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authorKevin Wolf <kwolf@redhat.com>2020-10-05 17:58:44 +0200
committerMarkus Armbruster <armbru@redhat.com>2020-10-09 07:08:19 +0200
commit947e47448dcc4e4d7a8b7c42b43acb3435b3ad35 (patch)
tree855a18a7da785ee7dff7919ec9a02be34c6ff51c
parent87e6f4a4d6885006931b371771e2933c40700427 (diff)
monitor: Use getter/setter functions for cur_mon
cur_mon really needs to be coroutine-local as soon as we move monitor command handlers to coroutines and let them yield. As a first step, just remove all direct accesses to cur_mon so that we can implement this in the getter function later. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20201005155855.256490-4-kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
-rw-r--r--audio/wavcapture.c8
-rw-r--r--dump/dump.c2
-rw-r--r--hw/scsi/vhost-scsi.c2
-rw-r--r--hw/virtio/vhost-vsock.c2
-rw-r--r--include/monitor/monitor.h3
-rw-r--r--migration/fd.c4
-rw-r--r--monitor/hmp.c11
-rw-r--r--monitor/misc.c13
-rw-r--r--monitor/monitor.c24
-rw-r--r--monitor/qmp-cmds-control.c2
-rw-r--r--monitor/qmp-cmds.c2
-rw-r--r--monitor/qmp.c7
-rw-r--r--net/socket.c2
-rw-r--r--net/tap.c6
-rw-r--r--softmmu/cpus.c2
-rw-r--r--stubs/monitor-core.c5
-rw-r--r--tests/test-util-sockets.c12
-rw-r--r--trace/control.c2
-rw-r--r--util/qemu-error.c6
-rw-r--r--util/qemu-print.c3
-rw-r--r--util/qemu-sockets.c1
21 files changed, 73 insertions, 46 deletions
diff --git a/audio/wavcapture.c b/audio/wavcapture.c
index 17e87ed6f4..c60286e162 100644
--- a/audio/wavcapture.c
+++ b/audio/wavcapture.c
@@ -1,5 +1,5 @@
#include "qemu/osdep.h"
-#include "monitor/monitor.h"
+#include "qemu/qemu-print.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "audio.h"
@@ -94,9 +94,9 @@ static void wav_capture_info (void *opaque)
WAVState *wav = opaque;
char *path = wav->path;
- monitor_printf (cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n",
- wav->freq, wav->bits, wav->nchannels,
- path ? path : "<not available>", wav->bytes);
+ qemu_printf("Capturing audio(%d,%d,%d) to %s: %d bytes\n",
+ wav->freq, wav->bits, wav->nchannels,
+ path ? path : "<not available>", wav->bytes);
}
static struct capture_ops wav_capture_ops = {
diff --git a/dump/dump.c b/dump/dump.c
index 45da46a952..dec32468d9 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1986,7 +1986,7 @@ void qmp_dump_guest_memory(bool paging, const char *file,
#if !defined(WIN32)
if (strstart(file, "fd:", &p)) {
- fd = monitor_get_fd(cur_mon, p, errp);
+ fd = monitor_get_fd(monitor_cur(), p, errp);
if (fd == -1) {
return;
}
diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c
index a83ffeefc8..4d70fa036b 100644
--- a/hw/scsi/vhost-scsi.c
+++ b/hw/scsi/vhost-scsi.c
@@ -177,7 +177,7 @@ static void vhost_scsi_realize(DeviceState *dev, Error **errp)
}
if (vs->conf.vhostfd) {
- vhostfd = monitor_fd_param(cur_mon, vs->conf.vhostfd, errp);
+ vhostfd = monitor_fd_param(monitor_cur(), vs->conf.vhostfd, errp);
if (vhostfd == -1) {
error_prepend(errp, "vhost-scsi: unable to parse vhostfd: ");
return;
diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index c8f0699b4f..f9db4beb47 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -143,7 +143,7 @@ static void vhost_vsock_device_realize(DeviceState *dev, Error **errp)
}
if (vsock->conf.vhostfd) {
- vhostfd = monitor_fd_param(cur_mon, vsock->conf.vhostfd, errp);
+ vhostfd = monitor_fd_param(monitor_cur(), vsock->conf.vhostfd, errp);
if (vhostfd == -1) {
error_prepend(errp, "vhost-vsock: unable to parse vhostfd: ");
return;
diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 93bedf0b75..543eafcb76 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -5,7 +5,6 @@
#include "qapi/qapi-types-misc.h"
#include "qemu/readline.h"
-extern __thread Monitor *cur_mon;
typedef struct MonitorHMP MonitorHMP;
typedef struct MonitorOptions MonitorOptions;
@@ -13,6 +12,8 @@ typedef struct MonitorOptions MonitorOptions;
extern QemuOptsList qemu_mon_opts;
+Monitor *monitor_cur(void);
+Monitor *monitor_set_cur(Monitor *mon);
bool monitor_cur_is_qmp(void);
void monitor_init_globals(void);
diff --git a/migration/fd.c b/migration/fd.c
index 0a29ecdebf..6f2f50475f 100644
--- a/migration/fd.c
+++ b/migration/fd.c
@@ -26,7 +26,7 @@
void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
{
QIOChannel *ioc;
- int fd = monitor_get_fd(cur_mon, fdname, errp);
+ int fd = monitor_get_fd(monitor_cur(), fdname, errp);
if (fd == -1) {
return;
}
@@ -55,7 +55,7 @@ static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
void fd_start_incoming_migration(const char *fdname, Error **errp)
{
QIOChannel *ioc;
- int fd = monitor_fd_param(cur_mon, fdname, errp);
+ int fd = monitor_fd_param(monitor_cur(), fdname, errp);
if (fd == -1) {
return;
}
diff --git a/monitor/hmp.c b/monitor/hmp.c
index 4ecdefd705..e0cc9e65dd 100644
--- a/monitor/hmp.c
+++ b/monitor/hmp.c
@@ -1300,12 +1300,11 @@ cleanup:
static void monitor_read(void *opaque, const uint8_t *buf, int size)
{
- MonitorHMP *mon;
- Monitor *old_mon = cur_mon;
+ MonitorHMP *mon = container_of(opaque, MonitorHMP, common);
+ Monitor *old_mon;
int i;
- cur_mon = opaque;
- mon = container_of(cur_mon, MonitorHMP, common);
+ old_mon = monitor_set_cur(&mon->common);
if (mon->rs) {
for (i = 0; i < size; i++) {
@@ -1313,13 +1312,13 @@ static void monitor_read(void *opaque, const uint8_t *buf, int size)
}
} else {
if (size == 0 || buf[size - 1] != 0) {
- monitor_printf(cur_mon, "corrupted command\n");
+ monitor_printf(&mon->common, "corrupted command\n");
} else {
handle_hmp_command(mon, (char *)buf);
}
}
- cur_mon = old_mon;
+ monitor_set_cur(old_mon);
}
static void monitor_event(void *opaque, QEMUChrEvent event)
diff --git a/monitor/misc.c b/monitor/misc.c
index 4ea575eea8..ee8db45094 100644
--- a/monitor/misc.c
+++ b/monitor/misc.c
@@ -125,13 +125,12 @@ char *qmp_human_monitor_command(const char *command_line, bool has_cpu_index,
monitor_data_init(&hmp.common, false, true, false);
- old_mon = cur_mon;
- cur_mon = &hmp.common;
+ old_mon = monitor_set_cur(&hmp.common);
if (has_cpu_index) {
int ret = monitor_set_cpu(&hmp.common, cpu_index);
if (ret < 0) {
- cur_mon = old_mon;
+ monitor_set_cur(old_mon);
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index",
"a CPU number");
goto out;
@@ -139,7 +138,7 @@ char *qmp_human_monitor_command(const char *command_line, bool has_cpu_index,
}
handle_hmp_command(&hmp, command_line);
- cur_mon = old_mon;
+ monitor_set_cur(old_mon);
WITH_QEMU_LOCK_GUARD(&hmp.common.mon_lock) {
if (qstring_get_length(hmp.common.outbuf) > 0) {
@@ -297,7 +296,7 @@ static CPUState *mon_get_cpu_sync(Monitor *mon, bool synchronize)
CPUState *mon_get_cpu(void)
{
- return mon_get_cpu_sync(cur_mon, true);
+ return mon_get_cpu_sync(monitor_cur(), true);
}
CPUArchState *mon_get_cpu_env(void)
@@ -1232,6 +1231,7 @@ static void hmp_acl_remove(Monitor *mon, const QDict *qdict)
void qmp_getfd(const char *fdname, Error **errp)
{
+ Monitor *cur_mon = monitor_cur();
mon_fd_t *monfd;
int fd, tmp_fd;
@@ -1270,6 +1270,7 @@ void qmp_getfd(const char *fdname, Error **errp)
void qmp_closefd(const char *fdname, Error **errp)
{
+ Monitor *cur_mon = monitor_cur();
mon_fd_t *monfd;
int tmp_fd;
@@ -1356,7 +1357,7 @@ AddfdInfo *qmp_add_fd(bool has_fdset_id, int64_t fdset_id, bool has_opaque,
const char *opaque, Error **errp)
{
int fd;
- Monitor *mon = cur_mon;
+ Monitor *mon = monitor_cur();
AddfdInfo *fdinfo;
fd = qemu_chr_fe_get_msgfd(&mon->chr);
diff --git a/monitor/monitor.c b/monitor/monitor.c
index 0f32892ad4..099c164c6d 100644
--- a/monitor/monitor.c
+++ b/monitor/monitor.c
@@ -66,13 +66,31 @@ MonitorList mon_list;
int mon_refcount;
static bool monitor_destroyed;
-__thread Monitor *cur_mon;
+static __thread Monitor *cur_monitor;
+
+Monitor *monitor_cur(void)
+{
+ return cur_monitor;
+}
+
+/**
+ * Sets a new current monitor and returns the old one.
+ */
+Monitor *monitor_set_cur(Monitor *mon)
+{
+ Monitor *old_monitor = cur_monitor;
+
+ cur_monitor = mon;
+ return old_monitor;
+}
/**
* Is the current monitor, if any, a QMP monitor?
*/
bool monitor_cur_is_qmp(void)
{
+ Monitor *cur_mon = monitor_cur();
+
return cur_mon && monitor_is_qmp(cur_mon);
}
@@ -209,6 +227,8 @@ int monitor_printf(Monitor *mon, const char *fmt, ...)
*/
int error_vprintf(const char *fmt, va_list ap)
{
+ Monitor *cur_mon = monitor_cur();
+
if (cur_mon && !monitor_cur_is_qmp()) {
return monitor_vprintf(cur_mon, fmt, ap);
}
@@ -217,6 +237,8 @@ int error_vprintf(const char *fmt, va_list ap)
int error_vprintf_unless_qmp(const char *fmt, va_list ap)
{
+ Monitor *cur_mon = monitor_cur();
+
if (!cur_mon) {
return vfprintf(stderr, fmt, ap);
}
diff --git a/monitor/qmp-cmds-control.c b/monitor/qmp-cmds-control.c
index 8f04cfa6e6..a456762f6a 100644
--- a/monitor/qmp-cmds-control.c
+++ b/monitor/qmp-cmds-control.c
@@ -69,6 +69,7 @@ static bool qmp_caps_accept(MonitorQMP *mon, QMPCapabilityList *list,
void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable,
Error **errp)
{
+ Monitor *cur_mon = monitor_cur();
MonitorQMP *mon;
assert(monitor_is_qmp(cur_mon));
@@ -119,6 +120,7 @@ static void query_commands_cb(const QmpCommand *cmd, void *opaque)
CommandInfoList *qmp_query_commands(Error **errp)
{
CommandInfoList *list = NULL;
+ Monitor *cur_mon = monitor_cur();
MonitorQMP *mon;
assert(monitor_is_qmp(cur_mon));
diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index 0ab5b78580..1abef70a89 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -328,7 +328,7 @@ void qmp_add_client(const char *protocol, const char *fdname,
Chardev *s;
int fd;
- fd = monitor_get_fd(cur_mon, fdname, errp);
+ fd = monitor_get_fd(monitor_cur(), fdname, errp);
if (fd < 0) {
return;
}
diff --git a/monitor/qmp.c b/monitor/qmp.c
index d433ceae5b..bb2d9d0cc7 100644
--- a/monitor/qmp.c
+++ b/monitor/qmp.c
@@ -139,12 +139,9 @@ static void monitor_qmp_dispatch(MonitorQMP *mon, QObject *req)
QDict *rsp;
QDict *error;
- old_mon = cur_mon;
- cur_mon = &mon->common;
-
+ old_mon = monitor_set_cur(&mon->common);
rsp = qmp_dispatch(mon->commands, req, qmp_oob_enabled(mon));
-
- cur_mon = old_mon;
+ monitor_set_cur(old_mon);
if (mon->commands == &qmp_cap_negotiation_commands) {
error = qdict_get_qdict(rsp, "error");
diff --git a/net/socket.c b/net/socket.c
index 2d21fddd9c..15b410e8d8 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -727,7 +727,7 @@ int net_init_socket(const Netdev *netdev, const char *name,
if (sock->has_fd) {
int fd, ret;
- fd = monitor_fd_param(cur_mon, sock->fd, errp);
+ fd = monitor_fd_param(monitor_cur(), sock->fd, errp);
if (fd == -1) {
return -1;
}
diff --git a/net/tap.c b/net/tap.c
index 04ce72dd2f..c46ff66184 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -700,7 +700,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
if (vhostfdname) {
int ret;
- vhostfd = monitor_fd_param(cur_mon, vhostfdname, &err);
+ vhostfd = monitor_fd_param(monitor_cur(), vhostfdname, &err);
if (vhostfd == -1) {
if (tap->has_vhostforce && tap->vhostforce) {
error_propagate(errp, err);
@@ -808,7 +808,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
return -1;
}
- fd = monitor_fd_param(cur_mon, tap->fd, errp);
+ fd = monitor_fd_param(monitor_cur(), tap->fd, errp);
if (fd == -1) {
return -1;
}
@@ -862,7 +862,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
}
for (i = 0; i < nfds; i++) {
- fd = monitor_fd_param(cur_mon, fds[i], errp);
+ fd = monitor_fd_param(monitor_cur(), fds[i], errp);
if (fd == -1) {
ret = -1;
goto free_fail;
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index e9d4a44fcc..47cceddd80 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -793,6 +793,6 @@ exit:
void qmp_inject_nmi(Error **errp)
{
- nmi_monitor_handle(monitor_get_cpu_index(cur_mon), errp);
+ nmi_monitor_handle(monitor_get_cpu_index(monitor_cur()), errp);
}
diff --git a/stubs/monitor-core.c b/stubs/monitor-core.c
index 6cff1c4e1d..0cd2d864b2 100644
--- a/stubs/monitor-core.c
+++ b/stubs/monitor-core.c
@@ -3,7 +3,10 @@
#include "qemu-common.h"
#include "qapi/qapi-emit-events.h"
-__thread Monitor *cur_mon;
+Monitor *monitor_cur(void)
+{
+ return NULL;
+}
void monitor_init_qmp(Chardev *chr, bool pretty, Error **errp)
{
diff --git a/tests/test-util-sockets.c b/tests/test-util-sockets.c
index 1bbb16d9b1..f6336e0f91 100644
--- a/tests/test-util-sockets.c
+++ b/tests/test-util-sockets.c
@@ -52,6 +52,7 @@ static void test_fd_is_socket_good(void)
static int mon_fd = -1;
static const char *mon_fdname;
+__thread Monitor *cur_mon;
int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp)
{
@@ -65,15 +66,14 @@ int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp)
}
/*
- * Syms of stubs in libqemuutil.a are discarded at .o file granularity.
- * To replace monitor_get_fd() we must ensure everything in
- * stubs/monitor.c is defined, to make sure monitor.o is discarded
+ * Syms of stubs in libqemuutil.a are discarded at .o file
+ * granularity. To replace monitor_get_fd() and monitor_cur(), we
+ * must ensure that we also replace any other symbol that is used in
+ * the binary and would be taken from the same stub object file,
* otherwise we get duplicate syms at link time.
*/
-__thread Monitor *cur_mon;
+Monitor *monitor_cur(void) { return cur_mon; }
int monitor_vprintf(Monitor *mon, const char *fmt, va_list ap) { abort(); }
-void monitor_init_qmp(Chardev *chr, bool pretty, Error **errp) {}
-void monitor_init_hmp(Chardev *chr, bool use_readline, Error **errp) {}
#ifndef _WIN32
static void test_socket_fd_pass_name_good(void)
diff --git a/trace/control.c b/trace/control.c
index c63a4de732..b35e512dce 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -176,7 +176,7 @@ void trace_enable_events(const char *line_buf)
{
if (is_help_option(line_buf)) {
trace_list_events();
- if (cur_mon == NULL) {
+ if (monitor_cur() == NULL) {
exit(0);
}
} else {
diff --git a/util/qemu-error.c b/util/qemu-error.c
index 3ee41438e9..aa30f03564 100644
--- a/util/qemu-error.c
+++ b/util/qemu-error.c
@@ -171,7 +171,7 @@ static void print_loc(void)
int i;
const char *const *argp;
- if (!cur_mon && progname) {
+ if (!monitor_cur() && progname) {
fprintf(stderr, "%s:", progname);
sep = " ";
}
@@ -208,7 +208,7 @@ static void vreport(report_type type, const char *fmt, va_list ap)
GTimeVal tv;
gchar *timestr;
- if (error_with_timestamp && !cur_mon) {
+ if (error_with_timestamp && !monitor_cur()) {
g_get_current_time(&tv);
timestr = g_time_val_to_iso8601(&tv);
error_printf("%s ", timestr);
@@ -216,7 +216,7 @@ static void vreport(report_type type, const char *fmt, va_list ap)
}
/* Only prepend guest name if -msg guest-name and -name guest=... are set */
- if (error_with_guestname && error_guest_name && !cur_mon) {
+ if (error_with_guestname && error_guest_name && !monitor_cur()) {
error_printf("%s ", error_guest_name);
}
diff --git a/util/qemu-print.c b/util/qemu-print.c
index e79d6b8396..69ba612f56 100644
--- a/util/qemu-print.c
+++ b/util/qemu-print.c
@@ -20,6 +20,7 @@
*/
int qemu_vprintf(const char *fmt, va_list ap)
{
+ Monitor *cur_mon = monitor_cur();
if (cur_mon) {
return monitor_vprintf(cur_mon, fmt, ap);
}
@@ -48,7 +49,7 @@ int qemu_printf(const char *fmt, ...)
int qemu_vfprintf(FILE *stream, const char *fmt, va_list ap)
{
if (!stream) {
- return monitor_vprintf(cur_mon, fmt, ap);
+ return monitor_vprintf(monitor_cur(), fmt, ap);
}
return vfprintf(stream, fmt, ap);
}
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index de4bf7616e..05e5c73f9d 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -1092,6 +1092,7 @@ fail:
static int socket_get_fd(const char *fdstr, int num, Error **errp)
{
+ Monitor *cur_mon = monitor_cur();
int fd;
if (num != 1) {
error_setg_errno(errp, EINVAL, "socket_get_fd: too many connections");