timers: the rearm function should be able to handle delta = INT64_MAX
Fix win32_rearm_timer and mm_rearm_timer: they should be able to handle
INT64_MAX as a delta parameter without overflowing.
Also, the next deadline in ms should be calculated rounding down rather
than up (see unix_rearm_timer and dynticks_rearm_timer).
Finally ChangeTimerQueueTimer takes an unsigned long and timeSetEvent
takes an unsigned int as delta, so cast the ms delta to the appropriate
unsigned integer.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Stefan Weil [Fri, 13 Apr 2012 20:24:42 +0000 (22:24 +0200)]
sdl: Add QEMU mascot icon for use with SDL
This is a bitmap file (32x32x4) derived from the official QEMU mascot
(which was designed by Benoît Canet). I stripped the text from the SVG
to get a nearly square image and converted the result to BMP without
any manual optimization.
The bitmap is currently used by QEMU's SDL interface and replaces the
default X icon.
v2: Add qemu-icon.bmp to Makefile.
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Anthony Liguori [Wed, 18 Apr 2012 22:33:15 +0000 (17:33 -0500)]
pc-sysfw: make sure to call qdev_init
We're not actually calling qdev_init for the pc-sysfw device. Since we create
the canonical path during realize, this was causing an assert to trigger when
attempting to read a link pointing to pc-sysfw.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
It's identical to the hda-duplex codec, except that it advertises the
input as microphone instead of line-in and the output as speaker instead
of line-out. Some guest apps (microsoft netmeeting being one) are picky
when it comes to selecting the recording source and don't accept
line-in, so give them what they expect.
Amit Shah [Tue, 24 Apr 2012 14:03:59 +0000 (19:33 +0530)]
virtio-serial-bus: Unset guest_connected at reset and driver reset
When a guest driver resets the virtio status to not ready, or when qemu
is reset, reset all ports' guest_connected bit and let port users know
of this event if they have the guest_close() callback registered.
Reviewed-by: Alon Levy <alevy@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
Alon Levy [Mon, 23 Apr 2012 15:23:10 +0000 (18:23 +0300)]
virtio-serial-bus: fix guest_connected init before driver init
guest_connected should be false before guest driver initialization, and
true after, both for multiport aware and non multiport aware drivers.
Don't set it before the guest_features are available; instead use
set_status which is called by io to VIRTIO_PCI_STATUS with
VIRTIO_CONFIG_S_DRIVER_OK by even older non multiport drivers.
[Amit: Add comment, tweak summary, only set guest_connected and not
reset it as a side-effect.]
Signed-off-by: Alon Levy <alevy@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
Peter Chubb [Fri, 20 Apr 2012 05:32:30 +0000 (15:32 +1000)]
Limit ptimer rate to something achievable
If a guest sets very short timeouts, and asks for a timer to be reloaded on
timeout, QEMU can go to 100%CPU utilisation and become unresponsive,
as it is spending all its time generating timeout interrupts. On real
hardware this doesn't matter, as the interrupts are just coalesced,
and the effect is to have the interrupt asserted all the time.
This patch is a band-aid, that prevents timeouts less than 10
microseconds from being set. 10 microseconds is a limit that was
determined empirically on a variety of machines as the shortest that
allowed QEMU to pick up a control-a c sequence to get at the monitor.
Reported-by: Anna Lyons <anna.lyons@nicta.com.au> Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Andreas Färber [Thu, 5 Apr 2012 11:21:46 +0000 (13:21 +0200)]
qom: Refine container_get() to allow using a custom root
Specify the root to search from as argument. This avoids hardcoding
"/machine" in some places and makes it more flexible.
Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Sparc Debian 5.0.8 does not define __suseconds_t as long,
but FMT_timeval expects %ld.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Cc: Anthony Liguori <aliguori@us.ibm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Stefan Weil [Thu, 19 Apr 2012 20:27:14 +0000 (22:27 +0200)]
qemu-char: Fix crash when switching consoles
qemu-system-arm (and other system emulations) crashes with SDL when
the user switches consoles (Alt-Ctrl-F4).
We already check for NULL pointers in qemu_chr_fe_ioctl,
qemu_chr_be_can_write and other functions, so do this also
for s->chr_read in qemu_chr_be_write. This fixes the crash.
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
configure: change meaning of --datadir to Autoconf convention
Autoconf uses --datadir for the /usr/share directory, not the
program-specific subdirectory inside /usr/share. This changes configure
to match autoconf behavior.
Note that this will break compatibility with existing build scripts.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
As now that block handles only the prefix variable, the code can be much
simpler. This also removes the CONFIG_QEMU_PREFIX define as it is not
used by any C code.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This one will be kept because it is set directly by ./configure:
- CONFIG_QEMU_HELPERDIR
This patch keeps the 'prefix=*' (CONFIG_QEMU_PREFIX) pattern because
other variables may use $prefix on their config-host.mak definitions.
The remaining code will be simplified on a further patch.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
$confdir is a confusing name, as it's not clear if it's "the system
config dir" or "the Qemus-specific directory inside the config dir".
$qemu_confdir makes it more clear.
The current C code that uses CONFIG_QEMU_CONFDIR should be safe, as now
create_config generates the same #define name (CONFIG_QEMU_CONFDIR) for
both "confdir" and "qemu_confdir" variables.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Autoconf concept of "datadir" is supposed to be "$prefix/share", not
"$prefix/share/PACKAGE", so using datadir for the Qemu-specific
directory is confusing.
The current C code that uses CONFIG_QEMU_DATADIR should be safe, as now
create_config generates the same #define name (CONFIG_QEMU_DATADIR) for
both "datadir" and "qemu_datadir" variables.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
create_config: separate section for qemu_*dir variables (v2)
The generic *dir section will eventually go away and be replaced with
qemu_* section. By now, both sections will be kept, while the variables
get renamed on config-host.mak.
With this patch, a XXXdir variable will become a CONFIG_QEMU_XXXDIR
define, and a qemu_XXXdir variable will become CONFIG_QEMU_XXXDIR as
well (instead of becoming a CONFIG_QEMU_QEMU_XXXDIR define).
Changes v1 -> v2:
- Rebase on top of newer qemu.git changes, that changed
"tr '[:lower:]' '[:upper:]'" to "LC_ALL=C tr '[a-z]' '[A-Z]'".
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The autoconf "docdir" variable is used for the program-specific
subdirectory, but anyway it's better to make it clear that the variable
is used for the qemu-specific subdirectory path.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The variable is used for the qemu-specific directory and has a different
meaning of the autoconf "datadir" variable (that's used for the
$prefix/share directory, not for $prefix/share/PACKAGE).
This doesn't change behavior or interfaces, it's just an internal
variable rename.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Andreas Färber [Thu, 12 Apr 2012 00:34:40 +0000 (02:34 +0200)]
target-microblaze: QOM'ify CPU init
Move code from cpu_mb_init() to a QOM initfn.
Signed-off-by: Andreas Färber <afaerber@suse.de> Tested-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
[AF: Leave cpu_reset() call in cpu_mb_init()]
Andreas Färber [Thu, 12 Apr 2012 00:17:53 +0000 (02:17 +0200)]
target-microblaze: QOM'ify CPU
Embed CPUMBState as first member of QOM MicroBlazeCPU.
Let CPUClass::reset() call cpu_state_reset() for now.
Signed-off-by: Andreas Färber <afaerber@suse.de> Tested-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
[AF: Updated cpu.c to include cpu-qom.h indirectly via cpu.h]
Anthony Liguori [Mon, 23 Apr 2012 19:27:04 +0000 (14:27 -0500)]
Merge remote-tracking branch 'kwolf/for-anthony' into staging
* kwolf/for-anthony: (38 commits)
qemu-iotests: Fix test 031 for qcow2 v3 support
qemu-iotests: Add -o and make v3 the default for qcow2
qcow2: Zero write support
qemu-iotests: Test backing file COW with zero clusters
qemu-iotests: add a simple test for write_zeroes
qcow2: Support for feature table header extension
qcow2: Support reading zero clusters
qcow2: Version 3 images
qcow2: Ignore reserved bits in check_refcounts
qcow2: Ignore reserved bits in refcount table entries
qcow2: Simplify count_cow_clusters
qcow2: Refactor qcow2_free_any_clusters
qcow2: Ignore reserved bits in L1/L2 entries
qcow2: Fail write_compressed when overwriting data
qcow2: Ignore reserved bits in count_contiguous_clusters()
qcow2: Ignore reserved bits in get_cluster_offset
qcow2: Save disk size in snapshot header
Specification for qcow2 version 3
qcow2: Fix refcount block allocation during qcow2_alloc_cluster_at()
iotests: Resolve test failures caused by hostname
...
Anthony Liguori [Mon, 23 Apr 2012 16:49:59 +0000 (11:49 -0500)]
Merge remote-tracking branch 'origin/master' into staging
* origin/master: (27 commits)
target-arm: Move reset handling to arm_cpu_reset
target-arm: Drop cpu_reset_model_id()
target-arm: Move cache ID register setup to cpu specific init fns
target-arm: Move OMAP cp15_i_{max,min} reset to cpu_state_reset
target-arm: Move feature register setup to per-CPU init fns
target-arm: Move iWMMXT wCID reset to cpu_state_reset
target-arm: Drop JTAG_ID documentation
target-arm: Move SCTLR reset value setup to per cpu init fns
target-arm: Move CTR setup to per cpu init fns
target-arm: Move MVFR* setup to per cpu init fns
target-arm: Move FPSID config to cpu init fns
target-arm: Move feature bit settings to CPU init fns
target-arm: Add QOM subclasses for each ARM cpu implementation
target-arm: remind to keep arm features in sync with linux-user/elfload.c
tci: GETPC() macro must return an uintptr_t
gdbstub: Synchronize CPU state unconditionally in gdb_set_cpu_pc
softfloat: make USE_SOFTFLOAT_STRUCT_TYPES compile
target-xtensa: add tests for LOOPNEZ and LOOPGTZ
target-xtensa: fix LOOPNEZ/LOOPGTZ translation
qtest: add m48t59 tests for Sparc
...
Stefan Hajnoczi [Wed, 11 Apr 2012 15:27:10 +0000 (16:27 +0100)]
qmp: make block job command naming consistent
The block streaming and job commands used '_' instead of '-' for reasons
of compatibility with libvirt, which already included support for the
'_' naming. However, the semantics of block_job_cancel have changed and
libvirt now needs to handle the new semantics.
Since the old semantics were never in a QEMU release we can still rename
the commands to use '-' instead of '_'. Libvirt is also happy because
the new name can be used to distinguish QEMU binaries that support the
latest block-job-cancel semantics from those that include a downstream
block_job_cancel command.
Therefore, let's apply the QAPI/QMP naming rules to the block streaming
and job commands. QEMU 1.1 will be the first release with these
commands so no upstream users can break.
Note that HMP commands are left with '_' because that is the convention
there.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Anthony Liguori [Mon, 23 Apr 2012 14:58:33 +0000 (09:58 -0500)]
Merge remote-tracking branch 'stefanha/trivial-patches' into staging
* stefanha/trivial-patches:
Add .gitignore for tests/
e1000: Fix spelling (segmentaion -> segmentation) in debug output
spice-qemu-char.c: Show what name is unsupported
pflash_cfi01: remove redundant line
qxl: Add missing GCC_FMT_ATTR and fix format specifier
fix block_job_set_speed name in documentation
error.c: don't return value for void function
Anthony Liguori [Mon, 23 Apr 2012 14:58:01 +0000 (09:58 -0500)]
Merge remote-tracking branch 'bonzini/nbd-next' into staging
* bonzini/nbd-next:
nbd: obey FUA on reads
nbd: do not include block_int.h
nbd: do not block in nbd_wr_sync if no data at all is available
nbd: consistently return negative errno values
nbd: consistently check for <0 or >=0
nbd: consistently use ssize_t
nbd: avoid out of bounds access to recv_coroutine array
Anthony Liguori [Mon, 23 Apr 2012 14:57:47 +0000 (09:57 -0500)]
Merge remote-tracking branch 'bonzini/scsi-next' into staging
* bonzini/scsi-next:
scsi: add SANITIZE command
SCSI emulation: should tell the guest that we actually support thin provisioning
SCSI emulation: Support unmap via WRITE_SAME_10.
scsi: advertise DPOFUA
scsi: small refactoring of MMC mode-sense
scsi: support FUA on reads
scsi: add a started field to SCSIDiskReq
scsi: force unit access on VERIFY
scsi: add support for FUA on writes
scsi: move scsi_flush_complete around
scsi: make code more homogeneous in AIO callback functions
scsi: add missing test for cancelled request
virtio-scsi: add multiqueue capability
virtio: add virtio_queue_get_id
virtio-scsi: prepare migration format for multiqueue
scsi: fix memory leak
Anthony Liguori [Mon, 23 Apr 2012 14:57:04 +0000 (09:57 -0500)]
Merge remote-tracking branch 'stefanha/tracing' into staging
* stefanha/tracing:
tracetool: handle DTrace keywords 'in', 'next', 'self'
tracetool: Add MAINTAINERS info
tracetool: Add support for the 'dtrace' backend
tracetool: Add support for the 'ust' backend
tracetool: Add support for the 'simple' backend
tracetool: Add support for the 'stderr' backend
tracetool: Add module for the 'h' format
tracetool: Add module for the 'c' format
tracetool: Rewrite infrastructure as python modules
Peter Maydell [Fri, 20 Apr 2012 17:58:36 +0000 (17:58 +0000)]
target-arm: Move reset handling to arm_cpu_reset
Now that cpu_reset_model_id() has gone we can move the
reset code over to the class reset function and have cpu_state_reset
simply do a reset on the CPU QOM object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:35 +0000 (17:58 +0000)]
target-arm: Move cache ID register setup to cpu specific init fns
Move cache ID register reset out of cpu_reset_model_id() by
creating a field for the reset value in ARMCPU and setting it
up in the cpu specific init functions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:35 +0000 (17:58 +0000)]
target-arm: Move OMAP cp15_i_{max,min} reset to cpu_state_reset
Move the OMAP-specific cp15_i_{max,min} reset to cpu_state_reset;
since these registers are only accessible on CPUs with the
OMAPCP feature set there's no need to guard this reset with
either a CPUID or feature bit check.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:34 +0000 (17:58 +0000)]
target-arm: Move iWMMXT wCID reset to cpu_state_reset
Move the iWMMXT wCID reset to cpu_state_reset(). Since
we use the same value for all CPUs with this feature
(with the major/minor revision fields set to the QEMU
specific 'Q' value) there's no need to create an ARMCPU
field just for this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:33 +0000 (17:58 +0000)]
target-arm: Drop JTAG_ID documentation
None of the machines in QEMU offer a JTAG debug interface, so this info
was unused. Further, the PXA250 ID contradicts the February 2002
Developer's Manual, which has it as 0xn9264013 with n the MIDR Revision.
Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Fri, 20 Apr 2012 17:58:33 +0000 (17:58 +0000)]
target-arm: Move SCTLR reset value setup to per cpu init fns
Move the reset value of SCTLR to ARMCPU, initialised in
the per-cpu init functions. It can then be reset by a
simple copy, and we can drop the code from cpu_reset_model_id().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:32 +0000 (17:58 +0000)]
target-arm: Move MVFR* setup to per cpu init fns
Move the MVFR* VFP feature register values to ARMCPU,
so they are set up by the implementation-specific instance
init functions rather than in cpu_reset_model_id().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:32 +0000 (17:58 +0000)]
target-arm: Move FPSID config to cpu init fns
Move the reset FPSID to the ARMCPU struct, and set it in the
per-implementation instance init function. At reset we then
just copy the reset value into the CPUARMState field.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de>
Peter Maydell [Fri, 20 Apr 2012 17:58:31 +0000 (17:58 +0000)]
target-arm: Move feature bit settings to CPU init fns
Move the setting of the feature bits from cpu_reset_model_id()
to each CPU's instance init function. This requires us to move
the features field in CPUARMState so that it is not cleared
on reset.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de>
Blue Swirl [Sat, 21 Apr 2012 13:33:55 +0000 (13:33 +0000)]
Merge branch 'arm-devs.for-upstream' of git://git.linaro.org/people/pmaydell/qemu-arm
* 'arm-devs.for-upstream' of git://git.linaro.org/people/pmaydell/qemu-arm:
versatiblepb: add NOR flash support
hw/arm_mptimer: Reset the qemu_timer at reset
versatilepb: add ds1338 rtc device
realview: break out versatile i2c controller code
Peter Maydell [Mon, 12 Mar 2012 06:24:45 +0000 (06:24 +0000)]
gdbstub: Synchronize CPU state unconditionally in gdb_set_cpu_pc
Synchronize the CPU state via cpu_sychronize_state() unconditionally
in gdb_set_cpu_pc() rather than only in some of the target ifdef
ladder cases.
We can divide the CPUs into three categories:
* non-KVM targets: no change of behaviour since we will use the
kvm-stub.c no-op function.
* i386 and s390: no change of behaviour since they were already
calling this function
* PPC (in KVM mode): this fixes an error: failing to synchronise
was accidental and probably a bug.
This also paves the way for other targets (specifically ARM) which
can add KVM support in future without having to add another target
specific change to this bit of code.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Juan Quintela [Tue, 20 Mar 2012 05:24:25 +0000 (05:24 +0000)]
softfloat: make USE_SOFTFLOAT_STRUCT_TYPES compile
This change makes it compile and return the same value than the #undef one.
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Max Filippov [Sun, 15 Apr 2012 21:47:06 +0000 (01:47 +0400)]
target-xtensa: fix LOOPNEZ/LOOPGTZ translation
Translation of LOOP instructions used to call LEND SR write handler to
update LEND and invalidate relevant TBs. Now that LEND SR write handler
ends TB, LOOPNEZ and LOOPGTZ generate wrong code (same as for simple
LOOP). Fix it by calling wsr_lend helper directly.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Eric Benard [Mon, 16 Apr 2012 05:02:47 +0000 (05:02 +0000)]
versatiblepb: add NOR flash support
- add support for the 64MB NOR CFI01 flash available at
0x34000000 on the versatilepb board
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0225d/BBAJIHEC.html
- tested with barebox bootloader
Signed-off-by: Eric Bénard <eric@eukrea.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Oskar Andero [Fri, 20 Apr 2012 15:38:52 +0000 (15:38 +0000)]
realview: break out versatile i2c controller code
The versatile i2c controller implementation was separated to
its own file called versatile_i2c.c. This is done as a preparation
for adding i2c support to the versatilepb board.
Signed-off-by: Oskar Andero <oskar.andero@gmail.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Kevin Wolf [Thu, 12 Apr 2012 15:21:44 +0000 (17:21 +0200)]
qemu-iotests: Fix test 031 for qcow2 v3 support
qcow2.py must be updated to work with version 3 images at all, the
output has changed since the feature table extension has been added, and
version 2 and version 3 images can't possibly have the same test output.
Change the test case to completely ignore IMGOPTS and run the test for
both compat=1.1 and compat=0.10 regardless of the ./check command line.
Kevin Wolf [Tue, 27 Mar 2012 11:45:14 +0000 (13:45 +0200)]
qemu-iotests: Add -o and make v3 the default for qcow2
This adds an -o option to qemu-iotests, which is an option string that
is passed through to qemu-img create -o... This allows testing different
subformat with a command like './check -qcow2 -o compat=0.10'.
For qcow2, if no compat option is specified, compat=1.1 is the new
default.
Kevin Wolf [Thu, 15 Dec 2011 11:20:58 +0000 (12:20 +0100)]
qcow2: Version 3 images
This adds the basic infrastructure to qcow2 to handle version 3 images.
It includes code to create v3 images, allow header updates for v3 images
and checks feature bits.
It still misses support for zero clusters, so this is not a fully
compliant implementation of v3 yet.
The default for creating new images stays at v2 for now.
Kevin Wolf [Tue, 27 Mar 2012 11:17:22 +0000 (13:17 +0200)]
qcow2: Simplify count_cow_clusters
count_cow_clusters() tries to reuse existing functions, and all it
achieves is to make things much more complicated than they really are:
Everything needs COW, unless it's a normal cluster with refcount 1.
This patch implements the obvious way of doing this, and by using
qcow2_get_cluster_type() it gets rid of all flag magic.
Kevin Wolf [Tue, 27 Mar 2012 11:09:22 +0000 (13:09 +0200)]
qcow2: Refactor qcow2_free_any_clusters
Zero clusters will add another cluster type. Refactor the open-coded
cluster type detection into a switch of QCOW2_CLUSTER_* options so that
the detection is in a single place. This makes it easier to add new
cluster types.
Kevin Wolf [Thu, 23 Feb 2012 14:40:55 +0000 (15:40 +0100)]
qcow2: Ignore reserved bits in L1/L2 entries
This changes the still existing places that assume that the only flags
are QCOW_OFLAG_COPIED and QCOW_OFLAG_COMPRESSED to properly mask out
reserved bits.
Kevin Wolf [Thu, 15 Mar 2012 16:20:11 +0000 (17:20 +0100)]
qcow2: Fail write_compressed when overwriting data
qcow2_alloc_compressed_cluster_offset() already fails if the copied flag
is set, because qcow2_write_compressed() doesn't perform COW as it would
have to do to allow this.
However, what we really want to check here is whether the cluster is
allocated or not. With internal snapshots the copied flag may not be set
on allocated clusters. Check the cluster offset instead.
Kevin Wolf [Thu, 15 Mar 2012 15:37:40 +0000 (16:37 +0100)]
qcow2: Ignore reserved bits in count_contiguous_clusters()
Until now, count_contiguous_clusters() has an argument that allowed to
specify flags that should be ignored in the comparison, i.e. that are
allowed to change between contiguous clusters.
This patch changes the function so that it ignores all flags by default
now and you need to pass the flags on which it should stop.
Kevin Wolf [Wed, 14 Mar 2012 18:15:03 +0000 (19:15 +0100)]
qcow2: Ignore reserved bits in get_cluster_offset
With this change, reading from a qcow2 image ignores all reserved bits
that are set in an L1 or L2 table entry.
Now get_cluster_offset() assigns *cluster_offset only the offset without
any other flags. The cluster type is not longer encoded in the offset,
but a positive return value in case of success.
Kevin Wolf [Wed, 11 Apr 2012 14:33:50 +0000 (16:33 +0200)]
qcow2: Save disk size in snapshot header
This allows that different snapshots of an image can have different
sizes, which is a requirement for enabling image resizing even with
images that have internal snapshots.
We don't do the actual support for it now, but make sure that the
additional field is present and not completely ignored in all version 3
images. When trying to load a snapshot of different size, it returns
an error.
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