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ebb718a5c7
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Eric Blake ebb718a5c7 qcow2: Catch more unaligned write_zero into zero cluster 
is_zero_cluster() and is_zero_cluster_top_locked() are used only
by qcow2_co_write_zeroes().  The former is too broad (we don't
care if the sectors we are about to overwrite are non-zero, only
that all other sectors in the cluster are zero), so it needs to
be called up to twice but with smaller limits - rename it along
with adding the neeeded parameter.  The latter can be inlined for
more compact code.

The testsuite change shows that we now have a sparser top file
when an unaligned write_zeroes overwrites the only portion of
the backing file with data.

Based on a patch proposal by Denis V. Lunev.

CC: Denis V. Lunev <den@openvz.org>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-06-08 10:21:08 +02:00
..
acpi-test-data tests: acpi: update tables with consolidated legacy cpu-hotplug AML 2016-06-07 15:36:54 +03:00
docker docker: Don't use eval trick on Makefile 2016-06-07 15:00:02 +01:00
guest-debug tests/guest-debug: introduce basic gdbstub tests 2015-12-17 13:37:15 +00:00
image-fuzzer tests: Use Python 2.6 "except E as ..." syntax 2016-02-08 17:29:54 +01:00
libqos tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
multiboot tests/multiboot: Add test for modules 2015-01-26 12:22:44 +01:00
qapi-schema qapi: Allow anonymous base for flat union 2016-03-18 10:29:26 +01:00
qemu-iotests qcow2: Catch more unaligned write_zero into zero cluster 2016-06-08 10:21:08 +02:00
rocker rocker: tests: don't need to specify master/self when setting vlans 2015-07-07 13:13:22 +01:00
tcg Fix some typos found by codespell 2016-05-18 15:04:27 +03:00
vmstate-static-checker-data tests: vmstate static checker: add size mismatch inside substructure 2014-06-23 19:14:52 +02:00
.gitignore tests: Add check-qnull 2016-05-12 09:47:54 +02:00
ac97-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ahci-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
bios-tables-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
boot-order-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
boot-sector.c all: Clean up includes 2016-02-23 12:43:05 +00:00
boot-sector.h tests: add pxe e1000 and virtio-pci tests 2016-02-16 12:05:18 +02:00
check-block.sh qemu-iotests: make check-block.sh work on out-of-tree builds 2016-01-07 21:30:16 +01:00
check-qdict.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qfloat.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qint.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qjson.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qlist.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qnull.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qom-interface.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qom-proplist.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
check-qstring.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
crypto-tls-x509-helpers.c tests: Clean up includes 2016-02-16 14:29:27 +00:00
crypto-tls-x509-helpers.h crypto: add sanity checking of TLS x509 credentials 2015-09-15 15:05:09 +01:00
device-introspect-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
display-vga-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
drive_del-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ds1338-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
e1000-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
e1000e-test.c e1000e: Introduce qtest for e1000e device 2016-06-02 10:42:30 +08:00
eepro100-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
endianness-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
es1370-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
fdc-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
fw_cfg-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
hd-geo-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
i440fx-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
i82801b11-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ide-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
intel-hda-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
io-channel-helpers.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
io-channel-helpers.h io: add QIOChannelSocket class 2015-12-18 12:18:31 +00:00
ioh3420-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ipmi-bt-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ipmi-kcs-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ipoctal232-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ivshmem-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
libqtest.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
libqtest.h all: Clean up includes 2016-02-23 12:43:05 +00:00
m48t59-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
Makefile -----BEGIN PGP SIGNATURE----- 2016-06-02 14:26:57 +01:00
ne2000-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
nvme-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
pc-cpu-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
pcnet-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
pkix_asn1_tab.c tests: Clean up includes 2016-02-16 14:29:27 +00:00
pvpanic-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
pxe-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
q35-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
qemu-iotests-quick.sh qemu-iotests: Speed up make check-block 2015-01-13 11:47:55 +00:00
qom-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
rcutorture.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
rtc-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
rtl8139-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
spapr-phb-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
tco-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-aio.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-base64.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-bitops.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-blockjob-txn.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-coroutine.c trivial patches for 2016-06-07 2016-06-07 16:34:45 +01:00
test-crypto-afsplit.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-block.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-cipher.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-crypto-hash.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-crypto-ivgen.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-pbkdf.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-secret.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-crypto-tlscredsx509.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-tlssession.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-xts.c crypto: import an implementation of the XTS cipher mode 2016-03-17 14:41:15 +00:00
test-cutils.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-filter-mirror.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-filter-redirector.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-hbitmap.c hbitmap: Use DIV_ROUND_UP 2016-06-07 18:19:25 +03:00
test-int128.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-io-channel-buffer.c tests: Clean up includes 2016-02-16 14:29:27 +00:00
test-io-channel-command.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-io-channel-file.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-io-channel-socket.c util: retry getaddrinfo if getting EAI_BADFLAGS with AI_V4MAPPED 2016-04-05 11:46:52 +02:00
test-io-channel-tls.c tests: Clean up includes 2016-02-16 14:29:27 +00:00
test-io-task.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-iov.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-logging.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-mul64.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-netfilter.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-opts-visitor.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qdev-global-props.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qemu-opts.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qga.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qmp-commands.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qmp-event.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qmp-input-strict.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qmp-input-visitor.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-qmp-output-visitor.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-rcu-list.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-rfifolock.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-string-input-visitor.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-string-output-visitor.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-thread-pool.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-throttle.c trivial patches for 2016-06-07 2016-06-07 16:34:45 +01:00
test-timed-average.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-visitor-serialization.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-vmstate.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-write-threshold.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-x86-cpuid.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-xbzrle.c util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
tmp105-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
tpci200-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
usb-hcd-ehci-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
usb-hcd-ohci-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
usb-hcd-uhci-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
usb-hcd-xhci-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
vhost-user-bridge.c tests/vhost-user-bridge: fix build on 32 bit systems 2016-02-25 13:14:19 +02:00
vhost-user-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-9p-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-balloon-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-blk-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-console-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-net-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-rng-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-scsi-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
virtio-serial-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
vmxnet3-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
wdt_ib700-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00