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Fri, 9 Oct 2020 08:34:33 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 03/14] monitor: Use getter/setter functions for cur_mon Date: Fri, 9 Oct 2020 08:34:21 +0200 Message-Id: <20201009063432.303441-4-armbru@redhat.com> In-Reply-To: <20201009063432.303441-1-armbru@redhat.com> References: <20201009063432.303441-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/09 02:34:37 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, Stefan Hajnoczi Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Kevin Wolf 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 Message-Id: <20201005155855.256490-4-kwolf@redhat.com> Reviewed-by: Markus Armbruster Reviewed-by: Stefan Hajnoczi Signed-off-by: Markus Armbruster --- include/monitor/monitor.h | 3 ++- audio/wavcapture.c | 8 ++++---- dump/dump.c | 2 +- hw/scsi/vhost-scsi.c | 2 +- hw/virtio/vhost-vsock.c | 2 +- migration/fd.c | 4 ++-- monitor/hmp.c | 11 +++++------ monitor/misc.c | 13 +++++++------ monitor/monitor.c | 24 +++++++++++++++++++++++- monitor/qmp-cmds-control.c | 2 ++ monitor/qmp-cmds.c | 2 +- monitor/qmp.c | 7 ++----- net/socket.c | 2 +- net/tap.c | 6 +++--- softmmu/cpus.c | 2 +- stubs/monitor-core.c | 5 ++++- tests/test-util-sockets.c | 12 ++++++------ trace/control.c | 2 +- util/qemu-error.c | 6 +++--- util/qemu-print.c | 3 ++- util/qemu-sockets.c | 1 + 21 files changed, 73 insertions(+), 46 deletions(-) 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/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 : "", wav->bytes); + qemu_printf("Capturing audio(%d,%d,%d) to %s: %d bytes\n", + wav->freq, wav->bits, wav->nchannels, + path ? path : "", 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/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"); -- 2.26.2