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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* 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
*/
#ifndef LIBISCSI_TCP_H
#define LIBISCSI_TCP_H
#include <scsi/libiscsi.h>
struct iscsi_tcp_conn;
struct iscsi_segment;
struct sk_buff;
struct ahash_request;
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 ahash_request *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 ahash_request *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 ahash_request *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 ahash_request *hash);
/* digest helpers */
extern void iscsi_tcp_dgst_header(struct ahash_request *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 */
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| fc | Folder | 0755 |
|
|
| fc_frame.h | File | 7.03 KB | 0644 |
|
| fcoe_sysfs.h | File | 3.09 KB | 0644 |
|
| iscsi_if.h | File | 25.6 KB | 0644 |
|
| iscsi_proto.h | File | 15.54 KB | 0644 |
|
| iser.h | File | 2.34 KB | 0644 |
|
| libfc.h | File | 31.57 KB | 0644 |
|
| libfcoe.h | File | 13.83 KB | 0644 |
|
| libiscsi.h | File | 14.58 KB | 0644 |
|
| libiscsi_tcp.h | File | 3.8 KB | 0644 |
|
| libsas.h | File | 18.08 KB | 0644 |
|
| sas.h | File | 12.6 KB | 0644 |
|
| sas_ata.h | File | 2.08 KB | 0644 |
|
| scsi.h | File | 5.88 KB | 0644 |
|
| scsi_bsg_iscsi.h | File | 2.18 KB | 0644 |
|
| scsi_cmnd.h | File | 11.2 KB | 0644 |
|
| scsi_common.h | File | 2.68 KB | 0644 |
|
| scsi_dbg.h | File | 1.96 KB | 0644 |
|
| scsi_device.h | File | 25.14 KB | 0644 |
|
| scsi_devinfo.h | File | 3.9 KB | 0644 |
|
| scsi_dh.h | File | 2.54 KB | 0644 |
|
| scsi_driver.h | File | 1.14 KB | 0644 |
|
| scsi_eh.h | File | 1.63 KB | 0644 |
|
| scsi_host.h | File | 28.36 KB | 0644 |
|
| scsi_ioctl.h | File | 1.51 KB | 0644 |
|
| scsi_proto.h | File | 12.62 KB | 0644 |
|
| scsi_request.h | File | 620 B | 0644 |
|
| scsi_status.h | File | 3.09 KB | 0644 |
|
| scsi_tcq.h | File | 993 B | 0644 |
|
| scsi_transport.h | File | 2.55 KB | 0644 |
|
| scsi_transport_fc.h | File | 28.04 KB | 0644 |
|
| scsi_transport_iscsi.h | File | 17.28 KB | 0644 |
|
| scsi_transport_sas.h | File | 6.88 KB | 0644 |
|
| scsi_transport_spi.h | File | 6.53 KB | 0644 |
|
| scsi_transport_srp.h | File | 4.81 KB | 0644 |
|
| scsicam.h | File | 636 B | 0644 |
|
| sg.h | File | 14.81 KB | 0644 |
|
| srp.h | File | 6.86 KB | 0644 |
|
| viosrp.h | File | 5.41 KB | 0644 |
|