Commit Graph

70 Commits

Author SHA1 Message Date
Michael S. Tsirkin
bb72463bc8 virtio-scsi: clean out duplicate cdb field
cdb is now part of cmd, drop it from req.
There's also nothing to check using build assert now.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-11 18:24:30 +01:00
Michael S. Tsirkin
03325525c3 virtio-scsi: fix cdb/sense size
Commit "virtio-scsi: use standard-headers" added
cdb and sense into req/rep structures, which
breaks uses of sizeof for these structures,
since qemu adds its own arrays on top.

To fix, redefine CDB/sense field size to 0.

Reported-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-03-11 18:24:29 +01:00
Peter Maydell
0048fa6c80 pci, pc, virtio fixes and cleanups
A bunch of fixes all over the place.
 All of ACPI refactoring has been merged.
 Legacy pci commands have been dropped.
 virtio header cleanup
 initial patches from virtio-1.0 branch
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pci, pc, virtio fixes and cleanups

A bunch of fixes all over the place.
All of ACPI refactoring has been merged.
Legacy pci commands have been dropped.
virtio header cleanup
initial patches from virtio-1.0 branch

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

* remotes/mst/tags/for_upstream: (130 commits)
  acpi: drop unused code
  aml-build: comment fix
  acpi-build: fix typo in comment
  acpi: update generated files
  vhost user:support vhost user nic for non msi guests
  aml-build: fix build for glib < 2.22
  acpi: update generated files
  Makefile.target: binary depends on config-devices
  acpi-test-data: update after pci rewrite
  acpi, mem-hotplug: use PC_DIMM_SLOT_PROP in acpi_memory_plug_cb().
  pci-hotplug-old: Has been dead for five major releases, bury
  pci: Give a few helpers internal linkage
  acpi: make build_*() routines static to aml-build.c
  pc: acpi: remove not used anymore ssdt-[misc|pcihp].hex.generated blobs
  pc: acpi-build: drop template patching and create PCI bus tree dynamically
  tests: ACPI: update pc/SSDT.bridge due to new alg of PCI tree creation
  pc: acpi-build: simplify PCI bus tree generation
  tests: add ACPI blobs for qemu with bridge cases
  tests: bios-tables-test: add support for testing bridges
  tests: ACPI test blobs update due to PCI0._CRS changes
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Conflicts:
	hw/pci/pci-hotplug-old.c
2015-03-09 09:14:28 +00:00
Max Reitz
f6758f7d6b virtio-scsi: Allocate op blocker reason before blocking
s->blocker is really only used in hw/scsi/virtio-scsi.c; the only places
where it is used in hw/scsi/virtio-scsi-dataplane.c is when it is
allocated and when it is freed. That does not make a whole lot of sense
(and is actually wrong because this leads to s->blocker potentially
being NULL when blk_op_block_all() is called in virtio-scsi.c), so move
the allocation and destruction of s->blocker to the device realization
and unrealization in virtio-scsi.c, respectively.

Case in point:

$ echo -e 'eject drv\nquit' | \
    x86_64-softmmu/qemu-system-x86_64 \
        -monitor stdio -machine accel=qtest -display none \
        -object iothread,id=thr -device virtio-scsi-pci,iothread=thr \
        -drive if=none,file=test.qcow2,format=qcow2,id=drv \
        -device scsi-cd,drive=drv

Without this patch:

(qemu) eject drv
[1]    10102 done
       10103 segmentation fault (core dumped)

With this patch:

(qemu) eject drv
Device 'drv' is busy: block device is in use by data plane
(qemu) quit

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <1425057113-26940-1-git-send-email-mreitz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-02 10:57:07 +01:00
Fam Zheng
0543055967 virtio-scsi-dataplane: Call blk_set_aio_context within BQL
It's not safe to call blk_set_aio_context from outside BQL because of
the bdrv_drain_all there. Let's put it in the hotplug callback which
will be called by qdev device realization for each scsi device attached
to the bus.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1423969591-23646-3-git-send-email-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-27 14:43:45 +01:00
Cornelia Huck
ef546f1275 virtio: add feature checking helpers
Add a helper function for checking whether a bit is set in the guest
features for a vdev as well as one that works on a feature bit set.

Convert code that open-coded this: It cleans up the code and makes it
easier to extend the guest feature bits.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-02-26 13:04:07 +01:00
Michael S. Tsirkin
019adbd371 virtio-scsi: use standard-headers
Drop duplicated code.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-26 13:04:05 +01:00
Cornelia Huck
91d5c57a2e virtio: fix feature bit checks
Several places check against the feature bit number instead of against
the feature bit. Fix them.

Cc: qemu-stable@nongnu.org
Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-01-27 14:46:17 +02:00
Markus Armbruster
3c55fe2a13 scsi: Use g_new() & friends where that makes obvious sense
g_new(T, n) is neater than g_malloc(sizeof(T) * n).  It's also safer,
for two reasons.  One, it catches multiplication overflowing size_t.
Two, it returns T * rather than void *, which lets the compiler catch
more type errors.

This commit only touches allocations with size arguments of the form
sizeof(T).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15 12:21:02 +01:00
Paolo Bonzini
55783a5521 virtio-scsi: work around bug in old BIOSes
Old BIOSes left some padding by mistake after the req_size/resp_size.
New QEMU does not like it, thinking it is a bidirectional command.

As a workaround, we can check if the ANY_LAYOUT bit is set; if not, we
always consider the first buffer as the virtio-scsi request/response,
because, back when QEMU did not support ANY_LAYOUT, it expected the
payload to start at the second element of the iovec.

This can show up during migration.

Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-11-07 16:09:57 +01:00
Fam Zheng
0ba1f53191 virtio-scsi: Fix num_queue input validation
We need to count the ctrlq and eventq, and also cleanup before
returning. Besides, the format string should be unsigned.

The number could never be less than zero.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-31 11:29:02 +01:00
Fam Zheng
93bd49aff9 virtio-scsi: Fix memory leak when realize failed
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-31 11:29:02 +01:00
Bin Wu
024d9adc79 hw/scsi/virtio-scsi.c: fix the "type" use error in virtio_scsi_handle_ctrl
The local variable "type" in virtio_scsi_handle_ctl represents the tmf
command type from the guest and it has the same meaning as the
req->req.tmf.type. However, before the invoking of virtio_scsi_parse_req
the req->req.tmf.type doesn't has the correct value(just initialized to
zero). Therefore, we need to use the "type" variable to judge the case.

Cc: qemu-stable@nongnu.org
Signed-off-by: Bin Wu <wu.wubin@huawei.com>
[Actually make it compile, "type" must be uint32_t in order to pass
 it to virtio_tswap32s. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-27 16:11:45 +01:00
Ting Wang
b7890c40e5 virtio-scsi: sense in virtio_scsi_command_complete
If req->resp.cmd.status is not GOOD, the address of sense for
qemu_iovec_from_buf should be modified from &req->resp to sense.

Cc: qemu-stable@nongnu.org
Signed-off-by: Ting Wang <kathy.wangting@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-27 16:10:53 +01:00
Fam Zheng
3e2b2a9c49 virtio-scsi-dataplane: Add op blocker
We need this to protect dataplane thread from race conditions with block
jobs until the latter is made dataplane-safe.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23 16:41:22 +02:00
Markus Armbruster
4be746345f hw: Convert from BlockDriverState to BlockBackend, mostly
Device models should access their block backends only through the
block-backend.h API.  Convert them, and drop direct includes of
inappropriate headers.

Just four uses of BlockDriverState are left:

* The Xen paravirtual block device backend (xen_disk.c) opens images
  itself when set up via xenbus, bypassing blockdev.c.  I figure it
  should go through qmp_blockdev_add() instead.

* Device model "usb-storage" prompts for keys.  No other device model
  does, and this one probably shouldn't do it, either.

* ide_issue_trim_cb() uses bdrv_aio_discard() instead of
  blk_aio_discard() because it fishes its backend out of a BlockAIOCB,
  which has only the BlockDriverState.

* PC87312State has an unused BlockDriverState[] member.

The next two commits take care of the latter two.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20 14:02:25 +02:00
Igor Mammedov
02206e5275 scsi: Convert virtio-scsi HBA to hotplug handler API
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-10-15 05:03:14 +02:00
Paolo Bonzini
35e4e96c4d virtio-scsi: fix use-after-free of VirtIOSCSIReq
scsi_req_continue can complete the request and cause the VirtIOSCSIReq
to be freed.  Fetch req->sreq just once to avoid the bug.

Reported-by: Richard Jones <rjones@redhat.com>
Tested-by: Richard Jones <rjones@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-09 15:36:15 +02:00
Fam Zheng
49e7e31aa0 virtio-scsi: Handle TMF request cancellation asynchronously
For VIRTIO_SCSI_T_TMF_ABORT_TASK and VIRTIO_SCSI_T_TMF_ABORT_TASK_SET,
use scsi_req_cancel_async to start the cancellation.

Because each tmf command may cancel multiple requests, we need to use a
counter to track the number of remaining requests we still need to wait
for.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 13:30:51 +02:00
Fam Zheng
9786b592a9 virtio-scsi: Process ".iothread" property
We are ready, now let's effectively enable dataplane.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
5170f40b10 virtio-scsi: Call bdrv_io_plug/bdrv_io_unplug in cmd request handling
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
1880ad4f4e virtio-scsi: Batched prepare for cmd reqs
Queue the popped requests while calling
virtio_scsi_handle_cmd_req_prepare(), then submit them after all
prepared.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
359eea71d9 virtio-scsi: Two stages processing of cmd request
Mechanical change, in preparation for bdrv_io_plug/bdrv_io_unplug.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
dfb37cf7fa virtio-scsi: Add migration state notifier for dataplane code
Similar to virtio-blk-dataplane, we stop the iothread while migration
starts and restart it when migration finishes.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
63c7e54268 virtio-scsi: Hook up with dataplane
This enables the virtio-scsi-dataplane code by setting the iothread
in virtio-scsi device, and makes any function that is called by
back from dataplane to cooperate with the caller: they need to be
vring/iothread aware when handling the requests and using scsi devices
on the bus.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
19d339f11d virtio-scsi: Add 'iothread' property to virtio-scsi
Similar to this property in virtio-blk for dataplane, add it as a QOM
link in virtio-scsi and an alias in virtio-scsi-pci and virtio-scsi-ccw,
in order to assign an iothread to the device.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-30 11:11:20 +02:00
Fam Zheng
20e6dca1df virtio-scsi: Make virtio_scsi_push_event public
Later this will be called by dataplane code.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:41:11 +02:00
Fam Zheng
aa8e8f83d0 virtio-scsi: Make virtio_scsi_free_req public
To share with dataplane code later.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:41:11 +02:00
Fam Zheng
c505333dab virtio-scsi: Make virtio_scsi_init_req public
To share with datplane code later.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:41:11 +02:00
Fam Zheng
dc56b7c4fb virtio-scsi: Split virtio_scsi_handle_ctrl_req from virtio_scsi_handle_ctrl
To share with dataplane code.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:41:11 +02:00
Fam Zheng
bf359a445e virtio-scsi: Split virtio_scsi_handle_cmd_req from virtio_scsi_handle_cmd
This is the "common part" to handle one cmd request. Refactor out for
later usage of dataplane iothread code.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:41:11 +02:00
Paolo Bonzini
9df7bfddcc virtio-scsi: clean up virtio_scsi_parse_cdb
The command direction according to the guest-passed buffers
is already stored in the VirtIOSCSIReq.  We can use it instead
of computing it again from req->elem.

Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:40:51 +02:00
Fam Zheng
faf1e1fb4c virtio-scsi: Optimize virtio_scsi_init_req
The VirtQueueElement is a very big structure (>48k!), since it will be
initialzed by virtqueue_pop, we can save the expensive zeroing here.

This saves a few microseconds per request in my test:

[fio-test]      rw         bs         iodepth    jobs       bw         iops       latency
--------------------------------------------------------------------------------------------
Before          read       4k         1          1          110        28269      34
After           read       4k         1          1          131        33745      28

Whereas,

virtio-blk      read       4k         1          1          217        55673      16

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23 15:40:51 +02:00
Fam Zheng
c9f6552803 virtio-scsi: Report error if num_queues is 0 or too large
No cmd vq surprises guest (Linux panics in virtscsi_probe), too many
queues abort qemu (in the following virtio_add_queue).

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-08-26 13:20:44 +02:00
Paolo Bonzini
33cbb2c546 virtio-scsi: implement parse_cdb
Enable passthrough of vendor-specific commands.

Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-29 17:36:38 +02:00
Cédric Le Goater
424baff549 virtio-scsi: scsi events must be converted to target endianness
Virtio SCSI Events need to be byteswapped before being pushed
when host and guest have a different endianness. Not doing so
breaks hotplug of virtio scsi disks, with the following error
message being printed in the guest console:

virtio_scsi: Unsupport virtio scsi event 1000000

This issue got uncovered while testing disk hotplug with a PowerKVM
ppc64le guest. I have checked that this issue also affects a x86_64
guest run on a ppc64 host.

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
[ Ported from PowerKVM,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-01 09:40:38 +02:00
Greg Kurz
dfecbb95e3 virtio-scsi: virtio_scsi_push_event() lacks VirtIOSCSIReq parsing
Hotplug of a virtio scsi disk is currently broken: no disk appears in the
guest (verified with a fedora 20 host running a fedora 20 guest with KVM).
Bisect leeds to Paolo's patches to support any_layout, especially this
commit:

commit 36b15c79aa
Author: Paolo Bonzini <pbonzini@redhat.com>
Date:   Tue Jun 10 16:21:18 2014 +0200

    virtio-scsi: start preparing for any_layout

It modifies virtio_scsi_pop_req() so that it is up to the callers to parse
the virtio scsi request. It seems that virtio_scsi_push_event() was not
modified accordingly...

This patch adds a call to virtio_scsi_parse_req(). It also drops some
sanity checks that are already performed by virtio_scsi_parse_req().

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-01 09:40:38 +02:00
Rusty Russell
8c085dbe6d virtio-scsi: use virtio wrappers to access headers
Note that st*_raw and ld*_raw are effectively replaced by st*_p and ld*_p.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  converted new tswap locations to virtio_tswap,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-29 19:39:42 +03:00
Greg Kurz
1b5fc0dea4 virtio: introduce device specific migration calls
In order to migrate virtio subsections, they should be streamed after
the device itself. We need the device specific code to be called from
the common migration code to achieve this. This patch introduces load
and save methods for this purpose.

Suggested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-29 19:39:41 +03:00
Ming Lei
91d670fbf9 virtio-scsi: define dummy handle_output for vhost-scsi vqs
vhost userspace needn't to handle vq's notification from guest,
so define dummy handle_output callback for all vqs of vhost-scsi.

In some corner cases(such as when handling vq's reset from VM), virtio-pci
still trys to handle pending virtio-scsi events, then object check failure
inside virtio_scsi_handle_event() for vhost-scsi can be triggered.

The issue can be reproduced by 'rmmod virtio-scsi', 'system sleep' or reboot
inside VM.

Cc: qemu-stable@nongnu.org
Cc: Anthony Liguori <aliguori@amazon.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19 10:15:48 +02:00
Paolo Bonzini
3eff1f46f0 virtio-scsi: add support for the any_layout feature
Store the request and response headers by value, and let
virtio_scsi_parse_req check that there is only one of datain
and dataout.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18 08:47:11 +02:00
Paolo Bonzini
a3de269ccc virtio-scsi: introduce virtio_scsi_complete_cmd_req
This is also related to sense handling, and will be used
by anylayout.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18 08:47:11 +02:00
Paolo Bonzini
489c7901a6 virtio-scsi: prepare sense data handling for any_layout
Retrieve sense and copy it to guest memory, to prepare for when we will use
qemu_iovec_from_buf.

Swap response and request, since we'll use the tail of VirtIOSCSIReq
for the CDB.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18 08:47:11 +02:00
Paolo Bonzini
57fbae6e2c virtio-scsi: add extra argument and return type to qemu_sgl_concat
Will be used for anylayout support.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18 08:47:11 +02:00
Paolo Bonzini
b0b4ea17dc virtio-scsi: add target swap for VirtIOSCSICtrlTMFReq fields
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18 08:47:11 +02:00
Paolo Bonzini
36b15c79aa virtio-scsi: start preparing for any_layout
- Introduce virtio_scsi_init_req and virtio_scsi_free_req

- rename qemu_sgl_init_external to qemu_sgl_concat

- move virtio_scsi_parse_req from virtio_scsi_pop_req to callers
  and add header length checks to virtio_scsi_parse_req.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18 08:47:11 +02:00
Paolo Bonzini
0983979b3a hw: use ld_p/st_p instead of ld_raw/st_raw
The ld_raw and st_raw definitions are only needed in code that
must compile for both user-mode and softmmu emulation.  Device
models can use the equivalent ld_p/st_p which are simple
pointer accessors.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-05 16:04:17 +02:00
Peter Maydell
65903a8b08 Merge remote-tracking branch 'remotes/bonzini/scsi-next' into staging
* remotes/bonzini/scsi-next:
  megasas: remove buildtime strings
  block: iscsi build fix if LIBISCSI_FEATURE_IOVECTOR is not defined
  virtio-scsi: Plug memory leak on virtio_scsi_push_event() error path
  scsi: Document intentional fall through in scsi_req_length()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-05-22 15:27:46 +01:00
Markus Armbruster
91e7fcca47 virtio-scsi: Plug memory leak on virtio_scsi_push_event() error path
Spotted by Coverity.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-16 17:52:28 +02:00
Michael S. Tsirkin
3c3ce98142 virtio-scsi: fix buffer overrun on invalid state load
CVE-2013-4542

hw/scsi/scsi-bus.c invokes load_request.

 virtio_scsi_load_request does:
    qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));

this probably can make elem invalid, for example,
make in_num or out_num huge, then:

    virtio_scsi_parse_req(s, vs->cmd_vqs[n], req);

will do:

    if (req->elem.out_num > 1) {
        qemu_sgl_init_external(req, &req->elem.out_sg[1],
                               &req->elem.out_addr[1],
                               req->elem.out_num - 1);
    } else {
        qemu_sgl_init_external(req, &req->elem.in_sg[1],
                               &req->elem.in_addr[1],
                               req->elem.in_num - 1);
    }

and this will access out of array bounds.

Note: this adds security checks within assert calls since
SCSIBusInfo's load_request cannot fail.
For now simply disable builds with NDEBUG - there seems
to be little value in supporting these.

Cc: Andreas Färber <afaerber@suse.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2014-05-05 22:15:02 +02:00