On Thu, Jun 16, 2016 at 09:28:52PM +0200, marcandre.lur...@redhat.com wrote: > From: Marc-André Lureau <marcandre.lur...@redhat.com> > > 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.lur...@redhat.com>
We normally only unlink what we created. unlinking files we didn't create looks like a silent change that might easily break existing users. > --- > include/qemu/sockets.h | 1 + > io/channel-socket.c | 10 ++++++++++ > tests/test-io-channel-socket.c | 2 +- > util/qemu-sockets.c | 18 ++++++++++++++++++ > 4 files changed, 30 insertions(+), 1 deletion(-) > > diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h > index 1bd9218..5dd2648 100644 > --- a/include/qemu/sockets.h > +++ b/include/qemu/sockets.h > @@ -51,6 +51,7 @@ SocketAddress *socket_parse(const char *str, Error **errp); > int socket_connect(SocketAddress *addr, Error **errp, > NonBlockingConnectHandler *callback, void *opaque); > int socket_listen(SocketAddress *addr, Error **errp); > +void socket_listen_cleanup(int fd, Error **errp); > int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp); > > /* Old, ipv4 only bits. Don't use for new code. */ > diff --git a/io/channel-socket.c b/io/channel-socket.c > index 1cd5848..6ec87f8 100644 > --- a/io/channel-socket.c > +++ b/io/channel-socket.c > @@ -400,7 +400,17 @@ static void qio_channel_socket_init(Object *obj) > static void qio_channel_socket_finalize(Object *obj) > { > QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj); > + > if (ioc->fd != -1) { > + if (QIO_CHANNEL(ioc)->features & QIO_CHANNEL_FEATURE_LISTEN) { > + Error *err = NULL; > + > + socket_listen_cleanup(ioc->fd, &err); > + if (err) { > + error_report_err(err); > + err = NULL; > + } > + } > #ifdef WIN32 > WSAEventSelect(ioc->fd, NULL, 0); > #endif > diff --git a/tests/test-io-channel-socket.c b/tests/test-io-channel-socket.c > index 855306b..f73e063 100644 > --- a/tests/test-io-channel-socket.c > +++ b/tests/test-io-channel-socket.c > @@ -383,7 +383,7 @@ static void test_io_channel_unix(bool async) > > qapi_free_SocketAddress(listen_addr); > qapi_free_SocketAddress(connect_addr); > - unlink(TEST_SOCKET); > + g_assert(g_file_test(TEST_SOCKET, G_FILE_TEST_EXISTS) == FALSE); > } > > > diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c > index 0d6cd1f..5d03695 100644 > --- a/util/qemu-sockets.c > +++ b/util/qemu-sockets.c > @@ -997,6 +997,24 @@ int socket_listen(SocketAddress *addr, Error **errp) > return fd; > } > > +void socket_listen_cleanup(int fd, Error **errp) > +{ > + SocketAddress *addr; > + > + addr = socket_local_address(fd, errp); > + > + if (addr->type == SOCKET_ADDRESS_KIND_UNIX > + && addr->u.q_unix.data->path) { > + if (unlink(addr->u.q_unix.data->path) < 0 && errno != ENOENT) { > + error_setg_errno(errp, errno, > + "Failed to unlink socket %s", > + addr->u.q_unix.data->path); > + } > + } > + > + g_free(addr); > +} > + > int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp) > { > int fd; > -- > 2.7.4 >