From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/include/scsi/libiscsi_tcp.h | 136 +++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 kernel/include/scsi/libiscsi_tcp.h (limited to 'kernel/include/scsi/libiscsi_tcp.h') diff --git a/kernel/include/scsi/libiscsi_tcp.h b/kernel/include/scsi/libiscsi_tcp.h new file mode 100644 index 000000000..2a7aa75dd --- /dev/null +++ b/kernel/include/scsi/libiscsi_tcp.h @@ -0,0 +1,136 @@ +/* + * iSCSI over TCP/IP Data-Path lib + * + * Copyright (C) 2008 Mike Christie + * Copyright (C) 2008 Red Hat, Inc. All rights reserved. + * maintained by open-iscsi@googlegroups.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published + * by the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * See the file COPYING included with this distribution for more details. + */ + +#ifndef LIBISCSI_TCP_H +#define LIBISCSI_TCP_H + +#include + +struct iscsi_tcp_conn; +struct iscsi_segment; +struct sk_buff; +struct hash_desc; + +typedef int iscsi_segment_done_fn_t(struct iscsi_tcp_conn *, + struct iscsi_segment *); + +struct iscsi_segment { + unsigned char *data; + unsigned int size; + unsigned int copied; + unsigned int total_size; + unsigned int total_copied; + + struct hash_desc *hash; + unsigned char padbuf[ISCSI_PAD_LEN]; + unsigned char recv_digest[ISCSI_DIGEST_SIZE]; + unsigned char digest[ISCSI_DIGEST_SIZE]; + unsigned int digest_len; + + struct scatterlist *sg; + void *sg_mapped; + unsigned int sg_offset; + bool atomic_mapped; + + iscsi_segment_done_fn_t *done; +}; + +/* Socket connection receive helper */ +struct iscsi_tcp_recv { + struct iscsi_hdr *hdr; + struct iscsi_segment segment; + + /* Allocate buffer for BHS + AHS */ + uint32_t hdr_buf[64]; + + /* copied and flipped values */ + int datalen; +}; + +struct iscsi_tcp_conn { + struct iscsi_conn *iscsi_conn; + void *dd_data; + int stop_stage; /* conn_stop() flag: * + * stop to recover, * + * stop to terminate */ + /* control data */ + struct iscsi_tcp_recv in; /* TCP receive context */ + /* CRC32C (Rx) LLD should set this is they do not offload */ + struct hash_desc *rx_hash; +}; + +struct iscsi_tcp_task { + uint32_t exp_datasn; /* expected target's R2TSN/DataSN */ + int data_offset; + struct iscsi_r2t_info *r2t; /* in progress solict R2T */ + struct iscsi_pool r2tpool; + struct kfifo r2tqueue; + void *dd_data; + spinlock_t pool2queue; + spinlock_t queue2pool; +}; + +enum { + ISCSI_TCP_SEGMENT_DONE, /* curr seg has been processed */ + ISCSI_TCP_SKB_DONE, /* skb is out of data */ + ISCSI_TCP_CONN_ERR, /* iscsi layer has fired a conn err */ + ISCSI_TCP_SUSPENDED, /* conn is suspended */ +}; + +extern void iscsi_tcp_hdr_recv_prep(struct iscsi_tcp_conn *tcp_conn); +extern int iscsi_tcp_recv_skb(struct iscsi_conn *conn, struct sk_buff *skb, + unsigned int offset, bool offloaded, int *status); +extern void iscsi_tcp_cleanup_task(struct iscsi_task *task); +extern int iscsi_tcp_task_init(struct iscsi_task *task); +extern int iscsi_tcp_task_xmit(struct iscsi_task *task); + +/* segment helpers */ +extern int iscsi_tcp_recv_segment_is_hdr(struct iscsi_tcp_conn *tcp_conn); +extern int iscsi_tcp_segment_done(struct iscsi_tcp_conn *tcp_conn, + struct iscsi_segment *segment, int recv, + unsigned copied); +extern void iscsi_tcp_segment_unmap(struct iscsi_segment *segment); + +extern void iscsi_segment_init_linear(struct iscsi_segment *segment, + void *data, size_t size, + iscsi_segment_done_fn_t *done, + struct hash_desc *hash); +extern int +iscsi_segment_seek_sg(struct iscsi_segment *segment, + struct scatterlist *sg_list, unsigned int sg_count, + unsigned int offset, size_t size, + iscsi_segment_done_fn_t *done, struct hash_desc *hash); + +/* digest helpers */ +extern void iscsi_tcp_dgst_header(struct hash_desc *hash, const void *hdr, + size_t hdrlen, + unsigned char digest[ISCSI_DIGEST_SIZE]); +extern struct iscsi_cls_conn * +iscsi_tcp_conn_setup(struct iscsi_cls_session *cls_session, int dd_data_size, + uint32_t conn_idx); +extern void iscsi_tcp_conn_teardown(struct iscsi_cls_conn *cls_conn); + +/* misc helpers */ +extern int iscsi_tcp_r2tpool_alloc(struct iscsi_session *session); +extern void iscsi_tcp_r2tpool_free(struct iscsi_session *session); +extern int iscsi_tcp_set_max_r2t(struct iscsi_conn *conn, char *buf); +extern void iscsi_tcp_conn_get_stats(struct iscsi_cls_conn *cls_conn, + struct iscsi_stats *stats); +#endif /* LIBISCSI_TCP_H */ -- cgit 1.2.3-korg