Remove the core bluetooth code

It's been deprecated since QEMU v3.1. We've explicitly asked in the
deprecation message that people should speak up on qemu-devel in case
they are still actively using the bluetooth part of QEMU, but nobody
ever replied that they are really still using it.

I've tried it on my own to use this bluetooth subsystem for one of my
guests, but I was also not able to get it running anymore: When I was
trying to pass-through a real bluetooth device, either the guest did
not see the device at all, or the guest crashed.

Even worse for the emulated device: When running

 qemu-system-x86_64 -bt device:keyboard

QEMU crashes once you hit a key.

So it seems like the bluetooth stack is not only neglected, it is
completely bitrotten, as far as I can tell. The only attention that
this code got during the past years were some CVEs that have been
spotted there. So this code is a burden for the developers, without
any real benefit anymore. Time to remove it.

Note: hw/bt/Kconfig only gets cleared but not removed here yet.
Otherwise there is a problem with the *-softmmu/config-devices.mak.d
dependency files - they still contain a reference to this file which
gets evaluated first on some build hosts, before the file gets
properly recreated. To avoid breaking these builders, we still need
the file around for some time. It will get removed in a couple of
weeks instead.

Message-Id: <20191120091014.16883-4-thuth@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 0 insertions, 198 deletions

diff --git a/bt-host.c b/bt-host.c
deleted file mode 100644
index 2f8f631c25..0000000000
--- a/bt-host.c
+++ /dev/null
@@ -1,198 +0,0 @@
-/*
- * Wrap a host Bluetooth HCI socket in a struct HCIInfo.
- *
- * Copyright (C) 2008 Andrzej Zaborowski  <balrog@zabor.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 or
- * (at your option) version 3 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "sysemu/bt.h"
-#include "qemu/main-loop.h"
-
-#ifndef _WIN32
-# include <sys/ioctl.h>
-# include <sys/uio.h>
-# ifdef CONFIG_BLUEZ
-#  include <bluetooth/bluetooth.h>
-#  include <bluetooth/hci.h>
-#  include <bluetooth/hci_lib.h>
-# else
-#  include "hw/bt.h"
-#  define HCI_MAX_FRAME_SIZE	1028
-# endif
-
-struct bt_host_hci_s {
-    struct HCIInfo hci;
-    int fd;
-
-    uint8_t hdr[HCI_MAX_FRAME_SIZE];
-    int len;
-};
-
-static void bt_host_send(struct HCIInfo *hci,
-                int type, const uint8_t *data, int len)
-{
-    struct bt_host_hci_s *s = (struct bt_host_hci_s *) hci;
-    uint8_t pkt = type;
-    struct iovec iv[2];
-
-    iv[0].iov_base = (void *)&pkt;
-    iv[0].iov_len  = 1;
-    iv[1].iov_base = (void *) data;
-    iv[1].iov_len  = len;
-
-    while (writev(s->fd, iv, 2) < 0) {
-        if (errno != EAGAIN && errno != EINTR) {
-            fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
-                            errno);
-            return;
-        }
-    }
-}
-
-static void bt_host_cmd(struct HCIInfo *hci, const uint8_t *data, int len)
-{
-    bt_host_send(hci, HCI_COMMAND_PKT, data, len);
-}
-
-static void bt_host_acl(struct HCIInfo *hci, const uint8_t *data, int len)
-{
-    bt_host_send(hci, HCI_ACLDATA_PKT, data, len);
-}
-
-static void bt_host_sco(struct HCIInfo *hci, const uint8_t *data, int len)
-{
-    bt_host_send(hci, HCI_SCODATA_PKT, data, len);
-}
-
-static void bt_host_read(void *opaque)
-{
-    struct bt_host_hci_s *s = (struct bt_host_hci_s *) opaque;
-    uint8_t *pkt;
-    int pktlen;
-
-    /* Seems that we can't read only the header first and then the amount
-     * of data indicated in the header because Linux will discard everything
-     * that's not been read in one go.  */
-    s->len = read(s->fd, s->hdr, sizeof(s->hdr));
-
-    if (s->len < 0) {
-        fprintf(stderr, "qemu: error %i reading HCI frame\n", errno);
-        return;
-    }
-
-    pkt = s->hdr;
-    while (s->len --)
-        switch (*pkt ++) {
-        case HCI_EVENT_PKT:
-            if (s->len < 2)
-                goto bad_pkt;
-
-            pktlen = MIN(pkt[1] + 2, s->len);
-            s->hci.evt_recv(s->hci.opaque, pkt, pktlen);
-            s->len -= pktlen;
-            pkt += pktlen;
-
-            /* TODO: if this is an Inquiry Result event, it's also
-             * interpreted by Linux kernel before we received it, possibly
-             * we should clean the kernel Inquiry cache through
-             * ioctl(s->fd, HCI_INQUIRY, ...).  */
-            break;
-
-        case HCI_ACLDATA_PKT:
-            if (s->len < 4)
-                goto bad_pkt;
-
-            pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
-            s->hci.acl_recv(s->hci.opaque, pkt, pktlen);
-            s->len -= pktlen;
-            pkt += pktlen;
-            break;
-
-        case HCI_SCODATA_PKT:
-            if (s->len < 3)
-                goto bad_pkt;
-
-            pktlen = MIN(pkt[2] + 3, s->len);
-            s->len -= pktlen;
-            pkt += pktlen;
-            break;
-
-        default:
-        bad_pkt:
-            fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]);
-        }
-}
-
-static int bt_host_bdaddr_set(struct HCIInfo *hci, const uint8_t *bd_addr)
-{
-    return -ENOTSUP;
-}
-
-struct HCIInfo *bt_host_hci(const char *id)
-{
-    struct bt_host_hci_s *s;
-    int fd = -1;
-# ifdef CONFIG_BLUEZ
-    int dev_id = hci_devid(id);
-    struct hci_filter flt;
-
-    if (dev_id < 0) {
-        fprintf(stderr, "qemu: `%s' not available\n", id);
-        return 0;
-    }
-
-    fd = hci_open_dev(dev_id);
-
-    /* XXX: can we ensure nobody else has the device opened?  */
-# endif
-
-    if (fd < 0) {
-        fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
-                        id, strerror(errno), errno);
-        return NULL;
-    }
-
-# ifdef CONFIG_BLUEZ
-    hci_filter_clear(&flt);
-    hci_filter_all_ptypes(&flt);
-    hci_filter_all_events(&flt);
-
-    if (qemu_setsockopt(fd, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
-        fprintf(stderr, "qemu: Can't set HCI filter on socket (%i)\n", errno);
-        return 0;
-    }
-# endif
-
-    s = g_malloc0(sizeof(struct bt_host_hci_s));
-    s->fd = fd;
-    s->hci.cmd_send = bt_host_cmd;
-    s->hci.sco_send = bt_host_sco;
-    s->hci.acl_send = bt_host_acl;
-    s->hci.bdaddr_set = bt_host_bdaddr_set;
-
-    qemu_set_fd_handler(s->fd, bt_host_read, NULL, s);
-
-    return &s->hci;
-}
-#else
-struct HCIInfo *bt_host_hci(const char *id)
-{
-    fprintf(stderr, "qemu: bluetooth passthrough not supported (yet)\n");
-
-    return 0;
-}
-#endif