Skip to content

Q
qemu

openeuler / qemu

通知 10
Star 0
Fork 0
Q
qemu
切换分支/标签
  1. 27 2月, 2012 1 次提交
  3. 22 2月, 2012 1 次提交
  5. 09 2月, 2012 2 次提交
    • S
      qed: replace is_write with flags field · 6e4f59bd
      由 Stefan Hajnoczi 提交于 
      Per-request attributes like read/write are currently implemented as bool
fields in the QEDAIOCB struct.  This becomes unwiedly as the number of
attributes grows.  For example, the qed_aio_setup() function would have
to take multiple bool arguments and at call sites it would be hard to
distinguish the meaning of each bool.

Instead use a flags field with bitmask constants.  This will be used
when zero write support is added.
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      6e4f59bd
    • S
      block: add .bdrv_co_write_zeroes() interface · f08f2dda
      由 Stefan Hajnoczi 提交于 
      The ability to zero regions of an image file is a useful primitive for
higher-level features such as image streaming or zero write detection.

Image formats may support an optimized metadata representation instead
of writing zeroes into the image file.  This allows zero writes to be
potentially faster than regular write operations and also preserve
sparseness of the image file.

The .bdrv_co_write_zeroes() interface should be implemented by block
drivers that wish to provide efficient zeroing.

Note that this operation is different from the discard operation, which
may leave the contents of the region indeterminate.  That means
discarded blocks are not guaranteed to contain zeroes and may contain
junk data instead.
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      f08f2dda
  7. 31 1月, 2012 1 次提交
  9. 26 1月, 2012 5 次提交
  11. 19 1月, 2012 1 次提交
  13. 13 1月, 2012 1 次提交
  15. 04 1月, 2012 1 次提交
  17. 21 12月, 2011 1 次提交
  19. 15 12月, 2011 1 次提交
    • P
      block: bdrv_aio_* do not return NULL · ad54ae80
      由 Paolo Bonzini 提交于 
      Initially done with the following semantic patch:

@ rule1 @
expression E;
statement S;
@@
  E =
(
   bdrv_aio_readv
|  bdrv_aio_writev
|  bdrv_aio_flush
|  bdrv_aio_discard
|  bdrv_aio_ioctl
)
     (...);
(
- if (E == NULL) { ... }
|
- if (E)
    { <... S ...> }
)

which however missed the occurrence in block/blkverify.c
(as it should have done), and left behind some unused
variables.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      ad54ae80
  21. 05 12月, 2011 2 次提交
  23. 30 10月, 2011 1 次提交
  25. 29 10月, 2011 2 次提交
    • P
      scsi: do not call transfer_data after canceling a request · e88c591d
      由 Paolo Bonzini 提交于 
      Otherwise, if cancellation is "faked" by the AIO layer and goes
through qemu_aio_flush, the whole request is completed synchronously
during scsi_req_cancel.

Using the enqueued flag would work here, but not in the next patches,
so I'm introducing a new io_canceled flag.  That's because scsi_req_data
is a synchronous callback and the enqueued flag might be reset by the
time it returns.  scsi-disk cannot unref the request until after calling
scsi_req_data.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      e88c591d
    • R
      iSCSI block driver · c589b249
      由 Ronnie Sahlberg 提交于 
      This provides built-in support for iSCSI to QEMU.

This has the advantage that the iSCSI devices need not be made visible to the host, which is useful if you have very many virtual machines and very many iscsi devices.
It also has the benefit that non-root users of QEMU can access iSCSI devices across the network without requiring root privilege on the host.

This driver interfaces with the multiplatform posix library for iscsi initiator/client access to iscsi devices hosted at
    git://github.com/sahlberg/libiscsi.git

The patch adds the driver to interface with the iscsi library.
It also updated the configure script to
* by default, probe is libiscsi is available and if so, build
  qemu against libiscsi.
* --enable-libiscsi
  Force a build against libiscsi. If libiscsi is not available
  the build will fail.
* --disable-libiscsi
  Do not link against libiscsi, even if it is available.

When linked with libiscsi, qemu gains support to access iscsi resources such as disks and cdrom directly, without having to make the devices visible to the host.

You can specify devices using a iscsi url of the form :
iscsi://[<username>[:<password>@]]<host>[:<port]/<target-iqn-name>/<lun>
When using authentication, the password can optionally be set with
LIBISCSI_CHAP_PASSWORD="password" to avoid it showing up in the process list
Signed-off-by: NRonnie Sahlberg <ronniesahlberg@gmail.com>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      c589b249
  27. 27 10月, 2011 3 次提交
  29. 21 10月, 2011 2 次提交
    • P
      block: add bdrv_co_discard and bdrv_aio_discard support · 4265d620
      由 Paolo Bonzini 提交于 
      This similarly adds support for coroutine and asynchronous discard.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      4265d620
    • S
      hw/9pfs: Fix broken compilation caused by wrong trace events · c76eaf13
      由 Stefan Weil 提交于 
      Commit c572f23a added trace events
with mismatching format string and arguments.

gcc reports these errors:

In file included from trace.c:2:0:
trace.h: In function ‘trace_v9fs_attach’:
trace.h:2850:9: error: too many arguments for format [-Werror=format-extra-args]
trace.h: In function ‘trace_v9fs_wstat’:
trace.h:3039:9: error: too many arguments for format [-Werror=format-extra-args]
trace.h: In function ‘trace_v9fs_mkdir’:
trace.h:3088:9: error: too many arguments for format [-Werror=format-extra-args]
trace.h: In function ‘trace_v9fs_mkdir_return’:
trace.h:3095:9: error: too many arguments for format [-Werror=format-extra-args]

Fix the format strings and also use %u instead of %d for unsigned values
in the changed strings. There are more minor errors of this kind
which I did not fix because that would make the review more difficult.

v2: Fixed position of } for v9fs_mkdir_return.

Cc: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
      c76eaf13
  31. 16 10月, 2011 1 次提交
  33. 15 10月, 2011 1 次提交
  35. 03 10月, 2011 4 次提交
  37. 01 10月, 2011 1 次提交
  39. 21 9月, 2011 1 次提交
  41. 17 9月, 2011 3 次提交
  43. 12 9月, 2011 1 次提交
  45. 11 9月, 2011 1 次提交
  47. 07 9月, 2011 2 次提交
    • G
      usb: claim port at device initialization time. · 891fb2cd
      由 Gerd Hoffmann 提交于 
      This patch makes qemu assign a port when creating the device, not when
attaching it.  For most usb devices this isn't a noticable difference
because they are in attached state all the time.

The change affects usb-host devices which live in detached state while
the real device is unplugged from the host.  They have a fixed port
assigned all the time now instead of getting grabbing one on attach and
releasing it at detach, i.e. they stop floating around at the usb bus.

The change also allows to simplify usb-hub.  It doesn't need the
handle_attach() callback any more to configure the downstream ports.
This can be done at device initialitation time now.  The changed
initialization order (first grab upstream port, then register downstream
ports) also fixes some icky corner cases.  For example it is not possible
any more to plug the hub into one of its own downstream ports.

The usb host adapters must care too.  USBPort->dev being non-NULL
doesn't imply any more the device is in attached state.  The host
adapters must additionally check the USBPort->dev->attached flag.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
      891fb2cd
    • G
      usb-ehci: handle siTDs · 2fe80192
      由 Gerd Hoffmann 提交于 
      This patch adds code to do minimal siTD handling, which is basically
just following the next pointer.  This is good enougth to handle the
inactive siTDs used by FreeBSD.  Active siTDs are skipped too as we
don't have split transfer support in qemu, additionally a warning is
printed.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
      2fe80192