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Hani Benhabiles 60fe4fac22 nbd: Don't export a block device with no medium. 
The device is exported with erroneous values and can't be read.

Before the patch:
$ sudo nbd-client localhost -p 10809 /dev/nbd0 -name floppy0
Negotiation: ..size = 17592186044415MB
bs=1024, sz=18446744073709547520 bytes

$ sudo mount /dev/nbd0 /mnt/tmp/
mount: block device /dev/nbd0 is write-protected, mounting read-only
mount: /dev/nbd0: can't read superblock

After the patch:
(qemu) nbd_server_add ide0-hd0
(qemu) nbd_server_add floppy0
Device 'floppy0' has no medium

Signed-off-by: Hani Benhabiles <kroosec@gmail.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-27 16:06:48 +02:00
audio
audio: Drop superfluous conditionals around g_free()
2014-06-13 12:34:54 +02:00
backends
rng-random: NULL check not needed before g_free()
2014-06-24 20:01:24 +04:00
block
Fix new typos (found by codespell)
2014-06-24 20:01:24 +04:00
bsd-user
bsd-user: Fix syscall format, add strace support for more syscalls
2014-06-11 00:25:06 +01:00
default-configs
pc: implement pc-dimm device abstraction
2014-06-19 16:41:47 +03:00
disas
disas/libvixl: Update to libvixl 1.4
2014-05-13 16:09:35 +01:00
docs
qapi event: convert QUORUM events
2014-06-23 11:12:28 -04:00
dtc @ bc895d6d09
…
fpu
fpu: softfloat: drop INLINE macro
2014-06-23 11:00:12 -04:00
fsdev
…
gdb-xml
…
hw
hw/moxie/moxiesim.c: Remove unused moxie_intc_create()
2014-06-24 20:01:24 +04:00
include
migration/next for 20140623
2014-06-24 15:33:42 +01:00
libcacard
vscclient: Add required headers to fix build on FreeBSD
2014-06-24 20:01:24 +04:00
libdecnumber
libdecnumber: Fix decNumberSetBCD
2014-06-16 13:24:29 +02:00
linux-headers
linux-headers: update linux headers to kvm/next
2014-06-16 13:24:41 +02:00
linux-user
Add support for the arm breakpoint syscall
2014-06-24 20:01:24 +04:00
net
Add the vhost-user netdev backend to the command line
2014-06-19 18:44:18 +03:00
pc-bios
pc-bios/s390-ccw: update s390-ccw.img binary
2014-06-23 14:19:45 +02:00
pixman @ 97336fad32
…
po
…
qapi
Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging
2014-06-24 13:06:13 +01:00
qga
qga: Fix handle fd leak in acquire_privilege()
2014-06-03 15:07:59 -05:00
qobject
json-lexer: fix escaped backslash in single-quoted string
2014-06-23 11:01:24 -04:00
qom
qom: introduce object_property_get_enum and object_property_get_uint16List
2014-06-19 18:44:19 +03:00
roms
Update OpenBIOS images
2014-06-20 23:59:19 +01:00
scripts
migration/next for 20140623
2014-06-24 15:33:42 +01:00
slirp
Increase maximum number of session of the internal TFTP server.
2014-06-24 20:01:24 +04:00
stubs
Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging
2014-06-24 13:06:13 +01:00
sysconfigs/target
…
target-alpha
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
target-arm
Fix new typos (found by codespell)
2014-06-24 20:01:24 +04:00
target-cris
target-cris/translate.c: Remove _t_gen_mov_TN_env and _t_gen_mov_env_TN
2014-06-09 01:04:44 +02:00
target-i386
target-i386: Broadwell CPU model
2014-06-25 23:54:57 +02:00
target-lm32
vl: allow other threads to do qemu_system_vmstop_request
2014-06-23 16:36:13 +08:00
target-m68k
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
target-microblaze
target-microblaze: Delete unused sign_extend() function
2014-06-10 19:39:34 +04:00
target-mips
target-mips: copy CP0_Config1 into DisasContext
2014-06-20 22:14:13 +02:00
target-moxie
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
target-openrisc
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
target-ppc
target-ppc: Fix compiler warning
2014-06-24 20:01:24 +04:00
target-s390x
target-s390x: Remove unused ld_code6() function
2014-06-24 20:01:24 +04:00
target-sh4
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
target-sparc
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
target-unicore32
target-unicore: Remove unused functions
2014-06-24 20:01:24 +04:00
target-xtensa
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
tcg
tcg/ppc: Fix failure in tcg_out_mem_long
2014-06-27 13:23:41 +01:00
tests
Fix new typos (found by codespell)
2014-06-24 20:01:24 +04:00
trace
glib-compat.h: add new thread API emulation on top of pre-2.31 API
2014-06-10 07:44:01 +02:00
ui
qemu-char: introduce qemu_chr_alloc
2014-06-23 11:12:28 -04:00
util
Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging
2014-06-24 13:06:13 +01:00
.exrc
…
.gitignore
configure: Put tempfiles in a subdir of the build directory
2014-05-24 00:34:38 +04:00
.gitmodules
PPC: Add u-boot firmware for e500
2014-06-16 13:24:35 +02:00
.mailmap
…
.travis.yml
trace: Multi-backend tracing
2014-06-09 15:43:40 +02:00
aio-posix.c
…
aio-win32.c
…
arch_init.c
migration: catch unknown flags in ram_load
2014-06-16 04:55:27 +02:00
async.c
aio: fix qemu_bh_schedule() bh->ctx race condition
2014-06-04 09:56:06 +02:00
balloon.c
qapi event: convert BALLOON_CHANGE
2014-06-23 11:12:28 -04:00
block-migration.c
block: fix wrong order in live block migration setup
2014-06-04 11:22:39 +02:00
block.c
block.c: Remove useless 'buf' variable
2014-06-24 20:01:24 +04:00
blockdev-nbd.c
nbd: Don't export a block device with no medium.
2014-06-27 16:06:48 +02:00
blockdev.c
qapi event: convert other BLOCK_JOB events
2014-06-23 11:12:28 -04:00
blockjob.c
qapi event: convert other BLOCK_JOB events
2014-06-23 11:12:28 -04:00
bt-host.c
…
bt-vhci.c
…
Changelog
…
CODING_STYLE
…
configure
configure: Enable TPM by default, add --disable-tpm
2014-06-24 20:01:24 +04:00
COPYING
…
COPYING.LIB
…
coroutine-gthread.c
glib-compat.h: add new thread API emulation on top of pre-2.31 API
2014-06-10 07:44:01 +02:00
coroutine-sigaltstack.c
…
coroutine-ucontext.c
…
coroutine-win32.c
coroutine-win32.c: Add noinline attribute to work around gcc bug
2014-06-26 14:08:14 +01:00
cpu-exec.c
cpu: make CPU_INTERRUPT_RESET available on all targets
2014-05-13 13:21:51 +02:00
cpus.c
qapi event: convert STOP
2014-06-23 11:01:25 -04:00
cputlb.c
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
device_tree.c
…
device-hotplug.c
blockdev: Remove unused DriveInfo reference count
2014-06-16 17:23:19 +08:00
disas.c
monitor: QEMU Monitor Instruction Disassembly Incorrect for PowerPC LE Mode
2014-06-16 13:24:26 +02:00
dma-helpers.c
dma-helpers: avoid calling dma_bdrv_unmap() twice
2014-05-24 00:28:43 +04:00
dump.c
dump: Make DumpState and endian conversion routines available for arch-specific dump code
2014-06-16 13:24:36 +02:00
exec.c
tcg-ppc: Merge cache-utils into the backend
2014-06-23 07:32:30 -07:00
gdbstub.c
…
HACKING
…
hmp-commands.hx
Add the vhost-user netdev backend to the command line
2014-06-19 18:44:18 +03:00
hmp.c
Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging
2014-06-24 13:06:13 +01:00
hmp.h
hmp: add info memdev
2014-06-19 18:44:21 +03:00
iohandler.c
iohandler.c: Properly initialize sigaction struct
2014-05-24 00:07:29 +04:00
ioport.c
…
iothread.c
…
kvm-all.c
Merge remote-tracking branch 'remotes/kvm/uq/master' into staging
2014-06-20 19:25:18 +01:00
kvm-stub.c
Add kvm_eventfds_enabled function
2014-06-19 16:41:54 +03:00
LICENSE
…
main-loop.c
…
MAINTAINERS
Merge remote-tracking branch 'remotes/kvm/uq/master' into staging
2014-06-20 19:25:18 +01:00
Makefile
build-sys: introduce install-prog macro to install&strip binaries and use it
2014-06-24 20:01:24 +04:00
Makefile.objs
qapi script: add event support
2014-06-23 11:01:25 -04:00
Makefile.target
build-sys: introduce install-prog macro to install&strip binaries and use it
2014-06-24 20:01:24 +04:00
memory_mapping.c
…
memory.c
hostmem: add property to map memory with MAP_SHARED
2014-06-19 18:44:20 +03:00
migration-exec.c
…
migration-fd.c
…
migration-rdma.c
rdma: bug fixes
2014-06-23 19:09:50 +02:00
migration-tcp.c
…
migration-unix.c
…
migration.c
migration: catch unknown flags in ram_load
2014-06-16 04:55:27 +02:00
module-common.c
…
monitor.c
Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging
2014-06-24 13:06:13 +01:00
nbd.c
nbd: Miscellaneous typo fixes.
2014-05-24 00:07:29 +04:00
numa.c
numa: handle mmaped memory allocation failure correctly
2014-06-19 18:44:22 +03:00
os-posix.c
…
os-win32.c
…
page_cache.c
migration: Plug memory leak in migrate-set-cache-size command
2014-06-10 19:54:43 +04:00
qapi-event.json
qapi event: convert QUORUM events
2014-06-23 11:12:28 -04:00
qapi-schema.json
Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging
2014-06-24 13:06:13 +01:00
qdev-monitor.c
qdev: Implement named GPIOs
2014-05-28 17:36:21 +02:00
qdict-test-data.txt
…
qemu-bridge-helper.c
…
qemu-char.c
qemu-char: initialize chr_write_lock
2014-06-26 13:13:54 +01:00
qemu-coroutine-io.c
…
qemu-coroutine-lock.c
…
qemu-coroutine-sleep.c
…
qemu-coroutine.c
…
qemu-doc.texi
…
qemu-file.c
…
qemu-img-cmds.hx
…
qemu-img.c
cleanup QEMUOptionParameter
2014-06-16 17:23:21 +08:00
qemu-img.texi
qemu-img: Document check exit codes
2014-06-04 11:30:32 +02:00
qemu-io-cmds.c
…
qemu-io.c
trace: Multi-backend tracing
2014-06-09 15:43:40 +02:00
qemu-log.c
…
qemu-nbd.c
qemu-nbd: Don't use qerror_report()
2014-05-28 14:28:46 +02:00
qemu-nbd.texi
nbd: Miscellaneous typo fixes.
2014-05-24 00:07:29 +04:00
qemu-options-wrapper.h
…
qemu-options.h
…
qemu-options.hx
migration: dump vmstate info as a json file for static analysis
2014-06-23 19:14:50 +02:00
qemu-seccomp.c
…
qemu-tech.texi
…
qemu-timer.c
vl.c: remove init_clocks call from main
2014-05-09 20:57:32 +02:00
qemu.nsi
…
qemu.sasl
…
qmp-commands.hx
qmp: add query-acpi-ospm-status command
2014-06-19 18:44:22 +03:00
qmp.c
qmp: add query-acpi-ospm-status command
2014-06-19 18:44:22 +03:00
qtest.c
qtest: fix hex2nib for capital characters
2014-06-10 19:39:34 +04:00
README
…
rules.mak
build-sys: introduce install-prog macro to install&strip binaries and use it
2014-06-24 20:01:24 +04:00
savevm.c
savevm: check vmsd for migratability status
2014-06-25 23:54:57 +02:00
softmmu_template.h
softmmu: move softmmu_template.h out of include/
2014-06-05 16:10:33 +02:00
spice-qemu-char.c
qemu-char: introduce qemu_chr_alloc
2014-06-23 11:12:28 -04:00
tcg-runtime.c
tcg: Push tcg-runtime routines into exec/helper-*
2014-05-28 09:33:54 -07:00
tci.c
Merge remote-tracking branch 'remotes/bonzini/softmmu-smap' into staging
2014-06-05 21:06:14 +01:00
thread-pool.c
aio: Fix use-after-free in cancellation path
2014-05-28 14:28:46 +02:00
thunk.c
…
tpm.c
…
trace-events
trace: pc: add PC_DIMM slot & address allocation
2014-06-19 16:41:50 +03:00
translate-all.c
Fix new typos (found by codespell)
2014-06-24 20:01:24 +04:00
translate-all.h
…
user-exec.c
softmmu: introduce cpu_ldst.h
2014-06-05 16:10:33 +02:00
VERSION
…
version.rc
…
vl.c
migration/next for 20140623
2014-06-24 15:33:42 +01:00
vmstate.c
vmstate: Return error in case of error
2014-06-23 19:14:52 +02:00
xbzrle.c
…
xen-common-stub.c
…
xen-common.c
…
xen-hvm-stub.c
xen-hvm: Fix xen_hvm_init() to adjust pc memory layout
2014-06-23 17:50:04 +03:00
xen-hvm.c
xen-hvm: Handle machine opt max-ram-below-4g
2014-06-23 18:02:55 +03:00
xen-mapcache.c
…

README 

Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org

- QEMU team
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