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block: Add backend_defaults property

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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>
Message-id: 20210705130458.97642-2-akihiko.odaki@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Akihiko Odaki 2021-07-05 22:04:57 +09:00 • committed by Stefan Hajnoczi
parent 0dfc7af2b2
commit 12a521b56d
3 changed files with 79 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

38
tests/qemu-iotests/172.out
View file

@ -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)