The bdrv_first linked list of BlockDriverStates is currently extern so
that block migration can iterate the list. However, since there is
already a bdrv_iterate() function there is no need to expose bdrv_first.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Assign directly to the bdrv_flags variable instead of using
magic numbers before translating to the BDRV_O_* options.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Returning NULL on error doesn't allow distinguishing between different errors.
Change the interface to return an integer for -errno.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Split up the raw_getlength into separate generic, solaris and BSD
versions to reduce the ifdef maze a bit. The BSD variant still
is a complete maze, but to clean it up properly we'd need some
people using the BSD variants to figure out what code is used
for what variant.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
BDRV_O_FILE is only used to communicate between bdrv_file_open and bdrv_open.
It affects two things: first bdrv_open only searches for protocols using
find_protocol instead of all image formats and host drivers. We can easily
move that to the caller and pass the found driver to bdrv_open. Second
it is used to not force a read-write open of a snapshot file. But we never
use bdrv_file_open to open snapshots and this behaviour doesn't make sense
to start with.
qemu-io abused the BDRV_O_FILE for it's growable option, switch it to
using bdrv_file_open to make sure we only open files as growable were
we can actually support that.
This patch requires Kevin's "[PATCH] Replace calls of old bdrv_open" to
be applied first.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
What is known today as bdrv_open2 becomes the new bdrv_open. All remaining
callers of the old function are converted to the new one. In some places they
even know the right format, so they should have used bdrv_open2 from the
beginning.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
qcow_create2 assumes that the new image will only need one cluster for its
refcount table initially. Obviously that's not true any more when the image is
big enough (exact value depends on the cluster size).
This patch calculates the refcount table size dynamically.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Block drivers can trigger a blkdebug event whenever they reach a place where it
could be useful to inject an error for testing/debugging purposes.
Rules are read from a blkdebug config file and describe which action is taken
when an event is triggered. For now this is only injecting an error (with a few
options) or changing the state (which is an integer). Rules can be declared to
be active only in a specific state; this way later rules can distiguish on
which path we came to trigger their event.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
To be able to use config files for blkdebug, we need to make these functions
available in the tools. This involves moving two functions that can only be
built in the context of the emulator.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add a mechanism to inject errors instead of passing requests on. With no
further patches applied, you can use it by setting inject_errno in gdb.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This isn't doing anything interesting. It creates the blkdebug block driver as
a protocol which just passes everything through to raw.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
qemu_config_parse gets the option groups as a parameter now instead of
hardcoding the VM configuration groups. This way it can be used for other
configurations, too.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Introduce a new function qemu_read_config_file which reads the VM configuration
from a config file. Unlike qemu_config_parse it doesn't take a open file but a
filename and reduces code duplication as a side effect.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Remove unused 'shift' variable spotted by clang.
Also clean up aud_to_sdlfmt which used to get the value
of shift.
Signed-off-by: Serge Ziryukin <ftrvxmtrx@gmail.com>
Signed-off-by: malc <av1474@comtv.ru>
Fix clang error:
CC bt-l2cap.o
/src/qemu/hw/bt-l2cap.c:1000:41: error: if statement has empty body
[-Wempty-body]
/* TODO: Signal an error? */;
This means that l2cap_sframe_in() may now get called.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Andrew Zaborowski <balrogg@gmail.com>
When looking down child bus, it should look parent bridge's
bus number, not child bus's.
Optimized tail recursion and style fix.
Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
A data structure of type sockaddr_in is allocated from stack but not
properly initialized. This may lead to a failure in the bind() call
later on. Fixed by filling the contents of the structure with zeroes
before using it.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This allows limited use of kvm functions (which will return ENOSYS)
even in once-compiled modules. The patch also improves a bit the error
messages for KVM initialization.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[blauwirbel@gmail.com: fixed Win32 build]
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The beginning of the register allocation order list on the TCG arm
target matches the list of clobbered registers. This means that when an
helper is called, there is almost always clobbered registers that have
to be spilled.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
64-bit arguments should be aligned on an even register as specified
by the "Procedure Call Standard for the ARM Architecture".
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
addr_reg, data_reg and data_reg2 can't be register r0 or r1 du to the
constraints. Don't check if they equals these registers.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
On big endian targets, data arguments of qemu_ld/st ops have to be
byte swapped. Two temporary registers are needed for qemu_st to do
the bswap. r0 and r1 are used in system mode, do the same in user
mode, which implies reworking the constraints.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
While it make sense to pass a conditional argument to tcg_out_*()
functions as the ARM architecture allows that, it doesn't make sense
for qemu_ld/st functions. These functions use comparison instructions
and conditional execution already, so it is not possible to use a
second level of conditional execution.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add an bswap16 and bswap32 ops, either using the rev and rev16
instructions on ARMv6+ or shifts and logical operations on previous
ARM versions. In both cases the result use less instructions than
the pure TCG version.
These ops are also needed by the qemu_ld/st functions.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add an ext16u op, either using the uxth instruction on ARMv6+ or two
shifts on previous ARM versions. In both cases the result use the same
number or less instructions than the pure TCG version.
Also move all sign extension code to separate functions, so that they
can be reused in other parts of the code.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Use a set of variables to define the allowed ARM instructions, depending
on the __ARM_ARCH_*__ GCC defines.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The TCG ARM backends uses integer values to refer to both immediate
values and register number. This makes the code difficult to read.
The patch below replaces all (if I haven't miss any ;-) integer values
representing register number by TCG_REG_* enum values.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Instead of writing very compact code, declare all registers that are
clobbered or reserved one by one. This makes the code easier to read.
Also declare all the 16 registers to TCG, and mark pc as reserved.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
There is no need to save the LR register (r14) before a call to a
subroutine. According to the "Procedure Call Standard for the ARM
Architecture", it is the job of the callee to save this register.
Moreover, this register is already saved in the prologue/epilogue.
This patch removes the disabled SAVE_LR code, as there is no need to
reenable later.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
When qemu is invoked with an invalid initrd file, it crashes. Following
patch prints a error message and exits if an invalid initrd is
specified. Includes changes suggested by JV.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Trivial, as it never fails, doesn't have output nor return
any data.
Note that it's also available under QMP, as kvm-autotest
needs this.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Some people might think that this event is emitted whenever the
time changes, be more specific.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
virtio_blk_req_complete frees the request, so we can't access it any more when
calling bdrv_mon_event. Use the pointer that was copied earlier.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Stefan Hajnoczi
Christoph Hellwig
Kevin Wolf
Serge Ziryukin
Andrzej Zaborowski
Blue Swirl
malc
Isaku Yamahata
Juha Riihimäki
Paolo Bonzini
Aurelien Jarno
M. Mohan Kumar
Luiz Capitulino
Markus Armbruster