iscsi_tcp.h 1.9 KB

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  1. /*
  2. * iSCSI Initiator TCP Transport
  3. * Copyright (C) 2004 Dmitry Yusupov
  4. * Copyright (C) 2004 Alex Aizman
  5. * Copyright (C) 2005 - 2006 Mike Christie
  6. * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
  7. * maintained by open-iscsi@googlegroups.com
  8. *
  9. * This program is free software; you can redistribute it and/or modify
  10. * it under the terms of the GNU General Public License as published
  11. * by the Free Software Foundation; either version 2 of the License, or
  12. * (at your option) any later version.
  13. *
  14. * This program is distributed in the hope that it will be useful, but
  15. * WITHOUT ANY WARRANTY; without even the implied warranty of
  16. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17. * General Public License for more details.
  18. *
  19. * See the file COPYING included with this distribution for more details.
  20. */
  21. #ifndef ISCSI_SW_TCP_H
  22. #define ISCSI_SW_TCP_H
  23. #include <scsi/libiscsi.h>
  24. #include <scsi/libiscsi_tcp.h>
  25. struct socket;
  26. struct iscsi_tcp_conn;
  27. /* Socket connection send helper */
  28. struct iscsi_sw_tcp_send {
  29. struct iscsi_hdr *hdr;
  30. struct iscsi_segment segment;
  31. struct iscsi_segment data_segment;
  32. };
  33. struct iscsi_sw_tcp_conn {
  34. struct socket *sock;
  35. struct iscsi_sw_tcp_send out;
  36. /* old values for socket callbacks */
  37. void (*old_data_ready)(struct sock *, int);
  38. void (*old_state_change)(struct sock *);
  39. void (*old_write_space)(struct sock *);
  40. /* data and header digests */
  41. struct hash_desc tx_hash; /* CRC32C (Tx) */
  42. struct hash_desc rx_hash; /* CRC32C (Rx) */
  43. /* MIB custom statistics */
  44. uint32_t sendpage_failures_cnt;
  45. uint32_t discontiguous_hdr_cnt;
  46. ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
  47. };
  48. struct iscsi_sw_tcp_host {
  49. struct iscsi_session *session;
  50. };
  51. struct iscsi_sw_tcp_hdrbuf {
  52. struct iscsi_hdr hdrbuf;
  53. char hdrextbuf[ISCSI_MAX_AHS_SIZE +
  54. ISCSI_DIGEST_SIZE];
  55. };
  56. #endif /* ISCSI_SW_TCP_H */