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2018-03-06qio: non-default context for async connPeter Xu
We have worked on qio_task_run_in_thread() already. Further, let all the qio channel APIs use that context. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2018-03-06qio: non-default context for threaded qtaskPeter Xu
qio_task_run_in_thread() allows main thread to run blocking operations in the background. However it has an assumption on that it's always working with the default context. This patch tries to allow the threaded QIO task framework to run with non-default gcontext. Currently no functional change so far, so the QIOTasks are still always running on main context. Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2018-03-02Include less of the generated modular QAPI headersMarkus Armbruster
In my "build everything" tree, a change to the types in qapi-schema.json triggers a recompile of about 4800 out of 5100 objects. The previous commit split up qmp-commands.h, qmp-event.h, qmp-visit.h, qapi-types.h. Each of these headers still includes all its shards. Reduce compile time by including just the shards we actually need. To illustrate the benefits: adding a type to qapi/migration.json now recompiles some 2300 instead of 4800 objects. The next commit will improve it further. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180211093607.27351-24-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> [eblake: rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
2017-09-05util: remove the obsolete non-blocking connectCao jin
The non-blocking connect mechanism is obsolete, and it doesn't work well in inet connection, because it will call getaddrinfo first and getaddrinfo will blocks on DNS lookups. Since commit e65c67e4 & d984464e, the non-blocking connect of migration goes through QIOChannel in a different manner(using a thread), and nobody use this old non-blocking connect anymore. Any newly written code which needs a non-blocking connect should use the QIOChannel code, so we can drop NonBlockingConnectHandler as a concept entirely. Suggested-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-08-02io: fix qio_channel_socket_accept err handlingPeter Xu
When accept failed, we should setup errp with the reason. More importantly, the caller may assume errp be non-NULL when error happens, and not setting the errp may crash QEMU. At the same time, move the trace_qio_channel_socket_accept_fail() after the if check on EINTR. Two reasons: 1. when EINTR happened, it's not really a fault (we should just try again), so we should not log with an "accept failure". 2. trace_*() functions may overwrite errno, then the old errno will be missing. We need to either check errno before trace_*() calls, or reserve the errno. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1501666880-10159-3-git-send-email-peterx@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-24socket: Make errp the last parameter of socket_connectFam Zheng
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>
2017-04-04io: fix incoming client socket initializationWang guang
The channel socket was initialized manually, but forgot to set QIO_CHANNEL_FEATURE_SHUTDOWN. Thus, the colo_process_incoming_thread would hang at recvmsg. This patch just call qio_channel_socket_new to get channel, Which set QIO_CHANNEL_FEATURE_SHUTDOWN already. Signed-off-by: Wang Guang<wang.guang55@zte.com.cn> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-02-21io: add methods to set I/O handlers on AioContextPaolo Bonzini
This is in preparation for making qio_channel_yield work on AioContexts other than the main one. Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 20170213135235.12274-6-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-01-23io: remove Error parameter from QIOTask thread workerDaniel P. Berrange
Now that task objects have a directly associated error, there's no need for an an Error **errp parameter to the QIOTask thread worker function. It already has a QIOTask object, so can directly set the error on it. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-01-23io: stop incrementing reference in qio_task_get_sourceDaniel P. Berrange
Incrementing the reference in qio_task_get_source is not necessary, since we're not running concurrently with any other code touching the QIOTask. This minimizes chances of further memory leaks. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-10-27io: set LISTEN flag explicitly for listen socketsDaniel P. Berrange
The SO_ACCEPTCONN ioctl is not portable across OS, with some BSD versions and OS-X not supporting it. There is no viable alternative to this, so instead just set the feature explicitly when creating a listener socket. The current users of qio_channel_socket_new_fd() won't ever be given a listening socket, so there's no problem with no auto-detecting it in this scenario Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-10-26io: Introduce a qio_channel_set_feature() helperFelipe Franciosi
Testing QIOChannel feature support can be done with a helper called qio_channel_has_feature(). Setting feature support, however, was done manually with a logical OR. This patch introduces a new helper called qio_channel_set_feature() and makes use of it where applicable. Signed-off-by: Felipe Franciosi <felipe@nutanix.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-10-26io: Use qio_channel_has_feature() where applicableFelipe Franciosi
Parts of the code have been testing QIOChannel features directly with a logical AND. This patch makes it all consistent by using the qio_channel_has_feature() function to test if a feature is present. Signed-off-by: Felipe Franciosi <felipe@nutanix.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-10-26io: Fix double shift usages on QIOChannel featuresFelipe Franciosi
When QIOChannels were introduced in 666a3af9, the feature bits were already defined shifted. However, when using them, the code was shifting them again. The incorrect use was consistent until 74b6ce43, where QIO_CHANNEL_FEATURE_LISTEN was defined shifted but tested unshifted. This patch changes the definition to be unshifted and fixes the incorrect usage introduced on 74b6ce43. Signed-off-by: Felipe Franciosi <felipe@nutanix.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-07-06sockets: Use new QAPI cloningEric Blake
Rather than rolling our own clone via an expensive conversion in and back out of QObject, use the new clone visitor. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1465490926-28625-15-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-06-29socket: unlink unix socket on removeMarc-André Lureau
qemu leaves unix socket files behind when removing a listening chardev or leaving. qemu could clean that up, even if doing so isn't race-free. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1347077 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1466105332-10285-4-git-send-email-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-06-29socket: add listen featureMarc-André Lureau
Add a flag to tell whether the channel socket is listening. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1466105332-10285-3-git-send-email-marcandre.lureau@redhat.com> Acked-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2016-03-22include/qemu/osdep.h: Don't include qapi/error.hMarkus Armbruster
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the Error typedef. Since then, we've moved to include qemu/osdep.h everywhere. Its file comment explains: "To avoid getting into possible circular include dependencies, this file should not include any other QEMU headers, with the exceptions of config-host.h, compiler.h, os-posix.h and os-win32.h, all of which are doing a similar job to this file and are under similar constraints." qapi/error.h doesn't do a similar job, and it doesn't adhere to similar constraints: it includes qapi-types.h. That's in excess of 100KiB of crap most .c files don't actually need. Add the typedef to qemu/typedefs.h, and include that instead of qapi/error.h. Include qapi/error.h in .c files that need it and don't get it now. Include qapi-types.h in qom/object.h for uint16List. Update scripts/clean-includes accordingly. Update it further to match reality: replace config.h by config-target.h, add sysemu/os-posix.h, sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h comment quoted above similarly. This reduces the number of objects depending on qapi/error.h from "all of them" to less than a third. Unfortunately, the number depending on qapi-types.h shrinks only a little. More work is needed for that one. Signed-off-by: Markus Armbruster <armbru@redhat.com> [Fix compilation without the spice devel packages. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-10osdep: remove use of socket_error() from all codeDaniel P. Berrange
Now that QEMU wraps the Win32 sockets methods to automatically set errno upon failure, there is no reason for callers to use the socket_error() method. They can rely on accessing errno even on Win32. Remove all use of socket_error() from general code, leaving it as a static method in oslib-win32.c only. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-10io: implement socket watch for win32 using WSAEventSelect+selectPaolo Bonzini
On Win32 we cannot directly poll on socket handles. Instead we create a Win32 event object and associate the socket handle with the event. When the event signals readyness we then have to use select to determine which events are ready. Creating Win32 events is moderately heavyweight, so we don't want todo it every time we create a GSource, so this associates a single event with a QIOChannel. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-10io: remove checking of EWOULDBLOCKDaniel P. Berrange
Since we now canonicalize WSAEWOULDBLOCK into EAGAIN there is no longer any need to explicitly check EWOULDBLOCK for Win32. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-10io: use qemu_accept to ensure SOCK_CLOEXEC is setDaniel P. Berrange
The QIOChannelSocket code mistakenly uses the bare accept() function which does not set SOCK_CLOEXEC. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-10io: introduce qio_channel_create_socket_watchPaolo Bonzini
Sockets are not in the same namespace as file descriptors on Windows. As an initial step, introduce separate APIs for file descriptor and socket watches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-10io: fix copy+paste mistake in socket error messageDaniel P. Berrange
s/write/read/ in the error message reported after readmsg() fails Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-02-09qemu-char, io: fix ordering of arguments for UDP socket creationPaolo Bonzini
Two wrongs make a right, but they should be fixed anyway. Cc: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1455015557-15106-1-git-send-email-pbonzini@redhat.com>
2016-02-04io: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-14-git-send-email-peter.maydell@linaro.org
2016-01-20io: use memset instead of { 0 } for initializing arrayDaniel P. Berrange
Some versions of GCC on OS-X complain about CMSG_SPACE not being constant size, which prevents use of { 0 } io/channel-socket.c: In function 'qio_channel_socket_writev': io/channel-socket.c:497:18: error: variable-sized object may not be initialized char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)] = { 0 }; The compiler is at fault here, but it is nicer to avoid tickling this compiler bug by using memset instead. Reviewed-By: John Arbuckle <programmingkidx@gmail.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-01-19io: fix sign of errno value passed to error reportDaniel P. Berrange
When reporting the number of FDs has been exceeded, pass EINVAL to error_setg_errno, rather than -EINVAL. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-12-23io: fix stack allocation when sending of file descriptorsDaniel P. Berrange
When sending file descriptors over a socket, we have to allocate a data buffer to hold the FDs in the scmsghdr. Unfortunately we allocated the buffer on the stack inside an if () {} block, but called sendmsg() outside the block. So the stack bytes holding the FDs were liable to be overwritten with other data. By luck this was not a problem when sending 1 FD, but if sending 2 or more then it would fail. The fix is to simply move the variables outside the nested 'if' block. To keep valgrind quiet we also zero-initialize the 'control' buffer. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-12-22io: fix setting of QIO_CHANNEL_FEATURE_FD_PASS on server connectionsDaniel P. Berrange
The QIO_CHANNEL_FEATURE_FD_PASS feature flag is set in the qio_channel_socket_set_fd() method, however, this only deals with client side connections. To ensure server side connections also have the feature flag set, we must set it in qio_channel_socket_accept() too. This also highlighted a typo fix where the code updated the sockaddr struct in the wrong object instance. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-12-18io: add QIOChannelSocket classDaniel P. Berrange
Implement a QIOChannel subclass that supports sockets I/O. The implementation is able to manage a single socket file descriptor, whether a TCP/UNIX listener, TCP/UNIX connection, or a UDP datagram. It provides APIs which can listen and connect either asynchronously or synchronously. Since there is no asynchronous DNS lookup API available, it uses the QIOTask helper for spawning a background thread to ensure non-blocking operation. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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