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2021-06-08channel-socket: Only set CLOEXEC if we have space for fdsDr. David Alan Gilbert1-4/+4
MSG_CMSG_CLOEXEC cleans up received fd's; it's really only for Unix sockets, but currently we enable it for everything; some socket types (IP_MPTCP) don't like this. Only enable it when we're giving the recvmsg room to receive fd's anyway. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210421112834.107651-2-dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2020-10-27io: Fix Lesser GPL version numberChetan Pant1-1/+1
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Acked-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20201014134033.14095-1-chetan4windows@gmail.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-04-29io: Fix qio_channel_socket_close() error handlingMarkus Armbruster1-2/+3
The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. qio_channel_socket_close() passes @errp first to socket_listen_cleanup(), and then, if closesocket() fails, to error_setg_errno(). If socket_listen_cleanup() failed, this will trip the assertion in error_setv(). Fix by ignoring a second error. Fixes: 73564c407caedf992a1c688b5fea776a8b56ba2a Cc: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20200422130719.28225-11-armbru@redhat.com>
2019-09-03socket: Add num connections to qio_channel_socket_async()Juan Quintela1-7/+23
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2019-09-03socket: Add num connections to qio_channel_socket_sync()Juan Quintela1-3/+4
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2019-09-03socket: Add backlog parameter to socket_listenJuan Quintela1-1/+1
Current parameter was always one. We continue with that value for now in all callers. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Moved trace to socket_listen
2019-06-12Include qemu-common.h exactly where neededMarkus Armbruster1-1/+1
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
2019-06-12Include qemu/module.h where needed, drop it from qemu-common.hMarkus Armbruster1-0/+1
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-4-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c; ui/cocoa.m fixed up]
2019-01-24io: ensure UNIX client doesn't unlink server socketDaniel P. Berrangé1-15/+4
The qio_channel_socket_close method for was mistakenly unlinking the UNIX server socket, even if the channel was a client connection. This was not noticed with chardevs, since they never call close, but with the VNC server, this caused the VNC server socket to be deleted after the first client quit. The qio_channel_socket_close method also needlessly reimplemented the logic that already exists in socket_listen_cleanup(). Just call that method directly, for listen sockets only. This fixes a regression introduced in QEMU 3.0.0 with commit d66f78e1eaa832f73c771d9df1b606fe75d52a50 Author: Pavel Balaev <mail@void.so> Date: Mon May 21 19:17:35 2018 +0300 Delete AF_UNIX socket after close Fixes launchpad #1795100 Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2018-06-28Delete AF_UNIX socket after closePavel Balaev1-1/+17
Since version 2.12.0 AF_UNIX socket created for QMP exchange is not deleted on instance shutdown. This is due to the fact that function qio_channel_socket_finalize() is called after qio_channel_socket_close(). Signed-off-by: Pavel Balaev <mail@void.so> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2018-03-06qio: non-default context for async connPeter Xu1-6/+9
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 Xu1-3/+6
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 Armbruster1-0/+1
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 jin1-1/+1
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 Xu1-1/+2
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 Zheng1-1/+1
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 guang1-7/+1
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 Bonzini1-5/+11
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. Berrange1-25/+16
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. Berrange1-3/+0
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. Berrange1-7/+1
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 Franciosi1-4/+5
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 Franciosi1-1/+2
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 Franciosi1-1/+1
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 Blake1-4/+5
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 Lureau1-0/+10
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 Lureau1-0/+7
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 Armbruster1-0/+1
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. Berrange1-19/+19
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 Bonzini1-6/+28
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. Berrange1-4/+2
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. Berrange1-2/+2
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 Bonzini1-3/+3
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. Berrange1-1/+1
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 Bonzini1-1/+1
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 Maydell1-0/+1
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. Berrange1-1/+5
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. Berrange1-1/+1
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. Berrange1-4/+3
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. Berrange1-2/+8
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. Berrange1-0/+741
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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