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nbd patches for 2018-02-09 

- Vladimir Sementsov-Ogievskiy: iotests: 205: support luks format
 - Eric Blake: block: Simplify bdrv_can_write_zeroes_with_unmap()
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 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg
 
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Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2018-02-09' into staging

nbd patches for 2018-02-09

- Vladimir Sementsov-Ogievskiy: iotests: 205: support luks format
- Eric Blake: block: Simplify bdrv_can_write_zeroes_with_unmap()

# gpg: Signature made Fri 09 Feb 2018 18:34:20 GMT
# gpg:                using RSA key A7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>"
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>"
# gpg:                 aka "[jpeg image of size 6874]"
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2018-02-09:
  block: Simplify bdrv_can_write_zeroes_with_unmap()
  iotests: 205: support luks format

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Peter Maydell 2018-02-12 09:36:28 +00:00
parent c7b02d7d03 e24d813b29
commit 019bb9ac98
10 changed files with 40 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
block.c
View File

@ -4010,17 +4010,11 @@ bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs)
bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs)
{
BlockDriverInfo bdi;
if (!(bs->open_flags & BDRV_O_UNMAP)) {
return false;
}
if (bdrv_get_info(bs, &bdi) == 0) {
return bdi.can_write_zeroes_with_unmap;
}
return false;
return bs->supported_zero_flags & BDRV_REQ_MAY_UNMAP;
}
const char *bdrv_get_encrypted_filename(BlockDriverState *bs)

1
block/crypto.c
View File

@ -576,7 +576,6 @@ static int block_crypto_get_info_luks(BlockDriverState *bs,
}
bdi->unallocated_blocks_are_zero = false;
bdi->can_write_zeroes_with_unmap = false;
bdi->cluster_size = subbdi.cluster_size;
return 0;

3
block/file-posix.c
View File

@ -549,7 +549,6 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
s->has_discard = true;
s->has_write_zeroes = true;
bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
if ((bs->open_flags & BDRV_O_NOCACHE) != 0) {
s->needs_alignment = true;
}
@ -599,6 +598,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
}
#endif
bs->supported_zero_flags = s->discard_zeroes ? BDRV_REQ_MAY_UNMAP : 0;
ret = 0;
fail:
if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) {
@ -2223,7 +2223,6 @@ static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
BDRVRawState *s = bs->opaque;
bdi->unallocated_blocks_are_zero = s->discard_zeroes;
bdi->can_write_zeroes_with_unmap = s->discard_zeroes;
return 0;
}

6
block/iscsi.c
View File

@ -1877,7 +1877,6 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
if (iscsilun->dpofua) {
bs->supported_write_flags = BDRV_REQ_FUA;
}
bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
/* Check the write protect flag of the LUN if we want to write */
if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) &&
@ -1961,6 +1960,10 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
}
}
if (iscsilun->lbprz && iscsilun->lbp.lbpws) {
bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
}
out:
qemu_opts_del(opts);
g_free(initiator_name);
@ -2160,7 +2163,6 @@ static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
IscsiLun *iscsilun = bs->opaque;
bdi->unallocated_blocks_are_zero = iscsilun->lbprz;
bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws;
bdi->cluster_size = iscsilun->cluster_sectors * BDRV_SECTOR_SIZE;
return 0;
}

11
block/nbd.c
View File

@ -566,14 +566,6 @@ static void nbd_refresh_filename(BlockDriverState *bs, QDict *options)
bs->full_open_options = opts;
}
static int nbd_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
if (bs->supported_zero_flags & BDRV_REQ_MAY_UNMAP) {
bdi->can_write_zeroes_with_unmap = true;
}
return 0;
}
static BlockDriver bdrv_nbd = {
.format_name = "nbd",
.protocol_name = "nbd",
@ -591,7 +583,6 @@ static BlockDriver bdrv_nbd = {
.bdrv_detach_aio_context = nbd_detach_aio_context,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_refresh_filename = nbd_refresh_filename,
.bdrv_get_info = nbd_get_info,
};
static BlockDriver bdrv_nbd_tcp = {
@ -611,7 +602,6 @@ static BlockDriver bdrv_nbd_tcp = {
.bdrv_detach_aio_context = nbd_detach_aio_context,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_refresh_filename = nbd_refresh_filename,
.bdrv_get_info = nbd_get_info,
};
static BlockDriver bdrv_nbd_unix = {
@ -631,7 +621,6 @@ static BlockDriver bdrv_nbd_unix = {
.bdrv_detach_aio_context = nbd_detach_aio_context,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_refresh_filename = nbd_refresh_filename,
.bdrv_get_info = nbd_get_info,
};
static void bdrv_nbd_init(void)

3
block/qcow2.c
View File

@ -1479,7 +1479,7 @@ static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
/* Initialise locks */
qemu_co_mutex_init(&s->lock);
bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
bs->supported_zero_flags = header.version >= 3 ? BDRV_REQ_MAY_UNMAP : 0;
/* Repair image if dirty */
if (!(flags & (BDRV_O_CHECK | BDRV_O_INACTIVE)) && !bs->read_only &&
@ -3771,7 +3771,6 @@ static int qcow2_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcow2State *s = bs->opaque;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = (s->qcow_version >= 3);
bdi->cluster_size = s->cluster_size;
bdi->vm_state_offset = qcow2_vm_state_offset(s);
return 0;

1
block/qed.c
View File

@ -1438,7 +1438,6 @@ static int bdrv_qed_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
bdi->cluster_size = s->header.cluster_size;
bdi->is_dirty = s->header.features & QED_F_NEED_CHECK;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = true;
return 0;
}

11
include/block/block.h
View File

@ -26,17 +26,6 @@ typedef struct BlockDriverInfo {
* to the LBPRZ flag in the SCSI logical block provisioning page.
*/
bool unallocated_blocks_are_zero;
/*
* True if the driver can optimize writing zeroes by unmapping
* sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
* with the difference that in qemu a discard is allowed to silently
* fail. Therefore we have to use bdrv_pwrite_zeroes with the
* BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
* After this call the driver has to guarantee that the contents read
* back as zero. It is additionally required that the block device is
* opened with BDRV_O_UNMAP flag for this to work.
*/
bool can_write_zeroes_with_unmap;
/*
* True if this block driver only supports compressed writes
*/

4
tests/qemu-iotests/205
View File

@ -22,7 +22,7 @@ import os
import sys
import iotests
import time
from iotests import qemu_img, qemu_io, filter_qemu_io, QemuIoInteractive
from iotests import qemu_img_create, qemu_io, filter_qemu_io, QemuIoInteractive
nbd_sock = 'nbd_sock'
nbd_uri = 'nbd+unix:///exp?socket=' + nbd_sock
@ -31,7 +31,7 @@ disk = os.path.join(iotests.test_dir, 'disk')
class TestNbdServerRemove(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, disk, '1M')
qemu_img_create('-f', iotests.imgfmt, disk, '1M')
self.vm = iotests.VM().add_drive(disk)
self.vm.launch()

31
tests/qemu-iotests/iotests.py
View File

@ -58,6 +58,11 @@ qemu_default_machine = os.environ.get('QEMU_DEFAULT_MACHINE')
socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
debug = False
luks_default_secret_object = 'secret,id=keysec0,data=' + \
os.environ['IMGKEYSECRET']
luks_default_key_secret_opt = 'key-secret=keysec0'
def qemu_img(*args):
'''Run qemu-img and return the exit code'''
devnull = open('/dev/null', 'r+')
@ -66,6 +71,25 @@ def qemu_img(*args):
sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
return exitcode
def qemu_img_create(*args):
args = list(args)
# default luks support
if '-f' in args and args[args.index('-f') + 1] == 'luks':
if '-o' in args:
i = args.index('-o')
if 'key-secret' not in args[i + 1]:
args[i + 1].append(luks_default_key_secret_opt)
args.insert(i + 2, '--object')
args.insert(i + 3, luks_default_secret_object)
else:
args = ['-o', luks_default_key_secret_opt,
'--object', luks_default_secret_object] + args
args.insert(0, 'create')
return qemu_img(*args)
def qemu_img_verbose(*args):
'''Run qemu-img without suppressing its output and return the exit code'''
exitcode = subprocess.call(qemu_img_args + list(args))
@ -263,6 +287,13 @@ class VM(qtest.QEMUQtestMachine):
if opts:
options.append(opts)
if format == 'luks' and 'key-secret' not in opts:
# default luks support
if luks_default_secret_object not in self._args:
self.add_object(luks_default_secret_object)
options.append(luks_default_key_secret_opt)
self._args.append('-drive')
self._args.append(','.join(options))
self._num_drives += 1