* in @info, setting @errp on error.
*/
static void GRAPH_RDLOCK
-bdrv_do_query_node_info(BlockDriverState *bs, BlockNodeInfo *info, Error **errp)
+bdrv_do_query_node_info(BlockDriverState *bs, BlockNodeInfo *info, bool limits,
+ Error **errp)
{
int64_t size;
const char *backing_filename;
info->dirty_flag = bdi.is_dirty;
info->has_dirty_flag = true;
}
+
+ if (limits) {
+ info->limits = g_new(BlockLimitsInfo, 1);
+ *info->limits = (BlockLimitsInfo) {
+ .request_alignment = bs->bl.request_alignment,
+ .has_max_discard = bs->bl.max_pdiscard != 0,
+ .max_discard = bs->bl.max_pdiscard,
+ .has_discard_alignment = bs->bl.pdiscard_alignment != 0,
+ .discard_alignment = bs->bl.pdiscard_alignment,
+ .has_max_write_zeroes = bs->bl.max_pwrite_zeroes != 0,
+ .max_write_zeroes = bs->bl.max_pwrite_zeroes,
+ .has_write_zeroes_alignment = bs->bl.pwrite_zeroes_alignment != 0,
+ .write_zeroes_alignment = bs->bl.pwrite_zeroes_alignment,
+ .has_opt_transfer = bs->bl.opt_transfer != 0,
+ .opt_transfer = bs->bl.opt_transfer,
+ .has_max_transfer = bs->bl.max_transfer != 0,
+ .max_transfer = bs->bl.max_transfer,
+ .has_max_hw_transfer = bs->bl.max_hw_transfer != 0,
+ .max_hw_transfer = bs->bl.max_hw_transfer,
+ .max_iov = bs->bl.max_iov,
+ .has_max_hw_iov = bs->bl.max_hw_iov != 0,
+ .max_hw_iov = bs->bl.max_hw_iov,
+ .min_mem_alignment = bs->bl.min_mem_alignment,
+ .opt_mem_alignment = bs->bl.opt_mem_alignment,
+ };
+ }
+
info->format_specific = bdrv_get_specific_info(bs, &err);
if (err) {
error_propagate(errp, err);
ImageInfo *info;
info = g_new0(ImageInfo, 1);
- bdrv_do_query_node_info(bs, qapi_ImageInfo_base(info), errp);
+ bdrv_do_query_node_info(bs, qapi_ImageInfo_base(info), true, errp);
if (*errp) {
goto fail;
}
BdrvChild *c;
info = g_new0(BlockGraphInfo, 1);
- bdrv_do_query_node_info(bs, qapi_BlockGraphInfo_base(info), errp);
+ bdrv_do_query_node_info(bs, qapi_BlockGraphInfo_base(info), false, errp);
if (*errp) {
goto fail;
}
'file': 'ImageInfoSpecificFileWrapper'
} }
+##
+# @BlockLimitsInfo:
+#
+# @request-alignment: Alignment requirement, in bytes, for
+# offset/length of I/O requests.
+#
+# @max-discard: Maximum number of bytes that can be discarded at once.
+# If not present, there is no specific maximum.
+#
+# @discard-alignment: Optimal alignment for discard requests in bytes.
+# Note that this doesn't have to be a power of two. If not
+# present, discards don't have a alignment requirement different
+# from @request-alignment.
+#
+# @max-write-zeroes: Maximum number of bytes that can be zeroed out at
+# once. If not present, there is no specific maximum.
+#
+# @write-zeroes-alignment: Optimal alignment for write zeroes requests
+# in bytes. Note that this doesn't have to be a power of two. If
+# not present, write_zeroes doesn't have a alignment requirement
+# different from @request-alignment.
+#
+# @opt-transfer: Optimal transfer length in bytes. If not present,
+# there is no preferred size.
+#
+# @max-transfer: Maximal transfer length in bytes. If not present,
+# there is no specific maximum.
+#
+# @max-hw-transfer: Maximal hardware transfer length in bytes.
+# Applies whenever transfers to the device bypass the kernel I/O
+# scheduler, for example with SG_IO. If not present, there is no
+# specific maximum.
+#
+# @max-iov: Maximum number of scatter/gather elements
+#
+# @max-hw-iov: Maximum number of scatter/gather elements allowed by
+# the hardware. Applies whenever transfers to the device bypass
+# the kernel I/O scheduler, for example with SG_IO. If not
+# present, the hardware limits is unknown and @max-iov is always
+# used.
+#
+# @min-mem-alignment: Minimal required memory alignment in bytes for
+# zero-copy I/O to succeed. For unaligned requests, a bounce
+# buffer will be used.
+#
+# @opt-mem-alignment: Optimal memory alignment in bytes. This is the
+# alignment used for any buffer allocations QEMU performs
+# internally.
+##
+{ 'struct': 'BlockLimitsInfo',
+ 'data': { 'request-alignment': 'uint32',
+ '*max-discard': 'uint64',
+ '*discard-alignment': 'uint32',
+ '*max-write-zeroes': 'uint64',
+ '*write-zeroes-alignment': 'uint32',
+ '*opt-transfer': 'uint32',
+ '*max-transfer': 'uint32',
+ '*max-hw-transfer': 'uint32',
+ 'max-iov': 'int',
+ '*max-hw-iov': 'int',
+ 'min-mem-alignment': 'size',
+ 'opt-mem-alignment': 'size' } }
+
##
# @BlockNodeInfo:
#
#
# @snapshots: list of VM snapshots
#
+# @limits: block limits that are used for I/O on the node (Since 10.2)
+#
# @format-specific: structure supplying additional format-specific
# information (since 1.7)
#
'*cluster-size': 'int', '*encrypted': 'bool', '*compressed': 'bool',
'*backing-filename': 'str', '*full-backing-filename': 'str',
'*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
+ '*limits': 'BlockLimitsInfo',
'*format-specific': 'ImageInfoSpecific' } }
##
run_qemu()
{
- do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_qmp\
- | _filter_qemu_io | _filter_generated_node_ids
+ do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_qmp \
+ | _filter_qemu_io | _filter_generated_node_ids \
+ | _filter_img_info
}
test_throttle=$($QEMU_IMG --help|grep throttle)
},
"iops_wr": 0,
"ro": false,
- "children": [
- {
- "node-name": "disk0",
- "child": "file"
- }
- ],
"node-name": "throttle0",
"backing_file_depth": 1,
"drv": "throttle",
},
"iops_wr": 0,
"ro": false,
- "children": [
- ],
"node-name": "disk0",
"backing_file_depth": 0,
"drv": "null-co",
discard=0
regex_json_spec_start='^ *"format-specific": \{'
regex_json_child_start='^ *"children": \['
+ regex_json_limit_start='^ *"limits": \{'
gsed -e "s#$REMOTE_TEST_DIR#TEST_DIR#g" \
-e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
-e "s#$TEST_DIR#TEST_DIR#g" \
discard=1
elif [[ $line =~ "Child node '/" ]]; then
discard=1
- elif [[ $line =~ $regex_json_spec_start ]]; then
+ elif [[ $line =~ $regex_json_spec_start || $line =~ $regex_json_limit_start ]]; then
discard=2
regex_json_end="^${line%%[^ ]*}\\},? *$"
elif [[ $line =~ $regex_json_child_start ]]; then
projects / thirdparty / qemu.git / commitdiff
