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Pull request

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Note that we're still discussing "block/blkio: Make driver nvme-io_uring take a
 "path" instead of a "filename"". I have sent the pull request now so everything
 is ready for the soft freeze tomorrow if we decide to go ahead with the patch.
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Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

Note that we're still discussing "block/blkio: Make driver nvme-io_uring take a
"path" instead of a "filename"". I have sent the pull request now so everything
is ready for the soft freeze tomorrow if we decide to go ahead with the patch.

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# gpg: Signature made Mon 31 Oct 2022 14:50:49 EDT
# gpg:                using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [ultimate]
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>" [ultimate]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
  block/blkio: Make driver nvme-io_uring take a "path" instead of a "filename"
  block/blkio: Tolerate device size changes
  block/blkio: Add virtio-blk-vfio-pci BlockDriver

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2022-11-01 13:49:33 -04:00
commit a11f65ec1b
2 changed files with 63 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
block/blkio.c
View file

@ -25,6 +25,7 @@
*/
#define DRIVER_IO_URING "io_uring"
#define DRIVER_NVME_IO_URING "nvme-io_uring"
#define DRIVER_VIRTIO_BLK_VFIO_PCI "virtio-blk-vfio-pci"
#define DRIVER_VIRTIO_BLK_VHOST_USER "virtio-blk-vhost-user"
#define DRIVER_VIRTIO_BLK_VHOST_VDPA "virtio-blk-vhost-vdpa"
@ -639,12 +640,17 @@ static int blkio_io_uring_open(BlockDriverState *bs, QDict *options, int flags,
static int blkio_nvme_io_uring(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
const char *filename = qdict_get_str(options, "filename");
const char *path = qdict_get_try_str(options, "path");
BDRVBlkioState *s = bs->opaque;
int ret;
ret = blkio_set_str(s->blkio, "path", filename);
qdict_del(options, "filename");
if (!path) {
error_setg(errp, "missing 'path' option");
return -EINVAL;
}
ret = blkio_set_str(s->blkio, "path", path);
qdict_del(options, "path");
if (ret < 0) {
error_setg_errno(errp, -ret, "failed to set path: %s",
blkio_get_error_msg());
@ -704,6 +710,8 @@ static int blkio_file_open(BlockDriverState *bs, QDict *options, int flags,
ret = blkio_io_uring_open(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_NVME_IO_URING) == 0) {
ret = blkio_nvme_io_uring(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_VIRTIO_BLK_VFIO_PCI) == 0) {
ret = blkio_virtio_blk_common_open(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_VIRTIO_BLK_VHOST_USER) == 0) {
ret = blkio_virtio_blk_common_open(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_VIRTIO_BLK_VHOST_VDPA) == 0) {
@ -845,6 +853,31 @@ static int64_t blkio_getlength(BlockDriverState *bs)
return capacity;
}
static int coroutine_fn blkio_truncate(BlockDriverState *bs, int64_t offset,
bool exact, PreallocMode prealloc,
BdrvRequestFlags flags, Error **errp)
{
int64_t current_length;
if (prealloc != PREALLOC_MODE_OFF) {
error_setg(errp, "Unsupported preallocation mode '%s'",
PreallocMode_str(prealloc));
return -ENOTSUP;
}
current_length = blkio_getlength(bs);
if (offset > current_length) {
error_setg(errp, "Cannot grow device");
return -EINVAL;
} else if (exact && offset != current_length) {
error_setg(errp, "Cannot resize device");
return -ENOTSUP;
}
return 0;
}
static int blkio_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
return 0;
@ -960,10 +993,12 @@ static void blkio_refresh_limits(BlockDriverState *bs, Error **errp)
{ \
.format_name = name, \
.protocol_name = name, \
.has_variable_length = true, \
.instance_size = sizeof(BDRVBlkioState), \
.bdrv_file_open = blkio_file_open, \
.bdrv_close = blkio_close, \
.bdrv_getlength = blkio_getlength, \
.bdrv_co_truncate = blkio_truncate, \
.bdrv_get_info = blkio_get_info, \
.bdrv_attach_aio_context = blkio_attach_aio_context, \
.bdrv_detach_aio_context = blkio_detach_aio_context, \
@ -986,7 +1021,10 @@ static BlockDriver bdrv_io_uring = BLKIO_DRIVER(
static BlockDriver bdrv_nvme_io_uring = BLKIO_DRIVER(
DRIVER_NVME_IO_URING,
.bdrv_needs_filename = true,
);
static BlockDriver bdrv_virtio_blk_vfio_pci = BLKIO_DRIVER(
DRIVER_VIRTIO_BLK_VFIO_PCI
);
static BlockDriver bdrv_virtio_blk_vhost_user = BLKIO_DRIVER(
@ -1001,6 +1039,7 @@ static void bdrv_blkio_init(void)
{
bdrv_register(&bdrv_io_uring);
bdrv_register(&bdrv_nvme_io_uring);
bdrv_register(&bdrv_virtio_blk_vfio_pci);
bdrv_register(&bdrv_virtio_blk_vhost_user);
bdrv_register(&bdrv_virtio_blk_vhost_vdpa);
}

22
qapi/block-core.json
View file

@ -2960,6 +2960,7 @@
'raw', 'rbd',
{ 'name': 'replication', 'if': 'CONFIG_REPLICATION' },
'ssh', 'throttle', 'vdi', 'vhdx',
{ 'name': 'virtio-blk-vfio-pci', 'if': 'CONFIG_BLKIO' },
{ 'name': 'virtio-blk-vhost-user', 'if': 'CONFIG_BLKIO' },
{ 'name': 'virtio-blk-vhost-vdpa', 'if': 'CONFIG_BLKIO' },
'vmdk', 'vpc', 'vvfat' ] }
@ -3703,12 +3704,26 @@
#
# Driver specific block device options for the nvme-io_uring backend.
#
# @filename: path to the image file
# @path: path to the image file
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsNvmeIoUring',
'data': { 'filename': 'str' },
'data': { 'path': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsVirtioBlkVfioPci:
#
# Driver specific block device options for the virtio-blk-vfio-pci backend.
#
# @path: path to the PCI device's sysfs directory (e.g.
# /sys/bus/pci/devices/0000:00:01.0).
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsVirtioBlkVfioPci',
'data': { 'path': 'str' },
'if': 'CONFIG_BLKIO' }
##
@ -4390,6 +4405,9 @@
'throttle': 'BlockdevOptionsThrottle',
'vdi': 'BlockdevOptionsGenericFormat',
'vhdx': 'BlockdevOptionsGenericFormat',
'virtio-blk-vfio-pci':
{ 'type': 'BlockdevOptionsVirtioBlkVfioPci',
'if': 'CONFIG_BLKIO' },
'virtio-blk-vhost-user':
{ 'type': 'BlockdevOptionsVirtioBlkVhostUser',
'if': 'CONFIG_BLKIO' },