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Tomáš Golembiovský a41c457881 curl: Operate on zero-length file 
Another attempt to fix the bug 1596870.

When creating new disk backed by remote file accessed via HTTPS and the
backing file has zero length, qemu-img terminates with uniformative
error message:

    qemu-img: disk.qcow2: CURL: Error opening file:

While it may not make much sense to operate on empty file, other block
backends (e.g. raw backend for regular files) seem to allow it. This
patch fixes it for the curl backend and improves the reported error.

Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2016-09-15 15:32:22 +03:00
..
accounting.c block: Clean up includes 2016-01-20 13:36:23 +01:00
archipelago.c coccinelle: Remove unnecessary variables for function return value 2016-06-20 16:38:13 +02:00
backup.c Backup: export interfaces for extra serialization 2016-09-13 11:00:56 +01:00
blkdebug.c block/blkdebug: Store config filename 2016-08-15 15:52:28 +02:00
blkreplay.c blkreplay: Switch .bdrv_co_discard() to byte-based 2016-07-20 14:11:55 +01:00
blkverify.c block: Convert bdrv_aio_writev() to BdrvChild 2016-07-05 16:46:26 +02:00
block-backend.c block: remove BlockDriver.bdrv_write_compressed 2016-09-05 19:06:48 +02:00
bochs.c block: Convert bdrv_co_preadv/pwritev to BdrvChild 2016-07-05 16:46:27 +02:00
cloop.c block: Convert bdrv_pread(v) to BdrvChild 2016-07-05 16:46:27 +02:00
commit.c Improve block job rate limiting for small bandwidth values 2016-07-13 13:41:38 +02:00
crypto.c block: export LUKS specific data to qemu-img info 2016-07-26 17:46:37 +02:00
curl.c curl: Operate on zero-length file 2016-09-15 15:32:22 +03:00
dirty-bitmap.c dirty-bitmap: operate with int64_t amount 2016-07-19 16:54:46 -04:00
dmg.c block: Convert bdrv_pread(v) to BdrvChild 2016-07-05 16:46:27 +02:00
gluster.c block/gluster: add support to choose libgfapi logfile 2016-09-13 01:34:47 -04:00
io.c block/io: turn on dirty_bitmaps for the compressed writes 2016-09-05 19:06:48 +02:00
iscsi.c iscsi: Switch .bdrv_co_discard() to byte-based 2016-07-20 14:24:25 +01:00
linux-aio.c linux-aio: process completions from ioq_submit() 2016-09-13 11:00:56 +01:00
Makefile.objs replication: Implement new driver for block replication 2016-09-13 11:00:56 +01:00
mirror.c mirror: auto complete active commit 2016-09-13 11:00:56 +01:00
nbd-client.c nbd: Convert to byte-based interface 2016-07-20 14:24:25 +01:00
nbd-client.h nbd: Limit nbdflags to 16 bits 2016-08-03 18:44:56 +02:00
nbd.c block/nbd: Store runtime option values 2016-08-15 15:52:29 +02:00
nfs.c coroutine: move entry argument to qemu_coroutine_create 2016-07-13 13:26:02 +02:00
null.c block/null: Implement bdrv_refresh_filename() 2016-06-16 15:20:37 +02:00
parallels.c block/parallels: check new image size 2016-08-05 09:59:06 +01:00
qapi.c qapi: Add new visit_complete() function 2016-07-06 10:52:04 +02:00
qcow2-cache.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
qcow2-cluster.c qcow2: avoid memcpy(dst, NULL, len) 2016-09-13 11:00:55 +01:00
qcow2-refcount.c block: Convert bdrv_discard() to byte-based 2016-07-20 14:11:55 +01:00
qcow2-snapshot.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
qcow2.c qcow2: avoid memcpy(dst, NULL, len) 2016-09-13 11:00:55 +01:00
qcow2.h Remove unused function declarations 2016-09-15 15:32:22 +03:00
qcow.c qcow: cleanup qcow_co_pwritev_compressed to avoid the recursion 2016-09-05 19:06:48 +02:00
qed-check.c qed: Use DIV_ROUND_UP 2016-06-07 18:19:24 +03:00
qed-cluster.c block: Clean up includes 2016-01-20 13:36:23 +01:00
qed-gencb.c block: Clean up includes 2016-01-20 13:36:23 +01:00
qed-l2-cache.c block: Clean up includes 2016-01-20 13:36:23 +01:00
qed-table.c block: Convert bdrv_aio_writev() to BdrvChild 2016-07-05 16:46:26 +02:00
qed.c coroutine: move entry argument to qemu_coroutine_create 2016-07-13 13:26:02 +02:00
qed.h util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
quorum.c block: Convert bdrv_aio_writev() to BdrvChild 2016-07-05 16:46:26 +02:00
raw_bsd.c raw_bsd: Convert to byte-based interface 2016-07-20 14:24:25 +01:00
raw-posix.c block: Convert .bdrv_aio_discard() to byte-based 2016-07-20 14:11:55 +01:00
raw-win32.c raw-posix: Switch paio_submit() to byte-based 2016-07-20 14:11:55 +01:00
rbd.c block: Convert .bdrv_aio_discard() to byte-based 2016-07-20 14:11:55 +01:00
replication.c replication: Implement new driver for block replication 2016-09-13 11:00:56 +01:00
sheepdog.c sheepdog: Switch .bdrv_co_discard() to byte-based 2016-07-20 14:24:25 +01:00
snapshot.c error: Remove NULL checks on error_propagate() calls 2016-06-20 16:38:13 +02:00
ssh.c block/ssh: Use QemuOpts for runtime options 2016-08-15 15:52:28 +02:00
stream.c Improve block job rate limiting for small bandwidth values 2016-07-13 13:41:38 +02:00
throttle-groups.c block: Move I/O throttling configuration functions to BlockBackend 2016-05-19 16:45:30 +02:00
trace-events trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
vdi.c block: Convert bdrv_co_preadv/pwritev to BdrvChild 2016-07-05 16:46:27 +02:00
vhdx-endian.c qemu-common: stop including qemu/bswap.h from qemu-common.h 2016-05-19 16:42:28 +02:00
vhdx-log.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
vhdx.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
vhdx.h block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec 2014-12-12 15:42:22 +00:00
vmdk.c vmdk: add vmdk_co_pwritev_compressed 2016-09-05 19:06:48 +02:00
vpc.c block: Convert bdrv_co_preadv/pwritev to BdrvChild 2016-07-05 16:46:27 +02:00
vvfat.c vvfat: Fix qcow write target driver specification 2016-07-13 13:41:39 +02:00
win32-aio.c linux-aio: share one LinuxAioState within an AioContext 2016-07-18 15:09:31 +01:00
write-threshold.c block: Clean up includes 2016-01-20 13:36:23 +01:00