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char: add backend hotswap handler

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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>
This commit is contained in:
Anton Nefedov 2017-07-06 15:08:49 +03:00 • committed by Paolo Bonzini
parent 313e45b5fe
commit 81517ba37a
48 changed files with 77 additions and 58 deletions
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4
chardev/char-fe.c
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@ -216,7 +216,7 @@ void qemu_chr_fe_deinit(CharBackend *b, bool del)
assert(b);
if (b->chr) {
qemu_chr_fe_set_handlers(b, NULL, NULL, NULL, NULL, NULL, true);
qemu_chr_fe_set_handlers(b, NULL, NULL, NULL, NULL, NULL, NULL, true);
if (b->chr->be == b) {
b->chr->be = NULL;
}
@ -235,6 +235,7 @@ void qemu_chr_fe_set_handlers(CharBackend *b,
IOCanReadHandler *fd_can_read,
IOReadHandler *fd_read,
IOEventHandler *fd_event,
BackendChangeHandler *be_change,
void *opaque,
GMainContext *context,
bool set_open)
@ -258,6 +259,7 @@ void qemu_chr_fe_set_handlers(CharBackend *b,
b->chr_can_read = fd_can_read;
b->chr_read = fd_read;
b->chr_event = fd_event;
b->chr_be_change = be_change;
b->opaque = opaque;
if (cc->chr_update_read_handler) {
cc->chr_update_read_handler(s, context);