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2018-03-08Merge remote-tracking branch 'remotes/berrange/tags/qio-next-pull-request' ↵Peter Maydell1-2/+3
into staging # gpg: Signature made Wed 07 Mar 2018 11:24:41 GMT # gpg: using RSA key BE86EBB415104FDF # gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" # gpg: aka "Daniel P. Berrange <berrange@redhat.com>" # Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E 8E3F BE86 EBB4 1510 4FDF * remotes/berrange/tags/qio-next-pull-request: qio: non-default context for TLS handshake qio: non-default context for async conn qio: non-default context for threaded qtask qio: store gsources for net listeners qio: introduce qio_channel_add_watch_{full|source} qio: rename qio_task_thread_result Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-03-06chardev: fix leak in tcp_chr_telnet_init_io()Peter Xu1-3/+7
Need to free TCPChardevTelnetInit when session established. Since at it, switch to use G_SOURCE_* macros. Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180301084438.13594-2-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-03-06qio: non-default context for TLS handshakePeter Xu1-0/+1
A new parameter "context" is added to qio_channel_tls_handshake() is to allow the TLS to be run on a non-default context. Still, no functional change. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2018-03-06qio: non-default context for async connPeter Xu1-2/+2
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>
2018-03-02Include less of the generated modular QAPI headersMarkus Armbruster4-4/+3
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>
2018-03-02Include qapi/qmp/qerror.h exactly where neededMarkus Armbruster2-0/+2
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180211093607.27351-2-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
2018-02-09Move include qemu/option.h from qemu-common.h to actual usersMarkus Armbruster11-3/+19
qemu-common.h includes qemu/option.h, but most places that include the former don't actually need the latter. Drop the include, and add it to the places that actually need it. While there, drop superfluous includes of both headers, and separate #include from file comment with a blank line. This cleanup makes the number of objects depending on qemu/option.h drop from 4545 (out of 4743) to 284 in my "build everything" tree. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-20-armbru@redhat.com> [Semantic conflict with commit bdd6a90a9e in block/nvme.c resolved]
2018-02-09Include qapi/error.h exactly where neededMarkus Armbruster3-0/+5
This cleanup makes the number of objects depending on qapi/error.h drop from 1910 (out of 4743) to 1612 in my "build everything" tree. While there, separate #include from file comment with a blank line, and drop a useless comment on why qemu/osdep.h is included first. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-5-armbru@redhat.com> [Semantic conflict with commit 34e304e975 resolved, OSX breakage fixed]
2018-02-07chardev/char-socket: add POLLHUP handlerKlim Kireev1-0/+22
The following behavior was observed for QEMU configured by libvirt to use guest agent as usual for the guests without virtio-serial driver (Windows or the guest remaining in BIOS stage). In QEMU on first connect to listen character device socket the listen socket is removed from poll just after the accept(). virtio_serial_guest_ready() returns 0 and the descriptor of the connected Unix socket is removed from poll and it will not be present in poll() until the guest will initialize the driver and change the state of the serial to "guest connected". In libvirt connect() to guest agent is performed on restart and is run under VM state lock. Connect() is blocking and can wait forever. In this case libvirt can not perform ANY operation on that VM. The bug can be easily reproduced this way: Terminal 1: qemu-system-x86_64 -m 512 -device pci-serial,chardev=serial1 -chardev socket,id=serial1,path=/tmp/console.sock,server,nowait (virtio-serial and isa-serial also fit) Terminal 2: minicom -D unix\#/tmp/console.sock (type something and press enter) C-a x (to exit) Do 3 times: minicom -D unix\#/tmp/console.sock C-a x It needs 4 connections, because the first one is accepted by QEMU, then two are queued by the kernel, and the 4th blocks. The problem is that QEMU doesn't add a read watcher after succesful read until the guest device wants to acquire recieved data, so I propose to install a separate pullhup watcher regardless of whether the device waits for data or not. Signed-off-by: Klim Kireev <klim.kireev@virtuozzo.com> Message-Id: <20180125135129.9305-1-klim.kireev@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-02-05chardev: fix incorrect unref of sourcePeter Xu1-17/+21
glib reported error when pty chardev used: $ ./qemu-system-x86_64 -chardev pty,id=foo -device isa-serial,chardev=foo qemu-system-x86_64: -chardev pty,id=foo: char device redirected to /dev/pts/2 (label foo) (qemu-system-x86_64:27885): GLib-CRITICAL **: g_source_unref: assertion 'source != NULL' failed (qemu-system-x86_64:27885): GLib-CRITICAL **: g_source_unref: assertion 'source != NULL' failed This patch fixes that. Fixes: 2c716ba150 ("chardev: introduce qemu_chr_timeout_add_ms()") CC: Paolo Bonzini <pbonzini@redhat.com> Reported-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180118052049.31119-1-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-01-16chardev: Clean up previous patch indentationEric Blake1-34/+32
The previous patch left in an extra scope layer for ease of review; time to remove it. No semantic change. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20171201232433.25193-5-eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-01-16chardev: Use goto/label instead of do/break/while(0)Eric Blake1-3/+10
Use of a do/while(0) control flow in order to permit an early break is an unusual paradigm, and triggers a false positive with a planned future syntax check against 'while (0);'. Rewrite the code to use a goto instead. This patch temporarily keeps an extra level of indentation to highlight the change; the next patch cleans it up. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20171201232433.25193-4-eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-01-12chardev: introduce qemu_chr_timeout_add_ms()Peter Xu3-34/+55
It's a replacement of g_timeout_add[_seconds]() for chardevs. Chardevs now can have dedicated gcontext, we should always bind chardev tasks onto those gcontext rather than the default main context. Since there are quite a few of g_timeout_add[_seconds]() callers, a new function qemu_chr_timeout_add_ms() is introduced. One thing to mention is that, terminal3270 is still always running on main gcontext. However let's convert that as well since it's still part of chardev codes and in case one day we'll miss that when we move it out of main gcontext too. Also, convert all the timers from GSource tags into GSource pointers. Gsource tag IDs and g_source_remove()s can only work with default gcontext, while now these GSources can logically be attached to other contexts. So let's use explicit g_source_destroy() plus another g_source_unref() to remove a timer. Note: when in the timer handler, we don't need the g_source_destroy() any more since that'll be done automatically if the timer handler returns false (and that's what all the current handlers do). Yet another note: in pty_chr_rearm_timer() we take special care for ms=1000. This patch merged the two cases into one. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180104141835.17987-4-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-01-12chardev: let g_idle_add() be with chardev gcontextPeter Xu1-8/+13
The idle task will be attached to main gcontext even if the chardev backend is running in another gcontext. Fix the only caller by extending the g_idle_add() logic into the more powerful g_source_attach(). It's basically g_idle_add_full() implementation, but with the chardev's gcontext passed in. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180104141835.17987-3-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-01-12chardev: use backend chr context when watch for fePeter Xu1-1/+1
In commit 6bbb6c0644 ("chardev: use per-dev context for io_add_watch_poll", 2017-09-22) all the chardev watches are converted to use per-chardev gcontext to support chardev to be run outside default main thread. However that's still missing one call from the frontend code. Touch that up. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180104141835.17987-2-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21chardev: convert the socket server to QIONetListenerDaniel P. Berrange1-43/+30
Instead of creating a QIOChannelSocket directly for the chardev server socket, use a QIONetListener. This provides the ability to listen on multiple sockets at the same time, so enables full support for IPv4/IPv6 dual stack. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20171218135417.28301-2-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21chardev: fix backend events regression with mux chardevMarc-André Lureau2-6/+22
Kirill noticied that on recent versions on QEMU he was not able to trigger SysRq to invoke debug capabilites of Linux Kernel. He tracked it down to qemu_chr_be_event() ignoring CHR_EVENT_BREAK due s->be being NULL. The bug was introduced in 2.8, commit a4afa548fc6d ("char: move front end handlers in CharBackend"). Since the commit, the qemu_chr_be_event() failed to deliver CHR_EVENT_BREAK due to qemu_chr_fe_init() does not set s->be in case of mux. Let's fix this by teaching mux to send an event to the frontend with the focus. Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Fixes: a4afa548fc6d ("char: move front end handlers in CharBackend") Message-Id: <20171103152824.21948-2-marcandre.lureau@redhat.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21baum: Truncate braille device size to 84x1Samuel Thibault1-1/+7
Baum device bigger than 84 do not actually exist, but the user's own Braille device might be wider than 84 columns. Some guest drivers would be upset by such sizes, so clamp the device size. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Message-Id: <20171211001950.27843-1-samuel.thibault@ens-lyon.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-18misc: remove headers implicitly includedPhilippe Mathieu-Daudé1-4/+0
applied using ./scripts/clean-includes Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Ben Warren <ben@skyportsystems.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-10-12char: don't skip client cleanup if 'connected' flag is unsetDaniel P. Berrange1-10/+9
The tcp_chr_free_connection & tcp_chr_disconnect methods both skip all of their cleanup work unless the 's->connected' flag is set. This flag is set when the incoming client connection is ready to use. Crucially this is *after* the TLS handshake has been completed. So if the TLS handshake fails and we try to cleanup the failed client, all the cleanup is skipped as 's->connected' is still false. The only important thing that should be skipped in this case is sending of the CHR_EVENT_CLOSED, because we never got as far as sending the corresponding CHR_EVENT_OPENED. Every other bit of cleanup can be robust against being called even when s->connected is false. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20171005155057.7664-1-berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-26chardev/baum: fix baum that releases brlapi twiceLiang Yan1-0/+1
Error process of baum_chr_open needs to set brlapi null, so it won't get released twice in char_braille_finalize, which will cause "/usr/bin/qemu-system-x86_64: double free or corruption (!prev)" Signed-off-by: Liang Yan <lyan@suse.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-09-23Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell6-18/+22
* Speed up AddressSpaceDispatch creation (Alexey) * Fix kvm.c assert (David) * Memory fixes and further speedup (me) * Persistent reservation manager infrastructure (me) * virtio-serial: add enable_backend callback (Pavel) * chardev GMainContext fixes (Peter) # gpg: Signature made Fri 22 Sep 2017 20:07:33 BST # gpg: using RSA key 0xBFFBD25F78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: (32 commits) chardev: remove context in chr_update_read_handler chardev: use per-dev context for io_add_watch_poll chardev: add Chardev.gcontext field chardev: new qemu_chr_be_update_read_handlers() scsi: add persistent reservation manager using qemu-pr-helper scsi: add multipath support to qemu-pr-helper scsi: build qemu-pr-helper scsi, file-posix: add support for persistent reservation management memory: Share special empty FlatView memory: seek FlatView sharing candidates among children subregions memory: trace FlatView creation and destruction memory: Create FlatView directly memory: Get rid of address_space_init_shareable memory: Rework "info mtree" to print flat views and dispatch trees memory: Do not allocate FlatView in address_space_init memory: Share FlatView's and dispatch trees between address spaces memory: Move address_space_update_ioeventfds memory: Alloc dispatch tree where topology is generared memory: Store physical root MR in FlatView memory: Rename mem_begin/mem_commit/mem_add helpers ... # Conflicts: # configure
2017-09-22chardev: remove context in chr_update_read_handlerPeter Xu5-9/+5
We had a per-chardev cache for context, then we don't need this parameter to be passed in every time when chr_update_read_handler() called. As long as we are calling chr_update_read_handler() using qemu_chr_be_update_read_handlers() we'll be fine. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1505975754-21555-5-git-send-email-peterx@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-22chardev: use per-dev context for io_add_watch_pollPeter Xu4-5/+5
It was only passed in by chr_update_read_handlers(). However when reconnect, we'll lose that context information. So if a chardev was running on another context (rather than the default context, the NULL pointer), it'll switch back to the default context if reconnection happens. But, it should really stick to the old context. Convert all the callers of io_add_watch_poll() to use the internally cached gcontext. Then the context should be able to survive even after reconnections. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1505975754-21555-4-git-send-email-peterx@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-22chardev: add Chardev.gcontext fieldPeter Xu1-0/+1
It caches the gcontext that is used to poll the chardev IO. Before this patch, we only passed it in via chr_update_read_handlers(). However that may not be enough if the char backend is disconnected and reconnected afterward. There are chardev codes that still assumed the context be NULL (which is the main context). Will fix that up in following up patches. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1505975754-21555-3-git-send-email-peterx@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-22chardev: new qemu_chr_be_update_read_handlers()Peter Xu2-5/+12
Add a wrapper for the chr_update_read_handler(). Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1505975754-21555-2-git-send-email-peterx@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-22buildsys: Move brlapi libs to per objectFam Zheng1-0/+1
baum.o already receives the sdl cflags in its per object variable, do the same for brlapi libs to avoid cluttering libs_softmmu. Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <20170907084700.952-1-famz@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com>
2017-09-04qapi: Mechanically convert FOO_lookup[...] to FOO_str(...)Markus Armbruster1-2/+2
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1503564371-26090-14-git-send-email-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2017-08-01char: don't exit on hmp 'chardev-add help'Anton Nefedov1-1/+1
qemu_chr_new_from_opts() is used from both vl.c and hmp, and it is quite confusing to see qemu suddenly exit after receiving a help option in hmp. Do exit(0) from vl.c instead. Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Message-Id: <1500977081-120929-1-git-send-email-anton.nefedov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-08-01char-fd: remove useless chr pointerMarc-André Lureau1-1/+0
Apparently unused since it was introduced in commit a29753f8aa79a34a324afebe340182a51a5aef11. Now, it can be trivially accessed by CHARDEV() of self. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20170720100046.4424-1-marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-31docs: fix broken paths to docs/devel/tracing.txtPhilippe Mathieu-Daudé1-1/+1
With the move of some docs/ to docs/devel/ on ac06724a71, no references were updated. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-07-14Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell4-31/+152
* gdbstub fixes (Alex) * IOMMU MemoryRegion subclass (Alexey) * Chardev hotswap (Anton) * NBD_OPT_GO support (Eric) * Misc bugfixes * DEFINE_PROP_LINK (minus the ARM patches - Fam) * MAINTAINERS updates (Philippe) # gpg: Signature made Fri 14 Jul 2017 11:06:27 BST # gpg: using RSA key 0xBFFBD25F78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: (55 commits) spapr_rng: Convert to DEFINE_PROP_LINK cpu: Convert to DEFINE_PROP_LINK mips_cmgcr: Convert to DEFINE_PROP_LINK ivshmem: Convert to DEFINE_PROP_LINK dimm: Convert to DEFINE_PROP_LINK virtio-crypto: Convert to DEFINE_PROP_LINK virtio-rng: Convert to DEFINE_PROP_LINK virtio-scsi: Convert to DEFINE_PROP_LINK virtio-blk: Convert to DEFINE_PROP_LINK qdev: Add const qualifier to PropertyInfo definitions qmp: Use ObjectProperty.type if present qdev: Introduce DEFINE_PROP_LINK qdev: Introduce PropertyInfo.create qom: enforce readonly nature of link's check callback translate-all: remove redundant !tcg_enabled check in dump_exec_info vl: fix breakage of -tb-size nbd: Implement NBD_INFO_BLOCK_SIZE on client nbd: Implement NBD_INFO_BLOCK_SIZE on server nbd: Implement NBD_OPT_GO on client nbd: Implement NBD_OPT_GO on server ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-07-14hmp: add hmp analogue for qmp-chardev-changeAnton Nefedov1-1/+1
Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <1499342940-56739-11-git-send-email-anton.nefedov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14char: avoid chardevice direct accessAnton Nefedov1-0/+5
frontends should avoid accessing CharDriver struct where possible Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1499342940-56739-6-git-send-email-anton.nefedov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14char: forbid direct chardevice access for hotswap devicesAnton Nefedov1-0/+7
qemu_chr_fe_get_driver() is unsafe, frontends with hotswap support should not access CharDriver ptr directly as CharDriver might change. Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1499342940-56739-5-git-send-email-anton.nefedov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14char: chardevice hotswapAnton Nefedov1-0/+83
This patch adds a possibility to change a char device without a frontend removal. Ideally, it would have to happen transparently to a frontend, i.e. frontend would continue its regular operation. However, backends are not stateless and are set up by the frontends via qemu_chr_fe_<> functions, and it's not (generally) possible to replay that setup entirely in a backend code, as different chardevs respond to the setup calls differently, so do frontends work differently basing on those setup responses. Moreover, some frontend can generally get and save the backend pointer (qemu_chr_fe_get_driver()), and it will become invalid after backend change. So, a frontend which would like to support chardev hotswap has to register a "backend change" handler, and redo its backend setup there. Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1499342940-56739-4-git-send-email-anton.nefedov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14char: add backend hotswap handlerAnton Nefedov2-1/+4
Frontends should have an interface to setup the handler of a backend change. The interface will be used in the next commits Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1499342940-56739-3-git-send-email-anton.nefedov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14char: move QemuOpts->ChardevBackend translation to a separate funcAnton Nefedov1-30/+51
parse function will be used by the following patch Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Message-Id: <1499342940-56739-2-git-send-email-anton.nefedov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14chardev: block during sync readMarc-André Lureau1-0/+2
A sync read should block until all requested data is available (instead of retrying in qemu_chr_fe_read_all). Change the channel to blocking during sync_read. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20170706170353.32601-1-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2017-07-13char-socket: Report TCP socket waiting as informationAlistair Francis1-2/+2
When QEMU is waiting for a TCP socket connection it reports that message as an error. This isn't an error it is just information so let's change the report to use info_report() instead. Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <b3f3601c52843afca9a9b12c7a4fefd68e60de32.1499866456.git.alistair.francis@xilinx.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-06-29Add chardev-send-break monitor commandStefan Fritsch1-0/+12
Sending a break on a serial console can be useful for debugging the guest. But not all chardev backends support sending breaks (only telnet and mux do). The chardev-send-break command allows to send a break even if using other backends. Signed-off-by: Stefan Fritsch <sf@sfritsch.de> Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20170611074817.13621-1-sf@sfritsch.de> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Use 'send a break' in all 3 pieces of text as suggested by eblake
2017-06-08chardev: don't use alias names in parse_compat()Marc-André Lureau1-2/+2
"parport" is considered "old" since commit 88a946d32d, when "parallel" was added. Similarly for "tty" in commit d59044ef74d. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2017-06-02char: move char devices to chardev/Marc-André Lureau7-0/+1810
Suggested by Paolo Bonzini during series review. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char: make chr_fe_deinit() optionaly delete backendMarc-André Lureau2-2/+5
This simplifies removing a backend for a frontend user (no need to retrieve the associated driver and separate delete call etc). NB: many frontends have questionable handling of ending a chardev. They should probably delete the backend to prevent broken reusage. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char: rename functions that are not part of feMarc-André Lureau1-8/+7
There is no clear reason to have those functions associated with frontend. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char: move CharBackend handling in char-fe unitMarc-André Lureau3-342/+360
Move all the frontend struct and methods to a seperate unit. This avoids accidentally mixing backend and frontend calls, and helps with readabilty. Make qemu_chr_replay() a macro shared by both char and char-fe. Export qemu_chr_write(), and use a macro for qemu_chr_write_all() (nb: yes, CharBackend is for char frontend :) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char: generalize qemu_chr_write_all()Marc-André Lureau1-42/+28
qemu_chr_fe_write() is similar to qemu_chr_write_all(): the later write all with a chardev backend. Make qemu_chr_write() and qemu_chr_fe_write_buffer() take an 'all' argument. If false, handle 'partial' write the way qemu_chr_fe_write() use to, and call qemu_chr_write() from qemu_chr_fe_write(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02chardev: move headers to include/chardevMarc-André Lureau24-339/+39
So they are all in one place. The following patch will move serial & parallel declarations to the respective headers. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char-win: close file handle except with consoleMarc-André Lureau4-13/+8
Only the console handle shouldn't be closed, however, the "file" handle should. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char-win: rename hcom->fileMarc-André Lureau3-24/+24
hcom is the name of the file handle, regardless of the actual chardev driver (serial, file, console etc..). Rename it to be more explicit. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
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