[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v5 2/3] block: Add backend_defaults property
|
From: |
Akihiko Odaki |
|
Subject: |
[PATCH v5 2/3] block: Add backend_defaults property |
|
Date: |
Mon, 5 Jul 2021 22:04:57 +0900 |
backend_defaults property allow users to control if default block
properties should be decided with backend information.
If it is off, any backend information will be discarded, which is
suitable if you plan to perform live migration to a different disk backend.
If it is on, a block device may utilize backend information more
aggressively.
By default, it is auto, which uses backend information for block
sizes and ignores the others, which is consistent with the older
versions.
Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
---
hw/block/block.c | 42 ++++++++++++++++++++++++++++++++++----
include/hw/block/block.h | 3 +++
tests/qemu-iotests/172.out | 38 ++++++++++++++++++++++++++++++++++
3 files changed, 79 insertions(+), 4 deletions(-)
diff --git a/hw/block/block.c b/hw/block/block.c
index 1e34573da71..d47ebf005ad 100644
--- a/hw/block/block.c
+++ b/hw/block/block.c
@@ -65,24 +65,58 @@ bool blkconf_blocksizes(BlockConf *conf, Error **errp)
{
BlockBackend *blk = conf->blk;
BlockSizes blocksizes;
- int backend_ret;
+ BlockDriverState *bs;
+ bool use_blocksizes;
+ bool use_bs;
+
+ switch (conf->backend_defaults) {
+ case ON_OFF_AUTO_AUTO:
+ use_blocksizes = !blk_probe_blocksizes(blk, &blocksizes);
+ use_bs = false;
+ break;
+
+ case ON_OFF_AUTO_ON:
+ use_blocksizes = !blk_probe_blocksizes(blk, &blocksizes);
+ bs = blk_bs(blk);
+ use_bs = bs;
+ break;
+
+ case ON_OFF_AUTO_OFF:
+ use_blocksizes = false;
+ use_bs = false;
+ break;
+
+ default:
+ abort();
+ }
- backend_ret = blk_probe_blocksizes(blk, &blocksizes);
/* fill in detected values if they are not defined via qemu command line */
if (!conf->physical_block_size) {
- if (!backend_ret) {
+ if (use_blocksizes) {
conf->physical_block_size = blocksizes.phys;
} else {
conf->physical_block_size = BDRV_SECTOR_SIZE;
}
}
if (!conf->logical_block_size) {
- if (!backend_ret) {
+ if (use_blocksizes) {
conf->logical_block_size = blocksizes.log;
} else {
conf->logical_block_size = BDRV_SECTOR_SIZE;
}
}
+ if (use_bs) {
+ if (!conf->opt_io_size) {
+ conf->opt_io_size = bs->bl.opt_transfer;
+ }
+ if (conf->discard_granularity == -1) {
+ if (bs->bl.pdiscard_alignment) {
+ conf->discard_granularity = bs->bl.pdiscard_alignment;
+ } else if (bs->bl.request_alignment != 1) {
+ conf->discard_granularity = bs->bl.request_alignment;
+ }
+ }
+ }
if (conf->logical_block_size > conf->physical_block_size) {
error_setg(errp,
diff --git a/include/hw/block/block.h b/include/hw/block/block.h
index c172cbe65f1..5902c0440a5 100644
--- a/include/hw/block/block.h
+++ b/include/hw/block/block.h
@@ -19,6 +19,7 @@
typedef struct BlockConf {
BlockBackend *blk;
+ OnOffAuto backend_defaults;
uint32_t physical_block_size;
uint32_t logical_block_size;
uint32_t min_io_size;
@@ -48,6 +49,8 @@ static inline unsigned int get_physical_block_exp(BlockConf
*conf)
}
#define DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) \
+ DEFINE_PROP_ON_OFF_AUTO("backend_defaults", _state, \
+ _conf.backend_defaults, ON_OFF_AUTO_AUTO), \
DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \
_conf.logical_block_size), \
DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \
diff --git a/tests/qemu-iotests/172.out b/tests/qemu-iotests/172.out
index d53f61d0dee..4cf4d536b46 100644
--- a/tests/qemu-iotests/172.out
+++ b/tests/qemu-iotests/172.out
@@ -21,6 +21,7 @@ Testing:
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -48,6 +49,7 @@ Testing: -fda TEST_DIR/t.qcow2
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -85,6 +87,7 @@ Testing: -fdb TEST_DIR/t.qcow2
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -96,6 +99,7 @@ Testing: -fdb TEST_DIR/t.qcow2
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -137,6 +141,7 @@ Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2.2
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -148,6 +153,7 @@ Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2.2
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -190,6 +196,7 @@ Testing: -fdb
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -201,6 +208,7 @@ Testing: -fdb
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -228,6 +236,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -265,6 +274,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2,index=1
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -276,6 +286,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2,index=1
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -317,6 +328,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive
if=floppy,file=TEST_DIR/t
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -328,6 +340,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive
if=floppy,file=TEST_DIR/t
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -373,6 +386,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device
floppy,drive=none0
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -410,6 +424,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device
floppy,drive=none0,unit=1
dev: floppy, id ""
unit = 1 (0x1)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -447,6 +462,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qco
dev: floppy, id ""
unit = 1 (0x1)
drive = "none1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -458,6 +474,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qco
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -509,6 +526,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 1 (0x1)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -520,6 +538,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -562,6 +581,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 1 (0x1)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -573,6 +593,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -615,6 +636,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -626,6 +648,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -668,6 +691,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -679,6 +703,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.qcow2.2 -device fl
dev: floppy, id ""
unit = 1 (0x1)
drive = "floppy1"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -730,6 +755,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.q
dev: floppy, id ""
unit = 1 (0x1)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -741,6 +767,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.q
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -783,6 +810,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.q
dev: floppy, id ""
unit = 1 (0x1)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -794,6 +822,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive
if=none,file=TEST_DIR/t.q
dev: floppy, id ""
unit = 0 (0x0)
drive = "floppy0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -842,6 +871,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -global
floppy.drive=none0 -device
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -909,6 +939,7 @@ Testing: -device floppy
dev: floppy, id ""
unit = 0 (0x0)
drive = ""
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -933,6 +964,7 @@ Testing: -device floppy,drive-type=120
dev: floppy, id ""
unit = 0 (0x0)
drive = ""
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -957,6 +989,7 @@ Testing: -device floppy,drive-type=144
dev: floppy, id ""
unit = 0 (0x0)
drive = ""
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -981,6 +1014,7 @@ Testing: -device floppy,drive-type=288
dev: floppy, id ""
unit = 0 (0x0)
drive = ""
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -1008,6 +1042,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device
floppy,drive=none0,drive-t
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -1045,6 +1080,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device
floppy,drive=none0,drive-t
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -1085,6 +1121,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device
floppy,drive=none0,logical
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
@@ -1122,6 +1159,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device
floppy,drive=none0,physica
dev: floppy, id ""
unit = 0 (0x0)
drive = "none0"
+ backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
--
2.30.1 (Apple Git-130)