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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 08/35] libxl: Replace libxl__qmp_initializations by ev_qmp calls
Setup a timeout of 10s for all the commands. It used to be about 5s
per commands.
The order of command is changed, we call 'query-vnc' before
'change-vnc-password', but that should not matter. That makes it
easier to call 'change-vnc-password' conditionally.
Also 'change' command is replaced by 'change-vnc-password'
because 'change' is deprecated. The new command is available in all
QEMU versions that also have Xen support.
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
tools/libxl/libxl_dm.c | 211 ++++++++++++++++++++++++++++++++++-
tools/libxl/libxl_internal.h | 8 +-
tools/libxl/libxl_qmp.c | 169 ----------------------------
3 files changed, 212 insertions(+), 176 deletions(-)
diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index 5a2e349776..bb5339784e 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -2063,11 +2063,13 @@ static int libxl__write_stub_dmargs(libxl__gc *gc,
static void dmss_init(libxl__dm_spawn_state *dmss)
{
libxl__ev_qmp_init(&dmss->qmp);
+ libxl__ev_time_init(&dmss->timeout);
}
static void dmss_dispose(libxl__gc *gc, libxl__dm_spawn_state *dmss)
{
libxl__ev_qmp_dispose(gc, &dmss->qmp);
+ libxl__ev_time_deregister(gc, &dmss->timeout);
}
static void spawn_stubdom_pvqemu_cb(libxl__egc *egc,
@@ -2462,6 +2464,16 @@ static void device_model_qmp_cb(libxl__egc *egc,
libxl__ev_qmp *ev,
static void device_model_spawn_outcome(libxl__egc *egc,
libxl__dm_spawn_state *dmss,
int rc);
+static void device_model_postconfig_chardev(libxl__egc *egc,
+ libxl__ev_qmp *qmp, const libxl__json_object *response, int rc);
+static void device_model_postconfig_vnc(libxl__egc *egc,
+ libxl__ev_qmp *qmp, const libxl__json_object *response, int rc);
+static void device_model_postconfig_vnc_passwd(libxl__egc *egc,
+ libxl__ev_qmp *qmp, const libxl__json_object *response, int rc);
+static void devise_model_postconfig_timeout(libxl__egc *egc,
+ libxl__ev_time *ev, const struct timeval *requested_abs, int rc);
+static void device_model_postconfig_done(libxl__egc *egc,
+ libxl__dm_spawn_state *dmss, int rc);
void libxl__spawn_local_dm(libxl__egc *egc, libxl__dm_spawn_state *dmss)
{
@@ -2763,12 +2775,209 @@ static void device_model_spawn_outcome(libxl__egc *egc,
}
}
+ /* Check if spawn failed */
+ if (rc) goto out;
+
if (d_config->b_info.device_model_version
== LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN) {
- libxl__qmp_initializations(gc, dmss->guest_domid, d_config);
+ rc = libxl__ev_time_register_rel(ao, &dmss->timeout,
+ devise_model_postconfig_timeout,
+ LIBXL_QMP_CMD_TIMEOUT * 1000);
+ if (rc) goto out;
+ dmss->qmp.ao = ao;
+ dmss->qmp.domid = dmss->guest_domid;
+ dmss->qmp.payload_fd = -1;
+ dmss->qmp.callback = device_model_postconfig_chardev;
+ rc = libxl__ev_qmp_send(gc, &dmss->qmp, "query-chardev", NULL);
+ if (rc) goto out;
+ return;
}
out:
+ device_model_postconfig_done(egc, dmss, rc); /* must be last */
+}
+
+static void device_model_postconfig_chardev(libxl__egc *egc,
+ libxl__ev_qmp *qmp, const libxl__json_object *response, int rc)
+{
+ EGC_GC;
+ libxl__dm_spawn_state *dmss = CONTAINER_OF(qmp, *dmss, qmp);
+ const libxl__json_object *item = NULL;
+ const libxl__json_object *o = NULL;
+ int i = 0;
+ const char *label;
+ const char *filename;
+ int port;
+ char *endptr;
+ const char *dompath;
+ const char serial[] = "serial";
+ const size_t seriall = sizeof(serial) - 1;
+ const char pty[] = "pty:";
+ const size_t ptyl = sizeof(pty) - 1;
+
+ if (rc) goto out;
+
+ /*
+ * query-chardev response:
+ * [{ 'label': 'str',
+ * 'filename': 'str',
+ * 'frontend-open': 'bool' }, ...]
+ */
+
+ for (i = 0; (item = libxl__json_array_get(response, i)); i++) {
+ o = libxl__json_map_get("label", item, JSON_STRING);
+ if (!o) goto protocol_error;
+ label = libxl__json_object_get_string(o);
+
+ /* Check if the "label" start with "serial". */
+ if (!label || strncmp(label, serial, seriall))
+ continue;
+ port = strtol(label + seriall, &endptr, 10);
+ if (*(label + seriall) == '\0' || *endptr != '\0') {
+ LOGD(ERROR, qmp->domid,
+ "Invalid serial port number: %s", label);
+ rc = ERROR_QEMU_API;
+ goto out;
+ }
+
+ o = libxl__json_map_get("filename", item, JSON_STRING);
+ if (!o) goto protocol_error;
+ filename = libxl__json_object_get_string(o);
+
+ /* Check if filename start with "pty:" */
+ if (!filename || strncmp(filename, pty, ptyl))
+ continue;
+
+ dompath = libxl__xs_get_dompath(gc, qmp->domid);
+ if (!dompath) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+ rc = libxl__xs_printf(gc, XBT_NULL,
+ GCSPRINTF("%s/serial/%d/tty", dompath, port),
+ "%s", filename + ptyl);
+ if (rc) goto out;
+ }
+
+ qmp->callback = device_model_postconfig_vnc;
+ rc = libxl__ev_qmp_send(gc, qmp, "query-vnc", NULL);
+ if (rc) goto out;
+ return;
+
+protocol_error:
+ rc = ERROR_QEMU_API;
+ LOGD(ERROR, qmp->domid,
+ "unexpected response to QMP cmd 'query-chardev', received:\n%s",
+ JSON(response));
+out:
+ device_model_postconfig_done(egc, dmss, rc); /* must be last */
+}
+
+static void device_model_postconfig_vnc(libxl__egc *egc,
+ libxl__ev_qmp *qmp, const libxl__json_object *response, int rc)
+{
+ EGC_GC;
+ libxl__dm_spawn_state *dmss = CONTAINER_OF(qmp, *dmss, qmp);
+ const libxl_vnc_info *vnc = libxl__dm_vnc(dmss->guest_config);
+ const libxl__json_object *o;
+ libxl__json_object *args = NULL;
+
+ if (rc) goto out;
+
+ /*
+ * query-vnc response:
+ * { 'enabled': 'bool', '*host': 'str', '*service': 'str' }
+ */
+
+ o = libxl__json_map_get("enabled", response, JSON_BOOL);
+ if (!o) goto protocol_error;
+ if (libxl__json_object_get_bool(o)) {
+ const char *addr, *port;
+ const char *dompath;
+
+ o = libxl__json_map_get("host", response, JSON_STRING);
+ if (!o) goto protocol_error;
+ addr = libxl__json_object_get_string(o);
+ o = libxl__json_map_get("service", response, JSON_STRING);
+ if (!o) goto protocol_error;
+ port = libxl__json_object_get_string(o);
+
+ dompath = libxl__xs_get_dompath(gc, qmp->domid);
+ if (!dompath) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+ rc = libxl__xs_printf(gc, XBT_NULL,
+ GCSPRINTF("%s/console/vnc-listen", dompath),
+ "%s", addr);
+ if (rc) goto out;
+ rc = libxl__xs_printf(gc, XBT_NULL,
+ GCSPRINTF("%s/console/vnc-port", dompath),
+ "%s", port);
+ if (rc) goto out;
+ }
+
+ if (vnc && vnc->passwd) {
+ qmp->callback = device_model_postconfig_vnc_passwd;
+ libxl__qmp_param_add_string(gc, &args, "password", vnc->passwd);
+ rc = libxl__ev_qmp_send(gc, qmp, "change-vnc-password", args);
+ if (rc) goto out;
+ return;
+ }
+
+ rc = 0;
+ goto out;
+
+protocol_error:
+ rc = ERROR_QEMU_API;
+ LOGD(ERROR, qmp->domid,
+ "unexpected response to QMP cmd 'query-vnc', received:\n%s",
+ JSON(response));
+out:
+ device_model_postconfig_done(egc, dmss, rc); /* must be last */
+}
+
+static void device_model_postconfig_vnc_passwd(libxl__egc *egc,
+ libxl__ev_qmp *qmp, const libxl__json_object *response, int rc)
+{
+ EGC_GC;
+ libxl__dm_spawn_state *dmss = CONTAINER_OF(qmp, *dmss, qmp);
+ const libxl_vnc_info *vnc = libxl__dm_vnc(dmss->guest_config);
+ const char *dompath;
+
+ if (rc) goto out;
+
+ dompath = libxl__xs_get_dompath(gc, qmp->domid);
+ if (!dompath) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+ rc = libxl__xs_printf(gc, XBT_NULL,
+ GCSPRINTF("%s/console/vnc-pass", dompath),
+ "%s", vnc->passwd);
+
+out:
+ device_model_postconfig_done(egc, dmss, rc); /* must be last */
+}
+
+void devise_model_postconfig_timeout(libxl__egc *egc, libxl__ev_time *ev,
+ const struct timeval *requested_abs,
+ int rc)
+{
+ libxl__dm_spawn_state *dmss = CONTAINER_OF(ev, *dmss, timeout);
+ device_model_postconfig_done(egc, dmss, rc); /* must be last */
+}
+
+
+static void device_model_postconfig_done(libxl__egc *egc,
+ libxl__dm_spawn_state *dmss,
+ int rc)
+{
+ EGC_GC;
+
+ if (rc)
+ LOGD(ERROR, dmss->guest_domid,
+ "Post DM startup configs failed, rc=%d", rc);
dmss_dispose(gc, dmss);
dmss->callback(egc, dmss, rc);
}
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index effc1c5bf9..5e09e602ed 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -100,6 +100,7 @@
#define LIBXL_DEVICE_MODEL_START_TIMEOUT 60
#define LIBXL_DEVICE_MODEL_SAVE_FILE XEN_LIB_DIR "/qemu-save" /* .$domid */
#define LIBXL_DEVICE_MODEL_RESTORE_FILE XEN_LIB_DIR "/qemu-resume" /* .$domid
*/
+#define LIBXL_QMP_CMD_TIMEOUT 10
#define LIBXL_STUBDOM_START_TIMEOUT 30
#define LIBXL_QEMU_BODGE_TIMEOUT 2
#define LIBXL_XENCONSOLE_LIMIT 1048576
@@ -1946,8 +1947,6 @@ _hidden libxl__qmp_handler
*libxl__qmp_initialize(libxl__gc *gc,
_hidden int libxl__qmp_run_command_flexarray(libxl__gc *gc, int domid,
const char *cmd,
flexarray_t *array);
-/* ask to QEMU the serial port information and store it in xenstore. */
-_hidden int libxl__qmp_query_serial(libxl__qmp_handler *qmp);
_hidden int libxl__qmp_pci_add(libxl__gc *gc, int d, libxl_device_pci *pcidev);
_hidden int libxl__qmp_pci_del(libxl__gc *gc, int domid,
libxl_device_pci *pcidev);
@@ -1993,10 +1992,6 @@ _hidden void libxl__qmp_close(libxl__qmp_handler *qmp);
* nothing happen */
_hidden void libxl__qmp_cleanup(libxl__gc *gc, uint32_t domid);
-/* this helper calls qmp_initialize, query_serial and qmp_close */
-_hidden int libxl__qmp_initializations(libxl__gc *gc, uint32_t domid,
- const libxl_domain_config
*guest_config);
-
/* `data' should contain a byte to send.
* When dealing with a non-blocking fd, it returns
* ERROR_NOT_READY on EWOULDBLOCK
@@ -3953,6 +3948,7 @@ struct libxl__dm_spawn_state {
/* mixed - spawn.ao must be initialised by user; rest is private: */
libxl__spawn_state spawn;
libxl__ev_qmp qmp;
+ libxl__ev_time timeout;
/* filled in by user, must remain valid: */
uint32_t guest_domid; /* domain being served */
libxl_domain_config *guest_config;
diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index f1529925ee..0d6aedcc7d 100644
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -143,121 +143,6 @@ static const int QMP_SOCKET_CONNECT_TIMEOUT = 5;
* QMP callbacks functions
*/
-static int store_serial_port_info(libxl__qmp_handler *qmp,
- const char *chardev,
- int port)
-{
- GC_INIT(qmp->ctx);
- char *path = NULL;
- int ret = 0;
-
- if (!(chardev && strncmp("pty:", chardev, 4) == 0)) {
- return 0;
- }
-
- path = libxl__xs_get_dompath(gc, qmp->domid);
- path = GCSPRINTF("%s/serial/%d/tty", path, port);
-
- ret = libxl__xs_printf(gc, XBT_NULL, path, "%s", chardev + 4);
-
- GC_FREE;
- return ret;
-}
-
-static int register_serials_chardev_callback(libxl__qmp_handler *qmp,
- const libxl__json_object *o,
- void *unused)
-{
- const libxl__json_object *obj = NULL;
- const libxl__json_object *label = NULL;
- const char *s = NULL;
- int i = 0;
- const char *chardev = NULL;
- int ret = 0;
-
- for (i = 0; (obj = libxl__json_array_get(o, i)); i++) {
- if (!libxl__json_object_is_map(obj))
- continue;
- label = libxl__json_map_get("label", obj, JSON_STRING);
- s = libxl__json_object_get_string(label);
-
- if (s && strncmp("serial", s, strlen("serial")) == 0) {
- const libxl__json_object *filename = NULL;
- char *endptr = NULL;
- int port_number;
-
- filename = libxl__json_map_get("filename", obj, JSON_STRING);
- chardev = libxl__json_object_get_string(filename);
-
- s += strlen("serial");
- port_number = strtol(s, &endptr, 10);
- if (*s == 0 || *endptr != 0) {
- LIBXL__LOGD(qmp->ctx, LIBXL__LOG_ERROR, qmp->domid,
- "Invalid serial port number: %s", s);
- return -1;
- }
- ret = store_serial_port_info(qmp, chardev, port_number);
- if (ret) {
- LIBXL__LOGD_ERRNO(qmp->ctx, LIBXL__LOG_ERROR, qmp->domid,
- "Failed to store serial port information"
- " in xenstore");
- return ret;
- }
- }
- };
-
- return ret;
-}
-
-static int qmp_write_domain_console_item(libxl__gc *gc, int domid,
- const char *item, const char *value)
-{
- char *path;
-
- path = libxl__xs_get_dompath(gc, domid);
- path = GCSPRINTF("%s/console/%s", path, item);
-
- return libxl__xs_printf(gc, XBT_NULL, path, "%s", value);
-}
-
-static int qmp_register_vnc_callback(libxl__qmp_handler *qmp,
- const libxl__json_object *o,
- void *unused)
-{
- GC_INIT(qmp->ctx);
- const libxl__json_object *obj;
- const char *addr, *port;
- int rc = -1;
-
- if (!libxl__json_object_is_map(o)) {
- goto out;
- }
-
- obj = libxl__json_map_get("enabled", o, JSON_BOOL);
- if (!obj || !libxl__json_object_get_bool(obj)) {
- rc = 0;
- goto out;
- }
-
- obj = libxl__json_map_get("host", o, JSON_STRING);
- addr = libxl__json_object_get_string(obj);
- obj = libxl__json_map_get("service", o, JSON_STRING);
- port = libxl__json_object_get_string(obj);
-
- if (!addr || !port) {
- LOGD(ERROR, qmp->domid, "Failed to retrieve VNC connect information.");
- goto out;
- }
-
- rc = qmp_write_domain_console_item(gc, qmp->domid, "vnc-listen", addr);
- if (!rc)
- rc = qmp_write_domain_console_item(gc, qmp->domid, "vnc-port", port);
-
-out:
- GC_FREE;
- return rc;
-}
-
static int qmp_capabilities_callback(libxl__qmp_handler *qmp,
const libxl__json_object *o, void *unused)
{
@@ -851,20 +736,6 @@ void libxl__qmp_cleanup(libxl__gc *gc, uint32_t domid)
}
}
-int libxl__qmp_query_serial(libxl__qmp_handler *qmp)
-{
- return qmp_synchronous_send(qmp, "query-chardev", NULL,
- register_serials_chardev_callback,
- NULL, qmp->timeout);
-}
-
-static int qmp_query_vnc(libxl__qmp_handler *qmp)
-{
- return qmp_synchronous_send(qmp, "query-vnc", NULL,
- qmp_register_vnc_callback,
- NULL, qmp->timeout);
-}
-
static int pci_add_callback(libxl__qmp_handler *qmp,
const libxl__json_object *response, void *opaque)
{
@@ -1085,24 +956,6 @@ int libxl__qmp_restore(libxl__gc *gc, int domid, const
char *state_file)
NULL, NULL);
}
-static int qmp_change(libxl__gc *gc, libxl__qmp_handler *qmp,
- char *device, char *target, char *arg)
-{
- libxl__json_object *args = NULL;
- int rc = 0;
-
- libxl__qmp_param_add_string(gc, &args, "device", device);
- libxl__qmp_param_add_string(gc, &args, "target", target);
- if (arg) {
- libxl__qmp_param_add_string(gc, &args, "arg", arg);
- }
-
- rc = qmp_synchronous_send(qmp, "change", args,
- NULL, NULL, qmp->timeout);
-
- return rc;
-}
-
int libxl__qmp_resume(libxl__gc *gc, int domid)
{
return qmp_run_command(gc, domid, "cont", NULL, NULL, NULL);
@@ -1293,28 +1146,6 @@ int libxl_qemu_monitor_command(libxl_ctx *ctx, uint32_t
domid,
return AO_INPROGRESS;
}
-int libxl__qmp_initializations(libxl__gc *gc, uint32_t domid,
- const libxl_domain_config *guest_config)
-{
- const libxl_vnc_info *vnc = libxl__dm_vnc(guest_config);
- libxl__qmp_handler *qmp = NULL;
- int ret = 0;
-
- qmp = libxl__qmp_initialize(gc, domid);
- if (!qmp)
- return -1;
- ret = libxl__qmp_query_serial(qmp);
- if (!ret && vnc && vnc->passwd) {
- ret = qmp_change(gc, qmp, "vnc", "password", vnc->passwd);
- qmp_write_domain_console_item(gc, domid, "vnc-pass", vnc->passwd);
- }
- if (!ret) {
- ret = qmp_query_vnc(qmp);
- }
- libxl__qmp_close(qmp);
- return ret;
-}
-
/*
* Functions using libxl__ev_qmp
--
Anthony PERARD
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