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socket: unlink unix socket on remove 

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>
This commit is contained in:
Marc-André Lureau 2016-06-16 21:28:52 +02:00 committed by Paolo Bonzini
parent 3fa27a9a1e
commit 74b6ce43e3
4 changed files with 30 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/qemu/sockets.h
View File

@ -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. */

10
io/channel-socket.c
View File

@ -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

2
tests/test-io-channel-socket.c
View File

@ -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);
}

18
util/qemu-sockets.c
View File

@ -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;