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qemu-e2k/tests
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Eric Blake fbaa6bb3d3 qcow2: Optimize write zero of unaligned tail cluster 
We've already improved discards to operate efficiently on the tail
of an unaligned qcow2 image; it's time to make a similar improvement
to write zeroes.  The special case is only valid at the tail
cluster of a file, where we must recognize that any sectors beyond
the image end would implicitly read as zero, and therefore should
not penalize our logic for widening a partial cluster into writing
the whole cluster as zero.

However, note that for now, the special case of end-of-file is only
recognized if there is no backing file, or if the backing file has
the same length; that's because when the backing file is shorter
than the active layer, we don't have code in place to recognize
that reads of a sector unallocated at the top and beyond the backing
end-of-file are implicitly zero.  It's not much of a real loss,
because most people don't use images that aren't cluster-aligned,
or where the active layer is a different size than the backing
layer (especially where the difference falls within a single cluster).

Update test 154 to cover the new scenarios, using two images of
intentionally differing length.

While at it, fix the test to gracefully skip when run as
./check -qcow2 -o compat=0.10 154
since the older format lacks zero clusters already required earlier
in the test.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170507000552.20847-11-eblake@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-05-11 14:28:07 +02:00
..
acpi-test-data tests/acpi: update DSDT after last patch 2017-03-02 07:31:26 +02:00
data tests: use static qga config file 2016-07-25 13:23:18 -05:00
docker docker/dockerfiles/debian-s390-cross: include clang 2017-03-10 15:05:22 +08:00
guest-debug
image-fuzzer
libqos tests: fix virtio-blk-test leaks 2017-03-01 11:58:57 +04:00
migration tests: introduce a framework for testing migration performance 2016-07-22 13:23:39 +05:30
multiboot
qapi-schema qapi2texi: Fix translation of *strong* and _emphasized_ 2017-03-21 10:42:58 +01:00
qemu-iotests qcow2: Optimize write zero of unaligned tail cluster 2017-05-11 14:28:07 +02:00
rocker
tcg target/openrisc: Rename the cpu from or32 to or1k 2017-02-14 08:14:58 +11:00
vmstate-static-checker-data
.gitignore test-qapi-util: New, covering qapi/qapi-util.c 2017-03-07 16:07:47 +01:00
ac97-test.c
acpi-utils.c tests: Move reusable ACPI code into a utility file 2017-03-02 07:14:27 +02:00
acpi-utils.h hw/i386: Use Rev3 FADT (ACPI 2.0) instead of Rev1 to improve guest OS support. 2017-05-03 12:29:40 +02:00
ahci-test.c ahci-test: add QMP tray test for ATAPI 2016-11-14 11:15:55 -05:00
atomic_add-bench.c tests: add atomic_add-bench 2016-10-26 08:29:01 -07:00
bios-tables-test.c hw/i386: Use Rev3 FADT (ACPI 2.0) instead of Rev1 to improve guest OS support. 2017-05-03 12:29:40 +02:00
boot-order-test.c
boot-sector.c tests/boot-sector: Increase time-out to 90 seconds 2016-10-14 10:06:47 +11:00
boot-sector.h tests/boot-sector: Use mkstemp() to create a unique file name 2016-10-14 10:06:47 +11:00
boot-serial-test.c boot-serial-test: use -no-shutdown 2017-03-24 13:39:50 +00:00
check-block.sh tests: allow to specify list of formats to test for check-block.sh 2016-09-23 13:36:09 +02:00
check-qdict.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
check-qfloat.c
check-qint.c
check-qjson.c check-qjson: Test errors from qobject_from_json() 2017-03-07 16:07:47 +01:00
check-qlist.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
check-qnull.c qapi: Drop unused non-strict qobject input visitor 2017-03-05 09:14:19 +01:00
check-qom-interface.c tests: fix check-qom-interface leaks 2016-09-08 17:57:32 +04:00
check-qom-proplist.c tests: fix check-qom-proplist leaks 2016-09-08 17:57:32 +04:00
check-qstring.c
crypto-tls-x509-helpers.c
crypto-tls-x509-helpers.h clean-up: removed duplicate #includes 2016-10-28 18:17:24 +03:00
device-introspect-test.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
display-vga-test.c qtest: add display-vga-test to ppc64 2017-01-31 10:10:13 +11:00
drive_del-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
ds1338-test.c
e1000-test.c tests: fix e1000-test leak 2017-03-01 11:51:28 +04:00
e1000e-test.c tests: fix e1000e leaks 2017-03-01 11:51:28 +04:00
eepro100-test.c tests: fix eepro100-test leak 2017-03-01 11:51:05 +04:00
endianness-test.c tests: fix endianness-test leaks 2017-03-01 00:09:28 +04:00
es1370-test.c
fdc-test.c fdc-test: Avoid deprecated 'change' command 2017-05-09 09:14:40 +02:00
fw_cfg-test.c
hd-geo-test.c tests: fix hd-geo-test leaks 2017-03-01 11:51:04 +04:00
i440fx-test.c tests: fix i440fx-test leaks 2017-03-01 11:51:28 +04:00
i82801b11-test.c
ide-test.c tests: fix ide-test leaks 2017-03-01 11:51:04 +04:00
intel-hda-test.c
io-channel-helpers.c
io-channel-helpers.h
ioh3420-test.c
iothread.c aio: introduce aio_co_schedule and aio_co_wake 2017-02-21 11:14:07 +00:00
iothread.h aio: introduce aio_co_schedule and aio_co_wake 2017-02-21 11:14:07 +00:00
ipmi-bt-test.c tests: fix ipmi-bt-test leak 2017-03-01 11:51:05 +04:00
ipmi-kcs-test.c tests: fix ipmi-kcs-test leak 2017-03-01 11:51:05 +04:00
ipoctal232-test.c
ivshmem-test.c qtest: add ivshmem-test for ppc64 2017-01-31 10:10:13 +11:00
libqtest.c test-qga: Actually test 0xff sync bytes 2017-05-09 09:14:40 +02:00
libqtest.h libqtest: Add a generic function to run a callback function for every machine 2017-04-26 14:42:31 +01:00
m25p80-test.c aspeed/smc: extend tests for Command mode 2017-01-20 11:15:08 +00:00
m48t59-test.c
Makefile.include tests: Add a tester for HMP commands 2017-04-26 14:42:31 +01:00
ne2000-test.c
nvme-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
pc-cpu-test.c libqtest: Add a generic function to run a callback function for every machine 2017-04-26 14:42:31 +01:00
pcnet-test.c
pkix_asn1_tab.c qtest: fix make check complaint in crypto module 2016-10-19 10:09:24 +01:00
pnv-xscom-test.c powernv: Don't test POWER9 CPU yet 2017-03-03 11:30:59 +11:00
postcopy-test.c tests: fix qmp response leak 2017-03-01 00:09:28 +04:00
prom-env-test.c tests/prom-env: Enable the test for the sun4u machine, too 2017-02-28 09:03:39 +03:00
ptimer-test-stubs.c tests: fix ptimer leaks 2017-03-01 00:09:28 +04:00
ptimer-test.c tests: fix ptimer leaks 2017-03-01 00:09:28 +04:00
ptimer-test.h tests: ptimer: Change the copyright comment 2016-10-24 16:26:53 +01:00
pvpanic-test.c tests: fix qmp response leak 2017-03-01 00:09:28 +04:00
pxe-test.c tests/boot-sector: Use mkstemp() to create a unique file name 2016-10-14 10:06:47 +11:00
q35-test.c tests: fix q35-test leaks 2017-03-01 11:50:33 +04:00
qemu-iotests-quick.sh
qht-bench.c qht-bench: relax test_start/stop atomic accesses 2016-10-24 15:27:19 +02:00
qmp-test.c qapi: Drop unused non-strict qobject input visitor 2017-03-05 09:14:19 +01:00
qom-test.c libqtest: Add a generic function to run a callback function for every machine 2017-04-26 14:42:31 +01:00
rcutorture.c
rtas-test.c tests: don't check if qtest_spapr_boot() returns NULL 2016-10-28 09:36:58 +11:00
rtc-test.c
rtl8139-test.c libqos: Change PCI accessors to take opaque BAR handle 2016-10-28 09:38:27 +11:00
spapr-phb-test.c spapr: Improved placement of PCI host bridges in guest memory map 2016-10-16 12:04:15 +11:00
tco-test.c tests: fix tco-test leaks 2017-03-01 11:51:25 +04:00
test-aio-multithread.c cpus: define QEMUTimerListNotifyCB for QEMU system emulation 2017-03-14 13:28:29 +01:00
test-aio.c cpus: define QEMUTimerListNotifyCB for QEMU system emulation 2017-03-14 13:28:29 +01:00
test-arm-mptimer.c tests: Add tests for the ARM MPTimer 2016-10-24 16:26:54 +01:00
test-base64.c
test-bitcnt.c tests: New test-bitcnt 2017-01-10 08:49:59 -08:00
test-bitops.c
test-blockjob-txn.c tests/block-job-txn: Don't start block job before adding to txn 2017-04-11 20:07:15 +08:00
test-blockjob.c tests: Remove FIXME comments 2017-02-28 20:47:50 +01:00
test-bufferiszero.c cutils: Add test for buffer_is_zero 2016-09-13 19:13:32 +02:00
test-char.c sockets: Limit SocketAddressLegacy to external interfaces 2017-05-09 09:14:40 +02:00
test-clone-visitor.c qapi: Add new clone visitor 2016-07-06 10:52:04 +02:00
test-coroutine.c test-coroutine: test qemu_coroutine_entered() 2016-09-28 17:11:23 +01:00
test-crypto-afsplit.c
test-crypto-block.c crypto: Make errp the last parameter of functions 2017-04-24 09:13:22 +02:00
test-crypto-cipher.c crypto: add 3des-ede support when using libgcrypt/nettle 2016-12-21 14:26:26 +00:00
test-crypto-hash.c crypto: fix initialization of crypto in tests 2016-10-19 10:23:55 +01:00
test-crypto-hmac.c crypto: add HMAC algorithms testcases 2016-12-22 09:24:59 +00:00
test-crypto-ivgen.c
test-crypto-pbkdf.c crypto: support more hash algorithms for pbkdf 2016-09-19 16:30:45 +01:00
test-crypto-secret.c
test-crypto-tlscredsx509.c
test-crypto-tlssession.c
test-crypto-xts.c crypto: rename OUT to out in xts test to avoid clash on MinGW 2016-07-04 10:46:59 +01:00
test-cutils.c util/cutils: Change qemu_strtosz*() from int64_t to uint64_t 2017-02-23 20:35:36 +01:00
test-filter-mirror.c tests: fix qmp response leak 2017-03-01 00:09:28 +04:00
test-filter-redirector.c tests: fix qmp response leak 2017-03-01 00:09:28 +04:00
test-hbitmap.c test-hbitmap: Add hbitmap_is_serializable() calls 2017-01-26 10:25:01 +08:00
test-hmp.c tests: Add a tester for HMP commands 2017-04-26 14:42:31 +01:00
test-int128.c int128: Use __int128 if available 2016-10-26 08:29:00 -07:00
test-io-channel-buffer.c
test-io-channel-command.c tests: fix leaks in test-io-channel-command 2017-03-01 00:09:28 +04:00
test-io-channel-file.c
test-io-channel-socket.c sockets: Limit SocketAddressLegacy to external interfaces 2017-05-09 09:14:40 +02:00
test-io-channel-tls.c io: change the QIOTask callback signature 2017-01-23 15:32:18 +00:00
test-io-task.c io: fix possible double free of task error object 2017-01-26 10:26:18 +00:00
test-iov.c tests: fix test-iov leaks 2016-09-08 17:57:32 +04:00
test-keyval.c test-keyval: fix leaks 2017-05-08 20:32:14 +02:00
test-logging.c test-logging: don't hard-code paths in /tmp 2016-08-19 12:44:11 +01:00
test-mul64.c
test-netfilter.c
test-opts-visitor.c qapi: Fix QemuOpts visitor regression on unvisited input 2017-03-22 19:24:34 +01:00
test-qapi-util.c qapi: New parse_qapi_name() 2017-03-07 16:07:47 +01:00
test-qdev-global-props.c
test-qdist.c qdist: return "(empty)" instead of NULL when printing an empty dist 2016-08-03 18:44:56 +02:00
test-qemu-opts.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
test-qga.c test-qga: Actually test 0xff sync bytes 2017-05-09 09:14:40 +02:00
test-qht-par.c
test-qht.c test-qht: perform lookups under rcu_read_lock 2016-10-06 18:04:13 +02:00
test-qmp-commands.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
test-qmp-event.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
test-qobject-input-visitor.c test-qobject-input-visitor: Cover visit_type_uint64() 2017-03-21 20:01:39 +01:00
test-qobject-output-visitor.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
test-rcu-list.c
test-replication.c tests: Disable image lock in test-replication 2017-05-11 11:08:41 +02:00
test-shift128.c host-utils: Implement unsigned quadword left/right shift and unit tests 2017-01-31 10:10:14 +11:00
test-string-input-visitor.c qapi: Fix string input visitor regression for empty lists 2017-03-21 10:43:01 +01:00
test-string-output-visitor.c qapi: rename *qmp-*-visitor* to *qobject-*-visitor* 2016-10-25 16:25:48 +02:00
test-thread-pool.c test-thread-pool: use generic AioContext infrastructure 2017-02-21 11:14:07 +00:00
test-throttle.c throttle: make throttle_config(throttle_get_config()) symmetric 2017-04-21 10:36:12 +01:00
test-timed-average.c
test-uuid.c test-uuid: fix leak 2016-11-11 20:53:23 +08:00
test-visitor-serialization.c test-visitor-serialization: Pass &error_abort to qobject_from_json() 2017-03-07 16:07:47 +01:00
test-vmstate.c tests/test-vmstate.c: test array of ptr to primitive 2017-02-28 11:30:22 +00:00
test-write-threshold.c
test-x86-cpuid-compat.c target-i386: Print warning when mixing [+-]foo and foo=(on|off) 2016-10-31 16:20:59 -02:00
test-x86-cpuid.c
test-xbzrle.c
tmp105-test.c
tpci200-test.c
usb-hcd-ehci-test.c tests: fix usb-test leaks 2017-03-01 11:51:29 +04:00
usb-hcd-ohci-test.c
usb-hcd-uhci-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
usb-hcd-xhci-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
vhost-user-bridge.c tests/vhost-user-bridge: use contrib/libvhost-user 2016-12-16 01:14:38 +02:00
vhost-user-test.c char: add a /chardevs container 2017-05-04 15:34:41 +04:00
virtio-9p-test.c tests/virtio-9p-test: Don't call le*_to_cpus on fields of packed struct 2017-03-27 21:15:31 +02:00
virtio-balloon-test.c
virtio-blk-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
virtio-console-test.c
virtio-net-test.c tests: enable virtio tests on SPAPR 2016-10-28 09:36:58 +11:00
virtio-rng-test.c tests: enable virtio tests on SPAPR 2016-10-28 09:36:58 +11:00
virtio-scsi-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
virtio-serial-test.c
vmxnet3-test.c
wdt_ib700-test.c