Commit Graph

69035 Commits

Author SHA1 Message Date
Peter Maydell
082b4061a4 input: add vhost-user-input, virtio-input fixes.
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Merge remote-tracking branch 'remotes/kraxel/tags/input-20190513-v2-pull-request' into staging

input: add vhost-user-input, virtio-input fixes.

# gpg: Signature made Mon 13 May 2019 07:52:39 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/input-20190513-v2-pull-request:
  virtio-input: fix Kconfig dependency and Makefile
  virtio-input-host-pci: cleanup types
  util: simplify unix_listen()
  Add vhost-user-input-pci
  Add vhost-user-backend
  libvhost-user: add PROTOCOL_F_CONFIG if {set, get}_config
  libvhost-user: fix -Waddress-of-packed-member

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-13 12:46:48 +01:00
Peter Maydell
04d6556c5c Demacrofy the SoftMMU
- the demacro itself
   - refactor TLB_RECHECK and fix bug
   - move unaligned handler out
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-demacro-softmmu-100519-1' into staging

Demacrofy the SoftMMU

  - the demacro itself
  - refactor TLB_RECHECK and fix bug
  - move unaligned handler out

# gpg: Signature made Fri 10 May 2019 20:34:14 BST
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-demacro-softmmu-100519-1:
  cputlb: Do unaligned store recursion to outermost function
  cputlb: Do unaligned load recursion to outermost function
  cputlb: Drop attribute flatten
  cputlb: Move TLB_RECHECK handling into load/store_helper
  accel/tcg: demacro cputlb

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-13 10:45:15 +01:00
Gerd Hoffmann
503591cb6c virtio-input: fix Kconfig dependency and Makefile
Make VIRTIO_INPUT_HOST depend on VIRTIO_INPUT.
Use CONFIG_VIRTIO_INPUT_HOST in Makefile.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190510105137.17481-2-kraxel@redhat.com
2019-05-13 08:49:30 +02:00
Gerd Hoffmann
d923e30578 virtio-input-host-pci: cleanup types
virtio input is virtio-1.0 only, so we don't need the -transitional and
-non-transitional variants.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190510105137.17481-1-kraxel@redhat.com
2019-05-13 08:49:30 +02:00
Richard Henderson
4601f8d10d cputlb: Do unaligned store recursion to outermost function
This is less tricky than for loads, because we always fall
back to single byte stores to implement unaligned stores.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2019-05-10 20:23:21 +01:00
Richard Henderson
2dd9260678 cputlb: Do unaligned load recursion to outermost function
If we attempt to recurse from load_helper back to load_helper,
even via intermediary, we do not get all of the constants
expanded away as desired.

But if we recurse back to the original helper (or a shim that
has a consistent function signature), the operands are folded
away as desired.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2019-05-10 20:23:21 +01:00
Richard Henderson
fc1bc77791 cputlb: Drop attribute flatten
Going to approach this problem via __attribute__((always_inline))
instead, but full conversion will take several steps.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2019-05-10 20:23:21 +01:00
Richard Henderson
f1be36969d cputlb: Move TLB_RECHECK handling into load/store_helper
Having this in io_readx/io_writex meant that we forgot to
re-compute index after tlb_fill.  It also means we can use
the normal aligned memory load path.  It also fixes a bug
in that we had cached a use of index across a tlb_fill.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2019-05-10 20:23:21 +01:00
Alex Bennée
eed5664238 accel/tcg: demacro cputlb
Instead of expanding a series of macros to generate the load/store
helpers we move stuff into common functions and rely on the compiler
to eliminate the dead code for each variant.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2019-05-10 20:23:06 +01:00
Peter Maydell
c9ba36ff2f Block layer patches:
- block: Remove bdrv_read() and bdrv_write()
 - qemu-img: Allow rebase with no input base
 - blockjob: Fix coroutine thread after AioContext change
 - MAINTAINERS updates for pflash, curl and gluster
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- block: Remove bdrv_read() and bdrv_write()
- qemu-img: Allow rebase with no input base
- blockjob: Fix coroutine thread after AioContext change
- MAINTAINERS updates for pflash, curl and gluster

# gpg: Signature made Fri 10 May 2019 16:39:54 BST
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  iotests: Add test for rebase without input base
  qemu-img: Use zero writes after source backing EOF
  qemu-img: Allow rebase with no input base
  qcow2: Remove BDRVQcow2State.cluster_sectors
  block: Remove bdrv_read() and bdrv_write()
  vvfat: Replace bdrv_{read,write}() with bdrv_{pread,pwrite}()
  vdi: Replace bdrv_{read,write}() with bdrv_{pread,pwrite}()
  qcow2: Replace bdrv_write() with bdrv_pwrite()
  qemu-img: Use IEC binary prefixes for size constants
  test-block-iothread: Job coroutine thread after AioContext switch
  blockjob: Fix coroutine thread after AioContext change
  qemu-iotests: Fix cleanup for 192
  MAINTAINERS: Add an entry for the Parallel NOR Flash devices
  MAINTAINERS: Downgrade status of block sections without "M:" to "Odd Fixes"
  block: remove bs from lists before closing

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-10 18:44:59 +01:00
Max Reitz
11f6fc50e7 iotests: Add test for rebase without input base
This patch adds a test for rebasing an image that currently does not
have a backing file.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Max Reitz
1c6e877992 qemu-img: Use zero writes after source backing EOF
Past the end of the source backing file, we memset() buf_old to zero, so
it is clearly easy to use blk_pwrite_zeroes() instead of blk_pwrite()
then.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Max Reitz
35ddd9300b qemu-img: Allow rebase with no input base
Currently, without -u, you cannot add a backing file to an image when it
currently has none:

$ qemu-img rebase -b base.qcow2 foo.qcow2
qemu-img: Could not open old backing file '': The 'file' block driver
requires a file name

It is really simple to allow this, though (effectively by setting
old_backing_size to 0), so this patch does just that.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Alberto Garcia
433e8e3b22 qcow2: Remove BDRVQcow2State.cluster_sectors
The last user of this field disappeared when we replace the
sector-based bdrv_write() with the byte-based bdrv_pwrite().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Alberto Garcia
2e11d7562a block: Remove bdrv_read() and bdrv_write()
No one is using these functions anymore, all callers have switched to
the byte-based bdrv_pread() and bdrv_pwrite()

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Alberto Garcia
e5a0a6784a vvfat: Replace bdrv_{read,write}() with bdrv_{pread,pwrite}()
There's only a couple of bdrv_read() and bdrv_write() calls left in
the vvfat code, and they can be trivially replaced with the byte-based
bdrv_pread() and bdrv_pwrite().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Alberto Garcia
d4f189713f vdi: Replace bdrv_{read,write}() with bdrv_{pread,pwrite}()
There's only a couple of bdrv_read() and bdrv_write() calls left in
the vdi code, and they can be trivially replaced with the byte-based
bdrv_pread() and bdrv_pwrite().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Alberto Garcia
e3b4257d03 qcow2: Replace bdrv_write() with bdrv_pwrite()
There's only one bdrv_write() call left in the qcow2 code, and it can
be trivially replaced with the byte-based bdrv_pwrite().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Stefano Garzarella
97ede57a2b qemu-img: Use IEC binary prefixes for size constants
Using IEC binary prefixes in order to make the code more readable.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Kevin Wolf
93c60f3862 test-block-iothread: Job coroutine thread after AioContext switch
This tests that a job coroutine always runs in the right iothread after
the AioContext of its main node has changed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Kevin Wolf
13726123ba blockjob: Fix coroutine thread after AioContext change
Commit 463e0be10 ('blockjob: add AioContext attached callback') tried to
make block jobs robust against AioContext changes of their main node,
but it never made sure that the job coroutine actually runs in the new
thread.

Instead of waking up the job coroutine in whatever thread it ran before,
let's always pass the AioContext where it should be running now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Kevin Wolf
4d231a384c qemu-iotests: Fix cleanup for 192
Test case 192 calls _launch_qemu, so it also needs to _cleanup_qemu when
it's done, otherwise the QMP FIFOs stay around in scratch/. It also
creates a temporary NBD socket that needs to be removed as well at the
end of the test case.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
2019-05-10 16:45:40 +02:00
Philippe Mathieu-Daudé
e0c9d0c128 MAINTAINERS: Add an entry for the Parallel NOR Flash devices
Step in to maintain it, since I have some familiarity with
the technology.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Thomas Huth
5c6090fa5b MAINTAINERS: Downgrade status of block sections without "M:" to "Odd Fixes"
Fixes might still get picked up via the qemu-block mailing list,
so the status is not "Orphan" yet.
Also add the gluster mailing list as suggested by Niels here:

 https://patchwork.kernel.org/patch/10613297/#22409943

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Anton Kuchin
30c321f97f block: remove bs from lists before closing
Close involves flush that can be performed asynchronously and bs
must be protected from being referenced before it is deleted.

Signed-off-by: Anton Kuchin <antonkuchin@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-10 16:45:40 +02:00
Peter Maydell
efb4f3b62c Pull request
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Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Pull request

# gpg: Signature made Fri 10 May 2019 14:02:22 BST
# gpg:                using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/block-pull-request:
  docs: add Security chapter to the documentation
  docs: add Secure Coding Practices to developer docs
  aio-posix: ensure poll mode is left when aio_notify is called
  block/io.c: fix for the allocation failure
  block: Add coroutine_fn to bdrv_check_co_entry
  util/readline: Add braces to fix checkpatch errors
  util: readline: replace tab indent by four spaces to fix checkpatch errors
  util/readline: add a space to fix errors by checkpatch tool

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-10 14:49:36 +01:00
Marc-André Lureau
caf88d74a7 util: simplify unix_listen()
The only caller of unix_listen() left is qga/channel-posix.c.

There is no need to deal with legacy coma-trailing options ",...".

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20190503130034.24916-6-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-05-10 14:54:11 +02:00
Marc-André Lureau
9c4d05b741 Add vhost-user-input-pci
Add a new virtio-input device, which connects to a vhost-user
backend.

Instead of reading configuration directly from an input device /
evdev (like virtio-input-host), it reads it over vhost-user protocol
with {SET,GET}_CONFIG messages. The vhost-user-backend handles the
queues & events setup.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190503130034.24916-5-marcandre.lureau@redhat.com

[ kraxel: drop -{non-,}transitional variants ]
[ kraxel: fix "make check" on !linux ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-05-10 14:52:47 +02:00
Peter Maydell
5f022626c8 GPROF fixes, GCC9 fixes, SIOCGIFNAME fix, new IPV6 sockopts, elf fix
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Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-4.1-pull-request' into staging

GPROF fixes, GCC9 fixes, SIOCGIFNAME fix, new IPV6 sockopts, elf fix

# gpg: Signature made Fri 10 May 2019 11:45:23 BST
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-4.1-pull-request:
  linux-user: fix GPROF build failure
  linux-user: avoid treading on gprof's SIGPROF signals
  linux-user: elf: Map empty PT_LOAD segments
  The ioctl(SIOCGIFNAME) call requires a struct ifreq.
  linux-user: avoid string truncation warnings in uname field copying
  linux-user/elfload: Fix GCC 9 build warnings
  linux-user: Add missing IPV6 sockopts

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-10 12:49:13 +01:00
Marc-André Lureau
f24bb7287d Add vhost-user-backend
Create a vhost-user-backend object that holds a connection to a
vhost-user backend (or "slave" process) and can be referenced from
virtio devices that support it. See later patches for input & gpu
usage.

Note: a previous iteration of this object made it user-creatable, and
allowed managed sub-process spawning, but that has been dropped for
now.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190503130034.24916-4-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-05-10 12:48:35 +02:00
Marc-André Lureau
78067fdef6 libvhost-user: add PROTOCOL_F_CONFIG if {set, get}_config
Add the config protocol feature bit if the set_config & get_config
callbacks are implemented.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190503130034.24916-3-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-05-10 12:48:35 +02:00
Marc-André Lureau
d288eef3a0 libvhost-user: fix -Waddress-of-packed-member
/home/elmarco/src/qemu/contrib/libvhost-user/libvhost-user.c: In function ‘vu_set_mem_table_exec_postcopy’:
/home/elmarco/src/qemu/contrib/libvhost-user/libvhost-user.c:546:31: warning: taking address of packed member of ‘struct VhostUserMsg’ may result in an unaligned pointer value [-Waddress-of-packed-member]
  546 |     VhostUserMemory *memory = &vmsg->payload.memory;
      |                               ^~~~~~~~~~~~~~~~~~~~~
/home/elmarco/src/qemu/contrib/libvhost-user/libvhost-user.c: In function ‘vu_set_mem_table_exec’:
/home/elmarco/src/qemu/contrib/libvhost-user/libvhost-user.c:688:31: warning: taking address of packed member of ‘struct VhostUserMsg’ may result in an unaligned pointer value [-Waddress-of-packed-member]
  688 |     VhostUserMemory *memory = &vmsg->payload.memory;
      |                               ^~~~~~~~~~~~~~~~~~~~~
/home/elmarco/src/qemu/contrib/libvhost-user/libvhost-user.c: In function ‘vu_set_vring_addr_exec’:
/home/elmarco/src/qemu/contrib/libvhost-user/libvhost-user.c:817:36: warning: taking address of packed member of ‘struct VhostUserMsg’ may result in an unaligned pointer value [-Waddress-of-packed-member]
  817 |     struct vhost_vring_addr *vra = &vmsg->payload.addr;
      |                                    ^~~~~~~~~~~~~~~~~~~

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190503130034.24916-2-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-05-10 12:48:35 +02:00
Alex Bennée
9b21a36cd3 linux-user: fix GPROF build failure
When linux-user/exit was introduced we failed to move the gprof
include at the same time. The CI didn't notice because it only builds
system emulation. Fix it for those that still find gprof useful.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-Id: <20190502092728.32727-1-alex.bennee@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-10 12:44:23 +02:00
Alex Bennée
716cdbe0e8 linux-user: avoid treading on gprof's SIGPROF signals
The guest tends to get confused when it receives signals it doesn't
know about. Given the gprof magic has also set up it's own handler we
would do well to avoid stomping on it as well.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20190502145846.26226-1-alex.bennee@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-10 12:44:23 +02:00
Giuseppe Musacchio
d87146bce0 linux-user: elf: Map empty PT_LOAD segments
Some PT_LOAD segments may be completely zeroed out and their p_filesize
is zero, in that case the loader should just allocate a page that's at
least p_memsz bytes large (plus eventual alignment padding).

Calling zero_bss does this job for us, all we have to do is make sure we
don't try to mmap a zero-length page.

Signed-off-by: Giuseppe Musacchio <thatlemon@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190503122007.lkjsvztgt4ycovac@debian>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-10 12:44:22 +02:00
Erik Kline
43330b7169 The ioctl(SIOCGIFNAME) call requires a struct ifreq.
Signed-off-by: Erik Kline <ek@google.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/1814352
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190423222005.246981-1-ek@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-10 12:44:00 +02:00
Stefan Hajnoczi
e84125761f docs: add Security chapter to the documentation
This new chapter in the QEMU documentation covers the security
requirements that QEMU is designed to meet and principles for securely
deploying QEMU.

It is just a starting point that can be extended in the future with more
information.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-id: 20190509121820.16294-3-stefanha@redhat.com
Message-Id: <20190509121820.16294-3-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:52 +01:00
Stefan Hajnoczi
e9d95d0163 docs: add Secure Coding Practices to developer docs
At KVM Forum 2018 I gave a presentation on security in QEMU:
https://www.youtube.com/watch?v=YAdRf_hwxU8 (video)
https://vmsplice.net/~stefan/stefanha-kvm-forum-2018.pdf (slides)

This patch adds a guide to secure coding practices.  This document
covers things that developers should know about security in QEMU.  It is
just a starting point that we can expand on later.  I hope it will be
useful as a resource for new contributors and will save code reviewers
from explaining the same concepts many times.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-id: 20190509121820.16294-2-stefanha@redhat.com
Message-Id: <20190509121820.16294-2-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:52 +01:00
Paolo Bonzini
993ed89f35 aio-posix: ensure poll mode is left when aio_notify is called
With aio=thread, adaptive polling makes latency worse rather than
better, because it delays the execution of the ThreadPool's
completion bottom half.

event_notifier_poll() does run while polling, detecting that
a bottom half was scheduled by a worker thread, but because
ctx->notifier is explicitly ignored in run_poll_handlers_once(),
scheduling the BH does not count as making progress and
run_poll_handlers() keeps running.  Fix this by recomputing
the deadline after *timeout could have changed.

With this change, ThreadPool still cannot participate in polling
but at least it does not suffer from extra latency.

Reported-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20190409122823.12416-1-pbonzini@redhat.com
Cc: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-block@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1553692145-86728-1-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20190409122823.12416-1-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:21 +01:00
Andrey Shinkevich
118f99442d block/io.c: fix for the allocation failure
On a file system used by the customer, fallocate() returns an error
if the block is not properly aligned. So, bdrv_co_pwrite_zeroes()
fails. We can handle that case the same way as it is done for the
unsupported cases, namely, call to bdrv_driver_pwritev() that writes
zeroes to an image for the unaligned chunk of the block.

Suggested-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 1554474244-553661-1-git-send-email-andrey.shinkevich@virtuozzo.com
Message-Id: <1554474244-553661-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:21 +01:00
Nikita Alekseev
66a5bdf309 block: Add coroutine_fn to bdrv_check_co_entry
bdrv_check_co_entry calls bdrv_co_check, which is a coroutine function.
Thus, it also needs to be marked as a coroutine.

Signed-off-by: Nikita Alekseev <n.alekseev2104@gmail.com>
Message-id: 20190401093051.16488-1-n.alekseev2104@gmail.com
Message-Id: <20190401093051.16488-1-n.alekseev2104@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:21 +01:00
Jules Irenge
e238a99e89 util/readline: Add braces to fix checkpatch errors
Add braces to fix errors issued by checkpatch.pl tool
"ERROR: braces {} are necessary for all arms of this statement"
Within "util/readline.c" file
Message-Id: <20190330112142.14082-1-jbi.octave@gmail.com>

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:21 +01:00
Jules Irenge
c95d4a29c3 util: readline: replace tab indent by four spaces to fix checkpatch errors
Replace tab indent by four spaces to fix errors issued by checkpatch.pl tool
"ERROR: code indent should never use tabs" within "util/readline.c" file.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20190401024406.10819-3-jbi.octave@gmail.com
Message-Id: <20190401024406.10819-3-jbi.octave@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:21 +01:00
Jules Irenge
2467f95ab3 util/readline: add a space to fix errors by checkpatch tool
util/readline: add a space to fix errors reported by checkpatch.pl tool
"ERROR: space required before the open parenthesis"
"ERROR: space required after that ..."
within "util/redline.c" file

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20190401024406.10819-2-jbi.octave@gmail.com
Message-Id: <20190401024406.10819-2-jbi.octave@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-05-10 10:53:20 +01:00
Peter Maydell
812b835fb4 Block patches:
- Fixes to qcow2's implementation of qemu-img check
 - Our SSH driver now supports bdrv_refresh_filename()
 - Miscellaneous fixes
 -----BEGIN PGP SIGNATURE-----
 
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Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2019-05-07' into staging

Block patches:
- Fixes to qcow2's implementation of qemu-img check
- Our SSH driver now supports bdrv_refresh_filename()
- Miscellaneous fixes

# gpg: Signature made Tue 07 May 2019 16:16:58 BST
# gpg:                using RSA key F407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>" [full]
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1  1829 F407 DB00 61D5 CF40

* remotes/maxreitz/tags/pull-block-2019-05-07:
  iotests: Fix iotests 110 and 126
  commit: Use bdrv_append() in commit_start()
  block: Assert that drv->bdrv_child_perm is set in bdrv_child_perm()
  block/ssh: Implement .bdrv_dirname()
  block/ssh: Implement .bdrv_refresh_filename()
  qcow2: discard bitmap when removed
  qcow2-refcount: don't mask corruptions under internal errors
  qcow2-refcount: check_refcounts_l2: don't count fixed cluster as allocated
  qcow2-refcount: check_refcounts_l2: reduce ignored overlaps
  qcow2-refcount: avoid eating RAM
  qcow2-refcount: fix check_oflag_copied

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-09 16:31:12 +01:00
Daniel P. Berrangé
b2acfb5596 linux-user: avoid string truncation warnings in uname field copying
In file included from /usr/include/string.h:494,
                 from include/qemu/osdep.h:101,
                 from linux-user/uname.c:20:
In function ‘strncpy’,
    inlined from ‘sys_uname’ at linux-user/uname.c:94:3:
/usr/include/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 64 [-Wstringop-truncation]
  106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We don't care where the NUL terminator in the original uname
field was. It suffices to copy the entire original field and
simply force a NUL terminator at the end of the new field.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190501144646.4851-1-berrange@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-09 17:27:38 +02:00
Alistair Francis
d7eb2b928a linux-user/elfload: Fix GCC 9 build warnings
Fix this warning when building with GCC9 on Fedora 30:
In function ‘strncpy’,
    inlined from ‘fill_psinfo’ at /home/alistair/qemu/linux-user/elfload.c:3208:12,
    inlined from ‘fill_note_info’ at /home/alistair/qemu/linux-user/elfload.c:3390:5,
    inlined from ‘elf_core_dump’ at /home/alistair/qemu/linux-user/elfload.c:3539:9:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ specified bound 16 equals destination size [-Werror=stringop-truncation]
  106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <c4d2b1de9efadcf1c900b91361af9302823a72a9.1556666645.git.alistair.francis@wdc.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-09 17:27:38 +02:00
Helge Deller
b9cce6d756 linux-user: Add missing IPV6 sockopts
When running ssh over IPv6 with linux-user I faced this warning:
 Unsupported setsockopt level=41 optname=67
 setsockopt IPV6_TCLASS 32: Protocol not available:

This patch adds code to the linux-user emulatation for setting and
retrieving of a few missing IPV6 options, including IPV6_TCLASS.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-09 17:27:38 +02:00
Peter Maydell
9d86d9eac9 - Fix "make check" problem that occurred with LANG=C and Python 3.5 / 3.6
- Get rid of some more dependencies on the global_qtest variable in the qtests
 - Some other small test clean-ups
 - Some copyright statement clarifications
 - Mark TARGET_FMT_lu as poisoned
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
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Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-05-09' into staging

- Fix "make check" problem that occurred with LANG=C and Python 3.5 / 3.6
- Get rid of some more dependencies on the global_qtest variable in the qtests
- Some other small test clean-ups
- Some copyright statement clarifications
- Mark TARGET_FMT_lu as poisoned

# gpg: Signature made Thu 09 May 2019 08:45:47 BST
# gpg:                using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2019-05-09:
  include/exec/poison: Mark TARGET_FMT_lu as poisoned, too
  target/sh4: Fix LGPL information in the file headers
  target/openrisc: Fix LGPL information in the file headers
  hw/i2c/smbus_ich9: Fix the confusing contributions-after-2012 statement
  tests: qpci_unplug_acpi_device_test() should not rely on global_qtest
  tests/drive_del-test: Use qtest_init() instead of qtest_start()
  tests/Makefile: Remove unused test-obj-y variable
  tests/tpm-tests: Use g_test_skip() to mark skipped tests
  tests/ide-test: Make test independent of global_qtest
  tests/test-hmp: Use qtest_init() instead of qtest_start()
  tests/qmp-cmd-test: Use qtest_init() instead of qtest_start()
  tests/megasas: Make test independent of global_qtest
  tests/tco: Make test independent of global_qtest
  tests: Force Python I/O encoding for check-qapi-schema

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-09 15:43:41 +01:00
Peter Maydell
68a7b9724f Pull request trivial branch 2019-05-03
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Merge remote-tracking branch 'remotes/vivier2/tags/trivial-branch-pull-request' into staging

Pull request trivial branch 2019-05-03

# gpg: Signature made Fri 03 May 2019 12:26:34 BST
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/trivial-branch-pull-request:
  sockets: avoid string truncation warnings when copying UNIX path
  hw/sparc/leon3: Allow load of uImage firmwares
  Makefile: Let the 'clean' rule remove qemu-ga.exe on Windows hosts
  net: Print output of "-net nic, model=help" to stdout instead of stderr
  Header cleanups
  Update configure
  configure: fix pam test warning
  qom: use object_new_with_type in object_new_with_propv
  doc: fix the configuration path
  CODING_STYLE: indent example code as all others
  CODING_STYLE: specify the indent rule for multiline code
  hw/net/pcnet: Use qemu_log_mask(GUEST_ERROR) instead of printf

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-05-09 13:36:10 +01:00