1 #define TCM_VHOST_VERSION "v0.1"
2 #define TCM_VHOST_NAMELEN 256
3 #define TCM_VHOST_MAX_CDB_SIZE 32
6 /* Descriptor from vhost_get_vq_desc() for virt_queue segment */
8 /* virtio-scsi initiator task attribute */
10 /* virtio-scsi initiator data direction */
11 enum dma_data_direction tvc_data_direction
;
12 /* Expected data transfer length from virtio-scsi header */
14 /* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */
16 /* The number of scatterlists associated with this cmd */
18 /* Saved unpacked SCSI LUN for tcm_vhost_submission_work() */
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
;
26 /* Pointer to vhost_virtqueue for the cmd */
27 struct vhost_virtqueue
*tvc_vq
;
28 /* Pointer to vhost nexus memory */
29 struct tcm_vhost_nexus
*tvc_nexus
;
30 /* The TCM I/O descriptor that is accessed via container_of() */
31 struct se_cmd tvc_se_cmd
;
32 /* work item used for cmwq dispatch to tcm_vhost_submission_work() */
33 struct work_struct work
;
34 /* Copy of the incoming SCSI command descriptor block (CDB) */
35 unsigned char tvc_cdb
[TCM_VHOST_MAX_CDB_SIZE
];
36 /* Sense buffer that will be mapped into outgoing status */
37 unsigned char tvc_sense_buf
[TRANSPORT_SENSE_BUFFER
];
38 /* Completed commands list, serviced from vhost worker thread */
39 struct llist_node tvc_completion_list
;
42 struct tcm_vhost_nexus
{
43 /* Pointer to TCM session for I_T Nexus */
44 struct se_session
*tvn_se_sess
;
47 struct tcm_vhost_nacl
{
48 /* Binary World Wide unique Port Name for Vhost Initiator port */
50 /* ASCII formatted WWPN for Sas Initiator port */
51 char iport_name
[TCM_VHOST_NAMELEN
];
52 /* Returned by tcm_vhost_make_nodeacl() */
53 struct se_node_acl se_node_acl
;
56 struct tcm_vhost_tpg
{
57 /* Vhost port target portal group tag for TCM */
59 /* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */
60 int tv_tpg_port_count
;
61 /* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */
62 int tv_tpg_vhost_count
;
63 /* list for tcm_vhost_list */
64 struct list_head tv_tpg_list
;
65 /* Used to protect access for tpg_nexus */
66 struct mutex tv_tpg_mutex
;
67 /* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */
68 struct tcm_vhost_nexus
*tpg_nexus
;
69 /* Pointer back to tcm_vhost_tport */
70 struct tcm_vhost_tport
*tport
;
71 /* Returned by tcm_vhost_make_tpg() */
72 struct se_portal_group se_tpg
;
75 struct tcm_vhost_tport
{
76 /* SCSI protocol the tport is providing */
78 /* Binary World Wide unique Port Name for Vhost Target port */
80 /* ASCII formatted WWPN for Vhost Target port */
81 char tport_name
[TCM_VHOST_NAMELEN
];
82 /* Returned by tcm_vhost_make_tport() */
83 struct se_wwn tport_wwn
;
87 * As per request from MST, keep TCM_VHOST related ioctl defines out of
88 * linux/vhost.h (user-space) for now..
91 #include <linux/vhost.h>
94 * Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
96 * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
97 * RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage
98 * ABI Rev 1: January 2013. Ignore vhost_tpgt filed in struct vhost_scsi_target.
99 * All the targets under vhost_wwpn can be seen and used by guset.
102 #define VHOST_SCSI_ABI_VERSION 1
104 struct vhost_scsi_target
{
106 char vhost_wwpn
[TRANSPORT_IQN_LEN
];
107 unsigned short vhost_tpgt
;
108 unsigned short reserved
;
111 /* VHOST_SCSI specific defines */
112 #define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
113 #define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)
114 /* Changing this breaks userspace. */
115 #define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int)