@@ -58,6 +58,7 @@ struct XenBlockDataPlane {
int requests_inflight;
unsigned int max_requests;
BlockBackend *blk;
+ unsigned int sector_size;
QEMUBH *bh;
IOThread *iothread;
AioContext *ctx;
@@ -167,7 +168,7 @@ static int xen_block_parse_request(XenBlockRequest *request)
goto err;
}
- request->start = request->req.sector_number * XEN_BLKIF_SECTOR_SIZE;
+ request->start = request->req.sector_number * dataplane->sector_size;
for (i = 0; i < request->req.nr_segments; i++) {
if (i == BLKIF_MAX_SEGMENTS_PER_REQUEST) {
error_report("error: nr_segments too big");
@@ -177,14 +178,14 @@ static int xen_block_parse_request(XenBlockRequest *request)
error_report("error: first > last sector");
goto err;
}
- if (request->req.seg[i].last_sect * XEN_BLKIF_SECTOR_SIZE >=
+ if (request->req.seg[i].last_sect * dataplane->sector_size >=
XC_PAGE_SIZE) {
error_report("error: page crossing");
goto err;
}
len = (request->req.seg[i].last_sect -
- request->req.seg[i].first_sect + 1) * XEN_BLKIF_SECTOR_SIZE;
+ request->req.seg[i].first_sect + 1) * dataplane->sector_size;
request->size += len;
}
if (request->start + request->size > blk_getlength(dataplane->blk)) {
@@ -218,17 +219,17 @@ static int xen_block_copy_request(XenBlockRequest *request)
if (to_domain) {
segs[i].dest.foreign.ref = request->req.seg[i].gref;
segs[i].dest.foreign.offset = request->req.seg[i].first_sect *
- XEN_BLKIF_SECTOR_SIZE;
+ dataplane->sector_size;
segs[i].source.virt = virt;
} else {
segs[i].source.foreign.ref = request->req.seg[i].gref;
segs[i].source.foreign.offset = request->req.seg[i].first_sect *
- XEN_BLKIF_SECTOR_SIZE;
+ dataplane->sector_size;
segs[i].dest.virt = virt;
}
segs[i].len = (request->req.seg[i].last_sect -
request->req.seg[i].first_sect + 1) *
- XEN_BLKIF_SECTOR_SIZE;
+ dataplane->sector_size;
virt += segs[i].len;
}
@@ -336,12 +337,12 @@ static bool xen_block_split_discard(XenBlockRequest *request,
/* Wrap around, or overflowing byte limit? */
if (sec_start + sec_count < sec_count ||
- sec_start + sec_count > INT64_MAX / XEN_BLKIF_SECTOR_SIZE) {
+ sec_start + sec_count > INT64_MAX / dataplane->sector_size) {
return false;
}
- byte_offset = sec_start * XEN_BLKIF_SECTOR_SIZE;
- byte_remaining = sec_count * XEN_BLKIF_SECTOR_SIZE;
+ byte_offset = sec_start * dataplane->sector_size;
+ byte_remaining = sec_count * dataplane->sector_size;
do {
byte_chunk = byte_remaining > BDRV_REQUEST_MAX_BYTES ?
@@ -625,13 +626,15 @@ static void xen_block_dataplane_event(void *opaque)
}
XenBlockDataPlane *xen_block_dataplane_create(XenDevice *xendev,
- BlockConf *conf,
+ BlockBackend *blk,
+ unsigned int sector_size,
IOThread *iothread)
{
XenBlockDataPlane *dataplane = g_new0(XenBlockDataPlane, 1);
dataplane->xendev = xendev;
- dataplane->blk = conf->blk;
+ dataplane->blk = blk;
+ dataplane->sector_size = sector_size;
QLIST_INIT(&dataplane->inflight);
QLIST_INIT(&dataplane->freelist);
@@ -15,7 +15,8 @@
typedef struct XenBlockDataPlane XenBlockDataPlane;
XenBlockDataPlane *xen_block_dataplane_create(XenDevice *xendev,
- BlockConf *conf,
+ BlockBackend *blk,
+ unsigned int sector_size,
IOThread *iothread);
void xen_block_dataplane_destroy(XenBlockDataPlane *dataplane);
void xen_block_dataplane_start(XenBlockDataPlane *dataplane,
@@ -52,11 +52,25 @@ static void xen_block_connect(XenDevice *xendev, Error **errp)
XenBlockDevice *blockdev = XEN_BLOCK_DEVICE(xendev);
const char *type = object_get_typename(OBJECT(blockdev));
XenBlockVdev *vdev = &blockdev->props.vdev;
+ BlockConf *conf = &blockdev->props.conf;
+ unsigned int feature_large_sector_size;
unsigned int order, nr_ring_ref, *ring_ref, event_channel, protocol;
char *str;
trace_xen_block_connect(type, vdev->disk, vdev->partition);
+ if (xen_device_frontend_scanf(xendev, "feature-large-sector-size", "%u",
+ &feature_large_sector_size) != 1) {
+ feature_large_sector_size = 0;
+ }
+
+ if (feature_large_sector_size != 1 &&
+ conf->logical_block_size != XEN_BLKIF_SECTOR_SIZE) {
+ error_setg(errp, "logical_block_size != %u not supported by frontend",
+ XEN_BLKIF_SECTOR_SIZE);
+ return;
+ }
+
if (xen_device_frontend_scanf(xendev, "ring-page-order", "%u",
&order) != 1) {
nr_ring_ref = 1;
@@ -150,7 +164,7 @@ static void xen_block_set_size(XenBlockDevice *blockdev)
const char *type = object_get_typename(OBJECT(blockdev));
XenBlockVdev *vdev = &blockdev->props.vdev;
BlockConf *conf = &blockdev->props.conf;
- int64_t sectors = blk_getlength(conf->blk) / XEN_BLKIF_SECTOR_SIZE;
+ int64_t sectors = blk_getlength(conf->blk) / conf->logical_block_size;
XenDevice *xendev = XEN_DEVICE(blockdev);
trace_xen_block_size(type, vdev->disk, vdev->partition, sectors);
@@ -185,6 +199,7 @@ static void xen_block_realize(XenDevice *xendev, Error **errp)
const char *type = object_get_typename(OBJECT(blockdev));
XenBlockVdev *vdev = &blockdev->props.vdev;
BlockConf *conf = &blockdev->props.conf;
+ BlockBackend *blk = conf->blk;
Error *local_err = NULL;
if (vdev->type == XEN_BLOCK_VDEV_TYPE_INVALID) {
@@ -206,8 +221,8 @@ static void xen_block_realize(XenDevice *xendev, Error **errp)
* The blkif protocol does not deal with removable media, so it must
* always be present, even for CDRom devices.
*/
- assert(conf->blk);
- if (!blk_is_inserted(conf->blk)) {
+ assert(blk);
+ if (!blk_is_inserted(blk)) {
error_setg(errp, "device needs media, but drive is empty");
return;
}
@@ -224,26 +239,20 @@ static void xen_block_realize(XenDevice *xendev, Error **errp)
blkconf_blocksizes(conf);
- if (conf->logical_block_size != XEN_BLKIF_SECTOR_SIZE) {
- error_setg(errp, "logical_block_size != %u not supported",
- XEN_BLKIF_SECTOR_SIZE);
- return;
- }
-
if (conf->logical_block_size > conf->physical_block_size) {
error_setg(
errp, "logical_block_size > physical_block_size not supported");
return;
}
- blk_set_dev_ops(conf->blk, &xen_block_dev_ops, blockdev);
- blk_set_guest_block_size(conf->blk, conf->logical_block_size);
+ blk_set_dev_ops(blk, &xen_block_dev_ops, blockdev);
+ blk_set_guest_block_size(blk, conf->logical_block_size);
if (conf->discard_granularity == -1) {
conf->discard_granularity = conf->physical_block_size;
}
- if (blk_get_flags(conf->blk) & BDRV_O_UNMAP) {
+ if (blk_get_flags(blk) & BDRV_O_UNMAP) {
xen_device_backend_printf(xendev, "feature-discard", "%u", 1);
xen_device_backend_printf(xendev, "discard-granularity", "%u",
conf->discard_granularity);
@@ -260,12 +269,13 @@ static void xen_block_realize(XenDevice *xendev, Error **errp)
blockdev->device_type);
xen_device_backend_printf(xendev, "sector-size", "%u",
- XEN_BLKIF_SECTOR_SIZE);
+ conf->logical_block_size);
xen_block_set_size(blockdev);
blockdev->dataplane =
- xen_block_dataplane_create(xendev, conf, blockdev->props.iothread);
+ xen_block_dataplane_create(xendev, blk, conf->logical_block_size,
+ blockdev->props.iothread);
}
static void xen_block_frontend_changed(XenDevice *xendev,