blob: 7e87c63ecbcd84aa38b89d0568b8007cfa6cdd83 [file] [log] [blame]
Nicholas Bellinger057cbf42012-07-18 14:31:32 -07001#define TCM_VHOST_VERSION "v0.1"
2#define TCM_VHOST_NAMELEN 256
3#define TCM_VHOST_MAX_CDB_SIZE 32
4
5struct tcm_vhost_cmd {
6 /* Descriptor from vhost_get_vq_desc() for virt_queue segment */
7 int tvc_vq_desc;
Nicholas Bellinger9f0abc12012-10-01 18:40:55 -07008 /* virtio-scsi initiator task attribute */
9 int tvc_task_attr;
10 /* virtio-scsi initiator data direction */
11 enum dma_data_direction tvc_data_direction;
12 /* Expected data transfer length from virtio-scsi header */
13 u32 tvc_exp_data_len;
Nicholas Bellinger057cbf42012-07-18 14:31:32 -070014 /* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */
15 u64 tvc_tag;
16 /* The number of scatterlists associated with this cmd */
17 u32 tvc_sgl_count;
18 /* Saved unpacked SCSI LUN for tcm_vhost_submission_work() */
19 u32 tvc_lun;
20 /* Pointer to the SGL formatted memory from virtio-scsi */
21 struct scatterlist *tvc_sgl;
22 /* Pointer to response */
23 struct virtio_scsi_cmd_resp __user *tvc_resp;
24 /* Pointer to vhost_scsi for our device */
25 struct vhost_scsi *tvc_vhost;
Nicholas Bellinger9f0abc12012-10-01 18:40:55 -070026 /* Pointer to vhost nexus memory */
27 struct tcm_vhost_nexus *tvc_nexus;
Nicholas Bellinger057cbf42012-07-18 14:31:32 -070028 /* The TCM I/O descriptor that is accessed via container_of() */
29 struct se_cmd tvc_se_cmd;
30 /* work item used for cmwq dispatch to tcm_vhost_submission_work() */
31 struct work_struct work;
32 /* Copy of the incoming SCSI command descriptor block (CDB) */
33 unsigned char tvc_cdb[TCM_VHOST_MAX_CDB_SIZE];
34 /* Sense buffer that will be mapped into outgoing status */
35 unsigned char tvc_sense_buf[TRANSPORT_SENSE_BUFFER];
36 /* Completed commands list, serviced from vhost worker thread */
37 struct list_head tvc_completion_list;
38};
39
40struct tcm_vhost_nexus {
41 /* Pointer to TCM session for I_T Nexus */
42 struct se_session *tvn_se_sess;
43};
44
45struct tcm_vhost_nacl {
46 /* Binary World Wide unique Port Name for Vhost Initiator port */
47 u64 iport_wwpn;
48 /* ASCII formatted WWPN for Sas Initiator port */
49 char iport_name[TCM_VHOST_NAMELEN];
50 /* Returned by tcm_vhost_make_nodeacl() */
51 struct se_node_acl se_node_acl;
52};
53
54struct tcm_vhost_tpg {
55 /* Vhost port target portal group tag for TCM */
56 u16 tport_tpgt;
57 /* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */
Nicholas Bellinger101998f2012-07-30 13:30:00 -070058 int tv_tpg_port_count;
59 /* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */
60 int tv_tpg_vhost_count;
Nicholas Bellinger057cbf42012-07-18 14:31:32 -070061 /* list for tcm_vhost_list */
62 struct list_head tv_tpg_list;
63 /* Used to protect access for tpg_nexus */
64 struct mutex tv_tpg_mutex;
65 /* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */
66 struct tcm_vhost_nexus *tpg_nexus;
67 /* Pointer back to tcm_vhost_tport */
68 struct tcm_vhost_tport *tport;
69 /* Returned by tcm_vhost_make_tpg() */
70 struct se_portal_group se_tpg;
71};
72
73struct tcm_vhost_tport {
74 /* SCSI protocol the tport is providing */
75 u8 tport_proto_id;
76 /* Binary World Wide unique Port Name for Vhost Target port */
77 u64 tport_wwpn;
78 /* ASCII formatted WWPN for Vhost Target port */
79 char tport_name[TCM_VHOST_NAMELEN];
80 /* Returned by tcm_vhost_make_tport() */
81 struct se_wwn tport_wwn;
82};
83
84/*
85 * As per request from MST, keep TCM_VHOST related ioctl defines out of
86 * linux/vhost.h (user-space) for now..
87 */
88
89#include <linux/vhost.h>
90
91/*
92 * Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
93 *
94 * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
95 * RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage
96 */
97
98#define VHOST_SCSI_ABI_VERSION 0
99
100struct vhost_scsi_target {
101 int abi_version;
Nicholas Bellinger5b7517f2012-08-16 18:56:34 -0700102 char vhost_wwpn[TRANSPORT_IQN_LEN];
Nicholas Bellinger057cbf42012-07-18 14:31:32 -0700103 unsigned short vhost_tpgt;
Michael S. Tsirkin6de71452012-08-18 15:44:09 -0700104 unsigned short reserved;
Nicholas Bellinger057cbf42012-07-18 14:31:32 -0700105};
106
107/* VHOST_SCSI specific defines */
108#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
109#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)
Nicholas Bellinger101998f2012-07-30 13:30:00 -0700110/* Changing this breaks userspace. */
111#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int)