mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:16:49 +07:00
6de7145ca3
Here TRANSPORT_IQN_LEN is 224, which is a multiple of 4.
Since vhost_tpgt is 2 bytes and abi_version is 4, the total size would
be 230. But gcc needs struct size be aligned to first field size, which
is 4 bytes, so it pads the structure by extra 2 bytes to the total of
232.
This padding is very undesirable in an ABI:
- it can not be initialized easily
- it can not be checked easily
- it can leak information between kernel and userspace
Simplest solution is probably just to make the padding
explicit.
(v2: Add check for zero'ed backend->reserved field for VHOST_SCSI_SET_ENDPOINT
and VHOST_SCSI_CLEAR_ENDPOINT ops as requested by MST)
Reported-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
#define TCM_VHOST_VERSION "v0.1"
|
|
#define TCM_VHOST_NAMELEN 256
|
|
#define TCM_VHOST_MAX_CDB_SIZE 32
|
|
|
|
struct tcm_vhost_cmd {
|
|
/* Descriptor from vhost_get_vq_desc() for virt_queue segment */
|
|
int tvc_vq_desc;
|
|
/* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */
|
|
u64 tvc_tag;
|
|
/* The number of scatterlists associated with this cmd */
|
|
u32 tvc_sgl_count;
|
|
/* Saved unpacked SCSI LUN for tcm_vhost_submission_work() */
|
|
u32 tvc_lun;
|
|
/* Pointer to the SGL formatted memory from virtio-scsi */
|
|
struct scatterlist *tvc_sgl;
|
|
/* Pointer to response */
|
|
struct virtio_scsi_cmd_resp __user *tvc_resp;
|
|
/* Pointer to vhost_scsi for our device */
|
|
struct vhost_scsi *tvc_vhost;
|
|
/* The TCM I/O descriptor that is accessed via container_of() */
|
|
struct se_cmd tvc_se_cmd;
|
|
/* work item used for cmwq dispatch to tcm_vhost_submission_work() */
|
|
struct work_struct work;
|
|
/* Copy of the incoming SCSI command descriptor block (CDB) */
|
|
unsigned char tvc_cdb[TCM_VHOST_MAX_CDB_SIZE];
|
|
/* Sense buffer that will be mapped into outgoing status */
|
|
unsigned char tvc_sense_buf[TRANSPORT_SENSE_BUFFER];
|
|
/* Completed commands list, serviced from vhost worker thread */
|
|
struct list_head tvc_completion_list;
|
|
};
|
|
|
|
struct tcm_vhost_nexus {
|
|
/* Pointer to TCM session for I_T Nexus */
|
|
struct se_session *tvn_se_sess;
|
|
};
|
|
|
|
struct tcm_vhost_nacl {
|
|
/* Binary World Wide unique Port Name for Vhost Initiator port */
|
|
u64 iport_wwpn;
|
|
/* ASCII formatted WWPN for Sas Initiator port */
|
|
char iport_name[TCM_VHOST_NAMELEN];
|
|
/* Returned by tcm_vhost_make_nodeacl() */
|
|
struct se_node_acl se_node_acl;
|
|
};
|
|
|
|
struct tcm_vhost_tpg {
|
|
/* Vhost port target portal group tag for TCM */
|
|
u16 tport_tpgt;
|
|
/* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */
|
|
int tv_tpg_port_count;
|
|
/* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */
|
|
int tv_tpg_vhost_count;
|
|
/* list for tcm_vhost_list */
|
|
struct list_head tv_tpg_list;
|
|
/* Used to protect access for tpg_nexus */
|
|
struct mutex tv_tpg_mutex;
|
|
/* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */
|
|
struct tcm_vhost_nexus *tpg_nexus;
|
|
/* Pointer back to tcm_vhost_tport */
|
|
struct tcm_vhost_tport *tport;
|
|
/* Returned by tcm_vhost_make_tpg() */
|
|
struct se_portal_group se_tpg;
|
|
};
|
|
|
|
struct tcm_vhost_tport {
|
|
/* SCSI protocol the tport is providing */
|
|
u8 tport_proto_id;
|
|
/* Binary World Wide unique Port Name for Vhost Target port */
|
|
u64 tport_wwpn;
|
|
/* ASCII formatted WWPN for Vhost Target port */
|
|
char tport_name[TCM_VHOST_NAMELEN];
|
|
/* Returned by tcm_vhost_make_tport() */
|
|
struct se_wwn tport_wwn;
|
|
};
|
|
|
|
/*
|
|
* As per request from MST, keep TCM_VHOST related ioctl defines out of
|
|
* linux/vhost.h (user-space) for now..
|
|
*/
|
|
|
|
#include <linux/vhost.h>
|
|
|
|
/*
|
|
* Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
|
|
*
|
|
* ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
|
|
* RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage
|
|
*/
|
|
|
|
#define VHOST_SCSI_ABI_VERSION 0
|
|
|
|
struct vhost_scsi_target {
|
|
int abi_version;
|
|
char vhost_wwpn[TRANSPORT_IQN_LEN];
|
|
unsigned short vhost_tpgt;
|
|
unsigned short reserved;
|
|
};
|
|
|
|
/* VHOST_SCSI specific defines */
|
|
#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
|
|
#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)
|
|
/* Changing this breaks userspace. */
|
|
#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int)
|