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  1. 05 Mar, 2018 1 commit
  3. 19 Feb, 2018 2 commits
  5. 16 Feb, 2018 1 commit
  7. 31 Jan, 2018 1 commit
  9. 24 Jan, 2018 1 commit
  11. 18 Jan, 2018 1 commit
  13. 09 Jan, 2018 1 commit
  15. 25 Oct, 2017 1 commit
  17. 10 Oct, 2017 1 commit
  19. 21 Sep, 2017 1 commit
    • Paolo Bonzini's avatar
      scsi, file-posix: add support for persistent reservation management · 7c9e5276
      Paolo Bonzini authored 
      It is a common requirement for virtual machine to send persistent
reservations, but this currently requires either running QEMU with
CAP_SYS_RAWIO, or using out-of-tree patches that let an unprivileged
QEMU bypass Linux's filter on SG_IO commands.

As an alternative mechanism, the next patches will introduce a
privileged helper to run persistent reservation commands without
expanding QEMU's attack surface unnecessarily.

The helper is invoked through a "pr-manager" QOM object, to which
file-posix.c passes SG_IO requests for PERSISTENT RESERVE OUT and
PERSISTENT RESERVE IN commands.  For example:

  $ qemu-system-x86_64
      -device virtio-scsi \
      -object pr-manager-helper,id=helper0,path=/var/run/qemu-pr-helper.sock
      -drive if=none,id=hd,driver=raw,file.filename=/dev/sdb,file.pr-manager=helper0
      -device scsi-block,drive=hd

or:

  $ qemu-system-x86_64
      -device virtio-scsi \
      -object pr-manager-helper,id=helper0,path=/var/run/qemu-pr-helper.sock
      -blockdev node-name=hd,driver=raw,file.driver=host_device,file.filename=/dev/sdb,file.pr-manager=helper0
      -device scsi-block,drive=hd

Multiple pr-manager implementations are conceivable and possible, though
only one is implemented right now.  For example, a pr-manager could:

- talk directly to the multipath daemon from a privileged QEMU
  (i.e. QEMU links to libmpathpersist); this makes reservation work
  properly with multipath, but still requires CAP_SYS_RAWIO

- use the Linux IOC_PR_* ioctls (they require CAP_SYS_ADMIN though)

- more interestingly, implement reservations directly in QEMU
  through file system locks or a shared database (e.g. sqlite)
Signed-off-by: 's avatarPaolo Bonzini <pbonzini@redhat.com>
      7c9e5276
  21. 19 Sep, 2017 1 commit
  23. 18 Sep, 2017 1 commit
  25. 15 Sep, 2017 1 commit
  27. 20 Jul, 2017 1 commit
  29. 11 Jul, 2017 1 commit
  31. 10 Jul, 2017 1 commit
    • Vladimir Sementsov-Ogievskiy's avatar
      nbd: use generic trace subsystem instead of TRACE macro · 9588463e
      Vladimir Sementsov-Ogievskiy authored 
      Let NBD use the trace mechanisms already present in qemu. Now you can
use the -trace optino of qemu, or the -T/--trace option of qemu-img,
qemu-io, and qemu-nbd, to select nbd traces. For qemu, the QMP commands
trace-event-{get,set}-state can also toggle tracing on the fly.

Example:
   qemu-nbd --trace 'nbd_*' <image file> # enables all nbd traces

Recompilation with CFLAGS=-DDEBUG_NBD is no more needed, furthermore,
DEBUG_NBD macro is removed from the code.
Signed-off-by: 's avatarVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170707152918.23086-11-vsementsov@virtuozzo.com>
[eblake: minor tweaks to a couple of traces]
Signed-off-by: 's avatarEric Blake <eblake@redhat.com>
      9588463e
  33. 04 Jul, 2017 1 commit
  35. 15 Jun, 2017 4 commits
  37. 02 Jun, 2017 1 commit
  39. 17 May, 2017 1 commit
  41. 20 Mar, 2017 1 commit
  43. 21 Feb, 2017 1 commit
  45. 20 Feb, 2017 1 commit
  47. 31 Jan, 2017 6 commits
  49. 22 Dec, 2016 1 commit
  51. 20 Dec, 2016 1 commit
    • Thomas Huth's avatar
      Move target-* CPU file into a target/ folder · fcf5ef2a
      Thomas Huth authored 
      We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.

Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part]
Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part]
Acked-by: Michael Walle <michael@walle.cc> [lm32 part]
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part]
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part]
Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part]
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part]
Acked-by: Richard Henderson <rth@twiddle.net> [alpha part]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part]
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [cris&microblaze part]
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part]
Signed-off-by: 's avatarThomas Huth <thuth@redhat.com>
      fcf5ef2a
  53. 15 Dec, 2016 1 commit
    • Marc-André Lureau's avatar
      contrib: add libvhost-user · 7b2e5c65
      Marc-André Lureau authored 
      Add a library to help implementing vhost-user backend (or slave).

Dealing with vhost-user as an application developer isn't so easy: you
have all the trouble with any protocol: validation, unix ancillary data,
shared memory, eventfd, logging, and on top of that you need to deal
with virtio queues, if possible efficiently.

qemu test has a nice vhost-user testing application vhost-user-bridge,
which implements most of vhost-user, and virtio.c which implements
virtqueues manipulation. Based on these two, I tried to make a simple
library, reusable for tests or development of new vhost-user scenarios.
Signed-off-by: 's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
[Felipe: set used_idx copy on SET_VRING_ADDR and update shadow avail idx
 on SET_VRING_BASE]
Signed-off-by: 's avatarFelipe Franciosi <felipe@nutanix.com>
Reviewed-by: 's avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: 's avatarMichael S. Tsirkin <mst@redhat.com>
      7b2e5c65
  55. 26 Oct, 2016 1 commit
  57. 25 Oct, 2016 1 commit
  59. 17 Oct, 2016 1 commit
  61. 28 Sep, 2016 1 commit