#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
#include "qga/guest-agent-core.h"
#include "qga-qmp-commands.h"
#include "qapi/qmp/qerror.h"
return;
}
- /* succeded */
+ /* succeeded */
+}
+
+int64_t qmp_guest_get_time(Error **errp)
+{
+ int ret;
+ qemu_timeval tq;
+ int64_t time_ns;
+
+ ret = qemu_gettimeofday(&tq);
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "Failed to get time");
+ return -1;
+ }
+
+ time_ns = tq.tv_sec * 1000000000LL + tq.tv_usec * 1000;
+ return time_ns;
+}
+
+void qmp_guest_set_time(int64_t time_ns, Error **errp)
+{
+ int ret;
+ int status;
+ pid_t pid;
+ Error *local_err = NULL;
+ struct timeval tv;
+
+ /* year-2038 will overflow in case time_t is 32bit */
+ if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
+ error_setg(errp, "Time %" PRId64 " is too large", time_ns);
+ return;
+ }
+
+ tv.tv_sec = time_ns / 1000000000;
+ tv.tv_usec = (time_ns % 1000000000) / 1000;
+
+ ret = settimeofday(&tv, NULL);
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "Failed to set time to guest");
+ return;
+ }
+
+ /* Set the Hardware Clock to the current System Time. */
+ pid = fork();
+ if (pid == 0) {
+ setsid();
+ reopen_fd_to_null(0);
+ reopen_fd_to_null(1);
+ reopen_fd_to_null(2);
+
+ execle("/sbin/hwclock", "hwclock", "-w", NULL, environ);
+ _exit(EXIT_FAILURE);
+ } else if (pid < 0) {
+ error_setg_errno(errp, errno, "failed to create child process");
+ return;
+ }
+
+ ga_wait_child(pid, &status, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ if (!WIFEXITED(status)) {
+ error_setg(errp, "child process has terminated abnormally");
+ return;
+ }
+
+ if (WEXITSTATUS(status)) {
+ error_setg(errp, "hwclock failed to set hardware clock to system time");
+ return;
+ }
}
typedef struct GuestFileHandle {
QTAILQ_HEAD(, GuestFileHandle) filehandles;
} guest_file_state;
-static void guest_file_handle_add(FILE *fh)
+static int64_t guest_file_handle_add(FILE *fh, Error **errp)
{
GuestFileHandle *gfh;
+ int64_t handle;
+
+ handle = ga_get_fd_handle(ga_state, errp);
+ if (error_is_set(errp)) {
+ return 0;
+ }
gfh = g_malloc0(sizeof(GuestFileHandle));
- gfh->id = fileno(fh);
+ gfh->id = handle;
gfh->fh = fh;
QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
+
+ return handle;
}
static GuestFileHandle *guest_file_handle_find(int64_t id, Error **err)
{
FILE *fh;
int fd;
- int64_t ret = -1;
+ int64_t ret = -1, handle;
if (!has_mode) {
mode = "r";
return -1;
}
- guest_file_handle_add(fh);
- slog("guest-file-open, handle: %d", fd);
- return fd;
+ handle = guest_file_handle_add(fh, err);
+ if (error_is_set(err)) {
+ fclose(fh);
+ return -1;
+ }
+
+ slog("guest-file-open, handle: %d", handle);
+ return handle;
}
void qmp_guest_file_close(int64_t handle, Error **err)
return NULL;
}
+#define SYSCONF_EXACT(name, err) sysconf_exact((name), #name, (err))
+
+static long sysconf_exact(int name, const char *name_str, Error **err)
+{
+ long ret;
+
+ errno = 0;
+ ret = sysconf(name);
+ if (ret == -1) {
+ if (errno == 0) {
+ error_setg(err, "sysconf(%s): value indefinite", name_str);
+ } else {
+ error_setg_errno(err, errno, "sysconf(%s)", name_str);
+ }
+ }
+ return ret;
+}
+
+/* Transfer online/offline status between @vcpu and the guest system.
+ *
+ * On input either @errp or *@errp must be NULL.
+ *
+ * In system-to-@vcpu direction, the following @vcpu fields are accessed:
+ * - R: vcpu->logical_id
+ * - W: vcpu->online
+ * - W: vcpu->can_offline
+ *
+ * In @vcpu-to-system direction, the following @vcpu fields are accessed:
+ * - R: vcpu->logical_id
+ * - R: vcpu->online
+ *
+ * Written members remain unmodified on error.
+ */
+static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
+ Error **errp)
+{
+ char *dirpath;
+ int dirfd;
+
+ dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
+ vcpu->logical_id);
+ dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
+ if (dirfd == -1) {
+ error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
+ } else {
+ static const char fn[] = "online";
+ int fd;
+ int res;
+
+ fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
+ if (fd == -1) {
+ if (errno != ENOENT) {
+ error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
+ } else if (sys2vcpu) {
+ vcpu->online = true;
+ vcpu->can_offline = false;
+ } else if (!vcpu->online) {
+ error_setg(errp, "logical processor #%" PRId64 " can't be "
+ "offlined", vcpu->logical_id);
+ } /* otherwise pretend successful re-onlining */
+ } else {
+ unsigned char status;
+
+ res = pread(fd, &status, 1, 0);
+ if (res == -1) {
+ error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
+ } else if (res == 0) {
+ error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
+ fn);
+ } else if (sys2vcpu) {
+ vcpu->online = (status != '0');
+ vcpu->can_offline = true;
+ } else if (vcpu->online != (status != '0')) {
+ status = '0' + vcpu->online;
+ if (pwrite(fd, &status, 1, 0) == -1) {
+ error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
+ fn);
+ }
+ } /* otherwise pretend successful re-(on|off)-lining */
+
+ res = close(fd);
+ g_assert(res == 0);
+ }
+
+ res = close(dirfd);
+ g_assert(res == 0);
+ }
+
+ g_free(dirpath);
+}
+
+GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
+{
+ int64_t current;
+ GuestLogicalProcessorList *head, **link;
+ long sc_max;
+ Error *local_err = NULL;
+
+ current = 0;
+ head = NULL;
+ link = &head;
+ sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err);
+
+ while (local_err == NULL && current < sc_max) {
+ GuestLogicalProcessor *vcpu;
+ GuestLogicalProcessorList *entry;
+
+ vcpu = g_malloc0(sizeof *vcpu);
+ vcpu->logical_id = current++;
+ vcpu->has_can_offline = true; /* lolspeak ftw */
+ transfer_vcpu(vcpu, true, &local_err);
+
+ entry = g_malloc0(sizeof *entry);
+ entry->value = vcpu;
+
+ *link = entry;
+ link = &entry->next;
+ }
+
+ if (local_err == NULL) {
+ /* there's no guest with zero VCPUs */
+ g_assert(head != NULL);
+ return head;
+ }
+
+ qapi_free_GuestLogicalProcessorList(head);
+ error_propagate(errp, local_err);
+ return NULL;
+}
+
+int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
+{
+ int64_t processed;
+ Error *local_err = NULL;
+
+ processed = 0;
+ while (vcpus != NULL) {
+ transfer_vcpu(vcpus->value, false, &local_err);
+ if (local_err != NULL) {
+ break;
+ }
+ ++processed;
+ vcpus = vcpus->next;
+ }
+
+ if (local_err != NULL) {
+ if (processed == 0) {
+ error_propagate(errp, local_err);
+ } else {
+ error_free(local_err);
+ }
+ }
+
+ return processed;
+}
+
#else /* defined(__linux__) */
void qmp_guest_suspend_disk(Error **err)
return NULL;
}
+GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
+{
+ error_set(errp, QERR_UNSUPPORTED);
+ return NULL;
+}
+
+int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
+{
+ error_set(errp, QERR_UNSUPPORTED);
+ return -1;
+}
+
#endif
#if !defined(CONFIG_FSFREEZE)
projects / qemu.git / blobdiff