It should return the number of written bytes.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-4-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Found by reviewing the code, win_stdio_close() is called by
qemu_chr_free() which then call qemu_chr_free_common() taking care of
freeing CharDriverState*.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-3-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
DEFINE_PROP_CHR is not used (rng is not of TYPE_DEVICE)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-2-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
16550A UART device uses an oscillator to generate frequencies
(baud base), which decide communication speed. This speed could
be changed by dividing it by a divider. If the divider is
greater than the baud base, speed is set to zero, leading to a
divide by zero error. Add check to avoid it.
Reported-by: Huawei PSIRT <psirt@huawei.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <1476251888-20238-1-git-send-email-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Avoid walking the FlatView of all address spaces. Most of the
address spaces will have no log_sync callback on their listeners.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This speeds up MEMORY_LISTENER_CALL noticeably. Right now,
with many PCI devices you have N regions added to M AddressSpaces
(M = # PCI devices with bus-master enabled) and each call looks
up the whole listener list, with at least M listeners in it.
Because most of the regions in N are BARs, which are also roughly
proportional to M, the whole thing is O(M^3). This changes it
to O(M^2), which is the best we can do without rewriting the
whole thing.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This comes from free from unifying tcg_reg_alloc_mov and
tcg_reg_alloc_movi's handling of TEMP_VAL_CONST. It triggers
often on moves to cc_dst, such as the following translation
of "sub $0x3c,%esp":
before: after:
subl $0x3c,%ebp subl $0x3c,%ebp
movl %ebp,0x10(%r14) movl %ebp,0x10(%r14)
movl $0x3c,%ebx movl $0x3c,0x2c(%r14)
movl %ebx,0x2c(%r14)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1473945360-13663-1-git-send-email-pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This was found with test-i386. The issue is that instructions
such as
addr32 lea (%eax), %rax
did not perform a 32-bit extension, because the LEA translation
skipped the gen_lea_v_seg step. That step does not just add
segments, it also takes care of extending from address size to
pointer size.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
test_start/stop are used only as flags to loop on. Barriers are unnecessary,
since no dependent data is transferred among threads apart from the flags
themselves.
This commit relaxes the three accesses to test_start/stop that were
not yet relaxed.
Signed-off-by: Emilio G. Cota <cota@braap.org>
This introduces load-acquire and store-release operations in QEMU.
For now, just use them as an implementation detail of atomic_mb_read
and atomic_mb_set.
Since docs/atomics.txt documents that atomic_mb_read only synchronizes
with an atomic_mb_set of the same variable, we can use the new implementation
everywhere instead of seq-cst loads and stores.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Thanks to the acquire semantics of qemu_event_reset and qemu_event_wait,
some memory barriers can be removed.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Do not use the somewhat mysterious atomic_mb_read/atomic_mb_set,
instead make sure that the operations on QemuEvent are annotated
with the desired acquire and release semantics.
In particular, qemu_event_set wakes up the waiting thread, so it must
be a release from the POV of the waker (compare with qemu_mutex_unlock).
And it actually needs a full barrier, because that's the only thing that
provides something like a "load-release".
Use smp_mb_acquire until we have atomic_load_acquire and
atomic_store_release in atomic.h.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The output string QEMU with "--version" is very long, it does
not fit into a normal line of a terminal window anymore. By
putting the copyright information on a separate line instead,
the output looks much nicer.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1475661284-30153-1-git-send-email-thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
iSER is a new transport layer supported in Libiscsi,
iSER provides a zero-copy RDMA capable interface that can
improve performance.
In order to use the new iSER transport one need to have RDMA supported HW
and to choose iser as the protocol name in Libiscsi URI.
For now iSER memory buffers are pre-allocated and pre-registered,
hence in order to work with iSER from QEMU, one need to enable
MEMLOCK attribute in the VM to be large enough for all iSER buffers and RDMA
resources.
Signed-off-by: Roy Shterman <roysh@mellanox.com>
Message-Id: <1476000896-18632-3-git-send-email-roysh@mellanox.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
A new API to deploy zero-copy command submission. The new API takes I/O
vectors list and number of I/O vectors to submit as input parameters
when initiating the command. New API must be used if working with
iSER transport option.
Signed-off-by: Roy Shterman <roysh@mellanox.com>
Message-Id: <1476000896-18632-2-git-send-email-roysh@mellanox.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Otherwise, reads of more than 2GB fail. Until commit
7bbca9e290, reads of 2^41
bytes succeeded at least theoretically.
In fact, pdiscard ought to receive a 64-bit integer as the
count for the same reason.
Reported by Coverity.
Fixes: 7bbca9e290
Cc: qemu-stable@nongnu.org
Cc: kwolf@redhat.com
Cc: eblake@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The changes to run_on_cpu and friends mean that all helpers are passed
the CPUState of vCPU they are running on. The conversion missed the
field in commit e0eeb4a21a which
introduced bugs.
Reported-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Tested-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20161010154625.14881-1-alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
new syscalls and some obscure syscalls as well. Includes some
missed patches from earlier rounds, and dropping unicore32 target.
v2: fix the syslog patch and test build with clang-3.8
v3: drop ustat patch
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Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20160921' into staging
Linux-user changes, mostly bugfixes and adding support for some
new syscalls and some obscure syscalls as well. Includes some
missed patches from earlier rounds, and dropping unicore32 target.
v2: fix the syslog patch and test build with clang-3.8
v3: drop ustat patch
# gpg: Signature made Fri 21 Oct 2016 13:38:06 BST
# gpg: using RSA key 0xB44890DEDE3C9BC0
# gpg: Good signature from "Riku Voipio <riku.voipio@iki.fi>"
# gpg: aka "Riku Voipio <riku.voipio@linaro.org>"
# Primary key fingerprint: FF82 03C8 C391 98AE 0581 41EF B448 90DE DE3C 9BC0
* remotes/riku/tags/pull-linux-user-20160921: (21 commits)
linux-user: disable unicore32 linux-user build
linux-user: added support for pwritev() system call.
linux-user: added support for preadv() system call.
linux-user: Fix fadvise64() syscall support for Mips32
linux-user: Redirect termbits.h for Mips64 to termbits.h for Mips32
linux-user: Update ioctls definitions for Mips32
linux-user: Update mips_syscall_args[] array in main.c
linux-user: Add support for syncfs() syscall
linux-user: Add support for clock_adjtime() syscall
linux-user: Fix definition of target_sigevent for 32-bit guests
linux-user: use libc wrapper instead of direct mremap syscall
linux-user: Don't use alloca() for epoll_wait's epoll event array
linux-user: add RTA_PRIORITY in netlink
linux-user: add kcmp() syscall
linux-user: sparc64: Use correct target SHMLBA in shmat()
linux-user: Remove a duplicate item from strace.list
linux-user: Fix syslog() syscall support
linux-user: Fix socketcall() syscall support
linux-user: Fix msgrcv() and msgsnd() syscalls support
linux-user: Fix mq_open() syscall support
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In order to cleanup linux-user, we need support for most relatively
modern syscalls. unicore32 lacks support for syscalls like
epoll_pwait, preventing cleaning up the CONFIG_EPOLL mess.
This patch can be reverted when unicore32 starts either supporting
the syscalls as defined in mainline kernel, or the oldabi interface
gains support for syscalls supported since at kernel 2.6.19 / glibc 2.6
Cc: MPRC <zhangheng@mprc.pku.edu.cn>
Cc: Xuetao Guan <gxt@mprc.pku.edu.cn>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This system call performs the same task as the writev() system call,
with the exception of having the fourth argument, offset, which
specifes the file offset at which the input operation is to be performed.
Because of this, the pwritev() implementation is based on the writev()
implementation in linux-user mode.
But, since pwritev() is implemented in the kernel as a 5-argument syscall,
5 arguments are needed to be handled as input and passed to the host
syscall.
The pos_l and pos_h argument of the safe_pwritev() are of type unsigned
long, which can be of different sizes on different platforms. The input
arguments are converted to the appropriate host size when passed to
safe_pwritev().
Signed-off-by: Dejan Jovicevic <dejan.jovicevic@rt-rk.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This system call performs the same task as the readv() system call,
with the exception of having the fourth argument, offset, which
specifes the file offset at which the input operation is to be performed.
Because of this, the preadv() implementation is based on the readv()
implementation in linux-user mode.
But, since preadv() is implemented in the kernel as a 5-argument syscall,
5 arguments are needed to be handled as input and passed to the host
syscall.
The pos_l and pos_h argument of the safe_preadv() are of type unsigned
long, which can be of different sizes on different platforms. The input
arguments are converted to the appropriate host size when passed to
safe_preadv().
Signed-off-by: Dejan Jovicevic <dejan.jovicevic@rt-rk.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
By looking at the file arch/mips/kernel/scall32-o32.S in Linux
kernel, it can be deduced that, for Mips32 platform, syscall
corresponding to number _NR_fadvise64 as defined in kernel file
arch/mips/include/uapi/asm/unistd.h translates to kernel function
sys_fadvise64_64, and that argument layout for this system call is
as follows:
0 32 0 32
+----------------+----------------+
(arg1) | fd | __pad | (arg2)
+----------------+----------------+
(arg3) | buffer | (arg4)
+----------------+----------------+
(arg5) | len | (arg6)
+----------------+----------------+
(arg7) | advise | not used | (arg8)
+----------------+----------------+
The same argument layout can be deduced from glibc code, and
relevant commit messages in linux kernel and glibc.
The fix is to change TARGET_NR_fadvise64 to TARGET_NR_fadvise64_64
in Mips32 syscall numbers table. Array mips_syscall_args[] in
linux-user/main.c also already have "fadvise64_64" (and not
"fadvise64") in corresponding place for the syscall number in
question, so no change for linux-user/main.c.
This patch also fixes the failure LTP test posix_fadvise03, if
executed on Qemu-emulated Mips32 platform (user mode).
Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@imgtec.com>
Signed-off-by: Miroslav Tisma <miroslav.tisma@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user/mips64/termbits.h and linux-user/mips/termbits.h
originate from the same files in Linux kernel. There is no plan
to split original headers in Linux kernel into Mips32 and Mips64
versions any time soon. Therefore, it is better not to have
separate Mips32 and Mips64 variants in Qemu.
This patch makes these two files effectively the same, allowing the
mainenance by changing only a single file. (This is already done in
the same fashion for some other headers in same directories.)
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Array mips_syscall_args[] determines number of arguments for each
syscall on Mips32. It wasn't updated with newer syscalls. Also,
preadv and pwritev have 5 arguments, not 6.
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This patch implements Qemu user mode syncfs() syscall support. Syscall
syncfs() syncs the filesystem containing file determined by the open
file descriptor passed as the argument to syncfs().
The implementation consists of a straightforward invocation of host's
syncfs(). Configure and strace support is included as well.
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This patch implements Qemu user mode clock_adjtime() syscall support.
The implementation is based on invocation of host's clock_adjtime().
Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The sigevent structure includes a union with some fields which
are pointers. For the QEMU target_sigevent structure we must
represent these as abi_ulongs, not host function pointers.
This error was causing the compiler to believe it should 8-align
the _sigev_un union on a 64-bit host, which meant that the
code in target_to_host_sigevent() was looking at the wrong
offset to find the _tid field, and timer_create() would
spuriously fail with EINVAL.
This fixes the final loose end noted in LP:1042388.
While we're editing the structure, switch the 'int32_t' fields
to 'abi_int'; this will only matter for guests with non-standard
integer alignment like m68k.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit essentially reverts commit
3af72a4d98, which has replaced
five-argument calls to mremap() by direct mremap syscalls for
compatibility with glibc older than version 2.4.
The direct syscall was buggy for 64bit targets on 32bit hosts
because of the default integer type promotions. Since glibc-2.4
is now a decade old, we can remove this workaround.
Signed-off-by: Felix Janda <felix.janda@posteo.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The epoll event array which epoll_wait() allocates has a size
determined by the guest which could potentially be quite large.
Use g_try_new() rather than alloca() so that we can fail more
cleanly if the guest hands us an oversize value. (ENOMEM is
not a documented return value for epoll_wait() but in practice
some kernel configurations can return it -- see for instance
sys_oabi_epoll_wait() on ARM.)
This rearrangement includes fixing a bug where we were
incorrectly passing a negative length to unlock_user() in
the error-exit codepath.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Used by fedora21 on ppc64 in the network initialization
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
In commit 40df8c0c0722 support was added for target-specific
handling of SHMLBA. Unfortunately the sparc64-specific part
of the change got lost somewhere between the patch being
posted to the list and going into master:
http://patchwork.ozlabs.org/patch/646980/http://patchwork.ozlabs.org/patch/673339/
Add the accidentally-dropped code.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
There is a duplicate item in strace.list. It is benign, but it
shouldn't be there, since it may lead to confusion and even bugs
in the future. It is the only duplicate in strace.list. This
patch removes it.
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
There are currently several problems related to syslog() support.
For example, if the second argument "bufp" of target syslog() syscall
is NULL, the current implementation always returns error code EFAULT.
However, NULL is a perfectly valid value for the second argument for
many use cases of this syscall. This is, for example, visible from
this excerpt of man page for syslog(2):
> EINVAL Bad arguments (e.g., bad type; or for type 2, 3, or 4, buf is
> NULL, or len is less than zero; or for type 8, the level is
> outside the range 1 to 8).
Moreover, the argument "bufp" is ignored for all cases of values of the
first argument, except 2, 3 and 4. This means that for such cases
(the first argument is not 2, 3 or 4), there is no need to pass "buf"
between host and target, and it can be set to NULL while calling host's
syslog(), without loss of emulation accuracy.
Note also that if "bufp" is NULL and the first argument is 2, 3 or 4, the
correct returned error code is EINVAL, not EFAULT.
All these details are reflected in this patch.
"#ifdef TARGET_NR_syslog" is also proprerly inserted when needed.
Support for Qemu's "-strace" switch for syslog() syscall is included too.
LTP tests syslog11 and syslog12 pass with this patch (while fail without
it), on any platform.
Changes to original patch by Riku Voipio:
fixed error paths in TARGET_SYSLOG_ACTION_READ_ALL to match
http://lxr.free-electrons.com/source/kernel/printk/printk.c?v=4.7#L1335
Should fix also the build error in:
https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg03721.html
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Since not all Linux host platforms support socketcall() (most notably
Intel), do_socketcall() function in Qemu's syscalls.c is implemented to
mirror the corespondant implementation of socketcall() in Linux kernel,
and to utilise individual socket operations that are supported on all
Linux platforms. (see kernel source file net/socket.c, definition of
socketcall).
However, error codes produced by Qemu implementation are wrong for the
cases of invalid values of the first argument. Also, naming of constants
is not consistent with kernel one, and not consistant with Qemu convention
of prefixing such constants with "TARGET_". This patch in that light
brings do_socketcall() closer to its kernel counterpart, and in that way
fixes the errors and yields more consisrtent Qemu code.
There were also three missing cases (among 20) for strace support for
socketcall(). The array that contains pointers for appropriate printing
functions is updated with 3 elements, however pointers to functions are
left NULL, and its implementation is left for future.
Also, this patch fixes failure of LTP test socketcall02, if executed on some
Qemu emulated sywstems (uer mode).
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
If syscalls msgrcv() and msgsnd() fail, they return E2BIG, EACCES,
EAGAIN, EFAULT, EIDRM, EINTR, EINVAL, ENOMEM, or ENOMSG.
By examining negative scenarios of these syscalls for Mips, it was
established that ENOMSG does not have the same value accross all
platforms, but it is nevertheless not included for conversion in
the correspondant conversion table defined in linux-user/syscall.c.
This is certainly a bug, since it leads to the incorrect emulation
of msgrcv() and msgsnd() for scenarios involving ENOMSG.
This patch fixes this by extending the conversion table to include
ENOMSG.
Also, LTP test msgrcv04 will be fixed for some platforms.
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Conversion of file creation flags (O_CREAT, ...) from target to host
was missing.
Also, this patch implements better error handling.
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This patch implements Qemu user mode adjtimex() syscall support.
Syscall adjtimex() reads and optionally sets parameters for a clock
adjustment algorithm used in network synchonization or similar scenarios.
Its declaration is:
int adjtimex(struct timex *buf);
The correspondent source code in the Linux kernel is at kernel/time.c,
line 206.
The Qemu implementation is based on invocation of host's adjtimex(), and
its key part is in the "TARGET_NR_adjtimex" case segment of the the main
switch statement of the function do_syscall(), in linux-user/syscalls.c. All
necessary conversions of the data structures from target to host and from
host to target are covered. Two new functions, target_to_host_timex() and
host_to_target_timex(), are provided for the purpose of such conversions.
For that purpose, the support for related structure "timex" had tp be added
to the file linux-user/syscall_defs.h, based on its definition in Linux
kernel. Also, the relevant support for "-strace" Qemu option is included
in files linux-user/strace.c and linux-user/strace.list.
This patch also fixes failures of LTP tests adjtimex01 and adjtimex02, if
executed in Qemu user mode.
Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The gcrypt threads implementation must be set before calling
any other gcrypt APIs, especially gcry_check_version(),
since that triggers initialization of the random pool. After
that is initialized, changes to the threads impl won't be
honoured by the random pool code. This means that gcrypt
will think thread locking is needed and so try to acquire
the random pool mutex, but this is NULL as no threads impl
was set originally. This results in a crash in the random
pool code.
For the same reasons, we must set the gcrypt threads impl
before calling gnutls_init, since that will also trigger
gcry_check_version
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The test-io-channel-tls test was missing a call to qcrypto_init
and test-crypto-hash was initializing it multiple times,
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
CC tests/test-crypto-tlscredsx509.o
CC tests/crypto-tls-x509-helpers.o
CC tests/pkix_asn1_tab.o
tests/pkix_asn1_tab.c:7:22: warning: libtasn1.h: No such file or directory
tests/pkix_asn1_tab.c:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘pkix_asn1_tab’
make: *** [tests/pkix_asn1_tab.o] Error 1
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce CTR mode support for the cipher APIs.
CTR mode uses a counter rather than a traditional IV.
The counter has additional properties, including a nonce
and initial counter block. We reuse the ctx->iv as
the counter for conveniences.
Both libgcrypt and nettle are support CTR mode, the
cipher-builtin doesn't support yet.
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Marc-André Lureau
Prasad J Pandit
Paolo Bonzini
Emilio G. Cota
Thomas Huth
Roy Shterman
Alex Bennée
Peter Maydell
Riku Voipio
Dejan Jovicevic
Aleksandar Markovic
Felix Janda
Laurent Vivier
Daniel P. Berrange
Gonglei