_hdr_off + 4;
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}
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/**
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* ksmbd_req_buf_next - Get next buffer on compound request.
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* @work: smb work containing response buffer
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*/
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static inline void *ksmbd_req_buf_next(struct ksmbd_work *work)
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{
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return work->request_buf + work->next_smb2_rcv_hdr_off + 4;
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}
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struct ksmbd_work *ksmbd_alloc_work_struct(void);
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void ksmbd_free_work_struct(struct ksmbd_work *work);
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void ksmbd_work_pool_destroy(void);
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int ksmbd_work_pool_init(void);
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int ksmbd_workqueue_init(void);
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void ksmbd_workqueue_destroy(void);
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bool ksmbd_queue_work(struct ksmbd_work *work);
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#endif /* __KSMBD_WORK_H__ */
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