| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * iSCSI Initiator TCP Transport |
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| 4 | * Copyright (C) 2004 Dmitry Yusupov |
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| 5 | * Copyright (C) 2004 Alex Aizman |
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| 6 | * Copyright (C) 2005 - 2006 Mike Christie |
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| 7 | * Copyright (C) 2006 Red Hat, Inc. All rights reserved. |
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| 8 | * maintained by open-iscsi@googlegroups.com |
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| 9 | * |
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| 10 | * See the file COPYING included with this distribution for more details. |
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| 11 | */ |
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| 12 | |
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| 13 | #ifndef ISCSI_SW_TCP_H |
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| 14 | #define ISCSI_SW_TCP_H |
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| 15 | |
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| 16 | #include <scsi/libiscsi.h> |
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| 17 | #include <scsi/libiscsi_tcp.h> |
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| 18 | |
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| 19 | struct socket; |
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| 20 | struct iscsi_tcp_conn; |
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| 21 | |
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| 22 | /* Socket connection send helper */ |
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| 23 | struct iscsi_sw_tcp_send { |
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| 24 | struct iscsi_hdr *hdr; |
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| 25 | struct iscsi_segment segment; |
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| 26 | struct iscsi_segment data_segment; |
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| 27 | }; |
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| 28 | |
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| 29 | struct iscsi_sw_tcp_conn { |
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| 30 | struct socket *sock; |
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| 31 | /* Taken when accessing the sock from the netlink/sysfs interface */ |
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| 32 | struct mutex sock_lock; |
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| 33 | |
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| 34 | struct work_struct recvwork; |
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| 35 | bool queue_recv; |
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| 36 | |
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| 37 | struct iscsi_sw_tcp_send out; |
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| 38 | /* old values for socket callbacks */ |
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| 39 | void (*old_data_ready)(struct sock *); |
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| 40 | void (*old_state_change)(struct sock *); |
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| 41 | void (*old_write_space)(struct sock *); |
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| 42 | |
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| 43 | /* data and header digests */ |
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| 44 | u32 tx_crc; /* CRC32C (Tx) */ |
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| 45 | u32 rx_crc; /* CRC32C (Rx) */ |
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| 46 | |
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| 47 | /* MIB custom statistics */ |
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| 48 | uint32_t sendpage_failures_cnt; |
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| 49 | uint32_t discontiguous_hdr_cnt; |
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| 50 | }; |
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| 51 | |
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| 52 | struct iscsi_sw_tcp_host { |
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| 53 | struct iscsi_session *session; |
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| 54 | }; |
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| 55 | |
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| 56 | struct iscsi_sw_tcp_hdrbuf { |
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| 57 | struct iscsi_hdr hdrbuf; |
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| 58 | char hdrextbuf[ISCSI_MAX_AHS_SIZE + |
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| 59 | ISCSI_DIGEST_SIZE]; |
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| 60 | }; |
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| 61 | |
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| 62 | #endif /* ISCSI_SW_TCP_H */ |
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| 63 | |
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