Commit Graph

739 Commits

Author SHA1 Message Date
Vladimir Sementsov-Ogievskiy
6bdc8b719a block/dirty-bitmap: add deserialize_ones func
Add bdrv_dirty_bitmap_deserialize_ones() function, which is needed for
qcow2 bitmap loading, to handle unallocated bitmap parts, marked as
all-ones.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170628120530.31251-7-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-07-11 17:44:57 +02:00
Vladimir Sementsov-Ogievskiy
f63ea4e92b hbitmap: improve dirty iter
Make dirty iter resistant to resetting bits in corresponding HBitmap.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170628120530.31251-4-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-07-11 17:44:57 +02:00
Daniel P. Berrange
788cf9f8c8 block: rip out all traces of password prompting
Now that qcow & qcow2 are wired up to get encryption keys
via the QCryptoSecret object, nothing is relying on the
interactive prompting for passwords. All the code related
to password prompting can thus be ripped out.

Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170623162419.26068-17-berrange@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-07-11 17:44:56 +02:00
Mao Zhongyi
3bcf7d7df5 util/qemu-sockets: Drop unused helper socket_address_to_string()
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-07-11 11:18:37 +03:00
Pranith Kumar
2ae96c157a util/cacheinfo: Fix warning generated by clang
Clang generates the following warning on aarch64 host:

  CC      util/cacheinfo.o
/home/pranith/qemu/util/cacheinfo.c:121:48: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
        asm volatile("mrs\t%0, ctr_el0" : "=r"(ctr));
                                               ^
/home/pranith/qemu/util/cacheinfo.c:121:28: note: use constraint modifier "w"
        asm volatile("mrs\t%0, ctr_el0" : "=r"(ctr));
                           ^~
                           %w0

Constraint modifier 'w' is not (yet?) accepted by gcc. Fix this by increasing the ctr size.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20170630153946.11997-1-bobby.prani@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-07-09 21:10:23 -10:00
Fam Zheng
c096358e74 qemu-thread: Assert locks are initialized before using
Not all platforms check whether a lock is initialized before used.  In
particular Linux seems to be more permissive than OSX.

Check initialization state explicitly in our code to catch such bugs
earlier.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170704122325.25634-1-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-04 14:39:28 +02:00
Peter Maydell
de5f852f38 main_loop: Make main_loop_wait() return void
The last users of main_loop_wait() that cared about the return value
have now been changed to no longer use it. Drop the now-useless return
value and make the function return void.

We avoid the awkwardness of ifdeffery to handle the 'ret'
variable in main_loop_wait() only being wanted if CONFIG_SLIRP
by simply dropping all the ifdefs. There are stub implementations
of slirp_pollfds_poll() and slirp_pollfds_fill() already in
stubs/slirp.c which do nothing, as required.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <1498584769-12439-3-git-send-email-peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-04 14:39:28 +02:00
Alistair Francis
0ec7b53482 util/oslib-win32: Remove if conditional
The original ready < nhandles - 1 can be re-written as ready + 1 <
nhandles.  The check was actually incorrect because
WAIT_OBJECT_0 was not subtracted from ready; it worked because
WAIT_OBJECT_0 is zero.  After subtracting WAIT_OBJECT_0,
the result is the same condition that we are checking on the first
itteration of the for loop. This means we can remove the if statement
and let the for loop check the code.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Message-Id: <a14083d681951f3999a0e9314605cb706381ae8d.1498756113.git.alistair.francis@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-04 14:39:27 +02:00
Daniel P. Berrange
56382bd577 sockets: avoid formatting buffer that may not be NUL terminated
The 'sun_path' field in the sockaddr_un struct is not required
to be NUL termianted, so when reporting an error, we must use
the separate 'path' variable which is guaranteed terminated.

Fixes a bug spotted by coverity that was introduced in

  commit ad9579aaa1
  Author: Daniel P. Berrange <berrange@redhat.com>
  Date:   Thu May 25 16:53:00 2017 +0100

    sockets: improve error reporting if UNIX socket path is too long

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <20170626103756.22974-1-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-04 14:39:27 +02:00
Peter Maydell
84e3d0725b QAPI patches for 2017-06-09
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Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2017-06-09-v2' into staging

QAPI patches for 2017-06-09

# gpg: Signature made Tue 20 Jun 2017 13:31:39 BST
# gpg:                using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-qapi-2017-06-09-v2: (41 commits)
  tests/qdict: check more get_try_int() cases
  console: use get_uint() for "head" property
  i386/cpu: use get_uint() for "min-level"/"min-xlevel" properties
  numa: use get_uint() for "size" property
  pnv-core: use get_uint() for "core-pir" property
  pvpanic: use get_uint() for "ioport" property
  auxbus: use get_uint() for "addr" property
  arm: use get_uint() for "mp-affinity" property
  xen: use get_uint() for "max-ram-below-4g" property
  pc: use get_uint() for "hpet-intcap" property
  pc: use get_uint() for "apic-id" property
  pc: use get_uint() for "iobase" property
  acpi: use get_uint() for "pci-hole*" properties
  acpi: use get_uint() for various acpi properties
  acpi: use get_uint() for "acpi-pcihp-io*" properties
  platform-bus: use get_uint() for "addr" property
  bcm2835_fb: use {get, set}_uint() for "vcram-size" and "vcram-base"
  aspeed: use {set, get}_uint() for "ram-size" property
  pcihp: use get_uint() for "bsel" property
  pc-dimm: make "size" property uint64
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-22 11:34:39 +01:00
Peter Maydell
db7a99cdc1 Queued TCG patches
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Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20170619' into staging

Queued TCG patches

# gpg: Signature made Mon 19 Jun 2017 19:12:06 BST
# gpg:                using RSA key 0xAD1270CC4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"
# Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC  16A4 AD12 70CC 4DD0 279B

* remotes/rth/tags/pull-tcg-20170619:
  target/arm: Exit after clearing aarch64 interrupt mask
  target/s390x: Exit after changing PSW mask
  target/alpha: Use tcg_gen_lookup_and_goto_ptr
  tcg: Increase hit rate of lookup_tb_ptr
  tcg/arm: Use ldr (literal) for goto_tb
  tcg/arm: Try pc-relative addresses for movi
  tcg/arm: Remove limit on code buffer size
  tcg/arm: Use indirect branch for goto_tb
  tcg/aarch64: Use ADR in tcg_out_movi
  translate-all: consolidate tb init in tb_gen_code
  tcg: allocate TB structs before the corresponding translated code
  util: add cacheinfo

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-22 10:25:03 +01:00
Marc-André Lureau
01b2ffcedd qapi: merge QInt and QFloat in QNum
We would like to use a same QObject type to represent numbers, whether
they are int, uint, or floats. Getters will allow some compatibility
between the various types if the number fits other representations.

Add a few more tests while at it.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170607163635.17635-7-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[parse_stats_intervals() simplified a bit, comment in
test_visitor_in_int_overflow() tidied up, suppress bogus warnings]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-06-20 14:31:31 +02:00
Emilio G. Cota
b255b2c8a5 util: add cacheinfo
Add helpers to gather cache info from the host at init-time.

For now, only export the host's I/D cache line sizes, which we
will use to improve cache locality to avoid false sharing.

Suggested-by: Richard Henderson <rth@twiddle.net>
Suggested-by: Geert Martin Ijewski <gm.ijewski@web.de>
Tested-by:    Geert Martin Ijewski <gm.ijewski@web.de>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1496794624-4083-1-git-send-email-cota@braap.org>
[rth: Move all implementations from tcg/ppc/]
Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-06-19 11:10:59 -07:00
Paolo Bonzini
ae2d489c34 util: add stats64 module
This module provides fast paths for 64-bit atomic operations on machines
that only have 32-bit atomic access.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170605123908.18777-11-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2017-06-16 07:55:00 +08:00
Peter Maydell
2a8469aaab -----BEGIN PGP SIGNATURE-----
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Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

# gpg: Signature made Wed 07 Jun 2017 19:06:51 BST
# gpg:                using RSA key 0x9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/block-pull-request:
  configure: split c and cxx extra flags
  coroutine-lock: do not touch coroutine after another one has been entered
  .gdbinit: load QEMU sub-commands when gdb starts
  coccinelle: fix typo in comment
  oslib: strip trailing '\n' from error_setg() string argument

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-12 14:14:42 +01:00
Daniel P. Berrange
ad9579aaa1 sockets: improve error reporting if UNIX socket path is too long
The 'struct sockaddr_un' only allows 108 bytes for the socket
path.

If the user supplies a path, QEMU uses snprintf() to silently
truncate it when too long. This is undesirable because the user
will then be unable to connect to the path they asked for.

If the user doesn't supply a path, QEMU builds one based on
TMPDIR, but if that leads to an overlong path, it mistakenly
uses error_setg_errno() with a stale errno value, because
snprintf() does not set errno on truncation.

In solving this the code needed some refactoring to ensure we
don't pass 'un.sun_path' directly to any APIs which expect
NUL-terminated strings, because the path is not required to
be terminated.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <20170525155300.22743-1-berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-07 18:22:02 +02:00
Roman Pen
528f449f59 coroutine-lock: do not touch coroutine after another one has been entered
Submission of requests on linux aio is a bit tricky and can lead to
requests completions on submission path:

44713c9e85 ("linux-aio: Handle io_submit() failure gracefully")
0ed93d84ed ("linux-aio: process completions from ioq_submit()")

That means that any coroutine which has been yielded in order to wait
for completion can be resumed from submission path and be eventually
terminated (freed).

The following use-after-free crash was observed when IO throttling
was enabled:

 Program received signal SIGSEGV, Segmentation fault.
 [Switching to Thread 0x7f5813dff700 (LWP 56417)]
 virtqueue_unmap_sg (elem=0x7f5804009a30, len=1, vq=<optimized out>) at virtio.c:252
 (gdb) bt
 #0  virtqueue_unmap_sg (elem=0x7f5804009a30, len=1, vq=<optimized out>) at virtio.c:252
                              ^^^^^^^^^^^^^^
                              remember the address

 #1  virtqueue_fill (vq=0x5598b20d21b0, elem=0x7f5804009a30, len=1, idx=0) at virtio.c:282
 #2  virtqueue_push (vq=0x5598b20d21b0, elem=elem@entry=0x7f5804009a30, len=<optimized out>) at virtio.c:308
 #3  virtio_blk_req_complete (req=req@entry=0x7f5804009a30, status=status@entry=0 '\000') at virtio-blk.c:61
 #4  virtio_blk_rw_complete (opaque=<optimized out>, ret=0) at virtio-blk.c:126
 #5  blk_aio_complete (acb=0x7f58040068d0) at block-backend.c:923
 #6  coroutine_trampoline (i0=<optimized out>, i1=<optimized out>) at coroutine-ucontext.c:78

 (gdb) p * elem
 $8 = {index = 77, out_num = 2, in_num = 1,
       in_addr = 0x7f5804009ad8, out_addr = 0x7f5804009ae0,
       in_sg = 0x0, out_sg = 0x7f5804009a50}
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       'in_sg' and 'out_sg' are invalid.
       e.g. it is impossible that 'in_sg' is zero,
       instead its value must be equal to:

       (gdb) p/x 0x7f5804009ad8 + sizeof(elem->in_addr[0]) + 2 * sizeof(elem->out_addr[0])
       $26 = 0x7f5804009af0

Seems 'elem' was corrupted.  Meanwhile another thread raised an abort:

 Thread 12 (Thread 0x7f57f2ffd700 (LWP 56426)):
 #0  raise () from /lib/x86_64-linux-gnu/libc.so.6
 #1  abort () from /lib/x86_64-linux-gnu/libc.so.6
 #2  qemu_coroutine_enter (co=0x7f5804009af0) at qemu-coroutine.c:113
 #3  qemu_co_queue_run_restart (co=0x7f5804009a30) at qemu-coroutine-lock.c:60
 #4  qemu_coroutine_enter (co=0x7f5804009a30) at qemu-coroutine.c:119
                           ^^^^^^^^^^^^^^^^^^
                           WTF?? this is equal to elem from crashed thread

 #5  qemu_co_queue_run_restart (co=0x7f57e7f16ae0) at qemu-coroutine-lock.c:60
 #6  qemu_coroutine_enter (co=0x7f57e7f16ae0) at qemu-coroutine.c:119
 #7  qemu_co_queue_run_restart (co=0x7f5807e112a0) at qemu-coroutine-lock.c:60
 #8  qemu_coroutine_enter (co=0x7f5807e112a0) at qemu-coroutine.c:119
 #9  qemu_co_queue_run_restart (co=0x7f5807f17820) at qemu-coroutine-lock.c:60
 #10 qemu_coroutine_enter (co=0x7f5807f17820) at qemu-coroutine.c:119
 #11 qemu_co_queue_run_restart (co=0x7f57e7f18e10) at qemu-coroutine-lock.c:60
 #12 qemu_coroutine_enter (co=0x7f57e7f18e10) at qemu-coroutine.c:119
 #13 qemu_co_enter_next (queue=queue@entry=0x5598b1e742d0) at qemu-coroutine-lock.c:106
 #14 timer_cb (blk=0x5598b1e74280, is_write=<optimized out>) at throttle-groups.c:419

Crash can be explained by access of 'co' object from the loop inside
qemu_co_queue_run_restart():

  while ((next = QSIMPLEQ_FIRST(&co->co_queue_wakeup))) {
      QSIMPLEQ_REMOVE_HEAD(&co->co_queue_wakeup, co_queue_next);
                           ^^^^^^^^^^^^^^^^^^^^
                           on each iteration 'co' is accessed,
                           but 'co' can be already freed

      qemu_coroutine_enter(next);
  }

When 'next' coroutine is resumed (entered) it can in its turn resume
'co', and eventually free it.  That's why we see 'co' (which was freed)
has the same address as 'elem' from the first backtrace.

The fix is obvious: use temporary queue and do not touch coroutine after
first qemu_coroutine_enter() is invoked.

The issue is quite rare and happens every ~12 hours on very high IO
and CPU load (building linux kernel with -j512 inside guest) when IO
throttling is enabled.  With the fix applied guest is running ~35 hours
and is still alive so far.

Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170601160847.23720-1-roman.penyaev@profitbricks.com
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Fam Zheng <famz@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-devel@nongnu.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-06-07 14:39:00 +01:00
Philippe Mathieu-Daudé
462e5d5065 oslib: strip trailing '\n' from error_setg() string argument
spotted by Coccinelle script scripts/coccinelle/err-bad-newline.cocci

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-06-07 14:38:44 +01:00
Stefano Stabellini
7e6478e7d4 Check the return value of fcntl in qemu_set_cloexec
Assert that the return value is not an error. This issue was found by
Coverity.

CID: 1374831

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
CC: groug@kaod.org
CC: pbonzini@redhat.com
CC: Eric Blake <eblake@redhat.com>
Message-Id: <1494356693-13190-2-git-send-email-sstabellini@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-06 20:18:35 +02:00
Marc-André Lureau
f664b88247 Remove/replace sysemu/char.h inclusion
Those are apparently unnecessary includes.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02 11:33:52 +04:00
Peter Maydell
43771d5d92 QAPI patches for 2017-05-31
-----BEGIN PGP SIGNATURE-----
 
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Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2017-05-31' into staging

QAPI patches for 2017-05-31

# gpg: Signature made Wed 31 May 2017 18:06:39 BST
# gpg:                using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-qapi-2017-05-31:
  qapi: Reject alternates that can't work with keyval_parse()
  tests/qapi-schema: Avoid 'str' in alternate test cases
  qapi: Document visit_type_any() issues with keyval input
  qobject-input-visitor: Reject non-finite numbers with keyval

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-01 16:39:16 +01:00
Peter Maydell
066ae4f829 Various bugfixes and code cleanups. Most notably, it fixes metadata handling in
mapped-file security mode (especially for the virtfs root).
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 =KTTf
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/gkurz/tags/for-upstream' into staging

Various bugfixes and code cleanups. Most notably, it fixes metadata handling in
mapped-file security mode (especially for the virtfs root).

# gpg: Signature made Tue 30 May 2017 14:36:22 BST
# gpg:                using DSA key 0x02FC3AEB0101DBC2
# gpg: Good signature from "Greg Kurz <groug@kaod.org>"
# gpg:                 aka "Greg Kurz <groug@free.fr>"
# gpg:                 aka "Greg Kurz <gkurz@linux.vnet.ibm.com>"
# gpg:                 aka "Gregory Kurz (Groug) <groug@free.fr>"
# gpg:                 aka "[jpeg image of size 3330]"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 2BD4 3B44 535E C0A7 9894  DBA2 02FC 3AEB 0101 DBC2

* remotes/gkurz/tags/for-upstream:
  9pfs: local: metadata file for the VirtFS root
  9pfs: local: simplify file opening
  9pfs: local: resolve special directories in paths
  9pfs: check return value of v9fs_co_name_to_path()
  util: drop old utimensat() compat code
  9pfs: assume utimensat() and futimens() are present
  fsdev: fix virtfs-proxy-helper cwd
  9pfs: local: fix unlink of alien files in mapped-file mode
  9pfs: drop pdu_push_and_notify()
  fsdev: don't allow unknown format in marshal/unmarshal
  virtio-9p/xen-9p: move 9p specific bits to core 9p code

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-01 12:06:58 +01:00
Markus Armbruster
c0644771eb qapi: Reject alternates that can't work with keyval_parse()
Alternates are sum types like unions, but use the JSON type on the
wire / QType in QObject instead of an explicit tag.  That's why we
require alternate members to have distinct QTypes.

The recently introduced keyval_parse() (commit d454dbe) can only
produce string scalars.  The qobject_input_visitor_new_keyval() input
visitor mostly hides the difference, so code using a QObject input
visitor doesn't have to care whether its input was parsed from JSON or
KEY=VALUE,...  The difference leaks for alternates, as noted in commit
0ee9ae7: a non-string, non-enum scalar alternate value can't currently
be expressed.

In part, this is just our insufficiently sophisticated implementation.
Consider alternate type 'GuestFileWhence'.  It has an integer member
and a 'QGASeek' member.  The latter is an enumeration with values
'set', 'cur', 'end'.  The meaning of b=set, b=cur, b=end, b=0, b=1 and
so forth is perfectly obvious.  However, our current implementation
falls apart at run time for b=0, b=1, and so forth.  Fixable, but not
today; add a test case and a TODO comment.

Now consider an alternate type with a string and an integer member.
What's the meaning of a=42?  Is it the string "42" or the integer 42?
Whichever meaning you pick makes the other inexpressible.  This isn't
just an implementation problem, it's fundamental.  Our current
implementation will pick string.

So far, we haven't needed such alternates.  To make sure we stop and
think before we add one that cannot sanely work with keyval_parse(),
let's require alternate members to have sufficiently distinct
representation in KEY=VALUE,... syntax:

* A string member clashes with any other scalar member

* An enumeration member clashes with bool members when it has value
  'on' or 'off'.

* An enumeration member clashes with numeric members when it has a
  value that starts with '-', '+', or a decimal digit.  This is a
  rather lazy approximation of the actual number syntax accepted by
  the visitor.

  Note that enumeration values starting with '-' and '+' are rejected
  elsewhere already, but better safe than sorry.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1495471335-23707-5-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2017-05-31 16:04:09 +02:00
Greg Kurz
fcdcf1eed2 util: drop old utimensat() compat code
Now that 9pfs and virtfs-proxy-helper have been converted to utimensat(),
we don't need to keep qemu_utimens() anymore.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-05-25 10:30:14 +02:00
Markus Armbruster
fc0f005958 sockets: Plug memory leak in socket_address_flatten()
socket_address_flatten() leaks a SocketAddress when its argument is
null.  Happens when opening a ChardevBackend of type 'udp' that is
configured without a local address.  Screwed up in commit bd269ebc due
to last minute semantic conflict resolution.  Spotted by Coverity.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1494866344-11013-1-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-05-23 13:28:17 +02:00
Peter Xu
22951aaaeb utils: provide size_to_str()
Moving the algorithm from print_type_size() into size_to_str() so that
other component can also leverage it. With that, refactor
print_type_size().

The assert() in that logic is removed though, since even UINT64_MAX
would not overflow.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1494562661-9063-3-git-send-email-peterx@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-05-17 17:30:45 +01:00
Stefan Hajnoczi
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Merge tag 'block-pull-request' into staging

# gpg: Signature made Fri 12 May 2017 10:37:12 AM EDT
# gpg:                using RSA key 0x9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* tag 'block-pull-request':
  aio: add missing aio_notify() to aio_enable_external()
  block: Simplify BDRV_BLOCK_RAW recursion
  coroutine: remove GThread implementation

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-12 10:39:23 -04:00
Stefan Hajnoczi
3753e255da Block layer patches
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Merge remote-tracking branch 'kwolf/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Thu 11 May 2017 10:31:37 AM EDT
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* kwolf/tags/for-upstream: (58 commits)
  MAINTAINERS: Add qemu-progress to the block layer
  qcow2: Discard/zero clusters by byte count
  qcow2: Assert that cluster operations are aligned
  qcow2: Optimize write zero of unaligned tail cluster
  iotests: Add test 179 to cover write zeroes with unmap
  iotests: Improve _filter_qemu_img_map
  qcow2: Optimize zero_single_l2() to minimize L2 churn
  qcow2: Make distinction between zero cluster types obvious
  qcow2: Name typedef for cluster type
  qcow2: Correctly report status of preallocated zero clusters
  block: Update comments on BDRV_BLOCK_* meanings
  qcow2: Use consistent switch indentation
  qcow2: Nicer variable names in qcow2_update_snapshot_refcount()
  tests: Add coverage for recent block geometry fixes
  blkdebug: Add ability to override unmap geometries
  blkdebug: Simplify override logic
  blkdebug: Add pass-through write_zero and discard support
  blkdebug: Refactor error injection
  blkdebug: Sanity check block layer guarantees
  qemu-io: Switch 'map' output to byte-based reporting
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-12 10:39:08 -04:00
Daniel P. Berrange
33c53c54e4 coroutine: remove GThread implementation
The GThread implementation is not functional enough to actually
run QEMU reliably. While it was potentially useful for debugging,
we have a scripts/qemugdb/coroutine.py to enable tracing of
ucontext coroutines in GDB, so that removes the only reason for
GThread to exist.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-12 10:36:46 -04:00
Fam Zheng
e8c1094a0e osdep: Fall back to posix lock when OFD lock is unavailable
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-05-11 11:15:32 +02:00
Fam Zheng
13461fdba6 osdep: Add qemu_lock_fd and qemu_unlock_fd
They are wrappers of POSIX fcntl "file private locking", with a
convenient "try lock" wrapper implemented with F_OFD_GETLK.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-05-11 11:15:32 +02:00
Stefan Hajnoczi
f465706e59 trivial patches for 2017-05-10
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Merge remote-tracking branch 'mjt/tags/trivial-patches-fetch' into staging

trivial patches for 2017-05-10

# gpg: Signature made Wed 10 May 2017 03:19:30 AM EDT
# gpg:                using RSA key 0x701B4F6B1A693E59
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>"
# gpg:                 aka "Michael Tokarev <mjt@corpit.ru>"
# gpg:                 aka "Michael Tokarev <mjt@debian.org>"
# Primary key fingerprint: 6EE1 95D1 886E 8FFB 810D  4324 457C E0A0 8044 65C5
#      Subkey fingerprint: 7B73 BAD6 8BE7 A2C2 8931  4B22 701B 4F6B 1A69 3E59

* mjt/tags/trivial-patches-fetch: (23 commits)
  tests: Remove redundant assignment
  MAINTAINERS: Update paths for AioContext implementation
  MAINTAINERS: Update paths for main loop
  jazz_led: fix bad snprintf
  tests: Ignore another built executable (test-hmp)
  scripts: Switch to more portable Perl shebang
  scripts/qemu-binfmt-conf.sh: Fix shell portability issue
  virtfs: allow a device id to be specified in the -virtfs option
  hw/core/generic-loader: Fix crash when running without CPU
  virtio-blk: Remove useless condition around g_free()
  qemu-doc: Fix broken URLs of amnhltm.zip and dosidle210.zip
  use _Static_assert in QEMU_BUILD_BUG_ON
  channel-file: fix wrong parameter comments
  block: Make 'replication_state' an enum
  util: Use g_malloc/g_free in envlist.c
  qga: fix compiler warnings (clang 5)
  device_tree: fix compiler warnings (clang 5)
  usb-ccid: make ccid_write_data_block() cope with null buffers
  tests: Ignore more test executables
  Add 'none' as type for drive's if option
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-10 12:31:19 -04:00
Stefan Hajnoczi
76d20ea0f1 QAPI patches for 2017-05-04
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Merge remote-tracking branch 'armbru/tags/pull-qapi-2017-05-04-v3' into staging

QAPI patches for 2017-05-04

# gpg: Signature made Tue 09 May 2017 03:16:12 AM EDT
# gpg:                using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* armbru/tags/pull-qapi-2017-05-04-v3: (28 commits)
  qmp-shell: improve help
  qmp-shell: don't show version greeting if unavailable
  qmp-shell: Cope with query-commands error
  qmp-shell: add -N option to skip negotiate
  qmp-shell: add persistent command history
  qobject-input-visitor: Catch misuse of end_struct vs. end_list
  qapi: Document intended use of @name within alternate visits
  qobject-input-visitor: Document full_name_nth()
  qmp: Improve QMP dispatch error messages
  sockets: Delete unused helper socket_address_crumple()
  sockets: Limit SocketAddressLegacy to external interfaces
  sockets: Rename SocketAddressFlat to SocketAddress
  sockets: Rename SocketAddress to SocketAddressLegacy
  qapi: New QAPI_CLONE_MEMBERS()
  sockets: Prepare inet_parse() for flattened SocketAddress
  sockets: Prepare vsock_parse() for flattened SocketAddress
  test-qga: Actually test 0xff sync bytes
  fdc-test: Avoid deprecated 'change' command
  QemuOpts: Simplify qemu_opts_to_qdict()
  block: Simplify bdrv_append_temp_snapshot() logic
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-09 15:49:14 -04:00
Markus Armbruster
0c099fa7e9 sockets: Delete unused helper socket_address_crumple()
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-8-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Commit message typo fixed]
2017-05-09 09:14:40 +02:00
Markus Armbruster
bd269ebc82 sockets: Limit SocketAddressLegacy to external interfaces
SocketAddressLegacy is a simple union, and simple unions are awkward:
they have their variant members wrapped in a "data" object on the
wire, and require additional indirections in C.  SocketAddress is the
equivalent flat union.  Convert all users of SocketAddressLegacy to
SocketAddress, except for existing external interfaces.

See also commit fce5d53..9445673 and 85a82e8..c5f1ae3.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-7-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Minor editing accident fixed, commit message and a comment tweaked]

Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-09 09:14:40 +02:00
Markus Armbruster
62cf396b5d sockets: Rename SocketAddressFlat to SocketAddress
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-6-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
2017-05-09 09:14:40 +02:00
Markus Armbruster
dfd100f242 sockets: Rename SocketAddress to SocketAddressLegacy
The next commit will rename SocketAddressFlat to SocketAddress, and
the commit after that will replace most uses of SocketAddressLegacy by
SocketAddress, replacing most of this commit's renames right back.

Note that checkpatch emits a few "line over 80 characters" warnings.
The long lines are all temporary; the SocketAddressLegacy replacement
will shorten them again.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-5-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-09 09:14:40 +02:00
Markus Armbruster
0785bd7a7c sockets: Prepare inet_parse() for flattened SocketAddress
I'm going to flatten SocketAddress: rename SocketAddress to
SocketAddressLegacy, SocketAddressFlat to SocketAddress, eliminate
SocketAddressLegacy except in external interfaces.

inet_parse() returns a newly allocated InetSocketAddress.  Lift the
allocation from inet_parse() into its caller socket_parse() to prepare
for flattening SocketAddress.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-3-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Straightforward rebase]
2017-05-09 09:14:40 +02:00
Markus Armbruster
4db5c619a2 sockets: Prepare vsock_parse() for flattened SocketAddress
I'm going to flatten SocketAddress: rename SocketAddress to
SocketAddressLegacy, SocketAddressFlat to SocketAddress, eliminate
SocketAddressLegacy except in external interfaces.

vsock_parse() returns a newly allocated VsockSocketAddress.  Lift the
allocation from vsock_parse() into its caller socket_parse() to
prepare for flattening SocketAddress.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-2-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-05-09 09:14:40 +02:00
Eric Blake
28934e0c75 QemuOpts: Simplify qemu_opts_to_qdict()
Noticed while investigating Coccinelle cleanups. There is no need
for a temporary variable when we can use the new macro to do the
same thing with less typing.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-9-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-09 09:14:39 +02:00
Eric Blake
46f5ac205a qobject: Use simpler QDict/QList scalar insertion macros
We now have macros in place to make it less verbose to add a scalar
to QDict and QList, so use them.

Patch created mechanically via:
  spatch --sp-file scripts/coccinelle/qobject.cocci \
    --macro-file scripts/cocci-macro-file.h --dir . --in-place
then touched up manually to fix a couple of '?:' back to original
spacing, as well as avoiding a long line in monitor.c.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-7-eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-09 09:13:51 +02:00
Stefan Hajnoczi
1c5d506101 A large set of small patches. I have not included yet vhost-user-scsi,
but it'll come in the next pull request.
 
 * use GDB XML register description for x86
 * use _Static_assert in QEMU_BUILD_BUG_ON
 * add "R:" to MAINTAINERS and get_maintainers
 * checkpatch improvements
 * dump threading fixes
 * first part of vhost-user-scsi support
 * QemuMutex tracing
 * vmw_pvscsi and megasas fixes
 * sgabios module update
 * use Rev3 (ACPI 2.0) FADT
 * deprecate -hdachs
 * improve -accel documentation
 * hax fix
 * qemu-char GSource bugfix
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
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 0E4hQrBr0qjes8n8+9WGGQW2k8Ak0QlDvrZnQ97hTeV1k6SxW+2ATO2mLeJp9TM=
 =5hf2
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'bonzini/tags/for-upstream' into staging

A large set of small patches.  I have not included yet vhost-user-scsi,
but it'll come in the next pull request.

* use GDB XML register description for x86
* use _Static_assert in QEMU_BUILD_BUG_ON
* add "R:" to MAINTAINERS and get_maintainers
* checkpatch improvements
* dump threading fixes
* first part of vhost-user-scsi support
* QemuMutex tracing
* vmw_pvscsi and megasas fixes
* sgabios module update
* use Rev3 (ACPI 2.0) FADT
* deprecate -hdachs
* improve -accel documentation
* hax fix
* qemu-char GSource bugfix

# gpg: Signature made Fri 05 May 2017 06:10:40 AM EDT
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* bonzini/tags/for-upstream: (21 commits)
  vhost-scsi: create a vhost-scsi-common abstraction
  libvhost-user: replace vasprintf() to fix build
  get_maintainer: add subsystem to reviewer output
  get_maintainer: --r (list reviewer) is on by default
  get_maintainer: it's '--pattern-depth', not '-pattern-depth'
  get_maintainer: Teach get_maintainer.pl about the new "R:" tag
  MAINTAINERS: Add "R:" tag for self-appointed reviewers
  Fix the -accel parameter and the documentation for 'hax'
  dump: Acquire BQL around vm_start() in dump thread
  hax: Fix memory mapping de-duplication logic
  checkpatch: Disallow glib asserts in main code
  trace: add qemu mutex lock and unlock trace events
  vmw_pvscsi: check message ring page count at initialisation
  sgabios: update for "fix wrong video attrs for int 10h,ah==13h"
  scsi: avoid an off-by-one error in megasas_mmio_write
  vl: deprecate the "-hdachs" option
  use _Static_assert in QEMU_BUILD_BUG_ON
  target/i386: Add GDB XML register description support
  char: Fix removing wrong GSource that be found by fd_in_tag
  hw/i386: Build-time assertion on pc/q35 reset register being identical.
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-08 13:29:40 -04:00
Saurav Sachidanand
ec45bbe5f1 util: Use g_malloc/g_free in envlist.c
Change malloc/strdup/free to g_malloc/g_strdup/g_free in
util/envlist.c.

Remove NULL checks for pointers returned from g_malloc and g_strdup
as they exit in case of failure. Also, update calls to envlist_create
to reflect this.

Free array and array contents returned by envlist_to_environ using
g_free in bsd-user/main.c and linux-user/main.c.

Update comments to reflect change in semantics.

Signed-off-by: Saurav Sachidanand <sauravsachidanand@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-05-07 09:57:51 +03:00
Stefan Hajnoczi
4f225f343a More s390x patches, this time boot related:
- LOADPARM machine property, exposed to the guest via SCLP and
   diagnose 308
 - Use LOADPARM in the s390-ccw bios to select a boot entry
 - Fix a crash in the ipl device code when a virtio-scsi-pci device
   has been specified
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
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Merge remote-tracking branch 'cohuck/tags/s390x-20170502' into staging

More s390x patches, this time boot related:
- LOADPARM machine property, exposed to the guest via SCLP and
  diagnose 308
- Use LOADPARM in the s390-ccw bios to select a boot entry
- Fix a crash in the ipl device code when a virtio-scsi-pci device
  has been specified

# gpg: Signature made Tue 02 May 2017 02:29:26 PM BST
# gpg:                using RSA key 0xDECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* cohuck/tags/s390x-20170502:
  hw/s390x/ipl: Fix crash with virtio-scsi-pci device
  pc-bios/s390-ccw.img: update image
  pc-bios/s390-ccw: add boot entry selection to El Torito routine
  pc-bios/s390-ccw: add boot entry selection for ECKD DASD
  pc-bios/s390-ccw: provide entry selection on LOADPARM for SCSI disk
  pc-bios/s390-ccw: provide a function to interpret LOADPARM value
  pc-bios/s390-ccw: get LOADPARM stored in SCP Read Info
  pc-bios/s390-ccw: Make ebcdic/ascii conversion public
  util/qemu-config: Add loadparm to qemu machine_opts
  hw/s390x/sclp: update LOADPARM in SCP Info
  hw/s390x/ipl: enable LOADPARM in IPIB for a boot device
  hw/s390x: provide loadparm property for the machine

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-05-05 16:00:03 +01:00
Jose Ricardo Ziviani
31f5a726b5 trace: add qemu mutex lock and unlock trace events
These trace events were very useful to help me to understand and find a
reordering issue in vfio, for example:

qemu_mutex_lock locked mutex 0x10905ad8
  vfio_region_write  (0001:03:00.0:region1+0xc0, 0x2020c, 4)
qemu_mutex_unlock unlocked mutex 0x10905ad8
qemu_mutex_lock locked mutex 0x10905ad8
  vfio_region_write  (0001:03:00.0:region1+0xc4, 0xa0000, 4)
qemu_mutex_unlock unlocked mutex 0x10905ad8

that also helped me to see the desired result after the fix:

qemu_mutex_lock locked mutex 0x10905ad8
  vfio_region_write  (0001:03:00.0:region1+0xc0, 0x2000c, 4)
  vfio_region_write  (0001:03:00.0:region1+0xc4, 0xb0000, 4)
qemu_mutex_unlock unlocked mutex 0x10905ad8

So it could be a good idea to have these traces implemented. It's worth
mentioning that they should be surgically enabled during the debugging,
otherwise it can flood the trace logs with lock/unlock messages.

How to use it:
trace-event qemu_mutex_lock on|off
trace-event qemu_mutex_unlock on|off
or
trace-event qemu_mutex* on|off

Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Message-Id: <1493054398-26013-1-git-send-email-joserz@linux.vnet.ibm.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
[Also handle trylock, cond_wait and win32; trace "unlocked" while still
 in the critical section, so that "unlocked" always comes before the
 next "locked" tracepoint. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-05-05 12:09:59 +02:00
Farhan Ali
5559716c98 util/qemu-config: Add loadparm to qemu machine_opts
Add S390CcwMachineState machine parameter "loadparm" to qemu machine_opts so
libvirt can query for it.

Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02 15:08:54 +02:00
Max Reitz
262fbae692 progress: Show current progress on SIGINFO
Currently we only print progress information on retrieval of SIGUSR1.
Some systems have a dedicated SIGINFO for this, however, so it should be
handled appropriately if it is available.

Buglink: https://bugs.launchpad.net/qemu/+bug/1662468
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170207235757.2026-1-mreitz@redhat.com
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-28 18:48:11 +02:00
Peter Maydell
eab1e53cac fix display update races, part one.
add xres + yres properties to qxl and virtio.
 misc fixes and cleanups.
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 Version: GnuPG v2.0.22 (GNU/Linux)
 
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Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20170424-1' into staging

fix display update races, part one.
add xres + yres properties to qxl and virtio.
misc fixes and cleanups.

# gpg: Signature made Mon 24 Apr 2017 13:14:49 BST
# gpg:                using RSA key 0x4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/pull-vga-20170424-1:
  virtio-gpu: add xres and yres properties
  qxl: add xres and yres properties
  vmsvga: fix vmsvga_update_display
  g364fb: make display updates thread safe
  exynos: make display updates thread safe
  framebuffer: make display updates thread safe
  vga: make display updates thread safe.
  vga: add vga_scanline_invalidated helper
  memory: add support getting and using a dirty bitmap copy.
  bitmap: add bitmap_copy_and_clear_atomic
  virtio-gpu: replace PIXMAN_* by PIXMAN_BE_*
  console: add same displaychangelistener registration pre-condition
  console: add same surface replace pre-condition

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-24 15:37:30 +01:00
Gerd Hoffmann
d6eb141392 bitmap: add bitmap_copy_and_clear_atomic
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170421091632.30900-2-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-04-24 10:12:28 +02:00
Fam Zheng
1a9a7f25a0 socket: Make errp the last parameter of vsock_connect_saddr
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170421122710.15373-5-famz@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24 09:12:59 +02:00
Fam Zheng
2bdc6791b9 socket: Make errp the last parameter of unix_connect_saddr
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170421122710.15373-4-famz@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24 09:12:59 +02:00
Fam Zheng
6dffc1f670 socket: Make errp the last parameter of inet_connect_saddr
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170421122710.15373-3-famz@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24 09:12:59 +02:00
Fam Zheng
226799cec5 socket: Make errp the last parameter of socket_connect
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170421122710.15373-2-famz@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24 09:12:59 +02:00
Max Reitz
536eeea869 util/error: Fix leak in error_vprepend()
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20170413160952.29918-1-mreitz@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24 09:12:59 +02:00
Stefan Hajnoczi
d72915c60b throttle: make throttle_config(throttle_get_config()) symmetric
Throttling has a weird property that throttle_get_config() does not
always return the same throttling settings that were given with
throttle_config().  In other words, the set and get functions aren't
symmetric.

If .max is 0 then the throttling code assigns a default value of .avg /
10 in throttle_config().  This is an implementation detail of the
throttling algorithm.  When throttle_get_config() is called the .max
value returned should still be 0.

Users are exposed to this quirk via "info block" or "query-block"
monitor commands.  This has caused confusion because it looks like a bug
when an unexpected value is reported.

This patch hides the .max value adjustment in throttle_get_config() and
updates test-throttle.c appropriately.

Reported-by: Nini Gu <ngu@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20170301115026.22621-4-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-04-21 10:36:12 +01:00
Fam Zheng
8865852e00 async: Introduce aio_co_enter
They start the coroutine on the specified context.

Signed-off-by: Fam Zheng <famz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-04-11 20:07:15 +08:00
Fam Zheng
ba9e75ceef coroutine: Extract qemu_aio_coroutine_enter
It's a variant of qemu_coroutine_enter with an explicit AioContext
parameter.

Signed-off-by: Fam Zheng <famz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-04-11 20:07:15 +08:00
Peter Maydell
87cc4c6102 * MemoryRegionCache revert
* glib optimization workaround
 * fix "info lapic" segfault on isapc
 * fix QIOChannel memory leak
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* MemoryRegionCache revert
* glib optimization workaround
* fix "info lapic" segfault on isapc
* fix QIOChannel memory leak

# gpg: Signature made Mon 03 Apr 2017 18:17:00 BST
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream:
  main-loop: Acquire main_context lock around os_host_main_loop_wait.
  exec: revert MemoryRegionCache
  nbd: fix memory leak on socket_connect failed
  ipmi: Fix macro issues
  target-i386: fix "info lapic" segfault on isapc
  iscsi: drop unused IscsiAIOCB.qiov field

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-04 11:40:55 +01:00
Richard W.M. Jones
ecbddbb106 main-loop: Acquire main_context lock around os_host_main_loop_wait.
When running virt-rescue the serial console hangs from time to time.
Virt-rescue runs an ordinary Linux kernel "appliance", but there is
only a single idle process running inside, so the qemu main loop is
largely idle.  With virt-rescue >= 1.37 you may be able to observe the
hang by doing:

  $ virt-rescue -e ^] --scratch
  ><rescue> while true; do ls -l /usr/bin; done

The hang in virt-rescue can be resolved by pressing a key on the
serial console.

Possibly with the same root cause, we also observed hangs during very
early boot of regular Linux VMs with a serial console.  Those hangs
are extremely rare, but you may be able to observe them by running
this command on baremetal for a sufficiently long time:

  $ while libguestfs-test-tool -t 60 >& /tmp/log ; do echo -n . ; done

(Check in /tmp/log that the failure was caused by a hang during early
boot, and not some other reason)

During investigation of this bug, Paolo Bonzini wrote:

> glib is expecting QEMU to use g_main_context_acquire around accesses to
> GMainContext.  However QEMU is not doing that, instead it is taking its
> own mutex.  So we should add g_main_context_acquire and
> g_main_context_release in the two implementations of
> os_host_main_loop_wait; these should undo the effect of Frediano's
> glib patch.

This patch exactly implements Paolo's suggestion in that paragraph.

This fixes the serial console hang in my testing, across 3 different
physical machines (AMD, Intel Core i7 and Intel Xeon), over many hours
of automated testing.  I wasn't able to reproduce the early boot hangs
(but as noted above, these are extremely rare in any case).

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1435432
Reported-by: Richard W.M. Jones <rjones@redhat.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Message-Id: <20170331205133.23906-1-rjones@redhat.com>
[Paolo: this is actually a glib bug: recent glib versions are also
expecting g_main_context_acquire around g_poll---but that is not
documented and probably not even intended].
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-04-03 19:13:12 +02:00
Markus Armbruster
216411b839 sockets: New helper socket_address_crumple()
SocketAddress is a simple union, and simple unions are awkward: they
have their variant members wrapped in a "data" object on the wire, and
require additional indirections in C.  I intend to limit its use to
existing external interfaces.  New ones should use SocketAddressFlat.
I further intend to convert all internal interfaces to
SocketAddressFlat.  This helper should go away then.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1490895797-29094-8-git-send-email-armbru@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-03 17:11:39 +02:00
Markus Armbruster
a6c76285f2 io vnc sockets: Clean up SocketAddressKind switches
We have quite a few switches over SocketAddressKind.  Some have case
labels for all enumeration values, others rely on a default label.
Some abort when the value isn't a valid SocketAddressKind, others
report an error then.

Unify as follows.  Always provide case labels for all enumeration
values, to clarify intent.  Abort when the value isn't a valid
SocketAddressKind, because the program state is messed up then.

Improve a few error messages while there.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1490895797-29094-4-git-send-email-armbru@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-03 17:11:39 +02:00
Markus Armbruster
ca0b64e5ed nbd sockets vnc: Mark problematic address family tests TODO
Certain features make sense only with certain address families.  For
instance, passing file descriptors requires AF_UNIX.  Testing
SocketAddress's saddr->type == SOCKET_ADDRESS_KIND_UNIX is obvious,
but problematic: it can't recognize AF_UNIX when type ==
SOCKET_ADDRESS_KIND_FD.

Mark such tests of saddr->type TODO.  We may want to check the address
family with getsockname() there.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1490895797-29094-2-git-send-email-armbru@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-03 17:11:39 +02:00
Halil Pasic
aa26292859 event_notifier: prevent accidental use after close
Let's set the handles to the underlying facilities to their extremal
value so no accidental misuse can happen, and to make it obvious that the
notifier is dysfunctional. E.g. if we just close an fd but do not touch
the int holding the fd eventually a read/write could succeed again when
the fd gets reused, and corrupt the file addressed by the fd.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-29 02:35:23 +03:00
Markus Armbruster
44fdc76455 sockets: Fix socket_address_to_string() hostname truncation
We first snprintf() to a fixed buffer, then g_strdup() the result
*boggle*.

Worse, the size of the fixed buffer INET6_ADDRSTRLEN + 5 + 4 is bogus:
the 4 correctly accounts for '[', ']', ':' and '\0', but
INET6_ADDRSTRLEN is not a suitable limit for inet->host, and 5 is not
one for inet->port!  They are for host and port in *numeric* form
(exploiting that INET6_ADDRSTRLEN > INET_ADDRSTRLEN), but inet->host
can also be a hostname, and inet->port can be a service name, to be
resolved with getaddrinfo().

Fortunately, the only user so far is the "socket" network backend's
net_socket_connected(), which uses it to initialize a NetSocketState's
info_str[].  info_str[] has considerable more space: 256 instead of
55.  So the bug's impact appears to be limited to truncated "info
networks" with the "socket" network backend.

The fix is obvious: use g_strdup_printf().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1490268208-23368-1-git-send-email-armbru@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-28 18:50:38 +02:00
Andrey Shedel
12f8def0e0 win32: replace custom mutex and condition variable with native primitives
The multithreaded TCG implementation exposed deadlocks in the win32
condition variables: as implemented, qemu_cond_broadcast waited on
receivers, whereas the pthreads API it was intended to emulate does
not. This was causing a deadlock because broadcast was called while
holding the IO lock, as well as all possible waiters blocked on the
same lock.

This patch replaces all the custom synchronisation code for mutexes
and condition variables with native Windows primitives (SRWlocks and
condition variables) with the same semantics as their POSIX
equivalents. To enable that, it requires a Windows Vista or newer host
OS.

Signed-off-by: Andrey Shedel <ashedel@microsoft.com>
[AB: edited commit message]
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-Id: <20170324220141.10104-1-Andrew.Baumann@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-27 14:41:01 +02:00
Jitendra Kolhe
dfd0dcc717 mem-prealloc: fix sysconf(_SC_NPROCESSORS_ONLN) failure case.
This was spotted by Coverity, in case where sysconf(_SC_NPROCESSORS_ONLN)
fails and returns -1. This results in memset_num_threads getting set to -1.
Which we then pass to g_new0().
The patch replaces MAX_MEM_PREALLOC_THREAD_COUNT macro with a function call
get_memset_num_threads() to handle sysconf() failure gracefully. In case
sysconf() fails, we fall back to single threaded.

(Spotted by Coverity, CID 1372465.)

Signed-off-by: Jitendra Kolhe <jitendra.kolhe@hpe.com>
Message-Id: <1490079006-32495-1-git-send-email-jitendra.kolhe@hpe.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-24 11:50:11 +01:00
Markus Armbruster
0ee9ae7c8c keyval: Document issues with 'any' and alternate types
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1490014548-15083-5-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-21 10:42:09 +01:00
Markus Armbruster
fae425d74f keyval: Improve some comments
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1490014548-15083-3-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-21 10:41:54 +01:00
Paolo Bonzini
53fabd4b86 qemu-ga: obey LISTEN_PID when using systemd socket activation
qemu-ga's socket activation support was not obeying the LISTEN_PID
environment variable, which avoids that a process uses a socket-activation
file descriptor meant for its parent.

Mess can for example ensue if a process forks a children before consuming
the socket-activation file descriptor and therefore setting O_CLOEXEC
on it.

Luckily, qemu-nbd also got socket activation code, and its copy does
support LISTEN_PID.  Some extra fixups are needed to ensure that the
code can be used for both, but that's what this patch does.  The
main change is to replace get_listen_fds's "consume" argument with
the FIRST_SOCKET_ACTIVATION_FD macro from the qemu-nbd code.

Cc: "Richard W.M. Jones" <rjones@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-19 11:12:12 +01:00
Paolo Bonzini
6b3cca76dd oslib-posix: fix compilation on OpenBSD
si_band is not found in OpenBSD.   It is marked as obsolescent in
POSIX, so we can delete it without any remorse.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20170317152214.6148-1-pbonzini@redhat.com
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-17 18:27:49 +00:00
Peter Lieven
b7a745dc33 thread-pool: add missing qemu_bh_cancel in completion function
commit 3c80ca15 fixed a deadlock scenarion with nested aio_poll invocations.

However, the rescheduling of the completion BH introcuded unnecessary spinning
in the main-loop. On very fast file backends this can even lead to the
"WARNING: I/O thread spun for 1000 iterations" message popping up.

Callgrind reports about 3-4% less instructions with this patch running
qemu-img bench on a ramdisk based VMDK file.

Fixes: 3c80ca158c
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-03-17 12:54:21 +01:00
Daniel P. Berrange
9dc44aa582 os: don't corrupt pre-existing memory-backend data with prealloc
When using a memory-backend object with prealloc turned on, QEMU
will memset() the first byte in every memory page to zero. While
this might have been acceptable for memory backends associated
with RAM, this corrupts application data for NVDIMMs.

Instead of setting every page to zero, read the current byte
value and then just write that same value back, so we are not
corrupting the original data. Directly write the value instead
of memset()ing it, since there's no benefit to memset for a
single byte write.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Message-id: 20170303113255.28262-1-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-03-15 11:55:41 +08:00
Paolo Bonzini
6b8f0187a4 icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread
icount has become much slower after tcg_cpu_exec has stopped
using the BQL.  There is also a latent bug that is masked by
the slowness.

The slowness happens because every occurrence of a QEMU_CLOCK_VIRTUAL
timer now has to wake up the I/O thread and wait for it.  The rendez-vous
is mediated by the BQL QemuMutex:

- handle_icount_deadline wakes up the I/O thread with BQL taken
- the I/O thread wakes up and waits on the BQL
- the VCPU thread releases the BQL a little later
- the I/O thread raises an interrupt, which calls qemu_cpu_kick
- the VCPU thread notices the interrupt, takes the BQL to
  process it and waits on it

All this back and forth is extremely expensive, causing a 6 to 8-fold
slowdown when icount is turned on.

One may think that the issue is that the VCPU thread is too dependent
on the BQL, but then the latent bug comes in.  I first tried removing
the BQL completely from the x86 cpu_exec, only to see everything break.
The only way to fix it (and make everything slow again) was to add a dummy
BQL lock/unlock pair.

This is because in -icount mode you really have to process the events
before the CPU restarts executing the next instruction.  Therefore, this
series moves the processing of QEMU_CLOCK_VIRTUAL timers straight in
the vCPU thread when running in icount mode.

The required changes include:

- make the timer notification callback wake up TCG's single vCPU thread
  when run from another thread.  By using async_run_on_cpu, the callback
  can override all_cpu_threads_idle() when the CPU is halted.

- move handle_icount_deadline after qemu_tcg_wait_io_event, so that
  the timer notification callback is invoked after the dummy work item
  wakes up the vCPU thread

- make handle_icount_deadline run the timers instead of just waking the
  I/O thread.

- stop processing the timers in the main loop

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:51:34 +01:00
Paolo Bonzini
3f53bc61a4 cpus: define QEMUTimerListNotifyCB for QEMU system emulation
There is no change for now, because the callback just invokes
qemu_notify_event.

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:28:29 +01:00
Paolo Bonzini
d2528bdc19 qemu-timer: do not include sysemu/cpus.h from util/qemu-timer.h
This dependency is the wrong way, and we will need util/qemu-timer.h from
sysemu/cpus.h in the next patch.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:28:18 +01:00
Paolo Bonzini
33bef0b994 qemu-timer: fix off-by-one
If the first timer is exactly at the current value of the clock, the
deadline is met and the timer should fire.  This fixes itself on the next
iteration of the loop without icount; with icount, however, execution
of instructions will stop exactly at the deadline and won't proceed.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:42 +01:00
Suramya Shah
bd5d983fa8 util: Removed unneeded header from path.c
Signed-off-by: Suramya Shah <shah.suramya@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170310163948.7567-1-shah.suramya@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:37 +01:00
Jitendra Kolhe
1e356fc14b mem-prealloc: reduce large guest start-up and migration time.
Using "-mem-prealloc" option for a large guest leads to higher guest
start-up and migration time. This is because with "-mem-prealloc" option
qemu tries to map every guest page (create address translations), and
make sure the pages are available during runtime. virsh/libvirt by
default, seems to use "-mem-prealloc" option in case the guest is
configured to use huge pages. The patch tries to map all guest pages
simultaneously by spawning multiple threads. Currently limiting the
change to QEMU library functions on POSIX compliant host only, as we are
not sure if the problem exists on win32. Below are some stats with
"-mem-prealloc" option for guest configured to use huge pages.

------------------------------------------------------------------------
Idle Guest      | Start-up time | Migration time
------------------------------------------------------------------------
Guest stats with 2M HugePage usage - single threaded (existing code)
------------------------------------------------------------------------
64 Core - 4TB   | 54m11.796s    | 75m43.843s
64 Core - 1TB   | 8m56.576s     | 14m29.049s
64 Core - 256GB | 2m11.245s     | 3m26.598s
------------------------------------------------------------------------
Guest stats with 2M HugePage usage - map guest pages using 8 threads
------------------------------------------------------------------------
64 Core - 4TB   | 5m1.027s      | 34m10.565s
64 Core - 1TB   | 1m10.366s     | 8m28.188s
64 Core - 256GB | 0m19.040s     | 2m10.148s
-----------------------------------------------------------------------
Guest stats with 2M HugePage usage - map guest pages using 16 threads
-----------------------------------------------------------------------
64 Core - 4TB   | 1m58.970s     | 31m43.400s
64 Core - 1TB   | 0m39.885s     | 7m55.289s
64 Core - 256GB | 0m11.960s     | 2m0.135s
-----------------------------------------------------------------------

Changed in v2:
 - modify number of memset threads spawned to min(smp_cpus, 16).
 - removed 64GB memory restriction for spawning memset threads.

Changed in v3:
 - limit number of threads spawned based on
   min(sysconf(_SC_NPROCESSORS_ONLN), 16, smp_cpus)
 - implement memset thread specific siglongjmp in SIGBUS signal_handler.

Changed in v4
 - remove sigsetjmp/siglongjmp and SIGBUS unblock/block for main thread
   as main thread no longer touches any pages.
 - simplify code my returning memset_thread_failed status from
   touch_all_pages.

Signed-off-by: Jitendra Kolhe <jitendra.kolhe@hpe.com>
Message-Id: <1487907103-32350-1-git-send-email-jitendra.kolhe@hpe.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Markus Armbruster
0b2c1beea4 keyval: Support lists
Additionally permit non-negative integers as key components.  A
dictionary's keys must either be all integers or none.  If all keys
are integers, convert the dictionary to a list.  The set of keys must
be [0,N].

Examples:

* list.1=goner,list.0=null,list.1=eins,list.2=zwei
  is equivalent to JSON [ "null", "eins", "zwei" ]

* a.b.c=1,a.b.0=2
  is inconsistent: a.b.c clashes with a.b.0

* list.0=null,list.2=eins,list.2=zwei
  has a hole: list.1 is missing

Similar design flaw as for objects: there is no way to denote an empty
list.  While interpreting "key absent" as empty list seems natural
(removing a list member from the input string works when there are
multiple ones, so why not when there's just one), it doesn't work:
"key absent" already means "optional list absent", which isn't the
same as "empty list present".

Update the keyval object visitor to use this a.0 syntax in error
messages rather than the usual a[0].

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1488317230-26248-25-git-send-email-armbru@redhat.com>
[Off-by-one fix squashed in, as per Kevin's review]
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-03-07 16:07:48 +01:00
Markus Armbruster
f740048323 keyval: Restrict key components to valid QAPI names
Until now, key components are separated by '.'.  This leaves little
room for evolving the syntax, and is incompatible with the __RFQDN_
prefix convention for downstream extensions.

Since key components will be commonly used as QAPI member names by the
QObject input visitor, we can just as well borrow the QAPI naming
rules here: letters, digits, hyphen and period starting with a letter,
with an optional __RFQDN_ prefix for downstream extensions.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <1488317230-26248-20-git-send-email-armbru@redhat.com>
2017-03-07 16:07:47 +01:00
Markus Armbruster
d454dbe0ee keyval: New keyval_parse()
keyval_parse() parses KEY=VALUE,... into a QDict.  Works like
qemu_opts_parse(), except:

* Returns a QDict instead of a QemuOpts (d'oh).

* Supports nesting, unlike QemuOpts: a KEY is split into key
  fragments at '.' (dotted key convention; the block layer does
  something similar on top of QemuOpts).  The key fragments are QDict
  keys, and the last one's value is updated to VALUE.

* Each key fragment may be up to 127 bytes long.  qemu_opts_parse()
  limits the entire key to 127 bytes.

* Overlong key fragments are rejected.  qemu_opts_parse() silently
  truncates them.

* Empty key fragments are rejected.  qemu_opts_parse() happily
  accepts empty keys.

* It does not store the returned value.  qemu_opts_parse() stores it
  in the QemuOptsList.

* It does not treat parameter "id" specially.  qemu_opts_parse()
  ignores all but the first "id", and fails when its value isn't
  id_wellformed(), or duplicate (a QemuOpts with the same ID is
  already stored).  It also screws up when a value contains ",id=".

* Implied value is not supported.  qemu_opts_parse() desugars "foo" to
  "foo=on", and "nofoo" to "foo=off".

* An implied key's value can't be empty, and can't contain ','.

I intend to grow this into a saner replacement for QemuOpts.  It'll
take time, though.

Note: keyval_parse() provides no way to do lists, and its key syntax
is incompatible with the __RFQDN_ prefix convention for downstream
extensions, because it blindly splits at '.', even in __RFQDN_.  Both
issues will be addressed later in the series.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1488317230-26248-4-git-send-email-armbru@redhat.com>
2017-03-07 16:07:46 +01:00
Peter Maydell
17783ac828 ppc patch queuye for 2017-03-03
This will probably be my last pull request before the hard freeze.  It
 has some new work, but that has all been posted in draft before the
 soft freeze, so I think it's reasonable to include in qemu-2.9.
 
 This batch has:
     * A substantial amount of POWER9 work
         * Implements the legacy (hash) MMU for POWER9
 	* Some more preliminaries for implementing the POWER9 radix
           MMU
 	* POWER9 has_work
 	* Basic POWER9 compatibility mode handling
 	* Removal of some premature tests
     * Some cleanups and fixes to the existing MMU code to make the
       POWER9 work simpler
     * A bugfix for TCG multiply adds on power
     * Allow pseries guests to access PCIe extended config space
 
 This also includes a code-motion not strictly in ppc code - moving
 getrampagesize() from ppc code to exec.c.  This will make some future
 VFIO improvements easier, Paolo said it was ok to merge via my tree.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.9-20170303' into staging

ppc patch queuye for 2017-03-03

This will probably be my last pull request before the hard freeze.  It
has some new work, but that has all been posted in draft before the
soft freeze, so I think it's reasonable to include in qemu-2.9.

This batch has:
    * A substantial amount of POWER9 work
        * Implements the legacy (hash) MMU for POWER9
	* Some more preliminaries for implementing the POWER9 radix
          MMU
	* POWER9 has_work
	* Basic POWER9 compatibility mode handling
	* Removal of some premature tests
    * Some cleanups and fixes to the existing MMU code to make the
      POWER9 work simpler
    * A bugfix for TCG multiply adds on power
    * Allow pseries guests to access PCIe extended config space

This also includes a code-motion not strictly in ppc code - moving
getrampagesize() from ppc code to exec.c.  This will make some future
VFIO improvements easier, Paolo said it was ok to merge via my tree.

# gpg: Signature made Fri 03 Mar 2017 03:20:36 GMT
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.9-20170303:
  target/ppc: rewrite f[n]m[add,sub] using float64_muladd
  spapr: Small cleanup of PPC MMU enums
  spapr_pci: Advertise access to PCIe extended config space
  target/ppc: Rework hash mmu page fault code and add defines for clarity
  target/ppc: Move no-execute and guarded page checking into new function
  target/ppc: Add execute permission checking to access authority check
  target/ppc: Add Instruction Authority Mask Register Check
  hw/ppc/spapr: Add POWER9 to pseries cpu models
  target/ppc/POWER9: Add cpu_has_work function for POWER9
  target/ppc/POWER9: Add POWER9 pa-features definition
  target/ppc/POWER9: Add POWER9 mmu fault handler
  target/ppc: Don't gen an SDR1 on POWER9 and rework register creation
  target/ppc: Add patb_entry to sPAPRMachineState
  target/ppc/POWER9: Add POWERPC_MMU_V3 bit
  powernv: Don't test POWER9 CPU yet
  exec, kvm, target-ppc: Move getrampagesize() to common code
  target/ppc: Add POWER9/ISAv3.00 to compat_table

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-04 16:31:14 +00:00
Paolo Bonzini
d98d407234 cpus: remove ugly cast on sigbus_handler
The cast is there because sigbus_handler is invoked via sigfd_handler.
But it feels just wrong to use struct qemu_signalfd_siginfo in the
prototype of a function that is passed to sigaction.

Instead, do a simple-minded conversion of qemu_signalfd_siginfo to
siginfo_t.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-03 16:40:02 +01:00
Alexey Kardashevskiy
9c60766887 exec, kvm, target-ppc: Move getrampagesize() to common code
getrampagesize() returns the largest supported page size and mainly
used to know if huge pages are enabled.

However is implemented in target-ppc/kvm.c and not available
in TCG or other architectures.

This renames and moves gethugepagesize() to mmap-alloc.c where
fd-based analog of it is already implemented. This renames and moves
getrampagesize() to exec.c as it seems to be the common place for
helpers like this.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2017-03-03 11:30:59 +11:00
Peter Maydell
c9fc677a35 -----BEGIN PGP SIGNATURE-----
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 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/elmarco/tags/leak-pull-request' into staging

# gpg: Signature made Wed 01 Mar 2017 09:02:53 GMT
# gpg:                using RSA key 0xDAE8E10975969CE5
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>"
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* remotes/elmarco/tags/leak-pull-request: (28 commits)
  tests: fix virtio-blk-test leaks
  tests: add specialized device_find function
  tests: fix usb-test leaks
  tests: allows to run single test in usb-hcd-ehci-test
  usb: release the created buses
  bus: do not unref hotplug handler
  tests: fix virtio-9p-test leaks
  tests: fix virtio-scsi-test leak
  tests: fix e1000e leaks
  tests: fix i440fx-test leaks
  tests: fix e1000-test leak
  tests: fix tco-test leaks
  tests: fix eepro100-test leak
  pc: pcihp: avoid adding ACPI_PCIHP_PROP_BSEL twice
  tests: fix ipmi-bt-test leak
  tests: fix ipmi-kcs-test leak
  tests: fix bios-tables-test leak
  tests: fix hd-geo-test leaks
  tests: fix ide-test leaks
  tests: fix vhost-user-test leaks
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-02 15:25:37 +00:00
Marc-André Lureau
e703dcbaee timer: use an inline function for free
Similarly to allocation, do it from an inline function. This allows
tests to only use the headers for allocation/free of timer.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-01 00:09:28 +04:00
Markus Armbruster
9e19ad4e49 option: Tweak invalid size error message and unbreak iotest 049
Commit 75cdcd1 neglected to update tests/qemu-iotests/049.out, and
made the error message for negative size worse.  Fix that.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-02-28 20:40:31 +01:00
Markus Armbruster
75cdcd1553 option: Fix checking of sizes for overflow and trailing crap
parse_option_size()'s checking for overflow and trailing crap is
wrong.  Has always been that way.  qemu_strtosz() gets it right, so
use that.

This adds support for size suffixes 'P', 'E', and ignores case for all
suffixes, not just 'k'.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-25-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
f46bfdbfc8 util/cutils: Change qemu_strtosz*() from int64_t to uint64_t
This will permit its use in parse_option_size().

Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86)
Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core)
Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core)
Cc: qemu-block@nongnu.org (open list:Block layer core)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1487708048-2131-24-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
f17fd4fdf0 util/cutils: Return qemu_strtosz*() error and value separately
This makes qemu_strtosz(), qemu_strtosz_mebi() and
qemu_strtosz_metric() similar to qemu_strtoi64(), except negative
values are rejected.

Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86)
Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core)
Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core)
Cc: qemu-block@nongnu.org (open list:Block layer core)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1487708048-2131-23-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
4fcdf65ae2 util/cutils: Let qemu_strtosz*() optionally reject trailing crap
Change the qemu_strtosz() & friends to return -EINVAL when @endptr is
null and the conversion doesn't consume the string completely.
Matches how qemu_strtol() & friends work.

Only test_qemu_strtosz_simple() passes a null @endptr.  No functional
change there, because its conversion consumes the string.

Simplify callers that use @endptr only to fail when it doesn't point
to '\0' to pass a null @endptr instead.

Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86)
Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core)
Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core)
Cc: qemu-block@nongnu.org (open list:Block layer core)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1487708048-2131-22-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
17f942560e util/cutils: Drop QEMU_STRTOSZ_DEFSUFFIX_* macros
Writing QEMU_STRTOSZ_DEFSUFFIX_* instead of '*' gains nothing.  Get
rid of these eyesores.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <1487708048-2131-18-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
466dea14e6 util/cutils: New qemu_strtosz()
Most callers of qemu_strtosz_suffix() pass QEMU_STRTOSZ_DEFSUFFIX_B.
Capture the pattern in new qemu_strtosz().

Inline qemu_strtosz_suffix() into its only remaining caller.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-17-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
e591591b32 util/cutils: Rename qemu_strtosz() to qemu_strtosz_MiB()
With qemu_strtosz(), no suffix means mebibytes.  It's used rarely.
I'm going to add a similar function where no suffix means bytes.
Rename qemu_strtosz() to qemu_strtosz_MiB() to make the name
qemu_strtosz() available for the new function.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-16-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
d2734d2629 util/cutils: New qemu_strtosz_metric()
To parse numbers with metric suffixes, we use

    qemu_strtosz_suffix_unit(nptr, &eptr, QEMU_STRTOSZ_DEFSUFFIX_B, 1000)

Capture this in a new function for legibility:

    qemu_strtosz_metric(nptr, &eptr)

Replace test_qemu_strtosz_suffix_unit() by test_qemu_strtosz_metric().

Rename qemu_strtosz_suffix_unit() to do_strtosz() and give it internal
linkage.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-15-git-send-email-armbru@redhat.com>
2017-02-23 20:35:36 +01:00
Markus Armbruster
3403e5eb88 option: Fix to reject invalid and overflowing numbers
parse_option_number() fails to check for these errors after
strtoull().  Has always been broken.  Fix that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-10-git-send-email-armbru@redhat.com>
2017-02-23 20:35:35 +01:00
Markus Armbruster
4baef2679e util/cutils: Clean up control flow around qemu_strtol() a bit
Reorder check_strtox_error() to make it obvious that we always store
through a non-null @endptr.

Transform

    if (some error) {
        error case ...
        err = value for error case;
    } else {
        normal case ...
        err = value for normal case;
    }
    return err;

to

    if (some error) {
        error case ...
        return value for error case;
    }
    normal case ...
    return value for normal case;

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-9-git-send-email-armbru@redhat.com>
2017-02-23 20:35:35 +01:00
Markus Armbruster
717adf9609 util/cutils: Clean up variable names around qemu_strtol()
Name same things the same, different things differently.

* qemu_strtol()'s parameter @nptr is called @p in
  check_strtox_error().  Rename the latter.

* qemu_strtol()'s parameter @endptr is called @next in
  check_strtox_error().  Rename the latter.

* qemu_strtol()'s variable @p is called @endptr in
  check_strtox_error().  Rename both to @ep.

* qemu_strtol()'s variable @err is *negative* errno,
  check_strtox_error()'s parameter @err is *positive*.  Rename the
  latter to @libc_errno.

Same for qemu_strtoul(), qemu_strtoi64(), qemu_strtou64(), of course.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-8-git-send-email-armbru@redhat.com>
2017-02-23 20:35:35 +01:00
Markus Armbruster
b30d188677 util/cutils: Rename qemu_strtoll(), qemu_strtoull()
The name qemu_strtoll() suggests conversion to long long, but it
actually converts to int64_t.  Rename to qemu_strtoi64().

The name qemu_strtoull() suggests conversion to unsigned long long,
but it actually converts to uint64_t.  Rename to qemu_strtou64().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <1487708048-2131-7-git-send-email-armbru@redhat.com>
2017-02-23 20:35:35 +01:00
Markus Armbruster
4295f879be util/cutils: Rewrite documentation of qemu_strtol() & friends
Fixes the following documentation bugs:

* Fails to document that null @nptr is safe.

* Fails to document that we return -EINVAL when no conversion could be
  performed (commit 47d4be1).

* Confuses long long with int64_t, and unsigned long long with
  uint64_t.

* Claims the unsigned conversions can underflow.  They can't.

While there, mark problematic assumptions that int64_t is long long,
and uint64_t is unsigned long long with FIXME comments.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <1487708048-2131-6-git-send-email-armbru@redhat.com>
2017-02-23 20:35:35 +01:00