From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch adds initial support for using the Linux BSG interface with write/read vectored
AIO as a QEMU backstore (SCSIDeviceInfo) with hw/scsi-bus.c compatible HBA emulation.
So far it has been tested with x86_64 host and guest using hw/megasas.c and TCM_Loop LLD
Port LUNs. Because this path uses struct iovec for struct sg_io_v4->d[out,in]_xferp payloads,
which currently requires a patch to linux/block/bsg.c:bsg_map_hdr() in order to setup the
user -> kernel iovecs. This also will only currently work with paired user/kernel
(eg: 64bit user / 64bit kernel) because of different pointer sizes in struct iovec->iov_base.
There are also two FIXMEs in hw/scsi-bsg.c:bsg_generic_initfn() related to extraction of
SCSI LUN and device type values using BSG and required by QEMU-KVM.
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
---
Makefile.objs | 2 +-
hw/scsi-bsg.c | 588 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 589 insertions(+), 1 deletions(-)
create mode 100644 hw/scsi-bsg.c
diff --git a/Makefile.objs b/Makefile.objs
index 188d617..c4fcb72 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -197,7 +197,7 @@ hw-obj-$(CONFIG_IDE_CMD646) += ide/cmd646.o
hw-obj-$(CONFIG_IDE_MACIO) += ide/macio.o
# SCSI layer
-hw-obj-y += scsi-disk.o scsi-generic.o
+hw-obj-y += scsi-disk.o scsi-generic.o scsi-bsg.o
hw-obj-y += lsi53c895a.o megasas.o
hw-obj-$(CONFIG_ESP) += esp.o
diff --git a/hw/scsi-bsg.c b/hw/scsi-bsg.c
new file mode 100644
index 0000000..fc76b76
--- /dev/null
+++ b/hw/scsi-bsg.c
@@ -0,0 +1,588 @@
+/*
+ * block layer implementation of the sg v4 interface for Linux hosts
+ *
+ * Copyright (c) 2010 Rising Tide Systems
+ * Written by Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
+ *
+ * Based on hw/scsi-generic code by Laurent Vivier, Paul Brook, and Fabrice Bellard
+ *
+ * This code is licenced under the LGPL.
+ */
+
+#include "qemu-common.h"
+#include "qemu-error.h"
+#include "block.h"
+#include "scsi.h"
+#include "dma.h"
+#include "block/raw-posix-aio.h"
+
+#ifdef __linux__
+
+#define DEBUG_BSG
+#undef DEBUG_BSG_IO
+#undef DEBUG_BSG_MAP
+
+#ifdef DEBUG_BSG
+#define DPRINTF(fmt, ...) \
+do { printf("scsi-bsg: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) do {} while(0)
+#endif
+
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "scsi-bsg: " fmt , ## __VA_ARGS__); } while (0)
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+#include <scsi/sg.h>
+#include <linux/bsg.h>
+#include "scsi-defs.h"
+
+#define SCSI_SENSE_BUF_SIZE 96
+
+#define SG_ERR_DRIVER_TIMEOUT 0x06
+#define SG_ERR_DRIVER_SENSE 0x08
+
+#ifndef MAX_UINT
+#define MAX_UINT ((unsigned int)-1)
+#endif
+
+typedef struct SCSIBSGState SCSIBSGState;
+
+typedef struct SCSIBSGReq {
+ SCSIRequest req;
+ uint8_t *buf;
+ int buflen;
+ QEMUIOVector iov;
+ QEMUIOVector aio_iov;
+ struct sg_io_v4 bsg_hdr;
+} SCSIBSGReq;
+
+struct SCSIBSGState {
+ SCSIDevice qdev;
+ BlockDriverState *bs;
+ int lun;
+ int driver_status;
+ uint8_t sensebuf[SCSI_SENSE_BUF_SIZE];
+ uint8_t senselen;
+};
+
+static int bsg_read(int fd, void *p_read, int to_read)
+{
+ int err;
+
+ while (to_read > 0) {
+ err = read(fd, p_read, to_read);
+ if (err >= 0) {
+ to_read -= err;
+ p_read += err;
+ } else if (errno == EINTR)
+ continue;
+ else {
+ printf("bsg device %d read failed, errno: %d\n",
+ fd, errno);
+ return errno;
+ }
+ }
+ return 0;
+}
+
+static SCSIBSGReq *bsg_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
+{
+ SCSIRequest *req;
+ SCSIBSGReq *r;
+
+ req = scsi_req_alloc(sizeof(SCSIBSGReq), d, tag, lun);
+ r = DO_UPCAST(SCSIBSGReq, req, req);
+ qemu_iovec_init(&r->iov, 1);
+ qemu_iovec_init(&r->aio_iov, 1);
+ return r;
+}
+
+static void bsg_remove_request(SCSIBSGReq *r)
+{
+ qemu_free(r->buf);
+ qemu_iovec_destroy(&r->iov);
+ qemu_iovec_destroy(&r->aio_iov);
+ scsi_req_free(&r->req);
+}
+
+static void bsg_command_complete(void *opaque, int ret)
+{
+ SCSIBSGReq *r = (SCSIBSGReq *)opaque;
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, r->req.dev);
+
+ s->driver_status = r->bsg_hdr.driver_status;
+ if (s->driver_status)
+ s->senselen = SCSI_SENSE_BUF_SIZE;
+
+ if (ret != 0) {
+ scsi_req_print(&r->req);
+ fprintf(stderr, "%s: ret %d (%s)\n", __FUNCTION__,
+ ret, strerror(-ret));
+ s->senselen = scsi_build_sense(SENSE_CODE(INVALID_FIELD),
+ s->sensebuf, SCSI_SENSE_BUF_SIZE, 0);
+ s->driver_status = SG_ERR_DRIVER_SENSE;
+ r->req.status = CHECK_CONDITION;
+ } else {
+ if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
+ scsi_req_print(&r->req);
+ fprintf(stderr, "%s: timeout\n", __FUNCTION__);
+ r->req.status = BUSY << 1;
+ } else if (r->bsg_hdr.device_status) {
+ r->req.status = r->bsg_hdr.device_status;
+ } else if (s->driver_status & SG_ERR_DRIVER_SENSE) {
+ scsi_req_print(&r->req);
+ fprintf(stderr, "%s: driver sense\n", __FUNCTION__);
+ r->req.status = CHECK_CONDITION << 1;
+ } else {
+ r->req.status = GOOD << 1;
+ }
+ }
+#ifdef DEBUG_BSG_IO
+ DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
+ r, r->req.tag, r->req.status);
+#endif
+ scsi_req_complete(&r->req);
+}
+
+static int bsg_execute_command_run(SCSIBSGReq *r,
+ BlockDriverCompletionFunc *complete)
+{
+ BlockDriverState *bdrv = r->req.dev->conf.dinfo->bdrv;
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, r->req.dev);
+ /*
+ * Following linux/include/linux/bsg.h
+ */
+ /* [i] 'Q' to differentiate from v3 */
+ r->bsg_hdr.guard = 'Q';
+ r->bsg_hdr.protocol = BSG_PROTOCOL_SCSI;
+ r->bsg_hdr.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
+ r->bsg_hdr.request_len = r->req.cmd.len;
+ r->bsg_hdr.request = (unsigned long)r->req.cmd.buf;
+ r->bsg_hdr.max_response_len = sizeof(s->sensebuf);
+ /* SCSI: (auto)sense data */
+ r->bsg_hdr.response = (unsigned long)s->sensebuf;
+ /* Unlimited timeout */
+ r->bsg_hdr.timeout = MAX_UINT;
+ /* [i->o] unused internally */
+ r->bsg_hdr.usr_ptr = (unsigned long)r;
+ /* Bsg does Q_AT_HEAD by default */
+ r->bsg_hdr.flags |= BSG_FLAG_Q_AT_TAIL;
+
+ qemu_iovec_reset(&r->aio_iov);
+ qemu_iovec_add(&r->aio_iov, &r->bsg_hdr, sizeof(r->bsg_hdr));
+
+ r->req.aiocb = paio_submit_len(bdrv, bdrv->fd, 0, &r->aio_iov,
+ sizeof(r->bsg_hdr), complete, r, QEMU_AIO_WRITE);
+ if (r->req.aiocb == NULL) {
+ BADF("execute_command: paio_submit_len() failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int bsg_execute_command_buf(SCSIBSGReq *r,
+ BlockDriverCompletionFunc *complete,
+ uint8_t *buf, uint32_t buflen)
+{
+ if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ r->bsg_hdr.dout_xferp = (unsigned long)buf;
+ r->bsg_hdr.dout_xfer_len = buflen;
+ } else if (r->req.cmd.mode == SCSI_XFER_FROM_DEV) {
+ r->bsg_hdr.din_xferp = (unsigned long)buf;
+ r->bsg_hdr.din_xfer_len = buflen;
+ }
+#ifdef DEBUG_BSG_IO
+ DPRINTF("execute BUF: %p, dxfer_len %u\n", buf, buflen);
+#endif
+ return bsg_execute_command_run(r, complete);
+}
+
+static int bsg_execute_command_iov(SCSIBSGReq *r,
+ BlockDriverCompletionFunc *complete,
+ QEMUIOVector *iov)
+{
+ if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ r->bsg_hdr.dout_iovec_count = iov->niov;
+ r->bsg_hdr.dout_xferp = (unsigned long)iov->iov;
+ r->bsg_hdr.dout_xfer_len = iov->size;
+ } else if (r->req.cmd.mode == SCSI_XFER_FROM_DEV) {
+ r->bsg_hdr.din_iovec_count = iov->niov;
+ r->bsg_hdr.din_xferp = (unsigned long)iov->iov;
+ r->bsg_hdr.din_xfer_len = iov->size;
+ }
+#ifdef DEBUG_BSG_IO
+ DPRINTF("execute IOV: iovec_count: %u, iov: %p, size: %u\n",
+ iov->niov, iov->iov, (unsigned int)iov->size);
+#endif
+ return bsg_execute_command_run(r, complete);
+}
+
+static void bsg_write_complete(void *opaque, int ret)
+{
+ SCSIBSGReq *r = (SCSIBSGReq *)opaque;
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, r->req.dev);
+#ifdef DEBUG_BSG_IO
+ DPRINTF("bsg_write_complete() ret = %d\n", ret);
+#endif
+ if (ret) {
+ DPRINTF("IO error\n");
+ bsg_command_complete(r, ret);
+ return;
+ }
+ /*
+ * Copied from hw/scsi-generic.c:scsi_write_complete(), is this still
+ * necessary for BSG..?
+ */
+ if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
+ s->qdev.type == TYPE_TAPE) {
+ s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
+ DPRINTF("block size %d\n", s->qdev.blocksize);
+ }
+
+ bsg_command_complete(r, ret);
+}
+
+static void bsg_req_fixup(SCSIRequest *req)
+{
+ return;
+}
+
+static int bsg_get_blocksize(BlockDriverState *bdrv)
+{
+ uint8_t cmd[10];
+ uint8_t buf[8];
+ uint8_t sensebuf[8];
+ struct sg_io_v4 bsg_hdr;
+ int ret;
+
+ memset(cmd, 0, sizeof(cmd));
+ memset(buf, 0, sizeof(buf));
+ cmd[0] = READ_CAPACITY;
+
+ memset(&bsg_hdr, 0, sizeof(bsg_hdr));
+ bsg_hdr.guard = 'Q';
+ bsg_hdr.protocol = BSG_PROTOCOL_SCSI;
+ bsg_hdr.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
+ bsg_hdr.request_len = sizeof(cmd);
+ bsg_hdr.request = (unsigned long)cmd;
+ bsg_hdr.din_xfer_len = sizeof(buf);
+ bsg_hdr.din_xferp = (unsigned long)buf;
+ bsg_hdr.max_response_len = sizeof(sensebuf);
+ bsg_hdr.response = (unsigned long)sensebuf;
+ bsg_hdr.timeout = 6000; /* XXX */
+
+ ret = bdrv_ioctl(bdrv, SG_IO, (void *)&bsg_hdr);
+ if (ret < 0)
+ return -1;
+
+ return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
+}
+
+static int bsg_get_stream_blocksize(BlockDriverState *bdrv)
+{
+ uint8_t cmd[6];
+ uint8_t buf[12];
+ uint8_t sensebuf[8];
+ struct sg_io_v4 bsg_hdr;
+ int ret;
+
+ memset(cmd, 0, sizeof(cmd));
+ memset(buf, 0, sizeof(buf));
+ cmd[0] = MODE_SENSE;
+ cmd[4] = sizeof(buf);
+
+ memset(&bsg_hdr, 0, sizeof(bsg_hdr));
+ bsg_hdr.guard = 'Q';
+ bsg_hdr.protocol = BSG_PROTOCOL_SCSI;
+ bsg_hdr.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
+ bsg_hdr.request_len = sizeof(cmd);
+ bsg_hdr.request = (unsigned long)cmd;
+ bsg_hdr.din_xfer_len = sizeof(buf);
+ bsg_hdr.din_xferp = (unsigned long)buf;
+ bsg_hdr.max_response_len = sizeof(sensebuf);
+ bsg_hdr.response = (unsigned long)sensebuf;
+ bsg_hdr.timeout = 6000; /* XXX */
+
+ ret = bdrv_ioctl(bdrv, SG_IO, (void *)&bsg_hdr);
+ if (ret < 0)
+ return -1;
+
+ return (buf[9] << 16) | (buf[10] << 8) | buf[11];
+}
+
+static void bsg_destroy(SCSIDevice *d)
+{
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, d);
+ SCSIBSGReq *r;
+
+ while (!QTAILQ_EMPTY(&s->qdev.requests)) {
+ r = DO_UPCAST(SCSIBSGReq, req, QTAILQ_FIRST(&s->qdev.requests));
+ bsg_remove_request(r);
+ }
+ drive_uninit(s->qdev.conf.dinfo);
+}
+
+struct scsi_idlun {
+ uint32_t dev_id;
+ uint32_t host_unique_id;
+};
+
+static int bsg_generic_initfn(SCSIDevice *dev)
+{
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, dev);
+
+ if (!s->qdev.conf.dinfo || !s->qdev.conf.dinfo->bdrv) {
+ error_report("scsi-bsg: drive property not set");
+ return -1;
+ }
+ s->bs = s->qdev.conf.dinfo->bdrv;
+
+ /* check we are really using a /dev/bsg/ * file */
+ if (!bdrv_is_bsg(s->bs)) {
+ error_report("scsi-bsg: not BSG*");
+ return -1;
+ }
+#if 0
+ /* get LUN of the BSG */
+ if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) {
+ error_report("scsi-bsg: SG_GET_SCSI_ID ioctl failed");
+ return -1;
+ }
+#endif
+// FIXME: Get SCSI lun from BSG
+ s->lun = 0;
+// FIXME: Get SCSI device type from BSG INQUIRY
+ s->qdev.type = TYPE_DISK;
+ DPRINTF("LUN %d\n", s->lun);
+ DPRINTF("device type %d\n", s->qdev.type);
+
+ if (s->qdev.type == TYPE_TAPE) {
+ s->qdev.blocksize = bsg_get_stream_blocksize(s->bs);
+ if (s->qdev.blocksize == -1)
+ s->qdev.blocksize = 0;
+ } else {
+ s->qdev.blocksize = bsg_get_blocksize(s->bs);
+ /* removable media returns 0 if not present */
+ if (s->qdev.blocksize <= 0) {
+ if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
+ s->qdev.blocksize = 2048;
+ else
+ s->qdev.blocksize = 512;
+ }
+ }
+ DPRINTF("block size %d\n", s->qdev.blocksize);
+ s->driver_status = 0;
+ memset(s->sensebuf, 0, sizeof(s->sensebuf));
+ return 0;
+}
+
+static void bsg_generic_unmap(SCSIBSGReq *r)
+{
+ int is_write = !scsi_req_is_write(&r->req);
+ int i;
+
+ for (i = 0; i < r->iov.niov; i++) {
+ cpu_physical_memory_unmap(r->iov.iov[i].iov_base,
+ r->iov.iov[i].iov_len, is_write,
+ r->iov.iov[i].iov_len);
+ }
+ qemu_iovec_reset(&r->iov);
+}
+
+static int bsg_generic_map(SCSIBSGReq *r, QEMUSGList *sg)
+{
+ int is_write = !scsi_req_is_write(&r->req);
+ target_phys_addr_t cur_addr, cur_len, cur_offset = 0;
+ void *mem;
+ int i;
+
+ qemu_iovec_reset(&r->iov);
+ for (i = 0; i < sg->nsg;) {
+ cur_addr = sg->sg[i].base + cur_offset;
+ cur_len = sg->sg[i].len - cur_offset;
+#ifdef DEBUG_BSG_MAP
+ DPRINTF("Using cur_addr: 0x%016lx cur_len: 0x%016lx\n",
+ (long unsigned int)cur_addr, (long unsigned int)cur_len);
+#endif
+ mem = cpu_physical_memory_map(cur_addr, &cur_len, is_write);
+ if (!mem)
+ goto err;
+#ifdef DEBUG_BSG_MAP
+ DPRINTF("Adding iovec for mem: %p len: 0x%016lx\n", mem,
+ (long unsigned int)cur_len);
+#endif
+ qemu_iovec_add(&r->iov, mem, cur_len);
+
+ cur_offset += cur_len;
+ if (cur_offset == sg->sg[i].len) {
+ cur_offset = 0;
+ i++;
+ }
+ }
+
+ return 0;
+
+err:
+ bsg_generic_unmap(r);
+ return -1;
+}
+
+static SCSIRequest *bsg_generic_req_get(SCSIDevice *d, uint32_t tag, int lun)
+{
+ SCSIBSGReq *r;
+
+ r = bsg_new_request(d, tag, lun);
+ return &r->req;
+}
+
+static void bsg_generic_req_cb(void *opaque, int ret)
+{
+ SCSIRequest *req = opaque;
+ SCSIBSGReq *r = DO_UPCAST(SCSIBSGReq, req, req);
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, r->req.dev);
+ BlockDriverCompletionFunc *complete;
+ struct sg_io_v4 io_hdr;
+ int err;
+
+ req->aiocb = NULL;
+
+ memset(&io_hdr, 0, sizeof(io_hdr));
+ /* [i] 'Q' to differentiate from v3 */
+ io_hdr.guard = 'Q';
+
+ err = bsg_read(s->bs->fd, &io_hdr, sizeof(io_hdr));
+ if (err) {
+ printf("bsg_read() failed with ret: %d\n", err);
+ return;
+ }
+
+ if (r->iov.niov)
+ bsg_generic_unmap(r);
+
+ if (scsi_req_is_write(req)) {
+ req->xferlen = r->bsg_hdr.dout_xfer_len;
+ complete = bsg_write_complete;
+ } else {
+ req->xferlen = r->bsg_hdr.din_xfer_len;
+ complete = bsg_command_complete;
+ }
+ complete(opaque, ret);
+}
+
+static int bsg_generic_req_common(SCSIRequest *req, uint8_t *buffer)
+{
+ SCSIBSGReq *r = DO_UPCAST(SCSIBSGReq, req, req);
+ SCSIBSGState *s = DO_UPCAST(SCSIBSGState, qdev, r->req.dev);
+
+ bsg_req_fixup(&r->req);
+ if (req->cmd.buf[0] != REQUEST_SENSE &&
+ (req->lun != s->lun || (req->cmd.buf[1] >> 5) != s->lun)) {
+
+ DPRINTF("Unimplemented LUN %d\n",
+ req->lun ? req->lun : req->cmd.buf[1] >> 5);
+ s->senselen = scsi_build_sense(SENSE_CODE(LUN_NOT_SUPPORTED),
+ s->sensebuf, SCSI_SENSE_BUF_SIZE, 0);
+ s->driver_status = SG_ERR_DRIVER_SENSE;
+ req->status = CHECK_CONDITION << 1;
+ return 1;
+ }
+ if (r->req.cmd.buf[0] == REQUEST_SENSE &&
+ s->driver_status & SG_ERR_DRIVER_SENSE) {
+ req->xferlen = MIN(req->cmd.xfer, s->senselen);
+ memcpy(buffer, s->sensebuf, req->xferlen);
+ DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
+ DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
+ buffer[0], buffer[1], buffer[2], buffer[3],
+ buffer[4], buffer[5], buffer[6], buffer[7]);
+ req->status = GOOD;
+ return 1;
+ }
+ return 0;
+}
+
+static int bsg_generic_req_buf(SCSIRequest *req, uint8_t *buffer)
+{
+ SCSIBSGReq *r = DO_UPCAST(SCSIBSGReq, req, req);
+ int handled, ret;
+
+ handled = bsg_generic_req_common(req, buffer);
+ if (handled) {
+ scsi_req_complete(req);
+ return 0;
+ }
+
+ req->xferlen = req->cmd.xfer;
+ ret = bsg_execute_command_buf(r, bsg_generic_req_cb, buffer, req->xferlen);
+ if (ret == -1) {
+ bsg_command_complete(r, -EINVAL);
+ }
+ return 0;
+}
+
+static int bsg_generic_req_sgl(SCSIRequest *req, QEMUSGList *sg)
+{
+ SCSIBSGReq *r = DO_UPCAST(SCSIBSGReq, req, req);
+ int handled, ret;
+
+ if (bsg_generic_map(r, sg) != 0) {
+ /* Hmm ... */
+ abort();
+ }
+ handled = bsg_generic_req_common(req, r->iov.iov[0].iov_base);
+ if (handled) {
+ bsg_generic_unmap(r);
+ scsi_req_complete(req);
+ return 0;
+ }
+
+ req->xferlen = req->cmd.xfer;
+ ret = bsg_execute_command_iov(r, bsg_generic_req_cb, &r->iov);
+ if (ret == -1) {
+ bsg_generic_unmap(r);
+ bsg_command_complete(r, -EINVAL);
+ }
+ return 0;
+}
+
+static void bsg_generic_req_put(SCSIRequest *req)
+{
+ SCSIBSGReq *r = DO_UPCAST(SCSIBSGReq, req, req);
+
+ if (r->req.aiocb) {
+ bdrv_aio_cancel(r->req.aiocb);
+ }
+ bsg_remove_request(r);
+}
+
+static SCSIDeviceInfo bsg_info = {
+ .qdev.name = "scsi-bsg",
+ .qdev.desc = "pass through block layer scsi generic (/dev/bsg/*)",
+ .qdev.size = sizeof(SCSIBSGState),
+ .init = bsg_generic_initfn,
+ .destroy = bsg_destroy,
+
+ /* new */
+ .request_get = bsg_generic_req_get,
+ .request_buf = bsg_generic_req_buf,
+ .request_sgl = bsg_generic_req_sgl,
+ .request_put = bsg_generic_req_put,
+
+ .qdev.props = (Property[]) {
+ DEFINE_BLOCK_PROPERTIES(SCSIBSGState, qdev.conf),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static void bsg_register_devices(void)
+{
+ scsi_qdev_register(&bsg_info);
+}
+device_init(bsg_register_devices)
+
+#endif /* __linux__ */
--
1.5.6.5
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