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2013-04-08qemu-char: really fix behavior on can_read = 0Paolo Bonzini
I misread the glib manual, g_source_remove does not let you re-attach the source later. This behavior (called "blocking" the source in glib) is present in glib's source code, but private and not available outside glib; hence, we have to resort to re-creating the source every time. In fact, g_source_remove and g_source_destroy are the same thing, except g_source_destroy is O(1) while g_source_remove scans a potentially very long list of GSources in the current main loop. Ugh. Better use g_source_destroy explicitly, and leave "tags" to those dummies who cannot track their pointers' lifetimes. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1365426195-12596-1-git-send-email-pbonzini@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-05qemu-char: eliminate busy waiting on can_read returning zeroPaolo Bonzini
The character backend refactoring introduced an undesirable busy wait. The busy wait happens if can_read returns zero and there is data available on the character device's file descriptor. Then, the I/O watch will fire continuously and, with TCG, the CPU thread will never run. 1) Char backend asks front end if it can write 2) Front end says no 3) poll() finds the char backend's descriptor is available 4) Goto (1) What we really want is this (note that step 3 avoids the busy wait): 1) Char backend asks front end if it can write 2) Front end says no 3) poll() goes on without char backend's descriptor 4) Goto (1) until qemu_chr_accept_input() called 5) Char backend asks front end if it can write 6) Front end says yes 7) poll() finds the char backend's descriptor is available 8) Backend handler called After this patch, the IOWatchPoll source and the watch source are separated. The IOWatchPoll is simply a hook that runs during the prepare phase on each main loop iteration. The hook adds/removes the actual source depending on the return value from can_read. A simple reproducer is qemu-system-i386 -serial mon:stdio ... followed by banging on the terminal as much as you can. :) Without this patch, emulation will hang. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1365177573-11817-1-git-send-email-pbonzini@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-05chardev: drop the Memory chardev driverLuiz Capitulino
It's not used anymore since the last commit. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com>
2013-04-04qemu-char: Call fe_claim / fe_release when not using qdev chr propertiesHans de Goede
chardev-frontends need to explictly check, increase and decrement the avail_connections "property" of the chardev when they are not using a qdev-chardev-property for the chardev. This fixes things like: qemu-kvm -chardev stdio,id=foo -device isa-serial,chardev=foo \ -mon chardev=foo Working, where they should fail. Most of the changes here are due to old hardware emulation code which is using serial_hds directly rather then a qdev-chardev-property. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364412581-3672-3-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-04qemu-char: Add qemu_chr_fe_claim / _release helper functionsHans de Goede
Add qemu_chr_fe_claim / _release helper functions for properly dealing with avail_connections. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364412581-3672-2-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-02Merge remote-tracking branch 'luiz/queue/qmp' into stagingAnthony Liguori
# By Stefan Hajnoczi # Via Luiz Capitulino * luiz/queue/qmp: chardev: clear O_NONBLOCK on SCM_RIGHTS file descriptors qemu-socket: set passed fd non-blocking in socket_connect() net: ensure "socket" backend uses non-blocking fds oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()
2013-04-02chardev: clear O_NONBLOCK on SCM_RIGHTS file descriptorsStefan Hajnoczi
When we receive a file descriptor over a UNIX domain socket the O_NONBLOCK flag is preserved. Clear the O_NONBLOCK flag and rely on QEMU file descriptor users like migration, SPICE, VNC, block layer, and others to set non-blocking only when necessary. This change ensures we don't accidentally expose O_NONBLOCK in the QMP API. QMP clients should not need to get the non-blocking state "correct". A recent real-world example was when libvirt passed a non-blocking TCP socket for migration where we expected a blocking socket. The source QEMU produced a corrupted migration stream since its code did not cope with non-blocking sockets. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-04-02oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()Stefan Hajnoczi
The fcntl(fd, F_SETFL, O_NONBLOCK) flag is not specific to sockets. Rename to qemu_set_nonblock() just like qemu_set_cloexec(). Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-04-02qemu-char: rewrite io_channel_send_all and drop the '_all' suffixAnthony Liguori
The current code is oddly written and have equally odd semantics. Despite the '_all' suffix, upon EAGAIN the result will be a partial write but instead of returning the partial write, we return EAGAIN. Change the behavior to write as much as we can until we get an EAGAIN returning a partial write if we do. Reported-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Message-id: 1364575190-731-1-git-send-email-aliguori@us.ibm.com
2013-03-27qemu-char: add_handlers: Don't re-send the be_open event on unregisterHans de Goede
Resending the be_open event only is useful when a frontend is registering, not when it is unregistering. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-9-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Move incrementing of avail_connections to qdev-properties-systemHans de Goede
The decrement of avail_connections is done in qdev-properties-system move the increment there too for proper balancing of the calls. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-8-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Consolidate guest_close/guest_open into a set_fe_open callbackHans de Goede
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-7-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Cleanup: consolidate fe_open/fe_close into fe_set_openHans de Goede
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-6-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Automatically do fe_open / fe_close on qemu_chr_add_handlersHans de Goede
Most frontends can't really determine if the guest actually has the frontend side open. So lets automatically generate fe_open / fe_close as soon as a frontend becomes ready (as signalled by calling qemu_chr_add_handlers) / becomes non ready (as signalled by setting all handlers to NULL). And allow frontends which can actually determine if the guest is listening to opt-out of this. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-5-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Add fe_open trackingHans de Goede
Add tracking of the fe_open state to struct CharDriverState. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-4-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Rename qemu_chr_generic_open to qemu_chr_be_generic_openHans de Goede
To better reflect that it is for handling a backend being opened. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-3-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-27qemu-char: Rename opened to be_openHans de Goede
Rename the opened variable to be_open to reflect that it contains the opened state of the backend. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364292483-16564-2-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-26char: introduce a blocking version of qemu_chr_fe_writeAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-19char: Fix return type of qemu_chr_fe_add_watch()Kevin Wolf
qemu_chr_fe_add_watch() can return negative errors, therefore it must not have an unsigned return type. For consistency with other qemu_chr_fe_* functions, this uses a standard C int instead of glib types. In situations where qemu_chr_fe_add_watch() is falsely assumed to have succeeded, the serial ports would go into a state where it never becomes ready for transmitting more data; this is fixed by this patch. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-13qemu-char.c: fix waiting for telnet connection messageIgor Mitsyanko
Current colon position in "waiting for telnet connection" message template produces messages like: QEMU waiting for connection on: telnet::127.0.0.16666,server After moving a colon to the right, we will get a correct messages like: QEMU waiting for connection on: telnet:127.0.0.1:6666,server Signed-off-by: Igor Mitsyanko <i.mitsyanko@gmail.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add udp support to qapiGerd Hoffmann
This patch adds 'udp' support to qapi. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add memory (ringbuf) support to qapiGerd Hoffmann
This patch adds 'memory' support to qapi and also switches over the memory chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add vc support to qapiGerd Hoffmann
This patch adds 'vc' support to qapi and also switches over the vc chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add spice support to qapiGerd Hoffmann
This patch adds 'spicevmc' and 'spiceport' support to qapi and also switches over the spice chardev initialization to the new qapi code path.
2013-03-13chardev: add pipe support to qapiGerd Hoffmann
This patch adds 'pipe' support to qapi and also switches over the pipe chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add console support to qapiGerd Hoffmann
This patch adds 'console' support to qapi and also switches over the console chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: switch pty init to qapiGerd Hoffmann
This patch switches over the pty chardev initialization to the new qapi code path. Bonus: Taking QemuOpts out of the loop allows some nice cleanups along the way. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: switch parallel init to qapiGerd Hoffmann
This patch switches over the parallel chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: switch serial/tty init to qapiGerd Hoffmann
This patch switches over the serial chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add stdio support to qapiGerd Hoffmann
This patch adds 'stdio' support to qapi and also switches over the stdio chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: switch file init to qapiGerd Hoffmann
This patch switches over the 'file' chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add braille support to qapiGerd Hoffmann
This patch adds 'braille' support to qapi and also switches over the braille chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add msmouse support to qapiGerd Hoffmann
This patch adds 'msmouse' support to qapi and also switches over the msmouse chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: switch null init to qapiGerd Hoffmann
This patch switches over the 'null' chardev initialization to the new qapi code path. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-13chardev: add mux chardev support to qapiGerd Hoffmann
This adds mux chardev support to the qapi and also makes the qapi-based chardev creation path handle the "mux=on" option correctly.
2013-03-13chardev: add support for qapi-based chardev initializationGerd Hoffmann
This patch add support for a new way to initialize chardev devices. Instead of calling a initialization function with a QemuOpts we will now create a (qapi) ChardevBackend, optionally call a function to fill ChardevBackend from QemuOpts, then go create the chardev using the new qapi code path which is also used by chardev-add. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-03-12Add a TPM Passthrough backend driver implementationStefan Berger
This patch is based of off version 9 of Stefan Berger's patch series "QEMU Trusted Platform Module (TPM) integration" and adds a new backend driver for it. This patch adds a passthrough backend driver for passing commands sent to the emulated TPM device directly to a TPM device opened on the host machine. Thus it is possible to use a hardware TPM device in a system running on QEMU, providing the ability to access a TPM in a special state (e.g. after a Trusted Boot). This functionality is being used in the acTvSM Trusted Virtualization Platform which is available on [1]. Usage example: qemu-system-x86_64 -tpmdev passthrough,id=tpm0,path=/dev/tpm0 \ -device tpm-tis,tpmdev=tpm0 \ -cdrom test.iso -boot d Some notes about the host TPM: The TPM needs to be enabled and activated. If that's not the case one has to go through the BIOS/UEFI and enable and activate that TPM for TPM commands to work as expected. It may be necessary to boot the kernel using tpm_tis.force=1 in the boot command line or 'modprobe tpm_tis force=1' in case of using it as a module. Regards, Andreas Niederl, Stefan Berger [1] http://trustedjava.sourceforge.net/ Signed-off-by: Andreas Niederl <andreas.niederl@iaik.tugraz.at> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-6-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-10qemu-char: fix win32 buildBlue Swirl
96c6384776d631839a9c8fe02bf135f9ba22586c did not adjust Win32 #ifdeffery properly, breaking build in later commits. Fix. Signed-off-by: Blue Swirl <blauwirbel@gmail.com> Tested-by: Igor Mitsyanko <i.mitsyanko@gmail.com> Message-id: 0ba5565b1ed44380c57d4a5fab86e9549f581ebf.1362822910.git.blauwirbel@gmail.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: move text console init to console.cAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 17cefde0a8d7807294bab95e93c3328a20d3f2ed.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: move msmouse registeration to msmouse.cAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: b47d1153b0d7669743c9a6bb98ce30f4cf7f876b.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: move baum registration to baum.cAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 1b24baa1ec3a174d5cad31e079d829904b53077b.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: move spice registration to spice-qemu-char.cAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 49a8d12eeb117e5530b2fab02af7681b54f9245c.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: make char drivers dynamically registerableAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 0ff4f5f2b8b7afdb85a0c241403ad73f472f0b81.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: remove use of QEMUTimer in favor of glib idle functionAnthony Liguori
qemu-char is now independent of the QEMU main loop. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 3cda0bbcfb94912df8a767983a52bb71a4a3231d.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: use a glib timeout instead of qemu-timerAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 05a883ce5a98275b976bf0124610599859c2b7da.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08char: add gio watch fn for tcp backendsAmit Shah
Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: b50e668c4f4146a654c5d4412440eb9e589f2c02.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: add pty watchAnthony Liguori
This lets ptys support adding front end watchs. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 23380f37b22d407ba0b9e080f6ea0d66b279f2d2.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: add watch supportAnthony Liguori
This allows a front-end to request for a callback when the backend is writable again. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 96f93c0f741064604bbb6389ce962191120af8b7.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: tcp: make use GIOChannelAnthony Liguori
I didn't bother switching to g_io_channel_read/write because we need to use sendmsg on Unix. No problem though since we're using an unbuffered channel. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 002f726576dfb51bca4854aa257b74d77c1cd4e8.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-08qemu-char: convert UDP to GIOChannelAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Message-id: 775a2bd666a3d1fa008656bf97191b7573c6ffb5.1362505276.git.amit.shah@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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