Ensure that pending requests of a SCSI generic device are purged on
system reset. This also avoids calling a NULL function in lsi53c895a.
The lsi code was recently changed to call the .qdev.reset function.
Signed-off-by: NBernhard Kohl <bernhard.kohl@nsn.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

qcow2 used to use bounce buffers for any AIO requests. This does not only imply
unnecessary copying, but also unbounded allocations which should be avoided.

This patch removes bounce buffers from the normal AIO write path. Encrypted
images continue to use a bounce buffer, however with constant size.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

qcow2 used to use bounce buffers for any AIO requests. This does not only imply
unnecessary copying, but also unbounded allocations which should be avoided.

This patch removes bounce buffers from the normal AIO read path, and constrains
them to a constant size for encrypted images.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

This adds two functions that work on QEMUIOVectors and will be used by the next
qcow2 patches.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

IDE is a bit ugly in this respect.  For one it doesn't really keep track
of a sector size - most of the protocol is in units of 512 bytes, and we
assume 2048 bytes for CDROMs which is correct most of the time.

Second IDE allocates an I/O buffer long before we know if we're dealing
with a CDROM or not, so increase the alignment for the io_buffer
unconditionally.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

We always have a sync for the refcount update when a new cluster is
allocated. If we move this past the COW, we can save an additional sync.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Note that the flush is omitted intentionally in qcow2_free_clusters. If
anything, we can leak clusters here if we lose the writes.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/nbd.c: use default port number when none is specified
qemu-nbd.c:  use IANA-assigned port number: 10809
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

This patch allows to reduce the boot time from an NBD server from 225 seconds to
5 seconds (time between the "boot cd:0" and the kernel init) for the
following command lines:

./qemu-nbd -t ../ISO/debian-500-powerpc-netinst.iso
and
./ppc-softmmu/qemu-system-ppc -cdrom nbd:localhost:1024

This patch combines the reply header and payload send operation.
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Replace the hardcoded handling of 512 byte alignment with bs->buffer_alignment
to handle larger sector size devices correctly.

Note that we can not rely on it to be initialize in bdrv_open, so deal
with the worst case there.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Use qemu_blockalign for all allocations in the block layer.  This allows
increasing the required alignment, which is need to support O_DIRECT on
devices with large block sizes.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

The qcow file used for write support in vvfat is a temporary file,
so we can use cache=unsafe there. Without this, write support is just
too slow to be of any use.
Signed-off-by: NKevin Wolf <mail@kevin-wolf.de>

Allocation and deallocation of bs->opaque is not in the control of a
block driver. Therefore it should not set bs->opaque to a data structure
used by another bs, or closing the image will lead to a double free.
Signed-off-by: NKevin Wolf <mail@kevin-wolf.de>

vvfat tries to set the readonly flag in its open function, but nowadays
this is overwritted with the readonly=... command line option. Check in
bdrv_write if the vvfat was opened read-only and return an error in this
case.

Without this check, vvfat tries to access the qcow bs, which is NULL
without enabled write support.
Signed-off-by: NKevin Wolf <mail@kevin-wolf.de>

The OpenIndiana (Solaris) e1000g driver drops frames that are too long
or too short.  It expects to receive frames of at least the Ethernet
minimum size.  ARP requests in particular are small and will be dropped
if they are not padded appropriately, preventing a Solaris VM from
becoming visible on the network.
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

If the linker supports the flags --dynamicbase, --no-seh,
or --nxcompat, use them.

Tested on Windows Vista: Process Explorer reports that ASLR and DEP
are in use. No effect seen on Wine or Windows XP.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

If the compiler supports the warning flag -Wnested-externs, use it.

Avoid the only warning by moving the declaration of xml_builtin to a
more proper place.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

If the compiler supports the warning flag -Wempty-body, use it.

Adjust the code to avoid the warnings.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

If the compiler supports the following warning flags, use them:

-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers
-Wmissing-include-dirs

Currently, these flags don't produce any warnings.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

If the compiler supports the warning flag -Wtype-limits, use it.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Fix SSSR TFN logic: TX FIFO is never filled, so it is always in
underrun condition if SSP is enabled.

This also avoids a gcc warning with -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The parameter for yield should be handled as a signed integer
for the comparisons to have any effect.

This also avoids a gcc warning with -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The hack added by c5b76b38 was not
enough to avoid warnings with gcc flag -Wtype-limits. Add a new macro
to fix both problems.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The signedness of enum types depend on the compiler implementation.
Therefore the check for negative values may or may not be meaningful.

Fix by explicitly casting to a signed integer.

Since the values are also checked earlier against event_names
table, this is an internal error. Change the 'if' to 'assert'.

This also avoids a warning with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Remove checks which were made useless by r5849,
8da3ff18.

This also avoids a warning with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Use range_covers_byte() instead of comparisons.

This avoids some warnings with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Extract range functions from pci.h. These will be used by later patches
by non-PCI devices. Adjust current users.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Because of the use of unsigned type, possible errors during
load were ignored.

Fix by using a signed type.

This also avoids a warning with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

-1ul is unsigned long, which does not necessarily match abi_ulong
type.

Fix by using abi_long instead.

This also avoids a warning with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

On many systems, socklen_t is defined as unsigned. This means that
checks for negative values are not meaningful.

Fix by explicitly casting to a signed integer.

This also avoids some warnings with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Because of the use of unsigned types, possible errors during
BIOS or kernel load were ignored.

Fix by using a signed type.

This also avoids some warnings with GCC flag -Wtype-limits.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

IEEE 802.3 standard requires Ethernet frames to be at least 64 bytes long.
If it is not the case, they will be considered as runt frames, and may be ignored by netcard and/or OS
Signed-off-by: NHervé Poussineau <hpoussin@reactos.org>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

Packets with TTL=1 may be directed to local network (DHCP/DNS servers for example), so don't discard them
This is required by old versions of NetBSD which send DHCP DISCOVER packets with TTL=1
Signed-off-by: NHervé Poussineau <hpoussin@reactos.org>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>