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2012-10-31raw-win32: implement native asynchronous I/OPaolo Bonzini
With the new support for EventNotifiers in the AIO event loop, we can hook a completion port to every opened file and use asynchronous I/O on them. Wine's support is extremely inefficient, also because it really does the I/O synchronously on regular files. (!) But it works, and it is good to keep the Win32 and POSIX ports as similar as possible. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-posix: move linux-aio.c to block/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-win32: add emulated AIO supportPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-posix: rename raw-posix-aio.h, hide unavailable prototypesPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw: merge posix-aio-compat.c into block/raw-posix.cPaolo Bonzini
Making the qemu_paiocb specific to raw devices will let us access members of the BDRVRawState arbitrarily. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31block: switch posix-aio-compat to threadpoolPaolo Bonzini
This is not meant for portability, but to remove code duplication. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31threadpool: do not take lock in event_notifier_readyPaolo Bonzini
The ordering is: worker thread consumer thread ------------------------------------------------------------------- write ret event_notifier_test_and_clear wmb() read state write state rmb() event_notifier_set read ret Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31aio: add generic thread-pool facilityPaolo Bonzini
Add a generic thread-pool. The code is roughly based on posix-aio-compat.c, with some changes, especially the following: - use QemuSemaphore instead of QemuCond; - separate the state of the thread from the return code of the worker function. The return code is totally opaque for the thread pool; - do not busy wait when doing cancellation. A more generic threadpool (but still specific to I/O so that in the future it can use special scheduling classes or PI mutexes) can have many uses: it allows more flexibility in raw-posix.c and can more easily be extended to Win32, and it will also be used to do an msync of the persistent bitmap. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31qemu-thread: add QemuSemaphorePaolo Bonzini
The new thread pool will use semaphores instead of condition variables, because QemuCond does not have qemu_cond_timedwait. (I also like it more this way). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30linux-aio: use event notifiersPaolo Bonzini
Since linux-aio already uses an eventfd, converting it to use the EventNotifier-based API simplifies the code even though it is not meant to be portable. Reviewed-by: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: clean up now-unused functionsPaolo Bonzini
Some cleanups can now be made, now that the main loop does not anymore need hooks into the bottom half code. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30main-loop: use aio_notify for qemu_notify_eventPaolo Bonzini
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30main-loop: use GSource to poll AIO file descriptorsPaolo Bonzini
This lets us remove the hooks for the main loop in async.c. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: call aio_notify after setting I/O handlersPaolo Bonzini
In the current code, this is done by qemu_set_fd_handler2, which is called by qemu_aio_set_fd_handler. We need to keep the same behavior even after removing the call to qemu_set_fd_handler2. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: add aio_notifyPaolo Bonzini
With this change async.c does not rely anymore on any service from main-loop.c, i.e. it is completely self-contained. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: make AioContexts GSourcesPaolo Bonzini
This lets AioContexts be used (optionally) with a glib main loop. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: add Win32 implementationPaolo Bonzini
The Win32 implementation will only accept EventNotifiers, thus a few drivers are disabled under Windows. EventNotifiers are a good match for the GSource implementation, too, because the Win32 port of glib allows to place their HANDLEs in a GPollFD. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: prepare for introducing GSource-based dispatchPaolo Bonzini
This adds a GPollFD to each AioHandler. It will then be possible to attach these GPollFDs to a GSource, and from there to the main loop. aio_wait examines the GPollFDs and avoids calling select() if any is set (similar to what it does if bottom halves are available). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: add non-blocking variant of aio_waitPaolo Bonzini
This will be used when polling the GSource attached to an AioContext. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: test node->deleted before calling io_flushPaolo Bonzini
Otherwise, there could be a case where io_flush accesses freed memory because it should not have been called. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: add I/O handlers to the AioContext interfacePaolo Bonzini
With this patch, I/O handlers (including event notifier handlers) can be attached to a single AioContext. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: introduce AioContext, move bottom halves therePaolo Bonzini
Start introducing AioContext, which will let us remove globals from aio.c/async.c, and introduce multiple I/O threads. The bottom half functions now take an additional AioContext argument. A bottom half is created with a specific AioContext that remains the same throughout the lifetime. qemu_bh_new is just a wrapper that uses a global context. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: provide platform-independent APIPaolo Bonzini
This adds to aio.c a platform-independent API based on EventNotifiers, that can be used by both POSIX and Win32. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: change qemu_aio_set_fd_handler to return voidPaolo Bonzini
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30vl: init main loop earlierPaolo Bonzini
Otherwise, chardevs will not be able to create a bottom half as soon as that will require an AioContext. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30event_notifier: enable it to use pipesPaolo Bonzini
This takes the eventfd emulation code from the main loop. When the EventNotifier is used for the main loop too, we need this compatibility code. Without CONFIG_EVENTFD, event_notifier_get_fd is only usable for the "read" side of the notifier, for example to set a select() handler. The return value of event_notifier_set changes to the cleaner 0/-errno. No caller is actually checking the return value. Reviewed-by: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30event_notifier: add Win32 implementationPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30build: do not include main loop where it is not actually usedPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30build: opts-visitor is not really part of QAPIPaolo Bonzini
It is only used by QEMU itself, do not build it into the tests. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30qemu-tool: do not depend on qemu-timer.cPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30main-loop: unify qemu_init_main_loop between QEMU and toolsPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30qemu-timer: make initialization functions idempotentPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30win32: add weak version of qemu_fd_registerPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30iohandler: add weak alias in qemu-sockets.c, for qemu-gaPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30fdsets: use weak aliases instead of qemu-tool.c/qemu-user.cPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30sockets: use weak aliases instead of qemu-tool.cPaolo Bonzini
qemu-tool.c has its own (largeish) set of dependencies. Weak aliases can be placed directly where people use them, and do not contribute to increasing the dependencies of generic utility files. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30compiler: use weak aliases to provide default definitionsPaolo Bonzini
This is simpler and more portable. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30build: move cutils.o and qemu-timer-common.o to oslib-obj-yPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30janitor: move iovector functions out of cutils.cPaolo Bonzini
This removes the dependency of cutils.c on iov.c, and lets us remove iov.o from several builds. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-24win32: fix broken build due to missing QEMU_MADV_HUGEPAGELuiz Capitulino
Commit ad0b5321f1f797274603ebbe20108b0750baee94 forgot to add QEMU_MADV_HUGEPAGE macros for when CONFIG_MADVISE is not defined. This broke the build for Windows. Fix it. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-10-24Merge remote-tracking branch 'bonzini/nbd-next' into stagingAnthony Liguori
* bonzini/nbd-next: (30 commits) qmp: add NBD server commands block: add close notifiers block: prepare code for adding block notifiers qemu-sockets: add socket_listen, socket_connect, socket_parse tests: do not include tools-obj-y Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> qemu-sockets: return InetSocketAddress from inet_parse qapi: add socket address types build: add QAPI files to the tools vnc: drop QERR_VNC_SERVER_FAILED qemu-sockets: add error propagation to Unix socket functions qemu-sockets: add error propagation to inet_parse qemu-sockets: add error propagation to inet_dgram_opts qemu-sockets: add error propagation to inet_connect_addr qemu-sockets: include strerror or gai_strerror output in error messages vnc: add error propagation to vnc_display_open vnc: reorganize code for reverse mode vnc: introduce a single label for error returns vnc: avoid Yoda conditionals qemu-ga: ask and print error information from qemu-sockets nbd: ask and print error information from qemu-sockets ...
2012-10-23qmp: add NBD server commandsPaolo Bonzini
Adding an NBD server inside QEMU is trivial, since all the logic is in nbd.c and can be shared easily between qemu-nbd and QEMU itself. The main difference is that qemu-nbd serves a single unnamed export, while QEMU serves named exports. Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23block: add close notifiersPaolo Bonzini
The first user of close notifiers will be the embedded NBD server. It would be possible to use them to do some of the ad hoc processing (e.g. for block jobs and I/O limits) that is currently done by bdrv_close. Acked-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23block: prepare code for adding block notifiersPaolo Bonzini
There is no reason in principle to skip job cancellation and draining of pending I/O when there is no medium in the disk. Do these unconditionally, which also prepares the code for the next patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23qemu-sockets: add socket_listen, socket_connect, socket_parsePaolo Bonzini
These are QAPI-friendly versions of the qemu-sockets functions. They support IP sockets, Unix sockets, and named file descriptors, using a QAPI union to dispatch to the correct function. Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23tests: do not include tools-obj-yPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23qemu-sockets: return InetSocketAddress from inet_parsePaolo Bonzini
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23qapi: add socket address typesPaolo Bonzini
Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23build: add QAPI files to the toolsPaolo Bonzini
We need them because qemu-sockets will soon be using SocketAddress. Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23Rename target_phys_addr_t to hwaddrAvi Kivity
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are reserved) and its purpose doesn't match the name (most target_phys_addr_t addresses are not target specific). Replace it with a finger-friendly, standards conformant hwaddr. Outstanding patchsets can be fixed up with the command git rebase -i --exec 'find -name "*.[ch]" | xargs s/target_phys_addr_t/hwaddr/g' origin Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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