Commit Graph

25599 Commits

Author SHA1 Message Date
KONRAD Frederic c19f806e01 virtio-scsi: cleanup: remove qdev field.
The qdev field is no longer needed. Just drop it.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-11-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic 763684befd virtio-scsi: cleanup: init and exit functions.
This remove old init and exit function as they are no longer needed.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-10-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic 0ac8e13927 virtio-scsi: cleanup: use QOM casts.
As the virtio-scsi-pci and virtio-scsi-s390 are switched to the new API,
we can use QOM casts.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-9-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic c908ea1052 virtio-scsi-ccw: switch to new API
Here the virtio-scsi-ccw is modified for the new API. The device
virtio-scsi-ccw extends virtio-ccw-device as before. It creates and
connects a virtio-scsi during the init. The properties are not modified.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-8-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic 9ef13d8f19 virtio-scsi-s390: switch to the new API.
Here the virtio-scsi-s390 is modified for the new API. The device
virtio-scsi-s390 extends virtio-s390-device as before. It creates and
connects a virtio-scsi during the init. The properties are not modified.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-7-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic bc7b90a010 virtio-scsi-pci: switch to new API.
Here the virtio-scsi-pci is modified for the new API. The device virtio-scsi-pci
extends virtio-pci. It creates and connects a virtio-scsi during the init.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-6-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic 3ab1dfdd50 virtio-scsi: add the virtio-scsi device.
Create virtio-scsi which extends virtio-device, so it can be connected on
virtio-bus.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-5-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:36 -05:00
KONRAD Frederic 4bfeb18a45 virtio-scsi: moving host_features from properties to transport properties.
host_features field is part of the transport device. So move all the
host_features related properties into transport device.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-4-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:35 -05:00
KONRAD Frederic 22219527f4 virtio-scsi: allocate cmd_vqs array separately.
Allocate/Free the cmd_vqs array separately to have a fixed size device.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-3-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:34 -05:00
KONRAD Frederic 394e2e4c59 virtio-scsi: don't use pointer for configuration.
The configuration field must not be a pointer as it will be used for virtio-scsi
properties. So *conf is replaced by conf.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-id: 1363875320-7985-2-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26 09:26:34 -05:00
Anthony Liguori 2fd1a053e3 Merge remote-tracking branch 'luiz/queue/qmp' into staging
# By Corey Bryant (2) and others
# Via Luiz Capitulino
* luiz/queue/qmp:
  New QMP command query-cpu-max and HMP command cpu_max
  qmp: fix handling of boolean values in qmp-shell
  QMP: TPM QMP and man page documentation updates
  QMP: Remove duplicate TPM type from query-tpm
2013-03-26 09:25:45 -05:00
Michal Novotny 4d700430a2 New QMP command query-cpu-max and HMP command cpu_max
These commands return the maximum number of CPUs supported by the
currently running emulator instance, as defined in its QEMUMachine
struct.

Signed-off-by: Michal Novotny <minovotn@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-03-25 16:21:33 -04:00
Igor Mammedov e5ecec7bad qmp: fix handling of boolean values in qmp-shell
qmp-shell converts only integer arguments and the rest
is assumed to be strings which are faithfully sent as
quoted strings by json. But QEMU refuses to accept qmp
command with boolean argument whose value is escaped
as string.

Fix it by special-casing true/false keywords and store
value as corresponding boolean.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-03-25 16:21:33 -04:00
Corey Bryant 28c4fa32bd QMP: TPM QMP and man page documentation updates
Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-03-25 16:21:33 -04:00
Corey Bryant 88ca7bcff1 QMP: Remove duplicate TPM type from query-tpm
Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-03-25 16:21:33 -04:00
Anthony Liguori dcadaa9b40 Merge remote-tracking branch 'stefanha/net' into staging
# By Dmitry Fleytman (5) and others
# Via Stefan Hajnoczi
* stefanha/net:
  net: increase buffer size to accommodate Jumbo frame pkts
  VMXNET3 device implementation
  Packet abstraction for VMWARE network devices
  Common definitions for VMWARE devices
  net: iovec checksum calculator
  Checksum-related utility functions
  net: use socket_set_nodelay() for -netdev socket
2013-03-25 13:14:26 -05:00
Anthony Liguori 4b5805de49 Merge remote-tracking branch 'stefanha/block' into staging
# By Liu Yuan (1) and Stefan Weil (1)
# Via Stefan Hajnoczi
* stefanha/block:
  block: Add options QDict to bdrv_file_open() prototypes (fix MinGW build)
  rbd: fix compile error
2013-03-25 13:14:20 -05:00
Anthony Liguori d2f38a0acb Merge remote-tracking branch 'kraxel/ipxe.3' into staging
# By Gerd Hoffmann
# Via Gerd Hoffmann
* kraxel/ipxe.3:
  ipxe: update binaries
  ipxe: disable two second timeout
2013-03-25 13:13:53 -05:00
Anthony Liguori d63c9477e0 glib: add a compatibility interface for g_timeout_add_seconds
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-25 13:10:40 -05:00
Jan Kiszka 6db253caf8 gtk: Release modifier when graphic console loses keyboard focus
This solves, e.g., sticky ALT when selecting a GTK menu, switching to a
different window or selecting a different virtual console.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-id: 514F417A.6010908@web.de
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-25 13:10:40 -05:00
Scott Feldman d32fcad366 net: increase buffer size to accommodate Jumbo frame pkts
Socket buffer sizes were hard-coded to 4K for VDE and socket netdevs.  Bump this
up to 68K (ala tap netdev) to handle maximum GSO packet size (64k) plus plenty
of room for the ethernet and virtio_net headers.

Originally, ran into this limitation when using -netdev UDP sockets to connect
VM-to-VM, where VM interface is configure with MTU=9000.  (Using virtio_net
NIC model).  Test is simple: ping -M do -s 8500 <target>.  This test will
attempt to ping with unfragmented packet of given size.  Without patch, size
is limited to < 4K (minus protocol hdrs).  With patch, ping test works with pkt
size up to 9000 (again, minus protocol hdrs).

v2: per Stefan, increase buf size to (4096+65536) as done in tap and apply
    to vde and socket netdevs.
v1: increase buf size to 12K just for -netdev UDP sockets

Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 11:14:07 +01:00
Dmitry Fleytman 786fd2b0f8 VMXNET3 device implementation
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 11:13:10 +01:00
Dmitry Fleytman e263cd49c7 Packet abstraction for VMWARE network devices
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 11:13:10 +01:00
Dmitry Fleytman 75020a7021 Common definitions for VMWARE devices
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 11:13:10 +01:00
Dmitry Fleytman 8402630169 net: iovec checksum calculator
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 11:13:10 +01:00
Dmitry Fleytman 5acf5ea4bc Checksum-related utility functions
net_checksum_add_cont()
checksum calculation for scattered data with odd chunk sizes

net_raw_checksum()
checksum calculation for a buffer

Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 11:13:09 +01:00
Stefan Hajnoczi 20048d0a12 net: use socket_set_nodelay() for -netdev socket
Reduce -netdev socket latency by disabling the Nagle algorithm on
SOCK_STREAM sockets in net/socket.c.  Since we are tunelling Ethernet
over TCP we shouldn't artificially delay outgoing packets, let the guest
decide packet scheduling.

I already get sub-millisecond -netdev socket ping times on localhost, so
there was no measurable difference in my testing.  This won't hurt
though and may improve remote socket performance.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
2013-03-25 11:13:09 +01:00
Stefan Weil ea804cadf8 block: Add options QDict to bdrv_file_open() prototypes (fix MinGW build)
The new parameter is unused yet.

This part was missing in commit 787e4a8500.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 09:53:04 +01:00
Liu Yuan d43731c758 rbd: fix compile error
Commit 787e4a85 [block: Add options QDict to bdrv_file_open() prototypes] didn't
update rbd.c accordingly.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25 09:51:43 +01:00
Gerd Hoffmann 0099cd43ec ipxe: update binaries
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-25 09:13:18 +01:00
Gerd Hoffmann 95ca557d5c ipxe: disable two second timeout
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-25 09:07:40 +01:00
Anthony Green fe6344a05f Remove device_tree.o from hw/moxie/Makefile.objs.
Here's a fix for the build problem identified by Aurelien Jarno here:
http://lists.gnu.org/archive/html/qemu-devel/2013-03/msg04177.html

Signed-off-by: Anthony Green <green@moxielogic.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-03-24 11:30:04 +01:00
Richard Henderson 2d497542e1 tcg-optimize: Fold sub r,0,x to neg r,x
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:31:03 +00:00
Richard Henderson 4980ef9e3e target-i386: Don't modify env->eflags around cpu_dump_state
We can compute the value in cpu_dump_state anyway, and gratuitous
modifications to eflags creates heisenbugs.

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:30:12 +00:00
Richard Henderson c53de1a289 target-i386: Fix flags computation for ADOX
When starting from CC_OP_DYNAMIC, and issuing adox before adcx,
a typo used the wrong value for the resulting CC_OP.

Cc: Blue Swirl <blauwirbel@gmail.com>
Reported-by: Torbjorn Granlund <tg@gmplib.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:26:52 +00:00
Anthony Green d15a9c2390 Add top level changes for moxie
Signed-off-by: Anthony Green <green@moxielogic.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:25:42 +00:00
Anthony Green a360d96582 Add sample moxie system
Signed-off-by: Anthony Green <green@moxielogic.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:25:41 +00:00
Anthony Green bd86a88eed Add moxie disassembler
Signed-off-by: Anthony Green <green@moxielogic.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:25:41 +00:00
Anthony Green 525bd324c2 Add moxie target code
Signed-off-by: Anthony Green <green@moxielogic.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-23 14:25:41 +00:00
Blue Swirl f7c61bf8fc Merge branch 'for-upstream' of git://github.com/mwalle/qemu
* 'for-upstream' of git://github.com/mwalle/qemu:
  configure: rename OpenGL feature to GLX
  configure: proper OpenGL/GLX probe
  target-lm32: use HELPER() macro
  target-lm32: flush tlb after clearing env
  target-lm32: remove dead code
  target-lm32: fix cmpgui and cmpgeui opcodes
  tests: tcg: lm32: add more test cases
  target-lm32: don't log cpu state in translation
  lm32_uart: fix receive buffering
  milkymist-uart: fix receive buffering
  lm32-dis: fix NULL pointer dereference
  target-lm32: fix debug memory access
2013-03-23 14:23:26 +00:00
Aurelien Jarno d76bb73549 Merge branch 'ppc-for-upstream' of git://github.com/agraf/qemu
* 'ppc-for-upstream' of git://github.com/agraf/qemu: (58 commits)
  target-ppc: Use NARROW_MODE macro for tlbie
  target-ppc: Use NARROW_MODE macro for addresses
  target-ppc: Use NARROW_MODE macro for comparisons
  target-ppc: Use NARROW_MODE macro for branches
  target-ppc: Fix add and subf carry generation in narrow mode
  target-ppc: Use QOM method dispatch for MMU fault handling
  target-ppc: Move ppc tlb_fill implementation into mmu_helper.c
  target-ppc: Split user only code out of mmu_helper.c
  mmu-hash64: Implement Virtual Page Class Key Protection
  mmu-hash*: Merge translate and fault handling functions
  mmu-hash*: Don't use full ppc_hash{32, 64}_translate() path for get_phys_page_debug()
  mmu-hash*: Correctly mask RPN from hash PTE
  mmu-hash*: Clean up real address calculation
  mmu-hash*: Clean up PTE flags update
  mmu-hash64: Factor SLB N bit into permissions bits
  mmu-hash*: Clean up permission checking
  mmu-hash32: Remove nx from context structure
  mmu-hash*: Don't update PTE flags when permission is denied
  mmu-hash32: Don't look up page tables on BAT permission error
  mmu-hash32: Cleanup BAT lookup
  ...
2013-03-22 21:43:57 +01:00
Yeongkyoon Lee 52ae646d4a tcg: Fix occasional TCG broken problem when ldst optimization enabled
is_tcg_gen_code() checks the upper limit of TCG generated code range wrong, so
that TCG could get broken occasionally only when CONFIG_QEMU_LDST_OPTIMIZATION
enabled. The reason is code_gen_buffer_max_size does not cover the upper range
up to (TCG_MAX_OP_SIZE * OPC_BUF_SIZE), thus code_gen_buffer_max_size should be
modified to code_gen_buffer_size.

CC: qemu-stable@nongnu.org
Signed-off-by: Yeongkyoon Lee <yeongkyoon.lee@samsung.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-03-22 21:38:21 +01:00
Anthony Liguori 3f08ffb4a4 Merge remote-tracking branch 'kwolf/for-anthony' into staging
# By Kevin Wolf (12) and Peter Lieven (2)
# Via Kevin Wolf
* kwolf/for-anthony:
  nbd: Check against invalid option combinations
  nbd: Use default port if only host is specified
  block: Allow omitting the file name when using driver-specific options
  block: Make find_image_format safe with NULL filename
  block: Rename variable to avoid shadowing
  block: Introduce .bdrv_parse_filename callback
  nbd: Accept -drive options for the network connection
  nbd: Remove unused functions
  nbd: Keep hostname and port separate
  qemu-socket: Make socket_optslist public
  block: Pass bdrv_file_open() options to block drivers
  block: Add options QDict to bdrv_file_open() prototypes
  block: complete all IOs before resizing a device
  Revert "block: complete all IOs before .bdrv_truncate"
2013-03-22 13:08:01 -05:00
Anthony Liguori cecd77ae6d Merge remote-tracking branch 'stefanha/trivial-patches' into staging
# By liguang (2) and others
# Via Stefan Hajnoczi
* stefanha/trivial-patches:
  qdev: remove redundant abort()
  gitignore: ignore more files
  Use proper term in TCG README
  serial: Fix debug format strings
  Fix typos and misspellings
  Advertise --libdir in configure --help output
  memory: fix a bug of detection of memory region collision
  MinGW: Replace setsockopt by qemu_setsocketopt
2013-03-22 13:05:57 -05:00
Anthony Liguori f930820704 Merge remote-tracking branch 'cohuck/virtio-ccw-upstr' into staging
# By Cornelia Huck
# Via Cornelia Huck
* cohuck/virtio-ccw-upstr:
  virtio-ccw, s390-virtio: Use generic virtio-blk macro.
  s390-virtio, virtio-ccw: Add config_wce for virtio-blk.
  virtio-ccw: Add missing blk chs properties.
2013-03-22 13:05:50 -05:00
Kevin Wolf 681e7ad024 nbd: Check against invalid option combinations
A file name may only specified if no host or socket path is specified.
The latter two may not appear at the same time either.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22 17:51:32 +01:00
Kevin Wolf bebbf7fa9c nbd: Use default port if only host is specified
The URL method already takes care to apply the default port when none is
specfied. Directly specifying driver-specific options required the port
number until now. Allow leaving it out and apply the default.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22 17:51:32 +01:00
Kevin Wolf c2ad1b0c46 block: Allow omitting the file name when using driver-specific options
After this patch, using -drive with an empty file name continues to open
the file if driver-specific options are used. If no driver-specific
options are specified, the semantics stay as it was: It defines a drive
without an inserted medium.

In order to achieve this, bdrv_open() must be made safe to work with a
NULL filename parameter. The assumption that is made is that only block
drivers which implement bdrv_parse_filename() support using driver
specific options and could therefore work without a filename. These
drivers must make sure to cope with NULL in their implementation of
.bdrv_open() (this is only NBD for now). For all other drivers, the
block layer code will make sure to error out before calling into their
code - they can't possibly work without a filename.

Now an NBD connection can be opened like this:

  qemu-system-x86_64 -drive file.driver=nbd,file.port=1234,file.host=::1

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22 17:51:32 +01:00
Kevin Wolf f5866fa438 block: Make find_image_format safe with NULL filename
In order to achieve this, the .bdrv_probe callbacks of all drivers must
cope with this. The DMG driver is the only one that bases its decision
on the filename and it needs to be changed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22 17:51:32 +01:00
Kevin Wolf 08b392e151 block: Rename variable to avoid shadowing
bdrv_open() uses two different variables called options. Rename one of
them to avoid confusion and to allow the outer one to be accessed
everywhere.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22 17:51:32 +01:00