Otherwise, live migration of the top layer will miss zero clusters and
let the backing file show through.  This also matches what is done in qed.

QCOW2_CLUSTER_ZERO clusters are invalid in v2 image files.  Check this
directly in qcow2_get_cluster_offset instead of replicating the test
everywhere.

Cc: qemu-stable@nongnu.org
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

We already flush when the function completes.  There is no need to flush
after every compressed cluster.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

The update_cluster_refcount() function increments/decrements a cluster's
refcount and then returns the new refcount value.

There is no need to flush since both update_cluster_refcount() callers
already take care of this:

1. qcow2_alloc_bytes() calls update_cluster_refcount() when compressed
   sectors will be appended to an existing cluster with enough free
   space.  qcow2_alloc_bytes() already flushes so there is no need to do
   so in update_cluster_refcount().

2. qcow2_update_snapshot_refcount() sets a cache dependency on refcounts
   if it needs to update L2 entries.  It also flushes before completing.

Removing this flush significantly speeds up qcow2 snapshot creation:

  $ qemu-img create -f qcow2 test.qcow2 -o size=50G,preallocation=metadata
  $ time qemu-img snapshot -c new test.qcow2

Time drops from more than 3 minutes to under 1 second.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Users of qcow2_update_snapshot_refcount() do not flush consistently.
qcow2_snapshot_create() flushes but qcow2_snapshot_goto() and
qcow2_snapshot_delete() do not.

Solve this by moving the bdrv_flush() into
qcow2_update_snapshot_refcount().
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Compressed writes use qcow2_alloc_bytes() to allocate space with byte
granularity.  The affected clusters' refcounts will be incremented but
we do not need to flush yet.

Set a L2 cache dependency on the refcount block cache, so that the
refcounts get written out before the L2 updates.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Since qcow2 metadata is cached we need to flush the caches, not just the
underlying file.  Use bdrv_flush(bs) instead of bdrv_flush(bs->file).

Also add the error return path when bdrv_flush() fails and move the
flush after checking for qcow2_alloc_clusters() failure so that the
qcow2_alloc_clusters() error return value takes precedence.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

update_refcount() affects the refcount cache, it does not write to disk.
Therefore bdrv_flush(bs->file) does nothing.  We need to flush the
refcount cache in order to write out the refcount updates!

While we're here also add error returns when qcow2_cache_flush() fails.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

qcow2 images now accept a boolean lazy_refcounts options. Use it like
this:

  -drive file=test.qcow2,lazy_refcounts=on

If the option is specified on the command line, it overrides the default
specified by the qcow2 header flags that were set when creating the
image.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Any non-default -drive options are now passed down to the block drivers.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Pointing to a QemuOpts element is surprising and can lead to subtle
use-after-free errors when the QemuOpts is freed after all options are
parsed.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

This adds a function that adds all entries of a QDict to a QemuOpts if
the keys are known, and leaves only the rest in the QDict.

This way a single QDict of -drive options can be processed in multiple
places (generic block layer, block driver, backing file block driver,
etc.), where each part picks the options it knows. If at the end of the
process the QDict isn't empty, the user specified an invalid option.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

The options are passed down to the block drivers, which are supposed to
remove all options they have processed. Anything that is left over in
the end is an unknown option and results in an error.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

It doesn't do anything yet except storing the options QDict in the
BlockDriverState.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

These functions don't exist until glib version 2.26. QEMU is currently only
mandating glib 2.12.

This patch replaces the functions with g_key_file_get/set_integer.

Unbreaks the build on Ubuntu 10.04 and RHEL 5.6.

Regression was introduced by 39097dafSigned-off-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 1363323879-682-1-git-send-email-peter.crosthwaite@xilinx.com
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

* kraxel/chardev.5:
  spice-qemu-char: Remove dead debugging code
  spice-qemu-char: Fix name parameter issues after qapi-ifying
  qemu-char.c: fix waiting for telnet connection message
  Revert "hmp: Disable chardev-add and chardev-remove"
  chardev: add udp support to qapi
  chardev: add memory (ringbuf) support to qapi
  chardev: add vc support to qapi
  chardev: add spice support to qapi
  chardev: add pipe support to qapi
  chardev: add console support to qapi
  chardev: switch pty init to qapi
  chardev: switch parallel init to qapi
  chardev: switch serial/tty init to qapi
  chardev: add stdio support to qapi
  chardev: switch file init to qapi
  chardev: add braille support to qapi
  chardev: add msmouse support to qapi
  chardev: switch null init to qapi
  chardev: add mux chardev support to qapi
  chardev: add support for qapi-based chardev initialization

Conflicts:
	ui/console.c
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

# By Andreas Färber (16) and Igor Mammedov (1)
# Via Andreas Färber
* afaerber/qom-cpu:
  target-lm32: Update VMStateDescription to LM32CPU
  target-arm: Override do_interrupt for ARMv7-M profile
  cpu: Replace do_interrupt() by CPUClass::do_interrupt method
  cpu: Pass CPUState to cpu_interrupt()
  exec: Pass CPUState to cpu_reset_interrupt()
  cpu: Move halted and interrupt_request fields to CPUState
  target-cris/helper.c: Update Coding Style
  target-i386: Update VMStateDescription to X86CPU
  cpu: Introduce cpu_class_set_vmsd()
  cpu: Register VMStateDescription through CPUState
  stubs: Add a vmstate_dummy struct for CONFIG_USER_ONLY
  vmstate: Make vmstate_register() static inline
  target-sh4: Move PVR/PRR/CVR into SuperHCPUClass
  target-sh4: Introduce SuperHCPU subclasses
  cpus: Replace open-coded CPU loop in qmp_memsave() with qemu_get_cpu()
  monitor: Use qemu_get_cpu() in monitor_set_cpu()
  cpu: Fix qemu_get_cpu() to return NULL if CPU not found

# By Laszlo Ersek (3) and others
# Via Michael Roth
* mdroth/qga-pull-3-11-2013:
  qga: implement qmp_guest_set_vcpus() for Linux with sysfs
  qga: implement qmp_guest_get_vcpus() for Linux with sysfs
  qga: introduce guest-get-vcpus / guest-set-vcpus with stubs
  qga: add guest-set-time command
  qga: add guest-get-time command
  qemu-ga: use key-value store to avoid recycling fd handles after restart
  qemu-ga: make guest-sync-delimited available during fsfreeze
  qemu-ga: fix confusing GAChannelMethod comparison
  qga: cast to int for DWORD type

# By Peter Maydell (5) and others
# Via Riku Voipio
* riku/linux-user-for-upstream:
  linux-user/syscall.c: Don't warn about unimplemented get_robust_list
  linux-user: Implement accept4
  linux-user: Implement sendfile and sendfile64
  linux-user: make bogus negative iovec lengths fail EINVAL
  linux-user: Fix layout of usage table to account for option text
  linux-user: Add more sparc syscall numbers
  linux-user: Support setgroups syscall with no groups
  linux-user: fix futex strace of FUTEX_CLOCK_REALTIME
  linux-user/syscall.c: handle FUTEX_WAIT_BITSET in do_futex
  linux-user: improve print_fcntl()
  linux-user: Add Alpha socket constants

Since commit d62e5f7036a018b2ad09f17ebd481bd28953d783
"chardev: add spice support to qapi"

It is impossible to set the debug parameter, so all the dprintf calls
are essentially nops. Since we've not needed the debug parameter in ages this
is not a problem, if it later turns out we do need some more debugging options
we can add more trace-points.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

The strings passed in through the qapi calls are dynamic memory, since
we want to have them stick around longer then just the call to
qemu_chr_open_spice_* we need to strdup them.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

    commit 01f45d98
    Author: Anthony Liguori <aliguori@us.ibm.com>
    Date:   Tue Mar 5 23:21:32 2013 +0530

       qemu-char: move text console init to console.c

Broke vc initialization for GTK.  It's a simple typo.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Current colon position in "waiting for telnet connection" message template
produces messages like:
QEMU waiting for connection on: telnet::127.0.0.16666,server

After moving a colon to the right, we will get a correct messages like:
QEMU waiting for connection on: telnet:127.0.0.1:6666,server
Signed-off-by: NIgor Mitsyanko <i.mitsyanko@gmail.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This reverts commit 8a14952c.

This patch adds 'udp' support to qapi.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'memory' support to qapi and also switches over
the memory chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'vc' support to qapi and also switches over the
vc chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'spicevmc' and 'spiceport' support to qapi and also
switches over the spice chardev initialization to the new qapi code
path.

This patch adds 'pipe' support to qapi and also switches over the
pipe chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'console' support to qapi and also switches over the
console chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch switches over the pty chardev initialization
to the new qapi code path.

Bonus: Taking QemuOpts out of the loop allows some nice
cleanups along the way.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch switches over the parallel chardev initialization
to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch switches over the serial chardev initialization
to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'stdio' support to qapi and also switches over the
stdio chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch switches over the 'file' chardev initialization
to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'braille' support to qapi and also switches over
the braille chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds 'msmouse' support to qapi and also switches over
the msmouse chardev initialization to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch switches over the 'null' chardev initialization
to the new qapi code path.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This adds mux chardev support to the qapi and also makes the qapi-based
chardev creation path handle the "mux=on" option correctly.