1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2019 Samsung Electronics Co., Ltd. 4 */ 5 6 #ifndef __KSMBD_WORK_H__ 7 #define __KSMBD_WORK_H__ 8 9 #include <linux/ctype.h> 10 #include <linux/workqueue.h> 11 12 struct ksmbd_conn; 13 struct ksmbd_session; 14 struct ksmbd_tree_connect; 15 16 enum { 17 KSMBD_WORK_ACTIVE = 0, 18 KSMBD_WORK_CANCELLED, 19 KSMBD_WORK_CLOSED, 20 }; 21 22 /* one of these for every pending CIFS request at the connection */ 23 struct ksmbd_work { 24 /* Server corresponding to this mid */ 25 struct ksmbd_conn *conn; 26 struct ksmbd_session *sess; 27 struct ksmbd_tree_connect *tcon; 28 29 /* Pointer to received SMB header */ 30 void *request_buf; 31 /* Response buffer */ 32 void *response_buf; 33 34 /* Read data buffer */ 35 void *aux_payload_buf; 36 37 /* Next cmd hdr in compound req buf*/ 38 int next_smb2_rcv_hdr_off; 39 /* Next cmd hdr in compound rsp buf*/ 40 int next_smb2_rsp_hdr_off; 41 42 /* 43 * Current Local FID assigned compound response if SMB2 CREATE 44 * command is present in compound request 45 */ 46 u64 compound_fid; 47 u64 compound_pfid; 48 u64 compound_sid; 49 50 const struct cred *saved_cred; 51 52 /* Number of granted credits */ 53 unsigned int credits_granted; 54 55 /* response smb header size */ 56 unsigned int resp_hdr_sz; 57 unsigned int response_sz; 58 /* Read data count */ 59 unsigned int aux_payload_sz; 60 61 void *tr_buf; 62 63 unsigned char state; 64 /* Multiple responses for one request e.g. SMB ECHO */ 65 bool multiRsp:1; 66 /* No response for cancelled request */ 67 bool send_no_response:1; 68 /* Request is encrypted */ 69 bool encrypted:1; 70 /* Is this SYNC or ASYNC ksmbd_work */ 71 bool asynchronous:1; 72 bool need_invalidate_rkey:1; 73 74 unsigned int remote_key; 75 /* cancel works */ 76 int async_id; 77 void **cancel_argv; 78 void (*cancel_fn)(void **argv); 79 80 struct work_struct work; 81 /* List head at conn->requests */ 82 struct list_head request_entry; 83 /* List head at conn->async_requests */ 84 struct list_head async_request_entry; 85 struct list_head fp_entry; 86 struct list_head interim_entry; 87 }; 88 89 /** 90 * ksmbd_resp_buf_next - Get next buffer on compound response. 91 * @work: smb work containing response buffer 92 */ 93 static inline void *ksmbd_resp_buf_next(struct ksmbd_work *work) 94 { 95 return work->response_buf + work->next_smb2_rsp_hdr_off + 4; 96 } 97 98 /** 99 * ksmbd_req_buf_next - Get next buffer on compound request. 100 * @work: smb work containing response buffer 101 */ 102 static inline void *ksmbd_req_buf_next(struct ksmbd_work *work) 103 { 104 return work->request_buf + work->next_smb2_rcv_hdr_off + 4; 105 } 106 107 struct ksmbd_work *ksmbd_alloc_work_struct(void); 108 void ksmbd_free_work_struct(struct ksmbd_work *work); 109 110 void ksmbd_work_pool_destroy(void); 111 int ksmbd_work_pool_init(void); 112 113 int ksmbd_workqueue_init(void); 114 void ksmbd_workqueue_destroy(void); 115 bool ksmbd_queue_work(struct ksmbd_work *work); 116 117 #endif /* __KSMBD_WORK_H__ */ 118