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2011-07-22Merge remote-tracking branch 'qmp/for-anthony' into stagingAnthony Liguori
2011-07-22USB: add usb network redirection supportHans de Goede
This patch adds support for a usb-redir device, which takes a chardev as a communication channel to an actual usbdevice using the usbredir protocol. Compiling the usb-redir device requires usbredir-0.3 to be installed for the usbredir protocol parser, usbredir-0.3 also contains a server for redirecting usb traffic from an actual usb device. You can get the 0.3 release of usbredir here: http://people.fedoraproject.org/~jwrdegoede/usbredir-0.3.tar.bz2 (getting a more formal site for it is a WIP) Example usage: 1) Start usbredirserver for a usb device: sudo usbredirserver 045e:0772 2) Start qemu with usb2 support + a chardev talking to usbredirserver + a usb-redir device using this chardev: qemu ... \ -readconfig docs/ich9-ehci-uhci.cfg \ -chardev socket,id=usbredirchardev,host=localhost,port=4000 \ -device usb-redir,chardev=usbredirchardev,id=usbredirdev Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-07-21qapi: add QMP dispatch functionsMichael Roth
Given an object recieved via QMP, this code uses the dispatch table provided by qmp_registry.c to call the corresponding marshalling/dispatch function and format return values/errors for delivery to the QMP. Currently only synchronous QMP functions are supported, but this will also be used for async QMP functions and QMP guest proxy dispatch as well. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21qapi: add QMP command registration/lookup functionsMichael Roth
Registration/lookup functions for that provide a lookup table for dispatching QMP commands. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21qapi: add QAPI dealloc visitorMichael Roth
Type of Visitor class that can be passed into a qapi-generated C type's visitor function to free() any heap-allocated data types. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21qapi: add QMP output visitorMichael Roth
Type of Visiter class that serves as the inverse of the input visitor: it takes a series of native C types and uses their values to construct a corresponding QObject. The command marshaling/dispatcher functions will use this to convert the output of QMP functions into a QObject that can be sent over the wire. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21qapi: add QMP input visitorMichael Roth
A type of Visiter class that is used to walk a qobject's structure and assign each entry to the corresponding native C type. Command marshaling function will use this to pull out QMP command parameters recieved over the wire and pass them as native arguments to the corresponding C functions. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21qapi: add QAPI visitor coreMichael Roth
Base definitions/includes for Visiter interface used by generated visiter/marshalling code. Includes a GenericList type. Our lists require an embedded element. Since these types are generated, if you want to use them in a different type of data structure, there's no easy way to add another embedded element. The solution is to have non-embedded lists and that what this is. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-21Add hard build dependency on glibAnthony Liguori
GLib is an extremely common library that has a portable thread implementation along with tons of other goodies. GLib and GObject have a fantastic amount of infrastructure we can leverage in QEMU including an object oriented programming infrastructure. Short term, it has a very nice thread pool implementation that we could leverage in something like virtio-9p. It also has a test harness implementation that this series will use. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
2011-07-20Avoid CPU endian memory accesses in devicesBlue Swirl
Don't compile virtio.c in hwlib, it depends on memory accesses performed in CPU endianness. Make loads and stores in CPU endianness unavailable to devices and poison them to avoid further bugs. Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-07-17xen: Clean up build systemJan Kiszka
Introduce CONFIG_XEN_BACKEND so that this new config solely controls the target-independent backend build and CONFIG_XEN can focus on per-target building. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-06-15Merge branch 'cocoa-for-upstream' of git://repo.or.cz/qemu/afaerberBlue Swirl
* 'cocoa-for-upstream' of git://repo.or.cz/qemu/afaerber: Darwin: Fix compilation warning regarding the deprecated daemon() function cocoa: Avoid warning related to multiple handleEvent: definitions cocoa: Revert dependency on VNC cocoa: Provide central qemu_main() prototype Fix libfdt warnings on Darwin configure: Fix check for fdatasync() Remove warning in printf due to type mismatch Cocoa: avoid displaying window when command-line contains '-h' or '-help' Fix compilation warning due to incorrectly specified type cocoa: do not create a spurious window for -version
2011-06-14libcacard: add libcacard.la targetAlon Levy
No flag to configure is required. Instead, added a libcacard.la target that is not built by default, only when requested explicitly via: mkdir build cd build ../configure make libcacard.la make install-libcacard Uses libtool to do actual linking of object files and shared library, and installing. Tested only under linux, but supposed to work on other systems as well. If libtool isn't found you get a message complaining about that, only at build time (since it is not a default target I did not add a message at configure time). New build artifacts: .libs subdirectories (at <buildroot> and <buildroot>/libcacard) *.lo files (at same locations as the respective o files) Added %.lo : %.c rule that uses libtool. Updated clean rule to clean up those artifacts. Added specific rule to call dtrace with libtool wrapper (note that because of a current upstream dtrace bug fixed by systemtap b1568fd85 commit the -fPIC flag isn't actually passed on. still current dtrace+libtool produced object links fine). If libtool is missing any of the following targets will complain and exit 1: any subdir: *.lo root and libcacard: libcacard.la, libcacard-instsall Tested to link and load with all tracing backends.
2011-06-14cocoa: Revert dependency on VNCAndreas Färber
In 821601ea5b02a68ada479731a4d3d07a9876632a (Make VNC support optional) cocoa.o was moved from ui-obj-$(CONFIG_COCOA) to vnc-obj-$(CONFIG_COCOA), adding a dependency on $(CONFIG_VNC). That must've been unintentional. Cc: Jes Sorensen <Jes.Sorensen@redhat.com> Cc: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2011-06-08Merge remote-tracking branch 'jvrao/for-anthony' into stagingAnthony Liguori
2011-06-08virtio: Move virtio-pci to hw libraryJan Kiszka
This module has no target dependencies (except for target_phys_addr_t size) and can thus be built as part of libhw. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-06-07json-parser: propagate error from parserAnthony Liguori
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-06-07Introduce the new error frameworkLuiz Capitulino
New error-handling framework that allows for exception-like error propagation. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-06-01virtio-9p: Use relative includes for files in hwStefan Weil
Commit 353ac78d495ef976242abd868f68d78420861c2c moved the files without fixing the include paths. It used a modified CFLAGS to add hw to the include search path, but this breaks builds where the user wants to set special CFLAGS. Long include paths also increase compilation time. Therefore this patch removes the special CFLAGS for virtio and fixes the include statements by using relative include paths. v2: Remove special CFLAGS. v3: Update needed for latest QEMU. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
2011-06-01virtio-9p: Move device specific code to virtio-9p-deviceAneesh Kumar K.V
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
2011-06-01virtio-9p: Move 9p device registration into virtio-9p.cAneesh Kumar K.V
This patch move the 9p device registration into its own file Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
2011-06-01virtio-9p: Don't link to 9p if virtio is not enabledAneesh Kumar K.V
If virtio is not enabled then we should not pull in virtfs files Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
2011-05-26usb: add ehci adapterGerd Hoffmann
This patch finally merges the EHCI host adapter aka USB 2.0 support. Based on the ehci bits collected @ git://git.kiszka.org/qemu.git ehci EHCI has a long out-of-tree history. Project was started by Mark Burkley, with contributions by Niels de Vos. David S. Ahern continued working on it. Kevin Wolf, Jan Kiszka and Vincent Palatin contributed bugfixes. /me (Gerd Hoffmann) picked it up where it left off, prepared the code for merge, fixed a few bugs and added basic user docs. Cc: David S. Ahern <daahern@cisco.com> Cc: Jan Kiszka <jan.kiszka@web.de> Cc: Kevin Wolf <mail@kevin-wolf.de> Cc: Vincent Palatin <vincent.palatin_qemu@m4x.org> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-05-08libcacard: add correct subdirectory dependenciesPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Cc: qemu-trivial@nongnu.org Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-05-08Fix typos in comments (dependancy -> dependency)Stefan Weil
Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-04-28virtfs: fix build due from renameAnthony Liguori
The latest virtfs pull broke the cris-softmmu target. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-04-27virtio-9p: move 9p files aroundAneesh Kumar K.V
Now that we start adding more files related to 9pfs it make sense to move them to a separate directory Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2011-04-27ide: Split atapi.c outKevin Wolf
Besides moving code, this patch only fixes some whitespace issues in the moved code and makes all functions in atapi.c static which can be static. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-07NBD: Use qemu_socket functions to open TCP and UNIX socketsNick Thomas
This commit has the side-effect of making the qemu-nbd binary capable of binding to IPv6 addresses. ("-b ::1", for instance). block/nbd.c fails to parse IPv6 IP addresses correctly at this point, but will work over IPv6 when given a hostname. It still works over IPv4 as before. We move the qemu-sockets object from the 'common' to the 'block' list in the Makefile. The common list includes the block list, so this is effectively a no-op for the rest of the code. We also add 32-bit 'magic' attributes to nbd_(request|reply) to facilitate calculating maximum request/response sizes later. Signed-off-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-07qemu-img: Initial progress printing supportJes Sorensen
This adds the basic infrastructure for supporting progress output on the command line, as well as progress support for qemu-img commands 'rebase' and 'convert'. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-01ccid: add ccid-card-emulated deviceAlon Levy
This devices uses libcacard (internal) to emulate a smartcard conforming to the CAC standard. It attaches to the usb-ccid bus. Usage instructions (example command lines) are in the following patch in docs/ccid.txt. It uses libcacard which uses nss, so it can work with both hw cards and certificates (files). Signed-off-by: Alon Levy <alevy@redhat.com> --- changes from v20->v21: (Jes Sorenson review) * cosmetics * use qemu-thread and qemu_malloc/qemu_free changes from v19->v20: * checkpatch.pl changes from v18->v19: * add qdev.desc * backend: drop the enumeration property, back to using a string one. changes from v16->v17: * use PROP_TYPE_ENUM for backend changes from v15->v16: * fix error reporting in initfn * bump copyright year * update copyright license changes from v1: * remove stale comments, use only c-style comments * bugfix, forgot to set recv_len * change reader name to 'Virtual Reader'
2011-04-01libcacard: initial commitRobert Relyea
libcacard emulates a Common Access Card (CAC) which is a standard for smartcards. It is used by the emulated ccid card introduced in a following patch. Docs are available in docs/libcacard.txt Signed-off-by: Alon Levy <alevy@redhat.com> --- changes from v24->v25: * Fix out of tree builds. * Fix build with linux-user targets. changes from v23->v24: (Jes Sorensen review 2) * Makefile.target: use obj-$(CONFIG_*) += * remove unrequired includes, include qemu-common before qemu-thread * required adding #define NO_NSPR_10_SUPPORT (harmless) changes from v22->v23: * configure fixes: (reported by Stefan Hajnoczi) * test a = b, not a == b (second isn't portable) * quote $source_path in case it contains spaces - this doesn't really help since there are many other places that need similar fixes, not introduced by this patch. changes from v21->v22: * fix configure to not link libcacard if nss not found (reported by Stefan Hajnoczi) * fix vscclient linkage with simpletrace backend (reported by Stefan Hajnoczi) * card_7816.c: add missing break in ERROR_DATA_NOT_FOUND (reported by William van de Velde) changes from v20->v21: (Jes Sorensen review) * use qemu infrastructure: qemu-thread, qemu-common (qemu_malloc and qemu_free), error_report * assert instead of ASSERT * cosmetic fixes * use strpbrk and isspace * add --disable-nss --enable-nss here, instead of in the final patch. * split vscclient, passthru and docs to following patches. changes from v19->v20: * checkpatch.pl changes from v15->v16: Build: * don't erase self with distclean * fix make clean after make distclean * Makefile: make vscclient link quiet Behavioral: * vcard_emul_nss: load coolkey in more situations * vscclient: * use hton,ntoh * send init on connect, only start vevent thread on response * read payload after header check, before type switch * remove Reconnect * update for vscard_common changes, empty Flush implementation Style/Whitespace: * fix wrong variable usage * remove unused variable * use only C style comments * add copyright header * fix tabulation Signed-off-by: Alon Levy <alevy@redhat.com> libcacard: fix out of tree builds
2011-04-01ccid: add passthru card deviceAlon Levy
The passthru ccid card is a device sitting on the usb-ccid bus and using a chardevice to communicate with a remote device using the VSCard protocol defined in libcacard/vscard_common.h Usage docs available in following patch in docs/ccid.txt Signed-off-by: Alon Levy <alevy@redhat.com> --- Changes from v23->v24: * fixed double license line in header. Changes from v20->v21: (Jes Sorensen review) * add reference to COPYING in header * long comment reformatting Changes from v19->v20: * checkpatch.pl Changes from v18->v19: * add qdev.desc * remove .qdev.unplug (no hot unplug support for ccid bus) Changes from v16->v17: * fix wrong cast when receiving VSC_Error * ccid-card-passthru: force chardev user wakeup by sending Init see lengthy comment below. Changes from v15->v16: Behavioral changes: * return correct size * return error instead of assert if client sent too large ATR * don't assert if client sent too large a size, but add asserts for indices to buffer * reset vscard_in indices on chardev disconnect * handle init from client * error if no chardev supplied * use ntoh, hton * eradicate reader_id_t * remove Reconnect usage (removed from VSCARD protocol) * send VSC_SUCCESS on card insert/remove and reader add/remove Style fixes: * width of line fix * update copyright * remove old TODO's * update file header comment * use macros for debug levels * c++ style comment replacement * update copyright license * fix ATR size comment * fix whitespace in struct def * fix DPRINTF prefix * line width fix ccid-card-passthru: force chardev user wakeup by sending Init The problem: how to wakeup the user of the smartcard when the smartcard device is initialized? Long term solution: have a callback interface. This was done via the deprecated so called chardev ioctl interface. Short term solution: do a write. Specifically we write an Init message. And we change the client to send it's own Init message regardless of receiving this one. Additional Init messages will be regarded as acceptable, the first one received after connection establishment is the determining one wrt capabilities.
2011-04-01usb-ccid: add CCID busAlon Levy
A CCID device is a smart card reader. It is a USB device, defined at [1]. This patch introduces the usb-ccid device that is a ccid bus. Next patches will introduce two card types to use it, a passthru card and an emulated card. [1] http://www.usb.org/developers/devclass_docs/DWG_Smart-Card_CCID_Rev110. Signed-off-by: Alon Levy <alevy@redhat.com> --- changes from v20->v21: (Jes Sorenson review) * cosmetic changes - fix multi line comments. * reorder fields in USBCCIDState * add reference to COPYING * add --enable-smartcard and --disable-smartcard here (moved from last patch) changes from v19->v20: * checkpatch.pl changes from v18->v19: * merged: ccid.h: add copyright, fix define and remove non C89 comments * add qdev.desc changes from v15->v16: Behavioral changes: * fix abort on client answer after card remove * enable migration * remove side affect code from asserts * return consistent self-powered state * mask out reserved bits in ccid_set_parameters * add missing abRFU in SetParameters (no affect on linux guest) whitefixes / comments / consts defines: * remove stale comment * remove ccid_print_pending_answers if no DEBUG_CCID * replace printf's with DPRINTF, remove DEBUG_CCID, add verbosity defines * use error_report * update copyright (most of the code is not original) * reword known bug comment * add missing closing quote in comment * add missing whitespace on one line * s/CCID_SetParameter/CCID_SetParameters/ * add comments * use define for max packet size Comment for "return consistent self-powered state": the Configuration Descriptor bmAttributes claims we are self powered, but we were returning not self powered to USB_REQ_GET_STATUS control message. In practice, this message is not sent by a linux 2.6.35.10-74.fc14.x86_64 guest (not tested on other guests), unless you issue lsusb -v as root (for example).
2011-04-01trace: move trace objects from Makefile to Makefile.objsAlon Levy
2011-03-29extract I/O handler lists to iohandler.cPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-03-22Make VNC support optionalJes Sorensen
Per default VNC is enabled. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-03-15tools: Use real async.c instead of stubsKevin Wolf
It's wrong to call BHs directly, even in tools. The only operations that schedule BHs are called in a loop that (indirectly) contains a call to qemu_bh_poll anyway, so we're not losing the scheduled BHs: Tools either use synchronous functions, which are guaranteed to have completed (including any BHs) when they return; or if they use asynchronous functions, they need to call qemu_aio_wait() or similar functions already today. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-03-13add win32 qemu-thread implementationPaolo Bonzini
For now, qemu_cond_timedwait and qemu_mutex_timedlock are left as POSIX-only functions. They can be removed later, once the patches that remove their uses are in. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-23bitmap: add a generic bitmap and bitops libraryCorentin Chary
Add most used bitmap and bitops functions into bitmap.c and bitops.c. Theses functions are mostly copied from Linux kernel source. Some of these functions are already redefined in the VNC server. Some of them could be used for some block stuff. The yet yo be submitted NUMA work also need bitmaps. bitops_ffsl() and bitops_flsl() are here because bitops/bitmap works on unsigned long, not int, and we can't use current code because: * ffs only works on int * qemu_fls only works on int * ffsl is a GNU extension Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-23vnc: Add ZRLE and ZYWRLE encodings.Corentin Chary
Add ZRLE [1] and ZYWRLE [2] encodings. The code is inspire^W stolen from libvncserver (again), but have been rewriten to match QEMU coding style. [1] http://www.realvnc.com/docs/rfbproto.pdf [2] http://micro-vnc.jp/research/remote_desktop_ng/ZYWRLE/publications/ Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-20applesmc: make optionalBlue Swirl
Based on patch by David Ahern. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-14Set up signalfd under !CONFIG_IOTHREADJan Kiszka
Will be required for SIGBUS handling. For obvious reasons, this will remain a nop on Windows hosts. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-12hpet: make optionalBlue Swirl
Ignore failure with hpet device creation. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-12x86: make vmmouse optionalBlue Swirl
Compile vmmouse in hwlib. Ignore failure if vmmouse device can't be created. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-07ahci: split ICH9 from coreSebastian Herbszt
There are multiple ahci devices out there. The currently implemented ich-9 is only one of the many. So let's split that one out into a separate file to stress the difference. Signed-off-by: Sebastian Herbszt <herbszt@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-02-01Merge remote branch 'spice/spice.v29.pull' into stagingAnthony Liguori
Conflicts: trace-events
2011-01-24spice: add chardev (v5)Alon Levy
Adding a chardev backend for spice, where spice determines what to do with it based on the name attribute given during chardev creation. For usage by spice vdagent in conjunction with a properly named virtio-serial device, and future smartcard channel usage. Example usage: qemu -device virtio-serial -chardev spicevmc,name=vdagent,id=vdagent \ -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 v4->v5: * add tracing events * fix missing comma * fix help string to show debug is optional v3->v4: * updated commit message v1->v3 changes: (v2 had a wrong commit message) * removed spice-qemu-char.h, folded into ui/qemu-spice.h * removed dead IOCTL code * removed comment * removed ifdef CONFIG_SPICE from qemu-config.c and qemu-options.hx help. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-01-24qcow2: Add QcowCacheKevin Wolf
This adds some new cache functions to qcow2 which can be used for caching refcount blocks and L2 tables. When used with cache=writethrough they work like the old caching code which is spread all over qcow2, so for this case we have merely a cleanup. The interesting case is with writeback caching (this includes cache=none) where data isn't written to disk immediately but only kept in cache initially. This leads to some form of metadata write batching which avoids the current "write to refcount block, flush, write to L2 table" pattern for each single request when a lot of cluster allocations happen. Instead, cache entries are only written out if its required to maintain the right order. In the pure cluster allocation case this means that all metadata updates for requests are done in memory initially and on sync, first the refcount blocks are written to disk, then fsync, then L2 tables. This improves performance of scenarios with lots of cluster allocations noticably (e.g. installation or after taking a snapshot). Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-01-11usb: data structs and helpers for usb descriptors.Gerd Hoffmann
This patch adds hw/usb-desc.[ch] files. They carry data structures for various usb descriptors and helper functions to generate usb packets from the structures. The intention is to have a internal representation of the device desription which is more usable than the current char array blobs, so we can have common code handle common usb device emulation using the device description. The usage of this infrastructure is optional for usb drivers as there are cases such as pass-through where it probably isn't very useful. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>